Rod-shaped foundation microwave heating device

Abstract

The invention provides a rod-shaped foundation microwave heating device, which adopts a plurality of magnetrons to be converged into a waveguide tube through a multi-channel waveguide tube, so that energy superposition is realized; the waveguide tube adopts a spiral structure, and a plurality of transverse waveguide tubes are arranged on two opposite sides of the spiral waveguide tube from top to bottom, so that a plurality of transverse microwave transmitting ends are formed on one device from top to bottom; moreover, the screw pitch of the spiral waveguide tube is gradually reduced from top to bottom, so that the arrangement distance of the transmitting antennas is gradually reduced from top to bottom, microwave energy at the bottom of the microwave heating device is concentrated, energy weakening when the microwave energy is transmitted to the bottom of the spiral waveguide tube is avoided, and the heating effect on the deep frozen soil can be effectively improved. In addition, a transmitting antenna rotation driving assembly is arranged, so that the transmitting antenna can be driven to rotate, the large microwave irradiation range is ensured, and the large energy density during irradiation can be ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of foundation heating, and particularly relates to a rod-shaped foundation microwave heating device. BACKGROUND

[0002] In cold regions, especially in winter, the foundation will freeze due to too low temperature, form frozen soil, and the continuous negative temperature will gradually increase the frozen depth of the soil body, so that the soil body will have frost heaving effect, which will cause uneven uplift deformation of the foundation, thereby causing damage to the structure of the structure and building (such as water channel body, pipeline, etc.) on the foundation, and cause cracking, deformation, displacement and even collapse of the structure and building, which seriously affects the service life. Therefore, the heating of the foundation soil can be used to effectively prevent the frost heaving effect of the soil body and the damage to the structure of the structure and building on the foundation. In addition, in addition to the heating demand of the frozen soil, other technical scenarios also face the technical demand of heating the foundation soil.

[0003] The existing foundation heating technology usually adopts the electric heating (electric heating rod) heating mode, which has the problems of large energy consumption and limited heat transfer range. SUMMARY

[0004] The application aims to solve the problems of the prior art, and provides a rod-shaped foundation microwave heating device.

[0005] The application is implemented by the following technical scheme:

[0006] A rod-shaped ground-based microwave heating device comprises a rod tube body, inside of which are arranged a mounting frame, a control circuit board, a plurality of magnetrons, a multi-channel waveguide tube, a collecting waveguide tube, a spiral waveguide tube, a transverse waveguide tube, a transmitting antenna, and a transmitting antenna rotation drive assembly, wherein the number of magnetrons is consistent with the number of channel waveguide tubes and is connected one-to-one, the bottom outlets of all channel waveguide tubes are collectively connected to the collecting waveguide tube, and the collecting waveguide tube is connected to the spiral waveguide tube; the mounting frame comprises a top plate and two symmetrically arranged vertical side plates fixedly connected to the bottom of the top plate, the collecting waveguide tube vertically passes through the center of the top plate, the two vertical side plates are symmetrically located on both sides of the spiral waveguide tube, and a transverse waveguide tube is arranged at the intersection of the spiral waveguide tube and the vertical side plates. The inner port of the conduit is fixedly and sealedly connected to the spiral waveguide, and a transmitting antenna is positioned at the outer port of the transverse waveguide. Correspondingly, a through-hole is formed in the wall of the rod tube, corresponding to the position of each transmitting antenna, and a glass cover is installed on the outer side of the through-hole. The transmitting antenna rotation drive assembly includes a drive motor, a transmission rod, a rotating sleeve, and a turbine and worm assembly. The drive motor is mounted on the top plate of the mounting frame. The transmission rod is vertically arranged, the top end of the transmission rod connected to the drive motor. The rotating sleeve is sleeved on the transverse waveguide, the end of the rotating sleeve is fixedly connected to the transmitting antenna, and the rotating sleeve is also mounted in a mounting hole in the vertical side plate via a bearing. A turbine is fixedly mounted on the outer wall of the rotating sleeve. A worm is correspondingly provided on the transmission rod, and the worm engages with the turbine. When the drive motor drives the transmission rod to rotate, the transmission rod drives the turbine via the worm, the turbine drives the rotating sleeve, and the rotating sleeve drives the transmitting antenna.

[0007] In the above technical solution, the transmitting antenna includes a rectangular box body, the inner side of the rectangular box body is provided with a through hole for connecting with the transverse waveguide tube, the outer side of the rectangular box body is open, and a pair of eight-shaped guide plates that gradually expand from the inside to the outside are provided in the rectangular box body.

[0008] In the above technical solution, rollers are provided on the top and bottom surfaces of the rectangular box body of the transmitting antenna in the longitudinal direction, so that the rectangular box body forms rolling contact with the hole wall of the through hole of the rod tube body, thereby increasing the stability and smoothness of the rectangular box body during rotation.

[0009] In the above technical solution, heat dissipation fins are provided on the tube wall of the rod tube body in the installation area corresponding to the control circuit board and the magnetron, so as to enhance the heat dissipation effect of the area.

[0010] In the above technical solution, the number of magnetrons is preferably 3, which are evenly arranged along the circumference on the bottom surface of the control circuit board. The number of channel waveguides is 3, and the top inlets of the 3 channel waveguides are connected to the 3 magnetrons one by one.

[0011] In the above technical scheme, the inner port of the transverse waveguide is provided with a horn-shaped reflecting disc opposite to the inner wall of the spiral waveguide, which is used for making the microwave in the spiral waveguide emit into the transverse waveguide.

[0012] In the above technical scheme, the pitch of the spiral waveguide gradually decreases from top to bottom, and meanwhile the arrangement interval of the emission antennas gradually decreases from top to bottom, so that the microwave energy is concentrated at the bottom of the microwave heating device, the energy is not weakened when the microwave energy is transmitted to the bottom of the spiral waveguide, and the heating effect on the deep frozen soil can be effectively improved.

[0013] In the above technical scheme, the opening of the splayed guide plate of each emission antenna of the microwave heating device gradually decreases from top to bottom, that is, the opening of the splayed guide plate of the emission antenna gradually decreases with the increase of the depth of the soil body, the microwave irradiation range is reduced, and the deep heating efficiency is improved.

[0014] In the above technical scheme, the rod tube body is further provided with a temperature sensor for detecting the temperature of the soil body, and the detection signal of the temperature sensor is transmitted to the control circuit on the control circuit board; the control circuit controls the magnetron to start and emit microwaves according to the detection data of the temperature sensor. The temperature feedback control mechanism can realize automatic adjustment of the frozen soil heating process, and ensure the heating efficiency and temperature control precision.

[0015] The advantages and beneficial effects of the present application are as follows:

[0016] The rod-shaped foundation microwave heating device of the present application adopts the microwave heating mode to heat the soil body, and compared with the electric heating mode, the energy consumption is low and the heating range is large.

[0017] The rod-shaped foundation microwave heating device of the present application adopts multiple magnetrons, and the microwaves emitted by the multiple magnetrons are collected into a waveguide tube through multiple channel waveguide tubes to realize energy superposition; the waveguide tube adopts a spiral structure, and multiple transverse waveguide tubes are arranged from top to bottom on the opposite sides of the spiral waveguide tube, so that multiple transverse microwave emission ends from top to bottom are formed on the microwave heating device, enabling the microwave heating device to fully emit microwaves in a large range into the soil body. Further, the pitch of the spiral waveguide tube gradually decreases from top to bottom, so that the arrangement spacing of the emission antennas gradually decreases from top to bottom, which enables the microwave energy at the bottom of the microwave heating device to be concentrated, avoids weakening of the microwave energy when it is transmitted to the bottom of the spiral waveguide tube, and effectively improves the heating effect on deep permafrost. In addition, the opening of the eight-shaped guide plate of each emission antenna of the microwave heating device gradually decreases from top to bottom, that is, the opening of the eight-shaped guide plate of the emission antenna gradually decreases as the depth of the soil body increases, so that the microwave irradiation range decreases, the deep soil obtains higher energy density, and the deep heating efficiency is improved.

[0018] The rod-shaped foundation microwave heating device of the present application is further provided with an emission antenna rotating driving assembly, which can realize driving rotation of the emission antenna, thereby ensuring a larger microwave irradiation range and a larger energy density during irradiation.

[0019] The rod-shaped foundation microwave heating device of the present application is further provided with a temperature sensor for detecting the temperature of the soil body, and the detection signal of the temperature sensor is transmitted to the control circuit on the control circuit board. The control circuit controls the start of the magnetron according to the detection data of the temperature sensor to emit microwaves. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an external structure diagram of the rod-shaped foundation microwave heating device.

[0021] Figure 2 It is an internal structure diagram of the rod-shaped foundation microwave heating device.

[0022] Figure 3 It is a partial structure diagram of the rod-shaped foundation microwave heating device.

[0023] Figure 4 It is a partial structure diagram of the rod-shaped foundation microwave heating device.

[0024] Figure 5 It is a partial sectional view of the rod-shaped foundation microwave heating device.

[0025] Figure 6The figure is a schematic diagram of the microwave irradiation orthographic shape of the transmitting antenna of the rod-shaped foundation microwave heating device in the rotating and non-rotating working modes.

[0026] For those skilled in the art, other related figures can be obtained according to the above figures without creative labor. DETAILED DESCRIPTION

[0027] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme of the present application will be further described below in combination with specific embodiments.

[0028] The embodiment provides a rod-shaped foundation microwave heating device, which is inserted into the foundation during use, and is used for microwave heating of the foundation soil body, so that the temperature of the soil body is raised, and frost heaving of the soil body can be prevented.

[0029] Referring to the accompanying Figure 1 - the accompanying Figure 5The rod-shaped foundation microwave heating device comprises a rod tube body 11, a mounting frame 101, a control circuit board 102, a plurality of magnetrons 103, a plurality of channel waveguide tubes 104, a collection waveguide tube 105, a spiral waveguide tube 106, a transverse waveguide tube 107, a transmitting antenna 108 and a transmitting antenna rotating driving assembly are arranged in the interior of the rod tube body 11, wherein the control circuit board 102 is fixed in the rod tube body 11 through a support, the control circuit board 102 is provided with a control circuit and key components such as a transformer, a high-voltage capacitor and a diode, which are prior art and will not be described here; the number of the magnetrons 103 is preferably three, which are uniformly arranged on the bottom surface of the control circuit board 102 along the circumference, the number of the channel waveguide tubes 104 is three, the top inlets of the three channel waveguide tubes 104 are connected to the three magnetrons 103 one by one in correspondence, the bottom outlets of the three channel waveguide tubes 104 are connected to the collection waveguide tube 105 in a collective manner, and the collection waveguide tube 105 is connected to the spiral waveguide tube 106; the mounting frame 101 comprises a top plate 1011 and two vertically arranged symmetrical vertical side plates 1012 fixedly connected below the top plate, the collection waveguide tube 105 vertically penetrates the center position of the top plate 1011, the two vertical side plates 1012 are symmetrically arranged on the two sides of the spiral waveguide tube 106, the transverse waveguide tube 107 is arranged at the position where the spiral waveguide tube 106 intersects with the vertical side plate 1012, the inner port of the transverse waveguide tube 107 is fixedly and sealingly communicated with the spiral waveguide tube 106, and the outer port of the transverse waveguide tube 107 is provided with the transmitting antenna 108; correspondingly, a through hole 111 is formed on the pipe wall of the rod tube body 11 corresponding to the position of each transmitting antenna 108, and a glass cover 112 is mounted on the outer side of the through hole 111, so that the glass cover 112 prevents the external soil from entering the interior of the rod tube body 11. During work, the microwaves emitted by the three magnetrons 103 are collected to the collection waveguide tube 105 through the three channel waveguide tubes 104, energy superposition is realized, then the microwaves are transmitted to the spiral waveguide tube 106 through the collection waveguide tube 105, and then the microwaves are emitted outward through the glass cover 112 on the pipe wall of the rod tube body 11 through the transmitting antenna 108 and the multiple transverse waveguide tubes 107 on the two sides of the spiral waveguide tube 106, so that the frozen soil is subjected to microwave heating.

[0030] Specifically, the transmitting antenna 108 comprises a rectangular box body 1081, the inner side (i.e. the side facing the spiral waveguide tube 106) of the rectangular box body 1081 is provided with a through hole for communication with the transverse waveguide tube 107, the outer side (i.e. the side facing the soil) of the rectangular box body 1081 is open, and a pair of eight-shaped guide plates 1082 gradually expanding from the inner side to the outer side are arranged in the rectangular box body 1081, so that the microwaves are diffused outward through the eight-shaped guide plates 1082 and the rectangular box body 1081.

[0031] The transmitting antenna rotation drive assembly includes a drive motor 1091, a transmission rod 1092, a rotating sleeve 1093, a turbine 1094 and a worm 1095 assembly. The drive motor 1091 is installed on the top plate 1011 of the mounting frame 101. The transmission rod 1092 is vertically arranged and located on the side of the vertical side plate 1012. The top of the transmission rod 1092 is connected to the drive motor 1091, and the drive motor 1091 drives the transmission rod 1092 to rotate; the rotating sleeve 1093 is sleeved on the horizontal On the lateral waveguide 107, a rotating sleeve 1093 is rotatable. The end of the rotating sleeve 1093 is fixedly connected to the transmitting antenna 108. The rotating sleeve 1093 is also mounted in a mounting hole in the vertical side plate 1012 via a bearing 1096, enhancing the stability of the rotating sleeve 1093. A turbine 1094 is fixedly mounted on the outer wall of the rotating sleeve 1093. Correspondingly, a worm 1095 is provided on the transmission rod 1092, meshing with the turbine 1094. When the drive motor 1091 rotates the transmission rod 1092, the transmission rod 1092, via the worm 1095, drives the turbine 1094 to rotate. The turbine 1094 then drives the rotating sleeve 1093 to rotate, which in turn drives the transmitting antenna 108 to rotate, thereby expanding the microwave irradiation range. Specifically, in the absence of a transmitting antenna rotation drive assembly, the irradiation angle and range of the microwaves emitted by the transmitting antenna 108 are fixed, and the irradiation shape of the microwaves emitted by the transmitting antenna 108 is approximately rectangular (see the attached diagram). Figure 6 ); and in the case of a transmitting antenna rotation drive assembly, the transmitting antenna 108 rotates so that the irradiation projection shape of the transmitted microwave forms a circle (see attached Figure 6 ), thereby expanding the microwave irradiation range. Furthermore, it should be noted that if transmitting antenna 108 is designed in a circular trumpet shape, while the projected shape of the transmitted microwaves can also be circular, this approach directly expands the microwave irradiation range, reducing the microwave energy density. Consequently, while the irradiation range is large, the heating effect within the range is insufficient, and the distance microwaves penetrate the soil is reduced. The present invention, however, utilizes a design in which transmitting antenna 108 rotates, ensuring both a large microwave irradiation range and a high energy density during irradiation.

[0032] Furthermore, rollers 1083 are provided on the top and bottom surfaces of the rectangular box body 1081 in the longitudinal direction of the transmitting antenna 108, so that the rectangular box body 1081 forms rolling contact with the hole wall of the through hole 111 of the rod tube body 11, thereby increasing the stability and smoothness of the rectangular box body 1081 during rotation.

[0033] Furthermore, heat dissipation fins 12 are provided on the tube wall of the rod tube body 11 in the installation area corresponding to the control circuit board 102 and the magnetron 103 to enhance the heat dissipation effect in this area.

[0034] Further, a horn-shaped reflecting disc 1061 (see Fig. 6) is arranged at the inner wall of the spiral waveguide 106 opposite to the inner port of the transverse waveguide 107, for making the microwave in the spiral waveguide 106 emit into the transverse waveguide 107. Figure 4

[0035] Further, the pitch of the spiral waveguide 106 is gradually reduced from top to bottom, and the arrangement interval of the emission antennas 108 is gradually reduced from top to bottom, so that the microwave energy is concentrated at the bottom of the microwave heating device 1, and the energy is not weakened when the microwave energy is transmitted to the bottom of the spiral waveguide, which can effectively improve the heating effect on the deep frozen soil.

[0036] Further, the opening of the splayed guide plate 1082 of each emission antenna 108 of the microwave heating device 1 is gradually reduced from top to bottom, that is, as the depth of the soil increases, the opening of the splayed guide plate 1082 of the emission antenna 108 is gradually reduced, so that the range of microwave irradiation is reduced, and the energy density is increased, so as to improve the deep heating efficiency, and the frozen soil can be thawed in a shorter time, and the heating effect on the frozen soil is further improved.

[0037] Further, the rod tube body 11 is also provided with a temperature sensor for detecting the temperature of the soil, and the detection signal of the temperature sensor is transmitted to the control circuit on the control circuit board 102, and the control circuit controls the starting of the magnetron according to the detection data of the temperature sensor to emit microwaves. The temperature feedback control mechanism can realize automatic adjustment of the frozen soil heating process, and ensure the heating efficiency and temperature control precision.

[0038] For ease of description, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to describe the relationship of one element or feature to another element or feature shown in the drawings. It should be understood that, in addition to the orientation shown in the drawings, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the drawings is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Therefore, the exemplary term "below" can include both upward and downward orientations. The device can be positioned in other ways (rotated 90 degrees or positioned in other orientations), and the spatial relative description used herein can be interpreted accordingly.

[0039] Moreover, relational terms such as "first" and "second" and the like are used only to distinguish one component from another component having the same name, and do not necessarily require or imply any such actual relationship or order between the components.

[0040] ​The above has made the exemplary description to the present application, should indicate that, in not departing from the core of the present application, any simple change, modification or other field technicians can not spend the equivalent replacement of creative labor falls into the protection scope of the present application.

Claims

1. A rod foundation microwave heating apparatus characterized by: The application relates to a microwave heating device, which comprises a rod tube body, a mounting frame, a control circuit board, a plurality of magnetrons, a plurality of channel waveguides, a collection waveguide, a spiral waveguide, a transverse waveguide, a transmitting antenna and a transmitting antenna rotating drive assembly which are arranged in the interior of the rod tube body, wherein the number of the magnetrons is consistent with the number of the channel waveguides, the magnetrons and the channel waveguides are connected one by one in correspondence, the bottom outlets of all the channel waveguides are connected to the collection waveguide, and the collection waveguide is connected to the spiral waveguide; the mounting frame comprises a top plate and two symmetrical vertical side plates which are fixedly connected below the top plate, the collection waveguide vertically penetrates the center of the top plate, the two vertical side plates are symmetrically arranged on the two sides of the spiral waveguide, the transverse waveguide is arranged at the position where the spiral waveguide intersects with the vertical side plate, the inner port of the transverse waveguide is fixedly and sealingly communicated with the spiral waveguide, and the transmitting antenna is arranged at the outer port of the transverse waveguide; correspondingly, a through hole is formed on the wall of the rod tube body at the position corresponding to each transmitting antenna, and a glass cover is arranged outside the through hole; the transmitting antenna rotating drive assembly comprises a driving motor, a transmission rod, a rotating sleeve, a turbine and a worm assembly, the driving motor is arranged on the top plate of the mounting frame, the transmission rod is vertically arranged, the top end of the transmission rod is connected with the driving motor, the rotating sleeve is sleeved on the transverse waveguide, the end of the rotating sleeve is fixedly connected with the transmitting antenna, the rotating sleeve is further arranged in the mounting hole of the vertical side plate through a bearing, the turbine is fixedly arranged on the outer wall of the rotating sleeve, and the worm is arranged on the transmission rod in correspondence, and the worm is engaged with the turbine.

2. The in-line microwave heating apparatus of claim 1, wherein: The transmitting antenna comprises a rectangular box body, a through hole for communicating with the transverse waveguide is arranged on the inner side of the rectangular box body, the outer side of the rectangular box body is open, and a pair of eight-shaped guide plates which are gradually expanded from the inner side to the outer side are arranged in the rectangular box body.

3. The in-line microwave heating apparatus of claim 1, wherein: Rollers are arranged on the top surface and the bottom surface of the rectangular box body of the transmitting antenna in the length direction.

4. The in-line microwave heating apparatus of claim 1, wherein: Heat dissipation fins are arranged on the wall of the rod tube body at the mounting areas of the control circuit board and the magnetrons.

5. The in-line microwave heating apparatus of claim 1, wherein: The number of the magnetrons is three, and the magnetrons are uniformly arranged on the bottom surface of the control circuit board along the circumference; the number of the channel waveguides is three, and the top inlets of the three channel waveguides are connected with the three magnetrons one by one in correspondence.

6. The in-line microwave heating apparatus of claim 1, wherein: A horn-shaped reflecting disc is arranged on the inner wall of the spiral waveguide at the position opposite to the inner port of the transverse waveguide, so as to make the microwave in the spiral waveguide emit into the transverse waveguide.

7. The in-line microwave heating apparatus of claim 1, wherein: The pitch of the spiral waveguide is gradually reduced from top to bottom, and meanwhile, the arrangement spacing of the transmitting antennas is gradually reduced from top to bottom.

8. The rod foundation microwave heating apparatus according to claim 2, characterized by: The opening of the eight-shaped guide plates of each transmitting antenna of the microwave heating device is gradually reduced from top to bottom.

9. The in-line microwave heating apparatus of claim 1, wherein: A temperature sensor is further arranged on the rod tube body, which is used for detecting the temperature of the soil body, and the detection signal of the temperature sensor is transmitted to the control circuit on the control circuit board, and the control circuit controls the starting of the magnetrons and the emission of the microwave according to the detection data of the temperature sensor.

Images