A pneumatic retractable rotary safety door for use in a coal mine

Abstract

This utility model belongs to the field of coal mine roadway safety technology, aiming to solve the problem of inadequate separation measures for personnel and vehicles in the bottom material yard. It provides a pneumatically operated retractable rotating safety door for underground coal mines. The control box is located on the coal wall inside the material yard. The control box includes a control button and a pneumatic valve. The control button controls the valve core of the pneumatic valve to switch directions. Both the control button and the pneumatic valve are connected to an underground air source. Two sets of door assemblies are respectively installed on the left and right coal walls at the entrance of the material yard. Each door assembly includes a telescopic door, a rotating door, a telescopic pneumatic cylinder, and a rotating pneumatic cylinder. The rotating door is rotatably connected to the coal wall via heavy-duty hinges and is driven by the rotating pneumatic cylinder. The telescopic door is slidably connected within the rotating door's interlayer and is driven by the telescopic pneumatic cylinder. The pneumatic valve is connected to the corresponding telescopic or rotating pneumatic cylinder. This device can achieve safe isolation between the bottom material yard and the transshipment station, ensuring that personnel cannot arbitrarily enter the lane during vehicle operation.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine roadway safety technology, specifically relating to a pneumatic retractable rotating safety door for use in underground coal mines. Background Technology

[0002] Due to the limited width and narrow space of underground coal mine roadways, personnel are strictly prohibited from walking on them during material transportation. The "Coal Mine Safety Regulations" explicitly stipulate that the management rule of "pedestrians not walking on vehicles, and vehicles not walking on pedestrians" must be strictly enforced.

[0003] However, in actual production on site, due to the high degree of arbitrariness and mobility of the operators, violations of regulations occur frequently. Utility Model Content

[0004] In order to solve at least one of the above-mentioned technical problems in the prior art, this utility model provides a pneumatic retractable rotating safety door for use in underground coal mines.

[0005] This utility model adopts the following technical solution: a pneumatic telescopic rotating safety door for underground coal mines, including a control box and two sets of door assemblies; wherein the control box is installed on the coal wall inside the material yard, and the control box includes a control button and a pneumatic valve. The control button is used to control the valve core of the pneumatic valve to switch directions. Both the control button and the pneumatic valve are connected to the underground air source; the two sets of door assemblies are respectively installed on the left and right coal walls at the entrance of the material yard. The door assembly includes a telescopic door, a rotating door, a telescopic pneumatic cylinder, and a rotating pneumatic cylinder. The rotating door is rotatably connected to the coal wall by a heavy-duty hinge and is driven by the rotating pneumatic cylinder. The telescopic door is slidably connected in the interlayer of the rotating door and is driven by the telescopic pneumatic cylinder. When the rotating door rotates to an angle of 90 degrees with the coal wall and both telescopic doors are fully extended, the door assembly completes the closure of the material yard entrance. The pneumatic valve is connected to the corresponding telescopic pneumatic cylinder or rotating pneumatic cylinder.

[0006] Preferably, the control buttons are push-button valves, including a first control button, a second control button, a third control button, and a fourth control button. The pneumatic valve includes a first pneumatic valve and a second pneumatic valve. The air inlets of the first, second, third, and fourth control buttons are all connected to a downhole gas source. The air outlets of the first and second control buttons are respectively connected to the control terminals on both sides of the first pneumatic valve. The air inlet of the first pneumatic valve is connected to the downhole gas source. The working air port A of the first pneumatic valve is respectively connected to the rod chamber of two rotary pneumatic cylinders, and the working air port B of the first pneumatic valve is respectively connected to the rodless chamber of two rotary pneumatic cylinders. The air outlets of the third and fourth control buttons are respectively connected to the control terminals on both sides of the second pneumatic valve. The air inlet of the second pneumatic valve is connected to the downhole gas source. The working air port A of the second pneumatic valve is respectively connected to the rod chamber of two telescopic pneumatic cylinders, and the working air port B of the second pneumatic valve is respectively connected to the rodless chamber of two telescopic pneumatic cylinders.

[0007] Preferably, the control button is a two-position two-way valve, and the pneumatic valve is a two-position five-way valve.

[0008] Preferably, the tail of the rotary pneumatic cylinder is rotatably connected to the coal wall via a cylinder mounting seat, and the piston rod of the rotary pneumatic cylinder is rotatably connected to the upper end of the rotary gate; a rotating ring is provided at the front end of the piston rod of the rotary pneumatic cylinder, and a plate-like structure with a column is provided at the upper end of the rotary gate near the coal wall, with the rotating ring rotatably connected to the column.

[0009] Preferably, the telescopic pneumatic cylinder is installed on the mounting bracket on the upper part of the interlayer of the rotating door via a cylinder fixing clip, and the piston rod of the telescopic pneumatic cylinder is fixed to the upper end of the telescopic door on the side away from the coal wall via a cylinder connecting clip.

[0010] Preferably, the upper end of the telescopic gate is provided with a strip-shaped limiting plate, and the lower end of the mounting bracket on the upper part of the revolving door is provided with a limiting groove corresponding to the position of the limiting plate. The limiting plate and the limiting groove match to avoid the telescopic gate from shaking.

[0011] Preferably, the lower end of the telescopic gate is provided with a V-shaped right-angle steel, and the bottom of the revolving gate is rotatably connected to a V-shaped pulley corresponding to the position of the V-shaped right-angle steel. The V-shaped right-angle steel and the V-shaped pulley are matched to prevent the telescopic gate from swaying.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This device can solve the problem of personnel freely entering and exiting the roadway for vehicle transportation, and effectively isolate personnel; through pneumatic control, it can achieve safe isolation between the bottom material yard and the transshipment station, ensuring that personnel cannot enter the roadway at will during vehicle operation, thus ensuring on-site safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0016] Figure 2 This is the front view of this embodiment;

[0017] Figure 3 This is a side view of this embodiment;

[0018] Figure 4 This is a top view of this embodiment;

[0019] Figure 5 This is a control schematic diagram of the telescopic pneumatic cylinder and the rotary pneumatic cylinder in this embodiment;

[0020] Figure 6 This is a schematic diagram of the door assembly in this embodiment being fully open;

[0021] Figure 7 This is a schematic diagram of the door assembly being fully closed in this embodiment;

[0022] Figure 8 This is a schematic diagram of the door assembly in a half-open state according to this embodiment.

[0023] In the diagram: 1-Retractable gate; 2-Revolving gate; 3-Retractable pneumatic cylinder; 4-Rotary pneumatic cylinder; 5-Heavy-duty hinge; 6.1-First control button; 6.2-Second control button; 6.3-Third control button; 6.4-Fourth control button; 7.1-First pneumatic valve; 7.2-Second pneumatic valve; 8-Cylinder mounting base; 9-Cylinder fixing clip; 10-Cylinder connecting clip; 11-Limit plate; 12-Limit groove; 13-V-shaped right angle steel; 14-V-shaped pulley. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0026] This utility model provides an embodiment:

[0027] like Figures 1 to 8As shown, a pneumatically operated retractable rotating safety door for underground coal mines includes a control box and two sets of door assemblies. The control box is located on the coal wall inside the material yard and includes a control button and a pneumatic valve. The control button controls the valve core of the pneumatic valve to switch directions. Both the control button and the pneumatic valve are connected to an underground air source. The two sets of door assemblies are respectively located on the left and right coal walls at the entrance of the material yard. Each door assembly includes a telescopic door 1, a rotating door 2, a telescopic pneumatic cylinder 3, and a rotating pneumatic cylinder 4. The rotating door 2 is rotatably connected to the coal wall via a heavy-duty hinge 5 and is driven by the rotating pneumatic cylinder 4. The telescopic door 1 is slidably connected within the interlayer of the rotating door 2 and is driven by the telescopic pneumatic cylinder 3. When the rotating door 2 rotates to an angle of 90 degrees with the coal wall and both telescopic doors 1 are fully extended, the door assembly completes the closure of the material yard entrance. The pneumatic valve is connected to the corresponding telescopic pneumatic cylinder 3 or rotating pneumatic cylinder 4.

[0028] In this embodiment, the control button is a two-position two-way valve, and the pneumatic valve is a two-position five-way valve. Specifically, the control button is a push-button valve structure, including a first control button 6.1, a second control button 6.2, a third control button 6.3, and a fourth control button 6.4. The pneumatic valve includes a first pneumatic valve 7.1 and a second pneumatic valve 7.2. The air inlet ends of the first control button 6.1, the second control button 6.2, the third control button 6.3, and the fourth control button 6.4 are all connected to a downhole gas source.

[0029] The outlets of the first control button 6.1 and the second control button 6.2 are respectively connected to the control terminals on both sides of the first pneumatic valve 7.1. The inlet of the first pneumatic valve 7.1 is connected to the downhole gas source. The working port A of the first pneumatic valve 7.1 is connected to the rod chamber of the two rotary pneumatic cylinders 4, and the working port B of the first pneumatic valve 7.1 is connected to the rodless chamber of the two rotary pneumatic cylinders 4. The outlets of the third control button 6.3 and the fourth control button 6.4 are respectively connected to the control terminals on both sides of the second pneumatic valve 7.2. The inlet of the second pneumatic valve 7.2 is connected to the downhole gas source. The working port A of the second pneumatic valve 7.2 is connected to the rod chamber of the two telescopic pneumatic cylinders 3, and the working port B of the second pneumatic valve 7.2 is connected to the rodless chamber of the two telescopic pneumatic cylinders 3.

[0030] Working principle:

[0031] When connecting to the underground gas source, and when ordinary vehicles enter or exit:

[0032] The internal air passage of the third control button 6.3 is disconnected from the air source, while the internal air passage of the fourth control button 6.4 is connected to the air source. The valve core of the second pneumatic valve 7.2 is in the right position. High-pressure gas enters the rod chamber of the telescopic pneumatic cylinder 3 through the second pneumatic valve 7.2, controlling the piston rod of the telescopic pneumatic cylinder 3 to retract. In turn, the telescopic pneumatic cylinder 3 drives the telescopic gate 1 to retract, realizing the partial opening of the material yard entrance to meet the entry and exit of ordinary vehicles.

[0033] When oversized vehicles enter or exit:

[0034] The internal air passage of the first control button 6.1 is connected to the air source, while the internal air passage of the second control button 6.2 is disconnected from the air source. The valve core of the first pneumatic valve 7.1 is in the left position. High-pressure gas enters the rodless chamber of the rotary pneumatic cylinder 4 through the first pneumatic valve 7.1, controlling the piston rod of the rotary pneumatic cylinder 4 to extend. In turn, the rotary pneumatic cylinder 4 drives the rotating door to rotate and open, realizing the full opening of the material yard entrance and meeting the needs of extra-wide vehicles to enter and exit.

[0035] After vehicles have finished entering and exiting, the internal air passage of the first control button 6.1 is disconnected from the air source, while the internal air passage of the second control button 6.2 is connected to the air source. The valve core of the first pneumatic valve 7.1 is in the right position, and high-pressure gas enters the rod chamber of the rotary pneumatic cylinder 4 through the first pneumatic valve 7.1, controlling the piston rod of the rotary pneumatic cylinder 4 to retract, thereby causing the rotary pneumatic cylinder 4 to rotate and retract. At the same time, the internal air passage of the third control button 6.3 is connected to the air source, while the internal air passage of the fourth control button 6.4 is disconnected from the air source. The valve core of the second pneumatic valve 7.2 is in the left position, and high-pressure gas enters the rodless chamber of the telescopic pneumatic cylinder 3 through the second pneumatic valve 7.2, controlling the piston rod of the telescopic pneumatic cylinder 3 to extend, thereby causing the telescopic pneumatic cylinder 3 to extend the telescopic gate 1, achieving complete closure of the material yard entrance.

[0036] The tail of the rotary pneumatic cylinder 4 is rotatably connected to the coal wall via the cylinder mounting seat 8, and the piston rod of the rotary pneumatic cylinder 4 is rotatably connected to the upper end of the rotating door 2. A rotating ring is provided at the front end of the piston rod of the rotary pneumatic cylinder 4, and a plate-like structure with a column is provided at the upper end of the rotating door near the coal wall, with the rotating ring rotatably connected to the column. The telescopic pneumatic cylinder 3 is installed on the mounting frame on the upper part of the interlayer of the rotating door 2 via the cylinder fixing clip 9, and the piston rod of the telescopic pneumatic cylinder 3 is fixed to the upper end of the telescopic door on the side away from the coal wall via the cylinder connecting clip 10.

[0037] The upper end of the telescopic gate 1 is provided with a strip-shaped limiting plate 11. The lower end of the mounting bracket on the upper part of the revolving door 2 is provided with a limiting groove 12 corresponding to the position of the limiting plate. The limiting plate 11 and the limiting groove 12 are matched to prevent the telescopic gate 1 from shaking. The lower end of the telescopic gate 1 is provided with a V-shaped right angle steel 13. The bottom of the revolving door 2 is rotatably connected to a V-shaped pulley 14 corresponding to the position of the V-shaped right angle steel 13. The V-shaped right angle steel 13 and the V-shaped pulley 14 are matched to prevent the telescopic gate 1 from shaking.

[0038] This device uses pneumatic control, which is simpler and easier to maintain than electrical control. At the same time, the door assembly adopts a one-way authorized control design, which can only be controlled by personnel inside the material yard. This ensures that when vehicles are running in the material yard, outsiders cannot enter at will, thus effectively playing a safety and security role.

[0039] The door assembly is designed to be adjustable in size. For everyday vehicle access, the retractable gate opens to allow general materials to pass through. For extra-wide items, the entire gate opens to ensure unimpeded passage. After installation, the safety door should replace the personnel currently assigned to guard the area, achieving a reduction in manpower and increased efficiency.

[0040] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A pneumatically operated retractable rotary safety door for use in a coal mine, characterised in that: Includes a control box and two sets of door assemblies; The control box is located on the coal wall inside the material yard. The control box includes control buttons and pneumatic valves. The control buttons are used to control the valve core of the pneumatic valve to switch directions. Both the control buttons and the pneumatic valves are connected to the underground air source. Two sets of door assemblies are respectively set on the left and right coal walls at the entrance of the material yard. The door assembly includes a telescopic door (1), a rotating door (2), a telescopic pneumatic cylinder (3), and a rotating pneumatic cylinder (4). The rotating door (2) is rotatably connected to the coal wall by a heavy-duty hinge (5) and driven by the rotating pneumatic cylinder (4). The telescopic door (1) is slidably connected in the interlayer of the rotating door (2) and driven by the telescopic pneumatic cylinder (3). When the rotating door (2) rotates to an angle of 90 degrees with the coal wall and the two telescopic doors (1) are fully extended, the door assembly completes the closure of the entrance of the material yard. The pneumatic valve is connected to the corresponding telescopic pneumatic cylinder (3) or rotating pneumatic cylinder (4).

2. The pneumatic retractable rotary safety door for underground coal mine of claim 1, wherein: The control buttons are push-button valves, including a first control button (6.1), a second control button (6.2), a third control button (6.3), and a fourth control button (6.4). The pneumatic valves include a first pneumatic valve (7.1) and a second pneumatic valve (7.2). The air inlet ends of the first control button (6.1), the second control button (6.2), the third control button (6.3), and the fourth control button (6.4) are all connected to the downhole gas source. The outlets of the first control button (6.1) and the second control button (6.2) are connected to the control terminals on both sides of the first pneumatic valve (7.1), the inlet of the first pneumatic valve (7.1) is connected to the downhole gas source, the working port A of the first pneumatic valve (7.1) is connected to the rod chamber of the two rotary pneumatic cylinders (4), and the working port B of the first pneumatic valve (7.1) is connected to the rodless chamber of the two rotary pneumatic cylinders (4). The outlets of the third control button (6.3) and the fourth control button (6.4) are connected to the control terminals on both sides of the second pneumatic valve (7.2), the inlet of the second pneumatic valve (7.2) is connected to the downhole gas source, the working port A of the second pneumatic valve (7.2) is connected to the rod chamber of the two telescopic pneumatic cylinders (3), and the working port B of the second pneumatic valve (7.2) is connected to the rodless chamber of the two telescopic pneumatic cylinders (3).

3. The pneumatic retractable rotary safety door for underground coal mine of claim 2, wherein: The control button is a two-position two-way valve, and the pneumatic valve is a two-position five-way valve.

4. The pneumatic retractable rotary safety door for underground coal mine of claim 1, wherein: The tail of the rotary pneumatic cylinder (4) is rotatably connected to the coal wall via the cylinder mounting seat (8), and the piston rod of the rotary pneumatic cylinder (4) is rotatably connected to the upper end of the rotary door (2); a rotating ring is provided at the front end of the piston rod of the rotary pneumatic cylinder (4), and a plate-shaped structure with a column is provided at the upper end of the rotary door near the coal wall, and the rotating ring is rotatably connected to the column.

5. The pneumatic retractable rotary safety door for underground coal mine of claim 1, wherein: The telescopic pneumatic cylinder (3) is installed on the mounting bracket on the upper part of the interlayer of the rotating door (2) by means of the cylinder fixing clip (9). The piston rod of the telescopic pneumatic cylinder (3) is fixed on the upper end of the telescopic door on the side away from the coal wall by means of the cylinder connecting clip (10).

6. The pneumatic retractable rotary safety door for underground coal mine of claim 5, wherein: The upper end of the telescopic gate (1) is provided with a strip-shaped limiting plate (11), and the lower end of the mounting bracket on the upper part of the interlayer of the revolving door (2) is provided with a limiting groove (12) corresponding to the position of the limiting plate. The limiting plate (11) and the limiting groove (12) are matched to avoid the swaying of the telescopic gate (1).

7. The pneumatic retractable rotary safety door for underground coal mine of claim 5, wherein: The lower end of the telescopic gate (1) is provided with a V-shaped right angle steel (13), and the bottom of the revolving gate (2) is rotatably connected with a V-shaped pulley (14) corresponding to the position of the V-shaped right angle steel (13). The V-shaped right angle steel (13) and the V-shaped pulley (14) are matched to avoid the swaying of the telescopic gate (1).

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