DE2122498A1 - - Google Patents

Description

21st

Patent attorneys Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr.K. Fincke D1PL.-ING. F. A.WeιCKMANN, Dipl.-Chem. B. Huber

8 MUNICH 86, POST BOX 860 820

SAHA MÖHLSTRASSE 22, NUMBER 48 3921/22

<983921/22>

COlTCO INC., South Hth Avenue, Mendota, Illinois, V.St.A.

Hydraulic pipe cleaner

The invention is directed to a hydraulic pipe cleaner that is jet-driven and mounted on a skid frame is mounted. The cleaner according to the invention is primarily for cleaning and rinsing sewer pipes in which there is an easy build-up of roots and other organic or inorganic matter The invention can also be used for other purposes and a pipe cleaner according to the invention can be used for Can be used with or without modification to clean all possible pipelines, e.g. for oil pipelines, where it is important to remove paraffin deposits

The pipeline cleaner of the invention is intended for use in conjunction with a trolley that houses a water tank and a pump that ^{delivers water at a pressure of about 70 kg / cm 2} (1000 psi). The pump is operated by a motor mounted on a vehicle and is connected to a pressure hose that is rolled up on a drum. The cleaner is attached to the outlet end of the pressure hose. The pressure hose has sufficient tensile strength so that the cleaner can pull it out of the cleaned pipeline against the thrust of its jet propulsion system.

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tion can be withdrawn »to the material that is has loosened in the pipeline during the forward movement of the cleaner »flush out · The invention is not limited to such a portable arrangement. Rather, the pipeline cleaner can use his jet propulsion and his Obtain flushing effect also from a water hydrant · However, the essential features of the invention remain unaffected the special application and the origin of the water used or another source of liquid unchanged ·

The invention essentially provides a pipeline cleaner which has a composite housing with a whose motor part and a rear nozzle drive part, which are screwed together, has «The rear nozzle drive part is provided with a pressure chamber inside which is connected to the outlet end of the associated pressure hose and pressurized water to a series of high pressure ·· The jet nozzles are directed backwards and are located at the far rear end of the cleaner, so that the forward thrust developed by the rays is unhindered and its propulsion effect is not is braked · The front motor part of the assembled housing of the cleaner contains a conventional hydraulic motor and is provided with an inlet and an outlet for the control fluid «The inside of the rear nozzle drive part located pressure chamber is provided with an outlet for the motor feed line, the through a short Rohrstüok is connected to the engine inlet The short pipe * piece represents "a motor feed line, while the off" Let the motor be provided with a connection piece designed as a knee, which has an additional low-pressure jet nozzle If this connection piece is turned in such a way that it directs its jet of water backwards, it intensifies the jet effect to a certain extent of the above-mentioned high-pressure jet nozzles what the sawn

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Thrust of the cleaner concerns. If the socket is turned so that its water jet is directed forward, you get a in the sewer pipe in front of the cleaner Pre-rinse effect, because of the low speed of the additional water jet, the braking effect is only slight and the forward speed of the cleaner is not is measurably reduced «. The reduced pressure of the water jet emerging from the connection piece results from the net power of the motor, which has a rotating knife at its front end. The additional beam is namely formed by the pressure of the water in the outlet leading away from the engine

Another feature of the pipeline cleaner according to the invention is based on the choice of a hydraulic motor that does without a regulating or reducing nozzle in order to prevent excessive motor speeds. At previously known :. Pipeline cleaners, which served the same purpose as the device according to the invention, have shown that in turbine-driven motors or ¹¹ blower jet motors to drive the root knife, the full line pressure at the motor inlet leads to excessive motor speeds and thus damage to the knife, the motor bearings and others It has therefore hitherto been common practice to use a regulating nozzle to dampen the hydraulic motor. But the use of such a regulating nozzle has not been entirely satisfactory since a low motor input pressure also results in a low torque. The present invention addresses this Problem of engine damping with consequent loss of torque and generating high blade torque at safe overall engine speeds. To achieve this goal, a wise choice of engine is made.

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Like motors with blades and blower jets are peculiar to, do not stand when using a gerotor type motor · Gerotors are currently widely used in the industry and are used by numerous companies in various forms and sizes made. A gerotor motor or a gerotor pump essentially consists of two elements, namely an inner gear-like driving rotor and an outer gear-like driven one Rotor that meshes with the former and has more teeth k than the former rotor · gerotors became mainly from W. Ho Nichols Company, Waltham, Massachusetts, developed. Another manufacturer of such hydraulic pumps is GuIf Research and Development Co., Pittsburgh, Pennsylvania. This company markets a pump known as the "Pigotf" pump, which is based on the gerotor principle used. It has now been found that when using a gerotor pump as a motor instead of a pump, i.e. by means of a supply line the pressure fluid into the connection normally used as the pump outlet, the inner rotor at each inlet pressure is driven at constant speed and with high torque. When using such a motor for With the pipe cleaner according to the invention there is therefore no problem of excessive motor and blade speeds more ο

The invention thus uses a hydraulic motor of a previously known type, but it is useful of such a motor for the purposes of the invention improved results in connection with a pipe cleaner, which will be better understood in the course of the more detailed explanation of the invention.

In addition, the invention provides a novel and extremely useful cage-like skid frame for the pipe cleaner which surrounds the assembled housing and is firmly attached to the unit by means of a split clamping ring

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housing is connected. The device according to the invention draws sioh is characterized by a new and compact arrangement of the parts.

Further details of the invention can be found in the following detailed description of an exemplary embodiment based on the attached drawings ο It shows:

Pig ·! a side view in elevation and partly in longitudinal direction, which shows a pipeline cleaner according to the invention for a sewer pipe on which a water Is the supply hose connected?

Fig.2 is a front view of the pipeline cleaner of Pig.1l

! ig.3 a rear view of the pipe cleaner Pig. 4 a view from below of the pipe cleaner

and

Pig.5 some sketches showing the working principle of a gerotor with an inner and an outer rotor showing a rope of the hydraulic motor for the pipe cleaner represents and belongs to the invention

As shown in FIGS. 1 to 4, the inventive Pipeline cleaner for a sewer pipe in its general design a composite housing, the one front engine part, generally designated 10, and a rear nozzle drive part 12 comprises. The front engine part of the assembled housing is in turn reassembled, as will be described in more detail, and represents a commercially available unit on which minor changes have been made to make them suitable for the intended purpose within the scope of the invention, see below maohen · The front motor part 10 represents the housing of a complete hydraulic motor M, which is followed by a

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provided at the front projecting drive shaft 14 for the knife is. An assortment of accessories can be attached to the shaft for example, a helical, saw-blade-like root knife 16 as shown in Figure 1, or any of the numerous conventional pipeline flushing heads. The root knife 16 is provided on its middle part with a hub 18 which telescopes over the drive shaft 14 and is firmly connected to this by a wedge 20. Grub screws 22 secure the wedge 20 against a shift "

The tealight parts 10 and 12 aa housing are surrounded by a cage-like runner frame 24., Üaa of three longitudinally si eil © rstreekenci en Ks £ es 26, which are arranged in uniform atostänäesi 2? Üiid around "the sasasiasiige G-ehäuse! * aai setöflg nasJä © inwardly running ends 28 habes ₀ m & <2 @ a Surshgang äes Heinigers through a canal «r © fes? aaofe. selien sight-imgsa to facilitate» The runners 26 consist of seo ctG ^ Ires, stasroü rods, and become of radialan Strefe © a 33 in their position gehalten® DIE struts are to 3n with your änB © T <stalls. atwater the runners in the middle angesehw © iS and with IHRSA inner ends of a split clamp 32 »latter iIAT after auSen- curved ends 34 dursh which a clamping screw ait Mutts? 36 is plugged "When this wirä attracted _s is the Kiemsring on the front · * whose Motortäd.l 10 of the composite housing !! tightened"

The two ropes 10 and 12 have a housing, by and large and the whole Ejlindrisohe form, cUh * they have continuous Circular cross-shape with the exception of a raised, flattened one Area 40 and a rectangular screw flange 41, which are provided on the front engine part 10 · The flattened Area is bordered and forms an engine inlet 42 (see Hgo4} and an engine outlet '44 · In äem engine inlet

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ORJQiMAl. fNSPECTED

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42 is a pipe elbow screwed in as a connecting piece 46
A jet nozzle 48, likewise shaped as a connecting elbow, is screwed into the motor outlet 44, its puncture
will be explained in more detail o

The rear nozzle drive portion 12 of the assembled housing is provided with a front circular connection flange 50
(see Pig. 1), the one at the rear of the front
Motor part 10 is fixed by means of a ring of spaced clamping screws 52. The end face of the nozzle drive is steeply provided with a depression 54 in
which receives a guide pin 55 which is formed on the rear end surface of the front motor part 10 of the housing. In the central area, the rear nozzle drive part has a forwardly tapering frustoconical section 56, which has clearance for insertion
or removing the clamping screws 52 creates a fairly deep axial bore 58 in the rear end of the nozzle drive part 12 of the assembled housing,
the one pressure chamber 60 for a pressure medium (water under
Pressure) forms, as will be described below. The rear end of the bore 58 is threaded into which a
End of a coupling piece 62 which is connected to the outlet end of a water hose, not shown
outside and behind running jet channels 64 traversed, which direct a series of water jets outwards and backwards into the sewer pipe to be cleaned in order to move the cleaner forwards when it is in operation

The pressure chamber 60 is with one in the lateral direction
extending outlet 70 is provided for the pressure fluid, into which a connecting elbow 72 is screwed,

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ORiGlNAL INSPECTED

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which is connected to the connection piece 46 via a pipe section 74. This piece of pipe represents a liquid line between bore 58 and engine inlet 42 · If that is, pressurized water is introduced into the pressure chamber 60 through the hose mentioned, practically the full lei * flow pressure of the water is applied to the jet channels 64, while the same water pressure is applied to the hydraulic motor M is directed to actuate this and to set the knife 16 in rotation · This only creates one slight pressure reduction of the water in the chamber 60, which originates from the discharge to the motor M

As already mentioned, the engine M including the front engine part 10 is a commercially available device, one of the basic components of the pipe cleaner according to the invention forms. In order to complete the pipeline cleaner, you only have to work on this device the rear nozzle drive part 12, the skid frame 24, the Root knife 16, the pipe section 74 and the knee-shaped jet nozzle 48 are added for the device according to the invention specially selected motor provides adequate torque over a wide range of input pressures and at full line pressure, which is approximately 70 kg / cm (1000 psi) start speeds are acceptable for the pipe cleaner to function properly not exceeded, so that control valves or nozzles are superfluous

The motor M is a gerotor, as it has been known for many years and is widespread in industry.Such a motor, which has proven extremely useful for the invention, is described by the Ghar ~ I Company of Eden Prairie, Minnesota and sold under the name ¹¹ OHAR-LYNN ¹ *. It bears the designation model (AC) · The functional principle of the "CHAR-IYNN ' ¹ -Gerotor-

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CRfGfWAL

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Motors is detailed in a publication by W. Ho Nichols Company of Waltham, Massachusetts, number 69 and entitled: "Gerotor Standards Including Stock Gerotors ^11. The motor as such is therefore not claimed to be new. Also, the internal gear arrangement of a gerotor not described in detail the operation of the motor M, however, in Figure 5 illustrates schematisoh _e

-The motor part 10 consists of the assembled housing from a number of coaxial annular sections, which includes a main portion 80 on which the aforementioned flattened area 40 is formed this main section is provided with a narrower part 82, so that a rearwardly directed step 84 is formed, against which the split clamping ring 32 was placed with its end face Passage section 86, a middle section 88 for the gerotor rotors, and a rear end plate 90 formed · The only modification made to the original gerotor motor M as it is on the market is ·· was to remove the original clamping screws and replace them with the clamping screws 52, which are sufficient are long to the connecting flange 50 of the rear nozzle drive part 12 screw tight to the motor part 10 to be able to

The functional principle of the gerotor section 88 is indicated schematically in FIG. 5, in which the details of a gerotor motor with a tooth ratio of 5: 4 are shown. In all gerotors there is an outer "gear" and an inner "gear" and the inner gear always has fewer teeth than the outer gear. In Fig. 5, the outer gear (which consists of section 88) is provided with five inner "teeth ¹¹ , while the inner gear 88a has four" ^{outer "teeth 11.} The outer gear is stationary, there

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it is part of the front engine part 10 of the housing iatο The inner gear 88a, on the other hand, rotates · The volume of the "missing tooth" multiplied by the number of drive teeth determines this with each revolution of the inner gear 88a displaced liquid volume. When you see the inner gear 88a in the direction indicated by the arrows in Fig. 5 rotates direction indicated, the chamber is between the teeth of the inner and outer gears gradually larger during about 180 ° of each revolution until they reach their reached maximum size corresponding to the full volume of the "missing tooth" during this first half-period the gradually expanding chamber is open to inlet 42a (which communicates with engine inlet 42 via passage section 86). During the second phase the 180 ° rotation gradually increases the volume of the chamber while the teeth comb and the fluid through the AualaB 44a, which is via the passage section communicates with the engine outlet 44, flows away. Such fluid passage through the gerotor gears exerts a substantially tangential torque on the internal gear 88a, which via a central shaft 14a is connected to the motor output shaft 14

To operate the Eohrleitungsreinigera described, the assembled Heiniger is at the outlet end of a pressure hose attached, as already described, and then into the sewer pipe or another pipe to be cleaned used · Of course, it is on the motor output shaft 14 the appropriate tool for the intended use attached · As soon as the valve of the water supply line is open the rear nozzle drive part of the assembled housing pushes the Heiniger forward, at the same time the motor M is set in motion to the root mesa 16 or to turn any other tool that sits on the output shaft 14 of the motor · Any obstacles in

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of the pipeline are chopped up by the rapidly rotating root knife, while at the same time the saw teeth on the Root knives scrape off the wall of the pipeline and de-encrust it · The forward movement of the cleaner in the pipeline is of course due to the action of the water jets emerging from the jet channels 64 ·· This advance is also reduced by the under Pressure from the curved additional jet nozzle 48 supports the exiting water jet, if this jet nozzle after ' is directed backwards

The water supply hose is wound on a drum which, together with the pump, is on the service trolley is housed so that in the event of an overload with subsequent throttling of the engine at the same time as stopping of the cleaner is pulled back a little by turning the drum and then released again can be so that it regains its torque. When the cleaner through the whole stirring lextuji «; has run, can Any remaining hate that has not been rinsed out can be removed by turning the cleaner backwards pulls while the motor M remains in operation, whereby the pipeline is completely flushed out

If the pipeline is dry or if the pipe walls are likely to be encrusted, it can be useful to use the curved jet nozzle 48 to rotate through an angle of 180 ° so that it directs its jet forwards · With such a In the position of the nozzle, a jet of water is thrown quite a distance in front of the cleaner during this runs through the drill pipe but this has little effect on the entire Sohubkraftentwioklung, since the jet pressure, that of. the nozzle 48 is generated, is noticeably smaller than the combined strength of the rearward ones

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-.1

ORIGINAL INSPECTED

Beam channels 64 exiting rays. The reason for this is the pressure drop, which is related to the work performance of the Motor M is connected

The invention is not limited to the precise arrangement of the parts as illustrated in the drawings and described above _p Rather, the invention numerous variations are possible within the scope to the details of construction

1 0 9 8 5 Q / 1 0 9 8

ORIGINAL

Claims (1)

2122438 - 13 - Expectations Hydraulic pipe cleaner, thereby marked, that the housing of the cleaner consists of a motor part (10) on which a motor inlet (42) and a motor outlet (44) are formed and in which a hydraulic motor (M) with cooperating G-erοtor gears (88, 88a) is housed, the output shaft (14) protrudes forward from the engine part and a cleaning tool (16) carries, and a nozzle drive part (12) together « is set, which is attached to the rear end of the engine part and in which a blind hole (58) is sunk is used to connect the outlet end of a pressure hose is formed, with which the interior (60) of the bore is in communication, and in the wall of a row of jet channels (64) are formed which generate backward-directed Plüssigkeitsstrahl, that further a cage-like skid frame (24) surrounds the motor part (10) and the nozzle drive part (12), which in the longitudinal direction extending skids (28), and that a fluid line (70, 72, 74, 46) the blind bore (58) connects to the engine inlet (42). Hydraulic pipe cleaner according to claim 1, since characterized in that the skids (28) are spaced around the two housing parts (10, 12) are arranged, extend approximately in the same direction and over the entire length of the two housing parts and in their spaced arrangement from a split Clamping ring (32) are held, which is shrunk onto the motor part (10) of the housing and on which for each Skid a radial strut (30) is attached. Hydraulic pipe cleaner according to claim 2, because « characterized in that on the motor part (10) of the housing 109850/1098 21224S8 -H- Ses a narrower portion (82) is formed which forms a rearward step (84) against which the split clamping ring (52) is applied. 4β Hydraulic pipe cleaner according to one of the preceding Claims »characterized in that the fluid line has two drill elbows as connection pieces (72, 46), of which one (72) in the nozzle drive part (12) and the other (46) in the motor part (10), the latter with the engine inlet 42 and the former with the blind bore (58) in Connection and the two pipe bends are connected to one another by a pipe section (74) β Hydraulic pipe cleaner according to claim 4 »characterized by a further connection elbow (48) which is screwed into the motor part (10) of the housing and communicating with the engine outlet (44) and defining an auxiliary jet nozzle extending over an angle of Can be rotated 180 ° so that the beam emerging from it can optionally be directed backwards to the To increase the thrust of the jets emerging from the jet channels (64), or to the front to create a liquid «· the jet of water to the front in front of the motor part (10) for the purpose of rinsing out 6. Hydraulic pipe cleaner according to claim 5, characterized in that the nozzle drive part (12) is provided in the area of its front end with a radial connection flange (50) through which the clamping screws (52) pass, with which the nozzle drive part is attached to the motor part , and that the nozzle driving portion mig tapered in its central region to the front truncated cone ", such that the clamping screws are accessible β 109850/1098 ORIGINAL INSPECTED Blank page