Bus technology-based application method in belt conveyor protection

Abstract

The invention relates to the technical field of bulk cargo terminal enterprise belt conveyor equipment control, in particular to a bus technology-based belt conveyor protection application method, which comprises the following steps of: setting an address of protection equipment on a belt conveyor; the first switching value control box, the second switching value control box and the analog quantity control box are all connected with the communication master station control box through a communication bus and a control bus, and the communication master station control box is connected with the upper computer and controls the protection equipment by using a communication address and writing a PLC program; connecting each protection device to a preset communication PLC, and realizing communication connection between each protection device and the PLC device through a communication gateway; the position for triggering the protection action is displayed in real time through the monitoring picture of the upper computer; protection equipment can be accurately positioned, belt protection fault points can be rapidly judged, the fault influence time is shortened, and the troubleshooting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of belt conveyor equipment control in bulk cargo terminal enterprises, and in particular to an application method for belt conveyor protection based on bus technology. Background Art

[0002] In current bulk cargo terminal enterprises, belt conveyors are important transportation equipment for transshipping goods. The probability of risks in actual operation is high, so various types of protection equipment need to be installed. There are many types and quantities of protection equipment. When a belt conveyor fails, the corresponding protection device performs a protection action to protect the belt conveyor, and relevant staff can repair the failure.

[0003] In the related art, various protective devices of the belt conveyor are connected in series, such as Figure 1 As shown, protection devices of the same type are connected in series and share a feedback signal. This design architecture saves a large number of PLC points and greatly reduces the task of cable laying.

[0004] However, in actual applications, the setting method of the belt conveyor protection equipment in the above-mentioned related technologies has the following defects: First, since the same type of protection equipment is connected to the module point in series, when a certain device takes a protection action, it is impossible to accurately locate which protection action has taken place. Second, if a certain protection equipment on site has an abnormal phenomenon such as grounding or short circuit, it will directly affect the entire control circuit. If any protection has a problem, all protection equipment needs to be checked, making fault troubleshooting extremely difficult. The above protection action problems have a great impact on the transportation and transfer production process. Summary of the invention

[0005] In order to solve the problem that the existing setting method of belt conveyor protection equipment cannot accurately locate the protection equipment when a fault occurs, making fault troubleshooting difficult, the present invention provides an application method for belt conveyor protection based on bus technology, which can accurately locate the belt conveyor protection equipment, quickly determine the belt protection fault point, shorten the fault impact time, and improve the fault troubleshooting efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] An application method for belt conveyor protection based on bus technology, wherein the belt conveyor is provided with a protection device, the protection device comprising a pull-rope protection switch, a deviation protection switch and a temperature sensor, the pull-rope protection switch is connected to a first switch quantity control box for collecting switch status, the deviation protection switch is connected to a second switch quantity control box for collecting switch status, and the temperature sensor is connected to an analog quantity control box;

[0008] Setting a corresponding address for the protection device on the belt conveyor, wherein the address is used to assign an independent communication address and position to the protection device;

[0009] The first switch quantity control box, the second switch quantity control box and the analog quantity control box are all connected to the communication master station control box through the communication bus and the control bus. The communication master station control box is connected to the host computer, and the PLC devices in the switch quantity control box and the analog quantity control box are used to write programs to control the protection equipment;

[0010] Through direct connection, each protection device is connected to the preset communication PLC, and the communication connection between each protection device and the PLC devices in the switch quantity control box and analog quantity control box is realized through the communication gateway;

[0011] The host computer monitoring screen is set according to the installation position of the protection device and the coded and compiled PLC program, and the position of triggering the protection action is displayed in real time through the host computer monitoring screen.

[0012] Furthermore, the real-time display of the location of triggering the protection action through the host computer monitoring screen specifically includes:

[0013] According to the way the protection device and protection signal are connected to PLC, the corresponding position of each protection device is displayed in the flow chart of the host computer monitoring screen;

[0014] According to the protection action monitoring result received by the PLC device in real time, the specific location information of the target protection device is displayed in the upper computer monitoring screen, and the target protection device currently performing the protection action is marked in red.

[0015] Furthermore, each protection device communicates with the PLC device via the Modbus communication protocol.

[0016] Furthermore, the installation position and code of the protection device are specifically used to determine the location address of the protection device through the installation position and information of the protection device.

[0017] Furthermore, the first switch quantity control box, the second switch quantity control box and the analog quantity control box are all connected to the communication master station control box via the communication bus and the control bus. Specifically:

[0018] The first switch quantity control box, the second switch quantity control box and the analog quantity control box are connected to the communication master station control box via the communication bus and the control bus by means of a jumper connection.

[0019] Furthermore, each protection device is connected to a preset communication PLC through a direct connection, and the communication connection between each protection device and the PLC device is achieved through a communication gateway. Specifically, each protection device is address-encoded, and all protection devices are connected to the communication PLC in parallel; the communication connection between the communication bus and the PLC device is achieved through Ethernet.

[0020] Furthermore, the PLC program includes a protection action control program and a data acquisition program for each of the protection devices.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) This application adopts the control concept of bus technology, performs address coding on the original protection device of the belt conveyor, and directly uses the modbus protocol to communicate with the PLC. It can achieve accurate positioning of the protection device for protection actions without changing the chain relationship and greatly reducing the positioning transformation line, which is conducive to the staff to quickly find the location of the triggering protection.

[0023] (2) In the present invention, bus technology is used to realize the communication of belt protection data, thereby realizing the precise positioning of belt protection, and can quickly display the fault point, thus shortening the time for on-site fault handling and improving the safety and reliability of the system; it can shorten the fault impact time, provide sufficient time for equipment maintenance, effectively improve the equipment availability rate, and help improve the safety, reliability and work efficiency of the belt conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the connection mode of each protective device in the belt conveyor in the prior art;

[0025] Figure 2 It is a schematic diagram of the connection structure of each protective device in the belt conveyor of the present invention;

[0026] Figure 3 A flow chart of the application method of the present invention;

[0027] Figure 4 A schematic diagram of the application method proposed for the implementation case of this application;

[0028] Figure 5 It is a schematic diagram of the monitoring screen of the host computer of the present invention; DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See also Figure 1, an application method based on bus technology in belt conveyor protection, the belt conveyor is provided with a protection device, the protection device comprises a pull-rope protection switch, a deviation protection switch and a temperature sensor, the pull-rope protection switch is connected to a first switch quantity control box for collecting switch status, the deviation protection switch is connected to a second switch quantity control box for collecting switch status, and the temperature sensor is connected to an analog quantity control box;

[0031] Setting a corresponding address for the protection device on the belt conveyor, wherein the address is used to assign an independent communication address and position to the protection device;

[0032] The first switch quantity control box, the second switch quantity control box and the analog quantity control box are all connected to the communication master station control box through the communication bus and the control bus. The communication master station control box is connected to the host computer, and the PLC devices in the switch quantity control box and the analog quantity control box are used to write programs to control the protection equipment;

[0033] Through direct connection, each protection device is connected to the preset communication PLC, and the communication connection between each protection device and the PLC devices in the switch quantity control box and analog quantity control box is realized through the communication gateway;

[0034] The host computer monitoring screen is set according to the installation position of the protection device and the coded and compiled PLC program, and the position of triggering the protection action is displayed in real time through the host computer monitoring screen.

[0035] In an implementation case of the present application, the above-mentioned temperature sensor is used to measure the temperature of the drum.

[0036] The application method of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0037] like Figure 3 As shown, a method for applying bus technology to belt conveyor protection includes the following steps:

[0038] Step 1: Position code each protective device of the belt conveyor.

[0039] Step 2: Connect each protection device to the preset PLC through a direct connection.

[0040] Each of the protection devices is address-coded, and all the protection devices are connected to the communication PLC in parallel; the communication bus and the PLC device are connected in communication via Ethernet.

[0041] Step 3, based on the communication bus and independent communication address, use the Modbus communication protocol to enable each protection device to communicate with the PLC device, and use the communication address and location to write a PLC program to control the protection device.

[0042] The location address of the protection device is determined by the installation location and information of the existing protection device.

[0043] The data interaction between the communication bus and the Ethernet module of the PLC device is realized through the Modbus communication protocol. Specifically, based on the Modbus communication protocol, a communication connection is established with the above-mentioned gateway through the Ethernet module inside the PLC device, so that the communication between the protection device and the PLC device can be completed. In this embodiment, the cable of the signal bus adopts a shielded cable, and the communication adopts an optical cable, which has a strong anti-interference ability, can avoid mutual interference between different protection devices, and perform parallel communication.

[0044] The present invention also compiles a PLC master station program according to the belt conveyor protection work requirements, so as to control each protection device and realize data collection through the master station PLC program. The compiled PLC program includes: a protection action control program and a data collection program for each protection device.

[0045] Specifically, in this implementation case, the PLC device can control the operation of each protection device, and monitor each protection device by receiving data sent by each protection device and analyzing data parameter values, determine the status of each protection device, and judge whether it has performed a protection action.

[0046] Step 4: Set the host computer monitoring screen according to the protection device location and PLC program, and display the location that triggers the protection action in real time through the host computer monitoring screen.

[0047] The host computer is connected to the master PLC and slave PLC devices, obtains the data sent by the PLC devices, and improves the host computer screen. The protection device that performs the protection action is displayed in the host computer operation screen, and the protection fault is accurately displayed according to the location of the protection device.

[0048] According to the protection action monitoring results received in real time by the PLC device (i.e. the way in which the protection device and protection signals such as switch quantity or analog quantity are connected to the PLC), the specific location information of the target protection device is displayed in the upper computer monitoring screen, and the target protection device currently performing the protection action is marked in red.

[0049] After the protection device currently performing the protection action is marked in red, the specific location information of the target protection device is displayed on the upper computer monitoring screen, the interlocking belt conveyor is stopped to protect the equipment, and a protection switch shielding function is added. When the monitoring personnel determines that the fault does not affect the continued use of the equipment, the shielding function can be used on the upper computer.

[0050] In this embodiment, the upper computer monitoring screen is as follows Figure 5As shown, in the monitoring interface, the number and type of protective devices actually set for the belt conveyor and the location information of each protective device are displayed. For example, when the location code of a certain pull rope protective device is 14A, the location of the pull rope protective device is determined to be at the tail of the belt conveyor according to the predetermined location device information.

[0051] Furthermore, in order to make it easier for staff to troubleshoot, the implementation case of this application can also provide staff with specific information about the target protection device where the protection action occurs, including displaying the specific location coordinates of the target protection device on site, its orientation and installation position relative to the belt conveyor on the monitoring screen, etc., so that staff can achieve further precise positioning and maintenance staff can troubleshoot in a timely manner.

[0052] In one embodiment of the present invention, the first switch quantity control box, the second switch quantity control box and the analog quantity control box are all connected to the communication master station control box via the communication bus and the control bus as follows:

[0053] The first switch quantity control box, the second switch quantity control box and the analog quantity control box are connected to the communication master station control box via a communication bus and a control bus.

[0054] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An application method based on bus technology in belt conveyor protection, characterized in that: The belt conveyor is provided with a protection device, which includes a pull-rope protection switch, a deviation protection switch and a temperature sensor. The pull-rope protection switch is connected to a first switch quantity control box for collecting switch status, the deviation protection switch is connected to a second switch quantity control box for collecting switch status, and the temperature sensor is connected to an analog quantity control box; Setting a corresponding address for the protection device on the belt conveyor, wherein the address is used to assign an independent communication address and position to the protection device; The first switch quantity control box, the second switch quantity control box and the analog quantity control box are all connected to the communication master station control box through the communication bus and the control bus. The communication master station control box is connected to the host computer, and the PLC devices in the switch quantity control box and the analog quantity control box are used to write programs to control the protection equipment; Through direct connection, each protection device is connected to the preset communication PLC, and the communication connection between each protection device and the PLC devices in the switch quantity control box and analog quantity control box is realized through the communication gateway; The host computer monitoring screen is set according to the installation position of the protection device and the coded and compiled PLC program, and the position of triggering the protection action is displayed in real time through the host computer monitoring screen.

2. The application method of bus technology in belt conveyor protection according to claim 1 is characterized in that: The real-time display of the position of triggering the protection action through the host computer monitoring screen specifically includes: According to the way the protection device and protection signal are connected to PLC, the corresponding position of each protection device is displayed in the flow chart of the host computer monitoring screen; According to the protection action monitoring result received by the PLC device in real time, the specific location information of the target protection device is displayed in the upper computer monitoring screen, and the target protection device currently performing the protection action is marked in red.

3. The application method of bus technology in belt conveyor protection according to claim 1 is characterized in that: Each protection device communicates with the PLC device through the Modbus communication protocol.

4. The application method of bus technology in belt conveyor protection according to claim 1 is characterized in that: The installation position and code of the protection device are specifically used to determine the location address of the protection device through the installation position and information of the protection device.

5. The application method of bus technology in belt conveyor protection according to claim 1 is characterized in that: The first switch quantity control box, the second switch quantity control box and the analog quantity control box are all connected to the communication master station control box through the communication bus and the control bus. Specifically: The first switch quantity control box, the second switch quantity control box and the analog quantity control box are connected to the communication master station control box via the communication bus and the control bus by means of a jumper connection.

6. The application method of bus technology in belt conveyor protection according to claim 1 is characterized in that: The direct connection method connects each protection device to a preset communication PLC, and realizes the communication connection between each protection device and the PLC device through a communication gateway. Specifically, each protection device is address-encoded, and all protection devices are connected to the communication PLC in parallel; the communication connection between the communication bus and the PLC device is realized through Ethernet.

7. The application method of bus technology in belt conveyor protection according to claim 1 is characterized in that: The PLC program includes a protection action control program and a data acquisition program for each protection device.

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