CN104263903A - Electrical control device for thick-wall steel tube thermal treatment production line - Google Patents
Electrical control device for thick-wall steel tube thermal treatment production line Download PDFInfo
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- CN104263903A CN104263903A CN201410507431.7A CN201410507431A CN104263903A CN 104263903 A CN104263903 A CN 104263903A CN 201410507431 A CN201410507431 A CN 201410507431A CN 104263903 A CN104263903 A CN 104263903A
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Abstract
The invention discloses an electrical control device for a thick-wall steel tube thermal treatment production line. The electrical control device comprises control cabinets, a field operation box and an upper computer, wherein the control cabinets are arranged at the periphery of the thick-wall steel tube production line and put in the same conjoined cabinet, and comprise a PLC cabinet, a frequency conversion cabinet, a temperature control cabinet and a master switch cabinet; the upper computer is connected to a CPU module in the PLC cabinet by virtue of an Ethernet cable to realize communication, and a button on an operation table of the upper computer is connected to the input end of the PLC cabinet by virtue of a hard wiring mode; the PLC cabinet is in series connected to the frequency conversion cabinet by virtue of a PROFIBUS-DP cable, and in series connected to the temperature control cabinet by virtue of a RS485 cable; the field operation box comprises a loading operation box and an unloading operation box, which are connected to the PLC cabinet by virtue of the hard wiring mode respectively; and the master switch cabinet is connected to each control cabinet by virtue of the hard wiring mode. The electrical control device is used for controlling by adopting a programmable controller system, adopts a PROFIBUS-DP network and Ethernet to guarantee the control process, and is beneficial to sharing information, reducing paving of electric cables and lowering a fault rate, capable of increasing the stability and the flexibility of the system by adopting centralized control, and convenient for system maintenance.
Description
Technical field
The invention belongs to field of electrical control, relate generally to a kind of electrical control gear of heat-treatment production line of drill bit for petroleum exploration pipe box (thick walled steel tube).
Background technology
Thick walled steel tube Control System for Heat Treatment is the control device of heat-treating thick walled steel tube, heats and cool in treating processes to thick walled steel tube, and the physical property of adjustment metal medium, plays a significant role at petroleum prospecting heat treatment industry.Its main processes is:
Feed mechanism-induction heating-Quench heating-go out shedding mechanism-profit groove quenching mechanism-control water lifting mechanism-receiving mechanism.
Thick walled steel tube is transmitted system by feed mechanism and drives, move into heating system, design temperature is heated to through heating system, enter Quench heating system heating subsequently to quenching temperature, through going out shedding mechanism steel pipe movement to profit groove quenching mechanism after coming out of the stove, cooled by hardening liquid, after being cooled to setting-up time, by control water lifting mechanism, steel pipe is promoted (in lifting process, in steel pipe, hardening liquid flows out) to receiving mechanism.
Current domestic thick walled steel tube heat treatment industry generally adopts traditional relay to control, and uses comparatively economic instrument to control furnace temperature, and thick walled steel tube transmission controls also to be that single common electric machine controls, and system is comparatively simple.Drive system controls to pull thick walled steel tube transmission for single motor, when having polylith material in quenching furnance, often there is the situation of hitting material, affect Disposal quality, reduce production efficiency, temperature controls independently to control for instrument, lower with level of integrated system, come out of the stove part by single electric machine control, to be come out of the stove speed by manual shift, complete treating processes.
Traditional circuit control mode is in operation and lacks stability, failure rate is higher, very flexible, traditional information transmission mode poor stability, malfunctioning node is many, operating device is comparatively simple, needs too much operator, adds human cost, single transmission controls to make thick walled steel tube, and product is single in process of production, extendability is bad, and the steel pipe of different size needs different production line, adds cost.Laying of a large amount of cable adds cost and maintenance cost.
Because the defect that above-mentioned existing thick walled steel tube Control System for Heat Treatment exists, the present inventor is based on being engaged in the practical experience and expertise that this type of product design manufacture enriches for many years, and coordinate the utilization of scientific principle, actively in addition research and innovation, to founding a kind of electric control system of novel thick walled steel tube heat-treatment production line, general existing thick walled steel tube Control System for Heat Treatment can be improved, make it have more practicality.Through constantly research, design, and through repeatedly studying sample and after improving, finally creating the present invention had practical value.
Summary of the invention
The object of the present invention is to provide a kind of operation, easy to maintenance, cost is lower, the electrical control gear of the good thick walled steel tube heat-treatment production line of versatility.
The object of the invention to solve the technical problems also realizes in addition by the following technical solutions.The electrical control gear of a kind of thick walled steel tube heat-treatment production line proposed according to the present invention, comprises housing, field operation box, upper computer; Wherein, housing is arranged on around thick walled steel tube production line, is positioned in same conjuncted cabinet, is respectively PLC cabinet, frequency conversion tank, temperature-controlling cabinet, master switch cabinet; This upper computer realizes communicating by Ethernet cable and the CPU module in PLC cabinet, and the button on its operator's console is connected to the input terminus of PLC cabinet by hard wired mode; This PLC cabinet is connected in series with frequency conversion tank by PROFIBUS-DP cable, is connected in series with temperature-controlling cabinet by RS485 cable; Field operation box is respectively material loading operation box 10, discharging operations case 11, is connected to PLC cabinet respectively by hardwire; This master switch cabinet is connected with each housing by hardwire.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The electrical control gear of aforesaid thick walled steel tube heat-treatment production line, wherein said PLC cabinet adopts siemens 300 series of PLC 315-2DP/PN central processing unit (CPU) module, provides Ethernet, PROFIBUS-DP network and RS485 network.
The electrical control gear of aforesaid thick walled steel tube heat-treatment production line, wherein said frequency conversion tank adopts siemens MM440 Series Frequency Converter, and above-mentioned frequency transformer is connected in series by PROFIBUS-DP cable.
The electrical control gear of aforesaid thick walled steel tube heat-treatment production line, wherein said frequency conversion tank has two, be respectively the first frequency conversion tank, the second frequency conversion tank, the input terminus of a frequency transformer wherein in the first frequency conversion tank is connected with the CPU module in PLC cabinet by PROFIBUS-DP cable.
The electrical control gear of aforesaid thick walled steel tube heat-treatment production line, each frequency transformer in the first wherein said frequency conversion tank only controls the variable-frequency motor that 1 is furnished with encoder, the variable-frequency motor of each Frequency Converter Control more than 1 of the second frequency conversion tank.
The electrical control gear of aforesaid thick walled steel tube heat-treatment production line, is provided with temperature control instrument in wherein said temperature-controlling cabinet, and above-mentioned temperature control instrument is connected in series by RS485 cable.
The electrical control gear of aforesaid thick walled steel tube heat-treatment production line, it is characterized in that wherein said temperature-controlling cabinet has four, be respectively the first temperature-controlling cabinet, the second temperature-controlling cabinet, the 3rd temperature-controlling cabinet, the 4th temperature-controlling cabinet, described four temperature-controlling cabinets serial connection, the input terminus of a temperature control instrument wherein in this first temperature-controlling cabinet is connected with the CPU module in PLC cabinet by RS485 cable.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, the electrical control gear of a kind of thick walled steel tube heat-treatment production line of the present invention is based on import electrical element, whole plant is controlled to change programable controller system into by the relay of former legacy equipment control, PROFIBUS-DP network and Ethernet is adopted to ensure control process, be beneficial to information sharing, what form that hard redundancy can be more timely, accurate, safe delivers to upper computer by on-site signal, reduce the laying of cable, reduce failure rate, centralized Control is used to add stability, the handiness of system, be convenient to system maintenance, reduce production cost.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technique means of the present invention can be better understood, and can be implemented according to the content of specification sheets, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the equipment connection schematic diagram of present pre-ferred embodiments.
[primary symbols explanation]
1: upper computer 2:PLC cabinet
3: the first frequency conversion tank 4: the second frequency conversion tank
5: the first temperature-controlling cabinet 5: the second temperature-controlling cabinets
7: the three temperature-controlling cabinet 8: the four temperature-controlling cabinets
9: master switch cabinet 10: material loading operation box
11: discharging operations case 12: conjuncted cabinet
13: industrial computer 14: indicating meter
15:CPU module 16: frequency transformer
17: temperature control instrument 18: power regulating eqiupment
19: isolating switch 20: the variable-frequency motor being furnished with encoder
21: variable-frequency motor 22: thermopair
23: heating tube 24: Ethernet cable
25:PROFIBUS-DP cable 26:RS485 cable
Embodiment
For further setting forth the present invention for the technique means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of electrical control gear of thick walled steel tube heat-treatment production line proposed according to the present invention, structure, feature and effect thereof, be described in detail as follows.
Refer to Fig. 1, the electrical control gear of a kind of thick walled steel tube heat-treatment production line of the present invention, comprises eight housings, two field operation boxes, a upper computer 1.Wherein, eight housings are positioned in same conjuncted cabinet 12, be followed successively by PLC cabinet 2, first frequency conversion tank 3, second frequency conversion tank 4, first temperature-controlling cabinet 5, second temperature-controlling cabinet 6, this upper computer 1 of 3rd temperature-controlling cabinet 7, the 4th temperature-controlling cabinet 8, master switch cabinet 9. realizes communicating with the CPU module 15 in PLC cabinet 2 by Ethernet cable 24, realizes the monitoring to field apparatus, data logging, historical query, warning inquiry; Button on its operator's console is connected to PLC cabinet 2 by hard wired mode, can the startup of the on-the-spot all electric machines for roller of Non-follow control, stopping and reversion.This PLC cabinet 2 is connected in series with the first frequency conversion tank 3, second frequency conversion tank 4 by PROFIBUS-DP cable 25, and is connected in series with the first temperature-controlling cabinet 5, second temperature-controlling cabinet 6, the 3rd temperature-controlling cabinet 7, the 4th temperature-controlling cabinet 8 by RS485 cable 26.Two field operation boxes are respectively material loading operation box 10, discharging operations case 11, are connected to PLC cabinet 2 respectively by hardwire.Described master switch cabinet 9 is connected with each housing by hardwire.
Preferably, this upper computer 1 (magnificent industrial computer 13 and Samsung indicating meter 14 are ground in employing) has Non-follow control, automatically controls two kinds of patterns.Under MANUAL CONTROL mode, user's inching button on upper computer 1 operator's console can realize corresponding function.Under automatic control mode, user is according to the processing parameter of the length wall thickness setting production line of different thick walled steel tube, and as the parameter such as Heating temperature, roller table speed, crawl auto-start button on upper computer 1 picture, starts, completely automatically without the need to manual work.The processing parameter set also can be saved to upper computer by user, directly calls when producing the thick walled steel tube of same size.
Preferably, comprise two AC380 in this PLC cabinet 2 and become AC220 transformer (2KVA), for providing stable alternating-current for ac control circuit and direct supply; Two AC220 limits DC24 direct supply (5A), for providing galvanic current source for DC control circuit, Site Detection switch, PLC; A siemens 300 series of PLC 315-2DP/PN CPU module 15, for the logic control of equipment provides reliable guarantee, Ethernet, PROFIBUS-DP network, RS485 network are provided, digital quantity input signal has the control signal of button, the feedback signal of switch, the overload signal etc. of thermo-relay, digital output signal has pilot lamp signal, on-the-spot magnetic valve signal etc.
Preferably, in the first frequency conversion tank 3, second frequency conversion tank 4,6 siemens MM440 Series Frequency Converter 16 are respectively installed.Above-mentioned frequency transformer 16 adopts PROFIBUS-DP cable 25 to be connected in series, the input terminus of a frequency transformer 16 in the first frequency conversion tank 3 that its middle distance PLC cabinet 2 is nearer adopts PROFIBUS-DP cable 25 to be connected with the CPU module 15 in PLC cabinet 2, realize the serial connection of PLC cabinet 2, first frequency conversion tank 3, second frequency conversion tank 4, guarantee every platform frequency transformer 16 all by PROFIBUS-DP network reception to corresponding start stop signal and speed signal.Wherein, the first frequency conversion tank 3 controls furnace delivery table, and because furnace delivery table needs precisely to control and location, the every platform frequency transformer 16 in this first frequency conversion 3 controls the variable-frequency motor 20 that is furnished with encoder.Frequency transformer employing one in this second frequency conversion tank 4 is dragged multi-control, and every platform frequency transformer 16 exports the variable-frequency motor 21 of more than 1 to.Meanwhile, because the first frequency conversion tank 3, second frequency conversion tank 4 distance field is more than 50 meters, should designs and increase frequency transformer 16 out put reactor, extend the effective propagation path of frequency transformer 16.
Preferably, two temperature control instruments 17 (as conduction SR93 series) and two power regulating eqiupments 18 (as outstanding person pauses JS3K series) are installed in each temperature-controlling cabinet.Above-mentioned temperature control instrument 17 adopts RS485 cable 26 to be connected in series, the input terminus of a temperature control instrument 17 in the first temperature-controlling cabinet 5 that its middle distance PLC cabinet 2 is nearer is connected with the CPU module 15 in PLC cabinet 2 by RS485 cable 26, realize the serial connection of PLC cabinet and each temperature-controlling cabinet, guarantee that the design temperature signal that PLC cabinet 2 sends can be sent to each temperature-controlling cabinet.Temperature control instrument 17 simultaneously in each temperature-controlling cabinet adopts hardwire to be connected with on-the-spot thermopair 22, the feedback temperature signal accepting on-the-spot thermopair 22 respectively and the design temperature signal of PLC cabinet 2 arrived by RS485 network reception, realize the closed-loop control of temperature, its output terminal is connected with power regulating eqiupment 18; This power regulating eqiupment 18 accepts the analog signals (4-20MA) that temperature control instrument 17 exports, and according to the heating power of this signal control on-the-spot each district heating tube 23.
Preferably, aforesaid master switch cabinet 9 is provided with isolating switch 19 (as Shanghai People's 1200A frame circuit breaker), by the bus crossbeam be arranged on each cupboard, busbar power supply is delivered to each housing.
In actual job, eight housings are positioned in same conjuncted cabinet 12, be arranged on around thick walled steel tube production line, upper computer 11 is placed on around PLC cabinet 2, material loading operation box 10 is positioned over around feed mechanism, discharging operations case 11 is placed on around shedding mechanism, and described cable can be embedded in cable trench.This electrical control gear can adopt Non-follow control respectively, automatically control two kinds of patterns.
Under MANUAL CONTROL mode, if field operation box is set to regard to ground mode, crawl material loading operation box 10, on discharging operations case 11 corresponding function button after can receive corresponding signal in PLC cabinet 2, and according to the state of the signal after process via each frequency transformer 16 of PROFIBUS-DP network control, thus control the variable-frequency motor 20 being furnished with encoder of on-the-spot respective regions respectively, variable-frequency motor 21, the temperature signal simultaneously upper computer 1 set is sent to PLC cabinet 2 via Ethernet, and by each temperature control instrument 17 of RS485 network control after processing via PLC cabinet 2, each temperature control instrument 17 exports analog signals to power regulating eqiupment 18, thus control the heating tube 23 of on-the-spot respective regions respectively, if field operation box is set to remote mode, now material loading operation box 10, button on discharging operations case 11 is by inoperative, operating personnel can set the technological coefficient of production line on the operator's console of upper computer 1 according to the length wall thickness of different thick walled steel tube, input Heating temperature, the parameters such as roller table speed, and corresponding parameter signal is sent to PLC cabinet 2 through Ethernet, according to the signal PLC cabinet 2 after process respectively via PROFIBUS-DP network, each frequency transformer 16 of RS485 network control, the state of temperature control instrument 17, thus control the variable-frequency motor 20 being furnished with encoder in on-the-spot each district accurately, variable-frequency motor 21, heating tube 23, complete the heat treatment operation of thick walled steel tube efficiently.
Under automatic control mode, according to upper computer 1 operator's console sets or the production technique coefficient that is kept in upper computer 1, only need on picture after crawl auto-start button, each control device can start completely voluntarily according to corresponding processing parameter, without the need to manual operation, complete the heat treatment operation of thick walled steel tube efficiently.
In sum, according to described technical scheme, the present invention is based on import electrical element, whole plant is controlled to change programable controller system into by the relay of former legacy equipment control, PROFIBUS-DP network and Ethernet is adopted to ensure control process, be beneficial to information sharing, what form that hard redundancy can be more timely, accurate, safe delivers to upper computer 1 by on-site signal, reduce the laying of cable, reduce failure rate, use centralized Control to add stability, the handiness of system, be convenient to system maintenance, reduce production cost.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (7)
1. an electrical control gear for thick walled steel tube heat-treatment production line, is characterized in that comprising housing, field operation box, upper computer;
Wherein, housing is arranged on around thick walled steel tube production line, is positioned in same conjuncted cabinet, is respectively PLC cabinet, frequency conversion tank, temperature-controlling cabinet, master switch cabinet; This upper computer realizes communicating by Ethernet cable and the CPU module in PLC cabinet, and the button on its operator's console is connected to PLC cabinet by hard wired mode; This PLC cabinet is connected in series with frequency conversion tank by PROFIBUS-DP cable, is connected in series with temperature-controlling cabinet by RS485 cable; Field operation box is respectively material loading operation box 10, discharging operations case 11, is connected to PLC cabinet respectively by hardwire; This master switch cabinet is connected with each housing by hardwire.
2. the electrical control gear of thick walled steel tube heat-treatment production line according to claim 1, it is characterized in that wherein said PLC cabinet adopts siemens 300 series of PLC 315-2DP/PN central processing unit (CPU) module, Ethernet, PROFIBUS-DP network and RS485 network are provided.
3. the electrical control gear of thick walled steel tube heat-treatment production line according to claim 1, it is characterized in that wherein said frequency conversion tank adopts siemens MM440 Series Frequency Converter, above-mentioned frequency transformer is connected in series by PROFIBUS-DP cable.
4. the electrical control gear of thick walled steel tube heat-treatment production line according to claim 3, it is characterized in that wherein said frequency conversion tank has two, be respectively the first frequency conversion tank, the second frequency conversion tank, the input terminus of a frequency transformer wherein in the first frequency conversion tank is connected with the CPU module in PLC cabinet by PROFIBUS-DP cable.
5. the electrical control gear of thick walled steel tube heat-treatment production line according to claim 4, it is characterized in that each frequency transformer in the first wherein said frequency conversion tank only controls the variable-frequency motor that 1 is furnished with encoder, the variable-frequency motor of each Frequency Converter Control more than 1 of the second frequency conversion tank.
6. the electrical control gear of thick walled steel tube heat-treatment production line according to claim 1, it is characterized in that being provided with temperature control instrument in wherein said temperature-controlling cabinet, above-mentioned temperature control instrument is connected in series by RS485 cable.
7. the electrical control gear of thick walled steel tube heat-treatment production line according to claim 6, it is characterized in that wherein said temperature-controlling cabinet has four, be respectively the first temperature-controlling cabinet, the second temperature-controlling cabinet, the 3rd temperature-controlling cabinet, the 4th temperature-controlling cabinet, described four temperature-controlling cabinets serial connection, the input terminus of a temperature control instrument wherein in this first temperature-controlling cabinet is connected with the CPU module in PLC cabinet by RS485 cable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410507431.7A CN104263903A (en) | 2014-09-28 | 2014-09-28 | Electrical control device for thick-wall steel tube thermal treatment production line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410507431.7A CN104263903A (en) | 2014-09-28 | 2014-09-28 | Electrical control device for thick-wall steel tube thermal treatment production line |
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| CN104263903A true CN104263903A (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410507431.7A Pending CN104263903A (en) | 2014-09-28 | 2014-09-28 | Electrical control device for thick-wall steel tube thermal treatment production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613883A (en) * | 2018-12-19 | 2019-04-12 | 江苏亨通高压海缆有限公司 | Conductor water-blocking control system for submarine cable |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661420Y (en) * | 2003-10-23 | 2004-12-08 | 广州亚陆控制系统有限公司 | Electrical control gear of extrusion machine |
| JP2006281300A (en) * | 2005-04-04 | 2006-10-19 | Nippon Steel Corp | Cooling control method, device, and computer program |
| CN101436068A (en) * | 2008-12-01 | 2009-05-20 | 烟台鲁宝钢管有限责任公司 | Apparatus and method for displaying annular furnace distribution status |
| CN201464909U (en) * | 2009-08-11 | 2010-05-12 | 天津赛瑞机器设备有限公司 | Core rod pressure flattening machine control system based on PLC |
| CN201922110U (en) * | 2010-12-16 | 2011-08-10 | 济南玛钢钢管制造有限公司 | Automatic blanking machine for steel pipes |
| CN204111832U (en) * | 2014-09-28 | 2015-01-21 | 洛阳新思路电气股份有限公司 | The electrical control gear of thick walled steel tube heat-treatment production line |
-
2014
- 2014-09-28 CN CN201410507431.7A patent/CN104263903A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661420Y (en) * | 2003-10-23 | 2004-12-08 | 广州亚陆控制系统有限公司 | Electrical control gear of extrusion machine |
| JP2006281300A (en) * | 2005-04-04 | 2006-10-19 | Nippon Steel Corp | Cooling control method, device, and computer program |
| CN101436068A (en) * | 2008-12-01 | 2009-05-20 | 烟台鲁宝钢管有限责任公司 | Apparatus and method for displaying annular furnace distribution status |
| CN201464909U (en) * | 2009-08-11 | 2010-05-12 | 天津赛瑞机器设备有限公司 | Core rod pressure flattening machine control system based on PLC |
| CN201922110U (en) * | 2010-12-16 | 2011-08-10 | 济南玛钢钢管制造有限公司 | Automatic blanking machine for steel pipes |
| CN204111832U (en) * | 2014-09-28 | 2015-01-21 | 洛阳新思路电气股份有限公司 | The electrical control gear of thick walled steel tube heat-treatment production line |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613883A (en) * | 2018-12-19 | 2019-04-12 | 江苏亨通高压海缆有限公司 | Conductor water-blocking control system for submarine cable |
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Application publication date: 20150107 |