GB2287085A - Non-return valve - Google Patents
Non-return valve Download PDFInfo
- Publication number
- GB2287085A GB2287085A GB9404269A GB9404269A GB2287085A GB 2287085 A GB2287085 A GB 2287085A GB 9404269 A GB9404269 A GB 9404269A GB 9404269 A GB9404269 A GB 9404269A GB 2287085 A GB2287085 A GB 2287085A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- fluid
- ball
- fluid inlet
- cylindrical
- Prior art date
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims abstract description 69
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract description 3
- 239000012267 brine Substances 0.000 description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Check Valves (AREA)
Abstract
A non-return, valve, in particular for use in pumping and dosing apparatus in the food-processing industry, comprises a valve chamber (1) having a fluid inlet (5) and a fluid outlet (7). A guide (8) is fixedly disposed within the chamber (1) and permits movement of a valve closure member (9) between a valve closing position in which the closure member (9) sealingly engages the inlet (5) and a valve opened position in which the closure member (9) is displaced from the inlet (5). The guide (8) includes an abutment (81) which carries a plastics cushion (10) for limiting movement of the closure member (9) away from the inlet (5). <IMAGE>
Description
Title - Valve
This invention relates to a stop valve, in particular to a stop valve suitable for applications in which the valve is repeatedly opened and shut.
In many applications, fluids are dosed into receptacles. An example is the food-processing industry in which aliquots of liquid, for instance brine, are dosed into cans of, say, soup or vegetables. The pumping and dosing apparatus used normally incorporates a stop valve. Such a stop valve conventionally comprises a valve member which is urged into engagement with a valve seat by a compression spring. The valve is opened by the pressure of fluid acting on the valve member, against the action of the spring, when the pump is actuated.
Known valves of this type suffer from a number of disadvantages. The valve member is subject to considerable wear, and may become misaligned. This results in the valve becoming ineffective.
There has now been devised an improved form of mechanical stop valve which overcomes or substantially mitigates the abovementioned disadvantages.
According to the invention, there is provided a valve comprising a valve chamber having a fluid inlet and a fluid outlet formed therein, on a fluid flow axis, guide means fixedly disposed within said chamber so as to define a fluid flow path between the wall of said chamber and said guide means, said guide means permitting movement of a valve closure member along said fluid flow axis between a valve closing position in which said valve closure member sealingly engages said fluid inlet and a valve-opened position in which said valve closure member is displaced from said fluid inlet and said fluid inlet and said fluid outlet are in fluid communication along said fluid flow path.
The valve according to the invention is advantageous primarily in that it is of relatively simple construction, and is reliable in use.
The valve chamber is preferably generally cylindrical, the fluid inlet and fluid outlet being located, normally centrally, in the end faces of the cylinder.
The valve closure member is preferably a ball, and the guide means is preferably a cylindrical tube of internal diameter slightly greater than the diameter of the ball. The cylindrical tube preferably depends from the end of the valve chamber which includes the fluid outlet, and preferably terminates a short distance (less than the diameter of the ball) above the fluid inlet.
The cylindrical tube preferably includes an internal rib or other projection to limit displacement of the ball from the fluid inlet. Upstream of the rib or other projection, the cylindrical tube is preferably provided with one or more apertures, eg slots, which permit flow of fluid to the fluid outlet. The fluid flow path thus comprises the spacing between the fluid inlet and the cylindrical tube, the space between the cylindrical tube and the wall of the chamber, and the apertures in the cylindrical tube.
The fluid inlet (which constitutes the valve seat) is preferably provided with a valve seal of plastics material.
This improves the effectiveness of the seal between the ball and the fluid inlet, and also reduces or eliminates the sound generated by engagement of the ball with the fluid inlet.
Likewise, the rib or other projection which limits displacement of the ball is preferably provided with a plastics cushion. In use, the ball thus reciprocates between engagement with the plastics valve seal and the plastics cushion, and is virtually silent in operation.
The plastics valve seal preferably provided on the fluid inlet, and the plastics cushion preferably provided on the displacement-limiting projection within the cylindrical guide tube, both preferably have a simple clip fitting.
According to a particularly preferred aspect of the invention, there is thus provided a valve comprising a generally cylindrical chamber, a fluid inlet and a fluid outlet being formed coaxially in respective opposite first and second end faces thereof, a cylindrical guide tube depending from said second end face, said cylindrical guide tube enclosing a freely moveable ball, the cylindrical guide tube terminating a distance less than the diameter of the ball from the first end face and being provided with an annular internal rib such that the ball may reciprocate freely between the fluid inlet and the annular internal rib, and the cylindrical guide tube being provided, upstream of said annular internal rib, with one or more apertures such that, in use, fluid may flow from the fluid inlet, externally of the cylindrical guide tube and through said apertures to said fluid outlet.
As explained above, the fluid inlet and the annular rib are each preferably provided with a plastics seal or cushion.
The invention will now be described in greater detail, by way of illustration only, with reference to the accompanying drawings, in which
Figure 1 is a sectional side view of a valve according to the invention; and
Figure 2 is a sectional view along line II-II in Figure 1.
Referring to Figure 1, a valve for use in a brine pumping and dosing apparatus for food-processing applications comprises a cylindrical chamber 1. A circular base plate 2 has an interference fit with one end of the chamber 2. In use, the valve is held fixedly between surrounding components (not shown) and the interference fit between the chamber 1 and base plate 2 is sufficient. In other applications other means may be provided for ensuring secure connection of the base plate to the chamber. The opposite end of the chamber 1 is closed by a top plate 3 which is secured by means of a circlip 4.
A fluid inlet 5 is formed centrally in the base plate 2. The fluid inlet receives a valve seal 6 of machined PTFE which defines the valve seat. The seal 6 is held in place by a circumferential rib 61 which locates in a corresponding groove provided in the wall of the fluid inlet 5.
A fluid outlet 7 is formed centrally in the top plate 3.
Depending downwardly from the outlet 7, and formed integrally with the top plate 3 is a cylindrical guide 8. The lower end of the guide 8 surrounds a ball 9 and the guide 8 is provided with an internal annular rib 81 to which is fitted a cushion 10, again of machined PTFE. The ball 9 is thus free to move along the longitudinal axis of the chamber 1 between a valve closing position (shown by the solid outline in
Figure 1) in which the ball 9 engages the seal 6 and a valveopen position (shown by the broken outline in Figure 1) in which the ball 9 is displaced upwards.
The guide 8 is provided, at a position between the outlet 7 and the cushion 10, with three arcuate slots 82 (see
Figure 2), each of which extends through approximately 80" of arc.
In use, the ball 9 reciprocates between the two positions shown in Figure 1. With the ball 9 initially in the valve closing position (solid line), when a pump (not shown) upstream of the valve is actuated the pressure of fluid on the ball 9 then the ball 9 is displaced into the valve-open position (broken line). Fluid flows through the inlet 5, around the outside of the guide 8, and through the slots 82 to the outlet 7. The lower edge of the guide 8 is rounded to prevent or reduce turbulence in the flow of fluid past it.
When the pressure of fluid is released, the ball 9 returns to the solid line position in Figure 1. This return is effected under the influence of gravity, and is assisted by any back pressure in the system which is applied to the ball 9 through a central bore 101 in the cushion 10.
The seal 6 and the cushion 10 reduce or eliminate the sound of the ball 9 impacting at each end of its travel. The valve is thus virtually silent in operation.
A further important advantage of the valve according to the invention is that it is self-priming. By this is meant that in an apparatus in which the brine header tank is positioned higher than the valve, when the pump is switched off the pressure of brine caused by gravity is sufficient to lift the ball 9 off the seal 6 sufficiently for the chamber 1 to charge with fluid. This is in contrast to known forms of stop valve in which the compression spring does not permit such charging of the valve chamber. The consequence of this is that, after a period of inoperation, eg overnight, the valve must be primed in a separate operation before normal use can resume.
Claims (11)
1. A valve comprising a valve chamber having a fluid inlet and a fluid outlet formed therein, on a fluid flow axis, guide means fixedly disposed within said chamber so as to define a fluid flow path between the wall of said chamber and said guide means, said guide means permitting movement of a valve closure member along said fluid flow axis between a valve closing position in which said valve closure member sealingly engages said fluid inlet and a valve-opened position in which said valve closure member is displaced from said fluid inlet and said fluid inlet and said fluid outlet are in fluid communication along said fluid flow path.
2. A valve as claimed in Claim 1, wherein the valve chamber is generally cylindrical, the fluid inlet and fluid outlet being located in the end faces of the cylinder.
3. A valve as claimed in Claim 1 or Claim 2, wherein the valve closure member is a ball.
4. A valve as claimed in Claim 3, wherein the guide means is a cylindrical tube of internal diameter slightly greater than the diameter of the ball.
5. A valve as claimed in Claim 4, wherein the cylindrical tube depends from the end of the valve chamber which includes the fluid outlet, and terminates a distance less than the diameter of the ball above the fluid inlet.
6. A valve as claimed in Claim 4 or Claim 5, wherein the cylindrical tube includes an internal rib or other projection to limit displacement of the ball from the fluid inlet.
7. A valve as claimed in any one of Claims 4 to 6, wherein the cylindrical tube is provided, upstream of the rib or other projection, with one or more apertures which permit flow of fluid to the fluid outlet.
8. A valve as claimed in any preceding claim, wherein the fluid inlet is provided with a valve seal of plastics material.
9. A valve as claimed in Claim 6, wherein the rib or other projection which limits displacement of the ball is provided with a plastics cushion.
10. A valve as claimed in Claim 1, comprising a generally cylindrical chamber, a fluid inlet and a fluid outlet being formed coaxially in respective opposite first and second end faces thereof, a cylindrical guide tube depending from said second end face, said cylindrical guide tube enclosing a freely moveable ball, the cylindrical guide tube terminating a distance less than the diameter of the ball from the first end face and being provided with an annular internal rib such that the ball may reciprocate freely between the fluid inlet and the annular internal rib, and the cylindrical guide tube being provided, upstream of said annular internal rib, with one or more apertures such that, in use, fluid may flow from the fluid inlet, externally of the cylindrical guide tube and through said apertures to said fluid outlet.
11. A valve substantially as hereinbefore described and as illustrated in the accompanying figures.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9404269A GB2287085A (en) | 1994-03-05 | 1994-03-05 | Non-return valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9404269A GB2287085A (en) | 1994-03-05 | 1994-03-05 | Non-return valve |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9404269D0 GB9404269D0 (en) | 1994-04-20 |
GB2287085A true GB2287085A (en) | 1995-09-06 |
Family
ID=10751351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9404269A Withdrawn GB2287085A (en) | 1994-03-05 | 1994-03-05 | Non-return valve |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2287085A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007057255A1 (en) * | 2005-11-21 | 2007-05-24 | Robert Bosch Gmbh | Non-return valve and injector having a hydraulic transformer |
WO2008087051A1 (en) * | 2007-01-17 | 2008-07-24 | Robert Bosch Gmbh | Non-return valve and injector with hydraulic booster and non-return valve |
EP2390541A1 (en) | 2010-05-28 | 2011-11-30 | DEBEM S.r.l. | Ball valve device and method for forming a ball retainer in a check valve |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108547983A (en) * | 2018-06-01 | 2018-09-18 | 林树新 | A kind of New Mine automobile tyre air charging connector |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB739930A (en) * | 1953-02-03 | 1955-11-02 | Gratzmuller Jean Louis | Non-return ball valve for reciprocating hydraulic pumps |
GB870631A (en) * | 1958-01-17 | 1961-06-14 | Hobourn Eaton Mfg Co Ltd | Improvements relating to fluid pressure relief valves |
GB1120505A (en) * | 1965-11-30 | 1968-07-17 | Alkon Products Corp | Improvements in check valve mechanism |
US4409959A (en) * | 1981-04-30 | 1983-10-18 | Chevron Research Company | Solar energy water preheat system |
US4448212A (en) * | 1981-05-14 | 1984-05-15 | Sterling Drug Inc. | Check valve for use with high pressure pump |
US5178184A (en) * | 1991-08-12 | 1993-01-12 | Skillman Milton M | Pump valve apparatus |
-
1994
- 1994-03-05 GB GB9404269A patent/GB2287085A/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB739930A (en) * | 1953-02-03 | 1955-11-02 | Gratzmuller Jean Louis | Non-return ball valve for reciprocating hydraulic pumps |
GB870631A (en) * | 1958-01-17 | 1961-06-14 | Hobourn Eaton Mfg Co Ltd | Improvements relating to fluid pressure relief valves |
GB1120505A (en) * | 1965-11-30 | 1968-07-17 | Alkon Products Corp | Improvements in check valve mechanism |
US4409959A (en) * | 1981-04-30 | 1983-10-18 | Chevron Research Company | Solar energy water preheat system |
US4448212A (en) * | 1981-05-14 | 1984-05-15 | Sterling Drug Inc. | Check valve for use with high pressure pump |
US5178184A (en) * | 1991-08-12 | 1993-01-12 | Skillman Milton M | Pump valve apparatus |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007057255A1 (en) * | 2005-11-21 | 2007-05-24 | Robert Bosch Gmbh | Non-return valve and injector having a hydraulic transformer |
WO2008087051A1 (en) * | 2007-01-17 | 2008-07-24 | Robert Bosch Gmbh | Non-return valve and injector with hydraulic booster and non-return valve |
US7789069B2 (en) | 2007-01-17 | 2010-09-07 | Robert Bosch Gmbh | Check valve, and injector with hydraulic booster and check valve |
EP2390541A1 (en) | 2010-05-28 | 2011-11-30 | DEBEM S.r.l. | Ball valve device and method for forming a ball retainer in a check valve |
Also Published As
Publication number | Publication date |
---|---|
GB9404269D0 (en) | 1994-04-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |