Pneumatic lifting valve rod

Abstract

The utility model provides a pneumatic lifting valve rod, which belongs to the field of pneumatic valve rods and comprises a valve seat and an air cylinder fixedly connected to the top of the valve seat, the outer wall of the air cylinder is fixedly connected with an air pressure pipe, the air pressure pipe positioned on the outer wall of the air cylinder is connected with an external air compressor, a lubricating component is arranged above the valve seat, and a rotating component is arranged in the air cylinder. According to the utility model, through the arrangement of the piston and the lubricating oil storage bin, when the piston moves, air in the air cylinder is pushed to be conveyed into the lubricating oil storage bin through the pipeline and the three-way valve, so that lubricating oil in the lubricating oil storage bin is conveyed into the air cylinder through the bent pipe; the surface is contacted with lubricating oil, so that the friction force between the piston and the cylinder is reduced; the problem that when an existing valve rod moves frequently, large friction force is generated between an air cylinder and a piston, and consequently scratches appear on the surface of the air cylinder and the surface of the piston is solved.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic valve stems, and more specifically, to a pneumatic lifting valve stem. Background Art

[0002] A pneumatic lifting valve stem is a mechanical device that uses compressed air to control the opening and closing of a valve. It is widely used in occasions that require remote control or automatic control, such as the fields of petroleum, chemical industry, metallurgy, and water conservancy. The pneumatic lifting valve stem realizes the fast, stable and precise operation of the valve through the push of compressed air, thereby improving the safety and efficiency of the industrial process.

[0003] The main body of the pneumatic lifting valve stem is composed of a cylinder and a piston. When the valve stem moves up and down frequently, the piston will slide on the inner wall of the cylinder frequently. And because the outer wall of the piston contacts the inner wall of the cylinder, a large amount of frictional force will be generated during the frequent sliding process, resulting in scratches on the surfaces of both the piston and the cylinder, reducing the internal sealing effect of the cylinder and affecting the normal movement effect of the valve stem. How to solve these problems has become an urgent problem for those skilled in the art. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a pneumatic lifting valve stem, aiming to solve the problem that when the existing valve stem moves frequently, the frictional force between the cylinder and the piston is large, resulting in scratches on the surfaces of the cylinder and the piston.

[0005] The utility model is realized as follows:

[0006] The utility model provides a pneumatic lifting valve stem, which includes a valve seat, and a cylinder fixedly connected to the top of the valve seat. An air pressure pipe is fixedly connected to the outer wall of the cylinder, and the air pressure pipe located on the outer wall of the cylinder is connected to an external air compressor. A lubrication assembly is arranged above the valve seat, and a rotation assembly is arranged inside the cylinder.

[0007] The lubrication assembly includes a pneumatic valve stem, a piston, a pipe, a three-way valve, a lubricating oil storage bin and a bent pipe. The pneumatic valve stem is installed inside the cylinder, the piston is installed inside the cylinder, the pipe is fixedly connected to the top of the cylinder, the three-way valve is arranged outside the cylinder, the lubricating oil storage bin is fixedly connected to the outer wall of the cylinder, and the bent pipe is fixedly connected to the bottom of the lubricating oil storage bin.

[0008] Preferably, the outer wall of the piston is slidably connected to the inner wall of the cylinder, and a sealing ring is installed on the outer wall of the piston.

[0009] By adopting the above technical solution, the piston can move inside the cylinder, and the presence of the sealing ring can ensure the sealing effect between the piston and the cylinder.

[0010] Preferably, an inclined plate is fixedly connected to the top of the piston, and the bottom of the piston is rotatably connected to the top end of the pneumatic valve rod.

[0011] By adopting the above technical solution, the presence of the inclined plate can block the lubricating oil, preventing the lubricating oil from flowing to the top of the piston and resulting in poor lubrication effect of the lubricating oil on the inner wall of the cylinder. The piston can drive the pneumatic valve rod to move and can rotate on the top of the pneumatic valve rod.

[0012] Preferably, one end of the pipeline is communicated with the inside of the cylinder, the other end of the pipeline away from the cylinder is connected to a three-way valve, the three-way valve is located at the top of the lubricating oil storage bin and is communicated with the lubricating oil storage bin, and the end of the elbow pipe away from the lubricating oil storage bin is communicated with the inside of the cylinder.

[0013] By adopting the above technical solution, the air inside the cylinder will be pushed by the piston and transported to the inside of the lubricating oil storage bin through the pipeline and the three-way valve, and the lubricating oil inside the lubricating oil storage bin will be transported to the inside of the cylinder through the elbow pipe.

[0014] Preferably, the rotating assembly includes a housing, a threaded column, a lifting plate, a moving plate, a slide rail and a sliding plate. The housing is fixedly connected to the top of the piston, the threaded column is installed on the top of the housing, the lifting plate is fixedly connected to the top end of the threaded column, the moving plate is fixedly connected to the outer wall of the lifting plate, the slide rail is opened on the inner wall of the cylinder, and the sliding plate is arranged inside the slide rail.

[0015] Preferably, the bottom end of the threaded column penetrates through the top end of the housing and extends into the inside of the housing, and the thread provided on the outer wall of the threaded column is adapted to the inner wall of the housing.

[0016] By adopting the above technical solution, when the threaded column cannot move, the housing will drive the piston to rotate and move on the outer wall of the threaded column under the action of the thread.

[0017] Preferably, the outer wall of the moving plate is slidably connected to the inner wall of the cylinder, the outer wall of the sliding plate is fixedly connected to the outer wall of the moving plate and is slidably connected to the inner wall of the slide rail.

[0018] By adopting the above technical solution, the lifting plate can drive the sliding plate to move inside the slide rail through the moving plate, and the sliding plate and the slide rail can ensure the stability of the vertical movement of the lifting plate.

[0019] The beneficial effects of the present utility model are:

[0020] 1. By setting a piston and a lubricating oil storage bin, when the piston moves, it will push the air inside the cylinder through a pipeline and a three-way valve to the inside of the lubricating oil storage bin, so that the lubricating oil inside the lubricating oil storage bin is transported to the inside of the cylinder through a bent pipe. When the piston moves, its surface will come into contact with the lubricating oil, thereby reducing the friction between the piston and the cylinder; this solves the problem that when the existing valve stem moves frequently, a large friction is generated between the cylinder and the piston, resulting in scratches on both the surface of the cylinder and the surface of the piston.

[0021] 2. By setting a housing and a threaded column, when the piston pushes the lifting plate to move to the top of the inner wall of the cylinder through the housing and the threaded column, when the piston continues to rise, the housing will drive the piston to rotate under the action of the threaded column, so that the lubricating oil on the surface of the piston is evenly smeared on the inner wall of the cylinder, ensuring the lubrication effect of the lubricating oil on the piston. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 is an overall structural schematic diagram of a pneumatic lifting valve stem provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the internal structure of the cylinder of a pneumatic lifting valve stem provided by an embodiment of the present invention;

[0025] Figure 3 is the present invention Figure 2 is an enlarged schematic diagram of the structure at A in the present invention;

[0026] Figure 4 is a schematic diagram of the structure of the lubricating oil storage bin of a pneumatic lifting valve stem provided by an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of the structure of the cylinder of a pneumatic lifting valve stem provided by an embodiment of the present invention.

[0028] In the figure: 1. Valve seat; 2. Cylinder; 3. Lubricating component; 301. Pneumatic valve stem; 302. Piston; 303. Pipeline; 304. Three-way valve; 305. Lubricating oil storage bin; 306. Bent pipe; 4. Rotating component; 401. Housing; 402. Threaded column; 403. Lifting plate; 404. Moving plate; 405. Slide rail; 406. Slide plate. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Referring to Figures 1-5 , a pneumatic lift valve stem includes a valve seat 1 and a cylinder 2 fixedly connected to the top of the valve seat 1. An air pressure pipe is fixedly connected to the outer wall of the cylinder 2, and the air pressure pipe located on the outer wall of the cylinder 2 is connected to an external air compressor. A lubrication assembly 3 is arranged above the valve seat 1, and a rotation assembly 4 is arranged inside the cylinder 2.

[0031] The lubrication assembly 3 includes a pneumatic valve stem 301, a piston 302, a pipe 303, a three-way valve 304, a lubricating oil storage bin 305, and a bent pipe 306. The pneumatic valve stem 301 is installed inside the cylinder 2, and the piston 302 is installed inside the cylinder 2. The outer wall of the piston 302 is slidably connected to the inner wall of the cylinder 2. A sealing ring is installed on the outer wall of the piston 302. The piston 302 can move inside the cylinder 2. The presence of the sealing ring can ensure the sealing effect between the piston 302 and the cylinder 2. A sloping plate is fixedly connected to the top of the piston 302. The presence of the sloping plate can block the lubricating oil and prevent the lubricating oil from flowing to the top of the piston 302, resulting in poor lubrication effect of the inner wall of the cylinder 2 by the lubricating oil. The bottom of the piston 302 is rotatably connected to the top end of the pneumatic valve stem 301. The piston 302 can drive the pneumatic valve stem 301 to move and can rotate on the top of the pneumatic valve stem 301. The pipe 303 is fixedly connected to the top of the cylinder 2. One end of the pipe 303 is communicated with the inside of the cylinder 2. The three-way valve 304 is arranged outside the cylinder 2. The end of the pipe 303 away from the cylinder 2 is connected to the three-way valve 304. The lubricating oil storage bin 305 is fixedly connected to the outer wall of the cylinder 2. The three-way valve 304 is located on the top of the lubricating oil storage bin 305 and is communicated with the lubricating oil storage bin 305. The bent pipe 306 is fixedly connected to the bottom of the lubricating oil storage bin 305. The end of the bent pipe 306 away from the lubricating oil storage bin 305 is communicated with the inside of the cylinder 2. The air inside the cylinder 2 will be pushed by the piston 302 and transported to the inside of the lubricating oil storage bin 305 through the pipe 303 and the three-way valve 304. The lubricating oil inside the lubricating oil storage bin 305 will be transported to the inside of the cylinder 2 through the bent pipe 306.

[0032] By setting the piston 302 and the lubricating oil storage chamber 305, when the piston 302 moves, it will push the air inside the cylinder 2 through the pipeline 303 and the three-way valve 304 to the inside of the lubricating oil storage chamber 305, so that the lubricating oil inside the lubricating oil storage chamber 305 is transported to the inside of the cylinder 2 through the elbow pipe 306, so that when the piston 302 moves, its surface will come into contact with the lubricating oil, thereby reducing the friction between the piston 302 and the cylinder 2; to solve the problem that when the existing valve stem moves frequently, a large friction is generated between the cylinder 2 and the piston 302, resulting in scratches on the surfaces of both the cylinder 2 and the piston 302.

[0033] The rotating assembly 4 includes a housing 401, a threaded column 402, a lifting plate 403, a moving plate 404, a slide rail 405 and a sliding plate 406. The housing 401 is fixedly connected to the top of the piston 302. The threaded column 402 is installed on the top of the housing 401. The bottom end of the threaded column 402 penetrates the top end of the housing 401 and extends into the inside of the housing 401. The thread provided on the outer wall of the threaded column 402 is adapted to the inner wall of the housing 401. When the threaded column 402 cannot move, the housing 401 will drive the piston 302 to rotate and move on the outer wall of the threaded column 402 under the action of the thread. The lifting plate 403 is fixedly connected to the top end of the threaded column 402. The moving plate 404 is fixedly connected to the outer wall of the lifting plate 403. The outer wall of the moving plate 404 is slidably connected to the inner wall of the cylinder 2. The slide rail 405 is provided on the inner wall of the cylinder 2. The lifting plate 403 can drive the sliding plate 406 to move inside the slide rail 405 through the moving plate 404. The sliding plate 406 is arranged inside the slide rail 405. The outer wall of the sliding plate 406 is fixedly connected to the outer wall of the moving plate 404 and is slidably connected to the inner wall of the slide rail 405. The sliding plate 406 and the slide rail 405 can ensure the stability of the vertical movement of the lifting plate 403.

[0034] By setting the housing 401 and the threaded column 402, when the piston 302 pushes the lifting plate 403 to move to the top of the inner wall of the cylinder 2 through the housing 401 and the threaded column 402, and the piston 302 continues to rise, the housing 401 will drive the piston 302 to rotate under the action of the threaded column 402, so that the lubricating oil on the surface of the piston 302 is evenly smeared on the inner wall of the cylinder 2, ensuring the lubrication effect of the lubricating oil on the piston 302.

[0035] The working principle of this pneumatic lifting valve stem: When the external air compressor conveys high-pressure air to the inside of the cylinder 2 through the pneumatic pipe, the piston 302 drives the pneumatic valve stem 301 to rise. At this time, the air inside the cylinder 2 above the piston 302 will be conveyed to the inside of the lubricating oil storage bin 305 through the pipe 303 and the three-way valve 304, so that the lubricating oil inside the lubricating oil storage bin 305 is conveyed to the inside of the cylinder 2 through the elbow pipe 306. When the piston 302 moves, it contacts the lubricating oil until the top of the lifting plate 403 abuts against the top of the inner wall of the cylinder 2.

[0036] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pneumatic lift valve stem, comprising a valve seat (1) and a cylinder (2) fixedly connected to the top of the valve seat (1), characterized in that: The outer wall of the cylinder (2) is fixedly connected with a pneumatic tube, and the pneumatic tube located on the outer wall of the cylinder (2) is connected to an external air compressor. A lubrication assembly (3) is arranged above the valve seat (1), and a rotating assembly (4) is arranged inside the cylinder (2). The lubrication assembly (3) includes a pneumatic valve rod (301), a piston (302), a pipe (303), a three-way valve (304), a lubricating oil storage bin (305) and a bent pipe (306). The pneumatic valve rod (301) is installed inside the cylinder (2), the piston (302) is installed inside the cylinder (2), the pipe (303) is fixedly connected to the top of the cylinder (2), the three-way valve (304) is arranged outside the cylinder (2), the lubricating oil storage bin (305) is fixedly connected to the outer wall of the cylinder (2), and the bent pipe (306) is fixedly connected to the bottom of the lubricating oil storage bin (305).

2. The pneumatic lift valve stem according to claim 1, characterized in that: The outer wall of the piston (302) is slidably connected to the inner wall of the cylinder (2), and a sealing ring is installed on the outer wall of the piston (302).

3. The pneumatic lift valve stem according to claim 2, characterized in that: The top of the piston (302) is fixedly connected with an inclined plate, and the bottom of the piston (302) is rotatably connected to the top end of the pneumatic valve rod (301).

4. A pneumatic lift valve stem according to claim 3, characterized in that: One end of the pipe (303) is communicated with the inside of the cylinder (2), the end of the pipe (303) far away from the cylinder (2) is connected to the three-way valve (304). The three-way valve (304) is located on the top of the lubricating oil storage bin (305) and is communicated with the lubricating oil storage bin (305). The end of the bent pipe (306) far away from the lubricating oil storage bin (305) is communicated with the inside of the cylinder (2).

5. A pneumatic lift valve stem according to claim 1, characterized in that: The rotating assembly (4) includes a housing (401), a threaded column (402), a lifting plate (403), a moving plate (404), a slide rail (405) and a sliding plate (406). The housing (401) is fixedly connected to the top of the piston (302), the threaded column (402) is installed on the top of the housing (401), the lifting plate (403) is fixedly connected to the top end of the threaded column (402), the moving plate (404) is fixedly connected to the outer wall of the lifting plate (403), the slide rail (405) is opened on the inner wall of the cylinder (2), and the sliding plate (406) is arranged inside the slide rail (405).

6. The pneumatic lift valve stem according to claim 5, wherein: The bottom end of the threaded column (402) penetrates through the top end of the housing (401) and extends into the inside of the housing (401). The thread provided on the outer wall of the threaded column (402) is adapted to the inner wall of the housing (401).

7. A pneumatic lift valve stem according to claim 6, characterized in that: The outer wall of the moving plate (404) is slidably connected to the inner wall of the cylinder (2). The outer wall of the sliding plate (406) is fixedly connected to the outer wall of the moving plate (404) and is slidably connected to the inner wall of the slide rail (405).

Images