A power line single pole tower and a method of installing the same

Abstract

The application discloses a power line single-pole tower and a mounting method thereof, which comprises a lower pipe body and an upper pipe body, a lower flange plate is welded at the top end of the lower pipe body, an upper flange plate matched with the lower flange plate is welded at the bottom end of the upper pipe body, a convenient connecting mechanism is arranged in the inside of the upper pipe body, a quick dismounting mechanism is arranged in the inside of the lower pipe body, the convenient connecting mechanism comprises a connecting unit and a locking unit, and the quick dismounting mechanism comprises an adjusting unit and a limiting unit. The extending slide bar is lowered along the annular groove, the screw thread ring on the rotating drum is conveniently self-rotated, locking between the screw thread ring and the outer screw thread sleeve is realized, the lower pipe body and the upper pipe body are connected through the central positioning rod, the stability of the connection between the lower pipe body and the upper pipe body is improved, the mounting strength is improved, and the bevel convex block on the movable rod is in contact with the through groove, so that the bevel convex block limits the positioning ring.

Description

Technical Field

[0001] This invention belongs to the technical field of single-pole towers for power lines, specifically relating to a single-pole tower for power lines and its installation method. Background Technology

[0002] Single-pole towers are the most commonly used cable supports on high-voltage transmission lines. Based on their location and function within the line, single-pole towers include straight-line towers, branch towers, tension towers, and crossing towers.

[0003] Existing power poles are typically designed in a segmented manner during production, meaning they are designed as two or even three sections. During installation, they are assembled using a modular method. However, during the fixing process, because the power poles are connected by flanges, their strength is often insufficient, resulting in poor stability. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a single power line tower and its installation method, which has the advantages of improving the stability of installation between multiple tower sections and improving the installation strength.

[0005] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides a single-pole tower for power lines, comprising a lower pipe body and an upper pipe body. A lower flange is welded to the top of the lower pipe body, and an upper flange matching the lower flange is welded to the bottom of the upper pipe body. A convenient connection mechanism is provided inside the upper pipe body, and a quick disassembly mechanism is provided inside the lower pipe body. The convenient connection mechanism includes a connection unit and a locking unit, and the quick disassembly mechanism includes an adjustment unit and a limiting unit. The connection unit includes a stabilizing seat installed on the inner wall of the upper pipe body. A central positioning rod is welded to the bottom center of the stabilizing seat. An extension slide rod is connected to the outer wall of the central positioning rod, and an external threaded sleeve is connected to the outer wall of the central positioning rod and directly below the extension slide rod.

[0006] Preferably, the connecting unit further includes a rotating cylinder rotatably connected to the inner wall of the upper tube. The inner wall of the rotating cylinder is provided with an annular groove, and the inner wall of the annular groove is slidably connected to the outer wall of the extension slide rod. A threaded ring is connected to the bottom of the rotating cylinder, and the inner wall of the threaded ring is threadedly connected to the outer wall of the outer threaded sleeve.

[0007] Through the above technical solution, the extension slide bar can move downward along the annular groove, and the rotating drum rotates during the downward movement, thereby locking the threaded ring and the external threaded sleeve.

[0008] Preferably, the locking unit includes a positioning ring connected to the bottom of the central positioning rod. The outer wall of the positioning ring is evenly provided with through grooves. A spring is connected to the top of the positioning ring. A pressure ring is connected to the top of the spring. The inner wall of the pressure ring is slidably connected to the outer wall of the central positioning rod. A strip block is connected to the bottom of the pressure ring. The outer wall of the strip block is slidably connected to the inner wall of the through groove.

[0009] Through the above technical solution, the spring can cause the pressure ring to move downward, thereby causing the strip block to move downward, and then causing the strip block to be inserted into the through groove.

[0010] Preferably, the locking unit further includes a hollow cylinder installed on the inner wall of the lower tube. A movable rod is fixedly hinged to the top of the hollow cylinder. A beveled protrusion is welded to the end of the movable rod away from the hollow cylinder. The outer wall of the beveled protrusion is slidably connected to the inner wall of the through groove. A connecting rope is connected to the side of the movable rod, and a center block is connected to the other end of the connecting rope.

[0011] Through the above technical solution, the inclined protrusion on the movable rod contacts the through groove, so that the inclined protrusion limits the positioning ring, and the connecting rope and the center block can make the movable rod clamp the positioning ring.

[0012] Preferably, the adjusting unit includes a guide ring installed on the inner wall of the hollow cylinder. A linkage rod is slidably connected to the inner wall of the guide ring. The top end of the linkage rod passes through the top of the hollow cylinder and is connected to a movable support plate. The outer wall of the movable support plate is slidably connected to the outer wall of the movable rod. An elastic rope is connected to the top of the guide ring. The top end of the elastic rope is connected to the inner wall of the hollow cylinder. A movable piece is connected to the outer wall of the linkage rod and directly below the guide ring. A pull bar is connected to the top of the movable piece. The top of the pull bar is connected to the bottom of the guide ring. A rack is connected to the bottom of the movable piece.

[0013] Through the above technical solution, the rack can drive the linkage rod to move downward through the movable plate, and at the same time the elastic rope can automatically reset the moved linkage rod.

[0014] Preferably, the adjustment unit further includes a support cylinder embedded in the outer wall of the lower tube body, a bearing is installed on the inner wall of the support cylinder, a rotating rod is installed on the inner wall of the bearing, and a gear is installed on the outer wall of the rotating rod inside the lower tube body, the outer wall of the gear meshing with the outer wall of the rack.

[0015] Through the above technical solution, the rotating rod can drive the gear to rotate, and then the position of the rack can be adjusted up and down through the gear.

[0016] Preferably, a fixing frame is slidably connected to the inner wall of the lower tube, and the inner wall of the fixing frame is slidably connected to the outer wall of the rack.

[0017] The above technical solution improves the stability of the rack during its up-and-down movement.

[0018] Preferably, the limiting unit includes a guide groove formed on the outer wall of the rotating rod, a movable ring slidably connected to the inner wall of the guide groove, and a locking block connected to one end edge of the movable ring.

[0019] Through the above technical solution, the movable ring can slide along the guide groove, thereby adjusting the position of the locking block.

[0020] Preferably, the limiting unit further includes a slot formed on the end of the support cylinder away from the lower tube body, and the inner wall of the slot is movably connected to the outer wall of the locking block.

[0021] With the above technical solution, the card block is inserted into the card slot, and the rotating rod can be limited by the movable ring.

[0022] Secondly, the present invention provides a method for installing a single pole tower of a power line, comprising the following steps:

[0023] Step 1: Lift the upper pipe body using hoisting equipment, insert the center positioning rod into the interior of the lower pipe body, and move the extended sliding rod on the center positioning rod down along the annular groove so that the rotating drum and the threaded ring lock with the external threaded sleeve when they rotate.

[0024] Step 2: The positioning ring on the center positioning rod contacts the inclined protrusion on the movable rod, and the movable rod clamps the positioning ring through the connecting rope and the center block;

[0025] Step 3: Connect the rotating rod to an external power device, and drive the rack to move downward through the drive gear, so that the movable plate drives the linkage rod and the movable support plate to move downward, thereby increasing the opening angle of the movable rod, so that the inclined protrusion on the movable rod separates from the through groove, and disassembles the lower tube body and the upper tube body.

[0026] Step 4: After disassembly is complete, the lowered linkage rod is automatically reset via the elastic rope.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. By extending the slide rod down along the annular groove, the threaded ring on the rotating drum can rotate, thereby locking it with the external threaded sleeve. The central positioning rod can connect the lower and upper pipe bodies, thereby improving the stability of the connection between the lower and upper pipe bodies and increasing the installation strength. The beveled protrusion on the movable rod contacts the through groove, which facilitates the beveled protrusion to limit the positioning ring. At the same time, the connecting rope and the central block can make the movable rod clamp the positioning ring, further improving the stability of the central positioning rod.

[0029] 2. The fixed frame improves the stability of the rack when it moves up and down. At the same time, the rotating rod and the gear rotate synchronously, which makes it easy to adjust the position of the rack up and down. The rack drives the linkage rod to move down through the movable plate, which increases the opening angle of the movable rod by the movable support plate. This facilitates the separation between the inclined protrusion on the movable rod and the through groove, and makes it easier to disassemble the lower tube and the upper tube. The elastic force of the elastic rope can make the lowered linkage rod automatically return to its original position.

[0030] 3. By pushing the movable ring along the guide groove, the position of the movable ring and the locking block can be adjusted, so that the locking block can be inserted into the inside of the locking groove, which facilitates the limiting of the rotating rod and prevents the linkage rod from automatically resetting. At the same time, when the rotating rod is limited, it is easy to disassemble the lower tube body and the upper tube body. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a cross-sectional view showing the structural connection between the lower and upper pipe bodies of the present invention.

[0033] Figure 3 This is a cross-sectional view of the structural connection between the central positioning rod and the rotating cylinder of the present invention;

[0034] Figure 4 For the present invention Figure 3 Enlarged view at point C;

[0035] Figure 5 This is a schematic diagram of the structural connection between the hollow cylinder and the movable rod of the present invention;

[0036] Figure 6 This is a cross-sectional view showing the structural connection between the hollow cylinder and the quick-release mechanism of the present invention.

[0037] Figure 7 For the present invention Figure 2 Enlarged view at point B in the middle;

[0038] Figure 8 For the present invention Figure 1 Enlarged view of point A in the middle.

[0039] In the diagram: 1. Lower pipe body; 11. Lower flange; 2. Upper pipe body; 21. Upper flange; 3. Convenient connection mechanism; 31. Stabilizing seat; 32. Center positioning rod; 321. External threaded sleeve; 322. Extension slide rod; 33. Rotary cylinder; 331. Annular groove; 332. Threaded ring; 34. Positioning ring; 341. Through groove; 342. Spring; 343. Pressure ring; 344. Strip block; 35. Hollow cylinder; 351. Movable 352. Moving rod; 353. Beveled protrusion; 354. Connecting rope; 355. Center block; 4. Quick disassembly mechanism; 41. Guide ring; 42. Linkage rod; 421. Movable support plate; 43. Elastic rope; 44. Movable plate; 441. Pull bar; 45. Rack; 451. Fixed frame; 46. Support cylinder; 461. Rotating rod; 462. Gear; 47. Guide groove; 471. Movable ring; 472. Locking block; 473. Locking groove. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1-8 The present invention provides a technical solution: In a first aspect, the present invention provides a single pole tower for a power line, comprising a lower tube body 1 and an upper tube body 2. A lower flange 11 is welded to the top of the lower tube body 1, and an upper flange 21 matching the lower flange 11 is welded to the bottom of the upper tube body 2. A convenient connection mechanism 3 is provided inside the upper tube body 2, and a quick disassembly mechanism 4 is provided inside the lower tube body 1. The convenient connection mechanism 3 includes a connection unit and a locking unit, and the quick disassembly mechanism 4 includes an adjustment unit and a limiting unit. The connection unit includes a stabilizing seat 31 installed on the inner wall of the upper tube body 2. A central positioning rod 32 is welded to the center of the bottom of the stabilizing seat 31. An extension slide rod 322 is connected to the outer wall of the central positioning rod 32, and an external threaded sleeve 321 is connected to the outer wall of the central positioning rod 32 and directly below the extension slide rod 322.

[0042] Specifically, the connecting unit also includes a rotating cylinder 33 rotatably connected to the inner wall of the upper tube 2. The inner wall of the rotating cylinder 33 is provided with an annular groove 331. The inner wall of the annular groove 331 is slidably connected to the outer wall of the extension slide rod 322. A threaded ring 332 is connected to the bottom of the rotating cylinder 33. The inner wall of the threaded ring 332 is threadedly connected to the outer wall of the external threaded sleeve 321. The extension slide rod 322 can move down along the annular groove 331 and rotate the rotating cylinder 33 during the downward movement, thereby locking the threaded ring 332 and the external threaded sleeve 321. Therefore, the center positioning rod 32 can improve the stability of the connection between the lower tube 1 and the upper tube 2, as well as improve the strength after installation.

[0043] Specifically, the locking unit includes a positioning ring 34 connected to the bottom of the central positioning rod 32. The outer wall of the positioning ring 34 has evenly spaced through grooves 341. A spring 342 is connected to the top of the positioning ring 34, and a pressure ring 343 is connected to the top of the spring 342. The inner wall of the pressure ring 343 is slidably connected to the outer wall of the central positioning rod 32. A strip block 344 is connected to the bottom of the pressure ring 343, and the outer wall of the strip block 344 is slidably connected to the inner wall of the through groove 341. The locking unit also includes a hollow cylinder 35 installed on the inner wall of the lower tube 1. A movable rod 351 is fixedly hinged to the top of the hollow cylinder 35. A beveled protrusion 352 is welded to the end of the movable rod 351 away from the hollow cylinder 35, and the outer wall of the beveled protrusion 352 is slidably connected to the inner wall of the through groove 341. A connecting rope 353 is connected to the side of the movable rod 351, and a center block 354 is connected to the other end of the connecting rope 353. The beveled protrusion 352 on the movable rod 351 contacts the through groove 341, so that the beveled protrusion 352 limits the positioning ring 34. The connecting rope 353 and the center block 354 can clamp the positioning ring 34 with the movable rod 351. The spring 341 can move the pressure ring 343 downward, so that the strip block 344 moves downward, and then the strip block 344 is inserted into the through groove 341. This makes it easy for the strip block 344 to fill the through groove 341 after the lower tube 1 and the upper tube 2 are disassembled, and prevents the movable rod 351 and the beveled protrusion 352 from entering the through groove 341 again.

[0044] Specifically, the adjustment unit includes a guide ring 41 installed on the inner wall of the hollow cylinder 35. A linkage rod 42 is slidably connected to the inner wall of the guide ring 41. The top end of the linkage rod 42 passes through the top of the hollow cylinder 35 and is connected to a movable support plate 421. The outer wall of the movable support plate 421 is slidably connected to the outer wall of the movable rod 351. An elastic rope 43 is connected to the top of the guide ring 41. The top end of the elastic rope 43 is connected to the inner wall of the hollow cylinder 35. A movable plate 44 is connected to the outer wall of the linkage rod 42 and directly below the guide ring 41. A pull bar 441 is connected to the top of the movable plate 44. The top of the pull bar 441 is connected to the bottom of the guide ring 41. A rack 45 is connected to the bottom of the movable plate 44. A fixing bracket 451 is slidably connected to the inner wall of the lower tube 1. The inner wall of the fixing frame 451 is slidably connected to the outer wall of the rack 45. The adjustment unit also includes a support cylinder 46 embedded in the outer wall of the lower tube 1. A bearing is installed on the inner wall of the support cylinder 46, and a rotating rod 461 is installed on the inner wall of the bearing. A gear 462 is installed on the outer wall of the rotating rod 461 and inside the lower tube 1. The outer wall of the gear 462 meshes with the outer wall of the rack 45. The fixing frame 451 can improve the stability of the rack 45 when it moves up and down. The gear 462 is driven to move the rack 45 downward by an external power device connected to the rotating rod 461. The rack 45 drives the linkage rod 42 to move downward through the movable piece 44. At the same time, the elastic rope 43 can automatically reset the downward-moving linkage rod 42 for easy installation next time.

[0045] Specifically, the limiting unit includes a guide groove 47 on the outer wall of the rotating rod 461, a movable ring 471 slidably connected to the inner wall of the guide groove 47, and a locking block 472 connected to one edge of the movable ring 471. The limiting unit also includes a locking groove 473 on the end of the support cylinder 46 away from the lower tube 1, the inner wall of the locking groove 473 being movably connected to the outer wall of the locking block 472. By pushing the movable ring 471 along the guide groove 47, the locking block 472 is inserted into the inside of the locking groove 473, limiting the rotating rod 461 and facilitating the disassembly of the lower tube 1 and the upper tube 2.

[0046] The working principle and usage process of this invention are as follows: When installing the lower pipe body 1 and the upper pipe body 2, the lower pipe body 1 is installed first. The upper pipe body 2 is lifted by a hoisting device, allowing the central positioning rod 32 to penetrate into the lower pipe body 1. The extended sliding rod 322 on the central positioning rod 32 moves down along the annular groove 331, causing the rotating drum 33 and the threaded ring 332 to rotate. Therefore, the threaded ring 332 is locked with the external threaded sleeve 321. Thus, the central positioning rod 32 improves the stability of the connection between the lower pipe body 1 and the upper pipe body 2, and increases the strength after installation. During the downward movement of the central positioning rod 32, the inclined protrusion 352 on the movable rod 351 contacts the through groove 341. The movable rod is then connected by the connecting rope 353 and the central block 354. 351 clamps the positioning ring 34. When disassembling the lower tube 1 and the upper tube 2, the gear 462 is driven to move the rack 45 downward by the external power device connected to the rotating rod 461. This causes the movable plate 44 to move the linkage rod 42 downward. The movable support plate 421 on the linkage rod 42 moves downward to increase the opening angle of the movable rod 351, so that the inclined protrusion 352 on the movable rod 351 is separated from the through groove 341. The movable ring 471 is pushed by hand to move along the guide groove 47, so that the locking block 472 is inserted into the slot 473, limiting the rotating rod 461, thereby disassembling the lower tube 1 and the upper tube 2. After the disassembly is completed, the elastic force of the elastic rope 43 causes the downward-moving linkage rod 42 to automatically return to its original position.

[0047] Secondly, the present invention provides a method for installing a single pole tower of a power line, comprising the following steps:

[0048] Step 1: Lift the upper pipe body 2 using hoisting equipment, insert the center positioning rod 32 into the interior of the lower pipe body 1, and move the extension slide rod 322 on the center positioning rod 32 down along the annular groove 331 so that the rotating drum 33 and the threaded ring 332 lock with the external threaded sleeve 321 when they rotate.

[0049] Step 2: The positioning ring 34 on the center positioning rod 32 contacts the inclined protrusion 352 on the movable rod 351, and the movable rod 351 clamps the positioning ring 34 through the connecting rope 353 and the center block 354.

[0050] Step 3: Connect the rotating rod 461 to an external power device, and drive the gear 462 to move the rack 45 downward, so that the movable plate 44 drives the linkage rod 42 and the movable support plate 421 to move downward, thereby increasing the opening angle of the movable rod 351, so that the inclined protrusion 352 on the movable rod 351 separates from the through groove 341, and disassembles the lower tube 1 and the upper tube 2.

[0051] Step 4: After disassembly is complete, the lowered linkage rod 42 is automatically reset via the elastic rope 43.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single pole tower of electric power line, comprising a lower tube (1) and an upper tube (2), the top end of the lower tube (1) is welded with a lower flange (11), the bottom end of the upper tube (2) is welded with an upper flange (21) matched with the lower flange (11), characterized in that: The inside of the upper pipe body (2) is provided with a convenient connection mechanism (3), and the inside of the lower pipe body (1) is provided with a quick disassembly mechanism (4); The convenient connection mechanism (3) comprises a connecting unit and a locking unit, and the quick disassembly mechanism (4) comprises an adjusting unit and a limiting unit; The connecting unit comprises a stable seat (31) mounted on the inner wall of the upper pipe body (2), a center positioning rod (32) is welded at the bottom center of the stable seat (31), an extension slide rod (322) is connected to the outer wall of the center positioning rod (32), and an outer threaded sleeve (321) is connected to the outer wall of the center positioning rod (32) and located directly below the extension slide rod (322); The connecting unit further comprises a rotating cylinder (33) rotatably connected to the inner wall of the upper pipe body (2), an annular groove (331) is formed in the inner wall of the rotating cylinder (33), the inner wall of the annular groove (331) is in sliding connection with the outer wall of the extension slide rod (322), and a threaded ring (332) is connected to the bottom of the rotating cylinder (33), and the inner wall of the threaded ring (332) is in threaded connection with the outer wall of the outer threaded sleeve (321).

2. A single pole line tower according to claim 1, characterized in that: The locking unit comprises a positioning ring (34) connected to the bottom of the center positioning rod (32), through grooves (341) are uniformly formed in the outer wall of the positioning ring (34), a spring (342) is connected to the top of the positioning ring (34), a pressing ring (343) is connected to the top of the spring (342), the inner wall of the pressing ring (343) is in sliding connection with the outer wall of the center positioning rod (32), a strip-shaped block (344) is connected to the bottom of the pressing ring (343), and the outer wall of the strip-shaped block (344) is in sliding connection with the inner wall of the through groove (341).

3. A single pole line tower according to claim 2, wherein: The locking unit further comprises a hollow cylinder (35) mounted on the inner wall of the lower pipe body (1), a movable rod (351) is hingedly fixed to the top end of the hollow cylinder (35), an oblique edge protrusion (352) is welded to the end of the movable rod (351) away from the hollow cylinder (35), the outer wall of the oblique edge protrusion (352) is in sliding connection with the inner wall of the through groove (341), a connecting rope (353) is connected to the side surface of the movable rod (351), and the other end of the connecting rope (353) is connected to a center block (354).

4. A single pole line tower according to claim 3, wherein: The adjusting unit comprises a guide ring (41) mounted on the inner wall of the hollow cylinder (35), a linkage rod (42) is in sliding connection with the inner wall of the guide ring (41), the top end of the linkage rod (42) penetrates through the top of the hollow cylinder (35) and is connected with a movable support disc (421), the outer wall of the movable support disc (421) is in sliding connection with the outer wall of the movable rod (351), the top of the guide ring (41) is connected with an elastic rope (43), the top end of the elastic rope (43) is connected with the inner wall of the hollow cylinder (35), the outer wall of the linkage rod (42) and located directly below the guide ring (41) is connected with a movable piece (44), the top of the movable piece (44) is connected with a pull strip (441), the top of the pull strip (441) is connected with the bottom of the guide ring (41), the bottom of the movable piece (44) is connected with a gear rack (45).

5. A power line single pole tower according to claim 4, characterized in that: The adjusting unit further comprises a supporting cylinder (46) fixedly installed on the outer wall of the lower pipe body (1), the inner wall of the supporting cylinder (46) is installed with a bearing, the inner wall of the bearing is installed with a rotating rod (461), the outer wall of the rotating rod (461) and located inside the lower pipe body (1) is installed with a gear (462), and the outer wall of the gear (462) is in mesh with the outer wall of the rack (45).

6. A power line single pole tower according to claim 5, characterized in that: The inner wall of the lower pipe body (1) is slidably connected with a fixing frame (451), and the inner wall of the fixing frame (451) is slidably connected with the outer wall of the rack (45).

7. A power line single pole tower according to claim 6, characterized in that: The limiting unit comprises a guide groove (47) formed in the outer wall of the rotating rod (461), the inner wall of the guide groove (47) is slidably connected with a movable ring (471), and one end edge of the movable ring (471) is connected with a clamping block (472).

8. A power line single pole tower according to claim 7, characterized in that: The limiting unit further comprises a clamping groove (473) formed in the end of the supporting cylinder (46) away from the lower pipe body (1), and the inner wall of the clamping groove (473) is movably connected with the outer wall of the clamping block (472).

9. A method of installing a single pole tower for a power line according to claim 8, wherein The method comprises the following steps: Step one: hoist the upper pipe body (2) by hoisting equipment, make the center positioning rod (32) deeply into the inside of the lower pipe body (1), and make the extension slide rod (322) on the center positioning rod (32) move downward along the annular groove (331), so that the rotating cylinder (33) and the threaded ring (332) are locked with the outer threaded sleeve (321) when self-rotating; Step two: the positioning ring (34) on the center positioning rod (32) is in contact with the beveled protrusion (352) on the movable rod (351), the movable rod (351) is clamped to the positioning ring (34) through the connecting rope (353) and the center block (354); Step three: the outer power equipment of the rotating rod (461) drives the gear (462) to move the rack (45) downward, the movable piece (44) drives the linkage rod (42) and the movable supporting disc (421) to move downward, the angle of the movable rod (351) is increased, the beveled protrusion (352) on the movable rod (351) is separated from the through groove (341), and the lower pipe body (1) and the upper pipe body (2) are disassembled; Step four: after the disassembly is completed, the linkage rod (42) is automatically reset by the elastic rope (43).

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