CN203670328U - Air control reversing valve for packing box lifting hydraulic system of heavy dump truck - Google Patents
Air control reversing valve for packing box lifting hydraulic system of heavy dump truck Download PDFInfo
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- CN203670328U CN203670328U CN201320861965.0U CN201320861965U CN203670328U CN 203670328 U CN203670328 U CN 203670328U CN 201320861965 U CN201320861965 U CN 201320861965U CN 203670328 U CN203670328 U CN 203670328U
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Abstract
The utility model relates to a reversing valve, in particular to an air control reversing valve for a packing box lifting hydraulic system of a heavy dump truck. The air control reversing valve mainly solves the technical problem that an air control reversing valve in the prior art only has a descending position and an ascending position, buffering cannot be conducted, O-shaped rings used at the two ends of a valve body are short in service life and leak oil, and oil leakage causes waste of hydraulic oil and causes pollution to the environment. The air control reversing valve comprises a valve body, cylinder tubes are respectively connected to the two ends of the valve body, cylinder covers are arranged at the outer ends of the cylinder tubes, pistons are arranged in the cylinder tubes, an ascending air inlet and a descending air outlet are respectively formed in the two ends of the pistons inside the cylinder tubes, the pistons are connected with pull rods and reset springs, valve rods are connected to the inner ends of the valve rods, the valve rods are arranged in holes of the valve body, oil return cavities are formed in the holes of the valve body, an oil input connector and an oil output connector are respectively connected to the valve body and are respectively communicated with an oil input cavity and an oil output cavity, and the oil input cavity is connected with a safety valve.
Description
Technical field
The utility model relates to a kind of selector valve, especially relates to a kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve.
Background technique
Heavy-duty tipper is owing to restricted by special usage requirement and Environmental Conditions, there are the many features different from common dumping car: useful load is large, the speed of a motor vehicle is low, haul distance is short, it is larger that its axle load can not selected by highway code restriction, and have good passing ability and mobility etc. under severe road conditions.Therefore, need specialized designs chassis, upper dress adopts sinciput artificial lifting way, and simple in structure, on platform floor and main car frame, the shut height of plane can be very little, and whole vehicle stability is good.There are following two shortcomings in Pneumatic reversal valve for heavy-duty tipper container hydraulic lifting mechanism in the market: one, generally only have the position of decline and upper raise-position, the definite value speed that container starts to set up in rising limit position declines, if rate of descent is very fast, inertia is large, and shake is large, around in the poor situation of pavement behavior, easily cause overturn accident, if rate of descent is slow, time waste is large, affects conveying efficiency; Two, Pneumatic reversal valve in use, is high pressure liquid force feed by near the hydraulic oil of oil groove valve body two ends, and valve body two ends are by seal with O ring easy oil leakage, and O shape circle is short working life, and leakage of oil causes the waste of hydraulic oil, also pollutes to environment.
Model utility content
The utility model is to provide a kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve, and it is mainly to solve the existing Pneumatic reversal valve of prior art to only have the position of decline and upper raise-position, cannot cushion; And the O shape circle life-span that valve body two ends are used is short, leakage of oil, and leakage of oil causes the waste of hydraulic oil, the technical problem of also polluting etc. to environment.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
A kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve of the present utility model, comprise valve body, described valve body two ends are connected with respectively cylinder barrel, bonnet, cylinder barrel outer end is provided with cylinder head, in cylinder barrel, be provided with piston, cylinder barrel inside offers respectively rising suction port at piston two ends, decline suction port, piston is connected with pull bar, Returnning spring, Returnning spring is located on spring seat, piston cross-under has guide holder, the Returnning spring the other end is located on guide holder, pull bar the inner is connected with valve rod, valve rod is located in valve body hole, in valve body hole, be provided with oil back chamber, on valve body, be connected with respectively fuel inlet fitting, delivery connection, fuel inlet fitting, delivery connection is communicated with respectively oil suction chamber, go out oil pocket.Capacity of the tipping body hydraulic lifting mechanism is mainly made up of fuel tank, gear pump, Pneumatic reversal valve, hand control valve, multi-stage oil cylinder, limited valve and pipeline.Gear pump is power source, and gear pump outlet has oil outlet one-way valve; Hand control valve, Pneumatic reversal valve and limited valve are control units; Multi-stage oil cylinder is the power unit of system.
When hand control valve handle is during at neutral position, the fuel-displaced of gear pump takes back fuel tank by Pneumatic reversal valve internal direct;
When unloading, hand control valve handle is shifted raise-position onto, the ventilation of Pneumatic reversal valve rising suction port, and piston is pushing away pull bar, pull bar is pushing away valve rod and is moving right to qualifying bit, hydraulic oil enters Multi-stage cylinder, and Multi-stage cylinder stretches out, and container rises, when container rises to set angle, limited valve is opened, and the air inlet of Pneumatic reversal valve rising suction port is cut off, and gas is logical extraneous; Piston is moved to the left under the effect of Returnning spring, and band ovable valve stem is got back to neutral position, and gear pump is fuel-displaced by the inner oil sump tank of selector valve.In the time of unloading, if when the overweight or huge external force of container is applied to container, hydraulic fluid pressure exceedes the setting pressure of Pneumatic reversal valve safety valve, safety valve overflow, the hydraulic oil oil sump tank of overflow, protects whole hydraulic system.
When decline, Pneumatic reversal valve only has the ventilation of decline suction port, and piston hauls pull bar, pull bar hauls valve rod and is moved to the left to qualifying bit, and the opening that leads to oil back chamber between valve rod and valve body is opened, and Multi-stage cylinder is under container Gravitative Loads, hydraulic oil is by the inner oil sump tank of Pneumatic reversal valve, and container declines.
Pneumatic reversal valve of the present utility model: the one, solve the definite value speed decline that heavy-duty tipper container starts to set up from rising limit position, if rate of descent is very fast, inertia is large, shake is large, around in the poor situation of pavement behavior, easily cause overturn accident, if rate of descent is slow, affect conveying efficiency; The 2nd, while solving the work of valve body two ends, oil groove is by high pressure oil, by the technical problem of seal with O ring easy oil leakage.
As preferably, in described cylinder barrel, be provided with the slow piston that falls, slowly fall piston and be located at piston outer end, the slow area that falls piston is greater than the area of piston, and cylinder head end has the slow suction port that falls.
As preferably, described Pneumatic reversal valve is set up the slow function of falling.
When slow falling, slow fall switch knob and open, hand control valve handle is shifted the position that declines onto, and Pneumatic reversal valve decline suction port is gentle falls suction port air inlet simultaneously, because the slow piston area of falling is larger than piston area, thrust is large, and piston hauls pull bar, and pull bar hauls valve rod and is moved to the left to the slow piston restriction position that falls, valve rod opening throttling towards oil back chamber on valve body is opened, Multi-stage cylinder is under container Gravitative Loads, and hydraulic oil is by the inner throttling return oil case of Pneumatic reversal valve, container slow decreasing; On earth, limited valve is opened, and the gentle air pressure that falls suction port of decline suction port is truncated simultaneously, and piston moves right under the effect of Returnning spring, and band ovable valve stem is got back to neutral position, and container is locked by locking device, has greatly improved the Security using.
In the time of client's practical operation dumping car, after having unloaded, first drop to certain altitude, then slow decreasing on earth, on earth after, container is locked by locking device.
As preferably, near described Pneumatic reversal valve valve body two ends, oil groove is to be all communicated with fuel tank, in working procedure, is all low-pressure hydraulic oil by the hydraulic oil of two ends oil groove, and valve body two ends are by seal with O ring, and sealing is reliable, and the life-span is long.
As preferably, described valve body is connected with safety valve.
As preferably, described piston cross-under has guide holder, and Returnning spring one end is located on guide holder.
Therefore, the utility model is by setting up the slow function of falling, the Security while greatly improving unloading; By improving the Median Function of Pneumatic reversal valve inside, making by the hydraulic oil at valve body two ends is low-pressure hydraulic oil, improves two ends seal with O ring reliability.The applicable scope of product after improvement is wider, simple and reasonable for structure.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 is side structure schematic diagram of Fig. 1;
Accompanying drawing 3 is A-A cross-sectional view of Fig. 2.
Component, position and numbering in figure: valve body 1, cylinder barrel 2, bonnet 3, cylinder head 4, piston 5 rising suction ports 6, decline suction port 7, pull bar 8, Returnning spring 9, spring seat 10, valve rod 11, oil back chamber 12, fuel inlet fitting 13, delivery connection 14, slow piston 15, slow suction port 16, safety valve 17, guide holder 18, O-ring seals 19, the O-ring seals 20 of falling of falling.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve of this example, Fig. 3 as shown in Figure 1, Figure 2,, comprise valve body 1, valve body two ends are connected with respectively cylinder barrel 2, bonnet 3, cylinder barrel outer end is provided with cylinder head 4, in cylinder barrel, be provided with piston 5, cylinder barrel inside offers respectively rising suction port 6, decline suction port 7 at piston two ends.In cylinder barrel, be also provided with the slow piston 15 that falls, slowly fall piston and be located at piston outer end, the slow area that falls piston is greater than the area of piston, and cylinder head end has the slow suction port 16 that falls.The two ends of valve body are provided with O-ring seals 19, O-ring seals 20.Piston is connected with pull bar 8, Returnning spring 9, and Returnning spring is located on spring seat 10, and piston cross-under has guide holder 18, and Returnning spring 9 the other ends are located on guide holder 18.Pull bar the inner is connected with valve rod 11, and valve rod is located in the valve opening of valve body, and valve opening is provided with oil back chamber 12, is connected with respectively fuel inlet fitting 13, delivery connection 14 on valve body, and fuel inlet fitting is communicated with respectively oil suction chamber and goes out oil pocket with delivery connection.Valve body is connected with safety valve 17.
When hand control valve handle is during at neutral position, the fuel-displaced of gear pump takes back fuel tank by Pneumatic reversal valve internal direct;
When unloading, hand control valve handle is shifted raise-position onto, the ventilation of Pneumatic reversal valve rising suction port, and piston 5 is pushing away pull bar 8, pull bar 8 is pushing away valve rod 11 and is moving right to qualifying bit, hydraulic oil enters Multi-stage cylinder, and Multi-stage cylinder stretches out, and container rises, when container rises to set angle, limited valve is opened, and the air inlet of Pneumatic reversal valve rising suction port is cut off, and gas is logical extraneous; Piston 5 is moved to the left under the effect of Returnning spring 9, and band ovable valve stem 11 is got back to neutral position, and gear pump is fuel-displaced by the inner oil sump tank of selector valve.In the time of unloading, if when the overweight or huge external force of container is applied to container, hydraulic fluid pressure exceedes the setting pressure of Pneumatic reversal valve safety valve, safety valve overflow, the direct oil sump tank of hydraulic oil of overflow, protects whole hydraulic system.
When decline, Pneumatic reversal valve only has the ventilation of decline suction port, piston 5 hauls pull bar 8, pull bar 8 hauls valve rod 11 and is moved to the left to qualifying bit, the opening that leads to oil back chamber between valve rod 11 and valve body 1 is opened, Multi-stage cylinder is under container Gravitative Loads, and hydraulic oil is by the inner oil sump tank of Pneumatic reversal valve, and container declines.
When slow falling, slow fall switch knob and open, hand control valve handle is shifted the position that declines onto, Pneumatic reversal valve decline suction port eases up and falls suction port air inlet simultaneously, slow fall piston 15 and move right to the qualifying bit in cylinder barrel 2, because slow piston 15 Area Ratio piston 5 areas that fall are large, thrust is large, so piston 5 hauls pull bar 8, pull bar 8 hauls valve rod 11 can only move to the slow restriction position that falls piston 15 left, valve rod 11 opening throttling towards oil back chamber on valve body 1 is opened, Multi-stage cylinder is under container Gravitative Loads, hydraulic oil is by the inner throttling return oil case of Pneumatic reversal valve, container slow decreasing, on earth, limited valve is opened, and the gentle air pressure that falls suction port of decline suction port is truncated simultaneously, and piston 5 moves right under the effect of Returnning spring 9, promotes valve rod 11 and gets back to neutral position, and container is locked by locking device.
The Pneumatic reversal valve performance parameter that this is routine: rated flow: 100L/min, rated pressure 20MPa, gas control pressure (0.4-0.6) MPa.
The foregoing is only specific embodiment of the utility model, but structure characteristic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all encompassed among the scope of the claims of the present utility model.
Claims (4)
1. a heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve, comprise valve body (1), it is characterized in that described valve body (1) two ends are connected with respectively cylinder barrel (2), bonnet (3), cylinder barrel outer end is provided with cylinder head (4), in cylinder barrel, be provided with piston (5), the inherent piston of cylinder barrel two ends have rising suction port (6), decline suction port (7), piston is connected with pull bar (8), Returnning spring (9), Returnning spring is located on spring seat (10), pull bar the inner is connected with valve rod (11), valve rod is located in the hole of valve body, valve opening is provided with oil back chamber (12), on valve body, be connected with respectively fuel inlet fitting (13), delivery connection (14), fuel inlet fitting is communicated with respectively oil suction chamber and goes out oil pocket with delivery connection.
2. a kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve according to claim 1, in cylinder barrel (2) described in it is characterized in that, be provided with the slow piston (15) that falls, slow fall piston and be located at piston (5) outer end, the slow area that falls piston is greater than the area of piston, cylinder head (4) end has to delay and falls suction port (16), and the two ends of valve body are respectively equipped with O-ring seals (19), O-ring seals (20).
3. a kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve according to claim 1 and 2, is characterized in that the oil suction chamber of described valve body (1) is connected with safety valve (17).
4. according to a kind of heavy duty dump truck packing case lifting hydraulic system Pneumatic reversal valve described in claim 1 or 2 or 3, it is characterized in that described piston (5) cross-under has guide holder (18), Returnning spring (9) one end is located on guide holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861965.0U CN203670328U (en) | 2013-12-25 | 2013-12-25 | Air control reversing valve for packing box lifting hydraulic system of heavy dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861965.0U CN203670328U (en) | 2013-12-25 | 2013-12-25 | Air control reversing valve for packing box lifting hydraulic system of heavy dump truck |
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| Publication Number | Publication Date |
|---|---|
| CN203670328U true CN203670328U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320861965.0U Expired - Fee Related CN203670328U (en) | 2013-12-25 | 2013-12-25 | Air control reversing valve for packing box lifting hydraulic system of heavy dump truck |
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| CN (1) | CN203670328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505817A (en) * | 2019-01-04 | 2019-03-22 | 潍坊山特液压机械有限公司 | A kind of pneumatic control hydraulic reversing valve |
-
2013
- 2013-12-25 CN CN201320861965.0U patent/CN203670328U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505817A (en) * | 2019-01-04 | 2019-03-22 | 潍坊山特液压机械有限公司 | A kind of pneumatic control hydraulic reversing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180911 Address after: 311217 4387 Road four, Xinjie, Xiaoshan District, Hangzhou, Zhejiang Patentee after: ZHEJIANG AFANTE PREC EQUIPMENT MFG Co.,Ltd. Address before: 311217 Zhongsheng village, four road extension section, Xinjie Town, Xiaoshan District, Hangzhou, Zhejiang Patentee before: XINKUI HYDRAULIC ENGINEERING CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20211225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |