Special program-controlled pneumatic adjusting butterfly valve for VPSA oxygen production

Abstract

The utility model discloses a special program-controlled pneumatic regulating butterfly valve for VPSA (Vacuum Pressure Swing Adsorption) oxygen production, which comprises a valve body, the top surface of the valve body is connected with a valve cover, the top surface of the valve body is provided with an actuator fixing bracket, the top surface of the actuator fixing bracket is provided with a pneumatic regulating actuator, and the output end of the pneumatic regulating actuator is in transmission connection with a connecting shaft; the connecting shaft rotationally penetrates through the actuator fixing support, the tail end of the connecting shaft is connected with the valve rod, the valve rod rotationally penetrates through the valve cover and is rotationally connected into the valve body, the outer edge of the valve rod is sleeved with the butterfly plate, and the butterfly plate is movably connected into the valve body. The pneumatic adjusting actuator is arranged on the valve body and connected with the valve rod through the connecting shaft, so that the butterfly plate can be accurately adjusted in a large range, meanwhile, the pneumatic adjusting valve is simple in structure and low in manufacturing cost, an imported adjusting valve is replaced, cost is saved, and the pneumatic adjusting valve is suitable for large-scale popularization and application. And meanwhile, the valve body is high in response speed and efficient, the valve rod and the butterfly plate are stably connected through the limiting piece, and therefore the butterfly plate in the valve body can be conveniently maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen production equipment, in particular to a program-controlled pneumatic regulating butterfly valve dedicated to VPSA oxygen production. Background Art

[0002] A VPSA oxygen generator is a complete set of equipment that uses air as raw material to produce oxygen (or liquid oxygen), nitrogen (or liquid nitrogen), and mixed gases such as argon, neon-helium, krypton-xenon, etc. When adjusting the oxygen in the oxygen generator, a VPSA automatic control regulating valve is usually connected to the outlet to achieve the adjustment of oxygen. However, this regulating valve can only be imported from foreign countries, with high costs and a relatively small adjustment range. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a program-controlled pneumatic regulating butterfly valve dedicated to VPSA oxygen production is proposed.

[0004] To achieve the above purpose, the utility model adopts the following technical solution: a program-controlled pneumatic regulating butterfly valve dedicated to VPSA oxygen production, including a valve body. The top surface of the valve body is connected to a valve cover through a first bolt, and an actuator fixing bracket is fixed to the top surface of the valve body through a second bolt. A pneumatic regulating actuator is provided on the top surface of the actuator fixing bracket. The output end of the pneumatic regulating actuator is drivingly connected to a connecting shaft. The connecting shaft rotates through the actuator fixing bracket. The end of the connecting shaft is connected to a valve stem. The valve stem rotates through the valve cover and is rotatably connected to the valve body. A butterfly plate is sleeved on the outer edge of the valve stem, and the butterfly plate is movably connected to the valve body.

[0005] As a further description of the above technical solution: the butterfly plate radially penetrates an installation hole, and the butterfly plate is sleeved on the outer edge of the valve stem through the installation hole. Two axially symmetric and mirror-symmetrical through holes communicating with the installation hole are axially opened on the outer side of the butterfly plate. Two mirror-symmetrical positioning holes are radially penetrated through the outer edge of the valve stem. Two axially symmetric and mirror-symmetrical positioning grooves are radially opened on the inner wall of the installation hole. Each through hole is movably penetrated by a wedge pin. The wedge pin passes through the positioning hole and is inserted into the positioning groove. The ends of the two wedge pins are jointly fixed to a fixing plate. A countersunk hole communicating with the upper through hole is radially opened at the top of the butterfly plate, and a limiting member is movably connected in the countersunk hole.

[0006] As a further description of the above technical solution: The limiting member includes a pull rod movably inserted into the countersunk hole. One end of the pull rod is fixedly connected to a pull block. A receiving groove concentric with the countersunk hole is radially formed on the inner wall of the positioning hole at the upper end. A magnetic block is movably connected in the receiving groove. The magnetic block is fixedly connected to the end of the pull rod. A spring is arranged in the receiving groove. The spring is sleeved on the outer edge of the pull rod. A groove adapted to the magnetic block is radially formed on the outer edge of the wedge pin. The magnetic block is magnetically and movably inserted into the positioning groove. The wedge pin is made of metal material.

[0007] As a further description of the above technical solution: An annular clamping groove concentric with the butterfly plate is formed on the inner side of the valve body. A sealing ring is fixedly embedded in the annular clamping groove.

[0008] As a further description of the above technical solution: The lower end outer edge of the valve stem is sleeved with a lower shaft sleeve. A tapered roller bearing is arranged below the lower shaft sleeve. The tapered roller bearing is sleeved on the outside of the valve stem. Both the tapered roller bearing and the lower shaft sleeve are movably connected to the lower end of the valve body.

[0009] As a further description of the above technical solution: The upper end outer edge of the valve stem is sleeved with an upper shaft sleeve. A packing set is arranged at the upper end of the upper shaft sleeve. The packing set is sleeved on the outer edge of the valve stem. Both the upper shaft sleeve and the packing set are movably connected in the valve body.

[0010] The utility model has the following beneficial effects:

[0011] Compared with the prior art, for the VPSA oxygen production special program-controlled pneumatic regulating butterfly valve, by arranging a pneumatic regulating actuator on the valve body and connecting it to the valve stem through a connecting shaft, the butterfly plate can be accurately adjusted within a large range. At the same time, the device has a simple structure and low manufacturing cost, replacing imported regulating valves, thus saving costs. At the same time, the valve body has a fast response speed, high efficiency and stability. The valve stem and the butterfly plate are connected through a limiting member, which is convenient for maintaining the butterfly plate in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional overall structure diagram of a VPSA oxygen production special program-controlled pneumatic regulating butterfly valve proposed by the utility model;

[0013] Figure 2 is a cross-sectional view of the overall structure of a VPSA oxygen production special program-controlled pneumatic regulating butterfly valve proposed by the utility model;

[0014] Figure 3 is a Figure 2 magnified view of the structure at A in a VPSA oxygen production special program-controlled pneumatic regulating butterfly valve proposed by the utility model;

[0015] Figure 4 For a structure enlarged view of the B position in a Figure 2 programmable pneumatic regulating butterfly valve dedicated to VPSA oxygen generation proposed by the present utility model;

[0016] Figure 5 For a structure enlarged view of the C position in a Figure 2 programmable pneumatic regulating butterfly valve dedicated to VPSA oxygen generation proposed by the present utility model;

[0017] Figure 6 For a structure enlarged view of the D position in a Figure 4 programmable pneumatic regulating butterfly valve dedicated to VPSA oxygen generation proposed by the present utility model.

[0018] Legend description:

[0019] 1. Pneumatic regulating actuator; 2. Actuator fixing bracket; 3. Connecting shaft; 4. Valve stem; 5. Valve body; 6. Butterfly plate; 7. Valve cover; 8. Lower shaft sleeve; 9. Tapered roller bearing; 10. Annular slot; 11. Sealing ring; 12. Upper shaft sleeve; 13. Pulling block; 14. Countersunk hole; 15. Pull rod; 16. Fixing plate; 17. Through hole; 18. Positioning hole; 19. Wedge pin; 20. Positioning groove; 21. Packing group; 22. Receiving groove; 23. Spring; 24. Groove; 25. Magnet. Specific embodiments

[0020] Next, with reference to the drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0021] Refer to Figures 1 to 6 , a programmable pneumatic regulating butterfly valve dedicated to VPSA oxygen generation provided by the present utility model: including a valve body 5, a valve cover 7 is connected to the top surface of the valve body 5 through a first bolt, an actuator fixing bracket 2 is fixed to the top surface of the valve body 5 through a second bolt, a pneumatic regulating actuator 1 is provided on the top surface of the actuator fixing bracket 2, the output end of the pneumatic regulating actuator 1 is drivingly connected to a connecting shaft 3, the connecting shaft 3 rotates through the actuator fixing bracket 2, the end of the connecting shaft 3 is connected to a valve stem 4, the valve stem 4 rotates through the valve cover 7 and is rotatably connected within the valve body 5, the outer edge of the valve stem 4 is sleeved with a butterfly plate 6, the butterfly plate 6 is movably connected within the valve body 5, an annular slot 10 concentric with the butterfly plate 6 is opened on the inner side of the valve body 5, a sealing ring 11 is fixedly embedded within the annular slot 10, the pneumatic regulating actuator 1 is composed of a positioner and a cylinder, the positioner is electrically connected to the cylinder, and the cylinder is a rotary cylinder;

[0022] In order to facilitate the disassembly and repair of the valve stem 4 and the butterfly plate 6, the butterfly plate 6 radially penetrates through an installation hole. The butterfly plate 6 is sleeved on the outer edge of the valve stem 4 through the installation hole. Two through holes 17 that are mirror-symmetrical and communicate with the installation hole are axially opened on the outer side of the butterfly plate 6. The outer edge of the valve stem 4 mirror-penetrates through two mirror-symmetrical positioning holes 18. Two upper and lower mirror-symmetrical positioning grooves 20 are radially opened on the inner wall of the installation hole. A wedge pin 19 is movably inserted through each through hole 17. The wedge pin 19 passes through the positioning hole 18 and is inserted into the positioning groove 20. The ends of the two wedge pins 19 are jointly fixed to a fixing plate 16. A counterbore 14 that communicates with the upper through hole 17 is radially opened at the top of the butterfly plate 6. A limiting member is movably connected in the counterbore 14. A plurality of equally spaced threaded grooves are vertically opened on the end face of the valve body 5. The bottom surface of the actuator fixing bracket 2 vertically penetrates through a plurality of equally spaced connection holes. A second bolt is movably inserted through each connection hole. The end of the second bolt is threadedly connected in the threaded groove;

[0023] The limiting member includes a pull rod 15 movably inserted into the counterbore 14. One end of the pull rod 15 is fixedly connected to a pull block 13. A receiving groove 22 that is concentric with the counterbore 14 is radially opened on the inner wall of the upper positioning hole 18. A magnetic block 25 is movably connected in the receiving groove 22. The magnetic block 25 is fixedly connected to the end of the pull rod 15. A spring 23 is provided in the receiving groove 22. The spring 23 is sleeved on the outer edge of the pull rod 15. A groove 24 adapted to the magnetic block 25 is radially opened on the outer edge of the wedge pin 19. The magnetic block 25 is magnetically movably inserted into the positioning groove 20. The wedge pin 19 is made of metal;

[0024] In order to reduce friction and deviation and extend the service life of the valve, a lower shaft sleeve 8 is sleeved on the outer edge of the lower end of the valve stem 4. A tapered roller bearing 9 is provided below the lower shaft sleeve 8. The tapered roller bearing 9 is sleeved on the outside of the valve stem 4. Both the tapered roller bearing 9 and the lower shaft sleeve 8 are movably connected to the lower end of the valve body 5. An upper shaft sleeve 12 is sleeved on the outer edge of the upper end of the valve stem 4. A packing set 21 is provided at the upper end of the upper shaft sleeve 12. The packing set 21 is sleeved on the outer edge of the valve stem 4. Both the upper shaft sleeve 12 and the packing set 21 are movably connected in the valve body 5.

[0025] By providing a pneumatic regulating actuator 1 on the valve body 5 and connecting it to the valve stem 4 through a connecting shaft 3, the butterfly plate 6 can be accurately adjusted within a large range. At the same time, the structure of this device is simple and the manufacturing cost is low, replacing the imported regulating valve, thereby saving costs. At the same time, the valve body 5 has a fast response speed, high efficiency, and stability. The valve stem 4 and the butterfly plate 6 are connected through a limiting member, so as to facilitate the maintenance of the butterfly plate 6 in the valve body 5.

[0026] Working principle: When in use, the pneumatic regulating butterfly valve controls the operation of a cylinder with the model of a rotary cylinder through a positioner. The cylinder drives the valve stem 4 to rotate through the connecting shaft 3, and the valve stem 4 drives the butterfly plate 6 to rotate to achieve the adjustment of the valve opening. When it is necessary to disassemble the butterfly plate 6 and the valve stem 4, only need to pull up the pull block 13. The pull block 13 drives the pull rod 15 to rise. The pull rod 15 drives the magnetic block 25 to rise from the groove 24 into the storage groove 22. At the same time, the spring 23 is compressed. Then, the two wedge pins 19 are pulled out of the valve stem 4 through the fixing plate 16, and then the valve stem 4 and the butterfly plate 6 can be disassembled and maintained.

[0027] 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 described 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 within the protection scope of the present invention.

Claims

1. A special program-controlled pneumatic regulating butterfly valve for VPSA oxygen production, comprising a valve body (5), wherein the top surface of the valve body (5) is connected to a valve cover (7) by a first bolt, and is characterized in that: The top surface of the valve body (5) is fixed with an actuator fixing bracket (2) through a second bolt. The top surface of the actuator fixing bracket (2) is provided with a pneumatic regulating actuator (1). The output end of the pneumatic regulating actuator (1) is drivingly connected to a connecting shaft (3). The connecting shaft (3) rotates through the actuator fixing bracket (2). The end of the connecting shaft (3) is connected to a valve stem (4). The valve stem (4) rotates through the valve cover (7) and is rotatably connected within the valve body (5). The outer edge of the valve stem (4) is sleeved with a butterfly plate (6), and the butterfly plate (6) is movably connected within the valve body (5).

2. The special program-controlled pneumatic regulating butterfly valve for VPSA oxygen production according to claim 1, characterized in that: The butterfly plate (6) radially penetrates through a mounting hole. The butterfly plate (6) is sleeved on the outer edge of the valve stem (4) through the mounting hole. Two axially symmetric through holes (17) that are mirror-symmetrical and communicate with the mounting hole are axially opened on the outer side of the butterfly plate (6). The outer edge of the valve stem (4) mirror-penetrates through two mirror-symmetrical positioning holes (18). Two axially mirror-symmetrical positioning grooves (20) are radially opened on the inner wall of the mounting hole. Each through hole (17) is movably penetrated by a wedge pin (19). The wedge pin (19) passes through the positioning hole (18) and is inserted into the positioning groove (20). The ends of the two wedge pins (19) are jointly fixed to a fixing plate (16). A counterbore (14) that communicates with the upper through hole (17) is radially opened at the top of the butterfly plate (6), and a limiting member is movably connected within the counterbore (14).

3. The VPSA oxygen production dedicated programmable pneumatic regulating butterfly valve according to claim 2, characterized in that: The limiting member includes a pull rod (15) movably penetrated within the counterbore (14). One end of the pull rod (15) is fixedly connected to a pull block (13). A receiving groove (22) that is concentric with the counterbore (14) is radially opened on the inner wall of the upper positioning hole (18). A magnetic block (25) is movably connected within the receiving groove (22). The magnetic block (25) is fixedly connected to the end of the pull rod (15). A spring (23) is provided within the receiving groove (22). The spring (23) is sleeved on the outer edge of the pull rod (15). A groove (24) that is adapted to the magnetic block (25) is radially opened on the outer edge of the wedge pin (19). The magnetic block (25) is magnetically movably inserted into the positioning groove (20), and the wedge pin (19) is made of a metal material.

4. A special programmable pneumatic regulating butterfly valve for VPSA oxygen production according to claim 1, characterized in that: An annular clamping groove (10) that is concentric with the butterfly plate (6) is opened on the inner side of the valve body (5), and a sealing ring (11) is fixedly embedded within the annular clamping groove (10).

5. A special programmable pneumatic regulating butterfly valve for VPSA oxygen production according to claim 1, characterized in that: The lower outer edge of the valve stem (4) is sleeved with a lower shaft sleeve (8). A tapered roller bearing (9) is provided below the lower shaft sleeve (8). The tapered roller bearing (9) is sleeved on the outside of the valve stem (4). Both the tapered roller bearing (9) and the lower shaft sleeve (8) are movably connected to the lower end of the valve body (5).

6. The special programmable pneumatic regulating butterfly valve for VPSA oxygen production according to claim 1, characterized in that: The upper outer edge of the valve stem (4) is sleeved with an upper shaft sleeve (12), a packing set (21) is arranged at the upper end of the upper shaft sleeve (12), the packing set (21) is sleeved on the outer edge of the valve stem (4), and both the upper shaft sleeve (12) and the packing set (21) are movably connected in the valve body (5).

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