CN219534849U - Waveguide circulator with self-locking screw - Google Patents

Abstract

The utility model discloses a waveguide circulator with a self-locking screw, which mainly comprises a waveguide circulator part and a self-locking screw part: the waveguide circulator part comprises an upper cavity, a lower cavity, ferrite, a permanent magnet, a magnetic circuit board and a fastening screw; the self-locking screw part comprises a riveting pipe, an inner screw, an elastic pad and a flat pad, the riveting pipe is closed, the inner screw, the elastic pad and the flat pad are firmly arranged inside the riveting pipe, the self-locking screw part is not influenced by external magnetic adsorption force, and the circulator is convenient to install and use; the permanent magnet is completely surrounded by adopting cavity hole and magnetic circuit design, so that the magnetic leakage of the circulator is effectively reduced; and the upper cavity and the lower cavity are both designed with cooling fins, which is beneficial to timely and effectively dissipating heat generated by the operation of the circulator and ensures that the circulator can stably operate for a long time.

Description

Waveguide circulator with self-locking screw

Technical Field

The utility model belongs to the field of microwave ferrite devices such as isolators and circulators, and particularly relates to a waveguide circulator with self-locking screws.

Technical Field

The microwave ferrite device is made by using gyromagnetic effect of ferrite materials. The microwave ferrite material is used as gyromagnetic medium, can be approximately regarded as uniform and isotropic under the condition of no magnetization, and is externally applied with a direct current constant magnetic field H ₀ It becomes anisotropic under the influence of (a). Because gyromagnetic media have anisotropic properties, electromagnetic waves propagate in such media to produce a series of new effects, such as faraday rotation effects, nonreciprocal field-shift effects, resonance absorption, and changes in tensor permeability, which can be used to make various types of microwave ferrite devices.

The circulator is a special device made of microwave ferrite material, can be made into a coaxial structure or a waveguide structure, uses ferrite material as a medium, is provided with a waveguide cavity structure, and has the characteristic of circularity by externally applying a constant magnetic field.

Because of the characteristic of the external constant magnetic field, the magnetic leakage effect of the general circulator exists, and for the isolator and the circulator product which are installed by adopting the screw, the screw or the screwdriver can be adsorbed by the external magnetic field in the installation process, so that certain installation inconvenience and potential safety hazard of redundant substances are caused.

Most of the prior art is directed to solving the performance problem of the circulator, for example, CN 210838043U discloses a ridge waveguide ferrite circulator, which comprises a first ridge waveguide, a second ridge waveguide, a third ridge waveguide and ferrite, and the practical disclosed waveguide circulator has higher bandwidth and lower loss;

for example, CN 205028990U discloses a low intermodulation waveguide circulator, a split waveguide cavity is adopted, two ferrite sheets and a dielectric sheet are arranged in the waveguide cavity, and all edges of the ferrite sheets and the dielectric sheet are subjected to round chamfering treatment, so that intermodulation can be greatly improved. The waveguide circulator with performance advantages disclosed above has certain advantages but cannot solve the technical problems mentioned in the technical background, so the utility model solves the technical problems pertinently according to the technical background.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a waveguide circulator with a self-locking screw.

In order to achieve the above object, the present utility model provides a specific technical solution as follows:

a waveguide circulator with a self-locking screw, comprising:

the waveguide circulator consists of an upper cavity and a lower cavity, wherein circular matching blocks are processed at the inner sides of the upper cavity and the lower cavity, and ferrite is placed on the matching blocks; the outer sides of the upper cavity and the lower cavity are provided with cavity holes, a first permanent magnet is placed in the cavity holes of the upper cavity, and a second permanent magnet is placed in the cavity holes of the lower cavity; the upper cavity and the lower cavity are tightly attached through fastening screws, the ferrite is wrapped in a cavity formed by the upper cavity and the lower cavity, and a U-shaped magnetic circuit board is clamped on a cavity hole at the outer side of the cavity; the self-locking screw comprises a riveting pipe, an inner screw, a spring pad and a flat pad, and is arranged in a reserved hole outside the cavity.

Preferably, screw holes are formed in the upper cavity and the lower cavity, the screw holes are distributed along the outer contour edge of the lower cavity, and the fastening screw is installed in the screw holes.

By adopting the technical scheme, the ferrite is wrapped in the upper cavity and the lower cavity, and the ferrite is tightly attached through the fastening screw, so that the tightness of the upper cavity and the lower cavity is increased; and a closed magnetic circuit is formed by the permanent magnet in the cavity and the externally added U-shaped magnetic circuit board, so that the exposure of the permanent magnet is further blocked, and the magnetic leakage is effectively reduced.

Preferably, the rivet pipe is placed in the reserved hole, an inner screw is installed in the rivet pipe, and an elastic pad and a flat pad are sequentially sleeved on the inner screw.

By adopting the technical scheme, the riveting pipe is used for wrapping accessories such as the screw and the like inside to form a stable whole, the riveting pipe is arranged at the reserved position of the circulator flange, the fastening screw is not required to be additionally assembled during the installation of the circulator, and the inconvenience in installation and the potential safety hazard of generating excessive materials caused by the adsorption effect due to the externally applied magnetic field during the installation are reduced.

Preferably, the upper cavity and the lower cavity are symmetrically welded with cooling fins respectively, and the cooling fins are perpendicular to the plane where the cavities are located.

Preferably, the upper cavity and the lower cavity are provided with cavity holes, and the connecting lines of the cavity holes and the centers of the ferrite, the first permanent magnet, the second permanent magnet and the matching block are perpendicular to the planes of the upper cavity and the lower cavity.

Preferably, the fastening screw and the self-locking screw are respectively arranged at two ends of the radiating fin; and at least two cooling fins are arranged between the adjacent self-locking screws.

By adopting the technical scheme, the circulator can radiate heat in time, and long-term stable operation of the circulator is ensured; the radiating fin is used as a partition wall of the self-locking screw, and the position of the radiating groove corresponds to the mounting hole of the reserved self-locking screw, so that the operation of the circulator during mounting is facilitated.

The utility model has the beneficial effects that:

1) The design of directly processing the radiating fins by adopting the upper cavity structure and the lower cavity structure is beneficial to radiating the circulator, and ensures the long-term stable operation of the circulator; 2) The radiating fin is used as a partition wall of the self-locking screw, and the position of the radiating groove corresponds to the mounting hole of the reserved self-locking screw, so that the operation of the circulator during mounting is facilitated; 3) The waveguide circulator is provided with the self-locking screw, so that the installation operation is very convenient, and the installation efficiency is effectively improved; 4) The permanent magnet is completely surrounded by the cavity hole and the magnetic circuit, so that magnetic leakage is effectively reduced.

Drawings

FIG. 1 is an overall schematic of the apparatus;

FIG. 2 is an overall exploded view of the device;

FIG. 3 is a detailed view of the cavity of the device;

FIG. 4 is an assembly schematic of a self-locking screw;

fig. 5 is a comparison of the front and rear of the closing process of the self-locking screw.

Reference numerals: 1. an upper cavity; 2. a lower cavity; 3. u-shaped magnetic circuit board; 4. self-locking screws; 41. riveting a pipe; 42. an inner screw; 43. a spring pad; 44. a flat pad; 5. a ferrite; 61. a first permanent magnet; 62. a second permanent magnet; 7. a preformed hole; 8. a screw hole; 9. a heat sink; 10. a fastening screw; 11. a matching block; 12. and a cavity hole.

The specific embodiment is as follows:

the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 3, a waveguide circulator with a self-locking screw, comprising: the waveguide circulator consists of an upper cavity 1 and a lower cavity 2, a circular matching block 11 is processed in the upper cavity 1 and the lower cavity 2, ferrite 5 is placed on the matching block 11, a cavity hole 12 is formed in the upper cavity 1, and a first permanent magnet 61 and a second permanent magnet 62 are placed in the cavity hole 12;

the upper cavity 1 and the lower cavity 2 shown in fig. 2 are tightly attached through the fastening screw 10, so that the waveguide circulator is stable and tight; two ferrites 5 are wrapped in a cavity formed by the upper cavity 1 and the lower cavity 2, a cavity hole is formed in a groove of the cavity, and a U-shaped magnetic circuit board 3 is clamped in the groove of the cavity, so that magnetic leakage is effectively reduced.

As shown in fig. 4, the self-locking screw 4 comprises a riveting tube 41, an inner screw 42, a spring pad 43 and a flat pad 44, and the self-locking screw 4 is arranged in 6 reserved holes 7 at the outer lower edge of the cavity, so that the circulator is convenient to install.

Referring to fig. 5, the rivet pipe 41 is placed in the preformed hole 7, the inner screw 42 is installed in the rivet pipe 41, the elastic pad 43 and the flat pad 44 are sequentially sleeved on the inner screw 42, after the inner screw 42 with the elastic pad 43 and the flat pad 44 is installed in the rivet pipe 41, the rivet pipe 41 is riveted in the preformed hole 7 of the circulator through a special tool, the inner screw 42, the elastic pad 43 and the flat pad 44 are installed and enclosed in the rivet pipe 41 after the rivet pipe 41 is closed, the influence of external magnetic adsorption force is avoided, and the circulator is convenient to install and use.

With reference to fig. 1, the upper cavity 1 and the lower cavity 2 are symmetrically welded with 4 cooling fins 9, and 8 cooling fins 9 are perpendicular to the plane of the cavity. The radiating fins 9 are directly processed by adopting the upper cavity structure and the lower cavity structure, and the reserved holes 7 of the self-locking screws are correspondingly arranged at the radiating grooves formed at intervals, so that the operation during the installation of the circulator is facilitated.

As shown in fig. 3 and 2, 7 screw holes 8 are formed in the inner surface of the lower cavity 2, the screw holes 8 are distributed along the edge of the outer contour of the lower cavity 2, cooling fins 9 are used as check blocks, the cooling fins are arranged at intervals in sequence, and fastening screws 10 are installed in the screw holes 8, so that the whole upper cavity and the whole lower cavity are uniformly and tightly attached.

As shown in fig. 2, the upper cavity 1 is provided with a cavity hole 12, the connecting line of the cavity hole 12 and the center of the ferrite 5, the first permanent magnet 61, the second permanent magnet 62 and the matching block 11 is perpendicular to the planes of the upper cavity 1 and the lower cavity 2, the permanent magnet 6 is placed in the cavity hole 12 and separated from the outer surface of the cavity, and then a closed magnetic circuit is formed by connecting the magnetic circuit board 3, so that the magnetic leakage of the circulator is effectively reduced.

As shown in fig. 1, the fastening screw 10 and the self-locking screw 4 are respectively installed at two ends of the heat sink 9; and at least two radiating fins 9 are arranged between the adjacent self-locking screws 4, so that the circulator can directly radiate heat, and the use stability is maintained.

The working process of the utility model is as follows:

1) Placing two ferrites 5 on the matching blocks 11 of the upper cavity 1 and the lower cavity 2, placing a first permanent magnet 61 and a second permanent magnet 62 in the cavity holes 12 of the upper cavity 1 and the lower cavity 2, and aligning and attaching the upper cavity 1 and the lower cavity 2;

2) Clamping a U-shaped magnetic circuit board 3 on the two attached cavities, and wrapping the two ferrites 5, the first permanent magnet 61 and the second permanent magnet 62 inside the cavities and the cavity holes; 7 fastening screws 10 are arranged through the screw holes 8;

3) The riveting tube 41 is arranged in the reserved hole 7, the elastic pad 43 and the flat pad 44 are sleeved on the inner screw 42, and finally the riveting tube 41 is subjected to closing-up treatment, and the self-locking screw 4 is fixed;

4) The cooling fins 9 are arranged and installed at intervals at the positions of the reserved holes 7, and the cooling fins 9 are directly welded on the outer sides of the upper cavity 1 and the lower cavity 2 in a machining mode, so that installation is completed.

Claims (6)

1. The waveguide circulator with the self-locking screw comprises a waveguide circulator and the self-locking screw (4), and is characterized by comprising an upper cavity (1) and a lower cavity (2), wherein circular matching blocks (11) are processed on the inner sides of the upper cavity (1) and the lower cavity (2), and ferrite (5) is placed on the matching blocks (11); the outer sides of the upper cavity (1) and the lower cavity (2) are provided with cavity holes (12), a first permanent magnet (61) is arranged in the cavity holes (12) of the upper cavity, and a second permanent magnet (62) is arranged in the cavity holes (12) of the lower cavity; the upper cavity (1) is tightly attached to the lower cavity (2) through a fastening screw (10), the ferrite (5) is wrapped in a cavity formed by the upper cavity (1) and the lower cavity (2), and a U-shaped magnetic circuit board (3) is clamped on a cavity hole (12) at the outer side of the cavity; the self-locking screw (4) comprises a riveting tube (41), an inner screw (42), a spring pad (43) and a flat pad (44), and the self-locking screw (4) is arranged in a reserved hole (7) outside the cavity.

2. The waveguide circulator with the self-locking screw according to claim 1, wherein the rivet pipe (41) is placed in the reserved hole (7), an inner screw (42) is installed in the rivet pipe (41), and a spring pad (43) and a flat pad (44) are sequentially sleeved on the inner screw (42).

3. The waveguide circulator with the self-locking screw according to claim 1, wherein radiating fins (9) are symmetrically welded on the outer sides of the upper cavity (1) and the lower cavity (2), and the radiating fins (9) are perpendicular to the plane of the cavity.

4. A waveguide circulator with a self-locking screw according to claim 3, characterized in that the connecting line of the cavity hole (12) and the center of the ferrite (5), the first permanent magnet (61), the second permanent magnet (62) and the matching block (11) is vertical to the planes of the upper cavity (1) and the lower cavity (2).

5. The waveguide circulator with the self-locking screw according to claim 4, wherein screw holes (8) are formed in the upper cavity (1) and the lower cavity (2), the screw holes (8) are distributed along the contour edge of the cavity, and the fastening screw (10) is installed in the screw holes (8).

6. A waveguide circulator with a self-locking screw according to claim 3, characterized in that the fastening screw (10) and the self-locking screw (4) are located at both ends of the heat sink (9), respectively; and at least two radiating fins (9) are arranged between two adjacent self-locking screws (4).