CN220248507U - Special hydraulic pump station of fixed hydraulic breaker - Google Patents
Special hydraulic pump station of fixed hydraulic breaker Download PDFInfo
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- CN220248507U CN220248507U CN202321434362.2U CN202321434362U CN220248507U CN 220248507 U CN220248507 U CN 220248507U CN 202321434362 U CN202321434362 U CN 202321434362U CN 220248507 U CN220248507 U CN 220248507U
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- 230000007704 transition Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 177
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model discloses a special hydraulic pump station for a fixed hydraulic crusher, belonging to the technical field of hydraulic stations; the oil tank comprises a frame, wherein the lower part of the frame comprises an oil tank body and a transmission area respectively, the bottom of the oil tank body is provided with an oil suction port, the top of the oil tank body is provided with an oil return port, and an oil suction pipeline is arranged outside the oil suction port; a driving motor and an air-cooled radiator which are vertically arranged are arranged on a frame, an oil inlet I and an oil drain I are arranged on the air-cooled radiator, a plunger pump is arranged at the bottom of an output shaft penetrating through a transmission area of the driving motor, an oil inlet II and an oil drain II are arranged on the plunger pump, an oil return pipeline I is arranged on the oil drain II, the other end of the oil return pipeline I extends and is arranged on a main machine multi-way valve of the hydraulic crusher, the oil inlet I of the air-cooled radiator is communicated with an oil return filter of the hydraulic crusher, a transition pipe is arranged at the oil drain I, and the other end of the transition pipe is connected with the oil return opening. The utility model realizes the small and compact whole volume to realize the replacement of the existing hydraulic station.
Description
Technical Field
The utility model belongs to the technical field of hydraulic stations, and particularly relates to a special hydraulic pump station for a fixed hydraulic crusher.
Background
The hydraulic station is a hydraulic source device including a hydraulic pump, a driving motor, an oil tank, a directional valve, a throttle valve, a relief valve, and the like, or a hydraulic device including a control valve. The hydraulic station is connected with the driving device (oil cylinder or motor) by an oil pipe, and the hydraulic system can realize various specified actions.
The valve bodies such as the direction valve, the throttle valve, the overflow valve and the like do not need to appear in the existing hydraulic station, a plurality of groups of valve bodies can be arranged on a driving device, the driving device can be an excavator, a wood clamping machine, a pipe holding machine, a fixed hydraulic crusher and the like, the driving device needs to be debugged before being arranged, the hydraulic station is required to supply oil to the driving device, oil way detection of the driving device is carried out, the oil temperature of the driving device can be quickly increased when the oil way is detected, and the detection is influenced.
Fig. 1 is a schematic diagram of a conventional hydraulic station, which is common in the prior art and includes a motor for driving a pump station to perform oil-way operation, and a cooling device for cooling, but has the following problems:
1. the whole volume is overlarge, on one hand, the motor needs to be stably installed on the motor fixing seat when the motor is horizontal, and on the other hand, the oil way pipeline is overlong, so that the equipment expenditure is larger;
2. the volume of the oil tank is overlarge, and the circulation rate is at the bottom;
3. the height of the oil suction port is higher because the motor is horizontal;
4. the filter equipment and the heating equipment are insufficient;
the present utility model has been made in view of this.
Disclosure of Invention
In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:
the special hydraulic pump station for the fixed hydraulic crusher comprises a frame, wherein the lower part of the frame respectively comprises an oil tank body and a transmission area, the bottom of the oil tank body is provided with an oil suction port, the top of the oil tank body is provided with an oil return port, an oil suction pipeline is arranged outside the oil suction port, and the oil suction pipeline is a hydraulic fabric rubber pipe; a driving motor and an air-cooled radiator which are vertically arranged are arranged on the frame, an oil inlet I and an oil drain I are arranged on the air-cooled radiator, a plunger pump is arranged at the bottom of an output shaft penetrating through a transmission area of the driving motor, an oil inlet II and an oil drain II are arranged on the plunger pump, an oil return pipeline I is arranged on the oil drain II, the other end of the oil return pipeline I extends and is connected with a main machine multi-way valve of the hydraulic crusher, and the oil inlet I of the air-cooled radiator is communicated with an oil return filter of the hydraulic crusher to realize hydraulic circulation of the external hydraulic crusher; the air-cooled radiator can also have the oil return of an oil port to return oil through the outside intercommunication host computer multiway valve, draws in this application.
A transition pipe is arranged at one position of the oil drain port, and the other end of the transition pipe is connected with the oil return port. The driving motor and the plunger pump are connected and driven through a coupler, and the air-cooled radiator is used for carrying out blowing, heat dissipation and cooling on return oil of the fixed hydraulic crusher and then returns to the oil tank body through the return oil filter;
according to the utility model, the structure is compact by arranging the driving motor in the vertical direction, and the frame with smaller volume and the oil tank with smaller volume can be realized to realize the rotation of the quick oil; secondly, by arranging a plurality of groups of corresponding filtering devices, the external interference of oil is reduced, and the hydraulic pipeline of the driving device is prevented from being influenced; and secondly, by arranging the heating pipe, the problem of low oil flow rate of the hydraulic station can be solved, and the actual use is not influenced. The hydraulic pump station is mainly used for providing a power source for the fixed hydraulic crusher, has smaller and more compact volume than the former hydraulic pump station and is convenient to maintain.
In a further technical scheme, the YKJD-24 liquid level relay is arranged on the oil tank body, the YKJD-24 liquid level relay is suitable for detecting the liquid level of oil in the oil tank body, the top of the YKJD-24 liquid level relay extends to the oil tank body and is provided with a liquid level flange, and the liquid level flange is detachably connected with the frame.
In still further technical scheme, wash the hole and install the washing apron has been seted up to one side of oil tank box, the washing apron can be dismantled with the frame and be connected, the bottom of oil tank box still is provided with the oil drain port, oil drain port department is provided with joint G1.
In a further technical scheme, a pump oil suction flange is arranged on the second oil inlet of the plunger pump, the pump oil suction flange is detachably connected with the plunger pump, and the pump oil suction flange is fixed on an oil suction pipeline; the oil suction pipeline is communicated with the oil inlet.
The mounting hole has been seted up in the frame, install the pump cover on the pump body of plunger pump, the pump cover extends to on the mounting hole, mounting flange dish is installed outward to driving motor's output, mounting flange dish and pump cover detachable connection and be located the top of mounting hole.
In a further technical scheme, the oil suction port is provided with an oil suction filter, an outlet is arranged on the oil suction filter, an oil suction external flange is arranged on the oil suction filter, and the oil suction external flange is detachably connected with the oil suction filter and is sleeved on an oil suction pipeline. The plunger pump is connected with the oil suction filter through a hydraulic fabric rubber tube, and hydraulic oil is discharged from an oil inlet I of the plunger pump to be supplied to the crusher through an oil discharge port II of the plunger pump after being pumped into the body by the plunger pump through the oil suction filter and the hydraulic fabric rubber tube.
In a further technical scheme, an RFA oil return filter is arranged on the oil return port, an oil return flange is arranged at the top of the RFA oil return filter and is connected with the frame, and the top of the RFA oil return filter is communicated with the transition pipe.
In a further technical scheme, an air filter is further arranged on the rack, and the bottom of the air filter extends into the oil tank body; the air filter is used for enabling the oil tank body 2 to be communicated with the external atmospheric pressure, so that the air pressure in the oil tank body is balanced with the external atmospheric pressure;
the air filter is characterized in that an air filtering flange is arranged at the outer end of the top of the air filter, and a bolt is arranged on the air filtering flange and is detachably connected with the frame.
In a further technical scheme, an SRY2 tubular heating pipe is arranged on the tank body of the oil tank positioned on the same side of the oil suction port, and a heater flange is arranged outside the SRY2 tubular heating pipe and connected with the frame.
In a further technical scheme, the first oil inlet and the first oil drain outlet are positioned on the same side of the air-cooled radiator;
the oil inlet II and the oil drain outlet are positioned at two opposite sides of the plunger pump;
the frame is provided with a pressure gauge and is communicated with the oil tank body;
the lifting lugs are arranged outside the frame and are arranged on two groups and are respectively positioned on the same side with the oil drain port and the oil suction port.
In a further technical scheme, a liquid level meter is arranged on the tank body of the oil tank positioned on the same side of the oil drain port, and the liquid level meter is connected with the inside of the tank body of the oil tank;
the bottom of the frame is provided with a groove steel plate, and the channel steel plate is fixedly connected with the frame.
The beneficial effects are that:
according to the utility model, the structure is compact by arranging the driving motor in the vertical direction, and the frame with smaller volume and the oil tank with smaller volume can be realized to realize the rotation of the quick oil; secondly, by arranging a plurality of groups of corresponding filtering devices, the external interference of oil is reduced, and the hydraulic pipeline of the driving device is prevented from being influenced; and secondly, by arranging the heating pipe, the problem of low oil flow rate of the hydraulic station can be solved, and the actual use is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
In the drawings:
FIG. 1 is a block diagram of a hydraulic station of the prior art;
FIG. 2 is a schematic perspective view of the present utility model;
FIG. 3 is a schematic perspective view of the present utility model (inside the tank body);
FIG. 4 is a schematic view of a frame structure of the present utility model;
FIG. 5 is a rear view of the frame structure of the present utility model;
FIG. 6 is a rear view of the hydraulic station configuration of the present utility model (return line one not shown);
FIG. 7 is a rear elevational view of the hydraulic station configuration of the present utility model;
FIG. 8 is a view of a connecting structure of a driving motor and a plunger pump according to the present utility model;
fig. 9 is a rear view of the connection of the drive motor and plunger pump of the present utility model.
In the figure: 1. a frame; 2. an oil tank body; 21. an oil suction port; 22. an oil return port; 23. an oil drain port; 3. a transmission region; 4. an oil suction pipeline; 41. a pumping oil flange; 5. a driving motor; 51. a fixed flange;
6. an air-cooled radiator; 61. an oil inlet I; 62. an oil drain port I; 7. a plunger pump; 71. an oil inlet II; 72. an oil drain port II; 8. an oil return pipeline I; 9. an oil return pipeline II; 10. YKJD-24 liquid level relay; 101. a liquid level flange; 11. cleaning the cover plate; 12. a pump sleeve; 13. an oil absorption filter; 131. an oil absorption external flange; 14. an RFA oil return filter; 141. an oil return flange; 15. an air cleaner; 151. an air filtering flange; 16. SRY2 tubular heating tube; 161. a heater flange; 17. a pressure gauge; 18. lifting lugs; 19. a liquid level gauge; 20. a trough steel plate; 30. a transition pipe.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The principles of the utility model will be further described with reference to the drawings and specific examples.
Fig. 1 is a hydraulic station of the prior art, which is relatively large in submission and requires a motor placed in a lying manner, resulting in a relatively high overall cost.
Examples
As shown in fig. 2 to 9, in an embodiment of the present utility model, a hydraulic pump station dedicated for a fixed hydraulic crusher includes a frame 1, wherein the lower part of the frame 1 includes an oil tank body 2 and a transmission area 3, an oil suction port 21 is provided at the bottom of the oil tank body 2, an oil return port 22 is provided at the top of the oil tank body, and an oil suction pipe 4 is installed outside the oil suction port 21;
the machine frame 1 is provided with a driving motor 5 and an air-cooled radiator 6 which are vertically arranged, the air-cooled radiator 6 is provided with an oil inlet I61 and an oil drain I62, and the oil inlet I61 and the oil drain I62 are positioned on the same side of the air-cooled radiator 6; the output shaft of the driving motor 5 penetrates through the bottom of the transmission area 3, a plunger pump 7 is installed, an oil inlet II 71 and an oil drain outlet II 72 are arranged on the plunger pump 7, and the oil inlet II 71 and the oil drain outlet II 72 are located on two opposite sides of the plunger pump 7. An oil return pipeline I8 is arranged on the oil drain port II 72, and the other end of the oil return pipeline I8 extends and is communicated with a main machine multi-way valve of the hydraulic breaker;
an oil return pipeline II 30 is arranged at an oil inlet I61 of the air cooling radiator 6 and is communicated with an oil return filter of the hydraulic crusher, a transition pipe 9 is arranged at an oil discharge port I62, and the other end of the transition pipe 9 is connected with an oil return port 22.
As shown in fig. 3, the oil tank body 2 is provided with a YKJD-24 liquid level relay 10, the YKJD-24 liquid level relay 10 is suitable for detecting the liquid level of oil in the oil tank body 2, the top of the YKJD-24 liquid level relay 10 extends to the oil tank body 2 and is provided with a liquid level flange 101, and the liquid level flange 101 is detachably connected with the frame 1. The YKJD-24 liquid level relay effectively monitors the quantity of hydraulic oil in the oil tank body 2 and sends a signal to the control system when the hydraulic oil exceeds a set oil level, so that the starting and stopping of the motor are controlled;
the cleaning hole is formed in one side of the oil tank body 2, the cleaning cover plate 11 is installed on the oil tank body, the cleaning cover plate is detachably connected with the frame 1, an oil drain port 23 is further formed in the bottom of the oil tank body 2, and a joint G1 is arranged at the oil drain port 23. The oil suction port 21 is provided with an oil suction filter 13, the oil suction filter 13 is provided with an outlet and is provided with an oil suction external flange 131, and the oil suction external flange 131 is detachably connected with the oil suction filter 13 and is sleeved on the oil suction pipeline 4. The SRY2 tubular heating pipe 16 is arranged on the oil tank body 2 positioned on the same side of the oil suction port 21, and a heater flange 161 is arranged outside the SRY2 tubular heating pipe 16 and is connected with the frame 1. The SRY2 tubular heating tube 16 is used to heat the hydraulic oil at low temperatures to bring the hydraulic oil to a suitable operating temperature. The oil suction filter 13 is also provided with a temperature sensor for detecting the temperature of the oil in the oil tank body 2. The temperature sensor effectively monitors the temperature of the hydraulic oil in the oil tank body 2 and sends a signal to the control system when the oil temperature exceeds a set value, namely, the oil temperature is too high or too low, so as to control the starting and stopping of the motor and the running and stopping of the SRY2 tubular heating pipe 16;
the frame 1 is also provided with an air filter 15, and the bottom of the air filter 15 extends into the oil tank body 2; an air filtering flange 151 is arranged at the outer end of the top of the air filter 15, and a bolt is detachably connected with the frame 1 on the air filtering flange 151.
A second oil inlet 71 of the plunger pump 7 is provided with a pump oil suction flange 41, the pump oil suction flange 41 is detachably connected with the plunger pump 7, and the pump oil suction flange 41 is fixed on the oil suction pipeline 4; the oil outlet of the plunger pump 7 is also provided with a pressure sensor for monitoring the oil pressure of the system in real time, which is not shown in the figure.
As shown in fig. 7 and 8, the frame 1 is provided with a mounting hole, the pump body of the plunger pump 7 is provided with a pump sleeve 12, the pump sleeve 12 extends to the mounting hole, the output end of the driving motor 5 is externally provided with a fixed flange plate 51, and the fixed flange plate 51 is detachably connected with the pump sleeve 12 and is positioned at the top of the mounting hole.
In a further technical scheme, an RFA oil return filter 14 is arranged on the oil return port 22, an oil return flange 141 is arranged at the top of the RFA oil return filter 14 and is connected with the frame 1, and the top of the RFA oil return filter 14 is communicated with the transition pipe 9. The oil suction filter 13 can effectively control the cleanliness of the hydraulic oil entering the plunger pump 7, and the RFA oil return filter 14 can effectively control the cleanliness of the hydraulic oil entering the oil tank body 2;
the frame 1 is provided with a pressure gauge 17 and is communicated with the oil tank body 2; the pressure gauge 17 displays the system oil pressure after the driving motor 5 is started in real time;
the frame 1 is also provided with lifting lugs 18, and the lifting lugs 18 are provided with two groups and are respectively positioned on the same side as the oil drain port 23 and the oil suction port 21.
The oil tank body 2 positioned on the same side of the oil drain port 23 is provided with a liquid level meter 19, and the liquid level meter 19 and the inside of the oil tank body 2 are internally connected; the bottom of the frame 1 is provided with a channel steel plate 20, the channel steel plate 20 is fixedly connected with the frame 1, and the channel steel plate 20 is suitable for supporting the whole frame 1.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The special hydraulic pump station for the fixed hydraulic crusher is characterized by comprising a frame (1), wherein the lower part of the frame (1) respectively comprises an oil tank body (2) and a transmission area (3), an oil suction port (21) is arranged at the bottom of the oil tank body (2) and an oil return port (22) is arranged at the top of the oil tank body, and an oil suction pipeline (4) is arranged outside the oil suction port (21);
the novel air-cooled radiator is characterized in that a driving motor (5) and an air-cooled radiator (6) which are vertically arranged are arranged on the frame (1), an oil inlet I (61) and an oil drain I (62) are arranged on the air-cooled radiator (6), an output shaft of the driving motor (5) penetrates through the bottom of the transmission area (3) to be provided with a plunger pump (7), an oil inlet II (71) and an oil drain II (72) are arranged on the plunger pump (7), an oil return pipeline I (8) is arranged on the oil drain II (72), an oil return pipeline II (30) is arranged at the oil inlet I (61) of the air-cooled radiator (6), a transition pipe (9) is arranged on the oil drain I (62), and the other end of the transition pipe (9) is connected with an oil return port (22).
2. The hydraulic power unit special for the fixed hydraulic crusher according to claim 1, wherein the oil tank body (2) is provided with a YKJD-24 liquid level relay (10), the YKJD-24 liquid level relay (10) is suitable for detecting the liquid level of oil in the oil tank body (2), the top of the YKJD-24 liquid level relay (10) extends to the oil tank body (2) and is provided with a liquid level flange (101), and the liquid level flange (101) is detachably connected with the frame (1).
3. The hydraulic pump station special for the fixed hydraulic crusher according to claim 1, wherein a cleaning hole is formed in one side of the oil tank body (2) and a cleaning cover plate (11) is installed, the cleaning cover plate is detachably connected with the frame (1), an oil drain port (23) is further formed in the bottom of the oil tank body (2), and a joint G1 is arranged at the oil drain port (23).
4. The hydraulic pump station special for the fixed hydraulic crusher according to claim 1, wherein a pump oil suction flange (41) is installed on a second oil inlet (71) of the plunger pump (7), the pump oil suction flange (41) is detachably connected with the plunger pump (7), and the pump oil suction flange (41) is fixed on an oil suction pipeline (4);
the novel plunger pump is characterized in that a mounting hole is formed in the frame (1), a pump sleeve (12) is mounted on a pump body of the plunger pump (7), the pump sleeve (12) extends to the mounting hole, a fixed flange plate (51) is mounted outside an output end of the driving motor (5), and the fixed flange plate (51) is detachably connected with the pump sleeve (12) and located at the top of the mounting hole.
5. The hydraulic pump station special for the fixed hydraulic crusher according to claim 1, wherein an oil suction filter (13) is installed at the oil suction port (21), an outlet is arranged on the oil suction filter (13) and an oil suction external flange (131) is installed on the oil suction filter, and the oil suction external flange (131) is detachably connected with the oil suction filter (13) and is sleeved on an oil suction pipeline (4).
6. The hydraulic pump station special for the fixed hydraulic crusher according to claim 1, wherein an RFA oil return filter (14) is arranged on the oil return port (22), an oil return flange (141) is arranged at the top of the RFA oil return filter (14) and is connected with the frame (1), and the top of the RFA oil return filter (14) is communicated with the transition pipe (9).
7. The hydraulic pump station special for the fixed hydraulic crusher according to claim 1, wherein an air filter (15) is further arranged on the frame (1), and the bottom of the air filter (15) extends into the oil tank body (2);
an air filtering flange (151) is arranged at the outer end of the top of the air filter (15), and a bolt is arranged on the air filtering flange (151) and is detachably connected with the frame (1).
8. The hydraulic pump station special for the fixed hydraulic crusher according to claim 1, wherein an SRY2 tubular heating pipe (16) is arranged on the oil tank body (2) positioned on the same side of the oil suction port (21), and a heater flange (161) is arranged outside the SRY2 tubular heating pipe (16) and is connected with the frame (1).
9. The hydraulic pump station special for a fixed hydraulic crusher according to claim 1, wherein:
the first oil inlet (61) and the first oil drain (62) are positioned on the same side of the air-cooled radiator (6);
the second oil inlet (71) and the second oil outlet (72) are positioned on two opposite sides of the plunger pump (7);
the frame (1) is provided with a pressure gauge (17) and is communicated with the oil tank body (2);
the lifting lugs (18) are arranged outside the frame (1), and the lifting lugs (18) are provided with two groups and are respectively located on the same side with the oil drain port (23) and the oil suction port (21).
10. The hydraulic pump station special for a fixed hydraulic crusher according to claim 1, wherein:
the oil tank body (2) positioned on the same side of the oil drain port (23) is provided with a liquid level meter (19), and the liquid level meter (19) is communicated with the inside of the oil tank body (2);
the bottom of the frame (1) is provided with a groove steel plate (20), and the channel steel plate (20) is fixedly connected with the frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321434362.2U CN220248507U (en) | 2023-06-07 | 2023-06-07 | Special hydraulic pump station of fixed hydraulic breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321434362.2U CN220248507U (en) | 2023-06-07 | 2023-06-07 | Special hydraulic pump station of fixed hydraulic breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220248507U true CN220248507U (en) | 2023-12-26 |
Family
ID=89264243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321434362.2U Active CN220248507U (en) | 2023-06-07 | 2023-06-07 | Special hydraulic pump station of fixed hydraulic breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220248507U (en) |
-
2023
- 2023-06-07 CN CN202321434362.2U patent/CN220248507U/en active Active
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