An 80G frequency modulation radar level gauge

Abstract

The present invention belongs to the technical field of frequency-modulated radar level gauges, and relates to an 80G frequency-modulated radar level gauge, which includes a transmission device, a lens antenna, a case, fixing screws, a plug, an electronic unit, and a case cover. The transmission device is arranged inside the lens antenna, the lens antenna is arranged inside the case, the electronic unit is arranged inside the case, the plug and the case cover are arranged on the case. An adjusting device for driving the transmission device to change the focal length is provided on the case, a detection device is provided on the case cover, a cleaning device for cleaning the surface of the lens antenna is provided on the lens antenna, the detection device controls the switch of the cleaning device. By adopting non-contact measurement, the antenna does not contact the medium, which enhances the service life of the product. Then, the focal length of the transmission device is adjusted by the adjusting device to adapt to a certain range of working distances, thereby reducing the blind area. The detection device will control the start or stop of the cleaning device according to the working environment conditions to clean the lower end surface of the lens antenna to avoid affecting the detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of radar level gauges, and particularly relates to an 80G frequency-modulated radar level gauge. Background Art

[0002] In modern industrial production, the production scale is large and the degree of automatic control is high. Especially in complex working conditions such as stirring in tanks, high temperature, large steam, and strong corrosiveness of the medium, the requirements for level detection and automatic control are high. Non-contact measurement is adopted, with high wear resistance and aging resistance, and is not affected by pressure, vacuum or temperature. Therefore, it has excellent performance under harsh measurement conditions such as flammable, explosive, strongly corrosive, high temperature, and viscous, and is especially suitable for the measurement of large vertical tanks and spherical tanks, etc.

[0003] The current level gauges may have blind spots during measurement, and may also cause chain situations due to the special working environment, affecting the measurement error. Summary of the Invention

[0004] The purpose of the present invention is to provide an 80G frequency-modulated radar level gauge to solve the problems of reducing the detection blind spot and improving the detection accuracy.

[0005] To achieve the above purpose, the specific technical solution of an 80G frequency-modulated radar level gauge of the present invention is as follows:

[0006] An 80G frequency-modulated radar level gauge includes a transmission device, a lens antenna, a housing, fixing screws, plugs, an electronic unit, and a cover. The transmission device is arranged inside the lens antenna, the lens antenna is arranged inside the housing, the electronic unit is arranged inside the housing, the plugs and the cover are arranged on the housing. It is characterized in that an adjusting device for driving the transmission device to change the focal length is provided on the housing, a detection device is provided on the cover, a cleaning device for cleaning the surface of the lens antenna is provided on the lens antenna, and the detection device controls the switch of the cleaning device.

[0007] Further, the transmission device includes a mounting shell, a fixed convex lens, a movable convex lens, and an expansion cavity. The mounting shell is arranged inside the lens antenna, the fixed convex lens is arranged inside the mounting shell, the movable convex lens is arranged in the mounting shell and is located below the fixed convex lens. An expansion cavity is formed between the fixed convex lens and the movable convex lens, and the expansion cavity is communicated with the adjusting device. The expansion cavity and the adjusting device are filled with a transparent medium.

[0008] Further, the convex surface of the fixed convex lens faces upward, and the convex surface of the movable convex lens faces downward.

[0009] Furthermore, the adjusting device includes a storage cylinder, a storage chamber, a pushing plug plate, a moving internal threaded column, a mounting ring, a rotating threaded rod, a limiting rotating sleeve, a first spring, a limiting column, and a limiting hole. The storage cylinder is provided on the watch case, the storage chamber is arranged inside the storage cylinder, the pushing plug plate slides inside the storage chamber, the moving internal threaded column is provided on the pushing plug plate, the mounting ring is arranged on the storage cylinder, the rotating threaded rod is provided on the mounting ring, the rotating threaded rod cooperates with the moving internal threaded column, the limiting rotating sleeve slides on the rotating threaded rod, the rotating threaded rod is provided with a first spring for squeezing the limiting rotating sleeve, the storage cylinder is provided with a plurality of limiting holes, the limiting rotating sleeve is provided with a limiting column, the limiting column cooperates with the limiting hole, and the storage chamber communicates with the expansion chamber through a connecting pipe.

[0010] Furthermore, a lifting edge is provided on the outer side of the limiting rotating sleeve.

[0011] Furthermore, the number of the limiting columns is four, and the number of the limiting holes is an integer multiple of the number of the limiting columns.

[0012] Furthermore, the detection device includes a mounting cylinder, a heat receiving chamber, a mounting rack, a convex lens, a pushing plug plate, a second spring, a contact plate, and a contact point. The mounting cylinder is provided on the watch cover, the heat receiving chamber is arranged inside the mounting cylinder, the mounting rack is provided on the mounting cylinder, the convex lens is provided on the mounting rack, the light heats the heat receiving chamber by irradiating the convex lens, the pushing plug plate slides inside the heat receiving chamber, a second spring for moving the pushing plug plate upward is arranged between the pushing plug plate and the heat receiving chamber, the contact plate is provided on the pushing plug plate, a contact point is arranged above the contact plate, and the cleaning device is started after the contact point contacts the contact plate.

[0013] Furthermore, the cleaning device includes a servo motor and a cleaning wheel. The servo motor is provided on the watch case, and the servo motor cleans the lower end surface of the lens antenna through the cleaning wheel.

[0014] The advantages of the present invention are as follows:

[0015] By adopting non-contact measurement, the antenna does not contact the medium, and there is almost no wear, which enhances the service life of the product. Then, the adjusting device adjusts the focal length of the transmission device to adapt to a certain range of working distances, thereby reducing the blind area. The detection device controls the start or stop of the cleaning device according to the working environment conditions to clean the lower end surface of the lens antenna to avoid affecting the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a cross-sectional view of the overall structure of the present invention;

[0018] Figure 3 is Figure 2 a partially enlarged schematic diagram A;

[0019] Figure 4 Structural schematic diagram of the adjusting device and the conveying device of the present invention;

[0020] Figure 5 is Figure 4 cross-sectional view of;

[0021] Figure 6 is Figure 5 partial enlarged schematic diagram B;

[0022] Figure 7 Structural schematic diagram of the limit hole of the present invention;

[0023] Explanation of the marks in the figure:

[0024] Conveying device 1, mounting shell 1-1, fixed convex lens 1-2, moving convex lens 1-3 and expansion cavity 1-4; lens antenna 2, watch case 3, fixing screw 4, plug 5, electronic unit 6 and watch cover 7; adjusting device 8; storage cylinder 8-1, storage cavity 8-2, pushing plug plate 8-3, moving internal threaded column 8-4, mounting ring 8-5, rotating threaded rod 8-6, limit rotating sleeve 8-7, first spring 8-8, limit column 8-9 and limit hole 8-10; lifting edge 8-11; connecting pipe 8-12; detection device 9; mounting cylinder 9-1, heating cavity 9-2, mounting bracket 9-3, convex mirror 9-4, pushing plug plate 9-5, second spring 9-6, contact plate 9-7 and contact point 9-8; cleaning device 10; servo motor 10-1 and cleaning wheel 10-2. Detailed implementation manners

[0025] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] Such as Figure 1-7As shown in the figure, an 80G frequency modulation radar level gauge includes a transmission device 1, a lens antenna 2, a case 3, fixing screws 4, a plug 5, an electronic unit 6, and a case cover 7. The transmission device 1 is arranged inside the lens antenna 2, the lens antenna 2 is arranged inside the case 3, the electronic unit 6 is arranged inside the case 3, and the plug 5 and the case cover 7 are arranged on the case 3. It is characterized in that an adjusting device 8 for driving the transmission device 1 to change the focal length is provided on the case 3, a detecting device 9 is provided on the case cover 7, a cleaning device 10 for cleaning the surface of the lens antenna 2 is provided on the lens antenna 2, and the detecting device 9 controls the switch of the cleaning device 10.

[0028] By adopting non-contact measurement, the antenna does not contact the medium, and there is almost no wear, which enhances the service life of the product. Then, the focal length of the transmission device 1 is adjusted by the adjusting device 8 to adapt to a certain range of working distances, thereby reducing the blind area. The detecting device 9 will control the start or stop of the cleaning device 10 according to the working environment to clean the lower end face of the lens antenna 2 to avoid affecting the detection.

[0029] Among them, as Figure 1-7 shown, the transmission device 1 includes a mounting shell 1-1, a fixed convex lens 1-2, a movable convex lens 1-3, and an expansion cavity 1-4. The mounting shell 1-1 is arranged inside the lens antenna 2, the fixed convex lens 1-2 is arranged inside the mounting shell 1-1, the movable convex lens 1-3 is arranged in the mounting shell 1-1 and is located below the fixed convex lens 1-2. An expansion cavity 1-4 is provided between the fixed convex lens 1-2 and the movable convex lens 1-3. The expansion cavity 1-4 is communicated with the adjusting device 8, and the expansion cavity 1-4 and the adjusting device 8 are filled with a transparent medium.

[0030] When the medium is replenished inside the expansion cavity 1-4, the distance between the fixed convex lens 1-2 and the movable convex lens 1-3 will increase, and thus the focal length will be shortened and the detection range will be increased. When the medium inside the expansion cavity 1-4 decreases, the distance between the fixed convex lens 1-2 and the movable convex lens 1-3 will become smaller, the focal length will increase, and the detection range will be reduced.

[0031] Among them, as Figure 1-7 shown, the convex surface of the fixed convex lens 1-2 faces upward, and the convex surface of the movable convex lens 1-3 faces downward.

[0032] Among them, as Figure 1-7As shown, the adjusting device 8 includes a storage cylinder 8-1, a storage cavity 8-2, a pushing plug plate 8-3, a moving internal threaded column 8-4, a mounting ring 8-5, a rotating threaded rod 8-6, a limiting rotating sleeve 8-7, a first spring 8-8, a limiting column 8-9 and a limiting hole 8-10. The storage cylinder 8-1 is arranged on the watch case 3, the storage cavity 8-2 is arranged inside the storage cylinder 8-1, the pushing plug plate 8-3 slides inside the storage cavity 8-2, the moving internal threaded column 8-4 is provided on the pushing plug plate 8-3, the mounting ring 8-5 is arranged on the storage cylinder 8-1, the rotating threaded rod 8-6 is arranged on the mounting ring 8-5, the rotating threaded rod 8-6 cooperates with the moving internal threaded column 8-4, the limiting rotating sleeve 8-7 slides on the rotating threaded rod 8-6, the first spring 8-8 for squeezing the limiting rotating sleeve 8-7 is provided on the rotating threaded rod 8-6, a plurality of limiting holes 8-10 are provided on the storage cylinder 8-1, a limiting column 8-9 is provided on the limiting rotating sleeve 8-7, the limiting column 8-9 cooperates with the limiting hole 8-10, and the storage cavity 8-2 is communicated with the expansion cavity 1-4 through a connecting pipe 8-12.

[0033] By pulling up the limiting rotating sleeve 8-7, pulling the limiting column 8-9 out of the limiting hole 8-10, and then the driving limiting rotating sleeve 8-7 drives the rotating threaded rod 8-6 to rotate. The rotating threaded rod 8-6 causes the position of the moving internal threaded column 8-4 to change. The moving internal threaded column 8-4 drives the pushing plug plate 8-3 to slide inside the storage cavity 8-2, so that the storage cavity 8-2 supplements or sucks away the medium inside the expansion cavity 1-4 through the connecting pipe 8-12.

[0034] Among them, as Figure 1-7 shown, a lifting edge 8-11 is provided on the outer side of the limiting rotating sleeve 8-7.

[0035] Among them, as Figure 1-7 shown, the number of the limiting columns 8-9 is four, and the number of the limiting holes 8-10 is an integer multiple of the number of the limiting columns 8-9.

[0036] Among them, as Figure 1-7As shown, the detection device 9 includes a mounting cylinder 9-1, a heat receiving cavity 9-2, a mounting bracket 9-3, a convex mirror 9-4, a push plug plate 9-5, a second spring 9-6, a contact plate 9-7 and a contact point 9-8. The mounting cylinder 9-1 is arranged on the watch cover 7, the heat receiving cavity 9-2 is arranged inside the mounting cylinder 9-1, the mounting bracket 9-3 is arranged on the mounting cylinder 9-1, the convex mirror 9-4 is arranged on the mounting bracket 9-3, and the light heats the heat receiving cavity 9-2 by irradiating the convex mirror 9-4. The push plug plate 9-5 slides inside the heat receiving cavity 9-2, and a second spring 9-6 for moving the push plug plate 9-5 upward is arranged between the push plug plate 9-5 and the heat receiving cavity 9-2. The contact plate 9-7 is arranged on the push plug plate 9-5, and a contact point 9-8 is arranged above the contact plate 9-7. After the contact plate 9-7 and the contact point 9-8 come into contact, the cleaning device 10 is started.

[0037] When the temperature in the working ring is higher than the outside or there is too much dust, a water droplet layer or a dust layer will be formed on the surface of the lens antenna 2. The refraction of the water droplets and the blockage of the dust will both affect the signal transmission. Therefore, when the water droplets or dust attached to the surface of the mounting cylinder 9-1 have affected the heating of the heat receiving cavity 9-2, then the lens antenna 2 is also affected. When the temperature of the heat receiving cavity 9-2 decreases, the compressed second spring 9-6 will push the push plug plate 9-5 to move. The moving push plug plate 9-5 drives the contact plate 9-7 to move, so that the contact plate 9-7 and the contact point 9-8 come into contact. After the contact plate 9-7 and the contact point 9-8 come into contact, the cleaning device 10 is started.

[0038] Among them, as Figure 1-7 shown, the cleaning device 10 includes a servo motor 10-1 and a cleaning wheel 10-2. The servo motor 10-1 is arranged on the watch case 3, and the servo motor 10-1 cleans the lower end surface of the lens antenna 2 through the cleaning wheel 10-2.

[0039] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. An 80G frequency modulation radar level gauge, comprising a transmission device (1), a lens antenna (2), a case (3), fixing screws (4), a plug (5), an electronic unit (6) and a case cover (7). The transmission device (1) is arranged inside the lens antenna (2), the lens antenna (2) is arranged inside the case (3), the electronic unit (6) is arranged inside the case (3), and the plug (5) and the case cover (7) are arranged on the case (3), characterized in that, An adjusting device (8) for driving the transmission device (1) to change the focal length is provided on the watch case (3), a detecting device (9) is provided on the watch cover (7), a cleaning device (10) for cleaning the surface of the lens antenna (2) is provided on the lens antenna (2), and the detecting device (9) controls the switch of the cleaning device (10); the transmission device (1) includes a mounting shell (1-1), a fixed convex lens (1-2), a movable convex lens (1-3) and an expansion cavity (1-4), the mounting shell (1-1) is arranged inside the lens antenna (2), the fixed convex lens (1-2) is arranged inside the mounting shell (1-1), the movable convex lens (1-3) is arranged in the mounting shell (1-1) and is positioned below the fixed convex lens (1-2), an expansion cavity (1-4) is formed between the fixed convex lens (1-2) and the movable convex lens (1-3), the expansion cavity (1-4) is communicated with the adjusting device (8), and the expansion cavity (1-4) and the adjusting device (8) are filled with a transparent medium; the adjusting device (8) includes a storage cylinder (8-1), a storage cavity (8-2), a pushing plug plate (8-3), a movable internal threaded column (8-4), a mounting ring (8-5), a rotating threaded rod (8-6), a limiting rotating sleeve (8-7), a first spring (8-8), a limiting column (8-9) and a limiting hole (8-10), the storage cylinder (8-1) is arranged on the watch case (3), the storage cavity (8-2) is arranged inside the storage cylinder (8-1), the pushing plug plate (8-3) slides inside the storage cavity (8-2), the movable internal threaded column (8-4) is provided on the pushing plug plate (8-3), the mounting ring (8-5) is arranged on the storage cylinder (8-1), the rotating threaded rod (8-6) is arranged on the mounting ring (8-5), the rotating threaded rod (8-6) is matched with the movable internal threaded column (8-4), the limiting rotating sleeve (8-7) slides on the rotating threaded rod (8-6), the first spring (8-8) for pressing the limiting rotating sleeve (8-7) is provided on the rotating threaded rod (8-6), a plurality of limiting holes (8-10) are provided on the storage cylinder (8-1), the limiting column (8-9) is provided on the limiting rotating sleeve (8-7), the limiting column (8-9) is matched with the limiting holes (8-10), and the storage cavity (8-2) is communicated with the expansion cavity (1-4) through a connecting pipe (8-12);The detection device (9) includes a mounting cylinder (9-1), a heat receiving cavity (9-2), a mounting bracket (9-3), a convex mirror (9-4), a push plug plate (9-5), a second spring (9-6), a contact plate (9-7) and a contact point (9-8). The mounting cylinder (9-1) is arranged on the watch case (7), the heat receiving cavity (9-2) is arranged inside the mounting cylinder (9-1), the mounting bracket (9-3) is arranged on the mounting cylinder (9-1), the convex mirror (9-4) is arranged on the mounting bracket (9-3), and the heat receiving cavity (9-2) is heated by the light irradiating the convex mirror (9-4). The push plug plate (9-5) slides inside the heat receiving cavity (9-2), and a second spring (9-6) for moving the push plug plate (9-5) upward is arranged between the push plug plate (9-5) and the heat receiving cavity (9-2). The contact plate (9-7) is arranged on the push plug plate (9-5), and a contact point (9-8) is arranged above the contact plate (9-7). When the contact point (9-8) contacts the contact plate (9-7), the cleaning device (10) is started.; 2. The 80G frequency-modulated radar level gauge according to claim 1, characterized in that, The convex surface of the fixed convex mirror (1-2) faces upward, and the convex surface of the movable convex mirror (1-3) faces downward.

3. An 80G frequency modulation radar level gauge according to claim 1, characterized in that, A lifting edge (8-11) is provided on the outer side of the limit rotation sleeve (8-7).

4. An 80G frequency-modulated radar level gauge according to claim 1, characterized in that, The number of the limit posts (8-9) is four, and the number of the limit holes (8-10) is an integer multiple of the number of the limit posts (8-9).

5. An 80G frequency modulation radar level gauge according to claim 1, characterized in that, The cleaning device (10) includes a servo motor (10-1) and a cleaning wheel (10-2). The servo motor (10-1) is arranged on the watch case (3), and the servo motor (10-1) cleans the lower end surface of the lens antenna (2) through the cleaning wheel (10-2).

Images