WO2004018921A1

WO2004018921A1 - Elbow for hot water and cold water piping

Info

Publication number: WO2004018921A1
Application number: PCT/KR2003/001005
Authority: WO
Inventors: Choon-Sik Kim
Original assignee: Etube Co., Ltd.
Priority date: 2002-08-22
Filing date: 2003-05-22
Publication date: 2004-03-04
Also published as: AU2003232644A1

Abstract

The present invention relates to an elbow for piping which is used during a water supply piping work for every walls of a toilet, kitchen or the like that require water supply piping upon a building construction. The elbow for hot water and cold water piping comprises a valve connecting portion formed on an inner circumferential face of the front surface of a main body, a thickness regulating rod with a plurality of kerfs on the rear side, a fixed bar interfix mounted on one side face and a connecting portion formed on a lower side for connecting a water supply pipe, wherein a disc type flange portion is formed on an outer circumferential face of the front surface; a plurality of nail connecting holes are formed on the cylindrical surface of the flange portion; a fixed ring with a plurality of protuberances formed on an inner circumferential face, a washer, a rubber packing and a ring are sequentially inserted into the water supply pipe connecting portion on the lower side; and a water supply pipe joint with a screw portion is mounted on an outer circumferential face for coupling an engaging portion. Therefore, the elbow can be fixed to a wall more firmly and the connection between the elbow and the water supply pipe can be carried out more conveniently and more firmly, thereby improving a working efficiency, reducing the labor and cost required for the work and preventing the damage of the elbow due to a hydraulic pressure.

Description

ELBOW FOR HOT WATER AND COLD WATER PIPING

TECHNICAL FIELD

The present invention relates to an elbow for a pipe which is used for every wall bodies, such as of a washroom or kitchen, requiring a water supply pipe in a water piping work when constructing a new building. More particularly, the present invention relates to an elbow for a cold and hot water pipe which allows a piping work without damaging a wall body, makes the connection of a water supply pipe to the elbow more firmly and more convenient performed, allows the elbow to be fixed to the wall body more firmly and more conveniently and prevent damage ceased by a high water pressure by mounting a water supply pipe to reinforcement bars arranged to a wall body before placing concrete into the wall body without hollowing out a hole or groove on the wall body for mounting the water supply pipe upon the work and then carrying out a form work and a concrete placement work.

BACKGROUND ART

In conventional water works, after the completion of a building, a water supply pipe is laid by forcedly hollowing out grooves on a wall body using a chisel, hammer, hammer drill, etc. and cutting out reinforcement bars, the building wall body get damaged much. This becomes an obstacle to a perfect waterproofing work and incurs an enormous loss on materials and manpower.

Besides, there is a problem that noises generated during the works cause those people around the work site.

Accordingly, to overcome the above problems, the present inventor developed an elbow as in Korean Utility Model Registration No. 280022 (registered on 17 June, 2002) wherein a water supply pipe is laid in advance on reinforcement bars using a fixed elbow before placing concrete on a building wall body and after arranging the reinforcement bars on the wall body, a fixed rod is fitted into a fixed rod insertion formed on a left fixed elbow and a right fixed elbow by a framework of the fixed elbow corresponding to a base main body to adjust the width, front fixed ridges each formed on the upper, lower, left and right sides of a front plumbing bob are tightly contacted to an inside form constituting the building wall body, and an outside form is tightly contacted to the end surface of a wall thickness control rod with a cut groove formed on the rear surface of the fixed elbow. In this fixed elbow for a cold and hot water pipe, when concrete is placed between the inside form and the outside form and cured and then the forms are removed, only water cranes are exposed to the building walls. By coupling a valve or the like to the water cranes, a water supply piping work can be carried out without damaging the wall body and making noises.

However, the elbow for a hot and cold water pipe is problematic in that a connection work is very troublesome since a water supply pipe has to be inserted and connected to a lower coupling hole of the elbow, and besides there is a possibility of leakage due to the generation of a clearance between connecting portions. Additionally, upon fixing the elbow on the wall body by placing concrete, the elbow is fixed only by fixing ridges formed on the four sides of the outer peripheral face, thus the elbow cannot be firmly fixed to the wall body.

Further, in the conventional elbow for a hot and cold water pipe, a valve is slowly opened or shut in case of using a conventional rotary type valve, thus water is slowly introduced through the elbow. Consequently, although a relatively stable water pressure is maintained, there is also a possibility that the elbow may be broken by an instant high pressure of water in case a valve opened and shut instantly is used.

Moreover, the control rod of the elbow is properly cut for use according to the width of the concrete wall body to be constructed. If the control rod is cut more than necessary in a cutting procedure or a fine clearance generates, a new elbow has to be cut for use. This causes a waste of resources unnecessarily, reduces workability and makes it difficult to form a uniform outer wall.

DISCLOSURE OF INVENTION The present invention has been developed for the purpose of solving the foregoing problems and thus it is an object of the present invention to provide an elbow for a cold and hot water pipe, which can fix an elbow more firmly fixed to a wall body, achieve the connection between the elbow and the water supply pipe more conveniently and more firmly, improve working efficiency, reduce man power and costs required for the work and prevent the damage caused by a water pressure by having a flange portion with a nail coupling hole formed on the front surface of the elbow exposed to the wall body, a screw type water supply pipe connector mounted to the water supply pipe connecting portion, an air chamber formed of a sealed space portion formed on the upper part of the main body of the elbow, and a spring member and a fixed plate mounted on the thickness control rod.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of preferred embodiments of the present invention will be more fully described in the following detailed description, taken accompanying drawings. In the drawings: Fig. 1 is a perspective view illustrating a separated state of an elbow according to the present invention;

Fig. 2 is a perspective view illustrating a combined state of the elbow according to the present invention; Fig. 3 is a cross sectional view of the elbow according to the present invention;

Fig. 4 is a perspective view illustrating a using state of the elbow being mounted and fixed to reinforcement bars according to the present invention;

Fig. 5 -is a perspective view illustrating a separated state of the elbow being mounted and fixed to reinforcement bars according to the present invention;

Fig. 6 is a perspective view illustrating a separated state of an embodiment in which an air chamber is formed on the elbow of the present invention;

Fig. 7 is a perspective view illustrating a combined state of the embodiment in which the air chamber is formed on the elbow of the present invention;

Fig. 8 is a cross sectional view illustrating the embodiment in which the air chamber is formed on the elbow of the present invention; Fig. 9 is a partially cutaway perspective view illustrating another embodiment in which an air chamber and a spring are mounted on the elbow of the present invention;

Fig. 10 is a cross sectional view illustrating the embodiment in which the air chamber and the spring are mounted on the elbow of the present invention; Fig. 11 is a cross sectional view illustrating a using state according to the embodiment in which the air chamber and the spring are mounted on the elbow of the present invention;

Fig. 12 is a partially cutaway perspective view illustrating an embodiment in which a fixed plate is mounted on the elbow of the present invention;

Fig. 13 is a cross sectional view illustrating the embodiment in which the fixed plate is mounted on the elbow of the present invention; Fig. 14 is a cross section explanatory view illustrating an operating state of the embodiment in which the fixed plate is mounted on the elbow of the present invention; and

Fig. 15 is a cross section explanatory view illustrating an using state of the embodiment in which the fixed plate is mounted on the elbow of the present invention. < Explanation of Reference Numerals for Main Parts of Drawings> 1 : main body 2: flange portion

3: thickness control rod 4: notch

5: fixed bar insertion 6: water supply pipe connector 7: screw portion 8: fixed ring 9: washer 10: rubber packing 11 : ring 12: engaging cap

13: nail coupling hole 14: valve connecting portion 15: water supply pipe 16: reinforcement bar 17: wire 18: valve

19: concrete wall body 20: form

21 : fixed bar 22: air chamber

23: space portion 24: sealing cap

25: spring 27: fixed plate

28: coupler 29: insertion hole

30,30': ridge

BEST MODES FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view illustrating a separated state of an elbow according to the present invention, Fig. 2 is a perspective view illustrating a combined state of the elbow according to the present invention, and Fig. 3 is a cross sectional view of the elbow according to the present invention.

The elbow for a hot and cold water pipe of this invention has a valve connecting portion 14 formed on the inner peripheral surface of one end of an elbow main body 1, a thickness control rod 3 formed on the other end of the elbow main body and having a plurality of notches, and a water supply pipe connecting portion extending downward from between the valve connecting portion and the thickness control rod, having a fixed bar insertion 5 mounted on one side and having a water supply pipe 15 connected to the lower end. In addition, the elbow for the hot and cold water pipe of this invention includes a flange portion 2 which is formed on the outer peripheral surface of one end of the main body in a disc shape and is provided with a plurality of nail coupling holes 13 on the circumference. The water supply connecting portion has a fixed ring 8 with a plurality of protuberances, a washer 9, a rubber packing 10 and a ring 11 all formed on the inner peripheral surface and sequentially inserted thereto and a screw portion 7 formed on the outer peripheral surface and a water supply pipe connector 6 formed on the screw portion 7 and coupled with an engaging cap 12.

Hereinafter, the operation of this invention will be explained with reference to the accompanying drawings.

Upon piping using the elbow of this invention, as shown in Fig. 4, a fixed bar 21 is inserted into a fixed bar insertion 5 formed on the main body 1 to connect two elbows each other, and a wall thickness control bar 3 formed on the rear of the elbow main body 1 is leveled with the thickness of a building wall body to cut notches 4.

A water supply pipe 15 is coupled to a water supply connector 6, then a form 20 is located between the end of the flange portion 2 and the end of the wall thickness control rod 3, and then the form is tightly adhered to both opposite sides, thereby allowing the elbow to be kept horizontal and vertical precisely by the flange portion 2 of a disc type formed on the front surface of the elbow main body 1.

Upon connecting the water supply pipe 15 to the water supply pipe connector 6, the engaging cap 12 coupled to the screw portion 7 is loosened, the water supply pipe 15 is inserted as far as a fixed ring 8, and then the engaging cap 12 is clamped. Then, by this engaging force, the ring 11 gives a pressure to a rubber packing 10 and the fixed ring 8, thereby to firmly fix the water supply pipe 15 and keep water tightness.

As seen from above, when the both side elbows are precisely located, the water supply pipe is fixed to a reinforcement bar 16, concrete is placed into the form 20 to be cured and then the form 20 is removed, thereby to complete a concrete wall body 19 with the flange portion 2 of the elbow being exposed to the outside as shown in Fig. 5. Once the concrete wall body 19 is completed, a nail is driven into a nail coupling hole 13 formed on the flange portion 2 to firmly fix the elbow to the wall body, and then a valve 18 is connected to the valve connecting portion 14.

Fig. 6 is a separated perspective view illustrating an embodiment in which an air chamber is formed on the elbow of the present invention, Fig. 7 is a perspective view illustrating a combined state of the embodiment in which the air chamber is formed on the elbow of the present invention, and Fig. 8 is a cross sectional view illustrating the embodiment in which the air chamber is formed on the elbow of the present invention. On an upper part of the elbow main body 1 , an air chamber 22 provided with a space portion 23 connected to a flow channel in the main body 1 is mounted.

In a case that a valve is mounted to the thusly constructed elbow for use, if the valve is opened and shut instantly, water in the main body 1 is introduced into the space portion 23 of the air chamber 22 penetrating the main body 1. By this, a shock caused by a water pressure is alleviated, thereby to prevent the elbow from being damaged by the water pressure. Fig. 9 is a partially cutaway perspective view illustrating another embodiment in which an air chamber and a spring are mounted on the elbow of the present invention, and Fig. 10 is a cross sectional view illustrating the embodiment in which the air chamber and the spring are mounted on the elbow of the present invention. As shown therein, the elbow is constructed in such a manner that a sealing cap 24 made of metal is inserted into the air chamber 22, with the upper end sealed and the lower end opened, and a space control spring 25 is inserted into the thickness control rod 3.

As shown in Fig. 11 , the thusly constructed elbow achieves a more precise space control by the expansion and relaxation of the space control spring 25, the space control spring 25 being inserted into the thickness control rod 3. If the thickness control rod 3 is cut slightly more than a set value and the spring 25 is inserted thereinto, the spring 25 occupies the space generated between the form and the thickness control rod 3. By this, even if a precise cutting is not attained, the insertion into the form can be made at a uniform width.

Therefore, the valve connecting portion 14 exposed to an outer wall of the concrete wall body 19 of a cured state is always constructed according to a fixed standard, so there is no constructional defect and no repair is needed at all.

Additionally, the air chamber 22 formed on the upper end of the main body 1 has inside the sealing by the sealing cap 24 made of metal for preventing air leakage, thus air preservabililty is sharply improved and the function of the air chamber 22 is maintained for a long time.

Fig. 12 is a partially cutaway perspective view illustrating an embodiment in which a fixed plate is mounted on the elbow of the present invention, Fig. 13 is a cross sectional view illustrating the embodiment in which the fixed plate is mounted on the elbow of the present invention, Fig. 14 is a cross section explanatory view illustrating an operating state of the embodiment in which the fixed plate is mounted on the elbow of the present invention, and Fig. 15 is a cross section explanatory view illustrating an using state of the embodiment in which the fixed plate is mounted on the elbow of the present invention.

As shown therein, ridges 30 are formed on the outer peripheral surface of the end of the thickness control rod 3 in the shape of a protuberance, a fixed plate 27 of a disc type is integrally formed with a coupler 28 having an insertion hole 29 which the thickness wall control rod 3 is inserted into and removed from. A plurality of ridges 30' are formed on the inner peripheral surface of the insertion hole 29 of the coupler 28, for stopping the ridges 30 of the thickness control rod 3, and the spring 25 is disposed between the ridge 30' and the inner sidewall of the coupler 28.

In the thusly constructed elbow, as the thickness control rod 3 is coupled to the fixed plate 27, the main body of the elbow is kept precisely horizontal by the fixed plate 27, thus the main body can be firmly fixed to the form without moving upon placing concrete.

Furthermore, the elbow prevents the thickness control rod 3 from being easily separated by an elastic force of the spring 25 or an external force in a state that the thickness control rod 3 is inserted into the coupler 28 by the plurality of ridges 30 and 30' formed on the outer peripheral surface of the thickness control bard 3 and on the inner peripheral surface of the coupler 28, thereby improving workability.

INDUSTRIAL APPLICABILITY As described above, the present invention is constructed in a manner that a flange portion with a nail coupling hole is formed on the front surface of the elbow exposed to the wall body, a screw type water supply pipe connector is mounted to the water supply pipe connecting portion, an air chamber formed of a sealed space portion is formed on the upper part of the main body of the elbow, and a spring member and a fixed plate are mounted on the thickness control rod.

By this, the elbow can be more firmly fixed to the wall body, the connection between the elbow and the water supply pipe can be achieved more conveniently and more firmly, working efficiency can be improved, man power and costs required for the work can be reduced and the damage caused by a water pressure can be prevented.

Claims

1. An elbow for a hot and cold water pipe which has a valve connecting portion (14) formed on the inner peripheral surface of one end of an elbow main body (1), a thickness control rod (3) formed on the other end of the elbow main body and having a plurality of notches, and a water supply pipe connecting portion extending downward from between the valve connecting portion and the thickness control rod, having a fixed bar insertion (5) mounted on one side and having a water supply pipe connected to the lower end, wherein the elbow includes a flange portion (2) which is formed on the outer peripheral surface of one end of the main body in a disc shape and is provided with a plurality of nail coupling holes (13) on the circumference, and the water supply connecting portion having a fixed ring (8) with a plurality of protuberances, a washer (9), a rubber packing (10) and a ring (11) formed on the inner peripheral surface and sequentially inserted thereto and a screw portion (7) formed on the outer peripheral surface and a water supply pipe connector (6) formed on the screw portion (7) and coupled with an engaging cap (12).

2. The elbow of claim 1, wherein an air chamber (22) with a space portion (23) connected to a flow channel in the main body (1) is formed on an upper part of the water supply pipe connecting portion of the elbow main body (1).

3. The elbow of claim 1, wherein a sealing cap 24 made of metal is inserted into the air chamber (22), with the upper end sealed and the lower end opened, and a space control spring (25) is inserted into the thickness control rod (3).

4. The elbow of claim 1, wherein ridges (30) are formed on the outer peripheral surface of the thickness control rod (3) in the shape of a protuberance, a fixed plate (27) of a disc type is integrally formed with a coupler (28) having an insertion hole (29) which the thickness wall control rod (3) is inserted into and removed from, and a plurality of ridges (30') are formed on the inner peripheral surface of the insertion hole (29) of the coupler (28) for stopping the ridges (30) of the thickness control rod (3), and the spring (25) is disposed between the ridge (30' ) and the inner sidewall of the coupler.