CN220266778U - Non-excavation short pipe of drainage pipeline - Google Patents

Abstract

The utility model discloses a non-excavation short pipe of a drainage pipeline, which relates to the field of drainage pipeline construction and comprises an extrusion crushing original pipe and a new pipe which is pulled back, wherein the new pipe comprises a new pipe structure, the new pipe structure comprises a new pipe main body, a thickening layer is arranged on the outer side of the new pipe main body, a sequential bevel angle is arranged on the outer side of the thickening layer in a protruding mode, a groove is further formed in one side of the sequential bevel angle, located on the outer side of the thickening layer, and hard filling is carried out in the groove. The utility model realizes that the thickening layer for thickening and reinforcing is additionally arranged on the outer side of the new pipe main body, and the edge-smoothing bevel angle capable of reducing the friction force with the original pipe is additionally arranged on the outer side of the thickening layer, so that the contact area between the edge-smoothing bevel angle and the original pipe is small, the friction force is small, the dragging direction is the same as the inclination direction of the edge-smoothing bevel angle, the resistance is reduced to a certain extent, the new pipe is more smoothly dragged back, the damage degree after being dragged back is small, and the service life is prolonged.

Description

Non-excavation short pipe of drainage pipeline

Technical Field

The utility model relates to the field of drainage pipeline construction, in particular to a non-excavation short pipe of a drainage pipeline.

Background

The drainage pipeline refers to a system consisting of a pipeline for collecting and discharging sewage, wastewater and rainwater and auxiliary facilities thereof, and comprises a main pipe, a branch pipe and a pipeline leading to a treatment plant, wherein the pipeline is built on a street or elsewhere, and is used as drainage pipeline statistics whenever the pipeline plays a role in drainage, the drainage pipeline is generally buried in the ground deeply, when the drainage pipeline is locally damaged, the drainage pipeline needs to be maintained, the existing maintenance modes are two, namely, the pipeline is excavated, the pipeline is maintained from the outside, the pipeline is not excavated, and the damaged place is repaired from the end part of the pipeline.

The non-excavation repair comprises a plurality of construction methods, such as balloon point repair, point UV in-situ curing repair, stainless steel foaming cylinder, stainless steel double expansion ring, stainless steel sleeve, pipe cracking process and the like, which are common in local non-excavation repair; the conventional method for repairing the whole section comprises an inserting method, a water turning in-situ curing method, a UV-CIPP in-situ curing method, a folding lining method, a machine-made spiral winding method and the like, and each method is practical, but has respective advantages and defects, wherein a pipe cracking process is a non-excavation pipe replacement technology which takes an old pipe to be replaced as a guide, adopts a special tool or equipment to burst the old pipe and simultaneously pulls or jacks a new pipe into the original pipe, the existing inspection well is used as a working well, excavation backfill is not needed, and construction is suitable for urban construction without large-area occupation, noise-free construction, interference-free and the like in the construction process, but the construction mode is easy to cause friction damage of the new pipe when the new pipe is pulled due to the fact that the broken pipe and the new pipe are pulled, and therefore a non-excavation short pipe of the drainage pipe is needed.

Disclosure of Invention

Based on the above, the utility model aims to provide a non-excavation short pipe of a drainage pipeline, so as to solve the technical problem that when a new pipeline is pulled in a pipe cracking process, the broken pipeline and the new pipeline generate larger friction when being pulled, and the friction and the damage of the new pipeline are easy to cause when the new pipeline is pulled.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a drainage pipe non-excavation nozzle stub, includes the broken former pipe of extrusion and drags the new pipe back, it includes new tubular construction to drag the new pipe back, and new tubular construction includes new pipe main part, the outside of new pipe main part is provided with the thickening layer, and the outside protrusion on thickening layer is provided with the bevel that just inclines, the outside that one side of bevel is located the thickening layer is still seted up flutedly, and the inside packing of recess has the stereoplasm to fill, the front end of new pipe main part is connected with the front end, and the rear end of new pipe main part is connected with the rear end.

Preferably, the cross section of the sequential side bevel angle is of a triangle structure, the number of sequential side bevel angles is multiple, multiple groups of sequential side bevel angles are equidistantly distributed on the outer side of the thickening layer, multiple groups of sequential side bevel angles are the same in inclination angle, and multiple groups of sequential side bevel angles are the same in drawing-back direction of the new pipe main body.

Preferably, the number of the grooves is multiple, the multiple groups of the grooves are equidistantly distributed on the outer side of the thickening layer, the number of the hard filling is multiple, and the hard filling and the thickening layer are integrally formed.

Preferably, the front joint and the rear joint are fixedly connected with the new pipe main body.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, through the arrangement of the novel pipe main body, the thickening layer, the sequential bevel angle, the groove, the hard filling, the front joint and the rear joint, the thickening layer for thickening and reinforcing is additionally arranged on the outer side of the novel pipe main body, the sequential bevel angle capable of reducing friction force with an original pipe is additionally arranged on the outer side of the thickening layer, the contact area between the sequential bevel angle and the original pipe is small, the friction force is small, the dragging direction is the same as the inclination direction of the sequential bevel angle, the resistance is reduced to a certain extent, the process of dragging the novel pipe back is smoother, the damage degree after dragging the novel pipe back is small, and the service life is prolonged;

2. the utility model repairs the drainage pipeline by means of short pipe replacement, does not need to dig grooves, does not generate earthwork, does not need to dismantle and discard old pipelines, does not change the original drainage gradient after the expansion pipe is replaced, utilizes the existing inspection well as a working well, saves investment, reduces resource waste, does not generate gaps around the pipeline after construction is completed, does not need grouting filling, and has the advantages of good material property, high hardness, corrosion resistance, good ageing resistance, smooth inner wall and difficult blockage.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a cross-sectional view of the present utility model.

In the figure: 1. a new pipe body; 2. thickening layers; 3. c, edge smoothing bevel angles; 4. a groove; 5. hard filling; 6. a front joint; 7. and a rear joint.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.

Referring to fig. 1 and 2, a non-excavation short pipe of a drainage pipeline comprises an extrusion crushing original pipe and a new pipe which is pulled back, wherein the new pipe comprises a new pipe structure, the new pipe structure comprises a new pipe main body 1, a thickening layer 2 is arranged on the outer side of the new pipe main body 1, a clockwise bevel angle 3 is arranged on the outer side of the thickening layer 2 in a protruding mode, a groove 4 is further formed in the outer side of the thickening layer 2 on one side of the clockwise bevel angle 3, hard filling 5 is filled in the groove 4, a front joint 6 is connected with the front end of the new pipe main body 1, a rear joint 7 is connected with the rear end of the new pipe main body 1, and the extrusion crushing original pipe and the new pipe which is pulled back comprise the following steps:

step one: making early work before well logging, including drainage pipeline investigation, inspection well cleaning and the like;

step two: after the water is put into the inspection well, a drain pipe plug is arranged in the well, after the two ends of the drain pipe are plugged, the water is pumped, and then the original pipeline is washed and dredged;

step three: installing a traction pipe, and penetrating the traction pipe from one end of the original drain pipe to the other end of the original drain pipe;

step four: connecting the traction pipe and a new pipe, installing a crushing cutter head at the end part of the new pipe, and then dragging the new pipe back, wherein the crushing cutter head crushes the original pipe, and the new pipe moves behind the traction pipe;

step five: mounting crushing cutter head receiving equipment in the inspection well, and disassembling the crushing cutter head;

step six: the pulling tube is disassembled, then the ends of the new tube are connected, and a plurality of replacement short tubes form a long tube.

According to the utility model, through the arrangement of the novel pipe main body, the thickening layer, the sequential bevel angle, the groove, the hard filling, the front joint and the rear joint, the thickening layer for thickening and reinforcing is additionally arranged on the outer side of the novel pipe main body, the sequential bevel angle capable of reducing friction force with an original pipe is additionally arranged on the outer side of the thickening layer, the contact area between the sequential bevel angle and the original pipe is small, the friction force is small, the dragging direction is the same as the inclination direction of the sequential bevel angle, the resistance is reduced to a certain extent, the process of dragging the novel pipe back is smoother, the damage degree after dragging the novel pipe back is small, and the service life is prolonged.

The cross section of the sequential side bevel angle 3 is of a triangular structure, the number of sequential side bevel angles 3 is multiple, multiple groups of sequential side bevel angles 3 are equidistantly distributed on the outer side of the thickening layer 2, the inclination angles of the multiple groups of sequential side bevel angles 3 are the same, and the inclination angles of the multiple groups of sequential side bevel angles 3 are the same as the drawing-back direction of the new pipe main body 1.

In the utility model, the contact area of the sharp corner part of the feathering bevel angle 3 and the original pipeline is small, compared with the existing cylindrical pipeline, the contact area is small, the friction force of the back dragging is reduced, so the force required by the back dragging is reduced, and compared with the existing common PE pipeline, the strength of the feathering bevel angle, the groove and the hard filling are higher, the wear resistance is better, the compression resistance is better, and the service life is longer.

The quantity of the grooves 4 is multiple groups, the grooves 4 of the multiple groups are equidistantly distributed on the outer side of the thickening layer 2, the quantity of the hard filling 5 is multiple groups, and the hard filling 5 and the thickening layer 2 are integrally formed.

In the utility model, the hard filling 5 can be made of metal, the groove 4 and the thickening layer 2 after filling are integrally formed, the thickening layer 2 with good connectivity can also be made of metal, and the thickening layer 2 can be fused with the hard filling 5 better.

The front joint 6 and the rear joint 7 are fixedly connected with the new pipe main body 1.

In the utility model, the inner parts of the front joint 6 and the rear joint 7 are provided with the clamping grooves and the clamping blocks in advance, so that the front joint 6 is conveniently connected with the back towing head when being towed back by utilizing the corresponding clamping grooves and clamping blocks to connect with the joints, and the back towing is convenient.

The pre-working before the well is done in the first step comprises the following steps:

s1: the drainage pipeline is investigated, technicians with abundant experience are to be dispatched to conduct on-site pipeline investigation, all manhole covers close to pipelines to be modified are opened one by one to be checked and recorded, and if necessary, a professional pipeline instrument can be adopted to detect the position, trend and depth of the adjacent pipelines and record the positions, the trends and the depths;

s2: inspection well investigation, detecting and recording the position of the inspection well, selecting the inspection well with the best construction, detecting the gas before the inspection well is run in order to prevent toxic gas, opening a well cover at the upstream and downstream of a pipeline for ventilation, and detecting the gas in the well by using a gas detection instrument to ensure that the inspection well can be run in the rear of the toxic gas;

s3: cleaning the inspection well, pumping water and dredging the inside of the inspection well, and improving the construction environment in the inspection well.

In the utility model, pipeline investigation is an important preliminary preparation work for ensuring that other pipelines are not damaged and that engineering is smoothly carried out, and toxic gases in a pipeline can be hydrogen sulfide, methane, carbon monoxide and the like when the pipeline gas is detected, so that the pipeline investigation needs to be carried out firstly to avoid being damaged by the toxic gases, and the condition that no toxic gas can enter a well after the pipeline investigation is carried out is ensured.

The second step comprises:

s1: the pipeline is required to be subjected to precipitation before construction operation, an air bag blocking mode is adopted, accessories of an inflation device of the circular pipeline blocking device of the engineering are combined before blocking, air leakage detection is carried out, an inflation pump is used for inflating the air bag, the air pressure can not exceed 0.15mpa, and whether the air bag leaks air is detected;

s2: opening the well cover, slowly placing the air bag from the pipeline opening to a required position, then inflating the air bag into the pipeline plugging air bag to a pressure of about 0.25mpa, and checking whether air leakage occurs after the air bag is inflated;

s3: then the sewage in the original pipeline is pumped, a power supply is connected, a sewage pump is started, the pumping condition is observed until the pumping is stable and normal, the sewage is guided into a downstream pipeline or other adjacent independent drainage system pipelines, and the sewage is discharged in a concentrated way;

s4: after diluting the silt impurity in the pipeline, flow to the pipeline downstream along the high-pressure water jet direction, the garbage, silt and the like deposited in the inspection well are dug by constructors in the well, the garbage and the silt are dug and transported to the outside of the garbage transport vehicle for transportation and digestion, and the pipeline is cleaned and dredged and simultaneously washes the inspection well wall under high pressure, so that the effects of cleaning and deodorizing the well wall are achieved.

In the utility model, the pipeline plugging air bag is prevented from being placed at the joint of the vertical pipe fitting, and the following reasons are: (1) the inner wall of the position is provided with a seam, which affects the tightness of water shutoff; (2) so as to prevent the pipeline plugging device from expanding to one side, the air pressure cannot be increased, and if the pipeline plugging device is continuously inflated inwards at the moment, the pipeline plugging device can be broken; (3) for municipal drain pipes, sand cleaning is required, the inner wall is smooth, burrs are not allowed, water blocking tightness is not influenced, even the air bags are punctured, pipeline blocking air bags with various specifications are required to be used in corresponding pipelines, the air bags cannot be replaced by small air bags or large air bags cannot be replaced by large air bags, in order to prevent the air bags from being separated from the rubber pipes, iron wires are used for fastening or other fastening at the interfaces of the air bags and the rubber pipes, when the air bags are inflated by the inflation pump, the air quantity of the inflation pump is required to be reduced, a large amount of inflation is not required to be continued, so that the air bags are prevented from being exploded, accidents are caused, when engineering operation is carried out, the pressure value of the air bags is required to be concerned at any time, if the pressure value of the air bags is very slow to be reduced, the operation is not required to be stopped, the air bags are continuously inflated by the inflation pump until standard air pressure is reached, and after inflation is completed, or a part is leaked.

Step three, installing the traction tube comprises: the traction pipe is jacked into the lower pipe well from the mechanical installation working well along the bottom of the existing cement pipeline by using a hydraulic press, and the threaded connection of the traction pipe and the pull rod is required to be tightened in place, so that the phenomenon of tripping and sliding buckling is avoided.

The movable back of the hydraulic machine is formed by vertically placing 4-6 sleepers with the length of 0.8 meter and the section of 200 multiplied by 200mm, the sleepers are adjusted to enable the vertical surfaces to be approximately on the same plane, the sleepers are closely attached to a sleeper supporting wood plate and a steel plate (a stress surface), the verticality is noted, a replacement machine is slowly placed into a well by adopting a chain block, the direction is noted, a traction rod is jacked into a lower pipe well by a hydraulic machine from a mechanical installation working well along the bottom of an existing cement pipeline, and the placement direction of the traction rod jacked into the traction rod by the traction rod machine is inconsistent with that of pipe breakage.

Step four, connecting the traction pipe and a new pipe, installing a crushing cutter head at the end part of the new pipe, and then dragging the new pipe back, wherein the crushing cutter head crushes the original pipe, and the new pipe moves behind the traction pipe and comprises the following steps: the original old pipeline is expanded and crushed by utilizing the mute hydraulic press to squeeze the old pipeline into the soil layer around the pipeline body, meanwhile, the new pipeline is synchronously conveyed into the new pore-forming pipeline section by section through the oil jack, when the new pipeline is pulled back, the advancing direction is the same as the direction of the edge-following bevel angle 3 on the outer side of the thickening layer 2, the edge-following bevel angle 3 contacts with the original pipeline which is expanded and cracked in the advancing process, the contact area between the edge-following bevel angle 3 and the original pipeline is small, the friction force is small, the whole new pipeline main body 1 is not easy to be damaged due to friction, and the crushing tool bits with different sizes are selected according to the inner diameter of the original pipeline.

In the utility model, different back dragging forces are adopted according to different pipe diameters, for example, the pipe diameter is 50-150mm, and the back dragging force is 200KN; the pipe diameter is 50-300mm, and the back drag force is 400KN; the pipe diameter is 60-450mm, and the back drag force is 770KN; the pipe diameter is 150-600mm, and the back drag force is 1250KN; the pipe diameter is 300-1000mm, and the back drag force is 2500KN.

Step five, installing crushing cutter head receiving equipment in the inspection well, and disassembling the crushing cutter head comprises the following steps: when the new pipe is pulled back to the inspection well, the new pipe is guaranteed to enter the inspection well for 1-3 cm, the hydraulic press is slowly lifted out of the inspection well by adopting a chain block after the dismantling condition is met, and then the crushing cutter head, the traction pipe and the back support facility are disassembled in sequence.

In the utility model, the original pipeline adopting the expansion pipe is generally asbestos cement pipe or ceramic pipe or concrete pipe or brick pipe, so that the applicable crushing cutter head is generally a hydraulic cutter with an expansion head or a pneumatic cutter with an expansion head.

Step six, connecting the ends of the new pipe, wherein the plurality of replacement short pipes form a long pipe, comprising: the rear joint 7 in the first group of new pipe main bodies 1 and the front joint 6 in the second group of new pipe main bodies 1 are connected by adopting a socket, the joint part is a good socket groove which is processed in advance, and the leakage problem can not occur after the strong joint is squeezed.

The utility model has the overall advantages that the non-excavation pipeline replacement method has little negative influence on construction, little construction space is occupied, little influence on the ground, traffic, environment, surrounding underground pipelines and the like is realized, and most importantly, the original pipeline with small pipe diameter can be replaced by a pipeline with larger pipe diameter and meeting the supply requirement after replacement, and the construction can be realized in the original pipe diameter without re-perforating. Therefore, the application of the field of heat, water supply and drainage pipeline replacement and repair of the trenchless pipeline replacement technology is imperative.

What is not described in detail in this specification is prior art known to those skilled in the art.

The terms "center," "longitudinal," "transverse," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for descriptive simplicity and convenience only and not as an indication or implying that the apparatus or element being referred to must have a particular orientation, be constructed and operated for a particular orientation, based on the orientation or positional relationship illustrated in the drawings, and thus should not be construed as limiting the scope of the present utility model.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (4)

1. The utility model provides a drainage pipe non-excavation nozzle stub, its characterized in that, including the broken former pipe of extrusion and back drag new pipe, back drag new pipe and include new pipe structure, and new pipe structure includes new pipe main part (1), the outside of new pipe main part (1) is provided with thickening layer (2), and the outside of thickening layer (2) is protruding to be provided with along limit oblique angle (3), one side along limit oblique angle (3) is located the outside of thickening layer (2) and still sets up fluted (4), and the inside packing of fluted (4) has stereoplasm to pack (5), the front end of new pipe main part (1) is connected with front joint (6), and the rear end of new pipe main part (1) is connected with rear joint (7).

2. A drain pipe trenchless spool as defined in claim 1, wherein: the cross section of the sequential side bevel angle (3) is of a triangular structure, the sequential side bevel angles (3) are in a plurality of groups, the sequential side bevel angles (3) are equidistantly distributed on the outer side of the thickening layer (2), the sequential side bevel angles (3) are the same in inclination angle, and the sequential side bevel angles (3) are the same in inclination angle and the back dragging direction of the new pipe main body (1).

3. A drain pipe trenchless spool as defined in claim 1, wherein: the number of the grooves (4) is multiple, the grooves (4) are equidistantly distributed on the outer side of the thickening layer (2), the number of the hard fillers (5) is multiple, and the hard fillers (5) and the thickening layer (2) are integrally formed.

4. A drain pipe trenchless spool as defined in claim 1, wherein: the front joint (6) and the rear joint (7) are fixedly connected with the new pipe main body (1).