CN211812116U - Lapping trolley for conveyor and scraper conveyor - Google Patents
Lapping trolley for conveyor and scraper conveyor Download PDFInfo
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- CN211812116U CN211812116U CN202020241524.0U CN202020241524U CN211812116U CN 211812116 U CN211812116 U CN 211812116U CN 202020241524 U CN202020241524 U CN 202020241524U CN 211812116 U CN211812116 U CN 211812116U
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- 230000007246 mechanism Effects 0.000 claims abstract description 51
- 238000005096 rolling process Methods 0.000 claims abstract description 23
- 239000003921 oil Substances 0.000 claims description 48
- 239000010720 hydraulic oil Substances 0.000 claims description 44
- 239000003245 coal Substances 0.000 abstract description 14
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The application discloses a lapping trolley for a conveyor and a scraper conveyor, which comprises a frame body, a travelling mechanism and a steering mechanism, wherein the travelling mechanism is rotatably connected below the frame body; the walking mechanism comprises a left supporting column and a right supporting column, the left supporting column and the right supporting column are respectively installed on two sides of the rack body in the width direction, and the outer sides of the lower ends of the left supporting column and the right supporting column are both rotatably connected with at least one rolling wheel; the walking mechanism is spanned on a chute of the conveyor, and the left supporting column and the right supporting column are respectively positioned on two sides of the chute; the steering mechanism is used for controlling the left-right steering of the rack body. The running gear of overlap joint dolly rides and strides on the chute of conveyer in this application, and two support columns are located the both sides of the chute of conveyer, and the roll wheel clamp of both sides is in the both sides of chute, and difficult emergence is turned on one's side and is fallen to say, and factor of safety is higher, has also increaseed the coal space of crossing of conveyer simultaneously.
Description
Technical Field
The application relates to the technical field of mining equipment, in particular to an overlapping trolley for a conveyor and a scraper conveyor.
Background
When the comprehensive mechanical tunneling construction operation is performed underground in a mine, a fully-mechanized tunneling machine is generally adopted to cut coal, a first conveyor and a second conveyor of the fully-mechanized tunneling machine are used for loading and transporting the coal to a rear lane, and the rear lane is overlapped with a belt conveyor or a scraper conveyor to discharge slag. The lapping mode of the second conveyor of the roadheader and the rear lane scraper conveyor generally adopts a second conveyor rail trolley to roll and walk on a chute of the scraper conveyor. This walking mode has great disadvantages: firstly, when the chute of the scraper conveyor is fluctuated or two sides of the chute are uneven, the second conveyor can be turned over laterally; secondly, large coal blocks at the head of the working face are likely to be blocked at a guide rail wheel of a rail trolley of a second conveyor to cause transportation blockage, so that production is influenced; and thirdly, the second conveyor rail trolley is easy to fall off when rolling on the chute of the scraper conveyor, so that a special person needs to take care of the whole conveying process, and great potential safety hazards exist. Therefore, it is desirable to provide a reliable landing bogie for conveyors and scraper conveyors that is not prone to rollover.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the not enough of prior art, provide a be difficult for turning on one's side, the reliable overlap joint dolly that is used for conveyer and scraper conveyor of walking.
The technical scheme of the application provides an overlapping trolley for a conveyor and a scraper conveyor, which comprises a rack body, a travelling mechanism and a steering mechanism, wherein the travelling mechanism is rotatably connected below the rack body;
the travelling mechanism comprises a left supporting column and a right supporting column, the left supporting column and the right supporting column are respectively installed on two sides of the rack body in the width direction, and the outer sides of the lower ends of the left supporting column and the right supporting column are rotatably connected with at least one rolling wheel;
the walking mechanism is spanned on a chute of the conveyor, and the left supporting column and the right supporting column are respectively positioned on two sides of the chute;
the steering mechanism is used for controlling the rack body to steer left and right.
Further, a cross beam is connected between the left supporting column and the right supporting column and is vertically connected to the upper ends of the left supporting column and the right supporting column.
Furthermore, the outer sides of the lower ends of the left support column and the right support column are respectively rotatably connected with at least two rolling wheels, and the rolling wheels are arranged along the length direction of the rack body.
Further, each rolling wheel is installed at the lower end of the left supporting column or the right supporting column through a rotating shaft.
Further, the steering mechanism comprises a control system and two hydraulic oil cylinders;
the two hydraulic oil cylinders are positioned on two sides of the frame body in the width direction, one end of each hydraulic oil cylinder is fixedly connected with the frame body, and the other end of each hydraulic oil cylinder is rotatably connected with the travelling mechanism;
the control system drives one of the hydraulic oil cylinders to extend, and simultaneously drives the other hydraulic oil cylinder to retract.
Further, running gear still includes the revolving platform, the revolving platform is rotationally installed the below of frame body, left branch dagger with right branch dagger fixed mounting is in the below of revolving platform, steering mechanism connects the revolving platform with the frame body for drive the frame body is controlled and is turned to.
Furthermore, the rotary table is rotatably connected with the rack body through a pin shaft, the pin shaft is vertically arranged, and the rotary table rotates in the horizontal direction by taking the pin shaft as a shaft under the driving of the steering mechanism.
Furthermore, the fixed end of each hydraulic oil cylinder is rotatably connected with the rotary table, and the telescopic end of each hydraulic oil cylinder is fixedly connected with the rack body.
Further, an oil cylinder installation part extends downwards from the rack body, the hydraulic oil cylinder is horizontally arranged, the fixed end is connected with the rotary table, and the telescopic end is connected with the oil cylinder installation part.
Furthermore, the control system comprises an oil tank, a reversing valve and a hydraulic pump, and the two hydraulic oil cylinders are respectively a left hydraulic oil cylinder and a right hydraulic oil cylinder;
the hydraulic pump is communicated with an oil inlet of the reversing valve, and the oil tank is communicated with an oil return port of the reversing valve;
a first working oil port of the reversing valve is communicated with an oil inlet of the left hydraulic oil cylinder and an oil outlet of the right hydraulic oil cylinder; and a second working oil port of the reversing valve is communicated with an oil outlet of the left hydraulic oil cylinder and an oil inlet of the right hydraulic oil cylinder.
After adopting above-mentioned technical scheme, have following beneficial effect:
according to the application, the travelling mechanism of the lapping trolley straddles on the chute of the conveyor, the left supporting column and the right supporting column are respectively positioned on two sides of the chute of the conveyor, the rolling wheels on two sides are clamped on two sides of the chute, so that the side turning and the lane falling are not easy to occur, the safety coefficient is high, and the coal passing space of the conveyor is enlarged;
the two hydraulic oil cylinders are used for controlling the direction change of the lapping trolley, and the direction change of the lapping trolley can be realized only by controlling the reversing valve, so that the labor intensity of operators is reduced.
Drawings
The disclosure of the present application will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. In the figure:
fig. 1 is a front view of an embodiment of the present invention;
fig. 2 is a side view of an embodiment of the present invention;
fig. 3 is a schematic connection diagram of a steering mechanism according to an embodiment of the present invention.
Reference symbol comparison table:
the oil cylinder mounting structure comprises a rack body 01, an oil cylinder mounting part 11, a reinforcing plate 12 and a pin shaft 13;
the device comprises a travelling mechanism 02, a left support column 21a, a right support column 21b, a rotating shaft 211, rolling wheels 22, a cross beam 23 and a rotary table 24;
a steering mechanism 03, a left hydraulic oil cylinder 31a, a right hydraulic oil cylinder 21b, an oil tank 32 and a reversing valve 33;
a chute 04.
Detailed Description
Embodiments of the present application are further described below with reference to the accompanying drawings.
It is easily understood that according to the technical solutions of the present application, those skilled in the art can substitute various structures and implementations without changing the spirit of the present application. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present application, and should not be construed as limiting or restricting the technical solutions of the present application in their entirety.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
The lapping trolley for the conveyor and the scraper conveyor in the embodiment, as shown in fig. 1, comprises a frame body 01, a traveling mechanism 02 rotatably connected below the frame body 01, and a steering mechanism 03 connecting the frame body 01 and the traveling mechanism 02;
the traveling mechanism 02 comprises a left support column 21a and a right support column 21b, the left support column 21a and the right support column 21b are respectively installed on two sides of the rack body 01 in the width direction, and the outer sides of the lower ends of the left support column 21a and the right support column 21b are respectively rotatably connected with a rolling wheel 22;
the walking mechanism 02 straddles on a chute 04 of the conveyor, and the left supporting column 21 and the right supporting column 21b are respectively positioned on two sides of the chute 04;
the steering mechanism 03 is used for controlling the left-right steering of the rack body 01.
Specifically, when the roadheader cuts the coal breakage, the roadheader loads and transports the coal breakage back lane through first conveyer, second conveyer, and the back lane sets up scraper conveyor and slags tap, and the overlap joint dolly overlap joint of this application is between second conveyer and scraper conveyor, and reciprocating motion through the overlap joint dolly carries the coal breakage to scraper conveyor from the second conveyer.
The upper part of the frame body 01 of the lapping trolley is fixedly connected with the coal dropping bearing part of the second conveyor, and the coal dropping bearing part is driven to move by the traveling mechanism 02 of the frame body 01 so as to convey the coal dropping on the coal dropping bearing part to the scraper conveyor. The traveling mechanism 02 and the rack body 01 are rotatably connected, the traveling mechanism 02 moves along a chute 04 of the scraper conveyor, and when the direction of the chute is required, the traveling mechanism 02 drives the rack body 01 to turn left and right, and the coal dropping bearing part above the rack body 01 is driven to turn.
In this application, the running gear 02 with the overlap joint dolly sets up to left branch dagger 21a and right branch dagger 21b, all install the wheel 22 that rolls in the lower extreme outside of left branch dagger 21 and right branch dagger 21b, make two wheels 22 that roll be located the width direction's of frame body 01 both sides, running gear 02 is "nearly" style of calligraphy in frame body 01 below, ride and stride on the chute 04 of conveyer, two wheels 22 that roll are located the turn-ups of the both sides below of chute 04 respectively, move along the length direction of chute 04. The lapping mode that the existing rail trolley rolls and runs above the chute 04 is replaced. Because left branch dagger 21a and right branch dagger 21b press from both sides the both sides motion at chute 04, chute 04 has played the effect of direction to running gear 02, has prevented that running gear 02 from taking place to fall to say to because the chute 04 that is located between left branch dagger 21a and the right branch dagger 21b has certain height, when running gear 02 because turn over when falling to one side, chute 04 has played the supporting role to two branch daggers 21, can effectively prevent that running gear 02 from turning on one side. Meanwhile, the occupied space of the chute 04 is reduced, and the coal passing space of the scraper conveyor is increased.
Further, a cross beam 23 is connected between the left support column 21a and the right support column 21b, and the cross beam 23 is vertically connected to the upper ends of the left support column 21 and the right support column 21 b.
Specifically, left branch dagger 21a and right branch dagger 21b are perpendicular with frame body 01, and under operating condition, frame body 01 level sets up, and left branch dagger 21a and right branch dagger 21b are vertical. The cross member 23 is horizontally disposed and connected between the left support column 21a and the right support column 21b to reinforce the connection strength of the left support column 21a and the right support column 21b and limit the distance between the left support column 21a and the right support column 21 b. Moreover, since the chute 04 is accommodated between the left support column 21a and the right support column 21b, the cross beam 23 is connected to the upper ends of the left support column 21a and the right support column 21b, and avoids interference with the upper surface of the chute 04.
Further, each of the rolling wheels 22 is mounted at the lower end of the left support column 21a or the right support column 21b through a rotating shaft 211.
Specifically, taking the left support pillar 21a as an example, the rotating shaft 211 extends outward from the lower end of the left support pillar 21a, the rotating shaft 211 is perpendicular to the left support pillar 21a, and the axle center mounting hole of the rolling wheel 22 is sleeved outside the rotating shaft 211, so that the rolling wheel 22 can rotate around the rotating shaft 211. In this embodiment, the rolling wheel 22 is a tire. The structure of the right support column 21b is the same as that of the left support column 21a, and the two are symmetrically arranged on the left side and the right side of the rack body 01.
Optionally, two or more rolling wheels 22 are rotatably connected to the outer sides of the lower ends of the left support column 21a and the right support column 21b, and the rolling wheels 22 are arranged along the length direction of the rack body 01. It should be noted that the left support column 21a and the right support column 21b are symmetrical.
Specifically, if each support column 21 is connected to two or more rolling wheels 22, the lower end of each support column 21 is provided with a plurality of rotating shafts 211, so that the rolling wheels 22 connected to the rotating shafts 211 are arranged along the length direction of the rack body 01. It should be noted that the diameter and size of the rolling wheels 22 may vary, as long as each rolling wheel 22 is maintained to roll outside the chute 04.
Further, the steering mechanism 03 comprises a control system and two hydraulic oil cylinders 31;
as shown in fig. 1 and 2, two hydraulic cylinders 31 are located on two sides of the frame body 01 in the width direction, one end of each hydraulic cylinder 31 is fixedly connected to the frame body 01, and the other end is rotatably connected to the traveling mechanism 02;
the control system drives one of hydraulic rams 31 to extend while driving the other hydraulic ram 31 to retract.
Specifically, the turning of the lap joint trolley is realized through two hydraulic oil cylinders 31 in the embodiment, and the two hydraulic oil cylinders 31 are located on two sides of the width direction of the rack body 01 and are telescopic in the length direction of the rack body 01.
The left-right direction in fig. 1 is the width direction of the lap joint trolley, wherein the left hydraulic cylinder 31a is arranged on the left side, the right hydraulic cylinder 31b is arranged on the right side, when the left hydraulic cylinder 31a extends, the right hydraulic cylinder 31b retracts, the extending amount of the left hydraulic cylinder 31a is the same as the retracting amount of the right hydraulic cylinder 31b, and at this time, the left hydraulic cylinder 31a and the right hydraulic cylinder 31b and the rack body 01 rotate towards the right side on the horizontal plane. When left hydraulic cylinder 31a is retracted and right hydraulic cylinder 31b is extended, it is rotated to the left. Therefore, the steering of the lap car can be realized by controlling the extension and retraction of the two hydraulic cylinders 31.
Further, as shown in fig. 1 and 2, the traveling mechanism 02 further includes a revolving platform 24, the revolving platform 24 is rotatably installed below the rack body 01, the left support column 21a and the right support column 21b are fixedly installed below the revolving platform 24, and the steering mechanism 03 is installed on the revolving platform 24 and used for driving the traveling mechanism 02 to steer left and right.
Specifically, the turntable 24 is connected with the rack body 01 through a pin shaft 13, the pin shaft 13 is vertically arranged, and the turntable 24 rotates on a horizontal plane by taking the pin shaft 13 as an axis under the driving of the steering mechanism 03.
The axis of the pin shaft 13 is along the vertical direction, and connects the rotary table 24 and the frame body 01. The rotary table 24 is fixedly connected with the traveling mechanism 02, and the rotary table 24 is driven by the steering mechanism 03 to rotate in the horizontal direction by taking the pin shaft 13 as an axis, so that the steering of the lapping trolley is realized.
Further, the fixed end of each hydraulic cylinder 31 is rotatably connected with the rotary table 24, and the telescopic end is fixedly connected with the rack body 01.
Specifically, fig. 2 shows a schematic connection diagram of the left hydraulic cylinder 31a, the connection mode of the right hydraulic cylinder 31b and the left hydraulic cylinder 31a is the same, the two hydraulic cylinders 31 are symmetrically arranged on two sides of the frame body 01, and both the two hydraulic cylinders 31 can rotate on a horizontal plane relative to the revolving platform 24.
In this embodiment, when the left hydraulic cylinder 31a extends, the right hydraulic cylinder 31b retracts, and the frame body 01 rotates toward one side of the right hydraulic cylinder 31 b; when left hydraulic cylinder 31a retracts, right hydraulic cylinder 31b extends, and the entire frame body 01 rotates toward the side of left hydraulic cylinder 31 a.
Optionally, the fixed end of the hydraulic cylinder may be fixedly connected to the frame body 01, and the telescopic end may be rotatably connected to the turntable 24.
Further, the frame body 01 extends downwards to form an oil cylinder mounting part 11, the hydraulic oil cylinder 31 is horizontally arranged, a fixed end is connected with the rotary table, and a telescopic end is connected with the oil cylinder mounting part 11.
Specifically, as shown in fig. 2, in order to enable hydraulic cylinder 31 to extend and retract in the horizontal direction, frame body 01 extends downward to form a cylinder mounting portion 11, cylinder mounting portion 11 is a bar-shaped mounting plate, the bar-shaped mounting plate is perpendicular to frame body 01, and the extending and retracting end of hydraulic cylinder 31 is fixed on the bar-shaped mounting plate through a bolt.
In this embodiment, for the joint strength who strengthens the bar mounting panel, have connected reinforcing plate 12 in one side of bar mounting panel, reinforcing plate 12 one end fixed connection bar mounting panel, the other end is fixed on frame body 01, forms the triangle-shaped structure with the bar mounting panel overlap joint.
Further, as shown in fig. 3, the control system includes an oil tank 32, a reversing valve 33 and a hydraulic pump (not shown in the figure), and the two hydraulic cylinders are a left hydraulic cylinder 31a and a right hydraulic cylinder 31b respectively;
the hydraulic pump is communicated with an oil inlet P of the reversing valve 33, and the oil tank 32 is communicated with an oil return port T of the reversing valve 33;
a first working oil port A of the reversing valve 33 is communicated with an oil inlet of the left hydraulic oil cylinder 31a and an oil outlet of the right hydraulic oil cylinder 31 b; and a second working oil port B of the reversing valve 33 is communicated with an oil outlet of the left hydraulic oil cylinder 31a and an oil inlet of the right hydraulic oil cylinder 31B.
Specifically, the reversing valve 33 is a two-position four-way reversing valve, and the two hydraulic cylinders 31 are extended and retracted by controlling the on and off of two working oil paths in the reversing valve 33. When the oil way of the first working oil port A is controlled to be communicated, the hydraulic pump inputs oil into an oil inlet of the left hydraulic oil cylinder 31a and an oil outlet of the right hydraulic oil cylinder 31b, so that the left hydraulic oil cylinder 31a extends out, and the right hydraulic oil cylinder 31b retracts; when the oil path of the second working oil port B is controlled to be communicated, the hydraulic pump inputs oil into the oil outlet of the left hydraulic oil cylinder 31a and the oil inlet of the right hydraulic oil cylinder 31B, so that the left hydraulic oil cylinder 31a retracts, and the right hydraulic oil cylinder 31B extends.
Alternatively, the directional valve 33 may be manually or electrically controlled.
In the lapping trolley for the conveyor and the scraper conveyor in the embodiment, the travelling mechanisms 02 straddle two sides of the chute 04 of the scraper conveyor, so that the lapping trolley is effectively prevented from falling off the track and turning on one side; and steering mechanism 03 adopts hydraulic control's mode, only needs control switching-over valve can realize the turning to of overlap joint dolly, controls the convenience.
What has been described above is merely the principles and preferred embodiments of the present application. It should be noted that, for a person skilled in the art, several other modifications can be made on the basis of the principle of the present application, and these should also be considered as the scope of protection of the present application.
Claims (10)
1. A lapping trolley for a conveyor and a scraper conveyor is characterized by comprising a frame body, a travelling mechanism and a steering mechanism, wherein the travelling mechanism is rotatably connected below the frame body;
the travelling mechanism comprises a left supporting column and a right supporting column, the left supporting column and the right supporting column are respectively installed on two sides of the rack body in the width direction, and the outer sides of the lower ends of the left supporting column and the right supporting column are rotatably connected with at least one rolling wheel;
the walking mechanism is spanned on a chute of the conveyor, and the left supporting column and the right supporting column are respectively positioned on two sides of the chute;
the steering mechanism is used for controlling the rack body to steer left and right.
2. The lapping trolley for conveyors and scraper conveyors of claim 1, wherein a cross beam is further connected between the left support column and the right support column, and the cross beam is vertically connected to the upper ends of the left support column and the right support column.
3. The lapping trolley for conveyors and scraper conveyors as claimed in claim 1, wherein at least two rolling wheels are rotatably connected to the outer sides of the lower ends of the left support column and the right support column, and the rolling wheels are arranged along the length direction of the frame body.
4. The lapping trolley for conveyors and scraper conveyors as claimed in claim 1 or 3, wherein each rolling wheel is mounted on the lower end of the left support column or the right support column through a rotating shaft.
5. The overlap trolley for conveyors and scraper conveyors of claim 1 wherein the steering mechanism comprises a control system and two hydraulic rams;
the two hydraulic oil cylinders are positioned on two sides of the frame body in the width direction, one end of each hydraulic oil cylinder is fixedly connected with the frame body, and the other end of each hydraulic oil cylinder is rotatably connected with the travelling mechanism;
the control system drives one of the hydraulic oil cylinders to extend, and simultaneously drives the other hydraulic oil cylinder to retract.
6. The lapping trolley for conveyors and scraper conveyors of claim 5, wherein the travelling mechanism further comprises a turntable rotatably mounted below the frame body, the left support column and the right support column are fixedly mounted below the turntable, and the steering mechanism is connected with the turntable and the frame body and used for driving the frame body to steer left and right.
7. The lapping trolley for a conveyor and a scraper conveyor as claimed in claim 6, wherein the rotary table is rotatably connected with the frame body through a pin shaft, the pin shaft is vertically arranged, and the rotary table is driven by the steering mechanism to rotate in a horizontal direction by taking the pin shaft as an axis.
8. The lapping trolley of claim 7 wherein each of the hydraulic rams is pivotally connected at a fixed end to the turntable and at a telescopic end to the frame body.
9. The lapping trolley for conveyors and scraper conveyors of claim 8, wherein the frame body extends downwardly to form a cylinder mounting portion, the hydraulic cylinder is horizontally disposed, the fixed end is connected to the turntable, and the telescopic end is connected to the cylinder mounting portion.
10. The lapping trolley for a conveyor and a scraper conveyor as claimed in any one of claims 5 to 9, wherein the control system comprises an oil tank, a reversing valve and a hydraulic pump, the two hydraulic cylinders are respectively a left hydraulic cylinder and a right hydraulic cylinder;
the hydraulic pump is communicated with an oil inlet of the reversing valve, and the oil tank is communicated with an oil return port of the reversing valve;
a first working oil port of the reversing valve is communicated with an oil inlet of the left hydraulic oil cylinder and an oil outlet of the right hydraulic oil cylinder; and a second working oil port of the reversing valve is communicated with an oil outlet of the left hydraulic oil cylinder and an oil inlet of the right hydraulic oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020241524.0U CN211812116U (en) | 2020-03-02 | 2020-03-02 | Lapping trolley for conveyor and scraper conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020241524.0U CN211812116U (en) | 2020-03-02 | 2020-03-02 | Lapping trolley for conveyor and scraper conveyor |
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| Publication Number | Publication Date |
|---|---|
| CN211812116U true CN211812116U (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020241524.0U Active CN211812116U (en) | 2020-03-02 | 2020-03-02 | Lapping trolley for conveyor and scraper conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211812116U (en) |
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2020
- 2020-03-02 CN CN202020241524.0U patent/CN211812116U/en active Active
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