CN201646610U - Automatic protection device of dump truck hydraulic pipeline - Google Patents
Automatic protection device of dump truck hydraulic pipeline Download PDFInfo
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- CN201646610U CN201646610U CN2010201920770U CN201020192077U CN201646610U CN 201646610 U CN201646610 U CN 201646610U CN 2010201920770 U CN2010201920770 U CN 2010201920770U CN 201020192077 U CN201020192077 U CN 201020192077U CN 201646610 U CN201646610 U CN 201646610U
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Abstract
Disclosed is an automatic protection device of a dump truck hydraulic pipeline. An explosion-proof valve (2) is arranged at an oil inlet and return pipe mouth (6) of an elevation cylinder (1) which is connected with a high-pressure oil pipe (3), and one end of the explosion-proof valve (2) is connected with the oil inlet and return pipe mouth (6) of the elevation cylinder (1) while the other end is connected with the high-pressure oil pipe (3). Hydraulic oil is delivered into the elevation cylinder (1) via the high-pressure oil pipe (3) through the explosion-proof valve (2) and keeps pressure. When in normal oil return, a chock (T) keeps normally opened as pressure difference generated by return hydraulic oil passes through the chock (T) of the explosion-proof valve (2) is lower than elasticity of a spring (5). When the high-pressure oil pipe (2) is exploded accidentally, pressure at an oil inlet end of the explosion-proof valve (2) is reduced instantly, return pressure of hydraulic oil under a pressure loss state is much higher than the elasticity of the spring (5), and a valve plate (10) is tightly pressed on a valve seat (9) to seal the chock (T) and close the explosion-proof valve (2) so that the elevation cylinder (1) is in an elevation state stably. The automatic protection device effectively provides a safety guarantee, prevents heavy goods boxes rapidly dropping due to rapid reduction of pressure, and avoiding damaging the dump truck and hurting personnel.
Description
Technical field
The utility model relates to the dumping car hydraulic efficiency pressure system, relates in particular to the hydraulic efficiency pressure system protective device.
Background technology
Domestic dumping car industry development is very fast, and various dumping cars are all supporting with hydraulic efficiency pressure system, because the load of dumping car when unloading heavy duty hydraulic efficiency pressure system is very heavy, except the dumping car structural development, it is especially important that the safety of hydraulic efficiency pressure system just seems.The lifting safety measure of existing dumping car adopts the mechanical support form mostly, and this form only plays the safety control effect when zero load is keeped in repair.When dumping truck is unloaded in heavy duty, if hydraulic oil pipe blow-out or suffer external impact during heavily loaded lifting, when perhaps oil connector connects the unexpected loosening and unexpected off-load of insecure appearances, can cause the rapid oil return of oil cylinder decompression, heavily loaded container is fallen after rise rapidly, produce enormous impact, often dumping car chassis, subframe are caused damage, driver and crew are caused damage.
Summary of the invention
The purpose of this utility model, hydraulic efficiency pressure system for dumping car provides a kind of safety convenience instrument exactly, prevents to cause accident to take place because of hydraulic oil pipe explosion or off-load suddenly, strengthens the safety of hydraulic efficiency pressure system, guarantee the dumping car normal operation, improve vehicle degree of utilization and delivery work efficiency.
Task of the present utility model is finished like this: design a kind of dumping car hydraulic tubing automatic protection device, elevating ram and high pressure fuel pipe bonded assembly oil inlet and oil return mouth of pipe place are provided with explosion relief valve, explosion relief valve one end connects the oil inlet and oil return mouth of pipe of elevating ram, and the other end is connected with high pressure fuel pipe.Suit valve body in the valve shell cavity of explosion relief valve, valve body center installing spool, outer pocketed springs of spool and valve pocket, seal the internal orifice of valve body by valve seat, spool passes the core bar part suit valve block and the setting nut of valve seat internal orifice, have restriction on valve seat and the valve block, be communicated with the inner chamber of valve body and valve casing.Valve casing is a cylinder shell, and an end neck connects thin screwed pipe, can connect with the mouth of pipe of high pressure fuel pipe, is with negative thread in the inner chamber of valve casing, equipped valve body, and the big end mouth of pipe of valve casing is connected with the oil inlet and oil return mouth of pipe of elevating ram is equipped.The existing hydraulic gear of protective device and dumping car is formed whole hydraulic efficiency pressure system.When the hydraulic efficiency pressure system normal operation, explosion relief valve free flow during the elevating ram lifting.When the hydraulic control back pressure is disappeared, the pressure of the hydraulic oil quantity of reflux generation that increases suddenly is enough to overcome the spring force of valve core spring, valve block is pressed onto on the valve seat, sealing is communicated with the restriction of valve body and valve shell cavity, thereby make the explosion relief valve SELF CL, play prevention hydraulic oil backflow effect, make elevating ram keep stable lifting state, prevent to ensure the safety of dumping car and operating personal because of the anxious suddenly contingency that falls to causing of container appears in the oil circuit decompression.
Manufacture experimently, test according to above-mentioned design plan, prove of the present utility model reasonable in design, simple and reliable for structure, connect easy to loading and unloadingly, quick, strengthened the safety of hydraulic efficiency pressure system, can prevent the contingency that causes because of hydraulic pipe explosion or rapid decompression effectively, guarantee dumping car hydraulic efficiency pressure system normal operation, improve vehicle degree of utilization and work efficiency, reduce the loss of stopping, reached predetermined purpose preferably.
Description of drawings
Fig. 1 is explosion relief valve of the present utility model (2) and elevating ram (1) coupled condition structural representation;
Fig. 2 is a F local structure scheme drawing among Fig. 1;
Fig. 3 is that explosion relief valve of the present utility model (2) structure is partly cutd open scheme drawing;
Fig. 4 adopts dumping car hydraulic schematic diagram of the present utility model.
Among the figure, 1-elevating ram, 2-explosion relief valve, 3-high pressure fuel pipe, 4-valve body, 5-spring, the 6-oil inlet and oil return mouth of pipe, the 7-valve pocket, 8-spool, 9-valve seat, 10-valve block, 11-lifting valve, 12-limit valve, the 13-Pneumatic valve, 14-oil return pipe, 15-check valve, 16-fil, 17-hydraulic reservoir, 18-oil pump; F-partial view symbol, J-adaptor union, M-setting nut, K-valve casing, L-screwed pipe, T-restriction, N-inner chamber, X-power takeoff, Q-gas circuit.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Consult Fig. 1, Fig. 2, installing explosion relief valve 2 connects high pressure fuel pipe 3 on the oil inlet and oil return mouth of pipe 6 of elevating ram 1.High pressure fuel pipe 3 is installed valve body 4, sleeve springs 5 in the valve body 4, outer loading nut M by the outer end screwed pipe L that adaptor union J connects explosion relief valve 2 in the valve casing K of explosion relief valve 2.
Consult Fig. 3, the valve casing K of explosion relief valve 2 is a tubular shell, one end neck connects screwed pipe L, can have negative thread by equipped the connection among high pressure fuel pipe 3, the one end opening inner chamber N of adaptor union J, equipped with valve body 4, valve body 4 centers installing spool 8, spool 8 runs through valve seat 9, the core bar pocketed springs 5 of spool 8 in valve body 4, core bar suit valve block 10 outside valve seat 10, setting nut M, the inner chamber N opening part of valve casing K can interiorly overlap 6 equipped connections of the oil inlet and oil return mouth of pipe of elevating ram 1.
Consult Fig. 4, the oil circuit of dumping car hydraulic efficiency pressure system, oil pump 18 is squeezed into lifting valve 11 with hydraulic oil from hydraulic reservoir 17, lead to elevating ram 1 through high pressure fuel pipe 3, is provided with explosion relief valve 2 at the connecting portion of high pressure fuel pipe 3 and elevating ram 1.Pneumatic valve 13 connects limit valve 12, lifting valve 11, power takeoff X, oil pump 18 by gas circuit Q, lifting valve 11 connects both also oil returns of oil-feed of high pressure fuel pipe 3 of elevating ram 1, oil pump 18 is by power takeoff X starting pressurization, hydraulic reservoir 17 passes through the oil circuit of oil pump 18 connection lifting valves 11 as oil inlet, and lifting valve 11 is communicated with hydraulic reservoirs 17 by oil return pipe 14 through fils 16.
The utility model in actual applications, explosion relief valve 2 is normally open valve in normal operation, hydraulic oil is carried in elevating ram 1 by explosion relief valve 2 through high pressure fuel pipe 3, keeps the lifting state pressure of elevating ram 1 to stablize.If the piston rod of elevating ram 1 is descended, normal oil return state is: hydraulic oil flows to high pressure fuel pipe 3 through explosion relief valve 2 from elevating ram 1, pass through lifting valve 11 and oil return pipe 14 hydraulic return fuel tanks 17 again.Because the pressure reduction that backflow hydraulic oil process explosion relief valve 2 restriction T are produced is less than the elastic force of spring 5, so restriction T still keeps often opening.And when high pressure fuel pipe 3 generation explosions, the oil inlet end pressure moment decline of restriction T in the explosion relief valve 2, hydraulic oil flows out the oil inlet and oil return mouth of pipe 6 rapidly under the decompression state from elevating ram 1, rushes at explosion relief valve 2 and high pressure fuel pipe 3.The pressure that this moment, the hydraulic oil backflow produced is pressed on valve block 10 on the valve seat 9 much larger than the spring force of spring 5, and sealing restriction T makes explosion relief valve 2 close oil return line, keeps the equalization of pressure in the elevating ram 1, is stabilized in the lifting state.The piston rod that can prevent elevating ram 1 so suddenly falls heavily loaded container because of decompression descends suddenly, avoids causing dumping car to damage and the operating personal damage, thereby plays the safety precaution effect effectively.
Claims (3)
1. dumping car hydraulic tubing automatic protection device, it is characterized in that elevating ram (1) and high pressure fuel pipe (3) the bonded assembly oil inlet and oil return mouth of pipe (6) locate to be provided with explosion relief valve (2), explosion relief valve (2) one ends connect the oil inlet and oil return mouth of pipe (6) of elevating ram (1), and the other end is connected with high pressure fuel pipe (3).
2. according to the described dumping car hydraulic tubing of claim 1 automatic protection device, the middle suit valve body (4) of valve casing (K) inner chamber (N) that it is characterized in that said explosion relief valve (2), valve body (4) center installing spool (8), outer pocketed springs of spool (8) (5) and valve pocket (7), seal the internal orifice of valve body (4) by valve seat (9), spool (8) passes the core bar part suit valve block (10) and the setting nut (M) of valve seat (9) internal orifice, have restriction (T) on valve seat (9) and the valve block (10), be communicated with the inner chamber of valve body (4) and valve casing (K).
3. according to the described dumping car hydraulic tubing of claim 2 automatic protection device, it is characterized in that said valve casing (K) is a cylinder shell, one end neck connects thin screwed pipe (L), can connect with the mouth of pipe of high pressure fuel pipe (3), band negative thread in the inner chamber (N) of valve casing (K), equipped valve body (4), the big end mouth of pipe of valve casing (K) is connected with the oil inlet and oil return mouth of pipe (6) of elevating ram (1) is equipped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201920770U CN201646610U (en) | 2010-05-06 | 2010-05-06 | Automatic protection device of dump truck hydraulic pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201920770U CN201646610U (en) | 2010-05-06 | 2010-05-06 | Automatic protection device of dump truck hydraulic pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201646610U true CN201646610U (en) | 2010-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201920770U Expired - Fee Related CN201646610U (en) | 2010-05-06 | 2010-05-06 | Automatic protection device of dump truck hydraulic pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201646610U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016455A (en) * | 2012-12-24 | 2013-04-03 | 贵州枫阳液压有限责任公司 | Anti-explosion valve |
| CN104006195A (en) * | 2013-05-23 | 2014-08-27 | 芜湖高昌液压机电技术有限公司 | Oil pipe explosion-proof valve (explosion-proof valve) for lifter |
| CN104121250A (en) * | 2013-12-07 | 2014-10-29 | 东风柳州汽车有限公司 | Single-action telescopic multi-stage oil cylinder |
| CN104943627A (en) * | 2014-03-31 | 2015-09-30 | 湖北佳恒科技有限公司 | Intelligent safety energy-saving hydraulic control system for dumper |
| CN106402087A (en) * | 2016-10-08 | 2017-02-15 | 苏州威尔特铝合金升降机械有限公司 | Explosion protection system for mast-type hydraulic cylinder |
| CN107953818A (en) * | 2016-10-17 | 2018-04-24 | 江苏华祥机械制造有限公司 | A kind of dumper fluid pressure linkage protective device |
-
2010
- 2010-05-06 CN CN2010201920770U patent/CN201646610U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016455A (en) * | 2012-12-24 | 2013-04-03 | 贵州枫阳液压有限责任公司 | Anti-explosion valve |
| CN104006195A (en) * | 2013-05-23 | 2014-08-27 | 芜湖高昌液压机电技术有限公司 | Oil pipe explosion-proof valve (explosion-proof valve) for lifter |
| CN104121250A (en) * | 2013-12-07 | 2014-10-29 | 东风柳州汽车有限公司 | Single-action telescopic multi-stage oil cylinder |
| CN104943627A (en) * | 2014-03-31 | 2015-09-30 | 湖北佳恒科技有限公司 | Intelligent safety energy-saving hydraulic control system for dumper |
| CN106402087A (en) * | 2016-10-08 | 2017-02-15 | 苏州威尔特铝合金升降机械有限公司 | Explosion protection system for mast-type hydraulic cylinder |
| CN107953818A (en) * | 2016-10-17 | 2018-04-24 | 江苏华祥机械制造有限公司 | A kind of dumper fluid pressure linkage protective device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20160506 |