CN208814866U - Scraper control system and pre- hanging filter with the scraper control system - Google Patents
Scraper control system and pre- hanging filter with the scraper control system Download PDFInfo
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- CN208814866U CN208814866U CN201821545735.2U CN201821545735U CN208814866U CN 208814866 U CN208814866 U CN 208814866U CN 201821545735 U CN201821545735 U CN 201821545735U CN 208814866 U CN208814866 U CN 208814866U
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Abstract
The utility model relates to a kind of scraper control systems, for controlling relative motion of the scraper base in pre- hanging filter relative to pre-hung layer, it include: first motor and the second motor, the first motor and second motor pass through retarder respectively and are connected with one end of the scraper base, to drive scraper base to move；First frequency converter, first frequency converter are connect with the first motor signal to control the revolving speed of the first motor and steering；Second frequency converter, second frequency converter are connect to control the revolving speed of second motor and steering with second motor signal；Controller, the controller is provided for controlling the revolving speed of the first motor and second motor and the working signal of steering to first frequency converter, and receive the frequency converter feedback signal from first frequency converter and the second frequency converter, to monitor the operating status of the first motor and second motor, the utility model further relates to a kind of pre- hanging filter.
Description
Technical field
The utility model relates to a kind of scraper control systems of pre- hanging filter, make more particularly, to one kind for slurrying
The scraper control system of the filter plant of washing and the concentration of paper plant's alkali collection workshop green mud or white clay.
Background technique
Pre- hanging filter is mainly used for the washing and concentration of pulping and paper-making alkali collection caustic room white clay and green mud, and
The industries such as chemical industry, medicine, mine, food carry out material washing and separation of solid and liquid.It is domestic using used in pre- hanging filter at present
Scraper generally uses ordinary motor positive and negative rotation by multistage speed reducer deceleration scraper fast forward and fast rewind, or passes through two sets of transmissions
System realizes the slow-motion and rewind of scraper, the former has that pre-hung layer is seriously polluted, interval time is short for replacement, blanking mass dryness fraction is small and not
Stablize, the disadvantage that production capacity is low, the latter has the shortcomings that be driven complicated, at high cost, poor reliability.
Chinese patent CN201250162Y, entitled green mud pre-suspension formula filter scraper driving device, what is be related to scrapes
Knife transmission device improves above two system, and slow-motion and rewind transmission system are combined into one, and uses a servo electricity
Machine slows down by planetary reducer and worm-gear speed reducer, drives scraper to retreat by feed screw nut.
The technical solution referred in Chinese patent 201250162Y is to be subtracted by the both ends of synchronous drive shaft with worm and gear
Fast device transmission connection, wherein a worm type of reduction gearing is connect with planetary reducer and motor drive, the purpose is to logical
The connection for crossing synchronous drive shaft makes the synchronous working of two retarders, but due to mechanical processing technique, two decelerations
Device is the synchronization for being unable to reach 100% by mechanical connection, especially have passed through the operation of a period of time, the machines such as transmission shaft
A degree of abrasion occurs for tool equipment, and the synchronous effect of speed reducer can be deteriorated, while these mechanical parts are also to a certain degree
Under increase the operating cost and maintenance cost of equipment.
By taking the dregs precoat filter of pulping and paper-making caustic room as an example, the equipment of the type is the benefit using white clay as pre-hung layer
White clay is adsorbed on drum surface with the effect of negative pressure and forms pre-hung layer, after pre-hung layer is formed, stops white clay feeding, is changed to green mud
Charging, then green mud can be dehydrated by acting on the white clay pre-hung layer for be adsorbed on rotary drum for negative pressure.
In the process of running, by the automation control to scraper moving direction and speed, filtering discharging, pre-hung layer are realized
Blowback cleaning, updates the circulation of pre-hung layer quasi-periodic.
During the filtration process, scraper slowly at the uniform velocity advances, and peels off since initial position (outside limit-switch positions) pre-
Hang layer, with rotary drum to scraper side rotate, scraper, which will be slow, scrapes off pre-hung layer outer section, make pre-hung layer during filtering always
Keep optimal filtration condition.
When scraper reach inner side limiting-position switch at, scraper rapid backward to initial position, by blowback and cleaning, again to
Groove body feeding white clay forms new pre-hung layer, into the new cycle of operation, therefore, the automation control pair of advanced doctor blade system
The stable operation of whole equipment is most important.
The both ends of scraper device should be run simultaneously as far as possible, to keep bridging on rotary drum uniform, the mass dryness fraction of discharging is stablized.Machine
The scraper kind of drive of tool mode is to be connect by a motor with planetary reducer, each side has a planet in scraper
Speed reducer and a worm-gear speed reducer realize synchronization action by passing through a transmission shaft of scraper base, in practical fortune
In row, the transmission device mechanically connected, worm speed-down chance slightly lags a bit than planetary reducer, with using
The increase of time, transmission shaft can generate abrasion, and the synchronous effect between two speed reducers can worse and worse, and transmission shaft conduct
Wear-out part will increase plant maintenance.
Summary of the invention
Defect against the above technical problems, the purpose of this utility model is to provide one kind can save equipment operation dimension
Protect cost, and the filter scraper control system that energy long-time stable is precisely run.
Technical problem to be solved in the utility model is to provide a kind of scraper control system first, the scraper control system
For controlling relative motion of the scraper base in pre- hanging filter relative to pre-hung layer, which includes: first
Motor and the second motor, the first motor and second motor pass through one end phase of the retarder with the scraper base respectively
Even, to drive scraper base to move；First frequency converter, first frequency converter are connect to control described with the first motor signal
The revolving speed of one motor and steering；Second frequency converter, second frequency converter are connect to control described with second motor signal
The revolving speed of two motors and steering；Controller, the controller are provided for controlling the first motor and second motor
Revolving speed and the working signal of steering give first frequency converter, and receive the change from first frequency converter and the second frequency converter
Frequency device feedback signal, to monitor the operating status of the first motor and second motor.
According to a kind of preferred implementing form of scraper control system provided by the utility model, first frequency converter and institute
It states the second frequency converter to be designed to directly be connected with the controller in a signal way. respectively, receives identical work letter from the controller
Number, to make the first motor and the second motor synchronous rotary and starting/stopping under the control of identical working signal.This
When, it is the operation of two motors and two retarders that scraper control system is equipped with, two frequency conversions using two Frequency Converter Controls
Device receives such as control signal from DCS simultaneously, without master-slave.
It is however also possible to be primary transducer by the first Design of Inverter, the second Design of Inverter is from frequency converter.In this way,
In a kind of preferred implementing form according to scraper control system provided by the utility model, the first frequency converter is designed to be suitable
Receive controller issue working signal simultaneously working signal is transferred to second frequency converter, thus make the first motor and
Second motor synchronous rotary and starting/stopping under the control of identical working signal.It at this moment can be by being become with master/slave two
The frequency device control revolving speed of motor, direction control the operation of scraper base, and the external control signal to come from such as DCS is transmitted only to
Primary transducer, primary transducer transmits a signal to again to be achieved the purpose that control another motor from frequency converter, can also be made in this way
The operation of two motors is in synchronous regime.
Preferably, according to scraper control system provided by the utility model further include: limit switch, the limit switch
Corresponding preset limit position is moved to for detecting whether scraper base has been moved to corresponding preset limit position, and in scraper base
Limit switch feedback signal is provided to controller when setting, wherein the controller is after receiving the limit switch feedback signal
The signal for stopping corresponding motor being issued to corresponding frequency converter.
Preferably, the first motor and second motor are servo motor.
In addition, technical problem to be solved in the utility model, which also resides in, provides a kind of pre- hanging filter, the pre-hung
Formula filter includes scraper control system as described above.
Compared with prior art, the scraper control system of pre- hanging filter provided by the utility model uses two electricity
The synchronously control of machine eliminates the complicated machinery synchronous transmission device between the driving device at scraper base both ends, not only saves
Equipment operation maintenance cost, improve the stability and accuracy of equipment operation, while the life cycle of equipment operation is also
It is improved to effective.The slow forward fast backward of motor and retarder realization scraper can be directly controlled by controlling frequency converter.
Detailed description of the invention
Fig. 1 schematically illustrates the first embodiment of the scraper control system of pre- hanging filter according to the present utility model
Schematic diagram；
Fig. 2 schematically illustrates the second embodiment of the scraper control system of pre- hanging filter according to the present utility model
Schematic diagram；
Fig. 3 schematically illustrates the structural representation of the scraper control system of pre- hanging filter according to the present utility model
Figure；
Fig. 4 is the side sectional view of pre- hanging filter signal.
Specific embodiment
The scraper control system 101 of the pre- hanging filter 100 of the utility model is carried out specifically with reference to the accompanying drawing
It is bright, it is emphasized that, drawings and examples are only used for the explanation to the utility model, should not be understood as to the utility model
Limitation.
Fig. 1 schematically illustrates the first of the scraper control system 101 of pre- hanging filter 100 according to the present utility model
The schematic diagram of embodiment, as shown, the scraper control system of the pre- hanging filter 100 of the utility model includes: the first electricity
Machine 104 and the second motor 105, are for example, servo motor, and first motor 104 and the second motor 105 pass through retarder 106 respectively
It is connected with one end of scraper base 102, to drive scraper base 102 to move；First frequency converter 107, first frequency converter and the first electricity
104 signal of machine is connected to control revolving speed and the steering of first motor 104；Second frequency converter 108, second frequency converter and the second electricity
105 signal of machine is connected to control revolving speed and the steering of the second motor 105；Controller 109, controller 109 are provided for controlling the
The working signal of the revolving speed and steering of one motor 104 and the second motor 105 gives the first frequency converter 107, and the first frequency converter 107 receives
Working signal is simultaneously transferred to the second frequency converter 108 by the working signal of the sending of controller 109, in this way, first motor 104 and second
Motor 105 just synchronous rotary and starting/stopping under the control of identical working signal.Meanwhile controller 109 is received from the
The frequency converter feedback signal of one frequency converter 107 and the second frequency converter 108, to monitor the first motor 104 and described second
The operating status of motor 105.
Fig. 2 schematically illustrates the second reality of the scraper control system of pre- hanging filter 100 according to the present utility model
Apply the schematic diagram of example.As shown, the implementation of the scraper control system 101 in the pre- hanging filter 100 of the utility model
In example, which includes: first motor 104 and the second motor 105, and first motor 104 and the second motor 105 are distinguished
It is connected by retarder 106 with one end of scraper base 102, to drive scraper base 102 to move；First frequency converter 107, first change
Frequency device 107 is connect with 104 signal of first motor to control the revolving speed of first motor 104 and steering；Second frequency converter 108, this
Two frequency converters are connect to control the revolving speed of the second motor 105 and steering with 105 signal of the second motor；Controller 109, controller
109 are provided for controlling the revolving speed of first motor 104 and the second motor 105 and the working signal of steering to the first frequency converter 107.
The difference is that, the second frequency converter 108 is directly connect with 109 signal of controller with previous embodiment, thus directly from control
Device 109 processed receives working signal identical with the working signal for being sent to the first frequency converter 107, in this way, first motor 104 and the
Two motors 105 just synchronous rotary and starting/stopping under the control of identical working signal.Meanwhile the reception of controller 109 comes from
The frequency converter feedback signal of first frequency converter 107 and the second frequency converter 108, to monitor the first motor 104 and described
The operating status of two motors 105.
Limit switch 110 is also shown in Fig. 1 and embodiment shown in Fig. 2.Each motor is equipped with inner side and outer side limit
Bit switch moves to phase for detecting whether scraper base 102 has been moved to corresponding preset limit position, and in scraper base 102
Limit switch feedback signal is provided to controller 109 when the preset limit position answered, wherein controller 109 is opened receiving limit
The signal for making corresponding motor stopping is issued to corresponding frequency converter after closing feedback signal.
Fig. 3 schematically illustrates the structure of the scraper control system 101 of pre- hanging filter 100 according to the present utility model
Schematic diagram.Scraper control system 101 is by scraper base 102, first motor 104, the second motor 105 and two 106 groups of speed reducer
At motor passes through speed reducer respectively and is connected with 102 two sides of scraper base, to drive scraper base 102.Utilize motor or servo motor
It realizes frequent start-stop and positive and negative rotation, the characteristic of output revolving speed can be controlled by controlling the impulse waveform of input current, realized
Scraper is advanced with pre-hung layer 103 of the extremely slow speed on pre- hanging filter 100 and is retreated with fast speed, so as to change
Into the working method of pre- hanging filter 100.
Since two motors for driving the both ends of scraper base 102 keep synchronous operation by synchronous frequency converter, scrape
The speed of service at knife both ends also keeps synchronous, thus the operation of scraper keeps stablizing, while entire 103 thickness of pre-hung layer also compares
Uniformly, the scraper uniform force on scraper base 102 reduces the maintenance cost of equipment to reduce the inordinate wear of scraper.
Compared with mechanical synchronization mode, the side of speed reducer is driven using two motors of principal and subordinate's frequency converter synchronously control or so
Case realizes synchronization due to the autocontrol mode used, and there is no worm speed-down chances slightly to lag a bit than planetary reducer
Problem, thus synchronous effect will not be deteriorated because of using the time to increase, and the minimum speed of two frequency converters is
0.5Hz makes feed velocity may remain in 20~25r/min, guarantees that entire filter reaches higher production capacity and stable
Operation.
Since the degree of automation of whole pre- hanging filter 100 is relatively high, entire process flow is from white clay pre-hung, green mud
Filtering removes dehydration green mud layer, and the sequence control process such as pre-hung layer update are realized by automation control.
In the whole process flow, needs according to the technological requirements, DCS provide control signal to the first frequency converter (main transformer
Frequency device) 107 control first motors 104 moving direction and movement speed, while the first frequency converter 107 can also be by the control signal
It is transferred to the second frequency converter (from frequency converter) 108, moving direction and the shifting of the second motor 105 are controlled by the second frequency converter 108
Dynamic speed, makes two motors keep synchronous operation, and scraper is driven to need to move forward or back according to technique.
For example, DCS provides progress signal to the first frequency converter 107, motor drives scraper from initial position (lateral confinement position in addition
Switch is starting point) advanced with slowly speed to 111 direction of rotary drum, triggering limit when reaching the preset limit position of inside
Bit switch signal simultaneously feeds back to DCS, and DCS provides signal to the first frequency converter 107, then first motor 104, the second motor 105 change
Become moving direction, scraper is driven to retreat with faster speed to initial position, is triggered again when reaching the preset limit position in outside
Limit switch signal simultaneously feeds back to DCS, and DCS is provided progress signal and recycled to the first frequency converter 107 with this, and the speed that scraper is mobile
Degree then can require to be adjusted according to different technique.
Fig. 4 schematically illustrates a kind of side of pre- hanging filter 100 including scraper control system 101 as described above
Face cross-sectional view, wherein visible two motors, i.e. first motor 104 and the second motor 105, they synchronize driving scraper bases 102 to
Pre-hung layer 103 moves and leaves pre-hung layer 103.
In conclusion the scraper control system of pre- hanging filter provided by the utility model not only saves equipment operation
Maintenance cost improves the stability and accuracy of equipment operation, while the life cycle of equipment operation is also effectively mentioned
It is high.
The preferred embodiment of the utility model is described above, but the spirit and scope of the utility model are not limited to here
Disclosed particular content.Those skilled in the art can it is according to the present utility model introduction and make more embodiments and
Using these embodiments and application are all in the spirit and scope of the utility model.The spirit and scope of the utility model are not
It is limited, and is defined by the claims by specific embodiment.
Reference signs list
Pre- hanging filter 100
Scraper control system 101
Scraper base 102
Pre-hung layer 103
First motor 104
Second motor 105
Retarder 106
First frequency converter 107
Second frequency converter 108
Controller 109
Limit switch 110
Rotary drum 111
Working signal C
Frequency converter feedback signal F
Limit switch feedback signal L
Claims (6)
1. a kind of scraper control system (101), which is used to control the scraper base in pre- hanging filter (100)
(102) relative motion relative to pre-hung layer, which is characterized in that the scraper control system further include:
First motor (104) and the second motor (105), the first motor and second motor pass through retarder respectively
(106) it is connected with one end of the scraper base (102), to drive scraper base (102) to move；
First frequency converter (107), first frequency converter are connect with the first motor (104) signal to control the first motor
(104) revolving speed and steering；
Second frequency converter (108), second frequency converter are connect with the second motor (105) signal to control second motor
(105) revolving speed and steering；
Controller (109), the controller are provided for controlling the first motor (104) and second motor (105)
Revolving speed and the working signal of steering give first frequency converter (107), and receive and come from first frequency converter (107) and second
The frequency converter feedback signal of frequency converter (108), to monitor the fortune of the first motor (104) and second motor (105)
Row state.
2. scraper control system (101) according to claim 1, which is characterized in that first frequency converter (107) and institute
It states the second frequency converter (108) to be designed to directly connect with the controller (109) signal respectively, from the controller (109)
Identical working signal is received, to make the first motor (104) and the second motor (105) in the control of identical working signal
Make lower synchronous rotary and starting/stopping.
3. scraper control system (101) according to claim 1, which is characterized in that first frequency converter (107) is set
It is calculated as being suitable for receiving the working signal of controller (109) sending and the working signal being transferred to described second becoming
Frequency device (108), to keep the first motor (104) and the second motor (105) synchronous under the control of identical working signal
Rotation and starting/stopping.
4. scraper control system (101) according to any one of claim 1 to 3, which is characterized in that the scraper control
System (101) further include:
Limit switch (110), the limit switch is for detecting whether scraper base (102) has been moved to corresponding preset limit position
It sets, and provides limit switch feedback letter to controller (109) when scraper base (102) moves to corresponding preset limit position
Number,
Wherein, the controller (109) makes corresponding electricity to the sending of corresponding frequency converter after receiving the limit switch feedback signal
The signal that machine stops.
5. scraper control system (101) according to any one of claim 1 to 3, which is characterized in that the first motor
(104) and second motor (105) is servo motor.
6. a kind of pre- hanging filter (100), which is characterized in that the pre- hanging filter includes any in claim 1 to 5
Scraper control system (101) described in.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821545735.2U CN208814866U (en) | 2018-09-21 | 2018-09-21 | Scraper control system and pre- hanging filter with the scraper control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821545735.2U CN208814866U (en) | 2018-09-21 | 2018-09-21 | Scraper control system and pre- hanging filter with the scraper control system |
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| CN208814866U true CN208814866U (en) | 2019-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293193A (en) * | 2018-09-21 | 2019-02-01 | 安德里茨（中国）有限公司 | Scraper control system and pre- hanging filter with the scraper control system |
-
2018
- 2018-09-21 CN CN201821545735.2U patent/CN208814866U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293193A (en) * | 2018-09-21 | 2019-02-01 | 安德里茨（中国）有限公司 | Scraper control system and pre- hanging filter with the scraper control system |
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