CN203017833U - High pressure filter press with linked feed pressure and compacting pressure - Google Patents
High pressure filter press with linked feed pressure and compacting pressure Download PDFInfo
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- CN203017833U CN203017833U CN 201220687991 CN201220687991U CN203017833U CN 203017833 U CN203017833 U CN 203017833U CN 201220687991 CN201220687991 CN 201220687991 CN 201220687991 U CN201220687991 U CN 201220687991U CN 203017833 U CN203017833 U CN 203017833U
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- feed pump
- oil cylinder
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Abstract
The utility model discloses a high pressure filter press with linked feed pressure and compacting pressure. The high pressure filter press comprises a filter press body, a feed pump and an oil cylinder, wherein the feed pump and the oil cylinder are respectively connected with the filter press body, the oil cylinder is connected with a hydraulic station through a hydraulic proportion regulating valve, and the high pressure filter press is characterized by further comprising a PLC (programmable logic controller), the feed pump is driven through a belt variable frequency motor, the PLC is connected with the belt variable frequency motor of the hydraulic feed pump and the hydraulic proportion regulating valve, the PLC is used for detecting the pressure of the feed pump and the oil cylinder through a pressure signal detection device. Compared with the prior art, the high pressure filter press disclosed by the utility model has the following advantages and effects that the effects of being simple to control and easy to realize are achieved, the feed pressure of the filter press is greatly improved, the filtrate-separating capability of the material in a filter chamber is improved, the control reaction is fast, and the efficiency is high.
Description
Technical field
The utility model relates to the high pressure filter press of a kind of feed pressure and compaction pressure interlock.
Background technology
Existing chamber-type press filter operation principle is to rearrange filter chamber (the filter plate both sides are recessed, and every two filter plates are synthesized a railway carriage or compartment shape filter chamber) by filter plate.There are pit and boss in the surface of filter plate, in order to supporting filter cloth.On the center of filter plate and corner, through hole is arranged, after assembling, the passage of complete, can pass into suspension, washings and draw filtrate.Each jug rest of filter plate both sides compresses filter plate by hold down gag on crossbeam.Filter cloth between filter plate seals.Under the pressure-acting of dehvery pump, send the feed liquid that needs filter to each filter chamber, by filter medium (selecting suitable filter cloth according to different industries), with solid and fluid separation applications.Form filter residue on filter cloth, form filter cake until be full of filter chamber.Filtrate is passed filter cloth and along the filter plate trench flow to below fluid hole passage, is concentrated and discharge.Therefore under condition of the same race, the pressure of dehvery pump is that feed pressure is larger, and in filter chamber, feed separation filtrate ability is larger, but is subject to the impact of filter plate holding capacity, and pressure can not endlessly increase, otherwise the phenomenon of filter plate can easily occur.The pressure of at present domestic filter press the most very much not can surpass 1.3MPa, substantially all operates between 0.8-1MPa.
The excessive main cause that causes filter plate to destroy of common filter press feed pressure is what the technique of operation control at present determined.before charging, at first filter plate compresses, because filter chamber is in without the material state, compaction pressure all acts on the narrow and small area of filter plate surrounding, so compaction pressure can only arrive certain value, this value is unlikely to crush filter plate, and after charging, filter chamber is set up pressure gradually, the compaction pressure of this counteracted by pressure part filter plate, make the narrow and small area of filter plate surrounding be subject to that compaction pressure is corresponding to diminish, but in order to guarantee the sealing state between filter plate, so the value of compaction pressure must overcome feed pressure, allow and keep sealing state between filter plate, therefore this method of controlling operation thereof has determined that feed pressure is subject to the compaction pressure restriction, and the compaction pressure restriction that filter plate is crushed when being subject to the air filter chamber, Here it is, and the filter press feed pressure can not be over the basic reason of 1.3MPa at present.
The utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, can improve the high pressure filter press of filter press feed pressure, the feed pressure that improves feed separation filtrate ability in filter chamber and compaction pressure interlock.
The technical scheme in the invention for solving the above technical problem is: the high pressure filter press of this feed pressure and compaction pressure interlock, comprise filter press body, feed pump and oil cylinder, feed pump, oil cylinder connect respectively the filter press body, oil cylinder connects Hydraulic Station by hydraulic pressure than row control valve, it is characterized in that: also comprise the PLC controller, described feed pump adopts the band variable-frequency motor to drive, the band variable-frequency motor of PLC controller connection hydraulic feed pump and hydraulic pressure are than row control valve, and the PLC controller detects feed pump and oil cylinder working-pressure by the pressure signal checkout equipment.Compaction pressure is to control by the pressure proportional magnetic valve, just can carry out compaction pressure by the analog quantity of standard, and feed pressure drives by frequency converter feed pump is controlled.Adopt this structure not only to control simply, easily realize, greatly improved the filter press feed pressure, the characteristics that have more simple structure, respond fast.
Filter press body described in the utility model adopts high pressure chamber-type press filter body.
The utility model compared with prior art has the following advantages and effect: control simple, easily realization, greatly improved the filter press feed pressure, thereby improve feed separation filtrate ability in filter chamber, control reaction fast, efficient is high.
Description of drawings
Fig. 1 is the utility model example structure schematic diagram.
Fig. 2 is the feed pressure closed-loop control block diagram of the utility model embodiment.
Fig. 3 is the compaction pressure closed-loop control block diagram of the utility model embodiment.
Fig. 4 the utility model embodiment feed pressure and compaction pressure interlock controlled pressure curve map.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Referring to Fig. 1, the high pressure filter press of the present embodiment feed pressure and compaction pressure interlock, comprise filter press body 1, feed pump 2, oil cylinder 3 and PLC controller 4, feed pump 2, oil cylinder 3 connect respectively filter press body 1, oil cylinder 3 connects Hydraulic Station by hydraulic pressure than row control valve 5, feed pump 2 adopts band variable-frequency motor 7 to drive, the band variable-frequency motor 7 of PLC controller 4 connection hydraulic feed pumps 2 and hydraulic pressure are than row control valve 5, PLC controller 4 detects feed pump 2 and oil cylinder 3 pressure by pressure signal checkout equipment 6, and filter press body 1 adopts high pressure chamber-type press filter body 1.
Referring to Fig. 2 to Fig. 4, the control method of the high pressure filter press of the present embodiment feed pressure and compaction pressure interlock comprises
A) before charging, filter press is applied the compression precompression, the sealing state of filter plate when keeping filter press air filter chamber;
B) begin charging, constantly be full of the filter chamber of filter press along with material, the feed pressure in filter chamber constantly increases, and the compaction pressure that filter press is applied also increases according to certain ratio accordingly.
In the process that the present embodiment feed pressure constantly increases, the pid algorithm that passes through carries out closed-loop control to feed pressure, and control procedure is referring to Fig. 2; The pid algorithm formula is as follows:
u(n)=Kp{e(n)+T/Ti*∑e(n)+Td/T*[e(n)-e(n-1)]}+u(n-1)，
Wherein u (n) is the output valve of current controller; E (n) is the error between current controller input and setting value; U (n-1) is the output valve of previous regulating cycle controller; E (n-1) is the error between the current controller input of previous regulating cycle and setting value, and Kp is proportionality coefficient.Ti is integration time constant; Td is derivative time constant; T is regulating cycle.
By the fast PID algorithm, compaction pressure is carried out closed-loop control in the process that compaction pressure increases.The fast PID algorithm, on the basis of pid algorithm, setting value is to change along with certain process variable variations, by KP, Ti in adjustment formula, the value of Td, is that actual compaction pressure is followed setting value fast in the present embodiment, control procedure is referring to Fig. 3.
The dominated formulate of the present embodiment compaction pressure is: P=P0+K*Pb, and wherein, P is compaction pressure, and P0 is for compressing precompression, and Pb is the charging current pressure, and V is that the charging frequency is given, K is feed pressure and compaction pressure interlock coefficient.The general span of K: 1-1.5, consider on-the-spot complicated situation, during field adjustable, the K value is first tested from big to small, along with the K value diminishes, filter press tends to the material spray state gradually, writes down the K value of material spray critical condition, add 20% value, this has just determined the value of feed pressure and compaction pressure interlock COEFFICIENT K.Feed pressure and compaction pressure interlock controlled pressure curved line relation are referring to Fig. 4.
Above content described in this specification is only to the explanation of the utility model example.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; only otherwise depart from the content of the utility model specification or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (2)
1. the high pressure filter press of a feed pressure and compaction pressure interlock, comprise filter press body, feed pump and oil cylinder, feed pump, oil cylinder connect respectively the filter press body, oil cylinder connects Hydraulic Station by hydraulic pressure than row control valve, it is characterized in that: also comprise the PLC controller, described feed pump adopts the band variable-frequency motor to drive, and the band variable-frequency motor of PLC controller connection hydraulic feed pump and hydraulic pressure are than row control valve, and the PLC controller detects feed pump and oil cylinder working-pressure by the pressure signal checkout equipment.
2. the high pressure filter press of feed pressure according to claim 1 and compaction pressure interlock, is characterized in that: described filter press body employing high pressure chamber-type press filter body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220687991 CN203017833U (en) | 2012-12-13 | 2012-12-13 | High pressure filter press with linked feed pressure and compacting pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220687991 CN203017833U (en) | 2012-12-13 | 2012-12-13 | High pressure filter press with linked feed pressure and compacting pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203017833U true CN203017833U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220687991 Withdrawn - After Issue CN203017833U (en) | 2012-12-13 | 2012-12-13 | High pressure filter press with linked feed pressure and compacting pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN203017833U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007628A (en) * | 2012-12-13 | 2013-04-03 | 浙江华章科技有限公司 | Feeding pressure and pressing pressure linkage type pressure filter control method and high-pressure pressure filter |
| CN105864128A (en) * | 2016-05-27 | 2016-08-17 | 王军 | Automatic pressure balancing device for pressure filter |
| CN110575690A (en) * | 2019-09-30 | 2019-12-17 | 邵芮 | Pressing mechanism of filter press |
-
2012
- 2012-12-13 CN CN 201220687991 patent/CN203017833U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007628A (en) * | 2012-12-13 | 2013-04-03 | 浙江华章科技有限公司 | Feeding pressure and pressing pressure linkage type pressure filter control method and high-pressure pressure filter |
| CN105864128A (en) * | 2016-05-27 | 2016-08-17 | 王军 | Automatic pressure balancing device for pressure filter |
| CN105864128B (en) * | 2016-05-27 | 2017-10-13 | 广东省机械研究所 | A kind of filter press self-balancing pressure device |
| CN110575690A (en) * | 2019-09-30 | 2019-12-17 | 邵芮 | Pressing mechanism of filter press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130626 Effective date of abandoning: 20150325 |
|
| RGAV | Abandon patent right to avoid regrant |