CN208384067U - A kind of low pressure voltage-withstand test circuit - Google Patents
A kind of low pressure voltage-withstand test circuit Download PDFInfo
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- CN208384067U CN208384067U CN201820825520.XU CN201820825520U CN208384067U CN 208384067 U CN208384067 U CN 208384067U CN 201820825520 U CN201820825520 U CN 201820825520U CN 208384067 U CN208384067 U CN 208384067U
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- transformer
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Abstract
The utility model discloses a kind of low pressure voltage-withstand test circuits, including linked switch, power supply instruction unit, experiment control unit, self coupling boosting rectifier control unit and pressure resistance experiment indicating unit, alternating current is electrically connected with the input terminal and self coupling boosting rectifier control unit of the input terminal of the power supply instruction unit and experiment control unit respectively by linked switch, and input terminal of the output end of the experiment control unit respectively with the input terminal of the self coupling boosting rectifier control unit, pressure resistance experiment indicating unit is electrically connected.The low pressure voltage-withstand test circuit of the utility model can carry out the control and output control instructions of voltage-withstand test to equipment under test, convenient for observation, moreover it is possible to which the safety operation performance for effectively improving test protects equipment under test injury-free.
Description
Technical field
The utility model belongs to electrical test experience technical field more particularly to a kind of low pressure voltage-withstand test circuit.
Background technique
In recent years, electrical equipment demand is grown rapidly with the increase of electrical energy demands, and nearly all manufacture is electrically set
Standby enterprise is to improve its production efficiency and the quality of production, often carries out pressure-resistant experiment to the component of electrical equipment.Pressure resistance is surveyed
Examination is that electric appliance, electrical equipment, electric device, electric wiring and electrical safety apparatus etc. is examined to bear overvoltage ability and insulation energy
One of main method of power, and the important means of detection insulation of electrical installation defect or failure are to ensure electric system peace
An important link in row for the national games and maintenance work, electrical equipment through pressure test it can be found that insulation local defect, by
Tide and aging.But there are some problems for existing voltage withstanding experiment device, and such as operation, observation is inconvenient, and detection time is difficult to control,
The problems such as being easy to happen danger.If one all pilot project of every detection only needs primary connection test and comparison cumbersome, delay
Entire experimental period.
Utility model content
The purpose of this utility model is to provide a kind of low pressure voltage-withstand test circuit, the low pressure voltage-withstand tests of the utility model
Circuit can carry out the control and output control instructions of voltage-withstand test to equipment under test, convenient for observation, moreover it is possible to effectively improve test
Safety operation performance, protect equipment under test injury-free, the utility model use following technical effect:
According to the one aspect of this hair utility model, a kind of low pressure voltage-withstand test circuit is provided, it is characterised in that: including
Linked switch, power supply instruction unit, experiment control unit, self coupling boosting rectifier control unit and pressure resistance experiment indicating unit, alternating current are logical
Cross input terminal and self coupling boosting rectifier control of the linked switch respectively with the input terminal of the power supply instruction unit and experiment control unit
Unit electrical connection, the output end of the experiment control unit respectively with the input terminal of the self coupling boosting rectifier control unit, pressure resistance
Test the input terminal electrical connection of indicating unit.
Preferably, the power supply instruction unit includes power transformer, the first power supply indicator and second source indicator light,
The experiment control unit includes the first button switch, the second button switch, contactor, travel switch and the time relay, institute
State self coupling boosting rectifier control unit include voltage relay, electric current relay, the first intermediate relay, the second intermediate relay, from
Coupling pressure regulator, step-up transformer and third rotary switch, the pressure resistance experiment indicating unit includes current detector, voltage detecting
Table is detected output end, calibration output terminal, experiment alarm, pressure resistance breakdown indicator light and pressure resistance experiment indicator light；
The zero line L of alternating current by linked switch respectively with one end of first button switch, power transformer the
One end electrical connection of 4th normal open switch of one primary tap and contactor, the primary tap of the second of the power transformer with
The zero line side of alternating current connects, the first secondary tap of the power transformer respectively with one end of the first normal open switch of contactor,
One end of second normal open switch of contactor is electrically connected, and the other end of the first normal open switch of the contactor passes through the first electricity
The other end of the electrical connection of the second subprime tap of source indicator light and power transformer, the second normal open switch of the contactor is logical
The second subprime tap for crossing second source indicator light and power transformer is electrically connected；
The other end of first button switch respectively with one end of the normally closed switch of the first intermediate relay, electric current relay
One end of the normal open switch of device, one end of the normal open switch of the first intermediate relay, third rotary switch normal open switch one
End, one end of normal open switch of voltage relay, the second intermediate relay normal open switch one end electrical connection, described first
The other end of the normally closed switch of intermediate relay by the normally closed switch of the time relay respectively with second button switch
One end, contactor third normal open switch one end electrical connection, the other end and the stroke of second button switch open
One end of pass connects, the other end of the trip switch other end and contactor with the third normal open switch of the contactor respectively
One end electrical connection, the zero line side N of the other end of the contactor and alternating current is electrically connected；
One end of the other end of 4th normal open switch of the contactor and the automatic coupling voltage regulator is electrically connected, it is described from
One end for adjusting tap terminals and electric current relay of coupling pressure regulator is electrically connected, the other end of the electric current relay respectively with it is described
One end electrical connection of the first primary input terminal, voltage relay of step-up transformer, the other end point of the voltage relay
Not with the second primary input terminal of step-up transformer, the other end of automatic coupling voltage regulator, contactor the 5th normal open switch one end
Electrical connection, the other end of the 5th normal open switch of contactor and the zero line side N of alternating current are electrically connected；
First secondary output end of the step-up transformer passes through one end of current detector and the detected output end
The second subprime output end of electrical connection, the other end and the step-up transformer that are detected output end is electrically connected, and boosting becomes
The one end of the third secondary output end of depressor respectively with one end of voltage detecting table, calibration output terminal is electrically connected, voltage inspection
The other end for surveying table, the other end for calibrating output terminal are electrically connected with the 4th secondary output end of step-up transformer respectively；Institute
State the other end of the normal open switch of electric current relay, the other end of the normal open switch of the first intermediate relay, the first intermediate relay
One end of the normally closed switch of one end and third rotary switch of device is connect with one end of the pressure resistance breakdown indicator light, third knob
The other end of the normally closed switch of the other end and third rotary switch of the normally closed switch of switch respectively with the experiment alarm
One end electrical connection；
The other end of the normal open switch of the voltage relay, the second intermediate relay normal open switch the other end,
One end of one end and the pressure resistance experiment indicator light of one end of two intermediate relays and the time relay is electrically connected, and described the
The other end of one intermediate relay, pressure resistance puncture the other end of indicator light, test the other end, the second intermediate relay of alarm
The other end, the other end of the time relay and the zero line side N of the other end and the alternating current of pressure resistance experiment indicator light electrically connect
It connects.
Preferably, the voltage range of the voltage relay is 50V-220V, the current range of electric current relay is 1.5A-
6A。
Preferably, the voltage output range of the automatic coupling voltage regulator is 0-250V, the voltage output range of step-up transformer
For 0-5KV.
Preferably, the 4th secondary output end of the third secondary output end of the step-up transformer or step-up transformer with
Potentiometer PR0 is connected between calibration output terminal.
In conclusion the utility model has following technical effect that since the utility model uses above-mentioned technical proposal
(1), convenient for operation and observation, the utility model passes through experiment control unit, self coupling boosting rectifier control unit and pressure resistance
Output unit carries out testing and control and output control instructions, convenient for control and observation.
(2), the testing time can be adjusted, and the utility model is passed through by time relay adjusting voltage or electric current
Time, to have adjusted the testing time of low pressure pressure resistance, it is ensured that test voltage changes within a certain period of time.
(3) test operation safety, the utility model self coupling boosting rectifier control unit can be in certainly even output voltage regulator and liters
The supply of control alternating current is carried out between pressure transformer input terminal；When measured device pressure resistance is abnormal, leakage current is excessively high, electric current relay
Device movement, cutting alternating current supply protect equipment under test injury-free to improve the safety operation performance of test.
Detailed description of the invention
Fig. 1 is a kind of functional block diagram of low pressure voltage-withstand test circuit of the utility model；
Fig. 2 is a kind of working principle diagram of low pressure voltage-withstand test circuit of the utility model；
In attached drawing, 101-ElectricitySource indicating unit, 102- experiment control unit, 103- self coupling boosting rectifier control unit, 104- are resistance to
Indicating unit is tested in compacting.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, referring to the drawings and enumerate excellent
Embodiment is selected, the utility model is further described.However, it is necessary to illustrate, many details listed in specification
It is specific even without these just for the sake of making reader have a thorough explanation to the one or more aspects of the utility model
Details also may be implemented the utility model these aspect.
As depicted in figs. 1 and 2, a kind of low pressure voltage-withstand test circuit according to the present utility model, it is characterised in that: including connection
Dynamic switch QF, power supply instruction unit 101, experiment control unit 102, self coupling boosting rectifier control unit 103 and pressure resistance experiment instruction are single
Member 104, alternating current by linked switch QF respectively with the input terminal of the power supply instruction unit 101 and experiment control unit 102
Input terminal and self coupling boosting rectifier control unit 103 are electrically connected, the output end of the experiment control unit 102 respectively with the self coupling
The input terminal electrical connection of the input terminal, pressure resistance experiment indicating unit 104 of boosting rectifier control unit 103；The power supply instruction unit
101 include power transformer T1, the first power supply indicator HY1 and second source indicator light HY2, the experiment control unit 102
Including the first button switch SS, the second button switch SF, contactor KM1, travel switch S and time relay KT1, the self coupling
Boosting rectifier control unit 103 includes voltage relay KV1, electric current relay KA1, the first intermediate relay K1, the second intermediate relay
Device K2, automatic coupling voltage regulator T2, step-up transformer T3 and third rotary switch SA, the pressure resistance experiment indicating unit 104 includes electricity
Stream detection table PA, voltage detecting table PV, output end, calibration output terminal, experiment alarm HA, pressure resistance breakdown indicator light are detected
HR and pressure resistance experiment indicator light HG；
The zero line L of alternating current by linked switch QF respectively with one end of the first button switch SS, power transformer
One end electrical connection of the 4th normal open switch KM1-4 of the primary tap of the first of T1 and contactor KM1, the power transformer T1
The second primary tap and alternating current zero line side N connection, the first secondary tap of power transformer T1 respectively with contactor KM1
One end of the first normal open switch KM1-1, contactor KM1 the second normal open switch KM1-2 one end electrical connection, the contact
The other end of the first normal open switch KM1-1 of device KM1 passes through second of the first power supply indicator HY1 and power transformer T1
Grade tap electrical connection, the other end of the second normal open switch KM1-2 of the contactor KM1 pass through second source indicator light HY2
It is electrically connected with the second subprime tap of power transformer T1；
The other end of the first button switch SS respectively with the normally closed switch K1-1 of the first intermediate relay K1 one
End, one end of normal open switch KA1-1 of electric current relay KA1, the first intermediate relay K1 normal open switch K1-2 one end,
One end of the normal open switch of third rotary switch SA, one end of the normal open switch KV1-1 of voltage relay KV1, among second after
One end of the normal open switch K2-1 of electric appliance K2 is electrically connected, the other end of the normally closed switch K1-1 of the first intermediate relay K1
By the normally closed switch KT1-1 of time relay KT1 respectively with one end of the second button switch SF, contactor KM1
One end of three normal open switch KM1-3 is electrically connected, the other end of the second button switch SF and one end of the travel switch S
Connection, the other end of the trip switch S respectively with the other end of the third normal open switch KM1-3 of the contactor KM1 and contact
One end of device KM1 is electrically connected, and the other end of contactor KM1 and the zero line side N of alternating current are electrically connected；
One end of the other end and the automatic coupling voltage regulator T2 of the 4th normal open switch KM1-4 of the contactor KM1 is electrical
Connection, the automatic coupling voltage regulator T2's adjusts tap terminals and one end electrical connection of electric current relay KA1, the electric current relay
The one end of the other end of KA1 respectively with the first primary input terminal of the step-up transformer T3, voltage relay KV1 electrically connects
Connect, the other end of the voltage relay KV1 respectively with the second primary input terminal of step-up transformer T3, automatic coupling voltage regulator T2
The other end, contactor KM1 the 5th normal open switch KM1-5 one end electrical connection, the 5th normal open switch KM1- of contactor KM1
5 other end and the zero line side N of alternating current are electrically connected；
As depicted in figs. 1 and 2, the first secondary output end of the step-up transformer T3 by current detector PA with it is described
The one end 21 for being detected output end is electrically connected, and is detected second of the other end 23 and step-up transformer T3 of output end
Grade output end electrical connection, the third secondary output end of step-up transformer T3 are defeated with one end of voltage detecting table PV, calibration respectively
One end 25 of terminal is electrically connected out, the other end of voltage detecting table PV, calibrate the other end 27 of output terminal respectively with boosting
The 4th secondary output end of transformer T3 is electrically connected；The other end of the normal open switch KA1-1 of the electric current relay KA1,
The other end of the normal open switch K1-2 of one intermediate relay K1, one end of the first intermediate relay K1 and third rotary switch SA
One end of normally closed switch with it is described pressure resistance breakdown indicator light HR one end connect, the normally closed switch of third rotary switch SA it is another
The one end of the other end of the normally closed switch of end and third rotary switch SA respectively with the experiment alarm HA is electrically connected, in institute
State step-up transformer T3 third secondary output end or step-up transformer T3 the 4th secondary output end and calibration output terminal it
Between be connected with potentiometer PR0, be connected between the 4th secondary output end and calibration output terminal 27 of the step-up transformer T3
Potentiometer PR0, the tested equipment for being detected output end 21 and 23 in the detection process, are calibrated between output terminal 25 and 27
External calibration table carries out real-time tracking calibration, and the size of calibration voltage can be adjusted by potentiometer PR0.
As shown in Fig. 2, the other end of the normal open switch KV1-1 of the voltage relay KV1, the second intermediate relay K2
One end of the other end of normal open switch K2-1, one end of the second intermediate relay K2 and time relay KT1 and the resistance to compacting
One end electrical connection of indicator light HG is tested, the other end of the first intermediate relay K1, pressure resistance puncture the another of indicator light HR
End, the experiment other end of alarm HA, the other end of the second intermediate relay K2, the other end of time relay KT1 and pressure resistance
The zero line side N of the other end and the alternating current of testing indicator light HG is electrically connected.The voltage range of the voltage relay KV1
Current range for 50V-220V, electric current relay KA1 is 1.5A-6A.The voltage output range of the automatic coupling voltage regulator T2 is
0-250V, the voltage output range of the step-up transformer are 0-5KV.When adjustment is connected in parallel on the electricity of automatic coupling voltage regulator T2 primary
Potential relay KV1 makes its starting when the test voltage of T2 grade of automatic coupling voltage regulator is raised to assigned voltage value, normal voltage relay
The normal open switch KV1-1 turn-on time relay KT1 of device KV1, timing start, and stop the behaviour of the boosting to automatic coupling voltage regulator T2 at this time
Make, time relay KT1, adjustment disconnects certainly in delay 1S, the normally closed switch KT1-1 Time Delay Opening of time relay KT1
The power supply of coupling pressure regulator T2, off-test, when by testing equipment (the 21st terminal and the 23rd terminal that step-up transformer T3 is exported)
Pressure resistance it is unqualified when, since leakage current is excessive, the electric current relay KA1 for being series at automatic coupling voltage regulator T2 primary is started, vertical
That is open test power supply tests alarm HA and issues buzzing alarm.In order to prevent maloperation and apply suddenly too high voltages damage
The accident of bad equipment under test occurs, i.e., could starting contactor when the adjusting output voltage of automatic coupling voltage regulator T2 is zero-pressure position
KM1, the power supply of call through test circuit, to play the role of zero-pressure start protection.Specific experiment behaviour's process is as follows: power turn-on
Linked switch QF, power transformer T1 are powered, and halt indicator, that is, second source indicator light HY2 is lit, and work as automatic coupling voltage regulator
When the position of the adjustment of T2 is zero-bit, for travel switch S by sky in the adjustment position of automatic coupling voltage regulator T2, travel switch S's is normally opened
Contact closure, when at this moment pressing the second button switch SF and being started, contactor KM1 coil, which is powered, to be attracted, contactor KM1
The first normal open switch KM1-1 closure, test indicator light HY1 lamp light；Its auxiliary contact KM1-2 disconnection halt indicator (the
Two power supply indicator HY2) extinguish；Automatic coupling voltage regulator T2 is simultaneously closed by the third normal open switch KM1-3 of contactor KM1 from interlocking
Tentaculum KM1 coil, main contact KM1-4 and KM1-5 then connect automatic coupling voltage regulator T2 power supply.When adjusting automatic coupling voltage regulator T2, make
Secondary power also just slowly rises to the primary voltage of step-up transformer T3, makes the test voltage of T3 grade of step-up transformer also
It is promoted at leisure, adjustment is parallel to the setting valve of the voltage relay KV1 of step-up transformer T3 primary coil, tries when boosting to
When testing voltage value, voltage relay KV1 coil is attracted, and normally open contact KV1-1 connects the second intermediate relay K2 and time
The normal open switch K2-1 closure of the coil power of relay KT1, the second intermediate relay K2 is self-locking, pressure resistance experiment indicator light HG point
Bright, pressure test timing starts, after delay to regulation pressure test time, the normally closed interlock (switch) of time relay KT1
KT1-1 is opened, and is disconnected contactor KM1 coil power and is disconnected, auxiliary contact KM1-4, KM1-5 are opened, automatic coupling voltage regulator T2's
Primary power loss, off-test.When equipment under test dielectric strength is inadequate, when breakdown during pressure build-up test, due to leakage electricity
It flows through greatly, causes testing transformer T3 primary current excessive, electric current relay KA1 coil is attracted, and electric current relay KA1's is normally opened
Switch KA1-1 closure, the first intermediate relay K1 coil are powered, and the normal open switch K1-2 of the first intermediate relay K1 is closed simultaneously certainly
Lock, pressure resistance breakdown indicator light are lighted, and experiment alarm HA is switched on and beeps, to show alarm, the first intermediate relay
K1 normally closed switch K1-1 contact is opened, and contactor KM1 coil power, contactor KM1 auxiliary switch contact (contactor KM1 are disconnected
The 4th normal open switch KM1-4 and contactor KM1 the 5th normal open switch KM1-5) open, cutting automatic coupling voltage regulator T2 is primary
Power supply stops test；If the adjustment of automatic coupling voltage regulator T2 is not in zero-bit, because the contact of limit switch S is in normally open,
At this moment press the second button switch SF also can not starting contactor KM, test can not carry out, in this way it is avoided that test transformation
Device generates high pressure suddenly, damages equipment under test.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, can also make several improvements and retouch, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (5)
1. a kind of low pressure voltage-withstand test circuit, it is characterised in that: including linked switch, power supply instruction unit, experiment control unit,
Self coupling boosting rectifier control unit and pressure resistance experiment indicating unit, alternating current are defeated with the power supply instruction unit respectively by linked switch
Enter input terminal and the electrical connection of self coupling boosting rectifier control unit at end and experiment control unit, the output end of the experiment control unit
The input terminal with the input terminal of the self coupling boosting rectifier control unit, pressure resistance experiment indicating unit is electrically connected respectively.
2. a kind of low pressure voltage-withstand test circuit according to claim 1, it is characterised in that: the power supply instruction unit includes
Power transformer, the first power supply indicator and second source indicator light, the experiment control unit include the first button switch, the
Two button switches, contactor, travel switch and the time relay, the self coupling boosting rectifier control unit include voltage relay, electricity
Current relay, the first intermediate relay, the second intermediate relay, automatic coupling voltage regulator, step-up transformer and third rotary switch, institute
Pressure resistance experiment indicating unit is stated to include current detector, voltage detecting table, be detected output end, calibration output terminal, experiment report
Alert device, pressure resistance breakdown indicator light and pressure resistance experiment indicator light；
The zero line L of alternating current by linked switch respectively with one end of first button switch, power transformer first at the beginning of
One end electrical connection of 4th normal open switch of grade tap and contactor, the primary tap of the second of the power transformer and alternating current
Zero line side connection, the first secondary tap of the power transformer respectively with one end of the first normal open switch of contactor, contact
One end of second normal open switch of device is electrically connected, and the other end of the first normal open switch of the contactor is referred to by the first power supply
Show that the second subprime tap of lamp and power transformer is electrically connected, the other end of the second normal open switch of the contactor passes through the
The electrical connection of the second subprime tap of two power supply indicators and power transformer；
The other end of first button switch respectively with one end of the normally closed switch of the first intermediate relay, electric current relay
One end of normal open switch, one end of the normal open switch of the first intermediate relay, one end of the normal open switch of third rotary switch, electricity
One end of the normal open switch of potential relay, the second intermediate relay normal open switch one end electrical connection, among described first
The other end of the normally closed switch of relay by the normally closed switch of the time relay respectively with one end of second button switch,
One end of the third normal open switch of contactor is electrically connected, the other end of second button switch and the one of the travel switch
End connection, other end one end with the other end of the third normal open switch of the contactor and contactor respectively of the trip switch
Electrical connection, the other end of the contactor and the zero line side N of alternating current are electrically connected；
The other end of 4th normal open switch of the contactor and one end of the automatic coupling voltage regulator are electrically connected, the self coupling tune
One end for adjusting tap terminals and electric current relay of depressor is electrically connected, the other end of the electric current relay respectively with the boosting
One end electrical connection of first primary input terminal of transformer, voltage relay, the other end of the voltage relay respectively with
Second primary input terminal of step-up transformer, the other end of automatic coupling voltage regulator, contactor the 5th normal open switch one end it is electrical
Connection, the other end of the 5th normal open switch of contactor and the zero line side N of alternating current are electrically connected；
First secondary output end of the step-up transformer is electrical by one end of current detector and the detected output end
The second subprime output end of connection, the other end and the step-up transformer that are detected output end is electrically connected, step-up transformer
Third secondary output end respectively with one end of voltage detecting table, calibrate output terminal one end be electrically connected, voltage detecting table
The other end, calibrate output terminal the other end respectively with the 4th secondary output end of step-up transformer be electrically connected；The electricity
The other end of the normal open switch of current relay, the other end of the normal open switch of the first intermediate relay, the first intermediate relay
One end of the normally closed switch of one end and third rotary switch is connect with one end of the pressure resistance breakdown indicator light, third rotary switch
Normally closed switch the other end and third rotary switch normally closed switch the other end respectively with it is described experiment alarm one end
Electrical connection；
The other end of the normal open switch of the voltage relay, the second intermediate relay normal open switch the other end, in second
Between one end of relay and one end of the time relay and one end of the pressure resistance experiment indicator light be electrically connected, in described first
Between the other end of relay, pressure resistance breakdown indicator light the other end, test the other end of alarm, the second intermediate relay it is another
The zero line side N of one end, the other end of the other end of the time relay and pressure resistance experiment indicator light and the alternating current is electrically connected.
3. a kind of low pressure voltage-withstand test circuit according to claim 2, it is characterised in that: the voltage of the voltage relay
Range is 50V-220V, the current range of electric current relay is 1.5A-6A.
4. a kind of low pressure voltage-withstand test circuit according to claim 2, it is characterised in that: the voltage of the automatic coupling voltage regulator
Output area is 0-250V, and the voltage output range of step-up transformer is 0-5KV.
5. a kind of low pressure voltage-withstand test circuit according to claim 2, it is characterised in that: the of the step-up transformer
Potentiometer is connected between three secondary output ends or the 4th secondary output end and calibration output terminal of step-up transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820825520.XU CN208384067U (en) | 2018-05-30 | 2018-05-30 | A kind of low pressure voltage-withstand test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820825520.XU CN208384067U (en) | 2018-05-30 | 2018-05-30 | A kind of low pressure voltage-withstand test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208384067U true CN208384067U (en) | 2019-01-15 |
Family
ID=64969410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820825520.XU Expired - Fee Related CN208384067U (en) | 2018-05-30 | 2018-05-30 | A kind of low pressure voltage-withstand test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208384067U (en) |
-
2018
- 2018-05-30 CN CN201820825520.XU patent/CN208384067U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190115 Termination date: 20190530 |