Special auxiliary tool for heat treatment of large-thickness test plate

Abstract

The utility model relates to a special auxiliary tool for heat treatment of a large-thickness test plate, and belongs to the technical field of heat treatment tools. The special assistive device comprises a supporting transverse plate, a fixing plate and a middle plate. The supporting transverse plate is a cuboid; the number of the fixing plates is two, the fixing plates are located at the two ends of the supporting transverse plate respectively, the fixing plates are cuboids, and the length of the fixing plates is equal to or smaller than the width of the supporting transverse plate. The number of the middle plates is multiple, the middle plates are located between the fixing plates, the middle plates are cuboids, and the length of the middle plates is equal to or smaller than the width of the supporting transverse plates; a test plate is positioned between the fixed plate and the middle plate, and the distance between the fixed plate and the middle plate is slightly greater than the thickness of the test plate. According to the utility model, a plurality of test plates can be hoisted at one time, and the test plates are separated by the middle plates and do not influence one another.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat treatment frock technical field especially relates to a special auxiliary for big thickness test board heat treatment. BACKGROUND

[0002] The reactor pressure vessel and evaporator main body in nuclear power unit are mainly composed of a head and various cylinder parts, and the cylinder and the head and the cylinder and the cylinder need to be connected by welding during assembly. In order to ensure the quality, the performance of the base material, the weld and the heat affected zone after welding needs to be evaluated, and this kind of evaluation is not suitable for destroying the product. At this time, it is necessary to use the welding witness to approximate the product material to evaluate the welding performance. The welding witness (hereinafter referred to as test plate) is a slab-like forging with similar chemical composition, forging ratio and heat treatment state as the main forging. The test plate needs to undergo the same performance heat treatment process as the main forging.

[0003] At present, for the test plate with small heat treatment thickness (less than 100mm), the performance heat treatment is carried out in the form of stacking and hoisting. Several test plates are stacked and heated in the heat treatment furnace, and after meeting the process requirements, the whole is hoisted and quenched. This method has high efficiency, and multiple test plates are quenched at the same time. However, during the quenching process, the main circulation direction of the cooling water is vertical (parallel to the thickness direction of the test plate), and the flowability of the cooling water between the parallel stacked test plates is poor, which reduces the cooling effect of the water. Therefore, with the increase of the number of stacked test plates, the mechanical properties of the test plates will be difficult to guarantee, and this quenching method is only suitable for test plates with small heat treatment thickness.

[0004] For test plates with large thickness, in order to ensure the mechanical properties, only the vertical furnace and single hoisting and single quenching method can be used for heat treatment. Due to the limitations of operation space, discharge time and other factors, each crane can only lift one test plate for quenching, and the heat treatment efficiency is low. If two or more large-thickness test plates are simultaneously loaded into the furnace for heat treatment, one test plate is quenched after being discharged, in order to ensure the performance, the other test plate still needs to be heated and kept for a period of time, and then quenched after being discharged, which increases the energy consumption.

[0005] Therefore, a special lifting appliance or auxiliary tool is needed to increase the heat treatment efficiency of large-thickness test plates and reduce energy consumption under the premise of ensuring product quality. UTILITY MODEL CONTENTS

[0006] In view of the above analysis, the utility model aims to provide a special auxiliary for large-thickness test plate heat treatment, which increases the heat treatment efficiency of large-thickness test plates and reduces energy consumption under the premise of ensuring product quality.

[0007] The utility model provides a special auxiliary tool for big thickness test board heat treatment, the special auxiliary tool includes support horizontal board, fixed plate and intermediate plate,

[0008] The support horizontal board is cuboid,

[0009] The number of fixed plate is two, the fixed plate is located at the both ends of support horizontal board respectively, the fixed plate is cuboid, and the length of fixed plate is equal or less than the width of support horizontal board,

[0010] The number of intermediate plate is multiple, the intermediate plate is located between fixed plate, the intermediate plate is cuboid, and the length of intermediate plate is equal or less than the width of support horizontal board,

[0011] Test board is located between fixed plate and intermediate plate, and the distance between fixed plate and intermediate plate is slightly greater than the thickness of test board.

[0012] Further, the support horizontal board, the fixed plate and the intermediate plate are integrally formed.

[0013] Further, the fixed plate and the intermediate plate or the intermediate plate and the intermediate plate form a convex shape space.

[0014] Further, the support horizontal board, the fixed plate and the intermediate plate are integrally formed.

[0015] Further, the fixed plate and the intermediate plate are the same shape, and the fixed plate and the intermediate plate are slidingly fitted with the support horizontal plate.

[0016] Further, sliding grooves are formed on the support horizontal plate along the length direction thereof, and sliding blocks are fixed below the fixed plate and the intermediate plate.

[0017] Further, through holes are formed at both ends of the fixed plate and the intermediate plate, and recesses corresponding to the through holes are formed on the support horizontal plate, and a fixing rod is inserted into the through holes and the recesses to fix the fixed plate and the intermediate plate on the support horizontal plate.

[0018] Further, the total number of the fixed plate and the intermediate plate is at least two.

[0019] Further, a plurality of overflow grooves are formed on the upper surface of the support horizontal plate, and the overflow grooves are located between the fixed plate and the intermediate plate or between the intermediate plates, and are located below the test plate.

[0020] Further, lifting lugs are provided on the support horizontal plate or the fixed plate for lifting.

[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0022] 1. The special auxiliary tool provided by this utility model includes a supporting horizontal plate, a fixed plate, and an intermediate plate, with the fixed plate and intermediate plate located on the supporting horizontal plate. The test plate is placed between the fixed plate and the intermediate plate, or between the intermediate plates. This utility model can increase or decrease the number of intermediate plates according to the number of test plates and work efficiency, allowing multiple test plates to be hoisted at one time. The test plates are separated by the intermediate plates, preventing them from affecting each other. While ensuring product quality, it increases the heat treatment efficiency of thick test plates and reduces energy consumption.

[0023] 2. The special auxiliary tool provided by this utility model can be integrally molded or combined. When it is combined, it is more flexible and has stronger applicability. It can adjust the number of test plates and the number of fixed plates and intermediate plates. After use, it can also be disassembled for easy storage.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 A schematic diagram of an integrated special-purpose assistive device;

[0027] Figure 2 A schematic diagram illustrating the use of an integrated, specialized assistive device;

[0028] Figure 3 This is a schematic diagram of the structure of a special auxiliary tool for assembly molding;

[0029] Figure 4 Left side view of the assembly-type special auxiliary tool;

[0030] Figure label:

[0031] 1. Support plate; 11. Overflow groove; 2. Fixing plate; 21. Sliding block; 22. Sliding groove; 3. Intermediate plate; 4. Test plate; 5. Lifting lug; 6. Through hole. Detailed Implementation

[0032] The preferred embodiments of the utility model are described in detail below with reference to the drawings, wherein the drawings form part of the utility model and are used together with the embodiments of the utility model to explain the principles of the utility model, and are not used to limit the scope of the utility model.

[0033] In order to ensure quality, the performance of the base material, weld, and heat affected zone after welding needs to be evaluated, and such evaluation is not suitable for being carried out in a way of damaging products. At this time, it is necessary to use a welding witness to approximate represent the product material to evaluate the welding performance. The welding witness (hereinafter referred to as a test plate) is a slab-like forging with similar chemical composition, forging ratio, and heat treatment state as the main forging. The test plate needs to undergo the same performance heat treatment process as the main forging.

[0034] The test plate with a thickness of 100 mm or less is heated in a heat treatment furnace, and after meeting the process requirements, the whole is lifted and quenched. This kind of way has high efficiency, and multiple test plates are quenched at the same time. However, in the quenching process, the main circulation direction of the cooling water is the vertical direction (parallel to the thickness direction of the test plate), and the flowability of the cooling water between the parallel stacked test plates is poor, which leads to the weakening of the cooling effect of the water.

[0035] For the test plate with a large thickness, the thickness is more than 100 mm, in order to ensure the mechanical properties, only the vertical furnace, single lifting and single piece quenching method can be used for heat treatment. Due to the limitation of operation space, discharge time and other aspects, each crane can only lift one test plate for quenching, and the heat treatment efficiency is low. If two or more large-thickness test plates are simultaneously loaded into the furnace for heat treatment, after one is quenched, in order to ensure the performance, the other one still needs to be heated and kept for a period of time, and then quenched, which increases the energy consumption.

[0036] Therefore, the utility model provides a special auxiliary tool for heat treatment of large-thickness test plate 4, including support horizontal plate 1, fixed plate 2 and intermediate plate 3;

[0037] The support horizontal plate 1 is a cuboid;

[0038] The number of fixed plate 2 is two, and the fixed plate 2 is located at both ends of the support horizontal plate 1 respectively, the fixed plate 2 is a cuboid, and the length of the fixed plate 2 is equal to or less than the width of the support horizontal plate 1;

[0039] The number of intermediate plate 3 is multiple, and the intermediate plate 3 is located between the fixed plate 2, the intermediate plate 3 is a cuboid, and the length of the intermediate plate 3 is equal to or less than the width of the support horizontal plate 1;

[0040] The test plate 4 is located between the fixed plate 2 and the intermediate plate 3, and the distance between the fixed plate 2 and the intermediate plate 3 is slightly greater than the thickness of the test plate 4.

[0041] Compared with the prior art, the special auxiliary provided by the utility model includes support horizontal plate 1, fixed plate 2 and intermediate plate 3, and the fixed plate 2 and the intermediate plate 3 are located on the support horizontal plate 1, and the test plate 4 is arranged between the fixed plate 2 and the intermediate plate 3 or between the intermediate plate 3 and the intermediate plate 3. The utility model can increase or reduce the number of intermediate plates 3 according to the number and working efficiency of test plates 4, a plurality of test plates 4 can be hoisted at one time, and the test plates 4 are separated by the intermediate plates 3 and do not affect each other. Under the premise of ensuring product quality, the heat treatment efficiency of the large-thickness test plate 4 is increased, and energy consumption is reduced.

[0042] In the use process, because the length of the test plate 4 is long, two special auxiliaries are used in combination, the two ends of the test plate 4 are arranged in the special auxiliaries respectively, and the special auxiliaries are hoisted by a crane or a travelling crane, so that the heating and water quenching of the test plate 4 are realized.

[0043] Specifically, the support horizontal plate 1, the fixed plate 2 and the intermediate plate 3 are integrally formed.

[0044] It should be noted that when the special auxiliary is integrally formed, the overall strength is high, and a plurality of test plates 4 can be carried.

[0045] Specifically, the fixed plate 2 and the intermediate plate 3 or the intermediate plate 3 and the intermediate plate 3 form a convex letter-shaped space.

[0046] Specifically, the intermediate plate 3 is a T-shaped structure, and the fixed plate 2 is an L-shaped structure.

[0047] It should be noted that the fixed plate 2 is located at both ends of the support horizontal plate 1, and the intermediate plate 3 is fixedly connected between the fixed plate 2 and the fixed plate 2, the intermediate plate 3 is a T-shaped structure, and the fixed plate 2 is an L-shaped structure. The fixed plate 2 and the intermediate plate 3 or the intermediate plate 3 and the intermediate plate 3 form a convex letter-shaped space. The test plate 4 is located in the convex letter-shaped space between the fixed plate 2 and the intermediate plate 3, and the distance between the upper ends of the fixed plate 2 and the intermediate plate 3 is slightly greater than the thickness of the test plate 4. The distance between the lower ends of the fixed plate 2 and the intermediate plate 3 is much greater than the thickness of the test plate 4. In the heating process, the heat transfer is facilitated, and the energy is saved; in the water quenching process, the flow of cooling water is facilitated, and the performance of the test plate 4 is ensured.

[0048] Specifically, the support horizontal plate 1, the fixed plate 2 and the intermediate plate 3 are combined.

[0049] It should be noted that when the special auxiliary is combined, it is more flexible and has stronger applicability, and the number of fixed plates 2 and intermediate plates 3 can be adjusted according to the number of test plates 4; after use, it can also be disassembled for storage.

[0050] Specifically, the fixed plate 2 and the intermediate plate 3 are the same shape, and the fixed plate 2 and the intermediate plate 3 are in sliding fit with the support horizontal plate 1.

[0051] Specifically, the fixed plate 2 and the intermediate plate 3 can also be different in shape, and can be adjusted according to actual needs, for example, the intermediate plate 3 is a T-shaped structure, and the fixed plate 2 is an L-shaped structure.

[0052] It should be noted that in order to facilitate storage and simplify the special auxiliary tool, the fixed plate 2 and the intermediate plate 3 can be designed to be the same size and do not need to be distinguished. When the special auxiliary tool is combined into a shape, the fixed plate 2 and the intermediate plate 3 can slide along the length direction of the support horizontal plate 1, and the distance between the fixed plate 2 and the intermediate plate 3 or the distance between the intermediate plate 3 and the intermediate plate 3 can be adjusted according to the thickness of the test plate 4, which is more flexible and diverse.

[0053] Specifically, sliding grooves 22 are formed on the support horizontal plate 1 along the length direction thereof, and sliding blocks 21 are fixed below the fixed plate 2 and the intermediate plate 3.

[0054] Specifically, the sliding grooves 22 and the sliding blocks 21 are in the shape of a convex character or a trapezoidal structure.

[0055] It should be noted that in order to realize that the fixed plate 2 and the intermediate plate 3 can slide along the length direction of the support horizontal plate 1, sliding grooves 22 need to be formed on the support horizontal plate 1, and sliding blocks 21 need to be provided below the fixed plate 2 and the intermediate plate 3. The shape of the sliding grooves 22 and the sliding blocks 21 is a convex character or a trapezoidal structure, which can realize sliding along the length direction of the support horizontal plate 1, and also can realize fixing in the width and height directions of the support horizontal plate 1, preventing the fixed plate 2 and the intermediate plate 3 from deviating when heated and water quenched.

[0056] Specifically, through holes 6 are formed at both ends of the fixed plate 2 and the intermediate plate 3, respectively, and grooves corresponding to the through holes 6 are formed on the support horizontal plate 1, and a fixed rod is inserted into the through holes 6 and the grooves, for fixing the fixed plate 2 and the intermediate plate 3 on the support horizontal plate 1.

[0057] It should be noted that in order to fix the fixed plate 2 and the intermediate plate 3 on the support horizontal plate 1, it is necessary to ensure that the distance between the fixed plate 2 and the intermediate plate 3 or the distance between the intermediate plate 3 and the intermediate plate 3 is slightly greater than the thickness of the test plate 4, so that through holes 6 are formed at both ends of the fixed plate 2 and the intermediate plate 3, respectively, and grooves corresponding to the through holes 6 are formed on the support horizontal plate 1.

[0058] In use, the sliding block 21 fixed on the fixed plate 2 and the intermediate plate 3 is inserted into the sliding groove 22 on the support horizontal plate 1, the distance between the fixed plate 2 and the intermediate plate 3 is adjusted through the sliding of the sliding block 21, the through hole 6 is coincided with the central axis of the groove, then the fixed rod is inserted from the direction of the through hole 6 and the groove, the fixed plate 2 and the intermediate plate 3 are fixed.

[0059] Preferably, the total number of the fixed plate 2 and the intermediate plate 3 is at least two.

[0060] It should be noted that when the total number of the fixed plate 2 and the intermediate plate 3 is two, including one fixed plate 2 and one intermediate plate 3, only one test plate 4 can be hoisted. When the total number of the fixed plate 2 and the intermediate plate 3 is three, including two fixed plates 2 and one intermediate plate 3, and the intermediate plate 3 is located between the two fixed plates 2, two test plates 4 can be hoisted. When the total number of the fixed plate 2 and the intermediate plate 3 is four, including two fixed plates 2 and two intermediate plates 3, and the intermediate plate 3 is located between the two fixed plates 2, three test plates 4 can be hoisted. By analogy, when the total number of the fixed plate 2 and the intermediate plate 3 is N or more, including two fixed plates 2 and N intermediate plates 3, N-1 test plates 4 can be hoisted.

[0061] Specifically, a plurality of overflow grooves 11 are arranged on the upper surface of the support horizontal plate 1, the overflow grooves 11 are located between the fixed plate 2 and the intermediate plate 3 or between the intermediate plate 3 and the intermediate plate 3, and are located below the test plate 4.

[0062] It should be noted that a plurality of overflow grooves 11 are arranged on the upper surface of the support horizontal plate 1, the overflow grooves 11 are rectangular, and the width thereof is less than the thickness of the test plate 4. The purpose of arranging the overflow grooves 11 is to facilitate heat transfer and save energy during heating, and to facilitate the flow of cooling water and ensure the performance of the test plate 4 during water quenching.

[0063] Specifically, a lifting lug 5 for lifting is arranged on the support horizontal plate 1 or the fixed plate 2.

[0064] Specifically, the center of the lifting lug 5 is vertically supported on the support horizontal plate 1 or the fixed plate 2, and the center of the lifting lug 5 is located in the middle upper part of the support horizontal plate 1 or the fixed plate 2.

[0065] Specifically, the number of the lifting lug 5 is at least two, and the lifting lug 5 is symmetrically arranged.

[0066] Specifically, the lifting lug 5 can be a single cylindrical structure or a double cylindrical structure, the double cylindrical structure is composed of a large-diameter cylinder and a small-diameter cylinder, and the small-diameter cylinder is fixedly connected with the support horizontal plate 1 or the fixed plate 2.

[0067] It should be noted that in order to facilitate the lifting of the crane or the trolley, the lifting lug 5 for lifting is arranged on the support horizontal plate 1 or the fixing plate 2. When the special auxiliary tool is integrally formed, the lifting lug 5 is fixedly connected to the fixing plate 2; when the special auxiliary tool is combined, the lifting lug 5 is fixedly connected to the support horizontal plate 1.

[0068] In order to more clearly describe the utility model, the following examples and comparative examples are further described.

[0069] Example 1

[0070] The special auxiliary tool comprises a support horizontal plate 1, a fixing plate 2 and an intermediate plate 3, and the support horizontal plate 1, the fixing plate 2 and the intermediate plate 3 are integrally formed. Figure 1 )

[0071] The support horizontal plate 1 is a cuboid;

[0072] The number of the fixing plate 2 is two, the fixing plate 2 is respectively located at both ends of the support horizontal plate 1, the fixing plate 2 is a cuboid, and the length of the fixing plate 2 is equal to the width of the support horizontal plate 1;

[0073] The number of the intermediate plate 3 is one, the intermediate plate 3 is located between the fixing plates 2, the intermediate plate 3 is a cuboid, and the length of the intermediate plate 3 is equal to the width of the support horizontal plate 1;

[0074] The intermediate plate 3 is a T-shaped structure, and the fixing plate 2 is an L-shaped structure. The fixing plate 2 and the intermediate plate 3 or the intermediate plate 3 and the intermediate plate 3 form a convex-shaped space; the test plate 4 is located between the fixing plate 2 and the intermediate plate 3, and the distance between the upper ends of the fixing plate 2 and the intermediate plate 3 is slightly greater than the thickness of the test plate 4. The distance between the lower ends of the fixing plate 2 and the intermediate plate 3 is much greater than the thickness of the test plate 4;

[0075] The fixing plate 2 is provided with a lifting lug 5 for lifting, the number of the lifting lug 5 is two, and the lifting lug 5 is symmetrically arranged, the lifting lug 5 is a double-cylinder structure, the double-cylinder structure is composed of a large-diameter cylinder and a small-diameter cylinder, and the small-diameter cylinder is fixedly connected to the fixing plate 2.

[0076] Use process:

[0077] Referring to Figure 2 Two special auxiliary tools are placed on the ground, and then the two ends of the two test plates 4 are respectively placed between the fixing plates 2 and the intermediate plates 3, the lifting lug 5 fixed on the fixing plate 2 is lifted by the crane or the trolley, the heating and water quenching of the test plate 4 are completed, and under the premise of ensuring product quality, the heat treatment efficiency of the large-thickness test plate 4 is increased, and the energy consumption is reduced.

[0078] Embodiment 2

[0079] Embodiment 2 is substantially the same as the preparation process of Embodiment 1, except that the special auxiliary tool in Embodiment 2 comprises support horizontal plate 1, fixed plate 2 and intermediate plate 3; and the special auxiliary tool is combined into shape (see Figure 3 and Figure 4 ).

[0080] Sliding grooves 22 are formed on the support horizontal plate 1 along the length direction thereof, and sliding blocks 21 are fixed below the fixed plate 2 and the intermediate plate 3, and the sliding blocks 21 correspond to the sliding grooves 22 one by one. The shape of the sliding grooves 22 and the sliding blocks 21 is convex structure; when the total number of the fixed plate 2 and the intermediate plate 3 is three, including two fixed plates 2 and one intermediate plate 3; the fixed plate 2 and the intermediate plate 3 are the same in shape, and the fixed plate 2 and the intermediate plate 3 slide on the support horizontal plate 1;

[0081] Both ends of the fixed plate 2 and the intermediate plate 3 are provided with through holes 6, and recesses corresponding to the through holes 6 are formed on the support horizontal plate 1,

[0082] A plurality of overflow grooves 11 are formed on the upper surface of the support horizontal plate 1, and the overflow grooves 11 are located between the fixed plate 2 and the intermediate plate 3 or between the intermediate plate 3 and the intermediate plate 3, and below the test plate 4;

[0083] The support horizontal plate 1 is provided with lifting lugs 5 for lifting, the number of the lifting lugs 5 is four, and the lifting lugs 5 are symmetrically arranged, the lifting lug 5 is double-cylinder structure, the double-cylinder structure is composed of a large-diameter cylinder and a small-diameter cylinder, and the small-diameter cylinder is fixedly connected with the support horizontal plate 1.

[0084] Assembly process:

[0085] Place the support horizontal plate 1 on the ground, insert the sliding blocks 21 fixedly connected with the fixed plate 2 and the intermediate plate 3 into the sliding grooves 22 on the support horizontal plate 1, adjust the distance between the fixed plate 2 and the intermediate plate 3 by sliding the sliding blocks 21, and make the through holes 6 coincide with the center axis of the recesses, then insert the fixed rod from the direction of the through holes 6 and the recesses, to fix the fixed plate 2 and the intermediate plate 3.

[0086] When the special auxiliary tool is used, the fixed plate 2 and the intermediate plate 3 can be removed from the support horizontal plate 1 for storage.

[0087] Use process:

[0088] Two special auxiliary tools are placed on the ground, and then two ends of the two test plates 4 are respectively placed between the fixed plate 2 and the middle plate 3, and the lifting lug 5 fixed on the fixed plate 2 is hoisted by a crane or a travelling crane, so that the heating and water quenching of the test plate 4 are completed, and on the premise of ensuring the product quality, the heat treatment efficiency of the large-thickness test plate 4 is increased, and the energy consumption is reduced.

[0089] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A special fixture for heat treatment of large thickness test panels (4) characterized in that, The special auxiliary tool comprises a support horizontal plate (1), a fixed plate (2) and an intermediate plate (3); The support horizontal plate (1) is a cuboid; The fixed plate (2) is a cuboid, and the length of the fixed plate (2) is equal to or less than the width of the support horizontal plate (1); The intermediate plate (3) is a cuboid, and the length of the intermediate plate (3) is equal to or less than the width of the support horizontal plate (1); The test plate (4) is located between the fixed plate (2) and the intermediate plate (3), and the distance between the fixed plate (2) and the intermediate plate (3) is slightly greater than the thickness of the test plate (4).

2. The special aid for heat treatment of large thickness test plate (4) according to claim 1, characterized in that, The support horizontal plate (1), the fixed plate (2) and the intermediate plate (3) are integrally formed.

3. The special aid for heat treatment of large thickness test plate (4) according to claim 2, characterized in that, The fixed plate (2) and the intermediate plate (3) form a convex-shaped space.

4. The special aid for heat treatment of large thickness test plate (4) according to claim 1, characterized in that, The support horizontal plate (1), the fixed plate (2) and the intermediate plate (3) are integrally formed.

5. The special aid for heat treatment of large thickness test plate (4) according to claim 4, characterized in that, The fixed plate (2) and the intermediate plate (3) are the same shape, and the fixed plate (2) and the intermediate plate (3) are in sliding fit with the support horizontal plate (1).

6. The special aid for heat treatment of large thickness test plate (4) according to claim 4, characterized in that, Sliding grooves (22) are formed on the support horizontal plate (1) along the length direction thereof, and sliding blocks (21) are fixed below the fixed plate (2) and the intermediate plate (3).

7. The special aid for heat treatment of large thickness test plate (4) according to claim 4, characterized in that, A through hole (6) is formed at each end of the fixed plate (2) and the intermediate plate (3), and a recess corresponding to the through hole (6) is formed on the support horizontal plate (1), a fixed rod is inserted into the through hole (6) and the recess, and the fixed plate (2) and the intermediate plate (3) are fixed on the support horizontal plate (1).

8. The special aid for heat treatment of large thickness test plate (4) according to claim 4, characterized in that, The total number of the fixed plate (2) and the intermediate plate (3) is at least two.

9. The special aid for heat treatment of large thickness test plate (4) according to claim 4, characterized in that, A plurality of overflow grooves (11) are formed on the upper surface of the support horizontal plate (1), the overflow grooves (11) are located between the fixed plate (2) and the intermediate plate (3) or between the intermediate plate (3) and the intermediate plate (3), and are located below the test plate (4).

10. The special aid for heat treatment of large thickness test plate (4) according to claim 1, characterized in that, A lifting lug (5) for lifting is arranged on the support horizontal plate (1) or the fixed plate (2).

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