CN113786929B - Raw material pretreatment device for pig feed processing - Google Patents
Raw material pretreatment device for pig feed processing Download PDFInfo
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- CN113786929B CN113786929B CN202111096127.4A CN202111096127A CN113786929B CN 113786929 B CN113786929 B CN 113786929B CN 202111096127 A CN202111096127 A CN 202111096127A CN 113786929 B CN113786929 B CN 113786929B
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- cylinder
- pretreatment
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- chamber
- feeding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N17/00—Apparatus specially adapted for preparing animal feeding-stuffs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
Abstract
The invention relates to the technical field of feed processing and discloses a raw material pretreatment device for pig feed processing, which comprises a pretreatment cylinder, wherein two ends of the pretreatment cylinder are respectively connected with a feeding cylinder and a discharging cylinder, the inner wall of the pretreatment cylinder is provided with a shoveling plate, a receiving groove is arranged in the pretreatment cylinder, the top of the receiving groove is connected with a receiving hopper, the bottom of the receiving groove is connected with a magnet, the receiving groove is connected with a discharging pipe, the discharging pipe extends into the discharging cylinder, the feeding cylinder is provided with a feeding hole, an air outlet and a light impurity outlet, the discharging cylinder is provided with an air inlet and a discharging hole, and the joint of the discharging cylinder and the pretreatment cylinder is provided with an annular baffle plate. The invention has simple structure and convenient use, can remove metal and various light impurities in raw materials, greatly shortens pretreatment time, improves working efficiency, has good impurity removal effect and high impurity removal rate, reduces production cost and occupies small space.
Description
Technical Field
The invention relates to the technical field of feed processing, in particular to a raw material pretreatment device for pig feed processing.
Background
Before feed processing, various raw materials of processed feed need to be subjected to pretreatment such as magnetic separation and impurity removal so as to remove metal impurities, plastic fragments, dust and other impurities in the raw materials, and most impurity removal devices in the prior art can only remove one type of impurities, so that the raw materials need to be subjected to multiple devices to remove the impurities completely, the time is long, the working efficiency is low, multiple devices need to be purchased, the production cost is high, and the occupied space is large.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a raw material pretreatment device for pig feed processing.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a pig feed processing is with raw materials preprocessing device, includes the preprocessing section of thick bamboo that the slope set up, preprocessing section of thick bamboo is connected with actuating mechanism, preprocessing section of thick bamboo's both ends rotate respectively and are connected with feed cylinder and ejection of compact section of thick bamboo, evenly be equipped with a plurality of material boards along circumference on preprocessing section of thick bamboo's the inner wall, be equipped with in the preprocessing section of thick bamboo and connect the silo, connect the top of silo to be connected with and connect the hopper, the bottom is connected with magnet, connect the silo to be connected with feed cylinder and ejection of compact section of thick bamboo respectively through the link that locates its both ends, connect the silo to be connected with the discharging pipe, the discharging pipe extends to in the ejection of compact section of thick bamboo, feed cylinder locates the higher tip of preprocessing section of thick bamboo, is equipped with feed inlet, air outlet and light impurity export on the feed cylinder, be equipped with air intake and discharge gate on the ejection of compact section of thick bamboo, the junction of thick bamboo and preprocessing section of thick bamboo is equipped with annular striker plate.
Preferably, the driving mechanism comprises a base, a first gear and a second gear, the feeding cylinder and the discharging cylinder are both fixed on the base, supporting riding wheels are arranged on two sides of the pretreatment cylinder, the supporting riding wheels are rotationally connected on the base, the first gear is coaxially connected on the pretreatment cylinder, the second gear is rotationally connected on the base and meshed with the first gear, the second gear is connected with a driving motor, and the driving motor is fixed on the base.
Preferably, the end part of the shoveling plate is connected with an extension plate.
Preferably, the feeding cylinder comprises an air outlet chamber, a light impurity discharging chamber and a feeding chamber which are sequentially connected along the axial direction, the inner diameter of the air outlet chamber is larger than that of the feeding chamber, the air outlet is arranged in the air outlet chamber, the inner diameter of the light impurity discharging chamber is gradually reduced from the end part connected with the air outlet chamber, a ventilating plate made of a screen mesh is arranged in the light impurity discharging chamber, the light impurity outlet is arranged in the light impurity discharging chamber, the feeding chamber is connected with the pretreatment cylinder, and the feeding inlet is arranged in the feeding chamber.
Preferably, a partition plate is arranged in the discharging cylinder, a vent hole is arranged on the partition plate, the partition plate divides the discharging cylinder into a metal discharging chamber and a raw material discharging chamber, a metal impurity outlet is arranged on the metal discharging chamber, a material guide plate is arranged between the metal impurity outlet and the pretreatment cylinder, the discharging port is arranged in the raw material discharging chamber, an iron removing scraping plate is arranged below the magnet, and the iron removing scraping plate is connected with a reciprocating mechanism.
Preferably, the reciprocating mechanism comprises a threaded rod and a guide rod, wherein the threaded rod and the guide rod are connected between the feeding cylinder and the discharging cylinder, the threaded rod is connected with an iron removing motor, the iron removing scraping plate is connected with a connecting block and a guide block, an internal threaded hole matched with the threaded rod is formed in the connecting block, and a guide hole matched with the guide rod in a sliding mode is formed in the guide block.
Preferably, a connecting shaft is coaxially arranged in the discharging cylinder, a dispersing fan blade is connected to the connecting shaft, and a dispersing motor is connected to the connecting shaft.
The invention also comprises other components which can ensure that the raw material pretreatment device for pig feed processing is normally used, and the components are all conventional technical means in the field. In addition, the devices or components not defined in the present invention are all conventional in the art.
The invention has simple structure and convenient use, can remove metal and various light impurities in raw materials, greatly shortens pretreatment time, improves working efficiency, has good impurity removal effect and high impurity removal rate, reduces production cost and occupies small space.
Drawings
Fig. 1 is a schematic structural view of the present embodiment.
Fig. 2 is an axial cross-sectional view of the feed cylinder, pretreatment cylinder, and take-off cylinder of fig. 1.
FIG. 3 is a cross-sectional view taken along A-A of the pretreatment cartridge of FIG. 1.
Fig. 4 is a schematic view of the structure of the separator in fig. 2.
In the figure: the pretreatment device comprises a pretreatment cylinder 1, a feeding cylinder 2, a discharging cylinder 3, a material shoveling plate 4, a material receiving groove 5, a material receiving hopper 6, a magnet 7, a material discharging pipe 8, a material feeding port 9, a material outlet 10, a light impurity outlet 11, an air inlet 12, a material discharging port 13, a material blocking plate 14, a supporting riding wheel 15, an extension plate 16, a ventilation plate 17, a partition plate 18, a ventilation hole 19, a metal impurity outlet 20, a material guiding plate 21, a deironing scraper 22, a threaded rod 23, a guide rod 24 and a dispersing fan blade 25.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1-4, a raw material pretreatment device for pig feed processing comprises a pretreatment cylinder 1 which is obliquely arranged, wherein the pretreatment cylinder 1 is connected with a driving mechanism, two ends of the pretreatment cylinder 1 are respectively and rotatably connected with a feed cylinder 2 and a discharge cylinder 3, a plurality of shoveling plates 4 are uniformly arranged on the inner wall of the pretreatment cylinder 1 along the circumferential direction, a receiving groove 5 is arranged in the pretreatment cylinder 1, the top of the receiving groove 5 is connected with a receiving hopper 6, the bottom of the receiving groove 5 is connected with a magnet 7, the receiving groove 5 is respectively connected with the feed cylinder 2 and the discharge cylinder 3 through connecting frames arranged at two ends of the receiving groove 5, the receiving groove 5 is connected with a discharge pipe 8, the discharge pipe 8 extends into the discharge cylinder 3, the feed cylinder 2 is arranged at the higher end part of the pretreatment cylinder 1, a feed inlet 9, an air outlet 10 and a light impurity outlet 11 are arranged on the feed cylinder 2, an air inlet 12 and a discharge outlet 13 are arranged on the discharge cylinder 3, and an annular baffle 14 is arranged at the joint of the discharge cylinder 3 and the pretreatment cylinder 1. The baffle plate can prevent raw materials which are not subjected to impurity removal in the pretreatment cylinder from entering the discharge cylinder, so that the impurity removal effect is ensured.
The driving mechanism comprises a base, a first gear and a second gear, the feeding cylinder 2 and the discharging cylinder 3 are fixed on the base, supporting riding wheels 15 are arranged on two sides of the pretreatment cylinder 1, the supporting riding wheels 15 are rotationally connected to the base, the first gear is coaxially connected to the pretreatment cylinder 1, the second gear is rotationally connected to the base and meshed with the first gear, the second gear is connected with a driving motor, and the driving motor is fixed on the base. The supporting riding wheel 15 is used for supporting the pretreatment cylinder 1, and the pretreatment cylinder 1 is driven to rotate through the first gear and the second gear after the driving motor is started. In this embodiment, two sets of supporting roller sets are provided, each set of supporting roller sets including two supporting rollers 15.
An extension plate 16 is connected to the end of the material-making plate 4. In this embodiment, the extension plate 16 extends in a direction perpendicular to the shoveling plate 4, and other angles of the extension plate 16 may be provided in actual use. The extension plate 16 can prolong the stay time of the raw materials on the shoveling plate 4, thereby avoiding raw materials from accumulating, increasing the dispersibility of the raw materials and improving the impurity separation rate.
The feeding cylinder 2 comprises an air outlet chamber, a light impurity discharging chamber and a feeding chamber which are sequentially connected along the axial direction, the inner diameter of the air outlet chamber is larger than that of the feeding chamber, the air outlet 10 is arranged in the air outlet chamber, the inner diameter of the light impurity discharging chamber is gradually reduced from the end part connected with the air outlet chamber, a ventilating plate 17 made of a screen mesh is arranged in the light impurity discharging chamber, the light impurity outlet 11 is arranged in the light impurity discharging chamber, the feeding chamber is connected with the pretreatment cylinder 1, and the feeding inlet 9 is arranged in the feeding chamber.
The device is characterized in that a partition plate 18 is arranged in the discharging barrel 3, a vent 19 is arranged on the partition plate 18, the partition plate 18 divides the discharging barrel 3 into a metal discharging chamber and a raw material discharging chamber, a metal impurity outlet 20 is arranged on the metal discharging chamber, a material guide plate 21 is arranged between the metal impurity outlet 20 and the pretreatment barrel 1, the discharging hole 13 is arranged in the raw material discharging chamber, an iron removing scraper 22 is arranged below the magnet 7, and the iron removing scraper 22 is connected with a reciprocating mechanism. In the embodiment, the receiving groove 5 is an arc groove, the magnet 7 is an arc matched with the receiving groove 5, and the arrangement is convenient for the magnet 7 to adsorb metal impurities in raw materials positioned in all directions; the end part of the discharging pipe 8 is arranged in the raw material discharging chamber; a plurality of ventilation holes are uniformly formed in the partition plate 18 corresponding to the area between the material receiving groove 5 and the pretreatment cylinder 1; the reciprocating mechanism drives the iron removal scraping plate 22 to move towards the discharging cylinder 3, and can discharge the metal impurities adsorbed on the magnet 7.
The reciprocating mechanism comprises a threaded rod 23 and a guide rod 24, wherein the threaded rod 23 and the guide rod 24 are connected between the feeding cylinder 2 and the discharging cylinder 3, the threaded rod 23 is connected with an iron removing motor, the iron removing scraper 22 is connected with a connecting block and a guide block, an internal threaded hole matched with the threaded rod 23 is formed in the connecting block, and a guide hole matched with the guide rod 24 in a sliding manner is formed in the guide block. The iron removing motor drives the threaded rod to rotate forward and backward, so that the iron removing scraping plate can move back and forth along the axial direction of the pretreatment cylinder; the guide rod guides the movement of the iron removal scraping plate.
The discharging cylinder 3 is internally and coaxially provided with a connecting shaft, the connecting shaft is connected with a dispersing fan blade 25, and the connecting shaft is connected with a dispersing motor.
In this embodiment, the feed inlet 9 is disposed on the side of the feed chamber and below the connecting frame, the threaded rod 23 and the guide rod 24, so that the impact of the raw material feed on the components inside the feed chamber during the descent can be avoided, and the service life of the raw material feed can be prolonged.
Working principle: when in use, raw materials for processing feed enter the feeding chamber of the feeding cylinder 2 from the feeding port 9 and enter the pretreatment cylinder 1 under the action of gravity; the pretreatment cylinder 1 rotates under the action of the driving mechanism, the materials in the pretreatment cylinder 1 continuously move downwards under the action of gravity and are simultaneously lifted by the shoveling plate 4 rotating along with the pretreatment cylinder 1, metal impurities in the materials are adsorbed by the magnet 7 at the bottom of the material receiving groove 5 and separated from the materials, air flow is blown into the material discharging cylinder 3 from the air inlet 12, the air flow enters the pretreatment cylinder 1 through the vent holes on the partition plate 18 and flows reversely with the materials, the light impurities in the materials are taken away, when the shoveling plate 4 rises to the high position, the materials after impurity removal enter the material receiving groove 5 through the material receiving hopper under the action of gravity, then enter the material discharging cylinder 3 from the material discharging pipe 8 and are discharged from the material discharging hole 13; the light impurity enters the feeding cylinder 2 along with the air flow and is blocked by the ventilating plate 17 to fall into the light impurity discharging chamber, and finally is discharged from the light impurity outlet 11, and the air flow is discharged from the air outlet 10.
When the device runs for a period of time, the iron removing motor can be started, the iron removing scraping plate 22 moves along the axial direction of the pretreatment cylinder 1 towards the discharging cylinder 3, the metal impurities adsorbed on the magnet 7 are pushed to the right end of the magnet 7 by the iron removing scraping plate 22 and fall onto the material guiding plate 21 after being separated from the magnet 7, and the material guiding plate 21 guides the metal impurities, so that the metal impurities are prevented from entering the pretreatment cylinder 1 again, and fall into the metal discharging chamber and are discharged from the metal impurity outlet 20.
The material copying plate 4 can disperse and isolate the raw materials in the pretreatment cylinder 1 on one hand, so that the metal impurities in the pretreatment cylinder are adsorbed by the magnet 7; on the other hand, the material shoveling plate 4 is used for shoveling the raw materials to a high place and then scattering the raw materials, so that the dispersity of the raw materials can be further improved, and the light impurities are guaranteed to be completely taken away by air flow.
The air outlet chamber of the feeding barrel 2 is separated from the light impurity discharging chamber by the ventilating plate 17, so that the light impurity can be separated from the air flow, the impurity content in the discharged air flow is reduced, and the subsequent work load of dust removal on the discharged air flow is reduced; the outer contour of the light impurity discharging chamber is in a round table shape, and the arrangement can prevent light impurities separated from the airflow from flowing back into the feeding chamber or the pretreatment cylinder 1 and being mixed into raw materials without impurity removal; since the feed chamber is higher than the light impurity discharge chamber, the raw material entering from the feed port 9 does not enter the light impurity discharge chamber. The feeding cylinder can realize the feeding of raw materials, and can perform primary gas-solid separation on discharged air flow to separate and discharge light impurities carried by the discharged air flow, and the feeding of the raw materials and the discharge of the light impurities are not interfered with each other.
The baffle 18 can block the separated metal impurities from entering the raw material discharging chamber and separate the metal discharging chamber from the raw material discharging chamber; on the other hand, the air flow can be uniformly distributed on the cross section between the receiving groove 5 and the pretreatment cylinder 1 by matching with the dispersing fan blades 25. The discharging cylinder provided by the invention can realize the discharging of raw materials and metal impurities without interference, and has the function of gas distribution.
The invention has simple structure and convenient use, can remove metal and various light impurities in raw materials, greatly shortens pretreatment time, improves working efficiency, has good impurity removal effect and high impurity removal rate, reduces production cost and occupies small space.
The embodiments of the present invention have been described above, the description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (4)
1. Raw materials preprocessing device is used in pig feed processing, including the preprocessing section of thick bamboo of slope setting, its characterized in that: the pretreatment cylinder is connected with a driving mechanism, two ends of the pretreatment cylinder are respectively and rotatably connected with a feed cylinder and a discharge cylinder, a plurality of shoveling plates are uniformly arranged on the inner wall of the pretreatment cylinder along the circumferential direction, a receiving groove is arranged in the pretreatment cylinder, the top of the receiving groove is connected with a receiving hopper, the bottom of the receiving groove is connected with a magnet, the receiving groove is respectively connected with the feed cylinder and the discharge cylinder through connecting frames arranged at the two ends of the receiving groove, the receiving groove is connected with a discharge pipe, the discharge pipe extends into the discharge cylinder, the feed cylinder is arranged at the higher end part of the pretreatment cylinder, a feed inlet, an air outlet and a light impurity outlet are arranged on the feed cylinder, an air inlet and a discharge outlet are arranged on the discharge cylinder, and an annular baffle plate is arranged at the joint of the discharge cylinder and the pretreatment cylinder;
the feeding cylinder comprises an air outlet chamber, a light impurity discharging chamber and a feeding chamber which are sequentially connected along the axial direction, wherein the inner diameter of the air outlet chamber is larger than that of the feeding chamber, the air outlet is arranged in the air outlet chamber, the inner diameter of the light impurity discharging chamber is gradually reduced from the end part connected with the air outlet chamber, a ventilation plate made of a screen mesh is arranged in the light impurity discharging chamber, the light impurity outlet is arranged in the light impurity discharging chamber, the feeding chamber is connected with the pretreatment cylinder, and the feeding inlet is arranged in the feeding chamber;
a baffle plate is arranged in the discharging cylinder, a vent hole is formed in the baffle plate, the discharging cylinder is divided into a metal discharging chamber and a raw material discharging chamber by the baffle plate, a metal impurity outlet is formed in the metal discharging chamber, a guide plate is arranged between the metal impurity outlet and the pretreatment cylinder, the discharge hole is formed in the raw material discharging chamber, an iron removing scraping plate is arranged below the magnet, and the iron removing scraping plate is connected with a reciprocating mechanism;
the reciprocating mechanism comprises a threaded rod and a guide rod, wherein the threaded rod and the guide rod are connected between the feeding cylinder and the discharging cylinder, the threaded rod is connected with an iron removing motor, the iron removing scraping plate is connected with a connecting block and a guide block, an internal threaded hole matched with the threaded rod is formed in the connecting block, and a guide hole matched with the guide rod in a sliding mode is formed in the guide block.
2. The raw material pretreatment device for pig feed processing according to claim 1, wherein: the driving mechanism comprises a base, a first gear and a second gear, the feeding cylinder and the discharging cylinder are both fixed on the base, supporting riding wheels are arranged on two sides of the pretreatment cylinder, the supporting riding wheels are rotationally connected onto the base, the first gear is coaxially connected onto the pretreatment cylinder, the second gear is rotationally connected onto the base and meshed with the first gear, the second gear is connected with a driving motor, and the driving motor is fixed onto the base.
3. The raw material pretreatment device for pig feed processing according to claim 1, wherein: the end part of the shoveling plate is connected with an extension plate.
4. The raw material pretreatment device for pig feed processing according to claim 1, wherein: the discharging cylinder is internally and coaxially provided with a connecting shaft, the connecting shaft is connected with a dispersing fan blade, and the connecting shaft is connected with a dispersing motor.
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| CN202111096127.4A CN113786929B (en) | 2021-09-16 | 2021-09-16 | Raw material pretreatment device for pig feed processing |
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| CN202111096127.4A CN113786929B (en) | 2021-09-16 | 2021-09-16 | Raw material pretreatment device for pig feed processing |
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| CN113786929A CN113786929A (en) | 2021-12-14 |
| CN113786929B true CN113786929B (en) | 2023-09-12 |
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| CN114798162B (en) * | 2022-04-25 | 2024-02-20 | 河北省胸科医院 | Medical waste treatment device |
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