Equipment for detecting sulfur hexafluoride in ambient air of workplace

Abstract

The utility model discloses detection equipment for sulfur hexafluoride in ambient air of a workplace, which comprises a shell, a transverse partition plate is arranged at the upper part in the shell, a sample gas chamber is arranged at the bottom of the transverse partition plate, one side of the sample gas chamber is communicated with a gas guide pipe, the top of the transverse partition plate is fixedly connected with a steady-flow brushless vacuum pump, and the steady-flow brushless vacuum pump is fixedly connected with a gas outlet of the shell. And the output end of the steady-flow brushless vacuum pump communicates with an air guide pipe, and one side of the inner wall of the shell is fixedly connected with an outer connector. The utility model relates to the technical field of sulfur hexafluoride gas detection, and solves the problems that in the prior art, when sulfur hexafluoride detection equipment is arranged in a working place environment, dust and other impurities in the working place are easily sucked into a sample gas chamber, the sensitivity of a sensor is influenced, the accuracy of a detection result is reduced, the service life of the detection equipment is influenced, and the detection cost is reduced. And equipment maintenance is relatively inconvenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the detection technology field of sulfur hexafluoride gas, concretely to a detection device of sulfur hexafluoride in the environment air of workplace. BACKGROUND

[0002] Sulfur hexafluoride is a colorless, toxic, flammable gas, has good electrical insulation performance and excellent arc extinguishing performance, is widely used in power production and power supply industry, such as pressure circuit breaker, transformer, mutual inductor, capacitor, lightning arrester, contactor, etc., sulfur hexafluoride itself is non-toxic, but in electrical equipment, through the corona, spark and arc discharge effect can produce a variety of toxic, corrosive gas, and because its density is about 5-6 times of air, easy to deposit in low-lying place, high concentration of sulfur hexafluoride can cause different degrees of harm to human body, such as nausea, vomiting, headache, insomnia, fatigue, etc., serious even possible to cause death, therefore, in the power industry, environmental monitoring, industrial production and laboratory research, etc. Workplace, the content of sulfur hexafluoride in the air needs to be strictly detected and controlled to guarantee the health and safety of staff and the sustainable development of environment. In the prior art, when the sulfur hexafluoride detection device is arranged in the workplace environment, the dust and other impurities in the workplace are easily sucked into the sample gas chamber, which affects the sensitivity of the sensor, reduces the accuracy of the detection result, affects the service life of the detection device, and the equipment maintenance is relatively inconvenient. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a detection device of sulfur hexafluoride in the environment air of workplace, solves the problem that in the prior art, when the sulfur hexafluoride detection device is arranged in the workplace environment, the dust and other impurities in the workplace are easily sucked into the sample gas chamber, which affects the sensitivity of the sensor, reduces the accuracy of the detection result, affects the service life of the detection device, and the equipment maintenance is relatively inconvenient.

[0004] In order to achieve the above object, the utility model discloses a kind of detection equipment of sulfur hexafluoride in workplace environment air, including shell, the inside upper portion of the shell is provided with transverse bulkhead, the bottom of the transverse bulkhead is provided with sample gas chamber, one side of the sample gas chamber is communicated with gas guide pipe, the top of the transverse bulkhead is fixedly connected with steady flow brushless vacuum pump, the output of the steady flow brushless vacuum pump is communicated with gas guide pipe, the inner wall side of the shell is fixedly connected with external connector, the outer wall of the external connector is threadedly connected with connecting pipe, the inner wall of the connecting pipe is matched with filter screen, the outer side of the connecting pipe is provided with dust cover, the input of the steady flow brushless vacuum pump is communicated with external connector by gas inlet pipe, the bottom of the side of the sample gas chamber away from gas guide pipe is communicated with exhaust pipe, the end of the exhaust pipe away from sample gas chamber is communicated with the outside of shell, the inner wall of the gas inlet pipe and exhaust pipe is respectively communicated with electromagnetic valve, the top side of the transverse bulkhead is provided with power storage module, the side of the shell away from dust cover is provided with controller, the steady flow brushless vacuum pump, electromagnetic valve and power storage module are electrically connected with controller.

[0005] Preferably, the inner wall of the shell is provided with an infrared light source away from the controller, the outer wall of the sample gas chamber is provided with a light transmission hole, the wavelength filter is provided with an infrared detector, and the infrared light source and the infrared detector are electrically connected with the controller.

[0006] Preferably, the inner wall of the gas guide pipe is communicated with a gas flow meter, and the inner wall of the sample gas chamber is provided with a pressure sensor.

[0007] Preferably, the outer wall of the connecting pipe is provided with a connecting rod, and the connecting rod is fixedly connected with the inner wall of the dust cover.

[0008] Preferably, the sample gas chamber is provided with a gas diffuser at the end away from the steady flow brushless vacuum pump.

[0009] The utility model provides a kind of detection equipment of sulfur hexafluoride in workplace environment air.It has the following beneficial effects: the detection equipment of sulfur hexafluoride in workplace environment air, by the cooperation between shell, transverse partition, sample gas chamber, gas guide pipe, steady flow brushless vacuum pump, external connector, connecting pipe, filter screen, dust cover, air inlet pipe, exhaust pipe, solenoid valve and controller, by being provided with filter structure at the sample gas collection interface of sulfur hexafluoride detection equipment, and dust cover is covered outside connecting pipe, can avoid foreign matter to cause the blockage of external connector in the detection equipment layout process, simultaneously using separable design, it is convenient to replace or clean when filter screen is blocked, filter gas by filter screen, can effectively avoid dust and impurities to be inhaled into sample gas chamber, to prevent dust accumulation influence the sensitivity and accuracy of data detection, effectively avoid the interference of external environment to detection result, like this help to improve the stability and service life of sulfur hexafluoride detection equipment in high dust environment.

[0010] By the cooperation between sample gas chamber, controller, infrared light source, light transmission hole, wavelength filter and infrared detector, sulfur hexafluoride detection equipment adopts the design of measurement channel and reference channel, filters by wavelength filter of different wavelength, can obtain infrared light of different wavelength, to obtain infrared detection data of different wavelength, it is convenient for control system to compare detection signal, to accurately measure the concentration of sulfur hexafluoride, like this can further improve the accuracy of detection result. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the structure schematic diagram of the utility model;

[0012] Figure 2 It is Figure 1 the top view of;

[0013] Figure 3 It is the appearance schematic diagram of the utility model;

[0014] Figure 4 It is Figure 1 the local enlarged view of A area in;

[0015] In the drawing: 1, shell;2, transverse partition;3, sample gas chamber;4, gas guide pipe;5, steady flow brushless vacuum pump;6, external connector;7, connecting pipe;8, filter screen;9, dust cover;10, air inlet pipe;11, exhaust pipe;12, solenoid valve;13, controller;14, infrared light source;15, light transmission hole;16, wavelength filter;17, infrared detector;18, gas flow meter;19, pressure sensor;20, connecting rod;21, isolation net;22, air sparseness grid;23, power storage module. DETAILED DESCRIPTION

[0016] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0017] In the prior art, when the sulfur hexafluoride detection equipment is laid in the workplace environment, dust and other impurities in the workplace are easily sucked into the sample gas chamber, affecting the sensitivity of the sensor, reducing the accuracy of the detection result, affecting the service life of the detection equipment, and the equipment maintenance is relatively inconvenient.

[0018] Therefore, the present application provides a sulfur hexafluoride detection equipment in the workplace environment air, through the cooperation between the shell, the transverse partition, the sample gas chamber, the gas guide pipe, the steady flow brushless vacuum pump, the external connector, the connecting pipe, the filter screen, the dust cover, the air inlet pipe, the exhaust pipe, the electromagnetic valve and the controller, by setting the filter structure at the sample gas collection interface of the sulfur hexafluoride detection equipment, and covering the dust cover outside the connecting pipe, avoiding the blockage of the foreign matter to the external connector during the laying of the detection equipment, and adopting the separable design, which is convenient for replacing or cleaning when the filter screen is blocked, when collecting the sample gas, filtering the collected gas through the filter screen, effectively avoiding the dust and impurities from being sucked into the sample gas chamber, preventing the dust accumulation from affecting the sensitivity and accuracy of the data detection, effectively avoiding the interference of the external environment on the detection result, thereby improving the stability and service life of the detection equipment in the high dust environment.

[0019] Through the personnel in the art, all electrical components in the case are connected to the power supply through wires, and appropriate controllers and encoders should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should be completed according to the working order between the electrical components in the following working principle, and the detailed connection means is the public technical knowledge in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0020] By Figures 1-4It can be known that a kind of detection equipment of sulfur hexafluoride in workplace environment air, including shell 1, the top of the inside of shell 1 is provided with cross partition 2, the bottom of cross partition 2 is provided with sample gas chamber 3, one side of sample gas chamber 3 is communicated with gas guide pipe 4, the top of cross partition 2 is fixedly connected with steady flow brushless vacuum pump 5, the output of steady flow brushless vacuum pump 5 is communicated with gas guide pipe 4, the inner wall of shell 1 one side is fixedly connected with external connector 6, the outer wall of external connector 6 is threadedly connected with connecting pipe 7, the inner wall of connecting pipe 7 is matched with filter screen 8, the outer side of connecting pipe 7 is provided with dust cover 9, the input of steady flow brushless vacuum pump 5 is communicated with external connector 6 by gas inlet pipe 10, the bottom of the side of sample gas chamber 3 away from gas guide pipe 4 is communicated with exhaust pipe 11, the end of exhaust pipe 11 away from sample gas chamber 3 is communicated with the outside of shell 1, the inner wall of gas inlet pipe 10 and exhaust pipe 11 is respectively communicated with electromagnetic valve 12, the top of cross partition 2 one side is provided with power storage module 23, the side of shell 1 away from dust cover 9 is provided with controller 13, steady flow brushless vacuum pump 5, electromagnetic valve 12 and power storage module 23 are electrically connected with controller 13;

[0021] In the implementation process, it is particularly worth pointing out that through the cooperation between the shell 1, the transverse partition plate 2 and the sample gas chamber 3, the transverse partition plate 2 divides the inside of the shell 1 into two spaces, the sample gas chamber 3 is arranged in the space at the bottom of the transverse partition plate 2, through the cooperation between the shell 1, the transverse partition plate 2, the sample gas chamber 3, the gas guide pipe 4, the stable flow brushless vacuum pump 5, the external connector 6, the air inlet pipe 10 and the electromagnetic valve 12, the gas guide pipe 4, the stable flow brushless vacuum pump 5, the external connector 6, the air inlet pipe 10 and the electromagnetic valve 12 form an air inlet system for sampling the sample gas, through the control of the stable flow brushless vacuum pump 5 and the electromagnetic valve 12, the gas in the external environment is introduced into the sample gas chamber 3 through the external connector 6, the collection of the sample gas is realized, so as to realize the subsequent detection of sulfur hexafluoride, and when the sample gas is not collected, the electromagnetic valve 12 at the air inlet pipe 10 is in a closed state, so that the sample gas chamber 3 is in a sealed state, through the cooperation between the external connector 6, the connecting pipe 7, the filter screen 8 and the dust cover 9, the connecting pipe 7 is installed outside the external connector 6 in a threaded connection manner, and the filter screen 8 is clamped in the inside of the connecting pipe 7, when the sample gas is collected, the gas in the external environment is sucked into the inside of the dust cover 9 through the gap between the dust cover 9 and the shell 1, is filtered through the filter screen 8 and is then sucked into the air inlet pipe 10, so that the filtering of the sample gas is realized, dust and impurities are prevented from being sucked into the sample gas chamber 3, meanwhile, the dust cover 9 is covered outside the connecting pipe 7, so that the external connector 6 is prevented from being blocked during the arrangement of the detection equipment, through the cooperation between the sample gas chamber 3, the exhaust pipe 11 and the electromagnetic valve 12, an exhaust system of the sample gas chamber 3 is formed, before the detection of the sample gas, the controller 13 controls the electromagnetic valve 12 at the exhaust pipe 11 to be opened, the collected gas is continuously conveyed into the sample gas chamber 3, under the action of pressure, the original gas in the inside of the sample gas chamber 3 is discharged from the exhaust pipe 11, the replacement of the gas in the sample gas chamber 3 is realized, after a certain time of gas replacement, the sulfur hexafluoride is detected, the accuracy of the detection data is improved, the storage power module 23 adopts a rechargeable lithium battery, provides power support for the whole detection equipment, ensures that the equipment normally works in an environment without external power supply, improves the portability and applicability of the equipment, the controller 13 adopts a high-performance microprocessor, has strong data processing and logical judgment capabilities, can accurately control the stable flow brushless vacuum pump 5, the electromagnetic valve 12 and other components according to a preset program, automatically detects at a set time, reduces the complexity and errors of manual operation, meanwhile, the controller 13 also has an abnormal alarm function, when the concentration of sulfur hexafluoride exceeds a preset threshold value, can automatically trigger an alarm system, timely reminds the staff to take corresponding measures, avoids the occurrence of safety accidents, through the cooperation between the shell 1, the transverse partition plate 2, the sample gas chamber 3, the gas guide pipe 4, the stable flow brushless vacuum pump 5, the external connector 6, the connecting pipe 7, the filter screen 8, the dust cover 9, the air inlet pipe 10, the exhaust pipe 11, the electromagnetic valve 12 and the controller 13, through the arrangement of the filtering structure at the sample gas collection interface of the sulfur hexafluoride detection equipment and the covering of the dust cover 9 outside the connecting pipe 7,The external connector 6 is prevented from being blocked by foreign matters during the detection device laying process, and the separable design is adopted, so that the filter screen 8 can be replaced or cleaned when the filter screen 8 is blocked. When the sample gas is collected, the collected gas is filtered by the filter screen 8, so that the dust and impurities are effectively prevented from being sucked into the sample gas chamber 3, the dust accumulation is prevented from affecting the sensitivity and accuracy of data detection, the interference of the external environment on the detection result is effectively avoided, and the stability and service life of the sulfur hexafluoride detection device in a high-dust environment are improved. The specific models of the steady flow brushless vacuum pump 5, the electromagnetic valve 12 and the controller 13 are not limited, and the use requirements can be met.

[0022] Further, the inner wall of the shell 1 is equidistantly provided with an infrared light source 14 away from the controller 13, the outer walls on both sides of the sample gas chamber 3 are equidistantly provided with light transmission holes 15, the shell 1 is equidistantly provided with a wavelength filter 16 away from the infrared light source 14 on the side of the sample gas chamber 3, the wavelength filter 16 is provided with an infrared detector 17 away from the sample gas chamber 3, the light transmission holes 15, the wavelength filter 16 and the infrared detector 17 are correspondingly provided with the infrared light source 14, and the infrared light source 14 and the infrared detector 17 are electrically connected with the controller 13.

[0023] In the implementation process, it is particularly worth pointing out that the infrared detector 17 is a thermopile detector or a micro-electro-mechanical system (MEMS) infrared detector. Different wavelengths of infrared light are received by the infrared detector 17 and converted into electrical signals. After amplification and processing, the electrical signals are analyzed and calculated by the controller 13 to obtain the concentration value of sulfur hexafluoride gas. Through the cooperation between the sample gas chamber 3, the controller 13, the infrared light source 14, the light transmission hole 15, the wavelength filter 16, and the infrared detector 17, the infrared light source 14 emits infrared light, which is respectively incident into two light transmission holes 15 and enters the sample gas chamber 3, and is emitted by the other two light transmission holes 15. A double-beam detection channel, i.e., a measurement channel and a reference channel, is formed inside the sulfur hexafluoride detection device. Sulfur hexafluoride in the measurement channel is absorbed at a rate of 947 cm-1 (corresponding to a center wavelength of 10.55 μm). The reference channel is not within the absorption range of sulfur hexafluoride and the unabsorbed infrared light is filtered by the wavelength filter 16 of different wavelengths to obtain infrared light of different wavelengths, which is received by the infrared detector 17. The infrared detector 17 converts the received infrared light signal into an electrical signal and transmits it to the control system of the detection device. Finally, the control system calculates the gas concentration of sulfur hexafluoride according to the Lambert-Beer law (the output signal of the device is proportional to the amount of infrared light absorption) by measuring the light intensity attenuation value. Through the cooperation between the sample gas chamber 3, the controller 13, the infrared light source 14, the light transmission hole 15, the wavelength filter 16, and the infrared detector 17, the sulfur hexafluoride detection device adopts the design of the measurement channel and the reference channel. The wavelength filter 16 of different wavelengths is used to filter different wavelengths of infrared light to obtain different wavelengths of infrared detection data, so that the control system can compare the detection signals to accurately measure the concentration of sulfur hexafluoride and further improve the accuracy of the detection results. The specific model of the infrared light source 14 and the infrared detector 17 is not limited and can meet the use requirements;

[0024] Further, the inner wall of the gas guide pipe 4 is communicated with a gas flow meter 18, and the inner wall top of the sample gas chamber 3 is installed with a pressure sensor 19. The gas flow meter 18 and the pressure sensor 19 are electrically connected with the controller 13;

[0025] In the specific implementation process, it is worth pointing out that, through the cooperation between the gas guide pipe 4 and the gas flow meter 18, the gas flow meter 18 measures the sample gas flow delivered to the sample gas chamber 3 and transmits the measurement results to the controller 13 in real time, and the controller 13 monitors and adjusts the sample gas flow, and at the same time, when the sample gas delivery is abnormal, an alarm is sent in time to remind the staff to check and maintain, avoid the error of the detection result and the damage of the detection device, ensure the stability and accuracy of the sample gas flow, thereby improve the reliability and precision of the detection, through the cooperation of the sample gas chamber 3 and the pressure sensor 19, the pressure sensor 19 monitors the gas pressure in the sample gas chamber 3 in real time, and feeds back the pressure data to the controller 13, and the controller 13 monitors the pressure in the sample gas chamber 3 according to the pressure data, ensures that the gas pressure in the sample gas chamber 3 is maintained within the preset range, so as to ensure the stability and accuracy of the detection process, wherein the specific type of the gas flow meter 18 and the pressure sensor 19 is not limited, which meets the use requirement;

[0026] Further, the outer wall of the connecting pipe 7 is equidistantly provided with a connecting rod 20, the connecting rod 20 is fixedly connected with the inner wall of the dust cover 9, and the dust cover 9 is provided with a isolation net 21 on the side of the connecting rod 20;

[0027] In the specific implementation process, it is worth pointing out that, through the cooperation between the connecting pipe 7, the dust cover 9, the connecting rod 20 and the isolation net 21, the dust cover 9 is connected with the connecting pipe 7 through the connecting rod 20, the stability of the dust cover 9 is improved, and at the same time, the isolation net 21 is arranged on the inner side of the connecting rod 20, which effectively prevents the blocking of the filter screen 8 by large particles;

[0028] Further, the sample gas chamber 3 is provided with an air diffuser 22 at the end of the gas guide pipe 4 away from the steady-flow brushless vacuum pump 5;

[0029] In the specific implementation process, it is worth pointing out that, the air diffuser 22 is used for uniformly distributing the collected sample gas delivered to the sample gas chamber 3, so that the sample gas is uniformly distributed in the sample gas chamber 3, and the accuracy and reliability of the detection result are ensured.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for detecting sulphur hexafluoride in the air of the environment of a work site, comprising a casing (1), characterised in that: The inside of the shell (1) is provided with a transverse partition plate (2), the bottom of the transverse partition plate (2) is provided with a sample gas chamber (3), one side of the sample gas chamber (3) is communicated with a gas guide pipe (4), the top of the transverse partition plate (2) is fixedly connected with a steady flow brushless vacuum pump (5), the output end of the steady flow brushless vacuum pump (5) is communicated with the gas guide pipe (4), one side of the inner wall of the shell (1) is fixedly connected with an external connector (6), the outer wall of the external connector (6) is threadedly connected with a connecting pipe (7), the inner wall of the connecting pipe (7) is matched with a filter screen (8), the outer side of the connecting pipe (7) is provided with a dust cover (9), the input end of the steady flow brushless vacuum pump (5) is communicated with the external connector (6) through an air inlet pipe (10), the bottom of the side of the sample gas chamber (3) away from the gas guide pipe (4) is communicated with an exhaust pipe (11), the end of the exhaust pipe (11) away from the sample gas chamber (3) is communicated with the outside of the shell (1), the inner walls of the air inlet pipe (10) and the exhaust pipe (11) are respectively communicated with electromagnetic valves (12), one side of the top of the transverse partition plate (2) is provided with an electricity storage module (23), one side of the shell (1) away from the dust cover (9) is provided with a controller (13), the steady flow brushless vacuum pump (5), the electromagnetic valves (12) and the electricity storage module (23) are electrically connected with the controller (13).

2. A device for detecting sulfur hexafluoride in an ambient air of a workplace environment according to claim 1, characterized in that: The inner wall of the shell (1) is provided with an infrared light source (14) away from the controller (13), the outer walls of the two sides of the sample gas chamber (3) are both provided with light transmission holes (15) at equal intervals, the shell (1) is provided with a wavelength filter (16) away from the infrared light source (14) on the side of the sample gas chamber (3), the wavelength filter (16) is provided with an infrared detector (17) away from the sample gas chamber (3), the light transmission holes (15), the wavelength filter (16) and the infrared detector (17) are all arranged correspondingly with the infrared light source (14), the infrared light source (14) and the infrared detector (17) are electrically connected with the controller (13).

3. A device for detecting sulfur hexafluoride in an air of a workplace environment according to claim 1, characterized in that: The inner wall of the gas guide pipe (4) is communicated with a gas flow meter (18), the inner wall of the top of the sample gas chamber (3) is provided with a pressure sensor (19), the gas flow meter (18) and the pressure sensor (19) are electrically connected with the controller (13).

4. A device for detecting sulfur hexafluoride in an air of a workplace environment according to claim 1, characterized in that: The outer wall of the connecting pipe (7) is provided with connecting rods (20) at equal intervals, the connecting rods (20) are fixedly connected with the inner wall of the dust cover (9), the inside of the dust cover (9) is provided with a separation net (21) on the side of the connecting rods (20).

5. A device for detecting sulfur hexafluoride in an air of a workplace environment according to claim 1, characterized in that: The sample gas chamber (3) is provided with an air diffuser (22) away from the steady flow brushless vacuum pump (5) on the end of the gas guide pipe (4).

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