Pipeline heat treatment device

Abstract

The utility model relates to the technical field of pipeline systems, in particular to a pipeline heat treatment device which comprises a cylindrical heater, the heater comprises two detachable semicircular cylinders which are symmetrically arranged, and heating wires are arranged on the semicircular cylinders; the heater is a straight cylinder or a bent cylinder which is the same as the heated pipeline section in shape, and the length of the heater is slightly larger than that of the heated pipeline section; sealing plates are arranged at the two ends of the semicircular cylinder, and semicircular through holes allowing pipelines to pass through are formed in the sealing plates; when the pipeline heat treatment device heats the pipeline, heating is more uniform, and the heating effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline systems, in particular to a pipeline heat treatment device. Background Art

[0002] There are many piping systems in chemical plants, and in order to improve installation efficiency, reduce installation costs, reduce welds, and include some practical difficulties in the installation process, there are many cases where pipes are bent. According to GB 50235-2010 Industrial Metal Pipe Engineering Construction Specifications, metal pipes should be heat treated in accordance with relevant regulations after hot or cold bending. For pipes with smaller volume or fewer bends, a heating furnace can be used for overall heat treatment. For pipes with larger volume or more bends and pipes that have been installed, they cannot be placed in a heating furnace for heat treatment.

[0003] The patent with application number 201611114823.2 discloses a large-scale bent pipe heat treatment device for power stations, including a cylindrical split heater, with insulation cotton of a certain height at both ends facing the inner hole direction, the two semi-circular rings can be opened, and loading and unloading are convenient, and the insulation cotton at both ends is in soft contact with the outer wall of the bent pipe to form a greenhouse, which can protect the bent pipe from being lost when heated; when heating, the push rod transmission mechanism pushes the bent pipe forward into the heater for heating; its disadvantages are: 1. The heater cannot completely wrap the part to be heated, and adopts a segmented heating method, resulting in uneven heating of each section and poor heating effect; 2. The pipeline is pushed in the heater, and there must be a certain gap between the heater and the pipeline, and the gap affects the sealing of the heater, resulting in heat loss and affecting the heating effect. Utility Model Content

[0004] The main purpose of the utility model is to provide a pipeline heat treatment device to solve the problem of poor heating effect of the pipeline heater in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a pipeline heat treatment device, including a cylindrical heater, the heater includes two detachable and symmetrically arranged semi-cylinders, and heating wires are provided on the semi-cylinders; the heater is a straight cylinder or a curved cylinder with the same shape as the heated pipeline section, and the length of the heater is slightly larger than the length of the heated pipeline section; sealing plates are provided at both ends of the semi-cylinders, and semi-circular through holes for the pipeline to pass through are provided on the sealing plates.

[0006] Furthermore, a fire-resistant sealing pad is provided on the edge of the semicircular through hole for sealing.

[0007] Furthermore, claw nails for supporting the pipeline are provided inside the semi-cylinder, and thermal insulation cotton is provided on the inner wall of the semi-cylinder; the provision of the claw nails facilitates a stable connection between the heater and the pipeline.

[0008] Furthermore, the semi-cylinder is connected to a protective gas inlet pipe; by providing the protective gas inlet pipe, protective gas can be introduced into the heater to prevent oxidation of the pipe during the heating process.

[0009] Furthermore, a detachable stainless steel tie for tightening the semi-cylinder is provided on the outer side of the heater.

[0010] The beneficial effects of the utility model are:

[0011] 1. The heater can completely wrap the heated part, so that the heating is more uniform and the heating effect is better;

[0012] 2. The heater and the pipeline are relatively still, and by setting a refractory sealing pad, the heater and the pipeline fit tightly, thereby achieving better sealing and better heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] Figure 1 It is a structural schematic diagram of an embodiment of a pipeline heat treatment device;

[0015] Figure 2 It is a cross-sectional schematic diagram of the refractory sealing gasket in the embodiment of the pipeline heat treatment device;

[0016] In the figure: 1. semi-cylinder; 2. claw nails; 3. sealing plate; 4. fire-resistant sealing pad; 5. protective gas inlet pipe; 6. heat-keeping cotton; 7. heating wire. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] Pipeline heat treatment device embodiment

[0019] like Figure 1 As shown, a pipeline heat treatment device includes a cylindrical heater, the heater includes two detachable and symmetrically arranged semi-cylinders 1, and the semi-cylinders 1 are provided with heating wires 7; the heater is a straight cylinder or a curved cylinder with the same shape as the heated pipeline section, and the length of the heater is slightly larger than the length of the heated pipeline section; sealing plates 3 are provided at both ends of the semi-cylinder 1, and the sealing plates 3 are provided with semicircular through holes for the pipeline to pass through.

[0020] The interior of the semi-cylinder 1 is provided with claw nails 2 for supporting the pipeline, and the inner wall of the semi-cylinder 1 is provided with thermal insulation cotton 6; the provision of the claw nails is conducive to a stable connection between the heater and the pipeline.

[0021] The semi-cylinder 1 is connected with a protective gas inlet pipe 5; by providing the protective gas inlet pipe, protective gas can be introduced into the heater to prevent oxidation of the pipe during the heating process.

[0022] The outer side of the heater is provided with a detachable stainless steel tie for tightening the semi-cylinder 1 .

[0023] like Figure 2 As shown, in one specific embodiment, a fire-resistant sealing pad 4 for sealing is provided at the edge of the semicircular through hole, and the material of the fire-resistant sealing pad 4 is asbestos fiber.

[0024] Pipeline processing and connection method embodiment

[0025] A pipeline processing and connection method comprises the following steps:

[0026] S1. Processing a plurality of straight pipes of required length, wherein the straight pipes are made of nickel-based alloy;

[0027] S2. Bend the straight pipe according to the needs;

[0028] S3, processing a plurality of pipeline heat treatment devices, the shape of the pipeline heat treatment devices being the same as the shape of the pipeline section to be heat treated;

[0029] S4, using a pipeline heat treatment device to perform a solution treatment on the bend in step S2. During the solution treatment, the heater is filled with protective gas. The solution treatment process is: raising the temperature of the pipeline to 1110°C-1130°C within 5 minutes, keeping the temperature constant for 15-20 minutes, removing the pipeline heat treatment device, and using a large amount of normal temperature water to cool the pipeline to below 100°C within 2 minutes;

[0030] S5. Transport the solution treated pipeline to the site for installation and welding;

[0031] S6. Use a pipeline heat treatment device to perform solid solution treatment on the weld in step S5. During the solid solution treatment, the heater is filled with protective gas. The solid solution treatment process is: raise the temperature of the pipeline to 1110°C-1130°C within 5 minutes, keep the temperature constant for 15-20 minutes, remove the pipeline heat treatment device, and use a large amount of normal temperature water to cool the pipeline to below 100°C within 2 minutes.

[0032] In one specific embodiment, the solution treatment process is: raising the temperature of the pipeline to 1110°C within 5 minutes, keeping the temperature constant for 20 minutes, removing the pipeline heat treatment device, and using a large amount of normal temperature water to cool the pipeline to below 100°C within 2 minutes.

[0033] In another specific embodiment, the solution treatment process is as follows: the temperature of the pipeline is raised to 1120°C within 5 minutes, the pipeline heat treatment device is removed after the constant temperature is maintained for 18 minutes, and the pipeline is cooled to below 100°C within 2 minutes using a large amount of normal temperature water.

[0034] In another specific embodiment, the solution treatment process is: raising the temperature of the pipeline to 1130°C within 5 minutes, removing the pipeline heat treatment device after maintaining the temperature for 15 minutes, and using a large amount of normal temperature water to cool the pipeline to below 100°C within 2 minutes.

[0035] By performing heat treatment and solid solution treatment on the pipeline, the toughness and corrosion resistance of the pipeline bends and welds are improved, solving the problem of easy leakage of the pipeline.

[0036] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pipeline heat treatment device, comprising a cylindrical heater, the heater comprising two detachable and symmetrically arranged semi-cylinders (1), the semi-cylinders (1) being provided with heating wires (7); characterized in that: The heater is a straight cylinder or a curved cylinder having the same shape as the pipe section to be heated, and the length of the heater is slightly greater than the length of the pipe section to be heated; sealing plates (3) are provided at both ends of the semi-cylinder (1), and the sealing plates (3) are provided with semi-circular through holes for the pipe to pass through.

2. The pipeline heat treatment device according to claim 1, characterized in that: A fire-resistant sealing pad (4) for sealing is provided at the edge of the semicircular through hole.

3. The pipeline heat treatment device according to claim 1, characterized in that: The interior of the semi-cylinder (1) is provided with claw nails (2) for supporting the pipeline, and the inner wall of the semi-cylinder (1) is provided with thermal insulation cotton (6).

4. The pipeline heat treatment device according to claim 1, characterized in that: The semi-cylinder (1) is connected to a protective gas inlet pipe (5).

5. The pipeline heat treatment device according to claim 1, characterized in that: The outer side of the heater is provided with a detachable stainless steel tie for tightening the semi-cylinder (1).

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