Rural domestic sewage underground absorption equipment
By designing underground domestic sewage disposal equipment in rural areas with porous pipes and separation ring structures, combined with stainless steel filter sleeves and medium filler storage mechanisms, uniform purification and resource utilization of sewage are achieved, solving the problem that rural domestic sewage treatment is laborious and prone to point source pollution, and realizing efficient conversion of sewage resources.
Patent Information
- Application Number
- CN202510949544.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-09-26
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing method of resource utilization of rural domestic sewage is labor-intensive and prone to point source pollution, and cannot achieve centralized treatment and resource utilization.
An underground disposal device for rural domestic sewage was designed. It adopts a porous pipe and separation ring structure, combined with a stainless steel filter sleeve and a medium filler storage mechanism. Through partitioned filtration and modular design, it achieves uniform purification and resource utilization of sewage.
The uniform purification and resource utilization of sewage are achieved, and the N and P nutrients in the sewage are converted into soil. It is easy to maintain and the filler is easy to replace, avoiding the shortcomings of traditional clearing and watering.
Smart Images

Figure CN120698554A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of disposal equipment, and in particular to underground disposal equipment for rural domestic sewage. Background Art
[0002] Currently, urban domestic sewage is still mainly collected and treated, while rural areas cannot be collected and treated centrally due to their distance from cities and scattered populations. However, the core concept of rural domestic sewage treatment is still treatment, that is, treatment and discharge in compliance with standards. However, elements such as N and P are present in toilet sewage and domestic sewage, which are nutrients required for agricultural production and play an important role in improving soil nutrients. The existing technology has the following problems:
[0003] Because at present, the existing domestic sewage is used for resource utilization instead of traditional sewage treatment: traditional cleaning combined with manual or mechanical irrigation, but this method has many shortcomings, including being labor-intensive and prone to point source pollution. Summary of the Invention
[0004] The present invention provides an underground disposal device for rural domestic sewage to solve the problems raised in the above background technology.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0006] A rural domestic sewage underground disposal equipment, including a disposal mechanism and a septic tank, one side of the septic tank is fixedly connected to a sewage pipe that passes through its inner cavity, the disposal mechanism includes a porous pipe, one end of the sewage pipe is connected to one end of the porous pipe, the outer side of the porous pipe is sleeved with a disposal pipe, the disposal pipe is provided with a plurality of water-scattering holes that pass through the inside and outside, an external threaded ring is fixedly installed on the front side of the outer wall of the porous pipe, a limited sealing mechanism is provided on the rear side of the outer wall of the porous pipe, and four separation rings are evenly fixedly installed on the outer wall of the porous pipe between the external threaded ring and the limited sealing mechanism. An internal threaded mounting ring is fixedly installed on the front side of the inner ring of the disposal pipe, and a retaining ring is fixedly installed on the rear side of the outer wall of the external threaded ring. The internal threaded mounting ring is threadedly connected to the external threaded ring and stops after the rear side presses against the front side of the retaining ring. A plurality of sewage holes distributed front and back are evenly opened in an annular array on the outer wall of the porous pipe. Several sewage holes are evenly distributed between the limiting sealing mechanism and the separating ring, between the external threaded ring and the separating ring, and between two adjacent separating rings. A medium filler storage mechanism is provided between the limiting sealing mechanism and the separating ring, between the external threaded ring and the separating ring, and between two adjacent separating rings.
[0007] A further improvement of the technical solution of the present invention is that the limiting sealing mechanism includes a limiting ring, which is fixedly installed on the rear side of the outer wall of the porous pipe. An annular groove is provided on the rear side of the outer wall of the limiting ring, and an O-type rubber ring is sleeved on the inner side of the annular groove. The outer wall of the O-type rubber ring fits with the inner ring of the disposal pipe.
[0008] A further improvement of the technical solution of the present invention is that: an annular limiting groove is provided at the eccentric position on the front side of the limiting ring, a rubber ring is sleeved on the inner side of the annular limiting groove, and a limiting thin ring is fixedly installed on the rear side of the inner ring of the disposal tube, and the limiting thin ring is clamped with the annular limiting groove and presses against the front side of the rubber ring.
[0009] A further improvement of the technical solution of the present invention is that: the outer walls of the four separating rings are each provided with a sealing ring groove, the inner side of the sealing ring groove is sleeved with an O-ring, the thickness of the O-ring protruding from the outer wall of the separating ring is consistent with the thickness of the limiting thin ring, and the outer wall of the O-ring fits with the inner ring of the disposal tube.
[0010] A further improvement of the technical solution of the present invention is that the medium filler storage mechanism includes a stainless steel filter sleeve, the stainless steel filter sleeve is sleeved on the outer wall of the porous pipe, and the sewage discharge hole is located on the inner side of the stainless steel filter sleeve.
[0011] A further improvement of the technical solution of the present invention is that annular sealing plates are fixedly installed on the left and right sides of the outer wall of the stainless steel filter sleeve, a stainless steel filter outer cylinder and a stainless steel filter inner cylinder are fixedly installed between the opposite surfaces of the two annular sealing plates, the stainless steel filter inner cylinder is located between the stainless steel filter sleeve and the stainless steel filter outer cylinder, and the aperture of the stainless steel filter sleeve is larger than the stainless steel filter outer cylinder and the stainless steel filter inner cylinder.
[0012] A further improvement of the technical solution of the present invention is that the cavity between the stainless steel filter outer cylinder and the stainless steel filter inner cylinder is filled with highly adsorbent ceramsite, and the cavity between the stainless steel filter sleeve and the stainless steel filter inner cylinder is filled with porous zeolite.
[0013] A further improvement of the technical solution of the present invention is that: the outer wall of the stainless steel filter outer cylinder is provided with an outer cylinder unloading hole that penetrates to the cavity between the stainless steel filter inner cylinder, and an inner cylinder connecting pipe is fixedly connected between the stainless steel filter outer cylinder and the stainless steel filter inner cylinder, the top end of the inner cylinder connecting pipe penetrates to the outer wall of the stainless steel filter outer cylinder, and the other end of the inner cylinder connecting pipe penetrates to the cavity between the stainless steel filter inner cylinder and the stainless steel filter sleeve.
[0014] A further improvement of the technical solution of the present invention is that: the outer cylinder unloading hole and the inner ring of the inner cylinder connecting tube are both clamped with clamping plates, and the tops of the two clamping plates are fixedly installed with limiting top plates, and the left and right sides of the tops of the two limiting top plates are provided with pulling grooves, and the outer walls of the two clamping plates are fixedly bonded with rubber rings, and the diameter of the outer wall of the stainless steel filter outer cylinder after adding the limiting top plate is still smaller than the diameter of the separating ring.
[0015] Due to the adoption of the above technical solution, the present invention has the following technical advancements compared to the prior art:
[0016] 1. The present invention provides an underground disposal equipment for rural domestic sewage, which can evenly purify sewage through the modular partition design of the separation ring and the medium filler unit, and the disposal pipe can be disassembled as a whole by thread, which is convenient for maintenance.
[0017] 2. The present invention provides an underground disposal device for rural domestic sewage. It has a double-layer filtration structure, with the inner layer filled with porous zeolite to adsorb nutrients such as ammonia nitrogen and phosphorus, and the outer layer filled with highly adsorbable ceramsite to remove organic matter and heavy metals. The purified water slowly seeps into the soil through the water holes of the disposal pipe, so that the N and P nutrients in the sewage are converted and utilized by the soil, realizing resource utilization.
[0018] 3. The present invention provides an underground disposal device for rural domestic sewage. By designing a special unloading channel for the medium filler storage mechanism, the outer tube unloading hole is used to dump expanded clay, and the inner tube connecting pipe is used to dump zeolite. When replacing the filler, there is no need to destroy the overall structure, thereby realizing rapid replacement of the filling medium. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is an overall schematic diagram of the structure of the present invention;
[0020] Figure 2 A schematic diagram of the absorption mechanism of the structure of the present invention;
[0021] Figure 3 For the present invention Figure 2 Schematic diagram of location A in the middle;
[0022] Figure 4 A schematic diagram of a porous pipe structure of the present invention;
[0023] Figure 5 A schematic diagram of a separator ring of the structure of the present invention;
[0024] Figure 6 A schematic diagram of a medium filler storage mechanism of the present invention;
[0025] Figure 7 This is a schematic diagram of the disassembled state of the card structure of the present invention.
[0026] Figure: 1, disposal mechanism; 11, porous pipe; 111, drainage hole; 12, disposal pipe; 121, thin limiting ring; 13, internal thread mounting ring; 14, external thread ring; 15, retaining ring; 16, separating ring; 161, sealing ring groove; 162, O-ring; 17, limiting sealing mechanism; 171, limiting ring; 172, annular groove; 173, O-ring; 174, annular limiting ring Groove; 175, rubber ring; 18, medium filler storage mechanism; 181, stainless steel filter sleeve; 182, annular sealing plate; 183, stainless steel filter outer tube; 1831, outer tube unloading hole; 1832, inner tube connecting pipe; 1833, clamping plate; 1834, limiting top plate; 1835, pulling groove; 1836, rubber ring; 184, stainless steel filter inner tube; 2, septic tank; 21, sewage pipe. DETAILED DESCRIPTION
[0027] The present invention is described in further detail below in conjunction with the embodiments:
[0028] Example 1
[0029] like Figure 1-7 As shown, the present invention provides an underground disposal equipment for rural domestic sewage, including a disposal mechanism 1 and a septic tank 2. The septic tank 2 adopts an anti-frost heave structure, an insulation layer is arranged on the side wall, and a gravel infiltration layer with variable porosity is laid on the bottom. The applicable temperature range is -39°C to 45°C. The disposal mechanism 1 is pre-buried in the ground as a whole, and a sewage pipe 21 that passes through its inner cavity is fixedly connected to one side of the septic tank 2. The disposal mechanism 1 includes a porous pipe 11, one end of the sewage pipe 21 is connected to one end of the porous pipe 11, and a disposal pipe 12 is provided on the outer side of the porous pipe 11. The disposal pipe 12 has a plurality of water-scattering holes that pass through the inside and outside. An external threaded ring 14 is fixedly installed on the front side of the outer wall of the porous pipe 11, and a limited sealing mechanism 17 is arranged on the rear side of the outer wall of the porous pipe 11. The outer wall of the porous pipe 11 is located at the outer thread. Four separating rings 16 are evenly fixedly installed between the ring 14 and the limiting sealing mechanism 17, an internal thread mounting ring 13 is fixedly installed on the front side of the inner ring of the disposal pipe 12, and a retaining ring 15 is fixedly installed on the rear side of the outer wall of the external thread ring 14. The internal thread mounting ring 13 is threadedly connected to the external thread ring 14 and stops after the rear side is against the front side of the retaining ring 15. A plurality of drainage holes 111 distributed front and back are evenly opened in an annular array on the outer wall of the porous pipe 11. The plurality of drainage holes 111 are evenly distributed between the limiting sealing mechanism 17 and the separating ring 16, between the external thread ring 14 and the separating ring 16, and between two adjacent separating rings 16. A medium filler storage mechanism 18 is provided between the limiting sealing mechanism 17 and the separating ring 16, between the external thread ring 14 and the separating ring 16, and between two adjacent separating rings 16.
[0030] In this embodiment, when in use, the sewage decomposed in the septic tank 2 or the sewage generated by other sewage treatment equipment can enter the inner cavity of the porous pipe 11 through the sewage pipe 21 pre-buried in the ground, and evenly flow into the medium filler storage mechanism 18 between different separation rings 16 through the sewage hole 111 for filtration, and then flow into the soil through the water holes opened in the disposal pipe 12. At the same time, the partitioning of the four separation rings 16 can make the sewage more evenly purified and discharged. When it is necessary to replace the filler contained in the medium filler storage mechanism 18 in the inner cavity of the disposal pipe 12, it is only necessary to dismantle the disposal mechanism 1 as a whole by digging up the soil and then rotate the disposal pipe 12, so as to complete the disassembly by using the threaded connection between the internal thread mounting ring 13 and the external thread ring 14.
[0031] Example 2
[0032] like Figure 1-7 As shown, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the limiting sealing mechanism 17 includes a limiting ring 171, the limiting ring 171 is fixedly mounted on the rear side of the outer wall of the porous pipe 11, the outer wall rear side of the limiting ring 171 is provided with an annular groove 172, the inner side of the annular groove 172 is provided with an O-type rubber ring 173, the outer wall of the O-type rubber ring 173 is fitted with the inner ring of the waste pipe 12, the front side eccentricity of the limiting ring 171 is provided with an annular limiting groove 174, the annular limiting groove 174 is provided. A rubber ring 175 is sleeved on the inner side, and a limiting thin ring 121 is fixedly installed on the rear side of the inner ring of the disposal tube 12. The limiting thin ring 121 is clamped with the annular limiting groove 174 and presses against the front side of the rubber ring 175. The outer walls of the four separating rings 16 are all provided with sealing ring grooves 161. The inner side of the sealing ring groove 161 is sleeved with an O-ring 162. The thickness of the O-ring 162 protruding from the outer wall of the separating ring 16 is consistent with the thickness of the limiting thin ring 121, and the outer wall of the O-ring 162 fits with the inner ring of the disposal tube 12.
[0033] In this embodiment, when the disposal pipe 12 is pulled out, the entire disposal pipe 12 is smoothly pulled out and removed by rolling the O-ring 162 inside the sealing ring groove 161 opened by several separating rings 16. When installing, it is aligned with the external threaded ring 14 and inserted until the limiting thin ring 121 on the rear side of the inner ring of the disposal pipe 12 is inserted into the inner side of the annular limiting groove 174, and the O-ring 173 is used to squeeze the inner wall of the disposal pipe 12 and the limiting thin ring 121 is pressed against the rubber ring 175 to ensure sealing. At the same time, the O-ring 162 can also be used between two adjacent separating rings 16 to squeeze the inner wall of the disposal pipe 12 to ensure sealing, so that the sewage outflow purification process is more uniform. At the same time, when the disposal pipe 12 is pulled out, the thinner limiting thin ring 121 can squeeze the O-ring 162 and pull it out without forming an obstruction.
[0034] Example 3
[0035] like Figure 1-7As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the medium filler storage mechanism 18 includes a stainless steel filter sleeve 181, the stainless steel filter sleeve 181 is sleeved on the outer wall of the porous pipe 11, and the drain hole 111 is located on the inner side of the stainless steel filter sleeve 181, and annular sealing plates 182 are fixedly installed on the left and right sides of the outer wall of the stainless steel filter sleeve 181, and a stainless steel filter outer cylinder 183 and a stainless steel filter inner cylinder 184 are fixedly installed between the opposite surfaces of the two annular sealing plates 182, and the stainless steel filter inner cylinder 184 is located between the stainless steel filter sleeve 181 and the stainless steel filter outer cylinder 183. The aperture of the stainless steel filter sleeve 181 is larger than that of the stainless steel filter outer cylinder 183 and the stainless steel filter inner cylinder 184. The cavity between the stainless steel filter sleeve 181 and the stainless steel filter inner cylinder 184 is filled with highly adsorbent ceramsite, and the cavity between the stainless steel filter sleeve 181 and the stainless steel filter inner cylinder 184 is filled with porous zeolite.
[0036] In this embodiment, after passing through the sewage discharge hole 111, the sewage will flow into the cavity between the stainless steel filter inner tube 184 and the stainless steel filter sleeve 181 through the large-aperture stainless steel filter sleeve 181, and the porous zeolite inside it will be used to adsorb nutrients such as ammonia nitrogen and phosphorus in the sewage. Then, it will enter between the stainless steel filter inner tube 184 and the stainless steel filter outer tube 183, and the highly adsorbable ceramsite will be used to adsorb organic matter, heavy metals and residual impurities in the sewage. The purified water will slowly seep out through the water holes of the stainless steel filter outer tube 183 and the disposal pipe 12, and be absorbed and utilized by the surrounding soil. The nutrients such as N and P in the sewage will be converted by the soil, realizing resource utilization.
[0037] Example 4
[0038] like Figure 1-7 As shown, based on Example 1, the present invention provides a technical solution: preferably, the outer wall of the stainless steel filter outer cylinder 183 is provided with an outer cylinder discharge hole 1831 that penetrates to the cavity between the stainless steel filter inner cylinder 184, and an inner cylinder connecting pipe 1832 is fixedly connected between the stainless steel filter outer cylinder 183 and the stainless steel filter inner cylinder 184, the top end of the inner cylinder connecting pipe 1832 penetrates to the outer wall of the stainless steel filter outer cylinder 183, and the other end of the inner cylinder connecting pipe 1832 penetrates to the stainless steel filter inner cylinder 184 and the cavity between the stainless steel filter inner cylinder 184 and the cavity. The cavity between the stainless steel filter sleeve 181, the outer cylinder unloading hole 1831 and the inner circle of the inner cylinder connecting pipe 1832 are all clamped with a clamping plate 1833, and the tops of the two clamping plates 1833 are fixedly installed with a limiting top plate 1834. The tops of the two limiting top plates 1834 are provided with pulling grooves 1835 on the left and right sides. The outer walls of the two clamping plates 1833 are fixedly bonded with rubber rings 1836. The diameter of the outer wall of the stainless steel filter outer cylinder 183 after adding the limiting top plate 1834 is still smaller than the diameter of the separating ring 16.
[0039] In this embodiment, when the porous zeolite and high-adsorption ceramsite need to be replaced, it is only necessary to pull the limiting top plate 1834 upward with the help of the pulling groove 1835 after the overall medium filler storage mechanism 18 is exposed until the card plate 1833 that is engaged with the outer cylinder unloading hole 1831 and the inner side of the inner cylinder connecting pipe 1832 is pulled out, and then the medium filler storage mechanism 18 as a whole can be rotated and inverted on the outer wall of the porous pipe 11, so that the high-adsorption ceramsite between the stainless steel filter inner cylinder 184 and the stainless steel filter outer cylinder 183 can be poured out through the outer cylinder unloading hole 1831, and the porous zeolite between the stainless steel filter sleeve 181 and the stainless steel filter inner cylinder 184 can be poured out from the inner cylinder connecting pipe 1832. After the new filling medium is poured in, the two card plates 1833 can be respectively engaged and fixed, and the rubber ring 1836 can be used to ensure the sealing.
[0040] Let’s talk about the working principle of the underground rural domestic sewage disposal equipment in detail.
[0041] like Figure 1-7 As shown, domestic sewage enters the septic tank 2 for fermentation and precipitation, and solid waste decomposes into liquid. The liquid sewage flows into the porous pipe 11 through the sewage pipe 21, and evenly seeps out to the inner side of the stainless steel filter sleeve 181 through the sewage hole 111. The sewage penetrates the stainless steel filter sleeve 181 and enters the zeolite filling layer. The zeolite adsorbs nutrients such as ammonia nitrogen and phosphorus, and then the sewage continues to penetrate into the ceramsite filling layer. The ceramsite adsorbs organic matter, heavy metals and residual impurities. The purified water slowly seeps out through the stainless steel filter outer cylinder 183 and the water holes of the disposal pipe 12, and is absorbed and utilized by the surrounding soil. The nutrients such as N and P in the sewage are converted by the soil to realize resource utilization.
[0042] While the present invention has been generally described above, modifications and improvements are readily apparent to those skilled in the art. Therefore, modifications and improvements that do not depart from the spirit of the present invention are intended to be within the scope of the present invention.
Claims
1. An underground disposal device for rural domestic sewage, comprising a disposal mechanism (1) and a septic tank (2), characterized in that: One side of the septic tank (2) is fixedly connected with a sewage pipe (21) that passes through its inner cavity. The disposal mechanism (1) includes a porous pipe (11). One end of the sewage pipe (21) is connected to one end of the porous pipe (11). The outer side of the porous pipe (11) is provided with a disposal pipe (12). The disposal pipe (12) is provided with a plurality of water-scattering holes that pass through the inside and outside. An external threaded ring (14) is fixedly installed on the front side of the outer wall of the porous pipe (11). A limited sealing mechanism (17) is provided on the rear side of the outer wall of the porous pipe (11). Four separation rings (16) are evenly fixedly installed on the outer wall of the porous pipe (11) between the external threaded ring (14) and the limited sealing mechanism (17). An internal threaded mounting ring (14) is fixedly installed on the front side of the inner ring of the disposal pipe (12). The outer wall of the external threaded ring (14) is fixedly mounted with a retaining ring (15), the inner threaded mounting ring (13) is threadedly connected to the outer threaded ring (14) and stops after the rear side abuts against the front side of the retaining ring (15), the outer wall of the porous pipe (11) is evenly provided with a plurality of drainage holes (111) distributed front and back in an annular array, the plurality of drainage holes (111) are evenly distributed between the limiting sealing mechanism (17) and the separating ring (16), between the external threaded ring (14) and the separating ring (16), and between two adjacent separating rings (16), and a medium filling storage mechanism (18) is provided between the limiting sealing mechanism (17) and the separating ring (16), between the external threaded ring (14) and the separating ring (16), and between two adjacent separating rings (16).
2. The underground disposal equipment for rural domestic sewage according to claim 1, characterized in that: The limiting sealing mechanism (17) comprises a limiting ring (171), the limiting ring (171) is fixedly mounted on the rear side of the outer wall of the porous pipe (11), an annular groove (172) is provided on the rear side of the outer wall of the limiting ring (171), an O-type rubber ring (173) is sleeved on the inner side of the annular groove (172), and the outer wall of the O-type rubber ring (173) is in contact with the inner ring of the waste pipe (12).
3. The underground disposal equipment for rural domestic sewage according to claim 2, characterized in that: An annular limiting groove (174) is provided at an eccentric position on the front side of the limiting ring (171), a rubber ring (175) is sleeved on the inner side of the annular limiting groove (174), and a limiting thin ring (121) is fixedly installed on the rear side of the inner ring of the disposal tube (12), and the limiting thin ring (121) is engaged with the annular limiting groove (174) and abuts against the front side of the rubber ring (175).
4. The underground rural domestic sewage disposal equipment according to claim 3, characterized in that: The outer walls of the four separating rings (16) are each provided with a sealing ring groove (161), and an O-type sealing ring (162) is sleeved on the inner side of the sealing ring groove (161). The thickness of the O-type sealing ring (162) protruding from the outer wall of the separating ring (16) is consistent with the thickness of the limiting thin ring (121), and the outer wall of the O-type sealing ring (162) is in contact with the inner ring of the waste pipe (12).
5. The underground disposal equipment for rural domestic sewage according to claim 1, characterized in that: The medium filler storage mechanism (18) comprises a stainless steel filter sleeve (181), the stainless steel filter sleeve (181) is sleeved on the outer wall of the porous pipe (11), and the drain hole (111) is located on the inner side of the stainless steel filter sleeve (181).
6. The underground disposal equipment for rural domestic sewage according to claim 5, characterized in that: Annular sealing plates (182) are fixedly mounted on both left and right sides of the outer wall of the stainless steel filter sleeve (181); a stainless steel filter outer cylinder (183) and a stainless steel filter inner cylinder (184) are fixedly mounted between the opposing surfaces of the two annular sealing plates (182); the stainless steel filter inner cylinder (184) is located between the stainless steel filter sleeve (181) and the stainless steel filter outer cylinder (183); and the pore size of the stainless steel filter sleeve (181) is larger than that of the stainless steel filter outer cylinder (183) and the stainless steel filter inner cylinder (184).
7. The underground rural domestic sewage disposal equipment according to claim 6, characterized in that: The cavity between the stainless steel filter outer cylinder (183) and the stainless steel filter inner cylinder (184) is filled with highly adsorbent ceramsite, and the cavity between the stainless steel filter sleeve (181) and the stainless steel filter inner cylinder (184) is filled with porous zeolite.
8. The underground rural domestic sewage disposal equipment according to claim 6, characterized in that: The outer wall of the stainless steel filter outer cylinder (183) is provided with an outer cylinder discharge hole (1831) that penetrates to the cavity between the stainless steel filter inner cylinder (184), and an inner cylinder connecting pipe (1832) is fixedly connected between the stainless steel filter outer cylinder (183) and the stainless steel filter inner cylinder (184). The top end of the inner cylinder connecting pipe (1832) penetrates to the outer wall of the stainless steel filter outer cylinder (183), and the other end of the inner cylinder connecting pipe (1832) penetrates to the cavity between the stainless steel filter inner cylinder (184) and the stainless steel filter sleeve (181).
9. The underground rural domestic sewage disposal equipment according to claim 8, characterized in that: The outer cylinder discharge hole (1831) and the inner ring of the inner cylinder connecting tube (1832) are both clamped with a clamping plate (1833), and the tops of the two clamping plates (1833) are fixedly installed with a limiting top plate (1834), and the left and right sides of the tops of the two limiting top plates (1834) are provided with pulling grooves (1835), and the outer walls of the two clamping plates (1833) are fixedly bonded with rubber rings (1836). The diameter of the outer wall of the stainless steel filter outer cylinder (183) after adding the limiting top plate (1834) is still smaller than the diameter of the separation ring (16).