CN103541940A

CN103541940A - Pilot control valve group of rock raking machine

Info

Publication number: CN103541940A
Application number: CN201310486696.9A
Authority: CN
Inventors: 侯友夫
Original assignee: Xuzhou Wuyang Technology Co Ltd
Current assignee: Xuzhou Wuyang Technology Co Ltd
Priority date: 2013-10-17
Filing date: 2013-10-17
Publication date: 2014-01-29
Anticipated expiration: 2033-10-17
Also published as: CN103541940B

Abstract

The invention discloses a pilot control valve group of a rock raking machine and belongs to the technical field of control valves. The pilot control valve group comprises a hydraulic loop arranged in the valve group, a pilot switch handle, a walk switching handle and an externally-connected oil port, the pilot switch handle, the walk switching handle and the externally-connected oil port are arranged outside the valve group, and the pilot switch handle and the walk switching handle which are rotary handles control two reversing valves in the hydraulic loop respectively. The pilot control valve group has the advantages that the pilot control valve group is small in structural size, convenient to mount, easy to be arranged inside a driving cab and convenient for working personnel to operate, and space occupied in the driving cab is reduced; designing of the hydraulic loop in the valve group guarantees running safety of a system, and under the action of a pilot master switch, operating states of the rock raking machine can be controlled to enable equipment to acquire sufficient safety guarantee in the process of use, so that stability of the system is improved.

Description

A kind of rock machine pilot-actuated valve group of taking off

Technical field

The present invention relates to a kind of rock machine pilot-actuated valve group of taking off, belong to control valve technical field.

Background technique

Take off in rock machine hydraulic system, there is the pilot-actuated valve group of controlling leading controller and cooling system pressure control device, for convenience of staff's operation, generally this control valve group is arranged in to operator cabin inside, handle in control valve group generally adopts bracing structure, staff is realized and is controlled function by push-and-pull, in narrow and small operator cabin, can take larger space undoubtedly.

Summary of the invention

The problem existing for above-mentioned prior art, the invention provides a kind of rock machine pilot-actuated valve group of taking off, and by the change of lever operated mode, reduces taking up room of pilot-actuated valve group.

To achieve these goals, the technical solution used in the present invention is: a kind of rock machine pilot-actuated valve group of taking off, comprise the guide switch handle, walking switching handle and the external hydraulic fluid port that are arranged on the oil hydraulic circuit in valve group and are arranged on valve group outside, two selector valves in oil hydraulic circuit in handle difference control valve group are switched in guide switch handle, walking, and it is rotary type handle that handle is switched in guide switch handle, walking.

Described valve piece outside has P, P1, A, B, C, M, seven external hydraulic fluid ports of T.

In described oil hydraulic circuit, there is the first relief valve, the first selector valve, the second selector valve and the second relief valve that by valve piece internal oil passages, are communicated with; Guide switch handle is controlled the first selector valve, and handle control the second selector valve is switched in walking; P hydraulic fluid port communicates with a mouth of the first relief valve, the c mouth of the b mouth of the first selector valve, the second selector valve and M hydraulic fluid port; T hydraulic fluid port with the b mouth of the first relief valve, a mouth of the b mouth of the second relief valve, the first selector valve and a mouth of the second selector valve communicate, P1 hydraulic fluid port communicates with a mouth and the C hydraulic fluid port of the second relief valve, the c mouth of the first selector valve communicates with A hydraulic fluid port, and the b mouth of the second selector valve communicates with B hydraulic fluid port.

Structural volume of the present invention is little, has reduced the space taking in operator cabin, easy for installation, is easy to be arranged in operator cabin inside, facilitates staff to operate; In valve group, the design of oil hydraulic circuit has guaranteed the security of operation of system, under the effect of guide's switch knob, can control the serviceability of complete machine, makes equipment in use obtain sufficient safety guarantee, has increased the stability of machine system.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is hydraulic schematic diagram of the present invention.

In figure: 1, guide switch handle, 2, walking switches handle, 3, external hydraulic fluid port, the 4, first relief valve, the 5, first selector valve, the 6, second selector valve, the 7, second relief valve.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described.

As shown in Figure 1: the present invention includes the guide switch handle 1, the walking that are arranged on the oil hydraulic circuit in valve group and are arranged on valve group outside and switch handle 2 and external hydraulic fluid port 3, two selector valves in oil hydraulic circuit in handle 2 difference control valve groups are switched in guide switch handle 1, walking, and it is rotary type handle that handle 2 is switched in guide switch handle 1, walking.

Valve piece outside has P, P1, A, B, C, M, seven external hydraulic fluid ports 3 of T.

As shown in Figure 2, in oil hydraulic circuit, there is the first relief valve 4, the first selector valve 5, the second selector valve 6 and the second relief valve 7 being communicated with by valve piece internal oil passages; Guide switch handle 1 is controlled the first selector valve 5, and handle control the second selector valve 6 is switched in walking; P hydraulic fluid port communicates with a mouth of the first relief valve 4, c mouth and the M hydraulic fluid port of the b mouth of the first selector valve 5, the second selector valve 6; T hydraulic fluid port with the b mouth of the first relief valve 4, a mouth of the b mouth of the second relief valve 7, the first selector valve 5 and a mouth of the second selector valve 6 communicate, P1 hydraulic fluid port communicates with a mouth and the C hydraulic fluid port of the second relief valve 7, the c mouth of the first selector valve 5 communicates with A hydraulic fluid port, and the b mouth of the second selector valve 6 communicates with B hydraulic fluid port.

The first relief valve 4, as pilot pressure modulating valve, is controlled pilot system pressure, and the second relief valve 7 is that P1 pressure oil mouth pressure oil is adjusted pressure.When guide's switch knob 1 is during in opening state, the first selector valve 5 is connected b mouths, and pilot port A obtains pressure oil, now, opens walking and switches handle 2, the second selector valves 6 connection b mouths, and pilot port B obtains pressure oil; Taking off rock machine normally uses; Guide switch handle 1 when closed condition, P hydraulic fluid port and T hydraulic fluid port UNICOM, pilot port A hydraulic fluid port system cannot build-up pressure, in such cases, in any case control the walking of the second selector valve 6, switches handle 2 operations, pilot port B hydraulic fluid port all cannot build-up pressure; The present invention, by controlling the guide switch handle 1 being connected with the first selector valve 5, controls complete machine serviceability, takes off rock machine and in use obtains sufficient safety guarantee, has increased the stability of machine system.

Claims

1. take off rock machine pilot-actuated valve group for one kind, comprise the guide switch handle (1), walking switching handle (2) and the external hydraulic fluid port (3) that are arranged on the oil hydraulic circuit in valve group and are arranged on valve group outside, two selector valves in oil hydraulic circuit in handle (2) difference control valve group are switched in guide switch handle (1), walking, it is characterized in that, it is rotary type handle that handle (2) is switched in guide switch handle (1), walking.

2. a kind of rock machine pilot-actuated valve group of taking off according to claim 1, is characterized in that, described valve piece outside has P, P1, A, B, C, M, seven external hydraulic fluid ports of T (3).

3. a kind of rock machine pilot-actuated valve group of taking off according to claim 2, it is characterized in that in described oil hydraulic circuit, thering is the first relief valve (4), the first selector valve (5), the second selector valve (6) and the second relief valve (7) that by valve piece internal oil passages, are communicated with; Guide switch handle (1) is controlled the first selector valve (5), and handle control the second selector valve (6) is switched in walking; P hydraulic fluid port communicates with a mouth of the first relief valve (4), c mouth and the M hydraulic fluid port of the b mouth of the first selector valve (5), the second selector valve (6); T hydraulic fluid port with the b mouth of the first relief valve (4), a mouth of the b mouth of the second relief valve (7), the first selector valve (5) and a mouth of the second selector valve (6) communicate, P1 hydraulic fluid port communicates with a mouth and the C hydraulic fluid port of the second relief valve (7), the c mouth of the first selector valve (5) communicates with A hydraulic fluid port, and the b mouth of the second selector valve (6) communicates with B hydraulic fluid port.