Sludge cleaning device for silt well

Abstract

The utility model discloses a silt cleaning device for a dredge well, which relates to the technical field of sewer cleaning and comprises a water seepage bag, a base used for sitting at the bottom of the dredge well is fixedly arranged in the middle of the bottom of the water seepage bag, and a hanging seat is arranged above the base. An elastic opening supporting ring is fixedly connected to a bag opening of the water seepage bag, and the elastic opening supporting ring is used for enabling the bag opening part of the water seepage bag to be attached to the well wall of the dredge well; at least three opening-supporting connecting seats which are evenly distributed in the circumferential direction are fixedly arranged at the bag opening of the water seepage bag, opening-supporting supporting rods are hinged between the opening-supporting connecting seats and the base, and opening-supporting connecting rods are hinged between the opening-supporting connecting seats and the hanging seat. The device is slightly influenced by a thin-end-up structure of the mud settling well and a well wall protruding structure, and is beneficial to reducing personnel descending into the well and reducing damage to sewage suction equipment.

Description

Technical Field

[0001] This utility model relates to the field of sewer cleaning technology, and in particular to a device for cleaning silt deposits in sedimentation wells. Background Technology

[0002] A sedimentation well is a manhole with a sedimentation trough at the bottom. Its purpose is to allow silt and other sediment in the drainage pipes to settle into the trough, reducing sediment accumulation and ensuring normal drainage. According to GB50014-2021 "Outdoor Drainage Design Standard," sedimentation troughs should be installed at certain intervals of manholes, as well as at one manhole before a pumping station and at each household connection manhole. To ensure effective sedimentation and ease of dredging, the depth of the sedimentation trough is typically 0.5–0.7 m, and the cleaning and treatment of the deposited silt should be considered. The conventional method for cleaning silt is direct extraction. During the operation, at least one person needs to go down into the well to assist in moving the suction pipe opening, and the silt is gradually extracted by the suction pump. However, the working environment for this sewage suction is quite harsh. In addition, the sediment in the sedimentation tank is not only composed of mud and sand, but also contains some heavy materials such as glass and metal. Therefore, there are significant safety risks in going down into the well. Furthermore, when extracting sediment, these heavy materials can easily damage the sewage suction pump, affecting the operation and increasing maintenance costs.

[0003] To address this, the applicant has employed a dredging device disclosed in utility model publication number "CN219671475U". This device utilizes multi-layered sedimentation chambers installed within a sedimentation trough to collect sediment in layers. During dredging, the sedimentation chambers are simply lifted out of the wellhead, minimizing personnel down into the well, improving operational safety, reducing the use of suction equipment, and minimizing operational disruptions and maintenance costs due to equipment damage. However, in practical use, it has been found that the sedimentation chamber needs a diameter similar to the sedimentation trough to achieve the desired sediment collection and dredging objectives. While the opening dimensions of various inspection wells are generally fixed, the diameter of the chamber is usually larger than the opening. For sedimentation wells, this means the diameter of the sedimentation trough is larger than the wellhead diameter, resulting in a structure that is narrower at the top and wider at the bottom. This makes it difficult to lower sedimentation chambers that match the sedimentation trough. Furthermore, many sedimentation wells have protruding structures such as climbing steel bars and drainage pipes on the well walls, further complicating the lowering of the sedimentation chamber and hindering its widespread adoption. Therefore, a new device is needed to avoid the influence of the fine upper and coarse lower structure of the sedimentation well and the influence of the protruding structure of the well wall. This invention was created for this purpose. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sediment cleaning device for sediment wells that is less affected by the structure of the sediment well being fine at the top and coarse at the bottom, less affected by the structure of the protruding well wall, and is conducive to reducing the number of personnel going down into the well and reducing damage to the suction equipment.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a silt removal device for sedimentation wells, including a seepage bag, a base for sitting against the bottom of the sedimentation well fixedly provided in the middle of the bottom of the seepage bag, and a hanging seat provided above the base; an elastic support ring is fixedly connected to the opening of the seepage bag, the elastic support ring is used to make the opening of the seepage bag fit against the well wall of the sedimentation well; at least three circumferentially distributed support connecting seats are fixedly provided at the opening of the seepage bag, a support support rod is hingedly connected between the support connecting seat and the base, and a support connecting rod is hingedly connected between the support connecting seat and the hanging seat.

[0006] As a preferred technical solution, a centering upright is fixedly provided in the middle of the base, and a centering sleeve for sleeved on the centering upright is fixedly provided on the hanging seat, with the centering sleeve and the centering upright being in clearance fit.

[0007] As a preferred technical solution, a centering guide cone is provided at the lower end of the centering sleeve.

[0008] As a preferred technical solution, the top of the centering upright is provided with a centering guide slope.

[0009] As a preferred technical solution, the permeable bag is a regular canvas bag or a UHMWPE woven bag.

[0010] As a preferred technical solution, the elastic support ring is a spring steel ring.

[0011] As a preferred technical solution, the support rod includes a first support rod hinged to the support connecting seat and a second support rod hinged to the base. The end face of the second support rod near the first support rod is provided with a support rod length adjustment screw hole, and the second support rod is provided with a support rod length adjustment screw connected to the support rod length adjustment screw hole.

[0012] As a preferred technical solution, the support connecting rod includes a first connecting rod hinged to the support connecting seat and a second connecting rod hinged to the hanging seat. The end face of the second connecting rod near the first connecting rod is provided with a connecting rod length adjustment screw hole, and the first connecting rod is provided with a connecting rod length adjustment screw connected to the connecting rod length adjustment screw hole.

[0013] Due to the adoption of the above technical solution, the sludge removal device for sedimentation wells includes a seepage bag. A base is fixedly mounted on the center of the bottom of the seepage bag for resting against the bottom of the sedimentation well. A hanging seat is provided above the base. An elastic support ring is fixedly connected to the opening of the seepage bag, which is used to keep the opening of the seepage bag against the well wall. At least three circumferentially distributed support connecting seats are fixedly mounted at the opening of the seepage bag. Supporting rods are hinged between the support connecting seats and the base, and supporting connecting rods are hinged between the support connecting seats and the hanging seat. Normally, the base rests against the bottom of the sedimentation well, and the opening of the seepage bag, under the action of the elastic support ring and the supporting rods, rests against the well wall at a certain height, and the entire bag is located within the sedimentation trough. During normal sewage flow through the sedimentation well, heavy materials such as silt, glass, and metal settle inside the seepage bag, while water can seep through the seepage bag into the space between the seepage bag and the sedimentation tank wall. Therefore, the main heavy materials and thick sludge remain inside the seepage bag. During cleaning, the well cover is opened, and a lifting machine is used to lift the lifting platform. The pulling action of the support connecting rod overcomes the elastic force of the elastic support ring, pulling the opening of the seepage bag closed. The support rod simultaneously closes until the support connecting rod and the support rod are roughly in a straight line. Then, the device is continuously lifted. Because the device is folded into a state with a diameter significantly smaller than the well opening diameter, it is less affected by the sedimentation well's top-thin, bottom-thick structure and the protruding structure of the well wall. This also facilitates re-lowering after the thick sludge is poured out. Even if there is residual sewage in the sedimentation tank after the thick sludge has been poured out, it is still a relatively thin body of water that can be directly extracted by lowering a suction pipe. This reduces the need for personnel to go down into the well and minimizes damage to the sewage suction equipment. Attached Figure Description

[0014] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0017] Figure 3 yes Figure 1 A top-down enlarged structural diagram of the central base;

[0018] Figure 4 yes Figure 1 A diagram showing the state of the lifting frame at the beginning of its lifting operation;

[0019] Figure 5 yes Figure 4A diagram showing the state when the support connecting rod and the support rod are roughly in a straight line after being hoisted.

[0020] Figure 6 yes Figure 5 Enlarged view of the BB structure in the image;

[0021] Figure 7 yes Figure 6 An enlarged structural diagram of one of the support joints;

[0022] Figure 8 yes Figure 5 A diagram showing the state of continuous suspension.

[0023] In the diagram: 1-Water-permeable bag; 2-Base; 21-Seat ring; 22-Fixing bolt; 23-Centering upright; 24-Centering guide ramp; 3-Hanging seat; 31-Hanging ring; 32-Centering sleeve; 33-Centering guide cone; 4-Elastic support ring; 5-Support connecting seat; 6-Support support rod; 61-First support rod; 62-Second support rod; 63-Support rod length adjustment screw; 7-Support connecting rod; 71-First connecting rod; 72-Second connecting rod; 73-Connecting rod length adjustment screw hole; 9-Sedimentation well; 91-Sedimentation trough; 92-Drainage pipe; 93-Climbing steel bar; 94-Manhole cover. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0025] refer to Figures 1 to 8 The silt removal device for sedimentation wells includes a seepage bag. The seepage bag is a soft structure in this embodiment that collects silt and other substances, and is also a container for removing silt and other substances. It is preferably made of a material that has water permeability, high strength, and good tear resistance, such as a regular canvas bag or a UHMWPE woven bag.

[0026] The bottom of the seepage bag is fixedly equipped with a base for resting against the bottom of the sedimentation well; preferably, this fixing is achieved using bolts. (Reference) Figure 2 and Figure 3 In this embodiment, the base includes a seat ring, and several circumferentially distributed fixing bolts are installed between the seat ring and the bottom of the seepage bag. In actual connection, it is preferable to add a gasket on the fixing bolt at the outside of the seepage bag to increase the connection between the bag body and the base and to help reduce sludge leakage.

[0027] Preferably, the diameter of the base is smaller than the diameter of the wellhead of the sedimentation well. Considering that the wellhead diameter is mostly around 700mm, and taking into account the protruding structures such as the climbing steel bars on the well wall and the drainage pipe head, the diameter of the base is preferably between 400 and 450mm.

[0028] refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 The base is provided with a lifting seat above it. The lifting seat is the structure used for lifting and connection in this embodiment, and a lifting ring is preferably fixed on it.

[0029] refer to Figure 2 , Figure 6 and Figure 7 An elastic support ring is fixedly connected to the opening of the seepage bag. The elastic support ring is used to keep the opening of the seepage bag against the well wall of the sedimentation well. That is, in the free state, the elastic support ring keeps the opening of the seepage bag in an open state, so that the opening is against the well wall of the sedimentation well, which helps to ensure the seepage bag's ability to collect silt, sand and high-density materials such as glass and metal.

[0030] refer to Figure 2 and Figure 6 At least three circumferentially distributed support connectors are fixed at the opening of the seepage bag. The fixing method here is the same as that of the base, and will not be described again here; and in this embodiment, four support connectors are shown. A support rod is hinged between the support connector and the base, and a support connecting rod is hinged between the support connector and the hanging seat.

[0031] refer to Figure 1 In this embodiment, the bag is normally placed inside the sedimentation trough of the sedimentation well, with the base resting against the bottom of the well, forming a basic support structure. The elastic support ring opens the opening of the seepage bag, allowing the bag opening to naturally rest against the well wall, or more precisely, near the opening of the sedimentation trough. Since the diameter of the base is smaller than the diameter of the well opening, and therefore also smaller than the diameter of the sedimentation trough opening, the support rod extends outwards with the opening action of the elastic support ring, ultimately forming a diagonal support rod between the seepage bag opening and the base. This ensures that the seepage bag opening rests against the well wall at a specified height, i.e., near the opening of the sedimentation trough.

[0032] At this time, the support connecting rod is also in an open state. Based on the circumferentially evenly distributed arrangement of the support connecting rod, the lifting seat is basically directly above the base. To facilitate subsequent lifting and ensure that the opening of the seepage bag is close to the well wall, the length of the support connecting rod should be such that after the opening of the seepage bag is close to the well wall, the lifting seat is at a height higher than the opening of the seepage bag. That is, at this time, the support connecting rod is in an inclined state where the connecting end of the support connecting seat is lower than the connecting end of the lifting seat. In this state, the gravitational component of the components such as the lifting seat and the support connecting rod also acts on the opening of the seepage bag, making it reliably close.

[0033] Preferably, refer to Figure 2 A centering rod is fixedly installed in the middle of the base, and a centering sleeve is fixedly installed on the hanging seat for fitting onto the centering rod. The centering sleeve and the centering rod are in clearance fit. During the process of placing the bag into the sedimentation tank in this embodiment, the centering sleeve, fitted onto the centering rod, achieves centering, ensuring that the opening of the seepage bag fits smoothly against the wall. Furthermore, even with a large flow of water in the sewer pipe during subsequent use, this centering function ensures that the hanging seat is not easily tilted due to water flow impact, ensuring that the opening of the seepage bag remains against the well wall, thus facilitating the collection of silt and heavy materials.

[0034] Preferably, refer to Figure 2 The lower end of the centering sleeve is provided with a centering guide cone to ensure that the centering sleeve can be smoothly fitted onto the centering upright during the placement process into the sedimentation tank in this embodiment. Similarly, the top end of the centering upright is provided with a centering guide ramp. (Reference) Figure 3 The base described in this embodiment includes a seat ring, and at least three circumferentially distributed upright connecting rods are welded and fixed between the seat ring and the bottom of the centering upright, thus forming a fixed arrangement of the centering upright on the base.

[0035] During the above-mentioned use, the sewage flowing to the sedimentation well will have its internal silt and heavy substances settle into the seepage bag, and some water will seep into the space between the seepage bag and the sedimentation tank. Heavy substances and thick sludge will remain in the seepage bag.

[0036] refer to Figure 4 , Figure 5 and Figure 6After a certain period of use, the manhole cover is opened, and the lifting platform is lifted using hoisting machinery. Based on the weight of the base of the seepage bag and the weight of the silt collected inside, the lifting platform first uses the support connecting rod to pull the opening of the seepage bag. This pulling action easily overcomes the spring force of the elastic support ring, and the opening of the seepage bag begins to close. The support connecting rod closes simultaneously until the support connecting rod and the support rod are roughly in a straight line. (Reference) Figure 8 At this point, the entire embodiment is folded up to a diameter smaller than the wellhead diameter, and can be continuously hoisted out of the wellhead.

[0037] After being hoisted out, the thick sludge inside the seepage bag is poured out. At this point, even if there is sewage in the sedimentation tank, it is relatively thin and does not contain the aforementioned high-density substances, so the suction pipe can be directly lowered for extraction.

[0038] After extraction, this embodiment is lowered back down. Based on the weight of the seepage bag and the bottom base, the support rod and the support support rod remain roughly straight. However, because the weight of the internal silt is reduced, the support rod and support support rod will open slightly more under the action of the elastic support ring compared to when lifted, but the diameter of this embodiment remains smaller than the well opening diameter. After being lowered to the base and resting against the bottom of the well, the gravity of the seepage bag and the base disappears. Under the elastic force of the elastic support ring and the gravity of the lifting seat, the seepage bag opening will reopen during the continued lowering of the lifting seat, eventually returning to its state of being against the well wall as before lifting. Simultaneously, the centering sleeve can be re-attached to the centering upright for centering, and this embodiment is ready for use again.

[0039] refer to Figure 6 and Figure 7 Based on the fact that the elastic support ring described above will be forced to deform during the lifting process, and that it can still open the opening of the seepage bag during the final stage of lowering after deformation, the elastic support ring is preferably made of a material with high yield strength and elastic limit and good durability, such as a spring steel ring. Of course, the surface of the elastic support ring should be treated for corrosion and rust prevention.

[0040] In practical use, the amount of silt inside the seepage bag may vary. If the cleaning frequency is high, there will be relatively little silt inside the seepage bag, which can be lifted out directly. However, if the cleaning frequency is low, the seepage bag may be full. In this case, when lifting, the closing of the bag opening will reduce its volume, causing silt to overflow from the bag opening. However, since heavier materials such as sand, glass, and metal tend to accumulate at the bottom of the seepage bag, the overflowing material is mainly a thick mud slurry. This mud mixes with the thin water outside the seepage bag and does not affect the subsequent direct extraction by the suction pipe. Therefore, the purpose of extracting the heavier materials and thick silt separately can still be achieved. When the cleaning frequency is lower, the silt in the sedimentation tank will rise above the opening of the seepage bag. Over time, the silt at the opening of the sedimentation tank will solidify to a certain extent. This solidified layer is located at and above the opening of the seepage bag. Since the lifting in this embodiment first involves lifting the support connecting rod and closing the seepage bag, and this closing process is carried out from multiple points of local closing from the positions of several support rods, it is easy to break the solidified layer and cause the seepage bag to detach from the solidified part outside the bag, so that the lifting in this embodiment is smooth and the purpose of sludge removal is achieved.

[0041] In summary, in this embodiment, the opening of the seepage bag can be opened to fit against the well wall during use, ensuring the collection capacity of silt and heavy materials. It can be folded into a smaller diameter state during lifting and lowering, thus minimizing the impact of the sedimentation well's top-thin, bottom-coarse structure and protruding well wall structures. Thick silt and its heavy materials are collected and poured out by the seepage bag. Even if there is residual sewage in the sedimentation tank, it is relatively thin and lacks heavy materials, allowing for direct extraction via a lowered suction pipe. This reduces the need for personnel to enter the well and minimizes damage to the suction equipment.

[0042] Furthermore, preferably, refer to Figure 2The support rod includes a first support rod hinged to the support connecting seat and a second support rod hinged to the base. The second support rod has an adjustable threaded hole on its end face near the first support rod, and an adjustable threaded screw connected to the adjustable threaded hole is also provided on the second support rod. In other words, the support rod is designed with an adjustable length. Therefore, when there are differences in the depth of the sedimentation tank, the support height can be adjusted by changing the length of the support rod for adaptability. When there are differences in the size of the sedimentation tank opening, only the seepage bag and the elastic support ring at the bag opening need to be manufactured separately, and then the length of the support rod can be adjusted accordingly so that the opening of the seepage bag can still be close to the opening of the sedimentation tank. This is beneficial for accommodating the size differences of various sedimentation tanks, and with a common frame, only different seepage bags and elastic support rings need to be replaced to achieve the application purpose, simplifying the mass production process and reducing mass production costs.

[0043] Similarly, the support connecting rod includes a first connecting rod hinged to the support connecting seat and a second connecting rod hinged to the hanging seat. The end face of the second connecting rod near the first connecting rod is provided with a connecting rod length adjustment screw hole, and the first connecting rod is provided with a connecting rod length adjustment screw connected to the connecting rod length adjustment screw hole.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for cleaning silt deposits in sedimentation wells, characterized in that: The device includes a seepage bag, with a base fixedly mounted at the center of the bottom for resting against the bottom of a sedimentation well, and a hanging seat above the base. An elastic support ring is fixedly connected to the opening of the seepage bag, which is used to make the opening of the seepage bag rest against the well wall of the sedimentation well. At least three circumferentially distributed support connecting seats are fixedly mounted at the opening of the seepage bag, and a support support rod is hinged between the support connecting seat and the base. A support connecting rod is hinged between the support connecting seat and the hanging seat.

2. The silt removal device for sedimentation wells as described in claim 1, characterized in that: A centering rod is fixedly provided in the middle of the base, and a centering sleeve is fixedly provided on the hanging seat for sleeved on the centering rod. The centering sleeve and the centering rod are in clearance fit.

3. The silt removal device for sedimentation wells as described in claim 2, characterized in that: The lower end of the centering sleeve is provided with a centering guide cone.

4. The silt removal device for sedimentation wells as described in claim 2, characterized in that: The top of the centering upright is provided with a centering guide slope.

5. The silt removal device for sedimentation wells as described in claim 1, characterized in that: The permeable bag is a regular canvas bag or a UHMWPE woven bag.

6. The silt removal device for sedimentation wells as described in claim 1, characterized in that: The elastic support ring is a spring steel ring.

7. The silt removal device for sedimentation wells as described in any one of claims 1 to 6, characterized in that: The support rod includes a first support rod hinged to the support connecting seat and a second support rod hinged to the base. The end face of the second support rod near the first support rod is provided with a support rod length adjustment screw hole, and the second support rod is provided with a support rod length adjustment screw connected to the support rod length adjustment screw hole.

8. The silt removal device for sedimentation wells as described in any one of claims 1 to 6, characterized in that: The support connecting rod includes a first connecting rod hinged to the support connecting seat and a second connecting rod hinged to the hanging seat. The end face of the second connecting rod near the first connecting rod is provided with a connecting rod length adjustment screw hole, and the first connecting rod is provided with a connecting rod length adjustment screw connected to the connecting rod length adjustment screw hole.

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