CN214672254U - Automatic power-off device for dynamic pressure tunnel of coal mine - Google Patents
Automatic power-off device for dynamic pressure tunnel of coal mine Download PDFInfo
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- CN214672254U CN214672254U CN202120769736.0U CN202120769736U CN214672254U CN 214672254 U CN214672254 U CN 214672254U CN 202120769736 U CN202120769736 U CN 202120769736U CN 214672254 U CN214672254 U CN 214672254U
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Abstract
The utility model discloses an automatic power-off device for a coal mine dynamic pressure tunnel, which is supported in the coal mine dynamic pressure tunnel, comprises a vertical rod, the vertical rod is fixed on a base, a micro switch box is arranged at the front end of the vertical rod, a micro switch is arranged in the micro switch box, a normally open contact or a normally closed contact of the micro switch is connected with a control switch of a power supply chamber through a cable, a telescopic rod mechanism is arranged at the front end of the micro switch box, one end of a telescopic rod of the telescopic rod mechanism extends into the micro switch box and keeps a set distance with a button of the micro switch, the vertical rod is arranged on the ground of a coal mine dynamic pressure tunnel through the base, the other end of the telescopic rod is propped against the top end of the coal mine dynamic pressure tunnel, when the rock burst causes the coal mine dynamic pressure roadway to deform up and down beyond a set distance, one end of the telescopic rod touches a button of the micro switch, and a normally open contact or a normally closed contact of the micro switch sends out a control signal to control the power supply chamber to cut off power transmission of a cable in the dynamic pressure roadway.
Description
Technical Field
The utility model relates to a colliery dynamic pressure tunnel auto-power-off device.
Background
The rock burst is one of the most serious natural disasters in coal mines worldwide, and before the occurrence, a macroscopic sign is not generated generally, coal and rock masses are thrown out suddenly, rapidly and violently, so that supports are damaged, banners are roof fall, a roadway is blocked, personnel are injured, operators are injured, and the operators are injured by crashing, falling and crushing, or even die due to choking of the roadway. At present, with the continuous increase of coal mining depth in China, rock burst disasters present more and more serious development situations, and great threats are caused to the safety production of coal mines and the life safety of coal mine workers.
Because there is generally no macroscopic sign before the occurrence of the impact ground pressure, if the upper-level protection of the power supply lines on two roadways of the working face fails, the power supply lines or electrical equipment can be damaged when the impact ground pressure is generated, so that short circuit or electric leakage can be caused to generate open fire, and the accident can be enlarged due to explosion caused by contact with harmful gas or coal dust.
Therefore, a set of dynamic pressure roadway automatic power-off device is developed to prevent coal dust or gas explosion accidents caused by short circuit or electric leakage of a power supply line, and the device has important significance in the aspects of ensuring safe production and the like of an impact ground mine.
Disclosure of Invention
The utility model aims at providing a colliery dynamic pressure tunnel automatic power-off device through set up a micro-gap switch in the pole setting of a pressurized indentation, realizes taking place the rock burst and leads to tunnel group portion and bottom plate to bulge and exceed the power supply line power supply automatic power-off function when 5 cm. The coal dust or gas explosion accident caused by short circuit or electric leakage of the power supply circuit due to impact ground pressure is prevented.
In order to realize the purpose, the technical scheme of the utility model is that:
an automatic power-off device for a coal mine dynamic pressure roadway, which is supported in the coal mine dynamic pressure roadway and comprises a vertical rod, wherein the upright pole is fixed on a base, the front end of the upright pole is provided with a microswitch box, a microswitch is arranged in the microswitch box, a normally open contact or a normally closed contact of the microswitch is connected with a control switch of a power supply chamber through a cable, the front end of the microswitch box is provided with a telescopic rod mechanism, one end of a telescopic rod of the telescopic rod mechanism extends into the microswitch box and keeps a set distance with a button of the microswitch, the upright pole is arranged on the ground of the coal mine dynamic pressure tunnel through the base, the other end of the telescopic rod is propped against the top end of the coal mine dynamic pressure tunnel, when the rock burst causes the coal mine dynamic pressure roadway to deform up and down beyond a set distance, one end of the telescopic rod touches a button of the micro switch, and a normally open contact or a normally closed contact of the micro switch sends out a control signal to control the power supply chamber to cut off power transmission of a cable in the dynamic pressure roadway.
The scheme is further as follows: the telescopic link mechanism comprises a telescopic link, one end of the telescopic link is a threaded rod, the telescopic link is provided with a boss at the tail end side of the threaded rod, the threaded rod of the telescopic link extends into the micro-switch box, a spring is sleeved into the threaded rod and arranged between the boss and the upper end face of the micro-switch box, the telescopic link is fixed on the micro-switch box through a nut screw-in threaded rod in the micro-switch box, and a set distance between one end of the telescopic link and the micro-switch button is controlled by an adjusting nut.
The scheme is further as follows: the upright stanchion is a telescopic upright stanchion with adjustable length.
The scheme is further as follows: the microswitch is an explosion-proof microswitch.
The utility model has the advantages that: simple structure, simple to operate has realized taking place the rock burst and has leaded to the tunnel group portion and the bottom plate to swell and exceed the automatic power-off function of power supply line power when 5cm, and protection equipment and personnel do not receive electrical equipment to cause secondary accident and bodily injury.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present embodiment, it should be noted that the terms "connected" and "disposed" should be interpreted broadly, for example, the "connection" may be a wire connection or a mechanical connection; the 'placing' can be fixedly connected placing or integrally formed placing. The specific meanings of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to specific situations.
An automatic power-off device for a coal mine dynamic pressure roadway is supported in the coal mine dynamic pressure roadway, as shown in figure 1, the device comprises a vertical rod 1, the vertical rod 1 is a telescopic vertical rod with adjustable length and comprises a main pipe 101 and a telescopic pipe 102 inserted in the main pipe, the telescopic pipe 102 is fixed through a screw 2 on the side wall of the main pipe 101, wherein the main pipe 101 of the vertical rod is fixed on a base 3, the circumferential surface of the base 3 is provided with a through hole for fixing on the ground through a bolt, the front end of the telescopic pipe 102 of the vertical rod is provided with a microswitch box 4, a microswitch 401 is arranged in the microswitch box 4, for the explosion-proof requirement of a coal mine, the microswitch 401 is an explosion-proof microswitch, a normally open contact or a normally closed contact of the microswitch 401 is connected with a control switch of a power supply room through a cable 402, the cable adopts MHYP-2 7/0.37 communication cable, the front end of the microswitch box 4 is provided with a telescopic rod mechanism 5, one end of a telescopic rod 501 of the telescopic rod mechanism 5 extends into the micro switch box and keeps a set distance a with a button 401-1 of the micro switch, the set distance a is 5cm in practical application, a vertical rod 1 is installed on the ground of a coal mine dynamic pressure tunnel through a base 3, the other end of the telescopic rod 501 abuts against the top end of the coal mine dynamic pressure tunnel, when rock burst causes the coal mine dynamic pressure tunnel to deform up and down beyond the set distance, one end of the telescopic rod 501 extending into the micro switch box 4 touches the button of the micro switch, and a normally open contact or a normally closed contact of the micro switch sends a control signal to control a control switch of a power supply room to cut off power transmission of a cable in the dynamic pressure tunnel.
Wherein: the telescopic rod mechanism 5 comprises a telescopic rod 501, one end of the telescopic rod is a threaded rod 501-1, a boss 501-2 is arranged at the tail end side of the threaded rod 501-1 of the telescopic rod 501, the threaded rod 501-1 of the telescopic rod 501 extends into the microswitch box 4, a spring 501-3 is sleeved in the threaded rod 501 and is arranged between the boss 501-2 and the upper end face 403 of the microswitch box, the telescopic rod 501 is elastically fixed on the microswitch box in a telescopic way by screwing the nut 502 into the threaded rod in the microswitch box, the set distance a between one end of the telescopic rod and the microswitch button 401-1 can be controlled by adjusting the nut, because the telescopic rod is fixed only by the nut 502 in the microswitch box, therefore, the telescopic rod can be stretched up and down and can also be swung back and forth and left and right to form a universal telescopic rod, and the set distance a between one end of the telescopic rod and the micro switch button 401-1 can be changed by swinging back and forth and left and right to touch the micro switch.
The working principle of the device is as follows: when the roadway is pressed to cause two sides to protrude or the bottom plate is bulged and deformed, the universal movable rod of the explosion-proof microswitch in the area can be driven to move downwards in an inclined mode or the device moves upwards. When the stroke of the micro-switch box exceeds 5cm, the explosion-proof micro-switch button in the micro-switch box 4 is actuated to close or open the contact of the micro-switch, and then the low-voltage side remote control brake-separating switch which causes the low-voltage transformation of the belt head electromechanical chamber is actuated through the MHYP-2 x 7/0.37 communication cable to cause the power failure of the auxiliary power supply loop.
The device of the embodiment is arranged in a dynamic pressure roadway, and after manual testing, the device is firm to install, sensitive and reliable in action, strong in environmental interference resistance, easy to maintain, free of misoperation, small in installation floor area and free of influence on safe passing of personnel and vehicles.
And (4) safety benefit analysis: the device starts from field practice, and can effectively prevent a power supply line or electrical equipment from being damaged after a dynamic pressure roadway generates strong impact ground pressure, and the serious potential safety hazard that open fire causes gas or coal dust explosion is generated. The economic loss of the mine caused by secondary accidents is avoided, the personal safety of the majority of workers is guaranteed, and the added value of the mine and the company production is indirectly promoted.
Economic benefits are as follows: the device is a safety technical measure, the main benefit is safety benefit, and in the aspect of economic benefit, the equipment cost, the processing cost, the installation cost and the later maintenance cost of each set of the device are 200 yuan/set. For example, if a coal mine in an eastern-won area of inner Mongolia is taken as an example, a coal dust explosion accident caused by electrical equipment can be avoided, and the initial estimation can reduce the economic loss by 100 ten thousand yuan (excluding casualties and good aftermath expenses).
The application prospect is as follows: along with the continuous deepening of the mining depth in China, the stress state of surrounding rocks gradually worsens, so that the number of mine pressure impact disasters is continuously increased, meanwhile, because of the sudden and destructive property of the impact mine pressure, the roadway electrical equipment is easy to be seriously damaged when the impact mine pressure occurs, and may cause secondary accidents of coal dust or gas explosion, threaten mine safe production and personnel life safety, the design and the use of the equipment can be widely applied to rock burst mines and coal and gas outburst mines, reduce secondary accidents caused by gas or coal dust explosion, effectively avoid the loss of mine economy and personnel safety caused by the explosion, and simultaneously, the equipment has the advantages of low installation and maintenance cost, sensitive and reliable action, strong environment interference resistance, small installation occupied area, no influence on the safe passing of personnel and vehicles, obvious safety benefit and economic benefit and good application prospect.
The safety of auxiliary transportation driving of the auxiliary inclined shaft of the coal mine is improved, the occurrence of major accidents of vehicle damage and death caused by out-of-control of the vehicle is avoided, the life safety of drivers and passengers is ensured, and the life and property loss caused by the occurrence of accidents is avoided.
Claims (4)
1. An automatic power-off device for a coal mine dynamic pressure roadway, which is supported in the coal mine dynamic pressure roadway and comprises a vertical rod, it is characterized in that the upright pole is fixed on a base, a micro switch box is arranged at the front end of the upright pole, a micro switch is arranged in the micro switch box, a normally open contact or a normally closed contact of the micro switch is connected with a control switch of a power supply room through a cable, a telescopic rod mechanism is arranged at the front end of the micro switch box, one end of a telescopic rod of the telescopic rod mechanism extends into the micro switch box and keeps a set distance with a button of the micro switch, the upright pole is arranged on the ground of a coal mine dynamic pressure tunnel through the base, the other end of the telescopic rod is propped against the top end of the coal mine dynamic pressure tunnel, when the rock burst causes the coal mine dynamic pressure roadway to deform up and down beyond a set distance, one end of the telescopic rod touches a button of the micro switch, and a normally open contact or a normally closed contact of the micro switch sends out a control signal to control the power supply chamber to cut off power transmission of a cable in the dynamic pressure roadway.
2. The automatic power-off device for the dynamic pressure roadway of the coal mine as claimed in claim 1, wherein the telescopic link mechanism comprises a telescopic link, one end of the telescopic link is a threaded rod, the telescopic link is provided with a boss at the tail end side of the threaded rod, the threaded rod of the telescopic link extends into the micro switch box, a spring is sleeved in the threaded rod and is arranged between the boss and the upper end face of the micro switch box, the telescopic link is fixed on the micro switch box through a nut screwed into the threaded rod in the micro switch box, and an adjusting nut controls the set distance between one end of the telescopic link and a micro switch button.
3. The automatic power-off device for the coal mine dynamic pressure tunnel according to claim 1, wherein the vertical rod is a telescopic vertical rod with adjustable length.
4. The automatic power-off device for the dynamic pressure roadway of the coal mine according to claim 1, 2 or 3, wherein the microswitch is an explosion-proof microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120769736.0U CN214672254U (en) | 2021-04-15 | 2021-04-15 | Automatic power-off device for dynamic pressure tunnel of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120769736.0U CN214672254U (en) | 2021-04-15 | 2021-04-15 | Automatic power-off device for dynamic pressure tunnel of coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214672254U true CN214672254U (en) | 2021-11-09 |
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ID=78462575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120769736.0U Active CN214672254U (en) | 2021-04-15 | 2021-04-15 | Automatic power-off device for dynamic pressure tunnel of coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214672254U (en) |
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2021
- 2021-04-15 CN CN202120769736.0U patent/CN214672254U/en active Active
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