One-way overflow valve
The design of an integrated one-way relief valve solves the problem of complex assembly caused by the separate use of the relief valve and the one-way valve in the prior art, and realizes a one-way relief valve with a simple structure and good sealing performance.
Patent Information
- Application Number
- CN202422834031.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The existing overflow valve and one-way valve need to be used separately, which makes assembly complicated and inconvenient for assembly and disassembly.
An integrated one-way relief valve is designed, in which a valve cavity, a one-way valve port and a relief valve port are arranged in the valve body. The combination of the first and second valve cores and the return spring is used to realize one-way flow of the medium in different directions.
The one-way valve and the relief valve are integrated, which simplifies the structure, facilitates disassembly and assembly, and improves sealing performance and service life.
Smart Images
Figure CN223434806U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of overflow valves, and in particular to a one-way overflow valve. Background Art
[0002] Current relief valves can only achieve a relief function, while check valves can only achieve a one-way flow function. When both a relief valve and a check valve are needed, they need to be assembled together, making the assembled valve body bulky, difficult to disassemble, and inconvenient to use. Utility Model Content
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a one-way relief valve.
[0004] According to the first aspect of the present disclosure, the one-way relief valve comprises:
[0005] A valve body, wherein a valve cavity and a one-way valve port and a relief valve port are arranged opposite to each other, and a valve seat is arranged in the valve cavity;
[0006] a first valve core, the first valve core being movably disposed in the valve cavity;
[0007] a second valve core, the second valve core movably passing through the central hole of the first valve core;
[0008] a first return spring, the first return spring being pre-compressed between the second valve core and the first valve core and configured to cause the second valve core to block an orifice on a side of the central hole of the first valve core opposite to the first return spring;
[0009] The second return spring is pre-compressed between the valve body and the second valve core, so that the second valve core, the first return spring and the first valve core as a whole are in contact with the valve seat to prevent the one-way valve port and the overflow valve port from being connected through the valve cavity.
[0010] In one embodiment of the present disclosure, the first valve core has a spherical shape, and under the elastic force of the second return spring, the spherical surface of the first valve core is in contact with the valve seat.
[0011] In one embodiment of the present disclosure, the valve seat is an annular flange protruding from the valve cavity.
[0012] In one embodiment of the present disclosure, the second valve core includes:
[0013] a valve stem, the valve stem passing through the central hole of the first valve core;
[0014] a valve core body, the valve core body being disposed on an end portion of the valve stem opposite to the first return spring and being configured to block an orifice of the central hole of the first valve core on a side opposite to the first return spring under the elastic force of the first return spring;
[0015] A spring seat is provided at the other end of the valve stem and is configured to pre-compress the first return spring onto the first valve core.
[0016] In one embodiment of the present disclosure, the valve core body has an outer conical surface, and the orifice of the central hole has an inner conical surface that matches the outer conical surface.
[0017] In one embodiment of the present disclosure, the one-way relief valve further includes a cartridge seat, which is detachably provided on the valve body and is configured to pre-compress the second return spring onto the second valve core.
[0018] In one embodiment of the present disclosure, the insertion seat includes a guide blind hole and at least one medium channel opened on a peripheral wall where the guide blind hole is located, and the medium channel is configured to connect the overflow valve port and the guide blind hole;
[0019] The second valve core is partially inserted into the guide blind hole, and the second return spring is pre-compressed between the bottom of the guide blind hole and the second valve core.
[0020] In one embodiment of the present disclosure, the insertion seat has a plurality of the medium channels, and the plurality of the medium channels are sequentially spaced around the guide blind hole.
[0021] In one embodiment of the present disclosure, the cartridge seat and the valve body are connected by threads, the valve cavity of the valve body has a radial limiting surface, and the radial limiting surface is constructed to limit the axial displacement of the cartridge seat relative to the valve body.
[0022] In one embodiment of the present disclosure, an internal thread is provided on the inner wall of the valve cavity of the valve body near at least one of the one-way valve port and the overflow valve port, and the internal thread is configured to be connected to a connector on a hose.
[0023] In one embodiment of the present disclosure, the valve body is connected to an ED connector near at least one of the one-way valve port and the overflow valve port.
[0024] One beneficial effect of the one-way relief valve disclosed herein is that, when a medium is introduced into the relief valve port, the medium pushes the second valve core to overcome the preload force of the first return spring and move axially, thereby opening the center hole of the first valve core. The medium passes through the gap between the center hole of the first valve core and the second valve core and then flows out of the one-way valve port, thereby achieving a relief effect from the relief valve port to the one-way valve port. When a medium is introduced into the one-way valve port, the medium pushes the second valve core to overcome the preload force of the second return spring, thereby pushing the second valve core, the first return spring, and the first valve core as a whole to move axially, the first valve core moves away from the valve seat, and the medium flows out of the relief valve port through the gap between the first valve core and the valve seat, thereby achieving a one-way oil flow effect from the one-way valve port to the relief valve port. Integrating the one-way valve and the relief valve into the same valve body not only allows the one-way valve and the relief valve to achieve their respective functions, but also simplifies the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0026] Figure 1 is a partial cross-sectional schematic diagram of a one-way relief valve provided in one embodiment of the present disclosure;
[0027] Figure 2 yes Figure 1 An enlarged schematic diagram of the second valve core portion;
[0028] Figure 3 is a partial cross-sectional schematic diagram of a plug-in socket provided in one embodiment of the present disclosure;
[0029] Figure 4 is an exploded view of a one-way relief valve provided in one embodiment of the present disclosure;
[0030] Figure 5 1 is a schematic diagram of a one-way relief valve provided in one embodiment of the present disclosure.
[0031] Figure 1-Figure 5 The one-to-one correspondence between the component names and the reference numerals is as follows:
[0032] 1- one-way valve port; 2- overflow valve port; 3- valve seat; 4- first valve core;
[0033] Second valve core; 51-valve stem; 52-valve core body; 53-spring seat;
[0034] 6-first return spring; 7-second return spring;
[0035] 8-insertion seat; 81-guide blind hole; 82-medium channel;
[0036] 9 - ED connector; 10 - valve body; 101 - radial limit surface; 11 - gasket. DETAILED DESCRIPTION
[0037] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the examples, the numerical expressions, and the numerical values are not limiting to the scope of the present disclosure unless otherwise specifically stated.
[0038] The following description of at least one example embodiment is merely illustrative in nature and is in no way limiting to the scope of the present disclosure and its applications or uses.
[0039] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, the techniques, methods, and devices should be considered part of the description, where appropriate.
[0040] In all examples shown and discussed herein, any specific value should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the example embodiments can have different values.
[0041] It should be noted that like reference numerals and letters refer to like items throughout the drawings, and as a result, further discussion of such items is unnecessary in subsequent drawings.
[0042] In this document, "upper", "lower", "front", "back", "left", "right", and the like are used to describe relative positions between the relevant parts, and are not intended to limit the absolute positions of the relevant parts.
[0043] In this document, "first", "second", and the like are used to distinguish between items from each other, and are not intended to indicate importance and order, and a prerequisite for each other.
[0044] In this document, "equal", "same", and the like are not strictly limited in the mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and allowed in manufacturing or use, etc.
[0045] In this document, a one-way overflow valve is viewed directly facing the observer, the left side of the observer is left, the right side of the observer is right, the axis direction of the first spool is axial and points to the left and right sides, the direction perpendicular to the axis direction of the first spool is radial, and the circumferential direction around the first spool is circumferential.
[0046] Euro: European standard: indicates that the connector complies with the standards established by the European Standardization Organization (CEN), ensuring universality and interchangeability within Europe.
[0047] DIN: Deutsches Institut fur Normung: DIN is a German standardization organization responsible for developing and publishing various technical standards.
[0048] The existing pipe type overflow valve has a complex structure, a large volume, and is inconvenient to connect with a hose. Therefore, the present disclosure provides a one-way overflow valve. In order to facilitate understanding, the specific structure of the one-way overflow valve of the present disclosure and its working principle will be described in detail below with reference to Figure 1-Figure 5 , in combination with embodiments.
[0049] The one-way overflow valve includes a valve body 10, a first valve core 4, a second valve core, a first return spring 6, and a second return spring 7. The valve body 10 is provided with a valve cavity, and opposite one-way valve ports 1 and overflow valve ports 2. The valve cavity is provided with a valve seat 3. The first valve core 4 is movably arranged in the valve cavity. The second valve core penetrates the center hole of the first valve core 4 in a movable manner. The first return spring 6 is pre-pressed between the second valve core and the first valve core 4, and is configured to block the orifice on the opposite side of the center hole of the first valve core 4 from the first return spring 6. The second return spring 7 is pre-pressed between the valve body 10 and the second valve core, so that the second valve core, the first return spring 6, and the first valve core 4 are in contact with the valve seat 3 as a whole, to block the conduction of the one-way valve ports 1 and the overflow valve ports 2 through the valve cavity.
[0050] Specifically, referring to Figure 1 , the second valve core penetrates the center hole of the first valve core 4 and can move axially relative to the first valve core 4 under the action of an external force. The part of the second valve core penetrating the first valve core 4 has a maximum radial width less than the diameter of the center hole of the first valve core 4, i.e., there is a radial gap between the part of the second valve core penetrating the first valve core 4 and the center hole of the first valve core 4. The right end of the second valve core has a maximum radial width greater than the diameter of the center hole of the first valve core 4, and can block the center hole of the first valve core 4. The left end of the second valve core is fixedly provided with the first return spring 6, and the first return spring 6 is a compression spring. The left side of the first return spring 6 is pre-pressed against the second valve core, and the right side is pre-pressed against the first valve core 4. Under the action of the elastic force of the first return spring 6, the right end of the second valve core abuts against the center hole of the first valve core 4, blocking the center hole of the first valve core 4.
[0051] The first valve core 4 can move axially relative to the valve cavity under the action of an external force. A valve seat 3 is provided within the valve cavity. The left side of the second return spring 7 is pre-compressed against the valve body 10, and the right side is pre-compressed against the second valve core. The second return spring 7 is a tower spring that can quickly return to its original shape after being compressed, providing a stable elastic force. It also has a long fatigue life and can maintain stable performance during multiple compression and recovery processes. Under the elastic force of the second return spring 7, the second valve core, the first return spring 6, and the first valve core 4 are compressed to the right as a whole, causing the first valve core 4 to abut against the valve seat 3, preventing the one-way valve port 1 and the relief valve port 2 from passing through the valve cavity.
[0052] Relief valve port 2 is located on the left side of valve body 10. After the medium enters the valve cavity through relief valve port 2, the first valve core 4 abuts against the valve seat 3, and the second valve core, under the elastic force of the first return spring 6, blocks the center hole of the first valve core 4, preventing the medium from being discharged from the one-way valve port 1. When the medium pressure exceeds the preload force of the first return spring 6, the second valve core, under the action of the medium pressure, overcomes the elastic force of the first return spring 6 and moves axially to the right relative to the first valve core 4, opening the center hole of the first valve core 4. The medium flows out through the gap between the center hole of the first valve core 4 and the second valve core, and is then discharged from the one-way valve port 1. By setting the preload force of the first return spring 6, the pressure at relief valve port 2 can be maintained at a safe value, achieving a relief effect from relief valve port 2 to the one-way valve port 1.
[0053] The one-way valve port 1 is located on the right side of the valve body 10. After the medium enters the valve cavity through the one-way valve port 1, the first valve core 4 abuts against the valve seat 3 under the elastic force of the second return spring 7, preventing the medium from being discharged from the relief valve port 2. When the medium pressure exceeds the preload force of the second return spring 7, the first valve core 4, the first return spring 6, and the second valve core as a whole overcome the elastic force of the second return spring 7 under the action of the medium pressure and move axially to the left relative to the valve cavity. The first valve core 4 moves away from the valve seat 3, forming a gap between the first valve core 4 and the valve seat 3. The medium flows out through the gap between the first valve core 4 and the valve seat 3 and is then discharged from the relief valve port 2. This achieves the effect of one-way oil flow from the one-way valve port 1 to the relief valve port 2.
[0054] Working principle:
[0055] Reference Figure 5The P end is the relief valve port end, and the R end is the one-way valve port end. When the relief valve is used, the medium pressure at the P end is too large. When the medium pressure is greater than the preload force of the first return spring 6, the second valve core overcomes the elastic force of the first return spring 6 under the action of the medium pressure and moves axially to the right relative to the first valve core 4. The center hole of the first valve core 4 opens, and the medium flows out from the R end through the gap between the center hole of the first valve core 4 and the second valve core, so that the pressure at the P end remains stable; when a one-way valve is used, the medium is introduced into the R end. When the medium pressure is greater than the preload force of the second return spring 7, the first valve core 4, the first return spring 6 and the second valve core as a whole overcome the elastic force of the second return spring 7 under the action of the medium pressure and move axially to the left relative to the valve cavity. The first valve core 4 moves away from the valve seat 3, forming a gap between it and the valve seat 3, and the medium flows out from the P end through the gap between the first valve core 4 and the valve seat 3.
[0056] With the one-way relief valve disclosed herein, when medium is introduced from the relief valve port 2, the medium pushes the second valve core to overcome the preload force of the first return spring 6 and move axially, opening the center hole of the first valve core 4. The medium passes through the center hole of the first valve core 4 and then flows out of the one-way valve port 1, achieving a relief effect from the relief valve port 2 to the one-way valve port 1. When medium is introduced from the one-way valve port 1, the medium pushes the second valve core to overcome the preload force of the second return spring 7, thereby pushing the second valve core, the first return spring 6 and the first valve core 4 as a whole to move axially, the first valve core 4 moves away from the valve seat 3, and the medium flows out of the relief valve port 2 through the gap between the first valve core 4 and the valve seat 3, achieving a one-way oil passage effect from the one-way valve port 1 to the relief valve port 2. Integrating the one-way valve and the relief valve into the same valve body not only allows the one-way valve and the relief valve to achieve their respective functions, but also simplifies the structure.
[0057] In one embodiment, the first valve core 4 has a spherical shape. Under the elastic force of the second return spring 7 , the spherical surface of the first valve core 4 contacts the valve seat 3 .
[0058] Specifically, refer to Figure 1 A spherical table is the portion of a sphere sandwiched between two parallel planes. The spherical table design of the first valve core 4 allows the rounded sides of the first valve core 4 to better contact the valve seat 3, forming an effective seal. When the medium flows from the one-way valve port 1 to the relief valve port 2, the spherical table-shaped first valve core 4 provides a nearly leak-free seal. Furthermore, when the medium pushes the first valve core 4 to overcome the pressure of the second return spring 7, the friction between the medium and the first valve core 4 is relatively small, resulting in a smooth movement.
[0059] In addition, circular grooves are arranged on the side of the first valve core 4 at intervals along the circumferential direction. The arrangement of the circular grooves realizes pilot control of the incoming medium, reduces the impact force of the medium, avoids excessive medium pressure when the valve core is just opened, and improves the service life of the equipment.
[0060] In one embodiment, the valve seat 3 is an annular flange protruding from the valve cavity.
[0061] Specifically, the valve seat 3 is usually made of wear-resistant and corrosion-resistant materials, such as stainless steel, cemented carbide, etc., to ensure reliability and durability in long-term use. The valve seat 3 is arranged on the inner wall of the valve body 10 and is arranged as a protruding annular edge. The valve seat 3 and the valve body 10 are integrally formed, which can reduce the risk of leakage due to improper assembly or loosening after long-term use, and improve the sealing performance of the valve. It can better withstand the stress in harsh working environments such as high pressure and high temperature, and increase the overall stability and service life of the valve. The number of parts and assembly steps are reduced, which helps to reduce production costs and reduce quality problems caused by assembly. In addition, the contact area with the valve core can be increased, forming a good sealing contact surface with the spherical table-shaped first valve core 4, improving the sealing effect and reducing the risk of fluid leakage.
[0062] In one embodiment, the second valve core includes a valve stem 51, a valve core body 52 and a spring seat 53, wherein the valve stem 51 passes through the center hole of the first valve core 4; the valve core body 52 is arranged on the end of the valve stem 51 opposite to the first return spring 6, and is constructed to block the orifice on the center hole of the first valve core 4 opposite to the first return spring 6 under the elastic force of the first return spring 6; the spring seat 53 is arranged at the other end of the valve stem 51, and is constructed to pre-tighten the first return spring 6 on the first valve core 4.
[0063] Specifically, refer to Figure 1 、 Figure 2 The radial width of the portion of the valve stem 51 that extends through the first valve core 4 is smaller than the center hole of the first valve core 4. A gap exists between the valve stem 51 and the first valve core 4, allowing medium to flow from the relief valve port 2 to the check valve port 1 through the gap between the valve stem 51 and the first valve core 4 during overflow. The valve core body 52 is located at the right end of the valve stem 51 and is capable of blocking the center hole of the first valve core 4. A spring seat 53 is threadedly connected to the left end of the valve stem 51. The spring seat 53 has an end surface that extends radially relative to the valve stem 51. The left end of the first return spring 6 is preloaded against the end surface of the spring seat 53, while the right end of the first return spring 6 is preloaded against the left end surface of the first valve core 4. Under the elastic force of the first return spring 6, the first valve core 4 and the second valve core are subjected to opposing forces, causing the valve core body 52 to fit tightly against the opening of the center hole, effectively sealing the first valve core 4 from the second valve core.
[0064] In one embodiment, the valve core body 52 has an outer conical surface, and the opening of the central hole has an inner conical surface matching the outer conical surface.
[0065] Specifically, the outer conical surface of the valve core body 52 cooperates with the inner conical surface of the orifice of the central hole. The conical surface contact has a larger contact area, which can provide more uniform pressure distribution, avoid local pressure from causing excessive wear or damage, and provide higher sealing performance to reduce the possibility of fluid leakage.
[0066] In one embodiment, the one-way overflow valve further comprises a plug seat 8, which is detachably arranged on the valve body 10 and is configured to pre-press the second return spring 7 against the second valve core.
[0067] Specifically, referring to Figure 1 , Figure 4 , the plug seat 8 is threadedly connected to the inner wall of the valve body 10, and the second return spring 7 is pre-pressed against the left side of the plug seat 8 and the left end face of the spring seat 53. Under the elastic force of the second return spring 7, the second valve core is pushed to the right and is pre-pressed, and then the second valve core, the first return spring 6, and the first valve core 4 are pre-pressed to the right as a whole. The first valve core 4 is tightly attached to the valve seat 3, thereby preventing the one-way valve port 1 and the overflow valve port 2 from being communicated through the valve cavity.
[0068] In one embodiment, the plug seat 8 comprises a guide blind hole 81 and at least one medium passage 82 opened on the peripheral wall of the guide blind hole 81, and the medium passage 82 is configured to communicate the overflow valve port 2 and the guide blind hole 81. The second valve core is partially inserted into the guide blind hole 81, and the second return spring 7 is pre-pressed between the bottom of the guide blind hole 81 and the second valve core.
[0069] Specifically, referring to Figure 3 , Figure 4 , the plug seat 8 has a cylindrical shape as a whole and can be arranged in the valve cavity. The plug seat 8 is provided with the guide blind hole 81, and the orifice of the guide blind hole 81 faces the right side. The spring seat 53 of the second valve core, part of the valve stem 51, and part of the first return spring 6 are inserted into the guide blind hole 81. The second return spring 7 is pre-pressed between the bottom of the guide blind hole 81 and the second valve core. When the second valve core is subjected to the elastic force of the first return spring 6 and the second return spring 7 or the pressure of the medium, the second valve core moves linearly along the axial direction under the guidance of the guide blind hole 81, thereby preventing deflection or jamming. The cooperation between the guide blind hole 81 and the moving parts can reduce unnecessary friction and prolong the service life of the parts. At least one medium passage 82 is opened on the peripheral wall of the guide blind hole 81, and the medium passes through the medium passage 82 from the overflow valve port 2 to the spring seat 53.
[0070] In one embodiment, the plug seat 8 has a plurality of medium passages 82, which are sequentially and spaced apart around the guide blind hole 81.
[0071] Specifically, the insertion seat 8 is provided with multiple media channels 82 to increase the throughput of the medium. When the medium passes through the media channels 82, it exerts an impact force on the guide blind hole 81. The multiple media channels 82 are arranged in a sequentially spaced manner around the guide blind hole 81, ensuring that the impact force of the medium on the guide blind hole 81 is uniform in all directions, reducing unnecessary friction and extending the service life of the component.
[0072] In one embodiment, the cartridge seat 8 and the valve body 10 are connected by threads, and the valve cavity of the valve body 10 has a radial limiting surface 101 , which is configured to limit the axial displacement of the cartridge seat 8 relative to the valve body 10 .
[0073] Specifically, the circumferential end surface of the cartridge seat 8 is provided with external threads, and the inner wall of the valve body 10 is provided with internal threads that cooperate with the cartridge seat 8. The threaded connection achieves relative fixation between the cartridge seat 8 and the valve body 10. The valve cavity is also provided with a radial limiting surface 101. The cartridge seat 8 comprises two cylindrical sections in the axial direction, with the end with the larger diameter cooperating with the radial limiting surface 101, thereby fixing the cartridge seat 8 axially relative to the valve body 10 and further improving the stability of the cartridge seat 8.
[0074] In one embodiment, an internal thread is provided on the inner wall of the valve cavity of the valve body 10 near at least one of the one-way valve port 1 and the overflow valve port 2 , and the internal thread is configured to be connected to a connector on a hose.
[0075] Specifically, internal threads are provided on the inner wall of the valve cavity near the one-way valve port 1 and the relief valve port 2, and the hose connector generally has external threads that match the internal threads of the valve body 10. The hose connector is screwed into the internal threads of the valve body 10 until the connector is fully tightened to ensure the tightness and sealing of the connection. This design simplifies installation, making the connection between the hose and the valve body 10 simpler and faster, reducing installation time and complexity. Typically, the connection can be completed by hand or with simple tools, without the need for complex installation equipment. Threaded connections are easy to disassemble and replace, facilitate maintenance and overhaul, and are compatible with other connectors that meet the same standards, increasing flexibility of use.
[0076] In one embodiment, the valve body 10 is connected to an ED connector 9 near at least one of the one-way valve port 1 and the relief valve port 2 .
[0077] Specifically, refer to Figure 1 、 Figure 4 The ED (Euro-DIN) connector 9 features a standardized design, making it easy for users to select and replace. It is typically made of high-strength metal materials, such as stainless steel or carbon steel, and can withstand high operating pressures. A gasket 11 seals the valve body 10 and the ED (Euro-DIN) connector 9. The ED (Euro-DIN) connector 9 facilitates quick connection of the one-way relief valve between hoses.
[0078] In addition, in order to facilitate better understanding, the use process of the one-way overflow valve of the present disclosure will be described in detail below in combination with the actual application scene of the actual one-way overflow valve.
[0079] 1. Manually thread the one-way overflow valve through the ED (Euro-DIN) joint 9 between the hoses, when the overflow valve is needed, make the overflow valve port 2 as the oil inlet port, when the one-way valve is needed, make the one-way valve port 1 as the oil inlet port;
[0080] 2. When the overflow valve is needed, the overflow valve port 2 is connected to the medium;
[0081] 3. When the medium pressure is greater than the pre-tightening force of the first return spring 6, the second valve core moves right relative to the first valve core 4 along the axial direction under the action of the medium pressure, overcoming the elastic force of the first return spring 6, the center hole of the first valve core 4 is opened, the medium flows out through the center hole of the first valve core 4 and the gap of the second valve core, and then is guided out from the one-way valve port 1;
[0082] 4. When the one-way valve is needed, the one-way valve port 1 is connected to the medium;
[0083] 5. When the medium pressure is greater than the pre-tightening force of the second return spring 7, the first valve core 4, the first return spring 6 and the second valve core as a whole move left relative to the valve cavity along the axial direction under the action of the medium pressure, overcoming the elastic force of the second return spring 7, the first valve core 4 moves away from the valve seat 3, and a gap is formed between the first valve core 4 and the valve seat 3, the medium flows out through the gap between the first valve core 4 and the valve seat 3, and then is guided out from the overflow valve port 2.
[0084] The above has described the embodiments of the present disclosure, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical applications or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.
Claims
1. A one-way relief valve, characterized in that: The one-way relief valve comprises: A valve body (10), wherein a valve cavity and a one-way valve port (1) and a relief valve port (2) arranged opposite to each other are provided in the valve body (10), and a valve seat (3) is provided in the valve cavity; a first valve core (4), the first valve core (4) being movably arranged in the valve cavity; a second valve core, the second valve core movably passing through the central hole of the first valve core (4); a first return spring (6), the first return spring (6) being pre-compressed between the second valve core and the first valve core (4), and being configured to cause the second valve core to block an orifice on the central hole of the first valve core (4) on the side opposite to the first return spring (6); A second return spring (7) is pre-compressed between the valve body (10) and the second valve core, and is configured to make the second valve core, the first return spring (6) and the first valve core (4) as a whole contact and cooperate with the valve seat (3) to prevent the one-way valve port (1) and the overflow valve port (2) from being connected through the valve cavity.
2. The one-way relief valve according to claim 1, characterized in that: The first valve core (4) has a spherical shape, and under the elastic force of the second return spring (7), the spherical surface of the first valve core (4) is in contact with the valve seat (3).
3. The one-way relief valve according to claim 2, characterized in that: The valve seat (3) is an annular flange protruding from the valve cavity.
4. The one-way relief valve according to claim 1, characterized in that: The second valve core includes: a valve stem (51), the valve stem (51) passing through the center hole of the first valve core (4); a valve core body (52), the valve core body (52) being arranged at an end portion of the valve stem (51) on a side opposite to the first return spring (6), and being configured to block an orifice on a side opposite to the first return spring (6) on a central hole of the first valve core (4) under the elastic force of the first return spring (6); A spring seat (53) is provided at the other end of the valve stem (51) and is configured to pre-compress the first return spring (6) onto the first valve core (4).
5. The one-way relief valve according to claim 4, characterized in that: The valve core body (52) has an outer conical surface, and the opening of the central hole has an inner conical surface that matches the outer conical surface.
6. The one-way relief valve according to claim 1, characterized in that: The one-way overflow valve further comprises a cartridge seat (8), which is detachably arranged on the valve body (10) and is configured to pre-compress the second return spring (7) onto the second valve core.
7. The one-way relief valve according to claim 6, characterized in that: The insert seat (8) includes a guide blind hole (81) and at least one medium channel (82) provided on a peripheral wall of the guide blind hole (81), wherein the medium channel (82) is configured to connect the overflow valve port (2) with the guide blind hole (81); The second valve core is partially inserted into the guide blind hole (81), and the second return spring (7) is pre-tightened between the bottom of the guide blind hole (81) and the second valve core.
8. The one-way relief valve according to claim 7, characterized in that: The insertion seat (8) has a plurality of medium channels (82), and the plurality of medium channels (82) are arranged in sequence and at intervals around the guide blind hole (81).
9. The one-way relief valve according to claim 7, characterized in that: The insert seat (8) and the valve body (10) are connected via threads, and the valve cavity of the valve body (10) has a radial limiting surface (101), and the radial limiting surface (101) is constructed to limit the axial displacement of the insert seat (8) relative to the valve body (10).
10. The one-way relief valve according to claim 7, characterized in that: An internal thread is provided on the inner wall of the valve cavity of the valve body (10) close to at least one of the one-way valve port (1) and the overflow valve port (2), and the internal thread is configured to be connected to a connector on a hose.
11. The one-way relief valve according to claim 1, characterized in that: The valve body (10) is connected to an ED connector (9) near at least one of the one-way valve port (1) and the overflow valve port (2).