JP3717017B2 - Highly compressible transport pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention particularly belongs to the technical field of a transfer pump for transferring a highly compressible transfer product such as a residue generated in a sewage treatment plant, for example.
[0002]
[Prior art]
Conventionally, various types of residue such as garbage flow along with the sewage through the sewer pipe. In the sewage treatment plant, these residues are removed from the collected sewage.
[0003]
By the way, since the residue removed from the sewage or the like cannot be left untreated, it is treated at a treatment facility in the sewage treatment plant. In order to process the residue in the processing facility in this way, it is necessary to transport the residue to the processing facility by a predetermined distance. Pipe transportation by a pump is conceivable as means for transporting the residue from a predetermined distance.
[0004]
[Problems to be solved by the invention]
However, such a residue is not only highly compressible but also has low fluidity, so it is very difficult to simply carry out pipe transportation by a pump. For this reason, conventionally, the residue has been manually transported to a processing facility using a vehicle such as a conveyor or a truck, but efficient transport has not been performed.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to enable conveyance of a conveyance object having high compressibility and low fluidity such as residue by pipe transportation using a pump. Thus, it is an object of the present invention to provide a transport pump for a highly compressible transported object that can transport a highly compressible transported object easily, reliably and efficiently.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 is a conveyance object introduction chamber into which a highly compressible conveyance object is introduced through a suction port, a conveyance cylinder provided in communication with the conveyance object introduction chamber, A transfer piston which is provided so as to be fitted into the transfer cylinder, and which compresses the highly compressible transfer object introduced into the transfer object introduction chamber by pushing it into the transfer cylinder, and a piston operation control for controlling the operation of the transfer piston. A suction port valve provided in the vicinity of the suction port and controlled to be opened and closed; a suction port valve operation control means for controlling the operation of the suction port valve; and provided at a discharge port of the transfer cylinder and controlled for opening and closing. A discharge port valve, discharge port valve operation control means for controlling the operation of the discharge port valve, and a compressed and highly compressible carrier that is connected to the discharge port valve and discharged from the discharge port valve. A transport pipe for transporting an object; a detection means for detecting a stroke position of the transfer piston or an operation position of the piston operation control means; and a stroke position of the transfer piston detected by the detection means or the piston operation control means. A control device that controls the opening and closing of the suction port valve and the discharge port valve by controlling the operation of the suction port valve operation control unit and the discharge port valve operation control unit according to the operation position of the suction port valve. It is a feature.
[0007]
The invention according to claim 2 is characterized in that a forward limit position, a backward limit position, and a push-in compression completion position are set as the stroke position of the transfer piston or the operation position of the piston operation control means.
[0008]
Further, the invention according to claim 3 is characterized in that the indentation compression completion position can be set and changed depending on the type of the highly compressible conveyed product.
[0009]
[Action]
In the transport pump for highly compressible transported material of the present invention configured as described above, the control device opens and closes the suction port valve and the discharge port valve according to the stroke position of the transport piston or the operation position of the piston operation control means. To be controlled.
[0010]
Therefore, the suction valve is set to open and the discharge valve is closed according to the position of the transport piston when the suction of the highly compressible transport starts. be introduced. In addition, at the start of indentation compression of a highly compressible transported material introduced into the transported material introduction chamber, both the suction port valve and the discharge valve are controlled to be closed according to the position of the transport piston, thereby transporting the highly compressible transported material. The object is reliably pushed into the transport cylinder and compressed to a predetermined degree of compression. Furthermore, at the start of extrusion of a highly compressible transported material that has been pushed into the transport cylinder and compressed, the suction port valve is closed and the discharge valve is set to open depending on the position of the transport piston. The conveyed product is effectively pushed out from the discharge valve to the transport pipe.
[0011]
By repeating such suction, indentation compression, and extrusion, the highly compressible conveyed product is compressed to a predetermined degree of compression and sequentially pushed out from the discharge port valve to the transport pipe. Furthermore, the highly compressible conveyed product pushed out to the transport pipe is transported to the treatment site through the transport pipe by being pushed by the highly compressible conveyed product extruded later.
[0012]
In this way, a high-compressible and low-fluid transported material can be transported easily, reliably and efficiently by pumping and pipe transportation.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view schematically showing an example of an embodiment in which a highly compressible transported material transport pump according to the present invention is applied to a residue transport pump.
[0014]
As shown in FIG. 1, the residue transporting pump 1 of this example is constituted by a single piston plunger type reciprocating pump. This residue transporting pump 1 is provided with a residue introduction chamber 2 and a transportation cylinder 3 extending leftward from the residue introduction chamber 2 in FIG. Further, the transfer piston 4 is slidably fitted into the transfer cylinder 3 through the residue introduction chamber 2. The transfer cylinder 3 is controlled by an operation control cylinder 5 driven by a working fluid.
[0015]
The passage connected to the suction port at the top of the residue introduction chamber 2 is provided with a suction port valve 6 for opening and closing the passage. The suction port valve 6 is operated by a valve operation control cylinder 7 driven by a working fluid. The operation is controlled. Further, a discharge port 8 for opening and closing the discharge port of the transfer cylinder 3 is provided at the discharge port at the left end of the transfer cylinder 3, and the discharge port valve 8 is a valve operation control cylinder 9 driven by a working fluid. The operation is controlled by. A transport pipe 10 is connected to the discharge port valve 8, and the transport pipe 10 is laid to the conveyance place. Further, a hopper 11 that guides and introduces the residue into the residue introduction chamber 2 is provided above the passage in which the inlet valve 6 is provided.
[0016]
By the way, the residue transporting process by the residue transporting pump of this example includes a residue sucking step, a residue pushing and compressing step, and a residue pushing process. These steps include the stroke control of the transfer piston 4, that is, the operation control of the operation control cylinder 5, the opening / closing control of the suction port valve 6 and the discharge port valve 8, that is, the operation control of both valve operation control cylinders 7 and 9. However, the operation is controlled in association with each other by an electronic control device such as a microcomputer (not shown).
[0017]
This related control is performed according to the stroke position of the transfer piston. Therefore, in the residue transfer pump 1 of this example, the backward limit position a, the indentation compression completion position b, and the forward limit position c of the transfer piston 4 are set. Is set. In that case, the indentation compression completion position b can be set at an arbitrary position according to the compressibility, non-compressibility or degree of compression of the conveyed product to be conveyed. The detection that the front end of the transfer piston 4 has reached these positions a, b, and c is performed by a detection means such as a conventionally known proximity switch (not shown).
[0018]
Next, the control related to the stroke control of the transfer piston 4 and the opening / closing control of the suction port valve 6 and the discharge port valve 8 will be described more specifically with reference to FIG.
[0019]
First, the suction step is a step of introducing, for example, the residue stored in the hopper 10 into the residue introduction chamber 2 by moving the transport piston 4 backward. As shown in FIG. 2 (1), in this suction step, the tip of the transfer piston 4 is moved backward from the forward limit position c where the discharge of the residue is finished to the backward limit position a. The backward stroke of the transfer piston 4 is performed by the electronic control device controlling the supply and discharge of the working fluid to and from the operation control cylinder 5. In this suction step, the suction port valve 6 is set to open and the discharge port valve 8 is set to close. These valves 6 and 8 are set to open and close by controlling the supply and discharge of the working fluid to and from the valve operation control cylinder 7 of the suction port valve 6 by the electronic control unit, and to the valve operation control cylinder 9 of the discharge port valve 8. This is done by supplying and discharging the working fluid.
[0020]
As the transport piston 4 is retracted, the residue from the hopper 11 is introduced into the residue introduction chamber 2 through the suction port valve 6 due to the suction due to the retraction of the transport piston 4 and the dead weight of the residue. Further, by setting the discharge port valve 8 to be closed, the residue pushed out to the transport pipe 10 in the previous pushing process of the transport piston 4 is prevented from flowing back into the transport cylinder 3.
[0021]
As shown in FIG. 2B, when the tip of the transfer piston 4 reaches the retreat limit position a, the electronic control unit stops the operation of the operation control piston 5 and stops the retreat direction stroke of the transfer piston 4. Then, the suction process is completed, and the valve operation control cylinder 7 is controlled to close the suction port valve 6. Further, the electronic control unit controls the valve operation control cylinder 9 so that the discharge port valve 8 is kept closed. Thereby, the introduction of the residue from the hopper 11 to the residue introduction chamber 2 is stopped and the residue introduced into the residue introduction chamber 2 is contained.
[0022]
The indentation compression step is a step in which the residue introduced into the residue introduction chamber 2 is pushed into the transfer cylinder 3 and compressed to a predetermined degree of compression by moving the transfer piston 4 forward. As shown in FIG. 2 (3), in this indentation compression process, the front end of the transport piston 4 is moved forward from the retreat limit position a to the indentation compression completion position b. The forward stroke of the transfer piston 4 is performed by controlling the supply and discharge of the working fluid to and from the operation control cylinder 5 by the electronic control device as in the suction process. In this indentation compression process, both the suction port valve 6 and the discharge port valve 8 are set to be closed. The opening / closing setting of these valves 6 and 8 is also performed by controlling the supply and discharge of the working fluid to and from the both valve operation control cylinders 7 and 9 by the electronic control device as in the suction process.
[0023]
As the transfer piston 4 enters the residue introduction chamber 2, the residue is pushed away. However, since both the suction port valve 6 and the discharge port valve 8 are set to be closed, the pushed away residue remains in the hopper 11 and There is no escape toward the transport pipe 10, and most of the transport pipe 10 is transported in the direction of the transport cylinder 3 and effectively compressed.
[0024]
As shown in FIG. 2 (4), when the tip of the transfer piston 4 is fitted into the transfer cylinder 3 and the tip reaches the indentation compression completion position b, the indentation compression process is completed. In this state, the transport cylinder 3 is filled and contained in a state where the residue is compressed. In this case, since the residue does not escape toward the hopper 11, the suction efficiency of the residue into the transport cylinder 3 is increased, and the residue is contained at a high degree of compression, and the degree of compression is also increased.
[0025]
Further, when the tip of the transport cylinder reaches the indentation compression completion position b, the electronic control unit controls the valve operation control cylinder 7 so that the discharge port valve 8 is set to open, and closes the suction port valve 6. Hold on.
[0026]
Further, the extrusion step is a step of pushing out the residue fully filled in the transfer cylinder 3 to the transport pipe 10 through the discharge port valve 8 by further moving the transfer piston 4 forward. As shown in FIG. 2 (5), in this extrusion step, the tip of the transfer piston 4 is further advanced to the forward limit position c. Similarly, the forward stroke of the transfer piston 4 is performed by the electronic control device controlling the operation control cylinder 5. In this extrusion process, the suction port valve 6 is set to be closed and the discharge port valve 8 is set to be open. As the transfer piston 4 enters the transfer cylinder 3, the compressed residue is efficiently pushed out toward the transport pipe 10. The residue pushed out to the transport pipe 10 at the previous time is pushed by the pushed-out residue this time, and is further moved toward the processing site.
[0027]
Then, as shown in FIG. 2 (6), when the leading end of the transfer piston 4 reaches the forward limit position c, the extrusion process is completed. In this state, almost all of the compressed residue in the transport cylinder 3 is pushed out to the transport pipe 10. In that case, since the residue is compressed, the residue is efficiently pushed out to the transport pipe.
[0028]
Further, when the leading end of the transfer piston 4 reaches the forward limit position c, the electronic control unit sets each valve operation control cylinder 7 so that the discharge port valve 8 is set to open and the suction port valve 6 is set to close. , 9 are controlled.
[0029]
The single suction, indentation compression, and extrusion processes of the residue transporting pump 1 are completed. When the extrusion process is completed, the transport piston 4 is retreated again as shown in FIG. 2 (1), and the next suction process is performed. 2 (1) to 2 (6) are repeated, the residue is compressed to a predetermined degree of compression and sequentially sent to the transport pipe 10. Further, this residue is pushed out later into the residue. By being pushed, it is transported to the treatment plant through the transport pipe 10.
[0030]
In this way, the residue with high compressibility and low fluidity can be transported easily, reliably and efficiently by pipe transportation.
[0031]
Note that, instead of the stroke position of the transfer piston 4, the suction valve 6 and the discharge valve 6 are controlled according to the piston retreat limit position, the pushing compression completion position, and the advance limit position c of the operation control cylinder 5 that controls the operation of the transfer piston 4. It is also possible to perform opening / closing control of the outlet valve 8.
[0032]
Further, the operation control means for controlling the operation of the transfer piston 4 is not limited to the operation control cylinder 5 by the working fluid, but the operation of the transfer piston 4 can also be controlled by, for example, electromagnetic force of a solenoid.
[0033]
【The invention's effect】
As is clear from the above description, according to the highly compressible transported material transport pump of the present invention, the suction valve and the discharge valve are opened and closed according to the stroke position of the transport piston or the operation position of the piston operation control means. Therefore, the suction, indentation compression, and extrusion processes can be easily performed. Then, by repeating these steps, a highly compressible and low fluidity conveyed product is compressed to a predetermined degree of compression and sequentially pushed out to the transport pipe connected to the inlet valve, thereby passing through the transport pipe. Therefore, it can be transported to the treatment plant easily, reliably and efficiently.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing an example of an embodiment in which a highly compressible transporting material transport pump according to the present invention is applied to a residue transporting pump.
FIG. 2 is a diagram for explaining control related to stroke control of a transfer piston and opening / closing control of a suction port valve and a discharge port valve in the highly compressible transfer material transfer pump shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sediment transfer pump, 2 ... Sediment introduction chamber, 3 ... Transfer cylinder, 4 ... Transfer piston, 5 ... Operation control cylinder, 6 ... Suction valve, 7 ... Valve operation control cylinder, 8 ... Discharge port valve, 9 ... Valve operation control cylinder, 10 ... Transport pipe, 11 ... Hopper

Claims (3)

A conveyed product introduction chamber into which a highly compressible conveyed product is introduced through a suction port; a conveying cylinder provided in communication with the conveyed product introducing chamber; and a fitting cylinder that can be fitted into the conveying cylinder. The high-compressible transport material introduced into the transport cylinder is pushed into the transport cylinder for compression, the piston operation control means for controlling the transport piston operation, and the suction opening provided near the suction port and controlled to open and close An inlet valve, an inlet valve operation control means for controlling the operation of the inlet valve, an outlet valve provided at the outlet of the transfer cylinder and controlled to open and close, and an outlet valve for controlling the operation of the outlet valve and operation control means, and the transport pipe for transporting highly compressible conveyed compressed is discharged from the discharge port valve is connected to the discharge port valve, the conveying piston Detection means for detecting a stroke position or operating position of the piston operation control means, the inlet valve operation control means in accordance with the operating position of the stroke position or the piston operation control means of the transfer piston which is detected by the detection means And a control device for controlling the opening and closing of the suction port valve and the discharge port valve by controlling the operation of the discharge port valve operation control means.   2. A highly compressible transporting object according to claim 1, wherein a forward limit position, a backward limit position, and an indentation compression completion position are set as a stroke position of the transfer piston or an operation position of the piston operation control means. Transport pump. The push-compression completion position is highly compressible conveyed conveying pump according to claim 2, characterized in that it is a configurable depending on the type of the high compressibility conveyed.

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