A lifting shaft structure

Abstract

The present invention discloses a lifting shaft structure, which is arranged under the ground of an apron and has a plurality of cable connectors for supplying power and air conditioning to aircraft on the apron, comprising a fixed frame and a lifting frame arranged in the shaft, wherein the lifting frame is movably connected to the fixed frame, and the lifting frame is controlled to be lifted relative to the fixed frame by a lifting mechanism arranged in the shaft; a fixed cover plate covering the shaft and fixedly connected to the fixed frame is arranged at the shaft opening, the fixed cover plate is provided with a lifting opening for the lifting frame to pass through, and the lifting frame is provided with a lifting cover plate covering the lifting opening; the lifting frame is provided with a power supply plug connected to a pipeline network arranged in the shaft and an air conditioning pipe, and the power supply plug and the air conditioning pipe move with the lifting frame.

Description

Technical Field

[0001] The invention belongs to the technical field of apron structures, and in particular relates to a lifting shaft structure. Background Art

[0002] The aviation ground well structure is an important facility on the airport apron, mainly used to provide power, air conditioning, communications and other ground support services for parked aircraft. The ground well is usually embedded in the apron ground and aligned with the aircraft parking position so that it can be quickly connected after the aircraft is parked. The main function of the ground well is to provide ground power and air conditioning for the aircraft, ensuring that the aircraft can shut down the engine during parking, reducing fuel consumption and emissions, while providing a comfortable environment for passengers and crew. In addition, the ground well can also provide communication and data connections to support the maintenance and operation needs of the aircraft. The main reason for setting up a ground well on the apron is to improve efficiency and safety. The ground well can be directly embedded in the ground, reducing the space occupied by ground equipment, avoiding frequent movement of vehicles and equipment on the apron, thereby reducing the complexity of apron traffic and potential safety risks. In addition, the use of ground wells can reduce the number of ground equipment and reduce the cost of equipment maintenance and management. Compared with the use of vehicles or ground equipment, ground wells can provide services to aircraft more quickly and stably, especially during peak hours or in severe weather conditions, the advantages of ground wells are more obvious.

[0003] The general structure of the ground well includes a lifting platform, and the platform is equipped with cables, air conditioning pipes, communication lines and other equipment. The lifting platform of the ground well can be raised or lowered from the ground as needed to dock with the aircraft. The ground well is usually equipped with power equipment, air conditioning units, communication interfaces and control systems. The power supply equipment provides power to the aircraft through cables, the air conditioning unit provides cooling or heating to the aircraft through pipes, and the communication interface is used for data transmission and communication connection. The design of the ground well needs to consider requirements such as waterproofing, dustproofing, pressure resistance and corrosion resistance to adapt to the complex environmental conditions of the airport. The existing aviation ground well structure will be equipped with an automatic lifting mechanism, but this mechanism has been found in actual use. Once a fault occurs and it cannot be lifted, it will not only make the apron unusable, but also occupy space if it is in a raised state, affecting the operation of aircraft and other equipment. If the fault is to be eliminated, the process is relatively troublesome and time-consuming, and it may also involve the dismantling and maintenance of the automatic lifting system, which brings great trouble. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a lifting shaft structure with high reliability in manual operation, which can be set at the apron to realize stable equipment lifting, and at the same time realizes better structural optimization and layout on the lifting structure.

[0005] The technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a lift shaft structure, which is arranged under the ground of an apron and has a plurality of cable connectors to supply power and air conditioning to aircraft on the apron.

[0007] It comprises a fixed frame and a lifting frame which are both arranged in the underground well, wherein the lifting frame is movably connected with the fixed frame, and the lifting frame is controlled to rise and fall relative to the fixed frame by a lifting mechanism arranged in the underground well;

[0008] A fixed cover plate covering the underground well and fixedly connected to the fixed frame is provided at the underground well opening, the fixed cover plate is provided with a lifting opening for the lifting frame to pass through, and the lifting frame is provided with a lifting cover plate covering the lifting opening;

[0009] The lifting frame is provided with a power supply plug and an air conditioning pipeline connected to the pipeline network arranged in the underground well, and the power supply plug and the air conditioning pipeline move with the lifting frame.

[0010] In combination with the first aspect, the present invention provides a first implementation manner of the first aspect, wherein a distribution box is provided on the lifting frame, a plurality of cable sockets and knobs are provided on the surface of the distribution box, a control circuit module is provided inside the distribution box, the control circuit module extends into the underground well through a conductive cable passing through the distribution box and is connected to a pipeline network in the underground well for power supply, a drag chain is provided on the fixed frame, and the conductive cable is arranged in the drag chain.

[0011] In combination with the first aspect, the present invention provides a second implementation of the first aspect, wherein a plug bracket is provided on the lifting frame, and a rotating ring rotatably connected to the plug bracket is provided on the plug bracket, the air-conditioning duct passes through the rotating ring and the plug of the air-conditioning duct is limitedly supported by the rotating ring and placed on the plug bracket.

[0012] In combination with the second embodiment of the first aspect, the present invention provides a third embodiment of the first aspect, wherein the lifting frame is further provided with a pipe through-hole at the lower part of the plug bracket, and the air conditioning pipe passes through the pipe through-hole from the underground well and extends to be placed on the plug bracket;

[0013] A plurality of pipeline guides for rolling and limiting the position in accordance with the outer wall of the air-conditioning pipeline are arranged around the pipeline penetration hole.

[0014] In combination with the third embodiment of the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein the portion of the lifting frame located in the underground well after being fully raised is provided with a guide frame corresponding to the pipe perforation, and the guide frame is provided with several groups of bracket guides for rollingly clamping the air-conditioning pipeline.

[0015] In combination with the first aspect, the present invention provides a fifth implementation of the first aspect, wherein a bottom plate is provided at the lower portion of the lifting frame to shield the ground well opening when fully raised, and a pedal lock assembly is provided on the bottom plate, and the lifting frame is detachably fixed to the fixing frame when fully raised by the pedal lock assembly;

[0016] The lifting cover is provided with a zipper which can be detachably fixed when the lifting frame is completely sunk into the ground well, and the zipper has an operable hand-pull end on the surface of the lifting cover.

[0017] In combination with the first aspect, the present invention provides a sixth implementation of the first aspect, wherein the fixed frame includes a base frame and a main frame arranged on the base frame, and the lifting frame is slidably connected to the main frame;

[0018] The main frame is also provided with a counterweight guide rail, through which a counterweight structure is slidably connected, and the counterweight structure is connected to the lifting frame through a pulley assembly arranged on the main frame.

[0019] In combination with the sixth implementation of the first aspect, the present invention provides a seventh implementation of the first aspect, wherein the counterweight structure includes a counterweight frame and a plurality of counterweight blocks arranged in the counterweight frame, and slides clamped on the counterweight rails are arranged on both sides of the counterweight frame;

[0020] The pulley assembly comprises a fixed pulley arranged on the top of the main frame, and a traction rope which moves around the fixed pulley and connects the counterweight frame and the lifting frame.

[0021] In combination with the sixth embodiment of the first aspect, the present invention provides an eighth embodiment of the first aspect, wherein the fixed cover plate is also provided with an inspection port connected to the underground shaft, the inspection port is covered with a rear inspection cover plate, and the inspection port is provided with an escalator extending into the underground shaft and the bottom end of which is fixed to the bottom of the underground shaft.

[0022] In combination with the first embodiment of the first aspect, the present invention provides a ninth embodiment of the first aspect, wherein the outside of the lifting frame has two oppositely arranged operating end surfaces, each operating end surface is provided with a distribution box and a plug bracket, and the conductive cables in the distribution box extend from the inside of the lifting frame to the underground shaft.

[0023] The beneficial effects of the present invention are:

[0024] (1) The present invention optimizes the ground well lifting structure, so that a plug for power supply and air conditioning ducts for heating and cooling are integrated on the lifting frame, so that the aircraft can be refueled after it stops on the apron, which is convenient to operate and highly efficient, and does not require a work vehicle or a bridge structure to provide corresponding functions;

[0025] (2) The present invention optimizes the structure of the lifting frame and the fixed frame inside the well, thereby realizing a purely mechanical auxiliary lifting operation in a non-automatic control mode in a limited well space, thereby reducing the complexity of the entire structure, improving its stability, and avoiding the problem of being unable to lift due to failure of the automatic control equipment and affecting the apron operation;

[0026] (3) The present invention provides a structure in which the maintenance area is parallel to the lifting area, so that it is convenient to go down the well directly on one side of the lifting area to adjust and maintain the entire lifting structure, thereby improving its safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an axonometric diagram of the entire lifting shaft structure in an embodiment of the present invention;

[0028] Figure 2 The present invention Figure 1 A partial enlarged view of the distribution box part;

[0029] Figure 3 The present invention Figure 1 A partial enlarged view of the pipe perforation part B

[0030] Figure 4 The present invention Figure 1 A partial enlarged view of C involving the guide frame portion;

[0031] Figure 5 The present invention Figure 1 A partial enlarged view of D involving the counterweight part.

[0032] In the figure: 1-base frame, 2-main frame, 3-fixed cover, 4-lifting frame, 5-lifting cover, 6-distribution box, 7-drag chain, 8-counterweight frame, 9-dust cover, 10-knob, 11-cable socket, 12-rotating ring, 13-plug bracket, 14-pedal lock assembly, 15-pipe guide wheel, 16-pipe perforation, 17-bracket guide wheel, 18-guide frame, 19-counterweight guide rail, 20-traction rope, 21-counterweight block, 22-zipper. DETAILED DESCRIPTION

[0033] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Embodiment 1:

[0041] The present embodiment discloses a lifting shaft structure, which can be applied in a variety of scenarios, thereby saving the construction and demand of ground equipment. At the same time, it can be hidden below the ground when not in use, without affecting the operation of equipment on the ground.

[0042] The lifting well structure in this embodiment is mainly used in the aviation field, and is set under the ground of the apron to supply power to aircraft entering the apron and supply cold and hot air conditioning airflow. According to the setting requirements, a rectangular well is dug on the ground of the apron and close to the underground pipeline network, and then the lifting well structure in this embodiment is set in the well.

[0043] Specifically, the underground well structure includes a fixed frame arranged in the underground well and a lifting frame 4 movably connected to the fixed frame. The fixed frame is provided with a counterweight structure connected to the lifting frame 4 and realizing lifting assistance. The total weight of the counterweight structure and the lifting frame 4 is similar to or greater than the total weight of the lifting frame 4, and the counterweight structure is also movably connected to the fixed frame. The counterweight structure maintains synchronous reverse movement with the lifting frame 4 to offset the change in gravitational potential energy caused by the rise / descent of the lifting frame 4.

[0044] The lifting frame 4 is provided with a plurality of plugs for power supply, which can correspond to different power supply specifications, and is also provided with air conditioning pipes, and the plugs and air conditioning pipes are connected to the pipeline network provided in the underground well, and the pipeline network is preset with corresponding power supply lines and gas supply lines. In some embodiments, the lifting frame 4 is also provided with a hose for water supply, and water is supplied to the aircraft at the same time.

[0045] The counterweight structure is connected to the lifting frame 4 via a fixed pulley assembly arranged on the lifting frame 4, wherein the height of the fixed frame in the underground well is greater than the height of the lifting frame 4, so that the counterweight structure has sufficient travel to cope with the lifting / lowering of the lifting frame 4.

[0046] Further, refer to Figure 1-Figure 5 , this embodiment provides a specific example of a lifting shaft structure.

[0047] The fixed frame includes a base frame 1 arranged at the bottom of the underground well, and the base frame 1 is a channel steel fixed to the ground in the underground well by bolts. A main frame 2 is arranged on the base frame 1, and the main frame 2 includes two vertical and oppositely arranged channel steel structures, and the main frame 2 is fixedly connected to the base frame 1 by bolts.

[0048] A fixed cover plate 3 is provided on the top of the main frame 2 to completely cover the ground well opening. The fixed cover plate 3 includes a metal frame and a plate body covering the metal frame. The metal frame is fixedly connected to the main frame 2 by bolts or welding, and the edge of the metal frame can be fixed to the hardened wall around the wellhead by bolts, thereby improving its stability.

[0049] The fixed cover plate 3 has a lifting opening for the lifting frame 4 to be lifted up to the ground. The lifting frame 4 in this embodiment is a plate frame structure arranged between two vertical channel steel structures of the main frame 2 and slidably connected to the main frame 2. The lifting frame 4 is provided with a lifting cover plate 5 on the top and a bottom plate on the bottom. Both the lifting cover plate 5 and the bottom plate can cover the lifting opening. When the lifting frame 4 is in the two states of lifting / descending, the lifting opening is covered by the lifting cover plate 5 or the bottom plate respectively.

[0050] The lifting frame 4 has a hollow structure in the middle, and the conductive cables can pass through it conveniently. The lifting frame 4 has two end faces, and two distribution boxes 6 are arranged opposite to each other. Figure 2The surface of each distribution box 6 is provided with a number of knobs 10, buttons and cable sockets 11, and the cable sockets 11 have different specifications and sizes to facilitate the access of external plugs. There is also an area covered by a dust cover 9 on the upper part of the distribution box 6, which is provided with some power plugs, such as a conventional three-pin connector of 220V specification, which is used to temporarily provide power for some electrical appliances. Since a single ground well structure is provided with two sets of distribution boxes 6, with knobs 10 and cable sockets 11 of the same specifications, and arranged in relative directions, they can be used by two adjacently parked aircraft on the apron, or used as a spare group.

[0051] At the bottom of the distribution box 6, a structure for placing air conditioning pipelines is provided, referring to Figure 3 , that is, the plug bracket 13 set on the two end faces of the lift. The plug bracket 13 shown in the figure has a rotating ring 12 that is rotatably connected, and a pipe through hole 16 is set at the position corresponding to the rotating ring 12 on the bottom plate for the air conditioning pipeline to pass through, and the end plug-in structure of the air conditioning pipeline can be limited by the rotating ring 12, so that it can be placed on the rotating ring 12 without external force to achieve limited fixation. When in use, the operator grabs the plug of the air conditioning pipeline from the hollow groove of the plug bracket 13, and then pulls it out for use.

[0052] Further, refer to Figure 3 and 4 Four sets of pipe guide wheels 15 are arranged in the circumferential direction at the pipe perforations 16 on the bottom plate. The spacing between the pipe guide wheels 15 is close to the outer diameter of the air conditioning pipe, so that the air conditioning pipe can roll with the pipe guide wheels 15 when passing through the pipe perforations 16, thereby avoiding damage to the outer wall material of the air conditioning pipe when bending and being stressed. A guide frame 18 is also arranged at the lower part of the bottom plate. Figure 4 It can be seen that the guide frame 18 is an arc-shaped frame structure, and a plurality of groups of bracket guide wheels 17 are provided in the arc extension direction. The bracket guide wheels 17 are arranged in pairs, and the air-conditioning pipes pass through the bracket guide wheels 17. The friction is also reduced by rolling contact to avoid affecting the surface material of the air-conditioning pipeline during the pulling process.

[0053] Reference Figure 4 The pipeline network in the ground well is arranged at the part close to the ground, so in order to correspond to the lifting and lowering of the lifting frame 4, a drag chain 7 is also arranged at the lower part of the bottom plate, and the conductive cables coming out of the distribution box 6 pass through the bottom plate and enter the drag chain 7, and the other end of the drag chain 7 is connected to the upper part of the ground well, so that when the entire lifting frame 4 is lifted, the longer conductive cables can be bound and supported by bending the drag chain 7.

[0054] Further, refer to Figure 2 and Figure 3A zipper 22 is provided on the lifting cover 5. The zipper 22 has an operable handle end on the top surface of the lifting cover 5, and then a movable part is provided on the side of the lifting cover 5 to form a detachable limited locking effect with the fixed cover 3, similar to a door lock structure. The zipper 22 structure can make the lifting cover 5 and the fixed cover 3 form a limited fixed state when the lifting frame 4 is lowered to the lowest part. The user operates the handle end on the top end surface to open it and lift the lifting frame 4 to the ground.

[0055] Similarly, a pedal lock assembly 14 is provided on the bottom plate, which is similar to the zipper 22 and is unlocked by the foot pedal. When the lifting frame 4 is raised to the highest point, the bottom plate and the fixed cover plate 3 are fixed by the pedal lock assembly 14, and the zipper 22 and the pedal lock assembly 14 can share the same lock groove provided on the fixed cover plate 3.

[0056] Further, refer to Figure 4 , the figure shows the relationship between the entire counterweight structure and the fixed frame. The counterweight structure includes two counterweight frames 8 symmetrically arranged corresponding to the main frame 2. The counterweight frame 8 is designed as a concave structure, and its groove corresponds to the vertical channel steel structure of the main frame 2 to achieve embedded sliding contact. A number of counterweight blocks 21 are arranged in the counterweight frame 8, and the corresponding number of counterweight blocks 21 can be set according to actual needs. A slide is provided at the top and bottom of the counterweight frame 8, and a counterweight guide rail 19 is provided on each side of the main frame 2. The slider cooperates with the counterweight guide rail 19 to achieve a limited sliding connection.

[0057] Two sets of hooks are also provided on the upper part of each counterweight frame 8, and the traction rope 20 of the pulley assembly is connected through the hooks. Two sets of fixed pulleys are provided on the inner side of the fixed cover plate 3. The traction rope 20 passes through the fixed pulleys and is connected to the part of the lifting frame 4 that is always in the ground well. When the lifting frame 4 is inside the ground well, the two counterweight structures are in the upper position of the ground well. Once the zipper 22 opens the lifting cover plate 5, the two counterweight structures with a slightly larger mass than the lifting frame 4 will pull the lifting frame 4 upward. After use, a single operator can press down the lifting frame 4 to pull the two counterweight structures upward, thereby assisting the operator to manually operate the lifting frame 4.

[0058] Further, refer to Figure 1 In this embodiment, the other side of the fixed cover plate 3 is also provided with an inspection port connected to the ground well, which is also covered and shielded by a cover plate that can be pulled open. Since the opening size of the ground well itself is the size of the entire fixed cover plate 3, the inspection space left is actually the reserved space formed by the side placement of the main frame 2. The space size can accommodate maintenance personnel to enter through escalators and other means to maintain and disassemble the main frame 2 and its components.

[0059] The pipeline network corresponding to the underground well in this embodiment is a single pipeline structure, the axis direction of which is perpendicular to the main frame 2 and close to the main frame 2. Figure 1 In order to facilitate the setting, the embedded depth is generally not deep, such as Figure 1 The side surface close to the fixed cover plate 3 is connected with the ground well to facilitate the connection between the internal lines and the cables in the guide frame 18 and the drag chain 7.

[0060] In this embodiment, an empty area is reserved at the bottom of the inner side of the main frame 2 for setting a longer air-conditioning duct. The air-conditioning duct is U-shaped and left in the middle of the main frame 2, one end of which is connected to the pipeline network on the upper side of the inner wall of the ground well, and the other end is bent downward and connected to the upper guide frame 18. When the lifting frame 4 rises upward, the air-conditioning duct is lifted along with the lifting frame 4, and the part of the air-conditioning duct placed in the U shape in the empty area is lifted upward. When the user pulls out the air-conditioning duct from the plug bracket 13, the lower part of the U-shaped air-conditioning duct continues to be lifted to ensure that the user can pull out the air-conditioning duct of a suitable length to connect the aircraft or the corridor.

[0061] Furthermore, in order to solve the problem that the ground well cannot be opened due to the compression deformation of the single-side lifting cover plate 5 or other problems, this embodiment provides a solution. A lifting port and an inspection port are provided on the fixed cover plate 3. The size of the ground well inspection port is the same as that of the lifting port. A main frame 2 and a lifting frame 4 are provided in the lifting port. A slide rail is provided in the ground well. The bottom frame 1 is arranged on the slide rail and fixed by bolts.

[0062] A latch mechanism is provided on the main frame 2, and a detachable connection between the lifting frame 4 and the main frame 2 is realized by the latch mechanism. The lifting cover plate 5 is detachably connected to the lifting frame 4 by bolts. Once the fixed cover plate 3 near the lifting port is deformed due to pressure and cannot be opened, the underground shaft can be entered through the inspection port and the conversion work can be carried out. The lifting frame 4 is locked and fixed to the main frame 2 by a latch mechanism, and then the drag chain 7 and the air-conditioning duct are removed and a certain redundant length is pulled out to ensure that the displacement is not hindered, and then the limit between the base frame 1 and the slide rail is unlocked, and the base frame 1 is moved so that the entire lifting frame 4 is moved from the lifting port to the inspection port and then continues to be limited and fixed, and can be temporarily lifted and used through the inspection port until the fixed cover plate 3 is restored after maintenance and replacement.

[0063] The present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A lifting shaft structure, arranged under the apron ground, and having a plurality of cable connectors to supply power and air conditioning to the aircraft on the apron, characterized in that: It comprises a fixed frame and a lifting frame (4) both arranged in an underground well, wherein the lifting frame (4) is movably connected to the fixed frame, and the lifting frame (4) is controlled to rise and fall relative to the fixed frame by a lifting mechanism arranged in the underground well; A fixed cover plate (3) covering the underground well and fixedly connected to the fixed frame is provided at the underground well opening, the fixed cover plate (3) having a lifting opening for the lifting frame (4) to pass through, and the lifting frame (4) having a lifting cover plate (5) covering the lifting opening; The lifting frame (4) is provided with a power supply plug and an air conditioning pipeline connected to a pipeline network arranged in the underground well, and the power supply plug and the air conditioning pipeline move with the lifting frame (4).

2. The lifting shaft structure according to claim 1, characterized in that: The lifting frame (4) is provided with a distribution box (6), the surface of which is provided with a plurality of cable sockets (11) and knobs (10), the distribution box (6) has a control circuit module inside, the control circuit module is connected to the pipeline network in the underground well through a conductive cable passing through the distribution box (6) and extending into the underground well for power supply, and the fixed frame is provided with a drag chain (7), and the conductive cable is arranged in the drag chain.

3. The lifting shaft structure according to claim 1, characterized in that: The lifting frame (4) is provided with a plug bracket (13), and the plug bracket (13) is provided with a rotating ring (12) rotatably connected to the plug bracket (13); the air-conditioning duct passes through the rotating ring (12), and the plug of the air-conditioning duct is limitedly supported by the rotating ring (12) and placed on the plug bracket (13).

4. The lifting shaft structure according to claim 3, characterized in that: The lifting frame (4) is also provided with a pipe through hole (16) at the bottom of the plug bracket (13), and the air conditioning pipe passes through the pipe through hole (16) from the underground well and extends to be placed on the plug bracket (13); The pipeline through hole (16) is provided with a plurality of pipeline guides (15) which are adapted to fit the outer wall of the air-conditioning pipeline and limit rolling.

5. The lifting shaft structure according to claim 4, characterized in that: The part of the lifting frame (4) located in the underground well after being fully lifted is provided with a guide frame (18) corresponding to the pipeline perforation (16), and the guide frame (18) is provided with a plurality of bracket guides (17) for rolling and clamping the air-conditioning pipelines.

6. The lifting shaft structure according to claim 1, characterized in that: The lower part of the lifting frame (4) is provided with a bottom plate for shielding the ground wellhead when fully raised, and a pedal lock assembly (14) is provided on the bottom plate, and the lifting frame (4) is detachably fixed to the fixing frame when fully raised by the pedal lock assembly (14); The lifting cover plate (5) is provided with a zipper (22) which can be detachably fixed when the lifting frame (4) is completely sunk into the ground well, and the zipper (22) has an operable hand-pull end on the surface of the lifting cover plate (5).

7. The lifting shaft structure according to claim 1, characterized in that: The fixed frame comprises a base frame (1) and a main frame (2) arranged on the base frame (1), and the lifting frame (4) is slidably connected to the main frame (2); The main frame (2) is also provided with a counterweight guide rail (19), and a counterweight structure is slidably connected to the counterweight guide rail (19). The counterweight structure is connected to the lifting frame (4) via a pulley assembly provided on the main frame (2).

8. The lifting shaft structure according to claim 7, characterized in that: The counterweight structure comprises a counterweight frame (8) and a plurality of counterweight blocks (21) arranged in the counterweight frame (8); slideways clamped on counterweight rails (19) are arranged on both sides of the counterweight frame (8); the pulley assembly comprises a fixed pulley arranged on the top of the main frame (2), and a traction rope (20) moving around the fixed pulley and connecting the counterweight frame (8) and the lifting frame (4).

9. The lifting shaft structure according to claim 7, characterized in that: The fixed cover plate (3) is also provided with an inspection port connected to the underground well, the inspection port is covered with a rear inspection cover plate, and the inspection port is provided with an escalator extending into the underground well and having its bottom end fixed to the bottom of the underground well.

10. The lifting shaft structure according to claim 2, characterized in that: The lifting frame (4) has two operating end surfaces arranged opposite to each other on the outside, each operating end surface is provided with a distribution box (6) and a plug bracket (13), and the conductive cables in the distribution box (6) extend from the inside of the lifting frame (4) to the underground well.

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