A rotary table based on a workover rig under pressure

Abstract

This application relates to a rotary table based on a pressure-operated work machine, belonging to the technical field of pressure-operated work machines. It includes a rotary table body. A lubrication chamber is provided inside the rotary table body, and hydraulic oil is used to be injected into the lubrication chamber. Inside the rotary table body and located in the lubrication chamber, there is a central gear and a driving gear. The central gear is used to sleeve a pipe string. The driving gear is located outside the central gear and meshes with the central gear. A hydraulic motor is provided on the rotary table body for driving the driving gear to rotate. There are multiple driving gears, which are evenly arranged along the circumferential direction of the central gear. A filtering device is provided in the lubrication chamber, and the filtering device is used to adsorb impurities in the hydraulic oil. This application has the advantage of ensuring the transmission efficiency of the gear pair.

Description

Technical Field

[0001] This application relates to the technical field of pressure - operating machines, and particularly to a rotary table based on a pressure - operating machine. Background Art

[0002] Currently, the scope of pressure - operating operations has covered: underbalanced drilling, slim - hole drilling, sidetracking, pressure - operated tubing running and pulling, pressure - operated casing running and pulling, pressure - operated liner running and pulling, pressure - operated cement plug drilling, pressure - operated bridge plug drilling, pressure - operated sand plug drilling, acidizing, fracturing, fishing, milling, cement squeezing or abandoned well operations, etc.

[0003] The process of the rotary operation of the existing pressure - operating machine is as follows: First, the moving slip group is closed to clamp the pipe string, the fixed slip group is opened, then the hydraulic pipeline on the moving slip group is removed. Then, the lifting hydraulic cylinder and the rotary table act simultaneously to drive the moving slip group and the pipe string to move and rotate upward or downward. After the pipe string moves upward or downward in place, the hydraulic pipeline on the moving slip is restored. Then, the fixed slip group is closed to clamp the pipe string. Finally, the moving slip group is opened, and the lifting hydraulic cylinder drives the moving slip group to move downward or upward to return to the original position. Repeat the above steps until the rotary operation ends.

[0004] However, when the rotary table drives the pipe string, the hydraulic motor is started, and the hydraulic motor drives the gear pair to rotate. The rotation of the gear pair drives the pipe string to rotate. The high - speed rotation of the gear pair will cause the temperature to rise, thus affecting the transmission efficiency. Summary of the Invention

[0005] To ensure the transmission efficiency of the gear pair, this application provides a rotary table based on a pressure - operating machine.

[0006] The rotary table based on a pressure - operating machine provided by this application adopts the following technical solutions:

[0007] A rotary table based on a pressure - operating machine includes a rotary - table body. A lubrication cavity is formed inside the rotary - table body, and hydraulic oil is used to be injected into the lubrication cavity. Inside the rotary - table body and within the lubrication cavity, a central gear and a driving gear are arranged. The central gear is used to sleeved with the pipe string, the driving gear is located outside the central gear and meshes with the central gear. A hydraulic motor for driving the driving gear to rotate is arranged on the rotary - table body. There are multiple driving gears which are evenly arranged circumferentially along the central gear. A filtering device is arranged in the lubrication cavity, and the filtering device is used to adsorb impurities in the hydraulic oil.

[0008] Optionally, the filtering device includes a rectangular frame disposed in the lubrication chamber and a first magnet disposed within the rectangular frame. The first magnet is cylindrical and rotatably disposed within the rectangular frame. The first magnet is used to adsorb metal debris in the hydraulic oil. The filtering device further includes a thin film wound around the first magnet, and the metal debris adsorbed by the first magnet adheres to the thin film. The filtering device further includes a winding member for winding the thin film to wrap the metal debris within the thin film.

[0009] Optionally, the winding member includes a winding shaft rotatably disposed within the rectangular frame. The winding shaft is located between adjacent first magnets. The length direction and the rotation axis of the winding shaft are both parallel to the length direction of the first magnet. A pulling member is disposed on the winding shaft, and the pulling member acts on the end of the thin film to wind the thin film onto the winding shaft.

[0010] Optionally, a tearing notch is provided on the thin film. The length direction of the tearing notch is perpendicular to the length direction of the thin film. The tearing notch is used to break the thin film when the winding shaft winds the thin film. The pulling member includes a second magnet disposed on the thin film. The second magnet is strip-shaped and is located on one side of the tearing notch. An electromagnet is disposed on the winding shaft, and the second magnet is adsorbed on the first magnet. After the electromagnet is energized, it adsorbs the second magnet and fixes it on the winding shaft.

[0011] Optionally, a first motor is provided on the rectangular frame and the output shaft enters the rectangular frame. The winding shaft is disposed on the output shaft of the first motor. The first motor drives the winding shaft to rotate to wind the thin film. When the thin film is wound, the outer side of the thin film is wound onto the winding shaft.

[0012] Optionally, a notch is formed on the turntable body, and the notch communicates with the lubrication chamber. The notch is located above the turntable body. After the rectangular frame is inserted into the lubrication chamber through the notch, the upper end surface of the rectangular frame is clamped in the notch to close the notch. A positioning groove is formed on the bottom wall of the lubrication chamber, and the bottom wall of the rectangular frame is clamped in the positioning groove.

[0013] Optionally, a receiving platform protrudes outwardly from the lower side of the inner wall of the notch. The peripheral wall of the upper end surface of the rectangular frame is stepped and abuts against the receiving platform. A sealing ring is provided on the peripheral wall of the upper end surface of the rectangular frame, and the sealing ring is clamped and deformed between the inner wall of the notch and the upper end surface of the rectangular frame.

[0014] Optionally, liquid guide covers are provided on both sides of the rectangular frame. The outer walls of the liquid guide covers are fixedly arranged on the inner wall of the lubricating cavity. The liquid guide cover includes a rectangular cover and a rectangular pipe arranged on the rectangular cover. The rectangular pipe is communicated with the rectangular cover. A plurality of rectangular pipes are provided, and the rectangular pipes are located between adjacent first magnets. The hydraulic oil enters the rectangular cover and flows through the rectangular pipes to the space between the first magnets, and then flows through the space between the first magnets to the rectangular pipes on the other side.

[0015] Optionally, a compaction roller is arranged in the rectangular frame. The compaction roller is located on one side of the take-up reel. The length direction and the rotation axis of the compaction roller are both parallel to the length direction of the take-up reel. The compaction roller is slidably arranged on the rectangular frame. A driving member is arranged on the rectangular frame for driving the compaction roller to press against the take-up reel so as to compact the film on the take-up reel.

[0016] Optionally, an air bag is sleeved on the circumferential wall of the compaction roller, and the air bag is in an inflated state to compact the film onto the take-up reel.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] Inject the hydraulic oil into the lubricating cavity. The central gear and the driving gear are immersed in the hydraulic oil. Start the hydraulic motor. The hydraulic motor drives the driving gear to rotate. The rotation of the driving gear drives the central gear to rotate. The rotation of the central gear drives the pipe string to rotate. Under the action of the hydraulic oil, the central gear and the driving gear are cooled, reducing the possibility of high-temperature failure of the central gear and the driving gear, and at the same time reducing the possibility of damage to the central gear and the driving gear, thus ensuring the transmission efficiency of the gear pair.

[0019] When the central gear and the driving gear operate for a long time, the debris on the gears falls into the hydraulic oil. At this time, under the action of the filtering device, the debris in the hydraulic oil is adsorbed, reducing the possibility of the debris damaging the gear pair and the pipe string, and ensuring the transmission efficiency of the gear pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of a rotary table based on a workover rig according to an embodiment of the present application;

[0021] Figure 2 is a sectional view of a rotary table based on a workover rig according to an embodiment of the present application;

[0022] Figure 3 is a top view of a rotary table based on a workover rig according to an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of the internal structure of a rotary table based on a workover rig according to an embodiment of the present application;

[0024] Figure 5 It is a schematic installation diagram of a rectangular frame and a turntable body in a turntable based on a pressure - operated work machine according to an embodiment of the present application;

[0025] Figure 6 It is a schematic layout diagram of a filtering device in a turntable based on a pressure - operated work machine according to an embodiment of the present application;

[0026] Figure 7 It is a schematic diagram of a liquid - guiding cover and a filtering device in a turntable based on a pressure - operated work machine according to an embodiment of the present application;

[0027] Figure 8 It is a schematic structural diagram of a filtering device in a turntable based on a pressure - operated work machine according to an embodiment of the present application;

[0028] Figure 9 It is a cross - sectional view of a rectangular frame in a turntable based on a pressure - operated work machine according to an embodiment of the present application;

[0029] Figure 10 It is a schematic structural diagram of a first magnet and a winding shaft in a turntable based on a pressure - operated work machine according to an embodiment of the present application.

[0030] Explanation of reference numerals: 1, turntable body; 2, lubricating cavity; 3, central gear; 4, driving gear; 5, hydraulic motor;

[0031] 6, filtering device; 61, rectangular frame; 62, first magnet; 63, film; 64, winding shaft; 65, second magnet; 66, electromagnet;

[0032] 7, tearing notch; 8, first motor; 9, compaction roller; 10, lead screw; 11, waterproof motor; 12, notch;

[0033] 13, liquid - guiding cover; 131, rectangular cover; 132, rectangular pipe. Detailed implementation manners

[0034] The following is a further detailed description of the present application in conjunction with the attached Figure 1 - attached Figure 10 figures.

[0035] An embodiment of the present application discloses a turntable based on a pressure - operated work machine. Referring to Figure 1 and Figure 2 , the turntable based on a pressure - operated work machine includes a turntable body 1, a lubricating cavity 2 is formed in the turntable body 1, and hydraulic oil is used to be injected into the lubricating cavity 2;

[0036] Combined with Figure 3 and Figure 4, inside the turntable body 1 and within the lubrication chamber 2, a central gear 3 and a driving gear 4 are provided. The central gear 3 is used to sleeve the pipe string. The driving gear 4 is located around the central gear 3 and meshes with the central gear 3. A hydraulic motor 5 for driving the driving gear 4 to rotate is provided on the turntable body 1. There are multiple driving gears 4 and they are evenly arranged circumferentially around the central gear 3. The central gear 3 and the driving gears 4 are immersed in the hydraulic oil. When the hydraulic motor 5 is started, the hydraulic motor 5 drives the driving gear 4 to rotate. The rotation of the driving gear 4 drives the central gear 3 to rotate, and the rotation of the central gear 3 drives the pipe string to rotate. Under the action of the hydraulic oil, the central gear 3 and the driving gears 4 are cooled, reducing the possibility of high-temperature failure of the central gear 3 and the driving gears 4, and at the same time reducing the possibility of damage to the central gear 3 and the driving gears 4, thus ensuring the transmission efficiency of the gear pair.

[0037] Combined with Figure 3 and Figure 4 , in the embodiment of the present application, four hydraulic motors 5 are provided. The four hydraulic motors 5 are evenly arranged. The four hydraulic motors 5 provide a large torque for the pipe string, facilitating the driving of the pipe string to rotate.

[0038] Referring to Figure 5 and Figure 6 , in the embodiment of the present application, a filtering device 6 is provided in the lubrication chamber 2. The filtering device 6 is used to adsorb impurities in the hydraulic oil. Under the action of the filtering device 6, the debris in the hydraulic oil is adsorbed, reducing the possibility of the debris damaging the gear pair and the pipe string, and ensuring the transmission efficiency of the gear pair.

[0039] Referring to Figures 7 - 10 , in the embodiment of the present application, the filtering device 6 includes a rectangular frame 61 provided in the lubrication chamber 2 and a first magnet 62 provided in the rectangular frame 61. There are multiple first magnets 62 and they are evenly arranged in the rectangular frame 61. The first magnets 62 are spaced apart. The first magnets 62 are cylindrical and rotatably arranged in the rectangular frame 61. The first magnets 62 are used to adsorb metal debris in the hydraulic oil. When dealing with the metal debris, the hydraulic motor 5 is started. The hydraulic motor 5 drives the driving gear 4 and the central gear 3 to rotate. The rotation of the central gear 3 drives the hydraulic oil to flow in the lubrication chamber 2. The hydraulic oil passes through the gaps between the first magnets 62. The metal debris in the hydraulic oil is adsorbed on the first magnets 62 during the flowing process, reducing the metal debris carried in the hydraulic oil and reducing the possibility of damage to the driving gear 4 and the central gear 3. And the first magnets 62 are rotatably arranged in the rectangular frame 61, facilitating the first magnets 62 to change the direction facing the hydraulic oil, and facilitating the metal debris to be adsorbed on the other parts of the first magnets 62, thus improving the adsorption effect of the first magnets 62 on the metal debris.

[0040] Referring to Figures 7 - 10, Further, the filtering device 6 further includes a thin film 63 wound around the first magnet 62, and the metal debris adsorbed by the first magnet 62 adheres to the thin film 63; when the first magnet 62 adsorbs the metal debris, the metal debris is adsorbed on the thin film 63 due to the magnetic field. Under the action of the thin film 63, the metal debris is relatively separated from the first magnet 62, facilitating the later removal of the metal debris on the first magnet 62.

[0041] Refer to Figures 7 - 10 , The filtering device 6 further includes a winding member for winding the thin film 63 to wrap the metal debris in the thin film 63; when there is a large amount of metal debris adsorbed on the thin film 63, the metal debris hinders the magnetic field generated by the first magnet 62, resulting in the metal debris being likely to fall into the hydraulic oil. Therefore, when there is a large amount of metal debris on the thin film 63, the metal debris is included in the thin film 63 by the winding member, reducing the possibility of the metal debris falling into the hydraulic oil again.

[0042] Refer to Figures 7 - 10 , In the embodiment of the present application, the winding member includes a winding shaft 64 rotatably arranged in the rectangular frame 61. The winding shaft 64 is located between adjacent first magnets 62. The length direction and the rotation axis of the winding shaft 64 are both parallel to the length direction of the first magnet 62. A pulling member is arranged on the winding shaft 64, and the pulling member acts on the end of the thin film 63 to wind the thin film 63 around the winding shaft 64; when the thin film 63 wraps the metal debris, first, the pulling member acts on the end of the thin film 63 to fix the end of the thin film 63 on the winding shaft 64. Subsequently, the winding shaft 64 rotates, and the winding shaft 64 rotates to wind the thin film 63. The thin film 63 on the side with the metal debris is wound inside, wrapping the metal debris in the thin film 63, and the operation is simple and convenient.

[0043] Refer to Figures 7 - 10 , To facilitate the winding of the thin film 63 around the winding shaft 64, a tearing notch 7 is provided on the thin film 63. The length direction of the tearing notch 7 is perpendicular to the length direction of the thin film 63. The tearing notch 7 is used to break the thin film 63 when the winding shaft 64 winds the thin film 63; under the action of the tearing notch 7, it is convenient for the winding shaft 64 to tear the thin film 63 when winding the thin film 63, facilitating the exposure of the thin film 63 without adhering metal debris to adsorb the metal debris.

[0044] Refer to Figures 7 - 10, in the embodiment of the present application, the pulling member includes a second magnet 65 provided on the film 63. The second magnet 65 is strip-shaped and is located on one side of the tearing notch 7. An electromagnet 66 is provided on the winding shaft 64. The second magnet 65 is adsorbed on the first magnet 62. After the electromagnet 66 is energized, it adsorbs the second magnet 65 and is fixed on the winding shaft 64. When the film 63 is wound, first, the electromagnet 66 is energized. The energized electromagnet 66 adsorbs the second magnet 65, and the second magnet 65 is adsorbed on the electromagnet 66, and the end of the film 63 is fixed on the winding shaft 64. The operation is simple and convenient.

[0045] Refer to Figures 7 - 10 , in the embodiment of the present application, a first motor 8 is provided on the rectangular frame 61 and the output shaft enters the rectangular frame 61. The winding shaft 64 is provided on the output shaft of the first motor 8. The first motor 8 drives the winding shaft 64 to rotate to wind the film 63. When the film 63 is wound, the outer side of the film 63 is wound on the winding shaft 64. The rotation direction of the winding shaft 64 driven by the first motor 8 is opposite to the rotation direction of the first magnet 62.

[0046] Refer to Figure 8 and Figure 9 , in the embodiment of the present application, to facilitate fixing the end of the torn film 63 on the winding shaft 64, a compaction roller 9 is provided in the rectangular frame 61. The compaction roller 9 is located on one side of the winding shaft 64. The length direction and the rotation axis of the compaction roller 9 are both parallel to the length direction of the winding shaft 64. The compaction roller 9 is slidably provided on the rectangular frame 61. The sliding direction of the compaction roller 9 is perpendicular to the rectangular frame 61. A driving member for driving the compaction roller 9 to press against the winding shaft 64 so that the film 63 is compacted on the winding shaft 64 is provided on the rectangular frame 61. The driving member includes a lead screw 10 rotatably provided in the rectangular frame 61. The mounting seats at both ends of the compaction roller 9 are threadedly connected to the lead screw 10, and a waterproof motor 11 for driving the lead screw 10 to rotate is provided on the rectangular frame 61. After the winding shaft 64 winds the film 63, the end of the film 63 flutters in the hydraulic oil. Then, the waterproof motor 11 is started. The waterproof motor 11 drives the lead screw 10 to rotate. The rotation of the lead screw 10 drives the compaction roller 9 to move towards the winding shaft 64, so that the compaction roller 9 presses against the winding shaft 64. Then, after the first motor 8 is started, the first motor 8 drives the winding shaft 64 to rotate. The rotation of the winding shaft 64 drives the end of the film 63 to pass through the compaction roller 9, and further compacts the end of the film 63 on the winding shaft 64. The operation is simple and convenient.

[0047] Refer to Figure 8 and Figure 9 , to reduce the possibility of the compaction roller 9 damaging the film 63, an airbag is sleeved on the peripheral wall of the compaction roller 9. The airbag is in an inflated state and compacts the film 63 onto the winding shaft 64. Under the action of the airbag, on the one hand, the compaction effect of the film 63 is improved, and on the other hand, the possibility of damaging the film 63 is reduced.

[0048] Refer to Figure 5 and Figure 8 To facilitate the removal of metal debris inside the film 63 package, a notch 12 is formed on the turntable body 1. The notch 12 communicates with the lubrication chamber 2. The notch 12 is located above the turntable body 1. After the rectangular frame 61 is inserted into the lubrication chamber 2 through the notch 12, the upper end surface of the rectangular frame 61 is clamped in the notch 12 to close the notch 12. A positioning groove is formed on the bottom wall of the lubrication chamber 2, and the bottom wall of the rectangular frame 61 is clamped in the positioning groove. When removing the metal debris, the rectangular frame 61 is removed from the notch 12, and then the film 63 is removed from the take-up reel 64. The operation is simple and convenient. When installing the rectangular frame 61, the rectangular frame 61 is inserted into the lubrication chamber 2 through the notch 12, and the bottom of the rectangular frame 61 is inserted into the positioning groove to fix the rectangular frame 61 in the lubrication chamber 2.

[0049] Refer to Figure 5 and Figure 8 To improve the sealing performance between the rectangular frame 61 and the notch 12, a receiving platform protrudes outward on the lower side of the inner wall of the notch 12. The peripheral wall of the upper end surface of the rectangular frame 61 is stepped and rests on the receiving platform. A sealing ring is provided on the peripheral wall of the upper end surface of the rectangular frame 61, and the sealing ring is clamped and deformed between the inner wall of the notch 12 and the upper end surface of the rectangular frame 61. Under the action of the sealing ring, the possibility of hydraulic oil leaking through the notch 12 is reduced.

[0050] Refer to Figure 6 and Figure 7 To reduce the obstructive effect of the first magnet 62 and the take-up reel 64 on the flow of hydraulic oil, in the embodiment of the present application, liquid guiding covers 13 are provided on both sides of the rectangular frame 61. The outer wall of the liquid guiding cover 13 is fixedly arranged on the inner wall of the lubrication chamber 2. The liquid guiding cover 13 includes a rectangular cover 131 and a rectangular pipe 132 arranged on the rectangular cover 131. The rectangular pipe 132 communicates with the rectangular cover 131. A plurality of rectangular pipes 132 are provided, and the rectangular pipes 132 are located between adjacent first magnets 62. Hydraulic oil enters the rectangular cover 131 and flows through the rectangular pipes 132 to between the first magnets 62 and then flows to the rectangular pipes 132 on the other side through between the first magnets 62. When the hydraulic oil flows driven by the central gear 3 and the driving gear 4, the hydraulic oil enters the rectangular cover 131 and then exits through the rectangular pipes 132. The hydraulic oil flowing out of the rectangular pipes 132 enters between the first magnets 62, reducing the obstruction of the first magnet 62 to the hydraulic oil and facilitating the flow of the hydraulic oil.

[0051] The implementation principle of the turntable of a pressure operation machine in the embodiment of the present application is as follows:

[0052] Inject hydraulic oil into the lubrication chamber 2. The central gear 3 and the driving gear 4 are immersed in the hydraulic oil. Start the hydraulic motor 5. The hydraulic motor 5 drives the driving gear 4 to rotate. The rotation of the driving gear 4 drives the central gear 3 to rotate. The rotation of the central gear 3 drives the pipe string to rotate. Under the action of the hydraulic oil, the central gear 3 and the driving gear 4 are cooled, reducing the possibility of high-temperature failure of the central gear 3 and the driving gear 4. At the same time, the possibility of damage to the central gear 3 and the driving gear 4 is reduced, thus ensuring the transmission efficiency of the gear pair;

[0053] When dealing with metal debris, start the hydraulic motor 5. The hydraulic motor 5 drives the driving gear 4 and the central gear 3 to rotate. The rotation of the central gear 3 drives the hydraulic oil to flow in the lubrication chamber 2. The hydraulic oil passes through the gap between the first magnets 62. The metal debris in the hydraulic oil is adsorbed on the first magnets 62 during the flow process, reducing the metal debris carried in the hydraulic oil and reducing the possibility of damage to the driving gear 4 and the central gear 3.

[0054] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotary table based on a pressure - operated work machine, characterized in that: It includes a turntable body (1). A lubrication chamber (2) is formed inside the turntable body (1). Hydraulic oil is used to be injected into the lubrication chamber (2). A central gear (3) and a driving gear (4) are arranged inside the turntable body (1) and within the lubrication chamber (2). The central gear (3) is used to sleeve a pipe string. The driving gear (4) is located around the central gear (3) and meshes with the central gear (3). A hydraulic motor (5) for driving the driving gear (4) to rotate is arranged on the turntable body (1). A plurality of driving gears (4) are provided and are evenly arranged circumferentially along the central gear (3). A filtering device (6) is arranged in the lubrication chamber (2). The filtering device (6) is used to adsorb impurities in the hydraulic oil. The filtering device (6) includes a rectangular frame (61) arranged in the lubrication chamber (2) and a first magnet (62) arranged inside the rectangular frame (61). The first magnet (62) is cylindrical and is rotatably arranged inside the rectangular frame (61). The first magnet (62) is used to adsorb metal debris in the hydraulic oil. The filtering device (6) further includes a thin film (63) wound around the first magnet (62). The metal debris adsorbed by the first magnet (62) adheres to the thin film (63). The filtering device (6) further includes a winding member for winding the thin film (63) to wrap the metal debris inside the thin film (63). The winding member includes a winding shaft (64) rotatably arranged inside the rectangular frame (61). The winding shaft (64) is located between adjacent first magnets (62). The length direction and the rotation axis of the winding shaft (64) are both parallel to the length direction of the first magnet (62). A pulling member is arranged on the winding shaft (64). The pulling member acts on the end of the thin film (63) to wind the thin film (63) around the winding shaft (64). A tearing notch (7) is arranged on the thin film (63). The length direction of the tearing notch (7) is perpendicular to the length direction of the thin film (63). The tearing notch (7) is used to break the thin film (63) when the winding shaft (64) winds the thin film (63). The pulling member includes a second magnet (65) arranged on the thin film (63). The second magnet (65) is strip-shaped. The second magnet (65) is located on one side of the tearing notch (7). An electromagnet (66) is arranged on the winding shaft (64). The second magnet (65) is adsorbed on the first magnet (62). After the electromagnet (66) is powered on, it adsorbs the second magnet (65) and fixes it on the winding shaft (64).

2. The turntable based on the pressure - operated work machine according to claim 1, wherein: A first motor (8) is arranged on the rectangular frame (61) and its output shaft enters the rectangular frame (61). The winding shaft (64) is arranged on the output shaft of the first motor (8). The first motor (8) drives the winding shaft (64) to rotate to wind the thin film (63). When the thin film (63) is wound, the outer side of the thin film (63) is wound around the winding shaft (64).

3. The rotary table based on the pressure - operated work machine according to claim 2, characterized in that: A notch (12) is formed on the turntable body (1), and the notch (12) communicates with the lubrication cavity (2). The notch (12) is located above the turntable body (1). After the rectangular frame (61) is inserted into the lubrication cavity (2) through the notch (12), the upper end surface of the rectangular frame (61) is clamped in the notch (12) to close the notch (12); a positioning groove is formed on the bottom wall of the lubrication cavity (2), and the bottom wall of the rectangular frame (61) is clamped in the positioning groove.

4. A rotary table based on a pressure - operated work machine according to claim 3, characterized in that: A receiving platform protrudes outwardly on the lower side of the inner wall of the notch (12). The peripheral wall of the upper end surface of the rectangular frame (61) is stepped and abuts on the receiving platform. A sealing ring is arranged on the peripheral wall of the upper end surface of the rectangular frame (61), and the sealing ring is clamped and deformed between the inner wall of the notch (12) and the upper end surface of the rectangular frame (61).

5. A turntable based on a pressure-operated work machine according to claim 1, characterized in that: Liquid guide covers (13) are arranged on both sides of the rectangular frame (61). The outer wall of the liquid guide cover (13) is fixedly arranged on the inner wall of the lubrication cavity (2). The liquid guide cover (13) includes a rectangular cover (131) and a rectangular pipe (132) arranged on the rectangular cover (131). The rectangular pipe (132) communicates with the rectangular cover (131). A plurality of rectangular pipes (132) are provided. The rectangular pipes (132) are located between adjacent first magnets (62). Hydraulic oil enters the rectangular cover (131) and flows through the rectangular pipes (132) to flow between the first magnets (62) and then flows through between the first magnets (62) to the rectangular pipes (132) on the other side.

6. A rotary table based on a pressure-operated work machine according to claim 1, characterized in that: A compaction roller (9) is arranged in the rectangular frame (61). The compaction roller (9) is located on one side of the winding shaft (64). The length direction and the rotation axis of the compaction roller (9) are both parallel to the length direction of the winding shaft (64). The compaction roller (9) is slidably arranged on the rectangular frame (61). A driving member is arranged on the rectangular frame (61) for driving the compaction roller (9) to press against the winding shaft (64) so that the film (63) is compacted on the winding shaft (64).

7. A rotary table based on a pressure - operated work machine according to claim 6, characterized in that: An airbag is sleeved on the peripheral wall of the compaction roller (9), and the airbag is in an inflated state to compact the film (63) onto the winding shaft (64).

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