Prefabricated thermal insulation pipeline compensation structure

Abstract

The utility model relates to the technical field of heat preservation pipeline compensation, in particular to a prefabricated heat preservation pipeline compensation structure, and aims to solve the problem of breakage of a heat preservation layer and an outer protection pipe caused by thermal expansion and cold contraction and the problem of leakage inspection caused by breakage of the heat preservation layer and the outer protection pipe. The structure comprises a main steel pipe connected with the movable end of the compensator, flange plates arranged at the two ends of the main steel pipe, and a heat preservation layer and a PE outer protection pipe wrapped outside the main steel pipe. Particularly, a prefabricated heat preservation layer is arranged between the left outer protection end pipe and the right outer protection end pipe, a PE flexible corrugated pipe is installed on the outer side of the prefabricated heat preservation layer to absorb thermal dynamic deformation, and safe operation of the pipeline is guaranteed. In addition, an inspection observation pipe with a one-way valve is arranged, so that the leakage condition of the compensator is conveniently monitored, and external liquid is prevented from invading. By means of factory prefabrication and on-site rapid assembly, the construction efficiency and the system reliability are improved. According to the utility model, the later maintenance process is simplified, the service life is prolonged, the heat energy loss is reduced, and the economical efficiency and the safety of the whole heat supply system are improved.

Description

Technical Field

[0001] This utility model relates to the field of thermal insulation pipeline compensation technology, specifically to a prefabricated thermal insulation pipeline compensation structure. Background Technology

[0002] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] The existing sleeve compensator insulation method is to install it in the well chamber and insulate it on site. Because the pipeline will expand and contract with the temperature during hot operation, and the insulation layer moves with the steel pipe, if there is no compensation device for the insulation layer, the insulation layer and the outer PE pipe will break, resulting in the loss of insulation and protection effects.

[0004] Currently, existing prefabricated direct-buried corrugated compensators do not solve the problems of prefabricated insulation and how to check whether the sleeve compensator has leaked the conveying medium. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a prefabricated insulated pipe compensation structure that is easy to produce and install and includes an inspection device, aiming to improve production and installation efficiency and facilitate the inspection of whether the sleeve compensator is leaking.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A prefabricated insulated pipeline compensation structure includes a compensator main steel pipe connected to the movable end of a right compensator, a flange connected to the movable end of a left compensator at the end of the compensator main steel pipe, an insulation layer on the outer side of the compensator main steel pipe and the flange, and an outer protective PE pipe on the insulation layer.

[0008] The outer protective PE pipe includes a prefabricated left outer protective end pipe and a right outer protective end pipe, which are respectively fitted and installed on the movable end of the left compensator and the movable end of the right compensator.

[0009] A prefabricated insulation layer is provided between the left outer end tube and the right outer end tube. A PE flexible corrugated pipe is provided on the outside of the prefabricated insulation layer. Support rings are provided at both ends of the PE flexible corrugated pipe. The connecting ends of the left outer end tube and the right outer end tube are respectively connected to the corresponding support rings and the two ends of the PE flexible corrugated pipe through threaded fasteners. A compensating corrugated sleeve is provided on the outside of the PE flexible corrugated pipe and installed on the support ring.

[0010] An inspection and observation tube with its lower end extending into the pre-insulated layer is installed on the side of the left or right outer protective tube, and the inspection and observation tube is equipped with a one-way valve.

[0011] Preferably, the two ends of the PE flexible corrugated pipe are fitted inside the left outer protective end pipe and the right outer protective end pipe.

[0012] Preferably, the two ends of the prefabricated insulation layer are respectively fitted into the left outer protective tube and the right outer protective tube.

[0013] Preferably, the outer side of the support ring has multiple countersunk holes for mating with threaded fasteners.

[0014] Preferably, the lower end of the inspection tube is provided with a threaded section, and the threaded section is provided with a nut and a sealing gasket.

[0015] Preferably, the outer end of the inspection and observation tube is a bent tube with the opening facing downwards.

[0016] This utility model includes, but is not limited to, the following beneficial effects:

[0017] This invention adds a soft corrugated device to the PE outer protective pipe of the insulation layer to absorb and resolve the movement of the pipeline due to thermal expansion and contraction, which can effectively ensure the safe operation of the pipeline.

[0018] Meanwhile, considering the tendency of sleeve compensators to leak, inspection and observation pipes were added to the insulation layer and the outer PE pipe to check for leaks at any time.

[0019] This utility model can be laid by direct burial, reducing the construction of manholes in the pipeline, reducing project costs, and lowering construction costs; it completely avoids cracking of the insulation layer and PE pipe, extends the service life of the pipeline, and reduces heat loss during pipeline operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the modular disassembly structure of this utility model.

[0022] The reference numerals used in the attached figures are as follows:

[0023] 1. Right compensator movable end; 2. Compensator main steel pipe; 3. Right outer protective end pipe; 4. Left outer protective end pipe; 5. Pre-insulated layer; 6. Support ring; 7. PE flexible corrugated pipe; 8. Compensating corrugated sleeve; 9. Inspection and observation pipe; 10. One-way valve; 11. Nut; 12. Sealing gasket. Detailed Implementation

[0024] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figures 1 to 2 A prefabricated insulated pipe compensation structure is presented, which aims to solve the problem of insulation layer and outer protective pipe breakage caused by thermal expansion and contraction and the resulting leakage inspection problem. It includes a compensator main body steel pipe 2 connected to the right compensator movable end 1, the end of the compensator main body steel pipe 2 is provided with a flange connected to the left compensator movable end, the outer surface of the compensator main body steel pipe 2 and the flange is provided with an insulation layer, and an outer protective PE pipe is provided on the insulation layer.

[0026] The outer protective PE pipe includes a prefabricated left outer protective end pipe 4 and a right outer protective end pipe 3, which are respectively installed on the movable end of the left compensator and the movable end of the right compensator 1.

[0027] A prefabricated insulation layer 5 is provided between the left outer end tube 4 and the right outer end tube 3. A PE flexible corrugated pipe 7 is provided on the outside of the prefabricated insulation layer 5. Support rings 6 are provided at both ends of the PE flexible corrugated pipe 7. The connecting ends of the left outer end tube 4 and the right outer end tube 3 are respectively connected to the corresponding support rings 6 and the two ends of the PE flexible corrugated pipe 7 through threaded fasteners. A compensating corrugated sleeve 8 is provided on the outside of the PE flexible corrugated pipe 7 and installed on the support rings 6. Multiple countersunk holes are opened on the outer side of the support rings 6 to cooperate with the threaded fasteners. The two ends of the PE flexible corrugated pipe 7 and the prefabricated insulation layer 5 are fitted inside the left outer end tube 4 and the right outer end tube 3. In specific implementation, according to the structural characteristics of the sleeve compensator, each insulation component can be prefabricated in the factory and then installed on site. In this way, the later maintenance process is simplified, the service life is extended, heat loss is reduced, and the economy and safety of the overall heating system are improved.

[0028] An inspection and observation tube 9, with its lower end extending into the pre-insulation layer 5, is installed on the side of the left outer protective tube 4 or the right outer protective tube 3. The lower end of the inspection and observation tube 9 is provided with a threaded section, which is equipped with a nut 11 and a sealing gasket 12. The outer end of the inspection and observation tube 9 is a bent tube with its opening facing downwards. A one-way valve 10 is installed on the inspection and observation tube 9.

[0029] During normal operation of direct-buried prefabricated insulated pipelines for heating, the steel pipes expand and contract with the rising temperature of the heating medium. Since the insulation layer and steel pipe form an integrated structure, the thermal deformation of the steel pipe causes the insulation layer to expand as well. This thermal deformation is an instantaneous expansion of the pipe. The expansion of the steel pipe is absorbed by the steel compensator, but the PE outer protective pipe of the insulation layer lacks the capacity to absorb this expansion, potentially leading to breakage of both the PE outer protective pipe and the insulation layer. This poses a safety hazard to the heating pipeline, and if it encounters groundwater, it will suffer corrosion, shortening the pipeline's lifespan. It also results in heat loss of the heating medium, increasing heating costs. Therefore, installing a flexible corrugated pipe on the PE outer protective pipe of the insulation layer to absorb and manage the movement caused by thermal expansion and contraction effectively ensures the safe operation of the pipeline.

[0030] The inspection and observation device is used to check for leaks in steel compensators. It can be made of steel pipe or PE pipe. A valve should be installed on the outlet pipe to prevent external water or other liquids from entering the compensator's insulation layer and corroding the steel compensator. During inspection, open the valve; if a large amount of hot gas or other media comes out, it indicates a leak in the steel compensator, requiring repair.

[0031] To facilitate future maintenance and effective inspection for leak detection, soft insulation material has been installed within a certain range at the moving end of the compensator. This allows for the discharge of hot gas or liquid media and facilitates cleaning and replacement for future leak repairs. It also facilitates the maintenance and refilling of sealing packings on the steel compensator.

[0032] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0033] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this utility model, are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prefabricated insulated pipeline compensation structure, comprising a compensator main steel pipe connected to the movable end of a right compensator, wherein a flange connected to the movable end of a left compensator is provided at the end of the compensator main steel pipe, and an insulation layer is provided on the outer side of the compensator main steel pipe and the flange, wherein an outer protective PE pipe is provided on the insulation layer; Its features are: The outer protective PE pipe includes a prefabricated left outer protective end pipe and a right outer protective end pipe, which are respectively fitted and installed on the movable end of the left compensator and the movable end of the right compensator. A prefabricated insulation layer is provided between the left outer end tube and the right outer end tube. A PE flexible corrugated pipe is provided on the outside of the prefabricated insulation layer. Support rings are provided at both ends of the PE flexible corrugated pipe. The connecting ends of the left outer end tube and the right outer end tube are respectively connected to the corresponding support rings and the two ends of the PE flexible corrugated pipe through threaded fasteners. A compensating corrugated sleeve is provided on the outside of the PE flexible corrugated pipe and installed on the support ring. An inspection and observation tube with its lower end extending into the pre-insulated layer is installed on the side of the left or right outer protective tube, and the inspection and observation tube is equipped with a one-way valve.

2. The prefabricated insulated pipe compensation structure as described in claim 1, characterized in that: The two ends of the PE flexible corrugated pipe are fitted inside the left outer protective end pipe and the right outer protective end pipe.

3. The prefabricated insulated pipe compensation structure as described in claim 1, characterized in that: The two ends of the prefabricated insulation layer are respectively fitted into the left outer protective tube and the right outer protective tube.

4. The prefabricated insulated pipe compensation structure as described in claim 1, characterized in that: The outer side of the support ring has multiple countersunk holes for mating with threaded fasteners.

5. The prefabricated insulated pipe compensation structure as described in claim 1, characterized in that: The lower end of the inspection tube is provided with a threaded section, and the threaded section is provided with a nut and a sealing gasket.

6. The prefabricated insulated pipe compensation structure as described in any one of claims 1 to 5, characterized in that: The outer end of the inspection and observation tube is configured as a bent tube with the opening facing downwards.

Images