Suction type double-gas analysis leak detector

Abstract

The utility model discloses a suction type double-gas analysis leak detector which comprises a first gas analysis chamber and a second gas analysis chamber which are independently arranged, the gas outlet end of the first gas analysis chamber and the gas outlet end of the second gas analysis chamber are connected with a vacuum pump, a first gas conveying pipe is connected to a first gas inlet of the first gas analysis chamber, and a second gas conveying pipe is connected to a second gas inlet of the second gas analysis chamber. A gas inlet II of the gas analysis chamber II is connected with a gas conveying pipe II, and a gas suction nozzle II and a gas suction nozzle I are respectively arranged on the gas conveying pipe II and the gas conveying pipe I in a front-back manner. When the concentrations of the gases sucked by the second suction nozzle and the first suction nozzle are consistent or basically close, the alarm signal is not sent out, and when the concentration of the gases sucked by the second suction nozzle at the front end is larger than that of the gases sucked by the first suction nozzle, the alarm signal of detecting a leakage point is sent out, namely, the gas leakage point exists near the second suction nozzle. And therefore, the position of the leakage point can be locked quickly, accurately and efficiently, and the leakage detection efficiency of the equipment can be greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of gas leak detection technology, and in particular to an inhalation-type dual-gas analyzer leak detector. Background Technology

[0002] Refrigerant leak detectors are mainly used to detect leaks in the operating pipelines and connections of refrigeration and heat exchange equipment. Specifically, the detector's suction nozzle is moved to the area to be tested, and the sucked-in gas is delivered to the gas analysis chamber. By setting up detection light sources and detectors at both ends of the gas analysis chamber, the incoming gas is subjected to spectral analysis to determine whether there is a gas leak, i.e., to detect refrigerant leaks in the equipment.

[0003] Most leak detectors on the market today are single-gas analysis chamber type, meaning that after the leak detector draws in refrigerant gas, it issues a leak alarm through spectral analysis to achieve the purpose of leak detection.

[0004] However, the above detection method has certain limitations. When multiple test points are concentrated, if a leak occurs at one of the test points, the leaked gas will spread to the vicinity of the test area. As a result, when the suction nozzle of the leak detector approaches the leak area but does not actually touch the leak point, the leak detector will sound an alarm. Thus, it can only determine that there is a leak in the area, but cannot accurately pinpoint the specific location of the leak. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an inhalation-type dual-gas analysis leak detector.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dual-gas analysis leak detector for inhalation includes two independently configured gas analysis chambers: a first gas analysis chamber and a second gas analysis chamber. Vacuum pumps are connected to the outlets of the first and second gas analysis chambers. A gas supply pipe is connected to the inlet of the first gas analysis chamber, and a gas supply pipe is connected to the inlet of the second gas analysis chamber. A suction nozzle is provided at the front and rear of the second and first gas supply pipes, respectively.

[0008] Preferably, the air supply pipe is provided with a filter located between the air inlet and the air outlet.

[0009] Preferably, the second air supply pipe is provided with a second filter located between the second air inlet and the second air outlet.

[0010] Preferably, an exhaust pipe is connected to the gas outlet of the first gas analysis chamber, and an exhaust pipe is connected to the gas outlet of the second gas analysis chamber. The other ends of the exhaust pipes are connected to a vacuum pump.

[0011] Preferably, a buffer gas tank is provided between the first exhaust pipe, the second exhaust pipe, and the vacuum pump.

[0012] Preferably, filter 1 is provided at both ends of gas analysis chamber 1, and filter 2 is provided at both ends of gas analysis chamber 2.

[0013] The beneficial effects of this utility model are:

[0014] 1. The system performs two independent detections on the gas drawn in by the front and rear suction nozzles 2 and 1. When the gas concentrations drawn in by suction nozzles 2 and 1 are the same or close, no alarm signal is issued. However, when the gas concentration drawn in by suction nozzle 2 is greater than that drawn in by suction nozzle 1, an alarm signal is issued indicating that a gas leak has been detected near suction nozzle 2. This allows for quick, accurate, and efficient location of leaks, significantly improving the equipment's leak detection efficiency and meeting the needs of fast-paced production lines such as assembly lines.

[0015] 2. By setting up two sets of independent suction nozzle 1 and gas analysis chamber 1 and suction nozzle 2 and gas analysis chamber 2, two gas streams can be detected and analyzed simultaneously, thereby enabling more efficient detection of gas leaks and pinpointing leak points, further improving detection efficiency. Moreover, the two sets of detection are independent of each other and will not cause detection interference, making the detection results more accurate and reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: Gas supply pipe 1, suction nozzle 11, filter 12, exhaust pipe 13, gas analysis chamber 2, air inlet 21, air outlet 22, optical filter 23, detection light source 3, detector 4, vacuum pump 5, buffer gas tank 51, gas supply pipe 2 6, suction nozzle 2 61, filter 2 62, exhaust pipe 2 63, gas analysis chamber 2 7, air inlet 2 71, air outlet 2 72, optical filter 2 73, ambient gas area 8, leaked gas area 9. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] In the description of this specification, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figure 1 As shown, this embodiment discloses an inhalation-type dual-gas analysis leak detector, including independently set gas analysis chamber 1 2 and gas analysis chamber 2 7. The gas analysis chamber 1 2 and gas analysis chamber 2 7 are connected to a vacuum pump 5. Specifically, an exhaust pipe 13 is connected to the gas outlet 1 22 of gas analysis chamber 1 2, and an exhaust pipe 2 63 is connected to the gas outlet 2 72 of gas analysis chamber 2 7. The other ends of exhaust pipe 1 13 and exhaust pipe 2 63 are connected in parallel to the vacuum pump 5, and a buffer gas tank 51 is provided between exhaust pipe 1 13, exhaust pipe 2 63 and vacuum pump 5.

[0021] Gas analysis chamber 2 is connected to gas inlet 21 by gas supply pipe 1, and gas analysis chamber 7 is connected to gas inlet 71 by gas supply pipe 6. Gas supply pipe 6 and gas supply pipe 1 are respectively provided with suction nozzle 61 and suction nozzle 11, that is, one end of gas supply pipe 1 is connected to gas inlet 21, and the other end of gas supply pipe 1 is connected to suction nozzle 11. Gas supply pipe 1 is provided with filter 12 located between suction nozzle 11 and gas inlet 21.

[0022] Furthermore, one end of the second air supply pipe 6 is connected to the second air inlet 71, and the other end of the second air supply pipe 6 is connected to the second air inlet 61. A second filter 62 is provided on the second air supply pipe 6 between the second air inlet 61 and the second air inlet 71.

[0023] The second suction nozzle 61 and the first suction nozzle 11 are staggered. The second suction nozzle 61 and the first suction nozzle 11 are drawn in by the vacuum pump 5 to respectively send the gas from the corresponding location to the second gas analysis chamber 7 and the first gas analysis chamber 2.

[0024] Both sides of the gas analysis chamber 1 2 and the gas analysis chamber 2 7 are provided with detection light sources 3 and detectors 4 respectively. The gas analysis chamber 1 2 is provided with filters 23 at both ends, and the detection light sources 3 and detectors 4 are located outside the filters 23. The gas analysis chamber 2 7 is provided with filters 73 at both ends, and the detection light sources 3 and detectors 4 are located outside the filters 73.

[0025] Gas analysis chamber 2 and gas analysis chamber 1 respectively perform spectral analysis on the gas to be tested. Specifically, the gas is detected independently through two channels by the intake nozzles 2 61 and 11 set at the front and rear. When the gas concentrations of the gas intake nozzles 2 61 and 11 are the same or close, no alarm signal is issued.

[0026] When the gas concentration drawn in by the second suction nozzle 61 is greater than that drawn in by the first suction nozzle 11, an alarm signal is issued indicating a leak. Specifically, when the second suction nozzle 61 moves closer to the gas leak point, the gas concentration at the leak point is relatively high, resulting in a concentration difference between the gas concentration detected by the second gas analysis chamber 7 and the gas concentration detected by the first gas analysis chamber 2. At this time, an alarm signal is issued, indicating that there is a gas leak point near the second suction nozzle 61. This embodiment can quickly, accurately, and efficiently locate the leak point, thereby significantly improving the leak detection efficiency of the equipment.

[0027] Furthermore, by setting up two sets of independent suction nozzle 11 and gas analysis chamber 2 and suction nozzle 2 61 and gas analysis chamber 2 7, two gas streams can be detected and analyzed simultaneously, thereby enabling more efficient detection of gas leaks and pinpointing leak points. This further improves detection efficiency and meets the testing needs of production lines with fast production rhythms, such as assembly lines. Moreover, the two sets of detection are independent of each other and will not cause detection interference, making the detection results more accurate and reliable.

[0028] In this embodiment, the first air nozzle 11 and the second air nozzle 61 are integrated and installed on the same handle, with the second air nozzle 61 located at the front end of the handle and the first air nozzle 11 located at a position slightly behind the front end of the handle.

[0029] This embodiment also discloses a detection method for an inhalation-type dual-gas analyzer leak detector, including the following steps:

[0030] a. Move the gas with suction nozzle 2 61 and suction nozzle 11 set at the front and rear to the area to be tested. The suction nozzle 2 61 and suction nozzle 11 use vacuum pump 5 to deliver the gas into gas analysis chamber 2 7 and gas analysis chamber 1 2 respectively for spectral analysis.

[0031] b. When no gas leak occurs in the area to be tested, the gas drawn in by suction nozzle 2 61 and suction nozzle 11 is analyzed by the spectrometer of gas analysis chamber 2 7 and gas analysis chamber 1 2. The detection concentrations of the two gases are close (which can also be understood as the detection of the leak gas concentration index being zero), and therefore no alarm signal is issued.

[0032] c. When a gas leak occurs in the area to be tested, that is, when the second suction nozzle 61 and the first suction nozzle 11 perform gas intake detection in a wide range of ambient gas area 8, the gas concentration leaked in the ambient gas area 8 is basically close, and therefore no alarm signal is issued.

[0033] d. As the second suction nozzle 61 and the first suction nozzle 11 move further to detect the leak, until the second suction nozzle 61 moves to the leaking gas area 9, since the leaking gas area 9 is closer to the leak point, that is, the leaking gas concentration in the leaking gas area 9 is higher than the leaking gas concentration in the ambient gas area 8, at this time, an alarm signal is issued to detect the leak point.

[0034] Furthermore, in step c, after the second suction nozzle 61 and the first suction nozzle 11 perform suction detection on the ambient gas area 8, they can also issue a gas leak alarm signal to detect and alarm for gas leaks.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A suction type double gas analysis leak detector comprising a gas analysis chamber one (2) and a gas analysis chamber two (7) which are independently arranged, a vacuum pump (5) being connected to the gas outlet ends of the gas analysis chamber one (2) and the gas analysis chamber two (7), characterized in that: The gas analysis chamber 1 (2) is connected to the gas inlet 1 (21) and the gas analysis chamber 2 (7) is connected to the gas inlet 2 (71) and the gas inlet 2 (6). The gas inlet 2 (6) and the gas inlet 1 (1) are respectively provided with the suction nozzle 2 (61) and the suction nozzle 1 (11).

2. The dual gas leak detector of claim 1, wherein: The gas supply pipe (1) is provided with a filter (12) located between the air inlet (11) and the air inlet (21).

3. The dual gas leak detector of claim 1, wherein: The second air supply pipe (6) is provided with a filter (62) located between the second air inlet (61) and the second air outlet (71).

4. The dual gas leak detector of claim 1, wherein: The first outlet (22) of the gas analysis chamber (2) is connected to the first exhaust pipe (13), and the second outlet (72) of the gas analysis chamber (7) is connected to the second exhaust pipe (63). The other ends of the first exhaust pipe (13) and the second exhaust pipe (63) are connected to the vacuum pump (5).

5. The suction dual gas analytical leak detector as claimed in claim 4, wherein: A buffer tank (51) is provided between the first exhaust pipe (13), the second exhaust pipe (63) and the vacuum pump (5).

6. The dual gas leak detector of claim 1, wherein: The gas analysis chamber 1 (2) is provided with filter 1 (23) at both ends, and the gas analysis chamber 2 (7) is provided with filter 2 (73) at both ends.

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