A diaphragm valve

Abstract

The invention discloses a diaphragm valve, which relates to the technical field of fluid control valves. A diaphragm valve comprises: a valve body, a valve core assembly and a valve core drive assembly. The valve core assembly is connected to the valve body. The valve body is provided with an inlet fluid channel, a valve port and an outlet fluid channel. One end of the valve port is connected to the inlet fluid channel, and the other end is connected to the outlet fluid channel. The valve core assembly is used to open or close the valve port. The valve core drive assembly is connected to the valve core assembly. The valve core assembly is configured to drive the valve core assembly to open or close the valve port. The valve core drive assembly comprises a valve housing, an electromagnetic coil and a valve cover. The valve housing is connected to the valve body. The valve core assembly comprises a valve core, a valve core spring, a valve stem, a diaphragm and a stroke adjustment assembly, and the stroke adjustment assembly is arranged on the valve core. The stroke adjustment assembly can adjust the relative position of the valve stem and the valve core. The stroke of the valve stem can be conveniently and accurately adjusted through the stroke adjustment assembly, thereby adjusting the inlet and outlet pressure resistance, and realizing accurate control of the inlet and outlet pressure resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control valves, and in particular to a diaphragm valve. Background Art

[0002] In traditional fluid control valves, fluid will enter the valve core and cause corrosion of the valve core. Therefore, when the fluid is a highly corrosive solution, the valve stem and valve core need to be made of corrosion-resistant materials, which greatly increases the cost. The diaphragm valve uses a diaphragm to isolate the working medium. The diaphragm serves as both an opening and closing element at the valve port and a sealing element to isolate the medium from the valve core, effectively solving the above problems. However, the pressure resistance of the inlet and outlet of the diaphragm valve is usually determined by its mechanical structure. Once the mechanical structure is determined, it is difficult to adjust the pressure resistance of the inlet and outlet according to actual needs. In addition, this type of valve will introduce manufacturing errors in the mechanical structure of each part, making it difficult to accurately control the size of the inlet and outlet pressure resistance. Too low pressure resistance will lead to leakage, and too high pressure resistance will require greater spring force to overcome, and the energy consumption and heat generation required by the control part will increase. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a diaphragm valve that can control the inlet and outlet pressure resistance according to demand and reduce energy consumption.

[0004] The present invention provides a diaphragm valve, comprising a valve body, a valve core assembly and a valve core drive assembly, the valve core assembly is connected to the valve body, the valve body is provided with an inlet fluid channel, a valve port and an outlet fluid channel, one end of the valve port is connected to the inlet fluid channel, and the other end is connected to the outlet fluid channel, the valve core assembly is used to open or close the valve port, the valve core drive assembly is connected to the valve core assembly, and the valve core drive assembly drives the valve core assembly to open or close the valve port; the valve core drive assembly comprises a valve housing, an electromagnetic coil and a valve cover, the valve housing is connected to the valve body, the electromagnetic coil is arranged in the valve housing, the valve cover is arranged at one end of the valve housing and away from the valve body, and the valve cover is configured to seal the valve housing; the valve core assembly comprises a valve core, a valve core spring, a valve stem and a diaphragm, the valve core is movably arranged in the electromagnetic coil along the axial direction of the electromagnetic coil, the valve stem is inserted in the valve core, the valve The rod moves with the valve core, one end of the valve core spring abuts on the valve core drive assembly, and the other end abuts on the valve core, the valve core spring is configured to push the valve core close to the valve body, the diaphragm is arranged on the valve body and fits the valve port, the center position of the diaphragm is connected to the end of the valve stem, the valve stem moves to drive the diaphragm to undergo elastic deformation, the electromagnetic coil is configured to attract the valve core away from the valve body after being energized, the valve core drives the valve stem away from the valve body, the valve stem drives the diaphragm to deform and open the valve port, the valve core spring is configured to push the valve core close to the valve body, the valve core drives the valve stem close to the valve body, the valve stem drives the diaphragm to fit and close the valve port; the valve core assembly also includes a stroke adjustment assembly, the stroke adjustment assembly is arranged on the valve core, and the stroke adjustment assembly can adjust the relative position of the valve stem and the valve core.

[0005] A diaphragm valve according to an embodiment of the present invention has at least the following beneficial effects: a diaphragm valve, comprising a valve body, a valve core assembly and a valve core drive assembly, wherein the valve core drive assembly can drive the valve core assembly to complete the control of the opening and closing of the valve port on the valve body. A stroke adjustment assembly is provided on the valve core assembly, through which the relative position of the valve core and the valve stem can be conveniently and accurately adjusted, thereby achieving the stroke adjustment of the valve stem. When the stroke of the valve stem changes, the inlet and outlet pressure resistance changes accordingly, thereby achieving accurate control of the inlet and outlet pressure resistance.

[0006] According to a diaphragm valve described in the present invention, the stroke adjustment component includes an adjustment hole and a screw, a valve stem through hole is provided in the valve core, the valve stem is movably inserted in the valve stem through hole, the adjustment hole is opened on the valve core along a vertical direction of the axis of the valve stem through hole, the adjustment hole is a threaded hole, the adjustment hole is connected to the valve stem through hole, and the screw can be pressed against the valve stem to lock the relative position of the valve stem and the valve core.

[0007] According to the diaphragm valve of the present invention, the stroke adjustment components are provided in a plurality of groups, and the plurality of groups of the stroke adjustment components are evenly arranged along the circumference of the valve core.

[0008] According to the diaphragm valve of the present invention, a diaphragm sealing groove is provided on the valve body, a sealing ring is provided on the diaphragm, and the sealing ring is embedded in the diaphragm sealing groove.

[0009] According to the diaphragm valve of the present invention, a conical nozzle is provided at one end of the valve port close to the diaphragm, and a thickened portion is provided at one side of the diaphragm close to the valve port, and the thickened portion abuts against the conical nozzle.

[0010] According to the diaphragm valve of the present invention, the end surface of the tapered mouth is a plane, the thickened portion is provided with a V-shaped groove, and two edges of the end surface of the tapered mouth are embedded in the V-shaped groove.

[0011] According to the diaphragm valve of the present invention, the valve core assembly further comprises a pressing block, the pressing block is arranged between the valve core and the valve housing, and the pressing block is in contact with the diaphragm.

[0012] According to the diaphragm valve of the present invention, a convex ring is provided on a side of the pressure block close to the diaphragm, and the convex ring is configured to press against the diaphragm to make the diaphragm more compact.

[0013] According to the diaphragm valve of the present invention, the height of the outer periphery of the convex ring is higher than the height of the inner periphery of the convex ring.

[0014] A diaphragm valve according to the present invention further includes a middle shell and a surface cover, wherein the middle shell is sleeved on the valve core assembly and the valve core drive assembly and connected to the valve body, and the surface cover is buckled on one end of the middle shell and away from the valve body, and a threading hole is opened on the surface cover.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0019] Figure 2 A top view of a preferred embodiment of the present invention;

[0020] Figure 3 for Figure 2 Sectional view of section AA;

[0021] Figure 4 It is a partial cross-sectional view of a valve body of a preferred embodiment of the present invention;

[0022] Figure 5 It is a cross-sectional view of a valve core assembly according to a preferred embodiment of the present invention;

[0023] Figure 6 It is a cross-sectional view of a valve core of a preferred embodiment of the present invention;

[0024] Figure 7 for Figure 3 A partial enlarged view of point B in the middle.

[0025] Reference numerals:

[0026] Valve body 10, inlet fluid channel 11, valve port 12, tapered nozzle 121, outlet fluid channel 13, diaphragm sealing groove 14;

[0027] Valve core assembly 20, valve core 21, valve stem through hole 211, valve core spring 22, valve stem 23, diaphragm 24, sealing ring 241, thickened portion 242, V-shaped groove 243, stroke adjustment assembly 25, adjustment hole 251, machine screw 252, pressure block 26, convex ring 261;

[0028] Valve core drive assembly 30, valve housing 31, electromagnetic coil 32, valve cover 33. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated 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, and do not indicate or imply 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.

[0031] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0033] Reference Figures 1 to 7 A diaphragm valve includes: a valve body 10, a valve core assembly 20 and a valve core drive assembly 30. The valve core assembly 20 is connected to the valve body 10. The valve body 10 is provided with an inlet fluid channel 11, a valve port 12 and an outlet fluid channel 13. One end of the valve port 12 is connected to the inlet fluid channel 11, and the other end is connected to the outlet fluid channel 13. The valve core assembly 20 is used to open or close the valve port 12. The valve core drive assembly 30 is connected to the valve core assembly 20. The valve core drive assembly 30 is configured to drive the valve core assembly 20 to open or close the valve port 12.

[0034] The valve core driving assembly 30 can drive the valve core assembly 20 to move, and the movement of the valve core assembly 20 can realize the opening or closing of the valve port 12 .

[0035] The valve core driving assembly 30 includes a valve housing 31, an electromagnetic coil 32 and a valve cover 33. The valve housing 31 is connected to the valve body 10. The electromagnetic coil 32 is disposed in the valve housing 31. The valve cover 33 is disposed at one end of the valve housing 31 and away from the valve body 10. The valve cover 33 is configured to seal the valve housing 31.

[0036] When the valve port 12 needs to be opened, the electromagnetic coil 32 is energized to generate magnetic force to attract the valve core assembly 20 to separate from the valve body 10, thereby opening the valve port 12. When the valve port 12 needs to be closed, the electromagnetic coil 32 is de-energized, the magnetic force disappears, and the valve core assembly 20 is reset and abuts against the valve port 12, thereby closing the valve port 12.

[0037] The valve core assembly 20 includes a valve core 21, a valve core spring 22, a valve stem 23 and a diaphragm 24. The valve core 21 is movably arranged in the electromagnetic coil 32 along the axial direction of the electromagnetic coil 32. The valve stem 23 is inserted in the valve core 21. The valve stem 23 moves with the valve core 21. One end of the valve core spring 22 abuts against the valve core drive assembly 30, and the other end abuts against the valve core 21. The valve core spring 22 is configured to push the valve core 21 to approach the valve body 10. The diaphragm 24 is arranged on the valve body 10 and fits with the valve port 12. The center position of the diaphragm 24 is connected to the end of the valve stem 23. The valve stem 23 moves to drive the diaphragm 24 to undergo elastic deformation. The electromagnetic coil 32 is configured to attract the valve core 21 away from the valve body 10 after being energized, the valve core 21 drives the valve stem 23 away from the valve body 10, and the valve stem 23 drives the diaphragm 24 to deform and open the valve port 12. The valve core spring 22 is configured to push the valve core 21 to approach the valve body 10 , the valve core 21 drives the valve stem 23 to approach the valve body 10 , and the valve stem 23 drives the diaphragm 24 to fit and close the valve port 12 .

[0038] When the valve port 12 needs to be closed to cut off the flow of fluid, the valve core spring 22 pushes the valve core 21 to approach the valve body 10 , and the valve stem 23 drives the diaphragm 24 to fit and close the valve port 12 .

[0039] The valve core assembly 20 further includes a stroke adjustment assembly 25. The stroke adjustment assembly 25 is disposed on the valve core 21. The stroke adjustment assembly 25 can adjust the relative position of the valve stem 23 and the valve core 21.

[0040] The stroke adjustment component 25 can conveniently and accurately adjust the relative position of the valve core 21 and the valve stem 23, thereby realizing the stroke adjustment of the valve stem 23. When the stroke of the valve stem 23 changes, the inlet and outlet pressure resistance changes accordingly, realizing accurate control of the inlet and outlet pressure resistance.

[0041] In the diaphragm valve of the embodiment of the present invention, the working process is as follows:

[0042] When the diaphragm valve needs to be opened to allow fluid to pass through, the electromagnetic coil 32 is energized, attracting the valve core 21 away from the valve body 10 along the axial direction of the valve housing 31, driving the valve stem 23 away from the valve body 10, so that the center of the diaphragm 24 connected to the valve stem 23 is separated from the valve port 12, and the inlet fluid channel 11, the valve port 12, and the outlet fluid channel 13 are connected.

[0043] When the diaphragm valve needs to be closed to prevent the fluid from passing through, the electromagnetic coil 32 is de-energized, and the valve core 21 is pushed close to the valve body 10 by the valve core spring 22, driving the valve stem 23 close to the valve body 10, so that the center of the diaphragm 24 connected to the valve stem 23 is close to the valve port 12, and the fluid inlet channel 11 and the fluid outlet channel 13 are disconnected by the diaphragm 24.

[0044] When the pressure resistance of the inlet and outlet needs to be adjusted, the relative positions of the valve stem 23 and the valve core 21 can be adjusted through the stroke adjustment component 25, thereby realizing the stroke adjustment of the valve stem 23. Because the component providing the inlet and outlet pressure resistance is the valve core spring 22 which is a compression spring, when the stroke of the valve stem 23 changes, the inlet and outlet pressure resistance changes accordingly.

[0045] Reference Figure 3 , Figure 5 as well as Figure 6 The stroke adjustment assembly 25 includes an adjustment hole 251 and a screw 252. A valve stem through hole 211 is provided in the valve core 21. The valve stem 23 is movably inserted in the valve stem through hole 211. The adjustment hole 251 is provided on the valve core 21 in a vertical direction of the axis of the valve stem through hole 211. The adjustment hole 251 is a threaded hole. The adjustment hole 251 is connected to the valve stem through hole 211. The screw 252 is screwed in the adjustment hole 251. The screw 252 can abut against the valve stem 23 to lock the relative position of the valve stem 23 and the valve core 21.

[0046] It is understandable that after the relative position of the valve core 21 and the valve stem 23 is determined, the screw 252 is screwed into the adjustment hole 251 and the screw 252 is pressed against the valve stem 23 to complete the relative fixation of the valve core 21 and the valve stem 23. When the inlet and outlet pressure resistance needs to be adjusted, it is only necessary to unscrew the screw 252, adjust the relative position of the valve core 21 and the valve stem 23, and then screw the screw 252 again and press the screw 252 against the valve stem 23, so that any inlet and outlet pressure resistance adjustment can be achieved.

[0047] Reference Figure 5 The stroke adjustment components 25 are provided in a plurality of groups. The plurality of groups of stroke adjustment components 25 are evenly arranged along the circumference of the valve core 21 .

[0048] It is worth noting that, in some embodiments of the present invention, the number of stroke adjustment components 25 can be one group, or two groups, three groups, four groups, etc. The specific number is set by those skilled in the art according to requirements.

[0049] Reference Figures 3 to 5 The valve body 10 is provided with a diaphragm sealing groove 14. The diaphragm 24 is provided with a sealing ring 241. The sealing ring 241 is embedded in the diaphragm sealing groove 14.

[0050] It is worth noting that the diaphragm sealing groove 14 cooperates with the sealing ring 241 to achieve sealing of the environment on both sides of the diaphragm 24 to prevent fluid from entering the valve core assembly 20.

[0051] Reference Figure 3 and Figure 7The end of the valve port 12 close to the diaphragm 24 is provided with a tapered nozzle 121. The side of the diaphragm 24 close to the valve port 12 is provided with a thickened portion 242. The thickened portion 242 abuts against the tapered nozzle 121.

[0052] It is worth mentioning that when the diaphragm valve is closed, the conical nozzle 121 can increase the pressure applied by the valve port 12 on the thickened portion 242, increase the deformation of the thickened portion 242, and thereby ensure that when the diaphragm valve is closed, the flow-blocking effect of the diaphragm 24 can effectively reduce the inlet and outlet pressure resistance provided by the valve core spring 22, thereby reducing the magnetic force that the valve core drive assembly 30 needs to provide, and reducing the heat generated by the valve core drive assembly 30.

[0053] Reference Figure 7 The end surface of the tapered nozzle 121 is a plane. A V-shaped groove 243 is provided on the thickened portion 242. Two edges of the end surface of the tapered nozzle 121 are embedded in the V-shaped groove 243.

[0054] It is worth noting that in some embodiments of the present invention, a V-shaped groove 243 is provided on the thickened portion 242. When the diaphragm valve is closed, the edges of the tapered mouth 121 are squeezed and embedded in the V-shaped groove 243, further enhancing the flow resistance effect of the diaphragm 24. The inlet and outlet pressure resistance provided by the valve core spring 22 can be effectively reduced, thereby reducing the magnetic force that the valve core drive assembly 30 needs to provide, and reducing the heat generated by the valve core drive assembly 30.

[0055] Reference Figure 3 and Figure 5 The valve core assembly 20 further includes a pressing block 26. The pressing block 26 is disposed between the valve core 21 and the valve housing 31. The pressing block 26 is in contact with the diaphragm 24.

[0056] A convex ring 261 is provided on one side of the pressing block 26 close to the diaphragm 24. The convex ring 261 is configured to press against the diaphragm 24 to make the diaphragm 24 more compact.

[0057] It is worth noting that, in some embodiments of the present invention, the valve housing 31 presses against the pressing block 26 , so that the pressing block 26 is tightly attached to the diaphragm 24 , thereby causing the sealing ring 241 to deform, thereby increasing the sealing effect of the sealing ring 241 .

[0058] The diaphragm 24 will swell and become loose after working for a period of time, which will affect the performance. The convex ring 261 can prevent the diaphragm 24 from swelling, make the diaphragm 24 more compact, change the force distribution of the diaphragm 24, and extend the service life of the diaphragm 24.

[0059] Reference Figure 5 , the height of the outer periphery of the convex ring 261 is higher than the height of the inner periphery of the convex ring 261.

[0060] It should be noted that the height of the outer periphery of the convex ring 261 is higher than that of the convex ring 261. The outer ring of the convex ring 261 is high, and pressure can be applied to the outer periphery of the diaphragm 24 as much as possible, while the inner ring of the convex ring 261 is low, because its inner ring is close to the thickened portion 242, and it is necessary to avoid excessive deformation and tearing of the diaphragm 24. The setting of the outer periphery of the convex ring 261 being higher than the inner periphery of the convex ring 261 can, on the one hand, prevent the diaphragm 24 from being torn due to excessive local deformation, and on the other hand, ensure that the diaphragm 24 has a certain displacement, otherwise it will not be sucked up.

[0061] Reference Figure 3 A diaphragm valve also includes a middle shell 40 and a face cover 50. The middle shell 40 is sleeved on the valve core assembly 20 and the valve core drive assembly 30 and connected to the valve body 10. The face cover 50 is buckled at one end of the middle shell 40 and away from the valve body 10. A threading hole is opened on the face cover 50.

[0062] It can be understood that the middle shell 40 is used to protect the valve core assembly 20 and the valve core drive assembly 30, and the surface cover 50 is provided with a threading hole for connecting and protecting the wires.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A diaphragm valve, characterized in that: include: A valve body, a valve core assembly and a valve core drive assembly, wherein the valve core assembly is connected to the valve body, the valve body is provided with an inlet fluid channel, a valve port and an outlet fluid channel, one end of the valve port is connected to the inlet fluid channel, and the other end is connected to the outlet fluid channel, the valve core assembly is used to open or close the valve port, the valve core drive assembly is connected to the valve core assembly, and the valve core drive assembly drives the valve core assembly to open or close the valve port; The valve core drive assembly comprises a valve housing, an electromagnetic coil and a valve cover, wherein the valve housing is connected to the valve body, the electromagnetic coil is arranged in the valve housing, the valve cover is arranged at one end of the valve housing and away from the valve body, and the valve cover is configured to seal the valve housing; The valve core assembly includes a valve core, a valve core spring, a valve stem and a diaphragm. The valve core is movably arranged in the electromagnetic coil along the axial direction of the electromagnetic coil. The valve stem is inserted in the valve core. The valve stem moves with the valve core. One end of the valve core spring abuts against the valve core drive assembly, and the other end abuts against the valve core. The valve core spring is configured to push the valve core close to the valve body. The diaphragm is arranged on the valve body and fits the valve port. The center position of the diaphragm is connected to the end of the valve stem. The valve stem moves to drive the diaphragm to undergo elastic deformation. The electromagnetic coil is configured to attract the valve core away from the valve body after being energized. The valve core drives the valve stem away from the valve body. The valve stem drives the diaphragm to deform and open the valve port. The valve core spring is configured to push the valve core close to the valve body. The valve core drives the valve stem close to the valve body. The valve stem drives the diaphragm to fit and close the valve port. The valve core assembly further comprises a stroke adjustment assembly, which is arranged on the valve core and can adjust the relative position of the valve stem and the valve core; The stroke adjustment assembly includes an adjustment hole and a screw. A valve stem through hole is provided in the valve core. The valve stem is movably inserted in the valve stem through hole. The adjustment hole is opened on the valve core in a vertical direction of the axis of the valve stem through hole. The adjustment hole is a threaded hole. The adjustment hole is connected to the valve stem through hole. The screw is threaded in the adjustment hole. The screw can abut against the valve stem to lock the relative position of the valve stem and the valve core. The valve core assembly further comprises a pressing block, which is arranged between the valve core and the valve housing, and the pressing block is in contact with the diaphragm; A convex ring is provided on one side of the pressing block close to the diaphragm, and the convex ring is configured to press against the diaphragm to make the diaphragm more compact; The height of the outer periphery of the convex ring is higher than the height of the inner periphery of the convex ring.

2. A diaphragm valve according to claim 1, characterized in that: The stroke adjustment components are provided in a plurality of groups, and the plurality of groups of stroke adjustment components are evenly arranged along the circumference of the valve core.

3. A diaphragm valve according to claim 1, characterized in that: A diaphragm sealing groove is provided on the valve body, a sealing ring is provided on the diaphragm, and the sealing ring is embedded in the diaphragm sealing groove.

4. A diaphragm valve according to claim 1, characterized in that: A conical nozzle is arranged at one end of the valve port close to the diaphragm, and a thickened portion is arranged at one side of the diaphragm close to the valve port, and the thickened portion abuts against the conical nozzle.

5. A diaphragm valve according to claim 4, characterized in that: The end surface of the tapered mouth is a plane, the thickened portion is provided with a V-shaped groove, and two edges of the end surface of the tapered mouth are embedded in the V-shaped groove.

6. A diaphragm valve according to claim 1, characterized in that: It also includes a middle shell and a surface cover, wherein the middle shell is sleeved on the valve core assembly and the valve core drive assembly and connected to the valve body, and the surface cover is buckled on one end of the middle shell and away from the valve body, and a threading hole is opened on the surface cover.

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