CN201944027U

CN201944027U - Electro-hydraulic reversing valve

Info

Publication number: CN201944027U
Application number: CN201120014802XU
Authority: CN
Inventors: 张在波; 肖喜枝; 张明荣; 张俊; 朱雪松
Original assignee: Wuhan Dongjiang Valves Manufacturing Co Ltd
Current assignee: Wuhan Dongjiang Valves Manufacturing Co Ltd
Priority date: 2011-01-18
Filing date: 2011-01-18
Publication date: 2011-08-24
Anticipated expiration: 2021-01-18

Abstract

The utility model relates to an electro-hydraulic reversing valve, which comprises a valve body, a valve plug, a relief valve assembly and a motor. The electro-hydraulic reversing valve is characterized in that the motor is in threaded connection with a screw barrel at one end of the valve plug through a connecting shaft, the valve plug is in axial movement in the valve body which is provided with micro-switch acquisition signals used for automatically correcting initial position of a valve plug shaft and accurately controlling shifting of the valve plug shaft, and movement of the valve plug driven by the motor controls connection and disconnection of oil lines to realize hoisting and descending functions of actuator elements on an elevator mechanism. The electro-hydraulic reversing valve has the advantages of fast start and stop, high reliability, convenience in maintenance, simplicity in pipeline layout, continuously adjustable hoisting and descending speeds and capability of remote control.

Description

Electro-hydraulic directional control valve

Technical field

The utility model relates to valve, the hydraulicdirectional control valve of control actuating component ascending, descending on particularly a kind of elevator mechanism that is applicable to various dumping cars, lift etc.

Background technique

Hydraulic control (commutation) valve commonly used mostly is simple gas control, manual control or Electromagnetic Control on the China market at present, though these valves are also very convenient in use, can not effectively realize rising, the adjustment of rate of descent, and too numerous and diverse during maintenance, cost is higher, pipeline complexity during installation.Because the turbidity test of Domestic market hydraulic system are very difficult controlled at present, often occur causing the situation of the disabler of valve because spool is stuck, therefore, be necessary on the prior art basis, to make improvements.

Summary of the invention

The purpose of this utility model is the defective that exists for the solution prior art, and the needs at control actuating component ascending, descending on the elevator mechanism of various dumping cars, lift etc. propose a kind of novel electro-hydraulic directional control valve.

The technological scheme of taking is: described model utility comprises electro-hydraulic directional control valve, comprise valve body, spool, relief valve assembly and motor, spool is contained in the axis hole of valve body, two ends of valve body is equipped with housing and end cap respectively, motor is fixed on the housing, an end that it is characterized in that described spool is provided with swivel nut, and motor is by joining shaft and swivel nut scyewed joint, and spool moves axially in valve body.

The utility model also has following technical characteristics:

The swivel nut outside of described spool is provided with fixed cover, and swivel nut floats and is arranged in the fixed cover.

In housing, be provided with sensitive switch.

The utility model compared with prior art has outstanding feature:

One, this valve by structural improvement, has remedied its deficiency in performance that possesses other similar valve and advantage, is applicable to the control of executive component ascending, descending on the elevator mechanism of various dumping cars, lift etc.Take moving by the motor driving spool, the switching of control oil channel realizes the ascending, descending function of executive component on the elevator mechanism, turbidity test to the hydraulic working oil medium require to lower greatly, have and open and close rapidly, the reliability height keeps in repair easyly, and line arrangement is succinct, rising or falling speed is adjustable continuously, can realize the characteristics of telecontrol.

Two, between motor shaft and the spool by joining shaft and swivel nut scyewed joint, the circular movement of motor shaft is changed into the straight line motion of spool, sensitive reversing, accurate positioning, but and when descending electrodeless variable-speed, make spool can rest on the arbitrary position at any time when descending, the speed that operator can descend according to the elevator mechanism executive component is controlled stroke that spool moves arbitrarily and is realized falling soon of elevator mechanism or fall slowly when the decline state.

Three, the turbidity test at present Domestic market hydraulic system are difficult to controlled, often because spool is stuck, cause the situation of the disabler of valve, this valve is gathered signal by sensitive switch, automatically revise the poppet shaft initial position, with the displacement of accurate control valve mandrel.

Four, the swivel nut on the spool adopts floating installation, but self-alignment stuck phenomenon occurs when avoiding spool and motor shaft decentraction, and stable performance is safe and reliable.

Five, this valve arrangement compactness, external form is small and exquisite, and is easy to operate, saves the installing space and the cost of raw material to greatest extent.

Six, this valve adopt the union form into and out of hydraulic fluid port, can adjust the requirement of satisfying different clients into and out of the Conncetion cimension of hydraulic fluid port, highly versatile.

Description of drawings

Fig. 1 is one of the utility model embodiment's a structural representation;

Fig. 2 is a fundamental diagram.

Number in the figure is represented respectively: 1-end cap, 2-relief valve assembly, 3-spool, 4-valve body, 5-sensitive switch, 6-joining shaft, the 7-motor, 8-housing, 9-stop pin, 10-electric control box, 11-locating stud, the 12-swivel nut, 13-fixed cover, 14-return opening, 15-filler opening, 16-actuator port.

Embodiment

Figure 1 shows that one of embodiment of the present utility model, it mainly comprises valve body 4, spool 3, relief valve assembly 2 and motor 7 compositions, and motor 7 adopts actuating motors, and spool 3 is contained in the axis hole of valve body 4, the two ends of valve body 4 are installed housing 8 and end cap 1 respectively, and motor 7 is fixed on the housing 8.End at spool 3 is provided with swivel nut 12, and the outside of swivel nut 12 is fixed covers 13, and swivel nut 12 floats and is arranged in the fixed cover 13, but this structure makes self-alignment between spool 3 and the motor shaft, avoids spool 3 stuck phenomenon to occur with the motor shaft decentraction.Motor shaft is fixedlyed connected with joining shaft 6 usefulness locating studs 11, motor shaft is by joining shaft 6 and swivel nut 12 scyewed joint, motor 7 drives spools 3 and moves axially in valve body 4, and the switching of the mobile control oil channel by spool 3 reaches the purpose of the ascending, descending of executive component on the control elevator mechanism.

In housing 8, be provided with sensitive switch 5, the shift motion of the contact control spool 3 of sensitive switch 5, its signaling line is drawn out to electric control box 10.Sensitive switch 5 is gathered signal, revises the poppet shaft initial position automatically, with the displacement of accurate control valve mandrel.When appearance was unusual in spool 3 is moving, sensitive switch 5 was judged the mobile positions of spools 3 automatically, and transmits signals to control system rapidly, and control system promptly automatically terminates this phenomenon.

End at spool 3 is equipped with stop pin 9, can prevent effectively that spool from rotation occurring and influencing its performance when mobile.

Fig. 2 illustrates working principle of the present utility model.Below in conjunction with Fig. 1 and Fig. 2, the ascending, descending that is used for dumping car elevator mechanism control compartment with this valve illustrates its working principle: when the rising button is pressed in motor 7 energisings, motor shaft turns clockwise, swivel nut 12 spiral on joining shaft 6 moves to left, promote spool 3 certain distance that moves to left, filler opening 15 and actuator port 16 communicate, and hydraulic oil enters actuator port 16 by filler opening 15, enter elevating ram again, realize the rising in compartment.When pressing reset button, motor shaft is rotated counterclockwise, and swivel nut 12 spiral on joining shaft 6 moves to right, drive spool 3 and move to right certain distance to middle off-position, spool 3 cuts off filler opening 15 and actuator port 16, and the compartment stops not descending at this moment can keeping, and the goods in compartment is unsnatched.When pressing the decline button, motor shaft is rotated counterclockwise, and spool 3 continues right moving certain distance, connects until actuator port 16 and return opening 14, and the hydraulic oil in the lifting cylinder flows back to fuel tank from actuator port 16 through return opening 14, and the compartment descends.This routine electric control box 10 is provided with third gear and falls button slowly, can rotate to corresponding angle when selecting to press wherein one grade of motor when falling button slowly, spool 3 promptly moves to corresponding distance, realizes slow falling by the openings of sizes between control spool 3 and the valve body return opening 14.

Claims

1. electro-hydraulic directional control valve, comprise valve body (4), spool (3), relief valve assembly (2) and motor (7), spool (3) is contained in the axis hole of valve body (4), the two ends of valve body (4) are equipped with housing (8) and end cap (1) respectively, motor (7) is fixed on the housing (8), an end that it is characterized in that described spool (3) is provided with swivel nut (12), and motor (7) is by joining shaft (6) and swivel nut (12) scyewed joint, and spool (3) moves axially in valve body (4).

2. electro-hydraulic directional control valve according to claim 1 is characterized in that swivel nut (12) outside of described spool (3) is provided with fixed cover (13), and swivel nut (12) floats and is arranged in the fixed cover (13).

3. electro-hydraulic directional control valve according to claim 1 and 2 is characterized in that being provided with sensitive switch (5) in housing (8).