Open-close rail device and train maintenance platform

Abstract

The present application belongs to the technical field of train maintenance, and discloses an open-close type track device and a train maintenance platform. The open-close type track device comprises a first track beam and a second track beam. The first track beam and the second track beam are movably arranged on a support beam frame along the width direction thereof, so that the first track beam and the second track beam can be switched between an open state and a closed state. In the closed state, the bogie of the train is movably suspended on the first track beam and the second track beam. In the open state, the bogie of the train can be transferred out through the gap between the first track beam and the second track beam under the driving of hoisting equipment. The open-close type track device can separate the bogie from the track beam and transfer the bogie to a designated position under the driving of the hoisting equipment by switching between the open state and the closed state, so that the bogie does not need to be manually pushed to a designated maintenance position, thereby improving the operation efficiency and reducing the safety hazards.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of train maintenance, and in particular to an open-close type track device and a train maintenance platform. BACKGROUND

[0002] The track of the suspended monorail train is above the train, and the train is suspended on the track beam to run. The suspended monorail train develops to the upper space, has a smaller land occupation, and can solve the problem of urban road congestion.

[0003] The bogie and important equipment of the suspended monorail train are arranged at the roof position, and daily maintenance and replacement of the bogie and other equipment are carried out at the roof position. At present, the major repair operation (replacement of the bogie, maintenance of the roof equipment, etc.) of the suspended monorail train is mainly that the maintenance personnel climb to the roof, disassemble the bogie from the train body, and then move the disassembled bogie along the track beam to the corresponding position for major repair or assembly operation by manpower. The disassembly and repair operation of the bogie by manpower usually needs 3-4 maintenance personnel to complete, which has a large labor intensity, a long time consumption, a low operation efficiency, and a certain safety hazard when the bogie is moved by manpower. SUMMARY

[0004] The present application aims to provide an open-close type track device and a train maintenance platform, which can improve the operation efficiency and reduce the safety hazard without moving the bogie to the designated maintenance position by manpower.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, an open-close type track device is provided, comprising a first track beam and a second track beam;

[0007] The first track beam and the second track beam are both configured to be movably arranged on a support beam frame along the width direction thereof, so that the first track beam and the second track beam can be switched between an open state and a closed state;

[0008] In the closed state, the bogie of the train is movably suspended on the first track beam and the second track beam;

[0009] In the open state, the bogie of the train can be transferred out through the gap between the first track beam and the second track beam under the driving of a hoisting device.

[0010] As a preferred scheme of the open-close type track device provided by the present application, a driving device for driving the first track beam and the second track beam to move relative to the support beam frame is further included, and the driving device comprises:

[0011] A rotating driving member is arranged on the support beam frame;

[0012] A synchronous belt mechanism comprises a driving pulley, a driven pulley and a synchronous transmission belt, the driving pulley is coaxially connected to the output end of the rotating driving member, the driven pulley is rotatably arranged on the support beam frame, and the synchronous transmission belt is sleeved on the driving pulley and the driven pulley and connected with the first track beam or the second track beam.

[0013] As a preferred scheme of the open-close track device provided by the application, the first track beam and the second track beam each comprise a beam body and a sliding frame, the sliding frame is arranged at the bottom of the beam body, and the sliding frame is fixedly connected with one side of the synchronous transmission belt.

[0014] As a preferred scheme of the open-close track device provided by the application, a guide rail is arranged on the support beam frame along the conveying direction of the synchronous transmission belt, rollers are arranged on the sliding frame on the upper and lower sides of the guide rail, and the rollers rollingly cooperate with the guide rail.

[0015] As a preferred scheme of the open-close track device provided by the application, an elastic assembly is further included, the beam body is connected to the sliding frame through the elastic assembly, the beam body compresses the elastic assembly and falls on the support beam frame when the beam body is loaded, and the beam body can be separated from the support beam frame under the rebounding force of the elastic assembly when the beam body is unloaded.

[0016] As a preferred scheme of the open-close track device provided by the application, the elastic assembly comprises:

[0017] A sliding sleeve is mounted on the sliding frame;

[0018] A compression spring is arranged in the sliding sleeve, and the upper end of the compression spring abuts against the beam body;

[0019] A guide bolt is fixedly connected with the beam body, the guide bolt movably penetrates the compression spring and the bottom wall of the sliding sleeve along the axial direction of the guide bolt, a limiting nut is sleeved on the guide bolt, and the limiting nut can abut against the bottom wall of the sliding sleeve to limit the upward movement distance of the beam body when the beam body is switched from the loaded state to the unloaded state.

[0020] As a preferred scheme of the open-close track device provided by the application, a locking unit is further included, the first track beam and the second track beam are locked on the support beam frame through the locking unit in the closed state, and the locking unit comprises:

[0021] A linear driving member is arranged on the support beam frame;

[0022] A latch is arranged at the output end of the linear driving member and is detachably inserted into the first track beam or the second track beam.

[0023] As a preferred scheme of the open-close track device provided by the application, the locking unit further comprises a guide sleeve and a positioning sleeve, the guide sleeve is arranged on the support beam frame, the positioning sleeve is arranged on the first track beam and the second track beam, and the latch is movably inserted into the guide sleeve along the axial direction of the latch and is detachably inserted into the positioning sleeve.

[0024] As a preferred scheme of the open-close track device provided by the application, the open-close track device further comprises a pressure sensor, which is used to detect whether there is a load on the first track beam and the second track beam.

[0025] In a second aspect, a train maintenance platform is provided, which comprises a plurality of support beam frames arranged at intervals along the direction in which a train travels, and an open-close track device as described above is arranged between any two adjacent support beam frames.

[0026] The application has the following beneficial effects:

[0027] The application provides an open-close track device and a train maintenance platform. In the open-close track device, the first track beam and the second track beam are initially in a closed state. When a train needs to be overhauled, the train enters the train maintenance platform along a normal track beam, the bogie of the train is suspended on the first track beam and the second track beam in the closed state, and the train travels along the first track beam and the second track beam to a designated maintenance position and stops. After the train stops, an AGV trolley carrying a car body support frame tool moves in a designated direction, enters the lower part of the train, and adjusts the pose. After accurate alignment with the lifting point of the train body frame, the AGV trolley lifts upward to slightly lift the whole train. Then, an operator disassembles the connection between the bogie and the train body, and a hoisting device hoists the bogie to release the load applied by the bogie on the first track beam and the second track beam. Then, the first track beam and the second track beam move away from each other to switch to an open state. The hoisting device lifts the bogie, moves the bogie out of the maintenance platform through the gap between the first track beam and the second track beam, and then hoists a new fault-free bogie to the upper part of the train. Then, the operator installs the new bogie on the top of the train. After the bogie is installed, the first track beam and the second track beam are closed. The open-close track device switches between the open state and the closed state, so that the bogie can be separated from the track beam and can be transferred to a designated position under the action of the hoisting device. The bogie does not need to be manually pushed to the designated maintenance position, which improves the work efficiency and reduces the safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is an axonometric view of the train maintenance platform provided by the embodiment of the application;

[0029] Figure 2 is a top view of the train maintenance platform provided by the embodiment of the present application;

[0030] Figure 3 is a partial schematic view of the train maintenance platform provided by the embodiment of the present application;

[0031] Figure 4 is a structural schematic view of the open-close track device provided by the embodiment of the present application;

[0032] Figure 5 is a partial enlarged view of A in FIG. 1; Figure 4

[0033] Figure 6 is a partial enlarged view of B in FIG. 1; Figure 4

[0034] Figure 7 is a schematic view of the cooperation between the roller and the guide rail provided by the embodiment of the present application;

[0035] Figure 8 is a partial enlarged view of C in FIG. 1. Figure 7

[0036] in the figure:

[0037] 1, first track beam; 2, second track beam; 3, driving device; 4, guide rail; 5, elastic assembly; 7, locking unit; 8, pressure sensor; 9, position sensor;

[0038] 11, beam body; 12, sliding frame; 111, second contact surface; 121, roller;

[0039] 31, rotary driving member; 32, synchronous belt mechanism;

[0040] 321, driving pulley; 322, synchronous transmission belt;

[0041] 51, sliding sleeve; 52, guide bolt; 53, limiting nut;

[0042] 71, linear driving member; 72, latch; 73, guide sleeve; 74, positioning sleeve;

[0043] 100, support beam frame; 101, first contact surface; 200, work platform. DETAILED DESCRIPTION

[0044] The present application will be further described below in conjunction with the accompanying drawings and examples. It can be understood that the specific examples described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.​​​

[0045] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, "on" or "under" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0048] As shown in Figure 1 and Figure 2 The present embodiment provides a train maintenance platform, which can drive into the maintenance platform along the track beam of normal driving and stop at the designated maintenance position. The train maintenance platform comprises a plurality of support beam frames 100 arranged at intervals along the direction of train travel, and an opening and closing type track device is arranged between adjacent two support beam frames 100. After the train enters the maintenance platform, it walks forward on the opening and closing type track device.

[0049] As shown in Figure 3 The support beam frame 100 serves as the support base of the opening and closing type track device, and its lower end is supported on the foundation platform to provide sufficient support force for the entire maintenance platform.

[0050] As shown in Figure 4As shown, a structure schematic diagram of the open-close track device provided in the embodiment is shown, and the open-close track device comprises a first track beam 1 and a second track beam 2. The first track beam 1 and the second track beam 2 are both configured to be movably arranged on the support beam frame 100 along the width direction thereof, so that the first track beam 1 and the second track beam 2 can be switched between the open state and the closed state. That is, the first track beam 1 and the second track beam 2 can be close to and away from each other along the width direction. In the closed state, the bogie of the train is movably suspended on the first track beam 1 and the second track beam 2; in the open state, the bogie of the train can be transferred out through the gap between the first track beam 1 and the second track beam 2 under the driving of the hoisting device.

[0051] In the open-close track device provided in the embodiment, the first track beam 1 and the second track beam 2 are initially in the closed state. When the train needs to be overhauled, the train enters the train maintenance platform along the normal running track beam, the bogie of the train is suspended on the first track beam 1 and the second track beam 2 in the closed state, and is parked after walking to the designated maintenance position along the first track beam 1 and the second track beam 2. After parking, the AGV trolley carrying the car body support frame tool moves along the specified direction, enters the lower part of the train and adjusts the pose, and after accurate alignment with the train body frame lifting point, it is lifted upward to slightly lift the whole car. Then, the operating personnel disassemble the connection between the bogie and the car body, and the hoisting device hoists the bogie to release the load applied by the bogie on the first track beam 1 and the second track beam 2. Then, the first track beam 1 and the second track beam 2 are away from each other to switch to the open state, the hoisting device lifts the bogie, and after passing through the gap between the first track beam 1 and the second track beam 2, the bogie is moved out of the maintenance platform. Then, a new fault-free bogie is hoisted to the upper part of the train, and then the operating personnel install the new bogie on the top of the train. After the bogie is installed, the first track beam 1 and the second track beam 2 are closed.

[0052] The open-close track device can separate the bogie from the track beam and transfer the bogie to the designated position under the driving of the hoisting device by switching between the open state and the closed state, without the need for manpower to move the bogie to the designated maintenance position, thereby improving the operation efficiency and reducing the safety hidden danger.

[0053] It should be noted that the bogie in the suspended monorail train passes through the track beam and is suspended on the top surface of the track beam. Taking the train suspended on the first track beam 1 and the second track beam 2 as an example, there is still a gap between the first track beam 1 and the second track beam 2 in the closed state, and the bogie of the train can pass through the gap. Figure 2The figure shows the plan view in the closed state. The lower part of the bogie is the wider mounting part, which is connected with the train roof, the middle part of the bogie is the narrower part, which is used to pass through the gap between the first track beam 1 and the second track beam 2 (the gap cannot pass through the wider mounting part), and the upper part of the bogie is provided with the running wheel, which rolls on the top surface of the first track beam 1 and the second track beam 2.

[0054] When the connection between the lower part of the bogie and the train roof is removed, the first track beam 1 and the second track beam 2 are opened to expand the gap, allowing the wider lower part of the bogie to pass through the gap and move out of the maintenance platform under the lifting of the lifting device.

[0055] Referring to Figure 1 and Figure 3 , the train maintenance platform further comprises a work platform 200 installed on the support beam frame 100, and the installation height of the work platform 200 is lower than the first track beam 1 and the second track beam 2, the position where the bogie is connected with the roof is lower than the first track beam 1 and the second track beam 2, and higher than the work platform 200, and the work personnel climbs onto the work platform 200 to carry out the removal work of the bogie and the installation work of the new bogie.

[0056] Referring to Figure 4 and Figure 5 , the open-close track device further comprises a driving device 3 for driving the first track beam 1 and the second track beam 2 to move relative to the support beam frame 100, and the driving device 3 comprises a rotary driving member 31 and a synchronous belt mechanism 32. The rotary driving member 31 is arranged on the support beam frame 100, the synchronous belt mechanism 32 comprises a driving pulley 321, a driven pulley and a synchronous transmission belt 322, the driving pulley 321 is coaxially connected to the output end of the rotary driving member 31, the driven pulley is rotatably arranged on the support beam frame 100, and the synchronous transmission belt 322 is sleeved on the driving pulley 321 and the driven pulley and connected with the first track beam 1 or the second track beam 2. When the pressure on the first track beam 1 and the second track beam 2 is unloaded (the AGV trolley supports the train body, the lifting device lifts the bogie, and the train is no longer suspended on the first track beam 1 and the second track beam 2), the rotary driving member 31 is started, which drives the driving pulley 321 to rotate, and then the driving pulley 321 drives the driven pulley to rotate through the synchronous transmission belt 322, the extension direction of the synchronous transmission belt 322 is consistent with the width direction of the first track beam 1 and the second track beam 2, and in the transmission process, the first track beam 1 and the second track beam 2 can be driven to move relative to the support beam frame 100, so as to realize the opening and closing of the first track beam 1 and the second track beam 2.

[0057] In this embodiment, the first track beam 1 and the second track beam 2 are both provided with the rotating driving member 31 and the synchronous belt mechanism 32 at both ends along the length direction, so as to provide sufficient power for the opening and closing movement of the first track beam 1 and the second track beam 2.

[0058] In other embodiments, the driving device 3 can also use chain transmission mechanism, gear and rack mechanism and the like for transmission, and is not limited to the synchronous belt mechanism 32 in this embodiment, as long as it can drive the first track beam 1 and the second track beam 2 to move relative to the support beam frame 100 to realize opening and closing.

[0059] Referring to Figure 5 , the support beam frame 100 is also provided with a position sensor 9 for detecting whether the first track beam 1 and the second track beam 2 are moved to the position, and the position sensor 9 emits a signal after being moved to the position, and the control unit issues an instruction for the next step.

[0060] In this embodiment, after the first track beam 1 and the second track beam 2 are re-closed, locking is needed to enable the train to safely drive out of the maintenance platform. Referring to Figure 4 and Figure 6 , the opening and closing type track device further comprises a locking unit 7, and the first track beam 1 and the second track beam 2 are locked on the support beam frame 100 in the closed state through the locking unit 7. The locking unit 7 comprises a linear driving member 71 and a latch 72, the linear driving member 71 is fixedly arranged on the support beam frame 100, and the output end of the linear driving member 71 is connected with the latch 72 to drive the latch 72 to move up and down, so as to be detachably inserted with the first track beam 1 or the second track beam 2 to lock or release the first track beam 1 and the second track beam 2.

[0061] Further, the locking unit 7 further comprises a guide sleeve 73 and a positioning sleeve 74, the guide sleeve 73 is arranged on the support beam frame 100, the first track beam 1 and the second track beam 2 are both provided with the positioning sleeve 74, the latch 72 is movably inserted into the guide sleeve 73 along the axial direction of the latch 72 and is detachably inserted with the corresponding positioning sleeve 74. The axial direction of the guide sleeve 73 is consistent with the driving direction of the linear driving member 71 and the axial direction of the latch 72, which can provide accurate guiding action for the up and down movement of the latch 72. When the first track beam 1 and the second track beam 2 are moved to the closed state, the positioning sleeve 74 is vertically opposite to the guide sleeve 73, and the latch 72 is inserted into the positioning sleeve 74 by moving downward.

[0062] Referring to Figure 4 , the first track beam 1 and the second track beam 2 are both provided with the locking unit 7 at both ends along the length direction to be stably locked.

[0063] Referring to Figure 7 and Figure 8, the first track beam 1 and the second track beam 2 each comprise a beam body 11 and a sliding frame 12, the sliding frame 12 is arranged at the bottom of the beam body 11, and the sliding frame 12 is fixedly connected with one side of the synchronous conveying belt 322. The sliding frame 12 arranged at the bottom of the beam body 11 can be fixedly connected with the synchronous conveying belt 322.

[0064] Continuing to refer to Figure 7 and Figure 8 , the support beam frame 100 is provided with a guide rail 4 along the conveying direction of the synchronous conveying belt 322, and the sliding frame 12 is provided with a roller 121 on the upper and lower sides of the guide rail 4, and the roller 121 is in rolling cooperation with the guide rail 4. The guide rail 4 provides guidance for the sliding of the first track beam 1 and the second track beam 2, avoiding the deviation of the movement of the two. The guide rail 4 is arranged directly above the synchronous belt mechanism 32, and the guide rail 4 is clamped between the two rollers 121, further improving the guidance accuracy. In addition, the cooperation between the roller 121 and the guide rail 4 has smaller friction resistance, reducing the energy consumption of the rotary driving member 31.

[0065] Referring to Figure 8 , the beam body 11 is connected to the sliding frame 12 through an elastic component 5, the beam body 11 is loaded to compress the elastic component 5 and fall on the support beam frame 100, and the beam body 11 can be separated from the support beam frame 100 under the action of the rebound force of the elastic component 5 when the beam body 11 is unloaded. The running wheel of the bogie rolls on the beam body 11, when the train runs into the maintenance platform, the beam body 11 is loaded and compresses the elastic component 5, at this time, the beam body 11 falls on the support beam frame 100. Specifically, referring to Figure 6 , the first contact surface 101 on the support beam frame 100 is in contact with the second contact surface 111 of the beam body 11, so that the beam body 11 transmits the load to the support beam frame 100, and the support beam frame 100 transmits the load to the foundation platform. That is, the beam body 11 is in contact with the support beam frame 100 when it is loaded to transmit the load, so that the support beam frame 100 with strong carrying capacity shares the gravity load of the train, instead of transmitting all the load to the guide rail 4 through the roller 121, avoiding the crushing of the guide rail 4. When the bogie is lifted by the lifting device, the beam body 11 is in an unloaded state, at this time, the beam body 11 is away from the sliding frame 12 under the action of the rebound force of the elastic component 5, and at the same time, the second contact surface 111 is separated from the first contact surface 101 of the support beam frame 100, so that when the beam bodies 11 of the first track beam 1 and the second track beam 2 move relative to the support beam frame 100, there is no friction force between them due to the mutual separation, reducing the resistance when the first track beam 1 and the second track beam 2 move.

[0066] Specifically, referring to Figure 8The elastic assembly 5 comprises a sliding sleeve 51, a compression spring and a guide bolt 52, the sliding sleeve 51 is installed on the sliding frame 12, the compression spring is arranged in the sliding sleeve 51, and the upper end of the compression spring is in abutment with the beam body 11, so that the beam body 11 can compress the compression spring, and the bottom of the sliding sleeve 51 is provided with a through hole for penetrating the guide bolt 52, the guide bolt 52 is in threaded connection with the beam body 11 and extends out through the through hole in the bottom of the sliding sleeve 51 after penetrating the compression spring in the sliding sleeve 51. The guide bolt 52 can connect the beam body 11 and the sliding frame 12 on the one hand, and avoid dislocation of the two, and on the other hand, the guide bolt 52 can play a guiding role when the beam body 11 moves relative to the sliding frame 12. Further, the lower end of the guide bolt 52 is sleeved with a limiting nut 53, the limiting nut 53 can be in abutment with the bottom wall of the sliding sleeve 51, so as to limit the upward movement distance of the beam body 11 when the beam body 11 is switched from the loaded state to the unloaded state. When the beam body 11 is switched from the loaded state to the unloaded state, the compression spring rebounds to move the beam body 11 away from the sliding frame 12, and the limiting nut 53 can prevent the beam body 11 from moving upward beyond the range and being separated from the sliding frame 12.

[0067] Preferably, referring to Figure 8 The open-close track device further comprises a pressure sensor 8 for detecting whether there is a load on the first track beam 1 and the second track beam 2. Only in the case that there is no load on the first track beam 1 and the second track beam 2, the rotary driving member 31 is started to open the first track beam 1 and the second track beam 2, so as to avoid that the first track beam 1 and the second track beam 2 move relative to the support beam frame 100 in the loaded state. The pressure sensor 8 can be arranged on the beam body 11 and detect whether there is a load thereon.

[0068] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A switchable track arrangement, characterized in that The first track beam (1) and the second track beam (2) are arranged to be movably arranged on a support beam frame (100) along the width direction thereof, so that the first track beam (1) and the second track beam (2) can be switched between an open state and a closed state. In the closed state, the bogie of the train is movably suspended on the first track beam (1) and the second track beam (2). In the open state, the bogie of the train can be transferred out through the gap between the first track beam (1) and the second track beam (2) under the driving of the hoisting device. The opening and closing type track device further comprises a driving device (3) for driving the first track beam (1) and the second track beam (2) to move relative to the support beam frame (100), and the driving device (3) comprises: a rotating driving member (31) arranged on the support beam frame (100); a synchronous belt mechanism (32) comprising a driving pulley (321), a driven pulley and a synchronous transmission belt (322), the driving pulley (321) is coaxially connected to the output end of the rotating driving member (31), the driven pulley is rotatably arranged on the support beam frame (100), and the synchronous transmission belt (322) is sleeved on the driving pulley (321) and the driven pulley and connected with the first track beam (1) or the second track beam (2); The first track beam (1) and the second track beam (2) each comprise a beam body (11) and a sliding frame (12), the sliding frame (12) is arranged at the bottom of the beam body (11), and the sliding frame (12) is fixedly connected with one side of the synchronous transmission belt (322); The support beam frame (100) is provided with a guide rail (4) in the conveying direction of the synchronous transmission belt (322), the sliding frame (12) is provided with a roller (121) on the upper side and the lower side of the guide rail (4), and the roller (121) is in rolling fit with the guide rail (4); The opening and closing type track device further comprises an elastic assembly (5), the beam body (11) is connected to the sliding frame (12) through the elastic assembly (5), the beam body (11) is compressed when loaded and falls on the support beam frame (100), and the beam body (11) can be separated from the support beam frame (100) under the rebounding force of the elastic assembly (5) when unloaded; The elastic assembly (5) comprises: a sliding sleeve (51) mounted on the sliding frame (12); a compression spring arranged in the sliding sleeve (51), and the upper end of the compression spring abuts against the beam body (11); ​ A guide bolt (52) is fixedly connected with the beam body (11), and movably penetrates the bottom wall of the compression spring and the sliding sleeve (51) along the axial direction of the guide bolt (52). A limiting nut (53) is sleeved on the guide bolt (52), and the limiting nut (53) can abut against the bottom wall of the sliding sleeve (51) to limit the upward movement distance of the beam body (11) from the loaded state to the unloaded state.

2. The open-close track set according to claim 1, characterized in that Further comprising a locking unit (7), the first track beam (1) and the second track beam (2) are locked on the support beam frame (100) by the locking unit (7) in the closed state, and the locking unit (7) comprises: A linear drive (71) is arranged on the support beam frame (100); A latch (72) is arranged on the output end of the linear drive (71) and is detachably inserted with the first track beam (1) or the second track beam (2).

3. The switchable track arrangement according to claim 2, characterized in that The locking unit (7) further comprises a guide sleeve (73) and a positioning sleeve (74), the guide sleeve (73) is arranged on the support beam frame (100), the first track beam (1) and the second track beam (2) are both provided with the positioning sleeve (74), the latch (72) is movably inserted into the guide sleeve (73) along the axial direction of the latch (72) and is detachably inserted with the positioning sleeve (74).

4. The open-close track set according to claim 1, wherein The opening and closing type track device further comprises a pressure sensor (8) for detecting whether there is a load on the first track beam (1) and the second track beam (2).

5. A train inspection platform characterised in that, A plurality of support beam frames (100) are arranged at intervals along the direction of train travel, and adjacent two support beam frames (100) are both provided with the opening and closing type track device according to any one of claims 1-4.

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