CN1177655C - High-pressure water thermal-state descaling system of electro-hydraulic control unloading valve - Google Patents
High-pressure water thermal-state descaling system of electro-hydraulic control unloading valve Download PDFInfo
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- CN1177655C CN1177655C CNB011286067A CN01128606A CN1177655C CN 1177655 C CN1177655 C CN 1177655C CN B011286067 A CNB011286067 A CN B011286067A CN 01128606 A CN01128606 A CN 01128606A CN 1177655 C CN1177655 C CN 1177655C
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- pressure pump
- scaling
- descaling
- unloading valve
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Abstract
The invention relates to a high-pressure water thermal state descaling system for the ferrous metallurgy industry. The invention relates to a high-pressure water thermal state descaling system of an electro-hydraulic control unloading valve, which is designed for solving the problems of huge system, complex composition, low operation reliability, large investment and the like of the existing descaling system. When hot steel billets to be descaled enter the descaling box, the main controller closes the electro-hydraulic control unloading valve, and high-pressure water generated by the high-pressure pump descales the steel billets through the spray head; after the steel billet leaves the descaling box, the main controller opens the electro-hydraulic control unloading valve, the high-pressure pump is in an idle running state, the discharged water returns to the water tank through the electro-hydraulic control unloading valve, and the system completes a cycle. The descaling system has simple composition, short manufacturing and installation period, reliable operation and obvious energy-saving effect, and the investment is only 50 percent of that of the descaling system in the prior art.
Description
Technical field: the present invention relates to the industrial water under high pressure thermal-state descaling system of Ferrous Metallurgy, mainly is the selection and the configuration of equipment in the system.
Background technology: in Ferrous Metallurgy industry, for solving the surface quality problems of rolled products, brought into use water under high pressure thermal descaling technology, use the oxide layer (being commonly called as firecoat) that the water under high pressure of shower nozzle ejection washes away hot billet surface in the De-scaling box in the thermal-state descaling system that this technology sets up, to improve the surface quality of rolled products.At present, the configuration of technology maturation, and the basic equipment of the water under high pressure thermal-state descaling system that uses aborning both at home and abroad is as Fig. 2.When the hot steel billet 19 for the treatment of de-scaling enters De-scaling box 17, master controller sends instruction, open Scale removing valve 16, close circulating valve 12, high-pressure pump 13 is come and after the water under high pressure that produces of pressurizeing converges with the water under high pressure of energy-storage system steam accumulator 24 inflows minimum liquid level control valve 15 in by check valve 14 from water tank 11 suction, be ejected into the surface of steel billet 19 by Scale removing valve 16, shower nozzle 18, carry out de-scaling.When de-scaling is finished, after steel billet 19 left De-scaling box 17, master controller sent instruction, closed Scale removing valve 16 (at this moment, shower nozzle 18 is in the state of cutting off the water supply), the water yield that the water under high pressure that high-pressure pump 13 produces loses when steam accumulator 24 replenishes de-scaling through minimum liquid level control valve 15.When the water level in the steam accumulator 24 reached setting height, master controller sent instruction, opened circulating valve 12, and high-pressure pump 13 is in the low pressure recycle state, stopped to supply water to energy-storage system, and whole descaling system has just been finished a circulation.In this descaling system, minimum liquid level control valve 15 is in normally open when system works, during system stop de-scaling work or the water level in the steam accumulator 24 close when being reduced to lowest water level, its switching is by 22 controls of electromagnetic distribution device.The switching of circulating valve 12 and Scale removing valve 16 is by hydraulic pressure (or air pressure) stand electric liquid (or gas) the controls reversal valves 20 and 23 controls of 21 controls.In order to keep Installed System Memory the water under high pressure and the compressed air of some is arranged,, be provided with an energy-storage system of forming by steam accumulator 24, Compressed Air Energy Storage 25 and air compressor machine 26 etc. specially to guarantee the normal operation of system.
The major defect that above-mentioned water under high pressure thermal-state descaling system exists is: system is huge, and investment is big; System's composition link is many, operation control is complicated, and reliability is lower; The special energy-storage system that is provided with is high-risk pressure vessel, and specification requirement and management expectancy height have carelessness slightly, can cause security incident.
Summary of the invention: the present invention is that the said system that existing water under high pressure thermal-state descaling system exists is huge, investment is big, it is complicated to form, operational reliability is low in order to solve, have problem such as potential safety hazard, provide a kind of composition simple, operational reliability and efficient height, the manufacturing installation period is short, the brand-new water under high pressure thermal-state descaling system of reduced investment.
For realizing goal of the invention, the technical solution used in the present invention is: whole system is by master controller, the high-pressure pump that water inlet is connected with the delivery port of water tank, delivery port is connected with the shower nozzle of De-scaling box, the electric hydraulic unloading valve that water inlet is connected with the delivery port of high-pressure pump, delivery port is connected with water tank is controlled Hydraulic Station and solenoid directional control valve composition that electric hydraulic unloading valve opens and closes.When treating that the hot steel billet of de-scaling enters De-scaling box for first, master controller sends instruction, closes electric hydraulic unloading valve, starts high-pressure pump, and the water under high pressure that high-pressure pump produces hits billet surface by shower nozzle, carries out de-scaling; After steel billet leaves De-scaling box, master controller sends instruction, open electric hydraulic unloading valve, high-pressure pump is in the no-load running state, and the water that high-pressure pump is discharged returns water tank by electric hydraulic unloading valve, and system finishes first circulation, after last piece steel billet leaves De-scaling box, master controller sends instruction, opens electric hydraulic unloading valve, left alone without help high-pressure pump down.
The present invention also can connect the variable-frequency governor of adjusting its rotating speed on high-pressure pump, utilize the rotating speed of adjusting high-pressure pump, adjusts its discharge, to adapt to the de-scaling needs to the different specification size steel billet.
Advantage of the present invention is: whole system is formed extremely simple, and under system running state, master controller only need be controlled an open and close circulation of electric hydraulic unloading valve, can finish an operation circulation of whole system.And can keep shower nozzle not cut off the water supply all the time, eliminated prior art and started next operation circulation time, the equipment judder that water under high pressure causes the unexpected impact of pipeline.The switching of electricity hydraulic unloading valve is finished by Hydraulic Station control solenoid directional control valve, move extremely reliably, so the operational reliability and the efficient of whole descaling system improves greatly, guaranteed scale removal effect.Adopt variable-frequency governor to adjust the high-pressure pump rotating speed in the system, make system can meet the needs of the de-scaling of the various steel billets of different discharges, increased the utilization scope and the effect of system.Particularly system's investment reduces greatly, and investment only is 50% of prior art system investment, makes installation period and also shortens greatly.
Description of drawings:
Fig. 1 is that descaling system of the present invention is formed allocation plan;
Fig. 2 is that the descaling system of prior art is formed allocation plan.
The specific embodiment: the present invention is described in further detail below in conjunction with drawings and Examples.
It is 150 * 150 * 3000～4500,150 * 200 * 3000～4500 that the present invention is designed for specification, and 200 * 200 * 3000～4500 square descaling of steel stock, pressure are 20MPa, and discharge is 45m
3During/h, the de-scaling time is 4 seconds, and the no-load running time is 26 seconds, and it is normal to have reached operation, and scale removal effect can satisfy the technology requirement fully.
Claims (2)
1. high-pressure water heat-state descaling system of electrohydraulic unloadinhg valve, comprise that water inlet is connected with the delivery port of water tank [3], the high-pressure pump [2] that delivery port is connected with the shower nozzle [5] of De-scaling box [6], treat that the hot steel billet of de-scaling [4] enters or own descaling steel billet sends the beginning de-scaling or stops the de-scaling job instruction when leaving De-scaling box [6], and send out the master controller of left alone without help high-pressure pump [2] instruction, it is characterized in that also comprising that water inlet is connected with the delivery port of high-pressure pump [2], the electric hydraulic unloading valve [7] that delivery port is connected with water tank [3], close electric hydraulic unloading valve [7] by the master controller instruction and make high-pressure pump [2] discharge water under high pressure carry out de-scaling to steel billet [4], perhaps open electric hydraulic unloading valve [7] and make the de-scaling of high-pressure pump [2] no-load running stop by shower nozzle [5], the solenoid directional control valve [8] and the Hydraulic Station [9] of water tank [3] returned in discharge water.
2. high-pressure water heat-state descaling system of electrohydraulic unloadinhg valve according to claim 1 is characterized in that also being connected with on the high-pressure pump [2] variable-frequency governor [1] of adjusting its rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011286067A CN1177655C (en) | 2001-09-20 | 2001-09-20 | High-pressure water thermal-state descaling system of electro-hydraulic control unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011286067A CN1177655C (en) | 2001-09-20 | 2001-09-20 | High-pressure water thermal-state descaling system of electro-hydraulic control unloading valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1404933A CN1404933A (en) | 2003-03-26 |
| CN1177655C true CN1177655C (en) | 2004-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011286067A Expired - Fee Related CN1177655C (en) | 2001-09-20 | 2001-09-20 | High-pressure water thermal-state descaling system of electro-hydraulic control unloading valve |
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| CN (1) | CN1177655C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497086B (en) * | 2009-03-06 | 2011-06-15 | 中冶赛迪工程技术股份有限公司 | High-pressure water descaling system |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411763C (en) * | 2005-12-09 | 2008-08-20 | 广东韶钢松山股份有限公司 | High-pressure water descaling system |
| CN100563862C (en) * | 2007-11-12 | 2009-12-02 | 二重集团（德阳）重型装备股份有限公司 | The high-pressure water descaling system of hot continuous rolling production line |
| EP2174729A1 (en) * | 2008-10-07 | 2010-04-14 | Siemens Aktiengesellschaft | Ignition device with pump drive with variable speed |
| CN102211100A (en) * | 2010-04-12 | 2011-10-12 | 上海海隆石油钻具有限公司 | Thickened pipe end outer surface descaling device |
| CN102259119A (en) * | 2010-05-24 | 2011-11-30 | 营口流体设备制造(集团)有限公司 | Automatic circulating water descaling system for hot-rolled wire rod steel |
| CN104438386B (en) * | 2014-11-21 | 2016-07-13 | 山东雷帕得汽车技术股份有限公司 | Few flat spring length cone rolling line high-pressure water descaling system |
| CN112246883A (en) * | 2020-08-26 | 2021-01-22 | 宝钢特钢韶关有限公司 | Rod and wire mill cooling water control device and method |
| CN114183483B (en) * | 2021-12-31 | 2024-08-02 | 富奥汽车零部件股份有限公司 | No-load unloading system and pump type retarder |
-
2001
- 2001-09-20 CN CNB011286067A patent/CN1177655C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497086B (en) * | 2009-03-06 | 2011-06-15 | 中冶赛迪工程技术股份有限公司 | High-pressure water descaling system |
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| CN1404933A (en) | 2003-03-26 |
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Addressee: Jiang Jin Document name: Deemed not to advise |
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| ASS | Succession or assignment of patent right |
Owner name: HUNAN NONFERROUS HEAVY MACHINERY CO., LTD. Free format text: FORMER OWNER: CHANGSHA MINE INST. Effective date: 20070824 |
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Effective date of registration: 20070824 Address after: 410013, Hunan Changsha high salary Development Zone torch city MO Group North five floor Patentee after: Hunan Nonferrous Heavy Machinery Co., Ltd. Address before: 410012 Hunan province Changsha Lushan Road No. 236 Patentee before: Changsha Mine Research Institute |
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