Drum screen urine spraying device for compound fertilizer processing

Abstract

The invention belongs to the technical field of compound fertilizer processing, and discloses a drum screen urine spraying device for compound fertilizer processing, which comprises a processing shell, a support frame is fixed at the bottom end of the processing shell, a urine box is arranged outside a raw material box, an extension box is fixed outside the raw material box, and a communication mechanism is mounted inside the urine box. Through cooperation of a servo motor, a first connecting rod, an extension rod and other structures, the device can start the servo motor to drive the first connecting rod to rotate, then the extension rod, the inner screen drum and the outer screen drum are driven to rotate, and raw materials located in the inner screen drum fall into the outer screen drum after being screened; at the moment, redundant powder attached to the surface of the finished product material is filtered through the outer screen drum and discharged through the powder outlet, and the finished product material is discharged through the finished product outlet, so that the purpose that the finished product and the redundant powder are separately discharged after the material and the urine are conveniently mixed by the device is achieved.

Description

Technical Field

[0001] This invention belongs to the field of compound fertilizer processing technology, specifically a drum screen spraying urine device for compound fertilizer processing. Background Technology

[0002] Compound fertilizer refers to chemical fertilizer containing two or more nutrients. Compound fertilizer has the advantages of high nutrient content, few by-products and good physical properties. It plays a very important role in balanced fertilization, improving fertilizer utilization, and promoting high and stable crop yields. Compound fertilizer usually needs to be granulated into granular fertilizer that is easy to use. Granulation of compound fertilizer has the advantages of improving the physical properties of the product, increasing fertilization efficiency, simplifying fertilization operations and slowing down the nutrient dissolution rate, thereby reducing nutrient loss. When screening compound fertilizer, additional molten urea wrapping equipment is required to supplement nitrogen, and the processing process is relatively long.

[0003] CN222625288U discloses a multi-stage screening device for compound fertilizer processing, including a screen box body, a vibration mechanism, and a concave frame. The vibration mechanism is located at the bottom of the screen box body, and the right end of the screen box body is located inside the concave frame. The two vertical ends of the concave frame are located on the front and rear sides of the screen box body, respectively. A U-shaped frame is provided on the top of the concave frame, and two staggered discharge hoppers are provided on the inner side of the concave frame. A connecting pipe connects the top of the two discharge hoppers to the top of the concave frame. A reciprocating mechanism is provided on the concave frame to drive the discharge hoppers to move back and forth. A material dispersing mechanism is provided on the discharge hoppers to extend into the interior of the screen box body. The screen box body includes a screening box, a discharge port, a first screen, and a second screen. This multi-stage screening device for compound fertilizer processing can uniformly discharge and disperse materials to maximize and efficiently utilize the screening area, thereby improving the screening efficiency of the equipment.

[0004] However, the device cannot add urine to supplement nitrogen to the material during screening. It is necessary to enable the device to supplement nitrogen to the material during screening and mixing to shorten the compound fertilizer preparation process. Furthermore, the material should be shaken to increase the material discharge speed and thus shorten the preparation time. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a rotary screen spraying device for compound fertilizer processing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drum screen spraying urine device for compound fertilizer processing, comprising a processing shell, a support frame fixed to the bottom end of the processing shell, an extension plate fixed to the outside of the processing shell, a screening mechanism provided at the top end of the extension plate, a raw material box fixed to the outside of the processing shell, a urine box provided to the outside of the raw material box, an extension box fixed to the outside of the raw material box, a communication mechanism installed inside the urine box, and a limit mechanism provided at one end of the communication mechanism;

[0007] The screening mechanism includes a servo motor, a first connecting rod, and an extension rod. The servo motor is fixed to the top of the extension plate, the rotating end of the servo motor is fixed to the first connecting rod, and the extension rod is fixed to the outside of the first connecting rod.

[0008] The communication mechanism includes a liquid outlet, a connecting frame, and a third connecting rod. The liquid outlet is installed at one end inside the urine box. The connecting frame is fixed inside the liquid outlet, and the third connecting rod is slidably connected inside the connecting frame.

[0009] Preferably, an inner screen cylinder is fixed to the outside of the extension rod, an outer screen cylinder is fixed to the outside of the first connecting rod, an engaging belt is sleeved on the outside of the first connecting rod, a second connecting rod is sleeved inside the engaging belt, a scraper is fixed to the outside of the second connecting rod, and an eccentric wheel is fixed to the outside of the second connecting rod.

[0010] Preferably, the inner screen cylinder has several sets of screening holes on its surface, the outer screen cylinder has several sets of screening holes on its surface, several sets of scrapers are provided, the scrapers are arranged in an array, and the eccentric wheel is located at the bottom of the raw material box.

[0011] Preferably, a liquid-blocking valve is fixed to the outside of the third link, a first return spring is sleeved on the outside of the third link, a stop rod is slidably connected inside the extension box, a toggle block is fixed to the outside of the stop rod, and a second return spring is sleeved on the outside of the stop rod.

[0012] Preferably, there are two sets of liquid outlets, which are symmetrically distributed about the central axis of the urine box. The outer diameter of the liquid-blocking valve is larger than the inner diameter of the liquid outlet. The first return spring is used to squeeze the third link and the liquid-blocking valve and keep them moving inward.

[0013] Preferably, one end of the extension box has an interface that is connected to the liquid outlet, and the second return spring is used to squeeze the lever and the stop rod and keep them moving outward.

[0014] Preferably, the limiting mechanism includes a mounting base, a first connecting rod, and a first limiting block. The mounting base is fixed to the outside of the lever block. The first connecting rod is fixed to the outside of the mounting base. The first limiting block is fixed to the outside of the first connecting rod. A second limiting block is sleeved on the outside of the first connecting rod. A limiting seat is fixed to the outside of the extension box. The second connecting rod is slidably connected to the inside of the limiting seat. A third return spring is sleeved on the outside of the second connecting rod. A third limiting block is fixed to the outside of the second connecting rod.

[0015] Preferably, the mounting base has two sets of symmetrically distributed about the central axis of the lever block, the outer diameter of the first limiting block is smaller than the outer diameter of the second limiting block, two sets of the second connecting rod are provided, the second connecting rod is symmetrically distributed about the limiting base, and the third return spring is used to squeeze the second connecting rod and the third limiting block and keep them moving inward.

[0016] Preferably, the bottom end of the raw material box is connected to a feeding pipe, the bottom end of the extension box is connected to a urine feeding pipe, the bottom end of the processing shell is provided with a powder outlet, a baffle is fixed inside the processing shell, and one end of the baffle is connected to a finished product outlet.

[0017] Preferably, the top of the urine box is fixed with a mounting base, the powder outlet is provided in two sets, the powder outlet is symmetrically distributed about the central axis of the processing shell, and the extension box is provided in two sets, which are symmetrically distributed about the central axis of the raw material box.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention, through the coordinated arrangement of a servo motor, a first connecting rod, and an extension rod, enables the device to activate the servo motor to drive the first connecting rod to rotate, which in turn drives the extension rod, the inner screen cylinder, and the outer screen cylinder to rotate. This allows the raw material located inside the inner screen cylinder to be screened and fall into the outer screen cylinder. At this time, excess powder adhering to the surface of the finished material is filtered through the outer screen cylinder and discharged through the powder outlet, while the finished material is discharged through the finished product outlet. This achieves the purpose of facilitating the device to mix the material and urine, and then separately discharge the finished product and excess powder.

[0020] This invention, through the coordinated arrangement of a liquid outlet, connecting frame, and third link, enables the device to connect the urine box and extension box by pushing a lever and a stop rod, causing the stop rod to press against the third link and the liquid-blocking valve. This allows urine from the urine box to enter the extension box and be added into the device through the urine inlet tube. When disassembly is required, a second return spring resets the lever, and the first return spring pulls back the third link and the liquid-blocking valve using its restoring force, preventing urine leakage. The components can then be removed for cleaning. This allows the device to quickly switch between a connected or disconnected state between the urine box and the extension box.

[0021] This invention, through the cooperation of structures such as a mounting base, a first connecting rod, and a first limiting block, enables the device to press the lever, causing the first limiting block to squeeze the third limiting block. At this time, the third limiting block retracts inward. After the first limiting block passes, a third return spring resets the third limiting block, thereby limiting the first limiting block through the third limiting block. This completes the limiting of the lever, ensuring that the urine box and the connecting mechanism are always in a connected state. When it is necessary to close the connection or remove the urine box, removal can be quickly completed by pressing the lever. This achieves the purpose of making it easy for the device to fix the position of the lever to maintain the urine connection state and to set the urine box to a quick-release state. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the screening mechanism of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged cross-sectional view of point A in the middle section;

[0026] Figure 5 This is a schematic diagram of the finished product export structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the raw material box and urine box structure of the present invention;

[0028] Figure 7 This is a top view of the raw material box and urine box of the present invention;

[0029] Figure 8 This is a schematic diagram of the connecting mechanism structure of the present invention.

[0030] Figure 9 For the present invention Figure 8 Enlarged cross-sectional view of section B in the middle.

[0031] In the diagram: 1. Machining shell; 2. Support frame; 3. Extension plate; 4. Screening mechanism; 401. Servo motor; 402. First connecting rod; 403. Extension rod; 404. Inner screen cylinder; 405. Outer screen cylinder; 406. Meshing belt; 407. Second connecting rod; 408. Scraper; 409. Eccentric wheel; 5. Raw material box; 6. Urine box; 7. Connecting mechanism; 701. Liquid outlet; 702. Connecting frame; 703. Third connecting rod; 704. Liquid blocking valve; 705. 706. First return spring; 707. Abutment rod; 708. Toggle block; 709. Second return spring; 8000. Limiting mechanism; 801. Mounting base; 802. First connecting rod; 803. First limiting block; 804. Second limiting block; 805. Limiting seat; 806. Second connecting rod; 807. Third return spring; 808. Third limiting block; 9. Feeding pipe; 10. Urine feeding pipe; 11. Powder outlet; 12. Baffle; 13. Finished product outlet; 14. Extension box. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 9 As shown, the present invention provides a rotary screen spraying urine device for compound fertilizer processing, including a processing shell 1, a support frame 2 fixed to the bottom of the processing shell 1, an extension plate 3 fixed to the outside of the processing shell 1, a screening mechanism 4 provided at the top of the extension plate 3, a raw material box 5 fixed to the outside of the processing shell 1, a urine box 6 provided to the outside of the raw material box 5, an extension box 14 fixed to the outside of the raw material box 5, a connecting mechanism 7 installed inside the urine box 6, a limiting mechanism 8 provided at one end of the connecting mechanism 7, a feeding pipe 9 connected to the bottom of the raw material box 5, a urine inlet pipe 10 connected to the bottom of the extension box 14, a powder outlet 11 provided at the bottom of the processing shell 1, a baffle 12 fixed inside the processing shell 1, a finished product outlet 13 connected at one end of the baffle 12, a mounting base 801 fixed to the top of the urine box 6, two sets of powder outlets 11 provided, the powder outlets 11 being symmetrically distributed about the central axis of the processing shell 1, and two sets of extension boxes 14 being symmetrically distributed about the central axis of the raw material box 5.

[0034] The above scheme involves adding materials into the raw material box 5 and urine into the urine box 6. The urine box 6 and the extension box 14 are then connected. The materials and urine are then transported to the inner screen cylinder 404 for mixing and screening via the feeding pipe 9 and the urine inlet pipe 10. The open design of the raw material box 5 and the urine box 6 facilitates the addition of materials and urine. Since urine is prone to bacterial growth and requires cleaning after long-term use, the urine box 6 is completely disassembled to facilitate cleaning by the user, ensuring the quality of compound fertilizer processing.

[0035] like Figures 1 to 6 As shown, the screening mechanism 4 includes a servo motor 401, a first connecting rod 402, and an extension rod 403. The servo motor 401 is fixed to the top of the extension plate 3. The rotating end of the servo motor 401 is fixed to the first connecting rod 402. The extension rod 403 is fixed to the outside of the first connecting rod 402. The inner screen cylinder 404 is fixed to the outside of the extension rod 403. The outer screen cylinder 405 is fixed to the outside of the first connecting rod 402. A meshing belt 406 is sleeved on the outside of the first connecting rod 402. A second connecting rod 407 is sleeved inside the meshing belt 406. A scraper 408 is fixed to the outside of the second connecting rod 407. An eccentric wheel 409 is fixed to the outside of the second connecting rod 407. Several sets of screening holes are opened on the surface of the inner screen cylinder 404. Several sets of screening holes are opened on the surface of the outer screen cylinder 405. Several sets of scrapers 408 are arranged in an array. The eccentric wheel 409 is located at the bottom of the raw material box 5.

[0036] The above scheme is adopted as follows: by starting the servo motor 401, the first connecting rod 402 is rotated, which in turn drives the extension rod 403, the inner screen cylinder 404 and the outer screen cylinder 405 to rotate. The raw material located inside the inner screen cylinder 404 is screened and falls into the outer screen cylinder 405. At this time, the excess powder adhering to the surface of the finished material is filtered by the outer screen cylinder 405 and discharged through the powder outlet 11. The finished material is discharged through the finished product outlet 13. While the outer screen cylinder 405 is rotating, the extension rod 403 drives the second connecting rod 407 to rotate through the meshing belt 406. The second connecting rod 407 drives the scraper 408 and the eccentric wheel 409 to rotate. When the scraper 408 rotates, it can scrape off the powder adhering to the outer wall of the outer screen cylinder 405. When the eccentric wheel 409 rotates, it can continuously contact and disengage from the bottom of the raw material box 5, causing the raw material box 5 to vibrate, thereby improving the efficiency of material discharge.

[0037] like Figures 1 to 9As shown, the connecting mechanism 7 includes a liquid outlet 701, a connecting frame 702, and a third connecting rod 703. The liquid outlet 701 is installed at one end inside the urine container 6. The connecting frame 702 is fixed inside the liquid outlet 701. The third connecting rod 703 is slidably connected inside the connecting frame 702. A liquid-blocking valve 704 is fixed outside the third connecting rod 703. A first return spring 705 is sleeved on the outside of the third connecting rod 703. There are two sets of liquid outlets 701. The liquid outlets 701 are symmetrically distributed about the central axis of the urine container 6. The outer diameter of the liquid-blocking valve 704 is larger than the inner diameter of the liquid outlet 701. The first return spring 705 is used to squeeze the third connecting rod 703 and the liquid-blocking valve 704 and keep them moving inward.

[0038] like Figures 1 to 9 As shown, a stop rod 706 is slidably connected inside the extension box 14, a lever 707 is fixed outside the stop rod 706, and a second return spring 708 is sleeved on the outside of the stop rod 706. One end of the extension box 14 has an interface that is connected to the liquid outlet 701. The second return spring 708 is used to squeeze the lever 707 and the stop rod 706 and keep them moving outward.

[0039] The above solution involves pushing the urine box 6 upwards onto the raw material box 5 and installing it via parts such as the mounting base 801. Then, pushing the lever 707 and the abutment rod 706 causes the abutment rod 706 to press against the third connecting rod 703 and the liquid-blocking valve 704, preventing the liquid-blocking valve 704 from blocking the outlet 701. This connects the urine box 6 and the extension box 14, allowing urine from the urine box 6 to enter the extension box 14 and be added into the device through the urine inlet pipe 10. When disassembly is required, the second return spring 708 resets the lever 707, relieving the third connecting rod 703 of its pressure. The first return spring 705 then pulls back the third connecting rod 703 and the liquid-blocking valve 704 using its restoring force, re-blocking the outlet 701 to prevent urine leakage. The device is then removed for cleaning.

[0040] like Figures 1 to 9As shown, the limiting mechanism 8 includes a mounting base 801, a first connecting rod 802, and a first limiting block 803. The mounting base 801 is fixed to the outside of the lever 707. The first connecting rod 802 is fixed to the outside of the mounting base 801. The first limiting block 803 is fixed to the outside of the first connecting rod 802. A second limiting block 804 is sleeved on the outside of the first connecting rod 802. A limiting seat 805 is fixed to the outside of the extension box 14. A second connecting rod 806 is slidably connected to the inside of the limiting seat 805. The second connecting rod 806 is slidably connected to the outside of the limiting seat 805. The part is equipped with a third return spring 807, and a third limiting block 808 is fixed to the outside of the second connecting rod 806. The mounting base 801 is provided with two sets of symmetrically distributed about the central axis of the lever block 707. The outer diameter of the first limiting block 803 is smaller than the outer diameter of the second limiting block 804. Two sets of second connecting rods 806 are provided, and the second connecting rods 806 are symmetrically distributed about the limiting base 805. The third return spring 807 is used to press the second connecting rod 806 and the third limiting block 808 and keep them moving inward.

[0041] Using the above scheme: By pressing the lever 707, the first limiting block 803 squeezes the third limiting block 808. At this time, the third limiting block 808 retracts inward. After the first limiting block 803 passes, the third return spring 807 resets the third limiting block 808, thereby limiting the first limiting block 803 through the third limiting block 808, thus completing the limitation of the lever 707, so that the urine box 6 and the connecting mechanism 7 are always in a connected state. When it is necessary to close the connected state or remove the urine box 6, the lever 707 is pressed again, causing the second limiting block 804 to squeeze the third limiting block 808. The third limiting block 808 retracts inward. After the second limiting block 804 passes, the third return spring 807 resets the third limiting block 808. At this time, the third limiting block 808 lifts the second limiting block 804, causing the second limiting block 804 and the first limiting block 803 to fit together. When released, the second return spring 708 pushes the pusher block 707 back, thereby separating the mounting base 801 and the limiting base 805. At this time, the urine box 6 and the extension box 14 are not in a connected state. Press the urine box 6 upward as a whole, and repeat the same process as above, to remove the urine box 6 for inspection or cleaning.

[0042] The working principle and usage process of this invention are as follows: Material is added to the raw material box 5, and urine is added to the urine box 6. The urine box 6 and the extension box 14 are then connected. The material and urine are then transported to the inner screen cylinder 404 for mixing and screening via the feeding pipe 9 and the urine inlet pipe 10. The raw material box 5 and urine box 6 are open to facilitate the addition of material and urine. Since urine is prone to bacterial growth and requires cleaning after long-term use, the urine box 6 is completely removed for easy cleaning by the user, ensuring the quality of compound fertilizer processing. After the urine box 6 is pushed upwards towards the raw material box 5 and installed via the mounting base 801 and other parts, the pusher block 707 and the abutment rod 706 are pushed, causing the abutment rod 706 to... 06. Squeeze the third connecting rod 703 and the liquid-blocking valve 704, so that the liquid-blocking valve 704 no longer blocks the outlet 701, thereby connecting the urine box 6 and the extension box 14, allowing the urine inside the urine box 6 to enter the extension box 14 and be added into the device through the urine inlet pipe 10. When disassembly is required, the second return spring 708 resets the lever 707, and the third connecting rod 703 is no longer subjected to squeezing force. At this time, the first return spring 705 pulls back the third connecting rod 703 and the liquid-blocking valve 704 through its own restoring force, re-blocking the outlet 701 to prevent urine from flowing out, and then removes it for cleaning. Press the lever 707, so that the first limit block 803 squeezes the third limit block 808. At this time, the third limit block 808 retracts inward. After the first limiting block 803 passes, the third return spring 807 resets the third limiting block 808, thereby limiting the first limiting block 803 through the third limiting block 808, thus completing the limiting of the toggle block 707, ensuring that the urine box 6 and the connecting mechanism 7 are always in a connected state. When it is necessary to close the connection or remove the urine box 6, continue to press the toggle block 707, causing the second limiting block 804 to squeeze the third limiting block 808. At this time, the third limiting block 808 retracts inward. After the second limiting block 804 passes, the third return spring 807 resets the third limiting block 808. At this time, the third limiting block 808 lifts the second limiting block 804, causing the second limiting block 804 and the first limiting block 803 to fit together. Then release the spring, and the second limiting block 808 will reset. Spring 708 pushes the lever 707 back, thus separating the mounting base 801 and the limiting base 805. At this time, the urine box 6 and the extension box 14 are not in a connected state. Then, press the urine box 6 upward as a whole, and repeat the process above to remove the urine box 6 for inspection or cleaning. By starting the servo motor 401, the first connecting rod 402 is rotated, which in turn drives the extension rod 403, the inner screen cylinder 404, and the outer screen cylinder 405 to rotate. This causes the raw material inside the inner screen cylinder 404 to fall into the outer screen cylinder 405 after screening. At this time, excess powder adhering to the surface of the finished material is filtered through the outer screen cylinder 405 and discharged through the powder outlet 11, while the finished material is discharged through the finished product outlet 13. While the outer screen cylinder 405 is rotating,The extension rod 403 drives the second connecting rod 407 to rotate via the meshing belt 406. This, in turn, causes the second connecting rod 407 to rotate the scraper 408 and the eccentric wheel 409. When the scraper 408 rotates, it scrapes off the powder adhering to the outer wall of the outer screen cylinder 405. Meanwhile, the eccentric wheel 409 continuously contacts and disengages from the bottom of the raw material box 5, causing the raw material box 5 to vibrate, thereby improving the efficiency of material feeding.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary screen spraying device for compound fertilizer processing, comprising a processing housing (1), characterized in that: A support frame (2) is fixed at the bottom of the processing housing (1), an extension plate (3) is fixed on the outside of the processing housing (1), a screening mechanism (4) is provided at the top of the extension plate (3), a raw material box (5) is fixed on the outside of the processing housing (1), a urine box (6) is provided on the outside of the raw material box (5), an extension box (14) is fixed on the outside of the raw material box (5), a communication mechanism (7) is installed inside the urine box (6), and a limit mechanism (8) is provided at one end of the communication mechanism (7). The screening mechanism (4) includes a servo motor (401), a first connecting rod (402) and an extension rod (403). The servo motor (401) is fixed to the top of the extension plate (3). The first connecting rod (402) is fixed to the rotating end of the servo motor (401). The extension rod (403) is fixed to the outside of the first connecting rod (402). The communication mechanism (7) includes a liquid outlet (701), a connecting frame (702) and a third connecting rod (703). The liquid outlet (701) is installed at one end inside the urine box (6). The connecting frame (702) is fixed inside the liquid outlet (701), and the third connecting rod (703) is slidably connected inside the connecting frame (702).

2. The drum screen spraying device for compound fertilizer processing according to claim 1, characterized in that: An inner screen cylinder (404) is fixed to the outside of the extension rod (403), an outer screen cylinder (405) is fixed to the outside of the first connecting rod (402), an engagement belt (406) is sleeved on the outside of the first connecting rod (402), a second connecting rod (407) is sleeved inside the engagement belt (406), a scraper (408) is fixed to the outside of the second connecting rod (407), and an eccentric wheel (409) is fixed to the outside of the second connecting rod (407).

3. The drum screen spraying device for compound fertilizer processing according to claim 2, characterized in that: The inner screen cylinder (404) has several sets of screening holes on its surface, the outer screen cylinder (405) has several sets of screening holes on its surface, the scraper (408) has several sets and is arranged in an array, and the eccentric wheel (409) is located at the bottom of the raw material box (5).

4. The drum screen spraying device for compound fertilizer processing according to claim 1, characterized in that: A liquid-blocking valve (704) is fixed to the outside of the third link (703), a first return spring (705) is sleeved on the outside of the third link (703), a stop rod (706) is slidably connected inside the extension box (14), a toggle block (707) is fixed to the outside of the stop rod (706), and a second return spring (708) is sleeved on the outside of the stop rod (706).

5. The rotary screen spraying device for compound fertilizer processing according to claim 4, characterized in that: Two sets of liquid outlets (701) are provided. The liquid outlets (701) are symmetrically distributed about the central axis of the urine box (6). The outer diameter of the liquid blocking valve (704) is larger than the inner diameter of the liquid outlet (701). The first return spring (705) is used to squeeze the third connecting rod (703) and the liquid blocking valve (704) and keep them moving inward.

6. The drum screen urine spraying device for compound fertilizer processing according to claim 4, characterized in that: One end of the extension box (14) is provided with an interface, which is connected to the liquid outlet (701). The second return spring (708) is used to squeeze the push block (707) and the push rod (706) and keep them moving outward.

7. The rotary screen spraying device for compound fertilizer processing according to claim 1, characterized in that: The limiting mechanism (8) includes a mounting base (801), a first connecting rod (802), and a first limiting block (803). The mounting base (801) is fixed to the outside of the lever (707). The first connecting rod (802) is fixed to the outside of the mounting base (801). The first limiting block (803) is fixed to the outside of the first connecting rod (802). A second limiting block (804) is sleeved on the outside of the first connecting rod (802). A limiting seat (805) is fixed to the outside of the extension box (14). A second connecting rod (806) is slidably connected inside the limiting seat (805). A third return spring (807) is sleeved on the outside of the second connecting rod (806). A third limiting block (808) is fixed to the outside of the second connecting rod (806).

8. The rotary screen spraying device for compound fertilizer processing according to claim 7, characterized in that: The mounting base (801) is provided with two sets of symmetrically distributed about the central axis of the lever (707). The outer diameter of the first limiting block (803) is smaller than the outer diameter of the second limiting block (804). Two sets of the second connecting rod (806) are provided. The second connecting rod (806) is symmetrically distributed about the limiting base (805). The third return spring (807) is used to press the second connecting rod (806) and the third limiting block (808) and keep them moving inward.

9. The drum screen spraying device for compound fertilizer processing according to claim 1, characterized in that: The bottom end of the raw material box (5) is connected to the feeding pipe (9), the bottom end of the extension box (14) is connected to the urine feeding pipe (10), the bottom end of the processing shell (1) is provided with a powder outlet (11), a baffle (12) is fixed inside the processing shell (1), and one end of the baffle (12) is connected to the finished product outlet (13).

10. The drum screen spraying device for compound fertilizer processing according to claim 9, characterized in that: The top of the urine box (6) is fixed with a mounting base (801), and two sets of powder outlets (11) are provided. The powder outlets (11) are symmetrically distributed about the central axis of the processing shell (1). The extension box (14) is provided with two sets of materials box (5) symmetrically distributed about the central axis of the material box (5).

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