CN216613671U - In-tank hydraulic car arrester based on cage automation - Google Patents
In-tank hydraulic car arrester based on cage automation Download PDFInfo
- Publication number
- CN216613671U CN216613671U CN202123059189.6U CN202123059189U CN216613671U CN 216613671 U CN216613671 U CN 216613671U CN 202123059189 U CN202123059189 U CN 202123059189U CN 216613671 U CN216613671 U CN 216613671U
- Authority
- CN
- China
- Prior art keywords
- car
- cage
- hydraulic
- claw
- oil cylinder
- 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.)
- Active
Links
Images
Landscapes
- Types And Forms Of Lifts (AREA)
Abstract
The utility model discloses an in-tank hydraulic car arrester based on cage automation, which comprises a car arresting claw and a hydraulic system, wherein the car arresting claw is arranged at a car arresting position on an in-tank track, the hydraulic system comprises a hydraulic oil cylinder and a hydraulic station, the hydraulic oil cylinder is connected with the car arresting claw, and the hydraulic station is arranged in a cage and is used for driving the hydraulic oil cylinder to open and close the car arresting claw. The hydraulic automatic car stopping device is beneficial to realizing the automatic car stopping function in the cage in a hydraulic mode. In addition, on the basis of the structure, the utility model also provides a hand-pulling mechanism of the car stopping claw, and when the hydraulic oil cylinder cannot work in a power-off state, the opening and the closing of the car stopping claw are manually controlled by the hand-pulling mechanism of the car stopping claw. The utility model is beneficial to meeting the requirements of entering and exiting cars at the same side and different sides of the cage, and can realize the opening and closing control of the car stopping claw in a hydraulic mode and can also realize the opening and closing control of the car stopping claw in a manual mode.
Description
Technical Field
The utility model relates to a car arrester, in particular to an in-tank hydraulic car arrester based on cage automation.
Background
The car arrester is used as an important protection device in a coal mine vertical shaft, plays an important role in guaranteeing personal safety of lifting personnel and normal operation of a cage in a vertical shaft lifting system, and the safety reliability and the lifting benefit of the cage operation are directly influenced by the performance of the car arrester.
In future development, cage development will be developed towards automation and intellectualization, and development of car stoppers is required to be developed towards the direction. Based on this, need provide a jar hydraulic pressure car arrester in to satisfy cage with the strange side business turn over car.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an in-tank hydraulic car arrester based on cage automation, which realizes an automatic car arresting function through hydraulic control and meets the requirement of entering and exiting cars on the same side and different sides of a cage.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the in-tank hydraulic car arrester based on cage automation comprises a car arresting claw and a hydraulic system;
the car stopping claw is arranged at a car stopping position on the track in the cage;
the middle part of the car stopping claw is provided with a shaft hole, and the car stopping claw is installed through a rotating shaft and can rotate around the rotating shaft;
the hydraulic system comprises a hydraulic oil cylinder and a hydraulic station arranged inside the cage;
one end of the hydraulic oil cylinder is connected with the bottom connecting handle of the car stopping claw, and the other end of the hydraulic oil cylinder is fixed at the lower end of the cage tray body; the hydraulic station is connected with the hydraulic oil cylinder through a pipeline and is used for driving the hydraulic oil cylinder to open and close the car stopping claw.
Preferably, the car stopping claws are provided with one group or two groups;
and two vehicle blocking claws are arranged in each group and are symmetrically arranged on the vehicle inlet side and the vehicle outlet side of the cage.
Preferably, the car arrester further comprises a return spring for pulling the car arrester to realize return;
wherein, one end of the reset spring is connected with the lower end of the car stopping claw, and the other end is fixed on the side beam of the cage tray body.
Preferably, the lower end of the car stopping claw and the mounting positions on the side beam of the cage tray body corresponding to the return springs are respectively provided with a mounting nut; wherein each end of the return spring is connected with one mounting nut respectively.
Preferably, the car arrester further comprises a car arrester hand pulling mechanism which comprises a steel wire rope and a steel wire rope guide wheel;
the steel wire rope guide wheel is fixed on the side beam of the cage tray body; one end of the steel wire rope is connected with the bottom connecting handle of the car stopping claw, the steel wire rope is wound through the steel wire rope guide wheel, and the other end of the steel wire rope is fixed at one end of the car discharging side of the cage disc body;
the force application direction of the steel wire rope is the same as the force application direction of the hydraulic oil cylinder.
Preferably, one end of the hydraulic oil cylinder is connected with the bottom connecting handle of the car stopping claw through a connecting fork; wherein, the connecting fork is fixedly connected with the hydraulic oil cylinder, and a long strip-shaped pin shaft hole extending along the length direction of the connecting fork is arranged on the connecting fork.
Preferably, the two bottom connecting handles of the car stopping claw are respectively a first connecting handle and a second connecting handle;
circular holes are formed in the first connecting handle and the second connecting handle;
one end of the hydraulic oil cylinder is connected with the first connecting handle, and one end of the steel wire rope is connected with the second connecting handle.
The utility model has the following advantages:
as mentioned above, the utility model relates to an in-tank hydraulic car arrester based on cage automation, which comprises a car arresting claw and a hydraulic system, wherein the car arresting claw is arranged at a car arresting position on an in-tank track, the hydraulic system comprises a hydraulic oil cylinder and a hydraulic station, the hydraulic oil cylinder is connected with the car arresting claw, and the hydraulic station is arranged in a cage and used for driving the hydraulic oil cylinder to realize the opening and closing of the car arresting claw. The hydraulic automatic car stopping device is favorable for realizing the automatic car stopping function in the cage in a hydraulic mode. In addition, on the basis of the structure, the utility model also provides a hand pulling mechanism of the car stopping claw, and when the hydraulic oil cylinder cannot work in a power-off state, the opening and the closing of the car stopping claw are controlled by the hand pulling mechanism of the car stopping claw. The utility model is beneficial to meeting the requirement of entering and exiting the cage from the same side and the different side, and can realize the opening and closing control of the car stopping claw in a hydraulic mode and can also realize the opening and closing control of the car stopping claw in a manual mode.
Drawings
Fig. 1 is a schematic structural diagram of an in-tank hydraulic car arrester based on cage automation in embodiment 1 of the present invention;
FIG. 2 is a schematic view of a state in which the car stopping pawl is opened hydraulically in embodiment 1 of the present invention;
FIG. 3 is a schematic view of a state in which the car stopping pawl is closed hydraulically in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a holding pawl hand pulling mechanism controlling opening and closing of a holding pawl in embodiment 1 of the present invention;
fig. 5 is a schematic side view of the car stopping pawl in embodiment 1 of the present invention;
FIG. 6 is another schematic structural view of the car stopping pawl in embodiment 1 of the present invention;
fig. 7 is a schematic structural diagram of an in-tank hydraulic car arrester based on cage automation in embodiment 2 of the present invention;
fig. 8 is a schematic view of a state in which one of the holding-up claws is opened by hydraulic means in embodiment 2 of the utility model;
FIG. 9 is a schematic view showing a state where another car stopping pawl is opened by hydraulic means in embodiment 2 of the present invention;
fig. 10 is a schematic structural view of a holding pawl hand-pulling mechanism controlling opening and closing of a holding pawl in embodiment 2 of the present invention;
the device comprises a vehicle stopping claw 1, a vehicle stopping claw 2, a shaft hole 3, a rotating shaft 4, a hydraulic oil cylinder 5, a reset spring 6, a mounting nut 7, a steel wire rope 8, a first connecting handle 9, a second connecting handle 10, a circular hole 11, a circular hole 12, a connecting fork 13 and a long strip-shaped pin shaft hole 14;
15-hydraulic gear pump, 16-hydraulic oil tank, 17-explosion-proof electromagnetic valve, 18-energy accumulator, 19-steel wire rope guide wheel.
Detailed Description
The utility model is described in further detail below with reference to the following figures and detailed description:
example 1
This embodiment 1 has mentioned a hydraulic car arrester in jar based on cage is automatic.
As shown in figure 1, the in-tank hydraulic car arrester based on cage automation comprises a car arrester 1 and a hydraulic system.
In embodiment 1, the car stopping claws 1 are provided in a set of two car stopping claws in total, wherein one car stopping claw 1 is installed at each car stopping position on the car entering side and the car exiting side of the cage. Taking the car stopping claw 1 arranged at the car outlet side of the cage as an example:
the car stopping claw 1 is installed on a rail on the car exit side in the cage, as shown in fig. 6.
The middle part of the car stopping claw 1 is provided with a shaft hole 2, and the car stopping claw 1 is installed through a rotating shaft 3 and can rotate around the rotating shaft 3.
Through the design, the vehicle stopping claw 1 can be opened and closed, when the vehicle stopping claw 1 is opened, a single vehicle (such as a mine car or a flat car) can smoothly pass through, and when the vehicle stopping claw 1 is closed, the vehicle stopping function of the single vehicle is favorably realized.
The hydraulic system comprises a hydraulic ram 4 and a hydraulic station arranged inside the cage.
Fig. 2 and 3 are schematic views of the present embodiment 1 showing the state when the holding pawl is opened and closed by hydraulic means, respectively, wherein fig. 2 and 3 are schematic views when viewed from left to right from a in fig. 1.
One end of the hydraulic oil cylinder 4 is connected with the bottom connecting handle of the car stopping claw 1, and the other end is fixed at the lower end of the cage tray body. The hydraulic station is connected with the hydraulic oil cylinder 4 through a pipeline and is used for driving the hydraulic oil cylinder 4 to open and close the car stopping claw 1.
When the hydraulic oil cylinder 4 retracts, the car stopping claw 1 rotates around the rotating shaft 3, the car stopping claw 1 is in an open state, and when the hydraulic oil cylinder 4 extends, the car stopping claw 1 rotates around the rotating shaft 3, and the car stopping claw 1 is in a closed state, as shown in fig. 2.
The hydraulic station in the embodiment has a conventional structure, and comprises a direct-current explosion-proof motor, a hydraulic gear pump 15, a hydraulic oil tank 16, an oil circuit block, a one-way valve, an explosion-proof electromagnetic valve 17, a pressure sensor, a pressure gauge, a connecting pipeline and the like.
The direct-current explosion-proof motor drives the hydraulic gear pump to rotate, the gear pump converts mechanical energy into pressure energy of hydraulic oil, and the hydraulic oil is transmitted to the hydraulic oil cylinder 4 through an external pipeline after direction, pressure and flow regulation is realized through an integrated block (or valve combination).
The opening and closing of the car arrester are controlled by the extension and retraction of the hydraulic oil cylinder 4.
The hydraulic station furthermore comprises an accumulator 18, the accumulator 18 being an energy storage device.
The accumulator 18 converts energy in the hydraulic system to compression or potential energy for storage when the car arrester is not in operation and releases the compressed energy when the car arrester needs to be opened or closed.
The accumulator 18 can provide a large flow of energy for a short time, rapidly open or close the car arrester, and when the hydraulic system is momentarily pressurized up, the accumulator 18 can absorb the energy to ensure that the pressure of the whole system is normal.
The hydraulic station adopts the combination of a direct-current explosion-proof motor and a hydraulic gear pump, so that the noise is low, the operation is stable, and the reliability is higher.
In this embodiment 1, the thrust of the hydraulic cylinder 4 is greater than or equal to 200 kg.
In order to meet the height requirement of the plate body, the structure of each part of the hydraulic station in the embodiment adopts a split type arrangement, as shown in fig. 1.
As shown in fig. 2 and 3, the car arrester further comprises a return spring 5 for pulling the car arrester 1 to realize return. Wherein, one end of the reset spring 5 is connected with the lower end of the car stopping claw 1, and the other end is fixed on the side beam of the cage tray body.
As shown in fig. 2, when the locking pawl 1 is in the open state, the return spring 5 is in a stretched state.
As shown in fig. 3, when the locking pawl 1 is in the open and closed state, the return spring 5 is returned.
In order to realize the installation of the return spring 5, the present embodiment is further designed as follows:
and mounting nuts 6 and 7 are respectively arranged at the lower end of the car stopping claw 1 and the mounting positions of the side beams of the cage tray body corresponding to the return springs 5, wherein each end of each return spring 5 is respectively connected with one mounting nut 6.
Through the installation nuts 6 and 7, the installation of the return spring 5 is facilitated.
In addition, this example 1 car arrester still includes car arrester hand power mechanism, and car arrester hand power mechanism is used for under the outage state, when hydraulic cylinder 4 can't work, controls the opening and the closure of car arrester through car arrester hand power mechanism.
As shown in fig. 1 and 4, the car stopping claw hand pulling mechanism includes a wire rope 8 and a wire rope guide wheel 19.
Wherein, the steel wire rope guide wheel 19 is fixed on the side beam of the cage tray body.
One end of a steel wire rope 8 is connected with the bottom connecting handle of the car stopping claw 1, the steel wire rope 8 winds through a steel wire rope guide wheel, and the other end of the steel wire rope 8 is fixed at one end of the car outlet side of the cage disc body (upper plane) (for example, through a nut and a rope clamp).
Wherein, the force application direction of the steel wire rope 8 is the same as the force application direction of the hydraulic oil cylinder 4.
Under the power-off state, when the hydraulic oil cylinder cannot work, the hand-pulling steel wire rope manually stretches the steel wire rope 8 to control the car stopping claw 1 to be opened.
In order to realize the connection of the car stopping claw 1 with the hydraulic oil cylinder 4 and the steel wire rope 8, the following design is also carried out:
as shown in fig. 5, there are two bottom connecting handles of the car stopping claw 1, which are a first connecting handle 9 and a second connecting handle 10, wherein circular holes, such as circular holes 11 and 12, are formed on the first connecting handle 9 and the second connecting handle 10.
Wherein, one end of the hydraulic oil cylinder 4 is connected with a first connecting handle 9, and one end of the steel wire rope 8 is connected with a second connecting handle 10.
As shown in fig. 2, a connecting fork 13 is fixedly connected to a rod end of the hydraulic cylinder 4.
The hydraulic oil cylinder 4 is connected with a bottom connecting handle (namely a first connecting handle 9) of the car stopping claw 1 through the connecting fork 13. The connecting fork 14 is provided with a strip-shaped pin shaft hole 14, so that the hydraulic cylinder can be conveniently and manually controlled to open and close the car stopping claw when the hydraulic cylinder cannot be normally used.
The car stopping claw 1 on the car entering side of the cage is structurally symmetrical to the car stopping claw 1 on the car exiting side of the cage, and the description is omitted here.
The car stopping principle of the in-tank hydraulic car arrester in the embodiment is as follows:
when the mine car stopping device works normally, the car stopping claw 1 is in a closed state, when 1 standard mine car is pushed into the cage, a hitter opens the car entering side car stopping claw 1, the mine car is pushed into the cage, and after the mine car stops stably, the car entering side car stopping claw is closed, and the cage door is closed;
resetting the car operating equipment, sending a lifting signal, operating the cage, enabling the cage to horizontally stop after reaching a stop position, enabling the car operating equipment such as a cradle, a safety door and the like to act, simultaneously opening the cage door, remotely operating a hitter, and completely opening the car arrester in the cage;
opening a single car arrester of the car operating equipment, and actuating a car pusher to push a car waiting outside the tank to start to enter the tank;
when the rear wheel of the tank-discharging mine car is driven by the tank-feeding mine car roof to leave the car-blocking claw 1 on the cage-discharging side, the hydraulic oil cylinder 4 is operated in a remote mode, the car-blocking claw 1 on the car-discharging side is closed to block the tank-feeding mine car, and the blocking principle is the same as that of the tank-feeding mine car, so that the description is omitted.
The hydraulic pressure car arrester in jar in this embodiment 1 adopts the hydraulic drive mode, does benefit to the degree of automation that improves the car arrester, reduces workman's intensity of labour. In addition, in the embodiment 1, a structure for manually controlling the opening and closing of the car stopping pawl 1 is designed.
This embodiment 1 is applicable to the scene when cage business turn over bicycle operating mode and uses.
Example 2
This embodiment 2 also describes an in-tank hydraulic car arrester based on cage automation, and the technical features of the car arrester can be referred to the above embodiment 1 except that the following technical features are different from those of the above embodiment 1.
As shown in fig. 7 to 10, the holding pawl 1 of the present embodiment 2 has two sets.
Wherein, a group of car stopping claws 1 are respectively arranged on two tracks in the cage according to the car stopping positions of a single car and two cars. And each group of the car stopping claws 1 is provided with two car stopping claws 1, wherein one car stopping claw 1 is respectively arranged at the car stopping positions of the car entering side and the car exiting side of the cage.
Take two car stopping claws 1 (for stopping a single car or two cars) arranged on the car exit side of the cage as an example:
fig. 8 shows a schematic structural diagram of a car stopping claw 1 which is driven to open by hydraulic means.
Fig. 8 is a schematic view when viewed from the left-to-right direction along point a in fig. 7.
Fig. 9 shows a schematic structural diagram of the hydraulic opening of the other holding-up pawl 1.
Fig. 9 is a schematic view when viewed from the left-to-right direction along point B in fig. 7.
As can be seen from fig. 8 and 9, the car stopping claws 1a and 1b are respectively located on one rail in the cage, and the two car stopping claws 1 can be arranged on the corresponding rails according to the car stopping positions of the single car and the double cars.
Each car stopping claw 1 is respectively provided with a hydraulic oil cylinder 4 for driving the car stopping claws 1 to open and close.
As shown in fig. 10, each car stopping claw 1 is further connected with a car stopping claw hand pulling mechanism, and the car stopping claw hand pulling mechanism is used for controlling the opening and closing of the car stopping claw when the hydraulic oil cylinder cannot work in a power-off state.
The structure of the car stopping claw hand pulling mechanism in the embodiment 1 is the same as that of the car stopping claw hand pulling mechanism in the embodiment 1.
As shown in FIG. 7, when the car arrester needs to block a single car, a piston rod of the hydraulic oil cylinder 4a retracts, the car blocking claw 1a is opened, the tramcar is allowed to pass through, the hydraulic oil cylinder 4b is always in a retracted state, and the car blocking claw 1b is in a normally open state.
As shown in figure 7, when the car arrester needs to block two cars, the principle is the same as that of a single car, namely when a piston rod of a hydraulic oil cylinder 4b retracts, a car blocking claw 1b is opened to allow a mine car to pass through, and in the working condition, the car blocking claw 1a is in a normally open state.
The car stopping claw 1 arranged on the car entering side of the cage is structurally symmetrical to the car stopping claw 1 on the car exiting side of the cage, and the detailed description is omitted here.
This embodiment 2 is applicable to the scene when cage business turn over bicycle, two operating modes and uses.
It should be understood, however, that the description herein of specific embodiments is not intended to limit the utility model to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. The in-tank hydraulic car arrester based on cage automation is characterized by comprising a car arrester and a hydraulic system;
the car stopping claw is arranged at a car stopping position on the track in the cage;
the middle part of the car stopping claw is provided with a shaft hole, and the car stopping claw is installed through a rotating shaft and can rotate around the rotating shaft;
the hydraulic system comprises a hydraulic oil cylinder and a hydraulic station arranged inside the cage;
one end of the hydraulic oil cylinder is connected with the bottom connecting handle of the car stopping claw, and the other end of the hydraulic oil cylinder is fixed at the lower end of the cage tray body; the hydraulic station is connected with the hydraulic oil cylinder through a pipeline and is used for driving the hydraulic oil cylinder to open and close the car stopping claw.
2. The in-tank hydraulic car arrester based on cage automation as claimed in claim 1,
one or two groups of the car stopping claws are provided;
and two vehicle blocking claws are arranged in each group and are symmetrically arranged on the vehicle inlet side and the vehicle outlet side of the cage.
3. The in-tank hydraulic car arrester based on cage automation as claimed in claim 1,
the car arrester also comprises a reset spring for pulling the car arresting claw to reset;
wherein, one end of the reset spring is connected with the lower end of the car stopping claw, and the other end is fixed on the side beam of the cage tray body.
4. The in-tank hydraulic car arrester based on cage automation as claimed in claim 3,
mounting nuts are respectively arranged at the lower end of the car stopping claw and the mounting positions on the side beam of the cage tray body corresponding to the return springs;
wherein each end of the return spring is connected to one of the mounting nuts, respectively.
5. The in-tank hydraulic car arrester based on cage automation as claimed in claim 1,
the car arrester also comprises a car arresting claw hand pulling mechanism which comprises a steel wire rope and a steel wire rope guide wheel;
the steel wire rope guide wheel is fixed on the side beam of the cage tray body; one end of the steel wire rope is connected with the bottom connecting handle of the car stopping claw, the steel wire rope is wound through the steel wire rope guide wheel, and the other end of the steel wire rope is fixed at one end of the car discharging side of the cage disc body;
the force application direction of the steel wire rope is the same as the force application direction of the hydraulic oil cylinder.
6. The in-tank hydraulic car arrester based on cage automation as claimed in claim 5,
one end of the hydraulic oil cylinder is connected with the bottom connecting handle of the car stopping claw through a connecting fork; wherein, the connecting fork is fixedly connected with the hydraulic oil cylinder, and a long strip-shaped pin shaft hole extending along the length direction of the connecting fork is arranged on the connecting fork.
7. The in-tank hydraulic car arrester based on cage automation as claimed in claim 5,
the two bottom connecting handles of the car stopping claw are respectively a first connecting handle and a second connecting handle;
circular holes are formed in the first connecting handle and the second connecting handle;
one end of the hydraulic oil cylinder is connected with the first connecting handle, and one end of the steel wire rope is connected with the second connecting handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123059189.6U CN216613671U (en) | 2021-12-07 | 2021-12-07 | In-tank hydraulic car arrester based on cage automation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123059189.6U CN216613671U (en) | 2021-12-07 | 2021-12-07 | In-tank hydraulic car arrester based on cage automation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216613671U true CN216613671U (en) | 2022-05-27 |
Family
ID=81701194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123059189.6U Active CN216613671U (en) | 2021-12-07 | 2021-12-07 | In-tank hydraulic car arrester based on cage automation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216613671U (en) |
-
2021
- 2021-12-07 CN CN202123059189.6U patent/CN216613671U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204627264U (en) | Automobile door electric push rod | |
| WO2018121233A1 (en) | Sliding plug door system for freight transport multiple unit | |
| CN201428473Y (en) | Inclined drift rope pressure catcher | |
| WO2002100754A1 (en) | Lifting apparatus without electric cable | |
| CN216613671U (en) | In-tank hydraulic car arrester based on cage automation | |
| CN2696944Y (en) | Hydraulic automatic normally closed rail clamping device | |
| CN109630196A (en) | A kind of tunnel protection door with automatic shutter function | |
| CN213085163U (en) | Two energy-absorbing formula car embracing devices that hinder in jar | |
| CN201923231U (en) | Turnover locking structure for driving cab | |
| CN201771376U (en) | Full-automatic safe vehicle window assembly | |
| CN202264798U (en) | In-tank car arrester capable of preventing mine car from deviating from tank | |
| CN209780952U (en) | Colliery is device with crashproof outburst prevention air door in pit | |
| CN201391504Y (en) | Safety hydraulic oil cylinder | |
| CN113859297B (en) | Wire rope fracture protection device for empty wagon shunting machine | |
| CN111469642A (en) | High impact resistance top sealing sliding door system suitable for cross-country vehicle | |
| CN108502689B (en) | In-tank anti-collision automatic locking device | |
| CN206450429U (en) | Chassis power measuring system | |
| CN212766255U (en) | Emergency brake device and rail with same | |
| CN210919133U (en) | Improved coal mine air door anti-collision car arrester | |
| CN209569032U (en) | A kind of tunnel protection door with automatic shutter function | |
| CN209493205U (en) | Automatic In-pot Car Retarder | |
| CN210101572U (en) | Water-flooded water-pressure ejection skylight for passenger car | |
| CN202124250U (en) | Wing opening type carriage | |
| CN216785423U (en) | Novel in-tank car stopping device | |
| CN213056831U (en) | Side-turning semitrailer safety supporting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |