CN113148884A

CN113148884A - Emergency power device and crane winch emergency hydraulic control system

Info

Publication number: CN113148884A
Application number: CN202110423570.1A
Authority: CN
Inventors: 任印美; 冀建飞; 李长青; 张永亮; 张可欣
Original assignee: Xuzhou Heavy Machinery Co Ltd
Current assignee: Xuzhou Heavy Machinery Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-07-23
Anticipated expiration: 2041-04-20
Also published as: CN113148884B

Abstract

The disclosure relates to an emergency power device and a crane winch emergency hydraulic control system. The emergency power device comprises: the pump station (1) is provided with an oil outlet communicated with the main oil supply path (f); the quick joint group (2) is communicated with the main oil supply way (f) through a pipeline and is configured to be connected with a hydraulic system under an emergency working condition; and the manual control valve group is arranged in a pipeline between the quick joint group (2) and the main oil supply way (f) and is configured to control the on-off and/or flow of the pipeline, so that the pump station (1) provides working hydraulic oil for the hydraulic system under the emergency working condition through the quick joint group (2). The embodiment of the disclosure can realize emergency supply of hydraulic oil for the action of the working machine without an external power supply.

Description

Emergency power device and crane winch emergency hydraulic control system

Technical Field

The disclosure relates to the field of hydraulic control, in particular to an emergency power device and a crane winch emergency hydraulic control system.

Background

Along with the development of the crane, the tonnage and the hoisting capacity of the crane are increased, the functions are increased, and the intelligent degree is also increased. Accordingly, maintenance of the crane becomes increasingly difficult. In the event of a fault, in particular during crane operations (for example during the installation of chemical plants, wind power plants, the maintenance of line plants), a long shutdown can result. Such operations generally require construction within a specific window period (for example, operations need to be completed within a limited time), and once a stoppage failure occurs, serious consequences and even dangers may result. For example, when a long-time shutdown occurs during wind power installation, the working equipment cannot be installed in the air or placed back on the ground, and a boom failure may be caused if a strong wind occurs.

In the related art, the hoisting hydraulic system includes an open hoisting hydraulic system and a closed hoisting hydraulic system. The open type winch hydraulic system utilizes an oil pump to carry out speed regulation of hoisting and utilizes a balance valve to carry out speed regulation of a load falling stage. The closed type hoisting hydraulic system utilizes the displacement change of the closed type oil pump to control the hoisting rise and fall speed. When the power system fails, the winch hydraulic system cannot work, in order to provide emergency power for the winch hydraulic system, in some related technologies, a vehicle-mounted storage battery is used as a power source, and the low-voltage direct-current motor is powered by the storage battery to drive a hydraulic oil pump to provide emergency power.

Disclosure of Invention

The inventor finds that the emergency power system in the related technology is limited by the fact that the power of a vehicle-mounted storage battery is small, the emergency power system is difficult to be applied to the emergency of a high-power crane hydraulic system, and the long-time emergency of the crane hydraulic system cannot be supported by long-time continuous work; in addition, the use of the vehicle-mounted storage battery has influence on an electrical system of the crane, the adopted hydraulic oil source comes from the crane, and the hydraulic pipeline connection is complex.

In view of this, the embodiments of the present disclosure provide an emergency power device and a crane hoisting emergency hydraulic control system, which can implement emergency supply of hydraulic oil for operation of a working machine without using an external power source.

In one aspect of the present disclosure, there is provided an emergency power device comprising:

the pump station is provided with an oil outlet communicated with the main oil supply path;

a quick coupling group in communication with the main oil supply line through a pipeline and configured to be connected with a hydraulic system in an emergency condition;

and the manual control valve group is arranged in a pipeline between the quick joint group and the main oil supply path and is configured to control the on-off and/or flow of the pipeline, so that the pump station can provide working hydraulic oil for the hydraulic system under the emergency working condition through the quick joint group.

In some embodiments, the pump station comprises: the output shaft of the engine is connected with the oil pump and used for driving the oil pump to run, and the safety valve is connected to the outlet of the oil pump.

In some embodiments, the set pressure of the safety valve is 3-15 MPa.

In some embodiments, the quick connector set includes a first quick connector in communication with the main fuel supply via a first line, and the manual control valve set includes a first manual valve connected in series with the first line.

In some embodiments, the quick connector set further comprises a second quick connector in direct communication with the main oil supply through a second line.

In some embodiments, the emergency power unit further comprises:

and a pressure detection element connected to the main oil supply passage and configured to detect an oil pressure of the main oil supply passage.

In some embodiments, the quick coupling set further includes a third quick coupling communicated with the main oil supply passage through a third pipeline, and the manual control valve set further includes a second manual valve, a throttle valve, and a first check valve connected in series to the third pipeline, the first check valve being in one-way communication in a direction from the third quick coupling to the main oil supply passage.

In some embodiments, a fourth pipeline connected in parallel with the third pipeline is further disposed between the third quick connector and the main oil supply channel, and the manual control valve group further includes a third manual valve and a second check valve connected in series on the fourth pipeline, and the second check valve is in one-way communication in a direction from the main oil supply channel to the third quick connector.

In some embodiments, the manual valve block further comprises:

and the speed regulating valve is connected in series on the third pipeline and is configured to regulate the flow of the working hydraulic oil passing through the third pipeline.

In one aspect of the present disclosure, there is provided a crane winding emergency hydraulic control system, including:

the crane hoisting open loop is provided with a first hoisting motor, a first hoisting brake and a one-way balance valve;

in the emergency power device, as described above,

the first hoisting brake is configured to brake the first hoisting motor, the one-way balance valve is connected between a hoisting port of the first hoisting motor and an oil tank, and a first quick connector of the emergency power device is connected with the open hoisting loop of the crane, and the first quick connector is communicated with a falling port of the hoisting motor, a control port of the hoisting brake and a control port of the one-way balance valve.

the crane hoisting closed loop is provided with a second hoisting motor and a second hoisting brake;

in the emergency power device, as described above,

the second hoisting brake is configured to brake the second hoisting motor, the first quick connector of the emergency power device is communicated with a control port of the second hoisting brake and is configured to realize control over the second hoisting brake, the second quick connector is communicated with a falling oil path of the second hoisting motor and is configured to supplement oil for the falling oil path of the second hoisting motor, and the third quick connector is communicated with a lifting oil path of the second hoisting motor and is configured to release pressure for the lifting oil path when the second hoisting motor falls.

In some embodiments, a fourth pipeline connected in parallel with the third pipeline is further arranged between the third quick connector and the main oil supply pipeline, the manual control valve group further comprises a third manual valve and a second check valve which are connected in series on the fourth pipeline, and the second check valve is in one-way communication in the direction from the main oil supply pipeline to the third quick connector; the third quick coupling is configured to charge a lifting oil path of the second hoisting motor at startup.

Therefore, according to the embodiment of the disclosure, the quick connector set is connected with the hydraulic system of the working machine under the emergency working condition, and the pump station and the manual control valve set are used for supplying the working hydraulic oil, so that the emergency supply of the hydraulic oil during the execution action of the working machine can be met without an external power supply (for example, a self-contained power supply of the working machine).

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

FIG. 1 is a hydraulic schematic diagram of some embodiments of an emergency power plant according to the present disclosure;

fig. 2 is a hydraulic schematic diagram of some embodiments of a crane hoist emergency hydraulic control system according to the present disclosure;

fig. 3 is a hydraulic schematic diagram of further embodiments of a crane hoist emergency hydraulic control system according to the present disclosure.

It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In some related technologies, a vehicle-mounted battery is used as a power source, and a low-voltage direct-current motor is powered by the battery to drive a motor pump to provide emergency power. The inventor finds that the emergency power system has small power and is not suitable for the emergency of the hydraulic system of the working machine with large power. The motor pump can not continuously work for a long time due to the limitation of the characteristics of the motor pump, so that the long-time emergency of a hydraulic system of the crane can not be met. In addition, as the motor pump adopts a vehicle-mounted storage battery as a power source, the energy storage capacity of the vehicle-mounted storage battery is small, the working time is short, and the use of an electric system of the crane can be influenced. The hydraulic oil source of the motor pump comes from the crane, the pipeline connection is complex, and the use is inconvenient. For a hoisting mechanism, one motor pump is difficult to realize emergency of hoisting and hoisting falling.

In view of this, the embodiments of the present disclosure provide an emergency power device, which can implement emergency supply of hydraulic oil for operation of a working machine without using an external power source.

Referring to fig. 1, in some embodiments, an emergency power plant includes: the device comprises a pump station 1, a quick connector group 2 and a manual control valve group. The pump station 1 has an oil outlet communicating with the main oil supply path f. The quick joint group 2 is communicated with the main oil supply channel f through a pipeline and is configured to be connected with a hydraulic system under an emergency working condition. The quick joint group 2 can comprise at least one quick joint, and can be quickly connected with a corresponding hydraulic oil way according to actual emergency working conditions.

The manual control valve group is arranged in a pipeline between the quick joint group 2 and the main oil supply path f and is configured to control the on-off and/or flow of the pipeline, so that the pump station 1 provides working hydraulic oil for the hydraulic system under the emergency working condition through the quick joint group 2. The manual control valve group can be manually operated by an operator to realize the on-off or flow control of the pipeline between the quick joint group and the main oil supply pipeline, so that the actual emergency working condition requirement is met.

Compared with an emergency power system which adopts a self-contained power supply of the working machine as a power source in the related art, the emergency supply of the hydraulic oil during the execution action of the working machine can be met without an external power supply (for example, the self-contained power supply of the working machine), and the electric system of the working machine cannot be influenced in use. The present embodiments are able to complete the relevant emergency actions even if the work machine's power system and electrical system are completely disabled.

Referring to fig. 1-3, in some embodiments, a pump station 1 includes: the engine comprises an engine 1.1, an oil pump 1.2 and a safety valve 1.3, wherein an output shaft of the engine 1.1 is connected with the oil pump 1.2 and used for driving the oil pump 1.2 to operate, and the safety valve 1.3 is connected at an outlet of the oil pump 1.2. The engine 1.1 can be a diesel engine or a gasoline engine, so that the pump station 1 can output higher power, meet the emergency of a hydraulic system of a high-power operation machine, work for a long time and meet the long-time emergency working condition of the operation machine (such as a crane). The pump station 1 may employ an oil tank independent of the operating machinery to simplify the oil circuit connection. In other embodiments, the oil pump 1.2 of the pump station 1 may also share an oil tank with the hydraulic system of the work machine. The safety valve 1.3 can adopt an overflow valve with adjustable overflow pressure. The specific oil pressure output of the pump station 1 can be realized by setting the overflow pressure of the safety valve 1.3. For example, the set pressure of the safety valve 1.3 is 3 to 15 MPa.

In fig. 1, the quick coupling group 2 comprises a first quick coupling 2.1 communicating with the main oil supply f through a first line f1, and the manual control valve group comprises a first manual valve 3.1 connected in series to the first line f 1. The first manual valve 3.1 may comprise a manual ball valve, or other form of manual valve, such as a manually switchable valve. For the open hydraulic system under the emergency working condition, the first quick connector 2.1 of the emergency power device can be connected with the hydraulic oil circuit of the open hydraulic system.

The quick coupling group 2 may also comprise a second quick coupling 2.2, communicating directly with said main oil supply f through a second line f 2. No manual valve may be provided in the second line f 2. Thus, the first quick connector 2.1 and the second quick connector 2.2 can be matched or selected for use, the second quick connector 2.2 can be adopted for an oil circuit needing continuous connection, and the first quick connector 2.1 can be adopted for an oil circuit needing controllable connection. For example, the second quick coupling 2.2 may be connected to a lifting oil path of the open type hoisting hydraulic system, and the first quick coupling 2.1 may be connected to a control port of a hoisting brake of the open type hoisting hydraulic system.

In order to monitor the load condition of the hydraulic system in real time in an emergency condition, referring to fig. 1, in some embodiments, the emergency power plant further comprises a pressure detection element 6. The pressure detection element 6 is connected to the main oil supply passage f and is configured to detect the oil pressure of the main oil supply passage f. The main oil supply path f is connected with the first pipeline f1 and the second pipeline f2, and can reflect the oil pressure change in the first pipeline f1 and the second pipeline f2 in real time, so that an operator can operate the emergency power device by observing the pressure detection element or receiving a feedback signal of the pressure detection element. The pressure detecting element 6 may comprise a pressure gauge or a pressure transmitter or the like.

In some embodiments, the group of quick couplings 2 further comprises a third quick coupling 2.3 communicating with the main oil supply f through a third line f3, and the set of manual valves further comprises a second manual valve 3.4, a throttle 3.2 and a first check valve 4.1 connected in series on the third line f 3. The second manual valve 3.4 can connect and disconnect the third pipeline f 3. The throttle valve 3.2 may be of a manual type, i.e. the opening of the throttle valve is manually controlled by an operator to effect control of the hydraulic oil flow and pressure through the third line f 3.

The first check valve 4.1 is in one-way communication in the direction from the third quick coupling 2.3 to the main oil supply path f. When the third quick coupling 2.3 is connected to an oil circuit with a higher load, the hydraulic oil of this oil circuit can flow to the main oil supply circuit f via the third line f3 and overflow back to the tank via the relief valve 1.3 of the pump station 1. The second manual valve 3.4 may comprise a ball valve, or other form of manual valve, such as a manually switchable valve.

For the closed hydraulic system under the emergency working condition, the first quick connector 2.1 or the second quick connector 2.2 of the emergency power device can be connected with a hydraulic oil line on one side of a motor of the closed hydraulic system, and the third quick connector 2.3 is connected with a hydraulic oil line on the other side of the motor of the closed hydraulic system. The pump station 1 can supply oil to the closed hydraulic system via the first oil path f1 or the second oil path f 2.

Referring to fig. 1, in some embodiments, the manual control valve group further comprises a speed valve 3.5 connected in series to the third line f 3. The speed valve 3.5 is configured to regulate the flow of working hydraulic oil through said third line f3 in order to regulate the throttle opening in a targeted manner in dependence on the actual operating speed of the working machine, for example in the winding-down phase of a closed system, in dependence on the weight-down speed. In some embodiments, the speed valve 3.5 may be a temperature compensated type speed valve in order to effectively eliminate the adverse effect of the temperature variation of the hydraulic oil.

Under some emergency conditions, portions of the hydraulic circuit of the work machine need to be filled as quickly as possible. Referring to fig. 1, in some embodiments, a fourth line f4 is also provided between the third quick coupling 2.3 and the main oil supply line f, in parallel with the third line f 3. The manual control valve group further comprises a third manual valve 3.3 and a second check valve 4.2 which are connected in series with the fourth pipeline f4, and the second check valve 4.2 is communicated in a one-way mode in the direction from the main oil supply pipeline f to the third quick joint 2.3. The one-way conduction direction of the second one-way valve 4.2 is opposite to the one-way conduction direction of the first one-way valve, and the fourth oil way can be cut off by turning off the third manual valve 3.3 when oil filling is not needed. The third manual valve 3.3 may comprise a ball valve, or another form of manual valve, such as a manually switchable valve.

In the embodiment, the emergency power device has the advantages of few related parts, compact structure, light weight, single carrying capability, simpler pipeline connection and convenient operation. The single emergency power device can realize the driving and control of a plurality of actions or a plurality of working components of the hydraulic system under the emergency working condition, such as the control of a hoisting brake, the oil supplement of the hoisting of a closed system, the control of the falling speed of the hoisting and the like.

The emergency power device can be used for emergency of various hydraulic control systems, and can realize emergency of an open hydraulic control system and emergency of a closed hydraulic control system.

Fig. 2 is a schematic diagram of hydraulic principles of some embodiments of a crane hoist emergency hydraulic control system according to the present disclosure. Referring to fig. 2, in some embodiments, a crane hoist emergency hydraulic control system includes: the crane winches open loop and the emergency power device. The crane hoisting open circuit has a first hoisting motor 9.1, a first hoisting brake 9.2 and a one-way balancing valve 9.3. The first hoist brake 9.2 is configured to brake the first hoist motor 9.1. The one-way balance valve 9.3 is connected between a lifting port B of the first hoisting motor 9.1 and an oil tank. Under the condition that a first quick coupling 2.1 of the emergency power device is connected with the open loop of the crane winch, the first quick coupling 2.1 is communicated with a falling port A of the winch motor 9.1, a control port X1 of the winch brake 9.2 and a control port X2 of the one-way balance valve 9.3.

For example, when the power system of the hoisting open loop of the crane fails, the first quick coupling 2.1 can be connected with the drop opening a of the hoisting motor 9.1. The engine 1.1 is started in advance to drive the oil pump 1.2 to operate, then the first manual valve 3.1 is opened, at the moment, hydraulic oil entering the open loop respectively enables the winch brake 9.2 to release the brake on the winch motor 9.1, and the one-way balance valve is opened, so that the winch falls.

In the aspect of safety control, an operator can still realize the starting and stopping of the emergency falling action of the winch through the winch control handle, and the handle can be stopped at any time when the winch speed exceeds the expectation so as to ensure the safety. At the moment, the anti-stall control of the crane is still effective, and when the pressure of a falling opening of the winch motor is smaller than a preset value (for example, 10bar), the winch brake is automatically closed, so that the winch is safely and effectively placed in an emergency. Meanwhile, an operator can timely operate the manual valve to stop the falling action of the winch according to the real-time monitoring of the outlet pressure of the emergency power device and the falling load pressure of the winch by the pressure gauge when abnormity occurs.

Fig. 3 is a schematic hydraulic schematic diagram of other embodiments of a crane hoisting emergency hydraulic control system according to the present disclosure. Referring to fig. 3, in some embodiments, the crane hoist emergency hydraulic control system includes a crane hoist closed circuit and the aforementioned emergency power device. The crane hoist closed circuit has a second hoist motor 8.1 and a second hoist brake 8.2. The second hoisting brake 8.2 is configured to brake the second hoisting motor 8.1.

The first quick coupling 2.1 of the emergency power device is communicated with the control port of the second hoisting brake 8.2 and is configured to realize the control of the second hoisting brake 8.2. The second quick coupling 2.2 is communicated with the dropping oil path fd of the second hoisting motor 8.1, and is configured to supplement oil to the dropping oil path fd of the second hoisting motor 8.1. The third quick coupling 2.3 is in communication with a lifting oil passage fr of the second hoist motor 8.1 and is configured to relieve the lifting oil passage fr when the second hoist motor 8.1 falls.

A fourth pipeline f4 connected with the third pipeline f3 in parallel is further arranged between the third quick connector 2.3 and the main oil supply pipeline f, the manual control valve group further comprises a third manual valve 3.3 and a second check valve 4.2 which are connected with the fourth pipeline f4 in series, and the second check valve 4.2 is communicated in a one-way mode in the direction from the main oil supply pipeline f to the third quick connector 2.3; the third quick coupling 2.3 is configured to charge the lifting oil path fr of the second hoisting motor 8.1 at start-up.

For example, when the power system of the hoisting closed loop of the crane fails, the first quick coupling 2.1 in the emergency power unit may be connected to the second hoisting brake 8.2, the second quick coupling 2.2 may be connected to the drop oil path fd, and the third quick coupling 2.3 may be connected to the hoisting oil path fr. The winch boost percentage is then adjusted to a preset value (e.g., 15%) to prevent the control valve of the second winch brake from not opening due to the secondary boost sequence. The third manual valve 3.3 and the second manual valve 3.4 are opened and the throttle valve 3.2 is closed.

The engine 1.1 is then started and the first quick coupling 3.1 is opened again. At the moment, an operator can operate the hoisting handle to open the hoisting brake. The throttle 3.2 is then slowly opened and the opening of the throttle 3.5 is then specifically adjusted as a function of the weight dropping speed.

In each of the embodiments of the crane hoisting emergency hydraulic control system of the present disclosure, the emergency power device can realize emergency boom raising and hoisting emergency lowering of the crane under the condition that the power of the crane completely fails without any external power supply.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An emergency power device, comprising:

the pump station (1) is provided with an oil outlet communicated with the main oil supply path (f);

the quick joint group (2) is communicated with the main oil supply way (f) through a pipeline and is configured to be connected with a hydraulic system under an emergency working condition;

and the manual control valve group is arranged in a pipeline between the quick joint group (2) and the main oil supply way (f) and is configured to control the on-off and/or flow of the pipeline, so that the pump station (1) provides working hydraulic oil for the hydraulic system under the emergency working condition through the quick joint group (2).

2. The emergency power plant according to claim 1, characterized in that the pump station (1) comprises: the engine oil pump comprises an engine (1.1), an oil pump (1.2) and a safety valve (1.3), wherein an output shaft of the engine (1.1) is connected with the oil pump (1.2) and used for driving the oil pump (1.2) to run, and the safety valve (1.3) is connected with an outlet of the oil pump (1.2).

3. The emergency power plant according to claim 2, characterized in that the set pressure of the safety valve (1.3) is 3-15 MPa.

4. Emergency power unit according to any of claims 1 to 3, characterised in that the quick coupling group (2) comprises a first quick coupling (2.1) communicating with the main oil supply (f) through a first line (f1), the manual control valve group comprising a first manual valve (3.1) connected in series on the first line (f 1).

5. Emergency power unit according to claim 4, characterised in that the quick coupling group (2) also comprises a second quick coupling (2.2) in direct communication with the main oil feed (f) through a second line (f 2).

6. The emergency power device of claim 4, further comprising:

and a pressure detection element (6) connected to the main oil supply passage (f) and configured to detect the oil pressure of the main oil supply passage (f).

7. Emergency power unit according to claim 5, characterised in that the quick coupling group (2) also comprises a third quick coupling (2.3) communicating with the main oil feed (f) through a third line (f3), the manual control group also comprising a second manual valve (3.4), a throttle (3.2) and a first non-return valve (4.1) connected in series on the third line (f3), the first non-return valve (4.1) being non-return in the direction from the third quick coupling (2.3) to the main oil feed (f).

8. The emergency power unit according to claim 7, characterized in that a fourth line (f4) is further provided between the third quick coupling (2.3) and the main oil supply line (f) in parallel with the third line (f3), the manual control valve group further comprising a third manual valve (3.3) and a second check valve (4.2) connected in series on the fourth line (f4), the second check valve (4.2) being in one-way communication in the direction from the main oil supply line (f) to the third quick coupling (2.3).

9. The emergency power device of claim 7, wherein the manual control valve pack further comprises:

a speed control valve (3.5) connected in series to the third line (f3) and configured to regulate the flow rate of the working hydraulic oil passing through the third line (f 3).

10. The utility model provides a hoist emergent hydraulic control system which characterized in that includes:

the crane hoisting open loop is provided with a first hoisting motor (9.1), a first hoisting brake (9.2) and a one-way balance valve (9.3);

the emergency power plant of any one of claims 4 to 9,

wherein, first hoist stopper (9.2) are configured as and brake first hoist motor (9.1), one-way balance valve (9.3) are connected between the play of first hoist motor (9.1) mouth (B) and oil tank first quick-operation joint (2.1) of emergency power device with under the open circuit connected state of hoist, first quick-operation joint (2.1) with the whereabouts mouth (A) of hoist motor (9.1), the control mouth (X1) of hoist stopper (9.2) and the control mouth (X2) of one-way balance valve (9.3) all communicate.

11. The utility model provides a hoist emergent hydraulic control system which characterized in that includes:

a crane hoisting closed loop, which is provided with a second hoisting motor (8.1) and a second hoisting brake (8.2);

the emergency power plant of any one of claims 7 to 9,

the second hoisting brake (8.2) is configured to brake the second hoisting motor (8.1), the first quick connector (2.1) of the emergency power device is communicated with a control port of the second hoisting brake (8.2) and is configured to realize control of the second hoisting brake (8.2), the second quick connector (2.2) is communicated with a falling oil path (fd) of the second hoisting motor (8.1) and is configured to supplement oil to the falling oil path (fd) of the second hoisting motor (8.1), and the third quick connector (2.3) is communicated with a lifting oil path (fr) of the second hoisting motor (8.1) and is configured to release the lifting oil path (fr) when the second hoisting motor (8.1) falls.

12. Crane hoisting emergency hydraulic control system according to claim 11, characterized in that a fourth line (f4) is further provided between the third quick coupling (2.3) and the main oil supply line (f) in parallel with the third line (f3), the manual control valve set further comprises a third manual valve (3.3) and a second check valve (4.2) connected in series on the fourth line (f4), the second check valve (4.2) is in one-way communication in the direction from the main oil supply line (f) to the third quick coupling (2.3); the third quick coupling (2.3) is configured to charge the lifting oil circuit (fr) of the second hoisting motor (8.1) when starting up.