Mounting mechanism and circuit breaker coil current characteristic monitoring device

Abstract

The utility model discloses an installation mechanism and a breaker coil current characteristic monitoring device, and relates to the technical field of current characteristic monitoring, and the installation mechanism comprises an installation rack assembly which comprises a positioning pedestal and connecting lugs arranged on the side wall of the positioning pedestal; the locking unit comprises a limiting block, a rack arranged on the end face of the limiting block, a limiting piece arranged above the rack, a rotating shaft arranged on the inner side of the limiting piece and a pushing piece arranged at the end of the limiting piece. And a plug board. The beneficial effects of the utility model are that through the mutual cooperation between the locking unit and the plug board, the locking unit can be installed at the inner side of the installation rack assembly more quickly, thereby facilitating the operation of workers, reducing the labor burden of the workers to a certain extent, and improving the working efficiency of the workers.

Description

Technical Field

[0001] The utility model relates to the technical field of current characteristic monitoring, in particular to a mounting mechanism and a circuit breaker coil current characteristic monitoring device. Background Art

[0002] The function of the real-time monitoring device for the characteristics of the circuit breaker opening and closing coils is to monitor the coil status in real time after the opening and closing coils are completed, so as to help the operation and maintenance personnel to predict whether they are good; the specific implementation method is to add a monitoring and control element in the secondary circuit, under the control of the opening and closing signal instructions, to provide instantaneous power supply for the opening and closing coils, and measure the voltage, current and resistance of the coils in real time, and can also monitor the coil core action and circuit breaker action characteristics online in real time.

[0003] However, the existing real-time monitoring device for the characteristics of the opening and closing coils of the circuit breaker can only monitor whether the closing circuit is intact in the opening state, but cannot take into account whether the coil is in good condition when closing, and cannot judge whether the opening and closing coils are in good condition during the opening and closing actions; that is, there is a lack of simultaneous monitoring means for the opening and closing coils after the opening and closing actions of the circuit breaker are completed, and it is impossible to judge whether the coils are damaged, and the only way to judge the quality of the coils is to wait for a signal to be sent after the next action; if the coils are damaged, related defects such as "control circuit disconnection" will occur during the action. At this time, the replacement of the opening and closing coils requires the equipment to be transferred for maintenance, and sometimes it is necessary to wait for the arrival period of accessories, which is not conducive to the safe and stable operation of the equipment; at the same time, the existing monitoring device needs to be installed in a fixed position during use, and the existing installation mostly uses bolts for installation and fixing, requiring the staff to rotate multiple sets of bolts separately, which is cumbersome to operate and increases the work intensity of the staff to a certain extent. Utility Model Content

[0004] In view of the above-mentioned prior art problems, the present utility model is proposed.

[0005] The utility model aims to provide a mounting mechanism, which aims to solve the problem that the existing monitoring equipment is complicated to operate during the installation process and is inconvenient for workers to install and disassemble.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a mounting mechanism, which includes a mounting frame assembly, including a positioning base, and a connecting ear arranged on a side wall of the positioning base;

[0007] The locking unit comprises a limit block, a rack arranged on the end surface of the limit block, a limit member arranged above the rack, a rotating shaft arranged inside the limit member, and a pushing member arranged at the end of the limit member;

[0008] Plug-in board;

[0009] The positioning base is connected to the plug board through the locking unit.

[0010] As a preferred solution of the installation mechanism of the utility model, the positioning base includes a cavity arranged inside the positioning base, slide grooves arranged on both sides of the bottom of the cavity, a movable groove arranged above the cavity, a through groove arranged on the end surface of the positioning base, a guide groove arranged on one side of the through groove, and shaft holes arranged on both sides above the cavity;

[0011] The cavity is communicated with the moving groove.

[0012] As a preferred solution of the installation mechanism of the utility model, wherein: the limit block includes sliders arranged on both sides thereof, and a first spring arranged on the end surface of the limit block;

[0013] The limiting block is inside the cavity; the sliding block matches the sliding groove; and the sliding block is slidably connected to the sliding groove.

[0014] As a preferred solution of the installation mechanism of the utility model, wherein: the limiting member includes a gear, a limiting rod arranged on the outer wall of the gear, and a second spring arranged on the end surface of the gear;

[0015] The gear includes a slot disposed on an inner side thereof;

[0016] The gear is meshed with the rack; the rack passes through the through slot and extends to the outside thereof.

[0017] As a preferred solution of the installation mechanism of the utility model, wherein: the rotating shaft includes a positioning key arranged on its side wall;

[0018] The positioning key and the card slot are clearance-matched;

[0019] The rotating shaft rotates inside the shaft hole.

[0020] As a preferred solution of the installation mechanism of the utility model, wherein: the pushing member includes a hinge seat, a hinge rod arranged inside the hinge seat, and a button arranged at the end of the hinge rod;

[0021] The hinge rod passes through the through slot and extends outward; the hinge rod matches with the guide slot.

[0022] As a preferred solution of the installation mechanism of the utility model, wherein: the plug board includes a card block arranged on its side wall;

[0023] The plug board is an L-shaped structure; the limiting rod is adapted to the clamping block.

[0024] The beneficial effect of the installation mechanism of the utility model is that through the cooperation between the provided locking unit and the plug-in board, the locking unit can be installed on the inner side of the mounting frame assembly more quickly, which is convenient for the staff to operate, reduces the labor burden of the staff to a certain extent, and improves the work efficiency of the staff.

[0025] Another object of the utility model is to provide a circuit breaker coil current characteristic monitoring device, which aims to solve the problem that the circuit breaker opening and closing coil characteristic real-time monitoring device is not capable of simultaneously monitoring whether the coil is in a good state in both the opening and closing states, which is not conducive to the safe operation of the equipment.

[0026] In order to solve the above technical problems, the utility model also provides the following technical solutions: a circuit breaker coil current characteristic monitoring device, which includes a mounting mechanism; and a monitoring instrument body, including a host and accessories;

[0027] The host includes a measurement acquisition conversion module, an A / D conversion module, a high-precision power supply module, a DSP digital signal processor and a human-machine interface module;

[0028] Accessories include power adapter, Hall AC / DC voltage sensor and Hall AC / DC current sensor;

[0029] The plug board is fixedly connected to the monitoring instrument body.

[0030] As a preferred solution of the circuit breaker coil current characteristic monitoring device of the utility model, wherein: the measurement acquisition conversion module acquires and measures the circuit breaker opening and closing coil voltage and current, performs low-pass filtering and operational amplifier isolation on them, and then sends them to the A / D conversion module;

[0031] The A / D conversion module performs secondary on-chip integrated filtering on the analog quantity and converts it into a digital quantity;

[0032] The DSP digital signal processor completes all signal variable calculations, wave recording, historical data comparison, odd variable signal analysis and outputs a test equipment status report.

[0033] As a preferred solution of the circuit breaker coil current characteristic monitoring device of the utility model, wherein: the high-precision power module completes the charging and discharging of the portable device and the power statistics, temperature, and charging voltage detection through the lithium battery management chip;

[0034] The human-machine interface module includes a simulation interface, a USB interface and a debugging interface;

[0035] The simulation interface completes online function expansion debugging;

[0036] The USB interface completes offline analysis of test data;

[0037] The debugging interface performs online collaborative analysis and processing.

[0038] The beneficial effects of the circuit breaker coil current characteristic monitoring device of the utility model are as follows: the device monitors the operation status of the circuit breaker in real time online, compares it with the previous situation, automatically predicts the circuit breaker coil status, outputs it graphically to the operation and maintenance personnel, and assists in decision-making and maintenance; it can greatly improve work efficiency and reduce operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0041] Figure 2 It is a schematic diagram of the installation structure of the monitoring instrument main body and the mounting frame assembly in the utility model.

[0042] Figure 3 It is a partial cross-sectional view of the positioning base in the utility model.

[0043] Figure 4 It is a schematic diagram of the connection structure between the locking unit and the plug board in the utility model.

[0044] Figure 5 For the utility model Figure 4 A is a partial enlarged view of the

[0045] Figure 6 It is a schematic diagram of the explosion structure of the locking unit in the utility model. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0049] Example 1

[0050] Reference Figure 1 to Figure 6 , which is the first embodiment of the utility model, and this embodiment provides a mounting mechanism, including; a mounting frame assembly 100, including a positioning base 101, and a connecting ear 102 arranged on the side wall of the positioning base 101; a locking unit 200, including a limit block 201, a rack 202 arranged on the end surface of the limit block 201, a limit member 203 arranged above the rack 202, a rotating shaft 204 arranged on the inner side of the limit member 203, and a pushing member 205 arranged at the end of the limit member 203; a plug-in board 300.

[0051] Preferably, the positioning base 101 is a rectangular structure with an open top and a hollow interior; the plug board 300 is fixedly connected to the monitoring instrument body 400, and the position of the monitoring instrument body 400 can be fixed by fixing the plug board 300; the monitoring instrument body 400 can be installed by installing the plug board 300; the plug board 300 itself cancels the bolt fixing method, and the plug board 300 can be fixed by a quick installation method while fixing the position of the monitoring instrument body 400; the positioning base 101 is fixed to the inner side of the distribution cabinet M by a threaded connection, and the current characteristics of the circuit breaker opening and closing coils can be monitored in real time. row monitoring; the locking unit 200 is arranged inside one side of the positioning base 101, and the limit block 201 is welded and fixed to the rack 202; the movement of the rack 202 drives the limit member 203 to rotate, and the rotation of the limit member 203 can engage with the plug-in board 300, thereby completing the fixation of the position of the plug-in board 300; the pushing member 205 can rotate around the tooth end of the limit member 203, which can ensure that the pushing member 205 is inserted into the guide groove 101e, and pushing the pushing member 205 can drive the limit member 203 to move, so that the limit member 203 is away from the plug-in board 300, thereby facilitating the staff to take the plug-in board 300 out from the inside of the positioning base 101.

[0052] When in use, the plug board 300 is inserted into the positioning base 101 along the inner wall of the positioning base 101, and the side wall of the plug board 300 compresses the limit block 201, and the limit block 201 moves to drive the rack 202 to move, and the rack 202 moves to drive the limit member 203 to rotate, and the limit member 203 rotates to drive the shaft 204 to rotate, so that the shaft 204 rotates around the axis direction of the shaft hole; the limit member 203 rotates and is engaged above the block of the plug board 300, ensuring that the plug board 300 cannot move upward, thereby limiting the plug board 300; when it is necessary to release the lock; push the pushing member 205, so that the pushing member 205 drives the limit member 203 to move, and the limit member 203 is away from the plug board 300. At this time, the limit member 203 no longer limits the plug board 300, and the plug board 300 is taken out from the positioning base 101, and the lock of the plug board 300 can be released.

[0053] In summary, by the cooperation between the locking unit 200 and the plug board 300, the plug board 300 can be quickly limited, which can reduce the installation and fixing time to a certain extent, improve work efficiency, and reduce the labor burden of the staff.

[0054] Example 2

[0055] Reference Figures 2 to 6 , which is the second embodiment of the utility model, includes: the positioning base 101 includes a cavity 101a arranged inside it, slide grooves 101b arranged on both sides of the bottom of the cavity 101a, a moving groove 101c arranged above the cavity 101a, a through groove 101d arranged on the end surface of the positioning base 101, a guide groove 101e arranged on one side of the through groove 101d, and shaft holes arranged on both sides above the cavity 101a; the cavity 101a is connected with the moving groove 101c;

[0056] The limit block 201 includes sliders 201a arranged on both sides thereof, and a first spring 201b arranged on the end surface of the limit block 201; the limit block 201 is inside the cavity 101a; the sliders 201a match with the slide groove 101b; the sliders 201a and the slide groove 101b are slidably connected.

[0057] Preferably, the limit block 201 is a right-angled trapezoidal structure; the limit block 201 is located inside the cavity 101a, the slider 201a matches the slide groove 101b, the slider 201a slides along the inside of the slide groove 101b, the limit block 201 passes through the cavity 101a and extends to the inside of the positioning base 101; the sliding connection between the slider 201a and the slide groove 101b can limit the movement trajectory of the limit block 201; one end of the first spring 202b is fixed to the limit block 201, and the other end thereof contacts the side wall of the positioning base 101, and the limit block 201 can be driven to reset by the first spring 201b, which reduces the labor burden of the staff to a certain extent.

[0058] Furthermore, the limiting member 203 includes a gear 203a, a limiting rod 203b arranged on the outer wall of the gear 203a, and a second spring 203c arranged on the end face of the gear 203a; the gear 203a includes a slot 203a-1 arranged on its inner side; the gear 203a is meshed with the rack 202; the rack 202 passes through the through slot 101d and extends to its outer side.

[0059] Preferably, the limit block 201 is welded and fixed to the rack 202, the rack 202 is meshed with the gear 203a, and the movement of the rack 202 can drive the gear 203a to rotate; the limit rod 203b is a bent rod-shaped structure, and the limit rod 203b can clamp the limit member 203 and the plug-in board 300 as the gear 203a rotates; the second spring 203c is set to push the limit member 203 to reset, and one end of the limit member 203 is fixed to the inner wall of the moving groove 101c, and the other end thereof contacts the end face of the gear 203a; the limit member 203 is located inside the moving groove 101c and flipped, and the limit rod 203b can flip to the outside of the moving groove 101c and extend to the inside of the positioning base 101.

[0060] Furthermore, the rotating shaft 204 includes a positioning key 204a disposed on its side wall; the positioning key 204a is clearance-matched with the clamping slot 203a-1; and the rotating shaft 204 rotates inside the shaft hole.

[0061] Preferably, the positioning key 204a is matched with the slot 203a-1, and the positioning key 204a cooperates with the slot 203a-1 so that the limit member 203 can be mounted on the outside of the rotating shaft 204 and rotate, while ensuring that the limit member 203 can move along the axial direction of the rotating shaft 204; the set shaft hole supports the rotating shaft 204, ensuring that the rotating shaft 204 can rotate along the axial direction of the shaft hole.

[0062] Further, the pusher 205 includes a hinge seat 205a, a hinge rod 205b disposed inside the hinge seat 205a, and a button 205c disposed at the end of the hinge rod 205b; the hinge rod 205b penetrates the through slot 101d and extends outward; the hinge rod 205b cooperates with the guide slot 101e;

[0063] The plug board 300 includes a block 300a disposed on its side wall; the plug board 300 is an L-shaped structure; the limiting rod 203b is adapted to the block 300a.

[0064] Preferably, the hinge seat 205a is welded and fixed to the teeth at the edge of the gear 203a, and the hinge rod 205b and the gear 203a are hinged and rotated through the hinge seat 205a; the hinge rod 205b can rotate at a certain angle, so that it is convenient for the staff to insert the hinge rod 205b into the inner side of the guide groove 101e, so as to facilitate the pushing member 205 to be moved more labor-savingly; the end of the button 205c is provided with an arc-shaped depression, so that the staff can grasp the pushing member 205; the hinge rod 205b extends to the outside of the positioning base 101, so that it is more convenient for the staff to push the pushing member 205 to drive the limit member 203 to move;

[0065] The provided plug board 300 plays a role in supporting the monitoring instrument body 400 , and the provided block 300 a cooperates with the limiting rod 203 b to limit the position of the plug board 300 , thereby ensuring that the plug board 300 is located and fixed inside the positioning base 101 .

[0066] When in use, when installing the monitoring instrument body 400, the staff will place the plug board 300 close to the inner wall of the positioning base 101 and insert it into it; the plug board 300 squeezes the end of the limit block 201 to push the limit block 201 to move, so that the sliders 201a on both sides of the limit block 201 move along the direction of the slide groove 101b. With the continuous squeezing of the plug board 300, the end of the limit block 201 is immersed in the inner side of the positioning base 101. At this time, the slider 201b is limited. The extrusion of the positioning block 201 is in a compressed state; the movement of the limiting block 201 drives the rack 202 to move, the movement of the rack 202 drives the gear 203a to rotate, the rotation of the gear 203a drives the shaft 204 to rotate, and the gear 203a rotates along the axis of the shaft 204; the rotation of the gear 203a drives the limiting rod 203b to rotate, and the limiting rod 203b rotates to the inside of the positioning base 101. At this time, the limiting rod 203 flips to the position above the block 300a, and the limiting rod 203 is rotated to the inside of the positioning base 101. The positioning rod 203 cooperates with the block 300a to complete the fixed position of the plug board 300; when the plug board 300 needs to be released, the hinge rod 205b is rotated to the position corresponding to the guide groove 101e, and then the button 205c is dragged to make the button 205c drive the hinge rod 205b to move, so that the hinge rod 205b moves along the inner side of the guide groove 101e, and the hinge rod 205b moves to drive the gear 201e to rotate. 3a moves, so that the limit rod 203b can be away from one side of the block 300a. As the limit rod 203b moves away from the block 300a, the plug board 300 is no longer restricted, and the staff can take out the plug board 300; then release the hand that drags 205c; as the plug board 300 no longer squeezes the limit block 201, the slider 201b and the second spring 203c are not squeezed and reset, and at the same time drive the limit block 201 and the limit member 203 to reset.

[0067] In summary, by cooperating with each other between the locking unit and the plug-in board, the locking unit can be installed on the inner side of the mounting frame assembly more quickly, which is convenient for the staff to operate, reduces the labor burden of the staff to a certain extent, and improves the work efficiency of the staff.

[0068] Example 3

[0069] This is the third embodiment of the utility model, which further provides a circuit breaker coil current characteristic monitoring device, including: a host computer is integrated with a measurement acquisition conversion module, an A / D conversion module, a DSP digital signal processor, a lithium battery charging management chip, a human-machine display module, a high-precision power supply module, a lithium battery, etc.

[0070] The measurement acquisition conversion module is used to measure the voltage and current of the circuit breaker opening and closing coils, filter the collected analog signals to filter out signals higher than 100 kHz, and transmit the filtered analog signals to the A / D conversion module;

[0071] Furthermore, an A / D conversion module is connected to the measurement acquisition conversion module and is used to convert the analog signal transmitted from the measurement acquisition conversion module into a digital signal;

[0072] Preferably, the DSP digital signal processor is connected to the A / D conversion module and the human-machine display module respectively, and is used to calculate the digital signal of the rotation angle transmitted by the A / D conversion module, and record the waveform, and then compare and analyze it with the historical data stored in the DSP digital signal processor, and send the analysis result to the human-machine display module for display; the DSP digital signal processor is also used to store its calculation and analysis results;

[0073] Furthermore, the lithium battery charging management chip is connected to the human-machine display module and the lithium battery respectively, and is used to manage the charging and discharging of the lithium battery, and send the status of the lithium battery to the human-machine display module for display;

[0074] Preferably, the high-precision power supply module is respectively connected to the lithium battery charging management chip, the A / D conversion module, and the DSP digital signal processor; and is used to control the working voltage supplied to the A / D conversion module and the DSP digital signal processor; for example, the high-precision power supply module provides 5V power to the A / D conversion module, and provides 3.3V and 1.8V to the DSP digital signal processor.

[0075] The measurement acquisition conversion module includes high-precision Hall voltage and current angle sensors; powered by 5V, the sensor has a detection range of ±400V / ±30A, a detection accuracy of ±0.5%FS, and a resolution of 0.1V / 0.01A.

[0076] When the DSP digital signal processor performs calculations, the calculation content includes the current and voltage of the closing and opening coils, and then calculates the impedance change, and combines the spectral characteristics of its change curve with Fourier analysis; the DSP digital signal processor also stores the judgment characteristics, content and solution of the faulty circuit breaker. When compared and analyzed with historical data, it will make a judgment based on the stored fault judgment method, and give a judgment result and a corresponding solution.

[0077] Preferably, the display module is a touch display screen.

[0078] Further, the power adapter: provides DC12V, load current 2A power supply and charging for the device;

[0079] Hall AC / DC voltage sensor; HBV-A5 closed-loop Hall voltage sensor is a high-precision AC / DC voltage sensor that can measure DC, AC, pulse and various irregular waveform voltages under electrical isolation conditions; it has the characteristics of high precision, good linearity, low power consumption and low temperature drift, strong anti-interference and fast response speed.

[0080] Furthermore, the Hall AC and DC current sensor; HSTS016L Hall open-close current sensor, it has the characteristics of light weight, low power consumption, good linearity, easy to use, no insertion loss, fast response time, good anti-interference ability, etc., and open-loop open-close type, hanging installation, lead output. Detect DC, AC, pulse current, high insulation between the primary and secondary circuits.

[0081] When using

[0082] 1. Installation during power outage

[0083] 1.1. When the equipment is powered off and in the maintenance position, connect the circuit breaker opening and closing coil control lines to the device coil voltage wiring port in parallel, and clamp the Hall current sensor clamp into the opening and closing control lines;

[0084] 1.2. Connect the power supply of the device, connect the wiring through the empty terminal of the aviation plug, and connect the sensor and the device.

[0085] 2. Online monitoring

[0086] 2.1. Turn on the power of the device, click the "Circuit breaker opening and closing coil characteristic test online monitoring" icon module, enter the test interface, set the rated parameters, and initialize the sensor status;

[0087] 2.2. Select the sudden change automatic or manual start mode. At this time, the circuit breaker is opened and closed. The device collects various sensor parameters when the circuit breaker is in action in real time, samples and records the coil current, coil voltage, coil impedance and spectrum components in real time, compares and judges the data in the horizontal and vertical directions with the standard database, analyzes and judges the singular change point data to give the change characteristics of the circuit breaker, reflects it to the maintenance personnel, and provides maintenance suggestions for the maintenance personnel.

[0088] The analyzer of the present application is not limited to the above structure. After reasonable expansion based on the above structure, the resulting products are all within the protection scope of the present application; for example, a simulation interface, USB interface, debugging interface, etc. connected to the DSP digital signal processor can be added; simulation interface: complete online function expansion debugging; USB interface: complete offline analysis of test data; debugging interface: online collaborative analysis and processing.

[0089] In summary, the device monitors the operation status of the circuit breaker in real time online, compares it with previous situations, automatically predicts the circuit breaker coil status, outputs it graphically to the operation and maintenance personnel, and assists in decision-making and maintenance, which can greatly improve work efficiency and reduce operation and maintenance costs.

[0090] It is important to note that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A mounting mechanism, characterized in that: include, A mounting frame assembly (100) comprises a positioning base (101) and a connecting ear (102) arranged on a side wall of the positioning base (101); A locking unit (200) comprises a limit block (201), a rack (202) arranged on the end surface of the limit block (201), a limit member (203) arranged above the rack (202), a rotating shaft (204) arranged on the inner side of the limit member (203), and a pushing member (205) arranged at the end of the limit member (203); Plug-in board (300); The positioning base (101) and the plug board (300) are connected via the locking unit (200).

2. The mounting mechanism according to claim 1, characterized in that: The positioning base (101) comprises a cavity (101a) arranged inside the positioning base, slide grooves (101b) arranged on both sides of the bottom of the cavity (101a), a movable groove (101c) arranged above the cavity (101a), a through groove (101d) arranged on the end surface of the positioning base (101), a guide groove (101e) arranged on one side of the through groove (101d), and shaft holes arranged on both sides above the cavity (101a); The cavity (101a) is communicated with the moving groove (101c).

3. The mounting mechanism according to claim 2, characterized in that: The limit block (201) comprises sliding blocks (201a) arranged on both sides thereof, and a first spring (201b) arranged on an end surface of the limit block (201); The limit block (201) is inside the cavity (101a); the sliding block (201a) cooperates with the sliding groove (101b); and the sliding block (201a) and the sliding groove (101b) are slidably connected.

4. The mounting mechanism according to claim 3, characterized in that: The limiting member (203) comprises a gear (203a), a limiting rod (203b) arranged on the outer wall of the gear (203a), and a second spring (203c) arranged on the end surface of the gear (203a); The gear (203a) comprises a slot (203a-1) arranged on the inner side thereof; The gear (203a) is meshed with the rack (202); the rack (202) penetrates the through-slot (101d) and extends to the outside thereof.

5. The mounting mechanism according to claim 4, characterized in that: The rotating shaft (204) includes a positioning key (204a) arranged on a side wall thereof; The positioning key (204a) and the card slot (203a-1) are clearance-matched; The rotating shaft (204) rotates inside the shaft hole.

6. The mounting mechanism according to claim 5, characterized in that: The pushing member (205) comprises a hinge seat (205a), a hinge rod (205b) arranged on the inner side of the hinge seat (205a), and a button (205c) arranged on the end of the hinge rod (205b); The hinge rod (205b) passes through the through slot (101d) and extends outward; the hinge rod (205b) cooperates with the guide slot (101e).

7. The mounting mechanism according to any one of claims 4 to 6, characterized in that: The plug board (300) comprises a card block (300a) arranged on a side wall thereof; The plug board (300) is an L-shaped structure; the limiting rod (203b) is adapted to the clamping block (300a).

8. A circuit breaker coil current characteristic monitoring device, characterized in that: comprising the mounting mechanism according to any one of claims 1 to 7; and The monitoring instrument body (400) includes a host and accessories; The host includes a measurement acquisition conversion module, an A / D conversion module, a high-precision power supply module, a DSP digital signal processor and a human-machine interface module; Accessories include power adapter, Hall AC / DC voltage sensor and Hall AC / DC current sensor; The plug board (300) is fixedly connected to the monitoring instrument body (400).

9. The circuit breaker coil current characteristic monitoring device according to claim 8, characterized in that: The measurement acquisition conversion module acquires and measures the voltage and current of the circuit breaker opening and closing coils, performs low-pass filtering and operational amplifier isolation on them, and then sends them to the A / D conversion module; The A / D conversion module performs secondary on-chip integrated filtering on the analog quantity and converts it into a digital quantity; The DSP digital signal processor completes all signal variable calculations, wave recording, historical data comparison, odd variable signal analysis and outputs a test equipment status report.

10. The circuit breaker coil current characteristic monitoring device according to claim 9, characterized in that: The high-precision power module completes the charging and discharging of the portable device and the power statistics, temperature, and charging voltage detection through the lithium battery management chip; The human-machine interface module includes a simulation interface, a USB interface and a debugging interface; The simulation interface completes online function expansion debugging; The USB interface completes offline analysis of test data; The debugging interface performs online collaborative analysis and processing.

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