Heat preservation type steel pipe

Abstract

The utility model relates to the technical field of steel pipes, and discloses a heat preservation type steel pipe which comprises a limiting outer pipe assembly, a sealing ring sleeve assembly is installed at one end of the limiting outer pipe assembly in a limiting mode, and a telescopic inner pipe assembly is installed in the limiting outer pipe assembly in a limiting mode. The telescopic inner pipe assembly is installed in the device, so that when the device is used, corresponding length adjustment work can be carried out through the arranged telescopic inner pipe assembly in different use scenes, and therefore it can be guaranteed that the device can carry out flexible and convenient adjustment work support.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipes, specifically to a heat-insulating steel pipe. Background Technology

[0002] Insulated steel pipes are steel pipes that, after undergoing insulation processing, ensure that the internal and surface temperatures of the working steel pipe meet or reach the required usage temperatures under different working environments and external media. They are widely used in liquid and gas transmission networks, as well as in chemical pipeline insulation projects, petroleum, chemical, district heating networks, central air conditioning ventilation ducts, municipal engineering, and other fields. Since the 1970s, foreign countries have generally attached great importance to the production and application of insulated steel pipes, striving to significantly reduce energy consumption, environmental pollution, and the greenhouse effect, and new insulation materials have continuously emerged. Previously, the development of insulated steel pipes in China was slow; before 1980, a few insulation plants could only produce a small amount of underground direct-buried insulated steel pipes. However, after more than 30 years of effort, especially the rapid development in the last 10 years, products have gone from non-existent to diverse, quality has gradually improved, and applications have become increasingly widespread. Currently, traditional pipeline insulation materials on the market mostly use glass wool, slag wool, or perlite. These materials have problems such as high water absorption, poor mechanical strength, unsatisfactory insulation effect, high labor intensity during construction, environmental pollution, impact on operator health, and low production efficiency. Furthermore, the large quantities required increase transportation burdens, leading to frequent and costly maintenance and short service life, far from meeting the demands of modern construction for insulated pipelines. Although in recent years, domestic and international research on composite insulated steel pipes has yielded some results, existing composite insulated steel pipes still suffer from complex processing techniques, high manufacturing costs, poor sealing effect, insufficient pressure resistance, and unsatisfactory insulation performance.

[0003] Application number CN202022165259.5 discloses a novel plastic-coated insulated steel pipe, comprising a working pipe body, a plastic coating layer, a pressure-resistant pipe body, and an outer pipe body. The working pipe body is disposed inside the pressure-resistant pipe body, and the outer pipe body is disposed outside the pressure-resistant pipe body. A high-temperature resistant insulation layer is provided between the working pipe body and the pressure-resistant pipe body, and a polyurethane insulation layer is provided between the pressure-resistant pipe body and the outer pipe body. The outer surface of the outer pipe body is coated with a high-temperature resistant anti-corrosion coating. Multiple annular mounting grooves are uniformly provided along the axial direction on the outer wall of the high-temperature resistant insulation layer. A number of pressure-resistant springs are uniformly connected along the axial direction on the inner surface of the pressure-resistant pipe body, and one end of each pressure-resistant spring is connected to a spherical mounting block that matches the mounting groove. This utility model provides a novel plastic-coated insulated steel pipe with the above-mentioned structure, which extends the service life and improves the compressive strength, corrosion resistance and heat insulation performance of the steel pipe; however, it has shortcomings. When the device is used, it is not yet able to adjust the length according to different usage scenarios, which limits the use of the device in different fields or to meet different needs. Utility Model Content

[0004] The purpose of this invention is to provide an insulated steel pipe that solves the problem that the device is not yet able to adjust its length for different usage scenarios, thus limiting its application in different fields or to meet different needs.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a heat-insulating steel pipe, including a limiting outer pipe assembly, a sealing ring assembly is installed at one end of the limiting outer pipe assembly, and a telescopic inner pipe assembly is installed inside the limiting outer pipe assembly.

[0007] The telescopic inner tube assembly includes an adjusting outer tube, with a spring strip fixedly installed around one end of the adjusting outer tube. Limiting side plates are fixedly installed on the outer walls of the ends of several spring strips, and limiting toothed racks are provided on the inner walls of the spring strips.

[0008] Furthermore, the limiting outer tube assembly includes an adjusting inner tube, and the limiting outer tube is fixedly installed on the outer wall of the adjusting inner tube.

[0009] Furthermore, the adjusting inner tube includes a tube body, and a plurality of support bars are fixedly installed around the end of the tube body, with limit teeth blocks fixedly installed on the outer wall of the ends of the plurality of support bars.

[0010] Furthermore, the limiting outer tube includes an outer tube sleeve, the outer wall of the end of the outer tube sleeve is provided with an assembly groove, and the outer tube sleeve is fixedly installed on the outer wall of the tube body. At the same time, a limiting ring is fixedly installed at the end of the outer tube sleeve, and an inclined movable space is formed between the outer tube sleeve and the tube body. A space is provided between the limiting ring and the tube body, and the assembly groove is set as an annular groove.

[0011] Furthermore, the sealing ring assembly includes a sealing ring, one end of which is limited and installed inside the assembly groove by a set installation limiting ring, and the other end of the sealing ring is fixedly installed with a sealing silicone edge.

[0012] Furthermore, the limiting side plate and the limiting ring mutually limit each other, and the limiting rack and the limiting tooth block mutually limit each other.

[0013] This utility model has the following beneficial effects:

[0014] (1) The present invention provides a heat-insulating steel pipe by installing a telescopic inner tube assembly inside the device, which allows for length adjustment in different usage scenarios when using the device, thus ensuring that the device can be flexibly adjusted.

[0015] (2) The present invention provides a heat-insulating steel pipe by installing a sealing ring assembly on the device, which can ensure that when the device is used for expansion and contraction adjustment, the sealing ring assembly can prevent leakage and other problems when the steel pipe is used for flow guidance.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a heat-insulating steel pipe according to the present invention;

[0019] Figure 2 This is a schematic diagram of the disassembled structure of a thermal insulation steel pipe according to the present invention;

[0020] Figure 3 This is a cross-sectional view of a heat-insulating steel pipe according to the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of a thermal insulation steel pipe telescopic inner tube assembly according to this utility model;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] In the diagram: 1. Limiting outer tube assembly; 2. Sealing ring assembly; 3. Telescopic inner tube assembly; 101. Adjusting inner tube; 102. Limiting outer tube; 201. Sealing ring; 202. Installation limiting ring; 203. Sealing silicone edge; 301. Adjusting outer tube; 302. Spring strip; 303. Limiting side plate; 304. Limiting rack; 1011. Tube body; 1012. Support bar; 1013. Limiting tooth block; 1021. Assembly groove; 1022. Outer tube sleeve; 1023. Limiting ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 As shown, this utility model is a heat-insulating steel pipe, including a limiting outer pipe assembly 1, a sealing ring assembly 2 is installed at one end of the limiting outer pipe assembly 1, and a telescopic inner pipe assembly 3 is installed inside the limiting outer pipe assembly 1.

[0026] The telescopic inner tube assembly 3 includes an adjusting outer tube 301. One end of the adjusting outer tube 301 is fixedly equipped with a spring strip 302. Limiting side plates 303 are fixedly installed on the outer wall of the ends of several spring strips 302, and a limiting toothed rack 304 is provided on the inner wall of the spring strip 302.

[0027] By installing a telescopic inner tube assembly 3 inside the device, the length of the device can be adjusted according to different usage scenarios, thus ensuring that the device can be flexibly adjusted.

[0028] The limiting outer tube assembly 1 includes an adjusting inner tube 101, and a limiting outer tube 102 is fixedly installed on the outer wall of the adjusting inner tube 101.

[0029] The adjusting inner tube 101 includes a tube body 1011. Several support bars 1012 are fixedly installed around the end of the tube body 1011. Limiting tooth blocks 1013 are fixedly installed on the outer wall of the end of the several support bars 1012. The limiting tooth bars 304 and the limiting tooth blocks 1013 mesh with each other to limit the movement, so that the telescopic inner tube assembly 3 can maintain a stable position during the telescopic process and will not rotate or deviate at will.

[0030] The limiting outer tube 102 includes an outer tube sleeve 1022. An assembly groove 1021 is provided on the outer wall of the end of the outer tube sleeve 1022. The outer tube sleeve 1022 is fixedly installed on the outer wall of the tube body 1011. At the same time, a limiting ring 1023 is fixedly installed at the end of the outer tube sleeve 1022. An inclined movable space is formed between the outer tube sleeve 1022 and the tube body 1011. A space is provided between the limiting ring 1023 and the tube body 1011. The assembly groove 1021 is set as an annular groove.

[0031] The sealing ring assembly 2 includes a sealing ring 201. One end of the sealing ring 201 is limited and installed inside the assembly groove 1021 by a set installation limiting ring 202, and the other end of the sealing ring 201 is fixedly installed with a sealing silicone edge 203. The sealing silicone edge 203 of the sealing ring assembly 2 fits tightly against the pipe connection to prevent media leakage and ensure the sealing and safety of the pipeline transportation.

[0032] The limiting side plate 303 and the limiting ring 1023 limit each other, and the limiting rack 304 and the limiting tooth block 1013 limit each other. The spring strip 302, the limiting side plate 303 and the limiting rack 304 at one end of the adjusting outer tube 301 in the telescopic inner tube assembly 3 cooperate with the support 1012, the limiting tooth block 1013 and the limiting ring 1023 of the adjusting inner tube 101 in the limiting outer tube assembly 1 to realize the telescopic inner tube assembly 3 in the limiting outer tube assembly 1 for telescopic extension and limiting fixation.

[0033] This insulated steel pipe operates through the coordinated cooperation of the limiting outer pipe assembly 1, the sealing ring assembly 2, and the telescopic inner pipe assembly 3. Its core principle lies in utilizing the special structural design of each component to ensure the sealing of the pipe connection while achieving adjustable pipe length to adapt to different usage scenarios and working conditions. The limiting structure between components ensures the stability of the pipe during expansion and contraction. The elastic strip 302, limiting side plate 303, and limiting rack 304 at one end of the adjusting outer pipe 301 in the telescopic inner pipe assembly 3 cooperate with the support strip 1012 and limiting tooth block 1013 of the adjusting inner pipe 101 in the limiting outer pipe assembly 1, as well as the limiting ring 1023 of the limiting outer pipe 102, to achieve the expansion, contraction, and limiting fixation of the telescopic inner pipe assembly 3 within the limiting outer pipe assembly 1. The sealing ring assembly 2 ensures the sealing of the pipe connection, preventing media leakage. In the working process, the limiting outer pipe assembly 1, the sealing ring assembly 2, and the telescopic inner pipe assembly 3 are prepared first. In the limiting outer tube assembly 1, the adjusting inner tube 101 consists of a tube body 1011, a support bar 1012, and a limiting tooth block 1013; the limiting outer tube 102 includes an outer tube sleeve 1022, an assembly groove 1021, and a limiting ring 1023; the sealing ring assembly 2 consists of a sealing ring 201, an installation limiting ring 202, and a sealing silicone edge 203; the telescopic inner tube assembly 3 includes an adjusting outer tube 301, a spring bar 302, a limiting side plate 303, and a limiting toothed bar 304, which will seal the outer tube. The installation limiting ring 202 at one end of the sealing ring 201 of the sealing ring assembly 2 is installed into the assembly groove 1021 of the limiting outer tube 102 in the limiting outer tube assembly 1, thus connecting the sealing ring assembly 2 and the limiting outer tube assembly 1. At this time, the sealing silicone edge 203 faces outward for subsequent sealing work. Then, the adjusting outer tube 301 of the telescopic inner tube assembly 3 is inserted into the adjusting inner tube 101 of the limiting outer tube assembly 1, so that the elastic bar 302 enters the adjusting inner tube 101. As it is inserted, the elastic bar 302 is compressed and deformed. When the limiting side plate 303 reaches the position of the limiting ring 1023, the elastic bar 302 recovers part of its deformation, and the limiting side plate 303 and the limiting ring 1023 mutually limit each other, preventing the telescopic inner tube assembly 3 from coming out of the limiting outer tube assembly 1. Meanwhile, the limiting rack 304 and the limiting block 1013 mesh with each other to limit the position, ensuring that the telescopic inner tube assembly 3 maintains a stable position during telescopic movement and does not rotate or deviate arbitrarily. When the length of the insulated steel pipe needs to be adjusted, external force is applied to the telescopic inner tube assembly 3. Due to the mutual limiting effect of the limiting rack 304 and the limiting block 1013, the telescopic inner tube assembly 3 can only move along the axial direction of the adjusting inner tube 101. During the movement, the elastic strip 302 undergoes elastic deformation, providing a certain amount of buffering and restoring force to ensure the smoothness and stability of the telescopic process. When the steel pipe is transporting the medium, the sealing silicone edge 203 of the sealing ring assembly 2 tightly fits the pipe connection to prevent medium leakage and ensure the sealing and safety of the pipeline transportation.Meanwhile, the structure formed between the limiting outer tube assembly 1 and the telescopic inner tube assembly 3 provides insulation to a certain extent, reducing heat or cold loss and meeting the usage requirements of insulated steel pipes. During maintenance or disassembly, the pipeline is first emptied to ensure no media residue remains. Then, appropriate external force is applied to overcome the elasticity of the spring clip 302 and the resistance of each limiting structure, pulling the telescopic inner tube assembly 3 out of the limiting outer tube assembly 1. Next, the sealing ring assembly 2 is removed from the assembly slot 1021 of the limiting outer tube 102. Each component is inspected, cleaned, and maintained; damaged parts are replaced if necessary. After completion, the assembly is reassembled according to the installation procedure.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A type of insulated steel pipe, comprising a limiting outer pipe assembly (1), characterized in that: One end of the limiting outer tube assembly (1) is fitted with a sealing ring assembly (2), and the inside of the limiting outer tube assembly (1) is fitted with a telescopic inner tube assembly (3). The telescopic inner tube assembly (3) includes an adjusting outer tube (301), one end of which is fixedly equipped with a spring strip (302), and the outer wall of the ends of several spring strips (302) is fixedly equipped with a limiting side plate (303), and the inner wall of the spring strip (302) is provided with a limiting toothed rack (304).

2. The insulated steel pipe according to claim 1, characterized in that: The limiting outer tube assembly (1) includes an adjusting inner tube (101), and a limiting outer tube (102) is fixedly installed on the outer wall of the adjusting inner tube (101).

3. The insulated steel pipe according to claim 2, characterized in that: The regulating inner tube (101) includes a tube body (1011), and a plurality of support bars (1012) are fixedly installed around the end of the tube body (1011). Limiting tooth blocks (1013) are fixedly installed on the outer wall of the end of the plurality of support bars (1012).

4. The insulated steel pipe according to claim 2, characterized in that: The limiting outer tube (102) includes an outer tube sleeve (1022). An assembly groove (1021) is provided on the outer wall of the end of the outer tube sleeve (1022). The outer tube sleeve (1022) is fixedly installed on the outer wall of the tube body (1011). At the same time, a limiting ring (1023) is fixedly installed at the end of the outer tube sleeve (1022). An inclined movable space is formed between the outer tube sleeve (1022) and the tube body (1011). A space is provided between the limiting ring (1023) and the tube body (1011). The assembly groove (1021) is set as an annular groove.

5. The insulated steel pipe according to claim 1, characterized in that: The sealing ring assembly (2) includes a sealing ring (201). One end of the sealing ring (201) is limited and installed inside the assembly groove (1021) by a set installation limiting ring (202), and the other end of the sealing ring (201) is fixedly installed with a sealing silicone edge (203).

6. The insulated steel pipe according to claim 1, characterized in that: The limiting side plate (303) and the limiting ring (1023) limit each other, and the limiting rack (304) and the limiting tooth block (1013) limit each other.

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