Self-compensation gas-liquid linkage executing mechanism with sealing device

Abstract

A self-compensation gas-liquid linkage actuating mechanism with a sealing device comprises a first gas-liquid tank, a second gas-liquid tank, an actuator and a bearing table, a self-compensation sealing box and an electric telescopic rod are arranged on the bearing table, a sealing sponge strip and a check block are arranged in the self-compensation sealing box, the electric telescopic rod is connected with a lifting platform, the lifting platform is connected with a suspension arm, and the suspension arm is connected with a suspension rod. The lifting rod is connected with a sealing cover, the sealing cover comprises an upper layer, a lower layer, a middle layer and an interlayer, a sealing sliding plate in the middle layer is connected with a connecting rod, the connecting rod is connected with a threaded sleeve, a threaded rod penetrates through the middle of the threaded sleeve, and the threaded rod is connected with a motor; the sealing sponge strip can guarantee the sealing effect of the self-compensation sealing box and the sealing cover, the sealing sliding plate in the sealing cover can be pulled out, stability of air pressure in the self-compensation sealing box during self-compensation operation is guaranteed, the sealing cover can be controlled by the electric telescopic rod to ascend and descend, and hydraulic oil can be conveniently added into the self-compensation sealing box.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid linkage actuators, in particular to a self-compensating gas-liquid linkage actuator with a sealing device. Background Art

[0002] The gas-liquid linkage actuator uses pipeline natural gas or nitrogen as power and hydraulic oil as the transmission medium to drive the opening and closing of pipeline valves. The basic control functions include: local pneumatic operation, manual hydraulic pump operation, automatic pipe break protection, remote electric control on / off, ESD emergency shutdown, etc. Under normal working conditions, the first gas-liquid tank and the second gas-liquid tank in the gas-liquid linkage actuator of the gas ball valve are each filled with half a tank of hydraulic oil. When the gas ball valve is opened and closed, the gas pushes the hydraulic oil and the hydraulic oil pushes the actuator, thereby realizing the opening and closing of the ball valve. However, after the gas-liquid linkage actuator of the gas transmission station has been used for a long time, the two gas-liquid tanks may have an unbalanced oil level, resulting in more oil level on one side of the first gas-liquid tank and less oil level on the other side of the second gas-liquid tank, and even affecting the normal operation of the gas-liquid linkage actuator of the ball valve. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a self-compensating gas-liquid linkage actuator with a sealing device. When the oil levels in the first gas-liquid tank and the second gas-liquid tank are unbalanced, the gas-liquid tank with a low oil level can be self-compensated for hydraulic oil to achieve oil level balance. The self-compensating hydraulic oil is stored in a self-compensating sealing box to ensure the use effect of the hydraulic oil.

[0004] The technical solution adopted by the utility model is a self-compensating gas-liquid linkage actuator with a sealing device, comprising a first gas-liquid tank, a second gas-liquid tank and an actuator, the first gas-liquid tank and the second gas-liquid tank are connected with the same three-way pipe, one end of the three-way pipe is connected to a first valve, the other end of the three-way pipe is connected to an oil pipeline through a second valve, the oil pipeline is connected to an oil pump, the oil pump is located in a self-compensating sealing box, a sealing sponge strip is provided on the inner side wall of the top of the self-compensating sealing box, a block is provided under the sealing sponge strip, a first pressure sensor is provided in the block, the self-compensating sealing box is located on a load-bearing platform, the load-bearing platform An electric telescopic rod is provided on the edge of the heavy platform, the electric telescopic rod is connected to the lifting platform, the lifting platform is provided with a boom, a boom is provided below the end of the boom, the boom is connected to a sealing cover, the sealing cover comprises an upper layer, a lower layer, a middle layer and an interlayer, a second pressure sensor is provided in the interlayer, a third pressure sensor is provided in the outlet end of the slide in the middle layer, a gear bar is provided in the slide, the gear bar is connected to a sealing slide, the other end of the sealing slide is connected to a connecting rod, the connecting rod is connected to a threaded sleeve, a threaded rod passes through the middle of the threaded sleeve, the threaded rod is connected to a motor, and the motor is connected to the boom.

[0005] A first sealing strip is arranged around the oil delivery pipe passing through the self-compensating sealing box.

[0006] The sealing slide plate is provided with a second sealing strip around the middle layer, and the width of the sealing slide plate is almost the same as the width of the slide groove.

[0007] The upper layer and the lower layer are provided with the same air holes, and the air holes correspond to the positions of the slide grooves.

[0008] An electric control box is arranged above the actuator.

[0009] A plurality of load-bearing columns are arranged below the load-bearing platform.

[0010] The four sides of the lower half of the lower layer are inwardly inclined surfaces.

[0011] The beneficial effects of the utility model are as follows: the original load-bearing platform of the gas-liquid linkage actuator is enlarged, and a self-compensating sealing box and an electric telescopic rod are added to the load-bearing platform; the self-compensating sealing box can store hydraulic oil for self-compensation in the first gas-liquid tank and the second gas-liquid tank; a sealing cover is provided above the self-compensating sealing box; a sealing sponge strip can ensure the sealing effect of the self-compensating sealing box and the sealing cover; a sealing slide plate in the sealing cover can be pulled out to ensure the stability of the air pressure in the self-compensating sealing box during self-compensation operation; the sealing cover can be controlled to rise and fall by the electric telescopic rod, so it is convenient to add hydraulic oil to the self-compensating sealing box; and the first sealing strip and the second sealing strip can ensure the sealing effect at the opening of the self-compensating sealing box and the sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall front view structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the internal structure of the self-compensating sealing box and the sealing cover of the utility model.

[0014] Figure 3 It is a schematic diagram of the sealing sponge strip and the stopper structure of the utility model.

[0015] Figure 4 It is a schematic diagram of the lower half structure of the lower layer of the utility model.

[0016] Figure 5 It is a schematic diagram of the pore structure of the utility model.

[0017] Figure 6 It is a schematic diagram of the top structure of the middle layer of the utility model.

[0018] In the figure: 1. a first gas-liquid tank; 2. a second gas-liquid tank; 3. an actuator; 4. a three-way pipe; 5. a first valve; 6. a second valve; 7. an oil pipeline; 8. an oil pump; 9. a self-compensating sealing box; 10. a sealing sponge strip; 11. a stopper; 12. a first pressure sensor; 13. a load-bearing platform; 14. an electric telescopic rod; 15. a lifting platform; 16. a boom; 17. a boom; 18. a sealing cover; 19. an upper layer; 20. a lower layer; 21. a middle layer; 22. a slide; 23. a second pressure sensor; 24. a stopper strip; 25. a sandwich layer; 26. a sealing slide plate; 27. a connecting rod; 28. a threaded sleeve; 29. ​​a threaded rod; 30. a motor; 31. a first sealing strip; 32. a second sealing strip; 33. an air hole; 34. an electric control box; 35. a load-bearing column; 36. a third pressure sensor. DETAILED DESCRIPTION

[0019] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0020] Referring to the accompanying drawings, a self-compensating gas-liquid linkage actuator with a sealing device includes a first gas-liquid tank 1, a second gas-liquid tank 2 and an actuator 3. The first gas-liquid tank 1 and the second gas-liquid tank 2 are connected with the same three-way pipe 4, one end of the three-way pipe 4 is connected to a first valve 5, and the other end of the three-way pipe 4 is connected to an oil pipeline 7 through a second valve 6. The oil pipeline 7 is connected to an oil pump 8, and the oil pump 8 is located in a self-compensating sealing box 9. A sealing sponge strip 10 is provided on the inner side wall of the top of the self-compensating sealing box 9, a stopper 11 is provided below the sealing sponge strip 10, and a first pressure sensor 12 is provided in the stopper 11. The self-compensating sealing box 9 is located on a load-bearing platform 13, and an electric telescopic rod 14 is provided on the edge of the load-bearing platform 13. The rod 14 is connected to the lifting platform 15, and the lifting platform 15 is provided with a suspension arm 16, and a suspension rod 17 is provided below the end of the suspension arm 16, and the suspension rod 17 is connected to a sealing cover 18, and the sealing cover 18 includes an upper layer 19, a lower layer 20, a middle layer 21 and an interlayer 25, and a second pressure sensor 23 is provided in the interlayer 25, and a third pressure sensor 36 is provided in the outlet end of the slide groove 22 in the middle layer 21, and a stop bar 24 is provided in the slide groove 22, and the stop bar 24 is connected to a sealing slide plate 26, and the other end of the sealing slide plate 26 is connected to a connecting rod 27, and the connecting rod 27 is connected to a threaded sleeve 28, and a threaded rod 29 passes through the middle of the threaded sleeve 28, and the threaded rod 29 is connected to a motor 30, and the motor 30 is connected to the suspension rod 17.

[0021] A first sealing strip 31 is arranged around the oil delivery pipe 7 passing through the self-compensating sealing box 9 .

[0022] The sealing slide plate 26 is provided with a second sealing strip 32 around the middle layer 21 , and the width of the sealing slide plate 26 is almost the same as the width of the slide groove 22 .

[0023] The upper layer 19 and the lower layer 20 are provided with the same air holes 33 , and the positions of the air holes 33 and the sliding grooves 22 correspond to each other.

[0024] An electric control box 34 is provided above the actuator 3 .

[0025] A plurality of load-bearing columns 35 are disposed below the load-bearing platform 13 .

[0026] The four sides of the lower half of the lower layer 20 are inwardly inclined surfaces.

[0027] When the sealing device of the self-compensating gas-liquid linkage actuator is in use, the electric telescopic rod 14 is first started to lift the sealing cover 18 to a suitable height, the hydraulic oil is poured into the self-compensating sealing box 9, and then the sealing cover 18 is dropped. When the sealing cover 18 touches the first pressure sensor 12, the first pressure sensor 12 will transmit a signal to the controller in the electric control box 34, and the controller will control the electric telescopic rod 14 to stop descending.

[0028] When the oil level in the first gas-liquid tank 1 or the second gas-liquid tank 2 becomes unbalanced, the first valve 5 is closed and the motor 30 is started. The motor 30 drives the threaded rod 29 to rotate so that the threaded sleeve 28 moves outward, and the threaded sleeve 28 drives the connecting rod 27 to move outward. The connecting rod 27 drives the sealing slide 26 to move outward. When the gear bar 24 hits the third pressure sensor 36, the controller controls the motor 30 to stop working, then opens the second valve 6, and then starts the oil pump 8 to pump the hydraulic oil in the self-compensating sealing box 9 into the corresponding first gas-liquid tank 1 or the second gas-liquid tank 2 for replenishment. At the same time, the outside air will enter the self-compensating sealing box 9 through the air hole 33 to keep the air pressure inside it stable.

[0029] When the replenishment is completed, the oil pump 8 is closed, and then the second valve 6 is closed. The motor 30 is started to drive the sealing slide plate 26 to move inward to seal the middle layer 21 in the sealing cover 18, so that the self-compensating sealing box 9 is sealed.

[0030] The original load-bearing platform 13 of the gas-liquid linkage actuator has been enlarged, and a self-compensating sealing box 9 and an electric telescopic rod 14 have been added to the load-bearing platform 13. The self-compensating sealing box 9 can store hydraulic oil for self-compensation of the first gas-liquid tank 1 and the second gas-liquid tank 2. A sealing cover 18 is provided above the self-compensating sealing box 9. The sealing sponge strip 10 can ensure the sealing effect of the self-compensating sealing box 9 and the sealing cover 18. The sealing slide plate 26 in the sealing cover 18 can be pulled out to ensure the stability of the air pressure in the self-compensating sealing box 9 during the self-compensation operation. The sealing cover 18 can be controlled to rise and fall by the electric telescopic rod 14, which is convenient for adding hydraulic oil to the self-compensating sealing box 9. The first sealing strip 31 and the second sealing strip 32 can ensure the sealing effect at the opening of the self-compensating sealing box and the sealing cover.

[0031] The above-mentioned embodiments of the new invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A self-compensating gas-liquid linkage actuator with a sealing device, comprising a first gas-liquid tank (1), a second gas-liquid tank (2) and an actuator (3), characterized in that: The first gas-liquid tank (1) and the second gas-liquid tank (2) are connected to the same three-way pipe (4), one end of the three-way pipe (4) is connected to the first valve (5), and the other end of the three-way pipe (4) is connected to the oil pipeline (7) through the second valve (6), and the oil pipeline (7) is connected to the oil pump (8), and the oil pump (8) is located in the self-compensating sealing box (9), and a sealing sponge strip (10) is provided on the inner side wall of the top of the self-compensating sealing box (9), and a stopper (11) is provided below the sealing sponge strip (10), and a first pressure sensor (12) is provided in the stopper (11), and the self-compensating sealing box (9) is located on the load-bearing platform (13), and an electric telescopic rod (14) is provided on the edge of the load-bearing platform (13), and the electric telescopic rod (14) is connected to the lifting platform (15), and the lifting platform (15) is provided with a boom ( 16), a suspension rod (17) is provided below the end of the suspension arm (16), the suspension rod (17) is connected to a sealing cover (18), the sealing cover (18) comprises an upper layer (19), a lower layer (20), a middle layer (21) and an interlayer (25), a second pressure sensor (23) is provided in the interlayer (25), a third pressure sensor (36) is provided in the outlet end of the slide groove (22) in the middle layer (21), a stop bar (24) is provided in the slide groove (22), the stop bar (24) is connected to a sealing slide plate (26), the other end of the sealing slide plate (26) is connected to a connecting rod (27), the connecting rod (27) is connected to a threaded sleeve (28), a threaded rod (29) passes through the middle of the threaded sleeve (28), the threaded rod (29) is connected to a motor (30), and the motor (30) is connected to the suspension rod (17).

2. The self-compensating gas-hydraulic actuator with a sealing device according to claim 1, characterized in that: A first sealing strip (31) is provided around the oil delivery pipe (7) passing through the self-compensating sealing box (9).

3. The self-compensating gas-hydraulic actuator with a sealing device according to claim 1, characterized in that: A second sealing strip (32) is provided around the sealing slide plate (26) passing through the middle layer (21), and the width of the sealing slide plate (26) is almost the same as the width of the slide groove (22).

4. The self-compensating gas-hydraulic actuator with a sealing device according to claim 1, characterized in that: The upper layer (19) and the lower layer (20) are provided with the same air holes (33), and the positions of the air holes (33) and the slide grooves (22) correspond to each other.

5. The self-compensating gas-hydraulic actuator with a sealing device according to claim 1, characterized in that: An electric control box (34) is provided above the actuator (3).

6. The self-compensating gas-hydraulic actuator with a sealing device according to claim 1, characterized in that: A plurality of load-bearing columns (35) are arranged below the load-bearing platform (13).

7. The self-compensating gas-hydraulic actuator with a sealing device according to claim 1, characterized in that: The four sides of the lower half of the lower layer (20) are inwardly inclined surfaces.

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