An antenna system for reflecting radar waves by 90°

Abstract

The present invention discloses an antenna system for reflecting radar waves by 90°, which includes a threaded sleeve, a universal rotating device disposed outside the threaded sleeve and axially positioned on one side of the threaded sleeve, a shaft retaining ring disposed on the circumferential surface of the threaded sleeve and abutting against the universal rotating device, a set screw passing through the universal rotating device and abutting against the threaded sleeve, a polytetrafluoroethylene thin plate disposed at one end of the universal rotating device away from the threaded sleeve, and a reflector disposed on one side of the polytetrafluoroethylene thin plate on the universal rotating device. The reflector is inclined with respect to the end face of the universal rotating device, and the reflector is fixedly installed on the universal rotating device. This device enables radar level / liquid level radar to achieve an installation form that cannot be measured by the conventional installation method by being side-mounted on the tank wall. Through a compact structural design, simple assembly is achieved, it is durable, and it can basically match most of the radar level / liquid level radars on the market.

Description

Technical Field

[0001] The present invention relates to an antenna system for reflecting radar waves by 90°, and particularly to an antenna system for reflecting radar waves by 90° that can be mounted on the side, has a compact structure, and good usage effects. Background Art

[0002] In the implementation of industrial process control and factory automation, it is very crucial to stably and reliably measure the height of the material level. Radar level gauges have become the mainstream products in the market due to their characteristics of non-contact, stable and accurate measurement, safe and reliable performance, and simple and convenient maintenance.

[0003] In a frequency modulation continuous wave (FMCW) radar, within a frequency modulation period, a microwave with a linearly changing frequency is continuously transmitted through a microwave transceiver antenna, and at the same time, the reflected microwave is received. The spatial distance between the radar and the target causes a frequency difference (intermediate frequency signal, IF) between the currently transmitted microwave frequency and the reflected microwave frequency. By extracting this intermediate frequency signal, and then processing the intermediate frequency signal, the corresponding target distance can be calculated.

[0004] Since the equipment usage environment in industrial applications is usually relatively harsh, products that are durable, miniaturized, easy to install, and low-cost are more popular in the market without affecting the realization of functions.

[0005] Most of the radar level / liquid level radars on the current market adopt the installation method of opening holes at the top of the measured tank to measure the material level / liquid level. This installation method can meet the installation requirements of most tanks, but in some cases where there is no available space at the top of the tank, or the top space is occupied by other equipment, the radar level / liquid level radar that is suitable for installation at the top of the tank becomes useless. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an antenna system for reflecting radar waves by 90°, which has the characteristics of being mountable on the side, having a compact structure, and good usage effects.

[0007] To solve the above technical problems, the technical solution of the present invention is as follows: An antenna system for reflecting radar waves at 90°, and its innovation lies in that: the antenna system for reflecting radar waves at 90° includes a threaded sleeve parallel to the central axis of the level radar or liquid level radar and threadedly connected to the level radar or liquid level radar, a universal rotating device arranged outside the threaded sleeve and axially positioned on one side of the threaded sleeve, a shaft retaining ring arranged on the circumferential surface of the threaded sleeve and abutting against the universal rotating device, a set screw passing through the universal rotating device and abutting against the threaded sleeve, a polytetrafluoroethylene thin plate arranged at one end of the universal rotating device away from the threaded sleeve, and a reflector arranged on one side of the polytetrafluoroethylene thin plate on the universal rotating device. The reflector is inclined with respect to the end face of the universal rotating device, and the reflector is fixedly installed on the universal rotating device.

[0008] Preferably, the universal rotating device is a sleeve-shaped structure with a horizontally arranged central axis, and the polytetrafluoroethylene thin plate is fixedly installed at the left end of the sleeve-shaped structure; an installation reference surface with the same inclination angle as the reflector is arranged at the left end of the sleeve-shaped structure, and the reflector is screwed and fastened on the installation reference surface; the central axes of the threaded sleeve and the universal rotating device coincide, and the threaded sleeve is installed at the right end of the universal rotating device.

[0009] Preferably, the inclination angles of the installation reference surface and the reflector with respect to the horizontal plane are 45 degrees.

[0010] Preferably, the polytetrafluoroethylene thin plate is vertically arranged, and the fixed feet of the polytetrafluoroethylene thin plate are fixedly installed at the left end of the sleeve-shaped structure.

[0011] Preferably, after the reflector is installed on the installation reference surface, the polytetrafluoroethylene thin plate abuts against the reflector.

[0012] Preferably, a boss is arranged at the right end of the universal rotating device, and a convex ring is arranged on the threaded sleeve at the left side of the threaded sleeve. The convex ring abuts against the boss axially.

[0013] Preferably, an annular groove for partially embedding the shaft retaining ring is arranged on the circumferential surface of the threaded sleeve. After the shaft retaining ring is partially embedded in the annular groove, it abuts against the universal rotating device.

[0014] Preferably, a positioning hole for the set screw to pass through is arranged on the universal rotating device, and a triangular ring groove is arranged on the circumferential surface of the threaded sleeve. The set screw passing through the positioning hole abuts against the triangular ring groove.

[0015] Preferably, the cross-section of the triangular annular groove is composed of two obliquely arranged first inclined surfaces and second inclined surfaces, and a spherical surface located at the intersection of the first inclined surface and the second inclined surface. The spherical surface is located at the bottom of the triangular annular groove, and the set screw is driven into the spherical surface.

[0016] Preferably, the included angle between the two obliquely arranged inclined surfaces is 15-30 degrees.

[0017] The advantages of the present utility model are as follows: The antenna device capable of reflecting radar waves at 90° includes a reflector, a universal rotating device, and a threaded sleeve structure for connecting with a radar level / liquid level radar. The inclined installation method of the reflector is also beneficial to preventing water droplets from condensing and affecting the measurement under the working condition of measuring liquid. The universal rotating device enables the radar level / liquid level radar not to consider the installation direction of the radar device during installation. The threaded sleeve structure enables the antenna device to better match the connection method of the radar level / liquid level radar on the market.

[0018] Through the newly designed antenna device, the radar level / liquid level radar can realize an installation form that cannot be measured by the conventional installation method by being side-mounted on the tank wall. Through a compact structure design, simple assembly and durability are achieved, and basically, it can match most of the radar level / liquid level radars on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0020] Figure 1 is an exploded perspective view of an antenna system for reflecting radar waves at 90° according to the present invention.

[0021] Figure 2 is a schematic structural diagram of an antenna system for reflecting radar waves at 90° according to the present invention.

[0022] Figure 3 is a schematic structural diagram of a triangular annular groove in an antenna system for reflecting radar waves at 90° according to the present invention.

[0023] Figure 4 is an assembly diagram of an antenna system for reflecting radar waves at 90° according to the present invention and a level radar.

[0024] In the figure: 1 - screw, 2 - reflector, 3 - polytetrafluoroethylene thin plate, 4 - universal rotating device, 41 - installation reference surface, 42 - boss, 43 - positioning hole, 5 - set screw, 6 - threaded sleeve, 61 - convex ring, 62 - annular groove, 63 - triangular annular groove, 631 - first inclined surface, 632 - second inclined surface, 633 - spherical surface, 7 - shaft retaining ring, 8 - level radar or liquid level radar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The antenna system for reflecting radar waves by 90° according to the present invention includes a threaded sleeve 6 that is parallel to the central axis of a level radar or a liquid level radar 8 and is threadedly connected to the level radar or the liquid level radar, a universal rotating device 4 disposed outside the threaded sleeve and axially positioned on one side of the threaded sleeve, a shaft retaining ring 7 disposed on the circumferential surface of the threaded sleeve and abutting against the universal rotating device, a set screw 5 passing through the universal rotating device and abutting against the threaded sleeve, a polytetrafluoroethylene thin plate 3 disposed at one end of the universal rotating device away from the threaded sleeve, and a reflector 2 disposed on one side of the polytetrafluoroethylene thin plate on the universal rotating device. The reflector 2 is inclined with respect to the end face of the universal rotating device 4 and is fixedly installed on the universal rotating device 4. This antenna device capable of reflecting radar waves by 90° includes a reflector, a universal rotating device, and a threaded sleeve structure that connects to the radar level / liquid level radar. The inclined installation method of the reflector is also beneficial for preventing water droplets from condensing and affecting the measurement under the condition of measuring liquid. The universal rotating device enables the radar level / liquid level radar not to consider the installation direction of the radar device during installation. The threaded sleeve structure enables the antenna device to better match the connection methods of radar level / liquid level radars on the market. Through the newly designed antenna device, the radar level / liquid level radar can achieve an installation form that cannot be measured by the conventional installation method by being side-mounted on the tank wall. Through a compact structure design, simple assembly and durability are achieved, and it can basically match most of the radar level / liquid level radars on the market.

[0026] The above-mentioned universal rotating device 4 is a sleeve-shaped structure with a horizontally arranged central axis, and the polytetrafluoroethylene thin plate 3 is fixedly installed at the left end of the sleeve-shaped structure. An installation reference surface 41 with the same inclination angle as the reflector 2 is provided at the left end of the sleeve-shaped structure, and the reflector is fastened to the installation reference surface 41 by screws 1. The threaded sleeve 6 coincides with the central axis of the universal rotating device 4, and the threaded sleeve 6 is installed at the right end of the universal rotating device 4. The inclination angles of the above-mentioned installation reference surface 41 and the reflector 2 with respect to the horizontal plane are 45 degrees.

[0027] The above-mentioned polytetrafluoroethylene thin plate 3 is vertically arranged, and the fixed feet of the polytetrafluoroethylene thin plate 3 are fixedly installed at the left end of the universal rotating device 4. After the reflector 2 is installed on the installation reference surface 41, the polytetrafluoroethylene thin plate 3 abuts against the reflector 2, and the polytetrafluoroethylene thin plate 3 serves to block dust and transmit waves. A boss 42 is provided at the right end of the universal rotating device 4, and a convex ring 61 is provided on the threaded sleeve 6 at the left side of the threaded sleeve. The convex ring 61 abuts against the boss 42 axially.

[0028] An annular groove 62 for partially embedding the shaft retaining ring 7 is provided on the circumferential surface of the above-mentioned threaded sleeve 6. After the shaft retaining ring is partially embedded in the annular groove, it abuts against the universal rotating device 4 to restrict the freedom degree on the right side of the universal rotating device 4.

[0029] The above-mentioned universal rotating device 4 is provided with a positioning hole 43 for a set screw 5 to pass through, and the threaded sleeve 6 is provided with a triangular annular groove 63 on the circumferential surface of the threaded sleeve. The set screw 5 passing through the positioning hole 43 abuts against the triangular annular groove 63. The cross-section of the triangular annular groove 63 is composed of two obliquely arranged first inclined surfaces 631 and second inclined surfaces 632 and a spherical surface 633 located at the intersection of the first inclined surface and the second inclined surface. The spherical surface is located at the bottom of the triangular annular groove, and the set screw 5 is driven into the spherical surface 633. The included angle between the two obliquely arranged first inclined surfaces 631 and second inclined surfaces 632 is 15-30 degrees.

[0030] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and many applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of the equivalents of these claims. For the sake of completeness, all articles and references including patent applications and published announcements are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not a waiver of that subject matter, nor should it be assumed that the inventor did not consider that subject matter to be part of the disclosed inventive subject matter.

Claims

1. An antenna system for reflecting radar waves by 90°, Characterized in that: The antenna system for reflecting radar waves by 90° includes a threaded sleeve parallel to the central axis of a level radar or a liquid level radar and threadedly connected to the level radar or the liquid level radar, a universal rotating device arranged outside the threaded sleeve and axially positioned on one side of the threaded sleeve, a shaft retaining ring arranged on the circumferential surface of the threaded sleeve and abutting against the universal rotating device, a set screw passing through the universal rotating device and abutting against the threaded sleeve, a polytetrafluoroethylene thin plate arranged at one end of the universal rotating device away from the threaded sleeve, and a reflector arranged on one side of the polytetrafluoroethylene thin plate on the universal rotating device. The reflector is inclined with respect to the end face of the universal rotating device, and the reflector is fixedly installed on the universal rotating device.

2. The antenna system for reflecting radar waves by 90° according to claim 1, Characterized in that: The universal rotating device is a sleeve-shaped structure with a horizontally arranged central axis, and the polytetrafluoroethylene thin plate is fixedly installed at the left end of the sleeve-shaped structure; an installation reference surface with the same inclination angle as the reflector is arranged at the left end of the sleeve-shaped structure, and the reflector is screwed and fastened on the installation reference surface; the central axes of the threaded sleeve and the universal rotating device coincide, and the threaded sleeve is installed at the right end of the universal rotating device.

3. The antenna system for reflecting radar waves by 90° according to claim 2, Characterized in that: The inclination angles of the installation reference surface and the reflector with respect to the horizontal plane are 45 degrees.

4. The antenna system for reflecting radar waves by 90° according to claim 2, Characterized in that: The polytetrafluoroethylene thin plate is vertically arranged, and the fixed feet of the polytetrafluoroethylene thin plate are fixedly installed at the left end of the sleeve-shaped structure.

5. The antenna system for reflecting radar waves by 90° according to claim 2, Characterized in that: After the reflector is installed on the installation reference surface, the polytetrafluoroethylene thin plate abuts against the reflector.

6. The antenna system for reflecting radar waves by 90° according to claim 2, Characterized in that: A boss is arranged at the right end of the universal rotating device, and a convex ring is arranged on the threaded sleeve on the left side of the threaded sleeve. The convex ring axially abuts against the boss.

7. The antenna system for reflecting radar waves by 90° according to claim 1, Characterized in that: An annular groove for partially embedding the shaft retaining ring is arranged on the circumferential surface of the threaded sleeve. After the shaft retaining ring is partially embedded in the annular groove, it abuts against the universal rotating device.

8. The antenna system for reflecting radar waves by 90° according to claim 1, Characterized in that: A positioning hole for passing the set screw is arranged on the universal rotating device, and a triangular ring groove is arranged on the circumferential surface of the threaded sleeve. The set screw passing through the positioning hole abuts in the triangular ring groove.

9. The antenna system for reflecting radar waves by 90° according to claim 8, Characterized in that: The cross-section of the triangular annular groove consists of two first inclined surfaces and a second inclined surface which are inclined, and a spherical surface located at the intersection of the first inclined surface and the second inclined surface. The spherical surface is located at the bottom of the triangular annular groove, and the set screw is driven into the spherical surface.

10. An antenna system for reflecting radar waves at 90° as described in claim 9, characterized in that: The included angle between the two inclined surfaces arranged obliquely is 15-30 degrees.

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