Sealing diaphragm of pneumatic diaphragm valve

Abstract

The utility model provides a sealing diaphragm of a pneumatic diaphragm valve, which comprises a main body part, a first internal thread cylinder is fixedly connected above the main body part, an inner cavity of the first internal thread cylinder is communicated with an inner cavity of the main body part, the lower end of the first internal thread cylinder is fixedly connected with a second internal thread cylinder, and a first external thread column is screwed in the second internal thread cylinder. A sleeving column is fixedly connected to the lower end of the first external threaded column, a sealing plug is connected to the annular side face of the sleeving column in a sleeving mode, a threaded groove is formed in the lower portion of the sleeving column, and a second external threaded column is connected into the threaded groove in a threaded mode; by means of the design, the problems that an original device has a common fastening effect on a sealing plug structure, is inconvenient to disassemble and is not beneficial to replacement and maintenance are solved, the structure is reasonable, practicability is good, the fastening effect on the sealing plug is further improved through a thread structure, and disassembly and use are convenient.

Description

Technical Field

[0001] The utility model relates to a sealing diaphragm of a pneumatic diaphragm valve, belonging to the technical field of sealing diaphragms. Background Art

[0002] The structure of diaphragm valve is quite different from that of general valves. It is a new type of valve and a special type of shut-off valve. Its opening and closing parts are a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving components. It is now widely used in various fields. Commonly used diaphragm valves include rubber-lined diaphragm valves, fluorine-lined diaphragm valves, unlined diaphragm valves, and plastic diaphragm valves.

[0003] Chinese patent number: CN219345562U, mentions an anti-corrosion sealing diaphragm for a diaphragm valve, which is sealed by inserting a sealing plug into the inner cavity and contacting and rubbing the main body through multiple gaskets to avoid leakage as much as possible. The sealing plug is made of corrosion-resistant perfluoroether rubber, which has good corrosion resistance. This can improve the corrosion resistance and stability of the diaphragm, and further seal it through multiple gaskets. However, this device has a general fastening effect on the sealing plug structure, and is not convenient to remove, which is not conducive to replacement and maintenance. Now there is an urgent need for a sealing diaphragm for a pneumatic diaphragm valve to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a sealing diaphragm for a pneumatic diaphragm valve to solve the problems raised in the above-mentioned background technology. The utility model has a reasonable structure and good practicality. The threaded structure is used to further improve the fastening effect of the sealing plug, and it is easy to disassemble and use.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a sealing diaphragm of a pneumatic diaphragm valve, including a main body, a first internally threaded cylinder is fixedly connected to the top of the main body, the inner cavity of the first internally threaded cylinder is connected to the inner cavity of the main body, a second internally threaded cylinder is fixedly connected to the lower end of the first internally threaded cylinder, a first externally threaded column is screwed inside the second internally threaded cylinder, a sleeve column is fixedly connected to the lower end of the first externally threaded column, a sealing plug is sleeved on the annular side of the sleeve column, a threaded groove is provided below the sleeve column, a second externally threaded column is screwed inside the threaded groove, a diaphragm body is fixedly sleeved on the lower end of the main body, L-shaped plates are symmetrically installed below the sealing plug, and first threaded holes are respectively penetrated above the horizontal sections of the relative outer ends of the two L-shaped plates.

[0006] Furthermore, second threaded holes are symmetrically provided below the sealing plug, and two second threaded holes are respectively aligned with the two first threaded holes.

[0007] Furthermore, fastening bolts are respectively threaded into the two first threaded holes.

[0008] Furthermore, a compression plate is fixedly connected to the lower end of the second external thread column, and a sealing ring is installed at the connecting portion between the second external thread column and the thread groove.

[0009] Furthermore, the compression sheet is made of rubber material.

[0010] Furthermore, the outer surface of the diaphragm body is coated with a chromium carbide-nickel-chromium coating.

[0011] The beneficial effects of the utility model: the sealing diaphragm of the pneumatic diaphragm valve of the utility model is added with a first internal threaded cylinder, a clamping plate, a fastening bolt, a sealing ring, a sealing plug, a second internal threaded cylinder, a first external threaded column, a sleeve column, a second external threaded column and an L-shaped plate. Our design improvement and actual use have shown that the device has a reasonable structure and good practicality. The threaded structure is used to further improve the fastening effect of the sealing plug, and it is easy to disassemble and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0013] Figure 1 It is a schematic diagram of a first overall structure of a sealing diaphragm of a pneumatic diaphragm valve of the utility model;

[0014] Figure 2 It is a schematic three-dimensional diagram of a second overall structure of a sealing diaphragm of a pneumatic diaphragm valve of the utility model;

[0015] Figure 3 It is a three-dimensional schematic diagram of the installation position structure of the second external thread column of the sealing diaphragm of a pneumatic diaphragm valve of the utility model;

[0016] Figure 4 It is a three-dimensional schematic diagram of the cross-sectional structure of a sealing diaphragm of a pneumatic diaphragm valve of the utility model;

[0017] Figure 5 The utility model is a three-dimensional schematic diagram of the L-shaped plate installation position structure of the sealing diaphragm of the pneumatic diaphragm valve.

[0018] In the figure: 1-main body, 2-diaphragm body, 3-first internal threaded tube, 4-pressure plate, 5-fastening bolt, 6-sealing ring, 7-sealing plug, 8-second internal threaded tube, 9-first external threaded column, 10-sleeve column, 11-second external threaded column, 12-threaded groove, 13-first threaded hole, 14-second threaded hole, 15-L-type plate. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figure 1-Figure 5 The utility model provides a technical solution: a sealing diaphragm of a pneumatic diaphragm valve, comprising a main body 1, a first internally threaded tube 3 is fixedly connected to the top of the main body 1, the inner cavity of the first internally threaded tube 3 is communicated with the inner cavity of the main body 1, a second internally threaded tube 8 is fixedly connected to the lower end of the first internally threaded tube 3, a first externally threaded column 9 is screwed inside the second internally threaded tube 8, a sleeve column 10 is fixedly connected to the lower end of the first externally threaded column 9, a sealing plug 7 is sleeved on the annular side of the sleeve column 10, a thread groove 12 is provided below the sleeve column 10, a second externally threaded column 11 is screwed inside the thread groove 12, a diaphragm body 2 is fixedly sleeved on the lower end of the main body 1, an L-shaped plate 15 is symmetrically installed below the sealing plug 7, and first threaded holes 13 are respectively penetrated above the horizontal sections of the two L-shaped plates 15 at the relative outer ends. This design solves the problem that the original device has a general fastening effect on the sealing plug structure, is inconvenient to remove, and is not conducive to replacement and maintenance.

[0021] As the first embodiment of the utility model: the second threaded holes 14 are symmetrically opened below the sealing plug 7, and the two second threaded holes 14 are respectively aligned with the two first threaded holes 13. By aligning the two second threaded holes 14 with the two first threaded holes 13, it is convenient to insert the fastening bolts 5. The two first threaded holes 13 are respectively threaded with fastening bolts 5. By setting the fastening bolts 5, it is convenient to match the second threaded holes 14 with the first threaded holes 13, and a good fastening effect is achieved on the sealing plug 7. The lower end of the second external threaded column 11 is fixedly connected to a clamping plate 4, and the connection between the second external threaded column 11 and the thread groove 12 is installed with a sealing ring 6. The clamping plate 4 is provided to facilitate the compression of the diaphragm body 2, and the sealing ring 6 is provided to prevent liquid from penetrating into the connection between the second external threaded column 11 and the thread groove 12. The clamping plate 4 is made of rubber material, and the outer surface of the diaphragm body 2 is coated with a chromium carbide-nickel chromium coating. By making the clamping plate 4 of rubber material, the clamping plate 4 has a certain sealing performance, and the outer surface of the diaphragm body 2 is coated with a chromium carbide-nickel chromium coating, the diaphragm body 2 has a good anti-corrosion effect.

[0022] As the second embodiment of the utility model: when in use, first insert the sleeve column 10 connected to the first external threaded column 9 into the inner cavity of the main body 1, rotate the sleeve column 10, drive the first external threaded column 9 to rotate, so that the first external threaded column 9 is threadedly connected with the second internal threaded tube 8, and at this time, the sealing plug 7 is in contact with the inner cavity wall of the main body 1, and has a sealing effect on the inner cavity of the main body 1, and then the two fastening bolts 5 are rotated so that the two fastening bolts 5 are respectively threadedly connected with the corresponding second threaded holes 14, and the fastening operation of the sleeve column 10 is completed at this time, and then the second external threaded column 11 is threadedly connected with the thread groove, so that the clamping plate 4 presses the diaphragm body 2, to prevent the liquid from contacting the fastening bolts 5 to a certain extent, thereby affecting the service life of the fastening bolts 5.

[0023] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sealing diaphragm of a pneumatic diaphragm valve, comprising a main body (1), characterized in that: A first internally threaded cylinder (3) is fixedly connected to the upper part of the main body (1); the inner cavity of the first internally threaded cylinder (3) is communicated with the inner cavity of the main body (1); a second internally threaded cylinder (8) is fixedly connected to the lower end of the first internally threaded cylinder (3); a first externally threaded column (9) is threadedly connected to the interior of the second internally threaded cylinder (8); a sleeve column (10) is fixedly connected to the lower end of the first externally threaded column (9); a sealing plug (7) is sleeved on the annular side surface of the sleeve column (10); A threaded groove (12) is provided below the sleeve column (10), a second external threaded column (11) is screwed inside the threaded groove (12), a diaphragm body (2) is fixedly sleeved at the lower end of the main body (1), L-shaped plates (15) are symmetrically installed below the sealing plug (7), and first threaded holes (13) are respectively penetrated above the horizontal sections of the two relative outer ends of the two L-shaped plates (15).

2. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that: Second threaded holes (14) are symmetrically provided below the sealing plug (7), and the two second threaded holes (14) are respectively aligned with the two first threaded holes (13).

3. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that: A fastening bolt (5) is screwed into each of the two first threaded holes (13).

4. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that: A pressing plate (4) is fixedly connected to the lower end of the second external thread column (11), and a sealing ring (6) is installed at the connection between the second external thread column (11) and the thread groove (12).

5. The sealing diaphragm of a pneumatic diaphragm valve according to claim 4, characterized in that: The pressing sheet (4) is made of rubber material.

6. The sealing diaphragm of a pneumatic diaphragm valve according to claim 1, characterized in that: The outer surface of the diaphragm body (2) is coated with a chromium carbide-nickel chromium coating.

Images