CN100404938C - Water hammer prevention device for check valve - Google Patents
Water hammer prevention device for check valve Download PDFInfo
- Publication number
- CN100404938C CN100404938C CNB2004100458355A CN200410045835A CN100404938C CN 100404938 C CN100404938 C CN 100404938C CN B2004100458355 A CNB2004100458355 A CN B2004100458355A CN 200410045835 A CN200410045835 A CN 200410045835A CN 100404938 C CN100404938 C CN 100404938C
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- Prior art keywords
- stream
- valve body
- annulus
- valve
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- Expired - Lifetime
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000002265 prevention Effects 0.000 title 1
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 239000011148 porous material Substances 0.000 claims description 32
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
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- Check Valves (AREA)
Abstract
The present invention provides a simple-structured water impact preventing device capable of effectively preventing water impact, which has the structure that a brake pipe (15) with openings on both ends is arranged in a short pipe (7) so that the brake pipe (15) and the short pipe (7) form an annular space (16), an opening (17) is formed on the brake pipe, an elastic pipe (18) is covered on the opening (17) on the outer circumferential surface of the brake pipe, and a flow path (3) is formed between the short pipe (7) and a valve body seat (2) so as to communicate the annular space (16) with the upstream side of the valve body; when a fluid reversely flows, part of the fluid enables the elastic pipe (18) to retract from the opening to the annular space (16) side in an expanding mode, and part of the fluid in the annular space 16 flows to passages (27, 35, 36, 37) of the flow path (3) on the upstream side of the valve body.
Description
Technical field
The present invention relates to a kind of anti-locking apparatus of water slug that is arranged on the safety check on the pipelines such as for example going up water, industrial water.
Background technique
As this safety check all styles of safety check such as swing, butterfly, rise-fall type or circular cone type are arranged, and swing safety check is provided with: as basic structure and have the valve cap of stream; Can switch this valve cap stream and be installed in valve body (for example, referring to Patent Document 1) on the valve shaft freely to rotate.
Patent documentation 1 record be a kind of swing safety check, it with spring with valve body rotationally bullet to the valve closing direction; Above-mentioned spring is wound on the spring guide rod, this spring guide rod is to be arranged on abreast on the downstream position that leaves valve shaft with valve shaft, use this structure, by spring make act on the valve body, bullet strengthens to the elastic force of valve closing direction, consequently can make valve body switch promptly, guarantee to prevent the generation of water slug (water hammer).
[patent documentation 1] Japan Patent open report spy opens flat 7-145870 number
Though above-mentioned patent documentation 1 record is with the hydrodynamic pressure of upstream side output valve body to be opened, when fluid countercurrent current, valve body is rotated to the direction of closing, can prevent closing rapidly of safety check by the spring that elastic force strengthens, but, as mentioned above, be necessary to be provided with members such as spring guide rod or bearing guide member in order to prevent water slug, at that rate, when causing the interior structure of valve cap to complicate, also need to drop into the corresponding apparatus expense, thereby caused the problem of high cost.In view of such problem, once proposed on valve body, to offer the scheme of little valve opening, still, this scheme must be provided for closing the little valve body of little valve opening again in addition, owing to will move often, thereby the problem that makes the valve body damage is easily arranged.In addition, the scheme of the bypass line that upstream side that a kind of outer installment at valve cap is used to make the valve cap stream is communicated with the downstream side was once proposed, owing to must guarantee to have space to a certain degree, so there is collision problem in this scheme aspect being provided with in the outside of valve cap.
The present invention then solves the existing problem of above-mentioned existence, and its objective is provides a kind of water slug simple in structure, the safety check that can prevent water slug effectively anti-locking apparatus.
Summary of the invention
In order to achieve the above object, and the anti-locking apparatus of the water slug of the safety check of making of the present invention, it is provided with: the valve block with stream; Dispose the hollow short pipe of both ends open, one end opening portion is communicated with the stream of this valve block; On above-mentioned valve block, valve body can be set the switch stream, and setting above-mentioned valve body bullet to the resilient member that closes the valve direction, it is characterized in that, in above-mentioned short tube, the Brake pipe of both ends open be adapted to and short tube between form annulus, on this Brake pipe, be formed with opening, and cover this opening and on outer circumferential face, setting spring tube like that, above-mentioned annulus is communicated with the stream of valve body upstream side, when fluid countercurrent current, wherein a part of fluid, from opening, spring tube is expanded in the annulus side, and take in the annulus, and make the stream of the part of annulus inner fluid, between short tube and valve body, form access by the upstream side of valve body.
Technological scheme 4 according to the present invention is characterized in that in the anti-locking apparatus of the water slug of above-mentioned safety check: above-mentioned connection stream by the bypass valve chamber on the short tube that is formed on the valve body side, make intercommunicating pore that this valve chamber and annulus be communicated with, intercommunicating pore that the stream that makes above-mentioned valve chamber and valve body upstream side is communicated with constitutes.
In the anti-locking apparatus of the water slug of technological scheme 5 safety check of the present invention, it is characterized in that: the intercommunicating pore that above-mentioned bypass valve chamber and annulus are communicated with is the axis almost parallel ground formation with short tube; The intercommunicating pore that makes the stream connection of bypass valve chamber and valve body upstream side is that the direction to the stream center of valve body upstream side is formed obliquely.
Because the present invention is in short tube, with the concentric shape of Brake pipe of both ends open be adapted to and short tube between form annulus, on this Brake pipe, be formed with opening, and cover this opening and on outer circumferential face, setting spring tube like that, and formation makes above-mentioned annulus be communicated with the stream of valve body upstream side between short tube and valve block, when fluid countercurrent current, with a part of fluid, spring tube is taken in from opening to the annulus side with expanding, make the path of the interior a part of fluid of annulus to the stream circulation of valve body upstream side, even thereby generation is risen by the rapid pressure that adverse current causes in stream, also can this pressure be discharged in the annulus by spring tube is expanded, on the other hand, can can prevent water slug effectively thus by making a part of fluid in the annulus from being communicated with stream and being passed to the stream of valve body upstream side and discharging.And, structurally, in short tube, being provided with in Brake pipe and the spring tube, access only is set between short tube and valve block just can simplified structure, and cost of equipment can be suppressed to lower.
Description of drawings
Fig. 1 is the vertical disconnected front view of the swing safety check of expression one embodiment of the present invention.
Fig. 2 is the side view that is omitted from the right-hand part that the left side of Fig. 1 is seen.
Fig. 3 is the side view that is omitted from the left side that the right side of Fig. 1 is seen.
Symbol description
1 swing safety check 2 valve blocks 3 streams 5 valve bodies 6 valve shaft 7 short tubes, 10 springs (resilient member) 11 valve seats 13,14 annular convex, 15 Brake pipes, 16 annuluses, 17 openings, 18 spring tubes, 23 brake hoops, 25 outlet rings, 26 bypass valve, 27 bypass valve chambers, 33 intercommunicating pores 35,36,37 intercommunicating pores
Embodiment
Below, with reference to accompanying drawing an embodiment of the invention are described.Fig. 1 is the vertical disconnected front view of the swing safety check of expression one embodiment of the present invention, and Fig. 2 is the side view that is omitted from the right-hand part that the left side of Fig. 1 is seen, Fig. 3 is the side view that is omitted from the left side that the right side of Fig. 1 is seen.The 1st, swing safety check, the 2nd, its valve block (valve cap), the inner short stream 3 of axial length that forms, the valve body 5 that this stream is carried out switch is supported by valve shaft 6 and can be provided with freely to rotate.The 7th, the stream 3 of the hollow short pipe of both ends open, an end opening portion and valve block 2 is setting communicatively.
The 3a of center hole portion that the stream 3 of valve block 2 is made to it is slightly downwards prejudicially at its central part from the central axis X of stream 3.The 3a of center hole portion is made into parallel with central axis X and to constitute its axial length of upstream side shorter than the axial length in the downstream side on Fig. 1.The 3a of center hole portion also be made into upstream side edge part from it, towards with the upstream side opening of the concentric stream 3 of central axis X, be and expand the conical surface 3b that opens shape.Annular recessed portion 3c is formed on the downstream side of the 3a of center hole portion, and valve body 5 is entrenched on this recess and is disposing.Valve body 5 by an end is installed on the valve shaft 6 with inserting, the other end and the valve body back side are disposing in contact spring 10 frequent bullets to the direction of closing valve.Be in contact with it the back side central part of the other end pushing valve body 5 of spring 10, can making the elastic force of the spring 10 that is applied on the valve body periphery become even.The 11st, valve is under the complete closed state, with the contacted valve seat of upstream side outer circumferential face of valve body 5, be configured in the form of a ring on the side that the central axis X with stream 3 of annular recessed portion 3c intersects vertically.
Though hollow short pipe 7 is made of roughly identical with valve block 2 external diameter, two end part form inwardly annular convex 13,14, formation annulus 16 and setting between the Brake pipe 15 of the inboard between these two annular convex, both ends open and short tube 7 with becoming concentric shape.On Brake pipe 15, except its two end part, sky is opened certain intervals ground along axially, forming a plurality of slit-shaped openings 17 with type of incision in a circumferential direction.The 18th, spring tube has sufficient ductility, and is covered with opening 17 ground and is provided on the outer circumferential face of Brake pipe 15.Spring tube 18 is by fixing like this, promptly, its two end part are by the two end part outer circumferential face clamping of the two end part outer circumferential face of Brake pipe 15 and short tube 7, and bending and being enclosed on the formed annular recessed portion 21 of going up to the outside of annular convex 13,14 inwards, and, constitute its one distolaterally the pushing of upstream side by the braking annulus 23 in the space between annular convex 13 that is configured in short tube 7 and the valve block 2; The other end is being pushed by the outlet annulus 25 on the ear end face of the annular convex 14 that is installed in short tube 7 by bolt 24.
The 26th, be used for draining and the bypass valve that is provided with, be arranged on swing safety check 1 and ends valve block 2 contacted short tubes 7.The 27th, its bypass valve chamber, valve gap 28 are provided in that this is indoor, the valve rod of this valve gap of up/down perforation 30 can be provided with up or down with inserting.The disk 32 of valve port 31 switches that make bypass valve chamber 27 is installed in the underpart of valve rod 30.Valve port 31 be arranged on the intercommunicating pore 33 of braking on the annulus 23 be connected, by intercommunicating pore 33 with valve port 31 makes in the Brake pipe 15 and bypass valve chamber 27 is connected.Bypass valve 26 is not making up and longitudinally laterally but with short tube 7 sides and be provided with as shown in the figure, and disk 32 is opened valve port 31 when valve body 5 is in complete closed state, and the fluid that accumulates in the downstream side pipeline of short tube 7 is discharged.
On the annular convex 13 of short tube 7, form intercommunicating pore 35, bypass valve chamber 27 and annulus 16 are communicated with the parallel axes of short tube 7 ground; With this intercommunicating pore facing to a side also with the parallel axes of short tube 7 and be vertically formed intercommunicating pore 36.On intercommunicating pore 36 and the valve block 2, the intercommunicating pore 37 of oblique formation is connected, thereby be connected with the stream 3 of valve body upstream side, this intercommunicating pore is stream 3 centers towards the valve body upstream side.Above-mentioned intercommunicating pore 35,36,37 and bypass valve chamber 27 have formed the stream that annulus 16 is communicated with the stream 3 of valve body upstream side.
On the lateral port beyond the part that is communicated with intercommunicating pore 37 of intercommunicating pore 36, stopper 38,39 is installed and is closing.41, the 42,43, the 44th, the O circle; The 45th, cap; The 46th, operating grip; The 47th, nut; The 48th, indicator; The 49th, the bolt-inserting hole that short tube 7 and valve block 2 are fastened; The 50th, the bolt-inserting hole that short tube 7 and outlet annulus 25 are fastened; The 51st, bolt-inserting hole, be used for be arranged on short tube 7 on flange 52 on set figure do not have the pipeline of expression to be connected.
Swing safety check 1 of Gou Chenging and short tube 7 use for being arranged on the pipeline as described above, and this pipeline is to set the pump that does not have expression among the figure in swing safety check 1 side.And, when using usually, under complete closed state shown in Figure 1, when the fluid of stamping by said pump during in proper flow, valve body 5 be subjected to the effect of this hydrodynamic pressure and overcome the elastic force of spring 10, be that rotate at the center with valve shaft 6, make upstream side open certain aperture, make fluid flow to the downstream side thus from upstream side.At this moment, a part in the upstream side fluid flows to annulus 16 through intercommunicating pore 37,36, bypass valve chamber 27, intercommunicating pore 35, is full of this space by fluid.
When stopping to flow or for a certain reason adverse current takes place, valve body 5 is rotated round about by the elastic force effect of spring 10, under closed state fully, valve body 5 contacts with valve seat 11, thus with stream 3 obturations.When this valve cuts out, a part of carrying out in the fluid of adverse current enters in the annulus 16, spring tube 18 expanded to annulus 16 sides from the opening 17 of Brake pipe as shown in figure, influenced by this, make the fluid that is in the annulus 16 flow to the stream 3 of valve body upstream side through intercommunicating pore 35, bypass valve chamber 27, intercommunicating pore 36,37.Therefore the water slug phenomenon that can avoid effectively causing, can prevent water slug by rapid countercurrent pressure.
Promptly, above-mentioned structure is to utilize spring tube 18 to expand and suppressed to be formed by adverse current the hydraulic pressure of moment and risen to annulus 16 sides, its result rises the hydraulic pressure (hydraulic pressure in downstream side) of spring tube 18 inboards and becomes slow, thereby can prevent the generation of water slug.Because when spring tube 18 expands, the pump that will be in upstream side shuts down, make the pressure decline of upstream side and become and approach barometric pressure, in this simultaneously downstream side then because valve body 5 is closed, flow volume exists in the stream and that pressure is become is also higher than upstream side, thereby the fluid that is in the annulus 16 flows to the stream 3 of upstream side from intercommunicating pore 35, bypass valve chamber 27, intercommunicating pore 36,37, can not influence the expansion of spring tube 18, so spring tube 18 can not expand excessively yet.
Owing to spring tube 18 and the Brake pipe 15 with opening 17 are arranged on the downstream side, thereby can also prevent the fluctuation of members such as pump effectively.Even that is to say by the pump that is in upstream side to produce fluctuation, owing to the opening 17 of this fluctuation by Brake pipe 15, be attenuated along transmission with the mobile direction that intersects vertically of fluid.In addition, arrive spring tube 18 inboards the annulus 16 that fluctuation is decayed by the elastic force effect of spring tube 18, this fluctuation is delivered to spring tube 18 outsides fluid and decay.Owing to be provided with aforesaid Brake pipe 15, spring tube 18, intercommunicating pore 35, bypass valve chamber 27, the intercommunicating pore 36,37 that is provided with opening 17, thereby also have the function that can prevent to take place the baffler of fluctuation by fluid.
As mentioned above, when cut-off valve, be to absorb by acting on that the caused pressure of rapid countercurrent pressure on the valve body 5 rises by the expansion of spring tube 18.And, fluids in the annulus 16 that is formed by the expansion of this spring tube 18 can be by intercommunicating pore 35, bypass valve chamber 27, intercommunicating pore 36,37 effect and flow to the stream of upstream side, this discharging mechanism can utilize a part of mechanism of the bypass valve 26 that draining uses, by the intercommunicating pore 35 that between valve block 2 and short tube 7, forms, 36,37 and bypass valve chamber 27 and realizing, such measure before needn't adopting, for example on valve body, offer little valve opening or the little valve body that this little valve opening is carried out switch is set, perhaps bypass line etc. is set, can forms simple structure with method for distinguishing, cost of equipment is reduced.
Above-mentioned mode of execution is only represented the example of the best of the present invention, and the present invention is not limited to this mode of execution, can also adopt other mode when implementing.For example, need not swing safety check, so long as safety check, all styles can both be suitable for.And, in the present embodiment, adopt horizontal style as shown in the figure, also can adopt vertical modes with its direction change 90 degree.In addition, the change of the design object of detail section also can at random be replaced into the mechanism that other has same effect.
Claims (6)
1. locking apparatus is prevented in the water slug of safety check, and it is provided with: the valve block with stream; The hollow short pipe of the both ends open that the stream of one end opening portion and this valve block sets communicatively; On above-mentioned valve block, valve body can be set the switch stream, and setting above-mentioned valve body bullet to the resilient member that closes the valve direction, it is characterized in that, in above-mentioned short tube, the Brake pipe of both ends open be adapted to and short tube between form annulus, on this Brake pipe, be formed with opening, and cover this opening and on outer circumferential face, setting spring tube like that, forming between short tube and valve block makes above-mentioned annulus be communicated with the stream of valve body upstream side, when fluid countercurrent current, to wherein a part of fluid, spring tube is taken in the annulus from opening to the annulus side with expanding, and the path that a part of fluid in the annulus is circulated to valve body upstream side stream.
2. the anti-locking apparatus of the water slug of safety check as claimed in claim 1 is characterized in that, above-mentioned opening is to open certain intervals and be a plurality of slit-shaped of axially forming along pipe along the circumferencial direction sky of Brake pipe.
3. locking apparatus is prevented in the water slug of safety check as claimed in claim 1, it is characterized in that, above-mentioned spring tube be two ends by the two end part outer circumferential face of the two end part outer circumferential face of Brake pipe and short tube clamp and also be bending inwardly, one distolateral by Brake pipe push down, the other end is pushed down by the outlet annulus and fixing.
4. locking apparatus is prevented in the water slug of safety check as claimed in claim 2, it is characterized in that, above-mentioned spring tube be two ends by the two end part outer circumferential face of the two end part outer circumferential face of Brake pipe and short tube clamp and also be bending inwardly, one distolateral by Brake pipe push down, the other end is pushed down by the outlet annulus and fixing.
5. as the anti-locking apparatus of the water slug of any described safety check in the claim 1～4, it is characterized in that, the stream of above-mentioned connection by the bypass valve chamber on the short tube that is formed on the valve body side, make intercommunicating pore that this bypass valve chamber and annulus be communicated with, intercommunicating pore that the stream that makes above-mentioned valve chamber and valve body upstream side is communicated with constitutes.
6. the anti-locking apparatus of the water slug of safety check as claimed in claim 5 is characterized in that, the intercommunicating pore that above-mentioned bypass valve chamber and annulus are communicated with is the axis almost parallel ground formation with short tube; The intercommunicating pore that the stream of bypass valve chamber and valve body upstream side is communicated with is that the stream to the valve body upstream side is formed obliquely.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100458355A CN100404938C (en) | 2004-05-20 | 2004-05-20 | Water hammer prevention device for check valve |
| HK06104531A HK1084435A1 (en) | 2004-05-20 | 2006-04-13 | Water-hammer preventing unit for check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100458355A CN100404938C (en) | 2004-05-20 | 2004-05-20 | Water hammer prevention device for check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1699811A CN1699811A (en) | 2005-11-23 |
| CN100404938C true CN100404938C (en) | 2008-07-23 |
Family
ID=35476001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100458355A Expired - Lifetime CN100404938C (en) | 2004-05-20 | 2004-05-20 | Water hammer prevention device for check valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100404938C (en) |
| HK (1) | HK1084435A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470838A (en) * | 2012-06-05 | 2013-12-25 | 濮阳市信宇石油机械化工有限公司 | Simple pressure reducing valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4186775A (en) * | 1975-10-07 | 1980-02-05 | Tozen Sangyo Co., Ltd. | Water hammer shock absorber |
| JPH07145870A (en) * | 1993-11-25 | 1995-06-06 | Kawasaki Masami | Self-closing type check valve with built-in spring |
| JPH0960779A (en) * | 1995-08-21 | 1997-03-04 | Hashimoto Sangyo Kk | Flexible joint with check valve function |
| JPH1019145A (en) * | 1996-06-28 | 1998-01-23 | Tokyo Electric Power Co Inc:The | Swing type check valve |
| CN1046799C (en) * | 1994-01-31 | 1999-11-24 | 株式会社横田制作所 | Compound action type non-water hammering check valve device |
| JP2000240846A (en) * | 1999-02-23 | 2000-09-08 | Kubota Corp | Air valve |
| JP2000249240A (en) * | 1999-03-03 | 2000-09-12 | Yokota Seisakusho:Kk | Bypass gradually closing type check valve device |
-
2004
- 2004-05-20 CN CNB2004100458355A patent/CN100404938C/en not_active Expired - Lifetime
-
2006
- 2006-04-13 HK HK06104531A patent/HK1084435A1/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4186775A (en) * | 1975-10-07 | 1980-02-05 | Tozen Sangyo Co., Ltd. | Water hammer shock absorber |
| JPH07145870A (en) * | 1993-11-25 | 1995-06-06 | Kawasaki Masami | Self-closing type check valve with built-in spring |
| CN1046799C (en) * | 1994-01-31 | 1999-11-24 | 株式会社横田制作所 | Compound action type non-water hammering check valve device |
| JPH0960779A (en) * | 1995-08-21 | 1997-03-04 | Hashimoto Sangyo Kk | Flexible joint with check valve function |
| JPH1019145A (en) * | 1996-06-28 | 1998-01-23 | Tokyo Electric Power Co Inc:The | Swing type check valve |
| JP2000240846A (en) * | 1999-02-23 | 2000-09-08 | Kubota Corp | Air valve |
| JP2000249240A (en) * | 1999-03-03 | 2000-09-12 | Yokota Seisakusho:Kk | Bypass gradually closing type check valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1084435A1 (en) | 2006-07-28 |
| CN1699811A (en) | 2005-11-23 |
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