Auxiliary device for continuous detection of infrared leak detector

Abstract

The utility model relates to an auxiliary device for continuous detection of an infrared leak detector, and relates to the field of infrared leak detection technology, the auxiliary device comprises a slide block, a connecting pipe is detachably mounted on the slide block, and one end, far away from the slide block, of the connecting pipe is detachably and fixedly connected with an air inlet port of a probe; the bottom of the sliding block is provided with an air inlet used for exposing a pipe opening of the connecting pipe, the bottom of the sliding block is rotationally provided with two sets of rolling wheels, the two sets of rolling wheels are arranged on the two sides of the air inlet respectively, the two opposite side walls of the sliding block are provided with holding grooves, and thin film pressure sensors are fixedly installed in the holding grooves respectively. When the holding pressure measured by the two thin film pressure sensors is larger than a set value, the single-chip microcomputer in signal connection with the signal output ends of the two thin film pressure sensors controls the air pump and the NDIR sensor to operate. According to the invention, the accuracy of leakage point positioning of the infrared leakage detector can be improved.

Description

Technical Field

[0001] The present application relates to the field of infrared leak detection technology, and in particular to an auxiliary device for continuous detection of an infrared leak detector. Background Art

[0002] Sulfur hexafluoride (SF6) gas is a colorless, odorless, and non-toxic gas at room temperature and pressure. It does not burn. It is thermally stable and chemically inactive. It has good electrical insulation and arc extinguishing properties, and its insulation properties are 2 to 3 times that of air. Moreover, the higher the gas pressure, the higher the insulation properties. Therefore, sulfur hexafluoride (SF6) gas is widely used as an insulating medium in high-voltage electrical equipment, including circuit breakers, GIS, power transformers, etc. Because of the large-scale use of SF6 gas, its safety has also received widespread attention. The leaked SF6 gas will accumulate in the lower space of the room, causing local hypoxia, posing a serious danger to the life safety of the staff entering the room. Therefore, it has become very important to measure the concentration of sulfur hexafluoride (SF6) gas in the working environment of the computer room to ensure the personal safety of the staff.

[0003] The principle of non-dispersive infrared (NDIR) detection is to use SF6 as a greenhouse gas, which has a strong absorption characteristic for infrared light in a specific band. There is an infrared emission source at one end of the sensor, which emits infrared rays, which are reflected back to the infrared receiving element and reference element at the transmitting end through the concave mirror at the other end. If there is SF6 gas in the infrared light path, SF6 gas will absorb infrared rays with a wavelength of 10.4μm. By comparing the photosensitive voltage values ​​on the receiving element and the reference element, the corresponding SF6 gas concentration value can be measured.

[0004] Common non-dispersive infrared leak detectors mainly include a casing and a probe. The NDIR sensor is installed in the sensing cavity inside the casing. The probe is connected to the sensing cavity through a gas pipeline. An air pump is installed on the gas pipeline. The air pump is installed inside the casing. During the detection process, the user holds the probe and moves it at a constant speed outside the mechanism to be detected. The air pump sucks the gas around the mechanism to be detected and transports it to the sensing cavity. The NDIR sensor can detect the SF6 content in the gas and display it, and at the same time alarm at the location with high SF6 content.

[0005] However, when conducting leak detection on large equipment, in order to accurately locate the leak on the equipment, it is difficult for the user to keep a constant distance between the probe and the surface of the equipment when holding the probe to detect around the equipment. As the distance from the leak increases, there are differences in the SF6 content in the gas inhaled by the probe, making it difficult to ensure that the user can accurately locate the leak on the equipment. There is room for improvement. Utility Model Content

[0006] In order to improve the accuracy of locating leak points on equipment by users using an infrared leak detector, the present application provides an auxiliary device for continuous detection of an infrared leak detector.

[0007] The present application provides an auxiliary device for continuous detection of an infrared leak detector using the following technical solution:

[0008] An auxiliary device for continuous detection of an infrared leak detector comprises a slider, a connecting pipe is detachably mounted on the slider, and an end of the connecting pipe away from the slider is detachably fixedly connected to an air inlet port of a probe;

[0009] An air inlet for exposing the pipe opening of the connecting pipe is provided at the bottom of the slider, and two groups of rollers are rotatably mounted at the bottom of the slider, and the two groups of rollers are respectively arranged on both sides of the air inlet.

[0010] By adopting the above technical solution, in the actual detection process, the user holds the slider so that the two sets of rollers at the bottom of the slider fit with the outer wall of the device to be tested (or the mechanism to be tested, such as a pipeline, tank, etc.), and then the user pushes the slider at a constant speed across the surface of the device to be tested. The gas on the surface of the device to be tested is sucked into the sensing cavity through the connecting pipe, the probe and the air intake pipe. The NDIR sensor detects the SF6 content in the gas to calculate whether there is SF6 gas leakage at that location, the leakage rate of SF6 gas and other information. During the detection process, the distance between the pipe mouth of the connecting pipe and the outer wall surface of the device is kept fixed, reducing the occurrence of uneven gas sampling due to the deviation of the user moving the probe, and ensuring the accuracy of the SF6 gas content measurement in the gas to be tested.

[0011] Preferably, the connecting tube is a telescopic tube.

[0012] By adopting the above technical solution, since the telescopic tube can be extended or retracted, the convenience of the user sliding the slider to detect the leakage point can be improved.

[0013] Preferably, the telescopic tube includes a mounting portion, the sliding block is provided with a mounting screw hole matched with the mounting portion, an outer side wall of the mounting portion is provided with an external thread, and the mounting portion is threadedly connected in the mounting screw hole.

[0014] By adopting the above technical solution, since the mounting portion of the telescopic tube is threadedly connected in the mounting hole, it is convenient for the user to disassemble and assemble the telescopic tube and clean the telescopic tube.

[0015] Preferably, a filter plate is fixedly connected to the port of the mounting portion.

[0016] By adopting the above technical solution, the filter plate can reduce the occurrence of impurities such as ash in the gas to be detected entering the probe, the air intake duct, and the casing through the telescopic tube, thereby reducing the impact of ash absorbing infrared rays on the detection results, which can further improve the measurement accuracy of the infrared leak detector.

[0017] Preferably, an activated carbon sintered filter element is detachably installed in the installation portion.

[0018] By adopting the above technical solution, the activated carbon sintered filter element can further absorb the ash carried in the gas to be detected, and at the same time, it can absorb the moisture in the gas to be detected, thereby reducing the occurrence of moisture entering the casing to form condensed water and causing damage to the electronic components in the casing.

[0019] Preferably, gripping grooves are provided on two opposite sides of the sliding block.

[0020] By adopting the above technical solution, the holding groove can facilitate the user to firmly hold the slider and move the slider, which can reduce the occurrence of the slider falling off during the sliding process.

[0021] Preferably, a flexible cushion layer is fixedly connected to the bottom of the gripping groove.

[0022] By adopting the above technical solution, the flexible cushion layer can improve the comfort of the user holding the slider, and the flexible cushion layer can further reduce the occurrence of the slider falling off when the user slides the slider.

[0023] Preferably, a thin film pressure sensor is fixedly connected to the groove bottom of the gripping groove, and two of the thin film pressure sensors are respectively located between the two flexible cushion layers and the groove bottom of the gripping groove, and the two thin film pressure sensors detect the gripping pressure and output a gripping pressure signal;

[0024] The signal output ends of the two film pressure sensors are connected to a single chip microcomputer, which receives the two gripping pressure signals and outputs a control signal when the two gripping pressure signals are greater than a set value;

[0025] The signal output end of the single chip microcomputer is connected to the signal input end of the air pump and the NDIR sensor, and the air pump and the NDIR sensor receive the control signal and operate.

[0026] By adopting the above technical solution, when the user holds the slider and slides the slider, the user's fingers holding the slider apply holding pressure to the two thin film pressure sensors respectively and output holding pressure signals respectively. The single chip microcomputer receives the two holding pressure signals and compares them. When the two holding pressures are both greater than the set values, it can be determined that the user holds the slider and pushes the slider to perform a leak detection operation. The single chip microcomputer controls the operation of the air pump and the NDIR sensor, which can realize the action of automatically sensing the holding of the slider for leak detection and automatically starting the operation of the air pump and the NDIR sensor, thereby further improving the convenience of users using the infrared leak detector.

[0027] Preferably, an LED lamp is fixedly connected to the slider, a signal input end of the LED lamp is signal-connected to a signal output end of the single-chip microcomputer, and the LED lamp receives the control signal and emits light.

[0028] By adopting the above technical solution, the user can judge whether the air pump and the NDIR sensor are operating normally through the status of the LED light.

[0029] In summary, the auxiliary device for continuous detection of an infrared leak detector of the present application includes at least one of the following beneficial technical effects:

[0030] 1. Through the combination and use of the slider, telescopic tube, and two sets of rollers, the user can hold the slider and push it at a constant speed to pass through the outer wall surface of the device to be inspected during the process of leak detection on the device (or mechanism) to be inspected. The gas on the surface of the device to be inspected enters the sensing chamber through the telescopic tube, the probe, and the air intake pipe. In the process of collecting the gas to be detected, the distance between the port of the telescopic tube and the surface of the device to be inspected is always constant, which can effectively ensure the accuracy of the NDIR sensor in measuring the SF6 gas content in the detected gas, thereby improving the accuracy of the infrared leak detector in locating and measuring the leak point;

[0031] 2. Through the coordination and use of two thin film pressure sensors, a single-chip microcomputer, an air pump, an NDIR sensor and an LED light, the air pump and the NDIR sensor can be automatically controlled to start when the user holds the slider and pushes the slider to pass over the surface of the equipment to be inspected at a constant speed, thereby achieving the technical effect of automatically sensing and starting the air pump and the NDIR sensor. In addition, during the leak detection process, the user can judge whether the air pump and the NDIR sensor are operating normally based on whether the LED light is lit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of an embodiment of the present application for demonstrating the overall structure of the auxiliary device.

[0033] Figure 2 It is a schematic diagram of an embodiment of the present application for illustrating the internal structure of an auxiliary device.

[0034] Figure 3 It is a schematic diagram of an embodiment of the present application for demonstrating internal signal transmission of an auxiliary device.

[0035] Explanation of the reference numerals: 1. Slider; 11. Air inlet; 12. Roller; 13. Mounting screw hole; 14. Holding groove; 15. Flexible cushion layer; 2. Telescopic tube; 21. Mounting part; 22. Filter plate; 23. Activated carbon sintered filter element; 3. Thin film pressure sensor; 4. LED light. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-3 This application is described in further detail.

[0037] Example

[0038] The present application embodiment discloses an auxiliary device for continuous detection of an infrared leak detector. Figure 1 and Figure 2 It mainly includes a slider 1, on which a connecting pipe is detachably mounted, and one end of the connecting pipe away from the slider 1 is detachably fixedly connected to the air inlet port of the probe.

[0039] An air inlet 11 for exposing the pipe opening of the connecting pipe is provided at the bottom of the slider 1 . Two groups of rollers 12 are rotatably mounted at the bottom of the slider 1 . The two groups of rollers 12 are arranged on both sides of the air inlet 11 .

[0040] In the actual detection process, the user holds the slider 1 so that the two sets of rollers 12 at the bottom of the slider 1 fit with the outer wall of the device to be inspected (or the mechanism to be inspected, such as a pipeline, a tank, etc.), and then the user pushes the slider 1 at a constant speed to pass over the surface of the device to be inspected. The gas on the surface of the device to be inspected is sucked into the sensing cavity through the connecting pipe, the probe and the air intake pipe. The NDIR sensor detects the SF6 content in the gas and can calculate whether there is SF6 gas leakage at that location, the leakage rate of SF6 gas and other information.

[0041] During the detection process, the distance between the pipe mouth of the connecting pipe and the outer wall surface of the equipment remains fixed, reducing the occurrence of uneven gas sampling due to deviation in the user's movement of the probe, and ensuring the accuracy of the measurement of the SF6 gas content in the gas to be detected.

[0042] It should be noted that, in the embodiment of the present application, the connecting tube is a telescopic tube 2. Since the telescopic tube 2 can be extended or retracted, the convenience of the user sliding the slider 1 to detect the leak point can be improved.

[0043] Reference Figure 2 The telescopic tube 2 includes a mounting portion 21 , a mounting screw hole 13 matching the mounting portion 21 is provided on the slider 1 , an external thread is provided on the outer wall of the mounting portion 21 , and the mounting portion 21 is threadedly connected in the mounting screw hole 13 .

[0044] Among them, a filter plate 22 is fixedly installed at the pipe mouth of the installation part 21, and an activated carbon sintered filter element 23 is detachably installed on the inner wall of the installation part 21. In the process of collecting the gas to be detected, the gas to be detected passes through the filter plate 22 and the activated carbon sintered filter element 23 in turn and then enters the probe.

[0045] Since the mounting portion 21 of the telescopic tube 2 is threadedly connected in the mounting hole, it is convenient for the user to disassemble and assemble the telescopic tube 2 and clean the telescopic tube 2 .

[0046] The filter plate 22 can reduce the occurrence of impurities such as ash in the gas to be detected entering the probe, the air intake pipe, and the casing through the telescopic tube 2, thereby reducing the occurrence of the influence of ash absorbing infrared rays on the detection results, which can further improve the measurement accuracy of the infrared leak detector.

[0047] The activated carbon sintered filter element 23 can further absorb the ash carried in the gas to be detected, and at the same time, can absorb the moisture in the gas to be detected, which can reduce the occurrence of moisture entering the casing to form condensed water and causing damage to the electronic components in the casing.

[0048] Reference Figure 1 and Figure 2 In the embodiment of the present application, gripping grooves 14 are provided on opposite sides of the slider 1. The gripping grooves 14 can facilitate the user to firmly grip the slider 1 and move the slider 1, thereby reducing the possibility of the slider 1 falling off during the sliding process.

[0049] The bottom of the gripping groove 14 is fixedly connected with a flexible cushion layer 15. The flexible cushion layer 15 can improve the comfort of the user gripping the slider 1, and the flexible cushion layer 15 can further reduce the occurrence of the slider 1 falling off when the user slides the slider 1.

[0050] Reference Figure 2 and Figure 3 A thin film pressure sensor 3 is fixedly connected to the bottom of the gripping groove 14. The two thin film pressure sensors 3 are respectively located between the two flexible pads 15 and the bottom of the gripping groove 14. The two thin film pressure sensors 3 detect the gripping pressure and output a gripping pressure signal.

[0051] The signal output ends of the two film pressure sensors 3 are connected to a single chip microcomputer, which receives two gripping pressure signals and outputs a control signal when both gripping pressure signals are greater than a set value.

[0052] The signal output end of the single chip microcomputer is connected with the signal input end of the air pump and the NDIR sensor, and the air pump and the NDIR sensor receive the control signal and operate.

[0053] When the user holds the slider 1 and slides the slider 1, the user's fingers holding the slider 1 apply holding pressure to the two film pressure sensors 3 respectively and output holding pressure signals respectively. The single chip microcomputer receives the two holding pressure signals and compares them. When the two holding pressures are both greater than the set values, it can be determined that the user holds the slider 1 and pushes the slider 1 to perform a leak detection operation. The single chip microcomputer controls the operation of the air pump and the NDIR sensor, which can realize the action of automatically sensing the holding of the slider 1 for leak detection and automatically starting the operation of the air pump and the NDIR sensor, thereby further improving the convenience of the user in using the infrared leak detector.

[0054] Reference Figure 1 and Figure 3 The slider 1 is fixedly connected with an LED lamp 4, the signal input end of the LED lamp 4 is connected with the signal output end of the single chip computer, and the LED lamp 4 receives the control signal and emits light. Through the state of the LED lamp 4, the user can judge whether the air pump and the NDIR sensor are operating normally.

[0055] The implementation principle of the auxiliary device for continuous detection of an infrared leak detector in the embodiment of the present application is as follows: through the mutual coordination and use of the slider 1, the telescopic tube 2, and the two sets of rollers 12, the user can hold the slider 1 and push the slider 1 at a constant speed to pass through the outer wall surface of the device to be inspected during the process of leak detection on the device (or mechanism) to be inspected, and the gas on the surface of the device to be inspected enters the sensing chamber through the telescopic tube 2, the probe and the air intake pipe. During the process of collecting the gas to be detected, the distance between the port of the telescopic tube 2 and the surface of the device to be inspected is always constant, which can effectively ensure the accuracy of the NDIR sensor in measuring the SF6 gas content in the detected gas, thereby improving the accuracy of the infrared leak detector in locating and measuring the leak point; through the mutual coordination and use of the two thin film pressure sensors 3, the single chip microcomputer, the air pump, the NDIR sensor, and the LED lamp 4, the air pump and the NDIR sensor can be automatically controlled to start in the process of the user holding the slider 1 and pushing the slider 1 to pass through the surface of the device to be inspected at a constant speed, thereby achieving the technical effect of automatically sensing and starting the air pump and the NDIR sensor, and during the leak detection process, the user can judge whether the air pump and the NDIR sensor are operating normally according to whether the LED lamp 4 is lit.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An auxiliary device for continuous detection of infrared leak detectors, It is characterized in that It comprises a slider (1), on which a connecting pipe is detachably mounted, and one end of the connecting pipe away from the slider (1) is detachably fixedly connected to an air inlet port of a probe; The bottom of the slider (1) is provided with an air inlet (11) for exposing the pipe opening of the connecting pipe, and the bottom of the slider (1) is rotatably mounted with two groups of rollers (12), the two groups of rollers (12) being arranged on both sides of the air inlet (11) respectively; The connecting pipe is a telescopic pipe (2); The telescopic tube (2) comprises a mounting portion (21), the slider (1) is provided with a mounting screw hole (13) adapted to the mounting portion (21), an outer wall of the mounting portion (21) is provided with an external thread, and the mounting portion (21) is threadedly connected in the mounting screw hole (13); A filter plate (22) is fixedly connected to the port of the mounting portion (21); An activated carbon sintered filter element (23) is detachably installed in the installation portion (21); The slider (1) is provided with gripping grooves (14) on two opposite sides; A flexible cushion layer (15) is fixedly connected to the bottom of the gripping groove (14); A thin film pressure sensor (3) is fixedly connected to the bottom of the holding groove (14), and two of the thin film pressure sensors (3) are respectively located between the two flexible cushion layers (15) and the bottom of the holding groove (14), and the two thin film pressure sensors (3) detect holding pressure and output holding pressure signals; The signal output ends of the two film pressure sensors (3) are connected to a single chip microcomputer, the single chip microcomputer receives the two gripping pressure signals and outputs a control signal when both the gripping pressure signals are greater than a set value; The signal output end of the single chip microcomputer is connected to the signal input end of the air pump and the NDIR sensor, and the air pump and the NDIR sensor receive the control signal and operate.

2. The auxiliary device for continuous detection of an infrared leak detector according to claim 1, It is characterized in that The slider (1) is fixedly connected with an LED lamp (4), the signal input end of the LED lamp (4) being signal-connected to the signal output end of the single-chip computer, and the LED lamp (4) receives the control signal and emits light.

Images