CN113977842A - Production process of prefabricated directly-buried heat-insulating pipe - Google Patents
Production process of prefabricated directly-buried heat-insulating pipe Download PDFInfo
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- CN113977842A CN113977842A CN202111231373.6A CN202111231373A CN113977842A CN 113977842 A CN113977842 A CN 113977842A CN 202111231373 A CN202111231373 A CN 202111231373A CN 113977842 A CN113977842 A CN 113977842A
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- pipe
- pipeline
- production process
- outer protecting
- bodies
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000005187 foaming Methods 0.000 claims abstract description 26
- 229920002635 polyurethane Polymers 0.000 claims abstract description 15
- 239000004814 polyurethane Substances 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 37
- 238000009413 insulation Methods 0.000 claims description 6
- 238000009933 burial Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- -1 polyethylene Polymers 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 229920001903 high density polyethylene Polymers 0.000 description 7
- 239000004700 high-density polyethylene Substances 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 208000035388 Ring chromosome 22 syndrome Diseases 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/35—Component parts; Details or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Thermal Insulation (AREA)
Abstract
The application provides a prefabricated direct-burried insulating tube production technology, includes: correcting the deformation of the outer protecting pipe caused by stress by using an outer protecting pipe adjusting device, and fixedly clamping a plurality of outer protecting pipes with different diameters by using the outer protecting pipe adjusting device; fixedly sleeving pipeline supporting pieces on the pipeline at intervals along the length direction of the pipeline; each pipeline supporting piece can be in pressing contact with the inner wall of the outer protecting pipe; and forming a foaming space with equal circumferential direction between the pipeline supporting piece supporting pipe and the outer protecting pipe, and injecting a polyurethane foaming material into the foaming space to prepare the prefabricated direct-buried heat-insulating pipe. It can be seen from the above description that, correct fixed the being circular back with the outer pillar of polyethylene earlier through above technology, install pipeline support piece on the pipeline, support piece is according to the foaming thickness of difference, adjusts the support automatically to form even polyurethane foaming space, guarantee the homogeneity of polyurethane heat preservation.
Description
Technical Field
The application relates to the technical field of prefabricated direct-buried insulating pipes, in particular to a production process of the prefabricated direct-buried insulating pipe.
Background
In recent years, prefabricated direct-buried heat-insulating pipes are widely used for various pipelines for heat supply, refrigeration, oil transportation, steam transportation and the like due to simple construction and remarkable energy-saving and corrosion-resistant effects. The high-density polyethylene outer protecting pipe needs to be placed for a period of time for use after production is finished, the caliber of the pipeline used at present is larger and larger, and meanwhile, the pipe end of the high-density polyethylene outer protecting pipe can be shrunk to a certain extent due to stress, and can not be like a steel pipe, so that the pipe penetrating difficulty is caused in the pipe penetrating process, and the labor capacity of workers is increased invisibly.
In addition, the original prefabricated direct-buried heat insulation pipe is produced by adopting wooden or plastic supports which are bound in series by metal wires. In the pipe sleeve process, the supports for binding the wood blocks and the plastic blocks are rigidly bound on a working pipeline by metal wires, and in the process of sleeving the working pipeline into the high-density polyethylene outer protective pipe, due to the friction of the outer protective pipe, the wood blocks and the plastic blocks can be broken and moved, so that no support is arranged at the middle part and the tail end of the pipeline, the space between the outer protective pipe and the working pipeline is uniform, and the polyurethane insulation is not uniform after foaming.
Disclosure of Invention
In view of this, the application provides a production process of a prefabricated directly-buried insulating pipe, which is used for improving the uniformity of a polyurethane foam layer when the prefabricated directly-buried insulating pipe is processed.
According to the production process of the prefabricated directly-buried insulating pipe, the outer protective pipe is corrected into a cylindrical shape by the outer protective pipe adjusting device, so that a pipeline can be conveniently penetrated;
correcting the deformation of the outer protecting pipe caused by stress by using an outer protecting pipe adjusting device, and fixedly clamping a plurality of outer protecting pipes with different diameters by using the outer protecting pipe adjusting device;
fixedly sleeving pipeline supporting pieces on the pipeline at intervals along the length direction of the pipeline;
each pipeline supporting piece can be in pressing contact with the inner wall of the outer protecting pipe;
and forming a foaming space with equal circumferential direction between the pipeline supporting piece supporting pipe and the outer protecting pipe, and injecting a polyurethane foaming material into the foaming space to prepare the prefabricated direct-buried heat-insulating pipe.
Outer pillar adjusting device includes: the device comprises two table bodies which are arranged in a mirror image mode and adjustable in width, wherein a V-shaped table is formed between the two table bodies, and a deviation-correcting plate matched with the arc of the outer wall of an outer protective pipe is arranged on each table body at intervals along the length direction of the table body and connected with an elastic driving piece;
the pipeline support piece is used for supporting between the pipeline and the outer protective pipe; the pipe support includes: the device comprises a lantern ring, a plurality of elastic supporting pieces and universal balls, wherein the lantern ring is hinged with two semicircular bodies oppositely and can be locked at a set position on the outer wall of a pipeline;
after the plurality of deviation correcting plates mutually support and press the outer protective pipe to be cylindrical, the plurality of elastic supporting pieces support a foaming space with equal gaps between the pipeline and the outer protective pipe.
It can be seen from the above description that after the outer pillar of polyethylene is corrected and fixed to be circular, the pipeline supporting piece is installed on the pipeline, and the elastic supporting piece automatically adjusts and supports according to different foaming thicknesses, so that an even polyurethane foaming space is formed, and the uniformity of a polyurethane heat-insulating layer is ensured.
In one embodiment, the two table bodies are connected at two ends through a lead screw adjusting component. The V-shaped space between the two platforms is adjusted, so that the device is suitable for outer protecting pipes with different diameters.
And, the lead screw adjusting assembly includes: the screw rods are respectively arranged on the two table bodies and are in threaded connection with the nuts;
the screw thread directions of the nuts of the two table bodies are opposite, and the end part of the screw lever is connected with a driving assembly. The driving component drives the wire lever to rotate, and the two platforms are mutually far away or mutually close in the rotating process of the wire lever.
In one possible embodiment, both the tables are supported by supporting legs equipped with casters, and the casters are equipped with trample brakes thereon. The universal casters are arranged to enable the two table bodies to move correspondingly or be locked and fixed.
In one possible embodiment, each table body is provided with an assembly groove along the width direction, and a moving block is connected to the interior of each assembly groove through the elastic driving piece;
the deviation-correcting plate is hinged with the corresponding moving block through a limiting shaft. The moving block moves along the assembling groove, and the elastic driving piece abuts against the deviation rectifying plate to apply abutting-against rectifying force on the outer wall of the outer protective pipe.
In one possible embodiment, the resilient drive member comprises: the springs are arranged at two ends of the assembling groove, and the two opposite sides of the moving block are provided with limiting grooves matched with the corresponding springs. The spring provides a resisting force for the deviation correcting plate, so that the deviation correcting plate and the distance adjustment of the two table bodies are matched with each other to correct the outer protective pipe.
In one embodiment, the arc directions of the deviation correcting plates on the two tables face each other. The deviation correcting plates on the two table bodies oppositely support and press the outer wall of the outer protective pipe, so that the correcting effect is obvious.
In one embodiment, the two semi-circular bodies are hinged through a rotating shaft, and one ends of the two semi-circular bodies, which are far away from the rotating shaft, are locked and closed through bolts. The lantern ring is hinged by two semicircular bodies, so that the device is suitable for pipelines with different diameters.
In one possible embodiment, the inner wall of the collar is provided with a non-slip layer. The position of the ring sleeve is stable, and the ring sleeve does not displace when penetrating into the outer protecting pipe.
In one embodiment, the outer wall of the collar is circumferentially provided with a mounting groove for assembling the elastic support;
the elastic support member includes: the two rod bodies are connected in the mounting groove in a relatively sliding mode, and a tension spring for connecting the two rod bodies is arranged in the mounting groove;
the top of the two rod bodies is hinged with a supporting block, and a limiting groove corresponding to the universal ball matched with the universal ball is formed in the supporting block. Through the elastic support piece who is equipped with, make behind the pipeline level penetrated the outer pillar, a plurality of elastic support piece support pipeline and outer pillar are apart from impartial foaming space.
Drawings
FIG. 1 is a schematic structural diagram of a production process of a prefabricated directly-buried insulating pipe provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a deviation rectification plate according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an elastic support according to an embodiment of the present application.
Reference numerals:
the device comprises an outer protective pipe adjusting device-1, a table body-11, a universal caster-12, a nut-13, a screw lever-14, a driving component-15, a deviation correcting device-16, a deviation correcting plate-161, a moving block-162, a limiting groove-163, a limiting shaft-164, an assembling groove-17 and a spring-18;
the pipe comprises a pipe supporting piece-2, a pipe-21, a lantern ring-22, a semi-circular body-221, a rotating shaft-222, a bolt-223, an anti-slip layer-224, a mounting groove-225, a rod body-226, a supporting block-227, a universal ball-228 and a tension spring-229.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.
In order to facilitate understanding of the production process of the prefabricated direct-buried insulating pipe provided by the embodiment of the application, firstly, an application scene of the production process is explained, the production process of the prefabricated direct-buried insulating pipe is mainly used for improving the problem that the pipe end of a high-density polyethylene outer protecting pipe is contracted inwards to a certain extent due to stress and does not have a round shape like a steel pipe, so that the pipe penetrating is difficult in the pipe penetrating process, the labor amount of workers is increased invisibly, and due to friction of the outer protecting pipe, the supporting block can be broken and moved, so that no support is arranged at the middle part and the tail end of the pipeline, the space between the outer protecting pipe and a working pipeline can not be uniform, and the problem of uneven heat preservation of polyurethane after foaming can be solved; the correction is simple in operation in the pipe penetrating process, and the support effect is good, so that the polyurethane heat-insulating layer is uniformly foamed.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a prefabricated direct burial thermal insulation pipe production process provided in an embodiment of the present application; the production process of the embedded direct-buried heat-insulating pipe utilizes the outer protective pipe adjusting device to correct deformation of the outer protective pipe caused by stress, and the outer protective pipe adjusting device is fixedly clamped with a plurality of outer protective pipes with different diameters;
fixedly sleeving pipeline supporting pieces on the pipeline at intervals along the length direction of the pipeline;
each pipeline supporting piece can be in pressing contact with the inner wall of the outer protecting pipe;
and forming a foaming space with equal circumferential direction between the pipeline supporting piece supporting pipe and the outer protecting pipe, and injecting a polyurethane foaming material into the foaming space to prepare the prefabricated direct-buried heat-insulating pipe.
Specifically, this outer pillar adjusting device 1 includes: two table bodies 11 which are arranged in a mirror image manner and have adjustable width; the two platforms 11 are independent structures and are foaming platforms, and a V-shaped platform for fixing the outer protective pipe is formed between the two platforms 11 in a combined mode. Therefore, the outer protective pipe affected by the stress is placed on the V-shaped platform to be corrected to be circular. The outer protective pipe is a pipe body prepared from high-density polyethylene, and the thickness of the outer protective pipe is 1-30 mm.
When correcting the operation to the outer pillar of different diameters, adopt the both ends of two stage bodies 11 to pass through lead screw adjusting part and connect in this embodiment. The V-shaped distance between the two table bodies 11 is adjusted, so that the device is suitable for outer protective pipes with different diameters.
And, the lead screw adjusting assembly includes: nuts 13 respectively provided on the two table bodies 11, and a screw lever 14 screw-coupled with the nuts 13; the nuts 13 of the two tables 11 are threaded in opposite directions, and the end of the screw lever 14 is connected with a driving assembly 15. The drive assembly 15 may employ a hand wheel or motor for driving rotation of the wire lever 14. The drive assembly 15 rotates the wire lever 14 and moves the two tables 11 away from or toward each other during the rotation of the wire lever 14.
When the two stage bodies 11 are moved and fixed, the two stage bodies 11 are supported by support legs equipped with casters 12, and the casters 12 are equipped with a brake. The universal caster wheels 12 are arranged to enable the two table bodies 11 to move correspondingly or be locked and fixed.
After the bottom of the outer protecting pipe is positioned on the V-shaped platform, the outer protecting pipe is subjected to internal shrinkage deformation under the stress action in the placing process. For this purpose, a deviation correcting device 16 matched with the arc of the outer wall of the outer protecting pipe is arranged on each table body 11 at intervals along the length direction. The deviation correcting devices 16 are arranged on the two table bodies 11 in a mutually facing mode, and in the process that the deviation correcting devices 16 on the two sides are close to each other, the outer walls of the outer protective pipes are in pressing contact, so that the outer protective pipes are corrected to be oval and round.
As shown in fig. 1 and 2, the deviation correcting devices 16 are arranged in plurality along the length direction of the table body 11, so as to correct different positions of the outer protective pipe; when the deviation correcting devices 16 are assembled, the elastic components drive the deviation correcting devices to provide abutting force, and the abutting force of the deviation correcting devices 16 on the two table bodies 11 is ensured to be consistent.
When specifically setting up deviation correcting device 16, all seted up assembly groove 17 along its width direction on every stage body 11, assembly groove 17 is inside to be connected with movable block 162 through the elastic drive spare. The deviation correcting device 16 comprises a deviation correcting plate 161 matched with the arc of the outer wall of the outer protecting pipe, and the deviation correcting plate 161 is hinged with a corresponding moving block 162 through a limiting shaft 164. The deviation-correcting plate 161 can rotate corresponding to the radian of the outer protective pipe by the limiting shaft 164, so that the effect of deviation correction is ensured, and the limiting shaft 164 can be locked in a state that the deviation-correcting plate 161 is completely attached to the outer wall of the outer protective pipe. The moving block 162 moves along the assembly groove 17, and the elastic driving member presses the deviation rectifying plate 161 to apply a pressing rectifying force to the outer wall of the outer protective tube.
The elastic driving member includes: the springs 18 are disposed at two ends of the assembly groove 17, and the two opposite sides of the moving block 162 are disposed with limit grooves 163 matched with the corresponding springs 18. The deviation correcting plate 161 is provided with a biasing force by the spring 18, thereby correcting the outer jacket in cooperation with the adjustment of the interval between the two table bodies 11.
The arc directions of the correction plates 161 on the two tables 11 face each other. The deviation-correcting plates 161 on the two table bodies 11 oppositely press the outer wall of the outer protective tube, so that the correcting effect is obvious.
In the above description, it can be seen that, when the high-density polyethylene outer protection pipe with a diameter of 50mm to 2000mm is fixedly corrected, the larger width between the two table bodies 11 is adjusted in advance, and the side of the outer protection pipe with larger stress is placed between the correction plates 161 on both sides. The driving component 15 drives the wire lever 14 to rotate, so that the two side table bodies 11 are close to each other. In the process that the two tables 11 approach each other, the deviation-correcting plates 161 are pressed against the outer wall of the outer protective tube under the action of the springs 18 to correct, and the distance between the two tables 11 approaches is gradually increased until the deviation-correcting plates 161 on the two sides correct the outer arc tube from an oval shape to a round shape. After the correction is completed, the universal wheels are locked, so that the two table bodies 11 are fixed in position, and the correcting plates 161 are mutually clasped to fix the outer protective pipes. Thereby in the poling process, guarantee outer pillar immovable. The inner wall of the deviation-correcting plate 161 can be provided with a friction layer for effective friction fixation.
With continued reference to fig. 1 and 3, a pipe support 2 is included for supporting between the pipe 21 and the outer jacket; this pipeline support piece 2 is used for improving the in-process that pipeline 21 emboliaed the outer pillar of high density polyethylene in the past, because the friction of outer pillar, breakage and removal phenomenon can appear in billet and plastic block, lead to pipeline 21 middle part and terminal not to have the support for the outer pillar can not be with the space between the working line 21 even, polyurethane heat preservation inhomogeneous phenomenon appears after the foaming.
For this purpose, the pipe support 2 comprises a collar 22 hinged with respect to each other by two semi-circular bodies 221 and lockable in a set position on the outer wall of the pipe 21; two semi-circular bodies 221 are used for hinging to form a collar 22, so that locking fixation can be carried out for pipes 21 with different diameters. The collar 22 can be provided with a diameter use kit, and the model of the pipeline 21 with large vertical drop height can be replaced. Thus being generally applicable to pipelines 21 of 15mm-1800 mm.
The two semi-circular bodies 221 are hinged through a rotating shaft 222, and one ends of the two semi-circular bodies 221, which are far away from the rotating shaft 222, are locked and closed through bolts 223. The two semi-circular bodies 221 are hinged through the lantern ring 22, so that the device is suitable for pipelines 21 with different diameters. The free ends of the two semi-circular bodies 221 are provided with threaded sleeves which are locked and fixed through bolts 223.
Meanwhile, in order to enhance the stability of the collar 22 fixed on the pipe 21, an anti-slip layer 224 is provided on the inner wall of the collar 22. The position of the ring sleeve is stable, and the ring sleeve is not easy to displace when penetrating into the outer protecting pipe.
In addition, a plurality of resilient supports are circumferentially spaced on the collar 22, and a ball transfer bearing 228 is provided on each resilient support. The elastic supporting members are arranged for supporting the same gap in the circumferential direction between the pipeline 21 and the outer protecting pipe, and when the pipeline 21 is horizontally pushed into the outer protecting pipe, the universal balls 228 on the elastic supporting members are in rolling contact with the inner wall of the outer protecting pipe, so that the friction coefficient is reduced.
The outer wall of the lantern ring 22 is circumferentially provided with a mounting groove 225 for assembling an elastic support; the elastic support member includes: two rod bodies 226 connected in the mounting groove 225 in a relatively sliding manner, and a tension spring 229 connected between the two rod bodies 226 is arranged in the mounting groove 225; the tops of the two rod bodies 226 are hinged with supporting blocks 227, and the supporting blocks 227 are provided with limiting grooves 163 matched with the universal balls 228 correspondingly. Through the elastic support piece that is equipped with, make pipeline 21 level penetrate the outer pillar after, a plurality of elastic support piece support pipeline 21 and outer pillar are apart from the equipartition foaming space.
Meanwhile, in order to prevent the sagging problem of the pipe 21 during the pushing process, an elastic support member located right under and above the pipe 21 during the pushing process of the pipe 21 may be used for locking support or fixed support.
As can be seen from the above description, after the outer protective pipe adjusting device 1 adjusts the outer protective pipe to be circular, the pushing mechanism pushes the pipeline 21 toward the inside of the outer protective pipe; a plurality of matched pipe supports 2 are installed on the pipe 21 at intervals in advance. The distance between the pipeline 21 and the outer protective pipe is 20mm-200mm by the pipeline supporting part 2. When the first group of elastic support members entering the inner part of the outer protecting pipe contract and then recover the elastic support, the two rod bodies 226 of the elastic support members above and below are fixed, or the same matched external members (such as supporting rods, iron wires and the like) are adopted to fix the two rod bodies 226 on the elastic support members so as to avoid the change of the elastic coefficient caused by the influence of the drooping force of the pipeline 21. The pipe 21 continues to be horizontally pushed, and the universal balls 228 on the plurality of elastic supporting members rotate in an abutting manner, so that the friction between the pipe supporting member 2 and the outer protecting pipe is reduced. Make inside a plurality of pipeline support piece 2 got into outer pillar in proper order, make between pipeline 21 and the outer pillar apart from equal clearance, inject polyurethane in equal clearance afterwards and foam, the foaming is even. In addition, in the propelling process of the pipeline 21, the stress of the pipeline supporting part 2 is small, and the pipeline can be made of plastic materials, so that the manufacturing cost is greatly reduced, and the production process of the prefabricated direct-buried heat-insulation pipe with high level is ensured.
According to the invention, after the outer polyethylene protective pipe is corrected and fixed to be circular, the pipeline supporting piece 2 is installed on the pipeline 21, and the elastic supporting piece automatically adjusts and supports according to different foaming thicknesses, so that a uniform polyurethane foaming space is formed, and the uniformity of a polyurethane heat-insulating layer is ensured.
Claims (10)
1. A production process of a prefabricated directly-buried insulating pipe is characterized by comprising the following steps:
correcting the deformation of the outer protecting pipe caused by stress by using an outer protecting pipe adjusting device, and fixedly clamping a plurality of outer protecting pipes with different diameters by using the outer protecting pipe adjusting device;
fixedly sleeving pipeline supporting pieces on the pipeline at intervals along the length direction of the pipeline;
each pipeline supporting piece can be in pressing contact with the inner wall of the outer protecting pipe;
and forming a foaming space with equal circumferential direction between the pipeline supporting piece supporting pipe and the outer protecting pipe, and injecting a polyurethane foaming material into the foaming space to prepare the prefabricated direct-buried heat-insulating pipe.
2. The production process of the prefabricated direct-burial thermal insulation pipe according to claim 1,
outer pillar adjusting device includes: the device comprises two table bodies which are arranged in a mirror image mode and adjustable in width, wherein a V-shaped table is formed between the two table bodies, and a deviation-correcting plate matched with the arc of the outer wall of an outer protective pipe is arranged on each table body at intervals along the length direction of the table body and connected with an elastic driving piece;
the pipe support, comprising: the lantern ring that sets for the position by two relative articulations of semicircle body and lockable at the pipeline outer wall, circumference interval is provided with a plurality of elastic support piece on the lantern ring, and all is provided with universal ball on every elastic support piece.
3. The production process of the prefabricated directly-buried heat-insulating pipe according to claim 2, wherein two ends of the two platforms are connected through a screw rod adjusting assembly;
the lead screw adjusting assembly comprises: the screw rods are respectively arranged on the two table bodies and are in threaded connection with the nuts;
the screw thread directions of the nuts of the two table bodies are opposite, and the end part of the screw lever is connected with a driving assembly.
4. The production process of the prefabricated directly-buried heat-insulating pipe as claimed in claim 2, wherein the two tables are supported by supporting legs equipped with universal casters, and the universal casters are equipped with trample brakes thereon.
5. The production process of the prefabricated directly-buried heat-insulating pipe as claimed in claim 2, wherein each platform body is provided with an assembly groove along the width direction thereof, and a moving block is connected to the interior of the assembly groove through the elastic driving member;
the deviation-correcting plate is hinged with the corresponding moving block through a limiting shaft.
6. The prefabricated direct-burial thermal insulation pipe production process according to claim 5, wherein the elastic driving member comprises: the springs are arranged at two ends of the assembling groove, and the two opposite sides of the moving block are provided with limiting grooves matched with the corresponding springs.
7. The production process of the prefabricated directly-buried heat-insulating pipe as claimed in any one of claims 2 to 6, wherein the radian directions of the deviation-correcting plates on the two platforms face each other.
8. The production process of the prefabricated directly-buried heat-insulating pipe as claimed in claim 2, wherein the two semi-circular bodies are hinged through a rotating shaft, and one ends of the two semi-circular bodies, far away from the rotating shaft, are locked and closed through bolts.
9. The production process of the prefabricated directly-buried heat-insulating pipe as claimed in claim 2, wherein the inner wall of the lantern ring is provided with an anti-skid layer.
10. The production process of the prefabricated directly-buried heat-insulating pipe as claimed in claim 9, wherein an installation groove for assembling the elastic supporting member is formed in the circumferential direction of the outer wall of the lantern ring;
the elastic support member includes: the two rod bodies are connected in the mounting groove in a relatively sliding mode, and a tension spring for connecting the two rod bodies is arranged in the mounting groove;
the top of the two rod bodies is hinged with a supporting block, and a limiting groove corresponding to the universal ball matched with the universal ball is formed in the supporting block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111231373.6A CN113977842B (en) | 2021-10-22 | 2021-10-22 | Production process of prefabricated directly-buried thermal insulation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111231373.6A CN113977842B (en) | 2021-10-22 | 2021-10-22 | Production process of prefabricated directly-buried thermal insulation pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113977842A true CN113977842A (en) | 2022-01-28 |
| CN113977842B CN113977842B (en) | 2023-03-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115782024A (en) * | 2023-02-02 | 2023-03-14 | 秦皇岛市牧热防腐保温工程有限公司 | Prefabricated direct-burried insulating tube suit apparatus for producing |
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| US4206164A (en) * | 1978-10-25 | 1980-06-03 | Owens-Corning Fiberglas Corporation | Method and apparatus for maintaining the concentricity of a molded pipe |
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| CN213264912U (en) * | 2020-06-17 | 2021-05-25 | 福州汇腾塑胶有限公司 | PVC pipe production is with preventing off tracking device |
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| CN214358539U (en) * | 2021-02-25 | 2021-10-08 | 湖北万福祥米业有限公司 | Spill-proof rice bin-dividing conveying device |
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| CN208698609U (en) * | 2018-08-24 | 2019-04-05 | 昆山浩联锐科自动化设备有限公司 | A kind of heavy type round tube transport automatic guided vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115782024A (en) * | 2023-02-02 | 2023-03-14 | 秦皇岛市牧热防腐保温工程有限公司 | Prefabricated direct-burried insulating tube suit apparatus for producing |
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|---|---|
| CN113977842B (en) | 2023-03-21 |
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Denomination of invention: A Production Process for Prefabricated Directly Buried Insulation Pipe Granted publication date: 20230321 Pledgee: Bank of China Limited by Share Ltd. Cangzhou branch Pledgor: Hebei Qianhai pipeline Manufacturing Co.,Ltd. Registration number: Y2024980011977 |