CN2205882Y

CN2205882Y - Explosion-proof oil-leaking stop valve

Info

Publication number: CN2205882Y
Application number: CN 94239836
Authority: CN
Inventors: 胡国清; 罗任飞; 罗彦昕; 罗绍先
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-16
Filing date: 1994-12-16
Publication date: 1995-08-23
Anticipated expiration: 2004-12-16

Abstract

The utility model relates to an explosion-proof oil-leaking stop valve used in a hydraulic system. An oil return valve port is arranged in a hydraulic valve body and between a flow passage connected to a pumping source and a flow passage connected to an oil tank. The bottom of a valve core is in a cone shape. When the valve core moves down, the cone can close a main oil way connected to the system, the oil return valve port is opened simultaneously, and the oil sent out by the pumping source can flow to the oil tank. When the valve core moves up, the main oil way connected to the system is then opened, the oil return valve port connected to the oil tank is closed, and the system can start normal work. A spring can be used for the automatic realization of the downward movement of the valve core. A large quantity of oil leakage resulted from the blowdown of a hose or components in the oil way can be prevented, so that the goal of automatic oil-leaking stop can be achieved.

Description

Explosion-proof oil-leaking stop valve

A kind of anti-exploding leakage valve that is used for hydraulic system belongs to the fluid pressure actuator class.

In common hydraulic system, the flexible pipe and the parts thereof that are used for oil circuit, owing to be in work under the high pressure for a long time, flexible pipe in the oil circuit and parts, explosion suddenly easily, the hydraulic system that is in operation, oil hydraulic pump is still running up, thereby a large amount of hydraulic oil are outwards sprayed, and has both caused energy waste, befouling environment again, and very easily cause fire; The remedial measure of at present the problems referred to above being taked is to cut off the electricity supply immediately, but hydraulic system is enclosed, treats that the operator judges system and is out of order, and the oil in the fuel tank has leaked, and to the hydraulic system of full-automatic unmanned operation, problem will be more serious.

The purpose of this utility model provides a kind of when the oil circuit explosion takes place in hydraulic system, can block the anti-exploding leakage valve of working connection automatically.

Scheme of the present utility model is between hydraulic system and pumping source, designs a return port, and the bottom of spool is a cone shape, when spool moves down, this cone can be closed the working connection that connects to system, opens return port simultaneously, the oil that pumping source is sent, flow to fuel tank, form a self-circulation system, when moving on the spool, then open the working connection that connects to being stream, and closing the return port that connects to fuel tank, system begins proper functioning; Moving down of spool, realize it by a spring, spring one by one promptly is installed between spool and end cover, select suitable spring force, make before system starts working, make on the spool with an external force and move, open working connection, make system works, because the back pressure effect makes the pressure upwards and the mutual balance of downforce of spring, thus the system of assurance proper functioning, in case flexible pipe in the system or parts explosion, back pressure is descended suddenly, and spring moves down spool and makes the cone of lower end close taper valve port A immediately to the elastic force that presses down, and has closed working connection and has opened return port, pumping source is communicated with fuel tank, reach automatic cut-off leakage of oil purpose.

The utility model has the advantages that when system works avoid particularly having significantly reduced unnecessary waste and environmental pollution because of the unexpected explosion of oil circuit causes leakage of oil, to full-automatic unmanned operation hydraulic system, the utility model will produce better effect.

The utility model has following accompanying drawing:

Accompanying drawing 1 is a sectional view of the present utility model.

Narrate embodiment of the present utility model below in conjunction with accompanying drawing:

As seen from the figure, the utility model is made up of valve body 3, valve pocket ring 1, end cover 6, spring 4 and spool 8; Wherein spool boss 10, spool boss 2 and spool boss 9 arranged with spool 8 is connected as a single entity; Valve body 3 right sides have C runner and E runner, and the left side has the F runner, have the D runner below, have return port B between E runner and F runner; Spool boss 9 is made cone shape, the external diameter of spool boss 2 just in time equal return port B internal diameter, the diameter aa of the diameter b b of its bottom and spool boss 9 upper ends equates, promptly face area between the two equates, between end cover 6 and the spool boss 10 spring 4 is housed, the C runner of valve body 3 is connected with pumping source, and the D runner is connected with system, and the F runner is connected with fuel tank; State shown in the figure is to be in by the leakage of oil state, and the working connection valve port A that promptly leads to system is closed, and return port B is opened; When system starts working, overcome the active force of spring 4 with an external force, make and move a displacement on the spool 8, close return port B after moving on the spool boss 2 at this moment, open working connection mouth A, the pumping source that is connected with runner C, make pressure oil through C runner-A mouth-D runner, flow to system, the oil circuit of E runner is closed by spool boss 2, after system's proper functioning, the mutual balance of power of back pressure among the runner D and spring 4 roof pressure spool boss 10, when guaranteeing that spool 8 is stabilized in the position of moving on certain, working connection valve port A is opened and oil circuit valve port B is closed, suitably select the pressure of spring 4, in the system debug process, solve; In case the unexpected explosion of oil circuit or parts in the system, then the pressure among the runner D reduces to zero, after losing back pressure, spring 4 just roof pressure spool 8 moves down, and makes spool boss 2 open return port B, and spool boss 9 is closed working connection mouth A, the hydraulic oil of pumping source output is through E runner-return port B-F runner-fuel tank, form a self-loopa system, flexible pipe or parts flow direction outside that or else pressure oil can flow through and break, befouling environment.

Claims

1, a kind of anti-exploding leakage valve, by valve body (3), valve pocket ring (1), end cover (6) and spool (8) are formed, it is characterized in that spool boss (10) being arranged with spool (8) is connected as a single entity, spool boss (2) and spool boss (9), valve body (3) has the C runner, the E runner, F runner and D runner, between E runner and F runner, have return port B, the internal diameter of return port B equals the external diameter of spool boss (2), on D runner top, have working connection valve port A, valve port A is taper, spool boss (9) is a cone, in end cover (6), spring (4) is installed between the spool boss (10).

2, described by claim 1 by the leakage of oil valve, the diameter aa that it is characterized in that spool boss (9) upper end equates with the diameter b b of spool boss (2) bottom, promptly the area of corresponding end face equates between the two, C runner on the valve body (3) is connected with pumping source, the D runner is connected with system, and the F runner is connected with fuel tank.