CN204679222U - A kind of gas concentration sniffer - Google Patents
A kind of gas concentration sniffer Download PDFInfo
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- CN204679222U CN204679222U CN201520107715.7U CN201520107715U CN204679222U CN 204679222 U CN204679222 U CN 204679222U CN 201520107715 U CN201520107715 U CN 201520107715U CN 204679222 U CN204679222 U CN 204679222U
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Abstract
The utility model discloses a kind of gas concentration sniffer.It includes provides confined space for placing the detection case of workpiece to be checked; Described detection case is outside equipped with the tracer gas valve and tracer gas source of the gas that are connected with inside workpiece to be checked; Described detection case peripheral hardware has vacuum-pumping valve for vacuumizing its confined space and vacuum pump; Some gas suction nozzles are provided with in the confined space of described detection case outside workpiece to be checked, described gas suction nozzle is connected with the gas sensor valve be arranged on outside detection case, gas suction pump and gas sensor by pipeline, each gas suction nozzle described is marked with Position Number, and described gas sensor is provided with the detection corresponding with the Position Number of gas suction nozzle numbers.The utility model adopts technique scheme, and it both can realize low cost and detect gas concentration, Leakage Gas rapidly, also realizes automatically detecting and without the need to manual intervention simultaneously, but also roughly can locate leakage point.
Description
Technical field
The utility model relates to a kind of gas detection technology, is specifically related to a kind of gas concentration sniffer.
Background technology
Gas concentration (comprising gas leak detection) Detection Techniques range of application is comparatively wide, and wherein vacuum box type gas leakage detecting technology and large air-aspiration gun formula leak hunting technology are conventional two kinds, carry out air-leakage test by the detection of trace gas concentration to product.
Vacuum box type and large air-aspiration gun formula gas leak detection technology are generally with halogen gas, the gas such as hydrogen or helium is as tracer gas, as shown in Figure 1, vacuum box type gas leakage detecting device comprises detection case 1, vacuum-pumping valve 4, vacuum pump 5, gas sensor valve 6, gas sensor 7, tracer gas valve 2 and tracer gas source of the gas 3, during detection, first open vacuum-pumping valve 4, with vacuum pump 5, detection case 1 is evacuated to high vacuum, then tracer gas valve 2 and tracer gas source of the gas 3 is opened, tracer gas is filled with workpiece 10 to be checked inner, finally open gas sensor valve 6, the concentration of the outside tracer gas of workpiece 10 to be checked is detected with gas sensor 7, if the tracer gas signal detected exceedes gas sensor 7 setting value, show that workpiece to be checked has leakage.
The feature of vacuum box type gas leakage detecting technology is that workpiece to be checked is placed in detection case 1, before trace gas leak detection is filled to workpiece, first open vacuum-pumping valve 4, with vacuum pump 5, detection case is evacuated to high vacuum, very high to the requirement of vacuum tightness, the accuracy not so detected easily is affected.Due to high vacuum, tracer gas rate of propagation is fast, and gas sensor 7 does not need to carry out assisted inhalation can detect tracer gas fast at the diffusion motion of vacuum environment concentration by tracer gas.Vacuum box type gas leakage detecting system accuracy of detection is high, and productive temp is fast, can realize fully-automated synthesis, not need manual intervention.But device structure is very complicated and strict, device fabrication cost is high, because need high vacuum, Vacuum System Design is complicated, manufacturing cost is also high, the equipment investment of high cost limits promoting the use of of vacuum box type leak hunting technology, and this technology can not position by the leakage point concrete to workpiece to be checked simultaneously.
As shown in Figure 2, large air-aspiration gun formula gas leakage hunting apparatus comprises tracer gas valve 2, tracer gas source of the gas 3, suction gun 12 and gas sensor 7, be characterized in the suspected location adopting artificial hand-held suction gun 12 testing product under atmospheric environment, be confirmed whether to exist and leak, and can position leakage point, concrete leak position can be detected.Owing to operating under atmospheric environment, this method requires the distance < 3mm of suction gun 12 and check point, and the suction gun residence time of each check point is 3 seconds, translational speed < 20mm/sec.Large air-aspiration gun formula gas leakage hunting apparatus equipment cost is lower, only need be equipped with gas concentration sensor and suction gun, but this detection method relies on the experience of operator, and accuracy of detection is low, can not ensure work quality, and efficiency is very low.
Utility model content
The purpose of this utility model is for the problems referred to above weak point, a kind of new gas concentration sniffer is provided, it both can realize low cost and detect gas concentration, Leakage Gas rapidly, also realize automatically detecting and without the need to manual intervention simultaneously, but also roughly can locate leakage point.
In order to achieve the above object, the utility model is by the following technical solutions:
A device for gas concentration detection, it includes provides confined space for placing the detection case of workpiece to be checked; Described detection case is outside equipped with the tracer gas valve and tracer gas source of the gas that are connected with inside workpiece to be checked; Described detection case peripheral hardware has vacuum-pumping valve for vacuumizing its confined space and vacuum pump; Some gas suction nozzles are provided with in the confined space of described detection case outside workpiece to be checked, described gas suction nozzle is connected with the gas sensor valve be arranged on outside detection case, gas suction pump and gas sensor by pipeline, each gas suction nozzle described is marked with Position Number, and described gas sensor is provided with the detection corresponding with the Position Number of gas suction nozzle numbers.
Further, the distance of described gas suction nozzle and workpiece to be checked is between 6mm-200mm; The easy leak that described gas suction nozzle is arranged on workpiece to be checked is outside.
Concrete further, each gas suction nozzle connects separately one group of gas sensor valve, gas suction pump and gas sensor; Or unification is connected with a gas sensor after each gas suction nozzle described connects separately one group of gas sensor valve and gas suction pump.
As preferably, device described in the utility model also comprises a Programmable Logic Controller, and it is electrically connected with tracer gas valve, vacuum-pumping valve, vacuum pump, gas suction pump, gas sensor valve and gas sensor respectively.
The utility model adopts technique scheme, and it both can realize low cost and detect gas concentration, Leakage Gas rapidly, also realizes automatically detecting and without the need to manual intervention simultaneously, but also roughly can locate leakage point.
Accompanying drawing explanation
Fig. 1 is that existing vacuum box type gas leakage detecting device simplifies structural representation.
Fig. 2 is that existing large air-aspiration gun formula gas leakage hunting apparatus simplifies structural representation.
Fig. 3 is that embodiment 1 gas concentration sniffer described in the utility model simplifies structural representation.
Fig. 4 is the electrical principle simplified block diagram of embodiment 1 gas concentration sniffer described in the utility model.
Fig. 5 is that embodiment 2 gas concentration sniffer described in the utility model simplifies structural representation.
Fig. 6 is the electrical principle simplified block diagram of embodiment 2 gas concentration sniffer described in the utility model.
Below by way of accompanying drawing and embody rule mode, the utility model is further described:
Embodiment
Embodiment 1
As shown in Figures 3 and 4, a kind of gas concentration sniffer described in the utility model, the principle that the speed utilizing a kind of gas to spread in another kind of gas follows the pressure of ambient gas to be inversely proportional to, namely tracer gas rate of propagation feature faster is in a low voltage state utilized, take the scientific and reasonable combination of advantage of vacuum box type gas leakage detecting technology and large both air-aspiration gun formula leak hunting technologies, it both can realize low cost and rapidly to gas concentration, Leakage Gas detects, also realize automatically detecting and without the need to manual intervention simultaneously, but also roughly can locate leakage point.
Gas concentration sniffer described in the utility model includes provides confined space for placing the detection case 1 of workpiece to be checked; Described detection case 1 is outside equipped with the tracer gas valve 2 and tracer gas source of the gas 3 that are connected with inside workpiece to be checked; Described detection case 1 peripheral hardware has vacuum-pumping valve 4 for vacuumizing its confined space and vacuum pump 5; Some gas suction nozzles 8 are provided with in the confined space of described detection case 1 outside workpiece to be checked, described gas suction nozzle 8 is connected with the gas sensor valve 6 be arranged on outside detection case 1, gas suction pump 9 and gas sensor 7 by pipeline, on each gas suction nozzle described, 8 are marked with Position Number, and described gas sensor 7 is provided with the detection corresponding with the Position Number of gas suction nozzle 8 numbers.
Further, the distance of described gas suction nozzle 8 and workpiece to be checked 10 is between 6mm-200mm; The easy leak that described gas suction nozzle 8 is arranged on workpiece 10 to be checked is outside, like this can the concrete leakage point of quick lock in, improves leak detection efficiency.
Particularly, each gas suction nozzle 8 connects one group of gas sensor valve 6, gas suction pump 9 and gas sensor 7 separately.
Control to realize intelligent automation, device described in the utility model also comprises a Programmable Logic Controller 11, and it is electrically connected with tracer gas valve 2, vacuum-pumping valve 4, vacuum pump 5, gas suction pump 9, gas sensor valve 6 and gas sensor 7 respectively.As shown in Figures 3 and 4, the present embodiment comprises three groups of gas mouths 8, i.e. the first gas suction nozzle 81, second gas suction nozzle 82 and the 3rd gas suction nozzle 83, described first gas suction nozzle 81 is by pipeline and the first gas sensor valve 61, first gas suction pump 91 and the first gas sensor 71 connect, described second gas suction nozzle 82 is by pipeline and the second gas sensor valve 6, second gas suction pump 922 and the second gas sensor 72 connect, described 3rd gas suction nozzle 83 is by pipeline and the 3rd gas sensor valve 63, 3rd gas suction pump 93 and the 3rd gas sensor 73 connect.Programmable Logic Controller 11 can carry out mark correspondence to above-mentioned often group gas suction pump 9, gas sensor valve 6 and gas sensor 7 respectively and often organize gas suction nozzle 8, thus can determine the leakage point near gas suction nozzle 8 corresponding with it by corresponding gas sensor leakage alarm.
Below by way of embody rule, the utility model is further described:
First workpiece to be checked is placed in detection case 1; Controlled by Programmable Logic Controller, open vacuum-pumping valve 4, vacuumized by vacuum pump 5 pairs of confined spaces, vacuum pressure is between 100Pa-90000Pa; Then open tracer gas valve 2, by tracer gas source of the gas 3, tracer gas is filled with to workpiece 10 inside to be checked; Open gas sensor valve 6 and gas suction pump 9, be delivered to gas sensor 7 by gas suction nozzle 8 gas sucked near workpiece 10 to be checked and detect.When gas sensor 7 detects that the trace gas concentration of a certain gas suction nozzle 8 reaches default leakage value, Programmable Logic Controller can determine the leak position of workpiece 10 to be checked according to the Position Number of this gas suction nozzle.
Gas concentration sniffer described in the utility model, the principle that the speed utilizing a kind of gas to spread in another kind of gas follows the pressure of ambient gas to be inversely proportional to, namely tracer gas rate of propagation feature faster is in a low voltage state utilized, certain vacuum tightness (lower than the vacuum level requirements of existing vacuum box type gas leakage detecting technology) is evacuated to confined space, then the gas suction nozzle near workpiece to be checked is utilized to carry out active inspiration conveying gas sensor (because utilize the close suction technology of large air-aspiration gun formula leak hunting technology, the transport of tracer gas can be accelerated, therefore lower to vacuum level requirements relative vacuum box gas leak detection technology, thus material and the manufacturing cost of equipment can be saved), if workpiece to be checked has leakage, the gas signal leaked can be collected by gas suction nozzle and lean out by gas sensor, separately because Programmable Logic Controller can to often organizing gas suction pump, gas sensor valve and gas sensor identify, thus gas suction nozzle corresponding with it can be determined, realization more accurately can determine the position of leakage point.Due to relatively low to the vacuum level requirements of detection case, simplify the design of vacuum system, reduce manufacturing cost.
Embodiment 2
As illustrated in Figures 5 and 6, it is different that the present embodiment and the difference of embodiment 2 are that gas sensor is arranged continuously, other structures are all identical with embodiment 2, are specially: after each gas suction nozzle 8 described connects one group of gas suction pump 9 and gas sensor valve 6 separately, unification is connected with a gas sensor 7.The present embodiment comprises three groups of gas mouths 8, i.e. the first gas suction nozzle 81, second gas suction nozzle 82 and the 3rd gas suction nozzle 83, described first gas suction nozzle 81 is by pipeline and the first gas sensor valve 61, first gas suction pump 91 and gas sensor 7 connect, described second gas suction nozzle 82 is by pipeline and the second gas sensor valve 62, second gas suction pump 92 and gas sensor 7 connect, described 3rd gas suction nozzle 83 is by pipeline and the 3rd gas sensor valve 63, 3rd gas suction pump 93 and gas sensor 7 connect, above-mentioned gas sensor 7 is an assembly type gas sensor, it can arrange the sense channel of corresponding gas suction nozzle 8 quantity, by Programmable Logic Controller 11, detection numbering mark is carried out to each sense channel, thus gas suction nozzle 8 corresponding with it can be marked, and then the location realized concrete leakage point.
Other structures of the present embodiment as described in Example 1.
Claims (5)
1. a gas concentration sniffer, is characterized in that: include and provide confined space for placing the detection case of workpiece to be checked; Described detection case is outside equipped with the tracer gas valve and tracer gas source of the gas that are connected with inside workpiece to be checked; Described detection case peripheral hardware has vacuum-pumping valve for vacuumizing its confined space and vacuum pump; Some gas suction nozzles are provided with in the confined space of described detection case outside workpiece to be checked, described gas suction nozzle is connected with the gas sensor valve be arranged on outside detection case, gas suction pump and gas sensor by pipeline, each gas suction nozzle described is marked with Position Number, and described gas sensor is provided with the detection corresponding with the Position Number of gas suction nozzle numbers.
2. a kind of gas concentration sniffer according to claim 1, is characterized in that: the distance of described gas suction nozzle and workpiece to be checked is between 6mm-200mm.
3. a kind of gas concentration sniffer according to claim 1, is characterized in that: the easy leak that described gas suction nozzle is arranged on workpiece to be checked is outside.
4. a kind of gas concentration sniffer according to claim 1, is characterized in that: each gas suction nozzle connects separately one group of gas sensor valve, gas suction pump and gas sensor; Or unification is connected with a gas sensor after each gas suction nozzle described connects separately one group of gas sensor valve and gas suction pump.
5. a kind of gas concentration sniffer according to claim 1, it is characterized in that: also comprise a Programmable Logic Controller, it is electrically connected with tracer gas valve, vacuum-pumping valve, vacuum pump, gas suction pump, gas sensor valve and gas sensor respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520107715.7U CN204679222U (en) | 2015-02-12 | 2015-02-12 | A kind of gas concentration sniffer |
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| CN201520107715.7U CN204679222U (en) | 2015-02-12 | 2015-02-12 | A kind of gas concentration sniffer |
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| CN204679222U true CN204679222U (en) | 2015-09-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987796A (en) * | 2015-02-12 | 2016-10-05 | 广州市和晋自动化控制技术有限公司 | Method and device for detecting gas concentration |
| CN107655635A (en) * | 2017-09-20 | 2018-02-02 | 牛皓同 | A kind of waterproof detection method and waterproof reliability checking method |
| CN113624412A (en) * | 2021-06-24 | 2021-11-09 | 上海江南长兴造船有限责任公司 | Combustible gas leakage identification system of marine generator and ship |
| CN114018497A (en) * | 2016-06-30 | 2022-02-08 | 株式会社开滋 | Valve pressure resistance inspection device, inspection method thereof, and hydrogen gas detection unit |
-
2015
- 2015-02-12 CN CN201520107715.7U patent/CN204679222U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987796A (en) * | 2015-02-12 | 2016-10-05 | 广州市和晋自动化控制技术有限公司 | Method and device for detecting gas concentration |
| CN114018497A (en) * | 2016-06-30 | 2022-02-08 | 株式会社开滋 | Valve pressure resistance inspection device, inspection method thereof, and hydrogen gas detection unit |
| CN114018497B (en) * | 2016-06-30 | 2024-03-26 | 株式会社开滋 | Pressure-resistant inspection device for valve, inspection method thereof, and hydrogen gas detection unit |
| CN107655635A (en) * | 2017-09-20 | 2018-02-02 | 牛皓同 | A kind of waterproof detection method and waterproof reliability checking method |
| CN113624412A (en) * | 2021-06-24 | 2021-11-09 | 上海江南长兴造船有限责任公司 | Combustible gas leakage identification system of marine generator and ship |
| CN113624412B (en) * | 2021-06-24 | 2024-05-17 | 上海江南长兴造船有限责任公司 | Marine generator combustible gas leakage identification system and ship |
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