CN211288292U - Hydraulic load locking protection system - Google Patents
Hydraulic load locking protection system Download PDFInfo
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- CN211288292U CN211288292U CN201921627504.0U CN201921627504U CN211288292U CN 211288292 U CN211288292 U CN 211288292U CN 201921627504 U CN201921627504 U CN 201921627504U CN 211288292 U CN211288292 U CN 211288292U
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Abstract
The utility model discloses a hydraulic load locking protection system, which comprises an oil outlet pipe, a hydraulic motor, a flow controller, a hydraulic control one-way valve, a direction controller and an oil return pipe; the flow controller is used for controlling the flow of the hydraulic oil; the hydraulic control one-way valve is used for controlling hydraulic oil to flow in a single direction; the direction controller is used for controlling the flowing direction of the hydraulic oil; the direction controller is respectively connected with the oil outlet pipe, the hydraulic motor and the oil return pipe, the direction controller is connected with the hydraulic motor through the flow controller, and two direction controllers are arranged on an oil circuit which is connected with the oil outlet pipe and is connected with the hydraulic motor. The utility model discloses a set up two direction controller and distinguish area year parking stall and no-load parking stall on hydraulic motor and the oil circuit of going out oil pipe connection, guarantee that actuating mechanism does not take place violent action because of leaking in the hydraulic motor when area year parking stall, improved the operational aspect of equipment.
Description
Technical Field
The utility model relates to a rolling mill tilting mechanism's oil circuit structure, concretely relates to hydraulic pressure load locking protection system.
Background
A bar mill with constant rolling center line is characterized in that a vertical mill needs to be turned over to be on the upper line and the lower line according to process requirements, a turning platform is driven by a gear and a circular rack driven by a hydraulic motor, and a J6K series cycloid type motor is selected as a hydraulic motor body.
Fig. 1 is a working schematic diagram of an oil circuit of a conventional rolling mill turnover mechanism, and a load protection oil circuit is used for protecting the turnover mechanism by taking a Y-shaped three-position four-way reversing valve and a double-hydraulic control one-way valve as load locking. Under the condition of load, the Y-shaped electromagnetic directional valve is in a middle position, the A, B output oil path is communicated with the oil return pipe, and the oil path between the double hydraulic control one-way valves is in a pressure relief state, so that the double hydraulic control one-way valves are guaranteed to control the oil path to be unloaded, and the double hydraulic control one-way valves are normally closed. In this case, if a single oil path from the valve table to the motor leaks, since the cycloid type motor is actuated by the volume change of the oil inlet cavity and the oil outlet cavity, the single oil cavity leaks, and the other cavity is still in a closed state, thereby ensuring that the load does not act. However, the sealing performance of the cycloid type motor is poor, a channel is formed inside the cycloid type motor after the cavity is abraded, the motor body leaks inwards, and after one tooth is deflected, the volume of the oil inlet cavity and the oil outlet cavity is greatly changed, so that the turnover mechanism is violently operated.
Disclosure of Invention
The purpose of the invention is as follows: an object of the utility model is to provide a can distinguish area and carry parking stall and no-load parking stall, avoid letting out the hydraulic load locking protection system who causes the violent action of upset platform in because of the motor.
The technical scheme is as follows: the utility model discloses a hydraulic load locking protection system, which comprises an oil outlet pipe, a hydraulic motor, a flow controller, a hydraulic control one-way valve, a direction controller and an oil return pipe; the flow controller is used for controlling the flow of the hydraulic oil; the hydraulic control one-way valve is used for controlling hydraulic oil to flow in a single direction; the direction controller is used for controlling the flowing direction of the hydraulic oil; the direction controller is respectively connected with the oil outlet pipe, the hydraulic motor and the oil return pipe, the direction controller is connected with the hydraulic motor through the flow controller, and two direction controllers are arranged on an oil way of the hydraulic motor connected with the oil outlet pipe.
The direction controller is an electromagnetic directional valve and can control the flowing direction of the hydraulic oil.
The electromagnetic reversing valve connected with the oil outlet pipe, the hydraulic motor and the oil return pipe is a Y-shaped electromagnetic reversing valve, and the Y-shaped electromagnetic reversing valve can control the flowing direction of hydraulic oil.
Two direction controllers on an oil circuit connected with the hydraulic motor and the oil outlet pipe are a Y-shaped electromagnetic directional valve and a two-position four-way electromagnetic directional valve, the Y-shaped electromagnetic directional valve is connected with the oil outlet pipe through the two-position four-way electromagnetic directional valve, and the loaded parking space and the unloaded parking space are distinguished by controlling the two electromagnetic directional valves, so that violent movement of the overturning platform due to internal leakage of the motor is avoided.
The Y-shaped electromagnetic directional valve is connected with the flow controller through a hydraulic control one-way valve, and hydraulic oil flows in a single direction due to the hydraulic control one-way valve.
The hydraulic control one-way valve is a double hydraulic control one-way valve.
The flow controller is a one-way throttle valve group which can control the flow of the hydraulic oil.
The one-way throttle valve group comprises two one-way throttle valves.
Has the advantages that: compared with the prior art, the utility model, beneficial effect lies in: (1) the parking device can distinguish a loaded parking space from an unloaded parking space, and ensures that the executing mechanism does not generate violent action due to internal leakage of the motor when the loaded parking space exists; (2) when the motor leaks, the pressure difference and the load of the two cavities are ensured to be in a balanced state, and the load at the tail end of the oil way is protected; (3) the running condition of the equipment is improved, and the requirements of the production process are met.
Drawings
FIG. 1 is a schematic diagram of the operation of an oil circuit of a turnover mechanism of a rolling mill in the prior art;
FIG. 2 is a schematic diagram of the hydraulic load lock protection system of the present invention;
fig. 3 is a schematic diagram of the structure of the motor.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and the accompanying drawings.
As shown in fig. 2, the hydraulic load locking protection system of the present invention comprises an oil outlet pipe P, a direction controller, a hydraulic control one-way valve 3, a flow controller 2, a hydraulic motor 1 and an oil return pipe T; the flow controller 2 is used for controlling the flow of hydraulic oil; in this embodiment, the flow controller 2 is a one-way throttle valve set composed of two one-way throttle valves; the hydraulic control check valve 3 is used for controlling hydraulic oil to flow in a single direction, and in the embodiment, the hydraulic control check valve 4 is a double hydraulic control check valve; the direction controller is used for controlling the flowing direction of the hydraulic oil; the direction controller is connected with an oil outlet pipe P, a hydraulic motor 1 and an oil return pipe T respectively, the direction controller is connected with the hydraulic motor 1 through a flow controller 2, in the embodiment, the direction controller connected with the oil outlet pipe P, the hydraulic motor 1 and the oil return pipe T is a Y-shaped electromagnetic directional valve 4, the two direction controllers on an oil path connected with the oil outlet pipe P of the hydraulic motor 1 are the Y-shaped electromagnetic directional valve 4 and a two-position four-way electromagnetic directional valve 5, and the Y-shaped electromagnetic directional valve 4 is connected with the oil outlet pipe P through the two-position four-way electromagnetic directional valve 5.
As shown in fig. 2 and fig. 3, under normal operation, the electromagnetic coil a1(a2) of the Y-shaped electromagnetic directional valve 5 is energized, the double hydraulic control one-way valve is opened, hydraulic oil passes through the Y-shaped electromagnetic directional valve 5, the double hydraulic control one-way valve and the one-way throttle valve set from the oil outlet pipe P in sequence and enters the hydraulic motor 1, at this time, the oil inlet chamber a of the hydraulic motor 1 is in an oil supply state, the volume change of the internal oil chamber drives the actuating member to move, and the oil return chamber b of the hydraulic motor 1 forms a passage to the oil return pipe T to complete oil return.
When the hydraulic motor is stopped (including the loaded stop action under the conditions of forward rotation and reverse rotation of the hydraulic motor 1), the B1 electromagnetic coil of the two-position four-way electromagnetic directional valve 5 is electrified so as to work at the right position, the A1(A2) electromagnetic coil of the Y-shaped electromagnetic directional valve 4 is continuously kept in an electrified state, an oil path entering the oil inlet cavity a of the hydraulic motor 1 and an oil outlet pipe P are kept in a passage at the moment, the oil path from the oil return cavity B of the hydraulic motor 1 to the oil return pipe T is blocked, and the pressure difference and the load of the oil paths at two sides are kept in. Compared with a circuit before improvement, if a single oil path from the oil inlet end of the valve table to the hydraulic motor 1 leaks, accidents are caused because the load is easy to overturn due to the parking action with load. The two-position four-way electromagnetic reversing valve 3 is added on the oil return pipe T to ensure that an oil return cavity b of the hydraulic motor 1 is blocked from the oil return pipe T, and the oil way of the section is in a closed state, so that the oil inlet cavity a of the hydraulic motor 1 keeps oil supply pressure, and further, the load is ensured not to act. When the motor is subjected to internal leakage, the pressure of the oil inlet cavity a of the hydraulic motor 1 can be maintained all the time, the pressure difference between the two cavities and the load are ensured to be in a balanced state, the load at the tail end of the oil way is protected, and pressure loss caused by leakage is avoided.
According to the control method, under the condition that original pipeline arrangement and valve blocks are utilized as far as possible, the two-position four-way electromagnetic reversing valve 5 is additionally arranged on the oil return before the original Y-shaped electromagnetic reversing valve 4, the loaded parking space and the no-load parking space are distinguished from control, violent action of a turnover platform due to internal leakage of a motor is avoided, the running condition of equipment is improved, and the production process is met. Under the emergency conditions of single oil way leakage or motor internal leakage and the like, the stability of the actuating mechanism can be ensured, and the use requirement of equipment is met.
Claims (8)
1. A hydraulic load locking protection system comprises an oil outlet pipe, a hydraulic motor (1), a flow controller (2), a hydraulic control one-way valve (3), a direction controller and an oil return pipe; the flow controller (2) is used for controlling the flow of hydraulic oil; the hydraulic control one-way valve (3) is used for controlling hydraulic oil to flow towards a single direction; the direction controller is used for controlling the flowing direction of the hydraulic oil; the direction controller is connected with play oil pipe, hydraulic motor (1) and oil return pipe respectively, and the direction controller passes through flow controller (2) and is connected its characterized in that with hydraulic motor (1): and an oil path for connecting the hydraulic motor (1) and the oil outlet pipe is provided with two direction controllers.
2. The hydraulic load lock protection system of claim 1, wherein: the direction controller is an electromagnetic directional valve.
3. The hydraulic load lock protection system of claim 2, wherein: the electromagnetic reversing valve connected with the oil outlet pipe, the hydraulic motor (1) and the oil return pipe is a Y-shaped electromagnetic reversing valve (4).
4. The hydraulic load lock protection system of claim 2, wherein: two direction controllers on an oil path connected with the oil outlet pipe by the hydraulic motor (1) are a Y-shaped electromagnetic directional valve (4) and a two-position four-way electromagnetic directional valve (5), and the Y-shaped electromagnetic directional valve (4) is connected with the oil outlet pipe by the two-position four-way electromagnetic directional valve (5).
5. The hydraulic load lock protection system of claim 3, wherein: the Y-shaped electromagnetic directional valve (4) is connected with the flow controller (2) through a hydraulic control one-way valve (3).
6. The hydraulic load lock protection system according to any one of claims 1 to 5, wherein: the hydraulic control one-way valve (3) is a double hydraulic control one-way valve.
7. The hydraulic load lock protection system according to any one of claims 1 to 5, wherein: the flow controller (2) is a one-way throttle valve group.
8. The hydraulic load lock protection system of claim 7, wherein: the one-way throttle valve group comprises two one-way throttle valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627504.0U CN211288292U (en) | 2019-09-27 | 2019-09-27 | Hydraulic load locking protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627504.0U CN211288292U (en) | 2019-09-27 | 2019-09-27 | Hydraulic load locking protection system |
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| Publication Number | Publication Date |
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| CN211288292U true CN211288292U (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921627504.0U Active CN211288292U (en) | 2019-09-27 | 2019-09-27 | Hydraulic load locking protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151184A1 (en) * | 2022-02-10 | 2023-08-17 | 长鑫存储技术有限公司 | Air pressure balance valve, air pressure balance method, and load lock chamber |
-
2019
- 2019-09-27 CN CN201921627504.0U patent/CN211288292U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151184A1 (en) * | 2022-02-10 | 2023-08-17 | 长鑫存储技术有限公司 | Air pressure balance valve, air pressure balance method, and load lock chamber |
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