CN2913704Y

CN2913704Y - Diverter valve

Info

Publication number: CN2913704Y
Application number: CN 200620114590
Authority: CN
Inventors: 隋宝臣; 韩梦跃
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-09
Filing date: 2006-05-17
Publication date: 2007-06-20
Anticipated expiration: 2016-05-17

Abstract

The utility model provides a reversing valve, including a valve body and a valve core. The valve body comprises a 1st oil return slot and a 2nd oil return slot; the 1st oil return slot goes through the 2nd oil return slot; the 1st oil return slot is connected with the scavenge port; the valve body provides a 1st feed slot and a 2nd feed slot; the 1st feed slot is connected with the 2nd feed slot; the valve body comprises an overfill slot; the valve body provides a check valve; a cylinder, in which a reversing piston is installed, is mounted on the right end of the valve body; the cylinder provides an air-down vent and an air-up vent, on the right end of which, a cylinder end cover is installed; a position end cover is installed on left end of the valve body; in the positioning end cover, a spring seat is installed, on which a resetting spring is mounted. The utility model can fulfill pneumatic & hydraulic control, in order to push the valve core with air pressure and divert fluid flow direction. Therefore, the valve has the advantages of reasonable overall structure design, simple structure, reliable reversing and sensitive action and so on.

Description

Selector valve

Technical field

The utility model relates to dump truck HYDRAULIC CONTROL SYSTEM parts, is a kind of selector valve.

Background technique

The selector valve that uses in existing dump truck or the oil cylinder hydraulic system has more multiple structure, but all have some deficiency: design function owes complete, hydraulic pressure reversing impact power is bigger, compartment, car body is snapped permanent deformation occurs, and then influence the working life of dumping car; The total system safety protection is not good enough, can cause the damage of pump, valve, pipeline, oil cylinder car body when pressure limit, even major accident etc.

Summary of the invention

The purpose of this utility model is, a kind of selector valve is provided, and by gas-liquid control, promotes spool with air pressure, thereby the transfer liquid flow direction makes that the overall construction design of valve is reasonable, simple for structure, commutation is reliable, be active in one's movements etc.

The utility model for achieving the above object, be achieved through the following technical solutions: selector valve, comprise valve body and spool, offer first oil-return groove and second oil-return groove on the valve body, first oil-return groove and second oil-return groove communicate, and first oil-return groove and return opening join, and offer first oil-feed tank and second oil-feed tank on the valve body, first oil-feed tank and second oil-feed tank communicate, offer on the valve body and unload oil groove, one-way valve is installed on the valve body, the valve body right-hand member is installed cylinder, reversing piston is installed in the cylinder, offer decline gas port and lifting gas port on the cylinder, the cylinder right-hand member is installed cylinder end piece, the left end installing and locating end cap of valve body, mounting spring seat in the end cap of location is installed Returnning spring on the spring seat.Speed adjustment screw is installed on the cylinder end piece, and speed adjustment screw is connected with speed-regulating piston.Safety valve is installed on the valve body.The cylinder space washer is installed in valve body right-hand member and cylinder joint.Offer annular balancing slit on the spool, balancing slit is positioned at the enterprising side that goes out oil groove of valve body.Balancing slit is made up of three road circular grooves, and the per pass groove width is the 0.4-0.5 millimeter.The centre of spool is provided with the cone joint head piece.Offer the semicircle dashpot of four symmetries on the end face of spool middle bench.The cylinder right-hand member is offered slow sending down abnormally ascending mouth.

The utility model has the advantages that: promote the purpose that spool reaches the conversion fluid flow direction with air pressure, the overall construction design of valve is reasonable, and is simple for structure, and commutation is reliable, is active in one's movements, and is easy for installation; Revolve oil pump about having realized and can use the purpose of a selector valve simultaneously, easy to use; Hydraulic pressure reversing impact power is little, can prolong the working life of dumping car; Can realize body of tipper carriage lifting, in the function of stopping, falling soon and slowly descending; Can reduce between spool and the valve body contact wearing and tearing, prolong the working life of valve, and can reduce the leakage of oil amount etc. of internal drainage.

Description of drawings

Accompanying drawing 1 is the utility model structural representation.

Embodiment

1 is valve body among the figure, the 2nd, spool, offer the first oil-return groove T1 and the second oil-return groove T2 on the valve body 1, the first oil-return groove T1 and the second oil-return groove T2 communicate, the first oil-return groove T1 and oil return inlet T are joined, offer the first oil-feed tank P1 and the second oil-feed tank P2 on the valve body 1, the first oil-feed tank P1 and the second oil-feed tank P2 communicate, and offer on the valve body 1 and unload oil groove A0, one-way valve 10 is installed on the valve body 1, valve body 1 right-hand member is installed cylinder 4, and reversing piston 8 is installed in the cylinder 4, offers decline gas port I and lifting gas port II on the cylinder 4, cylinder 4 right-hand members are installed cylinder end piece 6, the left end installing and locating end cap 11 of valve body 1, mounting spring seat 13 in the end cap 11 of location is installed Returnning spring 12 on the spring seat 13.The function of the utility model in order to realize self-discharging carriage is slowly descended, speed adjustment screw 5 can be installed on the end cap 6 of cylinder 4, speed adjustment screw 5 is connected with speed-regulating piston 7, and offer slow sending down abnormally ascending mouth III at cylinder 4 right-hand members, when the needs compartment slowly descends, decline gas port I and slow sending down abnormally ascending mouth III air inlet simultaneously, speed-regulating piston 7 is moved to the left, reversing piston 8 moves right, when reversing piston 8 moved to whole process and is about two/one stroke, spacing by speed-regulating piston 7, cone joint head piece K stroke was to the crack position of unloading oil groove A0, hydraulic oil flows back to fuel tank by cone joint head piece K, and realize that the compartment slowly descends this moment.Rotation speed adjustment screw 5 may command compartment rate of descent.The utility model is in order to realize the overload protection; safety valve 3 can be installed on valve body 1; the structure of safety valve 3 is known configurations; safety valve 3 is installed in the bottom of valve body 1; the time hydraulic fluid port of safety valve 3 communicates with filler opening p; the flow-off of safety valve 3 communicates with oil return inlet T; when mechanical stuck fault appears in hydraulic system for some reason; oil pressure raises when surpassing the pressure of safety valve 3 pilot poppet valve core y adjusting in the oil inlet P chamber of hydraulic system; pilot poppet valve core y is open; oil pressure descends in the main valve plug cavity of resorption W in the safety valve 3; produce pressure reduction with the oil inlet P chamber, oil inlet P chamber oil pressure promotes main valve plug X and moves to right, and flow-off is opened; the hydraulic oil flow oil sump tank prevents that system element from damaging and the generation of accident thereby reached.The utility model is in order to reduce the contact wearing and tearing between spool 2 and the valve body 1, and the leakage of oil amount of minimizing internal drainage, on spool 2, offer annular balancing slit f, balancing slit f generally is positioned at a side of oil-feed tank on the valve body 1, and balancing slit f has circular groove at least one, and 2-3 road circular groove is set usually, the width of per pass groove is that the 0.4-0.5 millimeter is better, certainly, be provided with one oil groove also can, but its effect is poor slightly.These balancing slits f can make hydraulic oil enter back, spool 2 surface and form surface tension, reaches the contact wearing and tearing that reduce between spool 2 and the valve body 1, and reduces the purpose of the leakage of oil amount of internal drainage.The utility model is the impact force when further reducing commutation, also cone joint head piece k can be set at the middle part of spool 2, offers the semicircle dashpot m of two or four symmetries on the end face of spool 2 middle benches, and the dashpot effect of four symmetries is better.The utility model is in order to make installation and maintenance convenient, and at valve body 1 right-hand member and cylinder 4 joints installation cylinder space washer 9, the not fragile seal ring of this structure can prolong working life of seal ring.Five road oil grooves described in the utility model are symmetrical oil groove, adopt the casting method manufacturing, do not need machining, can reduce manufacture cost.Cylinder ports A connects elevating ram shown in the utility model accompanying drawing, and oil inlet P connects oil pump, and one-way valve 10 is divided into top cylinder ports A, two cavitys of bottom oil inlet P with oil duct, and the passage of hydraulic oil is by one-way valve 10 opening and closing.The utility model oil-feed tank mouth T0 is connected with fuel tank, and oil return inlet T is connected with oil pump.The first oil-feed tank P1 in the five road oil grooves and the second oil-feed tank P2 communicate and communicate with the oil inlet P chamber, and the first oil-return groove T1 and the second oil-return groove T2 communicate and communicate with the oil return inlet T chamber.During the utility model work, spool 2 mediated when sending down abnormally ascending mouth I and lifting gas port II died instantly, and oil inlet P and oil return inlet T communicate by the first oil-feed tank P1, the first oil-return groove T1, and oil directly flows back to fuel tank, system does not have pressure, and cylinder ports A closes in the chamber.When the compartment needs lifting, air pressure enters lifting gas port II promotion reversing piston 8 and is moved to the left, promoting spool 2 simultaneously moves to left, and compression reseting spring 12, oil inlet P and oil return inlet T are closed, from be opened to the stroke of closing, the semicircle dashpot m stroke of spool 2 is to the first oil-feed tank P1 oil groove during with closed position, and hydraulic oil transfers the semi-closed cone joint head piece k that continues to and progressively closes to end and close this slow closed procedure that closes.System pressure is progressively improved, solved moment when closing, system pressure increases the hydraulic shock that is brought suddenly, pushes one-way valve 10 open and flows into cylinder ports A chambeies along with the oil inlet P cavity pressure increases hydraulic oil, enters the elevating ram cavity of resorption.Make the compartment lifting.After lifting gas port II disconnected air pressure, Returnning spring 12 discharged spool 2 and resets, and one-way valve 10 is closed, and oil inlet P and oil return inlet T are communicated with the hydraulic oil flow oil sump tank.When vehicle need fall soon, slow sending down abnormally ascending mouth III air pressure disconnected, and reversing piston 8 is removed spacing, drove spool 2 and continued to move to right to total travel, and the oil that unloads oil groove A0 oil duct is through the restriction K on the spool 2, and semicircle dashpot m, to all opening oil sump tank.Among the figure, u is the damping hole on the safety valve, the 15th, and spring seat, the 16th, pressure regulation end cap.

Claims

1, selector valve, comprise valve body (1) and spool (2), it is characterized in that: offer first oil-return groove (T1) and second oil-return groove (T2) on the valve body (1), first oil-return groove (T1) and second oil-return groove (T2) communicate, first oil-return groove (T1) joins with return opening (T), offer first oil-feed tank (P1) and second oil-feed tank (P2) on the valve body (1), first oil-feed tank (P1) and second oil-feed tank (P2) communicate, offer on the valve body (1) and unload oil groove (A0), valve body (1) is gone up one-way valve (10) is installed, valve body (1) right-hand member is installed cylinder (4), reversing piston (8) is installed in the cylinder (4), offer decline gas port (I) and lifting gas port (II) on the cylinder (4), cylinder (4) right-hand member is installed cylinder end piece (6), the left end installing and locating end cap (11) of valve body (1), location end cap (11) interior mounting spring seats (13), spring seat (13) are gone up Returnning spring (12) are installed.

2, selector valve according to claim 1 is characterized in that: cylinder end piece (6) is gone up speed adjustment screw (5) is installed, and speed adjustment screw (5) is connected with speed-regulating piston (7).

3, selector valve according to claim 1 and 2 is characterized in that: valve body (1) is gone up safety valve (3) is installed.

4, selector valve according to claim 3 is characterized in that: cylinder space washer (9) is installed in valve body (1) right-hand member and cylinder (4) joint.

5, according to claim 1 or 4 described selector valves, it is characterized in that: offer annular balancing slit (f) on the spool (2), balancing slit (f) is positioned at the enterprising side that goes out oil groove of valve body (1).

6, selector valve according to claim 5 is characterized in that: balancing slit (f) is made up of three road circular grooves, and the per pass groove width is the 0.4-0.5 millimeter.

7, according to claim 1 or 4 described selector valves, it is characterized in that: the centre of spool (2) is provided with cone joint head piece (K).

8, selector valve according to claim 7 is characterized in that: the semicircle dashpot (m) of offering four symmetries on the end face of spool (2) middle bench.

9, selector valve according to claim 1 and 2 is characterized in that: cylinder (4) right-hand member is offered slow sending down abnormally ascending mouth (III).