External protection device for preventive test of power equipment

Abstract

The utility model relates to the technical field of electric power protection devices, and discloses an external protection device for preventive tests of electric power equipment, which comprises a counterweight seat, a vertical pipe and an isolation belt, an upper cover is fixed in the middle of the surface of the counterweight seat, the vertical pipe is vertically fixed above the upper cover, and a warning lamp is mounted at the top of the vertical pipe. An opening is formed in the surface of the counterweight seat at the bottom of the upper cover, a transverse plate is transversely fixed in the opening, and vertical rods vertically penetrate through the middle position of the transverse plate and the outer ring of the counterweight seat in a sliding manner. According to the technical scheme of the utility model, the copper sheets which can abut against the ground are arranged at the middle position and the outer ring in the counterweight seat, and the copper sheet at the middle position and the copper sheet at the outer ring are respectively connected to the two poles of the warning lamp, so that when a live cable is in contact with the ground, potential distribution taking a leakage point as the center is formed on the ground; a potential difference is inevitably formed between the copper sheet at the middle position and the copper sheet at one position of the outer ring, so that the warning lamp is lightened to send out early warning information.

Description

Technical Field

[0001] This utility model relates to the field of power protection device technology, specifically an external protection device for preventive testing of power equipment. Background Technology

[0002] Preventive testing of power equipment is a crucial part of the operation and maintenance of power equipment, aiming to ensure the safe and reliable operation of power systems and equipment. It involves inspecting, testing, or monitoring equipment already in operation according to prescribed test conditions, test items, and test cycles to promptly identify and eliminate potential faults and hidden dangers, preventing power accidents. Common test items include AC withstand voltage testing, DC withstand voltage testing, and partial discharge measurement. Preventive testing can assess the performance and condition of equipment, improve its reliability and stability, extend its service life, optimize system performance, and comply with relevant regulations, standards, and specifications. During testing, isolation and protective devices must be installed to prevent unauthorized personnel from approaching.

[0003] In practice, there is a possibility that the cable may accidentally come into contact with the ground, creating a potential distribution centered on the leakage point. Due to the uneven resistance distribution of the ground, a potential difference will be generated when the current flows through the ground. If test personnel are unaware that the cable is grounded and live, and walk across this area, a step voltage may form between their feet, and the current may flow through their body to form a circuit, leading to electric shock. Therefore, it is necessary to warn of situations where the ground is live. Thus, we propose an external protective device for preventative testing of power equipment. Utility Model Content

[0004] The purpose of this utility model is to provide an external protective device for preventive testing of power equipment. By setting copper plates that can be pressed against the ground in the middle position and on the outer ring inside the counterweight base, the copper plates in the middle position and the copper plates on the outer ring are respectively connected to the two poles of the warning light. When a live cable comes into contact with the ground, a potential distribution is formed on the ground centered on the leakage point. The copper plate in the middle position and one of the copper plates in the outer ring will inevitably have a potential difference when directly touched, which will cause the warning light to be lit and issue a warning information, thus solving the problem mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an external protective device for preventive testing of power equipment, comprising a counterweight, a vertical pipe, and an isolation belt. An upper cover is fixed to the center of the surface of the counterweight, and the vertical pipe is vertically fixed above the upper cover, with a warning light installed at the top of the vertical pipe. An opening is provided on the surface of the counterweight at the bottom of the upper cover, and a horizontal plate is horizontally fixed in the opening. A vertical rod is vertically slidably inserted through the center of the horizontal plate and the outer ring of the counterweight. A base plate is horizontally fixed to the bottom of the vertical rod, located on the outer ring. The system has at least four vertical poles and a base plate. A copper sheet is fixed to the bottom surface of the base plate. The copper sheet in the middle is connected to one pole of the warning light by a wire passing through the vertical tube. All the other copper sheets on the outer ring are connected to the other pole of the warning light by wire passing through the vertical tube. The isolation strip is connected to the side of the vertical tube, and a sleeve is fixed to the end of the isolation strip. A side plate is fixed horizontally on the other side surface of the vertical tube, and a rod is fixed vertically on the surface of the side plate. When the sleeve is fitted onto the outer ring of the rod on the side of another vertical tube, the isolation strip is connected to the side of the other vertical tube.

[0006] By adopting the above technical solution, when the counterweight is supported on the ground, both the base plate in the middle position and the base plate in the outer ring are pressed against the ground by the spring, so that the copper sheet is pressed against the ground surface and has good conductive contact. If there is a live cable in contact with the ground, a potential distribution will be formed on the ground centered on the leakage point. Due to the uneven resistance distribution of the ground, a potential difference will be generated when the current flows on the ground. At this time, there will inevitably be a potential difference between the copper sheet in the middle position and the copper sheet in one of the outer ring positions, so that the warning light will be lit and a warning message will be issued, so as to prevent the test personnel from walking on it without knowing and getting electric shock.

[0007] Optionally, the side surface of the horizontal plate has a through opening, through which the wire connected to the copper sheet passes and upward through the horizontal plate and through the vertical pipe.

[0008] Optionally, springs are fitted around the outer ring of the vertical rod between the base plate, the counterweight, and the horizontal plate, with the bottom of the springs pressing against the surface of the base plate.

[0009] By adopting the above technical solution, the spring will push downward against the base plate, ensuring that the copper sheet makes good contact with the ground.

[0010] Optionally, a limiting plate is fixed to the top of the vertical rod, and the limiting plate is welded and fixed to the top of the vertical rod.

[0011] By adopting the above technical solution, when the counterweight is lifted from the ground, it can prevent the vertical rod from slipping off the counterweight or the horizontal plate when the spring moves downward.

[0012] Optionally, a connecting ring is welded and fixed to the side surface of the vertical pipe, and the isolation strip is connected to the side of the vertical pipe through the connecting ring.

[0013] Optionally, the length of the insertion rod is greater than the length of the sleeve fixed at the end of the isolation strip.

[0014] By adopting the above technical solution, the sleeve is less likely to slip off when it is fitted onto the outer ring of the insert rod.

[0015] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0016] 1. The technical solution of this application installs a warning light on the top of the vertical pipe, and sets copper plates that can be pressed against the ground in the middle position and on the outer ring inside the counterweight base. The copper plates in the middle position and the copper plates on the outer ring are respectively connected to the two poles of the warning light. When a live cable comes into contact with the ground, a potential distribution is formed on the ground centered on the leakage point. The copper plate in the middle position and one of the copper plates in the outer ring will inevitably have a potential difference when directly touched, which will cause the warning light to light up and issue a warning message, which can serve to remind and prevent test personnel from walking on it and getting electric shock.

[0017] 2. The technical solution of this application has a spring fitted around the outer ring of the vertical rod between the base plate and the counterweight seat. The spring will press downward against the base plate, thereby pressing the copper sheet at the bottom of the base plate against the ground to maintain a good release effect. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the external protective device for preventive testing of power equipment according to this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the end of the isolation strip of the external protective device for preventive testing of power equipment and another vertical pipe according to this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the counterweight seat of the external protective device for preventive testing of power equipment according to this utility model.

[0022] In the diagram: 1. Counterweight seat; 11. Upper cover; 111. Horizontal plate; 112. Through hole; 2. Vertical pipe; 3. Connecting ring; 31. Isolation strip; 311. Sleeve; 4. Side plate; 41. Insert rod; 5. Warning light; 6. Vertical rod; 61. Base plate; 611. Copper sheet; 62. Spring; 63. Limiting plate. Detailed Implementation

[0023] Please see Figure 1-3This utility model provides a technical solution: an external protective device for preventive testing of power equipment, including a counterweight 1, a vertical pipe 2 and an isolation belt 31. An upper cover 11 is fixed at the middle position of the surface of the counterweight 1, and the vertical pipe 2 is vertically fixed above the upper cover 11. When in use, the counterweight 1 provides a good counterweight effect and supports the ground, so that the vertical pipe 2 is vertically supported and fixed.

[0024] A connecting ring 3 is welded and fixed to the upper side surface of the vertical pipe 2. The isolation strip 31 is connected to the side of the vertical pipe 2 through the connecting ring 3. A sleeve 311 is fixed to the end of the isolation strip 31. A side plate 4 is horizontally fixed to the other side surface of the vertical pipe 2. A rod 41 is vertically fixed to the surface of the side plate 4. When in use, the isolation strip 31 is pulled out to the side of the other vertical pipe 2. When the sleeve 311 is put on the outer ring of the rod 41 on the side of the other vertical pipe 2, the isolation strip 31 is connected to the side of the other vertical pipe 2. The isolation strip 31 and the vertical pipe 2 work together to achieve the purpose of isolation and protection. The length of the rod 41 is greater than the length of the sleeve 311 fixed to the end of the isolation strip 31. The sleeve 311 is not easy to slip off when it is put on the outer ring of the rod 41. When the device is stored and not in use, the isolation strip 31 can be wrapped around the outer ring of the vertical pipe 2 for storage.

[0025] A warning light 5 is installed at the top of the vertical tube 2. An opening is provided on the surface of the counterweight seat 1 at the bottom of the upper cover 11. A horizontal plate 111 is fixed in the opening. A vertical rod 6 is vertically slidably installed through the middle of the horizontal plate 111 and the outer ring of the counterweight seat 1. A base plate 61 is horizontally fixed at the bottom of the vertical rod 6. At least four vertical rods 6 and base plates 61 are provided on the outer ring. A copper sheet 611 is fixed on the bottom surface of the base plate 61. A spring 62 is fitted on the outer ring of the vertical rod 6 between the base plate 61 and the counterweight seat 1, as well as between the base plate 61 and the horizontal plate 111. The bottom of the spring 62 is pressed against the surface of the base plate 61. When the counterweight seat 1 is placed on the ground, the spring 62 pushes the base plate 61 downward, so that all the copper sheets 611 can make good contact with the ground.

[0026] The copper sheet 611 in the middle position is connected to one electrode of the input terminal of the warning light 5 through a wire passing through the vertical pipe 2. All the other copper sheets 611 in the outer ring are connected to the other electrode of the input terminal of the warning light 5 through wires passing through the vertical pipe 2. A through hole 112 is opened on the side surface of the horizontal plate 111. The wires connected to the copper sheets 611 pass through the through hole 112, pass through the horizontal plate 111, and go upward through the vertical pipe 2. In use, if there is a live cable in contact with the ground, a potential distribution will be formed on the ground centered on the leakage point. Due to the uneven resistance distribution of the ground, a potential difference will be generated when the current flows on the ground. At this time, there will inevitably be a potential difference between the copper sheet 611 in the middle position and one of the copper sheets 611 in the outer ring. Since the copper sheet 611 in the middle position and the other copper sheets 611 in the outer ring are respectively connected to the two electrodes of the warning light 5, the warning light 5 is lit and a warning message is issued.

[0027] In addition, a limiting plate 63 is fixed to the top of each vertical rod 6. The limiting plate 63 is welded and fixed to the top of the vertical rod 6. Therefore, when the counterweight 1 is lifted from the ground, it can prevent the vertical rod 6 from slipping off the perforation on the surface of the counterweight 1 or the horizontal plate 111 and falling off when the spring 62 pushes downward.

[0028] In use, the vertical pipe 2 and its top warning light 5 are supported on the ground by the counterweight 1. Depending on the size of the test site, select an appropriate number of vertical pipes 2 to be supported by the counterweight 1, and adjust the spacing between adjacent vertical pipes 2 to ensure that the sleeve 311 at the end of the isolation strip 31 can fit around the outer ring of the insert 41 on the side of another vertical pipe 2, thus connecting the isolation strip 31 between adjacent vertical pipes 2 for isolation and protection. When the counterweight 1 is supported on the ground, both the base plate 61 in the middle and the base plate 61 on the outer ring are pressed against the ground by the spring 62, causing the copper sheet 611 to be pressed tightly against the ground surface. With good conductive contact, if a live cable comes into contact with the ground during the test, a potential distribution centered on the leakage point will be formed on the ground. Due to the uneven resistance distribution of the ground, a potential difference will be generated when the current flows on the ground. At this time, there will inevitably be a potential difference between the copper sheet 611 in the middle position and one of the copper sheets 611 in one of the outer rings. Since the copper sheet 611 in the middle position and the other copper sheets 611 in the outer ring are respectively connected to the two electrodes of the warning light 5, the warning light 5 will be lit to issue a warning message, so as to prevent the test personnel from walking on it without knowing and getting electric shock.

Claims

1. An external protective device for preventive testing of power equipment, comprising a counterweight (1), a vertical pipe (2), and an isolation strip (31), characterized in that: The counterweight base (1) has an upper cover (11) fixed at the middle position of its surface, and the vertical tube (2) is vertically fixed above the upper cover (11), and a warning light (5) is installed on the top of the vertical tube (2); The counterweight base (1) at the bottom of the upper cover (11) has an opening on its surface. A horizontal plate (111) is fixed in the opening. A vertical rod (6) is vertically slidably installed in the middle of the horizontal plate (111) and the outer ring of the counterweight base (1). A base plate (61) is horizontally fixed at the bottom of the vertical rod (6). There are at least four vertical rods (6) and base plates (61) on the outer ring. A copper sheet (611) is fixed on the bottom surface of the base plate (61). The copper sheet (611) in the middle position is connected to one pole of the warning light (5) through a wire through the vertical tube (2). All the other copper sheets (611) on the outer ring are connected to the other pole of the warning light (5) through a wire through the vertical tube (2). The isolation strip (31) is connected to the side of the vertical pipe (2), and a sleeve (311) is fixed at the end of the isolation strip (31). A side plate (4) is fixed horizontally on the other side surface of the vertical pipe (2), and a rod (41) is fixed vertically on the side surface of the side plate (4). When the sleeve (311) is fitted onto the outer ring of the rod (41) on the side of the other vertical pipe (2), the purpose of connecting the isolation strip (31) with the side of the other vertical pipe (2) is achieved.

2. The external protective device for preventive testing of power equipment according to claim 1, characterized in that: The side surface of the horizontal plate (111) has a through opening (112), and the wire connected to the copper sheet (611) passes through the through opening (112) through the horizontal plate (111) and passes upward through the vertical pipe (2).

3. The external protective device for preventive testing of power equipment according to claim 1, characterized in that: Springs (62) are fitted around the outer ring of the vertical rod (6) between the base plate (61) and the counterweight (1) and between the base plate (61) and the horizontal plate (111), with the bottom of the springs (62) pressing against the surface of the base plate (61).

4. The external protective device for preventive testing of power equipment according to claim 3, characterized in that: A limiting plate (63) is fixed to the top of the vertical rod (6), and the limiting plate (63) is welded and fixed to the top of the vertical rod (6).

5. The external protective device for preventive testing of power equipment according to claim 1, characterized in that: A connecting ring (3) is welded and fixed to the side surface of the vertical pipe (2), and the isolation strip (31) is connected to the side of the vertical pipe (2) through the connecting ring (3).

6. The external protective device for preventive testing of power equipment according to claim 1, characterized in that: The length of the insert (41) is greater than the length of the sleeve (311) fixed at the end of the isolation strip (31).

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