阅读说明：本技术 一种高频大功率开关 (High-frequency high-power switch ) 是由 段先科 黄梦彬 曹佛清 付月生 聂补 张任 管思飏 徐剑 汪超 刘道钱 杨群 于 2020-12-18 设计创作，主要内容包括：本发明涉及开关领域,并提供了一种高频大功率开关,包括静触点、动触点、支撑座和升降装置,静触点、升降装置均固定在所述支撑座上；所述静触点的数量为两个以上,并且这些静触点上下布置；对于每个所述静触点而言,其各自包括接线板和两个簧片组件,两个所述簧片组件夹住所述接线板并且它们固定连接在一起；对于每个所述簧片组件而言,其各自包括簧片和两个压环,所述簧片包括支撑环和周向布置在所述支撑环上的若干触指；两个所述压环夹住所述支撑环并且它们固定连接在一起；所述升降装置与所述动触点连接,以用于带动动触点的上下运动,从而使所述动触点与所有的触指接触和分离。该高频大功率开关结构简单、成本低,适用于不同的高压场合。(The invention relates to the field of switches and provides a high-frequency high-power switch which comprises a fixed contact, a movable contact, a supporting seat and a lifting device, wherein the fixed contact and the lifting device are fixed on the supporting seat; the number of the static contacts is more than two, and the static contacts are arranged up and down; for each said stationary contact, each comprising a terminal plate and two spring members, said two spring members sandwiching said terminal plate and being fixedly connected together; for each spring assembly, each spring assembly comprises a spring and two pressing rings, wherein the spring comprises a supporting ring and a plurality of contact fingers circumferentially arranged on the supporting ring; the two compression rings clamp the support ring and are fixedly connected together; the lifting device is connected with the movable contact and used for driving the movable contact to move up and down, so that the movable contact is contacted with and separated from all the contact fingers. The high-frequency high-power switch has the advantages of simple structure and low cost, and is suitable for different high-voltage occasions.)

1. The utility model provides a high frequency high power switch, includes stationary contact, movable contact, supporting seat and elevating gear, its characterized in that:

the static contact and the lifting device are fixed on the supporting seat;

the number of the static contacts is more than two, and the static contacts are arranged up and down;

for each said stationary contact, each comprising a terminal plate and two spring members, said two spring members sandwiching said terminal plate and being fixedly connected together;

for each spring assembly, each spring assembly comprises a spring and two pressing rings, wherein the spring comprises a supporting ring and a plurality of contact fingers circumferentially arranged on the supporting ring; the two compression rings clamp the support ring and are fixedly connected together;

the lifting device is connected with the movable contact and used for driving the movable contact to move up and down, so that the movable contact is contacted with and separated from all contact fingers on the fixed contact.

2. The high-frequency high-power switch according to claim 1, wherein said supporting base comprises a supporting frame, a plurality of supporting rod groups and a plurality of supporting plates, said plurality of supporting rod groups are arranged in layers, each supporting rod group has a plurality of supporting rods vertically arranged, said supporting plates are also arranged in layers and connected through said supporting rods, each supporting plate is horizontally arranged, the supporting plate at the lowest layer is mounted on said supporting frame through said supporting rod group, said lifting device is mounted on said supporting frame, and each said stationary contact is mounted on one of said supporting plates.

3. The high frequency high power switch according to claim 1, wherein said contact finger is an S-shaped spring sheet formed by stamping.

4. The high frequency high power switch according to claim 1, wherein said movable contact is connected to said elevating means through a support for supporting said movable contact.

5. The high frequency high power switch according to claim 1, wherein said stationary contact further comprises a guide ring for guiding said movable contact during up and down movement.

6. The high frequency high power switch according to claim 1, wherein the contact fingers are subjected to a heat treatment to make the contact fingers have a predetermined elasticity.

7. The high-frequency high-power switch according to claim 1, wherein the contact finger is made of beryllium bronze, and the surface of the contact finger is plated with silver.

8. The high-frequency high-power switch according to claim 1, wherein the contact finger comprises a circular arc section, a straight section, a contact section and a tail section which are connected in sequence, the contact section is a part where a fixed contact is contacted with a movable contact, and the circular arc section of the contact finger is connected with the support ring.

9. The high frequency high power switch according to claim 8, wherein said straight line segment forms an angle θ with said support ring in the range of 45 ° ≦ θ < 90 °.

10. The high-frequency high-power switch according to claim 1, wherein said moving contact comprises an upper end cap, a metal tube and a lower end cap which are sequentially connected and fixed from top to bottom, and the material of said metal tube is red copper.

Technical Field

The invention belongs to the field of switches, and particularly relates to a high-frequency high-power switch.

Background

The high-frequency high-power switch is applied to high-voltage and high-frequency occasions such as a transmitter, and has the main functions of switching wave bands, short-circuiting coils, changing working states and the like in the transmitter. The high-frequency high-power switch mainly comprises a movable contact and a fixed contact, wherein the movable contact and the fixed contact determine voltage resistance, current density, contact resistance and the like, and are key parts of the high-frequency high-power switch.

The reed contact fingers in the fixed contact are in contact with the movable contact, and each contact acts as a bridge to enable the current to pass in a balanced mode. The existing contact finger structure comprises a plum-blossom contact finger, a Z-shaped contact finger, a watchband contact finger and a spring contact finger. The quincunx contact fingers are extruded or stamped parts, and are more in assembled parts and complex to assemble; the Z-shaped contact finger is an extrusion molding piece, the bending angle is large, and the manufacturing is difficult; compared with the plum-blossom-shaped contact finger, the watchband contact finger has the advantages of no need of a compression spring, simple structure, more contact points, strong conductive capability and the like, but has strict requirements on the heat treatment process of materials, high processing precision and relatively high cost; the spring contact finger is a novel contact finger structure, allows larger tolerance and error to appear on the design of a contact surface, has constant contact stress, small abrasion and long service cycle, and is widely applied to sliding point contact and dynamic and static contact equipment in high-voltage and extra-high voltage circuit breakers. The research on spring contact fingers in China starts late, and the current main problem in the research aspect is that the long-time current conducting capacity is still to be improved under the condition of the same overall dimension. The joule heat generated by the contact resistance of the contact fingers can soften or even weld the contact point material. And the elasticity of the contact finger is reduced due to the overhigh temperature rise, so that poor contact is caused, and the reliability of electric contact is influenced. Meanwhile, the high temperature degrades the insulating property of the material, and even an electrical breakdown or a circuit short-circuit phenomenon may occur.

Disclosure of Invention

In view of the above problems, the present invention provides a high-frequency high-power switch, which has good electrical properties, and the contact fingers have good elasticity and electrical properties, thereby avoiding the problem of heat generation caused by problems such as large resistance or poor contact, and thus being capable of satisfying the electrical requirements in practical use.

To achieve the above object, according to one aspect of the present invention, there is provided a high frequency high power switch including a stationary contact, a movable contact, a support base, and a lifting device, wherein:

the static contact and the lifting device are fixed on the supporting seat; the number of the static contacts is more than two, and the static contacts are arranged up and down;

for each said stationary contact, it includes a terminal plate and two spring members, the two spring members sandwiching the terminal plate and fixedly connected together;

for each spring assembly, each spring assembly comprises a spring and two pressing rings, wherein the spring comprises a supporting ring and a plurality of contact fingers circumferentially arranged on the supporting ring; the two compression rings clamp the support ring and are fixedly connected together;

the lifting device is connected with the movable contact and used for driving the movable contact to move up and down, so that the movable contact is contacted with and separated from all the contact fingers.

Preferably, the supporting seat comprises a supporting frame, a plurality of layers of supporting rod groups and a plurality of layers of supporting plates, the supporting rod groups are arranged in a vertical layer, each layer of supporting rod group is provided with a plurality of vertically arranged supporting rods, the supporting plates are also arranged in a vertical layer and connected through the supporting rods, each supporting plate is horizontally arranged, the supporting plate at the lowest layer is installed on the supporting frame through the supporting rod group, the lifting device is installed on the supporting frame, and each stationary contact is installed on one supporting plate respectively.

Preferably, the contact finger is an S-shaped elastic sheet formed by stamping.

Preferably, the movable contact is connected with the lifting device through a pillar for supporting the movable contact.

Preferably, the stationary contact further comprises a guide ring for guiding the movable contact during up and down movement.

Preferably, the contact fingers are subjected to heat treatment so that the elasticity of the contact fingers meets the set requirement.

Preferably, the material of the contact finger is beryllium bronze, and the surface of the contact finger is plated with silver.

Preferably, the contact finger comprises an arc section, a straight section, a contact section and a tail section which are connected in sequence, the contact section is a part where the fixed contact is in contact with the movable contact, and the arc section of the contact finger is connected with the support ring.

Preferably, the straight section forms an angle θ with the support ring in the range 45 ° ≦ θ < 90 °.

Preferably, the moving contact comprises an upper end cover, a metal tube and a lower end cover which are sequentially connected and fixed from top to bottom, and the metal tube is made of red copper.

In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:

(1) in the high-frequency high-power switch, the static contact and the lifting device are fixed on the supporting seat, the static contact is connected through the supporting rod, and the lifting device is connected with the movable contact through the supporting column. The up-and-down movement of the lifting device drives the movable contact to move, thereby realizing the on-off of the switch. The structure of the supporting column and the supporting column ensures that the whole high-frequency high-power switch has a simple structure. The static contact comprises an S-shaped contact finger, has simple structure, small volume and low cost, and is beneficial to batch production.

(2) According to the high-frequency high-power switch, the contact finger is subjected to heat treatment, so that the elasticity of the contact finger meets the set requirement, and the good contact between the fixed contact and the movable contact is ensured.

(3) The high-frequency high-power switch of the invention adopts beryllium bronze with good elastic property as the contact finger, and the surface of the contact finger is plated with silver. The contact finger has good elastic performance, can ensure the good contact between the fixed contact and the movable contact, and avoids the heating problem. The surface is plated with silver, so that the conductivity of the contact finger is enhanced, and the problem of reduction of elastic performance caused by heating is further avoided.

(4) The high-frequency high-power switch comprises a contact finger, a support ring and a contact ring, wherein the contact finger comprises an arc section, a straight section, a contact section and a tail section which are sequentially connected, and the arc section of the contact finger is fixed on the support ring. Through the connection of circular arc section and support ring, guarantee that the bottom of touching the finger has certain bending angle, avoid breaking because of external force is too big, improve the life-span of touching the finger.

(5) The high-frequency high-power switch comprises a movable contact, an upper end cover, a metal tube and a lower end cover, wherein the metal tube is made of metal copper, and the high-frequency high-power switch is simple in structure, easy to manufacture and good in conductivity.

(6) The invention relates to a reed of an S-shaped contact finger, which has the advantages of simple structure, small volume and low cost and is suitable for batch production. A high-frequency high-power switch is designed on the basis of a reed of an S-shaped contact finger, and the high-frequency high-power switch meets the electrical requirements through continuous research, design, test and improvement. The S-shaped contact finger has obvious improvement on the structure of the product, is an innovative structural form and produces good use and practical effects.

Drawings

FIG. 1 is an isometric view of a high frequency high power switch of the present invention;

FIG. 2 is a front view of the high frequency high power switch of the present invention;

fig. 3 is a partial cross-sectional view of the high frequency high power switch of the present invention;

FIG. 4 is a top view of the stationary contact shown in FIG. 1;

FIG. 5 is a cross-sectional view of the stationary contact shown in FIG. 1;

figure 6 is an isometric view of the reed of figure 5;

figure 7 is a top view of the reed of figure 5;

figure 8 is a side view of the reed of figure 5;

figure 9 is a cross-sectional view of the reed of figure 5;

figure 10 is an enlarged partial view of the S-shaped fingers of the reed of figure 9;

fig. 11 is a cross-sectional view of the inventive movable contact;

fig. 12 is a front view of the inventive lift.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 12, a high frequency high power switch includes a stationary contact 11, a movable contact 12, a supporting base, and a lifting device 15. The static contact 11 and the lifting device 15 are both fixed on the supporting seat; the supporting seat comprises a supporting frame 16, a plurality of layers of supporting rods 14 and a plurality of layers of supporting plates 45, wherein the plurality of layers of supporting rods 14 are arranged in an up-down layered mode, each layer of supporting rod 14 is provided with a plurality of vertically arranged supporting rods 14, the supporting plates 45 are also arranged in an up-down mode and are connected through the supporting rods 14, each supporting plate 45 is horizontally arranged, the supporting plate 45 at the lowest layer is installed on the supporting frame 16 through the supporting rods 14, the lifting device 15 is installed on the supporting frame 16, and each static contact 11 is installed on one supporting plate 45 respectively.

The supporting frame 16 and the supporting rod 14 are made of high-strength high-frequency insulating materials, such as polyethylene and epoxy resin, and both ends of the supporting frame 16 and the supporting rod 14 are of flange structures for fixed connection; the structure of backup pad 45 is for the outer side in the circle, and interior round circumference design has the through-hole to an installation that is used for stationary contact 11 has the flange mounting hole in 4 apex angle departments designs of backup pad 45 simultaneously, is used for supporting 14 fixed of stick. The use of such a hierarchical structure and materials makes the connection between the components more robust and facilitates maintenance and disassembly.

The number of the static contacts 11 is more than two, and the static contacts 11 are arranged up and down; for each of said stationary contacts 11, each of them comprises a terminal plate 44 and two spring members 49, said two spring members 49 sandwiching said terminal plate 44 and fixedly connected together; for each of said spring assemblies 49, each of which comprises a spring 43 and two press rings, the spring 43 comprises a support ring 52 and a plurality of contact fingers 51 circumferentially arranged on the support ring 52; the two press rings clamp a support ring 52, each of the stationary contacts 11 further comprises a guide ring 48, the guide rings 48 are outside the press rings and fixedly connected together for preventing point discharge and are fixed by copper hexagon head bolts and hexagon head nuts.

Wherein, wiring board 44 is for being used for electrically conductive outer square inner circle structure, but also can unilateral connect, and wiring board 44's form is comparatively various, and the material is red copper, and surface silver-plating is handled, processes threaded through-hole on the wiring board 44 for fixed binding post. The reed 43 is made of beryllium bronze with good elasticity, and the surface of the reed is plated with silver to enhance the conductivity; the contact finger 51 is an S-like spring piece formed by press forming, and in order to ensure the elasticity of the contact finger 51, heat treatment is performed after press forming, and the contact finger 51 of the spring piece 43 faces upward when mounting. The guide ring 48 is used for guiding the moving contact 12 in the up-and-down movement process, and is made of a high-strength high-frequency insulating material, such as polyethylene and epoxy resin, and is circumferentially provided with through holes. The first pressure ring 41 is of an annular structure for conducting electricity, is made of red copper, is subjected to surface tinning treatment, and is circumferentially provided with a screw blind hole; the second pressing ring 42 is of an annular structure used for conducting electricity, is made of red copper, is subjected to surface tin plating treatment, is provided with a counter bore in the circumferential direction, and is matched with the first pressing ring 41 to be installed and fixed.

Further, the contact finger 51 comprises an arc section 74, a straight section 73, a contact section 72 and a tail section 71, which are connected in sequence, the contact section 72 is a part where the fixed contact 11 contacts with the movable contact 12, the arc section 74 of the contact finger 51 is connected with the support ring 52, wherein an angle formed by the straight section 73 and the support ring 52 is theta, and the range of the angle is 45^°≤θ＜90^°。

The wiring board 44, the press ring and the like are made of red copper, and further, the contact finger 51 is provided with the arc section 74, so that the contact pressure between the contact finger 51 and the movable contact 12 is ensured, and the on-resistance is reduced. The reduction in resistance reduces joule heating and increases the life of the finger 51.

During operation, the contact section 72 of the contact finger 51 is in contact with the movable contact 12. In order to ensure that the contact finger 51 has sufficient elasticity, the root fillet R of the contact finger 51 is increased as much as possible on the premise of ensuring the inner diameter D in the design process, the inner diameter D of the reed 43 and the outer diameter D of the contact section 72, the number of the contact fingers 51 and the inclination angle theta are determined according to the requirements of contact resistance, and heat treatment is performed to ensure the elasticity of the contact finger 51 when the reed 43 is processed. The good elasticity of the contact finger 51 is beneficial to ensuring the good contact between the fixed contact 11 and the movable contact 12, thereby reducing the on-resistance.

The elevating device 15 is connected to the moving contact 12 for moving the moving contact 12 up and down, thereby contacting and separating the moving contact 12 with and from all the contact fingers 51. Further, the movable contact 12 is connected with the elevating means 15 through a pillar 13 for supporting the movable contact 12.

The length L of movable contact 12 is determined according to the distance between stationary contacts 11, ensuring that the upper and lower ends of the copper core are in contact with the spring 43 in stationary contact 11, and ensuring that movable contact 12 is coaxial with spring 43 in stationary contact 11. The movable contact 12 is formed by welding an upper end cover 81, a metal pipe 82 and a lower end cover 83, wherein the metal pipe 82 is made of red copper; the upper end cover 81 is connected with the upper end 31 of the movable contact, the outer diameter D of the movable contact 12 of the lower end cover 83 and the lower end 32 of the movable contact is determined according to the inner diameter D of the free state of the reed 43, the compression amount of the contact finger 51 of the reed 43 is controlled, the contact resistance is ensured to be in a required range, meanwhile, the finish degree of the outer surface of the copper core is ensured, and a flange mounting threaded hole is designed on the lower end cover 83.

The lifting device 15 is composed of a screw nut movement mechanism 101, a speed reducer 102 and a motor, a flange on the screw nut movement mechanism 101 fixes the movable contact 12 through a support 13, the motor drives the movable contact 12 fixed on the screw nut movement mechanism 101 to move up and down through the speed reducer 102, the stroke of the lifting device 15 is determined according to the types (single-pole single-throw and single-pole double-throw) of the high-frequency high-power switch, and the motor is provided with a non-magnetic shielding cover to prevent the motor from generating heat in the high-frequency high-power environment. The load of the elevating device 15 is determined by calculation based on the weight of the movable contact 12 and the frictional force during the up-and-down movement. The material of the support post 13 adopts high-strength high-frequency insulating material, such as polyethylene and epoxy resin, so as to further ensure the fastening of the connection.

The lead screw nut movement mechanism 101 mainly converts rotational movement into linear movement or converts linear movement into rotational movement, and in the present invention, the rotational movement of the lead screw nut is converted into linear movement of the movable contact 12, thereby controlling the contact between the movable contact 12 and the stationary contact 11. The screw nut motion mechanism 101 has the characteristic of stable rotation, can well control the up-and-down motion of the screw, thereby driving the up-and-down motion of the movable contact 12 connected by the support 13, and has better stability.

The controller 17 is used for controlling the ascending and descending of the lifting device 15, and the controller 17 is laterally hung on the supporting frame 16. The motor 103 is fixed on the support frame for driving the lead screw nut movement mechanism 101.

It is to be understood that the foregoing are many different embodiments or examples of the different features of the present embodiments. Specific examples of components and arrangements are described above to simplify the illustrative embodiments.

These are, of course, merely examples and are not intended to limit the embodiments, and for example, device dimensions are not limited to the ranges or values disclosed, but may be determined by process conditions or by desired properties of the device. Such as the inner circle diameter D of the contact section 72, the radius R of the arc segment of the contact finger 51, the length L of the metal tube 82 of the movable contact 12 and the diameter D thereof, etc., can be determined according to the actual situation.

Moreover, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include additional features that may be formed in embodiments interposing the first and second features, such that the first and second features may not be in direct contact, although the various features may be drawn arbitrarily to varying proportions for the sake of brevity and clarity. Such as the support plate 45 at the lowest end of the support base, can be connected to the support base by the support rod 14, or can be directly fixed to the support frame 16.

Spatially relative terms, such as "under," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be oriented in different ways (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.