JP2017031640A - Weir and manhole structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weir capable of controlling a water level of a water channel substantially constant at a low cost with a simple structure. SOLUTION: Weirs 5 and 6 for controlling the flow rate of water 4 flowing downstream, the weirs 5 and 6 always have an opening 7 through which water 4 flows under the weirs 5 and 6, and the opening 7 When a large amount of water 4 exceeding the flow rate that can flow down flows into the water channel 1, the level of the water upstream of the water channel 1 rises due to the action of the weirs 5 and 6, and the water 4 is stored in the water channel 1. The amount of water flowing downstream is controlled, and when the upstream rises to a predetermined water level, the weirs 5 and 6 provided in the water channel 1 that the weirs 5 and 6 release with the pressure, the water pressure acting on the weirs 5 and 6 Accordingly, at least a part of the weirs 5 and 6 is elastically deformed and discharged, and the elastic deformation is restored to control the water discharge. [Selection] Figure 2

Description

  The present invention relates to a weir provided in a water channel such as a combined sewer, and a manhole structure provided with the weir.

  Conventionally, a combined sewer is a sewer that removes sewage and rainwater with the same pipe, and has an effect of improving the living environment and preventing flooding by laying one pipe. On the other hand, in heavy rain, it may be flooded beyond the allowable flow capacity of the laid pipe in the downstream area. In addition, there is a problem that the environment deteriorates due to discharged water in rainy weather.

  In the combined sewer, a part of the sewage mixed with rainwater and sewage during rainy weather is untreated and discharged into a river or the like. At this time, there are concerns about the impact on public water facilities such as deterioration of water quality of tap water sources and deterioration of the environment of beaches and various leisure facilities due to contamination of organic matter, nitrogen, phosphorus, etc. contained in the discharged sewage.

  In combined sewers, road surfaces in untreated effluent discharged from rainwater outlets by removing contaminants with screens, etc., for the purpose of reducing contamination and pollution and ensuring public health safety Improving landscape problems in the discharge area due to sediments, sediments in pipes, etc.

  To reduce pollution, increase the amount of sewage that can be treated at the sewage treatment plant, install storage facilities such as storage pipes and rainwater reservoirs, store overflow water from the rainwater outlet, and send it to the treatment plant after the rain has ended. High-end processing.

  On the other hand, installation of water storage facilities may be expensive depending on the location conditions. Moreover, there is a limit in the existing treatment plant even if the amount of interception is increased and the amount of sewage sent to the treatment plant is increased. In addition, when it is necessary to pay special attention to the impact on public health due to the water use status of the discharge destination water area, disinfection will be performed while paying sufficient attention to the ecosystem at the discharge destination.

  Further, since the water flow is directly received by the weir, the strength of the manhole body must be increased, and noise is generated when the water flow hits the weir. On the other hand, it is difficult to increase the strength of existing manholes.

  Therefore, there has been proposed one that changes the water discharge amount by opening and closing the weir only by natural force during guerrilla heavy rain. In patent document 1, the water stop board pivotally supported by the predetermined | prescribed height site | part and the balancer which balances an upper water stop pressure and a lower water stop pressure are provided. Further, in Patent Document 2, a mounting base for moving a balancing heavy object is attached to the upper downstream side of the weir plate, and the water pressure on the upstream side of the weir plate and the balancing heavy object are balanced, and water increases due to rainfall. If the weight for balancing is rotated on the platform and moved to near the weir plate, the increased water on the upstream side of the weir plate is discharged to the downstream side, and if there is no water stored on the upstream side, the weight for balancing is loaded again. Rotates on the table and fits downstream, and stores water again upstream of the dam.

  Further, in Patent Document 3, elastic pieces that are pressed against the left and right side walls of the water by water pressure are extended to the left and right ends of the flexible belt-like sheet of the water stop cover provided in a state that is inclined in a direction against the water flow on the horizontal rod. Provided. In Patent Document 4, the height of the open / close weir (the first movable weir, the second movable weir, and the upper weir) changes depending on the balance between the weight of water stored in the upper weir and the weight.

Japanese Utility Model Publication No. 06-018440 Japanese Utility Model Publication No. 62-154032. Utility Model Registration No. 3030436 Utility Model Registration No. 3044771

  However, the techniques of Patent Documents 1 to 4 have a problem that the structure for storing in the pipe is complicated and expensive.

  The present invention solves the above-mentioned problems, and an object thereof is to provide a weir that has a simple structure and can be stored in a pipe at low cost.

  A typical structure of the weir according to the present invention for achieving the above object is a weir for controlling the flow rate of water flowing downstream, and the weir always has a space part through which water flows under the weir. When a large amount of water exceeding the flow rate that can flow down in the space flows into the water channel, the water level rises upstream of the water channel due to the action of the weir, and the amount of water flowing downstream by storing water in the water channel When the upstream rises to a predetermined water level, the weir is provided in the water channel that is released by the pressure, and at least a part of the weir is elastically deformed according to the water pressure acting on the weir. It is characterized by controlling water discharge by discharging water and restoring its elastic deformation.

  According to the present invention, at least a part of the weir is elastically deformed according to the water pressure acting on the weir without being submerged beyond the allowable flow capacity of the laid pipe in the downstream area during heavy rain due to in-pipe storage in the upstream part. Then, the water is discharged and the elastic deformation is restored to control the water discharge, so that a drive source is not required and the water level of the water channel can be controlled at a low cost with a simple structure.

It is a section explanatory view showing composition of a 1st embodiment of a manhole structure which provided a dam concerning the present invention in a manhole body. (A) is perspective explanatory drawing which shows the state in which the weir provided in the manhole body in the first embodiment is closed, and (b) is a part of the weir provided in the manhole body in the first embodiment is elastically deformed. It is a perspective explanatory view showing the state where water is discharged. It is a fragmentary perspective view which shows the structure by which the water stop member is supported so that opening and closing is possible by deformation | transformation of an elastic member in 1st Embodiment. It is the figure which compared the relationship between a stored water level and a discharge flow rate about the weir of 1st Embodiment and the fixed type weir as a comparative example. It is a disassembled perspective view which shows the other structure in which the water stop member is supported so that opening and closing is possible by the deformation | transformation of an elastic member in 2nd Embodiment. (A) is plane explanatory drawing which shows the state where the weir is closed when the weir is constituted by a water stop member made entirely of an elastic body in the third embodiment, and (b) is a water discharge due to elastic deformation of the water stop member. It is plane explanatory drawing which shows the state to do. (A) is perspective explanatory drawing which shows the state which the weir which connected a pair of water stop member in the 4th embodiment by the elastic member which can elastically deform is closed, (b) is an elastic member elastically deformed in 4th Embodiment. It is a perspective explanatory view showing the state where water is discharged. (A) is arrange | positioned so that the elastic member which can be elastically deformed provided in the edge part of one water-stopping member among a pair of water-stopping members may overlap with the edge part of the other water-stopping member in 5th Embodiment. FIG. 7B is a perspective explanatory view showing a state in which the weir is closed, and FIG. 7B is a perspective explanatory view showing a state in which the elastic member is elastically deformed and discharged in the fifth embodiment. (A) is perspective explanatory drawing which shows the state where the weir arrange | positioned by the elastic member which can be elastically deformed provided in each edge part of a pair of water-stopping member contact | abutting mutually is closed in 6th Embodiment. b) is a perspective explanatory view showing a state in which an elastic member elastically deforms and discharges water in the sixth embodiment. (A) is perspective explanatory drawing which shows the state which the weir which provided the elastic member which can be elastically deformed in part in 7th Embodiment is closed, (b) is the elastic member in 7th Embodiment elastically deformed, and water discharge It is an isometric view explanatory drawing which shows the state to do. (A) is perspective explanatory drawing which shows the state which the weir which provided the elastic member which can be elastically deformed in part in 8th Embodiment is closed, (b) is an elastic member elastically deformed in 8th Embodiment, and water discharge It is an isometric view explanatory drawing which shows the state to do.

  An embodiment of a manhole structure provided with a weir according to the present invention will be specifically described with reference to the drawings.

  First, the structure of 1st Embodiment of the manhole structure provided with the weir which concerns on this invention using FIGS. 1-4 is demonstrated.

  In FIG. 1, 2 is a manhole provided on the upstream side of the water channel 1, and 3 is a manhole provided on the downstream side of the manhole 2. A pipe line 13 is connected upstream of the manhole 2, and a pipe line 14 is connected between the manholes 2 and 3. A pipe line 15 is connected downstream of the manhole 3.

  In each manhole 2, 3 main body (inside the manhole main body), weirs 5, 6 are provided to control the flow rate of water 4 (combined water consisting of sewage and rainwater) flowing downstream. As shown in FIGS. 2A and 2B, the weirs 5 and 6 are each provided with an opening 7 that constitutes a space portion through which water 4 flows under the weirs 5 and 6. Although the opening 7 of the present embodiment is configured in a square shape, the space where the water 4 flows under the weirs 5 and 6 can have various other shapes such as a round hole.

  The water level at the downstream end of the pipe 13 connected upstream of the manhole 2 is arranged at the upper end position (the same height) of the weir 5 provided in the main body of the manhole 2 and connects between the manholes 2 and 3. The upstream end water level of the pipeline 14 is arranged at a position corresponding to the opening 7 provided in the lower portion of the weir 5.

  Further, the downstream end portion of the conduit 14 connecting the manholes 2 and 3 is disposed at a position corresponding to the upper end portion of the weir 6 provided in the main body of the manhole 3, and is connected to the downstream of the manhole 3. The upstream end portion of the pipe line 15 is disposed at a position corresponding to the opening 7 provided in the lower portion of the weir 6.

  When a large amount of water 4 exceeding the flow rate that can flow down through the opening 7 due to heavy rain or the like flows into the channel 1, the upstream of the channel 1 is caused by the action of the respective weirs 5 and 6 provided in the main bodies 2 and 3. The reservoir water levels h1 and h2 rise, and the amount of water flowing downstream is controlled by storing the water 4 in the water channel 1 (in the water channel). When the upstream reaches the predetermined reservoir water levels h1 and h2, The weirs 5 and 6 are released.

  At least a part of each of the weirs 5 and 6 is elastically deformed and discharged according to the water pressure acting on the weirs 5 and 6 provided in the main bodies of the manholes 2 and 3 of the water channel 1. Alternatively, the water discharge is controlled by restoring the elastic deformation.

  The weirs 5 and 6 shown in FIG. 2 and FIG. 3 are attached to stainless steel support fittings 8 fixed to the respective wall surfaces 2a, 2b, 3a and 3b on both sides of the manholes 2 and 3 which are the quay walls of the water channel 1. A pair of elastic members 9 made of a rubber elastic body that can be elastically deformed, and a pair of water stop members 10 that are supported so as to be opened and closed by the elastic deformation of the elastic members 9. . The water stop member 10 is made of a stainless plate, a synthetic resin plate, a concrete plate, or the like.

  As shown in FIG. 3, the support fitting 8 of the present embodiment includes a receiving piece 8a that receives the elastic member 9, and a pair of upright pieces that are connected to both sides of the receiving piece 8a at right angles to the receiving piece 8a. 8b and a pair of fixing pieces 8c connected to one side of the upright piece 8b at right angles to the upright piece 8b, and the respective wall surfaces 2a on both sides of the manholes 2 and 3 main body. , 2b, 3a, 3b, a pair of fixed pieces 8c are fixed to each other, and an end portion of the elastic member 9 is inserted into a U-shaped receiving portion 8d formed by the receiving piece 8a and the pair of upstanding pieces 8b. The

  Insert nuts (not shown) are embedded in the respective wall surfaces 2a, 2b, 3a, 3b on both sides of each of the manholes 2, 3, and fixing bolts 11 are inserted into through holes 8c1 (see FIG. 5) provided in the respective fixing pieces 8c. Are inserted into the respective wall surfaces 2a, 2b, 3a, 3b on both sides of each of the manholes 2, 3 to be screwed and fastened to insert nuts (not shown) so that the support fitting 8 is attached to each of the manholes 2, 3 It fixes to each wall surface 2a, 2b, 3a, 3b of both sides.

  The elastic member 9 of the present embodiment is provided with a plurality of (four in the present embodiment shown in FIG. 3) through-holes 9 a penetrating in the thickness direction. The fixing bolt 12 is inserted through the provided through hole 8b1 (see FIG. 5) and the through hole 9a of the elastic member 9 from the outside of one upright piece 8b and exposed from the outside of the other upright piece 8b. The elastic member 9 is fixed to the support fitting 8 by screwing and fastening a nut (not shown) to the bolt 12.

  A groove 9b having a U-shaped cross section is formed from one side to the center of the elastic member 9, and one end of the water stop member 10 is press-fitted into the groove 9b. As a result, the pair of water-stop members 10 are supported by the support bracket 8 via the elastic member 9 made of an elastically deformable elastic body such as rubber. It is fixed to. An opening 7 is formed at the lower end on the open side of each water stop member 10.

  As shown in FIG. 2B, a large amount of water 4 flows into the water channel 1 due to heavy rain or the like, and from an elastic body that can be elastically deformed, such as rubber, according to the water pressure acting on the pair of water stop members 10. The elastic members 9 are elastically deformed, and the pair of water-stopping members 10 are rotated around the elastic members 9 to be opened, and the water 4 is discharged from between the pair of water-stopping members 10.

  Further, as shown in FIG. 2A, the elastic deformation is restored by the restoring force of each elastic member 9 according to the water pressure acting on the pair of water stopping members 10 when rain falls and the pair of water stopping members 10. Is rotated around each elastic member 9 and closed, and the water 4 flows down from the opening 7.

  In this embodiment, the weirs 5 and 6 provided in the main bodies of the manholes 2 and 3 of the water channel 1 are divided into two in the vertical direction by a pair of water blocking members 10. Then, the respective connecting portions between the wall surfaces 2a, 2b, 3a, 3b on both sides of the manholes 2, 3 main body and the pair of water-stopping members 10 are connected by elastic members 9 made of an elastic body such as rubber. It is configured to have flexibility. As a result, each elastic member 9 is elastically deformed according to the water pressure acting on the pair of water stopping members 10, and the pair of water stopping members 10 are rotated around the respective elastic members 9 to be opened. Water 4 is discharged from between the water members 10.

  Each elastic member 9 begins to bend in response to the water pressure acting on the pair of water stop members 10. When the water pressure acting on the pair of water-stopping members 10 increases (the amount of water increases), the gap between the pair of water-stopping members 10 increases, and the discharge flow rate Q downstream increases accordingly. On the other hand, when the water pressure acting on the pair of water stop members 10 decreases (the amount of water decreases), the clearance between the pair of water stop members 10 decreases due to the restoring force of each elastic member 9, and accordingly. The downstream discharge flow rate Q decreases.

  This makes it possible to keep the stored water levels h1 and h2 (reserved amounts) of the water 4 stored in the main bodies of the manholes 2 and 3 serving as storage facilities, respectively. If the stored water levels h1 and h2 (reserved amounts) of the water 4 stored in the manholes 2 and 3 main bodies can be controlled, excessive water 4 may flow into the manholes 2 and 3 main bodies due to heavy rain and overflow. Can be prevented.

  Further, comparing the case where the lower end of the weirs 5 and 6 has the opening 7 with the case where the opening 7 is not present, the sewage is always stored upstream of the weirs 5 and 6 when the opening 7 is not present. Since odor etc. generate | occur | produce, it is not preferable.

  The elastic member 9 need not be limited to rubber, and various elastic members such as a spring plate and a spring can be applied as long as they are elastically deformable and have a restoring property.

  According to the present embodiment, at least a part of the weirs 5 and 6 is elastically deformed and discharged according to the water pressure acting on the weirs 5 and 6, and the elastic deformation is restored, so that a drive source or the like is separately provided. This is not necessary, and the stored water levels h1 and h2 (reserved amounts) of the water 4 stored in the main bodies of the manholes 2 and 3 provided in the water channel 1 can be controlled substantially uniformly at a low cost.

FIG. 4 is a diagram comparing the relationship between the stored water level h and the discharge flow rate Q for a fixed type weir in which a part of the weir is not elastically deformed and the weir of this embodiment. The vertical axis in FIG. 4 indicates the discharge flow rate Q (m ³ / sec), and the horizontal axis indicates the stored water level h (m). The stored water level ho on the horizontal axis indicates the water level at which the pair of water stop members 10 starts to open, and in the present embodiment, indicates the height of the pair of water stop members 10.

  A curve a indicated by a solid line in FIG. 4 shows the relationship between the stored water level h and the discharge flow rate Q due to the action of the weirs 5 and 6 of the present embodiment. A curve b shown by a broken line in FIG. 4 shows the relationship between the stored water level h and the discharge flow rate Q by the action of a fixed weir in which a part of the weir is not elastically deformed as a comparative example.

  In the curve a indicated by a solid line in FIG. 4, the curved portion a1 is formed of the water 4 stored in the main bodies 2 and 3 in the state where the pair of water blocking members 10 of the weirs 5 and 6 of the present embodiment is closed. A mode that the discharge flow Q which flows down from the opening 7 increases with the increase of the stored water level h1, h2 (reserved amount) is shown.

  When the stored water levels h1 and h2 of the water 4 stored in the manholes 2 and 3 reach the predetermined stored water level ho, the pair of water-stop members 10 of the weirs 5 and 6 of the present embodiment are moved to the elastic members 9 respectively. Each of them starts to open at a predetermined reservoir water level ho against the restoring force.

  When the stored water levels h1 and h2 of the water 4 stored in the manholes 2 and 3 reach the predetermined stored water level ho, the curve a indicated by a solid line in FIG. 4 is changed to a straight line portion a2 extending vertically upward. . The straight line portion a2 shows a state in which the discharge flow rate Q increases while the pair of water stop members 10 of the weirs 5 and 6 of the present embodiment starts to open at the stored water level ho and maintains a constant stored water level ho.

  When the water pressure acting on the pair of water stop members 10 increases (the amount of water increases), the gap between the pair of water stop members 10 expands against the restoring force of each elastic member 9, and accordingly As a result, the downstream discharge flow rate Q increases. At this time, the relationship is {amount of discharged water <inflow amount}.

  When the rainfall decreases, the curve a indicated by the solid line in FIG. 4 changes from the straight line portion a2 to the curved portion a3. When the water pressure acting on the pair of water stop members 10 decreases (the amount of water decreases), the restoring force of each elastic member 9 reduces the gap between the pair of water stop members 10, and accordingly, downstream. The discharge flow rate Q decreases. At this time, the relationship is {water discharge amount> inflow amount}.

  On the other hand, in the curve b shown by the broken line in FIG. 4, the curve portion b1 is a stored water level of the water 4 stored in the manholes 2 and 3 by a fixed weir in which a part of the weir is not elastically deformed as a comparative example. A mode that the discharge flow Q which flows down from the opening 7 increases with the increase in h1, h2 (storage amount) is shown.

  When the stored water levels h1 and h2 of the water 4 stored in the manholes 2 and 3 reach the predetermined stored water level ho, the curve b indicated by a broken line in FIG. 4 is changed to the curved portion b2. The curved portion b2 shows a state in which the discharge flow rate Q increases as the inflow rate increases and exceeds the fixed weir and the storage water level h (storage amount) increases.

  When the rainfall decreases, the curve b indicated by the broken line in FIG. 4 changes from the curve part b2 to the curve part b3. A curved line part b3 shows a state in which the inflow amount decreases, the stored water level h (stored amount) by the fixed weir decreases, and the downstream discharge flow rate Q decreases. At this time, the relationship is {water discharge amount> inflow amount}.

  Next, the structure of 2nd Embodiment of the manhole structure provided with the weir based on this invention is demonstrated using FIG. In addition, what was comprised similarly to the said 1st Embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  FIG. 5 is an exploded perspective view showing another configuration of the elastic member 9 that supports the pair of water-stop members 10 so as to be opened and closed by elastic deformation. As shown in FIG. 5, a joining piece 16a of a stainless steel fitting 16 is fixed to the end of the elastic member 9 opposite to the side where the water stop member 10 is provided by an adhesive or the like. A pair of fixed pieces 16b connected orthogonally to the joining piece 16a is provided, and the fixed piece 16b and the joining piece 16a are reinforced by ribs 16c.

  A pair of fixed pieces 16b of the metal fitting 16 are fitted into a U-shaped receiving portion 8d formed by the receiving piece 8a of the support metal fitting 8 shown in FIG. 5 and the pair of upstanding pieces 8b. A fixing bolt (not shown) is inserted into a through hole 8b1 provided in each standing piece 8b and a through hole 16b1 provided in each fixing piece 16b, and a nut is screwed and fastened, whereby the support fitting 8 and the joint hardware 16 are connected. Join.

  Insert nuts (not shown) are embedded in the respective wall surfaces 2a, 2b, 3a, 3b on both sides of each of the manholes 2, 3, and fixing bolts 11 are inserted into the through holes 8c1 provided in the fixing pieces 8c shown in FIG. The support bracket 8 is screwed and fastened to insert nuts (not shown) embedded in the respective wall surfaces 2a, 2b, 3a, 3b on both sides of the manholes 2, 3 main body, and the support fitting 8 is attached to both sides of the manholes 2, 3 main body. It fixes to each wall surface 2a, 2b, 3a, 3b.

  As a result, the pair of water-stop members 10 are connected to the respective wall surfaces 2a on both sides of the manholes 2 and 3 by the joint metal 16 and the support fitting 8 via the elastic member 9 made of an elastically deformable elastic body such as rubber. It is fixed to 2b, 3a, 3b. Other configurations are the same as those in the first embodiment, and the same effects can be obtained.

  Next, the configuration of the third embodiment of the manhole structure provided with the weir according to the present invention will be described with reference to FIGS. In addition, what was comprised similarly to each said embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  In this embodiment, as shown in FIGS. 6 (a) and 6 (b), the support metal fixture 8 having a U-shaped cross section is fixed to the respective wall surfaces 2a, 2b, 3a, 3b on both sides of the manholes 2, 3 main body. One end of each of the pair of water-stop members 10 made of a rubber elastic body is press-fitted and supported in the receiving portion 8d. Also in the present embodiment, as shown in FIG. 6B, the entire water stop member 10 according to the water pressure acting on the pair of water stop members 10 serving as elastically deformable elastic members constituting the weirs 5 and 6. The gap between the pair of water blocking members 10 expands against the restoring force of the water blocking member 10 due to elastic deformation, and water is discharged accordingly, and the downstream discharge flow rate Q increases.

  Further, the elastic deformation is restored as shown in FIG. 6A by the restoring force of the water stop member 10 according to the water pressure acting on the water stop member 10, and the gap between the pair of water stop members 10 is increased. Accordingly, the downstream discharge flow rate Q decreases. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  Next, the configuration of the fourth embodiment of the manhole structure provided with the weir according to the present invention will be described with reference to FIGS. In addition, what was comprised similarly to each said embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  As shown in FIGS. 7A and 7B, the weirs 5 and 6 of the present embodiment are provided on the respective wall surfaces 2 a and 3 a of one of the manholes 2 and 3 main bodies that become one quay of the water channel 1. A first hinge member 17, a second hinge member 18 provided on each of the other wall surfaces 2 b and 3 b of the manholes 2 and 3 serving as the other quay of the water channel 1, and the first hinge The first water stop member 19 supported by the member 17 so as to be opened and closed, the second water stop member 20 supported by the second hinge member 18 so as to be opened and closed, and the first and second water stop members. And an elastically deformable elastic member 21 composed of rubber, a coil spring, or the like for connecting the members 19 and 20. The elastic member 21 of the present embodiment is formed of a rubber band, and fixing portions 21a and 21b provided at both ends of the elastic member 21 are fixed to the first and second water stop members 19 and 20 with an adhesive or the like. Has been. The first and second water stop members 19 and 20 are made of a stainless plate, a synthetic resin plate, a concrete plate, or the like.

  In this embodiment, the 1st, 2nd water stop members 19 and 20 which comprise the weirs 5 and 6 are connected by the elastic member 21 which can be elastically deformed. And according to the water pressure which acts on the 1st, 2nd water stop members 19 and 20, it resists the pulling force (restoring force) of this elastic member 21, and the 1st and 2nd water stop members 19 and 20 As the gap between them expands, the elastic member 21 is elastically deformed and elongated as shown in FIG. 7 (b), and the water is discharged and the downstream discharge flow rate Q increases accordingly.

  Further, as shown in FIG. 7A, the elasticity of the elastic member 21 is caused by the pulling force (restoring force) of the elastic member 21 in accordance with the water pressure acting on the first and second water stop members 19 and 20. The deformation is restored and the gap between the first and second water stop members 19 and 20 is reduced, and the downstream discharge flow rate Q is reduced accordingly. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  Next, the structure of 5th Embodiment of the manhole structure provided with the weir based on this invention is demonstrated using FIG. 8 (a), (b). In addition, what was comprised similarly to each said embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  As shown in FIGS. 8A and 8B, the weirs 5 and 6 of the present embodiment are supported by the respective wall surfaces 2b and 3b of one of the manholes 2 and 3 serving as one quay of the water channel 1. A third water stop member 23, a fourth water stop member 24 supported by the other wall surfaces 2a and 3a of the manholes 2 and 3 serving as the other quay walls of the water channel 1, and the third water stop member 24. An elastic member 25 (second elastic member) made of an elastically deformable rubber plate or the like provided at the end of the water stop member 23 and overlapping with the end of the fourth water stop member 24 And is configured. The third and fourth water blocking members 23 and 24 are made of a stainless plate, a synthetic resin plate, a concrete plate, or the like. The end of the elastic member 25 is fixed to the end of the third water stop member 23 by a fixing bolt 26 or the like. The opposite end portions of the third and fourth water blocking members 23 and 24 are separated according to the length of the elastic member 25 in the left-right direction in FIG. The length of the elastic member 25 in the left-right direction in FIG. 8A is appropriately set depending on the discharge flow rate Q of the water 4 downstream, the hardness of the rubber, and the like.

  Then, the elastic member 25 is elastically deformed and opened as shown in FIG. 8B against the restoring force of the elastic member 25 according to the water pressure acting on the elastic member 25 constituting the weirs 5 and 6. Accordingly, water is discharged and the downstream discharge flow rate Q increases.

  Further, as shown in FIG. 8 (a), the elastic member 25 is restored from the elastic deformation according to the hydraulic pressure acting on the elastic member 25, and is then closed. The discharge flow rate Q decreases. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  Next, the structure of 6th Embodiment of the manhole structure provided with the weir based on this invention is demonstrated using Fig.9 (a), (b). In addition, what was comprised similarly to each said embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  As shown in FIGS. 9A and 9B, the weirs 5 and 6 of the present embodiment are supported by the respective wall surfaces 2b and 3b of one of the manholes 2 and 3 as the one quay of the water channel 1. A third water stop member 23, a fourth water stop member 24 supported by the other wall surfaces 2a and 3a of the manholes 2 and 3 serving as the other quay walls of the water channel 1, and the third water stop member 24. And third and fourth elastic members 27 and 28 made of elastically deformable rubber materials and the like provided at the respective end portions of the fourth water stop members 23 and 24 and arranged in contact with each other. Configured. The end surfaces of the third and fourth water blocking members 23 and 24 and the fixing surfaces 27a and 28a of the third and fourth elastic members 27 and 28 are fixed by an adhesive or the like. The opposing end surfaces of the third and fourth water-stop members 23 and 24 are separated according to the thickness of the third and fourth elastic members 27 and 28 in the left-right direction in FIG. The thickness of the third and fourth elastic members 27 and 28 in the left-right direction in FIG. 9A is appropriately set depending on the discharge flow rate Q downstream of the water 4, the hardness of the rubber, and the like.

  And according to the water pressure acting on the third and fourth elastic members 27, 28 constituting the weirs 5, 6, the third, As shown in FIG. 9B, the fourth elastic members 27 and 28 are elastically deformed, and the gap between the third and fourth elastic members 27 and 28 is expanded. The discharge flow rate Q increases.

  Further, as shown in FIG. 9 (a), the third and fourth elastic members 27 and 28 are restored by the restoring force of the third and fourth elastic members 27 and 28 according to the water pressure acting on the third and fourth elastic members 27 and 28. Then, the elastic deformation of the fourth elastic members 27 and 28 is restored, the gap between the third and fourth elastic members 27 and 28 is reduced, and the downstream discharge flow rate Q is reduced accordingly. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  Next, the configuration of the seventh embodiment of the manhole structure provided with the weir according to the present invention will be described with reference to FIGS. In addition, what was comprised similarly to each said embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  As shown in FIGS. 10 (a) and 10 (b), the weirs 5 and 6 of the present embodiment have respective wall surfaces 2a, 2b, 3a, The water stop member 29 is supported by 3b. The water stop member 29 is made of a stainless plate, a synthetic resin plate, a concrete plate, or the like. Openings 29a and 7 are provided at the upper and lower ends of the water stop member 29, respectively. An elastic member 30 made of an elastically deformable rubber plate or the like is provided in the opening 29 a at the upper end of the water stop member 29. In the present embodiment, both end surfaces 30a, 30b in the left-right direction in FIG. 10A of the elastic member 30 are both wall surfaces 29a1 in the left-right direction in FIG. 10A of the opening 29a provided at the upper end of the water stop member 29. 29a2 is fixed by an adhesive or the like.

  Then, the elastic member 30 is elastically deformed as shown in FIG. 10B against the restoring force of the elastic member 30 according to the water pressure acting on the elastic member 30 constituting the weirs 5 and 6, and the elasticity The gap between the lower end portion 30c of the member 30 and the lower end surface 29a3 of the opening 29a provided at the upper end portion of the water stop member 29 is expanded, and accordingly, the lower end portion 30c of the elastic member 30 and the water stop member 29 are expanded. Over the gap between the lower end surface 29a3 of the opening 29a and the upper end portion 30d of the elastic member 30 which is bent and lowered, the water is discharged and the downstream discharge flow rate Q is increased.

  Further, as shown in FIG. 10A, the elastic member 30 is restored from the elastic deformation by the restoring force of the elastic member 30 according to the water pressure acting on the elastic member 30, and the lower end 30c of the elastic member 30 is restored. And the gap between the opening 29a of the water stop member 29 and the lower end surface 29a3 is reduced, the height of the upper end portion 30d of the elastic member 30 is also increased, and the downstream discharge flow rate Q is reduced. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  Next, the configuration of the eighth embodiment of the manhole structure provided with the weir according to the present invention will be described with reference to FIGS. In addition, what was comprised similarly to each said embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  As shown in FIGS. 11A and 11B, the weirs 5 and 6 according to the present embodiment are supported by the respective wall surfaces 2b and 3b of one of the manholes 2 and 3 serving as one quay of the water channel 1. The water stop member 23, the water stop member 24 supported on the other wall surfaces 2a, 3a of the other manholes 2, 3 as the other quay of the water channel 1, and the water stop members 23, 24, respectively. An elastic member 25 made of an elastically deformable rubber plate or the like is fitted into fitting grooves 23a and 24a having a U-shaped cross section provided at the end of the plate, and is fixed by bonding with an adhesive or the like.

  A part of the elastic member 25 is provided with a thin opening valve 25a. The opening valve 25a of this embodiment is provided in two places up and down, and a plurality of triangular opening valves 25a are provided so as to be openable and closable with a peripheral edge portion 25b formed of a rectangular stepped portion as a hinge.

  Then, as shown in FIG. 11 (b), the opening valve 25a uses the peripheral edge 25b as a hinge against the restoring force of the opening valve 25a according to the water pressure acting on the elastic members 25 constituting the weirs 5 and 6. It is elastically deformed and released, and along with this, water is discharged and the downstream discharge flow rate Q increases.

  Further, as shown in FIG. 11 (a), the elastic deformation of the open valve 25a is restored and closed by the restoring force of the open valve 25a in accordance with the water pressure acting on the elastic member 25. The discharge flow rate Q decreases. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  In addition, in the water channel 1 shown in FIG. 1, although an example when there is a height difference between the manholes 2 and 3 was explained, in the water storage facility provided on the flat ground, the pipe line provided between the water tanks of the same height The weirs 5 and 6 of each of the above embodiments are provided, and the flow rate of water flowing from the upstream to the downstream of the water channel can be controlled by a pump or the like.

  As an application example of the present invention, the present invention can be applied to a weir provided in a waterway such as a combined sewer and a manhole structure provided with the weir.

a: Relationship curve between the stored water level h and the discharge flow rate Q due to the action of the weirs 5 and 6 of the present embodiment a1 ... curve part a2 ... a straight line part extending vertically upward in the curve a a3 ... curve part b ... Relationship curves between the stored water level h and the discharge flow rate Q due to the action of a fixed weir that is not elastically deformed in part b1, b2 ... curve portions h, h1, h2 ... stored water level ho ... storage where a pair of water stop members 10 starts to open Water level Q ... Discharge flow rate 1 ... Water channel 2,3 ... Manhole 2a, 2b, 3a, 3b ... Wall surface (quay of water channel 1)
4 ... Water 5, 6 ... Weir 7 ... Opening (space part)
DESCRIPTION OF SYMBOLS 8 ... Support metal fitting 8a ... Receiving piece 8b ... Standing piece 8b1 ... Through-hole 8c ... Fixed piece 8c1 ... Through-hole 8d ... Receiving part 9 ... Elastic member 9a ... Through-hole 9b ... Groove part 10 ... Water stop member 11, 12 ... Fixing bolt 13 to 15: Pipe line 16: Metal fitting 16a: Joint piece 16b ... Fixed piece 16b1 ... Through hole 16c ... Rib 17 ... First hinge member 18 ... Second hinge member 19 ... First water stop member 20 ... First Second water stop member 21... Elastic member 21a, 21b... Fixing portion 23. Third water stop member 24. Fourth water stop member 23a, 24a ... Fitting groove 25 ... Elastic member (second elastic member)
25a ... Opening valve 25b ... Peripheral part 26 ... Fixing bolt 27, 28 ... Third and fourth elastic members 27a, 28a ... Fixing surface 29 ... Water stop member 29a ... Opening 29a1, 29a2 ... Both wall surfaces 29a3 ... Lower end surface 30 ... Elastic members 30a, 30b ... both end faces 30c ... lower end 30d ... upper end

Claims (6)

A weir that controls the flow rate of water flowing downstream, and the weir always has a space where water flows under the weir, and when a large amount of water that exceeds the flow rate that can flow in the space flows into the water channel By the action of the weir, the water level upstream of the water channel rises, the amount of water flowing downstream is controlled by storing water in the water channel, and when the upstream rises to a predetermined water level, the weir is A weir in a waterway to be released,
A weir characterized in that at least a part of the weir is elastically deformed and discharged according to the water pressure acting on the weir, and the water discharge is controlled by restoring the elastic deformation. The weir is
An elastic member provided on the quay of the waterway;
A water stop member supported to be opened and closed by elastic deformation of the elastic member;
The weir according to claim 1, comprising: The weir is
A first hinge member provided on one quay of the waterway;
A second hinge member provided on the other quay of the waterway;
A first water stop member supported by the first hinge member so as to be opened and closed;
A second water stop member supported by the second hinge member so as to be opened and closed;
An elastically deformable elastic member connecting the first and second water stop members;
The weir according to claim 1, comprising: The weir is
A third water stop member supported on one quay of the waterway;
A fourth water stop member supported on the other quay of the waterway;
A second elastic member that is provided at an end of the third water-stopping member and is arranged to overlap with an end of the fourth water-stopping member;
The weir according to claim 1, comprising: The weir is
A third water stop member supported on one quay of the waterway;
A fourth water stop member supported on the other quay of the waterway;
The third and fourth elastic members that are provided at the respective end portions of the third and fourth water-stop members and are elastically deformable and arranged in contact with each other;
The weir according to claim 1, comprising:   A manhole structure, wherein the weir according to any one of claims 1 to 5 is provided in a manhole body.

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