WO2023115867A1

WO2023115867A1 - Protection device for telescopic cold cutting machine for coal mine, and method of use

Info

Publication number: WO2023115867A1
Application number: PCT/CN2022/101275
Authority: WO
Inventors: 王磊; 陈礼鹏; 王安铖; 朱传奇; 李少波; 袁秋鹏; 刘怀谦; 邹鹏
Original assignee: 安徽理工大学
Priority date: 2021-12-22
Filing date: 2022-06-24
Publication date: 2023-06-29
Also published as: CN114178992A; CN114178992B

Abstract

A protection device for a telescopic cold cutting machine for a coal mine, and a method of use. The protection device comprises a handheld device and a protection support (1), wherein the protection support (1) is internally provided with a pressure sensor (2) and an infrared sensor (4); and the protection support (1) is mounted in front of a spray head (7) of a cold cutting machine. The protection device further comprises a first single-chip microcomputer (20), a second single-chip microcomputer (30) and a main controller (40), wherein an input interface of the first single-chip microcomputer (20) is connected to the pressure sensor (2), and an output interface of the first single-chip microcomputer (20) is connected to the main controller (40); and an input interface of the second single-chip microcomputer (30) is connected to the infrared sensor (4), and an output interface of the second single-chip microcomputer (30) is connected to the main controller (40). Firstly, the application range can be expanded by extending and shortening a handheld telescopic rod (6); secondly, a position in front of the spray head (7) is effectively protected by means of a top plate (12), so that casualties can be avoided; and finally, the infrared sensor (4) and the pressure sensor (2) are combined to achieve the automatic stopping of cutting, thereby achieving dual protection of a cold cutting device.

Description

A kind of protective device and using method of retractable cold cutting machine for coal mine

technical field

The invention relates to a protection device, in particular to a protection device and a using method of a retractable cold cutting machine used in coal mines.

Background technique

In recent years, the issue of safety production in coal mines has been widely concerned by people. In the underground production of coal mines, cutting operations such as bolt cutting, roadway maintenance, and roadblock cleaning are often encountered. At present, underground workers often use hydraulic shears or traditional cutting technology to operate, which will cause inconvenient construction and low work efficiency, and the cutting heat effect and cutting sparks generated by traditional cutting technology will cause gas (coal dust) explosion accidents.

In order to solve the above problems, a safe cold cutting technology suitable for the dangerous environment of flammable, explosive and high-gas coal mines has been invented, that is, water jet cutting technology. However, the nozzle pressure (30-38MPa) of the cold cutting device currently used in the underground is relatively high. After the bolt and equipment are cut, there is no protective device in front of the nozzle, which will cause casualties and potential safety hazards, and the length of the equipment cannot be adjusted. The scope of application is limited and the efficiency is low.

Contents of the invention

The purpose of the present invention is to provide a protection device and a method of use of a retractable cold cutting machine for coal mines. By starting the infrared sensor and the pressure sensor, the two sensors work at the same time, and the emitting device of the infrared sensor emits infrared rays. When the pressure sensor reaches the threshold value or When the receiving device of the infrared sensor receives the infrared rays emitted by the emitting device of the infrared sensor, it will automatically close the water valve switch, realizing the automatic control of the cutting of the cold cutting machine, and the overall structure of the protection device is safer. First, the scope of application can be expanded by extending and shortening the hand-held telescopic rod; second, the effective protection of the position in front of the nozzle can be realized through the top plate, which can avoid casualties; finally, the automatic stop of cutting is realized by combining the infrared sensor and the pressure sensor, which realizes the Double protection for cold cutting devices.

The purpose of the present invention can be achieved through the following technical solutions:

A kind of protective device of retractable cold cutting machine used in coal mines, the protective device includes a hand-held device and a protective bracket, a pressure sensor and an infrared sensor are arranged in the protective bracket, the protective bracket is installed in front of the nozzle of the cold cutting machine, and the protective device also includes The first single-chip microcomputer, the second single-chip microcomputer and the main controller.

The input interface of the first single-chip microcomputer is connected to the pressure sensor, the output interface of the first single-chip microcomputer is connected to the main controller, the input interface of the second single-chip microcomputer is connected to the infrared sensor, and the output interface of the second single-chip microcomputer is connected to the main controller.

Further, the handheld device includes a hand-held telescopic rod, a hose is set inside the hand-held telescopic rod, the nozzle of the cold cutting machine is connected to the hose, the water nozzle of the nozzle is a nozzle, and the nozzle of the cold cutting machine is installed on the output of the hand-held telescopic rod. end.

Further, a hand handle is fixed on one side of the hand-held telescopic rod, and the first single-chip microcomputer, the second single-chip microcomputer and the main controller are all installed in the hand-hold handle.

Further, the support includes a top plate, one side of the top plate is provided with a bottom plate, symmetrically distributed pillars are vertically connected between the bottom plate and the top plate, the pressure sensor is located on the top plate, and the transmitting device and the receiving device of the infrared sensor are respectively located on the two pillars .

A method of using a protection device for a retractable cold cutting machine for coal mines, the method of use is as follows:

By telescoping the hand-held telescopic rod, the nozzle of the cold cutting machine can reach the proper position, insert the anchor to be cut between the two pillars, the cold cutting machine starts to work, turn on the water valve switch, and the nozzle generates high-speed water flow, so that the water flow touches the anchor Start cutting.

Start the infrared sensor and the pressure sensor to work at the same time, the transmitter of the infrared sensor emits infrared rays, and when the pressure sensor reaches the threshold or the receiving device of the infrared sensor receives the infrared rays emitted by the transmitter of the infrared sensor, the water valve switch is automatically closed.

Further, before the cutting is completed, all the infrared rays emitted by the emitting device of the infrared sensor are irradiated on the cut bolt. At this time, the receiving device of the infrared sensor does not receive the signal and continuously outputs a low-level signal.

When the bolt cutting is completed, the receiving device of the infrared sensor receives the signal, and outputs a high-level signal to the second single-chip microcomputer through the conversion circuit, and the second single-chip microcomputer sends a signal to the main controller and then closes the water valve switch to realize the automatic stop of cutting.

At the same time, due to the high pressure of the nozzle, and it cannot guarantee that the water flow is completely used to cut the bolt, it may be sprayed onto the roof. Therefore, when the bolt is cut, the pressure sensor on the roof continues to receive pressure signals, and the pressure sensor will The signal is sent to the first microcontroller.

When the work of cutting the bolt is finished, the nozzle will continue to spray to the top plate, and at this time, the threshold of the pressure sensor will be reached, and the signal will be output to the main controller, thereby closing the water valve switch.

Further, the pressure of the nozzle 7 is 30-38MPa, and the threshold of the pressure sensor is 33-37MPa.

Beneficial effects of the present invention:

1. The protection device of the present invention works simultaneously by starting the infrared sensor and the pressure sensor. The emitting device of the infrared sensor emits infrared rays. When the pressure sensor reaches the threshold or the receiving device of the infrared sensor receives the infrared rays emitted by the emitting device of the infrared sensor, the water valve is automatically closed. The switch realizes the automatic control of the cutting of the cold cutting machine;

2. The overall structure of the protection device of the present invention is safer. Firstly, the scope of application can be expanded by extending and shortening the hand-held telescopic rod; secondly, the effective protection of the position in front of the nozzle can be realized through the top plate, which can avoid casualties; finally, combined with the infrared sensor And the pressure sensor to realize the automatic stop of cutting, which realizes the double protection of the cold cutting device.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the protective device of the present invention;

Fig. 2 is a partial structural schematic diagram of the protection device of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of the protection device of the present invention;

Fig. 4 is a schematic diagram of the internal structure of the handle of the present invention;

Fig. 5 is a flow chart of the use of the protection device of the present invention;

Fig. 6 is a schematic diagram of the use of the protection device of the present invention.

In the figure: 1-protective bracket, 11-pillar, 12-top plate, 14-bottom plate, 2-pressure sensor, 4-infrared sensor, 7-nozzle, 6-hand-held telescopic rod, 8-handle, 9-water valve switch, 10-hose, 60-nozzle, 20-first single-chip, 20-second single-chip, 40-main controller, 50-bolt.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "surrounding" etc. Indicating orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention .

A kind of protective device of telescopic cold cutting machine used in coal mines, the protective device includes a hand-held device and a protective bracket 1, as shown in Figure 1, Figure 3 and Figure 4, the protective bracket 1 is provided with a pressure sensor 2 and an infrared sensor 4, the protection The bracket 1 is installed in front of the spray head 7 of the cold cutting machine, and the protection device also includes a first single-chip microcomputer 20 , a second single-chip microcomputer 30 and a main controller 40 .

The input interface of the first single-chip microcomputer 20 is connected to the pressure sensor 2, the output interface of the first single-chip microcomputer 20 is connected to the main controller 40, the input interface of the second single-chip microcomputer 30 is connected to the infrared sensor 4, and the output interface of the second single-chip microcomputer 30 is connected to the main controller 40.

The handheld device includes a hand-held telescopic rod 6, a hand-held handle 8 is fixed on one side of the hand-held telescopic rod 6, and a hose 10 is set inside the hand-held telescopic rod 6. The nozzle 7 of the cold cutting machine is connected to the hose 10, and the nozzle of the nozzle 7 is Nozzle 60, the spray head 7 of cold cutting machine is installed on the output end of hand-held telescoping rod 6.

The first single-chip microcomputer 20 , the second single-chip microcomputer 30 and the main controller 40 are all installed in the hand-held handle 8 .

Support 1 comprises top plate 12, and as shown in Figure 2, one side of top plate 12 is provided with bottom plate 14, is vertically connected with the pillar 11 of symmetrical distribution between bottom plate 14 and top plate 12, and pressure sensor 2 is positioned at top plate 12, and infrared sensor 4 The transmitting device and the receiving device are respectively located on two pillars 11 .

A method of using a protective device for a retractable cold cutting machine for coal mines, as shown in Figure 5 and Figure 6, the method of use is as follows:

Insert the anchor rod 50 to be cut between the two pillars 11, and stretch the hand-held telescopic rod 6 to make the nozzle 7 of the cold cutting machine reach a suitable position, the cold cutting machine starts to work, turn on the water valve switch 9, and the nozzle 60 generates high-speed water flow , so that the water flow contacts the anchor rod 50 to start cutting.

Start the infrared sensor 4 and the pressure sensor 2 to work at the same time, the transmitter of the infrared sensor 4 emits infrared rays, and when the pressure sensor 2 reaches the threshold or the receiving device of the infrared sensor 4 receives the infrared rays sent by the transmitter of the infrared sensor 4, the water valve switch is automatically closed 9.

Before the cutting is completed, all the infrared rays shine on the cut anchor rod 50. At this time, the receiving device of the infrared sensor 4 does not receive the signal and continues to output a low-level signal. When the cutting of the anchor rod 50 is completed, the receiving device of the infrared sensor 4 receives the signal. When the signal is received, the high-level signal is output to the second single-chip microcomputer 30 through the conversion circuit, and the second single-chip microcomputer 30 sends a signal to the main controller 40 and then closes the water valve switch 9 to realize the automatic stop of cutting.

Simultaneously, because the pressure of nozzle 7 is relatively large (30～38MPa), and can't guarantee that water flow is used for cutting anchor rod 50 completely, there will be the situation that sprays to roof 12, so when cutting anchor rod 50, the pressure on roof 12 The sensor 2 continuously receives the pressure signal, and the pressure sensor 2 transmits the signal to the first single-chip microcomputer 20 .

When the work of cutting the anchor rod 50 is finished, the nozzle 7 will continue to spray to the top plate 12, and at this moment, the threshold value (35MPa) of the pressure sensor 2 will be reached, and the signal will be output to the main controller 40, thereby closing the water valve switch 9.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements are possible, which fall within the scope of the claimed invention.

Claims

A protection device for a retractable cold cutting machine used in coal mines, the protection device includes a hand-held device and a protection bracket (1), characterized in that a pressure sensor (2) and an infrared sensor (4) are arranged inside the protection bracket (1) , the protection bracket (1) is installed before the shower head (7) of the cold cutting machine, and the protection device also includes a first single-chip microcomputer (20), a second single-chip microcomputer (30) and a main controller (40);

The input interface of the first single-chip microcomputer (20) is connected to the pressure sensor (2), the output interface of the first single-chip microcomputer (20) is connected to the main controller (40), and the input interface of the second single-chip microcomputer (30) is connected to the infrared sensor (4), The output interface of the second single-chip microcomputer (30) is connected with the main controller (40).
A protection device for a telescopic cold cutting machine used in coal mines according to claim 1, wherein the handheld device includes a hand-held telescopic rod (6), and a hose (10) is sleeved inside the hand-held telescopic rod (6) , the shower head (7) of cold cutting machine connects flexible pipe (10), and the water spout of shower head (7) is nozzle (60), and the shower head (7) of cold cutting machine is installed in the output end of hand-held telescopic rod (6).
The protective device for a retractable cold cutting machine for coal mines according to claim 2, characterized in that, one side of the hand-held telescopic rod (6) is fixed with a hand-held handle (8), the first single-chip microcomputer (20), Both the second single-chip microcomputer (30) and the main controller (40) are installed in the handle (8).
A kind of protection device for telescopic cold cutting machine for coal mine according to claim 3, characterized in that, the support (1) includes a top plate (12), and one side of the top plate (12) is provided with a bottom plate (14), There are symmetrically distributed pillars (11) vertically connected between the base plate (14) and the top plate (12), the pressure sensor (2) is located on the top plate (12), and the transmitting device and the receiving device of the infrared sensor (4) are respectively located on the two pillars. (11) on.
A method of using a protective device for a retractable cold cutting machine for coal mines according to claim 4, wherein the method of use is as follows:

By telescoping the hand-held telescopic rod (6), the nozzle (7) of the cold cutting machine reaches a suitable position, and the anchor rod (50) to be cut is inserted between the two pillars (11), the cold cutting machine starts to work, and the water valve is opened The switch (9), the nozzle (60) produces a high-speed water flow, so that the water flow contacts the anchor rod (50) and starts cutting;

Start the infrared sensor (4) and the pressure sensor (2), the two sensors work at the same time, the emitting device of the infrared sensor (4) emits infrared rays, when the pressure sensor (2) reaches the threshold or the receiving device of the infrared sensor (4) receives the infrared rays During the infrared ray that the emitter of sensor (4) sends, closes water valve switch (9) automatically.
A method for using a protective device for a retractable cold cutting machine for coal mines according to claim 5, wherein all the infrared rays emitted by the emitting device of the infrared sensor (4) shine on the cut bolt before the cutting is completed. (50), now the receiving device of the infrared sensor (4) does not receive the signal and continues to output a low-level signal;

When anchor rod (50) cutting is finished, the receiving device of infrared sensor (4) receives signal, gives second single-chip microcomputer (30) through conversion circuit output high-level signal, and second single-chip microcomputer (30) sends signal to master controller ( 40) Then close the water valve switch (9) to realize the automatic stop of cutting;

Simultaneously, because the pressure of nozzle (7) is bigger, and can't guarantee that water flow is used for cutting bolt (50) completely, there will be the situation that sprays to top plate (12), so when cutting bolt (50), top plate (12 The pressure sensor (2) on the ) continuously receives the pressure signal, and the pressure sensor (2) will transmit the signal to the first single-chip microcomputer (20);

When the work of cutting the bolt (50) is finished, the nozzle (7) will continue to spray to the top plate (12), and at this moment, the threshold value of the pressure sensor (2) will be reached, and the signal will be output to the main controller (40), thereby Close the water valve switch (9).
The method of using a protection device for a retractable cold cutting machine for coal mines according to claim 6, wherein the pressure of the nozzle 7 is 30-38 MPa, and the threshold of the pressure sensor is 33-37 MPa.