Dustproof positive and negative pressure sealing valve

Abstract

The utility model discloses a dustproof positive and negative pressure sealing valve, which relates to the technical field of sealing valves, and comprises a valve body mechanism, the valve body mechanism comprises a mounting piece, the bottom of the mounting piece is fixedly connected with a valve body, the surface of the valve body is provided with threads, and the bottom of the mounting piece is fixedly connected with a first sealing ring. The receding holes are directly formed in the surface of the cover body, the traditional punching technology is replaced, the machining process is simplified, the manufacturing cost is reduced, meanwhile, the receding holes are accurately matched with the upper ends of the ejector pins, the ejector pins only move in the receding holes when the cover body is installed, the cover body is prevented from pressing and ejecting the ejector pins, and the production efficiency is improved. A first sealing ring at the bottom of the mounting piece, a second sealing ring on the inner wall of the cover body and a third sealing ring at the upper end of the valve element body are matched with a sealing gasket, a first sealing sleeve and a second sealing sleeve to form multiple sealing barriers, and compared with a traditional two-layer sealing structure, the sealing performance is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing valve technology, specifically to a dustproof positive and negative pressure sealing valve. Background Technology

[0002] Sealing valves, as indispensable key components in the industrial field, are widely used in numerous industries such as petrochemicals, natural gas transportation, pharmaceuticals, and food processing. In the petrochemical industry, pipeline systems transport various high-temperature, high-pressure, and highly corrosive liquids and gases, playing a crucial role in precisely controlling fluid flow and preventing leaks. Once the seal fails, it not only leads to material waste and environmental pollution but can also potentially cause serious safety accidents. In the food processing and pharmaceutical industries, where hygiene standards are extremely high, sealing valves must ensure that the sterile environment is not compromised and prevent impurities from contaminating the product. However, with the rapid development of various industries, higher demands are being placed on the sealing performance, durability, adjustment accuracy, and adaptability to complex operating conditions of sealing valves, prompting continuous innovation and upgrading.

[0003] Currently, conventional valve bodies are often designed to slightly protrude from the valve opening to make it easier to press down the ejector pin. When installing the valve body cover, this design can cause the cover to push the ejector pin downwards, leading to leakage of the sealing valve. The conventional solution is to drill holes in the cover to ensure complete sealing, but this method involves complicated processing steps, resulting in higher costs, and only provides two layers of seal with poor sealing performance. Summary of the Invention

[0004] This utility model provides a dustproof positive and negative pressure sealing valve to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A dustproof positive and negative pressure sealing valve includes a valve body mechanism, wherein the valve body mechanism includes a mounting component, the bottom of which is fixedly connected to a valve body with threads on its surface, and the bottom of the mounting component is fixedly connected to a first sealing ring; a dustproof cover mechanism, wherein the dustproof cover mechanism includes a cover body, the bottom of which is sleeved with the surface of the mounting component, and the inner wall of the cover body is fixedly connected to a second sealing ring; and a valve core mechanism, wherein the valve core mechanism includes a valve core body, the surface of which is threaded to the inner wall of the valve body, the upper surface of which is fixedly connected to a third sealing ring, and the inner wall of the valve core body is fixedly connected to a cross guide component, the inside of which a pin is slidably connected.

[0007] A further improvement of this utility model is that the cover is made of plastic and has an eye-avoidance feature directly formed on its surface.

[0008] A further improvement of the present invention is that the valve body mechanism further includes a sealing gasket, the bottom of which is fixedly connected to the surface of the mounting component, and the top of which overlaps with the lower surface of the cover.

[0009] A further improvement of the present invention is that the valve core mechanism further includes a first sealing block, the top of which is fixedly connected to the bottom of the ejector pin.

[0010] A further improvement of this utility model is that a first sealing sleeve is fixed on the surface of the first sealing block, and the surface of the first sealing sleeve overlaps with the inner wall of the valve core.

[0011] A further improvement of this utility model is that: a spring is fixedly connected to the inner wall of the valve core, a connector is fixedly connected to the top of the spring, and the interior of the connector is slidably connected to the surface of the ejector pin.

[0012] A further improvement of the present invention is that: the bottom of the first sealing block is fixedly connected to the second sealing block by a fixing rod, the surface of the second sealing block is fixedly connected to the second sealing sleeve, the surface of the second sealing sleeve overlaps with the inner wall of the valve body, and the upper end of the ejector pin is located inside the clearance eye.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] This utility model provides a dustproof positive and negative pressure sealing valve. By directly forming clearance holes on the surface of the cover, it replaces the traditional drilling process, simplifies the processing flow and reduces manufacturing costs. At the same time, the clearance holes precisely match the upper end of the ejector pin. When the cover is installed, the ejector pin only moves within the clearance holes, avoiding the cover pressing down and pushing the ejector pin. The structural design eliminates the sealing failure problem caused by accidental contact of the ejector pin. The first sealing ring at the bottom of the mounting part, the second sealing ring on the inner wall of the cover, and the third sealing ring at the upper end of the valve core, together with the sealing gasket, the first sealing sleeve and the second sealing sleeve, form a multi-layer sealing barrier, which greatly enhances the sealing performance compared to the traditional two-layer sealing structure. The design of the spring and the double sealing block ensures that when the ejector pin is not pressed, reliable sealing is achieved through the tight overlap of the sealing block with the valve body and the valve core. The operation is stable and durable. Attached Figure Description

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

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

[0017] Figure 3 This is an exploded structural diagram of the present invention;

[0018] Figure 4 This is a bottom view of the cover structure of this utility model;

[0019] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0020] In the diagram: 11. Mounting component; 12. Valve body; 13. First sealing ring; 14. Sealing gasket; 21. Cover; 22. Second sealing ring; 23. Clearance eye; 31. Valve core; 32. Third sealing ring; 33. Cross guide; 34. Ejector pin; 35. First sealing block; 36. First sealing sleeve; 37. Spring; 38. Connector; 39. Second sealing block; 310. Second sealing sleeve. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to embodiments: Example

[0022] like Figure 1-5 As shown, this utility model provides a dustproof positive and negative pressure sealing valve, including a valve body mechanism, which includes a mounting part 11. The bottom of the mounting part 11 is fixedly connected to a valve body 12 with threads on its surface, and the bottom of the mounting part 11 is fixedly connected to a first sealing ring 13. The dustproof cover mechanism includes a cover body 21, the bottom of the cover body 21 is sleeved with the surface of the mounting part 11, and the inner wall of the cover body 21 is fixedly connected to a second sealing ring 22.

[0023] The valve core mechanism includes a valve core body 31, the surface of which is threaded to the inner wall of the valve body 12, a third sealing ring 32 is fixedly connected to the upper surface of the valve core body 31, a cross guide 33 is fixedly connected to the inner wall of the valve core body 31, and a pin 34 is slidably connected inside the cross guide 33.

[0024] In this embodiment, during installation, the valve body 12 is connected to the external device via the bottom thread, the valve core 31 is screwed in along the inner wall thread of the valve body 12, and the third sealing ring 32 fits against the inner wall of the valve body 12 to achieve initial sealing; the mounting part 11 is fixed to the upper end of the valve body 12, the first sealing ring 13 overlaps with the external device, and the sealing gasket 14 fills the contact surface between the mounting part 11 and the cover 21. Example

[0025] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the cover 21 is made of plastic, and the surface is directly formed with a clearance eye 23. The valve body mechanism also includes a sealing gasket 14, the bottom of the sealing gasket 14 is fixedly connected to the surface of the mounting part 11, and the top of the sealing gasket 14 overlaps with the lower surface of the cover 21. The valve core mechanism also includes a first sealing block 35, the top of the first sealing block 35 is fixedly connected to the bottom of the ejector pin 34.

[0026] In this embodiment, when the dust cover 21 is installed, the cover 21 is sleeved along the outer wall of the mounting part 11, the second sealing ring 22 is tightly abutted against the surface of the mounting part 11, and the upper end of the ejector pin 34 only extends into the clearance eye 23. When the cover 21 is pressed down, the ejector pin 34 is not squeezed. Under normal working conditions, the spring 37 naturally extends to push the connector 38, so that the first sealing block 35 and the second sealing block 39 at the bottom of the ejector pin 34 are tightly fitted with the inner wall of the valve core 31 and the valve body 12, respectively, blocking the fluid passage between the inner cavity of the valve core 31 and the lower end of the valve body 12. Example

[0027] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a first sealing sleeve 36 is fixed to the surface of the first sealing block 35, the surface of the first sealing sleeve 36 overlaps with the inner wall of the valve core 31, a spring 37 is fixedly connected to the inner wall of the valve core 31, a connector 38 is fixedly connected to the top of the spring 37, the interior of the connector 38 is slidably connected to the surface of the ejector pin 34, a second sealing block 39 is fixedly connected to the bottom of the first sealing block 35 through a fixing rod, a second sealing sleeve 310 is fixedly connected to the surface of the second sealing block 39, the surface of the second sealing sleeve 310 overlaps with the inner wall of the valve body 12, and the upper end of the ejector pin 34 is located inside the clearance eye 23.

[0028] In this embodiment, when conduction is required, the ejector pin 34 is pressed down to slide down along the cross guide 33, compressing the spring 37 and causing the first sealing block 35 and the second sealing block 39 to disengage from the sealing surface. The inner cavity of the valve core 31 is connected to the lower end of the valve body 12 to achieve positive and negative pressure fluid transmission. After release, the spring 37 returns to its original position, the ejector pin 34 moves upward, and the sealing blocks re-fit the sealing surface. The multi-layer sealing structure ensures no leakage.

[0029] The working principle of this dustproof positive and negative pressure sealing valve will be explained in detail below.

[0030] like Figure 1-5As shown, during installation, the valve body 12 is connected to the external device via the bottom thread. The valve core 31 is screwed in along the inner wall thread of the valve body 12, and the third sealing ring 32 fits against the inner wall of the valve body 12 to achieve initial sealing. The mounting part 11 is fixed to the upper end of the valve body 12, the first sealing ring 13 overlaps with the external device, and the sealing gasket 14 fills the contact surface between the mounting part 11 and the cover 21. When installing the dust cover 21, the cover 21 is fitted along the outer wall of the mounting part 11, and the second sealing ring 22 is tightly abutted against the surface of the mounting part 11. At the same time, the upper end of the ejector pin 34 only extends into the clearance eye 23. When the cover 21 is pressed down, the ejector pin 34 is prevented from being squeezed. Under normal operating conditions... Spring 37 extends naturally to push connector 38, causing the first sealing block 35 and the second sealing block 39 at the bottom of ejector pin 34 to fit tightly against the inner walls of valve core 31 and valve body 12, respectively, blocking the fluid passage between the inner cavity of valve core 31 and the lower end of valve body 12. When it is necessary to open the passage, press ejector pin 34 to make it slide down along cross guide 33, compress spring 37 and drive the first sealing block 35 and the second sealing block 39 to disengage from the sealing surface, and the inner cavity of valve core 31 and the lower end of valve body 12 are connected to achieve positive and negative pressure fluid transmission. After releasing, spring 37 returns to its original position, ejector pin 34 moves upward, and the sealing blocks re-fit the sealing surface, which, together with the multi-layer sealing structure, ensures no leakage.

[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A dustproof positive and negative pressure sealing valve, characterized in that: include The valve body mechanism includes a mounting component (11), the bottom of which is fixedly connected to a valve body (12) with threads on its surface, and the bottom of which is fixedly connected to a first sealing ring (13). The dust cover mechanism includes a cover body (21), the bottom of which is sleeved with the surface of the mounting part (11), and a second sealing ring (22) is fixedly connected to the inner wall of the cover body (21). The valve core mechanism includes a valve core body (31), the surface of the valve core body (31) is threaded to the inner wall of the valve body (12), a third sealing ring (32) is fixedly connected to the upper surface of the valve core body (31), a cross guide (33) is fixedly connected to the inner wall of the valve core body (31), and a pin (34) is slidably connected inside the cross guide (33).

2. The dustproof positive and negative pressure sealing valve according to claim 1, characterized in that; The cover (21) is made of plastic and has a clearance eye (23) directly formed on its surface.

3. The dustproof positive and negative pressure sealing valve according to claim 1, characterized in that: The valve body mechanism also includes a sealing gasket (14), the bottom of which is fixedly connected to the surface of the mounting component (11), and the top of which overlaps with the lower surface of the cover (21).

4. The dustproof positive and negative pressure sealing valve according to claim 1, characterized in that: The valve core mechanism also includes a first sealing block (35), the top of which is fixedly connected to the bottom of the ejector pin (34).

5. The dustproof positive and negative pressure sealing valve according to claim 4, characterized in that: The surface of the first sealing block (35) is fixed with a first sealing sleeve (36), and the surface of the first sealing sleeve (36) overlaps with the inner wall of the valve core (31).

6. The dustproof positive and negative pressure sealing valve according to claim 5, characterized in that: A spring (37) is fixedly connected to the inner wall of the valve core (31), and a connector (38) is fixedly connected to the top of the spring (37). The interior of the connector (38) is slidably connected to the surface of the ejector pin (34).

7. The dustproof positive and negative pressure sealing valve according to claim 6, characterized in that: The bottom of the first sealing block (35) is fixedly connected to the second sealing block (39) by a fixing rod. The surface of the second sealing block (39) is fixedly connected to the second sealing sleeve (310). The surface of the second sealing sleeve (310) overlaps with the inner wall of the valve body (12). The upper end of the pin (34) is located inside the clearance eye (23).

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