CN111421677A - Portable railway sleeper marking machine - Google Patents
Portable railway sleeper marking machine Download PDFInfo
- Publication number
- CN111421677A CN111421677A CN202010244277.4A CN202010244277A CN111421677A CN 111421677 A CN111421677 A CN 111421677A CN 202010244277 A CN202010244277 A CN 202010244277A CN 111421677 A CN111421677 A CN 111421677A
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- China
- Prior art keywords
- guide rail
- axis guide
- roller
- marking machine
- sliding
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/003—Mechanical surface treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/005—Devices for the automatic drive or the program control of the machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mining & Mineral Resources (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the technical field of railway sleeper marking, and discloses a portable railway sleeper marking machine which comprises a moving seat arranged on an X-axis guide rail in a sliding mode, wherein a sliding plate which moves up and down is arranged on the moving seat, a rotating main shaft with a graver arranged at the lower end is arranged on the sliding plate, two ends of the X-axis guide rail are connected to a left Y-axis guide rail and a right Y-axis guide rail in a sliding mode, the moving seat is arranged on the X-axis guide rail in a sliding mode, the X-axis guide rail and the Y-axis guide rail jointly form a support, a front row of idler wheels and a rear row of idler wheels are arranged at the bottom end of the support, annular convex parts are arranged on the circumferential surface of the idler wheels. The invention can realize the purpose of permanently marking any position of the sleeper, and solves the problems that the mark code marked by the existing marking machine cannot be permanently stored and the efficiency is low by using the graver and the roller.
Description
Technical Field
The invention relates to the technical field of railway sleeper marking, and discloses a portable railway sleeper marking machine.
Background
In the coding mode, because paint is attached to the surface of the sleeper, the codes are unclear or directly disappear after a period of time due to wind blowing or rain, and the sleeper needs to be coded again manually; moreover, due to the fact that the paint is used, workers need to be in continuous contact with the paint in the coding process, the paint contains various substances harmful to human bodies, health of the workers is affected, a lot of workers adsorb a large amount of paint in noses of the sleepers after the sleepers are coded through paint spraying, accordingly, snivel is red, respiratory tracts of the workers are affected, coding speed is low due to manual operation, labor intensity of the workers is high, and construction period progress is affected.
Disclosure of Invention
Based on the above problems, the present invention provides a portable railway sleeper marking machine. The invention can realize the purpose of permanently marking any position of the sleeper and improving the marking efficiency, and solves the problems that the mark code marked by the existing marking machine cannot be permanently stored and the efficiency is low by using the graver and the roller.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a portable railway sleeper marking machine, sets up the removal seat on X axle guide rail including sliding, be equipped with the slide that reciprocates on the removal seat, be equipped with the rotation main shaft of lower extreme installation burin on the slide, the both ends sliding connection of X axle guide rail is on two left and right Y axle guide rails, it slides and sets up on X axle guide rail to remove the seat, X axle guide rail, Y axle guide rail constitute the support jointly, be equipped with control on the support remove the seat and rotate the control box of main shaft, the support bottom is provided with two rows of gyro wheels in front and back, be equipped with annular bulge on the periphery of gyro wheel, distance between two rows of bulges in front and back equals the distance between two rail lateral surfaces of railway.
In the invention, when a sleeper of a railway is marked, a marking machine is firstly placed on a rail, a roller of the marking machine is positioned on the rail, the rail is clamped between a front row of convex parts and a rear row of convex parts on the roller, then the machine is moved to a marking position according to working requirements, a marking program is input into a control box, the marking machine is started, and a rotating main shaft on the marking machine drives a cutter to rotate under the instruction of the control box; the movable seat is matched with the rotating main shaft according to the instruction to move in the X-axis direction and the Y-axis direction, and patterns or numbers to be marked are engraved on sleepers of the railway; therefore, marks are marked on the sleepers, the marks can be processed in a negative text or a positive text according to actual requirements, and the marks are not easy to disappear. The invention can realize the purpose of permanently marking any position of the sleeper and improving the marking efficiency, and solves the problems that the mark code marked by the existing marking machine cannot be permanently stored and the efficiency is low by using the graver and the roller.
As a preferable mode, a roller braking device corresponding to the roller is arranged on the support, the roller braking device comprises a fixed plate located on one side surface of the roller and a movable plate located on the other side surface of the roller, an air cylinder with a telescopic rod is arranged on the fixed plate, the movable plate is connected to the top end of the telescopic rod, air outlets and air inlets of all the air cylinders are respectively and uniformly connected with a hand-operated valve of the five-position tee joint through two air pipes, and a main air pipe of the hand-operated valve is connected with an air pump.
As a preferred mode, a water tank is arranged on the support, a water pump is arranged in the water tank, the water pump is connected with one end of a water pipe, and the other end of the water pipe is aligned to the graver through a support piece arranged on the rotating main shaft.
As a preferable mode, a manual controller is electrically connected to the control box.
As a preferable mode, two ends of the X-axis guide rail are slidably connected with the Y-axis guide rail through sliding wheels, and a sliding groove matched with the sliding wheels is arranged on the Y-axis guide rail.
Preferably, the roller is made of a rubber material or a rubber layer is provided on a circumferential surface of the roller.
In a preferable mode, the water tank is a water tank with an opening at the upper end and without a cover, and a water outlet valve is arranged at the lower part of the side wall of the water tank.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention can realize the purpose of permanently marking any position of the sleeper and improving the marking efficiency, and solves the problems that the mark code marked by the existing marking machine cannot be permanently stored and the efficiency is low by using the graver and the roller.
(2) The invention brakes all the rollers by connecting the pneumatic clamping plate and the pneumatic valve into an integral pneumatic system, so that all the rollers are in a braking state when in use, the whole machine is prevented from moving due to vibration, and all the rollers are controlled by one valve switch, so that the control operation is simple and convenient.
(3) According to the invention, the water tank is arranged, the pump is arranged in the water tank, and water of the pump is aligned to the graver through the water pipe, so that on one hand, the water in the water tank can cool the graver, and on the other hand, the water flows down along the graver, thereby preventing the graver from generating dust during working.
(4) According to the marking device, the manual controller is connected in the control box, so that the graver can be roughly positioned before marking, and the working efficiency is improved.
(5) The two ends of the X-axis guide rail are connected with the Y-axis guide rail in a sliding mode through the sliding wheels, and the sliding grooves matched with the sliding wheels are formed in the Y-axis guide rail, so that sliding friction of the X-axis guide rail on the Y-axis guide rail is reduced.
(6) The rubber layer is arranged on the circumferential surface of the roller or the roller made of rubber materials, so that the friction between the roller and a train rail is increased, and the roller is prevented from sliding randomly when the position is aligned.
(7) According to the invention, the water tank is arranged to be a cover-free water tank with an opening at the upper end, the water outlet valve is arranged at the lower part of the side wall of the water tank, so that water can be conveniently added into the water tank, water can be conveniently taken from the water tank when the machine works, and emergency situations can be handled, the water valve at the lower part of the side wall of the bottom of the water tank can timely drain water in the water tank after the machine is used, the weight of the machine is reduced, and the.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a roller according to the present invention;
FIG. 3 is a schematic structural diagram of the movable base of the present invention;
FIG. 4 is a schematic view of the structure and position of the sink of the present invention;
FIG. 5 is a schematic structural view of the pneumatic brake apparatus of the present invention;
fig. 6 is a schematic view of the position of the sliding wheel in the present invention.
Wherein, 1, X-axis guide rail; 2. a movable seat; 3. a slide plate; 4. engraving; 5. rotating the main shaft; 6. a Y-axis guide rail; 7. a support; 8. a control box; 9. a roller; 10. a projection; 11. a fixing plate; 12. a movable plate; 13. a telescopic rod; 14. a cylinder; 15. a five-position three-way hand-operated valve; 16. a main air pipe; 17. an air pump; 18. a water tank; 19. a water pump; 20. a water pipe; 21. a manual controller; 22. a sliding wheel; 23. a chute; 24. and (4) a water outlet valve.
Detailed Description
Controller embodiment 1:
referring to fig. 1-5, a portable railway sleeper marking machine, includes the removal seat 2 that slides and sets up on X axle guide rail 1, be equipped with the slide 3 that reciprocates on removing the seat 2, be equipped with the rotation main shaft 5 of lower extreme installation burin 4 on the slide 3, the both ends sliding connection of X axle guide rail 1 is on two left and right Y axle guide rails 6, remove seat 2 and slide and set up on X axle guide rail 1, Y axle guide rail 2 constitute support 7 jointly, be equipped with the control box 8 of control remove seat 2 and rotation main shaft 5 on the support 7, support 7 bottom is provided with two rows of gyro wheels 9 in front and back, be equipped with annular bulge 10 on the periphery of gyro wheel 9, the distance between two rows of bulge 10 in front and back equals the distance between two rail lateral surfaces of railway.
In the invention, when a sleeper of a railway is marked, a marking machine is firstly placed on a rail, a roller 9 of the marking machine is positioned on the rail, the rail is clamped between a front row of convex parts and a rear row of convex parts 10 on the roller 9, then the machine is moved to a marking position according to working requirements, a marking program is input into a control box, the marking machine is started, and a rotating main shaft 5 on the marking machine drives a nicking tool 4 to rotate under the instruction of the control box 8; the movable seat 2 is matched with the rotating main shaft 5 according to instructions to move in the X-axis direction and the Y-axis direction, and patterns or numbers to be marked are engraved on sleepers of the railway; therefore, marks are marked on the sleepers, the marks can be processed in a negative text or a positive text according to actual requirements, and the marks are not easy to disappear. The invention can realize the purpose of permanently marking any position of the sleeper and improving the marking efficiency, and solves the problems that the mark code marked by the existing marking machine cannot be permanently stored and the efficiency is low by using the graver and the roller.
Example 2:
referring to fig. 1-5, a portable railway sleeper marking machine, includes the removal seat 2 that slides and sets up on X axle guide rail 1, be equipped with the slide 3 that reciprocates on removing the seat 2, be equipped with the rotation main shaft 5 of lower extreme installation burin 4 on the slide 3, the both ends sliding connection of X axle guide rail 1 is on two left and right Y axle guide rails 6, remove seat 2 and slide and set up on X axle guide rail 1, Y axle guide rail 2 constitute support 7 jointly, be equipped with the control box 8 of control remove seat 2 and rotation main shaft 5 on the support 7, support 7 bottom is provided with two rows of gyro wheels 9 in front and back, be equipped with annular bulge 10 on the periphery of gyro wheel 9, the distance between two rows of bulge 10 in front and back equals the distance between two rail lateral surfaces of railway.
The roller braking device is characterized in that a roller braking device corresponding to the roller 9 is arranged on the support 7, the roller braking device comprises a fixed plate 11 located on one side face of the roller 9 and a movable plate 12 located on the other side face of the roller 9, an air cylinder 14 with a telescopic rod 13 is arranged on the fixed plate 11, the movable plate 12 is connected to the top end of the telescopic rod 13, air outlets and air inlets of all the air cylinders 14 are respectively and uniformly connected with a five-position three-way hand-operated valve 15 through two air pipes, and a main air pipe 16 of the hand-operated valve 15 is connected with an air pump.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
Example 3:
referring to fig. 1-5, a portable railway sleeper marking machine, includes the removal seat 2 that slides and sets up on X axle guide rail 1, be equipped with the slide 3 that reciprocates on removing the seat 2, be equipped with the rotation main shaft 5 of lower extreme installation burin 4 on the slide 3, the both ends sliding connection of X axle guide rail 1 is on two left and right Y axle guide rails 6, remove seat 2 and slide and set up on X axle guide rail 1, Y axle guide rail 2 constitute support 7 jointly, be equipped with the control box 8 of control remove seat 2 and rotation main shaft 5 on the support 7, support 7 bottom is provided with two rows of gyro wheels 9 in front and back, be equipped with annular bulge 10 on the periphery of gyro wheel 9, the distance between two rows of bulge 10 in front and back equals the distance between two rail lateral surfaces of railway.
A water tank 18 is arranged on the support 7, a water pump 19 is arranged in the water tank 18, the water pump 19 is connected with one end of a water pipe 20, and the other end of the water pipe 20 is aligned to the nicking tool through a support piece 21 arranged on the rotating main shaft 5.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
Example 4:
referring to fig. 1-5, a portable railway sleeper marking machine, includes the removal seat 2 that slides and sets up on X axle guide rail 1, be equipped with the slide 3 that reciprocates on removing the seat 2, be equipped with the rotation main shaft 5 of lower extreme installation burin 4 on the slide 3, the both ends sliding connection of X axle guide rail 1 is on two left and right Y axle guide rails 6, remove seat 2 and slide and set up on X axle guide rail 1, Y axle guide rail 2 constitute support 7 jointly, be equipped with the control box 8 of control remove seat 2 and rotation main shaft 5 on the support 7, support 7 bottom is provided with two rows of gyro wheels 9 in front and back, be equipped with annular bulge 10 on the periphery of gyro wheel 9, the distance between two rows of bulge 10 in front and back equals the distance between two rail lateral surfaces of railway.
The roller braking device is characterized in that a roller braking device corresponding to the roller 9 is arranged on the support 7, the roller braking device comprises a fixed plate 11 located on one side face of the roller 9 and a movable plate 12 located on the other side face of the roller 9, an air cylinder 14 with a telescopic rod 13 is arranged on the fixed plate 11, the movable plate 12 is connected to the top end of the telescopic rod 13, air outlets and air inlets of all the air cylinders 14 are respectively and uniformly connected with a five-position three-way hand-operated valve 15 through two air pipes, and a main air pipe 16 of the hand-operated valve 15 is connected with an air pump.
The roller 9 is made of rubber material or the circumferential surface of the roller 9 is provided with a rubber layer.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
Example 5:
referring to fig. 1-5, a portable railway sleeper marking machine, includes the removal seat 2 that slides and sets up on X axle guide rail 1, be equipped with the slide 3 that reciprocates on removing the seat 2, be equipped with the rotation main shaft 5 of lower extreme installation burin 4 on the slide 3, the both ends sliding connection of X axle guide rail 1 is on two left and right Y axle guide rails 6, remove seat 2 and slide and set up on X axle guide rail 1, Y axle guide rail 2 constitute support 7 jointly, be equipped with the control box 8 of control remove seat 2 and rotation main shaft 5 on the support 7, support 7 bottom is provided with two rows of gyro wheels 9 in front and back, be equipped with annular bulge 10 on the periphery of gyro wheel 9, the distance between two rows of bulge 10 in front and back equals the distance between two rail lateral surfaces of railway.
The control box 8 is electrically connected with a manual controller 22.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
Example 6:
referring to fig. 1-6, a portable railway sleeper marking machine, includes the removal seat 2 that slides and sets up on X axle guide rail 1, be equipped with the slide 3 that reciprocates on removing the seat 2, be equipped with the rotation main shaft 5 of lower extreme installation burin 4 on the slide 3, the both ends sliding connection of X axle guide rail 1 is on two left and right Y axle guide rails 6, remove seat 2 and slide and set up on X axle guide rail 1, Y axle guide rail 2 constitute support 7 jointly, be equipped with the control box 8 of control remove seat 2 and rotation main shaft 5 on the support 7, support 7 bottom is provided with two rows of gyro wheels 9 in front and back, be equipped with annular bulge 10 on the periphery of gyro wheel 9, the distance between two rows of bulge 10 in front and back equals the distance between two rail lateral surfaces of railway.
The roller braking device is characterized in that a roller braking device corresponding to the roller 9 is arranged on the support 7, the roller braking device comprises a fixed plate 11 located on one side face of the roller 9 and a movable plate 12 located on the other side face of the roller 9, an air cylinder 14 with a telescopic rod 13 is arranged on the fixed plate 11, the movable plate 12 is connected to the top end of the telescopic rod 13, air outlets and air inlets of all the air cylinders 14 are respectively and uniformly connected with a five-position three-way hand-operated valve 15 through two air pipes, and a main air pipe 16 of the hand-operated valve 15 is connected with an air pump.
A water tank 18 is arranged on the support 7, a water pump 19 is arranged in the water tank 18, the water pump 19 is connected with one end of a water pipe 20, and the other end of the water pipe 20 is aligned to the nicking tool through a support piece 21 arranged on the rotating main shaft 5.
Two ends of the X-axis guide rail 1 are connected with the Y-axis guide rail 6 in a sliding mode through sliding wheels 23, and sliding grooves 24 matched with the sliding wheels 23 are formed in the Y-axis guide rail 6.
The water tank 18 is a water tank with an opening at the upper end and without a cover, and a water outlet valve is arranged at the lower part of the side wall of the water tank 18.
Other parts of this embodiment are the same as those of the above embodiment, and are not described herein again.
The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only used for clearly illustrating the verification process of the present invention, and are not used for limiting the scope of the present invention, which is defined by the claims, and all the equivalent structural changes made by using the contents of the description and the drawings of the present invention should be included in the scope of the present invention.
Claims (7)
1. A portable railway sleeper marking machine comprises a movable seat (2) which is arranged on an X-axis guide rail (1) in a sliding way, a sliding plate (3) moving up and down is arranged on the moving seat (2), a rotating main shaft (5) with a nicking tool (4) arranged at the lower end is arranged on the sliding plate (3), two ends of the X-axis guide rail (1) are connected on the left and right Y-axis guide rails (6) in a sliding way, the movable seat (2) is arranged on the X-axis guide rail (1) in a sliding manner, the X-axis guide rail (1) and the Y-axis guide rail (2) jointly form a support (7), a control box (8) for controlling the moving seat (2) and the rotating main shaft (5) is arranged on the bracket (7), the bottom end of the bracket (7) is provided with a front row of idler wheels (9) and a rear row of idler wheels (9), the circumferential surface of the idler wheels (9) is provided with an annular bulge part (10), the distance between the front row of convex parts (10) and the rear row of convex parts is equal to the distance between the outer sides of two rails of a railway.
2. The portable railway crosstie marking machine of claim 1, wherein: the roller braking device is characterized in that a roller braking device corresponding to the roller (9) is arranged on the support (7), the roller braking device comprises a fixing plate (11) located on one side face of the roller (9) and a movable plate (12) located on the other side face of the roller (9), an air cylinder (14) with a telescopic rod (13) is arranged on the fixing plate (11), the movable plate (12) is connected to the top end of the telescopic rod (13), air outlets and air inlets of all the air cylinders (14) are respectively and uniformly connected with a five-position three-way hand-operated valve (15) through two air pipes, and a main air pipe (16) of the hand-operated valve (15) is connected with an air pump (17).
3. The portable railway crosstie marking machine of claim 1, wherein: the support (7) is provided with a water tank (18), a water pump (19) is arranged in the water tank (18), the water pump (19) is connected with one end of a water pipe (20), and the other end of the water pipe (20) is aligned to the nicking tool (4) through a support piece (21) arranged on the rotating main shaft (5).
4. The portable railway crosstie marking machine of claim 1, wherein: and a manual controller (22) is electrically connected in the control box (8).
5. The portable railway crosstie marking machine of claim 1, wherein: the two ends of the X-axis guide rail (1) are in sliding connection with the Y-axis guide rail (6) through sliding wheels (23), and sliding grooves (24) matched with the sliding wheels (23) are formed in the Y-axis guide rail (6).
6. The portable railway crosstie marking machine of claim 2, wherein: the roller (9) is made of rubber materials or a rubber layer is arranged on the circumferential surface of the roller (9).
7. A portable railway crosstie marking machine according to claim 3, wherein: the water tank (18) is a water tank with an opening at the upper end and without a cover, and a water outlet valve (25) is arranged at the lower part of the side wall of the water tank (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244277.4A CN111421677A (en) | 2020-03-31 | 2020-03-31 | Portable railway sleeper marking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244277.4A CN111421677A (en) | 2020-03-31 | 2020-03-31 | Portable railway sleeper marking machine |
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| Publication Number | Publication Date |
|---|---|
| CN111421677A true CN111421677A (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010244277.4A Pending CN111421677A (en) | 2020-03-31 | 2020-03-31 | Portable railway sleeper marking machine |
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| CN (1) | CN111421677A (en) |
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| KR101769084B1 (en) * | 2016-09-26 | 2017-08-18 | 주식회사 장평건설 | Rock cutting apparatus and method for tunnel excavation |
| CN108372868A (en) * | 2018-04-16 | 2018-08-07 | 安徽车安科技有限公司 | A kind of underground engines brake apparatus |
| CN208290744U (en) * | 2018-06-08 | 2018-12-28 | 铜陵铁科轨道装备有限公司 | Portable railway marking machine |
| CN110027122A (en) * | 2019-05-13 | 2019-07-19 | 中铁科工集团轨道交通装备有限公司 | High-speed rail route concrete railway board engraving machine and engraving process |
| CN209394845U (en) * | 2018-10-31 | 2019-09-17 | 中国铁路上海局集团有限公司杭州工务段 | Railway wooden bridge rests the head on gaining machine |
| CN110435018A (en) * | 2019-08-21 | 2019-11-12 | 南京蹑波物联网科技有限公司 | A kind of water cutting machine and its working method automating sleeper system |
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2020
- 2020-03-31 CN CN202010244277.4A patent/CN111421677A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924466A (en) * | 2015-07-01 | 2015-09-23 | 蔡崇友 | Gantry type double-blade multi-axis numerical control cutting-carving all-in-one machine |
| KR101769084B1 (en) * | 2016-09-26 | 2017-08-18 | 주식회사 장평건설 | Rock cutting apparatus and method for tunnel excavation |
| CN108372868A (en) * | 2018-04-16 | 2018-08-07 | 安徽车安科技有限公司 | A kind of underground engines brake apparatus |
| CN208290744U (en) * | 2018-06-08 | 2018-12-28 | 铜陵铁科轨道装备有限公司 | Portable railway marking machine |
| CN209394845U (en) * | 2018-10-31 | 2019-09-17 | 中国铁路上海局集团有限公司杭州工务段 | Railway wooden bridge rests the head on gaining machine |
| CN110027122A (en) * | 2019-05-13 | 2019-07-19 | 中铁科工集团轨道交通装备有限公司 | High-speed rail route concrete railway board engraving machine and engraving process |
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Application publication date: 20200717 |