Lifting ground well structure

Abstract

The utility model discloses a lifting ground well structure, which is arranged under the ground of an airport apron, is provided with a plurality of cable joints for supplying power and air conditioners to an airplane on the airport apron, and comprises a fixed frame and a lifting frame which are arranged in a ground well, and the lifting frame is movably connected with the fixed frame. The lifting frame is controlled to lift relative to the fixed frame through a lifting mechanism arranged in the ground well; a fixed cover plate which covers the ground well and is fixedly connected with the fixed frame is arranged at the ground well opening, a lifting opening for the lifting frame to penetrate out is formed in the fixed cover plate, and a lifting cover plate which covers the lifting opening is arranged on the lifting frame; the lifting frame is provided with a power supply plug connected with a pipeline network arranged in the ground well and an air conditioner pipeline, and the power supply plug and the air conditioner pipeline move along with lifting of the lifting frame.

Description

Technical Field

[0001] This utility model belongs to the field of apron structure technology, specifically relating to a lifting well structure. Background Technology

[0002] Aviation manholes are essential facilities on airport aprons, primarily used to provide power, air conditioning, communications, and other ground support services to parked aircraft. Manholes are typically embedded in the apron floor, aligned with the aircraft's parking position, allowing for quick connection once the aircraft is parked. The main functions of a manhole are to provide ground power and air conditioning, ensuring the aircraft can shut down its engines during parking to reduce fuel consumption and emissions, while providing a comfortable environment for passengers and crew. Additionally, manholes can provide communication and data connectivity to support aircraft maintenance and operational needs. The primary reasons for installing manholes on the apron are to improve efficiency and safety. Manholes can be directly embedded in the ground, reducing the space occupied by ground equipment and avoiding frequent movement of vehicles and equipment on the apron, thus reducing the complexity of apron traffic and potential safety risks. Furthermore, the use of manholes can reduce the number of ground devices, lowering equipment maintenance and management costs. Compared to using vehicles or ground equipment, manholes can provide services to aircraft more quickly and reliably, especially during peak hours or in adverse weather conditions, where their advantages are even more pronounced.

[0003] A typical airport airfield shaft consists of a lifting platform housing cables, air conditioning ducts, communication lines, and other equipment. The lifting platform can be raised or lowered from the ground as needed to dock with the aircraft. The shaft typically contains power supply equipment, air conditioning units, communication interfaces, and control systems. The power supply equipment provides electricity to the aircraft via cables, the air conditioning units provide cooling or heating via ducts, and the communication interfaces are used for data transmission and communication connections. The design of airfield shafts must consider requirements for waterproofing, dustproofing, pressure resistance, and corrosion resistance to adapt to the complex environmental conditions of airports. Existing aviation airfield shaft structures include automatic lifting mechanisms; however, in practical use, it has been found that if these mechanisms malfunction and fail to lift, not only will the apron become unusable, but if raised, they will also occupy space, affecting the operation of aircraft and other equipment. Troubleshooting is relatively complicated and time-consuming, and may involve dismantling and repairing the automated lifting system, which brings considerable inconvenience. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a lifting well structure with high reliability for manual operation, which can be set up on the apron to achieve stable equipment lifting, while achieving better structural optimization and layout in the lifting structure.

[0005] The technical solution adopted in this utility model is as follows:

[0006] Firstly, this utility model provides a lifting shaft structure, installed below the apron floor, and equipped with several cable connectors to supply power and air conditioning to the aircraft on the apron.

[0007] It includes a fixed frame and a lifting frame installed in the well, wherein the lifting frame is movably connected to the fixed frame and the lifting frame is controlled to move up and down relative to the fixed frame by a lifting mechanism installed in the well.

[0008] The wellhead is provided with a fixed cover plate that covers the well and is fixedly connected to the fixed frame. The fixed cover plate has a lifting opening for the lifting frame to pass through. The lifting frame is provided with a lifting cover plate that covers the lifting opening.

[0009] The lifting frame is equipped with a power supply plug and an air conditioning pipe that connect to the pipeline network arranged in the well. The power supply plug and the air conditioning pipe move up and down with the lifting frame.

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

[0011] In conjunction with the first aspect, this utility model provides a second embodiment of the first aspect, wherein the lifting frame is provided with a plug bracket, the plug bracket is provided with a rotating ring rotatably connected to the plug bracket, the air conditioning pipe passes through the rotating ring, and the plug of the air conditioning pipe is limited and supported by the rotating ring and placed on the plug bracket.

[0012] In conjunction with the second embodiment of the first aspect, this utility model 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 well and extends to the plug bracket for placement.

[0013] The perforated pipe is provided with several pipe guides that fit the outer wall of the air conditioning pipe and are designed to limit rolling movement.

[0014] In conjunction with the third embodiment of the first aspect, this utility model provides a fourth embodiment of the first aspect, wherein the portion of the lifting frame that is inside the well after it is fully raised is provided with a guide frame corresponding to the pipe perforation, and the guide frame is provided with several sets of brackets that rotate and clamp the air conditioning pipeline.

[0015] In conjunction with the first aspect, this utility model provides a fifth embodiment of the first aspect, wherein the lower part of the lifting frame is provided with a base plate that covers the well opening when fully raised, and a foot lock assembly is provided on the base plate, thereby realizing the detachable fixation between the lifting frame and the fixed frame when fully raised through the foot lock assembly;

[0016] The lifting cover plate is equipped with a detachable and fixed zipper that allows the lifting frame to be completely submerged in the well. The zipper has an operable pull end on the surface of the lifting cover plate.

[0017] In conjunction with the first aspect, this utility model provides a sixth embodiment of the first aspect, wherein the fixing frame includes a base frame and a main frame disposed on the base frame, and the lifting frame is slidably connected to the main frame;

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

[0019] In conjunction with the sixth embodiment of the first aspect, this utility model provides a seventh embodiment of the first aspect, wherein the counterweight structure includes a counterweight frame and a plurality of counterweight blocks disposed within the counterweight frame, and the counterweight frame is provided with slides clamped on the counterweight rail on both sides.

[0020] The pulley assembly includes a fixed pulley located at the top of the main frame, and a traction rope that moves around the fixed pulley and connects the counterweight frame and the lifting frame.

[0021] In conjunction with the sixth embodiment of the first aspect, this utility model provides an eighth embodiment of the first aspect, wherein the fixed cover plate is further provided with an inspection port communicating with the well, the inspection port is covered with a rear inspection cover plate, and a ladder extending into the well and fixed at its bottom end to the bottom of the well is provided inside the inspection port.

[0022] In conjunction with the first embodiment of the first aspect, this utility model provides a ninth embodiment of the first aspect, wherein the lifting frame has two operating end faces arranged opposite to each other, and each operating end face is provided with a power distribution box and a plug bracket, and the conductive cable in the power distribution box extends from the inside of the lifting frame to the ground well.

[0023] The beneficial effects of this utility model are as follows:

[0024] (1) This utility model optimizes the ground well lifting structure, thereby integrating a plug for power supply and an air conditioning pipe for heating and cooling on the lifting frame, so that the aircraft can be resupplied after it is parked on the apron. It is convenient to operate and highly efficient, and does not require the corresponding functions to be provided by work vehicles or boarding bridge structures.

[0025] (2) This utility model optimizes the structure of the lifting frame and the fixed frame inside the well, thereby realizing a purely mechanical auxiliary lifting operation in a limited well space without automatic control, thereby reducing the complexity of the whole structure, improving its stability, and avoiding the problem of the inability to lift due to failure of automatic control equipment, which affects the operation of the apron.

[0026] (3) This utility model has a structure in which the maintenance area and the lifting area are parallel, so that it is convenient to go down into the well directly on one side of the lifting area to adjust and maintain the entire lifting structure, thereby improving its safety. Attached Figure Description

[0027] Figure 1 This is an isometric view of the entire lifting well structure in this embodiment of the utility model;

[0028] Figure 2 This is a utility model Figure 1 A partial enlarged view of section A involving the distribution box;

[0029] Figure 3 This is a utility model Figure 1 Enlarged view of section B involving pipe perforation

[0030] Figure 4 This is a utility model Figure 1 A magnified view of section C, which involves the guide frame;

[0031] Figure 5 This is a utility model Figure 1 A magnified view of part D involving the counterweight.

[0032] In the diagram: 1-Base frame, 2-Main frame, 3-Fixed cover plate, 4-Lifting frame, 5-Lifting cover plate, 6-Distribution box, 7-Drag chain, 8-Counterweight frame, 9-Dust cover, 10-Knob, 11-Cable socket, 12-Rotating ring, 13-Plug bracket, 14-Step 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-Pull lock. Detailed Implementation

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

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0039] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] Example 1:

[0041] This embodiment discloses a lifting manhole structure that can be applied in various scenarios, thereby saving on the construction and requirements of ground equipment, and can be hidden underground when not in use, without affecting the operation of equipment on the ground.

[0042] The lift-up shaft structure in this embodiment is mainly used in the aviation field. It is installed below the apron floor to supply power and air conditioning to aircraft entering the apron. According to the installation requirements, a cuboid shaft is excavated on the apron floor near the underground pipeline network, and then the lift-up shaft structure of this embodiment is installed inside the shaft.

[0043] Specifically, the well structure includes a fixed frame installed inside the well and a lifting frame 4 movably connected to the fixed frame. The fixed frame is equipped with a counterweight structure that is connected to the lifting frame 4 and provides lifting assistance. The total weight of the counterweight structure 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 and the lifting frame 4 move synchronously in opposite directions to counteract the gravitational potential energy change caused by the rise / fall of the lifting frame 4.

[0044] The landing gear 4 is equipped with several power supply plugs to accommodate different power supply specifications. It also includes air conditioning ducts, which connect to a pipeline network within the well. This pipeline network contains pre-installed power and gas supply lines. In some embodiments, the landing gear 4 is also equipped with a flexible hose for water supply to the aircraft.

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

[0046] Furthermore, referring to Figures 1-5 This embodiment provides a specific example of a rising manhole structure.

[0047] The fixing frame includes a base frame 1 installed at the bottom of the well. The base frame 1 is a channel steel and is fixed to the ground inside the well with bolts. A main frame 2 is provided on the base frame 1. The main frame 2 consists of two vertical and oppositely arranged channel steel structures. The main frame 2 is fixedly connected to the base frame 1 with bolts.

[0048] A fixed cover plate 3 is provided on the top of the main frame 2 to completely cover the well opening. The fixed cover plate 3 includes a metal frame and a plate 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 well opening by bolts, thereby improving its stability.

[0049] The fixed cover plate 3 has a lifting opening for the lifting frame 4 to be raised to the ground. In this embodiment, the lifting frame 4 is a plate frame structure set between the 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 at the top and a bottom plate at 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 raising / lowering, 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, allowing conductive cables to pass through easily. The lifting frame 4 has two end faces, each with two opposite electrical distribution boxes 6, as shown in the reference diagram. Figure 2 Each distribution box 6 has several knobs 10, buttons, and cable sockets 11 on its surface. The cable sockets 11 have different sizes to facilitate the connection of external plugs. The upper part of the distribution box 6 also has an area covered by a dust cover 9, which contains some power plugs, such as standard 220V three-prong connectors, for temporarily providing power to some electrical appliances. Since a single well structure has two distribution boxes 6 with identical knobs 10 and cable sockets 11, and are arranged facing each other, they can be used by two adjacent aircraft parked on the apron, or used as a backup.

[0051] At the bottom of distribution box 6, there is a structure for housing air conditioning pipes, see reference. Figure 3 This refers to the plug brackets 13 installed on both ends of the elevator. The plug brackets 13 shown in the figure have a rotating ring 12 for rotatable connection. A pipe through hole 16 is provided on the base plate corresponding to the rotating ring 12, allowing the air conditioning pipe to pass through. The end of the air conditioning pipe is plugged in and positioned by the rotating ring 12, thus securing it in place without external force. In use, the operator grasps the plug of the air conditioning pipe through the hollowed-out groove of the plug bracket 13 and pulls it out for use.

[0052] Furthermore, referring to Figure 3 and 4 Four sets of pipe guide rollers 15 are provided circumferentially at the pipe perforation 16 on the base plate. The spacing of the pipe guide rollers 15 is close to the outer diameter of the air conditioning pipe, so that the air conditioning pipe can roll and contact the pipe guide rollers 15 when passing through the pipe perforation 16, thereby avoiding damage to the outer wall material of the air conditioning pipe when bending under stress. A guide bracket 18 is also provided at the lower part of the base plate. Figure 4 As can be seen, the guide frame 18 has an arc-shaped frame structure, and several sets of bracket guide wheels 17 are provided in its arc-shaped extension direction. The bracket guide wheels 17 are arranged in pairs. The air conditioning pipe passes through the bracket guide wheels 17. Similarly, the friction is reduced by rolling contact, so as to avoid affecting the surface material of the air conditioning pipe during the pulling process.

[0053] Reference Figure 4 The pipeline network in the well is located near the ground. Therefore, in order to correspond to the lifting of the lifting frame 4, a drag chain 7 is also provided under the base plate. The conductive cable that passes through the distribution box 6 enters the drag chain 7 after passing through the base plate. The other end of the drag chain 7 is connected to the upper part of the well, so that the long conductive cable can be bound and supported by the bending of the drag chain 7 when the entire lifting frame 4 is raised.

[0054] Furthermore, referring to Figure 2 and Figure 3 A zipper 22 is provided on the lifting cover plate 5. The zipper 22 has an operable handle end on the top surface of the lifting cover plate 5, and a movable part on the side of the lifting cover plate 5 that forms a detachable locking effect with the fixed cover plate 3, similar to a door lock structure. The zipper 22 structure can limit and fix the lifting cover plate 5 to the fixed cover plate 3 when the lifting frame 4 is lowered to the lowest position. The user can open it by operating the handle end on its top surface, thereby raising the lifting frame 4 to the ground.

[0055] Similarly, a foot lock assembly 14 is provided on the base plate, which, similar to the zipper 22, unlocks by stepping on it. When the lifting frame 4 is raised to its highest position, the foot lock assembly 14 forms a limiting and fixed state between the base plate and the fixed cover plate 3. The zipper 22 and the foot lock assembly 14 can share the same locking groove provided on the fixed cover plate 3.

[0056] Furthermore, referring to Figure 4 The diagram illustrates the relationship between the entire counterweight structure and the fixing frame. The counterweight structure includes two counterweight frames 8 symmetrically arranged corresponding to the main frame 2. Each counterweight frame 8 has a U-shaped design, with its recessed portion corresponding to the vertical channel steel structure of the main frame 2, achieving embedded sliding contact. Several counterweight blocks 21 are provided within each counterweight frame 8, and the number of counterweight blocks 21 can be set according to actual needs. A sliding platform is provided at the top and bottom of each counterweight frame 8, while 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, which are connected to the traction rope 20 of the pulley assembly. Two sets of fixed pulleys are provided on the inner side of the fixed cover plate 3. The traction rope 20 passes around the fixed pulleys and is connected to the part of the lifting frame 4 that is always inside the well. When the lifting frame 4 is inside the well, the two counterweight structures are in the upper position of the well. Once the pull lock 22 opens the lifting cover plate 5, the two counterweight structures, which are slightly larger than the lifting frame 4, will pull the lifting frame 4 upward. After use, a single operator can press down on the lifting frame 4 to pull the two counterweight structures upward, thereby assisting the operator in manually operating the lifting of the lifting frame 4.

[0058] Furthermore, referring to Figure 1 In this embodiment, the other side of the fixed cover plate 3 is also provided with an inspection port that connects to the well. The inspection port is also covered and shielded by a pull-open cover plate. Since the opening size of the well itself is the size of the entire fixed cover plate 3, the reserved maintenance space is actually the reserved space formed by the side placement of the main frame 2. This space is large enough to accommodate maintenance personnel to enter via ladders or other means and perform maintenance and disassembly on the main frame 2 and its components.

[0059] In this embodiment, the pipeline network corresponding to the well is a single-pipe structure, whose axis is perpendicular to the main frame 2 and close to... Figure 1 It is placed horizontally on the lower right side. And for ease of installation, the pre-embedded depth is generally not deep, such as... Figure 1 The side near the fixed cover plate 3 forms a connection with the well, facilitating the connection of internal wiring with cables in the guide frame 18 and drag chain 7.

[0060] In this embodiment, a vacant area is reserved at the bottom inner side of the main frame 2 for installing a longer air conditioning duct. The air conditioning duct is U-shaped and positioned in the middle of the main frame 2, with one end connected to the pipeline network located on the upper side of the inner wall of the well, and the other end bent downwards and connected to the upper guide frame 18. When the lifting frame 4 rises, the air conditioning duct is raised along with the lifting frame 4, lifting the portion of the U-shaped air conditioning duct in the vacant area upwards. When the user pulls out the air conditioning duct from the plug bracket 13, the lower portion of the U-shaped air conditioning duct continues to rise to ensure that the user can pull out an air conditioning duct of a suitable length to connect to the aircraft or the boarding bridge.

[0061] Furthermore, in order to solve the problem that the well cannot be opened due to the deformation of the lifting cover plate 5 under pressure or other issues, this embodiment provides a solution. The fixed cover plate 3 is provided with a lifting port and an inspection port. The size of the well inspection port is the same as the size of the lifting port. The lifting port is provided with a main frame 2 and a lifting frame 4. A slide rail is provided in the well. The base frame 1 is set on the slide rail and fixed by bolts.

[0062] The main frame 2 is equipped with a pin mechanism, which enables a detachable connection between the lifting frame 4 and the main frame 2. The lifting cover plate 5 is detachably connected to the lifting frame 4 by bolts. If the fixed cover plate 3 near the lifting port becomes deformed under pressure and cannot be opened, the manhole can be accessed through the maintenance port for conversion work. The lifting frame 4 is locked and fixed to the main frame 2 by the pin mechanism. Then, the drag chain 7 and air conditioning pipe are disassembled and pulled out to a certain redundant length to ensure that the displacement is not obstructed. 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 maintenance port and then fixed in the limit position. Temporary lifting and lowering can be carried out through the maintenance port until the fixed cover plate 3 is maintained and replaced.

[0063] This utility model is not limited to the optional embodiments described above, and anyone can derive other various forms of products under the guidance of this utility model. The specific embodiments described above should not be construed as limiting the scope of protection of this utility model. The scope of protection of this utility model shall be determined by the claims, and the description can be used to interpret the claims.

Claims

1. A lift shaft structure, installed below the apron floor, and having several cable connectors to supply power and air conditioning to aircraft on the apron, characterized in that: It includes a fixed frame and a lifting frame (4) installed in the well. The lifting frame (4) is movably connected to the fixed frame and the lifting frame (4) is controlled to move up and down relative to the fixed frame by a lifting mechanism installed in the well. A fixed cover plate (3) is provided at the wellhead to cover the well and is fixedly connected to the fixed frame. The fixed cover plate (3) has a lifting opening for the lifting frame (4) to pass through. The lifting frame (4) is provided with a lifting cover plate (5) to cover the lifting opening. The lifting frame (4) is equipped with a power supply plug and an air conditioning pipe that connect to the pipeline network arranged in the well. The power supply plug and the air conditioning pipe move up and down with the lifting frame (4).

2. The lifting shaft structure according to claim 1, characterized in that: The lifting frame (4) is equipped with a power distribution box (6). The power distribution box (6) has several cable sockets (11) and knobs (10) on its surface. The power distribution box (6) has a control circuit module inside. The control circuit module extends into the well through a conductive cable that passes through the power distribution box (6) and is connected to the pipeline network in the well for power supply. The fixed frame is equipped with a drag chain (7), and the conductive cable is installed in the drag chain.

3. A lift shaft structure according to claim 1, wherein: 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 pipe passes through the rotating ring (12), and the plug of the air conditioning pipe is limited and 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 provided with a pipe through hole (16) at the lower part of the plug bracket (13). The air conditioning pipe passes through the pipe through hole (16) from the ground well and extends to the plug bracket (13) for placement. The pipe perforation (16) is provided with several pipe guides (15) that fit the outer wall of the air conditioning pipe and are rolled and limited in the circumferential direction.

5. A lift shaft structure according to claim 4, wherein: The lifting frame (4) is provided with a guide frame (18) with corresponding pipe perforations (16) in the part inside the well after it is fully raised. The guide frame (18) is provided with several sets of bracket guides (17) that roll and clamp the air conditioning pipeline.

6. A lift shaft structure according to claim 1, wherein: The lower part of the lifting frame (4) is provided with a base plate that covers the well opening when fully raised. A foot lock assembly (14) is provided on the base plate. The foot lock assembly (14) enables the lifting frame (4) to be detachably fixed to the fixed frame when fully raised. The lifting cover plate (5) is provided with a detachable zipper (22) that can be fixed when the lifting frame (4) is completely submerged in the well. The zipper (22) has an operable pull end on the surface of the lifting cover plate (5).

7. A lift shaft structure according to claim 1, wherein: The fixed frame includes a base frame (1) and a main frame (2) set 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 through the counterweight guide rail (19). The counterweight structure is connected to the lifting frame (4) through a pulley assembly set on the main frame (2).

8. A lifting shaft structure according to claim 7, characterized in that: The counterweight structure includes a counterweight frame (8) and several counterweight blocks (21) disposed in the counterweight frame (8). The counterweight frame (8) has slides on both sides clamped on the counterweight rail (19). The pulley assembly includes a fixed pulley disposed on the top of the main frame (2) and a traction rope (20) that moves around the fixed pulley and connects the counterweight frame (8) and the lifting frame (4).

9. A lift shaft structure according to claim 7, wherein: The fixed cover plate (3) is also provided with an inspection port that connects to the well. The inspection port is covered with a rear inspection cover plate. The inspection port is provided with a ladder that extends into the well and is fixed at the bottom of the well.

10. A lift shaft structure according to claim 2, wherein: The lifting frame (4) has two opposite operating end faces on the outside. Each operating end face is provided with a power distribution box (6) and a plug bracket (13). The conductive cable in the power distribution box (6) extends from the inside of the lifting frame (4) to the well.

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