Desilting and slag removal method for gravity flow sewage pipes

Abstract

The present invention proposes a method for desilting and removing slag from gravity-flow sewage pipes, which is characterized in that a chain guide rail is installed in an inspection well and a drainage pipe, a desilting and removing device is nested in a hanging bracket, the hanging bracket is hung on the chain guide rail, and moves along the chain guide rail in the drainage pipe for in-situ desilting and removing slag from the drainage pipe, and the sludge collected by the desilting and removing device is transported to the ground outside the inspection well by a sludge suction and mud collection vehicle. The present invention makes full use of the internal space of the inspection well and the drainage pipe, realizes the transportation and operation of the desilting and removing device in the drainage pipe through the ingenious design of the chain guide rail and the hanging bracket, and realizes in-situ desilting and dredging of the drainage pipe through the desilting and removing device that integrates a slag bucket, a filter screen, and a mud bucket. Compared with the prior art, the present invention has the outstanding features of strong applicability, easy implementation, diverse functions, flexible operation, and significant effect.

Description

Technical Field

[0001] The invention belongs to the technical field of municipal drainage, and relates to a method for desilting and removing slag from a gravity flow sewage pipe. Background Art

[0002] Drainage pipes are engineering facilities that collect and transport urban sewage, industrial wastewater, and rainwater. In recent years, with the accelerated urbanization process in my country, the number and scale of drainage pipe construction have increased year by year. The increasingly sophisticated drainage pipe system has facilitated the transportation of various types of sewage and rainwater in cities. However, as the drainage pipe system has grown in size, problems such as water pollution and secondary disasters have become increasingly prominent.

[0003] Sewage transported through gravity-flow sewers contains a high concentration of suspended particulate matter, which easily settles and forms silt in larger, slower-flowing pipe sections, causing pipe blockages. Furthermore, in combined sewer systems, the slower flow rate in larger pipes during dry weather causes suspended particulate matter to settle and form silt. During rainy days, the surge in water volume flushes out the silt, leading to frequent black and smelly water in rivers and lakes.

[0004] Currently, desilting gravity-flow sewage pipes is limited to smaller pipes. High-pressure water jets, manual pulling, or push-pull methods are typically used to remove particles and sludge from the pipes, or to push them to larger pipes. However, effective desilting and sludge removal technologies are still lacking for larger pipes. Therefore, there is an urgent need for new technologies that can effectively remove scum, suspended particles, and sludge from drainage pipes. Summary of the Invention

[0005] The purpose of the present invention is to make full use of the internal space of the drainage pipe by implementing appropriate engineering modifications to the drainage pipe and inspection well, transport the silt remover into the interior of the drainage pipe through the design of chain guide rails and hanging brackets, and use a silt suction and mud collection truck to remove the mud scraped by the silt remover, thereby achieving silt removal and mud removal in the drainage pipe.

[0006] To achieve the above-mentioned object, the present invention proposes a method for desilting and removing slag for a gravity flow sewage pipe, characterized in that the method comprises:

[0007] Installation phase:

[0008] Step 1: Empty the sewage in the drainage pipe in advance so that operators can enter the inspection well for operation;

[0009] Step 2: Install a chain guide rail in the inspection well. The chain guide rail includes a driving sprocket, a driven pulley and a chain that cooperates with it;

[0010] Step 3: Fix one or more hanging brackets to the chain;

[0011] Step 4: Install the silt remover on the hanging bracket, and adjust the lifting frame on the hanging bracket according to the diameter and water level of the drainage pipe so that the slag bucket and mud bucket of the silt remover can easily remove the slag and mud in the drainage pipe;

[0012] Step 5: The motor drives the active sprocket to rotate, and then drives the chain, thereby transporting the hanging bracket with the silt remover installed into the drainage pipe;

[0013] Step 6: The silt extraction and collection truck is located on the ground outside the inspection well;

[0014] Step 7: The drainage pipe is flowing with water normally;

[0015] Operation phase:

[0016] Step 1: The motor drives the active sprocket to rotate, which in turn drives the chain, thereby transporting the suspension bracket into the drainage pipe, and making the movement direction of the suspension bracket in the drainage pipe and the opening direction of the slag bucket and mud bucket of the silt remover opposite to the flow direction of sewage in the drainage pipe;

[0017] Step 2: When the desilter moves relative to the sewage, the slag bucket can skim off the scum on the upper layer of the sewage, the filter can filter out the suspended particles in the middle layer of the sewage, and the mud bucket can remove the silt in the lower layer of the sewage;

[0018] Step 3: The suspension bracket is transported from the drainage pipe to the outside of the inspection well by the continuous rotation of the motor. At this time, the scum, suspended particles and sludge collected by the silt remover are transferred to the sludge storage tank of the vehicle by the silt suction and sludge collection vehicle;

[0019] Step 4: Keep the motor running continuously to transport the cleaned silt remover back into the drainage pipe, and then repeat steps 2 and 3;

[0020] Maintenance phase:

[0021] Step 1: When the desilting and slag remover is blocked or damaged, the driving sprocket is rotated in the reverse direction by the motor, so that the desilting and slag remover that needs to be repaired is transported to the top of the inspection well along with the chain;

[0022] Step 2: Remove the silt remover from the hanging bracket and inspect and clean it;

[0023] Step 3: Re-fix the silt remover on the hanging bracket and rotate the driving sprocket through the motor, so that the repaired silt remover is transported into the drainage pipe along with the chain, and then carry out steps 1 to 4 of the operation stage.

[0024] Furthermore, the chain guide rail includes a supporting frame, the supporting frame is equipped with a driving sprocket, a driven pulley and a chain matched therewith, the motor is connected to the driving sprocket, and is used to drive the driving sprocket to rotate, thereby driving the chain to move, the driven pulley is provided with a wheel groove, the chain groove of the chain is engaged with the gear teeth of the driving sprocket, and the outer side of the chain is engaged with the wheel groove of the driven pulley;

[0025] Furthermore, the chain guide rail is installed as follows: a part of the supporting frame and the driving sprocket are installed above the detection well, and the fixed node, the frame base and the driven pulley are installed in the detection well, so that the chain has a single-strand mouth structure.

[0026] Furthermore, the supporting frame and the side wall of the inspection well are provided with fixed nodes, and the fixed nodes are the connection points of the supporting frame and the side wall of the inspection well, and the connection method is welding, bonding or expansion screw fixing; a frame base is provided at the bottom of the supporting frame, and the frame base is placed at the bottom of the inspection well, and its bottom surface coincides with the bottom surface of the inspection well.

[0027] Furthermore, the driving sprocket is located at the top of the supporting frame, and the driven pulley is located at the bottom of the supporting frame; the tooth pitch of the driving sprocket is 10-15 cm, and the tooth thickness is 7-9 cm; the wheel groove width of the driven pulley is 5-8 cm, and the wheel groove depth is 6-10 cm; the wheel surfaces of the driving sprocket and the driven pulley are both located in the same plane as the axis of the drainage pipe.

[0028] Furthermore, the suspension bracket includes a frame body and a hook connected to the frame body, the hook passes through the pin shaft of the chain, thereby connecting the frame body to the roller chain of the chain guide rail; the frame body includes an upper frame, a lifting frame arranged at the lower part of the upper frame, and a lower frame that can move up and down along the lifting frame, the upper frame is equipped with a slag bucket, and the lower frame is equipped with a mud bucket. The height of the slag bucket and the mud bucket in the drainage pipe can be adjusted by the lifting frame, making it convenient to skim off slag and shovel away silt.

[0029] Furthermore, a filter screen is installed above the mud bucket of the desilting and slag remover, and the plane where the filter screen is located is perpendicular to the axis of the drainage pipe.

[0030] Furthermore, the silt extraction and mud collection vehicle includes a mud storage tank, a suction pump and a mud extraction pipe, and the mud collection pipe is placed at the bottom of the downstream inspection well of the silt crusher.

[0031] Furthermore, the number of the hooks is 2 or more to limit the axial displacement of the hanging bracket in the drainage pipe.

[0032] Furthermore, the upper portion of the hook is a hook-shaped object, and the lower portion is a connecting rod connected to the frame body. The connecting rod needs to have a certain length so that the hanging bracket can smoothly pass through the right-angle bend when moving with the chain.

[0033] Furthermore, the hanging bracket includes a double-sided telescopic rod located on both sides of the frame body, and the ends of the double-sided telescopic rod system have elastic telescopic rods with universal wheels. The telescopic direction is perpendicular to the axis of the drainage pipe, which is used to limit the lateral displacement of the hanging bracket in the drainage pipe.

[0034] The present invention makes full use of the internal space of the inspection well and the drainage pipe, and realizes the transportation and operation of the silt remover in the drainage pipe through the ingenious design of the chain guide rail and the hanging bracket, and realizes the in-situ dredging and silting of the drainage pipe through the silt remover integrated with the slag bucket, filter screen and mud bucket.

[0035] Compared with the prior art in the same field, the present invention has the following notable features:

[0036] 1. Strong applicability

[0037] Aiming at the in-situ purification problem of drainage pipes, the system can adapt to drainage pipes of different forms and diameters through the rational layout of chain guide rails, hanging brackets, silt removers and silt extraction and collection vehicles.

[0038] 2. Easy to implement

[0039] Make full use of the existing space of inspection wells and drainage pipes for simple renovation, which requires few engineering measures, small investment scale, and is easy to implement and promote.

[0040] 3. Diverse functions

[0041] By integrating the slag bucket, filter screen and mud bucket in the silt remover, and coordinating with the collection of sludge and mud collection trucks, the system can simultaneously remove scum, suspended particles and silt in the sewage in the drainage pipe.

[0042] 4. Flexible operation:

[0043] Through the design of chain guide rails and hanging brackets, the system silt remover can be easily transported from the inspection well to the inside of the drainage pipe, and the silt remover can be transported from the inside of the drainage pipe to the outside of the inspection well during maintenance.

[0044] 5. Significant results

[0045] The system effectively cleans drainage pipes through the skimming effect of the slag bucket on the silt remover, the filtering effect of the filter screen and the shoveling effect of the mud bucket. It is highly targeted, effective and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1This is a front view of the desilting and slag removal device for gravity flow sewage pipes of the present invention.

[0047] Figure 2 This is the front view of the chain guide rail in the system of the present invention.

[0048] Figure 3 This is a front view of a hanging bracket in which a silt remover is nested in the system of the present invention.

[0049] Figure 4 for Figure 3 side view.

[0050] Figures 1 to 4 The numbers in the table mean:

[0051] 1-chain guide rail, 11-support frame, 12-fixed node, 13-frame base, 14-driving sprocket, 15-driven pulley, 16-chain, 17-motor;

[0052] 2-suspension bracket, 21-hook, 22-frame, 23-lifting frame, 24-lateral telescopic wheel;

[0053] 3-silt remover, 31-slag bucket, 32-filter screen, 33-mud bucket;

[0054] 4- silt pumping and collecting truck;

[0055] 5- Ground;

[0056] 6-Test well;

[0057] 7-Sewage;

[0058] 8-Drainage pipes. DETAILED DESCRIPTION

[0059] The invention is further described in detail with reference to the following specific examples and accompanying drawings. The processes, conditions, experimental methods, etc. for implementing the present invention, except for those specifically mentioned below, are common knowledge and common common sense in the art and are not particularly limited by the present invention.

[0060] A dredging and slag removal device for gravity flow sewage pipes is characterized in that a chain guide rail 1 is installed in the inspection well 6 and the drainage pipe 8, the dredging and slag removal device 3 is nested in the suspension bracket 2, the suspension bracket 2 is suspended on the chain guide rail 1, and moves along the chain guide rail 1 in the drainage pipe 8, and is used for in-situ dredging and slag removal of the drainage pipe 8. The sludge collected by the dredging and slag removal device 3 is cleared from the ground outside the inspection well 6 by a silt suction and mud collection vehicle 4.

[0061] The chain guide rail includes a support frame 11, which is equipped with a driving sprocket 14, a driven pulley 15 and a chain 16 that cooperates with it. The wheel surfaces of the driving sprocket 14 and the driven pulley 15 are both located in the same plane as the axis of the drainage pipe 8. The motor 17 is connected to the driving sprocket 14 and is used to drive the driving sprocket to rotate, thereby driving the chain 16 to move. The driven pulley 15 is provided with a wheel groove. The chain groove of the chain 16 engages with the gear teeth of the driving sprocket 15, and the outer side of the chain 16 engages with the wheel groove of the driven pulley 15. The support frame and the side wall of the inspection well are provided with a fixed node 12. The fixed node 12 is the connection point between the support frame 11 and the side wall of the inspection well 6, and the connection method is welding, bonding or expansion screw fixing. The bottom of the support frame 11 is provided with a frame base 13, which is placed at the bottom of the inspection well, and its bottom surface coincides with the bottom surface of the inspection well 6. The driving sprocket 14 is located at the top of the support frame 11, and the driven pulley 15 is located at the bottom of the support frame 11. The tooth pitch of the driving sprocket is 10-15 cm, and the tooth thickness is 7-9 cm; the groove width of the driven pulley is 5-8 cm, and the groove depth is 6-10 cm; the wheel surfaces of the driving sprocket and the driven pulley are both located in the same plane as the axis of the drainage pipe 8.

[0062] There are two ways to install the chain guide rail:

[0063] First, the supporting frame 11, fixed node 12, frame base 13, driving sprocket 14 and driven pulley 15 are all installed in the inspection well 6, so that the chain has a double-strand U-shaped structure;

[0064] Secondly, a portion of the supporting frame 11 and the driving sprocket 14 are installed above the inspection well 6, and the fixed node 12, the frame base 13 and the driven pulley 15 are installed in the inspection well 6, so that the chain has a single-strand mouth structure.

[0065] like Figure 3 、 Figure 4 As shown, the suspended bracket 2 includes a frame body 22 and a hook 21 connected to the frame body, the hook 21 passes through the pin of the chain 16, thereby connecting the frame body 22 to the roller chain 16 of the chain guide rail; the frame body 22 includes an upper frame, a lifting frame 23 arranged at the lower part of the upper frame, and a lower frame that can move up and down along the lifting frame 23, the upper frame is equipped with a slag bucket 31, and the lower frame is equipped with a mud bucket 33, and the heights of the slag bucket 31 and the mud bucket 33 in the drainage pipe 8 can be adjusted by the lifting frame to facilitate skimming of slag and shoveling of silt; a filter screen 32 is installed above the mud bucket of the silt remover 3, and the plane where the filter screen 32 is located is perpendicular to the axis of the drainage pipe; the sludge pumping and mud collecting vehicle 4 includes a mud storage tank, a suction pump and a mud suction pipe, and the mud collecting pipe is placed at the bottom of the downstream inspection well 6 of the sludge crusher.

[0066] Furthermore, the number of hooks is 2 or more to limit the axial displacement of the suspension bracket 2 in the drainage pipe 8; the upper part of the hook is a hook 21, and the lower part is a connecting rod 22 connected to the frame body, and the connecting rod 22 needs to have a certain length so that the suspension bracket 2 can smoothly pass through the right-angle bend when moving with the chain; the suspension bracket 2 includes a double-sided telescopic rod 24 located on both sides of the frame body, and the double-sided telescopic rod 24 is an elastic telescopic rod with a universal wheel at the end, and the telescopic direction is perpendicular to the axis of the drainage pipe 8, which is used to limit the lateral displacement of the suspension bracket in the drainage pipe 8.

[0067] A method for using the device, characterized in that the method comprises:

[0068] Installation phase

[0069] Step 1: Drain the sewage 7 in the drainage pipe 8 in advance so that operators can enter the inspection well 6 for operation;

[0070] Step 2: Install the chain guide rail 1 in the inspection well 6. The chain guide rail 1 includes a driving sprocket 14, a driven pulley 15 and a chain 16 matched therewith;

[0071] Step 3: Fix one or more suspension brackets 2 to the chain 16;

[0072] Step 4: Install the desilting and slag remover 3 on the suspension bracket 2, and adjust the lifting frame 23 on the suspension bracket 2 according to the diameter and water level of the drainage pipe 8, so that the slag bucket 31 and mud bucket 33 of the desilting and slag remover 3 can easily remove the slag and sludge in the drainage pipe 8;

[0073] Step 5: The motor 17 drives the driving sprocket 14 to rotate, and then drives the chain 16, thereby transporting the hanging bracket 2 with the silt remover 3 installed to the inside of the drainage pipe 8;

[0074] Step 6: The silt extraction and collection vehicle 4 is located on the ground 5 outside the inspection well 6;

[0075] Step 7: The drainage pipe 8 is flowing with water normally;

[0076] Operation phase:

[0077] Step 1: The motor 17 drives the driving sprocket 14 to rotate, and then drives the chain 16, thereby transporting the suspension bracket 2 into the drainage pipe 8, and making the movement direction of the suspension bracket 2 in the drainage pipe 8 and the opening direction of the slag bucket 31 and the mud bucket 33 of the silt remover 3 opposite to the flow direction of the sewage in the drainage pipe;

[0078] Step 2: During the relative movement between the silt remover 3 and the sewage 7, the slag bucket 31 can remove the scum on the upper layer of the sewage 7, the filter screen 32 can filter out the suspended particles in the middle layer of the sewage 7, and the mud bucket 33 can remove the silt in the lower layer of the sewage 7;

[0079] Step 3: The motor 17 is continuously rotated to transport the suspension bracket 2 from the drainage pipe 8 to the outside of the inspection well 6. At this time, the scum, suspended particles and sludge collected by the silt remover 3 are transferred to the sludge storage tank of the vehicle by the sludge collection vehicle 4;

[0080] Step 4: Keep the motor 17 rotating continuously to transport the cleaned desilter 3 back into the drainage pipe 8, and then repeat steps 2 and 3;

[0081] Maintenance phase:

[0082] Step 1: When the desilting and slag remover 3 is blocked or damaged, the driving sprocket 14 is rotated in the opposite direction by the motor 17, so that the desilting and slag remover 3 that needs to be repaired is transported to the top of the inspection well 6 along with the chain;

[0083] Step 2: Remove the silt remover 3 from the suspension bracket 2 and inspect and clean the silt remover 3;

[0084] Step 3: Re-fix the silt remover 3 on the suspension bracket 2, and rotate the driving sprocket 14 through the motor 17, so that the repaired silt remover 3 is transported to the drainage pipe 8 along with the chain, and then carry out steps 1 to 4 of the operation stage.

[0085] The actual results of this example show that after the desilter has been running continuously for 12 hours, the scum, suspended particles and silt in the downstream inspection well of the drainage pipe have been effectively cleaned, and the SS concentration of the sewage has been reduced by 73.0% compared with the upstream inspection well.

[0086] The protection content of the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the inventive concept, changes and advantages that can be thought of by those skilled in the art are included in the present invention and are protected by the appended claims.

Claims

1. A method for desilting and removing slag from a gravity flow sewage pipe, characterized in that The method comprises: Installation phase: Step 1: Empty the sewage in the drainage pipe in advance so that operators can enter the inspection well for operation; Step 2: Install a chain guide rail in the inspection well. The chain guide rail includes a driving sprocket, a driven pulley and a chain that cooperates with it; Step 3: Fix one or more hanging brackets to the chain; Step 4: Install the silt remover on the hanging bracket, and adjust the lifting frame on the hanging bracket according to the diameter and water level of the drainage pipe so that the slag bucket and mud bucket of the silt remover can easily remove the slag and mud in the drainage pipe; Step 5: The motor drives the active sprocket to rotate, and then drives the chain, thereby transporting the hanging bracket with the silt remover installed into the drainage pipe; Step 6: The silt extraction and collection truck is located on the ground outside the inspection well; Step 7: The drainage pipe is flowing with water normally; Operation phase: Step 1: The motor drives the active sprocket to rotate, which in turn drives the chain, thereby transporting the suspension bracket into the drainage pipe, and making the movement direction of the suspension bracket in the drainage pipe and the opening direction of the slag bucket and mud bucket of the silt remover opposite to the flow direction of sewage in the drainage pipe; Step 2: When the desilter moves relative to the sewage, the slag bucket can skim off the scum on the upper layer of the sewage, the filter can filter out the suspended particles in the middle layer of the sewage, and the mud bucket can remove the silt in the lower layer of the sewage; Step 3: The suspension bracket is transported from the drainage pipe to the outside of the inspection well by the continuous rotation of the motor. At this time, the scum, suspended particles and sludge collected by the silt remover are transferred to the sludge storage tank of the vehicle by the silt suction and sludge collection vehicle; Step 4: Keep the motor running continuously to transport the cleaned silt remover back into the drainage pipe, and then repeat steps 2 and 3; Maintenance phase: Step 1: When the desilting and slag remover is blocked or damaged, the driving sprocket is rotated in the reverse direction by the motor, so that the desilting and slag remover that needs to be repaired is transported to the top of the inspection well along with the chain; Step 2: Remove the silt remover from the hanging bracket and inspect and clean it; Step 3: Re-fix the silt remover on the hanging bracket and rotate the driving sprocket by the motor, so that the repaired silt remover is transported into the drainage pipe along with the chain, and then carry out steps 1 to 4 of the operation phase; The suspension bracket includes a frame body and a hook connected to the frame body, the hook passes through the pin shaft of the chain, thereby connecting the frame body to the roller chain of the chain guide rail; the frame body includes an upper frame, a lifting frame arranged at the lower part of the upper frame, and a lower frame that can move up and down along the lifting frame, the upper frame is equipped with a slag bucket, and the lower frame is equipped with a mud bucket. The height of the slag bucket and the mud bucket in the drainage pipe can be adjusted by the lifting frame, so that it is convenient to skim off slag and shovel away silt; the suspension bracket is provided with 2 or more hooks to limit the axial displacement of the suspension bracket in the drainage pipe; the suspension bracket includes double-sided telescopic rods located on both sides of the frame body, the double-sided telescopic rods are elastic telescopic rods with universal wheels at the ends, and the telescopic direction is perpendicular to the axis of the drainage pipe, which is used to limit the lateral displacement of the suspension bracket in the drainage pipe.

2. The method according to claim 1, wherein The chain guide rail includes a supporting frame, on which a driving sprocket, a driven pulley and a chain matched therewith are installed. The motor is connected to the driving sprocket to drive the driving sprocket to rotate, thereby driving the chain to move. The driven pulley is provided with a wheel groove, and the chain groove of the chain is engaged with the gear teeth of the driving sprocket. The outer side of the chain engages with the wheel groove of the driven pulley.

3. The method according to claim 2, wherein The driving sprocket is located at the top of the supporting frame, and the driven pulley is located at the bottom of the supporting frame; the tooth pitch of the driving sprocket is 10-15cm, and the tooth thickness is 7-9cm; the wheel groove width of the driven pulley is 5-8cm, and the wheel groove depth is 6-10cm; the wheel surfaces of the driving sprocket and the driven pulley are aligned with the drainage pipe. The axes of the paths lie in the same plane.

4. The method according to claim 1, wherein A filter screen is installed above the mud bucket of the desilting and slag remover, and the plane where the filter screen is located is perpendicular to the axis of the drainage pipe.

5. The method according to claim 1, wherein The silt pumping and mud collecting vehicle comprises a mud storage tank, a suction pump and a mud pumping pipe.

6. The method according to claim 1, wherein The upper portion of the hook is a hook-shaped object, and the lower portion is a connecting rod connected to the frame body. The connecting rod needs to have a certain length so that the hanging bracket can smoothly pass through the right-angle bend when moving with the chain.

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