CN203091125U - Scraper pressure control device for top-suspended type scraper unloading centrifugal machine - Google Patents
Scraper pressure control device for top-suspended type scraper unloading centrifugal machine Download PDFInfo
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- CN203091125U CN203091125U CN 201320021558 CN201320021558U CN203091125U CN 203091125 U CN203091125 U CN 203091125U CN 201320021558 CN201320021558 CN 201320021558 CN 201320021558 U CN201320021558 U CN 201320021558U CN 203091125 U CN203091125 U CN 203091125U
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- scraper
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- magnetic valve
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- pressure control
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Abstract
The utility model relates to the mechanical control technical field, in particular to a scraper pressure control device for a top-suspended type scraper unloading centrifugal machine. The scraper pressure control device for the top-suspended type scraper unloading centrifugal machine is characterized in that the input end of a pressure regulator is connected with compressed air, the output end of the pressure regulator is connected with a R port of a two-position three-way magnetic valve, a P port of the two-position three-way magnetic valve is directly connected with the compressed air, an A port of the two-position three-way magnetic valve is connected with a P port of a two-position five-way magnetic valve through an air tube, an A port of the two-position five-way magnetic valve is connected at the left end of an air cylinder, the right end of the air cylinder is connected with a B port of the two-position five-way magnetic valve, the top end of the air cylinder is connected with a scraper device, a position sensor is further arranged outside the left end of the air cylinder, the position sensor is a magnetic sensor, a magnetic ring is arranged on a piston inside the air cylinder, and when the piston moves to the position sensor position, the position sensor works. The scraper pressure control device for the top-suspended type scraper unloading centrifugal machine lowers the gap between a scraper and a filter screen, and slows down attrition to the filter screen, and prolongs the service life of the filter screen. Layer thickness left by a filter cake is controlled within 0.5 to 1 millimeter, and therefore yield of an end product is increased, yield is increased, and consumption is reduced.
Description
[technical field]
The utility model relates to mechanical control technology field, a kind of specifically scraper pressure control device that is applied to the top suspension centrifuge with cutter discharge of solid.
[background technology]
The top suspension centrifuge with cutter discharge of solid is to utilize powerful centrifugal force will enter the device that the interior suspension of rotary drum carries out Separation of Solid and Liquid, parting liquid is got rid of from the machine bottom through the casing mobile phone by filter medium, solid phase particles is then stayed in the rotary drum under the obstruct of filter screen, and by means of outside the device for discharging discharge machine, described device for discharging comprises scraper, utilize the radial and axial motion of scraper that solid phase particles is scraped from rotatory drum wall, finish discharge process.
After the top suspension centrifuge with cutter discharge of solid separates, as shown in Figure 1, need to rely on the scraper 3 that is installed in the rotary drum 1 that the filter cake on the filter screen 2 is struck off, doctor blade device drives by cylinder and realizes striking off operation, but in present technology, no matter doctor blade device feed or discharging operation, all there is not pressure adjustment control, compressed air directly enters two-position-five-way solenoid valve 6, cause scraper 3 under the total head state, to be worked all the time, cylinder all is in the total head state, and the total head state of cylinder easily causes the wearing and tearing of filter screen 2 in striking off process or scratches
For the wearing and tearing that prevent filter screen 2 or scratch, usually scraper 3 and filter screen 2 gaps are increased, but this measure then causes the filter cake residual quantity to increase, residual layer thickness has reduced yield at 3～5mm, has also reduced output; The adjustable doctor blade device of the disclosed a kind of scraper pressure of and for example domestic patent CN102152606A then is to utilize elastic buffering mechanism combined sensor and control module, and the distance of control scraper module and screen frame realizes the effect of control scraper pressure.But there is not the device of directly setting about carrying out the pressure control operation from the scraper cylinder pressure.
[summary of the invention]
The utility model purpose is to fill up the blank of prior art, providing a kind of directly controls from pressure, and be exclusively used in the scraper pressure control device of top suspension centrifuge with cutter discharge of solid, when reducing scraper and filter screen gap, improve product yield, increase output, reduce consumption, guarantee that filter screen is not worn.
For achieving the above object, design a kind of scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid, comprise the top suspension centrifuge with cutter discharge of solid, two-position-five-way solenoid valve, cylinder, PLC Programmable Logic Controller and compressed air, described centrifuge with cutter discharge of solid comprises rotary drum, filter screen and doctor blade device, described PLC Programmable Logic Controller is by power supply, CPU, memory, input/output interface circuit constitutes, it is characterized in that described scraper pressure control device also comprises two-position three way magnetic valve, pressure regulator and position sensor, the input of described pressure regulator connects compressed air, the output of described pressure regulator provides post-decompression compressed air to link to each other with two-position three way magnetic valve R port, described two-position three way magnetic valve P port directly connects compressed air, described two-position three way magnetic valve A port links to each other with two-position-five-way solenoid valve P port by tracheae, described two-position-five-way solenoid valve A port connects and the cylinder left end, described cylinder right-hand member connects two-position-five-way solenoid valve B port, described cylinder interior is provided with piston, the top of described cylinder connects doctor blade device, the dead ahead of described doctor blade device is provided with filter screen, the outside of described filter screen coats rotary drum, described position sensor, two-position three way magnetic valve and two-position-five-way solenoid valve are connected separately with the input/output interface circuit of PLC Programmable Logic Controller respectively.
Described PLC Controlled by Programmable Controller connects the electromagnet coil circuit of two-position three way magnetic valve, the magnetic field that utilizes two-position three way magnetic valve electromagnet coil connecting and disconnecting of the circuit to produce, change the position of the inner valve body of two-position three way magnetic valve, make the position of the inner valve body of two-position three way magnetic valve between R end and P port, switch, realize that the compressed air output pressure of two-position three way magnetic valve A port switches in decompression with between not reducing pressure.
Described PLC Controlled by Programmable Controller connects the electromagnet coil circuit of two-position-five-way solenoid valve, the magnetic field that utilizes two-position-five-way solenoid valve electromagnet coil connecting and disconnecting of the circuit to produce, change the position of the inner valve body of two-position-five-way solenoid valve, make the inner valve body of two-position-five-way solenoid valve between A, B port, switch, realize the gas flow switch operation of two-position-five-way solenoid valve A, B port, realize moving of piston.
Also be provided with piston rod on the piston of establishing in the described cylinder, described cylinder connects with doctor blade device by piston rod, realizes the incision of scraper and withdraws from operation.
Described position sensor adopts the Magnetic Induction device, magnet ring also is housed on the described piston, described magnet ring is with piston reciprocates, and when moving to the position sensor installation site, position sensor is to the input/output interface circuit transmission signal of PLC Programmable Logic Controller.
Be provided with preprogram in the CPU of described PLC Programmable Logic Controller, realize control the scraper pressure control device.
The utility model is compared with existing centrifuge scraper machine, on the basis of existing top suspension centrifuge with cutter discharge of solid, utilize the switching of two-position three way magnetic valve control pressure regulator, and the pressure size of pressure regulator when adjusting scraper near filter screen, the map function of total head feed, decompression discharging is realized, when reducing scraper and filter screen gap in the position that utilizes the position sensor controlled pressure to switch, slow down the wearing and tearing of filter screen, improve the service life of filter screen greatly; Significantly reduced the residual quantity of filter cake after the discharging, the layer thickness that filter cake is residual is controlled at 0.5～1mm, thereby has improved the yield of finished product, increases output, reduces consuming;
[description of drawings]
Fig. 1 is top suspension centrifuge with cutter discharge of solid scraper control principle figure in the prior art;
Fig. 2 is top suspension centrifuge with cutter discharge of solid scraper control principle figure in the utility model;
Fig. 3 is scraper of the present utility model schematic diagram during not near filter screen;
Fig. 4 is scraper of the present utility model schematic diagram during near filter screen;
1. rotary drums, 2. filter screens, 3. scrapers, 4. sensors, 5. cylinders, 6. two-position-five-way solenoid valves, 7. pressure regulators, 8. two-position three way magnetic valves among the figure.
[specific embodiment]
For making the purpose of this utility model, principle and product configurations more cheer and bright, now reach specific embodiment in conjunction with the accompanying drawings and be further elaborated, believe for a person skilled in the art and can realize that its complete technical scheme specifies referring to the following example.
Embodiment
This product is a kind of scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid, its principle is promptly utilized by described two-position three way magnetic valve 8 commutations of PLC Controlled by Programmable Controller, thereby whether the access of control pressure regulator 7, pressure size when adjusting scraper 3 then near filter screen 2, realize the total head feed, the map function of decompression discharging, compressed air is by two-position three way magnetic valve 8 controls specifically, via pressure regulator 7 or directly enter two-position-five-way solenoid valve 6, under the total head state, work during scraper 3 beginnings, when near filter screen 2, after the effect compressed air of position sensor 4 reduced pressure via pressure regulator 7, scraper 3 was worked under the state of decompression.
So its necessary parts such as Fig. 2 or Fig. 3 or shown in Figure 4, comprise top suspension centrifuge with cutter discharge of solid, two-position-five-way solenoid valve 6, cylinder 5 and compressed air, described centrifuge with cutter discharge of solid comprises rotary drum 1, filter screen 2 and doctor blade device 3, two-position three way magnetic valve 8, pressure regulator 7 and position sensor 4.
Above-mentioned necessary parts connect by Fig. 2 or Fig. 3 or structure shown in Figure 4, the input of pressure regulator 7 connects compressed air specifically, the output of described pressure regulator 7 provides post-decompression compressed air to link to each other with two-position three way magnetic valve 8 R ports, described two-position three way magnetic valve 8P port directly connects compressed air, described two-position three way magnetic valve 8A port links to each other with two-position-five-way solenoid valve 6P port by tracheae, described two-position-five-way solenoid valve 6A port connects and cylinder 5 left ends, described cylinder 5 right-hand members connect two-position-five-way solenoid valve 6B port, the top of described cylinder connects doctor blade device 3, the dead ahead of described doctor blade device 3 is provided with filter screen 2, the outside of described filter screen 2 coats rotary drum 1, described cylinder 5 left ends also are provided with position sensor 4 outward, described position sensor 4 is the Magnetic Induction device, on described cylinder 5 inner carriers magnet ring is housed, when piston moves to sensor 4 positions, sensor 4 work.。
For realizing convertible operation, therefore with described pressure regulator 7 and two-position three way magnetic valve 8 combinations, by 8 commutations of the described two-position three way magnetic valve of PLC Controlled by Programmable Controller, make described two-position three way magnetic valve 8A port output pressure for switching between the compressed air of not decompression and the decompression back compressed air; Described two-position-five-way solenoid valve 6A port connects and cylinder 5 left ends, and described cylinder 5 right-hand members connect two-position-five-way solenoid valve 6B port, and by described two-position-five-way solenoid valve 6 commutations of PLC Controlled by Programmable Controller, the piston of control cylinder 5 moves; The piston rod of described cylinder 5 connects with doctor blade device 3, and the piston of control cylinder 5 moves, and finishes the incision of scraper and withdraws from; Described position sensor 4 is the Magnetic Induction device, on described cylinder 5 inner carriers magnet ring is housed, when piston moves to sensor 4 positions, and sensor 4 work, and pass the signal to the PLC Programmable Logic Controller; Described PLC Programmable Logic Controller is finished the control of whole process by the program of establishment in advance.
Install through above-mentioned steps and promptly to obtain scraper pressure control device of the present utility model, this scraper pressure control device can realize near and near two states, respectively shown in Fig. 3 and 4,
Fig. 3 is scraper of the present utility model schematic diagram during not near filter screen, two-position-five-way solenoid valve 6 commutations when scraper 3 will be worked, this moment, compressed air directly entered two-position three way magnetic valve 8, enter cylinder 5 through two-position-five-way solenoid valve 6 again, scraper 3 beginnings are cut to filter screen 2 directions, this moment, the pressure at cylinder 5 was total head work, the incision of scraper 3 total heads;
Fig. 4 is scraper of the present utility model schematic diagram during near filter screen, when scraper 3 during, be installed in position sensor 4 work on the cylinder 5,8 commutations of control two-position three way magnetic valve near filter screen 2, pressure regulator 7 is cut circuit at this moment, source of the gas enters two-position three way magnetic valve 8 after reducing pressure via pressure regulator 7, enters cylinder 5 through two-position-five-way solenoid valve 6 again, be decompression work this moment, the pressure that acts on cylinder 5 reduces, and has reduced the pressure of 3 pairs of filter screens 2 of scraper, and the big or small visual actual conditions of pressure are adjusted.
Claims (6)
1. scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid, comprise the top suspension centrifuge with cutter discharge of solid, two-position-five-way solenoid valve (6), cylinder (5), PLC Programmable Logic Controller and compressed air, described centrifuge with cutter discharge of solid comprises rotary drum (1), filter screen (2) and doctor blade device (3), described PLC Programmable Logic Controller is by power supply, CPU, memory, input/output interface circuit constitutes, it is characterized in that described scraper pressure control device also comprises two-position three way magnetic valve (8), pressure regulator (7) and position sensor (4), the input of described pressure regulator (7) connects compressed air, the output of described pressure regulator (7) provides post-decompression compressed air to link to each other with two-position three way magnetic valve (8) R port, described two-position three way magnetic valve (8) P port directly connects compressed air, described two-position three way magnetic valve (8) A port links to each other with two-position-five-way solenoid valve (6) P port by tracheae, described two-position-five-way solenoid valve (6) A port connects and cylinder (5) left end, described cylinder (5) right-hand member connects two-position-five-way solenoid valve (6) B port, described cylinder (5) inside is provided with piston, the top of described cylinder connects doctor blade device (3), the dead ahead of described doctor blade device (3) is provided with filter screen (2), the outside of described filter screen (2) coats rotary drum (1), described cylinder (5) left end also is provided with position sensor (4) outward, described position sensor (4), two-position three way magnetic valve (8) and two-position-five-way solenoid valve (6) are connected separately with the input/output interface circuit of PLC Programmable Logic Controller respectively.
2. a kind of scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid as claimed in claim 1, it is characterized in that described PLC Controlled by Programmable Controller connects the electromagnet coil circuit of two-position three way magnetic valve (8), make the position of the inner valve body of two-position three way magnetic valve (8) between R end and P end, switch.
3. a kind of scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid as claimed in claim 1, it is characterized in that described PLC Controlled by Programmable Controller connects the electromagnet coil circuit of two-position-five-way solenoid valve (6), make the inner valve body of two-position-five-way solenoid valve (6) between A, B end, switch.
4. a kind of scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid as claimed in claim 1, also be provided with piston rod on the piston that it is characterized in that establishing in the described cylinder (5), described cylinder (5) connects with doctor blade device (3) by piston rod, realizes the incision of scraper and withdraws from operation.
5. a kind of scraper pressure control device that is used for the top suspension centrifuge with cutter discharge of solid as claimed in claim 1, it is characterized in that described position sensor (4) adopts the Magnetic Induction device, on described cylinder (5) inner carrier magnet ring is housed also, described magnet ring is with piston reciprocates, when moving to position sensor (4) installation site, position sensor (4) is to the input/output interface circuit transmission signal of PLC Programmable Logic Controller.
6. as claim 1 or 2 or 3 described a kind of scraper pressure control device that are used for the top suspension centrifuge with cutter discharge of solid, it is characterized in that being provided with preprogram in the CPU of described PLC Programmable Logic Controller, realize control the scraper pressure control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021558 CN203091125U (en) | 2013-01-15 | 2013-01-15 | Scraper pressure control device for top-suspended type scraper unloading centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021558 CN203091125U (en) | 2013-01-15 | 2013-01-15 | Scraper pressure control device for top-suspended type scraper unloading centrifugal machine |
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| Publication Number | Publication Date |
|---|---|
| CN203091125U true CN203091125U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320021558 Expired - Fee Related CN203091125U (en) | 2013-01-15 | 2013-01-15 | Scraper pressure control device for top-suspended type scraper unloading centrifugal machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939409A (en) * | 2014-04-16 | 2014-07-23 | 江苏通用科技股份有限公司 | Forming machine right steel ring pre-support pneumatic driving device |
| CN105013629A (en) * | 2015-07-02 | 2015-11-04 | 蚌埠市兴利离心机制造有限公司 | Vertical gravity discharge screen centrifuge |
| CN107138295A (en) * | 2017-06-22 | 2017-09-08 | 合肥通用机械研究院 | A kind of gas-liquid Combined scraper structure for centrifugal dehydrator |
| CN109622248A (en) * | 2018-12-19 | 2019-04-16 | 青海盐湖工业股份有限公司 | A kind of filter cake scraper system |
| CN112983928A (en) * | 2021-03-26 | 2021-06-18 | 芜湖市双彩智能科技有限公司 | Protection system suitable for cylinder |
-
2013
- 2013-01-15 CN CN 201320021558 patent/CN203091125U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939409A (en) * | 2014-04-16 | 2014-07-23 | 江苏通用科技股份有限公司 | Forming machine right steel ring pre-support pneumatic driving device |
| CN105013629A (en) * | 2015-07-02 | 2015-11-04 | 蚌埠市兴利离心机制造有限公司 | Vertical gravity discharge screen centrifuge |
| CN105013629B (en) * | 2015-07-02 | 2017-10-13 | 蚌埠市兴利离心机制造有限公司 | A kind of vertical lower discharging centrifuge |
| CN107138295A (en) * | 2017-06-22 | 2017-09-08 | 合肥通用机械研究院 | A kind of gas-liquid Combined scraper structure for centrifugal dehydrator |
| CN109622248A (en) * | 2018-12-19 | 2019-04-16 | 青海盐湖工业股份有限公司 | A kind of filter cake scraper system |
| CN112983928A (en) * | 2021-03-26 | 2021-06-18 | 芜湖市双彩智能科技有限公司 | Protection system suitable for cylinder |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20180115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |