Low-temperature pneumatic valve

Abstract

The utility model relates to the technical field of pneumatic valves, and discloses a low-temperature pneumatic valve which comprises a valve body, a wear-resisting assembly is arranged on the periphery of the valve body and used for improving the wear resistance of the valve, a pneumatic actuator is arranged on the top of the valve body, a valve rod is fixedly connected to the bottom of the pneumatic actuator, and a valve rod is arranged on the valve rod. The periphery of the valve rod is fixedly connected into the valve body, the bottom end of the valve rod is fixedly connected with a valve element, the bottom of the valve body is fixedly connected with a connecting rod, the bottom of the connecting rod abuts against a bottom plate, and the top of the bottom plate is fixedly connected with a first fixing rod. According to the utility model, the buffer plate has elasticity through the spring I, so that the influence of fluid on the valve is reduced, the valve can stably and reliably operate, the service life of the valve is prolonged, and the hardness and the wear resistance of the valve can be enhanced by coating the periphery of the valve body with the polytetrafluoroethylene coating and the aluminum oxide ceramic coating.

Description

Technical Field

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

[0002] A pneumatic valve is a valve that controls the flow of fluid using the principle of pneumatics. A cryogenic pneumatic valve is a valve system specifically designed to operate in a cryogenic environment, capable of withstanding extreme low temperatures and maintaining stable performance for handling cryogenic liquids or gases;

[0003] A cryogenic pneumatic valve includes a valve body, which is the main part of the valve. A cryogenic pneumatic valve includes a valve stem, which is a key component connecting the handle or actuator to the valve core inside the valve. A cryogenic pneumatic valve includes a pneumatic actuator, which is used to control the opening and closing of the valve core;

[0004] The existing cryogenic pneumatic valves lack a buffer structure, resulting in a large impact force during the opening or closing process of the valve under the control of the pneumatic actuator due to the absence of a buffer structure, leading to equipment damage or system failure. For this reason, a cryogenic pneumatic valve is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a cryogenic pneumatic valve, aiming to improve the problem of large impact force generated when closing the valve due to the lack of a buffer structure in the existing technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A cryogenic pneumatic valve includes a valve body. A wear-resistant component is arranged on the outer periphery of the valve body, and the wear-resistant component is used to improve the wear resistance of the valve. An pneumatic actuator is arranged on the top of the valve body. The bottom of the pneumatic actuator is fixedly connected with a valve stem. The outer periphery of the valve stem is fixedly connected inside the valve body. The bottom end of the valve stem is fixedly connected with a valve core. The bottom of the valve body is fixedly connected with a connecting rod. The bottom of the connecting rod abuts against a bottom plate. A first fixing rod is fixedly connected to the top of the bottom plate. The top end of the first fixing rod is slidably connected with a buffer plate. A first spring is fixedly connected to the bottom of the buffer plate. The bottom end of the first spring is fixedly connected to the top of the bottom plate. Fixed blocks are slidably connected to the left and right sides inside the bottom plate. A pressing block is fixedly connected to the bottom of the fixed block. The side of the fixed block away from the connecting rod is slidably connected with a second fixing rod. The side of the second fixing rod away from the fixed block is fixedly connected inside the bottom plate. A second spring is fixedly connected to the side of the fixed block away from the connecting rod. The end of the second spring away from the fixed block is fixedly connected inside the bottom plate;

[0008] As a further description of the above technical solution:

[0009] The wear-resistant component includes a polytetrafluoroethylene coating, which is coated on the outer periphery of the valve body, and an alumina ceramic coating is coated on the outer periphery of the polytetrafluoroethylene coating;

[0010] As a further description of the above technical solution:

[0011] The outer periphery of the buffer plate is slidably connected inside the connecting rod, the first spring is sleeved on the outer periphery of the first fixing rod, and the second spring is sleeved on the outer periphery of the second fixing rod;

[0012] As a further description of the above technical solution:

[0013] Chutes are provided on both the left and right sides inside the connecting rod, and the side of the fixing block away from the second fixing rod is slidably connected in the chute inside the connecting rod;

[0014] As a further description of the above technical solution:

[0015] One end of the second fixing rod away from the bottom plate is fixedly connected with a first limiting plate, and the outer periphery of the first limiting plate is slidably connected inside the fixing block;

[0016] As a further description of the above technical solution:

[0017] The top end of the first fixing rod is fixedly connected with a second limiting plate, and the outer periphery of the second limiting plate is slidably connected inside the buffer plate;

[0018] As a further description of the above technical solution:

[0019] A rubber pad is fixedly connected to the outer periphery of the buffer plate;

[0020] As a further description of the above technical solution:

[0021] Both the left and right sides of the outer periphery of the valve body are fixedly connected with mounting plates, and a plurality of uniformly distributed mounting holes are provided inside the mounting plates.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the buffer plate can be made elastic through the first spring, thereby reducing the influence of the fluid on the valve, ensuring that the valve can operate stably and reliably, extending its service life. Pressing the pressing block can drive the fixing block to move, and after releasing the fixation of the bottom plate, the bottom plate can be disassembled, which is convenient for inspecting the first spring and the buffer plate to prevent the buffer effect from decreasing and affecting the use of the valve. Releasing the pressing block, the elastic force of the second spring drives the fixing block to reset and fix the bottom plate.

[0024] 2. In the present utility model, by applying a polytetrafluoroethylene coating on the outer periphery of the valve body, not only can the low-temperature resistance of the valve be increased, but also the wear resistance and corrosion resistance of the valve can be enhanced. By applying an alumina ceramic coating on the outer periphery of the polytetrafluoroethylene coating, the hardness and wear resistance of the valve can be improved, making it suitable for high-friction environments at low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a three-dimensional schematic diagram of a low-temperature pneumatic valve proposed by the present utility model;

[0026] Figure 2 FIG. is a structural schematic diagram of the valve body of a low-temperature pneumatic valve proposed by the present utility model;

[0027] Figure 3 FIG. is a structural schematic diagram of the connecting rod of a low-temperature pneumatic valve proposed by the present utility model;

[0028] Figure 4 is Figure 3 the enlarged view of part A in

[0029] Figure 5 FIG. is a structural schematic diagram of the fixing block of a low-temperature pneumatic valve proposed by the present utility model;

[0030] Figure 6 FIG. is a structural schematic diagram of the buffer plate of a low-temperature pneumatic valve proposed by the present utility model.

[0031] LEGEND DESCRIPTION:

[0032] 1. Valve body; 2. Pneumatic actuator; 3. Valve stem; 4. Valve core; 5. Connecting rod; 6. Bottom plate; 7. First fixing rod; 8. Buffer plate; 9. First spring; 10. Pressing block; 11. Fixing block; 12. Second fixing rod; 13. Second spring; 14. Polytetrafluoroethylene coating; 15. Alumina ceramic coating; 16. First limiting plate; 17. Second limiting plate; 18. Rubber pad; 19. Mounting plate; 20. Mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all 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.

[0034] Refer to Figure 1 - Figure 4, an embodiment provided by the present utility model: a low-temperature pneumatic valve, including a valve body 1, a pneumatic actuator 2 is arranged at the top of the valve body 1, the bottom of the pneumatic actuator 2 is fixedly connected with a valve stem 3, the outer periphery of the valve stem 3 is fixedly connected inside the valve body 1, the bottom end of the valve stem 3 is fixedly connected with a valve core 4, the bottom of the valve body 1 is fixedly connected with a connecting rod 5, the bottom of the connecting rod 5 abuts against a bottom plate 6, a first fixing rod 7 is fixedly connected to the top of the bottom plate 6, the top end of the first fixing rod 7 is slidably connected with a buffer plate 8, a first spring 9 is fixedly connected to the bottom of the buffer plate 8, the bottom end of the first spring 9 is fixedly connected to the top of the bottom plate 6, fixing blocks 11 are slidably connected to the left and right sides inside the bottom plate 6, a pressing block 10 is fixedly connected to the bottom of the fixing block 11, a second fixing rod 12 is slidably connected to the side of the fixing block 11 away from the connecting rod 5, the side of the second fixing rod 12 away from the fixing block 11 is fixedly connected inside the bottom plate 6, a second spring 13 is fixedly connected to the side of the fixing block 11 away from the connecting rod 5, and the end of the second spring 13 away from the fixing block 11 is fixedly connected inside the bottom plate 6. The valve body 1 is used to fix the valve stem 3, the pneumatic actuator 2 is used to drive the valve core 4 to rotate, the valve stem 3 is used to fix the pneumatic actuator 2, the valve core 4 is used to control the opening and closing of the fluid passage, the connecting rod 5 is used to fix the bottom plate 6, the bottom plate 6 is used to fix the first fixing rod 7, the first fixing rod 7 is used to fix the buffer plate 8, the buffer plate 8 is used to improve the buffering effect of the valve, the first spring 9 can make the buffer plate 8 elastic, the pressing block 10 is used to drive the fixing block 11 to move, the fixing block 11 is used to fix the bottom plate 6, the second fixing rod 12 is used to fix the fixing block 11, and the second spring 13 can drive the fixing block 11 to reset by its elastic force.

[0035] Referring to Figure 1 and Figure 2 , a wear-resistant component is arranged on the outer periphery of the valve body 1, and the wear-resistant component is used to improve the wear resistance of the valve. The wear-resistant component includes a polytetrafluoroethylene coating 14, the polytetrafluoroethylene coating 14 is coated on the outer periphery of the valve body 1, and an alumina ceramic coating 15 is coated on the outer periphery of the polytetrafluoroethylene coating 14. The polytetrafluoroethylene coating 14 can not only increase the low-temperature resistance of the valve, but also increase the wear resistance and corrosion resistance of the valve. The alumina ceramic coating 15 can enhance the hardness and wear resistance of the valve, making it suitable for high-friction environments at low temperatures.

[0036] Referring to Figure 1 , Figure 5 and Figure 6, The outer periphery of the buffer plate 8 is slidably connected to the inside of the connecting rod 5. The first spring 9 is sleeved on the outer periphery of the first fixed rod 7, and the second spring 13 is sleeved on the outer periphery of the second fixed rod 12. Chutes are provided on both the left and right sides inside the connecting rod 5. The side of the fixed block 11 away from the second fixed rod 12 is slidably connected to the chute inside the connecting rod 5. One end of the second fixed rod 12 away from the bottom plate 6 is fixedly connected to a first limiting plate 16. The outer periphery of the first limiting plate 16 is slidably connected to the inside of the fixed block 11. The top end of the first fixed rod 7 is fixedly connected to a second limiting plate 17. The outer periphery of the second limiting plate 17 is slidably connected to the inside of the buffer plate 8. A rubber pad 18 is fixedly connected to the outer periphery of the buffer plate 8. Installation plates 19 are fixedly connected to both the left and right sides of the outer periphery of the valve body 1. A plurality of uniformly distributed installation holes 20 are provided inside the installation plates 19. The first limiting plate 16 serves to prevent the second fixed rod 12 from falling off the inside of the fixed block 11. The second limiting plate 17 serves to prevent the buffer plate 8 from falling off one end of the first fixed rod 7. The rubber pad 18 is used to increase the sealing performance of the buffer plate 8. The installation plates 19 are used to install the valve body 1. The installation holes 20 are used to install the installation plates 19.

[0037] Working principle: The buffer plate 8 can be made elastic through the first spring 9, thereby reducing the impact of the fluid on the valve, ensuring the stable and reliable operation of the valve, and extending its service life. Pressing the pressing block 10 can drive the fixed block 11 to move. The fixed block 11 can release the fixation of the bottom plate 6 through movement. After releasing the fixation of the bottom plate 6, the bottom plate 6 can be disassembled. Disassembling the bottom plate 6 can facilitate the inspection of the first spring 9 and the buffer plate 8 to prevent the reduction of its buffering effect from affecting the normal use of the valve. Releasing the pressing block 10 can drive the fixed block 11 to reset through the elastic force of the second spring 13. The fixed block 11 can fix the bottom plate 6 through reset. Coating the outer periphery of the valve body 1 with a polytetrafluoroethylene coating 14 can not only increase the low-temperature resistance of the valve, but also increase the wear resistance and corrosion resistance of the valve. Coating an alumina ceramic coating 15 on the outer periphery of the polytetrafluoroethylene coating 14 can enhance the hardness and wear resistance of the valve, making it suitable for high-friction environments at low temperatures.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-temperature pneumatic valve, comprising a valve body (1), characterized in that: An abrasion-resistant component is provided on the outer periphery of the valve body (1). The abrasion-resistant component is used to improve the abrasion resistance of the valve. An air actuator (2) is provided on the top of the valve body (1). The bottom of the air actuator (2) is fixedly connected to a valve stem (3). The outer periphery of the valve stem (3) is fixedly connected inside the valve body (1). The bottom end of the valve stem (3) is fixedly connected to a valve core (4). The bottom of the valve body (1) is fixedly connected to a connecting rod (5). The bottom of the connecting rod (5) abuts against a bottom plate (6). A first fixing rod (7) is fixedly connected to the top of the bottom plate (6). The top end of the first fixing rod (7) is slidably connected to a buffer plate (8). A first spring (9) is fixedly connected to the bottom of the buffer plate (8). The bottom end of the first spring (9) is fixedly connected to the top of the bottom plate (6). Fixing blocks (11) are slidably connected to the left and right sides inside the bottom plate (6). A pressing block (10) is fixedly connected to the bottom of the fixing block (11). A second fixing rod (12) is slidably connected to the side of the fixing block (11) away from the connecting rod (5). The side of the second fixing rod (12) away from the fixing block (11) is fixedly connected inside the bottom plate (6). A second spring (13) is fixedly connected to the side of the fixing block (11) away from the connecting rod (5). The end of the second spring (13) away from the fixing block (11) is fixedly connected inside the bottom plate (6).

2. The cryogenic pneumatic valve according to claim 1, characterized in that: The abrasion-resistant component includes a polytetrafluoroethylene coating (14). The polytetrafluoroethylene coating (14) is coated on the outer periphery of the valve body (1). An alumina ceramic coating (15) is coated on the outer periphery of the polytetrafluoroethylene coating (14).

3. A cryogenic pneumatic valve according to claim 1, characterized in that: The outer periphery of the buffer plate (8) is slidably connected inside the connecting rod (5). The first spring (9) is sleeved on the outer periphery of the first fixing rod (7). The second spring (13) is sleeved on the outer periphery of the second fixing rod (12).

4. The cryogenic pneumatic valve according to claim 1, wherein: Chutes are provided on the left and right sides inside the connecting rod (5). The side of the fixing block (11) away from the second fixing rod (12) is slidably connected in the chutes inside the connecting rod (5).

5. A cryogenic pneumatic valve according to claim 1, characterized in that: A first limiting plate (16) is fixedly connected to the end of the second fixing rod (12) away from the bottom plate (6). The outer periphery of the first limiting plate (16) is slidably connected inside the fixing block (11).

6. A cryogenic pneumatic valve according to claim 1, characterized in that: A second limiting plate (17) is fixedly connected to the top end of the first fixing rod (7). The outer periphery of the second limiting plate (17) is slidably connected inside the buffer plate (8).

7. The cryogenic pneumatic valve according to claim 1, characterized in that: A rubber pad (18) is fixedly connected to the outer periphery of the buffer plate (8).

8. A cryogenic pneumatic valve according to claim 1, characterized in that: Mounting plates (19) are fixedly connected to the left and right sides of the outer periphery of the valve body (1). A plurality of uniformly distributed mounting holes (20) are provided inside the mounting plates (19).

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