Pneumatic valve with tungsten carbide coating

Abstract

The utility model relates to the technical field of pneumatic valves, in particular to a pneumatic valve with a tungsten carbide coating, which comprises a pneumatic valve main body, a valve body is arranged on the pneumatic valve main body, a valve seat positioning seat with an integral structure is arranged in the valve body, and the upper end and the lower end of the valve body are respectively provided with an opening structure with a flange plate. The upper end and the lower end of the valve body are connected with a pneumatic diaphragm actuator support and a fastening seat respectively, a valve seat is clamped and fastened to the upper end of the fastening seat, a valve seat coating is sprayed to the outside of the valve seat, material channels are formed in the side face of the valve seat at intervals, a valve element matched with the valve seat is arranged above a valve seat positioning seat, and a valve element coating is sprayed to the outside of the valve element. According to the pneumatic valve with the tungsten carbide coatings, the tungsten carbide coatings are arranged on the matched portions of the valve element and the valve seat, the abrasion resistance of the sealing face can be effectively improved, the service life of the valve is prolonged, meanwhile, the valve element and the valve seat are detachable, and maintenance of the valve is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic valves, in particular to a pneumatic valve with a tungsten carbide coating. Background Art

[0002] Pneumatic valves are valves that control the flow of fluids (such as gas, liquid, etc.) through air pressure drive. Compressed air is used as the power source, and the opening and closing of the valve is driven by the expansion or rotation of the pneumatic actuator (such as cylinder, pneumatic diaphragm), thereby controlling the flow of media in the pipeline. Pneumatic valves are mainly composed of valve bodies, pneumatic actuators and control components, and are widely used in industries such as petroleum, chemical industry, electric power, metallurgy, water treatment, and food processing.

[0003] When the existing pneumatic valve is closed, the valve and the valve core cooperate with each other, but the friction generated by the long-term interaction will cause the valve and the valve core to wear each other, resulting in an insufficient sealing surface and affecting the service life of the valve. Utility Model Content

[0004] The purpose of the utility model is to provide a pneumatic valve with a tungsten carbide coating to solve the problem raised in the above background technology that when the pneumatic valves on the market are closed, the valve and the valve core cooperate with each other, but the friction generated by the long-term interaction will cause the valve and the valve core to wear each other, resulting in an insufficiently tight sealing surface, which affects the service life of the valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic valve with a tungsten carbide coating, comprising a pneumatic valve body, a valve body is provided on the pneumatic valve body, and a valve seat positioning seat of an integrated structure is provided in the valve body, and a feed channel and a discharge channel are respectively provided on both sides of the valve seat positioning seat in the valve body, and opening structures with flanges are also respectively provided at the upper and lower ends of the valve body, and a pneumatic diaphragm actuator bracket and a fastening seat are respectively connected to the upper and lower ends of the valve body, a valve seat is clamped and fastened at the upper end of the fastening seat, and a valve seat coating is sprayed on the outside of the valve seat, and material channels are spaced apart on the side of the valve seat, a valve core that cooperates with the valve seat is provided above the valve seat positioning seat, and a valve core coating is sprayed on the outside of the valve core, so that the valve core and the valve seat are matched through the valve core coating and the valve seat coating.

[0006] Preferably, a valve stem is threadedly fixed to the upper end of the valve core, and the valve stem passes through the valve body and the pneumatic diaphragm actuator bracket, a spring is sleeved on the valve stem inside the pneumatic diaphragm actuator bracket, and a sealing packing that matches the valve stem is also provided in the pneumatic diaphragm actuator bracket, and a pneumatic diaphragm acting on the valve stem is installed in the pneumatic diaphragm actuator bracket.

[0007] Preferably, a sealing ring is fastened to the clamping joint between the fastening seat and the valve seat, and the sealing ring is clamped to the bottom opening of the valve body.

[0008] Preferably, the lower end of the valve seat is an open structure, and a filter screen is inserted into the valve seat.

[0009] Preferably, a tapered hole cooperating with the valve core is provided in the middle of the upper end of the valve seat, and the upper end of the valve seat is fastened and snap-fitted with the valve seat positioning seat.

[0010] Preferably, a valve core seal is sleeved on the valve stem, and the valve core seal is in close contact with the upper end of the valve core, and the size of the valve core seal is larger than the size of the valve seat.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the pneumatic valve with tungsten carbide coating is provided with tungsten carbide coating at the matching parts of the valve core and the valve seat, which can effectively increase the wear resistance of the sealing surface and extend the service life of the valve. At the same time, the valve core and the valve seat can be disassembled, which is easy to maintain the valve. The pneumatic valve with tungsten carbide coating is provided with a valve core seal on the valve core, which can make the valve core seal act on the valve seat positioning seat, and play a role in strengthening the sealing of the valve core and the valve seat, so as to facilitate the use of the pneumatic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a pneumatic valve with a tungsten carbide coating according to the utility model;

[0013] Figure 2 The utility model is a pneumatic valve with tungsten carbide coating Figure 1 The enlarged structural diagram at A in the middle;

[0014] Figure 3 The utility model is a schematic diagram of the structure of a material channel opened on the valve seat of a pneumatic valve with a tungsten carbide coating.

[0015] In the figure: 1. pneumatic valve body; 2. valve core; 201. valve core coating; 3. fastening seat; 301. sealing ring; 4. valve seat; 401. filter screen; 402. valve seat coating; 403. material channel; 5. valve body; 501. feed channel; 502. discharge channel; 6. sealing packing; 7. valve core seal; 8. pneumatic diaphragm actuator bracket; 801. pneumatic diaphragm; 9. spring; 10. valve stem; 11. valve seat positioning seat. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3The utility model provides a technical solution: a pneumatic valve with a tungsten carbide coating, comprising a pneumatic valve body 1, a valve body 5 is arranged on the pneumatic valve body 1, and a valve seat positioning seat 11 of an integrated structure is arranged in the valve body 5, and a feed channel 501 and a discharge channel 502 are respectively arranged on both sides of the valve seat positioning seat 11 in the valve body 5, and an opening structure with a flange is also arranged at the upper and lower ends of the valve body 5, and a pneumatic film actuator bracket 8 and a fastening seat 3 are respectively connected to the upper and lower ends of the valve body 5, and a valve seat 4 is clamped and fastened at the upper end of the fastening seat 3, and a sealing ring 301 is also fastened at the clamping point of the fastening seat 3 and the valve seat 4, and the sealing ring 301 is clamped at the bottom opening of the valve body 5. This structure can be fixed by fixing the fastening seat 3 and the valve body 5 by a flange structure. The valve seat 4 is installed firmly, and the sealing installation treatment of the fastening seat 3 is realized through the sealing ring 301. The lower end of the valve seat 4 is an open structure, and a filter screen 401 is inserted in the valve seat 4. This structure allows the valve seat 4 to be used for the installation and positioning treatment of the filter screen 401, so that the pneumatic valve body 1 can filter the materials flowing inside, reduce the degree of wear of the valve seat 4 and the valve core 2 by solid particles in the medium, and the valve seat coating 402 is sprayed on the outside of the valve seat 4, and the side of the valve seat 4 is spaced apart with material channels 403, and the middle part of the upper end of the valve seat 4 is provided with a conical hole that matches the valve core 2, and the upper end of the valve seat 4 is fastened and clamped with the valve seat positioning seat 11. This structure allows the valve core 2 and the valve seat 4 to be sealed through the conical structure to ensure the sealing, so that the pneumatic valve body 1 is more tightly closed, the valve seat positioning seat 11 is used for the installation and positioning of the valve seat 4, so that the valve seat 4 can be disassembled and processed, and the valve seat coating 402 on the valve seat 4 is easy to inspect and maintain, a valve core 2 matching with the valve seat 4 is arranged above the valve seat positioning seat 11, and the valve core coating 201 is sprayed on the outside of the valve core 2, so that the valve core 2 and the valve seat 4 are matched through the valve core coating 201 and the valve seat coating 402, a valve stem 10 is screwed and fixed on the upper end of the valve core 2, and the valve stem 10 runs through between the valve body 5 and the pneumatic diaphragm actuator bracket 8, a spring 9 is sleeved on the valve stem 10 in the pneumatic diaphragm actuator bracket 8, and a sealing packing 6 matching with the valve stem 10 is also arranged in the pneumatic diaphragm actuator bracket 8, and a pneumatic diaphragm actuator bracket 8 is installed with a pneumatic diaphragm actuator bracket 8 that acts on the valve stem 10 Film 801, this structure installs the pneumatic film 801 through the pneumatic film actuator bracket 8, so that the pneumatic film 801 pushes the valve stem 10 through the change of the upper and lower air pressures, and realizes the opening and closing of the pneumatic valve body 1. The spring 9 is a spring structure used for resetting on the existing valve stem structure. The sealing packing 6 seals the valve stem 10. The valve stem 10 is sleeved with a valve core seal 7, and the valve core seal 7 is in close contact with the upper end of the valve core 2, and the size of the valve core seal 7 is larger than the size of the valve seat 4. This structure allows the valve core seal 7 to seal the connection between the valve seat 4 and the valve seat positioning seat 11, and enhance the sealing performance of the valve core 2 and the valve seat 4 when they are closed. The valve core coating 201 and the valve seat coating 402 are both tungsten carbide coatings.It has high wear resistance and can effectively reduce the wear of the sealing surface between the valve core 2 and the valve seat 4 by solid particles in the medium, thereby avoiding affecting the sealing between the valve core 2 and the valve seat 4, extending the service life of the pneumatic valve body 1, and ensuring the reliability of the use of the pneumatic valve body 1.

[0018] Working principle: When using the pneumatic valve with tungsten carbide coating, the pneumatic valve body 1 first transmits the pressure signal to the pneumatic film 801 in the pneumatic film actuator bracket 8 through the pneumatic film actuator, so that the pneumatic film 801 acts on the valve stem 10 to achieve the movement of the valve stem 10. The sealing packing 6 is used for sealing when the valve stem 10 moves, so that the valve core 2 moves relative to the valve seat 4. The valve core coating 201 and the valve seat coating 402 cooperate between the valve core 2 and the valve seat 4 to achieve high wear resistance. When the valve core 2 is clamped in the valve seat 4, the valve core coating 201 and the valve seat coating 402 are in contact to achieve sealing, and the valve core seal 7 is pressed tightly against the valve seat positioning seat 11 to strengthen Sealing effect, at the same time, the pneumatic film 801 compresses the spring 9. When the pneumatic valve body 1 is opened, the spring 9 allows the pneumatic film 801 to gradually reset, so that the valve body 5 can circulate the medium through the feed channel 501 and the discharge channel 502. The medium enters the valve seat 4 through the material channel 403, and the solid particles in the medium are filtered by the filter screen 401. The fastening seat 3 is sealed relative to the valve body 5 through the sealing ring 301, and the valve seat 4 is detachably installed through the fastening seat 3, which improves the sealing effect of the pneumatic valve body 1 when it is closed, facilitates the maintenance of the pneumatic valve body 1, and effectively extends the service life of the pneumatic valve body 1, thereby completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic valve with a tungsten carbide coating, comprising a pneumatic valve body (1), characterized in that: The pneumatic valve body (1) is provided with a valve body (5), and a valve seat positioning seat (11) of an integral structure is provided in the valve body (5), and a feed channel (501) and a discharge channel (502) are respectively provided on both sides of the valve seat positioning seat (11) in the valve body (5), and the upper and lower ends of the valve body (5) are also provided with opening structures with flanges, and the upper and lower ends of the valve body (5) are respectively connected to a pneumatic diaphragm actuator bracket (8) and a fastening seat (3), the upper end of the fastening seat (3) is clamped and fastened with a valve seat (4), and the valve seat (4) is sprayed with a valve seat coating (402), and a material channel (403) is spaced apart on the side of the valve seat (4), and a valve core (2) matching with the valve seat (4) is provided above the valve seat positioning seat (11), and the valve core coating (201) is sprayed on the outside of the valve core (2), so that the valve core (2) and the valve seat (4) are matched through the valve core coating (201) and the valve seat coating (402).

2. A pneumatic valve with tungsten carbide coating according to claim 1, characterized in that: A valve stem (10) is screwed and fixed to the upper end of the valve core (2), and the valve stem (10) passes through the valve body (5) and the pneumatic diaphragm actuator bracket (8), a spring (9) is sleeved on the valve stem (10) in the pneumatic diaphragm actuator bracket (8), and a sealing packing (6) matching the valve stem (10) is also provided in the pneumatic diaphragm actuator bracket (8), and a pneumatic diaphragm (801) acting on the valve stem (10) is installed in the pneumatic diaphragm actuator bracket (8).

3. A pneumatic valve with tungsten carbide coating according to claim 1, characterized in that: A sealing ring (301) is also fastened on the clamping joint between the fastening seat (3) and the valve seat (4), and the sealing ring (301) is clamped on the bottom opening of the valve body (5).

4. The pneumatic valve with tungsten carbide coating according to claim 1, characterized in that: The lower end of the valve seat (4) is an open structure, and a filter screen (401) is inserted into the valve seat (4).

5. The pneumatic valve with tungsten carbide coating according to claim 1, characterized in that: A conical hole cooperating with the valve core (2) is provided in the middle of the upper end of the valve seat (4), and the upper end of the valve seat (4) is tightly clamped and engaged with the valve seat positioning seat (11).

6. The pneumatic valve with tungsten carbide coating according to claim 2, characterized in that: The valve stem (10) is sleeved with a valve core seal (7), the valve core seal (7) is in close contact with the upper end of the valve core (2), and the size of the valve core seal (7) is larger than the size of the valve seat (4).

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