Double-layer walking trolley, ventilator parallel walking system and use method of ventilator parallel walking system

Abstract

The present invention discloses a double-layer walking trolley, a ventilator parallel walking system and a method for using the ventilator parallel walking system. The double-layer walking trolley includes a trolley body, the trolley body includes an upper frame and a lower frame, a plurality of walking wheels and a plurality of retractable supporting legs are arranged at the bottom of the lower frame, and a control device is arranged on the lower frame; the upper frame is arranged on the top of the lower frame, a bearing platform is formed on the top of the upper frame, the lower frame includes a support platform, a driving mechanism and a walking mechanism are arranged on the lower frame, a limiter for fixing the walking mechanism is arranged on the lower frame, the driving mechanism is electrically connected to the control device, the driving mechanism is connected to the walking mechanism, so that the walking mechanism reciprocates relative to the support platform; a plurality of fixed door frames are arranged at intervals on the lower frame. The present invention can meet the needs of fixed installation of two ventilators and Y-shaped air ducts, and can meet the needs of fast and efficient removal and replacement of ventilators, and can adjust the installation position at any time.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction equipment, and in particular to a double-layer walking trolley, a ventilator parallel walking system and a method for using the ventilator parallel walking system. Background Art

[0002] In tunnel construction, tunnel construction ventilation is an important auxiliary construction technical measure, especially in the construction of long and extra-long tunnels. The construction ventilation plan and management effect will directly affect the construction organization, toxic and harmful gas emissions, construction safety and other issues, and are of vital importance. In the construction of long and extra-long tunnels, the tunnel ventilator is different from that of short tunnels (the ventilator is placed at the entrance of the tunnel and the air is sent to the construction work surface through the ventilation pipe). According to the ventilation plan, the ventilator of the tunnel type ventilation will be directly placed in the tunnel (in the tunnel), and the air will be sent to the construction work surface through the ventilation pipe.

[0003] The Technical Specifications for Railway Gas Tunnels TB10120-2019 clearly stipulates that the gas work area must be equipped with a set of spare fans with equivalent performance, which must be kept in good working condition and can be started within 10 minutes. According to the regulations, to ensure that the fans are kept in good working condition, automatic switching tests must be carried out regularly between the normally working fans and the spare fans. Ventilation must not be affected during the test, and the test records must be archived for record.

[0004] The current practice is to install a backup ventilator behind or side by side with the ventilator, and connect the air outlet of the normally working ventilator to a flexible duct. When a fault occurs or maintenance is required, the duct is temporarily disassembled and connected on site and moved from the ventilator to the backup ventilator. However, the overall feasibility of this plan is extremely poor at the construction site, and the ventilation duct is not straight and is bent in some places, causing increased wind resistance. At the same time, any improper operation during implementation will create the risk of failure to switch in time, which will lead to a "wind outage" in the tunnel ventilation and cause major safety accidents.

[0005] The existing technology has a solution of using a Y-shaped air duct to connect two ventilators in parallel, but it is not convenient to fix the Y-shaped air duct and the two ventilators in parallel up and down, and it is not possible to quickly and efficiently replace the ventilators, nor can the positions be adjusted at any time. Summary of the invention

[0006] In order to solve the above problems, the first purpose of the present invention is to provide a double-layer walking trolley that can conveniently fix and install two ventilators and Y-shaped air ducts, can quickly and efficiently remove and replace the ventilators, and can adjust the installation position at any time.

[0007] The second object of the present invention is to provide a fan parallel travel system, which includes the double-layer travel trolley of the first object mentioned above.

[0008] The third object of the present invention is to provide a method for using a ventilator parallel travel system, which is applied to the ventilator parallel travel system of the above-mentioned second object.

[0009] In order to achieve the above-mentioned first purpose, the double-layer walking trolley provided by the present invention includes a trolley body, the trolley body includes an upper frame and a lower frame, the lower surface of the bottom of the lower frame is provided with a plurality of walking wheels and a plurality of retractable supporting legs, a control device is provided on one side of the lower frame, and the control device includes a distribution box; the lower frame includes a first area arranged at the front section of the lower frame, a second area arranged at the middle section of the lower frame, and a third area arranged at the rear section of the lower frame, the upper frame is fixedly arranged at the top of the second area, a bearing platform is formed at the top of the upper frame, an accommodating portion is formed between the upper frame and the lower frame, and the lower frame includes There is a support platform, and a driving mechanism and a traveling mechanism are arranged on the lower frame. A limiting member is arranged on the lower frame in the second area, and the limiting member can fix the traveling mechanism. The support platform is arranged in the first area, the second area and the third area. The driving mechanism is electrically connected to the control device, and the driving mechanism is connected to the traveling mechanism, so that the traveling mechanism reciprocates relative to the support platform along the length direction of the trolley body; a plurality of fixed gantries are arranged at intervals on the first area, and the height of the fixed gantries close to the second area is greater than that of the upper frame, and the height of the plurality of fixed gantries gradually decreases in the direction from the second area to the first area.

[0010] As can be seen from the above, a ventilator is respectively fixed on the load-bearing platform on the upper frame and the traveling mechanism on the lower frame, and the Y-shaped air duct is firmly fixed on the trolley through multiple fixed door frames. The fixed door frames can be set according to the specific shape of the Y-shaped air duct, and the ventilator arranged on the traveling mechanism can reciprocate relative to the support platform with the traveling mechanism. When the ventilator arranged on the traveling mechanism is damaged, the damaged ventilator can be conveniently moved out of the accommodating portion to the third area for replacement and installation through the traveling mechanism, and the movement of the traveling mechanism is driven by controlling the driving mechanism, which effectively saves manpower, and the position of the trolley can be adjusted at any time according to needs through the traveling wheels at the bottom.

[0011] A further solution is that the support platform includes a first vertical support member arranged on the lower frame, a transverse support member is fixedly arranged on the upper part of the first vertical support member, the transverse support member has the same length as the support platform, and two slider rails are arranged on the transverse support member at intervals, and the length of the slider rails is the same as the length of the transverse support member;

[0012] The driving mechanism includes a motor and a gear assembly driven by the motor;

[0013] The walking mechanism includes two slide groove kits of the same size, one slide groove kit can be slidably clamped on the outer surface of a slider track, the length of the slide groove kit is greater than or equal to the length of the accommodating portion, and a rack with the same length as the slide groove kit is provided on the side of the slide groove kit close to the gear assembly, and the gear assembly is meshed with the rack.

[0014] As can be seen from the above, by connecting the rack set on the slideway kit with the gear assembly driven by the driving mechanism, the driving device is controlled by the control device to rotate the gear assembly to drive the walking mechanism to reciprocate, and the structure is simple and easy to assemble.

[0015] A further solution is that both sides of the lateral support member protrude outwardly along the width direction of the lower frame relative to the first vertical support member to form edge portions, and slider rails are fixedly provided at the ends of the two edge portions, and the slider rails protrude from the upper and lower surfaces of the edge portions in the vertical direction.

[0016] A further solution is that the limiting member includes a second cylinder fixedly arranged on the upper surface of the bottom of the lower frame, a second screw rod is rotatably arranged in the second cylinder, and one end of the second screw rod away from the lower frame is fixedly connected to the limiting plate.

[0017] As can be seen from the above, the telescopic limiter that moves vertically can not only fix the traveling mechanism, but also provide certain vertical support for the traveling mechanism to prevent the traveling mechanism from moving during the operation of the ventilator, causing damage to the equipment, the air duct, etc.

[0018] A further solution is that the support leg includes a first cylinder fixedly arranged on the lower surface of the bottom of the lower frame, a first screw rod is rotatably connected in the first cylinder, and an end of the first screw rod away from the lower frame is fixedly connected to the support plate.

[0019] As can be seen from the above, the support legs can fix the trolley in the corresponding position to prevent the trolley from shaking left and right or slipping, causing damage to the air duct, etc.

[0020] In order to achieve the above second purpose, the fan parallel running system provided by the present invention includes a main fan, a standby fan and a rigid Y-shaped air duct;

[0021] The system also includes any double-layer walking trolley of the above-mentioned first purpose, the main fan is fixedly set on the walking mechanism, the backup fan is fixedly set on the bearing platform, the Y-shaped air duct is fixedly set on the support platform located in the first area through multiple fixed door frames, the first air inlet end of the Y-shaped air duct is connected to the air outlet end of the backup fan, the second air inlet end of the Y-shaped air duct is connected to the air outlet end of the main fan, and the air outlet end of the Y-shaped air duct is connected to a ventilation duct.

[0022] A further solution is that the Y-shaped air duct includes a main cylinder and a branch cylinder, the main cylinder is arranged in line with the main fan, an arc-shaped bending portion is formed on the branch cylinder, the first end of the branch cylinder is connected to the main cylinder, the second end of the branch cylinder is the first air inlet end of the Y-shaped air duct, the first end of the main cylinder is the second air inlet end of the Y-shaped air duct, and the second end of the main cylinder is the air outlet end of the Y-shaped air duct.

[0023] As can be seen from the above, the main air duct of the Y-type air duct is arranged in line with the main fan, so that there is only one bending part on the branch cylinder, which effectively reduces the increase in wind resistance caused by the bending of the air duct and greatly improves the efficiency of air supply. The fixed door frame is arranged according to the structure of the Y-type air duct to better fit and fix the Y-type air duct.

[0024] In order to achieve the third objective, the present invention provides a method for using a ventilator parallel travel system, which is applied to any one of the ventilator parallel travel systems described above. The method includes an installation method, which includes:

[0025] Move the double-layer walking trolley to the preset position, lower the supporting legs to level and fix the trolley, install the Y-shaped air duct on the supporting platform in the first area and fix it with multiple fixed gantries, move the walking mechanism to the third area, install the main fan on the walking mechanism and fix it, move the walking mechanism to the second area, seal the main fan and the Y-shaped air duct, fix the walking mechanism with limiters, and fix the spare fan on the bearing platform and fix it to the Y-shaped air duct.

[0026] A further solution is that the use method also includes a disassembly method, and the disassembly method includes:

[0027] When the main fan needs to be replaced, release the fixed connection between the main fan and the Y-shaped duct, loosen the limiter, move the travel mechanism to the third area, replace the main fan, and repeat the above main fan installation steps.

[0028] In summary, it can be seen that the walking trolley provided by the present invention can meet the needs of parallel installation of two ventilators and a Y-shaped air duct, and the main fan can be easily replaced through the connection between the driving mechanism and the walking mechanism, which not only saves manpower but also greatly improves the efficiency of replacement and installation. At the same time, the position of the trolley can be adjusted at any time through the walking wheels at the bottom to meet the needs of connecting the Y-shaped air duct and the ventilation duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of a double-layer walking trolley according to an embodiment of the present invention.

[0030] Figure 2 for Figure 1 Structural diagram in the A direction.

[0031] Figure 3 for Figure 2 Enlarged view of point C in the middle.

[0032] Figure 4 for Figure 3 Schematic diagram of the connection between the middle gear assembly and the slideway kit.

[0033] Figure 5 Schematic diagram of a limit slot according to an embodiment of the present invention.

[0034] Figure 6 Schematic diagram of a limiting member according to an embodiment of the present invention.

[0035] Figure 7 Schematic diagram of a support leg according to an embodiment of the present invention.

[0036] Figure 8 It is a structural diagram of a ventilator parallel running system according to an embodiment of the present invention.

[0037] Fig. 9 It is a schematic diagram of the second state of the ventilator parallel running system according to an embodiment of the present invention.

[0038] Fig.10 for Fig. 9 Structural diagram in the B direction.

[0039] Fig.11 for Fig.10 Enlarged view of point D in the middle. DETAILED DESCRIPTION

[0040] See also Figures 1 to 5 Combined with Figure 8 , Fig. 9 , Fig.10 The double-layer walking trolley of this embodiment includes a trolley body 1, and the trolley body 1 includes an upper frame 101 and a lower frame 102. The lower surface of the bottom of the lower frame 102 is provided with a plurality of walking wheels 3 and a plurality of retractable supporting legs 4. The plurality of walking wheels 3 are arranged in two rows in the width direction of the lower frame 102. The two adjacent walking wheels 3 in each row are arranged at the same distance along the length direction of the lower frame 102. A retractable supporting leg 4 is arranged close to a walking wheel 3. A control device 2 is provided on one side of the lower frame 102. The control device 2 includes a distribution box (not shown in the figure).

[0041] The lower frame 102 includes a first area 1022 arranged at the front section of the lower frame 102, a second area 1021 arranged at the middle section of the lower frame, and a third area 1020 arranged at the rear section of the lower frame. The upper frame is fixedly arranged at the top of the second area 1021. A bearing platform 1010 is formed at the top of the upper frame 101. Eight limiting card slots 9 are arranged at intervals on the top of the bearing platform 1010. The eight limiting card slots 9 are arranged in two rows in the width direction of the bearing platform 1010. One row includes four limiting card slots 9. The four limiting card slots 9 are arranged at a certain distance in the length direction of the bearing platform 1010. Each limiting card slot 9 is fixedly provided with a A buffer rubber pad 91 is provided, and an accommodating portion 1023 is formed between the upper frame 101 and the lower frame 102. A support platform 1024 is provided in the lower frame 102, and a driving mechanism 5 and a traveling mechanism 6 are provided on the lower frame 102. A limiting member 7 is provided on the lower frame 102 in the second area 1021, and the limiting member 7 can fix the traveling mechanism 6. The support platform 1024 is penetrated in the first area 1022, the second area 1021 and the third area 1020. The driving mechanism 5 is electrically connected to the control device 2, and the driving mechanism 5 is connected to the traveling mechanism 6, so that the traveling mechanism 6 reciprocates relative to the support platform 1024 along the length direction of the trolley body 1.

[0042] Three fixed door frames 8 are arranged at intervals on the top of the first area 1022. The height of the fixed door frame 8 near the second area is greater than the upper frame 1010, and is used to accommodate and fix the Y-shaped air duct 11, so as to facilitate the positioning and connection between the spare ventilator 10 arranged on the bearing platform 1010 and the Y-shaped air duct 11. The height of the three fixed door frames 8 gradually decreases from the second area 1021 to the first area 1022. Optionally, the heights of the three fixed door frames 8 are the same to accommodate different Y-shaped air ducts 12.

[0043] The two vertical support rods of each fixed gantry 8 are hinged on the lower frame 102, and a gantry cross beam is fixed on the top of each vertical support rod, and the gantry cross beam is fixed by fasteners. The optional fixed gantry 8 is in the shape of a clamp, and the fixed gantry 8 includes two semicircular clamps, and the tops of the two clamps are fixed by fasteners.

[0044] See also Figures 1 to 4The support platform 1024 of this embodiment includes a first vertical support member 10241 arranged on the lower frame, and the first vertical support member 10241 is fixedly arranged on the upper surface of the bottom of the lower frame 102, and the first vertical support member 10241 includes two identical groups of vertical support column groups arranged at a certain distance in the width direction of the lower frame 102, and each group of vertical support column groups includes a plurality of vertical support columns arranged at the same distance in the length direction of the lower frame 102, and a transverse support member 10240 is fixedly arranged on the upper part of the first vertical support member 10241, and the transverse support member 10240 includes a plurality of transverse support beams arranged at intervals in the length direction of the lower frame 102, and each transverse support beam is fixed to the top of every two corresponding vertical support columns arranged along the width direction of the lower frame 102 by fasteners or welding, and both ends of each transverse support beam protrude outwardly by the same distance in the width direction of the lower frame 102 relative to the two corresponding vertical support columns to form an edge portion 10242. Optionally, the first vertical support member 10241 is an integrally formed metal box, and the horizontal support member 10240 is a metal plate fixed on the metal box. Optionally, the carrying platform 1010 is also a metal plate.

[0045] The walking mechanism 6 is two slideway sets 61 of the same size, and two slider rails 62 are fixed to the ends of the edge portion 10242 formed at both ends of each transverse support beam by fasteners, so as to connect the multiple transverse support beams arranged at intervals into a whole. Optionally, the slider rails 62 are welded and fixed to the ends of the edge portion 10242 formed at both ends of each transverse support beam, or the slider rails 62 are integrally formed with the transverse support member 10240.

[0046] The length of the slider rail 62 is consistent with the length of the transverse support member 10240, and the slider rail 62 protrudes from the upper surface and the lower surface of the edge portion 1024 in the vertical direction. The slide groove kit 61 is C-shaped, and one slide groove kit 61 can be slidably engaged with the outer surface of one slider rail 62, and the length of the slide groove kit 61 is greater than or equal to the length of the accommodating portion. Optionally, the walking mechanism 6 is two sliders, and the two slide groove rails are both open at the top and are spaced apart on the upper surface of the support platform 1024. A dovetail groove is formed in the slide groove rail, and the slider can be slidably engaged in the dovetail groove.

[0047] The driving mechanism 5 includes a motor 51 and a gear assembly 50 driven by the motor, the gear assembly 50 includes a motor gear 53 fixedly connected to one end of the motor 50 and a transmission gear 52, a rack 63 having the same length as the slideway assembly 61 is provided on one side of the slideway assembly 61 close to the gear assembly 50, and the transmission gear 52 is respectively meshed with the motor gear 53 and the rack 63 provided on one side of the slideway assembly 61. Optionally, the driving mechanism 5 can be a cylinder and a connecting rod driven by the cylinder, and the connecting rod is fixedly connected to the walking mechanism.

[0048] See also Figure 1 and Figure 2 The upper frame 101 of this embodiment includes a second vertical support member 10243, and the second vertical support member 10243 includes a plurality of vertical support rods arranged at intervals along the length direction of the second area 1021. The length of the vertical support rods is greater than the vertical support columns and is arranged at intervals from the first vertical support member 10241. The first ends of the plurality of vertical support rods are welded and fixed to the bottom of the lower frame 102, and the second ends of the plurality of vertical support rods are welded and fixed to the bearing platform 1010. Two oblique support beams 10244 are connected between each vertical support rod and the lower surface of the bottom of the bearing platform 1010, and one end of the oblique support beam 10244 connected to the lower surface of the bottom of the bearing platform 1010 corresponds to the limit slot 9.

[0049] See also Figure 5 The position-limiting slot 9 of this embodiment includes a rectangular slot body, which includes a slot wall 93 and a rectangular slot 92 with a top opening formed in the slot body. A buffer rubber pad 91 corresponding to the size of the bottom surface of the slot 92 is fixed in the slot 92. Four through holes are correspondingly arranged on the buffer rubber pad 91 and the bottom wall of the slot body. The four through holes are all arranged near the corners of the slot 92. Four threaded holes are also correspondingly arranged on the bearing platform 1010 and the slideway kit 61. Four bolts 94 pass through the four through holes to fix the position-limiting slot 9 on the bearing platform 1010 or the slideway kit 61. Optionally, the slot body also includes a cylindrical shape, and the slot 92 also includes a cylindrical shape. In this case, the four through holes are arranged at intervals near the slot wall 93 with equal arc lengths.

[0050] See also Figure 6 The limiting member of this embodiment includes a second cylinder 71 fixedly arranged on the upper surface of the bottom of the lower frame, a second screw rod 72 is rotatably arranged in the second cylinder 71, and one end of the second screw rod 72 away from the lower frame 102 is fixedly connected to the limiting plate 73. Optionally, the limiting member includes a plurality of fixing pins, and a plurality of limiting holes are correspondingly opened at the top of the slider track 62 and the top of the slideway assembly 61 in the second region, and the fixing pins are inserted into the limiting holes.

[0051] See also Figure 7 The support leg 4 of this embodiment includes a first cylinder 41 fixedly arranged on the lower surface of the bottom of the lower frame, a first screw rod 42 is rotatably connected in the first cylinder 41, and an end of the first screw rod 42 away from the lower frame 102 is fixedly connected to a support plate 43.

[0052] See also Figures 8 to 11 The fan parallel travel system of this embodiment includes a main fan 11, a standby fan 10, a rigid Y-shaped air duct 12 and the above-mentioned double-layer travel trolley. The rigid Y-shaped air duct is made of metal material or rigid composite material, such as stainless steel, fiberglass, etc.

[0053] The legs of the main fan 11 are fixedly arranged in a plurality of limit slots 9 on the walking mechanism 6, and the legs of the standby fan 10 are fixedly arranged in a plurality of limit slots 9 arranged on the carrying platform 1010;

[0054] The Y-shaped air duct 12 is fixedly arranged on the support platform 1024 through three fixed door frames 8. The Y-shaped air duct 12 includes a main cylinder 120 and a branch cylinder 121. The main cylinder 120 is arranged in line with the main fan 11. An arc-shaped bending portion is formed on the branch cylinder 121. The first end of the branch cylinder 121 is connected to the main cylinder 120. The second end of the branch cylinder 121 is the first air inlet end of the Y-shaped air duct, the first end of the main cylinder 120 is the second air inlet end of the Y-shaped air duct 12, and the second end of the main cylinder 120 is the air outlet end of the Y-shaped air duct 12.

[0055] The first air inlet end of the Y-shaped air duct 12 is connected to the air outlet end of the backup fan 10 , the second air inlet end of the Y-shaped air duct 12 is connected to the air outlet end of the main fan 11 , and the air outlet end of the Y-shaped air duct 12 is connected to a ventilation duct 13 .

[0056] See also Figure 8 and Fig. 9 The method for using the above-mentioned ventilator parallel travel system of this embodiment includes an installation step, which includes:

[0057] First, move the double-layer walking trolley to the preset position, lower the supporting legs 4 to level and fix the trolley, then install the Y-shaped air duct 12 on the supporting platform 1024 located in the first area 1022 and fix it with three fixed gantries 8, then move the walking mechanism 6 to the third area 1020, install the main fan 11 on the walking mechanism 6 and fix it, then move the walking mechanism 6 to the second area 1021 and seal it with the Y-shaped air duct 12, use the limiter 7 to fix the walking mechanism 6, and finally fix the spare fan 10 on the supporting platform 1010 and fix it with the Y-shaped air duct 12.

[0058] The air outlets of the main fan 11 and the standby fan 10 are connected to the air outlet of the Y-shaped air duct 12 in a sealed connection in the form of "bolts + sealing gaskets + connecting flanges".

[0059] The ventilating tube 13 is a flexible ventilating tube, and the air outlet end of the Y-shaped ventilating tube 12 and the air inlet end of the ventilating tube 13 are connected to the flexible ventilating tube in a sealing manner by a hoop.

[0060] The method of use also includes a disassembly step, which includes:

[0061] When the main fan 11 needs to be replaced, release the fixed connection between the main fan 11 and the Y-shaped wind tube 12, loosen the limiter 7, move the walking mechanism 6 to the third area 1020, replace the main fan 11, and repeat the above installation steps of the main fan 11.

[0062] In summary, it can be seen that the double-layer walking trolley provided by the present invention is not only simple and light in structure, but also can meet the needs of installing two ventilators in parallel with a Y-shaped air duct. Through the walking mechanism that reciprocates relative to the support platform, it can meet the needs of quickly and efficiently removing and replacing the ventilators. At the same time, the walking wheels and support legs at the bottom can adjust the position at any time.

[0063] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A double-layer walking trolley, comprising a trolley body, wherein the trolley body comprises an upper frame and a lower frame, wherein the lower surface of the bottom of the lower frame is provided with a plurality of walking wheels and a plurality of retractable supporting legs, and a control device is provided on one side of the lower frame, wherein the control device comprises a distribution box; Features: The lower frame includes a first area arranged at the front section of the lower frame, a second area arranged at the middle section of the lower frame, and a third area arranged at the rear section of the lower frame, the upper frame is fixedly arranged at the top of the second area, a load-bearing platform is formed at the top of the upper frame, and a receiving portion is formed between the upper frame and the lower frame, the lower frame includes a support platform, a driving mechanism and a walking mechanism are arranged on the lower frame, a limiting member is arranged on the lower frame in the second area, the limiting member can fix the walking mechanism, the support platform is penetrated through the first area, the second area and the third area, the driving mechanism is electrically connected to the control device, and the driving mechanism is connected to the walking mechanism, so that the walking mechanism reciprocates relative to the support platform along the length direction of the trolley body; A ventilator is fixed on the carrying platform and the walking mechanism respectively, and the ventilator arranged on the walking mechanism follows the walking mechanism to make reciprocating motion relative to the support platform; A plurality of fixed gantries are arranged at intervals on the first area, the height of the fixed gantries close to the second area is greater than the upper frame, and the heights of the plurality of fixed gantries gradually decrease from the second area to the first area; A plurality of the fixed door frames fix the Y-shaped air duct on the trolley; The support platform comprises a first vertical support member arranged on the lower frame, a transverse support member is fixedly arranged on the upper part of the first vertical support member, the transverse support member has the same length as the support platform, and two slider rails are arranged on the transverse support member at intervals, and the length of the slider rails is the same as the length of the transverse support member; The driving mechanism includes a motor and a gear assembly driven by the motor; The walking mechanism includes two slide groove kits of the same size, one of the slide groove kits can be slidably clamped on the outer surface of one of the slider tracks, the length of the slide groove kit is greater than or equal to the length of the accommodating portion, and a rack with the same length as the slide groove kit is provided on one side of the slide groove kit close to the gear assembly, and the gear assembly is meshed with the rack.

2. The double-layer walking trolley according to claim 1 is characterized in that: Both sides of the lateral support member are formed with edge portions protruding outwardly in the width direction of the lower frame relative to the first vertical support member, and the slider rails are fixedly provided at the ends of the two edge portions, and the slider rails protrude from the upper and lower surfaces of the edge portions in the vertical direction.

3. The double-layer walking trolley according to claim 2 is characterized in that: The limiting member comprises a second cylinder body fixedly arranged on the upper surface of the bottom of the lower frame, a second screw rod is rotatably arranged in the second cylinder body, and one end of the second screw rod away from the lower frame is fixedly connected to the limiting plate.

4. The double-deck walking trolley according to any one of claims 1 to 3, characterized in that: The support leg comprises a first cylinder fixedly arranged on the lower surface of the bottom of the lower frame, a first screw rod is rotatably connected in the first cylinder, and an end of the first screw rod away from the lower frame is fixedly connected to a support plate.

5. Fan parallel travel system, including main fan, standby fan and rigid Y-shaped fan tube, Features: The system also includes a double-layer walking trolley as described in any one of claims 1 to 3, the main fan is fixedly set on the walking mechanism, the backup fan is fixedly set on the bearing platform, the Y-shaped air duct is fixedly set on the support platform located in the first area through a plurality of fixed door frames, the first air inlet end of the Y-shaped air duct is connected to the air outlet end of the backup fan, the second air inlet end of the Y-shaped air duct is connected to the air outlet end of the main fan, and the air outlet end of the Y-shaped air duct is connected to a ventilation duct.

6. The fan parallel running system according to claim 5, characterized in that: The Y-shaped air duct includes a main cylinder and a branch cylinder, the main cylinder is arranged in line with the main fan, an arc-shaped bending portion is formed on the branch cylinder, the first end of the branch cylinder is connected to the main cylinder, the second end of the branch cylinder is the first air inlet end of the Y-shaped air duct, the first end of the main cylinder is the second air inlet end of the Y-shaped air duct, and the second end of the main cylinder is the air outlet end of the Y-shaped air duct.

7. A method for using a ventilator parallel travel system, applied to the ventilator parallel travel system as claimed in claim 5 or 6, characterized in that: The method includes an installation method, the installation method comprising: Move the double-layer walking trolley to a preset position, lower the supporting legs to level and fix the trolley, install the Y-shaped air duct on the supporting platform located in the first area and fix it with a plurality of the fixed gantries, move the walking mechanism to the third area, install the main fan on the walking mechanism and fix it, move the walking mechanism to the second area, seal the main fan and the Y-shaped air duct, fix the walking mechanism with the limiter, and fix the spare fan on the bearing platform and fixedly connect it to the Y-shaped air duct.

8. The method for using the fan parallel running system according to claim 7, characterized in that: Also included is a disassembly and replacement method, the disassembly and replacement method comprising: When the main fan needs to be replaced, the fixed connection between the main fan and the Y-shaped air duct is released, the limiter is loosened, the walking mechanism is moved to the third area, the main fan is replaced, and the above-mentioned main fan installation steps are repeated.

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