CN212617072U

CN212617072U - Prefabricated direct-burried insulating tube with novel waterproof construction

Info

Publication number: CN212617072U
Application number: CN202021018438.XU
Authority: CN
Inventors: 郭玉坤; 颛孙伟勋; 张星
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-26
Anticipated expiration: 2030-06-05

Abstract

The utility model provides a prefabricated direct-burried insulating tube with novel waterproof construction, belongs to insulating tube waterproof equipment technical field for prevent that prefabricated direct-burried insulating tube of polyurethane foam is deposited, is transported, the heat preservation layer intake in the work progress. The technical scheme is as follows: and brushing or spraying a layer of surface treatment agent on two end faces of the heat-insulating layer of the polyurethane foam prefabricated direct-buried heat-insulating pipe, and then spraying or brushing an elastomer waterproof layer. The utility model discloses simple structure, water-proof effects are good, have solved the elastomer waterproof layer and have not done the bonding problem of corona treatment's nonpolar compound class outer jacket, have also solved the elastomer waterproof layer and have not done the bonding problem of corona treatment's nonpolar compound class working tube for working tube, heat preservation, outer jacket, surface treatment agent layer, elastomer waterproof layer form five integrative structures, have effectively prevented rainwater or groundwater from getting into the heat preservation, have guaranteed the heat preservation effect of insulating tube, have prolonged the life of insulating tube.

Description

Prefabricated direct-burried insulating tube with novel waterproof construction

Technical Field

The utility model relates to a be used for heat supply with prefabricated direct-burried insulating tube belongs to insulating tube waterproof equipment technical field.

Background

The prefabricated direct-buried heat-insulating pipe has the advantages of low construction cost, low heat loss, energy conservation, corrosion resistance, good insulativity, long service life, small occupied area and the like, and is widely applied to heat supply pipe networks. The structure of the high-density polyethylene outer protective layer hard polyurethane foam plastic prefabricated direct-buried heat-insulating pipe (short for: prefabricated direct-buried heat-insulating pipe) is as follows from inside to outside in sequence: a working steel pipe, hard polyurethane foam plastic and a high-density polyethylene outer protective layer. When the prefabricated direct-buried insulating pipe is stored or constructed, the prefabricated direct-buried insulating pipe is often wetted by rainwater or soaked by underground water, so that the insulating layer enters water, the insulating effect is reduced or the insulating effect is failed, and meanwhile, the moisture contained in the insulating layer causes the working steel pipe to be corroded, and the service life of the insulating pipe is seriously influenced.

Chinese patent number ZL 201520064975.0 discloses a prefabricated direct-burried insulating tube with waterproof construction, its scheme is: the annular waterproof blocking plate made of rigid materials is additionally arranged between the working steel pipe and the outer protective layer, and the waterproof blocking plate is tightly combined with the working pipe and the outer protective layer, so that water can be effectively prevented from entering the heat preservation layer. The invention needs to carry out waterproof and anticorrosion treatment on the waterproof closure plate, the outer circumferential surface of the waterproof closure plate is hermetically connected with the inner wall of the outer protective layer through waterproof filler and anticorrosion filler, and the inner hole surface of the waterproof closure plate is hermetically connected with the outer wall of the working steel pipe through the waterproof filler and the anticorrosion filler. Although the scheme can effectively prevent water from entering the heat-insulating layer, the production process is complex and the cost is high.

Although the problems are solved, the flexible waterproof structure is only suitable for the insulating pipe with the inner wall of the polyethylene outer protective layer subjected to corona treatment. Namely, the waterproof layer can only be tightly combined with the inner wall of the polyethylene outer protective pipe after corona treatment, the polyurethane heat-insulating layer and the working pipe (pipe fitting) to form a four-in-one structure. However, with the development of the production and construction technology of the direct-buried heat-insulating pipe, new requirements are put on the production of the heat-insulating pipe, for example, the implementation of GB/T34611-2017 "rigid polyurethane spray polyethylene winding prefabricated direct-buried heat-insulating pipe", the direct-buried heat-insulating pipe produced according to this standard cannot be corona-treated, and the polyethylene outer jacket is flush with the port of the polyurethane heat-insulating layer, under this condition, a flexible waterproof structure invented by zhangxing cannot satisfy the requirement that the waterproof layer, the polyethylene outer jacket, the heat-insulating layer, and the working pipe (pipe fitting) form a four-in-one type rigid waterproof structure. In addition, the popularization of the secondary heat supply network with the working pipe as a plastic pipe is realized by the Chinese town heat supply association in technical standards of town heat supply direct-buried heat preservation plastic pipelines, which are implemented 1 month and 1 day 2020, and the PE-RT working pipe and the flexible waterproof material proposed by Zhang Xing cannot generate strong bonding force, so that a waterproof layer, a polyethylene outer protection layer, a heat preservation layer and the working pipe (pipe fitting) cannot form a four-in-one tight waterproof structure. Along with the implementation of GB/T34611-2017 rigid polyurethane spray polyethylene winding prefabricated direct-buried heat insulation pipe, urban heating direct-buried heat insulation plastic pipeline technical standard and the continuous popularization of the production process, a waterproof structure suitable for the rigid polyurethane spray polyethylene winding prefabricated direct-buried heat insulation pipe needs to be developed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a prefabricated direct-burried insulating tube with novel waterproof construction is provided, the bonding problem of elastomer waterproof layer and the nonpolar compound class outer jacket of not doing corona treatment can be solved to this kind of waterproof construction, also can solve the bonding problem of elastomer waterproof layer and the nonpolar compound class work pipe of not doing corona treatment, make waterproof layer, outer jacket, heat preservation, the quadruple formula structure can be realized to the work pipe, and then prevent that the heat preservation from soaking and the heat preservation that causes is inefficacy, thereby prolong the life of insulating tube.

The technical scheme for solving the technical problems is as follows:

the prefabricated directly buried heat insulating pipe with new waterproof structure includes working pipe, heat insulating layer and outer protecting layer, the heat insulating layer is filled between the working pipe and the outer protecting layer, and the end surface of the outer protecting layer is flush with the end surface of the heat insulating layer.

Above-mentioned prefabricated direct-burried insulating tube with novel waterproof construction, there are a plurality of ring support frames in the insulating layer, and ring support frame's hole is connected with the working tube periphery, and ring support frame's outside is connected as an organic wholely with the insulating layer, and the outer jacket is helical bellows outer jacket or cylinder outside of tubes sheath, and the inner wall of outer jacket is connected with ring support frame's upper end.

The utility model has the advantages that:

the utility model flushes the end surface of the outer protective layer with the end surface of the heat preservation layer, increases the effective contact area of the outer protective layer and the heat preservation pipe during the heat preservation construction of the joint, and has better sealing effect; the surface treatment agent is sprayed on the end surface of the outer protective layer and the end surface of the heat insulation layer, and the elastomer waterproof layer is sprayed on the surface treatment agent, so that the bonding strength between the end surface and the elastomer waterproof layer is increased, the end surface is not easy to fall off, and the waterproof effect is better; when the requirement of the outer protective layer on the waterproof performance is not high, the elastomer waterproof layer is directly coated on the end face of the outer protective layer, the end face of the heat insulation layer and the end part of the steel pipe, and the elastomer waterproof layer can be guaranteed to play a waterproof role.

The utility model discloses simple structure, water-proof effects are good, have solved the elastomer waterproof layer and have not been the bonding problem of corona treatment's nonpolar compound class outer jacket, have also solved the elastomer waterproof layer and have not been corona treatment's nonpolar compound class working tube's bonding problem for waterproof layer, outer jacket, heat preservation, working tube can realize the quadbit integral type structure, and then can prevent that the heat preservation from soaking and the heat preservation that causes is inefficacy, thereby has prolonged the life of heat preservation pipe.

Drawings

Fig. 1 is a schematic structural view of the outer jacket of the spiral corrugated pipe according to the present invention;

fig. 2 is a schematic structural view of the outer sheath of the cylindrical pipe according to the present invention;

fig. 3 is a schematic structural view of another outer jacket of the present invention, which is a spiral corrugated pipe outer jacket;

fig. 4 is a schematic structural diagram of another outer sheath of the cylindrical pipe according to the present invention.

The figures are labeled as follows: the device comprises a working pipe 1, a heat insulation layer 2, an annular support frame 3, a spiral corrugated pipe outer protective layer 4, a cylindrical pipe outer protective layer 5, a surface treatment agent layer 6 and an elastomer waterproof layer 7.

Detailed Description

The figure shows, the utility model discloses a basic structure includes working pipe 1, heat preservation 2, outer jacket, and heat preservation 2 is filled between working pipe 1 and outer jacket, and the outer jacket terminal surface flushes with the heat preservation terminal surface.

The figure shows that there are a plurality of ring support frames 3 in heat preservation 2, and the hole of ring support frame 3 is connected with work pipe 1 periphery, and the outside of ring support frame 3 is connected as an organic whole with heat preservation 2, and the inner wall of outer jacket is connected with ring support frame 3's upper end.

Fig. 1 and 2 show, the utility model discloses an outer jacket is helical bellows outer jacket 4 or cylinder outside of tubes sheath 5 respectively, helical bellows

outer jacket

4 or 5 terminal surfaces of cylinder outside of tubes sheath respectively with heat preservation terminal surface spraying one deck surface treatment agent 6, 6 outer spraying one deck elastomer waterproof layers 7 of surface treatment agent, increased terminal surface and 7 adhesive strength of elastomer waterproof layer, be difficult for droing, water-proof effects is better. At the two ends of the heat preservation pipe, the elastomer waterproof layer 7 is tightly bonded with the outer wall of the working pipe 1, the end face of the heat preservation layer and the end face of the outer protection layer by utilizing the self bonding function, and the waterproof function is achieved.

The utility model discloses a working pipe 1 can be steel pipe, plastic tubing, nodular cast-iron pipe, cement pipe, and surface treatment agent 6 is located 2 both ends of heat preservation of insulating tube, closely combines with working pipe 1, outer jacket terminal surface, heat preservation terminal surface, and elastomer waterproof layer 7 covers surface treatment agent 6 entirely.

By adopting the structure, the problem of bonding between the elastomer waterproof layer 7 and the nonpolar compound outer protective layer which is not subjected to corona treatment is solved, and the problem of bonding between the elastomer waterproof layer 7 and the nonpolar compound working pipe 1 which is not subjected to corona treatment is also solved, so that the waterproof layer, the outer protective layer, the heat-insulating layer 2 and the working pipe 1 can realize a four-bit integrated structure, the heat-insulating layer 2 can be prevented from being soaked and the heat-insulating layer caused by water failure, and the service life of the heat-insulating pipe is prolonged.

Fig. 3 and 4 show that the two other structures of the present invention are that the outer protective layer is a spiral corrugated pipe outer protective layer 4 or a cylinder pipe outer protective layer 5, and the end surface of the spiral corrugated pipe outer protective layer 4 or the cylinder pipe outer protective layer 5 is directly coated with an elastomer waterproof layer 7.

The reason for adopting this kind of structure is that, to the insulating tube that the waterproof requirement is not high and does not require the insulating tube to be waterproof in the whole life cycle, surface treatment agent 6 can not be sprayed on outer jacket terminal surface and insulating layer terminal surface, directly at outer jacket terminal surface and insulating layer terminal surface spraying or brush coating a layer of elastomer waterproof layer 7, elastomer waterproof layer 7 forms a waterproof structure that bonding force is not strong with outer jacket terminal surface and working pipe 1, can also reach and prevent that the rainwater from drenching heat preservation 2.

The utility model discloses an embodiment as follows:

composition of surface treatment agent layer 6: ethyl alpha-cyanoacrylate;

composition of elastomer waterproof layer 7:

the summer formula comprises the following components: 107 silica gel (viscosity 10000), dibutyltin dilaurate, methyl tributyl ketoxime silane, flame retardant and pigment;

the winter formula comprises the following components: 107 silica gel (viscosity 3000), dibutyltin dilaurate, methyl tributyl ketoxime silane, flame retardant and pigment.

Claims

1. The utility model provides a prefabricated direct-burried insulating tube with novel waterproof construction, it includes working tube (1), heat preservation (2), outer jacket, and heat preservation (2) are filled between working tube (1) and outer jacket, and the outer jacket terminal surface flushes its characterized in that with the heat preservation terminal surface: the end surfaces of the outer protective layer and the heat insulation layer are sprayed with a layer of surface treatment agent (6), and the surface treatment agent (6) is sprayed with a layer of elastomer waterproof layer (7).

2. The prefabricated direct-burried insulating tube with novel waterproof construction of claim 1, characterized in that: there are a plurality of ring support frame (3) in heat preservation (2), and the hole of ring support frame (3) is connected with work pipe (1) periphery, and the outside and heat preservation (2) of ring support frame (3) are connected as an organic wholely, and the outer jacket is spiral corrugated pipe outer jacket (4) or cylinder outside of tubes sheath (5), and the inner wall of outer jacket is connected with the upper end of ring support frame (3).