CN102305309A - Hydraulic damping device for valve - Google Patents
Hydraulic damping device for valve Download PDFInfo
- Publication number
- CN102305309A CN102305309A CN 201110220500 CN201110220500A CN102305309A CN 102305309 A CN102305309 A CN 102305309A CN 201110220500 CN201110220500 CN 201110220500 CN 201110220500 A CN201110220500 A CN 201110220500A CN 102305309 A CN102305309 A CN 102305309A
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- cylinder body
- piston
- damping device
- piston rod
- valve
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Abstract
The invention relates to a hydraulic damping device for a valve, and is mainly used for solving the problem of the existing pneumatic control valve that the valve or cylinder is easily damaged due to large impact force when in use. The hydraulic damping device is characterized in that one end of a piston rod (21) extends out of a bottom cap (3), and the other end of the piston rod (21) passes through the bottom of a cylinder body (1) and the end is arranged in an end cover (4); a piston (22) is positioned in the closed cylinder body (1) and divides the inner cavity of the cylinder body (1) into two chambers; the two chambers are communicated with each other via a pore path arranged in the side wall of the cylinder body (1); the inner cavity of the cylinder body (1)is filled with hydraulic oil; the end cover (4) is internally provided with a locating gland (5); and a spring (6) is arranged between the locating gland (5) and the piston rod (21). By adopting the hydraulic damping device, the impact force on a valve base is effectively retarded when the valve reaches the terminal position, and meanwhile damage of cylinder components are avoided. The hydraulic damping device has the characteristics of compact structure, high safety and high reliability.
Description
Technical field
The present invention relates to a kind of damping device, be specifically related to a kind of hydraulic damping device that is used for valve.
Background technique
At present, pneumatic control valve is a kind of valve of using always, and existing pneumatic control valve mainly is made up of valve, cylinder and solenoid valve, and the switching-over through solenoid valve realizes the bidirectional-movement of cylinder, by the opening and closing of cylinder control valve door.There is following defective in this pneumatic control valve: because the impact force of cylinder is bigger; When valve closing incoming terminal position; Valve seat in the valve can receive very big impact force; The suffered impact force of valve rod reacts on cylinder piston rod simultaneously, is prone to cause the damage of valve or cylinder, shortens the working life of valve.
Summary of the invention
Impact force is big in use in order to solve existing pneumatic control valve; Be prone to cause the problem of valve or cylinder damage; The present invention provides a kind of hydraulic damping device that is used for valve; To the impact force of valve seat, also avoided parts damages simultaneously when this hydraulic damping device that is used for valve has slowed down valve incoming terminal position effectively, had compact structure and safe and reliable characteristics cylinder.
Technological scheme of the present invention is: this hydraulic damping device that is used for valve comprises cylinder body, piston assembly, bottom and end cap; Bottom and end cap are connected to the two ends of cylinder body; Piston assembly includes piston rod and piston, and an end of piston rod passes bottom and stretch out the termination, and bottom and termination that the other end of piston rod passes cylinder body place in the end cap; Piston is positioned at airtight cylinder body; Piston is divided into two chambers with the inner chamber of cylinder body, and described two chambers communicate through the duct in the cylinder side wall, are full of hydraulic oil in the inner chamber of cylinder body; Be provided with the location gland in the end cap, be provided with spring between location gland and the piston rod.
The inner chamber of described cylinder body is divided into chamber, big footpath and path chamber; The path chamber is in a side of cylinder base; Piston has the space with the sidewall in chamber, big footpath; Piston and the motive sealing of path chamber are provided with Flow-rate adjustment duct and one-way resetting duct that chamber, big footpath and path chamber are communicated in the sidewall of cylinder body, be separately installed with flow control valve and one-way valve in Flow-rate adjustment duct and the one-way resetting duct.
Be fixed with screw mandrel on the gland of described location, screw mandrel and end cap screw-thread fit, rotary screw can make the displacement vertically of location gland.
Described screw mandrel is provided with locking nut.
Be fixed with the spring setting sleeve on the gland of described location, be connected with on the described piston rod and split annulus, an end of spring is enclosed within on the piston rod and is spacing by splitting annulus, and the other end of spring is enclosed within on the limited post on the gland of location.
Be equipped with through hole on described bottom and the cylinder body, in described two the through hole concentrics, two through holes all built-up welding copper alloy layer is arranged, part pile-up welding hard alloy layer contacts with the position of copper alloy layer on the piston rod.
" O " RunddichtringO and " Y " RunddichtringO all are installed in described two through holes.
The present invention has following beneficial effect: owing to take such scheme, in use, this device is installed in the bottom of cylinder; The piston rod of bottom outside is corresponding with the piston in the cylinder, and when throttle down, the piston slap in the cylinder is to the outside piston rod of bottom; Spring is compressed, and the hydraulic oil in the interior chamber of cylinder body flows into another chamber through the duct in the cylinder side wall, forms the buffer piston effect; After external force disappeared, piston assembly resetted under the effect of spring, when this device has slowed down valve incoming terminal position effectively to the impact force of valve seat; Also avoided the parts damages in the cylinder simultaneously, had compact structure and safe and reliable characteristics.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is the A-A structure sectional views among Fig. 1.
1-cylinder body among the figure, the 2-piston assembly, the 3-bottom, the 4-end cap, 5-locatees gland, 51-limited post; The 6-spring, chamber, the big footpath of 7-, 8-path chamber, 9-Flow-rate adjustment duct, 10-one-way resetting duct, 11-flow control valve; The 12-one-way valve, the 13-screw mandrel, the 14-locking nut, 15-spring setting sleeve, 16-splits annulus, the 17-copper alloy layer; The 18-hard alloy layer, 19-" O " RunddichtringO, 20-" Y " RunddichtringO, 21-piston rod, 22-piston.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further:
Combine shown in Figure 2 by Fig. 1; This hydraulic damping device that is used for valve comprises cylinder body 1, piston assembly 2, bottom 3 and end cap 4, and bottom 3 and end cap 4 are connected to the two ends of cylinder body 1, and piston assembly 2 includes piston rod 21 and piston 22; One end of piston rod 21 passes bottom 3 and stretch out the termination; Bottom and termination that the other end of piston rod 21 passes cylinder body 1 place in the end cap 4, and piston 22 is positioned at airtight cylinder body 1, and piston 22 is divided into two chambers with the inner chamber of cylinder body 1; Described two chambers communicate through the duct in cylinder body 1 sidewall, are full of hydraulic oil in the inner chamber of cylinder body 1; Be provided with location gland 5 in the end cap 4, be provided with spring 6 between location gland 5 and the piston rod 21.In use, this device is installed in the bottom of cylinder, and the piston rod 21 of bottom 3 outsides is corresponding with the piston in the cylinder; When throttle down, the piston slap in the cylinder is to the piston rod 21 of bottom 3 outsides, and spring 6 is compressed; Hydraulic oil in the cylinder body 1 interior chamber (path chamber 8) flows into another chamber (chamber 7, big footpath) through the duct in cylinder body 1 sidewall, forms the buffer piston effect, after external force disappears; Piston assembly 2 resets under the effect of spring 6; To the impact force of valve seat, also avoided the parts damages in the cylinder simultaneously when this device has slowed down valve incoming terminal position effectively, had compact structure and safe and reliable characteristics.
Combine shown in Figure 2 by Fig. 1; The inner chamber of cylinder body 1 is divided into chamber, big footpath 7 and path chamber 8; Path chamber 8 is in a side of cylinder body 1 bottom, and piston 22 has the space, piston 22 and 8 motive sealings of path chamber with the sidewall in chamber 7, big footpath; Be provided with Flow-rate adjustment duct 9 and one-way resetting duct 10 that chamber, big footpath 7 and path chamber 8 are communicated in the sidewall of cylinder body 1, be separately installed with flow control valve 11 and one-way valve 12 in Flow-rate adjustment duct 9 and the one-way resetting duct 10.When piston rod 21 receives external force effect campaign; Piston 22 gets into path chamber 8, forms the buffer piston effect, and the hydraulic oil in the path chamber 8 gets in the chamber 7, big footpath from Flow-rate adjustment duct 9; Can adjust the flow size through regulating flow control valve 11; And then adjust buffer time, at this moment, the one-way valves 12 in the one-way resetting duct 10 are closed.After external force disappears, at the effect lower piston 22 of spring 6 to 7 motions of chamber, big footpath, at this moment; One-way valve 12 in the one-way resetting duct 10 is opened; Hydraulic oil refluxes fast, and when piston 22 broke away from path chamber 8 fully, chamber 7, big footpath directly communicated through the space of piston 22 with chamber, big footpath 7 sidewalls with path chamber 8 interior hydraulic oil; Pressure balance, piston 22 resets fast.
By shown in Figure 1, be fixed with screw mandrel 13 on the gland 5 of location, screw mandrel 13 and end cap 4 screw-thread fit, rotary screw 13 can make the displacement vertically of location gland 5.Can regulate the position at dead point, the i.e. stroke of regulating piston assembly 2 through screw mandrel 13.Piston rod 21 will increase with the degree of overlapping in path chamber 8 thereupon this moment, can realize the control to buffer time through the back-flow velocity of flow control valve 11 adjustment hydraulic oil.
By shown in Figure 1, screw mandrel 13 is provided with locking nut 14.After set up the position of location gland 5, by locking nut 14 lockings.
By shown in Figure 1, the location is fixed with spring setting sleeve 15 on the gland 5, is connected with on the described piston rod 21 and splits annulus 16, and an end of spring 6 is enclosed within on the piston rod 21 and is spacing by splitting annulus 16, and the other end of spring 6 is enclosed within on the limited post 51 on the gland 5 of location.Compact structure is convenient to install.
By shown in Figure 1, be equipped with through hole on bottom 3 and the cylinder body 1, in described two the through hole concentrics, two through holes all built-up welding copper alloy layer 17 is arranged, part pile-up welding hard alloy layer 18 contacts with the position of copper alloy layer 17 on the piston rod 21.Make the frictional contact surface of piston rod 21 form bigger difference of hardness, improved piston rod 21 surface hardnesses and wear-resisting property, guaranteed working life.
By shown in Figure 1, " O " RunddichtringO 19 and " Y " RunddichtringO 20 are installed all in described two through holes.Form double-layer seal, good sealing effect.
Claims (7)
1. hydraulic damping device that is used for valve; Comprise cylinder body (1), piston assembly (2), bottom (3) and end cap (4), bottom (3) and end cap (4) are connected to the two ends of cylinder body (1), and piston assembly (2) includes piston rod (21) and piston (22); It is characterized in that: an end of piston rod (21) passes bottom (3) and stretch out the termination; Bottom and termination that the other end of piston rod (21) passes cylinder body (1) place in the end cap (4), and piston (22) is positioned at airtight cylinder body (1), and piston (22) is divided into two chambers with the inner chamber of cylinder body (1); Described two chambers communicate through the duct in cylinder body (1) sidewall, are full of hydraulic oil in the inner chamber of cylinder body (1); Be provided with location gland (5) in the end cap (4), be provided with spring (6) between location gland (5) and the piston rod (21).
2. the hydraulic damping device that is used for valve according to claim 1; It is characterized in that: the inner chamber of cylinder body (1) is divided into chamber, big footpath (7) and path chamber (8); Path chamber (8) is in a side of cylinder body (1) bottom; Piston (22) has the space with the sidewall in big chamber, footpath (7); Piston (22) and path chamber (8) motive sealing, cylinder body (1) sidewall in be provided with Flow-rate adjustment duct (9) and one-way resetting duct (10) that chamber, big footpath (7) and path chamber (8) are communicated, be separately installed with flow control valve (11) and one-way valve (12) in Flow-rate adjustment duct (9) and one-way resetting duct (10).
3. the hydraulic damping device that is used for valve according to claim 1 and 2 is characterized in that: be fixed with screw mandrel (13) on the location gland (5), screw mandrel (13) and end cap (4) screw-thread fit, rotary screw (13) can make the displacement vertically of location gland (5).
4. the hydraulic damping device that is used for valve according to claim 3 is characterized in that: screw mandrel (13) is provided with locking nut (14).
5. the hydraulic damping device that is used for valve according to claim 3; It is characterized in that: be fixed with spring setting sleeve (15) on the location gland (5); Be connected with on the described piston rod (21) and split annulus (16); It is last and spacing by splitting annulus (16) that one end of spring (6) is enclosed within piston rod (21), and the other end of spring (6) is enclosed within on the limited post (51) on the location gland (5).
6. the hydraulic damping device that is used for valve according to claim 1 and 2; It is characterized in that: be equipped with through hole on bottom (3) and the cylinder body (1); Described two through hole concentrics; Equal built-up welding have copper alloy layer (17) in two through holes, the last part pile-up welding hard alloy layer (18) that contacts with the position of copper alloy layer (17) of piston rod (21).
7. the hydraulic damping device that is used for valve according to claim 6 is characterized in that: " O " RunddichtringO (19) and " Y " RunddichtringO (20) all are installed in described two through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220500A CN102305309B (en) | 2011-08-03 | 2011-08-03 | Hydraulic damping device for valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220500A CN102305309B (en) | 2011-08-03 | 2011-08-03 | Hydraulic damping device for valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102305309A true CN102305309A (en) | 2012-01-04 |
| CN102305309B CN102305309B (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110220500A Active CN102305309B (en) | 2011-08-03 | 2011-08-03 | Hydraulic damping device for valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102305309B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062491A (en) * | 2013-01-29 | 2013-04-24 | 河海大学常州校区 | Valve buffer |
| CN103075570A (en) * | 2013-01-29 | 2013-05-01 | 河海大学常州校区 | Valve buffer |
| CN103244746A (en) * | 2013-05-02 | 2013-08-14 | 伯特利阀门集团有限公司 | Self-power adjustable valve slow-closing device |
| CN109707784A (en) * | 2019-01-16 | 2019-05-03 | 大连富地重工机械制造有限公司 | Pneumatic buffer device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048905A (en) * | 1976-03-29 | 1977-09-20 | The Boeing Company | Variable orifice hydraulic snubber |
| JPS61179435U (en) * | 1985-04-25 | 1986-11-08 | ||
| JPH09217775A (en) * | 1996-02-12 | 1997-08-19 | Sumitomo Constr Co Ltd | Damping device |
| CN202220898U (en) * | 2011-08-03 | 2012-05-16 | 浙江石化阀门有限公司 | Hydraulic damping device for valve |
-
2011
- 2011-08-03 CN CN201110220500A patent/CN102305309B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048905A (en) * | 1976-03-29 | 1977-09-20 | The Boeing Company | Variable orifice hydraulic snubber |
| JPS61179435U (en) * | 1985-04-25 | 1986-11-08 | ||
| JPH09217775A (en) * | 1996-02-12 | 1997-08-19 | Sumitomo Constr Co Ltd | Damping device |
| CN202220898U (en) * | 2011-08-03 | 2012-05-16 | 浙江石化阀门有限公司 | Hydraulic damping device for valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062491A (en) * | 2013-01-29 | 2013-04-24 | 河海大学常州校区 | Valve buffer |
| CN103075570A (en) * | 2013-01-29 | 2013-05-01 | 河海大学常州校区 | Valve buffer |
| CN103244746A (en) * | 2013-05-02 | 2013-08-14 | 伯特利阀门集团有限公司 | Self-power adjustable valve slow-closing device |
| CN109707784A (en) * | 2019-01-16 | 2019-05-03 | 大连富地重工机械制造有限公司 | Pneumatic buffer device and method |
| CN109707784B (en) * | 2019-01-16 | 2024-02-23 | 大连富地重工机械制造有限公司 | Pneumatic buffering device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102305309B (en) | 2012-10-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Jianbin Inventor after: Wang Jingwang Inventor after: Su Jingpan Inventor after: Su Miaohou Inventor after: Hu Jiantian Inventor after: Guan Lili Inventor before: Wu Jianbin Inventor before: Wang Jingwang Inventor before: Su Jingpan Inventor before: Su Miaohou Inventor before: Wang Zhongyuan Inventor before: Xiang Shanhu |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WU JIANBIN WANG JINGWANG SU JINGPAN SU MIAOHOU WANG ZHONGYUAN XIANG SHANHUTO: WU JIANBIN WANG JINGWANG SU JINGPAN SU MIAOHOU HU JIANTIAN GUAN LILI |