Novel heating pipe

Abstract

The utility model belongs to the technical field of electric heating, and mainly relates to a novel heating pipe which comprises a flange, a heating pipe body and a protective sleeve. The flange, the heating pipe body and the protective sleeve are all made of the same ceramic material, the flange sleeves the top end of the heating pipe body, and the protective sleeve sleeves the lower end of the heating pipe body; the flange and the protective sleeve are inserted and clamped, a dispensing hole is formed in the flange, and the dispensing hole is communicated with an inner cavity of the protective sleeve at the inserted and matched part of the flange and the protective sleeve. The ceramic material adopted by the protective sleeve has good heat-conducting property, so that the heating efficiency is improved; the flange, the heating pipe body and the protective sleeve are all made of the same ceramic material, so that the thermal expansion coefficients of the flange, the heating pipe body and the protective sleeve are consistent, the problems of internal stress and damage caused by thermal expansion and cold contraction are avoided, the reliability of the heating pipe body under different temperature changes is maintained, and the influence of thermal stress is reduced due to the material characteristic; and the service life of the heating pipe is further prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of electric heating technology, and mainly relates to a new type of heating tube. Background Technology

[0002] One major application of MCH ceramic heating elements is in biomass pellet furnaces. Based on their usage, they can be categorized into MCH ceramic heating elements without protective sheaths and those protected with stainless steel sheaths. The lack of a protective sheath makes the heating element susceptible to external environmental influences such as moisture and dust, potentially leading to aging and performance degradation. Furthermore, the lack of mechanical protection makes it prone to physical damage, affecting the heating element's lifespan and reliability. In practical applications, during biomass pellet combustion, ash and other byproducts easily adhere to the heating element's surface. These deposits gradually accumulate, reducing the heating element's heat transfer efficiency and potentially causing corrosion and physical damage, further shortening the heating element's lifespan.

[0003] While MCH ceramic heating elements protected by stainless steel sheaths offer mechanical protection against physical damage and environmental influences, the relatively poor thermal conductivity of the stainless steel sheath can affect overall heating efficiency. Furthermore, the coefficients of thermal expansion differ between stainless steel and the ceramic material used in the heating element. For example, a novel sheathed heating element disclosed in Chinese invention patent CN216281513U includes a sheath, a base, and a heating element. The sheath and base are sealed together to form a heating shell, and the heating element is installed inside. The inconsistent materials used for the sheath, base, and heating element result in different coefficients of thermal expansion. Long-term use may lead to stress caused by thermal expansion and contraction, affecting the stability and lifespan of the heating element. Utility Model Content

[0004] This invention provides a novel heating tube to solve the problems of low heating efficiency caused by the poor thermal conductivity of the stainless steel sheath and short service life caused by inconsistent materials used in the various components of the heating tube in the prior art.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A novel heating element includes a flange, a heating element body, and a protective sleeve. The flange, heating element body, and protective sleeve are all made of the same ceramic material. The flange is fitted onto the top of the heating element body, and the protective sleeve is fitted onto the bottom of the heating element body. The flange and the protective sleeve are inserted and snapped together. The flange has an adhesive dispensing hole extending along the axial direction of the heating element body. The adhesive dispensing hole communicates with the inner cavity of the protective sleeve at the insertion and mating part of the flange and the protective sleeve.

[0007] Beneficial effects: Compared with stainless steel protective sleeves, the ceramic material used in the protective sleeve has excellent thermal conductivity, enabling the heating tube to quickly reach the required operating temperature, thus ensuring the high-efficiency heating capacity of the heating tube and improving heating efficiency; the flange, heating tube, and protective sleeve are all made of the same ceramic material, ensuring that the coefficients of thermal expansion of the three are consistent, avoiding internal stress and damage caused by thermal expansion and contraction, maintaining the reliability of the heating tube under different temperature changes. This material characteristic reduces the impact of thermal stress and further improves the service life of the heating tube; the flange and protective sleeve are inserted and snapped together, and the flange and protective sleeve can be further fixed by injecting glue into the glue dispensing hole, strengthening the fixing strength between the flange and the protective sleeve.

[0008] Furthermore, the flange has a circular insertion part with a T-shaped groove. The T-shaped groove has a communicating sliding groove and a snap-fit ​​groove. The inner wall of the protective sleeve has a protrusion that can slide with the sliding groove. When the protective sleeve is in the position corresponding to the snap-fit ​​groove, the protrusion can be rotated and snapped into the snap-fit ​​groove to lock the protective sleeve and the flange.

[0009] Beneficial effects: When the protrusion is inserted into the protective sleeve in the circular insertion part, the protrusion slides in the sliding groove section. When the protrusion slides to the position corresponding to the protrusion and the snap-fit ​​groove section, the protective sleeve is rotated, and the protrusion can be snapped into the snap-fit ​​groove section to lock the protective sleeve and the flange. The structure is simple and the operation is convenient.

[0010] Furthermore, the flange includes a flange portion and a circular insertion portion connected together, and the diameter of the flange portion is larger than the diameter of the circular insertion portion. The adhesive dispensing hole forms a through-hole structure on the flange portion and a groove-shaped structure on the circular insertion portion.

[0011] Beneficial effects: When glue is injected into the dispensing hole, the circular plug at the groove-shaped structure position is fixedly connected to the inner wall of the protective sleeve by the glue. The operation is simple and no other fixing structure is required, and the structure is simple.

[0012] Furthermore, the protective sleeve includes a protective sleeve segment and a support sleeve segment connected together, with the protrusion located on the support sleeve segment, and the diameter of the support sleeve segment being larger than the diameter of the protective sleeve segment.

[0013] Furthermore, the protective sleeve is provided with a mounting ring at one end near the support sleeve. The inner diameter of the mounting ring is smaller than the diameter of the support sleeve, and the mounting ring is provided with a plurality of threaded holes arranged at equal intervals in its circumferential direction.

[0014] Beneficial effects: The new heating element is fixed by the threaded holes on the mounting ring, eliminating the need to drill holes directly in the protective sleeve and preventing damage to the ceramic protective sleeve; multiple threaded holes make the new heating element more securely fixed; when installing the new heating element, the flange faces upwards, the protective sleeve faces downwards, the diameter of the support sleeve section is larger than the diameter of the protective sleeve section, and the inner diameter of the mounting ring is smaller than the diameter of the support sleeve section. When the new heating element is installed, the mounting ring presses against the support sleeve section to prevent the protective sleeve from slipping off the inside of the mounting ring.

[0015] Furthermore, the mounting ring is made of stainless steel.

[0016] Beneficial effects: Stainless steel is not easily deformed, ensuring the protective cover is firmly fixed.

[0017] Furthermore, high-temperature ceramic adhesive is provided between the mounting ring and the protective sleeve and inside the dispensing hole.

[0018] Beneficial effects: High-temperature ceramic adhesive is more conducive to the installation and fixing of ceramic materials.

[0019] Furthermore, multiple dispensing holes are provided in the circumferential direction of the flange.

[0020] Beneficial effects: If there is only one dispensing hole, damage to the dispensing hole will directly render the secondary reinforcement ineffective. Multiple dispensing holes can not only prevent the above situation, but also enhance the fixing strength of the secondary reinforcement.

[0021] Furthermore, multiple dispensing holes are evenly spaced along the circumference of the flange.

[0022] Beneficial effect: The equal distribution of multiple adhesive dispensing holes on the circumference of the flange ensures the uniformity of the secondary reinforcement strength between the flange and the protective sleeve.

[0023] Furthermore, the support sleeve is provided with two leads, and the flange is provided with two lead holes that correspond one-to-one with the leads and extend along the axial direction of the heating tube. The two leads pass through the corresponding lead holes to connect to an external power source. Attached Figure Description

[0024] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 for Figure 1 Sectional view in;

[0027] Figure 3 This is a schematic diagram of the heating tube structure;

[0028] Figure 4 This is a schematic diagram of the mounting ring structure;

[0029] Figure 5 This is a schematic diagram of the protective sleeve.

[0030] Figure 6 This is a schematic diagram of the flange structure.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Protective sleeve; 2. Mounting ring; 3. Flange; 4. Dispensing hole; 5. Lead wire hole; 6. Lead wire; 7. Silver electrode; 8. Heating tube body; 9. Support sleeve section; 10. Protective sleeve section; 11. Circular plug-in part; 12. Flange part; 13. Sliding groove section; 14. Snap-fit ​​groove section. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] The following describes various non-limiting embodiments of this utility model. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Embodiment 1 of a novel heating tube provided by this utility model:

[0036] like Figure 1 and Figure 2 As shown, a novel heating tube includes a flange 3, a heating tube body 8, a protective sleeve 1, and a mounting ring 2.

[0037] like Figure 1 and Figure 2 As shown, flange 3, heating tube body 8, and protective sleeve 1 are all made of the same ceramic material, ensuring that the coefficients of thermal expansion of flange 3, heating tube body 8, and protective sleeve 1 are consistent. This avoids internal stress and damage to the heating tube caused by thermal expansion and contraction, and maintains the reliability of the heating tube under different temperature changes. This material characteristic reduces the impact of thermal stress and further improves the service life of the heating tube.

[0038] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the protective sleeve 1 is fitted over the lower end of the heating tube body 8, and the heating tube body 8 is fixed inside the protective sleeve 1. The protective sleeve 1 includes a protective sleeve section 10 and a support sleeve section 9 connected together. The diameter of the support sleeve section 9 is larger than the diameter of the protective sleeve section 10. A mounting ring 2 is provided on one end of the protective sleeve section 10 near the support sleeve section 9. The inner diameter of the mounting ring 2 is smaller than the diameter of the support sleeve section 9. When the heating tube is installed, the mounting ring 2 presses against the support sleeve section 9 to prevent the protective sleeve 1 from slipping out of the mounting ring 2. The mounting ring 2 has two threaded holes evenly spaced along its circumference. The heating tube is fixed through the threaded holes on the mounting ring 2, eliminating the need to directly drill holes in the protective sleeve 1, thus preventing damage to the ceramic protective sleeve 1. The mounting ring 2 is made of stainless steel, which is not easily deformed, ensuring the protective sleeve 1 is firmly fixed. The function of the mounting ring 2 is to protect the protective sleeve 1, preventing mechanical damage to the surface of the protective sleeve 1 caused by screws or other accessories used to fix the heating tube body 8 in actual applications, thus protecting the protective sleeve 1. The mounting ring 2 and the protective sleeve 1 are fixedly connected by glue. After applying glue evenly to the corresponding area of ​​the protective sleeve 1 where the mounting ring 2 is installed, the mounting ring 2 is slowly inserted from the end of the protective sleeve 1 and moved upward to the corresponding position. After the glue solidifies, the mounting ring 2 is fixed.

[0039] like Figure 1 , Figure 2 and Figure 6 As shown, flange 3 is fitted onto the top of heating tube body 8. Flange 3 includes a circular insertion part 11 and a flange part 12 connected together. The diameter of flange part 12 is larger than the diameter of circular insertion part. Circular insertion part 11 is provided with two T-shaped grooves spaced apart in its circumferential direction. Both T-shaped grooves have a communicating sliding groove section 13 and a snap-fit ​​groove section 14. The inner wall of the support sleeve end 9 is provided with two protrusions 13 that correspond one-to-one with and fit into the T-shaped grooves. When the circular insertion part 11 is inserted into the support sleeve end 9, the two protrusions 13 can slide and engage with the corresponding sliding groove section 13. When the protective sleeve 1 is in the position corresponding to the protrusion 13 and the snap-fit ​​groove section 14, the protrusions 13 can be rotated and snapped into the snap-fit ​​groove section 14 to lock the protective sleeve 1 and flange 3.

[0040] like Figure 3 , Figure 5 and Figure 6As shown, the flange 3 has adhesive dispensing holes 4 extending along the axis of the heating tube 8. Four adhesive dispensing holes 4 are evenly spaced along the circumference of the flange 3. The adhesive dispensing holes 4 communicate with the inner cavity of the protective sleeve 1 at the insertion point of the flange 3 and the protective sleeve 1. The adhesive dispensing holes 4 form a through-hole structure on the flange portion 12 and a groove-shaped structure on the circular insertion portion 11, which is the same as the sliding groove section 13 mentioned above. Adhesive is injected into the adhesive dispensing holes 4, and the circular insertion portion 11 at the groove-shaped structure position is fixedly connected to the inner wall of the support sleeve end 9 by the adhesive. The operation is simple and does not require additional fixing structures, resulting in a simple structure. The adhesive provides secondary fixation to the flange 3 and the protective sleeve 1, enhancing the protective effect of the flange 3 and the protective sleeve 1 on the heating tube 8.

[0041] High-temperature ceramic adhesive is used between the mounting ring and the protective sleeve, as well as inside the dispensing hole. High-temperature ceramic adhesive is more conducive to the installation and fixation of ceramic materials.

[0042] like Figure 1 , Figure 3 and Figure 6 As shown, the heating tube body 8 is provided with two silver electrodes 7 arranged at intervals in its circumferential direction. Both silver electrodes 7 are connected to lead wires 6. The flange 3 is provided with two lead wire holes 5 corresponding to the lead wires 6. The lead wire holes 5 extend along the axial direction of the heating tube body 8 and are connected inside the flange 3. The two lead wires 6 pass through the corresponding lead wire holes 5 and are connected to an external power source.

[0043] The working process of this utility model is as follows:

[0044] In practical use, the heating tube 8 is installed inside the protective sleeve 1, the two leads 6 are passed through the corresponding lead holes 5, and the flange 3 is inserted into the protective sleeve 1. The flange 3 is rotated to lock the flange 3 and the protective sleeve 1. Glue is injected into the glue dispensing hole 4 to fix the flange 3 and the protective sleeve 1 for a second time. After evenly applying glue to the corresponding area of ​​the protective sleeve 1 where the mounting ring 2 is installed, the mounting ring 2 is slowly put on from the end of the protective sleeve 1 and moved upward to the corresponding position. After stopping and waiting for the glue to solidify, the mounting ring 2 is fixed. Finally, the two leads 6 are connected to the power supply.

[0045] Compared with stainless steel protective sleeves, the ceramic material used in the protective sleeve 1 has excellent thermal conductivity, enabling the heating tube 8 to quickly reach the required operating temperature, thus ensuring the high-efficiency heating capacity of the heating tube 8 and improving heating efficiency. The flange 3, heating tube 8, and protective sleeve 1 are all made of the same ceramic material, ensuring that their thermal expansion coefficients are consistent, avoiding internal stress and damage caused by thermal expansion and contraction, and maintaining the reliability of the heating tube under different temperature changes. This material characteristic reduces the impact of thermal stress and further improves the service life of the heating tube. The protective sleeve 1 has excellent insulation properties, effectively preventing short circuits or leakage caused by changes in the external environment or material damage, improving the internal circuit safety of the heating tube. The chemical inertness of the ceramic material allows the heating tube to be used in harsher environments, reducing performance degradation caused by corrosion or contamination. Furthermore, the ceramic protective sleeve 1 has a smooth surface and is heat-resistant, making it difficult for combustibles to adhere. Even if a small amount of residue adheres, it can be removed through a high-temperature self-cleaning effect, ensuring long-term stable and efficient operation of the heating tube.

[0046] Embodiment 2 of a novel heating tube provided by this utility model:

[0047] The main difference between this embodiment and Embodiment 1 is that in Embodiment 1, the flange and the protective sleeve are locked together by inserting and snapping together through a T-shaped groove and a protrusion. In this embodiment, glue can be directly injected between the flange and the protective sleeve to seal and fix them.

Claims

1. A novel heating element, characterized in that, Includes flange, heating tube body, and protective sleeve; The flange, heating tube body, and protective sleeve are all made of the same ceramic material. The flange is fitted on the top of the heating tube body, and the protective sleeve is fitted on the bottom of the heating tube body. The flange and the protective sleeve are inserted and snapped together. The flange has an adhesive dispensing hole extending along the axis of the heating tube. The adhesive dispensing hole communicates with the inner cavity of the protective sleeve at the part where the flange and the protective sleeve are inserted and mated.

2. The novel heating tube according to claim 1, characterized in that, The flange has a circular insertion part with a T-shaped groove. The T-shaped groove has a communicating sliding groove and a snap-fit ​​groove. The inner wall of the protective sleeve has a protrusion that can slide with the sliding groove. When the protective sleeve is in the position corresponding to the snap-fit ​​groove, the protrusion can be rotated and snapped into the snap-fit ​​groove to lock the protective sleeve and the flange.

3. A novel heating tube according to claim 2, characterized in that, The flange includes a flange portion and a circular insertion portion connected together, and the diameter of the flange portion is larger than the diameter of the circular insertion portion. The dispensing hole is a through hole structure on the flange portion and a groove structure on the circular insertion portion.

4. A novel heating tube according to claim 3, characterized in that, The protective sleeve includes a protective sleeve segment and a support sleeve segment connected together, with the protrusion located on the support sleeve segment, and the diameter of the support sleeve segment being larger than the diameter of the protective sleeve segment.

5. A novel heating tube according to claim 4, characterized in that, The protective sleeve is provided with a mounting ring at one end near the support sleeve. The inner diameter of the mounting ring is smaller than the diameter of the support sleeve. The mounting ring is provided with multiple threaded holes arranged at equal intervals in its circumferential direction.

6. A novel heating tube according to claim 5, characterized in that, The mounting ring is made of stainless steel.

7. A novel heating tube according to claim 6, characterized in that, High-temperature ceramic adhesive is applied between the mounting ring and the protective sleeve, and inside the dispensing hole.

8. A novel heating tube according to any one of claims 1-7, characterized in that, The dispensing holes are provided in multiple locations along the circumference of the flange.

9. A novel heating tube according to claim 8, characterized in that, Multiple dispensing holes are evenly spaced along the circumference of the flange.

10. A novel heating tube according to claim 4 or 5, characterized in that, The support sleeve is provided with two lead wires, and the flange is provided with two lead wire holes that correspond one-to-one with the lead wires and extend along the axial direction of the heating tube body. The two lead wires pass through the corresponding lead wire holes and are connected to an external power source.

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