Explosion-proof microwave source magnetron waveguide integrated device

Abstract

The utility model discloses an explosion-proof microwave source magnetron waveguide integrated device, which comprises a waveguide cavity, a magnetron, a filtering cavity and a power supply circulating cooling module, a waveguide and a magnetron frame are integrally designed to serve as a magnetron protective cover, an electronic circuit is exposed and emits heat, the part forming a closed cavity is filled with high-temperature-resistant heat dissipation silica gel with a low dielectric constant value in a sealed mode, and the part is isolated from environmental air in an oil gas area. A water-cooling type cooling mode magnetron is selected, an oil-immersed type cooling mode is selected for a microwave power supply, low-temperature transformer oil serves as cooling liquid, the transformer oil serves as the cooling liquid for the microwave power supply and also serves as the cooling liquid for a water jacket of the water-cooling type magnetron, and two functions are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of petrochemical equipment, specifically relating to an explosion-proof microwave source magnetron waveguide integrated device. Background Technology

[0002] The microwave heating device mainly consists of three independent parts: a microwave power supply, a magnetron, and a waveguide. The magnetron antenna is inserted into the waveguide, and the magnetron and the waveguide are fixedly connected by screws. The whole device needs to be enclosed in a protective box for outdoor use. Because the magnetron and the microwave source generate a lot of heat when they are working, heat dissipation is a major challenge.

[0003] In industrial microwave heating applications, neither magnetrons nor microwave power supplies meet explosion-proof requirements for hazardous oil and gas areas. This is primarily because the magnetron filter coil, exposed parts of the transmitting antenna, and high voltage at the power supply wiring points are prone to ionization sparks, posing safety hazards. Air-cooled microwave power supplies also lack explosion-proof certification, limiting the widespread adoption of microwave heating methods in areas requiring such certification. Therefore, a microwave heating device that meets explosion-proof requirements and can be used directly outdoors is needed to address these needs. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof integrated microwave source magnetron waveguide device that meets explosion-proof requirements.

[0005] The purpose of this utility model is achieved through the following technical means: an explosion-proof microwave source magnetron waveguide integrated device, including a waveguide cavity, a magnetron, a filter cavity, and a power supply circulation cooling module;

[0006] An inductor coil is installed inside the filter cavity, and the rest of the filter cavity is filled with sealant. The filter cavity is connected to the magnetron, and the inductor coil is connected to the input terminal of the magnetron.

[0007] The magnetron is connected to the waveguide cavity. The waveguide cavity has an antenna hole on its surface. The output antenna of the magnetron is inserted into the waveguide cavity through the antenna hole. The part of the output antenna of the magnetron that extends into the waveguide cavity is surrounded by antenna sealant. Furthermore, the waveguide cavity from the output antenna to the end of the waveguide cavity, i.e. the opposite end of the waveguide cavity outlet, is filled with antenna sealant.

[0008] The magnetron is also equipped with a water jacket, and the outside of the water jacket is equipped with a water jacket circulation inlet and a water jacket circulation outlet. Both the water jacket circulation inlet and the water jacket circulation outlet are connected to the power supply circulation cooling module.

[0009] The power circulation cooling module also contains a microwave power board. The surface of the power circulation cooling module is equipped with wiring terminals, and the outside of the filter cavity is equipped with a power inlet hole. The inductor coil is connected to the microwave power board through the power inlet hole and the wiring terminals.

[0010] The magnetron includes an upper magnet and a lower magnet, and both the upper and lower magnets are sealed with adhesive on their outer sides.

[0011] The filter cavity is also connected to a first temperature sensor, and the detection end of the first temperature sensor is inserted into the filter cavity.

[0012] The first temperature sensor is connected to the filter cavity with a first explosion-proof gland, and the power inlet is connected to a second explosion-proof gland.

[0013] The power circulation cooling module includes a coolant tank and its internal circulation pump and second temperature sensor. The outlet of the circulation pump is connected to the inlet of the water jacket circulation via a pipe, and the outlet of the water jacket circulation is connected to the coolant tank via a pipe. Both the circulation pump and the second temperature sensor are connected to external devices via wiring terminals.

[0014] A condenser is also connected to the pipe between the water jacket circulation outlet and the coolant tank.

[0015] The coolant tank casing is also connected to a level switch and a pressure relief valve.

[0016] The point where the water jacket circulation outlet is connected to the coolant tank via a pipe is higher than the point where the water jacket circulation inlet is connected to the coolant tank.

[0017] It also includes an explosion-proof control box, inside which the coolant tank is placed.

[0018] Low-temperature variable pressure oil is used as the coolant.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. A water-cooled magnetron is selected, while the microwave power supply uses an oil-immersion cooling method. Low-temperature transformer oil is used as the coolant. The transformer oil serves as both the coolant for the microwave power supply and the coolant for the water jacket of the water-cooled magnetron, achieving a dual function.

[0021] 2. The waveguide and magnetron frame are designed as a single unit to serve as a protective cover for the magnetron. The LC oscillation circuit in the exposed part of the electronic circuit in the filter box (i.e., the filter cavity) and the microwave transmitting probe inserted into the waveguide cavity are sealed and filled with heat-dissipating silicone with low dielectric constant and high temperature resistance, so as to isolate the heat-generating electronic components from the oil and gas in the closed space of the filter box. Attached Figure Description

[0022] Figure 1 A schematic diagram of an explosion-proof microwave source magnetron waveguide integrated device.

[0023] In the diagram: 1. Waveguide cavity; 2. Antenna sealant; 3. Lower magnet; 4. Water jacket; 5. Upper magnet; 6. First temperature sensor; 61. First explosion-proof gland; 7. Sealant; 8. Filter cavity; 9. Power inlet; 91. Second explosion-proof gland; 10. Water jacket circulation inlet; 11. Water jacket circulation outlet; 12. Condenser; 13. Circulation pump; 14. Microwave power board; 15. Liquid level switch; 16. Pressure relief valve; 17. Terminal block; 18. Second temperature sensor; 19. Coolant tank; 20. Explosion-proof control box; 21. Inductor coil; 22. Antenna hole; 23. Magnetron; 24. Antenna.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0025] like Figure 1 As shown, an explosion-proof microwave source magnetron waveguide integrated device includes a waveguide cavity 1, a magnetron, a filter cavity 8, and a power supply circulation cooling module.

[0026] An inductor coil 21 is installed inside the filter cavity 8, and the rest of the filter cavity 8 is filled with sealant 7. The filter cavity 8 is connected to the magnetron 23, and the inductor coil 21 is connected to the input terminal of the magnetron 23.

[0027] Magnetron 23 is connected to waveguide cavity 1. An antenna hole 22 is formed on the surface of waveguide cavity 1. The output antenna 24 of magnetron 23 is inserted into waveguide cavity 1 through the antenna hole 22. Antenna sealant 2 is provided around the portion of the output antenna 24 that extends into waveguide cavity 1. Furthermore, from the output antenna 24 to the end of waveguide cavity 1 (i.e., the outlet end of waveguide cavity 1),... Figure 1 The lower end of the waveguide cavity 1 is filled with antenna sealant 2 on the opposite side; the antenna sealant 2 completely immerses the output antenna 24 of the magnetron 23. After the sealant is cured, the output antenna 24 of the magnetron 23 and the waveguide cavity 1 form a complete, seamless, and crack-free whole.

[0028] A water jacket 4 is also provided inside the magnetron 23. A water jacket circulation inlet 10 and a water jacket circulation outlet 11 are provided on the outside of the water jacket 4. Both the water jacket circulation inlet 10 and the water jacket circulation outlet 11 are connected to the power supply circulation cooling module.

[0029] The power circulation cooling module also includes a microwave power board 14. The surface of the power circulation cooling module is provided with wiring terminals 17. The outside of the filter cavity 8 is provided with a power inlet hole 9. The inductor coil 21 is connected to the microwave power board 14 through the power inlet hole 9 and the wiring terminals 17.

[0030] The waveguide cavity 1 and the magnetron 23 are designed as a complete protective shield. The antenna 24 of the magnetron 23 is inserted into the waveguide cavity 1 and sealed completely with a low dielectric constant, high-temperature resistant heat-dissipating silicone as antenna sealant 2. The exposed part of the inductor coil 21 in the filter cavity 8 is completely filled with sealant 7, that is, the entire filter cavity 8 is filled. The waveguide cavity 1 and the antenna 24 of the magnetron 23 form a sealed space, and the filter cavity 8 is also a sealed space. The antenna 24 and the inductor coil 21 of the magnetron 23 will generate heat when working. The purpose of sealing is to seal the space, so as to isolate it from the oil and gas in the environment and prevent the oil and gas from igniting with the heating element in the sealed space and causing danger.

[0031] The sealing compound for waveguide cavity 1, i.e., antenna sealing compound 2, specifically includes, as follows: Figure 1 As shown, the area from a certain distance from the bottom of antenna 24 to the top of waveguide cavity 1 is completely filled. Antenna sealant 2 and sealant 7 are both... Figure 1 The black dot part.

[0032] The magnetron 23 is cooled by circulating with the coolant of the power supply cooling module through the water jacket circulation inlet 10 and the water jacket circulation outlet 11.

[0033] The microwave power board 14 in the power circulation cooling module supplies power to the inductor coil 21 through the wiring terminal 17 and the power inlet hole 9.

[0034] The magnetron 23 includes an upper magnet 5 and a lower magnet 3, and both the upper magnet 5 and the lower magnet 3 are provided with sealant 7 on their outer sides.

[0035] The exposed portions of the upper magnet 5 and the lower magnet 3 are also filled with sealant 7.

[0036] Exposed to the outside Figure 1 In the middle, the parts of the upper magnet 5 and the lower magnet 3 exposed inside the magnetron 23 on both the upper and lower sides are wrapped with sealant 7.

[0037] A first temperature sensor 6 is also connected to the filter cavity 8, and the detection end of the first temperature sensor 6 is inserted into the filter cavity 8.

[0038] The first temperature sensor 6 is connected to the filter cavity 8 by a first explosion-proof gland 61, and the power inlet 9 is connected to a second explosion-proof gland 91. The first temperature sensor 6 and the power cord are sealed with adhesive (that is, the inserted first temperature sensor 6 is completely wrapped to prevent oil and gas from entering the filter cavity 8 through the first explosion-proof gland 61) and led out to the explosion-proof control box 20. This is used to detect the temperature inside the filter cavity 8, control the power supply of the magnetron 23, and disconnect the power supply of the magnetron 23 when the alarm temperature is exceeded.

[0039] The power circulation cooling module includes a coolant tank 19 and its internal circulation pump 13 and second temperature sensor 18. The outlet of the circulation pump 13 is connected to the water jacket circulation inlet 10 through a pipe, and the water jacket circulation outlet 11 is connected to the coolant tank 19 through a pipe. The circulation pump 13 and the second temperature sensor 18 are both connected to external devices through terminal blocks 17. The external devices are PLC controllers, which control the circulation pump 13 and the microwave power board 14 [FX1] to start and stop according to the detected temperature, liquid level and pressure.

[0040] A condenser 12 is also connected to the pipe between the water jacket circulation outlet 11 and the coolant tank 19.

[0041] The outer shell of the coolant tank 19 is also connected to a level switch 15 and a pressure relief valve 16.

[0042] The water jacket circulation outlet 11 is connected to the coolant tank 19 via a pipe at a point higher than the point where the water jacket circulation inlet 10 is connected to the coolant tank 19.

[0043] It also includes an explosion-proof control box 20, and a coolant tank 19 is placed inside the explosion-proof control box 20.

[0044] Low-temperature variable pressure oil is used as the coolant.

[0045] The circulation pump 13 uses a submersible pump to circulate the coolant. After the coolant is condensed and cooled, it flows back to the coolant tank 19, completing the complete circulation loop of the coolant. The microwave power board 14 and the circulation pump 13 are placed in the sealed coolant tank 19. The upper part of the coolant tank has a wiring terminal 17 to supply power to the microwave power board 14 and the circulation pump 13, as well as to connect the signal line of the second temperature sensor 18.

[0046] The coolant tank 19 has a level switch 15 at the top for detection; it alarms and disconnects the power when the coolant level is too low. A pressure relief valve 16 is installed at the bottom of the coolant tank 19; it provides pressure relief protection when the internal pressure is too high. A second temperature sensor 18 inside the coolant tank 19 monitors the coolant temperature in real time and triggers an alarm when the temperature exceeds the limit.

Claims

1. An explosion-proof microwave source magnetron waveguide integrated device, characterized in that: It includes a waveguide cavity (1), a magnetron (23), a filter cavity (8), and a power supply cooling module; An inductor coil (21) is installed inside the filter cavity (8), and the rest of the filter cavity (8) is filled with sealant (7). The filter cavity (8) is connected to the magnetron (23), and the inductor coil (21) is connected to the input terminal of the magnetron (23). The magnetron (23) is connected to the waveguide cavity (1). The surface of the waveguide cavity (1) has an antenna hole (22). The output antenna (24) of the magnetron (23) is inserted into the waveguide cavity (1) through the antenna hole (22). The part of the output antenna of the magnetron (23) that extends into the waveguide cavity (1) is surrounded by antenna sealant (2). The part of the waveguide cavity (1) from the output antenna (24) to the end of the waveguide cavity (1), that is, the other end opposite to the outlet end of the waveguide cavity (1), is filled with antenna sealant (2). A water jacket (4) is also provided inside the magnetron (23). A water jacket circulation inlet (10) and a water jacket circulation outlet (11) are provided on the outside of the water jacket (4). Both the water jacket circulation inlet (10) and the water jacket circulation outlet (11) are connected to the power supply circulation cooling module. The power circulation cooling module is also equipped with a microwave power board (14), and the power circulation cooling module is equipped with wiring terminals (17). The filter cavity (8) is equipped with a power inlet hole (9) on the outside. The inductor coil (21) is connected to the microwave power board (14) through the power inlet hole (9) and the wiring terminals (17).

2. The microwave source magnetron waveguide integrated device of claim 1, wherein: The magnetron (23) includes an upper magnet (5) and a lower magnet (3), and both the upper magnet (5) and the lower magnet (3) are covered with sealant (7).

3. The microwave source magnetron waveguide integrated device of claim 1, wherein: The filter cavity (8) is also connected to a first temperature sensor (6), and the detection end of the first temperature sensor (6) is inserted into the filter cavity (8).

4. The microwave source magnetron waveguide integrated device of claim 3, wherein: The first temperature sensor (6) is connected to the filter cavity (8) with a first explosion-proof gland (61) and the power inlet hole (9) is connected to a second explosion-proof gland (91).

5. The microwave source magnetron waveguide integrated device of claim 1, wherein: The power circulation cooling module includes a coolant tank (19) and its internal circulation pump (13) and second temperature sensor (18). The outlet of the circulation pump (13) is connected to the water jacket circulation inlet (10) through a pipe, and the water jacket circulation outlet (11) is connected to the coolant tank (19) through a pipe. The circulation pump (13) and the second temperature sensor (18) are both connected to external devices through wiring terminals (17).

6. The microwave source magnetron waveguide integrated device of claim 5, wherein: The water jacket circulation outlet (11) is connected to a condenser (12) via a pipe between the pipe and the coolant tank (19).

7. The microwave source magnetron waveguide integrated device of claim 5, wherein: The outer shell of the coolant tank (19) is also connected to a level switch (15) and a pressure relief valve (16).

8. The microwave source magnetron waveguide integrated device of claim 5, wherein: The connection point between the water jacket circulation outlet (11) and the coolant tank (19) via a pipe is higher than the connection point between the water jacket circulation inlet (10) and the coolant tank (19).

9. The microwave source magnetron waveguide integrated device of claim 5, wherein: It also includes an explosion-proof control box (20), and a coolant tank (19) is placed inside the explosion-proof control box (20).

10. The microwave source magnetron waveguide integrated device of claim 1 or 5, wherein: Low-temperature variable pressure oil is used as the coolant.

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