ROHRDROSSEL

Abstract

The present disclosure relates to a pipe throttle (14) for attachment to a pipe inlet (2) of a drain pipe (4), comprising a base element (16) having a base element casing (18), a first base element end (20), and a second base element end (22), wherein the base element casing (18) has a first base element inlet opening (24), and wherein the second base element end (22) forms a base element overflow opening (30) and / or is designed for attachment thereto of an attachment box (44) separate from the base element (16). The disclosure further relates to a flood protection system (12) having a pipe throttle (14), a use of a pipe throttle (14), and a method for arranging, in particular retrofitting, a drain pipe (4) having a pipe throttle (14).

Description

[0001] The disclosure relates to a pipe throttle, a flood protection system comprising a pipe throttle, a use of a pipe throttle and a method for arranging, in particular retrofitting, a drain pipe with a pipe throttle. Background of the Revelation

[0002] Elevated or raised roads or other elevated access routes create a barrier to water in streams, ditches, or other low-lying areas of the landscape. Roads and other access routes are usually publicly owned and belong to municipalities, for example, whereas land adjacent to roads is often privately owned and is used for farming, for example. Drainpipes are installed as road culverts to allow water to flow from one part of the landscape on one side of the road to another on the other side. These pipes can be used, for example, to divert a stream or to drain water that has accumulated during heavy rainfall.Such pipes are usually round and, for small internal diameters, for example up to 1000 mm, thick-walled and made of concrete or reinforced concrete, and for larger internal diameters, for example from 1000 mm, thin-walled and made of metal, for example corrugated iron, or plastic.

[0003] During heavy rainfall events, large volumes of water flow through such pipes from the first part of the landscape on one side of the road to the second part of the landscape on the other side. This is particularly problematic when downstream residential areas in the second part of the landscape are threatened by a flood event, especially a peak flood wave, and at the same time, the water volumes in the first part of the landscape are not used for the desired groundwater recharge. Brief description of the revelation

[0004] In view of the problems described above, it is therefore an object of the disclosure to avoid or at least reduce the risk of a residential area being endangered by flooding in the event of a heavy rainfall event, while at the same time the large available water masses are used in a suitable manner for groundwater recharge.

[0005] This object is achieved by a pipe throttle according to claim 1, a flood protection system according to claim 11, a use of a pipe throttle according to claim 14 and a method for arranging, in particular retrofitting, a drain pipe with a pipe throttle according to claim 15. Advantageous embodiments are claimed in the dependent claims and / or described below in the description.

[0006] The pipe throttle according to the disclosure for attachment to a pipe inlet of a drain pipe comprises a base element with a base element casing, a first base element end and a second base element end, wherein the base element casing has a first base element inlet opening, and wherein the second base element end forms a base element overflow opening and / or is designed for attachment thereto of an attachment box separate from the base element.

[0007] The disclosure further relates to a flood protection system with a drain pipe having a pipe inlet and a pipe throttle which is attached to the pipe inlet of the drain pipe, with a base element which has a base element casing, a first base element end and a second base element end, wherein the base element casing has a first base element inlet opening whose opening cross section is smaller than an opening cross section of the drain pipe, and wherein the second base element end forms a base element overflow opening and / or is designed for attaching thereto an attachment box which is separate from the base element.

[0008] The disclosure further relates to a use of a pipe throttle, in particular for attachment to a pipe inlet of a drain pipe, wherein the pipe throttle has a base element which has a base element casing, a first base element end and a second base element end, wherein the base element casing has a first base element inlet opening whose opening cross section is smaller than an opening cross section of the drain pipe, and wherein the second base element end forms a base element overflow opening and / or is designed for attachment thereto of an attachment box which is separate from the base element.

[0009] The disclosure further relates to a method for arranging, in particular retrofitting, a drain pipe having a pipe inlet, with a pipe throttle having a base element comprising a base element casing, a first base element end and a second base element end, wherein the base element casing has a first base element inlet opening whose opening cross section is smaller than an opening cross section of the drain pipe, and wherein the second base element end forms a base element overflow opening and / or is designed for attaching thereto an attachment box separate from the base element, comprising at least the step of: attaching the pipe throttle to a pipe inlet of the drain pipe.

[0010] A method for arranging, in particular retrofitting, a drainpipe with a pipe throttle includes attaching the pipe throttle to a pipe inlet of the drainpipe before, during, and after installation and / or use of the drainpipe. The pipe throttle can therefore, for example, be manufactured and / or supplied directly by a pipe manufacturer as a finished part or as an assembly system and / or be already arranged on the drainpipe during installation; it can also be attached to (new) pipes and / or pipe types as a prefabricated attachment system.

[0011] It is understood that the base member shell extends between the first base member end and the second base member end and forms or is formed with the first base member end and the second base member end at its axial ends. The first base member end is intended to be close to or in contact with a ground, and the second base member end is intended to be farther from the ground.

[0012] The base element shell may consist of four side surfaces forming a rectangle, or may consist of a different number of side surfaces, or may also be, for example, a cylindrical shell. It is understood that a base element interior is formed by the base element shell or (partially) bounded by the base element shell, and that the pipe throttle is intended to allow water to flow from the base element interior into a drain pipe.

[0013] The first base element inlet opening is provided to allow water to flow from a landscape section upstream of the pipe throttle or on the pipe inlet side into the pipe throttle or into the base element interior. It should be understood that inlet openings of the pipe throttle can be formed as a recess at the edge of a shell / a shell side surface or as a hole in a shell / in a shell side surface.

[0014] The opening cross-section of the first base element inlet is smaller than the opening cross-section of the drain pipe. The base element inlet is thus designed to throttle water, meaning that a smaller amount per unit of time can flow from the upstream landscape section through the base element inlet into the drain pipe when the pipe throttle is used than if the pipe throttle were not used. This can lead to a buildup / damming / backup of water and / or a rising water level in the upstream landscape section, for example, during heavy rainfall.

[0015] An upstream or pipe inlet-side landscape part is understood, for example, to be a landscape part located before or upstream of the pipe throttle and / or the discharge pipe. A downstream or pipe outlet-side landscape part is understood, for example, to be a landscape part located behind or downstream of the pipe throttle and / or the discharge pipe. However, the disclosure is not limited thereto. In particular, both the upstream and downstream landscape parts can be built-up and / or non-landscape parts or locations.

[0016] The second base element end can form a base element overflow opening. In other words, this means that the base element overflow opening can be an opening in the second base element end, or the second base element end can define the opening through its shape. An overflow opening of the pipe throttle allows water to flow from a landscape section upstream of the pipe throttle into the pipe throttle and is designed to allow water to flow unthrottled through the pipe throttle into the drainpipe. This means that the same amount of water per unit of time that can flow directly into the drainpipe without using the pipe throttle can also flow into the drainpipe when using the pipe throttle due to the overflow opening. In other words, the overflow opening is designed to allow unthrottled flow from the upstream landscape section into the drainpipe.This means that at a water level in the upstream landscape section at which water flows through the overflow opening into the pipe choke and the discharge pipe, water in the upstream landscape section is no longer dammed up by the pipe choke. In other words, the overflow opening utilizes the full opening cross-section of the discharge pipe. This can be achieved by making the opening cross-section of the overflow opening larger than the opening cross-section of the discharge pipe, or by making the opening cross-section of the overflow opening, together with the opening cross-sections of all or individual inlet openings of the pipe choke, larger than the opening cross-section of the discharge pipe.

[0017] Furthermore, the second base element end can be configured for attaching an add-on box that is separate from the base element. This can mean, for example, that the second base element end defines a flat surface / plane onto which an add-on box can be placed, or that the second base element end is configured to enable a plug-in connection or positive connection of the base element to an add-on box. For example, the second base element end can have one or more grooves or recesses into which one or more counterparts of an add-on box can fit / engage, so that a positive connection can be established. However, the disclosure is not limited thereto; other types of connection can also be provided and / or implemented in other ways.

[0018] The advantages of the present disclosure are that the flow into a drainpipe can be throttled easily and without the use of external energy by the pipe throttle. This can flatten a flood peak wave downstream. By throttling, less water flows through the drainpipe in a period of time / water flows more slowly. This gains time for infiltration and groundwater recharge, and downstream residential areas can be protected from flooding. The pipe throttle has an overflow function so that water is only dammed up to the level of the overflow by the pipe throttle. This ensures that upstream residential areas are not exposed to the risk of flooding due to the pipe throttle, or that the road under which the drainpipe runs is not flooded.Accumulated water can be diverted into irrigation units and used in agriculture, for example. The pipe choke can complement agricultural measures to reduce runoff from fields by throttling the flow. The height of the pipe choke and thus the maximum water accumulation height caused by the pipe choke can be easily varied using add-on boxes. Due to the height-staggered inlet openings, more water can flow through the pipe choke at a higher water level. This means that more water can flow away at a higher water level, thus counteracting a further rise in the water level. Individual low backwater potentials from pipe chokes on drainpipes can, when several drainpipes are connected in series, create a large backwater potential.Because the pipe throttle can be attached directly to a drainpipe, for example, on a street, a municipality does not need to purchase land for this device. The pipe throttle is characterized by a particularly simple design and is easy to attach to a drainpipe. If necessary, a drainpipe can easily be retrofitted to accommodate the pipe throttle. This makes it particularly cost-effective. The pipe throttle is characterized by simple installation and removal and still allows good and easy access to the drainpipe.

[0019] The pipe throttle is preferably provided at a pipe inlet of a drainage pipe which extends beneath a road and establishes a fluidic connection between a first, upstream part of the landscape and a second, downstream part of the landscape. However, the pipe throttle is not limited to drainage pipes which extend beneath a road, but can also be provided, for example, at drainage pipes which are located beneath a railway embankment, cycle paths, pedestrian walkways or other elevations or alternatively, for example, at a pipe of a retention basin, collecting tank or pond. A stream can also be diverted through a drainage pipe, for example from one side of a road to the other. In this case, the pipe throttle can be located in the stream or on the stream bed, with the stream then flowing through the pipe throttle and the drainpipe.

[0020] Preferably, the first base element inlet opening in the base element casing is located at an angle offset from the pipe inlet of the drainpipe, meaning not close to the pipe inlet of the drainpipe, but particularly preferably at a 180° angle to it, for example, on a side surface of the casing (diametrically opposite) the pipe inlet of the drainpipe. This results in water being able to flow straight through the first base element inlet opening into the pipe inlet of the drainpipe. Thus, the pipe throttle does not change the flow direction of, for example, a stream.

[0021] Preferably, the first base element inlet opening is a dry weather drainage inlet opening. This means that a small amount of water (dry weather drainage) can flow unthrottled through the first base element inlet opening through the pipe throttle into the drainage pipe. Thus, the pipe throttle has no influence on the water level of the upstream landscape section during dry periods, or in other words, the pipe throttle does not increase the water level in the upstream landscape section during dry periods. This can be achieved by ensuring that a maximum distance of the first base element inlet opening perpendicular to the second base element end is not less than a maximum distance of the pipe inlet of the drainage pipe perpendicular to the second base element end.This means that when the pipe throttle is used, the water level does not have to be higher for water to flow through the first base element inlet opening into the base element interior and into the drainpipe than if no pipe throttle were used and the water would flow directly into the drainpipe at this water level. In other words, this means that the pipe throttle allows water from an upstream part of the landscape, which would flow into the drainpipe even without the pipe throttle, to also flow into the drainpipe. Alternatively or additionally, the first base element inlet opening is preferably a recess in the base element casing away from / at the first base element end, which is designed to allow water, for example from a stream running through the drainpipe, to flow away unthrottled at normal water levels in the stream (i.e. during dry periods and / or normal water levels, but not during floods, for example due to heavy rainfall).Such a recess saves material and is easy to manufacture. The first base element inlet opening is preferably designed so that a dry weather runoff water level is no closer to the second base element end than the first base element inlet opening, i.e. so that the water level in the upstream landscape section does not exceed the first base element inlet opening during dry periods. Particularly in the case of streams or constantly water-bearing ditches, it is particularly preferable to allow twice or three times the dry weather runoff volume to flow unhindered / unthrottled through the first base element inlet opening so as not to impair normal rain or snowmelt runoff. The volume is usually (co-)determined by a specialist authority, such as the water management office. This means that the first base element inlet opening only becomes effective during heavy rainfall events.Therefore, during dry periods, the water level in the upstream landscape section is preferably at, for example, half the height of the first base element inlet opening. In other words, the dry weather outflow opening has a throughput reserve, so that in addition to the (normal) dry weather outflow, for example, the same amount of water can flow away unthrottled. Thus, water in the upstream landscape section is not dammed by the pipe throttle during light rainfall or due to natural seasonal fluctuations, but only during flood events.

[0022] The pipe choke preferably has a mounting device which is provided for fastening the base element of the pipe choke to the pipe inlet of the drainpipe. The mounting device can have fastening components which are fastened or can be fastened to the drainpipe, preferably angle irons, to which the base element can be attached. The angle irons are preferably fastened to the drainpipe or a slope head, which can be attached to the drainpipe and is to be understood as part of the drainpipe, using screws and / or dowels. This makes it easy to retrofit a drainpipe for the attachment of a pipe choke. The base element is preferably placed, leaned or inserted onto two angle irons which are attached to the side of the drainpipe.Preferably, angle irons are cut to an angle of approximately 60-70 degrees at at least the lower end, which is the end closer to the ground when the angle irons are attached to the drainpipe, and welded to a preferably square (iron) plate, whereby the (iron) plate forms a projection. The projection can also be made of a different material or have a different shape. The projection then serves as a fixed stop shoe or support shoe so that the base element of the pipe choke can be placed on it and cannot slide down the angle iron or be pushed out. The base element is therefore stable and secure. Angle irons and in particular the projection can be viewed as a holding device for the base element. The base element can therefore be placed on and removed from the angle iron without tools.This allows easy assembly and disassembly of the base element, for example for cleaning work on the pipe throttle and / or the drain pipe.

[0023] The mounting device preferably has at least one fastening bolt with which the base element is fastened to the angle iron. For this purpose, holes can be provided in the base element casing and in the angle iron through which the fastening bolt can be pushed, whereby these holes in the base element casing can be sealed watertight. However, sealing can also be omitted if, for example, holes seal themselves due to washed-up sediment particles. Preferably, the holes and bolts are fitted relatively easily, for example, there is some play between the hole and bolt. Using a fastening bolt allows for simple and tool-free assembly and disassembly of the base element. By loosening the fastening bolt, the base element can be easily removed from the angle iron, thus providing easy access to the drainpipe.The fixing bolt preferably attaches the base element to the angle irons close to the second base element end so that the fixing bolt is easily accessible, for example from an elevated road through which the drain pipe is laid.

[0024] The pipe choke preferably further comprises at least one step, which is attached to the angle iron, preferably above the base element, and is easily accessible, for example from the raised road. The step can be welded to the angle iron and / or inserted into notches provided in the angle iron. The step makes it possible to stand on the mounting device, have good access to the pipe choke and / or the drainpipe, and have a secure hold, for example during assembly and disassembly of the base element or other work on the pipe choke and / or the drainpipe. Due to their good slip resistance and secure hold, step boards are preferably designed as or with metal grid element(s). To enable good access from, for example, the raised road, several step boards can also be arranged in a stepped manner to reach up to the road / top edge.Angle irons and running boards made of metal, for example steel, are preferably made and protected against rust, for example galvanized.

[0025] Furthermore, the mounting device can comprise precast concrete elements. If, for example, it is not possible to attach angle iron to the drainpipe because the drainpipe is made of thin-walled material such as corrugated iron, as is typically the case with large drainpipes with an inner diameter of 1000 mm or more, and / or for additional stability, precast concrete elements are preferably attached to the drainpipe. Angle iron can then be attached to the precast concrete elements, for example. Precast concrete elements provide additional stability and support, especially for thin-walled drainpipes. The precast concrete elements can thus serve as a stable foundation for the pipe choke. The precast concrete elements enable simple and inexpensive retrofitting of drainpipes, especially thin-walled ones, for the installation of a pipe choke.

[0026] To prevent the slope on / around the drainpipe from being washed away, paving can be provided, for example, or the slope can be covered with metal plates or a cover sheet. This is particularly preferred if the base element inside the pipe choke is in contact with the slope around the drainpipe.

[0027] The pipe choke is not limited to drain pipes with round cross-sections and can also be attached to other pipes, for example with rectangular cross-sections, bevelled and non-bevelled pipes, pipes with or without a slope head, or pipes of other sizes or made of other materials using the mounting device.

[0028] Preferably, the base element is attached to the pipe inlet of the drainpipe in such a way that water can only enter the drainpipe through the pipe throttle. In other words, the base element is preferably attached to the pipe inlet of a drainpipe in such a way that water passes through the pipe throttle before entering the drainpipe.

[0029] The base element casing preferably has a second base element inlet opening which is offset in height from the first base element inlet opening such that the second base element inlet opening is arranged closer to the second base element end than the first base element inlet opening, and wherein the opening cross-sections of the first base element inlet opening and the second base element inlet opening are, in total, smaller than the opening cross-section of the drain pipe. This means that, at a first low water level, a certain amount of water flows only through the first base element inlet opening into the drain pipe, but at a second high water level, an additional amount of water can flow through the second base element inlet opening into the drain pipe. The amount of water that can flow through the pipe throttle can thus be varied with the water level.If the water level in front of the pipe throttle is higher, more water per unit of time (maximum) can flow through the pipe throttle into the drain pipe to counteract a further increase in the water level.

[0030] Due to the staggered inlet openings of the pipe throttle, further damming of the water level in the upstream area can be delayed at higher water levels, as more water can then flow through additional inlet openings. This can gain time and delay the onset of a flood.

[0031] A sum of opening cross-sections or a sum of cross-sections of openings is understood to mean the sum of the areas of the opening cross-sections.

[0032] The disclosure is not limited to two base element inlet openings; further base element inlet openings may also be provided in addition to the first and second base element inlet openings, which are preferably arranged closer to the second base element end than the first base element inlet opening and / or whose opening cross-section, combined with the opening cross-section of the first and second base element inlet openings, is smaller than the opening cross-section of the drain pipe. If the sum of the cross-sections of all inlet openings of the pipe throttle is smaller than the opening cross-section of the drain pipe, the flow into the drain pipe through the inlet openings can be throttled, i.e., a smaller amount of water per unit of time can flow (at maximum) from the upstream landscape part through the inlet openings into the drain pipe when the pipe throttle is used, compared to when the pipe throttle were not used.This can lead to a buildup of water and / or a rising water level in the upstream landscape area, for example, during heavy rain. Preferably, the second base element inlet opening and / or further base element inlet openings are located at an angle offset from the pipe inlet of the drain pipe and particularly preferably on the same side surface of the base element casing as the first base element inlet opening.

[0033] Furthermore, the pipe throttle preferably has at least one top box, wherein the top box has a top box shell, a first top box end, and a second top box end, and the first top box end is mounted or mountable on the second base element end. It should be understood that an top box interior is formed by the top box shell or is delimited / enclosed by the top box shell.

[0034] The first top-mounted box end is preferably adapted to the second base element end in shape and size. This means that the first top-mounted box end preferably forms an opening identical to the base element overflow opening. The first top-mounted box end can preferably define an (open) flat surface / a plane. The first top-mounted box end can then be placed on the second base element end. The first top-mounted box end is preferably congruent with the second base element end, such that the top-mounted box can preferably be attached to the base element without offset. The first top-mounted box end can enable a positive connection or a plug-in connection with the second base element end, such that the top-mounted box can be attached / placed / stacked / mounted on the base element.

[0035] It should be understood that when the top box is mounted on the base element, the top box interior and the base element overflow opening are connected. Water can flow from the top box interior through the base element overflow opening into the drainpipe. In other words, the top box interior of a top box mounted on the base element and the base element interior together form a pipe restriction interior from which water can flow into the drainpipe.

[0036] The add-on box can have at least one first add-on box inlet opening. Water can flow into the add-on box interior through the add-on box inlet opening. This means that at a certain water level upstream of the pipe throttle, water can flow into the drain pipe through the add-on box inlet opening in addition to the base element inlet opening(s). The add-on box can preferably also have at least one further add-on box inlet opening, which is preferably offset in height from the first add-on box inlet opening. This means that at a first low water level, a certain amount of water flows into the drain pipe through the first add-on box inlet opening, but at a second high water level, an additional amount of water can flow into the drain pipe through the second add-on box inlet opening. The amount of water that can flow into the drain pipe thus varies with the water level.At higher water levels in front of the pipe throttle, more water per unit of time (maximum) can flow through the pipe throttle into the drain pipe to counteract a further increase in the water level.

[0037] The second end of the top box preferably forms a top box overflow opening. In other words, the top box overflow opening is an opening in the second end, or the second end defines the opening due to its shape. The top box overflow opening is designed to allow water to flow unthrottled into the interior of the top box and through the pipe throttle into the drainpipe. This means that the same amount of water per unit of time that can flow into the drainpipe without using the pipe throttle can also flow into the drainpipe when using the pipe throttle with the top box due to the top box overflow opening. In other words, the function of the top box overflow opening is designed to enable unthrottled flow from the upstream landscape section into the drainpipe.

[0038] Preferably, the top box overflow opening is identical in shape and size to the base element overflow opening and its positioning in the second top box end corresponds to the positioning of the base element overflow opening in the second base element end.

[0039] Additionally or alternatively, the second top-box end is preferably designed for attaching a further top-box that is separate from the base element and the top-box. This makes it possible to attach / place / stack / mount a further top-box onto the second top-box end of a top-box, preferably in that the first and second top-box ends of the top-boxes each define a flat surface / plane that allows the top-boxes to be placed one on top of the other. Alternatively, the first and second ends of the top-boxes can form a positive connection or plug-in connection with one another.

[0040] The pipe throttle can, for example, have a first and a second top box, wherein the first top box is mounted or mountable on the base element and wherein the second top box is mounted or mountable on the first top box. However, the pipe throttle is not limited to this, but can have a plurality of top boxes. The top boxes can preferably each have an equal distance from the first top box end to the second top box end or different distances and thus heights and can have top box inlet openings of the same or different size and in the same or different number in the same or different positions in the top box casing.The more top boxes the pipe throttle has and / or the greater the distance between the first top box end of a top box and the second top box end of the top box, in other words the higher a top box is, the higher water can be dammed / dammed in the upstream part of the landscape due to the pipe throttle.

[0041] The number and size of the pipe choke's inlet openings allow the amount of water flowing into the pipe choke to be adjusted (variably) depending on the height and amount during the impoundment process. The more water flows into the pipe choke (for example, when the water level rises), the longer the impoundment process takes. This means that the flood peak can be delayed for a certain time (through increased discharge). In other words, time can be gained (due to preferably offset inlet openings in addition to the first base element inlet opening) until the maximum amount of water flows unthrottled through the discharge pipe. Due to the modularity or modular design of the pipe choke, consisting of a base element and one or more add-on boxes, the overall height of the pipe choke can be adapted to the individual landscape conditions.Top boxes with heights of 125 mm, 250 mm, 500 mm and 1000 mm are preferred and are manufactured as standard with and without top box inlet openings of different sizes, with which pipe throttles can be individually adjusted in their overall height.

[0042] It should be understood that the interior of the top box of all top boxes mounted on the base element / all top boxes of the pipe throttle and the interior of the base element together form a pipe throttle interior from which water can flow into the drain pipe.

[0043] It is further understood that the overflow opening which is the greatest distance from the first base element end, or in other words, the overflow opening which represents a connection from the pipe throttle interior to the upstream landscape part, is the pipe throttle overflow opening and this pipe throttle overflow opening determines the maximum water accumulation height in front of the pipe throttle caused by the pipe throttle.In other words, this means that if, for example, two top boxes are mounted on a base element, the pipe throttle overflow opening is the top box overflow opening of the second top box and the overflow openings of the base element and the first top box serve to connect the base element interior with the first and second top box interior to form a pipe throttle interior, but do not, like the pipe throttle overflow opening, define the water level from which water can flow unthrottled through the pipe throttle into the drain pipe due to the pipe throttle overflow opening.

[0044] It should be understood that "unthrottled" means that the same amount of water per unit of time flows from the upstream landscape section into the drainpipe via the pipe throttle interior as would flow into the drainpipe without the pipe throttle. This is preferably achieved by ensuring that the opening cross-section of the pipe throttle overflow opening is no smaller than the opening cross-section of the drainpipe, or alternatively, by ensuring that the opening cross-section of the pipe throttle overflow opening, together with all opening cross-sections of the pipe throttle inlet openings, is larger than the opening cross-section of the drainpipe.

[0045] It should also be understood that overflow openings that do not constitute the pipe throttle overflow opening preferably do not throttle the flow either. This can be achieved by overflow openings that do not constitute the pipe throttle overflow opening being no smaller than the pipe throttle overflow opening in cross-section. Preferably, all overflow openings of the pipe throttle have the same opening cross-section, which is greater than or equal to the opening cross-section of the drain pipe. This makes production more cost-effective due to uniformity. Overflow openings are preferably the maximum possible size, i.e. equal to the cross-sectional area of ​​the pipe throttle interior, or in other words, first top box ends and second top box and base element ends preferably do not protrude into the pipe throttle interior, but are the axial ends of the respective shell. This utilizes the maximum possible size for overflow openings and saves material.

[0046] The sum of the cross-sections of the base element inlet opening(s) and the top box inlet opening(s) of the pipe throttle is preferably smaller than the opening cross-section of the drainpipe. The inlet openings of the pipe throttle are thus designed to throttle water, i.e. a smaller amount per unit of time can flow (maximum) from the upstream landscape section through the inlet openings into the drainpipe when the pipe throttle is used than if the pipe throttle were not used. This can lead to water backing up and / or a rising water level in the upstream landscape section, for example during heavy rainfall. It should be understood that due to height-offset inlet openings in the base element and / or top boxes, more water can flow into the drainpipe through more inlet openings when the water level upstream of the pipe throttle is correspondingly higher.A large number of inlet openings of the pipe throttle can also be advantageous, for example, if an inlet opening is blocked or its cross-section is reduced by flotsam, so that other inlet openings that are not blocked or whose cross-section is not reduced are still available.

[0047] Preferably, the top boxes of the pipe throttle can be attached / mounted and removed / disassembled on / from the base element of the pipe throttle and / or from each other without tools and without great effort due to positive connections or plug-in connections or simple stacking. This enables quick, easy, and cost-effective assembly or disassembly or variation of the number of top boxes of the pipe throttle, as well as easy maintenance and good accessibility to the drain pipe and / or the base element of the pipe throttle.

[0048] Top boxes can also be fastened to one another and / or to the base element, for example by screwing, in order to fix the top boxes on top of one another or on the base element, and / or to prevent accidental disassembly and / or for greater stability of the pipe choke. Preferably, the base element casing near the second base element end and top box casings near the first top box end and / or near the second top box end have through holes and / or threaded holes, with the aid of which the pipe choke can be mounted using screw connections or plug connections, for example with the aid of (dowel) pins or bolts. In addition, crane hangers can preferably also be suspended in through holes in order to be able to safely lift, remove or lift the base element and / or top boxes individually or stacked together. The through holes therefore preferably enable crane hangers to be suspended for assembly and disassembly.The add-on boxes can, for example, have mounting aids at the first end of the add-on box or near the first end of the add-on box, which can have through-holes (with or without threads). If an add-on box is stacked on the base element or another add-on box, the through-holes of the mounting aids of the add-on box preferably lie congruently on the through-holes or threaded holes of the base element or another add-on box, so that, for example, screws, (dowel) pins or bolts can be mounted through the through-holes and fasten the add-on box to the base element or the other add-on box. Such a preferred fastening method also enables quick, (if possible) tool-free assembly or disassembly. The mounting aids are preferably attached to the inside of the add-on box shell near the corners of the add-on box shell and are beveled at an angle of preferably 60 to 70 degrees.This simplifies installation because the top box, thanks to the beveled mounting aids, aligns itself when placed on top of another top box or a base element and slides onto the second end of the top box of the other top box or the second end of the base element. This then results in a precise fit of the top box and exact positioning of the through holes in the mounting aids. Through holes can be sealed during or after installation to prevent water from entering the pipe choke through the through holes when the pipe choke is in operation. However, this can also be omitted if the through holes have negligibly small cross-sections.

[0049] The pipe throttle can, particularly for flood retention basins, be provided with at least one sliding flap designed to set a maximum discharge volume and / or a maximum discharge opening cross-section from the pipe throttle and / or into a discharge pipe. The sliding flap is preferably permanently adjustable to various discharge opening cross-sections using a bolt lock. This enables simple operation and is cost-effective, in particular more cost-effective than concrete structures with thread-based rotary valves that are usually installed in flood retention basins. A scale can be attached to the pipe throttle, with the aid of which the discharge volume can be read and adjusted. The pipe throttle can be adapted to the respective opening cross-section of the pipe inlet of the discharge pipe and can have a base element discharge opening in the base element casing that corresponds in shape and size to the pipe inlet.The base element drain opening can then be attached to the pipe inlet so that water from the pipe throttle flows through the base element drain opening into the drain pipe and the maximum drain volume and / or the maximum drain opening cross-section can be adjusted using a sliding flap. The sliding flap can be adjusted to different positions / angles and, depending on the position / angle, can cover a certain part of the base element drain opening so that the maximum drain opening cross-section and / or a maximum drain volume can be varied. The sliding flap is preferably provided with a linkage which is designed so that the sliding flap can be operated even in the event of flooding or when the flood retention basin is full, i.e. so that the linkage preferably extends beyond the pipe throttle overflow opening. Likewise, the scale is preferably attached to the linkage and / or above the pipe throttle overflow opening.

[0050] Preferably, the base element and the top boxes are made of one material, preferably 10 mm thick steel plates, which are preferably rust-protected, for example, galvanized. Preferably, all components of the pipe throttle made of metal are rust-protected.

[0051] Furthermore, the pipe choke can be equipped with a debris rake. The debris rake is designed to catch debris and prevent it from entering the drainpipe and clogging or damaging it. According to the disclosure, the debris rake can be considered a component of the pipe choke. Alternatively, the debris rake can be considered a separate part from the pipe choke and, for example, together with the pipe choke, form the flood protection system according to the disclosure. In this case, the debris rake can be connected to the pipe choke. The debris rake is preferably easily accessible so that debris can be removed as easily as possible and / or the debris rake can be easily removed, for example for cleaning. As described above, add-on boxes can be removed from the base element quickly and easily, preferably without the need for tools.This allows for easy access to the interior of the base element and / or the debris rake. Preferably, a debris rake is mounted in a semicircle in front of the pipe choke in the upstream landscape section to catch debris before the inlet opening(s) and / or overflow opening(s) of the pipe choke (in particular the pipe choke overflow opening) and prevent them from clogging. A debris rake designed in this way preferably has vertical rods for catching debris, which can be, for example, iron pipes, wooden posts, PE or PP pipes and are attached to the pipe choke with horizontal retaining elements in the form of support rods. These stabilize the debris rake and can be easily removed from the pipe choke for removal of the debris rake, for example for cleaning work. The preferably vertical rods preferably extend beyond the pipe choke and can therefore end, for example, 50 mm higher than the pipe choke overflow opening.This ensures that when the water level is above the pipe throttle overflow opening, debris continues to be intercepted in front of the inlet openings and the pipe throttle overflow opening of the pipe throttle. Since the debris rake can shake the pipe throttle / exert a force on the pipe throttle when debris is intercepted (from the preferably vertical rods), the pipe throttle is preferably additionally attached to a mounting device, preferably to angle iron, with a support. In particular, when a debris rake is attached to an attachment box, the attachment box itself is preferably attached to a mounting device of the pipe throttle, preferably to angle iron, with a support, so that the attachment box is prevented from being pushed down by the base element or another attachment box, or from damaging / bending material.The preferably vertical poles of the debris rake can be placed on the ground of the adjacent landscape section or, for additional stability, driven into the ground of the adjacent landscape section or inserted into designated foundations, for example. For additional stability, the preferably vertical poles can be connected, for example, with poles as cross connectors. Short description of the characters

[0052] The disclosure is explained in more detail below using preferred embodiments and with reference to the attached figures. Fig. 1 shows a view of a drainpipe as a street through-flow pipe; Fig. 2 shows a schematic view of a pipe throttle according to the present disclosure in an embodiment for preferably thick-walled drain pipes; Fig. 3 shows a schematic view of an attachment box for a pipe choke according to the present disclosure; Fig. 4 shows a pipe choke according to the present disclosure in a side view; Fig. 5 shows a pipe choke with an attachment box in front view and illustrates the operation of the pipe choke according to the present disclosure; Fig. 6 shows a side view of a pipe choke according to the present disclosure in an embodiment for preferably thin-walled drain pipes; Fig. 7 shows the tube choke from Fig. 6 in the front view; Fig. 8 shows a pipe choke according to the present disclosure, wherein an angle iron serves as a holding device for a base element of the pipe choke; Fig. 9 shows how a base member of a pipe choke according to the present disclosure can be placed on and removed from an angle iron; Fig. 10 shows a pipe throttle preferably for flood retention basins according to the present disclosure with a sliding flap with which an outflow from the pipe throttle can be adjusted; Fig. 11 shows the tube choke from Fig. 10 with a sliding flap according to a preferred embodiment; Fig. 12 shows a pipe choke according to the present disclosure with a flotsam rake according to a preferred embodiment in side view; Fig. 13 shows the pipe throttle with flotsam rake from Fig. 12 in a schematic plan view.

[0053] The figures are schematic and serve only to facilitate understanding of the disclosure. The features of the various embodiments may be interchangeable. Detailed description of the preferred embodiments

[0054] Fig. 1 shows a pipe inlet 2 of a drainpipe 4 passing under a road 6. The drainpipe connects a first landscape section 8 on one side of the road 6 with a second landscape section 10 on the other side of the road 6.

[0055] Fig. 2 shows an embodiment of a flood protection system 12 according to the disclosure with a pipe throttle 14 and a drain pipe 4, as in Fig. 1, this embodiment being intended for preferably thick-walled drain pipes 4, which are usually made of concrete or reinforced concrete and have an inner diameter of approximately 300 mm to 1000 mm or more.

[0056] The pipe throttle 14 is attached to the drain pipe 4. The drain pipe 4 is provided here with a slope head 13, which is to be understood as part of the drain pipe 4, so that the drain pipe 4 is beveled. The pipe throttle 14 has a base element 16 with a base element shell 18, a first base element end 20, and a second base element end 22. The base element shell 18 extends between the first base element end 20 and the second base element end 22 and forms the first base element end 20 and the second base element end 22 at its axial ends. The base element shell 18 has a first base element inlet opening 24 and a height-offset second base element inlet opening 26. Through the base element inlet openings 24, 26, water from an upstream landscape part 8 can flow into a base element interior 28, which is partially enclosed / formed by the base element shell 18.A sum of the cross sections of the base element inlet openings 24, 26 is smaller than the opening cross section of the drain pipe 4.

[0057] The base element interior 28 is connected to the drain pipe 4 so that water can flow from the base element interior 28 into the drain pipe 4.

[0058] The second base element end 22 forms a base element overflow opening 30, which is designed to allow water to flow unthrottled from the upstream landscape part 8 into the base element interior 28 and further into the drain pipe 4. The base element overflow opening 30 is no smaller in cross-section than a pipe inlet 2 of the drain pipe 4.

[0059] The pipe throttle 14 is connected to the pipe inlet 2 by means of a mounting device 32. The mounting device 32 has two angle irons 34, to which the pipe throttle 14 is fastened with a fastening bolt 36. This simple method of fastening the pipe throttle 14 to the angle irons 34 with the fastening bolt 36 enables quick assembly and disassembly. By loosening the fastening bolt 36, the pipe throttle 14 can be quickly and easily removed from the angle irons 34. The angle irons 34 are mounted to the drainpipe 4 with screws and dowels 38. Two step boards 40 are welded to the angle irons 34, providing safe and stable footing for work on the pipe throttle 14 or the drainpipe 4 and are easily accessible from the street 6. The step boards 40 serve as steps and are made of metal gratings for non-slip footing.The base element 16 of the pipe throttle 14 has through holes 42, by means of which an attachment box 44 can be attached to the base element 16. The through holes 42 also serve for assembly and disassembly by hooking a crane sling. The second base element end 22 represents a flat surface so that an attachment box 44 can be attached thereto. In other words, an attachment box 44 can be stacked on the second base element end 22.

[0060] Fig. 3 shows such an attachment box 44 with a height L3=500 mm. The attachment box 44 has an attachment box shell 46, a first attachment box end 48, and a second attachment box end 50. The attachment box shell 46 extends between the first attachment box end 48 and the second attachment box end 50 and forms the first and second attachment box ends 48, 50 at its axial ends. The attachment box shell 46 has a first attachment box inlet opening 52 and a height-offset second attachment box inlet opening 54. Water can flow through the attachment box inlet openings 52, 54 into an attachment box interior 56 enclosed by the attachment box shell 46. The second attachment box end 50 forms an attachment box overflow opening 58 through which water can flow into the attachment box interior 56. The second top box end 50 is further designed for (optional) attachment of a further top box 44'.The first top box end 48 is adapted in shape and size to a second base element end 22. The first top box end 48 is configured to be mounted / placed congruently / without offset onto a second base element end 22. The top box 44 is provided with mounting aids 60, which have through holes 62 and are located at / near the first top box end 48. The assembly aids 60 are attached to the inside of the top box casing 46 and to corners of the top box casing 46 and are bevelled at an angle of 60 to 70 degrees, thus facilitating assembly and ensuring a precise fit of the top box 44 and the through holes 62. Further through holes 62 are located in the top box casing 46 near the second top box end 50. With the help of the through holes 62, the top box 44 can be fastened to a base element 16 or another top box 44'.In this case, two additional top boxes 44' with heights L1=125 mm and L2=250 mm are mounted on the top box 44. The through holes 62 allow for the attachment of crane slings for assembly and disassembly.

[0061] Fig. Figure 4 shows a side view of a flood protection system 12. It can be seen that a thick-walled drainpipe 4 is beveled without a slope head 13 and that a step board 40 is inserted into and supported by an angle iron 34.

[0062] Fig. 5 shows a flood protection system 12 as shown in Fig. 2 with a top box 44 as shown in Fig. 3 in the front view according to a preferred embodiment. The flood protection system 12 has a pipe throttle 14 with a base element 16 and an attachment box 44, as well as a drain pipe 4 with an embankment head 13, wherein the pipe throttle 14 is attached to the drain pipe 4. The base element 16 has a first base element inlet opening 24 and a second base element inlet opening 26. Water can flow into a base element interior 28 of the base element 16 through the first and second base element inlet openings 24, 26. The base element interior 28 is connected to a pipe inlet 2 of the drain pipe 4, so that water can flow from the base element interior 28 into the drain pipe 4. The top box 44 has a first top box inlet opening 52 and a second top box inlet opening 54 through which water can flow into a top box interior 56. The top box 44 is mounted on the base element 16.The first top box end 48 is adapted in shape and size to the second base element end 22. The top box interior 56 communicates with the base element interior 28, allowing water to flow from the top box interior 56 into the base element interior 28. In other words, the base element interior 28 and the top box interior 56 together form an entire pipe throttle interior 64, from which water can flow into the drain pipe 4. All base element inlet openings 24, 26 and top box inlet openings 52, 54 are, in total, smaller in cross-section than the pipe inlet 2 of the drain pipe 4. The pipe throttle 14 has a pipe throttle overflow opening 66, which corresponds to the top box overflow opening 58. The pipe throttle overflow opening 66 is designed to allow water to flow unthrottled into the pipe throttle interior 64 and further into the drain pipe 4.

[0063] The following describes the functioning of the flood protection system from Fig. 5. From a water level W1 in the upstream landscape section 8, water flows through the first base element inlet opening 24 into the pipe throttle interior 64 and into the pipe inlet 2 of the discharge pipe 4. The first base element inlet opening 24, like the pipe inlet 2, begins at the level of the water level W1. This means that at a water level W1 at which water would begin to flow from the upstream landscape section 8 into the discharge pipe 4 without the pipe throttle 14, water will also begin to flow into the discharge pipe 4 when the pipe throttle 14 is used / attached. The first base element inlet opening 24 is a dry weather discharge inlet opening. During dry weather, the water can flow out unthrottled through the pipe throttle 14. The pipe throttle 14 therefore has no influence on the water level and the discharge from the upstream landscape section 8 during dry periods.

[0064] The water level W2 indicates the (normal) dry weather runoff water level. In order to allow water to flow unthrottled, for example, during light rainfall or due to seasonal fluctuations, such as normal snowmelt, and to prevent this water from accumulating in the upstream landscape section 8, the first base element inlet opening 24 is formed above the water level W2 up to a height of a water level W3. This means that up to a water level W3, water from the upstream landscape section 8 flows unthrottled through the pipe throttle 14 into the drain pipe 4. In other words, the dry weather runoff opening has a throughput reserve, so that in addition to the (normal) dry weather runoff, for example, the same amount of water can flow unthrottled again.

[0065] The pipe inlet 2 of the drain pipe 4 has a (significantly) larger cross-section than the first base element inlet opening 24. From an (elevated) water level W3, for example, due to heavy rain or excessively rapid snowmelt, the water is throttled by the pipe throttle 14. From an (elevated) water level W3, the water begins to back up due to the pipe throttle 14. This can lead to a further increase in the water level.

[0066] From a water level W4, water can flow not only through the first base element inlet opening 24 but also through the second base element inlet opening 26 into the pipe throttle interior 64 and from there into the drain pipe 4. The first and second base element inlet openings 24, 26 are (significantly) smaller in cross-section than the pipe inlet 2 of the drain pipe 4. This means that the flow into the drain pipe 4 is throttled, but more water can flow into the drain pipe 4 per unit of time than just through the first base element inlet opening 24. Since the flow into the drain pipe 4 is throttled due to the pipe throttle 14, this can lead to a further increase in the water level.

[0067] From a water level W5, water can flow into the pipe throttle interior 64 / into the drain pipe 4 via the first top-mounted box inlet opening 52 in addition to the base element inlet openings 24, 26, in a throttled manner. Due to the additional flow through the first top-mounted box inlet opening 52, more water can flow out per unit of time than at a lower water level. Since the flow into the drain pipe 4 continues to be throttled due to the pipe throttle 14, this can continue to lead to a build-up of the water level due to the pipe throttle 14.

[0068] From a water level W6, water can flow into the pipe throttle interior 64 / into the drain pipe 4 via the second add-on box inlet opening 54 in addition to the base element inlet openings 24, 26 and the first add-on box inlet opening 52, in a throttled manner. Due to the additional flow through the second add-on box inlet opening 54, more water can flow out per unit of time than at a lower water level. This can counteract a further increase in the water level. Time can (possibly) be gained until a higher water level W7 is reached, thus the effective time of the pipe throttle 14 can be extended and a flood peak can be further delayed. Since the flow into the drain pipe 4 continues to be throttled due to the pipe throttle 14, this can continue to lead to a damming of the water level due to the pipe throttle 14.

[0069] From a water level W7, water flows not only through the inlet openings 24, 26, 52, 54, but also through the pipe throttle overflow opening 66 and thus unthrottled into the pipe throttle interior 64 / into the drain pipe 4. This means that, due to the pipe throttle overflow opening 66, from a water level W7 above the pipe throttle overflow opening 66, the same amount of water flows into the drain pipe 4 via the pipe throttle 14 as would flow into the drain pipe 4 without the pipe throttle 14. In other words, when the water level is above the pipe throttle overflow opening 66, the pipe throttle 14 does not contribute to any increase in the water level. This ensures that water backing up due to the pipe throttle 14 only occurs up to the level of the pipe throttle overflow opening 66.It is to be understood that the maximum water accumulation height in front of the pipe throttle / in the upstream landscape part 8 due to the pipe throttle 14 can be determined via the height of the pipe throttle overflow opening 66, and thus via the height or number of top boxes 44 on the base element 16.

[0070] Fig. 6 shows a side view of an alternative embodiment of a flood protection system 12 for preferably thin-walled drainpipes 4, which are usually made of corrugated sheet metal and have an inner diameter of over 1000 mm. Since the drainpipe 4 is thin-walled, angle irons 34 cannot be attached directly to the drainpipe 4. Therefore, a precast concrete element 68 is attached to a pipe inlet 2 of the drainpipe 4. The precast concrete element 68 thus represents a type of foundation for angle irons 34, which are mounted to the precast concrete element 68. A pipe throttle 14 with a base element 16 and an attachment box 44 is attached to the angle iron 34.

[0071] Fig. 7 shows the flood protection system 12 from Fig. 6 in the front view. The pipe throttle 14 with a base element 16 and an attachment box 44 is attached to the pipe inlet 2 by mounting the pipe throttle 14 on the angle iron 34, which is attached to the precast concrete element 68. The slope 69 between the angle iron 34 and the wall of the pipe inlet 2 of the drain pipe 4 is designed to be flush-proof.

[0072] Fig. Figure 8 shows a flood protection system 12 in which a base element 16 of a pipe choke 14 is attached to a drainpipe 4 with the aid of an angle iron 34. The base element 16 stands on the angle iron 34, to which an iron plate 72 is welded at its lower angle iron end 70 and acts as a holding device for the base element 16. The base element 16 is placed on / in the angle iron 34 and is held by the iron plate 72. The base element 16 is fastened to the angle iron 34 with a fastening bolt 36. The fastening bolt 36 is easily accessible from the street 6.

[0073] Fig. Figure 9 shows how a base element 16 can be placed on an angle iron 34, to which an iron plate 72 is welded at its lower angle iron end 70, for example to attach a pipe throttle 14 to a drain pipe 4, and shows how the base element 16 can be removed from the angle iron 34, for example for cleaning or maintenance work. The iron plate 72 is welded to the lower angle iron end 70 at an angle α of 60 to 70 degrees so that the base element 16 cannot be pushed out when installed / attached. For removal, the base element 16 can be tilted up after, if necessary, loosening a fastening bolt 36 that fastened the base element 16 to the angle iron 34. The base element 16 can thus be lifted out and removed from a drain pipe 4 in a simple and easily accessible manner.When attached, the base element 16 is placed on the iron plate 72 of the angle iron 34 and leaned against the angle iron 34.

[0074] Fig. 10 shows a pipe throttle 14 with a sliding flap 74. The pipe throttle 14 has a base element 16, which has a base element shell 18, a first base element end 20, and a second base element end 22, wherein the base element shell 18 has a first base element inlet opening 24 (not shown), and wherein the second base element end 22 forms a base element overflow opening 30 and / or is designed for attaching thereto an attachment box 44 separate from the base element 16. The base element 16 has a base element drain opening 76 in the base element shell 18. Water can drain from the pipe throttle 14 through the base element drain opening 76. A maximum drain volume and / or a maximum drain opening cross-section can be adjusted using the sliding flap 74.Depending on its position / angle, the sliding flap 74 can cover part of the base element drain opening 76, allowing the maximum drain opening cross-section and / or maximum drain volume to be varied. A bolt lock 78 can be used to permanently set the sliding flap 74 to a specific maximum drain opening cross-section and / or maximum drain volume. The respective maximum drain opening cross-section and / or the respective maximum drain volume can be set and read on a scale 80. The pipe throttle 14 further includes a debris rake 82.

[0075] Fig. 11 shows the pipe throttle 14 from Fig. 10, wherein the sliding flap 74 consists of Fig. 10 is modified so that it can be operated from above the pipe throttle 14. The sliding flap 74 is provided with a rod 84 which is designed to operate the sliding flap 74 from a location above the pipe throttle 14. In this case, the rod 84 projects beyond a second base element end 22 by a length L1=800 mm. The rod 84 makes it possible to operate the sliding flap 74 (from a dry location / conveniently) when the water level rises above the second base element end 22. For this purpose, the scale 80 and the bolt lock 78 are also attached to the rod 84 above the second base element end 22.

[0076] Fig. 12 shows a side view of a preferred embodiment of a flotsam rake 82. The flotsam rake 82 has rods 86 driven vertically into the ground, which are positioned in front of the pipe throttle 14. The rods 86 are higher than the pipe throttle 14 / the pipe throttle overflow opening 66 by a length L1 = 500 mm and are attached to a top box 44 of the pipe throttle 14 with support rods 88. For additional stability, the top box 44 is attached to angle iron 34 with a support 90.

[0077] Fig. 13 shows the pipe throttle 14 with the flotsam rake 82 from Fig.12 in a schematic plan view. The support 90 and the angle irons 34 are not shown. The individual rods 86 are arranged in a semicircle around the pipe throttle 14 at a distance L1 = 2 to 3 m, so that flotsam is intercepted by the flotsam screen 82 and inlet openings 24, 26, 52, 54 of the pipe throttle 14 are not blocked. For additional stability, individual rods 86 of the flotsam screen 82 are connected to one another with cross connectors 92. List of reference symbols 2 pipe inlet 4 drain pipe 6 Street 8 first / upstream / pipe inlet-side landscape part 10 second / downstream / pipe outlet-side landscape part 12 Flood protection system 13 Embankment head 14 Pipe choke 16 Basic element 18 Base element casing 20 first base element end 22 second base element end 24 first base element inlet opening 26 second base element inlet opening 28 Base element interior 30 Base element overflow opening 32 Mounting device 34 angle irons 36 fastening bolts 38 screw and dowel 40 Running board 42 through hole 44 top box 44' additional top box 46 Top box casing 48 first top box end 50 second top box end 52 first top box inlet opening 54 second top box inlet opening 56 Top box interior 58 Top box overflow opening 60 assembly aids 62 through hole 64 Pipe throttle interior 66 Pipe throttle overflow opening 68 precast concrete 69 washout-proof embankment 70 lower angle iron end 72 Iron plate 74 Sliding flap 76 Base element drain opening 78 Bolt lock 80 scale 82 flotsam rakes 84 rods 86 bars 88 support rods 90 supports 92 cross connectors

Claims

[1] Pipe throttle (14) for attachment to a pipe inlet (2) of a drain pipe (4) with a base element (16) which has a base element casing (18), a first base element end (20) and a second base element end (22), wherein the base element casing (18) has a first base element inlet opening (24), and wherein the second base element end (22) forms a base element overflow opening (30) and / or is designed for attachment thereto of an attachment box (44) which is separate from the base element (16). [2] Pipe throttle (14) according to claim 1, wherein the first base element inlet opening (24) is provided to allow water to flow from a landscape part (8) upstream of the pipe throttle (14) or on the pipe inlet side into the pipe throttle (14), in particular into a base element interior (28) delimited by the base element casing (18). [3] Pipe throttle (14) according to claim 1 or 2, wherein the first base element inlet opening (24) is a dry weather drainage inlet opening which is designed to allow water to flow unthrottled into the pipe throttle (14) during dry weather and / or the first base element inlet opening (24) is provided as a recess in the base element casing (18) at the first base element end (20). [4] Pipe throttle (14) according to one of claims 1 to 3, wherein the base element casing (18) has a base element drain opening (76) provided to allow water to drain from the pipe throttle (14), and / or the pipe throttle (14) has a sliding flap (74) by means of which a maximum discharge opening cross-section and / or a maximum discharge quantity from the pipe throttle (14) can be adjusted. [5] Pipe choke (14) according to one of claims 1 to 4, wherein the base element casing (18) has a second base element inlet opening (26) which allows water to flow from a landscape part (8) upstream of the pipe choke (14) or on the pipe inlet side into the pipe choke (14) and which is offset in height from the first base element inlet opening (24) so ​​that the second base element inlet opening (26) is arranged closer to the second base element end (22) than the first base element inlet opening (24). [6] Pipe throttle (14) according to one of claims 1 to 5, wherein the pipe throttle (14) has at least one top box (44) with a top box casing (46), a first top box end (48) and a second top box end (50), wherein the first top box end (48) is mounted or mountable on the second base element end (22) and / or wherein the second top box end (50) forms a top box overflow opening (58) and / or is designed for attaching thereto a further top box (44') separate from the base element (16) and the top box (44). [7] Pipe throttle (14) according to claim 6, wherein the top box (44) has at least one first top box inlet opening (52) to allow water to flow from a landscape part (8) upstream of the pipe throttle (14) or on the pipe inlet side into the pipe throttle (14), in particular into an top box interior (56) encompassed by the top box casing (46). [8] Pipe throttle (14) according to one of claims 1 to 7, wherein the pipe throttle (14) has a mounting device (32) which is provided to fasten the base element (16) of the pipe throttle (14) to a pipe inlet (2) of a drain pipe (4) and / or wherein the mounting device (32) has prefabricated concrete parts (68) which can be fastened to the drain pipe (4). [9] Pipe throttle (14) according to claim 8, wherein the mounting device (32) of the pipe throttle (14) comprises angle irons (34) which are intended to be fastened to the pipe inlet (2) of the drain pipe (4) or to prefabricated concrete parts (68) which can be fastened to the drain pipe (4), wherein the base element (16) of the pipe throttle (14) is attached or attachable to the angle irons (34), and / or at least one footboard (40) is attached to the angle iron (34), and / or the mounting device (32) has at least one fastening bolt (36) with which the base element (16) is or can be fastened to the angle iron (34). [10] Pipe throttle (14) according to one of claims 1 to 9, wherein the pipe throttle (14) is equipped with a flotsam rake (82) which is designed to prevent flotsam from reaching the inlet opening(s) and / or overflow opening(s) (24, 26, 30, 52, 54, 58, 66) of the pipe throttle (14) and / or into a drain pipe (4). [11] Flood protection system (12) with: a drain pipe (4) having a pipe inlet (2), a pipe throttle (14), preferably according to one of claims 1 to 10, which is attached to the pipe inlet (2) of the drain pipe (4), with a base element (16) which has a base element casing (18), a first base element end (20) and a second base element end (22), wherein the base element casing (16) has a first base element inlet opening (24) whose opening cross-section is smaller than an opening cross-section of the drain pipe (4), and wherein the second base element end (22) forms a base element overflow opening (30) and / or is designed for the attachment thereto of an attachment box (44) which is separate from the base element (16). [12] Flood protection system (12) according to claim 11, wherein a sum of the cross sections of the inlet openings (24, 26, 52, 54) of the pipe throttle (14) is smaller than the opening cross section of the drain pipe (4). [13] Flood protection system (12) according to claim 11 or 12, wherein a distance of the first base element inlet opening (24) from the second base element end (22) is greater than a distance of the pipe inlet (2) of the drain pipe (4) from the second base element end (22). [14] Use of a pipe throttle (14), preferably according to one of claims 1 to 10, in a flood protection system (12), preferably according to one of claims 11 to 13, in particular for attachment to a pipe inlet (2) of a drain pipe (4), wherein the pipe throttle (14) has a base element (16) which has a base element casing (18), a first base element end (20) and a second base element end (22), wherein the base element casing (16) has a first base element inlet opening (24) whose opening cross-section is smaller than an opening cross-section of the drain pipe (4), and wherein the second base element end (22) forms a base element overflow opening (30) and / or is designed for attachment thereto of an attachment box (44) which is separate from the base element (16). [15] Method for arranging, in particular retrofitting, a drain pipe (4) which has a pipe inlet (2), with a pipe throttle (14), preferably according to one of claims 1 to 10, which has a base element (16) which has a base element casing (18), a first base element end (20) and a second base element end (22), wherein the base element casing (16) has a first base element inlet opening (24) whose opening cross-section is smaller than an opening cross-section of the drain pipe (4), and wherein the second base element end (22) forms a base element overflow opening (30) and / or is designed for attaching thereto an attachment box (44) which is separate from the base element (16), comprising at least the step of: attaching the pipe throttle (14) to the pipe inlet (2) of the drain pipe (4).

Images