TWI868789B - Alarm valve - Google Patents

Abstract

The alarm valve of the present invention is characterized in that it comprises: a valve housing, a valve disc working space of a specified size is formed between the primary side main pipeline and the secondary side branch pipeline; a seat ring, which is arranged on the inner peripheral surface of the primary side main pipeline as an outlet of fire water; a support ring, which is arranged on the inner peripheral surface of the secondary side branch pipeline and has a pin hole formed in the center of the support rod; a guide pin, one end of which is engaged and fixed in the pin hole of the support ring and the other end is vertically arranged toward the seat ring; a valve disc, which is slidably inserted in the guide hole formed in the center of the upper surface, and is The guide pin of the guide hole is vertically raised and lowered, and the primary side main pipe is opened and closed by contact and non-contact with the seat ring; and the elastic member is compressed when the valve disc rises, and is assembled to the guide pin in a manner of applying tension when the valve disc descends to maintain the sealing force of the valve disc. In order to increase the sealing pressure between the valve disc and the seat ring, an adjustment pin that contacts the back of the valve disc is provided at the front end of the paddle of the paddle switch in a manner that can be adjusted in height, thereby facilitating the setting adjustment of the fire signal sending switch.

Description

Alarm valve

The present invention relates to an alarm valve, and more specifically, to a cylindrical alarm valve which does not need to worry about water leakage caused by imbalance of sealing pressure when a valve disc is opened and closed, can prevent erroneous operation, and is easy to install a fire signal transmission switch.

Generally, an alarm valve is installed on the fire water supply pipeline at the most basic level. When the fire water supply starts due to a fire, it automatically notifies the fire fighting equipment of the control panel.

Such an alarm valve is installed between the primary side fire water supply pipeline and the secondary side fire water supply pipeline equipped with a sprinkler. In a normal state where no fire occurs, the alarm valve shuts off the primary side fire water supply pipeline and the secondary side fire water supply pipeline.

However, when a fire occurs and the sprinkler provided on the secondary side fire water supply pipeline operates to spray fire water, the flow path of the alarm valve is automatically opened due to the pressure difference between the fire water in the secondary side fire water supply pipeline and the primary side fire water supply pipeline, so that the fire water in the primary side fire water supply pipeline is continuously supplied to the secondary side fire water supply pipeline, thereby being able to suppress the fire early by utilizing the continuous spraying of fire water through the sprinkler.

The alarm valve is provided with a dip switch that changes the position of the dipstick by using the fire water supplied through the primary-side fire water supply pipeline. Therefore, when fire water is supplied due to a fire, the dip switch automatically notifies the control panel of the occurrence of the fire.

As for the prior art related to such an alarm valve, there is the Korean registered patent No. 10-1285294 (notified on July 11, 2013) "Water flow sensing device for fire alarm valve" disclosed in the following prior art document 1.

In the patent document 1, a valve disc that rotates about a hinge shaft on one side is arranged to contact a seat ring between a primary-side fire water supply pipeline (flow path) and a secondary-side fire water supply pipeline (flow path) inside a valve housing, thereby opening and closing the primary-side fire water supply pipeline and the secondary-side fire water supply pipeline.

As another prior art, there is Korean registered patent No. 10-2358358 (notified on 2022.02.08.) "Alarm valve" disclosed in patent document 2 of the following prior art document.

The alarm valve of Patent Document 2 is also configured such that a valve disc that rotates about a hinge axis between a primary-side fire water supply pipeline (flow path) and a secondary-side fire water supply pipeline (flow path) inside a valve housing is arranged to contact a seat ring, thereby opening and closing the primary-side fire water supply pipeline and the secondary-side fire water supply pipeline.

Patent document 1: Korean Registered Patent Gazette No. 10-1285294 (published on July 11, 2013)

Patent Document 2: Korean Registered Patent Gazette No. 10-2358358 (published on 2022.02.08)

However, the alarm valves of Patent Documents 1 and 2 have the following structural problem: when the valve disc rotating about the hinge axis contacts the seat ring to close the flow path, the pressure of the fire water in the primary-side fire water supply pipeline acts more strongly on the opposite side than on the hinge axis of the valve disc, causing concern about water leakage due to imbalance in the sealing pressure with the seat ring.

Furthermore, in Patent Documents 1 and 2, since the position of the paddle for operating the paddle switch is fixed, there is a problem that it is difficult to install the fire signal transmission switch.

The present invention is proposed to solve the problems of Patent Documents 1 and 2, and to provide an alarm valve in which the sealing pressure when the alarm valve is closed by the contact between the seat ring and the valve disc acts on the entire periphery of the valve disc in a balanced manner, thereby eliminating the need to worry about water leakage and preventing erroneous operation.

Another object of the present invention is to provide an alarm valve that can easily adjust the gap between the paddle and the valve disc that causes the paddle switch to operate, thereby making the setting of the fire signal sending switch easy to adjust.

In order to achieve the above-mentioned purpose, the present invention is characterized in that the alarm valve with a paddle switch installed on one side comprises: a valve housing, a valve disc working space of a specified size is formed between the primary side main pipeline and the secondary side branch pipeline; a seat ring, which is arranged on the inner peripheral surface of the primary side main pipeline as an outlet of fire water; a support ring, which is arranged on the inner peripheral surface of the secondary side branch pipeline and has a pin hole formed in the center of the support rod; a guide pin, one end of which is engaged with the guide pin; A pin hole fixed to the support ring, with the other end thereof being vertically arranged toward the seat ring; a valve disc vertically rising and falling along a guide pin which is slidably inserted into a guide hole formed in the center of the upper surface, and opening and closing the primary side main pipe by contact and non-contact with the seat ring; and an elastic member which is compressed when the valve disc rises and is assembled to the guide pin in a manner of applying tension when the valve disc descends to maintain the sealing force of the valve disc.

In this case, it is preferred that only the back surface of the valve flap be formed into a cone shape, or both the back surface and the front surface be formed into cone shapes in order to reduce resistance when the fire fighting water in the primary-side main pipe flows toward the secondary-side manifold.

Furthermore, the seat ring is characterized in that the inclined engaging surface of the inner peripheral opening edge in contact with the valve disc is bent into a circular sealing ring made of rubber material, and the valve disc ring is engaged with the peripheral portion of the valve disc in contact with the sealing ring, and the sealing ring is in linear contact with the valve disc ring when the valve disc descends.

In addition, the valve flap is characterized in that a hollow portion is formed inside by joining a cone-shaped upper main body and a lower main body that are opposed to each other, and a plurality of through holes are formed in the upper main body to allow fire water to flow into the hollow portion so that the valve flap can work sensitively. In order to reduce the resistance when the fire water in the primary side main pipeline passes through, the support ring is formed as a support rod with a V-shaped cross-section.

Furthermore, the characteristic of the paddle switch is that the front end of the paddle which is arranged to penetrate the side wall of the primary side main pipeline is located on the back side of the valve disc, and a setting adjustment pin which contacts the back side of the valve disc is arranged at the front end of the paddle in a manner that can be adjusted in height, thereby facilitating the setting adjustment of the fire signal sending switch.

The present invention has the following effects: the valve disc that vertically lifts and lowers in the valve housing contacts and seals the inner peripheral opening edge of the seat ring as a whole when descending, so that the sealing pressure acts on the seat ring in a balanced manner, and there is no need to worry about water leakage, thereby preventing erroneous operation of the alarm valve.

Furthermore, the back of the valve disc is cone-shaped, so it can significantly reduce the resistance when supplying fire water. In addition, when the valve disc contacts the seat ring, the cone-shaped back of the valve disc contacts the sealing ring line embedded in the inclined surface of the seat ring, thereby increasing the sealing force of the valve disc.

In addition, the gap between the paddle and the valve disc can be easily adjusted, so the setting adjustment of the fire signal transmission switch can be easily and accurately performed.

Hereinafter, the alarm valve of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The terms and words used in the present invention described below should not be interpreted as limited to the meanings in the past or dictionaries. The embodiments described in this specification and the structures shown in the attached drawings are merely preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modifications that can replace the above technical ideas can be implemented at the time of submitting this application.

1a and 1b are top views of the alarm valve of the present invention, and respectively show the closed state (normal state) and the open state (working state) of the valve flap 140.

The feature of the present invention is that when the supply of fire water starts due to a fire, in order to automatically notify the control panel, a valve housing 100, a seat ring 110, a support ring 120, a guide pin 130, a vertically lifting valve disc 140, an elastic member 160, and a dial switch 200 with an easy adjustment of the dial 210 and a circular structure alarm valve are used to constitute an alarm valve with the dial switch 200 installed on one side.

In the valve housing 100 , a valve disc working space 103 is formed with a predetermined size between the primary-side main pipe 101 and the secondary-side branch pipe 102 so as not to interfere with the valve disc 140 and for vertically performing lifting and lowering operations.

The seat ring 110 is screwed with the inner peripheral surface of the primary-side main pipe 101 and serves as an outlet for fire-fighting water of the primary-side main pipe 101 .

The support ring 120 is threadedly engaged with the inner circumferential surface of the secondary-side manifold 102 , and a pin hole into which one end of a guide pin 130 is fitted is formed at the center of a support rod 121 that crosses the support ring 120 .

The guide pin 130 is formed in a long rod shape, one end of which is engaged and fixed in the pin hole of the support rod 121 of the support ring 120, and the other end is vertically arranged in the valve disc working space 103.

The valve disc 140 is vertically lifted and lowered in a state where the guide pin 130 is slidably inserted into a guide hole 141 formed in the center of the upper surface, and opens and closes the primary side main passage 101 through contact and non-contact with the seat ring 110 .

Preferably, the elastic member 160 is composed of a coil spring, which is compressed when the valve disc 140 rises, and is assembled to the guide pin 130 in a manner of applying tension to maintain the closing force of the valve disc 140 when the valve disc 140 descends.

In such an alarm valve of the present invention, when the pressures of the fire water in the primary side main line 101 and the fire water in the secondary side manifold line 102 are the same as each other, as shown in FIG. 1a, under the action of the tension of the elastic member 160, the valve disc 140 is in a state of vertically descending along the guide pin 130, so that the back side of the valve disc 140 is in close contact with the inner peripheral opening edge of the seat ring 110 as a whole at the same time.

In this way, when the back side of the valve disc 140 is in close contact with the entire inner peripheral opening edge of the seat ring 110 at the same time, a uniform sealing pressure is generated, so there is no need to worry about water leakage compared to the valve disc that rotates around the hinge part as the center of the previous one.

Furthermore, since fire water is sprayed through the sprinkler connected to the secondary side manifold 102 due to a fire, when the pressure of the fire water in the secondary side manifold 102 is lower than the pressure of the fire water in the primary side main pipe 101, as shown in FIG. 1b, the valve flap 140 rapidly rises vertically while compressing the elastic member 160 along the guide pin 130, that is, the back side of the valve flap 140 simultaneously leaves the inner peripheral opening edge of the seat ring 110, so that the primary side main pipe 101 is opened.

As a result, the firefighting water in the primary-side main pipe 101 can be quickly supplied to the secondary-side manifold 102 as quickly as possible, so that the initial suppression of the fire can be performed very efficiently in a race against time.

In the present invention, the valve disc 140 is preferably formed into a cone shape at the back surface contacting the seat ring 110. Therefore, during operation, the resistance of the fire water supplied from the primary side main pipeline 101 to the secondary side manifold pipeline 102 hitting the back surface of the valve disc 140 can be significantly reduced and the rapid flow can be guided, thereby realizing the rapid supply of fire water.

Furthermore, the seat ring 110 is preferably a sealing ring 111 made of rubber material embedded in the inner circumferential opening edge that contacts the back side of the valve disc 140.

That is, as shown in FIG4a, a sealing ring 111 of rubber material can be formed by bending the inclined surface of the inner peripheral opening edge of the seat ring 110 into a circle, or as shown in FIG4b, a sealing ring 111 of rubber material can be formed by bending the stepped inner peripheral surface of the inner peripheral opening edge of the seat ring 110 into a circle.

Therefore, preferably, since the back side of the valve disc 140 is in line contact with the sealing ring 111, the sealing force is improved, and further, the replacement operation of only the sealing ring 111 can be easily performed as needed.

3a and 3b are a top view and a longitudinal sectional view showing a first embodiment of the valve flap 140, and FIGS. 3c and 3d are a top view and a longitudinal sectional view showing a second embodiment of the valve flap 140. FIG.

As shown in FIG. 3 a and FIG. 3 b , the valve disc 140 of the first embodiment is formed into a hollow cone shape which is opposed to each other in the upper and lower parts, and the back surface of the cone is in line contact with the sealing ring 111 of the seat ring 110 .

As shown in Fig. 1a, such a valve disc 140 can directly contact the sealing ring 111 of the seat ring 110. However, if the valve disc 140 is not precisely processed when being manufactured into a cone shape, the contact surface with the sealing ring 111 of the seat ring 110 is uneven, so there is a concern that a gap will be generated when contacting the sealing ring 111 of the seat ring 110.

Therefore, like the valve flap 140 of the second embodiment shown in Figures 3c and 3d, it is preferred that the peripheral portion of the valve flap 140 in line contact with the sealing ring 111 has a structure in which a valve flap ring 143 precisely machined from a metal material is embedded in the peripheral portion of the valve flap 140 and is fastened and fixed by a cover portion 144 having an internal thread.

Therefore, the valve ring 143 can be easily disassembled and assembled by tightening and releasing the cover 144, so the exchange operation is easy. In addition, such a valve ring 143 is easy to perform precision processing, so when it contacts the sealing ring 111 of the seat ring 110, the tight contact force is good and there is no need to worry about the generation of gaps. It can have good line contact with the sealing ring 111, so the sealing force is increased.

Furthermore, preferably, when the valve ring 143 is externally embedded in the periphery of the valve 140, a plurality of O-rings are interposed between the periphery of the valve 140 and the valve ring 143. Thus, the gap generated at the contact surface between the periphery of the valve 140 and the valve ring 143 can be well sealed by the plurality of O-rings.

In addition, similar to the first and second embodiments, the valve flap 140 is preferably formed by joining the opposing conical upper main body 140a and the lower main body 140b to form a hollow portion 140c with a hollow interior, and a plurality of through holes 142 are formed in the upper main body 140a to allow fire water to flow into the hollow portion 140c.

Therefore, in addition to the reduction in the weight of the valve flap 140 itself, the fire water in the secondary side manifold 102 flows into and fills the hollow portion 140c through the through hole 142, so that the valve flap 140 can work very sensitively when a fire occurs, thereby achieving rapid operation.

FIG5a is a top view showing the structure of the support ring 120, and FIG5b is a cross-sectional view taken along line A-A of FIG5a.

Preferably, the support ring 120 threadedly engaged with the inner circumferential surface of the secondary side manifold 102 is formed as shown in Figure 5b, and the support rod 121 having a pin hole for fitting one end of the guide pin 130 is formed to have a V-shaped cross-section with a narrower width of the lower surface than the width of the upper surface.

Therefore, the pressure resistance of the fire-fighting water that collides with the support rod 121 when the fire-fighting water in the primary-side main pipe 101 flows toward the secondary-side manifold 102 due to the opening of the valve disc 140 can be reduced to the maximum, thereby achieving smooth supply of fire-fighting water.

Furthermore, the paddle switch 200 is characterized in that, for the purpose of setting and adjusting the paddle 210, a front end portion 211 of the paddle 210 inserted through the side wall of the primary side main passage 101 is located on the back side of the valve disc 140, as shown in FIGS. 1a, 1b and 2, and a setting adjustment pin 220 is provided at the front end portion 211 of the paddle 210 so as to contact the back side of the valve disc 140 by screwing or by a multi-stage height adjustment method.

As described above, if the height of the setting adjustment pin 220 in contact with the back surface of the valve disc 140 can be adjusted, the setting adjustment of the fire signal transmission switch can be performed very easily, so that a signal when a fire occurs can be transmitted as early as possible to achieve rapid fire suppression.

As mentioned above, the invention accomplished by the inventors has been specifically described based on the embodiments, but the present invention is not limited to the embodiments, and it can be said that various modifications can be made within the scope of the gist thereof, which is obvious to those having ordinary knowledge in the technical field.

100: Valve housing 101: Primary side main pipe 102: Secondary side manifold 103: Valve disc working space 110: Seat ring 120: Support ring 121: Support rod 130: Guide pin 140: Valve disc 140a: Upper body 140b: Lower body 140c: Hollow part 141: Guide hole 142: Through hole 143: Valve disc ring 144: Cover 160: Elastic member 200: Dial switch 210: Dial 211: Front end 220: Setting adjustment pin

Fig. 1a and Fig. 1b are top views of the alarm valve of the present invention, respectively showing the closed state and the open state of the valve disc.

FIG. 2 is a top view showing another embodiment of the alarm valve of the present invention, and shows the open state of the valve disc.

3a and 3b are a top view and a longitudinal sectional view showing a first embodiment of the valve flap, and FIGS. 3c and 3d are a top view and a longitudinal sectional view showing a second embodiment of the valve flap.

FIG. 4a and FIG. 4b are longitudinal sectional views showing seat rings having different structures.

Fig. 5a is a top view showing the structure of the support ring, and Fig. 5b is a cross-sectional view taken along line A-A of Fig. 5a.

100: Valve housing

101: Primary side main road

102: Secondary side manifold

103: Valve working space

110: Seat ring

120: Support ring

140: Valve

140a: Upper body

140b: Lower body

140c: Hollow part

141:Guide hole

142:Through hole

160: Elastic components

200: Dial switch

210: Patch

211: Front end

220: Set the adjustment pin

Claims (6)

An alarm valve is provided. When a fire occurs and fire water is supplied, a paddle switch is installed on one side to automatically notify a control panel. The alarm valve is characterized in that the alarm valve comprises: a valve housing (100), a valve disc working space (103) of a predetermined size is formed between a primary side main pipe (101) and a secondary side branch pipe (102); a seat ring (1 10), which is disposed on the inner circumference of the primary side main pipe (101) as an outlet for fire water; a support ring (120), which is disposed on the inner circumference of the secondary side manifold pipe (102), and a pin hole is formed in the center of a support rod (121); a guide pin (130), one end of which is engaged and fixed in the pin hole of the support ring (120), and the other end of which is vertically disposed toward the seat ring (110); a valve disc (1 40), vertically ascending and descending along the guide pin (130) which is slidably inserted into a guide hole (141) formed in the center of the upper surface, and opening and closing the primary side main pipe (101) by contact and non-contact with the seat ring (110); and an elastic member (160) which is compressed when the valve disc (140) ascends and exerts tension when the valve disc (140) descends. The valve flap (140) is assembled on the guide pin (130) to maintain the sealing force of the valve flap (140). The valve flap (140) connects an upper main body (140a) and a lower main body (140b) facing each other to form a hollow part (140c) inside. A plurality of through holes (142) are formed in the upper main body (140a) to allow fire water to flow into the hollow part (140c). According to the alarm valve described in claim 1, the back surface of the valve disc (140) in contact with the seat ring (110) is formed into a cone shape so as to reduce the resistance when the fire water in the primary side main pipe (101) flows toward the secondary side manifold (102). According to the alarm valve described in claim 1, in the seat ring (110), a sealing ring (111) made of rubber material with a surface bent into a circular shape is embedded on the inclined surface of the inner peripheral opening edge in contact with the valve disc (140), and when the valve disc (140) descends, the back of the valve disc (140) is in direct line contact with the sealing ring (111), thereby increasing the sealing force. According to the alarm valve described in claim 3, a valve ring (143) made of metal material is embedded in the peripheral portion of the valve disc (140) that is in line contact with the sealing ring (111), and when the valve disc (140) descends, the sealing force is increased by the line contact between the sealing ring (111) and the valve ring (143). According to the alarm valve of claim 1, the support rod (121) of the support ring (120) is formed to have a V-shaped cross section with a narrower width of the lower surface than the width of the upper surface of the support rod (121) in order to reduce the resistance of the fire water of the primary side main pipe (101) when passing through. According to the alarm valve described in claim 1, in the paddle switch (200), a front end portion (211) of a paddle (210) inserted through the side wall of the primary side main pipe (101) is located on the back side of the valve disc (140), and a setting adjustment pin (220) in contact with the back side of the valve disc (140) is provided at the front end portion (211) of the paddle (210) in a manner capable of height adjustment, thereby facilitating the setting adjustment of the fire signal transmission switch.