Non-contact waveguide short circuit breaker

Abstract

The present invention discloses a non-contact waveguide short-circuit device, which includes a piston body and a circular waveguide. One end of the piston body forms a short-circuit surface. The other end of the piston body is inserted into the circular waveguide through one end of the circular waveguide, and there is a gap between the outer wall surface of the piston body and the inner wall surface of the circular waveguide. The piston body is connected with a tuning device, and the tuning device can drive the piston body to move horizontally in the circular waveguide, so as to adjust the position of the short-circuit surface relative to the circular waveguide. Since there is no direct contact between the piston body and the circular waveguide to form a non-contact waveguide short-circuit device, the movement of the piston body in the circular waveguide is not restricted, it is easy to achieve precise control of the position of the piston body, and the piston body will not be worn. In addition, the tuning device can adjust the insertion depth of the short-circuit surface in the circular waveguide synthesizer, so as to conveniently adjust the position of the short-circuit surface in the waveguide cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of waveguide short - circuit devices, and particularly to a non - contact waveguide short - circuit device. Background Art

[0002] A waveguide short - circuit device is a component in a microwave system, whose main function is to reflect all electromagnetic energy back. It is also known as a short - circuit load or a total - reflection terminator. Waveguide short - circuit devices are divided into two categories: contact type and non - contact type.

[0003] In a contact short - circuit device, elastic sheets with cut grooves on two wide sides of the short - circuit piston end block and forming many fine claws, such as phosphor bronze, beryllium bronze, high - quality elastic steel sheets plated with silver or copper, etc., are used to make the contact closer. In a non - contact short - circuit device, there is a very small gap between the outer surface of the piston and the waveguide. The characteristic impedance is Z′c, and the characteristic impedance of the original coaxial line is Zc. According to the transmission - line theory, if Z′c << Zc, the impedance presented at the equivalent short - circuit plane is very small, approximately equal to a short - circuit.

[0004] In a high - power waveguide synthesizer, a multi - path high - power waveguide synthesizer synthesizes the power generated by multiple solid - state power transmitting components. The synthesized high - power is output to a coaxial - line device and then coupled and converted to an output waveguide. A waveguide short - circuit device is the most basic tuning component in the waveguide. By changing the position of the piston body, the resonant frequency of the waveguide cavity or the entire microwave system can be changed to achieve matching or tuning functions. The standing - wave ratio at the input end is about 100 - 170, so that the transmission line is approximately in a short - circuit state.

[0005] However, in the prior art, a planar reflector is usually used as a waveguide short - circuit device, and the reflecting surface in the planar reflector is in full - contact with the inner wall of the waveguide cavity, that is, the reflecting surface contacts the inner wall of the waveguide cavity. This contact causes friction during the movement of the reflecting surface, which will lead to wear of the reflecting surface, not only causing a change in the area of the reflecting surface, but also making the moving position of the reflecting surface unable to be accurately controlled.

[0006] Therefore, the above - mentioned prior art has at least the following technical problems: The waveguide short - circuit plane of the waveguide short - circuit device in the prior art is prone to wear and the position cannot be accurately controlled. Summary of the Invention

[0007] By providing a non - contact waveguide short - circuit device in an embodiment of the present application, the technical problems that the waveguide short - circuit plane of the waveguide short - circuit device in the prior art is prone to wear and the position cannot be accurately controlled are solved.

[0008] To solve the above technical problems, an embodiment of the present application provides a non-contact waveguide short-circuit breaker, which includes a piston body and a circular waveguide. One end of the piston body forms a short-circuit surface, and the other end of the piston body is inserted into the circular waveguide through one end of the circular waveguide, and there is a gap between the outer wall surface of the piston body and the inner wall surface of the circular waveguide;

[0009] The piston body is connected with a tuning device, and the tuning device can drive the piston body to move horizontally in the circular waveguide, so as to adjust the position of the short-circuit surface relative to the circular waveguide.

[0010] Furthermore, an insulating support is also arranged between the outer wall surface of the piston body and the inner wall surface of the circular waveguide. One side of the insulating support is fixed on the outer wall surface of the piston body, and the other side is in contact with the inner wall surface of the circular waveguide.

[0011] Furthermore, an end cover is arranged at the other end of the circular waveguide, and the insulating member can horizontally move through the end cover;

[0012] One end of the insulating member located inside the circular waveguide is connected to the piston body, and one end of the insulating member located outside the circular waveguide is connected to the tuning device. The tuning device drives the piston body to move horizontally through the insulating member;

[0013] Wherein, the insulating member is made of insulating material and does not contact the end cover.

[0014] Furthermore, the tuning device includes a fixed adjustment table, a lead screw extending along the horizontal direction is rotatably penetrated through the adjustment table, a slide plate is engaged with the lead screw, and the insulating member is fixed on the slide plate;

[0015] When the lead screw rotates, it drives the slide plate to move horizontally, thereby driving the piston body to move horizontally.

[0016] Furthermore, one end of the lead screw is connected with a hand crank for driving the lead screw to rotate.

[0017] Furthermore, a length scale extending along the length direction of the lead screw is arranged on the adjustment table, an indication mark for indicating the length scale is arranged on the slide plate, and the indication mark and the length scale are used to indicate the horizontal movement distance of the slide plate.

[0018] Furthermore, both sides of the slide plate are slidably penetrated through slide rods, the slide rods are respectively fixed on both sides of the lead screw and are parallel to the lead screw. When the lead screw drives the slide plate to move horizontally, the slide plate slides on the slide rods.

[0019] Further, the inside of the piston body is hollow, and the other end of the piston body is open. A connecting seat is provided on the inner surface of the short circuit surface. The insulating member passing through the end cover enters the piston body through the opening of the piston body and is connected to the connecting seat, thereby being connected to the piston body;

[0020] A cooling cavity, a first liquid inlet pipe and a first liquid discharge pipe which are respectively communicated with the cooling cavity are arranged in the connecting seat. A second liquid inlet pipe and a second liquid discharge pipe are respectively arranged on the insulating member, and the second liquid inlet pipe and the second liquid discharge pipe extend outside the circular waveguide along the insulating member;

[0021] When the insulating member is connected to the connecting seat, the second liquid inlet pipe is aligned and communicated with the first liquid inlet pipe, and the second liquid discharge pipe is aligned and communicated with the first liquid discharge pipe;

[0022] The cooling medium enters the cooling cavity through the communicated first liquid inlet pipe and the second liquid inlet pipe, cools the piston body, and then is discharged through the communicated first liquid discharge pipe and the second liquid discharge pipe.

[0023] Further, a liquid inlet conduit and a liquid outlet conduit are respectively transversely arranged on the insulating member. One end of the liquid inlet conduit is communicated with the second liquid inlet pipe, and the other end forms a liquid inlet;

[0024] One end of the liquid outlet conduit is communicated with the second liquid discharge pipe, and the other end forms a liquid discharge port. The liquid inlet and the liquid discharge port are respectively located on two sides of the insulating member.

[0025] Further, a recess is arranged in the connecting seat. The insulating member is inserted into the recess and is in threaded connection with the recess, so as to realize the connection between the insulating member and the connecting seat;

[0026] A sealing ring is arranged at the threaded connection part between the insulating member and the connecting seat to prevent coolant from leaking at the butt joints of the first liquid inlet pipe and the second liquid inlet pipe and the first liquid discharge pipe and the second liquid discharge pipe.

[0027] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0028] In the embodiment of the present application, the piston body and the circular waveguide do not directly contact, forming a non-contact waveguide short-circuit breaker. Then, the movement of the piston body in the circular waveguide is not restricted, it is easy to realize the precise control of the position of the piston body, and the piston body will not be worn. In addition, the tuning device can adjust the insertion depth of the short circuit surface in the circular waveguide synthesizer, so as to conveniently adjust the position of the short circuit surface in the waveguide cavity.

[0029] In addition, in the embodiment of the present application, the hand crank is rotated to drive the screw rod to rotate, which drives the insulating member to move left and right, thereby driving the piston body to move left and right. This not only has a simple structure, low cost, and is easy to operate in a hand-cranked manner, but is also very convenient. At the same time, the position adjustment method of driving the piston body to move horizontally by rotating the screw rod is easier to achieve precise control of the short-circuit surface position.

[0030] At the same time, the aperture of the central axis hole of the end cover is much smaller than the diameter of the circular waveguide synthesizer. Since the radio frequency signal working in the circular waveguide is affected by the inner diameter size of the circular waveguide, it is not suitable for transmission in the end cover. Most of the signals are reflected by the piston body, and a very small part of the signal passes through the gap between the piston body and the circular waveguide. Only a very small amount of signal will leak out from the gap between the central axis hole and the insulating member. Moreover, since the insulating member is made of a hard insulating material, it is safe and reliable.

[0031] Finally, the embodiment of the present application is also provided with a cooling system for cooling the piston body, which can reduce the temperature of the piston body, control the deformation of the piston body, and is applicable to high-power waveguide synthesizers. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic structural diagram of a non-contact waveguide short-circuit breaker in an embodiment of the present invention;

[0034] Figure 2 It is a cross-sectional view of a non-contact waveguide short-circuit breaker in an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of the use state of a non-contact waveguide short-circuit breaker in an embodiment of the present invention. Detailed Embodiments

[0036] The embodiment of the present application provides a non-contact waveguide short-circuit breaker, which solves the technical problems that the waveguide short-circuit surface of the waveguide short-circuit breaker in the prior art is easily worn and the position cannot be precisely controlled.

[0037] In order to better understand the above technical solutions, the following will combine the description of the drawings of the specification and the specific embodiments to elaborate on the above technical solutions in detail.

[0038] As Figures 1 to 3As shown, in one or more embodiments of the present application, a non-contact waveguide short circuit breaker is provided, including a circular waveguide 10 and a piston body 20 coaxially arranged inside the circular waveguide 10. The piston body 20 can move horizontally along the axial direction of the circular waveguide 10 to achieve tuning. And the outer diameter of the piston body 20 is slightly smaller than the inner diameter of the circular waveguide 10. There is no direct contact between the piston body 20 and the circular waveguide 10, forming a non-contact waveguide short circuit breaker. Then, the movement of the piston body 20 in the circular waveguide 10 is not restricted, it is easy to achieve precise control of the position of the piston body 20, and the piston body 20 will not be worn.

[0039] An insulating support 22 is further provided between the outer peripheral surface of the piston body 20 and the inner peripheral surface of the circular waveguide 10. The insulating support 22 is fixed on the outer peripheral surface of the piston body 20 and extends radially outward along the piston body 20 to contact the inner wall surface of the circular waveguide 10, so as to further prevent the piston body 20 from contacting the circular waveguide 10. And the insulating support 22 is fixed on the piston body 20, which is more conducive to the movement of the piston body 20 compared to being fixed on the circular waveguide 10.

[0040] Specifically, there are 4 insulating supports 22 arranged at equal intervals along the circumferential direction of the piston body 20. Of course, it can also be 3, 6, more or less, and can also be arranged at unequal intervals, which is not limited here. The insulating support 22 can be made of a soft insulating material, such as rubber, silicone, etc.

[0041] Taking Figure 3 the direction in the use state of the non-contact waveguide short circuit breaker shown as the standard, the circular waveguide 10 is in the shape of a hollow cylinder and is made of a metal material, such as a copper metal alloy. The left end of the circular waveguide 10 is open, and a ring edge 11 is provided on the outer peripheral surface near the left end. A threaded hole penetrating axially is opened on the ring edge 11. By screwing a first bolt into the threaded hole, the circular waveguide 10 can be tightened and fixed on a circular waveguide synthesizer 60 or other objects, such as Figures 1 to 3 shown. The right end face 12 of the circular waveguide 10 is fixedly connected to an end cover 13 through a second bolt 14. A central shaft hole 15 penetrating axially along the circular waveguide 10 is opened at the center of the end cover 13, and the central shaft hole 15 can be penetrated by an insulating member 30 described below.

[0042] The piston body 20 is made of a metallic material, such as copper, metal alloy, etc. It is in the shape of a hollow cylinder, and one end (the right end) of the piston body 20 inserted into the circular waveguide 10 and facing the end cap 13 is open, so that the inner cavity of the piston body 20 communicates with the central shaft hole 15. An arc-shaped end face serving as a short circuit surface 21 is formed at the left end of the piston body 20. A connecting seat 23 extending along the central axis of the piston body 20 is provided on the inner surface of the arc-shaped end face. The connecting seat 23 is used to connect the insulating member 30 described below.

[0043] The insulating member 30 includes an inner section 31 that can be inserted into the cavity of the piston body 20 through the central shaft hole 15 and is fixedly connected to the connecting seat 23, and an outer section 32 exposed outside the circular waveguide 10. The inner section 31 is in the shape of a cylinder, and the outer diameter of the inner section 31 is slightly smaller than the aperture of the central shaft hole 15, so that the insulating member 30 does not contact the end cap 13. The outer section 32 is connected with a tuning device for driving the insulating member 30 to drive the piston body 20 to move left and right along the axis relative to the circular waveguide 10, so as to adjust the insertion depth of the short circuit surface 21 in the circular waveguide synthesizer 60, and thus adjust the position of the short circuit surface 21 in the waveguide cavity.

[0044] Specifically, the aperture of the central shaft hole 15 of the end cap 13 is much smaller than the diameter of the circular waveguide synthesizer 60. Since the radio frequency signal working in the circular waveguide synthesizer 60 is affected by the inner diameter size of the circular waveguide synthesizer 60, it is not suitable for transmission in the end cap 13. Most of the signals are reflected by the piston body 20. A very small amount of signals pass through the gap between the piston body 20 and the circular waveguide 10, and only a very small amount of signals will leak out from the gap between the central shaft hole 15 and the insulating member 30. And since the insulating member 30 is made of a hard insulating material, such as polyvinyl chloride, Ultem (a kind of polyetherimide), etc., the verified transmission loss is about 100 dB, which is safe and reliable.

[0045] Furthermore, a recess is formed on the connecting seat 23, and internal threads are provided on the inner wall of the recess. External threads are provided on the inner section 31 of the insulating member 30. A part of the inner section 31 of the insulating member 30 is inserted into the recess, and threaded connection is achieved through the cooperation of the external threads and the internal threads.

[0046] Further, the tuning device includes an adjustment table 41 laid under the insulating member 30. The left end of the adjustment table 41 is fixed to the end cover 13, and the right end of the adjustment table 41 extends axially rightward along the circular waveguide 10. A lead screw 42 parallel to the axis of the circular waveguide 10 is rotatably penetrated through the adjustment table 41. The right end of the lead screw 42 is connected with a hand crank 43 to drive the lead screw 42 to rotate. A slide plate 44 is engaged with the lead screw 42, and the outer section 32 of the insulating member 30 is fixed to the slide plate 44.

[0047] In this way, by rotating the hand crank 43, the lead screw 42 can be driven to rotate. Due to the engagement between the lead screw 42 and the slide plate 44, the forward and reverse rotations of the lead screw 42 can be converted into the left and right horizontal movements of the slide plate 44, thereby driving the insulating member 30 to move left and right, and then driving the piston body 20 to move left and right. The tuning structure is simple and the cost is low. At the same time, the position adjustment method of driving the piston body 20 to move horizontally by rotating the lead screw 42 is easier to achieve precise control, and the hand-cranked method is easy to operate and very convenient.

[0048] In addition, a length scale 46 extending along the length direction of the lead screw 42 is provided on the side surface of the adjustment table 41, and an indicating mark 49 corresponding to the length scale 46, such as an indicating needle, is provided on the side surface of the same side of the slide plate 44 to align with the length scale 46, so as to measure the moving distance of the slide plate 44, which is convenient for further realizing the precise adjustment of the position of the short-circuit surface 21.

[0049] Further, the insulating member 30 is fixed to the slide plate 44 through a connecting plate 50. Wherein, the bottom surface of the connecting plate 50 is fixed to the slide plate 44, bolt holes for connecting the outer section 32 are provided on the top surface of the connecting plate 50, and the outer section 32 is fixed to the connecting plate 50 through a third bolt 31.

[0050] Furthermore, the two sides of the slide plate 44 are slidably penetrated through slide rods 45. The slide rods 45 are respectively fixed on both sides of the lead screw 42 and are parallel to the lead screw 42. Due to the arrangement of the slide rods 45 and the connecting plate 50, the movement of the insulating member 30 is made more stable.

[0051] In addition, the bottom surface of the adjustment table 41 is fixed to the end cover 13 through a right-angle bracket 47. The two connecting surfaces perpendicular to each other of the right-angle bracket 47 are respectively fixed to the end cover 13 and the adjustment table 41 through fourth bolts, and the right-angle bracket 47 is provided with reinforcing rib plates 48 to improve the load-bearing capacity and support stability.

[0052] It should be clear that the set height of the tuning device needs to ensure that the inner section 31 of the insulating member 30, the piston body 20, and the circular waveguide 10 are coaxially arranged. In addition, the sliding stroke of the insulating member 30 is long enough to prevent the connection seat 23 from contacting the end cover 13 during the sliding process.

[0053] In the prior art, a high-power waveguide synthesizer uses the method of simultaneously inputting multiple input ports to increase the combined power. When multiple input ends are input simultaneously, the temperature inside the waveguide synthesizer is likely to rise, causing a frequency shift of the synthesized signal. For this reason, the non-contact waveguide short-circuit breaker described in the embodiments of the present application is also provided with a cooling system for cooling the piston body 20.

[0054] As Figures 1 to 3 shown, the cooling system includes a cooling cavity 24 provided in the connection seat 23, a first liquid inlet pipe 26, and a first liquid discharge pipe 27. The outlet of the first liquid inlet pipe 26 and the inlet of the first liquid discharge pipe 27 are respectively communicated with the cooling cavity 24, and the inlet of the first liquid inlet pipe 26 and the outlet of the first liquid discharge pipe 27 respectively extend to the recess of the connection seat 23.

[0055] The inner section 31 of the insulating member 30 is respectively provided with a second liquid inlet pipe 33 and a second liquid discharge pipe 34, and the outlet of the second liquid inlet pipe 33 and the inlet of the second liquid discharge pipe 34 respectively extend to the end face of the inner section 31 of the insulating member 30; when the insulating member 30 is fixedly connected to the connection seat 23 by threading, the first liquid inlet pipe 26 and the first liquid discharge pipe 27 are respectively butted and communicated with the second liquid inlet pipe 33 and the second liquid discharge pipe 34.

[0056] The inlet of the second liquid inlet pipe 33 and the outlet of the second liquid discharge pipe 34 extend outward along the insulating member 30 to the circular waveguide 10 to connect a cooling water source and discharge the cooling water in the cooling cavity 24, forming a cooling cycle to reduce the temperature of the piston body 20. Of course, the cooling water can also be other cooling media such as softened water and cooling oil.

[0057] The cooling medium enters the cooling cavity 24 through the first liquid inlet pipe 26 and the second liquid inlet pipe 33, cools the piston body 20, and then is discharged through the first liquid discharge pipe 27 and the second liquid discharge pipe 34, which can control the deformation of the piston. To improve the cooling effect, the connection seat 23 is tightly connected to the piston body 20, for example, integrally arranged, and the connection seat 23 can be made of a metal material with good heat conduction, such as copper.

[0058] To facilitate the connection of the second liquid inlet pipe 33 and the second liquid discharge pipe 34 to cool water and discharge the cooled water, a liquid inlet conduit and a liquid discharge conduit are respectively horizontally provided on the insulating member 30. The inner end of the liquid inlet conduit communicates with the inlet of the second liquid inlet pipe 33, and the outer end of the liquid inlet conduit forms a liquid inlet 36. The inner end of the liquid discharge conduit communicates with the outer end of the second liquid discharge pipe 34, and the outer end of the liquid discharge conduit forms a liquid discharge port 35. Due to the provision of the liquid inlet conduit and the liquid discharge conduit, the liquid inlet 36 and the liquid discharge port 35 are respectively located on both sides of the insulating member 30, which is more conducive to connecting the cooling water source and discharging the cooled water in the cooling cavity 24 to the outside.

[0059] Furthermore, as Figure 2 , 3 shown, a sealing ring is provided at the threaded connection between the connection seat 23 and the insulating member 30 to prevent coolant leakage at the docking joints of the first liquid inlet pipe 26, the first liquid discharge pipe 27 with the second liquid inlet pipe 33 and the second liquid discharge pipe 34.

[0060] Even further, as Figure 2 , 3 shown, a drain port communicating with the cooling cavity 24 is provided on the circumferential surface of the connection seat 23 for the cooling cavity 24, and a sealing plug 25 is provided at the drain port to completely drain the coolant in the cooling cavity 24 when necessary.

[0061] The connection seat 23 not only physically connects the piston body 20 and the insulating member 30, but also has the cooling cavity 24 provided thereon to cool the piston body 20, thus simplifying the structure.

[0062] It should be understood that although terms such as "first" and "second" may be used here to describe each unit, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, the first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit.

[0063] The outer, middle, inner and other orientation terms mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0064] The above are only the preferred embodiments of the present application, and do not impose any formal or substantial restrictions on the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the method of the present application, several improvements and supplements can still be made, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any equivalent changes in the form of slight modifications, decorations, and evolutions made by those skilled in the art who are familiar with this specialty without departing from the spirit and scope of the present application by using the technical content disclosed above are equivalent embodiments of the present application; at the same time, any equivalent changes in the form of modifications, decorations, and evolutions made to the above embodiments based on the substantial technology of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A non-contact waveguide short circuit breaker, characterized in that, It includes a piston body and a circular waveguide. One end of the piston body forms a short circuit plane. The other end of the piston body is inserted into the circular waveguide through one end of the circular waveguide, and there is a gap between the outer wall surface of the piston body and the inner wall surface of the circular waveguide; The piston body is connected with a tuning device, and the tuning device can drive the piston body to move horizontally in the circular waveguide, so as to adjust the position of the short circuit plane relative to the circular waveguide; An insulating support is also provided between the outer wall surface of the piston body and the inner wall surface of the circular waveguide. One side of the insulating support is fixed on the outer wall surface of the piston body, and the other side is in contact with the inner wall surface of the circular waveguide to prevent the piston body from contacting the circular waveguide.

2. The non-contact waveguide short circuit breaker according to claim 1, wherein An end cover is provided at the other end of the circular waveguide, and an insulating member can pass through the end cover horizontally; One end of the insulating member located inside the circular waveguide is connected to the piston body, and one end of the insulating member located outside the circular waveguide is connected to the tuning device. The tuning device drives the piston body to move horizontally through the insulating member; Wherein, the insulating member is made of insulating material and does not contact the end cover.

3. The non-contact waveguide short circuit breaker according to claim 2, characterized in that, The tuning device includes a fixed adjustment table. A lead screw extending along the horizontal direction is rotatably penetrated through the adjustment table. A slide plate is engaged with the lead screw, and the insulating member is fixed on the slide plate; When the lead screw rotates, it drives the slide plate to move horizontally, thereby driving the piston body to move horizontally.

4. The non-contact waveguide short circuit breaker according to claim 3, wherein One end of the lead screw is connected with a hand crank for driving the lead screw to rotate.

5. The non-contact waveguide short circuit breaker according to claim 3, characterized in that, A length scale extending along the length direction of the lead screw is provided on the adjustment table, and an indication mark for indicating the length scale is provided on the slide plate. The indication mark and the length scale are used to indicate the horizontal movement distance of the slide plate.

6. The non-contact waveguide short circuit breaker according to claim 3, characterized in that, Both sides of the slide plate are slidably penetrated through slide bars. The slide bars are respectively fixed on both sides of the lead screw and are parallel to the lead screw. When the lead screw drives the slide plate to move horizontally, the slide plate slides on the slide bars.

7. The non-contact waveguide short circuit breaker according to claim 2, wherein The inside of the piston body is hollow, and the other end of the piston body is open. A connection seat is provided on the inner surface of the short circuit plane. The insulating member passing through the end cover enters the piston body through the opening of the piston body and is connected to the connection seat, so as to be connected to the piston body; A cooling cavity, a first liquid inlet pipe and a first liquid discharge pipe respectively communicated with the cooling cavity are provided in the connection seat. A second liquid inlet pipe and a second liquid discharge pipe are respectively provided on the insulating member, and the second liquid inlet pipe and the second liquid discharge pipe extend out of the circular waveguide along the insulating member; When the insulating member is connected to the connection seat, the second liquid inlet pipe is aligned and communicated with the first liquid inlet pipe, and the second liquid discharge pipe is aligned and communicated with the first liquid discharge pipe; The cooling medium enters the cooling cavity through the communicated first liquid inlet pipe and the second liquid inlet pipe, cools the piston body, and then is discharged through the communicated first liquid discharge pipe and the second liquid discharge pipe.

8. The non-contact waveguide short circuit breaker according to claim 7, characterized in that The insulating member is respectively horizontally provided with a liquid inlet conduit and a liquid outlet conduit. One end of the liquid inlet conduit is communicated with the second liquid inlet pipe, and the other end forms a liquid inlet; One end of the liquid outlet conduit is communicated with the second liquid discharge pipe, and the other end forms a liquid discharge port, and the liquid inlet and the liquid discharge port are respectively located on both sides of the insulating member.

9. The non-contact waveguide short-circuit breaker according to claim 7, characterized in that, A recess is provided in the connecting seat, and the insulating member is inserted into the recess and is threadedly connected with the recess, so as to realize the connection between the insulating member and the connecting seat; A sealing ring is provided at the threaded connection between the insulating member and the connecting seat to prevent coolant from leaking out at the butt joints of the first liquid inlet pipe and the second liquid inlet pipe, and the first liquid discharge pipe and the second liquid discharge pipe.

Images