Screening device for pet food processing

Abstract

A screening device for pet food processing belongs to the field of pet food processing equipment, and is characterized in that end covers are respectively arranged on two end faces of a multi-stage screen drum, a mandrel is assembled at the center, and the side face is divided into a large screen hole area, a medium screen hole area and a small screen hole area; the material collecting shell and the multi-stage screen drum form a material collecting bin; the scraping plate is arranged on the mandrel; the inner gear ring is installed on an annular installation base at the end of the multi-stage screen drum, the driven gear is installed at the end of the mandrel, the motor is in driving connection with the driving gear, and the driving gear is in meshing transmission connection with the driven gear and the inner gear ring to drive the multi-stage screen drum and the scraping plate to rotate and swing in the opposite directions. An output shaft of the air cylinder extends out and ejects the mandrel outwards, so that the driven gear is separated from the driving gear, and the motor can conveniently adjust the screening station of the multi-stage screen drum. And the mandrel resetting assembly resets the mandrel, so that the driving gear is in meshed connection with the driven gear. The pet food screening device is used for screening pet food raw materials or finished products, the product quality and the production efficiency are improved, and the pet food production requirements with different particle size requirements are met.

Description

Technical Field

[0001] The present invention belongs to the field of pet food processing equipment and relates to a screening device for screening pet food to meet the production needs of pet food with different particle size requirements. Technical Background

[0002] During pet food processing, raw materials and finished products must be screened to remove impurities and separate materials of varying particle sizes. Traditional pet food screening devices suffer from low screening efficiency and precision, impacting production efficiency and product quality. Therefore, a highly efficient, precise, and easy-to-clean screening device is needed to meet the demands of pet food processing. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and to propose a screening device for pet food processing, which has the characteristics of high screening efficiency and high screening accuracy.

[0004] The technical solution of the present invention is as follows: A screening device for pet food processing includes a multi-stage screen drum, an aggregate shell, a scraper, a drive unit, a station switching unit, etc.

[0005] 1. Multi-stage screen drum The multi-stage screen drum is equipped with end caps at each end, and the feed inlet for the entire screening device is located on one of the end caps. A core shaft is assembled in the center of the multi-stage screen drum. The side of the multi-stage screen drum is divided into three screening stations based on the size of the screen holes: a large, medium, and small screen area. These three screening stations are evenly distributed along the circumference of the multi-stage screen drum, allowing for graded screening of materials of varying particle sizes, improving work efficiency and screening accuracy.

[0006] 2. Aggregate shell The aggregate shell is placed outside the multi-stage screen drum, and the interlayer space between the multi-stage screen drum forms an aggregate bin. The end face of the aggregate bin is equipped with an annular baffle. The bottom of the aggregate shell has a discharge channel for collecting the screened material.

[0007] 3. Scraper The scraper plate is installed on the core shaft through a connecting rod and is located between the core shaft and the multi-stage screen drum. It can loosen the material, prevent material accumulation, and prevent material from adhering to the screen drum.

[0008] 4. Drive unit The drive unit includes a motor, a driving gear, a driven gear, and an inner ring gear. An annular mounting seat extends outward from the end of the multi-stage screen drum, and the inner ring gear is mounted on the annular mounting seat. The driven gear is mounted on the end of the core shaft, with the driving gear located between the inner ring gear and the driven gear. The motor drives the driving gear, which meshes with the driven gear and the inner ring gear.

[0009] The motor drives the driving gear, which drives the multi-stage screen drum and the scraper plate to rotate and swing in opposite directions, so that the material can fully contact the screen drum, prevent material accumulation, and improve screening efficiency.

[0010] 5. Workstation switching unit The station switching unit consists of a cylinder and a mandrel reset assembly. The cylinder and driven gear are positioned opposite each other. The cylinder output shaft extends and pushes the mandrel outward, separating the driven gear from the driving gear, allowing the motor to adjust the screening position of the multi-stage screen drum. The mandrel reset assembly resets the mandrel, allowing the driving gear to mesh with the driven gear.

[0011] Furthermore, the core shaft reset assembly includes a reset base, a reset rod, a slider, a reset spring, and a fixed block; the top of the reset base is provided with a slide groove that slides with the slider, the two ends of the reset rod are respectively connected to the core shaft and the slider, the fixed block is fixed to the reset base, and the reset spring is installed between the fixed block and the reset rod.

[0012] Furthermore, the output shaft of the cylinder is provided with a connector, and the end face of the connector is provided with a blind hole matching the end of the core shaft.

[0013] When the screening position of the multi-section screen drum needs to be adjusted, the cylinder output shaft extends, and the end of the core shaft enters the blind hole on the end face of the connector. The cylinder output shaft continues to extend, overcoming the spring force and pushing the core shaft axially outward, so that the driven gear is separated from the driving gear. At this time, the motor drives the inner gear ring to turn the appropriate screen area on the multi-stage screen drum downward. After the adjustment of the screening station is completed, the cylinder resets, the connector is separated from the core shaft, and under the action of the reset spring, the reset rod resets along the slide groove, driving the core shaft to reset its axial displacement, so that the driven gear and the driving gear re-engage; at this time, the motor works and can drive the scraper plate and the multi-stage screen drum to make a small reciprocating rotation and swinging motion, and the screening work has been carried out.

[0014] 6. Air drying unit Furthermore, the screening device also includes an air drying unit, which includes a fan, an air supply hose, an air flow channel, and an air outlet head. The air flow channel is built into the scraper, the air supply hose is connected to the fan and the air flow channel respectively, and the air outlet head is installed at the end of the air flow channel.

[0015] During screening, when the fan is operating, air flows through the air hose and air channel, blowing towards the material to achieve air drying. After screening, the air drying unit can clean the sieve holes of the multi-stage sieve drum to prevent material from sticking.

[0016] Furthermore, the air outlet head includes an air plug, an air outlet spring, and a fixing ring; the fixing ring is installed on the inner wall of the air flow channel, the air plug is located at the end of the air flow channel, and the air outlet spring is installed between the fixing ring and the air plug.

[0017] Under the action of the spring, the air plug is pulled into the end of the air flow channel to close the air flow channel, so that only screening work can be carried out without air drying; when the fan is working, the air flow passes through the air hose and the air flow channel in turn. Under the action of air pressure, it overcomes the force of the air outlet spring, pushes the air plug outward, and discharges the gas to dry the material or clean the screen drum.

[0018] As the scraper rotates and swings, the air flow blows towards the material to dry it. In addition, the air flow sweeps the sieve holes of the multi-stage screen drum to achieve the purpose of drying and cleaning the multi-stage screen drum and prevent the material from sticking to the multi-stage screen drum.

[0019] Furthermore, the air plug comprises a circular platform with a smaller top and a larger bottom, and a cover plate. The circular platform is fixed to the inner end of the cover plate. A spring acts to close the cover plate over the end of the airflow channel. Under the action of airflow pressure, the air plug overcomes the spring force and opens. The side structure of the circular platform cooperates with the end of the airflow channel, and the degree of airflow opening can be adjusted by the extension of the air plug.

[0020] Furthermore, a sleeve is provided outside the core shaft, and both ends of the sleeve are respectively installed on the two end covers of the multi-stage screen drum; a fan-shaped notch is provided at the bottom of the sleeve so that the scraper plate can swing back and forth to scrape the material.

[0021] Furthermore, one end of the air delivery hose is connected to the fan, the middle part is built into the interlayer space between the core shaft and the sleeve, and the other end passes through the inner cavity of the connecting rod and enters the scraper plate and is connected to the air flow channel.

[0022] 7. Dust collection unit Furthermore, the screening device also includes a dust collection unit, which includes a dust inlet, a dust collection duct, and a dust collector. The dust collector is externally mounted, the dust inlet is fixedly mounted on the sleeve, and its opening faces upward. The dust collection duct is built into the interlayer space between the core shaft and the sleeve, and its ends are connected to the dust inlet and the dust collector, respectively. The dust collection unit effectively collects dust generated during the screening process, maintaining a clean working environment.

[0023] Compared with the prior art, the advantages and innovations of the present invention are as follows: 1. Multi-stage screening: By setting up multi-stage screen drums, graded screening of materials with different particle sizes can be achieved to meet the processing needs of various pet foods.

[0024] 2. Efficient screening: The driving unit makes the multi-stage screen drum and scraper plate rotate and swing in opposite directions, increasing the contact opportunity between the material and the screen holes and improving the screening efficiency.

[0025] 3. Flexible station switching: The station switching unit can easily adjust the screening station of the multi-stage screen drum to meet the screening needs of materials with different particle sizes. The operation is simple and fast.

[0026] 4. Air drying function: The air drying unit can not only dry the material, but also clean the sieve holes of the multi-stage screen drum to prevent the material from sticking and reduce cleaning and maintenance costs.

[0027] 5. Dust collection: The dust collection unit effectively collects the dust generated during the screening process, reduces the pollution of dust to the environment, and protects the health of operators.

[0028] The screening device of the present invention is suitable for the pet food processing industry and can be used to screen raw materials or finished products such as pet dry food and pet snacks, thereby improving product quality and production efficiency and meeting the production needs of pet food with different particle size requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the end structure of the screening device of the present invention (the motor is not shown); Figure 2 A top view of the screening device of the present invention (the driving gear and the driven gear are meshing); Figure 3 A top view of the screening device of the present invention (the motor is not shown, and the driving gear and the driven gear are separated); Figure 4 Schematic diagram of the structure of the multi-stage screen drum in the present invention; Figure 5 Schematic diagram of the structure of the station switching unit in the present invention; Figure 6 Schematic diagram of the internal structure of the multi-stage screen drum in the present invention; Figure 7 This is a schematic diagram of the structure between the air drying unit, the dust collection unit, and the scraper plate in the present invention; Figure 8 Schematic diagram of the structure of the air outlet head of the air drying unit in the present invention (the air flow channel is closed and open respectively); Figure 9 This is a schematic diagram of the structure between the sleeve, core shaft, and scraper plate in the present invention; In the figure: multi-stage screen drum 1, end cover 1-1, feed port 1-2, large screen hole area 1-3, medium screen hole area 1-4, small screen hole area 1-5, annular mounting base 1-6; Aggregate shell 2, annular baffle 2-1, discharge channel 2-2; Scraper 3, connecting rod 3-1; Mandrel 4; Motor 5-1, driving gear 5-2, driven gear 5-3, inner ring gear 5-4; Cylinder 6, cylinder output shaft 6-1, connector 6-2, blind hole 6-2-1; Reset base 7-1, reset rod 7-2, slider 7-3, reset spring 7-4, fixed block 7-5, slide groove 7-6; Gas delivery hose 8-1, air flow channel 8-2, gas outlet head 8-3, gas plug 8-3-1, round table 8-3-1-1, cover plate 8-3-1-2, gas outlet spring 8-3-2, fixing ring 8-3-3; Sleeve 9, fan-shaped notch 9-1; Dust inlet 10. DETAILED DESCRIPTION

[0030] Example 1 like Figure 1 As shown, a screening device for pet food processing includes a multi-stage screen drum 1, an aggregate shell 2, a scraper 3, a drive unit, and a station switching unit.

[0031] End covers 1-1 are provided on both end faces of the multi-stage screen drum, and a feed port 1-2 is provided on one of the end covers. Figure 4 As shown, the side of the multi-stage screen drum is divided into three screening stations according to the size of the screen holes. The three screening stations are evenly distributed along the circumference of the multi-stage screen drum, specifically: large screen hole area 1-3, medium screen hole area 1-4, small screen hole area 1-5, which can meet the graded screening of materials with different particle sizes.

[0032] Preferably, the end cover is rotatably assembled with the multi-stage screen drum, and both ends of the core shaft 4 are respectively assembled with the end covers through shaft sleeves, and the core shaft is installed at the center of the multi-stage screen drum.

[0033] 2. Aggregate shell The aggregate shell 2 is placed outside the multi-stage screen drum 1, and the interlayer space between the multi-stage screen drum forms an aggregate bin, the end face of which is provided with an annular baffle 2-1. The bottom of the aggregate shell is provided with a discharge channel 2-2 for collecting the screened material.

[0034] 3. Scraper like Figure 6 As shown, the scraper plate 3 is mounted on the core shaft 4 through the connecting rod 3-1.

[0035] 4. Drive unit The drive unit includes a motor 5-1, a driving gear 5-2, a driven gear 5-3, and an inner ring gear 5-4. An annular mounting seat 1-6 extends outward from the end of the multi-stage screen drum 1, onto which the inner ring gear is mounted. The driven gear is mounted on the end of the core shaft 4, with the driving gear located between the inner ring gear and the driven gear. The motor drives the driving gear, which in turn meshes with the driven gear and the inner ring gear. The motor drives the driving gear, which in turn drives the multi-stage screen drum and the scraper plate to rotate and swing in opposite directions, preventing material accumulation.

[0036] 5. Workstation switching unit The workstation switching unit includes a cylinder 6 and a core shaft reset assembly, and the cylinder 6 and the driven gear are arranged relative to each other.

[0037] like Figure 3 As shown, the cylinder output shaft 6-1 extends outward and pushes the core shaft outward, which can separate the driven gear from the driving gear so that the motor can adjust the screening position of the multi-stage screen drum; Figure 2 As shown, the core shaft is reset by the core shaft reset assembly, so that the driving gear and the driven gear are engaged and connected.

[0038] like Figure 5 As shown, the mandrel reset assembly includes a reset base 7-1, a reset rod 7-2, a slider 7-3, a reset spring 7-4, and a fixed block 7-5. The top of the reset base is provided with a slide groove 7-6 that slidably engages the slider. The reset rod's ends are connected to the mandrel and the slider, respectively. The fixed block is fixed to the reset base, and the reset spring is installed between the fixed block and the reset rod. If needed, the reset base can be installed on the same-side end cap.

[0039] Preferably, the output shaft of the cylinder is provided with a connector 6-2, and the end face of the connector is provided with a blind hole 6-2-1 matching the end of the core shaft.

[0040] Example 2 Based on Example 1, the screening device is further provided with an air drying unit, such as Figure 7 As shown, the air drying unit includes a blower, an air supply hose 8-1, an air flow channel 8-2 and an air outlet head 8-3. The air flow channel is built into the scraper, the air supply hose is connected to the blower and the air flow channel respectively, and the air outlet head is installed at the end of the air flow channel.

[0041] like Figure 8 As shown, the air outlet head includes an air plug 8-3-1, an air outlet spring 8-3-2, and a fixing ring 8-3-3; the fixing ring is installed on the inner wall of the air flow channel, the air plug is located at the end of the air flow channel, and the air outlet spring is installed between the fixing ring and the air plug.

[0042] like Figure 7 、 Figure 9 As shown, a sleeve 9 is installed outside the core shaft, with its ends mounted on the two end caps of the multi-stage screen drum. A fan-shaped notch 9-1 is provided at the bottom of the sleeve. One end of the air hose is connected to the fan, with the middle portion nestled in the interlayer space between the core shaft and the sleeve. The other end passes through the inner cavity of the connecting rod, enters the scraper plate, and connects to the airflow channel.

[0043] Preferably, the air plug includes a round platform 8-3-1-1 with a small top and a large bottom, and a cover plate 8-3-1-2, and the round platform is fixed to the inner end of the cover plate. Figure 8As shown, under the action of a spring, the cover plate closes at the end of the airflow channel. Under the action of airflow pressure, the air plug overcomes the spring force and opens. The side structure of the frustum cooperates with the end of the airflow channel, and the degree of airflow opening can be adjusted by the extension of the air plug.

[0044] Example 3 Based on Example 2, the screening device is further provided with a dust collection unit, which includes a dust inlet 10, a dust collection duct, and a dust collector. The dust collector is externally mounted, the dust inlet is fixedly mounted on the sleeve, and its opening faces upward. The dust collection duct is built into the interlayer space between the core shaft and the sleeve, and its two ends are connected to the dust inlet and the dust collector respectively.

[0045] Example 4 Based on Example 3, the working process of a screening device for pet food processing is as follows: 1) Adjust the screening station; The motor does not work, start the cylinder, the cylinder output shaft extends and contacts the end of the core shaft (the end of the core shaft enters the blind hole on the end face of the cylinder output shaft connector); The cylinder output shaft continues to extend, overcoming the force of the reset spring and pushing the core shaft axially outward (the core shaft moves axially along the slide groove through the reset rod and the slider), separating the driven gear from the driving gear; At this time, the cylinder remains stationary, the motor works, and the motor drives the inner gear ring to rotate the multi-stage screen drum, turning the appropriate screen hole area on the multi-stage screen drum downward; 2) Screening work; After the adjustment of the screening station is completed, the motor stops working, the cylinder resets, and the cylinder output shaft separates from the core shaft; Under the action of the reset spring, the reset rod is displaced axially along the slide groove, driving the core shaft to reset axially, so that the driven gear and the driving gear are re-engaged; At this time, the cylinder does not work, but the motor works, which can drive the scraper plate and the multi-stage screen drum to make a small reciprocating rotation and swinging motion to perform screening work; 3) Air drying and cleaning; Under the action of the air outlet spring, the air plug is pulled into the end of the air flow channel, closing the air flow channel, and only screening work is performed without air drying the material; Alternatively, turn on the fan, and the air flow passes through the air hose and the air flow channel in sequence. Under the action of air pressure, it overcomes the force of the air outlet spring, pushes the air plug outward, and discharges the gas to dry the material (there is material in the screen drum) or clean the screen drum (there is no material in the screen drum); 4) Vacuuming work; Start the vacuum cleaner, and the dust raised in the multi-stage screen drum will be collected and discharged through the dust inlet and the dust collection pipe.

Claims

1. A screening device for pet food processing, comprising: The multi-stage screen drum is provided with end covers on both ends, a core shaft is installed in the center, and three screening stations are evenly distributed on its side. The three screening stations are divided into large screen area, medium screen area and small screen area according to the size of the screen holes. The aggregate shell is placed outside the multi-stage screen drum, and the interlayer space between the aggregate shell and the multi-stage screen drum forms an aggregate bin, and the bottom of the aggregate shell is provided with a discharge channel; The scraper is installed on the core shaft through a connecting rod and is located between the core shaft and the multi-stage screen drum; The drive unit includes a motor, a driving gear, a driven gear, and an inner gear ring; an annular mounting seat is provided at the end of the multi-stage screen drum extending outward, the inner gear ring is mounted on the annular mounting seat, the driven gear is mounted on the end of the core shaft, and the driving gear is located between the inner gear ring and the driven gear; the motor drives the driving gear, and the driving gear is respectively engaged with the driven gear and the inner gear ring to drive the multi-stage screen drum and the scraper plate to rotate and swing in opposite directions; The workstation switching unit includes a cylinder and a core shaft reset assembly; the cylinder and the driven gear are arranged relative to each other, the cylinder output shaft extends outward and pushes the core shaft outward to separate the driven gear from the driving gear so that the motor can adjust the screening position of the multi-stage screen drum; the core shaft is reset by the core shaft reset assembly, so that the driving gear and the driven gear are meshed and connected.

2. A screening device for pet food processing according to claim 1, characterized in that: An end cover of the multi-stage screen drum is provided with a feed port, and an end surface of the collecting bin is provided with an annular baffle.

3. The screening device for pet food processing according to claim 1, wherein: The core shaft reset assembly includes a reset base, a reset rod, a slider, a reset spring, and a fixed block; The top of the reset base is provided with a sliding groove that slidably cooperates with the slider. The two ends of the reset rod are respectively connected to the core shaft and the slider. The fixed block is fixed to the reset base, and the reset spring is installed between the fixed block and the reset rod.

4. A screening device for pet food processing according to claim 3, characterized in that: The output shaft of the cylinder is provided with a connector, and the end surface of the connector is provided with a blind hole matching the end of the core shaft.

5. The screening device for pet food processing according to claim 1, wherein: It also includes an air drying unit, which includes a fan, an air supply hose, an air flow channel, and an air outlet head; the air flow channel is built into the scraper plate, the air supply hose is respectively connected to the fan and the air flow channel, and the air outlet head is installed at the end of the air flow channel.

6. A screening device for pet food processing according to claim 5, characterized in that: The air outlet head includes an air plug, an air outlet spring, and a fixing ring; the fixing ring is installed on the inner wall of the air flow channel, the air plug is located at the end of the air flow channel, and the air outlet spring is installed between the fixing ring and the air plug.

7. A screening device for pet food processing according to claim 6, characterized in that: The air plug includes a round table with a small upper part and a large lower part, and a cover plate. The round table is fixed to the inner end of the cover plate. Under the action of a spring, the cover plate covers the end of the air flow channel. Under the action of air flow pressure, the air plug overcomes the spring force and opens.

8. The screening device for pet food processing according to claim 6, wherein: A sleeve is provided outside the core shaft, and both ends of the sleeve are respectively installed on the two end covers of the multi-stage screen drum; a fan-shaped notch is provided at the bottom of the sleeve so that the scraper plate can swing back and forth to scrape the material.

9. A screening device for pet food processing according to claim 8, characterized in that: One end of the air delivery hose is connected to the fan, the middle part is built into the interlayer space between the core shaft and the sleeve, and the other end passes through the inner cavity of the connecting rod and enters the scraper plate and is connected to the air flow channel.

10. A screening device for pet food processing according to claim 9, characterized in that: It also includes a dust suction unit, which includes a dust inlet, a dust suction pipe, and a dust cleaner; the dust cleaner is external, the dust inlet is fixedly mounted on the sleeve, and the opening faces upward, the dust suction pipe is built into the interlayer space between the core shaft and the sleeve, and its two ends are respectively connected to the dust inlet and the dust cleaner.

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