A manhole desilting device and method

Abstract

The present invention relates to a manhole dredging device and method, which is used to be set in a manhole, and includes a piston column, a piston ring, a mesh, and at least three groups of support components arranged along the circumference of the piston column. The piston ring is sleeved on the piston column and can move up and down along the piston column. The support component includes a support rod and a drive rod. The upper end of the support rod is hinged on the piston ring, the inner end of the drive rod is hinged on the piston column, and the outer end is hinged to the support rod. The edge of the mesh is fixedly connected to the lower end of each support rod; the piston column is also provided with a locking mechanism for locking the position of the piston ring; when the piston ring is locked by the locking mechanism, the support rod opens outward, and the mesh is unfolded in the open state. The manhole dredging device of the present invention has an integrated design of deposition and removal, and dredging work can be carried out at any time. It has a simple structure, is easy to operate, is easy to carry, and has high work efficiency. The silt in the manhole can be cleaned at one time by just lifting the device.

Description

Technical Field

[0001] The invention relates to the field of municipal drainage, and in particular to a manhole desilting device and method. Background Art

[0002] There are tens of thousands of manholes in urban drainage pipes. The main function of manholes is to facilitate the inspection and dredging of drainage pipes. The long-term accumulation of silt and garbage in the manholes will also block the drainage pipes, so the sediments need to be cleaned every once in a while. Since the manholes are closed for a long time, there are still a lot of odorous and toxic gases in the manholes. These odorous and toxic gases can easily overflow from the manholes, polluting the air around the manholes, causing unpleasant odors around the manholes, affecting the city's living environment and people's health.

[0003] At present, the sludge and garbage in the manholes are mainly cleaned by workers entering the manholes to dig and clean them, and the toxic gases in the manholes are discharged. Then, the garbage floating on the water surface is cleaned with a sieve. Since some manholes are very deep, a long connecting rod is required to clean them with a sieve, which makes cleaning very inconvenient. Since the sludge sinks underwater for a long time, it is not only large in quantity but also difficult to clean. The space in the manhole is small and the environment is very bad. The labor intensity of workers cleaning it is very high and the cleaning time is long. There are many cases of workers being poisoned in the manholes, which sometimes even threaten their lives. In order to avoid workers going down the manhole, vacuum sludge suction trucks are also used to clean the sludge, or manually operated grab sludge removal trucks are used. However, since the sludge and water in the sludge tank are layered, the vacuum sludge suction truck can suck out the water very well, but the efficiency of sludge suction is not high, and the function is single, and the cost of equipment and maintenance is relatively high. In addition, since the operator of the dredging truck cannot directly observe the conditions inside the manhole and needs others to guide the operation, there are visual errors, and there is a problem of poor positioning accuracy during the manhole dredging process, resulting in poor efficiency. At the same time, the dredging truck is large in size. When cleaning manholes near roads, it has a greater impact on traffic. The grab drive of the dredging truck requires an engine to provide power, which not only consumes oil resources, but also its exhaust gas will increase harm to the urban environment. In addition, the dredging truck equipment is relatively expensive and requires professional operators, resulting in a relatively high cost for using dredging trucks to clean manholes. Therefore, the manhole cleaning method currently widely used in China is still manual cleaning.

[0004] Manhole cleaning is an operation in a confined space. The decomposition of organic matter in the manhole water and the discharge of industrial wastewater will cause the accumulation of hazardous gases such as methane and toxic gases. The working environment is harsh and it is not suitable for workers to directly enter the manhole to dig. Manual work is time-consuming, labor-intensive, dirty, tiring, and inefficient. It is very inconvenient to operate, labor-intensive, and very hard. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a manhole dredging device and method, which has a simple structure, simple operation, high dredging efficiency, and is reusable, low-carbon and environmentally friendly.

[0006] To achieve the above-mentioned purpose, the present invention provides a manhole dredging device, which is used to be set in a manhole, comprising a piston column, a piston ring, a mesh, and at least three groups of support components arranged along the circumference of the piston column, the piston ring is sleeved on the piston column and can move up and down along the piston column, the support component comprises a support rod and a drive rod, the upper end of the support rod is hinged on the piston ring, the inner end of the drive rod is hinged on the piston column, and the outer end is hinged to the support rod, the edge of the mesh is fixedly connected to the lower end of each support rod; the piston column is also provided with a locking mechanism for locking the position of the piston ring; when the piston ring is locked by the locking mechanism, the support rod is opened outward, and the mesh is unfolded in the open state.

[0007] Furthermore, an operating cable is provided at the upper end of the piston column.

[0008] Furthermore, the mesh is a geotextile.

[0009] Furthermore, an elastic rope is provided between the lower ends of adjacent support rods, and the edge of the mesh cloth is connected to the elastic rope.

[0010] Furthermore, it also includes a cable, one end of which is connected to the piston ring, and the other end of which is connected to the edge of the mesh.

[0011] Furthermore, a connecting block is provided at the bottom end of the piston column, and the inner end of the driving rod is hinged on the connecting block.

[0012] Furthermore, a groove is provided on the circumferential surface of the piston column, and the locking mechanism includes a pin clamp and an elastic reset structure arranged in the groove, and the elastic reset structure acts on the pin clamp to make the pin clamp protrude from the circumferential surface of the piston column.

[0013] Furthermore, the locking mechanism also includes a limit rod arranged on the peripheral surface of the piston column, and the limit rod is used to abut against the lower end of the piston ring.

[0014] Furthermore, a handle is provided on the piston ring.

[0015] The present invention also provides a manhole dredging method, which is performed using the manhole dredging device described above and comprises the following steps:

[0016] S1. Place the manhole desilting device into the manhole and open it to the unfolded state. After the mesh is unfolded, place it at the bottom of the manhole with the edge of the mesh close to the manhole wall;

[0017] S2. After the manhole silt removal device is placed, the silt falls directly onto the mesh and is collected, and the manhole silt removal device continues to collect;

[0018] S3. Release the locking mechanism, lift up the piston ring, and the mesh will sink under the gravity of the silt. The manhole dredging device will be retracted, and the mesh will form a net bag to collect the silt. Take the manhole dredging device out of the manhole.

[0019] As described above, the manhole desilting device and method according to the present invention have the following beneficial effects:

[0020] By setting a piston column, a piston ring, a mesh, a locking mechanism, and a supporting assembly, when not in use, the manhole dredging device is in a folded state and occupies a small space. When in use, the manhole dredging device is placed in the manhole and opened to the open state, and the position of the piston ring is locked by the locking mechanism. The support rod and the driving rod are fixed, and the driving rod supports the support rod. The mesh is unfolded by the support rod and spreads across the entire bottom of the manhole. After the silt enters the manhole with the sewage, it falls onto the mesh and continues to work. The silt can be precipitated at any time, and the manhole dredging device can be folded and taken out at any time to complete the dredging work. After the silt in the mesh is removed, the manhole dredging device can be put back into use. The manhole dredging device of the present invention proposes an innovative design, which changes the previous design concept of allowing silt to sink into the manhole and accumulate to a certain level before removing it. It provides an integrated design of deposition and removal, and dredging work can be carried out at any time. The device has a simple structure, is easy to operate, easy to carry, easy to operate, and has high work efficiency. Only the device needs to be lifted to clean the silt in the manhole at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the manhole dredging device of the present invention.

[0022] Figure 2 It is a schematic diagram of the manhole desilting device of the present invention when it is folded.

[0023] Figure 3 It is a schematic diagram of the opening process of the manhole desilting device of the present invention.

[0024] Figure 4 It is a schematic diagram of the arrangement of the manhole desilting device of the present invention in a square manhole.

[0025] Figure 5 It is a schematic diagram of the arrangement of the manhole desilting device of the present invention in a circular manhole.

[0026] Component number description

[0027] 1 Piston rod

[0028] 1a Connection block

[0029] 2 Piston rings

[0030] 2a Handle

[0031] 3 Support components

[0032] 31 Support rod

[0033] 32 Drive rod

[0034] 4 Locking mechanism

[0035] 41. Pin Card

[0036] 42 Limitation

[0037] 5. Mesh

[0038] 6 Elastic cord

[0039] 7 Operation Index

[0040] 8. Silt

[0041] 9. Cable

[0042] 10 Manhole wall DETAILED DESCRIPTION

[0043] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0044] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0045] See also Figures 1 to 5The present invention provides a manhole dredging device, which is used to be set in a manhole, including a piston column 1, a piston ring 2, a mesh 5, and at least three groups of support components 3 arranged along the circumference of the piston column 1. The piston ring 2 is sleeved on the piston column 1 and can move up and down along the piston column 1. The support component 3 includes a support rod 31 and a driving rod 32. The upper end of the support rod 31 is hinged on the piston ring 2, the inner end of the driving rod 32 is hinged on the piston column 1, and the outer end is hinged to the support rod 31. The edge of the mesh 5 is fixedly connected to the lower end of each support rod 31; a locking mechanism 4 for locking the position of the piston ring 2 is also provided on the piston column 1; when the piston ring 2 is locked by the locking mechanism 4, the support rod 31 is opened outward, and the mesh 5 is unfolded in the open state.

[0046] In the present invention, the number of support components 3 is determined according to the shape of the manhole and actual needs. The support components 3 are at least four groups, which can support the mesh 5 to be unfolded. Figure 4 For a square manhole, there are at least four support components 3, which are located at the four corners of the square and can stretch the mesh 5 to a square shape to match the shape of the manhole; see Figure 5 For a circular manhole, at least 6 groups of support components 3 are provided, so that the mesh 5 is polygonal when unfolded, as close to a circle as possible, and matches the shape of a circular manhole. The length of the support rod 31 and the length of the driving rod 32 are set as required.

[0047] The basic working principle of the manhole desilting device of the present invention is: when not in use, the manhole desilting device is in a folded state and occupies a small space. When in use, the device is opened to the open state, see Figure 1 and Figure 3 , and then put the device into the manhole. The opening operation is as follows: pull the piston column 1 upward, the piston column 1 drives the driving rod 32 to flip outward and open, the driving rod 32 drives the support rod 31 to flip outward and open around its upper hinge point, the lower end of the support rod 31 opens the mesh 5, and when the piston ring 2 is located at the designated locking position on the piston column 1, the locking mechanism 4 is used to lock the position of the piston ring 2, and the manhole desilting device is in the open state, see Figure 1The mesh 5 is unfolded by the support rod 31 , and the size and shape of the mesh 5 match the shape and size of the manhole, covering the entire bottom of the manhole. After the silt 8 enters the manhole with the sewage, it falls on the mesh 5 and continues to work. The silt 8 can be deposited at any time, and the manhole dredging device can be taken out at any time to remove the silt 8. The folding operation is specifically as follows: release the locking mechanism 4, and then lift the piston ring 2 upward. Under the gravity of the silt 8, the middle part of the mesh 5 sinks, and the edge is lifted to form a mesh bag, which wraps the silt 8 therein. The support rod 31 rotates inwardly around its upper end hinge point and moves inwardly under the action of the edge of the mesh 5. The driving rod 32 flips inwardly and moves downward, the piston column 1 moves downward, and the support rod 31 and the driving rod 32 gradually get close to the piston column 1, and finally reach a folded state. Figure 2 , then the manhole desilting device is taken out of the manhole, and the desilting work is completed. Then the silt in the mesh cloth 5 is removed, and the manhole desilting device can be put into use again.

[0048] The manhole dredging device of the present invention proposes an innovative design, which changes the previous design concept of allowing the silt 8 to sink to the bottom of the manhole and accumulate to a certain level before removing it. It provides an integrated design of deposition and removal, and dredging work can be carried out at any time. The device has a simple structure, is easy to operate, easy to carry, easy to operate, and has high work efficiency. Only the device needs to be lifted after the silt is settled, and the silt in the manhole can be cleaned at one time.

[0049] See also Figures 1 to 5 The present invention is further described below with a specific embodiment:

[0050] See also Figure 4 and Figure 5 In this embodiment, each support rod 31 is of equal length. When the manhole desilting device is in the manhole and in the open state, the piston rod is at the center of the manhole, the mesh 5 is laid at the bottom of the manhole, the edge of the mesh 5 is close to the manhole wall 10, and the piston column 1 is at the height of the manhole cover, that is, the manhole desilting device is equivalent to the manhole depth H at this time. The upper hinge point of the driving rod 32 is generally located at the design water level h+100mm. When the manhole depth is small, this requirement may not be made. In the open state, the driving rod 32 preferably forms an angle of 3° with the horizontal plane.

[0051] In this embodiment, see Figure 1 , Figure 2 and Figure 3 The piston ring 2 is a circular ring component sleeved on the piston column 1, generally made of a galvanized pipe, and its inner diameter should be consistent with the diameter of the piston column 1. Preferably, two U-shaped handles 2a are symmetrically arranged on the upper end of the piston ring 2, and the handles 2a are composed of flexible cables to facilitate the operation of the piston ring 2.

[0052] The length of the piston column 1 should be determined according to the required height after folding, and the diameter should not be too small to ensure a certain rigidity. The piston column 1 should not be too long to avoid exceeding the manhole cover. As a preferred design, in this embodiment, see Figure 1 , Figure 2 and Figure 3 An operating cable 7 is provided at the upper end of the piston column 1. When the manhole dredging device is in the open state, the piston ring 2 is on the piston column 1. When it is in the retracted state, the piston ring 2 is located above the piston column 1. At this time, the operating cable 7 passes through the piston ring 2, so that the length of the piston column 1 does not need to be too long, and the piston column 1 will not be higher than the manhole cover. When the manhole dredging device is moved from the open state to the retracted state, the operating cable 7 is pulled upward to drive the piston column 1 to move upward, and the manhole dredging device can be lifted out of the manhole. In addition, a hand ring is provided at the upper end of the operating cable 7 for easy operation.

[0053] In this embodiment, see Figure 1 , Figure 4 and Figure 5 As a preferred design, the support assembly 3 is arranged in a circumferential annular array along the piston column 1. When viewed from above the manhole desilting device, the support rods 31 are radially arranged along the radial direction of the piston column 1. A connecting block 1a is provided at the bottom end of the piston column 1, and the inner end of the drive rod 32 is hinged on the connecting block 1a, and the connecting block 1a is generally larger than the inner hole of the piston ring 2. The drive rod 32 is made of steel with a certain rigidity and is not easily deformed. The support rod 31 is the main component for directly opening and closing the mesh 5. It is made of galvanized steel with a certain elasticity. The upper end of the support rod 31 is hinged to the bottom end of the piston ring 2 and always rotates around the hinge point.

[0054] In this embodiment, see Figure 4 and Figure 5 The mesh 5 is round or square when unfolded and is made of geotextile. Its specifications and strength are determined as needed. When the strength of the fabric does not meet the requirements, a geotextile reinforcement belt can be used. Its strength should be calculated based on the weight of the mud 8 in the bag during lifting. The pore size of the geotextile must match the composition of the collected mud 8, so as to prevent the mud 8 from being lost in large quantities and to allow the water in the mesh to be discharged as quickly as possible.

[0055] As a preferred design, in this embodiment, see Figure 1 , Figure 2 and Figure 3, an elastic rope 6 is provided between the lower ends of adjacent support rods 31, and the elastic rope 6 can be a rubber belt. A flexible side rope is provided at the edge of the mesh 5, and the side rope is tied to the elastic rope 6. Alternatively, the side rope of the mesh 5 is elastic, and the elastic side rope is connected to the lower end of the support rod 31 to form the elastic rope 6. When the manhole desilting device is in the open state, the elastic rope 6 is stretched to limit the unfolding of the mesh 5. The lower end of the support rod 31 is bent inwardly for a distance under the action of the elastic tension, and the support rod 31 remains stably open under the support of the elastic tension and the driving rod 32. After the locking mechanism 4 is released, the support rod 31 moves inward and rotates around the hinge under the elastic contraction force of the elastic rope 6, and the elastic rope 6 plays a role in assisting the folding. In this embodiment, the size of the mesh 5 is designed with a margin and a looseness so that when it is lifted, the mud and sand 8 will not flow out from the edge of the bag with the water. For a square manhole, the side length of the mesh 5 can be determined based on the side length B of the manhole bottom surface and the deformation of the lower end of the support rod 31; for a circular manhole, the diameter of the mesh 5 is determined based on the diameter of the manhole bottom surface and the deformation of the lower end of the support rod 31.

[0056] In this embodiment, see Figure 4 As a preferred design, the manhole desilting device also includes a cable 9, one end of which is connected to the piston ring 2 and the other end is connected to the edge of the mesh 5. Its function is to provide tension to the edge of the mesh 5 when lifting, so that it can stably form a bag to ensure that the mud and sand 8 in the bag does not flow out from the concave part of the edge, and ensure that the mesh 5 can be lifted smoothly after being filled with mud and sand 8. The cables 9 should be symmetrically arranged, and their number should be determined according to the side length of the mesh. Generally, when the manhole is square, only four support rods 31 are usually arranged. At this time, several cables 9 should be arranged on each side. When there are more support rods 31 in the circular manhole, no additional cables 9 are required.

[0057] In this embodiment, see Figure 1 , Figure 2 and Figure 3 As a preferred design, a groove is provided on the circumference of the piston column 1, and the locking mechanism 4 includes a pin card 41 and an elastic reset structure arranged in the groove. The elastic reset structure acts on the pin card 41 to make the pin card 41 protrude from the circumference of the piston column 1. In addition, the locking mechanism 4 also includes a limit stem 42 arranged on the circumference of the piston column 1, and the limit stem 42 is used to abut against the lower end of the piston ring 2. When the manhole desilting device is opened, see Figure 3 , lift the piston rod, press the pin card 41 to make it sink into the groove, so that the piston ring 2 can slide up and down the piston rod and abut on the limit stem 42, and then the pin card 41 convexes and abuts on the upper end of the piston ring 2, thereby locking the piston ring 2.

[0058] The manhole dredging device of the present invention has components with the same name that are identical and can be manufactured in a standardized manner. The same components can be used universally. Some parts can be manufactured in a standardized manner in a factory and then assembled flexibly to form a complete device, which can then be opened and folded for operation and debugged 2 to 3 times. After debugging, the manhole dredging device without any problems can be stored in a warehouse in a folded state for easy storage. When it is needed, it can be transported to the site, manually opened and placed in the manhole.

[0059] The present invention also provides a manhole dredging method, which uses the above-mentioned manhole dredging device and includes the following steps:

[0060] S1. Place the manhole dredging device into the manhole and open it to the expanded state; specifically, first open the manhole dredging device from the folded state to the expanded state, lift the operating cable 7 by the hand ring, the piston column 1 brings the driving rod 32 and the support rod 31 to open outward, the support rod 31 opens the mesh 5, and then place the manhole dredging device into the manhole, the expanded mesh 5 is placed at the bottom of the manhole, and the edge of the mesh 5 is close to the manhole wall 10. Of course, in some cases, the manhole dredging device can also be placed into the manhole first and then opened.

[0061] S2. The manhole silt removal device is fixed, and the silt 8 falls onto the mesh 5 and is collected, and the manhole silt removal device continues to collect the silt.

[0062] S3, release the locking mechanism 4, lift the piston ring 2 through the U-shaped handle 2a, the mesh 5 sinks under the gravity of the mud and sand 8, the support rod 31 and the drive rod 32 are retracted inward, the piston column 1 moves downward, the manhole dredging device is in the retracted state, the mesh 5 forms a net bag, and the mud and sand 8 are collected therein; the manhole dredging device is taken out of the manhole.

[0063] As can be seen from the above, the manhole desilting device and method of the present invention have the following advantages:

[0064] 1. A new design is proposed, which changes the previous design idea of ​​letting the silt 8 sink to the bottom of the manhole and accumulate to a certain level before removing it. It provides an integrated design of sedimentation and removal, so that dredging work can be carried out at any time.

[0065] 2. The device has a simple structure, is easy to operate, easy to carry, works stably and reliably, is easy to operate, and has high work efficiency. You only need to lift the device to clean the silt in the manhole at one time, reducing the siltation and blockage of the manhole, and has obvious environmental and economic benefits.

[0066] 3. The structure of the whole device is simple, and each part can be made of standard parts and standardized. The same components can be used universally, with strong substitutability, which can ensure product quality and low manufacturing cost.

[0067] In summary, the invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A manhole desilting device, used to be arranged in a manhole, characterized in that: The invention comprises a piston column (1), a piston ring (2), a mesh (5), and at least three groups of support components (3) arranged along the circumference of the piston column (1); the piston ring (2) is sleeved on the piston column (1) and can move up and down along the piston column (1); the support component (3) comprises a support rod (31) and a drive rod (32); the upper end of the support rod (31) is hinged on the piston ring (2); the inner end of the drive rod (32) is hinged on the piston column (1) and the outer end is hinged to the support rod (31); the edge of the mesh (5) is fixedly connected to the lower end of each support rod (31); the piston column (1) is also provided with a locking mechanism (4) for locking the position of the piston ring (2); when the piston ring (2) is locked by the locking mechanism (4), the support rod (31) is opened outwards, and the mesh (5) is unfolded in the open state; an elastic rope (6) is provided between the lower ends of adjacent support rods (31) ), the edge of the mesh (5) is connected to the elastic rope (6); it also includes a cable (9), one end of the cable (9) is connected to the piston ring (2), and the other end is connected to the edge of the mesh (5); a groove is provided on the circumferential surface of the piston column (1), the locking mechanism (4) includes a pin clamp (41) and an elastic reset structure arranged in the groove, the elastic reset structure acts on the pin clamp (41) to make the pin clamp (41) protrude from the circumferential surface of the piston column (1), the locking mechanism (4) also includes a limit stem (42) arranged on the circumferential surface of the piston column (1), the limit stem (42) is used to abut against the lower end of the piston ring (2); an operating cable (7) is provided at the upper end of the piston column (1); when the manhole desilting device is in the open state, the piston ring (2) is on the piston column (1), and when in the retracted state, the piston ring (2) is located above the piston column (1), and at this time the operating cable (7) passes through the piston ring (2).

2. The manhole desilting device according to claim 1, characterized in that: The mesh cloth (5) is a geotextile.

3. The manhole desilting device according to claim 1, characterized in that: A connecting block (1a) is provided at the bottom end of the piston column (1), and the inner end of the driving rod (32) is hinged on the connecting block (1a).

4. The manhole desilting device according to claim 1, characterized in that: The piston ring (2) is also provided with a handle (2a).

5. A method for desilting a manhole, characterized in that: The method of using the manhole desilting device as claimed in claim 1 comprises the following steps: S1. Place the manhole desilting device into the manhole and open it to an unfolded state. After the mesh (5) is unfolded, it is placed at the bottom of the manhole, and the edge of the mesh (5) is close to the manhole wall (10); S2. After the manhole silting device is placed, the silt (8) falls directly onto the mesh (5) and is collected, and the manhole silting device continues to collect the silt; S3, release the locking mechanism (4), lift the piston ring (2), and the mesh (5) sinks under the gravity of the mud and sand (8). The manhole dredging device is in a folded state, and the mesh (5) forms a net bag to collect the mud and sand. The manhole dredging device is taken out of the manhole.

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