CN115839364A - Potential energy recovery device of hydraulic system of stepping heating furnace - Google Patents
Potential energy recovery device of hydraulic system of stepping heating furnace Download PDFInfo
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- CN115839364A CN115839364A CN202211698084.1A CN202211698084A CN115839364A CN 115839364 A CN115839364 A CN 115839364A CN 202211698084 A CN202211698084 A CN 202211698084A CN 115839364 A CN115839364 A CN 115839364A
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Abstract
The invention discloses a potential energy recovery device of a hydraulic system of a stepping heating furnace, which comprises a lifting oil cylinder, a speed control loop and a potential energy recovery device, wherein oil ports of cavities at two ends of the lifting oil cylinder are respectively connected with the speed control loop, the potential energy recovery device is connected on a rodless cavity loop of the lifting oil cylinder in parallel, and a main connecting pipeline between the potential energy recovery device and the speed control loop is provided with a switch regulating valve group and a flow sensor. The device has simple structure, and maintenance, transformation cost low grade characteristics can guarantee to reduce online working pump quantity after, maintain walking beam lift motion characteristic curve unchangeable, are responsible for filling the flow breach by potential energy recovery unit to reduce the energy consumption.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a potential energy recovery device of a hydraulic system of a walking beam furnace.
Background
The heating furnace is an indispensable ring on the whole steel rolling production line, and the walking beam furnace has gradually replaced the original push beam furnace, roller hearth furnace and the like due to the unique superiority. The walking beam furnace generally has large load and frequent action. Therefore, the hydraulic transmission is widely applied to the stepping heating furnace due to the characteristics of small volume, large load, easy realization of electromechanical integrated control and the like, and the uniform-speed advance of the billet is realized through the circular motion according to the established program of ascending, advancing, descending and retreating.
At present, the domestic walking beam furnace has the tendency of large-scale and fast pace. The hydraulic system of the conventional stepping heating furnace mainly adopts a design mode of a constant-pressure variable pump and a proportional control valve, a rod and wire heating furnace usually adopts a speed control loop of a proportional reversing valve because of small maximum flow of the system, and a slab heating furnace usually adopts a speed control loop of a proportional throttle valve because of large system load and large maximum flow of the system. The two designs cannot effectively utilize the gravitational potential energy generated when the heavy furnace bottom machinery descends, and the partial potential energy is also converted into heat energy, so that the temperature of hydraulic oil is increased, and the energy consumption of a circulating cooling system is increased.
Therefore, how to recycle the huge gravitational potential energy generated when the mechanical steel support at the furnace bottom descends determines the energy-saving index of the whole system, and is also the key of the energy saving of the whole system.
Through investigation, an energy-saving system capable of recycling Liang Shi by stepping Liang Shi by using a special two-stage hydraulic cylinder is commonly used on a production line of a wire and bar heating furnace at present, wherein a first-stage hydraulic cylinder is respectively connected with a high-low pressure accumulator group and is respectively responsible for recycling the gravitational potential energy of stepping Liang Fuzai descending and no-load descending and releasing the gravitational potential energy in a grading manner in the next stepping beam ascending. The potential energy recovery device can effectively recover part of gravitational potential energy when the walking beam descends, and reduces the number of working pumps of the system, but the recovery of the potential energy needs to be based on a specially-made bipolar hydraulic cylinder, the structure of the device is complex, and the overhaul and maintenance cost is high. The potential energy recovery device utilizes the matching of the driving cylinder and the driven cylinder with the pump source proportional pressure regulating valve and the energy accumulator group, and the device is very complex in equipment structure and control logic due to the addition of the two oil cylinders, cannot effectively reduce the number of working pumps and is limited in energy-saving effect.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the potential energy recovery device of the hydraulic system of the walking beam furnace, aiming at the defects in the prior art, the potential energy recovery device is simple in structure and low in maintenance and modification cost, can ensure that the lifting and falling motion characteristic curve of the walking beam is unchanged after the number of online working pumps is reduced, and is responsible for filling a flow gap by the potential energy recovery device, so that the energy consumption is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the potential energy recovery device of the hydraulic system of the stepping heating furnace comprises a lifting oil cylinder, a speed control loop and a potential energy recovery device, oil ports of cavities at two ends of the lifting oil cylinder are respectively connected with the speed control loop, the potential energy recovery device is connected in parallel on a rodless cavity loop of the lifting oil cylinder, a switch regulating valve group and a flow sensor are arranged on a main connecting pipeline between the potential energy recovery device and the speed control loop, and the switch regulating valve group consists of a plurality of two-way cartridge valves.
According to the technical scheme, the potential energy recovery device comprises two independent energy accumulator groups, namely a primary booster energy accumulator group and a secondary booster energy accumulator group, the switch regulating and controlling valve group comprises two groups of directional control valve groups, one group of directional control valve groups is positioned between a rodless cavity of the oil cylinder and the energy accumulator groups as well as between the oil cylinder and the speed control loop and is used for controlling hydraulic energy converted from gravitational potential energy when the recovery walking beam descends and is also used for controlling switching work between the energy-saving loop and the speed control loop, and the other group of directional control valve groups is positioned between the energy accumulator groups and an oil inlet pipe of the speed control loop and is used for participating in the release process of energy control.
According to the technical scheme, the supercharging energy accumulator group comprises an energy storage hydraulic pipeline and a plurality of energy accumulators connected onto the hydraulic pipeline, one end of the energy storage hydraulic pipeline is connected with a rodless cavity of the lifting oil cylinder through a one-way valve through a direction control valve group, the one-way valve is used for ensuring that hydraulic energy flows in a single way, and the other end of the energy storage hydraulic pipeline is connected with an oil inlet pipe of the speed control loop through the direction control valve group.
According to the technical scheme, an electromagnetic overflow valve and an oil supplementing and draining loop are connected to a hydraulic pipeline; the electromagnetic overflow valve prevents the potential energy recovery device from being overloaded, and when the pressure of the accumulator group is too high, the system is unloaded.
According to the technical scheme, the oil supplementing and draining loop comprises a pressure sensor, a speed regulating valve, a hydraulic lock and an electromagnetic directional valve which are sequentially connected. The energy accumulator is connected with one end of the speed regulating valve through a hydraulic pipeline, the other end of the speed regulating valve is sequentially connected with the hydraulic lock and the electromagnetic directional valve, the action of the electromagnetic directional valve is controlled through signals fed back by the pressure sensor, pressure compensation or pressure relief is carried out on the energy accumulator group, and the pressure of the energy accumulator group is kept constant.
According to the technical scheme, the switch regulating and controlling valve group comprises four two-way directional control valves, namely a first two-way directional control valve, a second two-way directional control valve, a third two-way directional control valve and a fourth two-way directional control valve, and two groups of directional control valve groups are formed (namely the first two-way directional control valve and the second two-way directional control valve form one directional control valve group, the third two-way directional control valve and the fourth two-way directional control valve form the other directional control valve group), each two-way directional control valve is provided with a directional control cover plate, one end of the first two-way directional control valve is connected with a primary supercharged energy accumulator group and a secondary supercharged energy accumulator group, and the other end of the first two-way directional control valve is connected with a rodless cavity loop of the oil cylinder; one end of the second two-way direction control valve is connected with the speed control loop, and the other end of the second two-way direction control valve is connected with the oil cylinder rodless cavity loop; when the first two-way direction control valve is opened, the second two-way direction control valve must be closed, and vice versa; one end of a third two-way directional control valve is connected with the primary adding energy accumulator group, and the other end of the third two-way directional control valve is connected with an oil inlet pipe of the speed control loop; one end of a fourth two-way directional control valve is connected with the secondary booster accumulator group, and the other end of the fourth two-way directional control valve is connected with an oil inlet pipe of the speed control loop; when the third two-way directional control valve is open, the fourth two-way directional control valve must be closed, and vice versa.
According to the technical scheme, overflow valves are arranged at two ends of the second two-way direction control valve and are responsible for adjusting pressure fluctuation generated when the energy-saving loop and the speed control loop are switched.
According to the technical scheme, the speed control loop is provided with the check valve on the oil inlet pipe and used for preventing the hydraulic oil from flowing back.
According to the technical scheme, the lifting oil cylinder is provided with the displacement sensor.
According to the technical scheme, the speed control loop comprises a balance valve, a proportional reversing valve 1 and a pressure compensator which are connected in sequence.
The invention has the following beneficial effects:
the invention can effectively utilize the accumulator group to recover huge gravitational potential energy generated when the stepping Liang Fuzai descends and convert the huge gravitational potential energy into hydraulic energy by connecting the potential energy recovery device in parallel on the stepping beam lifting speed control loop, controls the opening and closing of the valve group through the cross control switch of the flow sensor and the displacement sensor, is utilized when the stepping beam ascends next time, fills the flow gap generated by reducing the number of the working pumps running on line, and maintains the stepping beam lifting speed characteristic curve unchanged; meanwhile, the potential energy recovery device and the speed control device are independent respectively, a user can directly add the potential energy recovery device on the general design, the energy-saving effect can be achieved without dismantling and rebuilding the whole system, and the potential energy recovery device has the characteristics of low maintenance and reconstruction cost, high applicability and the like.
Drawings
FIG. 1 is a schematic structural diagram of a potential energy recovery device of a hydraulic system of a walking beam furnace in an embodiment of the invention;
in the figure, 1-a proportional reversing valve, 2-a balance valve, 3-an energy accumulator group, 4-a lifting oil cylinder, 5-a displacement sensor, 7-a one-way valve, 10-an electromagnetic overflow valve, 11-an overflow valve, 13-an electromagnetic reversing valve, 14-a hydraulic lock, 15-a speed regulating valve, 16-a pressure compensator and 17-a flow sensor;
8.1-a first pressure sensor, 8.2-a second pressure sensor, 8.3-a third pressure sensor;
9.1-a first two-way directional control valve, 9.2-a second two-way directional control valve, 9.3-a third two-way directional control valve, and 9.4-a fourth two-way directional control valve;
12.1-a first high-pressure ball valve, 12.2-a second high-pressure ball valve, and 12.3-a third high-pressure ball valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1, the potential energy recovery device of a hydraulic system of a walking beam furnace in an embodiment provided by the present invention includes a lift cylinder 4, a speed control loop and a potential energy recovery device, oil ports of two end cavities of the lift cylinder 4 are respectively connected to the speed control loop, the potential energy recovery device is connected in parallel to a rodless cavity loop of the lift cylinder 4, a connection pipeline between the potential energy recovery device and the speed control loop is provided with a switch regulation valve set and a flow sensor 17, and the system flow sensor 17 and a displacement sensor 5 of the lift cylinder 4 jointly participate in controlling the opening and closing of the switch regulation valve set. One end of the potential energy recovery device is connected with the rodless cavity of the oil cylinder and is responsible for recovering gravitational potential energy generated when the walking beam descends, and the other end of the potential energy recovery device is connected with the oil inlet pipe of the speed control loop and is responsible for filling the flow gap.
Further, the potential energy recovery device comprises two parallel accumulator groups 3 which are respectively a primary booster accumulator group and a secondary booster accumulator group, the switch regulating and controlling valve group comprises two groups of directional control valve groups, one group of directional control valve groups is positioned between the rodless cavity of the oil cylinder and the accumulator groups and between the oil cylinder and the speed control loop and is used for controlling the hydraulic energy converted from the gravitational potential energy when the recovery walking beam descends and is also responsible for controlling the switching work between the energy-saving loop and the speed control loop, and the other group of directional control valve groups is positioned between the accumulator groups and the oil inlet pipe of the speed control loop and is responsible for participating in the release process of the control energy.
Furthermore, a main P pipe is a pressure oil inlet pipe, the general oil inlet pipe is P, an oil return pipe is T, and the oil pump is universal in industry.
The flow sensor 17 and the displacement sensor 5 of the lifting oil cylinder jointly participate in the regulation and control of the direction control valve group, when the flow sensor 17 detects that the flow of the system is close to the maximum value, the flow sensor 17 sends a signal to enable the energy accumulator group to release energy, and the ascending movement of the walking beam is accelerated; when the displacement sensor 5 of the lifting oil cylinder detects a steel position or a stop position of the stepping Liang Jiejin support, the displacement sensor 5 sends a signal to enable the energy accumulator group to stop releasing energy, the proportional valve is used for controlling the stepping beam to finally decelerate until the stepping beam stops, the flow sensor 17 and the displacement sensor 5 are respectively connected with controllers of the energy accumulator groups, and the controllers of the energy accumulator groups are connected with the switch regulating valve group and the proportional valve.
Further, two-way check valves 7 are arranged between the primary pressurizing energy accumulator group and the secondary pressurizing energy accumulator group and used for guaranteeing single flow of hydraulic energy, and the two energy accumulator groups work independently.
The booster accumulator group comprises an energy storage hydraulic pipeline and a plurality of accumulators connected to the hydraulic pipeline, one end of the energy storage hydraulic pipeline is connected with a rodless cavity of the lifting oil cylinder 4 through a one-way valve 7 through a direction control valve group, the one-way valve 7 is used for ensuring that hydraulic energy flows in a single way, and the other end of the energy storage hydraulic pipeline is connected with an oil inlet pipe of the speed control loop through the direction control valve group.
The hydraulic pipeline is connected with an electromagnetic overflow valve 10 and an oil supplementing and draining loop; the electromagnetic overflow valve 10 prevents the potential energy recovery device from being overloaded, and unloads the system when the pressure of the accumulator group is too high.
Further, the oil supplementing and draining loop comprises a pressure sensor, a speed regulating valve 15, a hydraulic lock 14 and an electromagnetic directional valve 13 which are connected in sequence. The energy accumulator is connected with one end of a speed regulating valve 15 through a hydraulic pipeline, the other end of the speed regulating valve 15 is sequentially connected with a hydraulic lock 14 and an electromagnetic directional valve 13, the action of the electromagnetic directional valve 13 is controlled through signals fed back by a pressure sensor, pressure is supplemented or released to the energy accumulator group, and the pressure of the energy accumulator group is kept constant.
The switch regulating and controlling valve set comprises four two-way directional control valves, namely a first two-way directional control valve, a second two-way directional control valve, a third two-way directional control valve and a fourth two-way directional control valve, and two groups of directional control valve sets are formed (namely the first two-way directional control valve and the second two-way directional control valve form one directional control valve set, the third two-way directional control valve and the fourth two-way directional control valve form the other directional control valve set), each two-way directional control valve is provided with a directional control cover plate, one end of the first two-way directional control valve is connected with a primary booster energy accumulator set and a secondary booster energy accumulator set, and the other end of the first two-way directional control valve is connected with a rodless cavity loop of the oil cylinder; one end of the second two-way direction control valve is connected with the speed control loop, and the other end of the second two-way direction control valve is connected with the oil cylinder rodless cavity loop; when the first two-way direction control valve is opened, the second two-way direction control valve must be closed, and vice versa; one end of a third two-way directional control valve is connected with the primary added energy accumulator group, and the other end of the third two-way directional control valve is connected with a main P pipe of the speed control loop; one end of a fourth two-way directional control valve is connected with the secondary booster accumulator group, and the other end of the fourth two-way directional control valve is connected with a main P pipe of the speed control loop; when the third two-way directional control valve is open, the fourth two-way directional control valve must be closed, and vice versa.
Further, the high-pressure ball valves 12 are responsible for manually controlling the switching function between the normal mode and the energy-saving mode, the number of the high-pressure ball valves 12 is 3, and the high-pressure ball valves 12 are respectively a first high-pressure ball valve 12.1, a second high-pressure ball valve 12.2 and a third high-pressure ball valve 12.3, and when the potential energy recovery device normally works, the high-pressure ball valves 12.3 are in a normally closed state.
Furthermore, the two ends of the second two-way directional control valve 9.2 are connected in parallel with overflow valves 11, and are responsible for adjusting pressure fluctuation which may be generated when the directional control valve 9.1 is closed and the directional control valve 9.2 is opened when the walking beam descends to the steel supporting position, so that the system can run stably.
Furthermore, a displacement sensor 5 is arranged on the lifting oil cylinder 4 and provides a feedback signal for a control loop; the system flow sensor 17 and the lift cylinder 4 displacement sensor jointly participate in controlling the opening and closing of the switch regulating valve group.
The number of the lifting oil cylinders 4 is two.
Further, the speed control loop comprises a balance valve 2, a proportional directional valve 1 and a pressure compensator 16 which are connected in sequence.
The potential energy recovery device energy accumulator groups are respectively provided with a pressure sensor, and closed-loop control is formed among the pressure sensors, the electromagnetic overflow valve 10 and the electromagnetic directional valve 13 and is used for maintaining the pressure of the energy accumulator groups to be constant. Each two-way directional control valve is a two-way cartridge valve.
The working process of the invention is as follows: before the energy-saving mode is started, the first high-pressure ball valve 12.1 and the second high-pressure ball valve 12.2 are in normally open states, the third high-pressure ball valve 12.3 is in a normally closed state, the two electromagnetic directional valves 13 are opened to the left position, and when the energy accumulator group 3 reaches a set pressure, the two electromagnetic directional valves 13 return to the middle position and the system is ready.
When the stepping Liang Kongzai ascends, the stepping beam firstly enters a gradual acceleration state, and the ascending and descending speed of the stepping beam is determined by the opening degree of the proportional reversing valve 1. Because the number of the working pumps running on line is reduced, the maximum flow of the system is limited, when the flow sensor 17 detects that the flow of the system is close to the maximum value, the third two-way directional control valve 9.3 is opened, and the primary pressurizing energy accumulator group consisting of the first energy accumulator 3.1 and the second energy accumulator 3.2 releases energy to speed up the system. When the oil cylinder displacement sensor detects that the walking beam is close to the steel billet, the opening degree of the proportional reversing valve 1 is reduced, when the flow sensor 17 detects that the flow passing through the oil cylinder is lower than the maximum flow of the system, the third two-way directional control valve 9.3 is closed, and the proportional reversing valve 1 controls the walking of Liang Huanman steel supporting.
When the step Liang Fuzai rises, the steps are repeated, when the flow of the system is close to the maximum value, the two-way direction control valve 9.4 is opened, and a secondary booster energy accumulator group consisting of the third energy accumulator 3.3-the sixth energy accumulator 3.6 releases energy to carry out secondary speed increase on the system. The control loop of the two-way directional control valve is superposed with a speed regulating valve 15 for regulating the opening and closing speed of the valve and ensuring the stable acceleration of the system.
When the stepping Liang Fuzai descends, the first two-way directional control valve 9.1 is opened, the second two-way directional control valve 9.2 is closed, the primary booster energy accumulator group and the secondary booster energy accumulator group jointly participate in recovering all gravitational potential energy generated when the stepping beam descends and providing back pressure, and the descending speed of the stepping beam is controlled by the proportional reversing valve 1 at the moment. When the oil cylinder displacement sensor 5 detects that the steel billet is about to contact with the walking beam of the heating furnace, the first two-way directional control valve 9.1 is closed, the second two-way directional control valve 9,2 is opened, the walking beam descends to be converted into conventional control at the moment, and the walking beam is controlled to descend to the low position by the proportional reversing valve 1. The overflow valve 11 is used for buffering inertia impact generated by the self-weight reduction of the walking beam when the first two-way directional control valve 9.1 and the second two-way directional control valve 9.2 are opened and closed.
After one step circulation, the first pressure sensor 8.1 and the second pressure sensor 8.2 can calibrate the pressure of the accumulator group, and the pressure of the accumulator group is maintained to reach a set value again through an oil supplementing/draining loop formed by the electromagnetic directional valve 13, the hydraulic lock 14 and the speed regulating valve 15. If the accumulator group absorbs excessive energy in the descending process of the walking beam to increase the pressure to a set upper line, the two electromagnetic overflow valves 10 are automatically opened to release the pressure of the system. The two check valves 7 and the first two-way directional control valve 9.1-the fourth two-way directional control valve 9.4 are jointly used for controlling the unidirectional flow of the recovered energy, and the check valve 7 is located at the foremost end of the potential energy recovery loop and arranged on an oil inlet pipe of the speed control loop and used for preventing the pressure of the system from being reduced and the energy of the energy accumulator group from being leaked due to the action of other equipment of the system in the oil supplementing process of the energy accumulator group. In addition, the set pressure of the accumulator groups 3.1-3.6 cannot be too high, otherwise the situation that the step Liang Quancheng is prevented from no-load descending may occur. Therefore, a third pressure sensor 8.3 is arranged on a rod cavity loop of the oil cylinder, when the pressure of the rod cavity reaches the system pressure and the oil cylinder does not act, the first two-way directional control valve 9.1 should be automatically closed, and the second two-way directional control valve 9.2 is opened. The speed regulating valves 15 are superposed on the control cover plates of the first two-way directional control valve 9.1 and the second two-way directional control valve 9.2 and are used for controlling the opening and closing speed of the valves, reducing impact loads generated when the valves are opened and closed and enabling the system to run stably.
The working principle of the invention is as follows: the walking beam lifting hydraulic control loop generally adopts a proportional valve to be matched with a pressure compensator 16 for speed control, hereinafter referred to as a speed control loop for short, and the invention is additionally provided with a set of potential energy recovery device on the basis of the speed control loop. The potential energy recovery device mainly comprises an energy accumulator group, a two-way directional control valve, a pressure sensor, a flow sensor, a single valve, an overflow valve and an oil supplementing loop. The energy accumulators are divided into a first group and a second group which are respectively a first energy accumulator group (namely a primary supercharged energy accumulator group) and a second energy accumulator group (namely a secondary supercharged energy accumulator group) and are responsible for jointly recovering all gravitational potential energy generated when the stepping Liang Fuzai descends, converting the gravitational potential energy into hydraulic energy to be stored in the high-pressure energy accumulator group and releasing the hydraulic energy twice when the next stepping beam ascends. The two-way direction control valve with the direction control cover plate is responsible for controlling the on-off of the energy-saving loop and participates in the control of the lifting of the walking beam together with the speed control loop.
When the stepping Liang Kongzai rises, the lifting oil cylinder 4 is accelerated step by a proportional reversing valve in a speed control loop, the number of working pumps which run on line is reduced, the maximum flow of the system is limited, the direction control valve of the first energy accumulator group is opened at the moment, the system is accelerated once, when a stepping beam is about to contact a steel billet, a displacement sensor arranged in the oil cylinder sends a signal to enable the stepping Liang Jiansu, the direction control valve of the first energy accumulator group is closed at the moment, and the speed is controlled by the proportional reversing valve.
When the load rises after the walking beam supports the steel, the lifting oil cylinder 4 is gradually accelerated by a proportional reversing valve in a speed control loop, when the maximum flow of the system is reached, the direction control valve of the second energy accumulator group is opened, when the walking beam is about to reach the highest position, the sensor still sends a signal, the control valve of the second energy accumulator group is closed, and the speed is gradually reduced to zero by the control of the proportional reversing valve.
Because the volume of the rod cavity of the oil cylinder is usually half of that of the rodless cavity, pressure oil can enter the rod cavity of the oil cylinder when the walking beam descends. To maintain the system duty cycle constant, at least 50% of the maximum flow rate of the system is required to participate in the speed control when the walking beam descends, and the remaining 50% is required to be recycled when the walking beam descends. Of course, the gravitational potential energy is higher as step Liang Fuzai descends.
When the stepping Liang Fuzai descends, the potential energy recovery device participates in work, a passage between the rodless cavity and the proportional reversing valve is cut off through the directional control valve, the speed control loop is responsible for controlling the ascending and descending speed of the stepping beam, and the potential energy recovery device is responsible for recovering all potential energy when the stepping Liang Fuzai descends and providing back pressure. After the steel billet is gradually decelerated and placed on the fixed beam of the heating furnace, the direction control valve cuts off the passage of the potential energy recovery device, the speed control loop controls the no-load walking beam to land stably, and the steps are repeated in such a way.
The potential energy recovery device is provided with an electromagnetic overflow valve 10, a pressure sensor and a flow sensor. The electromagnetic overflow valve 10 is used for realizing the overload protection and unloading functions of the system. The flow sensor is provided with an analog quantity signal, and when the flow of the walking beam ascending system is close to the maximum value, the opening and closing of the energy accumulator group are controlled. The pressure sensor is also provided with an analog quantity signal and is responsible for maintaining the constant pressure of the accumulator group when other equipment acts after each stepping circulation.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (10)
1. The potential energy recovery device of the hydraulic system of the stepping heating furnace is characterized by comprising a lifting oil cylinder, a speed control loop and a potential energy recovery device, oil ports of cavities at two ends of the lifting oil cylinder are respectively connected with the speed control loop, the potential energy recovery device is connected in parallel on a rodless cavity loop of the lifting oil cylinder, and a switch regulating valve group and a flow sensor are arranged on a connecting pipeline between the potential energy recovery device and the speed control loop.
2. The potential energy recovery device of the hydraulic system of the walking beam furnace according to claim 1, wherein the potential energy recovery device comprises two independent energy accumulator groups, namely a primary supercharged energy accumulator group and a secondary supercharged energy accumulator group, and the switch regulating valve group comprises two direction control valve groups, wherein one direction control valve group is positioned between the rodless cavity of the lifting oil cylinder and the energy accumulator group as well as between the two direction control valve groups and is used for controlling hydraulic energy converted from gravitational potential energy when the walking beam descends and is also used for controlling the switching operation between the energy-saving loop and the speed control loop; and the other group of directional control valve groups are positioned between the energy accumulator group and an oil inlet pipe of the speed control loop and are responsible for participating in the release process of the control energy.
3. The potential energy recovery device of the hydraulic system of the walking beam furnace according to claim 2, wherein the booster accumulator group comprises an energy storage hydraulic pipeline and a plurality of accumulators connected to the energy storage hydraulic pipeline, one end of the energy storage hydraulic pipeline is connected to the rodless cavity of the lift cylinder through a check valve via a direction control valve group, and the other end of the energy storage hydraulic pipeline is connected to the oil inlet pipe of the speed control loop via the direction control valve group.
4. The potential energy recovery device of the hydraulic system of the walking beam furnace as claimed in claim 3, wherein the energy storage hydraulic pipeline is connected with an electromagnetic overflow valve and an oil supplementing and draining loop.
5. The potential energy recovery device of the hydraulic system of the walking beam furnace as claimed in claim 4, wherein the oil supplementing and draining loop comprises a pressure sensor, a speed regulating valve, a hydraulic lock and an electromagnetic directional valve which are connected in sequence.
6. The potential energy recovery device of the hydraulic system of the walking beam furnace according to claim 2, wherein the switch regulating valve set comprises four two-way directional control valves, namely a first two-way directional control valve, a second two-way directional control valve, a third two-way directional control valve and a fourth two-way directional control valve, which form two groups of directional control valve sets, one end of the first two-way directional control valve is connected with the primary supercharged energy accumulator group and the secondary supercharged energy accumulator group, and the other end of the first two-way directional control valve is connected with the rodless cavity loop of the oil cylinder; one end of the second two-way direction control valve is connected with the speed control loop, and the other end of the second two-way direction control valve is connected with the oil cylinder rodless cavity loop; one end of a third two-way directional control valve is connected with the primary added energy accumulator group, and the other end of the third two-way directional control valve is connected with an oil inlet pipe of the speed control loop; one end of the fourth two-way directional control valve is connected with the secondary booster accumulator group, and the other end of the fourth two-way directional control valve is connected with an oil inlet pipe of the speed control loop.
7. The potential energy recovery device of the hydraulic system of the walking beam furnace as claimed in claim 6, wherein the two ends of the second two-way directional control valve are connected in parallel with overflow valves.
8. The potential energy recovery device of the hydraulic system of the walking beam furnace as claimed in claim 1, wherein the oil inlet pipe of the speed control loop is provided with a check valve for preventing the hydraulic oil from flowing back.
9. The potential energy recovery device of the hydraulic system of the walking beam furnace as claimed in claim 1, wherein the lift cylinder is provided with a displacement sensor.
10. The potential energy recovery device of the hydraulic system of the walking beam furnace according to claim 1, wherein the speed control circuit comprises a balance valve, a proportional reversing valve and a pressure compensator which are connected in sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211698084.1A CN115839364A (en) | 2022-12-28 | 2022-12-28 | Potential energy recovery device of hydraulic system of stepping heating furnace |
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| CN202211698084.1A CN115839364A (en) | 2022-12-28 | 2022-12-28 | Potential energy recovery device of hydraulic system of stepping heating furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116907223A (en) * | 2023-06-19 | 2023-10-20 | 广州白云液压机械厂有限公司 | Hydraulic potential energy recycling and energy saving system of stepping heating furnace |
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2022
- 2022-12-28 CN CN202211698084.1A patent/CN115839364A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116907223A (en) * | 2023-06-19 | 2023-10-20 | 广州白云液压机械厂有限公司 | Hydraulic potential energy recycling and energy saving system of stepping heating furnace |
| CN116907223B (en) * | 2023-06-19 | 2023-12-08 | 广州白云液压机械厂有限公司 | Hydraulic potential energy recycling and energy saving system of stepping heating furnace |
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