A method for distinguishing the alarm of the pull line and deviation switch of the coal conveyor belt

Abstract

The present invention provides a method for distinguishing the alarm of a pull line and a deviation switch of a coal conveying belt, comprising: step 1, installing a monitoring relay in the control box of a belt conveyor where the pull line of the coal conveying belt is located; step 2, determining a 220V AC power supply from the existing circuit in the control box of the belt conveyor, and connecting it to the coil circuit to which the monitoring relay is installed; step 3, checking and ensuring that the normally open contact extended by the relay KC1 in the pull line of the coal conveying belt and the deviation switch circuit is connected to the tripping circuit of the belt conveyor; step 4, connecting the normally open contact extended by the relay KC1 in the original switch circuit of the pull line of the coal conveying belt and the deviation switch to the coil circuit to which the relay is installed; step 5, judging whether the pull line of the coal conveying belt or the deviation switch is in action and the position of the fault point by observing the indicator light of the monitoring relay. The method slightly modifies the existing control circuit and installs a relay to realize the monitoring of all pull lines and deviation switch circuits. When a fault occurs, the position of the fault point can be quickly found and eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of electrical secondary of thermal power plants, in particular to the identification of the pull wire of a coal conveying belt and the alarm of a deviation switch. Background Art

[0002] The action of the pull wire and deviation switch of the coal conveyor belt will cause the conveyor belt to stop. The existing method of eliminating faults in the control circuit of the coal conveyor belt is to check whether the thermocouple of the motor contactor is actuated, whether the speed signal device is actuated, and whether the control circuit is disconnected (including the on and off of the contacts of each control handle, program instructions, pull wires, and deviation switch actions) after the conveyor belt stops to determine the fault point and then eliminate the fault. Due to the design characteristics and operating environment of the conveyor belt control circuit, this defect finding method is time-consuming and inefficient every time a fault occurs, affecting the safe and reliable operation of the coal conveying system and the economic benefits of the enterprise.

[0003] In short, the design characteristics and operating environment of the existing belt conveyor control circuit make the defect finding method time-consuming and inefficient every time a fault occurs, affecting the safe and reliable operation of the coal transportation system. Summary of the invention

[0004] In order to overcome the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a method for identifying the alarm of the coal conveyor belt pull wire and the deviation switch, which is obtained by exploring, summarizing and improving the analysis and processing methods of various faults of the coal conveyor belt pull wire, the deviation switch and the belt conveyor control circuit. This method greatly improves the equipment defect elimination efficiency and equipment utilization rate, ensures the safe and stable operation of the system, greatly reduces the equipment operation risk, and is conducive to improving the enterprise's operating efficiency.

[0005] The object of the present invention is to provide a method for distinguishing the alarm of a pull line and a deviation switch of a coal conveyor belt, comprising:

[0006] Step 1, installing a monitoring relay in the control box of the belt conveyor where the coal conveyor belt wire is located;

[0007] Step 2, determining a 220V AC power supply from the existing circuit in the control box of the belt conveyor, and connecting it to the coil circuit of the monitoring relay;

[0008] Step 3, check and ensure that the normally open contact of the relay KC1 in the coal conveyor belt pull line and deviation switch circuit is connected to the belt conveyor trip circuit;

[0009] Step 4, connecting the normally open contact of the extended relay KC1 in the original switch circuit of the coal conveyor belt pull line and the deviation switch to the coil circuit to which the relay is installed;

[0010] Step 5, by observing the indicator light of the monitoring relay, determine whether the pull line or deviation switch of the coal conveyor belt is actuated and the location of the fault point.

[0011] Preferably, step 5 comprises:

[0012] Step 51, connecting the monitoring relay to an AC power source and observing whether its indicator light is on;

[0013] Step 52, pull the pull line and the deviation switch of the coal conveyor belt one by one, and observe whether the indicator light of the monitoring relay remains on;

[0014] Step 53, resetting the pull wire and deviation switch of the coal conveyor belt one by one, and observing whether the indicator light of the monitoring relay remains off;

[0015] Step 54, judging whether the pull line or deviation switch of the coal conveyor belt is actuated and the location of the fault point through the fault judgment criteria.

[0016] Preferably, the fault judgment criteria include: when a fault occurs, if the indicator light of the monitoring relay is on, it is judged that the coal conveyor belt pull wire or the deviation switch is actuated, and the fault point location can be quickly determined by resetting each of the coal conveyor belt pull wires and deviation switches one by one and observing the indicator light of the monitoring relay at the same time.

[0017] Preferably, the monitoring relay described in step 1 is installed according to the existing circuit in the belt conveyor control box, and a base and a housing adapted to the monitoring relay are installed at the same time.

[0018] Preferably, the input side of the relay is 220VAC, and the output side is 24VDC.

[0019] Preferably, the relay is installed according to the existing circuit in the belt conveyor control box and includes: the output side is connected in series with the coal conveyor belt pull wire, the deviation switch and the normally open contact of the relay extension.

[0020] Beneficial effects of the present invention:

[0021] This method can realize the monitoring of all wire pulling and deviation switch circuits by slightly modifying the existing control circuit and adding a relay. When a fault occurs, the fault point can be quickly found and eliminated, thereby greatly improving the fault elimination efficiency and equipment utilization rate at a very low cost, ensuring the safe and reliable operation of equipment and systems, and helping to improve the business efficiency of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 The figure is a schematic diagram of the overall principle of a pull-wire switch according to the prior art.

[0023] Attached Figure 2The present invention is a schematic diagram of the structure of a pull-wire switch tripping circuit that does not include an alarm circuit according to the prior art.

[0024] Attached Figure 3 Schematic diagram of the circuit structure of adding a relay according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the protection scope of the present invention.

[0026] See also Figure 1-3 The coal conveyor belt pull line and deviation switch alarm identification method of this embodiment includes:

[0027] Step 1, installing a monitoring relay in the control box of the belt conveyor where the coal conveyor belt wire is located;

[0028] Step 2, determining a 220V AC power supply from the existing circuit in the control box of the belt conveyor, and connecting it to the coil circuit of the monitoring relay;

[0029] Step 3, check and ensure that the normally open contact of the relay KC1 in the coal conveyor belt pull line and deviation switch circuit is connected to the belt conveyor trip circuit;

[0030] Step 4, connecting the normally open contact of the extended relay KC1 in the original switch circuit of the coal conveyor belt pull line and the deviation switch to the coil circuit to which the relay is installed;

[0031] Step 5, by observing the indicator light of the monitoring relay, determine whether the pull line or deviation switch of the coal conveyor belt is actuated and the location of the fault point.

[0032] As a preferred embodiment, step 5 includes:

[0033] Step 51, connecting the monitoring relay to an AC power source and observing whether its indicator light is on;

[0034] Step 52, pull the pull line and the deviation switch of the coal conveyor belt one by one, and observe whether the indicator light of the monitoring relay remains on;

[0035] Step 53, resetting the pull wire and deviation switch of the coal conveyor belt one by one, and observing whether the indicator light of the monitoring relay remains off;

[0036] Step 54, judging whether the pull line or deviation switch of the coal conveyor belt is actuated and the location of the fault point through the fault judgment criteria.

[0037] As a preferred embodiment, the fault judgment criteria include: when a fault occurs, if the indicator light of the monitoring relay is on, it is judged that the coal conveyor belt pull wire or the deviation switch is actuated, and the fault point location can be quickly determined by resetting each of the coal conveyor belt pull wires and deviation switches one by one and observing the indicator light of the monitoring relay at the same time.

[0038] Preferably, the monitoring relay described in step 1 is installed according to the existing circuit in the belt conveyor control box, and a base and a housing adapted to the monitoring relay are installed at the same time.

[0039] Preferably, the input side of the relay is 220VAC, and the output side is 24VDC.

[0040] Preferably, the relay is installed according to the existing circuit in the belt conveyor control box and includes: the output side is connected in series with the coal conveyor belt pull wire, the deviation switch and the normally open contact of the relay extension.

[0041] The method of this embodiment slightly modifies the existing control circuit and adds a relay to realize the monitoring of all wire pulling and deviation switch circuits. When a fault occurs, the fault point can be quickly found and eliminated, thereby greatly improving the fault elimination efficiency and equipment utilization rate at a very low cost, ensuring the safe and reliable operation of the equipment and system, and helping to improve the business efficiency of the enterprise.

[0042] The technical solutions provided by the embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, those skilled in the art may make changes in the specific implementation methods and application scopes according to the embodiments of the present invention. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A method for identifying the alarm of a coal conveyor belt pull line and a deviation switch, characterized in that: include: Step 1, installing a monitoring relay in the control box of the belt conveyor where the coal conveyor belt wire is located; Step 2, determine a 220V AC power supply from the existing circuit in the control box of the belt conveyor, and connect it to the coil circuit of the monitoring relay; Step 3, check and ensure that the normally open contact of the relay KC1 in the coal conveyor belt pull line and deviation switch circuit is connected to the belt conveyor trip circuit; Step 4, connecting the normally open contact of the relay KC1 in the original switch circuit of the coal conveyor belt pull line and the deviation switch to the coil circuit of the monitoring relay; Step 5, by observing the indicator light of the monitoring relay, determine whether the pull line or deviation switch of the coal conveyor belt is actuated and the location of the fault point; The step 5 comprises: Step 51, connecting the monitoring relay to an AC power source and observing whether its indicator light is on; Step 52, pull the pull line and the deviation switch of the coal conveyor belt one by one, and observe whether the indicator light of the monitoring relay remains on; Step 53, resetting the pull wire and deviation switch of the coal conveyor belt one by one, and observing whether the indicator light of the monitoring relay remains off; Step 54, judging whether the pull line or deviation switch of the coal conveyor belt is actuated and the location of the fault point through the fault judgment criteria.

2. A method for distinguishing the alarm of a pull line and deviation switch of a coal conveyor belt according to claim 1, characterized in that: The fault judgment criteria include: when a fault occurs, if the indicator light of the monitoring relay is on, it is judged that the coal conveyor belt pull wire or the deviation switch is actuated. By resetting each of the coal conveyor belt pull wires and deviation switches one by one and observing the indicator light of the monitoring relay at the same time, the fault point can be quickly located.

3. A method for distinguishing the alarm of a pull line and deviation switch of a coal conveyor belt according to claim 1, characterized in that: The monitoring relay described in step 1 is installed according to the existing circuit in the belt conveyor control box, and a base and a housing adapted to the monitoring relay are installed at the same time.

4. A method for distinguishing the alarm of a pull line and deviation switch of a coal conveyor belt according to claim 3, characterized in that: The monitoring relay is installed according to the existing circuit in the belt conveyor control box, including: the output side coal conveyor belt pull wire, the normally open contact of the deviation switch is connected in parallel and then connected in series with the coil of the relay KC1.

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