Occupied pup joint hoisting tool

Abstract

The invention provides an occupying short section hoisting tool, and relates to the technical field of hoisting, the occupying short section hoisting tool comprises a hoisting rod, the top of the hoisting rod is fixedly connected with a hoisting ring, the bottom end of the hoisting rod is fixedly connected with a U-shaped hoisting hook assembly through a locking piece, one end, far away from the hoisting rod, of the U-shaped hoisting hook assembly is fixedly provided with a back-off assembly, and the hoisting rod is provided with a three-section type safety stop block. By adopting the combined structure of the back-off assembly and the three-section type safety check block, under one condition, the lower-section check block rotates to the position over a flange hole of the occupied short section and is matched with the back-off assembly, and dual safety assurance can be achieved; under one condition, the upper-section stop block is rotated to the position over the flange hole of the occupied short section, a constructor can quickly take out the inverted buckle assembly, and the use is safer, simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting, in particular to a place-occupying short-section hoisting tool. Background Art

[0002] The placeholder nipples are divided into tubing nipples and casing nipples. In the pipe connection, the flanging nipples are generally used in conjunction with flanges. Specifically, they are put into the flanges, and then the tail is welded to the steel pipe. At this time, the flange can slide. As long as it is a flange of a certain specification, it can be connected at any time. It is widely used in rigid oil pipelines (metal pipes).

[0003] The well control workshop needs to repair and maintain a large number of placeholder short sections, and lifting operations will be frequently performed during the inspection and maintenance process. At present, there is a lack of special lifting tools for the lifting of placeholder short sections in China, and lifting cannot be carried out safely and conveniently. To address this problem, we need to seek a safer and simpler lifting method. Summary of the invention

[0004] Technical issues solved In view of the deficiencies in the prior art, the present invention provides a placeholder short section lifting tool, which solves the problem that there is a lack of special lifting tools for the lifting of the placeholder short section and the lifting cannot be performed safely and conveniently.

[0005] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a place-occupying short section lifting tool, comprising a lifting rod, the top of which is fixedly connected to a lifting ring, the bottom of which is fixedly connected to a U-shaped hook assembly through a locking member, and an undercut assembly is fixedly installed at one end of the U-shaped hook assembly away from the lifting rod; The middle section of the suspension rod is provided with a threaded portion, an upper limit nut is threadedly connected to the threaded portion, a lower cushion is sleeved on the suspension rod and located above the locking member, the upper limit nut is located above the lower cushion, and a gap is provided between the upper limit nut and the lower cushion, and a three-stage safety block is sleeved on the suspension rod and located at the gap between the upper limit nut and the lower cushion; The three-stage safety block includes a middle block, one side of the middle block is fixedly connected to the lower block via a downward transition bending portion, the side of the middle block away from the lower block is fixedly connected to the upper block via an upward transition bending portion, and the upper block is slidably connected to a vertically arranged card removal cylinder, which corresponds to the inverted buckle assembly.

[0006] Preferably, a bottom connecting portion is provided at the bottom end of the suspension rod, and the U-shaped hook assembly includes a transverse portion, and the two ends of the transverse portion are respectively fixedly connected with a first vertical portion and a second vertical portion, a top connecting portion is provided on the side of the first vertical portion, and the top connecting portion and the bottom connecting portion are interlockingly connected, and a threaded hole is provided at the top of the second vertical portion.

[0007] Preferably, the locking member includes a first half ring body and a second half ring body, the first half ring body and the second half ring body are buckled on the outside of the top connecting part and the bottom connecting part, and the first half ring body and the second half ring body are fixedly connected by screws.

[0008] Preferably, the undercut assembly comprises a long screw, the bottom end of the long screw is threadedly connected to the threaded hole, the top end of the long screw is fixedly connected to a limiting shoulder, the side of the limiting shoulder is provided with an insertion eye, the top of the limiting shoulder is fixedly connected to a neck, the outer side of the neck is sleeved with an elastic ring, the top of the neck is fixedly connected to a pentagonal prism connector, the top of the pentagonal prism connector is provided with five annularly distributed mounting ports, the inner side of each of the mounting ports is provided with an L-shaped sliding port, the top center position of the pentagonal prism connector is fixedly connected to a threaded top head, a connecting ear is provided in the mounting port, the side of the connecting ear and the inner side of the L-shaped sliding port are fixedly connected with a shaft body, the outer side of the connecting ear is fixedly connected with an umbrella-shaped tile, the elastic ring is located on the inner side of the umbrella-shaped tile, a limiting ring is sleeved on the threaded top head, the bottom of the limiting ring and the inner side of the mounting port are fixedly connected with a pressure block, the outer side surface of the pressure block is set as a conical surface, and a top cover nut is threadedly connected on the threaded top head and above the limiting ring.

[0009] Preferably, the outer side of the umbrella-shaped tile is arranged as a conical surface, the inner side of the umbrella-shaped tile is arranged as a step portion, and an anti-slip portion is arranged on the outer side surface of the umbrella-shaped tile and close to the bottom of the umbrella-shaped tile.

[0010] Preferably, the mounting opening corresponds to a side surface of the pentagonal prism connector, and one end of the L-shaped sliding opening is located on the side surface of the pentagonal prism connector.

[0011] Preferably, a through hole is provided at the top of the upper block, and a side hole is provided on the side of the through hole. The card removal cylinder is located on the inner side of the through hole and slides in the upper and lower directions. An elastic band is fixedly connected to the top of the upper block, and the other end of the elastic band is fixedly connected to the side of the card removal cylinder after passing through the side hole.

[0012] Preferably, the card removal barrel comprises a barrel body, a top ring is fixedly connected to the top of the barrel body, and an elastic pad is fixedly connected to the bottom of the top ring.

[0013] Preferably, the middle block, the lower block and the upper block are an integrated structure.

[0014] Preferably, an elastic protective sleeve is provided on the outer side of the locking member.

[0015] Beneficial Effects The present invention provides a short-section hoisting tool with the following beneficial effects: 1. In the present invention, an undercut component is fixedly installed at the end of the U-shaped hook component. After the undercut component is inserted into the flange hole of the place-taking short section from below, the undercut component is tightly connected to the inner wall of the flange hole and cannot be overturned. When the undercut component is subjected to a back-off force (a force that causes the U-shaped hook component to withdraw from the flange hole), the radial extrusion force generated by the undercut component will increase with the increase of the back-off force, thereby ensuring the safety of the place-taking short section hoisting. A three-stage safety block is sleeved on the suspension rod. The three-stage safety block is located in the interval set between the upper limit nut and the lower cushion seat, which can limit the three-stage safety block from sliding up and down relative to the suspension rod, but the three-stage safety block The full block can rotate relative to the boom. In one case, the lower block is rotated to just above the flange hole of the placeholder short section, which can also limit the placeholder short section from being separated from the U-shaped hook assembly. In conjunction with the above-mentioned inverted buckle assembly, double safety assurance can be achieved. In one case, the upper block is rotated to just above the flange hole of the placeholder short section. At this time, the take-up cartridge is facing the flange hole of the placeholder short section. The construction personnel use a rubber hammer to hammer the take-up cartridge, move the take-up cartridge downward, insert it into the flange hole, and put it on the top of the inverted buckle assembly to shrink the inverted buckle assembly. At this time, the placeholder short section can be easily separated from the U-shaped hook assembly, which is relatively easy to use.

[0016] 2. The present invention adopts an interlocking clamp connection between the suspension rod and the U-shaped hook assembly, and utilizes a locking sleeve arranged on the outside of the connection, which can form a relatively strong connection method. In addition, the suspension rod and the U-shaped hook assembly are arranged separately, which can reduce the manufacturing difficulty of each component and facilitate the installation of the upper limit nut and the lower pad from the bottom of the suspension rod. This solution has a reasonable structural design, a simple manufacturing process, and a low production cost. It is also safe and simple and worthy of wide promotion and application.

[0017] 3. The present invention specifically designs an undercut assembly, whose main body includes a long screw, a limit shoulder, a neck, a pentagonal prism connector, and a threaded top from bottom to top. The undercut assembly is integrally processed by a lathe, an elastic ring is installed on the neck, and an umbrella-shaped tile is installed at the pentagonal prism connector. The elastic ring elastically supports the inner bottom position of the umbrella-shaped tile to make it present a conical structure. When the undercut assembly is inserted into the flange hole from bottom to top, the elastic ring provides a good clearance space. When the undercut assembly is subjected to a back-off force (a force that causes the U-shaped hook assembly to withdraw from the flange hole), a friction force is generated at the contact portion between the inner side wall of the flange hole and the umbrella-shaped tile, causing the umbrella-shaped tile to open outward, and the greater the outward opening force, the further the friction force between them increases, so that as the back thrust force received by the undercut assembly increases, the radial opening force of the umbrella-shaped tile increases, which can well prevent the undercut assembly from slipping out of the flange hole, especially when a hoisting accident occurs, the undercut assembly can respond quickly and lock the occupying short section, and no matter what position the occupying short section is in, it cannot be separated from the undercut assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a short-section hoisting tool in operation according to the present invention; Figure 2 A three-dimensional diagram of a space-occupying short section lifting tool proposed by the present invention; Figure 3 A front view of a space-occupying short section lifting tool proposed by the present invention; Figure 4 A top view of a space-occupying short section lifting tool proposed by the present invention; Figure 5 for Figure 4 Section view of the section line at CC; Figure 6 for Figure 5 A partial enlarged view of point B in the middle; Figure 7 This is an exploded view of a space-occupying short section lifting tool proposed by the present invention; Figure 8 This is a schematic diagram of the installation of a U-shaped hook assembly and an undercut assembly of a space-occupying short section lifting tool proposed by the present invention; Fig. 9 This is a disassembly schematic diagram of an undercut assembly of a space-occupying short section lifting tool proposed by the present invention; Fig.10 for Fig. 9 The partial enlarged view at D in the middle; Fig.11 It is a three-dimensional schematic diagram of an undercut group of a space-occupying short section lifting tool proposed by the present invention; Fig.12 for Fig.11 A partial enlarged view of point A in the middle.

[0019] Among them, 1. spacer; 2. lifting ring; 3. lifting rod; 4. threaded part; 5. bottom connection part; 6. U-shaped hook assembly; 61. horizontal part; 62. first vertical part; 63. top connection part; 64. second vertical part; 65. threaded hole; 7. undercut assembly; 71. long screw; 72. limit shoulder; 73. elastic ring; 74. neck; 75. pentagonal prism connector; 76. threaded top head; 77. installation port; 78. L-shaped sliding port; 79. limit ring; 710. pressure block; 711 , top cover nut; 712, umbrella-shaped tile; 713, anti-slip part; 714, connecting ear; 715, shaft body; 8, locking piece; 81, first half ring body; 82, second half ring body; 83, screw; 9, lower cushion seat; 10, upper limit nut; 11, three-stage safety block; 111, middle block; 112, lower block; 113, upper block; 12, through hole; 121, side hole; 13, cartridge; 131, cylinder body; 132, top ring; 133, elastic pad; 14, elastic band. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: like Figure 1-Figure 12 As shown, an embodiment of the present invention provides a short-section lifting tool, including a lifting rod 3, a lifting ring 2 is fixedly connected to the top of the lifting rod 3, a U-shaped hook assembly 6 is fixedly connected to the bottom end of the lifting rod 3 through a locking member 8, and a buckle assembly 7 is fixedly installed at one end of the U-shaped hook assembly 6 away from the lifting rod 3.

[0022] In a specific usage, reference Figure 1 , use two placeholder short section lifting tools to lift a placeholder short section, a plurality of flange threaded holes distributed in an annular manner are opened on the flange of the placeholder short section, and the two placeholder short section lifting tools correspond to two flange threaded holes exceeding the diameter of the placeholder short section flange.

[0023] During use, one end of the U-shaped hook assembly 6 with the undercut assembly 7 is inserted from below into the flange threaded hole of the occupying short section. During insertion, the undercut assembly 7 is compressed and can enter smoothly. After being inserted into place, the undercut assembly 7 forms an undercut structure with the inner wall of the flange threaded hole.

[0024] Specifically, the undercut assembly 7 includes a long screw rod 71, the bottom end of the long screw rod 71 is threadedly connected to the threaded hole 65, so as to realize the fixed installation of the undercut assembly 7 and the U-shaped hook assembly 6, the top of the long screw rod 71 is fixedly connected to the limiting shoulder 72, and the side of the limiting shoulder 72 is provided with an insertion eye, which is convenient for using a special tool (a C-shaped wrench with a protruding head) to be inserted into the insertion eye to operate the limiting shoulder 72 to rotate, the top of the limiting shoulder 72 is fixedly connected to the neck 74, the outer side of the neck 74 is provided with an elastic ring 73, the elastic ring 73 is preferably a C-shaped structure, so as to facilitate installation, the elastic ring 73 is preferably made of high-strength rubber, the top of the neck 74 is fixedly connected to the pentagonal prism connector 75, the top of the pentagonal prism connector 75 is provided with five annularly distributed installation ports 77, the inner side of each installation port 77 is provided with an L-shaped sliding port 78, and the top center position of the pentagonal prism connector 75 is fixedly connected to a threaded top head 76, The long screw 71, the limiting shoulder 72, the neck 74, the pentagonal prism connector 75, and the threaded top 76 are integrally processed by a lathe, and the production cost is low, the structural strength is high, and it is safe and reliable.

[0025] A connecting ear 714 is provided in the installation opening 77 , a shaft 715 is fixedly connected to the side of the connecting ear 714 and located inside the L-shaped sliding opening 78 , an umbrella-shaped washer 712 is fixedly connected to the outside of the connecting ear 714 , and the elastic ring 73 is located inside the umbrella-shaped washer 712 .

[0026] The connecting ear 714, the shaft body 715, and the umbrella-shaped washer 712 are integrally cast, wherein the shaft body 715 is turned, and its overall structural strength is also relatively high. Each inverted buckle assembly 7 requires the use of five umbrella-shaped washers 712. The mounting opening 77 corresponds to the side of the pentagonal prism connector 75. One end of the L-shaped slide 78 is located on the side of the pentagonal prism connector 75, that is, one end of the L-shaped slide 78 is open. Align the shaft body 715 with the opening of the L-shaped slide 78, and then slide inward to the depth of the mounting opening 77.

[0027] A limiting ring 79 is sleeved on the threaded top head 76, and a pressure block 710 is fixedly connected to the bottom of the limiting ring 79 and located inside the mounting opening 77. The outer side surface of the pressure block 710 is set as a conical surface, and a top cover nut 711 is threadedly connected to the threaded top head 76 and located above the limiting ring 79.

[0028] Finally, the limiting ring 79 is installed so that the limiting ring 79 at the bottom is inserted into the inner side of the installation opening 77 to limit the position of the shaft 715 so that it cannot slide in the L-shaped sliding opening 78. Finally, the top cover nut 711 is threadedly installed to complete the assembly of the undercut assembly 7.

[0029] In one embodiment, the outer side of the umbrella-shaped tile 712 is set as a conical surface to facilitate its insertion into the threaded hole of the occupying short section. The inner side of the umbrella-shaped tile 712 is set as a step portion, which corresponds to the elastic ring 73. The outer side surface of the umbrella-shaped tile 712 and near the bottom of the umbrella-shaped tile 712 are provided with an anti-slip portion 713 to play an anti-slip role.

[0030] The specific principle is as follows: the undercut component 7 is inserted into the threaded hole of the occupying short section, and the umbrella-shaped tile 712 is squeezed by the threaded hole of the occupying short section, and then the elastic ring 73 is squeezed. The elastic ring 73 will deform and shrink. At this time, the umbrella-shaped tile 712 can move and rotate, so that the outer diameter of the annular structure composed of five umbrella-shaped tiles 712 is reduced, and it can smoothly enter the predetermined position; when the undercut component 7 is subjected to the back-moving force (the force that causes the U-shaped hook component to withdraw from the flange hole), the inner wall of the flange hole contacts the umbrella-shaped tile 712 The friction force is generated at the position of the umbrella-shaped washer 712, so that the umbrella-shaped washer 712 opens outward, and the greater the outward opening force is, the greater the friction force at the contact position between the inner wall of the flange hole and the umbrella-shaped washer 712 is. As a result, as the reverse thrust applied to the inverted assembly increases, the radial opening force of the umbrella-shaped washer increases, which can effectively prevent the inverted assembly 7 from slipping out of the flange hole. Especially when a lifting accident occurs, the inverted assembly can respond quickly and lock the occupying short section. No matter what position the occupying short section is in, it cannot be separated from the inverted assembly.

[0031] In one embodiment, a threaded portion 4 is provided in the middle section of the suspension rod 3, an upper limit nut 10 is threadedly connected to the threaded portion 4, a lower cushion 9 is sleeved on the suspension rod 3 and located above the locking member 8, the upper limit nut 10 is located above the lower cushion 9, and a gap is provided between the upper limit nut 10 and the lower cushion 9, and a three-stage safety stopper 11 is sleeved on the suspension rod 3 and located at the gap between the upper limit nut 10 and the lower cushion 9.

[0032] The suspension rod 3 and the U-shaped hook assembly 6 are connected by interlocking clamps, and the locking piece 8 is sleeved on the outside of the connection, so that a relatively strong connection can be formed. In addition, the suspension rod 3 and the U-shaped hook assembly 6 are arranged separately, which can reduce the manufacturing difficulty of each component and facilitate the installation of the upper limit nut 10 and the lower pad 9 from the bottom of the suspension rod 3. This scheme has reasonable structural design, simple manufacturing process, low production cost, and is safe and simple, and is worthy of wide promotion and application.

[0033] Specifically, the three-section safety block 11 includes a middle block 111, one side of the middle block 111 is fixedly connected to the lower block 112 through a downward transition bending portion, the side of the middle block 111 away from the lower block 112 is fixedly connected to the upper block 113 through an upward transition bending portion, and the upper block 113 is slidably connected to a vertically arranged card removal cylinder 13, which corresponds to the inverted buckle assembly 7. The middle block 111, the lower block 112, and the upper block 113 are an integrated structure, which is manufactured using a bending molding process and also has good structural strength.

[0034] In one case, the lower block 112 is rotated to the position just above the flange hole of the place-taking short section, which can limit the place-taking short section from being separated from the U-shaped hook assembly 6. In conjunction with the above-mentioned inverted buckle assembly 7, double safety assurance can be achieved. In one case, the upper block 113 is rotated to the position just above the flange hole of the place-taking short section. At this time, the take-out clamp 13 is facing the flange hole of the place-taking short section. The construction personnel use a rubber hammer to hammer the take-out clamp 13, move the take-out clamp 13 downward, insert it into the flange hole, and put it on the top of the inverted buckle assembly 7 to shrink the inverted buckle assembly 7. At this time, the place-taking short section can be easily separated from the U-shaped hook assembly 6, which is relatively easy to use.

[0035] In one embodiment, a through hole 12 is provided at the top of the upper block 113, and a side hole 121 is provided at the side of the through hole 12. The cartridge 13 is located inside the through hole 12 and slides in the upper and lower directions. An elastic band 14 is fixedly connected to the top of the upper block 113, and the other end of the elastic band 14 passes through the side hole 121 and is fixedly connected to the side of the cartridge 13. The elastic band 14 keeps the cartridge 13 in the middle position at all times, and when it is hammered by a rubber hammer, it can slide downward. After the hammering is finished, the cartridge 13 can automatically return to its original position under the action of the elastic band 14. This structural design can facilitate operation and use.

[0036] The cartridge 13 includes a barrel 131, a top ring 132 is fixedly connected to the top of the barrel 131, and an elastic pad 133 is fixedly connected to the bottom of the top ring 132. The top ring 132 is used as the striking part of the rubber hammer, and it is not easy to deform. The elastic pad 133 plays a buffering role to prevent the top ring 132 from colliding with the upper block 113.

[0037] In one embodiment, a bottom connecting portion 5 is provided at the bottom end of the suspension rod 3, and the U-shaped hook assembly 6 includes a transverse portion 61, and the two ends of the transverse portion 61 are respectively fixedly connected with a first vertical portion 62 and a second vertical portion 64, and a top connecting portion 63 is provided on the side of the first vertical portion 62, and the top connecting portion 63 and the bottom connecting portion 5 are interlockingly connected, and a threaded hole 65 is provided at the top of the second vertical portion 64. The transverse portion 61, the first vertical portion 62, the second vertical portion 64 and the top connecting portion 63 are all integral structures, and the top connecting portion 63 and the bottom connecting portion 5 are interlockingly connected, so that the connection is more stable and can withstand greater tension.

[0038] In one embodiment, the locking member 8 includes a first half ring body 81 and a second half ring body 82, which are buckled on the outside of the top connecting portion 63 and the bottom connecting portion 5, and are fixedly connected by screws 83.

[0039] The first half ring body 81 and the second half ring body 82 are conveniently clamped on the outer sides of the top connecting part 63 and the bottom connecting part 5, and the screw 83 is convenient for connection.

[0040] In one embodiment, an elastic protective sleeve is provided on the outer side of the locking member 8 to prevent the locking member 8 from colliding with the outer side of the flange of the space-occupying short section.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A short-section hoisting tool, comprising a hoisting rod (3), the top of which is fixedly connected to a hoisting ring (2), characterized in that: The bottom end of the suspension rod (3) is fixedly connected to a U-shaped hook assembly (6) via a locking member (8); an undercut assembly (7) is fixedly mounted on one end of the U-shaped hook assembly (6) away from the suspension rod (3); The middle section of the suspension rod (3) is provided with a threaded portion (4), an upper limit nut (10) is threadedly connected to the threaded portion (4), a lower cushion seat (9) is sleeved on the suspension rod (3) and located above the locking member (8), the upper limit nut (10) is located above the lower cushion seat (9), and a gap is provided between the upper limit nut (10) and the lower cushion seat (9), and a three-stage safety block (11) is sleeved on the suspension rod (3) and located at the gap between the upper limit nut (10) and the lower cushion seat (9); The three-stage safety block (11) comprises a middle block (111), one side of the middle block (111) being fixedly connected to a lower block (112) via a bending portion that transitions downward, and the side of the middle block (111) away from the lower block (112) being fixedly connected to an upper block (113) via a bending portion that transitions upward, and a vertically arranged card removal cylinder (13) being slidably connected to the upper block (113), and the card removal cylinder (13) corresponds to the undercut assembly (7).

2. A space-occupying short section lifting tool according to claim 1, characterized in that: The bottom end of the suspension rod (3) is provided with a bottom connection portion (5), and the U-shaped hook assembly (6) includes a transverse portion (61), and the two ends of the transverse portion (61) are respectively fixedly connected to a first vertical portion (62) and a second vertical portion (64), and a top connection portion (63) is provided on the side of the first vertical portion (62), and the top connection portion (63) and the bottom connection portion (5) are interlockingly connected, and a threaded hole (65) is provided at the top of the second vertical portion (64).

3. A space-occupying short section lifting tool according to claim 2, characterized in that: The locking member (8) comprises a first semi-ring body (81) and a second semi-ring body (82), wherein the first semi-ring body (81) and the second semi-ring body (82) are buckled on the outside of the top connecting portion (63) and the bottom connecting portion (5), and the first semi-ring body (81) and the second semi-ring body (82) are fixedly connected by screws (83).

4. A space-occupying short section lifting tool according to claim 2, characterized in that: The undercut assembly (7) comprises a long screw rod (71), the bottom end of the long screw rod (71) being threadedly connected to the threaded hole (65), the top end of the long screw rod (71) being fixedly connected to a limit shoulder (72), the side of the limit shoulder (72) being provided with an insertion eye, the top of the limit shoulder (72) being fixedly connected to a neck (74), the outer side of the neck (74) being sleeved with an elastic ring (73), the top of the neck (74) being fixedly connected to a pentagonal prism connector (75), the top of the pentagonal prism connector (75) being provided with five annularly distributed mounting openings (77), the inner side of each mounting opening (77) being provided with an L-shaped sliding opening (78), the top center position of the pentagonal prism connector (75) being provided with a plurality of mounting openings (77) arranged in a circular pattern, A threaded top head (76) is fixedly connected thereto, a connecting ear (714) is arranged in the installation opening (77), a shaft (715) is fixedly connected to the side of the connecting ear (714) and located inside the L-shaped sliding opening (78), an umbrella-shaped shoe (712) is fixedly connected to the outside of the connecting ear (714), the elastic ring (73) is located inside the umbrella-shaped shoe (712), a limiting ring (79) is sleeved on the threaded top head (76), a pressure block (710) is fixedly connected to the bottom of the limiting ring (79) and located inside the installation opening (77), the outer side surface of the pressure block (710) is arranged as a conical surface, and a top cover nut (711) is threadedly connected to the threaded top head (76) and located above the limiting ring (79).

5. A space-occupying short section lifting tool according to claim 4, characterized in that: The outer side of the umbrella-shaped tile (712) is arranged as a conical surface, the inner side of the umbrella-shaped tile (712) is arranged as a step portion, and an anti-slip portion (713) is arranged on the outer side surface of the umbrella-shaped tile (712) and close to the bottom of the umbrella-shaped tile (712).

6. A space-occupying short section lifting tool according to claim 4, characterized in that: The installation opening (77) corresponds to the side surface of the pentagonal prism connector (75), and one end of the L-shaped sliding opening (78) is located on the side surface of the pentagonal prism connector (75).

7. A space-occupying short section lifting tool according to claim 1, characterized in that: A through hole (12) is provided at the top of the upper block (113), and a side hole (121) is provided on the side of the through hole (12). The cartridge (13) is located inside the through hole (12) and slides in the upper and lower directions. An elastic band (14) is fixedly connected to the top of the upper block (113), and the other end of the elastic band (14) passes through the side hole (121) and is fixedly connected to the side of the cartridge (13).

8. A space-occupying short section lifting tool according to claim 7, characterized in that: The card removal barrel (13) comprises a barrel body (131), a top ring (132) is fixedly connected to the top of the barrel body (131), and an elastic pad (133) is fixedly connected to the bottom of the top ring (132).

9. A space-occupying short section lifting tool according to claim 1, characterized in that: The middle block (111), the lower block (112), and the upper block (113) are an integrated structure.

10. A space-occupying short section lifting tool according to claim 1, characterized in that: An elastic protective sleeve is arranged on the outer side of the locking piece (8).

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