CN203223628U - Self-reliance type adjustable valve slowly-closing device - Google Patents
Self-reliance type adjustable valve slowly-closing device Download PDFInfo
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- CN203223628U CN203223628U CN 201320270499 CN201320270499U CN203223628U CN 203223628 U CN203223628 U CN 203223628U CN 201320270499 CN201320270499 CN 201320270499 CN 201320270499 U CN201320270499 U CN 201320270499U CN 203223628 U CN203223628 U CN 203223628U
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Abstract
The utility model relates to a self-reliance type adjustable valve slowly-closing device which comprises a buffering cylinder. The buffering cylinder comprises a cylinder body, a piston, an end cover and a piston rod. One end of the piston rod is connected with a spline sleeve, the other end of the spline sleeve is fixedly connected with a valve rotating shaft, the outer circle face of the spline sleeve is matched with the end cover in a motive seal mode, a swivel nut is fixedly mounted in the cylinder body between the piston and the end cover, the middle section of the piston rod is matched with the swivel nut in a threaded mode, and a fast-closing channel, a throttling channel and a fast-opening channel are arranged between a rear oil cavity and a front oil cavity of the piston. In the beginning closing stage of valve clack, liquid in the rear oil cavity is quickly discharged to the front oil cavity through a flow guiding hole in the fast-closing channel, and the valve clack is quickly closed. When the valve clack is closed to 5-10 opening degree, liquid in the rear oil cavity slowly flows to the front oil cavity through the throttling channel, and the valve clack is slowly closed. The self-reliance type adjustable valve slowly-closing device has the advantages of being short in closing time, good in slowly-closing performance and the like, and is especially suitable for a slowly-closing type check valve slowly-closing device.
Description
Technical field
The utility model relates to a kind of valve hydraulic control slow closing device.The utility model is applicable to the slow closed check damper slow closing device.
Background technique
Slow closed check damper is installed on steam turbine, exit of pump, prevents the control valve that medium flows backwards.Existing slow closed check damper is generally fixed a weight by support on the valve body of safety check, weight is fixedlyed connected with the rotating shaft of safety check flap by the weight axle, utilization is lifted the potential energy converting and energy of weight and is the kinetic energy of closing of flap, the quick closedown flap, prevent that the medium refluence from causing that steam turbine or water pump reversing damage, and when flap is closed to 10 ° of aperture positions, slowly close, prevent water hammer.Its shortcoming is: because that starting stage of weight circular motion track is tending towards level is mild, transformation of energy is very slow, and initial closing velocity is slow, causes the shut-in time long, influences the usability of heavy hammer type hydraulic control slow closing safety check.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, provides a kind of closing velocity fast, and the shut-in time is short, the self-powering type adjustable gate slow closing device that the Slow Close performance is good.
The technical solution of the utility model comprises bounce cylinder, bounce cylinder comprises cylinder body, piston, end cap, piston rod, cylinder body is fixedlyed connected with the valve body of valve, one end of piston rod and piston fixed seal connection, the other end that mainly is piston rod is connected with spline housing, the other end of spline housing is fixedlyed connected with valve hinges, the spline housing periphery cooperates with the end cap motive sealing, fixed installation one swivel nut in the cylinder body between piston and end cap, position, piston rod stage casing and swivel nut screw-thread fit, the center of piston rod is shaped on the equalizing orifice that is communicated with oil pocket and preceding oil pocket behind the piston, in equalizing orifice, be provided with diversion rod, one end cylindrical of diversion rod and equalizing orifice inwall are movingly, the other end and cylinder body fixed seal connection, the center of diversion rod is shaped on the pod apertures that is communicated with equalizing orifice, diversion rod middle part is shaped on the fast discharge orifice that is communicated with oil pocket behind pod apertures and the piston, diversion rod periphery between this fast discharge orifice and cylinder body interior edge face is shaped on sealed step, the port of piston rod equalizing orifice is shaped on the sealing seat that cooperatively interacts with sealed step, be provided with throttling passage between back oil pocket and the preceding oil pocket, piston is provided with one-way valve, the advancing of this one-way valve, the outlet respectively with preceding oil pocket, back oil pocket is communicated with.
In above technological scheme, piston rod has bigger aperture near the equalizing orifice at sealing seat place.
In above technological scheme, described throttling passage is made up of throttle valve and throttle orifice, and an end of throttle orifice is communicated with the back oil pocket, and the other end is communicated with the import of throttle valve, and the outlet of throttle valve is communicated with pod apertures.
In above technological scheme, the diversion rod end that is positioned at cylinder body connects a fixed guide bar, and the sealing of this fixed guide bar is installed on the cylinder body, and the employing rectangular teeth cooperatively interacts and is connected between fixed guide bar and the diversion rod end, and described throttle orifice is arranged in the cylinder body.
The utility model has the advantages that rotatablely moving of flap is converted to the straight line motion of piston by spline and piston rod, the preceding oil pocket of piston both sides and back oil pocket are communicated with throttle orifice by pod apertures, close the starting stage at flap, back oil pocket liquid to preceding oil pocket, makes the flap quick closedown by the quick bleed off of pod apertures; When flap closed to 5-10 degree aperture, by the sealed step seal isolation of the sealing seat of piston rod and diversion rod, back oil pocket liquid slowly flow to preceding oil pocket by the throttle orifice passage, and flap is slowly closed between fast discharge orifice and the back oil pocket.Have short, characteristics such as the Slow Close performance is good of shut-in time.
Description of drawings
Fig. 1 is structure sectional view of the present utility model.
Embodiment
Self-powering type adjustable gate slow closing device as shown in Figure 1, comprise bounce cylinder, bounce cylinder comprises cylinder body 12, piston 7, end cap 2, piston rod 3, cylinder body 12 is fixedlyed connected with the valve body of valve, one end of piston rod 3 and piston 7 fixed seal connections, the other end of piston rod 3 is connected with spline housing 1, the other end of spline housing 1 is fixedlyed connected with valve hinges, spline housing 1 periphery cooperates with end cap 2 motive sealings, axially stationary fit between spline housing 1 and the end cap 2, be that spline housing 1 can rotate at end cap 2, but the axial direction secure fit.Fixed installation one swivel nut 5 in the cylinder body 12 between piston 7 and end cap 2, piston rod position, 3 stage casing and swivel nut 5 screw-thread fit, the rotation of flap drives spline housing 1 rotation, and piston rod 3 is moved axially with respect to spline housing 1, and it is mobile in cylinder body 12 to drive piston 7.The center of piston rod 3 is shaped on the equalizing orifice that is communicated with oil pocket D and preceding oil pocket B behind the piston, makes the quick balance of pressure of its preceding oil pocket B and back oil pocket D when piston 7 moves.In equalizing orifice, be provided with diversion rod 11, one end cylindrical of diversion rod 11 and equalizing orifice inwall are movingly, the other end and cylinder body 12 fixed seal connections, the center of diversion rod 11 is shaped on the pod apertures that is communicated with equalizing orifice, diversion rod 11 middle parts are shaped on the fast discharge orifice E that is communicated with pod apertures and piston 7 back oil pocket D, the equalizing orifice at piston rod 3 centers, the pod apertures on the diversion rod 11 and fast discharge orifice E form the fast circulation road between back oil pocket D and the preceding oil pocket B, i.e. the quick closing valve passage of controlled valve.Diversion rod 11 peripheries between fast discharge orifice E and cylinder body 12 interior edge faces are shaped on sealed step F, the port of piston rod 3 equalizing orifices is shaped on the sealing seat G that cooperatively interacts with sealed step F, when flap closes to 5-10 degree aperture, sealing seat G and sealed step F are sealed and matched, with fast discharge orifice E and back oil pocket D seal isolation.Be provided with throttling passage between back oil pocket D and the preceding oil pocket B, when sealed step F and sealing seat G were sealed and matched, oil pocket B before back oil pocket D medium is flowed to by throttling passage slowly closed valve.Piston 7 is provided with one-way valve C, and the import and export of this one-way valve C are communicated with preceding oil pocket B, back oil pocket D respectively, and when flap was opened, preceding oil pocket B and back oil pocket D were communicated with by one-way valve C, and flap is opened fast.The transverse holes A of oil pocket B and equalizing orifice before piston rod 3 is shaped on and is communicated with.
Piston rod 3 has bigger aperture near the equalizing orifice at sealing seat G place, namely the equalizing orifice aperture near sealing seat G place is bigger than the equalizing orifice aperture at all the other positions at piston rod 3 centers, make near between the equalizing orifice at sealing seat G place and the diversion rod 11 and form annular space, guarantee sealing seat G with before sealed step F is sealed and matched afterwards oil pocket D be communicated with discharge orifice E maintenance soon.
Described throttling passage is made up of throttle valve 9 and throttle orifice H, the end of throttle orifice H is communicated with back oil pocket D, the other end is communicated with the import of throttle valve 9, the outlet of throttle valve 9 is communicated with the pod apertures of diversion rod 11, valve seat 8 fixing seals of throttle valve 9 are installed in the outer wall of cylinder body 12, after sealing seat G and sealed step F were sealed and matched, back oil pocket D was communicated with preceding oil cylinder B by throttle orifice, throttle valve 9, reaches the effect of slowly closing.Throttle valve 9 adopts the modulating valve structure, by regulating the negotiability of throttle valve 9, can realize regulating the Slow Close time.
Claims (4)
1. self-powering type adjustable gate slow closing device, comprise bounce cylinder, bounce cylinder comprises cylinder body (12), piston (7), end cap (2), piston rod (3), cylinder body (12) is fixedlyed connected with the valve body of valve, one end of piston rod (3) and piston (7) fixed seal connection, the other end that it is characterized in that piston rod (3) is connected with spline housing (1), the other end of spline housing (1) is fixedlyed connected with valve hinges, spline housing (1) periphery cooperates with end cap (2) motive sealing, fixed installation one swivel nut (5) in the cylinder body (12) between piston (7) and end cap (2), piston rod (3) position, stage casing and swivel nut (5) screw-thread fit, the center of piston rod (3) is shaped on the equalizing orifice that is communicated with oil pocket (D) and preceding oil pocket (B) behind the piston, in equalizing orifice, be provided with diversion rod (11), one end cylindrical of diversion rod (11) and equalizing orifice inwall are movingly, the other end and cylinder body (12) fixed seal connection, the center of diversion rod (11) is shaped on the pod apertures that is communicated with equalizing orifice, diversion rod (11) middle part is shaped on the fast discharge orifice (E) that is communicated with pod apertures and piston (7) back oil pocket (D), diversion rod (11) periphery between fast discharge orifice (E) and cylinder body (12) interior edge face is shaped on sealed step (F), the port of piston rod (3) equalizing orifice is shaped on the sealing seat (G) that cooperatively interacts with sealed step (F), be provided with throttling passage between back oil pocket (D) and the preceding oil pocket (B), piston (7) is provided with one-way valve (C), the import of this one-way valve (C) and the outlet respectively with preceding oil pocket (B), back oil pocket (D) is communicated with.
2. self-powering type adjustable gate slow closing device according to claim 1 is characterized in that the equalizing orifice that piston rod (3) is located near sealing seat (G) has bigger aperture.
3. self-powering type adjustable gate slow closing device according to claim 1 and 2, it is characterized in that throttling passage is made up of throttle valve (9) and throttle orifice (H), one end of throttle orifice (H) is communicated with back oil pocket (D), the other end is communicated with the import of throttle valve (9), and the outlet of throttle valve (9) is communicated with pod apertures on the diversion rod (11).
4. self-powering type adjustable gate slow closing device according to claim 3, diversion rod (11) end that it is characterized in that being positioned at cylinder body (12) connects a fixed guide bar (10), this fixed guide bar (10) sealing is installed on the cylinder body (12), adopt rectangular teeth to cooperatively interact between fixed guide bar (10) and diversion rod (11) end and be connected, described throttle orifice is arranged in the cylinder body (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270499 CN203223628U (en) | 2013-05-02 | 2013-05-02 | Self-reliance type adjustable valve slowly-closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270499 CN203223628U (en) | 2013-05-02 | 2013-05-02 | Self-reliance type adjustable valve slowly-closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203223628U true CN203223628U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320270499 Withdrawn - After Issue CN203223628U (en) | 2013-05-02 | 2013-05-02 | Self-reliance type adjustable valve slowly-closing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203223628U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106369010A (en) * | 2016-10-27 | 2017-02-01 | 华南理工大学 | Adjustable high-speed cylinder buffer device and method |
-
2013
- 2013-05-02 CN CN 201320270499 patent/CN203223628U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106369010A (en) * | 2016-10-27 | 2017-02-01 | 华南理工大学 | Adjustable high-speed cylinder buffer device and method |
| CN106369010B (en) * | 2016-10-27 | 2018-04-13 | 华南理工大学 | A kind of adjustable Cushion of High-speed Pneumatic Cylinders apparatus and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20150722 |
|
| RGAV | Abandon patent right to avoid regrant |