CN203959756U - The forklift gantry pipeline system of a kind of pair of governor valve - Google Patents
The forklift gantry pipeline system of a kind of pair of governor valve Download PDFInfo
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- CN203959756U CN203959756U CN201420372770.4U CN201420372770U CN203959756U CN 203959756 U CN203959756 U CN 203959756U CN 201420372770 U CN201420372770 U CN 201420372770U CN 203959756 U CN203959756 U CN 203959756U
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- valve
- governor
- shutoff valve
- tank
- shutoff
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Abstract
The utility model provides the forklift gantry pipeline system of a kind of pair of governor valve, comprises fuel tank and lift oil tank, and the rodless cavity bottom of described lift oil tank is provided with shutoff valve, and the rod chamber of lift oil tank is connected with described fuel tank; The other end of described shutoff valve is connected with governor valve by high pressure fuel pipe, and the other end of described governor valve is connected with multiway valve, and the oil inlet of described multiway valve is connected with described fuel tank; The drain tap of described shutoff valve is connected with fuel tank by hand change over valve.The utility model is directly provided with shutoff valve at the rodless cavity hydraulic fluid port of lift oil tank, and shutoff valve is connected by high pressure fuel pipe with governor valve, thereby in the time of can guaranteeing that door frame, while declining, the emergency situations such as booster occurs, door frame can stop declining, also can carry out slow decreasing by drain tap and the hand change over valve of shutoff valve, thereby guarantee the safety of goods.
Description
Technical field
The utility model relates to forklift gantry pipeline system, is specifically related to the forklift gantry pipeline system of a kind of pair of governor valve.
Background technology
The effect of forklift gantry pipeline system is the pressure energy of hydraulic oil in hydraulic efficiency pressure system to be converted into the kinetic energy of the piston rod (or plunger rod) of lift oil tank, and then the potential energy that is converted into goods is to reach the object of the goods that hoists.Existing door frame pipeline system is for the descending speed of limited piston bar (or plunger rod), general all in the bottom of lift oil tank, a governor valve is installed, the oil inlet of two lift oil tanks in door frame while declining (or oil outlet) first connects governor valve again and returns main system in interflow.Such design can not reach the object of control plunger bar descending speed well, when two lift oil tanks to the pipeline between governor valve leaks the situation of booster even, governor valve is because of inoperative, and goods shelf can freely decline rapidly, if there is weight on pallet fork, consequence is very dangerous.
Utility model content
The utility model, in order to solve the problems of the technologies described above, provides the forklift gantry pipeline system of a kind of pair of governor valve, has avoided the free fast-descending of goods shelf and the danger that causes.
The technical solution of the utility model is: the forklift gantry pipeline system of a kind of pair of governor valve, comprise fuel tank and lift oil tank, and the rodless cavity bottom of described lift oil tank is provided with shutoff valve, and the rod chamber of lift oil tank is connected with described fuel tank; The other end of described shutoff valve is connected with governor valve by high pressure fuel pipe, and the other end of described governor valve is connected with multiway valve, and the oil inlet of described multiway valve is connected with described fuel tank; The drain tap of described shutoff valve is connected with fuel tank by hand change over valve.
Further, the oil inlet of described shutoff valve is connected with governor valve, and the return opening of shutoff valve is communicated with the hydraulic fluid port of the rodless cavity of lift oil tank; Reversing valve core one end of described shutoff valve is connected with spool retainer spring.
Further, described governor valve comprises the oil inlet being connected with multiway valve and the return opening being connected with shutoff valve, described oil inlet is communicated with oil inlet, the pressure-gradient control valve core of check valve respectively by fixed restrictor, and the other end of the oil outlet of described check valve, pressure-gradient control valve core is all communicated with return opening.
The utility model is established shutoff valve in the rodless cavity bottom of each lift oil tank of fork truck, and the hydraulic fluid port of rodless cavity is directly communicated with the return opening of shutoff valve, and shutoff valve is connected with governor valve by high pressure fuel pipe.Wherein the oil circuit break-make of shutoff valve is by reversing valve core and spool retainer spring co-controlling oil circuit, the drain tap of shutoff valve is connected with hand change over valve, when hand change over valve is during in conducting state, the hydraulic oil in the rodless cavity of lift oil tank is through the direct oil sump tank of the drain tap of shutoff valve, hand change over valve.
When door frame hoists, the hydraulic oil in fuel tank enters in the rodless cavity of lift oil tank by multiway valve, governor valve and shutoff valve successively, and now governor valve does not play speed limit effect, and shutoff valve is because the balance of oil circuit control and retainer spring is in conducting state;
When door frame declines, hydraulic oil flows back to fuel tank by shutoff valve, governor valve, multiway valve successively by the rodless cavity of lift oil tank, and shutoff valve is because the balance of oil circuit control and retainer spring is in conducting state, and governor valve plays the effect of limited flow.
Speed when guaranteeing that door frame declines can not change, and the overcurrent flow that in two governor valves, governor valve is set is compared with the governor valve in single governor valve door frame pipeline system, only has half of its overcurrent flow.
When situations such as high pressure fuel pipe generation booster between governor valve and shutoff valve, inlet pressure moment of shutoff valve reduces to zero, and the recycle muzzle pressure being connected with lift oil tank still exists, the promotion that reversing valve core can pass through oil circuit control is in dissengaged positions, and door frame stops landing; Now only have control hand change over valve, make it in conducting state, hydraulic oil enters fuel tank by the drain tap of shutoff valve through hand change over valve, thereby door frame is fallen with lift oil tank, and the speed that door frame falls is controlled by the through-current capability of hand change over valve.
So the utlity model has following advantage:
1, the utility model is directly provided with shutoff valve at the rodless cavity hydraulic fluid port of lift oil tank, and shutoff valve is connected by high pressure fuel pipe with governor valve, thereby in the time of can guaranteeing that door frame, while declining, the emergency situations such as booster occurs, door frame can stop declining and the safety of assurance goods;
2, the utility model has increased emergency descent loop, guarantees when door frame cannot decline because of the working connection generation booster that hoists, and still can carry out slow decreasing by drain tap and the hand change over valve of shutoff valve;
3, the oil return flow of lift oil tank is mainly that pressure-gradient control valve core and fixed restrictor by governor valve limits, thereby guarantees that door frame steadily, decline lentamente.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model structural representation.
Fig. 2 is the structural representation of governor valve;
Fig. 3 is the structural representation of shutoff valve;
In figure: 1-multiway valve, 2-governor valve, 3-shutoff valve, 4-lift oil tank, 5-hand change over valve, 6-fuel tank, 7-check valve, 8-pressure-gradient control valve core, 9-fixed restrictor, 10-reversing valve core, 11-spool retainer spring.
The specific embodiment
As shown in Figure 1, the forklift gantry pipeline system of a kind of pair of governor valve, comprises that a shutoff valve 3 is respectively established in the rodless cavity bottom of fuel tank 6 and 4, two lift oil tanks 4 of two lift oil tanks, and the rod chamber of lift oil tank 4 is all connected with described fuel tank 6; The other end of shutoff valve 3 is respectively connected with governor valve 2 by high pressure fuel pipe, behind the other end interflow of described governor valve 2, is connected with multiway valve 1, and the oil inlet of described multiway valve 1 is connected with described fuel tank 6; Behind the drain tap interflow of two shutoff valves 3, by hand change over valve 5, be connected with fuel tank 6.
As shown in Figure 3, the oil inlet B of shutoff valve is connected with governor valve, and the return opening F of shutoff valve is communicated with the hydraulic fluid port of the rodless cavity of lift oil tank, behind the drain tap C interflow of shutoff valve, is connected with hand change over valve; Reversing valve core 10 one end of described shutoff valve are connected with spool retainer spring 11.
As shown in Figure 2, governor valve comprises the oil inlet being connected with multiway valve and the return opening being connected with shutoff valve, described oil inlet is communicated with oil inlet, the pressure-gradient control valve core 8 of check valve 7 respectively by fixed restrictor 9, and the other end of the oil outlet of described check valve 7, pressure-gradient control valve core 8 is all communicated with return opening.
This door frame pipeline system working process is as follows:
When 1, door frame hoists: the interior hydraulic oil of fuel tank 6 is flowed into respectively in two governor valves 2 by hydraulic fluid port P, the A of multiway valve 1, check valve 7 in governor valve 2 enters in shutoff valve 3, enter again in the rodless cavity of lift oil tank 4, thereby the piston rod that promotes lift oil tank 4 stretches out and door frame is hoisted, when door frame rises, to be raised to top be that lift oil tank stretches out while putting in place, and unnecessary hydraulic oil can pass through the direct oil sump tank of rod chamber hydraulic fluid port of lift oil tank 4;
Because the check valve 7 in governor valve 2 can guarantee hydraulic oil, unrestrictedly enter lift oil tank 4, shutoff valve 3 is guaranteed to keep conducting state because of input pressure, and the lifting velocity of door frame is directly decided by the flow of the oil outlet A of multiway valve 1.
When 2, door frame declines: the hydraulic oil in lift oil tank 4 rodless cavities passes through shutoff valve 3 and the governor valve 2 of cylinder bottom successively, because the check valve 7 in governor valve 2 is because oppositely closing, hydraulic oil can only be by the pressure-gradient control valve core 8 in governor valve 2 and fixed restrictor 9 throttlings by changeover valve 1 oil sump tank 6.Now the oil return flow of lift oil tank 4 is limited by pressure-gradient control valve core 8 and fixed restrictor 9, thereby guarantees that door frame steadily, decline lentamente, has guaranteed safety.
3, when situations such as high pressure fuel pipe generation booster between governor valve 2 and shutoff valve 3,3 inlet pressure moments of shutoff valve reduce to zero, and the oil scavenger pressure being connected with lift oil tank still exists, the promotion that reversing valve core 10 can pass through oil circuit control, in dissengaged positions, makes door frame cannot continue landing; By controlling hand change over valve 5, make it in conducting state, hydraulic oil enters fuel tank 6 by the drain tap C of shutoff valve 3 through hand change over valve 5, thereby door frame is fallen with lift oil tank 4, and the speed that door frame falls is controlled by the through-current capability of hand change over valve 5.
Above embodiment is not limited only to protection domain of the present utility model, all based on basic thought of the present utility model, modify or change all belong to protection domain of the present utility model.
Claims (3)
1. a forklift gantry pipeline system for two governor valves, comprises fuel tank and lift oil tank, it is characterized in that: the rodless cavity bottom of described lift oil tank is provided with shutoff valve, and the rod chamber of lift oil tank is connected with described fuel tank; The other end of described shutoff valve is connected with governor valve by high pressure fuel pipe, and the other end of described governor valve is connected with multiway valve, and the oil inlet of described multiway valve is connected with described fuel tank; The drain tap of described shutoff valve is connected with fuel tank by hand change over valve.
2. the forklift gantry pipeline system of a kind of pair of governor valve according to claim 1, is characterized in that: the oil inlet of described shutoff valve is connected with governor valve, and the return opening of shutoff valve is communicated with the hydraulic fluid port of the rodless cavity of lift oil tank; Reversing valve core one end of described shutoff valve is connected with spool retainer spring.
3. the forklift gantry pipeline system of a kind of pair of governor valve according to claim 1, it is characterized in that: described governor valve comprises the oil inlet being connected with multiway valve and the return opening being connected with shutoff valve, described oil inlet is communicated with oil inlet, the pressure-gradient control valve core of check valve respectively by fixed restrictor, and the other end of the oil outlet of described check valve, pressure-gradient control valve core is all communicated with return opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372770.4U CN203959756U (en) | 2014-07-08 | 2014-07-08 | The forklift gantry pipeline system of a kind of pair of governor valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372770.4U CN203959756U (en) | 2014-07-08 | 2014-07-08 | The forklift gantry pipeline system of a kind of pair of governor valve |
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| Publication Number | Publication Date |
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| CN203959756U true CN203959756U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420372770.4U Active CN203959756U (en) | 2014-07-08 | 2014-07-08 | The forklift gantry pipeline system of a kind of pair of governor valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108466983A (en) * | 2018-06-05 | 2018-08-31 | 安徽合力股份有限公司 | It is a kind of to decline the recyclable forklift hydraulic system of energy |
| US10604391B2 (en) * | 2017-03-23 | 2020-03-31 | The Raymond Corporation | Systems and methods for mast stabilization on a material handling vehicle |
-
2014
- 2014-07-08 CN CN201420372770.4U patent/CN203959756U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10604391B2 (en) * | 2017-03-23 | 2020-03-31 | The Raymond Corporation | Systems and methods for mast stabilization on a material handling vehicle |
| CN108466983A (en) * | 2018-06-05 | 2018-08-31 | 安徽合力股份有限公司 | It is a kind of to decline the recyclable forklift hydraulic system of energy |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |