CN114233716A

CN114233716A - Hydraulic control one-way valve with two-stage opening function

Info

Publication number: CN114233716A
Application number: CN202111643498.XA
Authority: CN
Inventors: 冯森蕾
Original assignee: Jingjiang Dome Security Engineering Co ltd
Current assignee: Jingjiang Dome Security Engineering Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-03-25

Abstract

The invention discloses a hydraulic control one-way valve with a secondary opening function, which comprises a valve body with a rectangular cross section, wherein end covers are arranged at two ends of the valve body, each end cover is connected with the valve body through a plurality of bolts, an annular sealing groove is formed in the joint of the valve body and the end cover, a sealing ring is arranged in the sealing groove, a cylindrical liquid cavity and a control cavity are formed in the central line inside the valve body, and a cylindrical connecting groove is formed in the upper end of the liquid cavity and communicated with the end covers. Has the advantages that: the valve core can slowly return to slide when hydraulic pressure is unloaded and can not rebound fast and take place the striking with the baffle, and the return of valve block also needs to maintain the pressure balance of piston plate top in the valve core and has certain speed reduction effect simultaneously, has avoided the valve block to receive the elasticity of first spring to take place to strike, improves whole check valve's life, realizes the removal of valve body and case through the hydraulic pressure force of regulation control import, still can realize the second grade when the liquid accuse is palirrhea and open the function.

Description

Hydraulic control one-way valve with two-stage opening function

Technical Field

The invention relates to the technical field of hydraulic one-way valves, in particular to a hydraulic control one-way valve with a secondary opening function.

Background

The pilot operated check valve is a valve which can make the check valve reversely flow by controlling the pressure of fluid. The hydraulic control one-way valve is different from a common one-way valve in that one more control oil way is provided, when the control oil way is not communicated with pressure oil, the hydraulic control one-way valve works like a common one-way valve, and the pressure oil only flows to an oil outlet from an oil inlet and cannot reversely flow. When control pressure is input into the control oil path, the piston mandril moves rightwards under the action of pressure oil, and the one-way valve is jacked open by the mandril, so that the oil inlet and the oil outlet are communicated.

Present hydraulic control check valve does not have the second grade and opens the function, can not carry out flow control according to fluid pressure, the check valve adopts the spring to realize mostly simultaneously, parts such as the inside valve rod of valve and case can receive the rebound effect of spring to take place the striking when hydraulic pressure uninstallation, this kind bumps, the injury to the hydrovalve is very big, not only influence the life-span of hydrovalve, still cause the safety in production accident easily, and the life of spring will decide during the use of check valve, the hydraulic control check valve that has the second grade function of opening is proposed for this.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a hydraulic control one-way valve with a secondary opening function.

In order to achieve the purpose, the invention adopts the following technical scheme:

liquid accuse check valve with function is opened to second grade, including the valve body that the cross-section is the rectangle, the both ends of valve body all are provided with the end cover, every the end cover is connected through being provided with a plurality of bolts with the valve body, annular seal groove has been seted up to the junction of valve body and end cover, be provided with the sealing washer in the seal groove, set up the liquid chamber and the control chamber of cylinder type on the inside center line of valve body, the spread groove and the end cover intercommunication of cylinder type are seted up to the liquid chamber upper end, control chamber lower extreme and end cover intercommunication.

Furthermore, the liquid cavity is located on the middle cavity wall and is fixedly connected with a baffle in a sealing manner, a horn-shaped liquid flowing port is formed in the center of the baffle, a fixed column is fixedly connected to the end cover located on one side of the connecting groove in a coaxial manner, a hollow valve core is connected to the fixed column in a sliding manner in a sealing manner, the outer wall of the valve core is connected with the groove wall of the connecting groove in a sliding manner in a sealing manner, one end, away from the fixed column, of the valve core is of a round platform-shaped structure and abuts against the liquid flowing port of the baffle, the liquid cavity is located on the lower cavity wall of the baffle and is provided with a liquid inlet, and the liquid cavity is located on the upper cavity wall of the baffle and is provided with a liquid outlet.

Further, the inner wall of the valve core is connected with a piston plate in a sealing and sliding mode, the bottom surface of the piston plate is fixedly connected with a connecting rod, one end, far away from the piston plate, of the connecting rod is fixedly connected with a round-table-shaped valve block, the upper end face of the piston plate is fixedly connected with a first spring, one end, far away from the piston plate, of the first spring is fixedly connected with a fixing column, the valve core is located on the upper side and the lower side of the piston plate and is provided with a plurality of first through holes and second through holes respectively, and the valve core is located on the inner wall between the second through holes and the piston plate and is fixedly connected with two symmetrical limiting blocks.

Furthermore, the aperture of the first through hole is the same as that of the second through hole, and the number of the first through holes on the valve core is smaller than that of the second through holes.

Further, the control chamber is internally and hermetically and slidably connected with a lifting plate, a push rod is fixedly connected to the center of the upper end face of the lifting plate, the push rod penetrates through the cavity wall of the control chamber and extends into the liquid chamber, the push rod is hermetically and slidably connected with the cavity wall of the control chamber, a second spring connected with the lifting plate and the cavity wall of the control chamber is sleeved on the push rod, the control chamber is located on the cavity wall below the lifting plate and is provided with a control liquid inlet, and the control chamber is close to the cavity wall at the top and is provided with an air vent communicated with the outside.

Further, the sealed sliding connection of below chamber wall that the control chamber is located the control fluid import has the clamp plate, seted up drain pipe groove and both ends in the valve body and be located the cavity intercommunication of clamp plate below with spread groove and control chamber respectively, the fixed box of up end fixedly connected with of clamp plate, sliding connection has the slider in the fixed box, the upper end fixedly connected with slide bar of slider, the bottom surface fixed connection of fixed box and lifter plate is run through to the upper end of slide bar.

Further, the stiffness coefficient of the second spring is larger than that of the first spring.

The invention has the following advantages:

1. the valve core slowly slides back when hydraulic pressure is unloaded, the valve core cannot rapidly rebound to collide with the baffle, and meanwhile, the valve block returns to have a certain speed reduction effect by maintaining pressure balance above the piston plate in the valve core, so that the valve block is prevented from being impacted by the elastic force of the first spring, and the service life of the integral one-way valve is prolonged.

2. The valve body moves by adjusting the pressure of oil at the control inlet, and oil in the connecting groove is pumped into the control cavity through the liquid guide pipe groove by utilizing the negative pressure effect, so that the valve core moves upwards, the secondary flow liquid channel is opened, and the secondary opening function can be realized when hydraulic control flows backwards.

3. When liquid flows into the liquid outlet, the speed of the liquid filling the space above the piston plate is higher than the speed of the liquid filling the space below the piston plate because the number of the second through holes is larger than that of the first through holes, and the effect of one-way flow limiting is still achieved under the condition that the elasticity of the first spring is damaged.

Drawings

FIG. 1 is a schematic structural diagram of a pilot operated check valve with a secondary opening function according to the present invention;

FIG. 2 is a schematic diagram of a half-section structure of a pilot operated check valve with a two-stage opening function according to the present invention;

FIG. 3 is a schematic plan view of a half-section structure of a pilot operated check valve with a secondary opening function according to the present invention;

fig. 4 is an enlarged schematic view of a portion a in fig. 3.

In the figure: the valve comprises a valve body 1, an end cover 2, a bolt 3, a sealing groove 4, a liquid cavity 5, a control cavity 6, a connecting groove 7, a fixed column 8, a baffle 9, a valve core 10, a liquid inlet 11, a liquid outlet 12, a piston plate 13, a connecting rod 14, a valve block 15, a first spring 16, a first through hole 17, a second through hole 18, a limiting block 19, a pressing plate 20, a liquid guide pipe groove 21, a lifting plate 22, a fixed box 23, a sliding block 24, a sliding rod 25, a control liquid inlet 26, an air vent 27, a push rod 28 and a second spring 29.

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, which are for illustrative purposes only and are not intended to limit the scope of the present invention

Referring to fig. 1-4, the hydraulic control check valve with the secondary opening function comprises a valve body 1 with a rectangular cross section, wherein end covers 2 are arranged at two ends of the valve body 1, each end cover 2 is connected with the valve body 1 through a plurality of bolts 3, an annular sealing groove 4 is formed in the joint of the valve body 1 and each end cover 2, a sealing ring is arranged in each sealing groove 4, a cylindrical liquid cavity 5 and a control cavity 6 are formed in the central line inside the valve body 1, a cylindrical connecting groove 7 is formed in the upper end of the liquid cavity 5 and communicated with the end covers 2, and the lower end of the control cavity 6 is communicated with the end covers 2.

Liquid chamber 5 is located one baffle 9 of middle part chamber wall upper seal fixedly connected with, the central point of baffle 9 puts and sets up the liquid flow mouth of loudspeaker form, coaxial line fixedly connected with fixed column 8 on the end cover 2 that is located spread groove 7 one side, sealed sliding connection has hollow case 10 on the fixed column 8, the outer wall of case 10 and the sealed sliding connection of cell wall of spread groove 7, the one end that fixed column 8 was kept away from to case 10 offsets for round platform column structure and with the liquid flow mouth of baffle 9, liquid chamber 5 is located the below chamber wall of baffle 9 and has seted up inlet 11, liquid chamber 5 is located the top chamber wall of baffle 9 and has seted up liquid outlet 12.

The inner wall of the valve core 10 is connected with a piston plate 13 in a sealing and sliding manner, the bottom surface of the piston plate 13 is fixedly connected with a connecting rod 14, one end, far away from the piston plate 13, of the connecting rod 14 is fixedly connected with a truncated cone-shaped valve block 15, the upper end surface of the piston plate 13 is fixedly connected with a first spring 16, one end, far away from the piston plate 13, of the first spring 16 is fixedly connected with a fixed column 8, the valve core 10 is positioned on the upper side and the lower side of the piston plate 13 and is respectively provided with a plurality of first through holes 17 and second through holes 18, the valve core 10 is positioned on the inner wall between the second through holes 18 and the piston plate 13 and is fixedly connected with two symmetrical limiting blocks 19, the aperture of the first through holes 17 is the same as that of the second through holes 18, and the number of the first through holes 17 on the valve core 10 is smaller than that of the second through holes 18.

Sealed sliding connection has lifter plate 22 in the control chamber 6, lifter plate 22's up end central point puts a push rod 28 of fixedly connected with, push rod 28 runs through the chamber wall of control chamber 6 and extends to in the sap cavity 5, push rod 28 and the sealed sliding connection in chamber wall of control chamber 6, the cover is equipped with a second spring 29 that is connected with lifter plate 22 and the 6 chamber walls in control chamber on the push rod 28, control chamber 6 has been located and has been seted up control fluid inlet 26 on the below chamber wall of lifter plate 22, control chamber 6 has seted up air vent 27 and external intercommunication on being close to the chamber wall at top, the stiffness coefficient of second spring 29 is greater than the stiffness coefficient of first spring 16.

The cavity wall of the control cavity 6 below the control liquid inlet 26 is connected with a pressing plate 20 in a sealing and sliding manner, a liquid guide pipe groove 21 is arranged in the valve body 1, two ends of the liquid guide pipe groove 21 are respectively communicated with the connecting groove 7 and the cavity of the control cavity 6 below the pressing plate 20, the upper end surface of the pressing plate 20 is fixedly connected with a fixed box 23, a sliding block 24 is connected in the fixed box 23 in a sliding manner, the upper end of the sliding block 24 is fixedly connected with a sliding rod 25, the upper end of the sliding rod 25 penetrates through the fixed box 23 to be fixedly connected with the bottom surface of the lifting plate 22, and under a normal state, the liquid guide pipe groove 21, the connecting groove 7 and the cavity of the control cavity 6 below the pressing plate 20 are all filled with oil liquid,

in the device, when no liquid flows in the check valve and no control oil pressure exists at the liquid inlet 26, the second spring 29 pushes the oil liquid to press the connecting groove 17 by pushing the pressing plate 20, so that the valve core 10 abuts against the baffle 9, the first spring 16 pushes the piston plate 13 so that the valve block 15 abuts against the valve core 10, and the check valve is in a closed and disconnected state at the moment, when the device is used, the liquid enters the liquid cavity 5 from the liquid inlet 11, after the cavity below the baffle 9 is fast, the hydraulic pressure acts on the valve block 15 and the valve core 10, as the stiffness coefficient of the second spring 29 is larger than that of the first spring 16, the valve body 15 is pressed to move upwards, the liquid enters the valve core, flows into the liquid cavity above the baffle 9 from the plurality of first through holes 17 and finally leaves from the liquid outlet 12, and when the hydraulic pressure exceeds the bearing capacity of the first through holes 17, the liquid continuously pushes the piston plate 13 to slide upwards to abut against the limiting block 19, the hydraulic pressure is transferred to the valve core 10 to push the valve core 10 to move to the baffle 9 for separation, a secondary flow liquid channel is opened, the use of large-flow liquid is met, the hydraulic pressure on the valve core 10 disappears after the liquid stops flowing, at the moment, the second spring 29 pushes the pressing plate 20 to press the oil liquid into the connecting groove 7 through the liquid guide pipe groove 21, the valve core 10 can slowly slide back and cannot rapidly rebound to collide with the baffle 9 when the hydraulic pressure is unloaded due to the thin liquid guide pipe groove 21 and the flow of the oil liquid in unit time is constant, the return of the valve block 15 also needs to maintain the pressure balance above the piston plate 13 in the valve core 10, the valve block 15 is prevented from being impacted by the elastic force of the first spring 16, the service lives of the valve core 10 and the valve block 15 are prolonged, when the liquid flows into the liquid outlet 12, the speed of the space above the piston plate 13 filled with the liquid is higher than the speed below the piston plate 13 due to the number of the second through holes 18 being larger than the number of the first through holes 17, the effect of one-way current limiting is still achieved under the condition that the elastic force of the first spring 16 is damaged.

After the control liquid inlet 26 inputs oil, the lifting plate 22 will move upwards under the action of the oil to push the push rod 28 to push upwards to eject the valve block 15 out and separate from the valve core 10, at this time, the liquid in the liquid outlet 12 can pass through the first through hole 17 and flow to the liquid inlet 11 through the interior of the valve core 10 to realize reverse flow, when the reverse flow needs to be increased, the oil pressure entering from the control liquid inlet 26 is increased, so that the lifting plate 22 continues to ascend, after the fixed box 23 limits the movement of the slide block 24, the distance between the lifting plate 22 and the pressing plate 20 is the largest, under the condition that the oil pressure is increased, the air pressure above the lifting plate 22 will be smaller than the oil pressure below the pressing plate 20, at this time, the pressing plate 20 will ascend along with the lifting plate 22, after the pressing plate 20 moves upwards, the oil in the connecting groove 7 under the action of negative pressure will enter the control cavity 6 through the liquid guide pipe groove 21, the valve core 10 will move upwards, and open the secondary flow liquid passage, the secondary opening function can be realized when the liquid control backflow is realized.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. Liquid accuse check valve with function is opened to second grade, including valve body (1) that the cross-section is the rectangle, its characterized in that, the both ends of valve body (1) all are provided with end cover (2), every end cover (2) are connected through being provided with a plurality of bolts (3) with valve body (1), annular seal groove (4) have been seted up with the junction of end cover (2) to valve body (1), be provided with the sealing washer in seal groove (4), set up the liquid chamber (5) and the control chamber (6) of cylinder type on valve body (1) inside central line, spread groove (7) and end cover (2) intercommunication of cylinder type have been seted up to liquid chamber (5) upper end, control chamber (6) lower extreme and end cover (2) intercommunication.

2. The pilot-operated check valve with secondary opening function according to claim 1, a baffle plate (9) is fixedly connected on the middle cavity wall of the liquid cavity (5) in a sealing way, a trumpet-shaped liquid flowing port is formed in the center of the baffle (9), a fixing column (8) is coaxially and fixedly connected to the end cover (2) on one side of the connecting groove (7), the fixed column (8) is hermetically and slidably connected with a hollow valve core (10), the outer wall of the valve core (10) is hermetically and slidably connected with the groove wall of the connecting groove (7), one end of the valve core (10) far away from the fixed column (8) is in a circular truncated cone-shaped structure and is abutted against the liquid flowing port of the baffle plate (9), the cavity wall of the liquid cavity (5) which is positioned below the baffle (9) is provided with a liquid inlet (11), the liquid cavity (5) is provided with a liquid outlet (12) on the upper cavity wall of the baffle (9).

3. The pilot-operated check valve with secondary opening function according to claim 2, the inner wall of the valve core (10) is hermetically and slidably connected with a piston plate (13), the bottom surface of the piston plate (13) is fixedly connected with a connecting rod (14), one end of the connecting rod (14) far away from the piston plate (13) is fixedly connected with a circular truncated cone-shaped valve block (15), the upper end surface of the piston plate (13) is fixedly connected with a first spring (16), one end of the first spring (16) far away from the piston plate (13) is fixedly connected with a fixed column (8), the valve core (10) is provided with a plurality of first through holes (17) and second through holes (18) at the upper side and the lower side of the piston plate (13) respectively, the inner wall of the valve core (10) between the second through hole (18) and the piston plate (13) is fixedly connected with two symmetrical limiting blocks (19).

4. The pilot-operated check valve with two-stage opening function according to claim 3, characterized in that the aperture of the first through hole (17) is the same as the aperture of the second through hole (18), and the number of the first through holes (17) on the valve core (10) is smaller than the number of the second through holes (18).

5. The hydraulically-controlled check valve with the secondary opening function according to claim 3, wherein the control chamber (6) is internally and slidably connected with a lifting plate (22) in a sealing manner, a push rod (28) is fixedly connected to the center of the upper end face of the lifting plate (22), the push rod (28) extends into the liquid chamber (5) through the chamber wall of the control chamber (6), the push rod (28) is in sealing and sliding connection with the chamber wall of the control chamber (6), a second spring (29) connected with the lifting plate (22) and the chamber wall of the control chamber (6) is sleeved on the push rod (28), the control chamber (6) is located below the lifting plate (22) and provided with a control liquid inlet (26), and the chamber wall of the control chamber (6) close to the top is provided with a vent hole (27) to communicate with the outside.

6. The pilot-controlled check valve with the secondary opening function according to claim 5, wherein the cavity wall of the control cavity (6) below the control liquid inlet (26) is connected with a pressing plate (20) in a sealing and sliding manner, a liquid guide pipe groove (21) is formed in the valve body (1), two ends of the liquid guide pipe groove are respectively communicated with the connecting groove (7) and the cavity of the control cavity (6) below the pressing plate (20), the upper end face of the pressing plate (20) is fixedly connected with a fixing box (23), a sliding block (24) is connected in the fixing box (23) in a sliding manner, the upper end of the sliding block (24) is fixedly connected with a sliding rod (25), and the upper end of the sliding rod (25) penetrates through the fixing box (23) and is fixedly connected with the bottom face of the lifting plate (22).

7. Hydraulically controlled one-way valve with secondary opening function according to claim 5, characterized in that the stiffness coefficient of the second spring (29) is greater than the stiffness coefficient of the first spring (16).