U-shaped hollow electric heating radiant tube

Abstract

The utility model provides a U-shaped hollow pipe electric heating radiant tube which comprises a U-shaped hollow pipe, a heat insulation shell, a temperature controller, a connecting pipe, a fixing plate and a wire holder, a resistance wire is arranged in the U-shaped hollow pipe, and the fixing plate is arranged on the side, away from the U-shaped hollow pipe, of the heat insulation shell; the temperature controller is connected with the resistance wire, the wire holder is arranged on the fixing plate, electrode wiring terminals are arranged on the wire holder, and the two ends of the connecting pipe are connected with the temperature controller and the corresponding electrode wiring terminals respectively. The heat insulation shell is arranged at the end of the U-shaped hollow pipe, the fixing plate, the wire holder, the connecting pipe, the temperature controller and other devices can be conveniently installed, heat can be prevented from entering the heat insulation shell and being dissipated out of the heat insulation shell, heat energy loss can be reduced, the heating efficiency can be kept, the built-in temperature controller can further ensure that heat energy output is controllable and stable, and the service life of the device is prolonged. Precise adjustment is allowed to meet specific heating requirements, and the efficient heat control not only saves energy, but also improves the overall efficiency of the heating process.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating radiant tubes, in particular to a U-shaped hollow tube electric heating radiant tube. Background Art

[0002] In modern industrial production and scientific research, precise temperature control and efficient thermal energy management have become key factors in improving production efficiency and product quality. Especially in the chemical, food processing, plastic manufacturing and semiconductor industries, the demand for heating technology is becoming increasingly stringent and diverse.

[0003] Electric heating technology, especially the technology using high-efficiency electric heating elements such as resistance wire and professionally designed insulation structure, has developed rapidly. Electric heating provides advantages such as high energy efficiency, easy control and environmental friendliness. At present, the commonly used electric heating equipment is mainly electric heating radiant tube, which is a device that converts electrical energy into thermal energy to heat the material to be heated. The electric heating element is enclosed in a protective sleeve. After power is turned on for heating, the sleeve indirectly radiates heat to the furnace lining and the heated workpiece. It is widely used in various heat treatment industrial furnaces.

[0004] However, current electric heating radiant tubes still have problems such as heat loss and unstable output control, and need to be improved to save energy and meet specific heating needs in production. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a U-shaped hollow tube electric heating radiation tube to reduce energy waste, improve heating efficiency, and improve thermal energy control stability.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A U-shaped hollow tube electric heating radiant tube, comprising a U-shaped hollow tube, an insulating shell, a temperature controller, a connecting tube, a fixing plate and a terminal block, wherein a resistance wire is provided inside the U-shaped hollow tube, the insulating shell is provided at the end of the U-shaped hollow tube, and the fixing plate is provided at a side of the insulating shell away from the U-shaped hollow tube; the temperature controller and the connecting tube are respectively provided in the insulating shell, the temperature controller is connected to the resistance wire, the terminal block is provided on the fixing plate, the terminal block is provided with electrode terminals, and the two ends of the connecting tube are respectively connected to the temperature controller and the corresponding electrode terminals.

[0008] Preferably, the ends of the resistance wire are respectively connected with terminal blocks, the terminal blocks correspond to the connection between the U-shaped hollow tube and the thermal insulation shell, and the terminal blocks are connected to the thermostat.

[0009] Preferably, a seal is provided between the electrode terminal and the connecting tube.

[0010] Preferably, the inner wall of the heat-insulating shell is provided with a heat-insulating layer.

[0011] Preferably, a plurality of fasteners are provided on the fixing plate.

[0012] Preferably, the wall thickness of the U-shaped hollow tube is 2.8 mm to 3.2 mm.

[0013] Preferably, the resistance wire is a nickel-chromium alloy.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: in the U-shaped hollow tube electric heating radiant tube, an insulating shell is arranged at the end of the U-shaped hollow tube, which is convenient for the installation of components such as fixing plates, terminal blocks, connecting pipes, and thermostats, and can prevent heat from entering the insulating shell and dissipating from the insulating shell part, thereby reducing heat energy loss and maintaining heating efficiency. The built-in thermostat can further ensure that the heat energy output is controllable and stable, allowing precise adjustment to meet specific heating requirements. This efficient thermal control not only saves energy, but also improves the overall efficiency of the heating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a U-shaped hollow tube electric heating radiant tube according to an embodiment of the utility model.

[0016] Figure 2 It is a schematic structural diagram of the heat-insulating shell in one embodiment of the utility model.

[0017] Figure 3 It is a cross-sectional view of a U-shaped hollow tube electric heating radiant tube according to an embodiment of the utility model.

[0018] Figure 4 for Figure 3 A magnified view of the structure at center.

[0019] In the figure: 1. Insulating shell; 2. Fixing plate; 3. Terminal block; 4. Fastener; 5. Electrode connecting terminal; 6. Seal; 7. Insulating layer; 8. Connecting pipe; 9. Thermostat; 10. U-shaped hollow pipe; 11. Terminal block; 12. Resistance wire. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model. It can be understood that some technical means of the various embodiments described herein can be replaced or combined with each other without conflict.

[0021] In the description of the present invention, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described, and do not have any order or technical meaning. Therefore, the objects defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects. Moreover, "one" or "a" and similar words do not indicate a quantity limitation, but indicate the existence of at least one, and "multiple" means not less than two.

[0022] In the description of the utility model specification, reference to "one embodiment" or "some embodiments" etc. means that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in the specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0023] Please refer to Figures 1 to 4 The utility model provides a U-shaped hollow tube electric heating radiation tube, which includes a U-shaped hollow tube 10, an insulating shell 1, a temperature controller 9, a connecting tube 8 (electrode lead-out tube), a fixing plate 2 and a terminal block 3. A resistance wire 12 is arranged inside the U-shaped hollow tube 10. The insulating shell 1 is arranged at the end of the U-shaped hollow tube 10, and the fixing plate 2 is arranged on the side of the insulating shell 1 away from the U-shaped hollow tube 10. The temperature controller 9 and the connecting tube 8 are respectively arranged in the insulating shell 1, the temperature controller 9 is connected to the resistance wire 12, the terminal block 3 is arranged on the fixing plate 2, and the terminal block 3 is provided with an electrode terminal 5 (including a positive terminal and a negative terminal) for establishing a circuit connection and fixing circuit components. The two ends of the connecting tube 8 are respectively connected to the temperature controller 9 and the corresponding electrode terminal 5.

[0024] Among them, the resistance wire 12 can be made of high-quality electric heating alloy materials, such as nickel-chromium alloy, which can provide stability and reliability at high temperatures; the thermal insulation shell 1 can be made of high-quality stainless steel, which has strong corrosion resistance and mechanical strength, ensuring durability in long-term use; a fixing plate 2 is provided to facilitate fixing the electric heating radiation tube to various industrial equipment; the electrode terminal 5 includes a positive terminal and a negative terminal, which are respectively used to connect to the positive and negative poles of the power supply; the thermostat 9 can adopt a commercially available thermostat product according to actual conditions, which is used to monitor and adjust the temperature of the U-shaped hollow tube 10, ensuring that the heating process is carried out within a safe and predetermined temperature range, and ensuring temperature control accuracy and stability.

[0025] In the above-mentioned U-shaped hollow tube electric heating radiant tube, an insulating shell 1 is set at the end of the U-shaped hollow tube 10, which is convenient for the installation of components such as the fixing plate 2, the terminal block 3, the connecting pipe 8, and the thermostat 9, and can prevent heat from entering the insulating shell 1 and dissipating from the insulating shell 1, thereby reducing heat energy loss and maintaining heating efficiency. The built-in thermostat 9 can further ensure that the heat energy output is controllable and stable, allowing precise adjustment to meet specific heating requirements. This efficient thermal control not only saves energy, but also improves the overall efficiency of the heating process.

[0026] Reference Figure 4 In some embodiments, the ends of the resistance wire 12 are respectively connected with terminal blocks 11, the terminal blocks 11 correspond to the connection between the U-shaped hollow tube 10 and the heat-insulating shell 1, and the terminal blocks 11 are connected to the thermostat 9. The terminal blocks 11 can be made of copper, copper alloy and other materials. The terminal blocks 11 not only provide a stable electrical connection point, but also facilitate the connection and disconnection of the power supply. When the current passes through the resistance wire 12, the heat generated by it is radiated outward through the U-shaped hollow tube 10.

[0027] In some embodiments, a seal 6 is provided between the electrode terminal 5 and the connecting tube 8. The seal may be a ceramic seal to ensure the sealing of the connection, ensure the safety of the electrical connection, and prevent any potential leakage risk or electrical failure.

[0028] In some embodiments, the inner wall of the heat-insulating shell 1 is provided with a heat-insulating layer 7. The heat-insulating layer 7 can be made of suitable heat-insulating materials such as graphite, ceramic fiber, etc. according to actual conditions to enhance the heat-insulating performance.

[0029] In some embodiments, a plurality of fasteners 4 are provided on the fixing plate 2 for fixing the electric heating radiant tube to the industrial equipment.

[0030] In some embodiments, the wall thickness of the U-shaped hollow tube 10 is 2.8 mm to 3.2 mm to ensure sufficient structural strength and heat conduction efficiency.

[0031] In the U-shaped hollow tube electric heating radiant tube of the utility model, the coordinated work of various components ensures effective thermal control and safe operation. An insulating shell is provided at the end of the U-shaped hollow tube, which is convenient for the installation of components such as fixing plates, terminal blocks, connecting pipes, and thermostats, and can prevent heat from entering the insulating shell and dissipating from the insulating shell part, thereby reducing heat energy loss and maintaining heating efficiency. The built-in thermostat can further ensure that the heat energy output is controllable and stable, allowing precise adjustment to meet specific heating needs. This efficient thermal control not only saves energy, but also improves the overall efficiency of the heating process.

[0032] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A U-shaped hollow tube electric heating radiant tube, characterized in that: The U-shaped hollow tube electric heating radiant tube includes a U-shaped hollow tube, an insulating shell, a temperature controller, a connecting tube, a fixing plate and a terminal block. A resistance wire is provided inside the U-shaped hollow tube. The insulating shell is provided at the end of the U-shaped hollow tube. The fixing plate is provided on the side of the insulating shell away from the U-shaped hollow tube. The temperature controller and the connecting tube are respectively provided in the insulating shell. The temperature controller is connected to the resistance wire. The terminal block is provided on the fixing plate. The terminal block is provided with electrode terminals. The two ends of the connecting tube are respectively connected to the temperature controller and the corresponding electrode terminals.

2. The U-shaped hollow tube electric heating radiant tube according to claim 1, characterized in that: The ends of the resistance wire are respectively connected with terminal blocks, the terminal blocks correspond to the connection between the U-shaped hollow tube and the heat-insulating shell, and the terminal blocks are connected to the temperature controller.

3. The U-shaped hollow tube electric heating radiant tube according to claim 1, characterized in that: A sealing member is provided between the electrode terminal and the connecting tube.

4. The U-shaped hollow tube electric heating radiant tube according to claim 1, characterized in that: The inner wall of the heat-insulating shell is provided with a heat-insulating layer.

5. The U-shaped hollow tube electric heating radiant tube according to claim 1, characterized in that: A plurality of fasteners are arranged on the fixing plate.

6. The U-shaped hollow tube electric heating radiant tube according to claim 1, characterized in that: The wall thickness of the U-shaped hollow tube is 2.8 mm to 3.2 mm.

7. The U-shaped hollow tube electric heating radiant tube according to claim 1, characterized in that: The resistance wire is a nickel-chromium alloy.

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