Floating ball type anti-backflow well cover

Abstract

The utility model discloses a kind of anti-inversion well covers of floating ball, it is related to urban drainage facilities technical field, including by inspection well pedestal, well lid body, drain grate component, U-shaped grating frame is formed, the inside of U-shaped grating frame is placed with floating ball, the floating ball is moved up under the buoyancy of anti-inversion water flow, for plugging operation to drainage passage.The utility model is through being provided with floating ball, completely utilize the power of water flow itself to drive floating ball action, without external power or manual intervention, response is quick, degree of automation is high, and by the structural setting of first guide component or second guide component, in the case where floating ball outer diameter is less than the diameter of U-shaped grating frame inner wall, it can keep stable floating track, so guarantee the function stability of anti-inversion, and by the structural setting of floating ball outer diameter less than the diameter of U-shaped grating frame inner wall, small impurities between floating ball and U-shaped grating frame can be avoided, so that floating ball can keep long-time stable operation.

Description

Technical Field

[0001] This utility model relates to the field of urban drainage facilities technology, specifically a float-type anti-backflow manhole cover. Background Technology

[0002] During heavy rainfall, urban drainage networks often experience a sudden increase in pressure due to instantaneous flow overload or poor downstream drainage, causing rainwater to backflow through manhole covers onto the road surface and exacerbating urban flooding. Existing anti-backflow technologies, such as hinged check plates, suffer from problems such as mechanical structures being easily blocked by debris, poor sealing, or slow response, resulting in insufficient reliability. Some complex electric control devices are costly and power-dependent, making them unsuitable for the harsh environments of municipal facilities. Therefore, a passive anti-backflow solution that is simple in structure, requires no external power, responds quickly, and has good sealing is needed. Based on this, a float-type anti-backflow manhole cover is provided. Utility Model Content

[0003] The purpose of this utility model is to provide a float-type anti-backflow manhole cover in order to solve the problems mentioned above.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a float-type anti-backflow manhole cover, comprising a manhole cover assembly consisting of a manhole base, a manhole cover body, and a drainage grate. The manhole base is installed on the manhole cover body. A drainage channel penetrating the bottom of the manhole base is formed in the middle of the manhole base. The drainage grate covers the top of the drainage channel to filter large debris and allow rainwater to flow in. A U-shaped grid frame is bolted to the bottom of the manhole base. A float is placed inside the U-shaped grid frame. The float moves upward under the buoyancy of the backflowing water to block the drainage channel.

[0005] As a further embodiment of this utility model: a flow guide is fixed at the bottom of the inspection well base at the drainage channel. The flow guide is in the shape of an inverted funnel or a cylinder, and the diameter of the float is larger than the diameter of the flow guide port at the lower end of the flow guide.

[0006] As a further improvement of this utility model: a first guide component is provided between the drainage grate and the U-shaped grid frame, which penetrates the float. The first guide component is used to limit the upward trajectory of the float. The first guide assembly includes a first guide rod, a pin, a base plate, and a docking post; The first guide rod passes through the drain grate, float ball, and bottom plate sequentially from the top of the drain grate. The bottom plate passes horizontally through the bottom end of the first guide rod to achieve mutual positioning of the first guide rod and the bottom plate. The float has a through hole in the middle for the first guide rod to pass through; The docking posts are symmetrically fixed to the bottom of the base plate. The bottom of the U-shaped grid frame is provided with a positioning hole a through which the docking posts and the bottom of the first guide rod pass. The docking posts and the bottom of the first guide rod are inserted into the positioning hole to provide positioning for the vertical state of the first guide rod. The first guide rod is used to guide the buoy to rise.

[0007] As a further embodiment of this utility model: the first guide component can be replaced by a second guide component, the second guide component including a bolt through guide hole and a second guide rod; The second guide rod is fixed to the top of the bolt through guide hole. The bottom of the U-shaped grid frame is provided with a screw hole for the bolt through guide hole to be threaded. The second guide rod passes through the bolt through guide hole from bottom to top and is inserted into the float. The float is provided with a non-through guide hole that matches the second guide rod. The buoy floats along the trajectory of the second guide rod through a non-through guide hole, thus defining the trajectory.

[0008] As a further embodiment of this utility model: when the U-shaped grid frame is provided with a first guide component and a second guide component, the outer diameter of the float is smaller than the inner wall diameter of the U-shaped grid frame and larger than the diameter of the guide port at the lower end of the flow guide shroud.

[0009] Compared with the prior art, the beneficial effects of this utility model are: By setting up a float, the movement of the float is driven entirely by the power of the water flow itself, without the need for external power or manual intervention. It is responsive and highly automated. Furthermore, through the structural design of the first or second guide component, the float can maintain a stable upward trajectory even when its outer diameter is smaller than the inner diameter of the U-shaped grid frame. This ensures the stability of the anti-backflow function. The structural design of the float's outer diameter being smaller than the inner diameter of the U-shaped grid frame also avoids the retention of small impurities between the float and the U-shaped grid frame, allowing the float to maintain stable operation for a long time. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a structural diagram of the present invention when the first guide component is installed; Figure 4 This is a split schematic diagram of the first guide component of this utility model; Figure 5 This is a cross-sectional schematic diagram of the second guide component, the U-shaped grid frame, and the float of this utility model.

[0011] In the diagram: 1. Manhole cover assembly; 101. Inspection manhole base; 102. Manhole cover body; 103. Drainage grate; 104. Flow guide; 2. U-shaped grid frame; 3. Float; 4a. First guide assembly; 401. First guide rod; 402. Pin; 403. Base plate; 404. Connecting post; 4b. Second guide assembly; 405. Bolt; 406. Second guide rod; 5a. Through guide hole; 5b. Non-through guide hole; 6a. Positioning hole; 6b. Screw hole. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figures 1-5 In this embodiment of the utility model, a float-type anti-backflow manhole cover includes a manhole cover assembly 1 consisting of a manhole seat 101, a manhole cover body 102, and a drainage grate 103. The manhole seat 101 is installed on the manhole cover body 102. A drainage channel penetrating the bottom of the manhole seat 101 is formed in the middle of the manhole seat 101. The drainage grate 103 covers the top of the drainage channel and is used to filter large debris and allow rainwater to flow in. A U-shaped grid frame 2 is bolted to the bottom of the manhole seat 101. A float 3 is placed inside the U-shaped grid frame 2. The float 3 moves upward under the buoyancy of the backflow water flow and is used to block the drainage channel. The bottom of the manhole base 101 is fixed with a flow guide 104 at the drainage channel. The flow guide 104 is in the shape of an inverted funnel or a cylinder, and the diameter of the float 3 is larger than the diameter of the flow guide port at the lower end of the flow guide 104.

[0014] In this embodiment, it should be noted that the float 3 is made of a lightweight material with a density less than that of water (such as a foam ball, a hollow plastic ball, or a hollow metal ball). The working status and operating principle of this float-type anti-backflow manhole cover are as follows: Normal drainage state: When there is water on the road surface and the water level in the pipe is lower than the bottom of the well, rainwater flows in through the drainage grate 103 on the manhole cover body 101 and is smoothly discharged into the downstream pipe through the guide hood 104. At this time, the float 3 is stationary under the guide hood due to its own weight and is supported by the U-shaped grid frame 2, and the drainage channel is unobstructed. Anti-backflow state: When the drainage pipe is overloaded and the internal pressure increases, causing water to backflow, the backflow water flows from bottom to top and impacts the float 3. Under the combined action of strong buoyancy and water flow impact, the float 3 quickly floats up until it tightly presses against the guide port at the lower end of the guide cover 104. Since the diameter of the float 3 is larger than the guide port, an effective mechanical seal is formed, blocking the channel of the backflow water and preventing it from overflowing from the drainage grate 103 on the manhole cover body 101 onto the road surface. State recovery: When the pressure in the pipeline drops, the backflow of water subsides, and the water level in the well decreases, the buoyancy acting on float 3 decreases, and float 3 automatically falls under its own weight, detaches from the guide port, and returns to the normal drainage state, ready for the next drainage cycle.

[0015] Please refer to this carefully. Figures 3-4 A first guide component 4a is provided between the drainage grate 103 and the U-shaped grid frame 2, which penetrates the float 3. The first guide component 4a is used to limit the upward trajectory of the float 3. The first guide assembly 4a includes a first guide rod 401, a pin 402, a base plate 403, and a docking post 404; The first guide rod 401 passes through the top of the drain grate 103, the float ball 3, and the bottom plate 403 in sequence. The bottom plate 403 passes horizontally through the bottom end of the first guide rod 401, which is used to realize the mutual limiting of the first guide rod 401 and the bottom plate 403. The middle part of the float 3 is provided with a through hole 5a for the first guide rod 401 to pass through; The docking posts 404 are symmetrically fixed to the bottom of the base plate 403. The bottom of the U-shaped grid frame 2 is provided with positioning holes 6a for the docking posts 404 and the bottom of the first guide rod 401 to pass through. The docking posts 404 and the bottom of the first guide rod 401 are inserted into the positioning holes 6a to provide positioning for the vertical state of the first guide rod 401. The first guide rod 401 is used to guide the upward movement of the float 3.

[0016] In this embodiment, the assembly of the first guide component 4a with the float 3 is performed as follows: By passing the first guide rod 401 through the through-hole 5a on the drain grate 103 and the float 3, and then fitting the base plate 403 onto the first guide rod 401, and then removing the pin 402 to pass through the first guide rod 401, the assembly of the first guide rod 401 and the float 3 is achieved. (It should be noted that the drain grate 103 has an inverted convex hole for the first guide rod 401 to pass through and be stored, the bottom of the first guide rod 401 has a hole for the pin 402 to be inserted, and the base plate 403 has a center hole that matches the first guide rod 401.) Next, the U-shaped grid frame 2 is installed with the manhole cover body 102. During this process, the base plate 403 is rotated and adjusted so that the two docking posts 404 on the base plate 403 and the bottom end of the first guide rod 401 are aligned with the three positioning holes 6a at the bottom of the U-shaped grid frame 2 and inserted. In this way, after the U-shaped grid frame 2 is fixed, the first guide rod 401 can be kept in a stable vertical state. When the float 3 rises due to buoyancy in the later stage, the first guide rod 401 and the through guide hole 5a can limit the upward trajectory of the float 3, so that the float 3 is precisely aligned with the guide port at the lower end of the guide shroud 104, ensuring a stable seal of the guide port at the lower end of the guide shroud 104.

[0017] Please refer to this carefully. Figures 3-5 The first guide component 4a can be replaced by the second guide component 4b, which includes a bolt through guide hole 405 and a second guide rod 406. The second guide rod 406 is fixed to the top of the bolt through guide hole 405. The bottom of the U-shaped grid frame 2 is provided with a screw hole 6b for the bolt through guide hole 405 to be threaded. The second guide rod 406 passes through the bolt through guide hole 405 from bottom to top and is inserted into the float 3. The float 3 is provided with a non-through guide hole 5b that matches the second guide rod 406. The float 3 floats along the trajectory of the second guide rod 406 through the non-through guide hole 5b, thus limiting the trajectory.

[0018] In this embodiment: by cooperating with the second guide rod 406 and the non-through guide hole 5b, the upward trajectory of the float 3 can also be limited. Under normal conditions, the second guide rod 406 is completely housed inside the non-through guide hole 5b, which can reduce the phenomenon of small impurities in the water flow adhering to the second guide rod 406, and further ensure the upward flexibility of the float 3. It should be further explained that during the up-and-down movement of the float 3, the buoyancy or the weight of the float 3 itself can scrape the fine impurities remaining on the outer walls of the first guide rod 405 and the second guide rod 406, so that the float 3 can maintain normal up-and-down movement. The structure of the second guide rod 406 is only to further reduce the situation of fine impurities remaining on the outer wall, so as to further ensure the stable operation of the float 3.

[0019] Please refer to this carefully. Figures 1-3 When the U-shaped grid frame 2 is provided with the first guide component 4a and the second guide component 4b, the outer diameter of the float 3 is smaller than the inner wall diameter of the U-shaped grid frame 2 and larger than the diameter of the guide port at the lower end of the guide shroud 104.

[0020] In this embodiment: through the structural arrangement of the first guide component 4a and the second guide component 4b, the float 3 can maintain a stable upward trajectory when its outer diameter is smaller than the inner wall diameter of the U-shaped grid frame 2, thus ensuring the stability of the anti-backflow function. In addition, if the outer diameter of the float 3 is smaller than the inner diameter of the U-shaped grid frame 2, there will be an angle between the contact position of the float 3 and the U-shaped grid frame 2, which will easily accumulate small impurities. This will affect the floating flexibility of the float 3. However, by setting the outer diameter of the float 3 to be smaller than the inner diameter of the U-shaped grid frame 2, the outer wall of the float 3 does not contact the inner wall of the U-shaped grid frame 2, which can avoid the accumulation of small impurities between the float 3 and the U-shaped grid frame 2, and enable the float 3 to maintain stable operation for a long time.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A float-type anti-backflow manhole cover, comprising a manhole cover assembly (1) consisting of a manhole seat (101), a manhole cover body (102), and a drainage grate (103), wherein the manhole seat (101) is installed on the manhole cover body (102), a drainage channel penetrating the bottom of the manhole seat (101) is formed in the middle of the manhole seat (101), and the drainage grate (103) covers the top of the drainage channel for filtering large debris and allowing rainwater to flow in, characterized in that, The bottom of the inspection well base (101) is bolted with a U-shaped grid frame (2), and a float (3) is placed inside the U-shaped grid frame (2). The float (3) moves upward under the buoyancy of the backflow water flow to block the drainage channel.

2. The float-type anti-backflow manhole cover according to claim 1, characterized in that, The bottom of the inspection well base (101) is fixed with a flow guide (104) at the drainage channel. The flow guide (104) is in the shape of an inverted funnel or a cylinder. The diameter of the float (3) is larger than the diameter of the flow guide port at the lower end of the flow guide (104).

3. A float-type anti-backflow manhole cover according to claim 1, characterized in that, A first guide component (4a) is provided between the drainage grate (103) and the U-shaped grid frame (2) to pass through the float (3). The first guide component (4a) is used to limit the upward trajectory of the float (3). The first guide assembly (4a) includes a first guide rod (401), a pin (402), a base plate (403), and a docking post (404). The first guide rod (401) passes through the drain grate (103), float (3), and bottom plate (403) sequentially from the top of the drain grate (103). The bottom plate (403) passes horizontally through the bottom end of the first guide rod (401) to achieve mutual limiting between the first guide rod (401) and the bottom plate (403). The float (3) has a through hole (5a) in the middle for the first guide rod (401) to pass through. The docking column (404) is symmetrically fixed to the bottom of the base plate (403). The bottom of the U-shaped grid frame (2) is provided with a positioning hole (6a) through which the bottom of the docking column (404) and the first guide rod (401) pass. The bottom of the docking column (404) and the first guide rod (401) are inserted into the positioning hole (6a) to provide positioning for the vertical state of the first guide rod (401). The first guide rod (401) is used to guide the upward movement of the float (3).

4. A float-type anti-backflow manhole cover according to claim 3, characterized in that, The first guide assembly (4a) may be replaced by a second guide assembly (4b), which includes a bolt through guide hole (405) and a second guide rod (406). The second guide rod (406) is fixed to the top of the bolt through guide hole (405). The bottom of the U-shaped grid frame (2) is provided with a screw hole (6b) for threaded connection of the bolt through guide hole (405). The second guide rod (406) passes through the bolt through guide hole (405) from bottom to top and is inserted into the float (3). The float (3) is provided with a non-through guide hole (5b) that matches the second guide rod (406). The float (3) floats along the trajectory of the second guide rod (406) through the non-through guide hole (5b), thus limiting the trajectory.

5. A float-type anti-backflow manhole cover according to claim 4, characterized in that, When the U-shaped grid frame (2) is provided with a first guide component (4a) and a second guide component (4b), the outer diameter of the float (3) is smaller than the inner wall diameter of the U-shaped grid frame (2) and larger than the diameter of the flow guide port at the lower end of the flow guide shroud (104).

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