A kind of anti-corrosion and heat-insulating steel pipe

Abstract

The utility model relates to the field of thermal insulation pipes, in particular to an anti-corrosion thermal insulation steel pipe. Due to the fact that the glue injection point is fixed and the foaming agent solidifies quickly, a technical problem of uneven foaming density near the injection point and the edge of the thermal insulation pipe is caused. A hole is opened on the flange between the outer pipe and the inner pipe, and glue injection pipes are respectively passed through the holes of the flanges at both ends. The sealing ends of the two glue injection pipes are connected to a supporting disc, and the outer ends of the glue injection pipes can be connected to a glue injection mechanism. When connected, the glue injection pipes are located at the upper part of the thermal insulation pipe. When the glue injection pipes are located at the upper part, the glue outlets on the pipe wall face downward, and a plurality of glue outlets are evenly distributed on the glue injection pipes. The foaming agent is guided by the glue injection pipes to be sprayed from the evenly distributed glue outlets at the same time, so that the gap between the inner and outer pipes is injected with glue synchronously by the plurality of glue outlets, the foaming density in the gap is uniform, and the foaming agent is filled in the connecting hole of the supporting disc, thereby enhancing the thermal insulation effect at the supporting disc.

Description

Technical Field

[0001] The utility model relates to the field of thermal insulation pipes, in particular to an anti-corrosion thermal insulation steel pipe. Background Art

[0002] Anti-corrosion and thermal insulation steel pipe is a pipeline product with dual protection functions. It combines the characteristics of anti-corrosion layer and thermal insulation layer. It is widely used in thermal insulation and antifreeze projects of pipelines in petroleum, chemical industry, central heating, central air conditioning, municipal administration, etc. The design concept of this steel pipe is to increase the service life of the pipeline, reduce energy loss, and reduce maintenance costs;

[0003] When injecting foaming agent into the insulation pipe of the prior art, the foaming agent is filled from the middle injection port to the space between the inner and outer pipes. Since the injection point is fixed and the foaming agent solidifies quickly, the foaming density near the injection point and the edge of the insulation pipe is uneven. The utility model solves the above problem. Utility Model Content

[0004] The utility model aims to solve the technical problem that when the foaming agent is injected into the thermal insulation pipe in the prior art, the foaming density is uneven near the injection point and the edge of the thermal insulation pipe due to the fixed injection point and the fast curing speed of the foaming agent, thereby providing an anti-corrosion thermal insulation steel pipe.

[0005] An anti-corrosion heat-insulating steel pipe, comprising: an outer pipe, an inner pipe is concentrically arranged inside the outer pipe, flange fixing rings are connected at both ends of the outer pipe, the flange is connected to the flange fixing ring by bolts, a hole is opened on the flange between the outer pipe and the inner pipe, and injection pipes are respectively passed through the holes of the flanges at both ends, the sealing ends of the two injection pipes are connected to the supporting disc, the outer ends of the injection pipes can be connected to the injection mechanism, the injection pipes are located at the upper part of the heat-insulating pipe when connected, the glue outlet on the pipe wall faces downward when the injection pipe is located at the upper part, and a plurality of the glue outlets are evenly distributed on the injection pipes;

[0006] Furthermore, a communication hole is provided on the supporting disc.

[0007] Beneficial effects of the utility model:

[0008] 1. The foaming agent is guided to be sprayed out from the evenly distributed glue outlets through the glue injection pipe, so that the gap between the inner and outer tubes is injected with glue synchronously by multiple glue outlets, and the foaming density in the gap is uniform;

[0009] 2. The foaming agent is filled in the connecting holes of the supporting disc, thereby enhancing the heat preservation effect at the supporting disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2It is a schematic diagram of the structural section of the utility model.

[0012] In the figure: outer tube 1; inner tube 2; flange fixing ring 3; flange plate 4; bolt 5; glue injection tube 6; supporting disc 7; glue outlet 8; connecting hole 9. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] The rotational connection described in this device refers to the process of baking the bearing on the shaft, providing a spring retaining ring groove on the shaft or the shaft hole, and clamping the elastic retaining ring in the retaining ring groove to achieve axial fixation of the bearing and realize rotation; the articulation refers to a connection method that is active on connecting parts such as hinges, pins and short shafts.

[0015] The present invention will be described in detail below with reference to the accompanying drawings.

[0016] Embodiment 1:

[0017] The following is combined with Figure 1-2 The present embodiment describes an anti-corrosion heat-insulating steel pipe, comprising: an outer pipe 1, an inner pipe 2 is concentrically arranged inside the outer pipe 1, flange fixing rings 3 are connected at both ends of the outer pipe 1, flange plates 4 are connected to the flange fixing rings 3 by bolts 5, holes are opened on the flange plates 4 between the outer pipe 1 and the inner pipe 2, and injection pipes 6 are respectively passed through the holes of the flange plates 4 at both ends, the sealing ends of the two injection pipes 6 are connected to the supporting disc 7, and the outer ends of the injection pipes 6 can be connected to the injection mechanism, and when connected, the injection pipes 6 are located at the upper part of the heat-insulating pipe, and when the injection pipes 6 are located at the upper part, the glue outlet 8 on the pipe wall faces downward, and a plurality of the glue outlets 8 are provided and evenly distributed on the injection pipes 6;

[0018] During installation, the support disc 7 is sleeved on the inner tube 2, and the outer tube 1 is sleeved on the support disc 7, so that the outer tube 1 and the inner tube 2 are coaxially centered, the flange plate 4 is fixed to the flange fixing ring 3 by bolts 5, the glue injection tube 6 is turned to the upper part, the glue injection mechanism is connected with the glue injection tubes 6 at both ends, a hole is opened in the upper part of the outer tube 1 to leave an exhaust channel, and the foaming agent is injected into the glue injection tube 6. The foaming agent flows in the glue injection tube 6 and is evenly sprayed into the gap between the outer tube 1 and the inner tube 2 through the evenly distributed glue outlets 8, so that the foaming density in the gap is consistent, and the air is discharged from the upper part of the outer tube 1. Two independent glue injection tubes 6 are set, and the pressure in the tube will not be low due to the excessive length of the glue injection tube 6, which will then cause uneven glue discharge from the glue outlet 8. The internal pressure of the two independent glue injection tubes 6 is consistent, and the foaming density is more uniform.

[0019] A connecting hole 9 is provided on the supporting disc 7;

[0020] The foaming agent is filled in the communicating holes 9 , thereby enhancing the heat preservation effect at the supporting disk 7 .

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-corrosion and heat-insulating steel pipe, comprising: An outer tube (1) is provided with an inner tube (2) concentrically disposed inside the outer tube (1), flange fixing rings (3) are connected to both ends of the outer tube (1), and a flange plate (4) is connected to the flange fixing ring (3) by bolts (5). The invention is characterized in that: a hole is provided on the flange (4) between the outer tube (1) and the inner tube (2), and a glue injection tube (6) is respectively passed through the holes of the flanges (4) at both ends, and the sealed ends of the two glue injection tubes (6) are connected to the supporting disc (7), and the outer ends of the glue injection tubes (6) can be connected to the glue injection mechanism. When connected, the glue injection tubes (6) are located on the upper part of the insulation tube, and when the glue injection tubes (6) are located on the upper part, the glue outlet (8) on the tube wall faces downward, and a plurality of glue outlets (8) are provided and evenly distributed on the glue injection tubes (6).

2. The anti-corrosion and heat-insulating steel pipe according to claim 1, characterized in that: The supporting disc (7) is provided with a communicating hole (9).

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