A type of underground rectangular pool

Abstract

This utility model discloses an underground rectangular pool, including a pool body with an isolation zone. Three oil drain pipes are arranged sequentially from bottom to top within the isolation zone. Each oil drain pipe has a slidable closure. A first transmission rod is hinged to the closure facing the isolation zone, and a second transmission rod is hinged to the other end of the first transmission rod. The other end of the second transmission rod is hinged to the inlet of the oil drain pipe. A telescopic rod is also hinged at the connection between the first and second transmission rods, with its other end extending into the isolation zone. A float is fixed to the end of the telescopic rod within the isolation zone. In this utility model, the three oil drain pipes allow the closures within the drain pipes to open or close as the float rises and falls with the water level. This allows naturally separated grease to be discharged through the corresponding drain pipe height, effectively separating and discharging grease while preventing excessive oil buildup when the drainage volume is small.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment building technology, and in particular to an underground rectangular pool. Background Technology

[0002] An oil separator is a wastewater pretreatment structure designed based on the density difference between oil and water. Its core function is to separate floating oil and water in oily wastewater to prevent grease from clogging pipes and ensure the smooth operation of the drainage system.

[0003] Most existing grease traps are of horizontal flow type. In the grease trap, wastewater first enters the pretreatment zone, where large particles of fixed residue, such as food scraps and vegetable leaves, are initially intercepted by grids or filters. After pretreatment, the wastewater then enters the separation chamber, where the flow rate decreases. Due to its lower density, the grease floats to the surface, while the water settles to the bottom. The floating grease is collected through an oil collection tank or an automatic oil discharge device, while the separated clean water is discharged from the bottom.

[0004] However, for large grease traps, due to their large volume, it takes a long time for grease and water to settle to the height of a typical drain pipe. This not only easily leads to the continuous accumulation of grease in the tank and the thickening of the grease layer, making it impossible for newly entering grease to float and separate effectively, resulting in a decrease in grease treatment efficiency, but also makes it easy for grease that is not discharged in time to solidify, causing pipe blockage. If the height of the drain pipe is lowered, when the discharge volume at the water inlet pipe is large, it is easy for grease that has not been completely separated to be discharged together with water, increasing the burden on subsequent work. Utility Model Content

[0005] The purpose of this invention is to provide an underground rectangular pool to solve the above-mentioned problems.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides an underground rectangular pool, including a pool body with an isolation zone inside. Three oil drain pipes are arranged sequentially from bottom to top within the isolation zone, and each of the three oil drain pipes has a portion that is funnel-shaped and expands towards the discharge direction. A slidable closure is installed inside each oil drain pipe. A first transmission rod is hinged to the side of the closure facing the isolation zone. A second transmission rod is hinged to the other end of the first transmission rod. The other end of the second transmission rod is hinged to the inlet of the oil drain pipe. A telescopic rod is also hinged at the connection between the first and second transmission rods. The other end of the telescopic rod extends into the isolation zone, and a float is fixed to the end of the telescopic rod located within the isolation zone.

[0007] In one embodiment, an oil scraper is slidably disposed inside the oil drain pipe, and a connecting rod is fixedly disposed at one end of the oil scraper facing the sealing member, and the other end of the connecting rod is fixedly connected to the sealing member.

[0008] In one embodiment, the oil scraper includes an annular assembly and a plurality of bidirectional scrapers, the bidirectional scrapers being fixed to the outside of the annular assembly, and both blades of the bidirectional scrapers being slidably abutting against the wall of the oil drain pipe.

[0009] In one embodiment, a limiting groove is also provided inside the oil drain pipe, and limiting members are fixed on both sides of the sealing member, the limiting members being slidably embedded in the limiting groove.

[0010] In one embodiment, scrapers are fixed on both sides of the limiting member, and the scrapers can slide against the inner wall of the limiting groove.

[0011] In one embodiment, the bidirectional scraper includes an inner silicone component and an outer metal component, wherein the inner silicone component is fixedly connected to an annular assembly, and the outer metal component is fixedly sleeved on the inner silicone component.

[0012] In one embodiment, the float is cone-shaped with its center of gravity located at the bottom.

[0013] The advantages or beneficial effects of the above technical solutions include at least the following: In this invention, three oil drain pipes—low, medium, and high—are provided, corresponding to the three stages of wastewater discharge. Through the cooperation of the telescopic rod, the first transmission rod, and the second transmission rod, the closed part inside the oil drain pipe can be opened or closed as the float rises and falls with the water level. This allows the naturally separated grease to be discharged through the corresponding height of the oil drain pipe. This not only effectively separates and discharges the grease but also prevents the oil layer from accumulating too thickly when the drainage volume is small, ultimately enabling this oil separator to effectively purify wastewater. Attached Figure Description

[0014] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0015] Figure 1 This is a schematic diagram of the planar structure of the pool body after it has been cut apart in this utility model.

[0016] Figure 2 for Figure 1 Enlarged schematic diagram of the structure of section A in the middle.

[0017] Reference numerals: 1. Pool body; 2. Isolation zone; 3. Oil drain pipe; 4. Sealing component; 5. First transmission rod; 6. Second transmission rod; 7. Telescopic rod; 8. Float; 9. Oil scraper; 901. Annular assembly; 902. Bidirectional scraper; 9021. Inner silicone component; 9022. Outer metal component; 10. Connecting rod; 11. Limiting groove; 12. Limiting component; 13. Scraper blade. Detailed Implementation

[0018] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "a" and "a plurality of" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0023] Reference Figure 1 and Figure 2A buried rectangular pool includes a pool body 1, within which an isolation zone 2 is provided. Three oil drain pipes 3 are arranged sequentially from bottom to top within the isolation zone 2: a low-level drain pipe 3, a middle-level drain pipe 3, and a high-level drain pipe 3. Each of the three drain pipes 3 has a portion that is funnel-shaped and expands towards the discharge direction. A slidable sealing element 4 is installed within each drain pipe 3. A first transmission rod 5 is hinged to the side of the sealing element 4 facing the isolation zone 2. A second transmission rod 6 is hinged to the other end of the first transmission rod 5. The other end of the second transmission rod 6 is hinged to the inlet of the drain pipe 3. A telescopic rod 7 is also hinged at the connection between the first transmission rod 5 and the second transmission rod 6. The other end of the telescopic rod 7 extends into the isolation zone 2, and a float is fixed to the end of the telescopic rod 7 located within the isolation zone 2. 8. With this setup, when no wastewater is discharged into the isolation zone 2, the float 8 is located at the bottom of the isolation zone 2. At this time, the three telescopic rods 7 connected to the float 8 are all in their longest extension state, so that the hinge between the first transmission rod 5 and the second transmission rod 6 is in the highest position. Thus, the first transmission rod 5 is closer to the isolation zone 2, causing the sealing member 4 to close the funnel-shaped part of the oil drain pipe 3. When wastewater is discharged into the isolation zone 2, as the water level rises, the float 8 also floats upwards. This not only shortens the extension length of the three telescopic rods 7, but also changes the tilt angle of the telescopic rods 7, causing the hinge between the first transmission rod 5 and the second transmission rod 6 to shift downwards. This causes the first transmission rod 5 to drive the sealing member 4 to move away from the isolation zone 2, opening the funnel part of the oil drain pipe 3. Because the distance between the telescopic rod 7 and the float 8 of the low-level oil drain pipe 3 is the shortest, the funnel-shaped part of the low-level oil drain pipe 3 is opened first. When the wastewater level in the isolation zone 2 rises to the height of the low-level oil drain pipe 3, the telescopic rod 7 connected to the low-level oil drain pipe 3 is at its shortest extension, causing the first transmission rod 5 and the second transmission rod 6 to open to the maximum extent. Therefore, the funnel-shaped part of the low-level oil drain pipe 3 is also opened to the maximum extent. At this time, the grease and water naturally separate, so the grease floating on the surface of the water can be discharged into the next area through the low-level oil drain pipe 3. As the wastewater level continues to rise, the telescopic rod 7 connected to the low-level oil drain pipe 3 extends again, and then raises the hinge joint of the first transmission rod 5 and the second transmission rod 6 again. The first transmission rod 5 moves towards the isolation zone. The movement of the sealing element 4 towards the isolation zone 2 pulls the funnel-shaped portion of the low-level oil drain pipe 3 into place. When the wastewater level surpasses the low-level oil drain pipe 3, the sealing element 4 within the low-level oil drain pipe 3 has completely sealed its funnel-shaped portion. At this point, as the telescopic rod 7 connecting the middle-level oil drain pipe 3 to the float 8 continues to shorten, the sealing element 4 within the middle-level oil drain pipe 3 begins to move away from the isolation zone 2, thereby opening the funnel-shaped portion of the middle-level oil drain pipe 3. Therefore, when the separated grease reaches the position of the middle-level oil drain pipe 3, it can be discharged to the next position from this drain pipe 3. Similarly, as the wastewater level rises again, the sealing element 4 of the middle-level oil drain pipe 3 moves back to seal the funnel-shaped portion, and the sealing element 4 of the high-level oil drain pipe 3 begins to move backward to open the funnel-shaped portion.This system ensures that when the grease reaches this height, it can be discharged from the high-level drain pipe 3 to the next area. Throughout the draining process, a drain pipe at the bottom of the isolation zone 2 continuously discharges wastewater separated from the grease. Therefore, as the drainage volume decreases and the wastewater level drops, the system sequentially switches between the following states: the funnel-shaped section of the high-level drain pipe 3 closes; the funnel-shaped section of the middle-level drain pipe 3 opens; the funnel-shaped section of the middle-level drain pipe 3 closes; the funnel-shaped section of the low-level drain pipe 3 opens; and the funnel-shaped section of the low-level drain pipe 3 closes. This switching between the three drain pipe states corresponds to three periods: a small amount of wastewater discharged into the isolation zone 2, a moderate amount, and a large amount, respectively. This prevents the grease from accumulating for too long, resulting in an excessively thick oil layer, or the water level rising too high before the oil and water have separated, thus achieving effective grease separation.

[0024] In one specific embodiment, since the funnel-shaped portion inside the oil drain pipe 3 expands backward, the bottom of the funnel-shaped portion is tilted downward, which can accelerate the movement of grease and allow the grease to drain to the next area more quickly. Furthermore, as the sealing member 4 moves towards the isolation zone 2, the distance between the wall of the oil drain pipe 3 and the sealing member 4 becomes smaller and smaller, causing the sealing member 4 to press the wall of the oil drain pipe 3 tighter and tighter, so as to prevent wastewater from leaking through the gap between the sealing member 4 and the wall of the oil drain pipe 3.

[0025] Reference Figure 1 An oil scraper 9 is slidably installed inside the oil drain pipe 3. A connecting rod 10 is fixedly installed at one end of the oil scraper 9 facing the sealing member 4, and the other end of the connecting rod 10 is fixedly connected to the sealing member 4. With this arrangement, as the sealing member 4 moves back and forth, the oil scraper 9 can scrape the pipe wall of the oil drain pipe 3 back and forth to scrape off the grease adhering to the pipe wall of the oil drain pipe 3 and discharge it. This avoids the grease from adhering and accumulating on the pipe wall of the oil drain pipe 3 for a long time, which would cause the space inside to become smaller and smaller, resulting in a decrease in discharge volume and affecting the oil discharge efficiency.

[0026] Reference Figure 1 and Figure 2 The oil scraping component 9 includes an annular assembly 901 and multiple bidirectional scrapers 902. The bidirectional scrapers 902 are fixed to the outside of the annular assembly 901, and both blades of the bidirectional scrapers 902 can slide against the wall of the oil drain pipe 3. With this configuration, the bidirectional scrapers 902 can complete two cleaning processes in a single movement of the sealing component 4. The scraper facing the sealing component 4 scrapes off the grease adhering to the wall of the oil drain pipe 3, while the scraper facing away from the sealing component 4 pushes the scraped grease in the direction of movement of the sealing component 4, so that the grease is discharged to the next area or returns to the isolation zone 2 for separation again. Therefore, it can further ensure the cleanliness of the pipe wall, ensure smooth flow of oil, and maintain a stable discharge rate in the long term.

[0027] Reference Figure 1 and Figure 2The drain pipe 3 also has a limiting groove 11. The two sides of the sealing member 4 are fixed with limiting members 12. The limiting members 12 are slidably embedded in the limiting groove 11. With this setting, the limiting members 12 are embedded in the limiting groove 11 to prevent the sealing member 4 from radially deflecting or spinning under the thrust of the first transmission rod 5. This makes the sealing member move only in a straight line along the wall of the drain pipe 3. The double limiting grooves 11 are symmetrically arranged to balance the lateral force on the sealing member 4 and ensure that the movement trajectory is strictly along the axis of the drain pipe 3. At the same time, when the sealing member 4 is forced to move in a straight line, the connecting rod 10 can accurately drive the scraper 9 to move in a straight line. During the movement of the scraper 9, the bidirectional scraper 902 bears the reaction force of the drain pipe 3 wall. At this time, the combination of the limiting member 12 and the limiting groove 11 can prevent the bidirectional scraper 902 from twisting due to resistance and ensure that the scraper head always scrapes the wall of the drain pipe 3 perpendicularly.

[0028] Reference Figure 1 Both sides of the limiting member 12 are fixed with scraper blades 13, which can slide against the inner wall of the limiting groove 11. With this arrangement, as the limiting member 12 moves, the scraper blade 13 on the front side hangs down the sludge in the forward direction of the limiting groove 11, while the scraper blade 13 on the rear side cleans the return residue on the groove wall, so as to prevent the limiting groove 11 from getting stuck due to the accumulation of sludge and affecting the movement of the sealing member 4.

[0029] In one specific embodiment, the base of the scraper 13 is spring steel to provide elasticity, the surface is coated with polytetrafluoroethylene to reduce friction, and the edge of the scraper 13 is attached to the inner wall of the limiting groove 11 with a pre-tightening force of 0.5-2N to form a continuous scraping contact. In this way, when encountering hard particles, the scraper 13 can elastically deform to let the particles pass, so as to prevent hard jamming.

[0030] Reference Figure 2 The bidirectional scraper 902 includes an inner silicone component 9021 and an outer metal component 9022. The inner silicone component 9021 is fixedly connected to the annular assembly 901, and the outer metal component 9022 is fixedly sleeved on the inner silicone component 9021. With this configuration, after the metal blade contacts the oil deposits on the pipe wall, the inner silicone component 9021 is deformed under pressure, allowing the outer metal component 9022 to adaptively conform to the curved surface of the drain pipe 3. When the metal blade cuts through the oil deposits, the inner silicone component 9021 absorbs the scraping recoil force, eliminating blade bounce caused by vibration to ensure scraping continuity. After scraping is completed, the silicone elastically returns to its original shape, pushing the outer metal component 9022 to reset, thus avoiding hard contact and jamming between the metal component and the drain pipe 3 wall.

[0031] In one specific embodiment, the inner silicone component 9021 is made of, but is not limited to, elastic silicone to provide flexible support and vibration damping, and the outer metal component 9022 is not limited to, 316 stainless steel or corrosion-resistant alloy to undertake scraping function and structural strength. The inner silicone component 9021 is bonded or vulcanized to the annular assembly 901, and the outer metal component 9022 is interference-fitted to the inner silicone component 9021, ultimately forming a rigid-elastic composite.

[0032] Reference Figure 1 The float 8 is cone-shaped with its center of gravity at the bottom. This cone shape allows the float 8 to break through the oil layer, ensuring that it always floats at the top of the water. This ensures that the telescopic rod 7 moves accurately with changes in water level. The bottom center of gravity also ensures that the float 8 always has its cone tip facing upward, preventing it from tilting due to water surface swaying.

[0033] In one specific embodiment, the pool body 1 is made of reinforced concrete, which has the following advantages: First, reinforced concrete can withstand external loads such as soil pressure and groundwater buoyancy, and can effectively resist the infiltration of internal sewage, reducing the risk of leakage and avoiding pollution of groundwater and surrounding soil. Furthermore, concrete itself is corrosion-resistant and anti-aging, and with the reinforcement of steel bars, the service life of the pool body 1 can reach more than 70 years, far exceeding that of materials such as plastic and glass, reducing later replacement costs. Second, whether in soft soil foundations, high water levels, or cold regions, the reinforced concrete pool body 1 can adapt to the environment through reasonable design, and is not prone to cracking due to foundation settlement or temperature changes. It can be directly buried in areas with heavy vehicle traffic, such as roads and parking lots, without additional reinforcement, while materials such as plastic require careful consideration of environmental factors. Thirdly, the hard surface of reinforced concrete can resist the pressure of biogas and the impact of debris inside the pool, reducing maintenance needs. The inner wall can be smoothed to reduce dirt adhesion, making it easy to clean regularly without structural damage caused by mechanical operations during cleaning. Fourthly, the density of concrete itself, combined with waterproofing during construction, can effectively prevent sewage leakage, protecting groundwater resources and soil ecology. Reinforced concrete is mainly composed of natural or industrial materials such as cement, sand, and steel bars, without releasing harmful chemicals. It can also be recycled after disposal, with minimal environmental impact. Fifthly, for large or irregularly shaped pools, on-site casting can be used to adapt to different site sizes. Small pools can be prefabricated and hoisted, shortening the construction cycle. The volume and structure can be flexibly designed according to the number of users and usage scenarios to meet different sewage discharge requirements.

[0034] In one specific embodiment, the rectangular pool body 1 can solve the problem of water leakage at the joints caused by the non-integral molding of the circular pool body 1 in the existing market, and effectively improve the compressive strength and impermeability of the pool body 1, avoiding the problem of the circular pool body easily collapsing when it is topped by heavy vehicles. At the same time, the protective layer thickness of the rectangular pool body 1 is greater than that of the circular one, which not only improves its corrosion resistance, but also greatly reduces the carbonation process of concrete and extends the service life of the entire pool body 1.

[0035] In one specific embodiment, the pool body 1 of this utility model is 13 meters long, 2.8 meters wide, and 0.3 meters thick. After structural calculation, this size has the advantages of low total cost and fast construction speed while meeting the requirements of quality, use and structural safety. It is generally half the construction period of conventional cast-in-place pool bodies, and can greatly reduce the risk of safety accidents in deep foundation pit projects. It can be widely promoted.

[0036] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., 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.

[0037] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A buried rectangular pool, comprising a pool body (1), wherein an isolation zone (2) is provided within the pool body (1), characterized in that: The isolation zone (2) is provided with three oil drain pipes (3) arranged from bottom to top. Each of the three oil drain pipes (3) has a part that is funnel-shaped and expands in the direction of discharge. Each oil drain pipe (3) is provided with a slidable sealing member (4). The sealing member (4) is hinged to a first transmission rod (5) on the side facing the isolation zone (2). The other end of the first transmission rod (5) is hinged to a second transmission rod (6). The other end of the second transmission rod (6) is hinged to the inlet of the oil drain pipe (3). The connection between the first transmission rod (5) and the second transmission rod (6) is also hinged to a telescopic rod (7). The other end of the telescopic rod (7) extends into the isolation zone (2). A float (8) is fixed to the end of the telescopic rod (7) located in the isolation zone (2).

2. The buried rectangular pool according to claim 1, characterized in that: An oil scraper (9) is slidably provided inside the oil drain pipe (3). A connecting rod (10) is fixedly provided at one end of the oil scraper (9) facing the sealing member (4), and the other end of the connecting rod (10) is fixedly connected to the sealing member (4).

3. The buried rectangular pool according to claim 2, characterized in that: The oil scraper (9) includes an annular assembly (901) and multiple bidirectional scrapers (902). The bidirectional scrapers (902) are fixed on the outside of the annular assembly (901), and both blades of the bidirectional scrapers (902) can slide against the wall of the oil drain pipe (3).

4. The buried rectangular pool according to claim 1, characterized in that: The drain pipe (3) is also provided with a limiting groove (11), and the two sides of the sealing member (4) are fixed with limiting members (12), which are slidably embedded in the limiting groove (11).

5. A buried rectangular pool according to claim 4, characterized in that: Both sides of the limiting member (12) are fixed with scrapers (13), which slide against the inner wall of the limiting groove (11).

6. A buried rectangular pool according to claim 3, characterized in that: The bidirectional scraper (902) includes an inner silicone component (9021) and an outer metal component (9022). The inner silicone component (9021) is fixedly connected to the annular assembly (901), and the outer metal component (9022) is fixedly sleeved on the inner silicone component (9021).

7. A buried rectangular pool according to claim 1, characterized in that: The float (8) is conical and its center of gravity is located at the bottom.

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