CN106987918A - A kind of composite spinning measures apparatus for controlling pump - Google Patents

A kind of composite spinning measures apparatus for controlling pump Download PDF

Info

Publication number
CN106987918A
CN106987918A CN201710270393.1A CN201710270393A CN106987918A CN 106987918 A CN106987918 A CN 106987918A CN 201710270393 A CN201710270393 A CN 201710270393A CN 106987918 A CN106987918 A CN 106987918A
Authority
CN
China
Prior art keywords
switch
pump
control unit
auxiliary
relay
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.)
Granted
Application number
CN201710270393.1A
Other languages
Chinese (zh)
Other versions
CN106987918B (en
Inventor
林荣志
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.)
Xiamen Xiangyu Wang Xing Special Material Co Ltd
Original Assignee
Xiamen Xiangyu Wang Xing Special Material 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 Xiamen Xiangyu Wang Xing Special Material Co Ltd filed Critical Xiamen Xiangyu Wang Xing Special Material Co Ltd
Priority to CN201710270393.1A priority Critical patent/CN106987918B/en
Publication of CN106987918A publication Critical patent/CN106987918A/en
Application granted granted Critical
Publication of CN106987918B publication Critical patent/CN106987918B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/28Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30Conjugate filaments; Spinnerette packs therefor
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00Treatment of filament-forming or like material
    • D01D1/06Feeding liquid to the spinning head

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

Apparatus for controlling pump, including main pump control unit, auxiliary pump control unit, control circuit are measured the present invention relates to a kind of composite spinning;Described control unit includes frequency converter, measuring pump, auxiliary reclay;The frequency converter connects three phase mains, and output end connects the measuring pump;The common port of the auxiliary reclay and normally opened end are series between the S1 of the frequency converter and SC;The control circuit includes alarm module, relay control module;The relay control module is used for the folding for controlling the auxiliary reclay;The alarm module cuts off the power end of the relay control module, the measuring pump is stopped, so as to avoid producing single composition polymer spinning when described control unit breaks down.

Description

A kind of composite spinning measures apparatus for controlling pump
Technical field
The present invention relates to electric field, more particularly to a kind of composite spinning metering apparatus for controlling pump.
Background technology
Composite spinning is each controlled respectively again after two or more polymer is carried out into pre-crystallized, drying respectively Screw extruder in melting extrusion, filtering, metering, send into spinning manifold.Spinning measuring process is controlled respectively using frequency converter Measuring pump processed, so as to control the content ratio of each group polymer, exists according to respective path respectively through filter, distribution plate etc. Converge and be formed with the multifilament of single fiber composition at shower nozzle aperture.If the meter of one of which polymer in spinning production process Amount pump control unit breaks down and not worked, and will produce single composition or lack the polymer spinning of a certain composition and does not conform to Lattice product.
The content of the invention
It is an object of the invention to the shortcoming for overcoming prior art, there is provided a kind of composite spinning metering apparatus for controlling pump.
In order to solve the above technical problems, present invention employs following technical measures:
A kind of composite spinning measures apparatus for controlling pump, including main pump control unit, auxiliary pump control unit, control circuit;Institute State main pump control unit and the auxiliary pump control unit includes frequency converter, measuring pump, auxiliary reclay respectively;The frequency converter connects Three phase mains is connect, output end connects the measuring pump, power supply is provided for it;The common port of the auxiliary reclay and normally opened end string It is coupled between operation the input S1 and SC of the frequency converter;The control circuit includes alarm module, relay control module; The relay control module is used for the folding for controlling the auxiliary reclay;The alarm module includes alarm relay, phase Mutual main pump alarm switch and auxiliary pump alarm switch in parallel;The alarm relay is normally closed relay;The alarm relay Normal-closed end connection positive source and the main pump alarm switch first end, common port connects the relay control module Power end, first coil end connects the second end of the main pump alarm switch, the second coil-end connection power cathode;The main pump When control unit breaks down, main pump alarm switch adhesive described in connected Frequency Converter Control;The auxiliary pump control unit During failure, auxiliary pump alarm switch adhesive described in connected Frequency Converter Control;The main pump alarm switch or the pair Pump alarm switch adhesive, makes the alarm relay be powered and disconnects, while controlling the main pump control unit and the auxiliary pump control The measuring pump of unit processed is stopped.
As a further improvement, the relay control module includes the first control loop and the second control loop;It is described First control loop is used for the folding for controlling the auxiliary reclay of the main pump control unit;Second control loop is used to control Make the folding of the auxiliary reclay of the auxiliary pump control unit.
As a further improvement, first control loop includes first switch, second switch;The first switch, The coil of two switches and the auxiliary reclay of the main pump control unit be sequentially connected in series common port in the alarm relay with Between power cathode;The common port of the auxiliary reclay of the main pump control unit and normally opened end are parallel to the first switch two End;Second control loop includes the 3rd switch, the 4th switch;3rd switch, the 4th switch and auxiliary pump control The coil of the auxiliary reclay of unit be sequentially connected in series the end points and power cathode connected with second switch in the first switch it Between;The first switch and the 3rd switch are normally opened contact, and the second switch and the 4th switch are normally-closed contact.
As a further improvement, also including transformer, export and provided to the control circuit after connection single phase poaer supply transformation Power supply.
As a further improvement, also including first fuse, the output end of the transformer is series at.
As a further improvement, also including second fuse, the input of the transformer is series at.
As a further improvement, the auxiliary reclay is HH54P-FL 24V/AC.
As a further improvement, the frequency converter is VS-606V7.
Compared with prior art, the present invention has advantages below:Technical scheme is using the side for interlocking cross complaint Formula, as long as one of which measuring pump control unit breaks down, will warning output, other Sets of Measurement pump control units can also stop Only work, can prevent to produce single composition or lack the polymer spinning of a certain composition, it is to avoid substandard product comes into the market Cause customer complaint.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, the reality with the present invention Apply example to be used for explaining the present invention together, be not construed as limiting the invention.
Accompanying drawing 1 is the circuit theory diagrams of one embodiment of the present of invention.
Main element symbol description
Main pump control unit 100
Auxiliary pump control unit 200
Control circuit 300
Transformer 400
First control loop 311
Second control loop 312
The power end 313 of relay control module
Embodiment
To make the purpose, technical scheme and advantage of embodiment of the present invention clearer, below in conjunction with present invention implementation Accompanying drawing in mode, the technical scheme in embodiment of the present invention is clearly and completely described.
In the description of the invention, it is necessary to illustrate, herein, such as first and second or the like relational terms It is used merely to make a distinction an entity or operation with another entity or operation, and not necessarily requires or imply these There is any this actual relation or order between entity or operation.Moreover, term " comprising ", "comprising" or its is any Other variants are intended to including for nonexcludability, so that process, method, article or equipment including a series of key elements Not only include those key elements, but also other key elements including being not expressly set out, or also include being this process, side Method, article or the intrinsic key element of equipment.In the absence of more restrictions.By sentence, " including one ... limits Key element, it is not excluded that also there is other identical element in the process including the key element, method, article or equipment ".
The correlation module being related in the system is hardware system module or is prior art Computer Software journey The functional module that sequence or agreement are combined with hardware, computer software programs or agreement involved by the functional module itself The technology being well known to those skilled in the art, it is not the improvements of the system;The system is improved between each module Interaction relationship or annexation, be that the overall construction of system is improved, to be solved with solving the system Relevant art problem.
Below in conjunction with drawings and embodiments is made to a kind of composite spinning metering apparatus for controlling pump of the present invention specific be situated between Continue.
Referring to Fig. 1, a kind of composite spinning metering apparatus for controlling pump, including main pump control unit 100, auxiliary pump control unit 200th, circuit 300 is controlled;The main pump control unit 100 and the auxiliary pump control unit 200 include frequency converter, metering respectively Pump, auxiliary reclay;Three phase mains pin R, S, T of the frequency converter connect three phase mains, three-phase output end U, V, W difference respectively The three-phase power input end of the measuring pump is connected, power supply is provided for it;The common port of the auxiliary reclay and normally opened end string It is coupled between operation the input S1 and SC of the frequency converter, when the auxiliary reclay adhesive, then the Frequency Converter Control is defeated Go out three phase mains and provide power supply for the measuring pump.In the present embodiment, it is preferred that the auxiliary reclay is HH54P-FL24V/ AC, the frequency converter is VS-606V7.
The control circuit 300 includes alarm module, relay control module;The relay control module is used to control The folding of the auxiliary reclay, so as to control the work of the measuring pump;The alarm module includes alarm relay J3, phase Mutual main pump alarm switch K5 and auxiliary pump alarm switch K6 in parallel;The alarm relay J3 is normally closed relay;The alarm Relay J3 normal-closed end connection positive source and the first end of the main pump alarm switch K5, common port connects the relay The power end 313 of control module, first coil end connects the second end of the main pump alarm switch K5, the second coil-end connection electricity Source negative pole.
When the main pump control unit 100 breaks down, main pump alarm switch K5 described in connected Frequency Converter Control Adhesive, the alarm relay J3 energizations disconnection is that the power end 313 of the relay control module and power supply disconnect stopping work Make;When the auxiliary pump control unit 200 breaks down, auxiliary pump alarm switch K6 adhesives described in connected Frequency Converter Control, The alarm relay J3 energizations disconnection is that the power end 313 of the relay control module and power supply disconnection are stopped.With On, warning output, the relay control as long as the main pump control unit 100 or the auxiliary pump control unit 200 break down The power end 313 of molding block disconnects with power supply to be stopped, i.e., described main pump control unit 100 and the auxiliary pump control unit 200 are stopped, it is to avoid produce single composition polymer spinning.
Further, in preferred embodiments of the present invention, the relay control module includes the first control loop 311 And second control loop 312;First control loop 311 is used for the auxiliary reclay for controlling the main pump control unit 100 J1 folding, so as to control the work of main pump control unit 100 output;Second control loop 312 is described for controlling The auxiliary reclay J2 of auxiliary pump control unit 200 folding, so as to control the work of auxiliary pump control unit 200 output.At this In embodiment, because production technology needs first to start the measuring pump M1 of the main pump control unit 100, startup could be followed described The measuring pump M2 of auxiliary pump control unit 200;The measuring pump M1 of the main pump control unit 100 is stopped, the auxiliary pump control The measuring pump M2 of unit 200 is also and then stopped.Based on above demand, it is preferred that first control loop 311 includes the One switch K1, second switch K2;The first switch K1, second switch K2 and the main pump control unit 100 middle relay Device J1 coil JX1 is sequentially connected in series between the common port and power cathode of the alarm relay J3;The main pump control is single The auxiliary reclay J1 of member 100 common port and normally opened end are parallel to the first switch K1 two ends;Second control loop 312 include the 3rd switch K3, the 4th switch K4;Described 3rd switchs K3, the 4th switch K4 and the auxiliary pump control unit 200 Auxiliary reclay J2 coil JX2 is sequentially connected in series in the first switch K1 and the second switch K2 end points connected and power cathode Between;The first switch K1 and the 3rd switch K3 are normally opened contact, the second switch K2 and the 4th switch K4 For normally-closed contact.Opened when it is implemented, needing just to press described first when starting the measuring pump M1 of the main pump control unit 100 K1 is closed, the auxiliary reclay J1 of the main pump control unit 100 coil JX1 is powered, the centre of the main pump control unit 100 Relay J1 adhesive self-lockings, the frequency converter Q1 of the main pump control unit 100 starts and out-put supply controls list for the main pump The measuring pump M1 work of member 100.When needing to start the measuring pump M2 of the auxiliary pump control unit 200, that must be in the main pump In the case that the measuring pump M1 of control unit 100 starts, the 3rd switch K3 is pressed, at this moment can just make the auxiliary pump control single The auxiliary reclay J2 of member 200 coil JX2 is powered, the auxiliary reclay J2 adhesive self-lockings of the auxiliary pump control unit 200, institute The frequency converter Q2 for stating auxiliary pump control unit 200 starts simultaneously measuring pump M2 work of the out-put supply for the auxiliary pump control unit 200. When the main pump control unit 100 needs to be stopped, disconnect the second switch K2, the main pump control unit 100 Auxiliary reclay J1 power-off disconnects, and then the measuring pump M1 of the main pump control unit 100 is stopped, now, the auxiliary pump The auxiliary reclay J2 of control unit 200 also disconnects because of power-off to be stopped.
Further, in preferred embodiments of the present invention, in addition to transformer 400, connect defeated after single phase poaer supply transformation Go out and provided to the control circuit 300 in power supply, the present embodiment, the transformer 400 uses 220V/24V.
Further, in preferred embodiments of the present invention, in addition to first fuse F1 and second fuse F2, respectively It is series at the output end and input of the transformer 400.
A kind of composite spinning in accordance with the above measures the control method of apparatus for controlling pump, comprises the following steps:
S1, presses the switches of first switch K1 and the 3rd K3;
The auxiliary reclay energization adhesive of S2, the main pump control unit 100 and the auxiliary pump control unit 200;
The Frequency Converter Control output of S3, the main pump control unit 100 and the auxiliary pump control unit 200, corresponding institute Measuring pump is stated to work on power;
S4, when the measuring pump M1 of the main pump control unit 100 breaks down, connected frequency converter Q1 controls institute Main pump alarm switch K5 adhesives are stated, into step S6;
S5, when the measuring pump M2 of the auxiliary pump control unit 200 breaks down, connected frequency converter Q2 controls institute State auxiliary pump alarm switch K6 adhesives;
S6, the alarm relay J3, which are powered, to be disconnected;
S7, the power end 313 of the relay control module disconnects, first control loop 311 and second control Loop 312 processed is stopped, and the measuring pump of the main pump control unit 100 and the auxiliary pump control unit 200 is stopped;
S8, when the measuring pump M1 for needing to make the main pump control unit 100 is stopped, presses the second switch K2, the auxiliary reclay J1 power-off open circuits of the main pump control unit 100;The measuring pump M1 of the main pump control unit 100 stops Only work;
S9, when the measuring pump M2 for needing to make the auxiliary pump control unit 200 is stopped, presses the 4th switch K4, the auxiliary reclay J2 power-off open circuits of the auxiliary pump control unit 200;The measuring pump M2 of the auxiliary pump control unit 200 stops Only work.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.

Claims (8)

1. a kind of composite spinning measures apparatus for controlling pump, it is characterised in that including main pump control unit, auxiliary pump control unit, control Circuit processed;
The main pump control unit and the auxiliary pump control unit include frequency converter, measuring pump, auxiliary reclay respectively;It is described to become Frequency device connects three phase mains, and output end connects the measuring pump, power supply is provided for it;The common port of the auxiliary reclay and often Beginning is series between operation the input S1 and SC of the frequency converter;
The control circuit includes alarm module, relay control module;The relay control module be used for control it is described in Between relay folding;
The alarm module includes alarm relay, main pump alarm switch and auxiliary pump alarm switch parallel with one another;The alarm Relay is normally closed relay;
The normal-closed end connection positive source and the first end of the main pump alarm switch of the alarm relay, common port connection institute The power end of relay control module is stated, first coil end connects the second end of the main pump alarm switch, and the second coil-end connects Connect power cathode;
When the main pump control unit breaks down, main pump alarm switch adhesive described in connected Frequency Converter Control;It is described When auxiliary pump control unit breaks down, auxiliary pump alarm switch adhesive described in connected Frequency Converter Control;The main pump alarm Switch or the auxiliary pump alarm switch adhesive, make the alarm relay be powered and disconnect, while controlling the main pump control unit And the measuring pump of the auxiliary pump control unit is stopped.
2. composite spinning according to claim 1 measures apparatus for controlling pump, it is characterised in that the relay control module Including the first control loop and the second control loop;First control loop is used for the centre for controlling the main pump control unit The folding of relay;Second control loop is used for the folding for controlling the auxiliary reclay of the auxiliary pump control unit.
3. composite spinning according to claim 2 measures apparatus for controlling pump, it is characterised in that the first control loop bag Include first switch, second switch;The coil of the auxiliary reclay of the first switch, second switch and the main pump control unit It is sequentially connected in series between the common port and power cathode of the alarm relay;The auxiliary reclay of the main pump control unit Common port and normally opened end are parallel to the first switch two ends;
Second control loop includes the 3rd switch, the 4th switch;3rd switch, the 4th switch and auxiliary pump control The coil of the auxiliary reclay of unit be sequentially connected in series the end points and power cathode connected with second switch in the first switch it Between;The first switch and the 3rd switch are normally opened contact, and the second switch and the 4th switch are normally-closed contact.
4. composite spinning according to claim 1 measures apparatus for controlling pump, it is characterised in that also including transformer, connection Exported after single phase poaer supply transformation and provide power supply to the control circuit.
5. composite spinning according to claim 4 measures apparatus for controlling pump, it is characterised in that also including first fuse, It is series at the output end of the transformer.
6. composite spinning according to claim 4 measures apparatus for controlling pump, it is characterised in that also including second fuse, It is series at the input of the transformer.
7. composite spinning according to claim 1 measures apparatus for controlling pump, it is characterised in that the auxiliary reclay is HH54P-FL 24V/AC。
8. composite spinning according to claim 1 measures apparatus for controlling pump, it is characterised in that the frequency converter is VS- 606V7。
CN201710270393.1A 2017-04-24 2017-04-24 Composite spinning metering pump control device Active CN106987918B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710270393.1A CN106987918B (en) 2017-04-24 2017-04-24 Composite spinning metering pump control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710270393.1A CN106987918B (en) 2017-04-24 2017-04-24 Composite spinning metering pump control device

Publications (2)

Publication Number Publication Date
CN106987918A true CN106987918A (en) 2017-07-28
CN106987918B CN106987918B (en) 2022-10-14

Family

ID=59417841

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710270393.1A Active CN106987918B (en) 2017-04-24 2017-04-24 Composite spinning metering pump control device

Country Status (1)

Country Link
CN (1) CN106987918B (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1204339A (en) * 1967-12-06 1970-09-03 Schwarza Chemiefaser Apparatus for melt spinning composite filaments
CN201305670Y (en) * 2008-10-20 2009-09-09 桐乡市中维化纤有限公司 Control device for fully-drawn yarn metering pump
CN201386148Y (en) * 2009-03-05 2010-01-20 江阴博伦化纤有限公司 Single-spinning position variable frequency control device for spinning machine metering pump
CN101818413A (en) * 2010-03-18 2010-09-01 吉安市三江超纤无纺有限公司 Manufacturing method and device for two-component hollow spun-bonded spunlace non-woven fabrics
CN201762487U (en) * 2010-08-19 2011-03-16 郑睿敏 Drive control system of spinning machine
CN201877826U (en) * 2010-11-02 2011-06-22 北京三联虹普新合纤技术服务股份有限公司 System for controlling speed fluctuation of frequency converter
CN103488119A (en) * 2013-10-14 2014-01-01 江苏长乐纤维科技有限公司 Control method for preventing POY (Pre-Oriented Yarn) fineness from generating midway variation
CN204349855U (en) * 2015-01-30 2015-05-20 欧瑞康纺织有限及两合公司 Spinning measuring pump control system and spinning equipment
CN204476712U (en) * 2015-01-08 2015-07-15 南京南汽畅通公路机械有限公司 Control two control gear on a kind of power supply pump truck
CN204761363U (en) * 2015-07-03 2015-11-11 江门市华睦五金有限公司 Can supply automatic frequency conversion constant voltage control system of cooling tower of two sets of unit sharings
CN204945700U (en) * 2015-07-30 2016-01-06 苏州热工研究院有限公司 A kind of dosing defoaming system
CN206814890U (en) * 2017-04-24 2017-12-29 厦门象屿兴泓特种材料有限公司 A kind of composite spinning measures apparatus for controlling pump

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1204339A (en) * 1967-12-06 1970-09-03 Schwarza Chemiefaser Apparatus for melt spinning composite filaments
CN201305670Y (en) * 2008-10-20 2009-09-09 桐乡市中维化纤有限公司 Control device for fully-drawn yarn metering pump
CN201386148Y (en) * 2009-03-05 2010-01-20 江阴博伦化纤有限公司 Single-spinning position variable frequency control device for spinning machine metering pump
CN101818413A (en) * 2010-03-18 2010-09-01 吉安市三江超纤无纺有限公司 Manufacturing method and device for two-component hollow spun-bonded spunlace non-woven fabrics
CN201762487U (en) * 2010-08-19 2011-03-16 郑睿敏 Drive control system of spinning machine
CN201877826U (en) * 2010-11-02 2011-06-22 北京三联虹普新合纤技术服务股份有限公司 System for controlling speed fluctuation of frequency converter
CN103488119A (en) * 2013-10-14 2014-01-01 江苏长乐纤维科技有限公司 Control method for preventing POY (Pre-Oriented Yarn) fineness from generating midway variation
CN204476712U (en) * 2015-01-08 2015-07-15 南京南汽畅通公路机械有限公司 Control two control gear on a kind of power supply pump truck
CN204349855U (en) * 2015-01-30 2015-05-20 欧瑞康纺织有限及两合公司 Spinning measuring pump control system and spinning equipment
CN204761363U (en) * 2015-07-03 2015-11-11 江门市华睦五金有限公司 Can supply automatic frequency conversion constant voltage control system of cooling tower of two sets of unit sharings
CN204945700U (en) * 2015-07-30 2016-01-06 苏州热工研究院有限公司 A kind of dosing defoaming system
CN206814890U (en) * 2017-04-24 2017-12-29 厦门象屿兴泓特种材料有限公司 A kind of composite spinning measures apparatus for controlling pump

Also Published As

Publication number Publication date
CN106987918B (en) 2022-10-14

Similar Documents

Publication Publication Date Title
CN204556692U (en) Multiple way electric metering junction box
CN206814890U (en) A kind of composite spinning measures apparatus for controlling pump
CN206002663U (en) A kind of comprehensive test system being applied to many motors
CN106340953A (en) Dual-supply automatic transfer switch
CN105846477A (en) Battery power supply device
CN206721396U (en) A kind of composite spinning measures apparatus for controlling pump
CN106987918A (en) A kind of composite spinning measures apparatus for controlling pump
CN104393667B (en) Portable power supply switching device
CN207868819U (en) Power control circuit and system
CN208508520U (en) Discharge circuit, drive plate, controller and air conditioner
CN109510193A (en) A kind of distribution switchyard segmentation backup auto-activating device and its operation method
CN204390076U (en) A kind of tank car cryopump band GPS fixed point unloads the control box of liquid device
CN205333831U (en) Experimental loading system of welding source
CN207014737U (en) A kind of automatic heating control device and injection machine
CN207782382U (en) A kind of elevator internal contracting brake power supply
CN102684543A (en) 350W small power modular H inverter bridge cascade stage solar inverter system
CN206894358U (en) A kind of intelligent AC screen circuit structure
CN206820639U (en) A kind of high-pressure frequency-conversion auto by pass cabinet
CN207200366U (en) The operating circuit of electricity-saving appliance
CN107234796A (en) A kind of extruder protection device of plastic sheeting recovery system and its guard method
CN205910523U (en) Intelligence meeting center control system
CN205385291U (en) Reactive compensation controller of control blend switch
CN207156429U (en) A kind of extruder protection device of plastic sheeting recovery system
CN205263532U (en) Quick -witted special energy -saving control ware of silk is received to plastics
CN205791479U (en) A kind of pitch-controlled system power supply overvoltage protection device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant