GB2104595A - Water hammer arrestor - Google Patents
Water hammer arrestor Download PDFInfo
- Publication number
- GB2104595A GB2104595A GB08222104A GB8222104A GB2104595A GB 2104595 A GB2104595 A GB 2104595A GB 08222104 A GB08222104 A GB 08222104A GB 8222104 A GB8222104 A GB 8222104A GB 2104595 A GB2104595 A GB 2104595A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- body part
- screw
- sealing
- water hammer
- 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- Withdrawn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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
- F16L55/052—Pneumatic reservoirs
- F16L55/053—Pneumatic reservoirs the gas in the reservoir being separated from the fluid in the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/21—Accumulator cushioning means using springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
- F15B2201/312—Sealings therefor, e.g. piston rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/41—Liquid ports
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pipe Accessories (AREA)
Abstract
A device for use in a water system to reduce or eliminate water hammer. So that water hammer can be reduced or eliminated in a very simple manner, the device includes a body part (10) containing a spring loaded piston (14) so that surges of pressure are at least partially absorbed thereby. The piston (14) is seated to the body (10) by a rolling diaphragm (18) or O- ring. <IMAGE>
Description
SPECIFICATION
Water hammer arrestor
The invention relates to a device for use in water systems.
It is a particular problem that in water supply systems, both domestic systems and industrial systems, the sudden closing of a tap or valve produces what is known as water hammer, that is to say an unpleasant knocking noise. This is caused by the flow of water in the system being made to come to a sudden stop. The phenomenon is not only unpleasant but damaging because the surges of energy involved can loosen joints in the water system and this in turn can cause damage to property.
The object of the invention is to provide a device whereby water hammer in water supply systems is at least partially absorbed.
According to the invention, there is provided a device for use as a water hammer arrestor in water supply systems, the device including a cylindrical body part containing a spring loaded piston, the arrangement being such that the body part can be connected into a water supply system whereby surges of pressure in the system act against the piston in opposition to the spring pressure, the surges of pressure being at least partially absorbed thereby. The device may also be provided with a sealing element capable of acting as a rolling diaphragm, the piston being a freely sliding fit in the body part.On the other hand, the piston may be provided with at least one O-ring for sealing the piston in the body part and in this case the piston may be provided with a sealing screw and washer, the arrangement being such that when the sealing screw has been slackened, air has been able to escape from beneath the
piston as the latter has been entered into the body part, re-tightening of said screw then having sealed the hole in the piston in which said screw is screwthreaded.
In order that the Invention may be fully understood and readily carried into effect, the same will now be described, by way of example only, with reference to the accompanying drawings, of which:~
Fig. 1 is a sectional view of a device embodying the invention, and
Figs. 2 and 3 are similar views of somewhat different constructions of such device.
Referring now to Fig. 1 of the drawings, the device there illustrated for use as a water hammer arrestor includes a cylindrical body part 10 one end of which is closed and the other end of which is externally screwthreaded and engaged within a screwthreaded skirt portion of an adaptor member generally indicated 12. The adaptor member is provided with a screwthreaded spigot portion 13 by means of which the device can be connected into a water system for the water pressure in the system to act within the body part.
The cylindrical body part contains a piston element 14 which is acted upon by a coiled compression spring 16. The piston is a freely .sliding fit in the body part but leakage of water past the piston is prevented by a sealing element 18 of initially "top hat" section which has a peripheral outer rim part 20 trapped by a washer 22 when the body part is united with the adaptor member 12. The arrangement is such that when the device has been connected into a water supply system, any surges of pressure which would otherwise cause water hammer are at least partially absorbed by the piston moving within the cylindrical body part. As the piston moves (and it will be understood that the amount of movement is comparatively small) the sealing element 18 is able to behave as a so-called rolling diaphragm.
Referring now to Fig. 2, the device there illustrated is of broadly similar construction to the device described above and like parts are given the same reference numerals. However, in this case, instead of being fitted with a sealing element capable of acting as a rolling diaphragm the piston element is grooved and is provided with a pair of resilient O-rings 24. In addition, so that the piston element is able to be inserted into the cylindrical body part on assembly of the device, the piston element is provided with a sealing screw 26 and washer 28, the arrangement being such that when the sealing screw has been slackened, air has been able to escape from beneath the piston as the latter has been entered into the body part. Retightening of said screw has then sealed the hole in the piston element against further leakage of air either into or from the interior of the body part.
This construction of device operates in just the same way as the previously described embodiment except that the leakage of water into the space in which the spring is disposed is prevented by the O-rings 24.
Referring now to Fig. 3, the device there illustrated is very similar in construction to that just described and like parts are again given the same reference numerals. However, the sealing screw 26 and washer 28 have been omitted. In use of the device, the air which is trapped within the body parts assists the spring 16 in resisting surges of fluid in the system in which the device is connected.
Various other modifications may be made. For example, in the device illustrated in Fig. 2 instead of the sealing screw and washer being provided in the piston element it could be provided in the top face or in the side wall of the body part for the same purpose. Furthermore, in any of the illustrated embodiments, instead of being provided with a screwthreaded spigot portion 13 by means of which it can be connected into a water system, the device may be provided with a plain spigot portion by means of which it can be connected into a water system either by a compression type fitting or by other means. Also, instead of the body part 10 having a blank top face it could be provided with a screwthreaded spigot as 13 or a plain spigot portion by means of which it could be connected to an overflow pipe.
This would be useful in case of failure of seals.
Claims (5)
1. A device for use as a water hammer arrestor in water supply systems, the device including a cylindrical body part containing a spring loaded piston, the arrangement being such that the body part can be connected into a water supply system whereby surges of pressure in the system act against the piston in opposition to the spring pressure, the surges of pressure being partially absorbed thereby.
2. A device according to claim 1, provided with a sealing element capable of acting as a rolling diaphragm, the piston being a freely sliding fit in the body part.
3. A device according to claim 1, in which the piston is provided with at least one O-ring for sealing the piston in the body part.
4. A device according to claim 3, in which the piston is provided with a sealing screw and washer, the arrangement being such that when the sealing screw has been slackened, air has been able to escape from beneath the piston as the latter has been entered into the body part, retightening of said screw then having sealed the hole in the piston in which said screw is screwthreaded.
5. A device constructed, arranged and adapted to operate substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08222104A GB2104595A (en) | 1981-08-13 | 1982-07-30 | Water hammer arrestor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8124812 | 1981-08-13 | ||
| GB08222104A GB2104595A (en) | 1981-08-13 | 1982-07-30 | Water hammer arrestor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2104595A true GB2104595A (en) | 1983-03-09 |
Family
ID=26280458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08222104A Withdrawn GB2104595A (en) | 1981-08-13 | 1982-07-30 | Water hammer arrestor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2104595A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3246338A1 (en) * | 1982-12-15 | 1984-06-20 | Robert Bosch Gmbh, 7000 Stuttgart | Piston accumulator |
| EP0890494A2 (en) * | 1996-05-30 | 1999-01-13 | Lucas Industries Public Limited Company | Accumulator |
| WO2012097414A1 (en) * | 2011-01-21 | 2012-07-26 | Fluid Kinnect Pty. Ltd. | Water hammer arrester |
| EP2485004A1 (en) * | 2011-02-04 | 2012-08-08 | Alfa Laval Corporate AB | A heat exchanger assembly and use of an apparatus in a heat exchanger assembly |
| WO2014086677A2 (en) * | 2012-12-05 | 2014-06-12 | Alfa Laval Corporate Ab | Device, method and plate heat exchanger |
| WO2017199058A1 (en) | 2016-05-19 | 2017-11-23 | BEREZNAI, Dóra | Device for reducing pressure blow |
| WO2018121913A1 (en) * | 2016-12-29 | 2018-07-05 | Robert Bosch Gmbh | Hydraulic block for a hydraulic assembly of a brake control system of a hydraulic vehicle brake system |
| WO2019123132A1 (en) * | 2017-12-19 | 2019-06-27 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Brake hydraulic pressure control device |
| US20200079183A1 (en) * | 2018-09-06 | 2020-03-12 | Denso International America, Inc. | Heat exchanger |
-
1982
- 1982-07-30 GB GB08222104A patent/GB2104595A/en not_active Withdrawn
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3246338A1 (en) * | 1982-12-15 | 1984-06-20 | Robert Bosch Gmbh, 7000 Stuttgart | Piston accumulator |
| EP0890494A2 (en) * | 1996-05-30 | 1999-01-13 | Lucas Industries Public Limited Company | Accumulator |
| EP0890494A3 (en) * | 1996-05-30 | 2002-05-02 | Lucas Industries Limited | Accumulator |
| AU2012208960B2 (en) * | 2011-01-21 | 2014-07-31 | Fluid Kinnect Pty. Ltd. | Water hammer arrester |
| WO2012097414A1 (en) * | 2011-01-21 | 2012-07-26 | Fluid Kinnect Pty. Ltd. | Water hammer arrester |
| US9228687B2 (en) | 2011-01-21 | 2016-01-05 | Fluid Kinnect Pty. Ltd. | Water hammer arrester |
| CN103339459B (en) * | 2011-02-04 | 2015-12-02 | 阿尔法拉瓦尔股份有限公司 | The use in heat exchanger of heat exchanger assembly and equipment |
| US9846001B2 (en) | 2011-02-04 | 2017-12-19 | Alfa Laval Corporate Ab | Heat exchanger assembly and use of an apparatus in a heat exchanger |
| CN103339459A (en) * | 2011-02-04 | 2013-10-02 | 阿尔法拉瓦尔股份有限公司 | A heat exchanger assembly and use of an apparatus in a heat exchanger |
| WO2012104118A1 (en) * | 2011-02-04 | 2012-08-09 | Alfa Laval Corporate Ab | A heat exchanger assembly and use of an apparatus in a heat exchanger |
| EP2485004A1 (en) * | 2011-02-04 | 2012-08-08 | Alfa Laval Corporate AB | A heat exchanger assembly and use of an apparatus in a heat exchanger assembly |
| WO2014086677A3 (en) * | 2012-12-05 | 2014-09-04 | Alfa Laval Corporate Ab | Device, method and plate heat exchanger |
| US9810490B2 (en) | 2012-12-05 | 2017-11-07 | Alfa Laval Corporate Ab | Device, method and plate heat exchanger |
| WO2014086677A2 (en) * | 2012-12-05 | 2014-06-12 | Alfa Laval Corporate Ab | Device, method and plate heat exchanger |
| WO2017199058A1 (en) | 2016-05-19 | 2017-11-23 | BEREZNAI, Dóra | Device for reducing pressure blow |
| WO2018121913A1 (en) * | 2016-12-29 | 2018-07-05 | Robert Bosch Gmbh | Hydraulic block for a hydraulic assembly of a brake control system of a hydraulic vehicle brake system |
| GB2571886A (en) * | 2016-12-29 | 2019-09-11 | Bosch Gmbh Robert | Hydraulic block for a hydraulic assembly of a brake control system of a hydraulic vehicle brake system |
| US10814848B2 (en) | 2016-12-29 | 2020-10-27 | Robert Bosch Gmbh | Hydraulic block for a hydraulic assembly of a brake control system of a hydraulic vehicle brake system |
| WO2019123132A1 (en) * | 2017-12-19 | 2019-06-27 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Brake hydraulic pressure control device |
| JPWO2019123132A1 (en) * | 2017-12-19 | 2020-11-19 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Brake fluid pressure control device |
| US20200079183A1 (en) * | 2018-09-06 | 2020-03-12 | Denso International America, Inc. | Heat exchanger |
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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) |