one-way valve

Abstract

This disclosure provides a one-way valve, comprising a valve body, a one-way valve core assembly, and a locking valve core assembly. The valve body has an oil inlet, an oil outlet, a first accommodating cavity, and a second accommodating cavity. The locking valve core assembly is partially located in the second accommodating cavity. The locking valve core assembly is configured to: when the oil pressure at the oil inlet is not higher than a threshold value, be located at a first end of the second accommodating cavity to block the first end of the second accommodating cavity; and when the oil pressure at the oil inlet is higher than the threshold value, move towards a second end of the second accommodating cavity under the drive of oil, so that the first end of the first accommodating cavity communicates with the oil inlet. The one-way valve core assembly is located in the first accommodating cavity, and when the first end of the first accommodating cavity is not connected to the oil inlet, move to the first end of the first accommodating cavity to cut off the connection between the oil inlet and the oil outlet. This disclosure can improve the service life of the one-way valve.

Description

Technical Field

[0001] This disclosure belongs to the field of hydraulic valve technology, and specifically relates to a check valve. Background Technology

[0002] One-way valves, as valves that allow one-way flow, are widely used in control systems of various devices.

[0003] In related technologies, a check valve includes a valve body and a valve core assembly. The valve body has an inlet and an outlet on opposite sides. The valve core assembly is movably located within the valve body. When the inlet pressure is greater than the outlet pressure, the oil pushes the valve core assembly to move, connecting the inlet and outlet, thus opening the check valve. When the outlet pressure is greater than the inlet pressure, the oil pushes the valve core assembly to block the inlet, disconnecting the inlet and outlet, thus closing the check valve.

[0004] However, when a check valve is opened, as long as the oil pressure at the inlet of the check valve is greater than the oil pressure at the outlet, the oil can push the valve core assembly to move and thus open the check valve. Therefore, when the check valve is opened, the oil pressure and flow rate at the inlet suddenly increase from zero, and correspondingly, the oil pressure and flow rate at the outlet also suddenly increase. This results in a strong hydraulic shock to the check valve, affecting its service life. Summary of the Invention

[0005] This disclosure provides a one-way valve that can improve its service life. The technical solution is as follows:

[0006] This disclosure provides a one-way valve, comprising a valve body, a one-way valve core assembly, and a locking valve core assembly. The valve body has an oil inlet, an oil outlet, a first accommodating cavity, and a second accommodating cavity. A first end of the first accommodating cavity is connected to a first end of the second accommodating cavity, and a second end of the first accommodating cavity is connected to the oil outlet. The oil inlet is connected to the second accommodating cavity. The locking valve core assembly is partially located in the second accommodating cavity and connected to the valve body. The locking valve core assembly is configured to: when the oil pressure at the oil inlet is not higher than a threshold value, it is located at the first end of the second accommodating cavity to block the first end of the second accommodating cavity. One end, and when the oil pressure at the oil inlet is higher than the threshold, moves towards the second end of the second accommodating cavity under the drive of the oil, so that the first end of the first accommodating cavity is connected to the oil inlet; the one-way valve core assembly is located in the first accommodating cavity, and the one-way valve core assembly is configured to: when the first end of the first accommodating cavity is connected to the oil inlet, move towards the second end of the first accommodating cavity under the drive of the oil, so that the oil inlet is connected to the oil outlet, and when the first end of the first accommodating cavity is not connected to the oil inlet, move to the first end of the first accommodating cavity to cut off the oil inlet and the oil outlet.

[0007] In another implementation of this disclosure, the locking valve core assembly includes a locking valve core and a locking reset member; one end of the locking valve core is located in the second accommodating cavity and is used to block the first end of the second accommodating cavity, the other end of the locking valve core is located outside the valve body, the locking valve core is movable relative to the valve body, and the direction of movement of the locking valve core is the alignment direction of the first accommodating cavity and the second accommodating cavity; the locking reset member is located in the second accommodating cavity and is sleeved on the outer wall of the locking valve core near the second end, and both ends of the locking reset member abut against the locking valve core and the valve body respectively, so that when the oil pressure at the oil inlet is not higher than the threshold, the locking valve core is reset to the first end of the second accommodating cavity.

[0008] In another implementation of this disclosure, the locking valve core includes a valve core body and a mating component; the mating component is located in the second accommodating cavity and sleeved on the valve core body, and the mating component is threadedly connected to the valve core body; the valve body also has a third accommodating cavity, the third accommodating cavity is located on one side of the second accommodating cavity and on the side of the oil inlet away from the first accommodating cavity, the first end of the third accommodating cavity is connected to the middle of the second accommodating cavity, and the second end of the third accommodating cavity is connected to the oil inlet; the locking valve core assembly further includes a limiting component, the limiting component is telescopically located in the third accommodating cavity and the second accommodating cavity, and is located on one side of the valve core body, the telescopic direction of the limiting component is perpendicular to the moving direction of the locking valve core; when the oil pressure at the oil inlet is not higher than the threshold, the limiting component is located in the third accommodating cavity, and when the oil pressure at the oil inlet is higher than the threshold, at least a portion of the limiting component is located in the second accommodating cavity and abuts against the side of the mating component facing the first accommodating cavity.

[0009] In another implementation of this disclosure, the limiting member includes a sliding member and a lifting and resetting member. The sliding member is movably located in the third accommodating cavity and the second accommodating cavity, and the moving direction of the sliding member is perpendicular to the moving direction of the locking valve core. The lifting and resetting member is sleeved on the sliding member, and both ends of the lifting and resetting member along the moving direction of the sliding member are clamped between the sliding member and the valve body. The lifting and resetting member is used to limit the sliding member in the third accommodating cavity when the oil pressure in the third accommodating cavity is not higher than the threshold value.

[0010] In another implementation of this disclosure, the sliding member has a guide slope on one side facing the first accommodating cavity, and the distance from the guide slope to the locking valve core gradually decreases along the direction from the first accommodating cavity to the second accommodating cavity.

[0011] In another implementation of this disclosure, there are multiple third accommodating cavities, which are divided into two parts along the moving direction perpendicular to the locking valve core, and the two parts are located on opposite sides of the second accommodating cavity; each third accommodating cavity contains one limiting member.

[0012] In another implementation of this disclosure, the valve core body includes a valve core head and a valve core rod; the valve core head is sleeved on one end of the valve core rod and is used to block the first end of the second accommodating cavity; the other end of the valve core rod is located outside the valve body; the middle part of the valve core rod is threadedly connected to a mating part.

[0013] In another implementation of this disclosure, the end of the valve core head facing the valve core rod is a cone, the end of the cone with a smaller end face area is connected to the valve core rod, and when the valve core head blocks the first end of the second accommodating cavity, the cone is located on the side of the oil inlet closer to the first accommodating cavity.

[0014] In another implementation of this disclosure, the valve core body further includes an isolation plate. Along the moving direction of the valve core body, the isolation plate is located between the oil inlet and the mating part. The isolation plate is sealed outside the middle part of the valve core rod. The isolation plate is in sliding contact with the valve core rod and is connected to the valve body.

[0015] In another implementation of this disclosure, the inner cavity of the first end of the first accommodating cavity is a conical structure, and the inner diameter of the first end of the first accommodating cavity gradually decreases along the direction toward the second accommodating cavity.

[0016] The beneficial effects of the technical solutions provided in this disclosure are:

[0017] When the one-way valve needs to be opened, the locking valve core assembly can be pre-controlled (e.g., manually operated) to move towards the second end of the second receiving cavity, causing the locking valve core assembly to move away from the first end of the second receiving cavity. The first end of the first receiving cavity then connects to the oil inlet, allowing oil in the inlet to enter the first receiving cavity. After entering the first receiving cavity, the locking valve core assembly is configured to move towards the second end of the second receiving cavity under the drive of the oil when the oil pressure at the inlet is higher than a threshold, thus connecting the first end of the first receiving cavity to the oil inlet. Therefore, a portion of the oil drives the locking valve core assembly to move, connecting the first end of the first receiving cavity to the oil inlet. The one-way valve core assembly is configured to move towards the second end of the first receiving cavity under the drive of the oil when the first end of the first receiving cavity is connected to the oil inlet, connecting the inlet to the outlet. Therefore, after the first end of the first receiving cavity is connected to the oil inlet, the oil drives the one-way valve core assembly to move, connecting the inlet and outlet. In this way, when the oil pressure at the inlet is higher than the threshold, the locking valve core assembly can be activated by the locking valve core assembly, which in turn pushes the check valve core assembly to move. This allows a portion of the oil pressure to be borne by the locking valve core assembly, thereby reducing the pressure impact on the check valve core assembly and extending the service life of the check valve.

[0018] When there is no oil pressure at the inlet, the locking valve assembly can reset to the first end of the second accommodating cavity, thus blocking the first end of the second accommodating cavity and preventing communication between the second accommodating cavity and the inlet. This also prevents communication between the inlet and the first accommodating cavity. When the inlet and the first accommodating cavity are not connected, the one-way valve assembly resets to the first end of the first accommodating cavity, blocking the first end port and preventing communication between the inlet and outlet. Therefore, the one-way valve closes when the oil pressure at the inlet is not higher than the threshold value.

[0019] The check valve provided in this embodiment can not only reduce oil pressure surges by distributing the oil pressure when the oil pressure at the inlet is higher than a threshold through locking the valve core assembly, but also close the check valve when the oil pressure at the inlet is not higher than the threshold, thereby extending the service life of the check valve and improving its safety and reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a one-way valve provided in an embodiment of the present disclosure;

[0022] Figure 2 This is a structural schematic diagram of the mating parts;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure corresponding to the extreme positions of the locking valve core within the valve body;

[0024] Figure 4 This is a schematic diagram of the sliding component;

[0025] Figure 5 This is a schematic diagram of the valve core head structure;

[0026] Figure 6 This is a schematic diagram of the valve core rod.

[0027] Figure 7 This is a schematic diagram of the isolation plate structure;

[0028] Figure 8 This is a schematic diagram of the valve body structure;

[0029] Figure 9 This is a schematic diagram of the valve seat structure;

[0030] Figure 10 for Figure 9 A sectional view;

[0031] Figure 11 This is a schematic diagram of the one-way valve core.

[0032] The symbols in the diagram represent the following meanings:

[0033] 1. Valve body; 101. Oil inlet; 102. Oil outlet; 103. First accommodating cavity; 104. Second accommodating cavity; 105. Third accommodating cavity; 106. Annular through groove; 107. Connecting oil passage; 11. Valve seat; 110. Waist-shaped hole; 1100. Valve seat hole; 12. Valve block; 13. End cap;

[0034] 2. One-way valve core assembly; 21. One-way valve core; 210. Pressure equalizing groove; 211. Sealing bevel; 22. One-way reset component;

[0035] 4. Locking valve core assembly; 41. Locking valve core; 411. Valve core body; 4111. Valve core head; 4110. Conical body; 41110. Inner bore; 41111. Sealing ring platform; 4112. Valve core rod; 41121. Shoulder; 41122. Threaded section; 41123. Connecting section; 4113. Isolation plate; 41131. Boss; 41132. Baffle; 41130 4115. Isolation perforation; 4116. Locking cover; 4117. Handwheel; 4118. Locking nut; 412. Mating part; 4120. Threaded hole; 4121. Spring groove; 43. Locking reset part; 44. Limiting part; 441. Sliding part; 4411. Top plate; 4412. Guide post; 4413. Protrusion; 4410. Guide slope; 442. Lifting reset part; 443. Plug. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0037] This disclosure provides a one-way valve, such as Figure 1 As shown, the one-way valve includes a valve body 1, a one-way valve core assembly 2, and a locking valve core assembly 4. The valve body 1 has an oil inlet 101, an oil outlet 102, a first accommodating cavity 103, and a second accommodating cavity 104. The first accommodating cavity 103 and the second accommodating cavity 104 are arranged sequentially, and the oil inlet 101 and the oil outlet 102 are spaced apart from each other.

[0038] The first end of the first accommodating cavity 103 is connected to the first end of the second accommodating cavity 104, the second end of the first accommodating cavity 103 is connected to the oil outlet 102, and the oil inlet 101 is connected to the second accommodating cavity 104.

[0039] The locking valve core assembly 4 is located in the second accommodating cavity 104 and connected to the valve body 1. The locking valve core assembly 4 is configured to: when the oil pressure at the oil inlet 101 is not higher than the threshold, it is located at the first end of the second accommodating cavity 104 to block the first end of the second accommodating cavity 104; and when the oil pressure at the oil inlet 101 is higher than the threshold, it moves towards the second end of the second accommodating cavity 104 under the drive of the oil, so that the first end of the first accommodating cavity 103 is connected to the oil inlet 101.

[0040] The one-way valve core assembly 2 is located in the first accommodating cavity 103. The one-way valve core assembly 2 is configured to: when the first end of the first accommodating cavity 103 is connected to the oil inlet 101, move towards the second end of the first accommodating cavity 103 under the drive of the oil, so that the oil inlet 101 is connected to the oil outlet 102; and when the first accommodating cavity 103 is not connected to the oil inlet 101, move to the first end of the first accommodating cavity 103 to cut off the oil inlet 101 and the oil outlet 102.

[0041] When using the one-way valve provided in the embodiments of this disclosure, since the one-way valve includes a valve body 1, a one-way valve core assembly 2 and a locking valve core assembly 4, the valve body 1 can provide an installation base for the one-way valve core assembly 2 and the locking valve core assembly 4.

[0042] Furthermore, the one-way valve core assembly 2 is movably located in the first accommodating cavity 103 along the arrangement direction of the first accommodating cavity 103 and the second accommodating cavity 104. When the first end of the first accommodating cavity 103 is connected to the oil inlet 101, the one-way valve core assembly 2 moves towards the second end of the first accommodating cavity 103, thereby connecting the oil inlet 101 with the oil outlet 102. When the first accommodating cavity 103 is not connected to the oil inlet 101, the one-way valve core assembly 2 moves to the first end of the first accommodating cavity 103 to cut off the connection between the oil inlet 101 and the oil outlet 102. In this way, the connection between the oil inlet 101 and the oil outlet 102 can be controlled by controlling the one-way valve core assembly 2.

[0043] When the check valve needs to be opened, the locking valve core assembly 4 can be pre-controlled (e.g., manually operated) to move towards the second end of the second receiving cavity 104, causing the locking valve core assembly 4 to move away from the first end of the second receiving cavity 104. The first end of the first receiving cavity 103 then connects to the oil inlet 101, allowing the oil in the oil inlet 101 to enter the first receiving cavity 103. After entering the first receiving cavity 103, the locking valve core assembly 4 is configured to move towards the second end of the second receiving cavity 104 under the drive of the oil when the oil pressure at the oil inlet 101 is higher than a threshold, thus connecting the first end of the first receiving cavity 103 to the oil inlet 101. Therefore, a portion of the oil drives the locking valve core assembly 4 to move, connecting the first end of the first receiving cavity 103 to the oil inlet 101. The one-way valve core assembly 2 is configured such that when the first end of the first accommodating cavity 103 is connected to the oil inlet 101, it moves towards the second end of the first accommodating cavity 103 under the drive of the oil, so that the oil inlet 101 is connected to the oil outlet 102. Therefore, after the first end of the first accommodating cavity 103 is connected to the oil inlet 101, the oil drives the one-way valve core assembly 2 to move, so that the oil inlet 101 is connected to the oil outlet 102. In this way, the above one-way valve can push the locking valve core assembly 4 to move when the oil pressure at the oil inlet is higher than the threshold, and push the one-way valve core assembly 2, so that a part of the oil pressure can be borne by the locking valve core assembly 4, so as to reduce the pressure impact acting on the one-way valve core assembly 2 and extend the service life of the one-way valve.

[0044] When there is no oil pressure at the oil inlet 101, the locking valve core assembly 4 can reset to the first end of the second accommodating cavity 104, thus blocking the first end of the second accommodating cavity 104 and preventing communication between the second accommodating cavity 104 and the oil inlet 101. This also prevents communication between the oil inlet 101 and the first accommodating cavity 103. When the oil inlet 101 and the first accommodating cavity 103 are not connected, the one-way valve core assembly 2 resets to the first end of the first accommodating cavity 103, blocking the port at the first end of the first accommodating cavity 103, preventing communication between the oil inlet 101 and the oil outlet 102. Therefore, the one-way valve closes when the oil pressure at the oil inlet 101 is not higher than the threshold value.

[0045] The one-way valve provided in this embodiment can not only reduce oil pressure shock by locking the valve core assembly 4 to distribute the oil pressure when the oil pressure at the inlet 101 is higher than the threshold, but also lock the one-way valve to close it when the oil pressure at the inlet 101 is not higher than the threshold, thereby extending the service life of the one-way valve and improving its safety and reliability.

[0046] Optionally, the locking valve core assembly 4 includes a locking valve core 41 and a locking reset member 43. One end of the locking valve core 41 is located in the second accommodating cavity 104 and is used to block the first end of the second accommodating cavity 104. The other end of the locking valve core 41 is located outside the valve body 1. The locking valve core 41 can move relative to the valve body 1. The direction of movement of the locking valve core 41 is the alignment direction of the first accommodating cavity 103 and the second accommodating cavity 104.

[0047] The locking reset member 43 is located in the second accommodating cavity 104 and is sleeved on the outer wall of the locking valve core 41 near the second end. The two ends of the locking reset member 43 abut against the locking valve core 41 and the valve body 1 respectively, so that when the oil pressure at the oil inlet 101 is not higher than the threshold, the locking valve core 41 is reset to the first end of the second accommodating cavity 104.

[0048] In the above implementation, the locking valve core 41 is used to block or unblock the first end of the second accommodating cavity 104, so that the one-way valve can be closed or opened. The locking reset member 43 is used to enable the locking valve core 41 to automatically reset and re-block the first end of the second accommodating cavity 104 after the locking valve core 41 moves under the action of external force, so that the one-way valve closes again.

[0049] In this embodiment, the locking reset component 43 is a telescopic spring.

[0050] Optionally, the locking valve core 41 includes a valve core body 411 and a mating part 412. The mating part 412 is located in the second accommodating cavity 104 and is sleeved outside the valve core body 411. The mating part 412 is threadedly connected to the valve core body 411.

[0051] The valve body 1 also has a third accommodating cavity 105, which is located on one side of the second accommodating cavity 104 and on the side of the oil inlet 101 away from the first accommodating cavity 103. The first end of the third accommodating cavity 105 is connected to the middle part of the second accommodating cavity 104, and the second end of the third accommodating cavity 105 is connected to the oil inlet 101.

[0052] The locking valve core assembly 4 also includes a limiting member 44, which is telescopically located in the third accommodating cavity 105 and the second accommodating cavity 104 and is located on one side of the valve core body 411. The telescopic direction of the limiting member 44 is perpendicular to the moving direction of the locking valve core 41.

[0053] When the oil pressure at the inlet 101 is not higher than the threshold, the limiting member 44 is located in the third accommodating cavity 105, and when the oil pressure at the inlet 101 is higher than the threshold, the limiting member 44 is at least partially located in the second accommodating cavity 104 and abuts against the side of the mating member 412 facing the first accommodating cavity 103.

[0054] In the above implementation, the third accommodating cavity 105 provides a mounting base for the limiting member 44 and also introduces oil from the oil inlet 101 into the third accommodating cavity 105. This allows the limiting member 44 to move into the second accommodating cavity 104 to abut against the mating member 412 on the side facing the first accommodating cavity 103 when the oil pressure at the oil inlet 101 is higher than a threshold, enabling the valve core body 411 to move relative to the mating member 412. Simultaneously, when the oil pressure at the oil inlet 101 is not higher than the threshold, the limiting member 44 is entirely located in the third accommodating cavity 105 and does not limit the mating member 412, allowing the mating member 412 to move synchronously with the valve core body 411.

[0055] In this embodiment, to facilitate communication between the third accommodating cavity 105 and the oil inlet 101, the valve body 1 also has an annular groove 106 and a connecting oil passage 107 inside. One radial side of the annular groove 106 communicates with the oil inlet 101. The connecting oil passage 107 is located on the side of the annular groove 106 away from the first accommodating cavity 103. One end of the connecting oil passage 107 communicates with the annular groove 106, and the other end of the connecting oil passage 107 communicates with the corresponding third accommodating cavity 105.

[0056] Figure 2 This is a structural diagram of the mating parts, combined with Figure 2 Optionally, the mating part 412 is a rectangular plate with a threaded hole 4120 in the middle. The threaded hole 4120 is threadedly connected to the outer wall of the valve core body 411, and the outer wall of the mating part 412 slides in contact with the cavity wall of the second accommodating cavity 104. By setting the mating part 412 as a rectangular plate, the mating part 412 will not rotate, but can only move linearly in the second accommodating cavity 104. This ensures that when the valve core body 411 rotates, it will not cause the mating part 412 to rotate, but rather the mating part 412 can only move under the action of the thread.

[0057] In this embodiment, the locking reset member 43 is a telescopic spring. The mating member 412 has an annular spring groove 4121 on the side facing the locking reset member 43, and the spring groove 4121 is located outside the threaded hole 4120. The spring groove 4121 is used to accommodate one end of the locking reset member 43.

[0058] See also Figure 1 Optionally, the limiting member 44 includes a sliding member 441 and a lifting and resetting member 442. The sliding member 441 is movably located in the third accommodating cavity 105 and the second accommodating cavity 104, and the moving direction of the sliding member 441 is perpendicular to the moving direction of the locking valve core 41.

[0059] The lifting reset member 442 is sleeved outside the sliding member 441, and the two ends of the lifting reset member 442 along the moving direction of the sliding member 441 are clamped between the sliding member 441 and the valve body 1. The lifting reset member 442 is used to limit the sliding member 441 in the third accommodating cavity 105 when the oil pressure in the third accommodating cavity 105 is not higher than the threshold.

[0060] In the above implementation, the third accommodating cavity 105 can introduce oil pressure from the oil inlet 101 into the third accommodating cavity 105, so that the oil can push a portion of the sliding member 441 to move into the second accommodating cavity 104. The lifting and resetting member 442 is used to limit the sliding member 441 in the third accommodating cavity 105 when the oil pressure in the third accommodating cavity 105 is lower than a threshold, so that the sliding member 441 will not extend into the second accommodating cavity 104.

[0061] In this embodiment, the limiting member 44 further includes a screw plug 443, which is located within the third accommodating cavity 105 and threadedly connected to the valve body 1. The screw plug 443 is used to seal the end of the third accommodating cavity 105 away from the second accommodating cavity 104. There is a space between the screw plug 443 and the sliding member 441 for accommodating oil.

[0062] Combination Figure 1 Optionally, there are multiple third receiving cavities 105, which are divided into two parts along the movement direction perpendicular to the locking valve core 41. The two parts of the third receiving cavities 105 are located on opposite sides of the second receiving cavity 104. There are multiple connecting oil passages 107, which are connected to the multiple third receiving cavities 105 one by one. There are multiple limiting members 44, which are connected to the multiple third receiving cavities 105 one by one, with one limiting member 44 in each third receiving cavity 105.

[0063] In the above implementation, multiple limiting members 44 can further increase the limiting ability of the limiting members 44 on the mating member 412.

[0064] In this embodiment, there are two limiting members 44, which are symmetrically distributed on opposite sides of the second accommodating cavity 104.

[0065] Figure 3 for Figure 1 A schematic diagram showing the structure of the locking valve core at its extreme positions within the valve body, combined with... Figure 3 When the oil pressure at the oil inlet 101 is not higher than the threshold, the mating part 412 is located on the side of the sliding part 441 facing the first accommodating cavity 103.

[0066] The sliding member 441 has a guide slope 4410 on one side facing the first accommodating cavity 103. Along the direction from the first accommodating cavity 103 to the second accommodating cavity 104, the distance from the guide slope 4410 to the locking valve core 41 gradually decreases.

[0067] In the above implementation, the mating part 412 is threadedly connected to the valve core body 411. When the valve core body 411 is rotated, the mating part 412 and the valve core body 411 will move relative to each other. As a result, under the limitation of the sliding part 441, after the valve core body 411 rotates, the valve core body 411 will move linearly relative to the mating part 412, thereby realizing the movement of the valve core body 411 toward the second end of the second accommodating cavity 104.

[0068] While the valve core body 411 blocks the first end of the second accommodating cavity 104, the mating part 412 is located on the side of the sliding part 441 facing the first accommodating cavity 103. This ensures that when the check valve is closed and the locking valve core 41 blocks the first end of the second accommodating cavity 104, the mating part 412 is limited by the sliding part 441. The locking valve core 41 continuously blocks the first end of the second accommodating cavity 104, preventing it from shifting when subjected to a push-pull force, thus improving the locking effect of the check valve. Only under the action of torque can the locking valve core 41 be unlocked after rotation. The guide ramp 4410 allows the mating part 412 to move more smoothly from the side of the sliding part 441 facing the first accommodating cavity 103 to the other side.

[0069] Figure 4 This is a structural schematic diagram of the sliding component, combined with... Figure 4 Optionally, the sliding member 441 includes a circular top plate 4411, a guide post 4412, and a protrusion 4413. The guide post 4412 and the protrusion 4413 are located on opposite surfaces of the top plate 4411, and are connected to the top plate 4411. The outer peripheral wall of the top plate 4411 is in sliding contact with the inner wall of the third accommodating cavity 105. The lifting and resetting member 442 is sleeved on the guide post 4412. One end of the lifting and resetting member 442 abuts against the top plate 4411, and the other end abuts against the inner wall of the third accommodating cavity 105. The protrusion 4413 is used to contact the screw plug 443. The guide ramp 4410 is located at the end of the guide post 4412 away from the top plate 4411.

[0070] In the above implementation, the top plate 4411 is used to slide in contact with the inner wall of the third accommodating cavity 105 to limit the movement of the sliding member 441, so that the sliding member 441 can only move along the extension direction of the third accommodating cavity 105. The protrusion 4413 is used to contact the screw plug 443, so that there is a gap between the top plate 4411 and the screw plug 443, so that oil can enter into the space between the top plate 4411 and the screw plug 443. In this way, the oil can act on the top plate 4411 to push the top plate 4411 to move. The guide post 4412 is used to provide a mounting base for the lifting and resetting member 442, and at the same time, it prevents the lifting and resetting member 442 from bending, but can only extend and retract along the movement direction of the sliding member 441.

[0071] In this embodiment, the sliding member 441 is an integral structural component.

[0072] See you again Figure 1 or Figure 3 Optionally, the valve core body 411 includes a valve core head 4111 and a valve core rod 4112. The valve core head 4111 is sleeved on one end of the valve core rod 4112 and is used to block the first end of the second accommodating cavity 104. The other end of the valve core rod 4112 is located outside the valve body 1. The middle part of the valve core rod 4112 is threadedly connected to the mating part 412.

[0073] In the above implementation, the valve core head 4111 is used to block the first end of the second accommodating cavity 104. The valve core rod 4112 is used to rotate under the action of external force so as to drive the valve core head 4111 to move.

[0074] Figure 5 This is a schematic diagram of the valve core head structure, combined with... Figure 5 In this embodiment, the end of the valve core head 4111 facing the valve core rod 4112 is a cone 4110. The end of the cone 4110 with a smaller end face area is connected to the valve core rod 4112. When the valve core head 4111 blocks the first end of the second accommodating cavity 104, the cone 4110 is located on the side of the oil inlet 101 close to the first accommodating cavity 103.

[0075] In the above implementation, since the end of the valve core head 4111 facing the valve core rod 4112 is a conical body 4110, and when the valve core head 4111 blocks the first end of the second accommodating cavity 104, the conical body 4110 is located on the side of the oil inlet 101 closer to the first accommodating cavity 103. Thus, when oil enters through the oil inlet 101, the oil flows along the outer wall of the conical body 4110 to the first end of the second accommodating cavity 104. As the oil flows along the outer wall of the conical body 4110 to the first end of the second accommodating cavity 104, the smaller end of the conical body 4110 faces the valve core rod 4112, thus reducing the flow area and achieving throttling and pressure reduction, further reducing pressure surges.

[0076] The valve core head 4111 has an inner hole 41110 on the side facing the mating part 412, which is used to accommodate the valve core rod 4112. The valve core head 4111 has a sealing ring platform 41111 on the side facing the first accommodating cavity 103. The inner diameter of the sealing ring platform 41111 is the same as the inner diameter of the port at the first end of the first accommodating cavity 103. The sealing ring platform 41111 is located outside the first accommodating cavity 103 and is used to contact the inner wall of the valve body 1 to seal the first end of the first accommodating cavity 103. By providing the sealing ring platform 41111, the volume of oil entering the first end of the first accommodating cavity 103 can be further increased through the inner cavity of the sealing ring platform 41111, thereby buffering the oil.

[0077] Figure 6 This is a structural diagram of the valve core rod, combined with... Figure 6 In this embodiment, the first end of the valve core rod 4112 is inserted into the inner hole 41110 of the valve core head 4111. The outer wall of the valve core rod 4112 near the first end has a shoulder 41121. The middle portion of the valve core rod 4112 has a threaded section 41122, which is used for threaded connection with the threaded hole 4120 of the mating part 412. The second end of the valve core rod 4112 is a connecting section 41123 with external threads. The outer diameter of the connecting section 41123 is smaller than the outer diameter of other parts of the valve core rod 4112.

[0078] Combination Figure 3 The valve core body 411 also includes a locking cover 4115, which is sleeved on the valve core rod 4112, and one side of the locking cover 4115 abuts against the shoulder 41121 and the valve core head 4111. The locking cover 4115 is used to lock and limit the valve core head 4111 on the valve core rod 4112.

[0079] Combination Figure 3 The valve core body 411 also includes a handwheel 4116 and a locking nut 4117. The handwheel 4116 is fitted over the connecting section 41123 and is engaged at the first end of the connecting section 41123. The locking nut 4117 is threaded onto the second end of the connecting section 41123 and is locked in place with the handwheel 4116. This allows the handwheel 4116 to be installed at the end of the valve core rod 4112, enabling operation of the valve core rod 4112 via the handwheel 4116.

[0080] Optionally, the locking valve core 41 also includes an isolation plate 4113. Along the moving direction of the valve core body 411, the isolation plate 4113 is located between the oil inlet 101 and the mating part 412. The isolation plate 4113 is sealed outside the middle part of the valve core rod 4112. The isolation plate 4113 is in sliding contact with the valve core rod 4112. The isolation plate 4113 is connected to the valve body 1.

[0081] In the above implementation, the isolation plate 4113 is used to isolate the oil entering the second accommodating cavity 104 through the oil inlet 101, so that the oil can only be located on the side of the isolation plate 4113 facing the first accommodating cavity 103, and does not enter between the isolation plate 4113 and the mating part 412, so as to prevent the oil from contaminating the mating part 412, etc.

[0082] Figure 7 This is a structural diagram of the isolation plate, combined with... Figure 7 In this embodiment, the partition plate 4113 includes a circular boss 41131 and a square baffle 41132. The boss 41131 is connected to the side of the baffle 41132 facing the first accommodating cavity 103. The boss 41131 is interference-fitted with the inner wall of the second accommodating cavity 104. The baffle 41132 is in contact with the inner wall of the second accommodating cavity 104.

[0083] In the above implementation, the boss 41131 is used to make an interference fit with the circular inner wall of the second accommodating cavity 104, and the baffle 41132 is used to fit against the square cavity wall of the second accommodating cavity 104. In this way, the baffle 41132 can be stopped and limited by the circular inner wall of the second accommodating cavity 104, so that the partition plate 4113 is firmly located in the second accommodating cavity 104 without moving.

[0084] The isolation plate 4113 has a circular isolation perforation 41130 in the middle, through which the valve core rod 4112 passes, and the wall of the isolation perforation 41130 is provided with a sealing groove for installing a sealing ring. A sealing ring is sandwiched between the isolation plate 4113 and the valve core rod 4112.

[0085] See you again Figure 1 Optionally, the one-way valve core assembly 2 includes a one-way valve core 21 and a one-way reset member 22. The one-way reset member 22 is sleeved outside the one-way valve core 21, and both ends of the one-way reset member 22 abut against the inner wall of the valve body 1. The extension and retraction direction of the one-way reset member 22 is the movement direction of the one-way valve core 21.

[0086] In the above implementation, the one-way valve core 21 is used to block the first end of the first accommodating cavity 103. The one-way reset member 22 is used to reset the one-way valve core 21.

[0087] Figure 8 This is a structural diagram of the valve body, combined with... Figure 8 Optionally, the inner cavity of the first end of the first accommodating cavity 103 is a conical structure, and the inner diameter of the first end of the first accommodating cavity 103 gradually decreases along the direction toward the second accommodating cavity 104.

[0088] In the above implementation, the setting of the conical opening can also reduce the flow area of ​​the oil, so that the oil can be further throttled and depressurized when flowing from the oil outlet 102, and the pressure shock can be further reduced.

[0089] Combination Figure 3 Optionally, the valve body 1 includes a valve seat 11, a valve block 12, and an end cap 13. The valve seat 11 and the end cap 13 are located on opposite sides of the valve block 12 along the moving direction of the one-way valve core 21, and are both detachably connected to the valve block 12.

[0090] In the above implementation, the valve seat 11 and end cap 13 are detachably connected to the valve block 12, which facilitates the installation of the one-way valve core assembly 2 and the locking valve core assembly 4 in the valve body 1.

[0091] Figure 9 This is a schematic diagram of the valve seat structure. Figure 10 for Figure 9 The sectional view, combined with Figure 9 and Figure 10 The valve seat 11 has a valve seat hole 1100 on the side facing the one-way valve core 21. One end of the one-way valve core 21 is inserted into the valve seat hole 1100, and the one-way valve core 21 abuts against the valve seat 11. The valve seat 11 has two oblong holes 110 on the side away from the one-way valve core 21. The two oblong holes 110 are used to connect the first receiving cavity 103 with the oil outlet 102.

[0092] Figure 11 This is a schematic diagram of the one-way valve core, combined with... Figure 11 The one-way valve core 21 is a T-shaped rod. The larger end of the one-way valve core 21 has a sealing slope 211, which is used to cooperate with the tapered opening of the first accommodating cavity 103.

[0093] The outer wall of the one-way valve core 21 has a plurality of annular pressure equalizing grooves 210 arranged at intervals along the length of the one-way valve core 21, and the plurality of pressure equalizing grooves 210 are coaxially arranged. The pressure equalizing grooves 210 are used for oil to flow in to lubricate the one-way valve core 21.

[0094] The working process of the one-way valve provided in this embodiment is briefly described below:

[0095] Combination Figure 3 When the one-way valve is fully closed, the one-way valve core 21 is tightly closed against the first end of the first accommodating cavity 103, and the locking valve core 41 is tightly closed against the first end of the second accommodating cavity 104. At this time, the sliding member 441 is located in the third accommodating cavity 105 under the action of the lifting and resetting member 442.

[0096] When the check valve is working, oil enters through the inlet 101 and flows into the third accommodating cavity 105. Under the action of the oil, the sliding member 441 overcomes the elastic force of the lifting reset member 442 and moves towards the second accommodating cavity 104, with a portion of the sliding member 441 extending into the second accommodating cavity 104. The valve core 41 is manually locked, and the valve core rod 4112 is rotated clockwise, causing the valve core head 4111 to continue pressing against the first end of the second accommodating cavity 104. Continuing to rotate the valve core rod 4112 clockwise, since the valve core head 4111 cannot move to the left, and the mating part 412 is threadedly connected to the valve core rod 4112, the mating part 412 overcomes the elastic force of the locking reset member 43 and moves to the right, pressing against the guide slope 4410 of the sliding member 441, causing the sliding member 441 to move away from the second accommodating cavity 104. Continue to rotate the valve core rod 4112 clockwise until the mating part 412 moves to the right past the sliding part 441, at which point the sliding part 441 extends back into the second accommodating cavity 104.

[0097] Combination Figure 1 Then, the rotation direction of the valve core rod 4112 is changed, and the mating part 412 is stuck by the sliding part 441 and cannot move. The valve core rod 4112 moves to the right, driving the valve core head 4111 to move to the right, and the second end of the second accommodating cavity 104 is no longer closed. The oil in the oil inlet 101 enters the first accommodating cavity 103, pushing the one-way valve core 21 to overcome the elastic force of the one-way reset part 22 and move to the left. The one-way valve opens, and the oil enters the first accommodating cavity 103 and is discharged from the oil outlet 102.

[0098] When the pressure oil at the inlet 101 is cut off, there is no more pressure oil supporting the third accommodating cavity 105. The lifting reset component 442 pushes the sliding component 441 away from the second accommodating cavity 104, and the locking fails. The locking reset component 43 pushes the mating component 412 to the left. The mating component 412, along with the valve core rod 4112 and the valve core head 4111, quickly moves to the left. The valve core head 4111 closes the first end of the second accommodating cavity 104, thus cutting off the connection between the inlet 101 and the first accommodating cavity 103.

[0099] When the check valve is used to flow oil in the reverse direction, the check valve core 21 cannot be opened. At the same time, the locking valve core 41 provides double protection, so the check valve cannot flow in the reverse direction.

[0100] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A one-way valve, characterized in that, The one-way valve includes a valve body (1), a one-way valve core assembly (2), and a locking valve core assembly (4). The valve body (1) has an oil inlet (101), an oil outlet (102), a first accommodating cavity (103), and a second accommodating cavity (104). The first end of the first accommodating cavity (103) is connected to the first end of the second accommodating cavity (104), the second end of the first accommodating cavity (103) is connected to the oil outlet (102), and the oil inlet (101) is connected to the second accommodating cavity (104). The locking valve core assembly (4) is partially located in the second accommodating cavity (104) and is connected to the valve body (1); The one-way valve core assembly (2) is located in the first accommodating cavity (103). The one-way valve core assembly (2) is configured to: when the first end of the first accommodating cavity (103) is connected to the oil inlet (101), move towards the second end of the first accommodating cavity (103) under the drive of the oil, so that the oil inlet (101) is connected to the oil outlet (102); and when the first end of the first accommodating cavity (103) is not connected to the oil inlet (101), move to the first end of the first accommodating cavity (103) to cut off the oil inlet (101) and the oil outlet (102). When the one-way valve is opened, the locking valve core assembly (4) is pre-controlled to move toward the second end of the second accommodating cavity (104), so that the locking valve core assembly (4) moves away from the first end of the second accommodating cavity (104). The first end of the first accommodating cavity (103) is connected to the oil inlet (101), and the oil in the oil inlet (101) can enter the first accommodating cavity (103). When there is no oil pressure in the oil inlet (101), the locking valve core assembly (4) can be reset to the first end of the second accommodating cavity (104) to block the first end of the second accommodating cavity (104), so that the second accommodating cavity (104) is not connected to the oil inlet (101).

2. The one-way valve according to claim 1, characterized in that, The locking valve core assembly (4) includes a locking valve core (41) and a locking reset component (43). One end of the locking valve core (41) is located in the second accommodating cavity (104) and is used to block the first end of the second accommodating cavity (104). The other end of the locking valve core (41) is located outside the valve body (1). The locking valve core (41) can move relative to the valve body (1). The direction of movement of the locking valve core (41) is the arrangement direction of the first accommodating cavity (103) and the second accommodating cavity (104). The locking reset member (43) is located in the second accommodating cavity (104) and is sleeved on the outer wall of the locking valve core (41) near the second end. The two ends of the locking reset member (43) abut against the locking valve core (41) and the valve body (1) respectively, so that when the oil pressure at the oil inlet (101) is not higher than the threshold, the locking valve core (41) is reset to the first end of the second accommodating cavity (104).

3. The one-way valve according to claim 2, characterized in that, The locking valve core (41) includes a valve core body (411) and a mating part (412). The mating part (412) is located in the second accommodating cavity (104) and is sleeved outside the valve core body (411). The mating part (412) is threadedly connected to the valve core body (411). The valve body (1) also has a third accommodating cavity (105), which is located on one side of the second accommodating cavity (104) and on the side of the oil inlet (101) away from the first accommodating cavity (103). The first end of the third accommodating cavity (105) is connected to the middle of the second accommodating cavity (104), and the second end of the third accommodating cavity (105) is connected to the oil inlet (101). The locking valve core assembly (4) further includes a limiting member (44), which is telescopically located in the third accommodating cavity (105) and the second accommodating cavity (104) and located on one side of the valve core body (411). The telescopic direction of the limiting member (44) is perpendicular to the moving direction of the locking valve core (41). When the oil pressure at the oil inlet (101) is not higher than the threshold, the limiting member (44) is located in the third accommodating cavity (105), and when the oil pressure at the oil inlet (101) is higher than the threshold, at least a portion of the limiting member (44) is located in the second accommodating cavity (104) and abuts against the side of the mating member (412) facing the first accommodating cavity (103).

4. The one-way valve according to claim 3, characterized in that, The limiting member (44) includes a sliding member (441) and a lifting and resetting member (442). The sliding member (441) is movably located in the third accommodating cavity (105) and the second accommodating cavity (104), and the moving direction of the sliding member (441) is perpendicular to the moving direction of the locking valve core (41). The lifting reset member (442) is sleeved outside the sliding member (441), and the two ends of the lifting reset member (442) along the moving direction of the sliding member (441) are clamped between the sliding member (441) and the valve body (1). The lifting reset member (442) is used to limit the sliding member (441) in the third accommodating cavity (105) when the oil pressure in the third accommodating cavity (105) is not higher than the threshold.

5. The one-way valve according to claim 4, characterized in that, The sliding member (441) has a guide slope (4410) on one side facing the first accommodating cavity (103), and the distance from the guide slope (4410) to the locking valve core (41) gradually decreases along the direction from the first accommodating cavity (103) to the second accommodating cavity (104).

6. The one-way valve according to claim 3, characterized in that, There are multiple third accommodating cavities (105), and the multiple third accommodating cavities (105) are divided into two parts along the moving direction perpendicular to the locking valve core (41), and the two parts are respectively located on opposite sides of the second accommodating cavity (104); Each of the third accommodating cavities (105) contains one of the limiting members (44).

7. The one-way valve according to claim 3, characterized in that, The valve core body (411) includes a valve core head (4111) and a valve core rod (4112). The valve core head (4111) is sleeved on one end of the valve core rod (4112), and the valve core head (4111) is used to block the first end of the second accommodating cavity (104). The other end of the valve core rod (4112) is located outside the valve body (1). The valve core rod (4112) is threadedly connected to the mating part (412) at its middle part.

8. The one-way valve according to claim 7, characterized in that, The valve core head (4111) has a conical body (4110) facing the valve core rod (4112). The end of the conical body (4110) with a smaller end face area is connected to the valve core rod (4112). When the valve core head (4111) blocks the first end of the second accommodating cavity (104), the conical body (4110) is located on the side of the oil inlet (101) close to the first accommodating cavity (103).

9. The one-way valve according to claim 8, characterized in that, The valve core body (411) also includes an isolation plate (4113). Along the moving direction of the valve core body (411), the isolation plate (4113) is located between the oil inlet (101) and the mating part (412). The isolation plate (4113) is sealed outside the middle part of the valve core rod (4112). The isolation plate (4113) is in sliding contact with the valve core rod (4112). The isolation plate (4113) is connected to the valve body (1).

10. The check valve according to any one of claims 1-9, characterized in that, The inner cavity of the first end of the first accommodating cavity (103) is a conical structure, and the inner diameter of the first end of the first accommodating cavity (103) gradually decreases along the direction toward the second accommodating cavity (104).

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