Pneumatic double-gate valve

Abstract

The utility model belongs to the technical field of plate valves, and discloses a pneumatic double-gate-plate valve which comprises a pipe body, a valve mechanism is arranged on the outer side of the pipe body, a sealing mechanism is arranged on the outer side of the valve mechanism, the valve mechanism comprises a base, the base is fixedly connected with the pipe body, a shell is fixedly arranged on the upper surface of the base, and the sealing mechanism is arranged on the outer side of the shell. The valve mechanism comprises a shell and a base, an air cylinder is fixedly arranged on the upper surface of the shell, a connecting rod is fixedly arranged at the output end of the air cylinder, double brake cores are fixedly arranged at the lower end of the connecting rod, and the outer sides of the double brake cores are attached to the inner side of the base in a sliding mode. The cleaning cotton on the inner wall of the shell can remove media attached to the surfaces of the double brake cores, abrasion and clamping stagnation risks are reduced, long-term operation stability is guaranteed, a multi-stage rigid pressing sealing structure is formed through the sealing mechanism, meanwhile, disassembly, assembly and maintenance are convenient, and the overall design gives consideration to sealing reliability, operation convenience and maintenance economical efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of plate valve technology, specifically a pneumatic double gate valve. Background Technology

[0002] Pneumatic double gate valves are suitable for applications requiring rapid opening / closing or precise flow control in industrial fluid transport pipelines, such as pneumatic pipeline shut-off in coal mine powder transport systems, emergency shut-off of corrosive media pipelines in chemical raw material tank areas, leak prevention control in raw material / clinker transport pipelines in cement production lines, flow regulation in high-temperature gas pipelines of metallurgical blast furnace hot blast stoves, and wear-resistant conditions in slurry transport systems of sewage treatment plants.

[0003] However, the following problems were found in the implementation of the relevant technologies:

[0004] Existing pneumatic valves in industrial settings often face the problem of gate deflection due to media impact during frequent opening and closing. This is especially true when conveying slurries, coal powder, or viscous fluids containing particles. The media tends to accumulate on the surface of a single gate, forming a hardened layer. After long-term operation, this can cause the gate to jam or even become stuck between the gate and the valve seat, resulting in delayed opening and closing response or complete failure. At the same time, conventional valve body sealing structures rely on hard metal seals. Under high pressure, high temperature, or strong corrosive conditions, the difference in thermal expansion coefficients of the metal sealing surfaces can easily lead to gap leakage. Furthermore, some sealing structures require the entire valve body to be disassembled for replacement, which can take up to several hours for maintenance, resulting in significant production line downtime and losses. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a pneumatic double gate valve with the advantages of reliable flow control and rigid compression sealing. This invention achieves rapid response and reliable flow control for fluid flow through its valve mechanism. The cleaning cotton on the inner wall of the outer shell removes adhering media from the surface of the double gate cores, reducing wear and jamming risks and ensuring long-term operational stability. Furthermore, the sealing mechanism forms a multi-stage rigid compression sealing structure, facilitating disassembly and maintenance. The overall design balances sealing reliability, ease of operation, and economical maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic double gate valve, comprising a pipe body, a valve mechanism provided on the outer side of the pipe body, a sealing mechanism provided on the outer side of the valve mechanism, the valve mechanism comprising a base, the base being fixedly connected to the pipe body, a housing being fixedly provided on the upper surface of the base, a cylinder being fixedly provided on the upper surface of the housing, a connecting rod being fixedly provided at the output end of the cylinder, and a double gate core being fixedly provided at the lower end of the connecting rod, the outer side of the double gate core slidingly fitting against the inner side of the base.

[0007] Preferably, the sealing mechanism includes a sealing plate, the upper surface of which is fixedly connected to the outer shell, and a plurality of sealing screws arranged in a rectangular array are slidably inserted on the upper surface of the sealing plate. Two fastening nuts are threaded on the outer side of the sealing screws, and one end of the two fastening nuts is respectively attached to the upper surface of the sealing plate and the upper end of the base.

[0008] Preferably, a mounting bracket is fixedly provided on the upper surface of the housing, and the inner side of the mounting bracket is fixedly connected to the cylinder.

[0009] Preferably, cleaning cotton is fixedly provided on both inner walls of the outer casing, and one side of the cleaning cotton is slidably attached to one side of the dual-core.

[0010] Preferably, the upper surface of the base is provided with a gate groove, and the inner side of the gate groove is slidably fitted with the double gate core.

[0011] Preferably, the upper surface of the sealing plate is provided with multiple mounting holes, and the upper surface of the base is provided with multiple fastening holes, the mounting holes and fastening holes being slidably fitted with the sealing screw.

[0012] Preferably, the lower surface of the sealing plate is provided with a sealing gasket.

[0013] Preferably, one end of the fastening nut is provided with an anti-loosening washer.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model uses a valve mechanism to drive the double gate cores to slide precisely along the gate groove of the base through a cylinder, thereby achieving rapid response and reliable flow control for fluid flow. The cleaning cotton on the inner wall of the outer shell can remove the medium adhering to the surface of the double gate cores, reducing wear and jamming risks and ensuring long-term operational stability.

[0016] 2. This utility model uses a sealing mechanism, through multiple sets of sealing screws between the sealing plate and the base, and fastening nuts and anti-loosening washers, to form a multi-stage rigid compression sealing structure. It is also easy to disassemble and maintain. The overall design takes into account the reliability of sealing, the convenience of operation and the economy of maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the valve mechanism and sealing mechanism of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the valve mechanism structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the sealing mechanism of this utility model.

[0021] In the diagram: 1. Pipe body; 2. Valve mechanism; 3. Sealing mechanism; 20. Outer shell; 21. Mounting bracket; 22. Cylinder; 23. Connecting rod; 24. Cleaning cotton; 25. Gate slot; 26. Double gate core; 27. Base; 30. Sealing plate; 31. Mounting hole; 32. Sealing gasket; 33. Fastening hole; 34. Fastening nut; 35. Anti-loosening washer; 36. Sealing screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 As shown, this utility model provides a pneumatic double gate valve, including a pipe body 1, a valve mechanism 2 on the outer side of the pipe body 1, and a sealing mechanism 3 on the outer side of the valve mechanism 2. The valve mechanism 2 includes a base 27, which is fixedly connected to the pipe body 1. A housing 20 is fixedly mounted on the upper surface of the base 27, and a cylinder 22 is fixedly mounted on the upper surface of the housing 20. A connecting rod 23 is fixedly mounted on the output end of the cylinder 22, and a double gate core 26 is fixedly mounted on the lower end of the connecting rod 23. The outer side of the double gate core 26 slides against the inner side of the base 27. When it is necessary to control the flow of fluid, the cylinder 22 of the pneumatic double gate valve starts after receiving an external air source signal. It drives the connecting rod 23 to move vertically through the output end, thereby driving the double gate core 26 to slide down or move up synchronously along the gate groove 25 on the upper surface of the base 27. When sliding down, the double gate core 26 is tightly fitted with the gate groove 25, blocking the fluid passage in the pipe body 1; when moving up, the double gate core 26 disengages from the gate groove 25, and the fluid passage is restored. During operation, the cleaning cotton 24 on both sides of the inner wall of the outer casing 20 continuously scrapes away the medium residue attached to the surface of the dual gate core 26 to prevent caking or jamming.

[0024] Specifically, the sealing mechanism 3 includes a sealing plate 30. The upper surface of the sealing plate 30 is fixedly connected to the outer casing 20. Multiple sealing screws 36 arranged in a rectangular array are slidably inserted into the upper surface of the sealing plate 30. Two fastening nuts 34 are threaded onto the outer side of each sealing screw 36. One end of each fastening nut 34 is respectively engaged with the upper surface of the sealing plate 30 and the upper end of the base 27. During installation, the sealing plate 30 is aligned with the lower surface of the outer casing 20, aligning the mounting holes 31 on the sealing plate 30 with the fastening holes 33 on the base 27. Then, the sealing screws 36 are inserted, and the two fastening nuts 34 are tightened onto the upper surface of the sealing plate 30 and the upper end of the base 27, respectively, forming a rigid compression seal with the anti-loosening washer 35. The sealing gasket 32 ​​on the lower surface of the sealing plate 30 deforms under pressure, filling the micro-gaps in the contact surface and further enhancing the sealing effect. When maintenance is required, the sealing plate 30 can be quickly disassembled by loosening the fastening nuts 34, allowing for the replacement of the sealing gasket 32 ​​or the sealing screws 36.

[0025] Furthermore, the cylinder 22 is rigidly connected to the housing 20 by the mounting bracket 21, which avoids the connection point from loosening due to vibration when the cylinder 22 is directly fixed to the housing 20, improves the stability of the cylinder 22, reduces the risk of cylinder 22 displacement caused by connection failure during long-term operation, and extends the service life of the valve mechanism 2.

[0026] Furthermore, the cleaning cotton 24 on both sides of the inner wall of the outer shell 20 slides and fits against the double gate core 26, scraping off the surface medium in real time during the opening and closing of the gate core, preventing the medium from caking or entering the gate groove 25 and wearing the sealing surface, significantly reducing the probability of jamming, reducing the frequency of manual cleaning, and ensuring the long-term smooth operation of the valve mechanism 2 under complex working conditions.

[0027] It is worth noting that the gate groove 25 on the upper surface of the base 27 slides and fits with the double gate core 26 to form a precise linear guide structure, which avoids the double gate core 26 from shifting during opening and closing, causing misalignment of the sealing surface, improving the flow interception accuracy of the valve mechanism 2, and reducing the risk of media leakage. It is especially suitable for high pressure or high viscosity fluid conditions.

[0028] It is worth noting that the mounting hole 31 of the sealing plate 30 and the fastening hole 33 of the base 27 are slidably engaged by the sealing screw 36, thereby realizing the modular installation of the sealing mechanism 3.

[0029] It is worth mentioning that the sealing gasket 32 ​​on the lower surface of the sealing plate 30 deforms under pressure to fill the micro gaps in the contact surface, forming an elastic sealing layer. This effectively resists the gaps in the sealing surface caused by temperature changes or vibration, making it especially suitable for high temperature or high pressure conditions and significantly improving the reliability of the sealing mechanism 3.

[0030] It is worth emphasizing that the combination design of the fastening nut 34 and the anti-loosening washer 35 can maintain a constant preload under vibration or high temperature environment, and prevent leakage caused by loosening of the sealing mechanism 3.

[0031] Cylinder 22 is existing technology and will not be described in detail; this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail; the "front, rear, left, and right" views of this device are... Figure 1 The direction shown in the diagram is the reference.

[0032] Working principle: When fluid flow needs to be controlled, the cylinder 22 of the pneumatic double gate valve starts after receiving an external air source signal. This drives the connecting rod 23 to move vertically via its output end, which in turn drives the double gate cores 26 to slide down or move up synchronously along the gate grooves 25 on the upper surface of the base 27. When sliding down, the double gate cores 26 are tightly fitted with the gate grooves 25, blocking the fluid passage within the pipe body 1; when moving up, the double gate cores 26 disengage from the gate grooves 25, restoring fluid flow. During the movement, the cleaning cotton 24 on both sides of the inner wall of the outer casing 20 continuously scrapes away any media residue adhering to the surface of the double gate cores 26, preventing caking or jamming.

[0033] During installation, the sealing plate 30 is fitted against the lower surface of the housing 20, aligning the mounting holes 31 on the sealing plate 30 with the fastening holes 33 on the base 27. The sealing screw 36 is then inserted, and two fastening nuts 34 are tightened onto the upper surface of the sealing plate 30 and the upper end of the base 27, respectively, forming a rigid compression seal with the anti-loosening washer 35. The sealing gasket 32 ​​on the lower surface of the sealing plate 30 deforms under pressure, filling the micro-gaps in the contact surface and further enhancing the sealing effect. For maintenance, the sealing plate 30 can be quickly removed by loosening the fastening nuts 34, allowing for the replacement of the sealing gasket 32 ​​or the sealing screw 36.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic double gate valve, comprising a pipe body (1), characterized in that: A valve mechanism (2) is provided on the outside of the pipe body (1), and a sealing mechanism (3) is provided on the outside of the valve mechanism (2). The valve mechanism (2) includes a base (27), which is fixedly connected to the pipe body (1). The upper surface of the base (27) is fixedly provided with a shell (20), and the upper surface of the shell (20) is fixedly provided with a cylinder (22). The output end of the cylinder (22) is fixedly provided with a connecting rod (23), and the lower end of the connecting rod (23) is fixedly provided with a double gate core (26). The outer side of the double gate core (26) slides against the inner side of the base (27).

2. The pneumatic double gate valve according to claim 1, characterized in that: The sealing mechanism (3) includes a sealing plate (30), the upper surface of the sealing plate (30) is fixedly connected to the outer shell (20), and a plurality of sealing screws (36) arranged in a rectangular array are slidably inserted on the upper surface of the sealing plate (30). Two fastening nuts (34) are threaded on the outer side of the sealing screws (36), and one end of the two fastening nuts (34) is respectively attached to the upper surface of the sealing plate (30) and the upper end of the base (27).

3. A pneumatic double gate valve according to claim 1, characterized in that: The upper surface of the outer shell (20) is fixedly provided with a mounting bracket (21), and the inner side of the mounting bracket (21) is fixedly connected to the cylinder (22).

4. A pneumatic double gate valve according to claim 1, characterized in that: Cleaning cotton (24) is fixedly provided on both inner walls of the outer shell (20), and one side of the cleaning cotton (24) slides against one side of the double gate core (26).

5. A pneumatic double gate valve according to claim 1, characterized in that: The upper surface of the base (27) is provided with a gate groove (25), and the inner side of the gate groove (25) is slidably attached to the double gate core (26).

6. A pneumatic double gate valve according to claim 2, characterized in that: The upper surface of the sealing plate (30) is provided with multiple mounting holes (31), and the upper surface of the base (27) is provided with multiple fastening holes (33). The mounting holes (31) and fastening holes (33) are slidably fitted with the sealing screw (36).

7. A pneumatic double gate valve according to claim 2, characterized in that: The lower surface of the sealing plate (30) is provided with a sealing gasket (32).

8. A pneumatic double gate valve according to claim 2, characterized in that: One end of the fastening nut (34) is provided with an anti-loosening washer (35).

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