CN219262421U - Down-hole anti-backflow air duct - Google Patents

Abstract

The utility model relates to the technical field of underground safety ventilation, in particular to an underground anti-backflow air duct, which comprises an air inlet duct and an air outlet duct which are horizontally arranged, wherein an anti-backflow air duct with a fan-shaped structure is arranged between the air outlet duct and the air inlet duct, the air outlet duct is communicated with the air inlet duct through the anti-backflow air duct, the arc surface of the anti-backflow air duct is connected with one end of the air outlet duct, an anti-backflow plate is arranged in the anti-backflow air duct, the inner side of the anti-backflow plate is hinged at the center of the anti-backflow air duct through a hinge, the hinge is in contact with the bottom of one end of the air inlet duct, a support column is adhered to the middle of the anti-backflow plate, and one side of the support column is in contact with the bottom wall of the anti-backflow air duct. The underground anti-backflow air duct is small in normal ventilation obstruction, safe and reliable, strong in stability and firm in fixation, and can be used for overcoming the defects in the prior art, and the use requirement of reverse ventilation is met.

Description

Down-hole anti-backflow air duct

Technical Field

The utility model relates to the technical field of underground safety ventilation, in particular to an underground countercurrent-preventing air duct.

Background

The underground operation is a main mining mode of coal mine mining, however, along with the extension of underground depth, a large amount of solid powder and harmful gas such as mineral powder and gas are often generated in a mine, so that underground air quality is poorer and poorer, and the body of a mining personnel is greatly damaged. In order to ensure the normal work of the exploitation personnel, ventilation treatment is often required on the mine, namely fresh air is conveyed into the mine through the air duct so as to adjust the underground environment, and a good working environment is created for the exploitation personnel.

Fresh air is input into the pit, so that the oxygen concentration of a mine can be increased, coal mine dust and gas explosion accidents are easy to occur in the pit, huge personnel and property losses are caused, and in order to ensure the safety and production in the pit, an anti-backflow air duct is often required to be installed on the air duct, so that coal and gas outburst accidents on a tunneling working face in the pit or toxic and harmful gases are prevented from being flushed out of the air duct due to sudden power failure of a fan, the impact wave intensity can be rapidly weakened after the gas explosion disasters occur, reverse ventilation is prevented, the safety of personnel in fresh air outside the sudden air is protected, the personal safety is guaranteed to the maximum extent, and the secondary disasters are prevented from being caused by disaster diffusion.

Through retrieving CN213598007U discloses a reverse partition device for underground ventilation of coal mine, and CN208456654U discloses an anti-reversion device for air duct, including two semicircular ventilation blocking plates are fixed at the middle part of the air duct through the hinge, and through preventing laminating piece or pin, make its ventilation blocking plate keep certain contained angle, but through using discovery, when normal ventilation in the pit, because the ventilation blocking plate is fixed at the middle part of the air duct and keeps certain contained angle, the normal ventilation of air duct has been hindered, leads to the terminal amount of wind of air duct to reduce. In addition, the wind pressure intensity that gas explosion produced in the pit is great, because the closure of two semicircular ventilation barrier plates carries out spacingly with the help of the pin, under the great impact strength's of wind pressure effect, the pin is difficult to keep spacing effect, makes its ventilation barrier plate be difficult to keep the partition effect, and ventilation barrier plate upset is excessive promptly, leads to the dryer unable to seal, makes its harmful gas, dust flow back to fresh air through the iron dryer, aggravates personnel and property loss.

Therefore, the production has small normal ventilation obstruction, prevents the use requirement of reverse ventilation, is safe and reliable, has strong stability, is firmly fixed, and has wide market prospect.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the underground anti-backflow air duct which has the advantages of small normal ventilation obstruction, safety, reliability, strong stability and firm fixation, and can prevent the use requirement of reverse ventilation, and is used for overcoming the defects in the prior art.

The utility model adopts the technical scheme that: the utility model provides an anti-reflux dryer in pit, includes the inlet tube that the level set up and goes out the dryer, play dryer and inlet tube between be equipped with the anti-contrary section of thick bamboo of fan-shaped structure, play dryer is linked together through the anti-contrary section of thick bamboo with the inlet tube, the arc surface of anti-contrary section of thick bamboo is connected with the one end that goes out the dryer, the anti-contrary section of thick bamboo in be equipped with the anti-contrary board, the inboard of anti-contrary board articulates in the centre of a circle department of anti-contrary section of thick bamboo through the hinge, the hinge contacts with the one end bottom of inlet tube, the middle part of anti-contrary board bonds there is the support column, one side of support column contacts with the diapire of anti-contrary section of thick bamboo.

The diameter of the anti-reverse plate is not smaller than the inner diameter of the air inlet cylinder.

The middle upper part of the air inlet cylinder is provided with a buffer strip made of elastic materials, and the buffer strip is adhered to one end of the air inlet cylinder.

The support column adopts a columnar structure made of elastic materials.

The two ends of the anti-reverse cylinder are respectively adhered to the air inlet cylinder and the air outlet cylinder, the arc surface of the anti-reverse cylinder is provided with a communication groove, and one end of the air outlet cylinder is sleeved in the communication groove.

The utility model has the beneficial effects that: firstly, the utility model comprises an air inlet cylinder and an air outlet cylinder which are horizontally arranged, wherein a fan-shaped structure of the air inlet cylinder is arranged between the air outlet cylinder and the air inlet cylinder, the air outlet cylinder is communicated with the air inlet cylinder through the air inlet cylinder, the arc surface of the air outlet cylinder is connected with one end of the air outlet cylinder, the inside of the air inlet cylinder is provided with an anti-reverse plate, the inner side of the anti-reverse plate is hinged at the circle center of the air inlet cylinder through a hinge, the hinge is contacted with the bottom of one end of the air inlet cylinder, the middle of the anti-reverse plate is adhered with a support column, one side of the support column is contacted with the bottom wall of the anti-reverse cylinder, the anti-reverse plate is hinged in the anti-reverse cylinder through the hinge, the anti-reverse plate can rotate around the hinge, a certain included angle is kept between the anti-reverse plate and the bottom wall of the anti-reverse cylinder through the support column, compared with the two semicircular ventilation blocking plates which are fixed at the middle of the air cylinder through the hinge, the blocking of the single anti-reverse plate is smaller than the blocking of the two ventilation blocking plates, so that the blocking of normal ventilation is reduced, and when the blocking of the anti-reverse ventilation is realized, the anti-reverse ventilation requirement is met, and the product is kept against reverse ventilation; secondly, the diameter of the anti-reverse plate is not smaller than the inner diameter of the air inlet cylinder, so that the anti-reverse plate is buckled with one end of the air inlet cylinder under the condition of reverse ventilation, the overlarge rotation angle of the anti-reverse plate is avoided, the anti-reverse plate is stable and reliable to use, and the requirement of safe underground use is met; in addition, the two ends of the anti-reverse cylinder are respectively adhered to the air inlet cylinder and the air outlet cylinder, so that the anti-reverse plate is an integral component with fixed fastness, and the requirement of underground ventilation use is met.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is an enlarged schematic view at B in fig. 1.

Fig. 4 is a schematic perspective view of the present utility model.

Fig. 5 is a schematic view of the structure of the present utility model in use under reverse ventilation.

Fig. 6 is a schematic side view of the present utility model.

Fig. 7 is a schematic diagram of a side view of the present utility model in use under reverse ventilation.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5, 6 and 7, the underground anti-backflow air duct comprises an air inlet duct 1 and an air outlet duct 2 which are horizontally arranged, wherein a fan-shaped anti-backflow air duct 3 is arranged between the air outlet duct 2 and the air inlet duct 1, the air outlet duct 2 is communicated with the air inlet duct 1 through the anti-backflow air duct 3, the circular arc surface of the anti-backflow air duct 3 is connected with one end of the air outlet duct 2, an anti-backflow plate 4 is arranged in the anti-backflow air duct 3, the inner side of the anti-backflow plate 4 is hinged at the center of the anti-backflow air duct 3 through a hinge 5, two ends of the hinge 5 are respectively fixed at the center of the anti-backflow air duct 3 and at one end of the anti-backflow plate 4 through screws, so that the anti-backflow plate 4 can rotate around the hinge 5, the hinge 5 is contacted with the bottom of one end of the air inlet duct 1, a support column 6 is adhered to the middle part of the anti-backflow plate 4, one side of the support column 6 is contacted with the bottom wall of the anti-backflow air duct 3, the anti-backflow plate 4 and the bottom wall of the anti-backflow air duct 3 are supported through the support column 6 at a certain included angle, and the normal air pressure is kept at the bottom wall of the anti-backflow air duct 3, when the anti-backflow air duct 4 is inclined to normally down to the air duct 1, and the normal air inlet duct 1 is pressed down to the normal down to the air inlet duct 2; when reverse ventilation occurs underground, namely ventilation flows to the air inlet cylinder 1 along the air outlet cylinder 2, the reverse ventilation flows between the reverse ventilation plate 4 and the side wall of the reverse ventilation cylinder 3 because the reverse ventilation plate 4 and the bottom wall of the reverse ventilation cylinder 3 keep a certain included angle, and the reverse ventilation plate 4 is pushed to rotate towards the air inlet cylinder 1 under the action of reverse wind pressure, so that the ventilation channel of the utility model is blocked, the utility model is kept closed, and reverse ventilation is avoided.

The diameter of the anti-reverse plate 4 is not smaller than the inner diameter of the air inlet cylinder 1, so that reverse ventilation occurs underground, when the pressure of reverse wind pressure is large, the reverse wind pressure drives the anti-reverse plate 4 to be pressed on one end of the air inlet cylinder 1, namely, the anti-reverse plate 4 is limited, the overlarge rotation angle of the anti-reverse plate 4 is avoided, and when the wind pressure intensity generated by gas explosion occurs underground is large, the anti-reverse plate 4 can still be buckled on the air inlet cylinder 1, so that the stability of the anti-reverse plate is ensured.

The middle upper part of the air inlet cylinder 1 is provided with a buffer strip 7 made of elastic materials, the buffer strip 7 is adhered to one end of the air inlet cylinder 1, the reverse air pressure is prevented from driving the anti-reverse plate 4 to directly impact the air inlet cylinder 1, namely, the impact of the anti-reverse plate 4 is buffered, and the use stability of the air inlet cylinder is improved; the support column 6 adopts a columnar structure made of elastic materials, and the impact of the rotating support column 6 and the anti-reverse plate 4 on the anti-reverse cylinder 3 is buffered, so that the service life of the product is prolonged, and the use stability of the product is further improved; the two ends of the anti-reversion barrel 3 are respectively adhered to the air inlet barrel 1 and the air outlet barrel 2, the circular arc surface of the anti-reversion barrel 3 is provided with a communication groove 8, and one end of the air outlet barrel 2 is sleeved in the communication groove 8, so that the anti-reversion barrel is an integral component with fixed fastness, and the requirement of underground ventilation use is met.

The application method of the product is as follows: as shown in fig. 1, 2, 3, 4, 5, 6 and 7, when the underground ventilation is normal, namely ventilation flows to the air outlet cylinder 2 along the air inlet cylinder 1, the inclined anti-reverse plate 4 is extruded under the action of forward wind pressure, so that the support column 6 is tightly attached to the side wall of the anti-reverse cylinder 3, namely the anti-reverse plate 4 and the bottom wall of the anti-reverse cylinder 3 keep a certain included angle in normal ventilation; when reverse ventilation occurs underground, namely ventilation flows to the air inlet cylinder 1 along the air outlet cylinder 2, the reverse ventilation flows into the space between the reverse ventilation plate 4 and the side wall of the reverse ventilation cylinder 3 due to the fact that a certain included angle is kept between the reverse ventilation plate 4 and the bottom wall of the reverse ventilation cylinder 3, under the action of reverse wind pressure, the reverse ventilation plate 4 is pushed to rotate towards the air inlet cylinder 1, the reverse ventilation plate 4 is buckled at one end of the air inlet cylinder 1, and accordingly the ventilation channel of the product is blocked, the product is kept closed, harmful gas and dust in the pit are prevented from flowing back to fresh wind flow through the iron cylinder, personnel safety in the fresh wind flow of a crisis caused, and the problem of suffocation death of personnel is prevented, and the secondary disaster is caused by disaster diffusion.

The underground anti-backflow air duct is small in normal ventilation obstruction, safe and reliable, strong in stability and firm in fixation, and has a wide market prospect.

Claims (5)

1. The utility model provides an anti-reflux dryer in pit, includes inlet duct (1) and play dryer (2) that the level set up, its characterized in that: the utility model discloses a fan-shaped structure's a section of thick bamboo (3) that prevents is equipped with between a section of thick bamboo (2) and an air inlet section of thick bamboo (1), a section of thick bamboo (2) is linked together through a section of thick bamboo (3) that prevents against, the arc surface of a section of thick bamboo (3) is connected with a section of thick bamboo (2) that goes out, a section of thick bamboo (3) in be equipped with a section of thick bamboo (4) that prevents against, the inboard of a section of thick bamboo (4) articulates in a section of thick bamboo (3) centre of a circle department of preventing against through hinge (5), hinge (5) contact with an end bottom of an air inlet section of thick bamboo (1), the middle part of a section of thick bamboo (4) that prevents against has support column (6), one side of support column (6) contacts with the diapire of a section of thick bamboo (3) that prevents against.

2. The downhole anti-reflux drum of claim 1, wherein: the diameter of the anti-reverse plate (4) is not smaller than the inner diameter of the air inlet cylinder (1).

3. The downhole anti-reflux drum of claim 1, wherein: the upper middle part of the air inlet cylinder (1) is provided with a buffer strip (7) made of elastic materials, and the buffer strip (7) is adhered to one end of the air inlet cylinder (1).

4. The downhole anti-reflux drum of claim 1, wherein: the support column (6) adopts a columnar structure made of elastic materials.

5. The downhole anti-reflux drum of claim 1, wherein: the two ends of the anti-reversion barrel (3) are respectively adhered to the air inlet barrel (1) and the air outlet barrel (2), the arc surface of the anti-reversion barrel (3) is provided with a communication groove (8), and one end of the air outlet barrel (2) is sleeved in the communication groove (8).

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