CN206838049U - A kind of electrode automatic switchover system of retort - Google Patents

A kind of electrode automatic switchover system of retort Download PDF

Info

Publication number
CN206838049U
CN206838049U CN201720320102.0U CN201720320102U CN206838049U CN 206838049 U CN206838049 U CN 206838049U CN 201720320102 U CN201720320102 U CN 201720320102U CN 206838049 U CN206838049 U CN 206838049U
Authority
CN
China
Prior art keywords
electrode
switch
plc
relay
transmitter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201720320102.0U
Other languages
Chinese (zh)
Inventor
李艳华
廖家银
黄青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Kanghong Biotechnologies Co Ltd
Original Assignee
Chengdu Kanghong Biotechnologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Kanghong Biotechnologies Co Ltd filed Critical Chengdu Kanghong Biotechnologies Co Ltd
Priority to CN201720320102.0U priority Critical patent/CN206838049U/en
Application granted granted Critical
Publication of CN206838049U publication Critical patent/CN206838049U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The utility model discloses a kind of electrode automatic switchover system of retort, contain retort, primary electrode, backup electrode, transmitter, warning device, PLC, electric cabinet, the current switching of AC relay is controlled by PLC, realizes electrode automatic switchover and auto-alarm function.The utility model automatic switchover reaction speed is fast, accuracy is high, and maintenance cost is low, is widely portable to the supporting installation of retort and the transformation of old retort.

Description

A kind of electrode automatic switchover system of retort
Technical field
The utility model belongs to pharmaceutical machinery technical field, and in particular to a kind of electrode automatic switchover system of retort.
Background technology
The technique productions cycle such as productive culture, production of raw medicine involved by pharmaceutical industry is longer, and production cycle domestic demand Specific environment is for example in maintenance reaction tank:Gnotobasis, anaerobic environment etc., to the index such as dissolved oxygen, pH value, foam in retort It is it is required that particularly harsh.At present during pharmaceutical technology, retort generally use " single electrode+PLC " pattern carries out On-line Control, And electrode belongs to conventional consumptive material, service life is short, especially during productive culture, easily breaks down.Once there is event in electrode Barrier, PL controllers cause whole production routine control disorder, the production for causing the batch to be produced because that can not obtain accurate parameter Product are not up to standard, directly contribute serious economic loss.Therefore, cause what production failed to solve the maintenance of single electrode disorderly closedown Technical problem, those skilled in the art would generally be solved in the following ways:
The first scheme, increase a set of electrode transmitter, backup electrode in reactor control system, go out in a set of electrode During existing failure, parameter detecting and control are carried out by operating personnel's manual switching to another set of electrode.
Second scheme, increase a set of electrode transmitter and backup electrode independently of reactor control system, a set of When electrode breaks down, parameter detecting is realized with newly-increased absolute electrode transmitter and backup electrode, manually input parameter Control mode is controlled.
However, although above-mentioned solution can solve the technology that the maintenance of single electrode disorderly closedown causes productive culture failure Problem skill, but each the shortcomings that following still be present;
1st, can not accurately be controlled for retort.Scheme one, back-up system external equipment is excessive, data-signal transmission Link is more, parameter error more easily occurs, can not accurately be controlled for retort;And scheme two, parameter must be manually entered Control mode carries out state modulator, is not carried out automatic control, easily causes artificial maloperation.
2nd, technological transformation must be shut down, is verified again.Above-mentioned two solution party, be required to existing retort control system carry out compared with Big change, according to related process code, must take a significant amount of time and carry out shutdown checking, and must treat that qualified rear can be used, can not Meet actual process needs.
Utility model content
To overcome the electrode control system of existing retort not automatically switch, poor accuracy is controlled, checking etc. must be shut down Technical problem, the utility model provide following technical scheme:
A kind of electrode automatic switchover system of retort, contain retort (1), primary electrode (2), backup electrode (3), change Send device (4), warning device (5), PLC (6), electric cabinet (7);
The primary electrode (2), backup electrode (3) are fixedly arranged in retort (1);
The electric cabinet (7) is respectively equipped with primary electrode switch (71), backup electrode switch (72), transmitter switch (73), warning device switch (74), PLC switch (75), its respectively with primary electrode (2), backup electrode (3), pick-up Device (4), warning device (5), PLC (6) are electrical connected.
Transmitter (4) described further is dissolved oxygen transmitter, PH transmitters or defoaming transmitter, provided with signal receiving end (41) and signal output part (42), its signal receiving end (41) pass through signal wire with primary electrode (2), backup electrode (3) respectively It is connected.
Warning device (5) described further is provided with alarm lamp (51), emergency alarm bell (52) and information transmitter (53).
PLC (6) described further is programmable controller, provided with signal input part (61), signal output part (62) and signal transacting modular converter (63), its signal input part (61) pass through signal with transmitter (4) signal output part (42) Line is connected, and signal output part (62) is connected with the information transmitter (53) of warning device (5) by signal wire.
Electric cabinet (7) described further is provided with control circuit, and it is provided with battery main switch (76), the battery main switch (76) One termination public power, the other end of battery main switch (76) successively with primary electrode switch (71), backup electrode switch (72), Transmitter switch (73), PLC switch (75), warning device switch (74) are connected, the primary electrode switch (71) The other end is connected with AC relay (7KA1) normally open contact (7KA11), the other end of backup electrode switch (72) and friendship Current relay (7KA1) normally closed interlock (7KA12) is connected, and AC relay (7KA1) normally open contact (7KA11) other end is with handing over It is connected after current relay (7KA1) normally closed interlock (7KA12) other end parallel connection with AC relay (7KA1), AC relay (7KA1) other end access PLC (6), the other end access ground wire of transmitter switch (73), PLC switch (75) other end access PLC (6) zero line L, PLC (6) zero line side N access ground wires, warning device switch (74) it is connected with AC relay (7KA1) closure contact (7KA13), the emergency alarm bell (52) being connected in parallel, the emergency alarm bell (52) the other end successively with alarm lamp (51), AC relay (7KA2) normally open contact (7KA21), AC relay (7KA2) It is connected, the other end access PLC (6) of AC relay (7KA2), AC relay (KA1) normally closed interlock (KA13) The other end is connected with signal projector (53), signal projector (53) other end access ground wire.
Electrode described further is dissolved oxygen electrode, PH electrodes or defoaming electrode.
Retort (1) described further is provided with execution unit, and its execution unit contains agitator (11), conditioning agent storage dress Put (12) and conditioning agent delivery device (13).
The further agitator (11) is fixedly arranged in retort (1), the regulation agent storage device (12) and regulation Agent delivery device (13) is connected by pipeline, and the conditioning agent delivery device (13) is connected by pipeline with retort (1).
The further agitator (11), conditioning agent delivery device (13) signal output with PLC (6) respectively End (62) is connected by signal wire.
Further it is described regulation storage device (12) be pH value conditioning agent holding vessel, clean compressed air generating means, The one or more of oxygen storage tank or defoamer solution storage tanks, the conditioning agent delivery device (13) be peristaltic pump or and Gas flow controller.
Compared with prior art, the utility model has advantages below:
1st, the utility model provides technical scheme and realizes that electrode automatically switches, and avoids production process electrode from occurring event suddenly Barrier causes shutdown to cause batch production failure, and its on-line checking maximum difference precision allows detection error far below technique, meets Manufacturing technique requirent.
2nd, the utility model avoids the influence to production during scrap build without individually increasing any equipment newly, Reduce the work verified again after equipment key technological transformation.
3rd, the utility model overall structure is simple, reasonable in design, low cost, and system compatibility is strong, applied widely.
Brief description of the drawings
Fig. 1 electrode automatic switchover system structural representations
Fig. 2 electrode automatic switchover system control circuit schematic diagrames
Fig. 3 electrode automatic switchover system structural representations
Fig. 4 electrode automatic switchover system structural representations
Primary clustering symbol description in figure:
1 retort, 11 agitators, 12 regulation agent storage devices, 13 conditioning agent delivery devices;
2 primary electrodes;
3 backup electrodes;
4 transmitters, 41 signal receiving ends, 42 signal output parts;
5 warning devices, 51 alarm lamps, 52 emergency alarm bells, 53 information transmitters;
6PLC controllers, 61 signal input parts, 62 signal output parts, 63 signal transacting modular converters;
7 electric cabinets, 71 primary electrode switch, 72 backup electrodes switch, 73 transmitters switch, 74 warning devices switch, 75PLC controller switches, 76 battery main switches, 7KA1 AC relays, 7KA11 normally open contacts, 7KA12 normally closed interlocks, 7KA13 Normally closed interlock, 7KA2 AC relays, 7KA21 normally open contacts.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, described embodiment can not be used to limit the scope of protection of the utility model.
Embodiment 1, refers to Fig. 1-2, and the present embodiment provides a kind of electrode automatic switchover system of retort, contains reaction Tank (1), primary electrode (2), backup electrode (3), transmitter (4), warning device (5), PLC (6), electric cabinet (7);
Wherein, primary electrode (2), backup electrode (3) are fixedly arranged in retort (1);
Wherein, electric cabinet (7) is respectively equipped with primary electrode switch (71), backup electrode switch (72), transmitter switch (73), warning device switch (74), PLC switch (75), its respectively with primary electrode (2), backup electrode (3), pick-up Device (4), warning device (5), PLC (6) are electrical connected.
PLC (6) by detect primary electrode (2) or and the abnormal data information transmitted of backup electrode (3) come The automatic switchover between primary electrode (2) and backup electrode (3) is realized, and automatic action alarm (5) sends a warning.
Wherein, electrode is conventional dissolved oxygen electrode, PH electrodes or defoaming electrode.
Wherein, transmitter (4) is conventional dissolved oxygen transmitter, PH transmitters or defoaming transmitter, provided with signal receiving end (41) and signal output part (42), its signal receiving end (41) pass through signal wire with primary electrode (2), backup electrode (3) respectively It is connected.
Wherein, warning device (5) is provided with alarm lamp (51), emergency alarm bell (52) and information transmitter (53).
Wherein, PLC (6) is programmable controller, provided with signal input part (61), signal output part (62) and letter Number processing modular converter (63), its signal input part (61) is connected with transmitter (4) signal output part (42) by signal wire, Signal output part (62) is connected with the information transmitter (53) of warning device (5) by signal wire.
Wherein, electric cabinet (7) is provided with control circuit, and it is provided with battery main switch (76), battery main switch (76) one end Public power is connect, the other end of battery main switch (76) switchs (72), pick-up with primary electrode switch (71), backup electrode successively Device switch (73), PLC switch (75), warning device switch (74) be connected, the primary electrode switch (71) it is another End be connected with AC relay (7KA1) normally open contact (7KA11), the backup electrode switch (72) the other end with exchange after Electrical equipment (7KA1) normally closed interlock (7KA12) is connected, AC relay (7KA1) normally open contact (7KA11) other end with exchange after It is connected after electrical equipment (7KA1) normally closed interlock (7KA12) other end parallel connection with AC relay (7KA1), AC relay (7KA1) other end access PLC (6), the other end access ground wire of transmitter switch (73), PLC switch (75) other end access PLC (6) zero line L, PLC (6) zero line side N access ground wires, warning device switch (74) it is connected with AC relay (7KA1) closure contact (7KA13), the emergency alarm bell (52) being connected in parallel, the emergency alarm bell (52) the other end successively with alarm lamp (51), AC relay (7KA2) normally open contact (7KA21), AC relay (7KA2) It is connected, the other end access PLC (6) of AC relay (7KA2), AC relay (KA1) normally closed interlock (KA13) The other end is connected with signal projector (53), signal projector (53) other end access ground wire.
Its electric cabinet (7) control circuit operation principle is:
When power turn-on master switch (76), primary electrode switch (71), backup electrode switch (72), transmitter switch successively (73), when warning device switch (74), PLC switch (75), AC relay (7KA1) is powered, and makes AC relay (7KA1) normally open contact (7KA11) adhesive is powered, and primary electrode (2) starts work, and by signal wire by primary electrode (2) institute The data of detection are transferred to transmitter (4), and data are changed into PLC (6) processing information by transmitter (4), and pass through signal Line is transferred to PLC (6), and data analysis and processing are carried out by PLC (6) signal transacting modular converter (63), and Form various instructions and be sent to retort (1) each execution unit, realize Automated condtrol.
When primary electrode (2) normal work, AC relay (7KA1) is constantly in "on" position, AC relay (7KA1) normally closed interlock (7KA12) disconnects, and backup electrode (3) can not be powered and work.
When primary electrode (2) breaks down power-off suddenly, AC relay (7KA1) dead electricity, AC relay (7KA1) After normally closed interlock (7KA13) adhesive is powered, backup electrode (3) is set to obtain electric and start work, and the data detected are passed through into change Send device (4) to be conveyed to PLC (6) signal transacting modular converter (63) after converting to be handled, and by PLC (6) Send and instruct to retort (1) execution unit, realize Automated condtrol.
There is deviation and during more than deviation set by PLC (6) when primary electrode (2) detects data, PLC Controller (6) can automatically cut off AC relay (7KA1) electric current, make AC relay (7KA1) dead electricity, AC relay (7KA1) normally closed interlock (7KA12) adhesive is powered, and connects backup electrode (3) power supply and starts work.
When primary electrode (2) switches to backup electrode (3), AC relay (7KA1) is in off-position, exchange after Electrical equipment (7KA1) normally closed interlock (7KA12) adhesive, information transmitter (53) is powered, connect automatically with PLC (6) signal It is logical, alarm short message " primary electrode is sent by the fixed frequency according to set in advance instruct to responsible person concerned of PLC (6) Failure, successful switch to backup electrode be controlled, please fix a breakdown or change in time primary electrode.”
When primary electrode (2) is changed or after failture evacuation, PLC (6) can turn on automatically AC relay (7KA1) electric current, AC relay (7KA1) is powered, AC relay (7KA1) normally open contact (7KA11) adhesive, make primary Electrode (2), which is powered, restarts work.When AC relay (7KA1) is powered, AC relay (7KA1) normally closed interlock (7KA12) Disconnect, backup electrode (3) dead electricity is stopped, AC relay (7KA1) normally closed interlock (7KA13) disconnects, information transmitter (53) dead electricity, stop sending alarm short message.
When backup electrode (3) detects data deviation still above the deviation set by PLC (6) or is detected When data still can not be delivered to PLC (6), PLC (6) is by turn on automatically AC relay (7KA2), exchange Relay (7KA2) normally open contact (7KA21) adhesive, emergency alarm bell (52), alarm lamp (51) is powered, realize the sense of hearing, vision report It is alert.PLC (6) uninterruptedly sends alarm short message according to preset instructions to responsible person concerned, and " state modulator is abnormal, please immediately To in-situ processing.”.PLC (6) simultaneously sends manually operated instruction to each execution unit of retort (1), waits related responsibility People is operated manually.
Wherein, retort (1) is provided with execution unit, and its execution unit contains agitator (11), regulation agent storage device (12) and conditioning agent delivery device (13), wherein agitator (11) is fixedly arranged in retort (1), wherein adjusting agent storage device (12) it is connected with conditioning agent delivery device (13) by pipeline, wherein conditioning agent delivery device (13) passes through pipe with retort (1) Road connects.
Wherein agitator (11), conditioning agent delivery device (13) pass through with PLC (6) signal output part (62) respectively Signal wire connects.
PLC (6) according to the data that primary electrode (2) or backup electrode (3) are detected to agitator (11), regulation Agent delivery device (13) sends instruction, the regulation of the mixing speed, conditioning agent delivery device (13) of adjust automatically agitator (11) Agent rate of feeding, realize the precision control of retort (1) productive culture parameter.
Embodiment 2, pH value on-line control system of the electrode automatic switchover system applied to retort, the present embodiment such as Fig. 3, Difference from Example 1 is that electrode uses pH value electrode, and transmitter (4) selects PH transmitters, the conditioning agent of retort (1) Storage device (12) is respectively acid solution holding vessel, alkaline solution holding vessel, and conditioning agent delivery device (13) is peristaltic pump, its Remaining part point is same as Example 1.
Embodiment 3, electrode automation switching system are applied to the dissolved oxygen on-line control system of retort, and the present embodiment is as schemed 4, difference from Example 1 is that electrode uses dissolved oxygen electrode, and transmitter (4) uses dissolved oxygen transmitter, the tune of retort (1) It is respectively oxygen storage tank, clean compressed air generating means to save agent storage device (12), and conditioning agent delivery device (13) is gas Body flow controller, remainder are same as Example 1.
Embodiment 4, defoaming control system of the electrode automation switching system applied to retort, the present embodiment such as Fig. 5, with The difference of embodiment 1 is that electrode uses foam electrode, and transmitter (4) uses foam transmitter, the conditioning agent of retort (1) Storage device (12) is defoamer solution storage tanks, and conditioning agent delivery device (13) is same as Example 2 to use peristaltic pump.Its Remaining part point is same as Example 1.
Electrode, transmitter, retort, peristaltic pump, flow controller, signal projector, PLC used in the utility model The internal structures of the parts such as controller, operation principle, mode of connection, parameter setting, numerical control program editor and its control mode are equal For known technology, also the characteristics of non-the utility model, therefore repeat no more.
Cutting system compatibility is strong automatically for electrode provided by the utility model, and the scope of application is wider, can not only be applicable In the supporting installation of popular response tank and the automatic improving of old-fashioned retort, and to retort, PLC, transmitter, The unit types such as electrode, peristaltic pump, gas flow controller or model limitation can be replaced mutually, and processing is used in pharmaceutical field Cell culture beyond, food, papermaking can also be widely used in, brewage, electroplate, petrochemical industry, the industry such as sewage disposal.

Claims (10)

1. the electrode automatic switchover system of a kind of retort, it is characterised in that the electrode automatic switchover system contains retort (1), primary electrode (2), backup electrode (3), transmitter (4), warning device (5), PLC (6), electric cabinet (7);It is described Primary electrode (2), backup electrode (3) are fixedly arranged in retort (1);
The electric cabinet (7) is respectively equipped with primary electrode switch (71), backup electrode switch (72), transmitter switch (73), report Alarm device switch (74), PLC switch (75), its respectively with primary electrode (2), backup electrode (3), transmitter (4), report Alarm device (5), PLC (6) are electrical connected.
2. electrode automatic switchover system according to claim 1, it is characterised in that the transmitter (4) is dissolved oxygen pick-up Device, PH transmitters or defoaming transmitter, provided with signal receiving end (41) and signal output part (42), its signal receiving end (41) point It is not connected with primary electrode (2), backup electrode (3) by signal wire.
3. electrode automatic switchover system according to claim 1, it is characterised in that the warning device (5) is provided with alarm Lamp (51), emergency alarm bell (52) and information transmitter (53).
4. electrode automatic switchover system according to claim 1, it is characterised in that the PLC (6) is programmable Controller, provided with signal input part (61), signal output part (62) and signal transacting modular converter (63), its signal input part (61) it is connected with transmitter (4) signal output part (42) by signal wire, the letter of signal output part (62) and warning device (5) Breath transmitter (53) is connected by signal wire.
5. electrode automatic switchover system according to claim 1, it is characterised in that the electric cabinet (7) is provided with control electricity Road, it is provided with battery main switch (76), the battery main switch (76) one termination public power, the other end of battery main switch (76) Successively (75), alarm are switched with primary electrode switch (71), backup electrode switch (72), transmitter switch (73), PLC Device switch (74) is connected, the other end and AC relay (7KA1) normally open contact of the primary electrode switch (71) (7KA11) is connected, and the other end of backup electrode switch (72) is connected with AC relay (7KA1) normally closed interlock (7KA12) Connect, AC relay (7KA1) normally open contact (7KA11) other end and AC relay (7KA1) normally closed interlock (7KA12) are another It is connected after end is in parallel with AC relay (7KA1), AC relay (7KA1) other end access PLC (6), the change Send the other end access ground wire of device switch (73), PLC switch (75) other end access PLC (6) zero line L, PLC (6) zero line side N access ground wire, warning device switch (74) and the AC relay being connected in parallel (7KA1) closure contact (7KA13), emergency alarm bell (52) are connected, the other end of the emergency alarm bell (52) successively with alarm lamp (51), AC relay (7KA2) normally open contact (7KA21), AC relay (7KA2) are connected, AC relay (7KA2) it is another Terminate and be connected into PLC (6), AC relay (KA1) normally closed interlock (KA13) other end with signal projector (53) Connect, signal projector (53) other end access ground wire.
6. electrode automatic switchover system according to claim 1, it is characterised in that the electrode is dissolved oxygen electrode, PH electricity Pole or defoaming electrode.
7. electrode automatic switchover system according to claim 1, it is characterised in that the retort (1) is provided with enforcement division Part, its execution unit contain agitator (11), regulation agent storage device (12) and conditioning agent delivery device (13).
8. electrode automatic switchover system according to claim 7, it is characterised in that the agitator (11) is fixedly arranged on reaction In tank (1), the regulation agent storage device (12) is connected with conditioning agent delivery device (13) by pipeline, and the conditioning agent is thrown Device (13) is put by pipeline with retort (1) to be connected.
9. electrode automatic switchover system according to claim 7, it is characterised in that the agitator (11), conditioning agent are thrown Device (13) is put to be connected by signal wire with the signal output part (62) of PLC (6) respectively.
10. electrode automatic switchover system according to claim 7, it is characterised in that it is described regulation storage device (12) be PH value conditioning agent holding vessel, clean compressed air generating means, oxygen storage tank, one kind or more of defoamer solution storage tanks Kind, its conditioning agent delivery device (13) is peristaltic pump Huo and gas flow controller.
CN201720320102.0U 2017-03-29 2017-03-29 A kind of electrode automatic switchover system of retort Active CN206838049U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720320102.0U CN206838049U (en) 2017-03-29 2017-03-29 A kind of electrode automatic switchover system of retort

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720320102.0U CN206838049U (en) 2017-03-29 2017-03-29 A kind of electrode automatic switchover system of retort

Publications (1)

Publication Number Publication Date
CN206838049U true CN206838049U (en) 2018-01-05

Family

ID=60791939

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720320102.0U Active CN206838049U (en) 2017-03-29 2017-03-29 A kind of electrode automatic switchover system of retort

Country Status (1)

Country Link
CN (1) CN206838049U (en)

Similar Documents

Publication Publication Date Title
CN101560741B (en) Method for controlling flow of transmission control system of paper machine
CN204570911U (en) Power station maintenance collecting well drainage control system
CN206838049U (en) A kind of electrode automatic switchover system of retort
CN201786623U (en) Primary sintering deoxidization pump station automatic early warning system
CN202370808U (en) Vacuum automation control system
CN105573113B (en) A kind of digital collecting accepted way of doing sth redundancy control system
CN202848885U (en) Automatic correction system for big-wheeled machine of gantry crane
CN213631637U (en) Air compressor centralized monitoring device of submerged arc furnace dust removal system
CN209324630U (en) A kind of control system of water pump
CN209625059U (en) Water pump perseverance automatic Control Systems of Liquids Height
CN109224322B (en) Vacuum control system applied to proton treatment device
CN202834760U (en) Full-automatic bus-bar for inert gases
CN212167830U (en) Safety control system of horizontal spiral centrifuge
CN206665582U (en) The control device of wireless of thermal power plant car dumper system
CN207056011U (en) One kind extraction interlock control apparatus
CN221155545U (en) Queuing and discharging system for multiple filter presses based on relay control
CN212302275U (en) Power plant water supply main pipe network control system
CN208094276U (en) A kind of PLC that can switch online UPS power supply control apparatus
CN104624117A (en) Passive automatic detection system and method for stirring production line
CN204287886U (en) A kind of air compressor machine remote monitoring and control device
CN212484144U (en) Automatic control system for rapping of discharge opening of production line
CN104801808B (en) A kind of copper solder automatic charging device
CN110647095A (en) Sewage and wastewater intelligent control cabinet
CN203883736U (en) Circuit control system of motor
CN214151956U (en) Voice alarm circuit structure of television transmitter

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant