High-strength split type grading ring

Abstract

The utility model discloses a high-strength split-type grading ring, and relates to the technical field of grading rings, the high-strength split-type grading ring comprises a top layer alloy steel grading ring, the top layer alloy steel grading ring is used for equally distributing pressure so as to reduce deformation and failure risks caused by pressure difference; the multiple connecting assemblies are distributed in a circumferential array mode, the multiple connecting assemblies are arranged on the outer side of the top-layer alloy steel grading ring in a surrounding mode, and the connecting assemblies are used for supporting and fixing the top-layer alloy steel grading ring; the mounting assembly is arranged at the bottom of the connecting assembly, and the mounting assembly is used for providing mounting and fixing for the connecting assembly; the utility model discloses not only can be convenient to install and dismantle, but also can be convenient to transport the equipment, thereby can prevent the bumping in the transportation, and then can improve the transportation safety.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure equalizing rings, in particular to a high-strength split type pressure equalizing ring. Background Art

[0002] The grading ring is a ring-shaped hardware that improves the voltage distribution of the insulator string. The function of the grading ring is to prevent side lightning strikes. It is suitable for AC voltage and can evenly distribute the high voltage around the object to ensure that there is no potential difference between the various parts of the ring, thereby achieving the effect of voltage grading. According to different uses, the grading ring can be divided into lightning arrester grading ring, lightning protection grading ring, insulator grading ring, transformer grading ring, high-voltage test equipment grading ring, transmission and transformation line grading ring, etc. According to different materials, the grading ring can be divided into aluminum grading ring, stainless steel grading ring, iron grading ring, etc.

[0003] Most of the existing equalizing rings and equalizing rods are welded, which is not convenient for transportation. It is inevitable that bumps will occur during transportation, which will cause damage to the equalizing ring, thereby greatly reducing work safety. Therefore, we propose a high-strength split equalizing ring to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a high-strength split-type pressure equalizing ring, which solves the problem of inconvenient transportation and inevitable bumps during transportation.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-strength split pressure equalizing ring, comprising:

[0006] A top alloy steel pressure equalizing ring, which is used to equally distribute the pressure to reduce the risk of deformation and failure caused by pressure differences;

[0007] A connecting assembly, wherein a plurality of the connecting assemblies are provided, and the plurality of connecting assemblies are distributed in a circumferential array manner, and the plurality of connecting assemblies are arranged on the outside of the top alloy steel equalizing pressure ring, and the connecting assembly is used to support and fix the top alloy steel equalizing pressure ring;

[0008] An installation component, which is disposed at the bottom of the connecting component and is used to provide installation and fixation for the connecting component; and

[0009] A limiting component, wherein two limiting components are provided, and the two limiting components are respectively provided on the top side and the bottom side of the installation component, and the limiting component is used to limit the installation component.

[0010] Preferably, the installation assembly includes a first alloy steel C-shaped frame, a second alloy steel C-shaped frame is symmetrically arranged at the first alloy steel C-shaped frame, a limiting groove is provided at the intersection of the first alloy steel C-shaped frame and the second alloy steel C-shaped frame, and the two opposing limiting grooves are plug-connected to the limiting assembly.

[0011] Preferably, the first alloy steel C-shaped frame and the second alloy steel C-shaped frame are cross-distributed.

[0012] Preferably, both end surfaces of the first alloy steel C-shaped frame are provided with special-shaped grooves, and both end surfaces of the second alloy steel C-shaped frame are fixedly provided with special-shaped blocks, and the two special-shaped blocks are respectively inserted into the inner cavities of the two special-shaped grooves.

[0013] Preferably, the limiting assembly comprises a limiting block, the limiting block is arranged in the inner cavity of the limiting groove, a clamping plate is arranged at the center position on both sides of the limiting block, and a clamping groove for clamping the clamping plate is opened at the center position on both sides of the limiting groove.

[0014] Preferably, a spring pin is embedded and connected at the center position of the top surface of the two engaging plates, and a pin hole for limiting the output end of the spring pin is opened at the center position of the top surface of the inner cavity of each engaging groove.

[0015] Preferably, the connection assembly comprises an alloy steel uniform inclined rod, a first U-shaped frame is arranged at one end of the alloy steel uniform inclined rod, a first locking internal threaded hole is opened at a center position near the opening end on the top surface of the first U-shaped frame, the first locking internal threaded hole passes through the bottom surface of the second alloy steel C-shaped frame, and a first locking bolt is rotatably connected to the inner cavity of the first locking internal threaded hole;

[0016] A second U-shaped frame is provided at the other end of the alloy steel uniform inclined rod, and a second locking internal threaded hole is provided on the top surface of the second U-shaped frame and at a center position close to the open end. The second locking internal threaded hole passes through the bottom surface of the second U-shaped frame, and a second locking bolt is rotatably connected to the inner cavity of the second locking internal threaded hole.

[0017] Beneficial Effects

[0018] The utility model provides a high-strength split pressure equalizing ring. Compared with the prior art, it has the following advantages:

[0019] Beneficial effects:

[0020] The high-strength split pressure-equalizing ring, when it is necessary to install the high-strength split pressure-equalizing ring, first place the installation component at a preset position, and then respectively insert the two limit components on the top side and the bottom side of the installation component, so that the two limit components can limit and fix the installation component. Since a top-layer alloy steel pressure-equalizing ring is fixedly connected to the top of the installation component, and a plurality of connecting components are arranged around the outer side of the top-layer alloy steel pressure-equalizing ring, and the bottom surfaces of the plurality of connecting components are respectively arranged around the outer side of the installation component, the plurality of connecting components can provide support and fixation for the installation component and the top-layer alloy steel pressure-equalizing ring, so that the equipment can be formed into a whole, so that the equipment can reduce the risk of deformation and failure caused by pressure difference. When the equipment needs to be disassembled, the staff can remove it from the installation component and the top-layer alloy steel pressure-equalizing ring through the plurality of connecting components, so that the equipment can be split, so that it is convenient for the staff to transport it, so as to improve the convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall explosion structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the installation assembly structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the limit assembly of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the connection component of the utility model.

[0026] In the figure: 1. Installation assembly; 11. First alloy steel C-shaped frame; 12. Second alloy steel C-shaped frame; 13. Limiting groove; 14. Special-shaped groove; 15. Special-shaped block; 16. Engaging groove; 2. Limiting assembly; 21. Limiting block; 22. Engaging plate; 23. Spring pin; 3. Connecting assembly; 31. Uniform inclined rod; 32. First U-shaped frame; 33. First locking internal threaded hole; 34. First locking bolt; 35. Second U-shaped frame; 36. Second locking internal threaded hole; 37. Second locking bolt; 4. Top alloy steel equalizing ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 The utility model provides a technical solution: a high-strength split-type equalizing pressure ring, a top alloy steel equalizing pressure ring 4, the top alloy steel equalizing pressure ring 4 is used to equally distribute pressure to reduce the risk of deformation and failure caused by pressure differences; a connecting component 3, a plurality of connecting components 3 are arranged, and the plurality of connecting components 3 are distributed in a circular array, and the plurality of connecting components 3 are arranged on the outside of the top alloy steel equalizing pressure ring 4, and the connecting component 3 is used to support and fix the top alloy steel equalizing pressure ring 4; an installation component 1, the installation component 1 is arranged at the bottom of the connection component 3, and the installation component 1 is used to provide installation and fixation for the connection component 3; and a limiting component 2, two limiting components 2 are arranged, and the two limiting components 2 are respectively arranged on the top side and the bottom side of the installation component 1, and the limiting component 2 is used to limit the installation component 1;

[0029] When it is necessary to install the high-strength split-type equalizing pressure ring, first place the installation component 1 at the preset position, and then respectively insert the two limit components 2 into the top side and the bottom side of the installation component 1, so that the two limit components 2 can limit and fix the installation component 1. Since the top of the installation component 1 is fixedly connected to the top of the top alloy steel equalizing pressure ring 4, and a plurality of connecting components 3 are arranged around the outer side of the top alloy steel equalizing pressure ring 4, and the bottom surfaces of the plurality of connecting components 3 are respectively arranged around the outer side of the installation component 1, the plurality of connecting components 3 can provide support and fixation for the installation component 1 and the top alloy steel equalizing pressure ring 4, so that the equipment can be formed into a whole, so that the equipment can reduce the deformation and failure risks caused by pressure differences. When the equipment needs to be disassembled, the staff can remove it from the installation component 1 and the top alloy steel equalizing pressure ring 4 through the plurality of connecting components 3, so that the equipment can be split, so that it is convenient for the staff to transport it, so as to improve the convenience.

[0030] See also Figure 1 , Figure 2 , Figure 3 The installation component 1 includes a first alloy steel C-shaped frame 11, a second alloy steel C-shaped frame 12 is symmetrically arranged at the first alloy steel C-shaped frame 11, a limiting groove 13 is provided at the intersection of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, two opposing limiting grooves 13 are plugged and connected with the limiting component 2, the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 are cross-distributed, both end surfaces of the first alloy steel C-shaped frame 11 are provided with special-shaped grooves 14, both end surfaces of the second alloy steel C-shaped frame 12 are fixedly provided with special-shaped blocks 15, and the two special-shaped blocks 15 are respectively plugged into the inner cavities of the two special-shaped grooves 14;

[0031] The first alloy steel C-shaped frame 11 in the installation component 1 can be installed in a preset position and provide an installation foundation for the second alloy steel C-shaped frame 12. Since a limiting groove 13 is provided at the intersection of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, and special-shaped grooves 14 are provided on both end surfaces of the first alloy steel C-shaped frame 11, special-shaped blocks 15 are fixedly provided on both end surfaces of the second alloy steel C-shaped frame 12, and the two special-shaped blocks 15 are respectively inserted into the inner cavities of the two special-shaped grooves 14, so that the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 can be plugged and connected, and then the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 can be made into a whole. Since the two opposing limiting grooves 13 are plugged and connected with the limiting component 2, the limiting component 2 can perform secondary fixation on the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, so as to improve the stability of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12.

[0032] See also Figure 1 , Figure 2 , Figure 4 The limiting assembly 2 includes a limiting block 21, which is arranged in the inner cavity of the limiting groove 13. A clamping plate 22 is arranged at the center of both sides of the limiting block 21. A clamping groove 16 for clamping the clamping plate 22 is opened at the center of both sides of the limiting groove 13. A spring pin 23 is embedded and connected at the center of the top surface of the two clamping plates 22. A pin hole for the output end of the limiting spring pin 23 is opened at the center of the top surface of each inner cavity of the clamping groove 16;

[0033] The limit block 21 in the limit assembly 2 can be inserted into the inner cavity of the limit groove 13, and the installation foundation of the two clamping plates 22 can be improved. Since the clamping grooves 16 for the clamping plates 22 are opened at the center positions on both sides of the limit groove 13, the two clamping plates 22 can be inserted into the inner cavities of the two clamping grooves 16, and then the two clamping plates 22 can connect and fix the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, so as to improve stability. Since the spring pin 23 is embedded and connected at the center position of the top surface of the two clamping plates 22, a pin hole for the output end of the limiting spring pin 23 is opened at the center position of the top surface of each inner cavity of the clamping groove 16, so that the output end of the spring pin 23 can be inserted into the inner cavity of the pin hole, and then the clamping plate 22 can be prevented from falling off from the inner cavity of the clamping groove 16, so as to prevent the limit block 21 from falling off from the inner cavity of the limit groove 13.

[0034] See also Figure 1 , Figure 2 , Figure 5The connection assembly 3 includes an alloy steel uniform inclined rod 31, a first U-shaped frame 32 is provided at one end of the alloy steel uniform inclined rod 31, a first locking internal threaded hole 33 is provided on the top surface of the first U-shaped frame 32 and in the center near the opening end, the first locking internal threaded hole 33 penetrates the bottom surface of the second alloy steel C-shaped frame 12, and a first locking bolt 34 is rotatably connected to the inner cavity of the first locking internal threaded hole 33; a second U-shaped frame 35 is provided at the other end of the alloy steel uniform inclined rod 31, a second locking internal threaded hole 36 is provided on the top surface of the second U-shaped frame 35 and in the center near the opening end, the second locking internal threaded hole 36 penetrates the bottom surface of the second U-shaped frame 35, and a second locking bolt 37 is rotatably connected to the inner cavity of the second locking internal threaded hole 36;

[0035] The alloy steel uniform inclined rod 31 in the connecting component 3 can provide an installation foundation for the first U-shaped frame 32, so that the bottom surface and top surface of the inner cavity of the first U-shaped frame 32 can be respectively engaged with the bottom surface and top surface of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, so that the first U-shaped frame 32 can provide support for the alloy steel uniform inclined rod 31. Since a first locking internal threaded hole 33 is provided on the top surface of the first U-shaped frame 32 and in the center position close to the open end, and the first locking internal threaded hole 33 passes through the bottom surface of the second alloy steel C-shaped frame 12, and at the same time, the inner cavity of the first locking internal threaded hole 33 is rotatably connected with a first locking bolt 34, so that the first locking bolt 34 can be rotatably connected to the inner cavity of the first locking internal threaded hole 33, so that the first locking bolt 34 can be tightened to the first U-shaped frame 32. Since the other end of the alloy steel uniform inclined rod 31 is fixedly connected to the second U-shaped frame 35, and the second U-shaped The top surface and bottom surface of the inner cavity of the frame 35 are respectively connected to the top surface and bottom surface of the top alloy steel equalizing ring 4, so that the second U-shaped frame 35 can be engaged on the top alloy steel equalizing ring 4, and then the top alloy steel equalizing ring 4 can be connected to the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 through the alloy steel uniform inclined rod 31, so as to reduce the deformation and failure risks caused by pressure differences. A second locking internal threaded hole 36 is provided on the top surface of the second U-shaped frame 35 and in the center position close to the open end, and the second locking internal threaded hole 36 passes through the bottom surface of the second U-shaped frame 35, and at the same time, the second locking internal threaded hole 36 is rotatably connected to the inner cavity of the second locking internal threaded hole 36 with a second locking bolt 37, so that the second locking bolt 37 can be fixedly connected to the second locking internal threaded hole 36, and then the second locking bolt 37 can fix the open end of the second U-shaped frame 35, so as to prevent the second U-shaped frame 35 from falling off.

[0036] During operation, when the high-strength split-type pressure-equalizing ring needs to be installed, first place the installation component 1 in the preset position, and then respectively insert the two limit components 2 into the top side and the bottom side of the installation component 1, so that the two limit components 2 can limit and fix the installation component 1. Since the top of the installation component 1 is fixedly connected to the top of the alloy steel pressure-equalizing ring 4, and a plurality of connecting components 3 are arranged around the outer side of the top alloy steel pressure-equalizing ring 4, and the bottom surfaces of the plurality of connecting components 3 are respectively arranged around the outer side of the installation component 1, the plurality of connecting components 3 can provide support and fixation for the installation component 1 and the top alloy steel pressure-equalizing ring 4, so that the equipment can be formed into a whole, so that the equipment can reduce the risk of deformation and failure caused by pressure difference. When the equipment needs to be disassembled, the staff can remove it from the installation component 1 and the top alloy steel pressure-equalizing ring 4 through the plurality of connecting components 3, so that the equipment can be split, so that it is convenient for the staff to transport it, so as to improve the convenience.

[0037] The first alloy steel C-shaped frame 11 in the installation component 1 can be installed in a preset position and provide an installation foundation for the second alloy steel C-shaped frame 12. Since a limiting groove 13 is provided at the intersection of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, and special-shaped grooves 14 are provided on both end surfaces of the first alloy steel C-shaped frame 11, special-shaped blocks 15 are fixedly provided on both end surfaces of the second alloy steel C-shaped frame 12, and the two special-shaped blocks 15 are respectively inserted into the inner cavities of the two special-shaped grooves 14, so that the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 can be plugged and connected, and then the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 can be made into a whole. Since the two opposing limiting grooves 13 are plugged and connected with the limiting component 2, the limiting component 2 can perform secondary fixation on the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, so as to improve the stability of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12.

[0038] The limit block 21 in the limit assembly 2 can be inserted into the inner cavity of the limit groove 13, and the installation foundation of the two clamping plates 22 can be improved. Since the clamping grooves 16 for the clamping plates 22 are opened at the center positions on both sides of the limit groove 13, the two clamping plates 22 can be inserted into the inner cavities of the two clamping grooves 16, and then the two clamping plates 22 can connect and fix the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, so as to improve stability. Since the spring pin 23 is embedded and connected at the center position of the top surface of the two clamping plates 22, a pin hole for the output end of the limiting spring pin 23 is opened at the center position of the top surface of each inner cavity of the clamping groove 16, so that the output end of the spring pin 23 can be inserted into the inner cavity of the pin hole, and then the clamping plate 22 can be prevented from falling off from the inner cavity of the clamping groove 16, so as to prevent the limit block 21 from falling off from the inner cavity of the limit groove 13.

[0039] The alloy steel uniform inclined rod 31 in the connecting component 3 can provide an installation foundation for the first U-shaped frame 32, so that the bottom surface and top surface of the inner cavity of the first U-shaped frame 32 can be respectively engaged with the bottom surface and top surface of the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12, so that the first U-shaped frame 32 can provide support for the alloy steel uniform inclined rod 31. Since a first locking internal threaded hole 33 is provided on the top surface of the first U-shaped frame 32 and in the center position close to the open end, and the first locking internal threaded hole 33 passes through the bottom surface of the second alloy steel C-shaped frame 12, and at the same time, the inner cavity of the first locking internal threaded hole 33 is rotatably connected with a first locking bolt 34, so that the first locking bolt 34 can be rotatably connected to the inner cavity of the first locking internal threaded hole 33, so that the first locking bolt 34 can be tightened to the first U-shaped frame 32. Since the other end of the alloy steel uniform inclined rod 31 is fixedly connected to the second U-shaped frame 35, and the second U-shaped The top surface and bottom surface of the inner cavity of the frame 35 are respectively connected to the top surface and bottom surface of the top alloy steel equalizing ring 4, so that the second U-shaped frame 35 can be engaged on the top alloy steel equalizing ring 4, and then the top alloy steel equalizing ring 4 can be connected to the first alloy steel C-shaped frame 11 and the second alloy steel C-shaped frame 12 through the alloy steel uniform inclined rod 31, so as to reduce the deformation and failure risks caused by pressure differences. A second locking internal threaded hole 36 is provided on the top surface of the second U-shaped frame 35 and in the center position close to the open end, and the second locking internal threaded hole 36 passes through the bottom surface of the second U-shaped frame 35, and at the same time, the second locking internal threaded hole 36 is rotatably connected to the inner cavity of the second locking internal threaded hole 36 with a second locking bolt 37, so that the second locking bolt 37 can be fixedly connected to the second locking internal threaded hole 36, and then the second locking bolt 37 can fix the open end of the second U-shaped frame 35, so as to prevent the second U-shaped frame 35 from falling off.

[0040] In summary, the device is convenient for installation and disassembly, and is also convenient for transporting the equipment, thereby preventing bumps during transportation and improving transportation safety.

[0041] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A high-strength split pressure equalizing ring, characterized in that: include: A top alloy steel pressure equalizing ring (4), wherein the top alloy steel pressure equalizing ring (4) is used to equally distribute pressure, so as to reduce the risk of deformation and failure caused by pressure differences; A connecting assembly (3), wherein a plurality of the connecting assemblies (3) are provided, and the plurality of connecting assemblies (3) are distributed in a circular array, and the plurality of connecting assemblies (3) are arranged on the outside of the top alloy steel equalizing pressure ring (4), and the connecting assembly (3) is used to support and fix the top alloy steel equalizing pressure ring (4); An installation component (1), the installation component (1) being arranged at the bottom of the connection component (3), the installation component (1) being used to provide installation and fixation for the connection component (3); and A limit assembly (2), wherein two limit assemblies (2) are provided, and the two limit assemblies (2) are respectively provided on the top side and the bottom side of the installation assembly (1), and the limit assembly (2) is used to limit the installation assembly (1).

2. A high-strength split pressure equalizing ring according to claim 1, characterized in that: The mounting assembly (1) comprises a first alloy steel C-shaped frame (11), a second alloy steel C-shaped frame (12) being arranged at a symmetrical position of the first alloy steel C-shaped frame (11), a limiting groove (13) being provided at the intersection of the first alloy steel C-shaped frame (11) and the second alloy steel C-shaped frame (12), and two opposing limiting grooves (13) being plug-connected to the limiting assembly (2).

3. A high-strength split pressure equalizing ring according to claim 2, characterized in that: The first alloy steel C-shaped frame (11) and the second alloy steel C-shaped frame (12) are cross-distributed.

4. A high-strength split pressure equalizing ring according to claim 3, characterized in that: Both end surfaces of the first alloy steel C-shaped frame (11) are provided with special-shaped grooves (14), and both end surfaces of the second alloy steel C-shaped frame (12) are fixedly provided with special-shaped blocks (15), and the two special-shaped blocks (15) are respectively inserted into the inner cavities of the two special-shaped grooves (14).

5. A high-strength split pressure equalizing ring according to claim 4, characterized in that: The limiting assembly (2) comprises a limiting block (21), the limiting block (21) being arranged in the inner cavity of the limiting groove (13), a clamping plate (22) being arranged at the center positions on both sides of the limiting block (21), and a clamping groove (16) for clamping the clamping plate (22) being arranged at the center positions on both sides of the limiting groove (13).

6. A high-strength split pressure equalizing ring according to claim 5, characterized in that: A spring pin (23) is embedded and connected at the center of the top surface of the two engaging plates (22), and a pin hole for limiting the output end of the spring pin (23) is provided at the center of the top surface of the inner cavity of each engaging slot (16).

7. The high-strength split pressure equalizing ring according to claim 2, characterized in that: The connection assembly (3) comprises an alloy steel uniform inclined rod (31), a first U-shaped frame (32) is arranged at one end of the alloy steel uniform inclined rod (31), a first locking internal thread hole (33) is opened on the top surface of the first U-shaped frame (32) and at a central position close to the open end, the first locking internal thread hole (33) passes through the bottom surface of the second alloy steel C-shaped frame (12), and a first locking bolt (34) is rotatably connected to the inner cavity of the first locking internal thread hole (33); A second U-shaped frame (35) is provided at the other end of the alloy steel uniform inclined rod (31); a second locking internal threaded hole (36) is provided on the top surface of the second U-shaped frame (35) and at a central position close to the open end; the second locking internal threaded hole (36) passes through the bottom surface of the second U-shaped frame (35); a second locking bolt (37) is rotatably connected to the inner cavity of the second locking internal threaded hole (36).

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