Explosion-proof pneumatic control valve

Abstract

The utility model relates to the technical field of pneumatic valves, and discloses an explosion-proof pneumatic control valve which comprises a valve body, a first flange plate is arranged in the center of the upper end face of the valve body, a second flange plate is arranged at the upper end of the first flange plate, and six bolts are arranged on the upper end face of the first flange plate close to the edge in a circular mode. A sealing structure is arranged on the upper end face of the first flange plate located on the inner sides of the six bolts, a connecting base is arranged on the upper end face of the second flange plate, sealing filler is arranged in the connecting base, a support is arranged at the upper end of the connecting base, a membrane chamber is arranged at the upper end of the support, and a valve rod is arranged at the center of the lower end face of the membrane chamber. According to the utility model, the heat insulation buffer layer is additionally arranged between the first explosion-proof layer and the second explosion-proof layer, the heat insulation buffer layer made of polystyrene foam materials has light weight, good heat insulation performance and certain buffer capability, and the sealing structure is used for filling a gap between the first flange plate and the second flange plate, so that the sealing performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic valves, in particular to an explosion-proof pneumatic regulating valve. Background Art

[0002] A pneumatic control valve is a valve that uses compressed air as a power source to control fluid flow. It is widely used in the field of industrial automation to accurately control the flow, pressure and temperature of fluids in process flows. An explosion-proof pneumatic control valve is a specially designed control valve used to safely control the flow of gas or liquid in flammable and explosive environments. Special measures are taken in the design of this valve to ensure that it will not become an ignition source in potentially explosive environments.

[0003] There are still some problems in the use of existing explosion-proof pneumatic control valves. During long-term use, the explosion-proof shell may not be able to absorb enough impact and vibration, which will increase the risk of damage to internal components and shorten the life of the equipment. Therefore, those skilled in the art provide an explosion-proof pneumatic control valve to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and an explosion-proof pneumatic regulating valve is proposed. A heat-insulating buffer layer is added between the first explosion-proof layer and the second explosion-proof layer. The heat-insulating buffer layer made of polystyrene foam is light in weight, has good heat-insulating performance, and has a certain buffering capacity. The elasticity of polystyrene foam can absorb external shock and vibration, reduce damage to the explosion-proof shell and internal components, extend the service life of the equipment, absorb part of the noise, improve the working environment of the operator, and improve work comfort. The low density helps to reduce the weight of the overall equipment and facilitates installation and maintenance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof pneumatic regulating valve, comprising a valve body, a first flange is provided at the center of the upper end surface of the valve body, a second flange is provided at the upper end of the first flange, six bolts are arranged in a circular pattern near the edge of the upper end surface of the first flange, a sealing structure is provided on the upper end surface of the first flange inside the six bolts, a connecting seat is provided on the upper end surface of the second flange, a sealing packing is provided inside the connecting seat, a bracket is provided on the upper end of the connecting seat, a membrane chamber is provided on the upper end of the bracket, a valve stem is provided at the center of the lower end surface of the membrane chamber, the lower end of the valve stem passes through the bracket, the connecting seat and the valve body in sequence to reach the interior of the valve body, and a valve core is provided at the end thereof, and a valve seat is provided at the center of the interior of the valve body;

[0006] The valve body includes a first explosion-proof layer, a heat-insulating buffer layer and a second explosion-proof layer, wherein the heat-insulating buffer layer is sleeved on the outside of the first explosion-proof layer, and the second explosion-proof layer is sleeved on the outside of the heat-insulating buffer layer;

[0007] Through the above technical solution, an insulating buffer layer is added between the first explosion-proof layer and the second explosion-proof layer. The insulating buffer layer made of polystyrene foam is lightweight, has good thermal insulation performance, and has a certain buffering capacity. The sealing structure fills the gap between the first flange and the second flange to improve the sealing performance.

[0008] Furthermore, the sealing structure includes a first groove, a first rubber pad, a second rubber pad and a second groove, wherein the first groove is arranged on the lower end surface of the second flange, the first rubber pad is arranged inside the first groove, the second groove is arranged on the upper end surface of the first flange at the lower end of the first rubber pad, and the second rubber pad is arranged inside the second groove;

[0009] With the above technical solution, the first rubber pad and the second rubber pad are sealed by being fitted together, thereby improving the sealing performance.

[0010] Furthermore, a slot is provided on the lower end surface of the first rubber pad, and a convex block is provided on the upper end surface of the second rubber pad, and the convex block is slidably connected to the inside of the slot;

[0011] With the above technical solution, the slot at the lower end of the first rubber pad is sleeved on the convex block outside the second rubber pad, increasing the contact area between the first rubber pad and the second rubber pad, thereby improving the sealing performance.

[0012] Furthermore, a mounting groove is provided at the center of the upper end surface of the valve seat, an extension seat is provided at the center of the outer side wall of the valve core, a sealing gasket is provided on the lower end surface of the extension seat, and the sealing gasket and the extension seat are both slidably connected inside the mounting groove;

[0013] Through the above technical solution, the extension seat and the sealing gasket are moved to the inside of the installation groove, and the sealing gasket is arranged obliquely on the outside of the valve core. When the valve core is worn after long-term use, the sealing gasket and the extension seat can also improve the sealing performance, thereby preventing the valve core from wearing out and leaking due to long-term use.

[0014] Furthermore, the output end and the input end of the valve body are both provided with a third flange;

[0015] The above technical solution facilitates the connection of pipelines.

[0016] Furthermore, the heat-insulating buffer layer is made of polystyrene foam;

[0017] Through the above technical solution, the thermal insulation buffer layer made of polystyrene foam is lightweight, has good thermal insulation performance, and has a certain buffering capacity. The elasticity of polystyrene foam can absorb external shocks and vibrations, reduce damage to the explosion-proof shell and internal components, extend the service life of the equipment, absorb some noise, improve the working environment of the operator, and improve work comfort. The low density helps to reduce the weight of the overall equipment and facilitates installation and maintenance.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the utility model, an explosion-proof pneumatic control valve adds an insulating buffer layer between the first explosion-proof layer and the second explosion-proof layer. The insulating buffer layer made of polystyrene foam is lightweight, has good thermal insulation performance, and has a certain buffering capacity. The elasticity of polystyrene foam can absorb external shock and vibration, reduce damage to the explosion-proof shell and internal components, extend the service life of the equipment, absorb part of the noise, improve the working environment of the operator, and improve work comfort. The low density helps to reduce the weight of the overall equipment and facilitates installation and maintenance.

[0020] 2. In the present invention, when the first flange and the second flange are installed, the groove at the lower end of the first rubber pad is sleeved on the protrusion outside the second rubber pad, thereby increasing the contact area between the first rubber pad and the second rubber pad, thereby improving the sealing performance.

[0021] 3. In the present invention, when the valve core is fitted on the valve seat, the extension seat and the sealing gasket move to the inside of the installation groove, and the sealing gasket is obliquely arranged on the outside of the valve core. When the valve core is worn after long-term use, the sealing gasket and the extension seat can also improve the sealing performance, thereby preventing the valve core from being worn and leaking due to long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of an explosion-proof pneumatic regulating valve proposed by the utility model;

[0023] Figure 2 This is a front cross-sectional view of an explosion-proof pneumatic control valve proposed by the utility model;

[0024] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0025] Figure 4 for Figure 2 A magnified schematic diagram of point B in the middle;

[0026] Figure 5 for Figure 2 Enlarged schematic diagram of point C in the middle.

[0027] Legend:

[0028] 1. Valve body; 101. First explosion-proof layer; 102. Insulation buffer layer; 103. Second explosion-proof layer; 2. First flange; 3. Second flange; 4. Bracket; 5. Membrane chamber; 6. Valve stem; 7. Third flange; 8. Sealing packing; 9. Connecting seat; 10. Sealing structure; 1001. First groove; 1002. First rubber pad; 1003. Second rubber pad; 1004. Second groove; 1005. Bump; 1006. Slot; 11. Bolt; 12. Valve seat; 13. Valve core; 14. Extension seat; 15. Sealing pad; 16. Mounting groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1-5 , the utility model provides an embodiment: an explosion-proof pneumatic regulating valve, including a valve body 1, a first flange 2 is provided at the center of the upper end surface of the valve body 1, a second flange 3 is provided at the upper end of the first flange 2, six bolts 11 are arranged in a circle at the edge of the upper end surface of the first flange 2, a sealing structure 10 is provided on the upper end surface of the first flange 2 inside the six bolts 11, and the sealing structure 10 fills the gap between the first flange 2 and the second flange 3 to improve the sealing performance, a connecting seat 9 is provided on the upper end surface of the second flange 3, a sealing packing 8 is provided inside the connecting seat 9, a bracket 4 is provided on the upper end of the connecting seat 9, a membrane chamber 5 is provided on the upper end of the bracket 4, a valve stem 6 is provided at the center of the lower end surface of the membrane chamber 5, the lower end of the valve stem 6 passes through the bracket 4, the connecting seat 9 and the valve body 1 in sequence to reach the interior of the valve body 1, and a valve core 13 is provided at the end thereof, and a valve seat 12 is provided at the center of the interior of the valve body 1.

[0031] The valve body 1 includes a first explosion-proof layer 101, a heat-insulating buffer layer 102 and a second explosion-proof layer 103. The heat-insulating buffer layer 102 is sleeved on the outside of the first explosion-proof layer 101, and the second explosion-proof layer 103 is sleeved on the outside of the heat-insulating buffer layer 102. A heat-insulating buffer layer 102 is added between the first explosion-proof layer 101 and the second explosion-proof layer 103. The heat-insulating buffer layer 102 made of polystyrene foam is lightweight, has good heat-insulating performance, and has a certain buffering capacity.

[0032] The sealing structure 10 includes a first groove 1001, a first rubber pad 1002, a second rubber pad 1003 and a second groove 1004. The first groove 1001 is arranged on the lower end surface of the second flange 3, the first rubber pad 1002 is arranged inside the first groove 1001, the second groove 1004 is arranged on the upper end surface of the first flange 2 at the lower end of the first rubber pad 1002, and the second rubber pad 1003 is arranged inside the second groove 1004. The first rubber pad 1002 and the second rubber pad 1003 are sealed by fitting together to improve the sealing performance.

[0033] A slot 1006 is provided on the lower end surface of the first rubber pad 1002, and a protrusion 1005 is provided on the upper end surface of the second rubber pad 1003. The protrusion 1005 is slidably connected to the inside of the slot 1006. The slot 1006 at the lower end of the first rubber pad 1002 is sleeved on the protrusion 1005 on the outside of the second rubber pad 1003, increasing the contact area between the first rubber pad 1002 and the second rubber pad 1003, thereby improving the sealing performance.

[0034] A mounting groove 16 is provided at the center of the upper end surface of the valve seat 12, an extension seat 14 is provided at the center of the outer side wall of the valve core 13, and a sealing gasket 15 is provided on the lower end surface of the extension seat 14. The sealing gasket 15 and the extension seat 14 are both slidably connected to the inside of the mounting groove 16. The extension seat 14 and the sealing gasket 15 are moved to the inside of the mounting groove 16. The sealing gasket 15 is obliquely arranged on the outside of the valve core 13. When the valve core 13 is worn after long-term use, the sealing performance can be improved by the sealing gasket 15 and the extension seat 14, thereby preventing the valve core 13 from being worn and leaking due to long-term use.

[0035] The output and input ends of the valve body 1 are both provided with a third flange 7 to facilitate the connection of the pipeline. The material of the thermal insulation buffer layer 102 is polystyrene foam. The thermal insulation buffer layer 102 made of polystyrene foam is light in weight, has good thermal insulation performance, and has a certain buffering capacity. The elasticity of polystyrene foam can absorb external shocks and vibrations, reduce damage to the explosion-proof shell and internal components, extend the service life of the equipment, absorb some noise, improve the working environment of the operator, and improve work comfort. It has low density, which helps to reduce the weight of the overall equipment and is easy to install and maintain.

[0036] Working principle: A heat-insulating buffer layer 102 is added between the first explosion-proof layer 101 and the second explosion-proof layer 103. The heat-insulating buffer layer 102 made of polystyrene foam is lightweight, has good heat-insulating performance, and has a certain buffering capacity. The elasticity of polystyrene foam can absorb external shocks and vibrations, reduce damage to the explosion-proof shell and internal components, extend the service life of the equipment, absorb some noise, improve the working environment of the operator, and improve work comfort. The low density helps to reduce the weight of the entire equipment and facilitates installation and maintenance. The pads 1003 fit together to form a seal, and the groove 1006 at the lower end of the first rubber pad 1002 is sleeved on the protrusion 1005 on the outside of the second rubber pad 1003, increasing the contact area between the first rubber pad 1002 and the second rubber pad 1003, thereby improving the sealing performance. The extension seat 14 and the sealing pad 15 are moved to the inside of the installation groove 16, and the sealing pad 15 is tilted on the outside of the valve core 13. When the valve core 13 is worn after long-term use, the sealing performance can also be improved by the sealing pad 15 and the extension seat 14, thereby preventing the valve core 13 from wearing and leaking due to long-term use.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An explosion-proof pneumatic regulating valve, comprising a valve body (1), characterized in that: A first flange (2) is provided at the center of the upper end face of the valve body (1), a second flange (3) is provided at the upper end of the first flange (2), six bolts (11) are arranged in a circular pattern at the edge of the upper end face of the first flange (2), a sealing structure (10) is provided on the upper end face of the first flange (2) inside the six bolts (11), a connecting seat (9) is provided at the upper end face of the second flange (3), a sealing packing (8) is provided inside the connecting seat (9), a bracket (4) is provided at the upper end of the connecting seat (9), a membrane chamber (5) is provided at the upper end of the bracket (4), a valve stem (6) is provided at the center of the lower end face of the membrane chamber (5), the lower end of the valve stem (6) passes through the bracket (4), the connecting seat (9) and the valve body (1) in sequence to reach the interior of the valve body (1), and a valve core (13) is provided at the end thereof, and a valve seat (12) is provided at the center of the interior of the valve body (1); The valve body (1) comprises a first explosion-proof layer (101), a heat-insulating buffer layer (102) and a second explosion-proof layer (103); the heat-insulating buffer layer (102) is sleeved on the outside of the first explosion-proof layer (101); and the second explosion-proof layer (103) is sleeved on the outside of the heat-insulating buffer layer (102).

2. The explosion-proof pneumatic regulating valve according to claim 1, characterized in that: The sealing structure (10) comprises a first groove (1001), a first rubber pad (1002), a second rubber pad (1003) and a second groove (1004), wherein the first groove (1001) is arranged on the lower end surface of the second flange (3), the first rubber pad (1002) is arranged inside the first groove (1001), the second groove (1004) is arranged on the upper end surface of the first flange (2) at the lower end of the first rubber pad (1002), and the second rubber pad (1003) is arranged inside the second groove (1004).

3. The explosion-proof pneumatic regulating valve according to claim 2, characterized in that: The lower end surface of the first rubber pad (1002) is provided with a slot (1006), and the upper end surface of the second rubber pad (1003) is provided with a convex block (1005), and the convex block (1005) is slidably connected inside the slot (1006).

4. The explosion-proof pneumatic control valve according to claim 1, characterized in that: A mounting groove (16) is provided at the center of the upper end surface of the valve seat (12), an extension seat (14) is provided at the center of the outer side wall of the valve core (13), a sealing gasket (15) is provided at the lower end surface of the extension seat (14), and the sealing gasket (15) and the extension seat (14) are both slidably connected inside the mounting groove (16).

5. The explosion-proof pneumatic regulating valve according to claim 1, characterized in that: The output end and the input end of the valve body (1) are both provided with a third flange (7).

6. The explosion-proof pneumatic regulating valve according to claim 1, characterized in that: The heat-insulating buffer layer (102) is made of polystyrene foam.

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