Underground power transmission cable laying device

Abstract

The invention discloses a laying device for an underground power transmission cable, and belongs to the technical field of electric power engineering, and the laying device comprises a base, universal wheels are arranged at the corners of the lower end of the base, a push rod is installed at the lower end of the side edge of the base, and a push handle is arranged at the other end of the push rod; a second vertical plate is arranged at the upper end of the base, a first vertical plate is arranged at the position, close to the second vertical plate, of the upper end of the base, a cable jacking mechanism is arranged in the second vertical plate and the first vertical plate, and a cable body is arranged above the cable jacking mechanism. According to the cable lifting device, the cable is arranged and jacked to the top of the underground electric well so that the cable can be conveniently laid and fixed to the top of the underground electric well subsequently, meanwhile, through arrangement of the transmission assembly, the first motor can drive the first lifting plate and the second lifting plate to synchronously ascend and descend, and therefore subsequent cable fixing operation can be conveniently carried out.

Description

Technical Field

[0001] The invention relates to the technical field of electric power engineering, and in particular to a laying device for underground power transmission cables. Background Art

[0002] Underground cables refer to cables that are often buried underground compared to common overhead lines, so they are also called underground cables. Cables are made of one or more mutually insulated conductors wrapped with insulation and protective layers, and are used to transmit electricity or information from one place to another. After entering modern society, due to the shortage of urban land, heavy traffic pressure, and urban appearance construction, large cities generally adopt underground cable transmission. Compared with overhead lines, underground cables have the advantages of small footprint, reliable power transmission, and strong anti-interference ability.

[0003] Currently, there is a laying device specifically for underground cables, but it can only lift the cables, and cannot simultaneously lift and lower the structure used to fix the cables, which is relatively inconvenient to operate; the cables it sets are not convenient to fix after laying, and after the cables reach the top of the underground electric well, they cannot be fixed immediately, affecting the laying effect of the cables. Summary of the invention

[0004] The object of the present invention is to provide a laying device for underground power transmission cables which is convenient for controlling the synchronous lifting and lowering of a cable limiting structure and a cable fixing structure and convenient for fixing the cable on the top of an underground power well.

[0005] The present invention is achieved through the following technical scheme: a laying device for underground power transmission cables, including a base, a universal wheel is arranged at the lower corner of the base, a push rod is installed at the lower end of the side of the base, and a push handle is arranged at the other end of the push rod, a second vertical plate is installed on one side of the upper end of the base, a first vertical plate is arranged at the upper end of the base near the second vertical plate, a cable jacking mechanism is arranged inside the second vertical plate and the first vertical plate, a cable body is arranged above the cable jacking mechanism, and a cable fixing mechanism is arranged inside the other side of the base.

[0006] In order to better realize the present invention, further, the cable jacking mechanism includes a first lifting plate, a transmission assembly, a through groove, a rotating shaft, a second lifting plate, an upper limit seat, bolts and a lower limit seat. The first lifting plate is arranged inside the first vertical plate, the second lifting plate is arranged inside the second vertical plate, the upper end of the second lifting plate is arranged with a lower limit seat, the upper end of the lower limit seat is arranged with an upper limit seat, one side of the upper limit seat is rotatably connected to the lower limit seat by a rotating shaft, the other side of the upper limit seat is fixedly connected to the lower limit seat by bolts, an arc groove is provided at the upper end of the lower limit seat and the lower end of the upper limit seat, the transmission assembly is arranged inside the first vertical plate and the second vertical plate, and the sides of the first vertical plate and the second vertical plate are provided with through grooves corresponding to the transmission assembly.

[0007] In order to better implement the present invention, further, the cable lifting mechanism also includes a slider and a slide groove, the inner walls of the first lifting plate and the second lifting plate are provided with a slide groove, and the inner walls of the first vertical plate and the second vertical plate are installed with sliders corresponding to the slide groove.

[0008] In order to better realize the present invention, further, the transmission assembly includes a first screw, a first transmission roller, a flexible toothed belt, a first motor, a second transmission roller, a third transmission roller and a second screw. The first motor is installed at the upper edge of the base, and the second transmission roller is provided at the output end of the first motor. A flexible toothed belt is wound around the surface of the second transmission roller, and one end of the flexible toothed belt is internally meshed and connected with the first transmission roller, the first transmission roller is fixed with the first screw through its interior, and a screw hole corresponding to the first screw is opened in the interior of the first lifting plate, and the other end of the flexible toothed belt is meshed and connected with the third transmission roller on the inner surface, the third transmission roller is fixed with the second screw through its interior, and the second lifting plate is provided with a screw hole corresponding to the second screw.

[0009] In order to better realize the present invention, further, the cable fixing mechanism includes a second motor, a mounting plate, a threaded rod, a first connecting block, a placement plate, a receiving groove, a second connecting block, a sliding rod and a cable fixing assembly. A receiving groove is opened inside the other side of the base, a mounting plate is fixed at the side edge of the base, a second motor is arranged at the upper end of a group of mounting plates, a threaded rod is arranged at the output end of the second motor, the surface of the threaded rod is threadedly connected with the first connecting block, a placement plate is installed on the side of the first connecting block, a second connecting block is fixed on the other side of the placement plate, a sliding rod slidably connected to the second connecting block is installed inside another group of mounting plates, and a cable fixing assembly is arranged at the upper end of the first lifting plate.

[0010] In order to better realize the present invention, further, the cable fixing assembly includes a telescopic rod, a hydraulic cylinder, a top block, a placement groove, a clamp and an anchor rod. The hydraulic cylinder is installed at the center position of the upper end of the first lifting plate, and the telescopic rod is installed on the upper side of the first lifting plate. The upper ends of the telescopic rod and the hydraulic cylinder are provided with a top block, and the upper end of the top block is provided with a clamp. The upper end of the top block is provided with a placement groove corresponding to the clamp, and the upper end side of the clamp is provided with an anchor rod.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention can conveniently limit the position of the cable by setting a cable lifting mechanism, and lift it to the top of the underground electrical well, so as to facilitate the subsequent laying and fixing of the cable on the top of the underground electrical well. At the same time, through the setting of the transmission component, the first motor can drive the first lifting plate and the second lifting plate to rise and fall synchronously, so as to facilitate the subsequent cable fixing operation; (2) The present invention can conveniently fix the cable lifted to the top of the underground electric well by setting a cable fixing mechanism, and can store the clamp in the receiving groove at the same time. The second motor can control the placement plate to rise and fall, so as to facilitate the removal of the clamp and place it in the placement groove for subsequent cable fixing work; (3) The present invention has a reasonable structure and complete functions. It is convenient to control the synchronous lifting and lowering of the cable limiting structure and the cable fixing structure and to fix the cable on the top of the underground electric well. It can improve the installation efficiency and accuracy of underground cables and is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the cable limiting assembly in the present invention; Figure 3 It is a structural schematic diagram of the cable lifting mechanism in the present invention; Figure 4 It is a structural schematic diagram of the transmission assembly in the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the cable fixing mechanism in the present invention.

[0013] Among them: 1-base, 2-universal wheel, 3-push rod, 4-push handle, 5-cable fixing mechanism, 51-second motor, 52-mounting plate, 53-threaded rod, 54-first connecting block, 55-placement plate, 56-accommodation groove, 57-second connecting block, 58-sliding rod, 59-cable fixing assembly, 591-telescopic rod, 592-hydraulic cylinder, 593-top block, 594-placement groove, 595-clamp, 596-anchor rod, 6-first vertical plate, 7-cable body Body, 8—cable lifting mechanism, 81—first lifting plate, 82—transmission assembly, 821—first screw, 822—first transmission roller, 823—flexible toothed belt, 824—first motor, 825—second transmission roller, 826—third transmission roller, 827—second screw, 83—through groove, 84—slider, 85—slide groove, 86—rotating shaft, 87—second lifting plate, 88—upper limit seat, 89—bolt, 810—lower limit seat, 9—second vertical plate. DETAILED DESCRIPTION

[0014] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, it is limited that "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly including one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] Embodiment 1: The main structure of this embodiment is as follows: Figure 1 , Figure 2 , Figure 5 As shown, it includes a base 1, a universal wheel 2 is arranged at the lower corner of the base 1, a push rod 3 is installed at the lower end of the side of the base 1, and a push handle 4 is arranged at the other end of the push rod 3, a second vertical plate 9 is installed on one side of the upper end of the base 1, a first vertical plate 6 is arranged at the upper end of the base 1 near the second vertical plate 9, a cable jacking mechanism 8 is arranged inside the second vertical plate 9 and the first vertical plate 6, a cable body 7 is arranged above the cable jacking mechanism 8, and a cable fixing mechanism 5 is arranged inside the other side of the base 1.

[0018] The specific use process is that when the cable body 7 is laid, the cable is limited by the cable lifting mechanism 8 and lifted to the top of the underground electric well, and then the cable fixing mechanism 5 fixes the cable body 7 lifted to the top of the underground electric well.

[0019] First, loosen the bolt 89 and place the cable body 7 in the arc groove at the upper end of the lower limit seat 810. Then, drive the upper limit seat 88 to close through the rotating shaft 86 and fix it through the bolt 89. Turn on the first motor 824. The first motor 824 drives the second transmission roller 825 to rotate through the output end. The rotation of the second transmission roller 825 drives the flexible toothed belt 823 to rotate. The rotation of the flexible toothed belt 823 drives the first transmission roller 822 and the third transmission roller 826 to rotate synchronously. The first transmission roller 822 and the third transmission roller 826 rotate synchronously, driving the first screw 821 and the second screw 827 to rotate synchronously, thereby driving the first lifting plate 81 and the second lifting plate 87 to rise synchronously, so that the cable body 7 rests on the top of the underground electric well, so that the cable body 7 can be laid and fixed later. When the first lifting plate 81 and the second lifting plate 87 are lifted and lowered, the slider 84 will be driven to slide inside the slide groove 85, thereby lifting The stability of the lifting process of the first lifting plate 81 and the second lifting plate 87 is improved; when the cable body 7 is fixed, the second motor 51 is turned on, and the second motor 51 drives the threaded rod 53 to rotate through the output end, and the threaded rod 53 rotates to drive the first connecting block 54 to rise, and the first connecting block 54 rises to drive the placement plate 55 to rise, and the placement plate 55 rises to drive the second connecting block 57 to slide on the surface of the slide bar 58, so that the clamp 595 at the upper end of the placement plate 55 can be pushed up to take out the clamp 595. At this time, the clamp 595 is placed in the placement groove 594, and when the cable body 7 is fixed, the hydraulic cylinder 592 is turned on, and the hydraulic cylinder 592 drives the top block 593 to rise. The rise of the top block 593 will also drive the telescopic rod 591 to extend until the top block 593 drives the clamp 595 to rest against the top of the underground electric well, until the anchor rod 596 on the side of the upper end of the clamp 595 is inserted into the soil, thereby realizing the fixation of the cable body 7.

[0020] Embodiment 2: Based on the above embodiment, this embodiment further defines the structure of the cable lifting mechanism 8, such as Figures 2~4As shown, the cable lifting mechanism 8 includes a first lifting plate 81, a transmission assembly 82, a through slot 83, a rotating shaft 86, a second lifting plate 87, an upper limit seat 88, a bolt 89 and a lower limit seat 810. The first lifting plate 81 is arranged inside the first vertical plate 6, and the second lifting plate 87 is arranged inside the second vertical plate 9. The lower limit seat 810 is arranged at the upper end of the second lifting plate 87, and the upper end of the lower limit seat 810 is arranged at the upper end of the upper limit seat 88. One side of the upper limit seat 88 is rotatably connected to the lower limit seat 810 through the rotating shaft 86, and the other side of the upper limit seat 88 is fixedly connected to the lower limit seat 810 through the bolt 89. An arc groove is provided at the upper end of the lower limit seat 810 and the lower end of the upper limit seat 88. The transmission assembly 82 is arranged inside the first vertical plate 6 and the second vertical plate 9, and the side edges of the first vertical plate 6 and the second vertical plate 9 are provided with a through slot 83 corresponding to the transmission assembly 82. By adopting the above technical solution, when laying the cable body 7, first loosen the bolt 89, place the cable body 7 in the arc groove at the upper end of the lower limit seat 810, and then drive the upper limit seat 88 to close through the rotating shaft 86, and fix it through the bolt 89, and then drive the first lifting plate 81 and the second lifting plate 87 to rise synchronously through the transmission assembly 82, so that the cable body 7 is against the top of the underground electric well, so as to subsequently lay and fix the cable body 7. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0021] Embodiment 3: Based on the above embodiment, this embodiment further defines the structure of the cable lifting mechanism 8, such as Figures 2~4 As shown, the cable lifting mechanism 8 further includes a slider 84 and a slide groove 85. The inner walls of the first lifting plate 81 and the second lifting plate 87 are provided with a slide groove 85, and the inner walls of the first vertical plate 6 and the second vertical plate 9 are provided with a slider 84 corresponding to the slide groove 85. By adopting the above technical solution, when the first lifting plate 81 and the second lifting plate 87 are lifted or lowered, the slider 84 will be driven to slide inside the slide groove 85, thereby improving the stability of the lifting process of the first lifting plate 81 and the second lifting plate 87. The other parts of this embodiment are the same as those of the above embodiment and will not be repeated.

[0022] Embodiment 4: Based on the above embodiment, this embodiment further defines the structure of the cable lifting mechanism 8, such as Figures 2~4As shown, the transmission assembly 82 includes a first screw 821, a first transmission roller 822, a flexible toothed belt 823, a first motor 824, a second transmission roller 825, a third transmission roller 826 and a second screw 827. The first motor 824 is installed at the upper edge of the base 1, and the second transmission roller 825 is provided at the output end of the first motor 824. The surface of the second transmission roller 825 is wound with a flexible toothed belt 823, and one end of the flexible toothed belt 823 is internally meshed with the first transmission roller 822, and the first screw 821 is fixedly penetrated inside the first transmission roller 822. A screw hole corresponding to the first screw 821 is provided inside the first lifting plate 81, and the inner surface of the other end of the flexible toothed belt 823 is meshed with the third transmission roller 826, and the second screw 827 is fixedly penetrated inside the third transmission roller 826, and the second lifting plate 87 is provided with a screw hole corresponding to the second screw 827. By adopting the above technical solution, the first motor 824 is turned on, and the first motor 824 drives the second transmission roller 825 to rotate through the output end, and the second transmission roller 825 rotates to drive the flexible toothed belt 823 to rotate, and the flexible toothed belt 823 rotates to drive the first transmission roller 822 and the third transmission roller 826 to rotate synchronously, and the first transmission roller 822 and the third transmission roller 826 rotate synchronously to drive the first screw 821 and the second screw 827 to rotate synchronously, so that the first lifting plate 81 and the second lifting plate 87 can be driven to rise synchronously. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0023] Embodiment 5: Based on the above embodiment, this embodiment further defines the structure of the cable fixing mechanism 5, such as Figure 5As shown, the cable fixing mechanism 5 includes a second motor 51, a mounting plate 52, a threaded rod 53, a first connecting block 54, a placement plate 55, a receiving groove 56, a second connecting block 57, a sliding rod 58 and a cable fixing assembly 59. A receiving groove 56 is provided inside the other side of the base 1, a mounting plate 52 is fixed at the side edge of the base 1, a second motor 51 is arranged at the upper end of one group of mounting plates 52, a threaded rod 53 is arranged at the output end of the second motor 51, the surface of the threaded rod 53 is threadedly connected with the first connecting block 54, a placement plate 55 is installed on the side of the first connecting block 54, and a second connecting block 57 is fixed on the other side of the placement plate 55, a sliding rod 58 slidably connected to the second connecting block 57 is installed inside another group of mounting plates 52, and a cable fixing assembly 59 is arranged at the upper end of the first lifting plate 81. By adopting the above technical solution, when the cable body 7 is fixed, the second motor 51 is turned on, and the second motor 51 drives the threaded rod 53 to rotate through the output end, and the threaded rod 53 rotates to drive the first connection block 54 to rise, and the first connection block 54 rises to drive the placement plate 55 to rise, and the placement plate 55 rises to drive the second connection block 57 to slide on the surface of the slide bar 58, so that the clamp 595 on the upper end of the placement plate 55 can be pushed up, so as to remove the clamp 595. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0024] Embodiment 6: Based on the above embodiment, this embodiment further defines the structure of the cable fixing assembly 59, such as Figure 5 As shown, the cable fixing assembly 59 includes a telescopic rod 591, a hydraulic cylinder 592, a top block 593, a placement groove 594, a clamp 595 and an anchor rod 596. The hydraulic cylinder 592 is installed at the center position of the upper end of the first lifting plate 81, and the telescopic rod 591 is installed on the upper side of the first lifting plate 81. The upper ends of the telescopic rod 591 and the hydraulic cylinder 592 are provided with a top block 593, and the upper end of the top block 593 is provided with a clamp 595. The upper end of the top block 593 is provided with a placement groove 594 corresponding to the clamp 595, and the upper end side of the clamp 595 is provided with an anchor rod 596. By adopting the above technical solution, the clamp 595 is placed in the placement groove 594, and when the cable body 7 is fixed, the hydraulic cylinder 592 is turned on, and the hydraulic cylinder 592 drives the top block 593 to rise, and the top block 593 rises and drives the telescopic rod 591 to extend, until the top block 593 drives the clamp 595 to abut against the top of the underground electric well, until the anchor rod 596 on the side of the upper end of the clamp 595 is inserted into the soil, thereby achieving the fixation of the cable body 7. The other parts of this embodiment are the same as the above embodiment and are not repeated here.

[0025] It can be understood that the structure of the laying device for underground power transmission cables according to an embodiment of the present invention, such as the working principles and working processes of components such as the universal wheel 2 and the push handle 4, are prior art and are well known to technicians in this field, and will not be described in detail here.

[0026] Although the 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 claims and their equivalents.

Claims

1. A laying device for underground power transmission cables, characterized in that: The utility model comprises a base (1), wherein a universal wheel (2) is arranged at a corner of the lower end of the base (1), a push rod (3) is installed at the lower end of the side of the base (1), and a push handle (4) is arranged at the other end of the push rod (3), a second vertical plate (9) is installed on one side of the upper end of the base (1), a first vertical plate (6) is arranged at a position of the upper end of the base (1) near the second vertical plate (9), a cable lifting mechanism (8) is arranged inside the second vertical plate (9) and the first vertical plate (6), a cable body (7) is arranged above the cable lifting mechanism (8), and a cable fixing mechanism (5) is arranged inside the other side of the base (1).

2. A laying device for underground power transmission cables according to claim 1, characterized in that: The cable lifting mechanism (8) comprises a first lifting plate (81), a transmission assembly (82), a through slot (83), a rotating shaft (86), a second lifting plate (87), an upper limit seat (88), a bolt (89) and a lower limit seat (810); the first lifting plate (81) is arranged inside the first vertical plate (6); the second lifting plate (87) is arranged inside the second vertical plate (9); the lower limit seat (810) is arranged at the upper end of the second lifting plate (87); the upper end of the lower limit seat (810) is arranged at the upper end of the ), one side of the upper limit seat (88) is rotatably connected to the lower limit seat (810) via a rotating shaft (86), the other side of the upper limit seat (88) is fixedly connected to the lower limit seat (810) via a bolt (89), an arc groove is provided at the upper end of the lower limit seat (810) and the lower end of the upper limit seat (88), a transmission assembly (82) is provided inside the first vertical plate (6) and the second vertical plate (9), and a through groove (83) corresponding to the transmission assembly (82) is provided on the side edges of the first vertical plate (6) and the second vertical plate (9).

3. A laying device for underground power transmission cables according to claim 2, characterized in that: The cable lifting mechanism (8) further comprises a slider (84) and a slide groove (85); the inner walls of the first lifting plate (81) and the second lifting plate (87) are provided with a slide groove (85); and the inner walls of the first vertical plate (6) and the second vertical plate (9) are provided with sliders (84) corresponding to the slide groove (85).

4. A laying device for underground power transmission cables according to claim 2, characterized in that: The transmission assembly (82) comprises a first screw (821), a first transmission roller (822), a flexible toothed belt (823), a first motor (824), a second transmission roller (825), a third transmission roller (826) and a second screw (827); the first motor (824) is mounted on the upper edge of the base (1); the second transmission roller (825) is disposed at the output end of the first motor (824); a flexible toothed belt (823) is wound around the surface of the second transmission roller (825); the flexible toothed belt (823) is wound around the surface of the second transmission roller (825); the flexible toothed belt (823) is wound around the second transmission roller (825); the third transmission roller (826 ... One end of the flexible toothed belt (823) is meshedly connected to a first transmission roller (822), a first screw rod (821) is fixedly passed through the interior of the first transmission roller (822), a screw hole corresponding to the first screw rod (821) is provided inside the first lifting plate (81), the other end of the flexible toothed belt (823) is meshedly connected to a third transmission roller (826) on the inner surface, a second screw rod (827) is fixedly passed through the interior of the third transmission roller (826), and a screw hole corresponding to the second screw rod (827) is provided inside the second lifting plate (87).

5. A laying device for underground power transmission cables according to claim 2, characterized in that: The cable fixing mechanism (5) comprises a second motor (51), a mounting plate (52), a threaded rod (53), a first connecting block (54), a placement plate (55), a receiving groove (56), a second connecting block (57), a sliding rod (58) and a cable fixing assembly (59). The other side of the base (1) is provided with a receiving groove (56), a mounting plate (52) is fixed at the side edge of the base (1), a second motor (51) is arranged at the upper end of one group of mounting plates (52), a threaded rod (53) is arranged at the output end of the second motor (51), a first connecting block (54) is threadedly connected to the surface of the threaded rod (53), a placement plate (55) is installed on the side of the first connecting block (54), a second connecting block (57) is fixed on the other side of the placement plate (55), a sliding rod (58) slidably connected to the second connecting block (57) is installed inside another group of mounting plates (52), and a cable fixing assembly (59) is arranged at the upper end of the first lifting plate (81).

6. A laying device for underground power transmission cables according to claim 5, characterized in that: The cable fixing assembly (59) comprises a telescopic rod (591), a hydraulic cylinder (592), a top block (593), a placement groove (594), a clamp (595) and an anchor rod (596); the hydraulic cylinder (592) is installed at the center of the upper end of the first lifting plate (81); the telescopic rod (591) is installed on the side of the upper end of the first lifting plate (81); the top block (593) is arranged at the upper ends of the telescopic rod (591) and the hydraulic cylinder (592); the clamp (595) is arranged inside the upper end of the top block (593); the top end of the top block (593) is provided with a placement groove (594) corresponding to the clamp (595); and the anchor rod (596) is arranged on the side of the upper end of the clamp (595).

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