A clamping device

Abstract

The application relates to the field of power distribution live-line work and discloses a clamping device which comprises a first clamping part, a second clamping part, a third clamping part and a fourth clamping part. The first clamping part comprises a first clamping plate and a second clamping plate, and the second clamping plate is rotationally arranged or slidingly arranged on the first clamping plate. The third clamping plate is arranged on the outer side of the first clamping plate, the first end of the third clamping plate is hingedly connected with the first end of the fourth clamping plate, a first arc-shaped through groove and a second arc-shaped through groove are arranged between the third clamping plate and the fourth clamping plate, a stop part is arranged between the first arc-shaped through groove and the second arc-shaped through groove, the second arc-shaped through groove is located between the first arc-shaped through groove and the first end of the third clamping plate, and the inner diameter of the second arc-shaped through groove is smaller than that of the first arc-shaped through groove. The clamping device can quickly complete the fixing work of different drainage lines through the hierarchical clamping of different specifications of arc-shaped through grooves, and the work safety is improved.

Description

Technical Field

[0001] This invention relates to the field of live-line working technology in power distribution, and in particular to a clamping device. Background Technology

[0002] In the field of live-line work in power distribution networks, the use of insulated gloves for connecting wire splicing is an important technical means to ensure uninterrupted power supply and improve power reliability. In actual operation, this is usually done by two workers: one inside the work bucket to operate on the live end, and the other holding the connecting wire and placing it outside the bucket. Because the two workers are at different potentials, they cannot directly contact each other to avoid creating a current path, significantly limiting teamwork. Therefore, the worker on the live end often needs to independently complete preparatory work for connecting the wire, such as insulation shielding, stripping the insulation layer of the connecting wire, and adjusting the position of the bucket truck. Furthermore, workers must wear heavy insulated gloves for delicate operations, resulting in poor operational flexibility and low work efficiency, making the entire preparation process time-consuming and labor-intensive. In addition, the limited space inside the work bucket, which must also hold tools and materials, restricts the range of movement for personnel, increasing the risk of accidental contact with live parts and electric shock when working in complex circuit environments.

[0003] To reduce the workload of workers, existing technologies typically include a clamping device at the top edge of the working bucket wall to hold and secure the external drain wire, freeing the workers' hands and assisting in live-line splicing operations. However, existing clamping devices mostly use a single clamping structure, making it difficult to achieve stable adaptation for drain wires of different diameters. When clamping thinner drain wires, problems such as insecure clamping and slippage are prone to occur, while when clamping thicker drain wires, insufficient clamping space is often encountered, thus affecting the stability of the drain wire's fixation and the safety of live-line operations. Summary of the Invention

[0004] The technical problem to be solved by this invention is: to solve the problem of stable clamping and adaptation of drainage lines of different diameters.

[0005] To solve the above-mentioned technical problems, the present invention provides a clamping device, comprising: a first clamping part, the first clamping part including a first clamping plate and a second clamping plate, the second clamping plate being rotatably or slidably disposed on the first clamping plate to adjust the clamping space between the second clamping plate and the first clamping plate; a second clamping part, the second clamping part including a third clamping plate and a fourth clamping plate, the third clamping plate being disposed on the outer side of the first clamping plate, the first end of the third clamping plate being hinged to the first end of the fourth clamping plate, a first arc-shaped through groove and a second arc-shaped through groove being provided between the third clamping plate and the fourth clamping plate, a stop portion being provided between the first arc-shaped through groove and the second arc-shaped through groove, the second arc-shaped through groove being located between the first arc-shaped through groove and the first end of the third clamping plate, and the inner diameter of the second arc-shaped through groove being smaller than the inner diameter of the first arc-shaped through groove.

[0006] Furthermore, the second clamping part also includes a bolt, which is fixedly disposed on the second end of the third clamping plate. The second end of the fourth clamping plate is provided with a second through groove, through which the bolt passes. The bolt is provided with a bolt head that abuts against the fourth clamping plate.

[0007] Furthermore, the stop portion includes a first boss disposed on the third clamping plate and a second boss disposed on the fourth clamping plate. When the first boss and the second boss abut against each other, there is a first gap at the end of the first arc-shaped through groove away from the stop portion.

[0008] Furthermore, the first clamping plate has a snap-fit ​​hole on the side away from the second clamping plate, and the third clamping plate has a snap-fit ​​component, which is detachably mounted on the snap-fit ​​hole.

[0009] Furthermore, the first clamping plate has a horizontally arranged first through groove on the side near the second clamping plate.

[0010] Furthermore, the first clamping plate has a snap-fit ​​hole on the side away from the second clamping plate, and the third clamping plate has a snap-fit ​​component, which is detachably mounted on the snap-fit ​​hole.

[0011] Furthermore, the first clamping plate is provided with a rotating shaft, which is located above the first through groove. The second clamping plate is rotatably mounted on the rotating shaft, and the rotating shaft is provided with a torsion spring, which is used to control the rotation angle of the second clamping plate.

[0012] Furthermore, both the first clamping plate and the second clamping plate are provided with handles, which are located above the pivot.

[0013] Furthermore, the first through groove is provided with a first insulating pad, and the second clamping plate is provided with a second insulating pad corresponding to the first insulating pad.

[0014] Furthermore, the first clamping plate is provided with a slide rail extending away from the second clamping part, the second clamping plate is slidably disposed on the slide rail, and the second clamping plate is provided with a locking member, which is used to control the sliding distance of the second clamping plate on the slide rail.

[0015] Furthermore, it also includes an alarm, which is installed on the first clamping part and is used to monitor the operating status of the second clamping part clamping the drain line.

[0016] Compared with the prior art, the clamping device of this invention has the following advantages: A first arc-shaped through groove and a second arc-shaped through groove are provided between the third and fourth clamping plates, and a stop structure is provided between them. The stop structure not only separates and limits different clamping areas and provides effective support for the drainage line, but also shortens the cantilever length of the first arc-shaped through groove. This improves the overall structural rigidity and clamping force of the clamping part when the drainage line is clamped at the end of the first arc-shaped through groove, reducing the possibility of slippage or shaking of the drainage line during the force application process, and improving clamping stability. Simultaneously, the stop structure also limits the minimum clamping space of the second arc-shaped through groove, preventing excessive compression of the smaller diameter drainage line clamped in the second arc-shaped through groove when the end of the first arc-shaped through groove is subjected to force, thereby ensuring clamping reliability. Meanwhile, it provides good protection for the conductors. The second arc-shaped through groove is located near the hinge end of the third clamping plate, and its inner diameter is smaller than that of the first arc-shaped through groove. Since the clamping space near the hinge end changes less, the second arc-shaped through groove can form a more compact and stable clamping space, which is more suitable for clamping and fixing small-diameter drain wires. It can effectively improve the fit and anti-detachment effect of small-specification drain wires. The first arc-shaped through groove with a larger inner diameter is suitable for larger-specification drain wires, so that the same device can be compatible with drain wires of different diameters, significantly improving the versatility and adaptability of the device. In addition, through the graded clamping setting of arc-shaped through grooves of different specifications, the fixing operation of different drain wires can be completed quickly without frequent changes of clamps, thereby optimizing the live-line operation process and improving construction efficiency and operation safety. Attached Figure Description

[0017] Figure 1 This is a perspective view of the clamping device provided by the present invention; Figure 2 This is a front view of the clamping device provided by the present invention; Figure 3 This is a perspective view of the first clamping part of the clamping device provided by the present invention; Figure 4 This is a perspective view of the second clamping part of the clamping device provided by the present invention.

[0018] The correspondence between the reference numerals and the component names is as follows: 1. First clamping part; 11. First clamping plate; 12. Second clamping plate; 13. Rotating shaft; 14. Torsion spring; 15. Handle; 16. First insulating pad; 17. Second insulating pad; 18. Stopping part; 181. First boss; 182. Second boss; 101. First through groove; 102. Snap-fit ​​hole; 103. First gap; 2. Second clamping part; 21. Third clamping plate; 22. Fourth clamping plate; 23. Bolt; 24. Bolt head; 241. Finger ring; 201. First arc-shaped through groove; 202. Second arc-shaped through groove; 3. Alarm. Detailed Implementation

[0019] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope of the invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0020] like Figures 1 to 4 As shown, an embodiment of the present invention discloses a clamping device, comprising: a first clamping part 1, the first clamping part 1 including a first clamping plate 11 and a second clamping plate 12, the second clamping plate 12 being rotatably or slidably disposed on the first clamping plate 11 to adjust the clamping space between the second clamping plate 12 and the first clamping plate 11; and a second clamping part 2, the second clamping part 2 including a third clamping plate 21 and a fourth clamping plate 22, the third clamping plate 21 being disposed on the outer side of the first clamping plate 11, the first end of the third clamping plate 21 being hinged to the first end of the fourth clamping plate 22, a first arc-shaped through groove 201 and a second arc-shaped through groove 202 being provided between the third clamping plate 21 and the fourth clamping plate 22, a stop part 18 being provided between the first arc-shaped through groove 201 and the second arc-shaped through groove 202, the second arc-shaped through groove 202 being located between the first arc-shaped through groove 201 and the first end of the third clamping plate 21, and the inner diameter of the second arc-shaped through groove 202 being smaller than the inner diameter of the first arc-shaped through groove 201.

[0021] The clamping device of this application stably clamps the edge of the working bucket through the first clamping plate 11 and the second clamping plate 12 in the first clamping part 1, so that the second clamping part 2 can be reliably fixed to the outside of the working bucket, providing a stable external support position for the guide line and reducing the labor burden and safety risks caused by the operator holding the guide line for a long time. At the same time, a first arc-shaped through groove 201 and a second arc-shaped through groove 202 are provided between the third clamping plate 21 and the fourth clamping plate 22, and a stop part 18 structure is provided between them. This not only can separate and limit the guide line, but also provide effective support for the guide line, and can shorten the cantilever length of the first arc-shaped through groove 201. Thus, when the guide line is clamped by force at the end of the first arc-shaped through groove 201, the overall structural rigidity and clamping force of the clamping part are improved, the possibility of slippage or shaking of the guide line during the force process is reduced, and the clamping stability is improved. At the same time, the stop part 18 can also limit the minimum clamping space of the second arc-shaped through groove 202, avoiding the first arc-shaped through groove 201 from being clamped by force. When the end of the through groove 201 is subjected to force, it excessively compresses the smaller diameter drain wire clamped in the second arc-shaped through groove 202, thereby ensuring the reliability of clamping while providing good protection for the wire. The second arc-shaped through groove 202 is located near the hinge end of the third clamping plate 21, and its inner diameter is smaller than that of the first arc-shaped through groove 201. Since the clamping space near the hinge end changes less, the second arc-shaped through groove 202 can form a more compact and stable clamping space, which is more suitable for clamping and fixing small diameter drain wires, and can effectively improve the fit and anti-detachment effect of small-specification drain wires. The first arc-shaped through groove 201 with a larger inner diameter is suitable for larger-specification drain wires, so that the same device can be compatible with drain wires of different diameters, significantly improving the versatility and adaptability of the device. In addition, through the graded clamping design of arc-shaped through grooves of different specifications, the fixing operation of different drain wires can be completed quickly without frequent changes of clamps, thereby optimizing the live working process and improving construction efficiency and operational safety.

[0022] This invention, by adjusting the distance between the first clamping plate 11 and the second clamping plate 12, can also ensure that the first clamping part 1 is firmly clamped and fixed to the edge of the working bucket, thereby ensuring good adaptability and reliability of the device under different structural conditions. This clamping device can stably fix the drain line outside the bucket, effectively preventing unsafe contact between the operator and the live end, preventing the human body from entering the circuit, and thus significantly protecting the personal safety of the operator. At the same time, this structure reduces the number of steps involved in repeatedly rotating and manually handling the drain line during operation, optimizing the overall work process and making live-line work more continuous and efficient. The external fixing of the drain line is directly completed by the first clamping part 1, eliminating the complex steps of adjusting the bucket position to retrieve the drain line in traditional operations; simultaneously, the second clamping part 2 can replace the original rope loop structure for stable fixing of the main line and the drain line, reducing the repeated installation and removal of the rope loop and the repetitive operation of insulating and shielding the main line, thereby achieving rapid connection of the drain line, significantly shortening the construction time and improving work efficiency.

[0023] Specifically, the clamping device of the present invention may also be equipped with an alarm 3, which is installed on the first clamping part 1 and used to monitor the operating status of the main line clamped by the second clamping part 2 in real time. When abnormal situations such as main line breakage, short circuit, or power failure occur, the alarm 3 can automatically emit a buzzer or warning signal to promptly remind the operator that the working environment has changed, thereby preventing personnel from continuing to operate under unknown risk conditions. Through this automatic alarm mechanism, the real-time perception capability of the line status can be effectively enhanced, the exposure time of operators under potential overvoltage or abnormal operating conditions can be reduced, the safety and reliability of the operation process can be further improved, and the operational safety of personnel and power lines can be comprehensively guaranteed.

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, in an optional embodiment of the present invention, the stop portion 18 includes a first boss 181 disposed on the third clamping plate 21 and a second boss 182 disposed on the fourth clamping plate 22. When the first boss 181 and the second boss 182 abut against each other, the first arc-shaped through groove 201 has a first gap 103 at one end away from the stop portion 18.

[0025] By setting the stop portion 18 as the first boss 181 on the third clamping plate 21 and the second boss 182 on the fourth clamping plate 22, and by ensuring that the first arc-shaped through groove 201 away from the stop portion 18 retains a first gap 103 when the first boss 181 and the second boss 182 abut against each other, the first arc-shaped through groove 201 is prevented from completely closing while ensuring clamping force. This structure not only limits the clamping space by utilizing the abutting action of the first boss 181 and the second boss 182, thus improving the stability of the clamping structure, but also maintains an appropriate elastic buffer space for the first arc-shaped through groove 201 when clamping larger diameter drain wires by reserving the first gap 103, preventing the wire from being excessively squeezed and causing surface damage. At the same time, during the process of wire being subjected to force or vibration, the first gap 103 can also provide a certain deformation compensation for the clamping portion, which helps to maintain a continuous and stable clamping force and reduce the possibility of wire slippage or loosening, thereby further improving the clamping adaptability, reliability, and safety of live operation of drain wires of different specifications.

[0026] like Figure 1 , Figure 2 and Figure 4 As shown, in an optional embodiment of the present invention, the second clamping part 2 further includes a bolt 23, the third clamping plate 21 is disposed on the side of the first clamping plate 11 away from the second clamping plate 12, the first end of the third clamping plate 21 is hinged to the first end of the fourth clamping plate 22, the bolt 23 is fixedly disposed on the second end of the third clamping plate 21, the second end of the fourth clamping plate 22 is provided with a second through groove, the bolt 23 passes through the second through groove, the bolt 23 is provided with a bolt head 24 that abuts against the fourth clamping plate 22, and the fourth clamping plate 22 is located between the bolt head 24 and the third clamping plate 21.

[0027] By hinged third clamping plate 21 and fourth clamping plate 22 to form an openable structure, and combined with bolt 23 and second through groove to form an adjustable locking mechanism, the clamping process is made more flexible and reliable. In use, the hinged structure can quickly open or close the clamping space, making it easy to place the drain line into the clamping area. Then, the opening and closing degree of the clamping plate is controlled by the movement of bolt 23 along the second through groove, realizing fine adjustment of the clamping distance. Stable locking is achieved by the abutment of bolt head 24 and fourth clamping plate 22, thus adapting to drain lines of different diameters or types, significantly improving the adaptability and versatility of the device. At the same time, after locking, the structure has good anti-loosening performance and clamping stability, which can effectively prevent the drain line from slipping or falling off during operation, reducing operational risks. In addition, the overall structure is simple and easy to operate, making it easy for a single person to quickly complete the clamping and fixing, further reducing the burden on live-line workers, improving work efficiency, and enhancing the safety and reliability of drain line fixing in complex working environments. It should be noted that the bolt head 24 abuts against the side of the fourth clamping plate 22 away from the third clamping plate 21.

[0028] Specifically, the first clamping plate 11 has a horizontally arranged first through groove 101 on the side near the second clamping plate 12.

[0029] like Figure 2 and Figure 4 As shown, in an optional embodiment of the present invention, the bolt head 24 is provided with a finger ring 241, which is located on the side of the fourth clamping plate 22 away from the third clamping plate 21.

[0030] By setting a finger ring 241 on the bolt head 24 and placing it on the side of the fourth clamping plate 22 away from the third clamping plate 21, the operator can directly hook or pull the finger ring 241 with their fingers to tighten and loosen the bolt 23 without the need for additional tools. This allows for convenient operation, especially when wearing insulated gloves, significantly improving adjustment efficiency and operational flexibility. At the same time, the structure of the finger ring 241 increases the force-bearing contact area, making it easier to apply torque and facilitate the quick locking and releasing of the clamping part, reducing the difficulty of single-handed operation. In addition, this structure keeps the adjustment position away from the clamping area, avoiding interference with the clamped drain line during the adjustment process, thereby ensuring clamping stability while improving the overall safety and convenience of the operation.

[0031] like Figure 3 As shown, in an optional embodiment of the present invention, the first clamping plate 11 is provided with a snap-fit ​​hole 102 on the side away from the second clamping plate 12, and the third clamping plate 21 is provided with a snap-fit ​​member, which is detachably disposed on the snap-fit ​​hole 102.

[0032] By providing a detachable connection structure between the snap-fit ​​hole 102 and the snap-fit ​​component between the first clamping plate 11 and the third clamping plate 21, the second clamping part 2 can be quickly installed or disassembled according to actual operation requirements. This not only facilitates transportation and storage and reduces the overall size of the device, but also allows for flexible replacement or adjustment of the clamping components according to different working conditions, significantly improving the modularity and applicability of the device. In actual use, the snap-fit ​​structure enables rapid positioning and reliable fixation. Compared with traditional fixed connection methods, it reduces installation steps and improves work efficiency, especially suitable for scenarios with limited time and narrow operating space in live-line work. In addition, this detachable design facilitates later maintenance and replacement of worn parts, reduces operating costs, and further enhances the practicality and safety of the overall device while ensuring connection stability.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, in the first embodiment of the present invention, the first clamping plate 11 is provided with a rotating shaft 13, which is located above the first through groove 101. The second clamping plate 12 is rotatably mounted on the rotating shaft 13. The rotating shaft 13 is provided with a torsion spring 14, which is used to control the rotation angle of the second clamping plate 12.

[0034] By setting a rotating shaft 13 with a torsion spring 14 above the first clamping plate 11, the second clamping plate 12 is rotatably connected to the first clamping plate 11, and forms an automatic reset and continuous clamping structure under the action of the torsion spring 14. When installed in the working bucket, it can achieve rapid opening and closing and adaptive clamping, and generate stable clamping force without repeated manual adjustment, thereby significantly improving the installation efficiency and clamping reliability of the device. At the same time, the elastic preload provided by the torsion spring 14 can effectively compensate for the risk of loosening caused by vibration or force changes, ensuring long-term stable operation of the clamping part. In addition, this structure makes it easier to complete the opening and closing action with one hand during operation, especially suitable for live operation scenarios where insulated gloves are worn, which reduces the difficulty of operation and human error, further improving the safety and convenience of the overall operation.

[0035] Specifically, the pivot 13 of the first clamping plate 11 is arranged horizontally, and the pivot 13 is parallel to the first through groove 101. The hooks at both ends of the torsion spring 14 abut against the first clamping plate 11 and the second clamping plate 12, respectively.

[0036] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, both the first clamping plate 11 and the second clamping plate 12 are provided with a handle 15, which is located above the rotating shaft 13.

[0037] By providing handles 15 above the pivot 13 on the first clamping plate 11 and the second clamping plate 12, operators can directly apply force to the handles 15 when installing or removing the clamping device, thus overcoming the spring force of the torsion spring 14 more effortfully to open and close the clamping plates, significantly improving the convenience and controllability of operation. This structure effectively avoids the risk of pinching hands caused by direct contact with the clamping part, while maintaining a good grip and operational stability even when wearing insulated gloves, reducing the difficulty of operation. In addition, the reasonable position of the handles 15 is conducive to forming a larger lever arm, improving the opening and closing efficiency, and enabling a single person to quickly complete the installation and adjustment of the clamping device, thereby further improving the work efficiency and safety during live-line work.

[0038] In the second embodiment of the present invention, the first clamping plate 11 is provided with a slide rail extending away from the second clamping part 2, the second clamping plate 12 is slidably disposed on the slide rail, and the second clamping plate 12 is provided with a locking member, which is used to control the sliding distance of the second clamping plate 12 on the slide rail.

[0039] By setting a slide rail on the first clamping plate 11 and allowing the second clamping plate 12 to slide along the slide rail, while simultaneously using locking components to control the sliding position in stages or by limiting it, the first clamping part 1 can flexibly adjust the clamping distance according to different sized work buckets, and reliably lock it after adjustment, thus achieving both good adaptability and clamping stability. Compared with a single fixed or continuous adjustment method, this structure can effectively avoid problems of insecure or overly tight clamping due to spacing deviation, improving installation accuracy. At the same time, the slide rail guide makes the adjustment process smoother and more stable, and the locking components can quickly complete the positioning, reducing repeated adjustment operations and significantly improving installation efficiency. In addition, the locking and limiting can also prevent the second clamping plate 12 from accidentally sliding under vibration or force changes, ensuring long-term stability of the clamping state, thereby improving the safety and reliability of the overall device in complex live-line working environments.

[0040] like Figure 2 As shown, in an optional embodiment of the present invention, a first insulating pad 16 is provided in the first through groove 101, and a second insulating pad 17 corresponding to the first insulating pad 16 is provided in the second clamping plate 12.

[0041] By setting a first insulating pad 16 in the first through slot 101 and a second insulating pad 17 at the corresponding position on the second clamping plate 12, the clamping device forms a double insulating protective layer when in contact with the working bucket flange and the guide wire. This not only effectively avoids direct contact between the metal structure and the conductive parts of the working bucket, reducing the risk of accidental conduction, but also provides buffering and protection for the guide wire during clamping, reducing wear or indentation on the surface of the guide wire by the hard structure. The insulating pad structure can also absorb vibration and impact to a certain extent, improving clamping stability and enabling the device to maintain reliable insulation performance in complex live-line working environments. In addition, the combined setting of the double-sided insulating pads can further improve the overall safety redundancy, enhance the electrical safety and reliability of the device, and thus better meet the high requirements for insulation protection in live-line work.

[0042] Specifically, the second clamping plate 12 has a soft pad on the side near the first clamping plate 11, and the soft pad corresponds to the first through groove 101. The soft pad can be one of a sponge pad, a rubber pad, or an air cushion.

[0043] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this invention can be achieved, and this is not limited herein.

[0044] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the principles of this invention should be included within the scope of protection of this invention.

Claims

1. A clamping device, characterized in that, include: The first clamping part includes a first clamping plate and a second clamping plate. The second clamping plate is rotatably or slidably disposed on the first clamping plate to adjust the clamping space between the second clamping plate and the first clamping plate. The second clamping part includes a third clamping plate and a fourth clamping plate. The third clamping plate is disposed on the outer side of the first clamping plate. The first end of the third clamping plate is hinged to the first end of the fourth clamping plate. A first arc-shaped through groove and a second arc-shaped through groove are provided between the third clamping plate and the fourth clamping plate. A stop part is provided between the first arc-shaped through groove and the second arc-shaped through groove. The second arc-shaped through groove is located between the first arc-shaped through groove and the first end of the third clamping plate. The inner diameter of the second arc-shaped through groove is smaller than the inner diameter of the first arc-shaped through groove.

2. The clamping device according to claim 1, characterized in that, The stop portion includes a first boss disposed on the third clamping plate and a second boss disposed on the fourth clamping plate. When the first boss and the second boss abut against each other, there is a first gap at the end of the first arc-shaped through groove away from the stop portion.

3. The clamping device according to claim 1, characterized in that, The second clamping part also includes a bolt, which is fixedly disposed on the second end of the third clamping plate. The second end of the fourth clamping plate is provided with a second through groove, through which the bolt passes. The bolt is provided with a bolt head that abuts against the fourth clamping plate.

4. The clamping device according to claim 1, characterized in that, The first clamping plate has a snap-fit ​​hole on the side away from the second clamping plate, and the third clamping plate has a snap-fit ​​component, which is detachably mounted on the snap-fit ​​hole.

5. The clamping device according to claim 1, characterized in that, The first clamping plate has a horizontally arranged first through groove on the side near the second clamping plate.

6. The clamping device according to claim 5, characterized in that, The first clamping plate is provided with a rotating shaft, which is located above the first through groove. The second clamping plate is rotatably mounted on the rotating shaft. The rotating shaft is provided with a torsion spring, which is used to control the rotation angle of the second clamping plate.

7. The clamping device according to claim 6, characterized in that, Both the first clamping plate and the second clamping plate are provided with handles, which are located above the pivot.

8. The clamping device according to claim 5, characterized in that, The first through groove is provided with a first insulating pad, and the second clamping plate is provided with a second insulating pad corresponding to the first insulating pad.

9. The clamping device according to claim 1, characterized in that, The first clamping plate is provided with a slide rail extending away from the second clamping part, the second clamping plate is slidably disposed on the slide rail, and the second clamping plate is provided with a locking member, which is used to control the sliding distance of the second clamping plate on the slide rail.

10. The clamping device according to claim 1, characterized in that, It also includes an alarm, which is installed on the first clamping part and is used to monitor the operating status of the second clamping part clamping the drain line.

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