FI129660B - Centering method and centering device - Google Patents

Abstract

The invention relates to a centering method for centering tools inside pipes. The invention is characterized in that in the centering method one or more non-rotating centerers (1) are arranged around an elastic drive shaft (2), the drive shaft (2) being centered inside the tube. One or more intermediate pipes (3) are arranged on the drive shaft (2) on one side or both sides of the center (1). The centerer (1) remains on the intermediate tube in the longitudinal direction of the drive shaft (2) even when the drive shaft (2) moves in the longitudinal direction of the tube. One or more bearings (9) at one end or at both ends of the intermediate tube (s) (3) enable the center (1) not to rotate inside the tube when the drive shaft (2) is moved in the longitudinal direction of the tube.

Description

The present invention relates to a centering method according to the preamble of appended claim 1 for use in centering tools inside pipes - inside pipes.

FIELD OF THE INVENTION The pipes are coated on the inside with various liquid treatment agents known, such as paint, fiberglass and their hardeners. The tubes are cleaned on the inside with liquid treatment agents, such as water, various known cleaning agents and disinfectants. Sewer pipes are renewed by coating them with known coating methods, such as stocking and molding new pipes into the old pipes with durable glass-reinforced polyester plastic or epoxy resin. It is known e.g. SPS - Socks, it has a VTT certificate, according to which the service life of a socks is 40-50 years. Certificate number: VTT-C-9376-13. In addition to coating the inside of the tubes, the tubes are washed and disinfected from the inside. Before the sewer pipes are stocked, the pipes must be cleaned, preferably with chain cleaners rotated with a wire covered with a non-rotating shell from which the wire can be pushed into the drain by hand and pulled out of the drain. Nowadays, it is known to use, for example, a three-wheel hub to prevent unnecessary oscillation of the wire and its shell during work.

BACKGROUND OF THE INVENTION "Current three-wheel hubs are ill-suited for guiding the inner wire and shell of S 25 drains with sharp bends due to the tendency of the wheels to catch the bends. In addition, the wheel hubs are heavy, making cleaning work difficult.

T E KR 101030055 BI is known for cleaning pipes. The removal of existing tubes is known from US 2006099035 A1. F1 10286 U1 is known for fastening the drive shaft protection tube S.

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OBJECT OF THE INVENTION It is intended that the drive shaft be centered inside the tube.

The above drawbacks can be eliminated and the above-mentioned objects are achieved by a centralization method characterized by what is defined in the characterizing part of claim 1, and preferred embodiments of the method are the subject of claims 2 to 4. The concentrating device is characterized by what is defined in the characterizing part of claim 5, and preferred embodiments of the device are the subject of claims 6 to 15. The main advantages of the invention are that the hub invented concentrates the drive shaft inside a well-operated pipe. The hub is light and durable. The hub can be - preferably made of plastic by a known method by molding, or by injection molding, or by another known manufacturing method. Placing the hub on the drive shaft is quick and easy. Cleaning the hub is easy and quick by washing with a suitable liquid or brushing clean. The use of a hub saves considerable savings in the internal machining of the pipes.

The invention will now be described in more detail with reference to the accompanying drawings, in which: Figure 1 shows a bearing according to the invention which prevents rotation of a hub Fig. 2 shows the bearing and the hub of Fig. 1 seen perpendicularly from the side, Fig. 3 shows the hub of Figs. 25 is a side view, N Fig. 6 shows the hub of Figs. combine a single fastener, the hub is longitudinally grooved on the outer surface, viewed obliquely = 30, N Fig. 8 shows the two hubs of Figs. 1 to 6 on the drive shaft between the intermediate tubes, front view, Fig. 9 shows the concentrators of Fig. 8 perpendicular to the side, Fig. 10 shows the concentrator of Figs. 1 to 6 and 8 to 9 in section, perpendicular to the side,

Fig. 11 shows the center of Figs. 1 to 6 and 8 to 9 in section, perpendicular to the side, Fig. 12 shows the center of Figs. the tool of Figures 1 to 9 and the brush attached thereto are viewed from the side, Figure 15 shows a fourth hub cut perpendicular to the side, Figure 16 shows another bearing according to the invention perpendicular to the end face, Figure 17 shows the bearing of Figure 16 seen perpendicularly, Fig. 18 is an exploded view of the bearing of Fig. 17; Fig. 19 is a side elevational view of a third bearing of the present invention; Fig. 20 is an elevational view of the bearing of Fig. 19; Fig. 21 is a side elevational view of the bearing of Fig. 2.

The invention and related parts shown in the present figures are schematic illustrating the basic structure and operation of the preferred embodiment of the invention and its parts. - The figures show the following sections and sections. Hub 1 with an outer diameter / outer circumference of 20-25% smaller than the inner diameter of the tube. x The body 1a of the hub 1 has an outer circumference laa, a front end lab, a rear end Lac, a middle diameter lad, S 25 - length Lae, a central hole laf and a central part lag. > The front end of the lab is the diameter of the blade and the front end recess depth of the labb. © At the rear end Lac is the diameter laca and the rear recess depth lacb. I The front end recess depth labb and the rear end recess depth lacb are most preferably of the same length E, so that the drive shaft 2 is able to bend in the same way at the front end 1ab = 30 of the body as at the rear end Lac. The dimension of the front access recess depth labb and the rear access recess depth S lacb is most preferably 45 to 25 percent of the total length Lae of the body. N The average diameter lad is the largest diameter of the body 1a, it is located in the longitudinal central part of the body 1 lag.

The body 1a has a length Lae. The length Lae is preferably equal to or less than the diameter of the largest diameter of the body la. The largest diameter of the body la is the lad of the mean diameter.

The middle hole 1af has a front diameter lafa, a rear diameter 1afb, a shoulder lafc. The central hole laf is - in the longitudinal direction of the body 1a in the middle part lag with the smallest diameter, the diameter of the middle hole laf increases on both sides of the middle part lag, due to which the drive shaft 2 can bend well inside the body 1a. Figure 13 shows a side view of an hourglass-shaped central hole laf. In the other figures, the central hole laf is conical at one end perpendicular to the side of the body la and rectangular at the other end. A central bearing 6 is inserted inside the body 1a from the rectangular end.

The hull la has a longitudinal central lag. The central part length lafd in the body 1a is 10 to 30 percent of the total length of the body 1a of the concentrator 1.

The drive shaft 2 is best known as a cross-braided wire. The drive shaft is most commonly rotated with a cordless drill or other known rotator. - The intermediate tube 3 is a flexible tube such as a plastic tube or a rubber tube. The intermediate tube has a head 3a. At one or both ends 3a of the intermediate tube 3 there is a thrust bearing 9, which may be a known plain bearing or a known ball or roller bearing. "The tool 4 is a chain race or a hole drill or a camera or other similar tool required for the socking of sewer pipes. 3 The tool 4 brush 4a is fixed to the tool 4 and the brush 4a rotates with the tool. 4aa z Coupling bracket 5 for connecting the drive shaft 2 to a rotating shaft with a non-rotating shell, which is preferably a wire rotated by a transmission device S such as a cordless drill or other known rotating device.

N The central bearing 6 can be a ball or roller bearing.

An inner locking ring 7 with which the central bearing 6 is locked in place in the central hole laf of the hub 1, in the middle of the length Lae of the hub 1. That is, the central bearing 6 is longitudinally and radially in the center of the hub 1 as shown in the figures, but in contrast to the figures the central bearing 6 may be closer to the front lab or rear end Lac depending on the tool 5 and the pipe diameter within which the tool 4 is worked. Inner locking ring groove 7a. The figures show that inside the central bearing 6 there is a sleeve 8 in its central hole with a hole 8a for the drive shaft 2. In the figures the hole 8a is loose, i.e. larger than the outer diameter of the drive shaft 2, so that the drive shaft 2 can also bend at the sleeve 8. The purpose of the above construction is that on the straight part of the tube the drive shaft 2 rotates freely without touching the sleeve 8, whereby the central bearing 6 also does not rotate, in the bend of the pipe the drive shaft 2 contacts the sleeve 8, whereby the central bearing 6 rotates

Bearing 9 which is a thrust bearing 9a or a ball bearing 9b or a plain bearing 9c or a roller bearing. An inner sleeve 9e is provided in the rotating inner ring 9d of the bearing, with an end surface 9ea (end surface) which is against a rotating surface such as a tool 4 or against a non-rotating surface such as the body 1a of the hub 1. - The inner sleeve 9e is attached to the inner circumference 9d of the bearing by a compression fitting, whereby the inner sleeve 9e rotates the inner circumference 9d of the bearing. The outer sleeve 9f can be fixed to the end 3a of the intermediate tube 3 by one or more hexagon socket screws 9fa which prevent the outer sleeve 9f from rotating on the intermediate tube 3. Preferably, the outer sleeve 9f is attached to the spacer tube 3 by a friction fit. the inner diameter 9fd of the hole is such that the intermediate tube 3 fits inside the fastening part 9fb N by gripping the fastening part 9fb, said hexagonal screw 9fa or a known adhesive can be used for fastening = 30 -

S A centering method has now been invented for centering equipment, for use in centering tools inside pipes.

The figures show a centering method in which one or more non-rotating hubs 1 are around a flexible drive shaft 2, the drive shaft 2 being centered inside the tube, one or more intermediate tubes 3 on one or both sides of the hub 1 holding the hub 1 in place in the longitudinal direction of the drive shaft 2 even when the drive shaft 2 moves in the longitudinal direction of the tube, one or more bearings 9 have one or more bearings 9 at one or both ends of the intermediate tube (s) to allow rotation of the hub 1 inside the tube.

- According to an inventive embodiment, the bearing 9 consists of one or more thrust bearings 9a attached to one or both ends 3a of the intermediate tube 3 and the bearing is around the drive shaft 2, the bearing 9 eliminates the rotational friction of the end 3a of the intermediate tube 3 the longitudinal movement of the tube of the drive shaft 2 and at the same time tending to rotate the hub 1 via the intermediate tube 3.

According to an inventive embodiment, the bearing 9 consists of one or more ball bearings 9b or a roller bearing attached to one or both ends 3a of the intermediate tube 3 and the bearing is around the drive shaft 2, the bearing 9 eliminates the rotational friction of the intermediate tube 4 resisting the longitudinal movement of the tube of the drive shaft 2 and at the same time tending to rotate the hub 1 via the intermediate tube 3.

"According to an inventive embodiment, the bearing 9 consists of one or more plain bearings 9c attached to one or both ends 3a 3 of the intermediate tube 3 and the bearing is around the drive shaft 2, the bearing 9 eliminates the rotational friction of the end 3a of the intermediate tube 3 is caused by the rotating tool 4 resisting the longitudinal movement of the tube of the drive shaft 2 and at the same time tending to rotate the hub 1 via the intermediate tube 3.

= 30 S According to an inventive embodiment, the device is formed, one or more non-rotating hubs 1 are around a flexible drive shaft 2, the drive shaft 2 being centered inside the tube, on one or both sides of the hub 1 the drive shaft 2 has one or more intermediate tubes 3 with a hub 1 remains in place along the length of the drive shaft 2

in the direction even when the drive shaft 2 moves in the longitudinal direction of the tube, there is one or more bearings 9 at one or both ends of the intermediate tube (s) 3. According to an inventive embodiment, the bearing 9 consists of one or more thrust bearings 9a. According to an inventive embodiment, the bearing 9 consists of one or more ball bearings 9b or roller bearings.

- According to an inventive embodiment, the bearing 9 consists of one or more plain bearings 9c.

According to an inventive embodiment, the inner circumference 9d of the bearing 9 has an outer sleeve 9e of circular outer and inner diameter with an end face 9ea.

According to an inventive embodiment, the inner sleeve 9e is attached to the inner ring 9d of the thrust bearing 9a and / or the ball bearing 9b and / or the plain bearing 9c and / or the roller bearing by a compression fitting.

According to an inventive embodiment, the outer circumference of the bearing 9 has an outer and inner diameter outer sleeve 9f with a fastening part 9fb, which fastening part 9fb is a tubular projection at the intermediate tube end 9fc of the outer sleeve 9f.

"According to an inventive embodiment, the outer sleeve 9f is attached to the outer circumference 9g of the thrust bearing 9a N 25 and / or the ball bearing 9b and / or the plain bearing 9c and / or the roller bearing 4 with a compression fitting.

According to an inventive embodiment, a circular cylindrical fastening part 9fb, E having an inner diameter 9fd of the hole is such that the intermediate tube 3 fits inside the fastening part 9fb = 30 - gripping the inner surface of the fastening part 9fb from its outer surface.

S According to an inventive embodiment, a circular cylindrical fastening part 9fb having an internal thread on the inner diameter side 9fd of the hole, by means of which the outer sleeve 9f can be fastened to the end 3a of the intermediate tube 3 by means of the fastening part 9fb. The internal thread is sharp-edged, like the teeth of a reciprocating saw.

According to a structural solution, one or more non-rotating hubs 1 are around a flexible drive shaft 2, the drive shaft being centered inside the tube, the hub body 1a has a circular outer profile when viewed from the end and the center 1a in the longitudinal direction Lae in the central part or deviating from the longitudinal middle part 1ae lag 0 to 50 mm, whereby the drive shaft 2 can bend inside the body la, the diameter laf on both sides of the central part

- According to a construction solution, the outer circumference laa of the body 1a of the hub 1 is round when viewed from the front end and 1ac from the rear end, the diameter of the front end lab and the rear end Lac of the body 1a is smaller than the average diameter lad

- According to a structural solution, the body 1a of the hub 1 is bevelled from the front end 1ab and the rear end Lac, so that the fastener 1 can pass with the drive shaft 2 at the bends of the stands.

According to a solution of the structure, the body 1a of the hub 1 is rounded from the front end and rounded from the rear end Lac, whereby the fastener 1 can pass with the drive shaft 2 at the bends of the stands. According to a solution, the concentrator 1 has one or more bodies 1a, which can be placed on a flexible drive shaft 2, the drive shaft 2 N 25 - being centered inside the tube, the body 1a being substantially circular on the end. on its surface and in the middle of the body la there is a central hole laf for the drive shaft 2, the outer circumference o laa of the body 1a is round when viewed from the front lab and the rear end Lac, the diameter of the front end lab and ta- According to a structural solution, the body 1a of the hub 1 is bevelled from the outer surface at the front end and at the rear end Lac.

N According to a solution of the structure, the body 1a of the hub 1 is rounded from the front surface to the front end and rounded from the rear end Lac.

According to a solution of the structure, the body 1a of the hub 1 is spherical when viewed from the outside. According to a structural solution, the body 1a of the hub 1 is elliptical when viewed from the side. According to a structural solution, the outer circumference of the body 1a of the hub 1 is grooved in the longitudinal direction. According to a solution, the structure in the middle of the body 1a of the hub 1 is perpendicular - the side hole laf in the shape of an hourglass, viewed from the side of the body 1. According to a construction solution, at both ends of the body 1a of the hub 1 at the front lab and at the rear end Lac there is a conical recess with the narrow ends of the cones opposite to the center hole laf or the center hole laf the intermediate tubes 3 have hubs 1 which can be held in place in the longitudinal direction of the drive shaft 2. According to a solution, in the middle of the body 1a of the hub 1, viewed perpendicular to the side of the body 1, there is an hourglass-shaped central hole laf, in which the drive shaft 2 - can bend inside the body 1a. According to a solution, the longitudinal center line of the hub 1 has one or more central bearings 6 so that the drive shaft 2 does not rotate the body 1a of the hub 1. "According to an inventive embodiment, inside the central bearing 6, in its central hole, there is an N 25 sleeve 8 with a hole 8a for the drive shaft 2, the hole 8a having a larger diameter N than the outer diameter of the drive shaft 2, whereby the drive shaft 2 can also bend at the sleeve o 8.

I E According to a solution, the body 1a has a front end recess depth labb and ta- = 30 - the end recess depth lacb are most preferably of the same dimension, whereby the drive shaft 2 is bendable in the same way at the front end lab as at the rear end Lac.

N According to a structural solution, the dimension of the front access recess depth labb and the rear access recess depth lacb is most preferably 45 to 25 per cent of the total length Lae of the body la.

According to a structural solution, the central length 1lafd of the body 1a is 10 to 30 percent of the total length of the body 1a of the hub 1. 18. The outer diameter / outer circumference laa of the body 1a is 20-25% smaller than the inner diameter of the pipe (inside which work is performed).

USE OF THE INVENTION The hub is used like known comic wheel hubs. The centering device according to the invention can be produced by known methods from known materials - most preferably from plastic by molding or machining, e.g. turning. The invention is not limited to the alternatives presented above, but many modifications are possible within the scope of the inventive idea defined by the appended claims.

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Claims (15)

Claims: Centering method for centering tools inside tubes, characterized in that the centering method - comprises one or more non-rotating centerers (1) arranged around an elastic drive shaft (2), the drive shaft (2) being centered inside the tube, - the drive shaft (2) having a non-rotating shell and inside it a shaft of rotation rotating with a power transmission device, - one or more intermediate tubes (3) are arranged on the drive shaft (2) on one side or both sides of the center (1), with which intermediate tube the center (1) remains in the longitudinal direction of the drive shaft (2) even when the drive shaft (2) moves in the longitudinal direction of the tube, - one or more bearings (9) arranged at one end or at both ends of the intermediate tube / tubes (3) enable the centerer (1) not rotates inside the tube when the drive shaft (2) is moved in the longitudinal direction of the tube. Centering method according to claim 1, characterized in that the bearing (9) consists of one or more pressure bearings (9a) which are fixed on one or both ends (3a) of the intermediate tube (3) and the bearing is arranged around the drive shaft (2), the bearing (9) removes longitudinal friction of the end (3a) of the intermediate tube (3), which longitudinal friction is caused by a rotating working tool (4) counteracting the longitudinal movement of the tube of the drive shaft (2) and at the same time attempts to rotate the center (1) via the intermediate tube (3). Centering method according to claim 1, characterized in that the bearing (9) consists of one or more ball bearings (9b) or roller bearings which are fixed on one or both ends (3a) of the intermediate tube (3) and the bearing is arranged around the drive shaft (2) , the bearing (9) removes longitudinal friction of the end (3a) of the intermediate tube (3), which longitudinal friction is caused by a rotating working tool (4) counteracting the longitudinal movement of the tube of the drive shaft (2) and at the same time attempts to rotate the center (1) ) via the intermediate tube (3). Centering method according to claim 1, characterized in that the bearing (9) consists of one or more sliding bearings (9c) which are fixed to one or both ends (3a) on the intermediate tube (3) and the bearing has been arranged around the drive shaft (2), the bearing (9) removes friction in the longitudinal direction of the end (3a) of the intermediate tube (3), which friction in the longitudinal direction is caused by a rotating tool (4) counteracting the movement in the longitudinal direction of the tube of the drive shaft (2) and at the same time tries to rotate the center (1) via the intermediate tube (3). Centering device for centering tools inside tubes, characterized in that the device consists of - one or more non-rotating centerers (1) arranged around an elastic drive shaft (2), the drive shaft (2) being centered inside the tube, - the drive shaft (2) has a non-rotating shell and inside it a rotation shaft which is rotated with a power transmission device, - one or more intermediate tubes (3) are arranged on the drive shaft (2) on one side or both sides of the center (1), with which intermediate tube the center (1) ) remains in the longitudinal direction of the drive shaft (2) even when the drive shaft (2) moves in the longitudinal direction of the pipe, - one or more bearings (9) at one end or at both ends of the intermediate pipe / intermediate pipes (3). Centering device according to claim 5, characterized in that the bearing (9) consists of one or more pressure bearings (9a). Centering device according to Claim 5, characterized in that the bearing (9) consists of one or more ball bearings (9b) or roller bearings. Centering device according to Claim 5, characterized in that the bearing (9) consists of one or more sliding bearings (9c). Centering device according to claim 5, characterized in that an inner sleeve (9e) is arranged in an inner circuit (9d) in the bearing (9), which inner sleeve has an end surface (9ea). Centering device according to claim 9, characterized in that the inner sleeve (9e) is fixed in the pressure bearing (9a) and / or the ball bearing (9b) and / or the sliding bearing (9c) and / or the inner circuit (9d) of the roller bearing by means of a press fit . Centering device according to claim 5, characterized in that an outer sleeve (9f) is arranged in a circumference of the bearing (9) which has a fastening portion (9fb), which fastening portion (9fb) consists of a tubular projecting part at one end, that is, in an intermediate tube end (9fc), 1 outer sleeve (9f) against the intermediate tube (3). Centering device according to claim 11, characterized in that the outer sleeve (9) is fixed in the pressure bearing (9a) and / or the ball bearing (9b) and / or the circumference of the plain bearing (9c) and / or the roller bearing (9g) by means of a press fit . Centering device according to claim 11, characterized in that the round cylindrical fastening portion (9fb) has a heel with such an inner diameter (9fd) that the intermediate tube (3) fits into the fastening portion (9fb) and with its outer surface attaches to an inner surface on the mounting part (9fb) Centering device according to claim 11, characterized in that the round cylindrical fastening portion (9fb) has an inner thread of an inner diameter (9fd) in a heel, with which inner thread via the fastening portion (9fb) the outer sleeve (9fd) can be fastened to a end (3a) on the intermediate pipe (3) by screwing. Centering device according to claim 14, characterized in that the inner thread is sharp-edged.