CN210545885U - Chain type heavy rail spraying and transferring production line - Google Patents
Chain type heavy rail spraying and transferring production line Download PDFInfo
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- CN210545885U CN210545885U CN201921303945.5U CN201921303945U CN210545885U CN 210545885 U CN210545885 U CN 210545885U CN 201921303945 U CN201921303945 U CN 201921303945U CN 210545885 U CN210545885 U CN 210545885U
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Abstract
The utility model discloses a chain heavy rail spraying and transporting production line, which comprises a chain steel moving mechanism and a spraying device, wherein the chain steel moving mechanism comprises a plurality of groups of zipper machines, two ends of each zipper machine are respectively provided with a ferry vehicle, each zipper machine comprises a supporting beam, two ends of each supporting beam are respectively provided with a ratchet wheel, and the ratchet wheels are meshed with chains; the chain includes end to end's interior link joint, heavy rail draw-in groove link joint, interior link joint and outer link joint in proper order, and the ferry push includes the crane, and the lift hydraulic cylinder is installed to the bottom of crane, and the flat push mechanism is installed to the crane top, and the flat push mechanism includes flat hydraulic cylinder and push rod that stretches, and the heavy rail draw-in groove has been placed to the other end upper surface of push rod, and the heavy rail is placed in the heavy rail draw-in groove. The utility model discloses a ferry vehicle moves the heavy rail and transports to the chain and move on the zip fastener machine of steel mechanism, draws the heavy rail draw-in groove link joint on the zip fastener machine to fix, support and move the fortune heavy rail, has reduced the wearing and tearing of heavy rail coating, has improved heavy rail coating quality, and area is little, and production efficiency is high.
Description
Technical Field
The utility model relates to a heavy rail production technical field, specific chain heavy rail spraying moves fortune production line that says so.
Background
Along with the rapid development of the China high-speed rail transportation industry, the requirements on the quality of heavy rails are higher and higher, the performance indexes of the heavy rails for high-speed rails, such as atmospheric corrosion resistance rate, insulation rate and the like, are continuously improved, the inner surfaces of the heavy rails in the operation period are required to be stable, corrosion or rust layer peeling cannot occur, and rust water pollutes railway track beds and the environment; meanwhile, the heavy rail is required to be insulated from the ground, so that the stability of a high-speed rail signal in transmission is ensured, and the interference of stray current is prevented.
Chinese patent with publication number CN207347857 discloses a full-automatic ballastless track spraying device for high-speed railway, which adopts two spraying mechanisms to realize full-covering operation of the surface of the full-automatic ballastless track. Chinese patent application No. CN201020505605.3 discloses a rail spray coating apparatus that employs a spray booth for housing a rail and a plurality of spray nozzles disposed about the rail and directly facing the rail in the spray booth. Chinese patent No. CN201811186727.8 discloses an automatic spraying device for steel rails, which adopts a housing moving relative to the steel rails, the housing is provided with an opening matching with the profile of the steel rails for the steel rails to pass through, and the housing is provided with a spraying nozzle for spraying the steel rails. The spraying device can not spray the bottom of the steel rail, and the bottom and the rail foot of the steel rail are easy to damage the coating.
The heavy rail needs to be sprayed twice and cured twice, and is produced in batch and continuously, so that a matched twice-curing rack and a finished product stacking rack are also needed in a heavy rail spraying system, and a heavy rail spraying production line can be formed. The heavy rail production line is large in size, the heavy rail needs to be carried for many times in the production process, the surface coating of the heavy rail is easily damaged, and the product quality is influenced; and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a chain heavy rail spraying moves fortune production line to it is bulky to solve current heavy rail production line, causes the damage of heavy rail surface coating easily, influences product quality, the lower problem of production efficiency.
In order to solve the technical problem, the utility model discloses the technical scheme who takes does:
a chain type heavy rail spraying and transferring production line comprises a plurality of chain type steel transferring mechanisms which are arranged on a straight line, wherein each chain type steel transferring mechanism comprises a plurality of groups of zipper machines which are arranged in parallel and are arranged on a rack, two ends of each zipper machine are respectively provided with a ferry vehicle, a spraying device is hung above the longitudinal moving central line of each ferry vehicle, each zipper machine comprises a supporting beam fixed on the rack, two ends of each supporting beam are respectively provided with a ratchet wheel, the ratchet wheels are meshed with the chains, and the ratchet wheels on one side of each zipper machine are connected with a motor through a speed reducer; the chain comprises inner chain plates, heavy rail clamping groove chain plates, inner chain plates and outer chain plates which are sequentially connected end to end through pin shafts, the heavy rail clamping groove chain plates on the same zipper machine are arranged at equal intervals, and the heavy rail clamping groove chain plates on the multiple groups of zipper machines are arranged in parallel lines; the ferry vehicle comprises a lifting frame perpendicular to the zipper machine, a lifting hydraulic cylinder is installed at the bottom of the lifting frame, a plurality of groups of horizontal pushing mechanisms are installed above the lifting frame and located between the ratchets of the two adjacent zipper machines, each horizontal pushing mechanism comprises a horizontal stretching hydraulic cylinder and a push rod, the horizontal stretching hydraulic cylinders are horizontally arranged, bases of the horizontal stretching hydraulic cylinders are fixed on one sides, away from the zipper machines, of the lifting frame, piston ends of the horizontal stretching hydraulic cylinders are connected with one ends of the push rods, heavy rail clamping grooves are placed on the upper surfaces of the other ends of the push rods, and heavy rails are placed in the heavy rail clamping grooves.
Preferably, the shape and size of the heavy rail clamping groove are matched with the shape and size of the heavy rail clamping groove chain plate.
Preferably, the middle part of the heavy rail clamping groove chain plate is provided with a V-shaped groove, and the V-shaped grooves of the heavy rail clamping groove chain plates of the two groups of zipper machines positioned at the two ends of the chain type steel moving mechanism are deep V-shaped grooves; v-shaped grooves of heavy rail clamping groove chain plates of the other groups of zipper machines are shallow V-shaped grooves; the middle part of the heavy rail clamping groove is provided with a V-shaped groove, the V-shaped grooves of the heavy rail clamping grooves at the two ends of the heavy rail are deep V-shaped grooves, and the V-shaped groove of the heavy rail clamping groove in the middle of the heavy rail is a shallow V-shaped groove.
Preferably, the ratchets of two adjacent zipper machines are connected with each other through a transmission connecting rod.
Preferably, the push rod is a telescopic rod and comprises an external connecting rod and an internal connecting rod which are mutually sleeved.
Preferably, the lifting frame comprises two support connecting rods with the middle parts hinged with each other, and a balance spring is installed at the hinged position of each support connecting rod.
Preferably, the spraying devices are at least two groups, and each group of spraying devices comprises a plurality of spray guns and moving rails which are arranged in a C shape and are respectively suspended above the two ferry vehicles.
Preferably, the number of the zipper machines is determined according to the length of the heavy rail to be painted.
Preferably, the production line comprises at least two chain type steel moving mechanisms.
The utility model discloses a working process does:
the crane hoists a heavy rail to be sprayed to the upper side of the ferry vehicle on the input end side of the chain type steel moving mechanism, aligns a heavy rail clamping groove arranged at the front end of the push rod, places the heavy rail in a V-shaped groove of the heavy rail clamping groove, enables a rail foot of the heavy rail to face upwards, and clamps a rail head in the V-shaped groove. The ferry vehicle conveys the heavy rail into the spraying device, the spraying device is started, and the rail feet, the rail waist and other parts of the heavy rail are sprayed once, wherein the thickness of the coating is 25-35 mu m.
After the primary spraying is finished, the heavy rail is transported to the input end of the chain type steel moving mechanism by the ferry vehicle, the flat pushing mechanism of the ferry vehicle is positioned between the ratchet wheels of two adjacent zipper machines, the lifting hydraulic cylinder of the ferry vehicle is started, and the lifting frame is lifted to a position slightly higher than the zipper machines; starting a motor, driving a ratchet wheel to rotate by the motor, and rotating the heavy rail clamping groove chain plate; meanwhile, the horizontal extension hydraulic cylinder pushes the push rod to extend forwards, the heavy rail is pushed to the position near the heavy rail clamping groove chain plate, the heavy rail clamping groove chain plate supports the heavy rail into a central V-shaped groove in the rotating process, the retraction of the lifting hydraulic cylinder of the ferry vehicle is controlled, and the heavy rail gradually falls into the heavy rail drawing groove chain plate; the heavy rail is supported by the heavy rail clamping groove chain plate to translate along the running direction of the zipper machine, and primary curing is carried out; and meanwhile, the horizontal extending hydraulic cylinder of the ferry vehicle at the input end side of the chain type steel moving mechanism retracts to the original position to prepare for moving a second heavy rail.
The heavy rail after the primary curing is transferred to the output end of the chain type steel moving mechanism, the lifting hydraulic cylinder of the ferry vehicle on the output end side of the chain type steel moving mechanism lifts the lifting frame to the position near the zipper machines, the horizontally extending hydraulic cylinder pushes the push rod to extend forwards, the heavy rail clamping groove at the front end of the push rod is positioned between the ratchet wheels of two adjacent zipper machines, the heavy rail gradually falls into the V-shaped groove of the heavy rail clamping groove along with the rotation of the ratchet wheels, the horizontally extending hydraulic cylinder and the lifting hydraulic cylinder retract in sequence, the heavy rail reaches a low position along with the lifting frame, the ferry vehicle transfers the heavy rail to a secondary spraying device, after secondary spraying is carried out, the heavy rail is transferred to the input end of the chain type steel moving mechanism for secondary curing again, and the secondary curing and transferring operations are completed by.
The utility model has the advantages that:
(1) the utility model transfers the heavy rail to the zipper machine of the chain type steel transfer mechanism through the ferry vehicle, the heavy rail clamping groove chain plate is arranged on the zipper machine to fix and support the heavy rail, the coating solidification of the heavy rail in the transfer process is completed, the solidified heavy rail is transported to the next process by the lifting of the ferry vehicle, the lifting times of the heavy rail are reduced, the abrasion of the coating of the heavy rail is reduced, and the coating quality of the heavy rail is improved; the utility model has reasonable structural design, neat planning, small occupied area and high production efficiency;
(2) the utility model discloses the shape size looks adaptation of well heavy rail draw-in groove and heavy rail draw-in groove link joint, the heavy rail draw-in groove that sets up at the both ends of heavy rail sets up dark V type groove with heavy rail draw-in groove link joint, plays the fixed effect to the tip of heavy rail, and the heavy rail draw-in groove at heavy rail middle part sets up shallow V type groove with heavy rail draw-in groove link joint, plays the supporting role to the middle part of heavy rail, has guaranteed the coating quality in the middle of the heavy rail and rail waist position, has prevented the downwarping deformation of heavy rail simultaneously;
(3) the ratchet wheels of the zipper machines are connected through the transmission connecting rod, and after the motor is started, the zipper machines run simultaneously, so that the synchronous operation of heavy rail clamping groove chain plates on the same horizontal line is ensured, and the stability of the heavy rail moving process is ensured;
(4) the lifting frame of the utility model is composed of two mutually hinged supporting connecting rods, and a balance spring is arranged at the hinge of the supporting connecting rods, the balance spring ensures the levelness of the lifting frame, and ensures the stability of the heavy rail in the horizontal pushing process;
(5) the utility model discloses a ferry vehicle passes through the height of lift hydraulic cylinder adjustment crane, the fortune and the switching of being convenient for heavily the rail.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the structure of the zipper machine of FIG. 1;
FIG. 3 is a schematic end view of the ferry vehicle of FIG. 1;
FIG. 4 is a diagram illustrating the usage status of the present invention;
in the figure: 1. the ferry vehicle comprises a ferry vehicle body 2, a spraying device 3, a lifting hydraulic cylinder 4, a lifting frame 5, a horizontal pushing mechanism 6, a horizontal stretching hydraulic cylinder 7, a push rod 8, an external connecting rod 9, an internal connecting rod 10, a heavy rail 11, an inner chain plate 12, a chain type steel moving mechanism 13, a zipper machine 14, a supporting beam 15, an outer chain plate 16, a ratchet wheel 17, a transmission connecting rod 18, a speed reducer 19, a motor 20, a chain 21, a heavy rail clamping groove chain plate 22, a heavy rail clamping groove 23, a supporting connecting rod 24 and a balance spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the chain type heavy rail spraying and transferring production line comprises two chain type steel transferring mechanisms 12 arranged on a straight line, each chain type steel transferring mechanism 12 comprises 8 groups of zipper machines 13 arranged in parallel on a frame, two ends of each zipper machine 13 are respectively provided with a ferry vehicle 1, a spraying device 2 is hung above a longitudinal moving center line of each ferry vehicle 1, each spraying device 2 is hung above each chain type steel transferring mechanism 12, each zipper machine 13 comprises a supporting beam 14 fixed on the frame, two ends of each supporting beam 14 are respectively provided with a ratchet wheel 16, each ratchet wheel 16 is meshed with a chain 20, each ratchet wheel 16 on one side of each zipper machine 13 is connected with a motor 19 through a speed reducer 18, and the ratchet wheels 16 of two adjacent zipper machines 13 are connected with each other through a transmission connecting rod 17. The chain 20 comprises inner chain plates 11, heavy rail clamping groove chain plates 21, inner chain plates 11 and outer chain plates 15 which are sequentially connected end to end through pin shafts, the heavy rail clamping groove chain plates 21 on the same zipper machine 13 are arranged at equal intervals, and the heavy rail clamping groove chain plates 21 on 8 groups of zipper machines 13 are arranged in parallel lines; ferry vehicle 1 includes and draws zipper machine 13 looks vertically crane 4, lift hydraulic cylinder 3 is installed to crane 4's bottom, 7 flat push mechanism 5 of group are installed to crane 4 top, flat push mechanism 5 is located between two adjacent zipper machine 13's the ratchet 16, flat push mechanism 5 includes the flat hydraulic cylinder 6 and the push rod 7 of stretching that the level set up, the base of flat hydraulic cylinder 6 is fixed in crane 4 one side of keeping away from zipper machine 13, the piston end of flat hydraulic cylinder 6 is connected with the one end of push rod 7, heavy rail draw-in groove 22 has been placed to the other end upper surface of push rod 7, heavy rail 10 is placed in heavy rail draw-in groove 22.
The heavy rail clamping groove 22 is matched with the heavy rail clamping groove chain plate 21 in shape and size. The middle part of the heavy rail clamping groove chain plate 21 is provided with a V-shaped groove, and the V-shaped grooves of the heavy rail clamping groove chain plates 21 of the two groups of zipper machines 13 positioned at the two ends of the chain type steel moving mechanism 12 are deep V-shaped grooves; the V-shaped grooves of the heavy rail clamping groove chain plates 21 of the other 6 groups of zipper machines 13 are shallow V-shaped grooves; the middle part of the heavy rail clamping groove 22 is provided with a V-shaped groove, the V-shaped grooves of the heavy rail clamping grooves 22 at the two ends of the heavy rail 10 are deep V-shaped grooves, and the V-shaped groove of the heavy rail clamping groove 22 in the middle of the heavy rail 10 is a shallow V-shaped groove.
The push rod 7 is a telescopic rod and comprises an external connecting rod 8 and an internal connecting rod 9 which are mutually sleeved.
The lifting frame 4 comprises two support connecting rods 23 with the middle parts hinged with each other, and a balance spring 24 is arranged at the hinged part of the support connecting rods 23.
The spraying devices 2 are divided into two groups, each group of spraying devices 2 comprises a plurality of spray guns and moving rails which are arranged in a C shape, and the spray guns and the moving rails are respectively suspended above the two ferry vehicles.
The number of the zipper machines 13 is determined according to the length of the heavy rail 10 to be painted.
The production line comprises at least 2 chain type steel moving mechanisms 12.
The utility model discloses a working process does:
the crane hoists a heavy rail 10 to be sprayed to the upper side of the ferry vehicle 1 at the input end side of the chain type steel moving mechanism 12, aligns to a heavy rail clamping groove 22 arranged at the front end of the push rod 7, places the heavy rail 10 in a V-shaped groove of the heavy rail clamping groove 22, the rail foot of the heavy rail 10 faces upwards, and the rail head is clamped in the V-shaped groove. The ferry vehicle 1 conveys the heavy rail 10 into the spraying device 2, the spraying device 2 is started, and the rail foot, the rail waist and other parts of the heavy rail 10 are sprayed once, wherein the thickness of the coating is 25-35 mu m.
After the primary spraying is finished, the ferry vehicle 1 transports the heavy rail 10 to the input end of the chain type steel moving mechanism 12, so that the flat push mechanism 7 of the ferry vehicle 1 is positioned between the ratchet wheels 16 of two adjacent zipper machines 13, the lifting hydraulic cylinder 3 of the ferry vehicle 1 is started, and the lifting frame 4 is lifted to a position slightly higher than the zipper machines 13; starting the motor 9, driving the ratchet wheel 16 to rotate by the motor 9, and rotating the heavy rail slot chain plate 21 along with the rotation; meanwhile, the horizontal extension hydraulic cylinder 6 pushes the push rod 7 to extend forwards, the heavy rail 10 is pushed to the position close to the heavy rail clamping groove chain plate 21, the heavy rail clamping groove chain plate 21 supports the heavy rail 10 to a central V-shaped groove in the rotating process, the lifting hydraulic cylinder 3 of the ferry vehicle 1 is controlled to retract, and the heavy rail 10 gradually falls into the heavy rail pull groove chain plate 21; the heavy rail 10 is supported by a heavy rail clamping groove chain plate 21 to translate along the running direction of the zipper machine 13, and primary curing is carried out; meanwhile, the horizontal extending hydraulic cylinder 6 of the ferry vehicle 1 at the input end side of the chain type steel moving mechanism 12 retracts to the original position to prepare for moving a second heavy rail 10.
The heavy rail 10 which is solidified for the first time is transferred to the output end of the chain type steel transferring mechanism 12, the lifting hydraulic cylinder 3 of the ferry vehicle 1 at the output end side of the chain type steel transferring mechanism 12 lifts the lifting frame 4 to the position near the zipper machines 13, the horizontal hydraulic cylinder 6 pushes the push rod 7 to extend forwards, the heavy rail clamping groove 22 at the front end of the push rod 7 is positioned between the ratchet wheels 16 of the two adjacent zipper machines 13, the heavy rail 10 gradually falls into the V-shaped groove of the heavy rail clamping groove 22 along with the rotation of the ratchet wheels 16, the horizontal hydraulic cylinder 6 and the lifting hydraulic cylinder 3 retract in sequence, the heavy rail 10 reaches a low position along with the lifting frame 4, the ferry vehicle 1 transfers the heavy rail 10 to the secondary spraying device 2, after secondary spraying, the heavy rail is transferred to the input end of the chain type steel transferring mechanism 12 which is solidified for the second time, and the secondary solidifying and transferring operations are.
The utility model transfers the heavy rail to the zipper machine of the chain type steel transfer mechanism through the ferry vehicle, the heavy rail clamping groove chain plate is arranged on the zipper machine to fix and support the heavy rail, the coating solidification of the heavy rail in the transfer process is completed, the solidified heavy rail is transported to the next process by the lifting of the ferry vehicle, the lifting times of the heavy rail are reduced, the abrasion of the coating of the heavy rail is reduced, and the coating quality of the heavy rail is improved; the utility model has the advantages of reasonable design, the planning is neat, and area is little, and production efficiency is high.
Claims (9)
1. The utility model provides a chain heavy rail spraying moves fortune production line, this production line include that several arrange chain on a straight line move steel mechanism (12), its characterized in that: the chain type steel moving mechanism (12) comprises a plurality of groups of zipper machines (13) which are arranged in parallel and installed on a rack, two ends of each zipper machine (13) are respectively provided with a ferry vehicle (1), a spraying device (2) is hung above a longitudinal moving central line of each ferry vehicle (1), each zipper machine (13) comprises a supporting beam (14) fixed on the rack, two ends of each supporting beam (14) are respectively provided with a ratchet wheel (16), each ratchet wheel (16) is meshed with a chain (20), and each ratchet wheel (16) on one side of each zipper machine (13) is connected with a motor (19) through a speed reducer (18); the chain (20) comprises inner chain plates (11), heavy rail clamping groove chain plates (21), inner chain plates (11) and outer chain plates (15) which are sequentially connected end to end through pin shafts, the heavy rail clamping groove chain plates (21) on the same zipper machine (13) are arranged at equal intervals, and the heavy rail clamping groove chain plates (21) on the multiple groups of zipper machines (13) are arranged in parallel lines; ferry push car (1) include with draw zipper machine (13) looks vertically crane (4), lift hydraulic cylinder (3) are installed to the bottom of crane (4), a plurality of flat push mechanism (5) are installed to crane (4) top, flat push mechanism (5) are located between ratchet (16) of two adjacent draw zipper machines (13), flat push mechanism (5) are including flat hydraulic cylinder (6) and push rod (7) of stretching that the level set up, the base of flat hydraulic cylinder (6) of stretching is fixed in crane (4) one side of keeping away from draw zipper machine (13), the piston end of flat hydraulic cylinder (6) of stretching is connected with the one end of push rod (7), heavy rail draw-in groove (22) have been placed to the other end upper surface of push rod (7), heavy rail (10) are placed in heavy rail draw-in groove (22).
2. The chain type heavy rail spraying and transferring production line of claim 1, characterized in that: the heavy rail clamping groove (22) is matched with the heavy rail clamping groove chain plate (21) in shape and size.
3. The chain type heavy rail spraying and transferring production line of claim 1 or 2, characterized in that: the middle part of the heavy rail clamping groove chain plate (21) is provided with a V-shaped groove, and the V-shaped grooves of the heavy rail clamping groove chain plates (21) of the two groups of zipper machines (13) positioned at the two ends of the chain type steel moving mechanism (12) are deep V-shaped grooves; v-shaped grooves of heavy rail clamping groove chain plates (21) of the other groups of zipper machines (13) are shallow V-shaped grooves; the middle part of the heavy rail clamping groove (22) is provided with a V-shaped groove, the V-shaped grooves of the heavy rail clamping grooves (22) at the two ends of the heavy rail (10) are deep V-shaped grooves, and the V-shaped groove of the heavy rail clamping groove (22) in the middle of the heavy rail (10) is a shallow V-shaped groove.
4. The chain type heavy rail spraying and transferring production line of claim 3, characterized in that: the ratchet wheels (16) of two adjacent zipper machines (13) are connected with each other through a transmission connecting rod (17).
5. The chain type heavy rail spraying and transferring production line of claim 4, characterized in that: the push rod (7) is a telescopic rod and comprises an external connecting rod (8) and an internal connecting rod (9) which are mutually sleeved.
6. The chain type heavy rail spraying and transferring production line of claim 5, characterized in that: the lifting frame (4) comprises two supporting connecting rods (23) with the middle parts hinged with each other, and balancing springs (24) are installed at the hinged parts of the supporting connecting rods (23).
7. The chain type heavy rail spraying and transferring production line of claim 6, characterized in that: the spraying devices (2) are at least two groups, and each group of spraying devices (2) comprises a plurality of spray guns and moving rails which are arranged in a C shape and are respectively hung above the two ferry vehicles.
8. The chain type heavy rail spraying and transferring production line of claim 7, characterized in that: the number of the zipper machines (13) is determined according to the length of the heavy rail (10) needing to be sprayed.
9. The chain type heavy rail spraying and transferring production line of claim 1, characterized in that: the production line comprises at least two chain type steel moving mechanisms (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921303945.5U CN210545885U (en) | 2019-08-13 | 2019-08-13 | Chain type heavy rail spraying and transferring production line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921303945.5U CN210545885U (en) | 2019-08-13 | 2019-08-13 | Chain type heavy rail spraying and transferring production line |
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| Publication Number | Publication Date |
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| CN210545885U true CN210545885U (en) | 2020-05-19 |
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| CN201921303945.5U Active CN210545885U (en) | 2019-08-13 | 2019-08-13 | Chain type heavy rail spraying and transferring production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369192A (en) * | 2019-08-13 | 2019-10-25 | 攀枝花市贝特尔科技有限公司 | Chain type heavy rail sprays movement production line |
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2019
- 2019-08-13 CN CN201921303945.5U patent/CN210545885U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369192A (en) * | 2019-08-13 | 2019-10-25 | 攀枝花市贝特尔科技有限公司 | Chain type heavy rail sprays movement production line |
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