diaphragm valve

Abstract

This utility model relates to a diaphragm valve, specifically a diaphragm valve that prevents deformation caused by the pressure of the fluid used to actuate the diaphragm, allows for easy replacement of the flow path body according to the required flow rate and piping diameter, and effectively maintains the airtightness of the joint of the flow path body. The diaphragm valve includes: a drive body with a control cylinder internally disposed therein that moves up and down by the fluid; a diaphragm disposed at the lower part of the drive body and actuated by the control cylinder; a reinforcing rib formed in an annular shape along the outer circumferential surface of the drive body to suppress deformation caused by fluid pressure; a flow path body disposed at the lower part of the drive body, controlling the opening and closing of the flow path for fluid flow through the movement of the diaphragm; a fastening part rotatably disposed along the lower outer circumferential surface of the drive body and threadedly fastened to the upper outer circumferential surface of the flow path body; and an annular first airtight member disposed between the fastening part and the flow path body.

Description

Technical Field

[0001] This utility model relates to diaphragm valves, and more specifically, to diaphragm valves that prevent deformation caused by the pressure of the fluid used to actuate the diaphragm, allow easy replacement of the flow path body according to the required flow rate and piping diameter, and effectively maintain the airtightness of the joints of the flow path body. Background Technology

[0002] Valves are commonly used in piping systems and are components that open or close passages to control the flow rate along a piping system. Depending on the opening and closing mechanism, there are ball valves, gate valves, diaphragm valves, and so on.

[0003] Diaphragm valves are valves that use diaphragms to control the flow rate and pressure of fluids in pipelines. Recently, with the development of highly chemically resistant materials, they have become increasingly widely used in pure water, weak / acidic and alkaline chemicals, and slurries such as grinding fluids.

[0004] This diaphragm valve, like the one in Korean Patent No. 10-2312722 "Diaphragm Valve with Key Lock Structure", has a structure that separates the main body for driving the diaphragm and the lower flow path, but it has the problem of frequent water leakage at its joint.

[0005] In addition, there is the following problem: the pressure change of the fluid used to actuate the diaphragm causes deformation of the main body, making it difficult to perform precise opening and closing control.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Korean Patent Registration No. 10-2312722, "Diaphragm Valve with Key Locking Structure" Utility Model Content

[0009] Problems to be solved by the utility model

[0010] The purpose of this invention is to solve the above-mentioned problems by providing a diaphragm valve for preventing deformation caused by the pressure of the fluid used to actuate the diaphragm.

[0011] Another objective of this invention is to provide a diaphragm valve that allows for easy replacement of the flow path body according to the required flow rate and piping diameter, and effectively maintains the airtightness of the joints of the flow path body.

[0012] means for solving problems

[0013] To achieve the above objectives, the diaphragm valve according to this utility model is characterized by comprising: a drive body portion having a control cylinder internally disposed therein that moves up and down by a moving fluid; a diaphragm disposed at the lower part of the drive body portion and operated by the control cylinder; a reinforcing rib portion formed in an annular shape along the outer peripheral surface of the drive body portion to suppress deformation caused by fluid pressure; a flow path body portion disposed at the lower part of the drive body portion, controlling the opening and closing of the flow path supplying fluid by the operation of the diaphragm; a fastening portion rotatably disposed along the lower outer peripheral surface of the drive body portion and threadedly fastened to the upper outer peripheral surface of the flow path body portion; and an annular first airtight member disposed between the fastening portion and the flow path body portion.

[0014] Additionally, the flow path body comprises: a first slot and a second slot, which are formed at predetermined intervals along the lower outer peripheral surface; an O-ring, which is disposed along the first slot and is in close contact with the inner peripheral surface of the flow path body; and a second airtight member, which is disposed along the second slot and is mounted on the fastening part.

[0015] In addition, the feature is that a protruding end is formed in the main body of the flow path, which protrudes upward between the supply flow path formed on one side and the discharge flow path formed on the other side, and the upper surface of the protruding end is configured to be concave so as to be in complete contact with the lower surface of the diaphragm in response to the downward movement of the diaphragm.

[0016] Utility Model Effect

[0017] As described above, the diaphragm valve according to the present invention has an annular reinforcing rib formed along the outer peripheral surface of the drive body portion that supplies the operating fluid, thereby effectively preventing deformation caused by the pressure of the operating fluid.

[0018] Furthermore, the diaphragm valve according to this utility model has the following effects: the flow path main body is detachable from the drive main body, and can be easily replaced with other flow path main bodies according to the required flow rate and the diameter of the piping; and the first airtight member and the second airtight member are arranged at the joint of the flow path main body to effectively maintain airtightness. Attached Figure Description

[0019] Figure 1 This is a perspective view of the diaphragm valve according to the present invention.

[0020] Figure 2 This is a front view of the diaphragm valve according to the present invention.

[0021] Figure 3 This is a longitudinal sectional view of the diaphragm valve according to the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 1: Drive body section;

[0024] 2: Diaphragm;

[0025] 3: Control cylinder;

[0026] 4: Elastic components;

[0027] 5: Airtight components for cylinders;

[0028] 6: Strengthen the ribs;

[0029] 7: Main part of the flow path;

[0030] 8: Fastening parts;

[0031] 9: Guide components;

[0032] 11: First slot;

[0033] 12: Second slot;

[0034] 21: First airtight component;

[0035] 22: Second airtight component;

[0036] 23: O-ring;

[0037] 31: Supply flow path;

[0038] 32: Discharge flow path;

[0039] 33: Protruding end;

[0040] 41: Transparent cover;

[0041] 42: Display unit;

[0042] 51: First chamber;

[0043] 52: Second chamber. Detailed Implementation

[0044] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0045] Figure 1 This is a perspective view of the diaphragm valve according to the present invention. Figure 2 This is a front view of the diaphragm valve according to the present invention. Figure 3 This is a longitudinal sectional view of the diaphragm valve according to the present invention.

[0046] like Figures 1 to 3As shown, the diaphragm valve according to this utility model is divided into a first chamber 51 and a second chamber 52 by a control cylinder 3. The diaphragm valve includes: a drive body 1, which is internally disposed with a control cylinder 3 that moves up and down by fluid supplied to the first chamber 51 and the second chamber 52; a diaphragm 2 disposed at the lower part of the drive body 1 and operated by the control cylinder 3; at least one reinforcing rib 6, which is formed in an annular shape along the outer peripheral surface of the drive body 1 to suppress deformation caused by the pressure of the fluid supplied to the first chamber 51 and the second chamber 52; a flow path body 7 disposed at the lower part of the drive body 1 and controlling the opening and closing of the flow path for fluid flow by the operation of the diaphragm 2; a fastening part 8, which is rotatably disposed along the lower outer peripheral surface of the drive body 1 and threadedly fastened to the upper outer peripheral surface of the flow path body 3; and an annular first airtight member 21 disposed between the fastening part 8 and the flow path body 3.

[0047] At this time, the control cylinder 3 disposed inside the drive body 1 is pressed downward by a predetermined elastic force through the elastic member, and the diaphragm 2 is pressed downward until the operating fluid supplied to the second chamber 52 is above the predetermined pressure, thereby keeping the flow path closed.

[0048] In addition, the control cylinder 3 disposed inside the drive body 1 can also be pressurized upward with a predetermined elastic force by the elastic member, pressurizing the diaphragm 2 upward until the operating fluid supplied to the first chamber 51 reaches a predetermined pressure, thereby keeping the flow path open.

[0049] In addition, a transparent cover is formed on the upper part of the drive body 1, and a display part 42 is arranged inside it, which extends upward from the control cylinder 3, so that the operation and position of the control cylinder 3 can be visually confirmed.

[0050] In addition, the aforementioned flow path main body 7 can be replaced according to the flow rate of the fluid to be controlled and the diameter of the piping.

[0051] In addition, preferably, the main body of the flow path 7 is formed with a protruding end 33, which protrudes upward between the supply flow path 31 formed on one side and the discharge flow path 32 formed on the other side. The upper surface of the protruding end 33 is configured to be concave so that it is in complete contact with the lower surface of the diaphragm 2, which is bulging downwards due to the pressure of the controlled cylinder 3.

[0052] In particular, in order to further improve the airtightness between the drive body 1 and the flow path body 3, the flow path body 3 may be configured to include: a first slot 11 and a second slot 12, which are formed at a predetermined interval along the lower outer peripheral surface; an O-ring, which is disposed along the first slot 11 and is in close contact with the inner peripheral surface of the flow path body 3; and a second airtight member 22, which is disposed along the second slot 12 and is mounted on the fastening part 8.

[0053] Thus, the O-ring 23 arranged along the first slot 11 first maintains the airtightness between the drive body 1 and the flow path body 3, and the first airtight member 21 maintains the airtightness between the fastening part 8 and the flow path body 3.

[0054] Furthermore, considering the characteristics of the fastening part 8 which is tightened by rotation and thread, the second airtight member 22 maintains the airtightness between the fastening part 8 and the drive body part 1. Thus, even in the use environment of corrosive fluids such as pure water, weak / acidic / alkaline drugs, and slurries such as gases or grinding fluids, airtightness can be effectively maintained.

[0055] As described above, the present invention has been described with reference to the accompanying drawings and focusing on preferred embodiments. However, those skilled in the art will recognize that various modifications can be made based on the above description without departing from the scope of the present invention. Therefore, the scope of the present invention should be interpreted according to the described technical solutions to include the various modifications described above.

Claims

1. A diaphragm valve, characterized in that, The diaphragm valve includes: The drive body is equipped with a control cylinder that moves up and down via a fluid. A diaphragm is disposed at the lower part of the drive body and is actuated by a control cylinder; The reinforcing ribs are formed in a ring shape along the outer peripheral surface of the drive body to suppress deformation caused by fluid pressure; The flow path main body is disposed at the lower part of the drive main body, and controls the opening and closing of the flow path for supplying fluid by the action of the diaphragm; A fastening part, rotatably disposed along the lower outer peripheral surface of the drive body, is threadedly fastened to the upper outer peripheral surface of the flow path body; and A first airtight component in the shape of an annulus is disposed between the fastening part and the flow path body part.

2. The diaphragm valve according to claim 1, characterized in that, The main body of the flow path includes: The first slot and the second slot are formed at predetermined intervals along the lower outer peripheral surface; An O-ring, which is disposed along the first slot and is in close contact with the inner circumferential surface of the flow path body; and The second airtight member is disposed along the second slot and is mounted on the fastener.

3. The diaphragm valve according to claim 1, characterized in that, A protruding end is formed in the main body of the flow path, which protrudes upward between the supply flow path formed on one side and the discharge flow path formed on the other side. The upper surface of the protruding end is configured to be concave so that it is in complete contact with the lower surface of the diaphragm in response to the downward movement of the diaphragm.

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