Anti-scratch diaphragm valve

Abstract

The utility model relates to the technical field of diaphragm valves, in particular to an anti-scratch diaphragm valve, which is characterized in that a valve main body is arranged on a pipeline, the on-off of a water body in the valve main body is controlled through a control mechanism, and the opening and closing conditions of the valve are indicated through an indicating mechanism, so that the practicability of the anti-scratch diaphragm valve is improved; comprising a valve body; the valve further comprises a control mechanism and an indicating mechanism, and the control mechanism and the indicating mechanism are both installed on the valve body. The valve body is matched with the control mechanism to control on-off of water, and the indicating mechanism indicates opening and closing conditions of the valve.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm valves, and in particular to anti-scratch diaphragm valves. Background Technology

[0002] A diaphragm valve consists of a flexible diaphragm or a combination of diaphragms installed within the valve body and valve cover. Its closing element is a compression device connected to the diaphragm. The advantage of a diaphragm valve is that its operating mechanism is isolated from the media circuit, ensuring the purity of the working medium and preventing the possibility of media in the pipeline impacting the working parts of the operating mechanism. Existing diaphragm valves, such as the one disclosed in utility model patent CN218094378U and the one disclosed in utility model patent CN202691134U, can all control the flow of water.

[0003] However, during use, it was found that the stem nuts of civilian straight-through diaphragm valves are generally assembled using an interference fit method, which usually does not cause problems under normal use. However, straight-through diaphragm valves used in nuclear power plants require an O-ring seal at the valve stem. This seal has a tighter contact with the valve stem and is closer to the T-thread of the valve stem. This creates a certain degree of over-positioning, which may lead to abrasion of the valve stem. Abrasion of the valve stem may even cause the valve stem nut to fall off, resulting in the valve losing its function. Therefore, there is an urgent need for a diaphragm valve that prevents abrasion and addresses these issues. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an anti-scratch diaphragm valve that installs the valve body on the pipeline, controls the flow of water in the valve body through a control mechanism, and indicates the opening and closing status of the valve through an indicator mechanism, thereby improving the practicality of the anti-scratch diaphragm valve.

[0005] The anti-scratch diaphragm valve of this utility model includes a valve body; it also includes a control mechanism and an indicating mechanism, both of which are mounted on the valve body;

[0006] The valve body, in conjunction with the control mechanism, controls the flow of water, while the indicator mechanism indicates the opening and closing status of the valve.

[0007] The valve body is installed on the pipeline, and the flow of water in the valve body is controlled by the control mechanism. The opening and closing status of the valve is indicated by the indicator mechanism, thereby improving the practicality of the anti-scratch diaphragm valve.

[0008] Preferably, the valve body includes a valve body, a valve cover, bolts, and nuts. The valve cover is installed on the top of the valve body by bolts and nuts, and a sealing screw is provided on the valve cover. An O-ring seal is provided between the sealing screw and the valve cover, and a washer is provided between the nuts and the valve body. Water flows through the valve body, and the flow of water in the valve body is controlled by a control mechanism, thereby improving the practicality of the anti-scratch diaphragm valve.

[0009] Preferably, the control mechanism includes an anti-scratch mechanism, a diaphragm, a valve stem, a handwheel, a nut, and a diaphragm head. The anti-scratch mechanism is installed on the top of the valve cover. The valve stem is threaded into the anti-scratch mechanism, and the bottom of the valve stem extends below the anti-scratch mechanism. The handwheel is installed on the top of the valve stem via a nut, and a washer is provided between the handwheel and the nut. The diaphragm head is installed on the bottom of the valve stem, and a thrust washer is provided between the diaphragm head and the valve stem. The diaphragm is installed between the valve body and the valve cover, and the diaphragm head is located above the diaphragm. By rotating the handwheel forward, the valve stem drives the diaphragm head downward to press the diaphragm, blocking the interior of the valve body and stopping the water flow. Alternatively, by rotating the handwheel in the reverse direction, the diaphragm head resets, allowing the water to continue flowing through the valve body, thereby improving the practicality of the anti-scratch diaphragm valve.

[0010] Preferably, the anti-scratch mechanism includes a valve stem nut, a set screw, a sealing seat, a second O-ring, and a third O-ring. The valve stem has threads on its middle section and the top of the valve cover's inner wall. The valve stem nut is threaded onto the top of the valve cover and fixed by the set screw. The middle section of the valve stem is threadedly connected to the valve stem nut. The sealing seat is fitted onto the bottom of the valve stem and is located below the valve stem nut. The sealing seat mates with the guide surface of the valve stem. The sealing seat can only float radially with the valve stem. Both the second and third O-rings are mounted on the sealing seat. By inserting the valve stem nut into the upper part of the valve cover and connecting it to the valve cover using threads, while simultaneously fixing the valve stem nut with the set screw, and then using a floating sealing seat, and pressing the sealing seat with the valve stem nut, scratches between the sealing seat and the valve stem are prevented, thereby improving the practicality of the anti-scratch diaphragm valve.

[0011] Preferably, the interior of the valve cover is an open structure; it will not impede the radial movement of the sealing seat.

[0012] Preferably, the indicating mechanism includes an indicating rod, a second nut, an indicating plate, and a retaining ring. The indicating rod is mounted on the valve cover via the second nut, and the indicating plate is rotatably mounted on the valve stem via the retaining ring. The indicating plate has a through hole, and the top of the indicating rod is located in the through hole of the indicating plate. During valve stem transmission, the indicating plate rises or falls together with the valve stem, making it convenient for operators to judge the position of the diaphragm head and then judge the on / off state of the valve body, thereby improving the practicality of the anti-scratch diaphragm valve.

[0013] Preferably, the bottom end of the sealing seat is provided with an end face sealing groove, the bottom of the inner wall of the sealing seat is provided with a valve stem sealing groove, and the top of the sealing seat is provided with a lifting ring hole; the end face sealing groove limits the O-ring three, the valve stem sealing groove limits the O-ring two, and the lifting ring hole facilitates the installation and disassembly of the sealing seat, thereby improving the practicality of the anti-scratch diaphragm valve.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the valve stem nut is installed from the top of the valve cover, connected to the valve cover by threads, and fixed with a set screw. The valve stem seal is not directly set on the valve cover, but adopts the form of a floating seal seat. The floating seal seat is set below the valve stem nut, and is pressed vertically by the valve stem nut. It does not contact the valve cover radially, and can float with the valve core, eliminating the scratches between the seal seat and the valve stem. Secondly, the entire valve maintains the same main structure as a regular diaphragm valve, and there are no special requirements for the processing technology. The cost will not increase significantly, thereby improving the overall reliability and practicality of the valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first isometric structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the second isometric structure of this utility model;

[0017] Figure 3 This is a front view cross-sectional structural diagram of the present invention;

[0018] Figure 4 This is a front enlarged structural diagram of the valve stem nut and sealing seat of this utility model;

[0019] Figure 5 This is an isometric structural diagram of the sealing seat of this utility model.

[0020] The following are labels in the attached diagram: 1. Valve body; 2. Valve cover; 3. Sealing screw; 4. O-ring one; 5. Diaphragm; 6. Valve stem; 7. Handwheel; 8. Nut one; 9. Washer one; 10. Diaphragm head; 11. Thrust washer; 12. Valve stem nut; 13. Set screw; 14. Sealing seat; 15. O-ring two; 16. O-ring three; 17. Indicator rod; 18. Nut two; 19. Indicator plate; 20. Retaining ring; 21. End face sealing groove; 22. Valve stem sealing groove; 23. Lifting eye hole; 24. Bolt; 25. Nut three; 26. Washer two. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0022] like Figures 1 to 5 As shown, the anti-scratch diaphragm valve includes a valve body; it also includes a control mechanism and an indicating mechanism, both of which are mounted on the valve body.

[0023] The valve body, in conjunction with the control mechanism, controls the flow of water, while the indicator mechanism indicates the opening and closing status of the valve.

[0024] The valve body includes a valve body 1, a valve cover 2, bolts 24 and nuts 25. The valve cover 2 is installed on the top of the valve body 1 by bolts 24 and nuts 25, and a sealing screw 3 is provided on the valve cover 2. An O-ring 4 is provided between the sealing screw 3 and the valve cover 2, and a washer 26 is provided between the nut 25 and the valve body 1.

[0025] The control mechanism includes an anti-scratch mechanism, a diaphragm 5, a valve stem 6, a handwheel 7, a nut 8, and a diaphragm head 10. The anti-scratch mechanism is installed on the top of the valve cover 2. The valve stem 6 is threaded into the anti-scratch mechanism, and the bottom of the valve stem 6 extends below the anti-scratch mechanism. The handwheel 7 is installed on the top of the valve stem 6 via the nut 8, and a washer 9 is provided between the handwheel 7 and the nut 8. The diaphragm head 10 is installed on the bottom of the valve stem 6, and a thrust washer 11 is provided between the diaphragm head 10 and the valve stem 6. The diaphragm 5 is installed between the valve body 1 and the valve cover 2, and the diaphragm head 10 is located above the diaphragm 5.

[0026] The anti-scratch mechanism includes a valve stem nut 12, a set screw 13, a sealing seat 14, an O-ring seal 15, and an O-ring seal 16. The valve stem 6 has threads on its middle section and the top of the inner wall of the valve cover 2. The valve stem nut 12 is threaded onto the top of the valve cover 2 and fixed by the set screw 13. The middle section of the valve stem 6 is threadedly connected to the valve stem nut 12. The sealing seat 14 is fitted onto the bottom of the valve stem 6 and is located below the valve stem nut 12. The sealing seat 14 mates with the guide surface of the valve stem 6. The sealing seat 14 can only float radially with the valve stem 6. The O-ring seal 15 and the O-ring seal 16 are both installed on the sealing seat 14.

[0027] The interior of the valve cover 2 is a hollow structure;

[0028] The indicating mechanism includes an indicating rod 17, a second nut 18, an indicating plate 19, and a retaining ring 20. The indicating rod 17 is mounted on the valve cover 2 via the second nut 18, and the indicating plate 19 is rotatably mounted on the valve stem 6 via the retaining ring 20. A through hole is provided on the upper part of the indicating plate 19, and the top of the indicating rod 17 is located in the through hole of the indicating plate 19.

[0029] The bottom end of the sealing seat 14 is provided with an end face sealing groove 21, the bottom of the inner wall of the sealing seat 14 is provided with a valve stem sealing groove 22, and the top of the sealing seat 14 is provided with a lifting ring hole 23.

[0030] By rotating the handwheel 7 in the forward direction, the valve stem 6 drives the diaphragm head 10 to press the diaphragm 5 downward, thus blocking the interior of the valve body 1 and stopping the water flow. Alternatively, rotating the handwheel 7 in the reverse direction resets the diaphragm head 10, allowing the water to continue flowing through the valve body 1. Simultaneously, the valve stem nut 12 is inserted into the upper part of the valve cover 2 and connected to the valve cover 2 by threads. The valve stem nut 12 is then fixed by the set screw 13. A floating sealing seat 14 is then used, and the valve stem nut 12 presses the sealing seat 14 to prevent scratches between the sealing seat and the valve stem. During the operation of the valve stem 6, the indicator plate 19 rises or falls with the valve stem 6, making it convenient for operators to judge the position of the diaphragm head 10 and thus determine the on / off status of the valve body 1, thereby improving the practicality of the anti-scratch diaphragm valve.

[0031] The valve body 1 and valve cover 2 of the anti-scratch diaphragm valve of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An anti-scratch diaphragm valve, comprising a valve body; characterized in that, It also includes a control mechanism and an indicator mechanism, both of which are mounted on the valve body; The valve body, in conjunction with the control mechanism, controls the flow of water, while the indicator mechanism indicates the opening and closing status of the valve. The valve body includes a valve body (1), a valve cover (2), bolts (24) and nuts (25). The valve cover (2) is installed on the top of the valve body (1) by bolts (24) and nuts (25). A sealing screw (3) is provided on the valve cover (2). An O-ring (4) is provided between the sealing screw (3) and the valve cover (2). A washer (26) is provided between the nuts (25) and the valve body (1). The control mechanism includes an anti-scratch mechanism, a diaphragm (5), a valve stem (6), a handwheel (7), a nut (8), and a diaphragm head (10). The anti-scratch mechanism is installed on the top of the valve cover (2). The valve stem (6) is threaded into the anti-scratch mechanism, and the bottom of the valve stem (6) extends to the bottom of the anti-scratch mechanism. The handwheel (7) is installed on the top of the valve stem (6) through the nut (8), and a washer (9) is provided between the handwheel (7) and the nut (8). The diaphragm head (10) is installed on the bottom of the valve stem (6), and a thrust washer (11) is provided between the diaphragm head (10) and the valve stem (6). The diaphragm (5) is installed between the valve body (1) and the valve cover (2), and the diaphragm head (10) is located above the diaphragm (5). The anti-scratch mechanism includes a valve stem nut (12), a set screw (13), a sealing seat (14), an O-ring seal two (15), and an O-ring seal three (16). The middle part of the valve stem (6) and the top of the inner wall of the valve cover (2) are both provided with threads. The valve stem nut (12) is threadedly installed on the top of the valve cover (2) and is fixed by the set screw (13). The middle part of the valve stem (6) is threadedly connected to the valve stem nut (12). The sealing seat (14) is fitted on the bottom of the valve stem (6) and is located below the valve stem nut (12). The sealing seat (14) cooperates with the guide surface of the valve stem (6). The sealing seat (14) can only float radially with the valve stem (6). The O-ring seal two (15) and the O-ring seal three (16) are both installed on the sealing seat (14).

2. The anti-scratch diaphragm valve as described in claim 1, characterized in that, The interior of the valve cover (2) is an open structure.

3. The anti-scratch diaphragm valve as described in claim 1, characterized in that, The indicating mechanism includes an indicator rod (17), a second nut (18), an indicator plate (19), and a retaining ring (20). The indicator rod (17) is installed on the valve cover (2) by the second nut (18), and the indicator plate (19) is rotatably installed on the valve stem (6) by the retaining ring (20). A through hole is provided on the indicator plate (19), and the top of the indicator rod (17) is located in the through hole of the indicator plate (19).

4. The anti-scratch diaphragm valve as described in claim 1, characterized in that, The bottom end of the sealing seat (14) is provided with an end face sealing groove (21), the bottom of the inner wall of the sealing seat (14) is provided with a valve stem sealing groove (22), and the top of the sealing seat (14) is provided with a lifting ring hole (23).

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