Sewage treatment tank

Abstract

The utility model provides a sewage treatment tank, which belongs to the field of sewage treatment devices and comprises a plurality of intermediate tanks which are sequentially connected from bottom to top. Each intermediate tank comprises an inner tank, an outer tank and a plurality of partition plates, the outer tank is arranged on the periphery of the inner tank in a sleeving mode, and the outer tank and the inner tank are connected through the partition plates; the inner tanks of the plurality of intermediate tanks are sequentially connected from bottom to top, and the outer tanks of the plurality of intermediate tanks are sequentially connected from bottom to top; in every two adjacent intermediate tanks, the multiple partition plates located on the upper portion are connected with the multiple partition plates located on the lower portion in a one-to-one correspondence mode, and the problem that in the prior art, a sewage treatment tank can only store one kind of liquid, and the function is single is solved. The sewage treatment tank structure has the technical effects that the occupied area of equipment is reduced, and meanwhile, the liquid storage space is diversified.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment device technical field especially, relates to a sewage treatment tank. BACKGROUND

[0002] Sewage treatment tank is the equipment specially used for treating sewage, plays an important role in modern society environmental protection and water resource recycling. The existing sewage treatment tank structure is mostly single tank body structure, can only store one kind of liquid, the function is relatively single, if need to carry out graded treatment to sewage need to set up multiple tank bodies, the space is occupied more. UTILITY MODEL CONTENTS

[0003] The utility model provides sewage treatment tank, to solve the defect that the sewage treatment tank in prior art can only store one kind of liquid, the function is relatively single, realizes the sewage treatment tank structure of liquid storage space diversification while reducing equipment land area.

[0004] The utility model provides a sewage treatment tank, including multiple intermediate tanks, multiple intermediate tanks are connected in turn from bottom to top;

[0005] Each intermediate tank includes inner tank, outer tank and multiple partition plates, the outer tank is sleeved on the outer periphery of the inner tank, and the outer tank is connected with the inner tank through multiple partition plates;

[0006] The inner tank of multiple intermediate tanks is connected in turn from bottom to top, and the outer tank of multiple intermediate tanks is connected in turn from bottom to top;

[0007] In the two intermediate tanks adjacent, multiple partition plates located at the upper and multiple partition plates located at the lower are connected one by one.

[0008] According to the sewage treatment tank of the utility model, the cooperation of multiple partition plates, inner tank and outer tank realizes that the treatment tank can form multiple liquid storage spaces, when needing to carry out graded treatment to sewage, using the treatment tank can realize liquid storage space diversification while reducing equipment land area, and installation construction efficiency is faster, in addition, the sewage treatment tank is relatively stable due to multiple partition plates between the inner tank and the corresponding outer tank.

[0009] In addition, according to the sewage treatment tank of the utility model, the following additional technical features can also be provided:

[0010] In some embodiments of the utility model, it also includes angle steel, and each partition plate and the corresponding inner tank and each partition plate and the corresponding outer tank are connected through angle steel.

[0011] By adopting the above embodiment, the setting of angle steel increases the reliability and convenience of the connection between the inner tank and the corresponding partition plate of the treatment tank and the connection between the outer tank and the corresponding partition plate, and further increases the stability of the treatment tank.

[0012] In some embodiments of the utility model, each inner tank includes inner cylinder and inner connecting ring, the top of inner cylinder is connected with inner connecting ring, the bottom of inner cylinder is provided with inner connecting groove;

[0013] The inner cylinder of each inner tank is connected with the outer cylinder of the corresponding outer tank through multiple partition plates;

[0014] In the adjacent two inner tanks, the inner connecting ring of one inner cylinder is inserted into the inner connecting groove of the other inner cylinder.

[0015] Through the above-mentioned embodiment, the setting of inner connecting ring and inner connecting groove increases the convenience of the connection of multiple inner tanks and guarantees the reliability of the connection of multiple inner tanks.

[0016] In some embodiments of the utility model, each outer tank includes outer cylinder and outer connecting ring, the top of outer cylinder is connected with outer connecting ring, the bottom of outer cylinder is provided with outer connecting groove;

[0017] The inner cylinder of each inner tank is connected with the outer cylinder of the corresponding outer tank through multiple partition plates;

[0018] In the adjacent two outer tanks, the outer connecting ring of one outer cylinder is inserted into the outer connecting groove of the other outer cylinder.

[0019] Through the above-mentioned embodiment, the setting of outer connecting ring and outer connecting groove increases the convenience of the connection of multiple outer tanks and guarantees the reliability of the connection of multiple outer tanks.

[0020] In some embodiments of the utility model, it also includes liquid passing pipe, the inner tank at the top and the inner tank in the inside are all connected with liquid passing pipe, and one end of each liquid passing pipe away from the corresponding inner tank passes through the corresponding outer tank and communicates with the outside.

[0021] In some embodiments of the utility model, the outer tank at the top and the outer tank at the bottom are all provided with first through hole, and the liquid passing pipe passes through the first through hole and communicates with the outside one by one.

[0022] Through the above-mentioned embodiment, the setting of liquid passing pipe realizes the reliable discharge of liquid in the tank body structure formed by the connection of multiple inner tanks or the rapid injection of corresponding liquid into the tank body structure formed by the connection of multiple inner tanks.

[0023] In some embodiments of the utility model, the outer tank at the top and the outer tank at the bottom are all provided with multiple second through holes, and one second through hole is arranged between each adjacent two partition plates.

[0024] By adopting the above-mentioned embodiment, the setting of the second via hole realizes the rapid and reliable inflow and outflow of the liquid in the multiple liquid storage spaces formed by the combination of the multiple partitions, the multiple outer tanks and the multiple inner tanks.

[0025] In some embodiments of the utility model, still include top cover and bottom cover, the intermediate tank of top is connected with top cover, the intermediate tank of bottom is connected with bottom cover.

[0026] By adopting the above-mentioned embodiment, the setting of the top cover and the bottom cover increases the sealing property and the reliability of use of the present treatment tank.

[0027] In some embodiments of the utility model, bottom cover includes bottom plate and bottom ring, bottom ring is inserted on the outer tank of bottom, bottom plate is connected with the outer tank of bottom through bottom ring, the inner tank of bottom and the outer tank of bottom all abut with bottom plate.

[0028] By adopting the above-mentioned embodiment, the setting of the bottom ring increases the convenience of the connection of the bottom cover and the outer tank of bottom.

[0029] In some embodiments of the utility model, top cover includes top plate and top ring, top ring is sleeved on the outer tank of top, top plate is connected with the outer tank of top through top ring, the inner tank of top and the outer tank of top all abut with top plate.

[0030] By adopting the above-mentioned embodiment, the setting of the top ring increases the convenience of the connection of the top cover and the outer tank of top.

[0031] In conclusion, the present application has the following beneficial technical effects: through the cooperation of the multiple partitions, the inner tank and the outer tank, the present treatment tank can form multiple liquid storage spaces, when the sewage needs to be treated in stages, using the present treatment tank can realize the reduction of equipment floor area while realizing the diversification of liquid storage space, the installation and construction efficiency is relatively fast, in addition, the sewage treatment tank is relatively stable in structure due to the multiple partitions arranged between the inner tank and the corresponding outer tank. BRIEF DESCRIPTION OF DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in any respect. In the drawings:

[0033] Figure 1 A perspective view of a sewage treatment tank according to some embodiments of the present utility model is schematically shown.

[0034] Figure 2A perspective view of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0035] Figure 3 A perspective view of a middle tank of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0036] Figure 4 A perspective view of a middle tank of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0037] Figure 5 A perspective view of an outer tank of a middle tank of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0038] Figure 6 A perspective view of an inner tank of a middle tank of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0039] Figure 7 A perspective view of an outer tank of a middle tank of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0040] Figure 8 A perspective view of an inner tank of a middle tank of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0041] Figure 9 A perspective view of a top cover of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0042] Figure 10 A perspective view of a bottom cover of a sewage treatment tank according to some embodiments of the present application is shown schematically.

[0043] Reference signs:

[0044] 1, top cover, 11, top plate, 12, top ring, 2, middle tank, 21, outer tank, 211, outer cylinder, 212, outer connecting ring, 213, outer connecting groove, 22, inner tank, 221, inner cylinder, 222, inner connecting ring, 223, inner connecting groove, 3, bottom cover, 31, bottom plate, 32, bottom ring, 4, liquid passing pipe, 41, first through hole, 5, partition plate, 6, first angle steel, 7, second angle steel, 8, connecting hole, 9, second through hole. DETAILED DESCRIPTION

[0045] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present disclosure to not only those skilled in the art, but also as an enabling teach of at least one implementation to others.

[0046] It is to be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0047] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0048] For the purposes of the description, relative terms of orientation such as "inner", "outer", "interior", "exterior", "lower", "bottom", "upper", "top", and the like can be used to describe an element or feature as shown in the figures in relation to another element or feature. Such relative terms of orientation are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "below" or "beneath" the other element or feature would then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.

[0049] As Figures 1 to 10 shown, according to the embodiments of the first aspect of the present application, a sewage treatment tank is provided, comprising a plurality of intermediate tanks 2, the plurality of intermediate tanks 2 are sequentially connected from bottom to top;

[0050] Each intermediate tank 2 comprises an inner tank 22, an outer tank 21 and a plurality of partitions 5, the outer tank 21 is sleeved on the outer periphery of the inner tank 22, and the outer tank 21 and the inner tank 22 are connected through the plurality of partitions 5;

[0051] The inner tanks 22 of the plurality of intermediate tanks 2 are sequentially connected from bottom to top, and the outer tanks 21 of the plurality of intermediate tanks 2 are sequentially connected from bottom to top;

[0052] Among the two adjacent intermediate tanks 2, the plurality of partitions 5 located above are connected one by one with the plurality of partitions 5 located below.

[0053] In the above embodiments, it should be noted that the two adjacent inner tanks 22 and the two adjacent outer tanks 22 are both sealed, and the plurality of partitions 5 located above are sealed after being connected one by one with the plurality of partitions 5 located below, and the sealing is performed between each partition 5 and the corresponding inner tank 21 and between each partition 5 and the corresponding outer tank 22.

[0054] The above embodiments achieve the following technical effects: through the cooperation of the plurality of partitions 5, the inner tank 21 and the outer tank 22, the present treatment tank can form a plurality of liquid storage spaces, when the sewage needs to be treated in stages, the present treatment tank can be used to realize the diversification of the liquid storage space while reducing the equipment floor area, and the installation and construction efficiency is relatively fast, in addition, the present sewage treatment tank is relatively stable in structure due to the plurality of partitions 5 between the inner tank 21 and the corresponding outer tank 22.

[0055] Optionally, as Figures 2 to 4As shown, the treatment tank further comprises angle steels, each of the partition plates 5 and the corresponding inner tank 22 is connected through an angle steel, and each of the partition plates 5 and the corresponding outer tank 21 is connected through an angle steel.

[0056] In the above optional embodiment, it should be noted that the angle steels are divided into first angle steels 6 and second angle steels 7, each of the partition plates 5 and the corresponding inner tank 22 is connected through at least one first angle steel 6, and each of the partition plates 5 and the corresponding outer tank 21 is connected through a second angle steel 7.

[0057] The above optional embodiment has the beneficial effect that the connection reliability and convenience between the inner tank 21 and the corresponding partition plate 5 and between the outer tank 22 and the corresponding partition plate 5 of the treatment tank are increased through the arrangement of the angle steels, thereby increasing the stability of the treatment tank.

[0058] Optionally, as shown in the drawings, each of the inner tanks 22 comprises an inner cylinder 221 and an inner connecting ring 222, the top of the inner cylinder 221 is connected with the inner connecting ring 222, and the bottom of the inner cylinder 221 is provided with an inner connecting groove 223. Figures 2 to 8

[0059] The inner cylinder 221 of each of the inner tanks 22 is connected with the corresponding outer tank 21 through a plurality of partition plates 5.

[0060] In the adjacent two inner tanks 22, the inner connecting ring 222 of one of the inner cylinders 221 is inserted into the inner connecting groove 223 of the other inner cylinder 221.

[0061] In the above optional embodiment, it should be noted that a plurality of connecting holes 8 are formed on each of the inner connecting rings 222, and a plurality of connecting holes 8 are formed on the side wall of each of the inner connecting grooves 223, and each of the inner connecting rings 222 and the side wall of the corresponding inner connecting groove 223 is connected through a bolt passing through the corresponding connecting hole 8.

[0062] The above optional embodiment has the beneficial effect that the convenience of the sequential connection of the plurality of inner tanks 22 is increased while the reliability of the sequential connection of the plurality of inner tanks 22 is ensured through the arrangement of the inner connecting ring 222 and the inner connecting groove 223.

[0063] Optionally, as shown in the drawings, each of the outer tanks 21 comprises an outer cylinder 211 and an outer connecting ring 212, the top of the outer cylinder 211 is connected with the outer connecting ring 212, and the bottom of the outer cylinder 211 is provided with an outer connecting groove 213. Figures 2 to 8

[0064] The inner cylinder 221 of each of the inner tanks 22 is connected with the outer cylinder 211 of the corresponding outer tank 21 through a plurality of partition plates 5.

[0065] In the adjacent two outer tanks 21, the outer connecting ring 212 of one of the outer cylinders 211 is inserted into the outer connecting groove 213 of the other outer cylinder 211.​​

[0066] It should be noted that in the above optional embodiment, a plurality of connecting holes 8 are formed on each outer connecting ring 212, and a plurality of connecting holes 8 are formed on the side wall of each outer connecting groove 213. Each outer connecting ring 212 is connected to the side wall of the corresponding outer connecting groove 213 by passing through the corresponding connecting hole 8 through a bolt.

[0067] The beneficial effect of the above optional embodiment is that the convenience of the sequential connection of the plurality of outer tanks 21 is increased while the reliability of the sequential connection of the plurality of outer tanks 21 is ensured by the arrangement of the outer connecting ring 212 and the outer connecting groove 213.

[0068] Optionally, as shown in Figures 1 to 3 , Figure 5 and Figure 6 , it further comprises a liquid passing pipe 4, and the inner tank 22 located at the top and the inner tank 22 located inside are both connected with the liquid passing pipe 4. The end of each liquid passing pipe 4 away from the corresponding inner tank 22 passes through the corresponding outer tank 21 to communicate with the outside; the outer tank 21 located at the top and the outer tank 21 located at the bottom are both provided with a first through hole 41, and the liquid passing pipe 4 passes through the first through hole 41 one by one to communicate with the outside.

[0069] It should be noted that in the above optional embodiment, each liquid passing pipe 4 communicates with the inside of the corresponding inner tank 22.

[0070] The beneficial effect of the above optional embodiment is that the liquid in the tank body structure formed by the connection of the plurality of inner tanks 22 can be reliably discharged or quickly injected into the corresponding liquid in the tank body structure formed by the connection of the plurality of inner tanks 22.

[0071] Optionally, as shown in Figures 1 to 3 , Figure 5 and Figure 6 , the outer tank 21 located at the top and the outer tank 21 located at the bottom are both provided with a plurality of second through holes 9, and one second through hole 9 is arranged between each adjacent two partitions 5.

[0072] The beneficial effect of the above optional embodiment is that the liquid in the plurality of liquid storage spaces formed by the combination of the plurality of partitions 5, the plurality of outer tanks 21 and the plurality of inner tanks 22 can be quickly and reliably flowed in and out.

[0073] Optionally, as shown in Figure 1 , Figure 9 and Figure 10 , it further comprises a top cover 1 and a bottom cover 3, and the intermediate tank 2 located at the top is connected with the top cover 1, and the intermediate tank 2 located at the bottom is connected with the bottom cover 3.

[0074] In the optional embodiment, it is to be explained that the middle tank 2 at the top is sealed after being connected with the top cover 1, and the middle tank 2 at the bottom is sealed after being connected with the bottom cover 3.

[0075] The optional embodiment has the beneficial effect of increasing the sealing performance and reliability of use of the processing tank through the provision of the top cover 1 and the bottom cover 3.

[0076] Optionally, as shown in Figure 1 and Figure 9 , the bottom cover 3 comprises a bottom plate 31 and a bottom ring 32, the bottom ring 32 is inserted on the outer tank 21 at the bottom, the bottom plate 31 is connected with the outer tank 21 at the bottom through the bottom ring 32, and the inner tank 22 at the bottom and the outer tank 21 at the bottom are both in abutment with the bottom plate 31.

[0077] In the optional embodiment, it is to be explained that the bottom ring 32 is inserted on the outer connecting groove 213 of the outer tank 21 at the bottom, a plurality of connecting holes 8 are formed on the bottom ring 32, the bottom ring 32 is connected with the side wall of the outer connecting groove 213 of the outer tank 21 at the bottom through the bolts passing through the corresponding connecting holes 8, and the inner tank 22 at the bottom and the outer tank 21 at the bottom are both sealed after being in abutment with the bottom plate 31.

[0078] The optional embodiment has the beneficial effect of increasing the convenience of connection of the bottom cover 3 with the outer tank 21 at the bottom through the provision of the bottom ring 32.

[0079] Optionally, as shown in Figure 1 and Figure 10 , the top cover 1 comprises a top plate 11 and a top ring 12, the top ring 12 is sleeved on the outer tank 21 at the top, the top plate 11 is connected with the outer tank 21 at the top through the top ring 12, and the inner tank 22 at the top and the outer tank 21 at the top are both in abutment with the top plate 11.

[0080] In the optional embodiment, it is to be explained that the top ring 12 is sleeved on the outer connecting ring 212 of the outer tank 21 at the top, a plurality of connecting holes 8 are formed on the top ring 12, the top ring 12 is connected with the side wall of the outer connecting groove 213 of the outer tank 21 at the top through the bolts passing through the corresponding connecting holes 8, and the inner tank 22 at the top and the outer tank 21 at the top are both sealed after being in abutment with the top plate 11.

[0081] The optional embodiment has the beneficial effect of increasing the convenience of connection of the top cover 3 with the outer tank 21 at the top through the provision of the top ring 12.

[0082] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sewage treatment tank characterised in that, The intermediate tank (2) comprises an inner tank (22), an outer tank (21) and a plurality of partition plates (5), the outer tank (21) is sleeved on the outer periphery of the inner tank (22), and the outer tank (21) and the inner tank (22) are connected through a plurality of partition plates (5). The inner tank (22) of the plurality of intermediate tanks (2) are sequentially connected from bottom to top, and the outer tank (21) of the plurality of intermediate tanks (2) are sequentially connected from bottom to top. In the two adjacent intermediate tanks (2), the plurality of upper partition plates (5) are connected with the plurality of lower partition plates (5) one by one. The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223).

2. The septic tank according to claim 1, characterized in that The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5).

3. The sewage treatment tank of claim 2, wherein, In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221). The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213). The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5).

4. The sewage treatment tank of claim 3, wherein In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove (213) of the other outer cylinder (211). The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223). The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5).

5. The sewage treatment tank according to any one of claims 1 to 4, characterized in that In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221).

6. The sewage treatment tank of claim 5, wherein, The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213).

7. The septic tank of claim 1, wherein The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5).

8. The sewage treatment tank according to any one of claims 1 to 4, characterized in that In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove (213) of the other outer cylinder (211). The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223). The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5). In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221). The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213). The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5). In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove (213) of the other outer cylinder (211). The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223). The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5). In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221). The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213). The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5). In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove (213) of the other outer cylinder (211). The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223). The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5). In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221). The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213). The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5). In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove (213) of the other outer cylinder (211). The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223). The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5). In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221). The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213). The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5). In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove (213) of the other outer cylinder (211). The inner tank (22) comprises an inner cylinder (221) and an inner connecting ring (222), the top of the inner cylinder (221) is connected with the inner connecting ring (222), and the bottom of the inner cylinder (221) is provided with an inner connecting groove (223). The inner cylinder (221) of each inner tank (22) is connected with the outer tank (21) through a plurality of partition plates (5). In the two adjacent inner tanks (22), the inner connecting ring (222) of one inner cylinder (221) is inserted into the inner connecting groove (223) of the other inner cylinder (221). The outer tank (21) comprises an outer cylinder (211) and an outer connecting ring (212), the top of the outer cylinder (211) is connected with the outer connecting ring (212), and the bottom of the outer cylinder (211) is provided with an outer connecting groove (213). The inner cylinder (221) of each inner tank (22) is connected with the outer cylinder (211) of the corresponding outer tank (21) through a plurality of partition plates (5). In the two adjacent outer tanks (21), the outer connecting ring (212) of one outer cylinder (211) is inserted into the outer connecting groove 9. The sewage treatment tank of claim 8, wherein, The bottom cover (3) comprises a bottom plate (31) and a bottom ring (32), the bottom ring (32) is inserted on the bottom outer tank (21), the bottom plate (31) is connected with the bottom outer tank (21) through the bottom ring (32), the bottom inner tank (22) and the bottom outer tank (21) are in abutment with the bottom plate (31).

10. The septic tank of claim 8, wherein, The top cover (1) comprises a top plate (11) and a top ring (12), the top ring (12) is sleeved on the top outer tank (21), the top plate (11) is connected with the top outer tank (21) through the top ring (12), the top inner tank (22) and the top outer tank (21) are in abutment with the top plate (11).

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