Vertical shaft type ventilation explosion door

Abstract

The utility model relates to the technical field of underground coal mine ventilation systems, and discloses a vertical shaft type ventilation explosion-proof door which comprises a base, an explosion-proof top cover is arranged at the top of the base, a cavity is formed in the bottom of the explosion-proof top cover, a plurality of air outlet holes are formed in the bottom of the inner side of the cavity at equal intervals, and the air outlet holes are communicated with the explosion-proof top cover. An exhaust ring is fixedly connected to the bottom of the explosion-proof top cover, a plurality of exhaust holes are formed in the top of the exhaust ring at equal intervals and communicate with the corresponding air outlet holes correspondingly, a positioning ring is fixedly connected to the bottom of the explosion-proof top cover, and a positioning groove is formed in the top of the base; a plurality of pull rings are fixedly connected to the top of the anti-explosion top cover at equal intervals, and pull ropes are slidably connected to the outer walls of the pull rings. According to the explosion-proof top cover, air flow is guided to the periphery through the exhaust holes, upward impact force of the explosion-proof top cover by the air flow is reduced, the motor rotates to drive the winding drum to pull the pull rope, and the explosion-proof top cover is prevented from being lifted away by the air flow during explosion.

Description

Technical Field

[0001] The utility model relates to the technical field of underground ventilation systems in coal mines, in particular to a vertical shaft type ventilation explosion-proof door. Background Art

[0002] In industrial production, especially in coal mining and chemical industry, the safe operation of ventilation system is very important. In these places, there are flammable and explosive gas and dust risk factors. Once an explosion occurs, it will cause serious accidents. In the development of coal mining industry, due to the increase in mining depth and changes in gas content, higher requirements are placed on the safety of ventilation system.

[0003] After searching, the Chinese patent announcement number is: CN213540463U. The utility model discloses a mining engineering shaft extraction ventilation explosion-proof door, including a shaft body, an explosion-proof door body, a clamping plate, a vent, a sealing top plate, a handle, a threaded sleeve, a threaded rod, a limit plate, a connecting block, a clamping groove, a limit groove, a round rod, a fixing plate, a sealing bottom plate, a connecting plate and a connecting hole. The utility model adopts a combined structure of multiple explosion-proof door bodies. Adjacent threaded rods can be connected by threaded sleeves. At this time, the two threaded rods are respectively clamped in the adjacent The threaded sleeve is then screwed between the two connecting blocks to engage the limit plate inside the limit groove, so as to fix the two adjacent explosion-proof door bodies. A vent is opened on the surface of the explosion-proof door body, and a sealing top plate is provided inside the vent. A sealing bottom plate is provided at the bottom end of the sealing top plate. The top of the sealing bottom plate will be engaged with the inner wall of the explosion-proof door body. When an explosion occurs inside the mine, the sealing bottom plate will be impacted. However, in actual use, when the intensity of the explosion underground is high, the explosion-proof door is blown away by the explosion airflow, and ventilation cannot be restored in the first time. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a vertical shaft ventilation explosion-proof door, which aims to improve the problem in the prior art that when the intensity of the explosion underground is high, the explosion-proof door is blown away by the explosion airflow, so that ventilation cannot be restored in the first time.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a vertical shaft type ventilation explosion-proof door, comprising a base, an explosion-proof top cover is arranged on the top of the base, a cavity is opened at the bottom of the explosion-proof top cover, a plurality of air outlet holes are evenly spaced at the bottom of the inner side of the cavity, an exhaust ring is fixedly connected to the bottom of the explosion-proof top cover, a plurality of exhaust holes are evenly spaced at the top of the exhaust ring, and the plurality of exhaust holes are respectively connected to the corresponding air outlet holes, a positioning ring is fixedly connected to the bottom of the explosion-proof top cover, a positioning groove is opened at the top of the base, a plurality of pull rings are evenly spaced and fixedly connected to the top of the explosion-proof top cover, a plurality of pull ropes are slidably connected to the outer walls of the plurality of pull ropes, a plurality of pull ropes are slidably connected to the other ends of the plurality of pull ropes, a counterweight assembly is arranged at the bottom of the circular ring, support columns are arranged around the outer side of the base, a pull rope assembly is arranged on the top of the plurality of support columns, and a plurality of support mechanisms are arranged around the outer side of the base, and the support mechanism is used to adjust the support columns.

[0006] As a further description of the above technical solution:

[0007] The supporting mechanism includes a base plate, and the multiple base plates are respectively fixedly connected to the bottom of the corresponding supporting columns, and the front and rear sides of the supporting columns are equidistantly provided with limiting holes, and the top and front sides of the base plate are provided with third grooves, and the insides of the two third grooves are slidably connected with supporting legs, and the bottoms of the two supporting legs are fixedly connected with pads, and the middle and upper parts of the two supporting legs on the opposite sides are rotatably connected with limiting bolts, and one end of the two limiting bolts passes through the supporting legs and is threadedly connected in the corresponding limiting holes.

[0008] As a further description of the above technical solution:

[0009] The pull rope assembly includes a hollow plate, and a plurality of fixed rods are fixedly connected to the left and right sides of the interior of the hollow plate, and the outer walls of the plurality of fixed rods are rotatably connected to rotating wheels. A U-shaped frame is fixedly connected to the right side of the hollow plate, and a motor is fixedly connected to the front side of the U-shaped frame. The output end of the motor passes through the U-shaped frame and is fixedly connected to a rotating rod, and a winding drum is fixedly connected to the outer wall of the rotating rod.

[0010] As a further description of the above technical solution:

[0011] The counterweight assembly includes a center rod, which is fixedly connected to the bottom of the ring. A rotating cover is fixedly connected to the middle and upper part of the outer wall of the center rod. The front and rear sides of the rotating cover are fixedly connected to limiting blocks. The bottom end of the center rod is fixedly connected to a counterweight cylinder. The front and rear sides of the inner top of the counterweight cylinder are provided with card slots, and the two card slots are respectively connected to the corresponding limit slots.

[0012] As a further description of the above technical solution:

[0013] A plurality of counterweight blocks are slidably connected inside the counterweight cylinder, a first groove is formed on the top of each of the counterweight blocks, and each of the first grooves is slidably connected to the center rod.

[0014] As a further description of the above technical solution:

[0015] A second groove is formed on the top of the rotating cover, and a handle is rotatably connected inside the second groove.

[0016] As a further description of the above technical solution:

[0017] Both sides of the plurality of support columns are fixedly connected with triangular support frames, and the tops of the plurality of triangular support frames are fixedly connected to the bottom of the hollow plate.

[0018] As a further description of the above technical solution:

[0019] The positioning ring is slidably connected to the positioning groove, and the sizes of the positioning ring and the positioning groove are consistent.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, when an explosion occurs, air flows through the cavity into the exhaust ring, and the air flows around through the exhaust hole to reduce the upward impact force of the explosion-proof top cover by the air flow. The pull rope is pulled by the pull ring on the explosion-proof top cover so that the counterweight cylinder at the other end of the pull rope limits the explosion-proof top cover. The motor rotates to drive the reel to pull the pull rope, so that the limit ring is stuck in the limit groove and returns quickly, thereby preventing the explosion-proof top cover from being blown away by the air flow during the explosion, and returning quickly for ventilation.

[0022] 2. In the utility model, the height of the support column is raised by adjusting the position of the support legs. The different heights of the support legs on both sides of the support column make the pads have different levels, so that the support column is prompted to maintain a horizontal position. The height of the pull rope is adjusted by simultaneously adjusting the two support legs to raise the support column, thereby generating different degrees of pulling force on the explosion-proof top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a vertical shaft type ventilation explosion-proof door proposed by the utility model;

[0024] Figure 2 This is a disassembled diagram of the base structure of a vertical shaft type ventilation explosion-proof door proposed by the utility model;

[0025] Figure 3 This is a partial structural cross-sectional view of a vertical shaft type ventilation explosion-proof door proposed by the utility model;

[0026] Figure 4This is a disassembled diagram of the hollow plate structure of a vertical shaft type ventilation explosion-proof door proposed by the utility model;

[0027] Figure 5 This is a disassembled diagram of the support column structure of a vertical shaft type ventilation explosion-proof door proposed by the utility model;

[0028] Figure 6 This is a disassembled diagram of the counterweight cylinder structure of a vertical shaft type ventilation explosion-proof door proposed by the utility model.

[0029] Legend:

[0030] 1. Base; 2. Support mechanism; 201. Bottom plate; 202. Limiting hole; 203. Third groove; 204. Support leg; 205. Pad; 206. Limiting bolt; 3. Explosion-proof top cover; 4. Cavity; 5. Air outlet; 6. Exhaust ring; 7. Exhaust hole; 8. Positioning ring; 9. Positioning groove; 10. Pull ring; 11. Pull rope; 12. Ring; 13. Support column; 14. Hollow plate; 15. Fixed rod; 16. Rotating wheel; 17. U-shaped frame; 18. Motor; 19. Rotating rod; 20. Winding drum; 21. Center rod; 22. Rotating cover; 23. Limiting block; 24. Counterweight cylinder; 25. Slot; 26. Limiting groove; 27. Counterweight block; 28. First groove; 29. ​​Second groove; 30. Handle; 31. Triangular support frame. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1:

[0032] Reference Figure 1 , Figure 2 and Figure 4The utility model provides an embodiment: a vertical shaft type ventilation explosion-proof door, including a base 1, an explosion-proof top cover 3 is arranged on the top of the base 1, a cavity 4 is opened at the bottom of the explosion-proof top cover 3, a plurality of air outlet holes 5 are evenly spaced at the bottom of the inner side of the cavity 4, an exhaust ring 6 is fixedly connected to the bottom of the explosion-proof top cover 3, a plurality of exhaust holes 7 are evenly spaced at the top of the exhaust ring 6, and the plurality of exhaust holes 7 are respectively connected to the corresponding air outlet holes 5, a positioning ring 8 is fixedly connected to the bottom of the explosion-proof top cover 3, a positioning groove 9 is opened at the top of the base 1, a plurality of pull rings 10 are evenly spaced and fixedly connected to the top of the explosion-proof top cover 3, the outer walls of the plurality of pull rings 10 are slidably connected to pull ropes 11, the other ends of the plurality of pull ropes 11 are slidably connected to circular rings 12, a counterweight assembly is arranged at the bottom of the circular ring 12, and support columns 13 are arranged around the outer side of the base 1, and a plurality of A pull rope assembly is provided on the top of the support column 13, and multiple support mechanisms 2 are provided around the outer side of the base 1. The support mechanisms 2 are used to adjust the support column 13. The pull rope assembly includes a hollow plate 14. Multiple fixing rods 15 are fixedly connected to the left and right sides of the inside of the hollow plate 14. The outer walls of the multiple fixing rods 15 are rotatably connected to a rotating wheel 16. A U-shaped frame 17 is fixedly connected to the right side of the hollow plate 14. A motor 18 is fixedly connected to the front side of the U-shaped frame 17. The output end of the motor 18 passes through the U-shaped frame 17 and is fixedly connected to a rotating rod 19. The outer wall of the rotating rod 19 is fixedly connected to a winding drum 20. The positioning ring 8 is slidably connected to the positioning groove 9. The positioning ring 8 is consistent with the size of the positioning groove 9. Both sides of the multiple support columns 13 are fixedly connected to triangular support frames 31. The tops of the multiple triangular support frames 31 are fixedly connected to the bottom of the hollow plate 14.

[0033] Specifically, when an explosion occurs in the well, the strong airflow generated will rush out of the well. At this time, the airflow will impact the explosion-proof top cover 3, and the airflow will enter the cavity 4 and further flow into the exhaust ring 6. The exhaust holes 7 around the exhaust ring 6 will effectively disperse and guide the airflow to be discharged in all directions, thereby significantly reducing the upward impact force of the airflow on the explosion-proof top cover 3. When the explosion-proof top cover 3 moves upward due to the impact, it will drive the pull ring 10 to rise synchronously. The rise of the pull ring 10 will further pull the pull rope 11, and the other end of the pull rope 11 is connected to the counterweight cylinder 24. The counterweight cylinder 24 pulls the pull rope 11 downward with its own weight , by pulling the rope 11, a downward pulling force is generated on the explosion-proof top cover 3, thereby effectively preventing the explosion-proof top cover 3 from being blown away by the airflow. After the explosion, according to the specific position change of the explosion-proof top cover 3, we will start the corresponding motor 18. The rotation of the motor 18 will drive the rotating rod 19 and the winding drum 20 to rotate synchronously, thereby realizing the winding of the pulling rope 11, so that the explosion-proof top cover 3 will be displaced, and the positioning ring 8 at the bottom thereof will be stuck in the positioning groove 9 to achieve rapid return. The consistent size of the positioning ring 8 and the positioning groove 9 can better seal the vertical shaft, and multiple triangular support frames 31 can reinforce the hollow plate 14 to make the hollow plate 14 more stable. Embodiment 2:

[0034] Reference Figure 1 and Figure 5 The support mechanism 2 includes a bottom plate 201, and a plurality of bottom plates 201 are respectively fixedly connected to the bottom of the corresponding support column 13. The front and rear sides of the support column 13 are equidistantly provided with limit holes 202. The top and rear sides of the bottom plate 201 are provided with third grooves 203. The insides of the two third grooves 203 are slidably connected with support legs 204. The bottoms of the two support legs 204 are fixedly connected with pads 205. The middle and upper parts of the two support legs 204 that are away from each other are rotatably connected with limit bolts 206. One end of the two limit bolts 206 passes through the support legs 204 and is threadedly connected in the corresponding limit holes 202.

[0035] Specifically, when installing the support column 13, the support leg 204 needs to be adjusted accordingly according to the actual ground conditions. In specific operations, the support leg 204 needs to be pulled to cause one side of the support column 13 to rise. At this time, the two pads 205 are on different horizontal planes to ensure that the support column 13 maintains a horizontal state. Then, the limit bolt 206 is rotated to pass through the support leg 204 and screwed into the corresponding limit hole 202 to achieve a stable fixation of the support leg 204. In addition, when it is necessary to adjust the height of the pull rope 11 according to actual needs, the height of the pull rope 11 can also be adjusted accordingly by lifting the support column 13, thereby applying different degrees of pulling force to the explosion-proof top cover 3. Embodiment three:

[0036] Reference Figure 6 The counterweight assembly includes a center rod 21, which is fixedly connected to the bottom of the ring 12. A rotating cover 22 is fixedly connected to the middle and upper part of the outer wall of the center rod 21. The front and rear sides of the rotating cover 22 are fixedly connected to the limiting blocks 23. The bottom end of the center rod 21 is fixedly connected to a counterweight cylinder 24. The front and rear sides of the inner top of the counterweight cylinder 24 are provided with card slots 25. The two card slots 25 are respectively connected to the corresponding limiting slots 26. A plurality of counterweight blocks 27 are slidably connected to the inside of the counterweight cylinder 24. The tops of the plurality of counterweight blocks 27 are provided with first grooves 28. The plurality of first grooves 28 are slidably connected to the center rod 21. A second groove 29 is provided on the top of the rotating cover 22. A handle 30 is rotatably connected to the inside of the second groove 29.

[0037] Specifically, the handle 30 is pulled to rotate the rotating cover 22 to rotate the limit block 23. When the limit block 23 moves in the limit groove 26 and moves to the slot 25, the restriction on the rotating cover 22 is cancelled. At this time, lifting the rotating cover 22 will adjust the quantity of the counterweight blocks 27 in the counterweight cylinder 24, so that the weight of the counterweight cylinder 24 is changed.

[0038] Working principle: When using the vertical shaft ventilation explosion-proof door, the base 1 must be installed on the top of the vertical shaft first. A plurality of support columns 13, pull rope assemblies and counterweight assemblies are installed around the base 1. When an explosion occurs in the shaft, the airflow generated rushes out of the shaft. At this time, the explosion-proof top cover 3 is impacted by the airflow, causing the airflow to enter the cavity 4. At the same time, the airflow flows from the cavity 4 into the exhaust ring 6. At this time, the airflow is discharged to the surrounding areas through the exhaust holes 7 around the exhaust ring 6 to reduce the upward impact of the airflow on the explosion-proof top cover 3. At the same time, when the explosion-proof top cover 3 is pulled upward, it will drive the pull ring 10 to move upward, and the pull ring 10 pulls the pull rope 11 to drive the pull rope 11 The counterweight cylinder 24 on the other side moves downward due to its own weight to pull the pulling rope 11, so that the explosion-proof top cover 3 will not be blown away by the airflow. After the explosion, according to the position change of the explosion-proof top cover 3, the corresponding motor 18 is turned on, and the rotating rod 19 is driven to rotate so that the winding drum 20 rotates to reel in the pulling rope 11 and pull the pull ring 10. At the same time, the pulling rope 11 passes between the wheels 16 on the outer walls of multiple fixed rods 15 to prevent the pulling rope 11 from being entangled and knotted when reeling. At this time, the explosion-proof top cover 3 is displaced, and the bottom positioning ring 8 of the explosion-proof top cover 3 is stuck in the positioning groove 9 so that the explosion-proof top cover 3 returns to its original position quickly.

[0039] When installing the support column 13, the support legs 204 are adjusted according to the ground conditions. The support legs 204 are pulled to move the support columns 13 upward so that the two pads 205 are located at different horizontal planes, so that the support columns 13 maintain a horizontal position. At this time, the limit bolts 206 are rotated to penetrate the support legs 204 and rotate into the corresponding limit holes 202 to fix the support legs 204. At the same time, when it is necessary to pull the rope 11 to generate different pulling forces on the explosion-proof top cover 3, the support columns 13 on both sides can also be raised at the same time to raise the height of the pulling rope 11, thereby generating different degrees of pulling forces on the explosion-proof top cover 3, allowing the pulling rope 11 to pull the explosion-proof top cover 3 more easily.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shaft type ventilation explosion-proof door, comprising a base (1), characterized in that: The top of the base (1) is provided with an explosion-proof top cover (3), the bottom of the explosion-proof top cover (3) is provided with a cavity (4), the inner bottom of the cavity (4) is provided with a plurality of equidistant air outlet holes (5), the bottom of the explosion-proof top cover (3) is fixedly connected with an exhaust ring (6), the top of the exhaust ring (6) is provided with a plurality of equidistant air outlet holes (7), the plurality of exhaust holes (7) are respectively connected with corresponding air outlet holes (5), the bottom of the explosion-proof top cover (3) is fixedly connected with a positioning ring (8), the top of the base (1) is provided with a positioning groove (9), the top of the explosion-proof top cover (3) is fixedly connected with a plurality of pull rings (10) at equal distances, The outer walls of the plurality of pull rings (10) are slidably connected to a pulling rope (11), the other ends of the plurality of pulling ropes (11) are slidably connected to a circular ring (12), a counterweight assembly is arranged at the bottom of the circular ring (12), support columns (13) are arranged on the outer sides of the base (1), a pulling rope assembly is arranged on the tops of the plurality of support columns (13), and a plurality of supporting mechanisms (2) are arranged on the outer sides of the base (1), the supporting mechanisms (2) are used to adjust the supporting columns (13).

2. A shaft type ventilation explosion-proof door according to claim 1, characterized in that: The support mechanism (2) comprises a bottom plate (201), wherein a plurality of the bottom plates (201) are respectively fixedly connected to the bottom of corresponding support columns (13), and the front and rear sides of the support columns (13) are provided with limit holes (202) at equal intervals, and the top and rear sides of the bottom plate (201) are provided with third grooves (203), and the insides of two third grooves (203) are slidably connected with support legs (204), and the bottoms of the two support legs (204) are fixedly connected with pads (205), and the middle and upper parts of the two support legs (204) on the sides away from each other are rotatably connected with limit bolts (206), and one end of the two limit bolts (206) passes through the support legs (204) and is threadedly connected in the corresponding limit holes (202).

3. The shaft type ventilation explosion-proof door according to claim 1, characterized in that: The pull rope assembly comprises a hollow plate (14), wherein the left and right sides of the interior of the hollow plate (14) are fixedly connected to a plurality of fixed rods (15), the outer walls of the plurality of fixed rods (15) are rotatably connected to a rotating wheel (16), the right side of the hollow plate (14) is fixedly connected to a U-shaped frame (17), the front side of the U-shaped frame (17) is fixedly connected to a motor (18), the output end of the motor (18) passes through the U-shaped frame (17) and is fixedly connected to a rotating rod (19), and the outer wall of the rotating rod (19) is fixedly connected to a winding drum (20).

4. The vertical shaft type ventilation explosion-proof door according to claim 1, characterized in that: The counterweight assembly comprises a central rod (21), the central rod (21) being fixedly connected to the bottom of the circular ring (12), a rotating cover (22) being fixedly connected to the middle and upper part of the outer wall of the central rod (21), the front and rear sides of the rotating cover (22) being fixedly connected to limiting blocks (23), the bottom end of the central rod (21) being fixedly connected to a counterweight cylinder (24), the front and rear sides of the inner top of the counterweight cylinder (24) being provided with clamping grooves (25), and the two clamping grooves (25) being respectively connected to corresponding limiting grooves (26).

5. The vertical shaft type ventilation explosion-proof door according to claim 4, characterized in that: A plurality of counterweight blocks (27) are slidably connected inside the counterweight cylinder (24), a first groove (28) is formed on the top of each of the counterweight blocks (27), and each of the first grooves (28) is slidably connected to the center rod (21).

6. A shaft type ventilation explosion-proof door according to claim 4, characterized in that: A second groove (29) is provided on the top of the rotating cover (22), and a handle (30) is rotatably connected inside the second groove (29).

7. The vertical shaft type ventilation explosion-proof door according to claim 1, characterized in that: Both sides of the plurality of support columns (13) are fixedly connected to triangular support frames (31), and the tops of the plurality of triangular support frames (31) are fixedly connected to the bottom of the hollow plate (14).

8. The vertical shaft type ventilation explosion-proof door according to claim 1, characterized in that: The positioning ring (8) is slidably connected to the positioning groove (9), and the positioning ring (8) and the positioning groove (9) have the same size.

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