Pneumatic flange type floating ball valve

Abstract

The utility model relates to the technical field of floating ball valves, and discloses a pneumatic flange type floating ball valve which comprises a ball valve body, a support is installed on the upper surface of the ball valve body, a manual operation mechanism is installed on the upper surface of the support, a valve rod is installed on the surface of the manual operation mechanism, and the valve rod is of a back-sealed bottom-mounted structure. A pneumatic actuator is installed on the upper surface of the manual operation mechanism, and an electromagnetic valve is installed on the surface of the pneumatic actuator. The end cover O-shaped ring of the spring assembly is additionally arranged, reliable sealing of the ball valve in long-term use can be guaranteed, meanwhile, the valve rod is of a back-sealed bottom-mounted structure, and reliable sealing of the valve rod can be guaranteed; the backlash between the additionally arranged rack and the gear is small, so that maximum meshing can be realized, and accurate positioning can be realized; the top adapter and the position indicator can be conveniently installed at any 45-degree position, and workers can conveniently and rapidly install the output shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of floating ball valves, in particular to a pneumatic flange floating ball valve. Background Technique

[0002] Pneumatic ball valves are widely applicable to fluid automatic control or regulating control in industries such as natural gas, oil products, chemical industry, metallurgy, papermaking, electric power, mining, printing and dyeing, biopharmaceuticals, daily chemical industry, food and beverage, water treatment, and air treatment, and are used in conjunction with automated pneumatic instruments.

[0003] Common pneumatic flange floating ball valves generally use sealing rings to ensure their own sealing performance. However, when using ball valves under low-pressure, ultra-low-pressure, and vacuum conditions, gaps are likely to appear between the ball valve and the sealing ring, resulting in poor sealing effect of the sealing ring on the ball valve. When used under high-pressure conditions, gaps are likely to appear at the valve stem, leading to leakage at the valve stem. Moreover, factors such as the roundness error of the sphere, the guiding method, and the sealing material will cause deviation in control accuracy. At the same time, during the automatic operation of the valve, the staff needs to spend time finding the correct position to install the output shaft. When the output shaft is installed incorrectly, it takes time to reinstall the output shaft, which is inconvenient for the staff to quickly install the output shaft. Content of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a pneumatic flange floating ball valve to solve the problems mentioned in the above background technique, that is, when using a ball valve under low-pressure, ultra-low-pressure, and vacuum conditions, gaps are likely to appear between the ball valve and the sealing ring, resulting in poor sealing effect of the sealing ring on the ball valve. When used under high-pressure conditions, gaps are likely to appear at the valve stem, leading to leakage at the valve stem. Moreover, factors such as the roundness error of the sphere, the guiding method, and the sealing material will cause deviation in control accuracy. At the same time, during the automatic operation of the valve, the staff needs to spend time finding the correct position to install the output shaft. When the output shaft is installed incorrectly, it takes time to reinstall the output shaft, which is inconvenient for the staff to quickly install the output shaft.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: A pneumatic flange floating ball valve, comprising:

[0008] Ball valve, a bracket is installed on the upper surface of the ball valve, a manual operating mechanism is installed on the upper surface of the bracket, a valve stem is installed on the surface of the manual operating mechanism, the valve stem adopts a down-mounted structure with reverse sealing, a pneumatic actuator is installed on the upper surface of the manual operating mechanism, a solenoid valve is installed on the surface of the pneumatic actuator, an air source treatment triple unit is installed on the upper left side of the upper surface of the pneumatic actuator, the solenoid valve is connected to the surface of the air source treatment triple unit, and a signal switch box is installed on the upper right side of the upper surface of the pneumatic actuator;

[0009] Left end cover, arranged on the left side of the pneumatic actuator, a right end cover is installed on the right side of the pneumatic actuator, a cylinder block is installed on the left side of the right end cover, a piston is installed on the left side of the cylinder block, racks are evenly installed on the surface of the piston, an output shaft is installed on the left side of the inner cavity of the cylinder block, a gear is installed on the surface of the output shaft, and an adjusting cam is installed at the top of the output shaft;

[0010] End cover O-ring, arranged on the left side of the cylinder block, a piston O-ring is installed on the right side of the piston, a bottom O-ring is installed at the bottom of the output shaft, and a top O-ring is installed at the top of the output shaft;

[0011] The first bearing is arranged on the upper surface of the bottom O-ring, the second bearing is installed on the upper surface of the adjusting cam, the third bearing is installed at the bottom of the output shaft, the fourth bearing is installed on the right side of the piston, and the fifth bearing is installed at the top of the output shaft;

[0012] Spring assembly, arranged on the left side of the piston, a snap ring is installed on the surface of the spring assembly, a position indicator is installed on the upper surface of the cylinder block, a screw is installed in the inner cavity of the position indicator, the screw is connected to the output shaft, and a top adapter is installed on the upper surface of the position indicator.

[0013] Preferably, the first bearing, the second bearing, the third bearing, the fourth bearing, and the fifth bearing are all connected to the inner wall of the cylinder block. The fourth bearing is a guide bearing, and the fifth bearing is a thrust bearing. The second bearing, the third bearing, and the fifth bearing can improve the stability of the output shaft, and the fourth bearing and the first bearing can improve the stability of the piston.

[0014] Preferably, end cover bolts are screwed at the four corners of the surface of the left end cover, and the end cover bolts all penetrate through the surface of the left end cover and are screwed to the surface of the snap ring. The snap ring can be installed on the surface of the left end cover through the end cover bolts.

[0015] Preferably, first gaskets are installed on the left sides of the end cover bolts, and a second gasket is provided on the back of the cylinder block. The first gasket can improve the firmness of the installation of the end cover bolts on the snap ring.

[0016] Preferably, a nut is mounted on the surface of the second gasket, and an adjusting bolt is mounted on the surface of the nut. The adjusting bolt is screwed onto the surface of the cylinder block, and the internal structure of the cylinder block can be installed through the adjusting bolt.

[0017] Advantages

[0018] Compared with the prior art, the present utility model provides a pneumatic flange floating ball valve, which has the following advantages:

[0019] 1. For this pneumatic flange floating ball valve, the added piston O-ring is designed as a lip-shaped elastic sealing ring structure, which can better ensure the sealing reliability and service life. For ball valves used in low-pressure, ultra-low-pressure or vacuum working conditions, the end cover O-ring of the spring assembly can ensure the reliable sealing of the ball valve during long-term use. At the same time, the valve stem adopts a down-mounted structure with reverse sealing, and the sealing force of the reverse sealing increases with the increase of the medium pressure, so the reliable sealing of the valve stem can be ensured, and there will be no leakage at the valve stem when the valve is abnormally pressurized.

[0020] 2. For this pneumatic flange floating ball valve, the added piston, rack and first bearing can achieve the advantages of precise operation, low friction and long life. The fourth bearing of the piston can prevent the output shaft from breaking. The tooth clearance between the rack and the gear of the output shaft is small, and the maximum meshing can be achieved, so that the whole process can be efficiently operated, accurate positioning can be realized, and the control accuracy of the ball valve is improved.

[0021] 3. For this pneumatic flange floating ball valve, the combination of the top adapter and the position indicator can conveniently realize the correct position indication of the "actuator / valve". The top adapter and the position indicator can be conveniently installed at any 45° position. Therefore, during the automatic operation of the valve, there is no need to spend time obtaining the correct position indication and reinstalling the output shaft. The top adapter and the position indicator are applicable to various connection methods of the output shaft, which can facilitate the staff to quickly install the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present utility model;

[0023] Figure 2 It is a schematic installation structure diagram of the pneumatic actuator of the present utility model;

[0024] Figure 3 It is an exploded three-dimensional view of the pneumatic actuator of the present utility model;

[0025] Figure 4 It is a schematic structural diagram of the spring assembly of the present utility model;

[0026] Figure 5 It is an exploded three-dimensional view of the position indicator of the present utility model;

[0027] Figure 6 This is a schematic structural diagram of the position indicator of the present utility model in the closed state;

[0028] Figure 7 This is a schematic structural diagram of the position indicator of the present utility model in the opened state.

[0029] In the figure: 1, ball valve; 101, bracket; 102, manual operating mechanism; 1021, valve stem; 103, pneumatic actuator; 104, solenoid valve; 105, air source treatment triple unit; 106, signal switch box; 2, left end cover; 3, right end cover; 4, cylinder block; 5, piston; 51, rack; 6, output shaft; 61, gear; 7, adjusting cam; 8, end cover O-ring; 9, piston O-ring; 10, bottom O-ring; 11, top O-ring; 12, first bearing; 13, second bearing; 14, third bearing; 15, fourth bearing; 16, fifth bearing; 17, spring assembly; 18, snap ring; 19, end cover bolt; 20, first gasket; 21, second gasket; 22, nut; 23, adjusting bolt; 24, position indicator; 241, top adapter; 25, screw. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 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 shall fall within the protection scope of the present utility model.

[0031] The present utility model provides a technical solution, a pneumatic flange floating ball valve. Please refer to Figure 1 , which includes a ball valve 1. A bracket 101 is installed on the upper surface of the ball valve 1. A manual operating mechanism 102 is installed on the upper surface of the bracket 101. A valve stem 1021 is installed on the surface of the manual operating mechanism 102. The valve stem 1021 adopts an inverted seal down-mounted structure. A pneumatic actuator 103 is installed on the upper surface of the manual operating mechanism 102. A solenoid valve 104 is installed on the surface of the pneumatic actuator 103. An air source treatment triple unit 105 is installed on the upper left side of the upper surface of the pneumatic actuator 103. The solenoid valve 104 is connected to the surface of the air source treatment triple unit 105. A signal switch box 106 is installed on the upper right side of the upper surface of the pneumatic actuator 103;

[0032] Please refer to Figure 2, the left end cover 2 is arranged on the left side of the pneumatic actuator 103. The right end cover 3 is installed on the right side of the pneumatic actuator 103. The cylinder block 4 is installed on the left side of the right end cover 3. The piston 5 is installed on the left side of the cylinder block 4. The rack 51 is evenly installed on the surface of the piston 5. The output shaft 6 is installed on the left side of the inner cavity of the cylinder block 4. The gear 61 is installed on the surface of the output shaft 6. The adjusting cam 7 is installed at the top of the output shaft 6. The structure of the rack 51 and the gear 61 makes it have a compact structure, symmetrical installation, long service life and fast action. It can be reversed simply by flipping the piston 5 on site. The anodic hardening of the piston 5 makes it more corrosion-resistant and durable;

[0033] The end cover O-ring 8 is arranged on the left side of the cylinder block 4. The piston O-ring 9 is installed on the right side of the piston 5. The bottom O-ring 10 is installed at the bottom of the output shaft 6. The top O-ring 11 is installed at the top of the output shaft 6;

[0034] The first bearing 12 is arranged on the upper surface of the bottom O-ring 10. The second bearing 13 is installed on the upper surface of the adjusting cam 7. The third bearing 14 is installed at the bottom of the output shaft 6. The fourth bearing 15 is installed on the right side of the piston 5. The fifth bearing 16 is installed at the top of the output shaft 6;

[0035] The spring assembly 17 is arranged on the left side of the piston 5. The snap ring 18 is installed on the surface of the spring assembly 17. The position indicator 24 is installed on the upper surface of the cylinder block 4. Please refer to Figure 5 , the position indicator 24 is installed on the upper surface of the cylinder block 4. The screw 25 is installed in the inner cavity of the position indicator 24. The screw 25 is connected to the output shaft 6. The top adapter 241 is installed on the upper surface of the position indicator 24;

[0036] The adopted piston O-ring 9 is designed with a lip-shaped elastic sealing ring structure, which can better ensure the sealing reliability and service life. For the ball valve 1 used in low-pressure, ultra-low-pressure or vacuum working conditions, the end cover O-ring 8 with the spring assembly 17 can ensure the reliable sealing of the ball valve 1 during long-term use. At the same time, the valve stem 1021 adopts a down-mounted structure with reverse sealing. The sealing force of the reverse sealing increases with the increase of the medium pressure, so it can ensure the reliable sealing of the valve stem 1021. When the valve abnormally pressurizes, there will be no leakage at the valve stem 1021;

[0037] The piston 5 and the rack 51 have the advantages of precise operation, low friction and long life with the first bearing 12. The fourth bearing 15 of the piston 5 can prevent the output shaft 6 from breaking. The backlash between the rack 51 and the gear 61 of the output shaft 6 is small, and they can be meshed with the maximum meshing, so as to achieve efficient operation throughout the process, realize precise positioning, and improve the control accuracy of the ball valve 1;

[0038] The top adapter 241 and the position indicator 24 combined can conveniently achieve the correct position indication of the "actuator / valve". The top adapter 241 and the position indicator 24 can be conveniently installed at any 45° position. Therefore, during the automatic operation of the valve, there is no need to spend time obtaining the correct position indication and reinstalling the output shaft 6. The top adapter 241 and the position indicator 24 are applicable to various connection methods of the output shaft 6, which can facilitate the staff to quickly install the output shaft 6.

[0039] The first bearing 12, the second bearing 13, the third bearing 14, the fourth bearing 15, and the fifth bearing 16 are all connected to the inner wall of the cylinder block 4. The fourth bearing 15 is a guide bearing, and the fifth bearing 16 is a thrust bearing. The second bearing 13, the third bearing 14, and the fifth bearing 16 can improve the stability of the output shaft 6, and the fourth bearing 15 and the first bearing 12 can improve the stability of the piston 5. The first bearing 12 is made of fluorocarbon composite material, and the second bearing 13, the third bearing 14, the fourth bearing 15, and the fifth bearing 16 are all made of nylon 46 material.

[0040] Please refer to Figure 4 , end cap bolts 19 are screwed on the four corners of the surface of the left end cap 2. The end cap bolts 19 all penetrate the surface of the left end cap 2 and are screwed on the surface of the snap ring 18. The snap ring 18 can be installed on the surface of the left end cap 2 through the end cap bolts 19.

[0041] First gaskets 20 are installed on the left sides of the end cap bolts 19, and a second gasket 21 is provided on the back of the cylinder block 4. The first gaskets 20 can improve the firmness of the installation of the end cap bolts 19 on the snap ring 18.

[0042] Please refer to Figure 3 , a nut 22 is installed on the surface of the second gasket 21, and an adjusting bolt 23 is installed on the surface of the nut 22. The adjusting bolt 23 is screwed on the surface of the cylinder block 4. The internal structure of the cylinder block 4 can be installed through the adjusting bolt 23.

[0043] The piston O-ring 9 first adopted by this device is designed with a lip-shaped elastic sealing ring structure, which can better ensure the reliability and service life of the seal. For the ball valve 1 used in low-pressure, ultra-low-pressure or vacuum working conditions, the end cover O-ring 8 of the spring assembly 17 can ensure the reliable seal of the ball valve 1 during long-term use. At the same time, the valve stem 1021 adopts a down-mounted structure with reverse sealing. The sealing force of the reverse seal increases with the increase of the medium pressure, so it can ensure the reliable seal of the valve stem 1021. When the valve abnormally boosts pressure, there will be no leakage at the valve stem 1021. Then, the piston 5 and the rack 51 can achieve the advantages of precise operation, low friction and long life with the first bearing 12. The fourth bearing 15 of the piston 5 can prevent the output shaft 6 from breaking. The backlash between the rack 51 and the gear 61 of the output shaft 6 is small, and they can be meshed with the maximum engagement, so as to achieve efficient operation throughout the process, realize precise positioning, and improve the control accuracy of the ball valve 1. Finally, the top adapter 241 and the position indicator 24 combined together can conveniently achieve the correct position indication of the "actuator / valve". The top adapter 241 and the position indicator 24 can be conveniently installed at any 45° position. Therefore, during the automatic operation of the valve, there is no need to spend time obtaining the correct position indication and reinstalling the output shaft 6. The top adapter 241 and the position indicator 24 are applicable to various connection methods of the output shaft 6, which can facilitate the staff to quickly install the output shaft 6. Please refer to Figure 6 , which is the indication when the position indicator 24 is in the closed state. Please refer to Figure 7 , which is the indication when the position indicator 24 is in the open state.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic flange floating ball valve, characterized in that: include: A ball valve (1), wherein a bracket (101) is mounted on the upper surface of the ball valve (1), a manual operating mechanism (102) is mounted on the upper surface of the bracket (101), a valve stem (1021) is mounted on the surface of the manual operating mechanism (102), the valve stem (1021) adopts a bottom-mounted structure with an inverted seal, a pneumatic actuator (103) is mounted on the upper surface of the manual operating mechanism (102), a solenoid valve (104) is mounted on the surface of the pneumatic actuator (103), an air source processing triplet (105) is mounted on the left side of the upper surface of the pneumatic actuator (103), the solenoid valve (104) is connected to the surface of the air source processing triplet (105), and a signal switch box (106) is mounted on the right side of the upper surface of the pneumatic actuator (103); A left end cover (2) is arranged on the left side of the pneumatic actuator (103); a right end cover (3) is installed on the right side of the pneumatic actuator (103); a cylinder body (4) is installed on the left side of the right end cover (3); a piston (5) is installed on the left side of the cylinder body (4); a rack (51) is evenly installed on the surface of the piston (5); an output shaft (6) is installed on the left side of the inner cavity of the cylinder body (4); a gear (61) is installed on the surface of the output shaft (6); and an adjusting cam (7) is installed on the top end of the output shaft (6); An end cover O-ring (8) is arranged on the left side of the cylinder body (4), a piston O-ring (9) is installed on the right side of the piston (5), a bottom O-ring (10) is installed at the bottom of the output shaft (6), and a top O-ring (11) is installed at the top of the output shaft (6); A first bearing (12) is arranged on the upper surface of the bottom O-ring (10), a second bearing (13) is installed on the upper surface of the adjusting cam (7), a third bearing (14) is installed on the bottom of the output shaft (6), a fourth bearing (15) is installed on the right side of the piston (5), and a fifth bearing (16) is installed on the top of the output shaft (6); A spring assembly (17) is arranged on the left side of the piston (5), an elastic retaining ring (18) is installed on the surface of the spring assembly (17), a position indicator (24) is installed on the upper surface of the cylinder body (4), a screw (25) is installed in the inner cavity of the position indicator (24), the screw (25) is connected to the output shaft (6), and a top adapter (241) is installed on the upper surface of the position indicator (24).

2. The pneumatic flange floating ball valve according to claim 1, characterized in that: The first bearing (12), the second bearing (13), the third bearing (14), the fourth bearing (15), and the fifth bearing (16) are all connected to the inner wall of the cylinder body (4); the fourth bearing (15) is a guide bearing, and the fifth bearing (16) is a thrust bearing.

3. The pneumatic flange floating ball valve according to claim 1, characterized in that: End cover bolts (19) are screwed on the four corners of the surface of the left end cover (2), and the end cover bolts (19) penetrate the surface of the left end cover (2) and are screwed on the surface of the elastic retaining ring (18).

4. The pneumatic flange floating ball valve according to claim 3 is characterized in that: A first gasket (20) is installed on the left side of the end cover bolt (19), and a second gasket (21) is provided on the back side of the cylinder body (4).

5. The pneumatic flange type floating ball valve according to claim 4, characterized in that: A nut (22) is installed on the surface of the second gasket (21), an adjusting bolt (23) is installed on the surface of the nut (22), and the adjusting bolt (23) is screwed to the surface of the cylinder body (4).

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