Domestic sewage purification tank

Abstract

The utility model discloses a domestic sewage purification tank which comprises a tank body used for purifying domestic sewage, shallow sunken parts which are sunken inwards at intervals are respectively arranged on the outer wall of the periphery of the tank body, and a plurality of outer side vertical convex edges and inner side vertical convex edges which are alternately distributed at intervals are formed on the inner side wall and the outer side wall of the tank body. Each outer side vertical rib is in a trapezoid shape which is gradually reduced from top to bottom, and each inner side vertical rib is in a trapezoid shape which is gradually increased from top to bottom. According to the utility model, the strength of the peripheral side walls of the tank body is increased, the anti-extrusion capability can be effectively improved, deformation or fracture caused by lateral extrusion of peripheral soil can be avoided, and the use safety is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of rural domestic sewage purification devices, specifically a domestic sewage purification tank. Background Technology

[0002] Rural domestic sewage typically originates from activities such as toilet flushing, washing, bathing, and kitchen use by rural residents. It is characterized by dispersed discharge, rapid fluctuations in temperature, and low but complex concentrations of pollutants. Untreated sewage can pollute water bodies and soil, threatening drinking water safety. Because many rural houses are self-built and scattered, it is often unsuitable to construct unified sewage treatment ponds. Therefore, small-scale, dedicated sewage treatment devices, known as sewage purification tanks, are usually built for each household. The main structure consists of a tank body and a cover that is fastened and fixed to the tank body, and is buried underground. For cost reasons, these sewage purification tanks mostly use corrosion-resistant and aging-resistant injection-molded parts and are filled with biological packing materials (such as polyurethane packing or combined packing), which can harbor a large number of functional microorganisms to form a biofilm. Through the metabolic activities of these microorganisms, pollutants in the sewage are decomposed.

[0003] As mentioned above, most domestic sewage purification tanks are injection molded parts and buried underground. Although they are corrosion-resistant and aging-resistant, their resistance to compression is significantly weaker than that of rigid concrete tanks. They are easily deformed or cracked by lateral compression from the surrounding soil, which can lead to leakage and pollution. Utility Model Content

[0004] The purpose of this invention is to overcome the defects and deficiencies of the existing technology and provide a domestic sewage purification tank to increase the strength of the side walls of the tank and improve its resistance to compression.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A domestic sewage purification tank includes a tank body for purifying domestic sewage, characterized in that: the outer walls of the tank body are respectively provided with shallow recesses that are recessed inward at intervals, and a plurality of alternating outer vertical convex ridges and inner vertical convex ridges are formed on the inner and outer walls of the tank body, each outer vertical convex ridge being a trapezoid that gradually decreases in size from top to bottom, and each inner vertical convex ridge being a trapezoid that gradually increases in size from top to bottom.

[0007] Furthermore, the cross-section of the groove is a trapezoid that gradually decreases in size from top to bottom.

[0008] Furthermore, each pair of adjacent sidewalls of the groove is integrally connected with a sloping transition section.

[0009] Furthermore, an annular lip is integrally connected around the upper port of the groove, which matches the periphery of the groove cover that is fastened to the groove.

[0010] Furthermore, the bottom surface of the annular lip is integrally connected to the outer wall of the upper port of the groove by a plurality of connecting ribs distributed at intervals along the circumference.

[0011] Furthermore, a grid is integrally connected to the inner bottom surface of the trough.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention features shallow, inwardly recessed portions spaced along the outer walls of the trough, thereby creating alternating outer and inner vertical ridges on the inner and outer walls of the trough. Each outer vertical ridge is a trapezoid that gradually decreases in size from top to bottom, while each inner vertical ridge is a trapezoid that gradually increases in size from top to bottom. This increases the strength of the trough's side walls, effectively enhancing its resistance to compression and preventing deformation or cracking due to lateral pressure from the surrounding soil, thus ensuring safe use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0016] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 . Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] See Figure 1-3 A domestic sewage purification tank includes a tank body 1 for purifying domestic sewage. The outer walls of the tank body 1 have shallow recesses 2 that are recessed inward at intervals. A number of alternating outer vertical ridges 3 and inner vertical ridges 4 are formed on the inner and outer walls of the tank body 1. Each outer vertical ridge 3 is a trapezoid that gradually decreases in size from top to bottom, and each inner vertical ridge 4 is a trapezoid that gradually increases in size from top to bottom.

[0019] In this invention, the cross-section of the trough 1 is a trapezoid that gradually decreases in size from top to bottom.

[0020] In this utility model, each pair of adjacent side walls of the trough 1 is integrally connected with a sloping transition portion 5.

[0021] In this invention, an annular lip 6 is integrally connected around the upper port of the groove 1, which matches the periphery of the groove cover (not shown in the figure) that is fastened to the groove 1.

[0022] Specifically, a number of through holes (not shown in the figure) are provided along the annular lip 6 and the four perimeter of the groove cover.

[0023] Insert bolts into the two corresponding through holes, screw on and tighten the nuts to fix the groove cover onto the groove body 1, thus achieving the fixation of the two.

[0024] In this invention, a number of connecting ribs 7 are integrally connected between the bottom surface of the annular lip 6 and the outer wall of the upper port of the groove 1, which are distributed circumferentially to improve strength and prevent deformation and cracking.

[0025] In this invention, a grid 8 is integrally connected to the inner bottom surface of the tank 1, which can improve the strength of the bottom of the tank 1 on the one hand, and provide filling space for biological fillers (such as polyurethane fillers and combined fillers) on the other hand.

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] In use, several of the domestic sewage purification tanks of this utility model can be used together, specifically including:

[0028] (1) Adjusting sedimentation tank: Adjusting water flow fluctuations and removing large particulate impurities through sedimentation.

[0029] (2) Anoxic tank: organic matter is removed and nitrogen is removed through denitrification.

[0030] (3) Aerobic tank: Utilizes nitrification to remove pollutants such as ammonia nitrogen.

[0031] (4) Outlet pool: Discharged or reused after disinfection.

[0032] Of course, partitions can also be used to divide the domestic sewage purification tank of this utility model into the aforementioned regulating sedimentation zone, anoxic zone, aerobic zone, and effluent zone.

[0033] After the utility model is buried underground, the shallow recesses 2 that are spaced outwards are provided on the outer walls of the tank 1. This forms alternating outer vertical ridges 3 and inner vertical ridges 4 on the inner and outer walls of the tank 1. Each outer vertical ridge 3 is a trapezoid that gradually decreases in size from top to bottom, and each inner vertical ridge 4 is a trapezoid that gradually increases in size from top to bottom. This increases the strength of the side walls of the tank 1, effectively improves its resistance to compression, and prevents deformation or cracking due to lateral compression from the surrounding soil. This also prevents leakage and pollution, ensuring safe use.

[0034] In addition, the cross-section of the tank 1 is designed as a trapezoid that gradually narrows from top to bottom, so as to resist a certain water pressure.

[0035] In addition, in this invention, a sloping transition portion 5 is integrally connected between each two adjacent side walls of the tank 1.

[0036] On the one hand, it can disperse lateral pressure: the inclined transition section 5 can disperse the lateral pressure of the soil on the trench 1, reduce stress concentration, and make the force more uniform. In contrast, traditional right-angle structures are prone to stress concentration points at the corners, which are prone to cracking under long-term soil compression.

[0037] On the other hand, it can reduce vertical impact: under the right angle structure, the vertical pressure of the soil acts directly on the corner of the trough 1, which is prone to local deformation. The inclined transition part 5 makes the soil pressure disperse along the inclined surface, reducing the stress intensity per unit area and further enhancing the compression resistance of the trough 1.

[0038] On the other hand, it can coordinate soil pressure: the sloping transition section 5 can avoid the "wedge effect" caused by soil compression in the right-angle structure, thus improving the overall stability.

[0039] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A domestic sewage purification tank, comprising a tank body for purifying domestic sewage, characterized in that: The outer walls of the trough have shallow recesses that are recessed inward at intervals. Several vertical convex ridges on the outer and inner sides of the trough are formed at intervals and are distributed alternately. Each outer vertical convex ridge is a trapezoid that gradually decreases in size from top to bottom, and each inner vertical convex ridge is a trapezoid that gradually increases in size from top to bottom.

2. The domestic sewage purification tank according to claim 1, characterized in that: The cross-section of the trough is a trapezoid that gradually decreases in size from top to bottom.

3. A domestic sewage purification tank according to claim 1 or 2, characterized in that: Each pair of adjacent sidewalls of the groove is integrally connected by a sloping transition section.

4. A domestic sewage purification tank according to claim 1, characterized in that: An annular lip is integrally connected around the upper port of the groove, which matches the periphery of the groove cover that is fastened to the groove body.

5. A domestic sewage purification tank according to claim 4, characterized in that: The bottom surface of the annular lip is integrally connected to the outer wall of the upper port of the groove by a number of connecting ribs distributed circumferentially.

6. A domestic sewage purification tank according to claim 1, characterized in that: The inner bottom surface of the trough is integrally connected with a grille.

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