CN207380209U - Portable density table contact tester - Google Patents
Portable density table contact tester Download PDFInfo
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- CN207380209U CN207380209U CN201721387864.9U CN201721387864U CN207380209U CN 207380209 U CN207380209 U CN 207380209U CN 201721387864 U CN201721387864 U CN 201721387864U CN 207380209 U CN207380209 U CN 207380209U
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- crossover sub
- solenoid valve
- gas
- contact
- relay
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Abstract
Portable density table contact tester, including tester host (1), the push-button switch SB being arranged on host housing, two test wire slots, rechargeable battery charge port, micro buzzer-phone HA, light emitting diode VD, first solenoid valve crossover sub (5) and second solenoid valve crossover sub (6), the relay KEM being arranged in host housing, miniature electromagnetic valve DT, rechargeable battery DC, the first PU tracheaes (7) and the non-return valve crossover sub (2) of tracheae end being connected on the first solenoid valve crossover sub, the 2nd PU tracheaes (8) and the gas cylinder crossover sub (3) of tracheae end being connected on second solenoid valve crossover sub, the small-sized SF6 gas cylinders (4) to connect with gas cylinder crossover sub (3), two pluggable test wires (9) with crocodile clip in test wire slot.The utility model can accurately measure SF6 density meter lifting/voltage reducing working values, and realize the recycling of SF6 gases and carry out accurate tonifying Qi to SF6 insulation electrical equipments.
Description
Technical field
The utility model belongs to density meter contact calibration equipment technical field.
Background technology
SF6 density meters are protection important in electric system and control element, are responsible for the gas of monitoring SF6 insulation electrical equipments
Body pressure and signal to the electrical equipment of pressure value exception alarm or locking electrical equipment.The verification of SF6 density meter contacts,
Various pressure during electric equipment operation are exactly simulated, to observe the contact situation of contact, can signal report in specified value
Alert or locking electrical equipment, to judge the quality of SF6 density meters.So seem especially important to the verification of SF6 density meters.
SF6 density meters are required to be verified in a pre-installation afterwards, and the verification project before installation is the indicating value and mark of density meter
The error of quasi- value, alarm/locking contact are converted to operating pressure value after 20 ° etc.；Verification project after installation is SF6 after installation
Whether the sealing performance of density meter is good, whether there is the operating pressure value of gas permeation, alarm/locking contact in environment temperature
Deng.
Wherein, operating pressure value of the alarm/locking contact in environment temperature is to examine after verifying the installation of SF6 density meters
SF6 density meters are protected in electric system and the important evidence of control ability, one is verification SF6 density meters contact is after mounting
Whether contact well, the second is whether detection SF6 density meter contacts can be operating normally in access device after gas pressure, thirdly
It is to examine whether SF6 density meters lifting/voltage reducing working value after excess temperature and atmospheric pressure compensation meets product technology regulation.
Traditional SF6 density meters are alarmed/are latched lifting/voltage reducing working value of the contact in environment temperature, below generally use
Two methods：
1st, the air valve being connected in density meter threeway with electrical equipment is closed, the indoor gas simulation of gas is set in itself with density meter
Standby internal gas pressure, the contact to be examined of secondary connection signal lamp connection.With the open-top density meter non-return valve of the hard object such as screwdriver
Thimble is deflated, and observes and screwdriver is unclamped while signal lamp lights, and reads the pressure reading of density meter, judges the decompression
Whether working value meets technical stipulation.
2nd, the air valve being connected in density meter threeway with electrical equipment is closed, the indoor gas simulation of gas is set in itself with density meter
Standby internal gas pressure, the contact to be examined of secondary connection signal lamp connection.With the transit joint of microwater device/density meter tester
It is docked with non-return valve, the rotation open-top check valve lift pin of transit joint is deflated, and observes negative direction while signal lamp lights
It rotates transit joint and closes non-return valve, read the pressure reading of density meter, judge whether the decompression working value meets technical stipulation.
The drawbacks of both approaches is：With the open-top check valve lift pin of hard object, easily check valve lift pin is caused to damage, be destroyed
The sealing performance of SF6 density meters；With the open-top check valve lift pin of transit joint, cannot be closed moment after observing that signal lamp lights
Non-return valve, the operating pressure value of reading will be less than actual act value.It is different with contact action that there is both of which human hand to act
Step, eye-observation have the collimation error, discharge quantity it is uncontrollable, because smaller deflate of tolerance too fast causes error to put in density meter gas chamber
The shortcomings of big.Meanwhile this method can only verify decompression working value, it is impossible to verify boost action value, and the SF6 gases released can not
Recycling has potential pollution environment, the risk for damaging health.For this reason, it may be necessary to a kind of workpiece original point easy to use these
Drawback promotes measuring accuracy, improves content of the test.
The content of the invention
The purpose of this utility model is to solve the problems, such as existing in the prior art, is provided a kind of accurate, light, easy-to-use, environmentally friendly
Density meter contact calibration equipment, accomplish that result of the test is consistent with actual value.
The purpose of this utility model is achieved through the following technical solutions：
Portable density table contact tester, including tester host, be arranged at push-button switch SB on host housing,
Two test wire slots, rechargeable battery charge port, micro buzzer-phone HA, light emitting diode VD, the first solenoid valve crossover sub and
Second solenoid valve crossover sub, relay KEM, miniature electromagnetic valve DT, the rechargeable battery DC being arranged in host housing, is connected to
The non-return valve crossover sub of the first PU tracheaes and tracheae end on first solenoid valve crossover sub is connected to second solenoid valve and turns
The gas cylinder crossover sub of the 2nd PU tracheaes and tracheae end on changing-over head, the small-sized SF6 gas cylinders to connect with gas cylinder crossover sub,
Two pluggable test wires with crocodile clip in test wire slot；First solenoid valve crossover sub and second solenoid valve conversion
Connector is installed on miniature electromagnetic valve DT；
The tester host is included by push-button switch SB, relay normally closed contact K1, miniature electromagnetic valve DT connection groups
Into air valve control circuit；The alarm signal being made of relay normally open contact K2, micro buzzer-phone HA, light emitting diode VD connections
Number circuit；By two test wire slots of relay coil contact K connections, further through two examinations with crocodile clip being inserted on slot
Test the switch triggering circuit that line is connected composition with SF6 density meter contacts KD；Rechargeable battery DC is connected offer electricity with each circuit
Source；The relay KEM is electromagnetic relay, equipped with one group of normally closed contact K1, one group of normal opened contact K2, one group of coil contact K.
Small-sized SF6 gas cylinders described in the utility model are connected by gas cylinder check valve with gas cylinder crossover sub.The small-sized SF6
Gas cylinder internal be low pressure either vacuum or for higher than equipment air pressure inside high pressure.
The utility model using solenoid valve and electromagnetic relay characteristic, in addition other electric elements formed it is a kind of it is simple easily
With and can accurately measure the device of SF6 density meter lifting/voltage reducing working values.Solenoid valve conduction is controlled using air valve control circuit；Profit
Signal control relay coil motion is sent with switch triggering circuit Midst density table contact, beats air valve control circuit normally closed contact
It opens, air valve is closed, while is closed the normal opened contact of circuit, and buzzer and light emitting diode send alarm signal.
The utility model utilizes own characteristic and principle of differential pressure simultaneously, by way of external low pressure/vacuum SF6 gas cylinders,
Realize the recycling of discharge SF6 gases；By way of external high pressure SF6 gas cylinders, SF6 insulation electrical equipments are accurately mended
Gas；By way of external high pressure SF6 gas cylinders, the air valve being connected in density meter threeway with electrical equipment is closed, to density meter gas
Room carries out the boost action value of gas injection and test density table.
The utility model compact is light, easy to operate easy-to-use, can effectively solve conventional method field-checking densitometer
Electrical human hand action and contact action is asynchronous, eye-observation have the collimation error, discharge quantity it is uncontrollable, because in density meter gas chamber
Tolerance is smaller to deflate too fast the shortcomings of error is caused to amplify.Multi-use simultaneously, can examine the lifting/lowering of SF6 density meters to press
Work value also can carry out accurate tonifying Qi, moreover it is possible to which the SF6 gases of discharge are recycled to SF6 insulation electrical equipments.
Description of the drawings
Fig. 1 is the single unit system schematic diagram of the utility model；
Fig. 2 is the circuit diagram of tester host；
Fig. 3 is tester host cut-away view；
Fig. 4 is electromagnetic relay schematic diagram；
Fig. 5 is the principle schematic of miniature electromagnetic valve；
Fig. 6 is small-sized SF6 gas cylinders schematic diagram.
Specific embodiment
Portable density table contact tester as shown in Figure 1, Figure 2, Figure 3 shows, including tester host 1, is arranged at host
Push-button switch SB, two test wire slot 1-1, rechargeable battery charge port 1-4, micro buzzer-phone HA on shell 1-2, shine
Diode VD, the first solenoid valve crossover sub 5 and second solenoid valve crossover sub 6, the relay being arranged in host housing
KEM, miniature electromagnetic valve DT, rechargeable battery DC, the first PU tracheaes 7 being connected on the first solenoid valve crossover sub 5 and tracheae end
The non-return valve crossover sub 2 of head, the 2nd PU tracheaes 8 and the gas cylinder of tracheae end being connected on second solenoid valve crossover sub 6
Crossover sub 3, the small-sized SF6 gas cylinders 4 to connect with gas cylinder crossover sub 3, two pluggable band crocodiles in test wire slot 1-1
The test wire 9 of fish folder.First solenoid valve crossover sub 5 and second solenoid valve crossover sub 6 are installed on miniature electromagnetic valve DT.
The tester host 1 is included by push-button switch SB, relay normally closed contact K1, miniature electromagnetic valve DT connection groups
Into air valve control circuit；The alarm signal being made of relay normally open contact K2, micro buzzer-phone HA, light emitting diode VD connections
Number circuit；By two test wire slot 1-1 of relay coil contact K connections, further through two band crocodile clips being inserted on slot
Test wire 9 be connected with SF6 density meter contacts KD composition switch triggering circuit.Rechargeable battery DC is connected with each circuit and carries
Power supply source.The non-return valve crossover sub 2, gas cylinder crossover sub 3, the first solenoid valve crossover sub 5, the second electromagnetism of the utility model
Valve crossover sub 6 can be replaced according to interface specification.8, two first PU tracheaes 7 used, the 2nd PU tracheaes band crocodile clips
Test wire 9 pipe range and line length can according to scene actually be replaced.Can be low pressure inside small-sized SF6 gas cylinders 4 used
Or vacuum, or high pressure (is higher than equipment air pressure inside), and SF6 is into outgassing direction according to the height of 4 air pressure inside of SF6 gas cylinders
It is low and convert.
Tester host each several part circuit is loaded in engineering plastics shell 1-2, and is fixed with plastic buckle 1-3, in work
Engineering plastics housing openings installation push-button switch SB, micro buzzer-phone HA, light emitting diode VD, two test wire slot 1-1, fill
Electric battery charging port 1-4, solenoid valve crossover sub A 5, solenoid valve crossover sub B 6.
As shown in figure 4, the relay KEM is electromagnetic relay, equipped with one group of normally closed contact K1, one group of normal opened contact
K2, one group of coil contact K being connected on density monitor KD.
As shown in figure 5, the miniature electromagnetic valve DT include valve body 2-1, air inlet 2-2, gas outlet 2-3, solenoid 2-4,
Coil windings 2-5, conducting wire 2-6, plunger 2-7, spring 2-8, aperture 2-9.
As shown in fig. 6, the small-sized SF6 gas cylinders include SF6 gas cylinders 4, non-return valve 4-1, triple valve 4-2.
The utility model can realize following functions：
A. turned on and off using air valve control circuit control miniature electromagnetic valve DT.Miniature electromagnetic valve conducting wire 2-6 connection gas
Valve controling circuit is mounted on the first non-return valve crossover sub 2 on the non-return valve of SF6 density meters, passes through the first PU tracheaes 7, the
One solenoid valve crossover sub 5 is connected to solenoid valve air inlet 2-2；Gas cylinder crossover sub 3 is mounted on small-sized SF6 gas cylinders 4, is led to
Cross the 2nd PU tracheaes 8, second solenoid valve crossover sub 6 is connected on electromagnetism valve air gate 2-3；Push-button switch SB is pressed, electricity
Flowing through oversampling circuit normally closed contact K1 makes coil windings 2-5 charged, and plunger 2-7 is attracted under electromagnetic force, opens aperture 2-9,
Gas circuit turns on；Push-button switch SB is decontroled, coil windings 2-5 dead electricity is no longer attracted plunger 2-7, spring 2-8 compression plungers 2-7
Closed aperture 2-9, gas circuit are closed；
B. the lifting/voltage reducing working value of SF6 density meters is verified.It is close that tester entry/exit gas port is connected respectively to SF6
It spends on table gas chamber and small-sized SF6 gas cylinders 4, small-sized SF6 gas cylinders 4 can be high low pressure gas cylinder；Two test wires 9 with crocodile clip
It is connected on the one of contact of SF6 density meters, presses push-button switch SB, air valve control circuit control miniature electromagnetic valve DT is led
It is logical that/gas injection is exhausted；With pressure alteration in SF6 density meter tables, density monitor is triggered in density meter table, density relay
The normally opened node of device is closed, and switch triggering power on circuitry, the coil K of electromagnetic relay KEM is charged, and normally closed contact K1 is opened, air valve
Control circuit dead electricity, miniature electromagnetic valve DT close gas circuit；Normal opened contact K2 is closed, signal alarm power on circuitry, buzzer HA rings
It cries, light emitting diode VD lights carry out signal alarm.Buzzer, light emitting diode signal to alarm and be closed with miniature electromagnetic valve DT
Gas circuit avoids human hand action and contact acts asynchronous, eye-observation and has the collimation error, discharge quantity can not to complete simultaneously
It controls, because of the smaller too fast error caused by causing the factors such as error amplification of deflating of tolerance in density meter gas chamber.
C. realize that SF6 gases recycle using principle of differential pressure.Tester entry/exit gas port is connected respectively to SF6 density meter gas
On room and small-sized SF6 low pressure/vacuum gas cylinder 4, push-button switch SB, air valve control circuit control miniature electromagnetic valve DT conductings are pressed
Gas circuit, under the action of principle of differential pressure, SF6 gases are entered by miniature electromagnetic valve DT and connecting pipe from SF6 density meters gas chamber
Small-sized SF6 low pressure/vacuum gas cylinder 4, avoid SF6 gases enter air caused by environmental pollution, avoid in SF6 gases other into
Divide damage health.
D. the accurate tonifying Qi of SF6 insulation electrical equipments is realized using principle of differential pressure.Tester entry/exit gas port is connected respectively to
On SF6 density meters gas chamber and small-sized SF6 gas cylinders 4, two test wires 9 with crocodile clip are connected to SF6 density meters wherein
On one contact, push-button switch SB, air valve control circuit control miniature electromagnetic valve DT conducting gas circuits, in principle of differential pressure are pressed
Under effect, SF6 gases enter SF6 density meter gas chambers by miniature electromagnetic valve DT and connecting pipe from small-sized SF6 gas cylinders 4,
With pressure rise in SF6 density meter tables, density monitor is triggered in density meter table, and control miniature electromagnetic valve DT closes gas
Road, pressure closes gas circuit to complete simultaneously to working value and miniature electromagnetic valve DT in SF6 density meter tables, while gas injection terminates
Ensure accurate gas injection rate.
Claims (3)
1. portable density table contact tester, which is characterized in that including tester host (1), be arranged at host housing (1-2)
On push-button switch SB, two test wire slots (1-1), rechargeable battery charge port (1-4), micro buzzer-phone HA, shine two
Pole pipe VD, the first solenoid valve crossover sub (5) and second solenoid valve crossover sub (6), the relay being arranged in host housing
KEM, miniature electromagnetic valve DT, rechargeable battery DC, the first PU tracheaes (7) and gas being connected on the first solenoid valve crossover sub (5)
The non-return valve crossover sub (2) of pipe end, the 2nd PU tracheaes (8) and the tracheae being connected on second solenoid valve crossover sub (6)
The gas cylinder crossover sub (3) of end, the small-sized SF6 gas cylinders (4) to connect with gas cylinder crossover sub (3), two pluggable to test
The test wire (9) with crocodile clip in line slot (1-1)；First solenoid valve crossover sub (5) and second solenoid valve crossover sub
(6) it is installed on miniature electromagnetic valve DT；
The tester host (1) includes being made of push-button switch SB, relay normally closed contact K1, miniature electromagnetic valve DT connections
Air valve control circuit；The alarm signal being made of relay normally open contact K2, micro buzzer-phone HA, light emitting diode VD connections
Circuit；By two test wire slots (1-1) of relay coil contact K connections, further through two band crocodile clips being inserted on slot
Test wire (9) be connected with SF6 density meter contacts KD composition switch triggering circuit；Rechargeable battery DC is connected with each circuit
Power supply is provided；The relay KEM is electromagnetic relay, equipped with one group of normally closed contact K1, one group of normal opened contact K2, one group of coil
Contact K.
2. portable density table contact tester according to claim 1, which is characterized in that the small-sized SF6 gas cylinders (4)
It is connected by gas cylinder check valve (4-1) with gas cylinder crossover sub (3).
3. portable density table contact tester according to claim 1 or 2, which is characterized in that the small-sized SF6 gas cylinders
(4) internal be low pressure either vacuum or be high pressure higher than equipment air pressure inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387864.9U CN207380209U (en) | 2017-10-26 | 2017-10-26 | Portable density table contact tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387864.9U CN207380209U (en) | 2017-10-26 | 2017-10-26 | Portable density table contact tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207380209U true CN207380209U (en) | 2018-05-18 |
Family
ID=62337271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721387864.9U Active CN207380209U (en) | 2017-10-26 | 2017-10-26 | Portable density table contact tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207380209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677957A (en) * | 2017-10-26 | 2018-02-09 | 云南省送变电工程公司 | Portable density table contact tester |
| CN110429002A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | A kind of gas density relay of insulation performance self-test |
-
2017
- 2017-10-26 CN CN201721387864.9U patent/CN207380209U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677957A (en) * | 2017-10-26 | 2018-02-09 | 云南省送变电工程公司 | Portable density table contact tester |
| CN107677957B (en) * | 2017-10-26 | 2024-01-30 | 云南省送变电工程公司 | Portable density meter contact calibrator |
| CN110429002A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | A kind of gas density relay of insulation performance self-test |
| CN110429002B (en) * | 2019-09-04 | 2023-09-22 | 上海乐研电气有限公司 | Gas density relay with insulating property self-test function |
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