Automatic detection device for circuit breaker

Abstract

The utility model provides an automatic detection device for a circuit breaker, and belongs to the technical field of motors. According to the utility model, a plurality of placing stations with rubber cover jigs are arranged on the carrying platform of the rack, the pressing actuator corresponding to the placing stations is arranged on the carrying platform through the support, the probe group corresponding to the rubber cover jigs is arranged on the pressing actuator, and the probe group is electrically connected to the detection circuit in the control box. The probe group is driven to move downwards by pressing down the actuator, so that the electrode probes of the probe group are in contact with the contacts of the circuit breakers in the motor rubber cover to be detected on the corresponding rubber cover jig, and the circuit breakers are connected into the detection circuit for detection, so that the simultaneous detection of a plurality of circuit breakers can be realized, and the detection efficiency is improved; and the motor probe can be stably contacted with the contact of the circuit breaker to be detected, so that the problem of detection error caused by poor contact during manual detection is avoided, the detection result is more accurate, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an automatic detection device for a circuit breaker. Background Art

[0002] Motors, as electric drive components, convert electrical energy into kinetic energy and are typically used as the power source for equipment. For example, a car's window motor is a key component in electrically raising and lowering the windows. Its performance directly determines whether the windows function properly. Therefore, ensuring the motor's performance is a crucial consideration for manufacturers.

[0003] Currently, motors on the market typically come with end caps. To increase assembly difficulty and enhance product integrity, integrated circuit boards and other structures are often incorporated into the end caps. For example, patent CN105099086A discloses an end cap assembly structure for a circuit breaker motor. A first fixing seat and a second fixing seat are symmetrically positioned on the front and rear sides of the end cap's axial hole. A positioning frame is positioned between the second fixing seat and the axial hole. An overload protector with overheating and overcurrent protection functions is installed within the positioning frame. One end of the overload protector is electrically connected to the first carbon brush assembly, and the other end is electrically connected to the first electrode of the power supply. The second electrode of the power supply is electrically connected to the second carbon brush assembly. The overload protector is installed within the motor end cap and has a self-recovery function, enhancing the safety and reliability of the motor's operation. This indicates that existing motor caps typically incorporate an overload protector (breaker) for circuit protection, and the breaker can self-recover after the circuit returns to normal, protecting the entire operating circuit. Furthermore, during the manufacturing process, the assembled motor cover needs to be inspected to ensure that the circuit breaker on it meets the operating standards. This is typically done by energizing the circuit breaker. Specifically, the circuit breaker to be inspected is connected to a detection circuit, and the circuit breaker on the existing motor cover is then tested. For example, patent CN212932806U discloses a thermal protector performance and life detection circuit. The thermal protector involved is the aforementioned circuit breaker, comprising an actuator and a control portion. The actuator comprises a voltage regulator, a first relay normally open contact, a motor, and the circuit breaker to be tested, connected in series. A second relay is connected in parallel at both ends of the motor. The control portion comprises a control circuit consisting of a button and the first relay connected in series. The normally open contact of the second relay and a first time relay are connected in parallel at both ends of the control circuit. Furthermore, the normally closed contact of the second relay and a second time relay are connected in parallel at both ends of the control circuit. The normally closed contact of the first time relay is connected to an alarm device, and the normally closed contact of the second time relay is connected to another alarm device. This allows for accurate detection of the tripping and reset temperatures of the thermal protector. However, in actual testing, electrodes are usually manually connected to the circuit breaker to be tested. Not only can only one product be tested at a time, resulting in low testing efficiency, but there is also the problem of accidental power outage or power on due to poor contact caused by external factors such as hand shaking during the testing process, which causes errors in the testing time, resulting in inaccurate test results and affecting product testing. Summary of the Invention

[0004] In response to the above-mentioned problems existing in the prior art, the present invention aims to provide an automatic detection device for circuit breakers, which is configured to set a number of placement stations on a carrier of a frame, and to provide a number of rubber cover jigs corresponding to the placement stations. At the same time, a bracket is provided on the carrier next to the placement stations, and a number of downward pressure actuators corresponding to the placement stations are provided on the bracket, and an electrode probe is provided on each downward pressure actuator, and the electrode probe is electrically connected to the corresponding control box. The motor rubber cover to be tested can be placed in the corresponding rubber cover jig, and the electrode probe is driven downward by the downward pressure actuator to contact the contact of the circuit breaker to be tested on the corresponding motor rubber cover, and the circuit breaker to be tested is connected to the detection circuit to realize detection. This not only realizes the simultaneous detection of multiple circuit breakers, thereby improving the detection efficiency, but also avoids the detection errors caused by human operation factors, thereby improving the accuracy of the detection structure.

[0005] The specific technical solutions are as follows:

[0006] A breaker automatic detection device has the following characteristics, including:

[0007] A frame, wherein a carrier is provided on the frame;

[0008] A plurality of placement stations are arranged on the carrier at intervals along a direction, and each placement station is provided with a plurality of rubber cover jigs, and each rubber cover jig is provided with a placement groove having the same outer contour shape as the motor rubber cover to be tested;

[0009] The bracket is arranged in parallel along the setting direction of the plurality of placement stations, and the lower end of the bracket is mounted on the carrier and is located beside the plurality of placement stations;

[0010] A plurality of pressing actuators, each of which is disposed at the upper end of the bracket, and each of which corresponds one-to-one to a plurality of placement stations, and each of which is provided with a connecting plate, and each of which is provided with a plurality of probe groups corresponding one-to-one to the rubber cover jigs on the corresponding placement stations;

[0011] The control box is arranged on the frame and has a plurality of detection circuits. Each detection circuit corresponds to a probe group, and a plurality of electrode probes of each probe group are electrically connected to the corresponding detection circuit.

[0012] The above-mentioned automatic detection device for circuit breakers, wherein the carrier is a flat plate and is arranged in the middle of the frame, the spaces above and below the carrier on the frame are the test chamber and the electric control chamber respectively, the placement station and the bracket are both arranged in the test chamber, the control box is arranged in the electric control chamber, and the test chamber has an open mouth.

[0013] In the above-mentioned automatic detection device for a breaker, sensing elements are provided on the frame and on both sides of the open opening.

[0014] The above-mentioned automatic detection device for circuit breakers further includes a base plate, a plurality of placement stations and brackets are arranged on the base plate, and the base plate is installed on the carrier.

[0015] The above-mentioned automatic detection device for circuit breakers, wherein the placement station includes side baffles, positioning baffles and a slide plate, the positioning baffle is fixedly installed on the base plate, two parallel and spaced side baffles are provided on one side of the positioning baffle, the slide plate is slidably arranged on the base plate and is located between the baffles on both sides, and several rubber cover jigs corresponding to the placement station are all installed on the slide plate.

[0016] In the above-mentioned automatic detection device for a circuit breaker, recessed sliding grooves are provided at the lower parts of the opposite sides of the two baffles, and the two sides of the slide plate are respectively slidably arranged in the two sliding grooves.

[0017] In the above-mentioned automatic detection device for a breaker, a handle is provided on the slide plate and located on the side away from the positioning bar.

[0018] In the above-mentioned automatic detection device for a circuit breaker, the downward actuator is a telescopic cylinder.

[0019] The above-mentioned automatic detection device for a circuit breaker, wherein each electrode probe includes an insulating sleeve, a probe rod and a spring, the insulating sleeve is fixedly installed on the connecting plate in the vertical direction, the probe rod is slid into the insulating sleeve and both ends extend outside the two ends of the insulating sleeve, the upper end of the probe rod is connected to the wire, and the lower end of the probe rod is provided with a protruding pressure block, the spring is sleeved on the lower end of the probe rod and the two ends respectively abut against the insulating sleeve and the pressure block.

[0020] In the above-mentioned automatic detection device for a breaker, a plurality of groups of indicator lights are provided on the frame, each group of indicator lights is electrically connected to the control box, and a group of indicator lights corresponds to a probe group.

[0021] The positive effects of the above technical solution are:

[0022] The above-mentioned automatic detection device for circuit breakers is provided with a plurality of placement stations on a carrier, and a plurality of plastic shell jigs are provided on each placement station. The plastic shell jig is used to place the plastic shell to be tested so as to achieve stable clamping of the circuit breaker on the plastic shell. At the same time, a bracket is provided on the carrier and is located next to the plurality of placement stations, and a plurality of downward pressure actuators corresponding to the placement stations are provided on the bracket, and a probe group corresponding to the corresponding plastic shell jig is provided on the downward pressure actuator, and the electrode probes of the probe group are electrically connected to the control box. The probe group can be driven downward by the downward pressure actuator, and the electrode probes can contact the contacts of the circuit breaker to be tested to achieve detection. Not only can multiple circuit breakers be tested at the same time, thereby improving the detection efficiency, but also the problem of detection errors caused by poor contact due to manual contact can be avoided, thereby ensuring the accuracy of the detection results and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of an embodiment of a breaker automatic detection device of the present utility model;

[0024] Figure 2 This is an assembly diagram of a placement station, a bracket, and a downward pressing actuator according to a preferred embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a detection circuit according to a preferred embodiment of the present invention;

[0026] Figure 4 for Figure 3 Logic diagram when the detection circuit is used;

[0027] Figure 5 This is a structural diagram of a placement station in a preferred embodiment of the present utility model;

[0028] Figure 6 This is a structural diagram of a motor probe according to a preferred embodiment of the present invention.

[0029] In the accompanying drawings: 1. Frame; 11. Carrier; 2. Placement station; 21. Rubber cover fixture; 22. Side bar; 23. Positioning bar; 24. Slide plate; 25. Handle; 221. Slide groove; 3. Bracket; 4. Press-down actuator; 41. Connecting plate; 42. Probe group; 421. Electrode probe; 4211. Insulating sleeve; 4212. Probe rod; 4213. Spring; 5. Sensing part; 6. Bottom plate; 7. Indicator light. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To the attached Figure 4The technical solution provided by the present invention is described in detail, but the following content is not intended to limit the present invention.

[0031] Figure 1 This is a structural diagram of an embodiment of a breaker automatic detection device of the present utility model; Figure 2 This is an assembly diagram of the placement station, bracket and downward actuator of a preferred embodiment of the utility model. Figure 1 and Figure 2 As shown, the automatic detection device for circuit breakers provided in this embodiment includes: a frame, a placement station 2, a bracket 3, a downward actuator 4 and a control box.

[0032] Specifically, a horizontally arranged carrier 11 is provided on the frame. The carrier 11 is used as an operating platform for detection and also as a mounting carrier for structural parts.

[0033] Specifically, several placement stations 2 are spaced apart along a direction on the carrier 11, and each placement station 2 is provided with several rubber cover jigs 21. This achieves the purpose of arranging multiple rubber cover jigs 21 on the same carrier 11, providing conditions for subsequent simultaneous testing of the circuit breakers on multiple motor rubber covers, thereby improving testing efficiency. In addition, each rubber cover jig 21 is provided with a placement groove that matches the outer contour of the motor rubber cover to be tested. That is, each rubber cover jig 21 can be placed in the corresponding placement groove to achieve stable clamping of the motor rubber cover, ensuring the stable position of the motor rubber cover's circuit breaker during the testing process, thereby ensuring the accuracy of the test results.

[0034] The bracket 3 is arranged parallel to the arrangement direction of the plurality of placement stations 2, so that the bracket 3 can cover all the rubber cover jigs 21 on all the placement stations 2. At the same time, the lower end of the bracket 3 is mounted on the carrier 11, achieving a stable installation of the bracket 3 on the carrier 11. In addition, the bracket 3 is arranged beside the plurality of placement stations 2, so that there is a gap between the bracket 3 and the motor rubber cover to be inspected, thereby facilitating the loading and unloading operations of the motor rubber cover to be inspected, and the structural design is more reasonable.

[0035] Specifically, several push-down actuators 4 are mounted on the upper end of the bracket 3. This bracket 3 provides a mounting surface for the push-down actuators 4, ensuring their stable installation on the platform 11. Furthermore, the push-down actuators 4 are assigned to a number of placement stations 2, ensuring that each placement station 2 has a push-down actuator 4 for operation. Furthermore, each push-down actuator 4 is provided with a connecting plate 41, which expands the mounting surface area of the push-down actuator 4 and facilitates the installation of the probe assembly 42. In addition, each connecting plate 41 is provided with a plurality of probe groups 42 corresponding to the rubber cover jigs 21 on the corresponding placement stations 2, so that each breaker on the motor rubber cover to be tested placed on the rubber cover jig 21 can correspond to a probe group 42, so that when the actuator 4 is pressed down to drive the probe group 42 to move downward, the probe group 42 can contact the contacts of the corresponding breaker, thereby connecting the breaker to the detection circuit, thereby meeting the detection requirements of the breaker, not only convenient operation, but also capable of simultaneously detecting multiple breakers, thereby improving detection efficiency, but also eliminating the problem of inaccurate detection results caused by poor contact due to manual operation, ensuring the accuracy of the detection results, and making the structural design more reasonable.

[0036] More specifically, the control box is mounted on a rack. The control box's circuit board has several detection circuits, each corresponding to a probe set 42. During installation, the electrode probes 421 of each probe set 42 are electrically connected to the corresponding detection circuits, ensuring that the circuit breaker to be tested can subsequently be connected to the corresponding detection circuit via the electrode probes 421, thereby satisfying the circuit breaker detection requirements. It is worth noting that the detection circuits for circuit breakers include, but are not limited to, those described in the background art above. Any circuit breaker that meets the detection requirements will suffice. Therefore, the selection of a specific detection circuit will not be elaborated upon here.

[0037] in addition, Figure 3 A schematic diagram of a detection circuit according to a preferred embodiment of the present invention; Figure 4 for Figure 3 The logic diagram of the detection circuit is shown in Figure 2. Figure 3 and Figure 4As shown, in addition to the detection circuit involved in the above-mentioned background technology, the detection circuit for the breaker in this embodiment can also be another detection circuit. The detection circuit includes a test part and a control part. In this case, the test part uses a 12V power supply, connects the normally open contact of a solid-state relay and the breaker to be tested in series, and then connects the normally closed contact of a 12V relay in parallel to the 12V circuit. The control part uses a 24V power supply, connects the two COM ports of the PLC controller to the two poles of the 24V circuit respectively, and at the same time, connects the normally open contact of the 12V relay between the X port of the PLC controller and the neutral line. Connect the normally closed contacts of the solid-state relay between the 24V incoming line and the Y port of the PLC controller. During the test, press the actuator 4 to drive the probe group 42 to move downward and contact the contacts of the breaker to be tested, so that the test part is turned on. The on-off signal is collected by the 12V relay and transmitted to the PLC controller. The on-off time is collected by the PLC controller to determine whether the tested breaker is qualified. For example, if the off time is in the range of 4 to 10 seconds and the on time is less than 30 seconds, the breaker is judged to be qualified, otherwise it is unqualified. In addition, different models of products can make appropriate data adjustments according to actual needs, which will not be repeated here.

[0038] More specifically, the carrier 11 on the rack is a flat structure. At this time, the carrier 11 is set in the middle of the rack so that the space of the rack can be divided into an upper test chamber and a lower electric control chamber by the carrier 11. During installation, the placement station 2 and the bracket 3 are both set in the test chamber. At this time, the rubber cover fixture 21 on the placement station 2 and the downward actuator 4, probe group 42 and other structures on the bracket 3 are all located in the test chamber, which is convenient for detection operations. In addition, the control box and other electronic control equipment are set in the electronic control chamber to hide the electronic control equipment, meet external protection requirements, and improve safety. In addition, the test chamber on the rack has an open mouth to facilitate the operator to perform loading and unloading operations.

[0039] More specifically, sensing elements 5 are provided on the frame, located on both sides of the opening. These sensing elements 5 can be photoelectric sensors, which can pause the test if blocked by the operator's arm, ensuring that no safety hazards exist within the test space during the test, thus enhancing safety assurance. It is worth noting that photoelectric sensors are commonly used safety detection mechanisms on the market and can be purchased and installed directly. Therefore, their specific structure and control are not detailed here.

[0040] More specifically, a base plate 6 is also provided on the carrier 11. At this time, several placement stations 2 and brackets 3 are arranged on the base plate 6. The placement stations 2 and brackets 3 are combined into an integral structure through the base plate 6, so that the structure used for testing on the carrier 11 is modularly arranged. When it is subsequently changed to test other products, the corresponding test structure can be directly replaced as a whole, which is more convenient to operate.

[0041] Figure 5 This is a structural diagram of a placement station of a preferred embodiment of the utility model. Figure 1 、 Figure 2 as well as Figure 5 As shown, each placement station 2 includes side bars 22, positioning bars 23 and slide plates 24. During installation, the positioning bars 23 are fixed on the base plate 6, and two parallel and spaced side bars 22 are provided on one side of the positioning bar 23, and the two side bars 22 are respectively located at the two ends of the positioning bar 23, so that there is a larger space between the two side bars 22. In addition, the slide plate 24 is slidably set on the base plate 6 and is located between the two side bars 22, so that the slide plate 24 can slide between the two side bars 22 after being placed on the base plate 6, and is guided by the two side bars 22 during the sliding process. At the same time, after the slide plate 24 slides into place, it abuts against the positioning bar 23, so that the three sides of the slide plate 24 have a limiting structure, thereby limiting the movement of the slide plate 24 on the base plate 6 and maintaining the stability of the slide plate 24 after it is installed in place. In addition, several rubber cover jigs 21 corresponding to the placement station 2 are all installed on the slide plate 24, thereby ensuring the stability of the circuit breaker to be tested during testing, and different rubber cover jigs 21 can be replaced by pulling out the slide plate 24 to meet the testing requirements of different motor rubber covers.

[0042] More specifically, recessed slide grooves 221 are provided at the lower portion of the opposite side of the two side bars 22, and the two sides of the slide plate 24 are slidably arranged in the two slide grooves 221, so that the slide plate 24 can not only be guided by the slide grooves 221, but also be pressed by the structure on the upper portion of the slide grooves 221, thereby maintaining the stability of the vertical position of the slide plate 24, and the structural design is more reasonable.

[0043] More specifically, a handle 25 is provided on the slide plate 24 and on a side away from the positioning bar 23 , so that an operator can pull the slide plate 24 through the handle 25 , making the operation more convenient.

[0044] More specifically, the downward actuator 4 for driving the probe group 42 to move downward is preferably a telescopic cylinder, which has a simple structure and is easy to use, and the power medium is air, which has low cost and is pollution-free.

[0045] Figure 6 This is a structural diagram of an electrode probe according to a preferred embodiment of the present invention. Figure 2 and Figure 6As shown, each electrode probe 421 of the probe group 42 includes an insulating sleeve 4211, a probe rod 4212 and a spring 4213. During installation, the insulating sleeve 4211 is fixedly installed on the connecting plate 41 in the vertical direction, thereby achieving mutual insulation between the several electrode probes 421 installed on the connecting plate 41 and avoiding detection interference problems. At the same time, the probe rod 4212 is slid into the insulating sleeve 4211 and both ends extend outside the two ends of the insulating sleeve 4211, and the upper end of the probe rod 4212 is connected to the wire to connect to the detection circuit, and a protruding pressure block is provided at the lower end of the probe rod 4212. Preferably, the pressure block and the probe rod 4212 are an integrated structure, and the spring 4213 is sleeved on the lower end of the probe rod 4212 and the two ends are respectively against the insulating sleeve 4211 and the pressure block. The spring 4213 realizes the floating installation of the probe rod 4212 on the insulating sleeve 4211, so that the probe rod 4212 will not be crushed when it contacts the contacts of the circuit breaker to be detected, and the structural design is more reasonable.

[0046] More specifically, several groups of indicator lights 7 are provided on the frame, and each group of indicator lights 7 is electrically connected to the control box. At the same time, one group of indicator lights 7 corresponds to one probe group 42, that is, each rubber cover jig 21 corresponds to one group of indicator lights 7, so that when the breaker in the motor rubber cover placed on the rubber cover jig 21 is tested, it can be judged by the changes in the indicator lights 7 whether the test results of the product meet the requirements, which can be reflected more intuitively and the structural design is more reasonable.

[0047] The automatic detection device for circuit breakers provided in this embodiment includes a frame, a placement station 2, a bracket 3, a pressing actuator 4 and a control box; a plurality of placement stations 2 with rubber cover jigs 21 are arranged on the carrier 11 of the frame, and a pressing actuator 4 corresponding to the placement station 2 is installed on the carrier 11 through the bracket 3, and a probe group 42 corresponding to the rubber cover jig 21 is arranged on the pressing actuator 4, and the probe group 42 is electrically connected to the detection circuit in the control box, and the probe group 42 is driven downward by the pressing actuator 4, so that the electrode probe 421 of the probe group 42 contacts the contact of the circuit breaker in the motor rubber cover to be detected on the corresponding rubber cover jig 21, and the circuit breaker is connected to the detection circuit for detection, which not only can realize the simultaneous detection of multiple circuit breakers, thereby improving the detection efficiency, but also can make the motor probe stably contact the contact of the circuit breaker to be detected, avoiding the problem of detection error caused by poor contact during manual detection, and the detection result is more accurate, thereby ensuring product quality.

[0048] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A breaker automatic detection device, characterized in that: include: A frame, wherein a carrier is provided on the frame; A plurality of placement stations, wherein the plurality of placement stations are spaced apart along a direction on the carrier, and each of the placement stations is provided with a plurality of rubber cover jigs, and each of the rubber cover jigs is provided with a placement groove having the same outer contour shape as the motor rubber cover to be inspected; A bracket, wherein the bracket is arranged in parallel along the setting direction of the plurality of placement stations, and the lower end of the bracket is mounted on the carrier and is located beside the plurality of placement stations; A plurality of pressing actuators, each of which is disposed at the upper end of the bracket, and each of which corresponds one-to-one to the plurality of placement stations, and each of which is provided with a connecting plate, each of which is provided with a plurality of probe groups corresponding one-to-one to the rubber cover jigs on the corresponding placement stations; A control box is provided on the frame, and has a plurality of detection circuits, each of which corresponds to a probe group, and a plurality of electrode probes of each probe group are electrically connected to the corresponding detection circuit.

2. The automatic detection device for circuit breakers according to claim 1, characterized in that: The carrier is a flat plate and is arranged in the middle of the frame. The spaces above and below the carrier on the frame are respectively a test chamber and an electric control chamber. The placement station and the bracket are both arranged in the test chamber, the control box is arranged in the electric control chamber, and the test chamber has an open mouth.

3. The automatic detection device for circuit breakers according to claim 2, characterized in that: Induction components are provided on the frame and on both sides of the open opening.

4. The automatic detection device for circuit breakers according to claim 1, characterized in that: It also includes a base plate, a plurality of the placement stations and the brackets are arranged on the base plate, and the base plate is installed on the carrier.

5. The automatic detection device for circuit breakers according to claim 4, characterized in that: The placement station includes side bars, positioning bars and a slide plate. The positioning bar is fixedly mounted on the base plate. Two parallel and spaced-apart side bars are provided on one side of the positioning bar. The slide plate is slidably mounted on the base plate and located between the two side bars. Several of the rubber cover jigs corresponding to the placement station are mounted on the slide plate.

6. The automatic detection device for circuit breakers according to claim 5, characterized in that: The lower parts of the two side guard bars on the opposite sides are both provided with recessed sliding grooves, and the two sides of the slide plate are respectively slidably arranged in the two sliding grooves.

7. The automatic detection device for circuit breakers according to claim 5 or 6, characterized in that: A handle is provided on the slide plate and located on a side away from the positioning bar.

8. The automatic detection device for circuit breakers according to claim 1, characterized in that: The downward pressing actuator is a telescopic cylinder.

9. The automatic detection device for circuit breakers according to claim 1, characterized in that: Each of the electrode probes includes an insulating sleeve, a probe rod and a spring. The insulating sleeve is fixedly mounted on the connecting plate in the vertical direction. The probe rod is slid in the insulating sleeve and both ends extend outside the two ends of the insulating sleeve. The upper end of the probe rod is connected to the wire, and the lower end of the probe rod is provided with a protruding pressure block. The spring is sleeved on the lower end of the probe rod and its two ends respectively abut against the insulating sleeve and the pressure block.

10. The automatic detection device for circuit breakers according to claim 1, characterized in that: The rack is provided with a plurality of groups of indicator lights, each group of the indicator lights is electrically connected to the control box, and one group of the indicator lights corresponds to one probe group.

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