CN219573356U

CN219573356U - Travelling wave tube vacuum monitoring device

Info

Publication number: CN219573356U
Application number: CN202320213417.0U
Authority: CN
Inventors: 宋朋; 李延威; 周金; 肖新来; 徐鹏; 孙宁; 杨翔宇
Original assignee: Shandong Microwave Vacuum Technology Co ltd
Current assignee: Shandong Microwave Vacuum Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-08-22
Anticipated expiration: 2033-02-10

Abstract

The utility model belongs to the technical field of traveling wave tube manufacturing, and particularly provides a traveling wave tube vacuum monitoring device, which comprises a base body, an air inlet pipe and an ionization gauge, wherein a chamber for accommodating gas is arranged in the base body, and the upper end of the base body is provided with a mounting port communicated with the chamber; one end of the air inlet pipe is communicated with the titanium pump exhaust pipe at the travelling wave tube, and the other end of the air inlet pipe is communicated with the cavity of the seat body; the ionization gauge comprises a first flange and a gauge pipe which are connected; the pedestal is provided with a second flange at the mounting opening, the mounting opening is plugged by the first flange, the first flange is in sealing connection with the second flange, and the gauge pipe extends into the cavity. The utility model can monitor the internal vacuum degree of the traveling wave tube after the exhaust packaging, so as to provide a basis for the subsequent judgment of the internal vacuum degree of the traveling wave tube and the change of the working state of the traveling wave tube.

Description

Travelling wave tube vacuum monitoring device

Technical Field

The utility model belongs to the technical field of traveling wave tubes, and particularly provides a traveling wave tube vacuum monitoring device.

Background

The travelling wave tube is a microwave electric vacuum device, and is widely applied to satellite effective load systems to play a role in final amplification of microwaves. After the traveling wave tube is subjected to exhaust, the interior of the traveling wave tube reaches an extremely high vacuum degree, but in the processes of subsequent debugging, aging and the like, the phenomenon of air outlet of internal components exists. The vacuum degree in the vacuum tube is reduced due to the fact that the internal components are out of the air, the internal electron beam state and the like are affected, and the working state of the traveling wave tube is changed.

In the related technical scheme, in order to solve the problem of vacuum degree reduction caused by the air outlet in the traveling wave tube, the titanium pump is utilized to carry out air extraction on the traveling wave tube.

However, the inventor knows that in the above technical scheme, because the internal dimension of the traveling wave tube is limited by the structure, the measurement and real-time monitoring of the vacuum degree of the traveling wave tube after the exhaust seal is separated are inconvenient, and the periodic or continuous air suction of the traveling wave tube by using the titanium pump is inconvenient to judge the influence of the vacuum degree in the traveling wave tube on the working state.

Disclosure of Invention

The utility model aims to provide a traveling wave tube vacuum monitoring device to at least solve one of the technical problems.

In order to solve the above problems in the prior art, one or more embodiments of the present utility model provide a traveling wave tube vacuum monitoring device, including a base, an air inlet tube and an ionization gauge, wherein a chamber for accommodating gas is provided in the base, and an installation port for communicating the chamber is provided at the upper end of the base; one end of the air inlet pipe is communicated with the titanium pump exhaust pipe at the travelling wave tube, and the other end of the air inlet pipe is communicated with the cavity of the seat body; the ionization gauge comprises a first flange and a gauge pipe which are connected; the pedestal is provided with a second flange at the mounting opening, the mounting opening is plugged by the first flange, the first flange is in sealing connection with the second flange, and the gauge pipe extends into the cavity.

Further, the axes of the first flange and the second flange are vertically arranged, and the gauge pipes are vertically arranged.

Further, the horizontal cross sections of the mounting port and the chamber are circular.

Further, a sealing element is arranged at the connecting surface of the first flange and the second flange.

Further, the ionization gauge is an ultrahigh vacuum hot cathode ionization gauge.

Further, the area of the chamber along the horizontal section is larger than the area of the cross section of the titanium pump exhaust pipe, and the area of the cross section of the titanium pump exhaust pipe is larger than the area of the cross section of the air inlet pipe.

The beneficial effects of one or more of the technical schemes are as follows:

in the scheme, an air inlet pipe of the monitoring device is communicated with a titanium pump exhaust pipe at the traveling wave tube, namely, the vacuum degree inside the traveling wave tube is represented by the vacuum degree of the titanium pump exhaust pipe; the problem that the traveling wave tube is inconvenient to monitor after being sealed off by exhaust is avoided.

In the scheme, one end of an air inlet pipe is communicated with a titanium pump exhaust pipe, the other end of the air inlet pipe is communicated with a seat body, a gauge pipe of an ionization gauge is arranged in an inner cavity of the seat body, and the inner cavity of the seat body is communicated with a second flange through a first flange; in the arrangement mode, the inner cavity of the seat body is only communicated with the titanium pump exhaust pipe, the size of the inner cavity in the seat body is not limited by the titanium pump exhaust pipe, and the seat body is convenient for providing required space for installation and measurement of the ionization gauge.

In the scheme, the first flange, the second flange and the gauge pipe are vertically arranged, so that the requirement of the vertical orientation of the gauge pipe of the ionization gauge is met when the ionization gauge is used, and the measurement accuracy is further provided.

In this scheme, the horizontal cross-section of installing port and cavity all is circular in this scheme, is convenient for make and follow-up install through first flange and second flange.

In this scheme, through cavity, titanium pump blast pipe and intake pipe department sectional area size change, be convenient for utilize the intake pipe to introduce the cavity with gas from titanium pump blast pipe to make the size of cavity accord with the installation size requirement of ionization gauge.

Drawings

Some embodiments of the utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic perspective view of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic front view of the overall structure of an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view taken in the direction A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view of a base according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of a seat and an air inlet pipe according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the structure of an ultra-high vacuum hot cathode ionization gauge of the present utility model;

fig. 7 is a schematic view of the communication between the air inlet pipe and the titanium pump exhaust pipe in the present utility model.

1. A titanium pump exhaust pipe; 2. an air inlet pipe; 3. a base; 4. ionization gauge; 5. a first flange; 501. a first connection hole; 301. a second connection hole; 302. a seat body; 303. a second flange; 304. a flange; 305. an annular mounting surface.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only preferred embodiments of the present utility model, which are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "center," "upper," "lower," "top," "bottom," "vertical," "horizontal," "inner," "outer," and the like indicate directional or positional relationships, and are based on the directional or positional relationships shown in the drawings, for convenience of description only, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the connection may be direct, indirect via an intermediate medium, or communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

As shown in fig. 1 to 7, an exemplary embodiment of the present utility model provides a traveling wave tube vacuum monitoring device, which includes a base 3, an air inlet pipe 2 and an ionization gauge 4, wherein a chamber for accommodating gas is provided in the base 3, and an installation port for communicating the chamber is provided at the upper end of the base 3; one end of the air inlet pipe 2 is communicated with the titanium pump exhaust pipe 1 at the travelling wave tube, and the other end is communicated with the cavity of the seat body 3; the ionization gauge 4 comprises a first flange 56 and a gauge tube which are connected; the seat body 3 is provided with a second flange 303 at the mounting opening, the first flange 56 seals the mounting opening, the first flange 56 is in sealing connection with the second flange 303, and the gauge pipe extends into the cavity.

Specifically, the above-mentioned pedestal 3 plays the function of mount pad, and it provides the basis for ionization gauge 4's installation to provide and hold a chamber that can hold the rule male, the size of this chamber can not receive travelling wave tube, the shape and the size restriction of titanium pump blast pipe 1, is convenient for satisfy ionization gauge 4's operation requirement.

The shape and size of the outer contour of the housing 3 are not limited in the case where the chamber and the mounting port can satisfy the mounting requirement of the ionization gauge 4.

In this embodiment, in order to facilitate communication between the titanium pump exhaust pipe 1 and the chamber of the seat body 3, the area of the cross section of the titanium pump exhaust pipe 1 is larger than the area of the cross section of the intake pipe 2. The area of the chamber along the horizontal section is larger than the area of the cross section of the titanium pump exhaust pipe 1. In the setting mode, the existing traveling wave tube aging and debugging system can be improved; during transformation, only a first through hole is formed in the middle or at the tail end of the titanium pump exhaust pipe 1, then one end of the air inlet pipe 2 is inserted into the first through hole, and sealing of the joint of the air inlet pipe 2 and the first through hole is completed. Similarly, in order to realize the communication between the air inlet pipe 2 and the chamber at the seat body 3, a second through hole is formed in the side wall of the seat body 3, the chamber is communicated with the second through hole, the other end of the air inlet pipe 2 is inserted into the second through hole, and the joint of the air inlet pipe 2 and the second through hole is sealed.

In this embodiment, the sealant may be applied to the outer wall of the air inlet pipe 2, and then the sealing between the outer wall surface of the air inlet pipe 2 and the inner wall surface of the first through hole or the second through hole is achieved by using the sealant. In other embodiments, the sealing glue can be replaced by a sealing sleeve, and the sealing sleeve is sleeved outside the air inlet pipe 2, so that the sealing effect is achieved.

According to the technical scheme, the ionization gauge 4 is used for measuring the vacuum degree in the cavity, so that the vacuum degree in the traveling wave tube is characterized. The measuring range of the ionization gauge 4 is related to the model and the specification, and is selected by a person skilled in the art under the condition of meeting the use requirement.

In a specific form of the ionization gauge 4, the ionization gauge 4 adopts an ultra-high vacuum hot cathode ionization gauge 4, preferably, the ionization gauge 4 can adopt a DL-7 (ZJ-12) ultra-high vacuum hot cathode ionization gauge 4, and the cathode filament material of the ionization gauge 4 is iridium wire coated with yttrium oxide.

In this embodiment, the axes of the first flange 56 and the second flange 303 are arranged vertically, and the gauge is arranged vertically.

In this embodiment, the horizontal cross-sections of the mounting port and the chamber are both circular.

Specifically, the seat body 3 includes a seat body 302, and a second flange 303 is fixed to an upper end of the seat body 302, and the second flange 303 does not obstruct leakage of an installation opening at an upper end of the seat body. A ring-shaped mounting surface 305 is arranged on the upper surface of the second flange 303 outside the mounting opening, a sealing gasket is mounted at the ring-shaped mounting surface 305, the lower surface of the sealing gasket is attached to the ring-shaped mounting surface 305 of the second flange 303, and the upper surface of the sealing gasket is attached to the lower surface of the first flange 56, so that sealing can be realized.

In this embodiment, an annular flange 304 is fixed to the edge of the inner ring of the second flange 303; an annular positioning groove is formed in the lower surface of the first flange 56, and the outer annular surface of the flange 304 is matched with the inner annular surface of the positioning groove, so that the first flange 56 and the second flange 303 are centered.

In this embodiment, a sealing member is provided at the junction surface of the first flange 56 and the second flange 303.

Specifically, as shown in fig. 3 and 4, the first flange 56 has a first connection hole 501, the second flange 303 has a second connection hole 301, and when the flange surfaces of the first flange 56 and the second flange 303 are butted against each other, after the first connection hole 501 and the corresponding second connection hole 301 are aligned, connection can be performed by using a connection member. As shown in fig. 3, the first connecting hole 501 at the first flange 56 is a blind hole, in this case, in order to connect the two flanges, the first connecting hole 501 and the second connecting hole 301 may be provided as threaded holes, and then the first connecting hole 501 and the second connecting hole 301 may be connected by bolts. In other embodiments, the first connecting hole 501 and the second connecting hole 301 are through holes and have a unthreaded hole structure, and may be connected by a bolt and a nut.

According to the embodiment, the structure of the traveling wave tube titanium pump exhaust pipe 1 is expanded, the ionization gauge 4 is placed at the seat body 3, so that the vacuum degree inside the traveling wave tube can be indirectly measured in real time, and trace can be achieved when the state change phenomenon is caused by the fact that the traveling wave tube is exhausted again, and the follow-up analysis is greatly facilitated.

Thus far, the technical solution of the present utility model has been described in connection with the foregoing preferred embodiments, but it will be readily understood by those skilled in the art that the scope of the present utility model is not limited to the above-described preferred embodiments. The technical solutions in the above preferred embodiments can be split and combined by those skilled in the art without departing from the technical principles of the present utility model, and equivalent changes or substitutions can be made to related technical features, so any changes, equivalent substitutions, improvements, etc. made within the technical principles and/or technical concepts of the present utility model will fall within the protection scope of the present utility model.

Claims

1. The utility model provides a travelling wave tube vacuum monitoring devices which characterized in that includes:

a base body, the inside of which is provided with a chamber for containing gas, the upper end of the seat body is provided with a mounting port communicated with the cavity;

one end of the air inlet pipe is communicated with the titanium pump exhaust pipe at the traveling wave tube, and the other end of the air inlet pipe is communicated with the cavity of the seat body;

the ionization gauge comprises a first flange and a gauge pipe which are connected;

the seat body is provided with a second flange at the mounting opening, the mounting opening is plugged by the first flange, the first flange is connected with the second flange in a sealing manner, and the gauge pipe extends into the cavity.

2. The traveling wave tube vacuum monitoring device according to claim 1, wherein the axes of the first flange and the second flange are arranged vertically, and the gauge tube is arranged vertically.

3. The traveling wave tube vacuum monitoring device of claim 2, wherein the mounting port and the chamber are circular in horizontal cross-section.

4. The traveling wave tube vacuum monitoring device according to claim 1, wherein a sealing member is provided at a connection surface of the first flange and the second flange.

5. The traveling wave tube vacuum monitoring device of claim 1, wherein the ionization gauge is an ultra-high vacuum hot cathode ionization gauge.

6. The traveling wave tube vacuum monitoring device of claim 1, wherein the area of the chamber along the horizontal cross section is greater than the area of the cross section of the titanium pump exhaust tube, which is greater than the area of the cross section of the air inlet tube.

7. The traveling wave tube vacuum monitoring device of claim 1, wherein the first flange and the second flange are metal flanges.