Automatic detection equipment for elevator car roof electrical box based on PLC (Programmable Logic Controller)

Abstract

The utility model discloses an elevator car roof electrical box automatic detection device based on a PLC, relates to the technical field of elevators, aims to solve the problem that an elevator car roof electrical box needs to be detected manually, and adopts the technical scheme that the elevator car roof electrical box automatic detection device comprises a tool jig and a lower computer. The tool jig comprises a jig platform, a push rod assembly arranged at one end of the upper side of the jig platform, a car roof electrical box arranged in the middle of the upper side of the jig platform in a sliding fit mode, and a plug-in cable junction box arranged at the other end of the upper side of the jig platform. Through the arrangement of the push rod assembly, the push rod assembly can control the position of the car roof electrical box so that the car roof electrical box can be connected with the metal probe on one side of the plug-in cable junction box, the metal probe transmits signals in the car roof electrical box to the plug-in cable junction box, and the relay is used for signal expansion. The signal is detected through the on-off of the relay in cooperation with the logic control of the programmable controller, and the detection result is more accurate.

Description

Technical Field

[0001] The utility model belongs to the field of elevators, and in particular relates to a PLC-based automatic detection device for an electrical box on a top of an elevator car. Background Art

[0002] In the operation and control of the elevator, the car-top electrical box serves as a signal transfer device and a control device in the maintenance state. It is mainly responsible for the electrical signal transmission during the operation of the elevator and the elevator control during maintenance. Its importance in elevator control is self-evident. The quality of the car-top electrical box will also directly affect the safety and stability of the elevator. For example, incorrect wiring of the electrical principle, short circuit / false connection will directly lead to the elevator failure and inability to operate, and may even cause safety accidents, bringing great safety hazards and troubles to the operation, commissioning and maintenance of the elevator. Therefore, it is necessary to design a detection device that can be quickly switched to detect and ensure that the electrical wiring of the car-top electrical box is correct and verify whether the electrical components are functioning normally.

[0003] The internal circuit principles of the car-top electrical box products on the existing market are relatively complex, and there are many signal connections between electrical components and connectors. Most of the inspections of these products are carried out by manual inspection or simple testing tools. Especially in the case of manual inspection, inspectors are required to use a multimeter to perform point-to-point inspections on the wiring of the car-top electrical box according to the circuit schematic diagram, and are unable to verify the functions of the electrical components. There is a lack of more convenient testing methods, no fast-switching tooling, and no human-computer interaction fast-operation interface, resulting in long testing time and low efficiency.

[0004] In summary, the utility model therefore provides an elevator car top electrical box automatic detection device based on PLC to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an automatic detection device for the elevator car top electrical box based on PLC, which has the advantage that the car top electrical box can be electrically connected to the lower computer through plug-in cables and tooling fixtures. The upper computer software includes a login interface, operation buttons, status display of monitoring data of each circuit point, and communication status settings. The lower computer includes a manual start / stop button, a power button and a test indicator light, a quick-plug plug-in cable, and a quick-switching fixture. The upper computer can be used to automatically detect the electrical wiring of the car top electrical box, and the detection results are displayed on the upper computer software, thereby detecting wiring assembly errors of the car top electrical box and improving test efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An automatic detection device for an elevator car top electrical box based on PLC, comprising: a tooling fixture and a lower computer, wherein the tooling fixture comprises a fixture platform, a push rod assembly mounted on one end of the upper side of the fixture platform, a car top electrical box slidably matched to the middle part of the upper side of the fixture platform, a plug-in cable junction box mounted on the other end of the upper side of the fixture platform, and a metal probe fixed to one side of the plug-in cable junction box close to the car top electrical box, wherein one end of the push rod assembly is connected to the car top electrical box;

[0008] The lower computer includes a lower computer case, a programmable controller installed in the middle of the lower computer case, a plurality of relays installed in the lower computer case, three status display lights installed on the top of the case, two manual operation buttons installed on the top of the case, a power cable inlet connector installed on one side of the case, and a plurality of plug-in cable connectors, wherein a communication cable is plugged into the plug-in cable connector, and one end of the communication cable is connected to the upper computer. A plug-in cable is connected to one end of the plug-in cable junction box, and one end of the plug-in cable is connected to the plug-in cable connector.

[0009] By adopting the above technical scheme, the push rod assembly is set, so that the push rod assembly can control the position of the car top electrical box, so that the car top electrical box is connected to the metal probe on one side of the plug-in cable junction box, so that the metal probe transmits the signal in the car top electrical box to the plug-in cable junction box, and then the plug-in cable junction box can transmit the signal to the plug-in cable plug connector via the plug-in cable, so that the lower computer receives the signal, uses multiple relays to expand the signal, and detects the signal through the on and off of multiple relays in conjunction with the logic control of the programmable controller, so that the detection speed is faster and the detection result is more accurate. Finally, the communication cable is used to transmit the detection result to the upper computer for point status display, so that it can quickly detect whether the wiring assembly of the car top electrical box is wrong, which greatly improves the test efficiency, so that the automated detection equipment can achieve human-computer interaction, fast switching, safety and reliability, and can display whether the wiring line of the elevator car top electrical box is correct and whether the electrical components function normally.

[0010] The utility model is further configured as follows: the host computer includes a processor, a display, and a mouse and keyboard.

[0011] By adopting the above technical solution, the detection structure of the lower computer can be displayed on the display through the processor, making the detection results more intuitive and can be viewed and operated through the mouse and keyboard while waiting for the next detection instruction. This can reduce manual operations on the tooling and the lower computer, reduce the burden on the detection personnel, better ensure safety, and make the detection structure more accurate.

[0012] The utility model is further configured as follows: the push rod assembly includes a fixed seat fixed to the upper side of the fixture platform, a handle rotatably engaged with the upper end of the fixed seat, an L-shaped plate rotatably engaged with one end of the handle, and a push rod rotatably engaged with one end of the L-shaped plate, and the push rod is slidably engaged with the fixed seat.

[0013] By adopting the above technical solution, the L-shaped plate can be controlled by the set handle to push the push rod and the car top electrical box forward, so that the metal probe transmits the signal in the car top electrical box to the plug-in cable junction box, so that the plug-in cable junction box can better transmit the detected signal.

[0014] The utility model is further configured as follows: the plurality of relays are located around the programmable controller. The programmable controller is connected to the plurality of relays.

[0015] By adopting the above technical solution, through the setting of a programmable controller and multiple relays, the signal in the relay is expanded through the programmable controller, and the signal is detected by the on and off of the relay in conjunction with the logical control of the programmable controller, so that the detection efficiency is higher and the result is more accurate.

[0016] The utility model is further configured as follows: the car top electrical box is a hollow structure, and a rectangular groove is opened on one side close to the car top electrical box, and the rectangular groove corresponds to the metal probe.

[0017] By adopting the above technical solution, the metal probe can be connected to the detection equipment in the car top electrical box through the rectangular groove, so that the metal probe can better transmit the signal in the car top electrical box.

[0018] In summary, the beneficial technical effects of the utility model are:

[0019] By setting the push rod assembly, the push rod assembly can control the position of the car top electrical box, so that the car top electrical box is connected to the metal probe on one side of the plug-in cable junction box, so that the metal probe transmits the signal in the car top electrical box to the plug-in cable junction box, and then the plug-in cable junction box can transmit the signal to the plug-in cable plug connector via the plug-in cable, so that the lower computer receives the signal, uses multiple relays to expand the signal, and detects the signal through the on and off of multiple relays in conjunction with the logic control of the programmable controller, so that the detection speed is faster and the detection result is more accurate. Finally, the communication cable is used to transmit the detection result to the upper computer for point status display, so that it can quickly detect whether the wiring assembly of the car top electrical box is wrong, which greatly improves the test efficiency, so that the automatic detection equipment can achieve human-computer interaction, fast switching, safety and reliability, and can display whether the wiring line of the elevator car top electrical box is correct and whether the electrical components function normally.

[0020] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 This is a schematic diagram of a three-dimensional structure of a tooling fixture assembly according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the lower machine assembly of an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the upper computer assembly of an embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the push rod assembly assembly according to one embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the overall process of an embodiment of the utility model;

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Tooling fixture; 101. Fixture platform; 102. Push rod assembly; 1021. Fixed seat; 1022. Handle; 1023. L-shaped plate; 1024. Push rod; 103. Car top electrical box; 104. Metal probe; 105. Plug-in cable junction box; 106. Rectangular groove; 2. Lower computer; 201. Lower computer case; 202. Programmable controller; 203. Relay; 204. Status display light; 205. Manual operation button; 206. Power cable inlet connector; 207. Plug-in cable connector; 3. Upper computer; 301. Processor; 302. Display; 303. Mouse and keyboard; 4. Plug-in cable. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figure 1-5, which is an automatic detection device for an elevator car top electrical box based on PLC disclosed in the utility model, comprising: a tool fixture 1 and a lower computer 2, wherein the tool fixture 1 comprises a fixture platform 101, a push rod assembly 102 installed at one end of the upper side of the fixture platform 101, a car top electrical box 103 slidably matched in the middle of the upper side of the fixture platform 101, a plug-in cable junction box 105 installed at the other end of the upper side of the fixture platform 101, and a metal probe 104 fixed to the plug-in cable junction box 105 near the car top electrical box 103, and one end of the push rod assembly 102 is connected to the car top electrical box 103;

[0031] The lower computer 2 includes a lower computer case 201, a programmable controller 202 installed in the middle of the lower computer case 201, a plurality of relays 203 installed in the lower computer case 201, three status display lights 204 installed on the top of the case 201, two manual operation buttons 205 installed on the top of the case 201, a power cable inlet connector 206 installed on one side of the case 201, and a plurality of plug-in cable connectors 207, in which a communication cable is plugged, and one end of the communication cable is connected to the upper computer 3. One end of the plug-in cable junction box 105 is connected to a plug-in cable 4, and one end of the plug-in cable 4 is connected to the plug-in cable connector 207.

[0032] The application of one aspect of this embodiment is as follows: when it is necessary to inspect the elevator, first start the tooling fixture 1 and the lower computer 2 and the upper computer 3, and then manually push the push rod assembly 102, the push rod assembly 102 pushes the car top electrical box 103 to slide on the upper side of the fixture platform 101, thereby driving the car top electrical box 103 to slide to the specified position and then connect with the metal probe 104, at this time the metal probe 104 will detect the car top electrical box 103, and transmit the detected signal to the plug-in cable junction box 105, the plug-in cable junction box 105 then transmits the signal to the plug-in cable connector 207 through the plug-in cable 4, and the multiple plug-in cable connectors 207 then transmit the signal to the multiple relays 203 respectively, and then the programmable controller 202 uses the relay 203 to expand the signal, and the signal is detected by the on and off of the relay 203 in conjunction with the logic control of the programmable controller 202, the detection result is displayed through the three status display lights 204 and transmitted to the upper computer 3 through the communication cable, and the upper computer 3 displays the status on the corresponding interface after logical analysis. It should be noted that all electrical devices involved in this application can be powered by batteries or external power supplies.

[0033] Reference Figure 3 The host computer 3 of this embodiment includes a processor 301, a display 302, and a mouse and keyboard 303. When the detection result of the lower computer 2 is transmitted to the host computer 3, the processor 301 analyzes the signal, displays the specific result through the display 302, and can also be operated through the mouse and keyboard 303.

[0034] Reference Figure 4 The push rod assembly 102 of this embodiment includes a fixed seat 1021 fixed to the upper side of the fixture platform 101, a handle 1022 rotatably engaged with the upper end of the fixed seat 1021, an L-shaped plate 1023 rotatably engaged with one end of the handle 1022, and a push rod 1024 rotatably engaged with one end of the L-shaped plate 1023. The push rod 1024 is slidably engaged with the fixed seat 1021. When it is necessary to connect the car top electrical box 103 and the metal probe 104, the handle 1022 is manually pushed so that one end of the handle 1022 rotates and cooperates with the upper end of the fixed seat 1021. At the same time, one end of the handle 1022 will push the L-shaped plate 1023 to rotate, so that the other end of the L-shaped plate 1023 moves forward, and then the other end of the L-shaped plate 1023 will push the push rod 1024 to slide in the middle of the fixed seat 1021, and one end of the push rod 1024 will push the car top electrical box 103 to move to the side close to the metal probe 104 and connect with the metal probe 104.

[0035] Reference Figure 2 , multiple relays 203 are located around the programmable controller 202. The programmable controller 202 of this embodiment is connected to multiple relays 203. When the plug cable 4 transmits the signal to the corresponding relay 203, the programmable controller 202 uses the relay 203 to expand the signal because there are too many I / O points of the detection signal, and performs signal detection through the on and off of the relay 203 and the logic control of the programmable controller 202.

[0036] Reference Figure 4 The car top electrical box 103 of this embodiment is a hollow structure, and a rectangular groove 106 is provided near one side of the car top electrical box 103, and the rectangular groove 106 corresponds to the metal probe 104. When the car top electrical box 103 is connected to the metal probe 104, the metal probe 104 will extend into the car top electrical box 103 through the rectangular groove 106 on one side of the car top electrical box 103, connect with the signal detection device therein, and transmit the signal to the plug-in cable junction box 105.

[0037] Specifically, the upper computer software is set in the upper computer 3, and the upper computer software consists of a detection button, a reset button, a communication setting window and a line point status display window. The three display lights are orange, green and red respectively. The two manual operation buttons 205 are a start button and a stop button. When the lower computer 2 and the upper computer 3 are powered on, the corresponding data bits, display lights and input / output signals are initialized, the program starts to execute, and then waits for the start button to be pressed, or waits for the detection button of the upper computer 3 to be pressed. When the upper computer 3 receives the detection signal, the cable connector 207 transmits the signal to the corresponding relay 203. Because there are too many I / O points of the detection signal, the programmable controller 202 uses Relay 203 carries out signal expansion, and signal detection is carried out by turning on and off relay 203 in coordination with the logic control of programmable controller 202 to detect the emergency stop line, normal / maintenance line, slow upper running line, slow lower running line, car lighting line, socket line, relay line and car top board line. During the detection, an orange indicator light is turned on, a green indicator light is turned on if the detection passes, and a red indicator light is turned on if the detection fails. The detection result of the lower computer transmits the corresponding data to the upper computer through serial port communication, and the conduction status between the electrical principle points is displayed on the upper computer software. After logical analysis by the upper computer software, the detection result is displayed on the corresponding interface and waits for the next detection instruction.

[0038] The above-mentioned embodiments may be combined with each other.

[0039] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic detection device for an elevator car top electrical box based on PLC, comprising: A jig (1) and a lower computer (2), characterized in that the jig (1) comprises a jig platform (101), a push rod assembly (102) mounted on one end of the upper side of the jig platform (101), a car top electrical box (103) slidably fitted in the middle of the upper side of the jig platform (101), a plug-in cable junction box (105) mounted on the other end of the upper side of the jig platform (101), and a metal probe (104) fixed to the plug-in cable junction box (105) on one side close to the car top electrical box (103), and one end of the push rod assembly (102) is connected to the car top electrical box (103); The lower computer (2) comprises a lower computer case (201), a programmable controller (202) mounted in the middle of the lower computer case (201), a plurality of relays (203) mounted in the lower computer case (201), three status display lights (204) mounted on the top of the case (201), two manual operation buttons (205) mounted on the top of the case (201), a power cable inlet connector (206) and a plurality of plug-in cable connectors (207) mounted on one side of the case (201), a communication cable being plugged into one of the plug-in cable connectors (207), one end of the communication cable being connected to the upper computer (3), and a plug-in cable (4) being connected between the plug-in cable junction box (105) and the plug-in cable connector (207).

2. According to the PLC-based automatic detection equipment for elevator car top electrical box according to claim 1, it is characterized in that: The host computer (3) comprises a processor (301), a display (302) and a mouse and keyboard (303).

3. The PLC-based automatic detection device for the elevator car top electrical box according to claim 1 is characterized in that: The push rod assembly (102) comprises a fixed seat (1021) fixed to the upper side of the fixture platform (101), a handle (1022) rotatably engaged with the upper end of the fixed seat (1021), an L-shaped plate (1023) rotatably engaged with one end of the handle (1022), and a push rod (1024) rotatably engaged with one end of the L-shaped plate (1023), wherein the push rod (1024) is slidably engaged with the middle part of the fixed seat (1021).

4. The PLC-based automatic detection device for the elevator car top electrical box according to claim 3 is characterized in that: The pushing rod (1024) corresponds to the car top electrical box (103).

5. The PLC-based automatic detection device for the elevator car top electrical box according to claim 1 is characterized in that: The plurality of relays (203) are located on the peripheral side of the programmable controller (202).

6. The PLC-based automatic detection device for the elevator car top electrical box according to claim 5 is characterized in that: The programmable controller (202) is connected to a plurality of relays (203).

7. The PLC-based automatic detection device for the elevator car top electrical box according to claim 1 is characterized in that: The car top electrical box (103) is a hollow structure, and a rectangular groove (106) is provided on one side close to the car top electrical box (103), and the rectangular groove (106) corresponds to the metal probe (104).

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