An electric heating structure that is easy to disassemble and replace and can be discretely arranged

Abstract

The present invention discloses an easily disassembled and easily discretely arranged electric heating structure, comprising: a heater housing, the heater housing having an open chamber, the interior of the chamber being provided with a heating core, a compressible heating elastic member, and a hard insulating block connected in sequence from the inside to the outside; the outer diameter of the heating core being adapted to the inner diameter of the chamber; the chamber being further filled with an insulating heat-conducting layer; a tail end tightening cap, the tail end tightening cap being screwed to the chamber opening; a tightening protrusion being provided at the middle portion of the inner side of the tail end tightening cap, the tightening protrusion extending into the chamber and pressing against the hard insulating block, the hard insulating block being movable along the axis of the chamber; an embeddable section at one end of the heater housing, the heating core being located inside the embeddable section, and the outer side of the embeddable section being provided with threads. This electric heating structure can provide a heat source that is easily discretely arranged for heating needs with variable power distribution, is self-locking at high temperatures, has a significantly larger heat exchange area than conventional structures, reduces the risk of burning, and is easy to disassemble and replace.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heaters, and in particular to an electric heating structure which is easy to dismantle and replace and can be arranged discretely. Background Art

[0002] The heat power distribution that needs to be simulated is constantly changing. Conventional pre-set resistive integral heaters cannot readily adapt the heat power distribution, necessitating the use of a discrete heating structure. However, conventional discrete electric heating structures cannot simultaneously meet the requirements of easy replacement and tight contact. To date, only electric heating structures with varying structural dimensions have been developed, but no patents have been found that achieve both these requirements. Summary of the Invention

[0003] The present invention aims to address the shortcomings of the prior art and to provide an electric heating structure that is easy to disassemble and replace and can be discretely arranged. The electric heating structure can provide a heat source that can be easily discretely arranged to meet the heating needs of variable power distribution. It is self-locking at high temperatures, the heat exchange area is significantly larger than that of ordinary structures, the risk of burning is reduced, and it is easy to disassemble and replace.

[0004] The present invention is achieved through the following technical solutions:

[0005] An electric heating structure that is easily disassembled and arranged discretely, comprising:

[0006] A heater housing having an open chamber, wherein the chamber is provided with a heating core, a compressible heating elastic member, and a hard insulating block connected in sequence from the inside to the outside, the heating core being a tightly wound and compressed heating wire coil, and the compressible heating elastic member being a heating wire elastic structure; the outer diameter of the heating core being compatible with the inner diameter of the chamber; and the chamber being further filled with an insulating heat-conducting layer;

[0007] The tail end clamping cap is screwed to the opening of the chamber, and the heater shell has an external thread that matches the tail end clamping cap; the middle part of the inner side of the tail end clamping cap is provided with a clamping protrusion, which extends into the chamber and presses against the hard insulating block, and the hard insulating block can move along the axis of the chamber; one end of the heater shell is an embeddable section, the heating core is located on the inner side of the embeddable section, and the outer side of the embeddable section is provided with a thread.

[0008] Compared to existing technologies, conventional preset resistive integral heaters cannot adjust the heating power distribution as needed, requiring the use of a discrete heating structure. Conventional discrete electric heating structures cannot simultaneously meet the requirements of easy replacement and close contact. This solution provides an easily replaceable, discretely arranged electric heating structure. This electric heating structure can provide a heat source that can be easily arranged for heating with variable power distribution. It self-locks at high temperatures, significantly increases the heat exchange area compared to conventional structures, reduces the risk of burnout, and is easy to replace. In the specific scheme, the middle part of the heater shell is provided with a chamber, and the upper end of the chamber is an open circular hole. The heating core extends into the bottom of the chamber, and the upper end is connected to the compressible heating elastic part. The end of the compressible heating elastic part is embedded in the hard insulating block, wherein the heating core and the compressible heating elastic part are heating wires of the same material and the same specification; the insulating heat-conducting layer is used for heat conduction; a tail end extrusion cap is provided at the opening of the chamber, and the outer surface of the tail end of the heater shell is processed with an ordinary thread for connecting with the tail end extrusion cap, and the inner surface of one end of the tail end extrusion cap is processed with an internal thread for connecting with the heater shell. The outer diameter of the part connected to the tail end tightening cap is generally 1.1×D~1.3×D, and is rounded upward to the diameter of the inscribed circle of the hexagonal head nut of the national standard, which is generally smaller than the diameter of the inscribed circle of the hexagonal head nut for easy installation; by rotating the tail end tightening cap with a thread, the tightening protrusion can squeeze and push the hard insulating block into the chamber, so that the compressible heating elastic part is compressed. In the specific compression process, due to the filling of the insulating heat-conductive layer, the compressible heating elastic part will have a compressed section of the compressible heating elastic part and an uncompressed section of the compressible heating elastic part during the squeezing process. The compressed section of the compressible heating elastic part is now a curved elastic structure of the heating wire that is compressed and deformed during the squeezing process, and the uncompressed section of the compressible heating elastic part is the heating wire that has not yet been compressed; the heater shell can use a metal heat-conductive material with a large thermal expansion coefficient such as stainless steel.

[0009] The above setting is intended to achieve the following: during the heating process, due to thermal expansion and contraction, high temperature expansion causes the internal materials of the chamber and the heater shell to swell, thereby causing the heating section to expand after installation. At this time, the thread on the outside of the embedded section can expand, thereby achieving automatic locking and increasing the heat exchange area. The heat exchange area is significantly larger than that of ordinary structures, the heat exchange effect is better, the temperature difference between the heating section and the heated body is lower, and the risk of burning during high-power conditions or long-term operation is lower. It can also be used to remove and replace accessories such as heating wires, insulating thermal conductive materials, etc. when the electric heating structure is extremely damaged and cannot be separated and replaced from the heated body, repair the damaged electric heating structure, and restore the function of the electric heating structure. It has high maintainability and can also easily replace the heating wire. It uses conventional heating wires and is suitable for industrial electricity 220V and 380V power supplies. It is economical and versatile. Furthermore, based on the required heating power distribution or temperature field distribution or heat source distribution, and taking into account the requirements of uniformity and economy, combined with CFD analysis methods, the number and arrangement of discretely arranged heating body structures can be analyzed and determined, thereby further analyzing and determining the length L and outer diameter D of the embeddable section of the heater shell; the present invention can be discretely installed on a metal body, so that the heating power distribution of the metal body can be changed at any time as needed; it can also be installed on a non-metallic body to create a variably distributed temperature field for the non-metallic body; it can also be immersed in a fluid medium to provide a variably distributed heat source for the fluid medium.

[0010] Further optimized, a first through hole is opened on the tail end tightening cap, and the first through hole is used to introduce the cable into the chamber, and the introduced end of the cable passes through the hard insulating block and is connected to the compressible heating elastic part; it is used to introduce the cable.

[0011] Further optimization is that the outer diameter D of the embeddable section is not less than 5 mm, and the inner diameter of the chamber d = D-δ, where δ is 1 to 5 mm; the length of the embeddable section of the heater shell should be longer than the length of the actual heating section, generally 3 to 5 mm longer.

[0012] For further optimization, the heater housing is also fixedly provided with a hexagonal nut to facilitate fixing the heater housing.

[0013] Further optimization is that the middle of the chamber is provided with a thermometer reserved tube, the thermometer reserved tube is arranged along the axis of the chamber, and the middle of the hard insulating block and the tail end tightening cap are provided with a central hole for the thermometer reserved tube to pass through; it is used to measure temperature.

[0014] Further optimization is that the end of the tail end squeezing cap away from the chamber is provided with a tail end sealing cap, and the side of the tail end squeezing cap is provided with an external thread compatible with the tail end sealing cap; the middle of the tail end sealing cap is provided with a tail end sealing joint, one end of the tail end sealing joint extends into the tail end sealing cap and seals the center hole of the tail end squeezing cap; it is used to seal the center hole to prevent leakage of the insulating heat conductive layer material.

[0015] Further optimization is carried out, in which one end of the tail end sealing joint is provided with an ellipsoidal crown structure, and one end of the tail end tightening cap is provided with a concave frustum structure that is adapted to the size of the ellipsoidal crown structure, and the ellipsoidal crown structure and the concave frustum structure are linearly sealed to improve the sealing effect.

[0016] Further optimization is that the tail end sealing cap is provided with a second through hole for introducing the cable; and is used for leading out the cable.

[0017] Further optimization is provided in the middle of the tail end sealing joint with a reserved hole which is coaxial and has the same diameter as the central hole; and is used for installing a reserved tube for a thermometer.

[0018] Further optimization is that the insulating heat-conducting layer is powdered material, which is convenient for squeezing and compacting.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The heating section of this invention features a threaded exterior, requiring minimal torque for installation. It also offers excellent locking performance after installation, making it less susceptible to misoperation and the heating section being dislodged. It can also be easily disassembled if damaged, making repairs easy.

[0021] 2. The heating section of the present invention will automatically lock at high temperatures, the heat exchange area is significantly larger than that of ordinary structures, the heat exchange effect is better, the temperature difference between the heating section and the heated object is lower, and the risk of burning during high-power conditions or long-term operation is lower.

[0022] 3. The present invention adopts armored design, the surface is not electrified under normal working conditions, and the safety is good.

[0023] 4. The present invention features a hexagonal nut structure for easy installation and removal. The hexagonal nut also serves as a positioning device, demarcating the heating and non-heating sections. A 3-5mm installation and machining margin is reserved, ensuring that all heating sections maintain close contact with the heated object, minimizing the risk of burnout and enhancing safety. The hexagonal nut also secures the electric heating structure during tail-end packing extrusion.

[0024] 4. The present invention sets a locking filler extrusion structure at the tail end, and the filler is full without gaps, avoiding the hidden danger of damage caused by secondary processing of the conventional electric heating structure to fill the filler. The filler of the electric heating structure has high uniformity and high performance and quality stability.

[0025] 5. The locking filler extrusion structure provided at the tail end of the present invention can be used to remove and replace accessories such as heating wires, insulating thermal conductive materials, etc. when the electric heating structure is extremely damaged and cannot be separated from the heated body, thereby repairing the damaged electric heating structure and restoring the function of the electric heating structure, and has high maintainability.

[0026] 6. The locking filler extrusion structure provided at the tail end of the present invention can be used to provide a single-end lead-out of the cable, and is particularly suitable for blind hole structure installation in conjunction with the heating top structure.

[0027] 7. The locking packing extrusion structure at the rear end of the present invention allows for the installation of a thermometer during initial installation or as needed during use. The thermometer, located at the highest temperature point within the electric heating structure, is used for temperature safety monitoring of the electric heating structure or, in conjunction with a temperature-power feedback device, to maintain a constant temperature field. The thermometer is integrated with the electric heating structure, eliminating the need for additional sealing to the heated object.

[0028] 8. The locking filler extrusion structure provided at the tail end of the present invention can facilitate the replacement of the heating wire. Conventional heating wire can be used and is applicable to industrial electricity 220V and 380V power supplies, with good economy and versatility.

[0029] 9. The present invention can be discretely installed on a metal body so that the heat power distribution of the metal body can be changed at any time as needed; it can also be installed on a non-metallic body to create a variable distribution temperature field for the non-metallic body; it can also be immersed in a fluid medium to provide a variable distribution heat source for the fluid medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0031] Figure 1 A schematic cross-sectional view of an electric heating structure according to an embodiment of the present invention;

[0032] Figure 2 A schematic structural diagram of an internal heating wire according to an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of a half-section structure of an electric heating structure according to an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of an electric heating structure without temperature monitoring structure according to an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of a filler extrusion structure with an indented tail end of an electric heating structure according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the internal heating wire structure of the head heating structure of an electric heating structure provided by an embodiment of the present invention.

[0037] Markings and corresponding parts names in the accompanying drawings:

[0038] 1-heater housing, 2-tail end extrusion cap, 3-tail end sealing cap, 4-tail end sealing joint, 5-insulating thermal conductive layer, 6-hard insulating block, 7-heating core, 8-compressed section of compressible heating elastic part, 9-uncompressed section of compressible heating elastic part, 10-cable 1, 11-cable 2, 12-thermometer reserved tube, 13-tail end sealing plug. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0040] Example 1

[0041] This embodiment 1 provides an electric heating structure that is easy to disassemble and arrange discretely, such as Figures 1 to 6 Shown, including:

[0042] The heater housing 1 has an open chamber. Inside the chamber, there are a heating core 7, a compressible heating elastic member, and a hard insulating block 6 connected in sequence from the inside to the outside. The heating core 7 is a tightly wound and compressed heating wire coil, and the compressible heating elastic member is a heating wire elastic structure. The outer diameter of the heating core 7 is adapted to the inner diameter of the chamber. The chamber is also filled with an insulating heat-conducting layer 5.

[0043] The tail end tightening cap 2 is screwed to the chamber opening, and the heater shell 1 has an external thread that matches the tail end tightening cap 2; the middle part of the inner side of the tail end tightening cap 2 is provided with a tightening protrusion, which extends into the chamber and rests against the hard insulating block 6, and the hard insulating block 6 can move along the axis of the chamber; one end of the heater shell 1 is an embeddable section, the heating core 7 is located on the inner side of the embeddable section, and the outer side of the embeddable section is provided with a thread.

[0044] Compared to existing technologies, conventional preset resistive integral heaters cannot adjust the heating power distribution as needed, requiring the use of a discrete heating structure. Conventional discrete electric heating structures cannot simultaneously meet the requirements of easy replacement and close contact. This solution provides an easily replaceable, discretely arranged electric heating structure. This electric heating structure can provide a heat source that can be easily arranged for heating with variable power distribution. It self-locks at high temperatures, significantly increases the heat exchange area compared to conventional structures, reduces the risk of burnout, and is easy to replace. In the specific scheme, the middle part of the heater shell 1 is provided with a chamber, a circular hole is opened at the upper end of the chamber, the heating core 7 extends into the bottom of the chamber, and the upper end is connected to the compressible heating elastic part, and the end of the compressible heating elastic part is embedded in the hard insulating block 6, wherein the heating core 7 and the compressible heating elastic part are heating wires of the same material and the same specification; the insulating heat-conducting layer 5 is used for heat conduction; a tail end extrusion cap 2 is provided at the opening of the chamber, and the outer surface of the tail end of the heater shell 1 is processed with an ordinary thread for connecting with the tail end extrusion cap 2, and the inner surface of one end of the tail end extrusion cap 2 is processed with an internal thread for connecting with the heater shell 1. The outer diameter of the part connected to the tail end tightening cap 2 is generally 1.1D~1.3D, and is rounded upward to the diameter of the inscribed circle of the hexagonal head nut of the national standard, which is generally smaller than the diameter of the inscribed circle of the hexagonal head nut for easy installation; by threading the tail end tightening cap 2, the tightening protrusion can squeeze and push the hard insulating block 6 into the chamber, so that the compressible heating elastic part is compressed. In the specific compression process, due to the filling of the insulating heat-conducting layer 5, the compressible heating elastic part will have a compressed section 8 of the compressible heating elastic part and an uncompressed section 9 of the compressible heating elastic part during the squeezing process. The compressed section 8 of the compressible heating elastic part is now a curved elastic structure of the heating wire that is compressed and deformed during the squeezing process, and the uncompressed section 9 of the compressible heating elastic part is a heating wire that has not yet been compressed; the heater shell 1 can use a metal heat-conducting material with a large thermal expansion coefficient such as stainless steel.

[0045] In the above structure, the material of the heating wire should be selected according to the operating temperature range and application scenario. Stainless steel or carbon steel is generally selected for the normal temperature section, nickel-based alloys and other materials are generally selected for the medium and high temperature sections, and alloys containing molybdenum and tungsten can be selected for the high temperature section. The diameters of the heating wires of each section can be kept consistent. The length of each section of the heating wire needs to be matched according to the length and diameter of the actual heating section, combined with the required power and the resistivity of the heating wire. The goal of matching is to make the electric power just reach the required power at full voltage. The length of the heating wire of the heating core 7 generally accounts for 99.9% to 95% of the total length.

[0046] In the above structure, the rigid insulating block 6 is made of an insulating and thermally conductive material, which can be the same material as the insulating and thermally conductive layer 5. The insulating and thermally conductive material is pre-processed into a cylindrical shape with a central perforation, into which one end of the uncompressed section 9 of the compressible heat-generating elastic member is directly inserted and secured. The outer diameter of the rigid insulating block 6 is 0.3-0.5 mm smaller than the inner diameter d of the heater housing 1.

[0047] The heating section at one end of the heater housing 1 is an insertable section with a threaded exterior, i.e., a coarse-threaded, conventional thread structure. It can be screwed onto the heated object. The low torque during installation facilitates installation, and the excellent locking performance after installation makes it less susceptible to misoperation that could cause the heating section to move out of position. It is also easily disassembled and repairable if damaged.

[0048] In the above structure, the outer diameter of the squeeze protrusion is 0.3-0.5 mm smaller than the inner diameter d of the heater housing 1. The squeeze protrusion is centrally perforated, and the hole diameter is slightly larger than the outer diameter of the thermometer reserved tube 12, by 0.3-0.5 mm.

[0049] The above setting is intended to achieve: during the heating process, due to thermal expansion and contraction, high temperature expansion causes the internal material of the chamber and the heater shell 1 to swell, thereby causing the heating section to expand after installation. At this time, the thread on the outside of the embedded section can expand, thereby achieving automatic locking and increasing the heat exchange area. The heat exchange area is significantly larger than that of the ordinary structure, the heat exchange effect is better, the temperature difference between the heating section and the heated body is lower, and the risk of burning during high-power conditions or long-term operation is lower. It can also be used to remove and replace accessories such as heating wires, insulating thermal conductive materials, etc. when the electric heating structure is extremely damaged and cannot be separated and replaced from the heated body, repair the damaged electric heating structure, and restore the function of the electric heating structure. It has high maintainability and can also easily replace the heating wire. It uses conventional heating wires and is suitable for industrial electricity 220V and 380V power supplies. It is economical and versatile. Furthermore, based on the required heating power distribution or temperature field distribution or heat source distribution, and taking into account the requirements of uniformity and economy, combined with CFD analysis methods, the number and arrangement of discretely arranged heating body structures can be analyzed and determined, thereby further analyzing and determining the length L and outer diameter D of the embeddable section of the heater shell 1; the present invention can be discretely installed on a metal body, so that the heating power distribution of the metal body can be changed at any time as needed; it can also be installed on a non-metallic body to create a variable distribution temperature field for the non-metallic body; it can also be immersed in a fluid medium to provide a variable distribution heat source for the fluid medium.

[0050] See also Figure 2 As a specific implementation method for introducing a cable, it is configured as follows: a first through hole is opened on the tail end tightening cap 2, the first through hole is used to introduce the cable into the chamber, and the introduced end of the cable passes through the hard insulating block 6 and is connected to the compressible heating elastic member.

[0051] It will be understood that in the above structure, the cables include cable 10 and cable 2 11. One end of cable 10 and cable 2 11 is connected to the heating wire of the uncompressed section 9 of the compressible heating elastic element, and the other end is connected to the power supply. Cable 10 and cable 2 11 are used to connect to the live and neutral wires of the power supply, respectively. The diameter of the conductive portion of cable 10 and cable 2 11 should be at least twice the diameter of the heating wire and rounded to the standard wire gauge to reduce costs.

[0052] In this embodiment, the outer diameter D of the embeddable section is not less than 5 mm, and the inner diameter of the chamber d = D-δ, where δ is 1 to 5 mm; the length of the embeddable section of the heater shell 1 should be longer than the length of the actual heating section, generally 3 to 5 mm longer.

[0053] See also Figure 1 and Figure 2 As a specific embodiment for facilitating fixing the heater housing 1, it is configured as follows: a hexagonal nut is fixedly sleeved on the heater housing 1;

[0054] It is understandable that a hexagonal nut is also provided on the heater housing 1. During installation, the heater housing 1 with external threads can be fixed by clamping the hexagonal nut. The nominal outer diameter of the hexagonal nut structure of the heater housing 1 is generally 1.2D to 1.5D, and is rounded upward to the diameter of the inscribed circle of the hexagonal head nut in the national standard; the hexagonal nut structure facilitates installation and disassembly. The hexagonal nut structure is also used for positioning, dividing the heating section from the non-heating section, and reserving 3 to 5 mm of installation and processing margin to ensure that all heating sections are in close contact with the heated object, with low risk of burnout and high safety.

[0055] See also Figure 2 As a specific embodiment of measuring temperature, it is set as follows: a thermometer reserved tube 12 is provided in the middle of the chamber, the thermometer reserved tube 12 is arranged along the axis of the chamber, and the middle of the hard insulating block 6 and the tail end squeeze cap 2 are both provided with a central hole for the thermometer reserved tube 12 to penetrate;

[0056] It is understood that a thermometer reserved tube 12 is installed in the middle of the chamber, and the thermometer is installed in the thermometer reserved tube 12. The inner diameter of the thermometer reserved tube 12 is generally 1.1 to 3.1 mm, suitable for thermometers with a diameter of 1.0 to 3.0 mm, preferably 1.6 mm, suitable for thermometers with a diameter of 1.5 mm. The wall thickness of the thermometer reserved tube 12 is D 温度 , D 温度The typical range is 0.5 to 1.5 mm. The rigid insulating block 6 has a central hole with a diameter slightly larger than the outer diameter of the thermometer tube 12, by 0.3 to 0.5 mm. The diameter of the central hole in the rigid insulating block 6 is 0.5 mm larger than the outer diameter of the thermometer tube 12. A thermometer can be installed as needed during initial installation or use, located at the highest temperature point of the electric heating structure, for temperature safety monitoring of the electric heating structure or, in conjunction with a temperature-power feedback device, for creating a constant temperature field. The thermometer is integrated into the electric heating structure, eliminating the need for additional sealing with the heated object.

[0057] See also Figure 2 As a specific embodiment for sealing the center hole and preventing leakage of the insulating heat-conducting layer 5 material, the configuration is as follows: the end of the tail end squeeze cap 2 away from the chamber is provided with a tail end sealing cap 3, the side of the tail end squeeze cap 2 is provided with an external thread adapted to the tail end sealing cap 3; the middle of the tail end sealing cap 3 is provided with a tail end sealing joint 4, one end of the tail end sealing joint 4 extends into the tail end sealing cap 3 and seals the center hole of the tail end squeeze cap 2;

[0058] It can be understood that the tail end sealing cap 3 is threadedly connected to the end of the tail end extrusion cap 2 away from the chamber, that is, the outer surface of the other end of the tail end extrusion cap 2 is processed with an external thread for connection with the tail end sealing cap 3; the inner surface of one end of the tail end sealing cap 3 is processed with an internal thread for connection with the tail end extrusion cap 2, and by tightening the tail end extrusion cap 2, the tail end sealing joint 4 seals the center hole of the tail end extrusion cap 2, thereby preventing leakage of the insulating heat conductive layer 5 material.

[0059] See also Figure 5 As a specific embodiment for improving the sealing effect, it is set as follows: one end of the tail end sealing joint 4 has an ellipsoidal crown structure, and one end of the tail end tightening cap 2 has an inwardly concave cone structure that matches the size of the ellipsoidal crown structure, and the ellipsoidal crown structure and the inwardly concave cone structure are connected in a linear sealing manner;

[0060] It is understandable that the end of the tail end squeeze cap 2 connected to the tail end sealing cap 3 is processed into a concave truncated cone structure for cooperating with the tail end sealing joint 4 or the tail end sealing plug 13 to form a line sealing structure; a cross-sectional diameter of the truncated cone is generally D 温度 The diameter of the other cross section is typically 0.2 to 0.5 mm, and the diameter of the other cross section can generally be 0.5D to 0.8D. The inclination of the frustum ranges from approximately 30° to 60°, preferably 45°. The tail end sealing joint 4 has an ellipsoidal crown-shaped surface at one end and a T-shaped structure at the other end. The ellipsoidal crown cooperates with the tail end clamping cap 2 to form a linear seal, and the T-shaped structure facilitates the extrusion of the tail end sealing cap 3. The outer diameters of the tail end clamping cap 2 and the tail end sealing cap 3 are determined by their respective wall thicknesses, which are generally 2 to 4 mm. The tail end clamping cap 2 is equipped with a hexagonal nut structure for easy operation.

[0061] See also Figure 2 and Figure 3 , as a specific embodiment for leading out the cable, it is configured as follows: a second through hole for leading in the cable is opened on the tail end sealing cap 3;

[0062] It can be understood that a first through hole is provided at the other end of the tail end sealing cap 3, and the diameter of the first through hole is smaller than the large cross-sectional diameter of the depressed cone of the tail end squeezing cap 2, which can generally be 0.3D to 0.6D; a second through hole is provided on the tail end sealing cap 3 for leading out cable 10 and cable 2 11; by setting a single-end lead-out of the cable, combined with the heating top structure, it is particularly suitable for blind hole structure installation.

[0063] See also Figure 5 As a specific embodiment of installing the thermometer reserved tube 12, it is set as follows: the middle of the tail end sealing joint 4 has a reserved hole that is coaxial and has the same diameter as the center hole;

[0064] It is understandable that a reserved hole for the thermometer reserved tube 12 is provided in the center of the tail end sealing joint 4, and the inner diameter of the reserved hole is consistent with the inner diameter of the thermometer reserved tube 12. The diameter of the T-shaped tail of the tail end sealing joint 4 is slightly smaller than the diameter of the reserved hole of the tail end sealing cap 3, which is 0.5 to 1 mm smaller; or a tail end sealing plug 13 can be directly provided, and the shape and structure of the tail end sealing plug 13 are consistent with the tail end sealing joint 4, and only the reserved hole for the thermometer reserved tube 12 is cancelled, such as Figure 4 shown.

[0065] See also Figure 1 As a specific implementation method that facilitates extrusion and compaction, it is set as follows: the insulating heat-conducting layer 5 is a powder; it can be understood that the insulating heat-conducting layer 5 is made of insulating heat-conducting materials, generally powder, which is convenient for extrusion and compaction; the material is selected according to the temperature range and application scenario, and the normal temperature section generally selects magnesium oxide, aluminum oxide and other powders, the medium and high temperature sections generally select high-purity aluminum oxide, and the high temperature section can select materials containing hafnium oxide, zirconium oxide, boron nitride and the like; the insulating heat-conducting layer 5 is filled with powder without gaps, avoiding the damage hidden danger caused by the secondary processing of the conventional electric heating structure for filling the filler, and the filler uniformity of the electric heating structure is high and the performance and quality stability are high.

[0066] The above settings can provide a heat source that is easy to arrange discretely for the heating needs of variable power distribution. The electric heating structure adopts an armored design and has its own threaded structure. The surface is not electrified during operation, it is easy to install, self-locking at high temperatures, the heat exchange area is significantly larger than that of ordinary structures, and the risk of burning is reduced. The electric heating structure has a single-end lead-out wire and a hexagonal nut structure, which is easy to disassemble and replace. The top heating structure is optional, and it is particularly suitable for providing a heat source for blind hole structures. When the electric heating structure cannot be disassembled and replaced as a whole, the heating wire, insulating thermal conductive material and other accessories can be removed and replaced separately to restore the function of the electric heating structure. The electric heating structure can be discretely arranged to provide a heat source with variable power distribution for the heating element. The operating temperature is room temperature to 1000℃ and normal pressure to 20MPa. The working medium is generally a metal body, and it can also be used to heat non-metallic bodies and fluid media.

[0067] Example 2

[0068] This embodiment 2 is further optimized on the basis of embodiment 1, and provides a working principle and installation process thereof, including the following specific steps:

[0069] First, the heater housing 1 with the external thread is fixed by clamping the hexagonal nut portion of the heater housing 1 with the external thread.

[0070] Then, the thermometer reserved tube 12 is passed through the hard insulating block 6, and the hard insulating block 6 in which the uncompressed section 9 of the compressible heating elastic member has been embedded and fixed is aligned with the inner cavity of the heater housing 1 with external threads.

[0071] Third, the heating core 7 and the compression section 8 of the compressible heating elastic part are installed into the inner cavity of the heater shell 1 with external threads. The hard insulating block 6 is not installed into the inner cavity of the heater shell 1 with external threads first, and the remaining gap is used for the installation of the insulating heat-conducting layer 5.

[0072] Fourth, install the insulating heat-conducting layer 5 into the heater housing 1 with external threads, fill it with powder as much as possible, and leave 5 to 10 mm from the inner cavity port of the heater housing 1 with external threads.

[0073] Fifth, press the hard insulating block 6 into the inner cavity of the heater housing 1 with external threads.

[0074] Then, cable 1 10 and cable 2 11 are respectively connected to the heating wire of the uncompressed section 9 of the compressible heating elastic member, and cable 1 10 and cable 2 11 are respectively led out through the first through hole on the tail end tightening cap 2, and then the tightening protrusion of the tail end tightening cap 2 is aligned with the hard insulating block 6, and the internal thread of the tail end tightening cap 2 is connected to the external thread of the tail end of the heater shell 1.

[0075] The tail end tightening cap 2 is rotated to gradually squeeze the insulating heat conductive layer 5 through the hard insulating block 6 until it cannot rotate. During the rotation of the tail end tightening cap 2, the heater housing 1 with external threads can be fixed by clamping the hexagonal nut portion of the heater housing 1 with external threads.

[0076] Then choose whether to install a thermometer;

[0077] If a thermometer needs to be installed, the steps include: passing the thermometer through the tail end sealing joint 4, inserting the temperature measuring end of the thermometer into the bottom of the thermometer reserved tube 12, and aligning the ellipsoidal crown of the tail end sealing joint 4 with the concave cone of the tail end extrusion cap 2. Then, lead out the cable 1 10 and the cable 2 11 through the second through hole on the tail end sealing cap 3 respectively, lead out the tail end sealing joint 4 through the center hole on the tail end sealing cap 3, and connect the internal thread of the tail end sealing cap 3 with the thread of the tail end extrusion cap 2. Rotate the tail end sealing cap 3 and gradually squeeze the tail end sealing joint 4 so that the ellipsoidal crown of the tail end sealing joint 4 and the concave cone surface of the tail end extrusion cap 2 cooperate to form a line sealing structure, which completely seals the insulating heat conductive layer 5 powder that may leak. During the rotation of the tail end sealing cap 3, the tail end extrusion cap 2 can be fixed by clamping the hexagonal nut part of the tail end extrusion cap 2.

[0078] If the thermometer is not installed, the following steps are included: align the ellipsoidal crown of the tail end sealing joint 4 with the concave cone of the tail end extrusion cap 2. Then, lead out the cable 1 10 and the cable 2 11 through the second through hole on the tail end sealing cap 3 respectively, and lead out the tail end sealing joint 4 through the center hole on the tail end sealing cap 3. Connect the internal thread of the tail end sealing cap 3 with the thread of the tail end extrusion cap 2. Rotate the tail end sealing cap 3 and gradually squeeze the tail end sealing joint 4 so that the ellipsoidal crown of the tail end sealing joint 4 and the concave cone surface of the tail end extrusion cap 2 cooperate to form a line sealing structure to completely seal the insulating heat conductive layer 5 powder that may leak. During the rotation of the tail end sealing cap 3, the tail end extrusion cap 2 can be fixed by clamping the hexagonal nut part of the tail end extrusion cap 2.

[0079] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An easily disassembled and discretely arranged electric heating structure, characterized in that: include: A heater housing (1), the heater housing (1) having an open chamber, wherein the chamber is provided with a heating core (7), a compressible heating elastic member, and a hard insulating block (6) connected in sequence from the inside to the outside, the heating core (7) being a tightly wound and compressed heating wire coil, and the compressible heating elastic member being a heating wire elastic structure; the outer diameter of the heating core (7) being compatible with the inner diameter of the chamber; and the chamber is further filled with an insulating heat-conducting layer (5); A tail end tightening cap (2), the tail end tightening cap (2) is screwed to the opening of the chamber, the heater housing (1) is provided with an external thread that matches the tail end tightening cap (2); a tightening protrusion is provided at the middle portion of the inner side of the tail end tightening cap (2), the tightening protrusion extends into the chamber and abuts against the hard insulating block (6), and the hard insulating block (6) can move along the axis of the chamber; One end of the heater housing (1) is an embeddable section, the heating core (7) is located inside the embeddable section, and the outside of the embeddable section is provided with threads; The tail end squeeze cap (2) is provided with a first through hole, and the first through hole is used to introduce a cable into the chamber, and the introduced end of the cable passes through the hard insulating block (6) and is connected to the compressible heating elastic member.

2. The easily detachable and discretely arranged electric heating structure according to claim 1, characterized in that: The outer diameter D of the embeddable section is not less than 5 mm, and the inner diameter of the chamber is d=D-δ, where δ is 1 to 5 mm.

3. The easily detachable and discretely arranged electric heating structure according to claim 1, characterized in that: The heater housing (1) is also fixedly sleeved with a hexagonal nut.

4. The easily detachable and discretely arranged electric heating structure according to claim 1, characterized in that: The middle of the chamber is provided with a thermometer reserved tube (12), which is arranged along the axis of the chamber. The middle of the hard insulating block (6) and the tail end squeeze cap (2) are both provided with a central hole for the thermometer reserved tube (12) to penetrate.

5. The easily detachable and discretely arranged electric heating structure according to claim 4, characterized in that: The end of the tail end squeeze cap (2) away from the chamber is provided with a tail end sealing cap (3), and the side of the tail end squeeze cap (2) is provided with an external thread that is compatible with the tail end sealing cap (3); the middle of the tail end sealing cap (3) is provided with a tail end sealing joint (4), and one end of the tail end sealing joint (4) extends into the tail end sealing cap (3) and seals the center of the tail end squeeze cap (2).

6. The easily detachable and discretely arranged electric heating structure according to claim 5, characterized in that: One end of the tail end sealing joint (4) is provided with an ellipsoidal crown structure, and one end of the tail end tightening cap (2) is provided with an inwardly concave cone structure that matches the size of the ellipsoidal crown structure. The ellipsoidal crown structure and the inwardly concave cone structure are connected in a line sealing manner.

7. The easily detachable and discretely arranged electric heating structure according to claim 6, characterized in that: The tail end sealing cap (3) is provided with a second through hole for introducing a cable.

8. The easily detachable and discretely arranged electric heating structure according to claim 5, characterized in that: The middle portion of the tail end sealing joint (4) is provided with a reserved hole which is coaxial and has the same diameter as the central hole.

9. The easily detachable and discretely arranged electric heating structure according to claim 1, characterized in that: The insulating heat-conducting layer (5) is powder.

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