CN211903031U - Deep directly buried pipeline deposit collecting device - Google Patents

Abstract

The utility model discloses a dark direct-burried pipeline deposit collection device, it includes the T type tee bend that the vertical pipeline in direct-burried pipeline low point department and the tie point of horizontal pipeline set up, and the tee bend of T type lower part mouth of pipe is connected with a header tank that is used for collecting deposit in the direct-burried pipeline, the tee bend of T type upper portion mouth of pipe and the lateral part mouth of pipe respectively with the horizontal pipeline and the vertical pipeline seamless connection of direct-burried pipeline low point department. The sewage collecting box can automatically collect sediments accumulated at a low-point elbow of the pipe network when water flow in the direct-buried pipe network changes direction from low to high, ensures that the sediments accumulated in the direct-buried pipe within the design life cannot influence normal operation, and solves the problem of sewage discharge of the deep direct-buried pipe at low cost.

Description

Deep directly buried pipeline deposit collecting device

Technical Field

The utility model belongs to the technical field of pipeline deposit is collected, concretely relates to dark directly-buried pipeline deposit collection device.

Background

With the deep development and progress of the centralized heat supply technology in recent years in China, heat supply pipelines are more and more applied to heating projects of cities and towns in a direct-buried way. The heat supply pipeline direct burial is laid and is laid with traditional trench, the built on stilts mode such as laying of ground, and its economy and two aspect benefits in society are all very obvious: the direct-buried pipe network saves space compared with an overhead pipeline; the heat transfer speed in the soil is slow, and the heat loss is low; the construction period is short, and the occupied area is small; is beneficial to the appearance and appearance of the city and improves the environmental quality of the city.

However, as urbanization is accelerated, modification projects and extension projects are increased day by day, many projects cannot be matched with planning, many situations of crossing with existing roads, railways, other professional buried pipelines and existing structures occur, pipelines need to be locally buried deeper (the height of the top of the pipeline is reduced) to avoid bypassing, so that sediments are easily accumulated at local low points to block the pipelines (as shown in fig. 4), various obstacles can be encountered during construction according to the traditional concept of manufacturing a sewage well, and particularly, the method is prominent during construction in towns with dense personnel. The design has higher requirements, the technology is scientific and reasonable, and the requirements of construction convenience and reasonable engineering cost are met.

When a plurality of directly buried pipelines need to pass through the existing highway, railway, other professional buried pipelines and existing structures, the sewage well cannot be normally arranged due to insufficient field operation area and complex environment of peripheral pipelines. Or because the cost is too high, the owner is reluctant to construct the sewage well, so that the later pipeline is partially low and the water flow is not smooth or even blocked.

And a pollution discharge facility is suitable to be arranged at a low point of the pipeline according to the design specification of urban heat supply pipe network CJJ 34-2010. The traditional treatment mode is to arrange a sewage well (as shown in figure 1), branch pipelines need to be arranged at local low points, sand grains, colloid organic aggregates, corrosion residues on the inner wall of the pipeline, water scales and the like in the pipeline need to be cleaned regularly during operation so as to avoid blocking the pipeline, and the cleaning mode is to open a drain valve in figure 1 to discharge the sediments in the pipeline into a water collecting pit in the sewage well and then discharge the sediments into a municipal drainage pipe network nearby or discharge the sediments to the ground by using a submersible sewage pump. The sewage drainage well is generally built according to a national standard atlas (13SR425 'outdoor heat distribution pipeline inspection well' page 79), and a special-shaped structure can also be specifically designed by a design unit according to the field situation. When the directly buried pipeline needs to be locally lowered after passing through other structures of highway and railway culvert, the sewage drainage well must be simultaneously deepened to be below the lowest elevation of a pipe network, and the well depth is increased, so that the following defects can be caused:

1. the excavation area of a construction site is increased, the working face is enlarged, and the influence on municipal traffic or other pipelines, pipelines and building structure foundations is increased.

2. The construction cost of the sewage well is greatly improved.

3. The depth is increased to be closer to or reach the underground water layer, and simultaneously, the waterproof requirement on the sewage well is increased because the area of the well wall of the pipe is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a dark directly-buried pipeline deposit collection device through setting up the dirty pipe box of collection at local low point, but rivers gather the deposit that causes pipe blockage easily at sand grain, the organic collection thing of colloid, pipeline corrosion residue, incrustation scale etc. of pipe network low point elbow department when changing direction by low to high in the automatic collection directly-buried pipe network, need not to excavate the blowpit alone.

The utility model discloses a dark direct-burried pipeline deposit collection device, it includes the T type tee bend that sets up at the vertical pipeline of direct-burried pipeline low point department and the tie point (elbow department) of horizontal pipeline, and the tee portion mouth of pipe of T type lower part is connected with a header tank that is used for collecting deposit in the direct-burried pipeline, the tee portion mouth of pipe of upper portion and the lateral part mouth of pipe respectively with the horizontal pipeline and the vertical pipeline seamless connection of direct-burried pipeline low point department.

Further, the volume of the header tank is larger (e.g., slightly larger) than the volume of the discharged sewage accumulated over the design life of the buried pipeline.

Furthermore, the sewage collecting box is cylindrical, the side surface of the sewage collecting box is provided with a section of prefabricated direct-buried heat insulation pipeline (for example, the prefabricated direct-buried heat insulation pipeline with a relatively large pipe diameter can be selected) which is made of the same material as that of the direct-buried pipe network, the bottom surface of the sewage collecting box is provided with a first direct-buried blind flange for plugging a pipe orifice at the bottom of the sewage collecting box, and the top surface of the sewage collecting box is provided with a second direct-buried blind flange for plugging a pipe orifice at the top of the sewage collecting box, wherein the middle opening of. The joint of the side surface, the bottom surface and the top surface of the sewage collecting box needs to be subjected to antiseptic treatment.

Furthermore, the side surface (periphery) of the sewage collecting box is a high-density polyethylene outer-protection rigid polyurethane foam prefabricated direct-buried heat-insulation pipe, and the whole sewage collecting box is subjected to heat insulation treatment by adopting high-density polyethylene outer-protection polyurethane foam.

Furthermore, the T-shaped tee joint is a prefabricated direct-buried heat-insulation tee joint, and the wall thickness of the T-shaped tee joint is not smaller than that of a horizontal pipeline and a vertical pipeline connected with the T-shaped tee joint.

Further, the side pipe orifice of the T-shaped tee is perpendicular to the straight line where the lower pipe orifice and the upper pipe orifice are located.

Furthermore, the periphery and the bottom of the sewage collecting box are provided with buffering cushions, the buffering cushions are made of flexible materials such as polyether foam, the local deepening of the sewage collecting box is embedded into the soil, the damage of local welded junctions on the sewage collecting box caused by the displacement of the pipeline after expansion caused by heat and contraction caused by cold is avoided, and the buffering cushions are arranged on the periphery and the bottom of the sewage collecting box.

And the welding opening at the joint of the top surface of the sewage collecting box and the lower pipe orifice of the T-shaped tee joint is required to be subjected to 100% radiographic inspection, and the qualified standard is grade II.

The utility model discloses a dark directly-buried pipeline deposit collection device directly buries prefabricated heat preservation elbow of direct-burried in with traditional mode (as shown in fig. 1) and changes prefabricated directly-burried heat preservation T type tee bend into, then link to each other T type tee bend and collection dirt pipe case, but automatic collection rivers gather at the grains of sand of pipe network low point elbow department when changing direction by low to high, the organic collection thing of colloid, pipeline inner wall corrosion residue, incrustation scale etc. cause the deposit of pipe blockage easily, the collection dirt pipe case in T type tee bend department is collected to deposit in the pipe network when will moving, guarantee that the deposit of directly-burried pipeline in the pipeline can not influence pipe network normal operating in the design age. The volume of the sewage collecting box is calculated according to the accumulated discharge capacity of the design life of the directly buried pipeline, the size of the box body is determined according to the actual condition of a construction site, for example, other parallel pipelines are arranged on the periphery of the box body, the cross section of the pipe box can be reduced, and the length of the pipe box can be increased. The utility model discloses a traditional construction difficult problem has been solved to device simple, economy, efficient, has avoided the hidden danger of operation.

The utility model discloses a dark directly buried pipeline deposit collection device compares with traditional dark directly buried blowoff well, need not to build alone the deep buried piping well again, has saved building civil engineering, the labour cost of blowoff well, reduces the pipe network cost. Meanwhile, the hidden danger that the interior pipe fittings of the sewage well in the traditional form are corroded or even abandoned due to rainwater immersion, domestic sewage injection, well wall collapse and the like is avoided. The device is simple and convenient to construct, excellent in practical performance and remarkable in economic effect.

Drawings

Fig. 1 is a schematic view of a conventional method for manufacturing a sewage drainage well by a local deep-buried bypass.

Fig. 2 is a using state diagram of the deep directly buried pipeline deposit collecting device of the present invention.

Fig. 3 is a schematic structural diagram of the deep buried pipeline deposit collecting device of the present invention.

Fig. 4 is a schematic diagram of the accumulation of sediments in the deep directly buried pipeline.

Fig. 5 is a schematic view of the deposit collection of the deep buried pipeline deposit collection device of the present invention.

Reference numerals:

the sewage collecting box comprises a sewage collecting box 1, a T-shaped tee joint 2, a first directly-buried blind flange 3, a second directly-buried blind flange 4, a welded junction 5, a lower pipe orifice 6, a side pipe orifice 7, an upper pipe orifice 8, a horizontal pipeline 9, a vertical pipeline 10, a bypass culvert 11, a buffer pad 12 and a directly-buried pipeline 13.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 2, 3 and 5, the utility model discloses a dark buried pipeline deposit collection device, it includes T type tee bend 2 that vertical pipeline 10 in buried pipeline 13 low point department and the tie point (elbow department) setting of horizontal pipeline 9, the lower part mouth of pipe 6 of T type tee bend 2 is connected with a header 1 that is used for collecting the deposit in the buried pipeline, the upper portion mouth of pipe 8 and the lateral part mouth of pipe 7 of T type tee bend 2 respectively with the horizontal pipeline 9 and the vertical pipeline 10 seamless connection of buried pipeline 13 low point department. In the embodiment shown in fig. 2, the horizontal conduits 9 pass through a bypass culvert 11.

The volume of the header tank 1 may be slightly larger than the volume of the discharged sewage accumulated over the design life of the buried pipeline.

In one embodiment, the header tank 1 is cylindrical, and has a side surface (curved surface) that is a section of pipe (e.g., a prefabricated direct-buried heat-insulating pipe with a relatively large pipe diameter) that is made of the same material as the direct-buried pipe network and has a larger diameter than the direct-buried pipe, a first direct-buried blind flange 3 that is used for plugging a pipe orifice at the bottom of the header tank and a second direct-buried blind flange 4 that is used for plugging a pipe orifice at the top of the header tank and has a middle opening that is seamlessly connected to a lower pipe orifice of the T-junction. The joint between the side surface and the bottom surface and the top surface of the header tank 1 is preferably subjected to an anticorrosive treatment.

The periphery of the sewage collecting box 1 is subjected to heat preservation treatment by adopting high-density polyethylene external-protection polyurethane foam.

The T-shaped tee joint 2 is a prefabricated direct-buried heat-insulation tee joint, and the wall thickness of the T-shaped tee joint is not less than that of a horizontal pipeline 9 and a vertical pipeline 10 connected with the T-shaped tee joint.

The side nozzle 7 of the T-shaped tee 2 is perpendicular to the straight line of the lower nozzle 6 and the upper nozzle 8.

The periphery and the bottom of the sewage collecting box 1 are provided with buffer pads 12, the buffer pads 12 are made of flexible materials such as polyether foam, and the buffer pads 12 are preferably arranged on the periphery and the bottom of the sewage collecting box because the local part of the sewage collecting box is deepened and buried in the soil, and the local welded junction damage to the sewage collecting box caused by the displacement after the pipeline expands with heat and contracts with cold is avoided.

The top surface of the sewage collecting box and a welded junction 5 at the joint of the first pipe orifice of the T-shaped tee joint are required to be subjected to 100% radiographic inspection, and the qualified standard is level II.

The utility model discloses a dark directly buried pipeline deposit collection device's manufacture process does:

the prefabricated direct-buried heat-insulation pipeline of the sewage collecting box is made of the same material as a direct-buried hot water pipe network, the prefabricated direct-buried heat-insulation pipeline with a relatively large pipe diameter and the direct-buried blind flange are taken and manufactured on site, and the prefabricated direct-buried heat-insulation pipeline and other pipelines can be purchased in the same batch and transported to the site to reduce manpower and financial resources. The construction can be carried out synchronously, and the pressure test of the sewage collecting box can be synchronous with the main pipeline. The directly buried pipeline transported to the site is cut on site, and can be made with different pipe diameters on the premise of ensuring the volume, so that the waste of residual materials caused by small using amount is avoided. And after the cutting, the bottom end is blocked by a first directly-buried blind flange, the top end is blocked by a second directly-buried blind flange which is the same as the first directly-buried blind flange, a hole is formed in the second directly-buried blind flange and then the second directly-buried blind flange is welded with a T-shaped tee joint, and the welded junction is subjected to anti-corrosion treatment. The heat preservation of the sewage collecting box is integrally prefabricated directly buried by high-density polyethylene external-protection rigid polyurethane foam plastic.

And (3) performing 100% radiographic inspection detection on the welded junctions at the joints of the sewage collecting box and the T-shaped tee, wherein the qualified standard is II grade. The T-shaped tee is a directly-buried heat-insulating tee, and the wall thickness of the T-shaped tee is ensured not to be smaller than that of the connected straight pipe section. Because the pipe case buries in the soil, should avoid the displacement volume after the pipeline expends with heat and contracts with cold to cause local weld bond destruction to the pipe case, should set up the blotter in the both sides and the bottom of pipe case, the blotter adopts flexible material such as polyether foam.

Claims (7)

1. The deep directly-buried pipeline sediment collecting device is characterized by comprising a T-shaped tee joint arranged at a connecting point of a vertical pipeline and a horizontal pipeline at the low point of the directly-buried pipeline, wherein a lower pipe orifice of the T-shaped tee joint is connected with a sewage collecting box used for collecting sediments in the directly-buried pipeline, and an upper pipe orifice and a side pipe orifice of the T-shaped tee joint are respectively in seamless connection with the horizontal pipeline and the vertical pipeline at the low point of the directly-buried pipeline.

2. The deep buried pipe sediment collection apparatus of claim 1 wherein the volume of the header tank is greater than the volume of the discharge capacity accumulated over the design life of the buried pipe.

3. The deep directly buried pipeline sediment collecting device of claim 1, wherein the sewage collecting box is cylindrical, the curved surface of the sewage collecting box is a section of pipeline which is made of the same material as a directly buried pipeline network and has a diameter larger than that of the directly buried pipeline, the bottom surface of the sewage collecting box is a first directly buried blind flange used for blocking a bottom pipe orifice of the sewage collecting box, the top surface of the sewage collecting box is a second directly buried blind flange used for blocking a top pipe orifice of the sewage collecting box, and a middle opening of the second directly buried blind flange is in seamless connection with a lower pipe orifice of the T-shaped.

4. The deep directly-buried pipeline deposit collecting device according to claim 1, wherein the periphery of the sewage collecting box is provided with high-density polyethylene outer-protection polyurethane foam heat preservation treatment.

5. The deep directly buried pipeline sediment collecting device of claim 1, wherein the T-shaped tee is a prefabricated directly buried heat preservation tee and the wall thickness of the T-shaped tee is not less than that of the horizontal pipeline and the vertical pipeline connected with the T-shaped tee.

6. The deep buried pipeline sediment collecting device of claim 1, wherein the second nozzle of the T-shaped tee is perpendicular to the straight line of the first nozzle and the third nozzle.

7. The deep buried pipeline sediment trap of claim 1 wherein the outer periphery and bottom of the header tank are provided with cushions.

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