CN1046101C - Air supply system of jig in coal dressing plant - Google Patents
Air supply system of jig in coal dressing plant Download PDFInfo
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- CN1046101C CN1046101C CN93110292A CN93110292A CN1046101C CN 1046101 C CN1046101 C CN 1046101C CN 93110292 A CN93110292 A CN 93110292A CN 93110292 A CN93110292 A CN 93110292A CN 1046101 C CN1046101 C CN 1046101C
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Abstract
The present invention relates to an air supply system used for a plurality of air blowers of a jig in a coal separating plant for parallel connection and air supply. The present invention is composed of an air inlet silencer, an air blower, a valve, an air outlet silencer, an air storage tank, a jig air supply valve, a check valve on an outlet of the air blower and a new low-pressure large-flow safety overflow valve on a main wind pipe, wherein an electricity controlling part uses an automatic control device to use a programmable controller as the center and is connected with a microcomputer for supervision. The present invention has the advantages of simple structure, flexible and reliable action, high performance for pressure keep, and capability of realizing light-load start, and does not influence normal operation between systems, so that the present invention can realize single-device control and systemic multi-device automatic control.
Description
The present invention relates to air feed system, especially for a kind of many Roots blowers air feed system in parallel of coal preparation plant's jigging machine air feed.
The air supply system of jig in coal dressing plant of prior art, a kind of is large capacity single platform air blast air feed, another kind is many air blasts air feeds in parallel.The shortcoming of separate unit air feed is: though jigging machine open what, in operation, power consumption is big all the time for air blast; Many air feeds in parallel: because equipment itself and system design equal unprotect device; the adjustment of blast size relies on the platform number of start-stop air blast fully and realizes; the low coal separation quality that influences of the lighter's system pressure; weight person's overcurrent tripping; the influence safety in production; simultaneously, in the overload process, aggravate mechanical wear, increase the maintenance of equipment amount.The U.S. uses at present a kind of with Hydraulic Station, can regulate the air supply device of separate unit jigging machine blast automatically.Its objective is the automatic adjusting that realizes blast; Its formation is, on the air blast pipeline, establish exhaust gate valve, before starting, air supply device must open exhaust gate valve earlier, close exhaust gate valve to the jigging machine air feed Deng after the air blast startup, every jigging machine is regulated the air feed pressure that the butterfly valve capacity keeps jigging machine by pressure sensor control hydraulic push rod; Its weak point is: can not realize pressurize fully 1.; 2. complex structure; 3. every jigging machine all will be by the self-checking device of a platform independent; 4. replacing jigging machine difficulty in service is prone to superpressure; 5. cost is too high uneconomical.
The objective of the invention is to overcome weak point of the prior art, and provide a kind of simple in structure, it is reliable to be active in one's movements, pressure maintaining performance is good, can realize light-load starting, not influence normally operation between system, and can realize many air supply system of jig of controlling automatically of unit control and system.
Purpose of the present invention can reach by following measure:
In the air supply system of jig in coal dressing plant of many air blasts air feed in parallel, comprise at least two air blasts, the air inlet of every air blast is connected with the air inlet muffler, the air outlet of every air blast through non-return valve, go out damper, the air outlet muffler is connected with blast main, blast main is connected with air accumulator, air accumulator is connected with jigging machine through jigging machine air feed gate valve, in addition, also is connected with the big flow safety overflow valve of low pressure on the blast main.The non-return valve of every blower export place installation is as the isolated component between system and the air blast, and the big flow safety overflow valve of the low pressure that connects on the blast main is the pressurize element as system.The electric control system of system is to be the automaton of core with the programmable controller.The binding post of the input module of programmable controller is connected with following gauge tap or sense switch through holding wire: the electrical control that A. is located at automaton cashier's office in a shop:
A. be used for unit control and many mode change-over switches of controlling conversion automatically,
B. the fault that is used for the closing fault air blast stops to cross switch,
Start the start button switch that air blast is used when c. unit is controlled,
The stop button switch that the machine of turning off the blast was used when d. unit was controlled, B. is located at every air blast and goes out on the damper:
Make this air blast enter going out that accurate starting state uses when going out to send after damper is opened signal
Damper protection switch, C. are located on the big flow safety overflow valve of low pressure:
A. when the blast main blast does not reach rated pressure, send increase air blast signal, when total wind
Manage-style is pressed to send when reaching rated pressure and is stopped the rated pressure control that the air blast signal is used
Switch,
B. when the blast main blast surpasses rated pressure, send and subtract out the superpressure limit that the air blast signal is used
Bit switch, D. are located on the jigging machine air feed gate valve:
After opening, certain jigging machine air feed gate valve make air blast enter the air feed lock that accurate starting state is used
Valve is opened sense switch, and E. is located on the jigging machine hilllock point:
Control adopts automatic program control or locking to control the post latch switch of usefulness automatically.The binding post of programmable controller output module is connected with the start-up control loop of each blower motor through control line.
Purpose of the present invention can also reach by following measure:
The programmable controller of the automaton of air supply system of jig is connected with control microcomputer.
The big flow safety overflow valve of low pressure that air supply system of jig adopts is made up of the spool of Direct Action Type in the valve body of cylinder sleeve type, the valve body, silencer cover, balancing weight etc.The top of valve body is standing portion, and the inward flange of a circle level is arranged on this inwall, is laying spool on the inward flange, is added with lip ring between inward flange and the spool, and spool can slide up and down along the tube wall of valve body inward flange with top.Have exhaust outlet on the tube wall of valve body inward flange with top, exhaust outlet is equipped with silencer cover outward, on the tube wall of inward flange with the lower part Pressure gauge is installed.The core hole is arranged at the top of spool, lays the adjustable balancing weight of number in the core hole; On the spool end face support is installed, when support slides up and down with spool, shake-up is arranged on rated pressure gauge tap, the superpressure limit switch of valve body top, make it to send respectively the signal of stopping air blast, subtracting out air blast.
The present invention compared with prior art has following advantage:
1. simple in structure, it is reliable to be active in one's movements, and pressure maintaining performance is good, can realize light-load starting, does not influence normally operation between system.
2. safety overflow valve is arranged as pressure retaining parts, stablized whole system air feed pressure.
3. owing to adopt non-return valve, remove and satisfy light-load starting, the loaded down with trivial details manual labor that has also alleviated the switch gate valve greatly as isolated component.
4. realize many controls automatically of unit control and air feed system.
The drawing of accompanying drawing is described as follows:
Fig. 1: the schematic diagram of air supply system of jig of the present invention
Fig. 2: the electrical control cabinet panel schematic diagram of electric control system
Fig. 3: the formation of electric control system programmable controller and be connected block diagram with microcomputer
Fig. 4: the wiring diagram of programmable controller input module, output module connecting terminal block
Fig. 5: the execution loop schematic diagram of electric control system
Fig. 6: the big flow safety overflow valve of low pressure structural representation
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail:
Fig. 1 shows the composition of air supply system of jig of the present invention, is example with four Roots blowers among the figure.This air feed system air inlet is equipped with air inlet muffler 1, the exit of air blast 2 is equipped with low pressure non-return valve 3, is gone out damper 4, air outlet muffler 5 and blower export safety valve 11, the outlet on each road communicates with blast main, blast main is communicated with air accumulator 6, air accumulator 6 is communicated with jigging machine by jigging machine air feed gate valve 7, blast main is connected with the big flow safety overflow valve 10 of low pressure, and unnecessary gas drains into atmosphere by overfall muffler 9 when superpressure.All the other have air accumulator safety valve 8.Electric control system is realized the start and stop control to the individual device of air feed system.Blast main or title trunk line.The big flow safety overflow valve 10 of low pressure is as the pressurize element of system, and low pressure non-return valve 3 is as the isolated component between system and the air blast, make not open or the air blast and the system that start isolated.It is the electrical control cabinet at center that electric control system adopts with the programmable controller, realizes that the automatic control and the unit of many air blasts of air feed system manually controlled, and adopts microcomputer to be connected with programmable controller, realizes Centralized Monitoring.
Fig. 2 shows the electrical control cabinet panel of electric control system.Be provided with on electrical control cabinet 12 panels in control room: 1. mode change-over switch FZK: the switch open position is the unit manual control mode, and switch closed position is many automatic control modes, by control personnel manual control; 2. fault stops to cross switch 1GTK～4GTK: be used for the closing fault air blast; 3. unit start button 1QA～4QA, stop button 1TA～4TA: be used for unit control start and stop; 4. power switch K; All the other A, V, t ° is electric current, voltage, temperature indicating instrument.
Fig. 3 show programmable controller formation and with being connected of microcomputer.Programmable controller is selected the T1545 type that can be connected with microcomputer for use, and it is a modular structure.This device adopts each formation of power module 13,14,32 input module M1 of host module (15) and 16 output module M2 (16), and module connects the grafting form that all adopts.Microcomputer 18 can be selected the PC-286 type for use:, be connected the operation of monitoring system by 9 core cables 17 and RS232 standard serial interface with programmable controller.
Fig. 4 shows the wiring of input module M1 and output module M2 connecting terminal block 19,20.The A1 of M1～A8 terminal meets switch TFK, GBK, Kpe, Kpc, FZK, 1GTK～3GTK respectively; B1～B8 terminal meets switch 4GTK, 1QA, 1TA, 1BK, 2QA, 2TA, 2BK, 3QA respectively; C1～C5 terminal meets switch 3TA, 3BK, 4QA, 4TA, 4BK respectively; Its AR, BR, CR are the common line terminal, connect the zero line of alternating current 220V power supply; Another termination alternating current 220V power supply phase line of above-mentioned switch.The A1 of M2～A4 terminal meets intermediate relay ZJ 1～ZJ4 respectively, another termination alternating current 220V power supply phase line of ZJ1～ZJ4; Its AR terminal connects the alternating current 220V zero-power line.K switch is the power switch of programmable controller.
Mode change-over switch FZK, the fault of switch among the figure on above-mentioned electrical control cabinet panel stops to cross switch 1GTK～4GTK, unit start button 1QA～4QA, unit stop button 1TA～4TA, the power switch K, and remaining is:
1. rated pressure gauge tap Kpe and the superpressure limit switch Kpc that installs on safety overflow valve 10: rated pressure gauge tap Kpe is used to control automatic increase and stops to establish newly air blast, and superpressure limit switch Kpc is used for control and subtracts out air blast.
2. at post latch switch GBK that jigging machine hilllock point is provided with: so that whether control adopts automatic program control still is that locking is automatic.That is control by the jigging machine Field Force, adopt still not allow to adopt automatic program control to start air blast.
3. the air feed gate valve that is provided with on jigging machine air feed gate valve 7 is opened sense switch TFK.In this routine Fig. 1, two 6 one of air accumulators are standby, two air feed gate valves 7 of air accumulator 6, and one of them also is standby, is the jigging machine air feed with one road air feed gate valve 7 only promptly, establishes one so the air feed gate valve is opened sense switch TFK at this.
4. go out the protection switch 1BK～4BK that is provided with on the damper 4 at four air blasts: open out damper 4, the normally open contact of corresponding protection switch is with closure.
Fig. 5 shows the execution loop of electric control system.Among the figure: ZJ1-1～ZJ4-1 is the normally open contact of intermediate relay ZJ 1～ZJ4, go here and there respectively in the magnetic coil CJ1～CJ4 control loop of A.C. contactor, the normally open contact of CJ1-1～CJ4-1 A.C. contactor, the start and stop of the motor D 1～D4 of four air blasts of control.
Fig. 6 shows the structure of the big flow safety overflow valve 10 of low pressure.It mainly contains valve body 21, spool 22, silencer cover 23, balancing weight 26, protective cover 31 compositions.The valve body 21 of cylinder sleeve type is made of two parts up and down, the cylindrical shape of top for erectting, and the bottom is the right-angle elbow pipe form of band flange disc.The outside is welded with several piece gusset reinforcement by connection between the two.At the connecting portion of the two, because of lower diameter forms inward flange less than the top internal diameter, lay the spool 22 of Direct Action Type on the inward flange of valve body 21, between valve body 21 inward flanges and the spool 22 seal 32 is housed.Have exhaust outlet 34 on the tube wall more than the inward flange of valve body 21.Silencer cover 23 cylindraceous is housed outside the exhaust outlet 34, and it is by pressing small cup 24, bolt 25 to be fixed on the periphery of valve body 21.Silencer cover 23 is that porous little copper ball agglomerated material is made, and perhaps is made of the different multiple layer metal net of order number.The core hole is arranged at the top of spool 22, lays balancing weight 26 in the core hole, and the number of balancing weight 26 can be regulated as required.Balancing weight 26 centers have the screw thread of being convenient to load and unload.Sintering has the polytetrafluoroethylene lubricating layer on the top layer, the face of cylinder of spool 22.
End face at valve body 21 is fixed with cover plate 27 by screw, and it is that Kpc, rated pressure gauge tap 29 are Kpe that superpressure limit switch 28 is housed on the cover plate 27.The two is position limited inching switch, and the normal opened contact that utilizes 28 normal opened contact and 29 respectively is for control automatically and show detection signal is provided.Be installed in the support 30 of spool 22 end faces, pass the hole on the cover plate 27, act on switch 28 and 29.Pressure gauge 33 is equipped with in the bend pipe outside in valve body 21 bottoms, so that observe and adjust.
The operation principle of the big flow safety overflow valve 10 of low pressure:
1. valve 10 is connected with blast main through flange disc, when the blast main blast lower and when being not enough to jack-up spool 22, spool 22 drops on plaing on the sealing and the seal 32 of buffering effect on valve body 21 inward flanges, does not produce overflow, and the normal opened contact of rated pressure gauge tap Kpe (29) remains closed.
3. when the blast main blast rises to rated pressure, move on the spool 22 with valve body 21 inward flanges on seal 32 break away from, press wind to discharge and produce overflow through the exhaust outlet 34 of safety overflow valve 10; Meanwhile, with moving on the spool 22, act on rated pressure gauge tap Kpe (29), make the normal opened contact of K switch pe (29) be converted to disconnection, and stop increase by control device control air blast able to programme by closure as the support 30 that detects actuator.
3. if because of reducing with air quantity, when the blast main blast surpasses rated pressure, spool 22 lifting heights strengthen, make to move on the support 30 and touch superpressure limit switch Kpc (28), make the normal opened contact of Kpc (28) be converted to closure by often opening, and subtract out by control device able to programme control air blast, till the blast main ventilation pressure loss disconnects to rated pressure scope, Kpc (28).
Rated pressure is adjusted with balancing weight 26, and is shown by Pressure gauge 33.23 sound deadenings of silencer cover.So this safety overflow valve 10 has the effect of safety overflow valve and muffler 9 concurrently.
Automatically controlled operation principle: one. unit control: establishing four air blasts and be numbered 1#～4#, is example with the 1# air blast, and it is right
The switch of answering is 1QA, 1TA, 1BK, 1GTK.1. prepare: FZK pulls the left side open position with the mode change-over switch, i.e. unit control mode,
Open out damper, the power turn-on K switch.2. operation: press start button 1QA, ZJ1 gets electric adhesive and self-insurance, and ZJ1-1 connects, CJ1
Adhesive, CJ1-1 connects, and 1# blower motor D1 opens.3. out of service: click stop button 1TA, the ZJ1 dead electricity, CJ1 discharges, and CJ1-1 disconnects
D1 is out of service for the 1# blower motor.Two. air feed system is controlled automatically: 1#～4# air blast sequence starting.1. prepare: post latch switch GBK is pulled the right side close the platform position, the mode change-over switch
FZK pulls the right side closing position, i.e. many sequential control modes, and fault stops
Cross switch 1GTK～3GTK and pull a left side and survey open position, open out damper 4,
Go out damper protection switch 1BK～4BK and connect the power turn-on K switch.2. operation automatically: 1. automatic sequence is opened air blast: any jigging machine air feed gate valve 7 is opened the air feed lock
Valve is opened sense switch TFK and is closed platform, because air feed system does not reach specified pressure as yet
Power, the normally opened contact closure of rated pressure gauge tap Kpe, electric-control system will
Open in proper order by the program of programmable controller, according to the time interval of setting
Open 1# blower motor D1, after the 1# air blast is opened, if in setting time
System's blast does not still reach rated pressure, and the Kpe normally open contact continues closed, 2#
Air blast will start, till system reaches rated pressure.2. automatic sequence subtracts out air blast: air feed system with air quantity reduce, during the superpressure overflow, superpressure
Limit switch Kpc closure, system will by after open the principle of stopping earlier, order subtracts and stops
Air blast, blast drops to rated pressure until system, till promptly Kpc disconnects.3. fault is crossed the automatic sequence unlatching and is subtracted out air blast in proper order: when certain air blast hinders for some reason
In the time of can not moving, for example 1# can stop to cross switch 1GTK with corresponding fault and pull
To the right side closing position, can cross the 1# air blast automatically when controlling automatically and open
Next.Need satisfy 7 unlatchings of air feed gate valve, TFK closure, Kpe this moment equally
The condition of normally opened contact closure.
When the superpressure overflow, the Kpc closure, system will by after open and stop principle earlier, in proper order
Subtract and stop air blast, drop to rated pressure, till promptly Kpc disconnects until blast.3. during the automatic control system fault:, mode can be changed open if the automatic control circuit breaks down
Close FZK and pull the left side open position, carry out unit and manually control.
Claims (3)
1. air supply system of jig in coal dressing plant, the air blast (2) that comprises at least two air feeds in parallel, the air inlet of every air blast (2) is connected with air inlet muffler (1), the air outlet of every air blast (2) is through going out damper (4), air outlet muffler (5) is connected with blast main, blast main is connected with air accumulator (6), air accumulator (6) is connected with jigging machine through jigging machine air feed gate valve (7), system also comprises electric control system, it is characterized in that: the exit of every air blast (2) is equipped with the non-return valve (3) as isolated component between system and the air blast (2), is connected with the big flow safety overflow valve of low pressure (10) as system's pressurize element on the blast main; Its electric control system is to be the automaton of core with the programmable controller; the binding post of the input module of programmable controller (M1) is connected with following control or sense switch through holding wire: the electrical control that A. is located at automaton cashier's office in a shop: a. is used for unit control and many mode change-over switches (FZK) changed of control automatically; b. the fault that is used for the closing fault air blast stops to cross switch (1GTK～4GTK); the start button switch that the startup air blast was used when c. unit was controlled (1QA～4QA); the stop button switch that the machine of turning off the blast was used when d. unit was controlled (1TA～4TA); B. being located at every air blast goes out on the damper (4): when go out to send after damper (4) is opened signal make this air blast enter the damper protection switch that goes out that accurate starting state uses (1BK～4BK), C. is located on the big flow safety overflow valve of low pressure (10): a. sends increase air blast signal when the blast main blast does not reach rated pressure; when total wind
Manage-style is pressed to send when reaching rated pressure and is stopped the rated pressure control that the air blast signal is used
Switch (Kpe), b. send when the blast main blast surpasses rated pressure and subtract out the superpressure limit that the air blast signal is used
Bit switch (Kpc), D. are located on the jigging machine air feed gate valve (7):
After opening, jigging machine air feed gate valve make air blast enter the air feed gate valve that accurate starting state is used
Open sense switch (TFK), E. is located on the jigging machine hilllock point:
Control adopts automatic program control or locking to control the post latch switch (GBK) of usefulness automatically;
The binding post of the output module of programmable controller (M2) is through control line and each air blast
(the start-up control loop of D1～D4) is connected motor.
2. air supply system of jig in coal dressing plant according to claim 1 is characterized in that: the programmable controller of said automaton is connected with control microcomputer (18).
3. air supply system of jig in coal dressing plant according to claim 1 is characterized in that: the big flow safety overflow valve of said low pressure (10) comprises the valve body (21) of cylinder sleeve type, spool (22), silencer cover (23), the balancing weight (26) of the interior Direct Action Type of valve body; Valve body (21) top is standing portion, the inward flange that one circle level is arranged on this inwall, laying spool (22) on the inward flange, lip ring (32) is arranged between inward flange and the spool (22), spool (22) can slide up and down along the tube wall of valve body (21) inward flange with top, have exhaust outlet (34) on the tube wall of valve body (21) inward flange with top, the outer silencer cover (23) that is equipped with of exhaust outlet (34), Pressure gauge (33) is installed on the tube wall of inward flange with the lower part, the core hole is arranged at spool (22) top, lays the adjustable balancing weight of number (26) in the core hole; Be equipped with support (30) on spool (22) end face, when support (30) with spool (22) when sliding up and down, shake-up is arranged on rated pressure gauge tap Kpe (29), the superpressure limit switch Kpc (28) of valve body (21) top, makes it to send respectively and stop, subtract out the air blast signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93110292A CN1046101C (en) | 1993-03-04 | 1993-03-04 | Air supply system of jig in coal dressing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93110292A CN1046101C (en) | 1993-03-04 | 1993-03-04 | Air supply system of jig in coal dressing plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1085127A CN1085127A (en) | 1994-04-13 |
| CN1046101C true CN1046101C (en) | 1999-11-03 |
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ID=4988171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93110292A Expired - Fee Related CN1046101C (en) | 1993-03-04 | 1993-03-04 | Air supply system of jig in coal dressing plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046101C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530825B (en) * | 2009-04-17 | 2013-03-13 | 金易通科技(北京)股份有限公司 | A jigger magnetic suspension air valve and a driving method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4127480A (en) * | 1976-12-02 | 1978-11-28 | Damin Mineralien Gesellschaft Mit Beschrankter Haftung | Settling machine |
| US4394260A (en) * | 1980-10-15 | 1983-07-19 | Klockner-Humboldt-Deutz Ag | Control device for a rotary valve-controlled jigging machine |
| SU1466791A1 (en) * | 1987-07-06 | 1989-03-23 | Кузнецкий научно-исследовательский и проектно-конструкторский институт углеобогащения | Method of jigging |
-
1993
- 1993-03-04 CN CN93110292A patent/CN1046101C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4127480A (en) * | 1976-12-02 | 1978-11-28 | Damin Mineralien Gesellschaft Mit Beschrankter Haftung | Settling machine |
| US4394260A (en) * | 1980-10-15 | 1983-07-19 | Klockner-Humboldt-Deutz Ag | Control device for a rotary valve-controlled jigging machine |
| SU1466791A1 (en) * | 1987-07-06 | 1989-03-23 | Кузнецкий научно-исследовательский и проектно-конструкторский институт углеобогащения | Method of jigging |
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| Publication number | Publication date |
|---|---|
| CN1085127A (en) | 1994-04-13 |
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