Compost cavity stirring kettle and biodegradable closestool stirring and discharging structure

Abstract

The utility model discloses a compost cavity stirring kettle and a biodegradable closestool stirring and discharging structure, and a stirring kettle cutter of the compost cavity stirring kettle comprises a double-screw blade and blade supports arranged at the two ends of the double-screw blade. The stirring kettle cutters are arranged in a spiral line mode, when the compost cavity stirring kettle rotates, a culture medium is driven to be overturned and stirred, meanwhile, the culture medium is conveyed from one end to the other end, then the compost cavity stirring kettle is continuously switched in a positive and negative rotation mode, bidirectional back-and-forth conveying of the culture medium is achieved, and the stirring efficiency of the culture medium is greatly improved; moreover, the double-spiral blade is designed to be composed of the first spiral section and the second spiral section which are opposite in spiral direction, so that a culture medium at the end part of the biodegradation container can be effectively stirred, the culture medium at the end part can be pushed to move towards the other end, the culture medium at the end part is prevented from being solidified, the biodegradation speed is further increased, and the service life of the biodegradation container is prolonged. And toxic and harmful gases generated by anaerobic reaction are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of toilet parts, in particular to a compost chamber stirring kettle and a stirring and discharging structure of a biodegradable toilet. Background Technique

[0002] The biodegradable toilet is a new type of toilet that has emerged in recent years and can degrade human excrement through microorganisms. It is especially suitable for use in some indoor environments where it is inconvenient to connect water or discharge dirt, such as in RVs, yachts, and for the care of the elderly with limited mobility in nursing homes.

[0003] Please refer to Chinese patents such as the publication numbers CN220735262U and CN219374488U. Existing biodegradable toilets only have a compost chamber for carrying out biodegradation reactions, and stirring is used to accelerate the biodegradation reaction of the culture medium on feces. However, the structure of the existing stirring kettle is extremely simple, and its stirring ability and efficiency are not good. It not only fails to fully mix the culture medium, resulting in a slow biodegradation rate, but also when rotating forward and / or backward, usually only one direction can smoothly stir the culture medium, and at the same time, it is easy for the culture medium to pile up at one end of the biodegradation container. Over time, it is very easy to have problems with stirring jamming. Moreover, there is always a certain amount of culture medium at the end of the biodegradation container that cannot be stirred, which not only affects the biodegradation rate but also easily causes anaerobic reactions that produce harmful gases.

[0004] Solving the above problems has become an urgent task. Content of the Utility Model

[0005] To solve the technical problem that the existing stirring kettle has poor stirring ability and efficiency due to structural design defects, the utility model provides a compost chamber stirring kettle and a stirring and discharging structure of a biodegradable toilet.

[0006] The technical solution is as follows:

[0007] The first aspect of the present application relates to a compost chamber stirring kettle, which includes a stirring kettle rotating shaft and stirring kettle cutters arranged in a spiral extension on the outer peripheral surface of the stirring kettle rotating shaft. The stirring kettle cutters each include double spiral blades and blade brackets arranged at both ends of the double spiral blades. The two ends of the double spiral blades are respectively installed on the stirring kettle rotating shaft through the corresponding blade brackets. The double spiral blades are each composed of a first spiral section and a second spiral section connected in sequence. The first spiral section and the second spiral section are both thin sheet structures extending in a spiral shape, and the spiral directions of the first spiral section and the second spiral section are opposite.

[0008] By adopting the above composting chamber stirring kettle, with the cutting tools of each stirring kettle arranged in a spiral line, and at the same time, the double spiral blade is designed to be composed of a first spiral section and a second spiral section with opposite spiral directions, when the composting chamber stirring kettle rotates, it can drive the culture medium to be turned and stirred while being conveyed from one end to the other end. Furthermore, by continuously switching the forward and reverse rotations of the composting chamber stirring kettle, the two-way back-and-forth conveyance of the culture medium is realized, with excellent stirring ability, greatly improving the stirring efficiency of the culture medium, avoiding the problem of stirring jamming caused by the agglomeration and solidification of the insufficiently stirred culture medium, thereby increasing the biodegradation rate of the culture medium. Moreover, the culture media at both ends can be fully mixed and stirred, preventing the solidification of the culture medium at the ends, further enhancing the biodegradation rate, and avoiding the generation of toxic and harmful gases due to anaerobic reactions.

[0009] In some embodiments, the blade brackets located between adjacent double spiral blades each include a bracket base adapted to the stirring kettle rotating shaft and two blade support rods fixed on the bracket base, and the blade brackets located at both ends of the stirring kettle rotating shaft each include a bracket base adapted to the stirring kettle rotating shaft and one blade support rod fixed on the bracket base. The bracket bases are all detachably installed on the stirring kettle rotating shaft, and both ends of the double spiral blade are bent to form connection and cooperation parts respectively detachably connected to the outer ends of the corresponding blade support rods.

[0010] In some embodiments, the connection and cooperation parts are respectively riveted to the outer ends of the corresponding blade support rods.

[0011] In some embodiments, the blade brackets located between adjacent double spiral blades each include a bracket base adapted to the stirring kettle rotating shaft and two blade support rods fixed on the bracket base, and the blade brackets located at both ends of the stirring kettle rotating shaft each include a bracket base adapted to the stirring kettle rotating shaft and one blade support rod fixed on the bracket base. The bracket bases are all detachably installed on the stirring kettle rotating shaft, and both ends of the double spiral blade are fixed to the outer ends of the corresponding blade support rods by welding processes.

[0012] In some embodiments, the bracket base is detachably installed on the stirring kettle rotating shaft by bolts.

[0013] In some embodiments, the blade brackets are all strip-shaped thin sheet structures extending radially along the stirring kettle rotating shaft. The inner ends of the blade brackets are welded and fixed to the stirring kettle rotating shaft. The double spiral blade is integrally formed with the blade brackets at both ends thereof or is fixedly connected to the outer ends of the corresponding blade brackets by welding processes.

[0014] The second aspect of the present application relates to a biodegradable toilet stirring and discharging structure, including a biodegradable container with an open top, a stirring kettle control device, and the above-mentioned compost chamber stirring kettle. The compost chamber stirring kettle is rotatably installed in the biodegradable container. The stirring kettle control device is installed on the biodegradable container and can drive the rotation of the stirring kettle rotating shaft.

[0015] With the above structure, the compost chamber stirring kettle can fully stir the culture medium in the biodegradable container, effectively improve the speed of biodegradation, and at the same time avoid the generation of toxic and harmful gases due to anaerobic reactions.

[0016] In some embodiments, the interior of the biodegradable container is divided into a compost chamber and a discharge chamber distributed vertically by a partition plate. The compost chamber stirring kettle is rotatably installed at the bottom of the compost chamber. The partition plate is a circular arc structure adapted to the compost chamber stirring kettle and has a waste discharge slit connecting the compost chamber and the discharge chamber. A spiral auger is rotatably installed in the discharge chamber. The discharge chamber is a cylindrical cavity structure adapted to the spiral auger, and a waste discharge port is provided at one end of the discharge chamber. A auger control device for driving the rotation of the spiral auger is installed on the biodegradable container.

[0017] In some embodiments, the spiral auger includes an auger shaft and auger blades arranged in a spiral shape on the outer peripheral surface of the auger shaft. An anti-leakage baffle extending along the axial direction of the auger shaft is fixedly connected to the outer edge of the auger blade. The anti-leakage baffle is an arc-shaped sheet structure and is adapted to the waste discharge slit. The axis of the anti-leakage baffle coincides with the axis of the auger shaft. When the spiral auger stops rotating, the auger control device rotates the anti-leakage baffle to directly below the waste discharge slit to block the waste discharge slit.

[0018] In some embodiments, at least one connecting bridge distributed along the length direction of the waste discharge slit is formed in the waste discharge slit of the partition plate, and both ends of each connecting bridge are combined with the partition plates on both sides in the width direction of the waste discharge slit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1 of the compost chamber stirring kettle;

[0020] Figure 2 It is a schematic structural diagram of Embodiment 2 of the compost chamber stirring kettle;

[0021] Figure 3 It is a schematic structural diagram of Embodiment 3 of the compost chamber stirring kettle;

[0022] Figure 4 It is a schematic structural diagram of one perspective of the biodegradable toilet stirring and discharging structure;

[0023] Figure 5Schematic diagram of another perspective of the stirring and discharging structure of a biodegradable toilet;

[0024] Figure 6 Cross-sectional view of one perspective of the stirring and discharging structure of a biodegradable toilet;

[0025] Figure 7 Cross-sectional view of another perspective of the stirring and discharging structure of a biodegradable toilet;

[0026] Figure 8 Schematic diagram of the structure of Screw Auger Embodiment 1;

[0027] Figure 9 Schematic diagram of the structure of Screw Auger Embodiment 2. Detailed implementation manners

[0028] The present utility model will be further described below in conjunction with embodiments and drawings.

[0029] Composting chamber stirring kettle Embodiment 1:

[0030] As Figure 1 shown, a composting chamber stirring kettle mainly includes a stirring kettle rotating shaft 4a and stirring kettle cutters 4b arranged in a spiral extension on the outer peripheral surface of the stirring kettle rotating shaft 4a. Among them, the stirring kettle rotating shaft 4a can be a hollow shaft structure or a solid shaft structure.

[0031] In this embodiment, the stirring kettle cutters 4b all include double spiral blades 4b1 and blade brackets 4b2 arranged at both ends of the double spiral blades 4b1. Both ends of the double spiral blades 4b1 are respectively installed on the stirring kettle rotating shaft 4a through the corresponding blade brackets 4b2, that is: the double spiral blades 4b1 are arranged on the circumferential outer side of the stirring kettle rotating shaft 4a. Rotating the stirring kettle rotating shaft 4a can stir the culture medium through the double spiral blades 4b1. And, because each stirring kettle cutter 4b is arranged in a spiral line, when the composting chamber stirring kettle rotates, it can drive the culture medium to be turned and stirred while being conveyed from one end to the other end. Furthermore, by continuously switching the forward and reverse rotations of the composting chamber stirring kettle, the two-way back-and-forth conveying of the culture medium is realized, and the stirring ability is excellent, greatly improving the stirring efficiency of the culture medium, thereby increasing the biodegradation speed of the culture medium.

[0032] Moreover, each double - helix blade 4b1 is composed of a first helix segment 4b11 and a second helix segment 4b12 connected in sequence. Both the first helix segment 4b11 and the second helix segment 4b12 are thin - sheet structures extending in a helical line, and the helix directions of the first helix segment 4b11 and the second helix segment 4b12 are opposite. In this embodiment, by designing the double - helix blade 4b1 to be composed of the first helix segment 4b11 and the second helix segment 4b12 with opposite helix directions, it can effectively stir the culture medium at the end of the biodegradable container while pushing the culture medium at the end towards the other end, avoiding the solidification of the culture medium at the end, thereby further enhancing the biodegradation rate and avoiding the generation of toxic and harmful gases due to anaerobic reactions.

[0033] In this embodiment, the blade support 4b2 has the following two structures:

[0034] Blade support 4b2 structure one: The blade supports 4b2 located between adjacent double - helix blades 4b1 each include a support base 4b21 adapted to the stirring kettle rotating shaft 4a and two blade support rods 4b22 fixed on the support base 4b21. That is, two blade support rods 4b22 are provided on one support base 4b21, and the two blade support rods 4b22 are respectively connected to different double - helix blades 4b1.

[0035] Blade support 4b2 structure two: The blade supports 4b2 located at both ends of the stirring kettle rotating shaft 4a each include a support base 4b21 adapted to the stirring kettle rotating shaft 4a and one blade support rod 4b22 fixed on the support base 4b21. That is, for the two blade supports 4b2 located at both ends of the stirring kettle rotating shaft 4a, one blade support rod 4b22 is provided on one support base 4b21.

[0036] Therefore, by setting the blade support 4b2 structure one, adjacent double - helix blades 4b1 share the same blade support 4b2, which is not only easy to assemble, but also reduces the cost of components, and is also conducive to the position matching between adjacent double - helix blades 4b1.

[0037] Furthermore, the support base 4b21 is detachably installed on the stirring kettle rotating shaft 4a. In this embodiment, the support base 4b21 is preferably detachably installed on the stirring kettle rotating shaft 4a by bolts, which is simple, reliable, and easy to assemble and disassemble.

[0038] Furthermore, both ends of the double - helix blade 4b1 are bent to form connection and cooperation parts 4b13 that are respectively detachably connected to the outer ends of the corresponding blade support rods 4b22, ensuring the convenience of their assembly. At the same time, in this embodiment, the connection and cooperation parts 4b13 are preferably connected by being respectively riveted to the outer ends of the corresponding blade support rods 4b22, which is simple, reliable, and can minimize the interference with stirring as much as possible.

[0039] Generally speaking, the compost chamber stirring kettle of this embodiment is assembled by four components. The structure of each component is very simple, easy to process and form, and the cost is low. At the same time, each component can be flexibly removed when damaged or in need of maintenance, and the installation after completion is also very convenient. Especially after long-term use, each component can be removed and cleaned and maintained separately, so that the stirring efficiency of the compost chamber stirring kettle can be maintained for a long time.

[0040] Embodiment 2 of the compost chamber stirring kettle:

[0041] Please refer to Figure 2 , the main structure of this embodiment is exactly the same as that of Embodiment 1 of the compost chamber stirring kettle, and the difference is that both ends of the double helix blade 4b1 are fixed to the outer ends of the corresponding blade support rods 4b22 by welding process. Compared with Embodiment 1 of the compost chamber stirring kettle, the process requirements are relatively higher, and the welds are more likely to break after long-term use. At the same time, when the double helix blade 4b1 or the blade support 4b2 is damaged, the difficulty of replacement and maintenance is also higher.

[0042] It should be noted that each double helix blade 4b1 can also be integrally formed with each blade support 4b2, but the process difficulty is very large and the cost is relatively high.

[0043] Embodiment 3 of the compost chamber stirring kettle:

[0044] Please refer to Figure 3 , the main structure of this embodiment is exactly the same as that of Embodiment 1 of the compost chamber stirring kettle, and the difference is that the blade supports 4b2 are all strip-shaped thin plate structures extending radially along the stirring kettle rotating shaft 4a. The inner ends of the blade supports 4b2 are welded and fixed to the stirring kettle rotating shaft 4a. The double helix blade 4b1 is integrally formed with the blade supports 4b2 at both ends or is fixedly connected to the outer ends of the corresponding blade supports 4b2 by welding process. This embodiment is the same as Embodiment 2 of the compost chamber stirring kettle. The welds are likely to break after long-term use. At the same time, the difficulty of replacement and maintenance of the stirring kettle rotating shaft 4a and the stirring kettle tool 4b is also higher.

[0045] Please refer to Figures 4 - 9 , a biodegradable toilet stirring and discharging structure, including a biodegradable container 2 with an open upper part, a stirring kettle control device 5 and a compost chamber stirring kettle. Among them, the compost chamber stirring kettle can be any one of Embodiments 1-3 of the compost chamber stirring kettle. The compost chamber stirring kettle is rotatably installed in the biodegradable container 2. The stirring kettle control device 5 is installed on the biodegradable container 2 and can drive the stirring kettle rotating shaft 4a to rotate. The stirring kettle control device 5 controls the rotation of the compost chamber stirring kettle, so as to fully stir the culture medium in the biodegradable container 2, effectively improve the speed of biodegradation, and avoid the generation of toxic and harmful gases due to anaerobic reaction at the same time.

[0046] In this embodiment, the interior of the biodegradable container 2 is divided into a compost chamber 2b and a discharge chamber 2c which are distributed vertically by a partition plate 2a. The compost chamber agitator is rotatably installed at the bottom of the compost chamber 2b. The partition plate 2a is an arc-shaped structure adapted to the compost chamber agitator, that is: the double spiral blades 4b1 of the compost chamber agitator can rotate relative to the partition plate 2a in contact or with a small clearance, so as to stir the culture medium in the compost chamber 2b.

[0047] Moreover, the partition plate 2a is provided with a waste discharge slit 2a1 communicating the compost chamber 2b and the discharge chamber 2c. The waste discharge slit 2a1 extends along the length direction of the discharge chamber 2c. A screw auger 1 is rotatably installed in the discharge chamber 2c. The discharge chamber 2c is a cylindrical cavity structure adapted to the screw auger 1, so as to reduce the residue in the discharge chamber 2c and improve the conveying efficiency of the screw auger 1 at the same time. One end of the discharge chamber 2c is provided with a waste discharge port 2d, and the residue is discharged from the waste discharge port 2d. At the same time, a screw auger control device 3 for driving the screw auger 1 to rotate is installed on the biodegradable container 2.

[0048] The agitator control device 5 has the following two implementation manners:

[0049] Embodiment 1 of the agitator control device 5:

[0050] Please refer to Figure 4 and Figure 6 , the agitator control device 5 is an agitator drive motor installed on one side wall of the biodegradable container 2. After the motor shaft of the agitator drive motor penetrates into the compost chamber 2b, it can be directly coaxially fixed to one end of the agitator rotating shaft 4a. Therefore, the motor shaft of the agitator drive motor can drive the agitator rotating shaft 4a to rotate synchronously with it, or it can be coaxially fixed to one end of the agitator rotating shaft 4a through a coupling. The electric drive method is more labor-saving and has a high degree of automation.

[0051] Embodiment 2 of the agitator control device 5:

[0052] The agitator control device 5 is a hand crank (not shown in the figure) rotatably installed on one side wall of the biodegradable container 2. After the connecting shaft of the hand crank penetrates into the compost chamber 2b, it can be directly coaxially fixed to one end of the agitator rotating shaft 4a, or it can be coaxially fixed to one end of the agitator rotating shaft 4a through a coupling. Therefore, the connecting shaft of the hand crank can drive the agitator rotating shaft 4a to rotate synchronously with it. The hand-operated drive method has a lower cost.

[0053] The screw auger 1 has the following two implementation manners:

[0054] Embodiment 1 of the screw auger 1:

[0055] Please refer to Figure 8 The screw auger 1 includes an auger shaft 1a and an auger blade 1b disposed on the outer peripheral surface of the auger shaft 1a and extending in a spiral line. Among them, the auger shaft 1a can be a hollow shaft structure or a solid shaft structure. The auger shaft 1a and the auger blade 1b form a conventional screw auger.

[0056] In this embodiment, a leakage prevention baffle 1c extending along the axial direction of the auger shaft 1a is fixedly connected to the outer edge of the auger blade 1b. The leakage prevention baffle 1c is an arc-shaped sheet structure and is adapted to the waste discharge slot 2a1. Moreover, the axis line of the leakage prevention baffle 1c coincides with the axis line of the auger shaft 1a.

[0057] The distance between the outer edge of each position of the auger blade 1b and the axis line of the auger shaft 1a is equal. The leakage prevention baffle 1c is fixed to the outer edge of the auger blade 1b by a welding process. Therefore, by the overall rotation of the screw auger 1, the conveying function of the material can be realized. At the same time, by setting the leakage prevention baffle 1c, the waste discharge slot 2a1 can be blocked when it stops rotating. It should be noted that the leakage prevention baffle 1c is usually fixed to the auger blade 1b by a welding process, and the process is simple and easy to manufacture. Of course, the auger shaft 1a, the auger blade 1b and the leakage prevention baffle 1c can also be integrally formed by a casting process, and the structural strength is higher.

[0058] Furthermore, the width of each part of the leakage prevention baffle 1c along the circumferential direction of the auger shaft 1a is consistent, which is not only easy to process, but also the leakage prevention baffle 1c is preferably made as narrow as possible, as long as it can just block the waste discharge slot 2a1, so as to minimize the influence on the feeding efficiency of the screw auger 1.

[0059] In this embodiment, the distance between the outer edge of each position of the auger blade 1b and the axis line of the auger shaft 1a is equal. The leakage prevention baffle 1c is fixed to the outer edge of the auger blade 1b by a welding process. The process is simple and easy to manufacture. Moreover, the thickness of the leakage prevention baffle 1c can be made very thin, so that the influence on the feeding efficiency of the screw auger 1 is smaller.

[0060] Embodiment 2 of the screw auger 1:

[0061] Please refer to Figure 9, the main structure of this embodiment is exactly the same as that of the first embodiment of the spiral auger 1. The difference lies in that: a plurality of blade mounting grooves 1b1 adapted to the anti-leakage baffle 1c are formed by recessing the outer edge of the auger blade 1b. The anti-leakage baffle 1c is snapped into each blade mounting groove 1b1 and fixed by welding. The distance between the outer edge of the auger blade 1b where there is no blade mounting groove 1b1 and the axis of the auger shaft 1a is equal to the distance between the outer surface of the anti-leakage baffle 1c and the axis of the auger shaft 1a, so that the circumferential outer edge of the spiral auger 1 fits better with the inner wall of the space where the spiral auger 1 is located, which can improve the feeding efficiency of the spiral auger 1; moreover, the anti-leakage baffle 1c of this embodiment not only has higher installation reliability, but also is less impacted when rotating, so that the anti-leakage baffle 1c is not easily deformed and the service life is extended.

[0062] Regarding the anti-leakage baffle 1c and the waste discharge slot 2a1, the length of the waste discharge slot 2a1 is less than or equal to the length of the anti-leakage baffle 1c, and the width of the waste discharge slot 2a1 is less than or equal to the width of the anti-leakage baffle 1c. Most importantly, when the spiral auger 1 stops rotating, the auger control device 3 rotates the anti-leakage baffle 1c to directly below the waste discharge slot 2a1, so that the anti-leakage baffle 1c blocks the waste discharge slot 2a1.

[0063] Therefore, when the auger control device 3 drives the spiral auger 1 to rotate, the waste in the composting chamber 2b can continuously fall into the discharge chamber 2c through the waste discharge slot 2a1. At the same time, through the rotation of the spiral auger 1, the waste in the discharge chamber 2c can be discharged outwards through the waste discharge port 2d. Compared with the prior art, the whole process is not only simple and convenient to operate, but also greatly improves the user experience. Moreover, when waste discharge is not required, the anti-leakage baffle 1c can reliably block the waste discharge slot 2a1, thus avoiding the hardening of the medium and fertilizer in the discharge chamber for a long time, resulting in the jamming or inability to rotate of the spiral auger 1, causing difficulties in using the spiral auger 1, and further ensuring the long-term reliable and stable operation of the spiral auger 1 and reducing the maintenance frequency of the spiral auger 1.

[0064] Further, please refer to Figure 4 , the partition plate 2a forms at least one connecting bridge 2a2 distributed along the length direction of the waste discharge slot 2a1 in the waste discharge slot 2a1. Both ends of each connecting bridge 2a2 are combined with the partition plate 2a on both sides in the width direction of the waste discharge slot 2a1, which can effectively avoid the deformation of the waste discharge slot 2a1, thus avoiding interference with the rotation of the auger blade 1b and the anti-leakage baffle 1c in the lower discharge chamber 2c and the composting chamber agitator in the upper composting chamber 2b, and reducing the maintenance frequency.

[0065] Further, the waste discharge slot 2a1 is opened at the middle position of the partition plate 2a, which is also the lowest position of the partition plate 2a, so as to better discharge waste and improve the waste discharge efficiency.

[0066] Please refer to Figure 5 , a waste discharge pipe 2e communicating with the discharge cavity 2c is provided on one side wall of the biodegradable container 2, and the waste discharge pipe 2e constitutes a waste discharge port 2d. The outlet end of the waste discharge pipe 2e is provided with a screw shaft support seat 2f coaxial with it. One end of the screw shaft 1a is rotatably installed on the screw shaft support seat 2f. The screw shaft support seat 2f is fixedly connected to the pipe wall of the waste discharge pipe 2e through a plurality of connecting ribs 2g uniformly distributed along its circumferential direction, thereby ensuring the reliable installation of the leak-proof screw auger.

[0067] Finally, it should be noted that the above description is only the preferred embodiment of the present invention. Under the inspiration of the present invention, those of ordinary skill in the art can make various similar representations without violating the purpose and claims of the present invention. Such transformations all fall within the protection scope of the present invention.

Claims

1. A compost chamber stirring kettle, comprising a stirring kettle rotating shaft (4a) and stirring kettle cutters (4b) arranged on the outer peripheral surface of the stirring kettle rotating shaft (4a) and extending in a spiral line, characterized in that: The stirring kettle cutters (4b) each include double - helix blades (4b1) and blade brackets (4b2) provided at both ends of the double - helix blades (4b1). The two ends of the double - helix blades (4b1) are respectively installed on the stirring kettle rotating shaft (4a) through the corresponding blade brackets (4b2). The double - helix blades (4b1) are each composed of a first helical section (4b11) and a second helical section (4b12) connected in sequence. Both the first helical section (4b11) and the second helical section (4b12) are thin - sheet structures extending in a spiral line, and the helix directions of the first helical section (4b11) and the second helical section (4b12) are opposite.

2. The compost chamber stirring kettle according to claim 1, characterized in that: The blade brackets (4b2) located between adjacent double - helix blades (4b1) each include a bracket base (4b21) adapted to the stirring kettle rotating shaft (4a) and two blade support rods (4b22) fixed on the bracket base (4b21). The blade brackets (4b2) located at both ends of the stirring kettle rotating shaft (4a) each include a bracket base (4b21) adapted to the stirring kettle rotating shaft (4a) and one blade support rod (4b22) fixed on the bracket base (4b21). The bracket bases (4b21) are detachably installed on the stirring kettle rotating shaft (4a). Connecting and mating parts (4b13) are formed by bending both ends of the double - helix blades (4b1) and are respectively detachably connected to the outer ends of the corresponding blade support rods (4b22).

3. The compost chamber stirring kettle according to claim 2, characterized in that: The connecting and mating parts (4b13) are respectively riveted to the outer ends of the corresponding blade support rods (4b22).

4. The compost chamber stirring kettle according to claim 1, characterized in that: The blade brackets (4b2) located between adjacent double - helix blades (4b1) each include a bracket base (4b21) adapted to the stirring kettle rotating shaft (4a) and two blade support rods (4b22) fixed on the bracket base (4b21). The blade brackets (4b2) located at both ends of the stirring kettle rotating shaft (4a) each include a bracket base (4b21) adapted to the stirring kettle rotating shaft (4a) and one blade support rod (4b22) fixed on the bracket base (4b21). The bracket bases (4b21) are detachably installed on the stirring kettle rotating shaft (4a). The two ends of the double - helix blades (4b1) are respectively fixed to the outer ends of the corresponding blade support rods (4b22) by a welding process.

5. The composting chamber stirring kettle according to claim 2 or 4, characterized in that: The bracket base (4b21) is detachably installed on the stirring kettle rotating shaft (4a) by bolts.

6. The compost chamber agitator according to claim 1, wherein: The blade brackets (4b2) are each strip - shaped thin - sheet structures extending radially along the stirring kettle rotating shaft (4a). The inner ends of the blade brackets (4b2) are welded and fixed to the stirring kettle rotating shaft (4a). The double - helix blades (4b1) are integrally formed with the blade brackets (4b2) at their two ends, or are fixedly connected to the outer ends of the corresponding blade brackets (4b2) by a welding process.

7. A biodegradable toilet stirring and discharging structure, characterized in that: It includes a biodegradable container (2) with an open upper part, a stirring kettle control device (5), and the compost chamber stirring kettle according to any one of claims 1-6. The compost chamber stirring kettle is rotatably installed in the biodegradable container (2). The stirring kettle control device (5) is installed on the biodegradable container (2) and can drive the stirring kettle rotating shaft (4a) to rotate.

8. The biodegradable toilet stirring and discharging structure according to claim 7, characterized in that: The interior of the biodegradable container (2) is divided into a compost chamber (2b) and a discharge chamber (2c) which are distributed up and down by a partition plate (2a). The compost chamber stirring kettle is rotatably installed at the bottom of the compost chamber (2b). The partition plate (2a) is an arc-shaped structure adapted to the compost chamber stirring kettle and has a waste discharge slit (2a1) communicating the compost chamber (2b) and the discharge chamber (2c). A screw auger (1) is rotatably installed in the discharge chamber (2c). The discharge chamber (2c) is a cylindrical cavity structure adapted to the screw auger (1), and a waste discharge port (2d) is opened at one end of the discharge chamber (2c). A auger control device (3) for driving the screw auger (1) to rotate is installed on the biodegradable container (2).

9. The biodegradable toilet stirring and discharging structure according to claim 8, characterized in that: The screw auger (1) includes a auger shaft (1a) and auger blades (1b) arranged in a spiral extension on the outer peripheral surface of the auger shaft (1a). A leak-proof baffle (1c) extending along the axial direction of the auger shaft (1a) is fixedly connected to the outer edge of the auger blade (1b). The leak-proof baffle (1c) is an arc-shaped sheet structure and is adapted to the waste discharge slit (2a1), and the axis line of the leak-proof baffle (1c) coincides with the axis line of the auger shaft (1a). When the screw auger (1) stops rotating, the auger control device (3) rotates the leak-proof baffle (1c) to directly below the waste discharge slit (2a1) to block the waste discharge slit (2a1).

10. The biodegradable toilet stirring and discharging structure according to claim 8, characterized in that: At least one connecting bridge (2a2) distributed along the length direction of the waste discharge slit (2a1) is formed in the waste discharge slit (2a1) of the partition plate (2a). Both ends of each connecting bridge (2a2) are combined with the partition plate (2a) on both sides in the width direction of the waste discharge slit (2a1).

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