CN214141356U - Brake valve - Google Patents
Brake valve Download PDFInfo
- Publication number
- CN214141356U CN214141356U CN202022645132.3U CN202022645132U CN214141356U CN 214141356 U CN214141356 U CN 214141356U CN 202022645132 U CN202022645132 U CN 202022645132U CN 214141356 U CN214141356 U CN 214141356U
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- Prior art keywords
- valve
- oil
- brake
- hydraulic
- oil inlet
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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.)
- Expired - Fee Related
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- 239000012530 fluid Substances 0.000 abstract 3
- 239000003921 oil Substances 0.000 description 71
- 239000010720 hydraulic oil Substances 0.000 description 19
- 238000007599 discharging Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model provides a brake valve, including the brake valve main part, the brake valve main part includes the shuttle valve, the relief pressure valve, the switching-over valve surges, the check valve, oil feed A mouth, oil feed B mouth, brake hydraulic fluid port and oil return opening, oil feed A mouth is connected to the first oil inlet of shuttle valve, oil feed B mouth is connected to the second oil inlet of shuttle valve, the oil inlet of relief pressure valve is connected to the oil-out of shuttle valve, the input port of the switching-over valve that surges is connected to the delivery outlet of relief pressure valve, the oil return opening is connected to the oil return opening of relief pressure valve, the brake hydraulic fluid port is connected to the delivery outlet of the switching-over valve that surges, the input port connection of check valve surges is between the switching-over valve and the brake hydraulic fluid port, the delivery outlet of check valve is connected between the oil inlet of relief pressure valve and the oil-out of shuttle valve. The utility model has the advantages of sufficient and stable braking force.
Description
Technical Field
The utility model relates to a hoist machinery, concretely relates to brake valve.
Background
In the traditional crane winch, when the winch acts, in the process that a lifting hook ascends or descends after a brake is loosened, the situation that the brake is opened insufficiently due to insufficient pressure of a brake hydraulic oil way occurs, so that the winch brake shakes, the risk that the winch brake brakes again due to insufficient pressure of the brake hydraulic oil way exists, and once the situation that the brake suddenly occurs in the lifting process of the lifting hook, goods can be unhooked; when the winch stops acting, high-pressure oil in an oil way for lifting or descending the lifting hook needs to be discharged, but when the oil way for lifting or descending the lifting hook discharges the pressure, a certain back pressure exists in a brake oil inlet due to the influence of the back pressure, so that the braking force is reduced.
Disclosure of Invention
The utility model provides a brake force is sufficient, stable brake valve utilizes the utility model discloses a structure when the action of crane winch, provides the opening brake pressure who accords with braking system requirement, when the winch stops, in time unloads brake pressure.
In order to achieve the above purpose, the technical scheme of the utility model is that: a brake valve comprises a brake valve main body, wherein the brake valve main body comprises a shuttle valve, a pressure reducing valve, a hydraulic reversing valve, a one-way valve, an oil inlet A, an oil inlet B, a brake oil port and an oil return port.
The first oil inlet of the shuttle valve is connected with the oil inlet A, the second oil inlet of the shuttle valve is connected with the oil inlet B, the oil outlet of the shuttle valve is connected with the oil inlet of the pressure reducing valve, the output port of the pressure reducing valve is connected with the input port of the hydraulic reversing valve, the oil return port of the pressure reducing valve is connected with the oil return port, the output port of the hydraulic reversing valve is connected with the brake oil port, the input port of the check valve is connected between the hydraulic reversing valve and the brake oil port, and the output port of the check valve is connected between the oil inlet of the pressure reducing valve and the oil outlet of the shuttle valve.
The reversing pressure value set by the hydraulic reversing valve is smaller than the pressure required by the hydraulic brake to be loosened, and the pressure required by the hydraulic brake to be loosened is smaller than the oil supply pressure of the oil inlet A or the oil inlet B.
According to the arrangement, when the brake needs to be opened, hydraulic oil enters the shuttle valve through the oil inlet A or the oil inlet B, the hydraulic oil enters the pressure reducing valve after being output from the shuttle valve, the hydraulic oil after being reduced in pressure by the pressure reducing valve flows to the hydraulic reversing valve, and the control end of the hydraulic reversing valve is communicated with the input end of the hydraulic reversing valve, so that the hydraulic reversing valve can be quickly reversed when the hydraulic oil reaches the hydraulic reversing valve, and after reversing, the hydraulic oil quickly opens the hydraulic brake through the hydraulic reversing valve, and sufficient and quick pressure required by the hydraulic brake system for opening the brake is provided; when the hydraulic brake is needed, the hydraulic oil in the oil inlet A or the oil inlet B is unloaded, the hydraulic reversing valve is reset under the action of the spring, and the hydraulic oil enters the oil return port to unload the hydraulic oil, so that the hydraulic brake is closed; in addition, in order to prevent the hydraulic control reversing valve from being blocked by dirt and being incapable of discharging the brake oil in time, a one-way valve is connected in parallel with a brake port so as to discharge the brake oil when the hydraulic control reversing valve fails, the safety and reliability of braking are ensured, and the oil discharging speed can be increased through the one-way valve even if the hydraulic control reversing valve does not fail, so that the oil discharging efficiency is increased, and the rapid braking is realized. The set reversing pressure value of the hydraulic control reversing valve is small so as to avoid certain backpressure at the brake port due to backpressure influence when the pressure of the oil inlet A or oil inlet B system is relieved, and therefore braking force is reduced.
Furthermore, the hydraulic reversing valve is a two-position four-way hydraulic reversing valve.
Furthermore, an oil return port of the hydraulic reversing valve is connected with an oil return port. Therefore, hydraulic oil in the brake valve main body is convenient to unload.
Furthermore, the pressure of the output port of the pressure reducing valve is greater than the reversing pressure value set by the hydraulic reversing valve, and the pressure reducing valve is arranged above the reversing pressure value to avoid certain backpressure in the oil inlet of the hydraulic brake due to the influence of backpressure when the oil inlet A or the oil inlet B is relieved, so that the braking force is reduced.
Drawings
Fig. 1 is a schematic view of the hydraulic principle 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 brake valve comprises a brake valve main body, wherein the brake valve main body comprises a shuttle valve 1, a pressure reducing valve 2, a hydraulic reversing valve 3, a one-way valve 4, an oil inlet a 5, an oil inlet B6, a brake oil port 7 and an oil return port 8.
The first oil inlet of the shuttle valve 1 is connected with an oil inlet A port 5, the second oil inlet of the shuttle valve 1 is connected with an oil inlet B port 6, the oil outlet of the shuttle valve 1 is connected with the oil inlet of the pressure reducing valve 2, the output port of the pressure reducing valve 2 is connected with the input port of the hydraulic reversing valve 3, the oil return port of the pressure reducing valve 2 is connected with an oil return port 8, the output port of the hydraulic reversing valve 3 is connected with a brake oil port 7, the input port of the check valve 4 is connected between the hydraulic reversing valve 3 and the brake oil port 7, and the output port of the check valve 4 is connected between the oil inlet of the pressure reducing valve 2 and the oil outlet of the shuttle valve 1.
According to the arrangement, when the brake needs to be opened, hydraulic oil enters the shuttle valve through the oil inlet A or the oil inlet B, the hydraulic oil enters the pressure reducing valve after being output from the shuttle valve, the hydraulic oil after being reduced in pressure by the pressure reducing valve flows to the hydraulic reversing valve, and the control end of the hydraulic reversing valve passes through the output end of the pressure reducing valve, so that the hydraulic reversing valve can be quickly reversed when the hydraulic oil flows to the hydraulic reversing valve, the hydraulic brake can be quickly opened by the hydraulic oil through the hydraulic reversing valve, and the pressure required by the hydraulic brake system for opening the brake can be provided quickly enough; when braking is needed, hydraulic oil in the oil inlet A or the oil inlet B is unloaded, the hydraulic reversing valve is reset under the action of the spring, and hydraulic oil for hydraulic braking enters the oil return port from the hydraulic reversing valve 3 so as to be unloaded, so that the hydraulic brake is closed; in addition, in order to prevent the hydraulic control reversing valve from being blocked by dirt and being incapable of discharging the brake oil in time, a one-way valve is connected in parallel with a brake port so as to discharge the brake oil when the hydraulic control reversing valve fails, the safety and reliability of braking are ensured, and the oil discharging speed can be increased through the one-way valve even if the hydraulic control reversing valve does not fail, so that the oil discharging efficiency is increased, and the rapid braking is realized.
The hydraulic reversing valve 3 is a two-position three-way hydraulic reversing valve.
And an oil return port of the hydraulic reversing valve 3 is connected with an oil outlet 8. Therefore, hydraulic oil in the brake valve main body is convenient to unload.
The pressure of the output port of the pressure reducing valve 2 is greater than the reversing pressure value set by the hydraulic reversing valve 3, and the reversing pressure value set by the hydraulic reversing valve 3 is less than the pressure required by the hydraulic brake release. The high-pressure oil of the system is taken from the oil inlet A or the oil inlet B, the pressure required by the hydraulic brake to be loosened is smaller than the pressure of the oil inlet A or the oil inlet B, the pressure required by the hydraulic brake to be loosened is larger than the reversing pressure value set by the hydraulic reversing valve 3, generally speaking, the system pressure is generally 20-30MPa, the pressure required by the hydraulic brake to be loosened is 3-3.8MPa, the pressure reduced by the pressure reducing valve is 4-5MPa, and the reversing pressure value set by the hydraulic reversing valve 3 is 1.3-1.6 MPa.
Claims (4)
1. A brake valve, includes the brake valve main part, its characterized in that: the brake valve main body comprises a shuttle valve, a pressure reducing valve, a hydraulic reversing valve, a one-way valve, an oil inlet A, an oil inlet B, a brake oil port and an oil return port;
a first oil inlet of the shuttle valve is connected with the oil inlet A, a second oil inlet of the shuttle valve is connected with the oil inlet B, an oil outlet of the shuttle valve is connected with an oil inlet of the pressure reducing valve, an output port of the pressure reducing valve is connected with an input port of the hydraulic reversing valve, an oil return port of the pressure reducing valve is connected with an oil return port, an output port of the hydraulic reversing valve is connected with a brake oil port, an input port of the check valve is connected between the hydraulic reversing valve and the brake oil port, and an output port of the check valve is connected between the oil inlet of the pressure reducing valve and the oil outlet of the shuttle valve;
the reversing pressure value set by the hydraulic reversing valve is smaller than the pressure required by the hydraulic brake to be loosened, and the pressure required by the hydraulic brake to be loosened is smaller than the oil supply pressure of the oil inlet A or the oil inlet B.
2. A brake valve according to claim 1, wherein: the hydraulic reversing valve is a two-position four-way hydraulic reversing valve.
3. A brake valve according to claim 2, wherein: and an oil return port of the hydraulic reversing valve is connected with an oil return port.
4. A brake valve according to claim 1, wherein: the pressure of the output port of the pressure reducing valve is larger than the reversing pressure value set by the hydraulic reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022645132.3U CN214141356U (en) | 2020-11-16 | 2020-11-16 | Brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022645132.3U CN214141356U (en) | 2020-11-16 | 2020-11-16 | Brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214141356U true CN214141356U (en) | 2021-09-07 |
Family
ID=77564543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022645132.3U Expired - Fee Related CN214141356U (en) | 2020-11-16 | 2020-11-16 | Brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214141356U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112209275A (en) * | 2020-11-16 | 2021-01-12 | 中船华南船舶机械有限公司 | Brake valve |
| CN115180547A (en) * | 2022-06-08 | 2022-10-14 | 武汉船用机械有限责任公司 | Hydraulic control system for winch |
-
2020
- 2020-11-16 CN CN202022645132.3U patent/CN214141356U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112209275A (en) * | 2020-11-16 | 2021-01-12 | 中船华南船舶机械有限公司 | Brake valve |
| CN112209275B (en) * | 2020-11-16 | 2024-08-02 | 中船华南船舶机械有限公司 | Brake valve |
| CN115180547A (en) * | 2022-06-08 | 2022-10-14 | 武汉船用机械有限责任公司 | Hydraulic control system for winch |
| CN115180547B (en) * | 2022-06-08 | 2024-03-22 | 武汉船用机械有限责任公司 | Hydraulic control system for winch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210907 |