CN112180033A - Gas mixing device and gas mixing method - Google Patents
Gas mixing device and gas mixing method Download PDFInfo
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- CN112180033A CN112180033A CN201910599080.XA CN201910599080A CN112180033A CN 112180033 A CN112180033 A CN 112180033A CN 201910599080 A CN201910599080 A CN 201910599080A CN 112180033 A CN112180033 A CN 112180033A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 40
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- 230000003213 activating effect Effects 0.000 claims description 3
- 210000003437 trachea Anatomy 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 307
- 238000005086 pumping Methods 0.000 description 10
- 238000000605 extraction Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
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- 230000000750 progressive effect Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/004—CO or CO2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0047—Organic compounds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
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Abstract
The invention discloses a gas mixing device and a gas mixing method, wherein the gas mixing device comprises: the air guide pipe is used for connecting an air outlet and an air inlet of the switch equipment air chamber structure, the switch equipment air chamber structure is provided with a plurality of air ports, and the plurality of air ports comprise the air outlet and the air inlet; the pump is arranged on the air guide pipe and is used for driving the gas in the air guide pipe to flow to the air outlet end of the air guide pipe along the air inlet end of the air guide pipe, the air inlet end of the air guide pipe is a connecting end for connecting the air guide pipe with the air outlet, and the air outlet end of the air guide pipe is a connecting end for connecting the air guide pipe with the air inlet; the connector group is arranged on the air duct and used for inflating and exhausting the air chamber structure of the switch equipment through the air duct; and the gas component sensor is arranged on the gas guide tube and is used for detecting each gas component of the mixed gas in the gas guide tube. The gas mixing device provided by the invention effectively ensures the mixing effect.
Description
Technical Field
The invention relates to the technical field of switchgear, in particular to a gas mixing device and a gas mixing method.
Background
Environmentally friendly gases as SF for wide adoption in switchgear6Have received increasing attention in recent years. Most of the environmental protection gas is the mixture of basic gas and common gas, the basic gas is generally macromolecular substance, and the common gas is micromolecular substance. Since the mixed gas is only filled into the switchgear after the switchgear is installed in place, and the volume of the equipment gas chamber is large, a delamination phenomenon may occur. The invention provides a device and a method for quickly mixing gas in a closed space, which can realize the quick and uniform mixing of the mixed gas in a gas chamber of a switch device.
SF6As an excellent insulating and arc-extinguishing medium, it is widely used in switchgear. However, SF was required according to the protocol of Beijing protocol 1997 and Paris protocol 20166Has global warming potential of CO223900 times higher, as a strong greenhouse gas, its use must be gradually cut down. Environmental gases have received increasing attention in recent years.
The environment-friendly gas is a mixture of a base gas and a buffer gas, wherein the base gas is C4F7N、C5F10O, and the buffer gas contains N2、CO2And the like. Because the mixed gas is filled after the switch device is installed in placeThe volume of an equipment gas chamber is large, the diffusion process of large gas in small molecule gas is greatly influenced by gravity, and the time required for forming a stable mixed state is long. When the base gas is filled first and the buffer gas is refilled, the layering phenomenon occurs, so that the insulation strength of equipment cannot meet the design requirement after the mixed gas is filled, the density relay display also has deviation, and the safe and stable operation of a power grid can be endangered when the switch equipment is put into operation. Meanwhile, if a premixing device is adopted when the high-voltage switch equipment is filled with the mixed gas, the cost is high, the operation is complex, the time consumption of the filling process is long, and the state of the premixed gas after entering the gas chamber cannot be controlled. How to reduce the inflation cost, accelerate the gas mixing process, ensure that the gas in the equipment air chamber is uniformly mixed, and become the problem which needs to be solved urgently for developing environment-friendly switch equipment.
Disclosure of Invention
In view of the above, the present invention provides a gas mixing device to ensure uniform gas mixing. The invention also provides a gas mixing method.
In order to achieve the purpose, the invention provides the following technical scheme:
a gas mixing device, comprising:
the air guide pipe is used for connecting an air outlet and an air inlet of a switchgear air chamber structure, the switchgear air chamber structure is provided with a plurality of air ports, and the plurality of air ports comprise the air outlet and the air inlet;
the pump is arranged on the air guide tube and used for driving the gas in the air guide tube to flow to the air outlet end of the air guide tube along the air inlet end of the air guide tube, the air inlet end of the air guide tube is a connecting end of the air guide tube connected with the air outlet, and the air outlet end of the air guide tube is a connecting end of the air guide tube connected with the air inlet;
the connector group is arranged on the air duct and used for inflating and exhausting the switch equipment air chamber structure through the air duct;
and the gas component sensor is arranged on the gas guide tube and is used for detecting each gas component of the mixed gas in the gas guide tube.
Preferably, the gas mixing device further comprises a branched gas-guide tube communicated with the gas-guide tube, and both ends of the branched gas-guide tube are connected with the gas-guide tube;
the gas component sensor is arranged on the branched gas-guide tube.
Preferably, the gas mixing device further comprises a display unit, which is in communication connection with the gas component sensor and is used for displaying the detection result;
and/or the gas component sensor is a gas component and humidity sensor capable of detecting gas component and humidity information.
Preferably, the gas mixing device further includes a gas heating unit for heating the mixed gas;
the gas heating unit is arranged on the gas guide pipe and is used for heating the mixed gas in the gas guide pipe; or the gas heating unit is a heating unit which is arranged on the outer wall of the switchgear gas chamber structure and is used for heating the mixed gas in the switchgear gas chamber structure.
Preferably, the gas mixing device further comprises a data processing and executing unit, and the data processing and executing unit is in communication connection with the gas component sensor and the pump;
when the data processing and executing unit judges that the actual data reaches a set threshold value, the gas component sensor and the pump are controlled to be closed;
the actual data includes component data of each detected gas component detected by the gas component sensor and/or a cycle time of the pump.
Preferably, the gas mixing device further comprises a gas heating unit arranged on the gas guide tube, and the gas heating unit heats the gas in the gas guide tube;
the data processing and executing unit is in communication connection with the gas heating unit; and when the data processing and executing unit judges that the actual data reaches the set threshold value, controlling the gas heating unit to be closed.
Preferably, in the gas mixing apparatus, the joint set includes a plurality of joints.
Preferably, in the above gas mixing device, the switchgear gas chamber structure is a single switchgear gas chamber, and the gas outlet and the gas inlet are gas ports provided on the switchgear gas chamber;
or, the gas-chamber structure of the switch equipment is a gas-chamber group consisting of a plurality of switch equipment gas chambers connected in series through the connecting gas pipe, and the gas outlet and the gas inlet are respectively a head gas port and a tail gas port of the switch equipment gas-chamber structure; the first air port is an air port which is not connected with the connecting air pipe on the first switch equipment air chamber in the switch equipment air chamber structure, and the tail air port is an air port which is not connected with the connecting air pipe on the last switch equipment air chamber in the switch equipment air chamber structure.
The invention also provides a gas mixing method, which applies the gas mixing device as any one of the above, and comprises the following steps:
connecting the gas mixing device with the switch equipment gas chamber structure to enable the gas ports to be in a communicated state, and vacuumizing the switch equipment gas chamber structure by adopting vacuumizing equipment through the joint group;
the gas chamber structure of the switch equipment is inflated through the joint group, and the types of the inflated gas are at least two;
starting the pump to circulate gas between the gas duct and the switchgear plenum structure;
detecting each gas component in the mixed gas through the gas component sensor;
and when the component data of each detected gas component detected by the gas component sensor reaches a set threshold value, closing the gas component sensor and the pump.
Preferably, in the gas mixing method, the step of activating the pump sets a cycle time of the pump.
According to the technical scheme, the gas mixing device provided by the invention can be communicated with the gas outlets and the gas inlets in the plurality of gas ports of the air chamber structure of the switch equipment, and the joint group can be communicated with external air pumping equipment or air charging equipment so as to realize the air pumping and air charging operation of the air chamber structure of the switch equipment; the operation of the pump drives the gas in the gas chamber structure of the switch device to circularly flow along the gas guide pipe, thereby playing the role of promoting the gas mixing; the gas component sensor detects each gas component of the mixed gas in the gas guide tube, so that the detection of each gas component of the mixed gas in the gas chamber structure of the switch equipment is realized, and whether the mixed gas in the gas chamber structure of the switch equipment is uniformly mixed or not is judged by detecting each gas component. The gas mixing device provided by the embodiment of the invention can realize the circular flow of gas in the gas chamber structure and the gas guide tube of the switch equipment, and the gas component sensors are used for detecting each gas component of the mixed gas to obtain the mixing condition of the gas, thereby effectively ensuring the mixing effect.
The invention also provides a gas mixing method, which has the same technical effects as the gas mixing device and is not described in detail herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a gas mixing device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a gas mixing method according to an embodiment of the present invention.
Detailed Description
The invention discloses a gas mixing device, which is used for ensuring uniform gas mixing. The invention also provides a gas mixing method.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Referring to fig. 1, an embodiment of the present invention provides a gas mixing device, including a gas guiding tube 6, a pump 8, a connector set 5, and a gas component sensor 9, where the gas guiding tube 6 is used to connect a gas outlet 2 and a gas inlet 13 of a switchgear gas chamber structure, the switchgear gas chamber structure has a plurality of gas ports, and the plurality of gas ports includes the gas outlet 2 and the gas inlet 13; the pump 8, the connector group 5 and the gas component sensor 9 are all arranged on the gas guide tube 6. The pump 8 is used for driving the gas in the gas guide tube 6 to flow to the gas outlet end of the gas guide tube 6 along the gas inlet end of the gas guide tube 6, the gas inlet end of the gas guide tube 6 is a connecting end for connecting the gas guide tube 6 with the gas outlet 2, and the gas outlet end of the gas guide tube 6 is a connecting end for connecting the gas guide tube 6 with the gas inlet 13; the connector group 5 is used for inflating and exhausting air to the air chamber structure of the switch device through the air duct 6; the gas component sensor 9 is used for detecting each gas component of the mixed gas in the gas guide tube 6.
The gas mixing device provided by the embodiment of the invention can be communicated with the gas outlets 2 and the gas inlets 13 in a plurality of gas ports of a switch equipment gas chamber structure, and the connector group 5 can be communicated with external air pumping equipment or air charging equipment so as to realize the operations of air pumping and air charging of the switch equipment gas chamber structure; the operation of the pump 8 drives the gas in the gas chamber structure of the switch device to circularly flow along the gas guide pipe 6, thereby playing the role of promoting the gas mixing; the gas component sensor 9 detects each gas component of the mixed gas in the gas guide tube 6, namely, the detection of each gas component of the mixed gas in the air chamber structure of the switch equipment is realized, and whether the mixed gas in the air chamber structure of the switch equipment is uniformly mixed or not is judged by detecting each gas component. The gas mixing device provided by the embodiment of the invention can realize the circular flow of gas in the gas chamber structure of the switch equipment and the gas guide pipe 6, and the gas component sensor 9 is used for detecting each gas component of the mixed gas to obtain the mixing condition of the gas, thereby effectively ensuring the mixing effect.
In this embodiment, the gas mixing device further comprises a branched gas-guide tube 10 communicated with the gas-guide tube 6, and both ends of the branched gas-guide tube 10 are connected with the gas-guide tube 6; the gas component sensor 9 is disposed on the branched gas duct 10. The gas component sensor 9 is connected with the conductor tube 6 in parallel through the branched gas-guide tube 10, and the branched gas-guide tube 10 has a branching function, so that the gas component sensor 9 can conveniently measure the components, and the rapid circulation of the gas in the conductor tube 6 can not be influenced.
Preferably, the gas composition sensor 9 is a gas composition and humidity sensor capable of detecting gas composition and humidity information. Through the dual detection to component and humidity to detect according to different demands, satisfy the operation of different detection types.
The gas mixing device provided by the embodiment of the invention further comprises a display unit in communication connection with the gas component sensor 9, and the display unit is used for displaying the detection result. Wherein, the detection result can comprise any of gas component information, humidity information and temperature information.
The display unit may be integrated with the gas composition sensor 9 or may be separately disposed, which is not described in detail and is within the protection scope.
In order to increase the temperature of the mixed gas, so as to increase the molecular kinetic energy and enhance the diffusion process, the gas mixing device in this embodiment further includes a gas heating unit 7 for heating the mixed gas.
As shown in fig. 1, in the present embodiment, the gas heating unit 7 may be a heating unit that is disposed on the gas guiding tube 6 and heats the mixed gas in the gas guiding tube 6. The gas heating unit 7 may be a heat exchanger, an electric heating module, or the like.
In another embodiment, the gas heating unit 7 is a heating unit for being arranged on an outer wall of the switchgear gas chamber structure and heating the mixed gas inside the switchgear gas chamber structure. The gas heating unit 7 may be a heating member attached to the outer wall of the switchgear air chamber structure, or a hot air device that heats the outer wall of the switchgear air chamber structure.
In order to improve the automation control, the gas mixing device also comprises a data processing and executing unit 11, and the data processing and executing unit 11 is in communication connection with the gas component sensor 9 and the pump 8; when the data processing and executing unit 11 judges that the actual data reaches the set threshold, the gas component sensor 9 and the pump 8 are controlled to be closed; the actual data includes the composition data of each detected gas composition detected by the gas composition sensor 9 and/or the cycle time of the pump 8. Wherein the actual data preferably comprises the composition data and the cycle time of the pump 8 in order to further ensure the mixing homogeneity. The actual data may be set to be either the group data or the cycle time of the pump 8.
Further, the gas heating device also comprises a gas heating unit 7 arranged on the gas guide tube 6, and the gas heating unit 7 heats the gas in the gas guide tube 6; the data processing and executing unit 11 is in communication connection with the gas heating unit 7; when the data processing and executing unit 11 judges that the actual data reaches the set threshold, the gas heating unit 7 is controlled to be turned off. The automation degree is further improved.
The joint group 5 includes a plurality of joints. The joint group 5 may have two joints, three joints, or more than three joints.
In this embodiment, the connector set 5 includes three connectors, which include a vacuum-pumping connector for vacuum-pumping, a first gas-filling connector for filling a first gas to be mixed, and a second gas-filling connector for filling a second gas to be mixed. By arranging at least three joints, the operation efficiency is improved. The joint group 5 is preferably a self-sealing joint group, that is, the joints thereon are self-sealing joints.
Wherein, the joints of the joint group 5 can perform air suction and inflation operations. When the joints of the joint group 5 are connected with external air extraction equipment and perform air extraction operation, vacuum extraction operation can be performed, namely air in the air chamber 1 of the switch equipment is extracted; a gas recovery operation, i.e. the extraction and recovery of the filling gas (mixture or air) in the switchgear gas cell 1, can also be performed. The connectors in the connector group 5 can be made common. That is, the evacuation fitting is reused with the inflation fitting. The external air pumping equipment is connected with the joint for vacuumizing operation, then the interface of the external air pumping equipment is pulled out from the joint to connect the air charging device with the joint, and the gas waste caused by the fact that the gas charged into the air chamber structure of the switch equipment flows into a pipeline of the external air pumping equipment is prevented.
The switch equipment air chamber can be structured into a single switch equipment air chamber 1, and the air outlet 2 and the air inlet 13 are air ports arranged on the switch equipment air chamber 1;
the switchgear gas chamber structure can also be a gas chamber group formed by connecting a plurality of switchgear gas chambers 1 in series. Namely, the gas mixing device also comprises a connecting gas pipe 14, a plurality of switch equipment gas chambers 1 are connected in series through the connecting gas pipe 14, and a gas outlet 2 and a gas inlet 13 are respectively a first gas port and a tail gas port of the switch equipment gas chamber structure; the first air port is an air port which is not connected with the connecting air pipe 14 on the first switch equipment air chamber 1 in the switch equipment air chamber structure, and the tail air port is an air port which is not connected with the connecting air pipe 14 on the last switch equipment air chamber 1 in the switch equipment air chamber structure.
It can be understood that the valve seat 3, the self-sealing joint 4 and the barometer 12 are arranged on the air port of the air chamber structure of the switch device, so that the connection and the use safety are facilitated.
The embodiment of the invention also provides a gas mixing method, which is applied to any one of the gas mixing devices, and comprises the following steps:
connecting the gas mixing device with the air chamber structure of the switch equipment to enable the gas ports to be in a communicated state, and vacuumizing the air chamber structure of the switch equipment by adopting vacuumizing equipment through a connector group 5;
wherein, the gas-guide tube 6 of the gas mixing device is connected with the gas outlet 2 and the gas inlet 13 of the gas chamber structure of the switch device.
The gas chamber structure of the switch equipment is inflated through the connector group 5, and the types of the inflated gas are at least two;
starting the pump 8 to circulate the gas between the gas duct 6 and the switchgear gas chamber structure;
detecting each gas component in the mixed gas through a gas component sensor 9;
when the composition data of each detected gas composition detected by the gas composition sensor 9 reaches a set threshold value, the gas composition sensor 9 and the pump 8 are turned off.
The gas mixing method provided by the embodiment of the invention has the same technical effects as the gas mixing device, and the description is not repeated.
Further, in the step of activating the pump 8, the cycle time of the pump 8 is set.
In the embodiment shown in FIG. 2 where the environmental gas is introduced into the switchgear plenum structure, the base gas is typically C4F7N、C5F10O, and the buffer gas contains N2、CO2And the like. In this example, the mixed gas comprises 5% C4F7N and 95% CO2The inflation pressure is 0.6MPa (absolute pressure), and the inflation and mixing process is as follows:
s1: preparing; the gas mixing device is connected with a gas chamber structure of the switch device;
the connector group 5, the gas guide tube 6, the gas heating unit 7, the pump 8, the gas component sensor 9, the branch gas guide tube 10 and the data processing and executing unit 11 are assembled, and the gas guide tube 6 of the gas mixing device is connected with the gas outlet 2 and the gas inlet 13 of the gas chamber structure of the switch device.
And opening the valve seat 3 of the air port (the air outlet 2 and the air inlet 13) of the air chamber structure of the switch equipment, so that the air duct 6 and the air chamber structure of the switch equipment are in a communicated state.
S2: vacuumizing through a self-sealing joint group (joint group 5); external vacuum-pumping equipment such as a vacuum pump is adopted, and the interior of the air chamber structure of the switch equipment is vacuumized through the connector group 5;
s3: filling the base gas of the environment-friendly gas;
in this example, C4F7The partial pressure of N was 0.03 MPa. Is firstly filled with C4F7The N to barometric pressure was 0.03MPa (absolute pressure).
S4: filling environment-friendly gas buffer gas;
refilling with CO2Until the pressure gauge is 0.6MPa (absolute pressure).
For safety reasons, after the inflation is complete, the valve seat 3 is closed, the evacuation device is removed and the valve seat 3 is opened.
Wherein, a setting threshold in the data processing and executing unit 11 can be set, wherein the setting threshold includes: c4F7The threshold value of the N component is 5% +/-0.5%, and the circulation time of the pump 8 is 30 minutes;
s5: starting the gas heating unit 7, the gas component sensor 9 and the display unit;
s6: starting the pump 8 to circulate the gas between the gas duct 6 and the switchgear gas chamber structure;
s7: judging whether the gas components and the cycle time reach set thresholds or not; when the actual data does not reach the set threshold, the process proceeds to step S6; when the actual data reaches a set threshold value, entering the next step;
s8: the gas heating unit 7, the gas composition sensor 9, the display unit and the pump 8 are switched off automatically or manually. In this embodiment, the data processing and execution unit 11 automatically turns off the gas heating unit 7, the gas component sensor 9, the pump 8 and the display unit after the gas component and the cycle time reach the set threshold.
S9: finishing; the valve seat 3 is closed and the gas mixing device is removed.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A gas mixing apparatus, comprising:
the air guide pipe (6) is used for connecting an air outlet (2) and an air inlet (13) of a switchgear air chamber structure, the switchgear air chamber structure is provided with a plurality of air ports, and the plurality of air ports comprise the air outlet (2) and the air inlet (13);
the pump (8) is arranged on the air guide pipe (6), the pump (8) is used for driving the gas in the air guide pipe (6) to flow to the air outlet end of the air guide pipe (6) along the air inlet end of the air guide pipe, the air inlet end of the air guide pipe (6) is the connecting end of the air guide pipe (6) and the air outlet (2), and the air outlet end of the air guide pipe (6) is the connecting end of the air guide pipe (6) and the air inlet (13);
the connector group (5) is arranged on the air duct (6), and the connector group (5) is used for inflating and exhausting the air chamber structure of the switch equipment through the air duct (6);
and the gas component sensor (9) is arranged on the gas guide pipe (6), and the gas component sensor (9) is used for detecting each gas component of the mixed gas in the gas guide pipe (6).
2. The gas mixing device according to claim 1, further comprising a divergent gas duct (10) communicating with the gas duct (6), both ends of the divergent gas duct (10) being connected to the gas duct (6);
the gas component sensor (9) is arranged on the branched gas-guide tube (10).
3. The gas mixing device according to claim 1, further comprising a display unit in communication with the gas component sensor (9) for displaying the detection result;
and/or the gas component sensor (9) is a gas component and humidity sensor capable of detecting gas component and humidity information.
4. The gas mixing device according to claim 1, further comprising a gas heating unit (7) for heating the mixed gas;
the gas heating unit (7) is arranged on the gas guide pipe (6) and is used for heating the mixed gas in the gas guide pipe (6); or the gas heating unit (7) is arranged on the outer wall of the switchgear gas chamber structure and used for heating the mixed gas in the switchgear gas chamber structure.
5. The gas mixing device according to claim 1, further comprising a data processing and execution unit (11), said data processing and execution unit (11) being communicatively connected to said gas composition sensor (9) and said pump (8);
when the data processing and executing unit (11) judges that the actual data reaches a set threshold value, the gas component sensor (9) and the pump (8) are controlled to be closed;
the actual data includes component data of each detected gas component detected by the gas component sensor (9) and/or a cycle time of the pump (8).
6. The gas mixing device according to claim 5, further comprising a gas heating unit (7) disposed on the gas-guide tube (6), wherein the gas heating unit (7) heats the gas in the gas-guide tube (6);
the data processing and executing unit (11) is in communication connection with the gas heating unit (7); and when the data processing and executing unit (11) judges that the actual data reaches the set threshold value, controlling the gas heating unit (7) to be closed.
7. The gas mixing device according to claim 1, characterized in that the set of joints (5) comprises a plurality of joints.
8. A gas mixing arrangement as claimed in any one of claims 1 to 7, characterised in that the switchgear cell configuration is a single switchgear cell (1), the gas outlet (2) and the gas inlet (13) being gas ports provided on the switchgear cell (1);
or the gas-phase converter further comprises a connecting gas pipe (14), the switch equipment gas chamber structure is a gas chamber group consisting of a plurality of switch equipment gas chambers (1) which are connected in series through the connecting gas pipe (14), and the gas outlet (2) and the gas inlet (13) are respectively a head gas port and a tail gas port of the switch equipment gas chamber structure; the first air port is the air port that first in the switchgear air chamber structure on the switchgear air chamber (1) not with connect trachea (14) and connect, the tail gas port is last in the switchgear air chamber structure on the switchgear air chamber (1) not with connect the trachea (14) and connect the air port of being connected.
9. A gas mixing method using the gas mixing apparatus according to any one of claims 1 to 8, comprising:
connecting the gas mixing device with the switch equipment gas chamber structure to enable the gas ports to be in a communicated state, and vacuumizing the switch equipment gas chamber structure by adopting vacuumizing equipment through the connector group (5);
the gas chamber structure of the switch equipment is inflated through the connector group (5), and the types of the inflated gas are at least two;
-activating the pump (8) so that gas circulates between the gas duct (6) and the switchgear air chamber structure;
detecting each gas component in the mixed gas through the gas component sensor (9);
and when the component data of each detected gas component detected by the gas component sensor (9) reaches a set threshold value, the gas component sensor (9) and the pump (8) are closed.
10. The gas mixing method according to claim 9, wherein in the step of activating the pump (8), a cycle time of the pump (8) is set.
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