JPS6110181A - Compound valve - Google Patents

Abstract

PURPOSE:To operate a valve body using its own resources by action of a fluid in a pipeline by providing a valve connected to the suction side of a pump. CONSTITUTION:When the discharge side of a pump reaches a designated pressure, a pressure switch 7 is turned on, so that an electric current is applied to a solenoid valve 6 to be opened. A cylinder chamber 32 is connected to low-pressure suction side of a pump through a pilot tube 4, so that a fluid in the cylinder chamber 32 flows out to the pump suction side. Thus, the pressure in the cylinder chamber 32 is lowered below the pressure of an outflow chamber 18. A valve body 33 is separated from a valve seat 22 by pressing force from the outflow chamber 18 side to open a valve port 21, and when a piston portion 37 contacts the upper wall 10b of a valve casing, the valve port is fully opened.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention operates in a self-cutting manner by the action of the fluid in the direction of the pipe, and has the functions of both a normal gate valve and a check valve with one valve. This invention relates to a composite valve used as a valve.

((re-coming technology) Conventionally, as a device similar to the above-mentioned compound valve, Japanese Patent Application Laid-open No. 58-
A compound valve (compound/zeta-tough fly check valve) described in Japanese Patent No. 28060 is known, and it consists of a cylinder connected to a valve shaft, a solenoid valve for switching fluid pressure supplied to the cylinder, and It includes a logic valve, a reverse valve for locking the fluid pressure circuit, and a throttle valve for setting the valve operation time, and is equipped with a drive control device for controlling the valve body, and the drive control device controls the drive control when opening and closing the valve body. The device is designed to drive and control the valve body. However, the problem mentioned above is that the drive control device is required to open and close the valve body, so the valve is large enough to require this drive control device. There are problems in that it is complicated to operate and cannot be operated without a power source.

(Title) Therefore, the present invention does not require the drive control device as described above, and operates the valve body by itself by the action of the fluid in the direction of the pipe.
The technical challenge is to make it possible to open and close it.

(Technical means) The technical means taken to achieve the above technical problem are:
A valve installed on the discharge side of a pump installed in a fluid pipeline and having an on-off valve [7, one end of which opens on the suction side of the pump and which is connected to the suction side with a ξIlot pipe, A pair of horizontal partitions, each having a valve box having an inlet connected to the discharge side of two pumps on one side and an outlet on the other side, the inside of the valve box being fixed to the inner wall of the valve box at a predetermined interval in the vertical direction. A cylinder chamber is partitioned from above into a cylinder chamber, an inflow chamber with an inflow port, and an outflow chamber with an outflow port, and a valve port is formed in the lower blade partition wall, and a needle with a tapered tip ξ is connected to the valve. The valve body is erected on the bottom wall of the valve box so as to protrude from the opening, has a needle hole at the lower end into which the needle is inserted, and has a hollow cylindrical valve body with an opening at the upper end for opening and closing the valve opening along the needle and upward. The valve body is arranged so as to be able to move up and down through the partition wall, and has a large diameter piston part at its upper end that slides against the inner peripheral surface of the cylinder chamber, and has a watertight seal on the outer peripheral surface of the piston part.
In addition to providing an R-socket, a watertight groove is provided on the inner circumferential surface of the lower end of the cylinder chamber to make sliding contact with the outer circumferential surface of the valve body, and the other end of the pilot pipe is opened in the upper part of the cylinder chamber. be.

(Function) When the on-off valve is opened after the pump starts operating, the cylinder chamber communicates with the pump suction side, which has a low pressure, via the pilot pipe, and the fluid in the cylinder chamber flows out to the pump suction side. Therefore, the pressure in the cylinder chamber is lower than the pressure in the outflow chamber.

As a result, the pressing force from the outflow chamber side is greater than the pressing force due to the pressure in the cylinder chamber plus the weight of the valve body, and the valve body moves away from the valve seat, opening the valve port and becoming fully open. The fluid that enters from the inlet passes through the inlet chamber, the valve port, and the outlet chamber, and then flows out from the outlet.

Next, when the pump stops operating and the on-off valve is closed, the communication between the cylinder chamber and the pump suction side is cut off, the pressure in the cylinder chamber rises to almost the same pressure as the outflow chamber, and the valve body The valve port is closed and becomes fully open. This prevents backflow even if there is a backflow of fluid from the outlet. Therefore, this valve does not require a conventional drive control device, and the valve body can be operated by its own blade by the action of the pipe-directed fluid to open and close the valve body.

(Specific effect) When the valve body opens the valve port, the gap between the needle hole and the needle increases as the valve body starts to open the valve port and opens it, and the pressure reducing effect due to this gap gradually decreases, reducing the Since the pressure gradually increases and the differential pressure with the outflow chamber side gradually decreases, the opening speed gradually decreases, so the valve body slowly stops in the fully opened state, so there is no impact. On the other hand, when closing the valve port, the gap between the needle hole and the needle becomes smaller as the valve body starts to close the valve port and then closes the valve port, and the amount of liquid sent from the cylinder chamber to the outflow chamber side gradually decreases, so the closing speed is As it closes, it slows down and the valve body slowly stops in the fully closed state, so there is no damage caused by water leakage caused by sudden closing of the valve body.

(Example) The present invention will be described in detail below.

Fig. 1 shows a schematic plan view of the embodiment, in which numeral 1 is a compound valve, 2 is a pump, 3 is a fluid line, 4 is a pilot pipe, 5 is a flow rate regulating valve, and 6 is opened at 11°C. magnetic valve,
7 is ON when the pressure on the discharge side of pump 2 reaches the specified pressure.
8ii shows a switch that is turned off by the electric signal to stop Ponzo 2.

The composite valve 1 has a structure as shown in FIG. 2, and includes a valve box l having an inlet 11 on one side and an outlet 12 on the other side.
O, and is installed in the fluid pipeline 3 by connecting the inlet 11 of the valve box 10 to the upstream pipeline 3& (discharge side of the pump) and connecting the outlet 12 to the downstream pipeline 3b. . Inside the valve box IO, a pair of lateral partition walls 14 and 15 are fixed to the inner wall of the valve box at a predetermined distance in the vertical direction to form a communication chamber 16 from above, an inlet chamber 17 having an inlet 11, and an outlet chamber having an outlet 12. It is divided into 18 sections. The upper partition wall 14 is provided with an opening 20 that is larger than the outer diameter of the main body of the valve body described later and smaller than the outer diameter of the piston portion. A valve port 21 is bored in the lower partition wall 15, and a valve seat 22 is formed at the upper edge of the valve port 21. In addition, the valve port 21
A needle 23 whose tip protrudes from the valve port 21 into the inflow chamber 17 and has a tapered shape in the direction of the tip is screwed into a support member 24 fixed to the bottom wall of the valve box io. The needle 23f'i is fixed by a nut 25, and by loosening the nut 25 and rotating the corner part 26, the protrusion amount can be adjusted to 61F4. . 27.28 is a spear-like nogutsukin.

Inside the communication chamber 16 of the valve box 10, a cylinder 30 having outwardly directed annular plates at its upper and lower ends is installed with an annular space 31 formed between the inner walls of the communication chamber 16. A valve body 33 is disposed between the cylinder chamber 32 of the cylinder 30 and the inflow chamber 17 via the opening 20 so as to be freely movable up and down. Valve body 33
The outer diameter is almost the same as the valve seat 22, and there are openings at the upper and lower ends 34.35
This main body 3 has a hollow cylindrical body 36 with a hole therein.
A large-diameter piston portion 37 that slides on the inner circumferential surface of the KFi cylinder chamber 32 is integrally connected to the upper end of the cylinder chamber 32 . Main body 3
A valve seat mounting member 39 is fixed to the lower end of the valve seat 6 via an annular packing 38, and a guide mounting member 40 is fixed to the lower surface of the valve seat mounting member 39. The valve seat mounting member 39 has a needle hole 42 in the center, and a valve seat 43 that closely contacts the valve seat 22 is mounted on the lower surface. On the other hand, the guide mounting member 40 has a needle hole 42 and υ
It has a large through hole 44, and a guide 45 is provided on the lower surface along the inner surface of the valve seat 22.

Reference numeral 47 denotes a current packing whose inner circumferential end is in sliding contact with the outer circumferential surface of the main body 36 of the valve body 33, and the outer circumferential end of the packing 47 is held between the upper partition wall 14 via the .xi. The lower end annular plate of the cylinder 30 is placed in contact with the upper surface of the presser foot 48, which is fixed to the inner wall of the box. Reference numeral 50 is an annular six-piece seal whose outer circumferential surface is in sliding contact with the inner circumferential surface of the cylinder chamber 32;
The outer circumferential surface of the main body 36 of the valve body 33 is disposed in an annular groove 51 formed on the outer circumferential surface of the valve body 33, and
A chamber 52 formed by one side surface of the piston portion 37 on the side of the gasket 47 and the inner surface E of the cylinder 30 is kept watertight with the cylinder chamber 32 and the inflow chamber J7. +il of the lower end wall of the cylinder 3() and the valve box 10 where the communication chamber 16 is located.
1'n air holes 53, 54 (which connect the chamber 52 and the outside air via the fall space 31) are bored in the l+ wall. J
) A communication hole 57 is drilled in the earth wall job with v attached,
This '8 through hole 57 has the flow rate adjustment valve 5 and the electric valve 6, and one end is open to the suction side of the pump 2. The other end of the Ilot tube 4 is in contact with R4t, σ) connected to R4t.

Next, the operation of the above embodiment will be explained. Pump ゛2・＋
When the pump discharge side reaches a predetermined pressure, the solenoid valve 6 is not connected to the solenoid valve 6, and the solenoid valve (i) is closed. On the other hand, the cylinder chamber 32t
It communicates with the outflow chamber 18 through the gap between the needle hole 42 and the needle 23.
! ``Although the same pressure is acting, the pressing force acting on the valve body 33 is greater from the cylinder chamber 32 side, where the piston part 37 with a large diameter and large pressure-receiving area is located, than from the outflow chamber 18 side. Since the dead weight of the valve body 33 is added to this, the valve body 33 is pressed against the valve seat 22 (if there is no liquid in the outflow chamber 18, only the dead weight of the valve body 33 acts as a pressure on the valve seat 22), The valve port 21 is closed (solid line state in FIG. 2).

When the pump discharge side reaches a predetermined pressure, the pressure switch 7 turns O.
N, the 'α solenoid valve is energized by the electric signal and opens. When the solenoid valve 6 opens, the cylinder chamber 32 communicates with the pump suction side, which has a lower pressure than the cylinder chamber 32, via the slotted tube 4, and the fluid in the cylinder chamber 32 flows out to the pump suction side, so that the cylinder The pressure in chamber 32 is
8 pressure. Like this, cylinder chamber 32
The valve body 33 is affected by the pressure exerted on the valve body 33 at
The pressing force from the outflow chamber 18 side is muscular force, and the valve body 33 separates from the valve seat 22 to open the valve port 21, and the piston part 37 moves as shown by the chain line in FIG. When it comes into contact with the upper wall 10b of the valve box, it becomes fully open. At this time, outside air is introduced into the chamber 52 from the ventilation hole 54 through the annular space 31 and the ventilation hole 53 . As described above, the fluid entering from the inflow Lit 11 passes through the inflow chamber 17, the valve port 21, the outflow chamber 18, and then flows out from the outflow port 12. Since the electromagnetic valve 6 is energized during pump operation, the above state is maintained.

Next, when the pump 2 is stopped by an electric signal for stopping the pump, the switch 8 is turned off by the signal, and the electromagnetic valve 6 is de-energized and closed. When the first magnetic valve 6 closes, the communication between the cylinder chamber 32 and the pump suction side is cut off, the pressure in the cylinder chamber 32 rises to almost the same pressure as the outflow chamber 18 side, and the valve body 33 closes at the valve port. 21 is closed, and the fully closed state shown by the solid line in FIG. 2 is achieved again. At this time, the air in the corpse chamber 52 is gradually exhausted to the outside through the ventilation hole 53, the annular space 31, and the ventilation hole 54.

When a power outage occurs in the above case, the pump 2 comes to a stopped state almost simultaneously with the closing of the solenoid valve 6, but in this case as well, the valve body 33 closes the valve port 21 in the same manner as described above.

In addition, in the above, the opening operation time from when the valve body 33 begins to open the valve port 21 until it becomes fully open, and the closing operation time from when the valve body 33 begins to close the valve port 21 until it reaches the fully open state, and the pump 2 and It can be optimized according to the load situation on the downstream side. In other words, the opening operation time is determined by the amount of protrusion of the needle 23, i! You can increase the opening of the flow rate regulating valve 5 for a short time, reduce the opening for a long time, or leave the flow rate regulating valve 5 as it is and increase the protrusion of the needle 23 for a short time. In addition, the protrusion amount t- can be made small and the length of time can be increased. Further, the closing operation time can be shortened by reducing the amount of protrusion of the needle 23, or can be made longer by increasing the amount of protrusion. As mentioned above, the opening and closing operation times can be adjusted in various ways, but normally the opening operation time can be adjusted by adjusting the flow rate regulating valve 5, and the closing operation time can be adjusted by adjusting the protrusion amount of the needle 26.

In the embodiment described above, the pressure switch 7 is used, but instead of this, a time switch 1. You can. Also,
In the embodiment described above, the solenoid valve 6, the pressure switch 7, etc. are provided, and the valve body 33 is opened and closed by electrical control. However, the present invention is not limited to this, and the solenoid valve 6 can be opened and closed by manual operation. It goes without saying that the same operation can be performed as an on-off valve.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an embodiment of the present invention;
The figure is a longitudinal sectional front view of the main parts same as above. 1...Complex valve 2...Pump 3...Fluid pipe line 4...Pilot pipe 5...Flow rate adjustment valve 6...Solenoid valve 7...Pressure switch
8...Switch 1 (+...Valve box 1
1... Inlet 12... Outlet 14.15
...Partition wall 16...Communication chamber 17...
Inflow chamber 18...Outflow chamber 21...Valve port 22
...Valentine seat 23...21 dollars 30...
Cylinder 31... Annular space: 32... Cylinder chamber 33... Valve body 36... Main body
37... Piston part 4゛...:: One dollar hole
47.50...Annular ξtsukin r+2...^<
53.54...Vent hole [17...
Communication hole wholesale (g), j8

Claims (1)

[Claims] 1. Installed on the discharge side of the pump installed in the fluid pipeline,
The valve has an on-off valve, one end of which is connected to the suction side by a pilot pipe opened to the suction side of the pump, an inlet connected to the discharge side of the pump on one side, and an outlet connected to the other side. A cylinder chamber, an inlet chamber having an inlet, and an outlet are connected from above by a pair of horizontal partition walls fixed to the inner wall of the valve box at a predetermined interval in the vertical direction. A valve opening is formed in the lower partition wall, and a needle tapered toward the distal end is erected on the bottom wall of the valve box so as to protrude from the valve opening, and the needle is inserted and inserted into the valve box. along the needle, a hollow cylindrical valve body having a needle hole at the lower end and an opening at the upper end for opening and closing the valve port;
The valve body is disposed vertically movably through the upper partition wall, and has a large-diameter piston part at the upper end that slides into contact with the inner circumferential surface of the cylinder chamber, and the outer circumferential surface of the piston part is watertight. A compound valve characterized in that a packing is provided, a watertight packing is provided on the inner circumferential surface of the lower end of the cylinder chamber in sliding contact with the outer circumferential surface of the valve body, and the other end of the pilot pipe is opened at the upper part of the cylinder chamber.