Hydraulic station fault judgment instrument

Abstract

The utility model discloses a hydraulic station fault judgment instrument, which comprises a power supply module, the power supply module is a 24V power supply module, a 127V power supply is taken from a hydraulic station control box as an input power supply, and the output end of the power supply module is connected in series with a standby normally open contact of an intermediate relay for controlling a cradle or a safety door and an indicator lamp for judging a hydraulic station fault. According to the lighting condition of the indicating lamp, whether the fault type is an electrical fault or a hydraulic system fault can be judged. According to the utility model, the standby normally open contact of the intermediate relay is connected in series with the indicating lamp to classify faults, hydraulic station faults are divided into electrical control system faults and hydraulic transmission system faults, when equipment faults occur, processing personnel can immediately judge fault points according to the lighting condition of the indicating lamp, the fault processing time is shortened, and the working efficiency is improved. The working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of the maintenance of coal mine electromechanical engineering equipment, and particularly relates to a hydraulic station fault judgment instrument. Background Art

[0002] The shaft hoist and the cage are important throat positions in the mine, responsible for the transportation of mine personnel and materials. Except for the fixed maintenance time every day, they run continuously at other times. Once a failure occurs, it will disrupt the normal production order of the mine, and the impact on the mine is huge. Generally, a set of hydraulic stations will be installed above and below the well for the operation of the cage. The main function is to provide hydraulic driving power for the operation of the swing platform and the safety door. Each time the cage runs, the swing platform and the safety door need to act four times. Due to the high action frequency, failures will inevitably occur during daily operation, resulting in the swing platform and the safety door not acting, affecting the operation of the cage. The possible reasons for the failure mainly include operating console button failure, PLC failure, intermediate relay failure, solenoid valve failure, hydraulic pipe oil circuit blockage, oil cylinder oil pump failure, etc. The above failures may all cause the equipment not to act. Because there are many failure points, it is necessary to gradually check the possible causes of the failure when judging the failure, resulting in a long time to handle the failure. Based on the above reasons, we need to improve or research an instrument that can quickly judge the failure to solve the above problems. Content of the Utility Model

[0003] The utility model provides a hydraulic station fault judgment instrument to solve the problem of long fault judgment time of the hydraulic station in the prior art.

[0004] The utility model is realized by adopting the following technical scheme: A hydraulic station fault judgment instrument includes a power supply module. The power supply module is a 24V power supply module, and 127V power supply is taken from the hydraulic station control box as the input power supply. The output end of the power supply module is connected in series with the normally open backup point of the intermediate relay that controls the swing platform or the safety door, and the indicator light for judging the fault of the hydraulic station. According to the lighting situation of the indicator light, the fault type can be judged as an electrical fault or a hydraulic system fault.

[0005] Further, the positive output of the power supply module is connected to the normally open end of the normally open backup point, and the negative output of the power supply module is sequentially connected to the indicator light and the common end of the normally open backup point.

[0006] Further, the indicator light includes an 8-loop indicator light connected in parallel.

[0007] Further, two groups of power supply modules are set. The output end of each group of power supply modules is connected to a group of indicator lights for judging the fault of the hydraulic station, and is connected in series with one group of normally open backup points of the intermediate relay that controls the swing platform or the safety door.

[0008] Further, the two intermediate relays that control each safety door or swing platform switch are connected to the same fault judgment instrument.

[0009] The beneficial effects of the present utility model compared with the prior art are as follows:

[0010] The present utility model classifies faults by connecting the spare normally open points of a intermediate relay in series with an indicator light, dividing the hydraulic station faults into two types: electrical control system faults and hydraulic transmission system faults. When a fault occurs in the equipment, the maintenance personnel can immediately determine the fault point according to the lighting condition of the indicator light, shortening the fault handling time and improving work efficiency. Description of the Drawings

[0011] Figure 1 is the electrical schematic diagram of the present utility model. Specific Embodiments

[0012] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a hydraulic station fault detector of the present utility model with reference to the drawings.

[0013] As Figure 1 shown, a hydraulic station fault detector includes a power supply module, which is a 24V power supply module. A 127V power supply is taken from the hydraulic station control box as the input power supply. The output end of the power supply module is connected in series with the spare normally open points of the intermediate relay that controls the turntable or the safety door, and an indicator light for judging the hydraulic station fault. According to the lighting condition of the indicator light, the fault type can be judged as an electrical fault or a hydraulic system fault.

[0014] By analyzing the hydraulic station control system, the complete control process is that the operator presses the turntable or safety door operation button, the PLC receives the input signal and outputs the signal to the intermediate relay at the same time. After the normally open point of the intermediate relay is closed, the solenoid valve acts, and the cylinders and oil pumps of the turntable and safety door act under hydraulic drive.

[0015] The intermediate relay has 4 groups of normally open points. One group of normally open points is used in normal use, and three groups of normally open points are spare. After the intermediate relay acts, the four groups of normally open points are synchronously attracted. Now, two spare normally open points of the intermediate relay are used to control the indicator light. After the intermediate relay acts, the indicator light is on. After the operator presses the button, if the turntable and safety door do not act, the indicator light being on indicates that there is no fault in the operation table button, PLC input and output, and relay. The fault may be in the solenoid valve, oil circuit blockage, the line from the intermediate relay to the solenoid valve, or the oil pump cylinder. If the indicator light is not on, the cause of the fault is the opposite.

[0016] In this embodiment, the intermediate relay in the control box has 4 sets of normally open contacts, namely normally open contacts 9-1, 10-2, 11-3, and 12-4, and the corresponding normally closed contacts 9-5, 10-6, 11-7, and 12-8. Only one set of normally open and normally closed contacts, 9-1 and 9-5, were connected to the system in the original system. At this time, the other two sets of normally open and normally closed contacts are connected to the indicator. When the operator presses the operation button, the normally open contact disconnects and the normally closed contact closes, and two indicator lights on the indicator light up.

[0017] Take two 127V power circuits from the hydraulic station control box, install 24V power modules respectively to supply power to the indicator. There are two sets of 8-circuit indicator lights in the indicator, which are used as backups for each other. The indicator is of mine explosion-proof type and is wired according to the electrical schematic diagram. Connect the intermediate relays KA5 (main cage stage raise), KA6 (main cage stage lower), KA3 (main cage safety door open), KA4 (main cage safety door close), KA20 (auxiliary cage stage lower), KA21 (auxiliary cage stage raise), KA16 (auxiliary cage safety door open), and KA19 (auxiliary cage safety door close) in the hydraulic station to the indicator lights in the indicator. When operating the stage and safety door, the corresponding two indicator lights light up. Since the safety door and the stage cannot be opened and closed simultaneously, each safety door and stage switch can share a set of indicator lights.

[0018] Taking the raising of the main stage as an example, after the operator presses the operation button, the PLC outputs a signal to the KA5 intermediate relay. The four sets of coils of the intermediate relay act, two indicator lights light up, the solenoid valve acts, and the stage raises. Similarly, KA5 and KA6 control the raising and lowering of the main cage stage, KA3 and KA4 control the opening and closing of the main cage safety door, KA20 and KA21 control the raising and lowering of the auxiliary cage stage, and KA16 and KA19 control the opening and closing of the auxiliary cage safety door.

[0019] After a failure occurs in the original equipment, maintenance personnel need to search for the fault point point by point. The hydraulic station fault judgment instrument of the present utility model classifies the faults into two major categories for fault judgment. One is the electrical fault existing between the operation console and the intermediate relay, and the other is the hydraulic system fault existing between the intermediate relay and the solenoid valve, oil pipe, oil pump, and oil cylinder. Using this fault judgment instrument, the fault point can be quickly and accurately found according to the lighting situation of the indicator lights for processing, greatly shortening the fault handling time, reducing the safety risk, and minimizing the impact on the mine production order.

[0020] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A hydraulic station fault diagnosis instrument, characterized in that: It includes a power module, which is a 24V power module. A 127V power supply is taken from the hydraulic station control box as the input power supply. The output end of the power module is connected in series to the spare normally open point of the intermediate relay that controls the rocking table or the safety door, and the indicator light for judging the hydraulic station fault. According to the lighting of the indicator light, it can be judged that the fault type is an electrical fault or a hydraulic system fault.

2. The hydraulic station fault diagnosis instrument according to claim 1, characterized in that: The output positive pole of the power module is connected to the normally open end of the standby normally open point, and the output negative pole of the power module is connected to the common end of the indicator light and the standby normally open point in sequence.

3. The hydraulic station fault diagnosis instrument according to claim 1 or 2, characterized in that: The indicator light includes 8-circuit indicator lights connected in parallel.

4. The hydraulic station fault diagnosis instrument according to claim 1, characterized in that: Two groups of power modules are provided, and the output end of each group of power modules is connected to a group of indicator lights for judging hydraulic station failure, and is connected in series to one group of spare normally open points of the intermediate relay controlling the rocking table or the safety door.

5. The hydraulic station fault diagnosis instrument according to claim 1 or 4, characterized in that: The two intermediate relays controlling each safety door or rocker switch are connected to the same fault diagnosis instrument.

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