Safety protection device suitable for fully mechanized coal mining face belt conveyor

Abstract

The utility model discloses a safety protection device suitable for a fully mechanized coal mining face belt conveyor. The safety protection device comprises a power box, a voice alarm box, an infrared sensor emitter, an infrared sensor receiver, an operation / maintenance change-over switch and a belt conveyor locking / microphone. The power supply box is respectively connected with the voice alarm box, the infrared sensor emitter and the infrared sensor receiver; the infrared sensor emitter and the infrared sensor receiver are fixedly located on the two sides of the tail of the belt conveyor respectively, and the infrared sensor receiver receives infrared signals emitted by the infrared sensor emitter; the infrared sensor receiver is connected with the voice alarm box; and the operation / maintenance change-over switch is respectively connected with the voice alarm box and the belt conveyor locking / microphone. By means of the safety protection device suitable for the fully mechanized coal mining face belt conveyor, belt conveyor tail guarding workers or other operators are effectively warned of dangerous behaviors that the operators work within the safety control range of the rotating portion of the belt conveyor tail in the operation process of the belt conveyor.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mines, in particular to a safety protection device suitable for a belt conveyor on a fully mechanized mining working face. Background Art

[0002] Belt conveyor (belt conveyor for short) is an important means of transportation in the coal flow system of the fully mechanized mining face. As the working face is mined, the amount of cargo is difficult to control. When the amount of cargo is large, the tail of the belt conveyor will be spilled, and the floating coal scraped off by the coal filter at the tail of the belt conveyor will accumulate at the tail of the machine, causing wear of the belt conveyor and affecting the normal delivery of the belt conveyor. During normal production, the belt conveyor is operating normally, and it is difficult to find time to stop the belt to clean up the silted cargo. The personnel guarding the tail of the belt conveyor often take risks to operate. During the operation of the belt conveyor, they enter the safe operating range of the rotating part of the belt conveyor to clean up the silted cargo or other operations, which may cause minor accidents such as touching hands and feet, and serious accidents such as casualties such as the belt conveyor drum rolling people. It can be seen that the protection of the rotating part of the belt conveyor tail is a key point in the safety management of the fully mechanized mining face.

[0003] The traditional way to protect the rotating parts of underground electromechanical equipment is to use protective nets or protective covers, which brings many inconveniences to the maintenance of electromechanical equipment and is not conducive to dynamic observation of electromechanical equipment during operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problem of protecting the rotating parts of underground electromechanical equipment. The traditional methods are protective nets or protective covers, which bring many inconveniences to the maintenance of electromechanical equipment and are not conducive to dynamic observation of electromechanical equipment during operation.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A safety protection device suitable for a belt conveyor in a fully mechanized mining working face, characterized in that it comprises a power supply box 100, a voice alarm box 200, an infrared sensor transmitter 310, an infrared sensor receiver 320, an operation / maintenance conversion switch QHK and a belt conveyor lock / microphone 400;

[0007] The power supply box 100 is connected to the voice alarm box 200, the infrared sensor transmitter 310 and the infrared sensor receiver 320 respectively;

[0008] The infrared sensor transmitter 310 and the infrared sensor receiver 320 are respectively fixed on both sides of the belt conveyor tail, and the infrared sensor receiver 320 receives the infrared signal emitted by the infrared sensor transmitter 310;

[0009] The infrared sensor receiver 320 is connected to the voice alarm box 200; and the operation / maintenance conversion switch QHK is connected to the voice alarm box 200 and the belt conveyor lock / microphone 400 respectively.

[0010] In one embodiment of the present invention, the relay K inside the infrared sensor receiver 320 is connected to the relay K5 of the voice alarm box 200 .

[0011] In one embodiment of the present utility model, the normally open contact K5-2 of the relay K5 is connected in series with the operation / maintenance switch QHK and the belt conveyor lock / microphone 400.

[0012] In one embodiment of the present invention, the normally closed contact BSJ1 of the belt conveyor lock / microphone 400 is connected in series with the start switch QA and the shutdown switch TA of the belt conveyor.

[0013] Compared with the prior art, the beneficial effects of the utility model are: through infrared emission and reception, as well as a language alarm device, it effectively warns the belt conveyor tail caretaker or other operators of dangerous behaviors during the operation of the belt conveyor, and the personnel operate within the safety control range of the rotating part of the belt conveyor tail. It changes the many inconveniences brought by traditional protective nets and protective covers, and eliminates the problem of on-site operators removing protective nets and protective covers without authorization and taking risks. Comprehensively considered, the benefits of this device in underground production safety management are immeasurable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a safety protection device suitable for a belt conveyor in a fully mechanized mining working face according to an embodiment of the utility model.

[0015] Figure 2 This is a schematic diagram of the connection between the belt conveyor lock / microphone and the main control circuit of the belt conveyor according to an embodiment of the utility model.

[0016] Figure 3 This is a schematic diagram of the operation / maintenance conversion switch and belt conveyor lock / microphone connection according to an embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to facilitate those skilled in the art to understand the technical solution of the utility model, the technical solution of the utility model is further explained in conjunction with the drawings in the specification.

[0018] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] See also Figure 1 As shown, the utility model provides a safety protection device suitable for a belt conveyor in a fully mechanized mining working face, comprising a power box 100, a voice alarm box 200, an infrared sensor transmitter 310, an infrared sensor receiver 320, an operation / maintenance conversion switch QHK and a belt conveyor lock / microphone 400.

[0020] The power box 100 is connected to the voice alarm box 200, the infrared sensor transmitter 310 and the infrared sensor receiver 320 respectively. The infrared sensor transmitter 310 and the infrared sensor receiver 320 are respectively fixed on both sides of the belt conveyor tail, and the infrared sensor receiver 320 receives the infrared signal emitted by the infrared sensor transmitter 310. The infrared sensor receiver 320 is connected to the voice alarm box 200, and the operation / maintenance conversion switch QHK is respectively connected to the voice alarm box 200 and the belt conveyor lock / microphone 400. In normal conditions, the operation / maintenance conversion switch QHK is in a closed state.

[0021] See also Figures 1 to 3 As shown, in one embodiment of the utility model, a transformer is provided in the power box 100, and the 127V AC is converted into 12V DC by the transformer, and the voice alarm box 200, the infrared sensor transmitter 310 and the infrared sensor receiver 320 are powered respectively, forming a closed light-controlled electronic fence at the tail of the belt conveyor. The electronic fence adopts the infrared induction principle, and the infrared sensor transmitter 310 emits infrared, and the infrared sensor receiver 320 receives infrared, and the closed management is performed.

[0022] In one embodiment of the present invention, the relay K inside the infrared sensor receiver 320 is connected to the relay K5 of the voice alarm box 200, and the normally open contact K5-2 of the relay K5 is connected in series with the operation / maintenance conversion switch QHK and the belt conveyor lock / microphone 400. In addition, the normally closed contact BSJ1 of the operation / maintenance conversion switch QHK is connected in series with the start switch QA and the shutdown switch TA of the belt conveyor.

[0023] See also Figures 1 to 3As shown, in one embodiment of the utility model, when the start switch QA of the belt conveyor is pressed, the main control circuit contactor of the belt conveyor is energized, and the auxiliary normally open contact KM1 of the main control circuit contactor is closed as a self-protection contact. At this time, the belt conveyor is transported normally. When someone mistakenly enters or approaches the tail of the belt conveyor, that is, when there is an object blocking between the infrared sensor transmitter 310 and the infrared sensor receiver 320, the output signal of the infrared sensor receiver 320 is reversed, the internal relay K is energized, the auxiliary normally open contact K1 of the relay K is closed, and the voice alarm box 200 issues an alarm "No entry to the dangerous area", and at the same time, the relay K5 of the voice alarm box 200 is energized, the normally open contact K5-2 of the relay K5 is closed, and the belt conveyor lock / microphone 400 is energized to achieve the belt conveyor lock. At the same time, the normally closed contact BSJ1 of the belt conveyor lock / microphone 400 is flipped and disconnected, and the control circuit of the belt conveyor is disconnected.

[0024] In addition, in order to solve the problem of alarm when personnel enter during normal belt stop for maintenance, the device is equipped with an additional operation / maintenance conversion switch QHK to cut off the belt conveyor lock / microphone 400 power supply to achieve no lock during power outage for maintenance.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0026] The above-described embodiments merely represent implementation methods of the utility model, and the protection scope of the utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and all of these belong to the protection scope of the utility model.

Claims

1. A safety protection device suitable for a fully mechanized mining face belt conveyor, characterized in that: It comprises a power supply box (100), a voice alarm box (200), an infrared sensor transmitter (310), an infrared sensor receiver (320), an operation / maintenance conversion switch QHK and a belt conveyor lock / microphone (400); The power supply box (100) is respectively connected to the voice alarm box (200), the infrared sensor transmitter (310) and the infrared sensor receiver (320); The infrared sensor transmitter (310) and the infrared sensor receiver (320) are respectively fixed on two sides of the tail of the belt conveyor, and the infrared sensor receiver (320) receives the infrared signal emitted by the infrared sensor transmitter (310); The infrared sensor receiver (320) is connected to the voice alarm box (200); and the operation / maintenance conversion switch QHK is connected to the voice alarm box (200) and the belt conveyor lock / microphone (400) respectively.

2. A safety protection device suitable for a fully mechanized mining face belt conveyor according to claim 1, characterized in that: The relay K inside the infrared sensor receiver (320) is connected to the relay K5 of the voice alarm box (200).

3. A safety protection device suitable for a fully mechanized mining face belt conveyor according to claim 2, characterized in that: The normally open contact K5-2 of the relay K5 is connected in series with the operation / maintenance changeover switch QHK and the belt conveyor lock / microphone (400).

4. A safety protection device suitable for a fully mechanized mining face belt conveyor according to claim 2, characterized in that: The normally closed contact BSJ1 of the belt conveyor lock / microphone (400) is connected in series with the start switch QA and the shut-off switch TA of the belt conveyor.

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