CN217206528U - Double-layer walking trolley and ventilator parallel walking system - Google Patents
Double-layer walking trolley and ventilator parallel walking system Download PDFInfo
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- CN217206528U CN217206528U CN202123234850.2U CN202123234850U CN217206528U CN 217206528 U CN217206528 U CN 217206528U CN 202123234850 U CN202123234850 U CN 202123234850U CN 217206528 U CN217206528 U CN 217206528U
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Abstract
The utility model discloses a double-deck walking platform truck, the parallelly connected traveling system of ventilation blower, double-deck walking platform truck includes the platform truck body, the platform truck body includes frame and lower frame, the lower surface of lower frame bottom is provided with a plurality of walking wheels and a plurality of telescopic supporting legs, the fixed top that sets up in lower frame second region of frame, it is formed with load-bearing platform to go up the frame top, it has the portion of holding to go up to be formed between frame and the lower frame, including a supporting bench in the lower frame, a supporting bench wears to locate in the first region of lower frame, second region and third region, the interval is provided with a plurality of fixed gantries on the frame first region of lower frame, the height of the fixed gantry that is close to the second region is greater than the frame of going up; the supporting table top and the corresponding position of the top of the bearing platform are fixedly provided with a plurality of limiting clamping grooves, and the limiting clamping grooves are provided with buffer rubber pads. The utility model discloses can reduce the influence of the vibration of ventilation blower during operation to each connection structure of platform truck.
Description
Technical Field
The utility model relates to a tunnel construction equipment field especially relates to a parallelly connected traveling system of double-deck walking platform truck, ventilation blower.
Background
In the construction of tunnel engineering, the ventilation of tunnel construction is an important auxiliary construction technical measure, and especially in the construction of long and extra-long tunnels, the construction ventilation scheme and the management effect directly influence the problems of construction organization, toxic and harmful gas emission, construction safety and the like, and are of great importance. And in the construction of long and extra-long tunnels, the tunnel ventilator is different from short tunnels (the ventilator is placed at the opening of the tunnel and sends wind into the construction working surface by utilizing the ventilation pipe), the ventilator adopting tunnel type ventilation is directly placed into the tunnel according to the ventilation scheme requirement, and then the ventilation pipe is used for sending the wind into the construction working surface.
In technical specification of railway gas tunnels TB10120-2019 there are specified for ventilation devices: a set of spare ventilators with the same performance are required to be arranged in a gas work area, the good use state is kept, and the ventilators can be started within 10 min. And according to the regulation, in order to ensure that the fan keeps a good use state, the automatic switching test is carried out on the normally working fan and the standby fan at regular intervals, the ventilation is not influenced during the test, and the test records are filed and put on record.
At present, a standby ventilator is installed behind the ventilator or side by side, the air outlet of the normally working ventilator is connected with a flexible air duct, when a fault occurs or the ventilator is maintained, a method of temporarily dismounting and connecting the air duct on site and moving the air duct to the standby ventilator from the ventilator is adopted, however, the scheme has extremely poor implementation performance of overall operation on a construction site, the ventilation duct is not straight, the wind resistance is increased due to local position bending, meanwhile, the risk of switching in time can be generated due to slight misoperation in implementation, and further, the tunnel ventilation is caused to be in a 'wind break' site, and serious safety accidents are caused.
The prior art discloses to install the ventilation blower on the lining cutting platform truck, but the ventilation blower during operation can long time produce the vibration, leads to on the platform truck each connection structure's stability to have destroyed risk, leads to the life of platform truck to shorten.
Disclosure of Invention
In order to solve the problems existing in the prior art, the utility model aims to provide a double-deck walking trolley which can reduce the influence of the vibration of the working time of a ventilator on each connecting structure of the trolley.
The second purpose of the utility model is to provide a parallelly connected traveling system of ventilation blower, this system includes the double-deck walking platform truck of above-mentioned first purpose.
In order to achieve the first purpose, the utility model provides a double-deck walking platform truck, including the platform truck body, the platform truck body includes frame and lower frame, the lower surface of lower frame bottom is provided with a plurality of walking wheels and a plurality of telescopic supporting legs, lower frame is including setting up in the first region of lower frame anterior segment, set up in the second region of lower frame middle section and set up in the third region of lower frame back end, the fixed top that sets up in the second region of frame is gone up, it is formed with load-bearing platform to go up the frame top, it has the portion of holding to be formed between frame and the lower frame, including the brace table in the lower frame, the brace table wears to locate in first region, second region and third region, the interval is provided with a plurality of fixed portals on the first region, the height that is close to the fixed portal of second region is greater than frame; the top interval that is located the brace table top in the third region is provided with a plurality of spacing draw-in grooves, and load-bearing platform's top interval is provided with a plurality of spacing draw-in grooves, and spacing draw-in groove includes the cell body, and the cell body includes the open-top's that cell wall and cell body formed recess, and the recess internal fixation is provided with rubber buffer pad.
By the scheme, the plurality of limiting clamping grooves formed in the bearing platform and the supporting platform can conveniently realize the positioning and installation of the ventilators, and meanwhile, the buffer rubber pads arranged in the limiting clamping grooves can effectively reduce the influence of vibration generated during the working of the two ventilators on each connecting structure of the trolley.
Further, the cross section of the groove is in a round or rectangular shape with an opening at the upper end.
The further scheme is that the buffer rubber pad and the groove body are fixed on the bearing platform through a plurality of bolts arranged in the groove at intervals, and the bolts are arranged close to the groove wall.
The further scheme is that the buffer rubber pads and the groove body are fixed on the supporting table through a plurality of bolts arranged in the grooves at intervals, and the bolts are arranged close to the groove wall.
From top to bottom, through the bolt with fixed the setting of cell body and cushion rubber pad on load-bearing platform or brace table, conveniently tear open the operation of trading to cushion rubber pad.
The further scheme is that the upper frame comprises a second vertical supporting piece, the first end of the second vertical supporting piece is fixedly connected with the bottom of the lower frame, the second end of the second vertical supporting piece is fixedly connected with the bearing platform, an inclined support is connected between the second vertical supporting piece and the lower surface of the bottom of the bearing platform, and one end, connected with the lower surface of the bottom of the bearing platform, of the inclined support corresponds to the limiting clamping groove.
It is from top to bottom visible, through the bearing diagonal brace of being connected between the lower surface of second vertical support piece and load-bearing platform bottom to the one end that the lower surface of bearing platform bottom is connected of bearing diagonal brace corresponds with spacing draw-in groove, the effectual stability that improves the frame structure of going up.
In order to achieve the second purpose, the utility model provides a ventilator parallel running system, which comprises a main ventilator, a standby ventilator and a rigid Y-shaped air duct;
the system further comprises the double-layer walking trolley, the main ventilator is fixedly arranged on a supporting platform located in the third area, the standby ventilator is fixedly arranged on the bearing platform, the Y-shaped air cylinder is fixedly arranged on the supporting platform through a plurality of fixing gantries, the first air inlet end of the Y-shaped air cylinder is communicated with the air outlet end of the standby ventilator, the second air inlet end of the Y-shaped air cylinder is communicated with the air outlet end of the main ventilator, and the air outlet end of the Y-shaped air cylinder is communicated with the air funnel.
Y type dryer includes main cylinder and a branch barrel, main cylinder and main fan collineation setting, be formed with an arc portion of bending on the branch barrel, the first end and the main cylinder intercommunication of branch barrel, the second end of branch barrel is the first air inlet end of Y type dryer, the first end of main cylinder is the second air inlet end of Y type dryer, the second air inlet end of main cylinder extends to the third region along the length direction of frame down, the second end of main cylinder is the air-out end of Y type dryer.
To sum up, the utility model provides a double-deck walking platform truck is through the spacing draw-in groove that sets up on load-bearing platform and brace table and the cushion rubber pad that is located spacing draw-in groove, can effectually reduce the influence of the vibration that two parallelly connected ventilators during operation that set up produced to each connection structure of frame, when the ventilation blower is connected with Y type dryer simultaneously, also can effectually reduce the vibration to two ventilation blower air-out ends respectively with the influence of two air inlet ends of Y type dryer between connection structure's stability.
Drawings
Fig. 1 is a structural diagram of a double-deck traveling carriage according to an embodiment of the present invention.
Fig. 2 is a structural view in the direction a in fig. 1.
Fig. 3 is an enlarged view at C in fig. 2.
Fig. 4 is a schematic view of the gear assembly of fig. 3 connected to a chute assembly.
Fig. 5 is a schematic diagram of a limiting card slot according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a position limiting element according to an embodiment of the present invention.
Fig. 7 is a schematic view of a support leg according to an embodiment of the present invention.
Fig. 8 is a structural diagram of a parallel walking system of ventilators according to an embodiment of the present invention.
Fig. 9 is a schematic view of a second state of the ventilator parallel walking system according to the embodiment of the present invention.
Fig. 10 is a structural view in the direction B in fig. 9.
Fig. 11 is an enlarged view of fig. 10 at D.
Detailed Description
Referring to fig. 1 to 5 in combination with fig. 8, 9 and 10, the double-deck traveling trolley of the present embodiment includes a trolley body 1, the trolley body 1 includes an upper frame 101 and a lower frame 102, a plurality of traveling wheels 3 and a plurality of telescopic supporting legs 4 are disposed on a lower surface of a bottom of the lower frame 102, the plurality of traveling wheels 3 are disposed in two rows at intervals in a width direction of the lower frame 102, two adjacent traveling wheels 3 of each row are disposed at the same interval along a length direction of the lower frame 102, one telescopic supporting leg 4 is disposed near one traveling wheel 3, a control device 2 is disposed on one side of the lower frame 102, and the control device 2 includes a distribution box (not shown in the figure);
the lower frame 102 comprises 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 clamping grooves 9 are arranged at intervals at the top of the bearing platform 1010, the eight limiting clamping grooves 9 are arranged in two rows in the width direction of the bearing platform 1010, one row comprises four limiting clamping grooves 9, the four limiting clamping grooves 9 are arranged at intervals in the length direction of the bearing platform 1010, a cushion rubber pad 91 is fixedly arranged in each limiting clamping groove 9, an accommodating part 1023 is formed between the upper frame 101 and the lower frame 102, a supporting platform 1024 is arranged in the lower frame 102, a driving mechanism 5 and a walking mechanism 6 are arranged on the lower frame 102, a limiting part 7 is arranged on the lower frame 102 in the second area 1021, the limiting member 7 can fix the traveling mechanism 6, the support platform 1024 is arranged in the first area 1022, the second area 1021 and the third area 1020 in a penetrating manner, the driving mechanism 5 is electrically connected with the control device 2, and the driving mechanism 5 is connected with the traveling mechanism 6, so that the traveling mechanism 6 reciprocates along the length direction of the trolley body 1 relative to the support platform 1024;
the top of the first region 1022 is provided with three fixed gantries 8 at intervals, the height of the fixed gantry 8 close to the second region is greater than that of the upper frame 1010, the fixed gantry is used for accommodating and fixing the Y-shaped air duct 11, the standby ventilator 10 arranged on the bearing platform 1010 is conveniently connected with the Y-shaped air duct 11 in a positioning manner, and the heights of the three fixed gantries 8 are gradually reduced along the direction from the second region 1021 to the first region 1022. Alternatively, the three fixed gantries 8 are of the same height to accommodate different Y-ducts 12.
Two portal vertical support rods of each fixed portal 8 are hinged on the lower frame 102, a portal beam is fixed at the top of each portal vertical support rod, and the portal beams are fixed through fasteners. The optional fixed portal 8 is in the shape of a hoop, and the fixed portal 8 comprises two semicircular clamping rings, and the tops of the two clamping rings are fixed through a fastening piece.
Referring to fig. 1 to 4, the supporting platform 1024 of this embodiment includes a first vertical supporting member 10241 disposed on the lower frame, the first vertical supporting member 10241 is fixedly disposed on the upper surface of the bottom of the lower frame 102, the first vertical supporting member 10241 includes two same sets of vertical supporting columns disposed at a certain distance in the width direction of the lower frame 102, each set of vertical supporting columns includes a plurality of vertical supporting columns disposed at a same distance in the length direction of the lower frame 102, a horizontal supporting member 10240 is fixedly disposed on the upper portion of the first vertical supporting member 10241, the horizontal supporting member 10240 includes a plurality of horizontal supporting beams disposed at a certain distance in the length direction of the lower frame 102, each horizontal supporting beam is fixed on the top of each two corresponding vertical supporting columns disposed along the width direction of the lower frame 102 by fasteners or welding, two ends of each horizontal supporting beam protrude outward at a same distance in the width direction of the lower frame 102 relative to two corresponding vertical supporting columns, and have an edge formed A rim 10242. Alternatively, the first vertical support 10241 is an integrally formed metal box and the transverse supports 10240 are metal plates secured to the metal box. Alternatively, the load-bearing platform 1010 is also a metal plate.
The running mechanism 6 is composed of two sliding groove sleeve members 61 with the same size, two sliding block tracks 62 are fixed at the end parts of edge parts 10242 formed at two ends of each transverse supporting beam through fasteners, and a plurality of transverse supporting beams arranged at intervals are connected into a whole. Alternatively, the slider rails 62 may be welded to the ends of the rim 10242 formed at the two ends of each transverse support beam or the slider rails 62 may be integrally formed with the transverse supports 10240.
The length of the slider rails 62 is identical to the length of the lateral supports 10240, and the slider rails 62 protrude from the upper and lower surfaces of the rim 1024 in the vertical direction. The sliding groove sleeve member 61 is in a C shape, one sliding groove sleeve member 61 is slidably clamped on the outer surface of one sliding block track 62, and the length of the sliding groove sleeve member 61 is larger than or equal to that of the accommodating part. Optionally, the traveling mechanism 6 is two sliding blocks, the top of each of the two sliding groove tracks is open and is arranged on the upper surface of the support platform 1024 at intervals, dovetail grooves are formed in the sliding groove tracks, and the sliding blocks are slidably clamped in the dovetail grooves.
The driving mechanism 5 comprises a motor 51 and a gear assembly 50 driven by the motor, the gear assembly 50 comprises a motor gear 53 fixedly connected with one end of the motor 50 and a transmission gear 52, one side of the chute assembly 61 close to the gear assembly 50 is provided with a rack 63 with the same length as that of the chute assembly 61, and the transmission gear 52 is respectively meshed with the motor gear 53 and the rack 63 arranged on one side of the chute assembly 61. Alternatively, the driving mechanism 5 may be a cylinder and a connecting rod driven by the cylinder, and the connecting rod is fixedly connected with the traveling mechanism.
Referring to fig. 1 and 2, the upper frame 101 of this embodiment includes a second vertical support 10243, the second vertical support 10243 includes a plurality of vertical support bars spaced apart from each other along a length direction of a second region 1021, a length of each vertical support bar is greater than that of each vertical support bar and is spaced apart from the first vertical support 10241, first ends of the plurality of vertical support bars are welded to the bottom of the lower frame 102, second ends of the plurality of vertical support bars are welded to the carrying platform 1010, two inclined support beams 10244 are connected between each vertical support bar and a lower surface of the bottom of the carrying platform 1010, and one end of each inclined support beam 10244 connected to the lower surface of the bottom of the carrying platform 1010 corresponds to the limiting clamping slot 9.
Referring to fig. 5, the limiting clamping groove 9 of this embodiment includes a rectangular parallelepiped groove body, the groove body includes a groove wall 93 and a rectangular parallelepiped groove 92 with an open top formed in the groove body, a cushion rubber pad 91 corresponding to the bottom surface of the groove 92 is fixed in the groove 92, four through holes are correspondingly provided on the bottom walls of the cushion rubber pad 91 and the groove body, the four through holes are all disposed near the corners of the groove 92, four threaded holes are correspondingly provided on the bearing platform 1010 and the sliding groove external member 61, and four bolts 94 pass through the four through holes to fix the limiting clamping groove 9 on the bearing platform 1010 or the sliding groove external member 61. Alternatively, the channel body may also comprise a cylindrical shape, and the groove 92 may also comprise a cylindrical shape, in which case four through holes with equal arc lengths are spaced apart from the channel wall 93.
Referring to fig. 6, the limiting member of this embodiment includes a second cylinder 71 fixedly disposed on the upper surface of the bottom of the lower frame, a second screw 72 is rotatably disposed in the second cylinder 71, and a limiting plate 73 is fixedly connected to one end of the second screw 72 away from the lower frame 102. Optionally, the limiting member includes a plurality of fixing bolts, a plurality of limiting holes are correspondingly formed in the top of the slider rail 62 in the second region and the top of the sliding groove set 61, and the fixing bolts are inserted into the limiting holes.
Referring to fig. 7, the support leg 4 of the present embodiment includes a first cylinder 41 fixedly disposed on the lower surface of the bottom of the lower frame, a first lead screw 42 rotatably connected in the first cylinder 41, and a support plate 43 fixedly connected to one end of the first lead screw 42 far away from the lower frame 102.
Referring to fig. 8 to 11, the parallel ventilator traveling system of the present embodiment includes a main ventilator 11, a standby ventilator 10, a rigid Y-shaped air duct 12, and the double-deck traveling carriage described above. The rigid Y-shaped air duct is made of a metal material or a rigid composite material. Such as stainless steel, glass fiber reinforced plastic, etc.
The supporting legs of the main ventilator 11 are respectively and fixedly arranged in the plurality of limiting clamping grooves 9 on the travelling mechanism 6, and the supporting legs of the standby ventilator 10 are respectively and fixedly arranged in the plurality of limiting clamping grooves 9 arranged on the bearing platform 1010;
the Y-shaped air duct 12 is fixedly arranged on the support platform 1024 through three fixing door frames 8, the Y-shaped air duct 12 comprises a main duct body 120 and a branch duct body 121, the main duct body 120 and the main ventilator 11 are arranged in a collinear manner, an arc-shaped bent part is formed on the branch duct body 121, a first end of the branch duct body 121 is communicated with the main duct body 120, a second end of the branch duct body 121 is a first air inlet end of the Y-shaped air duct, a first end of the main duct body 120 is a second air inlet end of the Y-shaped air duct 12, and a second end of the main duct body 120 is an air outlet end of the Y-shaped air duct 12;
the first air inlet end of the Y-shaped air duct 12 is communicated with the air outlet end of the standby ventilator 10, the second air inlet end of the Y-shaped air duct 12 is communicated with the air outlet end of the main ventilator 11, and the air outlet end of the Y-shaped air duct 12 is communicated with the ventilator 13.
Referring to fig. 8 and 9, the method of using the parallel ventilator walking system of the present embodiment includes a mounting step including:
firstly, moving a double-layer traveling trolley to a preset position, putting down a supporting leg 4 to level and fix the trolley, then installing a Y-shaped air duct 12 on a supporting platform 1024 in a first area 1022 and fixing the Y-shaped air duct by using three fixing door frames 8, then enabling a traveling mechanism 6 to move to a third area 1020, installing a main ventilator 11 on the traveling mechanism 6 and fixing the main ventilator, then moving the traveling mechanism 6 to a second area 1021 and sealing-connecting the traveling mechanism with the Y-shaped air duct 12, fixing the traveling mechanism 6 by using a limiting part 7, and finally fixedly installing a standby ventilator 10 on a bearing platform 1010 and fixedly connecting the standby ventilator with the Y-shaped air duct 12.
The joints of the air outlets of the main ventilator 11 and the spare ventilator 10 and the air outlet of the Y-shaped air duct 12 are hermetically connected in a mode of bolts, sealing gaskets and connecting flanges.
The air funnel 13 is a flexible air funnel, and the joint of the air outlet end of the Y-shaped air funnel 12 and the air inlet end of the air funnel 13 is connected with the flexible air funnel in a sealing manner by a hoop.
The use method also comprises a replacing step, and the replacing step comprises the following steps:
when the main ventilator 11 needs to be replaced, the fixed connection between the main ventilator 11 and the Y-shaped air duct 12 is released, the limiting member 7 is loosened, the traveling mechanism 6 is moved to the third area 1020, the main ventilator 11 is replaced, and the installation steps of the main ventilator 11 are repeated.
To sum up, the utility model provides a double-deck walking platform truck is simple structure light not only, can satisfy the demand of two ventilators and the parallelly connected installation of Y type dryer moreover, can satisfy the demand that high efficiency torn open the ventilation blower through the running gear for a supporting bench reciprocating motion, and the walking wheel and the supporting leg of bottom can be adjusted the position at any time simultaneously.
It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all the insubstantial modifications made by using the design concept of the present invention also fall within the protection scope of the present invention.
Claims (7)
1. The double-layer walking trolley comprises a trolley body, the trolley body comprises an upper trolley frame and a lower trolley frame, the lower surface of the bottom of the lower trolley frame is provided with a plurality of walking wheels and a plurality of telescopic supporting legs,
the method is characterized in that:
the lower frame comprises 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 part is formed between the upper frame and the lower frame, a supporting table is arranged in the lower frame and penetrates through the first area, the second area and the third area, a plurality of fixed door frames are arranged on the first area at intervals, and the height of the fixed door frame close to the second area is larger than that of the upper frame;
be located in the third region the top interval of brace table is provided with a plurality of spacing draw-in grooves, load-bearing platform's top interval is provided with a plurality of spacing draw-in grooves, spacing draw-in groove includes the cell body, the cell body include the cell wall with open-top's recess in the cell body, the recess internal fixation is provided with rubber buffer pad.
2. The double-deck traveling trolley according to claim 1, characterized in that:
the cross section of the groove is round or rectangular with an upper end open.
3. The double-deck traveling trolley according to claim 1, characterized in that:
the buffer rubber pad and the groove body are fixed on the bearing platform through a plurality of bolts arranged in the groove at intervals, and the bolts are all close to the groove wall.
4. The double-deck walking trolley according to claim 1, characterized in that:
the buffer rubber pad and the groove body are fixed on the supporting table through a plurality of bolts arranged in the groove at intervals, and the bolts are all close to the groove wall.
5. The double-deck traveling trolley according to any one of claims 1 to 4, characterized in that:
the upper frame comprises a second vertical supporting piece, the first end of the second vertical supporting piece is fixedly connected with the bottom of the lower frame, the second end of the second vertical supporting piece is fixedly connected with the bearing platform, an inclined support is connected between the second vertical supporting piece and the lower surface of the bottom of the bearing platform, and one end, connected with the lower surface of the bottom of the bearing platform, of the inclined support corresponds to the limiting clamping groove.
6. The ventilator parallel walking system comprises a main ventilator, a standby ventilator and an upper Y-shaped air duct,
the method is characterized in that:
the system further comprises the double-layer walking trolley according to any one of claims 1 to 5, wherein the main ventilator is fixedly arranged on the support platform in the third area, the standby ventilator is fixedly arranged on the bearing platform, the Y-shaped air duct is fixedly arranged on the support platform through a plurality of fixing door frames, a first air inlet end of the Y-shaped air duct is communicated with an air outlet end of the standby ventilator, a second air inlet end of the Y-shaped air duct is communicated with an air outlet end of the main ventilator, and the air outlet end of the Y-shaped air duct is communicated with one air duct.
7. A ventilator parallel walking system according to claim 6, wherein:
y type dryer includes main cylinder body and a branch barrel, the main cylinder body with the collineation of main blower sets up, be formed with an arc portion of bending on the branch barrel, the first end of branch barrel with the main cylinder body intercommunication, the second end of branch barrel does the first air inlet end of Y type dryer, the first end of main cylinder body does the second air inlet end of Y type dryer, the second air inlet end of main cylinder body along the length direction of frame extends to the third region down, the second end of main cylinder body does the air-out end of Y type dryer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123234850.2U CN217206528U (en) | 2021-12-21 | 2021-12-21 | Double-layer walking trolley and ventilator parallel walking system |
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| CN202123234850.2U CN217206528U (en) | 2021-12-21 | 2021-12-21 | Double-layer walking trolley and ventilator parallel walking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233360A (en) * | 2021-12-21 | 2022-03-25 | 中铁十九局集团有限公司勘察设计院分公司 | Double-layer walking trolley, ventilator parallel walking system and use method of ventilator parallel walking system |
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2021
- 2021-12-21 CN CN202123234850.2U patent/CN217206528U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233360A (en) * | 2021-12-21 | 2022-03-25 | 中铁十九局集团有限公司勘察设计院分公司 | Double-layer walking trolley, ventilator parallel walking system and use method of ventilator parallel walking system |
| CN114233360B (en) * | 2021-12-21 | 2024-10-18 | 中铁十九局集团有限公司勘察设计院分公司 | Double-layer traveling trolley, ventilator parallel traveling system and use method of ventilator parallel traveling system |
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