CN114953316A - Heat-insulating pipe manufacturing method based on cyclopentane foaming process - Google Patents
Heat-insulating pipe manufacturing method based on cyclopentane foaming process Download PDFInfo
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- CN114953316A CN114953316A CN202210596670.9A CN202210596670A CN114953316A CN 114953316 A CN114953316 A CN 114953316A CN 202210596670 A CN202210596670 A CN 202210596670A CN 114953316 A CN114953316 A CN 114953316A
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- pipe
- plug
- heat preservation
- electric lead
- manufacturing
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- 238000005187 foaming Methods 0.000 title claims abstract description 66
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 25
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000004321 preservation Methods 0.000 claims abstract description 45
- 239000004088 foaming agent Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 13
- 210000000078 claw Anatomy 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 5
- 238000005536 corrosion prevention Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 description 6
- 230000007306 turnover Effects 0.000 description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 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
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
- B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
-
- 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
-
- 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
- B29C44/3442—Mixing, kneading or conveying the foamable material
-
- 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
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
Landscapes
- Thermal Insulation (AREA)
Abstract
The invention provides a heat-insulating pipe manufacturing method based on a cyclopentane foaming process, which comprises the following steps; s1: mounting a supporting device on the periphery of the inner pipe, and enabling the electric lead to pass through the electric lead through groove on the supporting device; s2: filling a foaming agent between the inner pipe and the outer pipe to enable the electric lead to be embedded into a foaming layer formed after the foaming agent expands; s3: replacing the pipe plug adjusting device on the pipe plug, and manufacturing the heat preservation pipe of the next batch; the laying of the electric wire pipe is completed while the heat preservation pipe is laid, the workload of workers is reduced, heat preservation and corrosion prevention treatment is already carried out on the heat preservation pipe during the manufacturing process, and the whole construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of positive and negative pressure distribution, in particular to a heat-insulating pipe manufacturing method based on a cyclopentane foaming process.
Background
The heat preservation pipe comprises an inner pipe and an outer pipe, a foaming layer is filled between the inner pipe and the outer pipe, when the heat preservation pipe is laid, the heat preservation pipe and an electrified electric lead are required to be installed together, and the current installation mode is adopted; after the insulating pipe is laid, a small-diameter electric wire pipe is laid above the insulating pipe, and then an electrified electric lead is penetrated into the electric wire pipe, but the mode has the following defects:
firstly, the constructors need to lay pipelines twice, and the workload is large;
secondly, the electric wire pipes laid underground also need to be subjected to heat preservation and corrosion prevention treatment, and the whole construction cost is high.
In addition, in the process of sleeving the inner pipe and the outer pipe, the coaxiality deviation of the inner pipe and the outer pipe has a clear requirement, besides the misoperation of workers during sleeving, the deformation of the inner pipe or the outer pipe is also an important factor causing the coaxiality deviation to exceed a threshold value, for example, the patent of publication (publication) No. CN206069199U discloses a transfer and transportation device for the heat preservation pipe, which is used for transferring the heat preservation pipe, the device drives a pressing piece to descend through a cylinder, the pressing piece presses the heat preservation pipe, and a lifting platform is hung by a lifting machine to lift and transfer the heat preservation pipe.
Disclosure of Invention
In view of the above, the present invention provides a method for manufacturing a heat preservation pipe based on a cyclopentane foaming process.
In order to solve the technical problems, the invention adopts the technical scheme that
A heat preservation pipe manufacturing method based on a cyclopentane foaming process comprises the following steps;
s1: mounting a supporting device on the outer peripheral surface of the inner pipe, and enabling the electric lead to pass through the electric lead through groove on the supporting device;
s2: filling a foaming agent between the inner pipe and the outer pipe to enable the electric lead to be embedded into a foaming layer formed after the foaming agent expands;
s3: and replacing the pipe plug adjusting device on the pipe plug, and manufacturing the heat preservation pipe of the next batch.
The step S1 is:
after the bandage of the supporting device is tightly bound on the periphery of the inner tube, the inner tube is sleeved into the outer tube in a penetrating manner and the pipe plug is installed, and the reserved lengths at the two ends of the electric lead can be at least abutted to the pipe plug.
The step S2 is:
and inserting the material injection pipe into the material injection hole for material injection, and plugging the material injection hole by using a PE plug after the material injection is finished.
The step S3 is:
and replacing the pipe plug adjusting device on the pipe plug, and continuously using the pipe plug to plug the heat preservation pipe of the next batch.
The supporting device comprises supporting bodies and a binding belt, wherein the supporting bodies are connected in series on the binding belt, and the supporting bodies are provided with electric lead through grooves for penetrating electric leads.
Along the length direction of the electric lead through groove, the top surface and the bottom surface of the support body are respectively provided with a strip-shaped upper convex part and a strip-shaped lower convex part, and the end surfaces of the inlet and the outlet of the electric lead through groove are provided with guide reinforcing claws.
The pipe plug adjusting device comprises an exhaust part, the middle of the exhaust part sinks to form a buffer cavity, an exhaust runner extending along the axial direction of the exhaust part is arranged at the bottom of the exhaust part, the buffer cavity is communicated with the exhaust runner, a limiting part used for abutting against the pipe plug is further fixedly arranged on the periphery of the exhaust part, the exhaust part is matched with an exhaust hole in the pipe plug, and the diameter of the limiting part is larger than that of the exhaust hole.
A transportation method of a heat preservation pipe based on a cyclopentane foaming process comprises the following steps;
c1: conveying the inner pipe or the outer pipe to one side of the processing frame by using a conveying mechanism;
c2: and the inner pipe or the outer pipe is turned over from the conveying mechanism to the processing frame by using the turning mechanism.
The invention has the advantages and positive effects that:
(1) before foaming agent is not filled, the electric lead is placed into a foaming reserved cavity between the inner pipe and the outer pipe by utilizing an electric lead through groove reserved by the supporting device, the foaming agent is filled into the foaming reserved cavity, so that the electric lead is embedded into a foaming layer formed after the foaming agent is expanded and cured, in the process, the position of the electric lead is limited by the supporting device, the electric lead is prevented from displacing along with the expansion of the foaming agent, the two ends of the electric lead are completely embedded into the foaming layer, and workers cannot find electric lead heads on the two end surfaces of the foaming layer; therefore, the hollow interior of the foaming layer is avoided, the laying of the electric wire pipe is completed while the heat preservation pipe is laid, the workload of workers is reduced, heat preservation and corrosion prevention treatment is already carried out on the heat preservation pipe during the manufacturing process, and the whole construction cost is reduced.
(2) Adopt the transport mode of upset inner tube or outer tube, be difficult for appearing the phenomenon that inner tube or outer tube drop, also need not fasten inner tube or outer tube at the in-process of upset moreover, reduced the risk that makes inner tube or outer tube take place the deformation because of stress.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a block diagram of a support device;
FIG. 2 is a schematic view of the inner tube being nested within the outer tube after the support means has been added to the inner tube;
FIG. 3 is a schematic view of a pipe plug and a pipe plug adjustment device
Fig. 4 is a schematic view of the pipe blockage adjustment device at a first viewing angle;
fig. 5 is a schematic view of the pipe blockage adjusting device at a second viewing angle;
fig. 6 is a schematic view of a pipe plug moving rack and a pipe plug;
FIG. 7 is a schematic view of a support frame and turning rollers;
FIG. 8 is a schematic view of a chain conveyor;
in the figure: the device comprises an inner tube 21, an outer tube 22, a support part 31, a guide limiting part 32, a limiting part 33, a processing frame 35, a support body 41, a binding band 42, an electric lead through groove 43, an upper convex part 44, a lower convex part 45, a reinforcing claw 46, a chain transmission belt 51, a support frame 52, a rotating roller 53, a pipe plug 6, an exhaust hole 61, a pipe plug lug 63, a lug hole 64, a mounting hole 65, a pipe plug moving frame 66, an exhaust part 11, a limiting part 12, a buffer cavity 13, an exhaust flow channel 14, a threaded hole 92 and a foaming reserved cavity 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a heat-insulating pipe manufacturing method based on a cyclopentane foaming process, which adopts the technical idea that: before the foaming layer is not filled, the electric lead is placed into the foaming reserved cavity 10 between the inner pipe and the outer pipe, the foaming agent is filled into the foaming reserved cavity 10, the electric lead is embedded into the foaming layer formed after the foaming agent expands and solidifies (in the process, the position of the electric lead needs to be limited, the electric lead is prevented from displacing along with expansion of the foaming agent, the foaming layer is completely embedded into two ends of the electric lead, and workers cannot find electric lead heads on two end surfaces of the foaming layer), so that the inner part of the foaming layer is not hollow, the laying of the electric lead pipe is completed while the heat preservation pipe is laid, the workload of the workers is reduced, heat preservation and corrosion prevention treatment is already carried out on the heat preservation pipe during the manufacturing, and the whole construction cost is reduced.
Specifically, the method comprises the following steps;
s1: mounting a supporting device on the outer peripheral surface of the inner pipe, and enabling the electric lead to pass through the electric lead through groove on the supporting device;
the supporting device comprises a supporting body 41 and a binding band 42, a plurality of the supporting bodies 41 are connected in series on the binding band 42, an electric lead through groove 43 for penetrating an electric lead is arranged on the supporting body 41, a plurality of supporting devices are tightly bound on the periphery of the inner pipe 21, the electric lead through groove 43 of each supporting body 41 can be used as a limiting supporting point of the electric lead, a guide is arranged along the axial direction of the inner pipe 21, the movement of the electric lead is limited by the electric lead through groove 43, strip-shaped upper convex parts 44 and strip-shaped lower convex parts 45 are respectively arranged on the top surface and the bottom surface of the supporting body 41 along the length direction of the electric lead through groove 43, the upper convex parts 44 and the lower convex parts 45 are used for filling the distance between the supporting body 41 and the outer pipe 22, the inner pipe 21 and the outer pipe 22 after the supporting devices are bound are coaxial, a gap is left between each group of the upper convex parts 44 or the lower convex parts 45, a foaming layer can be filled in the gap, and guide reinforcing claws 46 are arranged on the end surfaces of the inlet and the outlet of the electric lead through groove 13, the end face of the guiding reinforcing claw 46 is designed to be a slope, so that a foaming layer can better wrap the supporting body 41, the connection strength between the foaming layer and the supporting body 41 is increased, the tightness between the upper convex part 44, the lower convex part 45, the foaming layer, the inner tube 21 and the outer tube 22 is further increased, in addition, when the inner tube 21 is sleeved in or separated from the outer tube 22, the guiding reinforcing claw 46 and the upper convex part 44 can play a guiding role together, the supporting device can increase or decrease according to the length of the inner tube 21, after the binding band 42 is tightly bound on the periphery of the inner tube 21, an electric lead passes through a reserved electric lead through groove 43 of the supporting device, then the inner tube 21 is sleeved in the outer tube 22, the supporting device can form a foaming layer reserved cavity 10 for manufacturing the foaming layer between the inner tube 21 and the outer tube 22, and the binding band 42 is tightly bound on the inner tube 21, so that the supporting body 41 cannot generate displacement along with the expansion of the foaming agent, the displacement of the electric lead is avoided, after the inner tube 21 and the outer tube 22 are sleeved, the tube plug 6 is arranged at two ends of the inner tube 21, the reserved length at two ends of the electric lead can at least abut against the tube plug 6, so that after a foaming layer is formed, the wire ends of the electric lead can still be found at two ends of the foaming layer, the inner side area and the outer side area of the protruding part on the tube plug 6 are respectively sleeved on the inner tube 21 and the outer tube 22 with two different sizes, the end surface of the tube plug 6 and the axial direction of the inner tube 21 and the outer tube 22 are both provided with connecting threaded holes, the end surface of the tube plug 6 and the axial connecting threaded holes 92 of the inner tube 21 and the outer tube 22 are sequentially connected through fastening bolts, the fastening of the tube plug 6 and the inner tube 21 and the outer tube 22 with two different sizes are realized, the area formed between the inner tube 21 and the outer tube 22 is the foaming reserved cavity 10, the outer tube 22 with a material injection hole is arranged on the outer tube 22 with a large diameter, and foaming agent is injected into the foaming reserved cavity 10 through the material injection hole, the foaming layer is manufactured, pipe plugging lugs 63 are arranged on two sides of the pipe plug 6, lug holes 64 of the pipe plugging lugs 63 correspond to mounting holes 65 on a pipe plug moving frame 66, the lug holes 64 and the mounting holes 65 are connected with nuts in a threaded mode after being penetrated through by bolts, the pipe plug moving frame 66 is connected with the pipe plug 6, and the pipe plug moving frame 66 is fixedly mounted on a lifting trolley and used for driving the pipe plug 6 to move to the corresponding positions of the inner pipe 21 and the outer pipe 22.
It should be noted that, in another embodiment of the present invention, a longer electrical lead is tried to be placed into the foaming pre-chamber 10, but the electrical lead has a larger displacement along with the expansion of the foaming agent, so that the electrical lead remained in the foaming pre-chamber 10 is too long, which reduces the overall structural stability of the insulating pipe, and the electrical lead not entering the foaming pre-chamber 10 needs to be cut to a proper butt length, otherwise, the electrical leads need to be separately laid with electrical pipes, and the length of the insulating pipe is tens of meters, which greatly increases the construction cost.
Specifically, when the inner tube 21 is placed, the parts of the inner tube 21 exposed at the two ends of the outer tube 22 are exposed uniformly, and the exposed length is 160mm-240 mm;
the specification of the support body 41 is selected according to the inner diameter of the outer pipe 22, the gap between the support body 41 and the outer pipe 22 is not more than 1.5mm, the support body 1 is uniformly placed in the circumferential direction of the inner pipe 21, and the maximum circumferential distance is less than or equal to 200 mm;
specifically, the internal tube 21 both ends start and end support 41 apart from the internal tube 21 end 400mm, and support 41 carries out effectively spacingly to the end of electric lead, and the reserved length at electric lead both ends offsets with blocking up 6 at least, can prevent that the electric lead end from burying the foaming layer completely, and the interval between the adjacent strutting arrangement is shown below, and pulling force that can the homodisperse foamer inflation production avoids causing the electric lead to damage.
The direction of the guide fins of the support body 41 is consistent with the direction of the conveying pipe, and 4-5 wood support devices are adopted for the inner pipe 21 with the diameter of larger than or equal to 1200mm due to larger mass.
Specifically, after the pipe plug 6 is installed, two ends of the inner pipe 21 are uniformly exposed within the range of 150-220mm, the maximum error of the two ends does not exceed 40mm, and the coaxiality deviation of the inner pipe 21 and the outer pipe 22 is shown in the following table;
| outer tube outside Diameter (DC) | Deviation in thickness | Unit of |
| 400＜DC≤630 | ±6 | mm |
| 630＜DC≤800 | ±8 | mm |
| 800＜DC≤1400 | ±10 | mm |
| 1400＜DC≤1700 | ±12 | mm |
S2: a foaming layer is formed by injecting a foaming agent between the inner tube 21 and the outer tube 22 and embedding the electric wires in the foaming layer formed by expanding the foaming agent;
in the prior art, the pipe plug of the thermal insulation pipe is provided with an exhaust hole for exhausting air in a thermal insulation space in the foaming process, for example, a directly-buried thermal insulation pipeline pipe plug, a system and a method for sealing the end surface of the directly-buried thermal insulation pipe with the application number of CN202010266015.8, but the existing pipe plug exhaust hole design has the following defects that the exhaust hole is arranged on the pipe plug, the exhaust amount of the exhaust hole per unit time cannot be changed according to the characteristics of foaming agent, in addition, after the foaming layer is manufactured each time, the exhaust hole is filled with foaming agent, the solidified foaming agent left in the exhaust hole needs to be removed before the foaming layer is manufactured again, but because the difficulty angle of cleaning is adopted, the mode of replacing the pipe plug is mostly adopted, the workload of workers is increased, the production efficiency of the product is reduced, so in the embodiment, the pipe plug 6 with a pipe plug adjusting device is adopted for the inner pipe 21 and the outer pipe 22, after the foaming layer is manufactured, the pipe plug adjusting device is replaced with a new pipe plug adjusting device, and the exhaust hole does not need to be cleaned or the pipe plug 6 with larger mass does not need to be replaced.
Specifically, the pipe plug adjusting device comprises an exhaust part 11 for discharging gas in a foaming layer, the middle part of the exhaust part 11 sinks to form a buffer cavity 13, an exhaust runner 14 extending along the axial direction of the exhaust part 11 is arranged at the bottom of the exhaust part 11, and the buffer cavity 13 is communicated with the exhaust runner 14; the buffer cavity 13 is used for buffering the gas from the foaming layer, so that the gas from the foaming reserved cavity 10 is uniformly distributed to the exhaust runners 14, each exhaust runner 14 is uniformly exhausted, the pipe plug adjusting device can be made into various types according to the diameter change of the exhaust runners 14, and the requirements of different exhaust amounts in unit time can be met by replacing pipe plug adjusting devices of the exhaust runners 14 with different diameters; the peripheral surface of the exhaust part 11 is smooth so as to reduce the damping generated when the exhaust part 11 is inserted into the exhaust hole 61 of the pipe plug 6; the periphery of the exhaust part 11 is fixedly provided with a limiting part 12, the exhaust part 11 is matched with the exhaust hole 61 on the pipe plug 6, so that the exhaust part 11 can be inserted into the exhaust hole 61, the diameter of the limiting part 12 is larger than that of the exhaust hole 61 and is used for abutting against the pipe plug 6, and the phenomenon that the diameter of the pipe plug adjusting device slides out of the other end of the exhaust hole 61 due to overlarge force when the pipe plug adjusting device is installed is avoided;
specifically, the temperature of the foaming agent raw material is 20-28 ℃, and the temperature of the raw material is adjusted according to the environment temperature, the temperature of the pipe and the pipe diameter;
specifically, the injection pressure of the high-pressure foaming machine is 100-150 bar;
specifically, the proportion of high-sintering and original polyether is correspondingly adjusted by technologists according to the requirements of raw material manufacturers on process, season and the like, wherein the weight of the polyether is 100 (5-13.5);
specifically, a material injection pipe is inserted into a material injection hole for injecting materials, the material injection hole is sealed by a PE plug after the materials are injected, and PE hot-melt plug welding is adopted after a finished product pipe is transported out of a processing workshop;
specifically, plugging materials are adopted to plug all foam leakage parts (except for the vent hole 61)
After foams are seen in the air vents 61, the standing time of DN not less than 800 is not less than 10 minutes, the standing time of DN not less than 1200 and not more than 900 is not less than 15 minutes, and the standing time of DN >1400 is not less than 25 minutes. The rest time is properly adjusted according to the season and the pipe diameter, and the condition of not running the pipe plug 6 is taken as the standard. When the temperature of the workshop environment is low, the standing time is properly prolonged; DN is the diameter of the inner tube.
S3: replacing the pipe plug adjusting device on the pipe plug, and manufacturing the heat preservation pipe of the next batch;
when a group of foaming layers are manufactured, the pipe plug adjusting device can be pulled out, a new pipe plug adjusting device is replaced, the foaming agent solidified in the exhaust hole 61 does not need to be cleaned one by one or the new pipe plug 6 does not need to be replaced, then the next group of heat preservation pipe foaming layers are manufactured rapidly, the production efficiency of products is accelerated, and the work of workers is also reduced.
Further, as for the condition that the coaxiality deviation exceeds a threshold value due to deformation of an inner pipe or an outer pipe caused by hoisting and carrying in the prior art, the invention also provides a heat-insulating pipe transferring method based on a cyclopentane foaming process, which comprises the following steps;
c1: before the foaming process, conveying the inner pipe or the outer pipe to one side of the processing frame by using a conveying mechanism;
specifically, the conveying mechanism can adopt a chain conveying belt 51, and can also adopt a support frame 52 and a rotating roller 53, two ends of the rotating roller 53 are installed on the support frame 52 through a connecting bearing, the rotating roller 53 is of an hourglass structure, the rotating roller 53 with the hourglass structure limits the radial movement of the heat preservation pipe, the rotating roller 53 can not be connected with a driving source, and after the heat preservation pipe is placed on the rotating roller 53, the heat preservation pipe is manually pushed in the axial direction of the heat preservation pipe, so that the heat preservation pipe is applicable to the outer pipe 22 with lighter weight in the heat preservation pipe.
C2: the inner tube or the outer tube is turned over from the conveying mechanism onto the processing frame 35 by the turning mechanism.
Specifically, the turnover mechanism comprises a support part 31, a guide limiting part 32 and a limiting part 33, wherein the support part 31 is horizontally arranged relative to the guide limiting part 32 and the limiting part 33 and is used for bearing the heat preservation pipe, the limiting part 33 is arranged at one end of the support part 31 far away from the processing frame 35, the guide limiting part 32 is arranged at one end of the support part 31 close to the processing frame 35 and is hinged with the processing frame, the end surface of the guide limiting part 32 opposite to the limiting part 33 inclines along the direction far away from the support part 31 to form a slope structure, when the turnover mechanism is horizontally arranged, the slope structure can enable the turnover mechanism to be adapted to the heat preservation pipes with different calibers, the guide limiting part 32 and the limiting part 33 mutually support against the periphery of the heat preservation pipe to limit the radial rotation of the heat preservation pipe, when the turnover mechanism is acted by a driving mechanism, the end surface of the slope structure of the guide limiting part 32 plays a guide role in guiding the heat preservation pipe, the heat-insulating pipe rolls onto the conveying frame 35 under the action of the self-weight.
Specifically, the driving mechanism is fixedly arranged on the mounting seat, the mounting seat is rotatably connected with the processing frame 35, the output end of the driving mechanism is rotatably connected with the turnover mechanism, and the driving mechanism comprises an electric cylinder and an air cylinder 36 and can be selectively used according to the use working condition.
The working principle and the working process of the invention are as follows:
s1: tightly binding a binding band of the supporting device on the periphery of the inner tube, enabling the electric lead to pass through an electric lead through groove on the supporting device, enabling the inner tube to penetrate and be sleeved into the outer tube and installing a pipe plug, wherein the reserved length of two ends of the electric lead can at least abut against the pipe plug;
specifically, when the inner tube 21 is placed, the parts of the inner tube 21 exposed at the two ends of the outer tube 22 are exposed uniformly, and the exposed length is 160mm-240 mm;
the specification of the support body 41 is selected according to the inner diameter of the outer pipe 22, the gap between the support body 41 and the outer pipe 22 is not more than 1.5mm, the support body 1 is uniformly placed in the circumferential direction of the inner pipe 21, and the maximum circumferential distance is less than or equal to 200 mm;
specifically, the distance between the starting and stopping support bodies 41 at the two ends of the inner pipe 21 and the end of the inner pipe 21 is 400mm, the distance between the adjacent support devices is shown in the following table, the direction of the guide fins of the support bodies 41 is consistent with the direction of the conveying pipe, and 4-5 wood support devices are adopted for the inner pipe 21 with the diameter larger than or equal to 1200mm due to large mass.
S2: filling a foaming agent between the inner pipe and the outer pipe to enable the electric lead to be embedded into a foaming layer formed after the foaming agent expands;
specifically, the temperature of the foaming agent raw material is 20-28 ℃, and the temperature of the raw material is adjusted according to the environment temperature, the temperature of the pipe and the pipe diameter;
specifically, the injection pressure of the high-pressure foaming machine is 100-150 bar;
specifically, the proportion of high-sintering and original polyether is correspondingly adjusted by technologists according to the requirements of raw material manufacturers on process, season and the like, wherein the weight of the polyether is 100 (5-13.5);
specifically, a material injection pipe is inserted into a material injection hole for injecting materials, the material injection hole is sealed by a PE plug after the materials are injected, and PE hot-melt plug welding is adopted after a finished product pipe is transported out of a processing workshop;
specifically, plugging materials are adopted to plug all foam leakage parts (except the vent holes 61)
After foams are seen in the air vents 61, the standing time of DN not less than 800 is not less than 10 minutes, the standing time of DN not less than 1200 and not more than 900 is not less than 15 minutes, and the standing time of DN >1400 is not less than 25 minutes. The rest time is properly adjusted according to the season and the pipe diameter, and the condition of not running the pipe plug 6 is taken as the standard. When the temperature of the workshop environment is low, the standing time is properly prolonged; DN is the diameter of the inner tube;
s3: and when a group of foaming layers are manufactured, pulling out the pipe plug adjusting device, replacing the pipe plug adjusting device with a new pipe plug adjusting device, and manufacturing the heat preservation pipe of the next batch.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (8)
1. A heat preservation pipe manufacturing method based on a cyclopentane foaming process is characterized by comprising the following steps;
s1: mounting a support device on the periphery of the inner tube, and enabling the electric lead to pass through the electric lead through groove on the support device;
s2: filling a foaming agent between the inner pipe and the outer pipe to enable the electric lead to be embedded into a foaming layer formed after the foaming agent expands;
s3: and replacing the pipe plug adjusting device on the pipe plug.
2. The method for manufacturing the heat preservation pipe based on the cyclopentane foaming process as claimed in claim 1, wherein the step S1 is:
after the binding band of the supporting device is tightly bound on the periphery of the inner tube, the inner tube is sleeved into the outer tube and the pipe plug is installed, and the reserved lengths at the two ends of the electric lead can be at least abutted against the pipe plug.
3. The method for manufacturing the heat preservation pipe based on the cyclopentane foaming process as claimed in claim 1, wherein the step S2 is:
and inserting the material injection pipe into the material injection hole for material injection, and plugging the material injection hole by using a PE plug after the material injection is finished.
4. The manufacturing method of the heat preservation pipe based on the cyclopentane foaming process as claimed in claim 1, wherein the step S3 is:
and replacing the pipe plug adjusting device on the pipe plug, and continuously using the pipe plug to plug the heat preservation pipe of the next batch.
5. The manufacturing method of the heat preservation pipe based on the cyclopentane foaming process is characterized in that the supporting device comprises a supporting body and a binding belt, a plurality of the supporting bodies are connected in series on the binding belt, and the supporting body is provided with an electric lead through groove for penetrating an electric lead.
6. The manufacturing method of the heat preservation pipe based on the cyclopentane foaming process is characterized in that along the length direction of the electric lead through groove, the top surface and the bottom surface of the support body are respectively provided with a strip-shaped upper convex part and a strip-shaped lower convex part, and the end surfaces of the inlet and the outlet of the electric lead through groove are provided with guide reinforcing claws.
7. The manufacturing method of the heat-insulating pipe based on the cyclopentane foaming process is characterized in that the pipe plug adjusting device comprises an exhaust part, the middle of the exhaust part sinks to form a buffer cavity, an exhaust channel extending along the axial direction of the exhaust part is formed in the bottom of the exhaust part, the buffer cavity is communicated with the exhaust channel, a limiting part used for abutting against the pipe plug is fixedly arranged on the periphery of the exhaust part, the exhaust part is matched with an exhaust hole in the pipe plug, and the diameter of the limiting part is larger than that of the exhaust hole.
8. The manufacturing method of the heat preservation pipe based on the cyclopentane foaming process is characterized in that the outer pipe and the inner pipe are carried in an overturning way, and the method comprises the following steps;
c1: conveying the inner pipe or the outer pipe to one side of the processing frame by using a conveying mechanism;
c2: and the inner pipe or the outer pipe is turned over from the conveying mechanism to the processing frame by using the turning mechanism.
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| CN202210596670.9A CN114953316B (en) | 2022-05-17 | 2022-05-17 | Heat preservation pipe manufacturing method based on cyclopentane foaming process |
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| CN202210596670.9A CN114953316B (en) | 2022-05-17 | 2022-05-17 | Heat preservation pipe manufacturing method based on cyclopentane foaming process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116001338A (en) * | 2023-03-28 | 2023-04-25 | 中油智科(吉林)技术装备有限公司 | Manufacturing process of glass fiber reinforced plastic pipeline outer heat insulation layer and anticorrosive layer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615977A (en) * | 1968-08-08 | 1971-10-26 | Kabel Metallwerke Ghh | Method of insulating coaxial tubing systems |
| CN104633376A (en) * | 2015-01-30 | 2015-05-20 | 唐山丰南君业节能保温材料有限公司 | Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method |
| KR20150057300A (en) * | 2013-11-19 | 2015-05-28 | 대주이엔티 주식회사 | Method for manufacturing double insulation pipe and polyurethane foam composition for double insulation pipe |
| CN216506349U (en) * | 2021-10-29 | 2022-05-13 | 中石化石油工程技术服务有限公司 | Heat preservation foaming device of polyurethane foaming insulating tube |
-
2022
- 2022-05-17 CN CN202210596670.9A patent/CN114953316B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615977A (en) * | 1968-08-08 | 1971-10-26 | Kabel Metallwerke Ghh | Method of insulating coaxial tubing systems |
| KR20150057300A (en) * | 2013-11-19 | 2015-05-28 | 대주이엔티 주식회사 | Method for manufacturing double insulation pipe and polyurethane foam composition for double insulation pipe |
| CN104633376A (en) * | 2015-01-30 | 2015-05-20 | 唐山丰南君业节能保温材料有限公司 | Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method |
| CN216506349U (en) * | 2021-10-29 | 2022-05-13 | 中石化石油工程技术服务有限公司 | Heat preservation foaming device of polyurethane foaming insulating tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116001338A (en) * | 2023-03-28 | 2023-04-25 | 中油智科(吉林)技术装备有限公司 | Manufacturing process of glass fiber reinforced plastic pipeline outer heat insulation layer and anticorrosive layer |
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| CN114953316B (en) | 2024-02-23 |
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