Automatic control device for underground air door of coal mine

Abstract

The utility model discloses a coal mine underground air door automatic control device, and relates to the technical field of coal mine ventilation. Comprising two groups of air door structures arranged in a base, each air door structure comprises an air duct and an air door hinged in the air duct, a push-pull assembly for controlling opening and closing of the air door is mounted on the inner side wall of the air duct, and a locking assembly for unlocking and locking the air door is arranged at the bottom of the air duct; the push-pull assembly comprises a driving air cylinder, a sliding base is fixed to the output end of the driving air cylinder, a pull rod is hinged to the end of the sliding base, the other end of the pull rod is hinged to the back face of the air door, and a pressure-bearing air bag is arranged between the sliding base and the driving air cylinder in a sleeved mode. The locking assembly comprises a locking air bag contained in the base, and the pressure-bearing air bags in the two air door structures communicate with the locking air bag. According to the utility model, the air door can stably work for a long time in a complex mine environment, and the problem that the air door cannot be completely locked due to failure of a normal locking function is solved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine ventilation technology, specifically to an automatic control device for underground coal mine ventilation doors. Background Technology

[0002] The proper use of mine ventilation facilities is a crucial link in ensuring the stability and reliability of underground ventilation systems in coal mines. In particular, ventilation facilities in production areas where air doors are frequently opened and closed often experience problems such as wear and breakage of the locking wire rope during the use of the counterweight locking device, as well as gas and power outages caused by abnormal underground compressed air or power supply. When the air door locking fails, the air door locking device loses its locking function, causing instability in the ventilation system and seriously affecting the mine's safe production and the system's disaster prevention and mitigation capabilities.

[0003] In an automatic control device for energy-free interlocking of ventilation doors in coal mines, application number CN202321558886.2, two energy storage cylinders are respectively installed behind ventilation doors A and B. One end of each energy storage cylinder is hinged to the wall behind ventilation doors A and B, and the other end is hinged to ventilation doors A and B, respectively. The energy storage cylinder installed on ventilation door A is connected to the interlocking device that controls the opening of ventilation door B, and the energy storage cylinder installed on ventilation door B is connected to the interlocking device that controls the opening of ventilation door A, thus preventing the ventilation doors from being double-opened.

[0004] However, in actual use, the unlocking device relies on the operation of pulling ropes and handles to release the lock. In long-term use or harsh environments, the ropes and handles may wear or get stuck, resulting in unsmooth unlocking or inability to unlock. Due to the large impact and vibration in the mine environment, the locking tongue of the air door may be damaged or worn, affecting its normal locking function and causing the air door to be unable to be completely locked, posing a safety hazard. Utility Model Content

[0005] This invention overcomes the shortcomings of the prior art by proposing an automatic control device for underground ventilation doors in coal mines, which solves the problem of ventilation doors failing to fully close due to the failure of the normal locking function.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] The automatic control device for underground ventilation doors in coal mines includes two sets of ventilation door structures installed in the base. Each ventilation door structure includes a duct and a door hinged in the duct. A push-pull assembly for opening and closing the door is installed on the inner wall of the duct, and a locking assembly for unlocking and locking the door is installed at the bottom of the duct.

[0008] The push-pull assembly comprises a driving cylinder, the output end of the driving cylinder is fixed with a sliding seat, the end of the sliding seat is hingedly installed with a pull rod, the other end of the pull rod is hingedly installed on the back of the air door, and a pressure-bearing air bag is sleeved between the sliding seat and the driving cylinder;

[0009] The locking assembly comprises a locking air bag accommodated in the base, the top of the locking air bag is installed with a piston plate, and the top of the piston plate is fixed with a locking rod matched with the air door.

[0010] The pressure-bearing air bag in one group of air door structures is communicated with the locking air bag in the other group of air door structures, and the pressure-bearing air bag in the other group of air door structures is communicated with the locking air bag in the one group of air door structures.

[0011] Further, the two side walls in the air duct are provided with sliding grooves, the driving cylinder comprises an outer cylinder and an inner piston rod, the outer cylinder is fixed on the inner side wall of the sliding groove, and the end of the sliding seat is fixed on the inner piston rod.

[0012] Further, the connecting part of the sliding seat and the inner piston rod is fixed with a protective ring, the pressure-bearing air bag is fixed between the protective ring and the outer cylinder, and the pressure-bearing air bag is sleeved outside the inner piston rod.

[0013] Further, the sliding seat is fixed with a hinged lug, the two ends of the pull rod are fixed with movable blocks, one group of movable blocks is installed on the hinged lug through a pin shaft, and the other group of movable blocks is hingedly installed on the air door through a pin shaft.

[0014] Further, the base is provided with an accommodating groove matched with the locking assembly, the locking air bag is accommodated in the accommodating groove, and the piston plate is slidably arranged in the accommodating groove.

[0015] Further, the bottom of the air duct is provided with a guide hole corresponding to the accommodating groove, the guide hole and the accommodating groove are communicated, the bottom of the air door is provided with a locking groove, and the locking rod is clamped in the locking groove through the guide hole.

[0016] Further, the air duct is arranged in the base, and the air door is hingedly installed in the air duct through a hinge.

[0017] Further, the air door is of a split type, and an electric control box is fixedly installed on the inner side wall of the air duct.

[0018] Further, the bottom of the air door is provided with universal rollers.

[0019] Further, the air door structure further comprises an energy storage air tank, the energy storage air tank is communicated with the corresponding driving cylinder through a high-pressure pipe, and an electromagnetic valve is arranged on the high-pressure pipe.

[0020] The utility model discloses relative to the beneficial effect produced in prior art is:

[0021] The utility model discloses a push -and -pull subassembly and the design of locking assembly, guarantee the locking coordination between the switch action of air door and air door, in addition, the self -linkage drive mechanism of locking assembly and push -and -pull subassembly makes the control of air door more stable and high -efficient, especially the accurate cooperation of pressure gas bag and locking gas bag, thereby avoided the double -open failure that takes place in traditional air door control system, and the whole system is equipped with energy storage gas tank, avoids the failure caused due to the gas source deficiency or pressure fluctuation, ensures that air door can long -term stable work under the complex environment of mine, and energy storage gas tank as spare air source, and the system does not rely on external gas source or power supply, further improves the independence and reliability of system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole structure schematic diagram of the utility model;

[0023] Figure 2 It is the whole sectional structure schematic diagram of the utility model;

[0024] Figure 3 It is the whole explosion structure schematic diagram of the utility model;

[0025] Figure 4 It is the whole structure schematic diagram of the utility model Figure 3 A part enlarged structure schematic diagram;

[0026] Figure 5 It is the push -and -pull subassembly structure schematic diagram of the utility model;

[0027] Figure 6 It is the local sectional structure schematic diagram of the utility model;

[0028] Figure 7 It is the whole structure schematic diagram of the utility model Figure 6 B part enlarged structure schematic diagram;

[0029] Figure 8 It is the use state structure schematic diagram of the utility model.

[0030] In the drawing: 10, base;20, first air door structure;21, air duct;22, hinge;23, air door;24, electric control box;25, guide hole;26, slide;30, second air door structure;40, push -and -pull subassembly;41, drive cylinder;42, slide;43, pull rod;44, movable block;45, pressure gas bag;50, locking assembly;51, storage groove;52, piston plate;53, locking gas bag;54, locking rod;60, energy storage gas tank. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved clearer and more apparent, the utility model is further described in detail in combination with embodiments and drawings.

[0032] As Figures 1 to 8 shown, the embodiment discloses a coal mine underground air door automatic control device, which comprises first air door structures 20 and second air door structures 30 arranged in a base 10, and the first air door structures 20 and the second air door structures 30 are identical and each comprises an air duct 21, the air duct 21 is arranged inside the base 10, a hinge 22 is arranged on the air duct 21 to hingedly connect an air door 23, a push-pull assembly 40 for opening and closing the air door 23 is arranged on the inner wall of the air duct 21, a locking assembly 50 for unlocking and locking the air door 23 is arranged at the bottom of the air duct 21, the opening and closing of each air door 23 is accurately controlled by the push-pull assembly 40 and the locking assembly 50, two groups of air door structures with the same structure are arranged, and the two groups of air door structures are alternately opened and closed under the joint action of the push-pull assembly 40 and the locking assembly 50, so that smooth running of the air door under any condition is ensured, and a fault, such as double opening of the air door, which seriously affects normal running of the mine ventilation system, is avoided, thereby providing strong guarantee for mine ventilation safety.

[0033] Please refer to Figures 2 to 5 , the push-pull assembly 40 comprises a driving cylinder 41, the output end of the driving cylinder 41 is fixedly connected with a sliding seat 42, the end of the sliding seat 42 is hingedly connected with a pull rod 43, the other end of the pull rod 43 is hingedly connected with the back of the air door 23, a pressure-bearing air bag 45 is arranged between the sliding seat 42 and the driving cylinder 41, the push-pull assembly 40 drives the sliding seat 42 to drive the pull rod 43 and the air door 23 through the driving cylinder 41, so that the opening and closing of the air door 23 are controlled, and it should be noted that the pressure-bearing air bag 45 is an important part of pneumatic control, can provide additional buffering effect when the driving cylinder 41 works, reduces the impact of the pneumatic system, ensures stable running of the system, the pressure-bearing air bag 45 not only buffers the pressure change of the cylinder, but also plays the function of energy storage.

[0034] The slide 26 is arranged on the two side walls of the air duct 21, the driving cylinder 41 comprises an outer cylinder and an inner piston rod, the outer cylinder is fixed on the inner side wall of the slide 26, the sliding seat 42 is fixed on the end of the inner piston rod, the stroke of the driving cylinder 41 ensures that the air door 23 rotates 80° around the hinge 22, the connecting part of the sliding seat 42 and the inner piston rod is fixed with a protective ring, the pressure-bearing air bag 45 is fixed between the protective ring and the outer cylinder, and the pressure-bearing air bag 45 is sleeved on the outer side of the inner piston rod, the sliding seat 42 is fixed with a hinged ear, the two ends of the pull rod 43 are fixed with movable blocks 44, one group of movable blocks 44 is installed on the hinged ear through a pin shaft, and the other group of movable blocks 44 is hingedly installed on the air door 23 through a pin shaft.

[0035] Please refer to Figure 6 and Figure 7 The locking assembly 50 comprises a locking air bag 53 accommodated in the base 10, the top of the locking air bag 53 is provided with a piston plate 52, the top of the piston plate 52 is fixed with a locking rod 54 matched with the air door 23, the base 10 is provided with a receiving groove 51 matched with the locking assembly 50, the locking air bag 53 is accommodated in the receiving groove 51, and the piston plate 52 is slidingly arranged in the receiving groove 51, the bottom of the air duct 21 is provided with a guide hole 25 corresponding to the receiving groove 51, and the guide hole 25 is communicated with the receiving groove 51, the bottom of the air door 23 is provided with a locking groove, and the locking rod 54 is clamped in the locking groove through the guide hole 25, so that the locking rod 54 can accurately pass through the guide hole 25 and be clamped in the locking groove when the air door 23 is locked, thereby improving the locking precision and stability of the air door 23.

[0036] When the air door 23 needs to be locked, external gas can be introduced into the locking air bag 53 to make the locking air bag 53 expand, thereby pushing the piston plate 52 to move on the receiving groove 51, so as to push the locking rod 54 to pass through the guide hole 25 and be clamped in the locking groove at the bottom of the air door 23, thereby completing the locking function of the air door 23. Through the design of pneumatic locking, it can be ensured that the air door 23 is effectively fixed when it is closed, so as to avoid that the air door 23 cannot be tightly closed due to mechanical failure or pneumatic control failure, and the locking effect of the air door 23 is guaranteed. In order to ensure that the locking air bag 53 does not fail in long-term use, considering the high pressure and high humidity in the mine environment, a high-strength corrosion-resistant material is adopted, and the receiving groove 51 is designed to protect the locking air bag 53, so that the device can work stably even in harsh environment.

[0037] The air door 23 is of a double-leaf type, and the inner side wall of the air duct 21 is fixedly provided with an electric control box 24. The bottom of each air door 23 is provided with a universal roller, so that the air door 23 can move smoothly during opening and closing, and the friction during movement of the air door 23 is reduced.

[0038] The pressure-bearing air bag 45 in the first damper structure 20 is communicated with the locking air bag 53 in the second damper structure 30 through the first air pipe, and the pressure-bearing air bag 45 in the second damper structure 30 is communicated with the locking air bag 53 in the first damper structure 20 through the second air pipe. In the interlocking design of the two dampers 23, the push-pull assembly 40 and the locking assembly 50 of each damper 23 are connected with each other through the air pipe system, so that the two groups of dampers 23 are always coordinated during operation. When the damper 23 in the first damper structure 20 is opened, the driving cylinder 41 drives the sliding seat 42 to move and realize contraction, which in turn causes the pressure-bearing air bag 45 to be compressed, and the gas in the pressure-bearing air bag 45 is transmitted to the inside of the locking air bag 53 in the second damper structure 30 through the first air pipe, so that the locking air bag 53 is inflated, the piston plate 52 and the locking rod 54 are synchronously moved upward, and the locking assembly 50 of the second damper structure 30 is triggered to lock the damper 23 in the second damper structure 30. Therefore, one group of dampers 23 can be opened while the other group of dampers 23 is always locked, and the power source for triggering the locking assembly 50 comes from the push-pull assembly 40 when the damper 23 is opened, so that the phenomenon of double opening of the two groups of dampers 23 is effectively prevented, and the instability of the ventilation system is avoided.

[0039] Similarly, when the damper 23 in the open state is to be closed, the driving cylinder 41 is extended to drive the sliding seat 42 to move in the slide 26, and the damper 23 is rotated around the hinge 22 to be closed through the pull rod 43. At this time, the pressure-bearing air bag 45 is in a gradually lengthened state, so that the gas in the locking air bag 53 in the locked state is returned to the pressure-bearing air bag 45 through the air pipe, and then the locking assembly 50 is gradually reset to be in a triggered state.

[0040] It should be noted that the first air pipe and the second air pipe are both fixedly provided with an electric control pressure valve. During the process that the damper 23 in the first damper structure 20 is closed to opened, and the damper 23 in the second damper structure 30 is opened to closed, the gas in the locking air bag 53 in the first damper structure 20 is directly introduced into the pressure-bearing air bag 45 in the second damper structure 30 through the air pipe, and the pressure-bearing air bag 45 at the damper 23 in the first damper structure 20 is in a compressed state, so that the gas in the pressure-bearing air bag 45 is introduced into the first air pipe. After the damper 23 in the second damper structure 30 is opened to completely closed, the electric control pressure valve is controlled to be opened by the electric control box 24, so that the gas in the pressure-bearing air bag 45 in the first damper structure 20 is introduced into the locking air bag 53 in the second damper structure 30 through the first air pipe, the locking assembly 50 is triggered, and the damper 23 in the second damper structure 30 is locked by the locking rod 54, so as to ensure that the locking assembly 50 is locked after the damper 23 is closed.

[0041] Please refer to Figures 1 to 3, the first damper structure 20 and the second damper structure 30 each include an energy storage tank 60, the energy storage tank 60 is communicated with the corresponding drive cylinder 41 through a high-pressure pipe, and an electromagnetic valve is installed on the high-pressure pipe, the drive cylinder 41 of each damper structure is equipped with a high-precision electromagnetic valve, which is controlled through an electric control box 24, the opening and closing of the electromagnetic valve can accurately adjust the air flow and control the working state of the drive cylinder 41, the electric control box 24 starts the drive cylinder 41 through the received control signal to realize the opening and closing action of the damper 23, in addition, the energy storage tank 60 is connected with the drive cylinder 41 through the high-pressure pipe, which ensures that the system can obtain a continuous and stable air source, and the use of the energy storage tank 60 enables the system to continue to operate stably when the air pressure is insufficient or the external air source fails.

[0042] In summary, through the design of the push-pull assembly 40 and the locking assembly 50, the opening and closing action of the damper 23 and the locking coordination between the damper 23 are ensured, thereby avoiding the double opening failure in the traditional damper control system, in addition, the self-linkage driving mechanism of the locking assembly 50 and the push-pull assembly 40 makes the control of the damper 23 more stable and efficient, especially the precise cooperation of the pressure-bearing air bag 45 and the locking air bag 53 can completely avoid the double opening of the damper 23, the whole system is equipped with the energy storage tank 60, which avoids the failure caused by insufficient air source or air pressure fluctuation, and ensures that the damper 23 can work stably for a long time in the complex environment of the mine, the energy storage tank 60 as a backup air source, the system does not rely on external air source or power supply, further improving the independence and reliability of the system.

[0043] The above is a further detailed description of the present application in combination with a specific preferred embodiment, which cannot be regarded as limiting the specific embodiments of the present application to this, for ordinary skilled persons in the technical field to which the present application belongs, under the premise of not departing from the present application, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the present application, and the scope of patent protection is determined by the submitted claims.

Claims

1. Coal mine underground air door automatic control device, including two groups of air door structures arranged in the base (10), the air door structure comprising an air duct (21) and an air door (23) hinged in the air duct (21), characterized in that, A push-pull assembly (40) for opening and closing the air door (23) is mounted on the inner side wall of the air duct (21), and a locking assembly (50) for unlocking and locking the air door (23) is arranged at the bottom of the air duct (21); The push-pull assembly (40) comprises a drive cylinder (41), the output end of the drive cylinder (41) is fixed with a sliding seat (42), the end of the sliding seat (42) is hingedly connected with a pull rod (43), the other end of the pull rod (43) is hingedly connected with the back of the air door (23), and a pressure-bearing air bag (45) is sleeved between the sliding seat (42) and the drive cylinder (41); The locking assembly (50) comprises a locking air bag (53) accommodated in the base (10), the top of the locking air bag (53) is provided with a piston plate (52), and the top of the piston plate (52) is fixed with a locking rod (54) matched with the air door (23); The pressure-bearing air bag (45) in one group of air door structures is communicated with the locking air bag (53) in another group of air door structures, and the pressure-bearing air bag (45) in another group of air door structures is communicated with the locking air bag (53) in one group of air door structures.

2. The automatic control device for the underground air door of a coal mine according to claim 1, characterized in that, Sliding grooves (26) are arranged on the two side walls in the air duct (21), the drive cylinder (41) comprises an outer cylinder and an inner piston rod, the outer cylinder is fixed on the inner side wall of the sliding groove (26), and the end of the inner piston rod is fixed with the sliding seat (42).

3. The automatic control device for the underground air door of the coal mine according to claim 2, characterized in that, A protective ring is fixed at the connection between the sliding seat (42) and the inner piston rod, and the pressure-bearing air bag (45) is fixed between the protective ring and the outer cylinder and is sleeved outside the inner piston rod.

4. The automatic control device for the underground air door of the coal mine according to claim 3, characterized in that, Hinged ears are fixed on the sliding seat (42), the two ends of the pull rod (43) are fixed with movable blocks (44), one group of movable blocks (44) are installed on the hinged ears through a pin shaft, and the other group of movable blocks (44) are hingedly connected with the air door (23) through a pin shaft.

5. The automatic control device for underground air door of coal mine according to claim 1, characterized in that, A receiving groove (51) matched with the locking assembly (50) is arranged in the base (10), the locking air bag (53) is accommodated in the receiving groove (51), and the piston plate (52) is slidingly assembled in the receiving groove (51).

6. The automatic control device for the underground air door of a coal mine according to claim 5, characterized in that, A guide hole (25) corresponding to the receiving groove (51) is arranged at the bottom of the air duct (21), the guide hole (25) is communicated with the receiving groove (51), a locking groove is arranged at the bottom of the air door (23), and the locking rod (54) is clamped in the locking groove through the guide hole (25).

7. The automatic control device for underground air door of coal mine according to claim 1, characterized in that, The air duct (21) is arranged in the base (10), and the air door (23) is hingedly connected in the air duct (21) through a hinge (22).

8. The automatic control device for the underground air door of a coal mine according to claim 7, characterized in that, The air door (23) is of a double-leaf type, and an electric control box (24) is fixedly arranged on the inner side wall of the air duct (21).

9. The automatic control device for underground air door of coal mine according to claim 8, characterized in that, Universal rollers are arranged at the bottom of the air door (23).

10. The automatic control device for underground air door of coal mine according to claim 1, characterized in that, The air door structure further comprises an energy storage gas tank (60), the energy storage gas tank (60) is communicated with the corresponding drive cylinder (41) through a high-pressure pipe, and an electromagnetic valve is arranged on the high-pressure pipe.

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