阅读说明：本技术 无动力液压翻转系统 (Unpowered hydraulic turnover system ) 是由 杨永立 兰春立 阿斯嘎 陈国伟 陈世军 张俊超 李宁 丁柏辉 严雄涛 叶骏辉 于 2021-07-13 设计创作，主要内容包括：本发明涉及工程控制技术领域,具体而言,涉及一种无动力液压翻转系统,包括油气弹簧组件、控制组件和充放液组件；油气弹簧组件的一端与预设设备连接,用于当翻转设备下放时,储存能量,当翻转设备抬起时,释放能量；油气弹簧组件的另一端通过控制组件与充放液组件连接,用于其控制翻转设备的抬起、放下、锁定及翻转速度；充放液组件能够与动力泵连接。其能够简单高效地完成重物翻转,且实现了几乎零动力翻转。(The invention relates to the technical field of engineering control, in particular to an unpowered hydraulic turnover system, which comprises an oil-gas spring assembly, a control assembly and a liquid charging and discharging assembly, wherein the oil-gas spring assembly is arranged on the control assembly; one end of the hydro-pneumatic spring assembly is connected with preset equipment and used for storing energy when the turnover equipment is lowered down and releasing energy when the turnover equipment is lifted up; the other end of the hydro-pneumatic spring assembly is connected with the liquid charging and discharging assembly through a control assembly and is used for controlling the lifting, putting down, locking and overturning speeds of the overturning equipment; fill the tapping subassembly and can be connected with the power pump. It can accomplish the heavy object upset simply high-efficiently, and has realized nearly zero power upset.)

1. The utility model provides an unpowered hydraulic pressure upset system for will predetermine equipment and overturn, its characterized in that includes:

the oil-gas spring assembly, the control assembly and the liquid charging and discharging assembly are arranged on the oil-gas spring assembly;

one end of the hydro-pneumatic spring assembly is connected with the preset equipment and used for storing energy when the turnover equipment is lowered down and releasing energy when the turnover equipment is lifted up;

the other end of the hydro-pneumatic spring assembly is connected with the liquid charging and discharging assembly through a control assembly and is used for controlling the lifting, putting down, locking and overturning speeds of the overturning equipment;

the liquid charging and discharging assembly can be connected with the power pump.

2. The unpowered hydraulic rollover system of claim 1, wherein:

the hydro-pneumatic spring assembly comprises two turnover oil cylinders (2) and an energy accumulator (7);

and the rodless cavities of the two turnover oil cylinders (2) are connected with the energy accumulator (7).

3. The unpowered hydraulic rollover system of claim 2, wherein:

the hydro-pneumatic spring assembly comprises two air filters (1);

the two air filters (1) are respectively connected with rod cavities of the two turnover oil cylinders (2).

4. The unpowered hydraulic rollover system of claim 2, wherein:

the control assembly comprises an electromagnetic ball valve (3), a one-way throttle valve (11), a throttle valve (5) and a pressure sensor (8);

the rodless cavities of the two turnover oil cylinders (2) are connected with one end of the electromagnetic ball valve (3), and the other end of the electromagnetic ball valve (3) is connected with the throttle valve (5) through the one-way throttle valve (11);

one path of the outlet of the throttle valve (5) is connected with a pressure sensor (8) through an energy accumulator (7).

5. The unpowered hydraulic rollover system of claim 4, wherein:

the liquid charging and discharging assembly comprises a pressure relief throttle valve (6) and a high-pressure ball valve (9);

one path of the outlet of the throttle valve (5) is connected with a main oil inlet of the pump body through the energy accumulator (7), the pressure sensor (8) and the high-pressure ball valve (9) in sequence;

and the other path of the outlet of the throttle valve (5) is connected with a main oil return port of the pump body through the pressure relief throttle valve (6).

6. The unpowered hydraulic rollover system of claim 1, wherein:

firstly, putting a heavy object on the overturning equipment in the vertical direction, wherein the overturning oil cylinder (2) is in a fully retracted state, and calculating the charging pressure P0 and the charging pressure P1 of the accumulator (7);

then the bladder of the energy accumulator (7) is filled with nitrogen according to the inflation pressure P0 to drive the turnover equipment to turn over from the vertical position to the horizontal position, then the heavy object is removed, and finally the turnover equipment is turned over from the horizontal position to the vertical position.

7. The unpowered hydraulic rollover system of claim 6, wherein:

when liquid is filled, the pressure relief throttle valve (6) is closed, the high-pressure ball valve (9) is opened, the external hydraulic oil source is started, hydraulic oil enters a steel cylinder of the energy accumulator (7) through the high-pressure ball valve (9), an air bag of the energy accumulator (7) is compressed, the energy accumulator (7) is filled with liquid, and when the liquid filling pressure P1 is reached, the high-pressure ball valve (9) is closed and the external hydraulic oil source is stopped;

when the charging pressure of the energy accumulator (7) is too high, the energy accumulator (7) needs to be discharged, the high-pressure ball valve (9) and the pressure relief throttle valve (6) are both closed, the pressure relief throttle valve (6) is opened and closed slowly until liquid flows back to an oil tank externally connected with a hydraulic oil source through the pressure relief throttle valve (6), and the pressure relief throttle valve (6) is closed completely immediately after the charging pressure P1 is reached;

after the liquid charging and discharging are finished, the external hydraulic oil source is disconnected on the premise that the high-pressure ball valve (9) and the pressure relief throttle valve (6) are closed.

8. The unpowered hydraulic rollover system of claim 6, wherein:

on the premise that the turnover equipment is free of heavy objects and is in a horizontal position, the electromagnetic ball valve (3) is electrified, so that the electromagnetic ball valve (3) is in a conducting state, and at the moment, a bladder of the energy accumulator (7) compresses liquid in the energy accumulator (7) and enters a rodless cavity of the turnover oil cylinder (2) through the throttle valve (5), the one-way throttle valve (11) and the electromagnetic ball valve (3);

the overturning oil cylinder (2) extends out, the overturning equipment starts to lift up until the electromagnetic ball valve (3) is powered off and is cut off or the overturning oil cylinder (2) completely extends out, and at the moment, the overturning equipment reaches the required lifting position.

9. The unpowered hydraulic rollover system of claim 8, wherein:

on the premise that the electromagnetic ball valve (3) is powered off and cut off and the turnover equipment is located at a required lifting position, a heavy object is placed on the turnover machine, the electromagnetic ball valve (3) is powered on, the electromagnetic ball valve (3) is in a conducting state, and oil in a rodless cavity of the turnover oil cylinder (2) is under the action of load;

a leather bag of the energy accumulator (7) is compressed through the electromagnetic ball valve (3), the one-way throttle valve (11) and the throttle valve (5) to enter a steel cylinder of the energy accumulator (7), the turnover oil cylinder (2) retracts, the turnover equipment starts to be put down until the electromagnetic ball valve (3) is cut off in a power failure mode or the turnover oil cylinder (2) retracts completely, and the turnover equipment reaches a required putting down position at the moment;

and on the premise that the electromagnetic ball valve (3) is cut off when the power is cut off and the overturning equipment is in a required laying-down position, removing the heavy object from the overturning machine.

10. The unpowered hydraulic rollover system of claim 9, wherein:

the overturning speed of the overturning equipment is set by a one-way throttle valve (11) and a throttle valve (5), and the opening degree of the throttle valve (5) is set to be larger than that of the one-way throttle valve (11);

when the turnover equipment is lifted, the one-way valve of the one-way throttle valve (11) is opened, the extending speed of the oil cylinder is determined by the opening degree of the throttle valve (5), and the lifting speed of the turnover equipment is determined by the opening degree of the throttle valve (5);

when the turnover equipment is laid down, the one-way valve of the one-way throttle valve (11) is closed, and the opening degree of the throttle valve (5) is larger than that of the one-way throttle valve (11), so that the laying-down speed of the turnover equipment is determined by the opening degree of the one-way throttle valve (11).

Technical Field

The invention relates to the technical field of engineering control, in particular to an unpowered hydraulic overturning system.

Background

Existing weight inverting devices often utilize hydraulic systems.

As shown in fig. 1, such a hydraulic system has a disadvantage that a hydraulic pump is required to continuously supply oil to a control valve set, so as to push a roll-over cylinder to extend and retract, thereby turning over the roll-over equipment. The hydraulic pump needs to be externally connected with a power supply to supply oil to the system, so that power and energy are consumed.

Disclosure of Invention

Objects of the invention include, for example, providing an unpowered hydraulic rollover system that is capable of performing weight rollover simply and efficiently, and that achieves nearly zero-power rollover.

Embodiments of the invention may be implemented as follows:

in a first aspect, the present invention provides an unpowered hydraulic turning system for turning a preset device, including:

the oil-gas spring assembly, the control assembly and the liquid charging and discharging assembly are arranged on the oil-gas spring assembly;

one end of the hydro-pneumatic spring assembly is connected with the preset equipment and used for storing energy when the turnover equipment is lowered down and releasing energy when the turnover equipment is lifted up;

the other end of the hydro-pneumatic spring assembly is connected with the liquid charging and discharging assembly through a control assembly and is used for controlling the lifting, putting down, locking and overturning speeds of the overturning equipment;

the liquid charging and discharging assembly can be connected with the power pump.

The unpowered hydraulic overturning system has the advantages that the weight is firstly placed on the overturning equipment in the vertical direction, then the overturning equipment is driven to overturn from the vertical direction to the horizontal position, then the weight is moved away, and finally the overturning equipment is overturned from the horizontal direction to the vertical position, so that unpowered hydraulic overturning with zero energy consumption is realized.

In an alternative embodiment, the hydro-pneumatic spring assembly includes two tilt cylinders and an accumulator;

and the rodless cavities of the two turnover oil cylinders are connected with the energy accumulator.

In an alternative embodiment, the hydro-pneumatic spring assembly includes two air cleaners;

and the two air filters are respectively connected with rod cavities of the two turnover oil cylinders.

In an alternative embodiment, the control assembly includes a solenoid ball valve, a one-way throttle valve, a throttle valve, and a pressure sensor;

the rodless cavities of the two turnover oil cylinders are connected with one end of the electromagnetic ball valve, and the other end of the electromagnetic ball valve is connected with the throttle valve through the one-way throttle valve;

one path of the throttle valve outlet is connected with the pressure sensor through the energy accumulator.

In an optional embodiment, the liquid charging and discharging assembly comprises a pressure relief throttle valve and a high-pressure ball valve;

one path of the outlet of the throttle valve is connected with a main oil inlet of the pump body through the energy accumulator, the pressure sensor and the high-pressure ball valve in sequence;

and the other path of the throttle valve outlet is connected with a main oil return port of the pump body through the pressure relief throttle valve.

In an alternative embodiment, the weight is first placed on the upender in the vertical direction, with the upender cylinder in the fully retracted state, by calculating the charge pressure P0 and the charge pressure P1 of the accumulator;

then the energy accumulator leather bag is firstly filled with nitrogen according to the inflation pressure P0 to drive the turnover equipment to turn over from the vertical position to the horizontal position, then the heavy object is removed, and finally the turnover equipment is turned over from the horizontal position to the vertical position.

In an optional embodiment, during liquid filling, the pressure relief throttle valve is closed, the high-pressure ball valve is opened, the external hydraulic oil source is started, hydraulic oil enters a steel cylinder of the energy accumulator through the high-pressure ball valve, an air bag of the energy accumulator is compressed, the energy accumulator is filled with liquid, and when the liquid filling pressure P1 (which can be set by a pressure regulating valve of the external hydraulic oil source) is reached, the high-pressure ball valve is closed and the external hydraulic oil source is stopped;

when the charging pressure of the energy accumulator is too high, the energy accumulator needs to be discharged, the high-pressure ball valve and the pressure relief throttle valve are both closed, the pressure relief throttle valve is opened and closed slowly until liquid flows back to an oil tank externally connected with a hydraulic oil source through the pressure relief throttle valve, and the pressure relief throttle valve is closed completely immediately after the charging pressure P1 is reached;

after the liquid charging and discharging are finished, the external hydraulic oil source is disconnected on the premise that the high-pressure ball valve and the pressure relief throttle valve are both closed.

In an optional implementation mode, on the premise that the turnover equipment is free of heavy objects and is in a horizontal position, the electromagnetic ball valve is electrified to be in a conducting state, at the moment, a leather bag of the energy accumulator compresses liquid in the energy accumulator, and the liquid enters a rodless cavity of the turnover oil cylinder through the throttle valve, the one-way throttle valve and the electromagnetic ball valve;

and (4) the overturning oil cylinder extends out, the overturning equipment starts to lift until the electromagnetic ball valve is powered off and is stopped or the overturning oil cylinder extends out completely, and at the moment, the overturning equipment reaches the required lifting position.

In an optional implementation mode, on the premise that the electromagnetic ball valve is powered off and is cut off and the turnover equipment is located at a required lifting position, a heavy object is placed on the turnover machine, the electromagnetic ball valve is powered on, the electromagnetic ball valve is in a conducting state, and at the moment, oil in a rodless cavity of the turnover oil cylinder is under the action of load;

the leather bag of the energy accumulator is compressed through the electromagnetic ball valve, the one-way throttle valve and the throttle valve to enter a steel cylinder of the energy accumulator, the turnover oil cylinder retracts, and the turnover equipment starts to put down until the electromagnetic ball valve is cut off or the turnover oil cylinder retracts completely, and the turnover equipment reaches the required putting down position;

and removing the heavy object from the tilter on the premise that the electromagnetic ball valve is cut off when the power is cut off and the tilter is at a required laying-down position.

In an alternative embodiment, the turning speed of the turning device is set by a one-way throttle valve and a throttle valve, and the opening degree of the throttle valve is set to be greater than that of the one-way throttle valve;

when the turnover equipment is lifted, because the one-way valve of the one-way throttle valve is opened, the extending speed of the oil cylinder is determined by the opening degree of the throttle valve, and the lifting speed of the turnover equipment is determined by the opening degree of the throttle valve;

when the turnover equipment is put down, the one-way valve of the one-way throttle valve is closed, and the opening degree of the throttle valve is larger than that of the one-way throttle valve, so that the putting-down speed of the turnover equipment is determined by the opening degree of the one-way throttle valve.

The beneficial effects of the embodiment of the invention include, for example:

the unpowered hydraulic turnover system comprises an oil-gas spring assembly, a control assembly and a liquid charging and discharging assembly. The overturning device has the advantages that the overturning device can be firstly placed on the overturning device in the vertical direction, then the overturning device is driven to overturn from the vertical direction to the horizontal position, then the heavy object is moved away, and finally the overturning device is overturned from the horizontal direction to the vertical position, so that unpowered hydraulic overturning with zero energy consumption is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a prior art flipping system;

fig. 2 is a schematic diagram of an unpowered hydraulic rollover system according to an embodiment of the invention.

Icon: 10-hydraulic lock; 11-one-way throttle valve; 12-a solenoid directional valve; 13-a hydraulic pump; 1-an air filter; 2-turning over the oil cylinder; 3-an electromagnetic ball valve; 4-one-way throttle valve; 5-a throttle valve; 6-pressure relief throttle valve; 7-an accumulator; 8-a pressure sensor; 9-high pressure ball valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic view of a hydraulic system of a conventional weight overturning system. As shown in fig. 1, the hydraulic system mainly comprises a turnover cylinder 2, a control valve group (comprising a hydraulic lock 10, a one-way throttle valve 11 and an electromagnetic directional valve 12), and a hydraulic pump 13. As shown in the figure, when the electromagnet on the left side of the electromagnetic directional valve 12 is electrified, the electromagnetic directional valve 12 is in the left position, and the overturning oil cylinder 2 retracts, so that the overturning equipment is pulled to the horizontal position from the vertical position; when the electromagnet on the right side of the electromagnetic reversing valve 12 is electrified, the electromagnetic reversing valve 12 is positioned on the right position, and the overturning oil cylinder 2 extends out, so that the overturning equipment is pushed to the vertical position from the horizontal position; when the two electromagnets of the electromagnetic directional valve 12 are powered off, the electromagnetic directional valve 12 is in a middle position, the overturning oil cylinder 2 is kept at the current position under the action of the hydraulic lock 10, and therefore the overturning equipment is kept at the current position; the opening size of the one-way throttle valve 11 is adjusted to control the stretching speed of the hydraulic cylinder, so that the overturning speed of the overturning equipment is controlled.

The hydraulic system has the disadvantage that the hydraulic pump 13 is required to continuously supply oil to the control valve group, so that the overturning oil cylinder 2 is pushed to stretch and retract, and the overturning of the overturning equipment is realized. The hydraulic pump 13 needs to be externally connected with a power supply to supply oil to the system, so that power and energy are consumed.

To improve the above technical problem, the following embodiments provide an unpowered hydraulic rollover system.

Referring to fig. 2, the embodiment provides an unpowered hydraulic turning system for turning a preset device, which includes a hydro-pneumatic spring assembly, a control assembly and a liquid charging and discharging assembly.

One end of the hydro-pneumatic spring assembly is connected with the preset equipment and used for storing energy when the turnover equipment is lowered down and releasing energy when the turnover equipment is lifted up;

the other end of the hydro-pneumatic spring assembly is connected with the liquid charging and discharging assembly through a control assembly and is used for controlling the lifting, putting down, locking and overturning speeds of the overturning equipment;

the liquid charging and discharging assembly can be connected with the power pump.

Further, the hydro-pneumatic spring system comprises an energy accumulator 7, a turnover oil cylinder 2 and an air filter 1, and the hydro-pneumatic spring system has the functions of storing energy when the turnover equipment is placed downwards and releasing energy when the turnover equipment is lifted.

The control component comprises an electromagnetic ball valve 3, a one-way throttle valve 4, a throttle valve 5 and a pressure sensor 8 and is used for controlling the lifting, putting down, locking and overturning speeds of the overturning equipment.

The liquid charging and discharging assembly comprises a pressure discharging throttle valve 6 and a high-pressure ball valve 9.

The charging pressure P0 and the charging pressure P1 of the energy accumulator 7 are calculated (at this time, the turnover oil cylinder 2 is in a fully retracted state), so that the turnover device just achieves the application scene of the unpowered hydraulic turnover system of the patent, namely, firstly, a heavy object is placed on the turnover device in the vertical direction, then, the turnover device is driven to turn over from the vertical direction to the horizontal position, then, the heavy object is removed, finally, the turnover device is turned over from the horizontal direction to the vertical position, and then, nitrogen is charged into a leather bag of the energy accumulator 7 according to the charging pressure P0 (the energy accumulator 7 is ensured to be in a fully decompressed state during charging).

Connecting a liquid filling port P of the system with an oil supply port of an external hydraulic oil source, and connecting an oil drainage port T of the system with an oil return port of the external hydraulic oil source; when filling liquid (before filling liquid, firstly, ensuring that the electromagnetic ball valve 3 is in a power-off cut-off state and the turnover oil cylinder 2 is in a fully retracted state), closing the pressure relief throttle valve 6, opening the high-pressure ball valve 9, starting an external hydraulic oil source, enabling hydraulic oil to enter a steel cylinder of the energy accumulator 7 through the high-pressure ball valve 9, compressing an air bag of the energy accumulator 7, filling liquid into the energy accumulator 7, and closing the high-pressure ball valve 9 and stopping the external hydraulic oil source when a liquid filling pressure P1 (which can be set by a pressure regulating valve of the external hydraulic oil source) is reached;

when the charging pressure of the energy accumulator 7 is too high (system maintenance), the energy accumulator 7 needs to be discharged (before discharging, the electromagnetic ball valve 3 is firstly ensured to be in a power-off cut-off state, and the turnover oil cylinder 2 is in a fully retracted state), at the moment, the high-pressure ball valve 9 and the pressure-relief throttle valve 6 are both closed, the pressure-relief throttle valve 6 is slowly opened and closed until liquid begins to flow back to an oil tank externally connected with a hydraulic oil source through the pressure-relief throttle valve 6, and the pressure-relief throttle valve 6 is completely closed immediately after the charging pressure P1 is reached;

after the liquid charging and discharging are finished, the external hydraulic oil source is disconnected on the premise that the high-pressure ball valve 9 and the pressure relief throttle valve 6 are both closed.

Further, the specific processes of the flipping apparatus are set forth below, respectively.

The overturning equipment is lifted: on the premise that the overturning equipment is not provided with a heavy object and is in a horizontal position (at the moment, the pressure of liquid in the energy accumulator 7 is higher than the pressure of the overturning equipment on a rodless cavity of the overturning oil cylinder 2, a rod cavity of the overturning oil cylinder 2 is connected with the atmosphere through the air filter 1, and the pressure of the rod cavity of the overturning oil cylinder 2 is zero), the electromagnetic ball valve 3 is electrified, so that the electromagnetic ball valve 3 is in a conducting state, and at the moment, a leather bag of the energy accumulator 7 compresses the liquid in the energy accumulator 7;

the overturning device enters a rodless cavity of the overturning oil cylinder 2 through the throttle valve 5, the one-way throttle valve 4 (the one-way valve of the one-way throttle valve 4 is opened) and the electromagnetic ball valve 3, the overturning oil cylinder 2 extends out, the overturning device starts to lift up until the electromagnetic ball valve 3 is cut off in a power-off mode or the overturning oil cylinder 2 extends out completely, and the overturning device reaches the required lifting position at the moment.

The overturning equipment is put down: when the electromagnetic ball valve 3 is powered off and cut off (at the moment, oil in a rodless cavity of the turnover oil cylinder 2 is completely sealed, and the position of turnover equipment is locked), and the turnover equipment is located at a required lifting position, a heavy object is placed on a turnover machine (at the moment, the pressure of liquid in an energy accumulator 7 is lower than the pressure of the turnover equipment and the heavy object which are added on the rodless cavity of the turnover oil cylinder 2 together, a rod cavity of the turnover oil cylinder 2 is connected with the atmosphere through an air filter 1, and the pressure of the rod cavity of the turnover oil cylinder 2 is zero), and the electromagnetic ball valve 3 is powered on, so that the electromagnetic ball valve 3 is in a conducting state;

at the moment, oil in a rodless cavity of the turnover oil cylinder 2 enters a steel cylinder of the energy accumulator 7 through the electromagnetic ball valve 3, the one-way throttle valve 4 (the one-way valve of the one-way throttle valve 4 is closed) and the throttle valve 5 to compress a leather bag of the energy accumulator 7 under the action of load, the turnover oil cylinder 2 retracts, the turnover equipment starts to be put down until the electromagnetic ball valve 3 is powered off and the turnover oil cylinder 2 retracts completely, and the turnover equipment reaches a required putting down position at the moment.

And (3) removing the heavy object from the tilter on the premise that the electromagnetic ball valve 3 is cut off (at the moment, the oil in the rodless cavity of the tilting oil cylinder 2 is completely sealed, and the position of the tilting equipment is locked) and the tilting equipment is at the required laying-down position.

Setting the overturning speed of the overturning equipment: the reversing speed of the reversing device is set by the one-way throttle valve 4 and the throttle valve 5, and the opening degree of the throttle valve 5 is set to be larger than that of the one-way throttle valve 4.

When the turnover equipment is lifted, the one-way valve of the one-way throttle valve 4 is opened, and the extending speed of the oil cylinder is determined by the opening degree of the throttle valve 5, namely the lifting speed of the turnover equipment is determined by the opening degree of the throttle valve 5;

when the turnover equipment is put down, the one-way valve of the one-way throttle valve 4 is closed, and the opening degree of the throttle valve 5 is larger than that of the one-way throttle valve 4, so that the retraction speed of the oil cylinder is determined by the opening degree of the one-way throttle valve 4, namely the lowering speed of the turnover equipment is determined by the opening degree of the one-way throttle valve 4.

The overturning equipment can be unpowered and overturned with zero energy consumption by repeating the lifting and putting processes of the overturning equipment.

The unpowered hydraulic turnover system provided by the embodiment at least has the following advantages:

the hydraulic overturning equipment has the advantages that the weight is firstly placed on the overturning equipment in the vertical direction, then the overturning equipment is driven to overturn from the vertical direction to the horizontal position, then the weight is moved away, and finally the overturning equipment is overturned from the horizontal direction to the vertical position, so that the hydraulic overturning equipment without power and zero energy consumption is realized.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.