CN102539081B - Method for detecting sealability of multi-cavity container by using helium gas - Google Patents
Method for detecting sealability of multi-cavity container by using helium gas Download PDFInfo
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- CN102539081B CN102539081B CN201110421242.4A CN201110421242A CN102539081B CN 102539081 B CN102539081 B CN 102539081B CN 201110421242 A CN201110421242 A CN 201110421242A CN 102539081 B CN102539081 B CN 102539081B
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Abstract
The invention discloses a method for detecting sealability of a multi-cavity container by using helium gas. According to the method, a helium mass spectrum leakage detector, a vacuum slide valve pump, a roots pump, a high-vacuum baffle valve, a collecting tube, a sealing device, and first, second and third connecting pipelines which are arranged on the collecting tube are used; and the method comprises the following steps of: 1, detecting external leakage: making a lower end interface JB of each connecting pipeline be in hermetical clamping connection or hermetical threaded connection with an inlet of a corresponding cavity of the multi-cavity container to be detected in one-to-one correspondence respectively, opening the vacuum slide valve pump to perform vacuum pumping, hermetically wrapping a plate-fin heat exchanger by using the sealing device, charging the helium gas into the plate-fin heat exchanger, and connecting the helium mass spectrum leakage detector to the interface JA of each connecting pipeline in turn to perform detection; and 2, detecting internal leakage: charging the helium gas into a first cavity of the multi-cavity container, detecting the mutual leakage condition between the first cavity of the multi-cavity container and other cavities of the multi-cavity container, and reasoning by analogy. According to the method disclosed by the invention, the work process can be reduced, the work time can be shortened, and the working efficiency can be increased to achieve low-carbon environmental protection.
Description
Technical field
The present invention relates to the leak hunting method of pressure vessel, especially a kind of method with detecting sealability of multi-cavity container by using helium gas.
Background technology
Helium Leak Test is with its high sensitivity and accuracy and be conventionally applied on the pressure vessel that higher grade of anti-leak.Helium Leak Test substantially can be divided into and with helium interior pressurize and device interior, vacuumizes outside and apply these two kinds of helium.
Plate type finned heat exchanger is a kind of heat exchanger that is usually used in gas separation and low temperature field, and higher grade of leakproof, conventionally need to guarantee by Helium Leak Test the impermeability of heat interchanger.Because plate type finned heat exchanger is a kind of pressure vessel that can allow the heat exchange simultaneously of multiply medium, it usually has multiple passages (or claiming chamber), therefore needs respectively each passage to be hunted leak, and also referred to as inspection, leaks outside; In addition, except each passage may be in communication with the outside and leaks, also may occur leaking between adjacent two passages, conventionally be referred to as interior leakage.
In NB/T 47006-2009, describe plate type finned heat exchanger in detail and carry out that helium mass spectrum leaks outside and the detection method of interior leakage.Leak outside while detecting, first tested passage is connected with helium mass analyzer, then by plate-fin heat exchanger plastic bag sealing, between polybag and plate type finned heat exchanger, be full of helium or helium and nitrogen mixture, then tested passage is carried out to helium mass spectrum leak detection.After detection, change a passage and repeat aforesaid operations, carry out the detection of next passage.While carrying out interior undetected survey, first tested passage is connected with helium mass analyzer, then at adjacency channel, passes into helium or helium and nitrogen mixture, carry out interior undetected survey.After detection, replacing passage repeats the interior undetected survey of other adjacency channels.
Because plate-fin heat exchanger has multiple passages conventionally, therefore when carrying out helium inspection, need to repeatedly repeat to connect detector and heat interchanger.Especially some complicated plate-fin heat exchanger, has ten a plurality of fluids sometimes, does that helium inspection leaks outside and during interior leakage, need carry out repeated dismounting connection like this at heat exchanger, works very loaded down with trivial details, and time-consuming very long, repeated priming vacuum unit, repeats to fill helium.
Summary of the invention
The object of the invention is to: a kind of method that detects multi cavity container or multiple container tightness with helium is provided, can reduces working routine, shorten working hours, increase work efficiency, low-carbon environment-friendly, especially, when multi cavity container has compared with hyperchannel, effect is particularly evident.
For achieving the above object, the present invention can take following technical proposals:
A kind of method with detecting sealability of multi-cavity container by using helium gas of the present invention, comprise helium mass spectrometer leak detector, connected vacuum slide valve pump in turn, lobe pump, cap of high-vacuum baffle valve and concetrated pipe, and for sealing multi cavity container to be measured or multiple container and can charging and discharging the packoff of helium, on described concetrated pipe, be at least provided with from left to right the first connecting line, the second connecting line, the 3rd three of connecting lines connecting line, each described connecting line is provided with the valve FA for closing and open this connecting line, on connecting line below this valve FA, be provided with the interface JA removably connecting with described helium mass spectrometer leak detector, on this interface JA, be provided with the valve FB for closing and open this interface JA, the lower end of each described connecting line is provided with the interface JB removably connecting with multi cavity container entrance to be measured, the method that helium detects sealing comprises the following steps:
Step 1: detection leaks outside
By the lower end interface JB of each connecting line respectively the corresponding chambers close with multi cavity container to be measured entrance one by one corresponding sealing clamping or sealing be spirally connected,
The valve FA of each connecting line is opened, the valve FB of each connecting line is closed, open vacuum slide valve pump, lobe pump, vacuumize, after vacuumizing, close each valve FA, plate-fin heat exchanger sealing encased with packoff, and in packoff filling helium, then, helium mass spectrometer leak detector is met successively to the interface JA of each connecting line, during connection, open corresponding valve FB, detect leaking outside of each chamber;
Step 2: carry out interior undetected survey
The valve FA of each connecting line is closed, helium is charged in the first close chamber of multi cavity container by the valve FB of the first connecting line, helium mass spectrometer leak detector meets the interface JA of the second connecting line, the interface JA of the 3rd connecting line successively, during connection, open corresponding valve FB, detect close the first chamber of multi cavity container respectively and the second chamber, the 3rd chamber that multi cavity container is close between mutual leakage situation;
Helium is charged in the second close chamber of multi cavity container by the valve FB of the second connecting line, helium mass spectrometer leak detector meets the interface JA of the 3rd connecting line, open valve FB during connection, detects the mutual leakage situation between the 3rd close chamber of the second close chamber of multi cavity container and multi cavity container.
Between described lobe pump and cap of high-vacuum baffle valve, be connected with transition section, between described cap of high-vacuum baffle valve and concetrated pipe, be connected with corrugated tube; Described packoff comprises an air bag, described air bag is connected with helium tank with valve FD by valve FC, compressor successively, helium in the close chamber of helium in packoff and multi cavity container, by valve FC, compressor and valve FD, be connected with helium tank, composition helium recovery system, to realize the repeatedly use of helium; In use, suitably add the requirement that high-purity helium keeps test concentrations.
Compared with prior art the invention has the beneficial effects as follows: owing to adopting said method, when detecting multi cavity container to be measured or multiple container, can be by helium mass spectrometer leak detector connection and the valve FA respectively at the interface JA of each connecting line, the opening and closing of valve FB, complete the detection of leaking and leaking outside in multi cavity container to be measured, or the detection to multiple containers simultaneously, do not need to carry out repeated dismounting connection, do not need to repeat to close and start vacuum unit, do not need to repeat to charge and discharge helium, can reduce working routine, shorten working hours, increase work efficiency, low-carbon environment-friendly, especially when multi cavity container has compared with hyperchannel, effect is particularly evident.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, the present invention is a kind of device that carrys out the sealing of check-out console fin heat exchanger 19 with helium, this plate type finned heat exchanger 19 has five chambers, the present invention includes helium mass spectrometer leak detector 1, connected vacuum slide valve pump 2 in turn, lobe pump 3, cap of high-vacuum baffle valve 4 and concetrated pipe 5, between described lobe pump 3 and cap of high-vacuum baffle valve 4, be connected with transition section 11, between described cap of high-vacuum baffle valve 4 and concetrated pipe 5, be connected with corrugated tube 12, and for sealing multi cavity container to be measured or multiple container and can charging and discharging the packoff of helium, described packoff comprises an air bag 13, described air bag 13 is successively by valve FC14, compressor 15 is connected with helium tank 17 with valve FD16, on described concetrated pipe 5, be provided with five connecting lines 6, each described connecting line 6 is provided with one for closing and open the valve FA7 of this connecting line 6, on connecting line 6 below this valve FA7, be provided with an interface JA8 who removably connects with described helium mass spectrometer leak detector 1, on this interface JA8, be provided with one for closing and open the valve FB9 of this interface JA8, the lower end interface JB10 of five described connecting lines 6 respectively with the entrance corresponding sealing clamping one by one (or sealing is spirally connected) of five chambers of board under test fin heat exchanger 19.
As shown in Figure 1, a kind of leak hunting method that detects described plate type finned heat exchanger sealing with said apparatus:
Step 1: detection leaks outside
For sake of convenience, we by five connecting lines 6 be called respectively from left to right the first connecting line 6, the second connecting line 6 ..., the 5th connecting line 6.By the lower end interface JB10 of five connecting lines 6 respectively with the entrance corresponding sealing clamping one by one (or sealing is spirally connected) of five chambers of board under test fin heat exchanger 19,
The valve FA7 of five connecting lines 6 is opened, the valve FB9 of five connecting lines 6 is closed, open vacuum slide valve pump 2, lobe pump 3, vacuumize, after vacuumizing, close five valve FA7, plate-fin heat exchanger 19 sealing is encased with air bag 13, and at the interior filling helium of air bag 13, then, by helium mass spectrometer leak detector 1 connect successively the first connecting line 6, the second connecting line 6 ..., the 5th connecting line 6 interface JA8, during connection, open corresponding valve FB9, detect leaking outside of each passage;
Step 2: carry out interior undetected survey
The valve FA7 of five connecting lines 6 is closed, helium is charged to by the valve FB9 of the first connecting line 6 in first chamber (or claiming passage) of plate-fin heat exchanger 19, helium mass spectrometer leak detector 1 connect successively the second connecting line 6 ..., the 5th connecting line 6 interface JA8, during connection, open corresponding valve FB9, the mutual leakage situation of the first chamber of detection plate-fin heat exchanger 19 respectively and between the second chamber of plate-fin heat exchanger 19, the 3rd chamber, the 4th chamber and the 5th chamber;
Helium is charged to by the valve FB9 of the second connecting line 6 in the second chamber of plate-fin heat exchanger 19, helium mass spectrometer leak detector 1 meets the interface JA8 of the 3rd connecting line 6, the 4th connecting line 6, the 5th connecting line 6 successively, during connection, open corresponding valve FB9, the mutual leakage situation of the second chamber of detection plate-fin heat exchanger 19 respectively and between the 3rd chamber of plate-fin heat exchanger 19, the 4th chamber and the 5th chamber;
Helium is charged to by the valve FB9 of the 3rd connecting line 6 in the 3rd chamber of plate-fin heat exchanger 19, helium mass spectrometer leak detector 1 meets the interface JA8 of the 4th connecting line 6, the 5th connecting line 6 successively, during connection, open corresponding valve FB9, the mutual leakage situation of the 3rd chamber of detection plate-fin heat exchanger 19 respectively and between the 4th chamber, the 5th chamber of plate-fin heat exchanger 19;
Helium is charged to by the valve FB9 of the 4th connecting line 6 in the 4th chamber of plate-fin heat exchanger 19, helium mass spectrometer leak detector 1 meets the interface JA8 of the 5th connecting line 6, open the valve FB9 of the 5th connecting line 6, detect the leakage situation between the 4th chamber of plate-fin heat exchanger 19 and the 5th chamber of plate-fin heat exchanger 19;
Adopt the present invention to detect, do not need the repeated dismounting of carrying out between connecting line 6 and multi cavity container to be measured or multiple container to be connected, do not need to repeat to close and start vacuum slide valve pump 2, do not need to repeat to charge and discharge helium, can reduce working routine, shorten working hours, increase work efficiency, low-carbon environment-friendly, especially, when multi cavity container has compared with hyperchannel, effect is particularly evident;
Step 3: helium recovery
Helium is referred to as gold gas conventionally, be worth higher, the helium in the helium in air bag 13 and plate-fin heat exchanger 19 chambers, by valve FC14, compressor 15 and valve FD16, be connected with helium tank 17, composition helium recovery system, to realize the repeatedly use of helium, low-carbon environment-friendly; In use, suitably add the requirement that high-purity helium keeps test concentrations.
Claims (2)
1. the method with detecting sealability of multi-cavity container by using helium gas, comprise helium mass spectrometer leak detector (1), connected vacuum slide valve pump (2) in turn, lobe pump (3), cap of high-vacuum baffle valve (4) and concetrated pipe (5), and for sealing multi cavity container to be measured or multiple container and can charging and discharging the packoff of helium, on described concetrated pipe (5), be at least provided with from left to right the first connecting line (6), the second connecting line (6), the 3rd (6) three connecting lines of connecting line (6), each described connecting line (6) is provided with the valve FA(7 for closing and open this connecting line (6)), at this valve FA(7) below connecting line (6) on be provided with the interface JA(8 removably connecting with described helium mass spectrometer leak detector (1)), at this interface JA(8) on be provided with for closing and open this interface JA(8) valve FB(9), the lower end of each described connecting line (6) is provided with the interface JB(10 removably connecting with multi cavity container to be measured (19) entrance), it is characterized in that comprising the following steps:
Step 1: detection leaks outside
By the lower end interface JB(10 of each connecting line (6)) respectively with the entrance of the corresponding chambers of multi cavity container to be measured (19) one by one corresponding sealing clamping or sealing be spirally connected,
By the valve FA(7 of each connecting line (6)) all open, by the valve FB(9 of each connecting line (6)) all close, open vacuum slide valve pump (2), lobe pump (3), vacuumize, after vacuumizing, close each valve FA(7), multi cavity container to be measured (19) sealing is encased with packoff, and in packoff filling helium, then, helium mass spectrometer leak detector (1) is met successively to the interface JA(8 of each connecting line (6)), during connection, open corresponding valve FB(9), detect leaking outside of each chamber;
Step 2: carry out interior undetected survey
By the valve FA(7 of each connecting line (6)) all close, by helium by the valve FB(9 of the first connecting line (6)) be charged in the first chamber of multi cavity container to be measured (19), helium mass spectrometer leak detector (1) meets the interface JA(8 of the second connecting line (6) successively), the interface JA(8 of the 3rd connecting line (6)), during connection, open corresponding valve FB(9), the mutual leakage situation of the first chamber that detects multi cavity container to be measured (19) respectively and between the second chamber of multi cavity container to be measured (19), the 3rd chamber;
By helium by the valve FB(9 of the second connecting line (6)) be charged in the second chamber of multi cavity container to be measured (19), helium mass spectrometer leak detector (1) meets the interface JA(8 of the 3rd connecting line (6)), open valve FB(9 during connection), detect the mutual leakage situation between the second chamber of multi cavity container to be measured (19) and the 3rd chamber of multi cavity container to be measured (19).
2. the method with detecting sealability of multi-cavity container by using helium gas according to claim 1, it is characterized in that: between described lobe pump (3) and cap of high-vacuum baffle valve (4), be connected with transition section (11), between described cap of high-vacuum baffle valve (4) and concetrated pipe (5), be connected with corrugated tube (12); Described packoff comprises an air bag (13), described air bag (13) is successively by valve FC(14), compressor (15) and valve FD(16) be connected with helium tank (17), helium in helium in packoff and multi cavity container to be measured (19) chamber, by valve FC(14), compressor (15) and valve FD(16) be connected with helium tank (17), composition helium recovery system, to realize the repeatedly use of helium; In use, suitably add the requirement that high-purity helium keeps test concentrations.
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| CN201110421242.4A CN102539081B (en) | 2011-12-16 | 2011-12-16 | Method for detecting sealability of multi-cavity container by using helium gas |
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| CN201110421242.4A CN102539081B (en) | 2011-12-16 | 2011-12-16 | Method for detecting sealability of multi-cavity container by using helium gas |
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| CN102539081B true CN102539081B (en) | 2014-05-07 |
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