Installation device of plug valve

Abstract

The invention discloses an installation device for a plug valve, comprising: a fixed base, a rotating frame, a sliding block, a vertical adjustment component, a horizontal adjustment component, a screw-on docking component, a screw-on working cylinder and a rotating shaft pipe, wherein the rotating frame can be installed on the fixed base rotatably around the vertical direction, the sliding block is slidably arranged on the rotating frame, the vertical adjustment component can control the sliding block to move in the vertical direction, the horizontal adjustment component is arranged on the sliding block, the screw-on working cylinder is connected to the horizontal adjustment component, the horizontal adjustment component can control the screw-on working cylinder to move in the horizontal direction, the rotating shaft pipe is coaxially and rotatably inserted in the screw-on working cylinder, the bottom end of the rotating shaft pipe is provided with a thread for connecting an oil pipe, the top end of the rotating shaft pipe is provided with a thread for connecting a plug valve, the screw-on docking component is connected to the rotating shaft pipe, and the screw-on docking component can control the rotating shaft pipe to rotate. The invention can complete the installation operation of the plug valve during well kick or overflow, reduce the installation difficulty, and improve safety.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum well repairing, in particular to an installation device for a plug valve. Background Art

[0002] During well repair in oilfield, it is usually necessary to pull the pipe string out of the wellhead, clean, measure, reassemble and replace the downhole tools, and then lower the pipe string into the well one by one. In this process, factors such as loss of well killing fluid, untimely wellbore liquid surface injection, abnormal formation pressure, etc. can easily cause the bottom hole pressure to be greater than the wellbore liquid column pressure, resulting in well kick and overflow at the wellhead. In response to well kick and overflow, the blowout preventer installed at the wellhead is usually closed to control the annular pressure, and the plug valve is used to control the pressure in the pipe string to complete the well shut-in action, thereby preventing the well fluid from overflowing from the well.

[0003] At present, when a well kick or overflow occurs during a well repair operation, the plug valve is usually fastened and tightened on the wellhead pipe string by manpower.

[0004] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0005] The impact force of the liquid sprayed out by well kick or overflow is relatively large, and it is difficult to complete the installation of the plug valve by manpower. The operation is risky and may easily cause safety hazards. Summary of the invention

[0006] The embodiment of the present invention provides a plug valve installation device, which can complete the installation of the plug valve during well kick or overflow, thereby reducing the installation difficulty and improving safety. The technical solution is as follows:

[0007] The cam is configured to move the piston rod of the piston rod and the piston rod of the piston rod so that the piston rod can move along the cam direction and the piston rod ...

[0008] In one implementation of the embodiment of the present invention, the rotating frame includes a turntable, two guide plates, and a top plate arranged on the fixed base, the two guide plates are arranged vertically opposite to each other on the turntable, the top plate is connected between the two guide plates, the top plate, the turntable and the two guide plates form a rectangular slide groove, and the sliding block is slidably arranged in the rectangular slide groove.

[0009] In another implementation of the embodiment of the present invention, the vertical adjustment assembly includes a vertical lead screw, which is inserted into the top plate, rotatably connected to the sliding block, and threadedly connected to the top plate.

[0010] In another implementation of the embodiment of the present invention, the horizontal adjustment assembly includes: a first guide cylinder, a horizontal adjustment shaft and a horizontal lead screw, the first guide cylinder is fixedly inserted on the sliding block, the horizontal adjustment shaft can be horizontally slidably inserted in the first guide cylinder, the horizontal lead screw is coaxially inserted at one end of the first guide cylinder and is threadedly connected to the first guide cylinder, the horizontal lead screw is rotatably connected to one end of the horizontal adjustment shaft, and the other end of the horizontal adjustment shaft is connected to the cylinder wall of the screw working cylinder.

[0011] In another implementation of the embodiment of the present invention, the turn button docking assembly includes a turn button adjusting rod, one end of which is inserted into the turn button working cylinder, and the turn button adjusting rod is transmission-connected to the rotating shaft tube.

[0012] In another implementation of the embodiment of the present invention, a first bevel gear is coaxially sleeved on the turn-button adjusting rod, a second bevel gear is coaxially sleeved on the rotating shaft tube, and the first bevel gear and the second bevel gear are meshed.

[0013] In another implementation of the embodiment of the present invention, the turn-lock docking assembly further includes a second guide cylinder, the second guide cylinder is fixedly inserted on the sliding block, and the turn-lock adjusting rod is movably inserted in the second guide cylinder.

[0014] In another implementation of the embodiment of the present invention, an adjusting hand wheel is provided on the rotary knob adjusting rod.

[0015] In another implementation of the embodiment of the present invention, the rotating shaft tube is installed in the spin-on working cylinder through a bearing, and working cylinder end covers are installed at both ends of the spin-on working cylinder, and the bearing is located between the two working cylinder end covers.

[0016] In another implementation manner of the embodiment of the present invention, the fixed base is ring-shaped.

[0017] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0018] The embodiment of the present invention is to install the rotating frame on the fixed base so that it can rotate around the vertical direction, and slide the sliding block on the rotating frame so that the sliding block can rotate with the rotating frame, and control the sliding block to move in the vertical direction through the vertical adjustment component, so that the sliding block can be controlled to move vertically. At the same time, the horizontal adjustment component is arranged on the sliding block, and the horizontal adjustment component is used to control the spin button working cylinder to move in the horizontal direction, so as to realize the movement of the spin button working cylinder in the horizontal direction. The rotating shaft tube is also coaxially rotatably inserted in the spin button working cylinder, and the rotation of the rotating shaft tube is controlled by the spin button docking component. When the plug valve is installed in a hurry, the plug valve can be installed on the top of the rotating shaft tube, and one end of the rotating shaft tube can be rotatably docked with the pipe column at the wellhead by controlling the rotation of the rotating shaft tube. The present invention adjusts the spin button working cylinder vertically and horizontally through the vertical adjustment component and the horizontal adjustment component, and uses the spin button docking component to rotatably dock the pipe column connecting shaft with the pipe column at the wellhead, avoiding manual operation in the process, improving safety, and the installation device can withstand greater impact force than manual installation, so as to facilitate the rapid installation of the plug valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of a mounting device for a plug valve provided in an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of a mounting device for a plug valve provided by an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 AA section view in;

[0023] The symbols in the figure mean the following:

[0024] 1-fixed base, 21-rotating frame, 22-sliding block, 23-vertical screw, 24-top plate, 25-locking ball head, 26-ball head locking ring, 27-rotating rod, 28-turntable, 29-guide plate, 31-first guide cylinder, 32-horizontal screw, 33-horizontal adjustment shaft, 34-guide cylinder pressure cover, 41-second guide cylinder, 42-spindle adjustment rod, 43-first bevel gear, 44-second bevel gear, 5-spindle working cylinder, 6-rotating shaft tube, 7-working cylinder pressure cover, 8-adjusting handwheel. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Figure 1 is a schematic diagram of the structure of a plug valve installation device provided by an embodiment of the present invention, such as Figure 1 As shown, the installation device includes: a fixed base 1, a rotating frame 21, a sliding block 22, a vertical adjustment component, a horizontal adjustment component, a screw-in joint component, a screw-in working cylinder 5 and a rotating shaft tube 6. The rotating frame 21 is rotatably mounted on the fixed base 1 around the vertical direction, and the sliding block 22 is slidably arranged on the rotating frame 21. The vertical adjustment component can control the sliding block 22 to move in the vertical direction, the horizontal adjustment component is arranged on the sliding block 22, the screw-in working cylinder 5 is connected to the horizontal adjustment component, and the axis of the screw-in working cylinder 5 is vertical. The horizontal adjustment component can control the screw-in working cylinder 5 to move in the horizontal direction, the rotating shaft tube 6 is coaxially rotatably inserted in the screw-in working cylinder 5, the bottom end of the rotating shaft tube 6 is provided with a thread for connecting the oil pipe, the top end of the rotating shaft tube 6 is provided with a thread for connecting the plug valve, the screw-in joint component is connected to the rotating shaft tube 6, and the screw-in joint component can control the rotation of the rotating shaft tube 6.

[0027] The embodiment of the present invention is to install the rotating frame on the fixed base so that it can rotate around the vertical direction, and slide the sliding block on the rotating frame so that the sliding block can rotate with the rotating frame, and control the sliding block to move in the vertical direction through the vertical adjustment component, so that the sliding block can be controlled to move vertically. At the same time, the horizontal adjustment component is arranged on the sliding block, and the horizontal adjustment component is used to control the spin button working cylinder to move in the horizontal direction, so as to realize the movement of the spin button working cylinder in the horizontal direction. The rotating shaft tube is also coaxially rotatably inserted in the spin button working cylinder, and the rotation of the rotating shaft tube is controlled by the spin button docking component. When the plug valve is installed in a hurry, the plug valve can be installed on the top of the rotating shaft tube, and one end of the rotating shaft tube can be rotatably docked with the pipe column at the wellhead by controlling the rotation of the rotating shaft tube. The present invention adjusts the spin button working cylinder vertically and horizontally through the vertical adjustment component and the horizontal adjustment component, and uses the spin button docking component to rotatably dock the pipe column connecting shaft with the pipe column at the wellhead, avoiding manual operation in the process, improving safety, and the installation device can withstand greater impact force than manual installation, so as to facilitate the rapid installation of the plug valve.

[0028] Figure 2 is a cross-sectional view of a mounting device for a plug valve provided by an embodiment of the present invention, such as Figure 2As shown, the rotating frame 21 includes a rotating table 28, two guide plates 29, and a top plate 24 arranged on the fixed base 1. The two guide plates 29 are arranged vertically and directly opposite to each other on the rotating table 28, and the top plate 24 is connected between the two guide plates 29. The top plate 24, the rotating table 28, and the two guide plates 29 form a rectangular slide groove, and the sliding block 22 is slidably arranged in the rectangular slide groove. In the embodiment of the present invention, the rotating table 28 is in the shape of a truncated cone, and a rotating rod 27 is provided on the bottom surface of the rotating table 28. A through hole is provided on the fixed base 1, and the rotating rod 27 can be inserted into the through hole of the fixed base 1 in a self-rotating manner. Among a group of opposite side edges of the guide plate 29, one side edge is fixedly connected to the top surface of the turntable 28, and the other side edge is fixedly connected to the top plate 24, so that the top plate 24, the turntable 28 and the two guide plates 29 form a rectangular slide groove, which is convenient for the sliding block 22 to slide vertically therein, wherein the top plate 24 can be fixed to the two guide plates 29 by bolts, which is convenient for the quick disassembly of the top plate 24.

[0029] Figure 3 yes Figure 2 The AA section view in Figure 3 As shown, the two guide plates 29 are provided with vertically extending grooves a on the opposite sides, and the two opposite sides of the sliding block 22 are provided with vertically extending protrusions b. The sliding block 22 slides vertically in the rotating frame 21 through the protrusions and the grooves, which guide the sliding of the sliding block 22 and prevent the sliding block 22 from escaping from the grooves, thereby improving safety.

[0030] Optionally, after the rotating frame 21 is inserted into the through hole through the rotating rod 27, a stopper may be provided at the end of the rotating rod 27 to lock the rotating frame 21 on the fixed base 1. In the embodiment of the present invention, the stopper may be a nut, which cooperates with the external thread at the end of the rotating rod 27 to prevent the rotating frame 21 from being separated from the fixed base 1.

[0031] like Figure 1 , 2 As shown, the vertical adjustment assembly may include a vertical lead screw 23, which is inserted on the top plate 24, and the vertical lead screw 23 is rotatably connected to the sliding block 22, and the vertical lead screw 23 is threadedly connected to the top plate 24. The sliding block 22 can be driven to slide in the rectangular slide groove by the vertical lead screw 23. In the embodiment of the present invention, since the sliding block 22 is connected to the turnbuckle working cylinder 5 through the horizontal adjustment assembly, and the horizontal adjustment assembly is arranged on the sliding block, the turnbuckle working cylinder 5 can be driven to move vertically through the vertical adjustment assembly.

[0032] In the embodiment of the present invention, in order to realize the rotatable connection between the vertical screw 23 and the sliding block 22, a locking ball head 25 is provided at one end of the vertical screw 23 connected to the sliding block 22, and a ball head locking groove for accommodating the locking ball head 25 is provided on the side surface where the sliding block 22 is connected to the vertical screw 23, and a ball head locking ring 26 is fixedly provided at the opening of the ball head locking groove. The inner diameter of the ball head locking ring 26 is not larger than the outer diameter of the locking ball head 25. The ball head locking ring 26 can limit the locking ball head 25 in the ball head locking groove, and the locking ball head 25 can rotate freely in the ball head locking groove, thereby realizing the rotatable connection between the vertical screw 23 and the sliding block 22.

[0033] The horizontal adjustment assembly may include a first guide cylinder 31, a horizontal adjustment shaft 33 and a horizontal lead screw 32. The first guide cylinder 31 is fixedly inserted on the sliding block 22. The horizontal adjustment shaft 33 can be inserted horizontally and slidably in the first guide cylinder 31. The horizontal lead screw 32 is coaxially inserted at one end of the first guide cylinder 31 and is threadedly connected to the first guide cylinder 31. The horizontal lead screw 32 is rotatably connected to one end of the horizontal adjustment shaft 33. The other end of the horizontal adjustment shaft 33 is connected to the cylinder wall of the screw-on working cylinder 5. Among them, a through hole for the first guide cylinder 31 to pass through can be provided on the sliding block 22. After the first guide cylinder 31 is inserted into the through hole, it is fixed in the through hole. The fixing method can be welding. A locking ball head can also be provided at one end of the horizontal lead screw 32. A ball head locking groove and a ball head locking ring can be provided on the horizontal adjustment shaft 33. The horizontal lead screw 32 and the horizontal adjustment shaft 33 are connected through the locking ball head and the ball head locking groove.

[0034] When realizing the threaded connection between the horizontal screw 32 and the first guide cylinder 31, in some embodiments of the present invention, the diameter of the horizontal screw 32 can be set to be the same as the inner diameter of the first guide cylinder 31, so that the horizontal screw 32 and the first guide cylinder 31 are threadedly matched, and when the horizontal screw 32 is rotated, the horizontal adjustment shaft 33 is driven to move horizontally.

[0035] In other embodiments of the present invention, if the diameter of the horizontal screw 32 is smaller than the inner diameter of the first guide cylinder 31, a guide cylinder gland 34 (such as Figure 1 As shown in FIG. 3 , a threaded hole that matches the horizontal lead screw 32 is provided on the guide cylinder pressure cover 34. By rotating the horizontal lead screw 32, the horizontal adjustment shaft 33 can be driven to move horizontally, thereby driving the horizontal displacement of the spindle working cylinder 5.

[0036] The spin-lock docking assembly may include a spin-lock adjusting rod 42, one end of which is inserted into the spin-lock working cylinder 5, and the spin-lock adjusting rod 42 is transmission-connected with the rotating shaft tube 6. By setting the spin-lock adjusting rod 42 to be inserted into the spin-lock working cylinder 5 and transmission-connected with the rotating shaft tube 6, the rotating shaft tube 6 can be driven to rotate by rotating the spin-lock adjusting rod 42, so as to rotate and dock the rotating shaft tube 6 with the pipe string at the wellhead.

[0037] like Figure 1 As shown, a first bevel gear 43 is coaxially sleeved on the turn-lock adjusting rod 42, and a second bevel gear 44 is coaxially sleeved on the rotating shaft tube 6, and the first bevel gear 43 and the second bevel gear 44 are meshed. The first bevel gear 43 is sleeved on the turn-lock adjusting rod 42, and the first bevel gear 43 can be limited by a flat key; the second bevel gear 44 is sleeved on the rotating shaft tube 6, and the second bevel gear 44 can also be limited by a flat key. In the embodiment of the present invention, the rotation of the turn-lock adjusting rod 42 is converted into the rotation of the rotating shaft tube 6 by vertically meshing the first bevel gear 43 and the second bevel gear 44.

[0038] Optionally, a bearing is provided on the turn button adjusting rod 42, the bearing is supported on the cylinder wall of the rotating shaft tube 6, and the turn button adjusting rod 42 is inserted into the bearing. The bearing can facilitate the rotation of the turn button adjusting rod 42.

[0039] In some implementations of the present invention, the turn-lock docking assembly may further include a second guide cylinder 41, which is fixedly inserted on the sliding block 22, and the turn-lock adjustment rod 42 is movably inserted in the second guide cylinder 41. A through hole for the second guide cylinder 41 to pass through may be provided on the sliding block 22, and the second guide cylinder 41 is fixed in the through hole after being inserted into the through hole, and the fixing method may be welding. In an embodiment of the present invention, the turn-lock adjustment rod 42 is rotatably inserted in the second guide cylinder 41, and the rotating shaft tube 6 is driven to rotate by rotating the turn-lock adjustment rod 42, so as to facilitate the rapid completion of the rotational docking of the rotating shaft tube 6 with the pipe column of the wellhead. At the same time, the second guide cylinder 41 is arranged so that the turn-lock adjustment rod 42 and the horizontal lead screw 32 are on the same side, which is convenient for the adjustment operation of the technician.

[0040] In the embodiment of the present invention, the rotating shaft tube 6 is installed in the spindle working cylinder 5 through a bearing, and both ends of the spindle working cylinder 5 are installed with a working cylinder end cover, and the bearing is located between the two working cylinder end covers. Figure 1 As shown, both ends of the spin-lock working cylinder 5 are equipped with working cylinder end covers, and both ends of the rotating shaft tube 6 are sleeved with bearings, and the two bearings are arranged between the working cylinder end covers and the shaft shoulders of the rotating shaft tube 6. The shaft shoulders and the working cylinder end covers are used for limiting, and the bearings can be stably fixed on the rotating shaft tube 6. The working cylinder end covers can be detachably fixed on the spin-lock working cylinder 5 by bolts.

[0041] like Figure 1 , 2 As shown, the knob adjusting rod 42 is provided with an adjusting hand wheel 8. Similarly, the vertical lead screw 23 and the horizontal lead screw 32 may also be provided with an adjusting hand wheel 8. In the embodiment of the present invention, the adjusting hand wheel 8 is provided to facilitate the rotation of the knob adjusting rod 42, the horizontal lead screw 32 and the vertical lead screw 23, thereby improving operability.

[0042] In one implementation of the present invention, the fixed base 1 is annular. Figure 1 As shown, a ring-shaped base is provided in the middle of the fixed base 1 for the pipe string of the wellhead to pass through. The ring-shaped base is convenient for the rotational docking of the pipe string and the rotating shaft tube 6, so as to quickly complete the installation of the plug valve.

[0043] When installing a plug valve by using a plug valve installation device provided by an embodiment of the present invention, after installing a blowout preventer at the wellhead, first, the fixed base is installed on the blowout preventer by bolt connection, and the various components of the installation device are connected and placed near the wellhead for standby use. The plug valve is connected to the rotating pipe column by threads and fastened together by fasteners. When overflow is found at the wellhead and a well blowout danger occurs, the installation device is lifted as a whole, the rotating rod at the bottom of the rotating frame is passed through the through hole of the fixed base, and quickly locked and fixed. At this time, the operator stands on the side of the wellhead and rotates the rotating frame, the adjusting handwheel on the horizontal screw and the vertical screw to align the rotating pipe shaft with the pipe column to complete the buckle. Then rotate the adjusting handwheel of the buckle adjusting rod, and drive the rotating pipe shaft to rotate through the meshing action of the first bevel gear and the second bevel gear. At the same time, rotate the adjusting handwheel of the vertical screw to push the sliding block vertically downward, driving the rotating pipe shaft downward. Continue to rotate the adjusting handwheel of the buckle adjusting rod until the buckle action of the rotating pipe shaft and the pipe column is completed. Then close the plug valve and the wellhead blowout preventer to close the wellhead.

[0044] An installation device for a plug valve provided in an embodiment of the present invention is connected to a blowout preventer through a fixed base, which provides a fixed foundation for the installation device, does not occupy the wellhead space, and has a reliable connection. The installation device has 360-degree circumferential, vertical, and horizontal adjustment functions, and realizes the docking of the plug valve with the tubing in the well in all directions. At the same time, the installation device is designed with a rotary buckle docking assembly to avoid manual rotary buckle docking of the plug valve and the tubing, reducing the safety risks of the operators. In addition, the installation device has a function of preventing the tubing from rising. When the upward force caused by the pressure in the well on the tubing is greater than the weight of the tubing, the tubing can be fixed in the well to prevent the tubing from rising out of control.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plug valve installation device, characterized in that: The installation device comprises: a fixed base (1), a rotating frame (21), a sliding block (22), a vertical adjustment component, a horizontal adjustment component, a turn-lock docking component, a turn-lock working cylinder (5) and a rotating shaft tube (6). The rotating frame (21) is mounted on the fixed base (1) so as to be rotatable in a vertical direction, the sliding block (22) is slidably arranged on the rotating frame (21), and the vertical adjustment component is capable of controlling the sliding block (22) to move in a vertical direction. The horizontal adjustment component is arranged on the sliding block (22), the spindle working cylinder (5) is connected to the horizontal adjustment component, the axis of the spindle working cylinder (5) is vertical, and the horizontal adjustment component can control the spindle working cylinder (5) to move in a horizontal direction. The rotating shaft tube (6) is coaxially and rotatably inserted into the spindle working cylinder (5); the bottom end of the rotating shaft tube (6) is provided with a thread for connecting to an oil pipe; the top end of the rotating shaft tube (6) is provided with a thread for connecting to a plug valve; the spindle docking assembly is connected to the rotating shaft tube (6); and the spindle docking assembly can control the rotation of the rotating shaft tube (6); The rotating frame (21) comprises a rotating table (28), two guide plates (29) and a top plate (24) arranged on the fixed base (1); the two guide plates (29) are arranged vertically opposite to each other on the rotating table (28); the top plate (24) is connected between the two guide plates (29); the top plate (24), the rotating table (28) and the two guide plates (29) form a rectangular slide groove; the sliding block (22) is slidably arranged in the rectangular slide groove; The horizontal adjustment assembly comprises: a first guide cylinder (31), a horizontal adjustment shaft (33) and a horizontal lead screw (32); the first guide cylinder (31) is fixedly inserted on the sliding block (22); the horizontal adjustment shaft (33) is inserted in the first guide cylinder (31) in a horizontally slidable manner; the horizontal lead screw (32) is coaxially inserted at one end of the first guide cylinder (31) and is threadedly connected to the first guide cylinder (31); the horizontal lead screw (32) is rotatably connected to one end of the horizontal adjustment shaft (33); and the other end of the horizontal adjustment shaft (33) is connected to the cylinder wall of the spindle working cylinder (5); The turn-lock docking assembly comprises a turn-lock adjusting rod (42), one end of which is inserted into the turn-lock working cylinder (5), and the turn-lock adjusting rod (42) is transmission-connected to the rotating shaft tube (6); a first bevel gear (43) is coaxially sleeved on the turn-lock adjusting rod (42), and a second bevel gear (44) is coaxially sleeved on the rotating shaft tube (6), and the first bevel gear (43) and the second bevel gear (44) are meshed.

2. The mounting device according to claim 1, characterized in that: The vertical adjustment assembly comprises a vertical lead screw (23), the vertical lead screw (23) is inserted into the top plate (24), the vertical lead screw (23) is rotatably connected to the sliding block (22), and the vertical lead screw (23) is threadedly connected to the top plate (24).

3. The mounting device according to claim 1, characterized in that: The turn-lock docking assembly further comprises a second guide cylinder (41), the second guide cylinder (41) being fixedly inserted on the sliding block (22), and the turn-lock adjusting rod (42) being movably inserted in the second guide cylinder (41).

4. The mounting device according to claim 1, characterized in that: The rotary adjustment rod (42) is provided with an adjustment hand wheel (8).

5. The mounting device according to any one of claims 1 to 4, characterized in that: The rotating shaft tube (6) is installed in the spin-on working cylinder (5) via a bearing, and working cylinder end covers are installed at both ends of the spin-on working cylinder (5), and the bearing is located between the two working cylinder end covers.

6. The mounting device according to any one of claims 1 to 4, characterized in that: The fixed base (1) is ring-shaped.

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