CN-224200889-U - Front top hydraulic cylinder control system for improved dumper

CN224200889UCN 224200889 UCN224200889 UCN 224200889UCN-224200889-U

Abstract

The utility model discloses an improved front top hydraulic cylinder control system for a dumper, which comprises an oil tank, an oil pump, a slow-down pneumatic control reversing valve, a manual control slow-down reversing valve, a limiting valve, a front top hydraulic cylinder, an explosion-proof valve, an oil pipe, an air pipe and an air storage cylinder, wherein the oil tank is respectively connected with the oil pump and the slow-down pneumatic control reversing valve, the oil pump is connected with the slow-down pneumatic control reversing valve, the slow-down pneumatic control reversing valve is connected with the front top hydraulic cylinder through the oil pipe, the manual control slow-down reversing valve is connected with the slow-down pneumatic control reversing valve through the air pipe, the limiting valve is respectively connected with the slow-down pneumatic control reversing valve and the manual control slow-down reversing valve, the air storage cylinder is connected with the manual control slow-down reversing valve, and the explosion-proof valve is arranged between the slow-down pneumatic control reversing valve and the front top hydraulic cylinder and is connected with the oil pipe. The utility model has the advantages of avoiding the front top hydraulic cylinder from falling down quickly due to stall to cause breakage, and avoiding the side turning caused by the breakage of the front top hydraulic cylinder and the manual injury of a driver caused by the side turning of the dump truck carriage.

Inventors

LI BIN
CHEN YONG
HUANG HUANG
YANG WUHONG
PANG JIAN

Assignees

中国重汽集团湖北华威专用汽车有限公司

Dates

Publication Date: 20260505
Application Date: 20250606

Claims (3)

1. The utility model provides an improved generation is hydraulic cylinder control system of pushing down before for dumper, includes oil tank (1), oil pump (2), gas accuse switching-over valve that slowly falls (3), manual gas accuse switching-over valve that slowly falls (4), limit valve (5), preceding top hydraulic cylinder (7), oil pipe (8), trachea (9) and air reservoir (10), oil tank (1) respectively with oil pump (2) and gas accuse switching-over valve that slowly falls (3) are connected, oil pump (2) with gas accuse switching-over valve that slowly falls (3) are connected, gas accuse switching-over valve that slowly falls (3) are connected with preceding top hydraulic cylinder (7) through oil pipe (8), manual gas accuse switching-over valve that slowly falls (4) are connected with gas accuse switching-over valve that slowly falls (3) and manual gas accuse switching-over valve that slowly falls (4) respectively, air reservoir (10) with be connected with gas accuse switching-over valve that slowly falls (4), characterized in that prevent explosion-proof valve (6) are connected with gas accuse switching-over valve (7) before oil cylinder (8) are passed through trachea (9).
2. The improved front top hydraulic cylinder control system for the dumper, which is disclosed in claim 1, is characterized in that the explosion-proof valve (6) is a one-way explosion-proof valve and comprises an oil inlet D and an oil outlet C, the oil inlet D is connected with an oil pipe (8), and the oil outlet C is connected with an oil inlet of the front top hydraulic cylinder (7).
3. The control system of the front top hydraulic cylinder for the improved dumper according to claim 1, wherein the manual slow-down reversing valve (4) is composed of a first manual slow-down reversing valve (401) and a second manual slow-down reversing valve (402), a high-pressure air outlet A of the first manual slow-down reversing valve (401) is connected with a slow-down air outlet of the slow-down reversing valve (3) through a slow-down air pipe (11), a high-pressure air outlet A of the second manual slow-down reversing valve (402) is connected with an air inlet P of the limiting valve (5) through a first lifting air pipe (12), a high-pressure air outlet A of the limiting valve (5) is connected with a lifting air outlet of the slow-down reversing valve (3) through a second lifting air pipe (13), a high-pressure air outlet B of the second manual slow-down reversing valve (402) is connected with a slow-down air outlet of the slow-down reversing valve (3) through an air pipe (9), the first slow-down reversing valve (401) is connected with an air inlet P of the second manual reversing valve (14) through a slow-down air pipe (14) and is connected with the air inlet P of the slow-down reversing valve (402) through a slow-down air inlet of the air pipe (14) in parallel with the air inlet of the air pipe (402).

Description

Front top hydraulic cylinder control system for improved dumper Technical Field The utility model relates to the technical field of control of a front top hydraulic cylinder for a dumper, in particular to an improved front top hydraulic cylinder control system for the dumper. Background In the existing control system of the front top hydraulic cylinder for the dump truck, as shown in fig. 1, no explosion-proof device, such as an explosion-proof valve, is usually arranged in a hydraulic oil path, and when an oil pipe 8 is broken, the front top hydraulic cylinder 7 in the hydraulic oil path usually drops rapidly due to stall, so that the front top hydraulic cylinder 7 is broken. In addition, the side-turning accident of the dumper carriage caused by the breakage of the front top hydraulic cylinder 7 is easy to occur, and meanwhile, the problem of extremely damaging a driver in a cab caused by side-turning of the carriage is also accompanied. Disclosure of utility model The utility model aims to provide an improved front top hydraulic cylinder control system for a dumper, which is used for solving the technical problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The utility model provides an improved generation is hydraulic cylinder control system of pushing up before for dumper, includes oil tank, oil pump, slow down gas accuse switching-over valve, manual slow down switching-over valve, stop valve, pushing up hydraulic cylinder before, oil pipe, trachea and air reservoir, the oil tank respectively with oil pump and slow down gas accuse switching-over valve are connected, the oil pump with slow down gas accuse switching-over valve is connected, slow down gas accuse switching-over valve pass through oil pipe with pushing up hydraulic cylinder before is connected, manual slow down switching-over valve pass through the trachea with slow down gas accuse switching-over valve is connected, stop valve respectively with slow down gas accuse switching-over valve and manual slow down switching-over valve are connected, the air reservoir with manual slow down switching-over valve is connected, still include the explosion-proof valve, the explosion-proof valve sets up between slow down gas accuse switching-over valve and pushing up hydraulic cylinder before, and with the oil pipe is connected. Further, the explosion-proof valve is a one-way explosion-proof valve and comprises an oil inlet D and an oil outlet C, the oil inlet D is connected with an oil pipe, and the oil outlet C is connected with an oil inlet of the front top hydraulic cylinder. Further, the manual control slow-descending reversing valve is composed of a first manual control slow-descending reversing valve and a second manual control slow-descending reversing valve, a high-pressure air outlet A of the first manual control slow-descending reversing valve is connected with a slow-descending air outlet of the slow-descending reversing valve through a slow-descending air pipe, a high-pressure air outlet A of the second manual control slow-descending reversing valve is connected with an air inlet P of the limiting valve through a first lifting air pipe, a high-pressure air outlet A of the limiting valve is connected with a lifting air outlet of the slow-descending air reversing valve through a second lifting air pipe, a high-pressure air outlet B of the second manual control slow-descending reversing valve is connected with a descending air outlet of the slow-descending air reversing valve through an air pipe, the air inlet P of the first manual control slow-descending reversing valve is connected with an air inlet P of the second manual control slow-descending reversing valve in parallel, the first manual control slow-descending reversing valve is communicated with an air storage air pipe, and the air return outlet O of the first manual control slow-descending reversing valve is connected with the air outlet O of the second manual control slow-descending reversing valve in parallel, and the air outlet of the limiting valve is communicated with the outside atmosphere through an air pipe. Compared with the prior art, the utility model has the following advantages: (1) The hydraulic cylinder at the front top is prevented from falling down rapidly due to stall, so that breakage is avoided; (2) The side turning accident of the dumper carriage caused by the breakage of the front top hydraulic cylinder is avoided; (3) The damage to the driver caused by the rollover accident of the dumper carriage is avoided. Drawings In order to more clearly illustrate the technical solutions in this embodiment, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings described below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings with