CN214998532U

CN214998532U - Hydraulic check valve

Info

Publication number: CN214998532U
Application number: CN202120936359.5U
Authority: CN
Inventors: 房启斌; 李锋; 王敬虎
Original assignee: Shandong Lurun Thermal Power Technology Co ltd
Current assignee: Shandong Lurun Thermal Power Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-03
Anticipated expiration: 2031-04-30

Abstract

The hydraulic check valve comprises a valve body, a valve clack, a spring and a valve rod, wherein the valve body is provided with a water inlet, a water outlet and a water drain opening, the valve clack and the spring are arranged in a flow channel of the valve body, the valve clack is connected with the valve rod, a piston capable of moving up and down is further arranged in the flow channel of the valve body, a through hole for realizing pressure relief or pressure difference balance is formed in the piston, and the piston is connected with the valve shaft through an intermediate adjusting part to drive the valve clack to move. The device firstly adopts a piston and a return spring, and reduces the consumption of water kinetic energy by opening a valve clack by utilizing (static) pressure in a pipeline. The pressure regulating spring can adjust the pressure relief pressure, and the function of installing the safety valve of the water supply pipeline is realized. The balance hole is connected with a water pump inlet pipeline, and pressure difference control between the inlet and the outlet of the water pump can be realized. The valve rod is matched with a handle to realize the manual opening and closing of the valve. The piston is provided with a through hole which is matched with a pressure regulating spring to release pressure or balance pressure difference.

Description

Hydraulic check valve

Technical Field

The utility model relates to a hydraulic pressure technical field, in particular to hydraulic check valve.

Background

The hydraulic non-return device is a novel device which realizes opening and closing by using water (static) pressure of a pipeline, and when the water (static) pressure in the pipeline reaches a set value, a valve is opened; as long as pressure exists in the pipeline, the valve can be kept open until the pressure in the pipeline is smaller than a set value, and the valve can be automatically closed. And integrates the functions of a safety valve, a pressure difference control valve, a shut-off valve and the like. Compared with other check valves, the hydraulic check valve has no pressure loss and better sealing performance, and greatly reduces the loss of hydraulic energy. It is the most ideal non-return equipment in water supply pipe network.

With the increase of newly-built water supply pipe networks, the demand of the water pump is larger and larger, and the application of the check valve which becomes a necessary accessory of the water pump is wider and wider; the current phase check valve principle: the valve clack is acted by the self weight or a return spring to stop the backflow of water; the check valve needs to be opened only by impacting the valve clack with continuous water flow and can continuously consume the kinetic energy of water, so that the existing check valve has large resistance and causes energy waste, and the sealing property is poor when the check valve is closed.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists among the prior art, the utility model provides a brand-new hydraulic pressure non return ware can effectively reduce the emergence of pipe network resistance phenomenon on the basis that does not change the pipe network facility, improves the efficiency of water supply network, reduces check valve's maintenance cost.

The utility model provides a technical scheme that its technical problem adopted is: the hydraulic check valve comprises a valve body, a valve clack, a spring and a valve rod, wherein a water inlet, a water outlet and a water drain opening are formed in the valve body, the valve clack and the spring are arranged in a flow channel of the valve body, the valve clack is connected with the valve rod, a piston capable of moving up and down is further arranged in the flow channel of the valve body, a through hole for realizing pressure relief or pressure difference balance is formed in the piston, and the piston is connected with the valve shaft through an intermediate adjusting part to drive the valve clack to move.

Further, the water inlet is located the same one side of valve body with the outlet, corresponds water inlet and outlet position in the valve body for holding the piston chamber of valve body, and the piston is installed in piston chamber department, and the piston corresponds outlet one side and is equipped with the through-hole.

Furthermore, the upper part of the piston cavity is provided with a balance hole which can realize the control of the pressure difference between the water inlet and the water outlet of the water pump.

Furthermore, the upper part of the piston is connected with one end of a vertical rod, the other end of the vertical rod penetrates through the valve body and is connected with the middle adjusting part, a return spring is sleeved on the vertical rod, and the return spring is positioned in the piston cavity.

Furthermore, the middle adjusting part comprises a prying rod, a pressure adjusting spring and a linkage rod, a pressure adjusting spring mounting upright post is arranged on the outer side of the valve body, a pressure adjusting spring sleeve is arranged on the mounting upright post, one end of the prying rod is sleeved on the mounting upright post and located at the lower part of the pressure adjusting spring, the other end of the prying rod is hinged with one end of the linkage rod, the other end of the linkage rod penetrates through the valve body to be connected with the valve rod and drives the connecting rod to rotate, the connecting rod rotates to drive the valve clack to be opened/closed from the position of the water outlet, and the middle part of the prying rod is hinged with the vertical rod.

Furthermore, the lower extreme and the valve rod meshing of trace are connected, and the trace is located the part in the valve body and is equipped with the stopper, corresponds the stopper in the valve body and is equipped with upper limit board and lower limit board.

Further, the valve rod is provided with a handle which controls a manual switch of the valve rod.

Furthermore, the joints of the vertical rod and the valve body and the joints of the linkage rod and the valve body are provided with seals.

To sum up, the utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

1. the device firstly adopts a piston and a return spring, and reduces the consumption of water kinetic energy by opening a valve clack by utilizing (static) pressure in a pipeline.

2. The pressure regulating spring can adjust the pressure relief pressure, and the function of installing the safety valve of the water supply pipeline is realized.

3. The balance hole is connected with a water pump inlet pipeline, and pressure difference control between the inlet and the outlet of the water pump can be realized.

4. The valve rod is matched with a handle to realize the manual opening and closing of the valve.

5. The piston is provided with a through hole which is matched with a pressure regulating spring to release pressure or balance pressure difference.

Drawings

Fig. 1 is a structural view of a valve clack in a closed state.

Fig. 2 is a structural view after the piston rises and the linkage rod reaches the maximum upper limit position.

Fig. 3 is a structural view of the prying bar after rotating around a linkage rod hinged with the prying bar as a fulcrum.

In the figure:

1. the valve comprises a valve body, 2, a valve rod, 3, a linkage rod, 4, a prying rod, 5, a pressure regulating spring, 6, a return spring, 7, a piston, 8, a through hole, 9, a valve clack, 10, a water inlet, 11, a water discharge opening, 12, a balance hole, 13, a water outlet, 14, a vertical rod, 15, an upright column, 16, a limiting block, 17, an upper limiting plate, 18, a lower limiting plate, 19, a gear, 20, teeth and 21 piston cavities.

Detailed Description

The features and principles of the present invention will be described in detail below with reference to the accompanying drawings, and the illustrated embodiments are only for explaining the present invention, and do not limit the scope of the present invention.

This hydraulic check valve includes valve body 1, valve clack 9, spring and valve rod 2, is equipped with water inlet 10, delivery port 13 and outlet 11 on the valve body 1, and valve clack 9, spring all set up in the runner of valve body 1, and valve clack 9 is connected with valve rod 2. A piston 7 capable of moving up and down is further arranged in a flow channel of the valve body 1, a through hole 8 for realizing pressure relief or pressure difference balance is formed in the piston 7, and the piston 7 is connected with a valve flap 9 through a middle adjusting part and a valve shaft to act.

Specifically, as shown in fig. 1, the water inlet 10 and the water discharge opening 11 are located on the same side of the valve body 1, as shown in fig. 1, the water inlet 10 and the water discharge opening 11 are both located on the left side of the valve body 1, and the water discharge opening 11 is located above the water inlet 10. The position of the corresponding water inlet 10 and the position of the water outlet 11 in the valve body 1 are a piston cavity 21 for accommodating the valve body 1, the piston is arranged at the position of the piston cavity 21, and a through hole 8 is formed in one side of the piston corresponding to the water outlet 11. The bottom of piston is uncovered, and the top shutoff is equipped with through-hole 8 on the lateral wall of piston, and the through-hole corresponds 11 one sides of outlet, and the pipeline internal pressure is greater than (pressure regulating spring 5) set pressure, trompil and 11 parallel and level of outlet on the piston, and the pipeline will carry out the pressure release.

The upper part of the piston cavity 21 is provided with a balance hole 12 which can realize the control of the pressure difference between the inlet and the outlet of the water pump, the balance hole 12 is a through hole, the balance hole 12 is connected with an inlet pipeline of the water pump, and the control of the pressure difference between the inlet and the outlet of the water pump can be realized.

The upper part of the piston is connected with one end of a vertical rod 14, the other end of the vertical rod 14 penetrates through the valve body 1 to be connected with a middle adjusting part, a return spring 6 is sleeved on the vertical rod 14, and the return spring 6 is positioned in a piston cavity 21.

The middle adjusting part comprises a prying rod 4, a pressure adjusting spring 5 and a linkage rod 3. The outer side of the valve body 1 is provided with a pressure regulating spring 5 mounting upright post 15, and the pressure regulating spring 5 is sleeved on the mounting upright post 15. The pressure regulating spring 5 can regulate the pressure relief pressure, and the function of installing a water supply pipeline safety valve is realized. One end of the prying rod 4 is sleeved on the mounting upright post 15 and is positioned at the lower part of the pressure regulating spring 5, the other end of the prying rod 4 is hinged with one end of the linkage rod 3, the other end of the linkage rod 3 penetrates through the valve body 1 to be connected with the valve rod 2 and drives the connecting rod to rotate, the connecting rod rotates to drive the valve clack 9 to be opened/closed from the position of the water outlet 13, and the middle part of the prying rod 4 is hinged with the vertical rod 14. The joint of the vertical rod 14 and the valve body 1 and the joint of the linkage rod 3 and the valve body 1 are provided with seals.

Specifically, the lower end of the linkage rod 3 is engaged with the valve rod 2, and the lower end of the linkage rod 3 is provided with teeth 20 engaged with the gear 19 on the valve rod 2 along the axial direction of the linkage rod 3. Be equipped with valve clack 9 on the valve rod 2, the outer section of valve clack 9 is the smooth arc that corresponds with delivery port 13, drives valve clack 9 and valve rod 2 and rotates simultaneously when valve rod 2 rotates, and then realizes the change of valve clack 9 position, realizes the on-off control that delivery port 13 goes out water.

The part of the linkage rod 3 located in the valve body 1 is provided with a limiting block 16, and an upper limiting plate 17 and a lower limiting plate 18 are arranged in the valve body 1 corresponding to the limiting block 16. The range of the up-and-down position of the trace 3 is limited by the upper limiting plate 17 and the lower limiting plate 18.

The valve rod 2 is provided with a handle which controls the manual switch of the valve rod 2 and can be manually controlled according to specific use conditions or emergency situations.

The utility model discloses a theory of operation does:

the pressure in the pipeline increases, pushes the piston to move upwards, the reset spring 6 is compressed, the prying rod 4 and the linkage rod 3 move upwards together, the linkage rod 3 drives the valve rod 2 to rotate, and the valve clack 9 is opened. After the linkage rod 3 moves upwards to reach the upper limit (the limit block 16 reaches the position of the upper limit plate 17), the prying rod 4 pushes the pressure regulating spring 5 upwards by taking the hinge point of the prying rod 4 and the linkage rod 3 as a fulcrum and the piston as a force point. When the pressure in the pipeline is greater than the set pressure (the pressure regulating spring 5), the through hole in the piston is flush with the water discharge opening 11, and the pipeline is decompressed.

The pressure in the pipeline is reduced, the reset spring 6 extends, the piston moves downwards, the prying rod 4 moves downwards together with the linkage rod 3, the linkage rod 3 drives the valve rod 2 to rotate, and the valve clack 9 is closed.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, which is defined by the appended claims.

Claims

1. The hydraulic check valve comprises a valve body, a valve clack, a spring and a valve rod, wherein a water inlet, a water outlet and a water drain opening are formed in the valve body, the valve clack and the spring are arranged in a flow channel of the valve body, the valve clack is connected with the valve rod, the hydraulic check valve is characterized in that a piston capable of moving up and down is further arranged in the flow channel of the valve body, a through hole for realizing pressure relief or pressure difference balance is formed in the piston, and the piston is connected with the valve clack through a middle adjusting part and a valve shaft.

2. The hydraulic check valve of claim 1, wherein the water inlet and the water discharge opening are located on the same side of the valve body, a piston cavity for accommodating the valve body is formed in the valve body at a position corresponding to the water inlet and the water discharge opening, the piston is installed in the piston cavity, and a through hole is formed in a side of the piston corresponding to the water discharge opening.

3. The hydraulic check valve of claim 2, wherein the upper portion of the piston chamber is provided with a balance hole for controlling a pressure difference between the inlet and outlet of the water pump.

4. The hydraulic check valve of claim 2, wherein the upper portion of the piston is connected to one end of a vertical rod, the other end of the vertical rod is connected to the intermediate adjusting member through the valve body, and a return spring is disposed around the vertical rod and located in the piston chamber.

5. The hydraulic check valve according to claim 4, wherein the intermediate adjusting member comprises a prying rod, a pressure adjusting spring and a linkage rod, the pressure adjusting spring is installed on the outer side of the valve body, the pressure adjusting spring is sleeved on the installation column, one end of the prying rod is sleeved on the installation column and located at the lower part of the pressure adjusting spring, the other end of the prying rod is hinged to one end of the linkage rod, the other end of the linkage rod penetrates through the valve body to be connected with the valve rod and drives the linkage rod to rotate, the linkage rod rotates to drive the valve clack to open/close from the water outlet position, and the middle part of the prying rod is hinged to the vertical rod.

6. The hydraulic check valve as claimed in claim 5, wherein the lower end of the linkage is engaged with the valve stem, the portion of the linkage located in the valve body is provided with a stopper, and the valve body is provided with an upper stopper and a lower stopper corresponding to the stoppers.

7. The hydraulic check valve of claim 5 or 6, wherein the valve stem is provided with a handle that controls a manual switch of the valve stem.

8. The hydraulic check valve as claimed in claim 4 or 5, wherein the joint of the vertical rod and the valve body and the joint of the linkage rod and the valve body are provided with seals.