A high-strength, high-temperature resistant titanium alloy thick-film heating tube

Abstract

This utility model discloses a high-strength, high-temperature resistant titanium alloy thick-film heating tube, belonging to the technical field of heating components. It includes a base tube with an insulating layer, and an outer ring of the insulating layer with a conductive layer and a resistive layer. The key feature is that annular reinforcing ribs are fixed to both sides of the inner wall of the base tube, and a spiral reinforcing rib between the two annular reinforcing ribs is fixedly connected to the inner wall of the base tube. The left and right sides of the base tube respectively have an inlet and an outlet end. Support members are fixed to the inner walls of both the inlet and outlet ends. A spiral rod extending into the inner cavity of the base tube is fixed to the right support member, with the other end of the spiral rod penetrating the left support member. External grooves at the inlet and outlet ends hold a protective encapsulation layer. This utility model can improve the mechanical strength and heat exchange effect of the heating tube.

Description

Technical Field

[0001] This utility model relates to the field of heating component technology, and in particular to a high-strength, high-temperature resistant titanium alloy thick film heating tube. Background Technology

[0002] Conventional metal heating tubes, such as stainless steel and nickel-chromium alloys, are prone to deformation due to thermal expansion in high-temperature environments, which can lead to tube breakage. Furthermore, existing heating tubes typically employ a single-layer metal tube or a simple support structure design, making it difficult to effectively improve their pressure-bearing capacity. In particular, their structural strength is significantly insufficient under high-pressure environments. Utility Model Content

[0003] The purpose of this invention is to improve the mechanical strength and heat exchange effect of the heating element.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a high-strength, high-temperature resistant titanium alloy thick-film heating tube, comprising a substrate tube, an insulating layer, a conductive layer and a resistive layer on the outer ring of the insulating layer, characterized in that: annular reinforcing ribs are fixed on both the left and right sides of the inner wall of the substrate tube, a spiral reinforcing rib between the two annular reinforcing ribs is fixedly connected to the inner wall of the substrate tube, an inlet end and an outlet end are respectively provided on the left and right sides of the substrate tube, a support member is fixed on the inner wall of both the inlet end and the outlet end, a spiral rod extending into the inner cavity of the substrate tube is fixed on the right support member, the other end of the spiral rod passes through the left support member, and an outer groove is provided on the inlet end and the outlet end to hold an encapsulation protective layer.

[0005] As a further description of the above technical solution: the substrate tube is made of high temperature and corrosion resistant titanium alloy, and the insulating layer is composed of materials such as aluminum oxide, silicon nitride or titanium oxide.

[0006] As a further description of the above technical solution: the encapsulation protective layer is disposed outside the substrate tube, and a temperature sensor and a control circuit are installed inside the encapsulation protective layer, with the control circuit electrically connected to the temperature sensor.

[0007] As a further description of the above technical solution: the ends of the two sides of the substrate tube are respectively inserted into the inner grooves provided at the water inlet and water outlet, and a sealing ring is embedded on the groove wall of the inner groove.

[0008] As a further description of the above technical solution: both the water inlet and the water outlet are provided with screws on their outer rings, and the screw threads penetrate the water inlet, the water outlet, and the base material tube.

[0009] As a further description of the above technical solution: the outer surface of the substrate tube is covered with a layer of alumina ceramic.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0011] 1. The base tube is made of titanium alloy, which has excellent tensile strength. The annular reinforcing ribs provide radial support for the tube body, thereby significantly improving its pressure-bearing capacity under high pressure. At the same time, the application of spiral reinforcing ribs further enhances the mechanical strength of the base tube, ensuring that it can withstand extreme mechanical loads in various industrial applications, thereby extending its service life and reducing the risk of failure.

[0012] 2. When the fluid enters the tube, the screw forces the fluid to change from a straight flow to a spiral flow. This spiral flow increases the contact time between the fluid and the inner wall of the substrate tube, thereby achieving a more uniform heating effect. Combined with the temperature sensor and control circuit, the temperature of the substrate tube can be monitored in real time and the data can be fed back to the control circuit.

[0013] 3. The support is used to fix the screw rod to ensure that the screw rod is always kept in the correct position and to prevent loosening or displacement due to fluid impact or vibration. At the same time, the support connects the water inlet and water outlet to form a more stable support structure, thereby significantly improving the high pressure resistance of the heating tube end and reducing the risk of deformation or cracking. Attached Figure Description

[0014] Figure 1 A front view of the present invention is shown;

[0015] Figure 2 A partial front view of the present invention is shown;

[0016] Figure 3 A perspective view of the substrate tube of this utility model is shown;

[0017] Figure 4 A cross-sectional view of the substrate tube of this utility model is shown;

[0018] Figure 5 A perspective view of the support member and the screw rod of this utility model is shown.

[0019] Legend:

[0020] 10. Substrate tube; 11. Insulating layer; 12. Conductive layer; 13. Resistive layer; 14. Annular reinforcing rib; 15. Spiral reinforcing rib; 16. Water inlet end; 17. Water outlet end; 18. Support component; 19. Encapsulation protective layer; 191. Temperature sensor; 192. Control circuit;

[0021] 20. Helical rod; 21. Sealing ring; 22. Screw; 23. Alumina ceramic layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 This utility model provides a technical solution: a high-strength, high-temperature resistant titanium alloy thick film heating tube, including a substrate tube 10, an insulating layer 11, a conductive layer 12 and a resistive layer 13 on the outer ring of the insulating layer 11, the conductive layer 12 is made of a high-temperature resistant conductive material to improve its conductivity, and the resistive layer 13 is made of a high-temperature corrosion resistant ceramic thick film material, such as barium titanate, molybdenum oxide or tin oxide; the conductive layer 12 and the resistive layer 13 are uniformly deposited on the surface of the insulating layer 11 by screen printing or magnetron sputtering technology.

[0024] Furthermore, the substrate tube 10 is made of high-temperature and corrosion-resistant titanium alloy to enhance the mechanical strength and durability of the heating tube. In addition, to further improve the performance of the substrate tube 10, the manufacturing process also includes precision turning, wire drawing and polishing of the tube surface. The purpose of these surface treatment processes is to improve the smoothness of the tube surface, thereby reducing the possibility of coating peeling. The insulation layer 11 is made of materials such as alumina, silicon nitride or titanium oxide, which can provide good high-temperature insulation performance and corrosion resistance. In addition, the insulation layer 11 is uniformly coated on the surface of the substrate tube 10 through plasma spraying, sputtering deposition or vacuum evaporation technology.

[0025] Furthermore, annular reinforcing ribs 14 are fixed on both sides of the inner wall of the substrate tube 10, and a spiral reinforcing rib 15 between the two annular reinforcing ribs 14 is fixedly connected to the inner wall of the substrate tube 10. The annular reinforcing ribs 14 and the spiral reinforcing rib 15 can provide support for the substrate tube 10, thereby greatly improving the pressure-bearing capacity of the substrate tube 10 under high pressure. The connection of the reinforcing ribs adopts welding or brazing technology suitable for titanium alloys to ensure a firm and reliable connection with the substrate tube 10.

[0026] Furthermore, the base material tube 10 is provided with an inlet end 16 and an outlet end 17 on the left and right sides respectively, serving as the fluid inlet and outlet. The inner walls of the inlet end 16 and the outlet end 17 are both fixed with support members 18. The right support member 18 is fixed with a spiral rod 20 extending into the inner cavity of the base material tube 10. The other end of the spiral rod 20 passes through the left support member 18. The spiral rod 20 is fixed to the right support member 18 by welding or mechanical fastening.

[0027] The support member 18 is used to fix the screw rod 20 to ensure that the screw rod 20 is always kept in the correct position and to prevent loosening or displacement due to fluid impact or vibration. At the same time, the support member 18 connects the water inlet end 16 and the water outlet end 17 to form a more stable support structure, thereby significantly improving the high pressure resistance of the heating tube end and reducing the risk of deformation or cracking. In addition, the support member 18 is provided with several fan-shaped holes, which can ensure that the fluid passes through smoothly without obstruction.

[0028] The screw rod 20 ensures that the fluid changes from direct flow to spiral flow when entering the heating tube, reducing the fluid flow velocity, making the fluid heated evenly, and avoiding excessive local temperature.

[0029] Furthermore, the inlet end 16 and the outlet end 17 are provided with external grooves to hold the encapsulation protection layer 19. The encapsulation protection layer 19 is disposed outside the substrate tube 10 and is made of high-temperature resistant polymer or ceramic material to protect the internal electronic components from the effects of harsh environments.

[0030] The encapsulation protective layer 19 houses a temperature sensor 191 and a control circuit 192. The control circuit 192 is electrically connected to the temperature sensor 191. The temperature sensor 191 and the control circuit 192 are used to monitor the heating temperature in real time and perform intelligent temperature control adjustment through the control circuit 192 to ensure that the equipment operates within a safe and stable temperature range.

[0031] Furthermore, the ends of the base tube 10 on both sides are inserted into the inner grooves provided in the water inlet end 16 and the water outlet end 17, respectively. A sealing ring 21 is embedded in the groove wall of the inner groove. The sealing ring 21 is made of high temperature resistant silicone material to ensure sealing and prevent leakage.

[0032] Furthermore, both the inlet end 16 and the outlet end 17 are equipped with screws 22 on their outer rings. The screws 22 are threaded through the inlet end 16, the outlet end 17 and the base tube 10. This design simplifies the replacement process of the heating tube without the need for welding or other complicated fixing methods.

[0033] Furthermore, the outer surface of the substrate tube 10 is covered with an alumina ceramic layer 23, which further enhances the high temperature resistance and oxidation resistance of the heating tube, ensuring long-term stable operation.

[0034] Work steps:

[0035] The current first enters the conductive layer 12, which acts as an electrode to distribute the current evenly to the resistive layer 13. When the current flows through the resistive layer 13, the electrical energy is converted into heat energy. The heat generated by the resistive layer 13 is transferred to the titanium alloy substrate tube 10 through the insulating layer 11. The main function of the insulating layer 11 is to ensure that the current does not flow directly to the metal substrate tube 10, thereby avoiding short circuit.

[0036] After the substrate tube 10 absorbs heat, it will transfer the heat to the fluid flowing through its inner cavity. In order to improve the heat transfer efficiency and uniformity, a spiral rod 20 is provided in the inner cavity of the substrate tube 10. When the fluid enters the tube cavity, the spiral rod 20 will force the fluid to change from a straight flow to a spiral flow. This spiral flow increases the contact area and contact time between the fluid and the inner wall of the heating tube, and promotes the mixing of the fluid, so that all parts of the fluid can be heated more uniformly.

[0037] The temperature sensor 191 located inside the encapsulation protective layer 19 monitors the temperature of the heating tube in real time and transmits the temperature data to the control circuit 192. The control circuit 192 automatically adjusts the current supplied to the conductive layer 12 according to the preset temperature value. If the temperature exceeds the set value, the control circuit 192 will reduce the current to reduce the heat generation; if the temperature is lower than the set value, it will increase the current to increase the heat generation, thereby maintaining the heating tube in the set temperature range.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-strength, high-temperature resistant titanium alloy thick-film heating tube, comprising a substrate tube (10), the substrate tube (10) having an insulating layer (11), and an outer ring of the insulating layer (11) having a conductive layer (12) and a resistive layer (13), characterized in that: The inner wall of the substrate tube (10) is fixed with annular reinforcing ribs (14) on both the left and right sides. The spiral reinforcing ribs (15) between the two annular reinforcing ribs (14) are fixedly connected to the inner wall of the substrate tube (10). The left and right sides of the substrate tube (10) are respectively provided with an inlet end (16) and an outlet end (17). The inner walls of the inlet end (16) and the outlet end (17) are fixed with support members (18). The right support member (18) is fixed with a spiral rod (20) extending into the inner cavity of the substrate tube (10). The other end of the spiral rod (20) passes through the left support member (18). The inlet end (16) and the outlet end (17) are provided with an outer groove to hold the encapsulation protective layer (19).

2. The high-strength, high-temperature resistant titanium alloy thick-film heating tube according to claim 1, characterized in that: The substrate tube (10) is made of high temperature and corrosion resistant titanium alloy, and the insulating layer (11) is made of aluminum oxide, silicon nitride or titanium oxide.

3. The high-strength, high-temperature resistant titanium alloy thick-film heating tube according to claim 1, characterized in that: The encapsulation protective layer (19) is disposed outside the substrate tube (10). A temperature sensor (191) and a control circuit (192) are installed inside the encapsulation protective layer (19). The control circuit (192) is electrically connected to the temperature sensor (191).

4. The high-strength, high-temperature resistant titanium alloy thick-film heating tube according to claim 1, characterized in that: The ends of the substrate tube (10) on both sides are inserted into the inner grooves provided in the water inlet end (16) and the water outlet end (17), respectively, and the groove walls of the inner grooves are inlaid with sealing rings (21).

5. A high-strength, high-temperature resistant titanium alloy thick-film heating tube according to claim 1, characterized in that: Both the inlet end (16) and the outlet end (17) are provided with screws (22) on their outer rings. The screws (22) are threaded through the inlet end (16), the outlet end (17) and the base material tube (10).

6. The high-strength, high-temperature resistant titanium alloy thick-film heating tube according to claim 1, characterized in that: The outer surface of the substrate tube (10) is covered with an alumina ceramic layer (23).

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