Waveguide flange connecting device

Abstract

The invention discloses a waveguide flange connecting device, which belongs to the technical field of waveguides and comprises a circular waveguide flange A and a circular waveguide flange B. The circular waveguide flange A and the circular waveguide flange B are in butt joint. The butt joint face of the circular waveguide flange A and the butt joint face of the circular waveguide flange B are each provided with a standard rectangular waveguide opening, a positioning pin, a mechanical fixing circular hole and a pin hole. Wherein the standard rectangular waveguide ports, the positioning pins and the pin holes and the mechanical fixing round holes are opposite and are fixedly connected through screws; the invention has the characteristics of leakproofness, capability of realizing high-power inflation design, miniaturization, convenience in installation, universalization of interface design and the like.

Description

Technical Field

[0001] The present invention relates to the field of waveguide technology, and in particular to a waveguide flange connection device. Background Art

[0002] At present, in the field of high-power millimeter wave antenna technology, antennas are required to withstand increasingly large transmission powers, and correspondingly higher technical requirements are put forward for waveguide transmission networks. Under the premise of meeting the power capacity, the feeder transmission loss is reduced as much as possible. There are multiple waveguide flange connection sections in the high-power millimeter wave antenna feeder network. The current internationally common flange standard is the FUGP standard, which is a male-to-male form. Its process feature is to use screws, pins and raised waveguide port step design around the waveguide port to achieve a tight connection of the flange end face, prevent signal leakage and achieve a closed network design. In actual engineering operations, the fixing method of combining pins and screws is difficult to ensure a tight connection of the end face, resulting in a "warping" phenomenon. In this way, when high-power millimeter wave signals are transmitted, signal leakage, increased loss, air leakage, sparking and other phenomena will occur on the flange end face, seriously affecting the normal operation of the antenna system.

[0003] In engineering applications, choke grooves are usually set around the waveguide flange surface to suppress signal leakage, but the effect is limited and will produce large standing waves and certain transmission losses. Different forms of waveguide flange choke structures are used in different fields:

[0004] Waveguide slot antenna array: A choke slot is set at the joint between the waveguide sub-arrays to prevent the current from resonating at the slot, causing unnecessary loss and radiation, and changing the radiation characteristics of the antenna;

[0005] Synthetic aperture radar: Multiple sub-arrays of synthetic aperture radar are fed through waveguides, and circular choke slots are set on the flange to reduce signal transmission losses;

[0006] Feed network system: There are a large number of waveguides in the feed network system. Flange devices are set at the joints of different waveguides. Circular choke grooves are set on the flange surface to suppress signal leakage.

[0007] Advantages and disadvantages of the above waveguide choke structures: Although their individual indicators are superior, their common defect is that the choke effect is limited, their structure is closely related to the bandwidth of the transmission signal, and cannot meet the technical requirements of the equipment for low insertion loss within the frequency band.

[0008] Although the choke structure can solve the problem of waveguide network transmission loss to a certain extent, it has no effect on the sealed design of millimeter-wave high-power and high-precision waveguide flanges. Summary of the invention

[0009] 1) Technical issues to be solved

[0010] In view of this, the present invention proposes a waveguide flange connection device, the main structure of which is a waveguide flange, which has the characteristics of airtightness, high-power inflation design, miniaturization, easy installation, and universal interface design.

[0011] (II) Technical solution

[0012] The invention provides a waveguide flange connection device

[0013] It comprises a circular waveguide flange A and a circular waveguide flange B, wherein the circular waveguide flange A and the circular waveguide flange B are butt-jointed;

[0014] The butt joint surface of the circular waveguide flange A and the butt joint surface of the circular waveguide flange B are both provided with a standard rectangular waveguide port, a positioning pin, a mechanical fixing circular hole and a pin hole; wherein the standard rectangular waveguide ports of the two are facing each other, the positioning pin and the pin hole are facing each other, and the mechanical fixing circular holes are facing each other and are fixedly connected by screws;

[0015] The butt joint surface of the circular waveguide method A is also provided with a circular sealing strip groove (3), an outer ring (12) and a waveguide port boss (2);

[0016] The standard rectangular waveguide opening of the circular waveguide flange A is located at the center of the waveguide opening boss; the circular sealing strip groove (3) is located at the periphery of the waveguide opening boss and is used to place a sealing ring;

[0017] An annular groove (11) is arranged around the periphery of the circular sealing strip groove (3); the diameter of the annular groove is smaller than the outer contour diameter of the flange A, and the bottom is flush with the upper surface of the circular sealing strip groove (3); the groove surface of the annular groove (11) is 0.05 mm lower than the waveguide mouth boss, and the top edge is located in the same plane as the waveguide mouth boss.

[0018] (III) Beneficial effects

[0019] It can be seen from the above technical solution that the present invention has at least one or part of the following beneficial effects:

[0020] 1. The groove and boss combination structure proposed in the present invention avoids the disadvantage of warping during the installation of the traditional millimeter wave high-power waveguide network flange male-to-male structure.

[0021] 2. The structure of the present invention can effectively solve the technical problem of the sealed design of the millimeter wave high-power waveguide network flange and can be effectively applied in engineering design. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To further illustrate the technical content of the present invention, the content of the present invention is further described in detail below in conjunction with embodiments and drawings, wherein:

[0023] Figure 1 It is a schematic diagram of an exploded side view of the waveguide flange connection device in an embodiment of the present invention;

[0024] Figure 2 It is an exploded schematic diagram of the rear view structure of the waveguide flange connection device in an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the front structure explosion of the waveguide flange connection device in an embodiment of the present invention; DETAILED DESCRIPTION

[0026] Below, the present invention is further described in conjunction with the accompanying drawings.

[0027] The waveguide flange connection device is composed of a pair of circular waveguide flanges A and a circular waveguide flange B. Flange A is provided with: a standard rectangular waveguide opening 1, a waveguide opening boss 2, a circular sealing strip groove 3, a positioning pin 5, a mechanical fixing circular hole 6, a pin hole 7, an annular groove 11, and an outer ring 12. Circular waveguide flange B is provided with: a standard rectangular waveguide opening 4, a mechanical fixing circular hole 8, a positioning pin 9, and a pin hole 10.

[0028] Furthermore, the circular holes and positioning pins provided on the flange surface and the outer contour dimensions of the flange are consistent with international standards and can meet the requirements for matching connection therewith.

[0029] The circular waveguide flange A and the circular waveguide flange B can achieve hole docking;

[0030] The waveguide port boss 2 is at the same height as the rectangular waveguide port 1, and the boss cross section is circular, with a diameter greater than the diagonal length of the rectangular waveguide port;

[0031] A circular sealing strip groove 3 is arranged around the waveguide port boss 2, and its depth is suitable for placing a sealing ring;

[0032] An annular groove 11 is arranged around the circular sealing strip groove 3. The diameter of the annular groove is smaller than the outer contour diameter of the flange A. The bottom is flush with the upper surface of the circular sealing strip groove 3. The upper surface of the inner ring of the annular groove 11 is slightly lower than the waveguide mouth boss 2, and the surface of the outer ring 12 is flush with the waveguide mouth boss 2.

[0033] The surface of waveguide flange B is designed to be flat, and is provided with pins, fixing circular holes, pin holes, and rectangular waveguide openings, the sizes and positions of which correspond to the sizes of the corresponding structure of flange A.

[0034] The following is a more specific embodiment:

[0035] like Figures 1 to 3As shown, the technical solution provided by the present invention is: the waveguide flange connection device is composed of a pair of circular waveguide flanges A and a circular waveguide flange B, and flange A is provided with: a standard rectangular waveguide port 1, a waveguide port boss 2, a circular sealing strip groove 3, a positioning pin 5, a mechanical fixing circular hole 6, a pin hole 7, an annular groove 11, and an outer ring 12.

[0036] Furthermore, the standard rectangular waveguide port 1 is of universal standard size for millimeter waves and can meet the requirements of universal standard flange waveguide port docking.

[0037] The circular waveguide flange A and the circular waveguide flange B can achieve hole docking;

[0038] The waveguide port boss 2 is in the same height as the rectangular waveguide port 1. The boss cross section is circular, and the diameter is larger than the diagonal length of the rectangular waveguide port. It can be consistent with the boss diameter of the international universal flange as needed, so that it can be connected with the universal standard flange. The boss surface must meet the surface roughness requirements of the working frequency band;

[0039] A circular sealing strip groove 3 is arranged around the outer side of the waveguide port boss 2, and its depth is suitable for placing a sealing ring for a sealed, waterproof and airtight design;

[0040] An annular groove 11 is arranged around the outside of the circular sealing strip groove 3. The diameter of the annular groove is smaller than the outer contour diameter of the flange A. The bottom is flush with the upper surface of the circular sealing strip groove 3. The upper surface of the inner ring of the annular groove 11 is slightly lower than the waveguide mouth boss by 0.05mm. The goal of this design is that when flanges A and B are installed in a closed butt joint, during the screw locking process, the boss 2 and the outer ring 12 act as fulcrums, so that the flange surface can be more closely fitted. Compared with the traditional waveguide flange surface, the annular groove 11 reduces the contact area of ​​the flange surface. The boss 2 and the outer ring 12 are in the same plane to avoid the possibility of warping of the flange surface; the surface of the waveguide flange B is a flat design, and is provided with pins, fixed circular holes, pin holes, and rectangular waveguide mouths, and their sizes and positions correspond to the structure of flange A.

[0041] Compared with the traditional waveguide flange, the waveguide flange connection device can realize the closed connection of the millimeter wave band high-power network

[0042] Avoid engineering and technical problems such as air leakage in the inflatable waveguide, water ingress, and sparking of high-power signal transmission caused by installation errors.

[0043] The working principle of the waveguide flange connection device is as follows: when flange A and flange B are docked and installed according to the pin position, the special structures such as the boss, circular sealing strip groove, annular groove, outer ring, etc. set on the flange ensure the precise docking of the screw flange. The fulcrum design of the boss and the outer ring during the screw locking process can make the two flange surfaces fit well, avoiding the technical problem of warping of the traditional millimeter wave waveguide flange surface, ensuring seamless transmission of signals, and achieving the goal of waterproofing and air leakage through the closed design of the flange. It has obvious advantages over the traditional waveguide flange design. At the same time, the outer contour dimensions of the circular boss and the flange, as well as the pin holes and connecting holes are consistent with the international standard flanges, which can realize universal assembly without the need for conversion.

[0044] It should be understood that the above description of the specific implementation methods of this patent is only an exemplary description listed to facilitate ordinary technicians in the field to understand the patent scheme, and does not imply that the scope of protection of this patent is limited to these individual examples. Ordinary technicians in this field can fully understand the technical scheme of this patent and, without any creative work, obtain more specific implementation methods by combining technical features, replacing some technical features, adding more technical features, etc. to the examples listed in this patent. All these specific implementation methods are within the scope of the claims of this patent. Therefore, these new specific implementation methods should also be within the scope of protection of this patent.

[0045] In addition, for the purpose of simplifying the description, this patent may not list some common specific implementation schemes, which are naturally conceivable to ordinary technicians in this field after understanding the technical solution of this patent. Obviously, these solutions should also be included in the scope of protection of this patent.

[0046] For the purpose of simplifying the description, the disclosure of technical details in the above-mentioned specific implementations may only reach the extent that those skilled in the art can decide on their own, that is, for the technical details not disclosed in the above-mentioned specific implementations, ordinary technicians in this field can completely complete them with the help of textbooks, reference books, papers, patents, audio-visual products and other published documents without any creative work, under the full prompts of the technical solution of this patent, or these details are the content that ordinary technicians in this field can decide on their own according to actual conditions under the common understanding. It can be seen that even if these technical details are not disclosed, it will not affect the sufficiency of the disclosure of the technical solution of this patent.

[0047] In short, based on the interpretation of the scope of protection of the claims by this patent specification, any specific implementation scheme that falls within the scope of the claims of this patent is within the scope of protection of this patent.

Claims

1. A waveguide flange connection device, characterized in that: It comprises a circular waveguide flange A and a circular waveguide flange B, wherein the circular waveguide flange A and the circular waveguide flange B are butt-jointed; The butt joint surface of the circular waveguide flange A and the butt joint surface of the circular waveguide flange B are both provided with a standard rectangular waveguide port, a positioning pin, a mechanical fixing circular hole and a pin hole; wherein the standard rectangular waveguide ports of the two are facing each other, the positioning pin and the pin hole are facing each other, and the mechanical fixing circular holes are facing each other and are fixedly connected by screws; The butt joint surface of the circular waveguide method A is also provided with a circular sealing strip groove (3), an outer ring (12) and a waveguide port boss (2); The standard rectangular waveguide opening of the circular waveguide flange A is located at the center of the waveguide opening boss; the circular sealing strip groove (3) is located at the periphery of the waveguide opening boss and is used to place a sealing ring; An annular groove (11) is arranged around the periphery of the circular sealing strip groove (3); the diameter of the annular groove is smaller than the outer contour diameter of the flange A, and the bottom is flush with the upper surface of the circular sealing strip groove (3); the groove surface of the annular groove (11) is 0.05 mm lower than the waveguide mouth boss, and the top edge is located in the same plane as the waveguide mouth boss.

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