A segment erector energy recovery system

Abstract

The application discloses a pipe piece assembling machine energy recovery system, comprising a hydraulic pump, a proportional multi-way valve, a lifting oil cylinder, a first on-off valve, a second on-off valve, a hydraulic motor, a generator and an accumulator, wherein the hydraulic pump is used for supplying oil to the rod cavity and the rodless cavity of the lifting oil cylinder through the proportional multi-way valve; the first on-off valve is connected with the rodless cavity, the second on-off valve is connected with the rod cavity, the hydraulic motor is connected with the first on-off valve and the second on-off valve respectively, the first on-off valve is used for controlling the oil flow of the rodless cavity to the hydraulic motor, the second on-off valve is used for controlling the oil flow of the rod cavity to the hydraulic motor, the generator is connected with the hydraulic motor, the generator is used for converting the mechanical energy generated by the hydraulic motor into electric energy, and the accumulator is used for storing the electric energy. In the negative load working condition, the oil of the lifting oil cylinder can flow to the hydraulic motor by controlling the first on-off valve or the second on-off valve, so that the energy recovery purpose is achieved, and the energy waste can be effectively avoided.

Description

Technical Field

[0001] This application relates to the field of hydraulic systems, and in particular to an energy recovery system for a segment assembly machine. Background Technology

[0002] During tunnel boring machine (TBM) construction, segment assembly machines are used to install and line the segments. The segment assembly machine is powered by a separate hydraulic system. By controlling the actions of actuators such as hydraulic motors and hydraulic cylinders, it can realize longitudinal, radial, lateral, rotation, yaw, and pitch movements of the assembled segments, enabling the segments to be positioned and installed quickly and accurately.

[0003] During the use of the segment assembly machine, the lifting cylinder of the segment assembly machine has a certain negative load working area and bears typical gravity load. Even when the lifting cylinder of the segment assembly machine is lowered without load after completing the segment assembly, its own gravitational potential energy is still considerable.

[0004] Traditional tunnel segment assembly systems use lifting cylinders equipped with balance valves. Under heavy load conditions, the system operates by using a constant pressure pump to output high-pressure oil to a proportional multi-way valve, which then controls the extension and retraction of the lifting cylinder. Therefore, under heavy load conditions where gravity is applied, the system experiences throttling losses, and the balance valve consumes some of the system's energy, resulting in complete waste of the energy generated by the gravity load.

[0005] Therefore, how to provide an energy recovery system for a segment assembly machine is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide an energy recovery system for a segment assembly machine that can effectively solve the problem of energy waste.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0008] An energy recovery system for a segment assembly machine includes:

[0009] The hydraulic pump, proportional multi-way valve, and lifting cylinder are used to supply oil to the rod-side and rodless-side chambers of the lifting cylinder through the proportional multi-way valve.

[0010] The system comprises a first on-off valve, a second on-off valve, a hydraulic motor, a generator, and an energy storage device. The first on-off valve is connected to the rodless chamber of the lifting cylinder, and the second on-off valve is connected to the rod chamber of the lifting cylinder. The hydraulic motor is connected to both the first and second on-off valves. The first on-off valve controls the flow of oil from the rodless chamber of the lifting cylinder to the hydraulic motor, and the second on-off valve controls the flow of oil from the rod chamber of the lifting cylinder to the hydraulic motor. The generator is connected to the hydraulic motor and converts the mechanical energy generated by the hydraulic motor into electrical energy. The energy storage device stores the electrical energy generated by the generator.

[0011] Preferably, a first check valve is provided between the first on / off valve and the oil circuit of the rodless chamber of the lifting cylinder, and a second check valve is provided between the second on / off valve and the oil circuit of the rod chamber of the lifting cylinder.

[0012] Preferably, the system further includes an angle sensor, a stroke sensor, and a controller. The angle sensor is used to detect the area where the lifting cylinder is located, and the stroke sensor is used to detect the extension / retraction state of the lifting cylinder. When the angle sensor detects that the lifting cylinder is in the first energy recovery area and the stroke sensor detects that the lifting cylinder is in the extended state, the controller controls the first on / off valve to open, so that the oil in the rodless chamber of the lifting cylinder flows to the hydraulic motor. When the angle sensor detects that the lifting cylinder is in the second energy recovery area and the stroke sensor detects that the lifting cylinder is in the retracted state, the controller controls the second on / off valve to open, so that the oil in the rod chamber of the lifting cylinder flows to the hydraulic motor.

[0013] Preferably, a balance valve assembly is provided in the oil line between the proportional multi-way valve and the lifting cylinder.

[0014] Preferably, both the first on / off valve and the second on / off valve are electromagnetic ball valves.

[0015] Preferably, the energy storage device is a supercapacitor.

[0016] Compared with existing technologies, the above technical solution has the following advantages:

[0017] This application provides an energy recovery system for a tunnel segment assembly machine, comprising: a hydraulic pump, a proportional multi-way valve, a lifting cylinder, a first on-off valve, a second on-off valve, a hydraulic motor, a generator, and an energy storage device. The hydraulic pump supplies oil to the rod-side and rodless-side chambers of the lifting cylinder via the proportional multi-way valve. The first on-off valve is connected to the rodless-side chamber of the lifting cylinder, and the second on-off valve is connected to the rod-side chamber of the lifting cylinder. The hydraulic motor is connected to both the first and second on-off valves. The first on-off valve controls the flow of oil from the rodless-side chamber of the lifting cylinder to the hydraulic motor, and the second on-off valve controls the flow of oil from the rod-side chamber of the lifting cylinder to the hydraulic motor. The generator is connected to the hydraulic motor and converts the mechanical energy generated by the hydraulic motor into electrical energy. The energy storage device stores the electrical energy generated by the generator. Under heavy load conditions, by controlling the first or second on-off valve, the oil in the lifting cylinder can flow to the hydraulic motor to achieve energy recovery and effectively avoid energy waste. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An energy recovery system for a segment assembly machine is provided as one specific embodiment of this application;

[0020] Figure 2 A diagram showing the area where the lifting cylinder of an energy recovery system for a segment assembly machine is located, according to a specific embodiment of this application.

[0021] Figure 3 This application provides an energy recovery system for a segment assembly machine, which is another specific embodiment of the present application. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] Specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] Please refer to Figure 1 and Figure 2 .

[0025] One specific embodiment of this application provides an energy recovery system for a segment assembly machine, including: a hydraulic pump 22, a proportional multi-way valve, a lifting cylinder, a first on / off valve 13, a second on / off valve 14, a hydraulic motor 15, a generator 17, and an energy storage device 18. The hydraulic pump 22 supplies oil to the rod-side and rodless-side chambers of the lifting cylinder through the proportional multi-way valve. A balance valve assembly is provided on the oil line between the proportional multi-way valve and the lifting cylinder. The first on / off valve 13 is connected to the rodless-side chamber of the lifting cylinder, and the second on / off valve 14 is connected to the rod-side chamber of the lifting cylinder. The hydraulic motor 15 is connected to a first on-off valve 13 and a second on-off valve 14. The first on-off valve 13 controls the flow of oil from the rodless chamber of the lifting cylinder to the hydraulic motor 15, and the second on-off valve 14 controls the flow of oil from the rod chamber of the lifting cylinder to the hydraulic motor 15. A generator 17 is connected to the hydraulic motor 15 and converts the mechanical energy generated by the hydraulic motor 15 into electrical energy. An energy storage device 18, which can be a supercapacitor, stores the electrical energy generated by the generator 17. Under heavy load conditions, by controlling the first on-off valve 13 or the second on-off valve 14, the oil in the lifting cylinder can flow to the hydraulic motor 15 to achieve energy recovery and effectively avoid energy waste.

[0026] In some embodiments of this application, a first check valve is provided between the first on / off valve 13 and the oil passage of the rodless chamber of the lifting cylinder. This first check valve prevents oil from flowing back into the rodless chamber of the lifting cylinder. Similarly, a second check valve is provided between the second on / off valve 14 and the oil passage of the rod chamber of the lifting cylinder. This second check valve also prevents oil from flowing back into the rod chamber of the lifting cylinder. Both the first on / off valve 13 and the second on / off valve 14 can be selected as electromagnetic ball valves.

[0027] In some embodiments of this application, the segment assembly machine energy recovery system further includes an angle sensor 1, a stroke sensor, and a controller 21. The angle sensor 1 is used to detect the area where the lifting cylinder is located, such as... Figure 2 As shown, when the lifting cylinder of the segment assembly machine is located in region II (45° to 135°) or region IV (225° to 315°), it is the energy recovery zone of the lifting cylinder. Region II is designated as the first energy recovery zone, and region IV is designated as the second energy recovery zone. The stroke sensor is used to detect the extension and retraction state of the lifting cylinder. When the angle sensor 1 detects that the lifting cylinder is in the first energy recovery zone and the stroke sensor detects that the lifting cylinder is in the extended state, the controller 21 controls the first on-off valve 13 to open, allowing the oil in the rodless chamber of the lifting cylinder to flow to the hydraulic motor 15. When the angle sensor 1 detects that the lifting cylinder is in the second energy recovery zone and the stroke sensor detects that the lifting cylinder is in the retracted state, the controller 21 controls the second on-off valve 14 to open, allowing the oil in the rod chamber of the lifting cylinder to flow to the hydraulic motor 15.

[0028] The following explanation uses two sets of parallel lifting cylinders as an example, denoted as the first lifting cylinder 4 and the second lifting cylinder 10, respectively. Figure 1 As shown:

[0029] The electric motor 23 drives the hydraulic pump 22 to rotate. The hydraulic pump 22 delivers the oil in the oil tank 16 to the first proportional multi-way valve 20 and the second proportional multi-way valve 19 respectively. The first proportional multi-way valve 20 is connected to the first lifting cylinder 4 through the first balance valve group 7. The second proportional multi-way valve 19 is connected to the second lifting cylinder 10 through the second balance valve group 12. The first stroke sensor 3 is used to detect the extension and retraction stroke of the first lifting cylinder 4. The second stroke sensor 9 is used to detect the extension and retraction stroke of the second lifting cylinder 10. The ends of the extension rods of the first lifting cylinder 4 and the second lifting cylinder 10 are provided with tube suction cups 5 for adsorbing tubes. The rodless chamber of the first lifting cylinder 4 is connected to the first on-off valve 13 via the first check valve a2. The rodless chamber of the second lifting cylinder 10 is connected to the first on-off valve 13 via the first check valve b8. The rod chamber of the first lifting cylinder 4 is connected to the second on-off valve 14 via the second check valve a6. The rod chamber of the second lifting cylinder 10 is connected to the second on-off valve 14 via the second check valve b11. The controller 21 is connected to the angle sensor 1, the stroke sensor, the first on-off valve 13, and the second on-off valve 14, respectively. Its working principle is as follows:

[0030] When angle sensor 1 detects that the first lifting cylinder 4 and the second lifting cylinder 10 are located in region II (45°-135° area in the figure) or region IV (225°-315° area in the figure), angle sensor 1 inputs an angle signal to controller 21. After judgment by the controller 21's preset program, the lifting cylinder can enter the energy recovery mode. Operating the lifting cylinder in this mode can recover and store the energy of the lifting cylinder.

[0031] When angle sensor 1 detects that the first lifting cylinder 4 and the second lifting cylinder 10 are located in region II (region 45°-135° in the diagram) and the first stroke sensor 3 and the second stroke sensor 9 detect that the first lifting cylinder 4 and the second lifting cylinder 10 are in the extended state, the program of controller 21 determines whether the conditions for the segment assembly machine's energy recovery mode are met. If the conditions are met, the segment assembly machine can enter the energy recovery mode. At this time, if the energy recovery mode button is activated, the segment assembly machine can enter the energy recovery mode. By operating the retraction button of the first lifting cylinder 4 and the second lifting cylinder 10, controller 21 outputs a control signal to the first on / off valve 13, energizing electromagnet a3 and connecting the oil circuit. Meanwhile, electromagnet a4 of the second on / off valve 14, proportional electromagnets a1 and b1 of the first proportional multi-way valve 20, and proportional electromagnets a2 and b2 of the second proportional multi-way valve 19 are all de-energized, the oil circuit of the second on / off valve 14 is closed, and the first proportional multi-way valve 20 and the second proportional multi-way valve 19 operate in the neutral position. The high-pressure side oil flows in the rodless chambers of the first lifting cylinder 4 and the second lifting cylinder 10 under the action of gravity load. The oil in the rodless chamber of the first lifting cylinder 4 flows through the C2 and B3 ports of the first balance valve group 7 and then through the first check valve a2. At the same time, the oil in the rodless chamber of the second lifting cylinder 10 flows through the C4 and B4 ports of the second balance valve group 12 and then through the first check valve b8. The oil flowing into the two first check valves merges and then flows through the B5 port of the pipeline into the B6 and B7 ports of the first on-off valve 13, and then into the A and B ports of the hydraulic motor 15. It returns to the hydraulic oil tank 16 and drives the hydraulic motor 15 to rotate. The rotating hydraulic motor 15 drives the generator 17 to generate electricity. The electrical energy generated by the generator 17 is stored by the supercapacitor and then used by other power-consuming components. The low-pressure side oil flow direction is as follows: oil from the hydraulic oil tank 16 flows through the T1 and A1 ports of the first proportional multi-way valve 20, through the V1 and C1 ports of the first balance valve group 7, into the rod chamber of the first lifting cylinder 4 for replenishment. Simultaneously, oil flows through the T1 and A2 ports of the second proportional multi-way valve 19, through the V3 and C3 ports of the second balance valve group 12, into the rod chamber of the second lifting cylinder 10 for replenishment. When the first lifting cylinder 4 and the second lifting cylinder 10 retract to their positions, the cylinder stroke value detected by the stroke sensor is fed back to the controller 21. After program judgment, the controller 21 automatically exits the energy recovery mode, at which point the energy recovery mode ends.

[0032] When angle sensor 1 detects that the first lifting cylinder 4 and the second lifting cylinder 10 are located in area IV (225°-315° region in the figure) and the first stroke sensor 3 and the second stroke sensor 9 detect that the first lifting cylinder 4 and the second lifting cylinder 10 are in the retracted state, the program of controller 21 determines whether the conditions for the segment assembly machine's energy recovery mode are met. If the conditions are met, the segment assembly machine can enter the energy recovery mode. At this time, if the energy recovery mode button is activated, the segment assembly machine can enter the energy recovery mode. By operating the extension button of the first lifting cylinder 4 and the second lifting cylinder 10, controller 21 outputs a control signal to the second on / off valve 14, energizing electromagnet a4 and connecting the oil circuit. Meanwhile, electromagnet a3 of the first on / off valve 13, proportional electromagnets a1 and b1 of the first proportional multi-way valve 20, and proportional electromagnets a2 and b2 of the second proportional multi-way valve 19 are all de-energized. The oil circuit of the first on / off valve 13 is closed, and the first proportional multi-way valve 20 and the second proportional multi-way valve 19 operate in the neutral position. The high-pressure side oil flows in the rod chambers of the first lifting cylinder 4 and the second lifting cylinder 10 under the action of gravity load. The oil in the rod chamber of the first lifting cylinder 4 flows through ports C1 and A3 of the first balance valve group 7 and then through the second check valve a6. Simultaneously, the oil in the rod chamber of the second lifting cylinder 10 flows through ports C3 and A4 of the second balance valve group 12 and then through the second check valve b11. The oils flowing into the second check valve a6 and the second check valve b11 merge and flow through port A5 into ports A6 and A7 of the second on / off valve 14, then into ports A and B of the hydraulic motor 15, returning to the hydraulic oil tank 16 and driving the hydraulic motor 15 to rotate. The rotating hydraulic motor 15 drives the generator 17 to generate electricity. The electrical energy generated by the generator 17 is stored by a supercapacitor and then used by other power-consuming components. The low-pressure side oil flow direction is as follows: oil from the hydraulic oil tank 16 enters the rodless chamber of the first lifting cylinder 4 through the T1 and B1 ports of the first proportional multi-way valve 20 and the V2 and C2 ports of the first balance valve group 7 for replenishment; simultaneously, oil enters the rodless chamber of the second lifting cylinder 10 through the T1 and B2 ports of the second proportional multi-way valve 19 and the V4 and C4 ports of the second balance valve group 12 for replenishment. When the first lifting cylinder 4 and the second lifting cylinder 10 are extended to their positions, the cylinder stroke values ​​detected by the first stroke sensor 3 and the second stroke sensor 9 are fed back to the controller 21. After program judgment, the controller 21 automatically exits the energy recovery mode, at which point the energy recovery mode ends.

[0033] In addition to using the hydraulic motor 15 to drive the generator 17 to generate electricity, as described in the above embodiment, and storing the electricity in a supercapacitor, the energy recovery system of the tunnel segment assembly machine can also use an accumulator to recover the descending pressure energy for use by other hydraulic components, such as... Figure 3 As shown:

[0034] The first on / off valve 13 and the second on / off valve 14 are connected to the accumulator 24 via an oil circuit. After passing through the accumulator 24, the oil circuit is connected to the oil tank 16 via a ball valve 26. An overflow valve 25 is connected in parallel on the ball valve 26. A pressure gauge 27 is provided at the oil inlet of the ball valve 26. A third on / off valve 28 is also connected to the oil circuit of the first on / off valve 13 and the second on / off valve 14. The third on / off valve 28 is connected to the accumulator 24. The third accumulator 24 is also connected to the oil inlet of the first proportional multi-way valve 20 and the second proportional multi-way valve 19.

[0035] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy recovery system for a segment assembly machine, characterized in that, include: The hydraulic pump, the proportional multi-way valve, and the lifting cylinder are provided with hydraulic pump for supplying oil to the rod chamber and the rodless chamber of the lifting cylinder through the proportional multi-way valve. The system comprises a first on / off valve, a second on / off valve, a hydraulic motor, a generator, and an energy storage device. The first on / off valve is connected to the rodless chamber of the lifting cylinder, and the second on / off valve is connected to the rod chamber of the lifting cylinder. The hydraulic motor is connected to both the first and second on / off valves. The first on / off valve controls the flow of oil from the rodless chamber of the lifting cylinder to the hydraulic motor, and the second on / off valve controls the flow of oil from the rod chamber of the lifting cylinder to the hydraulic motor. The generator is connected to the hydraulic motor and converts the mechanical energy generated by the hydraulic motor into electrical energy. The energy storage device stores the electrical energy generated by the generator. Under heavy load conditions, the oil from the lifting cylinder is directed to the hydraulic motor by controlling either the first or second on / off valve. The system also includes an angle sensor, a stroke sensor, and a controller. The angle sensor detects the area where the lifting cylinder is located, and the stroke sensor detects the extension / retraction state of the lifting cylinder. When the angle sensor detects that the lifting cylinder is in a first energy recovery zone and the stroke sensor detects that the lifting cylinder is in an extended state, the controller controls the first on-off valve to open, while the oil circuit of the second on-off valve is closed, and the proportional multi-way valve operates in the neutral position, so that the oil in the rodless chamber of the lifting cylinder flows to the hydraulic motor. The first energy recovery zone is the area where the lifting cylinder is located between 45° and 135°. When the angle sensor detects that the lifting cylinder is in a second energy recovery zone and the stroke sensor detects that the lifting cylinder is in a retracted state, the controller controls the second on-off valve to open, while the oil circuit of the first on-off valve is closed, and the proportional multi-way valve operates in the neutral position, so that the oil in the rod chamber of the lifting cylinder flows to the hydraulic motor. The second energy recovery zone is the area where the lifting cylinder is located between 225° and 315°.

2. The segment assembly machine energy recovery system according to claim 1, characterized in that, A first check valve is provided between the first on / off valve and the oil circuit of the rodless chamber of the lifting cylinder, and a second check valve is provided between the second on / off valve and the oil circuit of the rod chamber of the lifting cylinder.

3. The segment assembly machine energy recovery system according to claim 1, characterized in that, A balance valve assembly is provided in the oil line between the proportional multi-way valve and the lifting cylinder.

4. The segment assembly machine energy recovery system according to claim 1, characterized in that, Both the first on / off valve and the second on / off valve are electromagnetic ball valves.

5. The segment assembly machine energy recovery system according to claim 1, characterized in that, The energy storage device is a supercapacitor.

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