An emergency drive device for a fire door in a mine

Abstract

The utility model provides a kind of underground fireproof shutter door emergency drive device, it is related to mining safety technical field.This emergency drive device includes motor, reel and power-off clutch, sliding sleeve and large chain disc are installed on reel, among them, sliding sleeve is slidably connected with reel by spline, large chain disc is sleeved on reel;End face occlusion structure is arranged between sliding sleeve and large chain disc, small chain disc and hand crank are connected by chain below large chain disc;Lever is arranged between power-off clutch and sliding sleeve, pull rope and tension spring are connected on lever, pull rope can overcome the resistance of tension spring by being pulled down, so that one end of lever is pressed on sliding sleeve, sliding sleeve is forced to slide and occlude with large chain disc, another end of lever is pressed on the opening of power-off clutch arm at this time, clutch arm is forced to release clutch on reel.Worker only needs to pull down pull rope and rotate hand crank when fire power-off, and shutter door plate can be rolled up or put down, which is helpful for fire prevention, personnel escape and rescue.

Description

Technical Field

[0001] This utility model is specifically an emergency drive device for underground fireproof rolling shutter doors, which relates to the field of mining safety technology. Background Technology

[0002] In the event of a fire underground, toxic and harmful gases can quickly spread to nearby work areas, seriously threatening the lives of personnel. To prevent fire hazards, multiple fireproof roller shutters are installed in the underground passageways. Unlike civilian roller shutters, underground fireproof roller shutters not only have a high fire-resistant sealing rating, but their opening and closing are also completely controlled by a program or buttons.

[0003] Currently, the existing fireproof rolling shutters in underground mines pose a safety hazard: in the event of a power outage or circuit problem, the motor inside the fireproof rolling shutter will engage due to the power failure, making it difficult to open or close the shutter manually. Therefore, it is necessary to install an emergency drive device on the existing fireproof rolling shutters to facilitate manual opening or closing of the shutters during power outages. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses an emergency drive device for underground fireproof rolling shutter doors, the purpose of which is to facilitate manual opening or closing of the rolling shutter door in the event of a power outage.

[0005] The present invention adopts the following technical solution: An emergency drive device for an underground fireproof rolling shutter door includes a motor, a roller, and a power-off brake. A sliding sleeve and a large chain are installed on the roller. The sliding sleeve is slidably connected to the roller via a spline, and the large chain is loosely fitted on the roller. An end-face engagement structure is provided between the sliding sleeve and the large chain. A small chain and a hand crank are connected below the large chain via a chain. A lever is provided between the power-off brake and the sliding sleeve. A pull rope and a tension spring are connected to the lever. Pulling the pull rope downwards overcomes the resistance of the tension spring, causing one end of the lever to press against the sliding sleeve, forcing the sliding sleeve to slide and engage with the large chain. At this time, the other end of the lever presses against the opening of the power-off brake arm, forcing the arm to release the brake on the roller.

[0006] Further improve the technical solution: On the end face of the sliding sleeve, tooth grooves are evenly distributed circumferentially; on the end face of the large chain disc, teeth that mesh with the tooth grooves are evenly distributed circumferentially.

[0007] Further improve the technical solution: provide an outwardly opening guide section at the opening of the power failure brake arm.

[0008] Further improve the technical solution: A cylindrical pressure block is set at the other end of the lever. When the pull rope is pulled down, the cylindrical pressure block is pressed into the inlet.

[0009] Further improve the technical solution: an annular groove is provided on the sliding sleeve, and a spherical pressure block is provided at one end of the lever; when the power-off brake is engaged, the spherical pressure block is located in the annular groove.

[0010] Further improve the technical solution: a pull ring is connected to the lower end of the pull rope.

[0011] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are: This invention adds an emergency drive device to existing fireproof rolling shutters. The emergency drive device mainly consists of a pull rope, lever, small chain, hand crank, and a sliding sleeve and large chain mounted on the roller. When an emergency opening or closing of the fireproof rolling shutter is needed, the operator pulls down the pull rope and turns the hand crank to roll up or lower the shutter door.

[0012] This utility model facilitates the manual opening or closing of fireproof rolling shutters, eliminating safety hazards and aiding in fire prevention, personnel escape, and rescue in the event of a fire. Attached Figure Description

[0013] Appendix Figure 1 The diagram shown is a schematic representation of the overall structure of an underground fireproof rolling shutter door.

[0014] Appendix Figure 2 The diagram shown is a structural schematic of the power-off brake when it is engaged.

[0015] Appendix Figure 3 The diagram shown illustrates the emergency operation of an underground fireproof rolling shutter door.

[0016] Appendix Figure 4 The diagram shown illustrates the emergency actuation of the power-off brake.

[0017] In the attached diagram: 1. Motor; 2. Reel; 3. Power-off brake; 3.1. Brake arm; 3.2. Electromagnet; 3.3. Compression spring; 4. Large chain disc; 5. Small chain disc; 6. Chain; 7. Hand crank; 8. Sliding sleeve; 9. Lever; 9.1. Cylindrical pressure block; 9.2. Spherical pressure block; 10. Pull rope; 11. Tension spring; 12. Roller shutter door panel. Detailed Implementation

[0018] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] An emergency drive device for underground fireproof rolling shutters, relating to the field of mining safety technology, is mainly used to solve the problem of difficulty in manually opening and closing fireproof rolling shutters after a power outage in existing technologies. The composition and working principle of this utility model are described in detail below.

[0020] See attached document Figure 1 The underground fireproof rolling shutter door includes a motor 1, a roller 2, a rolling shutter door panel 12, and a power-off brake 3. The motor 1 is connected to the roller 2 and drives the roller 2 to rotate. The rolling shutter door panel 12 is connected to the roller 2, and can be rolled up or down when the motor 1 rotates.

[0021] See attached document Figure 2 The power-off brake 3 is mounted on the roller spool 2. The power-off brake 3 has a pair of gripping arms 3.1, a pair of electromagnets 3.2, and a compression spring 3.3 connecting the pair of gripping arms 3.1. When the motor 1 rotates, the electromagnets 3.2 are energized, causing the pair of gripping arms 3.1 to open outwards through magnetic attraction, releasing the brake on the roller spool 2. At this time, the motor 1 can drive the roller spool 2 to rotate. When the motor 1 stops or a power outage occurs, the electromagnets 3.2 are de-energized. At this time, the pair of gripping arms 3.1 retract inwards under the action of the compression spring 3.3, braking the roller spool 2 and preventing the roller shutter door panel 12 from moving.

[0022] All of the above are existing technologies.

[0023] See attached document Figure 1-4To address the difficulty of manually opening and closing the fireproof rolling shutter door after a power outage, a sliding sleeve 8 and a large chain disc 4 are installed on the roller 2. The large chain disc 4 is loosely fitted onto the roller 2. An internal spline is provided inside the sliding sleeve 8, and an external spline is provided on the roller 2. The sliding sleeve 8 is slidably connected to the roller 2 through the spline structure. When the motor 1 rotates, the spline drives the sliding sleeve 8 to rotate with the roller 2, while the large chain disc 4 cannot rotate with the roller 2.

[0024] An end-face engagement structure is provided between the sliding sleeve 8 and the large chain disc 4. In this embodiment, tooth grooves are evenly distributed circumferentially on the right end face of the sliding sleeve 8, and teeth corresponding to the tooth grooves are evenly distributed circumferentially on the left end face of the large chain disc 4.

[0025] A small chain disc 5 is located below the large chain disc 4, and the small chain disc 5 is connected to the large chain disc 4 via a chain 6. A hand crank 7 is connected to the small chain disc 5, and turning the hand crank 7 will rotate the large chain disc 4.

[0026] A lever 9 is provided between the power-off brake 3 and the sliding sleeve 8. A tension spring 11 and a cylindrical pressure block 9.1 are provided at the left end of the lever 9, and a pull rope 10 and a ball-shaped pressure block 9.2 are provided at the right end of the lever 9. A pull ring is connected to the lower end of the pull rope 10. In addition, an annular groove is provided on the sliding sleeve 8, and an outwardly opening guide part is provided at the opening of the arm 3.1 of the power-off brake 3.

[0027] Working principle: Refer to the appendix Figure 3-4 During a power outage, the power-off brake 3 engages, making it difficult to manually close or open the roller shutter panel 12. When an emergency opening or closing of the roller shutter panel 12 is required, the operator pulls down the pull rope 10, overcoming the resistance of the tension spring 11 to rotate the lever 9 clockwise. At this time, the spherical pressure block 9.2 at the right end of the lever 9 presses against the left end face of the sliding sleeve 8, forcing the sliding sleeve 8 to slide to the right. The sliding sleeve 8 is then connected to the large chain disc 4 through the meshing of the teeth on the toothed groove. Simultaneously, the cylindrical pressure block 9.1 at the left end of the lever 9 presses into the guide portion of the opening of the clamping arm 3.1, forcing the clamping arm 3.1 to release the brake on the roller shaft 2. After the sliding sleeve 8 is connected to the large chain disc 4, the large chain disc 4 can connect to the external spline on the roller shaft 2 through the internal spline on the sliding sleeve 8. At this time, the operator turns the hand crank 7, driving the roller shaft 2 to rotate through the chain 6, thereby raising or lowering the roller shutter panel 12. Because the number of teeth on the large chain disc 4 is greater than that on the small chain disc 5, workers can drive the roller shutter door panel 12 to roll up or down with less force.

[0028] See attached document Figure 1-2After the roller shutter door panel 12 is rolled up or down, the operator releases the pull rope 10. At this time, the lever 9 rotates counterclockwise under the action of the tension spring 11, causing the cylindrical pressure block 9.1 at the left end of the lever 9 to disengage from the guide part. Under the action of the compression spring 3.3, the clamping arm 3.1 retracts inward to clamp the roller 2. At the same time, the spherical pressure block 9.2 at the right end of the lever 9 presses against the left end face of the annular groove of the sliding sleeve 8, forcing the sliding sleeve 8 to slide to the left, causing the sliding sleeve 8 to disengage from the large chain disc 4. At this time, turning the hand crank 7 will only cause the large chain disc 4 to spin freely and will not drive the roller 2 to rotate.

[0029] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An emergency drive device for a fireproof rolling shutter door in an underground mine, comprising a motor, a roller, and a power-off brake, characterized in that: A sliding sleeve and a large chain are installed on the reel. The sliding sleeve is slidably connected to the reel via a spline, and the large chain is loosely fitted on the reel. An end-face engagement structure is provided between the sliding sleeve and the large chain. A small chain and a hand crank are connected below the large chain via a chain. A lever is provided between the power-off brake and the sliding sleeve. A pull rope and a tension spring are connected to the lever. Pulling the pull rope downwards can overcome the resistance of the tension spring, causing one end of the lever to press against the sliding sleeve, forcing the sliding sleeve to slide and engage with the large chain. At this time, the other end of the lever presses against the opening of the power-off brake arm, forcing the brake arm to release the brake on the reel.

2. The emergency drive device for a fireproof rolling shutter door in an underground mine as described in claim 1, characterized in that: On the end face of the sliding sleeve, tooth grooves are evenly distributed circumferentially; on the end face of the large chain disc, teeth that mesh with the tooth grooves are evenly distributed circumferentially.

3. The emergency drive device for a fireproof rolling shutter door in an underground mine as described in claim 1, characterized in that: An outwardly opening guide section is provided at the opening of the power failure brake arm.

4. The emergency drive device for a fireproof rolling shutter door in an underground mine as described in claim 3, characterized in that: A cylindrical pressure block is provided at the other end of the lever. When the pull rope is pulled down, the cylindrical pressure block is pressed into the inlet.

5. The emergency drive device for a fireproof rolling shutter door in an underground mine as described in claim 1, characterized in that: An annular groove is provided on the sliding sleeve, and a spherical pressure block is provided at one end of the lever; when the power-off brake is engaged, the spherical pressure block is located in the annular groove.

6. The emergency drive device for a fireproof rolling shutter door in an underground mine as described in claim 1, characterized in that: A pull ring is attached to the lower end of the pull rope.

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