CN111845855A - Anti-collision combined device and method for car loading building car pulling - Google Patents
Anti-collision combined device and method for car loading building car pulling Download PDFInfo
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- CN111845855A CN111845855A CN202010722442.2A CN202010722442A CN111845855A CN 111845855 A CN111845855 A CN 111845855A CN 202010722442 A CN202010722442 A CN 202010722442A CN 111845855 A CN111845855 A CN 111845855A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 112
- 229910052742 iron Inorganic materials 0.000 claims abstract description 56
- 241000283690 Bos taurus Species 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 244000309464 bull Species 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention relates to an anti-collision combined device and method for car loading and pulling of a loading building, and belongs to the technical field of port machinery and electricity. The technical scheme is as follows: a first deflector rod limit (2) and a second deflector rod limit (3) are sequentially arranged beside the track (9), a stop bracket (16) is arranged at the stop position of the track, a stop bracket end mechanical buffer (6) and a laser limit (7) are arranged on the stop bracket (16), and an iron bullion end mechanical buffer (4) matched with the stop bracket end mechanical buffer is arranged on the iron bullion (8); a spring detection limit (5) is arranged between the second deflector rod limit and the stop bracket (16), and a limit touch rod (1) is arranged at the lower part of the iron cow. The invention can effectively solve the problems of the rail derailment of the iron cattle and the like caused by the failure of single limit, and the limit interlocking of the second deflector rod starts the laser limit, thereby avoiding the false operation of the laser ranging limit of the laser limit caused by weather or other moving objects and improving the operation stability and reliability of the equipment.
Description
Technical Field
The invention relates to an anti-collision combined device and method for car loading and pulling of a loading building, and belongs to the technical field of port machinery and electricity.
Background
In response to the national environmental protection policy, the 'revolution iron' strategy is gradually implemented in ports throughout the country, namely, the ore harbouring is changed from road to railway transportation. Railway transportation has the advantages of low energy consumption and little pollution, and accords with the trend of environmental protection development, so that the loading building is built at each port. The iron cattle is a device for drawing a train in a loading system, the weight is heavy, the traction force is large, and the brake halt is a necessary link for safe production. In the prior art, the rear limit of a car pulling system adopts single driving lever limit control, and the phenomena that the car pulling exceeds the limit protection range and even limit fails due to overlong car pulling braking distance are found in field use for many times, so that accidents such as the derailment of a railway carriage or a steel wire rope, and the like can be caused.
Disclosure of Invention
The invention aims to provide an anti-collision combined device and method for car loading and car pulling of a loading building, which are skillful in equipment combination, reasonable in layout and combined by multiple safety protection devices, can ensure that a car pulling system is stopped safely to the maximum extent, and solve the problems in the background art.
The technical scheme of the invention is as follows:
an anti-collision combined device for car loading building car pulling is arranged on an iron ox running system and comprises a limiting touch rod, a first driving rod limiting block, a second driving rod limiting block, an iron ox end mechanical buffer, a spring detection limiting block, a stop support end mechanical buffer and a laser limiting block; the device comprises a rail, a steel bullion, a traction steel wire rope, a first deflector rod limit and a second deflector rod limit, wherein the steel bullion runs on the rail, the traction steel wire rope is connected to the steel bullion, a stop bracket is arranged at the stop position of the rail, a mechanical buffer at the end of the stop bracket and a laser limit are arranged on the stop bracket, and a mechanical buffer at the end of the steel bullion, which is matched with the mechanical buffer at the end of the stop bracket, is arranged on the steel bullion; and a spring detection limit is arranged between the second deflector rod limit and the stop support, a limit touch rod is arranged at the lower part of the iron cow, and the limit touch rod is matched with the first deflector rod limit, the second deflector rod limit and the spring detection limit.
Spacing interval of first way driving lever and spacing of second way driving lever is 3 meters, and the spacing installation of laser is on stopping the support, and the spacing distance that stops the support of spring detection is 1.5 meters. If the first deflector rod limit and the second deflector rod limit are both invalid, when the iron cow touches the second deflector rod limit, the laser limit is opened. At this moment, the iron cattle continues to retreat to the position limited by the touch spring or the position limited by the laser to detect that the distance between the iron cattle and the stop bracket is less than 3 meters, and stop signals are all given to prevent the iron cattle from derailing.
The stop support is made of I-shaped steel and is installed at the retreating end position of the iron cattle, the lower part of the stop support is fixed on the track, and the yellow-black alternate oblique line sprayed on the surface of the stop support is used for warning patrolling personnel. The laser is installed in the middle of the stopping support in a limiting mode, the stopping support provides a stable base for laser limiting, and safety and reliability are achieved.
Stop support end mechanical buffer and install in the middle of stopping the support, the spacing below position of laser, and the level that stops support end mechanical buffer stretches out length and is greater than the spacing level of laser and stretches out length, if the iron ox collides with stopping the support, can prevent to damage laser spacing. The mechanical buffer at the end of the iron bull is arranged in the middle of the iron bull and is concentric with the central line of the mechanical buffer at the end of the stop bracket. Stop support end mechanical buffer and tiebull end mechanical buffer and adopt the spring form buffering, if above-mentioned each safe spacing all became invalid, can be with energy conversion spring compression potential energy when tiebull collides with the stop support, alleviate the damage degree.
The traction steel wire rope is arranged on the rope supporting rollers, and the rope supporting rollers are arranged beside the track.
The first deflector rod limit, the second deflector rod limit, the spring detection limit and the laser limit are all known and commonly used limit mechanisms in the field.
The anti-collision combined device further comprises an electric control circuit, wherein the control circuit consists of a manual button S3, a pulse relay R1, a pulse relay R2, a relay K23, a relay K28, a second deflector rod limiting movable switch S1, a spring detecting limiting movable switch S2 and a laser limiting sensor O1, the manual button S3 is a power supply dynamic-off reset master switch, the second deflector rod limiting movable switch S1 and the pulse relay R1 are connected in series to form a deflector rod limiting loop, a normally open contact of the pulse relay R1, the laser limiting sensor O1, the pulse relay R2 and the relay K23 form a laser detecting loop, and the normally open contact of the pulse relay R2 and the spring detecting limiting movable switch S2 are connected in parallel and then the relay K28 forms an execution loop; a normally open contact of the relay K23 is used as a zero position instruction switch of an operating handle of the cab of the ferry, and the operation of a traction system for drawing the steel wire rope is forcibly stopped after the contact is closed; and a normally open contact of the relay K28 is used as an emergency stop switch of an operation panel of the cab of the ferry, and the normally open contact is closed to pull the traction system of the steel wire rope to perform emergency stop and stop all actions.
The control mode of the first shifting lever limiting movable switch is the same as that of the prior art.
An anti-collision method for pulling a car in a loading building adopts the anti-collision combination device, and comprises the following steps:
when the iron cow runs, the limiting touch rod arranged at the lower part enables the movable switch S1 for limiting the second deflector rod to act; when the movable switch S1 for limiting the second deflector rod acts, the relay K23 is attracted, the normally open contact of the relay K23 serving as a zero position instruction switch of the cab operating handle of the torpedo is closed, and then the operation of a traction system for drawing the steel wire rope is forcibly stopped; meanwhile, a pulse relay R1 is started to supply power to a laser limit sensor O1, and laser ranging work is started by laser limit;
the laser ranging distance for setting the laser limit is 3 meters, when the distance between the tractor and the laser limit sensor O1 is less than 3 meters or the spring detects the limit movable switch S2 to act, the detection distance is 1.5 meters at the moment, the laser limit sensor O1 outputs voltage to start the pulse relay R2, after the normally open contact of the pulse relay R2 is switched on or the spring detects the limit movable switch S2 to directly start the relay K28 to suck, the normally open contact of the relay K28 serving as the emergency stop switch of the cab operation panel is closed, the traction system of the traction steel wire rope is in emergency stop, and all actions are stopped.
The invention is used as the supplement of the first deflector rod limit in the prior art, the added laser limit can effectively avoid the problem that the first deflector rod limit is flushed by inertia, and simultaneously, the pulse relay is used for locking the output action, thereby further increasing the stability of the continuous output of the stop instruction.
Meanwhile, aiming at the characteristics of laser limit and easy misoperation of a pulse relay, a second deflector rod limit is added and is specially used for starting a laser limit distance measurement system and simultaneously locking an operating handle output instruction of a cab of the ferry, so that frequent misoperation is avoided.
After the electric control circuit of the invention is started, the iron bulls are in a locking state. The manual button S3 is manually pressed to shield the electric control circuit, and the manual button S3 is restored after confirming that the iron cow leaves the dangerous area, so that the whole electric control circuit is restored to the initial state.
As the supplement of the collision, a stopping bracket, a mechanical buffer at the end of the iron bull and a mechanical buffer at the end of the stopping bracket are added, so that the collision damage degree with small probability is reduced to the minimum. The integrated combination device is integrated, so that the car loading building and car pulling system is safe to use.
The invention can effectively solve the problems of the derailment of the iron cattle and the like caused by the failure of single limit, and the starting limit is arranged to avoid the false operation of the laser ranging limit caused by weather or other moving objects, thereby improving the running stability and reliability of the equipment.
The invention has the beneficial effects that: the invention can effectively solve the problems of the rail derailment of the iron cattle and the like caused by the failure of single limit, and the limit interlocking of the second deflector rod starts the laser limit, thereby avoiding the false operation of the laser ranging limit of the laser limit caused by weather or other moving objects and improving the operation stability and reliability of the equipment. The equipment combination is ingenious, the layout is reasonable, and the safety stop of the train pulling system can be ensured to the maximum extent by combining multiple safety protection devices.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the position of the buffer and the shift lever of the IRON end according to the embodiment of the present invention;
FIG. 3 is a top view of a bull in an embodiment of the present invention;
FIG. 4 is a schematic illustration of a stop support end buffer and laser limit in an embodiment of the invention;
FIG. 5 is a schematic diagram of the control electrical circuit of an embodiment of the present invention;
FIG. 6 is a control flow diagram of a loading embodiment of the present invention;
in the figure: spacing touching pole 1, first driving lever is spacing 2, second driving lever is spacing 3, the mechanical buffer 4 of tieniu end, the spacing 5 of spring detection, stop support end mechanical buffer 6, spacing 7 of laser, tieniu 8, track 9, pull wire rope 10, hold in the palm rope roller 11, track upper surface 12, track lower surface 13, track supporting beam 14, couple 15, stop support 16.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
An anti-collision combined device for car loading building car pulling is arranged on an iron ox 8 running system and comprises a limiting touch rod 1, a first deflector rod limit 2, a second deflector rod limit 3, an iron ox end mechanical buffer 4, a spring detection limit 5, a stop support end mechanical buffer 6 and a laser limit 7; the iron bulls 8 run on the track 9, the traction steel wire rope 10 is connected to the iron bulls 8, a first deflector rod limit 2 and a second deflector rod limit 3 are sequentially arranged beside the track 9, a stop bracket 16 is arranged at the stop position of the track 9, a stop bracket end mechanical buffer 6 and a laser limit 7 are arranged on the stop bracket 16, and an iron bulls end mechanical buffer 4 matched with the stop bracket end mechanical buffer 6 is arranged on the iron bulls 8; and a spring detection limit 5 is arranged between the second deflector rod limit 3 and the stop support 16, a limit touch rod 1 is arranged at the lower part of the iron cow 8, and the limit touch rod 1 is matched with the first deflector rod limit 2, the second deflector rod limit 3 and the spring detection limit 5.
Spacing 2 of first way driving lever and spacing 3 of second way driving lever are 3 meters, and spacing 7 of laser is installed on stopping support 16, and the distance that spacing 5 distance stopped support 16 was detected to the spring is 1.5 meters. If the first deflector rod limit 2 and the second deflector rod limit 3 are both invalid, when the iron cow touches the second deflector rod limit, the laser limit 7 is opened. At this moment, the iron cattle continuously retreats to the position where the contact spring detects the limit 5 or the position where the laser limit 7 detects that the distance between the iron cattle and the stop support is less than 3 meters, and stop signals are all given to prevent the iron cattle from derailing.
The stop bracket 16 is made of I-steel, is arranged at the retreating terminal position of the iron bulls, is fixed on the track 9 below the iron bulls, and is sprayed with yellow-black alternate oblique lines on the surface to warn patrolmen; the laser limit 7 is arranged in the middle of the stop support, and the stop support provides a stable base for laser limit, so that the laser stop support is safe and reliable.
Stop support end mechanical buffer 6 and install in the middle of stopping the support, the spacing 7 below positions of laser, and the horizontal extension length that stops support end mechanical buffer 6 is greater than the spacing 7 horizontal extension lengths of laser, if the iron ox collides with the stop support, can prevent to damage laser spacing. The mechanical buffer 4 at the end of the iron bull is arranged in the middle of the iron bull and is concentric with the central line of the mechanical buffer 6 at the end of the stop bracket. Stop support end mechanical buffer 6 and tiebull end mechanical buffer 4 and adopt the spring form buffering, if above-mentioned each safe spacing all became invalid, can be with energy conversion spring compression potential energy when tiebull collides with the stop support, alleviate the damage degree.
The traction steel wire rope 10 is arranged on a plurality of rope supporting rollers 11, and the rope supporting rollers 11 are arranged beside the track 9.
The first deflector rod limit 2, the second deflector rod limit 3, the spring detection limit 5 and the laser limit 7 related to the invention are all known and commonly used limit mechanisms in the field.
The anti-collision combined device further comprises an electric control circuit, wherein the control circuit consists of a manual button S3, a pulse relay R1, a pulse relay R2, a relay K23, a relay K28, a second deflector rod limiting movable switch S1, a spring detecting limiting movable switch S2 and a laser limiting sensor O1, the manual button S3 is a power supply dynamic-off reset master switch, the second deflector rod limiting movable switch S1 and the pulse relay R1 are connected in series to form a deflector rod limiting loop, a normally open contact of the pulse relay R1, the laser limiting sensor O1, the pulse relay R2 and the relay K23 form a laser detecting loop, and the normally open contact of the pulse relay R2 and the spring detecting limiting movable switch S2 are connected in parallel and then the relay K28 forms an execution loop; a normally open contact of the relay K23 is used as a zero position instruction switch of an operating handle of the cab of the ferry, and the operation of a traction system of the traction steel wire rope 10 is forcibly stopped after the contact is closed; the normally open contact of the relay K28 is used as an emergency stop switch of an operation panel of the cab of the ferry, and the contact is closed to cause the traction system of the steel wire rope 10 to be in emergency stop and stop all actions.
The control mode of the first shifting lever limiting movable switch is the same as that of the prior art.
An anti-collision method for pulling a car in a loading building adopts the anti-collision combination device, and comprises the following steps:
when the iron bulls 8 run, the limit touch rod 1 arranged at the lower part enables the movable switch S1 for limiting the second deflector rod to act; when the movable switch S1 for limiting the second deflector rod acts, the relay K23 is attracted, the normally open contact of the relay K23 serving as a zero position instruction switch of the cab operating handle of the torpedo is closed, and then the traction system for drawing the steel wire rope 10 is forcibly stopped; meanwhile, a pulse relay R1 is started to supply power to a laser limit sensor O1, and the laser limit 7 starts laser ranging work;
the laser ranging distance of the laser limit 7 is set to be 3 meters, when the distance between the iron ox 8 and the laser limit sensor O1 is less than 3 meters or the spring detects the limit movable switch S2 to act, the detection distance is 1.5 meters at the moment, the laser limit sensor O1 outputs voltage to start the pulse relay R2, the normally open contact of the pulse relay R2 is switched on or the spring detects the limit movable switch S2 to directly start the relay K28 to suck, the normally open contact of the relay K28 serving as the emergency stop switch of the operation panel of the iron ox cab is closed, the traction system of the traction steel wire rope 10 is in emergency stop, and all actions are stopped.
The invention is used as the supplement of the first deflector rod limit in the prior art, the added laser limit 7 can effectively avoid the problem that the first deflector rod limit is flushed by inertia, and simultaneously, the pulse relay is used for locking the output action, thereby further increasing the stability of the continuous output of the stop instruction.
Meanwhile, aiming at the characteristics of laser limit 7 and easy misoperation of a pulse relay, a second deflector rod limit is added and is specially used for starting a distance measuring system of the laser limit 7 and simultaneously locking an operating handle output instruction of a cab, so that frequent misoperation is avoided.
After the electric control circuit of the invention is started, the iron bulls are in a locking state. The manual button S3 is manually pressed to shield the electric control circuit, and the manual button S3 is restored after confirming that the iron cow leaves the dangerous area, so that the whole electric control circuit is restored to the initial state.
In addition to the collision, the stop bracket, the mechanical buffer 4 at the iron end and the mechanical buffer 6 at the stop bracket end are added, so that the collision damage degree with small probability is reduced to the minimum. The integrated combination device is integrated, so that the car loading building and car pulling system is safe to use.
Claims (6)
1. The utility model provides a loading building anticollision composite set that pulls a car which characterized in that: the device is arranged on an iron ox (8) running system and comprises a limiting touch rod (1), a first deflector rod limiting (2), a second deflector rod limiting (3), an iron ox end mechanical buffer (4), a spring detection limiting (5), a stop support end mechanical buffer (6) and a laser limiting (7); the device comprises an iron buller (8), a traction steel wire rope (10), a first deflector rod limiting block (2) and a second deflector rod limiting block (3) are sequentially arranged beside a track (9), a stopping support (16) is arranged at the stopping position of the track (9), a stopping support end mechanical buffer (6) and a laser limiting block (7) are arranged on the stopping support (16), and an iron buller end mechanical buffer (4) matched with the stopping support end mechanical buffer (6) is arranged on the iron buller (8); a spring detection limit (5) is arranged between the second deflector rod limit (3) and the stop support (16), a limit touch rod (1) is arranged on the lower portion of the iron cow (8), and the limit touch rod (1) is matched with the first deflector rod limit (2), the second deflector rod limit (3) and the spring detection limit (5).
2. The combined device for preventing collision of the car loading building and the car pulling according to claim 1, wherein: the distance between the first deflector rod limit (2) and the second deflector rod limit (3) is 3 meters, the laser limit (7) is installed on the stop support (16), and the distance between the spring detection limit (5) and the stop support (16) is 1.5 meters.
3. The combined device for preventing collision of car loading and pulling of car building according to claim 1 or 2, characterized in that: the stopping bracket (16) is made of I-shaped steel, is arranged at the retreating terminal position of the iron cow, is fixed on the track (9) below the I-shaped steel, and is sprayed with yellow-black alternate oblique lines on the surface; the laser limit (7) is arranged in the middle of the stop support, and the stop support provides a stable base for laser limit.
4. The combined device for preventing collision of car loading and pulling of car building according to claim 1 or 2, characterized in that: the stop support end mechanical buffer (6) is arranged in the middle of the stop support and below the laser limit (7), and the horizontal extension length of the stop support end mechanical buffer (6) is greater than that of the laser limit (7).
5. The combined device for preventing collision of car loading and pulling of car building according to claim 1 or 2, characterized in that: the mechanical buffer (4) at the end of the iron bull is arranged in the middle of the iron bull and is concentric with the central line of the mechanical buffer (6) at the end of the stopping bracket.
6. A method of collision avoidance in the event of a pull from a loading building, using apparatus as defined in any one of claims 1 to 5, comprising the steps of:
the anti-collision combined device further comprises an electric control circuit, wherein the control circuit consists of a manual button S3, a pulse relay R1, a pulse relay R2, a relay K23, a relay K28, a second deflector rod limiting movable switch S1, a spring detecting limiting movable switch S2 and a laser limiting sensor O1, the manual button S3 is a power supply dynamic-off reset master switch, the second deflector rod limiting movable switch S1 and the pulse relay R1 are connected in series to form a deflector rod limiting loop, a normally open contact of the pulse relay R1, the laser limiting sensor O1, the pulse relay R2 and the relay K23 form a laser detecting loop, and the normally open contact of the pulse relay R2 and the spring detecting limiting movable switch S2 are connected in parallel and then the relay K28 forms an execution loop; a normally open contact of the relay K23 is used as a zero instruction switch of an operating handle of the cab of the Taurus; a normally open contact of the relay K28 is used as an emergency stop switch of an operation panel of the cab of the Taurus;
when the iron bulls (8) run, the limit touch rod (1) arranged at the lower part enables the movable switch S1 for limiting the second deflector rod to act; when the movable switch S1 for limiting the second deflector rod acts, the relay K23 is attracted, the normally open contact of the relay K23 serving as a zero position instruction switch of the cab operating handle of the torpedo is closed, and then the operation of a traction system for drawing the steel wire rope (10) is forcibly stopped; meanwhile, a pulse relay R1 is started to supply power to a laser limit sensor O1, and the laser limit (7) starts laser ranging work;
the laser ranging distance of the laser limit (7) is set to be 3 meters, when the distance between a tractor (8) and the laser limit sensor O1 is less than 3 meters or the spring detects the action of the limit movable switch S2, the detection distance is 1.5 meters at the moment, the laser limit sensor O1 outputs voltage to start the pulse relay R2, after the normally open contact of the pulse relay R2 is switched on or the spring detects the limit movable switch S2 to directly start the relay K28 to suck, the normally open contact of the relay K28 serving as the emergency stop switch of the tractor cab operation panel is closed, the general emergency stop of a traction system of a traction steel wire rope (10) is realized, and all actions are stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722442.2A CN111845855A (en) | 2020-07-24 | 2020-07-24 | Anti-collision combined device and method for car loading building car pulling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722442.2A CN111845855A (en) | 2020-07-24 | 2020-07-24 | Anti-collision combined device and method for car loading building car pulling |
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| CN111845855A true CN111845855A (en) | 2020-10-30 |
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| CN202010722442.2A Pending CN111845855A (en) | 2020-07-24 | 2020-07-24 | Anti-collision combined device and method for car loading building car pulling |
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| CN205855817U (en) * | 2016-07-29 | 2017-01-04 | 河南省矿山起重机有限公司 | A kind of monkey walking limit safety device |
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| CN108313876A (en) * | 2018-03-20 | 2018-07-24 | 曹妃甸港矿石码头股份有限公司 | A kind of packaged type ship unloaders traveling stop device and its backstop method |
| CN111413703A (en) * | 2020-04-21 | 2020-07-14 | 成都唐源电气股份有限公司 | Pantograph slide passes through recognition device and pantograph slide on-line monitoring system |
| CN212637479U (en) * | 2020-07-24 | 2021-03-02 | 曹妃甸港矿石码头股份有限公司 | Anti-collision combined device for car loading building pulling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202541580U (en) * | 2012-03-23 | 2012-11-21 | 中国神华能源股份有限公司 | Braking device for railway vehicle |
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Application publication date: 20201030 |
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| RJ01 | Rejection of invention patent application after publication |