A contact type high precision electrical testing device

Abstract

The present invention discloses a contact type high-precision electric test device, which comprises a fixed base, an electric test component, a detection component, a drive component and a control component; the drive component and the detection component are both mounted on the fixed base; the drive component is used to drive the electric test component to move, so that the electric test hook in the electric test component contacts the contact network; the control component detects the contact network voltage through the high-voltage transformer of the detection component, and uses the secondary discharge of the high-voltage transformer to determine whether the contact network is continuously creeping. The contact type high-precision electric test device proposed by the present invention solves the problems of low detection accuracy of the contact network voltage, the inability of maintenance workers to know the voltage status of the contact network in real time, unreliable contact detection, and safety hazards such as continuous creepage of insulators.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transit detection, and in particular relates to a contact-type high-precision electrical testing device. Background Art

[0002] In the field of rail transit, except for some parts of urban rail transit that use 1800V DC power supply and the third rail 750V DC power supply, other places use rated AC 27.5KV high voltage power supply. Before carrying out roof preparation, inspection, equipment maintenance and other work, it is necessary to perform isolation switch disconnection, power testing, residual power release, grounding and other operations. Among them, power testing and grounding are particularly important.

[0003] At present, after the disconnector is powered off, the electrical testing methods used in the market are divided into non-contact electrical testing and manual contact electrical testing. The electrical testing accuracy of these two electrical testing methods can only reach 13% at most. When there is residual pressure in the contact network or the creepage of the insulator is lower than 13%, it cannot be detected. At this time, the maintenance personnel will assume that the contact network has no power and perform grounding operations, which is dangerous. At the same time, the market currently uses a single detection method to determine whether the contact with the contact network is reliable, and the detection method uses a low-voltage sensor or a limit switch, which cannot meet the insulation requirements of 27.5KV high voltage on the contact network, and there is unreliability. In addition, when there is continuous creepage on the insulator and the voltage is lower than 13% of the contact network voltage, once there is any poor contact in the grounding wire, it will bring danger to the personal safety of the maintenance personnel. Summary of the invention

[0004] In order to solve the technical problems of low operating efficiency and potential safety hazards in existing electrical testing devices, the present invention provides a contact-type high-precision electrical testing device. While solving the problems of electrical testing accuracy and contact reliability, the present invention determines whether there is continuous creepage of insulators, ensures that the voltage of the contact network is detected in real time during the entire operation process, and displays the voltage of the contact network in real time. Maintenance workers can understand the live status of the contact network in real time, thereby ensuring the safety of personnel and improving operating efficiency.

[0005] The present invention is achieved through the following technical solutions:

[0006] A contact type high-precision electrical testing device, the device of the present invention comprises a fixed base, an electrical testing component, a detection component, a driving component and a control component;

[0007] The driving assembly and the detecting assembly are both mounted on the fixed base;

[0008] The driving component is used to drive the electric test component to move, so that the electric test hook in the electric test component contacts the contact network;

[0009] The control component detects the contact network voltage through the high-voltage transformer of the detection component, and determines whether the contact network continues to creep by discharging the secondary side of the high-voltage transformer.

[0010] The present invention realizes contact type electrical testing by automatically controlling the electrical testing hook in the electrical testing component to make contact with the contact network, and transmits the high voltage electricity of the contact network to the high voltage mutual inductor through the high voltage line to convert it into a low voltage signal, and finally sends it to the transmitter and controller of the control component for voltage collection and signal output, thereby realizing contact electrical testing.

[0011] When it is detected that the contact network has a high voltage exceeding the safety grounding requirement, the present invention can determine whether the residual pressure has energy by discharging the residual pressure of the contact network. If the residual pressure is reduced to within the safe grounding voltage after discharge, an instruction for grounding is output. If the voltage remains unchanged after the residual pressure is discharged, a system alarm is issued, indicating that there are safety hazards such as continuous creepage.

[0012] Preferably, the electric test assembly of the present invention comprises an insulating rod, an electric test hook, a bow-shaped hook, a connecting rod fixing bracket, and a connecting rod;

[0013] Wherein, the end of the insulating rod is connected to the driving assembly, the bow-shaped hook is connected to the top of the insulating rod, a hollow hole is provided between the connecting end and the free end of the bow-shaped hook, one end of the electric test hook is rotatably connected to a side of the hollow hole close to the connecting end of the bow-shaped hook, and an elastic component is provided between the bow-shaped hook and the electric test hook;

[0014] The connecting end of the electric test hook is connected to one end of the connecting rod through a connecting block, and the other end of the connecting rod is installed on the connecting rod fixing bracket through a connecting rod bracket, and the connecting rod fixing bracket is installed on the insulating rod;

[0015] During the electrical testing process, first, the insulating rod, driven by the driving component, drives the electrical testing hook to contact the contact network. The electrical testing hook moves clockwise under the pressure of the contact network, and the connecting end of the electrical testing hook compresses the elastic component while driving the connecting rod to move in a straight line. When the contact network falls into the groove of the electrical testing hook, the first detection component on the electrical testing hook collects the contact network contact signal; the electrical testing hook continues to move clockwise, the elastic component continues to be compressed, and the connecting rod continues to move in a straight line until the second detection component at the end of the connecting rod collects the contact in place signal, that is, the insulating rod moves into place, stops driving, and then starts the electrical testing.

[0016] Existing electrical testing devices all use a single detection method to determine whether the contact with the contact network is reliable, and the detection method uses a low-voltage sensor or a limit switch, which cannot meet the insulation requirements of 27.5KV high voltage on the contact network. To address this problem, the present invention adopts a two-stage detection method to perform two-stage detection on the contact between the electrical testing hook and the contact network and the contact between the electrical testing hook and the contact network, thereby improving the detection accuracy and reliability.

[0017] Preferably, the first detection component and the second detection component of the present invention both use optical fiber sensors. The detection component of the present invention uses optical fiber sensors, and there is no insulation problem.

[0018] Preferably, the detection assembly of the present invention comprises a mounting platform, a high-voltage fuse and a high-voltage mutual inductor;

[0019] Wherein, the mounting platform is arranged on the fixed base;

[0020] The high-voltage fuse and the high-voltage transformer are both installed on the installation platform;

[0021] The high-voltage mutual inductor performs a continuity test with the contact network through the high-voltage fuse, the test wire and the test hook.

[0022] Preferably, the detection assembly of the present invention further comprises a fuse mounting bracket and a fuse mounting lug;

[0023] The high-voltage fuse includes an insulator and a high-voltage fuse tube;

[0024] The fuse mounting bracket is connected to the fuse mounting lug fixed on the mounting platform, the insulator is fixed on the fuse mounting lug 27, and the high-voltage fuse tube is connected to the insulator via a connecting bracket.

[0025] Preferably, the driving assembly of the present invention comprises a motor, a push rod, a transmission shaft and a rotating mechanism;

[0026] The motor is mounted on the fixed base through the motor mounting lugs, and the rotating mechanism is connected to the electrical testing assembly;

[0027] The motor drives the transmission shaft to move linearly through the push rod;

[0028] The transmission shaft drives the rotating mechanism to rotate, thereby driving the electrical testing assembly to move, so that the electrical testing hook in the electrical testing assembly contacts the contact network.

[0029] The present invention drives the electric test component to swing by arranging a driving component, so as to realize the electric test by the electric test hook contacting with the contact network.

[0030] Preferably, the drive assembly of the present invention further includes a limit sensor;

[0031] A limit sensor is respectively arranged at the two ends of the push rod.

[0032] Preferably, the control assembly of the present invention comprises a control box;

[0033] The control box is provided with a controller, a discharge resistor and a transmitter;

[0034] The discharge resistor is connected in parallel to the secondary side of the high voltage transformer, the transmitter input end is connected in parallel to the discharge resistor, and the transmitter output end is connected to the input end of the controller.

[0035] Preferably, a display is also provided in the control box of the present invention;

[0036] The display is connected to the output terminal of the controller.

[0037] Preferably, the fixed base of the present invention is a cement column or an H-shaped steel column.

[0038] The present invention has the following advantages and beneficial effects:

[0039] 1. The contact-type high-precision electric testing device proposed in the present invention solves the problems of low accuracy in contact network voltage detection, inability of maintenance personnel to know the contact network voltage status in real time, unreliable contact detection, and continuous creepage of insulators and other safety hazards.

[0040] 2. The voltage accuracy of the voltage test device of the present invention is 2%. The accuracy of the current voltage test devices on the market, whether non-contact voltage test or manual contact voltage test, is greater than 13%. That is, the minimum collection voltage is calculated to be 3575V based on the rated voltage of the contact network 27.5KV, and the residual voltage energy is still very high.

[0041] 3. The present invention adopts a two-stage detection method to detect the contact between the test hook and the contact network and whether the test hook and the contact network are in place, which can improve the detection accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0043] Figure 1 It is a schematic diagram of the principle of the electrical testing device of the present invention.

[0044] Figure 2 It is a schematic diagram of the structure of the electrical testing device of the present invention just in contact with the contact network.

[0045] Figure 3 It is a schematic diagram of the structure in which the electric testing device of the present invention is in good contact with the contact network.

[0046] Figure 4 This is a left view of the structure of the electrical testing device after the electrical testing of the present invention is completed.

[0047] Figure 5 This is a front view of the structure of the electrical testing device after the electrical testing of the present invention is completed.

[0048] Figure 6 For the present invention Figure 2 B's local amplifier.

[0049] Figure 7 For the present invention Figure 2 A partial enlarged view of C.

[0050] Figure 8 For the present invention Figure 2 A partial enlarged view.

[0051] Fig. 9 For the present invention Figure 3 A partial enlarged view of D.

[0052] Fig.10 It is an enlarged view of the electrical testing component of the present invention.

[0053] Fig.11 It is a schematic structural diagram of another specific embodiment of the electric testing device of the present invention in contact with the contact network.

[0054] Marks and corresponding parts names in the attached drawings:

[0055] 1-motor, 2-push rod, 3-rotating shaft, 4-control box, 5-high-voltage fuse, 6-high-voltage mutual inductor, 7-rotating mechanism, 8-insulating swing arm, 9-electricity test hook assembly, 10-connecting rod mechanism, 11-connecting rod fixing bracket, 12-first optical fiber sensor, 13-connecting rod bracket, 14-connecting rod, 15-connecting block, 16-elastic element, 17-fixing pin, 18-bow hook, 19-electricity test hook, 20-mounting lug, 21-mutual inductance limit sensor, 23-motor mounting lug, 24-mounting platform, 25-fuse mounting bracket, 26-insulator, 27-fuse mounting lug, 28-high-voltage fuse tube, 29-second optical fiber sensor, 30-fixing clamp, 31-insulating rod, 33-connecting bracket. DETAILED DESCRIPTION

[0056] Hereinafter, the term "include" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present invention, the terms "include", "have" and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0057] In various embodiments of the present invention, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed at the same time. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0058] The expressions (such as "first", "second", etc.) used in various embodiments of the present invention may modify the various constituent elements in various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing an element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present invention, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0059] It should be noted that if it is described that one component element is “connected” to another component element, the first component element may be directly connected to the second component element, and a third component element may be “connected” between the first component element and the second component element. Conversely, when one component element is “directly connected” to another component element, it can be understood that there is no third component element between the first component element and the second component element.

[0060] The terms used in various embodiments of the present invention are only used for the purpose of describing specific embodiments and are not intended to limit various embodiments of the present invention. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meaning generally understood by those of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in various embodiments of the present invention.

[0061] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0062] Example 1

[0063] Compared with the existing electrical testing devices, which have the problems of low contact network voltage detection accuracy, maintenance personnel cannot know the contact network voltage status in real time, unreliable contact detection, and continuous insulator creepage and other safety hazards, this embodiment proposes a contact-type high-precision electrical testing device for use in the contact network power-off process in the rail transit industry.

[0064] The electrical testing device of this embodiment includes a fixed base, an electrical testing component, a detection component, a driving component and a control component.

[0065] Among them, the driving component and the detection component are both installed on a fixed base; the driving component is used to drive the test component to swing, so that the test hook in the test component contacts the contact network; the primary side of the high-voltage transformer of the detection component is electrically connected to the contact network to collect voltage and transmit it to the control component; the control component detects the contact network voltage through the high-voltage transformer, and detects whether there is continuous creepage in the contact network by discharging the secondary side of the high-voltage transformer.

[0066] When it is detected that the contact network has a high voltage exceeding the safety grounding requirement, the residual voltage of the contact network can be discharged to determine whether the residual voltage has energy. If the residual voltage is reduced to within the safe grounding voltage after discharge, an instruction to ground is output. If the voltage suppression remains unchanged after the residual voltage is discharged, a system alarm is issued, indicating that there are safety hazards such as continuous insulator creepage or the disconnector is not disconnected.

[0067] Specific as Figure 1-6 As shown, the fixed base of this embodiment adopts but is not limited to cement columns or H-shaped steel columns.

[0068] The electrical testing assembly of this embodiment includes an electrical testing insulating rod 8, an electrical testing hook 19 and a bow-shaped hook 18 located on the top of the electrical testing insulating rod 8, a connecting rod mechanism connected to the electrical testing hook 19, an optical fiber sensor 29 for detecting contact with the contact network, an optical fiber sensor 12 for detecting whether contact is in place, and an elastic element 16 arranged between the electrical testing hook 19 and the bow-shaped hook 18.

[0069] The detection assembly of this embodiment includes a high-voltage transformer 6 and a high-voltage fuse 5, and the high-voltage transformer 6 and the high-voltage fuse 5 are both installed on a mounting platform 24, and the mounting platform 24 is fixed on a horizontal column or an H-shaped steel column about 4 meters above the ground.

[0070] The driving assembly of this embodiment includes a driving motor 1 , a push rod 2 , a transmission shaft 3 , a rotating mechanism 7 , and mutual induction limit sensors 21 arranged at the upper and lower ends of the push rod 2 .

[0071] The driving motor 1 is installed on the cement column or H-shaped steel column 1 meter above the ground through the motor mounting lug 23. The transmission shaft 3 is installed parallel to the cement column or H-shaped steel column. The driving motor 1 drives the transmission shaft 3 to perform linear motion through the push rod 2. The transmission shaft 3 drives the rotating mechanism 7 to rotate. The rotating mechanism 7 is installed on the top of the cement column or H-shaped steel at a position about 5 meters above the ground.

[0072] The control assembly of this embodiment includes a control box 4, and a controller, a discharge resistor, and a transmitter are arranged inside the control box 4.

[0073] The transmitter and the discharge resistor are connected in parallel with the secondary side of the high-voltage transformer 6, the output end of the transmitter is connected to the controller, and the optical fiber sensor and the limit sensor are connected to the controller.

[0074] The control box is installed about 1.5 meters away from the concrete column or H-shaped steel column.

[0075] The working process of the electric testing device of this embodiment is as follows:

[0076] At the beginning of the electrical test, the push rod 2 is first driven to rotate by the motor 1, thereby driving the transmission rod 3 to move downward, the transmission rod 3 drives the rotating mechanism 7 to rotate counterclockwise, the rotating mechanism 7 drives the electrical test insulating rod 8 to move counterclockwise, and the electrical test insulating rod 8 drives the electrical test hook 19 to move and contact the contact network; in the process of the electrical test hook 19 continuing to contact with the contact network, under the squeezing of the contact network, the electrical test hook 19 moves clockwise, thereby driving the connecting rod mechanism to move linearly, and the contact network falls into the groove of the electrical test hook 19, and the optical fiber sensor 29 provided on the electrical test hook 19 collects the contact network contact signal; the electrical test hook 19 continues to move clockwise, the elastic element 16 (this embodiment uses but is not limited to a spring) continues to be compressed, and the connecting rod mechanism continues to move linearly until the optical fiber sensor at the end of the connecting rod mechanism collects the contact in place signal; the electrical test insulating rod 8 moves into place, and the motor stops working.

[0077] The high-voltage transformer 6 and the contact network are connected to conduct electricity through the test hook 19, the test wire (which is a high-voltage wire, not shown in the figure) and the high-voltage fuse 5 for electricity testing: the high-voltage transformer 6 sends the voltage value of the contact network to the transmitter in the control box 4, and the transmitter transmits it to the controller for collection. At the same time, if there is electricity in the contact network, it is discharged through the discharge resistor.

[0078] The control box 4 of this embodiment is also provided with an LED display for displaying the detected voltage value.

[0079] The electric power testing device of this embodiment can realize the functions of automatic electric power testing and grounding, improve the intelligence and automation level of electric power testing, and solve the problem that the existing electric power testing device requires manual operation and has potential safety hazards.

[0080] Example 2

[0081] This embodiment further optimizes the detection component in the above embodiment 1, specifically: Figure 7 As shown, the detection assembly of this embodiment includes a mounting platform 24, a fuse mounting bracket 25, an insulator 26, a fuse mounting lug 27, a high-voltage fuse tube 28, a high-voltage transformer 6 and a connecting bracket 33;

[0082] Among them, the high-voltage transformer 6 is installed on the installation platform 24, the fuse mounting bracket 25 is connected to the fuse mounting lug 27 fixed on the installation platform 24, the insulator 26 is fixed on the fuse mounting lug 27, and the high-voltage fuse tube 28 is connected to the insulator 26 through the connecting bracket 33.

[0083] Example 3

[0084] In view of the problem of unreliable detection of contact between the current electric test hook and the contact network in the existing electric test device, this embodiment further optimizes the electric test component.

[0085] Specific as Figure 8-10 As shown, the electrical testing assembly of this embodiment includes an insulating rod 8 , an electrical testing hook 19 , a bow-shaped hook 18 , a connecting rod fixing bracket 11 , a connecting rod 14 , a connecting block 15 and an elastic element 16 .

[0086] The end of the insulating rod 8 is connected to the driving assembly, and the bow-shaped hook 18 is fixedly connected to the top of the insulating rod 8. A hollow hole is provided between the connecting end and the free end of the bow-shaped hook 18. One end of the electric test hook 19 is rotatably connected to one side of the hollow hole close to the connecting end of the bow-shaped hook 18. An elastic component 16 is provided between the bow-shaped hook 18 and the electric test hook 19.

[0087] The connecting end of the electric test hook 19 is connected to one end of the connecting rod 14 through the connecting block 15, and the other end of the connecting rod 14 is installed on the connecting rod fixing bracket 11 through the connecting rod bracket 13, and the connecting rod fixing bracket 11 is installed on the insulating rod 8;

[0088] During the electrical testing process, first, driven by the driving component, the electrical testing hook 19 contacts the contact network, and the electrical testing hook 19 moves clockwise under the squeezing of the contact network. The connecting end of the electrical testing hook 19 compresses the elastic component 16 while driving the connecting rod 14 to move linearly. When the contact network falls into the groove of the electrical testing hook 19, the first optical fiber sensor 29 on the electrical testing hook collects the contact network contact signal; the electrical testing hook 19 continues to move clockwise, the elastic component 16 continues to be compressed, and the connecting rod 14 continues to move linearly until the second optical fiber sensor 12 at the end of the connecting rod 14 collects the contact in place signal, that is, the electrical testing insulating rod 8 moves into place, the motor stops working, and the electrical testing is carried out.

[0089] This embodiment uses a two-stage optical fiber sensor to detect the contact between the test hook 19 and the contact network and whether the test hook is in contact with the contact network. At the same time, the optical fiber sensor does not have insulation problems, which can improve the accuracy and reliability of detection.

[0090] Example 4

[0091] In this embodiment, the detection component and the installation platform in the electric test device proposed in the above embodiment 1 can be directly eliminated, and the entire device is a grounding device. After the electric test hook 19 contacts the contact network, the grounding operation is directly performed. Fig.11 shown.

[0092] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A contact type high precision electrical testing device, characterized in that: The device comprises a fixed base, an electrical testing component, a detection component, a driving component and a control component; The driving assembly and the detecting assembly are both mounted on the fixed base; The driving component is used to drive the electric test component to move, so that the electric test hook (19) in the electric test component contacts the contact network; The primary side of the high-voltage transformer of the detection component is electrically connected to the contact network to collect voltage and transmit it to the control component; The control component detects the contact network voltage through the high-voltage transformer (6) of the detection component, and detects whether there is continuous creepage in the contact network by discharging the secondary side of the high-voltage transformer (6); The detection assembly comprises a mounting platform (24), a high-voltage fuse (5) and a high-voltage transformer (6); Wherein, the mounting platform (24) is arranged on the fixed base; The high-voltage fuse (5) and the high-voltage transformer (6) are both mounted on the mounting platform (24); The control assembly comprises a control box (4); The control box (4) is provided with a controller, a discharge resistor and a transmitter; The discharge resistor and the input end of the transmitter are both connected in parallel to the secondary side of the high-voltage transformer (6), and the output end of the transmitter is connected to the input end of the controller; During the electrical testing process, the driving component drives the electrical testing hook (19) to move so that the electrical testing hook (19) contacts the contact network. During the movement of the electrical testing hook (19), the first detection component is used to detect a signal indicating that the electrical testing hook (19) contacts the contact network. After the first detection component collects the contact signal, the electrical testing hook (19) continues to move, and the second detection component is used to detect a signal indicating that the electrical testing hook (19) contacts the contact network. After the second detection component collects the contact signal, the electrical testing hook (19) stops moving to perform the electrical testing. The high-voltage transformer (6) is connected to the contact network through the high-voltage fuse (5), the test wire and the test hook (19) in the test assembly to test the electricity; the high-voltage transformer (6) transmits the detected contact network voltage to the controller through the transmitter for collection; when it is detected that the contact network voltage exceeds the safe grounding voltage, the residual voltage of the contact network is discharged through the discharge resistor; if the contact network voltage drops to within the safe grounding voltage after the residual pressure is discharged, a grounding instruction is output; if the contact network voltage still exceeds the safe grounding voltage after the residual pressure is discharged, an alarm is issued.

2. A contact type high-precision electrical testing device according to claim 1, characterized in that: The electrical testing assembly comprises an insulating rod (8), an electrical testing hook (19), a bow-shaped hook (18), a connecting rod fixing bracket (11), and a connecting rod (14); The end of the insulating rod (8) is connected to the driving assembly, the bow-shaped hook (18) is connected to the top of the insulating rod (8), a hollow hole is provided between the connecting end and the free end of the bow-shaped hook (18), one end of the electric test hook (19) is rotatably connected to a side of the hollow hole close to the connecting end of the bow-shaped hook (18), and an elastic component (16) is provided between the bow-shaped hook (18) and the electric test hook (19); The connecting end of the electric test hook (19) is connected to one end of the connecting rod (14) via a connecting block (15); the other end of the connecting rod (14) is mounted on the connecting rod fixing bracket (11) via a connecting rod bracket (13); and the connecting rod fixing bracket (11) is mounted on the insulating rod (8); During the electrical testing process, first, the insulating rod (8) is driven by the driving component to drive the electrical testing hook (19) to contact the contact network. The electrical testing hook (19) moves clockwise under the pressure of the contact network. The connecting end of the electrical testing hook (19) compresses the elastic component (16) and drives the connecting rod (14) to move linearly. When the contact network falls into the groove of the electrical testing hook (19), the first detection component on the electrical testing hook collects the contact network contact signal. The electrical testing hook (19) continues to move clockwise, the elastic component (16) continues to be compressed, and the connecting rod (14) continues to move linearly until the second detection component at the end of the connecting rod (14) collects the contact in place signal, that is, the insulating rod (8) moves to the position, stops driving, and then starts the electrical testing.

3. A contact type high-precision electrical testing device according to claim 2, characterized in that: The first detection component and the second detection component both use optical fiber sensors.

4. A contact type high-precision electrical testing device according to claim 1, characterized in that: The detection assembly also includes a fuse mounting bracket (25) and a fuse mounting lug (27); The high-voltage fuse (5) comprises an insulator (26) and a high-voltage fuse tube (28); The fuse mounting bracket (25) is connected to the fuse mounting lug (27) fixed on the mounting platform (24), the insulator (26) is fixed on the fuse mounting lug 27, and the high-voltage fuse tube (28) is connected to the insulator (26) via a connecting bracket (33).

5. A contact type high-precision electrical testing device according to claim 1, characterized in that: The driving assembly comprises a motor (1), a push rod (2), a transmission shaft (3) and a rotating mechanism (7); The motor (1) is mounted on the fixed base via a motor mounting lug (23), and the rotating mechanism (7) is connected to the electrical testing component; The motor (1) drives the transmission shaft (3) to move linearly via the push rod (2); The transmission shaft (3) drives the rotating mechanism (7) to rotate, thereby driving the electrical testing component to move, so that the electrical testing hook (19) in the electrical testing component contacts the contact network.

6. A contact type high precision electrical testing device according to claim 5, characterized in that: The drive assembly further comprises a limit sensor (21); A limit sensor (21) is provided at each end of the push rod (2).

7. A contact type high precision electrical testing device according to claim 1, characterized in that: The control box (4) is also provided with a display; The display is connected to the output terminal of the controller.

8. A contact type high-precision electrical testing device according to any one of claims 1 to 7, characterized in that: The fixed base is a cement column or an H-shaped steel column.

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