CN116146752A - Hydraulic control one-way valve - Google Patents

Hydraulic control one-way valve Download PDF

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Publication number
CN116146752A
CN116146752A CN202310303647.0A CN202310303647A CN116146752A CN 116146752 A CN116146752 A CN 116146752A CN 202310303647 A CN202310303647 A CN 202310303647A CN 116146752 A CN116146752 A CN 116146752A
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CN
China
Prior art keywords
sliding sleeve
piston
communicated
control
valve
Prior art date
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Pending
Application number
CN202310303647.0A
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Chinese (zh)
Inventor
王帅
余广
梁慧群
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Shanxi Niuyi Technology Co ltd
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Shanxi Niuyi Technology Co ltd
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Application filed by Shanxi Niuyi Technology Co ltd filed Critical Shanxi Niuyi Technology Co ltd
Priority to CN202310303647.0A priority Critical patent/CN116146752A/en
Publication of CN116146752A publication Critical patent/CN116146752A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston

Abstract

The invention discloses a hydraulic control one-way valve, which comprises a valve body, a valve core, a spring, a push rod, a piston and a sliding sleeve; the valve body is provided with an inlet, an outlet and a control port, the valve core is positioned between the inlet and the outlet, the spring is connected with the valve core, and the spring can drive the valve core to move to cut off the communication between the inlet and the outlet; the push rod is connected in the valve body in a sliding way, and can push the valve core to overcome the spring and move to be communicated with the inlet and the outlet; the piston and the sliding sleeve are coaxially and relatively connected in a sliding manner in the valve body, and are positioned at one end of the push rod far away from the valve core; the control port can be communicated with the upper end of the piston to output control oil to drive the piston to push the push rod to drive the valve core; the control port can be communicated with the upper end of the sliding sleeve so as to output control oil to drive the sliding sleeve to push the push rod to drive the valve core. The hydraulic control one-way valve can be opened without changing the pressure of control oil and the extension of the piston or the sliding sleeve, and is simple to control.

Description

Hydraulic control one-way valve
Technical Field
The invention belongs to the technical field of hydraulic valves, and particularly relates to a hydraulic control one-way valve.
Background
The one-way valve is a direction control valve which can only flow in along an inlet and can not flow back from an outlet, and is applied to the occasion that the reverse flow of the fluid is not allowed. The hydraulic control check valve is a valve which can reversely circulate the check valve by controlling the fluid pressure. The hydraulic control one-way valve is different from the common one-way valve in that a control oil way is added, when the control oil way is not connected with pressure oil, the hydraulic control one-way valve works like the common one-way valve, and the pressure oil only flows from an inlet to an outlet and cannot flow reversely; when the control oil way is provided with control pressure input, the piston ejector rod pushes the one-way valve core open under the action of pressure oil, so that the oil inlet and the oil outlet are communicated, and oil can flow reversely.
The pilot ratio (or pilot ratio) is an important technical parameter of the pilot check valve. In the prior art, the hydraulic control ratio of the hydraulic control check valve is fixed and not adjustable, and the hydraulic control check valves with different hydraulic control ratios can only be used in a fixed load environment; when the load change is not large, a hydraulic control one-way valve with larger hydraulic control ratio is generally selected, so that the reverse opening pressure of the hydraulic control one-way valve can be reduced, and the energy consumption of a hydraulic system is reduced; under the working condition of larger load change, a hydraulic control one-way valve with smaller hydraulic control is generally used, so that fluctuation of hydraulic control pressure can be filtered, and when the hydraulic control pressure fluctuates, the valve core is opened with smaller fluctuation due to smaller hydraulic control, so that the hydraulic control one-way valve works more stably.
However, the hydraulic equipment in the prior art needs to be used in different load environments, and when a hydraulic check valve with a small hydraulic control ratio is used under the working condition of small load change, the pressure of a hydraulic system is too high to consume energy; when the hydraulic control one-way valve with large hydraulic control ratio is used under the working condition of large load change, the hydraulic control one-way valve works unstably, so that the hydraulic equipment shakes.
Disclosure of Invention
The present invention addresses or at least partially solves the above-mentioned problems by providing a hydraulically controlled one-way valve.
The hydraulic control one-way valve comprises a valve body, a valve core, a spring, a push rod, a piston and a sliding sleeve; the valve body is provided with an inlet, an outlet and a control port, the valve core is positioned between the inlet and the outlet, the spring is connected with the valve core, and the spring can drive the valve core to move to cut off the communication between the inlet and the outlet; the push rod is connected in a sliding manner in the valve body and can push the valve core to overcome the spring and move to be communicated with the inlet and the outlet; the piston and the sliding sleeve are coaxially and relatively connected in a sliding manner in the valve body, and are positioned at one end of the push rod far away from the valve core; the control port can be communicated with the upper end of the piston to output control oil to drive the piston to push the push rod to drive the valve core; the control port can be communicated with the upper end of the sliding sleeve so as to output control oil to drive the sliding sleeve to push the push rod to drive the valve core.
Preferably, the hydraulically controlled check valve further comprises a rotary shaft; the rotary shaft is rotationally connected to the inside of the valve body, and the piston and the sliding sleeve are slidingly connected to the lower end of the rotary shaft; the rotary shaft is provided with a flow passage, and the communication relation between the control port and the upper end of the piston and the communication relation between the control port and the upper end of the sliding sleeve can be controlled along with the rotation of the rotary shaft.
Preferably, the rotating shaft is provided with a piston inlet channel and a piston outlet channel; one end of the piston inlet channel is selectively communicated with the control port, and the other end of the piston inlet channel is communicated with the upper end of the piston; one end of the piston outlet channel is communicated with the upper end of the piston, and the other end of the piston outlet channel is selectively communicated with the lower end of the piston; when the rotating shaft rotates to the state that the piston inlet channel is communicated with the control port, the piston outlet channel is disconnected with the lower end of the piston.
Preferably, the rotating shaft is provided with a sliding sleeve inlet runner and a sliding sleeve outlet runner; one end of the sliding sleeve inlet channel is selectively communicated with the control port, and the other end of the sliding sleeve inlet channel is communicated with the upper end of the sliding sleeve; one end of the sliding sleeve outlet channel is communicated with the upper end of the sliding sleeve, and the other end of the sliding sleeve outlet channel is selectively communicated with the lower end of the sliding sleeve; when the rotating shaft rotates to the state that the sliding sleeve inflow channel is communicated with the control port, the sliding sleeve outflow channel is disconnected with the lower end of the sliding sleeve.
Preferably, along the axial direction of the rotating shaft, the upper end of the piston and the upper end of the sliding sleeve are located at different sections, and the rotating shaft can rotate to the control port and simultaneously communicate with the piston inlet channel and the sliding sleeve inlet channel.
Preferably, the inner surface of the valve body is provided with a control arc-shaped groove, a piston arc-shaped groove, a sliding sleeve arc-shaped groove and a connecting flow passage along the axial direction along the circumferential direction; the control arc-shaped groove is communicated with the control port and covers the sections of the piston inlet channel and the sliding sleeve inlet channel; the connecting runner extends to the lower end of the piston and the lower end of the sliding sleeve and is communicated with the piston arc-shaped groove and the sliding sleeve arc-shaped groove; the piston inlet channel and the sliding sleeve inlet channel can simultaneously rotate to be communicated with the control arc-shaped groove, and the piston outlet channel and the sliding sleeve outlet channel are respectively disconnected with the piston arc-shaped groove and the sliding sleeve arc-shaped groove.
Preferably, the upper end of the rotary shaft serves as a driving end and extends to the outside of the valve body.
Preferably, the end face of the upper end of the rotating shaft is provided with an inner hexagon.
Preferably, the hydraulically controlled check valve comprises a plurality of sliding sleeves; the sliding sleeves are sequentially sleeved and connected with each other and can perform relative reciprocating movement so as to push the push rods respectively.
Preferably, the push rod is provided with a balance runner; the balance runner is communicated with the upper end of the push rod and the lower end of the push rod.
The hydraulic control one-way valve has the following beneficial technical effects:
1. in the invention, the piston and the sliding sleeve are arranged, and the control port can be connected with the upper end of the piston and the upper end of the sliding sleeve to respectively drive the piston to push the push rod to move and drive the sliding sleeve to push the push rod to move, so that the acting area of control oil can be changed by changing the amount of the piston or the sliding sleeve to move to push the push rod to move, namely, the control oil can be independently acted on the piston or the sliding sleeve or simultaneously acted on the piston and the sliding sleeve, so that the hydraulic control ratio of the hydraulic control check valve is changed.
2. According to the invention, the rotating shaft is arranged, the arc-shaped groove and the connecting runner are arranged on the inner surface of the valve body, meanwhile, the runner is arranged on the rotating shaft, and the rotating shaft is rotated to drive the runner to be matched with the arc-shaped groove on the valve body, so that which runner is matched with the arc-shaped groove in the rotating process, the number of the pistons or the sliding sleeves is selected, the action area of hydraulic control oil is changed, the purpose of changing the hydraulic control ratio is achieved, and the adjustment is controlled in a gear adjustment mode, so that the adjustment is convenient and quick, and the efficiency is improved;
3. according to the invention, the rotating shaft is arranged, the arc-shaped groove is arranged on the inner surface of the valve body, the flow passage is arranged on the rotating shaft, and the closing gear is arranged on the rotating shaft, so that when the rotating shaft is positioned in the closing gear, the upper ends of all pistons and sliding sleeves are closed and are not communicated with the control port, the hydraulic control oil way is closed and is invalid, the hydraulic control check valve is prevented from being opened by mistaken touch caused by pressure fluctuation of the control oil way, and the hydraulic control check valve is safer and more reliable to use.
Drawings
FIG. 1 is a schematic cross-sectional view of a hydraulic control check valve according to the present embodiment;
FIG. 2 is a schematic cross-sectional view of FIG. 1 along the direction A-A;
FIG. 3 is a schematic cross-sectional view of the structure of FIG. 1 along the direction B-B;
fig. 4 is a schematic cross-sectional view of fig. 1 along the direction C-C.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and the examples.
Referring to fig. 1 to 4, the hydraulic control check valve of the present embodiment includes a valve body 1, a valve core 2, a spring 3, a push rod 4, a piston 5, a first sliding sleeve 6 and a second sliding sleeve 7. The hydraulic control one-way valve adopts a cartridge valve structure, the valve body 1 consists of a valve sleeve, a top cover and a bottom cover, and an inlet 8, an outlet 9 and a control port 10 are arranged on the valve body 1. The valve spool 2 is located inside the valve body 1 and between the inlet 8 and the outlet 9, the spring 3 is connected to the valve spool 2, and the spring 3 is able to drive the valve spool 2 with respect to the valve body 1 to shut off the communication between the inlet 8 and the outlet 9, i.e. to the position shown in fig. 1. The push rod 4 is slidably connected to the inside of the valve body 1, and can push the valve core 2 to move to a position communicating the inlet 8 and the outlet 9 against the spring 3. The piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 are coaxially arranged and are respectively connected inside the valve body 1 in a sliding manner, and are positioned at one end of the push rod 4 far away from the valve core 2, namely above the push rod 4. The control port 10 can be communicated with the upper end of the piston 5 to output control oil to drive the piston 5 to push the push rod 4 to drive the valve core 2. The control port 10 can also be communicated with the upper end of the first sliding sleeve 6 so as to output control oil to drive the first sliding sleeve 6 to push the push rod 4 to drive the valve core 2. The control port 10 can also be communicated with the upper end of the second sliding sleeve 7 so as to output control oil to drive the second sliding sleeve 7 to push the push rod 4 to drive the valve core 2.
In the pilot operated check valve of this embodiment, through setting up piston and sliding sleeve in the inside of valve body to make the control mouth can be connected with the upper end of piston and sliding sleeve, with the upper end of drive piston promotion push rod respectively move and drive sliding sleeve promotion push rod moves, thereby make through changing piston or sliding sleeve and remove the quantity that carries out the removal to promotion push rod, just can change the area of action of control oil, act on the piston alone or act on the sliding sleeve alone or act on piston and sliding sleeve simultaneously, thereby change the pilot operated ratio of this pilot operated check valve, from this, when this pilot operated check valve receives the load great, only need increase the extension of piston or sliding sleeve just can increase the area of control oil, make also can open this pilot operated check valve under the circumstances that does not change control oil pressure, control is simple.
As shown in fig. 1 to 4, in the hydraulically controlled check valve of the present embodiment, a rotary shaft 11 is further included. The rotary shaft 11 is rotatably coupled to the inside of the valve body 1, and the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 are slidably coupled to the lower end of the rotary shaft 11. Meanwhile, a plurality of flow passages are arranged on the rotating shaft 11, and the communication relation between the control port 10 and the upper end of the piston 5 and the communication relation between the control port and the upper end of the first sliding sleeve 6 and the upper end of the second sliding sleeve 7 can be controlled through the reciprocating rotation of the plurality of flow passages along with the rotating shaft 11.
At this time, through reciprocating rotation to the pivot, utilize the runner just can change the control mouth and the upper end of piston or sliding sleeve and form the relation of intercommunication, and then can be driven corresponding piston or sliding sleeve by the control oil and stretch out downwards to drive the push rod and stretch out, promote the case and open promptly.
Specifically, as shown in fig. 1 to 4, a piston inlet channel 12 and a piston outlet channel 13, a first slide sleeve inlet channel 14 and a first slide sleeve outlet channel 15, a second slide sleeve inlet channel 16 and a second slide sleeve outlet channel 17 are provided on a rotary shaft 11 of the present embodiment.
Wherein, one end of the piston inlet channel 12 is selectively communicated with the control port 10, and the other end is communicated with the upper end of the piston 5; one end of the piston outlet channel 13 is communicated with the upper end of the piston 5, and the other end is selectively communicated with the lower end of the piston 5; and the rotary shaft 11 rotates until the piston inlet channel 12 is communicated with the control port 10, and the piston outlet channel 13 is disconnected from the lower end of the piston 5. One end of the first sliding sleeve inlet channel 14 is selectively communicated with the control port 10, and the other end of the first sliding sleeve inlet channel is communicated with the upper end of the first sliding sleeve 6; one end of the first sliding sleeve outlet flow passage 15 is communicated with the upper end of the first sliding sleeve 6, and the other end is selectively communicated with the lower end of the first sliding sleeve 6; and when the rotating shaft 11 rotates to the state that the first sliding sleeve inlet flow passage 14 is communicated with the control port 10, the first sliding sleeve outlet flow passage 15 is disconnected from the lower end of the first sliding sleeve 6. One end of the second sliding sleeve inlet channel 16 is selectively communicated with the control port 10, and the other end is communicated with the upper end of the second sliding sleeve 7; one end of the second sliding sleeve outlet channel 17 is communicated with the upper end of the second sliding sleeve 7, and the other end is selectively communicated with the lower end of the second sliding sleeve 7; and when the rotating shaft 11 rotates to the state that the second sliding sleeve inlet flow passage 16 is communicated with the control port 10, the second sliding sleeve outlet flow passage 17 is disconnected from the lower end of the second sliding sleeve 7.
At this time, in the process of rotating the rotating shaft, through controlling the communication relation between different flow channels and the control port, the corresponding piston or sliding sleeve can be subjected to extension driving control, so that the area of the output acting force of control oil is changed, and different control forces can be output to the push rod under the condition of keeping the pressure of the control oil unchanged, thereby achieving the purpose of changing the hydraulic control ratio of the hydraulic control one-way valve.
Further, in the present embodiment, the upper end of the piston 5, the upper end of the first sliding sleeve 6 and the upper end of the second sliding sleeve 7 are located at different sectional positions of the rotary shaft 11, i.e., at different sectional height positions as shown in fig. 1, respectively, and the rotary shaft 11 can be rotated to the control port 10 while being in communication with the upper end of the piston 5, the upper end of the first sliding sleeve 6 and the upper end of the second sliding sleeve 7. Therefore, the range of the acting area of the control oil can be further increased, the hydraulic control ratio of the hydraulic control one-way valve is increased, and the control precision and range of the hydraulic control one-way valve are improved.
As shown in fig. 1 to 4, the valve body 1 of the present embodiment is provided on the inner surface thereof with a control arc groove 18, a piston arc groove 19, a slide sleeve arc groove 20, and a connecting flow passage 21 in the axial direction. The control arc groove 18 communicates with the control port 10 and covers the cross sections of the piston intake passage 12, the first slide-in passage 14 and the second slide-in passage 16 in the axial direction of the rotary shaft 11, i.e., the control port 10 can be simultaneously brought into communication with the piston intake passage 12, the first slide-in passage 14 and the second slide-in passage 16 through the control arc groove 18. The connecting flow passage 21 extends downward in the axial direction of the rotary shaft 11 to the lower end of the piston 5, the lower end of the first sliding sleeve 6, and the lower end of the second sliding sleeve 7, and communicates the piston arcuate groove 19 and the sliding sleeve arcuate groove 20. The piston inlet channel 12, the first slide sleeve inlet channel 14 and the second slide sleeve inlet channel 16 can simultaneously rotate to be communicated with the control arc-shaped groove 18, and the piston outlet channel 13, the first slide sleeve outlet channel 15 and the second slide sleeve outlet channel 17 are respectively disconnected with the piston arc-shaped groove 19, the slide sleeve arc-shaped groove 20 and the connecting channel 21.
At this time, by means of the arrangement of the control arc-shaped groove, the piston arc-shaped groove, the sliding sleeve arc-shaped groove and the connecting flow channels, the change of the hydraulic control ratio can be realized by adjusting the communication relation between the control port and different flow channels and the simultaneous communication between the control port and all the flow inlet channels in the reciprocating rotation process of the rotating shaft.
In the hydraulic control one-way valve of the embodiment, a piston and two sliding sleeves are arranged, so that the extension of the piston and the two sliding sleeves is controlled, and different acting forces on the push rod are formed. Of course, in other embodiments, the number of sliding sleeves may be adjusted, e.g., increased or decreased, according to different design and usage requirements, and by providing corresponding flow channels, the force applied to the push rod may be further changed, changing the hydraulic control ratio of the hydraulic control check valve.
In addition, in the hydraulic control one-way valve of the embodiment, through setting the flow channels of the control piston and the different sliding sleeves at different section positions and setting the flow inlet channels and the flow outlet channels of different sections in different circular arc angles, the communication relation between the control port and the different flow inlet channels can be realized in the rotating process of the rotating shaft.
For example, as shown in fig. 2 to 4, in the present embodiment, the piston outflow path 13, the first sliding outflow path 15 and the second sliding outflow path 17 are disposed in the same axial direction, the piston inflow path 12 is disposed at a position rotated 90 degrees clockwise, the first sliding inflow path 14 is disposed at a position rotated 120 degrees clockwise, the second sliding inflow path 16 is disposed at a position rotated 150 degrees clockwise, the control arc-shaped groove 18 and the piston arc-shaped groove 19 are symmetrically disposed with a central angle of about 60 degrees, the central angle of the sliding arc-shaped groove 20 is about 30 degrees, and the connecting path 21 communicates with the ends of the control arc-shaped groove 18 and the piston arc-shaped groove 19. At this time, in the process of rotating the rotating shaft, according to the position shown in fig. 4, the communication relation between the control port and the connecting channel and the different flow channels is changed every 30 degrees of rotation, so as to achieve the purpose of changing the action area of the control oil.
As shown in fig. 1, in the present embodiment, the upper end of the rotary shaft 11 serves as a driving end and extends to the outside of the valve body 1. At this time, the hydraulic control ratio of the hydraulic control one-way valve can be changed by reciprocating the upper end of the rotating shaft. Specifically, in the present embodiment, the end face of the upper end of the rotary shaft 11 is flush with the upper end face of the valve body 1 and is provided with an inner hexagon, so that the reciprocating rotary operation of the rotary shaft can be performed by means of an inner hexagon wrench. Of course, in other embodiments, according to the convenience of operation, the upper end of the rotating shaft may also extend completely out of the valve body and be provided with a hand wheel for the rotating operation of the rotating shaft.
In addition, as shown in fig. 1, a balance runner is further provided on the push rod 4 of the present embodiment, so as to communicate the upper end and the lower end of the push rod 4, so as to ensure accurate pushing control of the push rod 4.
Referring to fig. 1 to 4, the working process of the hydraulic control check valve of the present embodiment is specifically as follows:
when the hydraulic control one-way valve of the embodiment is used, when the oil of the inlet 8 enters the valve body 1 and drives the valve core 2 to move downwards against the acting force of the spring 3, the valve core 2 is opened to communicate the inlet 8 with the outlet 9, so that the oil of the inlet 8 flows out through the outlet 9, and the forward flow is completed. When the oil in the inlet 8 stops or the pressure is reduced, the valve core 2 keeps at the position shown in the figure 1 under the acting force of the spring 3 to cut off the communication between the inlet 8 and the outlet 9, so that the oil in the outlet 9 is maintained in pressure and cannot flow back to the inlet 8, and the check valve function of the hydraulic check valve is completed.
When the hydraulic control one-way valve is in a closing gear, the piston inlet channel 12, the first sliding sleeve inlet channel 14 and the second sliding sleeve inlet channel 16 are all positioned at positions which are not communicated with the control arc groove 18, and the piston outlet channel 13, the first sliding sleeve outlet channel 15 and the second sliding sleeve outlet channel 17 are all communicated with the connecting channel 21, so that the two ends of the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 are in a communicating relation with equal upper and lower pressures, control oil at the control port 10 cannot enter the upper ends of the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7, the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 are kept in a non-extending state, and the problem that the hydraulic control one-way valve is opened by mistake due to sudden rising of the control oil pressure at the control port 10 is avoided.
When the hydraulic control check valve of the present embodiment needs to be opened, the rotary shaft 11 is driven by the socket wrench to rotate clockwise 30 degrees from the position shown in fig. 4, so that the second sliding sleeve inlet channel 16 rotates to be in communication with the control arc groove 18, the second sliding sleeve outlet channel 17 is disconnected from the connecting channel 21, the piston inlet channel 12 and the first sliding sleeve inlet channel 14 are kept in communication with the control arc groove 18, and the piston outlet channel 13 and the first sliding sleeve outlet channel 15 are kept in communication with the connecting channel 21 through the piston arc groove 19 and the sliding sleeve arc groove 20 respectively. At this time, the control oil at the control port 10 flows to the upper end of the second sliding sleeve 7 through the second sliding sleeve inlet channel 16, so that the two ends of the second sliding sleeve 7 form a pressure difference to drive the second sliding sleeve 7 to move downwards relative to the rotating shaft 11 and the first sliding sleeve 6, so that the second sliding sleeve 7 pushes the push rod 4 to move downwards, and the push rod 4 pushes the valve core 2 to move to be communicated with the inlet 8 and the outlet 9 against the spring 3, and because the pressure oil at the control port 10 only acts on the annular area of the second sliding sleeve 7, a larger pressure is required to overcome the spring 3 to open the valve core 2, thereby completing the hydraulic control opening under the high control pressure gear.
When the hydraulic control one-way valve is in a high control pressure gear but the pressure oil at the control port is insufficient to open the hydraulic control one-way valve, the rotary shaft 11 is driven by the socket wrench to rotate clockwise 30 degrees again, so that the first sliding sleeve inlet channel 14 rotates to be communicated with the control arc-shaped groove 18, the first sliding sleeve outlet channel 15 slides out of the sliding sleeve arc-shaped groove 20 to be disconnected from the connecting channel 21, the second sliding sleeve inlet channel 16 continues to be communicated with the control arc-shaped groove 18, the second sliding sleeve outlet channel 17 continues to be disconnected from the connecting channel 21, the piston inlet channel 12 continues to be disconnected from the control arc-shaped groove 18, and the piston outlet channel 13 still maintains to be communicated with the connecting channel 21 through the piston arc-shaped groove 19. At this time, under the condition that the control oil at the control port 10 keeps pushing out the second sliding sleeve 7, the control oil flows to the upper end of the first sliding sleeve 6 through the first sliding sleeve inlet channel 14, so that pressure difference is formed at two ends of the first sliding sleeve 6 to drive the first sliding sleeve 6 to move downwards relative to the rotating shaft 11 and the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 jointly push the push rod 4 to move downwards, so that the push rod 4 pushes the valve core 2 to be communicated with the inlet 8 and the outlet 9 against the spring 3, and because the pressure oil at the control port 10 acts on annular areas of the first sliding sleeve 6 and the second sliding sleeve 7 at the same time, the pressure of the control oil for opening the valve core 2 needs to be reduced against the spring 3, so that the hydraulic control opening under the medium control pressure gear is completed.
When the pilot operated check valve is in the medium control pressure gear but the pressure oil at the control port is still insufficient to open the pilot operated check valve, the rotary shaft 11 is driven by the socket wrench to rotate clockwise 30 degrees again, so that the piston inlet channel 12 rotates to be communicated with the control arc-shaped groove 18, the piston outlet channel 13 slides out of the piston arc-shaped groove 19 to be disconnected from the connecting channel 21, the first sliding sleeve inlet channel 14 and the second sliding sleeve inlet channel 16 continue to be communicated with the control arc-shaped groove 18, and the first sliding sleeve outlet channel 15 and the second sliding sleeve outlet channel 17 continue to be disconnected from the connecting channel 21. At this time, under the condition that the control oil at the control port 10 keeps pushing out the first sliding sleeve 6 and the second sliding sleeve 7, the control oil flows to the upper end of the piston 5 through the piston inlet channel 12, so that pressure difference is formed at two ends of the piston 5 to drive the piston 5 to move downwards relative to the rotating shaft 11, the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 jointly push the push rod 4 to move downwards, so that the push rod 4 pushes the valve core 2 to move to be communicated with the inlet 8 and the outlet 9 against the spring 3, and because the pressure oil at the control port 10 acts on the piston 5, the first sliding sleeve 6 and the second sliding sleeve 7 at the same time, the pressure of the control oil for opening the valve core 2 needs to be further reduced against the spring 3, and thus hydraulic control opening under the low control pressure gear is completed.
When the hydraulic control one-way valve is used in the hydraulic prop, only the pressure of the control oil way communicated with the control port is required to be unchanged, and when the hydraulic control one-way valve needs to be controlled to be opened, all the hydraulic control one-way valves cannot be opened through the pressure of the control oil way with a single size because the load borne by the hydraulic control one-way valve is changed, at the moment, the pressure of the control oil way does not need to be regulated, and all the hydraulic control one-way valves can be opened under the condition of keeping the hydraulic control pressure unchanged by regulating the control pressure gear of the hydraulic control one-way valve in the embodiment, so that the required action is completed.

Claims (10)

1. The hydraulic control one-way valve is characterized by comprising a valve body, a valve core, a spring, a push rod, a piston and a sliding sleeve; the valve body is provided with an inlet, an outlet and a control port, the valve core is positioned between the inlet and the outlet, the spring is connected with the valve core, and the spring can drive the valve core to move to cut off the communication between the inlet and the outlet; the push rod is connected in a sliding manner in the valve body and can push the valve core to overcome the spring and move to be communicated with the inlet and the outlet; the piston and the sliding sleeve are coaxially and relatively connected in a sliding manner in the valve body, and are positioned at one end of the push rod far away from the valve core; the control port can be communicated with the upper end of the piston to output control oil to drive the piston to push the push rod to drive the valve core; the control port can be communicated with the upper end of the sliding sleeve so as to output control oil to drive the sliding sleeve to push the push rod to drive the valve core.
2. The pilot-operated check valve of claim 1, further comprising a rotating shaft; the rotary shaft is rotationally connected to the inside of the valve body, and the piston and the sliding sleeve are slidingly connected to the lower end of the rotary shaft; the rotary shaft is provided with a flow passage, and the communication relation between the control port and the upper end of the piston and the communication relation between the control port and the upper end of the sliding sleeve can be controlled along with the rotation of the rotary shaft.
3. The hydraulically controlled one-way valve of claim 2, wherein the rotating shaft is provided with a piston inlet channel and a piston outlet channel; one end of the piston inlet channel is selectively communicated with the control port, and the other end of the piston inlet channel is communicated with the upper end of the piston; one end of the piston outlet channel is communicated with the upper end of the piston, and the other end of the piston outlet channel is selectively communicated with the lower end of the piston; when the rotating shaft rotates to the state that the piston inlet channel is communicated with the control port, the piston outlet channel is disconnected with the lower end of the piston.
4. The hydraulic control one-way valve according to claim 3, wherein the rotating shaft is provided with a sliding sleeve inlet flow passage and a sliding sleeve outlet flow passage; one end of the sliding sleeve inlet channel is selectively communicated with the control port, and the other end of the sliding sleeve inlet channel is communicated with the upper end of the sliding sleeve; one end of the sliding sleeve outlet channel is communicated with the upper end of the sliding sleeve, and the other end of the sliding sleeve outlet channel is selectively communicated with the lower end of the sliding sleeve; when the rotating shaft rotates to the state that the sliding sleeve inflow channel is communicated with the control port, the sliding sleeve outflow channel is disconnected with the lower end of the sliding sleeve.
5. The pilot operated check valve of claim 4, wherein an upper end of the piston and an upper end of the sliding sleeve are located at different cross sections along an axial direction of the rotation shaft, and the rotation shaft is rotatable to the control port while communicating with the piston inlet passage and the sliding sleeve inlet passage.
6. The pilot operated check valve of claim 5, wherein the inner surface of the valve body is provided with a control arcuate slot, a piston arcuate slot, a sliding sleeve arcuate slot and a connecting flow passage along the axial direction; the control arc-shaped groove is communicated with the control port and covers the sections of the piston inlet channel and the sliding sleeve inlet channel; the connecting runner extends to the lower end of the piston and the lower end of the sliding sleeve and is communicated with the piston arc-shaped groove and the sliding sleeve arc-shaped groove; the piston inlet channel and the sliding sleeve inlet channel can simultaneously rotate to be communicated with the control arc-shaped groove, and the piston outlet channel and the sliding sleeve outlet channel are respectively disconnected with the piston arc-shaped groove and the sliding sleeve arc-shaped groove.
7. The pilot operated check valve of claim 2, wherein an upper end of the rotary shaft serves as a driving end and extends to an outside of the valve body.
8. The hydraulically operated check valve of claim 7, wherein the end face of the upper end of the rotating shaft is provided with an internal hexagon.
9. The pilot operated check valve of claim 1, wherein the pilot operated check valve comprises a plurality of sliding sleeves; the sliding sleeves are sequentially sleeved and connected with each other and can perform relative reciprocating movement so as to push the push rods respectively.
10. The hydraulically controlled one-way valve of claim 1, wherein the pushrod is provided with a balancing flow passage; the balance runner is communicated with the upper end of the push rod and the lower end of the push rod.
CN202310303647.0A 2023-03-27 2023-03-27 Hydraulic control one-way valve Pending CN116146752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310303647.0A CN116146752A (en) 2023-03-27 2023-03-27 Hydraulic control one-way valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310303647.0A CN116146752A (en) 2023-03-27 2023-03-27 Hydraulic control one-way valve

Publications (1)

Publication Number Publication Date
CN116146752A true CN116146752A (en) 2023-05-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310303647.0A Pending CN116146752A (en) 2023-03-27 2023-03-27 Hydraulic control one-way valve

Country Status (1)

Country Link
CN (1) CN116146752A (en)

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