CN202631218U

CN202631218U - Leakage detecting device

Info

Publication number: CN202631218U
Application number: CN 201220207417
Authority: CN
Inventors: 方兴武
Original assignee: HUANGSHAN KENENG AUTO RADIATOR CO Ltd
Current assignee: HUANGSHAN KENENG AUTO RADIATOR CO Ltd
Priority date: 2012-05-10
Filing date: 2012-05-10
Publication date: 2012-12-26
Anticipated expiration: 2022-05-10

Abstract

The utility model relates to a leakage detecting device, comprising a cylinder body and a piston arranged in the cylinder body. A cavity inside the cylinder body is divided into a first cavity and a second cavity which are separated by the piston; a piston rod is arranged on the piston; a plug for blocking a pipeline opening of a workpiece is arranged on an end head extending outside the cylinder body of the piston rod; a first through hole and a second through hole, which are connected with a gas source, are respectively arranged in side walls of the first cavity and the second cavity; the piston rod is formed by a pipe body; and an air inflation channel formed in the pipe body is respectively communicated with a connection pipe and the first cavity/the second cavity. Gas is rapidly filled into the first cavity or the second cavity, which is separated from the air inflation channel, and the piston is pushed by the gas, so as to drive the plug to rapidly block the connection pipe. Meanwhile, the gas is filled into the other cavity, so that the gas is inflated into the workpiece through the air inflation channel, so as to realize the rapid leakage detection of the workpiece.

Description

A kind of leakage detection apparatus

Technical field

The utility model relates to heating radiator production equipment field, is specifically related to a kind of leakage detection apparatus that is used for the heating radiator leak detection.

Background technology

Heating radiator is after frock is accomplished; Need detect the welding quality of each pad on it and the crudy of radiating tube; Detection method commonly used at present is that gas is poured in the inside of heating radiator; Make heating radiator inside reach certain pressure, detect, judge the welding quality that goes up each pad of heating radiator and the crudy of radiating tube with this through impermeability to heating radiator at this moment.Therefore in producing for large batch of serialization, need provide a kind of can carry out fast sealing to heating radiator, and in heating radiator, pours the leakage detection apparatus of gas fast, improves detection efficiency and reduces production costs.

Name is called " the leak detection unit and the leakage detection apparatus with this leak detection unit that are used for closed conduit " Chinese patent document (CN201765100U) and discloses a kind of leakage detection apparatus that is used to hunt leak; It comprises the piston block that is provided with in cylinder body and the cylinder body; Cylinder body is divided into two chambers to piston block and piston block is provided with the piston rod that extends to the cylinder body outside; The outside termination of piston rod is provided with the sprue that pipeline is stopped up, and breather line is set respectively on two chambers, through pouring gas to two chambers; Thereby make piston rod drive to be positioned at the sprue in the pipeline outside to move with respect to pipeline opening, thus realize pipeline outlet obstruction and open.Though this leakage detection apparatus can stop up pipe outlet; But it also needs be provided with an aerating device more when detection is bubble-tight; Inflation detects the aerating device of establishing through other to interior; And could detect workpiece must make the pressure of the chamber that pressure in the cylinder body is bigger greater than the pressure of interior the time, its complicated operation and whole operation time are long.

The utility model content

The purpose of the utility model provides a kind of leakage detection apparatus, can stop up fast and inflate to interior the workpiece connecting pipe, realizes the quick leak-checking of workpiece.

For realizing above-mentioned purpose; The utility model has adopted following technical scheme: a kind of leakage detection apparatus; Comprise the piston that is provided with in cylinder body and the cylinder body; Described piston is separated into isolated each other first chamber and second chamber with the cylinder interior cavity; Said piston is provided with piston rod, and described piston rod extends to the outside termination of cylinder body and is provided with the plug that the workpiece pipeline opening is stopped up, and offers first through hole and second through hole that link to each other with source of the gas on the sidewall of described first and second chamber of formation respectively; It is characterized in that: described piston rod is that a body constitutes, and the filling channel that constitutes in the said body is connected with connecting pipe and first chamber/second chamber respectively.

Through will drive piston rod that plug moves be arranged to hollow shaft-like and its constitute filling channel and be connected with the connecting pipe of workpiece and first chamber or second chamber respectively; So at first to isolated first chamber of filling channel or second chamber in charge into gas fast; Gas promotes piston, thereby drives the quick obstruction of plug to connecting pipe, in another chamber, pours gas simultaneously; Gas then can pass through filling channel and inflate to interior, thereby realizes the quick leak-checking of workpiece.

Description of drawings

Fig. 1,2,3,4, the 5th, five kinds of embodiments of the utility model;

Two kinds of assembling synoptic diagram of Fig. 6,7 the utility model and workpiece pipeline opening.

Embodiment

The utility model primary and foremost purpose provides a kind of leakage detection apparatus that can seal and inflate workpiece fast; Its scheme of taking does; A kind of leakage detection apparatus; Comprise cylinder body 10 and the cylinder body 10 interior pistons 11 that are provided with, described piston 11 is separated into isolated each other first chamber 21 and second chamber 22 with cylinder body 10 internal cavities, and said piston 11 is provided with piston rod 12; Described piston rod 12 extends to cylinder body 10 outside terminations and is provided with 30 mouthfuls of plugs that stop up 13 of workpiece pipeline; Offer first through hole 211 and second through hole 221 that link to each other with source of the gas on the sidewall of first and

second chamber

21,22 of described formation respectively, described piston rod 12 is that a body constitutes, and the filling channel 12 ' that constitutes in the said body is connected with connecting pipe 30 and first chamber, 21/ second chamber 22 respectively.

Be arranged to hollow shaft-like through driving the piston rod 12 that plug 13 moves; When the connecting pipe 30 that on 13 pairs of workpiece of piston rod 12 drive plugs, is provided with like this stops up; Also can inflate to interior through piston rod 12 inner filling channels 12 '; Thereby make interior form sealing area fast, thereby realize quick leak-checking workpiece with certain pressure.

Be depicted as first kind of embodiment of the utility model like Fig. 1,2, the Ban Mianchu that said piston 11 is connected with piston rod 12 offers third through-hole 111, and the described filling channel 12 ' and second chamber 22 are connected through third through-hole 111.Said plug 13 constitutes for resilient material, and said plug 13 diameters are slightly less than the interior bore of connecting pipe 30.In this embodiment, initial state is put into connecting pipe 30 with plug 13, through pouring gas from first through hole 221; Gas will be full of first chamber, 21 inside, thereby promotes piston 11, drives plug 13 to the lateral movement near cylinder body 10; Because; Be provided with saddle 14 between said plug 13 and the cylinder body 10, the middle part of said saddle 14 offers the through hole that supplies piston rod 12 to pass through, the outer face of said saddle 14 and the corresponding layout of the inner face flush of plug 13.Will be when therefore plug 13 leans with saddle 14 by axial compression, the radial diameter of plug 13 will become greatly like this, thereby makes plug 13 that connecting pipe 30 mouths of pipe are firmly stopped up.Plug 13 is inflated to interior from second through hole 221 after connecting pipe 30 is stopped up again, thereby makes interior be in the state that seals and have certain air pressure fast.Here in the process that workpiece is inflated, should make all the time again gas in the chamber 21 of winning to the acting force of piston 11 greater than gas in second chamber 22 to the acting force of piston 11.

More concrete; Can be by following scheme implementation, the middle part of said plug 13 offers the counterbore shape through hole that matches with piston rod 12 termination portions, is about to plug 13 inner through holes and is arranged to stepped hole; And the large aperture section is positioned at the first side in outer end of piston rod 12; Described piston rod 12 and plug 13 are for threaded engagement is connected, and described plug 13 outer circumference diameter axially reduce along it gradually, and the bigger end of diameter is positioned at the side near cylinder body 10; Also be about to be arranged to a tapered tube, and bigger near the radial diameter of cylinder body 10 1 side ends.Described first and second through hole 211,221 is provided with respectively along two outer ends of piston 11 movings range, and described fourth hole 121 is between first through hole 211 and piston 11.Nut 122 through being provided with compressed plug 13 with cooperating of saddle 14, realized the increase of plug 13 radial outer diameter, and simultaneously with plug 13 tapered tubular, its effect also is to be convenient to plug 13 can put into connecting pipe 30 fast, realizes leak detection fast.

The another kind of embodiment of the utility model does, like Fig. 3,4, shown in 5, said piston rod 12 is positioned on the shaft of first chamber 21 and offers fourth hole 121, and the described filling channel 12 ' and first chamber 21 are connected through fourth hole 121.Through on piston rod 12 shafts, offering fourth hole 121, so just the filling channel 12 ' and first chamber 21 are connected, plug 13 was the outside that is positioned at connecting pipe 30 before stopping up in this embodiment; During practical implementation, can choose plug 13 is arranged to a cone, the minimum diameter of cone is less than the interior bore of connecting pipe 31; The maximum gauge of cone is greater than the interior bore of connecting pipe 31; So at first in second chamber 22, pour gas, thereby make piston rod 12 promote plugs near the motion of connecting pipe 30 mouths of pipe, thereby connecting pipe 30 mouths of pipe are stopped up; Inflation in first chamber 21 again, thus realize interior is inflated.

The utility model preferably selects for use first embodiment to implement in the specific implementation, and it need not be provided with the fixedly support of cylinder 10, can hunt leak to workpiece.When leak detection, need not add workpiece yet and hold in addition, be specially adapted to the workpiece that some are not easy to clamping with clamping device; Like heating radiator; Its radiating tube and heat radiator that constitutes on the heating radiator all is that thin aluminium alloy constitutes, and adds to hold to make radiating tube, heat radiator be out of shape easily, influences product quality.

In addition; Because this kind equipment of picture heating radiator is for aluminum alloy materials constitutes, oxidized easily in water environment mostly; Therefore whether be difficult for that the workpiece after this type of sealing inflation is put into the pond bubble occurs and carries out impermeability and judge through observing; The running time of this mode of operation while is long, and after impermeability detects, also need spray dried and the oven dry processing to workpiece, entire process technological operation complicacy.Therefore the further scheme of the utility model does, offers the fifth hole 212,222 that is used to be provided with pressure transducer on the sidewall of said formation first chamber 21 and/or second chamber 22, and described pressure transducer links to each other with the pressure indicating member.After the Work piece sealing inflation reaches certain pressure, whether change like this through the pressure value of observing on the pressure indicating member, thus the impermeability of judgement workpiece, and further welding quality and the crudy to workpiece detects.

Like Fig. 6, shown in 7; The utility model can stop up inflation to each connecting pipe 30 on the workpiece respectively through a plurality of pick-up units are set in the specific implementation; A pick-up unit also can be set certainly, and the connecting pipe 30 of other workpiece adopts other devices to stop up.Through in first chamber 21 or second chamber 22, pouring gas, thereby make piston 11 drive piston rods 12 and plug 13 near connecting pipe 30 motions or make the outer circumference diameter of plug 13 become big, thereby realize obstruction connecting pipe 30; In another chamber, pour gas simultaneously, gas flows into interior through gas ducting, thereby realizes the inflation of interior; When pressure arrives certain value, stop inflation, whether change through the data of observing the indication of pressure indicating member the impermeability of workpiece is judged; As, numerical value does not change then favorable sealing property, and promptly welding quality and crudy meet the requirements; Otherwise, then have problems.After detection finishes; To exit to what 13 pairs of connecting pipes 30 of control plug stopped up, thereby pick-up unit integral body is separated with workpiece, next workpiece is hunted leak; Shown in Fig. 1～7; The utility model can carry out sealing to workpiece fast and detect, and increases production efficiency, saves production cost.

Claims

1. leakage detection apparatus; Comprise the piston (11) that is provided with in cylinder body (10) and the cylinder body (10); Described piston (11) is separated into isolated each other first chamber (21) and second chamber (22) with cylinder body (10) internal cavities; Said piston (11) is provided with piston rod (12); Described piston rod (12) extends to the outside termination of cylinder body (10) and is provided with the plug (13) that connecting pipe (30) mouth of pipe that is provided with on the workpiece is stopped up; Offer first through hole (211) and second through hole (221) that link to each other with source of the gas on the sidewall of said first and second chamber (21,22) respectively; It is characterized in that: described piston rod (12) is that a body constitutes, and the filling channel (12 ') that constitutes in the said body is connected with connecting pipe (30) and first chamber (21)/second chamber (22) respectively.

2. leakage detection apparatus as claimed in claim 1; It is characterized in that: the Ban Mianchu that said piston (11) is connected with piston rod (12) offers third through-hole (111), and described filling channel (12 ') and second chamber (22) are connected through third through-hole (111).

3. leakage detection apparatus as claimed in claim 1; It is characterized in that: said piston rod (12) is positioned on the shaft of first chamber (21) and offers fourth hole (121), and described filling channel (12 ') and first chamber (21) are connected through fourth hole (121).

4. leakage detection apparatus as claimed in claim 1; It is characterized in that: offer the fifth hole (212,222) that is used to be provided with pressure transducer on the sidewall of said formation first chamber (21) and/or second chamber (22), described pressure transducer links to each other with the pressure indicating member.

5. leakage detection apparatus as claimed in claim 1 is characterized in that: said plug (13) constitutes for resilient material, and said plug (13) diameter is slightly less than the interior bore of connecting pipe (30).

6. leakage detection apparatus as claimed in claim 4; It is characterized in that: be provided with saddle (14) between said plug (13) and the cylinder body (10); The middle part of said saddle (14) offers the through hole that supplies piston rod (12) to pass through, the outer face of said saddle (14) and the corresponding layout of the inner face flush of plug (13).

7. leakage detection apparatus as claimed in claim 3; It is characterized in that: described first and second through hole (211,221) is provided with respectively along two outer ends of piston (11) moving range, and described fourth hole (121) is positioned between first through hole (211) and the piston (11).

8. leakage detection apparatus as claimed in claim 6; It is characterized in that: the middle part of said plug (13) offers the counterbore shape through hole that matches with piston rod (12) termination portion; Described piston rod (12) is connected for threaded engagement with plug (13); Described plug (13) outer circumference diameter axially reduces along it gradually, and the bigger end of diameter is positioned at the side near cylinder body (10).