Rural domestic sewage treatment equipment

Abstract

The invention relates to the technical field of sewage treatment, and discloses rural domestic sewage treatment equipment which comprises an underground structure body, a top cover arranged at the top of the underground structure body, and a sewage inlet pipe and a sewage outlet pipe which are arranged on the outer side of the underground structure body, a flow guide assembly and a conveying assembly are arranged between the sedimentation tank and the fermentation tank, and the flow guide assembly specifically comprises a communication hole formed between the sedimentation tank and the fermentation tank, a communication pipe arranged in the communication hole and an input pipe arranged at the end, located in the sedimentation tank, of the communication pipe. According to the rural domestic sewage treatment equipment, the fermentation tank is divided into a plurality of sections, after sewage is settled in the settling tank, solid matters in the settling tank and sewage at different levels are respectively conveyed into different sections by utilizing the flow guide assembly and the conveying assembly and are respectively fermented, and proper fermentation parameters are respectively set in each section; therefore, the fermentation efficiency and effect of the sewage can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a rural domestic sewage treatment device. Background Art

[0002] Rural domestic sewage refers to the sewage generated by rural residents in their daily lives, mainly including toilet flushing water, kitchen washing water, laundry wastewater, etc. With the continuous development of the new rural project, rural domestic sewage can no longer be discharged at will, but needs to be centrally treated to avoid a large amount of domestic sewage from polluting the ecological environment.

[0003] The treatment of domestic sewage requires the use of sewage treatment equipment. Common types of equipment include integrated sewage treatment equipment, biogas tanks, artificial wetlands and stabilization ponds. The selection and operation and maintenance of rural domestic sewage treatment equipment require comprehensive consideration of multiple factors to achieve effective treatment and standard discharge of rural domestic sewage and protect the rural ecological environment.

[0004] Since rural areas are sparsely populated and have low incomes, most areas choose to use biogas digesters as sewage treatment equipment, which occupy a large area and have low construction and operation costs. The biogas produced by fermentation in the biogas digesters can also be used as energy for villagers, which can play a better role in environmental protection.

[0005] The prior art has the following defects: The sources of rural domestic sewage mainly include toilets, bathrooms, kitchens, breeding pens and other places. Due to the stable construction cost, the biogas digesters in rural areas do not have a complete sewage pretreatment system. After the sewage is discharged into the biogas digester, the solid matter such as feces in the sewage will settle below the sewage, and the sewage will also be stratified according to its own dissolved organic matter content. The high concentration sinks to the bottom, the low concentration floats on the top, and the grease sewage floats on the top. Biogas fermentation is the decomposition of organic matter by microorganisms, and the solid matter in the biogas digester, the different layers of sewage, and the grease organic matter floating on the surface have different contents, and the fermentation time and the best fermentation conditions are also different. Therefore, this will lead to slow and insufficient fermentation of sewage in the biogas digester, resulting in poor efficiency and effect of sewage treatment, and low energy utilization. Summary of the invention

[0006] In view of the problem that the sewage fermentation in the biogas digester is slow and insufficient in the prior art, a rural domestic sewage treatment equipment is proposed.

[0007] The present application provides a rural domestic sewage treatment device, the purpose of which is to classify and ferment the sewage in a biogas tank to improve the fermentation efficiency.

[0008] The technical scheme of the present invention is: a rural domestic sewage treatment equipment, including an underground structure, a top cover arranged on the top of the underground structure, a sewage discharge pipe and a discharge pipe arranged outside the underground structure, the underground structure specifically includes a sedimentation tank and a fermentation tank, a flow guide component and a transmission component are arranged between the sedimentation tank and the fermentation tank, the flow guide component specifically includes a connecting hole opened between the sedimentation tank and the fermentation tank, a connecting pipe arranged inside the connecting hole, and an input pipe arranged at one end of the connecting pipe located in the sedimentation tank, the transmission component specifically includes an outer cylinder arranged inside the sedimentation tank, an outer interface opened outside the outer cylinder, a screw arranged inside the outer cylinder, a pumping motor arranged at the top of the outer cylinder, a discharge interface arranged between the sedimentation tank and the fermentation tank, and a solid matter discharge pipe arranged inside the discharge interface; The sewage discharge pipe is connected to the sedimentation tank, and the discharge pipe is connected to the fermentation tank. The fermentation tank is divided into four sections, wherein the first three sections are connected to the sedimentation tank through the guide assembly, and the last section is connected to the sedimentation tank through the transmission assembly. The installation height of the guide assembly gradually increases in the direction away from the transmission assembly, the pumping motor is connected to the screw, and the solid matter discharge pipe is connected to the outer cylinder.

[0009] Furthermore, there are two sedimentation tanks, which are respectively distributed on both sides of the fermentation tank.

[0010] Furthermore, the top cover includes a sedimentation area cover and a fermentation area cover, and the sedimentation area cover and the fermentation area cover respectively cover the sedimentation tank and the fermentation tank.

[0011] Furthermore, the flow guide assembly further includes a rotating joint arranged between the connecting pipe and the input pipe, a side mounting plate arranged at one end of the input pipe away from the connecting pipe, a positioning bolt arranged on the surface of the side mounting plate, and a positioning hole arranged on the inner wall of the sedimentation tank; The input pipe is rotatably connected to the rotary joint, the positioning bolt is inserted into the positioning hole, and the positioning holes are distributed in a ring array around the central axis of the rotary joint.

[0012] Furthermore, the bottom surface of the sedimentation tank adopts a diagonally inclined design, wherein the side close to the conveying component is lower, and the side close to the fermentation tank is lower, and the conveying component is located at the lowest corner of the bottom wall of the sedimentation tank.

[0013] Furthermore, the conveying assembly also includes a collecting tank opened on the bottom surface of the sedimentation tank, and the outer cylinder is inserted into the collecting tank.

[0014] Furthermore, a fermentation tank is placed inside the fermentation pool, and the discharge pipe, the connecting pipe, and the solid matter discharge pipe are all connected to the fermentation tank.

[0015] Furthermore, an isolation assembly is installed at one end of the flow guide assembly, and the isolation assembly specifically includes an external pipe arranged at one end of the input pipe away from the connecting pipe, and a filter cylinder arranged at one end of the external pipe away from the input pipe.

[0016] Furthermore, the isolation assembly also includes a placement platform and a mounting frame arranged inside the filter cylinder, a sliding shaft arranged inside the filter cylinder and the mounting frame, a top plate arranged at an end of the sliding shaft away from the external pipe, a cleaning ring arranged outside the filter cylinder, a connecting rod arranged between the cleaning ring and the top plate, a plastic ball arranged at an end of the sliding shaft close to the external pipe, and an elastic member arranged between the plastic ball and the mounting frame; The sliding shaft passes through the mounting frame and the filter cylinder, the cleaning ring is attached to the outer side of the filter cylinder, and the length of the connecting rod is the same as that of the filter cylinder.

[0017] Beneficial effects of the present invention: 1. By dividing the fermentation tank into multiple sections, after the sewage is precipitated in the sedimentation tank, the solid matter in the sedimentation tank and the sewage of different levels are sent to different sections by means of the diversion component and the transmission component for fermentation respectively. Appropriate fermentation parameters are set in each section, which is conducive to improving the fermentation efficiency and effect of sewage and increasing energy utilization. At the same time, the above-mentioned equipment has a low construction and use cost in the structural stage, which is more conducive to popularization in rural areas.

[0018] 2. By setting a rotating joint, the input pipe can rotate around the connecting pipe and fix it through positioning bolts and positioning holes. In this way, the ratio of solid matter and sewage and the occupancy ratio of the upper, middle and lower layers of sewage can be adjusted according to the actual discharge situation of the villagers, and then the ratio of sewage in the first three intervals entering the fermentation tank can be adjusted. In this way, the equipment can collect sewage and solid matter in different areas more accurately and have a wider range of applications. In addition, the equipment is easy to adjust and can adjust itself after the discharge nature of the villagers' homes changes.

[0019] 3. By adopting a diagonally inclined design for the bottom of the sedimentation tank, the solid matter settled in the sedimentation tank is gathered in the discharge interface, which is convenient for the pushing work of the screw. At the same time, the three guide components are set in the higher area of ​​the bottom of the sedimentation tank to keep the guide components away from the solid matter, avoiding the solid matter from being lifted up during the suction process of the guide components, and ensuring the stable suction work of the guide components.

[0020] 4. By setting up the isolation component, the impurities in the sewage will be blocked by the filter cylinder before the sewage flows into the input pipe, so as to keep the sewage entering the fermentation tank pure and avoid affecting the later fermentation. At the same time, as the water flows, the scraper ring scrapes the surface of the filter cylinder and cleans the attachments on the surface of the filter cylinder to ensure the stability of sewage circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the rural domestic sewage treatment equipment of the present invention; Figure 2 It is a schematic diagram of the interior of the underground structure of the present invention; Figure 3 It is a schematic diagram of the underground structure of the present invention; Figure 4 It is a schematic diagram of the fermentation tank of the present invention; Figure 5 It is the internal schematic diagram of the sedimentation tank of the present invention; Figure 6 It is a schematic diagram of the flow guide assembly of the present invention; Figure 7 This is a disassembled diagram of the flow guide assembly of the present invention; Figure 8 It is a schematic diagram of the transmission component of the present invention; Fig. 9 It is a schematic diagram of the isolation component of the present invention; Fig.10 This is a disassembled diagram of the isolation assembly of the present invention; Fig.11 For the present invention Fig.10 Schematic diagram after flipping; Fig.12 A top view of the isolation assembly of the present invention; Fig.13 For the present invention Fig.12 Sectional view at AA; Fig.14 For the present invention Fig.13 Enlarged view of the middle filter cylinder.

[0022] In the figure: 1. Underground structure; 2. Top cover; 21. Sedimentation area cover; 22. Fermentation area cover; 3. Sewage discharge pipe; 4. Discharge pipe; 5. Sedimentation tank; 6. Fermentation tank; 7. Diversion assembly; 71. Connecting hole; 72. Connecting pipe; 73. Input pipe; 74. Rotating joint; 75. Side mounting plate; 76. Positioning bolt; 77. Positioning hole; 8. Transmission assembly; 81. Outer cylinder; 82. External interface; 83. Screw; 84. Pumping motor; 85. Discharge interface; 86. Solid matter discharge pipe; 87. Collection tank; 9. Isolation assembly; 91. External tube; 92. Filter cylinder; 93. Placement table; 94. Mounting frame; 95. Sliding shaft; 96. Top plate; 97. Cleaning ring; 98. Connecting rod; 99. Plastic ball; 910. Elastic part; 10. Fermentation tank. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] Example 1, reference Figure 1-9, which is the first embodiment of the present invention, provides a rural domestic sewage treatment equipment, including an underground structure 1, a top cover 2 arranged on the top of the underground structure 1, a sewage discharge pipe 3 and a discharge pipe 4 arranged on the outside of the underground structure 1, the underground structure 1 specifically includes a sedimentation tank 5 and a fermentation tank 6, a guide component 7 and a transmission component 8 are arranged between the sedimentation tank 5 and the fermentation tank 6, the guide component 7 specifically includes a connecting hole 71 opened between the sedimentation tank 5 and the fermentation tank 6, a connecting pipe 72 arranged inside the connecting hole 71, and an input pipe 73 arranged at one end of the connecting pipe 72 located in the sedimentation tank 5. The transmission component 8 specifically includes an outer cylinder 81 arranged inside the sedimentation tank 5, an outer interface 82 opened outside the outer cylinder 81, a screw 83 arranged inside the outer cylinder 81, a pumping motor 84 arranged at the top of the outer cylinder 81, a discharge interface 85 arranged between the sedimentation tank 5 and the fermentation tank 6, and a solid matter discharge pipe 86 arranged inside the discharge interface 85.

[0025] Specifically, the underground structure 1 and the top cover 2 are made of concrete as a whole. The underground structure 1 needs to be buried underground, and the top cover 2 is flush with the ground. After the underground structure 1 is buried, a ditch needs to be dug along the outer wall of the underground structure 1. One end of the sewage inlet pipe 3 and the discharge pipe 4 passes through the outer wall of the underground structure 1, and the other end is laid along the ditch. The sedimentation tank 5 and the fermentation tank 6 are separated by a concrete wall, and a suction pump connected to the diversion component 7 is installed in the fermentation tank 6.

[0026] The sewage inlet pipe 3 is connected to the sedimentation tank 5, and the discharge pipe 4 is connected to the fermentation tank 6. The fermentation tank 6 is divided into four sections, wherein the first three sections are connected to the sedimentation tank 5 through the guide component 7, and the last section is connected to the sedimentation tank 5 through the transmission component 8. The four sections of the fermentation tank 6 are separated by concrete walls. A control system is respectively arranged in the four sections of the fermentation tank 6 to control the temperature, oxygen content and other parameters in the fermentation tank 6. There are two sedimentation tanks 5, which are respectively distributed on both sides of the fermentation tank 6. In this way, the two sedimentation tanks 5 are used in turn, which can give the sewage a certain sedimentation time so that it can be fully separated, which is convenient for the later collection of sewage of different concentrations.

[0027] The installation height of the guide component 7 gradually increases in the direction away from the transmission component 8, dividing the sewage in the sedimentation tank 5 into three layers of upper, middle and lower layers, and entering the fermentation tank 6 from different guide components 7 respectively. The upper, middle and lower layers of sewage are not divided in equal proportion, and are calculated according to the living habits of local villagers, that is, the discharge situation. The connecting pipe 72 passes through the connecting hole 71 to connect the fermentation tank 6 and the sedimentation tank 5. The outer cylinder 81 stands on the bottom wall of the sedimentation tank 5 and is fixed to the inner wall of the sedimentation tank 5 by bolts. The external interface 82 is located below the outer cylinder 81. The pumping motor 84 is fixed to the top of the outer cylinder 81 by bolts. The pumping motor 84 is connected to the screw 83. The discharge interface 85 connects the sedimentation tank 5 and the fermentation tank 6. One end of the solid discharge pipe 86 is connected to the outer cylinder 81, and the other end extends into the fermentation tank 6; when the outer cylinder 81 is installed, a certain inclination angle can be appropriately set to improve the pushing effect of the screw 83 on the solid matter at the bottom of the sedimentation tank 5.

[0028] The top cover 2 includes a sedimentation area cover 21 and a fermentation area cover 22, which respectively cover the sedimentation tank 5 and the fermentation tank 6. Two sedimentation area covers 21 are arranged above the sedimentation tank 5, and a fermentation area cover 22 is arranged above each section of the fermentation tank 6.

[0029] By dividing the fermentation tank 6 into a plurality of sections, after the sewage is precipitated in the sedimentation tank 5, the solid matter and sewage of different levels in the sedimentation tank 5 are respectively sent to different sections by means of the diversion component 7 and the transmission component 8 for fermentation. Appropriate fermentation parameters are set in each section, which is beneficial to improving the fermentation efficiency and effect of the sewage and increasing the energy utilization rate.

[0030] At the same time, the above equipment has low construction and use costs in the structural stage, which is more conducive to popularization in rural areas.

[0031] The flow guide assembly 7 also includes a rotating joint 74 arranged between the connecting pipe 72 and the input pipe 73, a side mounting plate 75 arranged at one end of the input pipe 73 away from the connecting pipe 72, a positioning bolt 76 arranged on the surface of the side mounting plate 75, and a positioning hole 77 arranged on the inner wall of the sedimentation tank 5.

[0032] Specifically, the input pipe 73 is rotatably connected to the rotating joint 74, the connecting pipe 72 is fixedly connected to the rotating joint 74, the side mounting plate 75 and the input pipe 73 are integrally formed, the positioning bolt 76 passes through the side mounting plate 75, and the positioning bolt 76 is inserted into the positioning hole 77. The positioning holes 77 are distributed in a circular array around the central axis of the rotating joint 74, and the distribution range of the positioning holes 77 extends clockwise from the six o'clock direction to the eleven o'clock direction at a maximum.

[0033] By setting a rotating joint 74, the input pipe 73 is allowed to rotate around the connecting pipe 72, and it is fixed by the positioning bolt 76 and the positioning hole 77. In this way, the ratio of solid matter and sewage, the occupancy ratio of the upper, middle and lower layers of sewage can be adjusted according to the actual discharge situation of the villagers, and then the ratio of sewage in the first three intervals entering the fermentation tank 6 can be adjusted. For example, in an ordinary village, it is set according to normal calculation. If the villagers' homes involve farmhouses, the content of detergent, grease and solid matter in the sewage will increase, and the ratio of upper sewage and solid matter needs to be appropriately increased. If the villagers' homes involve breeding, the ratio of solid matter needs to be appropriately increased. In this way, the equipment can collect sewage and solid matter by zoning more accurately and has a wider range of application. In addition, the equipment is easy to adjust and can adjust itself after the discharge nature of the villagers' homes changes.

[0034] Specifically, the bottom surface of the sedimentation tank 5 adopts a diagonally inclined design, wherein the side close to the conveying component 8 is lower, and the side close to the fermentation tank 6 is lower, and the conveying component 8 is located at the lowest corner of the bottom wall of the sedimentation tank 5; the conveying component 8 also includes a collecting groove 87 opened on the bottom surface of the sedimentation tank 5, and the outer cylinder 81 is inserted into the collecting groove 87, so that the solid matter precipitated in the sedimentation tank 5 is collected into the discharge interface 85, which is convenient for the pushing work of the screw 83. At the same time, the three guide components 7 are arranged in a higher area of ​​the bottom surface of the sedimentation tank 5, so that the guide components 7 are away from the solid matter, avoiding the solid matter from being lifted up during the suction process of the guide components 7, and ensuring the stable suction work of the guide components 7.

[0035] Specifically, a fermentation tank 10 is placed inside the fermentation pool 6, and the discharge pipe 4, the connecting pipe 72, and the solid matter discharge pipe 86 are all connected to the fermentation tank 10. When conditions permit, the fermentation tank 10 is selectively used to further improve the fermentation efficiency and the safety of biogas fermentation.

[0036] Example 2, reference Figure 9-14 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: an isolation assembly 9 is installed at one end of the guide assembly 7, and the isolation assembly 9 specifically includes an external pipe 91 arranged at the end of the input pipe 73 away from the connecting pipe 72, and a filter cylinder 92 arranged at the end of the external pipe 91 away from the input pipe 73; the isolation assembly 9 also includes a placement table 93 and a mounting frame 94 arranged inside the filter cylinder 92, a sliding shaft 95 arranged inside the filter cylinder 92 and the mounting frame 94, a top plate 96 arranged at the end of the sliding shaft 95 away from the external pipe 91, a scraping ring 97 arranged on the outside of the filter cylinder 92, a connecting rod 98 arranged between the scraping ring 97 and the top plate 96, a plastic ball 99 arranged at the end of the sliding shaft 95 close to the external pipe 91, and an elastic member 910 arranged between the plastic ball 99 and the mounting frame 94.

[0037] Specifically, the external tube 91 is threadedly installed in the input pipe 73, the filter cylinder 92 is threadedly installed in the external tube 91, the mounting platform 93 and the filter cylinder 92 are integrally formed, the mounting frame 94 is fitted with the mounting platform 93, the sliding shaft 95 passes through the mounting frame 94 and the filter cylinder 92, and the two ends of the sliding shaft 95 are respectively threadedly connected to the top plate 96 and the plastic ball 99, the connecting rod 98 is fixedly connected to the scraping ring 97 and the top plate 96, the scraping ring 97 is fitted to the outside of the filter cylinder 92, the length of the connecting rod 98 is the same as the length of the filter cylinder 92, and the elastic member 910 is surrounded by the outside of the sliding shaft 95. The elastic member 910 can be a metal spring, a hollow rubber spring, an elastic strip, etc.

[0038] By setting up the isolation component 9, the impurities in the sewage will be blocked by the filter cylinder 92 before the sewage flows into the input pipe 73, so as to keep the sewage entering the fermentation tank 6 pure and avoid affecting the later fermentation. At the same time, as the water flows, the scraper ring 97 scrapes the surface of the filter cylinder 92, cleans the attachments on the surface of the filter cylinder 92, and ensures the stability of sewage circulation.

[0039] Based on Examples 1-2, the working principle of a rural domestic sewage treatment device of the present invention is as follows: During installation, holes and ditches are dug on the ground, and then the underground structure 1 is buried in the holes. The connecting pipe 72 is passed through the connecting hole 71, and the solid discharge pipe 86 is passed through the discharge interface 85. The fermentation tank 10 is placed in the corresponding interval of the fermentation tank 6 by using a lifting device, and the connecting pipe 72 and the solid discharge pipe 86 are moved to be connected to the corresponding fermentation tank 10 respectively, and then the connecting pipe 72 is fixed in the connecting hole 71 by using a waterproof glue, and then the rotating joint 74 is fixed to one end of the connecting pipe 72 located in the sedimentation tank 5, and then the input pipe 73 is connected to the rotating joint 74, and finally the positioning bolt 76 is passed through the side mounting plate 75 and inserted into the positioning hole 77; the screw 83 is inserted into the outer cylinder 81, and the pumping motor 84 is installed on the top of the outer cylinder 81, and the power output shaft of the pumping motor 84 passes through the outer cylinder 81 and is fixed to the screw 83, and the outer cylinder 81 is moved to be connected to the solid discharge pipe 86, and then fixed by welding equipment.

[0040] The elastic member 910 and the mounting frame 94 are sequentially sleeved on the outside of the sliding shaft 95, and then the plastic ball 99 is installed on one end of the sliding shaft 95, and the other end of the sliding shaft 95 is passed through the filter cylinder 92. During this process, the elastic member 910 needs to be located between the sliding shaft 95 and the plastic ball 99 and fixed with glue. The cleaning ring 97 is sleeved on the outside of the filter cylinder 92, and then the sliding shaft 95 passes through one end of the filter cylinder 92 and is fixed to the top plate 96. Finally, the filter cylinder 92 is connected to the external pipe 91 to complete the assembly of the isolation component 9. The assembled isolation components 9 are inserted into the input pipe 73 one by one. After completing the above installation, the top cover 2 is covered on the sedimentation tank 5 and the fermentation tank 6 one by one.

[0041] When in use, the diversion component 7 is adjusted according to the living habits of the villagers, the positioning bolt 76 is pulled out of the positioning hole 77, and then the input pipe 73 is rotated along the distribution direction of the positioning hole 77. After the input pipe 73 rotates to a suitable position around the rotating joint 74, the positioning bolt 76 is pushed and inserted into the positioning hole 77 again. In this way, the diversion component 7 is adjusted in turn to adjust the proportion of the upper, middle and lower layers of sewage.

[0042] Domestic sewage is discharged into the sedimentation tank 5 on one side through the sewage discharge pipe 3. When the sewage in the sedimentation tank 5 on one side is collected to a certain amount, the sewage is introduced into the sedimentation tank 5 on the other side through the sewage discharge pipe 3. After a large amount of sewage is collected in the sedimentation tank 5, precipitation occurs. The solid matter is precipitated at the bottom of the sedimentation tank 5, and then slides downward along the bottom wall of the sedimentation tank 5, close to the conveying component 8. After the solid matter enters the collecting tank 87, the pumping motor 84 is started to drive the screw 83 to rotate. The screw 83 rotates to lift the solid matter in the collecting tank 87 upward through the thread. The solid matter rises along the outer cylinder 81 and is then discharged into the corresponding fermentation tank 10 through the solid matter discharge pipe 86. After the sewage is stratified into three layers of upper, middle and lower, the suction pump is started in sequence to suck the upper sewage into the corresponding fermentation tank 10 through the connecting pipe 72 and the input pipe 73. In this way, the sewage is sucked into the fermentation tank 10 in the order of upper, middle and lower.

[0043] Before sewage flows into the input pipe 73, it needs to pass through the filter screen cylinder 92 and the external pipe 91 first. In this way, the plastic ball 99 is impacted by the water flow and moves toward the input pipe 73. The plastic ball 99 pulls the elastic member 910 to drive the sliding shaft 95 to move, and the sliding shaft 95 drives the top plate 96 to move. The top plate 96 pushes the cleaning ring 97 through the connecting rod 98. The cleaning ring 97 slides on the surface of the filter screen cylinder 92 and moves toward the external pipe 91. When the sewage flows through the filter screen cylinder 92, the impurities in the sewage will be intercepted by the filter screen cylinder 92 and attached to the surface of the filter screen cylinder 92. When the suction work is stopped or there are too many attachments on the surface of the filter screen cylinder 92 that affect the flow of sewage, the plastic ball 99 is weakened by the impact of the water flow, and the elastic member 910 pulls it to reset. The sliding shaft 95 follows the pushing of the top plate 96 to move away from the external pipe 91. The top plate 96 pulls the cleaning ring 97 through the connecting rod 98. The cleaning ring 97 slides on the surface of the filter screen cylinder 92 to scrape off the attachments on its surface.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A rural domestic sewage treatment device, comprising an underground structure (1), a top cover (2) arranged on the top of the underground structure (1), and a sewage inlet pipe (3) and a discharge pipe (4) arranged outside the underground structure (1), characterized in that: The underground structure (1) specifically comprises a sedimentation tank (5) and a fermentation tank (6), wherein a flow guide component (7) and a conveying component (8) are arranged between the sedimentation tank (5) and the fermentation tank (6), wherein the flow guide component (7) specifically comprises a connecting hole (71) provided between the sedimentation tank (5) and the fermentation tank (6), a connecting pipe (72) provided inside the connecting hole (71), and an input pipe (73) provided at one end of the connecting pipe (72) located inside the sedimentation tank (5); and the conveying component (8) specifically comprises an outer cylinder (81) provided inside the sedimentation tank (5), an outer interface (82) provided outside the outer cylinder (81), a screw (83) provided inside the outer cylinder (81), a pumping motor (84) provided at the top of the outer cylinder (81), a discharge interface (85) provided between the sedimentation tank (5) and the fermentation tank (6), and a solid matter discharge pipe (86) provided inside the discharge interface (85); The sewage discharge pipe (3) is connected to the sedimentation tank (5), and the discharge pipe (4) is connected to the fermentation tank (6). The fermentation tank (6) is divided into four sections, wherein the first three sections are connected to the sedimentation tank (5) via a flow guide component (7), and the last section is connected to the sedimentation tank (5) via a transmission component (8). The installation height of the flow guide component (7) gradually increases in a direction away from the transmission component (8). The pumping motor (84) is connected to the screw (83), and the solid matter discharge pipe (86) is connected to the outer cylinder (81).

2. The rural domestic sewage treatment equipment according to claim 1 is characterized in that: The sedimentation tanks (5) are provided with two, which are respectively distributed on both sides of the fermentation tank (6).

3. The rural domestic sewage treatment equipment according to claim 2 is characterized in that: The top cover (2) comprises a sedimentation area cover (21) and a fermentation area cover (22), and the sedimentation area cover (21) and the fermentation area cover (22) respectively cover the sedimentation tank (5) and the fermentation tank (6).

4. The rural domestic sewage treatment equipment according to claim 3 is characterized in that: The flow guide assembly (7) further comprises a rotating joint (74) arranged between the connecting pipe (72) and the input pipe (73), a side mounting plate (75) arranged at one end of the input pipe (73) away from the connecting pipe (72), a positioning bolt (76) arranged on the surface of the side mounting plate (75), and a positioning hole (77) arranged on the inner wall of the sedimentation tank (5); The input tube (73) is rotatably connected to the rotating joint (74), the positioning bolt (76) is inserted into the positioning hole (77), and the positioning holes (77) are distributed in a ring array around the central axis of the rotating joint (74).

5. The rural domestic sewage treatment equipment according to claim 4 is characterized in that: The bottom surface of the sedimentation tank (5) is designed to be diagonally inclined, wherein the side close to the conveying component (8) is lower and the side close to the fermentation tank (6) is lower, and the conveying component (8) is located at the lowest corner of the bottom wall of the sedimentation tank (5).

6. The rural domestic sewage treatment equipment according to claim 5, characterized in that: The conveying assembly (8) further comprises a collecting tank (87) disposed on the bottom surface of the sedimentation tank (5), and the outer cylinder (81) is inserted into the collecting tank (87).

7. The rural domestic sewage treatment equipment according to claim 6 is characterized in that: A fermentation tank (10) is placed inside the fermentation tank (6), and the discharge pipe (4), the connecting pipe (72), and the solid matter discharge pipe (86) are all connected to the fermentation tank (10).

8. The rural domestic sewage treatment equipment according to claim 7 is characterized in that: An isolation assembly (9) is installed at one end of the flow guide assembly (7), and the isolation assembly (9) specifically comprises an external pipe (91) arranged at an end of the input pipe (73) away from the connecting pipe (72), and a filter screen cartridge (92) arranged at an end of the external pipe (91) away from the input pipe (73).

9. The rural domestic sewage treatment equipment according to claim 8, characterized in that: The isolation assembly (9) further comprises a placement platform (93) and a mounting frame (94) arranged inside the filter cylinder (92), a sliding shaft (95) arranged inside the filter cylinder (92) and the mounting frame (94), a top plate (96) arranged at an end of the sliding shaft (95) away from the external tube (91), a cleaning ring (97) arranged outside the filter cylinder (92), a connecting rod (98) arranged between the cleaning ring (97) and the top plate (96), a plastic ball (99) arranged at an end of the sliding shaft (95) close to the external tube (91), and an elastic member (910) arranged between the plastic ball (99) and the mounting frame (94); The sliding shaft (95) passes through the mounting frame (94) and the filter cylinder (92); the cleaning ring (97) is attached to the outer side of the filter cylinder (92); and the length of the connecting rod (98) is the same as that of the filter cylinder (92).

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