Line insulation resistance tester

Abstract

The invention discloses a line insulation resistance tester, which relates to the technical field of seedling cultivation of kumquat, and comprises a protection box, the upper surface of the protection box is provided with a box cover, the inner wall of the protection box is provided with a group of silica gel protection strips, and the protection box is internally provided with an insulation resistance tester body. Through cooperative arrangement of the protection box, the box cover, the insulation resistance tester body, the first wire, the measuring probe, the second wire, the third wire, the air outlet assembly and the air inlet assembly, the second wire and the third wire are connected with a to-be-tested circuit, the measuring probe is used for making contact with the to-be-tested circuit, and insulation resistance testing can be conducted on the circuit; the length of the measuring probe can be adjusted, so that the measuring probe of the tester can stretch out and draw back, the insulation resistance of electrical equipment can be measured in a narrow space, the probe can be in contact with a measuring point conveniently, the insulation resistance tester is convenient to use, and the testing efficiency of the insulation resistance tester can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of kumquat seedling cultivation, in particular to a line insulation resistance tester. Background Art

[0002] A line insulation resistance tester is an instrument specifically used to measure the insulation resistance of electrical lines. As the line is used for a longer period of time, the insulating material will gradually age. The insulation resistance tester can detect changes in the insulation resistance value. When the insulation resistance value drops to a certain level, it indicates that the insulating material may have aged and there may be safety hazards. By regularly using an insulation resistance tester to inspect the line, you can find lines with poor insulation in advance and take measures to repair or replace them, thereby effectively preventing electrical fires, electric shocks and other accidents. It applies a DC voltage to the line being tested, measures the current on the line, and then calculates the insulation resistance value based on Ohm's law. It can accurately measure the resistance value of the insulating part of the electrical line. For example, for high-voltage transmission lines, low-voltage distribution lines, indoor wiring, etc., specific insulation resistance data can be obtained through measurement.

[0003] According to the patent application number 202220944823.X, a high-voltage insulation resistance tester is disclosed, including a base, a box cover is installed on the longer side edge of the top of the base, a protective pad is installed on the inner side of the box cover, a sponge block is slotted at one end of the inner side of the base, a resistance tester body is embedded on the top of the sponge block, a battery compartment is provided at the bottom of the inner side of the base away from the sponge block, one end of the sponge block close to one side of the battery compartment is connected to a test connector, and the top end of the battery compartment is connected to a charging cable.

[0004] The above scheme can effectively protect the high-voltage insulation resistance tester from collision damage caused by bumps during transportation, and at the same time ensure the heat dissipation performance of the high-voltage insulation resistance tester during operation, so that it can be stably operated and used. However, there are still certain defects when using the above scheme. The test probe of the above scheme cannot be retracted when in use. For some special measurement scenarios, such as measuring the insulation resistance of electrical equipment in a small space, the probe of the above scheme may not be able to easily contact the measurement point, resulting in the inconvenience of using the insulation resistance tester, affecting the test efficiency of the insulation resistance tester. To this end, we provide a line insulation resistance tester to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to remedy the deficiencies of the prior art and provide a line insulation resistance tester.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a line insulation resistance tester, comprising a protection box, a box cover is installed on the upper surface of the protection box, a group of silicone protection strips are installed on the inner wall of the protection box, an insulation resistance tester body is arranged inside the protection box, a fixing component is installed inside the protection box, a wire 1 is installed on the upper surface of the insulation resistance tester body, a measuring probe is installed at one end of the wire 1 away from the insulation resistance tester body, and the measuring probe includes a receiving A storage tube, a group of anti-slip strips are installed on the outer surface of the storage tube, an extension tube is slidably connected to the inner wall of the storage tube, a test probe is installed on the end of the extension tube, a protective soft board is installed on the inner wall of the box cover, a wire two and a wire three are installed on the upper surface of the insulation resistance tester body, the top of the wire two and the top of the wire three are both located between the box cover and the protective soft board, two air outlet assemblies are installed on the right side of the protection box, two air inlet assemblies are installed on the left side of the protection box, and two containing frames are installed on the inner wall of the protection box, and the containing frames are adapted to the storage tube.

[0007] Furthermore, the fixing assembly includes a threaded rod threadedly connected to the right side surface of the protective box, a rotating block is installed at the right end of the threaded rod, a clamping plate is rotatably connected to the left end of the threaded rod, a group of rubber strips are installed on the outer surface of the clamping plate, and the rubber strips are in contact with the outer surface of the insulation resistance tester body.

[0008] Furthermore, the fixing assembly also includes two slide grooves opened on the inner bottom wall of the protection box, and the inner walls of the two slide grooves are slidably connected with sliders, and the sliders are connected to the clamping plate.

[0009] Furthermore, a guide groove 1 is provided on the inner wall of the storage tube, a guide block 1 is slidably connected to the inner wall of the guide groove 1, and the guide block 1 is connected to the extension tube.

[0010] Furthermore, a conductive tube is provided inside the storage tube, and the conductive tube is connected to the wire 1. A conductive rod is slidably connected to the inner wall of the conductive tube, and one end of the conductive rod away from the wire 1 is connected to the test probe.

[0011] Furthermore, a limiting cylinder is fixedly embedded on the outer surface of the storage cylinder, a group of limiting grooves are opened on the outer surface of the extension tube, the inner wall of the limiting cylinder is slidably connected with a connecting plate, the bottom surface of the connecting plate is installed with a limiting plate, and the bottom end of the limiting plate is clamped with the inner wall of the limiting groove.

[0012] Furthermore, a pull rod is installed on the upper surface of the connecting plate, a pull ring is installed on the top of the pull rod, a spring is sleeved on the outer surface of the pull rod, and both ends of the spring are respectively connected to the upper surface of the connecting plate and the inner top wall of the limiting cylinder.

[0013] Furthermore, the inner wall of the limiting cylinder is provided with two guide grooves 2, the inner walls of the two guide grooves 2 are both slidably connected with guide blocks 2, and the guide blocks 2 are connected to the connecting plate.

[0014] Furthermore, the air outlet assembly includes an air outlet duct located on the right side of the protective box, two mounting plates are installed on the outer surface of the air outlet duct, and the two mounting plates are connected to the protective box through mounting bolts. A protective net is installed on the inner wall of the air outlet duct, and a cooling fan is installed inside the air outlet duct.

[0015] Furthermore, the air inlet assembly includes an air inlet frame located on the left side of the protective box, a filter is installed on the inner wall of the air inlet frame, and two mounting plates 2 are installed on the outer surface of the air inlet frame. Both mounting plates 2 are connected to the protective box through two mounting bolts 2.

[0016] Compared with the prior art, the line insulation resistance tester has the following beneficial effects: The present invention connects the wire 2 and the wire 3 to the circuit to be tested through the coordinated arrangement of a protection box, a box cover, an insulation resistance tester body, a wire 1, a measuring probe, a wire 2, a wire 3, an air outlet assembly and an air inlet assembly, and uses the measuring probe to contact the circuit to be tested so as to perform an insulation resistance test on the circuit. The length of the measuring probe can be adjusted so that the measuring probe of the tester can be extended and retracted, and the insulation resistance of electrical equipment can be measured in a small space, so that the probe can conveniently contact the measuring point, so that the insulation resistance tester is easy to use and the testing efficiency of the insulation resistance tester can be guaranteed.

[0017] The present invention cooperates with an insulation resistance tester body, a measuring probe, a storage tube, an extension tube, a test probe, a conductive tube, a conductive rod, a limit tube, a limit groove, a connecting plate, a limit plate, a pull rod, a pull ring and a spring. The pull ring is pulled upward to drive the pull rod to move upward, thereby driving the connecting plate and the limit plate to move upward. The limit plate is disengaged from the interior of the limit groove to release the limit between the storage tube and the extension tube. The extension tube is pulled out from the interior of the storage tube, which can change the position of the test probe. After the position between the storage tube and the extension tube is adjusted, the pull ring is released, and the elastic force of the spring resets the limit plate, and the storage tube and the extension tube are limited again, so that the length of the measuring probe can be adjusted, the measuring probe can be used conveniently to test the circuit, and the insulation resistance of electrical equipment in a small space can be conveniently measured.

[0018] The present invention cooperates with a protective box, an insulation resistance tester body, an air outlet duct, a mounting plate 1, a mounting bolt 1, a protective net, a cooling fan, an air inlet frame, a filter, a mounting plate 2 and a mounting bolt 2. The cooling fan inside the air outlet duct can draw the air inside the protective box through the air outlet duct, and can allow external air to enter the interior of the protective box through the air inlet frame, so that the air inside the protective box can be easily replaced, and the heat generated by the insulation resistance tester body when working can be easily dissipated, thereby ensuring the working stability of the insulation resistance tester body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the right view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the air outlet duct of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the left view of the present invention; Figure 4 It is a schematic diagram of the internal structure of the protection box of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the measuring probe of the present invention; Figure 6 It is a schematic diagram of the internal structure of the storage tube of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the structure enlargement in the middle; Figure 8 For the present invention Figure 6 Schematic diagram of the local structure.

[0020] In the figure: 1. Protective box; 2. Box cover; 3. Silicone protective strip; 4. Insulation resistance tester body; 5. Fixing assembly; 501. Threaded rod; 502. Rotating block; 503. Clamping plate; 504. Rubber strip; 505. Slide; 506. Slider; 6. Wire 1; 7. Measuring probe; 701. Storage tube; 702. Anti-slip strip; 703. Extension tube; 704. Guide groove 1; 705. Guide block 1; 706. Test probe; 707. Conductive tube; 708. Conductive rod; 709. Limiting tube; 710. Limiting groove; 711, connecting plate; 712, limiting plate; 713, pulling rod; 714, pulling ring; 715, spring; 716, second guide groove; 717, second guide block; 8, protective soft board; 9, second wire; 10, third wire; 11, air outlet assembly; 111, air outlet duct; 112, first mounting plate; 113, first mounting bolt; 114, protective net; 115, cooling fan; 121, air inlet frame; 122, filter; 123, second mounting plate; 124, second mounting bolt; 12, air inlet assembly; 13, containing frame. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Embodiment 1

[0023] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a line insulation resistance tester includes a protection box 1, a box cover 2 is installed on the upper surface of the protection box 1, a group of silicone protective strips 3 are installed on the inner wall of the protection box 1, an insulation resistance tester body 4 is arranged inside the protection box 1, and a fixing component 5 is installed inside the protection box 1. The fixing component 5 includes a threaded rod 501 threadedly connected to the right side of the protection box 1, a rotating block 502 is installed on the right end of the threaded rod 501, and a clamping plate 503 is rotatably connected to the left end of the threaded rod 501. A group of rubber strips 504 arranged at equal distances are installed on the outer surface of the clamping plate 503, and the rubber strips 504 are in contact with the outer surface of the insulation resistance tester body 4. The fixing component 5 also includes two symmetrical slide grooves 505 opened on the inner bottom wall of the protection box 1, and the inner walls of the two slide grooves 505 are slidably connected with sliders 506, and the slider 506 is connected to the clamping plate 503. There is a conductor 6, and a measuring probe 7 is installed at the end of the conductor 6 away from the insulation resistance tester body 4. The measuring probe 7 includes a storage tube 701 installed at the end of the conductor 6 away from the insulation resistance tester body 4, and a group of anti-slip strips 702 in a circular array are installed on the outer surface of the storage tube 701. The inner wall of the storage tube 701 is slidably connected with an extension tube 703, and a test probe 706 is installed at the end of the extension tube 703. A protective soft board 8 is installed on the inner wall of the box cover 2, and a conductor 2 9 and a conductor 3 10 are installed on the upper surface of the insulation resistance tester body 4. The top of the conductor 2 9 and the top of the conductor 3 10 are both located between the box cover 2 and the protective soft board 8. Two symmetrical air outlet components 11 are installed on the right side of the protection box 1, and two symmetrical air inlet components 12 are installed on the left side of the protection box 1. Two symmetrical containing frames 13 are installed on the inner wall of the protection box 1, and the containing frames 13 are adapted to the storage tube 701.

[0024] In this embodiment, the protective box 1 and the box cover 2 are hinged by two hinges, and a common locking mechanism on the market is installed between the protective box 1 and the box cover 2, which can conveniently lock the box cover 2 and the protective box 1, and conveniently protect the insulation resistance tester body 4 inside the protective box 1. The provided silicone protective strip 3 can conveniently protect the insulation resistance tester body 4. A threaded hole compatible with the threaded rod 501 is provided on the right side of the protective box 1, so that the outer surface of the threaded rod 501 can be threadedly connected with the inner wall of the threaded hole. A circle of anti-slip grooves is provided on the outer surface of the rotating block 502, which can increase the friction force on the surface of the rotating block 502 and facilitate the rotation of the rotating block 502. A bearing is fixedly embedded on the outer surface of the clamping plate 503, so that the threaded rod The end of 501 is connected to the inner ring of the bearing, which can ensure the rotation accuracy of the threaded rod 501. When the threaded rod 501 drives the clamping plate 503 to move, the slider 506 can slide on the inner wall of the slide groove 505, which can guide and limit the clamping plate 503 and ensure the stability of the clamping plate 503 when moving. The anti-slip strip 702 can be used to increase the friction force on the outer surface of the storage tube 701, so that the storage tube 701 can be conveniently operated by hand. The protective soft board 8 can be used to form a storage space between the protective soft board 8 and the box cover 2, so that tools can be conveniently stored. The end of the wire 2 9 away from the insulation resistance tester body 4 and the end of the wire 3 10 away from the insulation resistance tester body 4 are both installed with wiring clamps, which is convenient for wiring testing of the circuit.

[0025] The working steps of this embodiment are as follows: like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, when the tester is used to test the circuit, the tester is first carried to the test site, and after the box cover 2 is opened, the wire 2 9 and the wire 3 10 are connected to the circuit to be tested, and the length of the measuring probe 7 is adjusted according to the position of the test circuit, so that the measuring probe 7 can be conveniently adapted to the position of the circuit for measurement, and the circuit can be tested and detected by observing the display screen data on the upper surface of the insulation resistance tester body 4. The air outlet component 11 and the air inlet component 12 can be used to conveniently dissipate heat inside the protective box 1, thereby conveniently dissipating heat for the insulation resistance tester body 4, and the working stability of the insulation resistance tester body 4 can be ensured. Embodiment 2

[0026] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the inner wall of the storage cylinder 701 is provided with a guide groove 704, the inner wall of the guide groove 704 is slidably connected with a guide block 705, and the guide block 705 is connected to the extension tube 703, the interior of the storage cylinder 701 is provided with a conductive tube 707, and the conductive tube 707 is connected to the wire 6, the inner wall of the conductive tube 707 is slidably connected with a conductive rod 708, and the end of the conductive rod 708 away from the wire 6 is connected to the test probe 706, the outer surface of the storage cylinder 701 is fixedly inlaid with a limiting cylinder 709, the outer surface of the extension tube 703 is provided with a group of equidistantly arranged limiting grooves 710, the inner wall of the limiting cylinder 709 is slidably connected to the test probe 706, and the inner wall of the limiting cylinder 709 is slidably connected to the test probe 706. There is a connecting plate 711, a limiting plate 712 is installed on the bottom surface of the connecting plate 711, and the bottom end of the limiting plate 712 is clamped with the inner wall of the limiting groove 710, a pull rod 713 is installed on the upper surface of the connecting plate 711, a pull ring 714 is installed on the top of the pull rod 713, a spring 715 is sleeved on the outer surface of the pull rod 713, and the two ends of the spring 715 are respectively connected to the upper surface of the connecting plate 711 and the inner top wall of the limiting cylinder 709, the inner wall of the limiting cylinder 709 is provided with two symmetrical guide grooves 716, the inner walls of the two guide grooves 716 are slidably connected with guide blocks 717, and the guide blocks 717 are connected to the connecting plate 711.

[0027] In this embodiment, the end of the extension tube 703 passes through the inner wall of the storage tube 701 and extends to the outside of the storage tube 701, and the outer surface of the extension tube 703 is slidably connected to the penetration point of the storage tube 701. When the extension tube 703 slides on the inner wall of the storage tube 701, the guide block 705 can slide on the inner wall of the guide groove 704, so as to guide and limit the extension tube 703, and ensure the stability of the extension tube 703 when moving. The conductive tube 707 is electrically connected to the test probe 706, and the conductive rod 708 is electrically connected to the test probe 706. When the conductive rod 708 slides on the inner wall of the conductive tube 707, it can ensure that the conductive tube 707 and the conductive rod 708 are in contact with each other. In order to realize electrical connection, an installation groove compatible with the limiting cylinder 709 is provided on the outer surface of the storage cylinder 701, so that the limiting cylinder 709 can be installed on the inner wall of the installation groove, and a through hole compatible with the pull rod 713 is provided on the upper surface of the limiting cylinder 709, so that the top end of the pull rod 713 can pass through the inside of the through hole and extend to the outside of the limiting cylinder 709. The spring 715 is sleeved on the outer surface of the pull rod 713, and the spring 715 does not contact the pull rod 713. When the connecting plate 711 slides on the inner wall of the limiting cylinder 709, the guide block 717 can slide on the inner wall of the guide groove 716, so as to guide and limit the connecting plate 711, and ensure the stability of the connecting plate 711 when moving.

[0028] The working steps of this embodiment are as follows: like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, when it is necessary to adjust the length of the measuring probe 7, first take out the storage tube 701 from the inside of the containing frame 13, then pull the pull ring 714 upwards, the pull ring 714 can drive the pull rod 713 to move upwards, thereby driving the connecting plate 711 and the limiting plate 712 to move upwards, compressing the spring 715, so that the limiting plate 712 can be separated from the inside of the limiting groove 710, and the limiting between the storage tube 701 and the extension tube 703 can be released, and the extension tube 703 can be pulled out from the inside of the storage tube 701, so as to change the length of the measuring probe 7. 06, and after adjusting the position between the storage tube 701 and the extension tube 703, release the pull ring 714, and under the elastic force of the spring 715, the connecting plate 711 and the limiting plate 712 can be reset, so that the limiting plate 712 can be re-inserted into the limiting groove 710, and the storage tube 701 and the extension tube 703 can be limited again, and the length of the measuring probe 7 can be adjusted, so that the measuring probe 7 can be used to test the circuit conveniently, and the insulation resistance of electrical equipment in a small space can be measured conveniently. Embodiment 3

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the air outlet assembly 11 includes an air outlet duct 111 located on the right side of the protective box 1, two symmetrical mounting plates 112 are installed on the outer surface of the air outlet duct 111, and the two mounting plates 112 are connected to the protective box 1 through mounting bolts 113, a protective net 114 is installed on the inner wall of the air outlet duct 111, and a cooling fan 115 is installed inside the air outlet duct 111. The air inlet assembly 12 includes an air inlet frame 121 located on the left side of the protective box 1, a filter 122 is installed on the inner wall of the air inlet frame 121, two symmetrical mounting plates 123 are installed on the outer surface of the air inlet frame 121, and the two mounting plates 123 are connected to the protective box 1 through two symmetrical mounting bolts 124.

[0030] In this embodiment, a mounting groove matched with the air outlet pipe 111 is opened on the right side of the protection box 1, so that the air outlet pipe 111 can be installed on the inner wall of the mounting groove, so that the air outlet pipe 111 is connected with the interior of the protection box 1, and a mounting hole matched with the mounting bolt 113 is opened on the right side of the protection box 1, so that the mounting plate 112 can be easily installed using the mounting bolt 113, so that the air outlet pipe 111 can be easily installed. The protective net 114 is provided to prevent foreign matter from entering the interior of the protection box 1 from the air outlet pipe 111. The cooling fan 115 is installed on the inner wall of the air outlet pipe 111 through the mounting block. A mounting groove compatible with the air inlet frame 121 is opened on the left side of the protective box 1, so that the air inlet frame 121 can be installed on the inner wall of the mounting groove, so that the air inlet frame 121 is connected with the interior of the protective box 1. A mounting hole compatible with the mounting bolt 2 124 is opened on the left side of the protective box 1, and the mounting plate 2 123 can be conveniently installed using the mounting bolt 2 124, so that the air inlet frame 121 can be conveniently installed. The filter 122 is provided to filter the air entering the interior of the protective box 1 to prevent dust in the air from entering the interior of the protective box 1 through the air outlet assembly 11 and causing damage to the insulation resistance tester body 4.

[0031] The working steps of this embodiment are as follows: like Figure 1 , Figure 2 and Figure 3 As shown, when the tester is in use, the cooling fan 115 inside the air outlet duct 111 is started, and the cooling fan 115 can draw the air inside the protective box 1 through the air outlet duct 111, and allow the external air to enter the interior of the protective box 1 through the air inlet frame 121, so as to facilitate the replacement of the air inside the protective box 1 and the dissipation of the heat generated by the insulation resistance tester body 4 during operation, thereby ensuring the working stability of the insulation resistance tester body 4.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] It should be noted that the standard parts used in the present invention can all be purchased from the market, special-shaped parts can be customized according to the instructions and drawings, and the specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the inventor will not elaborate here.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A line insulation resistance tester, comprising a protection box (1), characterized in that: The upper surface of the protection box (1) is installed with a box cover (2), the inner wall of the protection box (1) is installed with a group of silicone protective strips (3), the interior of the protection box (1) is provided with an insulation resistance tester body (4), the interior of the protection box (1) is installed with a fixing component (5), the upper surface of the insulation resistance tester body (4) is installed with a wire 1 (6), the end of the wire 1 (6) away from the insulation resistance tester body (4) is installed with a measuring probe (7), the measuring probe (7) comprises a storage tube (701) installed at the end of the wire 1 (6) away from the insulation resistance tester body (4), the outer surface of the storage tube (701) is installed with a group of anti-slip strips (702), the storage tube ( The inner wall of the protective box (701) is slidably connected to an extension tube (703), and a test probe (706) is installed at the end of the extension tube (703). The inner wall of the box cover (2) is installed with a protective soft board (8). The upper surface of the insulation resistance tester body (4) is installed with a second conductor (9) and a third conductor (10), and the top of the second conductor (9) and the top of the third conductor (10) are both located between the box cover (2) and the protective soft board (8). Two air outlet components (11) are installed on the right side of the protective box (1), and two air inlet components (12) are installed on the left side of the protective box (1). Two containing frames (13) are installed on the inner wall of the protective box (1), and the containing frames (13) are compatible with the storage tube (701).

2. A line insulation resistance tester according to claim 1, characterized in that: The fixing assembly (5) comprises a threaded rod (501) threadedly connected to the right side surface of the protection box (1), a rotating block (502) is installed at the right end of the threaded rod (501), and a clamping plate (503) is rotatably connected to the left end of the threaded rod (501), and a group of rubber strips (504) are installed on the outer surface of the clamping plate (503), and the rubber strips (504) are in contact with the outer surface of the insulation resistance tester body (4).

3. A line insulation resistance tester according to claim 2, characterized in that: The fixing assembly (5) further comprises two slide grooves (505) formed on the inner bottom wall of the protection box (1), the inner walls of the two slide grooves (505) being slidably connected with a slider (506), and the slider (506) is connected to the clamping plate (503).

4. A line insulation resistance tester according to claim 1, characterized in that: The inner wall of the storage tube (701) is provided with a guide groove 1 (704), the inner wall of the guide groove 1 (704) is slidably connected with a guide block 1 (705), and the guide block 1 (705) is connected to the extension tube (703).

5. A line insulation resistance tester according to claim 1, characterized in that: A conductive tube (707) is provided inside the storage tube (701), and the conductive tube (707) is connected to the first wire (6). A conductive rod (708) is slidably connected to the inner wall of the conductive tube (707), and an end of the conductive rod (708) away from the first wire (6) is connected to the test probe (706).

6. A line insulation resistance tester according to claim 1, characterized in that: A limiting cylinder (709) is fixedly embedded on the outer surface of the storage cylinder (701), a group of limiting grooves (710) are opened on the outer surface of the extension tube (703), a connecting plate (711) is slidably connected to the inner wall of the limiting cylinder (709), a limiting plate (712) is installed on the bottom surface of the connecting plate (711), and the bottom end of the limiting plate (712) is snap-fitted to the inner wall of the limiting groove (710).

7. A line insulation resistance tester according to claim 6, characterized in that: A pull rod (713) is installed on the upper surface of the connecting plate (711), a pull ring (714) is installed on the top end of the pull rod (713), a spring (715) is sleeved on the outer surface of the pull rod (713), and two ends of the spring (715) are respectively connected to the upper surface of the connecting plate (711) and the inner top wall of the limiting cylinder (709).

8. A line insulation resistance tester according to claim 6, characterized in that: The inner wall of the limiting cylinder (709) is provided with two second guide grooves (716), the inner walls of the two second guide grooves (716) are both slidably connected with second guide blocks (717), and the second guide blocks (717) are connected to the connecting plate (711).

9. A line insulation resistance tester according to claim 1, characterized in that: The air outlet assembly (11) comprises an air outlet pipe (111) located on the right side of the protective box (1); two mounting plates (112) are installed on the outer surface of the air outlet pipe (111); the two mounting plates (112) are connected to the protective box (1) via mounting bolts (113); a protective net (114) is installed on the inner wall of the air outlet pipe (111); and a cooling fan (115) is installed inside the air outlet pipe (111).

10. A line insulation resistance tester according to claim 1, characterized in that: The air inlet assembly (12) comprises an air inlet frame (121) located on the left side of the protective box (1), a filter screen (122) being installed on the inner wall of the air inlet frame (121), and two mounting plates (123) being installed on the outer surface of the air inlet frame (121), and the two mounting plates (123) are connected to the protective box (1) via two mounting bolts (124).

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