A test system for emergency stop switch

Abstract

The present invention provides a test system for an emergency stop switch, including an actuator and a control unit connected by signals thereto, the control unit including a box and a switch installed therein, a detection board, a counting relay, a motor controller and a driver, the detection board, the counting relay and the driver are all connected to an external power supply through a switch, the driver is respectively connected to the motor controller and the actuator by signals, and the motor controller is respectively electrically connected to a start button and a pause button, and the detection board is respectively connected to the counting relay and the emergency stop switch by signals. The test system for an emergency stop switch described in the present invention has a simple working structure, is easy to operate, is easy to manufacture and has a low cost, simulates the opening and closing of the emergency stop switch in a mechanical form, and transmits a judgment signal in the form of an electrical signal, which fully meets the use of the emergency stop switch, has reasonable reliability data, and has high single-machine detection efficiency, and is easy to copy the entire machine.

Description

Technical Field

[0001] The invention belongs to the field of emergency stop switch testing, and in particular relates to a testing system for an emergency stop switch. Background Art

[0002] The emergency stop equipment in the coal mine belongs to the production equipment with high safety requirements. The emergency stop button is a necessary safety protection device. Its importance is self-evident. If there is a fault or abnormality in the electrical equipment in the coal mine, it is necessary to press the emergency stop device for emergency stop to protect the safety of the workers and machinery and equipment in the coal mine. Cutting off the power supply of the equipment as soon as the fault or abnormality is found is one of the effective ways to avoid it. The emergency stop switch must undergo strict reliability testing and functional analysis on its own reliability and service life before leaving the factory. Summary of the invention

[0003] In view of this, the present invention aims to provide a test system for an emergency stop switch to solve the problem that the existing emergency stop switch test equipment is expensive and complicated to operate.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A test system for an emergency stop switch comprises an actuator and a control unit connected with its signals. The control unit comprises a box and a switch installed inside the box, a detection board, a counting relay, a motor controller and a driver. The detection board, the counting relay and the driver are all connected to an external power supply through a switch. The driver is respectively connected to the motor controller and the actuator by signals, and the motor controller is respectively electrically connected to a start button and a pause button. The detection board is respectively connected to the counting relay and the emergency stop switch by signals.

[0006] Furthermore, there are multiple counting relays, and the signals of the multiple counting relays are all connected to a reset button.

[0007] Furthermore, the actuator includes a base and a transmission assembly installed on its upper end, one end of the transmission assembly is fixedly connected to the transmission motor, a slide is fixedly installed on the upper side of the transmission assembly, one end of the slide is fixedly connected to the emergency stop switch, the other end of the emergency stop switch is fixedly connected to the upper end of the base through a support plate, the transmission motor is connected to the motor controller through a driver signal, and the emergency stop switch signal is connected to the detection board.

[0008] Furthermore, the transmission assembly includes a first gear, a toothed belt, a second gear, a bracket and a limit assembly. The first gear and the second gear are arranged parallel to each other. The periphery of the first gear and the periphery of the second gear are respectively fixedly connected to the upper end of the base through a bracket. One end of the first gear is fixedly connected to the transmission shaft of the transmission motor through a coupling. The periphery of the first gear forms a synchronous structure with the periphery of the second gear through the toothed belt. The two ends of the limit assembly are respectively fixedly connected to the upper end of a bracket, the lower end of the slide is fixedly connected to the periphery of the belt, and the periphery of the limit assembly is sleeved to the middle of the slide.

[0009] Furthermore, the limiting assembly includes a first fixed block, a support rod and a second fixed block. The first fixed block and the second fixed block are respectively fixedly installed on the upper end of a bracket. The support rod is installed between the first fixed block and the second fixed block. The outer periphery of the support rod is sleeved on the slide.

[0010] Furthermore, the slide table includes a slider and a joint plate, a limit hole is provided in the middle of the slider, the periphery of the support rod is located in the limit hole, the lower end of the slider is fixedly connected to the periphery of the toothed belt, and the upper end of the slider is fixedly connected to one end of the emergency stop switch through the joint plate.

[0011] Furthermore, the slide also includes a claw, and one end of the joint plate is clamped to one end of the emergency stop switch through the claw.

[0012] Compared with the prior art, the test system for emergency stop switch described in the present invention has the following advantages:

[0013] (1) The test system for an emergency stop switch described in the present invention is used to detect the reliability of the emergency stop button actuation mechanism and the micro switch linked to the emergency stop button. After the emergency stop button is tested for a certain number of times, the emergency stop button can be manually checked for sticking or loosening. While the emergency stop button is being tested, the contact on / off conditions of multiple micro switches linked to the emergency stop button can be electronically detected. The device has a simple working structure, is easy to operate, is easy to manufacture and has a low cost. It simulates the opening and closing of the emergency stop switch in a mechanical form and transmits the judgment signal in the form of an electrical signal. It fully meets the usage of the emergency stop switch, has reasonable reliability data, has high single-machine detection efficiency, and is easy to replicate the entire machine.

[0014] (2) In the test system for an emergency stop switch described in the present invention, each microswitch in the emergency stop switch is configured with a counting relay, and the number of passages of each microswitch is recorded by different counting relays, so that the test data can be easily counted and duplication of work can be avoided.

[0015] (3) In the test system for an emergency stop switch described in the present invention, the support rod limits the movement path of the slide on the one hand, and supports the slide on the other hand to prevent the slide from moving on the soft toothed belt, resulting in an inconsistent path and affecting the test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A structural schematic diagram of a test system for an emergency stop switch according to an embodiment of the present invention;

[0018] Figure 2 A front view of a test system for an emergency stop switch according to an embodiment of the present invention;

[0019] Figure 3 It is a structural schematic diagram of a transmission assembly according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the slide, claw and spring assembly according to an embodiment of the present invention;

[0021] Figure 5 A control schematic diagram of a test system for an emergency stop switch according to an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1-base; 2-support plate; 3-transmission motor; 4-transmission assembly; 41-first gear; 42-toothed belt; 43-bracket; 44-first fixed block; 45-support rod; 46-second fixed block; 5-slide; 51-slider; 52-joint plate; 6-claw; 7-control unit; 8-tensioning assembly; 9-switch; 10-detection board; 11-counting relay; 12-motor controller; 13-driver DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] like Figure 1-5As shown, a test system for an emergency stop switch includes an actuator and a control unit connected with its signals, the control unit 7 includes a box body and a switch 9 installed inside it, a detection board 10, a counting relay 11, a motor controller 12 and a driver 13, the actuator includes a base 1 and a support plate 2 and a transmission component 4 respectively installed on its upper end, the transmission component 4 is located on a first side of the support plate 2, one end of the transmission component 4 is fixedly connected to the transmission motor 3, a slide 5 is fixedly installed on the upper side of the transmission component 4, two claws 6 symmetrically arranged with each other are installed on the slide 5, and the two claws 6 are used to clamp one end of the emergency stop switch, a tensioning component 8 is arranged between the two claws 6, a clearance hole is provided on the support plate 2, the periphery of the emergency stop switch is located in the clearance hole, one end of the emergency stop switch is fixedly connected to the second side of the support plate 2, the detection board 10, the counting relay 11 and the driver 13 are all connected to an external power supply through the switch 9, and the driver 13 The model is DM524, the driver 13 is respectively connected to the motor controller 12 and the transmission motor 3 by signal, and the motor controller 12 is respectively electrically connected to the start button and the pause button. The model of the motor controller 12 is DKC-Y110, and the detection board 10 is respectively connected to the counting relay 11 and the emergency stop switch by signal. The main function of the system is to detect the reliability of the emergency stop button action mechanism and the micro switch linked to the emergency stop button. After the emergency stop button is tested for a certain number of times, the emergency stop button can be manually detected for sticking or loosening. While the emergency stop button action is tested, the contact on and off conditions of multiple micro switches linked to it can be electronically detected. The device has a simple working structure, simple operation, easy to manufacture and low cost. It simulates the opening and closing of the emergency stop switch in a mechanical form and transmits the judgment signal in the form of an electrical signal, which fully meets the use of the emergency stop switch, has reasonable reliability data, high single-machine detection efficiency, and is easy to copy the whole machine.

[0029] Switch 9 is a DC24V switch 9 power supply, the input voltage is AC220V, the power is 100W, and it has overload protection and overvoltage protection.

[0030] The emergency stop switch contains two micro switches, each of which is equipped with a counting relay 11. The number of passages of each micro switch is recorded by different counting relays. The test data is easy to count and duplicate work is avoided. The model of the counting relay 11 is DH48J. The detection board 10 includes a CLTE-AT substrate and a single-chip microcomputer set thereon. The model of the single-chip microcomputer is PIC16F690-E / SS. The state detection of the micro switch is completed by the detection board 10. The model of the micro switch is V-15-1C25, which is a 3-pin micro switch. The micro switch contains 1 group of normally open contacts, 1 group of normally closed contacts, and 1 common point. The 3 pins connected to the P4 port of the CLTE-AT substrate are connected to the 3 pins connected to the P4 port of the CLTE-AT substrate. The 3 detection lines are connected to the 1# microswitch, the 1# line is connected to the NC pin, the 2# line is connected to the NO pin, and the 3# line is connected to the COM pin; the 3 detection lines led out from the P7 port of the CLTE-AT type substrate are connected to the 2# microswitch, the 1# line is connected to the NC pin, the 2# line is connected to the NO pin, and the 3# line is connected to the COM pin; as mentioned above, the two groups of signals are connected to the microcontroller, and the microcontroller determines whether the two groups of contacts are working normally by detecting the electrical level status on the two groups of contacts. The microcontroller controls the corresponding indicator light on and off according to the detected electrical level status. Within an action cycle, when the two groups of contacts are in normal status, a pulse for counting is sent to the corresponding counter relay module through the optocoupler relay.

[0031] The transmission assembly 4 includes a first gear 41, a toothed belt 42, a second gear, a bracket 43 and a limit assembly. The first gear 41 and the second gear are arranged parallel to each other. The periphery of the first gear 41 and the periphery of the second gear are respectively fixedly connected to the upper end of the base 1 through a bracket 43. One end of the first gear 41 is fixedly connected to the transmission shaft of the transmission motor 3 through a coupling. The model of the transmission motor 3 is 57CM18. The periphery of the first gear 41 forms a synchronous structure with the periphery of the second gear through the toothed belt 42. The two ends of the limit assembly are respectively fixedly connected to the upper end of a bracket 43. The lower end of the slide 5 is fixedly connected to the periphery of the belt. The periphery of the limit assembly is sleeved to the middle of the slide 5. DKC-Y110 is Chinese The programmable motor controller 12 can be programmed through the panel buttons. The input port No. 1 is connected to the start button, the input port No. 2 is connected to the pause button, and the input port No. 3 is connected to the reset button. In the DKC-Y110 system parameters, these three input ports are defined as interrupt inputs, and the corresponding input functions are defined as start, pause, and stop in sequence. The motor controller 12 sends relevant instructions to the transmission motor 3 through the driver 13. The transmission shaft of the transmission motor 3 drives the first gear 41 to move. The periphery of the first gear 41 drives the second gear to move through the toothed belt 42, thereby driving the slide 5 on the toothed belt 42 to move. The transmission of the transmission motor 3 simulates the opening and closing of the emergency stop switch to test the reliability of the emergency stop switch.

[0032] The limiting assembly includes a first fixed block 44, a support rod 45 and a second fixed block 46. The first fixed block 44 and the second fixed block 46 are respectively fixedly installed on the upper end of a bracket 43. The support rod 45 is installed between the first fixed block 44 and the second fixed block 46. The support rod 45 is sleeved on the outer periphery of the slide 5. The support rod 45 limits the movement path of the slide 5 on the one hand, and supports the slide 5 on the other hand to prevent the slide 5 from moving on the soft toothed belt 42, resulting in an inconsistent path and affecting the test effect.

[0033] The bracket 43 is an inverted U-shaped structure, and the first gear 41 and the second gear are respectively located inside a bracket 43 to prevent them from being entangled in debris such as wires and causing safety hazards. The slide 5 includes a slider 51 and a joint plate 52. A limiting hole is provided in the middle of the slider 51, and the outer periphery of the support rod 45 is located in the limiting hole. The lower end of the slider 51 is fixedly connected to the outer periphery of the toothed belt 42, and the upper end of the slider 51 is installed with a clamping claw 6 through a joint plate 52. The cross-section of the joint plate 52 is a Z-shaped structure. The tensioning assembly 8 is a spring, and the first end of the clamping claw 6 is provided with a clamping groove for clamping the outer periphery of the emergency stop switch. A handle is provided at the second end of the clamping claw 6, and one end of the spring is fixedly connected to one side of the first end. The spring is used as an elastic device for opening and closing the two clamping claws 6, which is convenient for staff to operate and meets the emergency stop switch testing of different specifications and models.

[0034] Working process of a test system for emergency stop switch:

[0035] The key stroke of the emergency stop switch to be tested is 10±1mm. Because the synchronous belt 42 has a certain amount of stretching, the reciprocating stroke of the slide 5 fixed on the synchronous belt 42 is set to 12mm. The step angle of the transmission motor 3 of 57CM18 is 1.8°, that is, the rotor rotates 1 circle for 200 pulses. The diameter of the first gear 41 is 40mm and the circumference is 125.7mm. The linear displacement of the synchronous belt 42 by 12mm requires the first gear 41 to rotate 12 / 125.7=0.095 circles, that is, the rotor of the transmission motor 3 rotates 0.095*360°3=34.2°, which requires 0.095*200=19 pulses. After 135 times subdivision by the driver, it can be seen that when the motor controller 12 sends 19*5=95 pulses, the corresponding slide 5 moves 12mm.

[0036] The staff fixedly connected one end of the emergency stop switch to the second side of the support plate 2, and clamped the other end of the emergency stop switch through two claws 6. The staff connected the three detection lines led out of the P4 port of the CLTE-AT substrate to the 1# microswitch, and the 1# line was connected to the NC pin, the 2# line was connected to the NO pin, and the 3# line was connected to the COM pin; the three detection lines led out of the P7 port of the CLTE-AT substrate were connected to the 2# microswitch, and the 1# line was connected to the NC pin, the 2# line was connected to the NO pin, and the 3# line was connected to the COM pin. The two sets of signals mentioned above are connected to the microcontroller.

[0037] Turn on the power of switch 9, and the transmission motor 3 runs according to the parameters set by the above-mentioned controller. The transmission shaft of the transmission motor 3 drives the first gear 41 to move, and the periphery of the first gear 41 drives the second gear to move through the toothed belt 42, thereby driving the slide 5 on the toothed belt 42 to move. The transmission of the transmission motor 3 simulates the opening and closing of the emergency stop switch. The single-chip microcomputer determines whether the two groups of contacts are working normally by detecting the electrical level status on the two groups of contacts. The single-chip microcomputer controls the corresponding indicator light and off according to the detected electrical level status. Within an action cycle, when the states of the two groups of contacts are normal, a pulse for counting is sent to the corresponding counter relay module through the optical coupler relay.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test system for an emergency stop switch, characterized in that: The invention relates to a control unit (7) comprising an actuator and a signal connection thereof, wherein the control unit (7) comprises a housing and a switch (9) installed therein, a detection board (10), a counting relay (11), a motor controller (12) and a driver (13), wherein the detection board (10), the counting relay (11) and the driver (13) are all connected to an external power supply via the switch (9), the motor controller (12) is signal-connected to the actuator via the driver (13), and the motor controller (12) is respectively electrically connected to a start button and a pause button, and the detection board (10) is signal-connected to the counting relay (11) and the emergency stop switch; The actuator comprises a base (1) and a transmission assembly (4) mounted on its upper end, one end of the transmission assembly (4) being fixedly connected to a transmission motor (3), a slide table (5) being fixedly mounted on the upper side of the transmission assembly (4), one end of the slide table (5) being fixedly connected to an emergency stop switch, the other end of the emergency stop switch being fixedly connected to the upper end of the base (1) via a support plate (2), the transmission motor (3) being connected to a motor controller (12) via a driver (13) signal, and the emergency stop switch signal being connected to a detection board (10); The transmission assembly (4) comprises a first gear (41), a toothed belt (42), a second gear, a bracket (43) and a limit assembly. The first gear (41) and the second gear are arranged parallel to each other. The periphery of the first gear (41) and the periphery of the second gear are respectively fixedly connected to the upper end of the base (1) through a bracket (43). One end of the first gear (41) is fixedly connected to the transmission shaft of the transmission motor (3) through a coupling. The periphery of the first gear (41) forms a synchronous structure with the periphery of the second gear through the toothed belt (42). The two ends of the limit assembly are respectively fixedly connected to the upper end of a bracket (43). The lower end of the slide (5) is fixedly connected to the periphery of the belt. The periphery of the limit assembly is sleeved to the middle of the slide (5). The number of the counting relays (11) is plural, and the signals of the plural counting relays (11) are all connected to a reset button.

2. A test system for an emergency stop switch according to claim 1, characterized in that: The limiting assembly comprises a first fixed block (44), a support rod (45) and a second fixed block (46); the first fixed block (44) and the second fixed block (46) are respectively fixedly mounted on the upper end of a bracket (43); the support rod (45) is mounted between the first fixed block (44) and the second fixed block (46); and the outer periphery of the support rod (45) is sleeved on the sliding table (5).

3. A test system for an emergency stop switch according to claim 2, characterized in that: The slide table (5) comprises a slider (51) and a joint plate (52). A limiting hole is provided in the middle of the slider (51). The periphery of the support rod (45) is located in the limiting hole. The lower end of the slider (51) is fixedly connected to the periphery of the toothed belt (42). The upper end of the slider (51) is fixedly connected to one end of the emergency stop switch via the joint plate (52).

4. A test system for an emergency stop switch according to claim 3, characterized in that: The slide (5) further comprises a clamping claw (6), and one end of the movable plate (52) is clamped to one end of the emergency stop switch (9) through the clamping claw (6).

Images