Bidirectional overflow valve
By setting a split adjustment rod and spring seat in the bidirectional relief valve and setting a projection on the contact surface, the problem of unstable torsion during the adjustment process is solved, and the stability and linearity of the pressure regulation process are improved.
Patent Information
- Application Number
- CN202422565879.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-23
AI Technical Summary
In the existing bidirectional relief valve, the pressure regulating spring is subjected to pressure along the axis of the valve seat and torque in the circumferential direction during the adjustment process, resulting in unstable preload value.
A bidirectional overflow valve is designed. By providing a split adjustment rod and the first spring seat, the adjustment rod and the spring seat can rotate relative to each other. The adjustment rod does not directly drive the spring seat to rotate, and a projection is provided on the contact surface to reduce friction. During adjustment, the pressure-regulating spring is only subject to axial pressure.
The radial torsion of the pressure regulating spring is effectively reduced, the stability and straightness of the pressure regulating process are improved, and the stability of the pressure regulating process is ensured.
Smart Images
Figure CN223136529U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a two-way overflow valve. Background Art
[0002] In the slewing devices of existing mechanical equipment, hydraulic circuits with buffering functions are widely used, such as the slewing devices of excavators, cranes, aerial work platforms, manipulators, and agricultural and forestry machinery. Among them, the two-way overflow valve is a key hydraulic component of such systems, and the performance of the two-way overflow valve directly affects the performance of the main machine.
[0003] A two-way overflow valve generally includes a valve seat, a valve core, an adjusting rod, and a pressure regulating spring. The valve seat has a valve cavity, a first valve port, and a second valve port. The valve core is slidably arranged in the valve cavity and can selectively open and close the passage between the first valve port and the second valve port. The adjusting rod is partially inserted into the valve seat and is threadedly connected to the valve seat. The pressure regulating spring is located in the valve cavity, and its two ends respectively abut against the valve core and the adjusting rod. When it is necessary to adjust the preset pressure of the pressure regulating spring, the adjusting rod can be rotated to move it along the axis of the valve seat, so that the pressure regulating spring stretches or is compressed in the valve cavity, so as to adjust the pre-tightening force of the pressure regulating spring. However, in the prior art, one end of the pressure regulating spring directly abuts against the end face of the adjusting rod. When the adjusting rod rotates to adjust the pre-tightening force of the pressure regulating spring, the pressure regulating spring will not only be subjected to the pressure along the axis of the valve seat, but also be subjected to the torsion force along the circumferential direction of the valve seat due to the friction force between it and the end face of the adjusting rod, resulting in an increase in the instability of the pre-tightening force value of the pressure regulating spring.
[0004] Therefore, it is urgent to propose a two-way overflow valve to solve the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a two-way overflow valve, which can effectively reduce the torsional force suffered by the pressure regulating spring when the adjusting rod rotates, thereby improving the straightness during the adjustment of the pressure regulating spring and ensuring the stability of the pressure regulating process.
[0006] As conceived above, the technical solution adopted by the utility model is as follows:
[0007] A two-way overflow valve, comprising:
[0008] A valve seat, which has a valve cavity, a first valve port, and a second valve port;
[0009] A valve core assembly, slidably arranged in the valve cavity and capable of selectively opening and closing the passage between the first valve port and the second valve port;
[0010] A first spring seat, slidably arranged in the valve cavity, and a first abutting surface is arranged at one end of the first spring seat away from the valve core assembly;
[0011] A pressure regulating spring is located in the valve cavity, and two ends of the pressure regulating spring respectively abut against the valve core assembly and the first spring seat.
[0012] An adjusting rod is partially disposed through the valve seat and is adjustably connected to the valve seat. A second abutting surface is disposed at one end of the adjusting rod facing the first spring seat. The first abutting surface and the second abutting surface abut against each other and can rotate relative to each other, and at least one of them is provided with a protruding portion.
[0013] As a preferred solution of the two-way overflow valve provided by the present utility model, the second abutting surface is a spherical surface to form the protruding portion, and the first abutting surface is a flat surface; or
[0014] The first abutting surface is a spherical surface to form the protruding portion, and the second abutting surface is a flat surface.
[0015] As a preferred solution of the two-way overflow valve provided by the present utility model, a receiving groove is disposed at one end of the first spring seat away from the valve core assembly, and the adjusting rod is partially received in the receiving groove.
[0016] As a preferred solution of the two-way overflow valve provided by the present utility model, the valve core assembly includes:
[0017] A valve core is slidably disposed in the valve cavity;
[0018] A second spring seat is located between the valve core and the pressure regulating spring, and one end of the pressure regulating spring away from the first spring seat abuts against the second spring seat.
[0019] As a preferred solution of the two-way overflow valve provided by the present utility model, a spherical groove is disposed on one side of the second spring seat facing the valve core, and an arc transition surface is disposed on one side of the valve core facing the second spring seat. The arc transition surface abuts against the spherical groove.
[0020] As a preferred solution of the two-way overflow valve provided by the present utility model, both the first spring seat and the second spring seat are in the shape of a stepped shaft. One end of the pressure regulating spring is disposed through the small-diameter section of the first spring seat and abuts against the stepped surface of the first spring seat. The other end of the pressure regulating spring is disposed through the small-diameter section of the second spring seat and abuts against the stepped surface of the second spring seat.
[0021] As a preferred solution of the two-way overflow valve provided by the present utility model, a limiting protrusion is disposed on the outer wall of the valve core, and a limiting member is disposed in the valve cavity. The limiting protrusion and the limiting member cooperate to limit the moving distance of the valve core in the direction of compressing the pressure regulating spring.
[0022] As a preferred embodiment of the two-way overflow valve provided by the present utility model, a limiting groove is provided on the inner wall of the valve cavity, and the limiting member is installed in the limiting groove in a limiting manner.
[0023] As a preferred embodiment of the two-way overflow valve provided by the present utility model, the limiting member is a retaining ring; or the limiting member is a protruding portion protruding from the inner wall of the valve cavity.
[0024] As a preferred embodiment of the two-way overflow valve provided by the present utility model, the valve core includes a valve core body and a valve core protrusion protruding from the valve core body. The valve core body is in sealing contact with the inner wall of the valve cavity, and there is a gap between the valve core protrusion and the inner wall of the valve cavity. The valve core protrusion can block the first valve port; and when the valve core protrusion blocks the first valve port, the second valve port is communicated with the gap.
[0025] The beneficial effects of the present utility model are as follows:
[0026] The present utility model provides a two-way overflow valve. By providing a split adjusting rod and a first spring seat, and the two can rotate relative to each other, the pressure regulating spring is not in direct contact with the adjusting rod. When adjusting the adjusting rod to adjust the pre-tightening force of the pressure regulating spring, the adjusting rod will not drive the first spring seat to rotate synchronously, so that the pressure regulating spring can receive the axial pressure from the first spring seat; in addition, at least one of the first abutting surface and the second abutting surface is provided with a protruding portion, so that the contact area between the two is small and the friction is small, and the radial torsion transmitted by the adjusting rod to the pressure regulating spring can be reduced, thereby effectively improving the straightness when the pressure regulating spring is adjusted and ensuring the stability of the pressure regulating process of the two-way overflow valve. Description of the Drawings
[0027] Figure 1 is a cross-sectional schematic view of the two-way overflow valve provided by the embodiment of the present utility model;
[0028] Figure 2 is Figure 1 the first partial structural schematic view of
[0029] Figure 3 is a structural schematic view of the adjusting rod provided by the embodiment of the present utility model;
[0030] Figure 4 is a cross-sectional schematic view of the adjusting rod provided by the embodiment of the present utility model;
[0031] Figure 5 is a structural schematic view of the first spring seat provided by the embodiment of the present utility model;
[0032] Figure 6 is a cross-sectional schematic view of the first spring seat provided by the embodiment of the present utility model;
[0033] Figure 7 is Figure 1 the structural schematic diagram of the second part;
[0034] Figure 8 is the structural schematic diagram of the valve core provided by the embodiment of the present utility model from a perspective;
[0035] Figure 9 is the structural schematic diagram of the second spring seat provided by the embodiment of the present utility model;
[0036] Figure 10 is the sectional view schematic diagram of the second spring seat provided by the embodiment of the present utility model;
[0037] Figure 11 is the structural schematic diagram of the valve core provided by the embodiment of the present utility model from a perspective;
[0038] Figure 12 is the sectional view schematic diagram of the valve core provided by the embodiment of the present utility model.
[0039] In the figure:
[0040] 100, valve seat; 1001, valve cavity; 1002, limiting member; 1003, limiting groove; 110, main valve seat; 111, first valve port; 112, second valve port; 120, valve sleeve; 130, screw sleeve;
[0041] 200, valve core assembly; 210, valve core; 211, arc transition surface; 212, second installation groove; 213, limiting projection; 220, second spring seat; 221, spherical groove; 2101, valve core body; 2102, valve core projection;
[0042] 300, first spring seat; 301, accommodating groove; 3011, first abutting surface; 302, first installation groove;
[0043] 400, pressure regulating spring;
[0044] 500, adjusting rod; 501, second abutting surface;
[0045] 601, first seal; 602, second seal. Detailed implementation manners
[0046] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.
[0047] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0048] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0049] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0050] Figure 1 A cross-sectional schematic view of the two-way overflow valve provided in this embodiment is shown. Figure 2 shows Figure 1 a schematic diagram of the first part structure of Figure 1 - Figure 2As shown in the figure, this embodiment provides a two-way overflow valve, which includes a valve seat 100, a valve core assembly 200, a first spring seat 300, a pressure regulating spring 400 and an adjusting rod 500. The valve seat 100 has a valve cavity 1001, a first valve port 111 and a second valve port 112; the valve core assembly 200 is slidably arranged in the valve cavity 1001 and can selectively open and close the passage between the first valve port 111 and the second valve port 112; the first spring seat 300 is slidably arranged in the valve cavity 1001, and a first abutting surface 3011 is arranged at one end of the first spring seat 300 away from the valve core assembly 200; the pressure regulating spring 400 is located in the valve cavity 1001, and both ends of the pressure regulating spring 400 respectively abut against the valve core assembly 200 and the first spring seat 300; the adjusting rod 500 is partially inserted through the valve seat 100 and is adjustably connected to the valve seat 100. A second abutting surface 501 is arranged at one end of the adjusting rod 500 facing the first spring seat 300. The first abutting surface 3011 and the second abutting surface 501 are abutted against each other and can rotate relative to each other, and at least one of them is provided with a protrusion.
[0051] For the two-way overflow valve provided in this embodiment, by providing a separate adjusting rod 500 and a first spring seat 300, and the two can rotate relative to each other, and the pressure regulating spring 400 is not in direct contact with the adjusting rod 500. When adjusting the pre-tightening force of the pressure regulating spring 400 by adjusting the adjusting rod 500, the adjusting rod 500 will not drive the first spring seat 300 to rotate synchronously, so that the pressure regulating spring 400 can receive the axial pressure from the first spring seat 300; in addition, at least one of the first abutting surface 3011 and the second abutting surface 501 is provided with a protrusion, so that the contact area between the two is small and the friction is small, and the radial torsion force transmitted by the adjusting rod 500 to the pressure regulating spring 400 can be reduced, thereby effectively improving the straightness of the pressure regulating spring 400 during adjustment and ensuring the stability of the pressure regulating process of the two-way overflow valve.
[0052] Optionally, in this embodiment, the adjusting rod 500 is threadedly connected to the valve seat 100. When the adjusting rod 500 is rotated, the adjusting rod 500 can move axially relative to the valve seat 100, so as to realize the adjustment of the pre-tightening force of the pressure regulating spring 400.
[0053] Figure 3 The structural schematic diagram of the adjusting rod 500 provided in this embodiment is shown. Figure 4 The sectional schematic diagram of the adjusting rod 500 provided in this embodiment is shown. As Figure 3 - Figure 4 And in combination with Figure 2As shown, the second abutting surface 501 is a spherical surface to form the above-mentioned convex portion, and the first abutting surface 3011 is a flat surface. That is to say, the surfaces where the adjusting rod 500 and the first spring seat 300 cooperate are the cooperation between a spherical surface and a flat surface, that is, point contact between the two, further reducing the contact area between the two, reducing the friction between the two, and greatly reducing the radial torsion force transmitted by the adjusting rod 500 to the pressure regulating spring 400, effectively improving the stability of the pressure regulating process of the two-way overflow valve. Of course, in other embodiments, the first abutting surface 3011 may also be set as a spherical surface, and the second abutting surface 501 may be set as a flat surface; or both the first abutting surface 3011 and the second abutting surface 501 may be set on a spherical surface, and the above effects can also be achieved.
[0054] Figure 5 Fig. shows a schematic structural view of the first spring seat 300 provided in this embodiment. Figure 6 Fig. shows a schematic cross-sectional view of the first spring seat 300 provided in this embodiment. As Figure 5 - Figure 6 and in combination with Figure 2 shown, a receiving groove 301 is provided at one end of the first spring seat 300 away from the valve core assembly 200, and a part of the adjusting rod 500 is received in the receiving groove 301. It can be understood that, since the cooperation between the first abutting surface 3011 and the second abutting surface 501 is between a spherical surface and a flat surface, when the adjusting rod 500 rotates, the contact point between the first abutting surface 3011 and the second abutting surface 501 is easily deviated from the axis of the first spring seat 300, resulting in uneven forces on both sides of the first spring seat 300 in the axial direction, and further causing the pressure regulating spring 400 to deflect. By providing the receiving groove 301 on the first spring seat 300, the receiving groove 301 can play a role in limiting the adjusting rod 500 to prevent the contact point between the first abutting surface 3011 and the second abutting surface 501 from deviating from the axis of the first spring seat 300 when the adjusting rod 500 rotates, thereby improving the stability of the pressure regulating process.
[0055] To ensure the sealing performance between the first spring seat 300 and the valve seat 100, a first sealing member 601 is further provided between the first spring seat 300 and the valve seat 100. Optionally, a first installation groove 302 for installing the first sealing member 601 is further provided on the first spring seat 300 to realize the stable installation of the first sealing member 601 and prevent it from falling off during use. In this embodiment, the first sealing member 601 is a rubber sealing ring, which has a good sealing effect and low cost.
[0056] Figure 7 Fig. shows Figure 1 the second partial structural view of Figure 7 and in combination with Figure 1As shown, the spool assembly 200 includes a spool 210 and a second spring seat 220. The spool 210 is slidably disposed in the valve cavity 1001. The second spring seat 220 is located between the spool 210 and the pressure regulating spring 400. One end of the pressure regulating spring 400 away from the first spring seat 300 abuts against the second spring seat 220. By providing the second spring seat 220, the installation stability of the pressure regulating spring 400 can be further increased.
[0057] In the prior art, an outward convex spherical surface is usually provided on the second spring seat, and a spherical concave surface is provided on the spool to cooperate with the outward convex spherical surface. Although this design has a certain self-centering ability, due to the small diameter of the spool, the processing requirements for machining the spherical concave surface on the spool are relatively high. In addition, the guiding effect of the outward convex spherical surface is poor, resulting in a large straightness error after the pressure regulating spring is adjusted, and a large radial deviation of the second spring seat.
[0058] Figure 8 The structural schematic diagram of the spool 210 provided in this embodiment is shown from a perspective. Figure 9 The structural schematic diagram of the second spring seat 220 provided in this embodiment is shown. Figure 10 The cross-sectional schematic diagram of the second spring seat 220 provided in this embodiment is shown. To solve the above problems, as Figure 8 - Figure 10 and in combination with Figure 7 shown, a spherical groove 221 is provided on one side of the second spring seat 220 facing the spool 210, and an arc transition surface 211 is provided on one side of the spool 210 facing the second spring seat 220. The arc transition surface 211 abuts against the spherical groove 221. It has been verified that this design has good centering ability. Since the spherical groove 221 is formed on the second spring seat 220 with relatively large dimensions, the processing difficulty and processing cost can be reduced. In addition, the arc transition surface 211 and the spherical groove 221 cooperate with each other to have good guiding properties, resulting in a small straightness error after the pressure regulating spring 400 is adjusted, and further reducing the radial deviation of the second spring seat 220.
[0059] As Figure 1 , Figure 2 and Figure 7 shown, both the first spring seat 300 and the second spring seat 220 are in the shape of a stepped shaft. One end of the pressure regulating spring 400 passes through the small-diameter section of the first spring seat 300 and abuts against the stepped surface of the first spring seat 300. The other end of the pressure regulating spring 400 passes through the small-diameter section of the second spring seat 220 and abuts against the stepped surface of the second spring seat 220. This setting method can play a role in limiting the pressure regulating spring 400, so that the pressure regulating spring 400 can only elongate or compress along its own axis direction, ensuring the stability of its adjustment process.
[0060] Optionally, the valve cavity 1001 includes an oil passage cavity and a spring cavity arranged along the axis direction of the valve seat 100. The valve core 210 is slidably disposed in the oil passage cavity, and the second spring seat 220 is slidably disposed in the spring cavity. To prevent oil from leaking from the gap between the valve core 210 and the oil passage cavity into the spring cavity after the passage between the first valve port 111 and the second valve port 112 is opened, which may affect the service life of the pressure regulating spring 400, in this embodiment, a second sealing member 602 is provided between the valve core 210 and the valve seat 100. Optionally, a second installation groove 212 for installing the second sealing member 602 is further provided on the valve core 210 to achieve stable installation of the second sealing member 602 and prevent it from falling off during use. In this embodiment, the second sealing member 602 is a Gleitring, which has good sealing effect, low friction and high pressure resistance.
[0061] Specifically, continuing as Figure 1 shown, the valve seat 100 includes a main valve seat 110, a valve sleeve 120 and a screw sleeve 130. The valve sleeve 120 is located between the main valve seat 110 and the screw sleeve 130, and the valve sleeve 120 is sleeved outside the main valve seat 110, and the screw sleeve 130 is sleeved outside the valve sleeve 120. The main valve seat 110, the valve sleeve 120 and the screw sleeve 130 are connected in sequence to form the valve cavity 1001. Among them, the valve core 210 is slidably disposed in the main valve seat 110, the first spring seat 300, the pressure regulating spring 400 and the second spring seat 220 are all disposed in the valve sleeve 120, and the adjusting rod 500 is screwed on the screw sleeve 130. Optionally, the main valve seat 110 is threadedly connected to the valve sleeve 120, and the valve sleeve 120 is threadedly connected to the screw sleeve 130, which is convenient for disassembly and assembly and machining.
[0062] Figure 11 shows a schematic structural view of the valve core 210 provided in this embodiment from one perspective. Figure 12 shows a cross-sectional view of the valve core 210 provided in this embodiment. As Figure 11 - Figure 12 and combined with Figure 7As shown, the valve core 210 includes a valve core body 2101 and a valve core protrusion 2102 protruding from the valve core body 2101. The diameter of the valve core protrusion 2102 is smaller than that of the valve core body 2101. The valve core body 2101 is in close contact with the inner wall of the valve cavity 1001, and there is a gap between the valve core protrusion 2102 and the inner wall of the valve cavity 1001. The valve core protrusion 2102 can block the first valve port 111. When the valve core protrusion 2102 blocks the first valve port 111, the second valve port 112 is communicated with the gap between the valve core protrusion 2102 and the inner wall of the valve cavity 1001, but the first valve port 111 and the second valve port 112 are not communicated. When the first valve port 111 is communicated with high-pressure oil, after the oil reaches the overflow value (i.e., the pre-tightening force of the pressure-regulating spring 400), the oil pushes the valve core protrusion 2102, so that the valve core body 2101 moves in the direction of compressing the pressure-regulating spring 400, thereby opening the passage between the first valve port 111 and the second valve port 112, and the oil can flow out from the second valve port 112 after passing through the first valve port 111. When the second valve port 112 is communicated with high-pressure oil, the oil enters through the second valve port 112 and can flow into the gap between the valve core protrusion 2102 and the inner wall of the valve cavity 1001, thereby acting on the valve core protrusion 2102. When the oil reaches the overflow value, the valve core 210 can be pushed to move in the direction of compressing the pressure-regulating spring 400, thereby opening the passage between the first valve port 111 and the second valve port 112, and the oil can flow out from the first valve port 111 after passing through the second valve port 112, the gap between the valve core protrusion 2102 and the inner wall of the valve cavity 1001 in sequence.
[0063] Continue as Figure 7 、 Figure 11 and Figure 12 As shown, a limit protrusion 213 is provided on the outer wall of the valve core 210, and a limit member 1002 is provided in the valve cavity 1001. The limit protrusion 213 and the limit member 1002 cooperate to limit the moving distance of the valve core 210 in the direction of compressing the pressure-regulating spring 400. By providing the cooperating limit protrusion 213 and limit member 1002, it can effectively prevent the displacement of the valve core 210 from exceeding the preset maximum stroke due to excessive oil flow, resulting in the valve core 210 coming out of the main valve seat 110, and further causing the failure of the function of the two-way overflow valve. Optionally, a limit groove 1003 is provided on the inner wall of the valve cavity 1001, and the limit member 1002 is limit-mounted in the limit groove 1003. By providing the limit groove 1003 on the inner wall of the valve cavity 1001, the stable installation of the limit member 1002 can be realized, and the displacement of the limit member 1002 caused by the movement of the valve core 210 can be avoided, affecting the limiting effect of the limit member 1002.
[0064] In this embodiment, the limit member 1002 is a retaining ring, which is convenient for installation and has a low processing cost. Of course, in other embodiments, the limit member 1002 can also be a protrusion protruding from the inner wall of the valve cavity 1001, and this design can also achieve the above effects.
[0065] The above embodiments only illustrate the basic principles and characteristics of the present utility model. The present utility model is not limited by the above embodiments. Without departing from the spirit and scope of the present utility model, various changes and modifications can be made to the present utility model, and these changes and modifications all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A two-way overflow valve, characterized in that, Comprising: A valve seat (100) having a valve chamber (1001), a first valve port (111) and a second valve port (112); A valve core assembly (200) slidably disposed in the valve chamber (1001) and capable of selectively opening and closing a passage between the first valve port (111) and the second valve port (112); A first spring seat (300) slidably disposed in the valve chamber (1001), with a first abutting surface (3011) provided at one end of the first spring seat (300) away from the valve core assembly (200); A pressure regulating spring (400) located in the valve chamber (1001), and both ends of the pressure regulating spring (400) abut against the valve core assembly (200) and the first spring seat (300) respectively; An adjusting rod (500) partially passing through the valve seat (100) and adjustably connected to the valve seat (100), with a second abutting surface (501) provided at one end of the adjusting rod (500) facing the first spring seat (300), the first abutting surface (3011) and the second abutting surface (501) abut against each other and can rotate relative to each other, and at least one of them is provided with a protruding portion.
2. The bi-directional overflow valve according to claim 1, characterized in that, The second abutting surface (501) is a spherical surface to form the protruding portion, and the first abutting surface (3011) is a flat surface; or The first abutting surface (3011) is a spherical surface to form the protruding portion, and the second abutting surface (501) is a flat surface.
3. The bi-directional overflow valve according to claim 2, wherein A receiving groove (301) is provided at one end of the first spring seat (300) away from the valve core assembly (200), and a part of the adjusting rod (500) is received in the receiving groove (301).
4. The two-way overflow valve according to claim 1, wherein The valve core assembly (200) includes: A valve core (210) slidably disposed in the valve chamber (1001); A second spring seat (220) located between the valve core (210) and the pressure regulating spring (400), and one end of the pressure regulating spring (400) away from the first spring seat (300) abuts against the second spring seat (220).
5. The bi-directional overflow valve according to claim 4, wherein A spherical groove (221) is provided on one side of the second spring seat (220) facing the valve core (210), and an arc transition surface (211) is provided on one side of the valve core (210) facing the second spring seat (220), and the arc transition surface (211) abuts against the spherical groove (221).
6. The bi-directional overflow valve according to claim 4, characterized in that, Both the first spring seat (300) and the second spring seat (220) are in the shape of a stepped shaft. One end of the pressure regulating spring (400) passes through the small-diameter section of the first spring seat (300) and abuts against the stepped surface of the first spring seat (300). The other end of the pressure regulating spring (400) passes through the small-diameter section of the second spring seat (220) and abuts against the stepped surface of the second spring seat (220).
7. The bi-directional overflow valve according to claim 4, wherein A limiting protrusion (213) is provided on the outer wall of the valve core (210), and a limiting member (1002) is provided in the valve cavity (1001). The limiting protrusion (213) and the limiting member (1002) cooperate to limit the moving distance of the valve core (210) in the direction of compressing the pressure regulating spring (400).
8. The bi-directional overflow valve according to claim 7, wherein, A limiting groove (1003) is provided on the inner wall of the valve cavity (1001), and the limiting member (1002) is limit-mounted in the limiting groove (1003).
9. The bi-directional overflow valve according to claim 7, wherein, The limiting member (1002) is a retaining ring; or the limiting member (1002) is a protruding portion protruding from the inner wall of the valve cavity (1001).
10. The bi-directional overflow valve according to claim 4, characterized in that, The valve core (210) includes a valve core body (2101) and a valve core protrusion (2102) protruding from the valve core body (2101). The valve core body (2101) is in sealing contact with the inner wall of the valve cavity (1001), and there is a gap between the valve core protrusion (2102) and the inner wall of the valve cavity (1001). The valve core protrusion (2102) can block the first valve port (111); and when the valve core protrusion (2102) blocks the first valve port (111), the second valve port (112) is communicated with the gap.