CN201130078Y

CN201130078Y - Weld joint close test vacuum device

Info

Publication number: CN201130078Y
Application number: CNU2007201875646U
Authority: CN
Inventors: 吴其胜; 邹小锐
Original assignee: CSSC Guangzhou Huangpu Shipbuilding Co Ltd
Current assignee: CSSC Guangzhou Huangpu Shipbuilding Co Ltd
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2008-10-08
Anticipated expiration: 2017-12-21

Abstract

The utility model relates to a weld joint sealing type vacuum device, which relates to a vacuum device, in particular to a vacuum device which is used for weld joint hemeticity test for outer boards of ships. The utility model is characterized in that the vacuum device mainly comprises a vacuum generator 6 whose one end is connected with a ball valve 7 through a joint 5, and the other end is connected with a joint 5, and the outlet on the lower end of the vacuum generator 6 is also connected with a joint 5, and the lower end of the joint is also connected with a triplet joint 4, the lower port of the triplet joint 4 is butt jointed with a through hole 11 on the center of an organic glass plate 1 through a joint 3, and the lower end of the organic glass plate is connected with a ring of adhesive tape 2. The vacuum device has the advantages of simple structure and convenient application, which saves the time of weld joint sealing, simultaneously and greatly lightens work intensity of workers, and improves work efficiency.

Description

The close examination vacuum plant of a kind of weld seam

Technical field

The utility model is a kind of vacuum plant, especially for the vacuum plant of outboard plate welding seams impermeability test.

Background technology

Boats and ships come into operation after building up, owing to reasons such as marine corrosion and averages, hull is outer to be renewed with needs, for the high weld seam of some sealing requirements, the close examination of weld seam is indispensable naturally, the close examination of weld seam can be adopted and be coated with kerosene, bath, setting-out, calm the anger and vacuumize methods such as (negative pressure), it is not high to be coated with the kerosene reliability, the bath working condition is poor, for some loading liquid cabins, can adopt method butt welded seams such as setting-out, inflation to carry out close examination, the close examination of setting-out is as finding that weld seam leaks, solid carbon dioxide need be put in the cabin, carries out weld seam again and repairs, and delays the cycle; Calm the anger and then will do frock, waste time and energy, repair for the outside plate in some mechanical cabins, above method is all inapplicable, can only be to adopt the method that vacuumizes to check, shiprepair be in the past adopted vacuum (-tight) housing to weld and is doubted the close examination of seam, form vacuum by electric vacuum pump, but vacuum (-tight) housing is relatively heavier, it is not high to form vacuum sensitivity, needs three, four people or closely withstanding vacuum (-tight) housing could form vacuum with thousand, the very difficult operation, waste time and energy, service efficiency is extremely low.

The utility model content

The purpose of this utility model is to design the close examination vacuum plant of a kind of volume a kind of weld seam little, easy to use.

The close examination vacuum plant of a kind of weld seam, it is characterized in that, it mainly is made of vacuum generator 6, one end of vacuum generator 6 is connected to ball valve 7 by joint 5, the other end is connected with a joint 5, and the exit of the lower end of described vacuum generator 6 also is connected with a joint 5, and the lower end of this joint 5 connects a three-way connection 4 again, three-way connection 4 lower port are docked by the through hole 11 of joint 3 with poly (methyl methacrylate) plate 1 centre, are connected with a circle adhesive tape 2 in the lower end of poly (methyl methacrylate) plate 1.

The Centronics port of described three-way connection 4 is connected with pressure vacuum gauge 8.

Described vacuum generator 6 is made of tubular shell 61, jetting pump 62, through hole one end that jetting pump 62 inserts in the tubular shell 61 is tightly connected, the nozzle 621 of described jetting pump 62 is tapered, jetting pump 62 is diffuser casings 63 with the space of the inwall formation of tubular shell 61, and outlet 64 is arranged on the tubular shell 61 of the lower end of diffuser casing 63.

The utility model is simple in structure, and is easy to use, saved the time of the close examination of weld seam, also alleviated working strength of workers greatly simultaneously, improved work efficiency.

Description of drawings

Fig. 1, the utility model structural representation;

Fig. 2, the utility model vacuum generator 6 structural representations.

Wherein 1 is the machine glass plate, and 11 is through hole, and 2 is adhesive tape, and 3 is joint, and 4 is three-way connection, and 5 is joint, and 6 is vacuum generator, and 61 is tubular shell, and 62 is jetting pump, and 621 is nozzle, and 63 is diffuser casing, and 64 are outlet, and 7 is ball valve, and 8 is pressure vacuum gauge.

Embodiment

Vacuum plant main element of the present invention is that vacuum forms device, and it is level and smooth by one section and nozzle that Taper Pipe that shrink constitutes, and an end and Working-fluid intaking pipe be the limit mutually, and another section links to each other with suction chamber.The mixing chamber of forming by conical tube (trunnion) and cylindrical tube that is connected with suction chamber, the Taper Pipe that the cross section is expanded gradually is the preceding termination mixing chamber of diffuser pipe, the rear end is connected with vent pipe.The work that vacuum forms device roughly can be three processes: course of injection, draw journey and the diffusion process sneaked out.According to ejector principle, utilize the working fluid of high-voltage high-speed to spray exactly from nozzle, around nozzle, form vacuum, thereby take away the fluid of periphery.The nozzle endoporus is taper or clear opening, and the outside is processed as taper.Add large diameter in the hole of nozzle front and replace diffuser casing.

The actuating medium of vacuum generating device can be water under high pressure or pressurized air etc., and weld seam needs polishing when considering welding, and pressurized air need not to socket airduct again, thus we to adopt pressurized air be the actuating medium of aspiration vacuum.

After boats and ships build up and come into operation, owing to reasons such as marine corrosion and averages, ship hull plate need renew, because this weld seam directly contacts with water, exist if any pore or other defective, boats and ships will stay hidden danger to safety of ship production under the stressed effect in seawater, therefore must guarantee the watertightness of outside plate.

Using method: the form of selecting sealing of the present utility model according to the characteristics of weld seam for use, in the workshop, test earlier with steel plate, the place connects airduct at the inlet end ball valve, open the whole apertures of valve, the pressurized air that feeds 0.6Mpa is taken away the air of suction chamber, because suction chamber is hedged off from the outer world and does not have air to enter, and the air on top is constantly taken away indoor air and form vacuum, vacuum tightness by the high-speed internal spool reach top pressure (～0.5Mpa), the flow that aperture that simultaneously can control valve is controlled air reaches the regulating effect of vacuum tightness.Vacuum pressure can directly be read by tensimeter, is difficult to its group got off as free existence, and only needs this moment pressurized air is closed, and suction chamber enters extraneous air at once can remove vacuum plant.

On the weld seam that has been shaped, test, coat earlier suds in welded joints, cover upper glass cover, connect airduct, open valve, gently press cloche, in case sealing can be set up vacuum in forming 3 seconds, observe the suds bubble whether on the weld seam, to determine whether in the weld seam be pore.Because organic glass is flexible, also can be used for the close examination of the less weld seam of some radians.

Claims

1, the close examination vacuum plant of a kind of weld seam, it is characterized in that, it mainly is made of vacuum generator (6), one end of vacuum generator (6) is connected to ball valve (7) by joint (5), the other end is connected with a joint 5, the exit of the lower end of described vacuum generator (6) also is connected with a joint (5), the lower end of this joint (5) connects a three-way connection (4) again, three-way connection (4) lower port is docked by the middle through hole (11) of joint (3) and poly (methyl methacrylate) plate (1), is connected with a circle adhesive tape (2) in the lower end of poly (methyl methacrylate) plate (1).

2, the close examination vacuum plant of a kind of weld seam according to claim 1 is characterized in that, the Centronics port of described three-way connection (4) is connected with pressure vacuum gauge (8).

3, the close examination vacuum plant of a kind of weld seam according to claim 1, it is characterized in that, described vacuum generator (6) is made of tubular shell (61), jetting pump (62), through hole one end that jetting pump (62) inserts in the tubular shell (61) is tightly connected, the nozzle (621) of described jetting pump (62) is tapered, jetting pump (62) is diffuser casing (63) with the space of the inwall formation of tubular shell (61), on the tubular shell (61) of the lower end of diffuser casing (63) outlet (64) is arranged.