CN219976156U - Vacuum feed liquid conveying device - Google Patents
Vacuum feed liquid conveying device Download PDFInfo
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- CN219976156U CN219976156U CN202320603354.XU CN202320603354U CN219976156U CN 219976156 U CN219976156 U CN 219976156U CN 202320603354 U CN202320603354 U CN 202320603354U CN 219976156 U CN219976156 U CN 219976156U
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- 239000007788 liquid Substances 0.000 title claims abstract description 161
- 238000007789 sealing Methods 0.000 claims description 32
- 238000007599 discharging Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of feed liquid conveying devices, and discloses a vacuum feed liquid conveying device which comprises a vacuum generator, a feed liquid quantitative conveyor, a feed tank, a feed pipe, a discharge pipe and a receiving tank, wherein the vacuum generator is arranged at the top of the feed liquid quantitative conveyor, the bottom of the feed liquid quantitative conveyor is provided with the feed inlet and the discharge outlet, the upper end of the feed pipe is connected with the feed inlet, the lower end of the feed pipe is connected to the feed tank, the feed tank is internally provided with feed liquid to be conveyed, the upper end of the discharge pipe is connected with the discharge outlet, the lower end of the discharge pipe is connected to the receiving tank, the receiving tank is used for receiving the conveyed feed liquid, the feed pipe comprises one or more groups of split bent pipe components, the split bent pipe components consist of two split bent pipes, the split bent pipes are J-shaped pipes, and the two split bent pipes are identical in structure and are in staggered connection left and right. When the device works stably, the material liquid can be accelerated to flow upwards in a converging way; when the vacuum degree fluctuates downwards, the buffer function is prevented, so that the feed liquid quantitative conveyor is stably conveyed.
Description
Technical Field
The utility model belongs to the technical field of feed liquid conveying devices, and particularly relates to a vacuum feed liquid conveying device.
Background
In recent years, the state is more and more important to environmental protection, for some poisonous and high-radioactivity liquid treatment, the selection of the non-active maintenance-free conveying equipment is the most energy-saving and environmental protection technology at present, the non-active maintenance-free conveying equipment adopts a vacuum liquid conveying device to convey liquid, firstly, a vacuum generator (a pressure air ejector) vacuumizes the interior of the conveyor, negative pressure is generated in the conveyor, liquid is sucked into the conveyor from a feed tank, and when the liquid level in the conveyor exceeds the height of a weir mouth short pipe, the liquid automatically flows into a receiving tank by gravity through a discharge pipe, so that the liquid conveying is realized.
The vacuum feed liquid conveying device is widely applied to various fields such as nuclear power, chemical industry, environmental sanitation, medicine, grain and oil food processing, food packaging, industrial automation and the like, and is a relatively advanced conveying system. However, the current blowing type vacuum conveying system has the defects of poor quantitative conveying stability and slow response time due to large vacuum fluctuation caused by large air compressibility.
Disclosure of Invention
The utility model aims to provide a vacuum feed liquid conveying device so as to solve the technical problems.
In order to achieve the above purpose, the specific technical scheme of the vacuum feed liquid conveying device of the utility model is as follows:
the utility model provides a vacuum feed liquid conveyor, includes vacuum generator, feed liquid ration conveyer, feed tank, inlet pipe, discharging pipe and receiving tank, vacuum generator sets up at feed liquid ration conveyer top for carry out the evacuation in the feed liquid ration conveyer, feed liquid ration conveyer bottom has feed inlet and discharge gate, the inlet pipe upper end is connected with the feed inlet, the inlet pipe lower extreme is connected to the feed tank, have the feed liquid of waiting to carry in the feed tank, the discharge pipe upper end is connected with the discharge gate, the discharge pipe lower extreme is connected to the receiving tank, the receiving tank is used for receiving the feed liquid of carrying, the feed pipe includes a set of or multiunit reposition of redundant personnel return bend subassembly, a set of reposition of redundant personnel return bend subassembly comprises two reposition of redundant personnel return bends, the reposition of redundant personnel return bend is the J pipe, and two reposition of redundant personnel return bends are structurally the same, control opposite staggered connection.
Further, the inlet pipe includes inlet pipe, lower inlet pipe and two sets of branch flow return bend subassemblies, and two sets of branch flow return bend subassemblies are first reposition of redundant personnel return bend subassemblies and second branch flow return bend subassemblies respectively, the inlet pipe is connected with first reposition of redundant personnel return bend subassembly, and first reposition of redundant personnel return bend subassembly is connected with second branch flow return bend subassembly, and second branch flow return bend subassembly is connected with lower inlet pipe, lower inlet pipe is connected with the feed tank, each part subassembly all communicates with each other in the inlet pipe.
Further, the first diverter elbow assembly comprises a first upper diverter elbow and a first lower diverter elbow, the second diverter elbow assembly comprises a second upper diverter elbow and a second lower diverter elbow, the upper feeding pipe is connected with the first upper diverter elbow, the first lower diverter elbow, the second upper diverter elbow and the second lower diverter elbow are connected in a left-right staggered mode, and the second lower diverter elbow is connected with the lower feeding pipe.
Furthermore, the top and the bottom of the split elbow are respectively provided with a first connecting port and a third connecting port, and a second connecting port is arranged in the middle of the split elbow.
Further, the upper end of the upper feeding pipe is connected with the feeding hole of the feed liquid quantitative conveyor, the lower end of the upper feeding pipe is connected with the first connecting hole of the first upper diverting elbow, the second connecting hole of the first upper diverting elbow is connected with the first connecting hole of the first lower diverting elbow, the third connecting hole of the first lower diverting elbow is connected with the first connecting hole of the second upper diverting elbow, the third connecting hole of the first lower diverting elbow is connected with the second connecting hole of the second lower diverting elbow, the third connecting hole of the second upper diverting elbow is connected with the second connecting hole of the second lower diverting elbow 45, the second connecting hole of the second lower diverting elbow is connected with the second 72, the upper end of the lower feeding pipe is connected with the middle part of the lower feeding pipe, and the lower end of the lower feeding pipe is connected into the feeding groove.
Furthermore, the bottom of the discharging pipe is provided with a liquid sealing valve, and the liquid sealing valve is sealed in a one-way mode to prevent air from entering the discharging pipe.
Further, the lower end of the discharging pipe is bent upwards, the outlet is upwards, and the liquid seal valve 8 is connected above the outlet of the discharging pipe.
Further, the liquid seal valve comprises a liquid seal valve seat, a sealing steel ball and a liquid seal valve sleeve, wherein the sealing valve seat is connected with an outlet of the discharging pipe, the sealing steel ball is placed in the liquid seal valve seat, the liquid seal valve sleeve is covered on the liquid seal valve seat, the diameter of the sealing steel ball is larger than that of a water outlet of the liquid seal valve seat, when no liquid exists in the receiving groove, the sealing steel ball seals the liquid seal valve seat under the combined action of gravity and vacuum pressure, when the liquid of the discharging pipe flows out, the sealing steel ball is propped open, and the liquid flows out from an outlet at the upper end of the liquid seal valve sleeve.
Furthermore, the upper end of the feed inlet extends into the feed liquid quantitative conveyor, and the pipe orifice is higher than 1/2-3/4 of the height of the feed liquid quantitative conveyor.
Furthermore, the upper end of the discharge hole extends into the feed liquid quantitative conveyor, and the pipe orifice is lower than 1/10-1/20 of the height of the feed liquid quantitative conveyor.
The vacuum feed liquid conveying device has the following advantages: the utility model designs the split-flow elbow assembly on the feed pipe of the vacuum feed liquid conveying device, when the vacuum feed liquid conveying device stably works, the liquid at the feed inlet 21 is under the action of the split-flow elbow assembly, the lower split-flow elbow accelerates the feed liquid flow of the upper split-flow elbow, and accelerates the feed liquid to flow upwards in a converging way; when the vacuum degree of the vacuum material liquid conveying device fluctuates downwards, the upper split bent pipe prevents the material liquid of the lower split bent pipe from flowing under the action of the split bent pipe assembly, so that the buffer function is prevented, and the material liquid quantitative conveyor 2 is stably conveyed. Meanwhile, the liquid sealing valve 8 is additionally arranged at the bottom of the discharging pipe 5, so that the vacuum degree in the feed liquid quantitative conveyor 2 is ensured, and the stable conveying of feed liquid is further ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a vacuum feed liquid conveying device according to the present utility model;
FIG. 2 is a schematic view of a diverter bend according to the present utility model;
FIG. 3 is a schematic view of accelerating the flow of liquid through the diverter elbow assembly during steady operation of the vacuum feed liquid delivery apparatus;
FIG. 4 is a schematic diagram of the flow direction of the liquid in the flow dividing and bending pipe assembly when the vacuum degree of the vacuum liquid conveying device fluctuates;
FIG. 5 is a schematic diagram of a liquid seal valve structure of a vacuum liquid conveying device;
the figure indicates: 1. a vacuum generator; 2. a feed liquid quantitative conveyor; 21. a feed inlet; 22. a discharge port; 3. a feed tank; 4. a feed pipe; 41. feeding a pipe; 42. a first upper diverter bend; 43. a first lower diverter bend; 44. a second upper diverter bend; 45. a second lower diverter bend; 46. a lower feed pipe; 5. a discharge pipe; 6. a receiving groove; 7. a diverter elbow assembly; 71. a first connecting port; 72. a second connecting port; 73. a third connecting port; 8. a liquid seal valve; 81. a liquid seal valve seat; 82. sealing the steel balls; 83. a liquid seal valve sleeve.
Detailed Description
For a better understanding of the objects, structures and functions of the present utility model, a vacuum feed liquid transporting apparatus according to the present utility model will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a vacuum feed liquid conveying device of the present utility model comprises a vacuum generator 1, a feed liquid quantitative conveyor 2, a feed tank 3, a feed pipe 4, a discharge pipe 5 and a receiving tank 6.
The vacuum generator 1 is arranged at the top of the feed liquid quantitative conveyor 2 and is used for vacuumizing the feed liquid quantitative conveyor 2, a feed inlet 21 and a discharge outlet 22 are formed in the bottom of the feed liquid quantitative conveyor 2, the upper end of the feed pipe 4 is connected with the feed inlet 21, the lower end of the feed pipe 4 is connected to the feed tank 3, and feed liquid to be conveyed is arranged in the feed tank 3. The upper end of the discharging pipe 5 is connected with the discharging hole 22, the lower end of the discharging pipe 5 is connected to the receiving tank 6, and the receiving tank 6 is used for receiving the conveyed feed liquid. The upper end of the feed inlet 21 extends into the feed liquid quantitative conveyor 2, and the pipe opening is higher than 1/2-3/4 of the height of the feed liquid quantitative conveyor 2 so as to ensure that enough liquid can be pumped in. The upper end of the discharge hole 22 stretches into the feed liquid quantitative conveyor 2, and the pipe orifice is lower than 1/10-1/20 of the height of the feed liquid quantitative conveyor 2, so that the liquid in the feed liquid quantitative conveyor 2 can be conveyed to the receiving tank 6, and the residue at the bottom of the feed liquid quantitative conveyor 2 is reduced.
When the device is used, the vacuum generator 1 is vacuumized, negative pressure is generated in the feed liquid quantitative conveyor 2, feed liquid is sucked into the feed liquid quantitative conveyor 2 along the feed pipe 4 from the feed tank 3, and when the liquid level in the feed liquid quantitative conveyor 2 exceeds the height of the pipe orifice of the discharge pipe 5, the feed liquid automatically flows into the receiving tank 6 through the discharge pipe 5 under the action of gravity.
Because the vacuum compressibility of the vacuum feed liquid conveying device is larger, or the air compressibility is changed along with the change of the height of liquid in the feed liquid quantitative conveyor 2, the fluctuation of vacuum degree is large, the feed liquid conveying stability is poor, and the corresponding time is slow, the utility model improves the feed pipe 4. On the feed pipe 4 is provided one or more sets of diverter elbow assemblies 7. The group of branch flow bent pipe assemblies 7 are composed of 2 branch flow bent pipes, namely an upper branch flow bent pipe and a lower branch flow bent pipe, and the upper branch flow bent pipe and the lower branch flow bent pipe are identical in structure and are connected in a staggered manner in a left-right opposite manner during installation. As shown in fig. 2, the split elbow is a J-shaped pipe, the top and the bottom are respectively provided with a first connection port 71 and a third connection port 73, and the middle is provided with a second connection port 72. Preferably, the utility model provides a two-component flow elbow assembly 7: a first diverter elbow assembly comprising a first upper diverter elbow 42 and a first lower diverter elbow 43, and a second diverter elbow assembly comprising a second upper diverter elbow 44 and a second lower diverter elbow 45. As shown in fig. 3, the feeding pipe 4 comprises an upper feeding pipe 41, a first upper split-flow elbow 42, a first lower split-flow elbow 43, a second upper split-flow elbow 44, a second lower split-flow elbow 45 and a lower feeding pipe 46 which are sequentially connected from top to bottom, and all parts of components in the feeding pipe 4 are communicated. Specifically, the upper end of the upper feeding pipe 41 is connected to the feed inlet 21 of the feed liquid quantitative conveyor 2, the lower end of the upper feeding pipe is connected to the first connection port 71 of the first upper diverter elbow 42, the second connection port 72 of the first upper diverter elbow 42 is connected to the first connection port 71 of the first lower diverter elbow 43, the third connection port 73 of the first lower diverter elbow 43 is connected to the first connection port 71 of the second upper diverter elbow 44, the third connection port 73 of the first lower diverter elbow 43 is connected to the second connection port 72 of the second upper diverter elbow 44, the second connection port 72 of the second upper diverter elbow 44 is connected to the second connection port 72 of the second lower diverter elbow 45, the second connection port 72 of the second lower diverter elbow 45 is connected to the upper end of the lower feeding pipe 46, the third connection port 73 of the second lower diverter elbow 45 is connected to the middle part of the lower feeding pipe 46, and the lower end of the lower feeding pipe 46 is connected to the feeding trough 3. According to the utility model, more than two groups of two-component flow bent pipe assemblies 7 can be arranged according to the requirement, and the two groups of two-component flow bent pipe assemblies are sequentially connected according to the connecting mode.
When the fluid passes through the split-flow elbow assembly in the forward direction, the fluid can be split into two paths at each loop port, and then the two paths of fluid can be converged at the next junction port, and acceleration is realized. Otherwise, if the fluid reversely flows into the split-flow elbow assembly, the fluid can be divided into two paths at the first intersection and is converged again at the second intersection, except that the flowing directions of the two paths of fluid are opposite at this time, so that great resistance is formed, and therefore, the split-flow elbow assembly can only pass forward and is difficult to reversely flow. As shown in fig. 3, when the vacuum feed liquid conveying device stably works, the liquid at the feed inlet 21 flows under the action of the split-flow bent pipe assembly, the lower split-flow bent pipe accelerates the flow of the feed liquid of the upper split-flow bent pipe, and accelerates the flow of the feed liquid in a converging way; as shown in fig. 4, when the vacuum degree of the vacuum feed liquid conveying device fluctuates downwards, the upper split elbow pipe prevents the feed liquid of the lower split elbow pipe from flowing under the action of the split elbow pipe assembly, so that the buffer preventing effect is achieved, and the feed liquid quantitative conveyor 2 is conveyed stably.
Further, when no liquid is present in the receiving tank 6, if the discharge port 22 is not provided with a one-way sealing device or the sealing device is opened under vacuum pressure, the interior of the feed liquid quantitative conveyor 2 is not vacuumed and cannot work normally, and in order to avoid the problem, as shown in fig. 5, the bottom of the discharge pipe 5 is additionally provided with a liquid sealing valve 8, so that the one-way sealing of the tail of the discharge pipe 5 is realized, the vacuum degree in the feed liquid quantitative conveyor 2 is ensured, and the stable conveying of the feed liquid is further ensured.
Specifically, the lower end of the discharging pipe 5 is bent upwards, the outlet is upwards, the liquid seal valve 8 is connected above the outlet of the discharging pipe 5, the liquid seal valve 8 comprises a liquid seal valve seat 81, a seal steel ball 82 and a liquid seal valve sleeve 83, the seal steel ball 81 is connected with the outlet of the discharging pipe 5, the seal steel ball 82 is placed in the liquid seal valve seat 81, the liquid seal valve sleeve 83 covers the liquid seal valve seat 81, the diameter of the seal steel ball 82 is larger than the water outlet of the liquid seal valve seat 81, when no liquid exists in the receiving tank 6, the seal steel ball 82 seals the liquid seal valve seat 81 under the combined action of gravity and vacuum pressure, when the liquid of the discharging pipe 5 flows out, the seal steel ball 82 is propped open, and the liquid flows out from the outlet at the upper end of the liquid seal valve sleeve 83.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a vacuum feed liquid conveyor, includes vacuum generator (1), feed liquid ration conveyer (2), feed tank (3), inlet pipe (4), discharging pipe (5) and receiving tank (6), vacuum generator (1) set up at feed liquid ration conveyer (2) top for carry out the evacuation in feed liquid ration conveyer (2), feed liquid ration conveyer (2) bottom has feed inlet (21) and discharge gate (22), feed pipe (4) upper end is connected with feed inlet (21), feed pipe (4) lower extreme is connected to feed tank (3), feed liquid to be carried has in feed tank (3), discharging pipe (5) upper end is connected with discharge gate (22), discharging pipe (5) lower extreme is connected to receiving tank (6), receiving tank (6) are used for receiving the feed liquid of carrying, a set of or multiunit reposition of redundant personnel return bend subassembly (7) are by two reposition of redundant personnel return bend pipe J, two reposition of redundant personnel return bend pipe structures are the same, and the left side is crisscross for the return bend, and the return bend is the same.
2. The vacuum feed liquid conveying device according to claim 1, wherein the feed pipe (4) comprises an upper feed pipe (41), a lower feed pipe (46) and two sets of branch pipe bent pipe assemblies (7), the two sets of branch pipe bent pipe assemblies (7) are respectively a first branch pipe bent pipe assembly and a second branch pipe bent pipe assembly, the upper feed pipe (41) is connected with the first branch pipe bent pipe assembly, the first branch pipe bent pipe assembly is connected with the second branch pipe bent assembly, the second branch pipe bent pipe assembly is connected with the lower feed pipe (46), the lower feed pipe (46) is connected with the feed tank (3), and all the parts of the assemblies in the feed pipe (4) are communicated.
3. The vacuum feed liquid conveying device according to claim 2, wherein the first diverter elbow assembly comprises a first upper diverter elbow (42) and a first lower diverter elbow (43), the second diverter elbow assembly comprises a second upper diverter elbow (44) and a second lower diverter elbow (45), the upper feed pipe (41) is connected with the first upper diverter elbow (42), the first lower diverter elbow (43), the second upper diverter elbow (44) and the second lower diverter elbow (45) are connected in a left-right staggered manner, and the second lower diverter elbow (45) is connected with the lower feed pipe (46).
4. A vacuum feed liquid transporting apparatus as claimed in claim 3, wherein the top and bottom of said split bend have a first connection port (71), a third connection port (73), and a second connection port (72) in the middle.
5. The vacuum feed liquid conveying device according to claim 4, wherein the upper end of the upper feed pipe (41) is connected with the feed inlet (21) of the feed liquid quantitative conveyor (2), the lower end is connected with the first connecting port (71) of the first upper shunt elbow (42), the second connecting port (72) of the first upper shunt elbow (42) is connected with the first connecting port (71) of the first lower shunt elbow (43), the third connecting port (73) of the first upper shunt elbow (42) is connected with the second connecting port (72) of the first lower shunt elbow (43), the second connecting port (72) of the first lower shunt elbow (43) is connected with the first connecting port (71) of the second upper shunt elbow (44), the second connecting port (72) of the second upper shunt elbow (44) is connected with the first connecting port (71) of the second lower shunt elbow (45), the third connecting port (73) of the second upper shunt elbow (44) is connected with the second connecting port (72) of the second lower shunt elbow (45), the third connecting port (72) of the second lower shunt elbow (45) is connected with the third connecting port (46) of the second upper shunt elbow (44), the lower end of the lower feed pipe (46) is connected into the feed groove (3).
6. The vacuum feed liquid conveying device according to claim 1, characterized in that the bottom of the discharge pipe (5) is provided with a liquid sealing valve (8), and the liquid sealing valve (8) is sealed in a one-way to prevent air from entering the discharge pipe (5).
7. The vacuum feed liquid conveying device according to claim 6, wherein the lower end of the discharge pipe (5) is bent upwards, the outlet is upwards, and the liquid sealing valve (8) is connected above the outlet of the discharge pipe (5).
8. The vacuum feed liquid conveying device according to claim 7, wherein the liquid sealing valve (8) comprises a liquid sealing valve seat (81), a sealing steel ball (82) and a liquid sealing valve sleeve (83), the sealing valve seat (81) is connected with an outlet of the discharging pipe (5), the sealing steel ball (82) is placed in the liquid sealing valve seat (81), the liquid sealing valve sleeve (83) covers the liquid sealing valve seat (81), the diameter of the sealing steel ball (82) is larger than that of a water outlet of the liquid sealing valve seat (81), when no liquid exists in the receiving groove (6), the sealing steel ball (82) seals the liquid sealing valve seat (81) under the combined action of gravity and vacuum pressure, and when the liquid of the discharging pipe (5) flows out, the sealing steel ball (82) is propped open, and the liquid flows out of the outlet at the upper end of the liquid sealing valve sleeve (83).
9. The vacuum feed liquid conveying device according to claim 1, wherein the upper end of the feed inlet (21) extends into the feed liquid quantitative conveyor (2), and the pipe orifice is higher than 1/2-3/4 of the height of the feed liquid quantitative conveyor (2).
10. The vacuum feed liquid conveying device according to claim 1, wherein the upper end of the discharge hole (22) extends into the feed liquid quantitative conveyor (2), and the pipe orifice is lower than 1/10-1/20 of the height of the feed liquid quantitative conveyor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320603354.XU CN219976156U (en) | 2023-03-24 | 2023-03-24 | Vacuum feed liquid conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320603354.XU CN219976156U (en) | 2023-03-24 | 2023-03-24 | Vacuum feed liquid conveying device |
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| Publication Number | Publication Date |
|---|---|
| CN219976156U true CN219976156U (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320603354.XU Active CN219976156U (en) | 2023-03-24 | 2023-03-24 | Vacuum feed liquid conveying device |
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| Country | Link |
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| CN (1) | CN219976156U (en) |
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- 2023-03-24 CN CN202320603354.XU patent/CN219976156U/en active Active
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