CN-224229017-U - Hydraulic system suitable for underground large-tonnage scraper

CN224229017UCN 224229017 UCN224229017 UCN 224229017UCN-224229017-U

Abstract

The utility model discloses a hydraulic system suitable for an underground large-tonnage scraper, which belongs to the technical field of hydraulic systems of scraper, and comprises a hydraulic oil tank, a first oil path unit, a second oil path unit and an oil supply loop, wherein the hydraulic oil tank is used for supplying oil to the hydraulic system, the first oil path unit is used for controlling lifting and tipping of a bucket of the scraper, the second oil path unit is used for controlling steering of the scraper, and the first oil path unit and the second oil path unit are respectively communicated with the hydraulic oil tank so as to form the oil supply loop. The utility model separates steering from lifting and tipping, has priority in steering, is beneficial to improving the safety of the scraper in the underground operation process, and can effectively solve the problem of action execution lag caused by oil stringing in a hydraulic system.

Inventors

ZHANG SHICHAO
JIA WENHONG
ZHOU BANGRONG
MA BINWEN
YANG WENBIN

Assignees

金川集团机械制造有限公司
金川集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250625

Claims (5)

1. The utility model provides a hydraulic system suitable for large-tonnage scraper in pit, which is characterized in that includes The hydraulic oil tank is connected with a first flow dividing valve which is respectively communicated with a first oil pump and a second oil pump, the second oil pump, a first valve block and a steering valve are sequentially connected, and the first valve block is used for controlling the pressure of a second oil path unit; The first oil way unit comprises a first oil pump, a first valve block, a main valve and a first oil return valve block which are sequentially communicated, wherein the main valve is respectively communicated with a tipping cylinder and a lifting cylinder of the scraper and is used for respectively driving the scraper to execute tipping and lifting actions, and the first valve block is an integrated overflow valve and is used for controlling the pressure of the first oil way unit; The second oil way unit comprises a second oil pump, a steering valve, a steering safety valve and a steering cylinder which are sequentially communicated, a liquid outlet of the steering valve is communicated with the first oil return valve block, the steering cylinder comprises a left steering cylinder and a right steering cylinder, the steering valve is used for controlling the left steering cylinder and the right steering cylinder, and the steering safety valve is used for limiting and stabilizing the pressure of an oil way; The first oil path unit and the second oil path unit are respectively communicated with the hydraulic oil tank to form an oil supply loop.
2. The hydraulic system of claim 1, further comprising a third oil circuit unit, wherein the third oil circuit unit comprises a third oil pump, a charging valve, a second flow dividing valve block, an energy accumulator, a third reversing valve, a shuttle valve, a foot brake valve and a second oil return valve block, the third oil pump, the charging valve and the second flow dividing valve block are sequentially communicated, a first liquid outlet of the second flow dividing valve block is connected with the energy accumulator, the energy accumulator is used for maintaining pressure and supplementing pressure, a second liquid outlet of the second flow dividing valve block is communicated with the third reversing valve, the shuttle valve and the foot brake valve are sequentially communicated, and the foot brake valve is used for controlling brake cylinders of a front axle and a rear axle of the scraper to brake.
3. The hydraulic system of claim 2, wherein the first outlet of the foot brake valve is respectively communicated with brake cylinders of the front axle and the rear axle, the second outlet of the foot brake valve is respectively communicated with a second oil return valve block, the outlet of the brake cylinder is provided with a valve plate which is opened by oil pressure to communicate the brake cylinders with the second oil return valve block, the valve plate is closed, the brake cylinders are disconnected from the second oil return valve block, and the brake cylinders respectively brake the front axle and the rear axle of the scraper.
4. The hydraulic system of claim 3, further comprising a fourth oil circuit unit including a first oil circuit, the first oil circuit including a fourth oil pump, a check valve, a radiator hydraulic motor, and a second oil return valve in sequential communication, the first oil circuit for driving the radiator to operate, and a second oil circuit for cooling oil in the second oil circuit, the second oil circuit being in communication with the front and rear axle brake cylinders.
5. The hydraulic system of claim 4, wherein the second oil distribution circuit comprises a cooling relief valve, a radiator and a distribution valve group which are sequentially connected, a second liquid outlet of the liquid filling valve is communicated with the cooling relief valve, and the distribution valve group is used for guiding oil into brake cylinders of the front axle and the rear axle so as to cool the front axle and the rear axle.

Description

Hydraulic system suitable for underground large-tonnage scraper Technical Field The utility model belongs to the technical field of hydraulic systems of scraper, and particularly relates to a hydraulic system suitable for a large-tonnage scraper in a well. Background When the existing scraper controls steering, lifting and tipping of a bucket, the main valve is generally adopted for control, and the problem of corresponding hysteresis is easy to occur when the scraper executes steering, lifting and tipping actions due to oil burst and insufficient oil pressure. When the large-tonnage scraper is braked, a large amount of heat is generated, and if the scraper is not cooled in time, the front axle and the rear axle of the scraper are easily damaged. Disclosure of utility model The utility model aims to provide a hydraulic system suitable for a large-tonnage underground scraper, and aims to solve the problems in the prior art in the background technology. In order to achieve the above purpose, the utility model adopts the following technical scheme: a hydraulic system suitable for a large tonnage scraper in a well comprises The hydraulic oil tank is used for supplying oil to the hydraulic system; a first oil path unit for controlling lifting and tilting of a bucket of the scraper; the second oil way unit is used for controlling the turning of the scraper; The first oil path unit and the second oil path unit are respectively communicated with the hydraulic oil tank to form an oil supply loop. Further, the first oil way unit comprises a first oil pump, a first valve block, a main valve and a first oil return valve block which are sequentially communicated, the main valve is respectively communicated with a tipping cylinder and a lifting cylinder of the scraper, the main valve is used for respectively driving the scraper to execute tipping and lifting actions, and the first valve block is an integrated overflow valve and is used for controlling the pressure of the first oil way unit. Further, the second oil way unit comprises a second oil pump, a steering valve, a steering safety valve and a steering cylinder which are sequentially communicated, a liquid outlet of the steering valve is communicated with the first oil return valve block, the steering cylinder comprises a left steering cylinder and a right steering cylinder, the steering valve is used for controlling the left steering cylinder and the right steering cylinder, and the steering safety valve is used for limiting and stabilizing the pressure of an oil way. Further, the hydraulic oil tank is connected with a first flow dividing valve, the first flow dividing valve is respectively communicated with a first oil pump and a second oil pump, the second oil pump, a first valve block and a steering valve are sequentially connected, and the first valve block is used for controlling the pressure of the second oil way unit. Further, a third oil path unit is also included for controlling the parking of the scraper. The third oil way unit comprises a third oil pump, a liquid filling valve, a second flow dividing valve block, an energy accumulator, a third reversing valve, a shuttle valve, a foot brake valve and a second oil return valve block, wherein the third oil pump, the liquid filling valve and the second flow dividing valve block are sequentially communicated, a first liquid outlet of the second flow dividing valve block is connected with the energy accumulator, the energy accumulator is used for maintaining pressure and supplementing pressure, a second liquid outlet of the second flow dividing valve block is communicated with the third reversing valve, the shuttle valve and the foot brake valve are sequentially communicated, and the foot brake valve is used for controlling brake cylinders of a front axle and a rear axle of the scraper to brake. Further, a first liquid outlet of the foot brake valve is respectively communicated with brake oil cylinders of the front axle and the rear axle, a second liquid outlet of the foot brake valve is respectively communicated with a second oil return valve block, a liquid outlet of the brake oil cylinder is provided with a valve plate, the valve plate is opened by oil pressure to be communicated with the brake oil cylinder and the second oil return valve block, the valve plate is closed, the brake oil cylinder is disconnected with the second oil return valve block, and the brake oil cylinder respectively brakes the front axle and the rear axle of the scraper. Further, a fourth oil path unit for cooling the front and rear axles of the scraper is also included. Further, the fourth oil way unit comprises a first oil dividing way, a second oil dividing way and a third oil dividing way, wherein the first oil dividing way comprises a fourth oil pump, a one-way valve, a hydraulic motor of a radiator and a second oil return valve which are sequentially communicated, the first oil dividing way is used for driving the radiator to op