Liftable filtering device mounted at water inlet of sedimentation tank

Abstract

The utility model discloses a liftable filtering device mounted at a water inlet of a sedimentation tank, which is formed by assembling a hollow floating ball, a spherical filtering cover, an expansion joint with a reset tension spring, an elbow, a horizontal spigot and socket pipe and the like according to a specific process, and inserting the horizontal spigot and socket pipe into a culvert pipe for sewage to flow into the sedimentation tank in a sewage ditch. When silt in a sewage ditch continuously precipitates and the height of the silt continuously rises, the hollow floating ball in the lifted water level lifting device jacks the spherical filter cover to pull the telescopic joint with the reset tension spring to stretch upwards, so that the spherical filter cover serving as a sewage inlet is always above the silt no matter what height the silt rises. When the water level of the sewage ditch is flush with the embankment face, the sewage ditch is dredged, after dredging is completed, the water level drops, the floating ball moves downwards, the telescopic joint with the reset tension spring recovers to the original height under the tension effect of the tension spring, and the device enters the next filtering circulation again.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a filtering device which is installed at a water inlet of a sedimentation tank and can be raised and lowered to prevent being buried by mud and sand. Background Art

[0002] In the sewage treatment project of tunnel construction, tertiary sedimentation is a frequently used and effective process. The sewage ditch is injected into the sewage sedimentation tank through the culvert. In order to prevent branches, waste plastic bags, wood blocks and other debris from flowing into the sewage sedimentation tank, an iron fence is generally installed at the water inlet of the culvert to filter out various debris. Because the sewage generated by tunnel construction has a particularly high content of mud and sand, it usually takes only 3-4 days for the mud and sand settled in the sewage ditch to bury the water inlet of the culvert. After the mud and sand are removed, the siltation state returns to the state after a few days. Therefore, silt removal is required every day, which is very annoying. A filter device that can be raised and lowered and installed at the water inlet of the sedimentation tank can solve this problem well. Summary of the invention

[0003] The technical scheme adopted by the utility model is: a filter device which can be raised and lowered and installed at the water inlet of a sedimentation tank, comprising an external porous spherical filter cover which is installed vertically on the water surface, and a hollow floating ball which can swim in the filter cover, in addition, there are an expansion joint with a reset spring connected to the spherical filter cover, an elbow connected to the expansion joint, and a horizontal conduit which has one end connected to the elbow and the other end socketed in the culvert.

[0004] A horizontal conduit of a filter device installed at the water inlet of a sedimentation tank and capable of being raised and lowered is inserted into the water inlet culvert of the sedimentation tank. Sewage in a sewage ditch flows into the spherical filter cover from the many small holes of the spherical filter cover, passes through the gap between the filter cover and the float, and flows into the sedimentation tank through the expansion joint with a reset tension spring, the elbow, the horizontal conduit, and the culvert. In this process, a large amount of slag is blocked outside the filter cover. As the silt in the sewage pool ditch cannot settle, the sludge in the ditch continues to rise, successively burying the horizontal conduit, elbow, and the lower part of the expansion joint with reset spring. At the same time, the sewage water level also rises with the sludge height. The buoyancy of the float in the spherical filter cover acts on the top of the filter cover to overcome the resistance of the tension spring and the expansion joint. As the sewage water level continues to rise, the expansion joint with reset spring is pulled upward. Although the sludge height in the sewage ditch is increasing, the spherical filter cover as the sewage inlet overcomes the resistance of the tension spring and the expansion joint under the upward buoyancy of the hollow float and is always above the sludge in the sewage ditch. It will not be buried from beginning to end. When the sludge rises to a certain height and the water level of the sewage ditch is level with the embankment, it is time to dredge the sewage ditch. After dredging, the water level drops, the float moves down, and the expansion joint with reset spring returns to its original state under the tension of the tension spring.

[0005] The utility model is characterized in that the sewage ditch flows to the sedimentation tank in a horizontal direction, and the device uses an elbow to change it into a vertical downward flow so that the direction of the sewage ditch and the direction of the force of the floating ball are in a straight line.

[0006] The utility model is also characterized in that the original iron fence filtering form is changed into a spherical filtering cover, thereby increasing the filtering area, and at the same time a hollow floating ball is arranged in the cover to provide upward extension power for the telescopic joint with a reset tension spring.

[0007] The utility model is also characterized in that the device uses a telescopic joint with a reset tension spring, which can compensate for the height of the spherical filter cover extending upward under the action of buoyancy.

[0008] The utility model is also characterized in that a tension spring is designed on the expansion joint in the device, so that when the water level of the device drops, the expansion joint can move downward depending on the tension of the tension spring.

[0009] The utility model is also characterized in that the horizontal conduit designed for the device makes it extremely easy to connect the device with the culvert.

[0010] The beneficial effects of the utility model are: 1. the water inlet of the sedimentation tank water inlet culvert is raised as the silt height increases, and will not be buried by the silt; 2. frequent desilting of the sewage ditch is avoided, and labor costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic diagram of an example structure of a filtering device which is installed at a water inlet of a sedimentation tank and can be raised and lowered.

[0012] Including: 1. Hollow float, 2. Spherical filter cover, 3. Telescopic joint with reset spring,

[0013] 4. Elbow, 5. Horizontal socket pipe DETAILED DESCRIPTION

[0014] The utility model is described in detail below with reference to the accompanying drawings and specific implementation schemes.

[0015] A hollow floating ball (1) of suitable volume is placed in a spherical filter cover (2) with many φ5 small holes, and the spherical filter cover (2) is firmly and effectively connected to the thin end of the telescopic joint (3) with a reset tension spring, and the combination of the three is docked and fixed with the vertical interface of the elbow (4), and the horizontal interface of the elbow (4) is firmly docked with the horizontal spigot (5). After the above installation is completed, the horizontal spigot is inserted into the water inlet culvert of the sewage ditch to the sedimentation tank, and a filter device installed at the water inlet of the sedimentation tank is assembled. When the sludge in the sewage ditch is shallow, the telescopic joint is at the original height. When the device is working, the sewage passes through the many small holes on the spherical filter cover (2), flows through the telescopic joint (3) with a reset tension spring, the elbow (4), and the horizontal spigot (5) into the horizontal culvert and flows into the sedimentation tank. Waste bags, branches, wood blocks and other debris are intercepted outside the cover by the spherical filter cover (2).

[0016] As the silt in the sewage ditch continues to settle, the height of the sludge also continues to increase, and the water level of the sewage ditch also continues to rise with the increase of sludge. Under the action of water buoyancy, the hollow floating ball (1) in the device pushes the top of the spherical filter cover (2) and pulls the telescopic joint (3) with a reset spring to continuously extend upward. Although the sludge height in the sewage ditch is rising, the spherical filter cover (2) as the sewage inlet is always above the sludge in the sewage ditch under the upward buoyancy of the hollow floating ball. When the sludge rises to a certain height and the water level of the sewage ditch is level with the embankment surface, it is time to dredge the sewage ditch. After dredging, the water level drops, the floating ball moves down, and the telescopic joint (3) with a reset spring returns to its original height under the tension of the spring, and the device enters the next filtering cycle.

Claims

1. A filter device installed at the water inlet of a sedimentation tank and capable of being raised and lowered, characterized in that The invention comprises a hollow floating ball (1), a spherical filter cover (2), an expansion joint (3) with a reset tension spring, an elbow (4), and a horizontal spigot (5). The above components form a set of filtering devices connected to the culvert of the water inlet of the sedimentation tank, which can be raised as the height of the sludge in the sewage ditch rises and is not buried by the sludge. The hollow floating ball (1) is arranged in the spherical filter cover (2). The spherical filter cover (2) is firmly connected to the thin end of the expansion joint (3) with a reset tension spring. The lower end of the expansion joint (3) with a reset tension spring is connected and fixed to the vertical interface of the elbow (4). The horizontal interface of the elbow (4) is firmly connected to the horizontal spigot (5).

2. A filter device installed at the water inlet of a sedimentation tank and capable of being raised and lowered according to claim 1, characterized in that: The pool-proximal end of the horizontal bell-and-spigot pipe (5) is butt-jointed with the inlet of the water inlet tube of the sewage sedimentation tank.

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