CN2641112Y

CN2641112Y - Pivot level-adjusting priority system for power

Info

Publication number: CN2641112Y
Application number: CN 03278589
Authority: CN
Inventors: 肖翀宇; 王富春; 黄立新; 纪星文; 袁成仁
Original assignee: Zhenjiang Huachen Huatong Road Machinery Co Ltd
Current assignee: Zhenjiang Huachen Huatong Road Machinery Co Ltd
Priority date: 2003-09-14
Filing date: 2003-09-14
Publication date: 2004-09-15
Anticipated expiration: 2013-09-14

Abstract

The utility model pertains to a road surface machine, relating to a paving machine pivot leveling prior system which is used in the road surface paving machine hydraulic pressure control system, which consists of two prior speed adjusting valves F1 and F2 and a flooding valve F3. The oil inlet A of the prior speed adjusting valve F1 is connected with a system oil pump; the oil inlet A is also connected with a system oil tank through the flooding valve F3 and an oil return mouth E; the prior oil outlet B of the prior speed adjusting valve F1 is connected with a pivot leveling oil cylinder; the bypass oil mouth of the prior speed adjusting valve is connected with the oil inlet of the prior speed adjusting valve F2; the prior oil outlet C of the prior speed adjusting valve F1 is connected with another pivot leveling oil cylinder; the bypass oil mouth of the prior speed adjusting valve F2 is connected with the other component cylinders in the hydraulic pressure control system. The utility model adopts two prior speed adjusting valves to supply oil to the two pivot oil cylinders so as to avoid the influence that the action of other components brings to the pivot oil cylinders and guarantee the quality of the paving road surface.

Description

Paver pivot leveling priority system

Technical field

The utility model belongs to pavement construction machinery, relates to a kind of paver pivot leveling priority system that is used for the sub-base grader hydraulic control system.

Background technology

In the hydraulic control system of existing sub-base grader, pivot leveling cyclinder and hopper oil cylinder, big arm lift cylinder insert same oil circuit side by side, in the course of work of paver, the action meeting of hopper, big arm etc. exerts an influence to pivot leveling speed by oil circuit, thereby has influenced the planeness of paving concrete pavement.

Summary of the invention

Technical problem to be solved in the utility model is, a kind of paver pivot leveling priority system of simple in structure, dependable performance is provided, and makes the action of parts such as hopper and big arm can not impact the pivot leveling.

Paver pivot leveling priority system of the present utility model is by two preferential flow speed control valve F1 and F2, and an overflow valve F3 forms, the oil-in A of preferential flow speed control valve F1 is connected with the system oil pump, oil-in A also is connected with the system fuel tank through overflow valve F3 and oil return opening E, the preferential oil-out B of preferential flow speed control valve F1 is connected with a pivot leveling cyclinder, the bypass hydraulic fluid port of preferential flow speed control valve F1 is connected with the oil-in of preferential flow speed control valve F2, the preferential oil-out C of preferential flow speed control valve F2 is connected with another pivot leveling cyclinder, bypass hydraulic fluid port D and the hopper oil cylinder of preferential flow speed control valve F2, other parts oil cylinder in the hydraulic control systems such as big arm lift cylinder connects.

Preferential flow speed control valve F1, F2 in the utility model paver pivot leveling priority system, and overflow valve F3 can flatly be inserted in the all-in-one-piece valve seat by fore-and-aft direction, above-mentioned hydraulic fluid port A opens on the bottom surface of this valve seat, hydraulic fluid port B and hydraulic fluid port C open on the end face of valve seat, and hydraulic fluid port D and hydraulic fluid port E open on the right flank of valve seat.

The utility model is owing to be two preferential fuel feeding of pivot leveling cyclinder by preferential flow speed control valve, thereby avoided the influence of other parts action to the pivot leveling cyclinder, guaranteed the quality of paving concrete pavement.

Description of drawings

Fig. 1 is oil channel structures figure of the present utility model;

Fig. 2 is a Facad structure schematic diagram of the present utility model;

Fig. 3 is the right view of Fig. 2;

Fig. 4 is the upward view of Fig. 2;

Fig. 5 is that Fig. 2 is a vertical view.

The specific embodiment

As shown in Figure 1, this paver pivot leveling priority system is made up of preferential flow speed control valve F1, F2 and overflow valve F3, after high-voltage oil liquid comes out from oil pump, A enters system from hydraulic fluid port, through preferential flow speed control valve F1, be preferably first pivot leveling cyclinder fuel feeding from hydraulic fluid port B, under the situation that satisfies second pivot leveling cyclinder, give preferential flow speed control valve F2 fuel feeding again, in like manner, could drive other parts (hopper oil cylinder, arm lift cylinder etc.) greatly under the situation of second pivot leveling cyclinder satisfying, when this has just been avoided driving other parts to the influence of pivot leveling cyclinder.

As Fig. 2～shown in Figure 5, in order to make system architecture of the present utility model compact more and be convenient to actual installation, preferential flow speed control valve F1, F2 and overflow valve F3 flatly are inserted in the all-in-one-piece valve seat 1 by fore-and-aft direction, hydraulic fluid port A opens on the bottom surface of this valve seat (as Fig. 4), hydraulic fluid port B and hydraulic fluid port C open on the end face of valve seat (as Fig. 5), and hydraulic fluid port D and hydraulic fluid port E open on the right flank of valve seat (as Fig. 3).

Claims

1, a kind of paver pivot leveling priority system, it is characterized in that: it is by two preferential flow speed control valve F1 and F2, and an overflow valve F3 forms, the oil-in A of preferential flow speed control valve F1 is connected with the system oil pump, oil-in A also is connected with the system fuel tank through overflow valve F3 and oil return opening E, the preferential oil-out B of preferential flow speed control valve F1 is connected with a pivot leveling cyclinder, the bypass hydraulic fluid port of preferential flow speed control valve F1 is connected with the oil-in of preferential flow speed control valve F2, the preferential oil-out C of preferential flow speed control valve F2 is connected with another pivot leveling cyclinder, and the bypass hydraulic fluid port D of preferential flow speed control valve F2 is connected with other parts oil cylinder in the hydraulic control system.

2, paver pivot leveling priority system according to claim 1, it is characterized in that: preferential flow speed control valve F1, F2, and overflow valve F3 flatly is inserted in the all-in-one-piece valve seat (1) by fore-and-aft direction, described hydraulic fluid port A opens on the bottom surface of this valve seat, hydraulic fluid port B and hydraulic fluid port C open on the end face of valve seat, and hydraulic fluid port D and hydraulic fluid port E open on the right flank of valve seat.