High-power anti-breakdown microwave waveguide short circuit device

Abstract

The invention belongs to the technical field of microwave transmission, and particularly relates to a high-power anti-breakdown microwave waveguide short-circuit device which comprises a waveguide shell, a short-circuit piston is arranged in the waveguide shell in a sliding mode, through installation grooves are formed in the four surfaces, corresponding to the inner wall of the waveguide shell, of the short-circuit piston respectively, and an elastic piece is fixedly connected in each installation groove. Two roller pin bearing areas are symmetrically distributed on each elastic piece, roller pins are respectively connected in the two roller pin bearing areas on each elastic piece in a rolling manner, each roller pin is in rolling contact with the inner wall of the waveguide shell, the elastic pieces and the roller pins are made of conductive materials, the elastic pieces have elasticity, and the elastic pieces are made of conductive materials. The gap between the waveguide shell and the short-circuit piston is filled with the elastic piece and the roller pin, microwave loss and discharge breakdown are avoided, the roller pin makes rolling contact with the waveguide shell, the friction force between the short-circuit piston and the waveguide shell is reduced, abrasion is reduced, the service life is prolonged, and the position of the short-circuit piston can be conveniently, accurately and rapidly adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave transmission, and in particular relates to a high-power anti-breakdown microwave waveguide short-circuit device. Background Art

[0002] Microwaves refer to electromagnetic waves in the range of 300MHz to 300GHz. Currently, microwaves are usually transmitted by waveguides. Waveguides are transmission devices unique to microwave systems. They are usually hollow metal tubes with very smooth inner walls or other waveguide devices of other shapes. They can transmit microwave signals from one place to another, such as from a microwave generator to an antenna, or from one component to another in a microwave circuit. Traditional microwave transmission using cables, capacitors, etc. is only suitable for the transmission of electromagnetic waves below 300MHz. The use of microwave waveguides can reduce signal loss and can handle high-power microwave signals, thereby replacing the original dual-core or cable, capacitor, inductor and other microwave transmission methods.

[0003] Common waveguide types include rectangular waveguides, circular waveguides, etc. Here, a rectangular waveguide is taken as an example. When a microwave signal enters the waveguide, the electromagnetic wave will be reflected on the smooth inner wall of the rectangular waveguide shell and propagate along the length direction of the waveguide shell. In order to adjust the propagation condition of the electromagnetic wave, it is necessary to provide a sliding short-circuit piston with an adjustable position in the waveguide shell. When the short-circuit piston slides to a specific position, it can form a short circuit with the inner wall of the waveguide shell. When the electromagnetic wave in the waveguide shell encounters a short circuit, based on the reflection characteristics of the electromagnetic wave under the short-circuit condition, the electromagnetic wave will undergo total reflection, thereby achieving the purpose of adjusting microwave transmission.

[0004] Ideally, the sliding short-circuit piston needs to be in complete fit and contact with the inner wall of the waveguide shell to achieve a good short-circuit effect. However, since the short-circuit piston needs to be slidable and adjustable, and the existing processing accuracy cannot meet the ideal state, a gap will inevitably appear between the short-circuit piston and the inner wall of the waveguide shell. During high-power microwave transmission, an extremely high current flows through the waveguide shell and the short-circuit piston, and the current cannot be conducted between the waveguide shell and the short-circuit piston in the gap, causing discharge breakdown and sparking at the gap, resulting in damage to the waveguide components. In addition, since there is no good contact between the waveguide shell and the short-circuit piston at the gap, the short-circuit effect is poor, which will cause partial leakage and microwave loss.

[0005] In actual use, the existing solution is to set an elastic contact piece around the short-circuit piston to fill the gap between the waveguide shell and the short-circuit piston, so that the waveguide shell and the short-circuit piston have good contact to achieve short-circuit, avoid microwave loss, and reduce discharge breakdown.

[0006] A Chinese patent with authorization announcement number CN111682294B discloses a microwave sliding short-circuit piston with a choke structure, which states that since the short-circuit piston often slides in the waveguide shell, the elastic contact piece rubs against the inner wall during the sliding process, causing the elastic contact piece to be worn, having a short service life and requiring frequent replacement, and increasing the sliding resistance of the short-circuit piston in the waveguide shell, making it inconvenient to accurately adjust the position of the short-circuit piston. Therefore, this invention forces the short-circuit piston to be in a suspended state at all times, so that the short-circuit piston does not contact the inner wall of the waveguide shell, and further, the short-circuit piston does not scratch the inner wall of the waveguide shell during linear motion, thereby making the sliding resistance and contact resistance of the short-circuit piston sliding in the waveguide shell smaller.

[0007] However, the above patent still has the following disadvantages:

[0008] 1. Since the short-circuit piston does not contact the inner wall of the waveguide shell, there is always a gap between the short-circuit piston and the waveguide shell, and good short-circuit contact cannot be achieved. The problems of microwave loss and discharge breakdown cannot be avoided. In order to ensure good short-circuit contact, it is still necessary to fill the gap between the short-circuit piston and the waveguide shell with conductive material. In this case, the effect of reducing sliding resistance of the above patent cannot be guaranteed.

[0009] 2. After long-term use, the above-mentioned patent will inevitably cause wear between the various parts, especially between the linear bearing and the light rod, and between the lead screw and the nut in the above-mentioned patent, and then the problem of looseness will occur. In order to reduce microwave loss, the above-mentioned patent needs to control the gap within a very small range. Even if there is a slight looseness, the short-circuit piston will still scratch the waveguide shell, resulting in increased sliding resistance.

[0010] 3. In order to ensure that the short-circuit piston always remains in a suspended state, the above patent requires extremely high processing accuracy between the various components, which indirectly increases the difficulty of processing and production and increases labor costs. Summary of the invention

[0011] In order to overcome the deficiencies of the prior art, the present invention solves the technical problem of providing a spring sheet and a needle roller to fill the gap between the waveguide housing and the short-circuit piston, so that good short-circuit contact is achieved between the short-circuit piston and the waveguide housing, and electromagnetic waves can be completely reflected. Moreover, since the spring sheet and the needle roller can conduct the current between the waveguide housing and the short-circuit piston, the discharge breakdown effect caused by the current blockage between the waveguide housing and the short-circuit piston gap is effectively reduced. The needle roller is connected with the spring sheet in a rolling manner. When the short-circuit piston slides in the waveguide housing, the needle roller rolls on the inner wall of the waveguide housing, which effectively reduces the friction resistance, thereby reducing the resistance when adjusting the position of the short-circuit piston, and facilitating The short-circuit position of the short-circuit piston can be adjusted accurately and quickly, and even if wear occurs between the needle roller and the spring sheet, the needle roller can still maintain good short-circuit contact with the inner wall of the waveguide shell, and effectively improve the service life of the device. The bottom of the folded support area can be against the bottom side of the mounting groove to provide support force to prevent the center of the spring sheet from being suspended in the air, so that the spring sheet can maintain sufficient support force to avoid gaps and stably press the needle roller against the inner wall of the waveguide shell to ensure the short-circuit contact effect. The processing accuracy requirements of the needle roller and the spring sheet themselves are not high, and the processing technology is simple and the processing difficulty is low, so that the overall processing and production cost of the device can be controlled within an appropriate range, which is convenient for production and wide promotion and use.

[0012] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a high-power anti-breakdown microwave waveguide short-circuit device, comprising:

[0013] A waveguide housing, wherein a short-circuit piston is slidably arranged in the waveguide housing, and mounting grooves are respectively provided on four surfaces of the short-circuit piston corresponding to the inner wall of the waveguide housing;

[0014] A spring sheet, each of the mounting grooves is fixedly connected with a spring sheet, each of the spring sheets is rollingly connected with a needle roller, and each of the needle rollers can contact and roll relatively with the inner wall of the waveguide housing;

[0015] The spring sheet and the roller needle are made of conductive material, the spring sheet is elastic, and the short-circuit piston, the spring sheet and the roller needle can cover the inner cross-section of the waveguide housing.

[0016] Furthermore, each of the spring sheets is rollingly connected to two roller needles, each of the spring sheets is provided with a roller needle bearing area at the corresponding position of each roller needle, each of the spring sheets is provided with a folding support area between the two roller needle bearing areas, and each of the spring sheets is provided with conductive connection areas at both side edges that fit tightly with the short-circuit piston.

[0017] Furthermore, a group of buckle plates are fixedly connected on both sides of each mounting groove, each roller needle fits tightly with the corresponding buckle plate surface and rolls relatively, and the bottom edge of each buckle plate fits tightly with the conductive connection area of ​​the corresponding spring plate.

[0018] Furthermore, the surface of each of the buckles that contacts the roller needle and the spring sheet is coated with a conductive coating.

[0019] Furthermore, a plurality of elastic rings are arranged in the installation groove, and each of the elastic rings is tightly fitted with the needle bearing area of ​​the spring sheet.

[0020] Furthermore, one end of the waveguide shell is fixedly connected to an end cover, and two screw seats are fixedly connected to the side of the short-circuit piston close to the end cover, a screw is rotatably connected between the two screw seats, the screw passes through the end cover and is meshingly connected to the end cover for transmission connection, the end of the screw away from the short-circuit piston is fixedly connected to a handwheel, and a locking nut is threadedly connected to the outer side of the screw.

[0021] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) By arranging spring sheets and roller needles to fill the gap between the waveguide housing and the short-circuit piston, good short-circuit contact is achieved between the short-circuit piston and the waveguide housing, which can completely reflect the electromagnetic waves. In addition, since the spring sheets and roller needles can conduct the current between the waveguide housing and the short-circuit piston, the discharge breakdown effect caused by the lack of current between the waveguide housing and the short-circuit piston can be effectively reduced.

[0023] (2) The needle roller is connected to the spring sheet by rolling. When the short-circuit piston slides in the waveguide housing, the needle roller rolls on the inner wall of the waveguide housing, effectively reducing the friction resistance, thereby reducing the resistance when adjusting the position of the short-circuit piston, making it convenient to accurately and quickly adjust the short-circuit position of the short-circuit piston. Even if wear occurs between the needle roller and the spring sheet, the needle roller can still maintain good short-circuit contact with the inner wall of the waveguide housing, thereby effectively increasing the service life of the device.

[0024] (3) The bottom of the folded support area can be pressed against the bottom side of the mounting groove to provide support force, thereby preventing the center of the spring sheet from being suspended in the air. This allows the spring sheet to maintain sufficient support force to avoid gaps and stabilize the roller needle against the inner wall of the waveguide shell to ensure a short-circuit contact effect.

[0025] (4) The machining accuracy requirements of the needle roller and the spring sheet are not high, and the machining process is simple and the machining difficulty is low, so that the overall machining and production cost of the device can be controlled within an appropriate range, which is convenient for production and wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional schematic diagram of this patent.

[0027] Figure 2 This is a top view of the patent.

[0028] Figure 3 for Figure 2Stereoscopic cross-sectional view at AA in the middle.

[0029] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0030] Figure 5 This is a schematic diagram of the internal structure of this patent.

[0031] Figure 6 for Figure 5 A partial enlarged view of point C in the middle.

[0032] Figure 7 This is a schematic diagram of the structure of the spring piece and the roller needle of this patent.

[0033] Figure 8 for Figure 2 Stereoscopic cross-sectional view at DD in the middle.

[0034] Explanation of the reference numerals: waveguide housing 10; end cover 11; screw 12; hand wheel 13; locking nut 14; screw seat 15; short-circuit piston 16; mounting groove 17; buckle plate 18; conductive coating 19; spring sheet 20; conductive connection area 21; needle bearing area 22; folding support area 23; needle roller 30; elastic ring 31. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] Embodiment 1:

[0037] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, a high-power anti-breakdown microwave waveguide short-circuit device comprises a waveguide housing 10, a short-circuit piston 16 is slidably arranged in the waveguide housing 10, and through mounting grooves 17 are respectively provided on four surfaces corresponding to the inner wall of the waveguide housing 10 of the short-circuit piston 16, a spring 20 is fixedly connected in each mounting groove 17, two needle bearing areas 22 are symmetrically arranged on each spring 20, and needle rollers 30 are respectively rollingly connected in the two needle bearing areas 22 on each spring 20, and each needle roller 30 is in rolling contact with the inner wall of the waveguide housing 10, and the spring 20 and the needle roller 30 are made of conductive material. In this embodiment, the spring 20 and the needle roller 30 are preferably made of copper, and the spring 20 is elastic.

[0038] By providing the spring piece 20 and the needle roller 30, the gap between the waveguide housing 10 and the short-circuit piston 16 can be filled, and the current can be conducted, so that a good short-circuit contact is achieved between the short-circuit piston 16 and the waveguide housing 10, and the electromagnetic waves can be completely reflected. In addition, since the spring piece 20 and the needle roller 30 can conduct the current between the waveguide housing 10 and the short-circuit piston 16, the discharge breakdown effect caused by the lack of current between the waveguide housing 10 and the short-circuit piston 16 is effectively reduced.

[0039] Furthermore, since the needle roller 30 is rollingly connected to the spring sheet 20, the needle roller 30 rolls on the inner wall of the waveguide housing 10 during the sliding process of the short-circuit piston 16 in the waveguide housing 10, thereby effectively reducing the friction resistance, thereby reducing the resistance when adjusting the position of the short-circuit piston 16, and facilitating accurate and rapid adjustment of the short-circuit position of the short-circuit piston 16. Furthermore, the elasticity of the spring sheet 20 is utilized to keep the needle roller 30 pressed against the inner wall of the waveguide housing 10 at all times. Even if wear occurs between the needle roller 30 and the spring sheet 20, the needle roller 30 can still contact the inner wall of the waveguide housing 10, thereby ensuring a good short-circuit contact effect and effectively improving the service life of the device.

[0040] By arranging two roller needles 30 on each spring piece 20, two short-circuit connection positions are provided, which improves the current conduction effect. At the same time, even if one of the roller needles 30 cannot effectively contact the inner wall of the waveguide housing 10 to fill the gap, the other roller needle 30 can still provide a good short-circuit contact effect, which plays a double insurance role and ensures the good working effect of the device when it is working.

[0041] like Figure 4 , Figure 6 and Figure 7 As shown, conductive connection areas 21 for conductive contact with the short-circuit piston 16 are provided on both side edges of each spring piece 20, and a group of mutually symmetrical buckle pieces 18 are fixedly connected on both sides of each mounting groove 17, and each buckle piece 18 is rollingly connected with a corresponding needle roller 30. A folding support area 23 is provided in the middle of two needle roller bearing areas 22 of each spring piece 20, and each folding support area 23 and a corresponding group of buckle pieces 18 can buckle the corresponding needle roller 30 in the needle roller bearing area 22.

[0042] By setting the conductive connection area 21, the spring 20 can make good conductive contact with the short-circuit piston 16, thereby ensuring the short-circuit contact effect and current conduction effect between the short-circuit piston 16 and the waveguide housing 10, and by setting the buckle 18 and the folding support area 23, the needle roller 30 can be stably restricted in the needle roller bearing area 22 to prevent the needle roller 30 from being out of contact with the spring 20 during the rolling process, thereby ensuring the short-circuit contact effect and current conduction effect, and the bottom of the folding support area 23 can be against the bottom side of the mounting groove 17 to provide supporting force to prevent the center of the spring 20 from being suspended in the air, thereby enabling the spring 20 to maintain sufficient supporting force to avoid the generation of gaps, and stably press the needle roller 30 against the inner wall of the waveguide housing 10 to ensure the short-circuit contact effect.

[0043] like Figure 4 , Figure 6 and Figure 7 As shown, the surface of each buckle 18 in contact with the needle roller 30 and the spring sheet 20 is coated with a conductive coating 19. In this embodiment, the conductive coating 19 is preferably a DLC coating, i.e., a diamond-like carbon coating. A plurality of elastic rings 31 are arranged in the mounting groove 17. Each elastic ring 31 is tightly fitted with the needle roller bearing area 22 of the spring sheet 20. In this embodiment, the elastic ring 31 is preferably made of polytetrafluoroethylene. Optionally, the outer side of the elastic ring 31 is coated with a DLC coating.

[0044] The low friction coefficient and wear resistance of the DLC coating are utilized to reduce the friction and wear between the needle roller 30 and the buckle plate 18, thereby increasing the service life of the device.

[0045] In the actual working process, since a large current flows through the spring piece 20 and the needle roller 30, the spring piece 20 and the needle roller 30 generate heat. By utilizing the excellent thermal conductivity of the DLC coating, the heat of the spring piece 20 and the needle roller 30 can be efficiently transferred to the short-circuit piston 16, reducing the heat concentration in the spring piece 20 and the needle roller 30, thereby reducing the problem that the spring piece 20 is difficult to provide support and elastic force to the needle roller 30 due to high temperature softening. Moreover, even if the spring piece 20 is difficult to provide support and elastic force due to high temperature softening, the elastic ring 31 can be provided to resist the spring piece 20 to supplement the elasticity of the spring piece 20 and provide support, thereby ensuring that the needle roller 30 is always in good short-circuit contact with the inner wall of the waveguide housing 10.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, one end of the waveguide housing 10 is fixedly connected to an end cover 11, and two screw seats 15 are fixedly connected to the side of the short-circuit piston 16 close to the end cover 11, a screw 12 is rotatably connected between the two screw seats 15, the screw 12 passes through the end cover 11 and is meshed and transmission-connected with the end cover 11, and the end of the screw 12 away from the short-circuit piston 16 is fixedly connected to a handwheel 13, and a locking nut 14 is threadedly connected to the outer side of the screw 12.

[0047] By providing the end cover 11 and the screw rod 12, the position of the short-circuit piston 16 can be stably and accurately adjusted by rotating the screw rod 12, and by providing the locking nut 14, the screw rod 12 can be locked after the position of the short-circuit piston 16 is adjusted, thereby locking the position of the short-circuit piston 16.

[0048] In this embodiment, initially, the operator sets the device on the microwave transmission line and rotates the screw rod 12 by turning the hand wheel 13. Due to the threaded connection between the screw rod 12 and the end cover 11, the screw rod 12 drives the short-circuit piston 16 to move in the length direction of the waveguide housing 10 to adjust the position.

[0049] During the process of adjusting the position of the short-circuit piston 16, the needle roller 30 rolls on the inner wall surface of the waveguide housing 10, and the elasticity of the spring 20 is used to stably press the needle roller 30 against the inner wall surface of the waveguide housing 10, so that the needle roller 30 can always be in short-circuit contact with the inner wall of the waveguide housing 10. In addition, during this process, there is rolling friction between the needle roller 30 and the waveguide housing 10, which reduces the friction between the short-circuit piston 16 and the waveguide housing 10, does not hinder and affect the position adjustment of the short-circuit piston 16, and facilitates accurate adjustment of the short-circuit piston 16.

[0050] After the position of the short-circuit piston 16 is adjusted, the operator screws the locking nut 14 until the locking nut 14 is tightly in contact with the surface of the end cover 11 to lock the screw rod 12, thereby locking the short-circuit piston 16 in the short-circuit position.

[0051] During operation, electromagnetic waves enter the waveguide housing 10, are continuously reflected by the inner wall of the waveguide housing 10 and propagate along the length direction of the waveguide housing 10. Since the spring piece 20 and the roller needle 30 fill the gap between the short-circuit piston 16 and the waveguide housing 10, a sufficiently good short-circuit connection is established between the short-circuit piston 16 and the waveguide housing 10. The electromagnetic waves will be completely reflected by the short-circuit piston 16, the spring piece 20 and the roller needle 30, thereby avoiding microwave leakage and reducing microwave loss.

[0052] At the same time, a very large current flows through the short-circuit piston 16 and the waveguide housing 10. Since the spring piece 20 and the needle roller 30 fill the gap between the waveguide housing 10 and the short-circuit piston 16 and effectively conduct the current between the waveguide housing 10 and the short-circuit piston 16, the voltage difference between the waveguide housing 10 and the short-circuit piston 16 is prevented from being too large, resulting in the electric field strength between the waveguide housing 10 and the short-circuit piston 16 exceeding the dielectric strength of the air, thereby avoiding discharge breakdown and electric sparking, and further preventing the internal components of the short-circuit device from being damaged by electric sparks.

[0053] In actual scenarios, due to the limited processing accuracy of the waveguide shell 10 and the short-circuit piston 16, the surface of the waveguide shell 10 cannot achieve the theoretically completely flat and smooth surface, and the aspect ratio of the needle roller 30 is extremely large. Therefore, within the range of the entire needle roller 30, a part of the needle roller 30 is prone to not being able to completely and tightly contact with the inner wall of the waveguide shell 10, thereby generating a gap that affects the short-circuit contact effect between the waveguide shell 10 and the short-circuit piston 16, and is prone to microwave loss and discharge breakdown.

[0054] By arranging two needle rollers 30 on each spring piece 20 and the two needle rollers 30 are arranged front and back along the length direction of the waveguide shell 10, a double insurance effect is achieved. Even if a part of the needle roller 30 close to the microwave source is not in close contact with the inner wall of the waveguide shell 10 to fill the gap, the other needle roller 30 can still provide good short-circuit contact between the short-circuit piston 16 and the waveguide shell 10, and no microwave loss and discharge breakdown will occur.

[0055] In the existing method for solving the discharge breakdown problem, an elastic contact piece is provided between the waveguide shell 10 and the short-circuit piston 16 to fill the gap. In the process of continuously adjusting the position of the short-circuit piston 16, the elastic contact piece and the inner wall of the waveguide shell 10 are constantly rubbed against each other, which may cause the elastic contact piece to wear and fail. The method of using a roller needle 30 can withstand greater wear than the traditional elastic contact piece, and the wear on the roller needle 30 is further reduced by coating the conductive coating 19. Two roller needles 30 are provided on each spring piece 20, thereby achieving the effect of increasing the service life of the device.

[0056] During operation, since a very large current flows through the waveguide shell 10 and the short-circuit piston 16, a very large current also flows through the elastic contact sheet when the gap is filled with the traditional elastic contact sheet, which can easily cause the elastic contact sheet to generate high temperature and soften, thereby reducing the supporting capacity of the elastic contact sheet. The short-circuit piston 16 will sink downward under the action of gravity, which can easily cause the elastic contact sheet above the short-circuit piston 16 to lose contact with the inner wall of the waveguide shell 10 and form a gap.

[0057] By applying the conductive coating 19, the heat on the needle roller 30 and the spring 20 can be efficiently transferred to the short-circuit piston 16, thereby avoiding heat concentration in the spring 20 and the needle roller 30, thereby reducing the softening of the spring 20. In addition, by setting the folded support area 23 to resist the bottom side of the mounting groove 17, the middle position of the spring 20 can be avoided from being suspended in the air, which can improve the overall structural strength of the spring 20, reduce the impact of the softening of the spring 20 on the supporting capacity, and ensure that the needle roller 30 is always in good contact with the inner wall of the waveguide housing 10. At the same time, even if the spring 20 softens, the supporting force and elastic force of the spring 20 can be supplemented by setting the elastic ring 31, thereby effectively avoiding the problem of gaps caused by softening or insufficient supporting force and elastic force.

[0058] Since the needle roller 30 contacts the waveguide housing 10 by pressing against the inner wall of the waveguide housing 10 through the elasticity of the spring sheet 20, the processing accuracy of the waveguide housing 10 and the short-circuit piston 16 does not need to be too high, so as to ensure that the needle roller 30 and the waveguide housing 10 maintain good contact. The processing accuracy requirements of the needle roller 30 and the spring sheet 20 themselves are not high, and the processing technology is simple and the processing difficulty is low, so that the overall processing and production cost of the device can be controlled within an appropriate range, which is convenient for production and wide promotion and use.

[0059] Embodiment 2:

[0060] In this embodiment, Figure 8 As shown, the ends of the spring pieces 20 and the roller needle 30 on the upper and lower sides of the short-circuit piston 16 are respectively in contact with the inner walls of the left and right sides of the waveguide housing 10, and the ends of the spring pieces 20 and the roller needle 30 on the left and right sides of the short-circuit piston 16 are respectively in contact with the spring pieces 20 on the upper and lower sides of the short-circuit piston 16, thereby fully filling the gap between the waveguide housing 10 and the short-circuit piston 16, and still providing good short-circuit contact at the corners of the inner wall of the rectangular waveguide housing 10, thereby reducing microwave loss and breakdown discharge at the corners of the rectangular waveguide housing 10.

[0061] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0062] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0063] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A high-power anti-breakdown microwave waveguide short-circuit device, characterized in that: The high-power anti-breakdown microwave waveguide short-circuit device comprises: A waveguide housing (10), wherein a short-circuit piston (16) is slidably disposed in the waveguide housing (10), and mounting grooves (17) are respectively provided on four surfaces of the short-circuit piston (16) corresponding to the inner wall of the waveguide housing (10); A spring sheet (20), each of the mounting grooves (17) being fixedly connected with a spring sheet (20), each of the spring sheets (20) being rollingly connected with a rolling needle (30), each of the rolling needles (30) being able to contact and roll relatively with the inner wall of the waveguide housing (10); The spring sheet (20) and the roller needle (30) are made of conductive material, the spring sheet (20) is elastic, and the short-circuit piston (16) and the spring sheet (20) and the roller needle (30) can cover the inner cross section of the waveguide housing (10).

2. A high-power anti-breakdown microwave waveguide short-circuit device according to claim 1, characterized in that: Two roller needles (30) are rollingly connected to each of the spring sheets (20); a roller needle bearing area (22) is provided on each of the spring sheets (20) at a position corresponding to each of the roller needles (30); a folding support area (23) is provided on each of the spring sheets (20) between the two roller needle bearing areas (22); and conductive connection areas (21) that are tightly fitted with the short-circuit piston (16) are provided on both side edges of each of the spring sheets (20).

3. A high-power anti-breakdown microwave waveguide short-circuit device according to claim 2, characterized in that: A group of buckle plates (18) are fixedly connected to both sides of each mounting groove (17), each roller needle (30) is tightly fitted with the surface of the corresponding buckle plate (18) and rolls relative to it, and the bottom edge of each buckle plate (18) is tightly fitted with the conductive connection area (21) of the corresponding spring plate (20).

4. A high-power anti-breakdown microwave waveguide short-circuit device according to claim 3, characterized in that: The surface of each buckle plate (18) that contacts the roller needle (30) and the elastic sheet (20) is coated with a conductive coating (19).

5. A high-power anti-breakdown microwave waveguide short-circuit device according to claim 2, characterized in that: A plurality of elastic rings (31) are arranged in the installation groove (17), and each of the elastic rings (31) is tightly fitted with the needle bearing area (22) of the spring sheet (20).

6. A high-power anti-breakdown microwave waveguide short-circuit device according to claim 1, characterized in that: One end of the waveguide housing (10) is fixedly connected to an end cover (11); one side of the short-circuit piston (16) close to the end cover (11) is fixedly connected to two screw seats (15); a screw (12) is rotatably connected between the two screw seats (15); the screw (12) passes through the end cover (11) and is meshed and transmission-connected with the end cover (11); one end of the screw (12) away from the short-circuit piston (16) is fixedly connected to a hand wheel (13); and a locking nut (14) is threadedly connected to the outer side of the screw (12).

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