One-way valve

Abstract

The invention provides a one-way valve. The one-way valve comprises a valve body, a one-way valve element assembly and a locking valve element assembly. The valve body is provided with an oil inlet, an oil outlet, a first containing cavity and a second containing cavity, the locking valve element assembly is partially located in the second containing cavity, and the locking valve element assembly is configured to be located at the first end of the second containing cavity so as to block the first end of the second containing cavity when the oil pressure of the oil inlet is not higher than a threshold value; when the oil pressure of the oil inlet is higher than the threshold value, the first end of the first containing cavity is driven by oil to move towards the second end of the second containing cavity, so that the first end of the first containing cavity communicates with the oil inlet; the one-way valve element assembly is located in the first containing cavity, and when the first end of the first containing cavity is not communicated with the oil inlet, the one-way valve element assembly moves to the first end of the first containing cavity so as to cut off the oil inlet and the oil outlet. The service life of the one-way valve can be prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic valves, and in particular relates to a one-way valve. Background Art

[0002] As a one-way flow valve, the check valve is widely used in the control systems of different devices.

[0003] In the related art, a one-way valve includes a valve body and a valve core assembly. The valve body has an oil inlet and an oil outlet on opposite sides, respectively. The valve core assembly is movably located in the valve body. When the oil inlet pressure is greater than the oil outlet pressure, the oil pushes the valve core assembly to move, so that the oil inlet is connected to the oil outlet, and the one-way valve opens. When the oil pressure at the oil outlet is greater than the oil pressure at the oil inlet, the oil pushes the valve core assembly to block the oil inlet, so that the oil inlet is disconnected from the oil outlet, and the one-way valve closes.

[0004] However, when the one-way valve is opened, as long as the oil pressure at the oil inlet of the one-way valve is greater than the oil pressure at the oil outlet, the oil can push the valve core assembly to move and open the one-way valve. Therefore, when the one-way valve is opened, the oil pressure and flow rate of the oil at the oil inlet suddenly increase from zero. Correspondingly, the oil pressure and flow rate of the oil at the oil outlet also suddenly increase, causing the one-way valve to be subjected to a strong hydraulic shock, affecting the service life of the one-way valve. Summary of the invention

[0005] The embodiment of the present disclosure provides a one-way valve, which can increase the service life of the one-way valve. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a one-way valve, which includes 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 chamber and a second accommodating chamber, the first end of the first accommodating chamber is connected to the first end of the second accommodating chamber, the second end of the first accommodating chamber is connected to the oil outlet, and the oil inlet is connected to the second accommodating chamber; the locking valve core assembly is partially located in the second accommodating chamber and is connected to the valve body, and the locking valve core assembly is configured to: when the oil pressure at the oil inlet is not higher than a threshold value, the locking valve core assembly is located at the first end of the second accommodating chamber to block the second accommodating chamber one end, and when the oil pressure at the oil inlet is higher than the threshold value, it moves toward the second end of the second accommodating chamber under the drive of the oil, so that the first end of the first accommodating chamber is connected with the oil inlet; the one-way valve core assembly is located in the first accommodating chamber, and the one-way valve core assembly is configured as: when the first end of the first accommodating chamber is connected with the oil inlet, it moves toward the second end of the first accommodating chamber under the drive of the oil, so that the oil inlet is connected with the oil outlet, and when the first end of the first accommodating chamber is not connected with the oil inlet, it moves to the first end of the first accommodating chamber to cut off the oil inlet and the oil outlet.

[0007] In another implementation of the present 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 chamber and is used to seal the first end of the second accommodating chamber, and the other end of the locking valve core is located outside the valve body, the locking valve core can move relative to the valve body, and the moving direction of the locking valve core is the arrangement direction of the first accommodating chamber and the second accommodating chamber; the locking reset member is located in the second accommodating chamber and is sleeved on the outer wall of the locking valve core close to the second end, and the two ends of the locking reset member are respectively abutted against the locking valve core and the valve body, so that when the oil pressure at the oil inlet is not higher than the threshold value, the locking valve core is reset to the first end of the second accommodating chamber.

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

[0009] In another implementation of the present disclosure, the limit member includes a sliding member and a lifting and resetting member, the sliding member is movably located in the third accommodating chamber and the second accommodating chamber, 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 outside the sliding member, and the lifting and resetting member is clamped between the sliding member and the valve body at both ends along the moving direction of the sliding member, and the lifting and resetting member is used to limit the sliding member in the third accommodating chamber when the oil pressure in the third accommodating chamber is not higher than the threshold value.

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

[0011] In another implementation of the present disclosure, there are multiple third accommodating chambers, and the multiple third accommodating chambers are divided into two parts along a direction perpendicular to the movement direction of the locking valve core, and the two parts are respectively located on opposite sides of the second accommodating chamber; there is a limit member in each of the third accommodating chambers.

[0012] In another implementation of the present disclosure, the valve core body includes a valve core head and a valve core rod; the valve core head is sleeved on the outside of one end of the valve core rod, the valve core head is used to seal the first end of the second accommodating cavity, and 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 the mating piece.

[0013] In another implementation of the present disclosure, one 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 chamber, the cone is located on the side of the oil inlet close to the first accommodating chamber.

[0014] In another implementation of the present disclosure, the valve core body also includes an isolation plate, which is located between the oil inlet and the mating part along the moving direction of the valve core body, and the isolation plate sealing sleeve is outside the middle part of the valve core rod. The isolation plate is in sliding contact with the valve core rod, and the isolation plate is connected to the valve body.

[0015] In yet another implementation of the present 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 in a direction toward the second accommodating cavity.

[0016] The technical solution provided by the embodiments of the present disclosure brings the following beneficial effects:

[0017] When the one-way valve needs to be opened, the locking valve core assembly can be pre-controlled (for example, manually operated) to move toward the second end of the second accommodating chamber, so that the locking valve core assembly leaves the first end of the second accommodating chamber, the first end of the first accommodating chamber is connected to the oil inlet, and the oil in the oil inlet will enter the first accommodating chamber. After the oil enters the first accommodating chamber, since the locking valve core assembly is configured to: when the oil pressure of the oil inlet is higher than the threshold, it moves toward the second end of the second accommodating chamber under the drive of the oil, so that the first end of the first accommodating chamber is connected to the oil inlet, so a part of the oil drives the locking valve core assembly to move so that the first end of the first accommodating chamber is connected to the oil inlet. The one-way valve core assembly is configured to move toward the second end of the first accommodating chamber under the drive of the oil when the first end of the first accommodating chamber is connected to the oil inlet, so that the oil inlet is connected to the oil outlet, so after the first end of the first accommodating chamber is connected to the oil inlet, the oil drives the one-way valve core assembly to move so that the oil inlet is connected to the oil outlet. In this way, the above-mentioned one-way valve can push the locking valve core assembly to move and push the one-way valve core assembly through the locking valve core assembly when the oil pressure at the oil inlet is higher than the threshold value, so that part of the oil pressure can be borne by the locking valve core assembly, so as to reduce the pressure shock acting on the one-way valve core assembly and extend the service life of the one-way valve.

[0018] When there is no oil pressure at the oil inlet, the locking valve core assembly can be reset to the first end of the second accommodating chamber to block the first end of the second accommodating chamber, so that the second accommodating chamber is not connected to the oil inlet, and the oil inlet is not connected to the first accommodating chamber. When the oil inlet is not connected to the first accommodating chamber, the one-way valve core assembly is reset to the first end of the first accommodating chamber, and the one-way valve core assembly can block the port at the first end of the first accommodating chamber, so that the oil inlet is not connected to the oil outlet. It can be seen that when the oil pressure at the oil inlet is not higher than the threshold, the one-way valve is closed.

[0019] The one-way valve provided in the embodiment of the present disclosure can not only share the oil pressure of the oil liquid by locking the valve core component when the oil pressure of the oil inlet is higher than the threshold value to reduce the oil pressure shock, but also lock the one-way valve when the oil pressure of the oil inlet is not higher than the threshold value, so that the one-way valve is closed, thereby extending the service life of the one-way valve and improving the safety and reliability of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0022] Figure 2 is a schematic diagram of the structure of the matching parts;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure corresponding to the extreme position of the center-locked valve core in the valve body;

[0024] Figure 4 is a schematic diagram of the structure of the sliding member;

[0025] Figure 5 It is a structural schematic diagram of the valve core head;

[0026] Figure 6 It is a structural schematic diagram of the valve core rod;

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

[0028] Figure 8 It is a structural schematic diagram of the valve body;

[0029] Fig. 9 It is a structural schematic diagram of the valve seat;

[0030] Fig.10 for Fig. 9 A cross-sectional view of

[0031] Fig.11 It is a structural schematic diagram of a one-way valve core.

[0032] The symbols in the figure mean the following:

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

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

[0035] 4. Locking valve core assembly; 41. Locking valve core; 411. Valve core body; 4111. Valve core head; 4110. Conical body; 41110. Inner hole; 41111. Sealing ring platform; 4112. Valve core rod; 41121. Shaft shoulder; 41122. Threaded section; 41123. Connecting section; 4113. Isolation plate; 41131. Boss; 41132. Baffle; 41130 , isolation perforation; 4115, locking cover; 4116, hand wheel; 4117, locking nut; 412, matching piece; 4120, threaded hole; 4121, spring groove; 43, locking reset piece; 44, limit piece; 441, sliding piece; 4411, top plate; 4412, guide column; 4413, bump; 4410, guide ramp; 442, lifting reset piece; 443, screw plug. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0037] The present disclosure provides a one-way valve. Figure 1 As shown, the one-way valve comprises 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 chamber 103 and a second accommodating chamber 104, the first accommodating chamber 103 and the second accommodating chamber 104 are arranged in sequence, and the oil inlet 101 and the oil outlet 102 are spaced apart from each other.

[0038] The first end of the first accommodating chamber 103 is communicated with the first end of the second accommodating chamber 104 , the second end of the first accommodating chamber 103 is communicated with the oil outlet 102 , and the oil inlet 101 is communicated with the second accommodating chamber 104 .

[0039] The locking valve core assembly 4 is partially located in the second accommodating chamber 104 and is connected to the valve body 1. The locking valve core assembly 4 is configured as follows: when the oil pressure at the oil inlet 101 is not higher than the threshold value, it is located at the first end of the second accommodating chamber 104 to block the first end of the second accommodating chamber 104, and when the oil pressure at the oil inlet 101 is higher than the threshold value, it moves toward the second end of the second accommodating chamber 104 driven by the oil, so that the first end of the first accommodating chamber 103 is connected to the oil inlet 101.

[0040] The one-way valve core assembly 2 is located in the first accommodating chamber 103, and the one-way valve core assembly 2 is configured as follows: when the first end of the first accommodating chamber 103 is connected to the oil inlet 101, the one-way valve core assembly 2 moves toward the second end of the first accommodating chamber 103 driven by the oil to connect the oil inlet 101 with the oil outlet 102, and when the first accommodating chamber 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 chamber 103 to cut off the oil inlet 101 and the oil outlet 102.

[0041] When the one-way valve provided in the embodiment of the present disclosure is used, 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 foundation for the one-way valve core assembly 2 and the locking valve core assembly 4.

[0042] Moreover, the one-way valve core assembly 2 is movably located in the first accommodating chamber 103 along the arrangement direction of the first accommodating chamber 103 and the second accommodating chamber 104, and when the first end of the first accommodating chamber 103 is connected with the oil inlet 101, the one-way valve core assembly 2 moves toward the second end of the first accommodating chamber 103, so that the oil inlet 101 is connected with the oil outlet 102. When the first accommodating chamber 103 is not connected with the oil inlet 101, the one-way valve core assembly 2 moves to the first end of the first accommodating chamber 103 to cut off the oil inlet 101 and the oil outlet 102. In this way, whether the oil inlet 101 and the oil outlet 102 are connected can be controlled by controlling the one-way valve core assembly 2.

[0043] When the one-way valve needs to be opened, the locking valve core assembly 4 can be controlled in advance (for example, manually operated) to move toward the second end of the second accommodating chamber 104, so that the locking valve core assembly 4 leaves the first end of the second accommodating chamber 104, the first end of the first accommodating chamber 103 is connected with the oil inlet 101, and the oil in the oil inlet 101 enters the first accommodating chamber 103. After the oil enters the first accommodating chamber 103, since the locking valve core assembly 4 is configured to move toward the second end of the second accommodating chamber 104 under the drive of the oil when the oil pressure of the oil inlet 101 is higher than the threshold value, so that the first end of the first accommodating chamber 103 is connected with the oil inlet 101, a part of the oil drives the locking valve core assembly 4 to move so that the first end of the first accommodating chamber 103 is connected with the oil inlet 101. The one-way valve core assembly 2 is configured to move toward the second end of the first accommodating chamber 103 under the drive of oil when the first end of the first accommodating chamber 103 is connected with the oil inlet 101, so that the oil inlet 101 is connected with the oil outlet 102. Therefore, after the first end of the first accommodating chamber 103 is connected with the oil inlet 101, the oil drives the one-way valve core assembly 2 to move so that the oil inlet 101 is connected with the oil outlet 102. In this way, the above one-way valve can push the locking valve core assembly 4 to move and push the one-way valve core assembly 2 when the oil pressure at the oil inlet is higher than the threshold through the locking valve core assembly 4, so that 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 be reset to the first end of the second accommodating chamber 104 to block the first end of the second accommodating chamber 104, so that the second accommodating chamber 104 is not connected to the oil inlet 101, and the oil inlet 101 is not connected to the first accommodating chamber 103. When the oil inlet 101 is not connected to the first accommodating chamber 103, the one-way valve core assembly 2 is reset to the first end of the first accommodating chamber 103, and the one-way valve core assembly 2 can block the port at the first end of the first accommodating chamber 103, and the oil inlet 101 is not connected to the oil outlet 102. It can be seen that when the oil pressure at the oil inlet 101 is not higher than the threshold value, the one-way valve is closed.

[0045] The one-way valve provided in the embodiment of the present disclosure can not only share the oil pressure of the oil liquid by locking the valve core assembly 4 when the oil pressure of the oil inlet 101 is higher than the threshold value to reduce the oil pressure shock, but also lock the one-way valve when the oil pressure of the oil inlet 101 is not higher than the threshold value, so that the one-way valve is closed, thereby extending the service life of the one-way valve and improving the safety and reliability of the one-way valve.

[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 chamber 104 and is used to block the first end of the second accommodating chamber 104, and the other end of the locking valve core 41 is located outside the valve body 1, and the locking valve core 41 can move relative to the valve body 1, and the moving direction of the locking valve core 41 is the arrangement direction of the first accommodating chamber 103 and the second accommodating chamber 104.

[0047] The locking reset member 43 is located in the second accommodating chamber 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 are respectively abutted against the locking valve core 41 and the valve body 1, 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 chamber 104.

[0048] In the above implementation, the locking valve core 41 is used to block or unblock the first end of the second accommodating chamber 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 chamber 104 after the locking valve core 41 moves under the action of an external force, so that the one-way valve is closed again.

[0049] In this embodiment, the locking and resetting member 43 is a telescopic spring.

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

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

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

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

[0054] In the above implementation, the third accommodating chamber 105 is used to provide a mounting base for the stopper 44, and is also used to introduce the oil of the oil inlet 101 into the third accommodating chamber 105, so that when the oil pressure of the oil inlet 101 is higher than the threshold, the stopper 44 can move in the second accommodating chamber 104 so as to abut against the side of the matching member 412 facing the first accommodating chamber 103, so that the valve core body 411 can move relative to the matching member 412. At the same time, when the oil pressure of the oil inlet 101 is not higher than the threshold, the stopper 44 is completely located in the third accommodating chamber 105, and will not limit the matching member 412, so that the matching member 412 can move synchronously with the valve core body 411.

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

[0056] Figure 2 The schematic diagram of the structure of the matching parts is shown in Figure 2. Figure 2 Optionally, the fitting 412 is a rectangular plate, and a threaded hole 4120 is provided in the middle of the fitting 412. The threaded hole 4120 is threadedly connected to the outer wall of the valve core body 411, and the outer wall of the fitting 412 is in sliding contact with the cavity wall of the second accommodating cavity 104. The fitting 412 is set as a rectangular plate, so that the fitting 412 will not rotate, but can only move linearly in the second accommodating cavity 104, so that when the valve core body 411 rotates, it will not drive the fitting 412 to rotate, but the fitting 412 can only move under the action of the thread.

[0057] In this embodiment, the locking reset member 43 is a telescopic spring. The side of the fitting 412 facing the locking reset member 43 has an annular spring groove 4121, 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] Continue to see Figure 1 Optionally, the limit 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 chamber 105 and the second accommodating chamber 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 and resetting member 442 is sleeved on the outside of the sliding member 441, and the two ends of the lifting and resetting 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 and resetting member 442 is used to limit the sliding member 441 in the third accommodating chamber 105 when the oil pressure in the third accommodating chamber 105 is not higher than the threshold value.

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

[0061] In this embodiment, the stopper 44 further includes a screw plug 443, which is located in the third accommodating chamber 105 and is threadedly connected to the valve body 1. The screw plug 443 is used to block the end of the third accommodating chamber 105 away from the second accommodating chamber 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 accommodating chambers 105, and the multiple third accommodating chambers 105 are divided into two parts along the moving direction perpendicular to the locking valve core 41, and the two parts of the third accommodating chambers 105 are respectively located on opposite sides of the second accommodating chamber 104. There are multiple communicating oil passages 107, and the multiple communicating oil passages 107 are connected to the multiple third accommodating chambers 105 in a one-to-one correspondence. There are multiple limiting members 44, and the multiple limiting members 44 correspond to the multiple third accommodating chambers 105 in a one-to-one correspondence, and there is a limiting member 44 in each third accommodating chamber 105.

[0063] In the above implementation, the plurality of limiting members 44 can further increase the limiting capability of the limiting member 44 on the matching member 412 .

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

[0065] Figure 3 for Figure 1 The structural diagram of the middle locking valve core in the limit position of the valve body, combined with Figure 3 When the oil pressure at the oil inlet 101 is not higher than the threshold, the fitting member 412 is located on the side of the sliding member 441 facing the first accommodating chamber 103 .

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

[0067] In the above implementation, the fitting 412 is threadedly connected to the valve core body 411, so that when the valve core body 411 is rotated, the fitting 412 and the valve core body 411 will move relative to each other, so that the fitting 412 is limited by the sliding member 441. After the valve core body 411 rotates, the valve core body 411 will move linearly relative to the fitting 412, thereby realizing the movement of the valve core body 411 toward the second end of the second accommodating chamber 104.

[0068] The valve core body 411 blocks the first end of the second accommodating chamber 104, and the matching piece 412 is located on the side of the sliding piece 441 facing the first accommodating chamber 103. In this way, after the one-way valve is closed, when the locking valve core 41 blocks the first end of the second accommodating chamber 104, the matching piece 412 can be limited by the sliding piece 441, and the locking valve core 41 always blocks the first end of the second accommodating chamber 104, so that when the locking valve core 41 is linearly moved by the push-pull force, the locking valve core 41 cannot be displaced, thereby improving the locking effect of the one-way valve. Only under the action of torque, after the locking valve core 41 rotates, can the locking valve core 41 be unlocked. The guiding inclined surface 4410 can make the matching piece 412 move from one side of the sliding piece 441 toward the first accommodating chamber 103 to the other side more smoothly.

[0069] Figure 4 is a schematic diagram of the structure of the sliding part, combined with Figure 4 Optionally, the sliding member 441 includes a circular top plate 4411, a guide column 4412 and a protrusion 4413, the guide column 4412 and the protrusion 4413 are respectively located on two opposite plate surfaces of the top plate 4411, and the guide column 4412 and the protrusion 4413 are respectively 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 chamber 105. The lifting and resetting member 442 is sleeved on the outside of the guide column 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 chamber 105. The protrusion 4413 is used to contact the screw plug 443. The guide slope 4410 is located at one end of the guide column 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 chamber 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 chamber 105. The protrusion 4413 is used to contact the screw plug 443, so that the top plate 4411 and the screw plug 443 are spaced apart, and then the oil can enter the space between the top plate 4411 and the screw plug 443, so that the oil can act on the top plate 4411 to push the top plate 4411 to move. The guide column 4412 is used to provide an installation base for the lifting and restoring member 442, and at the same time, the lifting and restoring member 442 will not bend, but can only be extended and retracted along the moving direction of the sliding member 441.

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

[0072] See 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 outside 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 chamber 104, and 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 matching piece 412.

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

[0074] Figure 5 The schematic diagram of the valve core head is shown in Figure 2. Figure 5 In this embodiment, the end of the valve core head 4111 facing the valve core rod 4112 is a cone 4110, and the end of the cone 4110 with a smaller end surface area is connected to the valve core rod 4112, and when the valve core head 4111 blocks the first end of the second accommodating chamber 104, the cone 4110 is located on the side of the oil inlet 101 close to the first accommodating chamber 103.

[0075] In the above implementation, since the end of the valve core head 4111 facing the valve core rod 4112 is the cone 4110, and when the valve core head 4111 blocks the first end of the second accommodating chamber 104, the cone 4110 is located on the side of the oil inlet 101 close to the first accommodating chamber 103. In this way, when oil enters the oil inlet 101, the oil will flow along the outer wall of the cone 4110 to the first end of the second accommodating chamber 104. When the oil flows along the outer wall of the cone 4110 to the first end of the second accommodating chamber 104, since the small end of the cone 4110 faces the valve core rod 4112, the flow area of ​​the oil will be reduced when it flows, thereby achieving throttling and pressure reduction, and further reducing pressure shock.

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

[0077] Figure 6 The schematic diagram of the valve stem structure is shown in Figure 2. 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 part of the valve core rod 4112 has a threaded section 41122, and the threaded section 41122 is used for threaded connection with the threaded hole 4120 of the matching piece 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 further includes a locking cover 4115, which is sleeved outside the valve core rod 4112, and one side of the locking cover 4115 abuts against the shaft 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 further includes a hand wheel 4116 and a locking nut 4117. The hand wheel 4116 is sleeved outside the connecting section 41123 and is clamped at the first end of the connecting section 41123. The locking nut 4117 is threadedly connected to the second end of the connecting section 41123 and is locked and fitted with the hand wheel 4116. In this way, the hand wheel 4116 can be set at the end of the valve core rod 4112 to operate the valve core rod 4112 through the hand wheel 4116.

[0080] Optionally, the locking valve core 41 also includes an isolation plate 4113, which is located between the oil inlet 101 and the fitting 412 along the moving direction of the valve core body 411, and the isolation plate 4113 is sealed outside the middle part of the valve core rod 4112, and the isolation plate 4113 is in sliding contact with the valve core rod 4112, and 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 chamber 104 from the oil inlet 101, so that the oil can only be located on the side of the isolation plate 4113 facing the first accommodating chamber 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 and the like.

[0082] Figure 7 The schematic diagram of the isolation plate is shown in Figure 2. Figure 7 In this embodiment, the isolation 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 fit 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 perform an interference fit with the circular inner wall of the second accommodating chamber 104, and the baffle 41132 is used to fit with the square cavity wall of the second accommodating chamber 104, so that the baffle 41132 can be stopped and limited by the circular inner wall of the second accommodating chamber 104, so that the isolation plate 4113 is firmly located in the second accommodating chamber 104 without moving.

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

[0085] See 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 the two ends of the one-way reset member 22 are respectively against the inner wall of the valve body 1, and the extension direction of the one-way reset member 22 is the moving 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 chamber 103. The one-way reset member 22 is used to reset the one-way valve core 21.

[0087] Figure 8 The schematic diagram of the valve body is shown in Figure 2. 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 in the direction toward the second accommodating cavity 104 .

[0088] In the above implementation, the setting of the above tapered port can also reduce the flow area of ​​the oil, so that the oil can be further throttled and depressurized when flowing to the oil outlet 102, thereby further reducing the pressure shock.

[0089] Combination Figure 3 Optionally, the valve body 1 includes a valve seat 11, a valve block 12 and an end cover 13. The valve seat 11 and the end cover 13 are respectively 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 the end cover 13 are detachably connected to the valve block 12 , so as to facilitate the installation of the one-way valve core assembly 2 and the locking valve core assembly 4 in the valve body 1 .

[0091] Fig. 9 It is the structural diagram of the valve seat. Fig.10 for Fig. 9 The cross-sectional view of Fig. 9 and Fig.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 waist-shaped holes 110 on the side away from the one-way valve core 21. The two waist-shaped holes 110 are used to connect the first accommodating chamber 103 with the oil outlet 102.

[0092] Fig.11 It is a schematic diagram of the structure of the one-way valve core. Fig.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 , and the sealing slope 211 is used to cooperate with the tapered opening of the first accommodating chamber 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 direction 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 to flow oil to lubricate the one-way valve core 21 .

[0094] The following briefly introduces the working process of the one-way valve provided in the embodiment of the present disclosure:

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

[0096] When the one-way valve is working, oil enters the oil inlet 101, and the oil enters the third accommodating chamber 105. Under the action of the oil, the sliding member 441 overcomes the elastic force of the lifting and restoring member 442 and moves toward the second accommodating chamber 104, and the sliding member 441 partially extends into the second accommodating chamber 104. The locking valve core 41 is manually controlled to rotate the valve core rod 4112 clockwise, so that the valve core head 4111 continues to support the first end of the second accommodating chamber 104. The valve core rod 4112 continues to rotate clockwise. Since the valve core head 4111 cannot move to the left, and the matching member 412 is threadedly connected to the valve core rod 4112, the matching member 412 overcomes the elastic force of the locking and restoring member 43 and moves to the right, and supports the guide inclined surface 4410 of the sliding member 441, so that the sliding member 441 moves away from the second accommodating chamber 104. The valve core rod 4112 continues to rotate clockwise until the fitting 412 moves rightward through the sliding member 441 , and the sliding member 441 extends into the second accommodating chamber 104 again.

[0097] Combination Figure 1 , and then the rotation direction of the valve core rod 4112 is changed, the fitting 412 is stuck by the sliding member 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 accommodation chamber 104 is no longer closed. The oil in the oil inlet 101 enters the first accommodation chamber 103 and pushes the one-way valve core 21 to overcome the elastic force of the one-way reset member 22 and move to the left, the one-way valve opens, and the oil enters the first accommodation chamber 103 and is discharged from the oil outlet 102.

[0098] When the pressure oil in the oil inlet 101 is cut off, there is no pressure oil support in the third accommodation chamber 105, and the lifting reset member 442 pushes the sliding member 441 to move away from the second accommodation chamber 104, and the locking fails. The locking reset member 43 pushes the matching member 412 to move left, and the matching member 412 moves left quickly with the valve core rod 4112 and the valve core head 4111, and the valve core head 4111 closes the first end of the second accommodation chamber 104 and cuts off the connection between the oil inlet 101 and the first accommodation chamber 103.

[0099] When the one-way valve is in reverse oil flow, the one-way valve core 21 cannot be opened, and at the same time there is a double guarantee of the locking valve core 41, so the one-way valve is blocked in reverse.

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

Claims

1. A one-way valve, characterized in that: The one-way valve comprises a valve body (1), a one-way valve core assembly (2) and a locking valve core assembly (4); The valve body (1) comprises an oil inlet (101), an oil outlet (102), a first accommodating chamber (103) and a second accommodating chamber (104); the first end of the first accommodating chamber (103) is connected to the first end of the second accommodating chamber (104); the second end of the first accommodating chamber (103) is connected to the oil outlet (102); and the oil inlet (101) is connected to the second accommodating chamber (104); The locking valve core assembly (4) is partially located in the second accommodating chamber (104) and is connected to the valve body (1). The locking valve core assembly (4) is configured to: when the oil pressure of the oil inlet (101) is not higher than a threshold value, be located at the first end of the second accommodating chamber (104) to block the first end of the second accommodating chamber (104); and when the oil pressure of the oil inlet (101) is higher than the threshold value, move toward the second end of the second accommodating chamber (104) driven by oil, so that the first end of the first accommodating chamber (103) is connected to the oil inlet (101); The one-way valve core assembly (2) is located in the first accommodating chamber (103), and the one-way valve core assembly (2) is configured to: when the first end of the first accommodating chamber (103) is connected to the oil inlet (101), move toward the second end of the first accommodating chamber (103) driven by oil to connect the oil inlet (101) with the oil outlet (102); and when the first end of the first accommodating chamber (103) is not connected to the oil inlet (101), move to the first end of the first accommodating chamber (103) to cut off the oil inlet (101) and the oil outlet (102).

2. The one-way valve according to claim 1, characterized in that: The locking valve core assembly (4) comprises 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 chamber (104) and is used to block the first end of the second accommodating chamber (104); the other end of the locking valve core (41) is located outside the valve body (1); the locking valve core (41) is movable relative to the valve body (1); and the moving direction of the locking valve core (41) is the arrangement direction of the first accommodating chamber (103) and the second accommodating chamber (104); The locking reset member (43) is located in the second accommodating chamber (104) and is sleeved on the outer wall of the locking valve core (41) close to the second end. The two ends of the locking reset member (43) are respectively in contact with the locking valve core (41) and the valve body (1), so that when the oil pressure at the oil inlet (101) is not higher than the threshold value, the locking valve core (41) is reset to the first end of the second accommodating chamber (104).

3. The one-way valve according to claim 2, characterized in that: The locking valve core (41) comprises a valve core body (411) and a matching piece (412); The matching piece (412) is located in the second accommodating cavity (104) and is sleeved outside the valve core body (411), and the matching piece (412) is threadedly connected to the valve core body (411); The valve body (1) further comprises a third accommodating chamber (105), the third accommodating chamber (105) being located on one side of the second accommodating chamber (104) and on a side of the oil inlet (101) away from the first accommodating chamber (103), the first end of the third accommodating chamber (105) being connected to the middle of the second accommodating chamber (104), and the second end of the third accommodating chamber (105) being connected to the oil inlet (101); The locking valve core assembly (4) further comprises a limiting member (44), the limiting member (44) being telescopically located in the third accommodating chamber (105) and the second accommodating chamber (104), and being located on one side of the valve core body (411), and the telescopic direction of the limiting member (44) being 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 value, the limit member (44) is located in the third accommodating chamber (105), and when the oil pressure at the oil inlet (101) is higher than the threshold value, at least a portion of the limit member (44) is located in the second accommodating chamber (104) and abuts against a side of the matching member (412) facing the first accommodating chamber (103).

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

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

6. The one-way valve according to claim 3, characterized in that: There are a plurality of the third accommodating chambers (105), and the plurality of the third accommodating chambers (105) are divided into two parts along a direction perpendicular to the movement direction of the locking valve core (41), and the two parts are respectively located on two opposite sides of the second accommodating chamber (104); There is one limiting member (44) in each of the third accommodating chambers (105).

7. The one-way valve according to claim 3, characterized in that: The valve core body (411) comprises 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 chamber (104), and the other end of the valve core rod (4112) is located outside the valve body (1); The middle portion of the valve core rod (4112) is threadedly connected to the matching piece (412).

8. The one-way valve according to claim 7, characterized in that: The end of the valve core head (4111) facing the valve core rod (4112) is a cone (4110), and the end of the cone (4110) with a smaller end surface area is connected to the valve core rod (4112), and when the valve core head (4111) blocks the first end of the second accommodating chamber (104), the cone (4110) is located on the side of the oil inlet (101) close to the first accommodating chamber (103).

9. The one-way valve according to claim 8, characterized in that: The valve core body (411) also includes an isolation plate (4113), which is located between the oil inlet (101) and the fitting (412) along the moving direction of the valve core body (411), and 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), and the isolation plate (4113) is connected to the valve body (1).

10. The one-way valve according to any one of claims 1 to 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 in a direction toward the second accommodating cavity (104).

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