A log microwave quarantine inactivation electric field mode stirring device

Abstract

The utility model discloses a log microwave quarantine inactivation electric field mode stirring device, which belongs to the technical field of quarantine inactivation of log pests and diseases, and comprises a driving motor, a non-metallic transmission rod and a metal stirring blade, wherein the driving motor is installed outside the top wall of a microwave chamber through a motor mounting plate, an air supply hole, an air supply device and an air supply cover are provided on the motor mounting plate, a cut-off waveguide tube is fixed on the air supply hole, a mounting hole is provided on the top wall of the microwave chamber, one end of the non-metallic transmission rod is fixedly connected to the output shaft of the driving motor, the other end of the non-metallic transmission rod passes through the cut-off waveguide tube and extends into the microwave chamber, the metal stirring blade is installed on the non-metallic transmission rod, the air supply cover sealing sleeve is arranged on the non-metallic transmission rod, and an air inlet connected with the air supply device is arranged on the side wall of the air supply cover. Air is supplied to the air supply hole through the air supply device and the air supply cover, so that water vapor near the cut-off waveguide tube can be blown away and dispersed, and water vapor is prevented from being discharged from the cut-off waveguide tube and causing a short circuit of the driving motor.

Description

Technical Field

[0001] The utility model relates to the technical field of quarantine and inactivation of log pests and diseases, in particular to an electric field mode stirring device for microwave quarantine and inactivation of log pests and diseases. Background Art

[0002] Logs are one of the most important imported commodities in my country. The large amount of log imports hides the problem of the spread and control of foreign pests brought with the logs, that is, the quarantine treatment problem. In the past, the world's common quarantine treatment method mainly used chemical agent methyl bromide for fumigation, but it has serious environmental pollution problems. For this reason, the International Plant Protection Organization encourages contracting parties to use microwave dielectric heating to replace methyl bromide fumigation in wood quarantine treatment. The mechanism of microwave insecticide is still inconclusive. It is generally believed that there are several major effects: 1) thermal effect; 2) non-thermal effect; 3) comprehensive effect. Microwave insecticide is mainly based on thermal effect, supplemented by non-thermal effect, and is the result of the joint action of multiple effects.

[0003] The microwave processing system for logs is mainly divided into a sealed cabin processing system and a microwave tunnel processing system. The microwave is supplied into the microwave chamber of the sealed cabin or microwave tunnel through the microwave irradiation antenna feed system, and then the logs in the microwave chamber can be treated with microwave insecticide. In order to ensure the uniformity of microwave radiation in the microwave chamber, a stirring device is currently installed in the microwave chamber. The stirring device mainly includes a motor, a non-metallic transmission rod and a metal blade. The motor is installed outside the microwave chamber, and the non-metallic stirring rod is extended into the microwave chamber to drive the metal blade to rotate periodically, so that the electromagnetic field mode in the microwave chamber is disturbed and periodically changed, and the alternation of peaks and troughs is achieved to achieve uniform radiation. When microwaves are used to heat and kill insects on logs, the water in the logs will evaporate, forming a large amount of water vapor in the microwave chamber. Although the microwave chamber has equipment to discharge water vapor, some water vapor may still be discharged from the gap between the non-metallic transmission rod and the transmission rod installation hole on the top wall of the microwave chamber, which will cause the motor driving the non-metallic transmission rod to short-circuit. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned technical problems and provide a log microwave quarantine inactivation electric field mode stirring device, which can blow away and disperse the water vapor near the cutoff waveguide under the action of air supply equipment and air supply hood to the air supply hole, so as to avoid the water vapor being discharged from the cutoff waveguide to the drive motor and causing a short circuit of the drive motor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme: The utility model discloses a log microwave quarantine inactivation electric field mode stirring device, comprising a driving motor, a non-metallic transmission rod and a metal stirring blade, wherein the driving motor is installed on the outer side of the top wall of the microwave chamber through a motor mounting plate, the motor mounting plate is provided with an air supply hole, an air supply device and an air supply cover in which the air supply hole cover is arranged, the air supply hole is coaxially fixedly connected with a cutoff waveguide tube, the top wall of the microwave chamber is provided with a mounting hole for sealing and inserting the cutoff waveguide tube, one end of the non-metallic transmission rod is fixedly connected to the output shaft of the driving motor, the other end of the non-metallic transmission rod passes through the cutoff waveguide tube and extends into the microwave chamber, the metal stirring blade is installed at one end of the non-metallic transmission rod extending into the microwave chamber, the air supply cover sealing sleeve is arranged on the non-metallic transmission rod, and the side wall of the air supply cover is provided with an air inlet connected to the air supply device.

[0006] Preferably, it comprises an air distribution hood, which is located inside the air supply hood and covers the outside of the air supply hole, the air distribution hood sealing sleeve is arranged on the non-metallic transmission rod, and the side wall of the air distribution hood is covered with ventilation holes.

[0007] Preferably, the air supply device is a blower.

[0008] Preferably, the non-metallic transmission rod is a plastic transmission rod, and an annular heat insulation layer is embedded in the plastic transmission rod.

[0009] Preferably, the annular thermal insulation layer is an alumina ceramic layer.

[0010] Preferably, a stirring blade mounting frame is provided on the non-metallic transmission rod, and a plurality of non-metallic stirring rods are rotatably connected to the stirring blade mounting frame. The plurality of non-metallic stirring rods surround the non-metallic transmission rod, and a driving gear is provided on the non-metallic transmission rod. A driven gear meshing with the driving gear is provided on the non-metallic stirring rod, and the metal stirring blade is mounted on the non-metallic stirring rod.

[0011] Preferably, the non-metallic stirring rod, the non-metallic transmission rod and the stirring blade mounting frame are connected via a bearing.

[0012] Preferably, the metal stirring blade includes two stirring blades, the stirring blades have an angle of 45 degrees with the horizontal direction, and the length of the stirring blades is The angle between the two stirring blades is 90 degrees, and λ is the wavelength of air.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] In the electric field mode stirring device of the utility model, when the driving motor is started and the metal stirring blades stir the microwaves, the air supply device supplies air into the air supply cover through the air inlet, and the wind flows into the cutoff waveguide through the gap between the air supply hole and the non-metallic transmission rod, and then is sent into the microwave chamber by the cutoff waveguide, blowing away and dispersing the water vapor near the cutoff waveguide, preventing the water vapor from being discharged from the cutoff waveguide to flow to the driving motor and causing a short circuit in the driving motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of an electric field mode stirring device;

[0017] Figure 2 is a cross-sectional view of an electric field mode stirring device;

[0018] Figure 3 for Figure 2 A partial enlarged view of

[0019] Figure 4 is a cross-sectional view of the non-metallic transmission rod parallel to the axial direction;

[0020] Figure 5 is a cross-sectional view of the non-metallic transmission rod perpendicular to the axial direction;

[0021] Figure 6 It is a schematic diagram of the structure of the electric field mode stirring device (with a non-metallic stirring rod);

[0022] Figure 7 A top view of the stirring blade mounting bracket.

[0023] Explanation of the accompanying drawings: 1. driving motor; 2. non-metallic transmission rod; 3. metal stirring blade; 4. motor mounting plate; 5. air supply equipment; 6. air supply hood; 7. air distribution hood; 8. cut-off waveguide tube; 9. motor mounting frame; 10. air supply hole; 11. air inlet; 12. air vent; 13. annular insulation layer; 14. stirring blade mounting frame; 15. non-metallic stirring rod; 16. driving gear; 17. driven gear; 18. bearing; 19. top wall. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] This embodiment provides a log microwave quarantine inactivation electric field mode stirring device, such as Figures 1 to 7 As shown, it includes a driving motor 1, a non-metallic transmission rod 2 and a metal stirring blade 3. The driving motor 1 is installed on the outside of the top wall 19 of the microwave chamber through a motor mounting plate 4, and the microwave chamber can be a sealed microwave cabin or a microwave tunnel. The motor mounting plate 4 can be connected to the top wall 19 of the microwave chamber by bolts. The motor mounting plate 4 is provided with an air supply hole 10, an air supply device 5 and an air supply cover 6. The air supply hole 10 is coaxially fixedly connected with a cutoff waveguide 8, and a mounting hole is provided on the top wall 19 of the microwave chamber, and the cutoff waveguide 8 is sealed and inserted in the mounting hole. One end of the non-metallic transmission rod 2 is fixedly connected to the output shaft of the driving motor 1, and the other end of the non-metallic transmission rod 2 passes through the cutoff waveguide 8 and extends into the microwave chamber. The air supply cover 6 sealing sleeve is arranged on the non-metallic transmission rod 2, and the air supply hole 10 is covered therein, and an air inlet 11 is provided on the side wall of the air supply cover 6, and the air inlet 11 is connected to the air supply device 5. The metal stirring blade 3 is installed at one end of the non-metallic transmission rod 2 extending into the microwave chamber.

[0026] Working principle:

[0027] The driving motor 1 and the air supply device 5 are started to drive the non-metallic transmission rod 2 to rotate periodically, and then drive the metal stirring blade 3 in the microwave chamber to rotate periodically, disturbing the microwaves in the microwave chamber, so that the electromagnetic field mode in the microwave chamber is disturbed and periodically changed, realizing the alternation of wave crests and troughs to achieve uniform radiation, and the cutoff waveguide 8 can prevent the microwaves in the microwave chamber from leaking out. The air supply device 5 supplies air to the air supply cover 6 through the air inlet 11, and the air flows into the cutoff waveguide 8 through the gap between the air supply hole 10 and the non-metallic transmission rod 2, and then is sent into the microwave chamber by the cutoff waveguide 8, blowing away the nearby water vapor, and preventing the water vapor from being discharged from the cutoff waveguide 8 to the driving motor 1, causing the driving motor 1 to short-circuit.

[0028] In this embodiment, Figures 1 to 7 As shown, a motor mounting frame 9 is provided on the motor mounting plate 4 , and the driving motor 1 is mounted on the motor mounting frame 9 .

[0029] In this embodiment, Figures 1 to 7As shown, the electric field mode stirring device also includes an air distribution hood 7, which is located inside the air supply hood 6, and the air distribution hood 7 is arranged outside the air supply hole 10. The air distribution hood 7 sealing sleeve is arranged on the non-metallic transmission rod 2, and the side wall of the air distribution hood 7 is covered with ventilation holes 12. The wind first enters the air supply hood 6 through the air supply hole 10, and then enters the air distribution hood 7 through the ventilation holes 12. The path of the wind entering the air supply hood 6 through the air supply hole 10 can be combed, so that the wind enters the air distribution hood 7 evenly, and then is sent into the microwave chamber through the air supply hole 10. Preferably, the air distribution hood 7, the air supply hood 6 and the air supply hole 10 are coaxially arranged.

[0030] In this embodiment, Figures 1 to 7 As shown, the air supply device 5 is a blower.

[0031] In this embodiment, Figures 1 to 7 As shown, the non-metallic transmission rod 2 is a plastic transmission rod, and an annular heat-insulating layer 13 is embedded in the plastic transmission rod. The non-metallic transmission rod 2 adopts a plastic transmission rod, which has a simple manufacturing process and low manufacturing cost. However, although the plastic transmission rod will not be heated by microwaves, microwaves will generate high temperatures when heating the logs in the microwave chamber, causing the temperature in the microwave chamber to also increase. In order to prevent the plastic transmission rod from bending in a high-temperature environment for a long time, an annular heat-insulating layer 13 is embedded in the plastic transmission rod, which wraps most of the rod body of the plastic transmission rod, isolates heat transfer, and reduces the degree and risk of high-temperature deformation.

[0032] Further, in this embodiment, if Figures 1 to 7 As shown, the annular heat insulation layer 13 is an alumina ceramic layer. The alumina ceramic layer is resistant to high temperatures and has a hard texture. While providing heat insulation, it also supports the non-metallic transmission rod 2, ensuring the straightness of the rod and reducing the total deformation.

[0033] Further, in this embodiment, if Figures 1 to 7 As shown, a stirring blade mounting frame 14 is provided on the non-metallic transmission rod 2, and a plurality of non-metallic stirring rods 15 are rotatably connected to the stirring blade mounting frame 14, and the plurality of non-metallic stirring rods 15 surround the non-metallic transmission rod 2. A driving gear 16 is provided on the non-metallic transmission rod 2, and a driven gear 17 is provided on the non-metallic stirring rod 15, and the driven gear 17 is meshed with the driving gear 16. Metal stirring blades 3 are installed on each non-metallic stirring rod 15. The driving motor 1 drives the non-metallic transmission rod 2 to rotate, and under the meshing action of the driven gear 17 and the driving gear 16, a plurality of non-metallic stirring rods 15 will rotate at the same time, driving their respective metal stirring blades 3 to rotate, so as to achieve the purpose of rotating multiple rods with one machine, thereby increasing the stirring range and saving the setting cost of the driving motor 1.

[0034] Further, in this embodiment, if Figures 1 to 7 As shown, the non-metallic stirring rod 15 , the non-metallic transmission rod 2 and the stirring blade mounting frame 14 are connected via a bearing 18 .

[0035] In this embodiment, Figures 1 to 7 As shown, there are three non-metallic stirring rods 15, which are arranged in an equilateral triangle, and the non-metallic transmission rod 2 is located at the center of the equilateral triangle.

[0036] In this embodiment, Figures 1 to 7 As shown, the metal stirring blade 3 includes two stirring blades, and the angle between the stirring blades and the horizontal direction is 45 degrees. In practical applications, the best stirring effect can be achieved in both horizontal and vertical directions. The length of the stirring blade is The angle between the two stirring blades is 90 degrees, and λ is the wavelength of air. The blade thickness is greater than or equal to 4mm to ensure that it has a high structural strength.

[0037] Further, in this embodiment, if Figures 1 to 7 As shown, the metal stirring blade 3 is injection molded, using ABS plastic, and the outer layer is electroplated with copper and chromium, and the copper plating thickness is greater than 30 μm to ensure that the metal stirring blade 3 has good conductive properties.

[0038] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A log microwave quarantine inactivation electric field mode stirring device, characterized in that: It includes a driving motor, a non-metallic transmission rod and a metal stirring blade. The driving motor is installed on the outer side of the top wall of the microwave chamber through a motor mounting plate. The motor mounting plate is provided with an air supply hole, an air supply device and an air supply cover in which the air supply hole cover is arranged. A cutoff waveguide is coaxially fixedly connected to the air supply hole. A mounting hole for sealing and inserting the cutoff waveguide is provided on the top wall of the microwave chamber. One end of the non-metallic transmission rod is fixedly connected to the output shaft of the driving motor, and the other end of the non-metallic transmission rod passes through the cutoff waveguide and extends into the microwave chamber. The metal stirring blade is installed at one end of the non-metallic transmission rod extending into the microwave chamber. The air supply cover sealing sleeve is arranged on the non-metallic transmission rod. An air inlet connected to the air supply device is provided on the side wall of the air supply cover.

2. A log microwave quarantine inactivation electric field mode stirring device according to claim 1, characterized in that: It comprises an air distribution hood, which is located inside the air supply hood and covers the outside of the air supply hole. The air distribution hood sealing sleeve is arranged on the non-metallic transmission rod, and the side wall of the air distribution hood is covered with ventilation holes.

3. The electric field mode stirring device for microwave quarantine and inactivation of logs according to claim 1, characterized in that: The air supply device is a blower.

4. The electric field mode stirring device for microwave quarantine and inactivation of logs according to claim 1, characterized in that: The non-metallic transmission rod is a plastic transmission rod, and an annular heat insulation layer is embedded in the plastic transmission rod.

5. A log microwave quarantine inactivation electric field mode stirring device according to claim 4, characterized in that: The annular heat insulation layer is an aluminum oxide ceramic layer.

6. The electric field mode stirring device for microwave quarantine and inactivation of logs according to claim 1, characterized in that: The non-metallic transmission rod is provided with a stirring blade mounting frame, and a plurality of non-metallic stirring rods are rotatably connected to the stirring blade mounting frame. The plurality of non-metallic stirring rods surround the non-metallic transmission rod, and the non-metallic transmission rod is provided with a driving gear. The non-metallic stirring rod is provided with a driven gear meshing with the driving gear, and the metal stirring blade is mounted on the non-metallic stirring rod.

7. The electric field mode stirring device for microwave quarantine and inactivation of logs according to claim 6, characterized in that: The non-metallic stirring rod, the non-metallic transmission rod and the stirring blade mounting frame are connected via bearings.

8. The electric field mode stirring device for microwave quarantine and inactivation of logs according to claim 1, characterized in that: The metal stirring blades include two stirring blades, the angle between the stirring blades and the horizontal direction is 45 degrees, and the length of the stirring blades is The angle between the two stirring blades is 90 degrees, and λ is the wavelength of air.

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