CN207632398U - Overload protective device - Google Patents
Overload protective device Download PDFInfo
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- CN207632398U CN207632398U CN201721797422.1U CN201721797422U CN207632398U CN 207632398 U CN207632398 U CN 207632398U CN 201721797422 U CN201721797422 U CN 201721797422U CN 207632398 U CN207632398 U CN 207632398U
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- valve
- mouthfuls
- overload protection
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- hydraulic
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Abstract
The utility model provides a kind of overload protective device; including hydraulic pump, reversal valve, safety valve, balanced valve, hydraulic motor, brake, winch and fuel tank; fuel tank, hydraulic pump, reversal valve and hydraulic motor form open circuit; the oil outlet of hydraulic pump is equipped with safety valve; hydraulic motor drives winch; the hydraulic fluid port that hydraulic motor corresponds to winch vertical motion is equipped with balanced valve; winch is equipped with brake; winch is tied with steel wire rope and is equipped with suspender, further includes the overload protection valve being arranged between hydraulic pump and reversal valve, repairing oil sources and control oil sources.Overload protective device provided by the utility model is safe and reliable; it is possible to prevente effectively from loop wheel machine causes to damage because of overload; especially suitable for open type hydraulic system; by the way that twice overload protection solenoid valve is arranged; especially the first overload protection solenoid valve uses the solenoid valve with positioning; can meet the needs of loop wheel machine different working modes, the state before remaining powered off can be played.
Description
Technical field
The utility model is related to a kind of overload protective devices, are used for loop wheel machine elevator winch, belong to technical field of crane equipment.
Background technology
The especially marine loop wheel machine such as jack up used of existing loop wheel machine or semisubmersible drilling platform loop wheel machine, were using
It is possible that suspension hook is recharged ship or other motive objects tangle in journey, since tender or other motive objects are under wind wave action
It can move therefore suspension hook can be caused, which to pull loop wheel machine, makes loop wheel machine overload, so as to cause loop wheel machine structural damage, under serious conditions, loop wheel machine meeting
It caves in and as tender or other motive objects sink to seabed together, consequence is very serious.
Invention content
The purpose of this utility model is to provide a kind of overload protective devices, it is possible to prevente effectively from loop wheel machine causes because of overload
Damage.
To solve the above problems, the utility model provides a kind of overload protective device, including hydraulic pump, reversal valve, safety
Valve, balanced valve, hydraulic motor, brake, winch and fuel tank, the fuel tank, the hydraulic pump, the reversal valve and the hydraulic pressure horse
Up to composition open circuit, the oil outlet of the hydraulic pump is equipped with safety valve, and the hydraulic motor drives the winch, the hydraulic pressure
The hydraulic fluid port that motor corresponds to the winch vertical motion is equipped with the balanced valve, and the winch is equipped with the brake, the strand
Vehicle is tied with steel wire rope and is equipped with suspender, further includes the overload protection valve being arranged between the hydraulic pump and the reversal valve, mends
Oil sources and control oil sources, the hydraulic fluid port of the overload protection valve includes P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls, T1 mouthfuls, C1 mouthfuls, C2 mouthfuls and C3
Mouthful, described P mouthfuls is connected to A mouthfuls, and two logical logical valves are provided between described A mouthfuls and B mouthful, and the hydraulic fluid port of the two logical logical valve includes
A mouthfuls, b mouthfuls and x mouthfuls, described A mouthfuls is connected to described a mouthfuls, and described B mouthfuls is connected to described b mouthfuls, and described A mouthfuls and described B mouthfuls is also distinguished
It is connected to described x mouthfuls by the first check valve, the x mouthfuls of the two logical logical valve are overflow by pilot operated directional control valve equipped with overload protection
Valve is flowed, the spring position of the pilot operated directional control valve makes described x mouthful to end, and the first control bit of the pilot operated directional control valve makes x mouthfuls described
Be connected to the overload protection overflow valve, the C2 mouthfuls of the overload protection valve and it is P mouthfuls described between be equipped with the first hydraulic control successively
The spring position of reversal valve, pressure reducing valve and the second check valve, first pilot operated directional control valve makes the entrance of the pressure reducing valve be connected to institute
T1 mouthfuls are stated, the control bit of first pilot operated directional control valve makes the entrance of the pressure reducing valve be connected to described C2 mouthfuls, the overload protection
The T mouthfuls of valve and it is B mouthfuls described between be equipped with logical valve, the control port of the logical valve is connected to by the second pilot operated directional control valve
T1 mouthfuls described, the spring position of second pilot operated directional control valve makes the control port of the logical valve be connected to described T1 mouthfuls, and described the
The control bit of two pilot operated directional control valves makes the control port of the logical valve end, the logical valve when its control port ends at
In cut-off position, in its control port draining in connection position, the first hydraulic control mouth of the pilot operated directional control valve, first hydraulic control
The hydraulic control mouth of reversal valve is connected to C3 mouthfuls described with the hydraulic control mouth of second pilot operated directional control valve, and described C3 mouthfuls passes sequentially through first
Overload protection solenoid valve and described C1 mouthfuls of the second overload protection solenoid valve connection, the first overload protection solenoid valve are two four
Three-way electromagnetic valve and machinery positioning is carried, the first overload protection solenoid valve is connected to second mistake for described C3 mouthful in enable bit
The oil outlet of protection solenoid valve is carried, the first overload protection solenoid valve is connected to described T1 mouthfuls for described C3 mouthful when forbidding, institute
State the second overload protection solenoid valve must not electricity when its oil outlet connection it is described T1 mouthfuls, when the second overload protection solenoid valve obtains electric
Described C1 mouthful of its oil outlet connection, the P mouthfuls of the overload protection valve oil outlets for being connected to the hydraulic pump, it is described T mouthfuls and
The T1 mouthfuls of connection fuel tank, the oil inlet of the A mouthfuls of connection reversal valve, the B mouthfuls of connection reversal valve return
Hydraulic fluid port, the C1 mouthfuls of connection control oil sources, the C2 mouthfuls of connection repairing oil sources, the C3 mouthfuls of connection balanced valve
Control mouth and the brake liberation port.
Further, the pilot operated directional control valve is three position four-way directional control valve, and wherein position is y-function, and oil inlet passes through the
One throttle valve is connected to the x mouthfuls of described two logical logical valves, an actuator port of the pilot operated directional control valve with second throttle
It is equipped with the overload protection overflow valve, another actuator port of the pilot operated directional control valve is equipped with identical tension overflow valve, institute
Stating the second control bit of pilot operated directional control valve makes the x mouthfuls of connection identical tension overflow valve, the second liquid of the pilot operated directional control valve
Control mouth and the control oil sources be connected to by identical tension solenoid valve, institute's identical tension solenoid valve must not electricity when the pilot operated directional control valve the
Described T1 mouthful of two hydraulic control mouths connection, described in the second hydraulic control mouth of identical tension solenoid valve pilot operated directional control valve when obtaining electric is connected to
Control oil sources.The identical tension function of winch cable can be provided.
Further, total overload protection overflow valve, total overload protection are additionally provided on the x mouthfuls of described two logical logical valves
Overflow valve and it is x mouthfuls described between be equipped with the second throttle.Play double protection.
Further, the oil outlet of the second overload protection solenoid valve is additionally provided with overload protection pressure sensor, and described
One check valve and it is x mouthfuls described between be additionally provided with third throttle valve.
Further, the driving input terminal in the winch is arranged in the brake, and the brake carries holdback, the winch
When vertical motion, the brake need not open, and when the winch lowering action, the brake needs to open.
The utility model also provides the working method of above-mentioned overload protective device, including ascending fashion, drop mode and guarantor
Shield pattern：
Ascending fashion：Start the hydraulic pump, the reversal valve switched into upper raise-position, and controls the brake and open,
Oil after hydraulic pump pressurization enters the reversal valve through the overload protection valve, then through described in balanced valve entrance
Hydraulic motor is to drive the winch to rise, and the oil return of the hydraulic motor is through the reversal valve and the overload protection valve
Fuel tank is flowed back to, the first overload protection solenoid valve and the second overload protection solenoid valve must not be electric, in the overload protection valve
Portion, P mouthfuls of the pressure oil enter described x mouthfuls through first check valve and close described two logical logical valves, first liquid
Control reversal valve and second pilot operated directional control valve are in spring position, and the logical valve is in connection position, the pressure reducing valve connection
It is T1 mouthfuls described；
Drop mode：Start the hydraulic pump, the reversal valve is switched into lower decrease, and control the balanced valve and institute
It states brake to open, the oil after hydraulic pump pressurization enters the reversal valve through the overload protection valve, subsequently into described
Hydraulic motor is to drive the winch to decline, and the oil return of the hydraulic motor is through the balanced valve and the reversal valve and institute
It states overload protection valve and flows back to fuel tank, the first overload protection solenoid valve and the second overload protection solenoid valve must not be electric, described
Inside overload protection valve, P mouthfuls of the pressure oil enters described x mouthfuls through first check valve and closes described two logical logical valves
It closes, first pilot operated directional control valve and second pilot operated directional control valve are in spring position, and the logical valve is in connection position, institute
State described T1 mouthfuls of pressure reducing valve connection；
Protected mode：It controls the reversal valve and switches to lower decrease, the described of the first overload protection solenoid valve of control enables
Position solenoid valve and the second overload protection solenoid valve obtain it is electric, inside the overload protection valve, described C3 mouthful through described C1 mouthfuls connection
The control oil sources, the pilot operated directional control valve are in the first control bit, and described x mouthfuls is connected to the overload through the pilot operated directional control valve
Overflow valve, first pilot operated directional control valve and second pilot operated directional control valve is protected to be in control bit, the logical valve is in
End position, the pressure reducing valve is connected to the repairing oil sources, and the pressure oil of the control oil sources enters the balance through described C3 mouthfuls
The liberation port of the control mouth of valve and the brake opens the balanced valve and the brake, and the winch can be outside at this time
Passively decline under the action of power；
Further, when being provided with the identical tension overflow valve, in ascending fashion, controlling the identical tension solenoid valve makes
The pilot operated directional control valve be in the second control bit to make the x mouthfuls of connection identical tension overflow valve, the hydraulic pressure at this time
The inlet pressure of motor is limited by the identical tension overflow valve, the tension kept constant on the steel wire rope of the winch.
Compared with prior art, the technical solution of the utility model has the following advantages：
Overload protective device and its working method provided by the utility model are safe and reliable, it is possible to prevente effectively from loop wheel machine is because of mistake
It carries and causes to damage, especially suitable for open type hydraulic system, while the functions such as identical tension can be integrated, the loop wheel machine function of making is more
Comprehensively, it is more reasonable to control, and uses band fixed by the way that twice overload protection solenoid valve, especially the first overload protection solenoid valve is arranged
The solenoid valve of position, can meet the needs of loop wheel machine different working modes, can play the state before remaining powered off.
Description of the drawings
Fig. 1 is the principle schematic of the utility model embodiment one；
In figure：1 is hydraulic pump, and 2 be reversal valve, and 3 be safety valve, and 4 be balanced valve, and 5 be hydraulic motor, and 6 be brake, and 7 are
Winch, 8 be overload protection valve, and 9 be repairing oil sources, 10 oil sources in order to control, and 11 be two logical logical valves, and 12 be the first check valve, 13
It is overload protection overflow valve for pilot operated directional control valve, 14,15 be the first pilot operated directional control valve, and 16 be pressure reducing valve, and 17 be the second check valve,
18 be the first overload protection solenoid valve, and 19 be logical valve, and 20 be the second pilot operated directional control valve, and 21 be identical tension overflow valve, and 22 are
Identical tension solenoid valve, 23 be total overload protection overflow valve, and 24 be overload protection pressure sensor, and 25 be first throttle valve, and 26 are
Second throttle, 27 be third throttle valve, and 28 be the second overload protection solenoid valve.
Specific implementation mode
It is understandable to enable the above objects, features, and advantages of the utility model to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.
Those skilled in the art of the present technique are appreciated that unless otherwise defined all terms used herein include technology art
Language and direction term have meaning identical with the general understanding of the those of ordinary skill in the utility model fields.
Embodiment
A kind of overload protective device as shown in Figure 1, including hydraulic pump 1, reversal valve 2, safety valve 3, balanced valve 4, hydraulic pressure horse
Up to 5, brake 6, winch 7 and fuel tank, the fuel tank, the hydraulic pump 1, the reversal valve 2 and the hydraulic motor 5 form open type
The oil outlet in circuit, the hydraulic pump 1 is equipped with safety valve 3, and the hydraulic motor 5 drives the winch 7, the hydraulic motor 5
The hydraulic fluid port of corresponding 7 vertical motion of winch is equipped with the balanced valve 4, and the winch 7 is equipped with the brake 6, the strand
Vehicle 7 is tied with steel wire rope and is equipped with suspender, further includes the overload protection valve being arranged between the hydraulic pump 1 and the reversal valve 2
8, repairing oil sources 9 and control oil sources 10, the hydraulic fluid port of the overload protection valve 8 includes P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls, T1 mouthfuls, C1 mouthfuls, C2
Mouthful and C3 mouthfuls, described P mouthfuls is connected to A mouthfuls, and two logical logical valves 11, the two logical logical valve 11 are provided between described A mouthfuls and B mouthful
Hydraulic fluid port include a mouthfuls, b mouthfuls and x mouthfuls, described A mouthfuls is connected to described a mouthfuls, and described B mouthfuls is connected to described b mouthfuls, described A mouthfuls and institute
It states B mouthfuls and is also connected to respectively by the first check valve 12 x mouthfuls described, the x mouthfuls of the two logical logical valve 11 pass through liquid controlled reversing
Valve 13 is equipped with overload protection overflow valve 14, and the spring position of the pilot operated directional control valve 13 makes the x mouthfuls of cut-off, the pilot operated directional control valve
13 the first control bit makes the x mouthfuls of connection overload protection overflow valve 14, the C2 mouthfuls and institute of the overload protection valve 8
The first pilot operated directional control valve 15, pressure reducing valve 16 and the second check valve 17, first pilot operated directional control valve 15 are equipped between stating P mouthfuls successively
Spring position so that the entrance of the pressure reducing valve 16 is connected to described T1 mouthful, the control bit of first pilot operated directional control valve 15 make described in subtract
Described C2 mouthful, the T mouthfuls of the overload protection valve 8 of the entrance connection of pressure valve 16 and it is B mouthfuls described between equipped with logical valve 19, institute
The control port for stating logical valve 19 is connected to T1 mouthfuls described, the bullet of second pilot operated directional control valve 20 by the second pilot operated directional control valve 20
Spring position makes the control port of the logical valve 19 be connected to described T1 mouthfuls, and the control bit of second pilot operated directional control valve 20 makes described patrol
The control port cut-off of valve 19 is collected, the logical valve 19, in cut-off position, is let out when its control port ends in its control port
In connection position, the first hydraulic control mouth of the pilot operated directional control valve 13, the hydraulic control mouth of first pilot operated directional control valve 15 and institute when oily
The hydraulic control mouth for stating the second pilot operated directional control valve 20 is connected to C3 mouthfuls described, and described C3 mouthfuls passes sequentially through the first overload protection solenoid valve 18
Be connected to the second overload protection solenoid valve 28 it is C1 mouthfuls described, the first overload protection solenoid valve 18 be two position four-way solenoid valves and
With machinery positioning, C3 mouthfuls of connection the second overload protection electricity in enable bit of the first overload protection solenoid valve 18
The oil outlet of magnet valve 28, described T1 mouthfuls of the C3 mouthfuls of connection when forbidding of the first overload protection solenoid valve 18, described the
Described T1 mouthfuls of its oil outlet connection when two overload protection solenoid valves 28 must not be electric, when the second overload protection solenoid valve 28 obtains electric
Described C1 mouthful of its oil outlet connection, it is the P mouthfuls of the overload protection valve 8 oil outlets for being connected to the hydraulic pump 1, T mouthfuls described
It is connected to the fuel tank with described T1 mouthfuls, the described A mouthfuls oil inlet for being connected to the reversal valve 2, described B mouthfuls is connected to the reversal valve 2
Oil return opening, the C1 mouthfuls of connection control oil sources 10, described C2 mouthful is connected to the repairing oil sources 9, and described C3 mouthfuls is connected to institute
State the liberation port of the control mouth and the brake 6 of balanced valve 4.
The pilot operated directional control valve 13 is three position four-way directional control valve, and wherein position is y-function, and oil inlet passes through first throttle
Valve 25 is connected to the x mouthfuls of described two logical logical valves 11, a working oil of the pilot operated directional control valve 13 with second throttle 26
Mouth is equipped with the overload protection overflow valve 14, another actuator port of the pilot operated directional control valve 13 is equipped with identical tension overflow
Second control bit of valve 21, the pilot operated directional control valve 13 makes the x mouthfuls of connection identical tension overflow valve 21, the liquid controlled reversing
Second hydraulic control mouth of valve 13 is connected to the control oil sources 10 by identical tension solenoid valve 22, when institute's identical tension solenoid valve 22 must not be electric
Described T1 mouthfuls of the second hydraulic control mouth connection of the pilot operated directional control valve 13, the identical tension solenoid valve 22 liquid controlled reversing when obtaining electric
Second hydraulic control mouth of valve 13 is connected to the control oil sources 10.
Total overload protection overflow valve 23 is additionally provided on the x mouthfuls of the two logical logical valve 11, total overload protection overflows
Flow valve 23 and it is x mouthful described between equipped with the second throttle 26.
The oil outlet of the second overload protection solenoid valve 28 is additionally provided with overload protection pressure sensor 24, and described first is single
To valve 12 and it is x mouthfuls described between be additionally provided with third throttle valve 27.
The brake 6 is arranged driving input terminal in the winch 7, and the brake 6 carries holdback, on the winch 7
When rising action, the brake 6 need not open, and when 7 lowering action of winch, the brake 6 needs to open.
In the present embodiment, the port for drawdown of described C3 mouthfuls and the hydraulic motor 5 passes through shuttle valve, the shuttle valve outlet
The liberation port of the control mouth of the balanced valve 4 and the brake 6.In drop mode, the pressure of 5 port for drawdown of the hydraulic motor
Oil can directly open the balanced valve 4 and the brake 6, naturally it is also possible to be opened using other external pressure oil described flat
Weighing apparatus valve 4 and the brake 6.
Working method：
The working method of above-mentioned overload protective device, including ascending fashion, drop mode and protected mode：
Ascending fashion：Start the hydraulic pump 1, the reversal valve 2 is switched into upper raise-position, and controls the brake 6 dozens
It opens（Since the brake 6 carries holdback in the present embodiment, the brake 6 described in ascending fashion can not open）, through described
Oil after hydraulic pump 1 pressurizes enters the reversal valve 2 through the overload protection valve 8, then enters the liquid through the balanced valve 4
Pressure motor 5 is to drive the winch 7 to rise, and the oil return of the hydraulic motor 5 is through the reversal valve 2 and the overload protection
Valve 8 flows back to fuel tank, and the first overload protection solenoid valve 18 and the second overload protection solenoid valve 28 must not be electric, protected in the overload
It protecting inside valve 8, P mouthfuls of the pressure oil enters described x mouthfuls through first check valve 12 and closes described two logical logical valves 11,
First pilot operated directional control valve 15 and second pilot operated directional control valve 20 are in spring position, and the logical valve 19 is in connection
Position, the pressure reducing valve 16 is connected to T1 mouthfuls described；
Drop mode：Start the hydraulic pump 1, the reversal valve 2 is switched into lower decrease, and control the balanced valve 4
It is opened with the brake 6, the oil after the pressurization of the hydraulic pump 1 enters the reversal valve 2 through the overload protection valve 8, then
Into the hydraulic motor 5 to drive the winch 7 to decline, the oil return of the hydraulic motor 5 is through the balanced valve 4 and described
Reversal valve 2 and the overload protection valve 8 flow back to fuel tank, the first overload protection solenoid valve 18 and the second overload protection electromagnetism
Valve 28 must not be electric, and inside the overload protection valve 8, P mouthfuls of the pressure oil enters described x mouthfuls through first check valve 12
Described two logical logical valves 11 are closed, first pilot operated directional control valve 15 and second pilot operated directional control valve 20 are in spring
Position, the logical valve 19 are in connection position, and the pressure reducing valve 16 is connected to T1 mouthfuls described；
Protected mode：It controls the reversal valve 2 and switches to lower decrease, the described of the first overload protection solenoid valve 18 of control makes
Energy position solenoid valve and the second overload protection solenoid valve 28 must be electric, and inside the overload protection valve 8, described C3 mouthfuls through C1 mouthfuls described
It is connected to the control oil sources 10, the pilot operated directional control valve 13 is in the first control bit, and described x mouthfuls connects through the pilot operated directional control valve 13
Lead to the overload protection overflow valve 14, first pilot operated directional control valve 15 and second pilot operated directional control valve 20 are in control
Position, the logical valve 19 are in cut-off position, and the pressure reducing valve 16 is connected to the repairing oil sources 9, the pressure of the control oil sources 10
The liberation port of control mouth and the brake 6 that oil enters the balanced valve 4 through described C3 mouthfuls, by the balanced valve 4 and the brake
Vehicle 6 is opened, and the winch 7 can passively decline under the effect of external force at this time；
When being provided with the identical tension overflow valve 21, in ascending fashion, controls the identical tension solenoid valve 22 and make
The pilot operated directional control valve 13 is in the second control bit to make described x mouthfuls to connect the identical tension overflow valve 21, at this time the liquid
The inlet pressure of pressure motor 5 is limited by the identical tension overflow valve 21, kept constant on the steel wire rope of the winch 7
Power.
Although the utility model discloses as above, the utility model is not limited to this.Any those skilled in the art,
It does not depart from the spirit and scope of the utility model, can make various changes or modifications, therefore the scope of protection of the utility model
It should be subject to claim limited range.
Claims (5)
1. a kind of overload protective device, including hydraulic pump（1）, reversal valve（2）, safety valve（3）, balanced valve（4）, hydraulic motor
（5）, brake（6）, winch（7）And fuel tank, the fuel tank, the hydraulic pump（1）, the reversal valve（2）With the hydraulic motor
（5）Form open circuit, the hydraulic pump（1）Oil outlet be equipped with safety valve（3）, the hydraulic motor（5）Drive the strand
Vehicle（7）, the hydraulic motor（5）The corresponding winch（7）The hydraulic fluid port of vertical motion is equipped with the balanced valve（4）, the strand
Vehicle（7）It is equipped with the brake（6）, the winch（7）It is tied with steel wire rope and is equipped with suspender, it is characterised in that：It further include setting
In the hydraulic pump（1）With the reversal valve（2）Between overload protection valve（8）, repairing oil sources（9）With control oil sources（10）,
The overload protection valve（8）Hydraulic fluid port include P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls, T1 mouthfuls, C1 mouthfuls, C2 mouthfuls and C3 mouthfuls, described P mouthfuls and A mouthfuls
It is connected to, two logical logical valves is provided between described A mouthfuls and B mouthful（11）, the two logical logical valve（11）Hydraulic fluid port include a mouthfuls, b mouthfuls
With x mouthfuls, described A mouthfuls is connected to described a mouthfuls, and described B mouthfuls is connected to described b mouthfuls, and described A mouthfuls and described B mouthfuls are also respectively by the
One check valve（12）It is connected to x mouthfuls described, the two logical logical valve（11）The x mouthfuls pass through pilot operated directional control valve（13）Equipped with overload
Protect overflow valve（14）, the pilot operated directional control valve（13）Spring position make it is described x mouthfuls cut-off, the pilot operated directional control valve（13）
One control bit makes the x mouthfuls of connection overload protection overflow valve（14）, the overload protection valve（8）The C2 mouthfuls with it is described
The first pilot operated directional control valve is equipped between P mouthfuls successively（15）, pressure reducing valve（16）With the second check valve（17）, first liquid controlled reversing
Valve（15）Spring position make the pressure reducing valve（16）Entrance connection it is described T1 mouthfuls, first pilot operated directional control valve（15）Control
Position makes the pressure reducing valve（16）Entrance connection it is described C2 mouthfuls, the overload protection valve（8）The T mouthfuls and it is B mouthfuls described between
Equipped with logical valve（19）, the logical valve（19）Control port pass through the second pilot operated directional control valve（20）It is connected to T1 mouthfuls described, institute
State the second pilot operated directional control valve（20）Spring position make the logical valve（19）Control port connection it is described T1 mouthfuls, second liquid
Control reversal valve（20）Control bit make the logical valve（19）Control port cut-off, the logical valve（19）In its control port
In cut-off position when cut-off, in its control port draining in connection position, the pilot operated directional control valve（13）The first hydraulic control mouth,
First pilot operated directional control valve（15）Hydraulic control mouth and second pilot operated directional control valve（20）Hydraulic control mouth be connected to it is C3 mouthfuls described,
Described C3 mouthfuls passes sequentially through the first overload protection solenoid valve（18）With the second overload protection solenoid valve（28）It is connected to C1 mouthfuls described, institute
State the first overload protection solenoid valve（18）For two position four-way solenoid valves and carry machinery positioning, the first overload protection solenoid valve
（18）The C3 mouthfuls of connection the second overload protection solenoid valve in enable bit（28）Oil outlet, first overload protection
Solenoid valve（18）Described T1 mouthfuls of the C3 mouthfuls of connection, the second overload protection solenoid valve when forbidding（28）Must not electricity when its
Described T1 mouthfuls of oil outlet connection, the second overload protection solenoid valve（28）Described C1 mouthfuls of its oil outlet connection, described when obtaining electric
Overload protection valve（8）The P mouthfuls of connection hydraulic pumps（1）Oil outlet, described T mouthfuls be connected to the oil with described T1 mouthfuls
Case, the A mouthfuls of connection reversal valve（2）Oil inlet, the B mouthfuls of connection reversal valve（2）Oil return opening, it is C1 mouthfuls described
It is connected to the control oil sources（10）, the C2 mouthfuls of connection repairing oil sources（9）, the C3 mouthfuls of connection balanced valve（4）'s
Control mouth and the brake（6）Liberation port.
2. a kind of overload protective device according to claim 1, it is characterised in that：The pilot operated directional control valve（13）It is three
Four-way reversing valve, wherein position are y-function, and oil inlet passes through first throttle valve（25）And second throttle（26）Described in connection
Two logical logical valves（11）The x mouthfuls, the pilot operated directional control valve（13）An actuator port equipped with the overload protection overflow
Flow valve（14）, the pilot operated directional control valve（13）Another actuator port be equipped with identical tension overflow valve（21）, the hydraulic control changes
To valve（13）The second control bit make the x mouthfuls of connection identical tension overflow valve（21）, the pilot operated directional control valve（13）
Two hydraulic control mouths pass through identical tension solenoid valve（22）It is connected to the control oil sources（10）, the identical tension solenoid valve（22）When must not be electric
The pilot operated directional control valve（13）The second hydraulic control mouth connection it is described T1 mouthfuls, the identical tension solenoid valve（22）Hydraulic control when obtaining electric
Reversal valve（13）The second hydraulic control mouth be connected to the control oil sources（10）.
3. a kind of overload protective device according to claim 2, it is characterised in that：The two logical logical valve（11）It is described
Total overload protection overflow valve is additionally provided on x mouthfuls（23）, total overload protection overflow valve（23）With it is x mouthfuls described between be equipped with it is described
Second throttle（26）.
4. a kind of overload protective device according to claim 2, which is characterized in that the second overload protection solenoid valve
（28）Oil outlet be additionally provided with overload protection pressure sensor（24）, first check valve（12）With it is x mouthfuls described between also set
There is third throttle valve（27）.
5. a kind of overload protective device according to claim 2, which is characterized in that the brake（6）It is arranged in the strand
Vehicle（7）Driving input terminal, the brake（6）With holdback, the winch（7）When vertical motion, the brake（6）It is not required to
It opens, the winch（7）When lowering action, the brake（6）It needs to open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721797422.1U CN207632398U (en) | 2017-12-21 | 2017-12-21 | Overload protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721797422.1U CN207632398U (en) | 2017-12-21 | 2017-12-21 | Overload protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207632398U true CN207632398U (en) | 2018-07-20 |
Family
ID=62853319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721797422.1U Withdrawn - After Issue CN207632398U (en) | 2017-12-21 | 2017-12-21 | Overload protective device |
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| Country | Link |
|---|---|
| CN (1) | CN207632398U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002268A (en) * | 2017-12-21 | 2018-05-08 | 青岛天时海洋石油装备有限公司 | Overload protective device and its method of work |
| CN110985461A (en) * | 2019-10-15 | 2020-04-10 | 武汉船用机械有限责任公司 | Hydraulic motor control system |
| CN114857101A (en) * | 2022-05-20 | 2022-08-05 | 宁波新宏液压有限公司 | Intelligent protection system of speed-regulating hydraulic winch |
-
2017
- 2017-12-21 CN CN201721797422.1U patent/CN207632398U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002268A (en) * | 2017-12-21 | 2018-05-08 | 青岛天时海洋石油装备有限公司 | Overload protective device and its method of work |
| CN110985461A (en) * | 2019-10-15 | 2020-04-10 | 武汉船用机械有限责任公司 | Hydraulic motor control system |
| CN110985461B (en) * | 2019-10-15 | 2021-09-28 | 武汉船用机械有限责任公司 | Hydraulic motor control system |
| CN114857101A (en) * | 2022-05-20 | 2022-08-05 | 宁波新宏液压有限公司 | Intelligent protection system of speed-regulating hydraulic winch |
| CN114857101B (en) * | 2022-05-20 | 2024-04-05 | 宁波新宏液压有限公司 | Intelligent protection system of speed-regulating hydraulic winch |
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