Production process for preparing cat litter from agricultural wastes

Abstract

The invention discloses a production process for preparing cat litter from agricultural wastes, and belongs to the technical field of cat litter production. Comprising a machine base, a mixing box located at the top of the machine base, a stirring shaft rotationally installed between the two ends of the mixing box, stirring blades fixed to the side edge of the stirring shaft, a speed reducer installed at the end of the stirring shaft and a driving motor used for driving the stirring shaft to rotate. The telescopic mechanism composed of the sleeve, the corrugated guide groove and the guide block is arranged at the end of the stirring shaft, and the telescopic mechanism is connected with the output shaft of the speed reducer through the connecting mechanism composed of the sleeve, the outer spline and the inner spline, so that the stirring shaft can stably reciprocate in the axial direction under the guidance of the telescopic mechanism while keeping rotary shearing; the straw powder base material, the bentonite heavy material, the bamboo charcoal powder light material and the binder dry powder form a three-dimensional mixing flow field of radial shearing dispersion and axial pushing exchange in the mixing box, and the phenomenon that local raw materials are stacked or not mixed is avoided.

Description

Technical Field

[0001] This invention relates to a production apparatus, and more particularly to a production process for preparing cat litter using agricultural waste. This invention also relates to a production process, particularly a production process for preparing cat litter using agricultural waste, and belongs to the field of cat litter production technology. Background Technology

[0002] With the popularization of environmental protection concepts and the increasing demand for the resource utilization of agricultural waste, the technology of preparing environmentally friendly cat litter using agricultural waste such as straw, rice husks, and peanut shells has received widespread attention. This technology can not only solve the environmental pollution problems caused by the burning and disposal of agricultural waste, but also replace traditional bentonite cat litter, realizing resource recycling and having significant economic and environmental value.

[0003] In the production process of cat litter made from agricultural waste, raw material mixing is one of the core steps. At present, the cat litter production process generally uses a twin-shaft paddle mixer for raw material mixing. It is mainly used to uniformly mix agricultural waste base materials such as straw powder and corn cob powder with heavy fillers such as bentonite and attapulgite, lightweight functional materials such as bamboo charcoal powder and activated carbon, and dry powders of binders such as starch and guar gum.

[0004] However, existing twin-shaft paddle mixers can only rotate the paddles during mixing, causing materials to form a fixed flow path within the drum, resulting in dead zones and affecting the mixing effect. Furthermore, due to the viscosity of the raw materials and the tendency for static electricity to build up during mixing, the rotating mixer cannot adequately scrape the inner wall, causing some materials to adhere to the drum wall and accumulate. Additionally, the density of cat litter mixing materials varies greatly, causing heavier materials to settle at the bottom and stratify. The poor circulation and tumbling of the heavier materials at the bottom prevents them from fully integrating with the lighter materials on top, ultimately resulting in significant stratification. This leads to uneven distribution of components in the finished cat litter and significant performance fluctuations.

[0005] To address these issues, a production process for preparing cat litter using agricultural waste was designed. Summary of the Invention

[0006] The main objective of this invention is to provide a production process for preparing cat litter using agricultural waste. This process involves a telescopic mechanism consisting of a sleeve, corrugated guide groove, and guide block at the end of the mixing shaft. This mechanism is connected to the output shaft of a reducer via a connecting mechanism composed of a sleeve, external splines, and internal splines. This allows the mixing shaft to simultaneously perform stable axial reciprocating motion under the guidance of the telescopic mechanism while maintaining rotational shearing. This creates a three-dimensional mixing flow field within the mixing tank, where straw powder, bentonite (heavy material), bamboo charcoal powder (light material), and binder powder exhibit radial shear dispersion and axial pushing exchange. This avoids localized material accumulation or unmixed conditions. The process is achieved by rotating the end of the mixing tank... Equipped with an annular plate, and with an L-shaped lever fixedly mounted on the annular plate to fit the bottom of the mixing tank, along with a swing mechanism consisting of a horizontal groove, a downward sliding rod, a vertical groove, a fixed rod, an upper sliding rod, a mounting plate, a sliding groove, a slider, and a crossbar, the annular plate is controlled by the downward sliding rod to drive the L-shaped lever to swing back and forth during the rotation of the mixing shaft. This continuously scrapes the inner wall of the mixing tank, dynamically peeling off adhering fiber clumps and hardened adhesive lumps. In addition, the swinging of the L-shaped lever can lift the heavy raw materials at the bottom of the mixing tank upward, forcibly driving the heavy raw materials at the bottom of the mixing tank to circulate upward, breaking up the sediment layer, and effectively solving the problem of unstable cat litter performance in traditional processes.

[0007] The objective of this invention can be achieved by adopting the following technical solution: A production process for preparing cat litter using agricultural waste includes a base, a mixing box located on top of the base, a stirring shaft rotatably installed between the two ends of the mixing box, stirring blades fixed to the side of the stirring shaft, a reducer installed at the end of the stirring shaft, and a drive motor for driving the stirring shaft to rotate. A transmission chamber is located on the top of the machine base and at the end of the mixing box. A telescopic mechanism is provided at the end of the stirring shaft near the transmission chamber to drive the stirring shaft to move back and forth axially. A connecting mechanism is provided between the end of the stirring shaft away from the transmission chamber and the output shaft of the reducer to realize the power transmission between the stirring shaft and the reducer; Both sides of the mixing box near the transmission chamber are rotatably mounted with annular plates. The stirring shaft passes through the inside of the annular plates, and L-shaped levers that fit against the inner wall of the mixing box are fixed on the sides of the annular plates. The transmission chamber is equipped with a swing mechanism, which is linked to the stirring shaft to drive the annular plate to swing back and forth inside the mixing box.

[0008] Preferably, the connecting mechanism includes a sleeve, an external spline, and an internal spline. The sleeve is rotatably mounted at one end of the mixing box near the reducer. The end of the stirring shaft extends into the inside of the sleeve. An external spline is provided circumferentially at one end of the stirring shaft located inside the sleeve. An internal spline that mates with the external spline is provided inside the sleeve. The end of the sleeve is fixedly connected to the output shaft of the reducer.

[0009] Preferably, the telescopic mechanism includes a sleeve, a corrugated guide groove, and a guide block. The sleeve is symmetrically fixedly installed at one end of the mixing box near the transmission chamber, and the stirring shaft extends from the inside of the sleeve to the inside of the transmission chamber. The end of the stirring shaft is provided with a corrugated guide groove along the circumference. Guide blocks are symmetrically arranged on the inner side of the sleeve, and the guide blocks slide inside the corrugated guide groove.

[0010] Preferably, the swing mechanism includes a horizontal groove, a sliding rod, a vertical groove, and a reciprocating assembly. The horizontal grooves are symmetrically opened on both sides of the mixing box near the transmission chamber. An annular plate covers the side of the horizontal groove. The sliding rod is slidably installed inside the horizontal groove. The side of the annular plate is vertically opened radially along the side. The vertical groove is perpendicular to the horizontal groove. The end of the sliding rod slides inside the vertical groove. A reciprocating assembly is provided at the end of the sliding rod near the inside of the transmission chamber to drive the sliding rod to reciprocate inside the horizontal groove.

[0011] Preferably, the reciprocating assembly includes a fixed rod, an upper sliding rod, a mounting plate, a groove, and a slider. The fixed rod is fixed to the end of the stirring shaft. The upper sliding rod is vertically slidably mounted on the end of the fixed rod. The mounting plate slides along the length of the transmission chamber. A groove is opened on the outer side of the mounting plate along the length. A slider is slidably mounted inside the groove. The slider is fixedly connected to the end of the upper sliding rod. The end of the lower sliding rod is fixedly connected to the bottom end of the mounting plate.

[0012] Preferably, a crossbar is fixedly installed inside the transmission compartment along its length, and the crossbar passes through the mounting plate and is slidably connected to the mounting plate.

[0013] Preferably, the L-shaped lever is made of wear-resistant stainless steel or polyurethane, and the gap between the L-shaped lever and the inner wall and bottom of the mixing box is less than 0.3mm.

[0014] Preferably, the corrugated guide groove has a continuous wave-shaped structure, and the wave amplitude on the corrugated guide groove is 50-100mm.

[0015] Preferably, the guide block is cylindrical in shape, and both the outer wall of the guide block and the inner side of the corrugated guide groove are coated with a wear-resistant coating.

[0016] This invention also provides a production process for preparing cat litter using agricultural waste, comprising the following steps: Step 1: Pre-treatment of agricultural waste raw materials. After sorting and removing impurities, straw, rice husks or peanut shells are cut into 5-10cm sections and dried at 50-70℃ until the moisture content is ≤12%. Then, they are crushed and screened to obtain agricultural waste base material with a particle size of 80-100 mesh. Step 2: Layered feeding. First, add agricultural waste base material into the mixing tank through the weighing feed hopper at the top of the mixing tank. The amount of material added is 60-70% of the total mixing amount. Start the mixing shaft and pre-mix at a speed of 35-40 r / min for 1-2 minutes. Then add heavy filler material, which is bentonite or attapulgite, at a rate of 5-10% of the total mixing amount. Continue mixing for 1-2 minutes. Then add light functional material, which is bamboo charcoal powder or activated carbon, at a rate of 3-5% of the total mixing amount. Mix for 1 minute. Step 3: Compound mixing and cleaning. Add dry binder powder, which is starch or guar gum, at a rate of 10-15% of the total mixing volume. Adjust the drive motor to increase the speed of the mixing shaft to 45-60 r / min. At the same time, the telescopic mechanism drives the mixing shaft to reciprocate along the axis at a frequency of 10-20 times / min. The swing mechanism drives the L-shaped lever to swing back and forth to scrape and clean the inner wall and bottom of the mixing box. Continue mixing for 6-8 minutes. Step 4: Mixing uniformity test. The moisture content and temperature of the mixture are collected by the sensors inside the mixing tank to ensure that the moisture content is 18-25% and the temperature is ≤30℃. At the same time, the uniformity of the mixture is tested. The mixing uniformity CV value is required to be ≤2%. If it does not meet the standard, the mixing time is extended by 0.5-1 minute. Step 5: Material conveying and granulation. The uniformly mixed material is conveyed to the granulation equipment through the star-shaped discharge valve at the bottom of the mixing tank. The granulation equipment adopts a screw extruder or ring die pellet mill. The granulation temperature is controlled at 80-120℃ to obtain cat litter pellets with a diameter of 2-4mm. Step 6: Finished product processing. The granulated cat litter granules are dried at 50-80℃ to a moisture content of 3-5%, cooled to room temperature, and then screened to remove unqualified granules. After that, they are subjected to ultraviolet-ozone composite sterilization treatment for 5-8 minutes, and finally packaged to obtain environmentally friendly cat litter made from agricultural waste.

[0017] The beneficial effects of this invention are as follows: This invention provides a production process for preparing cat litter using agricultural waste. By setting a telescopic mechanism consisting of a sleeve, corrugated guide groove, and guide block at the end of the stirring shaft, and connecting it to the output shaft of the reducer through a connecting mechanism consisting of a sleeve, external spline, and internal spline, the stirring shaft can simultaneously make stable reciprocating motion along the axial direction under the guidance of the telescopic mechanism while maintaining rotational shearing. This allows the straw powder base material, bentonite heavy material, bamboo charcoal powder lightweight material, and binder dry powder to form a three-dimensional mixing flow field in the mixing box with radial shearing dispersion and axial pushing exchange, avoiding local material accumulation or unmixed phenomena.

[0018] By rotating an annular plate at the end of the mixing tank and fixing an L-shaped lever that fits against the bottom of the mixing tank on the annular plate, and in conjunction with a swing mechanism consisting of a horizontal groove, a downward sliding rod, a vertical groove, a fixed rod, an upper sliding rod, a mounting plate, a sliding groove, a slider, and a crossbar, the annular plate can be controlled by the downward sliding rod to drive the L-shaped lever to swing back and forth during the rotation of the mixing shaft. This continuously scrapes the inner wall of the mixing tank, dynamically peeling off adhering fiber clumps and hardened adhesive lumps. In addition, the swinging of the L-shaped lever can lift the heavy raw materials at the bottom of the mixing tank upward, forcibly driving the heavy raw materials at the bottom of the mixing tank to circulate upward, breaking up the sediment layer, and effectively solving the problem of unstable cat litter performance in traditional processes. Attached Figure Description

[0019] Figure 1 This is a front view of a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention; Figure 2 This is a top sectional view of a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention; Figure 3 This is a side view of a mixing tank in a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention. Figure 4 This is a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention. Figure 2 Enlarged view of point A in the middle; Figure 5 This is a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention. Figure 2 Enlarged view at point B in the middle; Figure 6 This is a structural diagram of the outer side of the annular plate in a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention; Figure 7 This is a side view of the transmission compartment of a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention. Figure 8 This is a schematic diagram of the end of a sleeve in a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention; Figure 9 This is a structural diagram of both ends of the stirring shaft in a preferred embodiment of a production process for preparing cat litter using agricultural waste according to the present invention.

[0020] In the diagram: 1. Base; 101. Mixing box; 102. Agitator shaft; 103. Drive motor; 104. Reducer; 105. Agitator blades; 2. Telescopic mechanism; 201. Sleeve; 202. Corrugated guide groove; 203. Guide block; 3. Connecting mechanism; 301. Sleeve; 302. External spline; 303. Internal spline; 4. Circular plate; 5. L-shaped lever; 6. Swinging mechanism; 601. Horizontal groove; 602. Lower slide bar; 603. Vertical groove; 604. Fixed bar; 605. Upper slide bar; 606. Mounting plate; 607. Slide groove; 608. Slider; 609. Horizontal bar; 7. Transmission compartment. Detailed Implementation

[0021] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] like Figures 1-9 As shown, this embodiment provides a production process for preparing cat litter using agricultural waste, including a base 1, a mixing box 101 located on the top of the base 1, a stirring shaft 102 rotatably installed between the two ends of the mixing box 101, stirring blades 105 fixed on the side of the stirring shaft 102, a reducer 104 installed at the end of the stirring shaft 102, and a drive motor 103 for driving the stirring shaft 102 to rotate. A transmission chamber 7 is provided on the top of the base 1 and at the end of the mixing box 101. A telescopic mechanism 2 is provided at one end of the stirring shaft 102 near the transmission chamber 7, which is used to drive the stirring shaft 102 to move back and forth along the axial direction. A connecting mechanism 3 is provided between the end of the stirring shaft 102 away from the transmission chamber 7 and the output shaft of the reducer 104 to realize the power transmission between the stirring shaft 102 and the reducer 104. Annular plates 4 are rotatably mounted on both sides of the mixing box 101 near the transmission chamber 7. The stirring shaft 102 passes through the inside of the annular plates 4. L-shaped levers 5 that fit against the inner wall of the mixing box 101 are fixed on the sides of the annular plates 4. The transmission chamber 7 is equipped with a swing mechanism 6, which is linked to the stirring shaft 102 to drive the annular plate 4 to swing back and forth inside the mixing box 101.

[0023] Overall working principle: After the drive motor 103 starts, the output power is reduced and increased in torque by the reducer 104 and then transmitted to the sleeve 301. The sleeve 301 engages with the external spline 302 at the end of the stirring shaft 102 through the internal spline 303, so that the rotational power is smoothly transmitted to the stirring shaft 102, causing the stirring shaft 102 to drive the stirring blades 105 on the side to rotate synchronously, and to radially shear and disperse the material in the mixing box 101.

[0024] Meanwhile, when the stirring shaft 102 rotates, the corrugated guide groove 202 near the transmission chamber 7 forms a sliding fit with the guide block 203 inside the sleeve 201. The guide block 203 generates an axial guiding force on the rotating corrugated guide groove 202, forcing the stirring shaft 102 to make a stable reciprocating motion along its own axis while rotating. This drives the stirring blades 105 to form a three-dimensional stirring trajectory that combines radial shearing and axial pushing, allowing agricultural waste base material, heavy filler, lightweight functional material and binder dry powder to be fully exchanged and mixed in the mixing box 101, avoiding local accumulation or unmixed phenomena.

[0025] Furthermore, when the stirring shaft 102 rotates, it synchronously drives the fixed rod 604 at the end to rotate. The fixed rod 604 drives the slider 608 to make a circular motion through the upper sliding rod 605. The slider 608 slides in the groove 607 of the mounting plate 606, converting the circular motion into the reciprocating linear motion of the mounting plate 606 along the crossbar 609. The mounting plate 606 drives the lower sliding rod 602 to move back and forth in the horizontal groove 601. The lower sliding rod 602, through cooperation with the vertical groove 603 of the annular plate 4, drives the annular plate 4 to swing back and forth around the stirring shaft 102. The annular plate 4 drives the L-shaped lever 5 to swing synchronously, which not only scrapes and cleans the inner wall of the mixing box 101, but also lifts up the heavy materials at the bottom, breaks up the sediment and stratification, and ensures the uniformity of mixing.

[0026] In this embodiment, the connecting mechanism 3 includes a sleeve 301, an external spline 302, and an internal spline 303. The sleeve 301 is rotatably mounted on one end of the mixing box 101 near the reducer 104. The end of the stirring shaft 102 extends into the interior of the sleeve 301. The end of the stirring shaft 102 located inside the sleeve 301 is provided with an external spline 302 in the circumferential direction. The interior of the sleeve 301 is provided with an internal spline 303 that mates with the external spline 302. The end of the sleeve 301 is fixedly connected to the output shaft of the reducer 104.

[0027] Local working principle: After the drive motor 103 starts, the output rotational power is reduced and amplified by the reducer 104, and then directly transmitted to the sleeve 301, which is fixedly connected to the output shaft of the reducer 104, so that the sleeve 301 rotates synchronously with the output shaft of the reducer 104. Since the sleeve 301 has an internal spline 303 and the end of the stirring shaft 102 extending into the sleeve 301 has an external spline 302, the internal spline 303 and the external spline 302 are in a meshing state. The rotational power of the sleeve 301 can be smoothly transmitted to the stirring shaft 102 through the spline engagement, driving the stirring shaft 102 to rotate synchronously, providing the power basis for the radial shearing and stirring of the stirring blades 105. Meanwhile, the meshing structure of the external spline 302 and the internal spline 303 has axial sliding compatibility. When the stirring shaft 102 reciprocates along its own axis under the action of the telescopic mechanism 2, the external spline 302 can slide axially in the internal spline 303 of the sleeve 301, which not only does not interrupt the transmission of rotational power, but also meets the composite motion requirements of the stirring shaft 102's rotation and reciprocation, ensuring the continuity and stability of power transmission.

[0028] In this embodiment, the telescopic mechanism 2 includes a sleeve 201, a corrugated guide groove 202, and a guide block 203. The sleeve 201 is symmetrically fixedly installed at one end of the mixing box 101 near the transmission chamber 7, and the stirring shaft 102 extends from the inside of the sleeve 201 to the inside of the transmission chamber 7. The end of the stirring shaft 102 is provided with a corrugated guide groove 202 along the circumferential direction. The guide block 203 is symmetrically arranged on the inner side of the sleeve 201, and the guide block 203 slides inside the corrugated guide groove 202.

[0029] Local working principle: When the drive motor 103 drives the stirring shaft 102 to rotate through the connecting mechanism 3, the corrugated guide groove 202 at the end of the stirring shaft 102 near the transmission chamber 7 moves in a circular motion synchronously with the stirring shaft 102. Since the sleeve 201 is symmetrically fixed at the end of the mixing box 101 near the transmission chamber 7, the guide block 203 inside the sleeve 201 is fixed in position and always embedded inside the corrugated guide groove 202, forming a fixed constraint structure. The corrugated guide groove 202 has a continuous wave-shaped structure. During its rotation, the guide block 203 and the wave-shaped inner wall of the corrugated guide groove 202 slide relative to each other. The guide block 203 applies an alternating force along the axial direction of the stirring shaft 102 to the corrugated guide groove 202, forcing the stirring shaft 102 to make a stable reciprocating motion along its own axis while rotating. The reciprocating frequency matches the rotation speed of the stirring shaft 102.

[0030] In this embodiment, the swing mechanism 6 includes a horizontal groove 601, a sliding rod 602, a vertical groove 603, and a reciprocating assembly. The horizontal groove 601 is symmetrically opened on both sides of the mixing box 101 near the transmission chamber 7. The annular plate 4 covers the side of the horizontal groove 601. The sliding rod 602 is slidably arranged inside the horizontal groove 601. The side of the annular plate 4 is vertically opened in the radial direction with a vertical groove 603. The vertical groove 603 is perpendicular to the horizontal groove 601. The end of the sliding rod 602 slides inside the vertical groove 603. The end of the sliding rod 602 near the inside of the transmission chamber 7 is provided with a reciprocating assembly for driving the sliding rod 602 to reciprocate inside the horizontal groove 601.

[0031] Local working principle: When the reciprocating component operates, it drives the sliding rod 602 to perform horizontal reciprocating linear motion within the transverse groove 601 at the end of the mixing box 101 near the transmission chamber 7. Since the annular plate 4 is rotatably installed inside the mixing box 101 and covers the side of the transverse groove 601, and the side of the annular plate 4 has a vertical groove 603 radially and perpendicular to the transverse groove 601, the end of the sliding rod 602 is embedded in the vertical groove 603. When the sliding rod 602 reciprocates along the transverse groove 601, its end... The vertical groove 603 slides inside, generating torque around the stirring shaft 102 on the annular plate 4. When the sliding rod 602 moves to one side, it pushes the annular plate 4 to swing in one direction. When the sliding rod 602 moves to the other side, it pulls the annular plate 4 to swing in the opposite direction, ultimately realizing the reciprocating swing of the annular plate 4. When the annular plate 4 swings, it simultaneously drives the L-shaped lever 5 fixed on the side to swing. The L-shaped lever 5 is in contact with the inner wall and bottom of the mixing box 101, which can simultaneously realize the scraping and cleaning of the inner wall and the lifting of heavy materials at the bottom.

[0032] In this embodiment, the reciprocating assembly includes a fixed rod 604, an upper sliding rod 605, a mounting plate 606, a groove 607, and a slider 608. The fixed rod 604 is fixed to the end of the stirring shaft 102. The upper sliding rod 605 is vertically slidably disposed at the end of the fixed rod 604. The mounting plate 606 slides along the length direction of the transmission chamber 7. The outer side of the mounting plate 606 is provided with a groove 607 along the length direction. The slider 608 is slidably disposed inside the groove 607. The slider 608 is fixedly connected to the end of the upper sliding rod 605. The end of the lower sliding rod 602 is fixedly connected to the bottom end of the mounting plate 606.

[0033] Local working principle: When the stirring shaft 102 rotates, the fixed rod 604 at its end rotates synchronously with the stirring shaft 102. An upper sliding rod 605 is vertically slidably mounted on the end of the fixed rod 604. The upper sliding rod 605 rotates together with the fixed rod 604 and can slide along the length of the fixed rod 604. A slider 608 fixed to the end of the upper sliding rod 605 is embedded in a groove 607 on the outer side of the mounting plate 606. The mounting plate 606 is arranged along the length of the transmission chamber 7. When the slider 608 moves with the upper sliding rod 604... When the 05 is in circular motion, the slide 607 creates a radial constraint on the slider 608. The radial component of the circular motion is converted by the slide 607 into a pushing / pulling force along the length of the mounting plate 606, forcing the mounting plate 606 to reciprocate in a straight line along its own length. The bottom end of the mounting plate 606 is fixedly connected to the end of the sliding rod 602. When the mounting plate 606 reciprocates, it directly drives the sliding rod 602 to reciprocate within the transverse groove 601, providing power for the swing of the annular plate 4 of the swing mechanism 6, thus realizing power transmission.

[0034] In this embodiment, a crossbar 609 is fixedly installed inside the transmission chamber 7 along the length direction, and the crossbar 609 passes through the mounting plate 606 and is slidably connected to the mounting plate 606.

[0035] Local working principle: The crossbar 609 acts as a guide and limiter for the mounting plate 606, so that the mounting plate 606 can only move in a straight line along the length of the crossbar 609.

[0036] In this embodiment, the L-shaped lever 5 is made of wear-resistant stainless steel or polyurethane, and the fitting gap between the L-shaped lever 5 and the inner wall and bottom of the mixing box 101 is less than 0.3mm.

[0037] Local working principle: The L-shaped lever 5 is made of wear-resistant stainless steel or polyurethane, and the gap between it and the inner wall and bottom of the mixing box 101 is less than 0.3mm. It can closely fit the inner wall and bottom of the mixing box 101, efficiently scrape off the adhering fiber clumps and adhesive hard blocks, and realize dynamic cleaning.

[0038] In this embodiment, the corrugated guide groove 202 has a continuous wave-shaped structure, and the wave amplitude on the corrugated guide groove 202 is 50-100mm.

[0039] Local working principle: When the stirring shaft 102 rotates, the guide block 203 slides relative to the corrugated inner wall of the corrugated guide groove 202. The guide block 203 applies an alternating force along the axial direction of the stirring shaft 102 to the corrugated guide groove 202, forcing the stirring shaft 102 to reciprocate along its own axial direction.

[0040] In this embodiment, the guide block 203 is cylindrical in shape, and the outer wall of the guide block 203 and the inner side of the corrugated guide groove 202 are both coated with a wear-resistant coating.

[0041] Local working principle: It can reduce frictional loss during relative sliding, extend the service life of components, and ensure that the stirring shaft 102 maintains a stable superposition of reciprocating and rotational motions during long-term operation, thus providing a guarantee for the formation of a three-dimensional mixing flow field.

[0042] like Figures 1-9 As shown in the figure, this embodiment provides a production process for preparing cat litter using agricultural waste as follows: Step 1: Pre-treatment of agricultural waste raw materials. After sorting and removing impurities, straw, rice husks or peanut shells are cut into 5-10cm sections and dried at 50-70℃ until the moisture content is ≤12%. Then, they are crushed and screened to obtain agricultural waste base material with a particle size of 80-100 mesh. Step 2: Layered feeding. First, agricultural waste base material is fed into the mixing tank 101 through the weighing feed hopper at the top of the mixing tank 101. The feeding amount is 60-70% of the total mixing amount. Start the stirring shaft 102 to pre-stir at a speed of 35-40 r / min for 1-2 minutes. Then, heavy filler material, which is bentonite or attapulgite, is added. The feeding amount is 5-10% of the total mixing amount. Continue stirring for 1-2 minutes. Then, light functional material, which is bamboo charcoal powder or activated carbon, is added. The feeding amount is 3-5% of the total mixing amount. Stir for 1 minute. Step 3: Compound mixing and cleaning. Add dry binder powder, which is starch or guar gum, at a rate of 10-15% of the total mixing volume. Adjust the drive motor 103 to increase the speed of the mixing shaft 102 to 45-60 r / min. At the same time, the telescopic mechanism 2 drives the mixing shaft 102 to reciprocate along the axis at a frequency of 10-20 times / min. The swing mechanism 6 drives the L-shaped lever 5 to swing back and forth to scrape and clean the inner wall and bottom of the mixing box 101. Continue mixing for 6-8 minutes. Step 4: Mixing uniformity test. The moisture content and temperature of the mixed materials are collected by the sensors inside the mixing tank 101 to ensure that the moisture content is 18-25% and the temperature is ≤30℃. At the same time, the uniformity of the mixed materials is tested. The mixing uniformity CV value is required to be ≤2%. If it does not meet the standard, the mixing time is extended by 0.5-1 minute. Step 5: Material conveying and granulation. The uniformly mixed material is conveyed to the granulation equipment through the star-shaped discharge valve at the bottom of the mixing box 101. The granulation equipment adopts a screw extruder or a ring die pellet mill. The granulation temperature is controlled at 80-120℃ to obtain cat litter pellets with a diameter of 2-4mm. Step 6: Finished product processing. The granulated cat litter granules are dried at 50-80℃ to a moisture content of 3-5%, cooled to room temperature, and then screened to remove unqualified granules. After that, they are subjected to ultraviolet-ozone composite sterilization treatment for 5-8 minutes, and finally packaged to obtain environmentally friendly cat litter made from agricultural waste.

[0043] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A production process for preparing cat litter using agricultural waste, characterized by, Comprising the following steps: Step 1: agricultural waste raw material pretreatment, after removing impurities by sorting, the straw, rice husk or peanut shell is cut into 5-10 cm sections, dried at 50-70℃ to a moisture content of ≤12%, then crushed and sieved to obtain an agricultural waste base material with a particle size of 80-100 mesh; Step 2: layered feeding, through the weighing feed bin at the top of the mixing box (101), first feed the agricultural waste base material into the mixing box (101), the feeding amount is 60-70% of the total mixing amount, start the stirring shaft (102) at a speed of 35-40 r / min for 1-2 minutes of pre-stirring, then feed the heavy filler, which is bentonite or attapulgite, the feeding amount is 5-10% of the total mixing amount, continue stirring for 1-2 minutes, then feed the light functional material, which is bamboo charcoal powder or activated carbon, the feeding amount is 3-5% of the total mixing amount, stir for 1 minute; Step 3: composite stirring and cleaning, feed the dry powder of the binder, which is starch or guar gum, the feeding amount is 10-15% of the total mixing amount, adjust the drive motor (103) to increase the stirring shaft (102) speed to 45-60 r / min, at the same time, drive the stirring shaft (102) to reciprocate along the axial direction at a frequency of 10-20 times per minute through the telescopic mechanism (2), and drive the L-shaped stirring rod (5) to reciprocate through the swing mechanism (6), to scrape and clean the inner wall and bottom of the mixing box (101), continue stirring for 6-8 minutes; Step 4: uniformity detection, through the sensor inside the mixing box (101), collect the moisture content and temperature of the mixed material, ensure the moisture content is 18-25% and the temperature is ≤30℃, at the same time, take samples to detect the uniformity of the mixed material, the uniformity CV value should be ≤2%, if not up to standard, extend the stirring time by 0.5-1 minute; Step 5: material conveying and granulation, through the star-shaped discharge valve at the bottom of the mixing box (101), convey the uniformly mixed material to the granulation equipment, the granulation equipment uses a screw extruder or a ring die granulator, the granulation temperature is controlled at 80-120℃, to obtain cat litter particles with a diameter of 2-4mm; Step 6: finished product processing, after granulation, the cat litter particles are dried at 50-80℃ to a moisture content of 3-5%, cooled to room temperature, sieved to remove unqualified particles, then treated with ultraviolet-ozone composite sterilization for 5-8 minutes, finally packaged, to obtain environmentally friendly cat litter prepared from agricultural waste.

2. The production process for preparing cat litter using agricultural waste according to claim 1, characterized in that: The production equipment for the production process comprises a machine base (1), a mixing box (101) located at the top of the machine base (1), a stirring shaft (102) rotatably installed between the two ends of the mixing box (101), stirring blades (105) fixed on the side of the stirring shaft (102), a speed reducer (104) installed at the end of the stirring shaft (102), and a drive motor (103) for driving the stirring shaft (102) to rotate; Its characterized in that: the top of the base (1) and the end of the mixing box (101) are provided with a transmission bin (7), one end of the stirring shaft (102) close to the transmission bin (7) is provided with a telescopic mechanism (2) for driving the stirring shaft (102) to move back and forth along the axial direction; The other end of the stirring shaft (102) away from the transmission bin (7) is provided with a connecting mechanism (3) between the output shaft of the speed reducer (104) for realizing the power transmission of the stirring shaft (102) and the speed reducer (104); The two sides of the mixing box (101) close to the transmission bin (7) are rotatably installed with annular plates (4), the stirring shaft (102) passes through the inside of the annular plate (4), and the side edges of the annular plate (4) are fixedly provided with L-shaped push rods (5) abutting the inner wall of the mixing box (101); The inside of the transmission bin (7) is provided with a swing mechanism (6) linked between the swing mechanism (6) and the stirring shaft (102) for driving the annular plate (4) to swing back and forth in the mixing box (101).

3. The process for producing cat litter from agricultural waste according to claim 2, wherein: The connecting mechanism (3) comprises a sleeve (301), an outer spline (302) and an inner spline (303), the sleeve (301) is rotatably installed at one end of the mixing box (101) close to the speed reducer (104), the end of the stirring shaft (102) extends into the inside of the sleeve (301), the end of the stirring shaft (102) located in the inside of the sleeve (301) is provided with the outer spline (302) in the circumferential direction, the inside of the sleeve (301) is provided with the inner spline (303) matched with the outer spline (302), and the end of the sleeve (301) is fixedly connected with the output shaft of the speed reducer (104).

4. The process for producing cat litter from agricultural waste according to claim 3, wherein: The telescopic mechanism (2) comprises a sleeve pipe (201), a corrugated guide groove (202) and a guide block (203), the sleeve pipe (201) is fixedly installed at one end of the mixing box (101) close to the transmission bin (7) in a symmetrical mode, the stirring shaft (102) passes out from the inside of the sleeve pipe (201) to the inside of the transmission bin (7), the end of the stirring shaft (102) is provided with the corrugated guide groove (202) in the circumferential direction, the inside of the sleeve pipe (201) is symmetrically provided with the guide block (203), and the guide block (203) slides in the inside of the corrugated guide groove (202).

5. The process for producing cat litter from agricultural waste as claimed in claim 2, wherein: The swing mechanism (6) comprises a horizontal groove (601), a lower sliding rod (602), a vertical groove (603) and a reciprocating assembly, the horizontal grooves (601) are symmetrically formed at the two sides of one end of the mixing box (101) close to the transmission bin (7), the annular plate (4) covers the side edges of the horizontal grooves (601), the lower sliding rods (602) are slidably arranged in the inside of the horizontal grooves (601), the side edges of the annular plate (4) are vertically provided with the vertical grooves (603) in the radial direction, the vertical grooves (603) are perpendicular to the horizontal grooves (601), the ends of the lower sliding rods (602) slide in the inside of the vertical grooves (603), and one end of the lower sliding rod (602) close to the inside of the transmission bin (7) is provided with the reciprocating assembly for driving the lower sliding rod (602) to move back and forth in the inside of the horizontal groove (601).

6. The process for producing cat litter from agricultural waste as claimed in claim 5 wherein: The reciprocating assembly comprises a fixed rod (604), an upper sliding rod (605), a mounting plate (606), a sliding groove (607) and a sliding block (608), the fixed rod (604) is fixed at the end of the stirring shaft (102), the end of the fixed rod (604) is vertically and slidingly provided with the upper sliding rod (605), the mounting plate (606) slides along the length direction of the transmission bin (7), the outer side of the mounting plate (606) is provided with the sliding groove (607) along the length direction, the sliding groove (607) is internally slidingly provided with the sliding block (608), the sliding block (608) is fixedly connected with the end of the upper sliding rod (605), and the end of the lower sliding rod (602) is fixedly connected with the bottom end of the mounting plate (606).

7. The process for producing cat litter from agricultural waste according to claim 6, wherein: The transmission bin (7) is internally fixedly provided with a cross rod (609) along the length direction, the cross rod (609) penetrates through the mounting plate (606) and is slidingly connected with the mounting plate (606).

8. The process for producing cat litter from agricultural waste as claimed in claim 2 wherein: The material of the L-shaped pushing rod (5) is wear-resistant stainless steel or polyurethane, and the fitting gap between the L-shaped pushing rod (5) and the inner wall and the inner bottom of the mixing box (101) is less than 0.3 mm.

9. The process for producing cat litter from agricultural waste as claimed in claim 4 wherein: The corrugated guide groove (202) is in a continuous wave shape structure, and the wave amplitude of the corrugated guide groove (202) is 50-100 mm.

10. The process for producing cat litter from agricultural waste as claimed in claim 4 wherein: The guide block (203) is in a cylindrical shape, and the outer wall of the guide block (203) and the inner side of the corrugated guide groove (202) are both coated with a wear-resistant coating.

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