CN116356132A - Ceramic protection device for postweld heat treatment process and postweld heat treatment equipment - Google Patents

Abstract

The invention provides a ceramic protection device for a postweld heat treatment process and postweld heat treatment equipment. The ceramic protection device comprises a plurality of first ceramic heat transfer protection plates and a plurality of second ceramic heat transfer protection plates, wherein two ends of two opposite side edges of the first ceramic heat transfer protection plates are respectively and movably connected with one side top end of the adjacent second ceramic heat transfer protection plates, so that the first ceramic heat transfer protection plates and the second ceramic heat transfer protection plates form a staggered laminated structure; in the post-weld heat treatment process, the ceramic protection device is fixedly connected with the electric heating device and is positioned between the electric heating device and the post-weld heat treatment workpiece, wherein the electric heating device is used for providing a heat source for the post-weld heat treatment workpiece. By isolating the electric heating device from the workpiece, the heating effect and efficiency are not affected, and the possibility that the electric arc damages the workpiece is greatly reduced, so that the cost and the manufacturing period are reduced, the repairing times are reduced, and better guarantee is provided for the product quality.

Description

Ceramic protection device for postweld heat treatment process and postweld heat treatment equipment

Technical Field

The specification relates to the technical field of welding, in particular to a ceramic protection device for a postweld heat treatment process and postweld heat treatment equipment.

Background

After the welding of the workpieces is finished, some workpieces cannot use a furnace feeding process because of special shapes, sizes or welding seams, such as product workpieces of container part assemblies, in-pile components and the like of second-generation, third-generation and novel fourth-generation thermal nuclear reactors, and when the welding seams are subjected to heat treatment after welding, only an electric heating device can be paved on the surfaces of the workpieces to carry out heat treatment after welding. The electric heating device adopts the ceramic electric heating plate that the inside cover was equipped with the resistance wire more, thereby because the resistance wire can produce local magnetic field and attracts the metal dust on every side, the circumstances that damage probably appears to outside ceramic material can take place, when electric heating plate spreads the subsides on work piece surface, can take place the short circuit, makes the work piece by electric arc to hit the wound, influences product quality, and impaired position needs to repair, not only influences production entering and product shipment, can cause economic loss moreover.

Disclosure of Invention

In view of this, the embodiments of the present disclosure provide a ceramic protection device for a post-weld heat treatment process and a post-weld heat treatment apparatus, where the ceramic protection device can effectively prevent a workpiece from being damaged by an arc during a weld heat treatment, and ensure product quality and production efficiency.

The embodiment of the specification provides the following technical scheme:

the ceramic protection device comprises a plurality of first ceramic heat transfer protection plates and a plurality of second ceramic heat transfer protection plates, wherein two ends of two opposite side edges of the first ceramic heat transfer protection plates are respectively and movably connected with one side top end of the adjacent second ceramic heat transfer protection plates, so that the first ceramic heat transfer protection plates and the second ceramic heat transfer protection plates form a staggered laminated structure;

in the postweld heat treatment process, the ceramic protection device is fixedly connected with the electric heating device and is positioned between the electric heating device and the postweld heat treatment workpiece, wherein the electric heating device is used for providing a heat source for the postweld heat treatment workpiece.

The ceramic protection device using the postweld heat treatment process can connect any number of first ceramic heat transfer protection sheets and a plurality of second ceramic heat transfer protection sheets, is convenient to assemble and configure, can be suitable for workpieces of various shapes and structures, has the overall shape which can be adjusted according to the shape of the workpiece and the shape of the electric heating device, forms good adhesion with the workpiece, works together with the electric heating device, does not affect postweld heat treatment, and can prevent the metal powder or damaged heating resistance wires adsorbed by the electric heating device from directly contacting the surface of the workpiece by being matched with the electric heating device, so that the workpiece is prevented from being damaged by electric arcs.

In a preferred embodiment, the first ceramic heat transfer protective sheet and/or the second ceramic heat transfer protective sheet comprises a hollow structure surrounded by its side walls.

In a preferred embodiment, a first through-hole is provided near the side wall of the electric heating device, a second through-hole corresponding to the first through-hole is provided near the side wall of the post-weld heat treatment workpiece, and the diameter of the first through-hole is larger than that of the second through-hole.

In a preferred embodiment, the first ceramic heat transfer protection sheet is movably connected to the edge of the hollow structure of the second ceramic heat transfer protection sheet through a connection post, the connection post is provided with a via hole, and a metal wire is arranged in the via hole in a penetrating manner so as to at least connect adjacent first ceramic heat transfer protection sheets.

In a preferred embodiment, the circumferential inflection point of the side wall is circular arc-shaped.

In a preferred embodiment, the first ceramic heat transfer protective sheet and/or the second ceramic heat transfer protective sheet is configured to: the length is about 20mm, the width is about 20mm, and the thickness is about 5mm.

The embodiment of the specification also provides postweld heat treatment equipment, which comprises the ceramic protection device and an electric heating device fixedly connected with the ceramic protection device, wherein the electric heating device comprises a plurality of first electric heating plates and a plurality of second electric heating plates, and two ends of two opposite side edges of the first electric heating plates are respectively and movably connected with one side top end of the adjacent second electric heating plate, so that the first electric heating plates and the second electric heating plates form a staggered lamination structure.

In a preferred embodiment, the first electrical heating sheet is disposed in correspondence with and is similar in size to the first ceramic heat transfer protective sheet, and the second electrical heating sheet is disposed in correspondence with and is similar in size to the second ceramic heat transfer protective sheet.

In a preferred embodiment, the first ceramic heat transfer protection sheet and/or the second ceramic heat transfer protection sheet is provided with fixing holes for connecting connection holes provided to the electric heating device by fixing bolts.

In a preferred embodiment, the electric heating device comprises a resistance wire and a ceramic shell coated outside the resistance wire, and the material of the first ceramic heat transfer protection sheet and/or the material of the second ceramic heat transfer protection sheet are the same as the material of the ceramic shell.

Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least: through increasing ceramic protection device, make between electric heating device and the work piece by ceramic protection device isolation, under the prerequisite that does not influence effect and the efficiency of heating, greatly reduced the electric arc and hit the possibility of damaging the work piece to reduce cost and manufacturing cycle, reduce the number of times of reprocessing, provide better guarantee for product quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a post-weld heat treatment apparatus with a ceramic protector installed, as viewed from the ceramic protector side;

FIG. 2 is a perspective view of a post-weld heat treatment apparatus with a ceramic protector installed, from the side of the electric heating device;

FIG. 3 is a schematic view of a ceramic protection device;

FIG. 4 is a schematic perspective view of the first ceramic heat transfer protective sheet from the top;

FIG. 5 is a schematic perspective view of a second ceramic heat transfer protective sheet from the bottom;

FIG. 6 is a schematic illustration of a wire threaded through a ceramic heat transfer protective sheet;

FIG. 7 is a schematic view of an electric heating apparatus;

FIG. 8 is a side perspective view of a fixing bolt;

the reference numerals used in the drawings are as follows:

10. the ceramic heat transfer protection plate comprises a first ceramic heat transfer protection plate body, 11, connecting columns, 12, through holes, 13, side walls, 14, hollow structures, 16, a first heat through hole, 17, a second heat through hole, 20, a second ceramic heat transfer protection plate body, 30, a metal wire, 40, a first electric heating plate body, 45, a connecting hole, 50, a second electric heating plate body, 60, a resistance wire, 70, a ceramic shell body, 80, a fixing bolt, 100, a ceramic protection device, 200 and an electric heating device.

Detailed Description

Embodiments of the present application are described in detail below with reference to the accompanying drawings.

Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, apparatus may be implemented and/or methods practiced using any number and aspects set forth herein. In addition, such apparatus may be implemented and/or such method practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

It is to be understood that "connection of component a to component B" means that component a is directly in contact with component B or that component a is indirectly connected to component B via other components. The terms "upper", "lower", "inner", "outer", "side", and the like, as described in the exemplary embodiments of the present specification, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present specification.

In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

The heat exchange system of the nuclear power device is an important system of the nuclear power device, wherein the pressure vessels of the pressurized water reactors such as the second generation reactor and the third generation reactor, the evaporator cylinder body, the novel fourth generation reactor and other parts are required to be subjected to heat treatment after welding, the welding seam at part of the positions cannot enter a furnace to be subjected to heat treatment after welding only by adopting a mode of paving an electric heating plate, and the condition that a workpiece is damaged by electric arc can occur in the heat treatment process.

To prevent the occurrence of arc striking, it is generally achieved by repeatedly checking whether an electric heating device is in a damaged state and controlling the cleanliness of a heat treatment site. This requires not only a special heat treatment site but also a careful inspection of the electric heating device after laying. When facing larger equipment, the special heat treatment field and the electric heating sheet on the inspected product all need larger workshop field, a large amount of manpower and material resources investment and cost support, which clearly increases the manufacturing period and cost, and if the two requirements cannot be met, the possibility of arc damage will appear greatly.

After finding the cause, it is found that the electric heating device directly performs heat treatment to generate electric arc, so as to damage the workpiece, and the electric heating device mainly comprises the following two possibilities of generating damage phenomena:

(1) In the process of arranging and paving the electric heating plates of the electric heating device, the outer ceramic plates are damaged due to various unexpected reasons, so that the resistance wires are leaked outwards and touch or are close to a workpiece, and short circuit occurs to cause the workpiece to be damaged by electric arc;

(2) In the heat treatment process, the resistance wire of the electric heating device is electrified to generate a local magnetic field, the magnetic field can adsorb metal dust in a workshop, and the dust is locally accumulated to form a short circuit with a workpiece, so that the workpiece is damaged by an electric arc.

The damage condition not only affects the quality of the product and causes repair, but also causes economic loss due to repair, and affects the manufacturing progress and the product delivery.

In order to solve the problems, the invention provides a ceramic protection device for a post-welding heat treatment process and post-welding heat treatment equipment using the ceramic protection device. The connecting structure of the ceramic protection device is similar to a rolling curtain structure, and the first heat transfer protection piece and the second heat transfer protection piece which are similar in shape are arranged to form a staggered laminated structure, so that the ceramic protection device is suitable for workpieces with different shapes. When the post-welding heat treatment process is carried out, the ceramic protection device is fixed on the inner side of the electric heating device and then is abutted against the surface of the workpiece, the electric heating device is isolated from the workpiece, the local accumulation of metal dust is avoided on the premise that the heating effect and the heating efficiency are not affected, and even if the surface of the electric heating device is damaged, the resistance wire inside the electric heating device is not in direct contact with the workpiece, so that the possibility that the workpiece is damaged by electric arcs is greatly reduced.

The following describes the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

The invention provides a ceramic protection device for a postweld heat treatment process, which is used as a protection device for the postweld heat treatment which cannot enter a furnace. As shown in fig. 1 and 2, when the ceramic protecting device 100 is fixed to the electric heating device 200 and the electric heating device 200 is laid on the periphery of the workpiece, the ceramic protecting device 100 may be laid on the workpiece, then the electric heating device 200 may be laid outside, and finally the ceramic protecting device 100 and the electric heating device 200 may be fixed to each other.

As shown in fig. 3, the ceramic protection device 100 includes a plurality of ceramic heat transfer protection plates, specifically includes a plurality of first ceramic heat transfer protection plates 10 and a plurality of second ceramic heat transfer protection plates 20, where two opposite sides of the first ceramic heat transfer protection plates 10, for example, two opposite sides of the ceramic protection device 100 in fig. 3, are respectively movably connected to one top end of each side of the adjacent second ceramic heat transfer protection plates 20, and the first ceramic heat transfer protection plates 10 and the second ceramic heat transfer protection plates 20 are sequentially connected in the above-mentioned movable connection manner, so that the first ceramic heat transfer protection plates 10 and the second ceramic heat transfer protection plates 20 form a staggered lamination structure. The structure can adapt to workpieces with different shapes, and is convenient to pave and paste on the surface of the workpiece.

When the post-welding heat treatment process is performed, the ceramic protection device 100 is fixedly connected with the electric heating device 200 and is positioned between the electric heating device 200 and the post-welding heat treatment workpiece, and as the ceramic protection device 100 is abutted against the surface of the workpiece and forms good contact with the workpiece, the electric heating device 200 is used as a heat source for the post-welding heat treatment workpiece, and the heat of the electric heating device can be effectively transferred to the workpiece, so that the heating effect and the heating efficiency are ensured.

As shown in fig. 6, the first ceramic heat transfer protective sheet 10 and the second ceramic heat transfer protective sheet 20 may be connected to each other by a connection wire. Taking the wire 30 shown in fig. 6 as an example, the first ceramic heat transfer protection sheet 10 and the second ceramic heat transfer protection sheet 20 are each provided with a connection hole through which the wire 30 passes, and the ceramic protection device 100 may be assembled by referring to the following steps:

step 1, one end of a metal wire 30 penetrates through a connecting hole in a first ceramic heat transfer protection sheet 10 and then penetrates through a connecting hole in a second ceramic heat transfer protection sheet 20, and the first ceramic heat transfer protection sheet 10 and the second ceramic heat transfer protection sheet 20 are not penetrated into the metal wire 30 and are far away from each other;

step 2, repeating the steps until a preset number of first ceramic heat transfer protection sheets 10 and second ceramic heat transfer protection sheets 20 are sequentially penetrated;

step 3, extracting the metal wire 30 to a preset length from the first ceramic heat transfer protective sheet 10 at the most side, bending the metal wire 30 to 180 degrees at the extraction position, and sequentially penetrating the end of the metal wire 30 into the other connecting holes of the first ceramic heat transfer protective sheet 10 and the second ceramic heat transfer protective sheet 20;

and 4, mutually closing and abutting each first ceramic heat transfer protective sheet 10 and each second ceramic heat transfer protective sheet 20. It should be further noted that the first ceramic heat transfer protective sheet 10 and the second ceramic heat transfer protective sheet 20 may be provided with movable positioning structures, such as a connection post and a connection groove, and the connection post is clamped in the connection groove, so as to form a more stable structure.

And (3) repeating the steps 1 to 4 to obtain the ceramic heat transfer protection sheet with multiple layers of staggered movable connection.

By using the ceramic protection device, the electric heating device 200 and the workpiece to be heat-treated are isolated, so that the direct contact or the too close distance between the electric heating device 200 and the workpiece is avoided, the exposed metal at the damaged position on the electric heating device 200 or the generated local magnetic field attracts metal powder to contact the workpiece, the surface of the workpiece caused by short circuit is prevented from being damaged, the product quality is ensured, the repairing probability is reduced, the production efficiency and the delivery time are ensured, and the economic loss caused by reworking is saved.

In some embodiments, as shown in fig. 1, 2 and 5, the first ceramic heat transfer protective sheet 10 includes a hollow structure 14 surrounded by its sidewalls 13. Likewise, the second ceramic heat transfer protective sheet 20 may be of the same construction and also include a hollow structure 14 surrounded by its side walls 13. The first ceramic heat transfer protective sheet 10 and the second ceramic heat transfer protective sheet 20 may be provided with the hollow structure 14 at the same time, or the hollow structure 14 may be provided only in one of the first ceramic heat transfer protective sheet 10 or the second ceramic heat transfer protective sheet 20.

Preferably, the thickness of the hollow structure 14 is 1/3 of the thickness of the ceramic heat transfer protective sheet. More preferably, the thickness of the hollow structure 14 is the same as the thickness of the side walls 13 on both sides thereof, i.e., the hollow structure 14 and the side walls 13 on both sides thereof equally divide the thickness of the ceramic heat transfer protection sheet as a whole.

In some embodiments, on the basis of providing the hollow structure 14, heat through holes for heat transfer may be further formed in the side walls of both sides of the hollow structure 14. Specifically, taking the example that the first ceramic heat transfer protection sheet 10 is provided with heat through holes, as shown in fig. 5, the side wall of the second ceramic heat transfer protection sheet 20, which is close to the electric heating device 200, is provided with a first heat through hole 16, the side wall of the second ceramic heat transfer protection sheet, which is close to the post-welding heat treatment workpiece, is provided with a second heat through hole 17, and the first heat through hole 16 and the second heat through hole 17 are correspondingly arranged, and the diameter of the first heat through hole 16 is larger than that of the second heat through hole 17. Similarly, the first ceramic heat transfer protective sheet 10 having the hollow structure 14 may be provided with the first heat transfer holes 16 and the second heat transfer holes 17 having the same structure. Because the two heat through holes form a divergent structure, the uniform heat transfer from the electric heating plate to the workpiece can be realized, and the effect and the efficiency of the electric heating plate for heating the workpiece can not be influenced.

Preferably, the first and second heat passing holes 16 and 17 are provided at the central position of the side wall of the ceramic heat transfer protection sheet.

In some embodiments, as shown in fig. 4 and 6, a connection post 11 is provided on a connection end surface of one side of the first ceramic heat transfer protection sheet 10, and the first ceramic heat transfer protection sheet 10 is movably connected to edges of the hollow structure 14 of the second ceramic heat transfer protection sheet 20 (e.g., edges of left and right ends of the hollow structure 14 in fig. 5) through the connection post 11, thereby relatively fixing the first ceramic heat transfer protection sheet 10 and the second ceramic heat transfer protection sheet 20. Also in the connection post 11 are through holes 12, and the metal wires 30 are arranged through the through holes 12 to connect at least two adjacent first ceramic heat transfer protection sheets 10, or connect all or a plurality of first ceramic heat transfer protection sheets 1 on the same straight line, or connect all the first ceramic heat transfer protection sheets 10, so that the adjacent first ceramic heat transfer protection sheets 10 can be abutted against the second ceramic heat transfer protection sheets 20 from two sides.

In some embodiments, as shown in fig. 1, 2, 5 and 6, the circumferential inflection point of the sidewall 13 is circular arc-shaped. By setting the turning position to be circular arc, the ceramic protecting device 100 can be better attached to the surface of the workpiece; and when the electric heating device 200 is composed of a plurality of electric heating sheets in a staggered laminated structure, the ceramic protecting device 100 having the circular arc-shaped side wall 13 is better abutted against the surface of the electric heating device 200.

In some embodiments, upon placement of the hollow structure 14, the first ceramic heat transfer protective sheet 10 and/or the second ceramic heat transfer protective sheet 20 are configured to: the length is about 20mm, the width is about 20mm, and the thickness is about 5mm. Through above-mentioned size setting, the thickness of ceramic heat transfer protection piece is thin, and inside is hollow structure, and light, occupation space is less, does not influence the laying of electrical heating board, and this thickness can effectively keep apart electrical heating board and work piece, prevents its direct contact, avoids the short circuit to take place.

It should be noted that, at least one of the first ceramic heat transfer protective sheet 10 and the second ceramic heat transfer protective sheet 20 may be configured according to the above-mentioned size structure, and specific length, width, and thickness dimensions may be adjusted without reference to the ceramic heat transfer protective sheet configured in the size, so as to better adapt to workpieces of different shapes; in addition, the first ceramic heat transfer protective sheet 10 and the second ceramic heat transfer protective sheet 20 may be both provided with the above-described dimensions.

Based on the same inventive concept, the present embodiment also provides a post-welding heat treatment apparatus, which includes the ceramic protection device 100 in any one of the above embodiments, and the electric heating device 200 connected to the ceramic protection device 100, as shown in fig. 7, where the electric heating device 200 includes a plurality of first electric heating sheets 40 and a plurality of second electric heating sheets 50, and two ends of opposite side edges of the first electric heating sheets 40 are respectively movably connected to one side top end of the adjacent second electric heating sheets 50, so that the first electric heating sheets 40 and the second electric heating sheets 50 form a staggered lamination structure.

The beneficial effects of the post-welding heat treatment apparatus described above may refer to the effects of the ceramic protection device in the foregoing embodiments, and will not be described herein.

Preferably, the first electric heating sheet 40 is disposed corresponding to and sized similarly to the first ceramic heat transfer protective sheet 10, and the second electric heating sheet 50 is disposed corresponding to and sized similarly to the second ceramic heat transfer protective sheet 20. Through the arrangement of the structure, the electric heating plates and the ceramic heat transfer protection plates are in one-to-one correspondence, so that the electric heating plates are convenient to lay, and the electric heating plates are beneficial to effectively transferring heat to a workpiece.

In some embodiments, the first ceramic heat transfer protection sheet 10 and/or the second ceramic heat transfer protection sheet 20 are provided with fixing holes, for example, the inner wall of the first through-hole 16 or the second through-hole 17 is threaded, and at the same time, the connecting holes 45 (shown in fig. 2) are formed at positions on the first electric heating sheet 40 and/or the second electric heating sheet 50 corresponding to the threaded through-holes, and the fixing holes and the connecting holes 45 are fixedly connected using bolts 80 (shown in fig. 1, 2 and 8), so that the ceramic protection device 100 and the electric heating device 200 are detachably connected to each other.

In some embodiments, the electrical heating device 200 includes a resistance wire 60 and a ceramic housing 70 (shown in fig. 7) that is wrapped around the exterior of the resistance wire 60, and at least one or both of the first ceramic heat transfer protective sheet 10, the second ceramic heat transfer protective sheet 20 is the same material as the ceramic housing 70.

In this specification, identical and similar parts of the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The ceramic protection device is characterized by comprising a plurality of first ceramic heat transfer protection pieces and a plurality of second ceramic heat transfer protection pieces, wherein two ends of two opposite side edges of the first ceramic heat transfer protection pieces are respectively and movably connected with one side top end of the adjacent second ceramic heat transfer protection pieces, so that the first ceramic heat transfer protection pieces and the second ceramic heat transfer protection pieces form a staggered laminated structure;

in the postweld heat treatment process, the ceramic protection device is fixedly connected with the electric heating device and is positioned between the electric heating device and the postweld heat treatment workpiece, wherein the electric heating device is used for providing a heat source for the postweld heat treatment workpiece.

2. The post-weld heat treatment process ceramic protector according to claim 1, wherein the first ceramic heat transfer protector sheet and/or the second ceramic heat transfer protector sheet comprises a hollow structure surrounded by its side walls.

3. The post-weld heat treatment process ceramic protection device according to claim 2, wherein a first heat passing hole is provided near a side wall of the electric heating device, a second heat passing hole corresponding to the first heat passing hole is provided near a side wall of the post-weld heat treatment workpiece, and a diameter of the first heat passing hole is larger than that of the second heat passing hole.

4. The post-weld heat treatment process ceramic protector according to claim 2, wherein the first ceramic heat transfer protective sheet is movably connected to the edge of the hollow structure of the second ceramic heat transfer protective sheet through a connecting post, the connecting post is provided with a via hole, and a wire is inserted into the via hole to connect at least adjacent first ceramic heat transfer protective sheets.

5. The post-weld heat treatment process ceramic protector according to claim 2, wherein the surrounding inflection point of the sidewall is circular arc.

6. The post-weld heat treatment process ceramic protection device of claim 2, wherein the first ceramic heat transfer protection sheet and/or the second ceramic heat transfer protection sheet are configured to: the length is about 20mm, the width is about 20mm, and the thickness is about 5mm.

7. A post-weld heat treatment apparatus, comprising a ceramic protection device according to any one of claims 1 to 6, and an electric heating device fixedly connected to the ceramic protection device, wherein the electric heating device comprises a plurality of first electric heating plates and a plurality of second electric heating plates, and two ends of opposite side edges of the first electric heating plates are respectively and movably connected to one side top end of the adjacent second electric heating plate, so that the first electric heating plates and the second electric heating plates form a staggered laminated structure.

8. The post-weld heat treatment apparatus of claim 7, wherein the first electrical heating sheet is disposed in a similar size to the first ceramic heat transfer protective sheet and the second electrical heating sheet is disposed in a similar size to the second ceramic heat transfer protective sheet.

9. The post-weld heat treatment apparatus according to claim 7, wherein the first ceramic heat transfer protection sheet and/or the second ceramic heat transfer protection sheet is provided with fixing holes for connecting connection holes provided to the electric heating device by fixing bolts.

10. The post-weld heat treatment apparatus according to claim 7, wherein the electric heating device comprises a resistance wire and a ceramic shell coated outside the resistance wire, and the material of the first ceramic heat transfer protective sheet and/or the second ceramic heat transfer protective sheet is the same as the material of the ceramic shell.

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