CN115653964A

CN115653964A - Multi-way valve with microswitch and moment integrated control system

Info

Publication number: CN115653964A
Application number: CN202211518402.1A
Authority: CN
Inventors: 商晓恒; 任路遥; 余旋; 李涛; 陈磊
Original assignee: Xuzhou XCMG Truck Mounted Crane Co Ltd
Current assignee: Xuzhou XCMG Truck Mounted Crane Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-01-31

Abstract

The invention belongs to the field of hydraulic control, and particularly relates to a multi-way valve with a microswitch and a moment integrated control system, wherein the multi-way valve comprises a first oil inlet joint, a telescopic control joint, a variable amplitude control joint and a winch control joint; the telescopic control unit comprises a telescopic reversing valve, a telescopic micro switch is arranged on an end cover of the telescopic reversing valve, and a telescopic valve core push rod movably arranged on the telescopic reversing valve is configured to control the on-off of the telescopic micro switch; the variable-amplitude control unit comprises a variable-amplitude reversing valve, an end cover of the variable-amplitude reversing valve is provided with a variable-amplitude joint microswitch, and a variable-amplitude joint valve core push rod movably arranged on the variable-amplitude reversing valve is configured to control the on-off of the variable-amplitude joint microswitch. The end covers of the multi-way valve telescopic control link, the variable amplitude control link and the winch control link are provided with micro switches, valve cores of the multi-way valve telescopic control link, the variable amplitude control link and the winch control link move to drive the valve core push rods to open and close the micro switches, and the torque system confirms whether the torque limitation identification function needs to be opened or not according to the opening and closing state of the micro switches.

Description

Multi-way valve with microswitch and moment integrated control system

Technical Field

The invention belongs to the field of hydraulic control, and particularly relates to a multi-way valve with a microswitch and a torque integrated control system.

Background

When the straight-arm lorry-mounted crane confluence system performs stretching and amplitude changing of an arm body and lifting action of a hoisting mechanism, a moment limiting function needs to be added for safety. The scheme of adding a plurality of electromagnetic unloading valves to realize the torque limiting function has the problems of poor integration level, low universality and the like; the scheme that the torque limiting function is realized by the multi-way valve integrated position detection sensing device has the problems of high complexity, poor economy and complex maintenance.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a multi-way valve with a microswitch and a torque integrated control system.

The invention is realized by the following technical scheme: a multi-way valve with a microswitch comprises a first oil inlet joint, a telescopic control joint, a variable amplitude control joint and a winch control joint;

the telescopic control link comprises a telescopic reversing valve, a first oil inlet of the multi-way valve is communicated towards an oil inlet of the telescopic reversing valve in a one-way mode, a telescopic link microswitch is arranged on an end cover of the telescopic reversing valve, and a telescopic link valve core push rod movably arranged on the telescopic reversing valve is configured to control the on-off of the telescopic link microswitch;

the variable-amplitude control unit comprises a variable-amplitude reversing valve, a first oil inlet of the multi-way valve is communicated towards an oil inlet of the variable-amplitude reversing valve in a one-way mode, an end cover of the variable-amplitude reversing valve is provided with a variable-amplitude linkage microswitch, and a variable-amplitude linkage valve core push rod movably arranged on the variable-amplitude reversing valve is configured to control the on-off of the variable-amplitude linkage microswitch;

the winch control unit comprises a winch reversing valve, a first oil inlet of the multi-way valve is connected with an oil inlet of the winch reversing valve, the telescopic reversing valve and the amplitude-variable reversing valve are both arranged on an oil path between the first oil inlet of the multi-way valve and the oil inlet of the winch reversing valve, the telescopic reversing valve and the amplitude-variable reversing valve act together to control the on-off of the one-way conduction of the first oil inlet of the multi-way valve towards the oil inlet of the winch reversing valve, a winch unit microswitch is arranged on an end cover of the winch reversing valve, and a winch unit valve core push rod movably arranged on the winch reversing valve is configured to control the on-off of the winch unit microswitch;

the first oil inlet union is arranged between a first oil inlet of the multi-way valve and an oil return opening of the multi-way valve, and the first oil inlet union is configured to control the on-off of an oil path between the first oil inlet of the multi-way valve and the oil return opening of the multi-way valve.

In some embodiments, the first oil inlet pair comprises a solenoid directional valve and a first overflow valve, an oil inlet of the first overflow valve is connected with a first oil inlet of the multi-way valve, a pilot cavity of the first overflow valve is connected with an oil inlet of the solenoid directional valve and is communicated with the oil inlet of the solenoid directional valve in a one-way mode through the pilot cavity of the first overflow valve, and an oil outlet of the first overflow valve and an oil outlet of the solenoid directional valve are both connected with an oil return port of the multi-way valve;

the electromagnetic directional valve comprises a first station and a second station; when the electromagnetic reversing valve is positioned at a first station, an oil inlet of the electromagnetic reversing valve is communicated with an oil return port of the multi-way valve, an oil inlet of a first overflow valve is communicated with an oil outlet of the first overflow valve, and a first oil inlet of the multi-way valve forms an unloading oil path to the oil return port of the multi-way valve through the first overflow valve; when the electromagnetic reversing valve is positioned at the second station, the oil inlet of the electromagnetic reversing valve is disconnected with the oil outlet of the electromagnetic reversing valve.

In some embodiments, the multi-way valve further comprises a rotary control union and a second oil inlet union;

the rotary control joint comprises a rotary control valve, and a second oil inlet of the multi-way valve is communicated towards an oil inlet of the rotary control valve in a one-way mode;

the second oil inlet union is arranged between a second oil inlet of the multi-way valve and an oil return opening of the multi-way valve, and the second oil inlet union is configured to control the on-off of an oil path between the second oil inlet of the multi-way valve and the oil return opening of the multi-way valve.

In some embodiments, the first oil inlet pair comprises an electromagnetic directional valve and a first overflow valve, an oil inlet of the first overflow valve is connected with a first oil inlet of the multi-way valve, a pilot cavity of the first overflow valve is connected with an oil inlet of the electromagnetic directional valve and is communicated with the oil inlet of the electromagnetic directional valve in a one-way mode from the pilot cavity of the first overflow valve, and an oil outlet of the first overflow valve and an oil outlet of the electromagnetic directional valve are both connected with an oil return port of the multi-way valve;

the second oil inlet joint comprises a second overflow valve, an oil inlet of the second overflow valve is connected with a second oil inlet of the multi-way valve, a pilot cavity of the second overflow valve is connected with an oil inlet of the electromagnetic directional valve and is communicated in a one-way mode from the pilot cavity of the second overflow valve to the oil inlet of the electromagnetic directional valve, and an oil outlet of the second overflow valve is connected with an oil return port of the multi-way valve;

the electromagnetic directional valve comprises a first station and a second station; when the electromagnetic reversing valve is positioned at a first station, an oil inlet of the electromagnetic reversing valve is communicated with an oil return port of the multi-way valve, at the moment, an oil inlet of a first overflow valve is communicated with an oil outlet of the first overflow valve, an oil inlet of a second overflow valve is communicated with an oil outlet of the second overflow valve, a first oil inlet of the multi-way valve forms an unloading oil way to the oil return port of the multi-way valve through the first overflow valve, and a second oil inlet of the multi-way valve sequentially forms an unloading oil way to the oil return port of the multi-way valve through the second overflow valve and the electromagnetic reversing valve; when the electromagnetic reversing valve is positioned at the second station, the oil inlet of the electromagnetic reversing valve is disconnected with the oil outlet of the electromagnetic reversing valve.

In some embodiments, the multi-way valve further comprises an oil return line, and the oil return line comprises a fifth one-way valve and a third overflow valve;

an oil inlet of the fifth one-way valve is connected with a second oil inlet of the multi-way valve, an oil outlet of the fifth one-way valve is connected with an oil inlet of the winch reversing valve, the rotary control valve is arranged on an oil path between the oil inlet of the fifth one-way valve and the second oil inlet of the multi-way valve and is configured to control the on-off of the second oil inlet of the multi-way valve and the oil inlet of the fifth one-way valve;

and an oil inlet of the third overflow valve is connected to an oil path between an oil inlet of the fifth one-way valve and the second oil inlet of the multi-way valve, and an oil outlet of the third overflow valve is connected with an oil return port of the multi-way valve.

In some embodiments, the telescoping joint spool push rod, the luffing joint spool push rod and the hoisting joint spool push rod each comprise a groove surface and a non-groove surface;

when the roller of the telescopic joint micro switch is in contact with the non-groove surface of the telescopic joint valve core push rod, the telescopic joint micro switch is turned on, and when the roller of the telescopic joint micro switch is in contact with the groove surface of the telescopic joint valve core push rod, the telescopic joint micro switch is turned off;

when the roller of the amplitude-variable linkage microswitch is in contact with the non-groove surface of the amplitude-variable linkage valve core push rod, the amplitude-variable linkage microswitch is started, and when the roller of the amplitude-variable linkage microswitch is in contact with the groove surface of the amplitude-variable linkage valve core push rod, the amplitude-variable linkage microswitch is closed;

when the roller of the winch connection microswitch is in contact with the non-groove surface of the winch connection valve core push rod, the winch connection microswitch is started, and when the roller of the winch connection microswitch is in contact with the groove surface of the winch connection valve core push rod, the winch connection microswitch is closed.

In some embodiments, the telescoping directional valve comprises an up position, a neutral position, and a down position; the telescopic reversing valve is positioned at a middle position, an oil inlet of the telescopic reversing valve, a first working oil port of the telescopic reversing valve, a second working oil port of the telescopic reversing valve and an oil return port of the telescopic reversing valve are all in a disconnected state, and a middle path oil way of the telescopic reversing valve is in a connected state; the telescopic reversing valve is positioned at an upper position, an oil inlet of the telescopic reversing valve is in a conduction state with a first working oil port of the telescopic reversing valve, a second working oil port of the telescopic reversing valve is in a conduction state with an oil return port of the telescopic reversing valve, and a middle path oil path of the telescopic reversing valve is in a disconnection state; the telescopic reversing valve is in a lower position, an oil inlet of the telescopic reversing valve and a second working oil port of the telescopic reversing valve are in a conduction state, a first working oil port of the telescopic reversing valve and an oil return port of the telescopic reversing valve are in a conduction state, and a middle path oil path of the telescopic reversing valve is in a disconnection state; a first working oil port of the telescopic reversing valve is communicated with an oil port A1 of the multi-way valve, a second working oil port of the telescopic reversing valve is communicated with an oil port B1 of the multi-way valve, and an oil return port of the telescopic reversing valve is communicated with an oil return port of the multi-way valve;

the amplitude-variable reversing valve comprises an upper position, a middle position and a lower position; the variable-amplitude reversing valve is positioned at a middle position, an oil inlet of the variable-amplitude reversing valve, a first working oil port of the variable-amplitude reversing valve, a second working oil port of the variable-amplitude reversing valve and an oil return port of the variable-amplitude reversing valve are all in a disconnected state, and a middle oil way of the variable-amplitude reversing valve is in a connected state; the variable-amplitude reversing valve is positioned at an upper position, an oil inlet of the variable-amplitude reversing valve is in a conduction state with a first working oil port of the variable-amplitude reversing valve, a second working oil port of the variable-amplitude reversing valve is in a conduction state with an oil return port of the variable-amplitude reversing valve, and a middle oil way of the variable-amplitude reversing valve is in a disconnection state; the variable-amplitude reversing valve is positioned at the lower position, an oil inlet of the variable-amplitude reversing valve is in a conduction state with a second working oil port of the variable-amplitude reversing valve, a first working oil port of the variable-amplitude reversing valve is in a conduction state with an oil return port of the variable-amplitude reversing valve, and a middle oil way of the variable-amplitude reversing valve is in a disconnection state; a first working oil port of the variable-amplitude reversing valve is communicated with an A2 oil port of the multi-way valve, a second working oil port of the variable-amplitude reversing valve is communicated with a B2 oil port of the multi-way valve, and an oil return port of the variable-amplitude reversing valve is communicated with an oil return port of the multi-way valve;

the winch reversing valve comprises an upper position, a middle position and a lower position; the winch reversing valve is positioned at the middle position, a first working oil port of the winch reversing valve, a second working oil port of the winch reversing valve and an oil return port of the winch reversing valve are both in a conduction state, and a middle oil way of the winch reversing valve is in a conduction state; the winch reversing valve is positioned at the upper position, an oil inlet of the winch reversing valve and a first working oil port of the winch reversing valve are in a conduction state, a second working oil port of the winch reversing valve and an oil return port of the winch reversing valve are in a conduction state, and a middle oil path of the winch reversing valve is in a disconnection state; the winch reversing valve is positioned at the lower position, an oil inlet of the winch reversing valve and a second working oil port of the winch reversing valve are in a conduction state, a first working oil port of the winch reversing valve and an oil return port of the winch reversing valve are in a conduction state, and a middle path oil path of the winch reversing valve is in a disconnection state; a first working oil port of the winch reversing valve is communicated with an oil port A3 of the multi-way valve, a second working oil port of the winch reversing valve is communicated with an oil port B3 of the multi-way valve, and an oil return port of the winch reversing valve is communicated with an oil return port of the multi-way valve;

the middle oil way of the telescopic reversing valve, the middle oil way of the variable-amplitude reversing valve and the middle oil way of the winch reversing valve are all arranged on an oil way between a first oil inlet of the multi-way valve and an oil return port of the multi-way valve, the middle oil way of the telescopic reversing valve and the middle oil way of the variable-amplitude reversing valve are all in a conduction state, and a first oil inlet of the multi-way valve is conducted with an oil inlet of the winch reversing valve.

The invention also provides a torque integrated control system, which comprises the multi-way valve with the microswitch, wherein a first oil inlet of the multi-way valve is connected with an oil supply system, and an oil return port of the multi-way valve is connected with an oil tank; the oil port A1 of the multi-way valve is connected with a rod cavity of the telescopic oil cylinder, and the oil port B1 of the multi-way valve is connected with a rodless cavity of the telescopic oil cylinder; the A2 oil port of the multi-way valve is connected with the rod cavity of the variable amplitude oil cylinder, and the B2 oil port of the multi-way valve is connected with the rodless cavity of the variable amplitude oil cylinder; the oil port A3 of the multi-way valve is connected with a falling cavity of the hoisting mechanism, and the oil port B3 of the multi-way valve is connected with a lifting cavity of the hoisting mechanism;

when the telescopic reversing valve is in a lower position, the telescopic linkage micro switch is configured to be opened; when the amplitude-variable reversing valve is positioned at an upper position, the control amplitude-variable linkage microswitch is configured to be started; when the winch reversing valve is in the lower position, the winch connection microswitch is configured to be started.

In some embodiments, the multi-way valve further comprises an oil return joint, a rotary control joint and a second oil inlet joint;

the rotary control valve comprises an upper position, a middle position and a lower position; the rotary control valve is positioned at a middle position, a first working oil port of the rotary control valve, a second working oil port of the rotary control valve and an oil return port of the rotary control valve are in a conduction state, and a middle path oil way of the rotary control valve is in a conduction state; the rotary control valve is positioned at an upper position, an oil inlet of the rotary control valve and a first working oil port of the rotary control valve are in a conducting state, a second working oil port of the rotary control valve and an oil return port of the rotary control valve are in a conducting state, and a middle oil way of the rotary control valve is in a disconnecting state; the rotary control valve is in a lower position, an oil inlet of the rotary control valve and a second working oil port of the rotary control valve are in a conducting state, a first working oil port of the rotary control valve and an oil return port of the rotary control valve are in a conducting state, and a middle path oil path of the rotary control valve is in a disconnected state; a first working oil port of the rotary control valve is communicated with an A4 oil port of the multi-way valve, a second working oil port of the rotary control valve is communicated with a B4 oil port of the multi-way valve, and an oil return port of the rotary control valve is communicated with an oil return port of the multi-way valve; the A4 oil port of the multi-way valve is communicated with the forward rotation cavity of the swing mechanism, and the B4 oil port of the multi-way valve is communicated with the reverse rotation cavity of the swing mechanism;

the oil return unit comprises a fifth one-way valve and a third overflow valve;

an oil inlet of the fifth one-way valve is connected with a second oil inlet of the multi-way valve, an oil outlet of the fifth one-way valve is connected with an oil inlet of the winch reversing valve, the rotary control valve is arranged on an oil path between the oil inlet of the fifth one-way valve and the second oil inlet of the multi-way valve, and a middle-way oil path of the rotary control valve is configured to control the on-off of the second oil inlet of the multi-way valve and the oil inlet of the fifth one-way valve;

an oil inlet of the third overflow valve is connected to an oil path between an oil inlet of the fifth one-way valve and a second oil inlet of the multi-way valve, and an oil outlet of the third overflow valve is connected with an oil return port of the multi-way valve;

In some embodiments, the oil supply system comprises a duplex pump, an oil outlet of a large hydraulic pump of the duplex pump is connected with a first oil inlet of the multi-way valve, and an oil outlet of a small hydraulic pump of the duplex pump is connected with a second oil inlet of the multi-way valve.

The invention has the beneficial effects that: (1) In order to realize the moment limiting function of the lorry-mounted crane, the micro switches are respectively arranged at the end covers of the telescopic control link, the amplitude control link and the winch control link of the multi-way valve, and the moment control system is matched with the electromagnetic directional valve in the multi-way valve to lose power through the mutual matching of the micro switches and the valve core push rod, so that the lorry-mounted crane has the moment limiting function in the working processes of telescopic extension, amplitude drop and winch lift, and the integration of the moment limiting function is realized.

(2) When the hoisting mechanism acts, the first oil inlet and the second oil inlet of the multi-way valve are subjected to confluence oil supply, and if the hoisting moment of the hoisting mechanism exceeds the limit, oil liquid of the first oil inlet and the second oil inlet of the multi-way valve is unloaded simultaneously, so that the confluence unloading function of the hoisting mechanism is realized.

(3) The torque control system not only aims at the limitation of the telescopic extension, amplitude variation falling and winding up directions, but also can integrate a micro switch in the telescopic extension, amplitude variation rising, winding falling or rotation action directions according to the use requirement, thereby realizing the limitation of other actions.

Drawings

FIG. 1 is a hydraulic schematic of the multiple-way valve of the present invention;

FIG. 2 is a schematic view of a multi-way valve according to the present invention;

FIG. 3 isbase:Sub>A sectional view of the multi-way valve expansion control unit A-A of the present invention;

FIG. 4 is a sectional view of the variable amplitude control block B-B of the multi-way valve of the present invention;

FIG. 5 is a C-C sectional view of the multi-way valve winch control assembly of the present invention;

FIG. 6 is a hydraulic schematic of the torque integrated control system of the present invention;

in the figure, 0, a multi-way valve, 1, a first oil inlet joint, 11, a first one-way valve, 12, an electromagnetic directional valve, 13, a first overflow valve, 2, a telescopic control joint, 21, a second one-way valve, 22, a telescopic directional valve, 23, a telescopic joint microswitch, 24, a telescopic joint spool push rod, 25, a telescopic joint microswitch connecting plate, 3, a variable amplitude control joint, 31, a third one-way valve, 32, a variable amplitude directional valve, 33, a variable amplitude joint microswitch, 34, a variable amplitude joint spool push rod, 35, a variable amplitude joint microswitch connecting plate, 4, a winch control joint, 41, a fourth one-way valve, 42, a winch directional valve, 43, a winch joint microswitch, 44, a winch joint spool push rod, 45, a winch joint microswitch connecting plate, 5, an oil return joint, 51, a fifth one-way valve, 52, a third overflow valve, 6, a rotary control joint, 61, a rotary control valve, 62, a sixth one-way valve, 7, a second oil inlet joint, 71, a second one-way valve, 72, a seventh one-way valve, 8, 9, a telescopic oil cylinder, 10, a small hydraulic pump, a rotary mechanism, a small oil cylinder, a small swing mechanism and a swing mechanism.

Detailed Description

The invention is further illustrated below with reference to the figures and examples.

As shown in fig. 1 to 6, a multi-way valve with a microswitch, wherein the multi-way valve 0 comprises a first oil inlet joint 1, a telescopic control joint 2, a variable amplitude control joint 3 and a winch control joint 4.

As shown in fig. 1 and fig. 3, the telescopic control unit 2 includes a second check valve 21 and a telescopic reversing valve 22, a first oil inlet P1 of the multi-way valve 0 is connected to an oil inlet F4 of the telescopic reversing valve 22 through the second check valve 21, the first oil inlet P1 of the multi-way valve 0 is connected to an oil inlet of the second check valve 21, and an oil outlet of the second check valve 21 is connected to an oil inlet F4 of the telescopic reversing valve 22. An end cover of the telescopic reversing valve 22 is provided with a telescopic micro switch 23 through a telescopic micro switch connecting plate 25, and a telescopic valve core push rod 24 movably arranged on the telescopic reversing valve 22 is configured to control the opening and closing of the telescopic micro switch 23. Specifically, the telescopic joint spool push rod 24 is connected with a spool movably arranged in the telescopic reversing valve 22, the spool can drive the telescopic joint spool push rod 24 to move when moving in the telescopic reversing valve 22, and the telescopic joint micro switch 23 can be triggered by the movement of the telescopic joint spool push rod 24 to control the telescopic joint micro switch 23 to be turned on or turned off.

The matching form between the telescopic joint spool push rod 24 and the telescopic joint micro switch 23 can be selected in various ways.

In some embodiments, the telescoping spool push rod 24 is structurally configured to include a grooved face and a non-grooved face. When the telescopic joint spool push rod 24 moves along with the spool of the telescopic reversing valve 22 so that the roller of the telescopic joint micro switch 23 is in contact with the non-groove surface of the telescopic joint spool push rod 24, the telescopic joint micro switch 23 is turned on. When the roller of the telescopic joint micro switch 23 is contacted with the groove surface of the telescopic joint spool push rod 24 after the telescopic joint spool push rod 24 moves, the telescopic joint micro switch 23 is closed.

As shown in fig. 1 and 4, the variable amplitude control unit 3 includes a third check valve 31 and a variable amplitude reversing valve 32, a first oil inlet P1 of the multi-way valve 0 is connected to an oil inlet G4 of the variable amplitude reversing valve 32 through the third check valve 31, the first oil inlet P1 of the multi-way valve 0 is connected to an oil inlet of the third check valve 31, and an oil outlet of the third check valve 31 is connected to an oil inlet G4 of the variable amplitude reversing valve 32. An end cover of the amplitude-variable reversing valve 32 is provided with an amplitude-variable micro switch 33 through an amplitude-variable micro switch connecting plate 35, and an amplitude-variable valve core push rod 34 movably arranged on the amplitude-variable reversing valve 32 is configured to control the on-off of the amplitude-variable micro switch 33. Specifically, the amplitude-variable valve core push rod 34 is connected with a valve core movably arranged in the amplitude-variable reversing valve 32, the valve core can drive the amplitude-variable valve core push rod 34 to move when moving in the amplitude-variable reversing valve 32, and the amplitude-variable valve core push rod 34 can trigger the control amplitude-variable microswitch 33 and control the amplitude-variable microswitch 33 to be turned on or turned off.

The structure of the amplitude-variable valve core connecting push rod 34 is arranged with the telescopic valve core connecting push rod 24, and a groove surface and a non-groove surface are arranged on the amplitude-variable valve core connecting push rod 34. When the amplitude-variable linkage valve core push rod 34 moves along with the valve core of the amplitude-variable reversing valve 32 so that the roller of the amplitude-variable linkage microswitch 33 is in contact with the non-groove surface of the amplitude-variable linkage valve core push rod 34, the amplitude-variable linkage microswitch 33 is started. When the roller of the amplitude-variable linkage microswitch 33 is contacted with the groove surface of the amplitude-variable linkage valve core push rod 34 after the amplitude-variable linkage valve core push rod 34 moves, the amplitude-variable linkage microswitch 33 is closed.

As shown in fig. 1 and 5, the winch control unit 4 includes a fourth check valve 41 and a winch reversing valve 42, a first oil inlet P1 of the multi-way valve 0 is connected to an oil inlet H4 of the winch reversing valve 42 through the fourth check valve 41, a first oil inlet P1 of the multi-way valve 0 is connected to an oil inlet of the fourth check valve 41, and an oil outlet of the fourth check valve 41 is connected to an oil inlet H4 of the winch reversing valve 42. The telescopic reversing valve 22 and the variable amplitude reversing valve 32 are both arranged on an oil path between the first oil inlet of the multi-way valve 0 and the oil inlet of the winch reversing valve 42, and the telescopic reversing valve 22 and the variable amplitude reversing valve 32 act together to control the one-way conduction of the first oil inlet of the multi-way valve 0 towards the oil inlet of the winch reversing valve 42. A winch connection microswitch 43 is arranged on an end cover of the winch reversing valve 42 through a winch connection microswitch connecting plate 45, and a winch connection valve core push rod 44 movably arranged on the winch reversing valve 42 is configured to control the on-off of the winch connection microswitch 43. Specifically, the hoisting linkage valve core push rod 44 is connected with a valve core movably arranged in the hoisting reversing valve 42, the movement of the valve core in the hoisting reversing valve 42 can drive the hoisting linkage valve core push rod 44 to move, the movement of the hoisting linkage valve core push rod 44 can trigger and control the hoisting linkage microswitch 43, and the control of the hoisting linkage microswitch 43 is started or closed.

The structure of the winch valve core connecting push rod 44 is arranged with the telescopic valve core connecting push rod 24, and a groove surface and a non-groove surface are arranged on the winch valve core connecting push rod 44. When the winch joint spool push rod 44 moves along with the spool of the winch joint spool reversing valve 42, so that the roller of the winch joint microswitch 43 is in contact with the non-groove surface of the winch joint spool push rod 44, the winch joint microswitch 43 is turned on. When the roller of the hoisting joint microswitch 43 contacts with the groove surface of the hoisting joint spool push rod 44 after the hoisting joint spool push rod 44 moves, the hoisting joint microswitch 43 is closed.

And micro switches are arranged on end covers of the multi-way valve telescopic control unit 2, the variable amplitude control unit 3 and the winch control unit 4, and the valve cores of the units move to drive the valve core push rods to open and close the micro switches. When the microswitch is started, the torque system starts a torque limit identification function; when the micro switch is turned off, the torque system turns off the torque limit identification function.

As shown in fig. 1, the first oil inlet pair 1 is disposed between a first oil inlet P1 of the multi-way valve 0 and an oil return port T of the multi-way valve 0, and the first oil inlet pair 1 is configured to control on/off of an oil path between the first oil inlet P1 of the multi-way valve 0 and the oil return port T of the multi-way valve 0. Specifically, when the first oil inlet union 1 controls the first oil inlet P1 of the multi-way valve 0 to be in a conducting state with the oil return port T of the multi-way valve 0, that is, the first oil inlet union 1 controls the first oil inlet P1 of the multi-way valve 0 to form an unloading oil path with the oil return port T of the multi-way valve 0 through the first oil inlet union 1, pressure cannot be built inside the multi-way valve 0, that is, the telescopic control union 2, the variable amplitude control union 3 and the winch control union 4 cannot obtain hydraulic oil from the first oil inlet P1 of the multi-way valve 0 to perform normal operation. When the first oil inlet joint 1 controls the first oil inlet P1 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 to be in a disconnected state (including a disconnected state with pressure limitation, that is, when the pressure at the first oil inlet P1 of the multi-way valve 0 does not exceed a certain value, the first oil inlet P1 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 are also in a disconnected state, and when the pressure at the first oil inlet P1 of the multi-way valve 0 exceeds a certain value, the first oil inlet P1 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 are in a connected state), at this time, pressure can be built inside the multi-way valve 0, that is, the telescopic control joint 2, the variable amplitude control joint 3 and the winch control joint 4 can obtain hydraulic oil from the first oil inlet P1 of the multi-way valve 0 to perform normal operation.

The control form of the first oil feeding combination 1 which can achieve the above purpose can be selected in various ways.

In some embodiments, as shown in fig. 1, the first oil inlet connection 1 includes a first check valve 11, a solenoid directional valve 12, and a first overflow valve 13. An oil inlet P3 of the first overflow valve 13 is connected with a first oil inlet P1 of the multi-way valve 0, a pilot cavity J1 of the first overflow valve 13 is connected with an oil inlet P4 of the electromagnetic directional valve 12 and is connected with the oil inlet P4 of the electromagnetic directional valve 12 through the first check valve 11 by the pilot cavity J1 of the first overflow valve 13, the pilot cavity J1 of the first overflow valve 13 is connected with the oil inlet of the first check valve 11, and the oil outlet of the first check valve 11 is connected with the oil inlet P4 of the electromagnetic directional valve 12. An oil outlet T3 of the first overflow valve 13 and an oil outlet T4 of the electromagnetic directional valve 12 are both connected with an oil return port T of the multi-way valve 0.

The electromagnetic directional valve 12 comprises a first station and a second station; when the electromagnetic directional valve 12 is in the first station when power is lost, the oil inlet P4 of the electromagnetic directional valve 12 is communicated with the oil return port T of the multi-way valve 0, at this time, the first overflow valve 13 is not pressurized or has extremely low pressure limitation, so that the first oil inlet P1 of the multi-way valve 0 forms an unloading oil path to the oil return port T of the multi-way valve 0 through the first overflow valve 13, and the multi-way valve 0 cannot build pressure or cannot build enough pressure so that the telescopic control union 2, the variable amplitude control union 3 and the winch control union 4 can obtain hydraulic oil from the first oil inlet P1 of the multi-way valve 0 to normally operate. When the electromagnetic directional valve 12 is powered on and is positioned at the second station, the oil inlet P4 of the electromagnetic directional valve 12 is disconnected with the oil outlet T4 of the electromagnetic directional valve 12, and at the moment, the first overflow valve 13 works normally to play a role in regulating pressure and protect a hydraulic system; the multi-way valve 0 normally builds pressure to work, and the telescopic control union 2, the variable amplitude control union 3 and the winch control union 4 can obtain hydraulic oil from a first oil inlet P1 of the multi-way valve 0 so as to normally work.

In some embodiments, the telescoping directional valve 22, the luffing directional valve 32, and the winching directional valve 42 are all three-position, six-way directional valves.

As shown in fig. 1 and 6, the telescoping directional valve 22 includes an up position, a neutral position, and a down position. The telescopic reversing valve 22 is in a middle position, an oil inlet F4 of the telescopic reversing valve 22, a first working oil port F3 of the telescopic reversing valve 22, a second working oil port F2 of the telescopic reversing valve 22 and an oil return port F1 of the telescopic reversing valve 22 are all in a disconnected state, and a middle oil path of the telescopic reversing valve 22 is in a connected state. The telescopic reversing valve 22 is in an upper position, an oil inlet F4 of the telescopic reversing valve 22 and a first working oil port F3 of the telescopic reversing valve 22 are in a conducting state, a second working oil port F2 of the telescopic reversing valve 22 and an oil return port F1 of the telescopic reversing valve 22 are in a conducting state, and a middle oil way of the telescopic reversing valve 22 is in a disconnecting state. The telescopic reversing valve 22 is in a lower position, an oil inlet F4 of the telescopic reversing valve 22 and a second working oil port F2 of the telescopic reversing valve 22 are in a conducting state, a first working oil port F3 of the telescopic reversing valve 22 and an oil return port F1 of the telescopic reversing valve 22 are in a conducting state, and a middle oil way of the telescopic reversing valve 22 is in a disconnected state. The first working oil port F3 of the telescopic reversing valve 22 is communicated with the oil port A1 of the multi-way valve 0, the second working oil port F2 of the telescopic reversing valve 22 is communicated with the oil port B1 of the multi-way valve 0, and the oil return port F1 of the telescopic reversing valve 22 is communicated with the oil return port T of the multi-way valve 0.

The amplitude-variable reversing valve 32 comprises an upper position, a middle position and a lower position. The variable amplitude reversing valve 32 is in a middle position, the oil inlet G4 of the variable amplitude reversing valve 32, the first working oil port G3 of the variable amplitude reversing valve 32, the second working oil port G2 of the variable amplitude reversing valve 32 and the oil return port G1 of the variable amplitude reversing valve 32 are all in a disconnected state, and a middle oil way of the variable amplitude reversing valve 32 is in a connected state. The variable amplitude reversing valve 32 is in an upper position, the oil inlet G4 of the variable amplitude reversing valve 32 is in a conducting state with the first working oil port G3 of the variable amplitude reversing valve 32, the second working oil port G2 of the variable amplitude reversing valve 32 is in a conducting state with the oil return port G1 of the variable amplitude reversing valve 32, and the middle oil way of the variable amplitude reversing valve 32 is in a disconnected state. The variable amplitude reversing valve 32 is in a lower position, the oil inlet G4 of the variable amplitude reversing valve 32 and the second working oil port G2 of the variable amplitude reversing valve 32 are in a conducting state, the first working oil port G3 of the variable amplitude reversing valve 32 and the oil return port G1 of the variable amplitude reversing valve 32 are in a conducting state, and the middle oil way of the variable amplitude reversing valve 32 is in a disconnected state. The first working oil port G3 of the variable-amplitude reversing valve 32 is communicated with the oil port A2 of the multi-way valve 0, the second working oil port G2 of the variable-amplitude reversing valve 32 is communicated with the oil port B2 of the multi-way valve 0, and the oil return port G1 of the variable-amplitude reversing valve 32 is communicated with the oil return port T of the multi-way valve 0.

The winching reversing valve 42 comprises an upper position, a middle position and a lower position. The winch reversing valve 42 is located at the middle position, the first working oil port H3 of the winch reversing valve 42, the second working oil port H2 of the winch reversing valve 42 and the oil return port H1 of the winch reversing valve 42 are all in a conduction state, and the middle path oil path of the winch reversing valve 42 is in a conduction state. The winch reversing valve 42 is in an upper position, the oil inlet H4 of the winch reversing valve 42 and the first working oil port H3 of the winch reversing valve 42 are in a conducting state, the second working oil port H2 of the winch reversing valve 42 and the oil return port H1 of the winch reversing valve 42 are in a conducting state, and the middle oil path of the winch reversing valve 42 is in a disconnected state. The winch reversing valve 42 is in the lower position, the oil inlet H4 of the winch reversing valve 42 and the second working oil port H2 of the winch reversing valve 42 are in a conducting state, the first working oil port H3 of the winch reversing valve 42 and the oil return port H1 of the winch reversing valve 42 are in a conducting state, and a middle oil path of the winch reversing valve 42 is in a disconnected state. The first working oil port H3 of the winch reversing valve 42 is communicated with the oil port A3 of the multi-way valve 0, the second working oil port H2 of the winch reversing valve 42 is communicated with the oil port B3 of the multi-way valve 0, and the oil return port H1 of the winch reversing valve 42 is communicated with the oil return port T of the multi-way valve 0.

As shown in fig. 1, a first oil inlet P1 of the multi-way valve 0 sequentially passes through a middle oil path of the telescopic reversing valve 22 and a middle oil path of the variable amplitude reversing valve 32 and then is respectively connected with an oil inlet H4 of the winch reversing valve 42 and a middle oil path of the winch reversing valve 42; the middle oil path of the hoisting reversing valve 42 is also connected with the oil return port T of the multi-way valve 0. The middle oil path of the telescopic reversing valve 22 and the middle oil path of the variable amplitude reversing valve 32 are both in a conducting state, that is, when the telescopic reversing valve 22 and the variable amplitude reversing valve 32 are both in the middle positions, the first oil inlet P1 of the multi-way valve 0 is only conducted with the oil inlet H4 of the winch reversing valve 42.

As shown in fig. 1 and 2, in some embodiments, the multi-way valve 0 further includes a rotary control unit 6 and a second oil inlet unit 7.

The rotation control unit 6 comprises a rotation control valve 61 and a sixth one-way valve 62, a second oil inlet P2 of the multi-way valve 0 is connected with an oil inlet I3 of the rotation control valve 61 through the sixth one-way valve 62, the second oil inlet P2 of the multi-way valve 0 is connected with an oil inlet of the sixth one-way valve 62, and an oil outlet of the sixth one-way valve 62 is connected with the oil inlet I3 of the rotation control valve 61.

The rotary control valve 61 is a three-position six-way reversing valve which comprises an upper position, a middle position and a lower position; the rotary control valve 61 is in a neutral position, the first working oil port I4 of the rotary control valve 61, the second working oil port I1 of the rotary control valve 61 and the oil return port I2 of the rotary control valve 61 are all in a conducting state, and the middle oil path of the rotary control valve 61 is in a conducting state. The rotary control valve 61 is at an upper position, the oil inlet I3 of the rotary control valve 61 and the first working oil port I4 of the rotary control valve 61 are in a conducting state, the second working oil port I1 of the rotary control valve 61 and the oil return port I2 of the rotary control valve 61 are in a conducting state, and the middle oil path of the rotary control valve 61 is in a disconnecting state. The rotary control valve 61 is in the lower position, the oil inlet I3 of the rotary control valve 61 and the second working oil port I1 of the rotary control valve 61 are in a conducting state, the first working oil port I4 of the rotary control valve 61 and the oil return port I2 of the rotary control valve 61 are in a conducting state, and the middle oil path of the rotary control valve 61 is in a disconnected state. The first working oil port I4 of the rotary control valve 61 is communicated with the oil port A4 of the multi-way valve 0, the second working oil port I1 of the rotary control valve 61 is communicated with the oil port B4 of the multi-way valve 0, and the oil return port I2 of the rotary control valve 61 is communicated with the oil return port T of the multi-way valve 0. The A4 oil port of the multi-way valve 0 is communicated with the forward rotation cavity of the swing mechanism 100, and the B4 oil port of the multi-way valve 0 is communicated with the reverse rotation cavity of the swing mechanism 100.

The second oil inlet union 7 is arranged between the second oil inlet P2 of the multi-way valve 0 and the oil return port T of the multi-way valve 0, and the second oil inlet union 7 is configured to control the on-off of an oil path between the second oil inlet P2 of the multi-way valve 0 and the oil return port T of the multi-way valve 0. Specifically, when the second oil inlet union 7 controls the second oil inlet P2 of the multi-way valve 0 to be in a conducting state with the oil return port T of the multi-way valve 0, that is, the second oil inlet union 7 controls the second oil inlet P2 of the multi-way valve 0 to form an unloading oil path with the oil return port T of the multi-way valve 0 through the second oil inlet union 7, and pressure cannot be built inside the multi-way valve 0, that is, the rotary control union 6 cannot obtain hydraulic oil from the second oil inlet P2 of the multi-way valve 0 to perform normal operation. When the second oil inlet coupler 7 controls the second oil inlet P2 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 to be in a disconnected state (including a disconnected state with pressure limitation, that is, when the pressure at the second oil inlet P2 of the multi-way valve 0 does not exceed a certain value, the second oil inlet P2 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 are also in a disconnected state, and when the pressure at the second oil inlet P2 of the multi-way valve 0 exceeds a certain value, the second oil inlet P2 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 are in a connected state), at this time, pressure can be built inside the multi-way valve 0, that is, the rotary control coupler 6 can obtain hydraulic oil from the first oil inlet P1 of the multi-way valve 0 to perform normal operation.

The control principle of the second oil inlet union 7 is the same as that of the first oil inlet union 1, and the second oil inlet union 7 and the first oil inlet union 1 share the electromagnetic directional valve 12.

In some embodiments, as shown in fig. 1, the second inlet manifold 7 includes a second relief valve 71 and a seventh check valve 72. An oil inlet P6 of the second overflow valve 71 is connected with a second oil inlet P2 of the multi-way valve 0, a pilot cavity J2 of the second overflow valve 71 is connected with an oil inlet P4 of the electromagnetic directional valve 12 and is connected with the oil inlet P4 of the electromagnetic directional valve 12 through a seventh one-way valve 72 by the pilot cavity J2 of the second overflow valve 71, the pilot cavity J2 of the overflow valve 71 is connected with an oil inlet of the seventh one-way valve 72, and an oil outlet of the seventh one-way valve 72 is connected with the oil inlet P4 of the electromagnetic directional valve 12 sequentially through an external control port K2 and an external control port K1 of the multi-way valve 0; an oil outlet T6 of the second overflow valve 71 is connected with an oil return port T of the multi-way valve 0.

In some embodiments, the multi-way valve 0 further includes an oil return connection 5, and the oil return connection 5 includes a fifth check valve 51 and a third overflow valve 52.

An oil inlet of the fifth one-way valve 51 is connected with the second oil inlet P2 of the multi-way valve 0, an oil outlet of the fifth one-way valve 51 is connected with an oil inlet H4 of the winch reversing valve 42, the rotary control valve 61 is arranged on an oil path between the oil inlet of the fifth one-way valve 51 and the second oil inlet of the multi-way valve 0, and the rotary control valve 61 is configured to control the on-off of the second oil inlet of the multi-way valve 0 and the oil inlet of the fifth one-way valve 51. Specifically, when the rotary control valve 61 is in the neutral position, the second oil inlet P2 of the multi-way valve 0 is communicated with the oil inlet H4 of the hoisting reversing valve 42. The oil return connection 5 is arranged to enable the first oil inlet P1 of the multi-way valve 0 and the second oil inlet P2 of the multi-way valve 0 to be converged and then provide oil for the winch reversing connection 4.

An oil inlet of the third overflow valve 52 is connected to an oil path between an oil inlet of the fifth check valve 51 and the second oil inlet P2 of the multi-way valve 0, and an oil outlet of the third overflow valve 52 is connected to an oil return port T of the multi-way valve 0.

The invention also provides a torque integrated control system, as shown in fig. 1 to 6, comprising the multi-way valve with the microswitch, wherein a first oil inlet P1 of the multi-way valve 0 is connected with an oil supply system, and an oil return port T of the multi-way valve 0 is connected with an oil tank; the A1 oil port of the multi-way valve 0 is connected with the rod cavity of the telescopic oil cylinder 8, and the B1 oil port of the multi-way valve 0 is connected with the rodless cavity of the telescopic oil cylinder 8; the A2 oil port of the multi-way valve 0 is connected with the rod cavity of the variable amplitude oil cylinder 9, and the B2 oil port of the multi-way valve 0 is connected with the rodless cavity of the variable amplitude oil cylinder 9; the oil port A3 of the multi-way valve 0 is connected with the falling cavity of the hoisting mechanism 10, and the oil port B3 of the multi-way valve 0 is connected with the lifting cavity of the hoisting mechanism 10.

When the telescopic reversing valve 22 is in a lower position, the telescopic micro switch 23 is configured to be opened; when the amplitude variation reversing valve 32 is in an upper position, the control amplitude variation linkage microswitch 33 is configured to be opened; when the winding direction switching valve 42 is in the lower position, the winding connection microswitch 43 is configured to be opened.

The working principle of the moment integrated control system is as follows:

the first oil inlet joint 1 comprises a first one-way valve 11, an electromagnetic directional valve 12 and a first overflow valve 13, and a first oil inlet P1 is used for supplying oil to the telescopic control joint 2, the variable amplitude control joint 3 and the winch control joint 4. When the electromagnetic directional valve 12 is powered on, the pilot chamber J1 of the first overflow valve 13 is closed, and the first overflow valve 13 can regulate pressure, so that the multi-way valve 0 normally builds pressure to work. When the electromagnetic directional valve 12 is de-energized, the oil in the pilot chamber J1 of the first overflow valve 13 is connected back to the oil tank through the electromagnetic directional valve 12 via the oil return port T of the multi-way valve 0, at this time, the first oil path is unloaded, and the multi-way valve 0 cannot build pressure.

The electromagnetic directional valve 12 is in an energized state, and an oil inlet P4 of the electromagnetic directional valve 12 to an oil outlet T4 of the electromagnetic directional valve 12 are in a disconnected state. The telescopic reversing valve 22 of the telescopic control unit 2 is operated to the lower position under the suspension working condition, hydraulic oil at the first oil inlet P1 of the multi-way valve 0 reaches an oil inlet F4 of the telescopic reversing valve 22 through the second one-way valve 21 and passes through a second working oil port F2 of the telescopic reversing valve 22 to a B1 oil port of the multi-way valve 0, the oil finally reaches a rodless cavity of the telescopic oil cylinder 8, a piston rod of the telescopic oil cylinder 8 is driven to extend, and the telescopic oil cylinder 8 acts towards the direction of increasing force limit. When the telescopic reversing valve 22 is in the lower position, the valve core of the telescopic reversing valve 22 drives the telescopic linkage valve core push rod 24 to move, so that the roller of the telescopic linkage micro switch 23 is in contact with the non-groove surface of the telescopic linkage valve core push rod 24, the telescopic linkage micro switch 23 is opened, and the force limiting system is started to limit the identification function of the moment. When the calibration value of the force limit system is not reached, the force limit system is identified to be in a safe state, the electromagnetic directional valve 12 is kept electrified, and the telescopic oil cylinder 8 can continue to extend. When the calibration value of the force limiting system is reached, the force limiting system recognizes that the force limiting system is in a dangerous state, the electromagnetic directional valve 12 is changed from power-on to power-off, the oil inlet P4 of the electromagnetic directional valve 12 is communicated with the oil outlet T4 of the electromagnetic directional valve 12, oil in the pilot cavity J1 of the first overflow valve 13 is returned to the oil tank through the electromagnetic directional valve 12 and the oil return port T of the multi-way valve 0, the first overflow valve 13 is opened, the oil inlet P3 of the first overflow valve 13 is communicated with the oil outlet T3 of the first overflow valve 13, the oil on the first oil inlet path is unloaded to the oil tank through the oil inlet P3 of the first overflow valve 13, the oil outlet T3 of the first overflow valve 13 and the oil return port T of the multi-way valve 0 in sequence, and at this time, if the telescopic directional valve 22 is kept to the lower position, the telescopic oil cylinder 8 does not extend out any more. Operating the telescopic reversing valve 22 to an upper position, driving a telescopic joint valve core push rod 24 to move by a valve core of the telescopic reversing valve 22, enabling a roller of a telescopic joint micro switch 23 to return to the groove surface of the telescopic joint valve core push rod 24, closing the telescopic joint micro switch 23, identifying the safety state by a force limit system closing moment limit, changing the electromagnetic reversing valve 12 from power failure to power failure, disconnecting an oil inlet P4 of the electromagnetic reversing valve 12 from an oil outlet T4 of the electromagnetic reversing valve 12, closing a pilot cavity J1 of a first overflow valve 13, disconnecting an oil inlet P3 of the first overflow valve 13 from an oil outlet T3 of the first overflow valve 13 under the condition that the first overflow valve 13 does not reach the set pressure, establishing the pressure by the multi-way valve 0, and removing the force limit state.

The electromagnetic directional valve 12 is in an energized state, and an oil inlet P4 of the electromagnetic directional valve 12 to an oil outlet T4 of the electromagnetic directional valve 12 are in a disconnected state. The amplitude-variable reversing valve 32 of the amplitude-variable control unit 3 is operated to an upper position under a hoisting working condition, hydraulic oil at a first oil inlet P1 of the multi-way valve 0 reaches an oil inlet G4 of the amplitude-variable reversing valve 32 through the third one-way valve 31 and then passes through a first working oil port G3 of the amplitude-variable reversing valve 32 to an oil port A2 of the multi-way valve 0, the oil finally reaches a rod cavity of the amplitude-variable oil cylinder 9, a piston rod of the amplitude-variable oil cylinder 9 retracts, and the amplitude-variable oil cylinder 9 acts towards a direction of increasing the force limit. When the amplitude-variable reversing valve 32 is in the lower position, the valve core of the amplitude-variable reversing valve 32 drives the amplitude-variable valve core push rod 34 to move, the roller of the amplitude-variable microswitch 33 is in contact with the non-groove surface of the amplitude-variable valve core push rod 34, the amplitude-variable microswitch 33 is opened, and the force limit system starts the torque limit identification function. When the calibration value of the force limit system is not reached, the force limit system identifies that the electromagnetic directional valve 12 is in a safe state, the electromagnetic directional valve is kept electrified, and the amplitude-variable oil cylinder 9 can continue to retract. When the calibration value of the force limiting system is reached, the force limiting system identifies that the electromagnetic directional valve 12 is in a dangerous state, the electromagnetic directional valve 12 is changed from power on to power off, an oil inlet P4 of the electromagnetic directional valve 12 is communicated with an oil outlet T4 of the electromagnetic directional valve 12, oil in a pilot cavity J1 of the first overflow valve 13 is connected back to an oil tank through the electromagnetic directional valve 12 and an oil return port T of the multi-way valve 0, the first overflow valve 13 is opened, an oil inlet P3 of the first overflow valve 13 is communicated with an oil outlet T3 of the first overflow valve 13, the oil on the first oil inlet path sequentially passes through the oil inlet P3 of the first overflow valve 13, the oil outlet T3 of the first overflow valve 13 and the oil return port T of the multi-way valve 0 and is unloaded to the oil tank, and if the amplitude-variable directional valve 32 is continuously kept to an upper position at the moment, the amplitude-variable oil cylinder 9 is not retracted any more. The variable amplitude reversing valve 32 is operated to the lower position, the valve core of the variable amplitude reversing valve 32 drives the variable amplitude linkage valve core push rod 34 to move, the roller of the variable amplitude linkage switch 33 returns to the groove surface of the variable amplitude linkage valve core push rod 34, the variable amplitude linkage microswitch 33 is closed, the force limit system closes the torque limit identification function and identifies that the valve is in a safe state, the electromagnetic reversing valve 12 is powered from power failure, the oil inlet P4 of the electromagnetic reversing valve 12 is disconnected from the oil outlet T4 of the electromagnetic reversing valve 12, the pilot cavity J1 of the first overflow valve 13 is closed, under the condition that the first overflow valve 13 does not reach the set pressure, the oil inlet P3 of the first overflow valve 13 is disconnected from the oil outlet T3 of the first overflow valve 13, the multi-way valve 0 can establish the pressure, and the force limit state is released.

The electromagnetic directional valve 12 is in an energized state, and an oil inlet P4 of the electromagnetic directional valve 12 to an oil outlet T4 of the electromagnetic directional valve 12 are in a disconnected state. Under the condition of hoisting, the telescopic reversing valve 22 is controlled to be in the middle position, the amplitude-variable reversing valve 32 is in the middle position, the hoisting reversing valve 42 of the hoisting control unit 4 is controlled to be in the lower position, hydraulic oil at the first oil inlet P1 of the multi-way valve 0 reaches the oil inlet H4 of the hoisting reversing valve 42 through the fourth one-way valve 41 and then reaches the oil port B3 of the multi-way valve 0 through the second working oil port H2 of the hoisting reversing valve 42, the oil finally reaches the lifting cavity of the hoisting mechanism 10, the hoisting mechanism 10 lifts, and the hoisting mechanism 10 moves towards the direction of increasing force limit. When the winch reversing valve 42 is in the lower position, the valve core of the winch reversing valve 42 drives the amplitude-variable valve core push rod 44 to move, the roller of the amplitude-variable micro switch 43 is in contact with the non-groove surface of the amplitude-variable valve core push rod 44, the amplitude-variable micro switch 43 is opened, and the force limiting system starts the torque limiting and identifying function. When the calibration value of the force limit system is not reached, the force limit system is identified to be in a safe state, the electromagnetic directional valve 12 is kept electrified, and the hoisting mechanism 10 can continue to hoist. When the calibration value of the force limit system is reached, the force limit system recognizes that the force limit system is in a dangerous state, the electromagnetic directional valve 12 is changed from power-on to power-off, an oil inlet P4 of the electromagnetic directional valve 12 is communicated with an oil outlet T4 of the electromagnetic directional valve 12, oil in a pilot cavity J1 of the first overflow valve 13 is connected back to the oil tank through the electromagnetic directional valve 12 and an oil return port T of the multi-way valve 0, the first overflow valve 13 is opened, an oil inlet P3 of the first overflow valve 13 is communicated with an oil outlet T3 of the first overflow valve 13, the oil in the first oil inlet channel sequentially passes through the oil inlet P3 of the first overflow valve 13, the oil outlet T3 of the first overflow valve 13 and the oil return port T of the multi-way valve 0 to be unloaded to the oil tank, and at this time, if the hoisting directional valve 42 is continuously kept to the lower position, the hoisting mechanism 10 does not hoist. The winch reversing valve 42 is operated to an upper position, the spool of the winch reversing valve 42 drives the amplitude linkage spool push rod 44 to move, the roller of the amplitude linkage microswitch 43 returns to the groove surface of the amplitude linkage spool push rod 44, the amplitude linkage microswitch 43 is closed, the force limit system closes the torque limit identification function and identifies that the electromagnetic reversing valve 12 is in a safe state, the electromagnetic reversing valve 12 is powered on from power failure, the oil inlet P4 of the electromagnetic reversing valve 12 is disconnected from the oil outlet T4 of the electromagnetic reversing valve 12, the pilot cavity J1 of the first overflow valve 13 is closed, under the condition that the first overflow valve 13 does not reach the set pressure, the oil inlet P3 of the first overflow valve 13 is disconnected from the oil outlet T3 of the first overflow valve 13, the pressure can be established by the multi-way valve 0, and the force limit state is removed.

In some embodiments, the multi-way valve 0 in the torque integrated control system further comprises an oil return connection 5, a rotary control connection 6 and a second oil inlet connection 7; the structural principles of the oil return joint 5, the rotation control joint 6 and the second oil inlet joint 7 are the same as those described above, and are not described herein again.

Under the condition that the multi-way valve 0 is provided with a second oil inlet P2, an oil return joint 5, a rotation control joint 6 and a second oil inlet joint 7, the oil supply system adopts a duplex pump, the oil outlet of a large hydraulic pump L1 of the duplex pump is connected with the first oil inlet P1 of the multi-way valve 0, and the oil outlet of a small hydraulic pump L2 of the duplex pump is connected with the second oil inlet P2 of the multi-way valve 0.

The second oil inlet joint 7 and the first oil inlet joint 1 share the electromagnetic directional valve 12, the second oil inlet P2 of the multi-way valve 0 and the oil return port T of the multi-way valve 0 are controlled by the electromagnetic directional valve 12, and the second oil inlet joint 7 is used for supplying oil to the rotary control joint 6 and the winch control joint 4.

When the hoisting mechanism 10 works, the hydraulic oil at the first oil inlet P1 of the multi-way valve 0 and the hydraulic oil at the second oil inlet P2 of the multi-way valve 0 are converged and supplied to the oil when the hoisting mechanism 10 acts.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A multi-way valve having a micro-switch, characterized by: the multi-way valve (0) comprises a first oil inlet joint (1), a telescopic control joint (2), an amplitude variation control joint (3) and a winch control joint (4);

the telescopic control unit (2) comprises a telescopic reversing valve (22), a first oil inlet of the multi-way valve (0) is communicated towards an oil inlet of the telescopic reversing valve (22) in a one-way mode, a telescopic linkage microswitch (23) is arranged on an end cover of the telescopic reversing valve (22), and a telescopic linkage valve core push rod (24) movably arranged on the telescopic reversing valve (22) is configured to control the opening and closing of the telescopic linkage microswitch (23);

the variable-amplitude control unit (3) comprises a variable-amplitude reversing valve (32), a first oil inlet of the multi-way valve (0) is communicated towards an oil inlet of the variable-amplitude reversing valve (32) in a one-way mode, an end cover of the variable-amplitude reversing valve (32) is provided with a variable-amplitude linkage microswitch (33), and a variable-amplitude linkage valve core push rod (34) movably arranged on the variable-amplitude reversing valve (32) is configured to control the on and off of the variable-amplitude linkage microswitch (33);

the winch control unit (4) comprises a winch reversing valve (42), a first oil inlet of the multi-way valve (0) is connected with an oil inlet of the winch reversing valve (42), the telescopic reversing valve (22) and the amplitude-variable reversing valve (32) are arranged on an oil path between the first oil inlet of the multi-way valve (0) and the oil inlet of the winch reversing valve (42), the telescopic reversing valve (22) and the amplitude-variable reversing valve (32) jointly act to control the on-off of the one-way conduction of the first oil inlet of the multi-way valve (0) towards the oil inlet of the winch reversing valve (42), a winch connection microswitch (43) is arranged on an end cover of the winch reversing valve (42), and a winch connection valve core push rod (44) movably arranged on the winch reversing valve (42) is configured to control the on-off of the winch connection microswitch (43);

the first oil inlet union (1) is arranged between a first oil inlet of the multi-way valve (0) and an oil return opening of the multi-way valve (0), and the first oil inlet union (1) is configured to control the on-off of an oil path between the first oil inlet of the multi-way valve (0) and the oil return opening of the multi-way valve (0).

2. The multiplex valve with microswitch of claim 1, wherein: the first oil inlet joint (1) comprises an electromagnetic directional valve (12) and a first overflow valve (13), an oil inlet of the first overflow valve (13) is connected with a first oil inlet of the multi-way valve (0), a pilot cavity of the first overflow valve (13) is connected with an oil inlet of the electromagnetic directional valve (12) and is communicated in a one-way mode from the pilot cavity of the first overflow valve (13) to the oil inlet of the electromagnetic directional valve (12), and an oil outlet of the first overflow valve (13) and an oil outlet of the electromagnetic directional valve (12) are both connected with an oil return port of the multi-way valve (0);

the electromagnetic directional valve (12) comprises a first station and a second station; when the electromagnetic directional valve (12) is positioned at a first station, an oil inlet of the electromagnetic directional valve (12) is communicated with an oil return port of the multi-way valve (0), at the moment, an oil inlet of a first overflow valve (13) is communicated with an oil outlet of the first overflow valve (13), and a first oil inlet of the multi-way valve (0) forms an unloading oil way through the first overflow valve (13) to the oil return port of the multi-way valve (0); when the electromagnetic reversing valve (12) is located at the second station, the oil inlet of the electromagnetic reversing valve (12) is disconnected with the oil outlet of the electromagnetic reversing valve (12).

3. The multiplex valve with micro-switches as in claim 1, wherein: the multi-way valve (0) also comprises a rotary control joint (6) and a second oil inlet joint (7);

the rotary control unit (6) comprises a rotary control valve (61), and a second oil inlet of the multi-way valve (0) is communicated towards an oil inlet of the rotary control valve (61) in a one-way mode;

the second oil inlet union (7) is arranged between a second oil inlet of the multi-way valve (0) and an oil return port of the multi-way valve (0), and the second oil inlet union (7) is configured to control the on-off of an oil path between a second oil inlet of the multi-way valve (0) and the oil return port of the multi-way valve (0).

4. The multiplex valve with micro-switches as in claim 3, wherein: the first oil inlet joint (1) comprises an electromagnetic directional valve (12) and a first overflow valve (13), an oil inlet of the first overflow valve (13) is connected with a first oil inlet of the multi-way valve (0), a pilot cavity of the first overflow valve (13) is connected with an oil inlet of the electromagnetic directional valve (12) and is communicated in a one-way mode from the pilot cavity of the first overflow valve (13) to the oil inlet of the electromagnetic directional valve (12), and an oil outlet of the first overflow valve (13) and an oil outlet of the electromagnetic directional valve (12) are both connected with an oil return port of the multi-way valve (0);

the second oil inlet joint (7) comprises a second overflow valve (71), an oil inlet of the second overflow valve (71) is connected with a second oil inlet of the multi-way valve (0), a pilot cavity of the second overflow valve (71) is connected with an oil inlet of the electromagnetic directional valve (12) and is communicated towards the oil inlet of the electromagnetic directional valve (12) in a one-way mode through the pilot cavity of the second overflow valve (71), and an oil outlet of the second overflow valve (71) is connected with an oil return port of the multi-way valve (0);

the electromagnetic directional valve (12) comprises a first station and a second station; when the electromagnetic reversing valve (12) is positioned at a first station, an oil inlet of the electromagnetic reversing valve (12) is communicated with an oil return port of the multi-way valve (0), at the moment, an oil inlet of a first overflow valve (13) is communicated with an oil outlet of the first overflow valve (13), an oil inlet of a second overflow valve (71) is communicated with an oil outlet of the second overflow valve (71), a first oil inlet of the multi-way valve (0) forms an unloading oil way to the oil return port of the multi-way valve (0) through the first overflow valve (13), and a second oil inlet of the multi-way valve (0) forms an unloading oil way to the oil return port of the multi-way valve (0) through the second overflow valve (71) and the electromagnetic reversing valve (12) in sequence; when the electromagnetic directional valve (12) is located at the second station, the oil inlet of the electromagnetic directional valve (12) is disconnected with the oil outlet of the electromagnetic directional valve (12).

5. Multiple-way valve with microswitch according to claim 3 or 4, characterized in that: the multi-way valve (0) further comprises an oil return joint (5), and the oil return joint (5) comprises a fifth one-way valve (51) and a third overflow valve (52);

an oil inlet of the fifth one-way valve (51) is connected with a second oil inlet of the multi-way valve (0), an oil outlet of the fifth one-way valve (51) is connected with an oil inlet of the winch reversing valve (42), the rotary control valve (61) is arranged on an oil path between the oil inlet of the fifth one-way valve (51) and the second oil inlet of the multi-way valve (0), and the rotary control valve (61) is configured to control the on-off of the second oil inlet of the multi-way valve (0) and the oil inlet of the fifth one-way valve (51);

an oil inlet of the third overflow valve (52) is connected to an oil path between an oil inlet of the fifth one-way valve (51) and a second oil inlet of the multi-way valve (0), and an oil outlet of the third overflow valve (52) is connected with an oil return port of the multi-way valve (0).

6. The multiplex valve with microswitch of claim 1, wherein: the telescopic valve core connecting push rod (24), the amplitude-variable valve core connecting push rod (34) and the winch valve core connecting push rod (44) comprise groove surfaces and non-groove surfaces;

when a roller of the telescopic joint micro switch (23) is in contact with a non-groove surface of the telescopic joint valve core push rod (24), the telescopic joint micro switch (23) is turned on, and when the roller of the telescopic joint micro switch (23) is in contact with a groove surface of the telescopic joint valve core push rod (24), the telescopic joint micro switch (23) is turned off;

when the roller of the amplitude-variable linkage microswitch (33) is in contact with the non-groove surface of the amplitude-variable linkage valve core push rod (34), the amplitude-variable linkage microswitch (33) is started, and when the roller of the amplitude-variable linkage microswitch (33) is in contact with the groove surface of the amplitude-variable linkage valve core push rod (34), the amplitude-variable linkage microswitch (33) is closed;

when the roller of the winch connection microswitch (43) is in contact with the non-groove surface of the winch connection valve core push rod (44), the winch connection microswitch (43) is started, and when the roller of the winch connection microswitch (43) is in contact with the groove surface of the winch connection valve core push rod (44), the winch connection microswitch (43) is closed.

7. The multiplex valve with microswitch of claim 1 or 6, wherein: the telescopic reversing valve (22) comprises an upper position, a middle position and a lower position; the telescopic reversing valve (22) is positioned at a middle position, an oil inlet of the telescopic reversing valve (22), a first working oil port of the telescopic reversing valve (22), a second working oil port of the telescopic reversing valve (22) and an oil return port of the telescopic reversing valve (22) are all in a disconnected state, and a middle oil way of the telescopic reversing valve (22) is in a connected state; the telescopic reversing valve (22) is positioned at an upper position, an oil inlet of the telescopic reversing valve (22) and a first working oil port of the telescopic reversing valve (22) are in a conducting state, a second working oil port of the telescopic reversing valve (22) and an oil return port of the telescopic reversing valve (22) are in a conducting state, and a middle oil way of the telescopic reversing valve (22) is in a disconnected state; the telescopic reversing valve (22) is in a lower position, an oil inlet of the telescopic reversing valve (22) and a second working oil port of the telescopic reversing valve (22) are in a conducting state, a first working oil port of the telescopic reversing valve (22) and an oil return port of the telescopic reversing valve (22) are in a conducting state, and a middle oil way of the telescopic reversing valve (22) is in a disconnected state; a first working oil port of the telescopic reversing valve (22) is communicated with an oil port A1 of the multi-way valve (0), a second working oil port of the telescopic reversing valve (22) is communicated with an oil port B1 of the multi-way valve (0), and an oil return port of the telescopic reversing valve (22) is communicated with an oil return port of the multi-way valve (0);

the amplitude-variable reversing valve (32) comprises an upper position, a middle position and a lower position; the variable-amplitude reversing valve (32) is positioned at a middle position, an oil inlet of the variable-amplitude reversing valve (32), a first working oil port of the variable-amplitude reversing valve (32), a second working oil port of the variable-amplitude reversing valve (32) and an oil return port of the variable-amplitude reversing valve (32) are all in a disconnected state, and a middle oil way of the variable-amplitude reversing valve (32) is in a connected state; the variable-amplitude reversing valve (32) is positioned at an upper position, an oil inlet of the variable-amplitude reversing valve (32) and a first working oil port of the variable-amplitude reversing valve (32) are in a conduction state, a second working oil port of the variable-amplitude reversing valve (32) and an oil return port of the variable-amplitude reversing valve (32) are in a conduction state, and a middle oil way of the variable-amplitude reversing valve (32) is in a disconnection state; the variable-amplitude reversing valve (32) is in a lower position, an oil inlet of the variable-amplitude reversing valve (32) and a second working oil port of the variable-amplitude reversing valve (32) are in a conducting state, a first working oil port of the variable-amplitude reversing valve (32) and an oil return port of the variable-amplitude reversing valve (32) are in a conducting state, and a middle oil way of the variable-amplitude reversing valve (32) is in a disconnected state; a first working oil port of the variable-amplitude reversing valve (32) is communicated with an A2 oil port of the multi-way valve (0), a second working oil port of the variable-amplitude reversing valve (32) is communicated with a B2 oil port of the multi-way valve (0), and an oil return port of the variable-amplitude reversing valve (32) is communicated with an oil return port of the multi-way valve (0);

the winch reversing valve (42) comprises an upper position, a middle position and a lower position; the winch reversing valve (42) is positioned at a middle position, a first working oil port of the winch reversing valve (42), a second working oil port of the winch reversing valve (42) and an oil return port of the winch reversing valve (42) are all in a conduction state, and a middle path oil path of the winch reversing valve (42) is in a conduction state; the winch reversing valve (42) is positioned at an upper position, an oil inlet of the winch reversing valve (42) and a first working oil port of the winch reversing valve (42) are in a conducting state, a second working oil port of the winch reversing valve (42) and an oil return port of the winch reversing valve (42) are in a conducting state, and a middle oil path of the winch reversing valve (42) is in a disconnected state; the winch reversing valve (42) is in a lower position, an oil inlet of the winch reversing valve (42) and a second working oil port of the winch reversing valve (42) are in a conducting state, a first working oil port of the winch reversing valve (42) and an oil return port of the winch reversing valve (42) are in a conducting state, and a middle oil path of the winch reversing valve (42) is in a disconnected state; a first working oil port of the winch reversing valve (42) is communicated with an oil port A3 of the multi-way valve (0), a second working oil port of the winch reversing valve (42) is communicated with an oil port B3 of the multi-way valve (0), and an oil return port of the winch reversing valve (42) is communicated with an oil return port of the multi-way valve (0);

the middle oil way of the telescopic reversing valve (22), the middle oil way of the variable-amplitude reversing valve (32) and the middle oil way of the winch reversing valve (42) are arranged on the oil way between the first oil inlet of the multi-way valve (0) and the oil return port of the multi-way valve (0), the middle oil way of the telescopic reversing valve (22) and the middle oil way of the variable-amplitude reversing valve (32) are in a conduction state, and the first oil inlet of the multi-way valve (0) is communicated with the oil inlet of the winch reversing valve (42).

8. A moment integrated control system, characterized by: the multi-way valve with the microswitch as in claim 7, wherein the first oil inlet of the multi-way valve (0) is connected with an oil supply system, and the oil return port of the multi-way valve (0) is connected with an oil tank; an A1 oil port of the multi-way valve (0) is connected with a rod cavity of the telescopic oil cylinder (8), and a B1 oil port of the multi-way valve (0) is connected with a rodless cavity of the telescopic oil cylinder (8); an A2 oil port of the multi-way valve (0) is connected with a rod cavity of the variable amplitude oil cylinder (9), and a B2 oil port of the multi-way valve (0) is connected with a rodless cavity of the variable amplitude oil cylinder (9); an oil port A3 of the multi-way valve (0) is connected with a falling cavity of the hoisting mechanism (10), and an oil port B3 of the multi-way valve (0) is connected with a lifting cavity of the hoisting mechanism (10);

when the telescopic reversing valve (22) is in a lower position, the telescopic linkage micro switch (23) is configured to be opened; when the amplitude-variable reversing valve (32) is positioned at an upper position, the control amplitude-variable linkage microswitch (33) is configured to be opened; when the winch reversing valve (42) is in the lower position, the winch connection microswitch (43) is configured to be opened.

9. The torque integrated control system according to claim 8, wherein: the multi-way valve (0) further comprises an oil return joint (5), a rotary control joint (6) and a second oil inlet joint (7);

the rotary control valve (61) comprises an upper position, a middle position and a lower position; the rotary control valve (61) is in a middle position, a first working oil port of the rotary control valve (61), a second working oil port of the rotary control valve (61) and an oil return port of the rotary control valve (61) are in a conducting state, and a middle path oil way of the rotary control valve (61) is in a conducting state; the rotary control valve (61) is in an upper position, an oil inlet of the rotary control valve (61) is in a conducting state with a first working oil port of the rotary control valve (61), a second working oil port of the rotary control valve (61) is in a conducting state with an oil return port of the rotary control valve (61), and a middle oil path of the rotary control valve (61) is in a disconnected state; the rotary control valve (61) is in a lower position, an oil inlet of the rotary control valve (61) and a second working oil port of the rotary control valve (61) are in a conducting state, a first working oil port of the rotary control valve (61) and an oil return port of the rotary control valve (61) are in a conducting state, and a middle oil path of the rotary control valve (61) is in a disconnected state; a first working oil port of the rotary control valve (61) is communicated with an A4 oil port of the multi-way valve (0), a second working oil port of the rotary control valve (61) is communicated with a B4 oil port of the multi-way valve (0), and an oil return port of the rotary control valve (61) is communicated with an oil return port of the multi-way valve (0); an A4 oil port of the multi-way valve (0) is communicated with a forward rotation cavity of the swing mechanism (100), and a B4 oil port of the multi-way valve (0) is communicated with a reverse rotation cavity of the swing mechanism (100);

the oil return joint (5) comprises a fifth one-way valve (51) and a third overflow valve (52);

an oil inlet of the fifth one-way valve (51) is connected with a second oil inlet of the multi-way valve (0), an oil outlet of the fifth one-way valve (51) is connected with an oil inlet of the winch reversing valve (42), the rotary control valve (61) is arranged on an oil path between the oil inlet of the fifth one-way valve (51) and the second oil inlet of the multi-way valve (0), and a middle oil path of the rotary control valve (61) is configured to control the on-off of the second oil inlet of the multi-way valve (0) and the oil inlet of the fifth one-way valve (51);

an oil inlet of the third overflow valve (52) is connected to an oil path between an oil inlet of the fifth one-way valve (51) and a second oil inlet of the multi-way valve (0), and an oil outlet of the third overflow valve (52) is connected with an oil return port of the multi-way valve (0);

10. The torque integrated control system according to claim 9, wherein: the oil supply system comprises a duplex pump, an oil outlet of a large hydraulic pump of the duplex pump is connected with a first oil inlet of the multi-way valve (0), and an oil outlet of a small hydraulic pump of the duplex pump is connected with a second oil inlet of the multi-way valve (0).