CN220185153U - Ferrying device of door type hydraulic support for coal mine - Google Patents
Ferrying device of door type hydraulic support for coal mine Download PDFInfo
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- CN220185153U CN220185153U CN202321694160.1U CN202321694160U CN220185153U CN 220185153 U CN220185153 U CN 220185153U CN 202321694160 U CN202321694160 U CN 202321694160U CN 220185153 U CN220185153 U CN 220185153U
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- 239000003245 coal Substances 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 claims description 74
- 238000000034 method Methods 0.000 abstract description 13
- 238000005065 mining Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
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- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The utility model discloses a ferrying device of a door type hydraulic support for a coal mine, which comprises a sliding seat, a connecting seat, a swing arm, a swing driving piece, a supporting tray and a lifting driving piece, wherein the sliding seat and the connecting seat are slidably arranged, the swing arm is hinged with the sliding seat and the connecting seat at two ends, the swing driving piece is arranged between the swing arm and the sliding seat, and the lifting driving piece penetrates through the connecting seat and is connected with the supporting tray. The door type hydraulic support descends and contracts along the height direction, the sliding seat drives the bearing plate to slide synchronously until the bearing plate moves to the position right below the door type hydraulic support, and the lifting driving piece drives the bearing plate to ascend until the bearing plate supports the door type hydraulic support; the door type hydraulic support is retracted into the supporting leg and contracted along the width, and the swing driving piece drives the supporting disc to swing synchronously through the swing arm until the door type hydraulic support swings to the target position. The whole carrying process of the door type hydraulic support does not need to be manually carried, does not need to be repeatedly disassembled and assembled, can save a large amount of manpower and material resource cost, and is beneficial to improving the working efficiency of coal mining.
Description
Technical Field
The utility model relates to the technical field of coal mine supporting equipment, in particular to a coal mine supporting device. The utility model also relates to a ferrying device of the door type hydraulic support for the coal mine.
Background
The gate type hydraulic support has the advantages of simple structure, easy operation and the like, and a tunneling roadway under the coal mine usually utilizes a plurality of gate type hydraulic supports for temporary support. The door type hydraulic support is required to be sequentially carried in the coal mining process to achieve the purpose of cyclic support, but the door type hydraulic support is required to be disassembled firstly during carrying due to the large size of the door type hydraulic support, and then the door type hydraulic support is carried to a designated place for reassembling, the whole process involves lifting, disassembling, carrying, assembling, man-car matching and the like, the operation procedure is complex, the labor intensity is high, and the working efficiency of coal mining is seriously affected.
Disclosure of Invention
Therefore, the utility model aims to provide the ferrying device of the gate-type hydraulic support for the coal mine, which is capable of realizing efficient transfer of the gate-type hydraulic support by folding or unfolding, does not need repeated disassembly and assembly, does not need manual participation, and is beneficial to improving the working efficiency of coal mining.
The utility model provides a ferrying device of a door type hydraulic support for a coal mine, which comprises the following components:
a sliding seat which can be arranged in a sliding way;
a connecting seat;
swing arms with two ends respectively hinged with the sliding seat and the connecting seat;
the swing driving piece is arranged between the swing arm and the sliding seat and used for driving the swing arm to swing relative to the sliding seat;
a bearing tray for bearing the gate-type hydraulic support;
and the lifting driving piece penetrates through the connecting seat and is connected with the bearing plate and is used for driving the bearing plate to lift along the vertical direction.
Preferably, the sliding seat is slidably mounted on the supporting platform, and further comprises a sliding driving piece arranged between the sliding seat and the supporting platform and used for driving the sliding seat to slide relative to the supporting platform.
Preferably, a guide chute and a guide sliding block which are matched with each other are arranged between the sliding seat and the supporting platform.
Preferably, the two opposite sides of the supporting tray are respectively and integrally fixedly provided with a stop plate for preventing the falling of the gate type hydraulic support.
Preferably, the method further comprises:
the height detection piece is used for detecting whether the door type hydraulic support descends to a designated height;
the controller is respectively connected with the height detection piece and the sliding driving piece; when the height detection piece detects that the door type hydraulic support descends to the designated height, the controller is used for controlling the sliding driving piece to drive the sliding seat to slide relative to the supporting platform according to signals sent by the height detection piece.
Preferably, the method further comprises:
the positioning detection piece is used for detecting whether the bearing tray is aligned with the gate type hydraulic support; the positioning detection piece and the lifting driving piece are connected with the controller; when the positioning detection piece detects that the bearing plate is aligned with the gate-type hydraulic support, the controller is used for controlling the lifting driving piece to drive the bearing plate to lift along the vertical direction according to signals sent by the positioning detection piece.
Preferably, the method further comprises:
the bearing detection piece is used for detecting whether the bearing plate supports the gate type hydraulic support or not; the bearing detection piece is connected with the controller; when the bearing detection piece detects that the bearing tray supports the gate-type hydraulic support, the controller is used for controlling the lifting driving piece to stop according to signals sent by the bearing detection piece.
Preferably, the method further comprises:
a width detecting member for detecting whether the gate-type hydraulic bracket is contracted to a specified width;
the landing leg detection piece is used for detecting whether the landing leg of the door type hydraulic support is folded or not;
the width detection piece, the supporting leg detection piece and the swing driving piece are all connected with the controller;
when the width detection piece is contracted to the designated width from the gate type hydraulic support, and the support leg detection piece detects that the support leg of the gate type hydraulic support is retracted, the controller is used for controlling the swing driving piece to drive the swing arm to swing relative to the sliding seat according to signals sent by the width detection piece and the support leg detection piece.
Preferably, the method further comprises:
the position detection piece is used for detecting whether the swing arm drives the gate type hydraulic support to swing to a target position;
the position detection piece is connected with the controller; when the position detecting piece detects that the gate type hydraulic support swings to the target position, the controller is used for controlling the swing driving piece to stop according to signals fed back by the position detecting piece.
Preferably, the swing driving member is specifically a swing driving cylinder, and further includes:
a swing angle detecting member for detecting a swing angle of the swing arm;
an alarm;
the swing angle detection piece and the alarm are connected with the controller; when the swing angle detection piece detects that the swing angle of the swing arm exceeds a preset angle, the controller is used for starting the alarm according to the signal sent by the swing angle detection piece.
Compared with the background art, the ferrying device of the door type hydraulic support for the coal mine comprises a sliding seat, a connecting seat, a swing arm, a swing driving piece, a bearing plate and a lifting driving piece, wherein the swing arm is hinged between the sliding seat and the connecting seat, the bearing plate is arranged on the lifting driving piece, and the lifting driving piece penetrates through the connecting seat.
The door type hydraulic support descends and contracts along the height direction, the sliding seat drives the bearing plate to slide synchronously until the bearing plate moves to the position right below the door type hydraulic support, and the lifting driving piece drives the bearing plate to ascend until the bearing plate supports the door type hydraulic support; the door type hydraulic support is retracted into the supporting leg and contracted along the width, and the swing driving piece drives the supporting disc to swing synchronously through the swing arm until the door type hydraulic support swings to the target position.
According to the door type hydraulic support, the whole carrying process of the door type hydraulic support does not need to be manually carried, repeated disassembly and assembly are not needed, a large amount of manpower and material resource cost can be saved, and the working efficiency of coal mining is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a ferrying device of a portal hydraulic support for coal mines, provided by an embodiment of the utility model;
FIG. 2 is a state diagram of a ferrying device of a portal hydraulic support for coal mine in a contracted state and an expanded state according to an embodiment of the present utility model;
FIG. 3 is a diagram showing a state where a ferrying device of a portal hydraulic support for coal mine according to an embodiment of the present utility model holds the portal hydraulic support;
FIG. 4 is a front view of FIG. 3;
fig. 5 is a state diagram of a ferrying device of a gate-type hydraulic support for a coal mine according to an embodiment of the present utility model when the gate-type hydraulic support is transferred to a target position.
Wherein the solid line in fig. 2 represents the contracted state diagram of the ferry device, and the broken line represents the expanded state diagram of the ferry device.
The reference numerals are as follows:
the device comprises a sliding seat 1, a guide sliding block 11, a connecting seat 2, a swinging arm 3, a swinging driving piece 4, a bearing disc 5, a stop plate 51, a lifting driving piece 6, a door type hydraulic support 7 and a supporting platform 8.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In order that those skilled in the art will better understand the present utility model, the following description will be given in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model discloses a ferrying device of a door type hydraulic support for a coal mine, which comprises a sliding seat 1, a connecting seat 2, a swinging arm 3, a swinging driving piece 4, a bearing plate 5 and a lifting driving piece 6 as shown in figure 1.
The sliding seat 1 is slidably arranged, mainly for supporting, and adjusts the position of the gate type hydraulic support 7 by linear sliding. The door-type hydraulic support 7's in this paper structure is the door style of calligraphy, including two parallel arrangement longerons and perpendicular connection in the crossbeam between two longerons, wherein, the bottom of two longerons all is equipped with the landing leg that can follow vertical direction and stretch out and draw back, and the both ends of crossbeam respectively with two longerons telescopic connection, the height and the width of door-type hydraulic support 7 all can realize adjusting like this, ensure that door-type hydraulic support 7 is transferred to target position by above-mentioned ferry device with complete contraction state, avoid waiting to transport door-type hydraulic support 7 and other door-type hydraulic support 7 of normal work to collide.
The connecting seat 2 can be connected with the swing arm 3 and can also provide support for the lifting driving piece 6. Two ends of the swing arm 3 are respectively hinged with the sliding seat 1 and the connecting seat 2, and the swing arm 3 adjusts the position of the gate-type hydraulic support 7 through swinging. The lifting driving piece 6 penetrates through the connecting seat 2 and is connected with the bearing plate 5 and is used for driving the bearing plate 5 to lift in the vertical direction.
Specifically, two lifting driving pieces 6 are installed on the connecting seat 2, and the two lifting driving pieces 6 are symmetrically arranged at two ends of the connecting seat 2. Each lifting driving member 6 may be a hydraulic cylinder, and the cylinders of the two lifting driving members 6 are fixed at the bottom end of the connecting seat 2, and the piston rods of the two lifting driving members can slide through the connecting seat 2. The bottom of connecting seat 2 still is equipped with the mounting groove, and swing arm 3's one end is rotated through round pin axle and is connected with the mounting groove, and its other end is rotated through round pin axle and is connected with sliding seat 1. Of course, the number of the lifting driving members 6 may be adjusted according to the specifications of the gate type hydraulic bracket 7, and is not particularly limited herein.
The swing driving piece 4 is arranged between the swing arm 3 and the sliding seat 1 and is used for driving the swing arm 3 to swing relative to the sliding seat 1. However, it should be noted that, during the swing of the swing arm 3, the supporting plate 5 is always kept in a horizontal state, so as to avoid serious accidents caused by side turning of the gate-type hydraulic support 7. The swing drive 4 may specifically be a hydraulic cylinder, but is not limited thereto. The cylinder barrel of the swing driving piece 4 is rotationally connected with the base, and the piston rod of the swing driving piece is rotationally connected with the swing arm 3. The supporting tray 5 is arranged at the top of the lifting driving piece 6 and is used for supporting the door type hydraulic support 7. The sliding seat 1, the connecting seat 2, the swing arm 3 and the supporting tray 5 can be formed by welding common steel plates, and of course, the materials and the processing modes of the four are not limited to the above.
As shown in fig. 2 to 5, in the initial state, the ferrying device is in a contracted state, i.e. the angle between the swing arm 3 and the sliding seat 1 is minimal. As shown in the solid line portion of fig. 2, when the swing arm 3 swings to the far right, the state in which the ferrying device is in this time is the contracted state. As shown in the broken line portion of fig. 2, when the swing arm 3 swings to the leftmost side, the state in which the ferrying device is in this time is the deployed state.
During transferring, the gate type hydraulic support 7 descends and contracts along the height direction, the ferrying device is in a contracted state, the sliding seat 1 drives the supporting tray 5 to slide synchronously until the supporting tray 5 moves to the position right below the gate type hydraulic support 7, and the lifting driving piece 6 drives the supporting tray 5 to ascend until the supporting tray 5 supports the gate type hydraulic support 7; at the moment, the door type hydraulic support 7 is retracted into the supporting leg and contracted along the width, the swing driving piece 4 drives the carrying tray 5 to swing synchronously through the swing arm 3 until the door type hydraulic support 7 swings to the target position, the ferrying device is in the unfolding state, and the door type hydraulic support 7 is unfolded at the target position to complete supporting.
In summary, the whole carrying process of the portal hydraulic support 7 does not need to be manually carried, does not need repeated disassembly and assembly, can save a great deal of manpower and material resource cost, and is beneficial to improving the working efficiency of coal mining.
The sliding seat 1 is slidably mounted on the supporting platform 8 to provide support for the sliding seat 1. The ferrying device further comprises a sliding driving piece arranged between the sliding seat 1 and the supporting platform 8 and used for driving the sliding seat 1 to slide relative to the supporting platform 8. The slide driver may be, but is not limited to, a hydraulic cylinder.
A guide chute and a guide sliding block 11 which are matched with each other are arranged between the sliding seat 1 and the supporting platform 8 and are used for guiding the sliding seat 1 to slide smoothly along the line relative to the supporting platform 8. Specifically, the guiding chute is a rectangular chute arranged on the supporting platform 8, and the guiding slide block 11 is a rectangular slide block fixedly arranged at the bottom of the sliding seat 1. Of course, the cross sections of both the guide rail and the guide slider 11 may also be dovetail-shaped, and are not particularly limited herein.
The two opposite sides of the tray 5 are respectively and integrally provided with a baffle plate 51 for preventing the falling of the door type hydraulic support 7 in the transferring process.
The ferry device further comprises a height detecting member and a controller, wherein the height detecting member is used for detecting whether the door-type hydraulic support 7 descends to a designated height, and the height detecting member can be a distance sensor, a contact sensor or the like, and is not limited in detail herein. The controller is connected with the height detection piece and the sliding driving piece respectively, when the height detection piece detects that the door type hydraulic support 7 descends to the designated height, the height detection piece sends a signal to the controller, and after the controller receives the signal, the sliding driving piece is controlled to drive the sliding seat 1 to slide relative to the supporting platform 8, so that the sliding seat 1 can automatically slide. The designated height is herein smaller than the height of the door-type hydraulic support 7 when it is normally supported.
The ferrying device further comprises a positioning detection member for detecting whether the carrying tray 5 is aligned with the gate type hydraulic support 7, and the positioning detection member can be a laser sensor or a photoelectric sensor, but is not limited thereto. The positioning detection piece and the lifting driving piece 6 are connected with the controller. When the positioning detection piece detects that the bearing plate 5 is aligned with the gate-type hydraulic support 7, the positioning detection piece sends a signal to the controller, and after the controller receives the signal, the lifting driving piece 6 is controlled to drive the bearing plate 5 to lift up along the vertical direction, so that the bearing plate 5 can automatically lift up.
The ferry device further comprises a bearing detection member for detecting whether the bearing tray 5 supports the gate-type hydraulic support 7, and the bearing detection member can be a pressure sensor, a contact sensor, a distance sensor or the like, and is not particularly limited herein. The bearing detection piece is connected with the controller; when the bearing detection piece detects that the bearing plate 5 supports the gate-type hydraulic support 7, the bearing detection piece sends a signal to the controller, and the controller receives the signal and then controls the lifting driving piece 6 to automatically stop.
The ferry device further includes a width detecting member for detecting whether the gate-type hydraulic support 7 is contracted to a specified width and a leg detecting member for detecting whether the legs of the gate-type hydraulic support 7 are contracted, and the width detecting member and the leg detecting member may be distance sensors, but are not limited thereto. The width detection piece, the supporting leg detection piece and the swinging driving piece 4 are all connected with the controller. When the width detection piece is contracted to the designated width from the gate type hydraulic support 7, and the support leg detection piece detects that the support leg of the gate type hydraulic support 7 is retracted, the width detection piece and the support leg detection piece send signals to the controller at the same time, and after receiving the signals, the controller controls the swing driving piece 4 to drive the swing arm 3 to swing relative to the sliding seat 1, so that the swing arm 3 can swing automatically. The designated width is herein smaller than the width of the door-type hydraulic support 7 when it is normally supported.
The ferrying device further comprises a position detecting member connected with the controller, wherein the position detecting member is used for detecting whether the swing arm 3 drives the gate type hydraulic support 7 to swing to a target position, and the position detecting member can be a position sensor or a travel switch and the like, and is not limited in detail. When the position detecting member detects that the gate type hydraulic support 7 swings to the target position, the position detecting member sends a signal to the controller, and the controller receives the signal and then controls the swing driving member 4 to stop acting.
The combination setting of multiple detection piece makes ferry device realize automatic transfer gate-type hydraulic support 7, so can transfer complete department's hydraulic support 7 in proper order, degree of automation is high, and the manual participation degree is low, still does benefit to improvement work efficiency.
The ferry device further comprises an alarm and a swing angle detection piece for detecting the swing angle of the swing arm 3, wherein the swing angle detection piece and the alarm are connected with the controller. When the swing angle detection piece detects that the swing angle of the swing arm 3 exceeds a preset angle, the swing angle detection piece sends a signal to the controller, after the controller receives the signal, the controller starts an alarm, and the alarm automatically alarms to remind a worker to stop and overhaul, so that accidents caused by abnormal operation of the swing driving piece 4 are avoided, and the safety is improved.
The controller should include a signal receiving portion for receiving an electric signal transmitted from a detecting member such as a height detecting member, a positioning detecting member, a bearing detecting member, or a width detecting member, a signal determining portion electrically connected to the signal receiving portion so that the signal determining portion is for determining whether or not a signal received by the signal receiving portion is a trigger signal, and a signal transmitting portion electrically connected to the signal determining portion so that the signal transmitting portion transmits a determination signal generated by the signal determining portion to an executing member such as the slide driving member, the lift driving member 6, or the swing driving member 4. The specific arrangement modes of the signal receiving part, the signal judging part and the signal transmitting part can refer to the prior art; in the utility model, the application scenes of the three are only changed, and the utility model does not substantially improve the application scenes. Obviously, the controller with the structure is widely applied to the existing automatic control equipment, such as MCU, DSP or singlechip. The key point of the utility model is that the controller combines each detection piece and each execution piece in a pairwise corresponding way.
The ferrying device of the door type hydraulic support for the coal mine provided by the utility model is described in detail, and specific examples are applied to the principle and the implementation mode of the utility model, and the description of the examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.
Claims (10)
1. The utility model provides a ferry device of door-type hydraulic support for colliery which characterized in that includes:
a sliding seat (1) which can be arranged in a sliding way;
a connecting seat (2);
swing arms (3) with two ends respectively hinged with the sliding seat (1) and the connecting seat (2);
the swing driving piece (4) is arranged between the swing arm (3) and the sliding seat (1) and is used for driving the swing arm (3) to swing relative to the sliding seat (1);
a bearing plate (5) for bearing the gate-type hydraulic support (7);
and a lifting driving piece (6) which passes through the connecting seat (2) and is connected with the bearing plate (5) and is used for driving the bearing plate (5) to lift along the vertical direction.
2. The ferrying device of a portal hydraulic support for coal mine according to claim 1, wherein the sliding seat (1) is slidably mounted on a supporting platform (8), and further comprising a sliding driving member disposed between the sliding seat (1) and the supporting platform (8) and configured to drive the sliding seat (1) to slide relative to the supporting platform (8).
3. The ferrying device of the portal hydraulic support for the coal mine according to claim 2, wherein a guiding chute and a guiding sliding block (11) which are matched with each other are arranged between the sliding seat (1) and the supporting platform (8).
4. The ferrying device of the door type hydraulic support for the coal mine according to claim 2, wherein the two opposite sides of the bearing plate (5) are respectively and integrally fixedly provided with a stop plate (51) for preventing the door type hydraulic support (7) from falling.
5. The ferrying apparatus of a gate hydraulic support for coal mines according to any one of claims 2 to 4, further comprising:
a height detecting member for detecting whether the gate-type hydraulic mount (7) is lowered to a specified height;
the controller is respectively connected with the height detection piece and the sliding driving piece; when the height detection piece detects that the door type hydraulic support (7) descends to the designated height, the controller is used for controlling the sliding driving piece to drive the sliding seat (1) to slide relative to the supporting platform (8) according to signals sent by the height detection piece.
6. The ferrying device of a gate hydraulic support for coal mines according to claim 5, further comprising:
positioning detection means for detecting whether the support plate (5) is aligned with the portal hydraulic bracket (7); the positioning detection piece and the lifting driving piece (6) are connected with the controller; when the positioning detection part detects that the bearing plate (5) is aligned to the gate-type hydraulic support (7), the controller is used for controlling the lifting driving part (6) to drive the bearing plate (5) to lift along the vertical direction according to signals sent by the positioning detection part.
7. The ferrying device of a gate hydraulic support for coal mines according to claim 6, further comprising:
a support detecting member for detecting whether the support tray (5) supports the gate-type hydraulic support (7); the bearing detection piece is connected with the controller; when the bearing detection part detects that the bearing plate (5) supports the door type hydraulic support (7), the controller is used for controlling the lifting driving part (6) to stop according to signals sent by the bearing detection part.
8. The ferrying device of a gate hydraulic support for coal mines according to claim 7, further comprising:
a width detecting member for detecting whether the gate type hydraulic mount (7) is contracted to a specified width;
the landing leg detection piece is used for detecting whether the landing leg of the door type hydraulic support (7) is folded or not;
the width detection piece, the supporting leg detection piece and the swing driving piece (4) are all connected with the controller;
when the width detection piece is contracted to the designated width from the door type hydraulic support (7), and the support leg detection piece detects that the support leg of the door type hydraulic support (7) is retracted, the controller is used for controlling the swing driving piece (4) to drive the swing arm (3) to swing relative to the sliding seat (1) according to signals sent by the width detection piece and the support leg detection piece.
9. The ferrying device of a gate hydraulic support for coal mines according to claim 8, further comprising:
the position detection piece is used for detecting whether the swing arm (3) drives the gate type hydraulic support (7) to swing to a target position;
the position detection piece is connected with the controller; when the position detection part detects that the gate type hydraulic support (7) swings to the target position, the controller is used for controlling the swing driving part (4) to stop acting according to signals fed back by the position detection part.
10. The ferrying device of a portal hydraulic support for coal mine according to claim 8, wherein the swing driving member (4) is specifically a swing driving cylinder, further comprising:
a swing angle detection member for detecting a swing angle of the swing arm (3);
an alarm;
the swing angle detection piece and the alarm are connected with the controller; when the swing angle detection piece detects that the swing angle of the swing arm (3) exceeds a preset angle, the controller is used for starting the alarm according to the signal sent by the swing angle detection piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321694160.1U CN220185153U (en) | 2023-06-30 | 2023-06-30 | Ferrying device of door type hydraulic support for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321694160.1U CN220185153U (en) | 2023-06-30 | 2023-06-30 | Ferrying device of door type hydraulic support for coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220185153U true CN220185153U (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321694160.1U Active CN220185153U (en) | 2023-06-30 | 2023-06-30 | Ferrying device of door type hydraulic support for coal mine |
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| Country | Link |
|---|---|
| CN (1) | CN220185153U (en) |
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2023
- 2023-06-30 CN CN202321694160.1U patent/CN220185153U/en active Active
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