An assembled sewage treatment tank

Abstract

The present invention relates to the technical field of sewage treatment tank bodies, and in particular to an assembled sewage treatment tank body. It comprises: a plurality of columns, a plurality of corrugated plates are arranged between two adjacent columns, the corrugated plates include a top column, the top column is fixedly connected to two side columns, the two side columns are commonly fixedly connected to a bottom column, the top column is fixedly connected to a baffle, the side columns and the bottom column are both fixedly connected to the baffle, and the top column is fixedly connected to a mounting block; a limiting block is slidably connected to the adjacent mounting block, and the limiting block is used to limit the adjacent bottom column. The present invention limits the top column and the bottom column on the lower side by the limiting block, thereby realizing the pre-connection between the upper and lower corrugated plates, so as to facilitate the subsequent bolt reinforcement between the two corrugated plates, without the need to support the upper corrugated plate, making the assembly of the device more convenient and shortening the installation time of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment tanks, and in particular to an assembled sewage treatment tank. Background Art

[0002] An assembled sewage treatment tank is a prefabricated structure that is manufactured in a factory according to specific designs and standards, and then transported to the construction site for assembly. This type of treatment tank is usually used for the collection, storage and preliminary treatment of sewage or wastewater. Assembled sewage treatment tanks are suitable for a variety of occasions, including but not limited to residential areas, commercial buildings, industrial parks, rural areas, and temporary or emergency sewage treatment needs. In addition, they can also integrate other sewage treatment technologies, such as biological treatment, chemical treatment or physical treatment units, to achieve more comprehensive and effective sewage treatment effects.

[0003] When assembling existing prefabricated sewage treatment tanks, the base is first installed, followed by several columns, and then several corrugated panels are installed between adjacent columns. The panels are installed from bottom to top, but when installing the upper corrugated panels, they need to be supported to facilitate the bolt connection between the upper and lower corrugated panels. This makes the assembly of existing prefabricated sewage treatment tanks time-consuming and labor-intensive, resulting in low assembly efficiency. In addition, after the existing prefabricated water tanks are installed and connected, the entire tank body is insufficiently strong and easily deformed, resulting in water leakage, which affects the performance. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides an assembled sewage treatment tank body.

[0005] The technical solution of the present invention is: an assembled sewage treatment tank body, comprising:

[0006] There are a plurality of upright posts, the upright posts are distributed in a rectangular shape, the upright posts are provided with reinforcing ribs, a plurality of corrugated plates are provided between two adjacent upright posts, the corrugated plates include a top post, the top post is fixedly connected to two side posts, the two side posts are commonly fixedly connected to a bottom post, the top post is fixedly connected to a baffle, the side posts and the bottom post are both fixedly connected to the baffle, and the top post is fixedly connected to a plurality of mounting blocks;

[0007] The number of the limiting blocks is the same as that of the mounting blocks. The limiting blocks are slidably connected to the adjacent mounting blocks. A first spring is provided between the limiting blocks and the mounting blocks. The limiting blocks are used to limit the adjacent base columns.

[0008] Furthermore, the baffle is provided with a plurality of concave-convex ribs for improving the strength of the baffle. The concave-convex ribs include segmented and continuous types, and the forms of a single concave-convex rib include U-shape and V-shape.

[0009] Furthermore, it also includes:

[0010] The number of the sliding members is the same as the number of the mounting blocks. The sliding members are slidably connected to the adjacent mounting blocks, and the sliding members are fixedly connected to the adjacent limiting blocks.

[0011] Furthermore, it also includes:

[0012] The number of the limiting columns is consistent with the number of the mounting blocks. The limiting columns are slidably connected to the adjacent mounting blocks. A second spring is provided between the limiting columns and the mounting blocks. The limiting blocks are provided with grooves. The limiting columns are used to limit the limiting blocks through the grooves on the limiting blocks.

[0013] Furthermore, the top column is provided with a plurality of first waterstop lines, and the bottom column is provided with a plurality of second waterstop lines. Rubber strips are provided at the first waterstop lines and the second waterstop lines for sealing between the top column and the bottom column.

[0014] Furthermore, it also includes:

[0015] There are several sliding rings, and the base column is provided with several first sliding grooves. The sliding ring is slidably connected to the adjacent first sliding grooves. A tension spring is provided between the sliding ring and the base column. The base column is provided with several second sliding grooves. The number of the second sliding grooves is consistent with the number of the first sliding grooves. The second sliding grooves are connected to the adjacent first sliding grooves.

[0016] Furthermore, it also includes:

[0017] The number of the first sliding plates is the same as the number of the second sliding grooves, and the first sliding plates are slidably connected to adjacent second sliding grooves.

[0018] Furthermore, it also includes:

[0019] The first tie bars have several groups, each group has two first tie bars, and the two opposite corrugated plates form a group. Each group of the first tie bars is hinged to one of the two groups of corrugated plates located on the same layer. The first tie bars are fixedly connected to several second tie bars, and the second tie bars are hinged to the adjacent bottom columns.

[0020] Furthermore, it also includes:

[0021] Shells, the number of which is half the number of the first tie bars, the shells being fixedly connected to one of the first tie bars in the same group, and the other first tie bar being slidably connected to the shells;

[0022] The number of the second sliding plates is consistent with that of the shells. The shells are provided with first cavities. The second sliding plates are slidably connected to the adjacent first cavities. The second sliding plates are fixed to the adjacent first reinforcements.

[0023] Furthermore, it also includes:

[0024] The number of the third sliding plates is the same as that of the shell. The shell is provided with a second cavity. The third sliding plates are slidably connected in the adjacent second cavity. The second cavity is communicated with the adjacent first cavity.

[0025] In the present invention, the corrugated board may be in a wave shape or a trapezoidal shape, and the corrugated board is integrally formed.

[0026] In the present invention, the tank body and the base are connected by bolts, and the base is welded to the steel plate or directly poured with concrete.

[0027] In the present invention, the top of the pool body is generally open, and if deodorization is required, an arc-shaped plate is added to seal the top.

[0028] In the present invention, upper and lower adjacent top columns and bottom columns may be directly connected by bolts, or may be connected by bolts in conjunction with an adjustment mechanism.

[0029] In the present invention, multiple first waterstop lines and multiple second waterstop lines can be provided.

[0030] In the present invention, according to actual process requirements, the boxes can be assembled horizontally and vertically to form a larger box.

[0031] The beneficial effects of adopting the above technical solution are as follows: the present invention limits the top column and the bottom column on the lower side through the limit block, thereby realizing the pre-connection between the upper and lower corrugated plates, so as to facilitate the subsequent bolt reinforcement between the two corrugated plates, without the need to support the upper corrugated plate, making the assembly of the device more convenient and shortening the installation time of the device.

[0032] By providing a plurality of concave and convex ribs on the baffle, the structural strength of the baffle is enhanced so that the baffle can withstand greater water pressure, thereby enabling the baffle to have higher structural strength when the same amount of raw materials is used.

[0033] By allowing water pressure to act on the first sliding plate, the pressure between the top column and the upper bottom column of the first sliding plate is changed, thereby adjusting the sealing effect between the top column and the upper bottom column according to the water pressure, while ensuring the sealing, reducing the pressure on the rubber strip, thereby extending the service life of the rubber strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 Schematic diagram of the three-dimensional structure of the corrugated board of the present invention Figure 1 ;

[0036] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0037] Figure 4 This is a schematic diagram of the three-dimensional structure of the mounting block and the limiting block of the present invention;

[0038] Figure 5 It is a sectional view of the three-dimensional structure of the top column and the bottom column of the present invention;

[0039] Figure 6 Schematic diagram of the three-dimensional structure of the first water stop line and the second water stop line of the present invention Figure 1 ;

[0040] Figure 7 Schematic diagram of the three-dimensional structure of the first and second tie bars of the present invention;

[0041] Figure 8 Schematic diagram of the three-dimensional structure of the second sliding plate and the third sliding plate of the present invention;

[0042] Figure 9 Schematic diagram of the three-dimensional structure of the corrugated board of the present invention Figure 2 ;

[0043] Figure 10 Schematic diagram of the three-dimensional structure of the first water stop line and the second water stop line of the present invention Figure 2 .

[0044] Figure numbers: 1-column, 2-reinforcement rib, 3-corrugated plate, 31-top column, 311-first water stop, 32-side column, 33-bottom column, 331-second water stop, 332-first slide, 333-second slide, 34-baffle, 341-concave and convex rib, 4-mounting block, 5-limiting block, 6-sliding member, 7-limiting column, 8-sliding ring, 9-first sliding plate, 10-first tensioning rib, 11-second tensioning rib, 12-shell, 121-first cavity, 122-second cavity, 13-second sliding plate, 14-third sliding plate, 15-convex rib. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the attached drawings are not included in the scope of protection of the present invention. Figure 1The device is shown in the inverted state in the figure to facilitate display of the internal parts of the device. When actually using the device, just turn the device upside down. Example 1

[0046] An assembled sewage treatment tank body, such as Figure 1-Figure 5 As shown, it includes a plurality of upright posts 1, which are arranged in a rectangular shape. The upright posts 1 are provided with reinforcing ribs 2. A plurality of corrugated boards 3 are provided between two adjacent upright posts 1. The corrugated boards 3 include a top post 31, which is fixedly connected to two side posts 32, which are fixedly provided with a bottom post 33. The top post 31 is fixedly connected to a baffle 34. The side posts 32 and the bottom posts 33 are both fixedly connected to the baffle 34. The top post 31 is fixedly connected to a plurality of mounting blocks 4; the number of limit blocks 5 is the same as the number of mounting blocks 4, and the limit blocks 5 are slidably connected to adjacent mounting blocks 4. A first spring is provided between the limit blocks 5 and the mounting blocks 4, and the limit blocks 5 are used to limit the adjacent bottom posts 33. The baffle 34 is provided with a plurality of concave and convex ribs 341 to increase the strength of the baffle 34.

[0047] In the above scheme, the goal is to pre-connect two adjacent corrugated panels 3 to speed up assembly of the device. The illustration shows two corrugated panels 3 between two adjacent columns 1 for reference. In practice, the number of corrugated panels 3 can be adjusted as needed. Evenly distributed ribs are provided within the base column 33 to enhance its compressive strength. The side columns 32 are constructed of steel plates for support. The concave and convex ribs 341 on the baffle 34 are segmented.

[0048] Further, such as Figure 3-Figure 5 As shown, it also includes: sliding members 6, the number of which is consistent with the number of mounting blocks 4, the sliding members 6 are slidably connected to adjacent mounting blocks 4, and the sliding members 6 are fixedly connected to adjacent limiting blocks 5.

[0049] In the above solution, the limiting block 5 is intended to release the limiting effect on the adjacent top column 31 and the adjacent bottom column 33. The sliding member 6 is composed of a round rod and a disc, and the adjacent limiting block 5 is moved by pulling the sliding member 6.

[0050] Further, such as Figure 4 and Figure 5 As shown, it also includes: limiting columns 7, the number of which is consistent with the number of mounting blocks 4, the limiting columns 7 are slidably connected to the adjacent mounting blocks 4, a second spring is arranged between the limiting columns 7 and the mounting blocks 4, the limiting blocks 5 are provided with grooves, and the limiting columns 7 are used to limit the limiting blocks 5 through the grooves on the limiting blocks.

[0051] In the above scheme, the position of the limit block 5 is fixed to facilitate disassembly of the device. The limit post 7 is composed of a round rod and a hemisphere. The second spring between the limit post 7 and the mounting block 4 is initially compressed to push the limit post 7 into the groove of the limit block 5. The elastic coefficient of the second spring between the limit post 7 and the mounting block 4 is greater than the elastic coefficient of the first spring between the limit block 5 and the mounting block 4.

[0052] When the top post 31 is fitted with the bottom post 33 on the upper side, the limit block 5 is reset under the action of the adjacent first spring, thereby connecting the top post 31 with the bottom post 33 on the upper side. At this time, the pre-fixation of the corrugated board 3 is completed, and then bolts or the like can be used to connect the two adjacent corrugated boards 3 and the corrugated board 3 and the two adjacent columns 1, thereby realizing the rapid assembly of the device.

[0053] When disassembling the device, first drain the sewage in the device, then remove the bolts on the corrugated board 3, and then pull the sliding member 6, which drives the adjacent limit block 5 to move. At this time, the distance the limit block 5 moves is farther than the distance when the bottom column 33 squeezes it to move, so that the groove on the limit block 5 is aligned with the adjacent limit column 7, and the limit column 7 is inserted into it under the action of the adjacent second spring, thereby limiting the limit block 5. When the limit blocks 5 on one corrugated board 3 are all separated from the bottom column 33 on the lower side, the corrugated board 3 can be removed, so that the device can be quickly disassembled and efficiency is improved. After that, the column 1 and the corrugated board 3 on the bottom layer can be removed.

[0054] Further, such as Figure 6 As shown, the top column 31 is provided with a first water stop line 311 , and the bottom column 33 is provided with a second water stop line 331 . Both the first water stop line 311 and the second water stop line 331 are provided with rubber strips for sealing between the top column 31 and the bottom column 33 .

[0055] In the above solution, the sealing between the top column 31 and the bottom column 33 is improved. The first water stop line 311 on the top column 31 has one line, and the second water stop line 331 on the bottom column 33 has two lines. The rubber strips on the first water stop line 311 and the second water stop line 331 are used to improve the sealing effect.

[0056] Further, such as Figure 5As shown, it also includes: a sliding ring 8, which has several pieces, and the bottom column 33 is provided with several first sliding grooves 332. The sliding ring 8 is slidably connected to the adjacent first sliding grooves 332. A tension spring is provided between the sliding ring 8 and the bottom column 33. The bottom column 33 is provided with several second sliding grooves 333. The number of the second sliding grooves 333 is consistent with the number of the first sliding grooves 332. The second sliding grooves 333 are connected to the adjacent first sliding grooves 332.

[0057] Further, such as Figure 5 As shown, it also includes: first sliding plates 9, the number of which is consistent with the number of the second sliding grooves 333, and the first sliding plates 9 are slidably connected to the adjacent second sliding grooves 333.

[0058] In the above scheme, the pressure between the top column 31 and the bottom column 33 is adjusted. A seal is provided between the sliding ring 8 and the bottom column 33. The seal can be a rubber ring or the like. A seal is provided between the first sliding plate 9 and the bottom column 33. The second chute 333 is connected to the adjacent first chute 332 via a pipe. The first chute 332 and the second chute 333, as well as the pipe therebetween, are filled with a liquid for transmission, such as hydraulic oil. The sewage pressure in this device acts on the first sliding plate 9, which squeezes the liquid in the second chute 333 and the first chute 332, thereby causing water pressure to act on the sliding ring 8. The pressure on the sliding ring 8 is changed according to the water pressure, thereby changing the pressure between the top column 31 and the bottom column 33. This ensures that the rubber strip between the top column 31 and the bottom column 33, which are located in a shallower part of the water, is subjected to less pressure while ensuring sealing, thereby extending its service life.

[0059] Further, such as Figure 1 and Figure 7 As shown, it also includes: first tie bars 10, which have several groups, each group of first tie bars 10 has two first tie bars 10, and two opposite corrugated plates 3 form a group. Each group of first tie bars 10 is hinged to one of the two groups of corrugated plates 3 located on the same layer. The first tie bars 10 are fixedly connected to several second tie bars 11, and the second tie bars 11 are hinged to the adjacent bottom columns 33.

[0060] In the above solution, the maximum pressure that the corrugated board 3 can withstand is increased. The first and second tie bars 10 and 11 are both made of stainless steel tubes to increase their multi-directional tensile strength. The second tie bars 11 and the first tie bars 10 are connected by welding.

[0061] Further, such as Figure 7 and Figure 8As shown, it also includes: a shell 12, the number of which is half the number of the first tie bars 10, the shell 12 is fixedly connected to one of the first tie bars 10 in the same group, and the other first tie bar 10 is slidingly connected to the shell 12; a second sliding plate 13, the number of which is consistent with the number of the shell 12, the shell 12 is provided with a first cavity 121, the second sliding plate 13 is slidingly connected to the adjacent first cavity 121, and the second sliding plate 13 is fixed to the adjacent first tie bar 10.

[0062] Further, such as Figure 8 As shown, it also includes: a third sliding plate 14, the number of which is consistent with the number of the shell 12, the shell 12 is provided with a second cavity 122, the third sliding plate 14 is slidably connected to the adjacent second cavity 122, and the second cavity 122 is connected to the adjacent first cavity 121.

[0063] The above scheme aims to adjust the tension exerted by the first tie bars 10 on the corrugated sheet 3, thereby ensuring the compressive strength of the corrugated sheet 3 and extending its service life. Several blocks are provided within the housing 12 to block the second sliding plate 13 and prevent it from crossing the connection between the first cavity 121 and the second cavity 122. The second cavity 122 is connected to the adjacent first cavity 121. Both the second cavity 122 and the first cavity 121 are filled with a liquid for transmission. The sewage within the device compresses the third sliding plate 14, causing it to move, pushing the liquid in the second cavity 122 into the first cavity 121. The liquid pressure acts on the second sliding plate 13 and one side of the housing 12, causing the two first tie bars 10 to generate opposing tension to offset some of the pressure exerted on the corrugated sheet 3. The tension exerted by the two first tie bars 10 varies depending on the water depth.

[0064] Working process: When the device is assembled, the bolts and nuts squeeze the adjacent top columns 31 and the adjacent sliding rings 8 respectively. After the bottom plate 1, the column 1 and the corrugated plate 3 are assembled, the first tie rod 10 and the second tie rod 11 are connected to the adjacent corrugated plate 3. Pins can be used for connection. When the connection is completed and sewage is added, the water level in the device gradually rises and first covers the first sliding plate 9 on the lower side, and then covers the first sliding plate 9 on the upper side. When the water depth is different, the sewage in the device has different pressures at different heights. Therefore, the sealing requirement between the top column 31 and the lower bottom column 33 is insufficient. At this time, the water pressure pushes the first sliding plate 9 to move, and the first sliding plate 9 The liquid in the adjacent second chute 333 is pressed into the adjacent first chute 332, and the pressure in the first chute 332 increases, pushing the sliding ring 8 to move upward. The sliding ring 8 squeezes the nut, so that the nut drives the bolt to move upward, causing the bolt to increase the pressure on the top column 31, and then the pressure between the top column 31 and the upper bottom column 33 is increased, thereby improving the sealing between the two. The first sliding plate 9 located closer to the water surface is subjected to less water pressure, so the corresponding pressure between the top column 31 and the upper bottom column 33 is also smaller, thereby ensuring sealing while reducing the pressure on the rubber strip, thereby extending the service life of the rubber strip.

[0065] When the water level in the device submerges the third sliding plate 14, the water pressure pushes the third sliding plate 14, which presses the liquid in the adjacent second cavity 122 into the first cavity 121. The increase in liquid in the first cavity 121 pushes the second sliding plate 13 to move, and the second sliding plate 13 pulls the adjacent first tie bars 10, thereby increasing the tension between the two adjacent first tie bars 10. When the water depth is different, the water pressure applied to the third sliding plate 14 is different, so that the first tie bars 10 located at a deeper depth exert a greater tension on the bottom column 33, thereby preventing the corrugated board 3 at a deeper depth from deforming outward due to excessive water pressure. The first tie bars 10 located at a shallower depth exert a smaller tension on the bottom column 33, thereby preventing stress concentration on the corrugated board 3 and shortening its service life. When the device is disassembled after use, the water in the device is first drained, and then the pins between the first and second tie bars 10, 11 and the adjacent corrugated board 3 are removed, thereby removing the first and second tie bars 10, 11, and then the rest of the device can be disassembled. Example 2

[0066] Compared with Example 1, the difference is that Figure 9 and Figure 10 As shown, the concave-convex ribs 341 on the baffle 34 are continuous, and the forms of a single concave-convex rib 341 include U-shaped and V-shaped ( Figure 9 The U-shape is shown in the figure), the first water stop line 311 on the top column 31 has two lines, and the second water stop line 331 on the bottom column 33 has two lines. At the same time, convex ribs 15 are added to the left and right sides of the top column 31 to improve the structural strength of the top column 31.

[0067] The present invention provides a train of thought and method. There are many methods and approaches to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention. All components not specified in this embodiment can be implemented using existing technologies.

Claims

1. An assembled sewage treatment tank, characterized in that it comprises: The columns (1) are provided with a plurality of columns, the plurality of columns (1) are distributed in a rectangular shape, the columns (1) are provided with reinforcing ribs (2), a plurality of corrugated plates (3) are provided between two adjacent columns (1), the corrugated plates (3) include a top column (31), the top column (31) is fixedly connected to two side columns (32), the two side columns (32) are commonly fixedly connected to a bottom column (33), the top column (31) is fixedly connected to a baffle (34), the side columns (32) and the bottom column (33) are both fixedly connected to the baffle (34), and the top column (31) is fixedly connected to a plurality of mounting blocks (4); The number of the limiting blocks (5) is the same as the number of the mounting blocks (4), the limiting blocks (5) are slidably connected to the adjacent mounting blocks (4), a first spring is provided between the limiting blocks (5) and the mounting blocks (4), and the limiting blocks (5) are used to limit the adjacent bottom columns (33); Also included are: The first tie bars (10) have a plurality of groups, each group of the first tie bars (10) has two members, two opposite corrugated plates (3) form a group, each group of the first tie bars (10) is hinged to one of the two groups of corrugated plates (3) located on the same layer, the first tie bars (10) are fixedly connected to a plurality of second tie bars (11), and the second tie bars (11) are hinged to the adjacent bottom columns (33); Also included are: a shell (12), the number of which is half the number of the first tie bars (10), the shell (12) being fixedly connected to one of the first tie bars (10) in the same group, and the other first tie bar (10) being slidably connected to the shell (12); The number of second sliding plates (13) is the same as that of the shell (12), the shell (12) is provided with a first cavity (121), the second sliding plates (13) are slidably connected in the adjacent first cavity (121), and the second sliding plates (13) are fixedly connected to the adjacent first tie bars (10); Also included are: The number of third sliding plates (14) is the same as the number of the housing (12), the housing (12) is provided with a second cavity (122), the third sliding plates (14) are slidably connected in the adjacent second cavity (122), and the second cavity (122) is communicated with the adjacent first cavity (121); When the water surface in the pool body is submerged above the third sliding plate (14), the water pressure pushes the third sliding plate (14), and the third sliding plate (14) presses the liquid in the adjacent second cavity (122) into the first cavity (121). The increase in the liquid in the first cavity (121) pushes the second sliding plate (13) to move, and the second sliding plate (13) pulls the adjacent first tie bars (10), thereby increasing the tension between the two adjacent first tie bars (10). When the water depth is different, the water pressure on the third sliding plate (14) is different, so that the first tie bars (10) located at a deeper depth exert a greater tension on the bottom column (33), and the first tie bars (10) located at a shallower depth exert a smaller tension on the bottom column (33).

2. The assembled sewage treatment tank according to claim 1, characterized in that: The baffle (34) is provided with a plurality of concave-convex ribs (341) for improving the strength of the baffle (34). The concave-convex ribs (341) include segmented and continuous types, and the forms of a single concave-convex rib (341) include U-shape and V-shape.

3. The assembled sewage treatment tank according to claim 1, characterized in that: Also included are: The number of the sliding members (6) is the same as the number of the mounting blocks (4); the sliding members (6) are slidably connected to the adjacent mounting blocks (4); and the sliding members (6) are fixedly connected to the adjacent limiting blocks (5).

4. The assembled sewage treatment tank according to claim 3, characterized in that: Also included are: The number of the limiting columns (7) is consistent with the number of the mounting blocks (4), the limiting columns (7) are slidably connected to the adjacent mounting blocks (4), a second spring is provided between the limiting columns (7) and the mounting blocks (4), the limiting blocks (5) are provided with grooves, and the limiting columns (7) are used to limit the limiting blocks (5) through the grooves on the limiting blocks (5).

5. The assembled sewage treatment tank according to claim 1, characterized in that: The top column (31) is provided with a plurality of first waterstop lines (311), and the bottom column (33) is provided with a plurality of second waterstop lines (331). Rubber strips are provided at the first waterstop lines (311) and the second waterstop lines (331) for sealing between the top column (31) and the bottom column (33).

6. The assembled sewage treatment tank according to claim 5, characterized in that: Also included are: The sliding ring (8) has a plurality of them, the bottom column (33) is provided with a plurality of first sliding grooves (332), the sliding ring (8) is slidably connected to the adjacent first sliding grooves (332), a tension spring is provided between the sliding ring (8) and the bottom column (33), the bottom column (33) is provided with a plurality of second sliding grooves (333), the number of the second sliding grooves (333) is consistent with the number of the first sliding grooves (332), and the second sliding grooves (333) are connected to the adjacent first sliding grooves (332).

7. The assembled sewage treatment tank according to claim 6, characterized in that: Also included are: The number of the first sliding plates (9) is the same as the number of the second sliding grooves (333), and the first sliding plates (9) are slidably connected to adjacent second sliding grooves (333).

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