Portable detection equipment for electrical signal fault diagnosis

Abstract

The invention discloses a portable detection device for electrical signal fault diagnosis, which comprises a meter body, a positioning frame and a control mechanism, and is characterized in that the meter body is provided with a fixed jaw and a movable jaw which are buckled with each other; the positioning frame slides along a locking groove in the meter body, a supporting rod with the end abutting against the inner side of the movable jaw is transversely connected to the positioning frame in a sliding mode, and a supporting spring is installed at the end, away from the movable jaw, of the supporting rod. The control mechanism comprises a telescopic piece installed on the meter body and a locking cylinder installed on the positioning frame. When electrical fault diagnosis is carried out, the fixed jaw and the movable jaw which are buckled are controlled to move, a circuit is pushed to the center line of the fixed jaw and the movable jaw, the detection accuracy of the circuit is improved, the outer wall of the deformed elastic belt makes contact with the supporting rod on the side face, the position of the movable jaw is locked, and the detection accuracy of the circuit is improved. And the counter-acting force of the circuit is not easy to push the movable jaw to displace so as not to be in contact with the fixed jaw.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical fault detection, and in particular to a portable detection device for electrical signal fault diagnosis. Background Art

[0002] Electrical circuit testing is mainly based on the observation of physical phenomena such as heat, sound, and electricity during the operation of electrical equipment. The electrical circuits are tested using instruments and equipment to detect electrical circuit faults in a timely manner and avoid safety hazards.

[0003] In the prior art, the Chinese invention patent with publication number CN115586478A discloses a portable electrical circuit detection device, comprising a lower half shell and an upper half shell, wherein a screen cover is embedded in the top of the front side of the upper half shell, and a button mounting frame is installed through the bottom of the front side of the upper half shell; the portable device is used to detect the electrical circuit to achieve the purpose of rapid circuit detection; in addition, when performing circuit detection, a clamp-type ammeter is usually carried to detect the circuit, such as the Chinese patent with publication number CN218158033U discloses a clamp-type ammeter, comprising a shell, a clamping assembly and a protective cover, A jaw is installed above the shell, and a jaw end is provided at the connection of the jaws. A protective cover is provided on the outside of the jaw end. A clamping assembly is fixedly installed at the connection between the jaws and the shell, and a limit bolt is fixedly installed on the clamping assembly. When in use, the jaws are buckled together and put on the circuit to be tested. Using the principle of electromagnetic induction, when the jaws are closed and surround the conductor to be tested, the alternating current in the conductor will generate an alternating magnetic field. This alternating magnetic field passes through the iron core and induces a small current in the secondary coil wound on the iron core. The corresponding current size is detected by the ammeter, thereby achieving the purpose of detecting the conductor to be tested.

[0004] In order to improve measurement accuracy, it is usually necessary to ensure that the jaws are completely closed and the wire is located as close as possible in the center of the jaws. When the above solution is implemented, in order to improve the versatility of the jaws of the clamp-on ammeter, the inner diameter of the jaws after closing is usually larger than the diameter of the circuit to be measured. In particular, for some circuits with smaller wire diameters, the wires will completely deviate from the center position of the jaws. During testing, the ammeter needs to be held in hand to continuously adjust the position of the jaws, which makes the testing operation very inconvenient and affects the accuracy of the test results. Summary of the Invention

[0005] Based on this, it is necessary to provide a portable detection device for electrical signal fault diagnosis in response to the above technical problems, so as to solve the problem in the prior art that in order to improve the versatility of the jaws of the clamp-on ammeter, the inner diameter of the jaws is usually larger than the diameter of the circuit to be tested after closing. In particular, for some lines with smaller wire diameters, the wires will completely deviate from the center position of the jaws. During the test, the handheld ammeter needs to be continuously adjusted to the position of the jaws, which makes the test operation very inconvenient and affects the accuracy of the test results.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A portable detection device for electrical signal fault diagnosis, comprising: A meter body, wherein the meter body is provided with a fixed jaw and a movable jaw that are interlocked with each other, the fixed jaw and the movable jaw that are interlocked with each other form a closed annular body, and a locking groove is vertically opened on the meter body; A positioning frame, the positioning frame slides along the locking groove on the watch body, the fixed jaw is installed with the positioning frame through the mounting shaft 1 and the mounting shaft 2, the movable jaw is rotatably connected with the positioning frame through the mounting shaft 1, a support rod with an end portion abutting against the inner side of the movable jaw is laterally slidably connected to the positioning frame, and a support spring is installed at the end of the support rod away from the movable jaw; The control mechanism includes a telescopic part installed on the watch body and a locking cylinder installed on the positioning frame. The output end of the telescopic part passes through the positioning frame and is connected to the top of the inner cavity of the telescopic part. A surrounding elastic band is embedded in the outer ring of the locking cylinder, and the elastic band corresponds to the support rod.

[0007] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, the elastic band is made of elastic material. When under pressure, the elastic band is deformed into an outward convex shape and the outer wall abuts against the support rod. The inner sides of the docking ends of the fixed jaw and the movable jaw are provided with blocking pads.

[0008] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, the inner cavity of the locking cylinder is respectively installed with an air pressure sensor and a proximity switch corresponding to the top of the locking cylinder, and the side wall of the locking cylinder is installed with an electromagnetic valve.

[0009] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, a positioning controller, a positioning button and a release button are provided on the meter body, and a positioning module and an analysis module are provided on the positioning controller. The positioning module is respectively connected to the analysis module, the positioning button, the release button and the telescopic part signal, and the analysis module is respectively connected to the proximity switch, the air pressure sensor and the solenoid valve signal.

[0010] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, it also includes an adjustment mechanism, which includes a push plate slidingly connected to the positioning frame along the axial direction of the movable jaw, and a control cylinder installed with the positioning frame. The support rod is plugged into the push plate, and the support spring is installed between the front end of the support rod and the push plate. The control cylinder is plugged into a control piston with a front end connected to the push plate.

[0011] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, a pressure sensor is installed at the connection between the regulating piston and the push plate, an air pressure regulating component is connected to the regulating cylinder, and an adjusting module is also provided on the positioning controller, and the adjusting module is respectively connected to the analysis module, the air pressure regulating component and the pressure sensor signal.

[0012] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, the air pressure control component includes an air tank connected to the locking cylinder through a pipe, and two air pressure sensors installed in the inner cavity of the air tank. An electromagnetic valve is installed on the pipe between the locking cylinder and the air tank, and the air tank is connected to the inner cavity of the control cylinder through a pipe.

[0013] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, the adjustment module is respectively connected to the signals of the second solenoid valve and the second air pressure sensor.

[0014] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, two support rods are provided, and the support rods are respectively located on both sides of the elastic band of the annular structure.

[0015] As a preferred embodiment of the portable detection device for electrical signal fault diagnosis provided by the present invention, the outer ring of the elastic band is coated with an anti-slip coating, and the outer ring of the support rod corresponding to the elastic band is coated with an anti-slip coating.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a portable detection device for electrical signal fault diagnosis, which controls the engagement of the movable jaw and the fixed jaw to realize the detection of the circuit to be tested. After engagement, the positioning frame is controlled to move, and the engaged fixed jaw and movable jaw are driven to move toward the main body of the meter body. During the movement of the fixed jaw and the movable jaw, the circuit is clamped and pushed to the center line of the fixed jaw and the movable jaw, thereby reducing the deviation of the circuit and improving the detection accuracy of the circuit. The outer wall of the deformed elastic band contacts the side support rod, thereby limiting the movement of the support rod and then locking the position of the movable jaw. When the movable jaw continues to press down on the circuit, the reaction force of the circuit is not easy to push the movable jaw to displace and disconnect from the fixed jaw, so that the movable jaw and the fixed jaw can always be tightly engaged.

[0017] 2. The present invention provides a portable detection device for electrical signal fault diagnosis. By setting a positioning controller and using a positioning module to control the displacement of a positioning frame, the position of the fixed jaw and the movable jaw can be automatically controlled. The analysis module can be used to determine the clamping state of the movable jaw and the fixed jaw on the circuit, and the elastic band can be deformed to lock the position of the support rod. When the movable jaw and the fixed jaw are positioned on the circuit, the movable jaw is not easily opened by the reaction force of the circuit, thereby improving the detection accuracy of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the overall structure provided by the present invention; Figure 2 The main view provided by the present invention; Figure 3 A schematic diagram of the cross-sectional structure of the meter body provided by the present invention; Figure 4 This is a structural diagram of the positioning frame provided by the present invention after it moves downward; Figure 5 A schematic diagram of the positioning frame and control mechanism structure provided by the present invention; Figure 6 A schematic diagram of the control mechanism structure provided by the present invention; Figure 7 A partial structural cross-sectional view of the control mechanism provided by the present invention; Figure 8 This is a structural schematic diagram of the elastic band bulging outward after the locking cylinder is compressed provided by the present invention; Figure 9This is a schematic diagram of the overall structure of the locking cylinder provided by the present invention when the elastic band bulges outward after compression; Figure 10 A control principle block diagram of the positioning controller provided by the present invention; Figure 11 A schematic diagram of the locking cylinder compression and solenoid valve opening structure provided by the present invention; Figure 12 This is a schematic diagram of the top view of the elastic band provided by the present invention when it is convex.

[0020] The markings in the figure are as follows: 1. Meter body; 2. Fixed jaw; 3. Moving jaw; 4. Locking slot; 5. Positioning button; 6. Release button; 7. Spacer block; 8. Positioning frame; 9. Telescopic member; 10. Mounting shaft 1; 11. Mounting shaft 2; 12. Locking cylinder; 13. Support rod; 14. Support spring; 15. Elastic band; 16. Gas tank; 17. Control cylinder; 18. Control piston; 19. Proximity switch; 20. Air pressure sensor 1; 21. Solenoid valve 2; 22. Air pressure sensor 2; 23. Pressure sensor; 24. Push plate; 25. Solenoid valve 1. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other unless there is any conflict.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings. Example 1

[0024] Please refer to Figures 1-9, a portable detection device for electrical signal fault diagnosis, including a meter body 1, a positioning frame 8 and a control mechanism, the meter body 1 is provided with a fixed jaw 2 and a movable jaw 3 that are interlocked with each other, and the fixed jaw 2 and the movable jaw 3 that are interlocked with each other form a closed ring body, and the circuit is connected by controlling the movable jaw 3 and the fixed jaw 2 to be closed, which is convenient for detecting the circuit, and the current detection component provided in the meter body 1 is used to detect the size of the induced current in the fixed jaw 2 and the movable jaw 3, thereby detecting the size of the circuit to be tested, which is convenient for detecting and troubleshooting faults of electrical equipment. The current detection component in the meter body 1 is a public prior art, which is a component commonly used in clamp-on ammeters for detecting the size of the induced current in the closed loop of the jaws. It is a prior art well known to people in this field and is not within the scope of protection of this application. Its specific structure and working principle are no longer described in this application. A locking groove 4 is vertically opened on the meter body 1.

[0025] In addition, the positioning frame 8 slides along the locking groove 4 on the meter body 1, the fixed jaw 2 is installed with the positioning frame 8 through the mounting shaft 10 and the mounting shaft 2 11, and the movable jaw 3 is rotatably connected with the positioning frame 8 through the mounting shaft 10. By controlling the swing of the movable jaw 3, the movable jaw 3 is controlled to engage with the fixed jaw 2 to realize the detection of the circuit to be tested, and by controlling the positioning frame 8 to move vertically along the locking groove 4, as shown in FIG. Figure 4 As shown, the positioning frame 8 is controlled to move, and the fixed jaw 2 and the movable jaw 3 that are engaged are driven to move, so that they move toward the main body of the meter body 1. During the movement of the fixed jaw 2 and the movable jaw 3, the circuit will be clamped and pushed to the center line of the fixed jaw 2 and the movable jaw 3, reducing the offset state of the circuit and improving the detection accuracy of the circuit. The positioning frame 8 is laterally slidingly connected with a support rod 13 whose end abuts against the inner side of the movable jaw 3. A support spring 14 is installed at the end of the support rod 13 away from the movable jaw 3. The support spring 14 pushes the support rod 13 to abut against the movable jaw 3, thereby supporting the movable jaw 3, so that the movable jaw 3 is docked with the end of the fixed jaw 2, and the fixed jaw 2 and the movable jaw 3 are tightly closed.

[0026] It is worth mentioning that see Figure 3-Figure 9 The control mechanism includes a telescopic member 9 mounted on the meter body 1 and a locking cylinder 12 mounted on the positioning frame 8. The output end of the telescopic member 9 passes through the positioning frame 8 and is connected to the top of the inner cavity of the telescopic member 9. A surrounding elastic band 15 is embedded in the outer ring of the locking cylinder 12, and the elastic band 15 corresponds to the support rod 13. The locking cylinder 12 is moved downward by the contraction of the telescopic member 9. Figure 4 As shown, the positioning frame 8 is synchronously driven to move, thereby controlling the fixed jaw 2 and the movable jaw 3 to move downward. When the fixed jaw 2 and the movable jaw 3 are close to the line, they will be subject to resistance from the line, such as Figure 8 and Figure 9As shown, at this time, the continuous contraction of the telescopic member 9 will drive the top of the locking cylinder 12 to compress the elastic band 15, and the compressed elastic band 15 will protrude outward and deform.

[0027] Through the above structural design, the elastic band 15 is provided to play a buffering role, thereby preventing the fixed jaw 2 and the movable jaw 3 from continuously moving downward and squeezing and damaging the line. At the same time, the outer wall of the deformed elastic band 15 contacts the side support rod 13, thereby limiting the movement of the support rod 13, and then locking the position of the movable jaw 3, so that when the movable jaw 3 continues to press down on the line, the reaction force of the line is not easy to push the movable jaw 3 to move and disconnect from the fixed jaw 2, so that the movable jaw 3 and the fixed jaw 2 can always be tightly fastened.

[0028] In this embodiment, the elastic band 15 is made of elastic material. When under pressure, the elastic band 15 is deformed into an outward convex shape and the outer wall abuts against the support rod 13. The elastic band 15 has a certain toughness. After being subjected to force, the top of the locking cylinder 12 presses down to compress and deform the elastic band 15. The inner sides of the docking ends of the fixed jaw 2 and the movable jaw 3 are both provided with blocking pads 7. By providing the blocking pads 7, when the fixed jaw 2 and the movable jaw 3 move downward to lock the line, the blocking pads 7 contact and lock the line, avoiding the line from being close to the fixed jaw 2 and the movable jaw 3, which causes the line to be deviated, and avoiding the line from being close to the joint between the fixed jaw 2 and the movable jaw 3, which affects the accuracy of line detection.

[0029] It is worth mentioning that see Figure 7-10The inner cavity of the locking cylinder 12 is respectively equipped with an air pressure sensor 20 and a proximity switch 19 corresponding to the top of the locking cylinder 12. The side wall of the locking cylinder 12 is installed with a solenoid valve 25. The air pressure sensor 20 detects the air pressure state in the locking cylinder 12 and determines the compression state of the fixed jaw 2 and the movable jaw 3 on the circuit. The proximity switch 19 is used to detect the position of the top of the locking cylinder 12. When the top of the locking cylinder 12 contacts the proximity switch 19, the elastic band 15 is deformed and contacts the support rod 13. A positioning controller, a positioning button 5 and a release button 6 are provided on the meter body 1. The positioning controller is provided with a positioning module And analysis module, the positioning module is respectively connected with the analysis module, the positioning button 5, the release button 6 and the telescopic member 9 signal, the analysis module is respectively connected with the proximity switch 19, the air pressure sensor 20 and the solenoid valve 25 signal. After the line is clamped by the fixed jaw 2 and the movable jaw 3, the positioning signal is sent to the positioning module by pressing the positioning button 5. The positioning module controls the telescopic member 9 to work, and the telescopic member 9 contracts to drive the positioning frame 8 and the fixed jaw 2 and the movable jaw 3 to move downward. When the fixed jaw 2 and the movable jaw 3 contact the line and push it to contact the meter body 1, the top of the locking cylinder 12 moves downward to compress the inner cavity of the locking cylinder 12 , the air pressure sensor 20 detects the increase in air pressure inside the locking cylinder 12 and sends the air pressure data to the analysis module. The analysis module compares the received air pressure data with the preset air pressure threshold (the analysis module is preset with the maximum air pressure value when the movable jaw 3 and the fixed jaw 2 press down the line). When the air pressure data reaches the preset air pressure threshold, it is judged that the movable jaw 3 and the fixed jaw 2 have completely locked the line. At this time, the analysis module judges whether the proximity switch 19 receives the position signal from the top of the locking cylinder 12. If the result is no, it is judged that the deformation degree of the elastic band 15 is not enough to lock the support rod 13. At this time, the analysis module controls When the solenoid valve 125 is opened, the air pressure inside the locking cylinder 12 decreases, and the telescopic member 9 continues to contract, driving the top of the locking cylinder 12 to move downward and contact the proximity switch 19. At this time, the proximity switch 19 sends the detected position signal to the analysis module. The analysis module determines that the position of the support rod 13 is locked, and controls the telescopic member 9 to stop working, thereby automatically controlling the positioning frame 8 to move downward, and determining the locking state of the circuit. The elastic band 15 is synchronously controlled to deform to lock the position of the support rod 13, so that when the movable jaw 3 and the fixed jaw 2 are positioned on the circuit, the movable jaw 3 is not easily opened by the reaction force of the circuit, thereby improving the detection accuracy of the circuit; In addition, after the line detection is completed, the release button 6 is pressed to send a release signal to the positioning module, and the positioning module controls the telescopic part 9 to extend and reset, and when the telescopic part 9 is reset, the analysis module controls the solenoid valve 25 to close, thereby facilitating the next electrical line fault detection.

[0030] Preferably, Figure 9 and Figure 12As shown, two support rods 13 are provided, and the support rods 13 are respectively located on both sides of the elastic belt 15 of the annular structure, so that when the elastic belt 15 is deformed and convex, the outer wall of the elastic belt 15 protruding toward the periphery locks the support rods 13 on both sides, thereby improving the support and locking effect of the movable jaw 3. The outer ring of the elastic belt 15 is coated with an anti-slip coating, and the outer rings of the support rods 13 and the elastic belt 15 corresponding to each other are coated with an anti-slip coating, which can improve the locking effect of the support rods 13 and increase the friction between the two. Example 2

[0031] The portable detection device for electrical signal fault diagnosis provided in Example 1 is further optimized. Unlike Example 1, when the device is used for a long time, the support spring 14 will gradually fatigue and the elastic force will weaken, thereby reducing the support effect on the movable jaw 3, so that the movable jaw 3 cannot be tightly fastened with the fixed jaw 2. In order to solve the above problem, Figure 6-Figure 7 As shown, the portable detection equipment also includes an adjustment mechanism, which includes a push plate 24 slidingly connected to the positioning frame 8 along the axial direction of the movable jaw 3, and a regulating cylinder 17 installed with the positioning frame 8. The support rod 13 is plugged into the push plate 24, and the support spring 14 is installed between the front end of the support rod 13 and the push plate 24. The regulating cylinder 17 is plugged with a regulating piston 18 whose front end is connected to the push plate 24. When the elastic force of the support spring 14 weakens, the pressure in the inner cavity of the regulating cylinder 17 is increased to push the regulating piston 18 forward, and simultaneously push the push plate 24 to move to compress the support spring 14, thereby increasing the force of the support spring 14 on the support rod 13 and improving the service life of the support spring 14.

[0032] In this embodiment, if Figure 6 and Figure 10As shown, a pressure sensor 23 is installed at the connection between the regulating piston 18 and the push plate 24, and an air pressure regulating assembly is connected to the regulating cylinder 17. The air pressure regulating assembly is used to control the air pressure in the regulating cylinder 17, thereby controlling the extension length of the regulating piston 18. A regulating module is also provided on the positioning controller, and the regulating module is respectively connected to the analysis module, the air pressure regulating assembly and the pressure sensor 23. When the support spring 14 pushes the support rod 13 to abut against the movable jaw 3, the push plate 24 will receive the reaction force of the support spring 14 and be detected by the pressure sensor 23. The pressure sensor 23 sends the detected pressure data to the regulating module, and the regulating module compares the received pressure data with a preset pressure threshold (the regulating module is preset with the support spring 14 elastic force weakened to affect the movable jaw 3 and the fixed jaw 2 When the pressure data is compared with the minimum pressure value when fastened, when the judgment result is that the pressure data is less than the preset pressure threshold, it is judged that the elastic force of the support spring 14 is weakened and the supporting force on the support rod 13 needs to be increased, and the regulating module controls the air pressure regulating component to work, and the air pressure regulating component controls the increase in the air pressure in the regulating cylinder 17, and the regulating piston 18 extends forward to push the push plate 24 to compress the support spring 14. When the regulating module judges that the pressure data fed back by the pressure sensor 23 is greater than the preset pressure threshold, the regulating module controls the air pressure regulating component to stop working, thereby detecting the elastic force state of the support spring 14 in real time, and automatically adjusting the supporting force of the support spring 14 on the support rod 13 when the elastic force of the support spring 14 weakens, thereby controlling the movable jaw 3 to continuously close to the fixed jaw 2, thereby improving the accuracy of electrical circuit fault detection. Example 3

[0033] The portable detection device for electrical signal fault diagnosis provided in the second embodiment is further optimized. The difference from the second embodiment is that, Figures 9-11As shown, the air pressure regulating component includes an air tank 16 connected to the locking cylinder 12 through a pipeline, an air pressure sensor 22 installed in the inner cavity of the air tank 16, and an electromagnetic valve 21 is installed on the pipeline between the locking cylinder 12 and the air tank 16. The air tank 16 is connected to the inner cavity of the regulating cylinder 17 through a pipeline. The regulating module is respectively connected to the electromagnetic valve 21 and the air pressure sensor 22 signals. The locking cylinder 12 is pressed down by shortening the telescopic member 9, and the cavity of the locking cylinder 12 is compressed to increase the internal air pressure. The regulating module compares the pressure data received from the pressure sensor 23 with the preset pressure threshold. When the judgment result is that the pressure data is less than the preset pressure threshold, the regulating module starts the boosting program. The regulating module controls the electromagnetic valve 1 25 to close through the analysis module, and controls the electromagnetic valve 2 21 to open. The gas in the locking cylinder 12 enters the air tank 16 through the pipeline and increases The pressure in the gas tank 16 increases synchronously with the pressure in the gas tank 16 and the regulating cylinder 17, and pushes the regulating piston 18 forward. The air pressure sensor 22 will detect the air pressure data in the gas tank 16 and feed it back to the regulating module. The regulating module judges the air pressure state in the gas tank 16 through the air pressure data detected by the gas tank 16. When the regulating piston 18 extends forward, the pressure sensor 23 detects that the pressure value continues to increase. When the regulating module judges that the pressure data fed back by the pressure sensor 23 is greater than the preset pressure threshold, the regulating module controls the solenoid valve 2 21 to close and controls the solenoid valve 1 25 to open through the analysis module. At this time, the analysis module judges the position signal of the top of the locking cylinder 12 through the proximity switch 19, so that the elastic band 15 deforms to lock the position of the support rod 13, thereby realizing the automatic adjustment of the supporting force of the support spring 14 on the support rod 13, thereby improving the accuracy of electrical circuit fault detection.

Claims

1. A portable detection device for electrical signal fault diagnosis, characterized in that: include: A meter body (1), wherein the meter body (1) is provided with a fixed jaw (2) and a movable jaw (3) that are interlocked with each other, the fixed jaw (2) and the movable jaw (3) that are interlocked with each other form a closed annular body, and a locking groove (4) is vertically opened on the meter body (1); A positioning frame (8), wherein the positioning frame (8) slides along the locking groove (4) on the watch body (1), the fixed jaw (2) is mounted on the positioning frame (8) via a mounting shaft 1 (10) and a mounting shaft 2 (11), the movable jaw (3) is rotatably connected to the positioning frame (8) via a mounting shaft 1 (10), a support rod (13) whose end abuts against the inner side of the movable jaw (3) is laterally slidably connected to the positioning frame (8), and a support spring (14) is mounted on one end of the support rod (13) away from the movable jaw (3); A control mechanism, the control mechanism comprising a telescopic member (9) mounted on a meter body (1) and a locking cylinder (12) mounted on a positioning frame (8), the output end of the telescopic member (9) passing through the positioning frame (8) and connected to the top of the inner cavity of the telescopic member (9), an outer ring of the locking cylinder (12) is embedded with a surrounding elastic band (15), and the elastic band (15) corresponds to the support rod (13).

2. A portable detection device for electrical signal fault diagnosis according to claim 1, characterized in that: The elastic band (15) is made of elastic material. When under pressure, the elastic band (15) is deformed into an outward convex shape and the outer wall abuts against the support rod (13). The inner sides of the butt ends of the fixed jaw (2) and the movable jaw (3) are both provided with a blocking pad (7).

3. The portable detection device for electrical signal fault diagnosis according to claim 1, characterized in that: An air pressure sensor (20) and a proximity switch (19) corresponding to the top of the locking cylinder (12) are respectively installed in the inner cavity of the locking cylinder (12), and an electromagnetic valve (25) is installed on the side wall of the locking cylinder (12).

4. A portable detection device for electrical signal fault diagnosis according to claim 3, characterized in that: The meter body (1) is provided with a positioning controller, a positioning button (5) and a release button (6); the positioning controller is provided with a positioning module and an analysis module; the positioning module is respectively connected to the analysis module, the positioning button (5), the release button (6) and the telescopic member (9) for signals; the analysis module is respectively connected to the proximity switch (19), the air pressure sensor (20) and the solenoid valve (25) for signals.

5. The portable detection device for electrical signal fault diagnosis according to claim 4, characterized in that: The invention also includes an adjusting mechanism, which includes a push plate (24) slidably connected to the positioning frame (8) along the axial direction of the movable jaw (3), and a regulating cylinder (17) installed with the positioning frame (8). The support rod (13) is plugged into the push plate (24), and the support spring (14) is installed between the front end of the support rod (13) and the push plate (24). The regulating cylinder (17) is plugged with a regulating piston (18) whose front end is connected to the push plate (24).

6. The portable detection device for electrical signal fault diagnosis according to claim 5, characterized in that: A pressure sensor (23) is installed at the connection between the regulating piston (18) and the push plate (24), an air pressure regulating assembly is connected to the regulating cylinder (17), and a regulating module is also provided on the positioning controller. The regulating module is respectively connected to the analysis module, the air pressure regulating assembly and the pressure sensor (23) for signal transmission.

7. The portable detection device for electrical signal fault diagnosis according to claim 6, characterized in that: The air pressure regulating assembly comprises an air storage tank (16) connected to the locking cylinder (12) through a pipeline, and a second air pressure sensor (22) installed in the inner cavity of the air storage tank (16). A second solenoid valve (21) is installed on the pipeline between the locking cylinder (12) and the air storage tank (16). The air storage tank (16) is connected to the inner cavity of the regulating cylinder (17) through a pipeline.

8. The portable detection device for electrical signal fault diagnosis according to claim 7, characterized in that: The regulating module is respectively connected to the second solenoid valve (21) and the second air pressure sensor (22) for signals.

9. The portable detection device for electrical signal fault diagnosis according to claim 1, characterized in that: Two support rods (13) are provided, and the support rods (13) are respectively located on both sides of the elastic band (15) of the annular structure.

10. The portable detection device for electrical signal fault diagnosis according to claim 1, characterized in that: The outer ring of the elastic band (15) is coated with an anti-slip coating, and the outer rings of the support rod (13) corresponding to the elastic band (15) are also coated with an anti-slip coating.

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