CN211039258U - Hydraulic driving energy-saving system of plate strip stepping heating furnace - Google Patents
Hydraulic driving energy-saving system of plate strip stepping heating furnace Download PDFInfo
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- CN211039258U CN211039258U CN201920961927.XU CN201920961927U CN211039258U CN 211039258 U CN211039258 U CN 211039258U CN 201920961927 U CN201920961927 U CN 201920961927U CN 211039258 U CN211039258 U CN 211039258U
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Abstract
The utility model discloses a hydraulic drive energy-saving system of a plate strip stepping heating furnace, which comprises a stepping mechanical lifting hydraulic cylinder system, a furnace door lifting hydraulic cylinder system, a hydraulic pump station, an oil supplementing pump station and an electric control system; the stepping mechanical lifting hydraulic cylinder system comprises a stepping mechanical hydraulic cylinder, a high-pressure accumulator group I, a medium-pressure accumulator group, a low-pressure accumulator group, a control valve group I, a control valve group II and a valve group I, and the furnace door lifting hydraulic cylinder system comprises a furnace door hydraulic cylinder, a high-pressure accumulator group II, a control valve group III, a control valve group IV and a valve group II. The utility model discloses a step-by-step machinery pneumatic cylinder, furnace gate pneumatic cylinder and leather bag formula energy storage ware group and electrical system carry out automatically regulated according to the required power of equipment, and system peak flow is little, and installed power is low, adapts to flow variation and power demand, realizes the optimum of system's energy demand to furthest's realization slab band heating furnace step-by-step machinery and the required energy consumption of furnace gate operation, and have intellectuality, self-adaptation, the automatic characteristics that match of power.
Description
Technical Field
The utility model relates to a slab band step-by-step heating furnace hydraulic drive economizer system technical field, specificly relate to a slab band step-by-step heating furnace hydraulic drive economizer system.
Background
Recently, most of domestic heating furnaces for plate and strip hot rolling are stepping heating furnaces, along with the increasing shortage of planned sites in factories, the size of a furnace body is gradually increased, the load is continuously improved, so that the requirements of large-scale and intensive industrial production are met, and main equipment stepping machinery and a furnace door are driven by hydraulic cylinders so as to meet the requirements of planar arrangement of a process plane and high driving power.
The operation of the stepping heating furnace stepping machine and the opening of the furnace door are intermittent working modes, the stepping machine conveys steel billets from a charging end to a discharging end, and the furnace door is opened and closed according to steel charging and steel discharging instructions of the heating furnace, so that the actions of the stepping machine and the furnace door are in a period of continuous change of operation and stop, the basic function of the stepping machine is to lift and put down the steel billets in the furnace, the furnace door is lifted and lowered to realize opening and closing, the furnace door is usually driven and controlled by a hydraulic cylinder, the loads to be overcome mainly comprise the dead weight of the stepping machine and the weight of the steel billets, and the loads to be overcome for opening and closing the furnace door almost are the.
From the above description, it can be seen that the stepping mechanism and the oven door operate intermittently, and the load and the self-weight are mainly overcome in the operation, and the operation is self-periodic. According to the traditional hydraulic station, the number of main pumps and the power of a motor need to be configured according to the maximum speed and the maximum load requirement of the movement of a stepping machine, so that the installed power of the hydraulic station is large, the starting power is large, the motor drives the hydraulic main pump to continuously operate and to operate in a standby mode, the configuration only can meet the simple action requirement of the stepping machine and a furnace door, the matching requirement of the periodic change of the load on the input power in the lifting working process of the stepping machine and the furnace door cannot be met, the starting power cannot be adjusted by tracking the load change of the stepping machine, therefore, the equipment is high in energy consumption, large in heat productivity, high in maintenance and operation cost, and the. In order to solve the problems of high energy consumption and uneconomic operation of the conventional plate strip heating furnace stepping machine and furnace door, the design of a plate strip stepping heating furnace hydraulic drive energy-saving system becomes a very realistic work.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved
An object of the utility model is to provide a slab band walking beam heating furnace hydraulic drive economizer system to solve the problem that proposes among the above-mentioned background art.
2. Technical scheme
In order to solve the above problem, the utility model adopts the following technical scheme:
a hydraulic drive energy-saving system of a plate-strip stepping heating furnace comprises a stepping mechanical lifting hydraulic cylinder system, a furnace door lifting hydraulic cylinder system, a hydraulic pump station, an oil supplementing pump station and an electric control system.
The stepping mechanical lifting hydraulic cylinder system comprises a stepping mechanical hydraulic cylinder, a first high-pressure accumulator group, a first intermediate-pressure accumulator group, a second low-pressure accumulator group, a first control valve group, a second control valve group and a first accumulator group, wherein an oil port A and an oil port C of the stepping mechanical hydraulic cylinder are connected with the first control valve group for controlling the hydraulic oil flow and pressure at the oil port A and the oil port C of the stepping mechanical hydraulic cylinder through oil paths, an oil port B of the stepping mechanical hydraulic cylinder is connected with the second control valve group for controlling the hydraulic oil flow and pressure at the oil port B of the stepping mechanical hydraulic cylinder through oil paths, the first high-pressure accumulator group, the second intermediate-pressure accumulator group and the second low-pressure accumulator group are connected with the second control valve group through oil paths, and oil paths between the first high-pressure accumulator group, the second intermediate-pressure accumulator group, the second low-pressure, The energy accumulator valve group I is used for hydraulic oil flow and pressure of the medium-pressure energy accumulator group and the low-pressure energy accumulator group;
the furnace door lifting hydraulic cylinder system comprises a furnace door hydraulic cylinder, a high-pressure energy accumulator group II, a control valve group III, a control valve group IV and an energy accumulator valve group I, wherein an oil port A of the furnace door hydraulic cylinder is connected with the atmosphere, an oil port B of the furnace door hydraulic cylinder is connected with a control valve group III used for controlling the flow and pressure of hydraulic oil at the oil port B of the furnace door hydraulic cylinder through an oil way, the high-pressure energy accumulator group II is connected with the control valve group III through an oil way, a valve group II used for controlling the flow and pressure of the hydraulic oil of the high-pressure energy accumulator group is arranged on the oil way between the high-pressure energy accumulator group II and the control valve group III, and an oil port C of the furnace door hydraulic cylinder is connected;
the hydraulic pump station is respectively connected with the first control valve group and the fourth control valve group through oil passages, and the oil supplementing pump station is respectively connected with the second control valve group and the third control valve group through oil passages.
The electric control system comprises a controller, a detection element and a control valve group, and is used for automatically controlling the work of the energy accumulator group and the work of the hydraulic pump station, automatically matching the opening of the high-pressure energy accumulator group I, the medium-pressure energy accumulator group, the low-pressure energy accumulator group and the hydraulic pump station, or opening the low-pressure energy accumulator group, the medium-pressure energy accumulator group and the high-pressure energy accumulator group one by one, or opening part or opening all of the low-pressure energy accumulator group; and the running speed of the furnace door hydraulic cylinder load is automatically tracked and recognized, and the high-pressure energy accumulator group II and the hydraulic pump station are indicated to work cooperatively, so that the hydraulic pump station is started.
Preferably, detecting element is including setting up at the pressure sensor of step-by-step mechanical hydraulic cylinder output, setting up at the displacement sensor of furnace gate pneumatic cylinder output and setting up the pressure relay that returns the oil pipe way at the furnace gate pneumatic cylinder, displacement sensor and pressure relay are used for discerning the functioning speed of furnace gate pneumatic cylinder load, the inside of valve unit is provided with respectively and is used for controlling two and the hydraulic power unit collaborative work of high-pressure energy storage group, and the electromagnetic directional valve A of opening of hydraulic power unit with be used for controlling opening of high-pressure energy storage group one, medium-pressure energy storage group, low-pressure energy storage group and hydraulic power unit, or open low, medium, high-pressure energy storage group one by one, perhaps open the part, perhaps open whole electromagnetic directional valve.
Preferably, the control valve group I, the control valve group II, the control valve group III, the control valve group IV, the energy accumulator valve group I, the energy accumulator valve group II, the oil supplementing pump station and the hydraulic oil station are controlled to be opened and closed by a controller in an electric control system.
Preferably, step-by-step mechanical pneumatic cylinder and furnace gate pneumatic cylinder all include cylinder body, guide post, sliding cylinder and annular piston the inside hydraulic pressure chamber that is provided with of cylinder body, the central point department of putting of the inside central point of hydraulic pressure chamber is provided with the guide post, and runs through on the inside length direction of guide post and have the oil feed passageway, the sliding cylinder that is provided with in the guide post outside, the sliding cylinder bottom outside of the inside of hydraulic pressure chamber is provided with annular piston, the cylinder body lateral wall of annular piston one side is provided with hydraulic fluid port B, the cylinder body lateral wall of annular piston opposite side is provided with hydraulic fluid port A, the cylinder body one end of oil feed passageway one end is provided with hydraulic.
Preferably, two guide wheels are arranged above the furnace door in parallel, a steel wire rope is arranged at the top of the furnace door, and one end, far away from the furnace door, of the steel wire rope extends through the two guide wheels to be connected with the output end of a hydraulic cylinder of the furnace door.
Preferably, the accumulator group is a bladder type accumulator group.
3. Advantageous effects
The utility model discloses a required power of step machine pneumatic cylinder, furnace gate pneumatic cylinder and leather bag formula accumulator group and electrical system automatic tracking in-process equipment carries out automatically regulated, and system peak flow is little, and installed power is low, and self-adaptation flow variation and power demand realize the optimum of system energy demand to furthest's realization slab band heating furnace step machine and the required energy consumption of furnace gate operation, and the utility model discloses power automatic matching, the minimum promptly power consumption of external world delivery reduces by a wide margin, even only has 1/3 of former dress power or 1/4; the device has the characteristics of compact structure, convenience in manufacturing and installation, easiness in maintenance, overhaul and the like; the consumption of spare parts, filter elements, working medium hydraulic oil and other consumable materials is low; the device has low heat productivity, even no heat; the vibration impact of the pipeline is small, and even the pipeline vibration is eliminated; daily spot inspection and maintenance work is reduced; the equipment runs stably and has low noise; low manufacturing cost and good economical efficiency.
Drawings
FIG. 1 is a diagram of the overall control system of the present invention;
FIG. 2 is a schematic view of a stepping mechanical hydraulic cylinder system of the present invention;
FIG. 3 is a schematic view of the furnace door lifting hydraulic cylinder system of the present invention;
fig. 4 is a schematic structural view of the furnace door hydraulic cylinder and the stepping mechanical hydraulic cylinder of the present invention.
Reference numerals: 1-control valve group I, 2-stepping mechanical hydraulic cylinder, 3-control valve group II, 4-energy accumulator valve group I, 5-low-pressure energy accumulator group, 6-medium-pressure energy accumulator group, 7-high-pressure energy accumulator group I, 8-furnace door, 9-control valve group IV, 10-guide wheel, 11-high-pressure energy accumulator group II, 12-energy accumulator valve group II, 13-control valve group III, 14-furnace door hydraulic cylinder, 15-oil port B, 16-annular piston, 17-oil inlet channel, 18-sliding cylinder, 19-oil port A, 20-hydraulic cavity, 21-cylinder body, 22-guide column and 23-oil port C.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
The type of the pressure sensor used in the example is skf-23797, the type of the displacement sensor is MTS 1130MP05S1G310, the type of the pressure relay is HYDAC EDS8446-2-0400-000, the type of the electromagnetic directional valve A and the type of the electromagnetic directional valve B are both Ward 4WE10J31B/CG24N9Z 5L, and the type of the controller is Siemens P L C;
a hydraulic drive energy-saving system for a plate strip stepping heating furnace as shown in fig. 1 comprises a stepping mechanical lifting hydraulic cylinder system, a furnace door lifting hydraulic cylinder system, a hydraulic pump station, an oil supplementing pump station and an electric control system.
The stepping mechanical lifting hydraulic cylinder system comprises a stepping mechanical hydraulic cylinder 2, a first high-pressure accumulator group 7, a medium-pressure accumulator group 6, a low-pressure accumulator group 5, a first control valve group 1, a second control valve group 3 and a first accumulator valve group 4, wherein an oil port A19 and an oil port C23 of the stepping mechanical hydraulic cylinder 2 are connected with the first control valve group 1 for controlling the flow and pressure of hydraulic oil at an oil port A19 and an oil port C23 of the stepping mechanical hydraulic cylinder 2 through oil passages, an oil port B15 of the stepping mechanical hydraulic cylinder 2 is connected with the second control valve group 3 for controlling the flow and pressure of the hydraulic oil at an oil port B15 of the stepping mechanical hydraulic cylinder 2 through oil passages, the first high-pressure accumulator group 7, the medium-pressure accumulator group 6 and the low-pressure accumulator group 5 are connected with the second control valve group 3 through oil passages, and oil passages among the first high-pressure accumulator group 7, the medium-pressure accumulator group 6, the, The energy accumulator valve group I4 of the hydraulic oil flow and pressure of the medium-pressure energy accumulator group 6 and the low-pressure energy accumulator group 5 is a leather bag type energy accumulator group;
the furnace door lifting hydraulic cylinder system comprises a furnace door hydraulic cylinder 14, a high-pressure energy accumulator group II 11, a control valve group III 13, a control valve group IV 9 and an energy accumulator valve group II 12, wherein an oil port A19 of the furnace door hydraulic cylinder 14 is connected with the atmosphere, an oil port B15 of the furnace door hydraulic cylinder 14 is connected with the control valve group III 13 used for controlling the flow and the pressure of hydraulic oil at an oil port B15 of the furnace door hydraulic cylinder 14 through an oil way, the high-pressure energy accumulator group II 11 is connected with the control valve group III 13 through an oil way, the oil way between the high-pressure energy accumulator group II 11 and the control valve group III 13 is provided with the valve group II 12 used for controlling the flow and the pressure of the hydraulic oil of the high-pressure energy accumulator group II 11, an oil port C23 of the furnace door hydraulic cylinder 14 is connected with the control valve group IV 9 used for controlling the flow and the, one end, far away from the furnace door 8, of the steel wire rope extends through the two guide wheels 10 to be connected with the output end of the furnace door hydraulic cylinder, each of the stepping mechanical hydraulic cylinder 2 and the furnace door hydraulic cylinder 14 comprises a cylinder body 21, a guide post 22, a sliding cylinder 18 and an annular piston 16, a hydraulic cavity 20 is arranged inside the cylinder body 21, the guide post 22 is arranged at the central position inside the hydraulic cavity 20, an oil inlet channel 17 penetrates through the length direction inside the guide post 22, the sliding cylinder 18 is arranged outside the guide post 22 in a sliding manner, the annular piston 16 is arranged outside the bottom end of the sliding cylinder 18 inside the hydraulic cavity 20, an oil port B15 is arranged on the side wall of the cylinder body 21 on one side of the annular piston 16, an oil port A19 is arranged on the side wall of the cylinder body 21 on the other;
the hydraulic pump station is respectively connected with the first control valve group 1 and the fourth control valve group 9 through oil ways, the oil supplementing pump station is respectively connected with the second control valve group 3 and the third control valve group 13 through oil ways, and the first control valve group 1, the second control valve group 3, the third control valve group 13, the fourth control valve group 9, the first energy accumulator valve group 4, the second energy accumulator valve group 12, the oil supplementing pump station and the hydraulic oil station are electrically connected with the electric control system.
The electric control system comprises a controller, a detection element and a control valve group, wherein the detection element comprises a pressure sensor arranged at the output end of the stepping mechanical hydraulic cylinder 2, a displacement sensor arranged at the output end of the furnace door hydraulic cylinder 14 and a pressure relay arranged on an oil return pipeline of the furnace door hydraulic cylinder 14, the pressure relay is an element which enables an electric contact to act when the fluid pressure reaches a preset value in a hydraulic system, the pressure relay can also be defined as a hydraulic component which converts the pressure into an electric signal, a client can output the electric signal when the certain set pressure is realized by adjusting the pressure relay according to the pressure design requirement of the client, the displacement sensor and the pressure relay are used for identifying the running speed of the load of the furnace door hydraulic cylinder 14, the control valve group is internally provided with a second high-pressure energy accumulator group 11 and a hydraulic pump station to work, the electromagnetic reversing valve A is used for controlling the opening of the high-pressure accumulator group I7, the medium-pressure accumulator group 6, the low-pressure accumulator group 5 and the hydraulic pump station, or the low-pressure accumulator group, the medium-pressure accumulator group and the high-pressure accumulator group are opened one by one, or part of the low-pressure accumulator group, the medium-pressure accumulator group and the high-pressure accumulator group are opened, or all the electromagnetic reversing valves B are opened.
Working principle; 1. the working principle of the stepping mechanical lifting hydraulic cylinder system is as follows: a piston rod of a hydraulic cylinder 2 of the stepping machine is ejected out, the stepping machine is lifted together with the load, the gravity of the equipment and the load and the friction of a system are overcome, the load is the self weight firstly, then the self weight adds the weight of the steel billet in the furnace, and the maximum load is realized at the moment; the piston rod of the hydraulic cylinder 2 of the stepping machine retreats, the stepping machine falls with the load, the frictional resistance of the system is overcome, firstly, the load is the weight of the steel billet in the dead weight furnace, at the moment, the maximum load is the load, then, the dead weight is the load, and the load is changed in the process, as shown in the attached drawing 2, the oil is fed from an oil port B15 and an oil port C23 of the hydraulic cylinder 2 of the stepping machine, and the oil is fed from an oil port A19, so that the piston rod;
in the process, a pressure sensor of a detection element of an electric control system is used for identifying the load change of the stepping mechanical hydraulic cylinder 2 and transmitting a signal to a controller, the controller controls the opening of a high-medium low-pressure accumulator group and a hydraulic pump station by using an electromagnetic directional valve B of a control valve group, or opens a high-medium low-pressure accumulator group 7, a medium-pressure accumulator group 6 and a low-pressure accumulator group 5 one by one, or opens a part or opens all of them, when a pressure relay of the electric control system identifies that the flow or the pressure provided by the accumulator groups is insufficient, an oil port C23 is changed from an oil supplementing state to a working state, pressure and flow are started to be established, the high-medium-pressure accumulator group 7, the medium-pressure accumulator group 6 and the low-pressure accumulator group 5 work in cooperation, a piston rod is driven to eject according to a specified speed curve, the ascending process is completed, the oil port B15 is used for charging oil and storing energy for the energy accumulator group, the oil port C23 is used for returning oil, the piston rod of the stepping mechanical lifting cylinder is retracted, the equipment and the load are lowered and reset to complete an action cycle, the equipment and the load are lowered under the action of gravity in the lowering process, the gravity potential energy applies work to the energy accumulator group through the oil port B15, the energy accumulator group absorbs the gravity potential energy of the equipment and the load, the load is changed in the process, a pressure sensor of a detection element of an electric control system is used for identifying the change of the load of the stepping mechanical hydraulic cylinder and transmitting a signal to a controller, the controller controls the work of the energy accumulator group and the work of a hydraulic pump station through an electromagnetic reversing valve of a control valve group B, the high-pressure energy accumulator group I7, the medium-pressure energy accumulator group 6, the low-pressure energy accumulator group 5 and, The electric control system converts the gravitational potential energy of the equipment into the pressure energy of the energy accumulator group according to a hydraulic cylinder descending curve calibrated by the system, the oil port C23 only acts as oil return in the descending process, the working state of the oil port A19 under the command of the electric control system can be a pure oil supplementing state or a pressure and flow establishing state, the energy storage pressure requirement of each energy accumulator group is met under the condition that the descending speed curve of the stepping mechanical hydraulic cylinder 2 is ensured, and the gravitational potential energy of the equipment and the load is completely converted into the pressure potential energy of the energy accumulator group in the process.
The working principle of the furnace door lifting hydraulic cylinder 14 can be seen from the attached figure 3 that the load driven by the furnace door hydraulic cylinder 14 is a furnace door 8, an oil port B15 is connected with a second energy accumulator group 11, an oil port A19 is communicated with the atmosphere, an oil port C17 is connected with a hydraulic pump station, when the furnace door 8 is opened, a piston rod of the furnace door hydraulic cylinder 14 retracts to lift the furnace door 8, and the gravity of the furnace door 8 and the system friction are overcome; a piston rod of the furnace door hydraulic cylinder 14 is ejected out, the furnace door 8 falls and is closed, the frictional resistance of the system is overcome, when the furnace door 8 in the attached drawing 3 is opened, oil enters from an oil port B15 and an oil port C23 of the furnace door hydraulic cylinder 14, the piston rod can be pushed to retract, the furnace door 8 is lifted, the load is almost constant in the process, a displacement sensor and a pressure relay are used for identifying the running speed of the load of the furnace door hydraulic cylinder 14 and transmitting signals to a controller, the controller utilizes an electromagnetic reversing valve A of a control valve group to indicate that the second energy accumulator group 11 and a hydraulic pump station work in a coordinated mode, the hydraulic pump station is opened, the oil port C23 establishes pressure and flow, the second high-pressure energy accumulator group 11 releases pressure potential energy, the furnace door 8 is lifted at a preset speed under the command of an electric control system, when the furnace door 8 is closed, the piston rod of the, the oil port C23 establishes pressure and flow requirements, the furnace door descends and is closed, and in the process, the gravitational potential energy of the furnace door 8 is converted into the pressure potential energy of the second high-pressure energy accumulator group 11 under the command and coordination of the electric control system to be used in the next action cycle.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (6)
1. A hydraulic drive energy-saving system of a plate strip stepping heating furnace is characterized by comprising a stepping mechanical lifting hydraulic cylinder system, a furnace door lifting hydraulic cylinder system, a hydraulic pump station, an oil supplementing pump station and an electric control system;
the stepping mechanical lifting hydraulic cylinder system comprises a stepping mechanical hydraulic cylinder (2), a high-pressure accumulator group I (7), a medium-pressure accumulator group (6), a low-pressure accumulator group (5), a control valve group I (1), a control valve group II (3) and an accumulator valve group I (4), wherein an oil port A (19) and an oil port C (23) of the stepping mechanical hydraulic cylinder (2) are connected with the control valve group I (1) for controlling the hydraulic oil flow and pressure at the oil port A (19) and the oil port C (23) of the stepping mechanical hydraulic cylinder (2) through oil ways, an oil port B (15) of the stepping mechanical hydraulic cylinder (2) is connected with the control valve group II (3) for controlling the hydraulic oil flow and pressure at the oil port B (15) of the stepping mechanical hydraulic cylinder (2) through oil ways, and the high-pressure accumulator group I (7), the medium-pressure accumulator group (6) and the low-pressure accumulator group (5) are connected with the control valve, oil paths among the high-pressure accumulator group I (7), the medium-pressure accumulator group (6), the low-pressure accumulator group (5) and the control valve group II (3) are all provided with an accumulator valve group I (4) used for controlling the flow and pressure of hydraulic oil of the high-pressure accumulator group I (7), the medium-pressure accumulator group (6) and the low-pressure accumulator group (5);
the furnace door lifting hydraulic cylinder system comprises a furnace door hydraulic cylinder (14), a high-pressure accumulator group II (11), a control valve group III (13), a control valve group IV (9) and an accumulator valve group II (12), an oil port A (19) of the furnace door hydraulic cylinder (14) is connected with the atmosphere, an oil port B (15) of the furnace door hydraulic cylinder (14) is connected with the control valve group III (13) used for controlling the hydraulic oil flow and the pressure at the oil port B (15) of the furnace door hydraulic cylinder (14) through an oil way, the high-pressure accumulator group II (11) is connected with the control valve group III (13) through an oil way, a valve group II (12) used for controlling the hydraulic oil flow and the pressure of the high-pressure accumulator group II (11) is arranged on the oil way between the high-pressure accumulator group II (11) and the control valve group III (13), and an oil port C (23) of the furnace door hydraulic cylinder (14) is connected with the control valve group IV (9) used for controlling (ii) a
The hydraulic pump station is respectively connected with the first control valve group (1) and the fourth control valve group (9) through oil passages, and the oil supplementing pump station is respectively connected with the second control valve group (3) and the third control valve group (13) through oil passages;
the electric control system comprises a controller, a detection element and a control valve group, and controls the opening of the high-pressure energy accumulator group I (7), the medium-pressure energy accumulator group (6), the low-pressure energy accumulator group (5) and the hydraulic pump station, or opens the low-pressure energy accumulator group, the medium-pressure energy accumulator group and the high-pressure energy accumulator group one by one, or opens part of the high-pressure energy accumulator group, or opens all the high-pressure energy accumulator groups; and the running speed of the load of the hydraulic cylinder (14) of the furnace door is automatically tracked and recognized, and the high-pressure accumulator group II (11) and the hydraulic pump station are indicated to work cooperatively, so that the hydraulic pump station is started.
2. The hydraulic drive energy-saving system of the plate-strip stepping heating furnace according to claim 1, wherein the detection element comprises a pressure sensor arranged at the output end of the stepping mechanical hydraulic cylinder (2), a displacement sensor arranged at the output end of the furnace door hydraulic cylinder (14) and a pressure relay arranged on an oil return pipeline of the furnace door hydraulic cylinder (14), the displacement sensor and the pressure relay are used for identifying the running speed of the load of the furnace door hydraulic cylinder (14), the control valve group is internally provided with a second high-pressure energy accumulator group (11) and a hydraulic pump station respectively for cooperative work, an electromagnetic directional valve A for opening the hydraulic pump station and a first high-pressure energy accumulator group (7), a medium-pressure energy accumulator group (6), a low-pressure energy accumulator group (5) and the hydraulic pump station are controlled to be opened, or the low, medium and high-pressure energy accumulator groups are opened one by one, or, or all the electromagnetic directional valves B are opened.
3. The hydraulic drive energy-saving system of the plate strip stepping heating furnace according to claim 2, wherein the first control valve bank (1), the second control valve bank (3), the third control valve bank (13), the fourth control valve bank (9), the first energy accumulator valve bank (4), the second energy accumulator valve bank (12), the oil supplementing pump station and the hydraulic oil station are controlled to be opened and closed by a controller in an electric control system.
4. The hydraulic drive energy-saving system of the plate strip stepping heating furnace according to claim 1, wherein the stepping mechanical hydraulic cylinder (2) and the furnace door hydraulic cylinder (14) both comprise a cylinder body (21), a guide post (22), a sliding cylinder (18) and an annular piston (16), a hydraulic cavity (20) is arranged inside the cylinder body (21), the guide post (22) is arranged at the center inside the hydraulic cavity (20), an oil inlet channel (17) penetrates through the guide post (22) in the length direction, the sliding cylinder (18) is arranged outside the guide post (22) in a sliding manner, the annular piston (16) is arranged outside the bottom end of the sliding cylinder (18) inside the hydraulic cavity (20), an oil port B (15) is arranged on the side wall of the cylinder body (21) on one side of the annular piston (16), and an oil port A (19) is arranged on the side wall of the cylinder body (21) on the other side of the annular piston (16), an oil port C (23) is arranged at one end of the cylinder body (21) at one end of the oil inlet channel (17).
5. The hydraulic drive energy-saving system of the plate strip stepping heating furnace according to claim 1, wherein two guide wheels (10) are arranged above the furnace door (8) in parallel, a steel wire rope is arranged on the top of the furnace door (8), and one end of the steel wire rope, which is far away from the furnace door (8), extends through the two guide wheels (10) and is connected with the output end of a furnace door hydraulic cylinder.
6. The hydraulic drive energy-saving system of the plate strip stepping heating furnace according to claim 1, wherein the accumulator group is a bladder type accumulator group.
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| CN201920961927.XU CN211039258U (en) | 2019-06-25 | 2019-06-25 | Hydraulic driving energy-saving system of plate strip stepping heating furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128173A (en) * | 2019-06-25 | 2020-12-25 | 辽宁宇航工业技术有限公司 | Hydraulic driving energy-saving system of plate strip stepping heating furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128173A (en) * | 2019-06-25 | 2020-12-25 | 辽宁宇航工业技术有限公司 | Hydraulic driving energy-saving system of plate strip stepping heating furnace |
| CN112128173B (en) * | 2019-06-25 | 2024-04-23 | 辽宁宇航工业技术有限公司 | Hydraulic drive energy-saving system of plate and strip stepping heating furnace |
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