Explosion-proof pneumatic control valve

Abstract

The utility model discloses an explosion -proof pneumatic governing valve, including valve body, connecting seat, stuffing box and support, the inside of valve body is provided with valve rod, the connecting seat sets up in the top of valve body, the stuffing box sets up in the inside of connecting seat, the top of stuffing box is provided with ground ring, the support sets up in the top of connecting seat, the inside of support is provided with sleeve, the inside of sleeve is provided with spring, the bottom of spring is provided with piston, the between piston and valve rod is provided with anti -impact gasket, the utility model discloses, through spring, sleeve, piston and anti -impact gasket design, from the mechanical structure on initiative prevention the generation of mechanical spark, high -efficient static control, the combination of innovative "multifunctional graphite stuffing box" and "built -in grounding system", constitutes a continuous, reliable static discharge channel, effectively solved the problem of static electricity that fluid friction generates, and the operation is more stable and safe.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment technology, specifically to an explosion-proof pneumatic regulating valve. Background Technology

[0002] Pneumatic control valves are indispensable actuators in industries such as petroleum, chemical, natural gas, and pharmaceuticals. In environments containing flammable and explosive gases or dust, even tiny sparks generated by ordinary electrical components or mechanical movements can trigger serious explosions.

[0003] In existing technologies, two methods are commonly used to achieve explosion protection for control valves: one is to install the entire control valve and its actuator in a large explosion-proof box. This method is bulky, heavy, costly, and not conducive to heat dissipation and maintenance. The other is to use an intrinsically safe electric positioner. However, this only solves the explosion protection problem at the electrical signal input end and cannot solve the mechanical sparks that may be generated by the internal mechanical components (such as springs, friction and collision of parts) or the static electricity accumulation caused by valve core throttling.

[0004] Therefore, a control valve body design that is compact, highly integrated, and can eliminate the risk of spark generation at the source is needed. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the use of the above and / or explosion-proof pneumatic control valves, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide an explosion-proof pneumatic regulating valve. Through the design of springs, sleeves, pistons and anti-impact gaskets, it actively prevents the generation of mechanical sparks from a mechanical structure perspective. It has efficient electrostatic control. The innovative combination of "multi-functional graphite stuffing box" and "built-in grounding system" forms a continuous and reliable electrostatic discharge channel, effectively solving the problem of static electricity generated by fluid friction, and making the operation more stable and safe.

[0008] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: An explosion-proof pneumatic control valve, comprising: A valve body, wherein a valve stem is provided inside the valve body; A connecting seat is disposed on the top of the valve body; A stuffing box, wherein the stuffing box is disposed inside the connector, and a grounding ring is provided on the top of the stuffing box; A bracket is provided on top of the connecting seat. A sleeve is provided inside the bracket, and a spring is provided inside the sleeve. A piston is provided at the bottom of the spring, and an anti-impact gasket is provided between the piston and the valve stem.

[0009] In a preferred embodiment of the explosion-proof pneumatic regulating valve described in this utility model, a valve seat is provided inside the valve body, and an extension seat is provided on the top of the valve seat.

[0010] In a preferred embodiment of the explosion-proof pneumatic regulating valve described in this utility model, a sealing gasket is provided on the top of the valve seat, and the sealing gasket is tightly fitted with the bottom of the extension seat.

[0011] In a preferred embodiment of the explosion-proof pneumatic regulating valve described in this utility model, a valve core is provided at the bottom of the valve stem, and the valve core cooperates with the valve seat.

[0012] In a preferred embodiment of the explosion-proof pneumatic regulating valve described in this utility model, the valve body is provided with an upper connecting flange at its top, the connecting seat is provided with a lower connecting flange at its bottom, the connecting seat is provided with a support plate at its top, and fastening bolts are provided between the bracket and the support plate.

[0013] As a preferred embodiment of the explosion-proof pneumatic regulating valve of this utility model, the stuffing box is composed of 3-5 rings of graphite packing, which are filled in an alternating 90° manner. A positioning plate is provided at the top of the stuffing box, and a sealing plate is provided at the bottom of the stuffing box. The side wall of the positioning plate is provided with positioning bolts that are fixedly connected to the bracket.

[0014] In a preferred embodiment of the explosion-proof pneumatic regulating valve described in this utility model, the stuffing box is provided with a conductive reinforcing ring made of elastic nickel-based alloy wire, the grounding ring is electrically connected to the conductive reinforcing ring, the grounding ring is connected to a wire, and the wire is connected to a grounding terminal.

[0015] As a preferred embodiment of the explosion-proof pneumatic regulating valve of this utility model, the side wall of the bracket is provided with a panel, the side wall of the panel is provided with a wire hole, the bottom of the bracket is provided with an assembly hole, the side wall of the sleeve is provided with an air source interface, the sleeve is made of polyetheretherketone material, the outer edge of the piston is inlaid with a self-lubricating wear-resistant ring containing carbon fiber and molybdenum disulfide (MoS2) composite material, and the anti-impact gasket is a beryllium bronze gasket.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This explosion-proof pneumatic regulating valve, through the design of spring, sleeve, piston and anti-impact gasket, actively prevents the generation of mechanical sparks from the mechanical structure, achieves efficient static control, and the innovative combination of "multi-functional graphite stuffing box" and "built-in grounding system" forms a continuous and reliable static discharge channel, effectively solving the problem of static electricity generated by fluid friction, and making the operation more stable and safe. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of an explosion-proof pneumatic regulating valve according to this utility model; Figure 2 This is a schematic diagram of the exploded structure of an explosion-proof pneumatic regulating valve according to this utility model; Figure 3 This is a schematic diagram of the support structure of an explosion-proof pneumatic regulating valve according to the present invention. Figure 4 This is a cross-sectional structural diagram of an explosion-proof pneumatic regulating valve according to the present invention. Figure 5 This is a schematic diagram of the stuffing box structure of an explosion-proof pneumatic regulating valve according to this utility model; Figure 6 This is a schematic diagram of the valve seat structure of an explosion-proof pneumatic regulating valve according to this utility model.

[0018] 100. Valve body; 110. Lower connecting flange; 120. Valve stem; 130. Valve core; 140. Valve seat; 141. Sealing gasket; 142. Extension seat; 200. Connecting seat; 210. Upper connecting flange; 220. Support plate; 300. Stuffing gland; 301. Positioning plate; 302. Positioning bolt; 310. Grounding ring; 320. Wire; 330. Grounding terminal; 303. Sealing plate; 400. Bracket; 401. Panel; 402. Wiring hole; 403. Assembly hole; 404. Fastening bolt; 410. Sleeve; 411. Air source interface; 420. Spring; 430. Piston; 440. Anti-impact gasket. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure will not be enlarged to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0022] This utility model provides an explosion-proof pneumatic regulating valve. Through the design of springs, sleeves, pistons and anti-impact gaskets, it actively prevents the generation of mechanical sparks from the mechanical structure. It has efficient electrostatic control. The innovative combination of "multi-functional graphite stuffing box" and "built-in grounding system" forms a continuous and reliable electrostatic discharge channel, which effectively solves the problem of static electricity generated by fluid friction and makes the operation more stable and safe.

[0023] Figures 1-6 The diagram shown is a structural schematic of one embodiment of an explosion-proof pneumatic regulating valve according to this utility model. Please refer to [link / reference]. Figures 1-6 The explosion-proof pneumatic control valve of this embodiment includes a valve body 100, a connecting seat 200, a stuffing box 300, and a bracket 400.

[0024] The valve body 100 cooperates with the valve core 130 through the extension seat 142 on the valve seat 140, keeping the valve core 130 and valve seat 140 tightly engaged when the valve is closed. Specifically, the valve body 100 is provided with a valve stem 120 inside. In this embodiment, the valve body 100 is provided with a valve seat 140 inside. The valve seat 140 is provided with an extension seat 142 on the top. The valve seat 140 is provided with a sealing gasket 141 on the top. The sealing gasket 141 is tightly engaged with the bottom of the extension seat 142. The valve stem 120 is provided with a valve core 130 at the bottom. The valve core 130 cooperates with the valve seat 140. The valve body 100 is provided with an upper connecting flange 210 on the top. The connecting seat 200 is provided with a lower connecting flange 110 at the bottom. The connecting seat 200 is provided with a support plate 220 on the top. The bracket 400 and the support plate 220 are provided with fastening bolts 404. The connecting seat 200 serves as external protection for the stuffing box 300. Specifically, the connecting seat 200 is located on the top of the valve body 100. The stuffing box 300, with its graphite packing, possesses excellent conductivity. Static electricity generated by friction on the valve stem 120 flows through the packing to the guiding reinforcing ring, then from the guiding reinforcing ring to the grounding ring 310, and finally from the grounding ring 310 to the grounding terminal 330, releasing static electricity and preventing the generation of electrostatic sparks that could lead to an explosion. The innovative combination of the "multi-functional graphite stuffing box 300" and the "built-in grounding system" forms a continuous and reliable static discharge channel, effectively solving the problem of static electricity generation due to fluid friction, resulting in smoother and safer operation. Specifically, the stuffing box 300 is located inside the connecting seat 200, and the top of the stuffing box 300 is equipped with... In this embodiment, the stuffing box 300 is composed of 3-5 rings of graphite packing, which are filled in an alternating 90° manner. The top of the stuffing box 300 is provided with a positioning plate 301, and the bottom of the stuffing box 300 is provided with a sealing plate 303. The side wall of the positioning plate 301 is provided with positioning bolts 302 that are fixedly connected to the bracket 400. The inside of the stuffing box 300 is provided with a conductive reinforcing ring made of elastic nickel-based alloy wire. The grounding ring 310 is electrically connected to the conductive reinforcing ring. The grounding ring 310 is connected to a wire 320, and the wire 320 is connected to a grounding terminal 330. The bracket 400 supplies air to the sleeve 410 through the air source interface 411, pushing the piston 430, which in turn causes the valve stem 120 to descend, thus closing the valve. Conversely, under the reset action of the spring 420, the valve stem 120 is raised to open the valve. The sleeve 410, made of flame-retardant material, actively prevents the generation of mechanical sparks from a mechanical structure perspective, achieving efficient electrostatic control. Specifically, the bracket 400 is located on top of the connecting seat 200, and the sleeve 410 is installed inside the bracket 400. The spring 420 is installed inside the sleeve 410, and the piston 430 is installed at the bottom of the spring 420. 30. An anti-impact gasket 440 is provided between the piston 430 and the valve stem 120. In this embodiment, a panel 401 is provided on the side wall of the bracket 400, and a wire hole 402 is provided on the side wall of the panel 401. An assembly hole 403 is provided at the bottom of the bracket 400. An air source interface 411 is provided on the side wall of the sleeve 410. The sleeve 410 is made of polyetheretherketone material. A self-lubricating wear-resistant ring containing carbon fiber and molybdenum disulfide (MoS2) composite material is embedded on the outer edge of the piston 430. The anti-impact gasket 440 is a beryllium bronze gasket.

[0025] Combination Figures 1-6The explosion-proof pneumatic regulating valve of this embodiment is used as follows: through the design of spring 420, sleeve 410, piston 430 and anti-impact gasket 440, the mechanical structure actively prevents the generation of mechanical sparks, and provides efficient electrostatic control. The innovative combination of "multi-functional graphite stuffing box 300" and "built-in grounding system" forms a continuous and reliable electrostatic discharge channel, which effectively solves the problem of static electricity generated by fluid friction, and makes the operation more stable and safe.

[0026] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An explosion-proof pneumatic regulating valve, characterized in that, include: Valve body (100), wherein a valve stem (120) is provided inside the valve body (100); A connecting seat (200) is disposed on the top of the valve body (100); A stuffing box (300) is disposed inside the connector (200), and a grounding ring (310) is disposed on the top of the stuffing box (300). A bracket (400) is provided on the top of the connecting seat (200). A sleeve (410) is provided inside the bracket (400). A spring (420) is provided inside the sleeve (410). A piston (430) is provided at the bottom of the spring (420). An anti-impact gasket (440) is provided between the piston (430) and the valve stem (120).

2. The explosion-proof pneumatic regulating valve according to claim 1, characterized in that, The valve body (100) is provided with a valve seat (140) inside, and an extension seat (142) is provided on the top of the valve seat (140).

3. The explosion-proof pneumatic regulating valve according to claim 2, characterized in that, A sealing gasket (141) is provided on the top of the valve seat (140), and the sealing gasket (141) is in close contact with the bottom of the extension seat (142).

4. The explosion-proof pneumatic regulating valve according to claim 3, characterized in that, The bottom of the valve stem (120) is provided with a valve core (130), which cooperates with the valve seat (140).

5. The explosion-proof pneumatic regulating valve according to claim 4, characterized in that, The valve body (100) is provided with an upper connecting flange (210) at the top, the connecting seat (200) is provided with a lower connecting flange (110) at the bottom, the connecting seat (200) is provided with a support plate (220) at the top, and a fastening bolt (404) is provided between the bracket (400) and the support plate (220).

6. The explosion-proof pneumatic regulating valve according to claim 5, characterized in that, The stuffing box (300) is composed of 3-5 rings of graphite packing, which are filled in an alternating 90° manner. The top of the stuffing box (300) is provided with a positioning plate (301), and the bottom of the stuffing box (300) is provided with a sealing plate (303). The side wall of the positioning plate (301) is provided with positioning bolts (302) that are fixedly connected to the bracket (400).

7. The explosion-proof pneumatic regulating valve according to claim 6, characterized in that, The stuffing box (300) is provided with a conductive reinforcing ring made of elastic nickel-based alloy wire inside. The grounding ring (310) is electrically connected to the conductive reinforcing ring. The grounding ring (310) is connected to a wire (320), and the wire (320) is connected to a grounding terminal (330).

8. The explosion-proof pneumatic regulating valve according to claim 7, characterized in that, The bracket (400) has a panel (401) on its side wall, and a wire hole (402) is provided on the side wall of the panel (401). The bracket (400) has an assembly hole (403) at its bottom. The sleeve (410) has an air source interface (411) on its side wall. The sleeve (410) is made of polyetheretherketone material. The piston (430) has a self-lubricating wear-resistant ring with a composite material of carbon fiber and molybdenum disulfide (MoS2) embedded on its outer edge. The anti-impact gasket (440) is a beryllium bronze gasket.

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