Pressure balancing mechanism and pressure balancing valve

Abstract

This invention discloses a pressure balancing mechanism and a pressure balancing valve, including a fixed valve plate and a movable valve plate constituting a valve disc assembly, and a pressure-applying chamber disposed within the valve body. The movable valve plate is coaxially and rotatably mounted on the fixed valve plate. The invention also includes a fork and a pressure-applying channel. The movable valve plate is fixed to the end of the fork, and the fork drives the movable valve plate to rotate coaxially on the fixed valve plate. A pressure-applying plate is coaxially sleeved on the fork, and the end face of the pressure-applying plate forms a pressure-applying chamber with the valve body. The pressure-applying channel is formed within the fixed valve plate, the movable valve plate, and the fork. One end of the pressure-applying channel communicates with the flow channel of the valve body, and the other end passes through the fixed valve plate, the movable valve plate, and the fork before communicating with the pressure-applying chamber. This invention achieves pressure balance on both sides of the movable valve plate through an integrated pressure-applying channel, significantly reducing the valve opening and closing torque. Simultaneously, it eliminates the need for a large through-hole in the center of the valve plate, effectively ensuring the flow area of ​​the valve plate's flow channel and improving the valve's operational stability and economy.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a pressure balancing mechanism and a pressure balancing valve. Background Technology

[0002] In existing valves, after closing, the valve core assembly blocks the fluid within the valve body. Therefore, the valve core assembly will bear the pressure difference of the fluid. The stronger the fluid pressure, the stronger the pressure difference that the valve core assembly will bear. Most existing valve core assemblies use a combination of two parts, one moving and one stationary, to achieve opening and closing. The valve stem is fixed to the moving part, driving the moving part to move on the stationary part, thereby achieving opening and closing. As a result, the pressure difference mentioned above will affect the friction between the moving and stationary parts, which can easily lead to the problem that the moving part requires a large torque to drive it during valve opening.

[0003] Based on the above problems, the applicant provided a corresponding solution to the pressure imbalance problem in 2025, with the announcement number CN223511533U, entitled "A Pressure Balancing Fluid Control Valve". This solution achieves pressure balance between the moving valve plate and the fixed valve plate by setting a pressure chamber, a piston, and a conduction channel, thereby solving the above problems. However, in this method, the drive valve rod (i.e., the fork) used to drive the moving valve plate needs to pass through the fixed valve plate. This requires opening a large through hole at the center of the fixed valve plate and the moving valve plate, which will significantly reduce the effective flow area of ​​the flow channels of the fixed valve plate and the moving valve plate. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a pressure balancing mechanism and a pressure balancing valve that uses only a pressure-feeding channel to pass through the moving valve plate and the fixed valve plate. Compared with the existing technology that uses a driving valve stem to pass through, this effectively ensures the flow area of ​​the flow channels of the fixed valve plate and the moving valve plate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressure balancing mechanism, comprising a fixed valve plate and a movable valve plate constituting a valve disc assembly, and a pressure chamber disposed within the valve body. The movable valve plate is coaxially and rotatably disposed on the fixed valve plate. The mechanism also includes a fork and a pressure-inducing channel. The movable valve plate is fixed to the end of the fork, and the fork drives the movable valve plate to rotate coaxially on the fixed valve plate. A pressure-inducing plate is coaxially sleeved on the fork, and the end face of the pressure-inducing plate forms a pressure chamber with the valve body. The pressure-inducing channel is opened within the fixed valve plate, the movable valve plate, and the fork. One end of the pressure-inducing channel communicates with the flow channel of the valve body, and the other end passes through the fixed valve plate, the movable valve plate, and the fork and communicates with the pressure chamber.

[0006] As a further improvement of the present invention, the circular periphery of the moving valve plate is provided with a number of slots, and the end of the shift fork is provided with a number of locking feet. The locking feet are embedded in the slots to connect the moving valve plate to the end of the shift fork.

[0007] As a further improvement of the present invention, pressure-inducing holes are provided at the center of both the fixed valve plate and the moving valve plate, and the two pressure-inducing holes are interconnected as part of the pressure-inducing channel.

[0008] As a further improvement of the present invention, the end of the moving valve plate facing the fixed valve plate is provided with a pressure groove, and the pressure groove is connected to the pressure hole.

[0009] As a further improvement of the present invention, the fixed valve plate has at least one through hole and at least one blind hole, and the moving valve plate has at least one conducting channel and at least one closed channel. The valve disc assembly is opened or closed by the cooperation between the conducting channel and the closed channel and the through hole and the blind hole.

[0010] As a further improvement of the present invention, the closed channel is a combination of a blind hole structure opened on the moving valve plate or a through hole opened on the moving valve plate and a closed cavity provided on the shift fork.

[0011] As a further improvement of the present invention, a pressure-guiding groove is provided at one end of the moving valve plate facing the fixed valve plate. When the closed channel is a blind hole structure opened on the moving valve plate, one end of the pressure-guiding groove is connected to the blind hole, and the other end of the pressure-guiding groove is connected to the pressure-guiding hole. When the closed channel is a combination of a through hole opened on the moving valve plate and a closed cavity provided on the shift fork, one end of the pressure-guiding groove is connected to the closed cavity, and the other end of the pressure-guiding groove is connected to the pressure-guiding hole.

[0012] As a further improvement of the present invention, the blind hole on the fixed valve plate is either a blind hole structure opened on the fixed valve plate or a combination of a through hole opened on the fixed valve plate and a closed cavity provided in the valve body.

[0013] As a further improvement of the present invention, the fixed valve plate is provided with a first through hole and a first blind hole, and the movable valve plate is provided with a first conducting channel and a first closing channel. The fixed valve plate and the movable valve plate have the following matching relationship: the first conducting channel and the first blind hole completely coincide, and the first closing channel and the first through hole completely coincide; or the first conducting channel and the first through hole completely coincide, and the first closing channel and the first blind hole completely coincide; or the first conducting channel and the first through hole partially coincide, and the first closing channel and the first blind hole partially coincide.

[0014] As a further improvement of the present invention, the first through hole and the first blind hole divide the end face of the fixed valve plate into two equal parts, each occupying one equal part; the first conducting channel and the first closed channel divide the end face of the moving valve plate into two equal parts, each occupying one equal part.

[0015] As a further improvement of the present invention, the fixed valve plate is provided with a first through hole, a second through hole, a first blind hole, and a second blind hole, and the movable valve plate is provided with a first conducting channel, a second conducting channel, a first closed channel, and a second closed channel. The fixed valve plate and the movable valve plate have the following matching relationship: the first conducting channel and the first blind hole completely coincide, the second conducting channel and the second blind hole completely coincide, the first closed channel and the first through hole completely coincide, and the second closed channel and the second through hole completely coincide; or the first conducting channel and the first through hole completely coincide, the second conducting channel and the second through hole completely coincide, the first closed channel and the second blind hole completely coincide, and the second closed channel and the first blind hole completely coincide; or the first conducting channel and the first through hole partially coincide, the second conducting channel and the second through hole partially coincide, the first closed channel and the second blind hole partially coincide, and the second closed channel and the first blind hole partially coincide.

[0016] As a further improvement of the present invention, the first through hole, the second through hole, the first blind hole, and the second blind hole are arranged alternately and evenly along the circumference of the fixed valve plate, dividing the end face of the fixed valve plate into four equal parts, and each through hole and each blind hole occupies one equal part; the first conducting channel, the second conducting channel, the first closed channel, and the second closed channel are arranged alternately and evenly along the circumference of the moving valve plate, dividing the end face of the moving valve plate into four equal parts, and each conducting channel and each closed channel occupies one equal part.

[0017] As a further improvement of the present invention, the fixed valve plate is provided with a first through hole, a second through hole, a third through hole, and a first blind hole, a second blind hole, and a third blind hole; the movable valve plate is provided with a first conducting channel, a second conducting channel, a third conducting channel, and a first closed channel, a second closed channel, and a third closed channel. The fixed valve plate and the movable valve plate have the following matching relationship: the first conducting channel completely coincides with the first blind hole, the second conducting channel completely coincides with the second blind hole, the third conducting channel completely coincides with the third blind hole, the first closed channel completely coincides with the second through hole, the second closed channel completely coincides with the third through hole, and the third closed channel completely coincides with the first through hole. The holes completely overlap; or the first conductive channel completely overlaps with the second through hole, the second conductive channel completely overlaps with the third through hole, the third conductive channel completely overlaps with the first through hole, the first closed channel completely overlaps with the second blind hole, the second closed channel completely overlaps with the third blind hole, and the third closed channel completely overlaps with the first blind hole; or the first conductive channel partially overlaps with the second through hole, the second conductive channel partially overlaps with the third through hole, the third conductive channel partially overlaps with the first through hole, the first closed channel partially overlaps with the second blind hole, the second closed channel partially overlaps with the third blind hole, and the third closed channel partially overlaps with the first blind hole.

[0018] As a further improvement of the present invention, the first through hole, the second through hole, the third through hole, and the first blind hole, the second blind hole, and the third blind hole are arranged alternately and evenly along the circumference of the fixed valve plate, dividing the end face of the fixed valve plate into six equal parts, and each through hole and each blind hole occupies one equal part; the first conducting channel, the second conducting channel, the third conducting channel, and the first closed channel, the second closed channel, and the third closed channel are arranged alternately and evenly along the circumference of the moving valve plate, dividing the end face of the moving valve plate into six equal parts, and each conducting channel and each closed channel occupies one equal part.

[0019] Another aspect of the present invention provides a pressure balancing valve, including a valve body and an actuator. The valve body is provided with an inlet and an outlet, and also includes the pressure balancing mechanism described in any one of the above. The actuator is connected to a shift fork and drives the shift fork to rotate the moving valve plate. The fixed valve plate and the moving valve plate are disposed in the valve body between the inlet and the outlet. The moving valve plate is disposed relative to the outlet, and the fixed valve plate is disposed relative to the inlet.

[0020] Another aspect of the present invention provides a pressure balancing valve, including a valve body and an actuator. The valve body is provided with an inlet and an outlet, and also includes the pressure balancing mechanism described in any one of the above. The actuator is connected to a shift fork and drives the shift fork to rotate the moving valve plate. The fixed valve plate and the moving valve plate are disposed in the valve body between the inlet and the outlet. The moving valve plate is disposed relative to the inlet, and the fixed valve plate is disposed relative to the outlet.

[0021] The beneficial effects of this invention are that by integrating pressure-inducing channels within the fixed valve plate, moving valve plate, and shift fork, the medium pressure within the valve body flow channel can be directly introduced into the pressure-applying chamber. This creates a pressure balance between the side of the moving valve plate facing the pressure-applying chamber and the side facing the fixed valve plate, completely eliminating the pressing effect of the medium pressure difference on the moving valve plate. This significantly reduces the frictional resistance between the moving valve plate and the fixed valve plate during rotation, thereby significantly reducing the driving torque required for valve opening and closing and opening degree adjustment. It can be adapted to smaller actuators, reducing the overall cost of the valve.

[0022] The pressure channel is integrated inside the valve plate and the shift fork. The shift fork does not need to pass through the fixed valve plate. Only a small pressure hole needs to be opened in the center of the valve plate. There is no need to open a large through hole for the shift fork to pass through at the center of the valve plate. The valve plate of the same diameter has a larger effective flow area, which fundamentally solves the problem of affecting the effective flow area of ​​the valve plate in the existing solution and effectively improves the economic efficiency of the product.

[0023] The transmission is achieved by directly engaging the end of the shift fork with the outer circumference of the moving valve plate. The transmission structure is simple and compact, with strong stability and no redundant transmission links, resulting in high transmission efficiency. At the same time, it can effectively ensure the control accuracy of the rotation angle of the moving valve plate and improve the flow regulation performance of the valve.

[0024] The embedded engagement of the slot and the foot further enhances the transmission stability of the shift fork and the moving valve plate, preventing slippage and misalignment during rotation. The cooperation between the central pressure hole and the pressure groove ensures that the pressure channel remains unobstructed at any rotation angle, resulting in stable and unfluctuating pressure transmission. With valve plate flow channel structures in multiple specifications such as bi-section, quadri-section, and hexa-section, it can adapt to valve application scenarios with different pipe diameters and different adjustment accuracy requirements, making it widely applicable. At the same time, it can achieve stable operation under all working conditions, including fully open, fully closed, and linear opening adjustment of the valve. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the pressure balancing valve in the closed state of Example 1; Figure 2 This is a schematic diagram of the internal structure of the pressure balancing valve in the open state of Example 1; Figure 3 This is a schematic diagram of the valve body structure with a closed cavity in Example 1; Figure 4 This is a schematic diagram of the structure of the fixed valve plate in Example 1; Figure 5 This is a schematic diagram of the combination of the shift fork and the moving valve plate in Example 1; Figure 6 for Figure 5 Schematic diagram of the middle shift fork; Figure 7 for Figure 5 Schematic diagram of the structure of the intermediate-moving valve plate; Figure 8 This is a schematic diagram of the internal structure of the pressure balancing valve in the closed state in Example 2; Figure 9 This is a schematic diagram of the internal structure of the pressure balancing valve in the open state of Example 2; Figure 10 This is a schematic diagram of the internal structure of the pressure balancing valve in the closed state of Example 3; Figure 11 This is a schematic diagram of the internal structure of the pressure balancing valve in the open state of Example 3; Figure 12 This is a schematic diagram of the valve body structure without a closed cavity in Example 3; Figure 13 This is a schematic diagram of the fixed valve plate structure in Example 3; Figure 14 This is a schematic diagram of the structure of the fixed valve plate and the moving valve plate in Examples 1, 2 and 3 when they are divided into two equal parts; Figure 15Figure a shows the cooperation relationship between the fixed valve plate and the moving valve plate in the closed position when the system is divided into two equal parts; Figure b shows the cooperation relationship between the fixed valve plate and the moving valve plate in the open position when the system is divided into two equal parts; Figure c shows the cooperation relationship between the fixed valve plate and the moving valve plate in the opening adjustment position when the system is divided into two equal parts. Figure 16 This is a schematic diagram of the structure of the fixed valve plate and the moving valve plate when they are divided into four equal parts, as shown in Examples 1, 2 and 3. Figure 17 Figure a shows the cooperation relationship between the fixed valve plate and the moving valve plate in the closed position when the four sections are divided into four equal parts; Figure b shows the cooperation relationship between the fixed valve plate and the moving valve plate in the open position when the four sections are divided into four equal parts; Figure c shows the cooperation relationship between the fixed valve plate and the moving valve plate in the opening adjustment position when the four sections are divided into four equal parts. Figure 18 This is a schematic diagram of the structure of the fixed valve plate and the moving valve plate when they are divided into six equal parts, as shown in Examples 1, 2 and 3. Figure 19 Figure a shows the cooperation relationship between the fixed valve plate and the moving valve plate in the closing position when the area is divided into six equal parts; figure b shows the cooperation relationship between the fixed valve plate and the moving valve plate in the opening position when the area is divided into six equal parts; figure c shows the cooperation relationship between the fixed valve plate and the moving valve plate in the adjusting opening position when the area is divided into six equal parts. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0027] Example 1 Reference Figure 1-7 , Figure 14-19 As shown, the pressure balancing mechanism of this embodiment includes a fixed valve plate 1 and a movable valve plate 2 constituting a valve disc assembly, and a pressure chamber 4 disposed within a valve body 3. The movable valve plate 2 is coaxially and rotatably disposed on the fixed valve plate 1. It also includes a fork 5 and a pressure channel 6. The movable valve plate 2 is fixed to the end of the fork 5, and the fork 5 drives the movable valve plate 2 to rotate coaxially on the fixed valve plate 1. The pressure channel 6 is formed within the fixed valve plate 1, the movable valve plate 2, and the fork 5. One end of the pressure channel 6 communicates with the flow channel of the valve body 3, and the other end passes through the fixed valve plate 1, the movable valve plate 2, and the fork 5 to communicate with the pressure chamber 4. In this embodiment, the pressure chamber 4 is formed by combining a pressure plate 53 sleeved on the fork 5 with a channel for rotation of the fork 5 within the valve body 3. A sealing ring is sleeved on the outer wall of the pressure plate 53, forming a chamber between the upper surface of the pressure plate 53 and the valve body 3, which serves as the pressure chamber 4. Figure 2 As shown, a through hole 54 is provided on the outer side wall of the shift fork 5 above the pressure plate 53, which is connected to the pressure channel 6, so as to achieve the effect of applying pressure to the end face of the pressure plate 53.

[0028] In this embodiment, the circumference of the movable valve plate 2 is provided with several slots 21, and the end of the shift fork 5 is provided with several locking feet 51. The locking feet 51 are embedded in the slots 21 to connect the movable valve plate 2 to the end of the shift fork 5. Through the embedded cooperation between the locking feet 51 and the slots 21, the circumferential positioning of the shift fork 5 and the movable valve plate 2 is achieved. When the shift fork 5 rotates, it can stably drive the movable valve plate 2 to rotate synchronously, avoiding slippage and misalignment during transmission, and improving the accuracy of valve opening control.

[0029] Both the stationary valve plate 1 and the moving valve plate 2 have pressure-sensing holes 7 at their centers, and the two pressure-sensing holes 7 are interconnected as part of the pressure-sensing channel 6. The coaxial pressure-sensing holes 7 at the center of the valve plates ensure that the two pressure-sensing holes 7 remain coaxially connected at any rotation angle of the moving valve plate 2, thus guaranteeing the continuous unobstructed flow of the pressure-sensing channel 6 and preventing pressure interruption or fluctuations during the rotation of the moving valve plate 2, thereby ensuring the stability of the pressure balance effect.

[0030] The fixed valve plate 1 has at least one through hole and at least one blind hole, while the movable valve plate 2 has at least one conducting channel and at least one closed channel. The valve assembly is opened or closed by the cooperation between the conducting channel and the closed channel and the through hole and the blind hole. The flow channel is opened by the cooperation between the through hole and the conducting channel, and the flow channel is cut off by the cooperation between the through hole and the closed channel and the blind hole and the conducting channel. The structure is simple, the cooperation accuracy is high, and the opening and closing of the flow channel and the degree of opening can be precisely controlled by the rotation of the movable valve plate 2.

[0031] The closed channel is either a blind hole structure formed on the moving valve plate 2 or a through hole formed on the moving valve plate 2 combined with a closed cavity 52 on the shift fork 5. These two structural forms of the closed channel can adapt to different valve processing techniques and assembly requirements. The blind hole structure can be directly machined integrally on the moving valve plate 2, resulting in a compact structure. The combination of the through hole and the closed cavity 52 reduces the pressure on the moving valve plate 2 and also reduces the processing difficulty of the moving valve plate 2. Meanwhile, the closed cavity 52 of the shift fork 5 achieves a reliable seal, ensuring a sealing effect.

[0032] The moving valve plate 2 has a pressure-applying groove 8 at one end facing the fixed valve plate 1. When the closed channel is composed of a through hole on the moving valve plate 2 and a closed cavity 52 on the shift fork 5, one end of the pressure-applying groove 8 is connected to the closed cavity 52, and the other end of the pressure-applying groove 8 is connected to the pressure-applying hole 7. By connecting the closed cavity 52 and the pressure-applying hole 7 through the pressure-applying groove 8, the pressure of the medium in the closed cavity 52 can be kept consistent with the pressure of the pressure-applying channel 6, avoiding pressure accumulation in the closed cavity 52, further ensuring the pressure balance of the moving valve plate 2, and at the same time preventing pressure fluctuations in the closed channel from affecting the sealing performance of the valve.

[0033] The blind hole on the fixed valve plate 1 is formed by combining a through hole on the fixed valve plate 1 and a closed cavity 31 in the valve body 3. The structure of combining the through hole and the closed cavity 31 in the valve body 3 can reduce the pressure on the fixed valve plate 1, and at the same time reduce the thickness and cost of the fixed valve plate 1. Meanwhile, the closed cavity 31 in the valve body 3 achieves a reliable sealing effect, which is suitable for the application scenarios of large-diameter valves.

[0034] In this embodiment 1, refer to Figure 14 , Figure 15 As shown, the fixed valve plate 1 has a first through hole 101 and a first blind hole 111, and the movable valve plate 2 has a first conducting channel 201 and a first closing channel 211. The fixed valve plate 1 and the movable valve plate 2 have the following matching relationships: the first conducting channel 201 completely overlaps with the first blind hole 111, and the first closing channel 211 completely overlaps with the first through hole 101; or the first conducting channel 201 completely overlaps with the first through hole 101, and the first closing channel 211 completely overlaps with the first blind hole 111; or the first conducting channel 201 partially overlaps with the first through hole 101, and the first closing channel 211 partially overlaps with the first blind hole 111. Through the cooperation of the two sets of channels, three working states of the valve can be realized: fully closed state, fully open state, and opening adjustment state, which can realize precise control of the medium flow and adapt to the dual needs of on / off type and regulating type valves.

[0035] The first through hole 101 and the first blind hole 111 divide the end face of the fixed valve plate 1 into two equal parts, each occupying one part. The first conducting channel 201 and the first closed channel 211 divide the end face of the moving valve plate 2 into two equal parts, each occupying one part. This bi-divided flow channel structure allows the moving valve plate 2 to switch between fully open and fully closed by rotating 180 degrees. It features fast opening and closing speed, a large flow channel area, and is suitable for applications requiring high flow rates and fast opening and closing.

[0036] As an optional implementation method, refer to Figure 16 , Figure 17As shown, the fixed valve plate 1 is provided with a first through hole 101, a second through hole 102, a first blind hole 111, and a second blind hole 112. The movable valve plate 2 is provided with a first conducting channel 201, a second conducting channel 202, a first closing channel 211, and a second closing channel 212. The fixed valve plate 1 and the movable valve plate 2 have the following matching relationship: the first conducting channel 201 completely coincides with the first blind hole 111, the second conducting channel 202 completely coincides with the second blind hole 112, the first closing channel 211 completely coincides with the first through hole 101, and the second closing channel 212 completely coincides with the second through hole 102. The first through-hole 101 and the second through-hole 102 are completely overlapped; or the first through-hole 201 and the second through-hole 102 are completely overlapped, the first closed through-hole 211 and the second blind hole 112 are completely overlapped, and the second closed through-hole 212 and the first blind hole 111 are completely overlapped; or the first through-hole 201 and the first through-hole 101 are partially overlapped, the second through-hole 202 and the second through-hole 102 are partially overlapped, the first closed through-hole 211 and the second blind hole 112 are partially overlapped, and the second closed through-hole 212 and the first blind hole 111 are partially overlapped. The four-part flow channel structure, through the synchronous coordination of multiple sets of channels, can improve the valve's flow capacity, while making the force on the moving valve plate 2 more uniform during rotation, further reducing the rotational torque and improving the stability of valve operation.

[0037] The first through hole 101, the second through hole 102, and the first blind hole 111 and the second blind hole 112 are alternately and evenly arranged along the circumference of the fixed valve plate 1, dividing the end face of the fixed valve plate 1 into four equal parts, with each through hole and each blind hole occupying one equal part. The first conducting channel 201, the second conducting channel 202, and the first closed channel 211 and the second closed channel 212 are alternately and evenly arranged along the circumference of the moving valve plate 2, dividing the end face of the moving valve plate 2 into four equal parts, with each conducting channel and each closed channel occupying one equal part. This alternating and evenly arranged structure ensures that the moving valve plate 2 is subjected to uniform circumferential force at any rotation angle, avoiding valve plate wear caused by uneven load, and further improving the service life and sealing performance of the valve plate.

[0038] As an optional implementation method, refer to Figure 16 , Figure 17As shown, the fixed valve plate 1 is provided with a first through hole 101, a second through hole 102, a third through hole 103 and a first blind hole 111, a second blind hole 112, and a third blind hole 113. The movable valve plate 2 is provided with a first conducting channel 201, a second conducting channel 202, a third conducting channel 203 and a first closing channel 211, a second closing channel 212, and a third closing channel 213. The fixed valve plate 1 and the movable valve plate 2 have the following matching relationship: the first conducting channel 201 completely coincides with the first blind hole 111, the second conducting channel 202 completely coincides with the second blind hole 112, the third conducting channel 203 completely coincides with the third blind hole 113, the first closing channel 211 completely coincides with the second through hole 102, the second closing channel 212 completely coincides with the third through hole 103, and the third closing channel 213 completely coincides with the first through hole 101. The following conditions may be met: 1. Full overlap; or 2. Complete overlap between the first conductive channel 201 and the second through hole 102, 3. Complete overlap between the second conductive channel 202 and the third through hole 103, 4. Complete overlap between the third conductive channel 203 and the first through hole 101, 5. Complete overlap between the first closed channel 211 and the second blind hole 112, 6. Complete overlap between the second closed channel 212 and the third blind hole 113, 7. Complete overlap between the third closed channel 213 and the first blind hole 111; or 2. Partial overlap between the first conductive channel 201 and the second through hole 102, 7. Partial overlap between the second conductive channel 202 and the third through hole 103, 8. Partial overlap between the third conductive channel 203 and the first through hole 101, 9. Partial overlap between the first closed channel 211 and the second blind hole 112, 10. Partial overlap between the second closed channel 212 and the third blind hole 113, 10. Partial overlap between the third closed channel 213 and the first blind hole 111. The six-part flow channel structure enables linear and precise adjustment of valve flow, making it suitable for valve applications requiring high-precision flow control. Meanwhile, the uniform arrangement of multiple channels further enhances the uniformity of force on the valve plate and its operational stability.

[0039] The first through hole 101, the second through hole 102, the third through hole 103, and the first blind hole 111, the second blind hole 112, and the third blind hole 113 are alternately and evenly arranged along the circumference of the fixed valve plate 1, dividing the end face of the fixed valve plate 1 into six equal parts, with each through hole and each blind hole occupying one equal part. The first conducting channel 201, the second conducting channel 202, the third conducting channel 203, and the first closed channel 211, the second closed channel 212, and the third closed channel 213 are alternately and evenly arranged along the circumference of the moving valve plate 2, dividing the end face of the moving valve plate 2 into six equal parts, with each conducting channel and each closed channel occupying one equal part. The alternating and evenly arranged six-part structure ensures that the flow rate changes linearly with the rotation angle during the rotation of the moving valve plate 2, resulting in high adjustment accuracy. At the same time, the circumferential force on the valve plate is always uniform, eliminating the risk of off-center load, and adapting to the requirements of high-pressure and high-precision regulation.

[0040] This embodiment 1 also provides a pressure balancing valve, as shown in the following figure. Figure 1 , Figure 2As shown, the device includes a valve body 3 and an actuator. The valve body 3 has an inlet and an outlet, and also includes the pressure balancing mechanism described in this embodiment. The actuator is connected to a fork 5, which drives the fork 5 to rotate the movable valve plate 2. The fixed valve plate 1 and the movable valve plate 2 are positioned inside the valve body 3 between the inlet and outlet, with the movable valve plate 2 positioned relative to the outlet and the fixed valve plate 1 positioned relative to the inlet. In this installation method, the medium at the inlet first flows through the fixed valve plate 1 and then through the movable valve plate 2 to the outlet. The pressure channel 6 directly introduces the medium pressure from the inlet side to the pressure chamber 4, resulting in a fast pressure response and excellent pressure balancing effect, suitable for valves installed in the forward direction.

[0041] Based on the above structure, Example 1 has the following pressure balance principle. Reference Figures 3 to 7 As shown, when the valve is closed: the first through channel 201 of the moving valve plate 2 overlaps with the first blind hole 111 formed by the combination of the through hole on the fixed valve plate 1 and the closed cavity 31 of the valve body 3; the first closed channel 211 formed by the combination of the through hole of the moving valve plate 2 and the closed cavity 52 of the fork 5 overlaps with the first through hole 101 of the fixed valve plate 1. The moving valve plate 2 and the fork 5 cooperate with the fixed valve plate 1 and the valve body 3 to isolate the inlet and outlet. At this time, the valve assembly is subjected to water pressure as follows: water inlet—first through hole 101 of the fixed valve plate 1—first closed channel 211 of the moving valve plate 2—closed cavity 52 of the fork 5—forming an upward water pressure projection area S2; another water path passes through the pressure inlet hole of the valve body 3—pressure inlet hole 7 of the fixed valve plate 1—pressure inlet hole 7 of the moving valve plate 2—pressure inlet channel 6 of the fork 5—pressure outlet hole—pressure application cavity 4 above the sealing groove of the fork 5—forming a downward water pressure projection area S4. According to design requirements, the areas of S2 and S4 are basically equal, the forces on the valve disc assembly are basically balanced, and a lower rotational torque of the valve disc assembly is achieved.

[0042] When the valve is open: the first conducting channel 201 of the moving valve plate 2 overlaps with the first through hole 101 of the fixed valve plate 1; the first closed channel 211 formed by the combination of the through hole of the moving valve plate 2 and the closed cavity 52 of the fork 5 overlaps with the first blind hole 111 formed by the combination of the through hole on the fixed valve plate 1 and the closed cavity 31 of the valve body 3. The moving valve plate 2 and the fork 5 cooperate with the fixed valve plate 1 and the valve body 3 to connect the inlet and outlet. At this time, the valve assembly is subjected to water pressure as follows: through the pressure hole of the valve body 3—pressure hole 7 of the fixed valve plate 1—pressure hole 7 of the moving valve plate 2—pressure groove 8 of the moving valve plate 2—first closed channel 211 of the moving valve plate 2—closed cavity 52 of the fork 5—forming an upward projected area S2 of water pressure; another path of water continues through the pressure hole 7 of the moving valve plate 2—pressure channel 6 of the fork 5—pressure outlet—pressure chamber 4 above the sealing groove of the fork 5—forming a downward projected area S4 of water pressure. After the water inlet is connected to the outlet, the water pressure acts on the fork 5 to form upward and downward projected areas S1 and S3 respectively. According to the design requirements, the areas of S2 and S4 are basically equal, and the areas of S1 and S3 are basically equal. The valve disc assembly is basically balanced by the force, so as to achieve a low rotational torque of the valve disc assembly.

[0043] Example 2 Reference Figure 8-9 , Figure 14-19 As shown, the mechanical structure of the pressure balancing mechanism in this embodiment is exactly the same as that in Embodiment 1. This embodiment provides a pressure balancing valve, including a valve body 3 and an actuator. The valve body 3 is provided with an inlet and an outlet, and also includes the pressure balancing mechanism described in Embodiment 1. The actuator is connected to a fork 5, driving the fork 5 to rotate the moving valve plate 2. The fixed valve plate 1 and the moving valve plate 2 are arranged inside the valve body 3 between the inlet and the outlet. The difference from Embodiment 1 is that in this embodiment, the inlet and outlet of the valve body 3 are interchanged, the moving valve plate 2 is arranged relative to the inlet, and the fixed valve plate 1 is arranged relative to the outlet. Under this installation method, the medium at the inlet first passes through the moving valve plate 2, and then flows to the outlet through the fixed valve plate 1. It can adapt to the valve operating conditions of reverse installation, without adjusting the structure of the pressure balancing mechanism, only the installation direction of the valve plates needs to be changed, which has a wider range of applications and higher assembly flexibility.

[0044] Based on the above structure, Example 2 has the following pressure balance principle. When the valve is closed: the first conducting channel 201 of the moving valve plate 2 overlaps with the first blind hole 111 formed by the combination of the through hole on the fixed valve plate 1 and the closed cavity 31 of the valve body 3; the first closed channel 211 formed by the combination of the through hole of the moving valve plate 2 and the closed cavity 52 of the fork 5 overlaps with the first through hole 101 of the fixed valve plate 1. The moving valve plate 2 and the fork 5 cooperate with the fixed valve plate 1 and the valve body 3 to isolate the inlet and outlet. At this time, the valve disc assembly is subjected to water pressure: water inlet – the water pressure acts on the fork 5 to form upward and downward projected areas S1 and S3 respectively. According to design requirements, the areas of S1 and S3 are basically equal, the valve disc assembly is basically balanced by force, and a low rotational torque of the valve disc assembly is achieved.

[0045] When the valve is open: the first closed channel 211 formed by the combination of the through hole of the moving valve plate 2 and the closed cavity 52 of the fork 5 overlaps with the first blind hole 111 formed by the combination of the through hole on the fixed valve plate 1 and the closed cavity 31 of the valve body 3. The moving valve plate 2 and the fork 5 cooperate with the fixed valve plate 1 and the valve body 3 to connect the inlet and outlet. At this time, the valve assembly is subjected to water pressure: water inlet—the water pressure acts on the fork 5 to form upward and downward projected areas S1 and S3 respectively. After the inlet connects to the outlet, the water pressure passes through the pressure hole of the valve body 3—pressure hole 7 of the fixed valve plate 1—pressure hole 7 of the moving valve plate 2—pressure groove 8 of the moving valve plate 2—first closed channel 211 of the moving valve plate 2—closed cavity 52 of the fork 5—forming an upward projected area S2; another stream of water continues to pass through the pressure hole 7 of the moving valve plate 2—pressure channel 6 of the fork 5—pressure outlet—pressure chamber 4 above the sealing groove of the fork 5—forming a downward projected area S4. According to design requirements, the areas of S2 and S4 are basically equal, and the areas of S1 and S3 are basically equal. The valve disc assembly is basically balanced under force, achieving a lower rotational torque of the valve disc assembly.

[0046] Example 3 Reference Figure 10-13 , Figure 14-19 As shown, the pressure balancing mechanism of this embodiment includes a fixed valve plate 1 and a movable valve plate 2 constituting a valve disc assembly, and a pressure chamber 4 disposed within a valve body 3. The movable valve plate 2 is coaxially and rotatably disposed on the fixed valve plate 1. It also includes a fork 5 and a pressure channel 6. The movable valve plate 2 is fixed to the end of the fork 5, and the fork 5 drives the movable valve plate 2 to rotate coaxially on the fixed valve plate 1. The pressure channel 6 is opened within the fixed valve plate 1, the movable valve plate 2, and the fork 5. One end of the pressure channel 6 communicates with the flow channel of the valve body 3, and the other end passes through the fixed valve plate 1, the movable valve plate 2, and the fork 5 and communicates with the pressure chamber 4.

[0047] The core difference between this embodiment 3 and embodiment 1 is that the blind hole on the fixed valve plate 1 is a blind hole structure directly opened on the fixed valve plate 1, and the valve body 3 does not have a closed cavity 31. The structure is simpler, the processing difficulty is lower, and it is suitable for the standardized production needs of small and medium diameter valves.

[0048] In this embodiment 3, the circumference of the moving valve plate 2 is provided with several slots 21, and the end of the shift fork 5 is provided with several locking feet 51. The locking feet 51 are embedded in the slots 21 to connect the moving valve plate 2 to the end of the shift fork 5. Pressure holes 7 are provided at the center of both the fixed valve plate 1 and the moving valve plate 2. The two pressure holes 7 are interconnected and communicate with the pressure channel 6. A pressure groove 8 is provided at the end of the moving valve plate 2 facing the fixed valve plate 1, and the pressure groove 8 communicates with the pressure hole 7.

[0049] The fixed valve plate 1 has at least one through hole and at least one blind hole, and the movable valve plate 2 has at least one conducting channel and at least one closed channel. The valve assembly is opened or closed by the cooperation between the conducting channel and the closed channel and the through hole and the blind hole. The closed channel is a blind hole structure opened on the movable valve plate 2 or a combination of a through hole opened on the movable valve plate 2 and a closed cavity 52 provided on the shift fork 5. The movable valve plate 2 has a pressure groove 8 at one end facing the fixed valve plate 1. When the closed channel is a combination of a through hole opened on the movable valve plate 2 and a closed cavity 52 provided on the shift fork 5, one end of the pressure groove 8 is connected to the closed cavity 52, and the other end of the pressure groove 8 is connected to the pressure hole 7.

[0050] In this embodiment 3, the fixed valve plate 1 is provided with a first through hole 101 and a first blind hole 111, and the movable valve plate 2 is provided with a first conducting channel 201 and a first closing channel 211. The fixed valve plate 1 and the movable valve plate 2 have the following matching relationship: the first conducting channel 201 and the first blind hole 111 completely overlap, and the first closing channel 211 and the first through hole 101 completely overlap; or the first conducting channel 201 and the first through hole 101 completely overlap, and the first closing channel 211 and the first blind hole 111 completely overlap; or the first conducting channel 201 and the first through hole 101 partially overlap, and the first closing channel 211 and the first blind hole 111 partially overlap.

[0051] As an optional implementation, the fixed valve plate 1 can adopt a flow channel structure of four or six equal divisions, which corresponds to the moving valve plate 2 and is adapted to the same equal division specifications of the conducting channel and the closed channel. The structural matching relationship is the same as that of Example 1, and it can be adapted to different flow regulation requirements.

[0052] This embodiment 3 also provides a pressure balancing valve, including a valve body 3 and an actuator. The valve body 3 is provided with an inlet and an outlet, and also includes the pressure balancing mechanism described in this embodiment 1. The actuator is connected to a fork 5 and drives the fork 5 to rotate the moving valve plate 2. The fixed valve plate 1 and the moving valve plate 2 are arranged in the valve body 3 at a position between the inlet and the outlet. The moving valve plate 2 is arranged relative to the inlet, and the fixed valve plate 1 is arranged relative to the outlet.

[0053] Based on the above structure, Example 3 has the following pressure balance principle. When the valve is closed: the first conducting channel 201 of the moving valve plate 2 overlaps with the first blind hole 111 of the fixed valve plate 1, and the first closed channel 211 formed by the combination of the through hole of the moving valve plate 2 and the closed cavity 52 of the fork 5 overlaps with the first through hole 101 of the fixed valve plate 1. The moving valve plate 2 and the fork 5 cooperate with the fixed valve plate 1 to isolate the inlet and outlet. At this time, the valve disc assembly is subjected to water pressure: water inlet – the water pressure acts on the fork 5 to form upward and downward projected areas S1 and S3 respectively. According to design requirements, the areas of S1 and S3 are basically equal, the valve disc assembly is basically balanced by force, and a low rotational torque of the valve disc assembly is achieved.

[0054] When the valve is open: the first conducting channel 201 of the moving valve plate 2 overlaps with the first through hole 101 of the fixed valve plate 1, and the first closed channel 211 formed by the combination of the through hole of the moving valve plate 2 and the closed cavity 52 of the fork 5 overlaps with the first blind hole 111 of the fixed valve plate 1. The moving valve plate 2 and the fork 5 cooperate with the fixed valve plate 1 to connect the inlet and outlet. At this time, the valve assembly is subjected to water pressure: water inlet—the water pressure acts on the fork 5 to form upward and downward projected areas S1 and S3 respectively. After the inlet connects to the outlet, the water pressure passes through the pressure-inlet hole 7 of the fixed valve plate 1—pressure-inlet hole 7 of the moving valve plate 2—pressure-inlet groove 8 of the moving valve plate 2—first closed channel 211 of the moving valve plate 2—closed cavity 52 of the fork 5—forming an upward projected area S2; another stream of water continues to pass through the pressure-inlet hole 7 of the moving valve plate 2—pressure-inlet channel 6 of the fork 5—pressure outlet—pressure-applying cavity 4 above the sealing groove of the fork 5—forming a downward projected area S4. According to design requirements, the areas of S2 and S4 are basically equal, and the areas of S1 and S3 are basically equal. The valve disc assembly is basically balanced under force, achieving a lower rotational torque of the valve disc assembly.

[0055] In summary, this invention integrates a pressure-inducing channel 6 within the stationary valve plate 1, the moving valve plate 2, and the shift fork 5, introducing the medium pressure within the flow channel of the valve body 3 into the pressure-applying chamber 4. This achieves pressure balance on both sides of the moving valve plate 2, fundamentally solving the problem of large opening and closing torque caused by medium pressure differences in existing valves. Simultaneously, it eliminates the need for a large-sized through-hole in the center of the valve plate, effectively ensuring the flow area of ​​the valve plate's flow channel and improving the valve's economic efficiency. Through multi-specification valve plate flow channel structure design, it can adapt to different application conditions, has a wide range of applications, a simple and stable transmission structure, high adjustment accuracy, and excellent operating performance and market application value.

[0056] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pressure balancing mechanism, comprising a fixed valve disc (1) and a movable valve disc (2) constituting a valve disc assembly, and a pressure chamber (4) disposed within a valve body (3), wherein the movable valve disc (2) is coaxially and rotatably disposed on the fixed valve disc (1), characterized in that: Also includes: The fork (5) has the movable valve plate (2) fixed on the end of the fork (5). The fork (5) drives the movable valve plate (2) to rotate coaxially on the fixed valve plate (1). The fork (5) is coaxially sleeved with a pressure plate (53). The end face of the pressure plate (53) and the valve body (3) form a pressure chamber (4). Pressure channel (6) is opened in the fixed valve plate (1), the moving valve plate (2) and the fork (5). One end of the pressure channel (6) is connected to the flow channel of the valve body (3), and the other end passes through the fixed valve plate (1), the moving valve plate (2) and the fork (5) and is connected to the pressure chamber (4).

2. The pressure balancing mechanism according to claim 1, characterized in that: The moving valve plate (2) has several slots (21) around its periphery, and the end of the shift fork (5) has several feet (51). The feet (51) are inserted into the slots (21) to connect the moving valve plate (2) to the end of the shift fork (5).

3. The pressure balancing mechanism according to claim 1 or 2, characterized in that: Pressure holes (7) are provided at the center of both the fixed valve plate (1) and the moving valve plate (2), and the two pressure holes (7) are connected to each other as part of the pressure channel (6).

4. The pressure balancing mechanism according to claim 3, characterized in that: The moving valve plate (2) has a pressure groove (8) at one end facing the fixed valve plate (1), and the pressure groove (8) is connected to the pressure hole (7).

5. The pressure balancing mechanism according to claim 1, characterized in that: The fixed valve plate (1) has at least one through hole and at least one blind hole, and the moving valve plate (2) has at least one conducting channel and at least one closed channel. The valve disc assembly is opened or closed by the cooperation between the conducting channel and the closed channel and the through hole and the blind hole.

6. The pressure balancing mechanism according to claim 5, characterized in that: The closed channel is a combination of a blind hole structure opened on the moving valve plate (2) or a through hole opened on the moving valve plate (2) and a closed cavity (52) provided on the shift fork (5).

7. The pressure balancing mechanism according to claim 6, characterized in that: The moving valve plate (2) is provided with a pressure groove (8) at one end facing the fixed valve plate (1). When the closed channel is a blind hole structure opened on the moving valve plate (2), one end of the pressure groove (8) is connected to the blind hole, and the other end of the pressure groove (8) is connected to the pressure hole (7). When the closed channel is a combination of a through hole opened on the moving valve plate (2) and a closed cavity (52) provided on the shift fork (5), one end of the pressure groove (8) is connected to the closed cavity (52), and the other end of the pressure groove (8) is connected to the pressure hole (7).

8. The pressure balancing mechanism according to claim 5, characterized in that: The blind hole on the fixed valve plate (1) is either a blind hole structure opened on the fixed valve plate (1) or a combination of a through hole opened on the fixed valve plate (1) and a closed cavity (31) provided in the valve body (3).

9. The pressure balancing mechanism according to claim 6, 7, or 8, characterized in that: The fixed valve plate (1) is provided with a first through hole (101) and a first blind hole (111), and the moving valve plate (2) is provided with a first conducting channel (201) and a first closing channel (211). The fixed valve plate (1) and the moving valve plate (2) have the following matching relationship: the first conducting channel (201) and the first blind hole (111) completely overlap, and the first closing channel (211) and the first through hole (101) completely overlap; or the first conducting channel (201) and the first through hole (101) completely overlap, and the first closing channel (211) and the first blind hole (111) completely overlap; or the first conducting channel (201) and the first through hole (101) partially overlap, and the first closing channel (211) and the first blind hole (111) partially overlap.

10. The pressure balancing mechanism according to claim 9, characterized in that: The first through hole (101) and the first blind hole (111) divide the end face of the fixed valve plate (1) into two equal parts, and each occupies one equal part. The first conducting channel (201) and the first closed channel (211) divide the end face of the moving valve plate (2) into two equal parts, and each occupies one equal part.

11. The pressure balancing mechanism according to claim 6, 7, or 8, characterized in that: The fixed valve plate (1) is provided with a first through hole (101), a second through hole (102), a first blind hole (111), and a second blind hole (112). The movable valve plate (2) is provided with a first through channel (201), a second through channel (202), a first closed channel (211), and a second closed channel (212). The fixed valve plate (1) and the movable valve plate (2) have the following matching relationship: the first through channel (201) and the first blind hole (111) are completely overlapped, the second through channel (202) and the second blind hole (112) are completely overlapped, the first closed channel (211) and the first through hole (101) are completely overlapped, and the second closed channel (212) and the second blind hole (112) are completely overlapped. The through hole (102) completely overlaps; or the first conductive channel (201) completely overlaps with the first through hole (101), the second conductive channel (202) completely overlaps with the second through hole (102), the first closed channel (211) completely overlaps with the second blind hole (112), and the second closed channel (212) completely overlaps with the first blind hole (111); or the first conductive channel (201) partially overlaps with the first through hole (101), the second conductive channel (202) partially overlaps with the second through hole (102), the first closed channel (211) partially overlaps with the second blind hole (112), and the second closed channel (212) partially overlaps with the first blind hole (111).

12. The pressure balancing mechanism according to claim 11, characterized in that: The first through hole (101), the second through hole (102), the first blind hole (111), and the second blind hole (112) are arranged alternately and evenly along the circumference of the fixed valve plate (1), dividing the end face of the fixed valve plate (1) into four equal parts, and each through hole and each blind hole occupies one equal part; the first conducting channel (201), the second conducting channel (202), the first closed channel (211), and the second closed channel (212) are arranged alternately and evenly along the circumference of the moving valve plate (2), dividing the end face of the moving valve plate (2) into four equal parts, and each conducting channel and each closed channel occupies one equal part.

13. The pressure balancing mechanism according to claim 6, 7, or 8, characterized in that: The fixed valve plate (1) is provided with a first through hole (101), a second through hole (102), a third through hole (103), and a first blind hole (111), a second blind hole (112), and a third blind hole (113). The moving valve plate (2) is provided with a first conducting channel (201), a second conducting channel (202), a third conducting channel (203), and a first closed channel (211), a second closed channel (212), and a third closed channel (213). The fixed valve plate (1) and the moving valve plate (2) are provided with a first conducting channel (201), a second conducting channel (202), a third conducting channel (203), and a first closed channel (211), a second closed channel (212), and a third closed channel (213). The valve plate (2) has the following mating relationships: the first conducting channel (201) completely overlaps with the first blind hole (111), the second conducting channel (202) completely overlaps with the second blind hole (112), the third conducting channel (203) completely overlaps with the third blind hole (113), the first closed channel (211) completely overlaps with the second through hole (102), the second closed channel (212) completely overlaps with the third through hole (103), and the third closed channel (213) completely overlaps with the first through hole (114). 01) Complete overlap; or the first conductive channel (201) completely overlaps with the second through hole (102), the second conductive channel (202) completely overlaps with the third through hole (103), the third conductive channel (203) completely overlaps with the first through hole (101), the first closed channel (211) completely overlaps with the second blind hole (112), the second closed channel (212) completely overlaps with the third blind hole (113), and the third closed channel (213) completely overlaps with the first blind hole (111). The first conductive channel (201) and the second through hole (102) are partially overlapped; the second conductive channel (202) and the third through hole (103) are partially overlapped; the third conductive channel (203) and the first through hole (101) are partially overlapped; the first closed channel (211) and the second blind hole (112) are partially overlapped; the second closed channel (212) and the third blind hole (113) are partially overlapped; and the third closed channel (213) and the first blind hole (111) are partially overlapped.

14. The pressure balancing mechanism according to claim 13, characterized in that: The first through hole (101), the second through hole (102), the third through hole (103) and the first blind hole (111), the second blind hole (112), the third blind hole (113) are arranged alternately and evenly along the circumference of the fixed valve plate (1), dividing the end face of the fixed valve plate (1) into six equal parts, and each through hole and each blind hole occupies one equal part; the first conducting channel (201), the second conducting channel (202), the third conducting channel (203) and the first closed channel (211), the second closed channel (212), the third closed channel (213) are arranged alternately and evenly along the circumference of the moving valve plate (2), dividing the end face of the moving valve plate (2) into six equal parts, and each conducting channel and each closed channel occupies one equal part.

15. A pressure balancing valve, comprising a valve body (3) and an actuator, wherein the valve body (3) is provided with an inlet and an outlet, characterized in that: It also includes a pressure balancing mechanism as described in any one of claims 1 to 14, wherein the actuator is connected to the shift fork (5) and drives the shift fork (5) to rotate the moving valve plate (2), and the fixed valve plate (1) and the moving valve plate (2) are arranged in the valve body (3) at a position between the inlet and the outlet, with the moving valve plate (2) arranged relative to the outlet and the fixed valve plate arranged relative to the inlet.

16. A pressure balancing valve, comprising a valve body (3) and an actuator, wherein the valve body (3) is provided with an inlet and an outlet, characterized in that: It also includes a pressure balancing mechanism as described in any one of claims 1 to 14, wherein the actuator is connected to the shift fork (5) and drives the shift fork (5) to rotate the moving valve plate (2), and the fixed valve plate (1) and the moving valve plate (2) are arranged in the valve body (3) at a position between the inlet and the outlet, with the moving valve plate (2) arranged relative to the inlet and the fixed valve plate arranged relative to the outlet.

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