CN207632397U - Automatic overload protective device - Google Patents
Automatic overload protective device Download PDFInfo
- Publication number
- CN207632397U CN207632397U CN201721797256.5U CN201721797256U CN207632397U CN 207632397 U CN207632397 U CN 207632397U CN 201721797256 U CN201721797256 U CN 201721797256U CN 207632397 U CN207632397 U CN 207632397U
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- Prior art keywords
- valve
- mouthfuls
- directional control
- logical
- hydraulic
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- Withdrawn - After Issue
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Abstract
The utility model provides a kind of automatic 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 motor form open circuit, the oil outlet of the hydraulic pump is equipped with safety valve, the hydraulic motor drives the winch, the hydraulic fluid port that the hydraulic motor corresponds to the winch vertical motion is equipped with the balanced valve, the winch is equipped with the brake, the winch is tied with steel wire rope and is equipped with suspender, the steel wire rope is equipped with pulling force sensor, it further include the automatic overload protection valve being arranged between the hydraulic pump and the reversal valve, repairing oil sources and control oil sources.Automatic overload protective device provided by the utility model especially suitable for open type hydraulic system, while can integrate the functions such as identical tension and suspender stop, the loop wheel machine function of making is more comprehensive, and control is more reasonable it is possible to prevente effectively from loop wheel machine causes to damage because of overload.
Description
Technical field
The utility model is related to a kind of automatic overload protective devices, are used for loop wheel machine elevator winch, belong to lifting equipment technology
Field.
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 automatic overload protective devices, it is possible to prevente effectively from loop wheel machine is due to overload
Cause to damage.
To solve the above problems, the utility model provides a kind of automatic 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 liquid
Pressure motor forms open circuit, and the oil outlet of the hydraulic pump is equipped with safety valve, and the hydraulic motor drives the winch, described
The hydraulic fluid port that hydraulic motor corresponds to the winch vertical motion is equipped with the balanced valve, and the winch is equipped with the brake, institute
It states winch to be tied with steel wire rope and be equipped with suspender, the steel wire rope is equipped with pulling force sensor, further includes being arranged in the hydraulic pump
Automatic overload protection valve, repairing oil sources between the reversal valve and control oil sources, the hydraulic fluid port of the automatic overload protection valve
Including P mouthfuls, T mouthfuls, A mouthfuls, B mouthfuls, T1 mouthfuls, C1 mouthfuls, C2 mouthfuls and C3 mouthfuls, described P mouthfuls is connected to A mouthfuls, is set between described A mouthfuls and B mouthful
Two logical logical valves are equipped with, the hydraulic fluid port of the two logical logical valve includes a mouthfuls, b mouthfuls and x mouthfuls, and described A mouthfuls is connected to described a mouthfuls, described
B mouthfuls are connected to described b mouthfuls, and described A mouthfuls is also connected to x mouthfuls described, the two logical logic by the first check valve respectively with described B mouthfuls
The x mouthfuls of valve are equipped with automatic overload protection overflow valve by solenoid directional control valve, and the solenoid directional control valve is x mouthfuls described when must not be electric
Cut-off, the solenoid directional control valve x mouthfuls of connection automatic overload protection overflow valve, automatic overload protection valve when obtaining electric
The C2 mouthfuls and it is P mouthfuls described between successively be equipped with the first pilot operated directional control valve, pressure reducing valve and the second check valve, first hydraulic control
The spring position of reversal valve makes the entrance of the pressure reducing valve be connected to described T mouthful, described in the control bit of first pilot operated directional control valve makes
Described C2 mouthful, the T mouthfuls of the automatic overload protection valve of the entrance connection of pressure reducing valve and it is B mouthfuls described between equipped with logical valve,
The control port of the logical valve is connected to described T1 mouthfuls by the second pilot operated directional control valve, the spring position of second pilot operated directional control valve
The control port of the logical valve is set to be connected to described T1 mouthfuls, the control bit of second pilot operated directional control valve makes the control of the logical valve
Liquefaction mouth ends, and the hydraulic control mouth of first pilot operated directional control valve is connected to the C3 with the hydraulic control mouth of second pilot operated directional control valve
Mouthful, described C3 mouthfuls is connected to described C1 mouthfuls by repairing solenoid valve, and the repairing solenoid valve is when must not be electric described in the C3 mouthfuls of connection
T1 mouthfuls, the repairing solenoid valve when obtaining electric it is described C3 mouthfuls connection it is described C1 mouthfuls, the logical valve when its control port ends at
In cut-off position, in its control port draining in connection position, the P mouthfuls of connection hydraulic pressure of the automatic overload protection valve
The oil outlet of pump, described T mouthfuls be connected to the fuel tank with described T1 mouthfuls, the oil inlet of the A mouthfuls of connection reversal valve, the B
Mouth is connected to the oil return opening of the reversal valve, the C1 mouthfuls of connection control oil sources, the C3 mouthfuls of connection repairing oil sources, institute
State the liberation port of the control mouth and the brake of the C3 mouthfuls of connection balanced valves.
Further, the solenoid directional control valve is three-position four-way electromagnetic directional valve, and wherein position is y-function, and oil inlet connects
Lead to the x mouthfuls of the two logical logical valve, an actuator port of the solenoid directional control valve is equipped with the automatic overload protection
Another actuator port of overflow valve, the solenoid directional control valve is equipped with identical tension overflow valve, can provide winch cable
Identical tension function.
Further, it is additionally provided with total overload protection overflow valve on the x mouthfuls of described two logical logical valves, further functions as safety
Effect.
Further, the x mouthfuls of described two logical logical valves are also connected with stop overflow valve, institute by third pilot operated directional control valve
It states third pilot operated directional control valve and is not connected to the stop overflow valve for described x mouthfuls at spring position, the third pilot operated directional control valve is being controlled
X mouthfuls of connection stop overflow valve when position processed, the hydraulic control mouth of the third pilot operated directional control valve is by stopping solenoid valve connection
The control oil sources, described T1 mouthfuls of the hydraulic control mouth connection of stop solenoid valve third pilot operated directional control valve when must not be electric, institute
State the hydraulic control mouth connection control oil sources for stopping third pilot operated directional control valve when solenoid valve obtains electric.
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.In this way in winch
It is more safe and reliable when lifting cargo.
The utility model also provides the working method of above-mentioned automatic overload protective device, including ascending fashion, drop mode
And protected mode：
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 automatic overload protection valve, then enters through the balanced valve
The hydraulic motor is to drive the winch to rise, and the oil return of the hydraulic motor is through the reversal valve and the automatic mistake
It carries protection valve and flows back to fuel tank, the solenoid directional control valve and the repairing solenoid valve must not be electric, in the automatic 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
Brake to be stated to open, the oil after hydraulic pump pressurization enters the reversal valve through the automatic overload protection valve, subsequently into
The hydraulic motor to drive the winch to decline, the oil return of the hydraulic motor through the balanced valve and the reversal valve with
And the automatic overload protection valve flows back to fuel tank, the solenoid directional control valve and the repairing solenoid valve must not be electric, described automatic
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：When the pulling force sensor on the steel wire rope of the winch detects that pulling force is more than predetermined value
When, control the reversal valve and switch to lower decrease, control the solenoid directional control valve and the repairing solenoid valve obtain it is electric, it is described from
Inside dynamic overload protection valve, described x mouthfuls is connected to the automatic overload protection overflow valve, the C3 mouthfuls of warp through the solenoid directional control valve
The C1 mouthfuls of connection control oil sources, first pilot operated directional control valve and second pilot operated directional control valve are in control bit,
The logical valve is in cut-off position, and the pressure reducing valve is connected to the repairing oil sources, and the pressure oil of the control oil sources is through the C3
Mouth enters the liberation port of the control mouth and the brake of the balanced valve, the balanced valve and the brake is opened, at this time institute
Stating winch can passively decline under the effect of external force；
Further, it when being provided with the identical tension overflow valve, in ascending fashion, controls the solenoid directional control valve and makes
Described x mouthfuls is connected the identical tension overflow valve, and the inlet pressure of the hydraulic motor is limited by the identical tension overflow valve at this time,
The tension kept constant on the steel wire rope of the winch.
Further, it when being provided with the stop overflow valve, in ascending fashion, controls the stop solenoid valve and makes institute
It states x mouthfuls and connects the stop overflow valve, the inlet pressure of the hydraulic motor is limited by the stop overflow valve at this time, is used for institute
The suspender for stating winch is stopped.
Compared with prior art, the technical solution of the utility model has the following advantages：
Automatic 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
Cause to damage because of overload, especially suitable for open type hydraulic system, while the functions such as identical tension and suspender stop can be integrated, made
Loop wheel machine function it is more comprehensive, control it is more reasonable.
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 automatic overload protection valve, and 9 be repairing oil sources, and 10 oil sources in order to control, 11 be two logical logical valves, and 12 is unidirectional for first
Valve, 13 be solenoid directional control valve, and 14 be automatic overload protection overflow valve, and 15 be the first pilot operated directional control valve, and 16 be pressure reducing valve, and 17 be the
Two check valves, 18 be repairing 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 be total
Overload protection overflow valve, 23 be third pilot operated directional control valve, and 24 is stop overflow valve, and 25 be stop 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（Including technology art
Language and direction term）With meaning identical with the general understanding of the those of ordinary skill in the utility model fields.
Embodiment
A kind of automatic overload protective device as shown in Figure 1, including hydraulic pump 1, reversal valve 2, safety valve 3, balanced valve 4, liquid
Pressure motor 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
The oil outlet of open circuit, the hydraulic pump 1 is equipped with safety valve 3, and the hydraulic motor 5 drives the winch 7, the hydraulic pressure horse
The hydraulic fluid port that 7 vertical motion of winch is corresponded to up to 5 is equipped with the balanced valve 4, and the winch 7 is equipped with the brake 6, described
Winch 7 is tied with steel wire rope and is equipped with suspender, and the steel wire rope is equipped with pulling force sensor, further includes being arranged in the hydraulic pump 1
Automatic overload protection valve 8, repairing oil sources 9 between the reversal valve 2 and control oil sources 10, the automatic 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 is connected to A mouthfuls, described A mouthfuls and B mouthfuls
Between be provided with two logical logical valves 11, the hydraulic fluid port of the two logical logical valve 11 includes a mouthfuls, b mouthfuls and x mouthfuls, described A mouthfuls with a
Mouth connection, described B mouthfuls is connected to described b mouthfuls, and described A mouthfuls is also connected to the x by the first check valve 12 respectively with described B mouthfuls
Mouthful, the x mouthfuls of the two logical logical valve 11 are equipped with automatic overload protection overflow valve 14, the electromagnetism by solenoid directional control valve 13
X mouthfuls of cut-off when must not be electric of reversal valve 13, is not connected to the automatic overload protection overflow valve 14, the solenoid directional control valve 13 obtains
The x mouthfuls of connection automatic overload protection overflow valve 14 when electric, the C2 mouthfuls and the P of the automatic overload protection valve 8
The first pilot operated directional control valve 15, pressure reducing valve 16 and the second check valve 17 are equipped between mouthful successively, first pilot operated directional control valve 15
Spring position makes the entrance of the pressure reducing valve 16 be connected to described T1 mouthfuls, and the control bit of first pilot operated directional control valve 15 makes the decompression
Described C2 mouthful, the T mouthfuls of the automatic overload protection valve 8 of the entrance connection of valve 16 and it is B mouthfuls described between equipped with logical valve 19,
The control port of the logical valve 19 be connected to by the second pilot operated directional control valve 20 it is T1 mouthfuls described, second pilot operated directional control valve 20
Spring position makes the control port of the logical valve 19 be connected to described T1 mouthful, described in the control bit of second pilot operated directional control valve 20 makes
The control port of logical valve 19 ends, the liquid of the hydraulic control mouth of first pilot operated directional control valve 15 and second pilot operated directional control valve 20
Control described C3 mouthful of mouth connection, described C3 mouthfuls is connected to C1 mouthfuls described by repairing solenoid valve 18, and the repairing solenoid valve 18 must not be electric
Described T1 mouthfuls of connections of C3 mouthfuls of Shi Suoshu, the repairing solenoid valve 18 described C1 mouthfuls of the C3 mouthfuls of connection, logical valve when obtaining electric
19 are in cut-off position when its control port ends, in its control port draining in connection position, the automatic overload protection
The oil outlet of the P mouthfuls of the valve 8 connections hydraulic pump 1, described T mouthful be connected to the fuel tank with described T1 mouthfuls, described A mouthfuls is connected to
The oil inlet of the reversal valve 2, the described B mouthfuls oil return opening for being connected to the reversal valve 2, the C1 mouthfuls of connection control oil sources
10, the C2 mouthfuls of connection repairing oil sources 9, the release of the described C3 mouthfuls control mouth for being connected to the balanced valve 4 and the brake 6
Mouthful.
The solenoid directional control valve 13 be three-position four-way electromagnetic directional valve, wherein position be y-function, oil inlet connection described in
One actuator port of the x mouthfuls of two logical logical valves 11, the solenoid directional control valve 13 overflows equipped with the automatic overload protection
Valve 14 is flowed, another actuator port of the solenoid directional control valve 13 is equipped with identical tension overflow valve 21.
It is additionally provided with total overload protection overflow valve 22 on the x mouthfuls of the two logical logical valve 11.
The x mouthfuls of the two logical logical valve 11 are also connected with by third pilot operated directional control valve 23 and stop overflow valve 24, institute
It states third pilot operated directional control valve 23 and is not connected to the stop overflow valve 24, the third pilot operated directional control valve for described x mouthfuls at spring position
23 in control bit the x mouthfuls of connection stop overflow valve 24, the hydraulic control mouth of the third pilot operated directional control valve 23 pass through stop
Solenoid valve 25 is connected to the control oil sources 10, the hydraulic control of the stop solenoid valve 25 third pilot operated directional control valve 23 when must not be electric
Described T1 mouthfuls of mouth connection, the hydraulic control mouth for stopping the third pilot operated directional control valve 23 when solenoid valve 25 obtains electric are connected to the control
Oil sources 10.
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 automatic 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 automatic overload protection valve 8, then enters institute through the balanced valve 4
Hydraulic motor 5 is stated to drive the winch 7 to rise, the oil return of the hydraulic motor 5 is through the reversal valve 2 and described automatic
Overload protection valve 8 flows back to fuel tank, and the solenoid directional control valve 13 and the repairing solenoid valve 18 must not be electric, is protected in the automatic 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 automatic overload protection valve 8,
Subsequently into the hydraulic motor 5 to drive the winch 7 to decline, the oil return of the hydraulic motor 5 is through 4 He of the balanced valve
The reversal valve 2 and the automatic overload protection valve 8 flow back to fuel tank, the solenoid directional control valve 13 and the repairing solenoid valve 18
Must not be electric, inside the automatic 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：When the pulling force sensor on the steel wire rope of the winch 7 detects that pulling force is more than predetermined
It when value, controls the reversal valve 2 and switches to lower decrease, control the solenoid directional control valve 13 and the repairing solenoid valve 18 must be electric,
Inside the automatic overload protection valve 8, described x mouthfuls is connected to the automatic overload protection overflow valve through the solenoid directional control valve 13
14, described C3 mouthfuls is connected to the control oil sources 10 through described C1 mouthfuls, and first pilot operated directional control valve 15 and second hydraulic control are changed
It is in control bit to valve 20, the logical valve 19 is in cut-off position, and the pressure reducing valve 16 is connected to the repairing oil sources 9, described
The liberation port of control mouth and the brake 6 that the pressure oil for controlling oil sources 10 enters the balanced valve 4 through described C3 mouthfuls, will be described
Balanced valve 4 and the brake 6 are opened, and the winch 7 can passively decline under the effect of external force at this time；
Further include identical tension pattern, in ascending fashion, controls the solenoid directional control valve 13 so that described in the x mouthfuls of connection
Identical tension overflow valve 21, at this time the inlet pressure of the hydraulic motor 5 limited by the identical tension overflow valve 21, the winch 7
The steel wire rope on the tension that keeps constant.
Further include landing pattern, in ascending fashion, controls the stop solenoid valve 25 so that stopping described in the x mouthfuls of connection
By overflow valve 24, the inlet pressure of the hydraulic motor 5 is limited by the stop overflow valve 24 at this time, for the winch 7
The suspender is stopped.
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 automatic overload protective device, including hydraulic pump（1）, reversal valve（2）, safety valve（3）, balanced valve（4）, hydraulic pressure horse
It reaches（5）, brake（6）, winch（7）And fuel tank, the fuel tank, the hydraulic pump（1）, the reversal valve（2）With the hydraulic pressure horse
It reaches（5）Form open circuit, the hydraulic pump（1）Oil outlet be equipped with safety valve（3）, the hydraulic motor（5）Described in driving
Winch（7）, the hydraulic motor（5）The corresponding winch（7）The hydraulic fluid port of vertical motion is equipped with the balanced valve（4）, described
Winch（7）It is equipped with the brake（6）, the winch（7）It is tied with steel wire rope and is equipped with suspender, the steel wire rope is equipped with pulling force
Sensor, it is characterised in that：Further include being arranged in the hydraulic pump（1）With the reversal valve（2）Between automatic overload protection
Valve（8）, repairing oil sources（9）With control oil sources（10）, the automatic overload protection valve（8）Hydraulic fluid port include P mouthfuls, T mouthfuls, A mouthfuls, B
Mouthful, T1 mouthfuls, C1 mouthfuls, C2 mouthfuls and C3 mouthfuls, described P mouthfuls is connected to A mouthfuls, and two logical logical valves are provided between described A mouthfuls and B mouthful
（11）, the two logical logical valve（11）Hydraulic fluid port include a mouthfuls, b mouthfuls and x mouthfuls, described A mouthfuls is connected to described a mouthfuls, described B mouthfuls with
The b mouthfuls of connection, described A mouthfuls and described B mouthfuls also passes through the first check valve respectively（12）It is connected to x mouthfuls described, the two logical logic
Valve（11）The x mouthfuls pass through solenoid directional control valve（13）Equipped with automatic overload protection overflow valve（14）, the solenoid directional control valve
（13）The x mouthfuls of cut-off, the solenoid directional control valve when must not be electric（13）The x mouthfuls of connection automatic overload protection overflows when obtaining electric
Flow valve（14）, the automatic overload protection valve（8）The C2 mouthfuls and it is P mouthfuls described between successively be equipped with the first pilot operated directional control valve
（15）, pressure reducing valve（16）With the second check valve（17）, first pilot operated directional control 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 bit make the pressure reducing valve（16）Entrance connect
It is described C2 mouthfuls logical, the automatic overload protection valve（8）The T mouthfuls and it is B mouthfuls described between be equipped with logical valve（19）, the logic
Valve（19）Control port pass through the second pilot operated directional control valve（20）It is connected to T1 mouthfuls described, second pilot operated directional control valve（20）Bullet
Spring position makes the logical valve（19）Control port connection it is described T1 mouthfuls, second pilot operated directional control valve（20）Control bit make institute
State logical valve（19）Control port cut-off, first pilot operated directional control valve（15）Hydraulic control mouth and second pilot operated directional control valve
（20）Hydraulic control mouth connection it is described C3 mouthfuls, described C3 mouthfuls passes through repairing solenoid valve（18）It is connected to C1 mouthfuls described, the repairing electromagnetism
Valve（18）Described T1 mouthfuls of the C3 mouthfuls of connection, the repairing solenoid valve when must not be electric（18）C3 mouthfuls of connection C1 when obtaining electric
Mouthful, the logical valve（19）When its control port ends in cut-off position, in its control port draining in connection position, institute
State automatic overload protection valve（8）The P mouthfuls of connection hydraulic pumps（1）Oil outlet, described T mouthfuls be connected to institute with described T1 mouthfuls
State fuel tank, the A mouthfuls of connection reversal valve（2）Oil inlet, the B mouthfuls of connection reversal valve（2）Oil return opening, it is described
The C1 mouthfuls of connection control oil sources（10）, the C2 mouthfuls of connection repairing oil sources（9）, the C3 mouthfuls of connection balanced valve
（4）Control mouth and the brake（6）Liberation port.
2. a kind of automatic overload protective device according to claim 1, it is characterised in that：The solenoid directional control valve（13）For
Three-position four-way electromagnetic directional valve, wherein position are y-function, and oil inlet is connected to the two logical logical valve（11）The x mouthfuls, institute
State solenoid directional control valve（13）An actuator port be equipped with the automatic overload protection overflow valve（14）, the solenoid directional control valve
（13）Another actuator port be equipped with identical tension overflow valve（21）.
3. a kind of automatic overload protective device according to claim 1, it is characterised in that：The two logical logical valve（11）'s
Total overload protection overflow valve is additionally provided on x mouthfuls described（22）.
4. a kind of automatic overload protective device according to claim 1, which is characterized in that the two logical logical valve（11）'s
Described x mouthfuls also passes through third pilot operated directional control valve（23）It is connected with stop overflow valve（24）, the third pilot operated directional control valve（23）
It is not connected to the stop overflow valve for described x mouthfuls when spring position（24）, the third pilot operated directional control valve（23）The x in control bit
Mouth is connected to the stop overflow valve（24）, the third pilot operated directional control valve（23）Hydraulic control mouth pass through stop solenoid valve（25）Connection
The control oil sources（10）, the stop solenoid valve（25）Third pilot operated directional control valve when must not be electric（23）Hydraulic control mouth connection
It is T1 mouthfuls described, the stop solenoid valve（25）Third pilot operated directional control valve when obtaining electric（23）Hydraulic control mouth to be connected to the control oily
Source（10）.
5. a kind of automatic overload protective device according to claim 1, which is characterized in that the brake（6）Setting is in institute
State winch（7）Driving input terminal, the brake（6）With holdback, the winch（7）When vertical motion, the brake（6）
It need not open, the winch（7）When lowering action, the brake（6）It needs to open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721797256.5U CN207632397U (en) | 2017-12-21 | 2017-12-21 | Automatic overload protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721797256.5U CN207632397U (en) | 2017-12-21 | 2017-12-21 | Automatic overload protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207632397U true CN207632397U (en) | 2018-07-20 |
Family
ID=62853224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721797256.5U Withdrawn - After Issue CN207632397U (en) | 2017-12-21 | 2017-12-21 | Automatic overload protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207632397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986180A (en) * | 2017-12-21 | 2018-05-04 | 青岛天时海洋石油装备有限公司 | Automatic overload protective device and its method of work |
-
2017
- 2017-12-21 CN CN201721797256.5U patent/CN207632397U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986180A (en) * | 2017-12-21 | 2018-05-04 | 青岛天时海洋石油装备有限公司 | Automatic overload protective device and its method of work |
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