CN202754726U - Jacking hydraulic system of tower crane - Google Patents
Jacking hydraulic system of tower crane Download PDFInfo
- Publication number
- CN202754726U CN202754726U CN 201220249226 CN201220249226U CN202754726U CN 202754726 U CN202754726 U CN 202754726U CN 201220249226 CN201220249226 CN 201220249226 CN 201220249226 U CN201220249226 U CN 201220249226U CN 202754726 U CN202754726 U CN 202754726U
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- CN
- China
- Prior art keywords
- valve
- hydraulic system
- pressure overflow
- overflow valve
- jacking hydraulic
- Prior art date
- 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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- 239000002828 fuel tank Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 1
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Abstract
The utility model discloses a jacking hydraulic system of a tower crane. The system comprises an oil tank, an oil filter, a plunger pump, a motor, a high pressure overflow valve, a hand-directional valve, a low pressure overflow valve and an inner controlled type balance valve. A safety valve is arranged between the high pressure overflow valve and the plunger pump. Compared with the prior art, the safety valve is increased, so that oil can return from the safety valve when the high pressure overflow valve is damaged, and safety performance is improved.
Description
Technical field
The utility model relates to a kind of tower machine hydraulic system, particularly relates to a kind of tower machine jacking hydraulic system.
Background technology
BHS tower crane series jacking hydraulic system is by the driven by motor high pressure pump, converts electric energy to hydraulic energy, drives actuating unit by control elements such as change-over valves, hydraulic actuating cylinder converts mechanical energy to and drives load, the tower cap is risen or decline, increase or reduce standard knot, the circulation of finishing the work.The pressure of common tower machine jacking hydraulic system is low, and BHS tower crane series jacking hydraulic system pressure height is an advantage, but safety performance reduces.
Summary of the invention
The purpose of this utility model provides a kind of tower machine jacking hydraulic system, and safety performance is higher.
For achieving the above object, the technical solution adopted in the utility model is:
Tower machine jacking hydraulic system of the present utility model comprises fuel tank, oil filter, plunger pump, electrical motor, high-pressure overflow valve, hand change over valve, low pressure relief valve and internal control type balance cock, and a safety valve is set between high-pressure overflow valve and plunger pump.
Owing to being provided with safety valve, therefore when high-pressure overflow valve has been broken, can from the safety valve oil return, having improved safety performance.
Description of drawings
Fig. 1 is control principle drawing of the present utility model.
Among the figure: 1, fuel tank, 2, oil filter, 3, plunger pump, 4, electrical motor, 5, safety valve, 6, high-pressure overflow valve, 7, hand change over valve, 8, low pressure relief valve, 9, the internal control type balance cock.
The specific embodiment
The present invention will be described below in conjunction with drawings and Examples.
As shown in Figure 1, tower machine jacking hydraulic system of the present utility model comprises fuel tank 1, oil filter 2, plunger pump 3, electrical motor 4, high-pressure overflow valve 6, hand change over valve 7, low pressure relief valve 8 and internal control type balance cock 9, and a safety valve 5 is set between high-pressure overflow valve 6 and plunger pump 3.
When work, hand change over valve 7 is in (left position) hoisting position, high pressure oil P is by hand change over valve 7 left positions, enter high pressure hose through the HP mouth and enter again oil cylinder, push the pilot operated valve device of hydraulic ram cylinder bottom plug-in mounting open, enter oil cylinder rodless cavity, promote cylinder piston rod and stretch out, realize the jacking of tower machine tower cap.This status system pressure is set up by by pass valve 6, and security of system pressure is determined by safety valve 5.
When system works during up to maximal pressure, from high-pressure overflow valve 6 oil returns, just in case high-pressure overflow valve 6 is bad, then from safety valve 5 oil returns, improved safety performance.
Claims (1)
1. tower machine jacking hydraulic system, comprise fuel tank (1), oil filter (2), plunger pump (3), electrical motor (4), high-pressure overflow valve (6), hand change over valve (7), low pressure relief valve (8) and internal control type balance cock (9), it is characterized in that: between high-pressure overflow valve (6) and plunger pump (3), a safety valve (5) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220249226 CN202754726U (en) | 2012-05-29 | 2012-05-29 | Jacking hydraulic system of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220249226 CN202754726U (en) | 2012-05-29 | 2012-05-29 | Jacking hydraulic system of tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202754726U true CN202754726U (en) | 2013-02-27 |
Family
ID=47733920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220249226 Expired - Fee Related CN202754726U (en) | 2012-05-29 | 2012-05-29 | Jacking hydraulic system of tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202754726U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252639A (en) * | 2013-04-23 | 2013-08-21 | 宁波赛维思机械有限公司 | Large-torque automatic fastening device |
| CN109956401A (en) * | 2019-04-11 | 2019-07-02 | 北京智盛和创科技有限公司 | A tower crane jacking system |
| CN114135534A (en) * | 2021-12-10 | 2022-03-04 | 徐州徐工液压件有限公司 | Tower crane jacking hydraulic system with micro-motion control and back pressure matching functions and control valve bank |
-
2012
- 2012-05-29 CN CN 201220249226 patent/CN202754726U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252639A (en) * | 2013-04-23 | 2013-08-21 | 宁波赛维思机械有限公司 | Large-torque automatic fastening device |
| CN109956401A (en) * | 2019-04-11 | 2019-07-02 | 北京智盛和创科技有限公司 | A tower crane jacking system |
| CN114135534A (en) * | 2021-12-10 | 2022-03-04 | 徐州徐工液压件有限公司 | Tower crane jacking hydraulic system with micro-motion control and back pressure matching functions and control valve bank |
| CN114135534B (en) * | 2021-12-10 | 2024-05-14 | 徐州徐工液压件有限公司 | Tower crane jacking hydraulic system with micro-motion control and back pressure matching functions and control valve group |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xuzhou Tian Long pivoting support Co., Ltd Assignor: Xuzhou Tianlong Hydraulic Machinery Co.,Ltd. Contract record no.: 2013320000143 Denomination of utility model: Jacking hydraulic system of tower crane Granted publication date: 20130227 License type: Exclusive License Record date: 20130319 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20140529 |