CN201348062Y

CN201348062Y - Pneumatic reversal valve

Info

Publication number: CN201348062Y
Application number: CNU2008201526620U
Authority: CN
Inventors: 叶佳杰; 俞金贤
Original assignee: Ningbo Shunxing Machinery Manufacturing Co Ltd
Current assignee: Ningbo Shunxing Machinery Manufacturing Co Ltd
Priority date: 2008-09-03
Filing date: 2008-09-03
Publication date: 2009-11-18
Anticipated expiration: 2018-09-03

Abstract

The utility model relates to a pneumatic reversal valve, which comprises a valve body, a valve sleeve, a first valve element, a valve element lift pin, a nut, a spring, a piston, a cylinder block, a drainage T port, a working oil A port, a pressure oil P port and an air connection, wherein the valve body is provided with the working oil A port, the pressure oil P port and the drainage T port and is connected with the cylinder block by bolts; the spring is wound on the valve element lift pin; and the first valve element is arranged inside the valve sleeve. The pneumatic reversal valve also comprises a second valve element, a third valve element and a valve element spring, wherein one end of the valve element spring is connected with the first valve element; and the second valve element and the third valve element are arranged inside the valve sleeve. The pneumatic reversal valve belongs to a matching part of the hydraulic system, aims at solving the problem that the pressure oil is easy to lose, and has good pressure-maintaining effect when a power source is off.

Description

Pneumatic reversal valve

Technical field

The utility model relates to a kind of and the Pneumatic reversal valve supporting practicality of hydraulic system.

Background technique

Generally by the commutation of solenoid actuated spool, owing to have the gap in the middle of spool and the valve pocket, pressure oil can flow in the other chamber by the gap and produce the pressure loss tradition selector valve.So some must pressurize, require pressure oil can not the situation of any loss under, traditional selector valve does not just satisfy such requirement, and complex structure, is not easy manufacturing.

The model utility content

Solve the above-mentioned technical problem that traditional selector valve exists, and a kind of Pneumatic reversal valve of two-position three way formula is provided.

For achieving the above object, the technical solution of the utility model is as follows:

Pneumatic reversal valve comprises valve body (1), valve pocket (2), first spool (3), spool thimble (6), nut (7), spring (8), piston (9), cylinder block (10), draining T mouth (11), working oil A mouth (12), pressure oil P mouth (14), gas source interface (15), valve body (1) offers working oil A mouth (12), pressure oil P mouth (14), and working oil A mouth (12) and pressure oil P mouth (14) communicate, valve body (1) is connected by screw with cylinder block (10), piston (9) is arranged on the position that cylinder block (10) is established in advance, and spring (8) is on spool thimble (6), and first spool (3) is arranged in the valve pocket (2), second spool (4), the 3rd spool (5), valve core spring (13), an end of valve core spring (13) are connected on first spool (3), second spool (4), the 3rd spool (5) is arranged in the valve pocket (2).

Valve pocket (2), first spool (3), second spool (4) and the 3rd spool (5) all are to contact by Sealing.

First spool (3) one sides have the edge oil groove.

The 3rd spool (5) one sides have the edge oil groove.

Beneficial effect:

By spring promote that spool automatically resets, being used of several spools, when spool commutates, spool all is to contact by Sealing with valve pocket, make the two-position three way Pneumatic reversal valve of brand-new exploitation that good pressurize effect can be arranged under the situation that power source is closed, substantially there is not the pressure loss, and simple in structure, easily processing.

Description of drawings

Fig. 1 is a sectional front view of the present utility model;

Fig. 2 is a plan view of the present utility model;

Embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

As shown in Figure 1, Pneumatic reversal valve comprises valve body 1, valve pocket 2, the first spools 3, spool thimble 6, nut 7, spring 8, piston 9, cylinder block 10, draining T mouth 11, working oil A mouth 12, pressure oil P mouth 14, gas source interface 15, valve body 1 offers working oil A mouth 12, pressure oil P mouth 14, and working oil A mouth 12 and pressure oil P mouth 14 communicate, and valve body 1 and cylinder block 10 are connected by screw, and piston 9 is arranged on the position that cylinder block 10 is established in advance, spring 8 is on spool thimble 6, first spool 3 is arranged in the valve pocket 2, second spool, 4, the three spools 5, valve core spring 13, one end of valve core spring 13 is connected on first spool 3, and second spool, 4, the three spools 5 are arranged in the valve pocket 2.

Valve pocket 2, first spool 3, second spool 4 and the 3rd spool 5 all are to contact by the special material sealing.

First spool, 3 one sides have the edge oil groove.

The 3rd spool 5 one sides have the edge oil groove.

As Fig. 1, shown in Figure 2, pressure oil promotes first spool 3 by pressure oil P mouth 14, enters into working oil A mouth 12, reach setting pressure after, even this moment, pressure P reduced to zero, first spool 3 automatically resets by spring 13, can guarantee working oil A mouth 12 pressure.

During the commutation pressure release, pressurized air is by gas source interface 15, promoting piston 9 drive spool thimbles 6 moves upward, promote spool second spool 4 earlier, internal pressure flows to drain tap T by spool second spool 4 edge oil grooves, and after internal pressure reduced, spool thimble 6 continued to promote spool 5 and moves upward, withstand first spool 3 up to spool 5, the P mouth is blocked.This moment, pressure oil passed through first spool, 3 edge oil grooves from working oil A mouth, and spool 5 edge oil grooves flow to draining T mouth 11, realized commutation.In case source of the gas mouth 15 stops air feed, piston 9 resets under spring 8 effects, and piston 9 drives the spool thimble and resets.

Claims

1. Pneumatic reversal valve, comprise valve body (1), valve pocket (2), first spool (3), spool thimble (6), nut (7), spring (8), piston (9), cylinder block (10), draining T mouth (11), working oil A mouth (12), pressure oil P mouth (14), gas source interface (15), valve body (1) offers working oil A mouth (12), pressure oil P mouth (14), and working oil A mouth (12) and pressure oil P mouth (14) communicate, valve body (1) is connected by screw with cylinder block (10), and piston (9) is arranged on the position that cylinder block (10) is established in advance, and spring (8) is on spool thimble (6), first spool (3) is arranged in the valve pocket (2), it is characterized in that, also comprise second spool (4), the 3rd spool (5), valve core spring (13), one end of valve core spring (13) is connected on first spool (3), second spool (4), and the 3rd spool (5) is arranged in the valve pocket (2).

2. Pneumatic reversal valve according to claim 1 is characterized in that, described valve pocket (2), first spool (3), second spool (4) and the 3rd spool (5) all are to contact by Sealing.

3. Pneumatic reversal valve according to claim 1 and 2 is characterized in that, described first spool (3) one sides have the edge oil groove.

4. Pneumatic reversal valve according to claim 1 and 2 is characterized in that, described the 3rd spool (5) one sides have the edge oil groove.