CN104633376A - Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method - Google Patents
Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method Download PDFInfo
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- CN104633376A CN104633376A CN201510047227.6A CN201510047227A CN104633376A CN 104633376 A CN104633376 A CN 104633376A CN 201510047227 A CN201510047227 A CN 201510047227A CN 104633376 A CN104633376 A CN 104633376A
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- thermal insulation
- closure plate
- prefabricated direct
- foaming
- thermal insulating
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Classifications
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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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/124—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced radially into the pipe or hose
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a prefabricated direct-buried thermal insulating pipe foaming plugging device and a usage method, and belongs to the technical field of prefabricated direct-buried thermal insulating pipes. The prefabricated direct-buried thermal insulating pipe foaming plugging device and the usage method are used for solving the problem existing in prefabricated direct-buried thermal insulating pipe foaming. According to the technical scheme, the two ends of a thermal insulating layer are each provided with a plugging plate, each plugging plate is provided with a pressure regulator, and flexible sealing rings are arranged between the plugging plates and an outer protecting pipe and between the plugging plates and the working steel pipe. The usage method comprises the steps that the plugging plates are used for sealing the two ends of an annular cavity of the thermal insulating layer, the pressure regulators are used for regulating the pressure in the annular cavity of the thermal insulating layer, and then pouring and foaming are performed to enable polyurethane to be fully foamed in the whole cavity. The prefabricated direct-buried thermal insulating pipe foaming plugging device is simple in sructure, convenient to use, good in sealing effect, capable of regulating the pressure, and not only can prevent the occurrence of the structural defects of polyurethane foaming, but also can avoid material spilling and reduce production cost. The prefabricated direct-buried thermal insulating pipe foaming plugging device and the usage method solve the problems which are not solved for a long time in prefabricated direct-buried thermal insulating pipe foaming technology, ensure the product quality of the prefabricated direct-buried thermal insulating pipe, and have remarkable economic benefits.
Description
Technical field
The present invention relates to a kind of plugging device and the using method that are applicable to the use of prefabricated direct-buried thermal insulation pipe foam process, belong to prefabricated direct-buried thermal insulation pipe technical field.
Background technique
Prefabricated direct-buried thermal insulation pipe is widely used in the transmission pipeline network of liquid, gas, and existing prefabricated direct-buried thermal insulation pipe foam process is: poling-preheating-upper pipe plug-pouring foaming-tear pipe plug-Checking of finished products open.There is poorly sealed problem in current pipe plug and steel pipe and the outer pillar of PE, solving poorly sealed problem measure is add cover seal ring on the working steel tube external diameter of prefabricated direct-buried thermal insulation pipe, but after adding cover seal ring, cavity air pressure between working steel tube and PE oversheath cannot be got rid of, after causing building polyurethane in cavity, polyurethane combined material flowing is restricted, and cannot be full of whole cavity, and then cause polyurethane insulation coating to there is structural imperfection.In order to solve the problem regulating chamber pressure, often adopt artificial mode in the end boring of the outer pillar of PE, air in release cavity, regulate chamber pressure, ensure polyurethane insulation coating foaming fully, but adopt the mode of artificial boring often to cause the outer pillar structural failure of PE, add the possibility of cavity water inlet.In order to solve the problem, Chinese patent CN 103062576 A discloses a kind of plugging device of foam heat-preservation pipe, and this blocking device serves good seal action, but cannot solve the problem regulating cavity internal pressure; Chinese patent CN 201844159 U discloses a kind of foaming blocking cover of polyurethane foaming heat insulating pipe, this blanking cover has the exhaust port of multiple through front/rear end, sealed groove is provided with inside blanking cover, there is the function of shutoff, exhaust, but due to the process that polyurethane foam process is a liquid curing, there is the problem of polyurethane by exhaust port " race material " in the process of solidification; Chinese patent CN 203637080 U discloses a kind of prefabricated direct-buried thermal insulation pipe high density polyurethane foam and strengthens mould, this fixture is in lid shape, clamp top has running-on, material feeding port and one group of exhaust port, but this fixture is only suitable for for adopting accurate cutting equipment to cut the outer pillar of rear PE, application is very limited, and exhaust port is without blocking device, there is the problem of " running material ".
In sum, in the production of prefabricated direct-buried thermal insulation pipe, polyurethane foam how is made to foam at the good insulating structure of maintenance simultaneously, the aspect Problems existing such as sealing, adjustment pressure, " running material " can be overcome do not obtain so far thoroughly effectively solving, become the production of current prefabricated direct-buried thermal insulation pipe and the difficult problem in using, be necessary to carry out brand-new design and improvement to blocking device and using method.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of prefabricated direct-buried thermal insulation pipe foaming plugging device and using method, operation is very easy for this plugging device, can effectively solve the flowing of poorly sealed in prefabricated direct-buried thermal insulation pipe foaming process, premixed systems obstructed, run the problems such as material, thermal insulation layer quality can be kept simultaneously, ensure the heat insulation effect of thermal insulation pipe.
The technological scheme solved the problems of the technologies described above is:
A kind of prefabricated direct-buried thermal insulation pipe foaming plugging device, it is by closure plate, pressure regulator, inner ring flexible seal ring, outer shroud flexible seal ring forms, closure plate is annular slab, closure plate is arranged on the two ends of thermal insulation layer respectively, the outer circumference diameter of closure plate and the internal diameter of outer pillar match, the diameter of bore of closure plate and the external diameter of working steel tube match, the outer peripheral surface of closure plate and inner ring surface are respectively by inner ring flexible seal ring, the inwall of outer shroud flexible seal ring and outer pillar and the outer wall compact siro spinning technology of working steel tube, pressure regulator is arranged on closure plate, thermal insulation layer inner chamber body inside closure plate is connected with ambient atmosphere by pressure regulator.
Above-mentioned prefabricated direct-buried thermal insulation pipe foaming plugging device, the front portion of the excircle of described closure plate is taper, and tapered outer ends face is relative with thermal insulation layer, the ear end face of closure plate has 4-6 tapped blind hole, and 4-6 tapped blind hole is uniformly distributed along closure plate ear end face annular circumferential.
Above-mentioned prefabricated direct-buried thermal insulation pipe foaming plugging device, described pressure regulator is made up of conduit, valve and handle, and conduit passes two end faces of closure plate, on the conduit of valve installation outside closure plate, valve top mounting handle.
Use a method for above-mentioned prefabricated direct-buried thermal insulation pipe foaming plugging device, it adopts following steps:
A. get out prefabricated direct-buried thermal insulation pipe plugging device, closure plate is fixed on operation bench, brushing polyurethane release agent, then closure plate is pushed in the thermal insulation layer annular housing between working steel tube and outer pillar along the external diameter of the working steel tube of thermal insulation pipe;
B. regulate pressure regulator, make cavity internal pressure inside closure plate identical with external atmosphere pressure;
C. bore material hole in the neutral position of the outer pillar of thermal insulation pipe, the aperture of material hole is consistent with the external diameter of the rifle head of high pressure foaming machine;
D. in the thermal insulation layer annular housing between the outer pillar and working steel tube of thermal insulation pipe, inject polyurethane combined material by material hole to foam;
E. when polyurethane combined material foaming is to when just filling thermal insulation layer annular housing, closing pressure regulator, is prevented polyurethane from being overflowed by pressure regulator and " running material " phenomenon occurs;
F., after urethane cures unsticking, shift out plugging device by operation bench, and clear up in time, open pressure regulator, complete one step foaming.
The invention has the beneficial effects as follows:
Prefabricated direct-buried thermal insulation pipe foaming plugging device of the present invention can make the working steel tube of thermal insulation pipe and the outer pillar of PE carry out foaming operation under complete hermetic state in prefabricated direct-buried pipe foam process; The pressure regulator of use plugging device can adjust the pressure in thermal insulation layer annular housing at any time, polyurethane combined material is enable to fill whole cavity uniformly, ensure that the smooth outflow of polyurethane combined material, polyurethane is fully foamed in whole cavity, prevents the structural defect of polyurethane foam; After polyurethane fully foams in cavity, according to foaming situation at any time by regulating pressure regulator to reach the loss effect preventing polyurethane combined material, reduce the defective phenomenon of density of the polyurethane insulation coating that " running material " causes, reduction cost of production; The cone structure of closure plate is applicable to the thermal insulation pipe that outside Multiple Type, pillar requires and produces, and reduces the quantity of plugging device, avoids and often disassemble plugging device, improve manufacturing efficiency.
The advantage that prefabricated direct-buried thermal insulation pipe foaming plugging device of the present invention and using method have that structure is simple, easy to use, sealing effect is good, can regulate pressure at any time, not only can prevent polyurethane foam from occurring structural defect, also avoid and run material, reduce cost of production.The invention solves the medium-term and long-term open question of foam process in prefabricated direct-buried thermal insulation pipe production, ensure that the quality of prefabricated direct-buried thermal insulation pipe product, reduce cost of production that there is significant economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of prefabricated direct-buried thermal insulation pipe foaming plugging device of the present invention;
Fig. 2 is the side view of Fig. 1.
Number in the figure is as follows: closure plate 1, pressure regulator 2, inner ring flexible seal ring 3, outer shroud flexible seal ring 4, tapped blind hole 5, conduit 6, valve 7, handle 8.
Embodiment
Show in figure, prefabricated direct-buried thermal insulation pipe foaming plugging device of the present invention is made up of closure plate 1, pressure regulator 2, inner ring flexible seal ring 3, outer shroud flexible seal ring 4.
Show in figure, closure plate 1 is annular slab, and the outer circumference diameter of closure plate 1 and the internal diameter of outer pillar match, and the diameter of bore of closure plate 1 and the external diameter of working steel tube match, and closure plate 1 is arranged on the two ends of thermal insulation layer respectively, seals thermal insulation layer.
Show in figure, the outer peripheral surface of closure plate 1 and inner ring surface are respectively by inner ring flexible seal ring 3, outer shroud flexible seal ring 4 and the inwall of outer pillar and the outer wall compact siro spinning technology of working steel tube, for sealing closure plate 1 and the gap between working steel tube and outer sleeve, inner ring flexible seal ring 3, outer shroud flexible seal ring 4 ensure that the sealing of thermal insulation layer cavity, anti-leak-stopping material.Closure plate 1 both ends of the surface are stretched out at the two ends of inner ring flexible seal ring 3 and outer shroud flexible seal ring 4, are more convenient for installing.
Show in figure, pressure regulator 2 is arranged on closure plate 1, and the thermal insulation layer inner chamber body inside closure plate 1 is connected with ambient atmosphere by pressure regulator 2.Use pressure regulator 2 can adjust the pressure in thermal insulation layer annular housing at any time, polyurethane combined material is enable to fill whole cavity uniformly, ensure that the smooth outflow of polyurethane combined material, polyurethane is fully foamed in whole cavity, prevents the structural defect of polyurethane foam.
Pressure regulator 2 is made up of conduit 6, valve 7 and handle 8, and conduit 6 is through two end faces of closure plate 1, and valve 7 is arranged on the conduit 6 outside closure plate 1, valve 7 top mounting handle 8.The handle 8 that rotating valve 7 connects can regulate the Throughput of conduit 6, reaches the object of the pressure regulated in thermal insulation layer annular housing.The adjustment of valve 7 can manual tune, also can install automatic control tegulatingdevice.
Show in figure, the front portion of the excircle of closure plate 1 is taper, and tapered outer ends face is relative with thermal insulation layer.The thermal insulation pipe that cone structure is applicable to the outer pillar requirement of Multiple Type is produced, and reduces the quantity of plugging device, avoids and often disassemble plugging device, improve manufacturing efficiency.
Show in figure, the ear end face of closure plate 1 has 4-6 tapped blind hole 5, tapped blind hole 5 is uniformly distributed along closure plate 1 ear end face annular circumferential, and tapped blind hole 5 is for being fixed on operating table by screw rod by plugging device.The embodiment shown in figure adopts welded nut on closure plate 1 end face to serve as the method for tapped blind hole 5, more than mantle fiber saving of work and time of holing on closure plate 1.
The using method of prefabricated direct-buried thermal insulation pipe foaming plugging device of the present invention, it adopts following steps:
(1) get out prefabricated direct-buried thermal insulation pipe plugging device, closure plate 1 is fixed on operation bench, brushing polyurethane release agent, then closure plate 1 is pushed in the thermal insulation layer annular housing between working steel tube and outer pillar along the external diameter of the working steel tube of thermal insulation pipe;
(2) regulate pressure regulator 2, inside making closure plate 1, cavity internal pressure is identical with external atmosphere pressure;
(3) bore material hole in the neutral position of the outer pillar of thermal insulation pipe, the aperture of material hole is consistent with the external diameter of the rifle head of high pressure foaming machine;
(4) in the thermal insulation layer annular housing between the outer pillar and working steel tube of thermal insulation pipe, inject polyurethane combined material by material hole to foam;
(5) when polyurethane combined material foaming is to when just filling thermal insulation layer annular housing, closing pressure regulator 2, is prevented polyurethane from being overflowed by pressure regulator 2 and " running material " phenomenon occurs;
(6) after urethane cures unsticking, shift out plugging device by operation bench, and clear up in time, open pressure regulator 2, complete one step foaming.
Claims (4)
1. a prefabricated direct-buried thermal insulation pipe foaming plugging device, it is characterized in that: it is by closure plate (1), pressure regulator (2), inner ring flexible seal ring (3), outer shroud flexible seal ring (4) forms, closure plate (1) is annular slab, closure plate (1) is arranged on the two ends of thermal insulation layer respectively, the outer circumference diameter of closure plate (1) and the internal diameter of outer pillar match, the diameter of bore of closure plate (1) and the external diameter of working steel tube match, the outer peripheral surface of closure plate (1) and inner ring surface are respectively by inner ring flexible seal ring (3), outer shroud flexible seal ring (3) and the inwall of outer pillar and the outer wall compact siro spinning technology of working steel tube, pressure regulator (2) is arranged on closure plate (1), the thermal insulation layer inner chamber body of closure plate (1) inner side is connected with ambient atmosphere by pressure regulator (2).
2. prefabricated direct-buried thermal insulation pipe foaming plugging device according to claim 1, it is characterized in that: the front portion of the excircle of described closure plate (1) is taper, tapered outer ends face is relative with thermal insulation layer, the ear end face of closure plate (1) has 4-6 tapped blind hole (5), 4-6 tapped blind hole (5) is uniformly distributed along closure plate (1) ear end face annular circumferential.
3. prefabricated direct-buried thermal insulation pipe foaming plugging device according to claim 2, it is characterized in that: described pressure regulator (2) is made up of conduit (6), valve (7) and handle (8), conduit (6) is through two end faces of closure plate (1), valve (7) is arranged on the conduit (6) in closure plate (1) outside, valve (7) top mounting handle (8).
4. use a method for above-mentioned prefabricated direct-buried thermal insulation pipe foaming plugging device, it is characterized in that: it adopts following steps:
A. get out prefabricated direct-buried thermal insulation pipe plugging device, closure plate (1) is fixed on operation bench, brushing polyurethane release agent, then closure plate (1) is pushed in the thermal insulation layer annular housing between working steel tube and outer pillar along the external diameter of the working steel tube of thermal insulation pipe;
B. regulate pressure regulator (2), make closure plate (2) inner side cavity internal pressure identical with external atmosphere pressure;
C. bore material hole in the neutral position of the outer pillar of thermal insulation pipe, the aperture of material hole is consistent with the external diameter of the rifle head of high pressure foaming machine;
D. in the thermal insulation layer annular housing between the outer pillar and working steel tube of thermal insulation pipe, inject polyurethane combined material by material hole to foam;
E. when polyurethane combined material foaming is to when just filling thermal insulation layer annular housing, closing pressure regulator (2), prevents polyurethane from being overflowed by pressure regulator (2) and " running material " phenomenon occurs;
F. after urethane cures unsticking, shift out plugging device by operation bench, and clear up in time, open pressure regulator (2), complete one step foaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047227.6A CN104633376A (en) | 2015-01-30 | 2015-01-30 | Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047227.6A CN104633376A (en) | 2015-01-30 | 2015-01-30 | Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method |
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| CN104633376A true CN104633376A (en) | 2015-05-20 |
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| CN201510047227.6A Pending CN104633376A (en) | 2015-01-30 | 2015-01-30 | Prefabricated direct-buried thermal insulating pipe foaming plugging device and usage method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU178730U1 (en) * | 2017-02-10 | 2018-04-18 | Руслан Александрович Севрюков | Mechanical seal for the manufacture of thermally insulated pipes |
| CN108453990A (en) * | 2018-04-03 | 2018-08-28 | 天津职业技术师范大学 | Insulating tube foaming process middle port automatic-sealed and pressing device |
| CN108548041A (en) * | 2018-05-05 | 2018-09-18 | 芜湖君如保温材料有限公司 | It is a kind of to adjust controllable utilidor end-sealing device |
| CN110510253A (en) * | 2019-08-15 | 2019-11-29 | 江苏地龙管业有限公司 | The pipe cap of prefabricated steel bushing steel direct-buried steam insulation pipe |
| CN113827336A (en) * | 2021-10-26 | 2021-12-24 | 苏州海宇新辰医疗科技有限公司 | Freezing sacculus pipe |
| CN114953316A (en) * | 2022-05-17 | 2022-08-30 | 天津太合节能科技有限公司 | Heat-insulating pipe manufacturing method based on cyclopentane foaming process |
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| DE2364501A1 (en) * | 1973-12-24 | 1975-07-03 | Bayer Ag | INJECTION NOZZLE FOR FOAMING MACHINES |
| CN201844157U (en) * | 2010-11-10 | 2011-05-25 | 闫杰 | Hydraulic pipeline leaking stopping device |
| CN103062576A (en) * | 2011-10-24 | 2013-04-24 | 胜利油田胜利石油化工建设有限责任公司 | Foam insulated pipe plugging device and plugging method |
| CN203637080U (en) * | 2013-12-13 | 2014-06-11 | 哈尔滨朗格斯特节能科技有限公司 | High-density polyurethane foam reinforced mold for prefabricating directly-buried heat insulating tube |
| CN204062329U (en) * | 2014-09-09 | 2014-12-31 | 唐山丰南君业节能保温材料有限公司 | A kind of prefabricated direct-buried thermal insulation pipe foaming plugging device |
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2015
- 2015-01-30 CN CN201510047227.6A patent/CN104633376A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2364501A1 (en) * | 1973-12-24 | 1975-07-03 | Bayer Ag | INJECTION NOZZLE FOR FOAMING MACHINES |
| CN201844157U (en) * | 2010-11-10 | 2011-05-25 | 闫杰 | Hydraulic pipeline leaking stopping device |
| CN103062576A (en) * | 2011-10-24 | 2013-04-24 | 胜利油田胜利石油化工建设有限责任公司 | Foam insulated pipe plugging device and plugging method |
| CN203637080U (en) * | 2013-12-13 | 2014-06-11 | 哈尔滨朗格斯特节能科技有限公司 | High-density polyurethane foam reinforced mold for prefabricating directly-buried heat insulating tube |
| CN204062329U (en) * | 2014-09-09 | 2014-12-31 | 唐山丰南君业节能保温材料有限公司 | A kind of prefabricated direct-buried thermal insulation pipe foaming plugging device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU178730U1 (en) * | 2017-02-10 | 2018-04-18 | Руслан Александрович Севрюков | Mechanical seal for the manufacture of thermally insulated pipes |
| CN108453990A (en) * | 2018-04-03 | 2018-08-28 | 天津职业技术师范大学 | Insulating tube foaming process middle port automatic-sealed and pressing device |
| CN108548041A (en) * | 2018-05-05 | 2018-09-18 | 芜湖君如保温材料有限公司 | It is a kind of to adjust controllable utilidor end-sealing device |
| CN110510253A (en) * | 2019-08-15 | 2019-11-29 | 江苏地龙管业有限公司 | The pipe cap of prefabricated steel bushing steel direct-buried steam insulation pipe |
| CN113827336A (en) * | 2021-10-26 | 2021-12-24 | 苏州海宇新辰医疗科技有限公司 | Freezing sacculus pipe |
| CN113827336B (en) * | 2021-10-26 | 2023-09-01 | 苏州海宇新辰医疗科技有限公司 | Freezing sacculus pipe |
| CN114953316A (en) * | 2022-05-17 | 2022-08-30 | 天津太合节能科技有限公司 | Heat-insulating pipe manufacturing method based on cyclopentane foaming process |
| CN114953316B (en) * | 2022-05-17 | 2024-02-23 | 天津太合节能科技有限公司 | Heat preservation pipe manufacturing method based on cyclopentane foaming process |
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Application publication date: 20150520 |
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