Device for testing reheat cracks of welded steel

Abstract

The utility model discloses a device for testing reheat cracks of steel after welding, and relates to the technical field of steel performance testing. The heating furnace comprises a heating furnace body, a furnace cover is hinged to the front side of the heating furnace body, a containing plate is arranged at the bottom in a containing cavity of the heating furnace body, a fixing assembly is arranged on the containing plate, an electric push rod is installed on the top of the heating furnace body, and the lower portion of the electric push rod and a telescopic shaft penetrate into the containing cavity of the heating furnace body. And a pressing head is mounted on the lower side of a telescopic shaft of the electric push rod. The device can adapt to samples with different sizes and shapes through the design of the fixing assembly, fine adjustment of clamping force is achieved through the spring and the friction block, it is ensured that the samples are stable and reliable in the testing process, the device integrates heating, cooling and pressure exerting for physical testing analysis, operation is easy and convenient, meanwhile, by accurately controlling all parameters, the testing efficiency is improved, and the testing efficiency is improved. The repeatability and the consistency of test results can be guaranteed, and comparative analysis on the thermal crack performance of different steel products is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel performance test technical field, specifically, relate to a kind of steel reheating crack testing device after welding. BACKGROUND

[0002] In the industry such as thermal power generation, such as 12Cr1MoV steel and so on is used in power station boiler superheater, reheater and steam pipeline and so on steel, after welding, especially after thick-walled pipe fitting welding, reheating crack problem is prominent.The existing test method has deficiency in simulating the real situation of welding heat-affected zone and accurately testing reheating crack.

[0003] In the current steel reheating crack testing process after welding, the existing device faces significant operation bottleneck in the fixing and clamping link for special-shaped steel, since the shape, size and structure of special-shaped steel are different, the existing fixing means is often difficult to effectively adapt, which not only makes test operation complex and time-consuming, but also easily leads to loosening, displacement and other phenomena of steel in the testing process, thereby affecting the accuracy of test results.

[0004] Therefore we make improvement, and propose a kind of steel reheating crack testing device after welding. UTILITY MODEL CONTENT

[0005] The utility model aims at: since the shape, size and structure of special-shaped steel are different, the existing fixing means is often difficult to effectively adapt, and it is also easy to lead to loosening, displacement and other phenomena of steel in the testing process, thereby affecting the accuracy of test results.

[0006] In order to realize the above-mentioned utility model purpose, the utility model provides the following technical scheme:

[0007] A kind of steel reheating crack testing device after welding to improve the above-mentioned problems.

[0008] The application is as follows:

[0009] It includes heating furnace body, the front side of the heating furnace body is hinged with furnace cover, the bottom of the heating furnace body placing cavity is provided with placing plate, the placing plate is provided with fixed component, the top of the heating furnace body is installed with electric push rod, the lower part of the electric push rod and telescopic shaft are penetrated into the placing cavity of heating furnace body, the lower side of the electric push rod telescopic shaft is installed with pressure head, pressure sensor is installed between the end of the electric push rod telescopic shaft and pressure head, the inner wall of the heating furnace body placing cavity is installed with heating piece and cooling pipeline, fixed component includes fixed frame installed on the upper side of placing plate, the inner wall of both sides of the fixed frame is installed with multiple groups of fixed cylinders, the inner wall of multiple groups of fixed cylinders is slidably connected with moving rod, the end of the moving rod is installed with contact block, spring is installed between the bottom of the moving rod and the inner wall bottom of fixed cylinder.

[0010] By the design of the fixing assembly, different sizes and shapes of samples can be adapted, and the clamping force is fine-tuned through the spring and the friction block, so that the sample is stable and reliable during the test, the device integrates heating, cooling, pressing and detection, is easy to operate, and is high in test efficiency.

[0011] As a preferred embodiment of the steel reheated crack testing device provided by the utility model, the heating furnace body placing cavity inner bottom both sides are equipped with fixing rods, the placing plate upper side both sides are equipped with through holes matched with the fixing rods, the fixing rod circumferential side is equipped with a plurality of positioning holes, and the placing plate outer side is slidably matched with two positioning pins matched with the two side positioning holes.

[0012] As a preferred embodiment of the steel reheated crack testing device provided by the utility model, the heating piece and the cooling pipeline are both around the sample, and the water inlet and the water outlet of the cooling pipeline are located at the back of the heating furnace body.

[0013] As a preferred embodiment of the steel reheated crack testing device provided by the utility model, the opposite sides of the two fixing plates are both equipped with limiting grooves, the side edge of the moving block is equipped with a limiting block slidably matched in the limiting groove, and the lower side of the moving block is equipped with a plurality of friction blocks abutting against a plurality of moving rods.

[0014] As a preferred embodiment of the steel reheated crack testing device provided by the utility model, the side edges of the two moving blocks are both rotationally matched with second threaded rods, and the side edge of the fixed frame is equipped with a second threaded groove threadedly matched with the second threaded rod.

[0015] Compared with the prior art, the utility model has the beneficial effects that: by the design of the fixing assembly, different sizes and shapes of samples can be adapted, and the clamping force is fine-tuned through the spring and the friction block, so that the sample is stable and reliable during the test, the device integrates heating, cooling, pressing and detection, is easy to operate, and is high in test efficiency. Meanwhile, through accurate control of various parameters, the repeatability and consistency of test results can be ensured, and different steel hot crack performance can be compared and analyzed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure schematic diagram of the steel reheated crack testing device provided by the utility model is shown in the figure.

[0017] Figure 2 The side cross-sectional structure schematic diagram of the heating furnace body provided by the utility model is shown in the figure.

[0018] Figure 3 The structure schematic diagram of the parts above the placing plate is provided for the application;

[0019] Figure 4 The structure schematic diagram of the fixed assembly is provided for the application;

[0020] Figure 5 The structure schematic diagram of the fixed assembly is provided for the application.

[0021] The figure indicates:

[0022] 1, heating furnace body; 2, furnace cover; 3, placing plate; 4, fixed assembly; 401, fixed frame; 402, fixed cylinder; 403, moving rod; 404, contact block; 405, spring; 406, fixed plate; 407, moving block; 408, limiting groove; 409, limiting block; 410, friction block; 411, second threaded rod; 412, second threaded groove; 5, electric push rod; 6, pressure head; 7, pressure sensor; 8, heating piece; 9, cooling pipeline; 10, fixed rod; 11, positioning hole; 12, through hole; 13, positioning pin. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0024] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0026] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0027] In the description of the utility model, it is necessary to explain that the position or position relation indicated by the terms "upper", "lower" and the like is based on the position or position relation shown in the drawing, or is the position or position relation that the utility model product is usually placed in use, or is the position or position relation that the person skilled in the art usually understands, these terms are only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as the limitation of the utility model.In addition, the terms "first", "second" and the like are only used for distinguishing description, and can not be understood as indicating or implying relative importance.

[0028] In order to enable the person skilled in the art to better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings.

[0029] It should be noted that the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0030] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0031] Embodiment 1

[0032] Please refer to Figures 1-5 A steel material welding reheating crack testing device, comprising: a heating furnace body 1, the front side of the heating furnace body 1 is hinged with a furnace cover 2, the bottom of the placing cavity of the heating furnace body 1 is provided with a placing plate 3, the placing plate 3 is provided with a fixing assembly 4, the top of the heating furnace body 1 is installed with an electric push rod 5, the lower part of the electric push rod 5 and the telescopic shaft are penetrated into the placing cavity of the heating furnace body 1, the lower side of the telescopic shaft of the electric push rod 5 is installed with a pressure head 6, a pressure sensor 7 is installed between the end of the telescopic shaft of the electric push rod 5 and the pressure head 6, the inner wall of the placing cavity of the heating furnace body 1 is installed with a heating piece 8 and a cooling pipeline 9, the heating piece 8 and the cooling pipeline 9 are all around the sample, the water inlet and the water outlet of the cooling pipeline 9 are located at the back of the heating furnace body 1, the both sides of the bottom of the placing cavity of the heating furnace body 1 are provided with fixing rods 10, the both sides above the placing plate 3 are provided with through holes 12 that are slidably matched with the fixing rods 10, a plurality of positioning holes 11 are formed in the circumferential side of the fixing rod 10, and the outer side of the placing plate 3 is slidably matched with two positioning pins 13 that are matched with the two positioning holes 11.

[0033] The implementation process: first open the hinge in the front side of the heating furnace body 1 furnace cover 2, to be tested steel sample placed on the placement plate 3, pull out the positioning pin 13 from the positioning hole 11 to remove the positioning, lifting the placement plate 3, placement plate 3 through the hole 12 on the fixed rod 10 sliding, placement plate 3 can be moved up and down in the placement cavity of the heating furnace body 1, positioning pin 13 can be temporarily sliding inside the placement plate 3, can't slide out of the inside of the placement plate 3, adjust to the appropriate test position, close the furnace cover 2, start heating furnace body 1 placement cavity wall heating element 8, wherein the heating element 8 can be specifically for the annular copper material, by controlling the current to heating element 8, make the sample around the local high temperature, simulate the heat affected zone temperature distribution and organization gradient change after welding of steel, according to the test requirements, into the cooling pipeline 9 cooling medium, realize the rapid cooling of the local area of the sample, simulate the complex thermal cycle process of the welding heat affected zone, heating element 8 and cooling pipeline 9 around the sample, can accurately simulate the heating and cooling process after welding, make the test result more close to the actual working condition, improve the accuracy and reliability of the test; start the electric push rod 5 installed in the top of the heating furnace body 1, the telescopic shaft of the electric push rod 5 downward, drive the pressure head 6 to the fixed sample to apply pressure. Pressure sensor 7 real-time monitoring of the pressure applied on the sample, can real-time detection and control the pressure applied on the sample, ensure the stability and repeatability of the test process, avoid the test result deviation caused by excessive or too small pressure, and the data feedback. Under the combined action of heating, cooling and loading pressure, observe whether the reheating crack appears in the sample and the development of the crack.

[0034] The implementation benefits: heating element 8 and cooling pipeline 9 around the sample, can accurately simulate the heating and cooling process after welding, pressure sensor 7 and electric push rod 5 cooperation, can real-time detection and control the pressure applied on the sample.

[0035] Example 2

[0036] The fixing assembly 4 comprises a fixing frame 401 arranged on the upper side of the placing plate 3, a plurality of fixing cylinders 402 are arranged on the inner walls of the two sides of the fixing frame 401, the inner walls of the plurality of fixing cylinders 402 are slidably connected with a plurality of moving rods 403, the end portions of the moving rods 403 are provided with contact blocks 404, and the bottoms of the moving rods 403 and the bottoms of the inner walls of the fixing cylinders 402 are provided with springs 405. The opposite sides of the plurality of fixing cylinders 402 are provided with fixing plates 406, the plurality of moving rods 403 penetrate through the fixing plates 406, and the opposite sides of the two fixing plates 406 are slidably connected with moving blocks 407. The opposite sides of the two fixing plates 406 are provided with limiting grooves 408, the side edges of the moving blocks 407 are provided with limiting blocks 409 which are slidably connected in the limiting grooves 408, and the lower sides of the moving blocks 407 are provided with a plurality of friction blocks 410 which abut against the plurality of moving rods 403. The side edges of the two moving blocks 407 are rotatably connected with second threaded rods 411, and the side edges of the fixing frame 401 are provided with second threaded grooves 412 which are threadedly connected with the second threaded rods 411.

[0037] Implementation process: the fixing frame 401 in the fixing assembly 4 is used for fixing a sample. The moving rods 403 in the fixing cylinders 402 on the two sides of the sample slide in the interior under the action of the springs 405, the fixing frame 401 is welded with the placing plate 3, and the sample is clamped through the contact blocks 404. By rotating the second threaded rods 411, the moving blocks 407 slide in the limiting grooves 408, and then the abutting degree of the friction blocks 410 and the moving rods 403 is adjusted, so that the clamping force of the sample is finely adjusted. The design of the fixing assembly 4 can adapt to samples of different sizes and shapes, and the clamping force is finely adjusted through the springs 405 and the friction blocks 410, so that the sample is stable and reliable during the test process.

[0038] Implementation benefits: the design of the fixing assembly 4 can adapt to samples of different sizes and shapes.

[0039] The above embodiments are only used to illustrate the technical solutions described in the utility model and not to limit the technical solutions described in the utility model. Although the utility model has been described in detail with reference to the above-mentioned embodiments, the utility model is not limited to the above-mentioned specific implementation methods, so any modification or equivalent replacement of the utility model; all technical solutions and improvements which do not deviate from the spirit and scope of the utility model are covered in the scope of the claims of the utility model.

Claims

1. A steel material reheat crack testing device after welding, characterized in that: include: A heating furnace body (1), wherein a furnace cover (2) is hingedly connected to the front side of the heating furnace body (1), a placement plate (3) is provided at the bottom of a placement cavity of the heating furnace body (1), a fixing assembly (4) is provided on the placement plate (3), an electric push rod (5) is installed on the top of the heating furnace body (1), a lower portion of the electric push rod (5) and a telescopic shaft extend through the placement cavity of the heating furnace body (1), a pressure head (6) is installed on the lower side of the telescopic shaft of the electric push rod (5), and a pressure sensor (7) is installed between the end of the telescopic shaft of the electric push rod (5) and the pressure head (6), The inner wall of the placement cavity of the heating furnace body (1) is installed with a heating element (8) and a cooling pipe (9), and the fixing assembly (4) includes a fixing frame (401) installed on the upper side of the placement plate (3), and the inner walls on both sides of the fixing frame (401) are installed with multiple groups of fixing cylinders (402), and the inner walls of the multiple groups of the fixing cylinders (402) are slidably matched with moving rods (403), and the ends of the moving rods (403) are installed with contact blocks (404), and a spring (405) is installed between the bottom of the moving rod (403) and the bottom of the inner wall of the fixing cylinder (402).

2. A steel material post-weld reheat crack testing device according to claim 1, characterized in that: The bottom of the heating furnace body (1) is provided with fixing rods (10) on both sides of the placement cavity, and through holes (12) are provided on both sides of the upper portion of the placement plate (3) for slidingly engaging with the fixing rods (10). A plurality of positioning holes (11) are provided on the peripheral side of the fixing rod (10), and the outer side of the placement plate (3) is provided with two positioning pins (13) for slidingly engaging with the positioning holes (11) on both sides.

3. The steel material post-weld reheat crack testing device according to claim 1, characterized in that: The heating element (8) and the cooling pipe (9) are both surrounded by the sample, and the water inlet and the water outlet of the cooling pipe (9) are located behind the heating furnace body (1).

4. The device for testing steel material reheat cracks after welding according to claim 1, characterized in that: The opposite sides of the multiple groups of fixed cylinders (402) on both sides are equipped with fixed plates (406), the multiple moving rods (403) all pass through the fixed plates (406), and the opposite sides of the two fixed plates (406) are slidably matched with moving blocks (407).

5. The device for testing steel material reheat cracks after welding according to claim 4, characterized in that: Limiting grooves (408) are provided on opposite sides of the two fixed plates (406), and limiting blocks (409) are installed on the sides of the moving block (407) so as to slide in the limiting grooves (408). The lower side of the moving block (407) is provided with multiple groups of friction blocks (410) that abut against the multiple moving rods (403).

6. The steel material post-weld reheat crack testing device according to claim 5, characterized in that: The sides of the two moving blocks (407) are both rotatably engaged with a second threaded rod (411), and the side of the fixed frame (401) is provided with a second threaded groove (412) threadably engaged with the second threaded rod (411).

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