CN103398296B - Airduct tightness method of testing - Google Patents
Airduct tightness method of testing Download PDFInfo
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- CN103398296B CN103398296B CN201310322186.8A CN201310322186A CN103398296B CN 103398296 B CN103398296 B CN 103398296B CN 201310322186 A CN201310322186 A CN 201310322186A CN 103398296 B CN103398296 B CN 103398296B
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Abstract
The invention discloses airduct tightness method of testing, comprise light leak method detection method, also comprise air leak test method, also comprise cigarette leak detection detection method; The invention has the advantages that: test accurately and reliably, can not cause bad reaction to airduct.
Description
Technical field
The present invention relates to the test of airduct tightness, i.e. airduct tightness method of testing and light leak test macro and Pressure testing system.
Background technology
For the airduct under clean environment, need the sealing of height, prevent outside dust from entering clean environment from Gas leak position, traditional airduct test generally adopts hydraulic pressure test, and this test mode can cause airduct to occur iron mold, therefore this kind of mode is generally used for the pipeline test of plastics.In order to solve the problem, the present invention needs to design a kind of apparatus and method that effectively can detect the sealing of airduct, ensures airduct not tested person impact simultaneously.
Summary of the invention
The object of the present invention is to provide the not tested person impact of a kind of airduct, detect airduct tightness method of testing and light leak test macro and Pressure testing system accurately simultaneously.
Implementation of the present invention is as follows: airduct tightness method of testing, comprises light leak method detection method; Described light leak method detection method comprises the steps:
Step 1, light source establishment step: adopt bulb, lampshade, electric wire to set up light source, lampshade is wrapped up bulb, electric wire and bulb are connected;
Step 2, airduct inner light source establishment step: light source step 1 established is placed in airduct;
Step 3, detecting step: under dark surrounds, dragging electric wire makes bulb and the lampshade path all along airduct under the effect of electric wire move on to, and whether observe the airduct of light source through position has light to penetrate, if there is light to penetrate, represent that airduct has leakage, if dull thread injection represents that airduct does not leak.
The dark surrounds mentioned in described light leak method detection method refers in darkroom or under night condition, the method adopts light source light leak method to test, if there is light leak, then significantly can discover, and repair this leak in time, compare traditional hydraulic pressure test method, simple operations more, equal energy arrives object light leak position accurately being detected, does not have the problem of rustiness of hydraulic pressure test method simultaneously, can reach beyond thought technique effect.Lampshade is set and can protects bulb, prevent when dragging bulb, to bulb-damage.While carrying out above-mentioned steps 3, in order to the maximized position of measuring small opening of energy, while the present invention drags electric wire in implementation step 3, airduct is made to rotate around its axis in the lump, make light source can airduct helically circuit advance, make light source be irradiated to small opening to greatest extent like this.Lampshade is hollow out or translucent construction composition, facilitates printing opacity.In order to security, the voltage of bulb not higher than 36V, power 100W.
Also comprise air leak test method, air leak test method comprises the steps:
Steps A, airduct sealing step: the arm be connected on airduct is taken off, and the opening part sealing that arm position will be taken off, simultaneously all the other ports of sealing air pipe keep a SAO;
Step B, air-supply arrangement installation steps: get centrifugal blower is arranged on airduct SAO place by orifice plate;
Step C, testing tool installation steps: be fit into air quantity differential manometer in orifice plate, at least one position in addition in airduct arranges static pressure differential manometer in a pipe separately;
Step D, detecting step: start centrifugal blower to airduct inner blower, keep this parameter value when making air quantity differential manometer display parameter value be X Pa, observe static pressure differential manometer in all pipes, if the parameter of static pressure differential manometer is consistent with the parameter that air quantity differential manometer shows in all pipes, represent that whole airduct is without leakage, if in don't bother about individual, the parameter of static pressure differential manometer is less than the parameter of air quantity differential manometer display, then represent that airduct exists small opening.
After above-mentioned light leak method detection method completes, record and all leak out a little, to leaking out, some fluid sealant is repaired.After the repair has been completed, whether also small opening is there is in order to proofread accurately, the present invention spy adopts above-mentioned air leak test method, air leak test method utilizes the sealing of Pressure testing airduct, differential manometer test intake and air output is utilized whether to there is change, if there is change, represent also there is small opening, if intake is consistent with air output, then represent to there is not small opening.
In this specific description air leak test method, air leak test method is according to steps A, step B, step C carries out after assembling completes, start centrifugal blower, now the air in the external world constantly pumps in this detection system by centrifugal blower, the air pressure in this detection system is made to reach X Pa, the data of air quantity differential manometer display are intake, i.e. centrifugal blower air quantity that this detection system is sent into, in pipe, static pressure differential manometer detects the air pressure in airduct, if data are less than the data of air quantity differential manometer in static pressure differential manometer in pipe, show necessarily also there is small opening, directly can judge whether this airduct also exists situation of leaking out by this detection method.Also as hydraulic pressure test method, iron mold can not be caused to airduct simultaneously.
Simultaneously, when also there is small opening in the explanation of air leak test method, because air is colorless and odorless, the position of small opening can not be shown intuitively, now also need people to go to go to experience this small opening point with hand, because the area of airduct is large, need the position of impression more, therefore can not detect this small opening point preferably, therefore conveniently detect small opening intuitively, also comprise cigarette leak detection detection method, cigarette leak detection detection method comprises the steps:
Step a, airduct sealing step: the arm be connected on airduct is taken off, and the opening part sealing that arm position will be taken off, simultaneously all the other ports of sealing air pipe keep a SAO;
Step b, air-supply arrangement installation steps: get centrifugal blower is arranged on airduct SAO place by orifice plate;
Step c, testing tool installation steps: be fit into air quantity differential manometer in orifice plate, at least one position in addition in airduct arranges static pressure differential manometer in a pipe separately;
Steps d, smoke devices installation steps: in orifice plate or airduct or centrifugal blower exit install smoke generating device;
Step e, detecting step: start smoke generating device, then centrifugal blower is started to airduct inner blower, keep this parameter value when making air quantity differential manometer display parameter value be X Pa, observe static pressure differential manometer in all pipes, if the parameter of static pressure differential manometer is consistent with the parameter that air quantity differential manometer shows in all pipes, represent that whole airduct is without leakage, if in don't bother about individual, the parameter of static pressure differential manometer is less than the parameter of air quantity differential manometer display, then represent that airduct exists small opening, when there is small opening, observe and find smog spillover position, this smog spillover position is small opening.
Cigarette leak detection detection method utilizes smog to the loss of small opening position under High Pressure, thus can observe this small opening easily, intuitively, convenient and reliable, also can not cause adverse consequences as hydraulic pressure test simultaneously.
Said method can repeatedly carry out repeatedly until there is not small opening phenomenon after all detecting.
The present invention utilizes various test, multiple technological means realizes comprehensive comprehensive test airduct, the sealing of critical guarantee airduct.The bad reaction (such as the generation of indentation, iron mold) of airduct can not be caused simultaneously.
Above-mentioned detection method can be carried out integrated testability and also can segmentation be tested.
Also there are air quantity controller installation steps, air quantity controller installation steps are: at centrifugal blower and excessively between orifice plate, be orifice plate direction be disposed with flow controller, honeycomb screen from centrifugal blower.
Flow controller, honeycomb screen, for controlling entering of air quantity, prevent air quantity overvoltage or low pressure.
Based on the light leak test macro of airduct tightness method of testing, comprise airduct, be provided with light source in airduct, light source comprises bulb, lampshade, electric wire, and lampshade parcel bulb, electric wire and bulb are connected, and electric wire is laid along airduct path.
Based on the Pressure testing system of airduct tightness method of testing, comprise the airduct of maintenance all the other port sealings of SAO, SAO place is provided with centrifugal blower by orifice plate, be provided with inlet air amount differential manometer in orifice plate, at least one position in addition in airduct arranges static pressure differential manometer in a pipe separately.
At centrifugal blower and excessively between orifice plate, be orifice plate direction from centrifugal blower and be disposed with flow controller, honeycomb screen.
In orifice plate or airduct or centrifugal blower exit install smoke generating device.Smoke generating device distributes smog.
Because airduct is when welding, may occur rosin joint phenomenon, adopt the test of light leak method in faulty soldered joint position, its result is not necessarily reliable, because, faulty soldered joint position can become perforate state from sealing state under hyperbaric environment, therefore needs to carry out pressurized seal detection, and namely blast detects, like this, under air pressure being brought up to system works overload state, when there is not small opening, could truly guarantee that airduct in use can not occur small opening again.Therefore, preferential step of the present invention is in proper order: first carry out light leak initial survey, is carrying out examining in blast, finally utilizes smog to find small opening and closes this small opening.The reliability that final guarantee detects.
The invention has the advantages that: test accurately and reliably, can not cause bad reaction to airduct.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of light leak test macro.
Fig. 2 is the schematic diagram of Pressure testing system.
Reference numeral in figure is: 1, lampshade; 2, bulb; 3, electric wire; 4, airduct; 5, centrifugal blower; 6, flow controller; 7, honeycomb screen; 8, inlet air amount differential manometer; 9, orifice plate; 10, smoke generating device; 11, static pressure differential manometer in pipe.
Embodiment
Embodiment 1
As shown in Figure 1, 2.
Airduct tightness method of testing, comprises light leak method detection method; Described light leak method detection method comprises the steps:
Step 1, light source establishment step: adopt bulb 2, lampshade 1, electric wire 3 to set up light source, lampshade is wrapped up bulb, electric wire and bulb are connected;
Step 2, airduct inner light source establishment step: light source step 1 established is placed in airduct 4;
Step 3, detecting step: under dark surrounds, dragging electric wire 3 makes bulb 2 and the path of lampshade 1 all along airduct under the effect of electric wire 3 move on to, whether observe the airduct of light source through position has light to penetrate, if there is light to penetrate, represent that airduct has leakage, if dull thread injection represents that airduct does not leak.
The dark surrounds mentioned in described light leak method detection method refers in darkroom or under night condition, the method adopts light source light leak method to test, if there is light leak, then significantly can discover, and repair this leak in time, compare traditional hydraulic pressure test method, simple operations more, equal energy arrives object light leak position accurately being detected, does not have the problem of rustiness of hydraulic pressure test method simultaneously, can reach beyond thought technique effect.Lampshade 1 is set and can protects bulb 2, when being placed on dragging bulb 2, to bulb-damage.While carrying out above-mentioned steps 3, in order to the maximized position of measuring small opening of energy, while the present invention drags electric wire 3 in implementation step 3, airduct is made to rotate around its axis in the lump, make light source can airduct helically circuit advance, make light source be irradiated to small opening to greatest extent like this.Lampshade 1 is hollow out or translucent construction composition, facilitates printing opacity.In order to security, the voltage of bulb not higher than 36V, power 100W.
Embodiment 2
As shown in Figure 1, 2.
The present embodiment also comprises air leak test method on the basis of embodiment 1, and air leak test method comprises the steps:
Steps A, airduct sealing step: the arm be connected on airduct is taken off, and the opening part sealing that arm position will be taken off, simultaneously all the other ports of sealing air pipe keep a SAO;
Step B, air-supply arrangement installation steps: get centrifugal blower 5 is arranged on airduct SAO place by orifice plate 9;
Step C, testing tool installation steps: at orifice plate 9, place is fit into air quantity differential manometer 8, at least one position in addition in airduct arranges static pressure differential manometer 11 in a pipe separately;
Step D, detecting step: start centrifugal blower 5 pairs of airduct inner blower, keep this parameter value when making air quantity differential manometer 8 display parameter value be X Pa, observe static pressure differential manometer in all pipes, if the parameter of static pressure differential manometer is consistent with the parameter that air quantity differential manometer 8 shows in all pipes, represent that whole airduct is without leakage, if in don't bother about individual, the parameter of static pressure differential manometer is less than the parameter that air quantity differential manometer 8 shows, then represent that airduct exists small opening.
After above-mentioned light leak method detection method completes, record and all leak out a little, to leaking out, some fluid sealant is repaired.After the repair has been completed, whether also small opening is there is in order to proofread accurately, the present invention spy adopts above-mentioned air leak test method, air leak test method utilizes the sealing of Pressure testing airduct, differential manometer test intake and air output is utilized whether to there is change, if there is change, represent also there is small opening, if intake is consistent with air output, then represent to there is not small opening.
In this specific description air leak test method, air leak test method is according to steps A, step B, step C carries out after assembling completes, start centrifugal blower 5, now centrifugal blower 5 is less than pumping in this detection system by the air in the external world, the air pressure in this detection system is made to reach X Pa, the data that air quantity differential manometer 8 shows are intake, i.e. centrifugal blower 5 air quantity that this detection system is sent into, in pipe, static pressure differential manometer detects the air pressure in airduct, if data are less than the data of air quantity differential manometer 8 in static pressure differential manometer in pipe, show necessarily also there is small opening, directly can judge whether this airduct also exists situation of leaking out by this detection method.Also as hydraulic pressure test method, iron mold can not be caused to airduct simultaneously.
Wherein, the design parameter value of Xpa should consider following key element:
(1) blower fan of air leakage amount testing device has enough blast, air quantity, the full test pressure that the blast of blower fan and air quantity should be greater than system under test (SUT) or pipeline section and the value that allows to leak out 1.2 times and more than.
(2) Xpa this be the numerical value that specification specifies, but this value is not ultimate value, can be below 700pa, as 300pa, 400pa, 500pa, 600pa etc., when just numerical value is lower, air leakage rate check is forbidden, and checks it can is all qualified.If numerical value is higher as 750pa, 800pa, 900pa etc. again, be also passable, but if the too high airduct that may cause of value is out of shape.
(3) in addition, airduct low-pressure system and medium voltage network generally do not need to carry out air leak test, and it is just passable directly to use up inspection.High-pressure system needs.But the present invention be directed to the tightness detection that low-pressure system arm carries out.
Embodiment 3
As shown in Figure 1, 2.
The present embodiment is on the basis of embodiment 1 or embodiment 2, when also there is small opening owing to illustrating when air leak test method, because air is colorless and odorless, the position of small opening can not be shown intuitively, now also need people to go to go to experience this small opening point with hand, because the area of airduct is large, need the position of impression more, therefore can not detect this small opening point preferably, therefore conveniently detect small opening intuitively, also comprise cigarette leak detection detection method, cigarette leak detection detection method comprises the steps:
Step a, airduct sealing step: the arm be connected on airduct is taken off, and the opening part sealing that arm position will be taken off, simultaneously all the other ports of sealing air pipe keep a SAO;
Step b, air-supply arrangement installation steps: get centrifugal blower 5 is arranged on airduct SAO place by orifice plate 9;
Step c, testing tool installation steps: at orifice plate 9, place is fit into air quantity differential manometer 8, at least one position in addition in airduct arranges static pressure differential manometer 11 in a pipe separately;
Steps d, smoke devices installation steps: in orifice plate 9 place or airduct or centrifugal blower 5 exit install smoke generating device 10;
Step e, detecting step: start smoke generating device, then centrifugal blower 5 pairs of airduct inner blower are started, keep this parameter value when making air quantity differential manometer 8 display parameter value be X Pa, observe static pressure differential manometer in all pipes, if the parameter of static pressure differential manometer is consistent with the parameter that air quantity differential manometer 8 shows in all pipes, represent that whole airduct is without leakage, if in don't bother about individual, the parameter of static pressure differential manometer is less than the parameter that air quantity differential manometer 8 shows, then represent that airduct exists small opening, when there is small opening, observe and find smog spillover position, this smog spillover position is small opening.
Wherein, the design parameter value of Xpa should consider following key element:
(1) blower fan of air leakage amount testing device has enough blast, air quantity, the full test pressure that the blast of blower fan and air quantity should be greater than system under test (SUT) or pipeline section and the value that allows to leak out 1.2 times and more than.
(2) Xpa this be the numerical value that specification specifies, but this value is not ultimate value, can be below 700pa, as 300pa, 400pa, 500pa, 600pa etc., when just numerical value is lower, air leakage rate check is forbidden, and checks it can is all qualified.If numerical value is higher as 750pa, 800pa, 900pa etc. again, be also passable, but if the too high airduct that may cause of value is out of shape.
(3) in addition, airduct low-pressure system and medium voltage network generally do not need to carry out air leak test, and it is just passable directly to use up inspection.High-pressure system needs.But the present invention be directed to the tightness detection that low-pressure system arm carries out.
See the following form, preferred Xpa value is 700pa.What wherein small opening number detected is maximum, and pipeline is without distortion.
The design parameter value of Xpa is on pipe detection impact table
| Xpa value | Small opening number | Pipe shape changes |
| 100Pa | 0 | Unchanged |
| 200Pa | 2 | Unchanged |
| 300Pa | 3 | Unchanged |
| 400Pa | 5 | Unchanged |
| 500Pa | 7 | Unchanged |
| 600Pa | 8 | Unchanged |
| 700Pa | 10 | Unchanged |
| 800Pa | 10 | Distortion |
| 900Pa | 10 | Distortion |
Cigarette leak detection detection method utilizes smog to the loss of small opening position under High Pressure, thus can observe this small opening easily, intuitively, convenient and reliable, also can not cause adverse consequences as hydraulic pressure test simultaneously.
Said method can repeatedly carry out repeatedly until there is not small opening phenomenon after all detecting.
The present invention utilizes various test, multiple technological means realizes comprehensive comprehensive test airduct, the sealing of critical guarantee airduct.The bad reaction (such as the generation of indentation, iron mold) of airduct can not be caused simultaneously.
Above-mentioned detection method can be carried out integrated testability and also can segmentation be tested.
Also there are air quantity controller installation steps, air quantity controller installation steps are: at centrifugal blower 5 and excessively between orifice plate 9, be orifice plate 9 direction be disposed with flow controller 6, honeycomb screen 7 from centrifugal blower 5.
Flow controller 6, honeycomb screen 7, for controlling entering of air quantity, prevent air quantity overvoltage or low pressure.
Embodiment 4
As shown in Figure 1.
Based on the light leak test macro of airduct tightness method of testing, comprise airduct 4, be provided with light source in airduct 4, light source comprises bulb 2, lampshade 1, electric wire 3, and lampshade parcel bulb, electric wire and bulb are connected, and electric wire is laid along airduct 4 path.
Embodiment 5
As shown in Figure 2.
Based on the Pressure testing system of airduct tightness method of testing, comprise the airduct 4 of maintenance all the other port sealings of SAO, SAO place is provided with centrifugal blower 5 by orifice plate 9, be provided with inlet air amount differential manometer 8 at orifice plate 9 place, at least one position in addition in airduct arranges static pressure differential manometer 11 in a pipe separately.
At centrifugal blower 5 and excessively between orifice plate 9, be orifice plate 9 direction from centrifugal blower 5 and be disposed with flow controller 6, honeycomb screen 7.
In orifice plate 9 place or airduct or centrifugal blower 5 exit install smoke generating device 10.Smoke generating device 10 distributes smog.
As above then the present invention can be realized preferably.
Claims (2)
1. airduct tightness method of testing, is characterized in that: comprise light leak method detection method; Described light leak method detection method comprises the steps:
Step 1, light source establishment step: adopt bulb (2), lampshade (1), electric wire (3) to set up light source, lampshade is wrapped up bulb, electric wire and bulb are connected;
Step 2, airduct inner light source establishment step: light source step 1 established is placed in airduct (4);
Step 3, detecting step: under dark surrounds, dragging electric wire (3) makes bulb (2) and lampshade (1) path all along airduct under the effect of electric wire (3) move on to, whether observe the airduct of light source through position has light to penetrate, if there is light to penetrate, represent that airduct has leakage, if dull thread injection represents that airduct does not leak;
Also comprise cigarette leak detection detection method, cigarette leak detection detection method comprises the steps:
Step a, airduct sealing step: the arm be connected on airduct is taken off, and the opening part sealing that arm position will be taken off, simultaneously all the other ports of sealing air pipe keep a SAO;
Step b, air-supply arrangement installation steps: get centrifugal blower (5) is arranged on airduct SAO place by orifice plate (9);
Step c, testing tool installation steps: be fit into air quantity differential manometer (8) at orifice plate (9) place, at least one position in addition in airduct arranges static pressure differential manometer (11) in a pipe separately;
Steps d, smoke devices installation steps: in orifice plate (9) place or airduct or centrifugal blower (5) exit install smoke generating device (10);
Step e, detecting step: start smoke generating device, then centrifugal blower (5) is started to airduct inner blower, keep this parameter value when making air quantity differential manometer (8) display parameter value be X Pa, observe static pressure differential manometer in all pipes, if the parameter of static pressure differential manometer is consistent with the parameter that air quantity differential manometer (8) shows in all pipes, represent that whole airduct is without leakage, if in don't bother about individual, the parameter of static pressure differential manometer is less than the parameter that air quantity differential manometer (8) shows, then represent that airduct exists small opening, when there is small opening, observe and find smog spillover position, this smog spillover position is small opening.
2. airduct tightness method of testing according to claim 1, it is characterized in that: also there are air quantity controller installation steps, air quantity controller installation steps are: at centrifugal blower (5) and excessively between orifice plate (9), be orifice plate (9) direction be disposed with flow controller (6), honeycomb screen (7) from centrifugal blower (5).
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