CN112871839B - Polishing object transportation cleaning equipment - Google Patents
Polishing object transportation cleaning equipment Download PDFInfo
- Publication number
- CN112871839B CN112871839B CN202110039746.3A CN202110039746A CN112871839B CN 112871839 B CN112871839 B CN 112871839B CN 202110039746 A CN202110039746 A CN 202110039746A CN 112871839 B CN112871839 B CN 112871839B
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- China
- Prior art keywords
- water
- polished
- transportation
- water outlet
- transport block
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- 238000004140 cleaning Methods 0.000 title claims abstract description 21
- 238000005498 polishing Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 236
- 230000000903 blocking effect Effects 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 abstract description 8
- 238000004220 aggregation Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011324 bead Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
Abstract
The invention discloses polishing object transportation cleaning equipment which comprises a transportation pipeline and a water falling tank, wherein the water falling tank is positioned above the transportation pipeline, the caliber of the water falling tank is smaller than that of the transportation pipeline, a plurality of water flowing holes are formed in the bottom of the water falling tank, a water inlet pipe for water inflow is formed in the side wall of the water falling tank, a transportation block to be polished is transported in the transportation pipeline, and a backflow cavity is formed in the side wall of the transportation pipeline. According to the invention, when the speed of the transport block to be polished is greater than the speed of water flowing out of the water flowing hole, the transport block to be polished can push the water flow, so that the water aggregation phenomenon is formed below the transport block to be polished, the aggregated water can play a role in obstructing the descending of the transport block to be polished, otherwise, the speed of the transport block to be polished is less than the speed of water flowing out of the water flowing hole, meanwhile, the water aggregation phenomenon is formed above the transport block to be polished, the water flow can push the transport block to be polished to descend, and the transport block to be polished has a pushing effect.
Description
Technical Field
The invention relates to the technical field of polishing piece cleaning, in particular to polishing article transportation cleaning equipment.
Background
At present, some timber needs to be cleaned in the timber polishing process, burrs on the side surfaces of the timber are removed, and finally the processed timber is transported, so that the complete polished timber can be packaged, but the following problems often exist in the existing equipment:
firstly, the existing processing equipment cannot perform synchronous operation, namely cannot complete the functions of cleaning, deburring and transportation at the same time, and the reason for this is mainly that the general multifunctional equipment often has the problems of overlarge volume and complex structure:
secondly, in the existing carrying process, the object transportation speed is not easy to control, and the reason is mainly that when in transportation, the object is greatly influenced by external force, so that the constant transportation speed is not easy to cause, and the collision phenomenon of the object transportation is very easy to cause.
For this purpose, we have devised a polishing article transport cleaning apparatus.
Disclosure of Invention
The invention aims to solve the problems that the existing processing equipment cannot perform synchronous operation and the object transportation speed is not easy to control, and provides polishing object transportation cleaning equipment.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a polished object transportation cleaning equipment, includes transportation pipeline and water fall tank, water fall tank is located transportation pipeline top, water fall tank bore is less than transportation pipeline bore, water fall tank bottom is provided with a plurality of flow holes, water fall tank lateral wall is provided with the inlet tube that is used for intaking, transportation has the transportation piece of waiting to polish in the transportation pipeline, be provided with the backward flow chamber in the transportation pipeline lateral wall, a plurality of backward flow groups have been set up respectively in the backward flow chamber, a plurality of backward flow groups are including the water inlet system that contains the ball that blocks water that is used for the manger plate and the play water system that contains first slope piston, through backward flow chamber intercommunication between water inlet system and the play water system.
Preferably, the water inlet system comprises a first circular groove, a second circular groove, a round angle, a first buffer spring and a blocking ring, wherein the first circular groove and the second circular groove are coaxially arranged and communicated, the round angle is arranged on the second circular groove on one side opposite to the first circular groove and the second circular groove, the blocking ring is arranged on the inner side wall of the second circular groove, the first buffer spring is arranged between the blocking ring and the water blocking ball, and two ends of the first buffer spring are fixedly connected with the blocking ring and the water blocking ball respectively.
Preferably, the water outlet system comprises an inclined hole, a second buffer spring, an inclined water outlet plug, an inclined pushing tube, a first water outlet hole, a second inclined piston, a water baffle plate, a spring placing groove and a reset spring, wherein the inclined water outlet plug is fixedly arranged in the inclined hole, the inclined pushing tube is arranged on the inclined water outlet plug, the inclined pushing tube is communicated with the transportation pipeline through the first water outlet hole arranged on the inclined water outlet plug, the second buffer spring is arranged between the inclined water outlet plug and the first inclined piston, two ends of the second buffer spring are fixedly connected with the inclined water outlet plug and the first inclined piston respectively, the second water outlet hole is coaxially arranged on the first inclined piston, the water baffle plate is arranged at one end, far away from the second buffer spring, of the first inclined piston, the water baffle plate slides in the second water outlet hole through the second inclined piston, the spring placing groove is arranged at one end, the reset spring is arranged in the spring placing groove, two ends of the reset spring are respectively fixedly connected with the water baffle plate bottom.
Preferably, the inclined hole is inclined upward.
Preferably, the rounded corners are matched with the surface of the water blocking ball.
Preferably, the water inflow in the water inlet pipe is regulated and controlled by an external load water inlet device.
Preferably, the transport block to be polished is matched with the water dropping tank, a gap is reserved between the transport block to be polished and the inner side wall of the transport pipeline, and the water flowing hole is positioned between the transport block to be polished and the inner side wall of the transport pipeline.
Preferably, a plurality of the water flowing holes communicate the inner space of the water falling tank with the transportation pipe.
The beneficial effects of the invention are as follows:
1. the water flow hole is arranged between the transport block to be polished and the inner side wall of the transport pipeline, so that water flow is convenient to drive the transport block to be polished to move together and flow out, the speed of water flow flowing out of the water flow hole can be controlled by regulating and controlling the water inflow of the water inlet pipe, and the speed of water flow carrying the transport block to be polished to fall together is finally achieved.
2. According to the invention, when the speed of the transport block to be polished is greater than the speed of water flowing out of the water flowing hole, the transport block to be polished can push the water flow, so that the water aggregation phenomenon is formed below the transport block to be polished, the aggregated water can play a role in obstructing the descending of the transport block to be polished, otherwise, the speed of the transport block to be polished is less than the speed of water flowing out of the water flowing hole, meanwhile, the water aggregation phenomenon is formed above the transport block to be polished, the water flow can push the transport block to be polished to descend, and the transport block to be polished has a pushing effect.
Drawings
FIG. 1 is a schematic view of a polishing article transporting and cleaning apparatus according to the present invention;
FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;
FIG. 3 is a schematic view of a reflow chamber of a polishing article transporting and cleaning apparatus according to the present invention;
FIG. 4 is an enlarged schematic view of the structure at B in FIG. 3;
FIG. 5 is an enlarged schematic view of the structure at C in FIG. 4;
fig. 6 is an enlarged schematic view of the structure at D in fig. 5.
In the figure: the device comprises a conveying pipeline 1, a water dropping tank 2, a water inlet pipe 3, a backflow cavity 4, a conveying block to be polished 5, a water flowing hole 6, a first round groove 7, a second round groove 8, a round angle 9, a first buffer spring 10, a baffle ring 11, a water blocking ball 12, a tilting hole 13, a second buffer spring 14, a tilting water outlet plug 15, a tilting pushing pipe 16, a first water outlet hole 17, a first tilting piston 18, a second water outlet hole 19, a second tilting piston 20, a water baffle plate 21, a spring placing groove 22 and a return spring 23.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-6, a polishing object transportation cleaning device comprises a transportation pipeline 1 and a water falling box 2, wherein the water falling box 2 is positioned above the transportation pipeline 1, the caliber of the water falling box 2 is smaller than that of the transportation pipeline 1, a plurality of water flowing holes 6 are formed in the bottom of the water falling box 2, the water flowing holes 6 are communicated with the inner space of the water falling box 2 and the transportation pipeline 1, water is conveniently fed into the water falling box 2 from a water inlet pipe 3, and then flows out of the water falling box 2 through the water flowing holes 6 to drive a to-be-polished transportation block 5 to move together.
The side wall of the water falling tank 2 is provided with a water inlet pipe 3 for water inflow, and the water inflow in the water inlet pipe 3 is regulated and controlled by external load water inlet equipment, so that the flow speed of water flow in the water falling tank 2 is convenient to control.
The transportation is to be polished transport block 5 in transport pipeline 1, wait to polish transport block 5 and fall water tank 2 looks adaptation, wait to polish transport block 5 and transport pipeline 1 inside wall between have the clearance, and water hole 6 is located and wait to polish between transport block 5 and the transport pipeline 1 inside wall, ensures to reach the speed of control water hole 6 outflow rivers through the intake of regulation and control inlet tube 3 to finally reach the rivers and carry the speed of waiting to polish transport block 5 to fall together.
A backflow cavity 4 is arranged in the side wall of the transportation pipeline 1, a plurality of backflow groups are respectively arranged in the backflow cavity 4, and each backflow group comprises a water inlet system comprising water blocking balls 12 for blocking water and a water outlet system comprising a first inclined piston 18.
When the speed of the transport block 5 to be polished is greater than the speed of water flowing out of the water flowing hole 6, the transport block 5 to be polished can push the water flow, so that the water aggregation phenomenon is formed below the transport block 5 to be polished, the aggregated water can lower the transport block 5 to be polished to have an obstructing effect, otherwise, the speed of the transport block 5 to be polished is less than the speed of water flowing out of the water flowing hole 6, the water aggregation phenomenon is formed above the transport block 5 to be polished, the water flow can push the transport block 5 to be polished to lower, and the transport block 5 to be polished has a pushing effect.
Referring to fig. 4, the water inlet system comprises a first circular groove 7, a second circular groove 8, a round corner 9, a first buffer spring 10 and a baffle ring 11, wherein the first circular groove 7 and the second circular groove 8 are coaxially arranged and communicated, the round corner 9 is arranged on the second circular groove 8 on the opposite side of the first circular groove 7 and the second circular groove 8, the round corner 9 is matched with the surface of a water blocking ball 12, so that the water blocking ball 12 is tightly attached to the round corner 9 when no water pressure exists, water can not flow into the backflow cavity 4, and the influence on the water flow velocity in the transportation pipeline 1 is caused.
The gathered water can also push against the water blocking ball 12 in the first circular groove 7, so that the water blocking ball 12 is forced to move and leave the circular bead 9, and the water enters the backflow cavity 4 through the second circular groove 8, the circular bead 9 and the first circular groove 7.
The baffle ring 11 is arranged on the inner side wall of the second round groove 8, the first buffer spring 10 is arranged between the baffle ring 11 and the water blocking ball 12, the two ends of the first buffer spring 10 are respectively fixedly connected with the baffle ring 11 and the water blocking ball 12, when the inner side wall of the transportation pipeline 1 has no water pressure, the water blocking ball 12 cannot move, the water blocking ball 12 is tightly attached to the round corner 9 under the action of the first buffer spring 10, and water in the transportation pipeline 1 cannot enter the backflow cavity 4.
The water outlet system comprises an inclined hole 13, a second buffer spring 14, an inclined water outlet plug 15, an inclined pushing pipe 16, a first water outlet hole 17, a second water outlet hole 19, a second inclined piston 20, a water baffle 21, a spring placing groove 22 and a reset spring 23, wherein the inclined water outlet plug 15 is fixedly arranged in the inclined hole 13, the inclined hole 13 is inclined upwards, so that burrs easy to clean on the side wall of the to-be-polished transport block 5 can be removed by water impact, and the effect of cleaning surface dust can be achieved.
The inclined pushing pipe 16 is arranged on the inclined water outlet plug 15, the inclined pushing pipe 16 is communicated with the inside of the transportation pipeline 1 through a first water outlet hole 17 formed in the inclined water outlet plug 15, the second buffer spring 14 is arranged between the inclined water outlet plug 15 and the first inclined piston 18, and two ends of the second buffer spring 14 are fixedly connected with the inclined water outlet plug 15 and the first inclined piston 18 respectively, so that kinetic energy can be guaranteed when water is extruded out of the inclined hole 13, and the side wall of the transportation block 5 to be polished can be conveniently washed.
The water entering the return chamber 4 enters the inclined hole 13 and pushes the first inclined piston 18 upward, so that the first inclined piston 18 presses the second buffer spring 14 and continuously approaches the inclined pushing tube 16.
The second water outlet hole 19 is coaxially formed in the first inclined piston 18, the water baffle 21 is arranged at one end, far away from the second buffer spring 14, of the first inclined piston 18, the water baffle 21 slides in the second water outlet hole 19 through the second inclined piston 20, the spring placing groove 22 is formed in one end, far away from the second buffer spring 14, of the first inclined piston 18, the return spring 23 is arranged in the spring placing groove 22, two ends of the return spring 23 are fixedly connected with the groove bottom of the spring placing groove 22 and the water baffle 21 respectively, and therefore, when the first inclined piston 18 is pushed by water, the water is pushed to the water baffle 21 in advance by the inclined pushing pipe 16.
When the inclined pushing tube 16 is inserted into the second water outlet 19 in the first inclined piston 18, the second inclined piston 20 is pushed to leave the first inclined piston 18 with the water baffle 21, and the water entering the backflow cavity 4 enters the inclined pushing tube 16 through the second water outlet 19 on the first inclined piston 18, and then is ejected through the inclined pushing tube 16 and the first water outlet 17 formed on the inclined water outlet plug 15.
The water inlet system is communicated with the water outlet system through the backflow cavity 4, so that water entering the backflow cavity 4 from the first round groove 7 can enter the inclined hole 13, and then is sprayed out from the inclined water outlet plug 15.
The working principle of the invention is as follows: firstly, water is fed into the water falling box 2 in a constant quantity through the water inlet pipe 3, and then flows out of the water falling box 2 through the water flowing hole 6, wherein a gap is reserved between the to-be-polished conveying block 5 and the inner side wall of the conveying pipeline 1, water flows conveniently, the water flowing hole 6 is positioned between the to-be-polished conveying block 5 and the inner side wall of the conveying pipeline 1, so that water conveniently drives the to-be-polished conveying block 5 to move together and flow out, the water flowing speed of the water flowing out of the water flowing hole 6 can be controlled by regulating and controlling the water inflow of the water inlet pipe 3, and finally the water carrying and falling speed of the to-be-polished conveying block 5 together can be achieved.
Further, when the speed of the transport block 5 to be polished is greater than the speed of water flow flowing out of the water flow hole 6, the transport block 5 to be polished can push the water flow, so that the water aggregation phenomenon is formed below the transport block 5 to be polished, the aggregated water can lower the transport block 5 to be polished to have an obstructing effect, otherwise, the speed of the transport block 5 to be polished is less than the speed of water flow flowing out of the water flow hole 6, the water aggregation phenomenon is formed above the transport block 5 to be polished, the water flow can push the transport block 5 to be polished to lower, and the transport block 5 to be polished has a pushing effect.
The gathered water can also push against the water blocking ball 12 in the first circular groove 7, so that the water blocking ball 12 is forced to move and leave the circular bead 9, and the water enters the backflow cavity 4 through the second circular groove 8, the circular bead 9 and the first circular groove 7.
It should be noted that, when no water pressure exists on the inner side wall of the transportation pipeline 1, the water blocking ball 12 cannot move, so that the water blocking ball 12 is tightly attached to the round corner 9 under the action of the first buffer spring 10, and water in the transportation pipeline 1 cannot enter the backflow cavity 4.
Then, the water entering the backflow cavity 4 enters the inclined hole 13 and pushes the first inclined piston 18 to move upwards, so that the first inclined piston 18 presses the second buffer spring 14 to be continuously close to the inclined pushing tube 16, when the inclined pushing tube 16 is inserted into the second water outlet hole 19 in the first inclined piston 18 and pushes the second inclined piston 20 to leave the first inclined piston 18 with the water baffle 21, the water entering the backflow cavity 4 enters the inclined pushing tube 16 through the second water outlet hole 19 in the first inclined piston 18, and then is sprayed out through the inclined pushing tube 16 and the first water outlet hole 17 formed in the inclined water outlet plug 15.
It should be noted that, the spun water column can strike on waiting to polish transport block 5 lateral wall, and the spun water column is upwards for the slope in addition, so can be fine will wait to polish transport block 5 lateral wall on easy burr that clears away with the water impact get rid of, can play the effect of clean surface dust simultaneously.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a polishing article transportation cleaning equipment, includes transportation pipeline (1) and falls into water case (2), its characterized in that, fall into water case (2) are located transportation pipeline (1) top, fall into water case (2) bore is less than transportation pipeline (1) bore, fall into water case (2) bottom is provided with a plurality of flow holes (6), fall into water case (2) lateral wall is provided with inlet tube (3) that are used for intaking, transportation has transportation piece (5) waiting to polish in transportation pipeline (1), be provided with backward flow chamber (4) in transportation pipeline (1) lateral wall, a plurality of backward flow groups have been seted up in backward flow chamber (4) respectively, a plurality of backward flow groups are including the water inlet system that contains the ball (12) that blocks water and the play water system that contains first slope piston (18) that are used for the manger plate, through backward flow chamber (4) intercommunication between water inlet system and the play water system.
2. The polishing article transporting and cleaning device according to claim 1, wherein the water inlet system comprises a first circular groove (7), a second circular groove (8), a round corner (9), a first buffer spring (10) and a blocking ring (11), the first circular groove (7) and the second circular groove (8) are coaxially arranged and communicated, the round corner (9) is arranged on the second circular groove (8) on the opposite side of the first circular groove (7) and the second circular groove (8), the blocking ring (11) is arranged on the inner side wall of the second circular groove (8), the first buffer spring (10) is arranged between the blocking ring (11) and the blocking ball (12), and two ends of the first buffer spring (10) are fixedly connected with the blocking ring (11) and the blocking ball (12) respectively.
3. The polishing article transporting and cleaning device according to claim 1, wherein the water outlet system comprises an inclined hole (13), a second buffer spring (14), an inclined water outlet plug (15), an inclined pushing tube (16), a first water outlet hole (17), a second water outlet hole (19), a second inclined piston (20), a water baffle plate (21), a spring placing groove (22) and a return spring (23), wherein the inclined water outlet plug (15) is fixedly arranged in the inclined hole (13), the inclined pushing tube (16) is arranged on the inclined water outlet plug (15), the inclined pushing tube (16) is communicated with the inside of the transportation pipeline (1) through a first water outlet hole (17) formed in the inclined water outlet plug (15), the second buffer spring (14) is arranged between the inclined water outlet plug (15) and the first inclined piston (18), two ends of the second buffer spring (14) are fixedly connected with the inclined water outlet plug (15) and the first inclined piston (18) respectively, the second water outlet hole (19) is coaxially formed in the inclined water outlet plug (15) and the first inclined piston (18), the second buffer spring (14) is arranged at one end of the inclined water baffle plate (21) away from the first inclined piston (18), the spring placing groove (22) is formed in one end, far away from the second buffer spring (14), of the first inclined piston (18), the reset spring (23) is arranged in the spring placing groove (22), and two ends of the reset spring (23) are fixedly connected with the bottom of the spring placing groove (22) and the water baffle (21) respectively.
4. A sanding article transport cleaning device according to claim 3, characterized in that the inclined holes (13) are inclined upwards.
5. A sanding article transport cleaning device according to claim 2, characterized in that the rounded corners (9) are adapted to the surface of a water-resistant ball (12).
6. A polishing article transportation and cleaning apparatus according to claim 1, characterized in that the water intake in the water intake pipe (3) is regulated by an external load water intake apparatus.
7. The polishing article transporting and cleaning device according to claim 1, wherein the transporting block (5) to be polished is matched with the water falling box (2), a gap is reserved between the transporting block (5) to be polished and the inner side wall of the transporting pipeline (1), and the water flowing hole (6) is positioned between the transporting block (5) to be polished and the inner side wall of the transporting pipeline (1).
8. A polished object transportation cleaning apparatus according to claim 1, characterized in that a plurality of the water flow holes (6) communicate with the internal space of the water fall tank (2) and the transportation pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110039746.3A CN112871839B (en) | 2021-01-13 | 2021-01-13 | Polishing object transportation cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110039746.3A CN112871839B (en) | 2021-01-13 | 2021-01-13 | Polishing object transportation cleaning equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112871839A CN112871839A (en) | 2021-06-01 |
| CN112871839B true CN112871839B (en) | 2024-03-29 |
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ID=76044900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110039746.3A Active CN112871839B (en) | 2021-01-13 | 2021-01-13 | Polishing object transportation cleaning equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN112871839B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101166B (en) * | 2021-10-29 | 2023-04-18 | 郑州大学第一附属医院 | Paediatrics cardiovascular medical equipment processing apparatus |
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| CN111744876A (en) * | 2020-07-07 | 2020-10-09 | 杨洲 | Sawdust recovery plant |
| CN111905914A (en) * | 2020-07-07 | 2020-11-10 | 北京沄汇智能科技有限公司 | Floating and sinking separating device |
| CN111871923A (en) * | 2020-07-28 | 2020-11-03 | 杨年生 | Plank self-cleaning device of high-efficient clean type |
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