A sealing diaphragm for a pneumatic diaphragm valve

Abstract

This utility model discloses a sealing diaphragm for a pneumatic diaphragm valve, relating to the technical field of diaphragm sealing diaphragms. The sealing diaphragm includes a corrosion-resistant rubber sheet, a sealing connecting piece on the outer side of the rubber sheet, and a sleeve fixedly connected to one side of the rubber sheet. A connecting rod is slidably connected within the sleeve, with a threaded end on the connecting rod outside the sleeve. A fixing mechanism for fixing the connecting rod is provided within the sleeve, and a limiting component for limiting the fixing mechanism is provided on the sleeve. By setting up the fixing mechanism, the connecting rod is fixed using the engagement of a locking block and locking teeth, replacing the traditional bolt fixing method, reducing friction and wear, and avoiding the problem of fixing failure after long-term use. The limiting component effectively limits the fixing mechanism, ensuring the stability of the fixing. Reinforcing ribs improve the strength of the corrosion-resistant rubber sheet, and the chromium carbide-nickel-chromium coating enhances the wear resistance and corrosion resistance of the rubber sheet, extending the service life of the sealing diaphragm.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm sealing diaphragm technology, specifically a sealing diaphragm for a pneumatic diaphragm valve. Background Technology

[0002] A diaphragm valve is a gate valve that uses a diaphragm as the opening and closing element to close the flow channel, cut off the fluid, and separate the valve body cavity from the valve cover cavity. It has a simple structure, good sealing and corrosion resistance, and low fluid resistance. It is used for low-pressure, low-temperature, highly corrosive media and media containing suspended substances. The diaphragm is usually made of elastic, corrosion-resistant, and non-permeable materials such as rubber and plastic. When using a diaphragm valve, the diaphragm needs to be compressed to deform it and complete the opening and closing of the flow channel.

[0003] The prior art CN222046710U discloses a pneumatic diaphragm valve diaphragm, including a connecting assembly, a diaphragm body and a bottom sealing ring. The diaphragm body is composed of an outer rectangular connecting diaphragm, an inner arc-shaped movable diaphragm, a top reinforcing ring and a bottom reinforcing ring, and is fixed by tightening the locking bolt against the smooth section surface of the connecting screw.

[0004] However, the following shortcomings still exist in actual use: the diaphragm valve needs to be opened and closed frequently. During this process, friction will occur continuously between the locking bolt and the smooth section of the connecting screw. After long-term use, wear is likely to occur, which will lead to fixation failure and affect the normal operation of the diaphragm valve.

[0005] Based on this, a sealing diaphragm for a pneumatic diaphragm valve is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0006] The purpose of this invention is to provide a sealing diaphragm for a pneumatic diaphragm valve to solve the problems in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A sealing diaphragm for a pneumatic diaphragm valve includes a corrosion-resistant rubber sheet, a sealing connecting piece on the outer side of the corrosion-resistant rubber sheet, a sleeve fixedly connected to one side of the corrosion-resistant rubber sheet, a connecting rod slidably connected in the sleeve, a threaded end of the connecting rod outside the sleeve, a fixing mechanism for fixing the connecting rod in the sleeve, and a limiting component for limiting the fixing mechanism on the sleeve.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative embodiment: the fixing mechanism includes four locking blocks, which are slidably connected in corresponding grooves on the inner wall of the sleeve. The connecting rod has multiple rows of locking teeth corresponding to the locking blocks at one end inside the sleeve. Each locking block is fixedly connected to one end of a spring, and the other end of the spring is connected to the inner wall of the groove. Each locking block is rotatably connected to one end of a pulling rod, and the other end of the pulling rod extends out of the sleeve. The outer end of the pulling rod is provided with a fixing cylinder, which is fixedly connected to the outer wall of the sleeve. The fixing cylinder has two U-shaped grooves, and the outer wall of the pulling rod has two limiting rods, which are slidably connected in the U-shaped grooves.

[0011] In one alternative: the limiting component includes four sliding rings, which are slidably connected to the fixed cylinder. One side of each sliding ring has two grooves corresponding to the limiting rod. The other side of each sliding ring is fixedly connected to one end of a second spring, and the other end of the second spring is fixedly connected to a fixed ring, which is fixedly connected to the fixed cylinder.

[0012] In one alternative: the four blocks are evenly distributed on the sleeve.

[0013] In one alternative: the sleeve is provided with a rubber tight-fitting ring, which is in contact with the surface of the connecting rod.

[0014] In one alternative: mounting holes are provided at all four corners of the sealing connector.

[0015] In one alternative: the anti-corrosion rubber sheet is provided with reinforcing ribs on the side away from the sleeve.

[0016] In one alternative: the outer surface of the corrosion-resistant rubber sheet is coated with a chromium carbide-nickel chromium coating.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model uses a fixing mechanism to fix the connecting rod by engaging the locking blocks and locking teeth, replacing the traditional bolt fixing method. This reduces friction and wear, and avoids the problem of fixing failure after long-term use. At the same time, the limiting component can effectively limit the fixing mechanism, ensuring the stability of the fixation. The reinforcing ribs improve the strength of the anti-corrosion rubber sheet, and the chromium carbide-nickel-chromium coating enhances the wear resistance and corrosion resistance of the anti-corrosion rubber sheet, extending the service life of the sealing diaphragm. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure at point A of this utility model.

[0021] Figure 3 This is a schematic diagram of the reinforcing rib of this utility model.

[0022] Figure 4 This is a cross-sectional view of the present invention.

[0023] Figure 5 This is a schematic diagram of the structure at point B of this utility model.

[0024] Figure 6 This is a schematic diagram of the limiting component of this utility model.

[0025] Figure reference numerals: 100, anti-corrosion rubber sheet; 101, sleeve; 102, connecting rod; 103, thread; 200, sealing connecting piece; 301, locking block; 302, sliding groove; 303, locking tooth; 304, spring one; 305, pulling rod; 306, fixed cylinder; 307, U-shaped sliding groove; 308, limiting rod; 401, sliding ring; 402, groove; 403, spring two; 404, fixed ring; 500, rubber tight ring; 600, mounting hole; 700, reinforcing rib. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] In one embodiment, such as Figures 1-6 As shown, a sealing diaphragm of a pneumatic diaphragm valve includes a corrosion-resistant rubber sheet 100. A sealing connecting piece 200 is provided on the outer side of the corrosion-resistant rubber sheet 100. A sleeve 101 is fixedly connected to one side of the corrosion-resistant rubber sheet 100. A connecting rod 102 is slidably connected in the sleeve 101. The end of the connecting rod 102 located outside the sleeve 101 is provided with a thread 103. A fixing mechanism for fixing the connecting rod 102 is provided in the sleeve 101. A limiting component for limiting the fixing mechanism is provided on the sleeve 101. The connecting rod 102 is connected to an external driving mechanism through the thread 103, which drives the corrosion-resistant rubber sheet 100 to deform and realize the opening and closing of the flow channel. When the extension length of the connecting rod 102 is adjusted by the fixing mechanism, the limiting component can effectively limit the fixing mechanism, ensuring the stability of the fixation.

[0028] In this embodiment, as Figure 2 , Figure 4 and Figure 5As shown, the fixing mechanism includes four locking blocks 301, which are slidably connected in corresponding grooves 302 on the inner wall of the sleeve 101. One end of the connecting rod 102 located inside the sleeve 101 has multiple rows of locking teeth 303 corresponding to the locking blocks 301. One end of a spring 304 is fixedly connected to each locking block 301, and the other end of the spring 304 is connected to the inner wall of the groove 302. One end of a pulling rod 305 is rotatably connected to each locking block 301, and the other end of the pulling rod 305 extends out of the sleeve 101. A fixing cylinder 306 is provided at the outer end of the pulling rod 305, which is fixedly connected to the outer wall of the sleeve 101. The fixing cylinder 306 has two U-shaped grooves 307, and two limiting rods 308 are provided on the outer wall of the pulling rod 305. The limiting rods 308 slide... The connecting rod 102 is dynamically connected in the U-shaped slide groove 307. Under the elastic force of the spring 304, the locking block 301 engages with the locking tooth 303, thereby fixing the connecting rod 102 in the current position. When it is necessary to adjust the position of the connecting rod 102, first rotate the pull rod 305, then pull the pull rod 305, and then rotate the pull rod 305 again, so that the limiting rod 308 moves along the U-shaped slide groove 307. The pull rod 305 drives the locking block 301 to move away from the locking tooth 303, compressing the spring 304 and separating the locking block 301 from the locking tooth 303. At this time, the connecting rod 102 can be slid. After adjusting to the appropriate position, the pull rod 305 is reset. Under the action of the spring 304, the locking block 301 re-engages with the locking tooth 303, and the limiting rod 308 slides to the corresponding position in the U-shaped slide groove 307, which can fix the position of the locking block 301.

[0029] In one embodiment, such as Figure 2 and Figure 6 As shown, the limiting component includes four sliding rings 401, which are slidably connected to the fixed cylinder 306. One side of each sliding ring 401 has two grooves 402 corresponding to the limiting rod 308. The other side of each sliding ring 401 is fixedly connected to one end of a second spring 403, and the other end of the second spring 403 is fixedly connected to a fixed ring 404, which is fixedly connected to the fixed cylinder 306. Under the elastic force of the second spring 403, the grooves 402 on the sliding ring 401 engage with the limiting rod 308, preventing the limiting rod 308 from sliding left or right, thus limiting the limiting rod 308 and preventing it from sliding accidentally during operation, ensuring the stability of the fixing mechanism.

[0030] In one embodiment, such as Figure 1 As shown, the four locking blocks 301 are evenly distributed on the sleeve 101. The multiple evenly distributed locking blocks engage with the locking teeth 303 at the same time, which can increase the contact area and the overall locking force, making the connecting rod 102 more firmly fixed.

[0031] In one embodiment, such as Figure 4 As shown, the sleeve 101 is provided with a rubber tight ring 500 inside. The rubber tight ring 500 is in contact with the surface of the connecting rod 102. The rubber tight ring 500 has good elasticity and sealing performance. It is in close contact with the surface of the connecting rod 102 and can effectively fill the gap between the sleeve 101 and the connecting rod 102 to prevent the connecting rod 102 from loosening.

[0032] In one embodiment, such as Figure 1 As shown, the sealing connecting piece 200 has mounting holes 600 at each of its four corners. The mounting holes 600 facilitate the fixing of the sealing diaphragm to the valve body by bolts passing through the mounting holes 600 during valve body assembly.

[0033] In one embodiment, such as Figure 3 As shown, the anti-corrosion rubber sheet 100 is provided with a reinforcing rib 700 on the side away from the sleeve 101, which improves the structural strength of the anti-corrosion rubber sheet 100 and reduces its damage during frequent deformation.

[0034] In one embodiment, such as Figure 1 As shown, the outer surface of the anti-corrosion rubber sheet 100 is coated with a chromium carbide-nickel chromium coating, which enhances the wear resistance and corrosion resistance of the anti-corrosion rubber sheet 100 and extends its service life.

[0035] The above embodiment discloses a sealing diaphragm for a pneumatic diaphragm valve. When installing the sealing diaphragm, it is fixed in place via the mounting hole 600 on the sealing connecting piece 200. The connecting rod 102 is connected to an external drive mechanism via a thread 103. When it is necessary to adjust the extension length of the connecting rod 102, the sliding ring 401 is pulled, compressing the second spring 403, causing the limiting rod 308 to separate from the groove 402. Then, the pulling rod 305 is rotated first, then pulled, and then rotated again, causing the limiting rod 308 to move along the U-shaped sliding groove 307. The pulling rod 305 drives the locking block 301 away from the groove. The movement of the locking tooth 303 compresses the first spring 304, causing the locking block 301 to separate from the locking tooth 303. At this time, the sliding connecting rod 102 can be slidable. After adjusting to the appropriate position, the pulling rod 305 is reset. Under the action of the first spring 304, the locking block 301 re-engages with the locking tooth 303, and the limiting rod 308 slides to the corresponding position in the U-shaped slide groove 307. At the same time, the sliding ring 401 limits the limiting rod 308 under the action of the second spring 403. During operation, the connecting rod 102 drives the anti-corrosion rubber sheet 100 to deform and realize the opening and closing of the flow channel. The coordinated action of each component ensures the normal operation and service life of the sealing diaphragm.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sealing diaphragm for a pneumatic diaphragm valve, comprising a corrosion-resistant rubber sheet (100), characterized in that, A sealing connecting piece (200) is provided on the outside of the anti-corrosion rubber sheet (100). A sleeve (101) is fixedly connected to one side of the anti-corrosion rubber sheet (100). A connecting rod (102) is slidably connected in the sleeve (101). One end of the connecting rod (102) located outside the sleeve (101) is provided with a thread (103). A fixing mechanism for fixing the connecting rod (102) is provided in the sleeve (101). A limiting component for limiting the fixing mechanism is provided on the sleeve (101).

2. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that, The fixing mechanism includes four locking blocks (301), which are slidably connected in corresponding grooves (302) on the inner wall of the sleeve (101). One end of the connecting rod (102) inside the sleeve (101) has multiple rows of locking teeth (303) corresponding to the locking blocks (301). One end of a spring (304) is fixedly connected to each locking block (301), and the other end of the spring (304) is connected to the inner wall of the groove (302). Rotate one end of the connecting rod (305), and the other end of the connecting rod (305) extends out of the sleeve (101). The outer end of the connecting rod (305) is provided with a fixed cylinder (306), which is fixedly connected to the outer wall of the sleeve (101). The fixed cylinder (306) is provided with two U-shaped grooves (307), and the outer wall of the connecting rod (305) is provided with two limiting rods (308), which are slidably connected in the U-shaped grooves (307).

3. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that, The limiting component includes four sliding rings (401), which are slidably connected to the fixed cylinder (306). One side of the sliding ring (401) is provided with two grooves (402) corresponding to the limiting rod (308). The other side of the sliding ring (401) is fixedly connected to one end of the second spring (403), and the other end of the second spring (403) is fixedly connected to the fixed ring (404), which is fixedly connected to the fixed cylinder (306).

4. The sealing diaphragm of a pneumatic diaphragm valve according to claim 2, characterized in that, The four locking blocks (301) are evenly distributed on the sleeve (101).

5. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that, The sleeve (101) is provided with a rubber tight ring (500) inside, and the rubber tight ring (500) is in contact with the surface of the connecting rod (102).

6. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that, The sealing connecting piece (200) has mounting holes (600) at all four corners.

7. The sealing diaphragm of a pneumatic diaphragm valve according to claim 3, characterized in that, The anti-corrosion rubber sheet (100) has a reinforcing rib (700) on the side away from the sleeve (101).

8. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that, The outer surface of the anti-corrosion rubber sheet (100) is coated with a chromium carbide-nickel chromium coating.

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