CN114215798A - Hydraulic system for protecting winch - Google Patents
Hydraulic system for protecting winch Download PDFInfo
- Publication number
- CN114215798A CN114215798A CN202111435610.0A CN202111435610A CN114215798A CN 114215798 A CN114215798 A CN 114215798A CN 202111435610 A CN202111435610 A CN 202111435610A CN 114215798 A CN114215798 A CN 114215798A
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- CN
- China
- Prior art keywords
- valve
- hydraulic control
- winch
- reversing valve
- hydraulic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/08—Driving gear incorporating fluid motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
- B66D1/58—Safety gear responsive to excess of load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention provides a hydraulic system for protecting a winch, which comprises an oil tank, an output valve bank, an upper limiting valve bank, an overload valve bank and a regulating valve bank, wherein the regulating valve bank comprises a hydraulic control reversing valve and a regulating shuttle valve; the end A of the hydraulic control reversing valve is connected with the output valve bank, the end T of the hydraulic control reversing valve is connected with the oil tank, and the end B of the hydraulic control reversing valve is normally closed; the three-way valve is also connected with an upper limit valve group; through the arrangement, the hydraulic control one-way valve is used for realizing automatic oil discharge during lifting limit and overload of the winch, so that the safety problem of the winch during working is ensured.
Description
Technical Field
The invention relates to the technical field of winch safety, in particular to a hydraulic system for protecting a winch.
Background
The ocean crane is one of the main equipment on the offshore platform, mainly used for lifting equipment and receiving and delivering staff, and because the ocean climate and the environment are complicated, the crane working environment is abominable, requires the crane to have high security performance, and the crane disposes multiple safety protection function, under normal condition, can not appear the serious overload condition during operation. However, some unexpected situations may occur, such as the supply vessel moving with the hook winding or the large sea wave, which causes the load to increase rapidly, the operator is not in time to respond, and if no protection measures are taken, the crane may be dragged down, even causing serious consequences of the death of the man.
In the existing hydraulic winch, the working principle is that when a limit collision block touches a rocker of a limit switch, the limit and the switch are switched to be an open circuit (or a passage) when the limit collision block is originally in the open circuit (or the open circuit), and the on-off of the limit switch controls the power on or the power off of an electromagnetic valve of a hydraulic system, so that the pressure oil is controlled to be unloaded, the hydraulic oil return tank of the whole hydraulic system is controlled, and the purpose of stopping the working of a working circuit of the winch is achieved.
Disclosure of Invention
The invention provides a hydraulic system for protecting a winch, which can protect the winch from automatically stopping when a driving cable is lifted to an upper limit position or is overloaded, thereby reducing the occurrence of winch accidents.
In order to achieve the purpose, the technical scheme of the invention is as follows: a hydraulic system for protecting a winch comprises an oil tank, an output valve bank, an upper limiting valve bank, an overload valve bank and a regulating valve bank, wherein the regulating valve bank comprises a hydraulic control reversing valve and a regulating shuttle valve; the end A of the hydraulic control reversing valve is connected with the output valve bank, the end T of the hydraulic control reversing valve is connected with the oil tank, and the end B of the hydraulic control reversing valve is normally closed; the three-way valve is also connected with an upper limit valve group.
The upper limiting valve group comprises a roller reversing valve, the P end of the roller reversing valve is connected with a three-way valve, the T end of the roller reversing valve is connected with an oil tank, the B end of the roller reversing valve is connected with the other end of the adjusting shuttle valve, and the A end of the roller reversing valve is normally closed.
The overload valve group comprises an overload sequence valve, one end of the overload sequence valve is connected with the output valve group, and the other end of the overload sequence valve is connected with the third end of the regulating shuttle valve.
According to the structure, when the winch works, the multi-way valve outputs hydraulic oil to the output valve group for lifting, when the winch lifts to an upper limit position, the roller reversing valve is reversed, so that the P end of the roller reversing valve is communicated with the B end, therefore, the multi-way valve conveys the hydraulic oil to flow to the adjusting shuttle valve through the roller reversing valve to open the other end of the adjusting shuttle valve, the hydraulic oil can flow to a control port of the hydraulic control reversing valve through one end of the adjusting shuttle valve, the hydraulic control reversing valve is controlled to reverse through the hydraulic oil, the A end of the hydraulic control reversing valve is communicated with the T end, and therefore, the hydraulic oil flowing to the output valve group can flow back to the oil tank through the hydraulic control reversing valve to realize oil unloading, so that the winch stops lifting; thereby protecting the hoisting of the winch from exceeding the upper limit; when the winch rises to exceed a preset pressure value of the overload sequence valve, the overload sequence valve is started, so that part of hydraulic oil flowing to the output valve group flows to the regulating shuttle valve through the overload sequence valve to open the third end of the regulating shuttle valve, the hydraulic oil can flow to the control port of the hydraulic control reversing valve through one end of the regulating shuttle valve, and then the hydraulic control reversing valve is controlled to reverse through the hydraulic oil, so that the end A of the hydraulic control reversing valve is communicated with the end T, therefore, the hydraulic oil flowing to the output valve group can flow back to the oil tank through the hydraulic control reversing valve to realize oil discharge, the winch cannot rise when being overloaded, and the problem of potential safety hazard when being overloaded and rising is avoided; through the arrangement, the hydraulic control one-way valve is used for realizing automatic oil discharge during lifting limit and overload of the winch, so that the safety problem of the winch during working is ensured.
Furthermore, the P end of liquid accuse check valve is connected to the one end of three-way valve, the other end intercommunication multiple unit valve of three-way valve, the gyro wheel switching-over valve is connected to the third end of three-way valve, sets up from this for the multiple unit valve only needs an oil circuit can guarantee the hydraulic oil output of output valves and gyro wheel switching-over valve, and simple and convenient and save material.
Furthermore, the output valve group comprises a winch motor and a balance valve group, one end of the winch motor is connected with the end A of the hydraulic control reversing valve, the other end of the hydraulic motor is connected with the multi-way valve, the balance valve group is arranged between the winch motor and the hydraulic control reversing valve, an oil discharging port of the winch motor is connected with an oil tank, one end of the winch motor is further connected with the overload sequence valve, and therefore the winch motor is used for lifting the mooring rope.
Further, balanced valves includes balanced check valve and balanced relief pressure valve, the A end of pilot operated directional control valve is connected to the one end of balanced relief pressure valve, the winch motor is connected to the other end of balanced relief pressure valve, the one end of balanced relief pressure valve is connected to the one end of balanced check valve, and the other end of balanced relief pressure valve is connected to the other end of balanced check valve, sets up from this, and through the effect of balanced valves, it is steady to have guaranteed that the hydraulic oil pressure of multiple unit valve flow direction winch motor is steady, solves the pressure of hydraulic oil unstable and leads to the winch motor to rise unusual problem.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system for protecting a drawworks of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a hydraulic system for protecting a winch comprises an oil tank 1, an output valve group 2, an upper limiting valve group, an overload valve group and a regulating valve group 5, wherein the regulating valve group 5 comprises a hydraulic control reversing valve 51 and a regulating shuttle valve 52, the P end of the hydraulic control reversing valve 51 is connected with a multi-way valve 7 through a three-way valve 6, and a control port X of the hydraulic control reversing valve 51 is connected with one end 521 of the regulating shuttle valve 52; the end A of the hydraulic control reversing valve 51 is connected with the output valve group 2, the end T of the hydraulic control reversing valve 51 is connected with the oil tank 1, and the end B of the hydraulic control reversing valve 51 is normally closed; the three-way valve 6 is also connected with an upper limit valve group.
The upper limiting valve group comprises a roller reversing valve 3, the P end of the roller reversing valve 3 is connected with a three-way valve 6, the T end of the roller reversing valve 3 is connected with the oil tank 1, the B end of the roller reversing valve 3 is connected with the other end 522 of the adjusting shuttle valve 52, and the A end of the roller reversing valve 3 is normally closed.
The overload valve group comprises an overload sequence valve 4, one end of the overload sequence valve 4 is connected with the output valve group 2, and the other end of the overload sequence valve 4 is connected with the third end 523 of the regulating shuttle valve 52.
In this embodiment, the overload sequence valve 4 sets a pressure value that is 1.1 times of the pressure of the hydraulic oil flowing to the output valve set 2 under normal conditions of the multi-way valve 7, when the winch lifts a cargo, if the weight of the cargo is too heavy, the load of the winch is likely to increase rapidly, at this time, in order to lift the cargo, the pressure of the hydraulic oil flowing to the output valve set 2 by the multi-way valve 7 is increased, and when the pressure of the hydraulic oil exceeds the pressure value set by the overload sequence valve 4, the overload sequence valve 4 can be opened, and the hydraulic control reversing valve 51 is controlled to reverse to drain the oil.
In the structure, when the winch works, the multi-way valve 7 outputs hydraulic oil to the output valve group 2 to perform lifting work, when the winch lifts to an upper limit position, the roller reversing valve 3 reverses to enable the P end of the roller reversing valve 3 to be communicated with the B end, therefore, the multi-way valve 7 conveys the hydraulic oil to the adjusting shuttle valve 52 through the roller reversing valve 3 to open the other end 522 of the adjusting shuttle valve, the hydraulic oil can flow to the control port X of the hydraulic control reversing valve 51 through one end 521 of the adjusting shuttle valve 52, the hydraulic oil controls the hydraulic control reversing valve 51 to reverse, the A end of the hydraulic control reversing valve 51 is communicated with the T end, and therefore, the hydraulic oil flowing to the output valve group 2 can flow back to the oil tank 1 through the hydraulic control reversing valve 51 to realize oil discharge, and the winch stops lifting work; thereby protecting the lifting of the winch from exceeding the upper limit.
When the winch rises and exceeds the preset pressure value of the overload sequence valve 4, the overload sequence valve 4 is started, so that part of hydraulic oil flowing to the output valve group 2 flows to the regulating shuttle valve 52 through the overload sequence valve 4 to open the third end 523 of the regulating shuttle valve 52, the hydraulic oil can flow to the control port X of the hydraulic control reversing valve 51 through one end 521 of the regulating shuttle valve 52, the hydraulic control reversing valve 51 is controlled to reverse through the hydraulic oil, the end A of the hydraulic control reversing valve 51 is communicated with the end T, therefore, the hydraulic oil flowing to the output valve group 2 can flow back to the oil tank 1 through the hydraulic control reversing valve 51 to realize oil unloading, the winch cannot rise when being overloaded, and the problem of potential safety hazard when being overloaded and rising is avoided; through the arrangement, the hydraulic control one-way valve 2 is used for realizing automatic oil discharge during lifting limit and overload of the winch, so that the safety problem of the winch during working is ensured.
The P end of hydraulic control check valve 51 is connected to the one end of three-way valve 6, the other end of three-way valve 6 communicates multiple unit valve 7, gyro wheel switching-over valve 3 is connected to the third end of three-way valve 6, sets up from this for the hydraulic oil output of output valves 2 and gyro wheel switching-over valve can be guaranteed to multiple unit valve 7 only need an oil circuit, and is simple and convenient and save material.
The output valve group 2 comprises a winch motor 21 and a balance valve group 22, one end of the winch motor 21 is connected with the end A of a hydraulic control reversing valve 51, the other end of the winch motor is connected with a multi-way valve 7, the balance valve group 22 is arranged between the winch motor 21 and the hydraulic control reversing valve 51, an oil discharging port 211 of the winch motor 21 is connected with an oil tank 1, one end of the winch motor 21 is further connected with an overload sequence valve 4, and therefore the winch motor is used for lifting a cable.
In this embodiment, the multi-way valve group 7 is a control valve group between the oil tank 1 and the output valve group 2, the control valve group is composed of common reversing valves, and the winch motor is controlled to rotate forward or backward by the reversing valves to realize lifting and lowering of the cable.
In the present embodiment, the multi-way valve group 7 is provided with a lifting port 71 and a descending port 72, the lifting port 71 is connected with one end of the winch motor 21 through the hydraulic control reversing valve 51, and the descending port 72 is connected with the other end of the winch motor 21; therefore, when the cable needs to be lifted, hydraulic oil flows to one end of the winch motor 21 from the lifting port 71, and then flows back to the oil tank 1 from the oil discharge port 211 of the winch motor 21 so that the hydraulic oil circularly flows to realize the lifting action of the winch; when the cable needs to be lowered, hydraulic oil flows from the lowering port 72 to the other end of the winch motor 21, and then flows back to the oil tank 1 from the oil discharge port 211 of the winch motor 21, so that the hydraulic oil circulates to realize the lowering of the winch.
The balance valve group 22 comprises a balance check valve 221 and a balance pressure reducing valve 222, one end of the balance pressure reducing valve 222 is connected with the end A of the hydraulic control reversing valve 51, the other end of the balance pressure reducing valve 222 is connected with the winch motor 21, one end of the balance check valve 221 is connected with one end of the balance pressure reducing valve 222, and the other end of the balance check valve 221 is connected with the other end of the balance pressure reducing valve 222.
Claims (4)
1. A hydraulic system for protecting a winch is characterized in that: the regulating valve group comprises a hydraulic control reversing valve and a regulating shuttle valve, wherein the P end of the hydraulic control reversing valve is connected with the multi-way valve through a three-way valve, and the control port of the hydraulic control reversing valve is connected with one end of the regulating shuttle valve; the end A of the hydraulic control reversing valve is connected with the output valve bank, the end T of the hydraulic control reversing valve is connected with the oil tank, and the end B of the hydraulic control reversing valve is normally closed; the three-way valve is also connected with an upper limit valve group;
the upper limiting valve group comprises a roller reversing valve, the P end of the roller reversing valve is connected with a three-way valve, the T end of the roller reversing valve is connected with an oil tank, the B end of the roller reversing valve is connected with the other end of the regulating shuttle valve, and the A end of the roller reversing valve is normally closed;
the overload valve group comprises an overload sequence valve, one end of the overload sequence valve is connected with the output valve group, and the other end of the overload sequence valve is connected with the third end of the regulating shuttle valve.
2. The hydraulic system for protecting a drawworks as claimed in claim 1, wherein: one end of the three-way valve is connected with the P end of the hydraulic control one-way valve, the other end of the three-way valve is communicated with the multi-way valve, and the third end of the three-way valve is connected with the roller reversing valve.
3. The hydraulic system for protecting a drawworks as claimed in claim 1, wherein: the output valve group comprises a winch motor and a balance valve group, one end of the winch motor is connected with the end A of the hydraulic control reversing valve, the other end of the winch motor is connected with the multi-way valve, the balance valve group is arranged between the winch motor and the hydraulic control reversing valve, an oil discharging port of the winch motor is connected with an oil tank, and one end of the winch motor is further connected with the overload sequence valve.
4. The hydraulic system for protecting a drawworks as claimed in claim 3, wherein: the balanced valve group includes balanced check valve and balanced relief pressure valve, the A end of pilot operated directional control valve is connected to the one end of balanced relief pressure valve, the winch motor is connected to the other end of balanced relief pressure valve, the one end of balanced relief pressure valve is connected to the one end of balanced check valve, and the other end of balanced relief pressure valve is connected to the other end of balanced check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111435610.0A CN114215798A (en) | 2021-11-29 | 2021-11-29 | Hydraulic system for protecting winch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111435610.0A CN114215798A (en) | 2021-11-29 | 2021-11-29 | Hydraulic system for protecting winch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114215798A true CN114215798A (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111435610.0A Pending CN114215798A (en) | 2021-11-29 | 2021-11-29 | Hydraulic system for protecting winch |
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| CN (1) | CN114215798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212719A (en) * | 2021-11-29 | 2022-03-22 | 中船华南船舶机械有限公司 | Control method for protecting hydraulic system of winch |
-
2021
- 2021-11-29 CN CN202111435610.0A patent/CN114215798A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212719A (en) * | 2021-11-29 | 2022-03-22 | 中船华南船舶机械有限公司 | Control method for protecting hydraulic system of winch |
| CN114212719B (en) * | 2021-11-29 | 2024-04-19 | 中船华南船舶机械有限公司 | Control method of hydraulic system of protection winch |
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