Mine shaft mouth sealing device

Abstract

The utility model relates to the technical field of skip transportation, and concretely relates to a mine shaft mouth sealing device. Including: fixed base airtight buckle is established in the upper portion of mine shaft mouth, and the top is equipped with the rectangular passageway opposite to the skip in the well; Dynamic sealing structure contains the sealing cover plate articulated in one side of rectangular passageway, and the sealing cover plate is equipped with the long strip-shaped guide slot extending along its rotary direction; Drive structure is used to drive the rotation of sealing cover plate to realize the opening or closure of rectangular passageway. Set up the sealing cover plate of open and close, can adapt to the operation tempo of skip hoisting, closes the shaft mouth during non-passing, helps to reduce the water vapor escape, and the cooperation of guide slot and flexible sealing assembly aims at sealing this main leakage point of steel wire rope passageway, reduces the water vapor escape, improves the environmental conditions in well tower, and mechanical drive structure helps to reduce the risk and labor intensity of manual operation.

Description

Technical Field

[0001] This utility model relates to the field of skip transport technology, specifically a mine wellhead sealing device. Background Technology

[0002] In the mining industry, shaft hoisting is a crucial channel for transporting personnel, materials, and ore. As the boundary between the underground and surface environments, the sealing performance of the mine shaft directly affects the operational safety and service life of the equipment inside the shaft. Underground operations generate a large amount of hot and humid air, forming a continuous upward airflow. If the shaft opening is not properly sealed, moisture rich in water and corrosive components will diffuse into the shaft space, potentially causing corrosion of metal structures such as hoisting equipment and electrical control systems, increasing maintenance costs.

[0003] Currently, the main technical challenges in wellhead sealing are concentrated on sealing the wire rope channels. To meet the requirements of skip hoisting operations, wellheads must be equipped with channels for the wire ropes to pass through, and these channels become the main pathways for water vapor diffusion. Traditional sealing structures have significant shortcomings in dealing with wire rope channels: if a fixed sealing structure is used, a large gap must be reserved at the channel to avoid interference with the moving wire rope, resulting in poor sealing performance; if a movable sealing device is used, there are technical challenges such as how to precisely coordinate with the skip's movement and how to achieve effective sealing between moving parts. In addition, existing structures still need improvement in adapting to different skip sizes and coordinating sealing performance with operational reliability. Utility Model Content

[0004] The present invention aims to solve the above-mentioned problems, thereby providing a mine wellhead sealing device that reduces water vapor leakage.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is: A mine shaft sealing device, comprising: The fixed base is sealed and fastened above the mine shaft opening. The top has a rectangular channel opposite to the skip inside the shaft. Several rows of steel wire ropes connected to the top of the skip run through the rectangular channel. The dynamic sealing structure includes a sealing cover plate hinged to one side of a rectangular channel. The sealing cover plate has elongated guide grooves extending in its rotation direction, and the number of guide grooves is relative to the number of rows of steel wire ropes. The drive structure, connected to the sealing cover, is used to drive the sealing cover to rotate in order to open or close the rectangular channel. When the sealing cover is in the closed position, the guide groove is used to avoid the steel wire rope passing through the rectangular channel, and a flexible sealing component is provided in the guide groove to cover the gap between the guide groove and the steel wire rope.

[0006] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: The system features an openable and closable sealing cover that adapts to the operating rhythm of skip hoisting. During non-passage periods, it seals the wellhead, helping to reduce moisture escape. The combination of the guide groove and flexible sealing components aims to seal the wire rope channel, a major leakage point, further reducing moisture escape and improving environmental conditions within the well tower. The mechanical drive structure helps reduce the risks and labor intensity of manual operation. The overall device adopts a prefabricated assembly structure to minimize on-site welding work at the wellhead, avoiding issues at the wellhead.

[0007] As a preferred embodiment, a further technical solution of this utility model is: Furthermore, the flexible seal includes elastic sealing lips fixedly disposed on the inner walls of both sides of the guide groove. The free edges of the elastic sealing lips extend toward the center of the guide groove and approach or contact each other in their natural state, thereby forming a dynamic seal when the wire rope passes through. The purpose is to fill the space between the wire rope and the rigid inner wall of the guide groove by the flexible deformation of the elastic sealing lips after the sealing cover is closed, so as to significantly reduce the leakage gap at this point and thus enhance the blocking effect against water vapor leakage.

[0008] Furthermore, the drive structure is a winch, which is connected to the side of the sealing cover away from the hinge axis by a wire rope. The winch can provide a large traction force, which helps to achieve smooth opening and closing of the cover. Its remote operation characteristics also provide a basis for the system's automated control.

[0009] Furthermore, a sealing strip is provided on the lower surface of the sealing cover. When the sealing cover is in the closed position, the sealing strip adheres to the upper surface of the panel. The sealing strip can form an elastic seal between the cover and the base panel, which is intended to compensate for the unevenness of the contact surface and enhance the sealing ability of the gaps around the cover. Attached Figure Description

[0010] Figure 1 This is a three-dimensional connection structure diagram of the sealing cover and the winch in an embodiment of the present utility model; Figure 2 This is a three-dimensional connection structure diagram of the sealing cover and the winch in an embodiment of the present utility model; Figure 3 This is a top view schematic diagram of the connection relationship between the sealing cover plate and the elastic sealing lip in an embodiment of this utility model; The components are marked as follows: 1. Fixed base; 2. Sealing cover; 3. Guide groove; 4. Elastic sealing lip; 5. Winch. Detailed Implementation

[0011] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0012] A mine shaft sealing device, comprising: The fixed base 1 is sealed and fastened above the mine shaft opening. The top surface of the fixed base 1 contains several steel plates, which are connected by pre-made bolt holes to avoid sparks caused by traditional on-site welding processes at the shaft opening. The top is provided with a rectangular channel opposite to the skip in the shaft. The rectangular channel is determined according to the number of skips on site. In this embodiment, two are provided. Several rows of steel wire ropes connected to the top of the skip pass are passed through the rectangular channel. The dynamic sealing structure includes a sealing cover plate 2 hinged to one side of a rectangular channel. The sealing cover plate 2 has a long strip-shaped guide groove 3 extending along its rotation direction. The number of guide grooves 3 is relative to the number of steel wire rope rows. The number of steel wire rope rows is determined according to the actual site conditions. In this embodiment, three rows are set, located on both sides and the middle of the hopper respectively. The steel wire ropes on both sides are connected to the four corners of the top surface of the hopper. The driving structure, connected to the sealing cover plate 2, is used to drive the sealing cover plate 2 to rotate in order to open or close the rectangular channel; When the sealing cover 2 is in the closed position, the guide groove 3 is used to avoid the steel wire rope passing through the rectangular channel, and a flexible sealing component is provided in the guide groove 3 to cover the gap between the guide groove 3 and the steel wire rope.

[0013] Furthermore, the flexible seal includes elastic sealing lips 4 fixedly disposed on the inner walls of both sides of the guide groove 3. The free edges of the elastic sealing lips 4 extend toward the center of the guide groove 3 and approach or contact each other in their natural state, thereby forming a dynamic seal when the wire rope passes through. The purpose is to fill the space between the wire rope and the inner wall of the rigid guide groove 3 by the flexible deformation of the elastic sealing lips 4 after the sealing cover plate 2 is closed, so as to significantly reduce the leakage gap at this point and thus enhance the blocking effect against water vapor leakage.

[0014] The material for the elastic sealing lip 4 can be a wear-resistant, aging-resistant polymer material with good elasticity, such as polyurethane (PU), nitrile rubber (NBR), or neoprene rubber (CR). Polyurethane has excellent wear resistance and mechanical strength, effectively resisting the slight friction of the wire rope; while nitrile rubber or neoprene rubber has good elasticity and oil resistance, better adapting to the irregular shape of the wire rope surface and resisting potential oil erosion downhole. The specific material selection can be determined through routine testing based on the wear resistance requirements, ambient temperature, and media conditions under actual working conditions.

[0015] It should be noted that the 'sealing' described in this utility model does not refer to an absolute, zero-leakage seal. The core of this utility model lies in providing a static, non-contact, or micro-contact sealing solution. When the sealing cover 2 is in the closed position, the mine is in a relatively static condition of normal ventilation or suspended hoisting operations. At this time, the wire rope may be stationary or moving at a very low speed. The structural design of the elastic sealing lip 4 aims to fill the annular space between the lip and the wire rope as much as possible under the static premise of the cover being closed, forming a physical barrier. Its sealing principle is to minimize the cross-sectional area of ​​the leakage channel and significantly increase the resistance to water vapor passage by utilizing the narrow slit effect, thereby controlling the leakage to a low level and effectively achieving the industrial application purpose of suppressing the continuous outflow of large amounts of water vapor.

[0016] The width design of the guide groove 3 should ensure that the wire rope can pass through without interference, and at the same time, the gap between it and the two sides of the wire rope should be minimized as much as possible. The thickness and width of the elastic sealing lip 4 should ensure that it has sufficient flexibility to fit the wire rope, while also having the necessary structural strength to resist deformation and wear. The specific dimensions can be determined by conventional design based on the diameter of the wire rope, the operating conditions, and the expected sealing effect in the actual application.

[0017] Furthermore, the drive structure is a winch 5, which is located outside the fixed base 1. The winch 5 is connected to the side of the sealing cover plate 2 away from the hinge axis by a wire rope. A vertical pole is provided between the winch 5 and the sealing cover plate 2, and a fixed pulley is provided at the top of the vertical pole. The wire rope on the winch 5 passes around the fixed pulley and is connected to the sealing cover plate 2. The winch 5 can provide a large traction force, which helps to realize the smooth opening and closing of the sealing cover plate 2. Its remote operation characteristics also provide a basis for the system's automated control.

[0018] Furthermore, a sealing strip is provided on the lower surface of the sealing cover plate 2. When the sealing cover plate 2 is in the closed position, the sealing strip is in contact with the upper surface of the panel. The sealing strip can form an elastic seal between the cover plate and the base panel, which is intended to compensate for the unevenness of the contact surface and enhance the sealing ability of the gaps around the cover plate.

[0019] When the skip is at the bottom of the well or has not reached the wellhead during hoisting, the drive structure (such as the winch 5) moves to rotate the sealing cover 2 to the closed position, so that the sealing strip on its lower surface fits tightly against the panel of the fixed base 1, sealing the rectangular channel. At this time, the steel wire rope passing through the channel is accommodated in the guide groove 3 of the sealing cover 2, and the elastic sealing lips 4 fixed on both sides of the inner wall of the guide groove 3 extend towards the center in their natural state and approach or contact each other. By using flexible deformation to fill the annular space between the steel wire rope and the rigid groove wall, the cross-sectional area of ​​the leakage channel is minimized and the flow resistance is increased by using the narrow gap effect, thereby effectively sealing the problem of water vapor escaping due to the reserved gap in the steel wire rope channel pointed out in the background art. When the skip is hoisted to near the wellhead, the drive structure pulls the sealing cover 2 to open in time. After the skip has completely passed, the sealing cover 2 closes again. This dynamic opening and closing method coordinates the sealing requirements and hoisting operation, overcoming the technical problems of poor sealing of traditional fixed structures or poor coordination of opening and closing of moving devices.

[0020] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A mine shaft sealing device, characterized in that: include: The fixed base is sealed and fastened above the mine shaft opening. The top has a rectangular channel opposite to the skip inside the shaft. Several rows of steel wire ropes connected to the top of the skip run through the rectangular channel. The dynamic sealing structure includes a sealing cover plate hinged to one side of a rectangular channel. The sealing cover plate has elongated guide grooves extending in its rotation direction, and the number of guide grooves is relative to the number of rows of steel wire ropes. The drive structure, connected to the sealing cover, is used to drive the sealing cover to rotate in order to open or close the rectangular channel. When the sealing cover is in the closed position, the guide groove is used to avoid the steel wire rope passing through the rectangular channel, and a flexible sealing component is provided in the guide groove to cover the gap between the guide groove and the steel wire rope.

2. The mine shaft sealing device according to claim 1, characterized in that: The flexible seal includes elastic sealing lips that are fixedly disposed on the inner walls of both sides of the guide groove. The free edges of the elastic sealing lips extend toward the center of the guide groove and approach or contact each other in their natural state, thereby forming a dynamic seal when the wire rope passes through.

3. The mine shaft sealing device according to claim 1, characterized in that: The drive structure is a winch, which is connected to the side of the sealing cover away from the hinge point with the rectangular channel via a steel wire rope.

4. The mine shaft sealing device according to claim 1, characterized in that: A sealing strip is provided on the lower surface of the sealing cover. When the sealing cover is in the closed position, the sealing strip is in contact with the upper surface of the fixed base.

Images