Water retaining fence for maintenance of underwater sewage treatment equipment

Abstract

The utility model discloses a water retaining enclosure for overhauling underwater sewage treatment equipment, which comprises an enclosure body, a sealing mechanism and a limiting mechanism, and the enclosure body is of a closed structure so as to define an overhauling space; the sealing mechanism comprises a water bag, the water bag is of a closed structure and arranged on the outer side of the fence body in a surrounding mode, and the water bag is used for containing water. The limiting mechanism is detachably and fixedly connected with the outer side wall of the fence body and used for limiting the water bag so that the water bag can abut against the outer side wall of the fence body and the bottom face of the water pool. The water retaining device has the advantages that the gap between the bottom face of the fence body and the bottom face of the pool can be sealed through the air bag, after sewage in the maintenance space is pumped out, the sewage in the pool cannot permeate into the maintenance space from the gap between the bottom face of the fence body and the bottom face of the pool, and the water retaining effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance engineering, in particular to a water retaining enclosure for overhauling underwater sewage treatment equipment. Background Art

[0002] With the increasing popularity of urban and industrial sewage treatment plants, underwater sewage treatment equipment is applied more and more frequently in sewage treatment plants due to its advantages such as less land occupation, low noise, and high working efficiency. Since sewage often contains chemical corrosive substances such as acids, alkalis, and salts, or some corrosive gases are generated by the decomposition of organic substances in sewage, such as hydrogen sulfide and ammonia, over time, it will cause the underwater sewage treatment equipment to rot and damage, making the equipment unable to be normally hoisted out for overhaul or replacement.

[0003] For the maintenance and overhaul of underwater sewage treatment equipment, the conventional method is to drain the sewage in the pool or lower it to an operable water level, and then personnel enter the pool to overhaul or replace the equipment. Since the volume of the sewage pool is usually large, the drainage process takes a long time, consumes a large amount of electricity, and the drained sewage needs to be temporarily stored in a large enough reservoir. In actual projects, many sewage treatment plants do not have the conditions for stopping production and draining water or temporarily storing sewage, and sewage overflow pollution incidents occur frequently. Therefore, it is very necessary to carry out maintenance and overhaul operations of underwater sewage treatment equipment without stopping production and with water. Generally, a water retaining enclosure is used to enclose the underwater sewage treatment equipment to be overhauled in a space, and the sewage in the space is pumped out, and then maintenance personnel enter the space to overhaul or replace the underwater sewage treatment equipment.

[0004] When the existing water retaining enclosure (such as a prefabricated enclosure with a water retaining function disclosed in the application number 202020132001.2) is in use, the bottom surface of the enclosure is not tightly sealed with the bottom surface of the pool, and there are easily gaps. When the sewage in the enclosure is pumped out, there is a water pressure difference between the inside and outside of the enclosure, and the sewage outside the enclosure easily seeps into the inside of the enclosure from the gap between the bottom surface of the enclosure and the bottom surface of the pool, and the water retaining effect is poor. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies, and provide a water retaining enclosure for overhauling underwater sewage treatment equipment, so as to solve the technical problems that in the prior art, the bottom surface of the enclosure is not tightly sealed with the bottom surface of the pool, there are gaps, and when there is a water pressure difference between the inside and outside of the enclosure, water seepage will occur and the water retaining effect is poor.

[0006] To achieve the above technical purpose, the technical solution of the utility model provides a water retaining enclosure for overhauling underwater sewage treatment equipment, including:

[0007] An enclosure body, the enclosure body is a closed structure to enclose a maintenance space;

[0008] A sealing mechanism, which includes a water bag. The water bag is a closed structure and is disposed around the outer side of the enclosure body. Water is contained in the water bag.

[0009] A limiting mechanism, which is detachably fixed to the outer side wall of the enclosure body and is used to limit the water bag so that the water bag presses against the outer side wall of the enclosure body and the bottom surface of the pool.

[0010] Further, the enclosure body includes at least three columns and a plurality of baffles. Each of the columns encloses a polygonal structure. Each of the baffles is arranged from bottom to top between two adjacent columns to enclose the maintenance space. Both ends of the baffle are hermetically clamped with the corresponding column, and adjacent baffles are hermetically clamped with each other.

[0011] Further, a plurality of grooves extending along the length of the column are formed on the outer side wall of the column, and both ends of the baffle are slidably clamped in the corresponding grooves.

[0012] Further, a stepped groove is formed on each of the upper and lower sides of the baffle, and the upper and lower stepped grooves are staggered. Adjacent baffles are clamped via the stepped grooves.

[0013] Further, the enclosure body further includes a plurality of first sealing strips, and each of the first sealing strips is respectively disposed in the corresponding groove.

[0014] Further, the enclosure body further includes a plurality of second sealing strips, and each of the second sealing strips is respectively disposed in the corresponding stepped groove.

[0015] Further, the sealing mechanism further includes a water inlet pipe. One end of the water inlet pipe is communicated with the water bag, and the other end of the water inlet pipe is used to be communicated with the outlet end or the inlet end of a water pump to pump water into the water bag or pump the water in the water bag out.

[0016] Further, a through groove penetrating the column is formed at the bottom of each of the columns, and the lower surface of the through groove is open. Each through groove is used to place the water bag. The limiting mechanism includes at least three supporting plates, and each of the supporting plates is respectively detachably disposed in the corresponding through groove and is located below the water bag.

[0017] Further, a sliding groove is formed on each of the two side walls of the through groove, and both sides of the supporting plate are respectively slidably disposed in the corresponding sliding groove.

[0018] Further, the limiting mechanism further includes at least three limiting plates. The limiting plates are L-shaped structures and are arranged between adjacent columns. The two ends of each limiting plate are detachably and fixedly connected to the corresponding columns via screws. The limiting plates and the baffle enclose a limiting cavity with an open lower surface, and each limiting cavity is used to place a water bag.

[0019] Compared with the prior art, the beneficial effects of the present utility model include: when in use, the water retaining enclosure is placed in the pool by a crane, and the underwater sewage treatment equipment to be repaired is located in the repair space. Since the water bag is restricted by the limiting mechanism and will not float on the water surface, the water bag after being filled with water has a deformable structure and can tightly abut against the outer side wall of the enclosure body and the bottom surface of the pool under the restriction of the limiting mechanism, so as to seal the gap between the bottom surface of the enclosure body and the bottom surface of the pool. Then, a water pump is used to pump out the sewage in the repair space and discharge it to the outside of the enclosure body. Then, the maintenance personnel enter the repair space to repair the underwater sewage treatment equipment. In the present utility model, the gap between the bottom surface of the enclosure body and the bottom surface of the pool can be sealed by the air bag. When the sewage in the repair space is pumped out, the sewage in the pool will not seep into the repair space from the gap between the bottom surface of the enclosure body and the bottom surface of the pool, and has a good water retaining effect. Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of a water retaining enclosure for repairing an underwater sewage treatment equipment provided by the present utility model;

[0021] Figure 2 is Figure 1 a three-dimensional structural schematic diagram of the water retaining enclosure for repairing an underwater sewage treatment equipment in [reference number] with the limiting plates omitted;

[0022] Figure 3 is Figure 1 a three-dimensional structural schematic diagram of a column of the water retaining enclosure for repairing an underwater sewage treatment equipment in [reference number];

[0023] Figure 4 is Figure 1 a three-dimensional structural schematic diagram of the water retaining enclosure for repairing an underwater sewage treatment equipment in [reference number] when the upper and lower adjacent baffles are clamped;

[0024] Figure 5 is Figure 2 a three-dimensional structural schematic diagram of a supporting plate of the water retaining enclosure for repairing an underwater sewage treatment equipment in [reference number];

[0025] Figure 6 is Figure 1 a three-dimensional structural schematic diagram of a limiting plate of the water retaining enclosure for repairing an underwater sewage treatment equipment in [reference number];

[0026] In the figure: 100 - retaining wall body, 110 - column, 111 - card slot, 112 - through slot, 1121 - sliding slot, 120 - baffle plate, 121 - stepped slot, 200 - limiting mechanism, 210 - supporting plate, 220 - limiting plate. Detailed implementation manner

[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] The present utility model provides a water-blocking retaining wall for overhauling an underwater sewage treatment device, and its structure is as Figure 1 and Figure 2 shown, including a retaining wall body 100, a sealing mechanism and a limiting mechanism 200. The retaining wall body 100 is a closed structure to enclose a maintenance space. The sealing mechanism includes a water bag, which is a closed structure and is arranged around the outside of the retaining wall body 100. Water is contained in the water bag. The limiting mechanism 200 is detachably fixed to the outer side wall of the retaining wall body 100 and is used to limit the water bag so that the water bag presses against the outer side wall of the retaining wall body 100 and the bottom surface of the water pool.

[0029] During use, the water-blocking retaining wall is placed in the water pool by a crane, and the underwater sewage treatment device to be overhauled is located in the maintenance space. Since the water bag is restricted by the limiting mechanism 200, it will not float on the water surface. The water bag after being filled with water has a deformable structure and can press against the outer side wall of the retaining wall body 100 and the bottom surface of the water pool under the restriction of the limiting mechanism 200, so as to seal the gap between the bottom surface of the retaining wall body 100 and the bottom surface of the water pool. Then, a blower is used to continuously send fresh air into the space above the liquid level in the water pool to dilute and blow out toxic and harmful gases such as H2S, NH3-N, and CO in the water pool, and increase the O2 concentration in the water pool. Then, a water pump is used to pump out the sewage in the maintenance space and discharge it outside the retaining wall body 100. Finally, a gas detector is used to detect the concentration of toxic and harmful gases such as H2S, NH3-N, and CO in the maintenance space until the concentration of the detected gas is stably lower than the safety critical concentration. Then, maintenance personnel enter the maintenance space to overhaul the underwater sewage treatment device. In the present utility model, the gap between the bottom surface of the retaining wall body 100 and the bottom surface of the water pool can be sealed by the air bag. When the sewage in the maintenance space is pumped out, the sewage in the water pool will not seep into the maintenance space from the gap between the bottom surface of the retaining wall body 100 and the bottom surface of the water pool, and has a good water-blocking effect.

[0030] As a preferred embodiment, please refer to Figure 1 andFigure 2 The enclosure body 100 includes at least three columns 110 and a plurality of baffles 120. Each of the columns 110 encloses a polygonal structure. Each of the baffles 120 is arranged between two adjacent columns 110 from bottom to top to enclose the maintenance space. The two ends of the baffle 120 are hermetically clamped to the corresponding columns 110, and the adjacent upper and lower baffles 120 are hermetically clamped to each other. This water retaining enclosure adopts a prefabricated structure, with high disassembly and assembly efficiency, and is convenient for transportation and storage.

[0031] As a preferred embodiment, please refer to Figure 1 and Figure 3 On the outer side wall of the column 110, a plurality of card slots 111 are formed, all of which extend along the length of the column 110. The two ends of the baffle 120 are slidably clamped in the corresponding card slots 111. Through the card slots 111, the baffle 120 can be positioned, making the installation of the baffle 120 more firm.

[0032] As a preferred embodiment, please refer to Figure 1 and Figure 4 On the upper and lower sides of the baffle 120, a stepped groove 121 is formed. The upper and lower stepped grooves 121 are staggered. The adjacent baffles 120 are clamped through the stepped grooves 121, which can make the connection of the baffles 120 more stable.

[0033] As a preferred embodiment, the enclosure body 100 further includes a plurality of first sealing strips. Each of the first sealing strips is respectively arranged in the corresponding card slot 111 to seal the connection between the baffle 120 and the card slot 111 through the first sealing strip.

[0034] As a preferred embodiment, the enclosure body 100 further includes a plurality of second sealing strips. Each of the second sealing strips is respectively arranged in the corresponding stepped groove 121 to seal the connection between the adjacent baffles 120 through the second sealing strip.

[0035] As a preferred embodiment, the sealing mechanism further includes a water inlet pipe. One end of the water inlet pipe is communicated with the water bag, and the other end of the water inlet pipe is used to be communicated with the outlet end or the inlet end of the water pump to pump water into the water bag or pump the water in the water bag out. When pumping water into the water bag, the other end of the water inlet pipe is communicated with the outlet end of the water pump, and the water pump is started to pump water into the water bag. When pumping the water in the water bag out, the other end of the water inlet pipe is communicated with the inlet end of the water pump, and the water pump is started to pump the water in the water bag out.

[0036] As a preferred embodiment, the sealing mechanism further includes a valve. The valve is arranged on the water inlet pipe to control the on-off of the water inlet pipe.

[0037] As a preferred embodiment, please refer to Figure 2 and Figure 3 , a through groove 112 penetrating the column 110 is formed at the bottom of each column 110, the lower surface of the through groove 112 is open, a water bag is placed in each through groove 112, the limiting mechanism 200 includes at least three supporting plates 210, each supporting plate 210 is detachably arranged in the corresponding through groove 112 and is located below the water bag. By removing each supporting plate 210, the water bag can be placed into each through groove 112, and then by installing each supporting plate 210, the water bag can be supported and limited by the supporting plate 210 to prevent the water bag from falling during consignment.

[0038] As a preferred embodiment, please refer to Figure 3 , a sliding groove 1121 is formed on both side walls of the through groove 112, and both sides of the supporting plate 210 are slidably arranged in the corresponding sliding groove 1121, and the supporting plate 210 can be positioned through the sliding groove 1121.

[0039] As a preferred embodiment, please refer to Figure 1 and Figure 6 , the limiting mechanism 200 further includes at least three limiting plates 220, the limiting plate 220 is in an L-shaped structure and is arranged between adjacent columns 110, both ends of the limiting plate 220 are detachably fixed to the corresponding column 110 via screws, the limiting plate 220 and the baffle 120 enclose a limiting cavity with an open lower surface, and a water bag is placed in each limiting cavity. The water bag can be limited by the limiting plate 220 to prevent the water bag from floating in the water or on the water surface due to the buoyancy of the water after entering the water, and the gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool cannot be sealed.

[0040] As a preferred embodiment, the top of the enclosure body 100 is not less than 0.3 m higher than the highest water level of the pool.

[0041] As a preferred embodiment, the sealing mechanism further includes a water stop ring, the water stop ring is arranged around the outside of each limiting plate 220, the width of the water stop ring is 120 - 200 mm, and a flexible waterproof sealing material with the same width as the water stop ring is fixed to the water stop ring through strong glue to further improve the sealing performance.

[0042] As a preferred embodiment, the enclosure body 100 is fabricated by on-site welding of 6mm diamond plate, without bottom at both the top and bottom. The planar dimension of the enclosure body 100 is reduced by 10 cm on each side according to the size of the maintenance opening at the top of the pool. The height of the enclosure body 100 is determined by comprehensively considering the minimum working requirements for manual operation at the bottom of the pool and the lowest water level controlled by the submersible pump in the first phase and first step. To improve the sealing performance of the enclosure body 100, the bottom is sealed with flexible waterproof materials. The pump foundation is made of stainless steel channel steel and fixed to the bottom plate using stainless steel expansion bolts.

[0043] As a preferred embodiment, the construction sequence is as follows: approval of the safety construction plan - safety technical disclosure - handling of operation procedures - emergency drill for confined spaces - ventilation and air exchange - water level control - flushing the sludge in the installation area with fire water - detection of toxic and harmful gases and oxygen content in the pool - placement of the cofferdam - sealing of the bottom of the cofferdam with flexible materials - discharging the sludge and sewage inside the cofferdam - confirmation of the waterproof effect of the cofferdam (the position of the flexible materials can be readjusted and the sludge and sewage inside the cofferdam can be continuously discharged until there is no leakage) - installation of the pump steel foundation - installation of the base, coupling and guide rod support - removal of the cofferdam and sealing materials - installation of the outlet pipe.

[0044] As a preferred embodiment, organize personnel for safety disclosure, organize rescue emergency drills, arrange 2 gas detectors to detect the concentration of toxic and harmful gases in the pool, and 2 axial flow fans to continuously supply air downward in relays. The first person entering the well wears a positive pressure breathing apparatus when entering the pool for the first time, and 2 supervisors are assigned to ensure that personnel can "go down and come up". Strictly implement the confined space operation permit system to ensure construction safety. The construction greatly reduces the communication and coordination work of the owner unit, avoids the external conditions of drainage and sludge removal required by the conventional installation plan, reduces the labor intensity of workers, saves the sludge treatment cost, and ensures the continuous operation of the sewage treatment plant. It is also applied in the installation of the submersible mixer in the subsequent regulating pool and the installation of the central riser of the aeration pipe in the aerobic pool, with remarkable economic effects.

[0045] To better understand the present invention, the working principle of the technical solution of the present invention will be described in detail below in conjunction with Figure 1 - Figure 6 :

[0046] During use, assemble this water retaining enclosure. Arrange each baffle 120 from bottom to top, and slidably engage the two ends of each baffle 120 in the corresponding card slots 111. Place the water bag in each through slot 112 and each limiting cavity, and then install each supporting plate 210. The water bag can be supported and limited by the supporting plate 210. Insert a long rod spray gun around the underwater equipment to be repaired. Pass compressed air into the nozzle of the spray gun to blow away impurities such as stones, sand grains, and branches on the bottom surface of the pool around the equipment, so as to avoid the gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool due to the existence of these impurities. Place this water retaining enclosure in the pool by a crane, and make the underwater sewage treatment equipment to be repaired located in the repair space. Inflate the water bag. Since the water bag is restricted by each through slot 112 and each limiting plate 220, it will not float on the water surface. The inflated water bag has a deformable structure and can tightly press against the outer side wall of the baffle 120 and the bottom surface of the pool under the restriction of each through slot 112 and each limiting plate 220, so as to seal the gap between the bottom surface of the baffle 120 and the bottom surface of the pool. Then, use a blower to continuously send fresh air into the space above the liquid level in the pool to dilute and blow out toxic and harmful gases such as H2S, NH3-N, and CO in the pool, and increase the O2 concentration in the pool. Then, use a water pump to pump out the sewage in the repair space and discharge it outside the enclosure body 100. Finally, use a gas detector to detect the concentration of toxic and harmful gases such as H2S, NH3-N, and CO in the repair space until the concentration of the detected gas is stably lower than the safety critical concentration. Then, maintenance personnel enter the repair space to repair the underwater sewage treatment equipment. In the present utility model, the gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool can be sealed by the air bag. When the sewage in the repair space is pumped out, the sewage in the pool will not seep into the repair space through the gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool, and has a good water retaining effect.

[0047] The water retaining enclosure for overhauling underwater sewage treatment equipment provided by the present utility model has the following beneficial effects:

[0048] (1) This water retaining enclosure adopts a prefabricated structure, with high disassembly and assembly efficiency, and is convenient for transportation and storage;

[0049] (2) The water bag can be supported and limited by the supporting plate 210 to prevent the water bag from falling during transportation. The water bag can be limited by the limiting plate 220 to prevent the water bag from floating in the water or on the water surface due to the buoyancy of water after entering the water, and thus cannot seal the gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool;

[0050] (3) The gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool can be sealed by the airbag. When the sewage in the maintenance space is pumped out, the sewage in the pool will not seep into the maintenance space through the gap between the bottom surface of the enclosure body 100 and the bottom surface of the pool, which has a good water blocking effect.

[0051] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A water retaining enclosure for the maintenance of underwater sewage treatment equipment, characterized in that, Including: A retaining wall body, which is a closed structure and encloses a maintenance space; A sealing mechanism, which includes a water bag. The water bag is a closed structure and is disposed around the outer side of the retaining wall body. Water is contained in the water bag; A limiting mechanism, which is detachably and fixedly connected to the outer side wall of the retaining wall body and is used to limit the water bag so that the water bag presses against the outer side wall of the retaining wall body and the bottom surface of the water pool.

2. The water retaining enclosure for overhauling the underwater sewage treatment equipment according to claim 1, wherein, The retaining wall body includes at least three columns and a plurality of baffles. Each of the columns encloses a polygonal structure. Each of the baffles is arranged from bottom to top between two adjacent columns to enclose the maintenance space. Both ends of the baffle are hermetically clamped to the corresponding columns, and the adjacent baffles above and below are hermetically clamped to each other.

3. The water-blocking enclosure for the maintenance of the underwater sewage treatment equipment according to claim 2, wherein, A plurality of card slots extending along the length of the column are formed on the outer side wall of the column. Both ends of the baffle are slidably clamped in the corresponding card slots.

4. The water-blocking enclosure for the maintenance of the underwater sewage treatment equipment according to claim 2, wherein, A stepped groove is formed on both the upper and lower sides of the baffle. The upper and lower stepped grooves are arranged staggeredly, and the adjacent baffles are clamped to each other through the stepped grooves.

5. The water-blocking enclosure for maintenance of the underwater sewage treatment equipment according to claim 3, characterized in that, The retaining wall body further includes a plurality of first sealing strips, and each of the first sealing strips is respectively disposed in the corresponding card slot.

6. The water retaining enclosure for overhauling the underwater sewage treatment equipment according to claim 4, characterized in that, The retaining wall body further includes a plurality of second sealing strips, and each of the second sealing strips is respectively disposed in the corresponding stepped groove.

7. The water-blocking enclosure for the maintenance of the underwater sewage treatment equipment according to claim 1, wherein, The sealing mechanism further includes a water inlet pipe. One end of the water inlet pipe is communicated with the water bag, and the other end of the water inlet pipe is used to be communicated with the outlet end or the inlet end of a water pump to pump water into the water bag or pump the water in the water bag out.

8. The water-blocking enclosure for overhauling the underwater sewage treatment equipment according to claim 2, characterized in that, A through groove penetrating the column is formed at the bottom of each of the columns. The lower surface of the through groove is open. Each of the through grooves is used to place the water bag. The limiting mechanism includes at least three supporting plates, and each of the supporting plates is respectively detachably disposed in the corresponding through groove and is located below the water bag.

9. The water-blocking enclosure for the maintenance of the underwater sewage treatment equipment according to claim 8, characterized in that, A sliding groove is formed on both side walls of the through groove. Both sides of the supporting plate are respectively slidably disposed in the corresponding sliding grooves.

10. The water-blocking enclosure for overhauling the underwater sewage treatment equipment according to claim 8, characterized in that, The limiting mechanism further includes at least three limiting plates. The limiting plates are L-shaped structures and are disposed between adjacent columns. Both ends of the limiting plates are respectively detachably and fixedly connected to the corresponding columns through screws. The limiting plates and the baffles enclose a limiting cavity with an open lower surface, and each of the limiting cavities is used to place the water bag.

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