CN201137729Y - Multilevel amortization total distance guiding check-valve damping oil cylinder - Google Patents
Multilevel amortization total distance guiding check-valve damping oil cylinder Download PDFInfo
- Publication number
- CN201137729Y CN201137729Y CNU2007201852875U CN200720185287U CN201137729Y CN 201137729 Y CN201137729 Y CN 201137729Y CN U2007201852875 U CNU2007201852875 U CN U2007201852875U CN 200720185287 U CN200720185287 U CN 200720185287U CN 201137729 Y CN201137729 Y CN 201137729Y
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- cylinder
- oil
- cylinder barrel
- damping
- back segment
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Abstract
The utility model relates to a multilevel buffer full stroke guiding check valve damping oil cylinder, a damping piston which is matched with a cylinder in a gap matching relation is arranged in the cylinder, axial oil return grooves are evenly distributed along the circumference direction on the inner wall of the front section of the cylinder, parts of the oil return grooves are differently extended into the inner wall of the rear section of the cylinder from front to back along the axial length in the axial oil return grooves, and a middle side oil outlet which is connected with an oil return pipe through a throttle valve is arranged in the middle of the rear section of the cylinder. The inner diameters of the front section and the rear section of the cylinder of the oil cylinder are same, the axial oil return grooves whose parts are extended into the inner wall of the rear section of the cylinder are evenly distributed on the inner wall of the front section of the cylinder, a guiding device is arranged between the oil return grooves, which prevents the damping piston from striking the front edge of the rear section of the cylinder, the side oil outlet is arranged in the middle of the rear section of the cylinder, which enables the damping piston to gradually reduce the oil return quantity and the oil discharge quantity level by level when the damping piston moves in the rear section of the cylinder, and the moving speed of the damping piston is gradually reduced level by level, which enables the movement of the damping piston to be well accord with the working condition demands for closing the check valve.
Description
Technical field
The utility model relates to a kind of safety check damping oil cylinder, the oil-return groove in particularly a kind of safety check damping oil cylinder cylinder body and the one-way throttle valve of return tube.
Background technique
Safety check is called check valve or one-way valve again.The power of the mobile generation of flowing medium itself opens and closes automatically in the safety check tube road, safety check is in pipe-line system, only allow liquid medium to flow to a direction, stop flowing medium to flow backwards, flowing medium flows backwards and can cause the leakage of pump and drive motor counter-rotating and container inner fluid medium.The closing property of safety check influences the hydrodynamic parameters in the pipeline.Safety check is when cutting out, the fitness for purpose safety check is swift in response, i.e. quick closedown when flowing backwards appears in flowing medium, by the flowing medium that flows backwards, if but close too fastly, and the flow velocity of flowing medium reduces to zero rapidly from the refluence speed of maximum in the pipeline, and the kinetic energy of flowing medium changes into static energy rapidly, make that the pressure of flowing medium raises rapidly in the pipeline, generation may have the water hammer of destruction to pipe-line system.In order to prevent that safety check generation when ending the flowing medium that flows backwards has destructive water hammer, in the prior art, can be connected with the safety check damping oil cylinder on the valve shaft of safety check.The safety check damping oil cylinder has continuous cylinder barrel, return tube and oil storage cylinder, oil storage cylinder has oil inlet and outlet and pneumostome, the pneumostome of oil storage cylinder is connected with air-strainer, the front end of return tube links to each other with the oil inlet and outlet of oil storage cylinder, before the cylinder barrel, before back two ends have respectively, back cylinder cover, the inner chamber of cylinder barrel has internal diameter big, little different before, the two sections cylinder barrels in back, the damping plug that matches with clearance fit relationship with the back segment cylinder barrel is arranged in the cylinder barrel, the one-way valve that in the past flows to is backward arranged on the damping plug, the rear end of the front end of cylinder barrel and leading portion cylinder barrel have respectively link to each other with return tube before, middle side direction oil inlet and outlet, there is the rear side that links to each other with return tube by throttle valve the rear end of cylinder barrel to oil outlet, damping plug is connected with the damping stopper rod, damping stopper rod cylinder cap in the past stretches out, and there is radially hinging shaft in the outside of front end housing.During use, the damping stopper rod of safety check damping oil cylinder is hinged on the valve shaft fork of safety check, the radially hinging shaft in the front end housing outside is hinged on the hinged axle bed of valve body, when safety check cuts out because of flowing medium flows backwards, the valve shaft of safety check promotes damping plug by fork and moves to the less back segment cylinder barrel of internal diameter from the bigger leading portion cylinder barrel of internal diameter in cylinder barrel, when damping plug moves in the leading portion cylinder barrel, can the oil of damping plug front by the backflow gap between damping plug and the leading portion cylinder barrel and before, middle side direction oil inlet and outlet enters return tube and enters oil storage cylinder, allow safety check close major part apace, after damping plug enters the back segment cylinder barrel, there is not backflow gap between damping plug and the back segment cylinder barrel, the oil of damping plug front can only enter return tube and enter oil storage cylinder to oil outlet and one-way throttle valve by rear side, regulate the aperture of one-way throttle valve, the can regulate damping plug allows safety check close with less speed at back segment in the movement velocity of back segment cylinder barrel.This safety check damped cylinder has following deficiency:
1. safety check is when cutting out, in order to prevent to produce water hammer, preferably in leading portion quick closedown major part, throttle down then gradually slows down, safety check damping oil cylinder in the prior art has the large and small different forward and backward two sections cylinder barrels of internal diameter, damping plug is to match with clearance fit relationship with the back segment cylinder barrel, damping plug is respectively with two constant speed motions in forward and backward two sections cylinder barrels, particularly at back segment, damping plug is with approximate constant lower speed motion, not retarded motion, can not meet the operating mode needs of closure of check ring well;
2. damping plug enters the motion of the less cylinder barrel of back segment internal diameter from the bigger cylinder barrel of leading portion internal diameter, and damping plug is not to slow down gradually, but speed diminishes suddenly, causes system vibration, can not meet the operating mode needs of closure of check ring well;
3. do not have the guiding device of damping plug motion in the cylinder barrel, damping plug enters the motion of the less cylinder barrel of back segment internal diameter from the bigger cylinder barrel of leading portion internal diameter, and damping plug clashes into the edge, front of back segment cylinder barrel easily.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned deficiency, proposes to have in a kind of cylinder barrel the guiding device of damping plug motion, a kind of multi-buffer total travel that can meet operating mode needs of the closure of check ring well safety check damping oil cylinder that leads.
The utility model is realized with the following method.
Multi-buffer total travel guiding safety check damping oil cylinder has continuous cylinder barrel, return tube and oil storage cylinder, oil storage cylinder has oil inlet and outlet and pneumostome, the pneumostome of oil storage cylinder is connected with air-strainer, the front end of return tube links to each other with the oil inlet and outlet of oil storage cylinder, before the cylinder barrel, before back two ends have respectively, back cylinder cover, the damping plug that matches with clearance fit relationship with cylinder barrel is arranged in the cylinder barrel, the one-way valve that in the past flows to is backward arranged on the damping plug, the front end of cylinder barrel with middle have respectively link to each other with return tube before, middle side direction oil inlet and outlet, there is the rear side that links to each other with return tube by throttle valve the rear end of cylinder barrel to oil outlet, damping plug is connected with the damping stopper rod, damping stopper rod cylinder cap in the past stretches out, there is radially hinging shaft in the outside of front end housing, cylinder barrel has leading portion cylinder barrel and back segment cylinder barrel vertically, the leading portion inner wall of cylinder, along circumferentially being evenly equipped with axial oil-return groove, axially in the oil-return groove, have the part oil-return groove differently to stretch into the leading portion inwall of back segment cylinder barrel along the axial length from front to back, there is the middle side direction oil outlet that links to each other with return tube by throttle valve in the stage casing of back segment cylinder barrel.
Operating mode needs when the utility model is pressed closure of check ring can be selected the position and the quantity of the middle side direction oil outlet of the degree of depth of length, the oil-return groove of leading portion cylinder barrel and back segment cylinder barrel, quantity that oil-return groove stretches into the back segment inner wall of cylinder vertically and length, back segment cylinder barrel.Middle side direction oil outlet can be a plurality of.
During use, the radially hinging shaft in the front end housing of the present utility model outside is hinged on the hinged axle bed on the check valve body, the damping stopper rod is hinged on the valve shaft fork of safety check.When safety check cuts out because of flowing medium flows backwards, the valve shaft of safety check promotes damping plug by fork and moves to the back segment cylinder barrel from the leading portion cylinder barrel in cylinder barrel, when damping plug moves in the leading portion cylinder barrel backward, the oil of damping plug front can enter return tube and enter the leading portion cylinder barrel with preceding, the middle side direction oil inlet and outlet that links to each other with return tube by leading portion inner wall of cylinder, the circumferential uniform axial oil-return groove in edge, can rapid movement at this section damping plug, but safety check is in leading portion quick closedown major part
When in damping plug enters the back segment cylinder barrel, moving backward, because the back segment inner wall of cylinder has the different oil-return groove of partial-length that stretches into from the leading portion cylinder barrel, recirculating oil quantity reduces along with moving backward, the movement velocity of damping plug reduces gradually, after damping plug moves through the oil-return groove of back segment cylinder barrel, the oil of damping plug front was discharged to oil outlet by the middle side direction oil outlet and the rear side of back segment cylinder barrel before this, only discharge to oil outlet again by rear side, oil drain quantity is reduced gradually, the movement velocity of damping plug reduces once more gradually, the middle side direction oil outlet of back segment cylinder barrel can have a plurality of, at this moment, damping plug is in back segment cylinder barrel movement process backward, whenever by a middle side direction oil outlet, the movement velocity of damping plug reduces, slowing down, it is multistage to divide, slow down steadily, only remaining at last rear side is to the oil outlet oil return, damping plug is that the branch multistage moves to the rear end with slowing down step by step in the back segment cylinder barrel, make safety check quick closedown major part before this, the segmentation throttle down that slows down step by step then, the amplitude that the movement velocity of damping plug reduces is little, avoid because of velocity jump causes system vibration, more conform to the working condition requirement of closing of safety check.
Leading portion inner wall of cylinder of the present utility model, edge circumferentially are evenly equipped with axial oil-return groove, the leading portion cylinder barrel is identical with the internal diameter of back segment cylinder barrel, the guiding device that axial partition between the axial oil-return groove of leading portion inner wall of cylinder just moves as damping plug, the edge, front that makes damping plug when the leading portion cylinder barrel enters the back segment cylinder barrel, can not clash into the back segment cylinder barrel; Axially in the oil-return groove, there is the part oil-return groove differently to stretch into the back segment inner wall of cylinder along the axial length from front to back, can there be a plurality of side direction oil outlets that link to each other with return tube by throttle valve in the stage casing of back segment cylinder barrel, damping plug is entered in back segment cylinder barrel and the motion the back segment cylinder barrel from the leading portion cylinder barrel, recirculating oil quantity is that classification reduces gradually, the movement velocity of damping plug is classification retarded motion gradually, the vibration that damping plug movement velocity sudden change produces can not take place, and makes the motion of damping plug can meet the operating mode needs of closure of check ring well yet.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 cuts open schematic representation according to the master office of looking of a kind of multi-buffer total travel guiding safety check damping oil cylinder of invention scheme proposition of the present utility model;
Fig. 2 is the A-A cross-sectional schematic of Fig. 1;
Fig. 3 is the B-B cross-sectional schematic of Fig. 1;
Fig. 4 is that the C of Fig. 1 is to partial schematic diagram.
Embodiment
Among Fig. 1～Fig. 4, multi-buffer total travel guiding safety check damping oil cylinder has continuous cylinder barrel 1, return tube 2 and oil storage cylinder 24, oil storage cylinder has oil inlet and outlet 3 and pneumostome 4, the pneumostome of oil storage cylinder is connected with air-strainer 5, the front end 6 of return tube links to each other with the oil inlet and outlet of oil storage cylinder, before the cylinder barrel, before back two ends have respectively, back cylinder cover 7,8, the damping plug 9 that matches with clearance fit relationship with cylinder barrel is arranged in the cylinder barrel, the one-way valve 10 that in the past flows to is backward arranged on the damping plug, the front end of cylinder barrel with middle have respectively link to each other with return tube before, middle side direction oil inlet and outlet 11,12, there is the rear side that links to each other with return tube by throttle valve 16 rear end of cylinder barrel to oil outlet 13, damping plug is connected with damping stopper rod 14, damping stopper rod cylinder cap in the past stretches out, there is radially hinging shaft 15 in the outside of front end housing, cylinder barrel DE section vertically is the leading portion cylinder barrel, the EF section is the back segment cylinder barrel, the leading portion inner wall of cylinder, along circumferentially being evenly equipped with 12 axial oil-return grooves 18, axially in the oil-return groove, there are six oil-return grooves to stretch into the leading portion inwall of back segment cylinder barrel vertically, in the oil-return groove that six are stretched into back segment cylinder barrel leading portion inwall, two inwalls 19 that reach preceding 1/15th place of back segment cylinder barrel are arranged, have two reach the back segment cylinder barrel the first eight/place's inwall 20, two inwalls 21 that reach preceding 1/4th places of back segment cylinder barrel are arranged, and there is a middle side direction oil outlet 22 that links to each other with return tube by throttle valve 17 in the stage casing of back segment cylinder barrel.
The stage casing of above-mentioned back segment cylinder barrel has only a middle side direction oil outlet that links to each other with return tube by throttle valve, it is more steady for the deceleration damping plug is slowed down in the back segment cylinder barrel, can there be a plurality of middle side direction oil outlets that link to each other with return tube by throttle valve in the stage casing of back segment cylinder barrel, increase the progression that slows down, slow down and more become steady.The side direction oil outlet can be 2～6 in a plurality of.
Damping plug in the above-mentioned cylinder barrel matches with clearance fit relationship with cylinder barrel.In order to improve the sealing between damping plug and the cylinder barrel, labyrinth sealing 23 is arranged between the excircle of damping plug and the cylinder barrel.
Claims (4)
1. multi-buffer total travel guiding safety check damping oil cylinder, continuous cylinder barrel is arranged, return tube and oil storage cylinder, oil storage cylinder has oil inlet and outlet and pneumostome, the pneumostome of oil storage cylinder is connected with air-strainer, the front end of return tube links to each other with the oil inlet and outlet of oil storage cylinder, before the cylinder barrel, before back two ends have respectively, back cylinder cover, the damping plug that matches with clearance fit relationship with cylinder barrel is arranged in the cylinder barrel, the one-way valve that in the past flows to is backward arranged on the damping plug, the front end of cylinder barrel with middle have respectively link to each other with return tube before, middle side direction oil inlet and outlet, there is the rear side that links to each other with return tube by throttle valve the rear end of cylinder barrel to oil outlet, damping plug is connected with the damping stopper rod, damping stopper rod cylinder cap in the past stretches out, there is radially hinging shaft in the outside of front end housing, cylinder barrel has leading portion cylinder barrel and back segment cylinder barrel vertically, it is characterized in that: the leading portion inner wall of cylinder, along circumferentially being evenly equipped with axial oil-return groove, axially in the oil-return groove, have the part oil-return groove differently to stretch into the leading portion inwall of back segment cylinder barrel along the axial length from front to back, there is the middle side direction oil outlet that links to each other with return tube by throttle valve in the stage casing of back segment cylinder barrel.
2. by the described multi-buffer total travel guiding of claim 1 safety check damping oil cylinder, it is characterized in that: there is a middle side direction oil outlet that links to each other with return tube by throttle valve in the stage casing of described back segment cylinder barrel.
3. by the described multi-buffer total travel guiding of claim 1 safety check damping oil cylinder, it is characterized in that: there are 2～6 middle side direction oil outlets that link to each other with return tube by throttle valve in the stage casing of described back segment cylinder barrel.
4. by claim 1,2 or 3 described multi-buffer total travel guiding safety check damping oil cylinders, it is characterized in that: between described damping plug excircle and the cylinder barrel labyrinth sealing is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201852875U CN201137729Y (en) | 2007-12-28 | 2007-12-28 | Multilevel amortization total distance guiding check-valve damping oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201852875U CN201137729Y (en) | 2007-12-28 | 2007-12-28 | Multilevel amortization total distance guiding check-valve damping oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201137729Y true CN201137729Y (en) | 2008-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201852875U Expired - Fee Related CN201137729Y (en) | 2007-12-28 | 2007-12-28 | Multilevel amortization total distance guiding check-valve damping oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201137729Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003557A (en) * | 2010-11-09 | 2011-04-06 | 南通龙源电站阀门有限公司 | Adjustable high-pressure micro-resistance slow closing check valve for ultradeep coal mine |
| CN104314913A (en) * | 2014-09-18 | 2015-01-28 | 长沙中联消防机械有限公司 | Hydraulic cylinder device and construction vehicle |
| CN104527422A (en) * | 2014-11-19 | 2015-04-22 | 李育正 | Automobile braking device for accidentally stepping on accelerator |
| CN110273392A (en) * | 2019-04-16 | 2019-09-24 | 四川大学 | A kind of adaptive lifting deceleration strip |
| CN112648260A (en) * | 2020-12-11 | 2021-04-13 | 昆山奇力特油缸液压设备有限公司 | Multi-stage cylinder |
| CN113323942A (en) * | 2021-08-03 | 2021-08-31 | 烟台山河液压部件有限公司 | Hydraulic cylinder with high buffer performance |
-
2007
- 2007-12-28 CN CNU2007201852875U patent/CN201137729Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003557A (en) * | 2010-11-09 | 2011-04-06 | 南通龙源电站阀门有限公司 | Adjustable high-pressure micro-resistance slow closing check valve for ultradeep coal mine |
| CN104314913A (en) * | 2014-09-18 | 2015-01-28 | 长沙中联消防机械有限公司 | Hydraulic cylinder device and construction vehicle |
| CN104314913B (en) * | 2014-09-18 | 2017-02-15 | 长沙中联消防机械有限公司 | Hydraulic cylinder device and construction vehicle |
| CN104527422A (en) * | 2014-11-19 | 2015-04-22 | 李育正 | Automobile braking device for accidentally stepping on accelerator |
| CN104527422B (en) * | 2014-11-19 | 2017-09-01 | 李育正 | A kind of brake apparatus of automobile accelerator stepping misoperation preventing |
| CN110273392A (en) * | 2019-04-16 | 2019-09-24 | 四川大学 | A kind of adaptive lifting deceleration strip |
| CN112648260A (en) * | 2020-12-11 | 2021-04-13 | 昆山奇力特油缸液压设备有限公司 | Multi-stage cylinder |
| CN112648260B (en) * | 2020-12-11 | 2024-05-28 | 昆山奇力特油缸液压设备有限公司 | Multistage cylinder |
| CN113323942A (en) * | 2021-08-03 | 2021-08-31 | 烟台山河液压部件有限公司 | Hydraulic cylinder with high buffer performance |
| CN113323942B (en) * | 2021-08-03 | 2021-10-19 | 烟台山河液压部件有限公司 | Hydraulic cylinder with buffer performance |
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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 |