Hydraulic control check valve
By designing a hydraulically controlled one-flow valve and utilizing the movement of the hydraulically controlled valve core, one-way flow and reverse flow control of high pressure and large displacement is achieved, solving the problem of poor sealing effect of the existing hydraulically controlled one-flow valve and being suitable for high pressure environments.
Patent Information
- Application Number
- CN202422924087.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing hydraulically controlled check valves have poor sealing effects and can only operate at low pressure and small displacement, and are unable to achieve unidirectional and reverse flow control of liquids.
A hydraulically controlled check valve is designed, comprising a valve body, a piston, a piston rod, a piston elastic member, a valve core, a valve core elastic member and a valve seat. The valve core is hydraulically controlled to move, thereby enabling free flow of liquid in one direction, and is opened or closed in the other direction by an external pilot hydraulic signal, thereby adjusting the output displacement.
It realizes one-way flow control of high pressure and large displacement, and can realize reverse flow of liquid when needed. It has simple structure, good sealing effect and is suitable for high pressure environment.
Smart Images
Figure CN223434554U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, in particular to a liquid control check valve. BACKGROUND
[0002] The liquid control check valve is a kind of hydraulic control element, usually used in hydraulic system to realize the one-way flow control of hydraulic fluid. Its basic function is to allow liquid to flow freely in one direction, and in the other direction, it needs to be controlled by external pilot hydraulic signal to open or close, which is beneficial to the logical sequence control of some hydraulic principles, but the current market is mainly plate structure, generally low pressure, small displacement, and poor sealing effect. SUMMARY
[0003] The utility model discloses a kind of liquid control check valves, output displacement is adjusted by the size of input hydraulic pressure, the one-way flow of liquid control check valve can be realized, and when needing reflux, opening or liquid control cut-off can be realized.
[0004] To achieve the above object, the utility model provides a kind of liquid control check valve, including valve body, piston, piston rod, piston elastic element, valve core, valve core elastic element and valve seat, the first liquid port, second liquid port and pilot control liquid port are equipped on the valve body, the pilot valve cavity, liquid cavity and valve cavity are equipped in the valve body, the first liquid port is opened in the lateral wall of the valve body, the first liquid port is communicated with the liquid cavity, the valve seat is arranged in the valve cavity, and the outer lateral wall between the valve seat and the inner lateral wall of the valve cavity forms liquid passage, the liquid passage is communicated with the second liquid port, the valve core cavity is equipped in the valve seat, the valve core is movably arranged in the valve core cavity, the valve core elastic element is clamped between the valve core and the valve core cavity, the lateral wall of the valve seat is opened with liquid passage, the pilot control liquid port is communicated with the pilot valve cavity, the piston is movably arranged in the pilot valve cavity, the piston elastic element is clamped between the piston and the pilot valve cavity, the piston rod is connected with the piston, and the piston rod passes through the liquid cavity;
[0005] When the first liquid port enters liquid, liquid enters the liquid cavity and makes the valve core move and compress the valve core elastic element, so that the liquid passage and the liquid passage are communicated;
[0006] When the pilot control liquid port inputs pilot liquid, the piston moves and compresses the piston elastic element, the piston rod is against the first end of the valve core and pushes the valve core to move and compress the valve core elastic element, so that the liquid passage and the liquid passage are communicated;
[0007] When the liquid inlet pressure of the first liquid port and the pilot control liquid port is less than the elastic force of the spool elastic member, the spool is reset by the reset force of the spool elastic member, the first end of the spool abuts against the valve cavity and blocks the liquid passing end face in the liquid cavity communicated with the valve cavity, and the side wall of the spool blocks the liquid passing port.
[0008] As a preferred scheme of the present application, the piston elastic member is a piston spring, and the piston elastic member is sleeved on the piston rod.
[0009] As a preferred scheme of the present application, the spool elastic member is a spool spring, the second end of the spool is provided with a mounting groove, one end of the spool elastic member is arranged in the mounting groove, and the original length of the spool elastic member is greater than the groove depth of the mounting groove.
[0010] As a preferred scheme of the present application, the axis of the pilot control liquid port, the axis of the piston, the axis of the piston rod and the axis of the spool are coaxial.
[0011] As a preferred scheme of the present application, the liquid passing port is provided with a plurality of liquid passing ports and is arranged at intervals along the circumference of the valve seat.
[0012] Compared with the prior art, the liquid control check valve has the beneficial effects that:
[0013] When the first liquid port is used as a working liquid inlet, liquid enters the liquid cavity, the liquid pressure makes the spool move to compress the spool elastic member, the spool no longer blocks the liquid passing end face in the liquid cavity and the liquid passing port, so that the liquid cavity, the valve cavity, the liquid passing port and the liquid passing channel are communicated, and the liquid is discharged from the second liquid port; when the working liquid needs to enter from the second liquid port and be discharged from the first liquid port (reverse flow, backflow), the pilot liquid is input at the pilot control liquid port to provide hydraulic pressure, the spool is opened, the working liquid flows reversely, the size of the spool opening can be controlled by adjusting the size of the input pilot liquid, and the liquid control check valve has the functions of one-way flow and opening or liquid control cutoff when backflow is needed. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.
[0015] Figure 1 The structure diagram of the liquid control check valve is provided.
[0016] In the figure, valve body 1; first liquid port 11; second liquid port 12; pilot control liquid port 13; pilot valve chamber 14; liquid chamber 15; valve chamber 16; liquid passage 161; piston 2; piston rod 3; piston elastic member 4; valve core 5; mounting groove 51; valve core elastic member 6; valve seat 7; liquid passage 71. DETAILED DESCRIPTION
[0017] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0018] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0019] like Figure 1 As shown, a hydraulically controlled one-flow valve according to a preferred embodiment of the present invention comprises a valve body 1, a piston 2, a piston rod 3, a piston elastic member 4, a valve core 5, a valve core elastic member 6 and a valve seat 7. The valve body 1 is provided with a first liquid port 11, a second liquid port 12 and a pilot control liquid port 13. A pilot valve cavity 14, a liquid cavity 15 and a valve cavity 16 are provided in the valve body 1. The first liquid port 11 is opened on the side wall of the valve body 1. The first liquid port 11 is communicated with the liquid cavity 15. The valve seat 7 is arranged in the valve cavity 16, and a liquid passage 161 is formed between the outer wall of the valve seat 7 and the inner wall of the valve cavity 16. The channel 161 is in communication with the second liquid port 12, so that a large flow rate can be achieved. A valve core 5 cavity is provided in the valve seat 7. The valve core 5 is movably disposed in the valve core 5 cavity. The valve core elastic member 6 is sandwiched between the valve core 5 and the valve core 5 cavity. A liquid passage 71 is provided on the side wall of the valve seat 7. The pilot control liquid port 13 is in communication with the pilot valve cavity 14. The piston 2 is movably disposed in the pilot valve cavity 14. The piston elastic member 4 is sandwiched between the piston 2 and the pilot valve cavity 14. The piston rod 3 is connected to the piston 2, and the piston rod 3 passes through the liquid cavity 15.
[0020] When liquid flows into the first liquid port 11 , the liquid enters the liquid cavity 15 and causes the valve core 5 to move and compress the valve core elastic member 6 , so that the liquid port 71 is connected to the liquid channel 161 ;
[0021] When the pilot control liquid port 13 inputs pilot liquid, the piston 2 moves and compresses the piston elastic element 4, the piston rod 3 abuts against the first end of the spool 5 and pushes the spool 5 to move and compress the spool elastic element 6, so that the liquid passage 71 is communicated with the liquid passage 161;
[0022] As shown in the first liquid port 11 and the pilot control liquid port 13, when the liquid pressure is less than the elastic force of the spool elastic element 6, the spool 5 is reset under the force of the spool elastic element 6, the first end of the spool 5 abuts against the valve cavity 16 and blocks the liquid end face in the liquid cavity 15 communicated with the valve cavity 16, and the side wall of the spool 5 blocks the liquid passage 71. Figure 1
[0023] Specifically, the piston elastic element 4 is a piston spring, and the piston elastic element 4 is sleeved on the piston rod 3, so that the piston elastic element 4 is convenient to install, and the structure is compact.
[0024] Specifically, the spool elastic element 6 is a spool spring, the second end of the spool 5 is provided with a mounting groove 51, one end of the spool elastic element 6 is arranged in the mounting groove 51, and the original length of the spool elastic element 6 is greater than the groove depth of the mounting groove 51, so that the spool elastic element 6 is positioned and installed conveniently, and when the spool 5 is completely opened, the compressed spool elastic element 6 can be completely located in the mounting groove 51.
[0025] Specifically, the axis of the pilot control liquid port 13, the axis of the piston 2, the axis of the piston rod 3 and the axis of the spool 5 are coaxial, so that the overall performance and reliability of the hydraulic control one-way valve are improved.
[0026] Specifically, the liquid passage 71 is provided with a plurality of liquid passages and is arranged along the circumference of the valve seat 7, so that the working liquid can flow smoothly in the valve cavity 16.
[0027] In the description of the utility model, it is to be explained that, unless another explicit stipulation and limitation, the term "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the intercommunication. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.
[0028] The above only is the preferred embodiment of the utility model, it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, still can make a number of improvements and replacements, these improvements and replacements also should view as the protection scope of the utility model.
Claims
1. A hydraulically controlled check valve, characterized in that: and a valve body, a piston, a piston rod, a piston elastic member, a valve core, a valve core elastic member and a valve seat, wherein the valve body is provided with a first liquid port, a second liquid port and a pilot control liquid port, the valve body is provided with a pilot valve cavity, a liquid cavity and a valve cavity, the first liquid port is opened on the side wall of the valve body, the first liquid port is communicated with the liquid cavity, the valve seat is arranged in the valve cavity, and a liquid passage is formed between the outer side wall of the valve seat and the inner side wall of the valve cavity, the liquid passage is communicated with the second liquid port, a valve core cavity is provided in the valve seat, the valve core is movably arranged in the valve core cavity, the valve core elastic member is sandwiched between the valve core and the valve core cavity, the side wall of the valve seat is provided with a liquid passage, the pilot control liquid port is communicated with the pilot valve cavity, the piston is movably arranged in the pilot valve cavity, the piston elastic member is sandwiched between the piston and the pilot valve cavity, the piston rod is connected to the piston, and the piston rod passes through the liquid cavity; When liquid flows into the first liquid port, the liquid enters the liquid cavity and causes the valve core to move and compress the valve core elastic member, so that the liquid port is connected to the liquid channel; When the pilot fluid is input into the pilot control fluid port, the piston moves and compresses the piston elastic member, and the piston rod abuts against the first end of the valve core and pushes the valve core to move and compress the valve core elastic member, so that the fluid port is connected to the fluid channel; When the liquid inlet pressure of the first liquid port and the pilot control liquid port is less than the elastic force of the valve core elastic member, the valve core is under the reset force of the valve core elastic member, and the first end of the valve core is pressed against the valve cavity and blocks the liquid end surface in the liquid cavity that is connected to the valve cavity, and the side wall of the valve core blocks the liquid port.
2. The hydraulically controlled check valve according to claim 1, wherein: The piston elastic member is a piston spring, and the piston elastic member is sleeved on the piston rod.
3. The hydraulically controlled check valve according to claim 1, wherein: The valve core elastic member is a valve core spring. A mounting groove is provided on the second end of the valve core. One end of the valve core elastic member is arranged in the mounting groove. The original length of the valve core elastic member is greater than the groove depth of the mounting groove.
4. The hydraulically controlled one-flow valve according to claim 1, wherein: The axis of the pilot control liquid port, the axis of the piston, the axis of the piston rod and the axis of the valve core are coaxial.
5. The hydraulically controlled one-flow valve according to claim 1, wherein: The liquid transfer ports are provided in plurality and are spaced apart along the circumference of the valve seat.