阅读说明：本技术 一种基于压差法的真空泄漏检验装置 (Vacuum leakage inspection device based on differential pressure method ) 是由 赵伟 周小龙 石敏 冯青宇 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种基于压差法的真空泄漏检验装置,它包括真空罩、拔插式气管、真空泵和便携锂电池组,所述的真空罩通过拔插式气管与真空泵连接,真空泵与便携锂电池组连接。所述的真空罩包括面板,其中,真空罩的面板上设有气管快速接口,真空罩的面板固定有照明支撑架,真空罩的面板上固定有快速接插真空表,真空罩的面板上固定有调节阀门,真空罩的面板上固定有人体工程学把手,真空的罩面板上固定有可调节式螺母,真空的罩面板的底部固定有包覆式密封条。本发明的有益效果在于：重量轻,转运方便,提供了作业效率；防水密封,可靠性和维护性能增加,使用周期达1000次；包覆式密封结构,可快速包覆焊缝,在5s内保证真空度不下降。(The invention discloses a vacuum leakage inspection device based on a differential pressure method, which comprises a vacuum cover, a pull-plug type air pipe, a vacuum pump and a portable lithium battery pack, wherein the vacuum cover is connected with the vacuum pump through the pull-plug type air pipe, and the vacuum pump is connected with the portable lithium battery pack. The vacuum cover include the panel, wherein, be equipped with the quick interface of trachea on the panel of vacuum cover, the panel of vacuum cover is fixed with the illumination support frame, is fixed with on the panel of vacuum cover and inserts the vacuum table fast, is fixed with adjusting valve on the panel of vacuum cover, is fixed with human engineering handle on the panel of vacuum cover, is fixed with the adjustable nut on the vaccum finish coat board, the bottom of vaccum finish coat board is fixed with cladding formula sealing strip. The invention has the beneficial effects that: the weight is light, the transportation is convenient, and the operation efficiency is improved; waterproof sealing, reliability and maintenance performance are improved, and the service cycle reaches 1000 times; the cladding type sealing structure can quickly clad the welding line and ensure that the vacuum degree is not reduced within 5 s.)

1. A leak inspection device based on a negative pressure difference is characterized in that: the vacuum cover is connected with the vacuum pump through the pull-plug type air pipe, and the vacuum pump is connected with the portable lithium battery pack.

2. The negative pressure difference-based leak inspection device according to claim 1, wherein: the vacuum cover include the panel, wherein, be equipped with the quick interface of trachea on the panel of vacuum cover, the panel of vacuum cover is fixed with the illumination support frame, is fixed with on the panel of vacuum cover and inserts the vacuum table fast, is fixed with adjusting valve on the panel of vacuum cover, is fixed with human engineering handle on the panel of vacuum cover, is fixed with the adjustable nut on the vaccum finish coat board, the bottom of vaccum finish coat board is fixed with cladding formula sealing strip.

3. The negative pressure difference-based leak inspection device according to claim 2, wherein: the lighting support frame is made of carbon steel.

4. A negative pressure difference-based leak inspection apparatus according to claim 2 or 3, wherein: and the lighting support frame is provided with a strip type LED lamp source.

5. The negative pressure difference-based leak inspection device according to claim 4, wherein: the strip type LED lamp source is fixed on the illumination support frame through the permanent magnetic base on the back surface.

6. The negative pressure difference-based leak inspection device according to claim 2, wherein: the bottom of the vacuum cover is attached with a waterproof protection ring, and the waterproof protection ring is fixed to the bottom of the vacuum cover by adopting waterproof glue.

7. The negative pressure difference-based leak inspection device according to claim 2, wherein: the quick-plugging vacuum meter is fixed on the vacuum cover panel by adopting a sealing threaded interface.

8. The negative pressure difference-based leak inspection device according to claim 1, wherein: the vacuum cover is integrally formed by transparent polycarbonate.

9. The negative pressure difference-based leak inspection device according to claim 2, wherein: the ergonomic handle is secured to the panel of the vacuum housing with screws.

Technical Field

The invention belongs to a pressurized water reactor nuclear power station flat plate weld inspection device, and particularly relates to a vacuum leakage inspection device based on a differential pressure method.

Background

The leak detection technique of vacuum cover is a kind of bubble leakage leak detection method, and the leak detection equipment is mainly composed of vacuum cover, vacuum pump, vacuum meter and air release valve. The leak detection is performed in order to detect the leak position of the pressure receiving member which cannot be directly pressurized. The basic method and principle are that foaming agent is coated on the local area of the detected part, a vacuum cover is placed on the foaming agent, the vacuum cover is vacuumized to enable the inner side and the outer side of the local area to form pressure difference, if the detected part has a penetrability defect, the foaming agent at the position of the defect can form bubbles due to the passing of gas, and the position where the bubbles emerge can be judged as a hole leakage position.

In field applications, engineering issues are addressed, particularly before and during service. In the early-service stage, the power consumption requirement is strict, a high-specification power supply is required to be used, most of inspection objects are welding seams of a pool covering surface, the fall is large, the area is large, inspection personnel need to climb to the high, the inspection personnel operate on a scaffold, the problems of difficulty in equipment transportation and inconvenience in power supply arrangement exist, and the work difficulty of the inspection personnel is increased in coastal areas, particularly in high-temperature weather of 7 months, 8 months and 9 months. The working environment of the pre-service stage is basically lack of environmental illumination, and the development of field co-walking is not facilitated, so that the requirement on the leakage detection equipment based on negative pressure difference is higher.

Disclosure of Invention

The invention aims to provide a vacuum leakage inspection device based on a differential pressure method, which has simpler structural arrangement and convenient use, and can improve the convenience of field operation and efficiency.

The technical scheme of the invention is as follows: the utility model provides a vacuum leakage verifying attachment based on differential pressure method, it includes the vacuum cover, pulls out and inserts formula trachea, vacuum pump and portable lithium cell group, the vacuum cover through pulling out and inserting formula trachea and vacuum pump connection, the vacuum pump is connected with portable lithium cell group.

The vacuum cover include the panel, wherein, be equipped with the quick interface of trachea on the panel of vacuum cover, the panel of vacuum cover is fixed with the illumination support frame, is fixed with on the panel of vacuum cover and inserts the vacuum table fast, is fixed with adjusting valve on the panel of vacuum cover, is fixed with human engineering handle on the panel of vacuum cover, is fixed with the adjustable nut on the vaccum finish coat board, the bottom of vaccum finish coat board is fixed with cladding formula sealing strip.

The lighting support frame is made of carbon steel.

And the lighting support frame is provided with a strip type LED lamp source.

The strip type LED lamp source is fixed on the illumination support frame through the permanent magnetic base on the back surface.

The bottom of the vacuum cover is attached with a waterproof protection ring, and the waterproof protection ring is fixed to the bottom of the vacuum cover by adopting waterproof glue.

The quick-plugging vacuum meter is fixed on the vacuum cover panel by adopting a sealing threaded interface.

The vacuum cover is integrally formed by transparent polycarbonate.

The ergonomic handle is secured to the panel of the vacuum housing with screws.

The invention has the beneficial effects that:

(1) the device is suitable for any complex environment such as any operation site, high altitude, outdoor, power failure area, underground, container and the like;

(2) the weight is light, the transportation is convenient, and the number of the equipment personnel is reduced to 2 compared with that of other models of equipment personnel, so that the operation efficiency is improved;

(3) waterproof sealing, reliability and maintenance performance are improved, and the service cycle reaches 1000 times;

(4) the cladding type sealing structure can quickly clad the welding line and ensure that the vacuum degree is not reduced within 5 s.

Drawings

FIG. 1 is a schematic connection diagram of a vacuum leakage inspection device based on a differential pressure method according to the present invention;

FIG. 2 is a schematic front view of a vacuum cap structure of a vacuum leakage inspection device based on a differential pressure method according to the present invention;

fig. 3 is a schematic side view of a vacuum cover structure of a vacuum leakage inspection device based on a differential pressure method according to the present invention.

In the figure, 1 vacuum cover, 2 pull-plug type trachea, 3 vacuum pumps, 4 portable lithium battery packs, 5 trachea quick interfaces, 6 lighting support frames, 7 quick plug vacuum meters, 8 regulating valves, 9 human engineering handles, 10 strip type LED lamp sources, 11 waterproof protective rings, 12 adjustable nuts and 13 cladding type sealing strips.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

The utility model provides a vacuum leakage verifying attachment based on differential pressure method, it includes the vacuum cover, pulls out and inserts formula trachea, vacuum pump and portable lithium cell group, the vacuum cover through pulling out and inserting formula trachea and vacuum pump connection, the vacuum pump is connected with portable lithium cell group.

The vacuum cover include the panel, wherein, be equipped with the quick interface of trachea on the panel of vacuum cover, the panel of vacuum cover is fixed with the illumination support frame, is fixed with on the panel of vacuum cover and inserts the vacuum table fast, is fixed with adjusting valve on the panel of vacuum cover, is fixed with human engineering handle on the panel of vacuum cover, is fixed with the adjustable nut on the vaccum finish coat board, the bottom of vaccum finish coat board is fixed with cladding formula sealing strip.

The lighting support frame is made of carbon steel.

And the lighting support frame is provided with a strip type LED lamp source.

The strip type LED lamp source is fixed on the illumination support frame through the permanent magnetic base on the back surface.

The bottom of the vacuum cover is attached with a waterproof protection ring, and the waterproof protection ring is fixed to the bottom of the vacuum cover by adopting waterproof glue.

The quick-plugging vacuum meter is fixed on the vacuum cover panel by adopting a sealing threaded interface.

The vacuum cover is integrally formed by transparent polycarbonate.

The ergonomic handle is secured to the panel of the vacuum housing with screws.

As shown in fig. 1, a vacuum leakage inspection device based on a differential pressure method includes a vacuum cover 1, a plug-in type air pipe 2, a vacuum pump 3 and a portable lithium battery pack 4, wherein the vacuum cover 1 is connected with the vacuum pump 3 through the plug-in type air pipe 2, and the vacuum pump 3 is connected with the portable lithium battery pack 4.

As shown in figure 2, the vacuum cover 1 comprises a panel, an air pipe quick connector 5, an illumination support frame 6, a quick-plug vacuum meter 7, an adjusting valve 8, an ergonomic handle 9, a strip-shaped LED lamp source 10, a waterproof protection ring 11, an adjustable nut 12 and a coated sealing strip 13, wherein the air pipe quick connector 5 is installed on the panel of the vacuum cover 1, the illumination support frame 6 is fixed on the panel of the vacuum cover 1 through screws, the quick-plug vacuum meter 7 is fixed on the panel of the vacuum cover 1 through a sealing threaded connector, the adjusting valve 8 is rotationally fixed on the panel of the vacuum cover 1, the ergonomic handle 9 is fixed on the panel of the vacuum cover 1 through screws, the strip-shaped LED lamp source 10 is fixed on the carbon steel illumination support frame 6 through a permanent magnetic base on the back side, the waterproof protection ring 11 is attached to the bottom of the vacuum cover 1, the adjustable nut 12 is rotationally fixed on the panel of the vacuum cover 1, The cladding sealing strip 13 is fixed to the bottom of the vacuum hood 1 by waterproof glue.

Wherein, vacuum chamber 1 adopts transparent polycarbonate integrated into one piece, has guaranteed vacuum chamber 1's full transparency, does not have the viewpoint that can not observe, can provide the observation viewpoint of full aspect, very big improvement the on-the-spot inspection effect. The pluggable air pipe 2 is convenient for quick replacement on site, and has higher maintenance performance compared with other types of structures; the portable lithium battery pack 4 adopts the standard high-power storage capacity of 48V20AH, and continuous and durable operation is guaranteed under the condition of no power supply or power failure outdoors. The illumination support frame 6 is used for supporting the strip type LED lamp source 10, the lamp source can provide illumination exceeding 1000Lx within 0.2m, the probability of detection omission of defects and display is smaller under sufficient illumination, and the angle of the light source can be adjusted according to the field state. The regulating valve 8 is used for controlling the air pressure in the vacuum cover 1, can be continuously regulated and can be adjusted according to the requirement. The ergonomic handle 9 is a supporting point which needs to be pressurized during inspection, so that inspection personnel can conveniently meet the fitting requirement of the vacuum cover under a labor-saving condition, and the labor intensity of the inspection personnel is reduced. The waterproof protective ring 11 is a protective structure which is designed for leakage detection and needs a foaming agent, wherein the foaming agent belongs to liquid and can permeate into an electrical element. The cladding sealing strip 13 is made of wider and softer sealing foam, and has better sealing performance.

The working process of the invention is as follows:

after the installation is finished, the vacuum cover 1, the plug-in type air pipe 2, the vacuum pump 3 and the portable lithium battery pack 4 are connected, and the problems of normal connection, no wrong connection and looseness of each interface are confirmed. And after the normal operation is confirmed, starting a switch of the portable lithium battery pack 4, starting the vacuum pump 3, hearing the rotation sound of the vacuum pump 3, indicating that the vacuum pump 3 works normally, and brushing a foaming agent on the surface of the welding line, wherein the brushing area is larger than that of the vacuum cover. After brushing, holding the ergonomic handle 9 with both hands, forcibly pressing the vacuum cover 1, observing the reading of the rapid plug-in vacuum meter 7, and rotating the pointer until the vacuum degree reaches a certain requirement.

The functions of the invention are as follows:

(1) the lighting auxiliary can provide light sources of more than 1000lx and adjust the angle of the light sources;

(2) the whole range of transparent materials has no blind area at the observation viewpoint;

(3) the structure is integrally formed, and the external mobile power supply is used for outdoor or power-off working conditions.