CN108466626A - A kind of bottom door device and railway hopper car - Google Patents
A kind of bottom door device and railway hopper car Download PDFInfo
- Publication number
- CN108466626A CN108466626A CN201810547054.8A CN201810547054A CN108466626A CN 108466626 A CN108466626 A CN 108466626A CN 201810547054 A CN201810547054 A CN 201810547054A CN 108466626 A CN108466626 A CN 108466626A
- Authority
- CN
- China
- Prior art keywords
- bottom door
- seal
- guide sleeve
- door device
- guide rod
- Prior art date
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D7/00—Hopper cars
- B61D7/02—Hopper cars with discharge openings in the bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D7/00—Hopper cars
- B61D7/14—Adaptations of hopper elements to railways
- B61D7/16—Closure elements for discharge openings
- B61D7/22—Sealing means thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D7/00—Hopper cars
- B61D7/14—Adaptations of hopper elements to railways
- B61D7/16—Closure elements for discharge openings
- B61D7/24—Opening or closing means
- B61D7/28—Opening or closing means hydraulic or pneumatic
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Abstract
The present invention discloses a kind of bottom door device and railway hopper car, the bottom door device include：Two bottom doors, cylinder, link mechanism device and sealing structure；There is gap between two bottom doors；The cylinder is connect with the link mechanism device, and the link mechanism device is connect with two bottom doors；The sealing structure includes two seal members；Two seal members respectively include guide sleeve, guide rod, precompressed elastic part, stop part and seal；The guide sleeve is fixed on the bottom door, and pilot hole is offered on the guide sleeve；The guide rod is arranged in the pilot hole；The precompressed elastic part is sheathed on the guide rod；The stop part is fixed on the guide rod；When two bottom doors are closed, the end of the seal of described two seal members is in contact.Since the bottom door has certain gap, the sequence of movement of unlatching, closing between the bottom door can not be limited, and control system is simple, simple for process.
Description
Technical field
The present invention relates to railway freight-car technical field more particularly to a kind of bottom door devices and railway hopper car.
Background technology
Railway hopper car, which is compartment upper opening, lower part, has a kind of railway freight-car of bottom door, have freight volume is big, transport away from
The advantages such as low from remote, transportation cost and efficient, therefore large loose goods such as ore, building sand material etc. are all made of railway leakage
Trolley is transported.
Due to the mobile performance that loose goods itself have dead weight lower, railway hopper car utilize compartment upper opening into
Luggage goods, unloading are then completed by way of opening compartment lower part bottom door.The open and close of bottom door pass through atmospheric control
Cylinder is controlled, is moved by the movement progress bottom door link mechanism device of cylinder piston rod, to drive bottom door to complete to open and close
Close process.
When railway hopper car carries out the hauling operation of loose goods, during loading and cargo transport, bottom door is not
It only to close in place, reliably, while require to take seal approach to bottom door, have sealing performance, prevent cargo from sewing, it is ensured that goods
Safety of vehicle during utilization.
As illustrated in fig. 1 and 2, existing bottom door uses scrap (bridge) lap seal mode, the scrap (bridge) of left-hand door 1 to be located at taking for right door 2
Above side, therefore, normally-open, the closing of bottom door device need to ensure by the correct open and close door of left-hand door 1 and right door 2 sequence,
When opening the door, right door 2 must be opened prior to left-hand door 1；At closing time, left-hand door 1 must be closed prior to right door 2.If the open and close of left and right door
Sequence of movement is not right, and bottom door device cannot be closed reliably, seriously affects the loading performance of lorry, threatens the driving of lorry
Transportation safety.
In order to ensure that the correct open and close door sequence of left and right door, cylinder 3,4 control left-hand door 1, right door 2, control simultaneously respectively
System is also relatively complicated；When enabling, control system must first supply compressed air to cylinder 4, and right door 2 is allowed to open the door prior to left-hand door 1
Action；In turn at closing time, control system first supplies compressed air to cylinder 3, and left-hand door 1 is allowed to be acted prior to 2 shutdown of right door.
Therefore, bottom door plate in the prior art uses the sealing means of scrap (bridge) overlapping, causes the switch motion of left and right door suitable
The control system of sequence is more complex, and the reliability requirement of action logic is high, so that cost is higher.
Invention content
A kind of bottom door device of the application offer and railway hopper car solve in the prior art since bottom door plate uses scrap (bridge)
The sealing means of overlapping cause the control system of the action sequence of left and right door more complex, the reliability requirement of action logic
Height, so that the higher technical problem of cost.
The application provides a kind of bottom door device, and the bottom door device includes：Two bottom doors, cylinder, link mechanism device and
Sealing structure；
There is gap between two bottom doors；
The cylinder is connect with the link mechanism device, and the link mechanism device is connect with two bottom doors,
Under the driving of the cylinder, the link mechanism device drives the bottom door to open and close；
The sealing structure includes two seal members, and two seal members are respectively arranged at two bottom doors
On, for sealing the gap between two bottom doors；Two seal members respectively include guide sleeve, guide rod, precompressed
Contracting elastic component, stop part and seal；
The guide sleeve is fixed on the bottom door, and pilot hole is offered on the guide sleeve；
The guide rod is arranged in the pilot hole；
The precompressed elastic part is sheathed on the guide rod, and one end and the seal are inconsistent, the other end
It is inconsistent with the guide sleeve；
The stop part is fixed on the guide rod, and the phase of the guide sleeve is located at the precompressed elastic part
To both sides；
When two bottom doors are closed, the end of the seal of described two seal members is in contact.
Preferably, the end cross-sectional of two seals is arc.
Preferably, the precompressed elastic part is pretensioned spring.
Preferably, position of the stop part on the guide rod is adjustable.
Preferably, the guide rod, which is located on one end of the guide sleeve, is provided with screw thread, and the stop part is specially spiral shell
Mother, the nut are screwed together on the screw thread.
Preferably, the number of the cylinder 50 is 1.
Preferably, the structure and function of two seal members is identical.
Preferably, it is described close after gap is detached equal to two seals between the stop part and the guide sleeve
Seal the distance of body movement.
Preferably, the length of the seal is identical as the length of the bottom door.
A kind of railway hopper car, the railway hopper car include the bottom door device.
The application has the beneficial effect that：
Since the bottom door has certain gap, i.e., do not overlapped between the described bottom door, therefore, between the bottom door
The sequence of movement open, closed can not be limited, and control system is simple, have gap so that bottom door manufactures and assembly technology is simple
Easily, to reduce the cost of product, in addition, realizing the effective close of between bottom door gap by the sealing structure of the application
Envelope, avoids the loose goods of railroad hopper car from being dropped out out of gap, solves in the prior art since bottom door plate uses scrap (bridge)
The sealing means of overlapping cause the control system of the action sequence of left and right door more complex, the reliability requirement of action logic
Height, so that the higher technical problem of cost.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment.
Fig. 1 is the structural schematic diagram of the bottom door of railway hopper car in the prior art；
Fig. 2 is the structural schematic diagram of the bottom door scrap (bridge) sealing in Fig. 1；
Fig. 3 is a kind of structural schematic diagram of the bottom door device of railway hopper car provided by the present application；
Fig. 4 is the schematic diagram of the sealing structure of the bottom door device in Fig. 3.
Specific implementation mode
The embodiment of the present application solves in the prior art by a kind of bottom door device of offer and railway hopper car due to bottom door
Plate uses the sealing means of scrap (bridge) overlapping, causes the control system of the action sequence of left and right door more complex, action logic
Reliability requirement is high, so that the higher technical problem of cost.
Technical solution in the embodiment of the present application is in order to solve the above technical problems, general thought is as follows：
A kind of bottom door device of railway hopper car, the bottom door device include：Two bottom doors, cylinder, link mechanism device
And sealing structure；There is gap between two bottom doors；The cylinder is connect with the link mechanism device, the link mechanism
Device is connect with two bottom doors, under the driving of the cylinder, the link mechanism device drive the bottom door open and
It closes；The sealing structure includes two seal members, and two seal members are respectively arranged on two bottom doors, is used
Gap between sealing two bottom doors；Two seal members respectively include guide sleeve, guide rod, precompressed elastic
Part, stop part and seal；The guide sleeve is fixed on the bottom door, and pilot hole is offered on the guide sleeve；It is described to lead
It is arranged in the pilot hole to bar；The precompressed elastic part is sheathed on the guide rod, and one end and the sealing
Body is inconsistent, and the other end and the guide sleeve are inconsistent；The stop part is fixed on the guide rod, with the precommpression bullet
Property part is located at the opposite sides of the guide sleeve；When two bottom doors are closed, the sealing of described two seal members
The end of body is in contact.
Since the bottom door has certain gap, i.e., do not overlapped between the described bottom door, therefore, between the bottom door
The sequence of movement open, closed can not be limited, and control system is simple, have gap so that bottom door manufactures and assembly technology is simple
Easily, to reduce the cost of product, in addition, realizing the effective close of between bottom door gap by the sealing structure of the application
Envelope, avoids the loose goods of railroad hopper car from being dropped out out of gap, solves in the prior art since bottom door plate uses scrap (bridge)
The sealing means of overlapping cause the control system of the action sequence of left and right door more complex, the reliability requirement of action logic
Height, so that the higher technical problem of cost.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
In order to solve to lead to the switch of left and right door since bottom door plate uses the sealing means of scrap (bridge) overlapping in the prior art
The control system of sequence of movement is more complex, and the reliability requirement of action logic is high, so that the higher technical problem of cost, this
A kind of bottom door device of application offer and railway hopper car.
As shown in Figure 3, Figure 4, the bottom door device is applied to the upper surface of railway hopper car, including two bottom doors 10 and 20,
Cylinder 50, link mechanism device 60.
Bottom door 10 and 20 is separately positioned on the left and right side of railway hopper car, and bottom door 10 and 20 can be complete when being controlled
It can be unloaded at the action of opening and closing when the bottom door 10 and 20 is opened；It is closed in the bottom door 10 and 20
When, there is certain gap between the bottom door 10 and 20.
The cylinder 50 is connect with the link mechanism device 60, the link mechanism device 60 and the bottom door 10 and 20
Connection, under the driving of the cylinder 50, the link mechanism device 60 can drive the bottom door 10 and 20 complete open and
The action of closing.In the present embodiment, the number of the cylinder 50 is 1, and 1 cylinder 50 drives the link mechanism
Device 60 moves, while described two bottom doors being driven to be turned on and off.
Since the bottom door 10 and 20 has certain gap, i.e., do not overlapped between the bottom door 10 and 20, therefore, institute
State the unlatching between bottom door 10 and 20, the sequence of movement of closing can not be limited, control system is simple, to reduce product
Cost solves in the prior art since bottom door plate uses the sealing means of scrap (bridge) overlapping, causes the switch motion of left and right door suitable
The control system of sequence is more complex, and the reliability requirement of action logic is high, so that the higher technical problem of cost.
Since the bottom door 10 and 20 has certain gap, in order to avoid railroad hopper car loose goods from
It is dropped out in gap, the application is provided with sealing structure, and specifically, the bottom door device of the railway hopper car further includes sealing structure
30.Sealing structure 30 includes two seal members 31 and 32.
Wherein, two seal members 31 and 32 are respectively arranged on the bottom door 10 and 20, for sealing the bottom door 10
And the gap between 20, prevent the loose goods of the railroad hopper car from being dropped out out of gap.
Specifically, in the present embodiment, the structure of two seal members 31 and 32, function all same, and axial symmetry is set
It sets.
Two seal members 31 and 32 respectively include guide sleeve 311, guide rod 312, precompressed elastic part 313, stop part
314, seal 316.
Two seal members 31 and 32 guide sleeve 311 are separately fixed on bottom door 10 and 20, are offered on guide sleeve 311
Pilot hole.The guide rod 312 is arranged in the pilot hole of the guide sleeve 311, and can be moved up in the axial direction of pilot hole
Dynamic, i.e., the described pilot hole play the guiding role to the movement of the guide rod 312.
Two seal members 31 and 32 end of seal 316 are in contact, and the end cross-sectional of the seal 316 is arc
Shape had both ensured effective reliable contacts of two seals 316 in this way, while reducing the opposite fortune after two seals 316 contact
Dynamic frictional resistance provides effectively along the thrust of guide sleeve 311, two seals 316 is made to move flexibly.The seal
316 length is identical as the length of the bottom door.
Precompressed elastic part 313 is sheathed on the guide rod 312, and one end and the seal 316 are inconsistent, separately
One end and the guide sleeve 311 are inconsistent.Specifically, in the present embodiment, the precompressed elastic part 313 is precommpression bullet
Spring.The precommpression generated reaction force of pretensioned spring keeps two seals 316 reliable close by acting on seal 316
Contact, is effectively sealed between bottom door 10 and 20.
Stop part 314 is fixed on one end far from the seal 316 on guide rod 312, and with the precompressed elastic
Part 313 is located at the both sides of the guide sleeve 311.Position of the stop part 314 on the guide rod 312 is adjustable
's.When the bottom door 10 and 20 is closed, the end of two seals 316 mutually contradicts, bottom door 10 and 20 from
When closed state is to opening state, the active force between described two seals 316 disappears, and seal 316 is in precompressed elastic
Under the action of the active force of part 313, seal 316 is pushed to move, after stop part 314 and the contact of guide sleeve 311, seal
316 stop movement.As shown in figure 4, when the bottom door 10 and 20 is closed, the end of two seals 316 is mutual
It contradicting, the distance between stop part 314 and guide sleeve 311 are t1, after two seals 316 detach, what seal 316 moved
Distance as t1.
Specifically, the guide rod 312, which is located on one end of the guide sleeve 311, is provided with screw thread, and stop part 314 is specific
For nut, nut is screwed together on the screw thread, by nut on the guide rod 312 position, seal 316 can be controlled and divided
With a distance from rear movement.
When the bottom door 10 and 20 is closed, two seals 316 contact, and guide rod 312, seal 316 overcome together
The elastic force of precompressed elastic part 313 is moved along the pilot hole direction of the guide sleeve 311.
Specific assembling process is as follows：After guide rod 312 is fixed on seal 316, upper precompressed is covered on guide rod 312
Contracting elastic component 313, after then guide rod 312 passes through guide sleeve 311, the end of thread on guide rod 312 loads onto adjusting positioning spiral shell
Mother, then guide sleeve 311 is mounted on bottom door 10 and 20.
Three small―gap sutures t1, t2, t3 in control figure 4 are wanted when assembling, wherein t1 is for controlling seal 316 from bottom door
Amount of movement after sealing disengages when state in sealing contact is opened the door to bottom door when closing, makes seal 316 under the promotion of contact force
It can be easy to move along guide sleeve 311, which adjusts location nut 314 by rotation and control is adjusted；T2 is for controlling
The movement of seal 316 processed, makes the movement of seal 316 not suppress strength, by adjusting guide sleeve 311 pilot hole to 10 He of bottom door
20 height is controlled；Auxiliary protections of the t3 for the sealing performance of seal 316, when seal 316 is in contact seal shape
When state, even if contact disengages in unexpected situations, seal 316 contacts after moving t3 with guide sleeve 311, and guide sleeve 311 prevents
Seal 316 continues to move to, and makes not generate big gap between the seal 316 of two sealing devices, t3 is oriented to by adjusting
Set 311 adjusts location nut 314 in the position of bottom door 10 and 20 and rotation and carries out control adjustment.
In conjunction with Fig. 3, Fig. 4, the operation execution of the application, mechanism are as follows：
When bottom door device carries out shutdown operation from open state, under the driving of cylinder 50,60 band of link mechanism device
Dynamic two bottom doors 10 and 20 move, and when two bottom doors 10 and 20 are close to shutdown position, are separately mounted to two 10 Hes of bottom door
Two seal members 31 on 20 and 32 seal 316 start to contact, and as two bottom doors 10 and 20 continue to close, seals
The thrust compression precompressed elastic part 313 that the contact of body 316 generates, makes seal 316 be moved along 313 compression direction of precompressed elastic part
It is dynamic, obstruction will not be formed to the shutdown campaign of two bottom doors 10 and 20, when two bottom doors 10 and 20 reach shutdown position, sealing
Body 316 stops movement, and remains contact under the action of the elastic force of precompressed elastic part 313, is carried out to the cargo of lorry
Reliable sealing.
When bottom door device carries out unlatching operation from shutdown state, under the driving of cylinder 50,60 band of link mechanism device
Dynamic two bottom doors 10 and 20 move, two seal members 31 being mounted on two bottom doors 10 and 20 and 32 seal 316 with
The opening movement of bottom door and disengage contact, seal 316 moves under the thrust of precompressed elastic part 313, arrive stop part
Until 314 touch guide sleeve 311.
Further, the application further includes railway hopper car, including bottom door device described above.
Since the bottom door 10 and 20 has certain gap, i.e., do not overlapped between the bottom door 10 and 20, therefore, institute
State the unlatching between bottom door 10 and 20, the sequence of movement of closing can not be limited, control system is simple, has gap to make bottom door
Manufacture and assembly technology are simple, to reduce the cost of product, in addition, the sealing structure 30 by the application is realized to bottom door
Effective sealing in gap between 10 and 20, avoids the loose goods of railroad hopper car from being dropped out out of gap, solves existing skill
Since bottom door plate uses the sealing means of scrap (bridge) overlapping in art, cause the control system of the action sequence of left and right door more multiple
Miscellaneous, the reliability requirement of action logic is high, so that the higher technical problem of cost.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of bottom door device, which is characterized in that the bottom door device includes：Two bottom doors, cylinder, link mechanism device and close
Seal structure；
There is gap between two bottom doors；
The cylinder is connect with the link mechanism device, and the link mechanism device is connect with two bottom doors, described
Under the driving of cylinder, the link mechanism device drives the bottom door to open and close；
The sealing structure includes two seal members, and two seal members are respectively arranged on two bottom doors, is used
Gap between sealing two bottom doors；Two seal members respectively include guide sleeve, guide rod, precompressed elastic
Part, stop part and seal；
The guide sleeve is fixed on the bottom door, and pilot hole is offered on the guide sleeve；
The guide rod is arranged in the pilot hole；
The precompressed elastic part is sheathed on the guide rod, and one end and the seal are inconsistent, the other end and institute
It is inconsistent to state guide sleeve；
The stop part is fixed on the guide rod, and opposite the two of the guide sleeve are located at the precompressed elastic part
Side；
When two bottom doors are closed, the end of the seal of described two seal members is in contact.
2. bottom door device as described in claim 1, which is characterized in that the end cross-sectional of two seals is arc.
3. bottom door device as described in claim 1, which is characterized in that the precompressed elastic part is pretensioned spring.
4. bottom door device as described in claim 1, which is characterized in that position of the stop part on the guide rod is can
It adjusts.
5. bottom door device as claimed in claim 4, which is characterized in that the guide rod, which is located on one end of the guide sleeve, to be set
It is equipped with screw thread, the stop part is specially nut, and the nut is screwed together on the screw thread.
6. bottom door device as described in claim 1, which is characterized in that the number of the cylinder 50 is 1.
7. bottom door device as described in claim 1, which is characterized in that the structure and function of two seal members is identical.
8. bottom door device as described in claim 1, which is characterized in that gap is equal between the stop part and the guide sleeve
After two seal separation, the distance of the seal movement.
9. bottom door device as described in claim 1, which is characterized in that the length phase of the length of the seal and the bottom door
Together.
10. a kind of railway hopper car, which is characterized in that the railway hopper car includes such as any one of claim 1-9 right
It is required that the bottom door device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810547054.8A CN108466626B (en) | 2018-05-31 | 2018-05-31 | Bottom door device and railway hopper car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810547054.8A CN108466626B (en) | 2018-05-31 | 2018-05-31 | Bottom door device and railway hopper car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108466626A true CN108466626A (en) | 2018-08-31 |
| CN108466626B CN108466626B (en) | 2020-05-05 |
Family
ID=63261678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810547054.8A Active CN108466626B (en) | 2018-05-31 | 2018-05-31 | Bottom door device and railway hopper car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108466626B (en) |
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|---|---|---|---|---|
| US3878794A (en) * | 1974-04-24 | 1975-04-22 | Pullman Transport Leasing Co | Bottom dumping mating hopper doors sealing arrangement |
| US4222334A (en) * | 1979-03-27 | 1980-09-16 | Pullman Incorporated | Hopper discharge door operating mechanism |
| CN102431564A (en) * | 2011-10-20 | 2012-05-02 | 齐齐哈尔轨道交通装备有限责任公司 | Bottom door device and hopper car |
| CN102442325A (en) * | 2011-10-20 | 2012-05-09 | 齐齐哈尔轨道交通装备有限责任公司 | Vehicle discharge door and hopper wagon |
| CN102795232A (en) * | 2012-08-31 | 2012-11-28 | 南车长江车辆有限公司 | Bottom door device of railway freight car |
| JP2013079065A (en) * | 2011-09-21 | 2013-05-02 | Nippon Sharyo Seizo Kaisha Ltd | Hopper wagon |
| CN103253279A (en) * | 2013-05-20 | 2013-08-21 | 南车长江车辆有限公司 | Bottom door opening and closing system |
| CN103465918A (en) * | 2013-09-23 | 2013-12-25 | 南车长江车辆有限公司 | Labyrinth sealed bottom door and hopper vehicle |
| CN107226100A (en) * | 2017-06-14 | 2017-10-03 | 中车长江车辆有限公司 | A kind of device and railway hopper car of control bottom door opening and closing |
| CN208306649U (en) * | 2018-05-31 | 2019-01-01 | 中车长江车辆有限公司 | A kind of bottom door device and railway hopper car |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878794A (en) * | 1974-04-24 | 1975-04-22 | Pullman Transport Leasing Co | Bottom dumping mating hopper doors sealing arrangement |
| US4222334A (en) * | 1979-03-27 | 1980-09-16 | Pullman Incorporated | Hopper discharge door operating mechanism |
| JP2013079065A (en) * | 2011-09-21 | 2013-05-02 | Nippon Sharyo Seizo Kaisha Ltd | Hopper wagon |
| CN102431564A (en) * | 2011-10-20 | 2012-05-02 | 齐齐哈尔轨道交通装备有限责任公司 | Bottom door device and hopper car |
| CN102442325A (en) * | 2011-10-20 | 2012-05-09 | 齐齐哈尔轨道交通装备有限责任公司 | Vehicle discharge door and hopper wagon |
| CN102795232A (en) * | 2012-08-31 | 2012-11-28 | 南车长江车辆有限公司 | Bottom door device of railway freight car |
| CN103253279A (en) * | 2013-05-20 | 2013-08-21 | 南车长江车辆有限公司 | Bottom door opening and closing system |
| CN103465918A (en) * | 2013-09-23 | 2013-12-25 | 南车长江车辆有限公司 | Labyrinth sealed bottom door and hopper vehicle |
| CN107226100A (en) * | 2017-06-14 | 2017-10-03 | 中车长江车辆有限公司 | A kind of device and railway hopper car of control bottom door opening and closing |
| CN208306649U (en) * | 2018-05-31 | 2019-01-01 | 中车长江车辆有限公司 | A kind of bottom door device and railway hopper car |
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| Title |
|---|
| 李晓军等: "出口阿根廷准轨粮食漏斗车研制", 《铁道车辆》 * |
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| Publication number | Publication date |
|---|---|
| CN108466626B (en) | 2020-05-05 |
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