CN107060869B - A kind of mine explosion door pressure release plugging device - Google Patents

Abstract

The invention discloses a mine explosion-proof door pressure relief and sealing device, which belongs to the field of mine explosion-proof technology, and is characterized in that it comprises an explosion-proof door chamber, a rotary explosion-proof door, a supporting device chamber, and a supporting device. The explosion-proof door chamber is arranged on On the side wall of the explosion-proof well, there is a rotary explosion-proof door in the explosion-proof door chamber. The rotary explosion-proof door includes a first rotating shaft, a reset fan and three sealing fans. The sealing fan and the reset fan are evenly spaced around the first rotating shaft. Arranged, and can rotate around the first rotation axis together; the supporting device chamber is arranged on the side wall of the explosion-proof well, opposite to the explosion-proof door chamber, the supporting device is provided at the lower part of the chamber, and one end of the supporting device protrudes to Explosion-proof well; the invention has simple structure, few fault points, safe and stable operation, can open and release pressure in time without external force, greatly reduces the damage effect of shock wave on explosion-proof door, and can quickly reset and block the return air well, Ensure the normal operation of the underground ventilation system.

Description

A mine explosion-proof door pressure relief sealing device

technical field

The invention relates to the field of mine explosion-proof technology, in particular to a pressure relief and sealing device for a mine explosion-proof door.

Background technique

In the underground production of the existing coal mine vertical shaft, once an explosion accident occurs, in order to protect the main fan from the damage of the explosion shock wave, an explosion-proof door is installed. When an explosion occurs, the explosion-proof door is destroyed or flies away from the explosion-proof wellhead to relieve pressure. At the same time, the explosion-proof door needs to be reset in time to avoid short-circuiting of underground ventilation, so that harmful gases cannot be discharged, threatening the safety of underground operators.

Umbrella-shaped explosion-proof manhole covers are often used in the prior art, but there are disadvantages that the explosion-proof manhole covers are easy to break and cannot be reset in time. The invention patent with the application number of 201310232228.9 discloses an explosion-proof door body of a vertical wind shaft and the use of its safe pressure relief and rapid ventilation. The method is to overlap an upper umbrella-shaped door body that can rotate freely on the lower umbrella-shaped door body of the existing explosion-proof door. Equipped with a steel plate and a cavity, the explosion air wave directly impacts the bursting disc through the cavity of the lower door body, and the bursting disc breaks quickly and directly communicates with the atmosphere to complete the pressure relief, avoiding the deformation and damage of the door body when it is subjected to strong impact. However, after the explosion accident, it is necessary to manually rotate the upper door body, so that the upper umbrella surface that has not been impacted and broken is aligned with the three holes in the lower explosion-proof door body, so as to restore the ventilation of the mine. question. The invention patent application with the application number 201610159746.6 discloses an explosion-proof manhole cover device for mine ventilation. At least three return springs arranged evenly are connected to the lower end of the manhole cover, and the other end of each return spring is connected to a block suitable for the annular groove. , the center of the manhole cover runs through a torsion bar that extends into the return air well. When the explosion occurs, the shock wave will bounce the manhole cover. After the pressure is released, it can be quickly and accurately reset under the joint action of the return spring and the buffer spring, which can quickly realize the effective sealing of the wellhead. , but the spring and umbrella-type manhole cover used in this structure are easily damaged and deformed under the action of shock waves, which affects the reset of the explosion-proof manhole cover and has poor stability. The utility model patent with application number 201020615016.0 discloses a revolving explosion-proof door. The revolving door is set to unscrew and release the pressure through the force of the shock wave and the set counterweight, and the gravity imbalance is generated by the deviation of the rotating shaft. The purpose of resetting the explosion-proof door is achieved, but this structure has the following problems: when subjected to the shock wave, the door body is in a static state during the pressure relief stage when it rotates to the upper limit position, and it is at a certain inclination angle to the horizontal plane. Cause damage to the door body, especially the two ends of the door body, which are prone to bending; in addition, the pressure relief process needs to rely on the peripheral counterweight and the connected cables, pulleys and other components. There are many points, and any damage will affect the pressure relief and reset of the explosion-proof door.

Therefore, there is a need for a plugging device with simple structure and few fault points that can be quickly opened for pressure relief and can be reset in time after pressure relief, so as to further improve the operational safety of mine explosion-proof doors.

Contents of the invention

In order to solve the above problems, the present invention provides a mine explosion-proof door pressure relief and sealing device with simple structure, few fault points, and safe and stable operation. damage, and greatly reduce the damage effect of the shock wave on the explosion-proof door. At the same time, it can quickly reset and block the return air shaft to ensure the normal operation of the underground ventilation system.

The technical solution adopted by the present invention to solve the technical problems is: the mine explosion-proof door pressure relief sealing device is characterized in that it includes an explosion-proof door chamber, a rotary explosion-proof door, a supporting device chamber, a supporting device, an explosion-proof The door chamber is set on the side wall of the explosion-proof shaft, and a rotary explosion-proof door is arranged in the explosion-proof door chamber. The rotary explosion-proof door includes a first rotating shaft, a reset fan and three sealing fans. The first rotating shaft It is fixedly installed in the explosion-proof door chamber. The cross-sections of the three sealing sectors form a "T" shape. The angle between the reset sector and the adjacent sealing sector is 90°. The sealing sector and the reset sector Evenly arranged around the first rotation axis, the sealing sector and the reset sector can jointly rotate around the first rotation axis; the supporting device chamber is arranged on the side wall of the explosion-proof well, and is opposite to the explosion-proof door chamber Suppose, the lower part of the chamber of the supporting device is provided with a supporting device, one end of the supporting device protrudes to the explosion-proof well, the supporting device is provided with a second rotating shaft, and the supporting device can rotate around the second rotating shaft in the chamber of the supporting device. The angle is not greater than 45°.

Further, the size of the reset sector is the same as that of the sealing sector, and the mass of the reset sector is greater than that of the sealing sector.

Further, the outer edge of the sealing sector is respectively tangent to the inner edge of the explosion-proof door chamber and the explosion-proof wellhead.

Further, the upper end surface of the support device is straight, and conflicts with the lower surface of the end portion of the sealing sector.

Further, the supporting device can be rotated in the chamber of the supporting device until it is completely placed inside the chamber of the supporting device.

Further, the upper wall of the chamber of the supporting device is provided with an inclination angle of 45° on the side away from the explosion-proof well.

Further, the second rotating shaft is fixedly arranged in the chamber of the supporting device.

Further, the sealing sector, the reset sector and the supporting device are all made of high-strength explosion-resistant steel plates.

Compared with the prior art, the beneficial effect of the present invention is: the set rotary explosion-proof door can rotate around the first rotation axis under the action of the shock wave, can quickly realize opening and pressure relief, and protect the main fan from damage. The lower impact greatly reduces the damage effect of the shock wave on the explosion-proof door; in addition, it cooperates with the heavy reset fan and the support device that can only be swung up to realize the rapid and automatic reset and sealing of the explosion-proof door, that is, after the explosion After the pressure is completed, it will quickly and automatically reset to block the return air wellhead, avoid the occurrence of short-circuit of the underground ventilation, and ensure the normal operation of the underground ventilation system; The components can be quickly and automatically reset and blocked by their own gravity, with fewer failure points.

Description of drawings

Fig. 1 is a top view structural representation of the present invention;

Fig. 2 is the schematic diagram of the cross-sectional structure of A-A direction of the present invention;

Fig. 3 is a partial enlarged view of part B of the present invention.

In the figure: 1. Explosion-proof door chamber, 2. Sealing fan body, 3. Reset fan body, 4. First rotating shaft, 5. Supporting device chamber, 6. Supporting device, 7. Second rotating shaft, 8. Explosion-proof well.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figures 1-3, the present invention provides a mine explosion-proof door pressure relief plugging device, which is characterized in that it includes an explosion-proof door chamber 1, a rotary explosion-proof door, a supporting device chamber 5, and a supporting device 6, The explosion-proof door chamber 1 is arranged on the side wall of the explosion-proof shaft 8, and the explosion-proof door chamber 1 is provided with a rotary explosion-proof door. The rotary explosion-proof door includes a first rotating shaft 4, a reset sector 3 and three sealing sectors 2. The first rotating shaft 4 is fixedly arranged in the chamber 1 of the explosion-proof door, and the cross-sections of the three sealing sectors 2 form a "T" shape, and the reset sector 3 and the adjacent sealing sectors 2 form a 90° included angle, the sealing sector 2 and the reset sector 3 are evenly arranged around the first rotation axis 4, and the sealing sector 2 and the reset sector 3 can rotate around the first rotation axis 4 together; the supporting device The chamber 5 is arranged on the side wall of the explosion-proof well 8, and is opposite to the explosion-proof door chamber 1. The support device 5 is provided with a support device 6 in the lower part of the chamber 5, which is used to support the rotary explosion-proof door to realize explosion-proof For the sealing of the door to the explosion-proof well 8, one end of the supporting device 6 protrudes to the explosion-proof well 8, and the supporting device 6 is provided with a second rotating shaft 7, and the supporting device 6 can rotate around the second rotating shaft 7 in the chamber 5 of the supporting device , and its rotation angle is not greater than 45°.

The reset sector 3 of the present invention is consistent with the size of the sealing sector 2, and the quality of the reset sector 3 is greater than that of the sealing sector 2, so that the rotary explosion-proof door can rotate without hindrance in the explosion-proof door chamber 1, and can ensure The rotary explosion-proof door has a sealing effect on the explosion-proof well 8, and the reset sector 3 can automatically reset under the action of gravity in addition after the pressure is released.

The outer edge of the sealing sector 2 according to the present invention is respectively tangent to the inner edge of the explosion-proof door chamber 1 and the 8 explosion-proof wells.

The upper end surface of the support device 6 described in the present invention is straight, and conflicts with the lower surface of the end portion of the sealing sector 2 .

The supporting device 6 described in the present invention can be rotated in the chamber 5 of the supporting device to be completely placed inside the chamber 5 of the supporting device, without hindering the movement track of the rotary explosion-proof door.

The upper wall of the support device chamber 5 of the present invention is provided with a 45° inclination angle away from the side of the explosion-proof well 8, so as to ensure that the center of gravity of the support device 6 is always biased towards the side of the explosion-proof well 8, so that it can fall back to its original position by its own gravity.

The second rotating shaft 7 described in the present invention is fixedly arranged in the chamber 5 of the supporting device.

The sealing sector 2, the reset sector 3 and the supporting device 6 of the present invention are all made of high-strength anti-explosion steel plates to ensure the integrity of the structure when the mine explodes.

The rotary explosion-proof door provided by the present invention includes three sealing sectors 2 and one reset sector 3, and the four sectors are uniformly rotated and distributed around the first rotating shaft 4, the purpose of which is to ensure the structural stability of the explosion-proof door. It can also ensure the sealing effect of the explosion-proof door on the explosion-proof well 8, and the cost is the lowest; if the number of explosion-proof doors is odd, the stability will be poor, and the sealing performance cannot be guaranteed. If the number is too large, the cost will increase, so four pieces are the best.

The working principle of the present invention is: the initial position of the rotary explosion-proof door of the present invention is shown in Fig. It is tangent to the inner edge of explosion-proof door chamber 1 and explosion-proof well 8. At this time, the explosion-proof door keeps blocking the explosion-proof well 8 and has good balance; when the mine explodes, under the action of the shock wave, the explosion-proof door along the Rotate counterclockwise so that the explosion-proof well 8 communicates with the outside world to complete rapid pressure relief. At the same time, due to the rotary extrusion of the sealing sector 2 and the reset sector 3, the support device 6 rotates to the inside of the support device chamber 5 without hindering The trajectory of the revolving explosion-proof door. After the pressure relief is completed, the support device 6 will fall back to its original position under its own gravity because the center of gravity is always biased towards the side of the explosion-proof well 8. Since the weight of the reset sector 3 is greater than that of each sealing sector 2, if the reset sector 3 is at the first position Quadrant, the reset sector 3 drives the explosion-proof door to rotate clockwise under the action of its own gravity until the reset sector 3 falls to a horizontal position and is supported by the support device 6 to complete the reset block; if the reset sector 3 is in the second or In the third quadrant, the reset sector 3 drives the explosion-proof door to continue to rotate counterclockwise and swing to the right under its own gravity, and then rotates clockwise to the initial position shown in the figure. At this time, the sealing sector 2 in the horizontal position is closed. The supporting device 6 is supported to complete the reset blockage; if the reset fan body 3 is in the fourth quadrant, the reset fan body 3 will drive the explosion-proof door to rotate clockwise to the initial position shown in the figure under the action of its own gravity. The sector 2 is supported by the support device 6 to complete the reset and blockage. Therefore, no matter where the reset sector 3 is, it can finally rely on its own gravity to complete the rapid and automatic sealing of the explosion-proof well through the sealing sector 2 or the reset sector 3 itself. Reset blockage.

The beneficial effects of the present invention are: after the mine explodes, the rotary explosion-proof door set can rotate around the first rotating shaft 4 under the action of the shock wave, which can quickly realize the opening and pressure relief, and protect the main fan from being damaged. impact, which greatly reduces the damage effect of the shock wave on the explosion-proof door; in addition, the heavy reset fan body 3 and the support device 6 that can only be swung up can realize the rapid and automatic reset and sealing of the explosion-proof door, that is, when the explosion-proof door After the pressure is completed, it will quickly and automatically reset to block the return air wellhead, avoid the occurrence of short-circuit of the underground ventilation, and ensure the normal operation of the underground ventilation system; The components can be quickly and automatically reset and blocked by their own gravity, with fewer failure points.

The above description is a preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned embodiment. Under the premise of not departing from the structural principle of the present invention, appropriate improvements can be made to the present invention, and these improvements should be included in the present invention. within the scope of protection.

Claims (8)

1. a kind of mine explosion door pressure release plugging device, it is characterised in that including explosion proof door chamber（1）, rotary explosion-proof door, branch Support arrangement chamber（5）, support meanss（6）, explosion proof door chamber（1）It is arranged on explosion-proof well（8）In side wall, explosion proof door chamber（1）It is interior Rotary explosion-proof door is provided with, the rotary explosion-proof door includes the first rotary shaft（4）, reset fan body（3）And three sealings Fan body（2）, first rotary shaft（4）It is fixedly installed on explosion proof door chamber（1）It is interior, three sealing fan bodies（2）Cross section enclose Into " T " font, fan body is resetted（3）With adjacent seals fan body（2）Between be in 90 ° of angles, the sealing fan body（2）With resetting fan body （3）Around the first rotary shaft（4）It is evenly distributed, the sealing fan body（2）With resetting fan body（3）Can be together about the first rotary shaft （4）Rotation；The support meanss chamber（5）It is arranged on explosion-proof well（8）In side wall, and with the explosion proof door chamber（1）Opposition and If the support meanss chamber（5）Interior bottom is provided with support meanss（6）, support meanss（6）One end evagination is to explosion-proof well（8）, Support meanss（6）On be provided with the second rotary shaft（7）, support meanss（6）Can be in support meanss chamber（5）It is interior to be rotated around second Axle（7）Rotation, its anglec of rotation are not more than 45 °.

2. mine explosion door pressure release plugging device according to claim 1, it is characterised in that the reset fan body（3）With Seal fan body（2）Size is consistent, and resets fan body（3）Quality be more than sealing fan body（2）.

3. mine explosion door pressure release plugging device according to claim 1 or 2, it is characterised in that the sealing fan body（2） Outer respectively with explosion proof door chamber（1）Interior edge and explosion-proof well（8）Mouth is tangent.

4. mine explosion door pressure release plugging device according to claim 1, it is characterised in that the support meanss（6）On End face is in flat, and with sealing fan body（2）The inconsistent cooperation in end lower surface.

5. the mine explosion door pressure release plugging device according to claim 1 or 4, it is characterised in that the support meanss（6） In support meanss chamber（5）It is interior to rotate to being completely disposed at support meanss chamber（5）It is internal.

6. mine explosion door pressure release plugging device according to claim 1, it is characterised in that the support meanss chamber （5）Upper wall is away from explosion-proof well（8）Side is provided with 45 ° of inclinations angle.

7. mine explosion door pressure release plugging device according to claim 1, it is characterised in that second rotary shaft（7） It is fixedly installed on support meanss chamber（5）It is interior.

8. mine explosion door pressure release plugging device according to claim 1, it is characterised in that the sealing fan body（2）, it is multiple Position fan body（3）And support meanss（6）It is made by high intensity antiknock steel plate.