Improved float valve

Abstract

The utility model relates to the technical field of pontoon valves, in particular to an improved pontoon valve which comprises a pontoon valve shell, a front baffle and a drainage hole, the front baffle is fixedly installed at the front end of the pontoon valve shell, the drainage hole is fixedly formed in the middle of the front baffle, and a pontoon valve opening and closing structure is arranged on the outer side of the front baffle. A float valve anti-backflow flap valve structure is arranged on the inner side of the float valve shell. According to the improved float valve, the flap valve can turn over and rotate along the movable pin, when the water level on the other side of the float valve shell is too high, backward flowing is prone to occurring, but the water level on the outer side can generate pressure intensity for extruding the flap valve, and the flap valve can be attached to the partition plate under water pressure to seal the through hole; in this way, the installation working condition adaptability is good, the equipment cost is low, manual operation is not needed, external force control is not needed, and the anti-backflow sealing performance of the built-in flap valve is good.

Description

Technical Field

[0001] This utility model relates to the field of float valve technology, specifically an improved float valve. Background Technology

[0002] A float valve, also known as a self-regulating interceptor or buoyancy valve, is a device that controls the opening and closing of a valve by using a float that rises and falls with the water level. When the water level is low, the float valve is open, allowing the medium to flow. As the water level rises, the float rises under buoyancy, driving a gate to descend via a drive shaft, thus closing the valve. Conversely, when the water level falls, the float descends under gravity, driving the gate to rise, and the valve reopens.

[0003] For example, the authorization announcement number "CN221880269U" describes a type of float valve. By rotating the sealing ring, the threaded column is inserted into the second threaded groove for limiting the position. The sealing ring is installed on the outer wall of the valve, which improves the sealing between the valve and the water passage, facilitating the interception and discharge of sewage. However, existing float valves, traditional float valve devices, are used in sewage interception wells of drainage systems. They rely on changes in the water level in the well and the buoyancy effect to change the opening of the outlet, without the need for external force control. Their advantage is that they do not require external power. Their disadvantage is that due to the structure, when the external water level is high, backflow can occur into the internal pipe network. They have high requirements for actual installation conditions. In coastal cities, the water level rises and falls with the tides. Therefore, when the external water level is relatively high, backflow can easily occur when the float valve is opened. Utility Model Content

[0004] The purpose of this invention is to solve the problem of external water backflow in float valves, and to propose an improved float valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An improved float valve is designed, including a float valve housing, a front baffle, and a drain hole. The front baffle is fixedly installed at the front end of the float valve housing, and the drain hole is fixedly opened in the middle of the front baffle. The outer side of the front baffle is provided with a float valve opening and closing structure, and the inner side of the float valve housing is provided with a float valve anti-backflow flap structure.

[0007] Preferably, the float valve opening and closing structure includes a rotating shaft and a float. The rotating shaft is rotatably connected to the inner side of the outer wall of the front baffle. An active rod is fixedly connected to the front side wall of the rotating shaft. A float is fixedly installed at the other end of the active rod. A hollow cavity is fixedly opened inside the float. A driven rod is fixedly connected to the rear side wall of the rotating shaft. A valve plate is fixedly installed at the other end of the driven rod.

[0008] Preferably, the sidewall of the valve plate is movably connected to the inner side of the drain hole, and the driving rod is arranged perpendicularly to each other via a rotating shaft and a driven rod.

[0009] Preferably, the anti-backflow flap gate structure of the float valve includes a partition and a flap gate. The partition is fixedly installed on the inner side of the float valve shell. The outer wall of the partition is provided with two fixing blocks. Anchor bolts are fixedly connected to the inner side of the two fixing blocks. The two anchor bolts are fixedly connected in the partition. Movable pins are fixedly connected to the inner side of the two fixing blocks. The flap gate is rotatably connected to the outer side of the movable pins.

[0010] Preferably, the partition has a through hole fixedly provided inside, and the outer side of the through hole is movably connected to the inner wall of the flap gate.

[0011] Preferably, a sealing layer is fixedly sleeved on the rear side of the float valve housing.

[0012] The improved float valve proposed in this utility model has the following advantages: the flap gate can be rotated along the movable pin. When the water level on the other side of the float valve shell is too high, backflow is likely to occur. However, the water level on the outside can generate pressure to squeeze the flap gate. The flap gate will adhere to the partition plate under water pressure and seal the through hole. This can prevent the external water level from backflowing into the sewage well on the other side of the float valve. This design has good adaptability to installation conditions, low equipment cost, no need for manual operation or external force control, and the built-in flap gate has good anti-backflow sealing performance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 for Figure 1 Frontal sectional view;

[0015] Figure 3 for Figure 1 A side sectional view;

[0016] Figure 4 for Figure 2 Enlarged diagram of part A in the middle;

[0017] Figure 5 for Figure 3 Enlarged diagram of section B;

[0018] Figure 6 for Figure 3 Enlarged diagram of section C.

[0019] In the diagram: 1. Float valve housing, 2. Front baffle, 3. Drain hole, 4. Float valve opening and closing structure, 41. Rotating shaft, 42. Driven rod, 43. Valve plate, 44. Driving rod, 45. Float, 46. Hollow cavity, 5. Float valve anti-backflow flap gate structure, 51. Partition plate, 52. Fixing block, 53. Anchor bolt, 54. Movable pin, 55. Flap gate, 6. Sealing layer, 7. Through hole. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Example 1:

[0022] Please see Figure 1-6 In this embodiment, an improved float valve includes a float valve housing 1, a front baffle 2, and a drain hole 3. The front baffle 2 is fixedly installed at the front end of the float valve housing 1. The float valve housing 1 is made of high-strength aluminum alloy material, which has the function of being dirt-resistant and rust-proof. The float valve housing 1 is fixed in the sewage interception well of the drainage system by concrete pouring. The drain hole 3 is fixedly opened in the middle of the front baffle 2. A circular drain hole 3 for discharging sewage is hollowed out in the middle of the front baffle 2. The outer side of the front baffle 2 is provided with a float valve opening and closing structure 4, and the inner side of the float valve housing 1 is provided with a float valve anti-backflow flap structure 5.

[0023] The float valve opening and closing structure 4 includes a rotating shaft 41 and a float 45. The rotating shaft 41 is rotatably connected to the inner side of the outer wall of the front baffle 2. The rotating shaft 41 can rotate along the inside of the front baffle 2. An active rod 44 is fixedly connected to the front side wall of the rotating shaft 41. The active rod 44 is designed to be relatively long and can connect the float 45 and the rotating shaft 41 on the outer side. The other end of the active rod 44 is fixedly installed with the float 45. The float 45 can be made of aluminum alloy hollow cylinder. A hollow cavity 46 is fixedly opened inside the float 45. The hollow cavity 46 inside the float 45 can increase the buoyancy of the float. Since the float valve shell 1 is set in the sewage well, the rise of the water level in the well can use buoyancy to push the float 45 up and down.

[0024] When the water level is low, the float 45 is not affected by buoyancy. The active rod 44 and the float 45 will stand vertically downward under the action of gravity. When the water level rises, the float 45 will be continuously pushed upward. The rising float 45 will drive the rotating shaft 41 to rotate. The rotation of the other side of the rotating shaft 41 will drive the driven rod 42 to rotate. The driven rod 42 will push the valve plate 43 to open. After the valve plate 43 leaves the drain hole 3, the sewage in the well water can flow outward and be discharged. The driven rod 42 is fixedly connected to the rear side wall of the rotating shaft 41, and the valve plate 43 is fixedly installed at the other end of the driven rod 42.

[0025] The side wall of the valve plate 43 is movably connected to the inner side of the drain hole 3. When the well water level drops, the float 45 loses buoyancy and falls. Under the linkage, the valve plate 43 re-blocks the drain hole 3. The driving rod 44 is set perpendicular to each other through the rotating shaft 41 and the driven rod 42.

[0026] The anti-backflow flap gate structure 5 of the float valve includes a partition 51 and a flap gate 55. The partition 51 is fixedly installed on the inner side of the float valve housing 1. The partition 51 separates the drainage space of the valve plate 43 inside the front baffle 2 from the external drainage space. The outer wall of the partition 51 is provided with two fixing blocks 52. The fixing blocks 52 are made of stainless steel. The fixing blocks 52 are firmly nailed to the partition 51 by anchor bolts 53. The inner sides of the two fixing blocks 52 are fixedly connected with anchor bolts 53. The two anchor bolts 53 are fixedly connected in the partition 51.

[0027] The inner sides of the two fixed blocks 52 are fixedly connected with movable pins 54. The flap gate 55 is designed as a circular metal plate slightly larger than the through hole 7. The flap gate 55 can rotate along the movable pin 54. When the water level on the other side of the float valve housing 1 is too high, backflow is likely to occur. However, the water level on the outside can generate pressure to squeeze the flap gate 55. The flap gate 55 will stick to the partition plate 51 under water pressure and seal the through hole 7. This will prevent the external water level from backflowing into the sewage well on the other side of the float valve. The flap gate 55 is rotatably connected to the outer side of the movable pin 54.

[0028] The drainage space inside the valve plate 43 of the front baffle 2 is separated from the external drainage space by the partition 51. The fixing block 52 is made of stainless steel and is firmly nailed to the partition 51 by the anchor bolt 53. The flap gate 55 is designed as a circular metal plate slightly larger than the through hole 7. The flap gate 55 can be rotated along the movable pin 54. When the water level on the other side of the float valve housing 1 is too high, backflow is likely to occur. However, the water level on the outside can generate pressure to squeeze the flap gate 55. The flap gate 55 will stick to the partition 51 under water pressure and seal the through hole 7. This can prevent the external water level from backflowing into the sewage well on the other side of the float valve. This installation has good adaptability to working conditions, low equipment cost, no need for manual operation, no need for external force control, and the built-in flap gate has good anti-backflow sealing performance.

[0029] The partition 51 has a through hole 7 fixedly opened inside, which is used for drainage of the partition 51. The outside of the through hole 7 is movably connected to the inner wall of the flap 55. A sealing layer 6 is fixedly sleeved on the rear side of the float valve housing 1. The sealing layer 6 is made of NBR nitrile rubber material. The sealing layer 6 is sleeved between the rear side of the float valve housing 1 and the sewage well installation hole, which can reduce the problems of water backflow and valve leakage.

[0030] Working principle:

[0031] The improved float valve is used in the intercepting well of the drainage system. It changes the opening of the outlet by relying on the buoyancy effect of the water level change in the well. No external force is required for control. Due to the buoyancy of the float, the valve plate opens and the flow area of ​​the outlet changes with the water level. When the water level is lower than the float level, the float intercepting device is in a fully closed intercepting state under its own weight.

[0032] The improved float valve's float-driven valve opening structure:

[0033] The rotating shaft 41 can rotate along the inside of the front baffle 2. The active rod 44 is designed to be relatively long and can connect the float 45 and the rotating shaft 41 on the outside. The float 45 can be made of aluminum alloy hollow cylinder. The hollow cavity 46 inside the float 45 can increase the buoyancy of the float. Since the float valve shell 1 is set in the sewage well, the rise in the water level in the well can use buoyancy to push the float 45 up and down. When the water level is low, the float 45 is not affected by buoyancy. The active rod 44 and the float 45 will stand vertically downward under the action of gravity. When the water level rises, it can continuously push the float 45 to rise. The rising float 45 drives the rotating shaft 41 to rotate. The rotation of the other side of the rotating shaft 41 can drive the driven rod 42 to rotate. The driven rod 42 pushes the valve plate 43 to open. After the valve plate 43 leaves the drain hole 3, the sewage in the well water can flow outward and be discharged.

[0034] Anti-backflow structure of float valve:

[0035] The partition 51 separates the drainage space of the valve plate 43 inside the front baffle 2 from the external drainage space. The fixing block 52 is made of stainless steel and is firmly nailed to the partition 51 by the anchor bolt 53. The flap gate 55 is designed as a circular metal plate slightly larger than the through hole 7. The flap gate 55 can be rotated along the movable pin 54. When the water level on the other side of the float valve housing 1 is too high, backflow is likely to occur. However, the water level on the outside can generate pressure to squeeze the flap gate 55. The flap gate 55 will stick to the partition 51 under water pressure and seal the through hole 7. This will prevent the external water level from backflowing into the sewage well on the other side of the float valve.

[0036] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An improved float valve, comprising a float valve housing (1), a front baffle (2), and a drain hole (3), wherein the front baffle (2) is fixedly installed at the front end of the float valve housing (1), and the drain hole (3) is fixedly opened in the middle of the front baffle (2), characterized in that: The front baffle (2) is provided with a float valve opening and closing structure (4) on the outside, and the float valve housing (1) is provided with a float valve anti-backflow flapping gate structure (5) on the inside.

2. The improved float valve according to claim 1, characterized in that: The float valve opening and closing structure (4) includes a rotating shaft (41) and a float (45). The rotating shaft (41) is rotatably connected to the inner side of the outer wall of the front baffle (2). An active rod (44) is fixedly connected to the front side wall of the rotating shaft (41). The float (45) is fixedly installed at the other end of the active rod (44). A hollow cavity (46) is fixedly opened inside the float (45). A driven rod (42) is fixedly connected to the rear side wall of the rotating shaft (41). A valve plate (43) is fixedly installed at the other end of the driven rod (42).

3. The improved float valve according to claim 2, characterized in that: The side wall of the valve plate (43) is movably connected to the inside of the drain hole (3), and the driving rod (44) is perpendicular to each other through the rotating shaft (41) and the driven rod (42).

4. The improved float valve according to claim 1, characterized in that: The anti-backflow flap gate structure (5) of the float valve includes a partition (51) and a flap gate (55). The partition (51) is fixedly installed on the inner side of the float valve housing (1). The outer wall of the partition (51) is provided with two fixing blocks (52). Anchor bolts (53) are fixedly connected to the inner side of the two fixing blocks (52). The two anchor bolts (53) are fixedly connected in the partition (51). Movable pins (54) are fixedly connected to the inner side of the two fixing blocks (52). The flap gate (55) is rotatably connected to the outer side of the movable pins (54).

5. The improved float valve according to claim 4, characterized in that: The partition (51) has a through hole (7) fixedly opened inside, and the outer side of the through hole (7) is movably connected to the inner wall of the flap (55).

6. The improved float valve according to claim 1, characterized in that: A sealing layer (6) is fixedly sleeved on the rear side of the float valve housing (1).

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