阅读说明：本技术 一种便携式气体检漏装置 (Portable gas leakage detection device ) 是由 康哲 马助兴 徐红元 王进考 张立硕 刘子豪 冯亮 李晓光 刘永钊 高禄恒 于 2020-06-28 设计创作，主要内容包括：本发明公开了一种便携式气体检漏装置,包括气流通道、固定连接在气流通道前端的连接口、固定连通在气流通道侧部的泡沫液存储腔室以及固定连接在气流通道后端的喷嘴；所述连接口用于密封连接六氟化硫设备的充气口,所述泡沫液存储腔室内用于存储泡沫液,所述喷嘴用于观测气泡发出。检漏装置通过标准接口与六氟化硫设备充气口进行密封性对接,连接快速方便提高密封连接的密封性；在检漏装置内部可以存储泡沫液,无需单独配置泡沫液,便于及时进行检验气体泄漏的操作；可以通过小孔吹出气泡便于观察判断,操作人员更加直观的观察漏气情况；本装置能够大幅提高六氟化硫设备充气口检漏效率,检漏结果更加可靠,该装置成本低廉,普遍适用性强。(The invention discloses a portable gas leakage detection device, which comprises an airflow channel, a connecting port fixedly connected to the front end of the airflow channel, a foam concentrate storage chamber fixedly communicated with the side part of the airflow channel, and a nozzle fixedly connected to the rear end of the airflow channel, wherein the foam concentrate storage chamber is communicated with the side part of the airflow channel; the connecting port is used for being connected with an inflation port of sulfur hexafluoride equipment in a sealing mode, the foam liquid storage chamber is used for storing foam liquid, and the nozzle is used for observing the emission of bubbles. The leak detection device is in sealing butt joint with the inflation inlet of the sulfur hexafluoride equipment through the standard interface, so that the connection is quick and convenient, and the sealing performance of the sealing connection is improved; the foam liquid can be stored in the leak detection device, and the foam liquid does not need to be independently prepared, so that the operation of detecting gas leakage is convenient to carry out in time; bubbles can be blown out through the small holes, so that observation and judgment are facilitated, and operators can observe the air leakage condition more intuitively; the device can greatly improve the leakage detection efficiency of the inflation inlet of the sulfur hexafluoride equipment, the leakage detection result is more reliable, the device is low in cost, and the general applicability is strong.)

1. A portable gas leak detection device is characterized in that: comprises an airflow channel (5), a connecting port (1) fixedly connected with the front end of the airflow channel (5), a foam concentrate storage chamber (2) fixedly communicated with the side part of the airflow channel (5) and a nozzle (4) fixedly connected with the rear end of the airflow channel (5);

the connecting port (1) is used for being connected with an inflation port of sulfur hexafluoride equipment in a sealing mode, the foam liquid storage chamber (2) is used for storing foam liquid, and the nozzle (4) is used for observing the emission of bubbles.

2. A portable gas leak detection apparatus according to claim 1, wherein: the inner side of the connecting port (1) is provided with an inner connecting thread (11), and the inner connecting thread (11) is matched with an outer thread of an inflation inlet of sulfur hexafluoride equipment.

3. A portable gas leak detection apparatus according to claim 2, wherein: the inner diameter of the connecting port (1) is larger than that of the airflow channel (5), an annular platform is formed at the front ends of the connecting port (1) and the airflow channel (5), and a sealing gasket (12) attached to the annular platform is arranged in the connecting port (1).

4. A portable gas leak detection apparatus according to claim 3, wherein: the air purifier also comprises a button switch (3) fixedly arranged on the outer side of the air flow channel (5) and a blocking partition plate (31) fixedly connected to the button switch (3) and positioned in the air flow channel (5);

the button switch (3) controls the blocking partition plate (31) to switch on and off the flow of the airflow in the airflow channel (5).

5. A portable gas leak detection apparatus according to claim 4, wherein: the blocking baffle (31) is located to the left of the foam concentrate storage chamber (2).

6. A portable gas leak detection apparatus according to any one of claims 1-5, wherein: the foam liquid storage chamber (2) is made of soft plastic materials.

7. A portable gas leak detection apparatus according to claim 5, wherein: the foam liquid storage chamber (2) is made of metal materials, and the foam liquid storage chamber (2) is communicated with an inflatable bag (8) through a pressurizing air pipe (7).

8. A portable gas leak detection apparatus according to claim 7, wherein: and a non-return assembly (6) covering the upper port of the foam liquid storage chamber (2) is arranged in the air flow channel (5).

9. A portable gas leak detection apparatus according to claim 8, wherein: the non-return assembly (6) comprises a water permeable pore plate (61) and a water blocking blind plate (62) fixed on the water permeable pore plate (61) through a fixing screw (63);

the water-blocking blind plate (62) is positioned above the water-permeable pore plate (61), and a gap is reserved between the lower surface of the water-blocking blind plate (62) and the upper surface of the water-permeable pore plate (61).

10. A portable gas leak detection apparatus according to claim 9, wherein: a fixed mounting hole (65) for mounting a fixing screw (63) is formed in the center of the water permeable pore plate (61);

and the water-permeable pore plate (61) is provided with a through hole (64) for allowing foam liquid in the foam liquid storage chamber (2) to flow into the air flow channel (5).

Technical Field

The invention relates to a portable gas leakage detection device, and belongs to SF (sulfur hexafluoride) of a transformer substation₆Gas detection device of the equipment.

Background

Sulfur hexafluoride of the formula SF₆The arc extinguishing gas is colorless and tasteless inert gas, and has good electric insulation performance and excellent arc extinguishing performance. The electric strength of the material is 2.5 times of that of nitrogen under the same pressure, the breakdown voltage is 2.5 times of that of air, and the arc extinguishing capability is 100 times of that of air, so that the material is a new generation of ultrahigh-voltage insulating dielectric material superior to that between air and oil.

Therefore, the sulfur hexafluoride gas is widely applied to electrical equipment and plays roles in insulation and arc extinction; sulfur hexafluoride gas is mainly used in sulfur hexafluoride circuit breakers and GIS (sulfur hexafluoride-sealed combined electrical appliances), sulfur hexafluoride load switchgear, sulfur hexafluoride insulated transmission lines, sulfur hexafluoride transformers, and sulfur hexafluoride insulated substations.

After the gas detection of sulfur hexafluoride equipment is carried out in the current transformer substation, leakage detection is needed to prevent the check valve from being reset. The existing leak detector often causes false alarm due to field wind speed problem or does not find air leakage problem due to the fact that detection is not covered.

Although sulfur hexafluoride gas has many advantages and is widely used in electrical equipment, it has many disadvantages. The sulfur hexafluoride gas contains a small amount of water vapor in a high-temperature high-pressure gas chamber, and is decomposed when encountering electric arc or abnormal partial discharge generated by normal operation of equipment, and decomposition products (HF and SO) of the sulfur hexafluoride gas₂、SOF₂、SOF₄、SO₂F₄Etc.) which can corrode the metal components inside the equipment, thereby causing the equipment to malfunction. From the medical point of view, various decomposition products and products of sulfur hexafluoride are harmful to human bodies, and the influence degree depends on the toxicity of the sulfur hexafluoride, the sulfur hexafluoride also depends on the amount of the sulfur hexafluoride inhaled into the human bodies and the physical quality of each person, so that the sulfur hexafluoride leakage detection is very necessary.

Sulfur hexafluoride gas is currently incorporated into system management in the power industry. When the quality of the sulfur hexafluoride gas in the electrical equipment does not meet the use requirement of the equipment, the sulfur hexafluoride gas needs to be recycled and reprocessed by professional personnel, so that the sulfur hexafluoride gas becomes qualified sulfur hexafluoride gas and is reused. Therefore, the cost of gas use is saved to a great extent, and meanwhile, the damage to human bodies, environment, equipment and the like is avoided.

The gas leak detector used at present often causes inaccurate test due to the problems of external wind speed and the like because of being exposed in the air for detection, and meanwhile, the gas leakage field can not be found in time because the test point can not completely cover the inflating port of the equipment in open detection.

Disclosure of Invention

The invention aims to solve the technical problem of providing a portable gas leakage detection device which adopts a sealed bubble method for detection, is more intuitive and efficient than the traditional method and has no misdiagnosis problem.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

as an embodiment of the present invention, a method of making,

a portable gas leakage detection device comprises an airflow channel, a connecting port fixedly connected to the front end of the airflow channel, a foam concentrate storage chamber fixedly communicated with the side part of the airflow channel and a nozzle fixedly connected to the rear end of the airflow channel;

the connecting port is used for being connected with an inflation port of sulfur hexafluoride equipment in a sealing mode, the foam liquid storage chamber is used for storing foam liquid, and the nozzle is used for observing the emission of bubbles.

As a further improvement of the present embodiment,

the inner side of the connecting port is provided with inner connecting threads, and the inner connecting threads are matched with the outer threads of the inflating port of the sulfur hexafluoride equipment.

As a further improvement of the present embodiment,

the inner diameter of the connecting port is larger than that of the airflow channel, an annular platform is formed by the connecting port and the front end of the airflow channel, and a sealing gasket attached to the annular platform is padded in the connecting port.

As another embodiment of the present invention, a method of manufacturing a semiconductor device,

the air flow channel is fixedly connected with the air inlet of the air conditioner, and the air flow channel is fixedly connected with the air inlet of the air conditioner;

the button switch controls the blocking partition plate to make and break the flow of the airflow in the airflow channel.

As a further improvement of the present embodiment,

the barrier baffle is located to the left of the foam concentrate storage chamber.

Further, in both of the above embodiments,

the foam liquid storage chambers are all made of soft plastic materials.

As another embodiment of the present invention, a method of manufacturing a semiconductor device,

the foam liquid storage chamber is made of metal materials and is communicated with an inflatable bag through a pressurizing air pipe.

As a further improvement of the present embodiment,

and a non-return assembly covering the upper port of the foam liquid storage chamber is arranged in the air flow channel.

As a further improvement of the present embodiment,

the non-return assembly comprises a water permeable pore plate and a water blocking blind plate fixed on the water permeable pore plate through a fixing screw;

the water blocking blind plate is positioned above the water permeable pore plate, and a gap is reserved between the lower surface of the water blocking blind plate and the upper surface of the water permeable pore plate.

As a further improvement of the present embodiment,

a fixing and mounting hole for mounting a fixing screw is formed in the center of the water-permeable pore plate;

and the water-permeable pore plate is provided with a through hole for a foam liquid flow inlet flow channel of the foam liquid storage chamber.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the invention has the functions of standard interface, foam liquid storage and external observation;

the standard interface function is adopted, the leak detection device is in sealing butt joint with the inflation inlet of the sulfur hexafluoride equipment through the standard interface, and the sealing performance of sealing connection is improved quickly and conveniently in connection;

the function of storing the foam liquid can store the foam liquid in the leakage detection device, the foam liquid does not need to be independently configured, and the operation of detecting gas leakage is convenient to carry out in time;

the external observation function can blow air bubbles through the small holes, so that observation and judgment are facilitated, and operators can observe air leakage more intuitively;

the device can greatly improve the leakage detection efficiency of the inflation inlet of the sulfur hexafluoride equipment, the leakage detection result is more reliable, the device is low in cost, and the general applicability is strong.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic external structural view of the first embodiment;

FIG. 2 is a schematic view of the internal structure of the first embodiment;

FIG. 3 is a schematic external structural view of the second embodiment;

FIG. 4 is a schematic view showing the internal structure of the second embodiment;

FIG. 5 is a schematic view showing the external structure of the third embodiment;

FIG. 6 is a schematic view showing the internal structure of the third embodiment;

FIG. 7 is a schematic structural view of a check assembly according to a third embodiment;

fig. 8 is a schematic structural view of a water-permeable pore plate according to the third embodiment.

In the first embodiment

1 connecting port, 11 internal connecting threads, 12 sealing washers,

2 a foam concentrate storage chamber, 4 nozzles and 5 airflow channels;

in the second embodiment

1 connecting port, 11 internal connecting threads, 12 sealing washers,

2 foam liquid storage chamber, 3 button switch,

31 blocking partition plates, 4 nozzles and 5 airflow channels;

in the third embodiment

1 connecting port, 11 internal connecting threads, 12 sealing washers,

2 foam concentrate storage chamber, 3 push button switch, 31 blocking partition,

4 nozzles, 5 airflow channels, 6 check components,

7 a pressurized air pipe, 8 an inflatable bag,

61 water permeable pore plates, 62 water blocking blind plates, 63 fixing screws,

The mounting holes are fixed by 64 through holes and 65.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting.

Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Gas leakage reason of GIS equipment

GIS has complex process, a large number of interfaces and a large number of sealing points, so compared with other sulfur hexafluoride gas charging equipment, the gas leakage reason is more difficult to determine, and the reason of 3 points is summarized.

a. Designing construction defects:

when the device is installed on site, the local stress of the device exceeds the design capacity because the constructor does not butt according to the required size; insufficient corrugated pipes and overlong bus bins cause that GIS equipment lacks enough adjusting distance; unreasonable design of the balance of the apparatus causes a dimensional shift in the movement.

b. Manufacturing and mounting defects:

the cast, the flange and the basin-type insulator have cracks, sand holes and the like because the production design of manufacturers or the field installation does not accord with the flow standard; the design of the sealing ring of the equipment does not conform to the size; the water resistance does not reach the national relevant standard; the sealing and mounting treatment after the repair and the disassembly is not up to the standard.

c. The defects of natural environment:

the O-shaped ring is wetted when water enters; the air leakage is caused by the aging of the sealant and the sealing element; the expansion with heat and contraction with cold cause the deformation of the equipment; vibration in the operation of GIS equipment causes damage to the equipment.

Gas leakage hazard of GIS equipment

At normal temperature, the sulfur hexafluoride is an inert gas, has the characteristics of no color, no smell, no toxicity, difficult combustion and the like, has high decomposition temperature (about 500 ℃ and about 200 ℃ compared with the water decomposition temperature), high density (about 5 times of air) and strong insulating capability (about 2.5 times of air), and is an excellent electric insulating medium. In the GIS equipment, sulfur hexafluoride gas leakage mainly causes the following problems.

a. When abnormal heating, Partial Discharge (PD) and other phenomena occur in the GIS equipment, the sulfur hexafluoride is decomposed into low fluoride and free fluorine, and when pure sulfur hexafluoride is present in the environment, these decomposed substances are rapidly reduced into sulfur hexafluoride through recombination with the temperature reduction, but since the GIS equipment also contains trace amounts of air, water, oil and other components, the decomposed substances are converted into strong acid stable gases such as SO2, SOF2, H2S, HF, SO2F2, SOF4, S2F10, and these gases can corrode metal parts and sealing insulating materials in the equipment, SO that the insulating ability of the GIS equipment is reduced, and the service life of the GIS equipment is affected. Toxic gas generated in GIS equipment can also affect the health of operation maintainers.

b. As a main arc extinguishing and insulating medium in GIS equipment, the performance of sulfur hexafluoride is closely related to the pressure thereof. Research shows that when the pressure is 0.3MPa, the insulating property of the insulating oil is equal to that of the traditional insulating oil. Therefore, gas leakage from GIS equipment can degrade its electrical performance.

c. According to the Kyoto protocol and Paris protocol, the greenhouse effect of sulfur hexafluoride gas is about 23900 times that of CO2, and its leakage has a serious influence on the atmospheric environment.

d. At present, aiming at the gas leakage phenomenon of GIS equipment, in order to ensure the normal operation of the GIS equipment, sulfur hexafluoride gas is required to be supplemented in time when the gas leakage occurs, and the filled sulfur hexafluoride gas has trace water, so that the water content in the GIS is further increased, and the service life of the equipment is reduced.

e. The price of sulfur hexafluoride is relatively high, and sulfur hexafluoride equipment is widely applied to an electric power system, and is not beneficial to economic operation of the electric power system if frequent replenishment is carried out.

Although the pure sulfur hexafluoride gas is nontoxic, the concentration of the sulfur hexafluoride gas is prevented from rising to an oxygen-deficient level in a working field. The density of sulfur hexafluoride gas is about five times that of air, and sulfur hexafluoride gas will be deposited in low places, such as cable trenches, if it leaks. Excessive concentrations present a choking hazard and are considered in the design of indoor ventilation units. Decomposition products of sulfur hexafluoride such as SF under the action of electric arc₄，S₂F₂，SF₂，SOF₂，SO₂F₂，SOF₄And HF, etc., which are both highly corrosive and toxic. Therefore, in power systems GIS and the likeIn a workplace using sulfur hexafluoride, sulfur hexafluoride gas leakage monitoring equipment needs to be additionally arranged, and the main methods for monitoring the sulfur hexafluoride gas include four methods:

1) electrochemical technique, Felgaro sensor or halogen gas sensor

The principle of the electrochemical technology is that the detected gas contacts the surface of a catalyst with high temperature of about 200 ℃ and reacts with the catalyst to generate a corresponding chemical reaction, so that the change of an electric signal is generated, and the detected gas is found. The electrochemical technology has the characteristics of low cost, long service life, simple structure and continuous work.

2) High voltage breakdown technique

The electrical breakdown technology evolved from the typical use of sulfur hexafluoride in electricity, as an insulating gas in a GIS switchgear. The working principle is that whether the air contains sulfur hexafluoride gas or not is judged according to the insulating characteristic of the sulfur hexafluoride gas from the voltage change between high-voltage electrodes arranged in the detected air. The device has the characteristics of relatively simple structure, low cost and relatively high detection precision.

3) Infrared spectroscopy

The principle of infrared spectrum absorption technology (also called laser technology) is that sulfur hexafluoride is used as greenhouse gas, and has strong absorption characteristic to infrared light of specific wave band. The infrared spectrum technology has the characteristics of high cost, complex structure, high sensitivity, no influence and interference of the environment, and small detection error caused by the change of the temperature and the humidity of the environment. Meanwhile, the system structure brings great convenience to wiring in engineering implementation.

4) ECD principle of electron capture

Electron capture detectors, abbreviated as ECDs. The electron capture detector is also an ionization detector, which is a selective high-sensitivity detector that has a signal only for substances having electronegativity, such as halogen, sulfur, phosphorus, and nitrogen-containing substances, the more electronegativity of the substances, i.e., the larger the electron absorption coefficient, the higher the sensitivity of the detector, and no signal for electrically neutral (non-electronegativity) substances, such as alkanes and the like.

The four detection methods need special electronic instruments, are inconvenient to carry, have a plurality of detection devices, are easy to leak due to poor sealing because the inflation inlet of the sulfur hexafluoride device is the inflation inlet of sulfur hexafluoride gas, and are not suitable for the inflation inlet of the sulfur hexafluoride device which needs to be detected at any time in conventional gas leakage detection.