CN111473163B - Heat supply pipeline connecting structure and construction method thereof - Google Patents
Heat supply pipeline connecting structure and construction method thereof Download PDFInfo
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- CN111473163B CN111473163B CN202010302639.0A CN202010302639A CN111473163B CN 111473163 B CN111473163 B CN 111473163B CN 202010302639 A CN202010302639 A CN 202010302639A CN 111473163 B CN111473163 B CN 111473163B
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- pipeline
- connecting ring
- groove
- pipelines
- sliding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/20—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction
Abstract
The invention discloses a heat supply pipeline connecting structure and a construction method thereof, and relates to the technical field of heat supply pipeline laying. A construction method of a heat supply pipeline connecting structure comprises the steps of measuring and paying off, groove excavation, cleaning, tamping, primary backfilling, hanging and placing a pipeline, welding a connecting piece, welding the pipeline, taking down a support rod, testing the pipeline, sleeving a protective sleeve and backfilling earthwork. The invention has the beneficial effect of preventing the welding seam at the pipeline joint from cracking.
Description
Technical Field
The invention relates to the technical field of heat supply pipeline laying, in particular to a heat supply pipeline connecting structure and a construction method thereof.
Background
At present, the pipelines of industrial and domestic heating equipment used in urban central heating projects and large and medium-sized enterprises are mostly buried underground, namely, the so-called direct-buried heating pipelines. The existing heat supply pipeline connection is mostly rigid connection, when the pipeline is vibrated, the pipeline can be damaged and is difficult to automatically recover, so that the connection is necessary to be designed and improved to prevent the heat supply pipeline from being permanently damaged by the earthquake.
Not solve above-mentioned technical problem, utility model that bulletin number is CN207049518U discloses an antidetonation heat preservation heat supply pipeline, including outer tube, heat preservation, bracing piece, connecting piece, inner tube and runner, the outer tube overlaps in the inboard of inner tube, the inner wall of outer tube and the outer wall of inner tube are connected through the bracing piece, and this utility model discloses a divide into left link and right link with the connecting piece to left link and right link accessible sleeve and the slip section of thick bamboo slide by a small margin relatively, when vibrations appear, because the slip of sleeve and slip section of thick bamboo can offset the harm brought for heat supply pipeline by vibrations to improve heat supply pipeline's life, reduce cost.
However, the connecting member in the above prior art can only be used for buffering and damping between two adjacent heat supply pipelines, and cannot protect the heat supply pipeline having a cracking tendency or having cracks, so as to prevent the cracks from expanding.
Disclosure of Invention
In view of the defects in the prior art, one of the objectives of the present invention is to provide a heat supply pipeline connection structure, which has the beneficial effect of preventing the cracks at the welding seams of the pipeline connection.
One of the above objects of the present invention is achieved by the following technical solutions:
the utility model provides a heat supply pipeline connection structure, includes a plurality of pipelines that end to end connects, locates the connecting piece between two adjacent pipelines and locates prefabricated support below the pipeline both ends, the connecting piece includes first go-between, second go-between, locates at least three elastic component and two at least vaulting poles between first go-between and the second go-between, first go-between and second go-between are connected respectively in adjacent on the pipeline, the connecting piece is under the user state, and the elastic component has the trend of drawing first go-between and the piece go-between of second close.
By adopting the technical scheme, when two adjacent pipelines are connected together, the first connecting ring and the second connecting ring are respectively connected to the two pipelines, and under the action of the elastic piece, the first connecting ring and the second connecting ring have the tendency of approaching each other, so that the welding position between the two pipelines is not easy to crack; the stay bar is used for separating the first connecting ring and the second connecting ring before the positions of the two connecting rings are fixed, so that the elastic piece is in a stretching state; the prefabricated support can support the pipeline in the pipeline assembling process and after the pipeline is assembled in place, so that the pipeline is firmer and is not easy to sink and misplace.
The present invention in a preferred example may be further configured to: the strut comprises two identical slide rods and a sleeve connected between the slide rods, the slide rods comprise a sliding section, a pushing plate and thread sections which are sequentially arranged, the sliding section is in sliding fit with the sliding hole, the pushing plate is arranged on one side, close to the first connecting ring and the second connecting ring, of the inner hole of the sleeve, internal threads with opposite rotating directions are arranged at two ends of the inner hole, the thread sections of the two slide rods are in threaded connection with the sleeve, and the cross section of the sliding hole and the sliding section is polygonal.
By adopting the technical scheme, before the positions between the first connecting ring and the second connecting ring and the pipelines are fixed, the sleeve is rotated to enable the two sliding rods to be far away from each other along the axial direction, the sliding section moves and rotates in the sliding hole for limiting, when a person rotates the sleeve, the sliding rods cannot rotate along with the sleeve but only can slide along the sliding hole, when the pushing plate is respectively pushed against one side of the first connecting ring and one side of the second connecting ring which are close to each other, the pushing plate pushes the first connecting ring and the second connecting ring to be far away from each other along with the continuous separation between the two sliding rods, the elastic piece is stretched, after the elastic piece is stretched to a certain degree, the adjustment of the supporting rod is stopped, the connecting piece is sleeved into the connecting position between the two adjacent pipelines, so that the first connecting ring and the second connecting ring are respectively positioned on the two different pipelines, and then the first connecting ring and the second connecting ring are respectively welded on the pipelines, and after the two sliding rods are firmly welded, the sleeve is rotated reversely, so that the two sliding rods are close to each other, the integral length of the stay bar is shortened, and when the length of the stay bar is smaller than the distance between the first connecting ring and the second connecting ring, the stay bar is taken out, the end parts of the two sections of pipelines are welded, the connection between the two adjacent sections of pipelines is completed, and the installation of the connecting piece is realized.
The present invention in a preferred example may be further configured to: the connecting piece still includes two semi-ring-shaped lag, the lag with first go-between with slide along its axial direction between the second go-between and connect and form the tube-shape between two lags.
Through adopting above-mentioned technical scheme, the lag protects the part between first go-between and the second go-between, prevents that the slot filler from entering into inside the connecting piece, influences the flexible of elastic component in the accommodation process, simultaneously, because the axial of lag slides the setting for can carry out axial when the earthquake between two sections pipelines and slide, can not take place to interfere with the regulation of elastic component, can prevent to take place the dislocation between two adjacent sections pipelines moreover.
The present invention in a preferred example may be further configured to: the prefabricated support comprises a base and a bracket arranged on the base, wherein an adjusting cylinder is rotatably connected to the lower side of the bracket, and the lower side of the adjusting cylinder is in threaded connection with the base.
Through adopting above-mentioned technical scheme, rotate and adjust a section of thick bamboo, adjust a section of thick bamboo through with the base between threaded connection and take place to rise to drive the bracket and rise or descend, thereby make the pipeline that supports on the bracket rise or descend, realize the regulation to the pipeline height, guarantee good alignment between the tip of adjacent pipeline, because rotate between bracket and the regulation section of thick bamboo and be connected, consequently adjust the rotation of a section of thick bamboo and can not drive the bracket and rotate together, make the bracket have the self-adaptability to the direction of pipeline.
The second purpose of the invention is to provide a construction method of a heat supply pipeline connecting structure, which has the beneficial effect of preventing the dislocation of the pipeline connecting position and the cracking of a welding seam.
The second object of the present invention is achieved by the following technical solutions:
a construction method of a heat supply pipeline connecting structure comprises the following steps:
s1: and (3) measurement and paying-off: according to the landform, measuring the burying position and the trend of the pipeline, paying off and marking, and marking the positions of the prefabricated support and the lifting appliance;
s2: excavating a groove: excavating a groove to reach a designed elevation and a standard width according to the measurement result and the pay-off position;
s3: cleaning and tamping: flattening the tank bottom, cleaning impurities at the tank bottom, tamping the tank bottom, wherein the tamping degree is not lower than 95%;
s4: primary backfilling: backfilling the bottom of the tank with sand, and tamping in layers, wherein the thickness of the sand layer is between 1/2-2/3 of the set height between the bottom of the pipeline and the bottom of the tank;
s5: hoisting a pipeline: sequentially hoisting the pipelines into the grooves;
s6: welding a connecting piece: sleeving the first connecting ring and the second connecting ring on the two pipelines respectively, aligning the end parts of the two pipelines, rotating the sleeve to enable the two sliding rods to move towards the two ends, enabling the pushing plate to gradually push the first connecting ring and the second connecting ring to move towards the directions away from each other to stretch the elastic piece, and welding the first connecting ring and the second connecting ring on the two pipelines respectively;
s7: welding a pipeline: aligning the end parts of the two pipelines and then welding;
s8: taking down the support rod: reversely rotating the sleeve, and taking down the stay bar when the length of the stay bar is smaller than the distance between the first connecting ring and the second connecting ring;
s9: and (3) testing the pipeline: performing a strength test and a tightness test of the pipeline;
s10: sleeving a protective sleeve: the two protective sleeves are respectively sleeved between the first connecting ring and the second connecting ring in a sliding manner to form a closed cavity;
s11: backfilling earthwork: the trench is backfilled with a filler material to level with the top of the trench and tamped.
Through adopting above-mentioned technical scheme, during the first time backfilling for highly being less than the pipeline height of packing, when making things convenient for adjacent pipeline to link together, weld the pipeline from the pipeline below. When two adjacent pipelines are connected together, the first connecting ring and the second connecting ring are respectively welded on the two pipelines, and under the action of the elastic piece, the first connecting ring and the second connecting ring have the tendency of approaching to each other, so that the welding position between the two pipelines is not easy to crack; meanwhile, due to the arrangement of the protective sleeve, only axial sliding can be realized between two adjacent sections of pipelines, and radial dislocation can not be realized, so that smooth butt joint between the adjacent pipelines is further ensured, and cracking and dislocation between the pipelines are prevented.
The present invention in a preferred example may be further configured to: the S5 includes:
s51: hoisting by a crane: hoisting the pipeline from two ends of the pipeline by using a crane, moving the pipeline to the upper part of the groove, and then lowering the pipeline;
s52: manufacturing a lifting appliance: sleeving a cylindrical rod piece with a lifting rope, wherein two ends of the rod piece are supported at two ends of the groove, the lifting rope is positioned in the middle of the rod piece, and the middle of the lifting rope hangs downwards to form a lifting appliance;
s53: pipeline replacement: lowering the pipeline: move two hoists respectively to pipeline middle part direction, when the lifting rope was located under the pipeline, continuously transferred the pipeline and all contacted with the lifting rope to its both ends, then the loop wheel machine loosens, and the pipeline supports on the hoist completely.
Through adopting above-mentioned technical scheme, the hoist structure of self-control is simple and easy, and is with low costs, and the later stage after pipeline rigidity and welding are good, only need take out the member, take off the lifting rope and can dismantle the hoist, and the loop wheel machine then can continue to go other pipelines of hoist and mount after accomplishing the pipeline replacement, has improved the efficiency of construction greatly or has reduced construction cost, and the utilization ratio of loop wheel machine is higher.
The present invention in a preferred example may be further configured to: the S11 includes:
s111: backfilling a rubber improved layer: mixing rubber particles and sand to prepare a rubber modified filler, wherein the upper surface of a backfilled rubber modified layer is not lower than the height of the central axis of the pipeline;
s112: backfilling a foundation soil layer: and backfilling the upper part of the trench by using the foundation soil generated by trench excavation until the top of the trench is level with the two sides.
Through adopting above-mentioned technical scheme, the setting up of rubber modified layer makes the ground of pipeline below have certain elasticity, and when perhaps pipeline top atress was great when the earthquake, the pipeline can take place slight displacement on the ground in order to adapt to vibrations, prevents that the shaking force is great and makes welding position take place rigidity fracture, prevents simultaneously to extrude the damage pipeline, and the roughness and the closely knit degree of pipeline top have been guaranteed to the foundation soil filling layer.
The present invention in a preferred example may be further configured to: the S112 further includes: and when the foundation soil is backfilled to a position which is 10cm to 30cm higher than the top of the pipeline, leveling and tamping the filling layer, horizontally putting a reinforcing steel bar frame in the groove, and inserting the reinforcing steel bars at the edge of the reinforcing steel bar frame into the side wall of the groove.
Through adopting above-mentioned technical scheme, the edge of reinforcing bar frame relies on the slot lateral wall to support for during the atress of pipeline top, the power of top not only can vertically transmit the pipeline on, can transmit slot edge lateral wall through the reinforcing bar net in addition, further reduced the direct power that bears of needs pipeline, formed fine protection to the pipeline, prevent that the pipeline pressurized from warping or damaged.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the connecting piece is arranged between the two adjacent pipelines, so that the two pipelines are connected more tightly, and the welding seam at the pipeline connecting position is prevented from cracking and leaking in the earthquake;
2. the rubber improved layer is filled below the pipeline, so that the pipeline which is dislocated and sunk in the earthquake can be quickly restored to the position;
3. by arranging the reinforcing steel bar frame above the pipeline, the stress above the pipeline is better transferred to the edge of the groove, and the bearing of the pipeline is reduced.
Drawings
Fig. 1 is a schematic view of a heat supply pipeline connection structure according to an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic sectional view of the plane B-B in fig. 1.
Fig. 4 is a schematic structural view of a heat supply pipeline connecting structure according to the present invention, taken along a direction perpendicular to the length direction of the groove.
FIG. 5 is a flow chart of a construction method of a heat supply pipeline connection structure according to a second embodiment of the present invention
Fig. 6 is a flowchart of the step S5.
Fig. 7 is a flowchart of the step S11.
In the figure, 1, a groove; 11. a step groove; 2. a pipeline; 3. a connecting member; 31. a first connecting ring; 32. a second connection ring; 33. an elastic member; 34. a stay bar; 341. a slide bar; 3411. a slipping section; 3412. pushing the plate; 3413. a threaded segment; 342. a sleeve; 35. a protective sleeve; 4. prefabricating a bracket; 41. a bracket; 42. a base; 43. an adjusting cylinder; 5. and (4) reinforcing steel bar frames.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1, the heat supply pipeline connection structure disclosed in this embodiment of the present invention includes a plurality of pipelines 2 connected end to end, a connecting member 3 disposed between two adjacent pipelines 2, and a prefabricated support 4 supported below two ends of the pipelines 2, wherein the pipelines 2, the connecting member 3, and the prefabricated support have fillers outside, and the tops of the fillers are flush with two sides of the upper end of the groove 1.
Referring to fig. 2 and 3, the connecting member 3 in this embodiment includes a first connecting ring 31, a second connecting ring 32, at least three elastic members 33 and at least two support rods 34 disposed between the first connecting ring 31 and the second connecting ring 32, the first connecting ring 31 and the second connecting ring 32 are coaxially connected to two adjacent pipes 2, respectively, the elastic members 33 have a tendency of drawing the first connecting ring 31 and the second connecting ring 32 closer when the connecting member 3 is in use, the elastic members 33 in the present invention are springs, four of the elastic members are distributed around the center array of the first connecting ring 31 or the second connecting ring 32, the two support rods 34 are symmetrically distributed by staggering the springs, two slide holes are respectively disposed on the first connecting ring 31 and the second connecting ring 32 corresponding to the positions of the support rods 34, the support rods 34 include two identical slide bars 341 and a sleeve 342 connected between the slide bars 341, the slide bars 341 include slide segments 3411, b, c, The pushing plate 3412 is disposed on one side of the first connecting ring 31 and the second connecting ring 32 close to each other, two ends of an inner hole of the sleeve 342 are respectively provided with internal threads with opposite turning directions, the threaded sections 3413 of the two sliding rods 341 are respectively in threaded connection with the sleeve 342, and the cross-sectional shapes of the sliding hole and the sliding section 3411 are polygonal.
Referring to fig. 3, in order to prevent the groove 1 filler from entering the inside of the connecting member 3 and affecting the expansion and contraction of the elastic member 33 during the adjustment process, the connecting member 3 further includes two semi-annular protective sleeves 35, the protective sleeves 35 are connected with the first connecting ring 31 and the second connecting ring 32 in a sliding manner along the axial direction thereof, the two protective sleeves 35 are spliced together to form a cylinder shape, the protective sleeves 35 protect the portion between the first connecting ring 31 and the second connecting ring 32 to prevent the filler from entering, and meanwhile, due to the axial sliding arrangement of the protective sleeves 35, the two sections of pipelines 2 can slide axially during an earthquake, and cannot interfere with the adjustment of the elastic member 33, and can prevent the dislocation between the two adjacent sections of pipelines 2.
Referring to fig. 1, the prefabricated support 4 comprises a base 42 and a bracket 41 arranged on the base 42, wherein an adjusting cylinder 43 is rotatably connected below the bracket 41, and the lower part of the adjusting cylinder 43 is in threaded connection with the base 42. When the adjusting cylinder 43 is rotated, the adjusting cylinder 43 rises through the threaded connection with the base 42 and drives the bracket 41 to rise or fall, so that the pipeline 2 supported on the bracket 41 rises or falls, the height of the pipeline 2 is adjusted, good alignment between the end parts of the adjacent pipelines 2 is ensured, and the bracket 41 is rotatably connected with the adjusting cylinder 43, so that the bracket 41 cannot be driven to rotate together by the rotation of the adjusting cylinder 43, and the bracket 41 has self-adaptability to the direction of the pipeline 2.
The implementation principle of the embodiment of the invention is as follows:
during construction, before the positions of the first connecting ring 31 and the second connecting ring 32 and the pipeline 2 are fixed, the sleeve 342 is first rotated, so that the two sliding rods 341 are axially away from each other, the sliding section 3411 is moved and rotationally limited in the sliding hole, so that when a person rotates the sleeve 342, the sliding rods 341 do not rotate together with the sleeve 342 but only slide along the sliding hole, when the pushing plate 3412 abuts against one side of the first connecting ring 31 and the second connecting ring 32, respectively, the pushing plate 341 pushes the first connecting ring 31 and the second connecting ring 32 away from each other with the continuous distance between the two sliding rods 341, the elastic member 33 is stretched, when the elastic member 33 is stretched to a certain extent, the adjustment of the supporting rod 34 is stopped, the connecting member 3 is sleeved into the connecting position between the two adjacent pipelines 2, so that the first connecting ring 31 and the second connecting ring 32 are respectively located on two different segments of the pipeline 2, then, the first connecting ring 31 and the second connecting ring 32 are respectively welded on the pipeline 2, after the welding is firm, the sleeve 342 is rotated reversely, so that the two sliding rods 341 approach each other, the whole length of the stay bar 34 is shortened, when the length of the stay bar 34 is smaller than the distance between the first connecting ring 31 and the second connecting ring 32, the stay bar 34 is taken out, the end parts of the two sections of pipelines 2 are welded, the connection between the two adjacent sections of pipelines 2 is completed, and the installation of the connecting piece 3 is realized.
After the connecting piece 3 is used, when two adjacent pipelines 2 are connected together, the first connecting ring 31 and the second connecting ring 32 are respectively connected to the two pipelines 2, under the action of the elastic piece 33, the first connecting ring 31 and the second connecting ring 32 have the tendency of being close to each other, so that the welding position between the two pipelines 2 is not easy to crack, meanwhile, when an earthquake happens, even if the welding seam between the two adjacent pipelines 2 is deformed or slightly cracked, after the deformation, under the action of the elastic piece 33, the first connecting ring 31 and the second connecting ring 32 are respectively close to the middle, and the two pipelines 2 are driven to be close to each other, the connection is firmer after the end part is extruded, and the pipelines 2 are prevented from leaking.
Example two
The embodiment of the invention discloses a construction method suitable for a heat supply pipeline connecting structure disclosed by the embodiment I, which comprises the following steps:
s1: and (3) measurement and paying-off: according to the landform, the position and the trend of the pipeline 2 are buried and measured, the mark is paid off, and the positions of the prefabricated support 4 and the lifting appliance are marked according to the length and the curvature of the pipeline 2.
S2: excavating a groove 1: according to the measurement result and the pay-off position, the trench 1 is excavated to reach the designed elevation and standard width, and a step groove 11 with the width larger than the lower width is arranged at the position, 225-30cm higher than the preset pipeline, of the trench 1.
S3: cleaning and tamping: flattening the bottom of the tank, cleaning impurities at the bottom of the tank, and tamping the bottom of the tank, wherein the tamping degree is not lower than 95%.
S4: primary backfilling: the bottom of the groove is backfilled with medium-coarse gravel, the medium-coarse gravel is tamped in layers, the thickness of the filler on each layer is not more than 65cm, the thickness of the tamped gravel layer is between 1/2 and 2/3 of the set height between the bottom of the pipeline 2 and the bottom of the groove, and the height of the filler is lower than the height of the pipeline 2, so that the pipeline 2 can be conveniently welded from the lower part of the pipeline 2 when adjacent pipelines 2 are connected together.
S5: hoisting the pipeline 2: the pipes 2 are sequentially hoisted into the grooves 1. The method specifically comprises the following steps:
s51: hoisting by a crane: hoisting the pipeline 2 from two ends of the pipeline 2 by using a crane, moving the pipeline 2 to the upper part of the groove 1, and then lowering the pipeline 2;
s52: manufacturing a lifting appliance: sleeving a cylindrical rod piece with a lifting rope, wherein two ends of the rod piece are supported at two ends of the groove 1, the lifting rope is positioned in the middle of the rod piece, the middle of the lifting rope downwards hangs to form a lifting appliance, and the lifting appliance is placed at a position outside the projection of the pipeline 2 in the vertical direction, so that the pipeline 2 is prevented from being interfered to be lowered;
s53: replacement of the pipeline 2: transfer pipeline 2 to being less than when slot 1, remove two hoists to 2 middle part directions of pipeline respectively, when the lifting rope is located under pipeline 2, continuously transfer pipeline 2 to its both ends all with the lifting rope contact, then the loop wheel machine loosens, pipeline 2 supports completely on the hoist, simultaneously, lays prefabricated support 4 in pipeline 2 below.
The self-made hoist structure is simple and easy, and is with low costs, after 2 rigidity of later stage pipeline and welding are good, only need take out the member, take off the lifting rope and can dismantle the hoist for pipeline 2 falls on presetting the support, and the loop wheel machine then can continue to go to hoist and mount other pipelines 2 after accomplishing pipeline 2 replacement, has improved the efficiency of construction greatly or has reduced construction cost, and the utilization ratio of loop wheel machine is higher.
S6: and (3) welding a connecting piece: the first connecting ring 31 and the second connecting ring 32 are respectively sleeved on the two pipes 2, the ends of the two pipes 2 are aligned, the sleeve 342 is rotated to move the two sliding rods 341 towards the two ends, the pushing plate 3412 gradually pushes the first connecting ring 31 and the second connecting ring 32 to move in the direction away from each other to stretch the elastic member 33, and the first connecting ring 31 and the second connecting ring 32 are respectively welded on the two pipes 2.
S7: welding the pipeline 2: the ends of the two pipes 2 are aligned and welded.
S8: taking down the stay bar 34: the sleeve 342 is rotated reversely, and when the length of the stay 34 is smaller than the distance between the first and second connection rings 31 and 32, the stay 34 is removed.
S9: and (3) testing of the pipeline 2: the pipe 2 was subjected to a strength test and a tightness test.
S10: sheathing a protective sleeve 35: two protective sleeves 35 are respectively slidably sleeved between the first connecting ring 31 and the second connecting ring 32 to form a closed cavity.
S11: backfilling earthwork: the trench 1 is backfilled with a filler material to level with the top of the trench 1 and tamped. The method specifically comprises the following steps:
s111: backfilling a rubber improved layer: the rubber modified filler is prepared by mixing rubber particles and sand in a ratio of 1:5, the upper surface of the rubber modified layer after backfilling is not lower than the height of the central axis of the pipeline 2, and the tamping degree of the rubber modified layer is not less than 94%. The setting on rubber modified layer makes the ground of pipeline 2 below have certain elasticity, and when the earthquake or pipeline 2 top atress was great, pipeline 2 can take place slight displacement in order to adapt to vibrations on the ground, prevents that the vibrations power is great and make welding position take place rigidity fracture, prevents simultaneously to extrude damage pipeline 2.
S112: backfilling a foundation soil layer: the upper portion of the groove 1 is backfilled by using foundation soil generated by excavating the groove 1, when the foundation soil is backfilled to the step groove 11, a filling layer is leveled and tamped, then the reinforcing steel bar frame 5 is horizontally placed at the step groove 11, reinforcing steel bars at the edge of the reinforcing steel bar frame 5 are located above the step groove 11, then the foundation soil is continuously filled, and a small-sized tamping machine is used for tamping in layers until the filling soil is level with the two sides of the groove 1. When the setting of reinforcing bar frame 5 made pipeline 2 top atress, the power of top not only can be vertically transmitted to pipeline 2 on, can transmit on the 1 marginal lateral wall of slot through the reinforcing bar net moreover, further reduced the power that needs pipeline 2 directly to bear, formed fine protection to pipeline 2, prevent that pipeline 2 pressurized deformation or damage.
The implementation principle of the embodiment is as follows:
during primary backfilling, when two adjacent pipelines 2 are connected together, the first connecting ring 31 and the second connecting ring 32 are respectively welded on the two sections of pipelines 2, under the action of the elastic piece 33, the first connecting ring 31 and the second connecting ring 32 have the tendency of approaching to each other, so that the welding position between the two pipelines 2 is not easy to crack, meanwhile, when an earthquake occurs, even if the welding seam between the two adjacent pipelines 2 is deformed or slightly cracked, after the deformation, under the action of the elastic piece 33, the first connecting ring 31 and the second connecting ring 32 respectively approach to the middle and drive the two pipelines 2 to approach to each other, the connection is firmer after the end part is extruded, and the pipelines 2 are prevented from leaking; meanwhile, the arrangement of the protective sleeve 35 enables only axial sliding to occur between two adjacent sections of pipelines 2 without radial dislocation, further ensures smooth butt joint between the adjacent pipelines 2 and prevents the pipelines 2 from cracking and dislocating.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. The utility model provides a heat supply pipeline connection structure, includes a plurality of pipelines (2) that end to end, locates connecting piece (3) between two adjacent pipelines (2) and locates prefabricated support (4) of pipeline (2) both ends below, its characterized in that: the connecting piece (3) comprises a first connecting ring (31), a second connecting ring (32), at least three elastic pieces (33) and at least two support rods (34), wherein the elastic pieces (33) and the support rods (34) are arranged between the first connecting ring (31) and the second connecting ring (32), the first connecting ring (31) and the second connecting ring (32) are respectively connected to the adjacent pipelines (2), and the elastic pieces (33) have the tendency of drawing the first connecting ring (31) and the second connecting ring (32) close when the connecting piece (3) is in a use state;
the sliding rod (34) comprises two identical sliding rods (341) and a sleeve (342) connected between the sliding rods (341), the sliding rods (341) comprise sliding sections (3411), pushing plates (3412) and threaded sections (3413) which are sequentially arranged, the sliding sections (3411) are in sliding fit with the sliding holes, the pushing plates (3412) are arranged on one sides, close to the first connecting ring (31) and the second connecting ring (32), of the inner hole of the sleeve (342), internal threads with opposite turning directions are respectively arranged at two ends of the inner hole of the sleeve (342), the threaded sections (3413) of the two sliding rods (341) are in threaded connection with the sleeve (342), and the cross sections of the sliding holes and the sliding sections (3411) are polygonal.
2. The heating pipeline connecting structure according to claim 1, wherein: the connecting piece (3) further comprises two semi-annular protecting sleeves (35), the protecting sleeves (35) are connected with the first connecting ring (31) and the second connecting ring (32) in a sliding mode along the axial direction of the first connecting ring and the second connecting ring (32) in an assembled mode to form a cylinder shape.
3. The heating pipeline connecting structure according to claim 1, wherein: prefabricated support (4) include base (42) and locate bracket (41) on base (42), bracket (41) below is rotated and is connected with regulation section of thick bamboo (43), adjust section of thick bamboo (43) below threaded connection in on base (42).
4. A construction method for the heat supply pipeline connecting structure of claim 2, characterized in that: the method comprises the following steps:
s1: and (3) measurement and paying-off: according to the landform, measuring the burying position and the trend of the pipeline (2), paying off and marking, and marking the positions of the prefabricated support (4) and the lifting appliance;
s2: excavating a groove (1): according to the measurement result and the paying-off position, excavating the groove (1) to reach the designed elevation and standard width;
s3: cleaning and tamping: flattening the tank bottom, cleaning impurities at the tank bottom, tamping the tank bottom, wherein the tamping degree is not lower than 95%;
s4: primary backfilling: backfilling the bottom of the groove with sand, tamping in layers, wherein the thickness of the sand layer is between 1/2 and 2/3 of the set height between the bottom of the pipeline (2) and the bottom of the groove;
s5: hoisting the pipeline (2): sequentially hoisting the pipeline (2) into the groove (1);
s6: welding the connecting piece (3): sleeving a first connecting ring (31) and a second connecting ring (32) on the two pipelines (2) respectively, aligning the end parts of the two pipelines (2), rotating a sleeve (342) to enable two sliding rods (341) to move towards two ends, gradually pushing a pushing plate (3412) to push the first connecting ring (31) and the second connecting ring (32) to move towards the directions away from each other to stretch an elastic piece (33), and welding the first connecting ring (31) and the second connecting ring (32) on the two pipelines (2) respectively;
s7: welding the pipeline (2): aligning the end parts of the two pipelines (2) and then welding;
s8: removing the lower stay (34): reversely rotating the sleeve (342), and removing the stay bar (34) when the length of the stay bar (34) is less than the distance between the first connecting ring (31) and the second connecting ring (32);
s9: pipeline (2) test: performing a strength test and a tightness test of the pipeline (2);
s10: sheathing a protective sleeve (35): the two protective sleeves (35) are respectively sleeved between the first connecting ring (31) and the second connecting ring (32) in a sliding manner to form a closed cavity;
s11: backfilling earthwork: the trench (1) is backfilled with a filler material to level with the top of the trench (1) and tamped.
5. The construction method of the heat supply pipeline connecting structure according to claim 4, characterized in that: the S5 includes:
s51: hoisting by a crane: hoisting the pipeline (2) from two ends of the pipeline (2) by using a crane, moving the pipeline (2) to the upper part of the groove (1), and then lowering the pipeline (2);
s52: manufacturing a lifting appliance: sleeving a cylindrical rod piece with a lifting rope, wherein two ends of the rod piece are supported at two ends of the groove (1), the lifting rope is positioned in the middle of the rod piece, and the middle of the lifting rope hangs downwards to form a lifting appliance;
s53: lowering the pipeline (2): move two hoists respectively to pipeline (2) middle part direction, when the lifting rope was located under pipeline (2), lastingly transferred pipeline (2) and all contacted with the lifting rope to its both ends, then the loop wheel machine loosens, and pipeline (2) support completely on the hoist.
6. The construction method of the heat supply pipeline connecting structure according to claim 4, characterized in that: the S11 includes:
s111: backfilling a rubber improved layer: rubber particles and sand are mixed to prepare a rubber modified filler, and the upper surface of a backfilled rubber modified layer is not lower than the height of the central axis of the pipeline (2);
s112: backfilling a foundation soil layer: and backfilling the upper part of the groove (1) by adopting the base soil generated by excavating the groove (1) until the top of the groove (1) is level with the two sides.
7. The construction method of the heat supply pipeline connecting structure according to claim 6, characterized in that: the S112 further includes: when the foundation soil is backfilled to a position 10cm to 30cm higher than the top of the pipeline (2), leveling and tamping the filling layer, horizontally putting the reinforcing steel bar frame (5) in the groove (1), and inserting the reinforcing steel bars at the edge of the reinforcing steel bar frame (5) into the side wall of the groove (1).
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