CN101495757B - Fill port for a self-priming centrifugal pump, with safety device - Google Patents
Fill port for a self-priming centrifugal pump, with safety device Download PDFInfo
- Publication number
- CN101495757B CN101495757B CN2006800354669A CN200680035466A CN101495757B CN 101495757 B CN101495757 B CN 101495757B CN 2006800354669 A CN2006800354669 A CN 2006800354669A CN 200680035466 A CN200680035466 A CN 200680035466A CN 101495757 B CN101495757 B CN 101495757B
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- CN
- China
- Prior art keywords
- filler
- pump
- lid
- retaining clip
- self
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A safety cover for the fill port of a self-primer pump is structured to improve the seal between the fill port cover and the fill port in the pump casing to thereby control the release of steam from the pump, and includes an improved sealing band between the fill port and fill port cover, an improved fill port cover design and an improved retaining clamp design.
Description
The cross reference of related application
The application is a non-provisional application, enjoys the preference of the temporary patent application No.60/707097 that submitted on August 10th, 2005.
Technical field
The present invention relates to a kind of self-priming centrifugal pump, particularly relate to a kind of filler assembly with improved safeguard construction.
Background technique
Self-priming centrifugal pump is well-known, usually is used for the industry that need handle the fluid that contains (entrained) solid.Self-priming pump also is known as transh pump, it is characterized in that having a housing, is holding suction chamber in it and by wall or the separated separation chamber of plenum.The impeller that is arranged in the spiral section of pump receives fluid from suction chamber, and by centrifugal action fluid is sent to the separation chamber, in the separation chamber fluid is discharged from outlet at last.
In the working procedure of self-priming pump, fluid enters into the suction chamber of pump by inlet.Safety check is configured to abut against inlet, thereby when pump work, safety check stays open; But when pump quits work, safety check will abut against inlet in case the fluid stopping body flows out from the suction chamber of pump.If safety check stays open or be not positioned to and abut against inlet just, fluid is interrupted up to siphonage or siphon leg in will being entered the room by the siphon resorption.Therefore, the fluid level in the suction chamber is very low, makes once more pump inhale very difficulty.Therefore, need guarantee that fluid remains in the suction chamber.
Self-priming pump is usually configured to this fluid is remained in the pump so that starting filling once more when needed.But a lot of reasons all might cause low fluid level, comprises fluid inverted-siphon from pump.If fluid level is low excessively, pump will can not start (that is, by suction pipe fluid being pumped in the pump), and the pump-absorb action of pump will become steam with the water that is present in the pump.
Usually self-priming pump is configured to have filler, and it generally is positioned near the pump case or the top of pump case, so just can allow fluid is added in the pump.But the inside that enters into pump by filler is quite dangerous, particularly when pump can not start and pump in water when becoming steam.Usually because steam can spill from filler, the lid of therefore dismantling filler will cause being badly damaged.Therefore, attempted to develop a kind of lid of safe filler to reduce contingency and infringement.Although live through these effort, because the design problem of this safety head causes still continuing to occur many infringements.
Therefore, advantageously provide at present a kind of lid of the safe filler that is used for self-priming pump, damage and make the steam accidental exposure that is present in the pump under described condition preventing.
Summary of the invention
According to the present invention, a kind of safety head that is used for the filler of self-priming pump is provided, it has improved the sealing between the filler in filler lid and the pump case, and has guaranteed when released vapour from pump filler lid to be fixed on the filler, thereby can avoid infringement.
Filler lid of the present invention and safety installations generally include lid, the retaining clip of the filler of canned pump and be arranged on retaining clip and filler lid between anchor bolt, these all are well-known traditionally.But filler lid of the present invention is configured to have the depression that is used for holding the anchor bolt end, to guarantee when the appropriate position that filler lid is remained on during released vapour from pump case under certain pressure above the filler.
This safety installations also comprises the seal band that is arranged between filler and the filling oil cover.Seal band can be configured to O shape ring, and it makes the steam that discharges from filler be improved.Optimum ground, O shape ring can be teflon coated
, or handle in addition or make by the material that for seal band, has inadhesion character.
The retaining clip of safety installations of the present invention also is formed at its two ends and has groove or depression, and the head with fillister head screw when being connected with pump case with convenient retaining clip is received in the retaining clip.The head of screw in described depression clamping, and prevents that retaining clip and screw or filler lid from unclamping.
Three safety elements of the present invention can use jointly or use with various compound modes, so that make the filler lid that is provided be configured to guarantee with the speed more controlled than existing system steam to be discharged from pump.Described safety element also guaranteed when from pump, discharging high pressure steam, to make filler lid do not blown off pump case filler or suffer damage.
Description of drawings
In the accompanying drawings, show to be commonly referred to be and implement optimal mode of the present invention:
Fig. 1 is the upper view of prior art self-priming pump, there is shown filler, and the decomposition view of the filler lid of traditional existing pump;
Fig. 2 is the view of filler lid shown in Figure 1 when being set at appropriate position on the filler;
Fig. 3 is the planimetric map of filler shown in Figure 2;
Fig. 4 is the view on a self-priming pump top, shows the decomposition view of filler of the present invention and safety installations;
Fig. 5 is the view of filler of the present invention and safety installations when safety head is set at appropriate position on the filler; With
Fig. 6 is the filler cut open along Fig. 5 center line 6-6 and the viewgraph of cross-section of safety installations.
Embodiment
By with filler lid traditional shown in Fig. 1-3 to filler safety installations of the present invention recently is described best.Especially, Fig. 1 shows the top of pump case 10, and it has near the filler 12 that is arranged on the pump discharge 14.The closed cap 16 of existing filler 12 comprises a smooth packing ring 18, and the opening of its size and filler 12 mates substantially, and is kept going up in position by filler lid 20.One retaining clip 22 is arranged on the filler lid 20, and is threadedly connected to tapped hole 28,30 and is fixed on the pump case 10 by square head bolt 24,26, and the tapped hole 28,30 in the pump case 10 described here lays respectively at filler 12 both sides.This retaining clip 22 is formed at its two ends and has U-shaped opening 32,33 respectively, in order to receive bolt 24,26.
One L shaped anchor bolt 34 passes center hole 36 and is threaded in the retaining clip 22.Preferably as shown in Figure 2, there is shown filler lid 20 and be fixed on the position of sealing filler 12, the terminal 38 of anchor bolt 34 is aimed at the end face 40 that abuts against filler lid 20.Fastening the making that abuts against the anchor bolt 34 of filler lid 20 forms pressure to guarantee filler 12 water-stop on every side on smooth packing ring 18.
Further as shown in Figure 3, in existing fill port systems, realize the fixing of retaining clip 22, thereby between the outermost corner of two bolt 24,26 heads, have the distance D of a maximum by fastening square head bolt 24,26.Therefore, existing retaining clip 22 is formed at the shoulder 42,44 that the terminal of its U-shaped opening 32,33 has a projection respectively.The shoulder 42,44 of described projection may prevent that retaining clip 22 from unclamping from the bottom of bolt 24,26 heads, unclamps about 1/8 inch up to anchor bolt 34.But, should be noted that the fastening needs of bolt 24,26 screw bottom back-out separately the tapped hole 28,30 of bolt 24,26 up to them in existing pump, this just causes square head not to be adjusted to ultimate range D.Further regulate bolt 24,26 and will cause each the screw thread fracture in the bolt to realize suitable distance D, and/or be to produce overvoltage on shoulder 42,44, this will cause potential seepage.
The element of above-mentioned existing fill port closure 16 trends towards filler lid 20 is kept going up in position, and prevents to exist in pump the harm that steam discharges from filler 20 under the situation of steam.In operating process, unclamp (promptly 1/8 inch) anchor bolt 34 a little and discharge to allow filler lid 20 to open all steam that to come from filler 12 a little.But, observed existing plain washer 18 and made more steam to discharge from filler 12.The result is when filler lid 20 unclamps, and the steam release pressure that passes the space between packing ring and the filler lid 20 causes filler lid 20 to be abandoned and away from filler 12, thereby causes suffering damage.
Therefore, although the shoulder 42 on the retaining clip 22,44 heads that trend towards contacting bolt 24,26 to be preventing unclamping of retaining clip 22, but have been found that unclamping anchor bolt 34 not only causes retaining clip 22 rotations, and cause retaining clip 22 to tilt, this is enough to make wherein, and at least one bolt 24,26 unclamps with its shoulder 42,44 separately, the danger that causes retaining clip 22 and bolt 24,26 to unclamp.Retaining clip 22 is unclamped by this way and is also caused under the situation that vapor pressure increases the deserted of filler lid 20 to be unclamped.
In filler lid of the present invention and safety installations, shown in Fig. 4-6, solve these problems by multiple structural change.At first, the present invention has adopted seal band 48, and it is configured to control better the release of steam from filler.Preferably is, seal band 48 is O shape rings 50, and it is set at around the filler 12, and is kept going up in position by filler lid 52.The verified flat washer than available technology adopting, O shape ring seal band 50 utilize the pressure demand that has reduced to provide more comprehensively water-stop.
O shape ring 50 can also be handled or be made by the material that has non-adhesiveness matter for seal band 48 coated or in addition, for example polytetrafluoroethylene
(Teflon
).The structure of seal band 48 and inadhesion characteristic discharge steam and provide better control, thereby when unclamping filler lid 52 a little, all steam that are present in the pump will discharge with more stable flow velocity and distribution, reduce impaired possibility whereby.
Secondly, filler lid 52 of the present invention has and is formed on the depression 54 of covering 52 end faces 56, in order to the terminal 58 of holding anchor bolt 60.As shown in Figure 6, when anchor bolt 60 passed through the center hole 64 of retaining clip 62, the terminal 58 of anchor bolt 60 was positioned in the depression 54 of filler 52.This layout has guaranteed that when anchor bolt 60 unclamps filler lid 52 still remains on the filler 12 and abuts against seal band 48, and this is because the depression 54 of filler lid 52 can not be removed the terminal 58 of (clear) anchor bolt 60.Therefore, prevented that filler lid 52 from being blown off by filler 12 when steam spills under pressure.Anchor bolt 60 is positioned at also have been guaranteed in the depression 54 of filler lid 52 and can apply bigger pressure to O shape ring 50 by filler lid 52.
In retaining clip 62 of the present invention, use fillister head screw 66,68 that retaining clip 62 is connected on the pump case 10.Preferably as shown in Figure 6, retaining clip 62 has depression 70,72 at its two ends, and the head 74,76 of fillister head screw 66,68 is assemblied in the described depression.This design feature has guaranteed that when unclamping anchor bolt 60 retaining clip 62 can or not unclamped from disengaging on the fillister head screw 66,68, and this is because screw 66,68 heads 74,76 are placed in and make retaining clip 62 can't rotate or slight inclination in the depression.In addition, this design feature has guaranteed that retaining clip 62 can not break away from or not unclamp from fillister head screw, removes from the bottom of screw 66,68 heads up to the top 78 of retaining clip 62.
The structural element of the improved filler lid of the present invention and safety installations all guaranteed effectively when steam when filler discharges, filler lid 52 still remains on the appropriate position on the filler.Can adopt any improved structural element described here separately, comprise improved seal band 48, have the filler lid 52 and improved retaining clip 62 structures of depression 54, thereby perhaps make above-mentioned improved structural element and other combination of structural elements use the Safety performance of improving self-priming pump.Can introduce or adopt element structure of the present invention or structural change filler lid and safety installations to adapt to specific needs or occasion.Therefore, the specific detail of the filler lid element that has safety installations of institute's reference here is only as embodiment, rather than the conduct restriction.
Claims (5)
1. filler security component that is used for self-priming pump comprises:
Be placed in the filler lid on the filler of self-priming pump, described filler lid has the depression that is formed in its top;
Against the seal band of described filler lid, wherein, described seal band is an O shape ring;
Be arranged on the retaining clip on the described filler lid, it is in order to be fixed to described filler lid on the filler; And
Pass the anchor bolt that described retaining clip is provided with, described anchor bolt has the interior terminal of described depression that its size can be received into described filler lid.
2. filler security component according to claim 1, wherein said O shape ring has the inadhesion characteristic.
3. filler security component according to claim 2, wherein said O shape ring is coated with special fluorine
4. filler security component according to claim 1, wherein said retaining clip have two ends and are formed with depression in its each end, in order to hold the head of tap bolt.
5. filler security component according to claim 4, wherein said O shape ring has the inadhesion characteristic.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70709705P | 2005-08-10 | 2005-08-10 | |
| US60/707,097 | 2005-08-10 | ||
| US11/501,326 | 2006-08-09 | ||
| US11/501,326 US20070071619A1 (en) | 2005-08-10 | 2006-08-09 | Fill port for a self-priming centrifugal pump, with safety device |
| PCT/US2006/031205 WO2007021845A2 (en) | 2005-08-10 | 2006-08-10 | Fill port for a self-priming centrifugal pump, with safety device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100871757A Division CN102155427B (en) | 2005-08-10 | 2006-08-10 | Fill port for a self-priming centrifugal pump, with safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101495757A CN101495757A (en) | 2009-07-29 |
| CN101495757B true CN101495757B (en) | 2011-06-01 |
Family
ID=40925408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800354669A Expired - Fee Related CN101495757B (en) | 2005-08-10 | 2006-08-10 | Fill port for a self-priming centrifugal pump, with safety device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101495757B (en) |
| ZA (1) | ZA200801325B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3302664A (en) * | 1964-04-07 | 1967-02-07 | Coleman Co | Safety cap assembly for pressurized founts of gasoline burning devices |
| US4702277A (en) * | 1985-05-01 | 1987-10-27 | Veriflo Corporation | Cylinder valve-regulator |
| CN2405044Y (en) * | 1999-11-22 | 2000-11-08 | 丁正海 | Centrifugal type pump |
-
2006
- 2006-08-10 CN CN2006800354669A patent/CN101495757B/en not_active Expired - Fee Related
-
2008
- 2008-02-07 ZA ZA200801325A patent/ZA200801325B/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3302664A (en) * | 1964-04-07 | 1967-02-07 | Coleman Co | Safety cap assembly for pressurized founts of gasoline burning devices |
| US4702277A (en) * | 1985-05-01 | 1987-10-27 | Veriflo Corporation | Cylinder valve-regulator |
| CN2405044Y (en) * | 1999-11-22 | 2000-11-08 | 丁正海 | Centrifugal type pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101495757A (en) | 2009-07-29 |
| ZA200801325B (en) | 2009-08-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20130810 |