Inclined shaft explosion door self-locking device for coal mine ventilation system
By using a combination of magnetic counterweight components and sliding components on the explosion-proof door, the problems of slow opening and difficulty in closing of traditional explosion-proof doors are solved, and more efficient ventilation effect and stability are achieved.
Patent Information
- Application Number
- CN202421122974.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Traditional explosion-proof doors open slowly under the action of friction, which affects ventilation effect, and increasing the weight of the counterweight may lead to the inability to close the wellhead.
A self-locking device including a guide wheel, a traction cable and a counterweight assembly is adopted. The counterweight assembly consists of a magnetic suction part and a counterweight part made of magnetic material. The opening of the door body is accelerated by magnetic adsorption force and is reduced by the cylinder and sliding part. Friction force ensures smooth movement of the door body.
It improves the opening speed and ventilation effect of the explosion-proof door, and at the same time, it can stably close the wellhead under the action of negative pressure, enhancing the performance of the ventilation system.
Smart Images
Figure CN222315185U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of explosion-proof door self-locking devices, and in particular relates to an inclined shaft explosion-proof door self-locking device for a coal mine ventilation system. Background Art
[0002] The explosion-proof door is a special sealed manhole cover installed on the exhaust manhole with the main ventilator. During normal ventilation, it is used to isolate the underground airflow from the ground atmosphere to prevent airflow short circuit and ensure the normal ventilation system. Once a gas or coal dust explosion occurs underground, the explosion-proof door is opened by the impact of the explosion airflow, so that the explosion airflow is directly discharged to the ground atmosphere, which plays a role in pressure relief.
[0003] Most explosion-proof doors have a fan linkage control function, that is, a counterweight is suspended on the explosion-proof door. When the fan is working normally, the explosion-proof door closes the wellhead under the action of the negative pressure in the air duct. If the fan stops, the explosion-proof door is pulled open under the action of the counterweight, and natural ventilation can be carried out in the well through the explosion-proof door.
[0004] The inventors found that traditional explosion-proof doors rely solely on the weight of the counterweight to pull them open. However, under the action of friction, the counterweight pulls the explosion-proof door at a slow speed, which in turn makes the opening speed of the explosion-proof door slower, reducing the ventilation effect. Simply increasing the weight of the counterweight may cause the explosion-proof door to be unable to close the wellhead under the action of negative pressure. Utility Model Content
[0005] The utility model aims to provide a self-locking device for an inclined shaft explosion-proof door used in a coal mine ventilation system, which can increase the opening speed of the explosion-proof door.
[0006] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is: the embodiment of the present application provides a self-locking device for an inclined shaft explosion-proof door for a coal mine ventilation system, which is used for an inclined shaft explosion-proof door, the inclined shaft explosion-proof door includes a main body and a door body, the main body is arranged on the wellhead foundation, the door body is rotatably arranged on the main body, the main body is provided with a driving component, the driving component is used to drive the door body to rotate, and the self-locking device includes a guide wheel, a traction rope and a counterweight assembly. The guide wheel is rotatably connected to the wellhead foundation, one end of the traction rope is connected to the door body, and the other end is suspended, and the traction rope is wound around the guide wheel. The counterweight assembly includes a counterweight part and a magnetic attraction part, the counterweight part is connected to the suspended end of the traction rope, the magnetic attraction part and the counterweight part are arranged at intervals along the axial direction of the traction rope, and the counterweight part includes a magnetic adsorption material.
[0007] In some embodiments, the counterweight assembly further includes a cylinder, and the counterweight portion and the magnetic attraction portion are accommodated in the cylinder.
[0008] In some embodiments, the inner circumferential wall of the cylinder is provided with a sliding portion, and the sliding portion is used to reduce the friction between the counterweight portion and the inner circumferential wall of the cylinder.
[0009] In some embodiments, the sliding portion includes a spherical body, the inner peripheral wall is provided with a receiving cavity, and the spherical body is received in the receiving cavity.
[0010] In some embodiments, the barrel includes a plurality of segments, each segment being detachably connected.
[0011] In some embodiments, the outer peripheral wall of the segment is provided with an expansion portion, and the expansion portions of two adjacent segments are connected by bolts.
[0012] In some embodiments, the counterweight portion is made of magnetic material, and the magnetic attraction portion is configured so that when the counterweight portion is close to the magnetic attraction portion, the magnetic poles of the counterweight portion and the magnetic attraction portion are different, and when the counterweight portion is away from the magnetic attraction portion, the magnetic poles of the counterweight portion and the magnetic attraction portion are the same.
[0013] In some embodiments, the magnetic attraction portion is rotatably connected to the cylinder.
[0014] In some embodiments, the barrel is connected to the body via an adjustment member.
[0015] In some embodiments, the adjusting component includes a rod sleeve, a rod body and a locking piece, the rod sleeve is connected to the main body, the rod body is inserted into the rod sleeve, the cylinder is connected to the rod body, and the locking piece is used to lock the rod body with the rod sleeve.
[0016] The utility model has the following beneficial effects:
[0017] 1. When the underground fan is working normally, under the action of the underground negative pressure, the door body is adsorbed to the wellhead foundation, and the explosion-proof door is in a closed state. When the underground fan is shut down, the adsorption effect on the door body disappears, and under the action of the gravity of the counterweight block, the door body can be pulled open by the traction cable.
[0018] 2. When the counterweight moves toward the magnetic attraction part, the magnetic attraction part can generate a magnetic adsorption force on the counterweight, thereby increasing the moving speed of the counterweight block, thereby increasing the opening speed of the door body and improving the ventilation effect of the explosion-proof door. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of a self-locking device for an inclined shaft explosion-proof door for a coal mine ventilation system of the utility model;
[0020] Figure 2 This is a schematic structural diagram of a self-locking device for an inclined shaft explosion-proof door for a coal mine ventilation system (showing an adjustment component);
[0021] Figure 3 It is a schematic diagram of the internal structure of the cylinder of the utility model.
[0022] Figure numbers: 1-wellhead foundation, 2-door body, 3-main body, 4-driving component, 5-traction rope, 6-guide wheel, 7-counterweight assembly, 8-counterweight part, 9-magnetic part, 10-cylinder body, 11-rod body, 12-rod sleeve, 13-locking piece, 14-segment, 15-sphere, 16-expansion part. DETAILED DESCRIPTION
[0023] 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. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.
[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0025] See also Figure 1 and Figure 2 The embodiment of the present application provides a self-locking device for an inclined shaft explosion-proof door for a coal mine ventilation system, which is used for an inclined shaft explosion-proof door. The inclined shaft explosion-proof door includes a main body 3 and a door body 2. The main body 3 is arranged on a wellhead foundation 1. The door body 2 is rotatably arranged on the main body 3. The main body 3 is provided with a driving component 4. The driving component 4 is used to drive the door body 2 to rotate. The self-locking device includes a guide wheel 6, a traction rope 5 and a counterweight assembly 7. The guide wheel 6 is rotatably connected to the wellhead foundation 1. One end of the traction rope 5 is connected to the door body 2, and the other end is suspended. The traction rope 5 is wound around the guide wheel 6. The counterweight assembly 7 includes a counterweight part 8 and a magnetic attraction part 9. The counterweight part 8 is connected to the suspended end of the traction rope 5. The magnetic attraction part 9 and the counterweight part 8 are arranged at intervals along the axial direction of the traction rope 5. The counterweight part 8 includes a magnetic adsorption material.
[0026] The door body 2 rotates relative to the main body 3, so that the explosion-proof door can open or close the wellhead. The driving component 4 can be selected from existing products, such as a hydraulic cylinder. The structure and setting method of the driving component 4 are well known to those skilled in the art and will not be repeated here.
[0027] The guide wheel 6 is used to support the middle part of the traction rope 5 so that one end of the traction rope 5 can be suspended in the air.
[0028] When the underground fan is working normally, under the action of the underground negative pressure, the door body 2 is adsorbed to the wellhead foundation 1, and the explosion-proof door is in a closed state. When the underground fan is shut down, the adsorption effect on the door body 2 disappears, and under the action of the gravity of the counterweight block, the door body 2 can be pulled open by the traction rope 5.
[0029] The counterweight portion 8 and the magnetic attraction portion 9 may be arranged vertically at intervals, with the counterweight portion 8 being disposed above the magnetic attraction portion 9 .
[0030] The weight portion 8 can be made of a material that is not magnetic, such as metal iron. The weight portion 8 can also be made of a material that is magnetic, such as a permanent magnet.
[0031] When the counterweight part 8 moves toward the magnetic attraction part 9, the magnetic attraction part 9 can generate a magnetic attraction force on the counterweight part 8, thereby increasing the moving speed of the counterweight block, thereby increasing the opening speed of the door body 2 and improving the ventilation effect of the explosion-proof door.
[0032] See also Figure 2 and Figure 3 In some embodiments, the counterweight assembly 7 further includes a cylinder 10 , and the counterweight portion 8 and the magnetic attraction portion 9 are accommodated in the cylinder 10 .
[0033] When the weight portion 8 and the magnetic attraction portion 9 are arranged at intervals in the vertical direction, the axis of the cylinder 10 can extend in the vertical direction.
[0034] The relative positions of the counterweight part 8 and the magnetic part 9 are limited by the cylinder 10, which not only improves the movement stability of the counterweight part 8 and reduces the risk of shaking of the counterweight part 8, but also ensures that the magnetic part 9 can generate an adsorption force on the counterweight part 8 along the axial direction of the cylinder 10.
[0035] See also Figure 3 In some embodiments, the inner circumferential wall of the cylinder 10 is provided with a sliding portion, and the sliding portion is used to reduce the friction between the counterweight portion 8 and the inner circumferential wall of the cylinder 10.
[0036] The sliding part reduces the friction between the counterweight 8 and the inner wall of the cylinder 10, which makes the movement of the counterweight 8 smoother and reduces the risk of the counterweight 8 getting stuck due to excessive friction between the counterweight 8 and the cylinder 10. On the other hand, the wear of the counterweight 8 and the cylinder 10 is reduced.
[0037] See also Figure 3 In some embodiments, the sliding portion includes a sphere 15, the inner peripheral wall is provided with a receiving cavity, and the sphere 15 is received in the receiving cavity.
[0038] The sphere 15 can be partially accommodated in the accommodating cavity and partially disposed in the cylinder 10 , so that the sphere 15 can contact the counterweight 8 .
[0039] Under the action of the accommodating cavity, the ball 15 can rotate in the accommodating cavity, so that when the counterweight part 8 moves, there is rolling friction between the counterweight part 8 and the inner wall of the cylinder 10, thereby achieving the purpose of reducing the friction between the counterweight part 8 and the inner wall of the cylinder 10.
[0040] See also Figure 3 In some embodiments, the barrel 10 includes a plurality of segments 14, and each segment 14 is detachably connected.
[0041] The segments 14 are combined along their axial direction so that the axial length of the cylinder 10 can be adjusted as needed.
[0042] The segments 14 are detachably connected, so that it is easy to disassemble and assemble some of the segments 14.
[0043] See also Figure 3 In some embodiments, the outer peripheral wall of the segment 14 is provided with an expansion portion 16, and the expansion portions 16 of two adjacent segments 14 are connected by bolts.
[0044] The expansion portion 16 may be a flange disposed on the outer peripheral wall of the segment 14 .
[0045] The expansion parts 16 of adjacent segments 14 are connected by bolts. On the one hand, the connection reliability of the adjacent segments 14 is increased. On the other hand, the expansion parts 16 can increase the structural strength of the segments 14 themselves.
[0046] In some embodiments, the counterweight portion 8 is made of magnetic material, and the magnetic attraction portion 9 is configured so that when the counterweight portion 8 is close to the magnetic attraction portion 9, the magnetic poles of the counterweight portion 8 and the magnetic attraction portion 9 are different, and when the counterweight portion 8 is away from the magnetic attraction portion 9, the magnetic poles of the counterweight portion 8 and the magnetic attraction portion 9 are the same.
[0047] When the counterweight 8 is close to the magnetic attraction 9, that is, when the explosion-proof door needs to be opened, the relative magnetic poles of the counterweight 8 and the magnetic attraction 9 are different, and the magnetic attraction 9 can generate a magnetic attraction force on the counterweight 8, thereby increasing the moving speed of the counterweight 8. When the counterweight 8 is away from the magnetic attraction 9, that is, when the explosion-proof door needs to be closed, the door body 2 moves under the action of the driving component 4, and the magnetic poles of the counterweight 8 and the magnetic attraction 9 are the same, and the magnetic attraction 9 can generate a repulsive force on the counterweight 8, and the repulsive force can generate an upward force on the counterweight 8, thereby facilitating the driving component 4 to drive the door body 2 to reset.
[0048] In some embodiments, the magnetic attraction part 9 can be an electromagnetic component, so that the relative magnetic poles of the magnetic attraction part 9 and the counterweight part 8 can be changed. The structure and working principle of the electromagnetic component are well known to those skilled in the art and will not be repeated here.
[0049] In some embodiments, the magnetic attraction portion 9 is rotatably connected to the cylinder 10 .
[0050] The rotation axis of the magnetic attraction portion 9 may be perpendicular to the axial direction of the cylinder 10 .
[0051] The magnetic attraction portion 9 is rotatably connected to the cylinder 10 so that the magnetic poles of the magnetic attraction portion 9 and the counterweight portion 8 relative to each other can be changed.
[0052] See also Figure 2 In some embodiments, the cylinder 10 is connected to the main body 3 via an adjusting component.
[0053] On the one hand, the adjusting component is used to fix the cylinder 10 to the main body 3. On the other hand, the adjusting component can adjust the relative positions of the main body 3 and the cylinder 10, so that the axial direction of the traction rope 5 can be adjusted, and the falling speed of the counterweight part 8 can be adjusted. For example, when the axial direction of the traction rope 5 extends in the vertical direction, the falling speed of the counterweight part 8 is the fastest. When there is an angle between the axial direction of the traction rope 5 and the vertical direction, the traction rope 5 generates a component force on the counterweight part 8 toward the inner wall of the cylinder 10, and the falling speed of the counterweight part 8 is reduced.
[0054] It should be noted that the axial direction of the traction rope 5 refers to the axial direction of the portion of the traction rope 5 between the guide wheel 6 and the counterweight part 8.
[0055] See also Figure 2 In some embodiments, the adjusting component includes a rod sleeve 12, a rod body 11 and a locking piece 13, the rod sleeve 12 is connected to the main body 3, the rod body 11 is inserted into the rod sleeve 12, the cylinder 10 is connected to the rod body 11, and the locking piece 13 is used to lock the rod body 11 with the rod sleeve 12.
[0056] The rod body 11 is inserted into the rod sleeve 12 , so that the rod body 11 can move relative to the rod sleeve 12 , and thus the position of the cylinder body 10 relative to the main body 3 can be adjusted.
[0057] The rod sleeve 12 may extend in a horizontal direction.
[0058] When the rod body 11 moves to a designated position, the rod body 11 can be locked to the rod sleeve 12 by the locking member 13 to fix the cylinder body 10 .
[0059] The locking member 13 can be a bolt or a pin. The rod sleeve 12 is provided with a first through hole. Along the extension direction of the rod body 11, the rod body 11 is correspondingly provided with multiple second through holes. The locking member 13 is inserted into the first through hole and is selectively inserted into the second through hole at the same time, thereby achieving the purpose of locking the rod body 11 to the rod sleeve 12.
[0060] The above embodiments are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made by ordinary technicians in this field to the technical solutions of the present invention should all fall within the protection scope determined by the claims of the present invention.
Claims
1. A self-locking device for an inclined shaft explosion-proof door for a coal mine ventilation system, used for an inclined shaft explosion-proof door, the inclined shaft explosion-proof door comprising a main body (3) and a door body (2), the main body (3) being arranged on a wellhead foundation (1), the door body (2) being rotatably arranged on the main body (3), the main body (3) being provided with a driving component (4), the driving component (4) being used to drive the door body (2) to rotate, characterized in that: The self-locking device comprises: A guide wheel (6) rotatably connected to the wellhead foundation (1); A traction rope (5), one end of which is connected to the door body (2) and the other end of which is suspended in the air, and the traction rope (5) is wound around the guide wheel (6); The counterweight assembly (7) comprises a counterweight part (8) and a magnetic attraction part (9), wherein the counterweight part (8) is connected to the suspended end of the traction rope (5), the magnetic attraction part (9) and the counterweight part (8) are arranged at intervals along the axial direction of the traction rope (5), and the counterweight part (8) comprises a magnetic attraction material.
2. The self-locking device for the inclined shaft explosion-proof door for the coal mine ventilation system according to claim 1 is characterized in that: The counterweight assembly (7) further comprises a cylinder (10), and the counterweight portion (8) and the magnetic attraction portion (9) are accommodated in the cylinder (10).
3. The self-locking device for explosion-proof doors of inclined shafts for coal mine ventilation systems according to claim 2 is characterized in that: The inner peripheral wall of the cylinder (10) is provided with a sliding portion, and the sliding portion is used to reduce the friction between the counterweight portion (8) and the inner peripheral wall of the cylinder (10).
4. The self-locking device for the inclined shaft explosion-proof door for the coal mine ventilation system according to claim 3 is characterized in that: The sliding part comprises a spherical body (15), the inner peripheral wall is provided with a receiving cavity, and the spherical body (15) is received in the receiving cavity.
5. The self-locking device for explosion-proof doors of inclined shafts used in coal mine ventilation systems according to claim 2, characterized in that: The cylinder (10) comprises a plurality of segments (14), and each segment (14) is detachably connected.
6. The self-locking device for explosion-proof doors of inclined shafts used in coal mine ventilation systems according to claim 5, characterized in that: The outer peripheral wall of the segment (14) is provided with an expansion portion (16), and the expansion portions (16) of two adjacent segments (14) are connected by bolts.
7. The self-locking device for explosion-proof doors of inclined shafts for coal mine ventilation systems according to claim 1, characterized in that: The counterweight part (8) is made of magnetic material, and the magnetic attraction part (9) is configured so that when the counterweight part (8) is close to the magnetic attraction part (9), the magnetic poles of the counterweight part (8) and the magnetic attraction part (9) are different, and when the counterweight part (8) is far away from the magnetic attraction part (9), the magnetic poles of the counterweight part (8) and the magnetic attraction part (9) are the same.
8. The self-locking device for explosion-proof doors of inclined shafts used in coal mine ventilation systems according to claim 2, characterized in that: The magnetic attraction portion (9) is rotatably connected to the cylinder (10).
9. The self-locking device for explosion-proof doors of inclined shafts used in coal mine ventilation systems according to claim 2, characterized in that: The cylinder (10) is connected to the main body (3) via an adjusting component.
10. The self-locking device for inclined shaft explosion-proof door for coal mine ventilation system according to claim 9, characterized in that: The adjusting component comprises a rod sleeve (12), a rod body (11) and a locking piece (13); the rod sleeve (12) is connected to the main body (3); the rod body (11) is inserted into the rod sleeve (12); the cylinder (10) is connected to the rod body (11); and the locking piece (13) is used to lock the rod body (11) with the rod sleeve (12).