A device and method for dredging quicksand from drainage pipes

Abstract

This invention discloses a device and method for dredging quicksand from drainage pipes. The dredging device includes a dredging head rotatably connected to one end of a housing. Multiple dredging blades are mounted on the dredging head. Multiple sets of fixing springs are connected to the outer wall of the housing. These springs generate a reaction force upon contact with the inner wall of the drainage pipe, preventing the housing from rotating with the dredging head when it rotates. The dredging head is connected to a hydraulic motor. Multiple sets of tracked conveyors are installed inside the housing to transport quicksand near the dredging head to the end away from it. This invention provides a device and method for dredging quicksand from drainage pipes. The device uses a manual traction device to clean the quicksand from the pipe. A traction steel cable controls the forward and backward movement of the dredging head. If the dredging head experiences mechanical failure, it can be pulled back to the starting well. The device is designed for recovery in extreme situations, resulting in low maintenance costs during use.

Description

Technical Field

[0001] This invention belongs to the field of pipeline dredging technology, and specifically relates to a device and method for dredging quicksand from drainage pipelines. Background Technology

[0002] As a vital urban infrastructure, the sewer system expands with the growth of the urban population. Every day, sewage and household waste (containing grease, scale, and tangled debris) are discharged into the sewers, along with surface sediment brought in by rainwater. Over the years, this accumulation leads to blockages and siltation. Older sewer systems, due to their lower initial design standards, suffer even more severe blockages, seriously affecting their normal drainage function. Because sewer dredging and clearing are generally difficult, unsafe, and costly, some areas have had to abandon and rebuild their entire sewer system.

[0003] Currently, the more advanced high-pressure water jet propulsion sewer cleaning and dredging tools (commonly known as water rats) can only dredge small-diameter sewers with a diameter of less than 500mm. Even the few ultra-high-pressure water jet propulsion cleaning and dredging tools can only dredge medium and small-diameter sewers with a diameter of up to 1000mm.

[0004] For large-diameter sewer pipes, manual dredging is usually the only option. This method is not only labor-intensive and inefficient, but also poses a significant risk to workers operating in such confined spaces due to the presence of harmful gases in the sewers.

[0005] Pipelines laid in quicksand are susceptible to damage when they are broken or leaking. Large amounts of quicksand can enter the sewage system, severely impacting its flow capacity. The high density and low fluidity of quicksand make it impossible to use dredging trucks for clearing, while traditional manual cleaning methods are inefficient and pose significant safety hazards.

[0006] Chinese patent application CN201410244030.7 discloses a pipeline dredging method and a pipeline dredging robot. The robot has a relatively complex structure, is not flexible in movement, and has a small applicable range. The dredging process requires back-and-forth movement and multiple entries and exits into the pipeline to clean the quicksand inside the pipeline, which increases the construction cost.

[0007] Chinese patent application CN 105604178 B discloses an automatic cleaning device, including a sand-discharging propeller and a sand-stirring device at the front end of the propeller. The sand-discharging propeller includes a main shaft and sand-pushing blades on the outer circumferential surface of the main shaft. The sand-pushing blades are spirally wound around the outer circumferential surface of the main shaft along its axial direction, and sand-accumulating gaps are formed between adjacent sand-pushing blades. In this embodiment of the invention, by providing continuous sand-pushing blades on the outer circumferential surface of the main shaft of the sand-discharging propeller, and forming sand-accumulating gaps between adjacent sand-pushing blades, the sand-discharging propeller can enter a channel and rotate. The rotating sand-pushing blades form a sand-discharging channel. The sand-stirring device at the front end of the propeller allows the sand and gravel in the channel to be discharged out of the channel along the sand-pushing blades on the propeller, thus cleaning out the sand and gravel deposited on the connecting channel and preventing sewer blockage. This patent enables the removal of quicksand from drainage pipes, but it still cannot automatically transport the quicksand collected from the drainage pipes to the ground. Therefore, the entire device needs to be installed back and forth between the ground and the pipes, which not only results in low efficiency in removing quicksand from the pipes, but also in high construction costs. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device and method for clearing silt from flowing sand in drainage pipes, thereby improving the efficiency of clearing silt from flowing sand in drainage pipes.

[0009] In a first aspect, the present invention provides a drainage pipe quicksand dredging device, comprising a dredging head rotatably connected to one end of a housing, wherein a channel is provided between the dredging head and the housing for quicksand to pass through and enter the housing; the dredging head is equipped with multiple dredging blades, and multiple sets of fixing springs are connected to the outer wall of the housing, the fixing springs being used to generate a reaction force after abutting against the inner wall of the drainage pipe, so as to prevent the housing from rotating with the dredging head when the dredging head rotates; the dredging head is drivenly connected to a hydraulic motor, and multiple sets of tracked conveyors are provided inside the housing, the tracked conveyors being used to transport quicksand close to the dredging head to the end away from the dredging head.

[0010] Preferably, it also includes a transport mechanism, which includes a traction rope with multiple transport buckets connected at intervals on the traction rope. The traction rope is connected to a winch, and the transport buckets are umbrella-shaped and are in an open state after being loaded with quicksand.

[0011] Preferably, the traction rope is connected to the housing through guide gears. The guide gears are respectively located at the front and rear ends of the sand-loading position of the transport bucket. The tooth pitch of the guide gear at the front end is larger than that of the guide gear at the rear end, so that when the empty transport bucket passes the guide gear at the front end, the transport bucket is in a retracted state, and when the transport bucket loaded with sand passes the guide gear at the rear end, the transport bucket is in an open state.

[0012] Preferably, the guide gear located at the front end and the guide gear located at the rear end are on the same horizontal plane.

[0013] Preferably, a hydraulic torque amplifier is provided between the dredging head and the hydraulic motor.

[0014] Preferably, the tracked conveyor is configured in four groups, evenly distributed within the housing.

[0015] Preferably, a traction steel wire rope is provided at the center of the dredging machine head.

[0016] Preferably, one end of the fixing spring is hinged to the housing, the middle part of the fixing spring is connected to a hydraulic cylinder, and the hydraulic cylinder is hinged to the outer wall of the housing.

[0017] Preferably, the fixing spring is curved and bends away from the housing.

[0018] A second aspect of the present invention provides a method for clearing silt from flowing sand in a drainage pipe, using the aforementioned device for clearing silt from flowing sand in a drainage pipe, specifically including the following steps:

[0019] S1 first uses a cable threader to connect the launching well and the receiving well, and guides the traction steel wire rope through the pipe;

[0020] S2 places the quicksand dredging device inside the drainage pipe and performs machine head debugging, testing whether the dredging cutter head, track conveyor, and fixed spring are in normal working order;

[0021] After the S3 is debugged, pull the traction steel wire rope to move the quicksand dredging device forward along the drainage pipe. When the dredging head encounters the quicksand layer, open the fixing spring to make the fixing spring tightly abut against the inner wall of the drainage pipe, providing the dredging head with the reaction force of digging.

[0022] S4 starts the dredging cutter head to rotate at low speed, maintaining high torque, cutting the quicksand onto the track conveyor, and keeping the quicksand inside the dredging head from accumulating;

[0023] S5 starts the winch, which causes the traction rope to drive the quicksand transport bucket to transport the quicksand at the rear of the machine head to the unloading platform at the inlet of the starting well;

[0024] After S6 completes the quicksand cleaning work of one working section, it first loosens the fixing spring, and then uses the traction steel wire rope to drag the machine head to the next working section.

[0025] S7 repeats steps S4-S6 to complete the quicksand dredging of the drainage pipe section located between the launching well and the receiving well.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention provides a drainage pipe quicksand dredging device and method. The device uses a manual traction device to dredge the quicksand in the pipe. The traction steel wire rope controls the forward and backward movement of the dredging head. If the dredging head experiences mechanical failure, it can be pulled back to the starting well. The device is designed for recovery in extreme situations and has low maintenance costs during use.

[0028] The present invention provides a device and method for dredging quicksand from drainage pipes. By using a fixed spring plate to be set to an open state during the operation of the dredging machine head, the device provides a reaction force for the dredging machine head to dredge and excavate, thereby improving the efficiency of the operation and enabling the quicksand in the pipe to be transported out quickly.

[0029] The present invention provides a device and method for dredging quicksand from drainage pipes. A quicksand transport bucket is installed on a traction rope, and an unloading platform is set up above the wellhead. The wire rope transport bucket continuously transports quicksand up and down, which greatly improves the transport efficiency of quicksand. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a drainage pipe sludge removal device according to one embodiment of the present invention.

[0031] Figure 2 for Figure 2 Side view.

[0032] Figure 3 This is a schematic diagram of the connection between the guide gear and the traction rope in one embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of the fully loaded transport bucket in one embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of the empty state of the transport bucket in one embodiment of the present invention.

[0035] In the above attached figures:

[0036] 10. Dredging machine head;

[0037] 11. Passage;

[0038] 12. Dredging blade;

[0039] 13. Hydraulic torque amplifier;

[0040] 14. Traction wire rope;

[0041] 20. Shell;

[0042] 21. Fixing the spring clip;

[0043] 22. Hydraulic cylinder;

[0044] 30. Tracked conveyor;

[0045] 40. Transportation agencies;

[0046] 41. Towing rope;

[0047] 42. Transport container;

[0048] 43. Guide gear. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0051] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0052] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0053] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] Chinese patent application CN201410244030.7 discloses a pipeline dredging method and a pipeline dredging robot, belonging to the field of drainage pipeline cleaning technology. The technical solution includes a dredging robot body 20, a wire rope traction device, a front dredging bucket 11, a front dredging bucket lifting and tilting mechanism, a rear dredging bucket 1, and a synchronous belt drive device. During the dredging robot's round-trip dredging operation, the dredging robot body drives the front dredging bucket, the rear dredging bucket, and the traction wire rope device to move away from the manhole opening to the position to be dredged in an unloaded state. The traction wire rope drags the dredging robot body, along with the front and rear dredging buckets, towards the manhole opening. During this movement, the front and rear dredging buckets complete the dredging operation. However, the robot has a relatively complex structure, is not flexible in its movement, and has a limited range of applications. The dredging process requires it to move back and forth and enter and exit the pipe multiple times to clean the quicksand inside the pipe, which increases the construction cost.

[0056] In addition, Chinese patent application CN 105604178 B discloses an automatic cleaning device, including a sand-discharging propeller and a sand-stirring device at the front end of the propeller. The sand-discharging propeller includes a main shaft and sand-pushing blades on the outer circumferential surface of the main shaft. The sand-pushing blades are spirally wound around the outer circumferential surface of the main shaft along the axial direction, and sand-accumulating gaps are formed between adjacent sand-pushing blades. In this embodiment of the invention, by providing continuous sand-pushing blades on the outer circumferential surface of the main shaft of the sand-discharging propeller, and forming sand-accumulating gaps between adjacent sand-pushing blades, the sand-discharging propeller can enter the channel and rotate. The rotation of the sand-pushing blades forms a sand-discharging channel. The sand-stirring device at the front end of the propeller allows the sand and gravel in the channel to be discharged out of the channel along the sand-pushing blades on the propeller, thus cleaning out the sand and gravel deposited on the connecting channel and preventing sewer blockage. This patent enables the removal of quicksand from drainage pipes, but it still cannot automatically transport the quicksand collected from the drainage pipes to the ground. Therefore, the entire device needs to be installed back and forth between the ground and the pipes, which not only results in low efficiency in removing quicksand from the pipes, but also in high construction costs.

[0057] Based on this, as a preferred embodiment of the present invention, please refer to the appendix. Figure 1 and attached Figure 2 This embodiment provides a drainage pipe quicksand dredging device, including a dredging head 10, which is rotatably connected to one end of a housing 20. A channel 11 is provided between the dredging head 10 and the housing 20 for quicksand to pass through and enter the housing. Multiple dredging blades 12 are installed on the dredging head 10, and the blades 12 form a certain angle with the end face of the dredging head 10. Multiple sets of fixing springs 21 are connected to the outer wall of the housing 20. The fixing springs 21 are used to form a reaction force after abutting against the inner wall of the drainage pipe to prevent the housing 20 from rotating with the dredging head 10 when it rotates. The dredging head 10 is driven by a hydraulic motor, which is powered by a hydraulic pump station. Multiple sets of tracked conveyors 30 are provided inside the housing 20. The tracked conveyors 30 are used to transport quicksand close to the dredging head 10 to the end away from the dredging head 10.

[0058] In the above embodiment, the tracked conveyor 30 is configured as four groups, which are evenly distributed within the housing 20.

[0059] In some preferred embodiments, please refer to the appendix. Figure 1 Appendix Figure 3 Appendix Figure 4 and attached Figure 5It also includes a transport mechanism 40, which includes a traction rope 41 with multiple transport buckets 42 connected at intervals on the traction rope 41. The traction rope 41 is connected to a winch. In actual use, the winch is arranged at the wellhead of the starting well. The transport buckets 42 are umbrella-shaped and are in an open state after being loaded with quicksand. The transport buckets 42 are formed by multiple baffles hinged at the ends.

[0060] In some preferred embodiments, such as Figures 3-5 As shown, the traction rope 41 is connected to the housing 20 through the guide gear 43. The guide gear 43 is respectively set at the front end and the rear end of the loading position of the transport bucket 42, and the tooth pitch of the guide gear at the front end is larger than the tooth pitch of the guide gear at the rear end.

[0061] In the above embodiment, one purpose of this arrangement is that when the empty transport bucket passes the guide gear located at the front end, the transport bucket 42 is in a retracted state behind the guide gear with a smaller tooth pitch. When the transport bucket loaded with quicksand passes the guide gear located at the rear end, the transport bucket is in an open state. This allows the quicksand in the pipeline to be continuously transported to the ground through the transport bucket 42, and after being unloaded on the ground, it returns to the retracted state. This makes it easy to pull the transport bucket 42 smoothly into the housing 20 by the traction rope 41 when it is empty.

[0062] In some preferred embodiments, the guide gear 43 at the front end and the guide gear at the rear end are on the same horizontal plane. In this arrangement, the transport bucket 42 moves on the horizontal plane, so that the quicksand can be automatically loaded into the transport bucket 42 as quickly as possible. Then, the quicksand is transported to the wellhead of the starting well and unloaded by the traction of the traction rope 41 by the winch.

[0063] In some preferred embodiments, in order to stably provide a large output torque and prevent the dredging head 10 from being unable to scrape the flowing sand into the housing 20 after being blocked by a large amount of flowing sand, a hydraulic torque amplifier 13 is provided between the dredging head 10 and the hydraulic motor in this embodiment.

[0064] In the above embodiment, the main function of the hydraulic torque increaser 13 is to increase the scraping torque of the sludge dredging head 10 on the inner wall of the pipe. When there is tightly adhered quicksand in the pipe, it can be easily scraped by the sludge dredging head 10 and separated from the inner wall of the pipe, and then enter the housing 20.

[0065] In some preferred embodiments, for ease of control and to provide propulsion for the entire device, such as... Figure 1As shown, a traction steel wire rope 14 is provided at the center of the dredging head 10. In this embodiment, the traction steel wire rope 14 can be used to quickly pull the device in a pipe section without quicksand. The device can be started after the device reaches the part with quicksand, thereby improving the work efficiency.

[0066] In the above preferred embodiment, a better control method can be achieved. The device is pulled into contact with quicksand inside the pipe by the traction wire rope 14, and then the device is activated to scrape the quicksand. The method of determining whether the quicksand position has been reached can be based on the resistance encountered by the traction wire rope 14. When the resistance of the traction wire rope 14 suddenly increases, it indicates that the device has encountered quicksand. The device is then activated to scrape the quicksand and transport it to the ground. By pulling the traction wire rope 14 again, it can be determined whether the quicksand at that location has been cleared. The device can then be quickly pulled to the next quicksand location by pulling the traction wire rope 14 again to clear the next quicksand. This can improve the efficiency of the operation.

[0067] In some preferred embodiments, such as Figure 1 As shown, one end of the fixing spring 21 is hinged to the housing 20, and the middle part of the fixing spring 21 is connected to the hydraulic cylinder 22. The hydraulic cylinder 22 is hinged to the outer wall of the housing 20, and the hydraulic cylinder 22 is powered by a hydraulic pump station.

[0068] In the above preferred embodiment, the main function of the fixing spring 21 is to provide a reaction force, that is, to provide sufficient reaction force to fix the housing 20 relatively in the pipe when the device cleans the quicksand, so as to prevent the whole device from moving backward due to the axial reaction force of the quicksand, which would affect the cleaning efficiency and cleaning quality.

[0069] In some preferred embodiments, in order to facilitate the provision of reaction force and ensure the stability of the quicksand cleaning process, the fixing spring 21 in this embodiment is bent and bends away from the housing 20.

[0070] In the above preferred embodiment, the curved fixing spring 21, under the clamping action of the hydraulic cylinder 22, has a certain elastic deformation capability, thereby forming a more stable clamping relationship between the fixing spring 21 and the inner wall of the pipe, and preventing the fixing spring 21 from sliding inside the pipe.

[0071] As another preferred embodiment of the present invention, a method for clearing silt from flowing sand in a drainage pipe is provided, using the above-mentioned device for clearing silt from flowing sand in a drainage pipe, specifically including the following steps:

[0072] S1 first uses a cable threader to connect the launching well and the receiving well, and guides the traction steel wire rope through the pipeline. Divers cooperate in positioning the machine head, installing the steel wire rope, and installing the guide rail at the pipe opening to prevent wear on the steel wire rope and the pipeline.

[0073] S2 places the quicksand dredging device inside the drainage pipe and performs machine head debugging. Tests whether the opening and closing status of the dredging cutter head, crawler conveyor, and fixed spring is normal. The winch of the wellhead unloading platform is tested and the opening and closing degree of the quicksand transport bucket in both forward and reverse circulation is observed.

[0074] After the S3 is debugged, pull the traction steel wire rope to move the quicksand dredging device forward along the drainage pipe. When the dredging head encounters the quicksand layer, open the fixing spring to make the fixing spring tightly abut against the inner wall of the drainage pipe, providing the dredging head with the reaction force of digging.

[0075] S4 starts the dredging cutter head to rotate at low speed, maintaining high torque, cutting the quicksand onto the track conveyor, and keeping the quicksand inside the dredging head from accumulating;

[0076] S5 starts the winch, which causes the traction rope to drive the quicksand transport bucket to transport the quicksand at the rear of the machine head to the unloading platform at the inlet of the starting well;

[0077] After S6 completes the quicksand cleaning work of one working section, it first loosens the fixing spring, and then uses the traction steel wire rope to drag the machine head to the next working section.

[0078] S7 repeats steps S4-S6 to complete the quicksand dredging of the drainage pipe section located between the launching well and the receiving well.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for clearing silt from drainage pipes, characterized in that, The device includes a dredging head, which is rotatably connected to one end of a housing. A channel is provided between the dredging head and the housing for quicksand to pass through and enter the housing. Multiple dredging blades are installed on the dredging head. Multiple sets of fixing springs are connected to the outer wall of the housing. These springs abut against the inner wall of the drainage pipe to generate a reaction force, preventing the housing from rotating with the dredging head when it rotates. The dredging head is connected to a hydraulic motor. Multiple sets of tracked conveyors are installed inside the housing to transport quicksand near the dredging head to the end away from it. It also includes a transport mechanism, which includes a traction rope with multiple transport buckets connected at intervals on the traction rope. The traction rope is connected to a winch. The transport buckets are umbrella-shaped and are in an open state after being loaded with quicksand. The traction rope is connected to the housing through guide gears. The guide gears are respectively set at the front and rear ends of the sand loading position of the transport bucket. The tooth pitch of the guide gear at the front end is larger than that of the guide gear at the rear end, so that when the empty transport bucket passes the guide gear at the front end, the transport bucket is in a retracted state, and when the transport bucket loaded with sand passes the guide gear at the rear end, the transport bucket is in an open state. The guide gear located at the front end and the guide gear located at the rear end are on the same horizontal plane; One end of the fixing spring is hinged to the housing, the middle part of the fixing spring is connected to a hydraulic cylinder, and the hydraulic cylinder is hinged to the outer wall of the housing; The fixing spring is curved and bends away from the housing.

2. The drainage pipe silt removal device according to claim 1, characterized in that, The tracked conveyors are configured in four groups, evenly distributed within the housing.

3. The drainage pipe silt removal device according to claim 1, characterized in that, A hydraulic torque amplifier is installed between the dredging head and the hydraulic motor.

4. The drainage pipe silt removal device according to claim 1, characterized in that, A traction steel wire rope is installed at the center of the dredging machine head.

5. A method for dredging sediment from drainage pipes, characterized in that, The use of the drainage pipe quicksand dredging device according to any one of claims 1-4 specifically includes the following steps: S1 first uses a cable threader to connect the launching well and the receiving well, and guides the traction steel wire rope through the pipe; S2 places the quicksand dredging device inside the drainage pipe and performs machine head debugging, testing whether the dredging cutter head, track conveyor, and fixed spring are in normal working order; After the S3 is debugged, pull the traction steel wire rope to move the quicksand dredging device forward along the drainage pipe. When the dredging head encounters the quicksand layer, open the fixing spring to make the fixing spring tightly abut against the inner wall of the drainage pipe, providing the dredging head with the reaction force of digging. S4 starts the dredging cutter head to rotate at low speed, maintaining high torque, cutting the quicksand onto the track conveyor, and keeping the quicksand inside the dredging head from accumulating; S5 starts the winch, which causes the traction rope to drive the quicksand transport bucket to transport the quicksand at the rear of the machine head to the unloading platform at the inlet of the starting well; After S6 completes the quicksand cleaning work of one working section, it first loosens the fixing spring, and then uses the traction steel wire rope to drag the machine head to the next working section. S7 repeats steps S4-S6 to complete the quicksand dredging of the drainage pipe section located between the launching well and the receiving well.

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