CN218950271U - Scraper conveyor monitoring device - Google Patents

Abstract

The utility model belongs to the technical field of scraper conveying, and particularly relates to a scraper monitoring device of a scraper conveyor, which comprises proximity switches S1, S2 and S3 arranged at the tongue plate of a head frame of the scraper conveyor, time relays KT1, KT2 and KT3, intermediate relays J1, J2, J3, relays J4, J5, J6, J7 and a PLC (programmable logic controller), wherein the proximity switches S1, S2 and S3 are arranged parallel to the scraper, the proximity switch S2 is positioned at the central line of the scraper, and the proximity switches S1 and S3 are symmetrically arranged at two sides; according to the utility model, three proximity switches are arranged above the scraper conveyor, and various fault states of the scraper can be identified by utilizing the fault identification circuit, so that the monitoring efficiency of the scraper conveyor is improved.

Description

Scraper conveyor monitoring device

technical field

The utility model belongs to the technical field of scraper conveying, in particular to a scraper monitoring device for a scraper conveyor.

Background technique

Scraper conveyors are widely used in coal mines. They use scrapers to transport coal. In the process of use, there are often shortages of scrapers, broken scrapers, and bent scrapers. Handling, may cause damage to the scraper conveyor or even greater accidents, therefore, manual scraper conveyors are required for real-time monitoring. In addition, sometimes due to the excessive coal on the scraper conveyor or the bad scraper being brought into the bottom of the chute, these defective scrapers cannot be easily found, and their repair will be laborious.

The patent application with the notification number CN2900431Y discloses a scraper conveyor protection device, which detects the scraper through two proximity switches fixed on the bracket to detect the tilting state of the scraper, and then monitors the scraper conveyor. Shutdown protection, however, does not recognize scraper missing, bent, etc.

Utility model content

The utility model overcomes the deficiencies in the prior art, and the technical problem to be solved is: to provide a scraper monitoring device for a scraper conveyor, which can realize accurate on-line monitoring of the status of the scraper.

In order to solve the above technical problems, the technical solution adopted by the utility model is: the scraper conveyor scraper monitoring device, including the proximity switches S1, S2 and S3 set at the tongue plate of the scraper conveyor head frame, and also including the time relay KT1, KT2, KT3, intermediate relays J1, J2, J3, relays J4, J5, J6, J7 and PLC controller, the proximity switches S1, S2 and S3 are arranged parallel to the scraper, and the proximity switch S2 is located at the center of the scraper line, the proximity switches S1 and S3 are symmetrically arranged on both sides;

Proximity switches S1, S2 and S3 are respectively connected in series with time relays KT1, KT2 and KT3 and connected in parallel at both ends of the power supply;

The normally open contact KT1-1 of the time relay KT1, the normally open contact KT2-1 of the time relay KT2, and the normally open contact KT3-1 of the time relay KT3 are connected in series with the intermediate relay J1 at both ends of the power supply;

The normally open contact KT1-2 of the time relay KT1, the normally open contact KT2-2 of the time relay KT2, the normally open contact KT3-2 of the time relay KT3 are connected in parallel with the intermediate relay J2 and connected in series at both ends of the power supply;

The normally open contacts KT1-3, KT3-3 of the time relays KT1, KT3 are connected in series with the intermediate relay J3 at both ends of the power supply;

The normally open contact J1-1 of the intermediate relay J1 and the normally open contact J2-1 of the intermediate relay J2 are connected in series with the relay J4 at both ends of the power supply;

The normally open contact J1-2 of the intermediate relay J1 and the normally open contact J2-2 of the intermediate relay J2 are connected in series with the relay J5 at both ends of the power supply;

The normally open contact J3-1 of the intermediate relay J3 is connected in parallel with the series circuit of the normally open contact J2-2 of the intermediate relay J2 and the series circuit of the relay J5 after being connected in series with the relay J6;

The normally closed contact J2-3 of the intermediate relay J2 is connected in parallel with the series circuit of the normally open contact J2-2 of the intermediate relay J2 and the series circuit of the relay J5 after being connected in series with the relay J7;

The normally open contact J4-1 of the relay J4, the normally open contact J5-1 of the relay J5, the normally open contact J6-1 of the relay J6, the normally open contact J7-1 of the relay J7 and the PLC controller The input terminals are respectively connected, and the output terminals of the PLC controller are connected with the display module.

The scraper conveyor scraper monitoring device also includes display lights L1, L2, L3, L4, and the display lights L1, L2, L3, L4 are respectively connected to the normally open contacts of the relays J4, J5, J6, J7. The contacts J4-2, J5-3, J6-3, and J7-3 are connected in series and connected to both ends of the power supply.

The scraper conveyor monitoring device further includes an encoder for measuring the displacement signal of the scraper conveyor, and the output end of the encoder is connected to the input end of the PLC controller.

The scraper conveyor monitoring device further includes a power supply module, which is used to convert an external 220V AC power supply into a DC voltage to supply power to the circuit.

The scraper monitoring device for a scraper conveyor also includes a relay J8, a relay J9, a normal indicator light L5, and a defect indicator light L6, and one end of the relay J8 and the relay J9 is respectively connected to the output end of the PLC controller , the other end is connected to the positive pole of the power supply module;

After the normal indicator light L5 is connected in series with the normally open contact J8-1 of the relay J8, one end is connected to the positive pole of the power supply module, the other end is connected to the negative pole of the power module, and one end of the defect indicator light L6 is connected to the normally open contact of the relay J9. After the contact J9-1 is connected in series, one end is connected to the positive pole of the power supply module, and the other end is connected to the negative pole of the power module.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model provides a scraper monitoring device for a scraper conveyor. By setting three proximity switches above the scraper conveyor, the proximity switches are used to identify fault signals, and a fault identification circuit is used to detect various fault states of the scraper. Visual display can realize the online monitoring of the scraper conveyor. In addition, using the encoder and proximity switch can realize the location of the scraper fault location.

Description of drawings

Figure 1 shows several possible failure states of existing scraper conveyors;

Fig. 2 is the installation schematic diagram of proximity switch in the utility model embodiment;

Fig. 3 is the schematic diagram of the circuit connection of proximity switch in the utility model embodiment;

Fig. 4 is the schematic diagram of the circuit connection of the intermediate circuit in the utility model embodiment;

Fig. 5 is the schematic diagram of the circuit connection of fault identification circuit in the utility model embodiment;

Fig. 6 is the schematic diagram of the circuit connection of the display circuit in the embodiment of the utility model;

Fig. 7 is the schematic diagram of the circuit connection of the PLC control circuit in the utility model embodiment;

Fig. 8 is a schematic diagram of the circuit for controlling the conveyor in the embodiment of the utility model.

In the figure: 1 is the tongue plate of the head frame, 2 is the scraper, and 3 is the proximity switch.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention , not all embodiments; based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present utility model.

As shown in Figure 2, the embodiment of the present invention provides a scraper conveyor scraper monitoring device, including proximity switches S1, S2 and S3 arranged at the tongue plate of the head frame of the scraper conveyor, as shown in Figures 3-5 As shown, it also includes time relays KT1, KT2, KT3, intermediate relays J1, J2, J3, relays J4, J5, J6, J7, and PLC controller. The proximity switches S1, S2 and S3 are arranged parallel to the scraper, and the proximity switch S2 is located on the center line of the scraper, and the proximity switches S1 and S3 are symmetrically arranged on both sides.

As shown in FIG. 3 , in this embodiment, the proximity switches S1 , S2 and S3 are respectively connected in series with the time relays KT1 , KT2 and KT3 and connected in parallel at both ends of the power supply.

As shown in Figure 4, in the present embodiment, the normally open contacts KT1-1, KT2-1, KT3-1 of the time relays KT1, KT2, KT3 are connected in series with the intermediate relay J1 at both ends of the power supply; The normally open contacts KT1-2, KT2-2, and KT3-2 of the time relays KT1, KT2, and KT3 are connected in parallel with the intermediate relay J2 and connected in series at both ends of the power supply; the normally open contacts of the time relays KT1, KT3 KT1- 3. After KT3-3 is connected in series, it is connected in series with the intermediate relay J3 at both ends of the power supply. The speed of the scraper conveyor is about 0.88m/s, and the width of the scraper is about 40mm. If the signal is transmitted by the proximity switch alone, the time is too short, and there is fear of malfunction. Therefore, in this embodiment, the proximity switch is used to control the power-off delay relay. The time is 2 seconds, counted with the signal of the power-off delay relay.

As shown in Figure 5, the normally open contacts J1-1, J2-1 of the intermediate relays J1, J2 are connected in series with the relay J4 at both ends of the power supply; the normally open contacts J1-2 of the intermediate relays J1, J2 , J2-2 and relay J5 are connected in series at both ends of the power supply; the normally open contact J3-1 of the intermediate relay J3 is connected in series with the normally open contact J2-2 of the intermediate relay J2 and the relay J5 after being connected in series with the relay J6 The series circuit is connected in parallel; the normally closed contact J2-3 of the intermediate relay J2 is connected in parallel with the series circuit of the normally open contact J2-2 of the intermediate relay J2 and the relay J5 after being connected in series with the relay J7;

The normally open contact J4-1, J5-1, J6-1, J7-1 of described relay J4, J5, J6, J7 is respectively connected with the input end of PLC controller, and the output end of described PLC controller is connected with Displays module connections.

Further, the scraper conveyor scraper monitoring device of this embodiment also includes a display circuit, as shown in Figure 6, the display circuit includes display lights L1, L2, L3, L4, the display lights L1, L2, L3, L4 are respectively connected in series with normally open contacts J4-2, J5-3, J6-3, J7-3 of relays J4, J5, J6, J7 and then connected to both ends of the power supply. Through the display circuit, various states of the current scraper can be visually displayed.

Furthermore, the scraper conveyor scraper monitoring device of this embodiment also includes an encoder, the encoder is arranged in the middle of the load counter wheel of the machine head reducer, and one end is installed with an angle iron through the counter wheel fastening bolt , through the encoder, the displacement signal of the scraper can be measured. As shown in Figure 7, the output end of the encoder is connected to the input end of the PLC controller. In addition, for the scraper conveyor with short-circuit chain and short-circuit scraper, the proximity switch of this embodiment can scan the short-connection scraper of the scraper conveyor, and input to the PLC controller according to the contact J4-1 of relay J4 The short-circuit scraper signal can determine the starting position of the scraper conveyor and position it. In addition, the length of the scraper conveyor can be calculated according to the speed of the scraper conveyor and the time interval between two scans of the proximity switch to short-circuit the scraper. Moreover, by using the encoder to measure the displacement signal, the position of the bad scraper or lack of scraper can be located.

Further, the scraper conveyor scraper monitoring device of this embodiment further includes a power module. The power module is used to convert an external 220V AC power into a DC voltage to supply power to the circuit.

Further, as shown in Figure 7, a scraper conveyor scraper monitoring device of this embodiment also includes a relay J8, a relay J9, a normal indicator light L5, a defect indicator light L6, the relay J8, the relay J9 One end is respectively connected to the output end of the PLC controller, and the other end is connected to the positive pole of the power supply module; after the normal indicator light L5 is connected in series with the normally open contact J8-1 of the relay J8, one end is connected to the positive pole of the power supply module. The other end is connected to the negative pole of the power module, and one end of the defect indicator light L6 is connected in series with the normally open contact J9-1 of the relay J9, one end is connected to the positive pole of the power supply module, and the other end is connected to the negative pole of the power module.

Further, as shown in Figure 7, a scraper conveyor scraper monitoring device of this embodiment also includes a relay J10, one end of the relay J10 is connected to the output end of the PLC controller through a selection button, and the other end is connected to the output end of the PLC controller. The positive pole of the power supply of the power supply module is connected; as shown in Figure 8, the normally open contact J10-1 of the relay J10 is connected in parallel with the start button of the scraper conveyor, and the normally open contact J10-2 is connected with the start button of the scraper conveyor The buttons are connected in parallel. By setting the relay J10, when the selection button is closed, the relay J10 can automatically control the working state of the scraper conveyor according to the status of the scraper, so that the scraper conveyor can automatically stop at the damaged scraper position, which is convenient for maintenance.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (5)

1. The scraper monitoring device of the scraper conveyor is characterized by comprising proximity switches S1, S2 and S3 arranged at the tongue plate of the head frame of the scraper conveyor, time relays KT1, KT2 and KT3, intermediate relays J1, J2 and J3, relays J4, J5, J6 and J7 and a PLC controller, wherein the proximity switches S1, S2 and S3 are arranged in parallel with the scraper, the proximity switch S2 is positioned at the central line of the scraper, and the proximity switches S1 and S3 are symmetrically arranged at two sides of the scraper;

the proximity switches S1, S2 and S3 are respectively connected with the time relays KT1, KT2 and KT3 in series and then connected in parallel at two ends of the power supply;

the time relay KT1 is connected with the intermediate relay J1 in series, and then is connected to the two ends of the power supply;

the normally open contact KT1-2 of the time relay KT1, the normally open contact KT2-2 of the time relay KT2 and the normally open contact KT3-2 of the time relay KT3 are connected in parallel and then connected with the intermediate relay J2 in series at two ends of a power supply;

normally open contacts KT1-3 and KT3-3 of the time relays KT1 and KT3 are connected in series and then connected with an intermediate relay J3 in series at two ends of a power supply;

the normally open contact J1-1 of the intermediate relay J1 and the normally open contact J2-1 of the intermediate relay J2 are connected with the relay J4 in series at two ends of the power supply;

the normally open contact J1-2 of the intermediate relay J1 and the normally open contact J2-2 of the intermediate relay J2 are connected with the relay J5 in series at two ends of the power supply;

the normally open contact J3-1 of the intermediate relay J3 is connected in series with the relay J6 and then connected in parallel with a series circuit of the normally open contact J2-2 of the intermediate relay J2 and the relay J5;

the normally closed contact J2-3 of the intermediate relay J2 is connected with the relay J7 in series and then connected with a series circuit of the normally open contact J2-2 of the intermediate relay J2 and the relay J5 in parallel;

the normally open contact J4-1 of the relay J4, the normally open contact J5-1 of the relay J5, the normally open contact J6-1 of the relay J6 and the normally open contact J7-1 of the relay J7 are respectively connected with the input end of the PLC, and the output end of the PLC is connected with the display module.

2. The scraper monitoring device of the scraper conveyor according to claim 1, further comprising display lamps L1, L2, L3 and L4, wherein the display lamps L1, L2, L3 and L4 are respectively connected with normally open contacts J4-2, J5-3, J6-3 and J7-3 of relays J4, J5, J6 and J7 in series and then are connected with two ends of a power supply.

3. The scraper monitoring device of claim 1, further comprising an encoder for measuring a displacement signal of the scraper conveyor, wherein an output of the encoder is connected to an input of the PLC controller.

4. The scraper monitoring device of claim 1, further comprising a power module, wherein the power module is configured to convert an external 220V ac power source into a dc voltage and then power the circuit.

5. The scraper monitoring device of the scraper conveyor according to claim 4, further comprising a relay J8, a relay J9, a normal indicator light L5 and a defect indicator light L6, wherein one end of the relay J8 and one end of the relay J9 are respectively connected with the output end of the PLC, and the other end of the relay J9 is connected with the positive electrode of the power supply module;

after the normal indicator lamp L5 is connected with the normally open contact J8-1 of the relay J8 in series, one end of the normal indicator lamp L5 is connected with the positive electrode of the power supply module, the other end of the normal indicator lamp L6 is connected with the negative electrode of the power supply module, one end of the defect indicator lamp L6 is connected with the normally open contact J9-1 of the relay J9 in series, the other end of the defect indicator lamp L6 is connected with the positive electrode of the power supply module, and the other end of the defect indicator lamp L6 is connected with the negative electrode of the power supply module.

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