EP3417117A1 - Hydrantenentwässerung - Google Patents
HydrantenentwässerungInfo
- Publication number
- EP3417117A1 EP3417117A1 EP16705477.4A EP16705477A EP3417117A1 EP 3417117 A1 EP3417117 A1 EP 3417117A1 EP 16705477 A EP16705477 A EP 16705477A EP 3417117 A1 EP3417117 A1 EP 3417117A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrant
- passage
- riser
- main valve
- water
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 109
- 239000012530 fluid Substances 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 20
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 150000004677 hydrates Chemical class 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 238000013022 venting Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 description 7
- 239000003673 groundwater Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 238000003809 water extraction Methods 0.000 description 2
- 206010010774 Constipation Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B9/00—Methods or installations for drawing-off water
- E03B9/02—Hydrants; Arrangements of valves therein; Keys for hydrants
- E03B9/04—Column hydrants
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B9/00—Methods or installations for drawing-off water
- E03B9/02—Hydrants; Arrangements of valves therein; Keys for hydrants
- E03B9/14—Draining devices for hydrants
Definitions
- the present invention relates to a hydrant.
- Hydrants are connected to a water distribution system and provide a tap for the removal of water to allow the fire brigade, as well as public and private users, to extract water from the public water distribution system.
- the network pressure in the water distribution system is typically about 6 to 9 bar.
- Hydrants are generally differentiated between the upper hydrant and the lower hydrant.
- the above-ground hydrant is permanently installed above ground and has outlets with standardized couplings.
- the underfloor hydrant is installed underground and covered by a ground cover from above. Thus, the underfloor hydrant is located below the level of the floor water extraction point, which is closed by the bottom cover. Hydrants comprise a riser with an interior and an exterior, with the interior opening into the connection for water extraction.
- shut-off device which is arranged in the region of a bottom-side inlet pipe. As long as the obturator is in the closed position, the interior of the riser is sealed against the hydrant inlet frost-proof.
- a spindle which is arranged substantially axially in the hydrant, manually reversed.
- this rotation is transferred to a spindle nut, whereby the axially extending in the hydrant section of the spindle, also called valve rod, axially guided up and down.
- the obturator is located below the so-called frost limit, so that there is no freezing of the water.
- the discharge of water from the interior of the riser serves to reduce corrosion inside the hydrant and to prevent nucleation in stagnant water.
- Slider hydrants are also known, in which the shut-off device comprises a slide and cooperating sealing surfaces, into which the slide is pushed in to shut off.
- the document US 3,858,599 discloses a hydrant with a drain device for draining water from the riser of the hydrant after closing the obturator.
- the disclosed drainage device comprises a drain pipe arranged in the riser and above the obturator, which, after closing the obturator, connects the interior of the riser to the outside thereof and opens into a gravel bed. This is to allow the drainage of the water with a reduced risk of constipation.
- drainage devices can clog for dewatering the riser interior and thus only insufficient drainage takes place.
- the blockages may be due to blockage of the orifice of respective drainage pipes, for example, by compacting the soil in the section of the mouth of the drainage pipe.
- the level of groundwater may rise due to heavy rains.
- the aforementioned risk of freezing of water thus there is a further risk of nucleation inside the hydrant.
- This allows germs to come into contact with fresh water from the water distribution network.
- germ-contaminated water is expelled, which can lead to health hazards to humans and animals. It is therefore an object of the present invention to provide a hydrant, the riser can be reliably dewatered.
- a hydrant which comprises a riser with an interior and an outside and a shut-off, which from at least one open position in at least one
- Closing position and vice versa can be brought brought brought, and wherein the obturator is formed in the closed position such that the interior of the riser is sealed against a hydrant inlet.
- the hydrant further comprises at least a first passage through which the interior of the riser pipe is fluidically connectable to the outside of the hydrant, and a second passage through which the hydrant inlet under pressure can be fluidly connected to the outside of the hydrant, wherein the first and second passages can be brought into operative connection with one another, wherein this operative connection generates a negative pressure by means of water flowing through the second passage, so that water located in the interior of the riser pipe is discharged via the first passage and thereby the riser pipe is dehydrated.
- Advantages of the present invention include: The water inside the standpipe is reliably expelled by the pressurized water from the hydrant inlet by means of the venturi principle. As a result, the riser is emptied reliably by means of strong negative pressure.
- the structure is particularly simple and can be done without complex components, so that a high reliability of the drainage of the riser is given.
- the passages are closed. As a result, a return of water from the soil is prevented in the interior of the riser. Thus, the interior of the riser is not contaminated with contaminated water.
- the drainage is done by means of a strong negative pressure, so that the drainage is even possible when the groundwater level is higher than the water level in the interior of the riser.
- the jet pump is integrated in the hydrant. Thus, no cumbersome and lengthy work to lay drainage pipes and possibly other external components must be made. There are no additional attachments necessary.
- the drainage device of the hydrant is particularly easy to operate.
- the drainage device can be retrofitted to many hydrant types. Furthermore, the dewatering device can be used in almost all types of shut-off devices. Hydrants already installed in the field can be retrofitted with the dewatering device of the hydrant according to the invention. Dewatering can be accelerated by providing multiple jet pumps to a dewatering device at the bottom of the riser. The jet pumps can be arranged at a certain angular distance from each other.
- the drainage can be controlled manually or electrically, e.g. with the help of an actuator.
- the actuator may comprise an electrically or mechanically controllable valve.
- the passages can be opened and locked particularly reliably.
- the drainage can be done by a valve rod of the hydrant, which usually serves to open and close the obturator is rotated to a predetermined rotational position.
- a valve rod of the hydrant which usually serves to open and close the obturator is rotated to a predetermined rotational position.
- FIGS. 1 a - c show a sectional view of a section of a shut-off device of a hydrant in different valve positions according to a first variant of a first embodiment
- Figure 2 is a sectional view of a portion of a shut-off device of a hydrant according to a second variant of the first embodiment
- Figure 3 is a sectional view of a portion of a shut-off device of a hydrant according to a third variant of the first embodiment
- FIGS. 4a-c show a sectional view of a section of a shut-off device of a hydrant in different valve positions according to a first variant of a second embodiment
- FIGS. 5a-c show a sectional view of a section of a shut-off device of a hydrant in different valve positions according to a second variant of the second embodiment
- FIGS. 6a-d show a sectional view of a section of a shut-off device of a hydrant in different valve positions according to a third variant of the second embodiment.
- FIGS. 7a-c show a sectional view of a section of a shut-off device of a slider hydrant in different slide positions according to a third embodiment.
- the figures la-c each show a sectional view of a hydrant 100 in different valve positions according to a first variant of a first embodiment.
- the hydrant 100 comprises a riser 102 with an interior 104.
- the riser 102 opens into at least one outlet (not shown) for expelling water.
- the water is transferred from a hydrant inlet 106 under pressure into the interior 104 of the riser 102.
- the hydrant 100 comprises a shut-off element 108, which is designed to be brought from at least one open position (see FIG. 1c) into at least one closed position (see FIG. 1b) and vice versa.
- the obturator 108 is designed to seal the interior 104 of the riser 102 against the hydrant inlet 106 in a fluid-tight manner.
- the obturator 108 comprises a main valve body 110 and at least one component of the hydrant 100 cooperating therewith for shut-off with a sealing surface.
- the obturator 108 is generally a valve with the main valve body 110, which can be brought into contact with sealing surfaces of the hydrant 100.
- the main valve body 110 is by means of an axially disposed drive device 111, which is formed, for example, as a valve rod, axially movable in relation to the other cooperating components of the obturator 108.
- To close the hydrant 100 of the main valve body 110 is transferred by means of the drive device 111 in the upper valve position shown in Figure lb, in which the obturator 108 is closed.
- the main valve body 110 is transferred downwardly, as shown in Figure lc. In this position, the water flows from the hydrant inlet 106 under pressure over at least partially exposed peripheral portions of the main valve body 110 in the riser 102.
- this is provided with lateral valve vanes 112 ', 112 ", which are arranged to axially guide the main valve body 110 in relation to static sections (also referred to as the main valve seat) of the obturator 108 circumferentially interrupted on the main valve body 110 and in this case at least in the open position (see Figure lc) with inner surface portions of the obturator 108 of the hydrant 100 are brought into contact.
- the dehydration of the hydrant 100 is meant here that the water contained in the interior 104 of the riser 102 is discharged to the outside.
- the water is sucked out of the riser 102 by means of a negative pressure, with the aid of the water under pressure from the hydrant inlet 106, and discharged or expelled to the outside.
- the first and second passages can be brought into operative connection with one another such that the water located in the interior of the riser pipe is expelled through the first passage to the outside of the hydrant by the energy (pressure) of the water flowing through the second passage.
- the riser is reliably dewatered without additional energy input (e.g., electrical, hydraulic).
- the drainage is advantageously accomplished only by means of the existing in the water distribution system pressure of the medium conveyed therein (water).
- the network pressure in the water distribution system is typically about 6 to 9 bar.
- the hydrant 100 comprises a first passage 114 ', 114 ", via which a fluid connection between the inner space 104 of the riser 102 and the Outside of the hydrant 100 can be made.
- the first passage 114 ', 114 "in the dewatering position of the obturator 108 is in an opening region
- the first passage 114', 114" in FIG Closing position of the hydrant 100 by the wall or sealing surfaces of the valve vanes 112 ', 112 "sealable
- the valve vanes 112', 112" in addition to their function to guide the main valve body 110 also formed by its sealing surface at least the first passage 114th
- the first passage 114 ', 114 "communicates with the inner space 104 via the opening area 115', 115" only in the dewatering position shown in FIG.
- a second passage 116 ', 116 " is simultaneously in fluid communication with the hydrant inlet 106, also only in the dewatering position shown in Fig. 1.
- the second passage 116', 116" leads to the outside.
- the pressurized water from the hydrant inlet 106 can be expelled via the second passage 116 ', 116 "to the outside of the hydrant 100.
- the first passage 114', 114" opens into one of the second In this case, the water discharged through the first passage 114 ', 114 "out of the riser 102 meets the water expelled to the outside via the second passage 116', 116" from the hydrant inlet 106 At least the first passage 114 ', 114 "and second passage 116', 116" in this case form the jet pump 113 ', 113 ", which discharges the water out of the inner space 104 of the riser 102 to the outside.
- the jet pump 113 ', 113 "comprises a vacuum chamber 118', 118" which adjoins the jet pump 113 ', 113 "
- the vacuum chamber 118 ', 118 can be subjected to negative pressure by the water flowing out of the hydrant inlet 106 via the second passage 116', 116" under pressure (jet pump principle or venturi).
- the vacuum space 118 ', 118 "subjected to negative pressure is in turn in fluid communication via the first passage 114', 114" with the interior 104 of the riser 102.
- the water is reliably removed from the interior 104 by means of negative pressure sucked out of the riser 102 and discharged to the outside.
- the first passage 114 ', 114 "and the second passage 116', 116" are sealed by the walls or sealing surfaces of the valve vanes 112 ', 112 ", in other words, the valve vanes 112 ', 112 "designed to close or open at least the first passage 114', 114" and second passage 116 ', 116 "by means of their sealing surface.
- a jet of water flows under full line pressure from the hydrant inlet 106 via the second passage 116', 116" into the vacuum chamber 118 ', 118 " the second passage 116 ', 116 ".
- a mixing of the media whereby kinetic energy is transmitted from the water jet from the hydrant inlet 106 to the surrounding water from the riser 102 and thus a conveying mechanism is made available.
- the time for discharging the water out of the riser 102 is almost halved in relation to an example in which only one jet pump is provided.Of course, although not shown in FIGS a jet pump may be provided on the hydrant 100. Of course, however, three or more jet pumps may also be provided on the hydrant 100 (not shown).
- the hydrant 100 In the dewatering position shown in FIG. 1a, the hydrant 100 is closed, ie the direct fluid connection between the hydrant inlet 106 and the interior space 104 of the riser 102. To transfer the hydrant 100 from the dewatering position shown in FIG. 1a to the completely closed valve position or closed position shown in FIG.
- the main valve body 110 is moved axially downwards by means of the drive device 111 (valve rod)
- the drive device 111 valve rod
- the first Du By way of peripheral sections of the valve vanes 112 ', 112 ", the passage 114', 114" is sealed against the interior 104 of the riser 102 in a fluid-tight manner.
- the second passage 116 ', 116 " is sealed in a fluid-tight manner by circumferential sections of the main valve body 110 relative to the hydrant inlet 106.
- the hydrant 100 is advantageously transferred from the dewatering position into the closed valve position or closing position of the obturator 108 after dewatering the riser 102
- the first variant of the first embodiment shown in Figures la-c comprises the obturator 108 a main hydrant valve, which here by sections of the hydrant 100 itself (also referred to as the main valve seat or sealing surfaces of the hydrant) and the main valve body 110 is formed
- Hydrants 100 may be at least related to: first passage 114 ', 114 ", second passage 116', 116", jet pump 113 ', 113 ", vacuum chamber 118', 118", but not limited thereto.
- the jet pump 113 ', 113 is adapted to direct the water from the interior 104 of the riser 102 by direct impingement to dissipate the supplied water on the hydrant inlet 106 to the outside.
- an actuator is provided, which produces only in the dewatering position, a fluid connection between the interior 104 of the riser 102 and the outside of the hydrant 100 and between the hydrant inlet 106 and the outside of the hydrant 100.
- this actuator is in this case comprised in the shut-off element 108 or main valve body 110 and the hydrant 100 itself.
- the jet pump 113 ', 113 " is designed to discharge the water out of the interior 104 of the riser 102 to the outside by direct admission through the water supplied from the hydrant inlet 106.
- the riser 102 of the hydrant 100 exemplified in the described embodiment may include a vent (not shown) by which a pressure differential between the interior 104 of the riser 102 and the outside of the hydrant 100 when dewatering the riser 102 is compensated.
- a vent not shown
- the hydrant may include an indication device (not shown), by means of which the operator receives an indication of the water level in the interior 104 of the riser 102.
- the indicating device can be operatively connected to the ventilation opening and comprise at least one vibration body which generates an audible oscillation when air flows over and / or through it.
- a negative pressure is generated, which is compensated by the ventilation opening. Air thus flows from outside into the interior 104 of the riser 102.
- the vacuum is generally generated in the dewatering position of the hydrant 100. In the dewatering position of the hydrant 100, the negative pressure can be generated even when the riser 102 is already dewatering is.
- the air flow may excite the vibrating body included in the notice device to an audible vibration.
- FIG. 2 shows a sectional view of the hydrant 100 in a second variant of the first embodiment. Identical or equivalent components with respect to the first variant of the first embodiment are identified by the same reference numerals.
- the hydrant 100 shown in FIG. 2 likewise comprises the first passage 114, the second passage 116 and the jet pump 113 with the vacuum chamber 118.
- the second variant differs from the first variant with respect to the design of the actuator. Furthermore, only one jet pump 113 is shown here.
- the actuator comprises electrically controllable valves 120 ', 120 "which enable or block fluid communication between the interior 104 of the riser 102 and the jet pump 113 and fluid communication between the hydrant inlet 106 and the jet pump 113. More specifically , the first electrically controllable valve 120 'releases or blocks a fluid communication between the riser 102 and the jet pump 113. Further, the second electrically actuable valve 120 "is configured to release fluid communication between the hydrant inlet 106 and the jet pump 113 to lock.
- Both electrically controllable valves 120 ', 120 " can be actuated via an electrical control unit 122.
- the electrically controllable valves 120', 120" are connected to the electrical control unit 122 via a respective signal connection 124 ', 124 ". may be an electrical signal line (cable) or a radio connection (wireless connection).
- a respective signal connection 124 ', 124 ". may be an electrical signal line (cable) or a radio connection (wireless connection).
- the hydrant 100 is closed by the main valve body 110, that is, no water is transferred from the hydrant inlet 106 up into the riser 102.
- the two electrically activatable valves 120 ', 120 " can be opened by opening the control unit 122 until the riser 102 is emptied (dewatering position) 120 ', 120 "closed.
- the control unit 122 can be actuated via the drive device 111 (valve rod) for opening the two electrically activatable valves 120 ', 120 "
- the control unit 122 switches the two electrically controllable valves 120 ', 120 "into their closed position as soon as the riser 102 is dewatered.
- the two electrically controllable valves 120', 120" can essentially pass through into the dewatering position be controlled simultaneously to open and close.
- the first passage 114 is first blocked and then the second passage 116 is blocked.
- the changeover can be controlled by a timer which may be included, for example, in the control unit 122.
- control unit 122 may actuate the two electrically controllable valves 120 ', 120 "to close once a deflate is exhausted via a float (not shown) which serves as a sensor Condition of the riser 102 is detected.
- a sensor 126 may be attached, which transmits an indication of the conveyed water to the control unit 122.
- the sensor 126 is connected to the control unit 122 via a signal connection 128.
- the signal connection 128 may be an electrical signal line or a radio connection.
- only one electrically controllable valve can be provided, which opens or blocks the two passages 114, 116 simultaneously or briefly in succession.
- this valve can also be arranged in the main valve and close or release at least one corresponding bore in the main valve.
- at least one mechanically controllable valve may also be provided.
- the obturator 108 includes a main hydrant valve, which is here by sections of the hydrant 100 itself (sealing surfaces thereof) and the main valve body 110 is formed.
- FIG. 3 shows a sectional view of the hydrant 100 in a third variant of the first embodiment. Identical or equivalent components with respect to the first and / or second variant of the first embodiment are identified by the same reference numerals.
- the hydrant 100 shown in Figure 3 also includes the first passage 114 and the second passage 116, which are here by means of a mechanical pump 130 in operative connection with each other so that the water from the interior 104 of the riser 102 by means of indirect from the Hydranteneinlauf 106 supplied water is discharged to the outside.
- the pump 130 shown in FIG. 3 is designed as a radial centrifugal pump. However, the pump 130 may also be formed as an axial or diagonal centrifugal pump (not shown). Alternatively, the mechanical pump 130 may also be designed as a piston pump, diaphragm pump or any type of positive displacement pump.
- a turbine wheel 132 encompassed in the centrifugal pump 130 is acted upon and turned over by the water flowing in under pressure from the hydrant inlet 106.
- a shaft 134 connected axially to the turbine wheel 132 protrudes into a vacuum chamber of the centrifugal pump 130 and allows the water flowing in from the riser 102 through the first passage 114 to flow through Centrifugal force flow radially outward.
- the water in this case flows into an annular space 136 and is expelled here to the outside.
- the first 114 and second 116 passages are opened and closed via a schematically illustrated sliding device 138 (valve device). In the variant shown, the first 114 and second 116 passage are blocked via the sliding device 138. By moving the shifter 138 upwardly, the first 114 and second 116 ports are opened. Alternatively, the first 114 and second 116 passages may be opened and closed via electrical valves (not shown).
- FIGS. 4a-c each show a sectional view of a hydrant 200 in different valve positions according to a first variant of a second embodiment.
- 4b shows the hydrant 200 with a closed obturator 208. In this position, a hydrant inlet 206 and an interior 204 of a riser 202 are fluid-tightly sealed from one another by a main valve body 210 of the obturator 208.
- the main valve seat of the hydrant 200 is formed in the illustrated embodiment as an insertable and removable hydrant 200 change-valve seat 222.
- the main valve body 210 can be converted by means of a drive device 211 relative to the replacement valve seat 222 from at least one open position into at least one closed position and vice versa.
- the drive device 211 is formed as an axially movable valve rod.
- the alternate valve seat 222 is provided at a portion thereof (shown on the right side of the shuttle valve seat 222 in FIGS. 4a-c) with a first opening 224, one end of which opens into a passage space 226.
- the passage space 226 is formed annularly around the exchange valve seat 222 and is externally closed by material portions of the hydrant 200.
- an opening portion 227 of the main valve body 210 abuts an end of the first opening 224 opposite to the passage space 226.
- the opening portion 227 of the main valve body 210 in turn communicates with the interior 204 of the riser 202 in fluid communication.
- the valve leaf 212 "inside with a valve-wing inner pipe (not shown), via which the opening portion 227 with the interior 204 of the riser 202 in fluid communication can be brought. Therefore, in the first variant of the second embodiment shown in Figure 4a, the water in riser 202 flows through the first opening 224 in the passage space 226.
- the dewatering position of the main valve body 210 in relation to the change-valve seat 222 is thus the interior 204 of the riser 202 over the first opening 224 is in fluid communication with the passage space 226.
- the change-over valve seat 222 is annular and comprises at least two circumferential grooves on the outer surface for receiving in each case an annular seal 228 ', 228 ", which seal the interior 204 of the riser 202, the passage space 226 and the hydrant inlet 206 against each other
- Alternate valve seat 222 further includes a second passage 216 through which hydrant inlet 206 (in the dehydrating position shown in Figure 4a) may be fluidly communicated with passageway 226. Further, second passageway 216 extends axially across passageway 226 The second passage 216 is in fluid communication with the outside of the hydrant 200 via the first passage 214. Thus, the pressurized water flowing out of the hydrant inlet 206 directly impacts that in the passage space
- the first passage 214 and the second passage 216 each have a cylindrical cross section.
- the second passage 216 has a smaller diameter in relation to the first passage 214.
- the first passage 214 has a circular cross-section with a diameter which varies in the longitudinal direction.
- the diameter in a first portion of the first passage 214 tapers in the flow direction and widens from a second portion with a minimum diameter in a third portion to the outside.
- the first passage 214 comprises a nozzle insertable in the hydrant body, in particular a Venturi nozzle.
- the Venturi nozzle may be formed trumpet-like.
- the first passage 214 thus has a narrowed section in the second embodiment shown, which forms the vacuum chamber 218, within which the flow velocity of the water is increased in relation to the other sections of the first passage 214, since the flow velocity behaves inversely proportional to the pipe cross-section. According to Bernoulli's law, the increase in the flow velocity of the water is accompanied by a drop in pressure. Due to the resulting pressure drop in the section of the first passage 214 with a minimal cross-section, ie the vacuum chamber 218, the water is sucked out of the passage space 226 by means of negative pressure and expelled or discharged to the outside of the hydrant 200.
- the first passage 214 may have an unaltered cylindrical cross-section throughout its length. It proves to be advantageous if the ratio between the inner diameter of the first passage 214 (or between a minimum inner diameter thereof) and a minimum inner diameter of the second passage 216 is 2: 1 to 15: 1, in particular 3: 1 to 4: 1 amounts to.
- the minimum inner diameter of the first passage 214 is preferably 8 mm to 19 mm, and the minimum inner diameter of the second passage 216 is preferably 2 mm to 2.5 mm.
- the main valve body 210 can be moved axially downwards by way of the drive device 211 in order to assume the closed position shown in FIG. 4b.
- the first opening 224 at the upstream end is sealed off by a sealing circumferential section (sealing surface) of the main valve body 210.
- the second passage 216 is sealed by a sealing peripheral portion (sealing surface) of the main valve body 210, so that the second passage 216 is sealed from the hydrant inlet 206.
- the hydrant inlet 206 is likewise sealed off from the interior 204 of the riser 202.
- the main valve body 210 In order to draw the water from the hydrant 200 starting from the closed position, the main valve body 210 is moved downwards via the drive device 211 until the water pressurized in the hydrant inlet 206 passes through an opening annular gap between the upper side of the main valve body 210 and the underside of the change-valve seat 222 flows upward, that is up in the Interior 204 of the riser 202. After the removal of water, the main valve body 210 is transferred from the valve position shown in Figure 4c in the dewatering position shown in Figure 4a, to eject the accumulated in the riser 202 water to the outside of the hydrant 200.
- Figures 5a-c show a sectional view of the hydrant 200 in different valve positions according to a second variant of the second embodiment of the invention.
- This second variant differs from the first variant shown in FIGS. 4a-c in that the lower circumferential section of the main valve body 210 in the closed position (FIG. 5a) always seals against the inner circumference of the
- Change valve seat 222 is applied. In contrast to the valve position shown in Figure 4a in the first variant of the second embodiment, thus in the second variant of the second embodiment, regardless of the valve position, no water from the hydrant inlet 206 via a directly vertically aligned recess on the main valve body 210th flow into the second passage 216.
- the main valve body 210 is provided with a main valve body inner conduit (not shown) which provides fluid communication between the hydrant inlet 206 and the inlet of the second passage 216 once the main valve body 210 is in the dewatering position shown in Figure 5b.
- the main valve body inner pipe may be a recess at a peripheral portion of the main valve body 210. In this case, this recess is not directly vertical (not axially) aligned.
- the pressurized water from the hydrant inlet 206 flows only in this dewatering position via the main valve body inner conduit into the second passage 216 and from there into the annular passage space 226 and further into the first passage 214.
- the passage space 226 is above the first opening 224 and a valve vane inner conduit (not shown) in fluid communication with the interior 204 of the riser 202.
- the hydrant 200 starting from the representation of the hydrant 200 shown in FIG. 5c in the open position (opened shut-off device 208), moves directly into the dewatering position by moving the main valve body 210 upwards. bar, as shown in Figure 5b.
- the main valve body 210 After dewatering the riser 202, the main valve body 210 is then also moved directly further upwards, finally to take the closed position, as shown in Figure 5a.
- FIG. 6 d shows an enlargement of a section X marked in FIG. 6 c.
- the main valve body 210 can be rotated relative to the fixed exchange valve seat 222, at least in the dewatering position (FIGS. 6 c, d) by means of an adjusting device 211.
- the obturator 208 is configured to release the passage of water through the first passage 214 and the second passage 216 by turning the main valve body 210 in relation to the changeover valve seat 222, starting from the closed position of the hydrant 200 (FIG. 6 b) becomes ( Figures 6c, d).
- the main valve body 210 In the open position of the hydrant 200 shown in FIG. 6 a, the main valve body 210 is displaced axially downward by means of the adjusting device 211 so that the water from the hydrant inlet 206 rises under pressure into the interior 204 of the riser 202.
- the main valve body 210 - starting from the closed position (FIG. 6 b) - is turned over by means of the adjusting device 211 in relation to the alternating valve seat 222.
- the adjusting device 211 is formed by the aforementioned drive device or valve rod.
- the main valve body 210 is turned over by means of the adjusting device 211, by means of which also the main valve body 210 is moved upwards and downwards.
- other components may be adopted as an adjustment device for reversing the main valve body 210.
- passage portions of the main valve body 210 overlap with both the first opening 224 ', 224 "and the second passage 216.
- the aforementioned passage portions may include, for example, one or more recesses in the main valve body 210 over which the pressurized water in the hydrant inlet 206 flows into the second passage 216 and over which the water flows from the riser 202 into the first opening 224 ', 224 ".
- valve vanes 212 ', 212 "move from the sealing contact against the first opening 224', 224" (FIG. 6a-d) by reversing the main valve body 210 in relation to the rotationally fixed exchange valve seat 222 (FIG. as can be seen particularly clearly in Figure 6d), so that the water can flow out of the interior 204 of the riser 202 through the first opening 224 ', 224 "into the annular passage space 226. Due to the previously described jet pump effect, the water is then entrained. After the drainage has taken place, the main valve body 210 is merely turned back again in order to assume the closed position shown in FIG.
- a particular advantage of this embodiment is that the main valve body 210 requires no further axial height adjustment in order to be transferred to the position for dewatering.
- the operator can move the main valve body 210 as usual between two maximum valve positions, namely a fully open position (see Figure 6a) and a fully closed position (see Figure 6b).
- no further height adjustment is necessary for dewatering, but the main valve body 210 is rotated only at a certain angle in relation to the rotationally fixedly mounted change-valve seat 222.
- the shuttle valve seat 222 may be reversed relative to the rotationally fixed main valve body 210.
- the second passage 216 is diverted in such a way, or displaced from the linear (substantially horizontal) course, that the section facing the hydrant inlet 206 is diverted downwards (folded over).
- FIGS. 7a-c show a sectional view of a hydrant 300 according to a third embodiment.
- the hydrant 300 illustrated in FIGS. 7a-c is a slide hydrant.
- the obturator 308 includes a slide 310, which is pushed by a drive device 311 in the path between the hydrant inlet 306 and inner space 304 of a riser 302 or pushed out.
- the shut-off device 308 thus comprises the slide 310 and cooperating sealing surfaces of the hydrant 300.
- the dewatering position is shown in the slide position of the hydrant 300 shown in FIG. 7a.
- passages are released or blocked to a jet pump 313 via the shut-off device 308 itself.
- the hydrant 300 is completely closed.
- the slider 310 is completely in the path between hydrant inlet 306 and inner space 304 of the riser 302 is pushed sealingly.
- fluid lines between the jet pump 313 and the interior 304 of the riser 302 and the hydrant inlet 306 are interrupted.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Details Of Valves (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Taps Or Cocks (AREA)
- Lift Valve (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22183936.8A EP4092206A1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2016/053234 WO2017140346A1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22183936.8A Division EP4092206A1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
EP22183936.8A Division-Into EP4092206A1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3417117A1 true EP3417117A1 (de) | 2018-12-26 |
EP3417117B1 EP3417117B1 (de) | 2022-08-17 |
Family
ID=55404703
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16705477.4A Active EP3417117B1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
EP22183936.8A Withdrawn EP4092206A1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22183936.8A Withdrawn EP4092206A1 (de) | 2016-02-16 | 2016-02-16 | Hydrantenentwässerung |
Country Status (6)
Country | Link |
---|---|
US (1) | US10865549B2 (de) |
EP (2) | EP3417117B1 (de) |
CA (1) | CA3021242A1 (de) |
RU (1) | RU2706217C1 (de) |
UA (1) | UA123106C2 (de) |
WO (1) | WO2017140346A1 (de) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE216870C (de) * | 1909-01-14 | 1909-12-06 | ||
US1433110A (en) * | 1920-05-22 | 1922-10-24 | Leon T Buckler | Hydrant-draining device |
US2020071A (en) * | 1931-09-05 | 1935-11-05 | Herbert M Lofton | Fire hydrant |
US2481909A (en) * | 1945-06-06 | 1949-09-13 | Harold E Dales | Drain device |
US3858599A (en) | 1973-10-16 | 1975-01-07 | Mark Controls Corp | Sanitary frostproof hydrant |
US3980097A (en) * | 1975-07-29 | 1976-09-14 | Mueller Co. | Fire hydrant with drain valve and backflow preventer mechanism |
US4520836A (en) * | 1983-08-26 | 1985-06-04 | Physical Systems, Inc. | Freezeproof valve assembly |
US4653521A (en) * | 1986-07-07 | 1987-03-31 | Woodford Manufacturing Company | Freezeless ground hydrant and method for operating same |
US6085776A (en) * | 1999-10-13 | 2000-07-11 | Hoeptner, Iii; Herbert W. | Water supply system |
RU2259219C1 (ru) * | 2004-03-22 | 2005-08-27 | Московское Государственное Унитарное Предприятие "Мосводоканал" | Пожарный гидрант |
CH707819A1 (de) * | 2013-03-19 | 2014-09-30 | Vonroll Infratec Invest Ag | Hydrantenhauptventil mit Wechsel-Ventilsitz. |
-
2016
- 2016-02-16 EP EP16705477.4A patent/EP3417117B1/de active Active
- 2016-02-16 CA CA3021242A patent/CA3021242A1/en active Pending
- 2016-02-16 WO PCT/EP2016/053234 patent/WO2017140346A1/de active Application Filing
- 2016-02-16 EP EP22183936.8A patent/EP4092206A1/de not_active Withdrawn
- 2016-02-16 RU RU2018131126A patent/RU2706217C1/ru active
- 2016-02-16 UA UAA201809408A patent/UA123106C2/uk unknown
- 2016-02-16 US US16/094,554 patent/US10865549B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2017140346A1 (de) | 2017-08-24 |
UA123106C2 (uk) | 2021-02-17 |
US10865549B2 (en) | 2020-12-15 |
EP4092206A1 (de) | 2022-11-23 |
EP3417117B1 (de) | 2022-08-17 |
US20190119887A1 (en) | 2019-04-25 |
CA3021242A1 (en) | 2017-08-24 |
RU2706217C1 (ru) | 2019-11-15 |
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