Infrared radiator with explosion-proof function
By employing a double-layer protective structure and a gas circulation system, the safety hazards of infrared radiators in flammable and explosive environments are resolved. Temperature control and gas isolation are achieved, improving explosion-proof performance and safety, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING DANLIAN TECH CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional infrared radiators pose a problem in flammable and explosive environments: the surface temperature of the quartz tube is too high, which can ignite surrounding flammable and dangerous gases. Direct contact between these gases and the high-temperature radiator surface can lead to decomposition and explosion. Current technologies cannot achieve dynamic temperature control and gas isolation.
It adopts a double-layer protective structure and a gas circulation system, including an explosion-proof sleeve, an inlet pipe and an outlet pipe. The gas circulation creates a slightly positive pressure environment, and combined with a temperature measuring thermocouple, it monitors the temperature to achieve isolation and temperature control of the heating space.
It effectively reduces pipe wall temperature by 60℃-150℃, prevents external gas penetration by more than 90%, extends service life by 40%, adapts to existing standard sizes, and improves heating efficiency and safety.
Smart Images

Figure CN224304245U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of infrared heating technology, specifically to an infrared radiator with explosion-proof function. Background Technology
[0002] Infrared radiators are devices used in fields such as infrared transceivers, data transmission technology, and electronics. An infrared transmitter is a remote control device that emits light within a certain range using an infrared emitting tube to achieve a control signal effect; it is widely used in consumer electronics, industry, and communications.
[0003] However, traditional infrared radiators pose two major risks when used in flammable and explosive environments:
[0004] (1) The surface temperature of the quartz tube is too high, which may ignite the surrounding combustible gases;
[0005] (2) Special process gases are prone to decomposition and explosion when they come into direct contact with the surface of high-temperature radiators. Existing technologies mostly use a single quartz sleeve for protection, which cannot achieve dynamic temperature control and gas isolation. Utility Model Content
[0006] The purpose of this invention is to provide an infrared radiator that effectively solves the problem of pipe wall overheating and contact with dangerous gases by combining a double-layer protective structure with a gas circulation system, thereby addressing the problems mentioned in the background art.
[0007] To solve the above-mentioned technical problems, this utility model provides an infrared radiator with explosion-proof function, including an explosion-proof sleeve. An air inlet flange and an air outlet flange are respectively installed at both ends of the explosion-proof sleeve. An air outlet pipe communicating with the explosion-proof sleeve is installed at the air outlet flange through an air outlet docking flange. An air inlet pipe communicating with the explosion-proof sleeve is installed at the air inlet flange through an air inlet docking flange. An explosion-proof aviation plug is installed on the air inlet docking flange. Inside the explosion-proof sleeve, there is a lamp tube arranged parallel to the explosion-proof sleeve along its axis. Inside the lamp tube, a heating filament is installed through several bracket rings. At the end of the lamp tube near the air inlet pipe, a ceramic head is installed through ceramic powder. A lamp tube wire connected to the explosion-proof aviation plug is provided at the ceramic head.
[0008] Furthermore, a flow meter is installed on the air intake pipe.
[0009] Furthermore, the explosion-proof sleeve is a colorless and transparent sleeve.
[0010] Furthermore, a temperature-measuring thermocouple is installed on the outside of the colorless transparent sleeve.
[0011] Furthermore, the support ring is evenly distributed along the axial direction of the heating filament.
[0012] Furthermore, the heating filaments are connected by connecting hooks.
[0013] Furthermore, the explosion-proof sleeve is a quartz sleeve.
[0014] Compared with existing technologies, the overall structure of this utility model seals the heating lamp tube within the sleeve, ensuring isolation between the heater's internal space and the required heating chamber. The sleeve and heating lamp tube are positioned using mechanical positioning blocks, ensuring the stability of the radiator during operation. A gold-plated coating on the outer side of the radiating gas reflects most of the infrared radiation from the back to the front of the radiator, increasing radiation power, improving heating efficiency, and shortening heating time. This utility model provides an infrared radiator with explosion-proof functionality. Through a double-layer protective structure, it isolates the heating space from the heated object or space, forming an independent system, effectively solving the problems of tube wall overheating and contact with hazardous gases.
[0015] The beneficial effects of this invention are as follows:
[0016] 1. Improved explosion-proof performance: Dual-mode gas circulation reduces pipe wall temperature by 60℃-150℃;
[0017] 2. Enhanced safety: The positive pressure environment prevents more than 90% of external gas penetration;
[0018] 3. Extended service life: quartz tube thermal stress is reduced by 40%;
[0019] 4. High compatibility: Adapts to existing standard radiator sizes. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] An explosion-proof infrared radiator includes an explosion-proof sleeve 5. An inlet flange and an outlet flange 4 are installed at both ends of the explosion-proof sleeve 5. An outlet pipe 1, communicating with the explosion-proof sleeve, is installed at the outlet flange 4 via an outlet connecting flange 3. An inlet pipe 11, communicating with the explosion-proof sleeve, is installed at the inlet flange via an inlet connecting flange. An explosion-proof aviation connector 12 is installed on the inlet connecting flange. Inside the explosion-proof sleeve 5, a lamp tube 6 is arranged parallel to the explosion-proof sleeve along its axial direction. A heating filament 8 is installed inside the lamp tube 6 via several support rings 14. A ceramic head 7 is installed at the end of the lamp tube near the inlet pipe using ceramic powder. A lamp tube lead 9, connecting to the explosion-proof aviation connector, is located at the ceramic head. The explosion-proof sleeve is sealed internally by the inlet connecting flange and the outlet connecting flange 3. The outlet flange 4 and the outlet connecting flange 3, as well as the inlet flange and the inlet connecting flange, are all fixedly connected by fastening bolts 2. The infrared radiator uses a non-wireless direct output at one end, and the wire connection is made by using an explosion-proof aviation connector 12. The inlet pipe 11 and the outlet pipe 1 at the other end form an independent spatial circulation that is isolated from the outside, forming an airflow channel. The airflow channel is formed by a 3mm annular gap between the inner wall of the explosion-proof sleeve 55 and the outer surface of the lamp tube 6.
[0024] A flow meter 10 is installed on the air intake pipe. The explosion-proof sleeve is a colorless and transparent sleeve. The explosion-proof sleeve 5 is a quartz sleeve. The explosion-proof sleeve 5 is colorless, transparent, and has high light transmittance. The material used is corrosion-resistant, high-temperature resistant, and moisture-resistant. A temperature measuring thermocouple is provided on the outside of the colorless and transparent sleeve. The support ring is evenly distributed along the axis of the heating filament. The heating filaments are connected by connecting hooks 13. The lamp tubes are connected by connecting hooks 13 made of multiple strands of tungsten wire. The explosion-proof sleeve 5 of this invention is a cylindrical structure with an inner diameter of 26mm and an outer diameter of 36mm.
[0025] The overall structure of this invention can be customized to meet various operational requirements by coordinating with mechanical structures according to the shape of the heated object. During operation, it utilizes the advantages of short-wave infrared radiators—low thermal inertia, high thermal efficiency, rapid heating, wide range of heated objects, and extremely short heating and cooling times—in conjunction with a transparent, high-emissivity sleeve, enabling rapid heating and quick cessation of heating. This invention employs inlet and outlet pipes to allow the introduction of protective gases (such as nitrogen) or forced air convection, creating a continuous airflow through gaps and establishing an inert gas environment; forced convection cooling (cooling effect reaches 50% when flow velocity ≥ 2 m / s). This invention achieves dual isolation protection: physical isolation: the explosion-proof sleeve 5 forms a sealed first barrier; gas pressure isolation: a positive pressure of 0.2-0.5 mPa is maintained inside the explosion-proof sleeve 5 to prevent external gas infiltration. Intelligent monitoring is achieved using a temperature sensor.
[0026] During installation, the heating lamp is placed into the explosion-proof sleeve 5, and the outlet flange 3 and the inlet flange are locked and sealed to the corresponding open ends of the explosion-proof sleeve 5 with fastening bolts. During operation, protective gas is injected through the inlet pipe 11 and gas flows out through the outlet pipe 1, maintaining a slightly positive pressure environment inside the sleeve.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An infrared radiator with explosion-proof function, characterized in that: The device includes an explosion-proof sleeve, with an inlet flange and an outlet flange installed at both ends. An outlet pipe communicating with the explosion-proof sleeve is installed at the outlet flange via an outlet connecting flange, and an inlet pipe communicating with the explosion-proof sleeve is installed at the inlet flange via an inlet connecting flange. An explosion-proof aviation plug is installed on the inlet connecting flange. Inside the explosion-proof sleeve, there is a lamp tube arranged parallel to the explosion-proof sleeve along its axial direction. Inside the lamp tube, a heating filament is installed through several bracket rings. At the end of the lamp tube near the inlet pipe, a ceramic head is installed through ceramic powder, and a lamp tube wire connected to the explosion-proof aviation plug is provided at the ceramic head.
2. The infrared radiator with explosion-proof function as described in claim 1, characterized in that: A flow meter is installed on the air intake pipe.
3. The infrared radiator with explosion-proof function as described in claim 1, characterized in that: The explosion-proof sleeve is a colorless and transparent sleeve.
4. The infrared radiator with explosion-proof function as described in claim 1, characterized in that: A thermocouple is installed on the outside of the colorless and transparent sleeve.
5. The infrared radiator with explosion-proof function as described in claim 1, characterized in that: The support rings are evenly distributed along the axial direction of the heating filament.
6. The infrared radiator with explosion-proof function as described in claim 1, characterized in that: The heating filaments are connected by a connecting hook.
7. The infrared radiator with explosion-proof function as described in claim 1, characterized in that: The explosion-proof sleeve is a quartz sleeve.