Electric heating element suitable for reactor core simulation device, reactor core simulation device and assembling method of reactor core simulation device

Abstract

The embodiment of the invention relates to the technical field of rod-shaped or tubular heating elements, in particular to an electric heating piece suitable for a reactor core simulation device, the reactor core simulation device and an assembling method of the reactor core simulation device. The reactor core simulation device comprises a cladding tube fixing piece and a cladding tube fixed on the cladding tube fixing piece; the electric heating piece comprises an electric heating wire, an insulation fixing piece, a first wire, a second wire and a wire insulation piece. The insulation fixing piece is arranged to be capable of being integrated with the electric heating wire, and the insulation fixing piece has a shape matched with the cladding tube, so that the insulation fixing piece can be inserted into the cladding tube through the open end, insulates the electric heating wire from the cladding tube and can be pulled out from the open end of the cladding tube; the first wire and the second wire are used for being electrically connected with the electric heating wire outside the insulating fixing piece. And the wire insulating part is used for insulating and separating the first wire from the second wire outside the open end of the cladding tube. The electric heating element provided by the invention is convenient to disassemble and assemble with the reactor core simulation device, and is beneficial to avoiding waste.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of rod-shaped or tubular heating elements, and particularly to an electric heating element applicable to a core simulation device, a core simulation device, and an assembly method thereof. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] To study certain characteristics of the core, relevant experimental studies are usually carried out by using electric heating instead of nuclear heating in the early stage. A core that uses electric heating instead of nuclear heating is called a core simulation device, and specifically, the core power distribution is simulated by arranging an electric heating element in the core container. At present, there are still many problems with the core simulation device. Summary of the Invention

[0004] A brief overview of the present application is given below to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is only to present certain concepts in a simplified form as a prelude to the more detailed description to be discussed later.

[0005] In a first aspect, embodiments of the present application provide an electric heating element applicable to a core simulation device, and the core simulation device includes: a cladding tube fixing member and a cladding tube fixed to the cladding tube fixing member, one end of the cladding tube being an open end and the other end being a closed end; the electric heating element includes: an electric heating wire, an insulating fixing member, a first wire, a second wire, and a wire insulating member. The insulating fixing member is configured to be integrally formed with the electric heating wire, and the insulating fixing member has a shape adapted to the cladding tube so as to be inserted into the cladding tube through the open end, insulate the electric heating wire from the cladding tube, and be pulled out of the open end of the cladding tube. The first wire and the second wire are used for electrically connecting to the electric heating wire outside the insulating fixing member. The wire insulating member is used for insulating and separating the first wire and the second wire outside the open end of the cladding tube.

[0006] In a second aspect, embodiments of the present application further provide a core simulation device, which includes: a cladding tube fixing member and a plurality of cladding tubes fixed to the cladding tube fixing member, and the electric heating element according to any one of the first aspects of the present application. One end of the cladding tube is an open end and the other end is a closed end. Each electric heating element is used to be inserted into the open end of a corresponding cladding tube.

[0007] Thirdly, an embodiment of the present application further provides an assembling method for a core simulation device, where the core simulation device is the core simulation device of the second aspect of the present application. The assembling method includes: S1. Assemble the electric heating element of any embodiment of the first aspect of the present application on each cladding tube. Wherein, after each second wire passes through the second through-hole, it continues to extend upward in the vertical direction, and each first wire bends at a height of the second insulating member lower than the wire insulating member after passing through the first through-hole and extends in the horizontal direction; S2. Divide all the cladding tubes into multiple regions along the circumferential direction of the cladding tube fixing member around the center of the cladding tube fixing member, arrange the first through-holes of the electric heating elements in each region in the same direction, and adjust the extending directions of the first wires of the electric heating elements in each region to be parallel to each other and perpendicular to the direction of the connection line between the first through-hole and the second through-hole; wherein, the direction of the connection line between the first through-hole and the second through-hole is not perpendicular to the outermost side of the region; S3. Conductively connect the second wire of each electric heating element to one polarity of the power supply, and conductively connect each first wire to the other polarity of the power supply outside the cladding tube fixing member.

[0008] Compared with the existing armored structure type electric heating element, the electric heating element of the embodiment of the present application is equivalent to setting the heating main body structure (i.e., the electric heating wire and the insulating fixing member) and the heating cladding (i.e., the cladding tube) as a split structure, and fixing the cladding tube to the cladding tube fixing member of the core simulation device. By inserting the insulating fixing member into the open end of the cladding tube, the assembly between the electric heating element and the core simulation device can be realized; and when the heating main body structure fails and needs to be replaced, the insulating fixing member can be directly pulled out from the cladding tube, which is convenient for the disassembly operation of the electric heating element and the core simulation device. Since the cladding tube can be reused and there is no need to perform destructive disassembly on the core simulation device, unnecessary waste of resources can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Through the description of the embodiments of the present application with reference to the accompanying drawings below, other objects and advantages of the present application will be obvious and can help to have a comprehensive understanding of the present application.

[0010] Figure 1 is a schematic structural diagram after the electric heating element and the cladding tube of the core simulation device are assembled according to the embodiment of the present application;

[0011] Figure 2 is Figure 1 a cross-sectional view after the electric heating element and the cladding tube of the core simulation device shown in

[0012] Figure 3 is Figure 2 an enlarged view of area A of

[0013] Figure 4Is a cross-sectional view of a wire insulator according to an embodiment of the present application;

[0014] Figure 5 Is a top view schematic diagram of a wire insulator according to an embodiment of the present application;

[0015] Figure 6 Is a partial top view schematic diagram of a core simulation device before assembling an electric heating element according to an embodiment of the present application;

[0016] Figure 7 Is a partial top view schematic diagram of a core simulation device after assembling an electric heating element according to an embodiment of the present application.

[0017] Explanation of reference numerals in the drawings:

[0018] 1. Cladding tube; 101. Open end; 102. Closed end;

[0019] 2. Cladding tube fixing member; 21. First sector; 22. Second sector;

[0020] 11. Electric heating wire; 111. Heating section; 112. Lead wire; 12. Insulating fixing member; 121. Insulating rod; 122. Insulating connecting member; 1221. Insulating through hole;

[0021] 20. First wire; 30. Second wire; 40. Wire insulator; 41. First insulator; 411. First through hole; 412. Second through hole; 42. Second insulator.

[0022] It should be noted that the drawings are not necessarily drawn to scale, but are shown only in a schematic manner that does not affect the reader's understanding. Detailed implementation manners

[0023] In the following, exemplary embodiments of the present application will be described in conjunction with the drawings. For clarity and conciseness, not all features of the actual implementation manners are described in the specification. However, it should be understood that many implementation-specific decisions must be made during the development of any such actual implementation manner in order to achieve the developer's specific goals, for example, to comply with those limitations related to the system and business, and such limitations may vary with different implementation manners. In addition, it should also be understood that although the development work may be very complex and time-consuming, for those skilled in the art who benefit from the content of the present application, such development work is merely a routine task.

[0024] Here, it should also be noted that in order to avoid obscuring the present application due to unnecessary details, only the device structures and / or processing steps closely related to the solution according to the present application are shown in the drawings, while other details less related to the present application are omitted.

[0025] The electric heating elements currently used in the core simulation device are usually of a sheathed structure in which the sheathed casing and the heating core are integrally formed, and the sheathed casing is welded to the casing tube fixing member of the core simulation device. The inventor of the present application has found that the heating core of the electric heating element, as the main heating structure, is more prone to failure and has a shorter service life compared to the sheathed casing. If the heating core fails, it is necessary to disassemble the integrally formed sheathed structure as a whole from the core simulation device for replacement, which has problems such as greater disassembly difficulty and easy waste of resources.

[0026] Based on this, an embodiment of the present application provides an electric heating element applicable to a core simulation device.

[0027] As Figure 1 and Figure 2 shown, Figure 1 is a schematic structural view of the electric heating element and the casing tube of the core simulation device assembled according to the embodiment of the present application; Figure 2 is Figure 1 a cross-sectional view of the electric heating element and the casing tube of the core simulation device assembled as shown; The core simulation device of the embodiment of the present application may include: a casing tube fixing member and a casing tube 1 fixed to the casing tube fixing member. One end of the casing tube 1 is an open end 101, and the other end is a closed end 102.

[0028] The electric heating element of the embodiment of the present application includes: an electric heating wire 11, an insulating fixing member 12, a first wire 20, a second wire 30, and a wire insulating member 40. The insulating fixing member 12 is arranged to be able to form an integral body with the electric heating wire 11. The insulating fixing member 12 has a shape adapted to the casing tube 1 so as to be inserted into the casing tube 1 through the open end 101 and insulate the electric heating wire 11 from the casing tube 1; and can be pulled out from the open end 101 of the casing tube 1. The first wire 20 and the second wire 30 are used to conductively connect with the electric heating wire 11 outside the insulating fixing member 12. The wire insulating member 40 is used to insulate and separate the first wire 20 and the second wire 30 outside the open end 101 of the casing tube 1.

[0029] The electric heating element applicable to the core simulation device provided by the embodiment of the present application, by providing the electric heating wire 11 and the insulating fixing member 12 that can form an integral body with the electric heating wire 11, enables the insulating fixing member 12 to not only serve as the main heating structure together with the electric heating wire 11 but also take into account the insulation between the insulating fixing member 12 and the casing tube 1; by providing the wire insulating member 40 to insulate and separate the first wire 20 and the second wire 30 outside the open end 101 of the casing tube 1, the electric heating wire 11 is led out to the outside of the insulating fixing member 12 to be connected with the first wire 20 and the second wire 30 for conduction, and the insulation performance between the first wire 20 and the second wire 30 is ensured to avoid the positive and negative wires from being overlapped.

[0030] Compared with the existing armored structure type electric heating element, the electric heating element in the embodiment of the present application is equivalent to setting the heating main body structure (i.e., the electric heating wire 11 and the insulating fixing member 12) and the heating cladding (i.e., the cladding tube 1) into a split structure, and fixing the cladding tube 1 to the cladding tube fixing member of the core simulation device. By inserting the insulating fixing member 12 into the opening end 101 of the cladding tube 1, the assembly between the electric heating element and the core simulation device can be realized; and when the heating main body structure fails and needs to be replaced, the insulating fixing member 12 can be directly pulled out from the cladding tube 1, which is convenient for the disassembly operation of the electric heating element and the core simulation device. Since the cladding tube 1 can be reused and there is no need to perform destructive disassembly on the core simulation device, unnecessary waste of resources can be effectively avoided.

[0031] It is easy to understand that in the embodiment of the present application, there is no need to provide an independent tube shell outside the insulating fixing member 12 for the electric heating element.

[0032] In some embodiments, the electric heating wire 11 includes a heating section 111 for providing heat power and two lead wires 112 for electrically connecting to the first wire 20 and the second wire 30 respectively.

[0033] As Figure 3 shown, Figure 3 is Figure 2 an enlarged view of area A of. In some embodiments, the insulating fixing member 12 includes: an insulating rod 121 and an insulating connector 122. The insulating rod 121 is used to fix the heating section 111 of the electric heating wire 11 therein to support the heating section 111 of the electric heating wire 11, and at the same time ensure high insulation performance between the electric heating wire 11 and the cladding tube 1. The insulating connector 122 is used to detachably connect with the insulating rod 121, and the insulating connector 122 can cooperate with the cladding tube 1 to be supported by the opening end 101 of the cladding tube 1, so that the insulating fixing member 12 is suspended in the cladding tube 1, and the two lead wires 112 can extend through the insulating connector 122 to be electrically connected to the first wire 20 and the second wire 30 respectively. In such an embodiment, there is no need to use methods such as welding or setting fixed interfaces such as flanges to assemble the insulating fixing member 12 with the cladding tube 1. Thus, by extracting the insulating connector 122, the insulating fixing member 12 can be pulled out of the cladding tube 1, effectively simplifying the disassembly operation of the insulated electric heating element and the cladding tube 1.

[0034] As Figure 3As shown, in some embodiments, the insulating connector 122 forms an insulating through-hole 1221, and the insulating through-hole 1221 forms a thread. The insulating rod 121 forms a thread adapted to the insulating through-hole 1221 to be threadedly connected to the insulating connector 122, so that the insulating connector 122 is detachably connected to the insulating rod 121; two leads 112 of the electric heating wire 11 are led out from the insulating through-hole 1221 to lead the electric heating wire 11 out of the outer shell tube 1 and connect it to the first wire 20 and the second wire 30 for conducting electricity. Since the insulating rod 121 is threadedly connected to the insulating connector 122 in the insulating through-hole 1221, the two leads 112 led out from the end of the insulating rod 121 will not contact the outer shell tube 1, realizing reliable insulation between the two.

[0035] In some embodiments, the insulating connector 122 is arranged such that its outer diameter is larger than the outer diameter of the outer shell tube 1, so that the insulating connector 122 and the insulating rod 121 form a "T" - shaped structure, facilitating the insulating connector 122 to support on the open end 101 of the outer shell tube 1 and suspending the insulating rod 121 inside the outer shell tube 1.

[0036] In some embodiments, the insulating rod 121 is arranged such that its outer diameter is smaller than a predetermined value of the inner diameter of the outer shell tube 1, so that a predetermined gap is left between the insulating rod 121 and the outer shell tube 1, enabling the insulating rod 121 to be inserted into the outer shell tube 1 and directly lifted out from the outer shell tube 1 upward.

[0037] In some embodiments, the insulating rod 121 is sintered from a ceramic material. Before sintering the ceramic material, the heating section 111 of the electric heating wire 11 is buried in the ceramic material and integrally sintered with the ceramic material, so that the ceramic material forms a rod - shaped structure for supporting the heating section 111 of the electric heating wire 11, while ensuring high insulation performance between the heating section 111 of the electric heating wire 11 and the outer shell tube 1.

[0038] In some embodiments, the heating section 111 of the electric heating wire 11 is buried in the ceramic material in a "U" - shaped form and integrally sintered with the ceramic material, and the two leads 112 of the electric heating wire 11 are left outside the ceramic material on the same side.

[0039] See Figure 4 and Figure 5 , Figure 4 is a cross - sectional view of the wire insulating member 40 according to an embodiment of the present application; Figure 5It is a top view schematic diagram of the wire insulator 40 according to an embodiment of the present application. In some embodiments of the present application, the wire insulator 40 includes: a first insulator 41 and a second insulator 42. The second insulator 42 is connected to a partial surface of the first insulator 41 in the length direction of the first insulator 41. The first insulator 41 is arranged facing the insulation fixing member 12, and the second insulator 42 extends in a direction away from the insulation fixing member 12 from a side of the first insulator 41 away from the insulation fixing member 12; the first insulator 41 forms a first through hole 411 and a second through hole 412 that penetrate along its length direction, and the second through hole 412 penetrates the second insulator 42 along the length direction of the second insulator 42; the first wire 20 and the second wire 30 respectively pass through the first through hole 411 and the second through hole 412.

[0040] In the related art, to meet certain research requirements, it may be necessary to arrange a large number of electric heating elements in a dense and compact manner. At this time, the positive and negative wires need to be led out in different directions to be respectively connected to the positive and negative poles of the power supply. Since the wire leading-out structure of the existing armored structure type electric heating element generally adopts the form of filling insulating materials between the armored shell and the wire, although the insulation between the positive and negative wires is ensured, the leading-out direction of the wire is restricted, and it is difficult to be applicable to the above situation.

[0041] In the present application, by setting the wire insulator 40 as the first insulator 41 and the second insulator 42 connected along the length direction, and on this basis, setting the first through hole 411 and the second through hole 412 with different lengths, so that the first wire 20 and the second wire 30 can respectively lead out from different positions of the wire insulator 40. Thus, while effectively ensuring the insulation performance between the first wire 20 and the second wire 30 and avoiding the situation of the positive and negative wires being overlapped, it is beneficial to meet the technical requirements that the first wire 20 and the second wire 30 can be led out in different directions respectively.

[0042] Such as Figure 1 、 Figure 2 and Figure 4 As shown, the bending direction of the first wire 20 in the figure is only for illustration and does not represent the bending direction that must be adopted in actual application. In some embodiments, after the first wire 20 extends out of the first through hole 411, it is bent to change its extending direction, and the position where the first wire 20 is bent does not reach the position of the end of the second insulator 42 away from the insulation fixing member 12, so as to completely isolate the first wire 20 from the second wire 30 by using the second insulator 42 while changing the extending direction of the first wire 20, and avoid the second wire 30 contacting the first wire 20 to cause a short circuit.

[0043] In some embodiments, after the first wire 20 extends out of the first through hole 411, it is bent by 90° to change its extending direction and avoid short circuit caused by contact with the second wire 30 during the extending process.

[0044] In some embodiments, two leads 112 of the electric heating wire 11 are respectively wound around the radial outsides of the first wire 20 and the second wire 30 to be electrically connected to the first wire 20 and the second wire 30 respectively; the wire insulating member 40 is arranged to be able to insulate the connection between the first wire 20 and the lead 112 and the connection between the second wire 30 and the lead 112 from each other to avoid short circuit caused by the overlap between the two leads 112.

[0045] In some embodiments, the inner diameter of the first through hole 411 on the side facing the insulating fixing member 12 is larger than the inner diameter of the side away from the insulating fixing member 12, so as to facilitate the lead 112 wound around the radial outside of the first wire 20 to enter the first through hole 411. The inner diameter of the second through hole 412 on the side facing the insulating fixing member 12 is larger than the inner diameter of the side away from the insulating fixing member 12, so as to facilitate the lead 112 wound around the radial outside of the second wire 30 to enter the second through hole 412. The first insulating member 41 contacts the insulating fixing member 12 to be supported by the insulating fixing member 12. By respectively arranging the first through hole 411 and the second through hole 412 to enable the leads wound around the first wire 20 and the second wire 30 to enter, and the first insulating member 41 contacts the insulating fixing member 12 to be supported by the insulating fixing member 12, the insulating effect of the first insulating member 41 on the connection between the first wire 20 and the lead 112 and the connection between the second wire 30 and the lead 112 is ensured, thereby avoiding short circuit.

[0046] In some embodiments, the first insulating member 41 of the wire insulating member 40 is arranged such that its outer diameter is larger than the outer diameter of the insulating connecting member 122, so that the wire insulating member 40 can be supported on the insulating connecting member 122.

[0047] The embodiments of the present application further provide a core simulation device, as Figure 6 and Figure 7 shown, Figure 6 showing a partial top view schematic diagram of the core simulation device of the embodiment of the present application before assembling the electric heating element, Figure 7 showing a partial top view schematic diagram of the core simulation device of the embodiment of the present application after assembling the electric heating element, and the first wire 20 and the second wire 30 are omitted in the figure.

[0048] The core simulation device includes: a cladding tube fixing member 2 and a plurality of cladding tubes 1 fixed to the cladding tube fixing member 2, and a plurality of electric heating elements according to any embodiment of the present application. One end of the cladding tube 1 is an open end 101, and the other end is a closed end 102. Each electric heating element is used to be inserted into the open end 101 of a corresponding cladding tube 1.

[0049] The core simulation device provided by the embodiment of the present application adopts the electric heating element according to any embodiment of the first aspect of the present application. By inserting the insulating fixing member 12 into the open end 101 of the cladding tube 1, the assembly between the electric heating element and the core simulation device can be realized; and when the heating main structure fails and needs to be replaced, the insulating fixing member 12 can be directly pulled out from the cladding tube 1, which is convenient for the disassembly operation of the electric heating element and the core simulation device. Since the cladding tube 1 can be reused and there is no need to perform destructive disassembly on the core simulation device, unnecessary waste of resources can be effectively avoided.

[0050] In some embodiments, the second wire 30 of the electric heating element continues to extend upward after passing through the second through hole 412, and the first wire 20 bends at a height lower than that of the second insulating member 42 of the wire insulating member 40 after passing through the first through hole 411 and extends horizontally to the outside of the cladding tube fixing member 2. It is easy to understand that "located outside the cladding tube fixing member 2" here means protruding outward from the cladding tube fixing member 2 in the horizontal direction; in other words, the projection of the part of the first wire 20 located outside the cladding tube fixing member 2 on the horizontal plane is located outside the projection contour of the cladding tube fixing member 2 on the horizontal plane. In such an embodiment, in the case where a large number of electric heating elements need to be arranged densely and compactly in the core simulation device, since the first wires 20 of each electric heating element all bend horizontally and extend to the outside of the cladding tube fixing member 2 at a height lower than that of the second insulating member 42, and at the same time the second wires 30 of each electric heating element extend vertically upward, it can not only avoid the positive and negative wires between the electric heating elements from overlapping, ensure high insulation performance between the electric heating elements, but also facilitate the connection of each first wire 20 and each second wire 30 to the positive and negative poles of the power supply respectively.

[0051] In some embodiments, the cladding tube fixing member 2 has a circular or regular polygon structure (for example, a regular hexagon structure), see Figure 7 , Figure 7 Only a part of the polygon structure is shown in the figure. The point O in the figure is the center of the regular polygon structure, and A1, A2, and A3 are the top angles of the regular polygon structure respectively. In some embodiments, the cladding tube fixing member 2 can be divided into a plurality of sectors, and each sector is a triangle formed by connecting the center O of the regular polygon structure and two adjacent vertices. For example, Figure 7Two sectors, i.e., the first sector 21 and the second sector 22, are shown. The two sectors respectively correspond to the triangle formed by A2A3O and the triangle formed by A1A2O. In each sector, the first through holes 411 of the electric heating elements all face the same direction, and the direction of the line connecting each first through hole 411 and the second through hole 412 is not perpendicular to the outermost side of the sector. In the case where a large number of electric heating elements are densely and compactly arranged in the core simulation device, the above arrangement is conducive to simplifying the wiring problem of the wires and avoiding short circuits caused by the overlapping of wires with different polarities.

[0052] In some embodiments, the direction of the line connecting each first through hole 411 and the second through hole 412 is perpendicular to a side passing through the center.

[0053] Specifically, for the first sector 21, Figure 7 As shown by the direction a1 in Figure a1, the direction a1 is parallel to a side OA3 of the first sector 21, and the direction of the line connecting the first through hole 411 and the second through hole 412 is perpendicular to the direction shown by a1. In such an embodiment, the first wires 20 in the first sector 21 can all extend along the direction shown by a1 to the outside of the A2A3 side.

[0054] For the second sector 22, Figure 7 As shown by the direction a2 in Figure a2, the direction a2 is parallel to a side OA2 of the second sector 22, and the direction of the line connecting the first through hole 411 and the second through hole 412 is perpendicular to the direction shown by a2. In such an embodiment, the first wires 20 in the second sector 22 can all extend along the direction shown by a2 to the outside of the A1A2 side. So that the first wire 20 can extend to the outside of the cladding tube fixing member 2 without passing through other sectors after a single horizontal bend. In the case where a large number of electric heating elements are densely and compactly arranged in the core simulation device, the above arrangement is conducive to further simplifying the wiring problem of the wires and avoiding short circuits caused by the overlapping of wires with different polarities.

[0055] The embodiment of the present application also provides an assembly method for a core simulation device, and the core simulation device is the core simulation device in any embodiment of the present application. The assembly method of the embodiment of the present application includes the following steps S1 to S3:

[0056] S1. Assemble the electric heating elements in any embodiment of the present application on each cladding tube 1. Among them, each second wire 30 continues to extend vertically upward after passing through the second through hole 412, and each first wire 20 bends at a height lower than the second insulating member 42 of the wire insulating member 40 after passing through the first through hole 411 to extend in the horizontal direction.

[0057] S2. Divide all the cladding tubes 1 into multiple regions circumferentially around the center O of the cladding tube fixture 2. Arrange the first through holes of each electric heating element in each region in the same direction. Adjust the extending direction of the bent first wire 20 of the electric heating elements in each region to be parallel to each other and perpendicular to the direction of the line connecting the first through hole 411 and the second through hole 412. Among them, the direction of the line connecting the first through hole 411 and the second through hole 412 is not perpendicular to the outermost side of this region.

[0058] S3. Electrically connect the second wire 30 of each electric heating element to one polarity of the power supply, and electrically connect each first wire 20 to the other polarity of the power supply outside the cladding tube fixture 2.

[0059] In this embodiment, by assembling the electric heating elements of the present application embodiment on each cladding tube 1, the second wire 30 extends vertically upward and is electrically connected to one polarity of the power supply. The first wire 20 is bent and extends in different directions according to the regional division to the outside of the cladding tube fixture 2 and is electrically connected to the other polarity of the power supply, so as to lead out the first wire 20 from the region where a large number of electric heating elements are densely and compactly arranged in different directions and then connect to the power supply, improving the safety and convenience of connecting to the power supply. At the same time, ensuring high insulation performance between the wires of each electric heating element, avoiding the positive and negative wires of each electric heating element from being lapped, and effectively improving the operation safety and reliability of the core simulation device.

[0060] In some embodiments, the cladding tube fixture 2 is circular or regular polygon. In step S1, all the cladding tubes 1 are divided into multiple sectors circumferentially around the center O of the cladding tube fixture 2.

[0061] Exemplarily, please refer to Figure 7 , Figure 7 which shows two sectors of the cladding tube fixture 2: the first sector 21 and the second sector 22. Arrange the first through holes 411 of each electric heating element in the first sector 21 in the same direction. Adjust the extending direction (or bending direction) of the bent first wire 20 of each electric heating element in the first sector 21 to be parallel to each other and perpendicular to the direction of the line connecting the first through hole 411 and the second through hole 412. The direction of the line connecting the first through hole 411 and the second through hole 412 is not perpendicular to the outermost side A2A3 of this sector.

[0062] It is easy to understand that when the outermost side A2A3 of this sector is an arc, the fact that the direction of the line connecting the first through hole 411 and the second through hole 412 is not perpendicular to the outermost side A2A3 of this sector means that: the direction of the line connecting the first through hole 411 and the second through hole 412 is not parallel to the extending direction of the radius of the arc.

[0063] In some embodiments, step S1 includes the following steps S11 to S14:

[0064] S11. Insert the insulating fixing member 12 formed integrally with the electric heating wire 11 into the sheath tube 1.

[0065] S12. Connect the two leads 112 of the electric heating wire 11 to the first wire 20 and the second wire 30.

[0066] S13. Slip the wire insulating member 40 over the first wire 20 and the second wire 30, and move the wire insulating member 40 to a position in contact with the insulating fixing member 12 to be supported by the insulating fixing member 12.

[0067] S14. Bend the first wire 20 at a height lower than that of the second insulating member 42 of the wire insulating member 40 to change the extending direction of the first wire 20.

[0068] In this embodiment, the insulating fixing member 12 is inserted into the sheath tube 1 to support the insulating fixing member 12 by the sheath tube 1; the two leads 112 of the electric heating wire 11 are connected to the first wire 20 and the second wire 30, the wire insulating member 40 is sleeved on the first wire 20 and the second wire 30, and the wire insulating member 40 is moved to a position in contact with the insulating fixing member 12 to insulate between the first wire 20 and the second wire 30. Meanwhile, it is convenient to pull out the electric heating wire 11 and the insulating fixing member 12 from the sheath tube 1 by using the wire insulating member 40 in case of failure of the electric heating wire 11 and the insulating fixing member 12, which is beneficial for disassembly and replacement; the first wire 20 is bent at a height lower than that of the second insulating member 42 of the wire insulating member 40 to change the extending direction of the first wire 20, which is convenient for connecting to different polarities of the power supply and ensures insulation between the wires.

[0069] In some embodiments, step S11 further includes the steps: S111. Pass the two leads 112 of the electric heating wire 11 through the insulating through holes 1221 of the insulating connecting member 122. S112. Thread the insulating connecting member 122 onto the insulating bar 121. S113. Insert the insulating bar 121 into the sheath tube 1. Through the above steps, the electric heating element is assembled with the sheath tube 1.

[0070] Regarding the embodiments of the present application, it should also be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0071] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric heating element applicable to a core simulation device, characterized in that The core simulation device includes: a cladding tube fixing member and a cladding tube fixed to the cladding tube fixing member, one end of the cladding tube being an open end and the other end being a closed end; wherein, the electric heating member includes: an electric heating wire; an insulating fixing member configured to be integratable with the electric heating wire, the insulating fixing member having a shape adapted to the cladding tube so as to be inserted into the cladding tube through the open end and insulate the electric heating wire from the cladding tube and be able to be pulled outwards from the open end of the cladding tube; a first wire and a second wire for electrically connecting to the electric heating wire outside the insulating fixing member; a wire insulating member for insulating and separating the first wire and the second wire outside the open end of the cladding tube.

2. The electric heating element according to claim 1, wherein, The electric heating wire includes a heating section for providing thermal power and two leads for respectively electrically connecting to the first wire and the second wire; The insulating fixing member includes: an insulating rod for fixing the heating section of the electric heating wire therein; an insulating connecting member for detachably connecting to the insulating rod, the insulating connecting member being able to cooperate with the cladding tube to be supported by the open end of the cladding tube, so that the insulating rod is suspended inside the cladding tube; the two leads can extend through the insulating connecting member to be respectively electrically connected to the first wire and the second wire.

3. The electric heating element according to claim 2, wherein, The insulating connecting member forms an insulating through hole, and the insulating through hole forms a thread; The insulating rod forms a thread adapted to the insulating through hole to be threadedly connected to the insulating connecting member; The two leads of the electric heating wire extend outwards from the insulating through hole.

4. The electric heating element according to claim 2, wherein The insulating rod is sintered from a ceramic material, and before sintering the ceramic material, the heating section of the electric heating wire is buried in the ceramic material.

5. The electric heating element according to any one of claims 1-4, characterized in that, The wire insulating member includes: a first insulating member and a second insulating member connected to a partial surface of the first insulating member in the length direction of the first insulating member, the first insulating member being arranged facing the insulating fixing member, and the second insulating member extending in a direction away from the insulating fixing member from a side of the first insulating member away from the insulating fixing member; The first insulating member forms a first through hole and a second through hole penetrating along its length direction, and the second through hole penetrates the second insulating member along the length direction of the second insulating member; The first wire and the second wire respectively pass through the first through hole and the second through hole.

6. The electric heating element according to claim 5, wherein, After the first wire extends out of the first through hole, it is bent to change its extending direction, and the position where the first wire is bent does not reach the position of the end of the second insulating member away from the insulating fixing member.

7. The electric heating element according to claim 5, wherein The two leads of the electric heating wire are respectively wound around the radial outsides of the first wire and the second wire to be respectively electrically connected to the first wire and the second wire; The wire insulating member is configured to insulate the connection between the first wire and the lead and the connection between the second wire and the lead from each other.

8. The electric heating element according to claim 7, characterized in that, The inner diameter of the first through hole on the side facing the insulating fixing member is larger than that on the side away from the insulating fixing member, so as to facilitate the lead wire wound around the radial outer side of the first wire to enter the first through hole; The inner diameter of the second through hole on the side facing the insulating fixing member is larger than that on the side away from the insulating fixing member, so as to facilitate the lead wire wound around the radial outer side of the second wire to enter the second through hole; The first insulating member is in contact with the insulating fixing member to be supported by the insulating fixing member.

9. A core simulation device, characterized in that, Comprising: A cladding tube fixing member and a plurality of cladding tubes fixed to the cladding tube fixing member, one end of each cladding tube being an open end and the other end being a closed end; A plurality of the electric heating elements according to any one of claims 1-8, each of the electric heating elements being adapted to be inserted into the open end of a corresponding one of the cladding tubes.

10. The core simulation device according to claim 9, characterized in that, The second wire of the electric heating element extends upward continuously after passing through the second through hole, and the first wire bends at a height of the second insulating member lower than the wire insulating member after passing through the first through hole and extends in the horizontal direction to the outside of the cladding tube fixing member.

11. A method for assembling a core simulation device, characterized in that The core simulation device is the core simulation device according to claim 9 or 10, and the assembling method comprises: S1. Assemble the electric heating element according to any one of claims 1-8 on each of the cladding tubes, wherein each of the second wires extends upward continuously in the vertical direction after passing through the second through hole, and each of the first wires bends at a height of the second insulating member lower than the wire insulating member after passing through the first through hole and extends in the horizontal direction; S2. Divide all the cladding tubes into a plurality of regions around the center of the cladding tube fixing member along the circumferential direction of the cladding tube fixing member, arrange the first through holes of the electric heating elements in each region in the same direction, and adjust the extending directions of the bent first wires of the electric heating elements in each region to be parallel to each other and perpendicular to the direction of the line connecting the first through hole and the second through hole; wherein, the direction of the line connecting the first through hole and the second through hole is not perpendicular to the outermost side edge of this region; S3. Electrically connect the second wire of each electric heating element to one polarity of the power supply, and electrically connect each first wire to the other polarity of the power supply outside the cladding tube fixing member.

12. The assembly method according to claim 11, wherein Step S1 includes: S11. Insert the insulating fixing member formed integrally with the electric heating wire into the cladding tube; S12. Connect the two lead wires of the electric heating wire to the first wire and the second wire; S13. Put the wire insulating member on the first wire and the second wire, and move the wire insulating member to a position in contact with the insulating fixing member to be supported by the insulating fixing member; S14. Bend the first wire at a height of the second insulating member lower than the wire insulating member to change the extending direction of the first wire.

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