Sanitary diaphragm adjusting corner valve

Abstract

An inlet and an outlet are formed in the lower side and the right side of a valve body respectively, a valve seat is formed in the valve body, a diaphragm adjusting valve element is located above the valve seat, a driving device is located above the valve seat, a positioner is located above the driving device, and the positioner drives the driving device. The driving device drives the diaphragm adjusting valve element to move relative to the valve seat. When the valve element makes contact with the valve seat, the inlet and the outlet are disconnected. The valve is characterized in that the diaphragm adjusting valve element is arranged between the valve cover and the valve body, so that the valve can achieve flow adjustment under the closed condition, and the problem that a traditional valve is poor in sealing performance is solved; the valve also adopts a special corner structure, so that the problem that residues easily exist in an angle seat valve is solved; the conical adjusting valve element structure is matched with the unique corner structure, and the problem that a traditional valve is poor in flow adjusting stability is solved; the unique diaphragm adjusting valve element and corner design solves the problems of energy consumption and environmental pollution.

Description

Technical Field

[0001] The invention relates to an angle seat valve, in particular to a sanitary diaphragm regulating angle valve. Background Art

[0002] In modern times, domestic pneumatic angle seat valve products have been widely used, but the existing angle seat valve is a valve cover and valve body directly pressed together, the working medium will be in direct contact with the valve cover and valve stem, not only the sealing is not good, but also the working medium is easy to remain, which can no longer meet the requirements of no residue in water treatment and water supply systems in the health and food industries. However, there is a common problem of contradiction between the use pressure and the pneumatic control pressure, that is, the pressure of the medium used is required to be higher and higher, while the requirements for the pneumatic control force are getting lower and lower. The only solution at present is to use a larger cylinder to meet the small pneumatic control force, but this will result in a large valve volume, resulting in the need to increase the equipment space, thereby increasing the equipment volume and cost. In addition, the investment and consumption of pneumatic control force are large, which means that the current shortcomings have become the shackles of the development of automation equipment.

[0003] The sealing gaskets of existing pneumatic angle seat valves are all threadedly connected to the valve core body, that is, an external thread is formed on the side of the sealing gasket. When water with flocculent debris is transported in the pneumatic angle seat valve, the flocculent debris will be able to hang on the external thread of the sealing gasket, causing a gap in the seal between the sealing gasket and the valve seat, and even causing the service life of the sealing gasket to be reduced. The sanitary diaphragm valve mainly regulates the flow rate through the diaphragm. Because the structure of the diaphragm and the valve body determines that linear regulation cannot be achieved, the demand for precise proportioning cannot be met, and the flow regulation stability is poor.

[0004] At the same time, the contact between the gasket and the valve seat is likely to over-compress the gasket, resulting in a reduced life of the gasket.

[0005] Moreover, the sealing assembly in the valve cover is always soaked in water, which will reduce the service life of the sealing assembly.

[0006] At the same time, existing valves either fail to meet sanitary requirements or have poor flow regulation stability, resulting in energy waste and environmental pollution. Summary of the invention

[0007] The present invention aims to solve the above problems and provides a sanitary diaphragm regulating angle valve that can avoid the sealing part from being subjected to a large load force. It solves the problem of poor sealing of traditional valves, the problem of easy existence of residue in angle seat valves, the problem of large air control force required by existing air-controlled angle seat valves, the problem of poor flow regulation stability of traditional valves, and the problem of energy consumption and environmental pollution. It solves the problem of flocculent debris hooked on the external thread of the sealing gasket, the problem of excessive compression of the sealing gasket due to contact between the sealing gasket and the valve seat, and the problem of reduced service life caused by long contact time between the sealing assembly and water.

[0008] A sanitary diaphragm regulating angle valve, comprising: a valve body, a driving device, a positioner and a diaphragm regulating valve core, wherein an inlet and an outlet are respectively formed on the lower side and the right side of the valve body, a valve seat is formed inside the valve body, the diaphragm regulating valve core is located above the valve seat, the driving device is located above the valve seat, the positioner is located above the driving device, the positioner drives the driving device, and the driving device drives the diaphragm regulating valve core to move relative to the valve seat; when the diaphragm regulating valve core is separated from the valve seat, the inlet and the outlet are connected. A pilot-operated angle seat valve that can prevent the sealing part from being subjected to a large load force, comprising: a valve body, a driving device and a valve core, wherein an inlet and an outlet are respectively formed on the left and right sides of the valve body, a valve seat is formed inside the valve body, the valve core is located below the valve seat, the driving device is located above the valve seat, and the driving device drives the valve core to move relative to the valve seat; when the valve core contacts the valve seat, the inlet and the outlet are disconnected.

[0009] It also includes a valve stem and a spring. When the positioner loses power, the control gas in the air inlet cavity is discharged, the spring drives the piston to move downward, the piston drives the valve stem to move downward, and when the valve stem drives the diaphragm regulating valve core to contact the valve seat, the inlet and the outlet are disconnected. Further, it also includes a valve stem and a second valve core. The valve core includes a valve core body. The driving device drives the valve stem to move up and down. A cavity is formed inside the valve core body. The valve core body is formed with a second valve seat. The second valve seat is above the cavity. The valve core body is formed with a through hole connected to the cavity. The second valve core is in the cavity. The valve stem penetrates the valve core body and is fixedly connected to the second valve core. The second valve core moves relative to the second valve seat. The second valve core connects the inlet and the outlet by separating from the second valve seat.

[0010] Furthermore, the diaphragm regulating valve core is fixedly connected to the valve body at the bottom, and the diaphragm regulating valve core is fixedly connected to the end cover at the top, and the valve body and the end cover are isolated by the diaphragm regulating valve core.

[0011] Furthermore, the piston is fixedly connected to the valve stem at the bottom, the valve stem is fixedly connected to the diaphragm regulating valve core, and the valve stem drives the diaphragm regulating valve core to move; when the diaphragm regulating valve core contacts the valve seat, the inlet and the outlet are disconnected. The valve core also includes a valve core gasket and a valve core sealing gasket, a first annular groove is formed above the valve core body, the valve core sealing gasket is placed in the first annular groove, the valve core gasket is located above the valve core sealing gasket, the valve core gasket is fixedly connected to the valve core body, and the valve core body and the valve core gasket clamp and fix the valve core sealing gasket; when the valve core sealing gasket contacts the valve seat, the inlet and the outlet are disconnected.

[0012] Furthermore, the positioner delivers a certain amount of gas to the driving device through the air guide pipe according to the magnitude of the input current, and the driving device drives the valve stem to move upward, and the valve stem drives the diaphragm regulating valve core to move upward by a certain distance, and the diaphragm regulating valve core is separated from the valve seat by a certain distance, and the inlet and the outlet are connected. The second valve core includes a valve stem gasket, a second sealing gasket and a second valve core body, and the valve stem gasket, the second sealing gasket, the second valve core body and the valve stem sleeve are arranged in sequence from top to bottom, and a second annular groove is formed above the second valve core body, and the second sealing gasket is placed in the second annular groove, and the valve stem and the valve stem sleeve clamp and fix the valve stem gasket, the second sealing gasket and the second valve core body; the second sealing gasket is separated from the second valve seat to connect the inlet and the outlet.

[0013] Furthermore, the upper part of the valve body is fixedly connected to the valve cover, and the driving device is installed above the valve cover.

[0014] The upper part of the valve body is fixedly connected to the valve cover, and the driving device is installed above the valve cover.

[0015] Furthermore, the driving device is a cylinder, which includes a shell, a spring and a piston. The lower end of the shell is fixedly connected to the upper end of the valve cover. The piston is located inside the shell and is slidably connected to the shell. The shell is formed with an air inlet and an air outlet, and the air inlet and the air outlet are respectively located below and above the piston. The spring is located above the piston, and one end of the spring is in contact with the piston and the other end is in contact with the shell.

[0016] The driving device is a cylinder, and the driving device includes a shell, a spring and a piston. The lower end of the shell is fixedly connected to the upper end of the valve cover, the piston is located inside the shell and is slidably connected to the shell, the shell is formed with an air inlet and an air outlet, and the air inlet and the air outlet are respectively located above and below the piston. The spring is located below the piston, and one end of the spring is in contact with the piston, and the other end is in contact with the shell.

[0017] Furthermore, there is a gap between the valve stem and the valve cover, and a seal for sealing is provided in the gap.

[0018] There is a gap between the valve stem and the valve cover, and a sealing assembly for sealing is arranged in the gap.

[0019] The present invention has the following advantages: a diaphragm regulating valve core is arranged between the valve cover and the valve body, so that the valve can adjust the flow rate in a closed state, solving the problem of poor sealing of existing valves; a special corner structure is adopted to solve the problem that the working medium is easy to remain, which can no longer meet the requirement of no residue in water treatment and water supply systems in the health and food industries; the combination of the conical diaphragm regulating valve core structure and the unique corner structure solves the problem of poor flow regulation stability; the unique diaphragm and corner design solves the waste of energy and environmental pollution.

[0020] First open the second valve core, and when the water pressure above and below the valve core is balanced, open the valve core. Since the contact area between the second valve core and water is small, the water pressure is small when opening the second valve core. When the second valve core is fully opened, the opening process of the valve core does not need to overcome the water pressure. Therefore, the air control force required for the present application is smaller than that for directly opening the valve core, which solves the problem that the air control force required for the existing air-controlled angle seat valve is large; the valve core sealing gasket and the second sealing gasket are fixed by clamping, and no thread is required, which solves the problem that the external thread of the sealing gasket hooks flocculent debris; the upper surface of the second valve core body contacts the valve core body to limit the position, preventing the second sealing gasket from being over-compressed, and the valve core body contacts the valve body to limit the position, preventing the valve core sealing gasket from being over-compressed, which solves the problem that the sealing gasket is easily over-compressed when it contacts the valve seat; by setting the valve core below the valve seat, when the present application is closed, the water is only below the valve core, and the sealing assembly does not contact with water, which solves the problem of reduced service life caused by long contact time between the sealing assembly and water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] Figure 1 : A schematic diagram of the front cross-sectional structure of the present invention (when closed); Figure 2 : A schematic diagram of the main cross-sectional structure of the present invention (when opened); Figure 3 : Schematic diagram of the liquid flow direction of the present invention (when opened). DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and examples: Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] like Figures 1 to 3 As shown, this embodiment provides a sanitary diaphragm regulating angle valve which can prevent the sealing part from being subjected to a large load force. The valve comprises: a valve body 1, a driving device 2, a positioner 3 and a diaphragm regulating valve core 11. The valve body 1 is respectively provided with an inlet 12 and an outlet 13 on the lower side and the right side. A valve seat is formed inside the valve body 1. The diaphragm regulating valve core 11 is located above the valve seat. The driving device 2 is located above the valve seat. The positioner 3 is located above the driving device 2. The positioner 3 drives the driving device 2, and the driving device 2 drives the diaphragm regulating valve core 11 to move relative to the valve seat. When the diaphragm regulating valve core 11 is separated from the valve seat, the inlet 12 and the outlet 13 are connected. A valve body 1, a driving device 2 and a valve core, wherein the valve body 1 is respectively formed with an inlet 11 and an outlet 12 on the left and right sides, a valve seat 13 is formed inside the valve body 1, the valve core is located below the valve seat 13, the driving device 2 is located above the valve seat 13, and the driving device 2 drives the valve core to move relative to the valve seat 13; when the valve core contacts the valve seat 13, the inlet 11 and the outlet 12 are disconnected.

[0027] Furthermore, when the valve stem 10 and the spring 5 and the positioner 3 lose power, the control gas in the air inlet chamber 7 is discharged, the spring 5 drives the piston 4 to move downward, the piston 4 drives the valve stem 10 to move downward, and when the valve stem 10 drives the diaphragm regulating valve core 11 to contact the valve seat, the inlet 12 and the outlet 13 are disconnected.

[0028] The inlet 11 and the outlet 12 are located on the same axis, and the inlet 11 and the outlet 12 are inclined relative to the valve stem 5. Figure 1 and Figure 2 The inlet 11 and the outlet 12 are both perpendicular to the valve stem 5).

[0029] Furthermore, it also includes a diaphragm regulating valve core 11 fixedly connected to the valve body 1 at the bottom, and the diaphragm regulating valve core 11 fixedly connected to the end cover 9 at the top, and the valve body 1 is isolated from the end cover 9 by the diaphragm regulating valve core 11. A valve stem 5 and a second valve core, the valve core includes a valve core body 34, the driving device 2 drives the valve stem 5 to move up and down, a cavity is formed inside the valve core body 34, a second valve seat 341 is formed on the inside of the cavity, a through hole 342 connected to the cavity is formed on the valve core body 34, the second valve seat 341 is above the cavity, the valve core body 34 is formed with a through hole 342 connected to the cavity, the second valve core is in the cavity, the valve stem 5 penetrates the valve core body 34 and is fixedly connected to the second valve core, the second valve core moves relative to the second valve seat 341, and the second valve core connects the inlet 11 and the outlet 12 by separating from the second valve seat 341.

[0030] Furthermore, the piston 4 is fixedly connected to the valve stem 10 at the bottom, and the valve stem 10 is fixedly connected to the diaphragm regulating valve core 11, and the valve stem 10 drives the diaphragm regulating valve core 11 to move; when the diaphragm regulating valve core 11 contacts the valve seat, the inlet 12 and the outlet 13 are disconnected. The valve core body 34 is fixedly connected to the valve core sleeve 35 at the bottom, and the valve stem 5 is fixedly connected to the valve stem sleeve 39, and the valve stem 5 drives the valve stem sleeve 39 to move; the valve stem sleeve 39 is inserted into the valve core sleeve 35 and is slidably connected to the valve core sleeve 35.

[0031] Furthermore, the positioner 3 delivers a certain amount of gas to the driving device 2 through the air guide pipe 14 according to the magnitude of the input current, and the driving device 2 drives the valve stem 10 to move upward, and the valve stem 10 drives the diaphragm regulating valve core 11 to move upward a certain distance, and the diaphragm regulating valve core 11 is separated from the valve seat by a certain distance, and the inlet 12 is connected to the outlet 13. The valve core also includes a valve core gasket 32 ​​and a valve core sealing gasket 33, a first annular groove is formed above the valve core body 34, and the valve core sealing gasket 33 is placed in the first annular groove, and the valve core gasket 32 ​​is located above the valve core sealing gasket 33, and the valve core gasket 32 ​​is fixedly connected to the valve core body 34, and the valve core body 34 and the valve core gasket 32 ​​clamp and fix the valve core sealing gasket 33; when the valve core sealing gasket 33 contacts the valve seat 13, the inlet 11 and the outlet 12 are disconnected.

[0032] Furthermore, the valve body 1 is fixedly connected to the valve cover 9 on the top, and the driving device 2 is installed on the valve cover 9. The second valve core includes a valve stem gasket 36, a second sealing gasket 37 and a second valve core body 38, and the valve stem gasket 36, the second sealing gasket 37, the second valve core body 38 and the valve stem sleeve 39 are arranged in sequence from top to bottom, a second annular groove is formed on the second valve core body 38, and the second sealing gasket 37 is placed in the second annular groove, and the valve stem 5 and the valve stem sleeve 39 clamp and fix the valve stem gasket 36, the second sealing gasket 37 and the second valve core body 38; the second sealing gasket 37 is separated from the second valve seat 341 to connect the inlet 11 and the outlet 12.

[0033] Furthermore, the upper part of the valve body 1 is fixedly connected to the valve cover 4 , and the driving device 2 is installed above the valve cover 4 .

[0034] Furthermore, the driving device 2 is a cylinder, and the driving device 2 includes a shell 6, a spring 5 and a piston 4. The lower end of the shell 6 is fixedly connected to the upper end of the valve cover 9. The piston 4 is located inside the shell 6 and is slidably connected to the shell 6. The shell 6 is formed with an air inlet 8 and an air outlet 15, and the air inlet 8 and the air outlet 15 are respectively located below and above the piston 26. The spring 5 is located above the piston 4, and one end of the spring 5 is in contact with the piston 4, and the other end is in contact with the shell 6.

[0035] The driving device 2 is a cylinder, and the driving device 2 includes a shell 20, a spring 23 and a piston 26. The lower end of the shell 20 is fixedly connected to the upper end of the valve cover 4. The piston 26 is located inside the shell 20 and is slidably connected to the shell 20. The shell 20 is formed with an air inlet 24 and an air outlet 25. The air inlet 24 and the air outlet 25 are respectively located above and below the piston 26. The spring 23 is located below the piston 26. One end of the spring 23 is in contact with the piston 26, and the other end is in contact with the shell 20.

[0036] Furthermore, there is a gap between the valve stem 10 and the valve cover 9, and a seal 16 for sealing is provided in the gap.

[0037] There is a gap between the valve stem 5 and the valve cover 4, and a sealing assembly 6 for sealing is arranged in the gap.

[0038] Working principle: When this application is closed, Figure 1As shown, the inlet 1112 and the outlet 123 are disconnected. At this time, the second valve seat 341 contacts and compresses the second sealing gasket 37, and the valve seat 13 contacts and compresses the sealing gasket 33 of the diaphragm regulating valve core 11, thereby isolating the inlet 1211 and the outlet 1312. At this time, the positioner 3 loses power, and no compressed air passes through the cylinder. The spring 235 exerts a downward force on the piston 264, thereby pressing the valve core sealing gasket 33 and the second sealing gasket 37 on the valve seat 13 and the second valve seat 341 respectively. At this time, water is at the inlet 11, and the water exerts an upward force on the valve core body 34 and the valve stem sleeve 39 through water pressure, that is, when the valve core body 34 and the valve stem sleeve 39 are closed, the upward force is provided by the water pressure and the force of the spring 23. In this way, the pressure of the spring 23 on the piston 26 can be reduced under the same sealing pressure, reducing the material cost of the spring 23; at the same time, the elastic force of the spring 23 overcome by the piston 26 of the cylinder when moving downward is reduced, so that a cylinder with a smaller thrust and volume can be used, which is conducive to reducing costs and reducing volume. In the closed state, there is no water above the valve core, and the water will not contact the sealing assembly 6 through the gap between the valve stem 5 and the valve cover 4, extending the service life of the sealing assembly 6. The valve stem 10 is driven downward to drive the diaphragm regulating valve core 11 to move downward, pressing on the valve seat sealing surface to form a seal.

[0039] When this application is opened, Figure 3As shown, the inlet 12 and the outlet 13 are connected. When a certain current is input to the positioner 3, the positioner 3 delivers compressed air of a certain pressure to the driver 2 through the air guide 14. The compressed air presses on the piston 4, driving the piston 4 to overcome the resistance of the spring 5 and move upward for a certain distance, thereby driving the valve stem 10 to move upward for a certain distance, and the valve stem 10 drives the diaphragm regulating valve core 11 to move upward for a certain distance, and the diaphragm regulating valve core 11 is separated from the valve seat sealing surface. By adjusting the input current of the positioner 3, the size of the compressed air pressure output by the positioner 3 can be adjusted, thereby controlling the distance of the piston 4 moving upward, controlling the distance of the valve stem 10 moving upward, and then controlling the distance of the diaphragm regulating valve core 11 moving upward. In particular, because the lower part of the diaphragm regulating valve core 11 is a conical structure, it can form a linear flow area with the inner hole of the valve body 1, which plays a role in stable regulation. Compressed air is introduced into the first air cavity 21 above the piston 26 from the air inlet 24, pushing the piston 26 to move downward, and the air in the second air cavity 22 below the piston 26 is discharged to the outside through the air outlet 25 and the muffler 27. The piston 26 drives the push rod 5 and then drives the second sealing gasket 37 and the second valve core body 38 to move downward, and the second sealing gasket 37 breaks away from the contact with the second valve seat 341, so that the water at the inlet 11 can enter the cavity through the through hole 342, and then flow upward through the second sealing gasket and the second valve seat 341, and finally flow out from the outlet 12. At this time, the inlet 11 is connected to the outlet 12 and there is water in both, so that the water pressure above and below the valve core is equal, and there is no water pressure difference. Because the area of ​​the valve stem sleeve 39 in contact with the water is smaller than the valve core body 34, the water pressure on the second valve core is smaller, and the pressure overcome by the cylinder when opening the second valve core (that is, when the second valve core moves downward) is smaller, thereby reducing the force of the cylinder output and thus reducing the cylinder volume. At this time, the direction of water flow is as follows: Figure 3 As indicated by the solid black arrow in .

[0040] When the water pressure above and below the valve core and the second valve core is the same, the second valve core continues to move downward without being subject to the upward pressure of the water. The valve stem 5 continues to move downward, and the lower surface of the valve stem sleeve 39 contacts the upper surface of the valve core sleeve 35, pushing the valve core sleeve 35 and then driving the valve core to move downward, so that the valve seat 13 and the valve core sealing gasket 33 are completely separated, and the application is fully opened. At this time, the water flow direction is as follows Figure 3 As shown by the black solid arrow in FIG. At this time, the valve core sleeve 35 contacts the inner bottom surface of the valve body 1 to play a limiting role.

[0041] When the present application needs to be closed, the current input to the positioner 3 is stopped, the compressed air in the air inlet chamber 7 is discharged through the air inlet hole 8, and the spring 5 provides a downward force to the piston 4, thereby driving the valve stem 10 to move downward and driving the diaphragm regulating valve core 11 to move downward, pressing on the valve seat sealing surface to form a sealed air inlet 24 to stop the compressed air from entering the first air chamber 21, and the spring 23 resets to push the piston 26 to move upward, and the air in the first air chamber 21 is discharged outward. After the second valve seat 341 contacts the second sealing gasket 37, the valve stem 5 continues to move upward, driving the upper surface of the second valve core body 38 to contact the valve core body 34, preventing the second sealing gasket 37 from being over-compressed. The valve stem 5 continues to move upward, and the second valve core body 38 pushes the valve core body 34 to move upward. After the valve seat 13 contacts the valve core sealing gasket 33, until the valve core body 34 contacts the valve body 1, the valve stem 5 is limited, and the valve core sealing gasket 33 is prevented from being over-compressed. After completing the above actions, the application is closed, and the inlet 112 and the outlet 123 are disconnected.

[0042] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A sanitary diaphragm regulating angle valve, characterized in that: include: A valve body (1), a driving device (2), a positioner (3) and a diaphragm regulating valve core (11), wherein the valve body (1) is respectively provided with an inlet (12) and an outlet (13) on the lower side and the right side thereof, a valve seat is formed inside the valve body (1), the diaphragm regulating valve core (11) is located above the valve seat, the driving device (2) is located above the valve seat, the positioner (3) is located above the driving device (2), the positioner (3) drives the driving device (2), and the driving device (2) drives the diaphragm regulating valve core (11) 1) moves relative to the valve seat; when the diaphragm regulating valve core (11) is separated from the valve seat, the inlet (12) and the outlet (13) are connected; and further comprises a valve stem (10) and a spring (5); when the positioner (3) loses power, the control gas in the air inlet chamber (7) is discharged, the spring (5) drives the piston (4) to move downward, the piston (4) drives the valve stem (10) to move downward, and when the valve stem (10) drives the diaphragm regulating valve core (11) to contact the valve seat, the inlet (12) and the outlet (13) are disconnected.

2. A sanitary diaphragm regulating angle valve according to claim 1, characterized in that: The diaphragm regulating valve core (11) is fixedly connected to the valve body (1) at the bottom, and is fixedly connected to the end cover (9) at the top, so that the valve body (1) and the end cover (9) are isolated by the diaphragm regulating valve core (11).

3. The sanitary diaphragm regulating angle valve according to claim 1, characterized in that: The piston (4) is fixedly connected to a valve stem (10) at its lower side, and the valve stem (10) is fixedly connected to a diaphragm regulating valve core (11). The valve stem (10) drives the diaphragm regulating valve core (11) to move; when the diaphragm regulating valve core (11) contacts the valve seat, the inlet (12) and the outlet (13) are disconnected.

4. The sanitary diaphragm regulating angle valve according to claim 1, characterized in that: The positioner (3) delivers a certain amount of gas to the driving device (2) through the air guide pipe (14) according to the magnitude of the input current. The driving device (2) drives the valve stem (10) to move upward. The valve stem (10) drives the diaphragm regulating valve core (11) to move upward a certain distance. The diaphragm regulating valve core (11) is separated from the valve seat by a certain distance, and the inlet (12) and the outlet (13) are connected.

5. The sanitary diaphragm regulating angle valve according to claim 1, characterized in that: The upper portion of the valve body (1) is fixedly connected to the valve cover (9), and the driving device (2) is mounted above the valve cover (9).

6. The sanitary diaphragm regulating angle valve according to claim 5, characterized in that: The driving device (2) is a cylinder, comprising a housing (6), a spring (5) and a piston (4), wherein the lower end of the housing (6) is fixedly connected to the upper end of the valve cover (9), the piston (4) is located inside the housing (6) and is slidably connected to the housing (6), the housing (6) is formed with an air inlet (8) and an air outlet (15), the air inlet (8) and the air outlet (15) are respectively located below and above the piston (26), the spring (5) is located above the piston (4), one end of the spring (5) is in contact with the piston (4), and the other end is in contact with the housing (6).

7. The sanitary diaphragm regulating angle valve according to claim 5, characterized in that: There is a gap between the valve stem (10) and the valve cover (9), and a seal (16) for sealing is provided in the gap.

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