Valve body assembly and fluid control valve

Abstract

The invention discloses a valve body assembly and a fluid control valve, and the valve body assembly comprises a valve seat which is provided with a flow inlet hole, a valve chamber and a flow outlet hole, and the valve chamber is provided with an assembly port; the valve body is arranged in the valve chamber, the valve body is provided with a flow guide channel and a through hole, and the flow inlet hole, the flow guide channel and the flow outlet hole form a fluid channel; the flow baffle is arranged in the flow guide channel; the transmission part comprises a deformable transmission shell and a transmission shaft body, and the transmission shell is arranged on the valve seat and seals the assembly opening; the transmission shell is configured to deform under the action of external force and drive the flow baffle to move between a first position and a second position, and the fluid channel is conducted when the flow baffle is located at the first position and is blocked when the flow baffle is located at the second position; a gap is formed between the transmission shaft body and the inner wall of the through hole, and a gap is formed between the flow baffle and the inner wall of the fluid channel. By means of the application, the leakage problem can be completely eradicated, and the friction problem caused by shaft hole sliding fit in the prior art can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a valve body assembly and a fluid control valve. Background Art

[0002] Fluid control valves such as pneumatic valves or hydraulic valves generally construct a channel for fluid to flow through by means of a valve seat and a valve body, and then drive a seal to switch positions within the channel through a driving unit to achieve the opening and blocking of the channel. In order for the transmission shaft connected to the driving unit to enter the channel, corresponding sliding holes often need to be opened on the valve seat or the valve body. The sliding fit between the transmission shaft and the sliding holes will inevitably have problems of friction and leakage. On the one hand, the above-mentioned friction problem will cause component wear, which will further exacerbate the friction and leakage problems; on the other hand, it will amplify the hysteresis effect of the driving unit's reset, which will reduce the control accuracy of the fluid control valve and make it difficult to meet the usage scenarios with high control accuracy requirements for power units in aerospace, ships, etc. The above-mentioned leakage problem will lead to the pollution of the fluid medium, and in severe cases, it will also cause misoperation of the actuator connected to the fluid control valve.

[0003] In the prior art, the above-mentioned friction problem is generally alleviated by setting a sliding bearing, and the probability of leakage is reduced by setting a dynamic seal. However, the scheme of adding a sliding bearing or a dynamic seal will increase the manufacturing cost and the assembly difficulty, and with the increase of the service life and the number of uses, the problems of friction and leakage will still become so serious that they cannot meet the usage requirements. Summary of the Invention

[0004] This application aims to solve one of the technical problems in the related art to a certain extent. For this purpose, this application provides a valve body assembly and a fluid control valve.

[0005] To achieve the above object, this application adopts the following technical solution: A valve body assembly, comprising: A valve seat, provided with an inlet flow hole, a valve chamber, and an outlet flow hole that are sequentially connected, and the valve chamber has an assembly port; A valve body, disposed in the valve chamber and communicating with the assembly port, the valve body is provided with a diversion channel and a through hole communicating the diversion channel with the assembly port, and the inlet flow hole, the diversion channel, and the outlet flow hole are sequentially connected to form a fluid channel; and, A baffle plate, disposed in the diversion channel; The valve body assembly further includes a transmission member, the transmission member includes a deformable transmission shell and a transmission shaft body disposed on the transmission shell, the transmission shell is disposed on the valve seat and closes the assembly port, and the transmission shaft body extends into the diversion channel through the through hole and is connected to the baffle plate; Wherein, the transmission housing is configured to be deformed under the action of an external force and to drive the baffle plate to move between a first position and a second position through the deformation, the fluid channel is open when the baffle plate is in the first position, and the fluid channel is blocked when the baffle plate is in the second position; There is a gap between the transmission shaft and the inner wall of the perforation, and there is a gap between the baffle and the inner wall of the fluid channel in a direction perpendicular to the moving direction of the baffle.

[0006] The application of the present invention has the following beneficial effects: the baffle plate is driven by the deformation of the transmission housing, so that the baffle plate can switch between the first position and the second position, meeting the functional requirements of the fluid control valve. On this basis, the leakage problem can be completely eliminated by closing the assembly port through the transmission housing. At the same time, the transmission shaft body and the inner wall of the perforation are designed to have a gap, and the baffle plate and the inner wall of the fluid channel are designed to have a gap, which can avoid the friction problem caused by the sliding fit of the shaft hole in the prior art.

[0007] Optionally, the transmission shell includes an annular connecting shell and a transmission plate arranged in the middle of the annular connecting shell, and the transmission shaft is arranged at the center position of the transmission plate; the transmission member is fixed to the valve seat through the annular connecting shell, and the transmission plate is located at the assembly port and can produce the deformation under the action of external force.

[0008] Optionally, the end face of the valve body close to the assembly port is spaced apart from the transmission plate, and the end face of the valve body close to the assembly port is provided with an annular protrusion at its edge, and the end face of the annular protrusion is sealed with the bottom face of the annular connecting shell.

[0009] Optionally, the transmission member also includes a driven shaft located on the transmission plate, the driven shaft and the transmission shaft are coaxial and respectively located on both sides of the transmission plate, and the end of the driven shaft away from the transmission plate forms a driven end, and the driven end is used to withstand external force to drive the transmission plate to deform.

[0010] Optionally, the diameter of the driven shaft is larger than the diameter of the transmission shaft, and a stress release unit is provided on a portion of the transmission plate between the inner ring surface of the annular connecting shell and the outer ring surface of the driven shaft.

[0011] Optionally, the valve body assembly further comprises a first elastic member disposed between an inner wall of the valve body and the baffle plate, wherein the first elastic member applies pressure to the baffle plate so that the transmission shaft has a tendency to move toward the outside of the valve chamber.

[0012] Optionally, the valve body assembly further includes a second elastic member disposed in the diversion channel. The second elastic member is provided with a positioning hole. The baffle is a rotating body structure and is provided with a positioning protrusion at its center. The baffle is positioned on the second elastic member by snapping the positioning protrusion into the positioning hole, and the transmission shaft body abuts against the positioning protrusion.

[0013] Optionally, the valve body is provided with a diversion hole and a cavity with an open end. The diversion hole communicates with the cavity and cooperates to form the diversion channel. The diversion hole communicates with the inflow hole, and the open end communicates with the outflow hole; the through hole communicates with the cavity, and the baffle is disposed in the cavity.

[0014] Optionally, the bottom wall of the valve chamber is provided with a boss extending into the cavity. The opening of the outflow hole is formed on the end face of the boss. When the baffle is in the first position, it is separated from the boss to conduct the cavity and the outflow hole. When the baffle is in the second position, it fits and seals with the boss to block the cavity and the outflow hole; or, a convex edge is provided on the inner wall of the cavity. The convex edge divides the cavity into a first chamber and a second chamber. The first chamber communicates with the outflow hole through the open end. The second chamber communicates with the through hole and the diversion hole. When the baffle is in the first position, it is separated from the convex edge to conduct the first chamber and the second chamber. When the baffle is in the second position, it fits and seals with the convex edge to block the first chamber and the second chamber.

[0015] In addition, the present application also provides a fluid control valve, including a driving unit. The fluid control valve further includes the valve body assembly according to any one of the above technical solutions. The driving unit is disposed on the valve seat and / or the transmission member, and the driving unit is used to apply pressure to the transmission housing to drive the deformation of the transmission housing.

[0016] The reasoning process of the beneficial effects of the fluid control valve provided by the present application is similar to that of the foregoing valve body assembly, and will not be elaborated here.

[0017] These features and advantages of the present application will be disclosed in detail in the following specific embodiments and the drawings. The best embodiments or means of the present application will be shown in detail in combination with the drawings, but it is not a limitation to the technical solution of the present application. In addition, these features, elements, and components appear in multiple in each of the following texts and drawings, and different symbols or numbers are marked for convenience of representation, but all represent components with the same or similar structures or functions. Description of the Drawings

[0018] The following further describes the present application with reference to the drawings: Figure 1 It is a schematic structural diagram of a valve body assembly provided in Embodiment 1 of the present application; Figure 2 It is an exploded view of the valve body assembly provided in Embodiment 1; Figure 3 Longitudinal sectional view of the valve body assembly provided for the first embodiment; Figure 4 Structural schematic diagram of the transmission member in the first embodiment; Figure 5 Assembly schematic diagram of the second elastic member and the baffle plate in the first embodiment; Figure 6 Structural schematic diagram of the fluid control valve applying the valve body assembly provided for the first embodiment; Figure 7 For Figure 6 Exploded view of the fluid control valve in; Figure 8 For Figure 6 Sectional view of the fluid control valve in; Figure 9 Exploded view of a valve body assembly provided for the second embodiment; Figure 10 Longitudinal sectional view of the valve body assembly provided for the second embodiment.

[0019] Wherein, 1, valve seat; 10, inlet flow hole; 11, valve chamber; 110, assembly port; 111, boss; 12, outlet flow hole; 2, valve body; 20, diversion channel; 21, diversion hole; 22, cavity; 220, first chamber; 221, second chamber; 222, convex edge; 23, perforation; 24, annular protrusion; 3, baffle plate; 30, positioning protrusion; 4, transmission member; 40, transmission housing; 400, annular connection housing; 401, transmission plate; 4010, stress relief groove; 41, drive shaft body; 42, driven shaft body; 43, snap ring; 5, first elastic member; 6, second elastic member; 60, positioning hole; 7, drive unit; 70, upper cover; 71, threaded pipe; 72, plug; 73, bellows; 74, stacked piezoelectric ceramics; 75, centering sphere; 8, outer housing; 80, installation cavity; 81, step groove; 82, first nut; 83, second nut; 84, lower opening; 9, return spring. Detailed implementation manners

[0020] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. Based on the embodiments in the implementation manners, it is intended to explain the present application and should not be construed as a limitation to the present application.

[0021] As used in this specification, the phrase "an embodiment" or "example" or "instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed in the present application. The appearances of the phrase "in an embodiment" in various positions in the specification do not necessarily refer to the same embodiment.

[0022] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Embodiment 1: This embodiment provides a valve body assembly, such as Figure 1 , Figure 2 and Figure 3 As shown, the valve body assembly includes a valve seat 1, a valve body 2, a baffle plate 3 and a transmission member 4. The valve seat 1 is provided with an inlet hole 10, a valve chamber 11 and an outlet hole 12 which are connected in sequence, the valve chamber 11 has an assembly port 110, the valve body 2 is arranged in the valve chamber 11 through the assembly port 110, and the valve body 2 is connected with the assembly port 110. The valve body 2 is provided with a guide channel 20, the baffle plate 3 is arranged in the guide channel 20, the inlet hole 10, the guide channel 20 and the outlet hole 12 are connected in sequence to form a fluid channel. The valve body 2 is also provided with a through hole 23 which connects the guide channel 20 with the assembly port 110. The transmission member 4 includes a deformable transmission shell 40 and a transmission shaft body 41 arranged on the transmission shell 40, the transmission shell 40 is arranged on the valve seat 1 and closes the assembly port 110, and the transmission shaft body 41 extends into the guide channel 20 through the through hole 23 and is connected with the baffle plate 3.

[0025] The transmission housing 40 in this embodiment is configured to be deformed under the action of an external force and to drive the baffle plate 3 to move between the first position and the second position through the deformation. The baffle plate 3 conducts the fluid passage when it is in the first position, and blocks the fluid passage when it is in the second position. The baffle plate 3 is driven by the deformation of the transmission housing 40, so that the baffle plate 3 can switch between the first position and the second position, meeting the functional requirements of the fluid control valve. At the same time, the transmission housing 40 closes the assembly port 110, which can completely prevent leakage.

[0026] In this embodiment, the transmission shaft body 41 is designed to have a gap with the inner wall of the through hole 23. At the same time, in the direction perpendicular to the moving direction of the baffle 3, the baffle 3 is designed to have a gap with the inner wall of the fluid passage. This can avoid the friction problem caused by the sliding fit of the shaft hole in the prior art and improve the control accuracy and response speed of the fluid control valve.

[0027] Furthermore, the transmission housing 40 in this embodiment includes an annular connecting housing 400 and a transmission plate 401 disposed in the middle of the annular connecting housing 400. The transmission shaft body 41 is disposed at the central position of the transmission plate 401. The transmission member 4 is fixedly disposed on the valve seat 1 through the annular connecting housing 400, and the transmission plate 401 is located at the assembly port 110 and can be deformed under the action of an external force. Through the above structural design, it is convenient to realize the deformation of the transmission housing 40. Specifically, the transmission member 4 in this embodiment is made of metal, and the transmission plate 401 is a thin metal sheet, and the transmission member 4 can be integrally formed.

[0028] As Figure 3 shown, one end face of the valve body 2 close to the assembly port 110 is spaced from the transmission plate 401. Setting this gap can prevent the transmission plate 401 from interfering with the valve body 2 during deformation. And an annular protrusion 24 is provided at the edge of one end face of the valve body 2 close to the assembly port 110, and the end face of the annular protrusion 24 is in sealing fit with the bottom surface of the annular connecting housing 400. The contact surfaces between the valve seat 1 and the transmission member 4 and between the valve body 2 and the transmission member 4 can be electrolytically polished to improve the sealing performance between the transmission member 4 and the valve seat 1 and the valve body 2. Sealing rings can also be provided between the transmission member 4 and the valve seat 1 and the valve body 2. In this embodiment, a connecting hole is provided on the transmission housing 40, and screws can be used to pass through the connecting hole to threadedly lock the transmission member 4 on the valve seat 1.

[0029] Combined with Figure 2 and Figure 4 shown, the transmission member 4 in this embodiment further includes a driven shaft body 42 located on the transmission plate 401. The driven shaft body 42 and the transmission shaft body 41 are coaxial and are respectively located on both sides of the transmission plate 401. One end of the driven shaft body 42 away from the transmission plate 401 forms a driven end, and the driven end is used to bear an external force to drive the transmission plate 401 to deform. Setting the driven shaft body 42 and using the driven end to bear the external force makes it easier to cause the transmission plate 401 to deform. Furthermore, the diameter of the driven shaft body 42 in this embodiment is larger than the diameter of the transmission shaft body 41, and a stress release unit is provided on the part of the transmission plate 401 between the inner circumferential surface of the annular connecting housing 400 and the outer circumferential surface of the driven shaft body 42. Specifically, the stress release unit is an annular stress release groove 4010. Through the above structural design, it can further make the transmission plate 401 prone to deformation and make the transmission member 4 respond faster to the external pressure.

[0030] The valve body assembly provided in this embodiment further includes a first elastic member 5 disposed between the inner wall of the valve body 2 and the baffle 3. The first elastic member 5 presses against the baffle 3 so as to make the transmission shaft body 41 tend to move outside the valve chamber 11. In this way, when the external force applied to the driven end is withdrawn, the baffle 3 can be pushed by the first elastic member 5 to quickly return the baffle 3 and the transmission member 4 to their original positions, further improving the response speed of the valve body assembly.

[0031] In addition, the valve body assembly provided in this embodiment further includes a second elastic member 6 disposed in the diversion channel 20. The second elastic member 6 is provided with a positioning hole 60. Specifically, as shown in Figure 5 In this embodiment, the second elastic member 6 is a disc spring. A positioning hole 60 is provided at the center of the disc spring. The baffle 3 is a rotary body structure and a positioning protrusion 30 is provided at its center. The baffle 3 is positioned on the second elastic member 6 by fitting the positioning protrusion 30 into the positioning hole 60, and the transmission shaft body 41 abuts against the positioning protrusion 30. Through the above structural design, the transmission member 4 and the baffle 3 can be separately designed into two parts, which is convenient for the assembly of the baffle 3 and the valve body 2, and also convenient for the assembly of the transmission member 4 and the valve body 2. At the same time, the second elastic member 6 itself can also play the role of the above-mentioned first elastic member 5 in pushing the baffle 3 to reset. In this embodiment, the valve body 2 is provided with a diversion hole 21 and a cavity 22 with an open end. The diversion hole 21 is communicated with the cavity 22 and cooperates to form a diversion channel 20. The diversion hole 21 is communicated with the inlet hole 10, and the open end is communicated with the outlet hole 12. A through hole 23 is communicated with the cavity 22, and the baffle 3 is disposed in the cavity 22. A step is provided on the inner wall of the cavity 22, and the edge of the second elastic member 6 abuts against the step. Under the pressing action of the first elastic member 5, the second elastic member 6 and the baffle 3 positioned on the second elastic member 6 can be kept stable relative to the valve body 2. After the transmission member 4 applies sufficient pressure to the baffle 3, the second elastic member 6 and the first elastic member 5 can be deformed, and the baffle 3 can be driven to move.

[0032] The valve body assembly provided in this embodiment is of a normally open structure, that is, when the compression end does not receive an external force sufficient to cause the transmission plate 401 to deform, the baffle 3 is in the first position; when the compression end receives an external force sufficient to cause the transmission plate 401 to deform, the transmission plate 401 deforms and drives the baffle 3 to move, so that the baffle 3 switches to the second position. Specifically, a boss 111 extending into the cavity 22 is provided on the bottom wall of the valve chamber 11 in this embodiment, and the opening of the outlet hole 12 is formed on the end face of the boss 111. When the baffle 3 is in the first position, it is separated from the boss 111 to conduct the cavity 22 and the outlet hole 12. When the baffle 3 is in the second position, it fits and seals with the boss 111 to block the cavity 22 and the outlet hole 12.

[0033] The first elastic member 5 is a compression spring, which is sleeved on the outside of the boss 111 , with one end of the compression spring abutting against the baffle plate 3 , and the other end of the compression spring abutting against the bottom wall of the valve chamber 11 .

[0034] The valve body assembly provided in this embodiment can be applied to a fluid control valve, which can be a pneumatic valve or a hydraulic valve. Figure 6 , Figure 7 and Figure 8 As shown, the fluid control valve includes a drive unit 7, which is disposed on the transmission member 4 and is used to apply pressure to the transmission housing 40 to drive the transmission housing 40 to deform. In other optional embodiments, the drive unit 7 may also be disposed on the valve seat 1.

[0035] In order to further improve the response speed and control accuracy of the fluid control valve, and at the same time to reduce the design size of the fluid control valve, the driving unit 7 in this embodiment adopts stacked piezoelectric ceramics 74 as a power source. Compared with the traditional electromagnetic driving scheme, the stacked piezoelectric ceramics 74 driving scheme has the advantages of high integration, small size, and fast response speed.

[0036] Specifically, Figure 7 As shown, the driving unit 7 in this embodiment includes a piezoelectric ceramic packaging structure, which includes a bellows 73, a stacked piezoelectric ceramic 74 disposed in the bellows 73, an upper cover 70 disposed at one end of the bellows 73, a threaded tube 71 disposed at the other end of the bellows 73, a screw plug 72 threaded in the threaded tube 71, and a centering sphere 75 abutting between the screw plug 72 and the pressure-bearing end. Through the above structural design, when the stacked piezoelectric ceramic 74 is energized, the stacked piezoelectric ceramic 74 is deformed, which can drive the overall synchronous deformation of the piezoelectric ceramic packaging structure, and then push and press the pressure-bearing end of the transmission member 4 through the screw plug 72 and the centering sphere 75, drive the transmission plate 401 to deform, and drive the baffle plate 3 to move from the first position to the second position through the deformation of the transmission plate 401. The transmission member 4, bellows 73, upper cover 70, threaded tube 71 and screw plug 72 in this embodiment are all rotating body structures, and the centering sphere 75 is provided to transmit the force to ensure that the transmission direction of the force remains along the length direction of the stacked piezoelectric ceramics 74.

[0037] In this embodiment, the corrugated pipe 73, the upper cover 70, the threaded pipe 71 and the plug 72 cooperate to enclose a closed cavity, and the stacked piezoelectric ceramic 74 is arranged in the closed cavity, which can ensure that the stacked piezoelectric ceramic 74 is not contaminated. One end of the stacked piezoelectric ceramic 74 is fixedly connected to the upper cover 70, and the other end is abutted against the plug 72. In this way, the pre-tightening force applied to the stacked piezoelectric ceramic 74 can be adjusted by screwing the plug 72. By adjusting the pre-tightening force applied to the stacked piezoelectric ceramic 74, the stacked piezoelectric ceramic 74 can be in a better stress state, which can effectively improve its output linearity and reduce the hysteresis effect of the stacked piezoelectric ceramic 74.

[0038] Furthermore, the driving unit 7 further includes a housing 8. The housing 8 is provided with an installation cavity 80, and the above-mentioned piezoelectric ceramic packaging structure is arranged in the installation cavity 80. As Figure 7 shown, the main body part of the housing 8 is in a long cylindrical shape. One end of the housing 8 is provided with a flange. During assembly, screws can be used to threadedly lock and fix the flange of the housing 8 and the annular connecting shell 400 of the transmission member 4 to the valve seat 1 at the same time. Upper openings and lower openings 84 are respectively arranged at both ends of the housing 8. Both the upper opening and the lower opening 84 communicate the installation cavity 80 with the outside. The upper opening is located on the side where the upper cover 70 is located, and the lower opening 84 is located on the side where the transmission member 4 is located. And the transmission shaft body 41 of the transmission member 4 extends out of the installation cavity 80 through the lower opening 84.

[0039] In this embodiment, a step groove 81 is further arranged in the installation cavity 80 near the lower opening 84. The driving unit 7 further includes a return spring 9 and a snap ring 43 arranged in the installation cavity 80. The snap ring 43 is snap-fitted and fixed on the driven shaft body 42 of the transmission member 4. The return spring 9 is sleeved outside the driven shaft body 42. At the same time, one end of the return spring 9 abuts against the snap ring 43, and the other end of the return spring 9 abuts against the bottom wall of the step groove 81. In addition, the driving unit 7 further includes a first nut 82 screwed on the housing 8. The first nut 82 is arranged near the upper opening and abuts against the upper cover 70. Through the above structural design, the upper cover 70 is abutted by the first nut 82, and the transmission member 4 is abutted by the return spring 9. While maintaining the relative stability between the transmission member 4 and the piezoelectric ceramic packaging structure, the pre-tightening force applied to the stacked piezoelectric ceramic 74 can be further adjusted by screwing the first nut 82. In this way, after the overall assembly of the fluid control valve is completed, the pre-tightening force applied to the stacked piezoelectric ceramic 74 can also be conveniently adjusted from the outside.

[0040] In this embodiment, a second nut 83 is further arranged outside the housing 8. After the screwing operation of the first nut 82 is in place, the second nut 83 can be screwed to make the second nut 83 abut against the first nut 82, which can play a role in preventing loosening and avoid the first nut 82 from loosening relative to the housing 8 due to shaking or other reasons.

[0041] Furthermore, as Figure 8As shown, to reduce the negative impacts caused by component friction, in this embodiment, the transmission shaft body 41 is also designed to have a gap with the inner wall of the lower opening 84. At the same time, the upper cover 70, the corrugated pipe 73, the threaded pipe 71 and the plug 72 are also designed to have a gap with the inner wall of the installation cavity 80. This can further reduce the friction effect and improve the control accuracy and response speed of the fluid control valve.

[0042] Embodiment 2: This embodiment also provides a valve body assembly. As Figure 9 and Figure 10 shown, the difference between this embodiment and the above Embodiment 1 is that the valve body 2 in the valve body assembly provided in this embodiment is provided with a convex edge 222 on the inner wall of its cavity 22. The convex edge 222 divides the cavity 22 into a first chamber 220 and a second chamber 221. Among them, the first chamber 220 is communicated with the outflow hole 12 through an opening, the second chamber 221 is communicated with the through hole 23 and the diversion hole 21. When the baffle 3 is in the first position, it is separated from the convex edge 222 to conduct the first chamber 220 and the second chamber 221. When the baffle 3 is in the second position, it fits and seals with the convex edge 222 to block the first chamber 220 and the second chamber 221.

[0043] It should be noted that the second chamber 221 and the through hole 23 in this embodiment are a continuous opening formed on the valve body 2. For the convenience of description, in this embodiment, the part of the above opening between the diversion hole 21 and the assembly port 110 of the valve seat 1 is called the through hole 23, and the part of the above opening between the diversion hole 21 and the second chamber 221 is called the first chamber 220.

[0044] It is easy to understand that the fluid control valve applying the valve body assembly provided in this embodiment is a normally closed valve.

[0045] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. A valve body assembly, comprising: A valve seat (1) is provided with an inlet hole (10), a valve chamber (11), and an outlet hole (12) which are connected in sequence, and the valve chamber (11) has an assembly port (110); A valve body (2) is arranged in the valve chamber (11) and is connected to the assembly port (110); the valve body (2) is provided with a flow guide channel (20) and a through hole (23) connecting the flow guide channel (20) and the assembly port (110); the flow inlet (10), the flow guide channel (20) and the flow outlet (12) are connected in sequence to form a fluid channel; and A baffle (3) disposed in the flow guide channel (20); The valve body assembly further comprises a transmission member (4), the transmission member (4) comprising a deformable transmission housing (40) and a transmission shaft (41) arranged on the transmission housing (40), the transmission housing (40) being arranged on the valve seat (1) and closing the assembly opening (110), the transmission shaft (41) extending through the through hole (23) into the flow guide channel (20) and being connected to the baffle plate (3); The transmission housing (40) is configured to be deformed under the action of an external force and to drive the baffle plate (3) to move between a first position and a second position through the deformation, the fluid passage being open when the baffle plate (3) is in the first position, and the fluid passage being blocked when the baffle plate (3) is in the second position; There is a gap between the transmission shaft (41) and the inner wall of the through hole (23), and there is a gap between the baffle plate (3) and the inner wall of the fluid channel in a direction perpendicular to the moving direction of the baffle plate (3).

2. The valve body assembly according to claim 1, wherein, The transmission housing (40) comprises an annular connection housing (400) and a transmission plate (401) arranged in the middle of the annular connection housing (400), and the transmission shaft (41) is arranged at the center of the transmission plate (401); The transmission member (4) is fixedly arranged on the valve seat (1) via an annular connecting shell (400); the transmission plate (401) is located at the assembly opening (110) and is capable of generating the deformation under the action of an external force.

3. The valve body assembly according to claim 2, wherein, An end surface of the valve body (2) close to the assembly opening (110) is spaced apart from the transmission plate (401), and an annular protrusion (24) is provided at the edge of the end surface of the valve body (2) close to the assembly opening (110), and the end surface of the annular protrusion (24) is in close contact with the bottom surface of the annular connection shell (400) for sealing.

4. The valve body assembly according to claim 2, wherein, The transmission member (4) further comprises a driven shaft (42) located on the transmission plate (401); the driven shaft (42) and the transmission shaft (41) are coaxial and respectively located on two sides of the transmission plate (401); one end of the driven shaft (42) away from the transmission plate (401) forms a driven end; the driven end is used to withstand an external force to drive the transmission plate (401) to deform.

5. The valve body assembly according to claim 4, wherein, The diameter of the driven shaft body (42) is greater than the diameter of the transmission shaft body (41), and a stress release unit is provided on a portion of the transmission plate (401) located between the inner ring surface of the annular connecting shell (400) and the outer ring surface of the driven shaft body (42).

6. The valve body assembly according to any one of claims 1 to 5, wherein, The valve body assembly further includes a first elastic member (5) disposed between the inner wall of the valve body (2) and the baffle plate (3), and the first elastic member (5) presses on the baffle plate (3) so that the transmission shaft body (41) has a tendency to move out of the valve chamber (11).

7. The valve body assembly according to any one of claims 1 to 5, wherein, The valve body assembly further includes a second elastic member (6) disposed in the diversion channel (20). The second elastic member (6) is provided with a positioning hole (60). The baffle plate (3) is of a rotary body structure and has a positioning protrusion (30) at its center. The baffle plate (3) is positioned on the second elastic member (6) by fitting the positioning protrusion (30) into the positioning hole (60), and the transmission shaft body (41) abuts against the positioning protrusion (30).

8. The valve body assembly according to any one of claims 1 to 5, wherein, The valve body (2) is provided with a diversion hole (21) and a cavity (22) with an open end. The diversion hole (21) communicates with the cavity (22) and cooperates to form the diversion channel (20). The diversion hole (21) communicates with the inlet hole (10), and the open end communicates with the outlet hole (12). The through hole (23) communicates with the cavity (22), and the baffle plate (3) is disposed in the cavity (22).

9. The valve body assembly according to claim 8, wherein, The bottom wall of the valve chamber (11) is provided with a boss (111) extending into the cavity (22). The opening of the outlet hole (12) is formed on the end face of the boss (111). When the baffle plate (3) is in the first position, it is separated from the boss (111) to conduct the cavity (22) and the outlet hole (12). When the baffle plate (3) is in the second position, it fits and seals with the boss (111) to block the cavity (22) and the outlet hole (12). Alternatively, a convex edge (222) is provided on the inner wall of the cavity (22). The convex edge (222) divides the cavity (22) into a first chamber (220) and a second chamber (221). The first chamber (220) communicates with the outlet hole (12) through the open end. The second chamber (221) communicates with the through hole (23) and the diversion hole (21). When the baffle plate (3) is in the first position, it is separated from the convex edge (222) to conduct the first chamber (220) and the second chamber (221). When the baffle plate (3) is in the second position, it fits and seals with the convex edge (222) to block the first chamber (220) and the second chamber (221).

10. A fluid control valve, comprising a driving unit, wherein, The fluid control valve further includes a valve body assembly as described in any one of claims 1 to 9. The driving unit is disposed on the valve seat (1) and / or the transmission member (4), and the driving unit is used to apply pressure to the transmission housing (40) to drive the deformation of the transmission housing (40).

Images