CN216593937U

CN216593937U - Vacuum container

Info

Publication number: CN216593937U
Application number: CN202123003971.6U
Authority: CN
Inventors: 陈永伟; 李东; 周新星
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-05-24
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a vacuum container, which comprises a closed container body, a first air pipe, a second air pipe and a third air pipe, wherein the first air pipe is used for being connected between the container body and a vacuum pumping pump; the top of the container body is provided with a first vent connected with the first air pipe, and the bottom of the container body is provided with a second vent connected with the second air pipe and a third vent connected with the third air pipe; the second vent and the third vent are arranged at intervals. The vacuum container is suitable for a system where a nuclear-grade transmitter is located, the connection between the vacuum container and the water container and the isolation diaphragm box is realized through the arrangement of the upper air pipe of the vacuum container, the vacuum pumping of the water container and the isolation diaphragm box is realized through the vacuum pumping of the container body, and further the vacuum pumping and liquid filling functions of the capillary pipeline, the isolator diaphragm box and the cavity of the transmitter body are realized.

Description

Vacuum container

Technical Field

The utility model relates to the technical field of vacuumizing, in particular to a vacuum container.

Background

The structure of the nuclear level transmitter with the capillary line mainly comprises a transmitter body, the capillary line and an isolator. The isolator is directly connected with a loop medium, directly senses the pressure of the medium and transmits the pressure to the capillary line. The capillary line is filled with desalted and deoxygenated water, and pressure transmission is realized through water medium. The transmitter body adopts an inductive measuring principle, senses differential pressure and converts the change of the differential pressure of physical quantity into the change of an inductive signal.

The installation and replacement of the nuclear level transmitter with the capillary line adopt a vacuumizing and liquid filling technology, namely, the capillary line, the isolator and the pressure transmission medium cavity of the transmitter body need to be vacuumized, and the capillary line, the isolator and the pressure transmission medium cavity are filled with desalted and deoxidized water. Because the filling effect of the capillary line, the isolator and the cavity of the transmitter body directly influences the accuracy and the stability of the measurement of the transmitter, the effect of vacuumizing and filling liquid needs to be ensured.

Therefore, it is necessary to design a vacuum device to achieve the vacuum pumping and liquid filling effects.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vacuum container.

The technical scheme adopted by the utility model for solving the technical problems is as follows: providing a vacuum container, which comprises a closed container body, a first air pipe used for being connected between the container body and a vacuum-pumping pump, a second air pipe used for being connected between the container body and a water container, and a third air pipe used for being connected between the container body and an isolation diaphragm capsule;

the top of the container body is provided with a first vent connected with the first air pipe, and the bottom of the container body is provided with a second vent connected with the second air pipe and a third vent connected with the third air pipe; the second vent and the third vent are arranged at intervals.

Preferably, the first vent has an inner diameter greater than the inner diameters of the second and third vents.

Preferably, the second vent is funnel-shaped.

Preferably, the third vent is funnel-shaped.

Preferably, the container body is of a cylindrical structure.

Preferably, the ratio of the height of the container body to the bottom diameter of the container body is > 1.5.

Preferably, the wall thickness of the container body is more than or equal to 5 mm.

Preferably, the volume of the container body is greater than 0.4L.

Preferably, the vacuum vessel further comprises control valves respectively disposed on the first, second and third air pipes.

Preferably, the vacuum vessel further comprises a dryer disposed on the first air pipe.

The vacuum container is suitable for a system where a nuclear-grade transmitter is located, the connection between the vacuum container and the water container and the isolation diaphragm box is realized through the arrangement of the upper air pipe of the vacuum container, the vacuum pumping of the water container and the isolation diaphragm box is realized through the vacuum pumping of the container body, and further the vacuum pumping and liquid filling functions of the capillary pipeline, the isolator diaphragm box and the cavity of the transmitter body are realized.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural diagram of a vacuum vessel according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of a vacuum container according to an embodiment of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the vacuum vessel according to an embodiment of the present invention includes a sealed vessel body 10, a first air pipe 21, a second air pipe 22, and a third air pipe 23.

The first air pipe 21 is connected between the container body 10 and a vacuum pump (not shown), and when the vacuum pump 20 is operated, the container body 10 is evacuated through the first air pipe 21. The second air pipe 22 is used for connecting between the container body 10 and the water container 20 to realize the communication between the container body 10 and the water container 20; when the container body 10 is vacuumized, the upper space in the water container 20 is also vacuumized. The third air pipe 23 is used for connecting between the container body 10 and the isolation diaphragm box 30 to realize the communication between the container body 10 and the isolation diaphragm box 30; when the container body 10 is evacuated, the isolation capsule 30 is also evacuated.

The container body 10 is preferably made of a polymethylmethacrylate material, has good transparency, facilitates observation of the internal state, and has excellent weather resistance, high surface hardness and surface gloss, and good high temperature performance.

The container body 10 is integrally designed in a sealing manner, so that the vacuumizing effect is ensured, and the vacuum leakage is prevented.

In this embodiment, the container body 10 has a cylindrical structure. The diameter ratio of the height of the container body 10 to the bottom of the container body is larger than 1.5, a margin is independently reserved for a water-air medium passage, external water media are prevented from entering the first air pipe 21, particularly a pipeline where a vacuum pumping pump is located, and equipment damage is avoided.

The wall thickness of the container body 10 is preferably greater than or equal to 5mm in terms of size, ensuring that it has a certain mounting strength.

In terms of volume, the volume of the container body 10 is greater than 0.4L, so that the container body 10 has a suitable gas content. The volume of the container body 10 is mainly based on the output of the vacuum pump, the volume of the pipeline and the isolation diaphragm capsule 30 and the consideration of the protection function of the vacuum pump, the vacuum degree is quickly balanced through the container body 10, the container body 10 always maintains high vacuum, the pressure difference between the vacuum degree and the air in the capillary is increased, and the air extraction efficiency is improved. However, the volume of the container body 10 is not so large as to increase the time required for evacuation.

Corresponding to the connection of each air pipe, the top of the container body 10 is provided with a first vent 11, and the bottom is provided with a second vent 12 and a third vent 13. Wherein the first vent 11 is connected to the first air tube 21 so that the first air tube 21 is mainly connected to the top of the container body 10; the second vent 12 is connected to the second air tube 22, and the third vent 13 is connected to the third air tube 23, so that the second air tube 22 and the third air tube 23 are mainly connected to the bottom of the container body 10.

The inner diameter of the first vent 11 is larger than the inner diameters of the second vent 12 and the third vent 13; correspondingly, the pipe diameter of the first air pipe 21 is also larger than the pipe diameters of the second air pipe 22 and the third air pipe 23, which is beneficial to improving the vacuum pumping capacity when the vacuum pumping pump operates.

The second vent 12 is funnel shaped with the smaller diameter end down to connect to a second gas tube 22. The second funnel-shaped vent 12 facilitates the evacuation of water when water is introduced into the interior of the container body 10. Of course, in normal operation, no aqueous medium is permitted to enter the container body 10.

Similarly to the second vent 12, the third vent 13 is also funnel-shaped.

Further, the vacuum vessel of the present invention may further include

control valves

31, 32, 33 respectively provided on the first, second and

third air pipes

21, 22 and 23. The control valve 31 on the first air pipe 21 is used for controlling the on-off of the first air pipe 21, the control valve 32 on the second air pipe 22 is used for controlling the on-off of the second air pipe 22, and the control valve 33 on the third air pipe 23 is used for controlling the on-off of the third air pipe 23.

The

control valves

31, 32, 33 can be electrically operated to realize automatic control.

The vacuum vessel of the present invention may further include a dryer 40 disposed on the first air pipe 21, and may dry the air passing through the first air pipe 21 to prevent the aqueous medium from entering the vacuum pump. The third air pipe 33 may be connected to a vacuum sensor, and the vacuum sensor may detect the vacuum degree in the third air pipe 33 or the container body 10.

When the vacuum container of the present invention is used, as shown in fig. 2, the first air tube 21 is connected to a vacuum pump, and the second air tube 22 and the third air tube 23 are connected to the water container 20 and the isolation bellows 30, respectively. After the water container 20 is filled with the demineralized water, a water passage at the lower part of the water container 20 is closed, and a gas passage is established with the container body 10; the third air duct 23 is closed by controlling the valve 33. The vacuum pump is started, the interior of the container body 10 is vacuumized through the first air pipe 21, the upper portion of the interior of the water container 20 is vacuumized through the second air pipe 22, a vacuum environment at the upper portion of the water container 20 is established, degassing of demineralized water is achieved through the pressure difference between air and water, and meanwhile residual air in a water passage of the water container 20 is removed.

When the control valve 33 is opened to communicate the container body 10 and the isolation diaphragm box 30, the isolation diaphragm box 30 and the transmitter body chamber connected to the isolation diaphragm box 30 through the capillary line can be vacuumized.

When the liquid is filled, the water passage at the lower part of the water container 20 is opened to communicate the water container 20 and the isolation diaphragm box 30. The water with the functions of removing salt and removing oxygen in the water container 20 is injected into the isolation diaphragm box 30 and the capillary line under the action of gravity; meanwhile, the air passage on the water container 20 is switched to atmospheric pressure, and because the atmospheric pressure is far greater than the pressure of the air cavity of the capillary line, the water in the water container 20 is pressed into the capillary line, so that the liquid filling of the capillary line, the isolation diaphragm capsule 30 and the cavity of the transmitter body is realized.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A vacuum container is characterized by comprising a closed container body, a first air pipe, a second air pipe and a third air pipe, wherein the first air pipe is used for being connected between the container body and a vacuum pumping pump;

2. The vacuum vessel of claim 1, wherein the first vent has an inner diameter greater than the inner diameters of the second and third vents.

3. The vacuum vessel of claim 1, wherein the second vent is funnel-shaped.

4. The vacuum vessel of claim 1, wherein the third vent is funnel-shaped.

5. The vacuum vessel according to claim 1, wherein the vessel body has a cylindrical structure.

6. The vacuum vessel of claim 5, wherein a ratio of a height of the vessel body to a bottom diameter of the vessel body is > 1.5.

7. The vacuum vessel according to claim 1, wherein the wall thickness of the vessel body is not less than 5 mm.

8. The vacuum vessel of claim 1, wherein the volume of the vessel body is greater than 0.4L.

9. The vacuum vessel according to any one of claims 1 to 8, further comprising control valves respectively provided on the first air pipe, the second air pipe and the third air pipe.

10. The vacuum vessel of claim 9, further comprising a dryer disposed on the first gas line.