Double sealing layer anti-leakage structure for gate of rain and sewage pumping station

Abstract

The utility model discloses a kind of double sealing layer anti-leakage structures for rain sewage pumping station gate, belong to rain sewage pumping station gate sealing technical field.The structure is aimed at the problem that the existing gate sealing device is prone to wear, aging or failure due to single sealing layer, which increases the risk of leakage, and improves the sealing reliability by adopting double sealing layer design.The technical scheme points include: gate frame, gate plate movably arranged in the frame channel, and main sealing assembly and auxiliary sealing assembly respectively installed on the front and back of the frame;The main sealing assembly is located on the side of the frame facing the water flow direction;The auxiliary sealing assembly is located on the side of the frame facing away from the water flow direction;Form double sealing barrier.The structure is mainly used for rain sewage pumping station gate system, can effectively prevent sewage or rainwater leakage, improve the safety and stability of pumping station operation, reduce maintenance requirements, and prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for stormwater and sewage pumping station gates. More specifically, this utility model relates to a double-sealing-layer leak-proof structure for stormwater and sewage pumping station gates. Background Technology

[0002] In stormwater and sewage pumping stations, gates are crucial equipment for preventing reverse water flow, and their sealing performance directly affects the station's operational efficiency and environmental safety. Currently, most common gate sealing structures employ a single-layer seal, meaning only one sealing strip is installed on the water-facing side of the gate frame. This single-layer sealing structure has certain limitations in practical use. Because gates need to be frequently opened and closed, and are subjected to long-term water flow impact, silt abrasion, and media corrosion, a single sealing strip is prone to localized wear, elasticity failure, or permanent deformation, leading to inadequate sealing. Once this primary sealing layer fails, liquid leakage will occur. For pumping stations transporting stormwater and sewage, leakage not only wastes energy but may also cause environmental pollution and pose safety hazards to equipment operation. Attempts to improve the effect by strengthening the material or structure of the single sealing strip have yielded limited improvements in reliability. If a backup seal is considered, how to arrange a second seal within the limited installation space of the gate and ensure that both seals form effective and reliable contact with the gate, while avoiding overly complex structures or interference with the normal opening and closing of the gate, is a challenge in practical applications. Summary of the Invention

[0003] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0004] The purpose of this utility model is to provide a double-sealing-layer anti-leakage structure for gates of rainwater and sewage pumping stations. It addresses the problem that the leakage risk of gate sealing devices in the prior art is increased due to the easy wear, aging or failure of a single sealing layer. By adopting a double-sealing-layer design, the sealing reliability is improved, which can effectively prevent sewage or rainwater leakage, improve the safety and stability of pumping station operation, reduce maintenance needs, and extend the service life of equipment.

[0005] To achieve the objectives and other advantages of this utility model, a double-sealing-layer leak-proof structure for stormwater and sewage pumping station gates is provided, comprising: Gate frame; A gate, which is movably disposed within the channel formed by the gate frame; The main sealing assembly is disposed on the side of the gate frame facing the water flow direction and surrounds the periphery of the channel; the main sealing assembly includes a main sealing strip and a main pressure plate; the main sealing strip is fixedly installed in the sealing groove on the front of the gate frame by the main pressure plate and fasteners, and the sealing lip of the main sealing strip is in close contact with the front of the gate plate in the closed state; A secondary sealing assembly is disposed on the side of the gate frame facing away from the water flow direction and also surrounds the periphery of the channel; the secondary sealing assembly includes a secondary sealing strip and a secondary pressure plate; the secondary sealing strip is fixedly installed in the sealing groove on the back of the gate frame by the secondary pressure plate and fasteners, and the sealing lip of the secondary sealing strip is in close contact with the back of the gate plate in the closed state.

[0006] Preferably, the double-sealing leak-proof structure for the stormwater and sewage pumping station gate also includes: Multiple support components are arranged at intervals along the circumference of the gate. One end of each support component is connected to the main sealing assembly, and the other end is connected to the secondary sealing assembly.

[0007] Preferably, the sealing lip of the main sealing strip is positioned facing the direction of the water flow.

[0008] Preferably, the sealing lip of the secondary sealing strip is positioned away from the direction of the water flow.

[0009] Preferably, the gate frame is provided with a water collection tank for collecting and guiding leaked liquid. The water collection tank is embedded in the bottom sill and located at the bottom of the sealing cavity formed by the main sealing assembly and the secondary sealing assembly.

[0010] Preferably, a leakage inlet pipe is connected to the bottom of the water collection tank.

[0011] Preferably, both the main pressure plate and the auxiliary pressure plate are detachable structures and are fixed to the gate frame by bolts.

[0012] This utility model has at least the following beneficial effects: First, the double-sealing-layer leak-proof structure for stormwater and sewage pumping station gates of this utility model forms a double-sealing barrier by adding a secondary sealing component on the opposite side of the main sealing component. This layout significantly improves the redundancy and reliability of the sealing system. When the sealing effect of the main sealing layer decreases due to wear, aging, or accidental damage, the secondary sealing layer can serve as an effective backup defense to continue preventing media leakage, thereby greatly enhancing the leak-proof safety guarantee capability of the entire gate structure.

[0013] Secondly, the double-sealing-layer leak-proof structure for stormwater and sewage pumping station gates of this utility model enhances the structural integrity and rigidity of the entire sealing frame by setting up support components connecting the main and auxiliary sealing components. This helps to maintain the stability of the main and auxiliary sealing strips when the gate is opened and closed or subjected to water flow pressure, ensuring that their sealing lips can maintain a continuous, uniform, and tight contact with the gate plate, preventing sealing failure due to structural deformation, and extending the service life of the sealing components.

[0014] Third, the double-sealing-layer anti-leakage structure for stormwater and sewage pumping station gates of this utility model, by setting the sealing lip of the main sealing strip towards the direction of water flow, can utilize water pressure to make the sealing lip adhere more tightly to the front of the gate plate when the gate is closed. This self-tightening sealing effect enhances the sealing effect on the main flow, especially under conditions of high water pressure, it can actively increase the sealing contact pressure and improve the initial sealing performance.

[0015] Fourth, the double-sealing-layer anti-leakage structure for stormwater and sewage pumping station gates of this utility model sets the sealing lip of the secondary sealing strip away from the water flow, so that it mainly acts to block a small amount of leaking liquid that may permeate through the main sealing layer. This arrangement allows the secondary sealing layer to more effectively block and contain the inwardly leaking medium, further consolidating the sealing effect of the second line of defense and improving the overall reliability of the anti-leakage structure.

[0016] Fifth, the double-sealing-layer leak-proof structure for stormwater and sewage pumping station gates of this utility model can collect any trace amounts of liquid that may leak from the main sealing layer by setting a water collection tank between the two sealing layers. This design enables real-time monitoring of the sealing status (by observing whether there is liquid seepage), while preventing leaked liquid from remaining in the sealing chamber and causing corrosion or erosion to components such as the gate frame, which is beneficial for long-term equipment maintenance.

[0017] Sixth, the double-sealing leak-proof structure of the stormwater and sewage pumping station gate of this utility model, by connecting a leak lead pipe at the bottom of the collection tank, can guide the collected leaked liquid to a designated collection point or drainage system in an organized manner. This not only facilitates the monitoring and subsequent treatment of the leakage, but also maintains the cleanliness and safety of the equipment site, and avoids secondary problems that may be caused by disorderly flow.

[0018] Seventh, the double-sealing-layer leak-proof structure for stormwater and sewage pumping station gates of this utility model simplifies the inspection, replacement, and maintenance of the sealing strips by designing the main pressure plate and the auxiliary pressure plate as detachable structures fixed by bolts. This greatly reduces the difficulty and time cost of later maintenance, facilitates the rapid restoration of the equipment to its optimal sealing condition, and improves the maintainability and economy of the equipment.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the side of the double-sealing layer anti-leakage structure for the gate of a rainwater and sewage pumping station according to an embodiment of the present invention, facing the direction of water flow. Figure 2This is a top view of a double-sealing-layer leak-proof structure for a stormwater and sewage pumping station gate according to an embodiment of this utility model; Figure 3 This is a side cross-sectional view of a double-sealing-layer leak-proof structure for a stormwater and sewage pumping station gate according to an embodiment of the present invention; Reference numerals in the attached drawings: 1. Gate frame, 2. Gate plate, 3. Main sealing strip, 4. Main pressure plate, 5. Secondary sealing strip, 6. Secondary pressure plate, 7. Support component, 8. Water collection tank, 9. Leakage inlet pipe. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be noted that, unless otherwise specified, the control methods in the following technical solutions are conventional methods, and the equipment structures, unless otherwise specified, can be obtained commercially.

[0025] like Figures 1-3 This utility model provides a method comprising: Gate frame 1; Gate 2 is movably disposed within the channel formed by the gate frame 1; The main sealing assembly is disposed on the side of the gate frame 1 facing the water flow direction and surrounds the periphery of the channel; the main sealing assembly includes a main sealing strip 3 and a main pressure plate 4; the main sealing strip 3 is fixedly installed in the sealing groove on the front of the gate frame 1 by the main pressure plate 4 and fasteners, and the sealing lip of the main sealing strip 3 is in close contact with the front of the gate plate 2 in the closed state; A secondary sealing assembly is disposed on the side of the gate frame 1 facing away from the water flow direction and also surrounds the periphery of the channel; the secondary sealing assembly includes a secondary sealing strip 5 and a secondary pressure plate 6; the secondary sealing strip 5 is fixedly installed in the sealing groove on the back of the gate frame 1 by the secondary pressure plate 6 and fasteners, and the sealing lip of the secondary sealing strip 5 is in close contact with the back of the gate plate 2 in the closed state.

[0026] In the above technical solution, the gate frame 1 constitutes the main supporting part of the entire structure, and its interior forms a channel for fluid passage. The gate plate 2 is movably installed within the channel of the gate frame 1 and can move up and down under the drive of the opening and closing mechanism to realize the opening or closing of the channel. The main sealing assembly is installed on the side of the gate frame 1 facing the water flow direction, i.e., the water-facing side, and surrounds the perimeter of the channel. The main sealing assembly consists of a main sealing strip 3 and a main pressure plate 4. The main sealing strip 3 is pressed and fixed in the sealing groove on the front of the gate frame 1 by the main pressure plate 4 and fasteners such as bolts. When the gate plate 2 is closed, the sealing lip of the main sealing strip 3 is tightly fitted with the front of the gate plate 2, forming the first sealing barrier. The secondary sealing assembly is installed on the side of the gate frame 1 away from the water flow direction, i.e., the back-water side, and also surrounds the perimeter of the channel. The secondary sealing assembly consists of a secondary sealing strip 5 and a secondary pressure plate 6. The secondary sealing strip 5 is pressed and fixed in the sealing groove on the back of the gate frame 1 by the secondary pressure plate 6 and fasteners such as bolts. When the gate 2 is closed, the sealing lip of the secondary sealing strip 5 makes tight contact with the back of the gate 2, forming a second sealing barrier. Both the main sealing strip 3 and the secondary sealing strip 5 are made of elastic wear-resistant material to ensure long-term sealing performance. The main pressure plate 4 and the secondary pressure plate 6 are detachable structures, connected by bolts for easy replacement and maintenance of the sealing strips. Both the main pressure plate 4 and the secondary pressure plate 6 are made of 304 stainless steel plate through bending and drilling. For example, using a 304 stainless steel strip with a thickness of 8 mm and a width of 50 mm, cut to the appropriate length according to the perimeter of the sealing groove on the gate frame 1, and then drilling a 14 mm diameter through hole every 150 mm for installing M12 bolts. 304 stainless steel provides excellent corrosion resistance, sufficient to withstand the humid environment of rainwater and sewage pumping stations, while ensuring the necessary structural strength.

[0027] Existing technologies typically only install a single sealing layer on the water-facing side of the gate frame. This single sealing layer is prone to wear or failure under frequent opening and closing, water flow impact, and media corrosion, leading to an increased risk of leakage. This invention adds a secondary sealing component, forming a second sealing layer on the backwater side of the gate frame 1, thus creating a double sealing barrier. When the main sealing strip 3 experiences a decrease in sealing effectiveness due to wear or aging, the secondary sealing strip 5 can still effectively prevent media leakage, significantly improving sealing reliability and safety. Simultaneously, the double sealing layer design avoids interference with the opening and closing movement of the gate plate 2, resulting in a compact and reasonable structure that solves the problem of arranging a backup seal within a limited space.

[0028] In another technical solution, the double-sealing-layer leak-proof structure for the stormwater and sewage pumping station gate also includes: Multiple support members 7 are arranged at intervals around the gate plate 2. One end of each support member 7 is connected to the main sealing assembly, and the other end is connected to the secondary sealing assembly.

[0029] In the above technical solution, multiple support members 7 are added to the double-layer sealing base structure consisting of gate frame 1, gate plate 2, main sealing assembly, and secondary sealing assembly. These support members 7 are preferably rigid connecting rods or bolts, such as 12 mm diameter 304 stainless steel fully threaded bolts, with threads machined at both ends for fitting nuts. Their function is to pass through pre-drilled holes in the gate frame 1, connecting the main pressure plate 4 and secondary pressure plate 6 at both ends, thereby tightening the front and rear sealing assemblies into a single unit and enhancing structural rigidity. They are evenly distributed at certain intervals along the circumferential direction of the gate plate 2. One end of each support member 7 passes through a pre-drilled hole in the gate frame 1 and connects to the main pressure plate 4 that fixes the main sealing strip 3; the other end also passes through the gate frame 1 and connects to the secondary pressure plate 6 that fixes the secondary sealing strip 5. By tightening the nuts at both ends of the support member 7, it can be securely connected to the main pressure plate 4 and secondary pressure plate 6.

[0030] In existing single-layer or simple double-layer sealing structures, there is a lack of direct rigid connection between the sealing pressure plates on the front and rear sides. When the gate is subjected to uneven water flow pressure, frequent opening and closing, or external loads for a long time, the gate frame 1 may undergo slight deformation, resulting in uneven distribution of the clamping force between the main sealing strip 3 and the secondary sealing strip 5, or even local separation of the sealing lip from the gate plate 2, ultimately leading to sealing failure.

[0031] This invention rigidly connects the main sealing assembly and the secondary sealing assembly into a single frame by setting multiple circumferentially distributed support members 7. This structure significantly enhances the overall rigidity and stability of the sealing system under pressure. The support members 7 act as internal reinforcing ribs, effectively resisting the deformation tendency of the gate frame 1 and ensuring that the sealing lips of the main sealing strip 3 and the secondary sealing strip 5 maintain uniform, stable, and tight contact pressure with the gate plate 2 across the entire contact circumference. This not only directly solves the problem of decreased sealing reliability caused by structural deformation but also reduces abnormal wear of the sealing strips by maintaining stable contact conditions, thereby extending the service life of the sealing assembly.

[0032] In another technical solution, the sealing lip of the main sealing strip 3 is positioned facing the direction of the water flow.

[0033] When installing the main sealing strip 3, its elastic sealing lip should be clearly oriented towards the direction of the incoming water flow. When the gate 2 is closed to block the water flow, the water pressure acting on the front of the gate 2 will directly act on the sealing lip of the main sealing strip 3. Based on its own elastic pre-tightening force, the sealing lip is pushed by the water pressure, thus pressing more tightly against the sealing contact surface of the gate 2. The main sealing strip 3 can be made of polyurethane with a lip-shaped cross-section and a Shore A hardness of approximately 70 degrees, with its sealing lip facing the direction of water flow to play a core role in active sealing and wear resistance. The advantage of this shape is that when the gate 2 is closed and subjected to water pressure, the water pressure acts on the back of the sealing lip, pushing it more tightly against the sealing surface of the gate 2, forming a "self-tightening" sealing effect; the greater the pressure, the better the sealing effect. The body of the sealing strip is usually rectangular or trapezoidal to securely embed into the sealing groove formed by the gate frame 1 and the main pressure plate 4. The main sealing strip 3 directly withstands the mainstream high-pressure water flow, potentially contained solid particles (such as silt), and chemical corrosion from rainwater and sewage. Therefore, its material must possess extremely high wear resistance, a good elastic recovery coefficient, and resistance to media corrosion. A polyurethane strip with a Shore A hardness of approximately 70 is selected. This material combines excellent mechanical strength, wear resistance, and sufficient elasticity, making it ideal as the preferred material for the main sealing strip.

[0034] In existing technologies, the directionality of the sealing lip of the sealing strip may not be fully considered, or the seal may rely solely on the installation preload to achieve a seal. This static sealing method may experience a decrease in contact pressure under long-term use or pressure fluctuations, leading to a decline in sealing effectiveness.

[0035] This invention creates a "self-tightening" sealing mechanism by specifically aligning the sealing lip of the main sealing strip 3 towards the direction of water flow. Water pressure is no longer a factor attempting to disrupt the seal; instead, it transforms into a beneficial force enhancing the sealing effect. Higher water pressure results in a stronger pushing force on the sealing lip, causing a tighter fit between it and the gate 2, thereby dynamically improving the sealing reliability and effectiveness of the main sealing layer under high water pressure conditions. This design cleverly utilizes the energy of the working medium itself to actively improve sealing performance.

[0036] In another technical solution, the sealing lip of the secondary sealing strip 5 is positioned away from the direction of water flow.

[0037] When installing the secondary sealing strip 5, its elastic sealing lip is clearly positioned away from the direction of the incoming water flow. This means that the sealing lip of the secondary sealing strip 5 faces the interior of the sealing cavity formed by the main sealing assembly and the secondary sealing assembly on the gate frame 1. When the gate 2 is closed, even if a very small amount of liquid penetrates the first line of defense formed by the main sealing strip 3, this leaked liquid will enter the sealing cavity and act on the back of the sealing lip of the secondary sealing strip 5. The shape of the secondary sealing strip 5 can also be designed as a lip-shaped sealing strip. However, its sealing lip is positioned away from the direction of the incoming water flow, i.e., facing the interior of the sealing cavity formed by the main and secondary sealing strips and the gate. This shape makes it specifically designed to intercept minute amounts of leaked liquid that may penetrate the main sealing strip 3. When liquid accumulates in the sealing cavity and generates slight pressure, this pressure also acts on the back of the secondary sealing lip, enhancing its sealing contact with the back of the gate 2. The working environment of the secondary sealing strip 5 is relatively mild, mainly contacting small amounts of liquid that may leak, but it still needs to have good elasticity and corrosion resistance. The material can be a rubber material with better corrosion resistance, such as chloroprene rubber (CR) or ethylene propylene diene monomer (EPDM). For example, EPDM with a Shore A hardness between 60 and 70 is selected. This material has excellent water resistance, aging resistance, ozone resistance and weak acid and alkali resistance. It can maintain its elasticity in humid environments for a long time, making it very suitable as a secondary sealing strip material for backup sealing.

[0038] Existing technologies typically only have one main seal and lack a second sealing line. Even if some designs incorporate a backup seal, the direction of the sealing lip may not be optimized for intercepting leaking liquid, resulting in an unsatisfactory sealing effect.

[0039] This invention, by specifically positioning the sealing lip of the secondary sealing strip 5 facing away from the water flow, clearly defines its function: specifically designed to intercept and seal any small amount of media that may leak from the main sealing layer. When leaking liquid enters the sealing cavity and generates pressure, this pressure acts on the back of the sealing lip of the secondary sealing strip 5, pushing the sealing lip to adhere more tightly to the back of the gate 2, creating a self-tightening effect. This targeted directional design ensures that the secondary sealing strip 5 can most effectively perform its sealing function as a backup defense, greatly improving the overall reliability of the double-sealing layer structure and ensuring effective prevention of further media leakage in the event of main seal failure.

[0040] In another technical solution, the gate frame 1 is provided with a water collection tank 8 for collecting and guiding the leaked liquid. The water collection tank 8 is embedded in the bottom threshold and located at the bottom of the sealing cavity formed by the main sealing assembly and the secondary sealing assembly.

[0041] At the bottom sill of the gate frame 1, a groove is machined or cast to form a water collection trough 8. The water collection trough 8 is embedded inside the sill structure, and its longitudinal position is exactly at the bottom of the sealing cavity formed by the gate frame 1, the closed gate plate 2, the main sealing strip 3, and the secondary sealing strip 5.

[0042] In the case of a leak in a single-layer sealing structure of existing technology, the leaked liquid usually accumulates disorderly at the bottom of the gate frame 1 or flows towards the equipment foundation. This not only makes it difficult to visually determine whether the sealing condition is good, but the accumulated liquid (especially corrosive rainwater and sewage) will soak and corrode the bottom structure and fasteners of the gate frame 1 for a long time, accelerating equipment damage and posing safety and hygiene hazards to the operating environment.

[0043] This invention provides an effective solution to the aforementioned problems by embedding a water collection tank 8 within the threshold of the gate frame 1 corresponding to the bottom of the sealing cavity. This water collection tank 8 actively collects any trace amounts of liquid that may leak from the main sealing strip 3. This design achieves two key functions: First, it serves a monitoring function, allowing operation and maintenance personnel to visually and promptly determine whether the sealing performance of the main sealing strip 3 has declined by observing whether liquid accumulates in the water collection tank 8, thus enabling early warning maintenance. Second, it provides protection by systematically collecting potentially corrosive leaked liquid, isolating it from the main structure and fasteners of the gate frame 1, preventing corrosion damage caused by liquid retention, effectively protecting the equipment, and extending its service life.

[0044] In another technical solution, a leakage inlet pipe 9 is connected to the bottom of the water collection tank 8.

[0045] An outlet is made at the bottom of the water collection tank 8, which is embedded in the bottom sill of the gate frame 1, and a leakage lead pipe 9 (a section of unplasticized PVC plastic pipe with a nominal diameter of DN25, i.e., 1 inch, connected to the bottom of the water collection tank 8 via a connector) is sealed to the outlet. The other end of the leakage lead pipe 9 is led to a designated safe collection point or drainage system.

[0046] Even existing technologies that include structures for collecting leaked liquids often consist of simple collection tanks. The collected liquid remains in the tank, requiring regular manual cleaning; otherwise, overflowing will still cause on-site pollution. This method cannot achieve continuous, automated liquid removal, is inconvenient for monitoring and maintenance, and carries the risk of secondary leaks.

[0047] This invention achieves organized drainage of collected liquid by connecting a leakage inlet pipe 9 to the bottom of the water collection tank 8. This design upgrades passive collection to active guidance. The direct technical problem it solves is preventing overflow or disorderly flow of leaked liquid within the water collection tank 8, thus maintaining the dryness and cleanliness of the equipment foundation and preventing pollution and safety hazards in the working environment. Simultaneously, this structure makes monitoring the leakage rate more convenient; the sealing performance of the main sealing strip 3 can be determined by observing the flow rate at the outlet of the leakage inlet pipe 9, providing a clear basis for preventative maintenance. Ultimately, this design improves the standardization and safety of the entire pump station operation.

[0048] In another technical solution, both the main pressure plate 4 and the auxiliary pressure plate 6 are detachable structures and are fixed to the gate frame 1 by bolts.

[0049] Both the main pressure plate 4 and the auxiliary pressure plate 6 are designed as independent, detachable components. Threaded holes are pre-drilled near the sealing grooves on the front and back of the gate frame 1. During installation, the main sealing strip 3 is placed into the sealing groove on the front of the gate frame 1, then the main pressure plate 4 is placed on top. Finally, bolts are passed through the mounting holes on the main pressure plate 4 and screwed into the threaded holes of the gate frame 1. The main sealing strip 3 is then tightened and secured. The auxiliary sealing strip 5 and the auxiliary pressure plate 6 are installed in the same manner on the back of the gate frame 1.

[0050] In existing technologies, the sealing strip's pressure plate may be fixed to the gate frame by welding or integral casting. This permanent connection method makes it extremely difficult to replace the sealing strip when it wears or ages. It often requires on-site cutting and welding, or even disassembling the entire gate frame 1 for repair, resulting in a huge workload, long downtime, and high maintenance costs.

[0051] This invention solves the core problem of inconvenient maintenance of sealing components by designing the main pressure plate 4 and the auxiliary pressure plate 6 as detachable structures fixed by bolts. When it is necessary to inspect or replace the main sealing strip 3 or the auxiliary sealing strip 5, maintenance personnel only need to use tools to loosen and remove the fixing bolts to remove the main pressure plate 4 or the auxiliary pressure plate 6, and then maintain or replace the sealing strip. The operation is simple and quick, requiring no special tools or large equipment, greatly shortening maintenance time, reducing maintenance difficulty and cost, and significantly improving the maintainability and economy of the equipment. This design makes regular inspection and preventive maintenance feasible, helping to maintain the equipment in optimal sealing condition for a long time.

[0052] Although the technical solution of this utility model has been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A double sealing layer leak-proof structure for a gate of a combined sewer pump station, characterized in that, include: Gate frame; A gate, which is movably disposed within the channel formed by the gate frame; The main sealing assembly is disposed on the side of the gate frame facing the water flow direction and surrounds the periphery of the channel; the main sealing assembly includes a main sealing strip and a main pressure plate; the main sealing strip is fixedly installed in the sealing groove on the front of the gate frame by the main pressure plate and fasteners, and the sealing lip of the main sealing strip is in close contact with the front of the gate plate in the closed state; A secondary sealing assembly is disposed on the side of the gate frame facing away from the water flow direction and also surrounds the periphery of the channel; the secondary sealing assembly includes a secondary sealing strip and a secondary pressure plate; the secondary sealing strip is fixedly installed in the sealing groove on the back of the gate frame by the secondary pressure plate and fasteners, and the sealing lip of the secondary sealing strip is in close contact with the back of the gate plate in the closed state.

2. The double seal layer leak-proof structure for the gate of the rain sewage pump station according to claim 1, characterized in that, Also includes: Multiple support components are arranged at intervals along the circumference of the gate. One end of each support component is connected to the main sealing assembly, and the other end is connected to the secondary sealing assembly.

3. The double seal layer leak-proof structure for the gate of the rain sewage pump station according to claim 1, characterized in that, The sealing lip of the main sealing strip is positioned facing the direction of the water flow.

4. The double seal layer leak-proof structure for the gate of the rain sewage pump station according to claim 1, characterized in that, The sealing lip of the secondary sealing strip is positioned away from the direction of water flow.

5. The double seal layer leak-proof structure for the gate of the rain sewage pump station according to claim 1, characterized in that, The gate frame is provided with a water collection tank for collecting and guiding leaked liquid. The water collection tank is embedded in the bottom sill and located at the bottom of the sealing cavity formed by the main sealing assembly and the secondary sealing assembly.

6. The double seal layer leak-proof structure for the gate of the rain and sewage pump station according to claim 5, characterized in that, A leakage inlet pipe is connected to the bottom of the water collection tank.

7. The double seal layer leak-proof structure for the gate of the rain and sewage pump station according to claim 1, characterized in that, Both the main pressure plate and the auxiliary pressure plate are detachable structures and are fixed to the gate frame with bolts.

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