CN2460764Y

CN2460764Y - Gas control distributing valve

Info

Publication number: CN2460764Y
Application number: CN 00237446
Authority: CN
Inventors: 黄培华
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-16
Filing date: 2000-06-16
Publication date: 2001-11-21
Anticipated expiration: 2010-06-16

Abstract

The utility model relates to a gas control lifting distributing valve which comprises a valve body and a valve core, wherein, an inner cavity for installing the valve core and an oil transporting path corresponding to the inner cavity are arranged in the valve body. The valve core comprises a cylinder piston, a valve rod connected with the cylinder piston into a whole, a return spring, a dividing sleeve, and a sealing sleeve, wherein, the dividing sleeve divides the inner cavity into an air chamber and an oil return chamber; the valve rod passes through the air chamber and the oil return chamber; the end head of the valve rod is a sealing face structure; the sealing face and the sealing sleeve form and control the on-off between the oil return chamber and the oil transporting path. The oil return chamber is communicated with an oil return pipe arranged on the upper end of the valve body. The valve has the advantages of simple structure, small size, good sealing effect, high safety, and convenient operation and maintenance. The utility model can be used by matching with hydraulic lifting systems of various dump trucks.

Description

The gas control distributing valve

The utility model relates to a kind of air control lifting distributing valve.

Chinese patent literature discloses a kind of technological scheme of lifting distributing valve of dump truck with notification number CN2248264 on February 26th, 97, this scheme is made up of in line check valve, pressure-limit valve, positioning means, guiding valve, valve body and return spring, its in line check valve and pressure-limit valve are installed in the upper end of valve body, middle part at valve body is equipped with guiding valve, afterbody at guiding valve and valve body is equipped with positioning means and return spring, the trend of the mobile may command hydraulic oil of the commutation of guiding valve, the lifting of controlled device when promptly being implemented in air inlet, the control mode that controlled device descends when holding one's breath.But this kind control mode promptly can not be finished the lifting action when Pneumatic valve breaks down, particularly break down in the lifting process, very easily causes controlled device to fall suddenly, and accidents caused.

The purpose of this utility model is to provide a kind of gas control distributing valve with the lifting of holding one's breath, air inlet decline control mode.

The purpose of this utility model is achieved in that the utility model comprises valve body and spool, be provided with in the valve body 10 assembling spool inner chamber and with the corresponding oil transportation path 11 of inner chamber, described spool comprises cylinder piston 5 and the valve rod 6 that is connected as a single entity with cylinder piston 5, reset spring 7 and valve body 10 inner chambers are separated into gas chamber 12, the branch spacer 8 of oil return chamber 13, stuffing box gland 9, valve rod 6 runs through gas chamber 12 and oil return chamber 13, the termination of valve rod 6 is a sealing surface structure, its termination is stretched through the return opening 14 of being located at stuffing box gland 9 middle parts and is put in the oil transportation path, oil return chamber 13 is communicated with the return tube 4 of being located at valve body 10 upper ends, and reset spring 7 is set in cylinder piston 5 and divides on the valve rod 6 of 8 of spacers.

Return tube 4 is linked to each other with valve body 10 by a clamping bolt 3 that is provided with oil guiding hole, and its return tube 4 can take up fixing bolt 3 and rotate.

Equipped double-deck " O " RunddichtringO 2 on the cylinder piston 5.Gas chamber's 12 equipped cylinder end pieces 1, seal ring 2 is installed additional in 12 of its cylinder end piece 1 and gas chamber.

The technological progress that the utility model is obtained: this valve and the supporting use of dump truck hydraulic control system, valve is the locking shape under the normality, close between its oil transportation path and way to cycle oil, can by hydraulic control system realize to the oil hydraulic cylinder lifting or in the control that stops.Under the effect of control air pressure, can make valve rod produce displacement, make between oil transportation path and way to cycle oil to be communicated with.Finish the contraction down maneuver of oil hydraulic cylinder.Thereby realized hydraulic control system to the lifting of oil hydraulic cylinder under the state of holding one's breath, in stop the control mode that descends at the air inlet state.This kind control mode not only when pneumatic control system breaks down, also can make oil hydraulic cylinder finish lifting and in the action that stops, and when having prevented catastrophic failure effectively accidents caused generation, this valve arrangement is simple simultaneously, volume is little, good sealing effect.

Be that embodiment describes the utility model progress below with the accompanying drawing:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the left side structural representation of Fig. 1.

Fig. 3 is second kind of mode of execution structural representation of the utility model.

As shown in Figure 1, 2, this valve mainly is made of valve body 10 and spool.Be provided with the inner chamber and vertical corresponding oil transportation path 11 with inner chamber of an equipped spool in valve body 10, the while is provided with suction port on its left surface, and just, be provided with oil inlet and outlet A, B on the trailing flank, oil inlet and outlet A, B are by 11 connections of oil transportation path.Described spool is mainly formed for the valve rod 6 of one, reset spring 7 and with branch spacer 8, sealing steel bushing 9 that valve body 10 inner chambers are separated into gas chamber 12, oil return chamber 13 by cylinder piston 5 with cylinder piston 5.Valve rod 6 runs through gas chamber 12 and oil return chamber 13, the top of valve rod 6 is a bevel sealing surface, also can be the ball sealing surface, the return opening 14 of its sealing surface through being located at sealing steel bushing 9 middle parts extends in the oil transportation path 11, and reset spring 7 is set in cylinder piston 5 and divides on the valve rod 6 of 8 of spacers.Oil return chamber 13 through return opening be located at valve body 10 upper-end surfaces on rotatable return tube 4 be communicated with, return tube 4 is connected with valve body 10 by the clamping bolt 3 that is provided with oil guiding hole.For the sealing effect that improves cylinder piston 5 has installed double-deck " O " RunddichtringO 2 additional in its outer periphery.

Fig. 3 is an another kind of mode of execution of the present utility model, with the difference of the foregoing description be, more simple and convenient for the manufacturing and the assembling that make valve, will divide spacer 8 and stuffing box gland 9 to be made as one with valve body 10, valve rod 6 is one fen body structure with the bevel sealing surface of termination.Reset spring 7 is located at the another side of bevel sealing surface, and reset spring 7 and valve rod 6 are on same axis, and the two is a pair of top shape.

The supporting use of the hydraulic control system of this valve and dump truck, promptly the suction port D of this valve is connected with the pneumatic control system of system, filler opening A links to each other with oil pump through an one-way valve, and oil outlet B links to each other with the oil hydraulic cylinder cavity of resorption, and return opening C is communicated with oil hydraulic cylinder epicoele and fuel tank respectively through return tube 4.Its working procedure is as follows: the lifting process: operating grip is put lift location, and the hydraulic oil of oil pump output enters oil transportation path 11 through one-way valve by the A mouth, enters the oil hydraulic cylinder cavity of resorption through oil outlet B again, promotes hydraulic cylinder piston and trails.The hydraulic oil of oil hydraulic cylinder epicoele flows back to fuel tank through return tube 4 under piston promotes simultaneously.In stop process: place off-position to put operating grip, the oil pump fuel cut-off, one-way valve is closed under the effect of hydraulic jack cavity of resorption oil, hydraulic oil can not reflux, oil hydraulic cylinder stops at a certain position.Decline process: operating grip is placed lowering position, the source of the gas of control system is connected, control gas enters gas chamber 12 by suction port D, promote piston 5 motions, driving valve rod 6 simultaneously moves right, promptly open the sealing of valve rod 6 termination sealing surfaces to return opening 14, oil inlet and outlet A, the B that makes communicates with return opening C.The hydraulic oil of oil hydraulic cylinder cavity of resorption is put oil back chamber 13 by oil outlet B backflow, the closed check valve of this moment under the effect of railway carriage deadweight at this moment, the A mouth can not reflux, C enters return tube through return opening, thereby a hydraulic oil part enters the oil hydraulic cylinder epicoele, and a part flows back to fuel tank.

Claims

1, the gas control distributing valve, it comprises valve body and spool, it is characterized in that being provided with in the valve body (10) the assembling spool inner chamber and with the corresponding oil transportation path of inner chamber (11), described spool comprises cylinder piston (5) and the valve rod (6) that is connected as a single entity with cylinder piston (5), reset spring (7) and valve body (10) inner chamber is separated into gas chamber (12), the branch spacer (8) of oil return chamber (13), stuffing box gland (9), valve rod (6) runs through gas chamber (12) and oil return chamber (13), the termination of valve rod (6) is a sealing surface structure, its termination is stretched through the return opening (14) of being located at stuffing box gland (9) middle part and is put in the oil transportation path, oil return chamber (13) is communicated with the return tube (4) of being located at valve body (10) upper end, and reset spring (7) is set on the valve rod (6) between cylinder piston (5) and branch spacer (8).

2, gas control distributing valve according to claim 1 is characterized in that return tube (4) is linked to each other with valve body (10) by a clamping bolt (3) that is provided with oil guiding hole, and its return tube (4) can take up fixing bolt (3) and rotate.

3, gas control distributing valve according to claim 1 and 2 is characterized in that upward equipped double-deck " O " RunddichtringO (2) of cylinder piston (5).

4, gas control distributing valve according to claim 1 is characterized in that gas chamber (12) is equipped with a gas end cap (1), installs seal ring (2) additional between its cylinder end piece (1) and gas chamber (12).