CN88200016U

CN88200016U - Hand-operated rotating valve

Info

Publication number: CN88200016U
Application number: CN 88200016
Authority: CN
Inventors: 赵菊初
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-01-04
Filing date: 1988-01-04
Publication date: 1988-11-02

Abstract

The utility model belongs to the hydraulic pressure class and the pneumatic component class. The utility model provides the new structure of a manual two-position four-way rotating valve. After the manual two-bit four-way rotating valve is changed a little, the manual two-position four-way rotating valve can be changed into a two-position three-way valve, a two-position two-way valve or a three-position four-way valve which has the functions of various valves. The manual two-position four-way rotating valve is characterized in that the fluid pressure of a valve core can basically achieve the balance, so the operation force moment is extremely smaller than the rotating valve with the traditional structure. Simultaneously, the utility model adopts the additional sealing elements between the holes which are switched to cause the leakage quantity to be reduced the lowest level. Compared with the public manual rotating valve, the manual two-position four-way rotating valve also has the advantages of convenient operation, long service life, easy repair, etc.

Description

Hand-operated rotating valve

The utility model belongs to hydraulic pressure and pneumatic element class.

Known manual rotary valve has end face to distribute and the garden cylinder distributes two kinds of structural types.The manual rotary valve that end face distributes once was widely used in the commutation action of control cylinder before the fifties.For the self-alignment performance and the reduction requirement on machining accuracy that guarantee valve block, the valve block of this valve and valve rod all are to make separable structure.But therefore will make valve block be subjected to very big unbalanced hydrodynamic pressure, in addition since four valve openings usually along same circle distribution, topped again all four valve openings of valve block are so more strengthened this pressure.Thereby operation is very required great effort, valve block also weares and teares easily and scraps.In addition, all be that rigidity contacts usually between its valve block and the valve gap, added resilience seal ring not is not so sealability has ideal yet during as pneumatic element.Therefore, the manual rotary valve that distributes of end face manufacturer production seldom in recent years.But this valve shaft is the short and automatic compensate for wear gap of energy to length, is operating in some cases also than guiding valve conveniently.So still have the value of improving and existing.The utility model proposes for the structural behaviour of improving this valve.

Structural principle of the present utility model as shown in drawings.Part 8 is a rotary valve, and it constitutes an integral body by valve rod and fan-shaped valve block two-part.The hole of its valve rod and valve body 7 matches, and seals with elastic seal ring 4, and its outer end links to each other with handwheel 1, and fixing with jackscrew 2.The end face of its fan-shaped valve block end and valve gap 10 matches.Two hole a and b that are interconnected are made to have in fan-shaped valve block end.They communicate with O hole and A hole on the valve gap 10 respectively.Two holes are respectively with elastic seal ring 5 and 9 sealings.Like this, can be from the fluid in A hole by the coconnected orifice flow of rotary valve to the O hole; Fluid from the P hole then can directly flow to the B hole by the cavity between valve body and the valve gap.For preventing that seal ring 5 and 9 from clamp-oning in the hole under pressure, be respectively equipped with back-up ring 6 and 13.Valve gap 10 usefulness rubber rings 11 seal, and are connected with valve body 7 with screw 12.When rotary valve need switch, can the fan-shaped valve block of rotary valve and locating stud 15 be collided by the counter clockwise direction rotation hand wheel, the b hole on the rotary valve will communicate with the B hole so, and the A hole will communicate with the P hole.For the seal ring that prevents the b hole when switching by limit, the hole scratch in A hole or B hole, need this two bore ends make dish mouthful.Nut 3 can be fixed on rotary valve on the instrument panel shown in the imaginary line.

When this rotary valve during as pneumatic valve, the O hole exits can be adorned silencing apparatus.

This rotary valve is compared with traditional rotary valve has following advantage:

1, fan-shaped valve block and valve rod are integral, and make the suffered hydrodynamic pressure of fan-shaped valve block reach balance substantially so can change stem diameter.Operation is very light when therefore switching.The latus rectum of the 23JR3-L6-Z1 type two-position three way knob selector valve of market supply now is φ 6, and working pressure is 0～8kg/cm ², moment is big but its operational torque reaches 0.5kg-M, could rotate and need establish long operating grip.The operational torque of this rotary valve can drop to below the 0.1kg-M and facts have proved, when working under mesolow, just can operate freely by less handwheel.

When 2, this valve is under low pressure worked, can adopt the elastic seal ring sealing, can eliminate fully and sew phenomenon.Only need change cheap seal ring during wearing and tearing and can recover sealability.In when depressing work, the place can adopt mechanical sealing element in the b hole, also can reach higher sealability and wear resistance.

Claims

1, a kind of manual rotary valve of two-position four-way of end face distribution, it comes existing switching effect by the rotation of spool.It is characterized in that spool topped two valve openings of while when the working position, and one of them valve opening is positioned near the valve rod axis.

2, rotary valve as claimed in claim 1 is characterized in that fan-shaped valve block and valve rod are integral.

3, rotary valve as claimed in claim 1 is characterized in that the hole A and the B that are switched adopt additional seal ring element between valve block and valve gap.

4, rotary valve as claimed in claim 1 is characterized in that the hole A that is switched and B when valve block and valve gap one side adopt elastomer seal, the valve opening of corresponding opposite side made dish mouthful.