Description

Background:

The invention relates to a joint for plastic pipes used to prevent liquid leakage and adding new branches in the fixed pvc plastic pipes.

This joint is composed of 3 rings (1 , 2, 3) (figure 3). The two smaller rings (1, 2) are the male rings, and the larger ring (3) is the female ring and its length equaling the total lengths of both smaller rings.

The mentioned joint is characterized with tightly engagement of the surfaces after gluing it, also it is characterized with the integrating of the smaller rings into the larger ring.

This joint may be used in the maintenance processes for the fixed pipes to prevent leakage or to add the branches without moving the pipe of its straightening axis, that is because moving the pipe of its straightening axis is required digging and cracking processes according to the nature of pipe place which may harm individuals and corporations by increasing the financial costs required for the maintenance processes in this field.

Moreover, the mentioned joint may be used in the drainage pipes by adding the American manhalls at any sight on the extension of the drainage pipe (figure 7) by make an adjustable joint composed of two ring joints (1 ,2) and two pieces from the same pipe (3,4) and a y shaped divider (5).

Also, this joint helps in shear processes for exploring the blocking of the drainage pipe, this is to ease return the pipe to its previous place by this joint. It is known that when using known joints for maintenance or adding the branches into the fixed pipes, the technicians facing many problems which makes the maintenance or adding the branches into the fixed pipes requires much costs and efforts since the installment of some known joints may require raising the pipe of its straightening axis which requires performing digging and cracking processes to finish the installation as shown in figure (10) and sometimes requires tensile process in two opposing directions which exposes the glue to duplicated tensile forces which leads to unglue or to reduce its shelf life which requires continuous maintenance process as shown in figure (8).

Accordingly, there is ideas to improve these described joints by performing a suitable modify on some accessories which leads to good results and after studding some accessories the reducer and the plug.

The reducer is defined as: one of the pipe accessories its use enables to change the stream of the liquids from one diameter to another by increasing or decreasing.

the plug is defined as: one of the pipe accessories fixed at the end of any branch to prevent water leakage.

The reducer is modified by shearing it Athwart into two cylinder rings (1,2) as in figure (1 ). And the plug was modified by opening its closed part with a diameter equals the targeted pipe diameter as in figure (2).

Accordingly, these two productions can be integrated after modifying (figures l and 2) to get a production can be entered in an adjustable joint used in the maintenance to prevent leakage or adding the branches into the fixed pipes without moving the pipe of its straightening axis as in figures (3) and (4).

Thus, it is possible to overcome the problems technicians facing when using similar joints as shown in figures (8), (9), and (10),

The defects of these similar joints are:

1 - The joint in figure (8):

Using this similar joint in maintenance processes for fixed pipes requires to enter this joint into an adjustable joint figure (8b), the connecting process needs tensile in two opposing directions which causes glue falling under duplicated tensile forces which may leads to unglue or to reduce the glue shelf life which requires to repeat maintenance process continuously.

2- The joint in figure (10):

Using this joint in maintenance processes for fixed pipes requires raising the pipe of its straightening axis which requires more digging and cracking processes and more harms to personal and public properties and more financial costs on individuals and corporations.

3- The joint in figure (9):

If this joint is cracked during using it in maintenance processes for fixed pipes, the length of this crack should not be longer than the length of this joint.

This invented ring joint is distinguished with the following comparing with other similar joints: 1- Doesn't require tensile processes during its installation, however, the glue is easily and simply used.

2- Its installation doesn't require raisin the targeted pipe or moving it of its straightening axis.

3- It can be used whatever the length of the crack since it can be entered into a multiple measurements adjustable joint as shown in figure (5),

General description of the invention:

To overcome different obstacles a ring joint was invented for the fixed pipes to prevent leakage or to add the branches, composed of three rings two smaller rings are the male rings, and the larger ring is the female ring entered into a multiple- gauge and measurements adjustable joint according to the diameter of the targeted pipe.

The subject of the invention joint is distinguished with many advantages like strength and stamina this is because of combing four surfaces by the glue (the pipe external surface (1) which is the male with the internal surface of the small ring (2) the female) and (the external surface of the small ring (3) which is the male with the internal surface of the larger ring (4)) as in figure (1 1) which gives the ring some stamina that is because the thickness in the joint place is in the range from 9 to 15 mm according to the diameter of the targeted pipe.

The adjustable joint, which comprising the invention as one of its constitutions, varies according to the variance in the matter of maintenance as follow:

In the leakage condition:

The adjustable joint is formed from two ring joints (1 , 2) and alternative piece (3) of the same targeted pipe as shown in fig. (4), part (4a) in case of adding branches: The adjustable joint is formed from two ring joints (9' 10) and two pieces of the same targeted pipe (4, 4) and divider (5) which the branch (6) is derived thereof as shown in fig. (6), part (6a).

In case of adding American manholes for drainage pipes :

The adjustable joint is formed from two ring joints (I , 2) and two pieces of the same targeted pipe (3, 4) and Y shaped divider (5) and a piece of the same pipe (6) and hemi-angle inclined elbow pipe (7) as shown in fig. (7).

Description of the rings of the invention;

In the end of the small ring which is fixed in the main pipe (1) as shown in the fig. (1) there is octahedral protrusion which assists in the retraction process and sealing with the gluing, as it represent a part of the female side.

The small ring which is fixed in the alternative piece end (2) as shown in the Fig, (1) has an equal length, thickness, and diameter as the one fixed in the main pipe end, except in the octahedral protrusion, as it represent the other part of the female side.

The large ring as shown in the Fig. (2) has length which equals the total lengths of the two smaller rings, and it has on its front end protrusion which assists in the retraction process and sealing with the gluing, as it has in its rear end a slope assists in sealing with the gluing and giving the invention good details.

Brief description of the drawings:

Figure (1): represents the smaller rings of the invention.

Figure (2): represents the larger ring of the invention. Figure (3): represents the invention.

Figure (4): represents steps of installing the adjustable joint for preventing leakage.

Figure (5): represents multiplicity of measures.

Figure (6): represents steps of installing the adjustable joint for adding the branches.

Figure (7): represents usage of the adjustable joint in drainage pipes.

Figure (8): represents disadvantages of a known joint using tensile process affecting the gluing in two opposing directions.

Figure (9): represents disadvantages of a known joint used in cracks with specified measures. Figure (10): represents disadvantages of a known joint which its installation requires lifting the pipe off the straightening axis thereof.

Figure (11): represents longitudinal and cross section of the adjustable joint showing the engagement of the surfaces with gluing.

Detailed description:

Figure (1) represents the two smaller rings (1 , 2) of the invention wherein one of the rings has octahedral protrusion (3) and is fixed in the main pipe end for assisting in sealingly gluing and giving the invention a good detail, and Figure (2) represents the larger ring (3) of the invention which has protrusion (1) on its front end assisting in sealingly gluing and slope (2) in its rear end for sealingly gluing from the back and giving the invention a good detail, Figure (3) represents the invention before the engagement with the two rings (1 , 2) and the large ring (3), Figure (4) shows steps of installing the adjustable joint when used for preventing leakage in the fixed pipes, (4a) represents the adjustable joint which prevent the leakage of liquids before engagement and is formed from two ring joints (8, 9) and alternative piece (10) and two ends of the fixed main pipe (4, 5).

In Figure (4b) the adjustable joint is adapted for its final position before moving the large rings towards the small rings such that the rings (1 , 1) are fixed in both ends of the main pipe (4, 5) and rings (2, 2) in the both ends of the alternative piece (6-7) and the large rings (3, 3) is located in the middle of the alternative piece in two opposing directions, as the fig, (4c) represents the adjustable joint in its final position and the entire closure of the pipe, thus the two small rings are located entirely within the large ring and is glued on points (1 1 , 12, 13, 14). Figure (5) represents one advantage of using the ring joint as it can be used in adjustable joint with multiple measures and points (1 , 2) representing the ring joints and point (3) represents alternative pieces with multiple measures. Figure (6) represents a usage of the multiple usages of the invention which is adding branches for the fixed pipe and shows the adjustable joint stages and is formed from small rings (1, 1) (2, 2) and large rings (3, 3) and two alternative pieces of the same pipe (4, 4) and divider for drawing the branch (5), the branch (6) and both ends of the fixed pipe (7, 8). Figure (6a) shows the projection stage of the adjustable joint and (6b) shows the preparation of the final closure and (6c) shows the final closure for drawing the branch. Figure (7): represents two types of usage for the invention in drainage pipe as (7a) represents adding of branch for the drainage pipe wherein the points (1, 2) represent the ring joints and the points (3, 4) represent pieces of the same pipe and point (5) refer to Y shaped divider for adding a new branch for the main drainage pipe and points (6, 7) refer to both ends of the main pipe and point (8) refers to the branch which was added and (7b) represents adding of American manhole to the drainage pipes as the points (1 , 2) refer to the ring joints and the points (3, 4) represent pieces of the same pipe and point (5) refer to Y shaped divider and points (6, 7) refer to both ends of the main pipe and point (8) refers to piece of the same pipe which is a neck of the manhole which is connected with the head of the manhole or what is called hemi-angle elbow pipe (9), Figure (8a) represents disadvantages of a known joint consists of three rings: ring (1) which is threaded outwardly ring which is fixed in the main pipe end, ring (2) unthreaded ring which is fixed in the alternative piece end, ring (3) which is threaded inwardly ring, Figure (8b) represents the adjustable joint which is adapted for the insertion of this known joint inside it and it is noted that the opposing tensile processes that may occur in such adjustable joint can lead to ungluing or lowering its durability which thereby requiring frequently maintenance processes. Figure (9)_shows connection disadvantages of a known joint when the crack is larger than the joint length as fig, (9a) represents pipe having a crack 1 which has a length larger than the known joint length which thereby make this joint useless in fixing this crack, (9b) a known joint which is formed from two parts (2, 3) which are fixed with each other on the crack using tensile force on pins on the ends of the both parts of the known joint as the crack length being smaller than the known joint length. Figure (10) shows connection disadvantages of a known joint when it is used in connecting the fixed pipes and it is used in connecting the pipes for preventing leakage but its connection requires lifting of both pipe ends (2, 3) which leads to increasing digging and cracking processes. Figure (11) represents longitudinal and cross section of the adjustable joint wherein the points (1, 2) represent the smaller rings which are the male part of the large ring (3) and are the female part of the main pipe and the alternative piece which is referred to with the points (4, 5) as for the points (6, 7) then it refer to the engagement of the surfaces with gluing.

The present invention may be designed as follows:

The present invention relates to a joint for plastic pipes specified for fixed pvc pipes to prevent leakage or add branches, it comprises two small cylindrical rings and a larger cylindrical ring such that the length of the larger cylindrical ring equals the total lengths of both smaller rings, the external surface of the small two rings is the male element and the larger ring is the female this is from one side, from the other side the internal surface of the small ring is the female part while the external surface of the targeted pipe is the male part as in figure (1 1 ).

The thickness, the length, and the diameter of the three rings differ according to the diameter of the targeted pipe.

The thickness of the rings ranges between 3 to 5 cm, and its length between 3 to 10 cm, and its diameter ranges between 2 to 25 cm according to the targeted pipe.

When performing sealing processes or adding branches we need to insert the ring joint for the pipes in the adjustable joint.

The adjustable joint definition: in case of preventing leakage: it is formed of two ring joints (8, 9) and piece of alternative pipe (10) as shown in fig. (4) part (4a).

The alternative piece: it is a piece of the same pipe that is arranged instead of the cracked piece which is the leakage region and it equals its length. The adjustable joint definition: in case of drawing the branches: it is formed of two ring joints

(9 ' 10) and two pieces of the same pipe (4, 4) and divider for drawing the branches (5) as shown in fig. (6) part (6b).

Two small rings are fixed with glue in both ends of the targeted main pipe then the adjustable joint is projected in its place and moving the large rings towards the small rings to achieve integration of the small rings within the large rings as shown in fig. (6) part (6c) in case of adding the branches or fig. (4) part (4c) in case of maintenance of the fixed pipes for prevention of leakage.