CN2484450Y

CN2484450Y - Double-piston coaxial two-position five-way stop valve

Info

Publication number: CN2484450Y
Application number: CN 01245745
Authority: CN
Inventors: 江明君; 高峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-03
Filing date: 2001-06-03
Publication date: 2002-04-03
Anticipated expiration: 2011-06-03

Abstract

The utility model relates to an electromagnetism reversing valve field. A double-piston and coaxial two-position five-way brake valve comprises a pilot valve, a control piston, an upper valve stem, a lower valve stem, an upper valve body, a lower valve body, an intermediate loose piece and a reset piston. The valve is characterized in that the upper valve stem, the lower valve stem, the pilot valve are mutually connected and fastened by a connecting bolt; an inner reversing framework is in float connection by the control piston, the upper valve stem, the down valve stem, the intermediate loose piece and the reset piston. The valve effectively solves a problem that is sensitive to a medium due to processing errors, which is a brake valve that has advantages of compact structure, reasonable function layout, easy processing and assembly and has certain values of popularization and application.

Description

Double-piston coaxial-type two-position five-way stop valve

The utility model relates to the solenoid directional control valve field, is a kind of double-piston coaxial-type two-position five-way stop valve.

At present, the kind of selector valve is varied, but more common be the slide column type guiding valve, it is to utilize a kind of cylindrical body with shoulder to move along its axis the valve of realizing the stream break-make in tubular valve.The major defect of this valve is that the spool sliding parts needs precision machining, has strengthened manufacture cost; Its commutation stroke is longer, is not suitable for the application of big latus rectum, big flow; It is relatively responsive to medium, if aspects such as the filtration of pneumatic system, lubricated, maintenance are dealt with improperly, will reduce the working life of valve, causes the action of valve malfunctioning.In order to solve these shortcomings of slide column type guiding valve, stop valve also just arises at the historic moment, can mainly contain two kinds by stop valve (two-position five-way) relatively more commonly used at present: a kind of is exactly to utilize two two-position three way stop valves (normal open, one is normally closed) two-position five-way stop valve of composition, it adopts twin axle, and volume is big, cost is high, commutation ability is not good enough; Another kind is exactly the slide column type stop valve, it is to have adopted general single valve core structure, thus it between the valve port of valve body and the valve port and the shoulder of spool and the axial dimension between the shoulder require relatively stricter, as the large quantities of generations of need, need select special device for use, thereby can not get extensive use.

The purpose of this utility model is, provides a kind of processing that is easy to related domain, and cost is lower, adapt to the stronger double-piston coaxial-type two-position five-way stop valve of ability, and make its compact structure, function distribution rationally, be easy to apply.

Above-mentioned purpose is achieved in that this valve has adopted the structure of valve body up and down in appearance, shortens the axial processing dimension of valve body, and helps the processing of valve port; Inner changement adopts pair of control piston, a pair of return piston, middle loose piece, the unsteady connection of lower valve rod in the utilization and forming.This connecting mode is broken through the changement of the single spool of traditional stop valve, not only overcome defectives such as valve body and spool difficulty of processing height, but also in the commutation process of valve the automatic every error of compensation, comprise machining error and do not influence the realization of its function.When coil not electric before or do not start hand push button before, reset atmospheric pressure and spring force of return piston utilization sealed valve port; When coil electricity or start hand push button,, overcome spring force and atmospheric pressure and move so control piston can promote return piston, thereby realized commutation function because the area of control piston is bigger than the area of return piston.This valve all is provided with seal element at relevant position, so its favorable sealing property.

This valve (the commutation stroke is short, negotiability strong, adopt soft plane sealing, reveals fewly, and the wearing and tearing of shutter member are little, to the filtration of source of the gas less demanding etc.) except that the general characteristics with general stop valve also has the advantage of himself uniqueness;

1) valve rod, piston, loose piece coaxial structure have been adopted in this valve inside, make its compact structure, are active in one's movements.

2) its inner changement has adopted the unsteady connecting mode of valve rod, piston, loose piece, has the error adaptive ability.

3) adopt the structure of valve body up and down in appearance, made its processing, assembling, convenient disassembly, greatly reduced manufacture cost.

Description of drawings:

Fig. 1 is the utility model plan view;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the right elevation of Fig. 1;

Fig. 4 is the plan view of Fig. 1;

Fig. 5 is the cutaway view Amplified image of the B-B of Fig. 4.

Sequence number explanation among the figure:

1, coil, 2, pilot valve, 3, upper valve body, 4, valve body down, 5, mounting hole, 6, connecting bolt, 7, nut, 8, snap ring, 9, connecting bolt, 10, control piston A, 11, control piston B, 12, upper valve rod, 13, middle loose piece, 14, lower valve rod, 15, return piston a, 16, return piston b, 17, base, 18, spring, 19, hand push button, 20, Y shape circle, 21, O shape circle, 22, plain cushion.

Referring now to above schematic representation, its feature is further described: double-piston coaxial-type two-position five-way stop valve is by coil, pilot valve, control piston A, control piston B, upper valve body, following valve body, upper valve rod, lower valve rod, middle loose piece, return piston a, return piston b, spring, base, compositions such as snap ring, it is characterized in that by upper valve body 3, following valve body 4, pilot valve 2 is connected and fixed with connecting bolt 6 and connecting bolt 9 respectively each other, inner changement is by control piston A10, control piston B11, upper valve rod 12, lower valve rod 14, middle loose piece 13, return piston a15, return piston b16 constitutes, wherein control piston A and control piston B are empty overlaps, the empty cover of return piston a and return piston b, middle loose piece is by upper valve rod, lower valve rod is respectively with control piston A, control piston B, return piston a, return piston b floats and connects, and wherein is equipped with Y shape circle 20 and O shape circle 21 at each relevant position.Control piston A10, control piston B11, middle loose piece 13, return piston a15, return piston b16, upper valve rod 12, lower valve rod 14 all are arranged on the same axis.

Working principle: coil not electric before, pilot valve is closed, return piston a, return piston b utilize spring force and atmospheric pressure effect and move to left, and P, A are communicated, B, 0 ₁Communicate; Behind the coil electricity, pilot valve is opened, and utilizes control piston and return piston to be subjected to the difference of atmospheric pressure active area, makes return piston overcome spring and atmospheric pressure and moves to right, and P, B is communicated, A, 0 ₂Communicate, thereby realized commutation function.

Claims

1, double-piston coaxial-type two-position five-way stop valve is by coil, pilot valve, control piston A, control piston B, upper valve body, following valve body, upper valve rod, lower valve rod, middle loose piece, return piston a, return piston b, spring, base, compositions such as snap ring, it is characterized in that by upper valve body (3), following valve body (4), pilot valve (2) uses connecting bolt (6) and connecting bolt (9) to be connected and fixed each other respectively, inner changement is by control piston A (10), control piston B (11), upper valve rod (12), lower valve rod (14), middle loose piece (13), return piston a (15), return piston b (16) constitutes, wherein control piston A and control piston B are empty overlaps, the empty cover of return piston a and return piston b, middle loose piece is by upper valve rod, lower valve rod is respectively with control piston A, control piston B, return piston a, return piston b floats and connects, and wherein is equipped with Y shape circle (20) and O shape circle (21) at each relevant position.

2, according to claims 1 described double-piston coaxial-type two-position five-way stop valve, it is characterized in that control piston A (10), control piston B (11), middle loose piece (13), return piston a (15), return piston b (16) upper valve rod (12), lower valve rod (14) all are arranged on the same axis.