A bidirectional balancing valve

Abstract

This application relates to the field of hydraulic control technology and discloses a bidirectional balancing valve. It comprises a valve body with an installation cavity and a balancing assembly at least partially installed in the installation cavity. The balancing assembly includes a balancing valve core, a one-way valve core, a first elastic element, and a spring seat. The spring seat is fixed to the cavity wall of the installation cavity. At least a portion of the first elastic element is located within the spring seat. At least a portion of the one-way valve core is slidably disposed within the spring seat. A valve port is formed between the balancing valve core and the one-way valve core. Along the axial direction of the balancing valve core, the first elastic element can apply a force towards the one-way valve core to close the valve port. On one hand, the spring seat is used to install the first elastic element; on the other hand, during the opening or closing of the valve port, the one-way valve core slides against the spring seat, reducing wear on the valve body. The spring seat performs two or more functions, improving the service life of the balancing valve while reducing the number of parts.

Description

Technical Field

[0001] This application relates to the field of hydraulic control technology, and in particular to a bidirectional balance valve. Background Technology

[0002] Two-way balance valve assemblies are widely used in hydraulic systems and are key hydraulic components in heavy-duty machinery. They work in conjunction with hydraulic cylinders; the valve on one side opens only when oil is supplied and the pressure exceeds the set opening pressure of the balance valve, thus actuating the cylinder. When neither side is supplied with oil, both balance valves are closed, effectively cutting off the circuit on both sides of the cylinder and preventing it from changing position due to external forces.

[0003] In related technologies, the structure of the balance valve is relatively complex, and how to simplify the product and reduce the number of parts has become a problem to be solved. Utility Model Content

[0004] This application provides a two-way balance valve, which reduces the number of parts by fixing the first elastic element and the one-way valve core with a spring seat.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application propose a bidirectional balancing valve, comprising: a valve body having an installation cavity and a balancing assembly at least partially installed in the installation cavity. The balancing assembly includes a balancing valve core, a one-way valve core, a first elastic element, and a spring seat. The spring seat is fixed to the cavity wall of the installation cavity. At least a portion of the first elastic element is located in the spring seat. At least a portion of the one-way valve core is slidably disposed within the spring seat. A valve port is formed between the balancing valve core and the one-way valve core. Along the axial direction of the balancing valve core, the first elastic element can apply a force toward the one-way valve core to close the valve port.

[0007] The bidirectional balancing valve provided in this application embodiment has a spring seat between the valve body and the one-way valve core. On the one hand, the spring seat is used to install the first elastic element. On the other hand, during the opening or closing of the valve port, the one-way valve core slides with the spring seat, which can reduce the wear on the valve body. The spring seat has two or more functions, which improves the service life of the balancing valve and reduces the number of parts.

[0008] Optionally, the spring seat is fixed to the valve body by press fitting, and the spring seat is interference-fitted with the mounting cavity.

[0009] To improve the stability of the connection between the spring seat and the valve body, the spring seat and the valve body are fixed in the mounting cavity by press fitting. The interference fit between the two reduces leakage caused by the installation gap between the spring seat and the valve body, and prevents the spring seat from moving when the one-way valve core moves, thus affecting the stability of the two-way balance valve.

[0010] Optionally, the spring seat includes a base and a cylindrical portion, the base being radially protruding relative to the cylindrical portion, and the balancing assembly further includes a first elastic element, at least a portion of which is located in the cylindrical portion, one side of the first elastic element abutting against the base, and the other side of the first elastic element abutting against a one-way valve core, the one-way valve core contacting the balancing valve core under the force of the first elastic element.

[0011] The spring seat consists of a base and a cylindrical part. The cylindrical part is used to fit over the one-way valve core to protect the valve body from wear. The base design provides support for the first elastic element. One side of the first elastic element abuts against the base, and the other side abuts against the one-way valve core, providing a stable first elastic force for the one-way valve core. This reduces the number of parts and improves the stability of the bidirectional balance valve.

[0012] Optionally, the base and the cylindrical part are an integral structure, the base has a channel, the balance valve core passes through the channel, and along the radial direction of the balance valve core, the balance valve core and the base have a first gap that allows fluid to pass through.

[0013] The base is bent inward in a ring shape relative to the cylindrical part, and can be integrally formed by deep drawing, flanging and other methods. The hole is also integrally formed into the base, which simplifies the processing difficulty of the spring seat and reduces the processing cost.

[0014] Optionally, the wall forming the mounting cavity includes a stepped wall, and one end of the spring seat abuts against the stepped wall along the axial direction of the balance valve core.

[0015] When installing the spring seat, the spring seat enters from one side of the mounting cavity and is installed until the end of the spring seat abuts against the stepped wall for limitation. This completes the installation. On the one hand, the stepped wall provides support for the spring seat and the first elastic element, providing stability for the fluid inside the bidirectional balance valve. On the other hand, it eliminates the need for components such as snap rings to fix the spring seat, simplifying the number of product parts.

[0016] Optionally, the hardness of the spring seat is greater than the hardness of the valve body.

[0017] Typically, a flow channel is provided within the valve body to connect various valve components. Due to performance requirements, the valve body is preferably made of aluminum. The one-way valve core slides with a spring seat. The spring seat is made of a material with a hardness greater than that of the valve body. Compared to a setting where the hardness of the spring seat is less than or equal to that of the valve body, this can significantly reduce the wear of the spring seat.

[0018] Optionally, the balancing assembly includes a sealing portion, at least a portion of which is located between the one-way valve core and the spring seat. Along the radial direction of the balancing valve core, one side of the sealing portion abuts against the one-way valve core, and the other side of the sealing portion abuts against the spring seat.

[0019] Under fluid pressure, the one-way valve core can slide towards the bottom of the base to open the valve port. It is required that the two spaces separated by the valve port are not connected when initially closed; otherwise, the pressure will be difficult to increase to the opening pressure. A sealing element between the one-way valve core and the spring seat can reduce internal leakage and improve the performance of the bidirectional balancing valve.

[0020] Optionally, at least two mounting cavities are provided, and a connecting cavity is opened in the valve body to connect the two mounting cavities. A slider is provided in the valve body, and at least a part of the slider is slidably mounted in the connecting cavity. The slider can move in the connecting cavity to push the balance valve core to move and open the valve port.

[0021] The valve body is equipped with at least two sets of balancing components, and the two sets of balancing components form a passage through a connecting cavity. When there is a pressure difference between the two mounting cavities, the slider will be pushed to the side with lower pressure. The slider can push the balancing valve core on that side to open the valve port, so as to achieve the effect of pressure relief.

[0022] Optionally, the valve body has a C port and a V port, the V port being away from the communicating cavity relative to the C port, the valve port being located between the C port and the V port, and the one-way valve core and the balance valve core opening the valve port relative to each other to connect the C port and the V port.

[0023] The present application provides a bidirectional balancing valve, which reduces wear on the valve body and improves the service life of the bidirectional balancing valve by providing a spring seat between the valve body and the one-way valve core during the opening or closing of the valve port. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the bidirectional balancing valve provided in the embodiments of this application;

[0026] Figure 2This is a cross-sectional schematic diagram of the valve body provided in an embodiment of this application;

[0027] Figure 3 This is a partial cross-sectional schematic diagram provided for an embodiment of this application;

[0028] Figure 4 for Figure 1 A magnified view of a portion of point A with the valve open.

[0029] Figure 5 for Figure 1 A magnified view of a portion of point A with the valve closed.

[0030] [Explanation of Labels in the Attached Image]

[0031] 1. Valve body; 1a. Mounting cavity; 1b. Bottom wall; 1c. Communicating cavity; 11. Stepped wall; 2. Balancing assembly; 21. Balancing valve core; 21a. Balancing channel; 22. One-way valve core; 23. Spring seat; 231. Base; 232. Cylindrical part; 24. Sealing part; 25. Second elastic element; 26. First elastic element; 27. Valve port; 28. First gap; 3. Valve seat; 3a. First port; 3b. Second port; 41. Slider; 51. C1 oil port; 52. C2 oil port; 53. V1 oil port; 54. V2 oil port. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In hydraulic systems, a two-way balance valve is typically used in conjunction with a hydraulic cylinder. The valve on the other side can only open and activate the cylinder when oil is supplied to one side and the pressure exceeds the valve's opening pressure setting. When neither side is supplied with oil, both balance valves are closed, effectively creating a circuit breaker on both sides of the cylinder, ensuring that the cylinder's position is not altered by external forces.

[0035] This application provides an embodiment of a bidirectional balancing valve, referring to... Figure 1 and Figure 2The bidirectional balancing valve includes a valve body 1 and balancing components 2. At least two sets of balancing components 2 are provided. The valve body 1 has mounting cavities 1a, the number of which corresponds to the number of balancing components 2. At least a portion of one set of balancing components 2 is installed in one mounting cavity 1a. The valve body 1 has C-ports and V-ports. Typically, C-ports are used to connect to the hydraulic cylinder, and V-ports are used to connect to various valve components. Specifically, C-ports include C1 port 51 and C2 port 52, and V-ports include V1 port 53 and V2 port 54. C1 port 51 and V1 port 53 are located on one side of the valve body 1 (corresponding to the left side in the figure), and C2 port 52 and V2 port 54 are located on the other side of the valve body 1 (corresponding to the right side in the figure).

[0036] Reference Figure 3 and Figure 4 Each balancing component 2 includes a balancing valve core 21 and a one-way valve core 22, both of which are installed in the mounting cavity 1a. The balancing valve core 21 passes through the one-way valve core 22. The balancing component 2 has a valve port 27. Along the axial direction of the balancing valve core 21, the one-way valve core 22 can cooperate with the balancing valve core 21 to open the valve port 27 in one direction. A connecting cavity 1c is provided in the valve body 1. The connecting cavity 1c extends along the axial direction of the balancing valve core 21 and connects the two mounting cavities 1a. A slider 41 is also provided in the valve body 1. At least a portion of the slider 41 is slidably installed in the connecting cavity 1c. The slider 41 can move within the connecting cavity 1c to push the balancing valve core 21 in the other mounting cavity 1a to move in the opposite direction and open the valve port 27.

[0037] Ports C1 51 and V1 53 are located on opposite sides of valve port 27. Port C1 51 is closer to the connecting cavity 1c than port V1 53. When valve port 27 is open, ports C1 51 and V1 53 are connected. The connection between ports C2 52 and V2 54 is similar. When oil enters through port V1 53, the one-way valve core 22 can be pushed open under the pressure of the oil. In another operating condition, when the oil pressure in one mounting cavity 1a is greater than the oil pressure in the other mounting cavity, the slider 41 moves towards the side with lower oil pressure under the action of hydraulic pressure, pushing the balance valve core on that side to open the valve port and release pressure.

[0038] Specifically, the bidirectional balancing valve also includes a valve seat 3, a portion of which is inserted into the mounting cavity 1a, and the valve seat 3 is fixed to the valve body 1. In this embodiment, the valve seat 3 is threadedly connected to the valve body 1, and a sealing ring is also fitted on the outside of the valve seat 3. During the installation of the valve seat 3, the valve seat 3 and the valve body 1 clamp the sealing ring to reduce external leakage.

[0039] Reference Figure 3 , Figure 4 and Figure 5The bidirectional balancing valve further includes a first elastic element 26, a second elastic element 25, and a spring seat 23. At least a portion of the second elastic element 25 and the balancing valve core 21 are located within the valve seat 3. One side of the second elastic element 25 abuts against the valve seat 3, and the other side abuts against the balancing valve core 21, providing a rightward force to the balancing valve core 21. The outer wall of the spring seat 23 is fixed to the valve body 1. At least a portion of the one-way valve core 22 and the first elastic element 26 are located within the spring seat 23. One side of the first elastic element 26 abuts against the spring seat 23, and the other side abuts against the one-way valve core 22, enabling the application of a force towards the balancing valve core 21 to the one-way valve core 22. A valve port 27 is formed between the balancing valve core 21 and the one-way valve core 22. Along the axial direction of the one-way valve core 22, the one-way valve core 22 and the spring seat 23 can slide to close the valve port 27.

[0040] A spring seat 23 is provided between the valve body 1 and the one-way valve core 22. On the one hand, the spring seat 23 is used to install the first elastic element 26. On the other hand, during the opening or closing of the valve port 27, the one-way valve core 22 slides against the spring seat 23, which can reduce wear on the valve body 1. The spring seat 23 has two or more functions, which improves the service life of the balance valve and reduces the number of parts. In this embodiment, the second elastic element 25 and the first elastic element 26 can be springs, or other components with restoring force or that apply force to the balance valve core 21 or the one-way valve core 22. No limitation is made here.

[0041] Reference Figure 3 , Figure 4 and Figure 5 A sealing ring is provided at the end of the balance valve core 21 away from the second elastic element 25. This end of the balance valve core 21 can slide against the inner wall of the mounting cavity 1a. Along the radial direction of the balance valve core 21, one side of the sealing ring abuts against the inner wall of the mounting cavity 1a, and the other side of the sealing ring abuts against the balance valve core 21, so that the connecting cavity 1c and the C1 oil port 51 are not interconnected. The mounting cavity 1a has a bottom wall 1b on the side away from its opening. The force applied by the second elastic element 25 to the balance valve core 21 causes the end of the balance valve core 21 away from the second elastic element 25 to abut against the bottom wall 1b; while the force applied by the first elastic element 26 to the one-way valve core 22 causes the one-way valve core 22 to abut against the balance valve core 21. The first elastic element 26 provides the force for the one-way valve core 22 to close the valve port 27. When the forces on both sides reach equilibrium, the valve port 27 is closed, which is the closed valve state.

[0042] Aluminum, as a commonly used material in the valve industry, possesses inherent machinability, corrosion resistance, and lightweight properties, making it particularly suitable for small to medium-sized, mass-produced hydraulic components. Therefore, valve bodies are typically made of aluminum or aluminum alloy. However, during experiments, it was found that aluminum components have poor wear resistance, and when used in valve products, the moving parts are prone to wear.

[0043] Therefore, the spring seat 23 is further configured with a material whose hardness is greater than that of the valve body 1, such as steel. When the V1 oil port 53 is used as the inlet, the one-way valve core 22 slides with the spring seat 23. Setting the spring seat 23 with a material whose hardness is greater than that of the valve body 1, compared to setting the hardness of the spring seat 23 to be less than or equal to that of the valve body 1, can reduce the wear of the spring seat 23 to a greater extent, which is beneficial to extending the service life of the bidirectional balance valve and is suitable for scenarios that require frequent operation and are prone to wear.

[0044] In this embodiment, the spring seat 23 is fixed to the valve body 1 by press fitting, and the spring seat 23 is interference-fitted with the cavity wall of the mounting cavity 1a. To improve the stability of the connection between the spring seat 23 and the valve body 1, the spring seat 23 and the valve body 1 are fixed to the mounting cavity 1a by press fitting. The interference fit between the two can reduce leakage caused by the installation gap between the spring seat 23 and the valve body 1, and also prevent the spring seat 23 from loosening and affecting the stability of the bidirectional balance valve when the one-way valve core 22 is actuated.

[0045] The spring seat 23 includes a base 231 and a cylindrical portion 232. The cylindrical portion 232 is hollow. At least a portion of the one-way valve core 22 and the first elastic member 26 are located inside the cylindrical portion 232. The base 231 is located at one end of the cylindrical portion 232 and protrudes radially relative to the cylindrical portion 232 to provide support for the first elastic member 26. One side of the first elastic member 26 abuts against the one-way valve core 22 and the other side abuts against the base 231. Under the force of the first elastic member 26, the one-way valve core 22 abuts against the balance valve core 21.

[0046] Furthermore, the spring seat 23 is configured as a base 231 and a cylindrical part 232. The cylindrical part 232 is used to sleeve the one-way valve core 22 to protect the valve body 1 from wear. The design of the base 231 provides support for the first elastic element 26. One side of the first elastic element 26 abuts against the base 231, and the other side abuts against the one-way valve core 22, providing a stable force of the first elastic element 26 to the one-way valve core 22. On the one hand, it reduces the number of parts, and on the other hand, it improves the stability of the bidirectional balance valve.

[0047] In some embodiments, the base 231 and the cylindrical portion 232 are integral structures, formed by forging, stamping, or other methods. The base 231 has a channel through which the balance valve core 21 passes. Along the radial direction of the balance valve core 21, the balance valve core 21 and the base 231 have a first gap 28 for fluid to pass through. Oil entering from the V1 port 53 can flow to the C1 port 51 through the first gap 28. The channel is also integrally formed on the base 231, simplifying the processing difficulty of the spring seat 23 and reducing processing costs.

[0048] The balancing assembly 2 includes a sealing portion 24, at least a portion of which is located between the one-way valve core 22 and the spring seat 23. Along the radial direction of the balancing valve core 21, one side of the sealing portion 24 abuts against the one-way valve core 22, and the other side abuts against the spring seat 23. The sealing portion 24 is configured to be at least partially elastic, allowing it to close the gap between the one-way valve core 22 and the spring seat 23. In this embodiment, the sealing portion 24 can be a sealing ring or a Glyd ring, etc.; in other embodiments, the structure described above is not limited to.

[0049] Under fluid pressure, the one-way valve core 22 can slide towards the bottom of the base 231 to open the valve port 27. It is required that the two spaces separated by the valve port 27 are not connected when initially closed; otherwise, the pressure will be difficult to increase to the opening pressure. A sealing part 24 is provided between the one-way valve core 22 and the spring seat 23 to reduce internal leakage and improve the performance of the bidirectional balancing valve.

[0050] The wall forming the mounting cavity 1a includes a stepped wall 11, which is located between the C1 oil port 51 and the V1 oil port 53 along the axial direction of the balance valve core 21. One end of the spring seat 23 abuts against the stepped wall 11 to achieve axial positioning during installation.

[0051] When installing the spring seat 23, the spring seat 23 enters from one side of the opening of the mounting cavity 1a and is installed until the bottom of the spring seat 23 abuts against the stepped wall 11 to limit its position. On the one hand, the step wall 11 can provide support for the spring seat 23 and the first elastic element 26, providing stability for the fluid in the bidirectional balance valve. On the other hand, in order to fix the spring seat 23, the elimination of components such as snap rings is eliminated, simplifying the number of product components and providing convenience for installation.

[0052] The valve seat 3 also has a first port 3a and a second port 3b, both of which are located on the side wall of the valve seat 3, allowing communication between the inner and outer sides of the valve seat 3. The first port 3a is farther away from the one-way valve core 22 than the second port 3b. The balance valve core 21 has a balance channel 21a, which is an axially penetrating channel through the balance valve core 21. In the closed state, the oil from the V1 port 53 can enter the valve seat 3 through the first port 3a and then exert a force on the slider 41 through the balance channel 21a. Normally, the flow area of ​​the first port 3a is smaller than that of the second port 3b. The oil from the V1 port 53 enters the valve seat 3 through the second port 3b. When the oil pressure reaches the opening force of the one-way valve core 22, the one-way valve core 22 is pushed open, completing the pressure relief.

[0053] The overall working principle of this scheme is as follows: When oil enters through port V1 53, the hydraulic oil is divided into two paths. One path enters through port 3b. When the oil pressure is greater than the force exerted by the first elastic element 26 on the one-way valve core 22, the oil pushes the one-way valve core 22 to open the valve port 27, allowing the hydraulic oil entering from port V1 53 to flow into the rod chamber of the cylinder through port 27 and finally through port C1 51. The other path enters the valve seat 3 from port 3a and then enters the balance channel 21a. When the oil pressure reaches the set pressure, it pushes the slider 41 to move, thereby pushing the balance valve core 21 in another mounting cavity 1a to move. The valve port on this side is then opened, allowing the hydraulic oil in the rodless cavity of the cylinder to enter the mounting cavity 1a on this side through port C2 52 and finally flow out from port V2 54 through the valve port on this side. Conversely, when oil enters through port V2 54, one stream of hydraulic oil flows into the rodless chamber of the cylinder through the right valve port, while the other stream pushes the slider 41 to the left, opening the left valve port 27. This allows the oil in the rod chamber of the cylinder to flow out from port C1 51 through valve port 27 and out through port V1 53. This reciprocating cycle allows the cylinder piston rod to move left and right or up and down to perform the desired action. When the oil flow is simultaneously cut off at ports V1 53 and V2 54, the cylinder can be locked, keeping the load in a stable state.

[0054] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The above descriptions are merely embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

[0056] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A bidirectional balancing valve, characterized in that, include: A valve body (1) having an installation cavity (1a) and a balancing assembly (2) at least partially installed in the installation cavity (1a). The balancing assembly (2) includes a balancing valve core (21), a one-way valve core (22), a first elastic element (26), and a spring seat (23). The spring seat (23) is fixed to the cavity wall of the installation cavity (1a). At least a portion of the first elastic element (26) is located in the spring seat (23). At least a portion of the one-way valve core (22) is slidably disposed in the spring seat (23). A valve port (27) is formed between the balancing valve core (21) and the one-way valve core (22). Along the axial direction of the balancing valve core (21), the first elastic element (26) can apply a force toward the balancing valve core (21) to the one-way valve core (22) to close the valve port (27).

2. The bidirectional balancing valve according to claim 1, characterized in that, The spring seat (23) is fixed to the valve body (1) by press fitting, and the spring seat (23) is interference-fitted with the cavity wall of the mounting cavity (1a).

3. The bidirectional balancing valve according to claim 1, characterized in that, The spring seat (23) includes a base (231) and a cylindrical portion (232). The base (231) protrudes radially relative to the cylindrical portion (232). At least a portion of the first elastic member (26) is located in the cylindrical portion (232). One side of the first elastic member (26) abuts against the base (231), and the other side of the first elastic member (26) abuts against the one-way valve core (22). The one-way valve core (22) abuts against the balance valve core (21) under the force of the first elastic member (26).

4. The bidirectional balancing valve according to claim 3, characterized in that, The base (231) and the cylindrical part (232) are an integral structure. The base (231) has a channel, and the balance valve core (21) passes through the channel. Along the radial direction of the balance valve core (21), the balance valve core (21) and the base (231) have a first gap (28) through which fluid can pass.

5. The bidirectional balancing valve according to claim 1, characterized in that, The wall forming the mounting cavity (1a) includes a stepped wall (11) along the axial direction of the balance valve core (21), and one end of the spring seat (23) abuts against the stepped wall (11).

6. The bidirectional balancing valve according to claim 5, characterized in that, The hardness of the spring seat (23) is greater than that of the valve body (1).

7. The bidirectional balancing valve according to claim 6, characterized in that, The balancing assembly (2) includes a sealing part (24), at least a portion of which is located between the one-way valve core (22) and the spring seat (23). Along the radial direction of the balancing valve core (21), one side of the sealing part (24) abuts against the one-way valve core (22), and the other side of the sealing part (24) abuts against the spring seat (23).

8. The bidirectional balancing valve according to any one of claims 1-7, characterized in that, At least two mounting cavities (1a) are provided. A connecting cavity (1c) connecting the two mounting cavities (1a) is provided in the valve body (1). A slider (41) is provided in the valve body (1). At least a part of the slider (41) is slidably mounted in the connecting cavity (1c). The slider (41) can move in the connecting cavity (1c) to push the balance valve core (21) to move and open the valve port (27).

9. The bidirectional balancing valve according to claim 8, characterized in that, The valve body (1) has a C port and a V port. The V port is far away from the communicating cavity (1c) relative to the C port. The valve port (27) is located between the C port and the V port. The one-way valve core (22) and the balance valve core (21) move relative to each other to open the valve port (27) so that the C port and the V port are connected.

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