A valve device

Abstract

The application provides a valve device, which comprises a valve body, an adjusting assembly and a balancing assembly installed on the valve body, the valve body is provided with an inlet and an outlet, the adjusting assembly comprises an adjusting valve core, the adjusting valve core can adjust the opening degree of the inlet, the balancing assembly comprises a diaphragm and a balancing valve core connected with the diaphragm, the side of the diaphragm far from the inlet is formed with a high-pressure cavity, the side of the diaphragm close to the inlet is formed with a low-pressure cavity, the low-pressure cavity is communicated with the outlet, the balancing valve core is connected to the side of the diaphragm close to the inlet, the balancing valve core is sleeved on the outer periphery of the adjusting valve core, the adjusting valve core is provided with a pressure guide channel, the pressure guide channel is communicated with the high-pressure cavity and the inlet, the balancing valve core is provided with a balancing valve core cavity, the balancing valve core cavity is communicated with the inlet, the end of the balancing valve core far from the diaphragm and the valve body form an outlet channel, and the outlet channel is communicated with the inlet and the outlet. The valve device realizes the integration of the flow adjusting function and the flow maintaining function, and has the advantages of small volume and low cost.

Description

Technical Field

[0001] This application relates to the field of fluid control equipment technology, and in particular to a valve device. Background Technology

[0002] In some applications, it is desirable to regulate fluid flow rate while maintaining a constant flow rate even with fluctuations in inlet and outlet pressures. While configuring a regulating valve and a balancing valve can meet this requirement, the cost of two valves is high, and they occupy a significant amount of space, making them unsuitable for confined spaces. Therefore, how to achieve flow regulation and flow rate maintenance under fluctuating inlet and outlet pressures in confined spaces is a technical problem that requires the expertise of those skilled in the art to solve. Utility Model Content

[0003] To solve the above-mentioned technical problems, this application provides a valve device, which includes a valve body and an adjusting component and a balancing component installed on the valve body. The valve body has an inlet and an outlet. The adjusting component includes an adjusting valve core, which can adjust the opening degree of the inlet. The balancing component includes a diaphragm and a balancing valve core connected to the diaphragm. A high-pressure chamber is formed on the side of the diaphragm away from the inlet, and a low-pressure chamber is formed on the side closer to the inlet. The low-pressure chamber is connected to the outlet. The balancing valve core is connected to the side of the diaphragm close to the inlet and is sleeved on the outer periphery of the adjusting valve core. The adjusting valve core has a pressure guiding channel that connects the high-pressure chamber and the inlet. The balancing valve core has a balancing valve core cavity that connects to the inlet. An outflow channel is formed between the end of the balancing valve core away from the diaphragm and the valve body, and the outflow channel connects the inlet and the outlet.

[0004] In one alternative embodiment of the valve device, the valve body is provided with a mounting port for mounting the balancing component and the regulating component. The valve device includes a valve cover connected to the mounting port. The outer edge of the diaphragm is clamped between the valve cover and the valve body. The balancing component includes a pressure ring connected to the balancing valve core. The inner edge of the diaphragm is clamped between the pressure ring and the balancing valve core.

[0005] In one alternative embodiment of the valve device, the balancing valve core is provided with a pressure-blocking part and a threaded connection part. The threaded connection part is located at the end of the pressure-blocking part away from the inlet. The pressure ring is sleeved on the outer periphery of the threaded connection part and threadedly connected to the threaded connection part. The inner edge of the diaphragm is clamped between the pressure ring and the pressure-blocking part.

[0006] In one optional embodiment of the valve device, the balancing valve core further includes an inner ring portion, an outer ring portion, and a balancing sleeve portion. The inner ring portion is sleeved on the outer periphery of the regulating valve core, and the outer ring portion is spaced around the outer periphery of the inner ring portion. The pressure-blocking portion is disposed between the end of the outer ring portion away from the inlet and the end of the inner ring portion away from the inlet. The balancing sleeve portion is disposed at the end of the outer ring portion near the inlet, and the outflow channel is formed between the balancing sleeve portion and the valve body.

[0007] In one alternative embodiment of the valve device, the balancing assembly includes a balancing spring and a balancing spring seat. The balancing spring seat is located at one end of the inner ring near the inlet. One end of the balancing spring abuts against the pressing part, and the other end is connected to the balancing spring seat. The balancing spring can provide the balancing valve core with an elastic force toward the high-pressure chamber side.

[0008] In one optional embodiment of the valve device, the balance spring seat is spaced around the outer periphery of the regulating valve core, one end of the balance spring seat away from the inner ring abuts against the valve body, the balance sleeve is spaced around the outer periphery of the balance spring seat, and the balance spring seat is provided with a flow passage that connects the outlet channel and the inlet.

[0009] In one alternative embodiment of the valve device, the valve device includes a valve cover, and the adjusting assembly includes an adjusting nut and an adjusting spring. The adjusting nut passes through the central through hole of the valve cover and is threadedly connected to the valve cover. The end of the adjusting valve core away from the inlet abuts against the adjusting nut. The end of the adjusting spring near the inlet abuts against the valve cover, and the end of the adjusting spring away from the inlet abuts against the adjusting valve core. The adjusting spring is capable of providing the adjusting valve core with an elastic force away from the inlet.

[0010] In one optional embodiment of the valve device, the regulating valve core includes a body portion, an regulating rod portion, and an regulating sleeve portion. The body portion is provided with an inclined sealing surface capable of sealingly contacting the edge of the inlet. One end of the regulating rod portion is connected to the body portion. The regulating sleeve portion is sleeved on the outer periphery of the other end of the regulating rod portion. The regulating spring is sleeved on the outer periphery of the regulating rod portion, and the end of the regulating spring away from the inlet abuts against the regulating sleeve portion.

[0011] In one alternative embodiment of the valve device, the adjusting assembly includes a transmission rod that passes through the central hole of the adjusting nut. One end of the transmission rod is fixed to the adjusting valve core, and the other end of the transmission rod is used to connect to an electric adjusting mechanism.

[0012] In one optional embodiment of the valve device, a sealing ring is provided between the transmission rod and the inner side of the central hole of the adjusting nut. The inner side of the central hole of the adjusting nut is provided with a stepped surface. A pressure sleeve is assembled in the central hole of the adjusting nut. One end face of the pressure sleeve abuts against the stepped surface. The pressure sleeve and the adjusting nut together form a sealing ring mounting groove, and the sealing ring is installed in the sealing ring mounting groove.

[0013] The valve device provided in this application integrates regulation and flow retention functions. Compared with using one regulating valve to regulate flow and another balancing valve to retain flow, it reduces costs and space requirements. Moreover, the valve device has high integration, small size, and low processing cost. Attached Figure Description

[0014] Figure 1 A perspective view of one embodiment of the valve device provided in this application;

[0015] Figure 2 for Figure 1 FF section view;

[0016] Figure 3 for Figure 2 Enlarged view of the central balance valve core;

[0017] Figure 4 for Figure 2 Enlarged view of the regulating valve core.

[0018] The annotations in the attached figures are explained as follows:

[0019] 10 Valve body, 101 Inlet, 102 Outlet, 103 Mounting port;

[0020] 20 Adjustment assembly, 201 Adjustment valve core, 201a Body part, X Inclined sealing surface, 201b Adjustment rod part, 201c Adjustment sleeve part, 202 Adjustment nut, 202a Stepped surface, 203 Adjustment spring, 204 Transmission rod, 205 Sealing ring, 206 Pressure sleeve;

[0021] 30 Valve cover;

[0022] 40 Balance assembly, 401 Diaphragm, 402 Balance valve core, 402a Pressing part, 402b Threaded connection part, 402c Inner ring part, 402d Outer ring part, 402e Balance sleeve part, 403 Pressure ring, 404 Balance spring, 405 Balance spring seat.

[0023] 50 First monitoring component;

[0024] 60 Second monitoring component;

[0025] 70 caps;

[0026] A. High-pressure chamber, B. Low-pressure chamber, C. Pressure guiding channel, D. Outflow channel, E. Balance valve core chamber. Detailed Implementation

[0027] This application provides a valve device. In order to enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 and Figure 2 As shown, the valve device provided in this application includes a valve body 10, an adjustment component 20 and a balancing component 40 installed on the valve body 10.

[0029] The valve body 10 is provided with an inlet 101 and an outlet 102. The regulating assembly 20 includes a regulating valve core 201, which can regulate the opening degree of the inlet 101.

[0030] The balancing assembly 40 includes a diaphragm 401 and a balancing valve core 402 connected to the diaphragm 401. A high-pressure chamber A is formed on the side of the diaphragm 401 away from the inlet 101 (upper side in the figure), and a low-pressure chamber B is formed on the side of the diaphragm 401 closer to the inlet 101 (lower side in the figure).

[0031] The balance valve core 402 is connected to the side of the diaphragm 401 near the inlet 101 (lower side in the figure), so that the balance valve core 402 and the low-pressure chamber B are located on the same side of the diaphragm 401. The balance valve core 402 is sleeved on the outer periphery of the regulating valve core 201. The regulating valve core 201 is provided with a pressure guiding channel C, which connects the high-pressure chamber A and the inlet 101. In the figure, the pressure guiding channel C includes a main channel extending along the length of the regulating valve core 201 from one end face of the regulating valve core 201 near the inlet 101 (lower end face in the figure) and a branch channel penetrating the main channel radially along the regulating valve core 201.

[0032] The balance valve core 402 is provided with a balance valve core cavity E. An outflow channel D is formed between the end of the balance valve core 402 away from the diaphragm 401 and the valve body 10, and the outflow channel D connects the outlet 102 and the inlet 101.

[0033] When the valve device described above is in operation, the fluid flowing in from inlet 101 is divided into several parts. Part flows through pressure channel C into high-pressure chamber A, where the pressure is P1, thus exerting a force P1 on diaphragm 401 towards low-pressure chamber B (facing downwards in the diagram). Part flows into the balance valve core chamber E, where the pressure is P2, also exerting a force P2 on diaphragm 401 towards high-pressure chamber A (facing upwards in the diagram). A third part flows out through outlet channel D from outlet 102. Since low-pressure chamber B is connected to outlet 102, the pressure at outlet 102 is P3, which in turn exerts a force P3 on diaphragm 401 towards high-pressure chamber A (facing upwards in the diagram). When the forces acting on both sides of diaphragm 401 are equal, the balance valve core 402 is in a balanced position.

[0034] Pressure changes at inlet 101 will cause a change in the balance position of the balance valve core 402:

[0035] When the pressure at inlet 101 increases, the force P1 increases, causing the diaphragm 401 to float towards the low-pressure chamber B. This, in turn, causes the balance valve core 402 to float closer to the outlet channel D, reducing the flow area of ​​the outlet channel D and thus maintaining a constant flow rate. The reduced flow area of ​​the outlet channel D leads to an increase in the pressure P2 within the balance valve core cavity E, further increasing the force P2. This, in turn, allows the balance valve core 402 to stabilize at a new equilibrium position.

[0036] When the pressure at inlet 101 decreases, the force P1 decreases, causing the diaphragm 401 to float towards the high-pressure chamber A. This, in turn, causes the balance valve core 402 to float away from the outlet channel D, increasing the flow area of ​​the outlet channel D and thus maintaining a constant flow rate. The increased flow area of ​​the outlet channel D leads to a decrease in the pressure P2 within the balance valve core cavity E, further reducing the force P2 and enabling the balance valve core 402 to stabilize at a new equilibrium position.

[0037] The aforementioned valve device can reduce the opening of inlet 101 by driving the regulating valve core 201 to move closer to inlet 101 or increase the opening of inlet 101 by moving it further away from inlet 101, thus allowing adjustment of the target flow rate as needed. Furthermore, the change in force on both sides of the diaphragm 401 can automatically cause the balancing valve core 402 to float, changing the flow area of ​​the outlet channel D, thereby maintaining a constant flow rate during pressure fluctuations. Therefore, it integrates regulation and flow maintenance functions. Compared to using one regulating valve for flow regulation and another balancing valve for flow maintenance, it reduces cost and space requirements.

[0038] Furthermore, since the balance valve core 402 is fitted around the outer periphery of the regulating valve core 201, the axial dimension and overall volume of the valve device are small, which is more conducive to saving space. Moreover, by utilizing the gap between the balance valve core 402 and the valve body 10 to form the outflow channel D, the machining steps of creating a channel are avoided, further reducing costs. Furthermore, by creating the pressure guiding channel C on the regulating valve core 201, the machining cost of the pressure guiding channel C is lower, thus further reducing costs.

[0039] Specifically, the valve body 10 is provided with a mounting port 103 for mounting the balancing assembly 40 and the regulating assembly 20, and a valve cover 30 is assembled at the mounting port 103. The connection method between the valve cover 30 and the valve body 10 is not limited, for example, it can be threaded, flanged, or welded. In addition, a sealing element is provided between the valve body 10 and the valve cover 30 to ensure sealing.

[0040] In the illustrated embodiment, as Figure 2 As shown, the outer edge of the diaphragm 401 is clamped between the valve cover 30 and the valve body 10. The balancing assembly 40 includes a pressure ring 403. The pressure ring 403 is connected to the balancing valve core 402. The inner edge of the diaphragm 401 is clamped between the pressure ring 403 and the balancing valve core 402. This design makes it less likely for the diaphragm 401 to detach from the valve body 10, and when the diaphragm 401 floats, the balancing valve core 402 and the pressure ring 403 float more easily along with it.

[0041] More specifically, in combination Figure 2 and Figure 3 As shown, the balance valve core 402 has a pressing part 402a and a threaded connection part 402b. The threaded connection part 402b is located at the end of the pressing part 402a away from the inlet 101, and the outer diameter of the pressing part 402a is larger than the outer diameter of the threaded connection part 402b. The pressure ring 403 is sleeved on the outside of the threaded connection part 402b and threadedly connected to the threaded connection part 402b. The inner edge of the diaphragm 401 is clamped between the pressure ring 403 and the pressing part 402a.

[0042] In actual implementation, the installation method of diaphragm 401 is not limited to this. As long as it is ensured that diaphragm 401 and balance valve core 402 can float together, and diaphragm 401 is supported by valve body 10 and is not easy to fall off valve body 10, it is acceptable.

[0043] In the illustrated embodiment, combined with Figure 2 and Figure 3As shown, the balancing valve core 402 includes an inner ring portion 402c, an outer ring portion 402d, and a balancing sleeve portion 402e. The inner ring portion 402c is sleeved on the outer periphery of the regulating valve core 201, and a sealing element is provided between the inner ring portion 402c and the regulating valve core 201 to ensure sealing. The outer ring portion 402d is spaced around the outer periphery of the inner ring portion 402c, that is, the outer ring portion 402d and the inner ring portion 402c are radially spaced from each other, and the annular space between the outer ring portion 402d and the inner ring portion 402c forms at least a portion of the balancing valve core cavity E. A pressure portion 402a is provided between the end of the outer ring portion 402d away from the inlet 101 and the end of the inner ring portion 402c away from the inlet 101. The balancing sleeve portion 402e is provided at the end of the outer ring portion 402d near the inlet 101. An outlet passage D is formed between the balancing sleeve portion 402e and the valve body 10. When the balancing valve core 402 moves to its limit position towards the outlet channel D, the balancing sleeve 402e abuts against the valve body 10. To prevent damage to the balancing sleeve 402e caused by water flow scouring and impact with the valve body 10, the balancing sleeve 402e is made of a high-strength material. The threaded connection 402b, the pressing part 402a, the inner ring part 402c, and the outer ring part 402d of the balancing valve core 402 can be configured as an integral structure. This integral structure can be made of plastic to save costs. The balancing sleeve 402e is assembled onto this integral structure.

[0044] In the illustrated embodiment, as Figure 2 As shown, the balancing assembly 40 includes a balancing spring 404 and a balancing spring seat 405. The balancing spring seat 405 is located at the end of the inner ring portion 402c near the inlet 101 (lower end in the figure). One end of the balancing spring 404 (upper end in the figure) abuts against the pressing portion 402a, and the other end (lower end in the figure) is connected to the balancing spring seat 405. The balancing spring 404 can provide the balancing valve core 402 with an elastic force toward the high-pressure chamber A side. When the above-mentioned force P1 is equal to the sum of the above-mentioned forces P2, P3 and the elastic force of the balancing spring 404, the balancing valve core 402 is in the balanced position.

[0045] In the illustrated embodiment, as Figure 2As shown, the balance spring seat 405 is spaced around the outer periphery of the regulating valve core 201. That is, the balance spring seat 405 and the regulating valve core 201 are radially spaced apart. Some fluid flowing in from the inlet 101 can pass through the gap between the balance spring seat 405 and the regulating valve core 201 to enter the balance valve core cavity E. The end of the balance spring seat 405 away from the inner ring portion 402c (lower end in the figure) abuts against the valve body 10. The balance sleeve portion 402e is spaced around the outer periphery of the balance spring seat 405. That is, the balance sleeve portion 402e and the balance spring seat 405 are radially spaced apart. This prevents the balance spring seat 405 from obstructing the floating of the balance valve core 402. The balance spring seat 405 is provided with a flow passage (not visible in the figure), which connects the outlet channel D and the inlet 101. Some fluid flowing in from the inlet 101 passes through the flow passage and the outlet channel D in sequence and flows out from the outlet 102.

[0046] In the illustrated embodiment, the adjusting assembly 20 includes an adjusting nut 202 and an adjusting spring 203. The adjusting nut 202 passes through the central through hole of the valve cover 30 and is threadedly connected to the valve cover 30. The end of the adjusting valve core 201 away from the inlet 101 abuts against the adjusting nut 202. The end of the adjusting spring 203 near the inlet 101 abuts against the valve cover 30, and the end of the adjusting spring 203 away from the inlet 101 abuts against the adjusting valve core 201. The adjusting spring 203 can provide the adjusting valve core 201 with an elastic force away from the inlet 101.

[0047] When it is necessary to reduce the opening of inlet 101, the adjusting nut 202 can be manually rotated to increase the length of the adjusting nut 202 screwed into the valve cover 30. At this time, the regulating valve core 201 will move closer to inlet 101 under the pushing action of the adjusting nut 202, thereby reducing the opening of inlet 101. When it is necessary to increase the opening of inlet 101, the adjusting nut 202 can be manually rotated in the opposite direction to shorten the length of the adjusting nut 202 screwed into the valve cover 30. At this time, the regulating valve core 201 will move away from inlet 101 under the elastic force of the adjusting spring 203, thereby increasing the opening of inlet 101.

[0048] In the illustrated embodiment, as Figure 4 As shown, the regulating valve core 201 includes a body portion 201a, an regulating rod portion 201b, and an regulating sleeve portion 201c. The body portion 201a is provided with an inclined sealing surface X, which can make sealing contact with the edge of the inlet 101. One end of the regulating rod portion 201b is connected to the body portion 201a, and the other end of the regulating rod portion 201b is fitted with the regulating sleeve portion 201c. An regulating spring 203 is fitted on the outer periphery of the regulating rod portion 201b, and one end of the regulating spring 203 abuts against the regulating sleeve portion 201c. The regulating sleeve portion 201c, the regulating rod portion 201b, and the body portion 201a can be configured as an integral structure or a separate assembly structure.

[0049] The illustrated embodiment, such as Figure 2 As shown, the adjusting assembly 20 includes a transmission rod 204, which passes through the central hole of the adjusting nut 202. One end of the transmission rod 204 is fixed to the adjusting valve core 201, and the other end is used to connect to the electric adjusting mechanism. In this way, the opening of the inlet 101 can be electrically adjusted. During electric adjustment, the electric adjusting mechanism drives the transmission rod 204 to move axially, thereby causing the adjusting valve core 201 to move towards or away from the inlet 101.

[0050] In the illustrated embodiment, as Figure 2 As shown, a sealing ring 205 is provided between the transmission rod 204 and the central hole of the adjusting nut 202 to ensure sealing. Two sealing rings 205 are shown in the figure. The inner side of the central hole of the adjusting nut 202 has two stepped surfaces 202a. Two pressure sleeves 206 are assembled inside the central hole of the adjusting nut 202. One end face of each pressure sleeve 206 abuts against the two stepped surfaces 202a. One pressure sleeve 206 and the adjusting nut 202 together form a sealing ring mounting groove, and the other pressure sleeve 206 and the adjusting nut 202 together form another sealing ring mounting groove. The two sealing rings 205 are respectively installed in the two sealing ring mounting grooves. The pressure sleeves 206 prevent the sealing rings 205 from dislodging from the port of the central hole of the adjusting nut 202.

[0051] In the illustrated embodiment, as Figure 2 As shown, the valve device also includes a first monitoring component 50 and a second monitoring component 60. The first monitoring component 50 and the second monitoring component 60 are respectively installed in two monitoring holes on the valve body 10. The first monitoring hole where the first monitoring component 50 is located is connected to the inlet 101 and can be used to monitor parameters such as pressure, flow rate, and temperature of the inlet 101. The second monitoring hole where the second monitoring component 60 is located is connected to the outlet 102 and can be used to monitor parameters such as pressure, flow rate, and temperature of the outlet 102.

[0052] In the illustrated embodiment, as Figure 1 As shown, a cover 70 is provided at the end of the valve cover 30 away from the valve body 10, and a through hole is provided in the center of the cover 70 for the adjusting nut 202 to pass through. The cover 70 is provided with a scale that can indicate the rotation angle or rotation position of the adjusting nut 202.

[0053] In summary, a core idea of ​​this application is to integrate both flow regulation and flow retention functions into a single valve device. Furthermore, the balancing valve core 402, which performs the flow retention function, is fitted outside the regulating valve core 201, which performs the flow regulation function, to reduce the size of the valve device. Furthermore, the pressure guiding channel C, which connects the high-pressure chamber A and the inlet 101, is located on the regulating valve core 201 to reduce the processing difficulty and cost of the pressure guiding channel C. Furthermore, the outflow channel D, which connects the inlet 101 and the outlet 102, is located between the balancing valve core 402 and the valve body 10 to avoid the need for machining channels and reduce processing costs.

[0054] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A valve device, characterized in that, The valve device includes a valve body (10) and an adjustment assembly (20) and a balancing assembly (40) installed on the valve body (10). The valve body (10) has an inlet (101) and an outlet (102). The adjustment assembly (20) includes an adjustment valve core (201) which can adjust the opening degree of the inlet (101). The balancing assembly (40) includes a diaphragm (401) and a balancing valve core (402) connected to the diaphragm (401). A high-pressure chamber (A) is formed on the side of the diaphragm (401) away from the inlet (101), and a low-pressure chamber (B) is formed on the side closer to the inlet (101). The low-pressure chamber (B) is connected to the outlet (102). The balance valve core (402) is connected to the side of the diaphragm (401) near the inlet (101). The balance valve core (402) is sleeved on the outer periphery of the regulating valve core (201). The regulating valve core (201) is provided with a pressure guiding channel (C), which connects the high pressure chamber (A) and the inlet (101). The balance valve core (402) is provided with a balance valve core cavity (E), which connects to the inlet (101). The end of the balance valve core (402) away from the diaphragm (401) forms an outflow channel (D) with the valve body (10). The outflow channel (D) connects the inlet (101) and the outlet (102).

2. The valve device according to claim 1, characterized in that, The valve body (10) is provided with a mounting port (103) for mounting the balancing assembly (40) and the regulating assembly (20). The valve device includes a valve cover (30) connected to the mounting port (103). The outer edge of the diaphragm (401) is clamped between the valve cover (30) and the valve body (10). The balancing assembly (40) includes a pressure ring (403) connected to the balancing valve core (402). The inner edge of the diaphragm (401) is clamped between the pressure ring (403) and the balancing valve core (402).

3. The valve device according to claim 2, characterized in that, The balance valve core (402) is provided with a pressing part (402a) and a threaded connection part (402b). The threaded connection part (402b) is located at the end of the pressing part (402a) away from the inlet (101). The pressure ring (403) is sleeved on the outer periphery of the threaded connection part (402b) and threadedly connected to the threaded connection part (402b). The inner edge of the diaphragm (401) is clamped between the pressure ring (403) and the pressing part (402a).

4. The valve device according to claim 3, characterized in that, The balancing valve core (402) includes an inner ring portion (402c), an outer ring portion (402d), and a balancing sleeve portion (402e). The inner ring portion (402c) is sleeved on the outer periphery of the regulating valve core (201). The outer ring portion (402d) is spaced around the outer periphery of the inner ring portion (402c). The pressing portion (402a) is disposed between the end of the outer ring portion (402d) away from the inlet (101) and the end of the inner ring portion (402c) away from the inlet (101). The balancing sleeve portion (402e) is disposed at the end of the outer ring portion (402d) close to the inlet (101). The outflow channel (D) is formed between the balancing sleeve portion (402e) and the valve body (10).

5. The valve device according to claim 4, characterized in that, The balancing assembly (40) includes a balancing spring (404) and a balancing spring seat (405). The balancing spring seat (405) is located at one end of the inner ring (402c) near the inlet (101). One end of the balancing spring (404) abuts against the pressing part (402a) and the other end is connected to the balancing spring seat (405). The balancing spring (404) can provide the balancing valve core (402) with an elastic force toward the high-pressure chamber (A).

6. The valve device according to claim 5, characterized in that, The balance spring seat (405) is spaced around the outer periphery of the regulating valve core (201). The end of the balance spring seat (405) away from the inner ring (402c) abuts against the valve body (10). The balance sleeve (402e) is spaced around the outer periphery of the balance spring seat (405). The balance spring seat (405) is provided with a flow passage, which connects the outlet channel (D) and the inlet (101).

7. The valve device according to any one of claims 1-6, characterized in that, The valve device includes a valve cover (30), and the adjusting assembly (20) includes an adjusting nut (202) and an adjusting spring (203). The adjusting nut (202) passes through the central through hole of the valve cover (30) and is threadedly connected to the valve cover (30). The end of the adjusting valve core (201) away from the inlet (101) abuts against the adjusting nut (202). The end of the adjusting spring (203) near the inlet (101) abuts against the valve cover (30), and the end of the adjusting spring (203) away from the inlet (101) abuts against the adjusting valve core (201). The adjusting spring (203) can give the adjusting valve core (201) an elastic force away from the inlet (101).

8. The valve device according to claim 7, characterized in that, The regulating valve core (201) includes a body part (201a), an regulating rod part (201b), and an regulating sleeve part (201c). The body part (201a) is provided with an inclined sealing surface (X) that can make sealing contact with the edge of the inlet (101). One end of the regulating rod part (201b) is connected to the body part (201a). The regulating sleeve part (201c) is sleeved on the outer periphery of the other end of the regulating rod part (201b). The regulating spring (203) is sleeved on the outer periphery of the regulating rod part (201b). The end of the regulating spring (203) away from the inlet (101) abuts against the regulating sleeve part (201c).

9. The valve device according to claim 7, characterized in that, The adjustment assembly (20) includes a transmission rod (204), which passes through the center hole of the adjustment nut (202). One end of the transmission rod (204) is fixed to the adjustment valve core (201), and the other end of the transmission rod (204) is used to connect to the electric adjustment mechanism.

10. The valve device according to claim 9, characterized in that, A sealing ring (205) is provided between the transmission rod (204) and the inner side of the center hole of the adjusting nut (202). A stepped surface (202a) is provided on the inner side of the center hole of the adjusting nut (202). A pressure sleeve (206) is assembled in the center hole of the adjusting nut (202). One end face of the pressure sleeve (206) abuts against the stepped surface (202a). The pressure sleeve (206) and the adjusting nut (202) together form a sealing ring mounting groove. The sealing ring (205) is installed in the sealing ring mounting groove.

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