CN112096926A

CN112096926A - Hydraulic pressure slowly closes formula check valve for hydraulic engineering

Info

Publication number: CN112096926A
Application number: CN202011076396.XA
Authority: CN
Inventors: 平巧丽
Original assignee: Hangzhou Zhongao Industrial Design Co ltd
Current assignee: Hangzhou Zhongao Industrial Design Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2020-12-18

Abstract

The invention relates to the technical field of hydraulic engineering and discloses a hydraulic slow-closing check valve for hydraulic engineering. The slowly opening mechanism is additionally arranged, so that when liquid is required to be transmitted, liquid is continuously transmitted to the transmission belt in the pipeline through the water pump, the liquid flows to the left side of the check valve and is continuously accumulated at the left side, the liquid pressure reaches the degree of pushing the valve clack away, after the valve clack is pushed for a certain distance under the action of the liquid pressure, the liquid flows from a gap of the valve clack, meanwhile, the subsequent liquid impacts the rotating wheel, the rotating wheel slowly rotates, the valve clack compresses the spring under the action of the threaded rod and moves towards the first fixed seat, and the check valve is slowly opened under the action of the threaded rod and the liquid pressure.

Description

Hydraulic pressure slowly closes formula check valve for hydraulic engineering

Technical Field

The invention relates to the technical field of hydraulic engineering, in particular to a hydraulic slow-closing check valve for hydraulic engineering.

Background

Hydraulic engineering is an engineering built for controlling and allocating surface water and underground water in nature to achieve the purposes of removing harmful substances and benefiting. The water engineering is also called as water engineering, water is a valuable resource essential for human production and life, but the naturally existing state of the water is not completely in line with the needs of human, and only the water engineering is built to control water flow, prevent flood disasters and adjust and distribute water quantity so as to meet the needs of human life and production on water resources.

The check valve is mainly divided into a swing check valve (rotating according to the gravity center) and a lift check valve (moving along the axis), wherein the lift check valve refers to a valve which automatically opens and closes a valve clack depending on the flowing of a medium and is used for preventing the medium from flowing backwards, and is also called a check valve, a one-way valve, a reverse flow valve and a back pressure valve.

When the traditional check valve works normally, if the supply of liquid is stopped, the check valve can be automatically closed under the thrust action of backflow liquid, at the moment, the valve clack is closed too fast, so that the water hammer effect is generated, the backflow liquid generates water flow shock waves under the action of water flow inertia, the valve clack is knocked like a hammer, and the force generated by the water flow shock waves back and forth is sometimes very large, so that a valve and a water pump are damaged, therefore, when the check valve is closed, the speed is slowed down as much as possible, the small water hammer effect with the largest amplitude can damage the valve clack, when the lifting check valve is opened, the liquid can accumulate certain pressure firstly, then the valve clack is pushed away, so that the valve clack is opened, the valve clack is opened too fast, the impact force generated by the liquid is large, the pipeline shakes, generates large noise, and impacts on the inner cavity and the steering part of the pipeline, affecting the service life of the pipeline.

Disclosure of Invention

Aiming at the defects of the existing check valve in the use process in the background technology, the invention provides the hydraulic slow-closing check valve for the hydraulic engineering, which has the advantages of hydraulic slow closing and slow opening and solves the technical problems in the background technology.

The invention provides the following technical scheme: the utility model provides a hydraulic pressure slow-closing check valve for hydraulic engineering, includes the valve body, the spacing seat of middle part fixedly connected with of valve body inner chamber, the valve clack that is located spacing seat one end has been cup jointed in the inner chamber activity of valve body, the first fixing base of right-hand member fixedly connected with of valve body inner chamber, the left end of first fixing base and the right-hand member of valve clack pass through spring swing joint, the guide bar that the right-hand member fixedly connected with and the activity of first fixing base middle part of valve clack cup jointed, the slowly-opened chamber has been seted up to the inner chamber of guide bar, the left end fixedly connected with second fixing base of valve body inner chamber, the middle part swing joint of second fixing base has the runner, the middle part fixedly connected with of runner right-hand member is located the threaded rod at runner middle.

Preferably, the inner wall of the valve body is provided with a slowly-closed cavity which is positioned at the left end of the valve clack, a piston sleeve is movably sleeved on the inner cavity of the slowly-closed cavity, the right end of the piston sleeve is fixedly connected with the left end of the valve clack through a connecting rod, the inner wall of the valve body is provided with a water outlet hole which communicates the inner cavity of the valve body with the slowly-closed cavity, and the aperture of the water outlet hole is smaller.

Preferably, the number of the water outlet holes is four, and the water outlet holes are eccentrically arranged relative to the transverse section and the vertical section of the inner cavity of the valve body.

The invention has the following beneficial effects:

1. the slowly opening mechanism is additionally arranged, so that when liquid is required to be transmitted, liquid is continuously transmitted to the transmission belt in the pipeline through the water pump, the liquid flows to the left side of the check valve and is continuously accumulated at the left side, the liquid pressure reaches the degree of pushing the valve clack away, after the valve clack is pushed for a certain distance under the action of the liquid pressure, the liquid flows from a gap of the valve clack, meanwhile, the subsequent liquid impacts the rotating wheel, the rotating wheel slowly rotates, the valve clack compresses the spring under the action of the threaded rod and moves towards the first fixed seat, and the check valve is slowly opened under the action of the threaded rod and the liquid pressure.

2. The hydraulic slow closing mechanism is additionally arranged, when the check valve is opened through water pressure, the valve clack moves towards the right side under the action of liquid pressure, so that negative pressure is formed in the slow closing cavity, moving liquid is sucked and filled in the slow closing cavity, after liquid transmission is stopped, the liquid pressure on the left side of the valve clack is rapidly reduced, the liquid on the right side of the valve clack flows back towards the left side of the valve clack and impacts the valve clack, the valve clack moves towards the left side, at the moment, the liquid in the slow closing cavity is extruded through the piston sleeve under the action of liquid backflow impact force, and the discharge speed of the liquid in the slow closing cavity is slower due to the smaller aperture of the water outlet hole, so that the closing speed of the valve clack is slower when the valve clack is subjected.

3. The auxiliary slow closing mechanism is additionally arranged, so that when the valve clack is hydraulically and slowly closed, the rotating wheel can reversely rotate under the action of the threaded rod when the valve clack moves leftwards under the action of the spring and the pressure of the backflow liquid, liquid discharged to the left side of the valve clack from the water outlet hole can form a water column with certain pressure while the valve clack is slowly closed, the rotating speed of the rotating wheel can be reduced through the water column due to the fact that the water outlet hole is eccentrically formed, the closing speed of the valve clack is further reduced, the generation of a water hammer effect is further reduced, and the service life of the check valve and the service life of a pipeline are guaranteed.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the structure of the runner of the present invention;

FIG. 3 is a perspective view of the internal structure of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 5 is a perspective view of the wheel of the present invention.

In the figure: 1. a valve body; 2. a valve flap; 3. a first fixed seat; 4. a spring; 5. a guide bar; 6. a second fixed seat; 7. a rotating wheel; 8. a threaded rod; 9. a slow-closing cavity; 10. a connecting rod; 11. a piston sleeve; 12. a water outlet hole; 13. a limiting seat; 14. the cavity is slowly opened.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a hydraulic slow-closing check valve for hydraulic engineering comprises a valve body 1, a limit seat 13 is fixedly connected to the middle of the inner cavity of the valve body 1, a valve flap 2 at one end of the limit seat 13 is movably sleeved in the inner cavity of the valve body 1, a first fixing seat 3 is fixedly connected to the right end of the inner cavity of the valve body 1, the left end of the first fixing seat 3 is movably connected to the right end of the valve flap 2 through a spring 4, a guide rod 5 movably sleeved in the middle of the first fixing seat 3 is fixedly connected to the right end of the valve flap 2, a slow-opening cavity 14 is formed in the inner cavity of the guide rod 5, a second fixing seat 6 is fixedly connected to the left end of the inner cavity of the valve body 1, a rotating wheel 7 is movably connected to the middle of the second fixing seat 6, a threaded rod 8 positioned in the middle of the rotating wheel 7 is fixedly connected to the middle of, when making the liquid circulation, liquid constantly piles up in the left side of valve clack 2, make liquid pressure constantly increase, and when liquid pressure reaches a certain degree, just can make valve clack 2 compression spring 4, move the certain distance to the right side, and after valve clack 2 moved the certain distance to the right, owing to can make valve clack 2 and spacing seat 13 separate, thereby make the clearance appear between the two, make liquid can pass through the clearance and circulate to valve clack 2 right side, and valve clack 2 is after moving the certain distance, just under the effect of threaded rod 8 screw thread, can't move to the right, and after liquid begins to circulate, runner 7 can be strikeed to follow-up liquid, make the runner slow 7 slow rotation, thereby make threaded rod 8 synchronous revolution, thereby make under the effect that liquid pressure and screw thread no longer supported, valve clack 2 slowly moves to the right side, make the check valve slowly opened.

Wherein, the inner wall of the valve body 1 is provided with a slowly-closed cavity 9 positioned at the left end of the valve clack 2, the inner cavity of the slowly-closed cavity 9 is movably sleeved with a piston sleeve 11, the right end of the piston sleeve 11 is fixedly connected with the left end of the valve clack 2 through a connecting rod 10, the inner wall of the valve body 1 is provided with a water outlet hole 12 for communicating the inner cavity of the valve body 1 with the slowly-closed cavity 9, and the aperture of the water outlet hole 12 is smaller, when the check valve is opened, because the valve clack 2 can drive the piston sleeve 11 to move rightwards through the connecting rod 10, negative pressure is formed in the slowly-closed cavity 9, liquid at the left side of the valve clack 2 is sucked through the water outlet hole 12 for negative pressure filling, after the valve clack 2 moves to the left side of the first fixed seat 3, the slowly-closed cavity 9 is completely opened, and the interior is filled with liquid, and when liquid, make valve clack 2 move the certain distance to the left side, make piston sleeve 11 move left simultaneously, and the extrusion slowly closes the liquid in the chamber 9, make liquid discharge from apopore 12 department, and because the aperture of apopore 12 is less, make liquid exhaust velocity slower, thus make through liquid pressure, make the speed that valve clack 2 moved left slow down, make the closing speed of stagnant water valve slow down, alleviated the production of water hammer effect, protected the working life of stagnant water valve and pipeline.

Wherein, the liquid through the needs carry out the transmission forms hydraulic pressure and slowly closes, has avoided valve body 1 to use after the certain time, because sealed inefficacy leads to hydraulic oil to leak, causes the problem of pollution, has ensured the pure degree of liquid.

Wherein, the quantity of apopore 12 is four, and for the violence of 1 inner chamber of valve body, erect the cross-section and be eccentric seting up, make when the stagnant water valve carries out normal slow closure, because valve clack 2 moves to the left side, it leads to runner 7 to rotate slowly to return under the effect of threaded rod 8, and slowly close the liquid in the chamber 9 when outwards discharging through apopore 12, because the pressure that receives is great, make the liquid of discharging from apopore 12 department can form the water column that has certain impact force, and because apopore 12 is offered for the eccentricity, make the one side that runner 7 can be strikeed to the discharged water column from apopore 12 department, make when valve clack 2 carries out slow closure, the slew velocity of runner 7 is slowed down, thereby make the closing velocity of valve clack 2 slowed down, make the slow closure efficiency of stagnant water valve further improve.

The using method of the invention is as follows: firstly, installing a valve body 1 in the middle of a water conservancy pipeline, enabling the left side of a valve clack 2 to be a water inlet and the right side of the valve clack 2 to be a water outlet, and then;

when the check valve is open: continuously injecting water into the pipeline through a water pump, so that the amount of liquid on the left side of the valve clack 2 is continuously increased, the liquid pressure is continuously increased, when the pressure reaches a certain value, the liquid pressure enables the valve clack 2 to compress the spring 4 to move towards the right side, the liquid on the left side of the valve clack 2 can flow towards the right side from a gap opened by the valve clack 2, after the valve clack 2 moves a certain distance, the required force for moving the valve clack 2 towards the right is increased under the action of the threaded rod 8, part of the liquid flows towards the right, so that the valve clack 2 cannot be pushed away by the liquid pressure, when the liquid flows, the rotating wheel 7 rotates slowly under the action of subsequent liquid flow, so that the threaded rod 8 rotates synchronously, the thread cannot support the valve clack 2, therefore, when the liquid flows, the valve clack 2 opens slowly until the valve clack 2 moves to the, the check valve is completely opened, and when the valve clack 2 gradually moves towards the right side, the valve clack 2 drives the piston sleeve 11 to synchronously move through the connecting rod 10, so that negative pressure is formed in the slowly closed cavity 9, and the slowly closed cavity 9 sucks liquid through the water outlet hole 12 to perform pressure filling on the inner cavity of the slowly closed cavity 9;

when the check valve is closed: after the liquid transmission is finished, the water supply of the water pump is stopped, so that the liquid pressure on the left side of the valve clack 2 in the valve body 1 is sharply reduced, the liquid on the right side of the valve clack 2 flows back, the valve clack 2 moves a certain distance to the left side under the action of liquid backflow and automatic resetting of the spring 4, the piston sleeve 11 compresses the liquid in the slowly-closed cavity 9 under the action of leftward movement of the valve clack 2, the liquid in the slowly-closed cavity 9 is discharged outwards through the water outlet hole 12, the liquid discharging speed is lower due to the smaller aperture of the water outlet hole 12, the leftward movement speed of the valve clack 2 is slower, the closing speed of the valve clack 2 is slower, the valve clack 2 slowly moves to the left side due to the resetting of the spring 4 and the pressure of the backflow liquid, meanwhile, under the action of the threaded rod 8, the rotating wheel 7 reversely rotates, and the liquid in the slowly-closed cavity 9 is discharged outwards through the water, because the pressure that liquid received is great for can be formed with the water column of certain pressure after the liquid is discharged, and because apopore 12 is offered for the eccentricity, make the blade of water column ability impact runner 7, make the slew velocity of runner 7 slow down, thereby make the closing speed of valve clack 2 further slow down.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hydraulic pressure slowly closes formula check valve for hydraulic engineering, includes valve body (1), the spacing seat of middle part fixedly connected with (13) of valve body (1) inner chamber, valve clack (2) that are located spacing seat (13) one end are cup jointed in the inner chamber activity of valve body (1), the first fixing base of right-hand member fixedly connected with (3) of valve body (1) inner chamber, spring (4) swing joint is passed through to the left end of first fixing base (3) and the right-hand member of valve clack (2), guide bar (5) that the right-hand member fixedly connected with of valve clack (2) cup jointed with first fixing base (3) middle part activity, its characterized in that: slowly open chamber (14) have been seted up to the inner chamber of guide bar (5), the left end fixedly connected with second fixing base (6) of valve body (1) inner chamber, the middle part swing joint of second fixing base (6) has runner (7), the middle part fixedly connected with of runner (7) right-hand member is located threaded rod (8) at runner (7) middle part, and the screw thread of threaded rod (8) only is at the middle part, and left end and right-hand member are smooth cylinder pole.

2. The hydraulic slow-closing check valve for hydraulic engineering according to claim 1, characterized in that: the inner wall of valve body (1) is seted up and is located slowly chamber (9) that closes of valve clack (2) left end, the inner chamber activity that slowly closes chamber (9) has cup jointed piston sleeve (11), the right-hand member of piston sleeve (11) passes through the left end fixed connection of connecting rod (10) and valve clack (2), apopore (12) with valve body (1) inner chamber and slowly close chamber (9) intercommunication are seted up to the inner wall of valve body (1), and the aperture of apopore (12) is less.

3. The hydraulic slow-closing check valve for hydraulic engineering according to claim 2, characterized in that: the number of the water outlet holes (12) is four, and the water outlet holes are eccentrically arranged relative to the transverse and vertical sections of the inner cavity of the valve body (1).