Water decoding ecological base sewage treatment device

Abstract

The invention discloses a water decoding ecological base sewage treatment device which comprises a sewage pool, an air inlet main pipe, an air inlet branch pipe, an ecological base assembly and an aeration head, the air inlet main pipe is fixedly arranged above the sewage pool, the air inlet branch pipe is detachably and fixedly connected with the air inlet main pipe, the air inlet branch pipe is inserted into the sewage pool, the ecological base assembly is arranged on the air inlet branch pipe and located in the sewage pool, and the aeration head is fixedly arranged at the end, away from the air inlet main pipe, of the air inlet branch pipe and can conduct aeration on sewage. According to the aeration system, the air inlet branch pipe and the air inlet main pipe are detachably connected, so that the aeration system can be more conveniently replaced and overhauled, sewage does not need to be emptied, and therefore, the replacement and maintenance efficiency of aeration facilities can be improved, and the maintenance cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a water-decoding ecological-based sewage treatment device. Background Art

[0002] WaterDecoding's eco-based wastewater treatment is a new type of wastewater treatment process. It places an eco-base in the sewage for microbial cultivation. A large number of microorganisms in the sewage adhere to the surface of the eco-base. The microorganisms treat pollutants such as COD, nitrogen and phosphorus in the sewage to achieve the purpose of purifying the sewage.

[0003] Existing sewage treatment equipment requires aeration treatment of sewage to increase the oxygen content of sewage. Usually, the aeration pipe and aeration head are placed at the bottom of the sewage pool and fixed, and then the ecological base is placed in the sewage pool, and the aeration head is placed below the ecological base; and the aeration pipe and ecological base are usually fixed in the sewage pool. Therefore, when the aeration equipment is blocked and needs to be repaired or replaced, the sewage in the sewage pool needs to be emptied for repair and replacement. This method is more cumbersome, and suspended fillers need to be added after the repair is completed; after the repair is completed, the new pool needs to be cultured with biological bacteria for 15 days, and finally the company submits an application for resumption of production to the environmental protection department. Only after approval can it resume production, which seriously affects the progress of sewage treatment. Summary of the Invention

[0004] The purpose of the present invention is to provide a water decoding ecological based sewage treatment device to address the deficiencies of the above-mentioned prior art.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: A water decoding ecologically based sewage treatment device includes a sewage tank; An air inlet pipe is provided on the sewage pool, and the air inlet pipe is located above the sewage pool; There are multiple air inlet branch pipes, which are detachably connected to the air inlet main pipe and are inserted into the sewage tank; an eco-based component, disposed on the air inlet branch pipe, the eco-based component being located in the sewage pool; The aeration head is fixedly arranged at the lower end of the air inlet branch pipe, and the aeration head is located below the ecological base component.

[0006] Preferably, an air distribution pipe is fixedly connected to the air inlet main pipe, and one end of the air distribution pipe away from the air inlet main pipe is threadedly connected to the air inlet branch pipe.

[0007] Preferably, a valve is provided on the gas distribution pipe to control the on / off of the gas distribution pipe.

[0008] Preferably, a cavity is provided inside the aeration head, the air inlet branch pipe is communicated with the cavity inside the aeration head, and a plurality of aeration holes are provided on the upper end surface of the aeration head.

[0009] Preferably, each of the air inlet branch pipes is provided with a plurality of eco-based components, and the plurality of eco-based components are evenly arranged along the length direction of the air inlet branch pipe.

[0010] Preferably, the eco-base component includes an upper fixing part and a lower fixing part, both of which are fixedly arranged on the air inlet branch pipe, the upper fixing part is located above the lower fixing part, and multiple eco-bases are arranged between the upper fixing part and the lower fixing part.

[0011] Preferably, the upper fixing member includes an upper fixing sleeve, the upper fixing sleeve is fixedly arranged on the air inlet branch pipe, an upper fixing ring is arranged on the outer side of the upper fixing sleeve, and the upper fixing sleeve and the upper fixing ring are fixedly connected by an upper support rod; The lower fixing member includes a lower fixing sleeve, the lower fixing sleeve is located below the upper fixing sleeve, the lower fixing sleeve is fixedly arranged on the air inlet branch pipe, a lower fixing ring is arranged on the outer side of the lower fixing sleeve, and the lower fixing sleeve and the lower fixing ring are fixedly connected by a lower support rod; The two ends of the ecological base are connected to the upper fixing ring and the lower fixing ring respectively.

[0012] Preferably, a fixing rod is provided between the upper fixing ring and the lower fixing ring.

[0013] Preferably, the upper fixing member further comprises an upper connecting ring, and the upper connecting ring is located between the upper fixing sleeve and the upper fixing ring; the lower fixing member further comprises a lower connecting ring, and the lower connecting ring is located between the lower fixing sleeve and the lower fixing ring; The upper and lower ends of the ecological base are respectively connected to the upper connecting belt and the lower connecting belt, the two ends of the upper connecting belt are respectively fixedly connected to the upper connecting ring and the upper fixing ring, the two ends of the lower connecting belt are respectively fixedly connected to the lower connecting ring and the lower fixing ring, and an ecological base is arranged between the upper connecting belt and the lower connecting belt.

[0014] Preferably, the upper connecting ring, the lower connecting ring, the upper fixed ring and the lower fixed ring are all provided with a plurality of fixing holes along the circumferential direction, and fixing columns are fixed at both ends of the upper connecting belt and the lower connecting belt, and the fixing columns at both ends of the upper connecting belt are inserted into the fixing holes on the upper connecting ring and the upper fixed ring, and the fixing columns at both ends of the lower connecting belt are inserted into the fixing holes on the lower connecting ring and the lower fixed ring.

[0015] The beneficial effects of adopting the above technical solution are: 1. In the present invention, the air inlet main pipe is fixedly installed above the sewage tank, the air inlet branch pipe is installed on the air inlet main pipe and is detachably connected to the air inlet main pipe. The eco-based component and the aeration head are both connected to the air inlet branch pipe and submerged in the sewage tank. When inspecting or replacing the eco-based component, it is only necessary to remove the air inlet branch pipe from the air inlet main pipe and remove the air inlet branch pipe, the eco-based component and the aeration head installed on the air inlet branch pipe from the sewage for replacement and maintenance. This process is simple and convenient, and can significantly reduce maintenance costs. 2. In the present invention, the upper connecting belt and the lower connecting belt in the eco-base assembly are arranged in the fixing holes of the upper connecting ring, the lower connecting ring, the upper fixed ring and the lower fixed ring through the fixing column, and the eco-base is arranged between the upper connecting belt and the lower connecting belt. Therefore, it is convenient to add or reduce the number of eco-bases according to actual needs. Combined with the simple and convenient disassembly between the air inlet branch pipe and the air inlet main pipe, the increase or decrease of the eco-base is also simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 It is a three-dimensional schematic diagram of the internal structure of the sewage pool of the present invention; Figure 4 It is a three-dimensional schematic diagram of the eco-based component of the present invention; Figure 5 It is a three-dimensional schematic diagram of the ecological base of the present invention.

[0017] In the figure: 1 is the sewage pool, 2 is the air inlet main pipe, 3 is the air inlet branch pipe, 4 is the ecological base component, 5 is the aeration head, 6 is the air distribution pipe, 7 is the valve, 8 is the aeration hole, 9 is the upper fixing part, 10 is the lower fixing part, 11 is the upper fixing sleeve, 12 is the upper fixing ring, 13 is the upper support rod, 14 is the lower fixing sleeve, 15 is the lower fixing ring, 16 is the lower support rod, 17 is the fixing rod, 18 is the upper connecting ring, 19 is the lower connecting ring, 20 is the upper connecting belt, 21 is the lower connecting belt, 22 is the ecological base, 23 is the fixing hole, 24 is the fixing column, and 25 is the pressure gauge. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0021] like Figure 1 and Figure 2As shown, a water decoding ecological-based sewage treatment device includes a sewage pool 1. The sewage pool 1 is a water pool with an open upper end made of cement. Sewage can be transported to the sewage pool 1 for purification treatment. An air inlet main pipe 2 is fixedly provided at the upper end of the sewage pool 1. A blower is connected to the air inlet main pipe 2 for blowing air into the air inlet main pipe 2; a plurality of air inlet branch pipes 3 are connected to the air inlet main pipe 2, and the plurality of air inlet branch pipes 3 are arranged in parallel. The air inlet branch pipes 3 extend vertically into the sewage pool 1. The air inlet branch pipes 3 are detachably fixedly connected to the air inlet main pipe 2. An ecological-based component 4 is provided on the air inlet branch pipe 3. The ecological-based component 4 is located in the sewage pool 1 for purifying sewage. An aeration head 5 is fixedly provided at the lower end of the air inlet branch pipe 3, and the aeration head 5 is located below the ecological-based component 4. In the present invention, the air inlet branch pipe 3 provided with the ecological base component 4 and the aeration head 5 is inserted into the sewage in the sewage pool 1 to purify the sewage, and the air inlet main pipe 2 is detachably connected to the air inlet main pipe 2 located above the sewage pool 1, so that the air inlet main pipe 2 and the air inlet branch pipe 3 can be connected, and the air flow blown out by the blower can flow through the air inlet main pipe 2 and the air inlet branch pipe 3 in sequence and be discharged from the aeration head 5, thereby oxygenating the sewage in the sewage pool 1 and allowing the microorganisms attached to the ecological base component 4 to decompose the pollutants in the sewage; since the air inlet branch pipe 3 and the air inlet main pipe 2 are detachably fixedly connected, when the ecological base component 4 is replaced or repaired, the air inlet branch pipe 3 and the air inlet main pipe 2 can be quickly separated, and the air inlet branch pipe 3 can be taken out from the sewage without draining the sewage, and the damaged equipment can be repaired and replaced without stopping production, so there is no need to culture biological bacteria again and go through the approval procedures of relevant departments, which can greatly improve the progress of sewage treatment.

[0022] Furthermore, an air distribution pipe 6 is fixedly connected to the air inlet main pipe 2, and the air distribution pipe 6 is arranged vertically downward. The end of the air distribution pipe 6 close to the air inlet main pipe 2 is fixedly connected to the air inlet main pipe 2, and the end of the air distribution pipe 6 away from the air inlet main pipe 2 is provided with an external thread, and one end of the air inlet branch pipe 3 is provided with an internal thread. Therefore, the end of the air distribution pipe 6 away from the air inlet main pipe 2 is threadedly connected to the air inlet branch pipe 3, which facilitates the rapid installation and disassembly of the air inlet branch pipe 3.

[0023] In another embodiment, a quick connector is provided between the air distribution pipe 6 and the air inlet branch pipe 3, and both ends of the quick connector are respectively connected to the air distribution pipe 6 and the air inlet branch pipe 3, so that the air inlet branch pipe 3 and the air distribution pipe 6 can be quickly disassembled and installed. The quick connector can be a quick connector purchased on the market for quickly connecting pipes, which belongs to the existing technology and will not be repeated here.

[0024] Furthermore, a valve 7 is provided on the air distribution pipe 6. The valve 7 adopts an electromagnetic valve or an electric valve to control the on and off of the air distribution pipe 6. When the air inlet branch pipe 3 is disassembled and installed, the valve 7 can be closed to prevent the air flow from entering the air inlet branch pipe 3. After the replacement is completed, the valve 7 can be opened.

[0025] Furthermore, if Figure 3 As shown, the aeration head 5 is a circular structure with a cavity inside the aeration head 5. The air inlet branch pipe 3 is connected to the cavity inside the aeration head 5. A plurality of aeration holes 8 are provided on the upper end surface of the aeration head 5. The airflow in the air inlet branch pipe 3 can enter the cavity inside the aeration head 5 and be discharged from the aeration holes 8, thereby oxygenating the sewage.

[0026] Furthermore, each air inlet branch pipe 3 is connected to a pressure gauge 25, which is located above the ecological base component and above the water surface of the sewage pool, so as to facilitate observation of the pressure gauge 25; when a problem occurs with the aeration head 5 at the bottom of the sewage pool, it is not easy to observe from above the water surface, and the pressure gauge 25 can be used to observe whether the air pressure is stable. When the pressure gauge 25 shows a sudden decrease, it can be known that there is a problem with the aeration head 5 at the bottom, and the corresponding air distribution pipe 6 can be closed by controlling the valve 7 to prevent the gas from entering the air inlet branch pipe 3. The air inlet branch pipe 3 can then be quickly disassembled and removed from the sewage pool for replacement and maintenance; the corresponding valve 7 can also be directly closed until 30% of the equipment is operating abnormally, and relevant personnel are organized to perform overall inspection and maintenance.

[0027] Furthermore, if Figure 3 As shown, each air inlet branch pipe 3 is provided with a plurality of eco-based components, and the plurality of eco-based components are evenly arranged along the length direction of the air inlet branch pipe 3 .

[0028] Furthermore, if Figure 4 As shown, the eco-base assembly 4 includes an upper fixing member 9 and a lower fixing member 10, both of which are fixedly arranged on the air inlet branch pipe 3, the upper fixing member 9 is located above the lower fixing member 10, and a plurality of eco-bases 22 are arranged between the upper fixing member 9 and the lower fixing member 10; The upper fixing member 9 includes an upper fixing sleeve 11, which is a circular ring structure. The upper fixing sleeve 11 is sleeved and fixedly arranged on the air inlet branch pipe 3. An upper fixing ring 12 is arranged on the outer side of the upper fixing sleeve 11. The upper fixing sleeve 11 and the upper fixing ring 12 are coaxially arranged. The upper fixing sleeve 11 and the upper fixing ring 12 are fixedly connected by an upper support rod 13. A plurality of upper support rods 13 are evenly arranged along the circumferential direction. The lower fixing member 10 includes a lower fixing sleeve 14, which is located below the upper fixing sleeve 11. The lower fixing sleeve 14 is fixedly arranged on the air inlet branch pipe 3. A lower fixing ring 15 is provided on the outer side of the lower fixing sleeve 14. The lower fixing sleeve 14 and the lower fixing ring 15 are coaxially arranged. The lower fixing sleeve 14 and the lower fixing ring 15 are fixedly connected by lower support rods 16. A plurality of lower support rods 16 are evenly arranged along the circumferential direction. The lower support rods 16 are located directly below the upper support rods 13, and the lower support rods 16 correspond one to one with the upper support rods 13. The eco-base 22 is an elongated structure, connected at its upper and lower ends to the upper and lower fixing rings 12 and 15, respectively. Multiple eco-bases 22 are evenly spaced along the circumference between the upper and lower fixing rings 12 and 15. In the present invention, the eco-base 22 provides a support environment for microorganisms to attach and grow. After the microorganisms multiply on the eco-base 22, they can decompose pollutants in the sewage, thereby purifying the wastewater.

[0029] It should be noted that the ecological base 22 includes a long strip of connecting rope in the middle, and terry-shaped fiber filaments are densely woven around the connecting rope along the length direction. The fiber filaments are made of bright silk fiber, and the terry-shaped fiber filaments are directed upward. When a large number of microorganisms attach to the fiber filaments, the weight of the fiber filaments increases, which can cause the fiber filaments to expand downward and open the terry-shaped fiber filaments, thereby increasing the attachment area of ​​the microorganisms, allowing more microorganisms to attach to the ecological base 22, and speeding up the sewage treatment.

[0030] In another embodiment, the two ends of the eco-base 22 are fixedly arranged on the upper support rod 13 and the lower support rod 16, respectively, wherein each upper support rod 13 and the corresponding lower support rod 16 form a group, and each group can be provided with multiple eco-bases 22, so that more eco-bases 22 can be set to provide more growth carriers for microorganisms. Furthermore, a fixing rod 17 is provided between the upper fixing ring 12 and the lower fixing ring 15, and the upper and lower ends of the fixing rod 17 are fixedly connected to the upper fixing ring 12 and the lower fixing ring 15 respectively, thereby making the connection between the upper fixing ring 12 and the lower fixing ring 15 more stable and firm.

[0031] Furthermore, if Figure 4 As shown, the upper fixing member 9 further includes an upper connecting ring 18, which is an annular structure. The upper connecting ring 18 is located between the upper fixing sleeve 11 and the upper fixing ring 12, and the upper connecting ring 18 is also fixedly connected to the upper support rod 13; the lower fixing member 10 further includes a lower connecting ring 19, which is located between the lower fixing sleeve 14 and the lower fixing ring 15, and the lower connecting ring 19 is also fixedly connected to the lower support rod 16; The ends of the eco-base 22 are connected to an upper connecting belt 20 and a lower connecting belt 21, respectively. The ends of the upper connecting belt 20 are fixedly connected to the upper connecting ring 18 and the upper fixing ring 12, respectively. The ends of the lower connecting belt 21 are fixedly connected to the lower connecting ring 19 and the lower fixing ring 15, respectively. The eco-base 22 is provided between the upper connecting belt 20 and the lower connecting belt 21. In this embodiment, multiple upper connecting belts 20 and lower connecting belts 21 are evenly arranged along the circumferential direction. The upper connecting belts 20 are located directly above the lower connecting belts 21, and the upper connecting belts 20 and the lower connecting belts 21 correspond one to one. Each set of upper connecting belts 20 and lower connecting belts 21 is provided with multiple eco-bases 22.

[0032] In another embodiment, the upper connecting belt 20 and the lower connecting belt 21 are made of a flexible material, such as a canvas strip, and have a certain deformation amount. The aeration head 5 will generate a large number of bubbles in the water, causing the water body to be violently disturbed. After the water body is disturbed, it will drive the ecological base 22 to swing. The upper connecting belt 20 and the lower connecting belt 21 are made of a flexible material, which can have a certain buffering effect on the ecological base 22, so that the ecological base 22 can avoid breaking during the swinging process, thereby extending its service life.

[0033] Furthermore, if Figure 4 and Figure 5 As shown, a plurality of fixing holes 23 are opened in the circumferential direction on the upper connecting ring 18, the lower connecting ring 19, the upper fixed ring 12 and the lower fixed ring 15, and fixing columns 24 are fixed at both ends of the upper connecting belt 20 and the lower connecting belt 21. The fixing columns 24 at both ends of the upper connecting belt 20 are inserted into the fixing holes 23 on the upper connecting ring 18 and the upper fixed ring 12, and the fixing columns 24 at both ends of the lower connecting belt 21 are inserted into the fixing holes 23 on the lower connecting ring 19 and the lower fixed ring 15. In this embodiment, by inserting the fixing columns 24 on the upper connecting belt 20 and the lower connecting belt 21 into the fixing holes 23, the number of ecological bases 22 can be controlled, thereby increasing or decreasing the number of ecological bases 22. When increasing or decreasing the ecological bases 22, the air inlet branch pipe 3 needs to be removed from the sewage. The detachable connection between the air inlet branch pipe 3 and the air intake main pipe 2 in this application can more conveniently remove the air inlet branch pipe 3 from the air intake main pipe 2, thereby removing the air inlet branch pipe 2 from the sewage and adjusting the number of ecological bases 22.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water decoding ecological sewage treatment device, characterized in that, including sewage pool (1); An air inlet main pipe (2) is provided on the sewage pool (1), and the air inlet main pipe (2) is located above the sewage pool (1); A plurality of air inlet branch pipes (3) are provided, which are detachably connected to the air inlet main pipe (2), and the air inlet branch pipes (3) are inserted into the sewage pool (1); An eco-based component (4) is arranged on the air inlet branch pipe (3), and the eco-based component is located in the sewage pool (1); An aeration head (5) is fixedly arranged at the lower end of the air inlet branch pipe (3), and the aeration head (5) is located below the ecological base component.

2. A water decoding ecological sewage treatment device according to claim 1, characterized in that: An air distribution pipe (6) is fixedly connected to the air inlet main pipe (2), and one end of the air distribution pipe (6) away from the air inlet main pipe (2) is threadedly connected to the air inlet branch pipe (3).

3. A water decoding ecological sewage treatment device according to claim 2, characterized in that: The gas distribution pipe (6) is provided with a valve (7) for controlling the on / off of the gas distribution pipe (6).

4. A water decoding ecological sewage treatment device according to claim 1, characterized in that: A cavity is provided inside the aeration head (5), the air inlet branch pipe (3) is connected to the cavity inside the aeration head (5), and a plurality of aeration holes (8) are provided on the upper end surface of the aeration head (5).

5. A water decoding ecological sewage treatment device according to claim 1, characterized in that: Each of the air inlet branch pipes (3) is provided with a plurality of eco-based components (4), and the plurality of eco-based components (4) are evenly arranged along the length direction of the air inlet branch pipe (3).

6. A water decoding ecological sewage treatment device according to claim 1, characterized in that: The eco-base component (4) comprises an upper fixing member (9) and a lower fixing member (10), wherein the upper fixing member (9) and the lower fixing member (10) are both fixedly arranged on the air inlet branch pipe (3), the upper fixing member (9) is located above the lower fixing member (10), and a plurality of eco-bases (22) are arranged between the upper fixing member (9) and the lower fixing member (10).

7. A water decoding ecological sewage treatment device according to claim 6, characterized in that: The upper fixing member (9) comprises an upper fixing sleeve (11), the upper fixing sleeve (11) is fixedly arranged on the air inlet branch pipe (3), an upper fixing ring (12) is arranged on the outer side of the upper fixing sleeve (11), and the upper fixing sleeve (11) and the upper fixing ring (12) are fixedly connected via an upper support rod (13); The lower fixing member (10) comprises a lower fixing sleeve (14), the lower fixing sleeve (14) is located below the upper fixing sleeve (11), the lower fixing sleeve (14) is fixedly arranged on the air inlet branch pipe (3), a lower fixing ring (15) is arranged on the outer side of the lower fixing sleeve (14), and the lower fixing sleeve (14) and the lower fixing ring (15) are fixedly connected via a lower support rod (16); The two ends of the ecological base (22) are respectively connected to the upper fixing ring (12) and the lower fixing ring (15).

8. A water-decoding ecological-based sewage treatment device according to claim 7, characterized in that: A fixing rod (17) is provided between the upper fixing ring (12) and the lower fixing ring (15).

9. The water-decoding ecological-based sewage treatment device according to claim 7, characterized in that: The upper fixing member (9) further comprises an upper connecting ring (18), wherein the upper connecting ring (18) is located between the upper fixing sleeve (11) and the upper fixing ring (12); the lower fixing member (10) further comprises a lower connecting ring (19), wherein the lower connecting ring (19) is located between the lower fixing sleeve (14) and the lower fixing ring (15); The upper and lower ends of the ecological base (22) are respectively connected to an upper connecting belt (20) and a lower connecting belt (21); the two ends of the upper connecting belt (20) are respectively fixedly connected to the upper connecting ring (18) and the upper fixing ring (12); the two ends of the lower connecting belt (21) are respectively fixedly connected to the lower connecting ring (19) and the lower fixing ring (15); and the ecological base (22) is provided between the upper connecting belt (20) and the lower connecting belt (21).

10. A water decoding ecological sewage treatment device according to claim 9, characterized in that: The upper connecting ring (18), the lower connecting ring (19), the upper fixing ring (12) and the lower fixing ring (15) are all provided with a plurality of fixing holes (23) along the circumferential direction. The upper connecting belt (20) and the lower connecting belt (21) are both fixedly provided with fixing columns (24). The fixing columns (24) at both ends of the upper connecting belt (20) are inserted into the fixing holes (23) on the upper connecting ring (18) and the upper fixing ring (12). The fixing columns (24) at both ends of the lower connecting belt (21) are inserted into the fixing holes (23) on the lower connecting ring (19) and the lower fixing ring (15).

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