Fault detection device for power distribution equipment of low-voltage line equipment distribution network

Abstract

The invention provides a fault detection device for a low-voltage line and distribution network power distribution equipment, and belongs to the technical field of fault detection. The device is mainly composed of a fault detection assembly, an auxiliary detection assembly and a positive four-wheel walking mechanism. The fault detection assembly comprises a box body and an internal fault detection main body, the main body is electrically connected with two alligator clips, and a box cover is hinged to an opening of the box top. The auxiliary detection assembly is connected with the handle and the pressing unit through the first telescopic rod, the pressing unit is composed of a first pressing part, a second pressing part and a power part, the first pressing part and the second pressing part are detachably matched with the alligator clip pressing part, automatic clamping or separation is achieved through the power part, and releasing and clamping of the alligator clip are controlled. The device can prevent people from contacting live parts in the box, and reduces the risk of electric shock. The clamping position of the alligator clip can be accurately controlled, and the signal acquisition accuracy and stability are improved; the four-wheel walking mechanism is matched with the pressing unit for operation, so that fatigue of personnel can be relieved, efficiency is improved, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of fault detection, and more particularly, to a fault detection device for low-voltage line equipment and distribution network power distribution equipment. Background Art

[0002] The fault detection device for distribution network power distribution equipment is a useful assistant for maintenance personnel when troubleshooting faults in distribution network power distribution equipment. This device integrates a variety of professional sensors, which can comprehensively collect various key data during the operation of the equipment, covering electrical parameters, physical states and other information. Through the built-in intelligent algorithms and complex data analysis models, the collected data is analyzed quickly and accurately.

[0003] The fault detection devices in the prior art mainly consist of a signal acquisition module, a data analysis and processing unit, and a display and alarm device. Its working principle is to establish an electrical connection with the distribution network power distribution equipment by means of alligator clips. The alligator clips have good electrical conductivity and firm clamping force, and can stably clamp on the terminal posts or wires of the equipment, so as to obtain the current and voltage signals during the operation of the equipment. After the signal acquisition module collects these signals, they are transmitted to the data analysis and processing unit. This unit analyzes the signals using specific algorithms and compares them with the preset normal operation parameters. Once an abnormality is detected, the display and alarm device will be triggered to intuitively feedback the equipment fault and its related information to the operator, facilitating timely troubleshooting and repair work.

[0004] However, when the operator holds the alligator clip and reaches into the box of the distribution network power distribution equipment, there are many disadvantages. First of all, this operation method has a high safety risk, because there may be live parts in the box, and a slight negligence may cause the operator to get an electric shock and endanger life safety. Secondly, the operation space is usually relatively narrow, the internal structure of the box is complex, and it is difficult for the alligator clip to accurately and stably clamp to the target position, thus affecting the accuracy and stability of signal acquisition. Moreover, when operating in a narrow space, the operator is prone to fatigue and the operation efficiency is low. In addition, frequent manual reaching operations may accidentally collide with and damage other components in the box, thus affecting the normal operation of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a fault detection device for low-voltage line equipment and distribution network power distribution equipment, aiming to solve the technical problems in the above background art.

[0006] The embodiments of the present invention are implemented as follows:

[0007] An embodiment of the present application provides a fault detection device for low-voltage line equipment and distribution network power distribution equipment, including: a fault detection component, including a box body and a fault detection main body. An opening is provided at the top of the box body, and a box cover is hinged to the opening. The fault detection main body is arranged inside the box body, and the fault detection main body is electrically connected to two alligator clips; an auxiliary detection component, including a first telescopic rod, a handle, and a pressing unit. The handle and the pressing unit are respectively arranged at both ends of the first telescopic rod; wherein, the pressing unit includes a first pressing part, a second pressing part, and a power part. The first pressing part and the second pressing part are in a clamping and cooperating relationship, and the power part is used to drive the first pressing part and the second pressing part to perform automatic clamping or separating operations. The first pressing part is arranged on the first telescopic rod, and the first pressing part and the second pressing part are respectively detachably cooperated with two pressing parts of any one of the alligator clips. When the first pressing part and the second pressing part are clamped and cooperated with each other, the alligator clip is released, and when the first pressing part and the second pressing part are separated and cooperated with each other, the alligator clip is clamped; a four-wheel walking mechanism arranged at the bottom side of the box body.

[0008] Further, based on the foregoing solution, the power part includes an electromagnet, a magnetic body, and a spring. The electromagnet and the magnetic body are magnetically attracted and cooperated with each other, and are respectively arranged on the first pressing part and the second pressing part. The spring is arranged between the first pressing part and the second pressing part, and is used to drive the separation of the first pressing part and the second pressing part after clamping.

[0009] Further, based on the foregoing solution, the first pressing part is provided with a first lighting lamp.

[0010] Further, based on the foregoing solution, the first pressing part and the second pressing part are both provided with insertion posts;

[0011] Two pressing parts of any one of the alligator clips are respectively provided with a slot and a chute for respectively docking and cooperating with the two insertion posts.

[0012] Further, based on the foregoing solution, the box body includes a bottom plate and a receiving part which is liftably arranged on the upper side of the bottom plate. The four-wheel walking mechanism is arranged on the bottom side of the bottom plate;

[0013] Wherein, the bottom plate and the receiving part are connected by a second telescopic rod.

[0014] Further, based on the foregoing solution, a second lighting lamp is arranged on the side of the receiving part;

[0015] Wherein, the second lighting lamp and the receiving part are connected by a third telescopic rod.

[0016] Further, based on the foregoing solution, the number of the foregoing third telescopic rods is two;

[0017] Wherein, the foregoing second lighting lamp includes two detachably mating lighting units, which are respectively detachably connected to the two foregoing third telescopic rods, and a magnet member is disposed on the back side of any one of the foregoing lighting units.

[0018] Further, based on the foregoing solution, a towing rod is hinged to the outer ring surface of the foregoing box body, and a pull ring is disposed at one end of the towing rod away from the foregoing box body.

[0019] Further, based on the foregoing solution, the foregoing box cover is hinged to the foregoing box body through a hinge, and a handle is disposed on the top side of the foregoing box cover.

[0020] Further, based on the foregoing solution, both the foregoing first telescopic rod and the foregoing handle are made of insulating materials.

[0021] Compared with the prior art, the embodiments of the present invention at least have the following advantages or beneficial effects:

[0022] When the fault detection device of the present application is in use, an operator holds the handle by hand and uses the first telescopic rod to bring the pressing unit close to the power distribution equipment to be detected. When it is necessary to operate the alligator clip, the power unit drives the first pressing part and the second pressing part to act. When the two cooperate with each other in a clamping manner, the two pressing parts of the alligator clip are opened to achieve a release operation; when the two cooperate with each other in a separating manner, the two pressing parts of the alligator clip rebound to perform a clamping operation, so as to establish an electrical connection with the equipment. The fault detection main body obtains the equipment operation data through the alligator clip and performs fault detection. Compared with the traditional manual insertion installation, its advantages are remarkable. First, it avoids the operator directly contacting the live components in the box body, greatly reducing the risk of electric shock and ensuring the personal safety of the personnel. Second, with the detachable cooperation between the pressing unit and the alligator clip, the clamping position of the alligator clip can be accurately controlled, improving the accuracy and stability of signal acquisition. Third, the positive four-wheel walking mechanism can be used to flexibly move the device, cooperating with the operation of the pressing unit, eliminating the need for personnel to perform manual operations in a narrow space for a long time, reducing the fatigue of the operator and improving the operation efficiency. Moreover, it reduces the possibility of accidental collision and damage to other components in the box body caused by manual insertion, effectively ensuring the normal operation of the equipment. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 Isometric view of a fault detection device for low - voltage line equipment and distribution network power distribution equipment in an embodiment of the present invention Figure 1 ;

[0025] Figure 2 Isometric view of a fault detection device for low - voltage line equipment and distribution network power distribution equipment in an embodiment of the present invention Figure 2 ;

[0026] Figure 3 Isometric view of a fault detection device for low - voltage line equipment and distribution network power distribution equipment in an embodiment of the present invention Figure 3 ;

[0027] Figure 4 Is Figure 3 Partial enlarged view of A in

[0028] Figure 5 Isometric view of the pressing unit in an embodiment of the present invention Figure 1 ;

[0029] Figure 6 Isometric view of the pressing unit in an embodiment of the present invention Figure 2 ;

[0030] Figure 7 Isometric view of the alligator clip in an embodiment of the present invention;

[0031] Figure 8 Isometric view of the auxiliary detection component in an embodiment of the present invention.

[0032] Icons: 1 - box body, 101 - bottom plate, 102 - accommodating part, 2 - fault detection main body, 3 - traction rod, 4 - pull ring, 5 - auxiliary detection component, 501 - first pressing part, 502 - second pressing part, 503 - spring, 504 - magnetic body, 505 - plug post, 506 - electromagnet, 6 - alligator clip, 601 - chute, 602 - slot, 7 - first telescopic rod, 8 - handle, 9 - second telescopic rod, 10 - box cover, 11 - first lighting lamp, 12 - third telescopic rod, 13 - grip, 14 - four - wheel walking structure, 15 - second lighting lamp. Detailed implementation manners

[0033] The following describes the embodiments of the present application in detail with reference to the accompanying drawings in the embodiments of the present application.

[0034] Embodiment

[0035] Please refer to Figures 1 - 8, an embodiment of the present application provides a fault detection device for low-voltage line equipment and distribution network power distribution equipment, including: a fault detection component, including a box body 1 and a fault detection main body 2. An opening is provided at the top of the box body 1, and a box cover 10 is hinged to the opening. The fault detection main body 2 is arranged inside the box body 1, and the fault detection main body 2 is electrically connected to two alligator clips 6; an auxiliary detection component 5, including a first telescopic rod 7, a handle 8 and a pressing unit. The handle 8 and the pressing unit are respectively arranged at both ends of the first telescopic rod 7; wherein, the pressing unit includes a first pressing part 501, a second pressing part 502 and a power part. The first pressing part 501 and the second pressing part 502 are in a clamping and cooperating relationship, and the power part is used to drive the first pressing part 501 and the second pressing part 502 to perform automatic clamping or separating operations. The first pressing part 501 is arranged on the first telescopic rod 7, and the first pressing part 501 and the second pressing part 502 are respectively detachably cooperated with two pressing parts of any one of the alligator clips 6. When the first pressing part 501 and the second pressing part 502 are clamped and cooperated with each other, the alligator clip 6 is released. When the first pressing part 501 and the second pressing part 502 are separated and cooperated with each other, the alligator clip 6 is clamped; a four-wheel walking mechanism arranged at the bottom side of the box body 1.

[0036] When the fault detection device of the present application is in use, the operator holds the handle 8 by hand and uses the first telescopic rod 7 to bring the pressing unit close to the distribution network power distribution equipment to be detected. When it is necessary to operate the alligator clip 6, the power part drives the first pressing part 501 and the second pressing part 502 to act. When the two are clamped and cooperated with each other, the two pressing parts of the alligator clip 6 are opened to realize the release operation; when the two are separated and cooperated with each other, the two pressing parts of the alligator clip 6 rebound to perform the clamping operation, so as to establish an electrical connection with the equipment. The fault detection main body 2 obtains the equipment operation data through the alligator clip 6 and performs fault detection. Compared with the traditional manual insertion installation, its advantages are obvious. First of all, it avoids the operator directly contacting the live parts inside the box body 1, greatly reducing the risk of electric shock and ensuring the safety of personnel's lives. Secondly, with the help of the detachable cooperation between the pressing unit and the alligator clip 6, the clamping position of the alligator clip 6 can be accurately controlled, improving the accuracy and stability of signal acquisition. Furthermore, the four-wheel walking mechanism can be used to flexibly move the device, cooperate with the operation of the pressing unit, and there is no need for personnel to manually operate for a long time in a narrow space, reducing the fatigue of the operator and improving the operation efficiency. Moreover, it reduces the possibility of accidental collision and damage to other components inside the box body 1 caused by manual insertion, effectively ensuring the normal operation of the equipment.

[0037] As a preferred embodiment, the above-mentioned power unit includes an electromagnet 506, a magnetic body 504 and a spring 503. The electromagnet 506 is magnetically attracted and cooperated with the magnetic body 504, and is respectively arranged on the first pressing part 501 and the second pressing part 502. The spring 503 is arranged between the first pressing part 501 and the second pressing part 502 for driving the separation after the first pressing part 501 and the second pressing part 502 are clamped.

[0038] In the above embodiment, when the power unit works, the electromagnet 506 is energized to generate magnetism, which is magnetically attracted to the magnetic body 504, overcoming the elastic force of the spring 503, so that the first pressing part 501 and the second pressing part 502 approach each other to realize the clamping of the pressing part of the alligator clip 6, so as to release the alligator clip 6. When the electromagnet 506 is powered off and the magnetism disappears, the elastic force of the spring 503 takes effect, driving the first pressing part 501 and the second pressing part 502 to separate from each other, so that the alligator clip 6 completes the clamping action. This structure is simple and reliable. By controlling the magnetic attraction with the on-off of the electromagnet 506, the operation is convenient, and the actions of the first and second pressing parts 502 can be accurately controlled to ensure that the alligator clip 6 is stably released and clamped as required. Moreover, the use of the spring 503 can automatically push the pressing part to reset after power off, ensuring the continuity of the action and improving the overall use effect of the fault detection device.

[0039] As a preferred embodiment, the above-mentioned first pressing part 501 is provided with a first lighting lamp 11.

[0040] In the above embodiment, inside the box body 1 of the distribution network power distribution equipment, the environment is usually dimly lit, and it is difficult to see the installation position of the alligator clip 6 clearly. The first lighting lamp 11 can illuminate the operation area, enabling the operator to clearly see the target position to be clamped by the alligator clip 6, avoiding installation deviation caused by unclear vision, improving the accuracy and stability of the installation of the alligator clip 6, and ensuring normal signal acquisition. At the same time, it reduces the time waste caused by repeatedly trying to install due to insufficient light, and improves the operation efficiency.

[0041] As a preferred embodiment, the above-mentioned first pressing part 501 and the second pressing part 502 are both provided with insertion posts 505;

[0042] Two pressing parts of any one of the above-mentioned alligator clips 6 are respectively provided with a slot 602 and a chute 601 for respectively docking and cooperating with the two above-mentioned insertion posts 505.

[0043] In the above embodiments, the insertion post 505 of the first pressing part 501 is in plug-in fit with the slot 602 of the alligator clip 6, and the insertion post 505 of the second pressing part 502 is inserted into and slidably engaged with the chute 601 of the alligator clip 6, so as to meet the pressing operation requirements of the alligator clip 6. After the alligator clip 6 completes the directional clamping, it is only necessary to directly separate the insertion post 505 by operating the handle 8, and the operation is simple and convenient.

[0044] As a preferred embodiment, the above-mentioned box body 1 includes a bottom plate 101 and a receiving part 102 which is arranged on the upper side of the bottom plate 101 in a liftable manner, and the above-mentioned four-wheel walking mechanism is arranged on the bottom side of the bottom plate 101;

[0045] Wherein, the bottom plate 101 and the receiving part 102 are connected by a second telescopic rod 9.

[0046] In the above embodiments, the receiving part 102 can be lifted on the upper side of the bottom plate 101 through the second telescopic rod 9, and the height can be flexibly adjusted according to the actual detection scenario to adapt to distribution network and power distribution equipment of different heights, improving the versatility of the fault detection device. Secondly, the four-wheel walking mechanism is arranged on the bottom side of the bottom plate 101. Combining with the liftable characteristics of the receiving part 102, it is convenient to move the whole device to the detection location, and the height can be adjusted to a suitable height during detection, without the need for operators to bend down frequently or use additional padding tools, reducing the labor intensity of the operators and improving the detection efficiency.

[0047] As a preferred embodiment, a second lighting lamp 15 is arranged on the side of the above-mentioned receiving part 102;

[0048] Wherein, the second lighting lamp 15 and the receiving part 102 are connected by a third telescopic rod 12.

[0049] In the above embodiments, when a fault is detected in the distribution network and power distribution equipment, the light inside the box body 1 is often poor. The second lighting lamp 15 can flexibly adjust its position and angle through the third telescopic rod 12 to illuminate the corners inside the equipment that are difficult to see clearly, ensuring that the operator can clearly observe the state of the equipment. Whether it is checking the circuit connection, component condition, or installing the alligator clip 6, etc., it can be more accurate and efficient. It can avoid operation errors caused by insufficient light, reduce the time consumed by repeated confirmation, improve the efficiency and accuracy of the overall detection work, and ensure the smooth progress of the fault detection process.

[0050] As a preferred embodiment, the number of the above-mentioned third telescopic rods 12 is two;

[0051] Wherein, the second lighting lamp 15 includes two detachable lighting units, which are respectively detachably connected to the two above-mentioned third telescopic rods 12, and a magnet piece is arranged on the back side of any one of the lighting units.

[0052] In the above embodiment, after the lighting unit is disassembled, it can be adsorbed inside the box 1 by a magnet, so that the lighting mode is flexible and diverse, and the effect is better.

[0053] As a preferred embodiment, a traction rod 3 is hinged on the outer ring surface of the box body 1 , and a pull ring 4 is provided at one end of the traction rod 3 away from the box body 1 .

[0054] In the above embodiment, when the device needs to be transferred, the staff can easily drag the device with the four-wheel walking mechanism by pulling the pull ring 4 and using the traction rod 3, which is more labor-saving than direct human transportation. Moreover, the articulated design of the traction rod 3 enables it to flexibly adjust the angle to adapt to different moving paths and venues, such as narrow aisles, turning areas, etc., which is convenient for transportation in various complex distribution network working environments, improves the mobility and transfer efficiency of the device, and ensures that it can quickly reach the fault detection site.

[0055] As a preferred embodiment, the box cover 10 is hinged to the box body 1 via hinges, and a handle 8 is provided on the top side of the box cover 10 .

[0056] In the above embodiment, the box cover 10 is hinged to the box body 1 by hinges, so that the box cover 10 can be easily opened and closed, which is convenient for the staff to perform daily maintenance, inspection or replacement of the fault detection body 2 and other components inside the box body 1. The handle 13 set on the top side of the box cover 10 provides a fulcrum for opening and closing the box cover 10, making the operation more convenient and labor-saving. The staff can easily control the opening and closing action of the box cover 10 by holding the handle 13, reducing the difficulty of operation and improving work efficiency, while also avoiding damage to the box cover 10 due to improper barehand operation.

[0057] As a preferred implementation, the first telescopic rod 7 and the handle 8 are both made of insulating material.

[0058] In the above embodiment, the first telescopic rod 7 and the handle 8 are made of insulating materials, which greatly improves the safety of the fault detection device. During operation, the operator holds the insulating handle 8 and controls the pressing unit through the insulating first telescopic rod 7. Even if it touches the distribution network and power distribution equipment that may leak electricity, it can effectively block the current conduction and prevent electric shock accidents. This not only ensures the safety of personnel, but also allows operators to focus more on detection work without worrying about the safety risks caused by equipment leakage, ensuring that the fault detection operation is stable and efficient, and reducing the interference of accidents on the detection work.

[0059] In addition, unless otherwise clearly specified or defined, in the embodiments of the present application, if the terms "install" or "connect" appear, they should be understood in a broad sense. For example, "connect" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. If terms such as "upper", "lower", "left", "right", "inner", "outer", "side" and other orientation terms appear, they are only references to the direction of the attached drawings or the orientation in which the product is usually placed during use, and are only for clearly describing the present application, 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 should not be construed as a limitation to the present application. Terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance; "a plurality of" means at least two. In the embodiments of the present application, the limitations on relative position relationships such as parallel, perpendicular, and alignment mentioned are all with respect to the current technological level and are not absolute and strict limitations. A small deviation is allowed, and approximate parallelism, approximate perpendicularity, approximate alignment, etc. are all acceptable. For example, if A is parallel to B, it means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees.

[0060] The above are only some embodiments and implementation manners of the present application. The protection scope of the present application is not limited thereto. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other, and any combination of features in different embodiments is also within the protection scope of the present application. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A fault detection device for low-voltage line equipment and distribution network distribution equipment, characterized in that, Comprising: A fault detection component, including a box body (1) and a fault detection main body (2). An opening is provided at the top of the box body (1), and a box cover (10) is hinged to the opening. The fault detection main body (2) is arranged inside the box body (1), and the fault detection main body (2) is electrically connected to two alligator clips (6); An auxiliary detection component (5), including a first telescopic rod (7), a handle (8) and a pressing unit. The handle (8) and the pressing unit are respectively arranged at both ends of the first telescopic rod (7); Wherein, the pressing unit includes a first pressing part (501), a second pressing part (502) and a power part. The first pressing part (501) and the second pressing part (502) are in a clamping cooperation relationship. The power part is used to drive the first pressing part (501) and the second pressing part (502) to perform automatic clamping or separating operations. The first pressing part (501) is arranged on the first telescopic rod (7). The first pressing part (501) and the second pressing part (502) are respectively detachably cooperated with two pressing parts of any one of the alligator clips (6). When the first pressing part (501) and the second pressing part (502) are clamped and cooperated with each other, the alligator clip (6) is released. When the first pressing part (501) and the second pressing part (502) are separated and cooperated with each other, the alligator clip (6) is clamped; A four-wheel walking mechanism arranged at the bottom side of the box body (1).

2. The fault detection device for low-voltage line equipment power distribution equipment according to claim 1, characterized in that, The power part includes an electromagnet (506), a magnetic body (504) and a spring (503). The electromagnet (506) is magnetically attracted and cooperated with the magnetic body (504), and is respectively arranged on the first pressing part (501) and the second pressing part (502). The spring (503) is arranged between the first pressing part (501) and the second pressing part (502) and is used to drive the separation of the first pressing part (501) and the second pressing part (502) after clamping.

3. The fault detection device for low-voltage line equipment power distribution equipment according to claim 2, characterized in that, The first pressing part (501) is provided with a first lighting lamp (11).

4. The fault detection device for a low-voltage line equipment power distribution network equipment according to claim 2, characterized in that, Both the first pressing part (501) and the second pressing part (502) are provided with inserting posts (505); Two pressing parts of any one of the alligator clips (6) are respectively provided with a slot (602) and a sliding groove (601) for respectively docking and cooperating with the two inserting posts (505).

5. The fault detection device for low-voltage line equipment and distribution network power distribution equipment according to claim 1, characterized in that, The box body (1) includes a bottom plate (101) and a receiving part (102) which is arranged on the upper side of the bottom plate (101) in a liftable manner. The four-wheel walking mechanism is arranged at the bottom side of the bottom plate (101); Wherein, the bottom plate (101) and the receiving part (102) are connected by a second telescopic rod (9).

6. The fault detection device for low-voltage line equipment and distribution network power distribution equipment according to claim 5, characterized in that, A second lighting lamp (15) is arranged on the side of the receiving part (102); Wherein, the second lighting lamp (15) is connected to the receiving part (102) by a third telescopic rod (12).

7. The fault detection device for low-voltage line equipment power distribution equipment according to claim 6, characterized in that, The number of the third telescopic rods (12) is two; Among them, the second lighting lamp (15) includes two detachably cooperating lighting units, which are respectively detachably connected to the two third telescopic rods (12), and a magnet member is provided on the back side of any one of the lighting units.

8. The fault detection device for a low-voltage line equipment power distribution equipment according to claim 1, wherein, A towing rod (3) is hinged to the outer ring surface of the box body (1), and a pull ring (4) is provided at one end of the towing rod (3) away from the box body (1).

9. The fault detection device for a low-voltage line equipment power distribution equipment according to claim 8, characterized in that, The box cover (10) is hinged to the box body (1) by a hinge, and a handle (13) is provided on the top side of the box cover (10).

10. The fault detection device for a low-voltage line equipment power distribution equipment according to claim 9, characterized in that, Both the first telescopic rod (7) and the handle (8) are made of insulating materials.

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