CN2033900U

CN2033900U - Portable vacuum leak detector for weld seams on pipeline

Info

Publication number: CN2033900U
Application number: CN 87216481
Authority: CN
Inventors: 刘万宝
Original assignee: Oil Field Construction Co Daqi
Current assignee: Oil Field Construction Co Daqi
Priority date: 1987-12-18
Filing date: 1987-12-18
Publication date: 1989-03-08

Abstract

Disclosed is a portable vacuum leak detector for weld seams on a pipeline, which belongs to a professional leak detecting tool for weld seams on a pipeline. The utility model, which is like a flexible casing of an opening tyre cover of a wheel, automatically embraces in the course of forming vacuum with a detected object, and if the detection agent, coated on the welding seams in advance, discovers foaming, holes need to be welded. The utility model has the advantages of simple structure, high work efficiency, portability and simultaneously operation of welding and detection, and comprises a partial annular flexible casing (1), an observation window (2), a handgrip (3), aspiration and air intake holes (11, 10), a vacuum pump, etc. Compared with the positive-pressure detection method, the energy consumption is reduced by 80%.

Description

Portable vacuum leak detector for weld seams on pipeline

A kind of instrument that is used for the pipe welding port leak detection.

The pipe welding port leak detection is an important step of pipeline construction.Method commonly used is that the blind plate of burn-oning at two ends connects compressed air source after the whole pipe weldering connects, and injects 5.86610 in pipe ⁵The pressurized air of * Pa is smearing detection agent by weld bond then, as the class I liquid I of suds, find that small opening carries out repair welding.This leak hunting method time is long, influence the carrying out of other operation, also a kind of waste on the whole construction engineering, as finding or suspecting that the somewhere is leaky, also need to inflate detection behind complete the pipeline to be welded, real belong to less, slowly, poor, the pipe welding port leak hunting method that take, very unbecoming with the prominent epoch that fly of current science and technology, spy's proposition the design.

The design's purpose: at the backward detection method of pipe welding port that prior art adopts, design the detection of negative pressure device that is convenient for carrying and detects, after having welded, one weld bond detect immediately, find leak repair welding at any time, do not influence the carrying out of other program of pipeline construction, reduce the energy, shorten construction period.

Description of drawings:

Fig. 1 is that weld bond sniffer axle is surveyed diagrammatic sketch

Fig. 2 is that weld bond sniffer master looks partial sectional view

Fig. 3 is Fig. 2 side cutaway view

Design this leak detector according to tested solder skip mouth body diameter size, can be processed into series of products. The technical characterictic of leak detector: form a sealing observation ward with tested leak, suction, air admission hole ［ 10,11 ］ that connection is arranged on the chamber, it is to adopt the rubber that meets the HG-332-66 standard to make such as the elastic shell ［ 1 ］ like the opening car wheel covering, about one liter of room volume, at housing ［ 1 ］ ring surface edge Packed lucite transparent body observation window ［ 2 ］, fixing portable control frame ［ 9 ］ is arranged in its side; Lifting trigger ［ 4 ］ is arranged in portable control frame ［ 9 ］, and it is that lifting was not slided during embedding two stake pockets ［ drew ］; The upper end floor beam of frame ［ 9 ］ is the sealed tube handle ［ 3 ］ with air admission hole ［ 12 ］, is communicated with sealed tube handle ［ 3 ］, air admission hole ［ 10 ］ respectively with flexible pipe ［ 15 ］; For making elastic shell ［ 1 ］ and being sealed better by the leak detection body, at elastic shell ［ 1 ］ inside and outside straight, beveled edge ［ 13,14 ］ is arranged; Because elastic shell ［ 1 ］ separates with the frequent obvolvent of body of being hunted leak; for protecting its end beveled edge ［ 14 ］ not frayed; approach the place with ［ 14 ］ one protection mast ［ 6 ］ is arranged; it is connected with lever ［ 8 ］ one ends on being fixed on housing ［ 1 ］ side; lever ［ 8 ］ is to be fixed on the housing ［ 1 ］ by bearing pin ［ 7 ］; be tied with a back-moving spring on the bearing pin ［ 7 ］ and ［ do not draw ］, be connected with trigger ［ 4 ］, lever ［ 8 ］ respectively with backguy ［ 5 ］. Protection mast ［ 6 ］ when leak detector is idle and in the front of beveled edge ［ 14 ］.

When need are hunted leak, be communicated with suction hole ［ 10 ］, vacuum pump with flexible pipe ［ 15 ］, on weld bond, coat detection agent,, hold pipe handle ［ 3 ］ and seal air admission hole ［ 12 ］ as suds, up in this cocking ［ 4 ］, rotate by connecting part backguy ［ 5 ］ pulling two levers ［ 8 ］, make two protection masts of symmetry outwards open a certain angle, elastic shell ［ 1 ］ the obvolvent weld bond pipe fitting of being hunted leak, be big pipe fitting generally, can design partly obvolvent leak detection by leak detection; Little pipe fitting can design whole obvolvent leak detections; connect vacuum-pump power supply afterwards; form negative pressure immediately in the housing ［ 1 ］ and hold sealing tightly; reaction by detection agent can find have seamless or leak by view window ［ 2 ］; then staff breaks away from pipe handle ［ 3 ］; air admission hole ［ 12 ］ knot seals and air inlet; the this moment and the air entry pressure equilibrium of vacuum pump; pump is in light condition; elastic shell ［ 1 ］ finishes the obvolvent sealing and takes off; the leak source repair welding of finding is hunted leak again, this moment trigger ［ 4 ］ and protect mast ［ 6 ］ under bearing pin ［ 7 ］ upper reset spring effect and reset.

The design's weld bond detecting device, simple structure, cost is low, and is small and exquisite, can be portable portable, the convenient use, easy and simple to handle, the leak detection of internal and external anti-corrosive pipe welding port is done at the scene of being suitable for; Detect effect and be not less than employing 5.866 * 10 ⁵The positive pressure leakage-detecting method of Pa promptly is pressed into the air leak detecting in pipe; But this sniffer detects to compare with malleation and cuts down the consumption of energy 80%, improves work efficiency 4-8 doubly; With detection, carry out, and promptly works continuously, and is the very welcome weld bond sniffer in pipe welding port scene by the operation that does not influence postwelding with weldering for this sniffer simultaneously.

Claims

1, a kind of pipe welding port sniffer that is used for, dynamic source, detection agent is characterized in that: form a sealing observation ward with detected place, suction, the air admission hole [10,11] of connection arranged on the chamber.

2, pipe welding port sniffer as claimed in claim 1, it is characterized in that: sealing observation ward is formed by the cyclic spring housing ［ 1 ］ with the weld bond obvolvent of being hunted leak, housing ［ 1 ］ is put sealed transparent view window ［ 2 ］ on the surface, and there is fixing portable control frame ［ 9 ］ side.

3, pipe welding port sniffer as claimed in claim 2, it is characterized in that: it is the sealed tube handle ［ 3 ］ with air admission hole ［ 12 ］ that lifting trigger ［ 4 ］, upper end are arranged in the portable control frame ［ 9 ］, is communicated with sealed tube handle ［ 3 ］, air admission hole ［ 11 ］ respectively with flexible pipe ［ 15 ］;

4, pipe welding port sniffer as claimed in claim 2 is characterized in that: cyclic spring housing ［ 1 ］ has inside and outside straight, beveled edge ［ 13,14 ］.

5, pipe welding port sniffer as claimed in claim 2 is characterized in that: the beveled edge ［ 14 ］ on elastic shell ［ 1 ］ has been located a watch box ［ 6 ］, and it is connected with truck dead lever ［ 8 ］, backguy ［ 5 ］, trigger ［ 4 ］.