Clamping piece type current electrifying test connecting device

Abstract

The invention discloses a clamping piece type current power-on test connecting device, and belongs to the technical field of power-on connection, the clamping piece type current power-on test connecting device comprises a bottom plate and a connection mechanism used for being connected with an external wire, and the bottom plate is provided with a selection mechanism used for selecting different measuring ranges according to different currents and a test mechanism used for being connected with a tested external device; according to the selection mechanism, electromagnetic coils with different starting currents are used for sensing the magnitude of the current of a main loop, it is ensured that only one loop with the corresponding measuring range is physically connected each time through a unique hydraulic interlocking mechanism, and the loop is automatically switched to a matched measuring branch circuit and an ammeter in a non-inductive mode according to the measured current; compared with the prior art, tediousness and risks of manual range switching are avoided, intelligent testing is achieved, meanwhile, the circuit breaker of the non-activated loop can protect the sensitive coil during overcurrent, misoperation or damage is prevented, and safe use of the device and the instrument in a wide current range is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of electrical connection technology, and in particular to a clip-on current-conducting test connection device. Background Technology

[0002] In electrical equipment testing, power system maintenance, and laboratory research, conducting circuit energization tests and measuring current and voltage parameters is a fundamental and crucial operation. Traditional current energization test connection methods typically employ mechanical connection methods such as bolt fixing, clamping, or manual plugging and unplugging. These methods have the following shortcomings.

[0003] Traditional bolted connections or simple clamping methods rely on the operator's strength and skill, which can easily lead to increased contact resistance due to insufficient pressure or oxidation of the contact surface, causing localized heating, measurement errors, and even the risk of burning under high current conditions. During testing, especially when connecting or disconnecting with power, electric arcs can easily be generated, posing a safety hazard to operators and equipment. When performing multi-range current measurements, it is usually necessary to manually switch instrument ranges or replace accessories such as shunts and transformers. This process is not only cumbersome and time-consuming, but may also cause danger due to operational errors. Existing technologies lack intelligent selection mechanisms that can automatically and reliably select and switch to the appropriate measurement range based on the magnitude of the measured current, resulting in test process interruptions and low integration of automated test systems. To achieve functions such as power-on, measurement, and protection, existing test devices are often pieced together from multiple independent components, resulting in a loose structure, large space occupation, and complex wiring, which is not conducive to portable applications or deployment in high-density test environments.

[0004] Therefore, there is an urgent need for a new type of current-current testing connection device to solve the above problems. An ideal device should have reliable connection, safe operation, the ability to automatically select the appropriate measurement range according to the current magnitude, compact structure and high integration, and the ability to perform voltage and current measurements simultaneously, thereby improving testing efficiency, ensuring operational safety and improving the accuracy of test results. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention adopts the following technical solution: a clip-on current conduction test connection device, comprising a base plate and a connection mechanism for connecting to an external wire, wherein the base plate is provided with a selection mechanism for selecting different measurement ranges according to different current magnitudes and a test mechanism for connecting to an external device for testing.

[0006] The connection mechanism includes a conductive frame fixedly installed on the base plate, a docking frame fixedly installed on the base plate, an insertion module and a snap-fit ​​module provided on the docking frame, and a top horizontal plate fixedly installed on the docking frame.

[0007] The testing mechanism includes an output conductive plate fixedly installed on the base plate and three independent rear conductive frames. Three measuring frames are fixedly installed on the base plate, and each measuring frame is equipped with an insertion module and a snap-fit ​​module.

[0008] Furthermore, the communication mechanism includes an input terminal fixedly installed on the base plate, one end of the incoming wire fixedly installed on the input terminal, one end of the outgoing wire fixedly installed on the conductive frame, and a voltmeter fixedly installed on the top horizontal plate, with the voltmeter connected to the input terminal and the outgoing conductive plate.

[0009] Furthermore, the insertion module includes an insulating slide, a vertical plate, a motor slide, and a lower slide. An insertion motor is fixedly mounted on the motor slide, an upper lead screw is fixedly mounted on the motor shaft of the insertion motor, an intermediate column is fixedly mounted below the upper lead screw, and a lower lead screw is fixedly mounted below the intermediate column. The thread direction of the lower lead screw is opposite to that of the upper lead screw, and the lower lead screw is rotatably mounted to the lower slide.

[0010] Furthermore, the motor slide of the insertion module on the docking frame is slidably installed on the top of the docking frame, the lower slide is slidably installed inside the docking frame, and the insulating slide and the upright plate are fixedly installed inside the docking frame. Similarly, the motor slide of the insertion module on the measuring frame is slidably installed on the top of the measuring frame, the lower slide is slidably installed inside the measuring frame, and the insulating slide and the upright plate are fixedly installed inside the measuring frame.

[0011] Furthermore, the insertion module also includes a passive rotating rod rotatably mounted on the upright plate. A lifting frame is rotatably mounted on the passive rotating rod. The lifting frame has an internal thread. The upper lifting frame forms a threaded drive with the upper lead screw, and the lower lifting frame forms a threaded drive with the lower lead screw. An insertion connecting rod is rotatably mounted on the lifting frame. A connecting piece is rotatably mounted on the insertion connecting rod. The connecting piece slides on an insulating slide block. One end of the connecting piece is provided with an entry wire. The other end of the entry wire of the insertion module located on the docking frame is connected to the entry wire, and the other end of the entry wire of the insertion module located on the measuring frame is connected to the rear conductive frame.

[0012] Furthermore, the snap-fit ​​module includes a connection box, with clamping columns slidably installed above and below the connection box, a clamping plate fixedly installed on the clamping columns, a clamping spring provided between the clamping plate and the connection box, upper and lower spring pieces and side spring pieces provided inside the connection box, the upper and lower spring pieces and the side spring pieces fixedly installed, the clamping plate contacting the side spring pieces, the upper and lower spring pieces and the side spring pieces can be bent, a connection head fixedly installed on the upper and lower spring pieces, and an arc extinguishing grid plate fixedly installed on the connection box.

[0013] Furthermore, the connection box of the snap-fit ​​module on the docking frame is fixedly installed with the docking frame, and the connection head is connected to the other end of the outgoing line. The connection box of the snap-fit ​​module on the measuring frame is fixedly installed with the measuring frame, and the connection head is fixedly installed with the outgoing conductive sheet.

[0014] In use, the device is connected to the equipment to be tested through the input and output terminals. At this time, the current passes through the input terminal and the input wire to the input terminal of the insertion module on the docking frame. Then the current flows to the contact plate. At this time, the insertion motor rotates, which drives the upper lead screw, the middle column and the lower lead screw to rotate. The upper lead screw drives the lifting frame located above the middle column to descend, and the lifting frame located below the middle column to rise, which drives the contact plate to move along the insulating slide towards the connection box, so that the contact plate is inserted into the connection box.

[0015] When the connecting piece just enters the connecting piece and contacts the upper and lower springs and the springs on both sides, the arc is extinguished by the arc-extinguishing grid. The compression spring and the elastic force of the springs on both sides and the upper and lower springs themselves clamp the connecting piece, making the upper and lower springs and the springs on both sides in close contact with the connecting piece. The current flows into the connecting head through the connecting piece, the upper and lower springs and the springs on both sides. Then the connecting head transmits the current to the outgoing line, and then the current is transmitted to the conductive frame.

[0016] Measure the voltage when the circuit is closed using a voltmeter.

[0017] Furthermore, the testing mechanism also includes an output terminal fixedly installed on the base plate, the output terminal fixedly installed with the output conductive plate, and three ammeters fixedly installed on the top horizontal plate, the three ammeters being respectively connected to the connecting plate and the output conductive plate located inside the measuring frame.

[0018] The current passes through the conductive frame and the selection mechanism into the corresponding rear conductive frame. Then, the current passes through the rear conductive frame into the insertion module inside the measuring frame. Subsequently, the insertion module inside the measuring frame connects with the snap-fit ​​module, and the current flows out from the connection head of the snap-fit ​​module inside the measuring frame. Then, the current flows out through the output conductive plate and the output terminal, forming a circuit.

[0019] The selection mechanism selects one of the three measuring frames to connect. The three ammeters have different ranges. The selection mechanism selects the appropriate measuring frame and ammeter to connect according to the magnitude of the input current, and the ammeter measures the current when the connection is made.

[0020] Furthermore, the selection mechanism includes a front conductive frame fixedly mounted on a conductive frame, three coil boxes fixedly mounted on the base plate, and a large coil, a medium coil, and a small coil respectively disposed in the three coil boxes. An insulating post is slidably mounted in each of the large, medium, and small coils. A connecting guide post and an iron core are fixedly mounted on the insulating post. A rear plate is fixedly mounted on the iron core. A resistance spring is disposed between the rear plate and the coil box. The conductive frame is electrically connected to the large, medium, and small coils. A circuit breaker is disposed between the conductive frame and the medium coil, and a circuit breaker is disposed between the conductive frame and the small coil.

[0021] Furthermore, the selection mechanism also includes a hydraulic tank fixedly installed on the coil box, the hydraulic tank having an oil passage filled with hydraulic oil, and an insertion plug fixedly installed on the rear plate, the insertion plug being slidably installed with the hydraulic tank.

[0022] As current enters the conductor frame, the current within the conductor frame flows into the large coil, medium coil, and small coil respectively. The starting current of the large coil is greater than that of the medium coil, which in turn is greater than that of the small coil. When the current is smaller, the small coil is switched on, attracting the iron core. The iron core moves towards the front conductor frame, causing the insertion plug on the iron core within the small coil to be inserted into the oil passage. The hydraulic oil in the oil passage can only accommodate one insertion plug inserted into the oil passage. Subsequently, the connecting guide post passes through the front conductor frame and is inserted into the rear conductor frame in front of it. The current passes through the conductor frame and the connecting guide post into the rear conductor frame, energizing the rear conductor frame.

[0023] When the current is at its maximum, the large coil is activated, which drives the iron core, insulating post, connecting post and insert plug inside to move, so that its corresponding rear conductive frame is connected. At the same time, the magnetic force generated by the large coil is at its maximum, and the insert plug enters the oil passage. The other two insert plugs cannot enter. Only one rear conductive frame is connected at a time. The circuit breaker is used to protect the intermediate coil and small coil when the current is high.

[0024] The beneficial effects of this invention compared with the prior art are: (1) When the insertion motor of the insertion module of this invention drives the connecting piece to enter the connecting box of the snap-fit ​​module, the connecting piece is simultaneously and flexibly pressed by the elastic upper and lower springs and the springs on both sides from multiple directions, and is supplemented by the continuous pressure of the compression spring, which ensures a tight and firm connection between the electrical contact surfaces. Compared with traditional bolt fixing or simple clamping, it can effectively overcome the problem of uneven contact surfaces or slight oxidation, significantly reduce contact resistance, avoid local overheating and electric sparks caused by poor contact, and improve the stability and safety of power-on testing; (2) The snap-fit ​​module of this invention is specially equipped with an arc-extinguishing grid plate, which can effectively divide and cool the electric arc at the moment when the connecting piece is inserted and contacts the spring, preventing the electric arc from burning. Damage to contacts or threats to operators are prevented, thus improving the safety of live operation. At the same time, the switching process is precisely controlled by the insertion motor through the screw mechanism, realizing the automation and remote control of the connection. (3) The selection mechanism set in this invention uses electromagnetic coils with different starting currents to sense the magnitude of the main circuit current, and ensures that only one circuit with the corresponding range is physically connected each time through a unique hydraulic interlock mechanism. It automatically and seamlessly switches to the matching measurement branch and ammeter according to the measured current, avoiding the tediousness and risks of manually switching the range, realizing the intelligent testing. At the same time, the circuit breaker of the non-activated circuit can protect the sensitive coil during overcurrent, preventing malfunction or damage, and ensuring the safe use of the device and instrument in a wide current range. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the connection mechanism of the present invention. Figure 1 .

[0027] Figure 3 This is a schematic diagram of the connection mechanism of the present invention. Figure 2 .

[0028] Figure 4 This is a schematic diagram of the insertion module structure of the present invention.

[0029] Figure 5 This is a schematic diagram of the snap-fit ​​module structure of the present invention.

[0030] Figure 6 This is a schematic diagram of the testing mechanism structure of the present invention. Figure 1 .

[0031] Figure 7 This is a schematic diagram of the testing mechanism structure of the present invention. Figure 2 .

[0032] Figure 8 This is a schematic diagram of the testing mechanism structure of the present invention. Figure 3 .

[0033] Figure 9 Schematic diagram of the selected mechanism structure for this invention Figure 1 .

[0034] Figure 10 Schematic diagram of the selected mechanism structure for this invention Figure 2 .

[0035] Figure 11 Schematic diagram of the selected mechanism structure for this invention Figure 3 .

[0036] Figure 12 Schematic diagram of the selected mechanism structure for this invention Figure 4 .

[0037] Figure 13 Schematic diagram of the selected mechanism structure for this invention Figure 5 .

[0038] Reference numerals: 101-Base plate; 102-Inlet terminal; 103-Conductive frame; 104-Connecting frame; 105-Top horizontal plate; 106-Voltmeter; 107-Inlet wire; 108-Motor slide; 109-Insert motor; 110-Upper lead screw; 111-Intermediate column; 112-Lower lead screw; 113-Lifting frame; 114-Insert connecting rod; 115-Connecting plate; 116-Insulating slide; 117-Outlet wire; 118-Connecting box; 119-Pressure plate; 120-Pressure column; 121-Pressure spring; 122-Arc extinguishing grid; 123-Upper and lower springs; 124- Two side springs; 125-Connector; 126-Slide seat; 127-Passive rotating rod; 128-Upright plate; 129-Inlet wiring; 201-Outlet terminal; 202-Outlet conductive plate; 203-Ammeter; 204-Measuring frame; 205-Rear conductive frame; 301-Front conductive frame; 302-Hydraulic tank; 303-Coil box; 304-Large coil; 305-Medium coil; 306-Small coil; 307-Insulating post; 308-Connecting guide post; 309-Iron core; 310-Rear plate; 311-Resistance spring; 312-Insert plug; 313-Circuit breaker; 314-Oil passage. Detailed Implementation

[0039] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0040] Example: Reference Figures 1-13 A clip-on current conduction test connection device includes a base plate 101 and a connection mechanism for connecting to an external wire. The base plate 101 is provided with a selection mechanism for selecting different measurement ranges according to different current magnitudes and a test mechanism for connecting to an external device for testing.

[0041] The connection mechanism includes a conductive frame 103 fixedly installed on the base plate 101, a docking frame 104 fixedly installed on the base plate 101, an insertion module and a snap-fit ​​module provided on the docking frame 104, and a top horizontal plate 105 fixedly installed on the docking frame 104.

[0042] The testing mechanism includes a conductive sheet 202 fixedly mounted on a base plate 101 and three independent rear conductive frames 205. Three measuring frames 204 are fixedly mounted on the base plate 101, and each measuring frame 204 is provided with an insertion module and a snap-fit ​​module.

[0043] like Figures 2-5 As shown, the connecting mechanism includes an input terminal 102 fixedly installed on the base plate 101, one end of an incoming wire 107 fixedly installed on the input terminal 102, one end of an outgoing wire 117 fixedly installed on the conductive frame 103, and a voltmeter 106 fixedly installed on the top horizontal plate 105. The voltmeter 106 is connected to the input terminal 102 and the outgoing conductive plate 202.

[0044] like Figures 2-5 As shown, the insertion module includes an insulating slide 116, a vertical plate 128, a motor slide 108, and a lower slide 126. An insertion motor 109 is fixedly mounted on the motor slide 108. An upper lead screw 110 is fixedly mounted on the motor shaft of the insertion motor 109. An intermediate column 111 is fixedly mounted below the upper lead screw 110. A lower lead screw 112 is fixedly mounted below the intermediate column 111. The thread direction of the lower lead screw 112 is opposite to that of the upper lead screw 110. The lower lead screw 112 is rotatably mounted to the lower slide 126.

[0045] like Figures 2-5 As shown, the motor slide 108 of the insertion module on the docking frame 104 is slidably mounted on the top of the docking frame 104, the lower slide 126 is slidably mounted inside the docking frame 104, and the insulating slide 116 and the upright plate 128 are fixedly mounted inside the docking frame 104. Similarly, the motor slide 108 of the insertion module on the measuring frame 204 is slidably mounted on the top of the measuring frame 204, the lower slide 126 is slidably mounted inside the measuring frame 204, and the insulating slide 116 and the upright plate 128 are fixedly mounted inside the measuring frame 204.

[0046] like Figures 2-5 As shown, the insertion module also includes a passive rotating rod 127 rotatably mounted on the upright plate 128. A lifting frame 113 is rotatably mounted on the passive rotating rod 127. The lifting frame 113 has an internal thread. The upper lifting frame 113 forms a threaded drive with the upper lead screw 110, and the lower lifting frame 113 forms a threaded drive with the lower lead screw 112. An insertion connecting rod 114 is rotatably mounted on the lifting frame 113. A connecting piece 115 is rotatably mounted on the insertion connecting rod 114. The connecting piece 115 slides on the insulating slide block 116. One end of the connecting piece 115 is provided with an entry wire 129. The other end of the entry wire 129 of the insertion module located on the docking frame 104 is connected to the entry wire 107. The other end of the entry wire 129 of the insertion module located on the measuring frame 204 is connected to the rear conductive frame 205.

[0047] like Figures 2-5 As shown, the snap-fit ​​module includes a connection box 118. A clamping column 120 is slidably installed above and below the connection box 118. A clamping plate 119 is fixedly installed on the clamping column 120. A clamping spring 121 is provided between the clamping plate 119 and the connection box 118. The connection box 118 is provided with upper and lower spring pieces 123 and side spring pieces 124. The upper and lower spring pieces 123 and the side spring pieces 124 are fixedly installed. The clamping plate 119 contacts the side spring pieces 124. The upper and lower spring pieces 123 and the side spring pieces 124 can be bent. A connection head 125 is fixedly installed on the upper and lower spring pieces 123. An arc extinguishing grid plate 122 is fixedly installed on the connection box 118.

[0048] like Figures 2-5As shown, the connection box 118 of the snap-fit ​​module on the docking frame 104 is fixedly installed with the docking frame 104, and the connection head 125 is connected to the other end of the outgoing line 117. The connection box 118 of the snap-fit ​​module on the measuring frame 204 is fixedly installed with the measuring frame 204, and the connection head 125 is fixedly installed with the outgoing conductive sheet 202.

[0049] In use, the device is connected to the device under test through the input terminal 102 and the output terminal 201. At this time, the current passes through the input terminal 102, enters the wire 107 and enters the input terminal 129 of the insertion module on the docking frame 104. Then the current flows to the connecting piece 115. At this time, the insertion motor 109 rotates, driving the upper lead screw 110, the intermediate column 111 and the lower lead screw 112 to rotate. The upper lead screw 110 drives the lifting frame 113 located above the intermediate column 111 to descend, and the lifting frame 113 located below the intermediate column 111 to rise, driving the connecting piece 115 to move along the insulating slide 116 towards the connecting box 118, so that the connecting piece 115 is inserted into the connecting box 118.

[0050] When the connecting piece 115 just enters the connecting piece 115 and contacts the upper and lower spring pieces 123 and the two side spring pieces 124, the arc is extinguished by the arc-extinguishing grid piece 122. The compression spring 121 and the elastic force of the two side spring pieces 124 and the upper and lower spring pieces 123 themselves cause the upper and lower spring pieces 123 and the two side spring pieces 124 to clamp the connecting piece 115, so that the upper and lower spring pieces 123, the two side spring pieces 124 and the connecting piece 115 are in close contact. The current flows through the connecting piece 115, the upper and lower spring pieces 123, the two side spring pieces 124 into the connecting head 125. Then the connecting head 125 transmits the current to the outgoing line 117, and then the current is transmitted to the conductive frame 103.

[0051] The voltage when the circuit is closed is measured using voltmeter 106.

[0052] like Figures 6-8 As shown, the testing mechanism also includes an output terminal 201 fixedly installed on the base plate 101. The output terminal 201 is fixedly installed with the output conductive plate 202. Three ammeters 203 are fixedly installed on the top horizontal plate 105. The three ammeters 203 are respectively connected to the connecting piece 115 and the output conductive plate 202 located in the measuring frame 204.

[0053] The current passes through the conductive frame 103 and the selection mechanism into the corresponding rear conductive frame 205. Then, the current passes through the rear conductive frame 205 into the insertion module in the measuring frame 204. Subsequently, the insertion module in the measuring frame 204 connects with the snap-fit ​​module, and the current flows out from the connection head 125 of the snap-fit ​​module in the measuring frame 204. Then, the current flows out through the output conductive plate 202 and the output terminal 201, forming a circuit.

[0054] The selection mechanism selects one of the three measuring frames 204 to be turned on. The three ammeters 203 have different ranges. The selection mechanism selects the corresponding measuring frame 204 and ammeter 203 to be turned on according to the magnitude of the input current. The current when the ammeter is turned on is measured by the ammeter 203.

[0055] like Figures 9-13 As shown, the selection mechanism includes a front conductive frame 301 fixedly mounted on a conductive frame 103. Three coil boxes 303 are fixedly mounted on the base plate 101. A large coil 304, a medium coil 305, and a small coil 306 are respectively arranged in the three coil boxes 303. An insulating post 307 is slidably installed in each of the large coil 304, medium coil 305, and small coil 306. A connecting guide post 308 and an iron core 309 are fixedly mounted on the insulating post 307. A rear plate 310 is fixedly mounted on the iron core 309. A resistance spring 311 is arranged between the rear plate 310 and the coil box 303. The conductive frame 103 is electrically connected to the large coil 304, medium coil 305, and small coil 306. A circuit breaker 313 is arranged between the conductive frame 103 and the medium coil 305, and a circuit breaker 313 is arranged between the conductive frame 103 and the small coil 306.

[0056] like Figures 9-13 As shown, the selection mechanism also includes a hydraulic tank 302 fixedly installed on the coil box 303. The hydraulic tank 302 is provided with an oil passage 314, which is filled with hydraulic oil. An insertion plug 312 is fixedly installed on the rear plate 310, and the insertion plug 312 is slidably installed with the hydraulic tank 302.

[0057] As current enters the conductive frame 103, the current within the conductive frame 103 flows into the large coil 304, the medium coil 305, and the small coil 306 respectively. The starting current of the large coil 304 is greater than that of the medium coil 305, which is greater than that of the small coil 306. When the current is smaller, the small coil 306 is turned on, attracting the iron core 309. The iron core 309 moves towards the front conductive frame 301, causing the insertion plug 312 on the iron core 309 in the small coil 306 to be inserted into the oil passage 314. The hydraulic oil in the oil passage 314 can only accommodate one insertion plug 312 inserted into the oil passage 314. Subsequently, the connecting guide post 308 passes through the front conductive frame 301 and is inserted into the rear conductive frame 205 in front of it. The current passes through the conductive frame 103 and the connecting guide post 308 into the rear conductive frame 205, energizing the rear conductive frame 205.

[0058] When the current is at its maximum, the large coil 304 is activated. The large coil 304 drives the iron core 309, insulating post 307, connecting post 308 and insertion plug 312 inside it to move, so that its corresponding rear conductive frame 205 is connected. At the same time, the magnetic force generated by the large coil 304 is at its maximum, and the insertion plug 312 enters the oil passage 314. The other two insertion plugs 312 cannot enter. Only one rear conductive frame 205 is connected at a time. The circuit breaker 313 is used to protect the intermediate coil 305 and the small coil 306 when the current is high.

[0059] The working principle of the clip-on current conduction test connection device disclosed in this invention is as follows: When in use, the device is connected to the device to be tested through the input terminal 102 and the output terminal 201. At this time, the current passes through the input terminal 102, enters the wire 107 and enters the input terminal 129 of the insertion module on the docking frame 104. Then the current flows to the connecting piece 115. At this time, the insertion motor 109 rotates, driving the upper lead screw 110, the intermediate column 111 and the lower lead screw 112 to rotate. The upper lead screw 110 drives the lifting frame 113 located above the intermediate column 111 to descend, and the lifting frame 113 located below the intermediate column 111 to rise, driving the connecting piece 115 to move along the insulating slide 116 towards the connecting box 118, so that the connecting piece 115 is inserted into the connecting box 118.

[0060] When the connecting piece 115 just enters the connecting piece 115 and contacts the upper and lower spring pieces 123 and the two side spring pieces 124, the arc is extinguished by the arc-extinguishing grid piece 122. The compression spring 121 and the elastic force of the two side spring pieces 124 and the upper and lower spring pieces 123 themselves cause the upper and lower spring pieces 123 and the two side spring pieces 124 to clamp the connecting piece 115, so that the upper and lower spring pieces 123, the two side spring pieces 124 and the connecting piece 115 are in close contact. The current flows through the connecting piece 115, the upper and lower spring pieces 123, the two side spring pieces 124 into the connecting head 125. Then the connecting head 125 transmits the current to the outgoing line 117, and then the current is transmitted to the conductive frame 103.

[0061] As current enters the conductive frame 103, the current within the conductive frame 103 flows into the large coil 304, the medium coil 305, and the small coil 306 respectively. The starting current of the large coil 304 is greater than that of the medium coil 305, which is greater than that of the small coil 306. When the current is smaller, the small coil 306 is turned on, attracting the iron core 309. The iron core 309 moves towards the front conductive frame 301, causing the insertion plug 312 on the iron core 309 in the small coil 306 to be inserted into the oil passage 314. The hydraulic oil in the oil passage 314 can only accommodate one insertion plug 312 inserted into the oil passage 314. Subsequently, the connecting guide post 308 passes through the front conductive frame 301 and is inserted into the rear conductive frame 205 in front of it. The current passes through the conductive frame 103 and the connecting guide post 308 into the rear conductive frame 205, energizing the rear conductive frame 205. When the current is at its maximum, the large coil 304 is activated. The large coil 304 drives the iron core 309, insulating post 307, connecting post 308 and insertion plug 312 inside it to move, so that its corresponding rear conductive frame 205 is connected. At the same time, the magnetic force generated by the large coil 304 is at its maximum, and the insertion plug 312 enters the oil passage 314. The other two insertion plugs 312 cannot enter. Only one rear conductive frame 205 is connected at a time. The circuit breaker 313 is used to protect the intermediate coil 305 and the small coil 306 when the current is high.

[0062] The current passes through the conductive frame 103 and the selection mechanism into the corresponding rear conductive frame 205. Then, the current flows through the rear conductive frame 205 into the insertion module within the measuring frame 204. The insertion module in the measuring frame 204 then connects with the snap-fit ​​module, and the current flows out from the connection head 125 of the snap-fit ​​module in the measuring frame 204. The current then flows out through the output conductive plate 202 and the output terminal 201, forming a circuit. The selection mechanism selects one of the three measuring frames 204 to connect. The three ammeters 203 have different ranges. The selection mechanism selects the appropriate measuring frame 204 and ammeter 203 to connect based on the magnitude of the input current. The ammeter 203 measures the current when connected, and the voltmeter 106 measures the voltage when connected.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A clip-on current-conducting test connection device, comprising a base plate (101) and a connection mechanism for connecting to an external power line, characterized in that: The base plate (101) is provided with a selection mechanism for selecting different measurement ranges according to different current magnitudes and a test mechanism for communicating with external testing devices. The connection mechanism includes a conductive frame (103) fixedly installed on the base plate (101), a docking frame (104) fixedly installed on the base plate (101), an insertion module and a snap-fit ​​module provided on the docking frame (104), and a top horizontal plate (105) fixedly installed on the docking frame (104). The testing mechanism includes an output conductive sheet (202) and three independent rear conductive frames (205) fixedly installed on the base plate (101). Three measuring frames (204) are fixedly installed on the base plate (101), and each measuring frame (204) is provided with an insertion module and a snap-fit ​​module.

2. The clip-on current conduction test connection device according to claim 1, characterized in that: The communication mechanism includes an input terminal (102) fixedly installed on the base plate (101), one end of an incoming wire (107) fixedly installed on the input terminal (102), one end of an outgoing wire (117) fixedly installed on the conductive frame (103), and a voltmeter (106) fixedly installed on the top horizontal plate (105). The voltmeter (106) is connected to the input terminal (102) and the outgoing conductive plate (202).

3. The clip-on current conduction test connection device according to claim 2, characterized in that: The insertion module includes an insulating slide (116), a vertical plate (128), a motor slide (108), and a lower slide (126). An insertion motor (109) is fixedly installed on the motor slide (108). An upper lead screw (110) is fixedly installed on the motor shaft of the insertion motor (109). An intermediate column (111) is fixedly installed below the upper lead screw (110). A lower lead screw (112) is fixedly installed below the intermediate column (111). The thread direction of the lower lead screw (112) is opposite to that of the upper lead screw (110). The lower lead screw (112) is rotatably installed with the lower slide (126).

4. The clip-on current conduction test connection device according to claim 3, characterized in that: The motor slide (108) of the insertion module on the docking frame (104) is slidably installed on the top of the docking frame (104), the lower slide (126) is slidably installed inside the docking frame (104), and the insulating slide (116) and the upright plate (128) are fixedly installed inside the docking frame (104). The motor slide (108) of the insertion module on the measuring frame (204) is slidably installed on the top of the measuring frame (204), the lower slide (126) is slidably installed inside the measuring frame (204), and the insulating slide (116) and the upright plate (128) are fixedly installed inside the measuring frame (204).

5. The clip-on current conduction test connection device according to claim 4, characterized in that: The insertion module also includes a passive rotating rod (127) rotatably mounted on the upright plate (128). A lifting frame (113) is rotatably mounted on the passive rotating rod (127). The lifting frame (113) is provided with an internal thread. The upper lifting frame (113) and the upper lead screw (110) form a threaded transmission, and the lower lifting frame (113) and the lower lead screw (112) form a threaded transmission. An insertion connecting rod (114) is rotatably mounted on the lifting frame (113). A connecting piece (115) is rotatably mounted on the insertion connecting rod (114). The connecting piece (115) slides on the insulating slide (116). One end of the connecting piece (115) is provided with an entry wire (129). The other end of the entry wire (129) of the insertion module located on the docking frame (104) is connected to the entry wire (107). The other end of the entry wire (129) of the insertion module located on the measuring frame (204) is connected to the rear conductive frame (205).

6. The clip-on current conduction test connection device according to claim 5, characterized in that: The snap-fit ​​module includes a connection box (118), with a clamping column (120) slidably installed above and below the connection box (118), a clamping plate (119) fixedly installed on the clamping column (120), a clamping spring (121) between the clamping plate (119) and the connection box (118), upper and lower spring pieces (123) and side spring pieces (124) are provided inside the connection box (118), the upper and lower spring pieces (123) and the side spring pieces (124) are fixedly installed, the clamping plate (119) contacts the side spring pieces (124), the upper and lower spring pieces (123) and the side spring pieces (124) can be bent, a connection head (125) is fixedly installed on the upper and lower spring pieces (123), and an arc extinguishing grid plate (122) is fixedly installed on the connection box (118).

7. The clip-on current conduction test connection device according to claim 6, characterized in that: The connection box (118) of the snap-fit ​​module on the docking frame (104) is fixedly installed on the docking frame (104), and the connection head (125) is connected to the other end of the outgoing line (117). The connection box (118) of the snap-fit ​​module on the measuring frame (204) is fixedly installed on the measuring frame (204), and the connection head (125) is fixedly installed on the outgoing conductive sheet (202).

8. The clip-on current conduction test connection device according to claim 5, characterized in that: The testing mechanism also includes an output terminal (201) fixedly installed on the base plate (101), the output terminal (201) and the output conductive plate (202) are fixedly installed, and three ammeters (203) are fixedly installed on the top horizontal plate (105). The three ammeters (203) are respectively connected to the connecting piece (115) and the output conductive plate (202) located in the measuring frame (204).

9. The clip-on current conduction test connection device according to claim 1, characterized in that: The selection mechanism includes a front conductive frame (301) fixedly mounted on a conductive frame (103). Three coil boxes (303) are fixedly mounted on the base plate (101). A large coil (304), a medium coil (305), and a small coil (306) are respectively arranged in the three coil boxes (303). An insulating post (307) is slidably installed in each of the large coil (304), medium coil (305), and small coil (306). A connecting guide post (308) is fixedly mounted on the insulating post (307). The coil box (303) is equipped with a core (309) and a rear plate (310). A resistance spring (311) is provided between the rear plate (310) and the coil box (303). The conductive frame (103) is electrically connected to the large coil (304), the middle coil (305) and the small coil (306). A circuit breaker (313) is provided between the conductive frame (103) and the middle coil (305). A circuit breaker (313) is provided between the conductive frame (103) and the small coil (306).

10. A clip-on current conduction test connection device according to claim 9, characterized in that: The selection mechanism also includes a hydraulic tank (302) fixedly installed on the coil box (303). The hydraulic tank (302) is provided with an oil passage (314) filled with hydraulic oil. An insertion plug (312) is fixedly installed on the rear plate (310). The insertion plug (312) is slidably installed with the hydraulic tank (302).

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