Detector for electric switch machine

Abstract

The utility model discloses a detector for an electric switch machine, which belongs to the technical field of electric switch machine detection, and is characterized in that an external interface consisting of a control contact, a cable interface and a power interface is arranged on a casing of the detector; a relay control circuit, a rectifier bridge circuit, a constant and reverse position detection circuit, a current detection circuit and a fault alarm circuit are arranged in the detector, and the relay control circuit and the rectifier bridge circuit provide control signals needed by the detector. The constant-reverse-position detection circuit and the current detection circuit can detect the constant-reverse-position conversion state and the working current state of the electric switch machine respectively, then debugging of related performance and adjustment of related structures of the electric switch machine can be achieved, in addition, the cable interface can be connected with a terminal of a cable box or a terminal of a wire distributing plate, and therefore the electric switch machine is convenient to use. The circuit from the indoor branching terminal to the detected electric switch machine is subjected to segmented detection, construction personnel are helped to remove line faults, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electric switch machine testing technology, and in particular relates to a testing instrument for electric switch machines. Background Technology

[0002] An electric switch machine is a switching device used to change turnouts on railway station lines. It is a key piece of equipment for controlling train running paths. During railway station construction, the installation, commissioning, and fault detection of electric switch machines have a significant impact on project quality and progress. Currently, the relevant circuits of the electric switch machine usually need to be adjusted and tested before the indoor interlocking control equipment is put into use. The current testing method usually involves manual testing with a multimeter, which is not only inefficient but also has a high error rate. Therefore, there is a lack of testing instruments that can drive the electric switch machine on-site to adjust the relevant turnouts for commissioning and testing the indoor and outdoor circuit connections of the electric switch machine. Utility Model Content

[0003] The purpose of this invention is to provide a testing instrument for electric switch machines, which aims to solve the problem that there is a lack of equipment for debugging and testing the relevant performance of electric switch machines before the indoor interlocking control equipment is put into use. This testing instrument can detect the working status and faults of electric switch machines, and also has a self-protection function.

[0004] This application provides a detector for an electric switch machine, comprising a housing. The housing is provided with an external interface consisting of control contacts, a cable interface, and a power interface. The housing also includes a relay control circuit, a rectifier bridge circuit that provides DC power, a position / reverse switching detection circuit for detecting the position / reverse switching status of the electric switch machine, a current detection circuit for detecting the operating current of the electric switch machine, and a fault alarm circuit.

[0005] As a preferred embodiment of this application: the relay control circuit includes a miniature relay and a bias relay. The miniature relay serves as a driving element for switching the current detection circuit and the fault alarm circuit. The bias relay serves as an actuating element for controlling the on / off state of the positioning and reversing circuits in the positioning and reversing detection circuit, that is, controlling the positioning and reversing operation actions.

[0006] As a preferred embodiment of this application, the miniature relay is of model HH63P or LY3NJ and is powered by a DC power supply module.

[0007] As a preferred embodiment of this application: the rectifier bridge circuit is composed of diodes D1, D2, D3, D4 and filter capacitor C1, which is used to rectify the input 220V AC voltage into DC voltage to provide DC power for subsequent circuits.

[0008] As a preferred embodiment of this application: the positioning and reversing detection circuit includes a positioning indicator D9, a reversing indicator D10, and current resistors R1 and R2. When the electric switch machine is in the positioning state, the positioning indicator D9 is lit; when the electric switch machine is in the reversing state, the reversing indicator D10 is lit.

[0009] As a preferred embodiment of this application: the current detection circuit includes a current acquisition circuit and a timing circuit. The current acquisition circuit includes an ammeter A, which is connected in series in the electric switch machine circuit to display the operating current of the electric switch machine in real time. The timing circuit includes diodes D5 and D6 connected in series and optocoupler IC1. At the same time, a timer IC2 is connected in series at the output terminal of optocoupler IC1. The current signal is isolated by diodes D5 and D6 and optocoupler IC1 and transmitted to timer IC2. Timer IC2 is used to detect the switching time of the electric switch machine.

[0010] As a preferred embodiment of this application: the fault alarm circuit includes an indicator light D11, which illuminates when the electric switch machine malfunctions.

[0011] As a preferred embodiment of this application: the cable interface includes four connecting cables, and the cable connectors X1, X2, X3 and X4 of the four connecting cables are adapted to the terminals of the cable box and the junction box of the electric switch machine; wherein, connector X1 is used to send the DC positive voltage processed by the rectifier bridge circuit to the motor forward rotation circuit of the electric switch machine, connector X2 is used to send the DC positive voltage processed by the rectifier bridge circuit to the motor reverse rotation circuit of the electric switch machine, connector X3 is used to send the AC indicating voltage to the indicating circuit of the electric switch machine to provide a power supply for the fixed and reverse position indicating lights in the indicating circuit; connector X4 is used to send the DC negative voltage processed by the rectifier bridge circuit to the starting circuit of the electric switch machine.

[0012] As a preferred embodiment of this application, the control contacts include a positioning control contact, a reversing control contact, and a reset contact.

[0013] As a preferred embodiment of this application, the dimensions of the housing are 120×165×68mm.

[0014] Compared with existing technologies, the advantages of this application are:

[0015] The electric switch machine circuit tester has an external interface consisting of control contacts, a cable interface, and a power interface on its casing. Internally, it includes a relay control circuit, a rectifier bridge circuit, a position / reverse detection circuit, a current detection circuit, and a fault alarm circuit. The relay control circuit and rectifier bridge circuit provide the necessary control signals to the tester. The position / reverse detection circuit and current detection circuit can detect the position / reverse switching status and operating current status of the electric switch machine, respectively, thereby enabling the debugging of related performance and adjustment of related structures. Furthermore, the cable interface of this solution can connect to the terminals of a cable box or a junction box to perform segmented testing of the circuit from the indoor junction terminal to the tested electric switch machine, helping construction personnel troubleshoot line faults and improving testing efficiency. Therefore, this tester can automatically detect the cable path and internal operating and indicating circuits of the electric switch machine on-site, thereby enabling the adjustment of the turnout contact, indication, and friction current pulled by the electric switch machine, solving existing problems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the electric switch machine detector provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the electric switch machine detector provided in an embodiment of the present invention.

[0018] Figure 3 The detection principle diagram of the electric switch machine detector provided in the embodiment of this utility model.

[0019] Figure Labels

[0020] 1-Chassis; 2-Ammeter; 3-Positioning control button; 4-Positioning indicator light; 5-Reverse position control button; 6-Reverse position indicator light; 7-Reset button; 8-Fault indicator light; 9-Power interface; 10-Cable interface;

[0021] 12-Relay control circuit; 13-Rectifier bridge circuit; 14-Positioning / reversing detection circuit; 15-Current detection circuit; 16-Fault alarm circuit;

[0022] A represents an ammeter; DCA represents a positioning control button; FCA represents a reversing control button; FUA represents a reset button; GD represents a fault indicator light; DLJ represents a miniature relay; QDJ represents a bias relay; D1-D8 represent diodes; D9-D11 represent light-emitting diodes; IC1 represents an optocoupler; IC2 represents a timer; C1-C3 represent capacitors; R1-R4 represent resistors. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0024] In the description of this utility model, it should be understood that the terms "upper end", "bottom", "upper", "lower", "outer side", "inner side", etc., which indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or mechanism referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this utility model; at the same time, in the description of this utility model, the meaning of "at least" includes one, two, and more than two.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "fixed", "connected", "installed", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a relative rotatable connection, an integral connection, a direct connection, or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] This embodiment provides a testing instrument for electric switch machines, such as... Figure 1-2 As shown, the device includes a housing 1, the preferred dimensions of which are 120×165×68mm for easy on-site transport. The housing 1 is equipped with control contacts, a cable interface 10, and a power interface 9. The control contacts, cable interface 10, and power interface 9 extend to the outside of the housing 1 to form an external interface. Inside the housing 1, there is a relay control circuit 12, a rectifier bridge circuit 13 that provides DC power, a position / reverse switching detection circuit 14 that detects the position / reverse switching status of the electric switch machine, a current detection circuit 15 that detects the operating current of the electric switch machine, and a fault alarm circuit 16.

[0027] The housing 1 should be provided with a peripheral structure corresponding to the peripheral interface. Specifically, it should be provided with control buttons corresponding to the control contacts, which form the control panel of the detector. In this embodiment, the control contacts preferably include positioning control contacts, reversing control contacts, and reset contacts. Correspondingly, the control buttons include a fixed control button DCA, a reversing control button FCA, and a reset button 7FUA. A power cable corresponding to the power interface 9 is provided, which is used to connect to a 220V, 50HZ mains power supply. A data transmission cable corresponding to the cable interface 10 is provided, which is used to connect to the corresponding terminal of the electric switch machine.

[0028] The cable interface 10 includes four connecting cables. The cable connectors X1, X2, X3, and X4 of these four connecting cables are adapted to the terminals of the cable box and the junction box of the electric switch machine. That is, the cable interface 10 can be connected to the terminals of the cable box or the junction box to perform segmented testing of the circuit from the indoor junction terminal to the electric switch machine under test, helping construction personnel to troubleshoot line faults and improve testing efficiency.

[0029] Connector X1 is used to send the positive DC voltage processed by rectifier bridge circuit 13 to the forward rotation circuit of the electric switch machine. It should be noted that the motor in the electric switch machine is connected to the switch point rail to drive the switch point rail to move and realize the positioning and reversing of the switch. Connector X2 is used to send the positive DC voltage processed by rectifier bridge circuit 13 to the reverse rotation circuit of the electric switch machine to provide power for the motor to reverse. Connector X3 is used to send AC voltage to the indicator circuit of the electric switch machine to provide power for the positioning and reversing indicator lights 6 in the indicator circuit. After the positioning conversion of the electric switch machine is completed, the green positioning indicator light inside the electric switch machine is lit. After the reversing conversion of the electric switch machine is completed, the yellow reversing indicator light inside the electric switch machine is lit. Connector X4 is used to send the negative DC voltage processed by rectifier bridge circuit 13 to the starting circuit of the electric switch machine.

[0030] The relay control circuit 12 and rectifier bridge circuit 13 provide the necessary control signals (switching signals, current signals, etc.) to the detector. The position / reverse detection circuit 14 and current detection circuit 15 can detect the position / reverse conversion status and working current status of the electric switch machine, thereby realizing the detection of related performance of the electric switch machine and the adjustment of related structures (adjusting the turnout, adjusting the positioning direction indicator rod, adjusting the contact adjustment rod, etc.). In this embodiment, the position / reverse conversion status includes the position / reverse conversion status, indicator light display status, conversion time status, etc. The working current status is reflected by the magnitude of the acquired working current, that is, whether the acquired working current is within the preset range. It can be seen that the detector of this solution can automatically detect the cable path of the electric switch machine and its internal operating circuit and indication circuit on site, thereby realizing the adjustment of the contact, indication and friction current of the turnout pulled by the electric switch machine, solving the existing problems.

[0031] like Figure 3 The diagram shown is a schematic diagram of the detection principle of the detector provided in this embodiment:

[0032] The relay control circuit 12 includes a miniature relay DLJ and a bias relay QDJ. The miniature relay DLJ serves as a driving element, used to switch the current detection circuit 15 and the fault alarm circuit 16. The bias relay QDJ serves as an actuating element, used to control the on / off state of the positioning and reversing circuits in the positioning and reversing detection circuit 14, that is, to control the positioning and reversing operation actions. In this embodiment, the miniature relay DLJ is of model HH63P or LY3NJ and is powered by a 12V DC power supply module. In this embodiment, the 12V DC power supply module is preferably a rechargeable module, which is connected to the power interface 9 through a power conversion module, that is, the 220V AC mains power is converted to 12V DC power through power conversion.

[0033] The rectifier bridge circuit 13 consists of diodes D1, D2, D3, D4 and filter capacitor C1, used to rectify the input 220V AC voltage into DC voltage to provide DC power for subsequent circuits. In this embodiment, the rectifier bridge circuit 13 is led out to cable interfaces X1 and X2 through relays 1QDJ and 2QDJ. By controlling the on and off of relays 1QDJ and 2QDJ, the DC power rectified by the rectifier bridge circuit 13 can be delivered to the corresponding cable port to provide a power supply for the forward or reverse rotation circuit of the electric switch machine.

[0034] The positioning and reversal detection circuit 14 includes a positioning indicator D9, a reversal indicator D10, and current resistors R1 and R2. Figure 3 It can be seen that the positioning and reversing detection circuit 14 forms a positioning detection circuit and a reversing detection circuit through the second contact of the relay 2QDJ. The positioning detection circuit and the reversing detection circuit are connected to the positioning circuit and the reversing circuit of the electric switch machine through cable connectors X1 and X2. When the electric switch machine is in the positioning state, the positioning indicator D9 is lit; when the electric switch machine is in the reversing state, the reversing indicator D10 is lit.

[0035] The current detection circuit 15 includes a current acquisition circuit and a timing circuit. The current acquisition circuit includes an ammeter (A) 2, which is connected in series in the electric switch machine circuit to display the operating current of the electric switch machine in real time. The timing circuit includes diodes D5 and D6 connected in series and optocoupler IC1. At the same time, a timer IC2 (NE555) is connected in series at the output of optocoupler IC1. The current signal is isolated into an electrical signal by diodes D5 and D6 and optocoupler IC1 and then transmitted to timer IC2. Timer IC2 is used to detect the switching time of the electric switch machine.

[0036] Specifically, based on the current value displayed by ammeter (A)2, determine whether the electric switch machine has problems such as circuit faults, overload, turnout jamming, or short circuit in the internal starting circuit. At the same time, use timer IC2 to check whether the turnout jamming, turnout contact adjustment rod, or indicator rod is adjusted to the correct position after 3 seconds. If so, and the fixed or reverse position indicator light 6 is yellow, it means that the fixed or reverse position indicator rod of the electric switch machine is adjusted to the correct position and the internal indicator circuit is normal. If not, it means that the fixed or reverse position indicator rod of the electric switch machine is not adjusted to the correct position or the internal indicator circuit is faulty. It is necessary to adjust the fixed or reverse position indicator rod of the electric switch machine or check the internal reverse position indicator circuit of the switch machine.

[0037] The fault alarm circuit 16 includes an indicator light D11. In this embodiment, the indicator light D11 and the reset button 7 (FUA) form a protection circuit. When the electric switch machine malfunctions, the fault indicator light D11 will light up. At this time, the operator should press the reset button 7 (FUA) in time to stop the electric switch machine from running and prevent the motor from being burned out.

[0038] The specific usage method of this detector on the ZD6 electric switch machine is as follows:

[0039] (a) Inspection and adjustment of the internal circuits of the electric switch machine and the connected turnouts.

[0040] 1. Remove the four control cables connected to the electric switch machine from the terminal block in the cable box of the ZD6 electric switch machine, and connect the four connectors X1, X2, X3, and X4 of the tester's connecting cable to the corresponding terminals in the cable box of the electric switch machine.

[0041] 2: Plug the power cord of the detector into the power strip and turn on the power switch.

[0042] 3. Press the DCA button. The corresponding contacts of the bias relays 1QDJ and 2QDJ in the detector will be activated, thus sending the rectified DC 220V positive power supply from the rectifier bridge circuit 13 to the forward rotation circuit of the electric switch machine motor via connector X1. After passing through the electric switch machine motor, the power supply returns to connector X4 of the detector to obtain DC 220V negative power, thus forming a loop. Since the current acquisition circuit is connected in series in the line where connector X4 is located, if ammeter A does not indicate anything during this process, it means that the positioning and starting circuit from the cable box to the switch machine is not connected, indicating a broken wire fault. The internal positioning and starting circuit of the electric switch machine can be checked for faults. If ammeter A shows a current greater than 2.5A, it indicates that the electric switch machine is overloaded and the turnout is jammed, requiring further investigation. Check and adjust the turnout; if ammeter A shows a current exceeding the range, it indicates a short circuit in the switch machine's starting circuit, requiring inspection of the internal starting circuit; if ammeter A shows approximately 1.8A, it indicates the internal motor forward rotation circuit of the switch machine is normal; after 3 seconds, the electric switch machine pulls the turnout to its position. Once in position, the 1QDJ indicator inside the detector drops, cutting off the internal motor circuit of the electric switch machine, and the electric switch machine stops rotating. If the positioning indicator light 4 on the detector is green, it indicates the electric switch machine's positioning direction indicator rod is properly adjusted and the internal indicator circuit is normal; otherwise, it indicates the electric switch machine's positioning direction indicator rod is not properly adjusted or the internal indicator circuit is faulty, requiring adjustment of the electric switch machine's positioning direction indicator rod or inspection of the internal positioning indicator circuit.

[0043] 4. Press the reverse operation button FCA. The bias relays 1QDJ and 2QDJ in the detector will be activated and deactivated. The 220V positive DC power supply is supplied from connector X2 to the reverse circuit of the electric switch machine motor through the contacts of 1QDJ activation and 2QDJ deactivation. After passing through the electric switch machine motor, the power returns to connector X4 of the detector to obtain a 220V negative DC power supply, thus forming a loop. Since the current detection circuit 15 is connected in series in the circuit where connector X4 is located, if ammeter A does not indicate anything during this process, it indicates that the reverse start circuit from the cable box to the switch machine is not continuous, indicating a broken wire fault. The internal reverse start circuit of the switch machine should be checked to troubleshoot the fault. If ammeter A shows a current greater than 2.5A, it indicates that the switch machine is overloaded and the turnout is jammed, requiring further investigation. Check and adjust the turnout; if ammeter A shows a current exceeding the range, it indicates a short circuit in the switch machine's starting circuit, requiring inspection of the internal starting circuit; if ammeter A shows approximately 1.8A, it indicates the internal motor reversing circuit of the switch machine is normal; after 3 seconds, the electric switch machine pulls the turnout to the reverse position, and the 1QDJ sensor inside the detector is lowered to disconnect the internal motor circuit of the electric switch machine, stopping the electric switch machine from rotating. If the reverse position indicator light 6 on the detector is yellow, it indicates the reverse direction indicator lever of the electric switch machine is properly adjusted and the internal indicator circuit is normal; otherwise, it indicates the reverse direction indicator lever of the electric switch machine is not properly adjusted or the internal indicator circuit is faulty, requiring adjustment of the reverse direction indicator lever or inspection of the internal reverse direction indicator circuit of the switch machine.

[0044] 5: If the electric switch machine cannot be shut off due to the connected turnout being blocked or the adjustment rod and indicator rod not being properly adjusted during fixed and reverse operation, resulting in the electric switch machine motor running for more than 13 seconds, the timing circuit will be activated and the fault indicator light GD on the detector panel will light up red. At this time, the operator should press the reset button FUA to stop the electric switch machine and prevent the motor from burning out.

[0045] 6. After all the adjustment rods and indicator rods of the turnout connected to the electric switch machine have been adjusted, and the start-up and indicator circuits for both fixed and reverse positions have been tested, the locking status of the turnout can be checked and the friction current of the electric switch machine can be set. Place a 4mm thick steel plate between the turnout switch rail and the stock rail, and operate the turnout to clamp the steel plate. If the switch machine automatically cuts off the internal starting circuit and the motor stops rotating, it indicates that the turnout locking adjustment is not in place and the turnout is not locked within 4mm. There is a risk of derailment when a train passes through the turnout, and the turnout locking adjustment needs to be readjusted. The lever ensures a tight fit between the switch point rail and the stock rail. If the switch with a 4mm steel plate clamped between it does not automatically cut off the internal starting circuit and the motor keeps running, it indicates that the switch has met the 4mm non-locking requirement and the switch tightness adjustment is qualified. If a 4mm steel plate is clamped between the switch point rail and the stock rail, and the switch cannot be switched into position, the electric switch machine motor will keep running. At this time, adjust the adjusting nut on the friction connector of the electric switch machine so that the ammeter A displays about 2.5A. Then, operate the electric switch machine in the opposite direction and remove the steel plate. The current set at 2.5A is the friction current of the electric switch machine.

[0046] (ii) Inspection of control cable lines for electric switch machines

[0047] 1. Locate a cable box in the middle of the switch machine's cable line. Disconnect the four cables from the control room direction from the terminal blocks. Connect the four connectors of the tester's connecting cable (X1, X2, X3, X4) to the corresponding terminals in the cable box. Press the DCA positioning control button or the FCA reversing control button to control the electric switch machine's position switching. If the electric switch machine's position switching is normal, and the position and reversing indicators are also normal, it indicates that the cable line wiring between the cable box and the switch machine under test is correct. Otherwise, it indicates that the cable line wiring between the cable box and the electric switch machine under test is incorrect.

[0048] 2. After confirming that the cable line from the intermediate cable box to the electric switch machine is normal, disconnect the four external wires from the switch terminal to the turnout starting circuit assembly on the indoor distribution panel. Connect the four connectors of the tester's connecting cable X1, X2, X3, and X4 to the corresponding terminals of the switch terminal. Press the DCA or FCA button to control the switch machine's position switching. If the electric switch machine's position switching is normal, and the position and reverse indications are also normal, it indicates that the cable line wiring between the switch terminal and the intermediate cable box is correct. Otherwise, it indicates that the cable line wiring between the switch terminal and the intermediate cable box is incorrect.

[0049] By using a segmented testing method, the entire circuit from the indoor branch terminal to the electric switch machine under test can be tested, which can help construction personnel troubleshoot line faults and improve the efficiency of equipment continuity testing.

[0050] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various improvements without departing from this utility model, and these improvements should also be considered within the scope of protection of this utility model. These improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of the claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A testing instrument for an electric switch machine, characterized in that: The device includes a housing, on which is provided an external interface consisting of control contacts, a cable interface, and a power interface. Inside the housing are a relay control circuit, a rectifier bridge circuit that provides DC power, a position / reverse switching detection circuit that detects the position / reverse switching status of the electric switch machine, a current detection circuit that detects the operating current of the electric switch machine, and a fault alarm circuit.

2. The detector for electric switch machines according to claim 1, characterized in that: The relay control circuit includes a miniature relay and a bias relay. The miniature relay serves as a driving element to switch between the current detection circuit and the fault alarm circuit. The bias relay serves as an actuating element to control the on / off state of the positioning and reversing circuits in the positioning and reversing detection circuit, that is, to control the positioning and reversing operation actions.

3. The detector for electric switch machines according to claim 2, characterized in that: The miniature relay is of model HH63P or LY3NJ and is powered by a DC power supply module.

4. The detector for an electric switch machine according to claim 1, characterized in that: The rectifier bridge circuit consists of diodes D1, D2, D3, D4 and filter capacitor C1, which is used to rectify the input 220V AC voltage into DC voltage to provide DC power for subsequent circuits.

5. The detector for an electric switch machine according to claim 1, characterized in that: The positioning and reversing detection circuit includes a positioning indicator D9, a reversing indicator D10, and current resistors R1 and R2. When the electric switch machine is in the positioning state, the positioning indicator D9 is lit; when the electric switch machine is in the reversing state, the reversing indicator D10 is lit.

6. The detector for an electric switch machine according to claim 1, characterized in that: The current detection circuit includes a current acquisition circuit and a timing circuit. The current acquisition circuit includes an ammeter A, which is connected in series in the electric switch machine circuit to display the operating current of the electric switch machine in real time. The timing circuit includes diodes D5 and D6 connected in series and optocoupler IC1. At the same time, a timer IC2 is connected in series at the output of optocoupler IC1. The current signal is isolated by diodes D5 and D6 and optocoupler IC1 and transmitted to timer IC2. Timer IC2 is used to detect the switching time of the electric switch machine.

7. The detector for an electric switch machine according to claim 1, characterized in that: The fault alarm circuit includes an indicator light D11, which illuminates when the electric switch machine malfunctions.

8. The detector for an electric switch machine according to claim 1, characterized in that: The cable interface includes four connecting cables, whose connectors X1, X2, X3, and X4 are adapted to the terminals of the electric switch machine cable box and the junction box. Connector X1 is used to send a positive DC voltage processed by the rectifier bridge circuit to the forward rotation circuit of the electric switch machine; connector X2 is used to send a positive DC voltage processed by the rectifier bridge circuit to the reverse rotation circuit of the electric switch machine; connector X3 is used to send an AC indicator voltage to the indicator circuit of the electric switch machine, providing a power supply for the fixed and reverse position indicator lights in the indicator circuit; and connector X4 is used to send a negative DC voltage processed by the rectifier bridge circuit to the starting circuit of the electric switch machine.

9. The detector for an electric switch machine according to claim 1, characterized in that: The control contacts include positioning control contacts, reversing control contacts, and reset contacts.

10. The detector for an electric switch machine according to claim 1, characterized in that: The dimensions of the casing are 120×165×68mm.

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