CN2276014Y - Pneumatic controlled multifunctional hydraulic lift valve - Google Patents
Pneumatic controlled multifunctional hydraulic lift valve Download PDFInfo
- Publication number
- CN2276014Y CN2276014Y CN 96227141 CN96227141U CN2276014Y CN 2276014 Y CN2276014 Y CN 2276014Y CN 96227141 CN96227141 CN 96227141 CN 96227141 U CN96227141 U CN 96227141U CN 2276014 Y CN2276014 Y CN 2276014Y
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- valve body
- chamber
- valve
- oil
- spool
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- Expired - Fee Related
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Abstract
The utility model relates to a pneumatic controlled multifunctional hydraulic lift valve. The utility model is characterized in that a valve core (2) penetrates a whole valve body (1) through a middle shaft direction of an inner cavity (D), the inner end of the valve core (2) is extended to an air chamber (K) inside and is connected and fitted with a gas piston (7), and the outer end is extended to the valve body (1) outside; the valve core (2) is provided with a conical head distance adjusting screw (14), the middle part is provided with a truncated cone, and a restoring spring (3) is used for tightly propping and plugging an opening of an oil returning chamber (d); a safety overflow structure is formed by the oil returning chamber (d) and an oil returning hole (B) of the valve body (1), the return spring (3), and the valve core (2) being combined. The utility model has the advantages of good sealing effect and high safety. The utility model has the functions of lifting topside limit and automatic reset, and can play the comprehensive actions of lift valves, limit valves, overflow valves. The utility model is suitable for being matched with various hydraulic lifting system of dump cars.
Description
The utility model belongs to the lifting valve of car hydraulics.
The present used lifting valve of dumping truck, the advanced air control lifting valve that Luzhou hydraulic part factory and Linqing Special-purpose Automobile Factory's production are arranged, Austria's " Steyr " automobile hydraulic control lifting valve etc., mainly form by reversing arrangement, safety device, control setup, be used for the automobile hydraulic hoisting system, realize the Vehicle tipping function.Though these lifting valves can guarantee normal operation, save manpower and time, but also there is common shortcoming, as: 1. during the lorry loading overload, open the safety-valve the sealed steel ball swing of under oil pressure and the effect of spring force two sides, rolling, collision valve seal band, sealing band is damaged produce internal leakage, reduce pressure, make valve lose the lifting function; 2. the gas piston does not have auto-reset function, has only to push piston open by compartment own wt pressure and carry out oil return, and under normal oil pressure, it is slower often to descend, even loses the decline function.In addition, when the automobile power takeoff broke down, pump delivery was big, and spill pressure oil is few, and remaining oil pressure can make the empty wagons bucket lift, and causes train operation accident easily; Vehicle hoisting stops lifting to top control, need add limit valve in addition.(see the Linqing car manufacturer for details and produce JFI air control lifting valve.)
The purpose of this utility model just provides a kind of multi-functional lifting valve of new construction, improves reliability, reduces internal leakage, improves safety device, guarantees the lifting performance, realizes automatically reseting and giving rise to the top limit function.
Task of the present utility model is finished like this: design and produce a kind of gas control multifunction hydraulic lifting valve, be made up of valve body (1), spool (2), retracing spring (3), gas piston (7), cylinder (9), sealing arrangement, safety gear etc.It is characterized in that spool (2) by inner chamber (D) tween drive shaft to running through whole valve body (1), the inner of spool (2) extends in the air chamber (K) that cylinder (9) and valve body (1) large end face be connected to form and with gas piston (7) and is connected cooperation, the outer end passes oil revolute chamber (d) and pilot hole (H) extends outside the valve body (1), spool (2) middle part has frustum, holds out against shutoff oil revolute chamber (d) mouth by retracing spring (3).Sealing arrangement is made up of jam nut (5), orienting sleeve (4) and each seal ring (11), is installed in the big inner chamber of holding (D) of valve body (1) and seals inner chamber (D), makes air chamber (K) and inner chamber (D) isolated.Safety gear is a hydraulic pressure overflow version, is cooperated with retracing spring (3), spool (2) and is formed by oil revolute chamber (d), the fuel return hole (B) of valve body (1).Valve body (1) inside has inner chamber (D), oil revolute chamber (d), pilot hole (H) and connects and connects, have fuel feed hole (A), oil outlet (B), induction opening (C) on the surperficial boss of valve body (1), difference communication with cavity (D), oil revolute chamber (d), air chamber (K), and connect oil inlet, oil outlet pipe, air inlet pipe respectively, deflation hole (E) on cylinder (9) forms gas circuit and oil circuit.Cylinder (9) is fixed on valve body (1) large end face by screw (8), and shutoff inner chamber (D) mouth forms air chamber (K) in cylinder (9).Spool (2) stretches out on the outer face of valve body (1) and has screw, and connection conehead roll adjustment screw (14) is locked by setscrew nut (13).Adjust conehead roll adjustment screw (14), can play the position-limiting action of control oil cylinder lift height.Principle of work of the present utility model is: start oil pump and open air valve, pressurized air in the air chamber (K) is discharged by air valve, spool (2) spring (3) that is reset withstands frustum shutoff oil revolute chamber (d) mouthful, make the isolated sealing of inner chamber (D) and oil revolute chamber (d), the pipeline that pressure oil is communicated with through fuel feed hole (A) enters oil cylinder and realizes the lifting action.After lifting puts in place, oil cylinder tilts to touch the conehead roll adjustment screw (14) of spool (2) outer end, promotes spool (2) and make axial translation in valve body (1), and frustum leaves oil revolute chamber (d) mouth, pressure oil in valve body (1) inner chamber (D) enters oil revolute chamber (d), stops lifting and realizes spacing.When needing to descend, close oil pump earlier and close gas check valve again, pressurized air enters air chamber (K) promotion gas piston (7) and moves to cylinder (9) bottom, drive spool (2) to air chamber (K) translation, inner chamber (D) is communicated with oil revolute chamber (d), pressure oil enters oil outlet pipe by oil revolute chamber (d), oil cylinder is descended reset.If the overload phenomenon in the lifting working process, occurs, pressure oil promotes the pressure of the pressure of spool (2) frustum above retracing spring (3) in the inner chamber (D), spool (2) is to cylinder (9) direction translation, frustum leaves oil revolute chamber (d), remove the sealing of oil revolute chamber (d) mouth, pressure oil flows to oil revolute chamber (d) from inner chamber (D), produces overflow phenomena.Flow is big more, and spool (2) translational movement is big more, and inner chamber (D) is big more with the opening that oil revolute chamber (d) is communicated with, and it is just many more that pressure oil flows to oil revolute chamber (d), can play the overflow safety effect effectively.
Make, handle the utility model according to above-mentioned design and principle of work, the proof good sealing effect, reduce internal leakage greatly, improved reliability of service, when overload, overflow safety device can guarantee safe in utilization, has realized that simultaneously lifting puts in place spacing and auto-reset function, have the advantages that to integrate lifting valve, limit valve and each function of by pass valve, reached preferably and given the meter target.
Below accompanying drawing is illustrated.
Fig. 1 is the utility model assembling section;
Fig. 2 is existing air control lifting valve assembling section.
Among the figure, 1-valve body, 2-spool, 3-retracing spring, 4-orienting sleeve, 5-jam nut, 6-QY seal ring, 7-gas piston, 8-screw, 9-cylinder, 10-big cap screw, 11-O RunddichtringO, 12-dust cap, 13-nut, 14-conehead roll adjustment screw, 15-former cylinder, 16-former piston, 17-end cap, 18-former valve body, 19-overflow steel ball, 20-spring, 21-spring perch, 22-commutation steel ball; A-fuel feed hole, B-oil outlet, C-induction opening, D-inner chamber, E-deflation hole, d-oil revolute chamber, H-pilot hole, K-air chamber.
The utility model is described in further detail by embodiment at last.
Trial-production is the supporting gas control multifunction hydraulic lifting valve of the 9 tons of dumping cars in the Yellow River, be used with HG57 hydraulic lifting cylinder, valve body adopts the QT500 ductile cast iron material, the outside mills out lower plane, processes 38mm inner chamber successively with combined drill, dark 75mm, the internal diameter 21mm of oil revolute chamber, long 30mm, guiding aperture 20mm, interior accent machining screw M40 * 1.5mm matches with jam nut.Spool is selected the 45# steel for use, the core bar of car growth 190mm, and the equal tapping of both ends of the surface processes internal thread hole, and big cap screw and conehead roll adjustment screw are installed respectively.The conical surface of spool middle part frustum carries out surface high frequency quenching heat treatment HRC50～55.During assembling spool is stretched out the valve body small end by the big end inner chamber of valve body place perforation oil revolute chamber and pilot hole, the outer suit retracing spring of spool, hold out against frustum and block oil revolute chamber's mouth, the retracing spring back refills into orienting sleeve, be locked at body cavity mouth place by jam nut, by big cap screw the gas piston be fixed on the spool end then.Screw with M6 gets lodged in the cylinder fixed sealing on the valve body large end face at last, and the gentle piston external diameter of b all is 55mm, and suit QY seal ring, makes the gas piston closes in cylinder.Valve body into and out of oilhole be communicated with into and out of oil pipe, induction opening is communicated with air inlet pipe, forms oil circuit and gas circuit, can cooperate the composition hydraulic lifting system with oil pump, air valve, air storage bag, oil cylinder etc., starts working according to job procedure.Choosing of retracing spring according to formula
(d
1 2-d
2 2) ρ draws spring maximum pressure P, more by formula
Determine the diameter of spring.D in the formula
1Be stem diameter, d
2Be oil revolute chamber's internal diameter, K, C are coefficient, and [τ] is the material permissible stress, and ρ is oil pressure/cm
2Calculate and determine that spring diameter is 4.5mm.During service testing, gas control multifunction hydraulic lifting valve is installed on the vehicle frame, and air valve is installed on the front panel of operator's compartment, and the air valve air gate is connected with sebific duct with this valve induction opening, and the induction opening that air storage contracts out tracheae and air valve joins.This valve fuel feed hole is communicated with oil pipe with oil pump, and oil outlet is communicated with fuel tank with oil pipe.10 tons of actual load loads, the pulling handle is realized lifting, oil cylinder is met this valve cone head roll adjustment screw when giving rise to the top, the inside translation of spool, the hydraulic pressure overflow device starts, and realizes spacing off-load effect.Test descends, in stop every function, the reaction time only can realize about 1 second.This valve combines the multiple function of limit valve, lifting valve, by pass valve, has reduced internal leakage, has improved safety, guarantees to satisfy job requirement, and effect is more satisfactory.Make this valve cost and do not improve, profit reaches 30～40%, can save limit valve and be worth 280 yuan, and pipeline is saved 80 yuan, and economic benefit and social benefit are all very considerable.Gas control multifunction hydraulic lifting valve is suitable for various dumping truck hydraulic efficiency pressure systems, has good promotion prospect.
Claims (3)
1, a kind of gas control multifunction hydraulic lifting valve, by valve body (1), spool (2), retracing spring (3), gas piston (7), cylinder (9), sealing arrangement, compositions such as safety gear, it is characterized in that spool (2) by inner chamber (D) tween drive shaft to running through whole valve body (1), the inner of spool (2) extends in the air chamber (K) that cylinder (9) and valve body (1) large end face be connected to form and with gas piston (7) and is connected cooperation, the outer end passes oil revolute chamber (d) and pilot hole (H) extends outside the valve body (1), the middle part has frustum, hold out against shutoff oil revolute chamber (d) mouth by retracing spring (3), sealing arrangement is installed in the big inner chamber of holding (D) of valve body (1) and seals inner chamber (D), make air chamber (K) and inner chamber (D) isolated, safety gear is a hydraulic pressure overflow version, by the oil revolute chamber (d) of valve body (1), fuel return hole (B) and retracing spring (3), spool (2) cooperates to be formed.
2, according to the described gas control multifunctional solution of claim 1 lifting valve, it is characterized in that said valve body (1) inside has inner chamber (D), oil revolute chamber (d), pilot hole (H) and connects perforation, have fuel feed hole (A), oil outlet (B), induction opening (C) on the surperficial boss of valve body (1), respectively communication with cavity (D), oil revolute chamber (d), air chamber (K).
3,, it is characterized in that said spool (2) stretches out on the outer face of valve body (1) and have screw that connection conehead roll adjustment screw (14) is locked by setscrew nut (13) according to the described gas control multifunction hydraulic of claim 1 lifting valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96227141 CN2276014Y (en) | 1996-01-31 | 1996-01-31 | Pneumatic controlled multifunctional hydraulic lift valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96227141 CN2276014Y (en) | 1996-01-31 | 1996-01-31 | Pneumatic controlled multifunctional hydraulic lift valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2276014Y true CN2276014Y (en) | 1998-03-11 |
Family
ID=33905334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96227141 Expired - Fee Related CN2276014Y (en) | 1996-01-31 | 1996-01-31 | Pneumatic controlled multifunctional hydraulic lift valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2276014Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996433A (en) * | 2012-10-31 | 2013-03-27 | 镇江宝城注浆设备有限公司 | Grouting pump safety valve |
-
1996
- 1996-01-31 CN CN 96227141 patent/CN2276014Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996433A (en) * | 2012-10-31 | 2013-03-27 | 镇江宝城注浆设备有限公司 | Grouting pump safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |