Scum fishing device for secondary sedimentation tank

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a secondary sedimentation tank scum salvaging device which comprises a supporting frame used for salvaging scum on the surface of sewage in a circular secondary sedimentation tank, the supporting frame is installed above the secondary sedimentation tank, a rotating motor reciprocating in the length direction of the supporting frame is installed below the supporting frame, and the rotating motor is connected with the supporting frame. The output end of the rotating motor is connected with one end of an electric telescopic rod, the other end of the electric telescopic rod is provided with a fishing barrel, the fishing barrel is of a circular barrel-shaped structure made of a metal filter screen, and a fishing opening is formed in a barrel body of the fishing barrel. Compared with a traditional method, according to the technical scheme, scum salvage operation is conducted in the secondary sedimentation tank, the salvage barrel is controlled to descend to the surface of wastewater in the secondary sedimentation tank and then driven to rotate, scum on the surface of the wastewater enters the salvage barrel through the salvage opening in the surface of the salvage barrel, and the wastewater flows out through the metal filter screen; the scheme has the advantages of large one-time salvage amount, convenience in operation and low water content in the scum.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a scum打捞 device for a secondary sedimentation tank. Background Art

[0002] The sedimentation tank is an important part of the sewage treatment system, which can remove suspended solids in the sewage and achieve the separation of mud and water. It can be divided into primary sedimentation tank, aerated grit chamber, secondary sedimentation tank, high-efficiency sedimentation tank, etc. according to its use. Among them, the secondary sedimentation tank is located behind the biochemical tank and is an important part of the activated sludge system.

[0003] The patent document with the patent publication number of CN216963852U discloses a scum打捞 device for a secondary sedimentation tank, which includes a scum filter hopper, a scum filter screen, a suspension rope, a lifting hook, a lifting rope and a crane; this device can effectively achieve the separation of water and solids and reduce the water content in the scum; it can be placed in the sludge sump to receive the slag discharged from the secondary sedimentation tank, or it can also salvage the scum accumulated in the sludge sump; the scum filter screen can be disassembled for cleaning or replacement; it has the advantages of large one-time salvage volume, simple structure, economic and practical, convenient operation, and less water content in the scum.

[0004] The above solution is for collecting and salvaging the scum after it enters the sludge sump. However, when the amount of scum is large, without a pre-salvage process, due to the limitations of the depth and diameter of the sludge sump itself, it is not conducive to the amount of scum salvaged, and the labor intensity is also relatively large. Content of the Utility Model

[0005] In order to overcome the above technical problems, the purpose of the utility model is to provide a scum打捞 device for a secondary sedimentation tank, which solves the problems of large labor intensity and lack of special equipment for salvaging the scum on the surface of the current secondary sedimentation tank.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A scum打捞 device for a secondary sedimentation tank is used to salvage the scum on the surface of the sewage inside a circular secondary sedimentation tank, including a support frame, the support frame is installed above the secondary sedimentation tank, a rotating motor that reciprocates along its length direction is installed below the support frame, one end of an electric telescopic rod is connected to the output end of the rotating motor, the other end of the electric telescopic rod is provided with a打捞筒, the打捞筒 is a circular cylindrical structure made of a metal filter screen, and a打捞口 is opened on the barrel body of the打捞筒.

[0008] Furthermore, the support frame is in a "C" shape structure. The middle of the support frame is a horizontal part, and the two ends of the support frame are vertical parts. The length of the horizontal part of the support frame matches the diameter length of the secondary sedimentation tank, and the vertical parts of the support frame extend downward and are fixedly connected to the side wall of the secondary sedimentation tank.

[0009] Furthermore, a propulsion motor is provided at one end of the horizontal part of the support frame, a screw rod is provided for internal rotation of the horizontal part of the support frame, the output end of the propulsion motor is fixedly connected to the end of the screw rod, a moving seat threadably connected to the screw rod is provided inside the support frame, and the moving seat is connected to the rotating motor.

[0010] Furthermore, a cleaning port is provided on the vertical portion of the support frame, and a fixed top cylinder is provided at the bottom of the cleaning port.

[0011] Furthermore, the fixed top cylinder is a cylindrical structure with a rubber layer covering the top.

[0012] Furthermore, the electric telescopic rod and the overshot tube are rotationally connected, and an electric push rod is arranged between the two, and two ends of the electric push rod are rotationally connected to the electric telescopic rod and the overshot tube respectively.

[0013] Furthermore, the electric push rod, the electric telescopic rod and the overshot tube form a triangle structure.

[0014] Furthermore, at least one end of the overshot tube is provided with an opening communicating with the inner cavity thereof, and the opening is connected to a cover plate via a torsion spring.

[0015] Furthermore, when the length of the overshot is less than the radius of the secondary sedimentation tank, the position of the rotational connection between the electric telescopic rod and the overshot is located at the end of the overshot.

[0016] Furthermore, when the length of the overshot is greater than the radius of the secondary sedimentation tank but less than the diameter of the secondary sedimentation tank, the position of the rotational connection between the electric telescopic rod and the overshot is located in the middle of the overshot.

[0017] Beneficial effects of the utility model:

[0018] Compared with the traditional method, the technical scheme performs the salvage operation of scum in the secondary sedimentation tank. By controlling the salvage tube to descend to the surface of the wastewater in the secondary sedimentation tank, and then driving the salvage tube to rotate, the scum on the surface of the wastewater will enter the inside of the salvage tube through the salvage port on the surface of the salvage tube, and the wastewater will flow out through the metal filter. Because the salvage tube always rotates in one direction, the inertia will prevent the scum entering the salvage tube from actively flowing out. After a period of time, the salvage tube can be raised to actively clean the scum collected inside. The scheme has the advantages of large salvage volume at one time, simple structure, economy and practicality, convenient operation and low water content in the scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] Figure 1This is a schematic diagram of the use state of the utility model installed on the secondary sedimentation tank;

[0021] Figure 2 It is a cross-sectional view of the utility model installed on the secondary sedimentation tank;

[0022] Figure 3 It is a three-dimensional view of the electric telescopic rod, the overshot tube and the electric push rod in the utility model;

[0023] Figure 4 It is a side view of the overshot in the utility model;

[0024] Figure 5 The stereoscopic view of the overshot tube in the second embodiment Figure 1 ;

[0025] Figure 6 The stereoscopic view of the overshot tube in the second embodiment Figure 2 .

[0026] In the figure: 1. Second sedimentation tank; 2. Support frame; 21. Cleaning port; 22. Fixed top cylinder; 3. Propulsion motor; 31. Screw rod; 32. Moving seat; 4. Rotating motor; 5. Electric telescopic rod; 6. Salvage tube; 61. Salvage port; 7. Electric push rod. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1:

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a secondary sedimentation tank scum salvaging device is used to salvage scum on the surface of sewage inside a circular secondary sedimentation tank 1, including a support frame 2, the support frame 2 is installed above the secondary sedimentation tank 1, a rotating motor 4 is installed below the support frame 2 and moves back and forth along its length direction, the output end of the rotating motor 4 is connected to one end of an electric telescopic rod 5, and a salvage tube 6 is provided at the other end of the electric telescopic rod 5. The salvage tube 6 is a circular cylindrical structure made of a metal filter, and a salvage port 61 is provided on the barrel of the salvage tube 6.

[0030] When salvaging scum, first control the rotation motor 4, the electric telescopic rod 5, and the salvage cylinder 6 to move to the middle position of the secondary sedimentation tank 1. Since the secondary sedimentation tank 1 is circular, when the length of the salvage cylinder 6 is less than the radius length of the secondary sedimentation tank 1, the rotation connection position between the electric telescopic rod 5 and the salvage cylinder 6 is located at the end of the salvage cylinder 6, and this position also corresponds to the center of the secondary sedimentation tank 1. After the position is determined, the salvage cylinder 6 can be lowered to the surface of the wastewater in the secondary sedimentation tank 1 through the electric telescopic rod 5 until the surface height of the wastewater is lower than the horizontal height of the salvage port 61. Then, the rotation motor 4 can be used to drive the electric telescopic rod 5 and the salvage cylinder 6 to rotate. At this time, the scum on the wastewater surface will enter the interior of the salvage cylinder 6 through the salvage port 61, and the wastewater will flow out through the metal filter screen. And because the salvage cylinder 6 always rotates in one direction, due to inertia, the scum entering the salvage cylinder 6 will not flow out actively. After a period of salvage, the salvage cylinder 6 can be lifted through the electric telescopic rod 5, and the salvage cylinder 6 can be controlled to move to the edge of the secondary sedimentation tank 1. At this time, the scum collected inside the salvage cylinder 6 can be actively cleaned. This solution has the advantages of a large amount of salvage at one time, simple structure, economic practicality, convenient operation, and less water content in the scum.

[0031] As Figure 2 shown, the support frame 2 is in a "C" - shaped structure. The middle part of the support frame 2 is the horizontal part, and the two ends of the support frame 2 are the vertical parts. The length of the horizontal part of the support frame 2 matches the diameter length of the secondary sedimentation tank 1. The vertical parts of the support frame 2 extend downward and are fixedly connected to the side wall of the secondary sedimentation tank 1. The connection method can be selected to be fixed by bolt screwing.

[0032] As Figure 1 、 Figure 2 shown, a propulsion motor 3 is arranged at one end of the horizontal part of the support frame 2. A lead screw 31 is rotatably arranged inside the horizontal part of the support frame 2. The output end of the propulsion motor 3 is fixedly connected to the end of the lead screw 31. A moving seat 32 thread - connected to the lead screw 31 is slidably arranged inside the support frame 2. The moving seat 32 is connected to the rotation motor 4. The rotation motor 4 is located below the moving seat 32. When controlling the movement of the electric telescopic rod 5 and the salvage cylinder 6, start the propulsion motor 3, and the lead screw 31 rotates accordingly. The moving seat 32 moves axially with respect to the lead screw 31 under the action of the thread connection, and the movement accuracy is high. The center position of the secondary sedimentation tank 1 can be obtained by pre - measuring the diameter of the secondary sedimentation tank 1, so as to realize the electric telescopic rod 5 and the salvage cylinder 6 reaching the specified position.

[0033] As Figure 3As shown, the electric telescopic rod 5 is rotatably connected to the overshot tube 6, and an electric push rod 7 is also arranged therebetween. The electric push rod 7, the electric telescopic rod 5 and the overshot tube 6 form a triangular structure, and the two ends of the electric push rod 7 are rotatably connected to the electric telescopic rod 5 and the overshot tube 6 respectively; the overshot tube 6 can be controlled to rotate about the rotation connection of the electric telescopic rod 5 by extending and retracting the output end of the electric push rod 7. When scum is collected by the mobile phone, the entire overshot tube 6 can be tilted by the electric push rod 7, so that the scum inside the overshot tube 6 will gather at the lower end of the overshot tube 6, which is convenient for manual collection and processing.

[0034] like Figure 1 , Figure 2 As shown, a cleaning port 21 is provided at the vertical portion of the support frame 2, and a fixed top cylinder 22 is provided at the bottom of the cleaning port 21. The fixed top cylinder 22 is a cylindrical structure with a rubber layer covering the top; Figure 3 As shown, at least one end of the overshot tube 6 is provided with an opening connected to its inner cavity, and the opening is far away from the rotation connection between the overshot tube 6 and the electric telescopic rod 5, and the opening is connected to a cover plate through a torsion spring; when the scum inside the overshot tube 6 is cleaned, the overall inclination of the overshot tube 6 is controlled by the electric push rod 7, and the end of the overshot tube 6 with the opening will hit the fixed top tube 22, and the scum inside the overshot tube 6 will gather towards the cover plate. Under the force of the impact and the weight of the accumulated scum, the cover plate automatically flips open, and the scum inside the overshot tube 6 will be poured out through the opening here, thereby greatly saving the physical labor of manually collecting and cleaning the scum, and effectively improving the efficiency.

[0035] Embodiment 2:

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a secondary sedimentation tank scum salvage device is used to salvage scum on the surface of sewage inside a circular secondary sedimentation tank 1, including a support frame 2, the support frame 2 is installed above the secondary sedimentation tank 1, and a rotating motor 4 is installed below the support frame 2 to reciprocate along its length direction. The output end of the rotating motor 4 is connected to one end of an electric telescopic rod 5, and the other end of the electric telescopic rod 5 is provided with a salvage tube 6. The salvage tube 6 is a circular cylindrical structure made of a metal filter. The barrel of the salvage tube 6 is provided with a salvage port 61. Compared with the first embodiment:

[0037] like Figure 5 , Figure 6As shown, in the present embodiment, when the length of the overshot tube 6 is greater than the radius of the secondary sedimentation tank 1 but less than the diameter of the secondary sedimentation tank 1, the position of the rotational connection between the electric telescopic rod 5 and the overshot tube 6 is located in the middle of the overshot tube 6, which also corresponds to the center of the circle of the secondary sedimentation tank 1. At this time, both ends of the overshot tube 6 are provided with a salvage opening 61, and the positions of the two salvage openings 61 are in opposite directions. Therefore, when the overshot tube 6 rotates to collect scum, the two salvage openings 61 with different directions can collect the scum, and the salvage efficiency is further improved.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above contents are merely examples and explanations of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A secondary sedimentation tank scum salvaging device, used for salvaging scum on the surface of sewage inside a circular secondary sedimentation tank, characterized in that: It includes a support frame which is installed above the secondary sedimentation tank. A rotating motor that reciprocates along its length is installed below the support frame. One end of an electric telescopic rod is connected to the output end of the rotating motor, and a salvage cylinder is arranged at the other end of the electric telescopic rod. The salvage cylinder is a circular cylindrical structure made of a metal filter screen, and a salvage opening is formed in the barrel body of the salvage cylinder.

2. A secondary sedimentation tank scum salvage device according to claim 1, characterized in that: The support frame is in a "C" shape structure. The middle of the support frame is a horizontal part, and the two ends of the support frame are vertical parts. The length of the horizontal part of the support frame matches the diameter length of the secondary sedimentation tank, and the vertical parts of the support frame extend downward and are fixedly connected to the side wall of the secondary sedimentation tank.

3. A secondary sedimentation tank scum salvage device according to claim 2, characterized in that: A propulsion motor is arranged at one end of the horizontal part of the support frame. A lead screw is rotatably arranged inside the horizontal part of the support frame. The output end of the propulsion motor is fixedly connected to the end of the lead screw. A moving seat that is threadedly connected to the lead screw is slidably arranged inside the support frame, and the moving seat is connected to the rotating motor.

4. A secondary sedimentation tank scum salvage device according to claim 3, characterized in that: A cleaning opening is formed in the vertical part of the support frame, and a fixed top cylinder is arranged at the bottom of the cleaning opening.

5. A secondary sedimentation tank scum salvaging device according to claim 4, characterized in that: The fixed top cylinder is a cylindrical structure with a rubber layer covering the top.

6. The secondary sedimentation tank scum salvage device according to claim 1, characterized in that: The electric telescopic rod is rotatably connected to the salvage cylinder, and an electric push rod is also arranged between them. The two ends of the electric push rod are respectively rotatably connected to the electric telescopic rod and the salvage cylinder.

7. A secondary sedimentation tank scum salvaging device according to claim 6, characterized in that: The electric push rod, the electric telescopic rod and the salvage cylinder form a triangular structure.

8. The secondary sedimentation tank scum salvage device according to claim 1, characterized in that: At least one end of the salvage cylinder is provided with an opening communicating with its inner cavity, and a cover plate is connected to the opening through a torsion spring.

9. A secondary sedimentation tank scum salvaging device according to claim 6, characterized in that: When the length of the salvage cylinder is less than the radius length of the secondary sedimentation tank, the position of the rotational connection between the electric telescopic rod and the salvage cylinder is located at the end of the salvage cylinder.

10. A secondary sedimentation tank scum salvaging device according to claim 6, characterized in that: When the length of the salvage cylinder is greater than the radius length of the secondary sedimentation tank but less than the diameter length of the secondary sedimentation tank, the position of the rotational connection between the electric telescopic rod and the salvage cylinder is located in the middle of the salvage cylinder.

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