Intelligent feeding device for phosphite antioxidant and feeding method of intelligent feeding device
Through the combination of grinding and screening components and combined with heat dissipation treatment, the problem of phosphite antioxidants agglomeration during the delivery process is solved, achieving smooth feeding and cost reduction.
Patent Information
- Application Number
- CN202411551783.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2024-12-13
AI Technical Summary
Phosphite antioxidants are prone to absorb water and agglomeration during storage and transportation, resulting in uneven feeding and congestion of pipelines, increasing the cost of equipment operation.
An intelligent feeding device including a grinding assembly, a screening assembly and a heat dissipation assembly is designed to grind and sieved the phosphite antioxidant through a funnel-type feed tube. The heat dissipation assembly keeps the grinding assembly working within a predetermined temperature range to avoid Caulk and smooth delivery of phosphite antioxidants through propeller blades and crushing knives.
It effectively avoids the agglomeration problem of phosphite antioxidants during the transportation process, improves the smoothness of feeding, and reduces equipment costs.
Smart Images

Figure CN119114228A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of intelligent feeding, and in particular relates to an intelligent feeding device and a feeding method for a phosphite antioxidant. Background Art
[0002] Phosphite antioxidant is a kind of auxiliary antioxidant, and its main function is to decompose hydroperoxide. The generation and accumulation of hydroperoxide is the most critical step in the degradation of organic polymer materials. When a certain concentration of hydroperoxide is generated, the free radical oxidation reaction will be rapidly promoted. Therefore, phosphite antioxidant is very important for the inhibition of aging.
[0003] Phosphite antioxidants have certain hygroscopicity and hydrolysis. If they are not stored properly or the ambient humidity is high, they are easy to absorb moisture and form agglomerates. When the phosphite antioxidant needs to be transported, since it is transported at room temperature, if the ambient humidity is controlled for transportation, the cost of operating the equipment will increase. If the ambient humidity is not controlled, the phosphite antioxidant will form agglomerates during the transportation process. The agglomerated phosphite antioxidant will affect the smoothness of the material discharge, leading to problems such as pipeline blockage and uneven feeding. In severe cases, the entire feeding system may not work properly. Summary of the invention
[0004] Purpose of the invention: To provide an intelligent feeding device and feeding method for phosphite antioxidant, so as to solve the above problems existing in the prior art.
[0005] Technical solution: A smart feeding device for phosphite antioxidant, comprising a mounting base shell, a grinding assembly being installed on the top of the mounting base shell in the transverse direction, a funnel-shaped feeding pipe being installed at one end of the grinding assembly, a screening assembly being connected to the discharge end of the grinding assembly, one discharge port of the screening assembly discharging small particles of phosphite antioxidant, and the other discharge port of the screening assembly discharging large particles of phosphite antioxidant, a heat dissipation assembly being further provided on the outside of the grinding assembly, the heat dissipation assembly being wrapped around the outside of the grinding assembly, and the grinding assembly being subjected to heat dissipation treatment by the heat dissipation assembly, so that the grinding assembly can always operate within a predetermined stable range.
[0006] Preferably, the grinding assembly includes a cylindrical shell, which is laterally arranged on the top of the mounting base shell, the funnel-shaped feed pipe is installed at one end of the cylindrical shell, and the other end of the cylindrical shell is connected to the screening assembly, a conveying part is rotatably installed in the cylindrical shell, and a driving source is installed on the end of the conveying part near the funnel-shaped feed pipe, and the driving source is used to drive the conveying part to rotate in the cylindrical shell, grind the phosphite antioxidant fed from the funnel-shaped feed pipe and convey it to the screening assembly.
[0007] Preferably, the conveying part includes a connecting column, which rotatably connects the end of the cylindrical shell and one end of which is connected to the output end of the driving source, and the other end of the connecting column is connected to a grinding column, and the grinding column extends from the end near the connecting column toward the screening component, and the diameter of the end of the grinding column near the funnel-shaped feed pipe is smaller than the diameter of the end near the screening component, and the end of the grinding column near the screening component is in contact with the inner wall surface of the cylindrical shell, and the end of the grinding column near the screening component is connected to a conical guide column, and the conical guide column is integrally formed with the grinding column, and the outer wall of the grinding column is sleeved with a propeller blade.
[0008] Preferably, the heat dissipation assembly includes a plurality of annular shells, which are sleeved on the outside of the cylindrical shell along a linear array, and a fan is installed at the lower end of the annular shell. A heat sink is provided in the annular shell, and the heat sink is sleeved in the cylindrical shell. The annular shell is provided with a plurality of heat dissipation holes, and the heat dissipation holes are arranged opposite to the fan.
[0009] Preferably, a dustproof shell is sleeved on the outside of the heat dissipation component, and a plurality of ventilation holes are provided on the side wall of the dustproof shell.
[0010] Preferably, the screening assembly includes a mounting base, which is arranged at the end of the mounting base shell, a power source is installed at one end of the mounting base, and a screening shell is installed on the top surface of the other end of the mounting base, a feed hole is opened on the side wall of the screening shell close to the grinding assembly, a large particle discharge pipe is installed on the side wall of the screening shell opposite to the feed hole, a crushing part is installed in the screening shell, the crushing part is transmission-connected to the power source, a large particle screening plate is installed in the screening shell, the large particle screening plate is located above the crushing part, a small particle discharge pipe is connected to the bottom of the screening shell, a small particle screening plate is installed between the screening shell and the small particle discharge pipe, and the crushing part is partially in contact with the small particle screening plate surface.
[0011] Preferably, the crushing part includes a rotating shaft, which is rotatably mounted on the screening shell, and a mounting block is sleeved on the rotating shaft in a linear array, and the mounting block adopts a triangular mounting block, and a crushing knife is installed at the top corner of each mounting block, and the long direction of the crushing knife is parallel to the central axis of the rotating shaft. Positioning knives are installed on the opposite side walls of the screening shell, and when the rotating shaft rotates, a gap is formed between the positioning knife and the crushing knife.
[0012] A method for intelligently feeding a phosphite antioxidant, which implements the feeding of the phosphite antioxidant by using the above-mentioned intelligent feeding device for the phosphite antioxidant, comprises the following steps: Step 1, adding a phosphite antioxidant into a grinding assembly through a funnel-shaped feed pipe, and grinding the united phosphite antioxidant through the grinding assembly; Step 2, after the grinding component completes grinding of the united phosphite antioxidant, the phosphite antioxidant is transported to the screening component, the phosphite antioxidant in the screening component is screened, the phosphite antioxidant is further crushed and screened, and the small particles and large particles of the phosphite antioxidant are screened and separated; Step 3: When the grinding component is grinding the united phosphite antioxidant, the grinding component is cooled by the heat dissipation component so that the grinding component is always kept within a predetermined temperature range to grind the united phosphite antioxidant.
[0013] Preferably, the grinding process of the grinding assembly is as follows: Driven by the driving source, the conveying part is driven to rotate in the cylindrical shell, and the propeller blades in the conveying part convey the united phosphite antioxidant to the direction of the crushing component, and the united phosphite antioxidant is ground under the cooperation of the grinding column and the cylindrical shell; During the grinding process, the heat sink is used to dissipate heat from the cylindrical shell, and the fan is used to blow air into the annular shell. With the cooperation of the heat dissipation holes, a directional air flow is formed in the annular shell, so that the grinding component always works within the predetermined temperature range.
[0014] Preferably, the screening process of the screening assembly is as follows: After the ground phosphite antioxidant is transported to the screening component, it is preliminarily screened by the large-particle screening plate, and the large-particle phosphite antioxidant is discharged from the screening component through the large-particle discharge pipe. The remaining part enters the crushing part, and with the cooperation of the positioning knife and the crushing knife, the screened phosphite antioxidant is crushed again, and discharged from the screening component through the small-particle screening plate and the small-particle discharge pipe.
[0015] Beneficial effect: The present invention relates to an intelligent feeding device for phosphite antioxidant and a feeding method thereof. When the phosphite antioxidant is conveyed, the phosphite antioxidant is introduced into a grinding component through a funnel-shaped feeding pipe. With the cooperation of the grinding component, the phosphite antioxidant is conveyed and ground at the same time, thereby effectively avoiding the problem of agglomeration of the phosphite antioxidant during the conveying process. At the same time, after the phosphite antioxidant falls into the screening component, the phosphite antioxidant is screened and crushed, so that the phosphite antioxidant can be smoothly fed, which can not only improve the smooth conveying of the phosphite antioxidant, but also reduce the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of a grinding assembly of the present invention; Figure 3 is a schematic diagram of a heat dissipation assembly of the present invention; Figure 4 It is a schematic diagram of the grinding column of the present invention; Figure 5 is a schematic diagram of a grinding assembly of the present invention; Figure 6 is a cross-sectional view of a grinding assembly of the present invention; Figure 7 It is a schematic diagram of the crushing unit of the present invention.
[0017] Figures 1 to 7 The reference numerals in the figure are: 1. mounting base shell; 2. grinding assembly; 3. funnel-shaped feed pipe; 4. screening assembly; 5. heat dissipation assembly; 6. dustproof shell 201, cylindrical shell; 202, driving source; 203, connecting column; 204, grinding column; 205, conical guide column; 206, propeller blade; 401, mounting base; 402, power source; 403, screening shell; 404, feed hole; 405, large particle discharge pipe; 406, large particle screening plate; 407, small particle discharge pipe; 408, small particle screening plate; 409, rotating shaft; 410, mounting block; 411, crushing knife; 412, positioning knife; 501, annular shell; 502, fan; 503, heat sink; 504, heat dissipation hole. DETAILED DESCRIPTION
[0018] like Figures 1 to 7 As shown, the present invention provides a technical solution: a phosphite antioxidant intelligent feeding device and a feeding method thereof, comprising a mounting base shell 1, a grinding component 2, a screening component 4 and a heat dissipation component 5, wherein the grinding component 2 is installed on the top of the mounting base shell 1 in the transverse direction, a funnel-shaped feeding pipe 3 is installed at one end of the grinding component 2, and the discharge end of the grinding component 2 is connected to the screening component 4, as shown in FIG. Figure 6As shown, one of the discharge ports of the screening component 4 discharges small particles of phosphite antioxidant, and the other discharge port of the screening component 4 discharges large particles of phosphite antioxidant. The outside of the grinding component 2 is connected to the heat dissipation component 5, and the grinding component 2 is subjected to heat dissipation treatment by the heat dissipation component 5, so that the grinding component 2 can always work within a predetermined stable range. When the phosphite antioxidant is transported, the phosphite antioxidant enters the grinding component 2 through the funnel-shaped feeding pipe 3. With the cooperation of the grinding component 2, the phosphite antioxidant is transported and ground at the same time, which effectively avoids the problem of phosphite antioxidant agglomeration during transportation. At the same time, after the phosphite antioxidant falls into the screening component 4, the phosphite antioxidant is screened and crushed, so that the phosphite antioxidant can be smoothly fed, which can not only improve the smooth transportation of the phosphite antioxidant, but also reduce the equipment cost.
[0019] In a further embodiment, Figure 2 and Figure 4 As shown, the grinding component 2 includes a cylindrical shell 201, and the cylindrical shell 201 is horizontally arranged on the top of the mounting base shell 1, the funnel-shaped feeding pipe 3 is installed at one end of the cylindrical shell 201, and the other end of the cylindrical shell 201 is connected to the screening component 4, and a conveying part is rotatably installed in the cylindrical shell 201, and the conveying part includes a connecting column 203, and the connecting column 203 rotates the end of the connecting column 203-shaped shell 201, and one end of the connecting column 203 is connected to the output end of the driving source 202, wherein the driving source 202 can be a motor, but is not limited to a motor, and the other end of the connecting column 203 is connected to the grinding column 204, and the grinding column 204 extends from the end close to the connecting column 203 toward the screening component 4, and the grinding column The diameter of the end of 204 near the funnel-shaped feed pipe 3 is smaller than the diameter of the end near the screening component 4. The end of the grinding column 204 near the screening component 4 contacts the inner wall of the cylindrical shell 201. The outer wall of the grinding column 204 is sleeved with a propeller blade 206, so that the phosphite antioxidant can be transported in cooperation with the grinding column 204 and the propeller blade 206. The grinding column 204 cooperates with the inner wall of the cylindrical shell 201 to gradually grind the united phosphite antioxidant. The end of the grinding column 204 near the screening component 4 is connected to a conical guide column 205, and the conical guide column 205 is integrally formed with the grinding column 204. After grinding, the phosphite antioxidant flows into the screening component 4 in cooperation with the conical guide column 205.
[0020] In a further embodiment, Figure 2 and Figure 3As shown, the heat dissipation component 5 includes a plurality of annular shells 501. In this embodiment, five groups of annular shells 501 are used. The annular shells 501 are sleeved on the outside of the cylindrical shell 201 along a linear array. A fan 502 is installed at the lower end of the annular shell 501. A heat sink 503 is arranged in the annular shell 501. The heat sink 503 is sleeved in the cylindrical shell 201. The annular shell 501 is provided with a plurality of heat dissipation holes 504. The heat dissipation holes 504 are arranged opposite to the fan 502. That is, with the cooperation of the fan 502 and the heat sink 503, the grinding component 2 can grind the phosphite antioxidant within a predetermined temperature range. The outside of the heat dissipation component 5 is sleeved with a dustproof shell 6. The side wall of the dustproof shell 6 is provided with a plurality of ventilation holes to prevent dust from accumulating on the outside of the heat dissipation component 5 during long-term use, thereby affecting the heat dissipation effect.
[0021] In a further embodiment, the screening component 4 includes a mounting base 401, which is arranged at the end of the mounting base shell 1, and a power source 402 is installed at one end of the mounting base 401, wherein the power source 402 can be a motor, but is not limited to a motor, and a screening shell 403 is installed on the top surface of the other end of the mounting base 401, and a feed hole 404 is opened on the side wall of the screening shell 403 close to the grinding component 2, and a large particle discharge pipe 405 is installed on the side wall of the screening shell 403 opposite to the feed hole 404, and a crushing part is installed in the screening shell 403, and the crushing part includes a rotating shaft 409, and the rotating shaft 409 is rotatably installed on the screening shell 403, and the rotating shaft 409 is transmission-connected to the power source 402, and a linear array of mounting blocks 410 are sleeved on the rotating shaft 409, such as Figure 7 As shown, three groups of mounting blocks 410 are used in this embodiment, and the mounting blocks 410 are triangular mounting blocks 410. A crushing knife 411 is installed at the top corner of each mounting block 410, and the long direction of the crushing knife 411 is parallel to the central axis of the rotating shaft 409. Positioning knives 412 are installed on the opposite side walls of the screening shell 403. When the rotating shaft 409 rotates, a gap is formed between the positioning knife 412 and the crushing knife 411. A large particle screening plate 406 is installed in the screening shell 403, and the large particle screening plate 406 is located above the crushing part. A small particle discharge pipe 407 is connected to the bottom of the screening shell 403, and a small particle screening plate 408 is installed between the screening shell 403 and the small particle discharge pipe 407. The crushing knife 411 in the crushing part is in surface contact with the small particle screening plate 408.
[0022] Through the above-mentioned feeding device, the present invention can realize the following working process: A phosphite antioxidant intelligent feeding method comprises the following steps: Step 1: adding phosphite antioxidant into the grinding assembly 2 through the funnel-shaped feed pipe 3, and grinding the united phosphite antioxidant through the grinding assembly 2. The grinding process of the grinding assembly 2 is as follows: Driven by the driving source 202, the conveying part is driven to rotate in the cylindrical shell 201, and the propeller blades 206 in the conveying part convey the united phosphite antioxidant toward the grinding component, and the united phosphite antioxidant is ground under the cooperation of the grinding column 204 and the cylindrical shell 201; During the grinding process, the heat sink 503 is used to dissipate heat for the cylindrical shell 201, and the fan 502 is used to blow air into the annular shell 501. With the cooperation of the heat dissipation holes 504, a directional air flow is formed in the annular shell 501, so that the grinding component 2 always operates within the predetermined temperature range.
[0023] Step 2: After the grinding component 2 completes the grinding of the united phosphite antioxidant, it is transported to the screening component 4, and the phosphite antioxidant in the screening component 4 is screened. The screening process of the screening component 4 is as follows: After the ground phosphite antioxidant is conveyed to the screening component 4, the phosphite antioxidant is preliminarily screened by the large particle screening plate 406, and the large particles of the phosphite antioxidant are discharged from the screening component 4 through the large particle discharge pipe 405, and the remaining part enters the crushing part, and the small particles and the large particles of the phosphite antioxidant are screened and separated. After the small particles of the phosphite antioxidant fall into the crushing part, the screened phosphite antioxidant is crushed again with the cooperation of the positioning knife 412 and the crushing knife 411, and discharged from the screening component 4 through the small particle screening plate 408 and the small particle discharge pipe 407, so that the smooth transportation of the phosphite antioxidant can be achieved, which can not only improve the smooth transportation of the phosphite antioxidant, but also reduce the equipment cost.
[0024] Step 3: When the grinding component 2 is grinding the united phosphite antioxidant, the grinding component 2 is cooled by the heat dissipation component 5, so that the grinding component 2 is always kept within a predetermined temperature range to grind the united phosphite antioxidant.
[0025] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.
Claims
1. A phosphite antioxidant intelligent feeding device, characterized in that: The invention comprises a mounting base shell (1), a grinding assembly (2) being mounted on the top of the mounting base shell (1) in the transverse direction, a funnel-shaped feed pipe (3) being mounted on one end of the grinding assembly (2), a screening assembly (4) being connected to the discharge end of the grinding assembly (2), one discharge port of the screening assembly (4) discharging small particles of phosphite antioxidant, and the other discharge port of the screening assembly (4) discharging large particles of phosphite antioxidant, and a heat dissipation assembly (5) being arranged outside the grinding assembly (2), the heat dissipation assembly (5) being wrapped around the outside of the grinding assembly (2), and heat dissipation treatment being performed on the grinding assembly (2) by the heat dissipation assembly (5), so that the grinding assembly (2) can always be kept working within a predetermined stable range.
2. The intelligent feeding device for phosphite antioxidant according to claim 1, characterized in that: The grinding assembly (2) comprises a cylindrical shell (201), wherein the cylindrical shell (201) is arranged on the top of the mounting base shell (1) in the transverse direction, the funnel-shaped feed pipe (3) is installed at one end of the cylindrical shell (201), and the other end of the cylindrical shell (201) is connected to the screening assembly (4), a conveying part is rotatably installed in the cylindrical shell (201), and a driving source (202) is installed at the end of the conveying part close to the funnel-shaped feed pipe (3), and the driving source (202) is used to drive the conveying part to rotate in the cylindrical shell (201), so as to grind the phosphite antioxidant fed from the funnel-shaped feed pipe (3) and convey it to the screening assembly (4).
3. The intelligent feeding device for phosphite antioxidant according to claim 2, characterized in that: The transmission part comprises a connecting column (203), wherein the connecting column (203) rotates the end of the connecting column (203)-shaped shell (201) and one end thereof is connected to the output end of the driving source (202), and the other end of the connecting column (203) is connected to a grinding column (204), wherein the grinding column (204) extends from the end close to the connecting column (203) toward the screening component (4), wherein the diameter of the end of the grinding column (204) close to the funnel-shaped feeding pipe (3) is smaller than the diameter of the end close to the screening component (4), wherein the end of the grinding column (204) close to the screening component (4) contacts the inner wall surface of the cylindrical shell (201), and the end of the grinding column (204) close to the screening component (4) is connected to a conical guide column (205), wherein the conical guide column (205) and the grinding column (204) are integrally formed, and the outer wall of the grinding column (204) is sleeved with a propeller blade (206).
4. The intelligent feeding device for phosphite antioxidant according to claim 1, characterized in that: The heat dissipation assembly (5) comprises a plurality of annular shells (501), the annular shells (501) being sleeved on the outside of the cylindrical shell (201) along a linear array, a fan (502) being installed at the lower end of each annular shell (501), a heat sink (503) being arranged inside the annular shell (501), the heat sink (503) being sleeved inside the cylindrical shell (201), the annular shell (501) being provided with a plurality of heat dissipation holes (504), the heat dissipation holes (504) being arranged opposite to the fan (502).
5. The intelligent feeding device for phosphite antioxidant according to claim 4, characterized in that: The heat dissipation component (5) is sleeved with a dustproof shell (6) on its exterior, and a plurality of ventilation holes are provided on a side wall of the dustproof shell (6).
6. The intelligent feeding device for phosphite antioxidant according to claim 1, characterized in that: The screening component (4) comprises a mounting base (401), the mounting base (401) being arranged at the end of the mounting base shell (1), a power source (402) being installed at one end of the mounting base (401), a screening shell (403) being installed on the top surface of the other end of the mounting base (401), a feed hole (404) being provided on the side wall of the screening shell (403) close to the grinding component (2), a large particle discharge pipe (405) being installed on the side wall of the screening shell (403) opposite to the feed hole (404), and the A crushing part is installed in the screening shell (403), and the crushing part is transmission-connected to the power source (402). A large-particle screening plate (406) is installed in the screening shell (403), and the large-particle screening plate (406) is located above the crushing part. A small-particle discharge pipe (407) is connected below the screening shell (403), and a small-particle screening plate (408) is installed between the screening shell (403) and the small-particle discharge pipe (407). The crushing part is partially in surface contact with the small-particle screening plate (408).
7. The intelligent feeding device for phosphite antioxidant according to claim 6, characterized in that: The crushing part comprises a rotating shaft (409), the rotating shaft (409) is rotatably mounted on the screening shell (403), a mounting block (410) is sleeved in a linear array on the rotating shaft (409), the mounting block (410) is a triangular mounting block (410), a crushing knife (411) is mounted at the top corner of each mounting block (410), the length direction of the crushing knife (411) is parallel to the central axis of the rotating shaft (409), and positioning knives (412) are mounted on opposite side walls in the screening shell (403), and when the rotating shaft (409) rotates, a gap is formed between the positioning knife (412) and the crushing knife (411).
8. A method for intelligently feeding a phosphite antioxidant, wherein the feeding of the phosphite antioxidant is achieved by using an intelligent feeding device for a phosphite antioxidant as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, adding a phosphite antioxidant into the grinding component (2) through a funnel-shaped feeding pipe (3), and grinding the agglomerated phosphite antioxidant through the grinding component (2); Step S2, after the grinding component (2) completes grinding of the united phosphite antioxidant, the phosphite antioxidant is transported to the screening component (4), the phosphite antioxidant in the screening component (4) is screened, the phosphite antioxidant is further crushed and screened, and small particles and large particles of the phosphite antioxidant are screened and separated; Step S3, when the grinding component (2) is grinding the united phosphite antioxidant, the grinding component (2) is subjected to heat dissipation treatment by the heat dissipation component (5), so that the grinding component (2) is always kept within a predetermined temperature range to grind the united phosphite antioxidant.
9. A phosphite antioxidant intelligent feeding method according to claim 8, characterized in that: The grinding process of the grinding component (2) is as follows: Driven by the driving source (202), the conveying part is driven to rotate in the cylindrical shell (201), and the propeller blades (206) in the conveying part convey the agglomerated phosphite antioxidant toward the grinding component, and the agglomerated phosphite antioxidant is ground in cooperation with the grinding column (204) and the cylindrical shell (201); During the grinding process, the heat sink (503) is used to dissipate heat from the cylindrical shell (201), and the fan (502) is used to blow air into the annular shell (501). With the cooperation of the heat dissipation holes (504), a directional air flow is formed in the annular shell (501), so that the grinding component (2) always operates within a predetermined temperature range.
10. A phosphite antioxidant intelligent feeding method according to claim 8, characterized in that: The screening process of the screening component (4) is as follows: After the ground phosphite antioxidant is conveyed to the screening component (4), the phosphite antioxidant is preliminarily screened by a large particle screening plate (406), and the large particles of the phosphite antioxidant are discharged from the screening component (4) through a large particle discharge pipe (405). The remaining part enters the crushing section, and the screened phosphite antioxidant is crushed again with the cooperation of a positioning knife (412) and a crushing knife (411), and is discharged from the screening component (4) through a small particle screening plate (408) in cooperation with a small particle discharge pipe (407).
Citation Information
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