CN210623280U - Energy-saving blast furnace hot blast stove hydraulic control system - Google Patents
Energy-saving blast furnace hot blast stove hydraulic control system Download PDFInfo
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- CN210623280U CN210623280U CN201921334857.1U CN201921334857U CN210623280U CN 210623280 U CN210623280 U CN 210623280U CN 201921334857 U CN201921334857 U CN 201921334857U CN 210623280 U CN210623280 U CN 210623280U
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Abstract
The utility model relates to an energy-saving hydraulic control system of a blast furnace hot blast stove, which belongs to the technical field of metallurgical machinery and comprises a control module, at least one hydraulic device, an oil supply loop and an oil return loop which are connected with the hydraulic device; the hydraulic oil source device and the pressure sensor are sequentially arranged on the oil supply loop, the proportional overflow valve is arranged on the oil return loop, and the electromagnetic directional valve is connected to the hydraulic equipment; the hydraulic oil source device comprises a fixed displacement pump and a servo motor for providing power for the fixed displacement pump; the servo motor drives the constant delivery pump to supply oil for the hydraulic equipment, and the control module controls the rotating speed of the servo motor and the oil return back pressure of the proportional overflow valve according to the signal input of the upper computer and the pressure sensor. This application replaces traditional choke valve control circuit through the pump accuse volume speed governing control circuit that adopts servo motor control constant delivery pump, has reduced the energy loss of system and has generated heat, has solved the high problem of hydraulic control system energy consumption among the prior art.
Description
Technical Field
The utility model belongs to the technical field of metallurgical machinery, a energy-saving blast furnace hot blast stove hydraulic control system is related to, especially relate to a hydraulic system who is fit for only one equipment action in same time.
Background
The blast furnace hot blast stove is used for heating blast air to required temperature so as to improve the benefit and efficiency of the blast furnace, and is an important component of an iron-making unit. The hot blast stove realizes the functions of combustion, heat storage, air supply and the like by opening and closing and adjusting each valve, obtains high air temperature for keeping the heat storage effect, cannot be stopped before being scrapped, and must be in a working state or a temperature maintaining state, so the valve must be capable of acting at any time. The valves of most hot blast stoves at home and abroad are driven by a hydraulic system.
The valves of the hot blast furnaces comprise a hot blast valve, a cold blast valve, a flue valve, a mixed air stop valve, a backflow damping-down valve and the like according to different functions, the valve types mainly comprise a butterfly valve, a gate valve, a ball valve and the like, and each blast furnace comprises a plurality of hot blast furnaces, so that the hot blast furnaces of each blast furnace comprise dozens of valves with different sizes, different load conditions and different action requirements; meanwhile, because the hot blast stove burns coal gas which can not be mixed with oxygen in air at all, and the danger is high, the actions of the valves of the hot blast stove are in sequence, and no more than one valve acts simultaneously in the same time. Aiming at the process requirements and the particularity of the metallurgical industry, a hot blast stove hydraulic system is required to continuously work for 24 hours under normal conditions.
At present, a hot blast stove hydraulic system used at home and abroad usually adopts a constant-pressure variable pump as a pump source, the pump can continuously provide pressure oil to realize the opening and closing of a valve of the hot blast stove, the constant-pressure variable pump keeps the set highest pressure in the gap period of the action of an external valve, namely when the valve does not act, the inclination angle of a swash plate is changed under the action of a variable mechanism, so that the flow output only maintains the leakage flow, and the energy-saving effect is achieved; when the high-pressure oil works, the high-pressure oil is controlled by reversing, throttling and pressure maintaining of a hydraulic control loop on the hydraulic valve station, so that the high-pressure oil plays a role in opening or closing air or other medium pipeline passages and is kept in an opening or closing state when necessary.
The control mode is used for years so far, and can basically meet the process requirements of the hot blast stove system. The valves of the hot blast stove system are not in a type, and in order to adapt to the valves with the largest load, the system pressure must be adjusted to be about 12-16 MPa; the adjustment of oil inlet and return throttling needs to be paid attention to when the load force is small or a loaded valve is in the opening and closing action process, so that the overpressure of a rod cavity is avoided; therefore, the requirement of pressure load matching makes the labor cost of system design investment and equipment debugging unable to be reduced, and the energy consumption during valve action is inevitable due to throttling control. In addition, the system also has the defects of large reversing impact, incapability of adaptively adjusting the action speed after the external temperature changes or the equipment load condition changes and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present application is to provide an energy-saving hydraulic control system for a blast furnace hot blast stove, in which a conventional throttle valve control circuit is replaced by a pump-controlled volume speed regulation control circuit for controlling a constant delivery pump by a servo motor, so as to reduce energy consumption and heat generation of the system, and solve the problem of high energy consumption of the hydraulic control system in the prior art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a hydraulic control system of an energy-saving blast furnace hot blast stove comprises a control module, at least one hydraulic device, an oil supply loop and an oil return loop, wherein the oil supply loop and the oil return loop are connected to the hydraulic device; the hydraulic equipment is connected with an electromagnetic directional valve; the oil supply loop is sequentially provided with a hydraulic oil source device and a pressure sensor, and the oil return loop is provided with a proportional overflow valve; the hydraulic oil source device comprises a fixed displacement pump and a servo motor for providing power for the fixed displacement pump; and the proportional overflow valve, the electromagnetic directional valve and the servo motor are all electrically connected with and controlled by the control module.
Optionally, the system further comprises an accident accumulator assembly, wherein a pressure oil port of the accident accumulator assembly is connected to an oil outlet of the fixed displacement pump, and an oil return port of the accident accumulator assembly is connected to a main oil return loop or a direct oil return tank of the system.
Optionally, the control module includes a servo motor driver and a programmable controller, the servo motor driver is electrically connected to the servo motor, and the proportional overflow valve, the electromagnetic directional valve, and the servo motor driver are all electrically connected to the programmable controller.
Optionally, an oil return check valve is arranged on an oil return port of the electromagnetic directional valve.
Optionally, a ball valve for controlling the on-off of the loop is further arranged on the oil inlet of the electromagnetic directional valve.
Optionally, the hydraulic device is any one of a butterfly valve cylinder, a ball valve cylinder and a gate valve cylinder, and the electromagnetic directional valve is a two-position four-way electromagnetic directional valve.
Optionally, the hydraulic device is a weighted gate valve cylinder or a loaded gate valve cylinder.
Optionally, the electromagnetic directional valve is a three-position four-way electromagnetic directional valve.
Optionally, the middle position of the three-position four-way electromagnetic directional valve is decompressed, and hydraulic control one-way valves are arranged on an oil inlet and an oil return port of the hydraulic equipment.
Optionally, the control module is connected to a temperature sensor for measuring an ambient temperature, and the control module changes the rotation speed of the servo motor and the back pressure of the proportional relief valve according to a change of the ambient temperature.
Optionally, at least two hydraulic devices are connected in parallel, and the hydraulic devices sequentially act according to a predetermined sequence.
The beneficial effects of the utility model reside in that:
1. the utility model changes the traditional throttling speed regulation control into pump control volume speed regulation control, namely, the pressure required by the equipment load is large, the pump outlet provides large pressure, and the energy loss and the heating of the system are greatly reduced; partial system can reduce the power of the cooling unit or completely eliminate the cooling unit, simplify the hydraulic control system and reduce the equipment cost.
2. The utility model discloses can require intelligent control flow and pressure to match according to the action of the hydro-cylinder of different hydraulic equipment in the system or motor, the action characteristics of every equipment of more laminating can effectively avoid having the pole chamber superpressure, can realize the action and open the speed slope control when stopping, and control portably.
3. The utility model provides a hydraulic pressure valve station has cancelled all throttle speed governing components, has simplified the structure of valve station, has reduced equipment cost, and the debugging is upgraded into "control panel operation" by traditional "spanner operation" with maintaining, has saved the manpower, has reduced intensity of labour.
4. The utility model discloses can realize hydraulic system's intellectuality and remote control, make hydraulic system's control simple and convenient more, the pressure of hydraulic pressure oil source device oil-out can be according to temperature, the adaptation of load condition change, also is convenient for implant failure diagnosis system, and the lubricated condition or the part trouble of judgement equipment are come according to load pressure's change.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of the hydraulic control system of the energy-saving blast furnace hot blast stove of the utility model.
Reference numerals: the hydraulic control system comprises a fixed displacement pump 1, a servo motor 2, a servo motor driver 3, a programmable controller 4, a pressure sensor 5, a proportional overflow valve 6, a hydraulic valve station 7, a ball valve 7001, an oil return check valve 7002, an oil supply check valve 7003, a two-position four-way electromagnetic directional valve 7004, a three-position four-way electromagnetic directional valve 7005, a hydraulic control check valve 7006, an accident energy accumulator assembly 8, an energy accumulator body 8001, a cartridge valve 8002, a top-mounted electromagnetic valve 8003, a one-way throttle valve 8004, a butterfly valve or ball valve cylinder 9, a gate valve cylinder 10 with a balance weight and a gate valve cylinder 11 with a load.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Example (b): referring to fig. 1, the energy-saving hydraulic control system for the blast furnace hot blast stove comprises a control module, an accident energy accumulator assembly 8, at least two hydraulic devices, an oil supply loop and an oil return loop, wherein the oil supply loop and the oil return loop are connected to the hydraulic devices; the hydraulic equipment is a butterfly valve or ball valve oil cylinder 9; the hydraulic devices are connected in parallel; the hydraulic equipment is connected with an electromagnetic reversing valve, the electromagnetic reversing valve is used for controlling the moving direction of a piston rod of the hydraulic equipment, and the electromagnetic reversing valve is a two-position four-way electromagnetic reversing valve 7004; a hydraulic oil source device and a pressure sensor 5 are sequentially arranged on the oil supply loop, and a proportional overflow valve 6 is arranged on a main oil return loop of the oil return loop; the hydraulic oil source device comprises a fixed displacement pump 1 and a servo motor 2 for providing power for the fixed displacement pump; the control module comprises a servo motor driver 3 and a programmable controller 4, the servo motor driver 3 is electrically connected with the servo motor 2, and the proportional overflow valve 6, the electromagnetic directional valve and the servo motor driver 3 are all electrically connected with and controlled by the programmable controller 4; the pressure oil port P of the accident accumulator assembly 8 is connected to the oil outlet of the fixed displacement pump 1, and the oil return port thereof is connected to the main oil return loop or the direct oil return tank of the oil return loop.
In the embodiment, taking a hot blast stove hydraulic system as an example, an energy-saving hydraulic control system with a pump control volume speed regulation function is adopted, and an accident energy accumulator assembly 8 comprises an energy accumulator body 8001, a cartridge valve 8002 with a top-mounted solenoid valve 8003 and a one-way throttle valve 8004; the hydraulic valve station 7 comprises an electromagnetic reversing valve, a hydraulic control one-way valve 7006, an oil return one-way valve 7002, an oil supply one-way valve 7003 and a ball valve 7001.
Further, the hydraulic equipment is a cylinder 10 with a counterweight gate valve.
Further, the hydraulic equipment is a cylinder 11 with a load gate valve.
Further, the electromagnetic directional valve is a three-position four-way electromagnetic directional valve 7005.
Further, the middle position of the three-position four-way electromagnetic reversing valve 7005 is decompressed, and hydraulic control one-way valves 7006 are arranged on an oil inlet and an oil return port of the hydraulic equipment.
In order to prevent the hydraulic oil reverse flow in fuel feeding return circuit and the oil return circuit, the utility model discloses be provided with oil return check valve 7002 on the oil return opening of solenoid directional valve, be provided with oil feed check valve 7003 at two four-way solenoid directional valve 7004's oil inlet.
In order to facilitate the overhaul and maintenance of the hydraulic circuit, a ball valve 7001 for controlling the on-off of the circuit is also arranged on the oil inlet of the electromagnetic reversing valve.
The utility model controls the rotating speed of the servo motor 2 by the servo motor driver 3; the control signal of the servo motor driver 3 is provided by a programmable controller 4, and the programmable controller 4 can receive the signal input of an upper computer and a pressure sensor 5 and control the rotating speed of the servo motor 2 and the oil return back pressure of a proportional overflow valve 6 according to the programmed setting.
The utility model discloses well hydraulic valve station 7 no longer sets up any throttle or governing valve, but the valves still possesses functions such as switching-over, pressurize. Different superposed valve groups are respectively arranged according to the action requirements of different valves: the hydraulic control valve 7006 comprises a ball valve 7001 at the pressure oil inlet side of each valve group, an oil return side oil return one-way valve 7002, an oil supply one-way valve 7003 in front of a port P of a two-position four-way electromagnetic reversing valve 7004, and a hydraulic control one-way valve 7006 connected with a port A, B of the three-position four-way electromagnetic reversing valve 7005.
The utility model discloses a concrete working process as follows:
referring to fig. 1, when a hydraulic valve of a hot blast stove needs to be operated, taking a butterfly valve or a ball valve cylinder 9 in the figure as an example, when the valve needs to be opened, an upper computer gives a signal, a two-position four-way electromagnetic reversing valve 7004 is powered, the electromagnetic reversing valve is reversed to a right station, high-pressure oil high-pressure hydraulic oil passes through a ball valve 7001, a one-way valve 7003 and a port P of the two-position four-way electromagnetic reversing valve 7004 to a port A, and enters a rodless cavity of the butterfly valve or the ball valve cylinder 9; hydraulic oil in a rod cavity of the oil cylinder flows from a port B to a port T of the two-position four-way electromagnetic reversing valve 7004 and returns through the proportional overflow valve 6; meanwhile, the upper computer sends a valve action identification signal to the programmable controller 4, and the programmable controller 4 controls the rotating speed of the servo motor 2 to increase to a set value V according to a slope according to the programmed setting1And controlling the oil return back pressure of the proportional overflow valve 6, extending the oil cylinder at a determined speed, and opening the valve; due to the fact thatThe loop of the rodless cavity of the oil cylinder is not subjected to throttling control, the pressure loss along the way is ignored, and as long as the pressure at the outlet of the pump does not exceed the highest pressure set by the pressure sensor 5, the pressure at the outlet of the pump is the sum of the pressure required by the load and the oil return back pressure, so that the useless energy consumption in the action process of the oil cylinder is only the oil return back pressure of the proportional overflow valve 6, and the back pressure is usually much lower than the back pressure of oil return throttling, so that the energy consumption in the action process of the; before the valve is completely opened, the upper computer determines that the action of the oil cylinder is to be in place according to a limit switch signal on the oil cylinder and transmits the signal to the programmable controller 4, and the programmable controller 4 gradually reduces the rotating speed of the servo motor 2 to V through the servo motor driver 32A speed slope is formed, so that the impact of the oil cylinder during the stop is greatly relieved; after the valve is opened, the servo motor 2 and the pressure sensor 5 form pressure feedback, a low rotating speed is maintained, the constant pressure is kept at the outlet of the constant delivery pump 1, the oil cylinder is kept in an extending state, the input of the proportional overflow valve 6 is 0, the back pressure basically close to zero is kept, and the constant delivery pump is in a standby state at the moment, so that the energy-saving effect is better compared with that of the conventional constant-pressure variable pump in the standby state.
When the valve needs to be closed, the upper computer gives a signal, the two-position four-way electromagnetic reversing valve 7004 loses power, the electromagnetic reversing valve returns to the left station, similar to the above description, pressure oil at the outlet of the pump enters a rod cavity of the oil cylinder, hydraulic oil in a rodless cavity of the oil cylinder flows from an A port to a T port and returns through the proportional overflow valve 6, and due to the difference of the area ratio of the two cavities, the programmable controller 4 controls the rotating speed of the servo motor 2 to increase to a smaller set value V according to the programmed setting and the slope3The pressure at the outlet of the pump is adaptive to the change of the load, the telescopic end of the hydraulic equipment retracts, and the valve is closed; when the valve is close to the completely closed state, the programmable controller 4 controls the rotating speed of the servo motor 2 to be reduced to a preset value V according to a limit switch signal on the hydraulic equipment4And forming a fourth speed ramp.
The opening and closing processes of other types of valves are similar to those of valves opened by butterfly valves or ball valve oil cylinders, and the difference is that the rotating speed of the servo motor 2 is different from the set back pressure of the proportional overflow valve 6, such as a loaded gate valve, and the back pressure of the proportional overflow valve 6 is slightly higher than the loaded pressure formed by the self weight of a valve plate so as to control the speed of the valves when the valves are opened or closed.
When the hydraulic system of the hot blast stove has power failure and other accidents, the corresponding valve can still be closed by the emergency power source provided by the energy accumulator; at the moment, the top-mounted electromagnetic valve 8003 is de-energized, a fixed speed is set by the one-way throttle valve 8004 at the outlet of the accumulator oil supply pipe P when the valve is closed, and the proportional overflow valve 6 is powered by the UPS power supply and is kept in the highest back pressure state required by closing of the valve.
The utility model discloses not only can use at blast furnace hot blast stove, furnace roof hydraulic system, moreover, the utility model discloses a system that design principle moved alone at hydro-cylinder or the most executive component of motor of each process unit hydraulic control equipment of metallurgical industry can both use, and the aforesaid is used and all should be fallen within the protection scope the utility model discloses an.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (7)
1. The utility model provides an energy-saving blast furnace hot-blast stove hydraulic control system which characterized in that: the hydraulic control system comprises a control module, at least one hydraulic device, an oil supply loop and an oil return loop, wherein the oil supply loop and the oil return loop are connected to the hydraulic device;
the hydraulic equipment is connected with an electromagnetic directional valve;
the oil supply loop is sequentially provided with a hydraulic oil source device and a pressure sensor, and the oil return loop is provided with a proportional overflow valve;
the hydraulic oil source device comprises a fixed displacement pump and a servo motor for providing power for the fixed displacement pump;
and the proportional overflow valve, the electromagnetic directional valve and the servo motor are all electrically connected with and controlled by the control module.
2. The hydraulic control system of the energy-saving blast furnace hot blast stove according to claim 1, characterized in that: the emergency energy accumulator further comprises an emergency energy accumulator assembly, a pressure oil port of the emergency energy accumulator assembly is connected to an oil outlet of the constant delivery pump, and an oil return port of the emergency energy accumulator assembly is connected to a main oil return loop or a direct oil return tank of the system.
3. The hydraulic control system of the energy-saving blast furnace hot blast stove according to claim 1, characterized in that: the control module comprises a servo motor driver and a programmable controller, the servo motor driver is electrically connected with the servo motor, and the proportional overflow valve, the electromagnetic directional valve and the servo motor driver are all electrically connected with the programmable controller.
4. The hydraulic control system of the energy-saving blast furnace hot blast stove according to claim 1, characterized in that: the hydraulic equipment is any one of a butterfly valve oil cylinder, a ball valve oil cylinder and a gate valve oil cylinder, and the electromagnetic directional valve is a two-position four-way electromagnetic directional valve.
5. The hydraulic control system of the energy-saving blast furnace hot blast stove according to claim 1, characterized in that: the hydraulic equipment is an oil cylinder with a counterweight gate valve or an oil cylinder with a load gate valve.
6. The hydraulic control system of the energy-saving blast furnace hot blast stove according to claim 1, characterized in that: the hydraulic devices are at least two, the hydraulic devices are connected in parallel, and the hydraulic devices act sequentially according to a preset sequence.
7. The hydraulic control system of the energy-saving blast furnace hot blast stove according to claim 1, characterized in that: the control module is connected with a temperature sensor for measuring the ambient temperature, and the control module changes the rotating speed of the servo motor and the back pressure of the proportional overflow valve according to the change of the ambient temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921334857.1U CN210623280U (en) | 2019-08-16 | 2019-08-16 | Energy-saving blast furnace hot blast stove hydraulic control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921334857.1U CN210623280U (en) | 2019-08-16 | 2019-08-16 | Energy-saving blast furnace hot blast stove hydraulic control system |
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| CN210623280U true CN210623280U (en) | 2020-05-26 |
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| CN201921334857.1U Active CN210623280U (en) | 2019-08-16 | 2019-08-16 | Energy-saving blast furnace hot blast stove hydraulic control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332180A (en) * | 2019-08-16 | 2019-10-15 | 中冶赛迪工程技术股份有限公司 | A kind of energy-saving type blast furnace hot-blast stove hydraulic control system and method |
| CN113339490A (en) * | 2021-06-29 | 2021-09-03 | 马鞍山钢铁股份有限公司 | System for automatically adjusting nitrogen consumption of furnace top gear box |
-
2019
- 2019-08-16 CN CN201921334857.1U patent/CN210623280U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332180A (en) * | 2019-08-16 | 2019-10-15 | 中冶赛迪工程技术股份有限公司 | A kind of energy-saving type blast furnace hot-blast stove hydraulic control system and method |
| CN113339490A (en) * | 2021-06-29 | 2021-09-03 | 马鞍山钢铁股份有限公司 | System for automatically adjusting nitrogen consumption of furnace top gear box |
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