CN202754726U - Jacking hydraulic system of tower crane - Google Patents

Jacking hydraulic system of tower crane Download PDF

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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
Authority
CN
China
Prior art keywords
valve
pressure overflow
jacking hydraulic
safety
plunger pump
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
Application number
CN 201220249226
Other languages
Chinese (zh)
Inventor
吴景明
廉德升
刘庆梗
祁如贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XUZHOU TIANLONG HYDRAULIC MACHINERY CO Ltd
Original Assignee
XUZHOU TIANLONG HYDRAULIC MACHINERY CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by XUZHOU TIANLONG HYDRAULIC MACHINERY CO Ltd filed Critical XUZHOU TIANLONG HYDRAULIC MACHINERY CO Ltd
Priority to CN 201220249226 priority Critical patent/CN202754726U/en
Application granted granted Critical
Publication of CN202754726U publication Critical patent/CN202754726U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Tower machine jacking hydraulic system
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.
CN 201220249226 2012-05-29 2012-05-29 Jacking hydraulic system of tower crane Expired - Fee Related CN202754726U (en)

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 (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
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

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130227

Termination date: 20140529