CN202431635U - Speed-regulating pneumatic control reversing valve for protecting whole system - Google Patents
Speed-regulating pneumatic control reversing valve for protecting whole system Download PDFInfo
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- CN202431635U CN202431635U CN2011205238215U CN201120523821U CN202431635U CN 202431635 U CN202431635 U CN 202431635U CN 2011205238215 U CN2011205238215 U CN 2011205238215U CN 201120523821 U CN201120523821 U CN 201120523821U CN 202431635 U CN202431635 U CN 202431635U
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Abstract
The utility model relates to a speed-regulating pneumatic control reversing valve for protecting a whole system, which can effectively protect all the hydraulic elements in the system. The speed-regulating pneumatic control reversing valve comprises a valve body, a slide sealing valve element, a front spring sleeve, a resetting spring, a rear spring sleeve, a piston, a control cylinder, a slowly-falling cylinder and overflow valves, wherein two sets of independent overflow valves, a protective hydraulic cylinder overflow valve and a protective hydraulic pump overflow valve are mounted on the valve body; a high-pressure oil input channel and a high-pressure oil output channel are arranged in the valve body; an oil pressure input port of the protective hydraulic pump overflow valve is communicated with the high-pressure oil input channel of the valve body; the oil pressure input port of the protective hydraulic cylinder overflow valve is communicated with the high-pressure oil output channel of the valve body; oil return channels of the protective hydraulic cylinder overflow valve and the protective hydraulic pump overflow valve are communicated with a system oil tank; a slowly-falling combined control air valve is mounted together with a front jacking oil tank, so as to realize the slow falling; and a proportional control air valve also can be mounted for realizing the random adjustment for the falling speed of a compartment. The speed-regulating pneumatic control reversing valve has the characteristics of simple structure, small volume, light weight, high strength, low cost and safe and reliable property.
Description
Technical field
The utility model relates to dump truck HYDRAULIC CONTROL SYSTEM technical field, exactly is a kind of all system protection speed governing Pneumatic reversal valve.
Background technique
At present domestic and international application in dump truck accomplish the compartment lifting, in stop, the Pneumatic reversal valve of decline HYDRAULIC CONTROL SYSTEM mainly contains two kinds, a kind of is the Pneumatic reversal valve that the band constant speed is fallen slowly, another kind is the Pneumatic valve that the band ratio is fallen slowly.Their common shortcomings are 1, function singleness; Can only constant speed fall slowly or can only ratio fall slowly.2, an overflow Protective valve only is set; Setting stress to protect the input hydraulic pressure pump after the compartment lifting in the stopping time can not protect oil cylinder, stress to protect when fault card valve, can not protecting of output hydraulic jack and be provided with to the oil hydraulic pump overload.So can not realize omnibearing overpressure protection to hydraulic system.
Summary of the invention
The purpose of the utility model will overcome above-mentioned defective exactly; A kind of variable-speed Pneumatic reversal valve of all system protection is provided; The selector valve of the utility model can have above-mentioned two kinds of valves simultaneously on a valve body constant speed falls function slowly and function falls in ratio slowly, also is provided with the load (oil cylinder) that connects to the C mouth and is connected two relief valves protecting respectively that pressure is imported two each working state of aspect of (oil pump) with the P mouth.
The technological scheme that the utility model adopts:
The purpose of this practical model utility will overcome above-mentioned defective exactly; A kind of all system protection speed governing Pneumatic reversal valve is provided; Be mainly used in and replace existing Pneumatic reversal valve; When having each item function of system works, omnibearing each parts of effective protective system of ability make whole system safety, effective, long-life operation.All system protection speed governing Pneumatic reversal valve; Comprise valve body, slipper seal spool, O RunddichtringO, circlip for shaft, front spring cover, reset spring, rear spring cover, piston, control cylinder, control cylinder lid, slow sending down abnormally ascending cylinder cap, relief valve sleeve, cylinder setting sleeve, relief valve spring, relief valve ball seat, steel ball, inclined-plane pressure head, slowly fall cylinder, piston, oil hydraulic cylinder relief valve, oil hydraulic pump relief valve fall slowly; It is characterized in that: be equipped with two on the valve body and overlap independently relief valve, protection oil hydraulic cylinder relief valve and protection oil hydraulic pump relief valve; Valve inner is provided with high pressure oil input channel P, high pressure oil output channel C; The oil pressure inlet opening B of protection oil hydraulic pump relief valve is communicated with the high pressure oil input channel P of valve body; The oil pressure inlet opening A of protection oil hydraulic cylinder relief valve is communicated with the drainback passage F connected system fuel tank of oil hydraulic pump relief valve and oil hydraulic cylinder relief valve with the high pressure oil output channel C of valve body.The rising inlet hole D at control cylinder middle part and the decline inlet hole H on the cylinder head, the piston between the two are formed pneuamtic part, and are had ratio decline groove K at the slipper seal spool.Rising inlet hole D is connected with manual proportional pneumatic control valve with decline suction port H.Slowly falling control cylinder bottom falls inlet hole M slowly and is contained on the cylinder head; The Pneumatic valve of function falls in connecting band constant speed slowly when selector valve is in the decline state of a control, starts to fall slowly to make the air inlet of M pore promote to fall slowly piston to make the slipper seal spool be fixed on constant speed to fall slowly and realize on the position that function falls in constant speed slowly.Oil hydraulic cylinder relief valve and oil hydraulic pump relief valve (they are made up of relief valve sleeve, relief valve spring, relief valve valve seat, steel ball, inclined-plane pressure head).
The utility model has the advantages that:
Through being all system protection speed governing Pneumatic reversal valve of dump truck design of Hydraulic System, replaced existing two kinds of selector valves, a kind of is the slow releasing pneuamtic controlled distributing valve, another kind is to have ratio slow releasing pneuamtic controlled selector valve.Satisfied the complicated applying working condition of dumping car, made each original paper of hydraulic system comprise oil hydraulic pump, oil hydraulic cylinder, hydrovalve and connecting pipeline thereof are effectively protected, thereby each unit failure rate is descended, and effectively carry out function separately.Prolonged the dump truck hydraulic system life-span, performance is safe and reliable.This valve can cooperate the sinciput fuel tank, can install to come down to a lower group slowly and close one control air valve, realize falling slowly, but also proportion of installation one control air valve realization compartment rate of descent is regulated arbitrarily.Have simple in structure, volume is little, in light weight, intensity is high, cost is low, performance is safe and reliable characteristics.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is selector valve schematic representation when card valve fault takes place, in this moment high pressure oil input channel P as input hydraulic pressure oil then pressure can infinitely raise, oil hydraulic pump relief valve 21 can carry out overflow protection to system.
3 is seal rings among the figure.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described in detail.
The utility model is equipped with two and overlaps independently relief valve, can effectively protect each hydraulic pressure original paper of internal system.This valve can be installed to come down to a lower group slowly and close one control air valve, realize falling slowly, but also proportion of installation one control air valve realization compartment rate of descent is regulated arbitrarily.
It comprises control cylinder 9 and the setting sleeve 11 that valve body 1, control hydrovalve open and close the utility model as shown in Figure 1; Switching-over valve body 1 inside is provided with slipper seal spool 2 high pressure oil input channel P, high pressure oil output channel C; Drainback passage mouth F, reset spring 6, oil hydraulic pump relief valve 21, oil hydraulic cylinder relief valve 20 is by (12 relief valve sleeve, 13 relief valve springs, 14 relief valve valve seats, 15 steel balls, 16 inclined-plane pressure heads are formed).Be provided with successively on the slipper seal spool 2 and relatively and axial alternately the cylindrical seal face of oil transportation control channel mouth and high pressure oil input channel mouth, drainback passage mouth; Reset spring 6 is set on the slipper seal spool 2 in the inboard of front spring cover 5 with rear spring cover 7; With 4 lockings of two circlips for shaft; Piston 8 is loaded on the slipper seal spool 2; The oil pressure inlet opening B of oil hydraulic pump relief valve is communicated with the high pressure oil input channel P of valve body 1, and the oil pressure inlet opening A of oil hydraulic cylinder relief valve is communicated with the high pressure oil output channel C of valve body 1, and the drainback passage F of oil hydraulic pump relief valve is communicated with the drainback passage F of oil hydraulic cylinder relief valve.Oil hydraulic pump relief valve 21, oil hydraulic cylinder relief valve 20 comprise oil hydraulic pump to each original paper of hydraulic system respectively, oil hydraulic cylinder, and hydrovalve and connecting pipeline thereof are effectively protected. and 2 slipper seal spools are provided with throttling endless belt K.
The control cylinder is by rising inlet hole D that is opened in the control cylinder middle part and the decline inlet hole H on the cylinder right end cap 10, and air cavity that is communicated with rising inlet hole D and the piston of being located between control cylinder 9 chambers upper end and the cylinder head upper-end surface 8 are formed.D, H two place's gas ports can proportion of installation one control air valve realization compartment rate of descent be regulated arbitrarily.And rise, descend, in stop function
The valve rear portion is installed to be provided with in the chamber that falls control cylinder 17 slowly and is fallen control piston 18 slowly.Slowly fall to establish on the control cylinder left end cap 19 and fall inlet hole M slowly.As D, H, can install to come down to a lower group slowly when M three place's gas ports use simultaneously and close one control air valve, realize falling slowly, and rise, descend, in stop function.
Stop during dumping car lifting band carries to produce and impact and system's instantaneous pressure, when this moment, high pressure oil input channel P was not communicated with high pressure oil output channel C (Fig. 1), oil hydraulic cylinder relief valve 20 makes hydraulic jack and is protected with its connecting pipeline.When in like manner high pressure oil input channel P is not communicated with high pressure oil output channel C; (Fig. 2) produced and impacts or high pressure when oil hydraulic pump relief valve 21 commutated valve rod jam or the stuck changeover valve core of the unclean impurity of hydraulic oil when system's gas receiver air pressure descends; To oil hydraulic pump, hydrovalve and connecting pipeline thereof are effectively protected.When high pressure oil input channel P was communicated with high pressure oil output channel C, oil hydraulic cylinder relief valve 20 and oil hydraulic pump relief valve 21 were worked simultaneously, and each original paper of system is protected.When so the utility model can be effectively respectively to the various working condition of dumping car, each original paper of hydraulic system is comprised oil hydraulic pump, oil hydraulic cylinder, hydrovalve and connecting pipeline thereof are effectively protected.Have simple in structure, volume is little, in light weight, intensity is high, performance is safe and reliable characteristics.
Claims (4)
1. all system is protected the speed governing Pneumatic reversal valve; Comprise valve body, slipper seal spool, O RunddichtringO, circlip for shaft, front spring cover, reset spring, rear spring cover, piston, control cylinder, control cylinder lid, slow sending down abnormally ascending cylinder cap, relief valve sleeve, cylinder setting sleeve, relief valve spring, relief valve ball seat, steel ball, inclined-plane pressure head, slowly fall cylinder, piston, oil hydraulic cylinder relief valve, oil hydraulic pump relief valve fall slowly; It is characterized in that: be equipped with two on the valve body and overlap independently relief valve, protection oil hydraulic cylinder relief valve (20) and protection oil hydraulic pump relief valve (21); Valve body (1) inside is provided with high pressure oil input channel P, high pressure oil output channel C; The oil pressure inlet opening B of protection oil hydraulic pump relief valve (21) is communicated with the high pressure oil input channel P of valve body (1); The oil pressure inlet opening A of protection oil hydraulic cylinder relief valve (20) is communicated with the high pressure oil output channel C of valve body (1), the drainback passage F connected system fuel tank of oil hydraulic pump relief valve (21) and oil hydraulic cylinder relief valve (20).
2. all system protection speed governing Pneumatic reversal valve according to claim 1; It is characterized in that: the rising inlet hole D at control cylinder middle part and the decline inlet hole H on the cylinder right end cap (10), the piston between the two (18) are formed pneuamtic part, and are had ratio decline groove K at the slipper seal spool.
3. all system protection speed governing Pneumatic reversal valve according to claim 2 is characterized in that: rising inlet hole D is connected with manual proportional pneumatic control valve with decline suction port H.
4. all system protection speed governing Pneumatic reversal valve according to claim 1; It is characterized in that: fall control cylinder bottom slowly and fall inlet hole M slowly and be contained on the cylinder left end cap (19); The Pneumatic valve of function falls in connecting band constant speed slowly when selector valve is in the decline state of a control, starts to fall slowly to make the air inlet of M pore promote to fall slowly piston (18) to make slipper seal spool (2) be fixed on constant speed to fall slowly and realize on the position that function falls in constant speed slowly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205238215U CN202431635U (en) | 2011-12-15 | 2011-12-15 | Speed-regulating pneumatic control reversing valve for protecting whole system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205238215U CN202431635U (en) | 2011-12-15 | 2011-12-15 | Speed-regulating pneumatic control reversing valve for protecting whole system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431635U true CN202431635U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205238215U Expired - Fee Related CN202431635U (en) | 2011-12-15 | 2011-12-15 | Speed-regulating pneumatic control reversing valve for protecting whole system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431635U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161779A (en) * | 2011-12-15 | 2013-06-19 | 阜新北鑫星液压有限公司 | Full-system protective speed-regulating pneumatic operated reversing valve |
| CN105586847A (en) * | 2016-03-04 | 2016-05-18 | 武汉理工大学 | Device for automatically adjusting ground clearance of sucking disc of vacuum sweeper |
| CN108626192A (en) * | 2018-05-18 | 2018-10-09 | 宁波真格液压科技有限公司 | A kind of automatic control reversing valve |
| CN116104724A (en) * | 2022-12-28 | 2023-05-12 | 镇江长城注浆设备有限公司 | Cone valve type hydraulic grouting pump with hydraulic control reversing and large discharge capacity |
-
2011
- 2011-12-15 CN CN2011205238215U patent/CN202431635U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161779A (en) * | 2011-12-15 | 2013-06-19 | 阜新北鑫星液压有限公司 | Full-system protective speed-regulating pneumatic operated reversing valve |
| CN103161779B (en) * | 2011-12-15 | 2016-06-29 | 阜新北鑫星液压有限公司 | Total system protection speed-regulating pneumatic reversing valve |
| CN105586847A (en) * | 2016-03-04 | 2016-05-18 | 武汉理工大学 | Device for automatically adjusting ground clearance of sucking disc of vacuum sweeper |
| CN108626192A (en) * | 2018-05-18 | 2018-10-09 | 宁波真格液压科技有限公司 | A kind of automatic control reversing valve |
| CN116104724A (en) * | 2022-12-28 | 2023-05-12 | 镇江长城注浆设备有限公司 | Cone valve type hydraulic grouting pump with hydraulic control reversing and large discharge capacity |
| CN116104724B (en) * | 2022-12-28 | 2024-03-19 | 镇江长城注浆设备有限公司 | Cone valve type hydraulic grouting pump with hydraulic control reversing and large discharge capacity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20141215 |
|
| EXPY | Termination of patent right or utility model |