RU2786868C1 - Polypropylene rotary-axial coupling - Google Patents

Abstract

FIELD: pipe fitting devices.

SUBSTANCE: he invention relates to the field of pipe fitting devices that have the ability to rotate when they are oriented without loss of tightness, and can be used to connect several pipes to a supply hose in which water flows under pressure. Polypropylene rotary-axial coupling consists of a first and second elbow with the possibility of rotating one end of the coupling relative to the other and an external thread that is connected to the pipeline pipe. On the first elbow, in the form of a straight polypropylene pipe at one end, connected by soldering with a polypropylene fitting, a stainless steel spring with a diameter equal to the outer diameter of the polypropylene pipe is put on. The spring is necessary to create an elastic pressure on the second elbow in the form of a fitting with an external thread, the thread diameter of which is larger than the diameter of the polypropylene pipe, so that the first elbow in the form of a straight polypropylene pipe with a fitting passes into the upper fitting with an external thread, on one side of which, close to the spring, there is a lower cavity into which several sealing rings are placed, the inner diameter of which is equal to the outer diameter of the polypropylene pipe. A low-pressure polypropylene washer is installed in the lower cavity, the height of which occupies the remaining depth of the lower cavity, but the width of one coil of the spring is less, the inner diameter of the low-pressure polypropylene washer is equal to the diameter of the polypropylene pipe used to press the sealing rings and the low-pressure polypropylene washer, and a low-pressure polypropylene washer is also installed in the upper cavity. pressure, the height of which is equal to the height of the thread on the upper coupling. A fixing element applied along the entire circumference by soldering is installed on the upper end of the polypropylene pipe, which prevents the spring from decompressing and is equal to the outer diameter of the thread of the upper coupling, a rubber O-ring is installed between the upper coupling and the fixing element.

EFFECT: invention enables to create a strong and tight connection of pipe connections with each other using a polypropylene rotary-axial coupling without using an internal threaded connection, which contributes to the simplification of the design due to a simpler mechanism for creating tightness.

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Description

The invention relates to the field of pipe connection devices that can be rotated during their orientation, without loss of tightness and can be used to connect several pipes to a supply hose in which water flows under pressure, for example, in manual hydraulic drilling of a well, as well as for supplying water under pressure with further irrigation by a drum-type sprinkling machine and various irrigation systems.

A pipe swivel coupling is known mainly for connecting misaligned pipes of a pipeline for transporting liquid or gas, containing the first elbow in the form of a bent pipe with an internal thread at one end for a threaded connection with one of the pipeline pipes to be connected, the second elbow in the form of a bent pipe with an internal thread on one end for a threaded connection with the other of the pipeline pipes to be connected, while at the other ends both elbows are threaded (RU 2056573, IPC F16L 15/00, publ. 20.03.96).

The disadvantage of the known coupling is that it is a rigid coupling, although it allows for spatial adjustment of the position of misaligned pipes, but is adapted to connect only pipes of such a pipeline, which is not affected by external loads, as a result of which it is possible to change the position of the pipes relative to each other

The disadvantage is that these devices or couplings cannot be used to connect the ends of two pipes, since they do not provide a longitudinal transverse connection and do not provide a tight connection between the internal cavities.

A well-known pipe connection unit contains a fitting, in the middle part of which a multifaceted turnkey head is made, and on the outer surfaces of the ends of the fitting there are cylindrical threaded surfaces designed to interact with the corresponding cylindrical threaded surfaces made on the inner surfaces of the ends of the connected pipes, and sealing cuffs, placed between the ends of the pipes (US 3441292, IPC F16L 15/00, publ. 04/29/1969).

The disadvantage of this device is, firstly, it is not possible to rotate the connected pipes around their axes when they are oriented without losing the tightness of the connection. Secondly, it is impossible to achieve the tightness of this assembly without the use of sealing cuffs. In addition, it is of limited use, since it only connects special pipes, the end surfaces of which have a certain profile.

Known pipe connection unit containing a fitting, in the middle part of which a multifaceted turnkey head is made, while on the outer surface of one end of the fitting a conical thread is made, and the other end of the fitting is designed for connection with a pipe, an L-shaped coupling, on the inner surface of one end which has a conical thread designed to interact with the conical thread of one end of the fitting, and on the inner surface of the other end of the coupling there is a cylindrical thread intended for connection with the second pipe, and a sealing cuff located between the end face of the coupling and the fitting wrench head (FR 2252527 IPC F16L 15/00, published 02/27/1999).

The disadvantage of this device is that it does not provide the possibility of rotation of the connected pipes around the axis of the fitting when they are oriented without losing the tightness of the connection.

Closest to the claimed invention is a coupling for power contact and functional connection of two cylindrical tubular bodies, containing parts in the form of knees, one of which serves as a holder for the other. The connection of the elbows to each other due to the thread allows the pipes attached to the elbows to mutually rotate in the longitudinal plane around their axis of symmetry for the tightness of the pipe connection, clamping bushings with elastic gaskets pressed to the ends of the coupling and to the end slot of the threaded connection (RU 2135877 IPC F16L 15/00, published 27.08.1999).

The disadvantage of the known coupling is that it is not possible without the use of an internal threaded connection to provide connection between the knees.

The technical result of the claimed invention consists in simplifying the design, as well as in a simple and strong hermetic connection between the individual parts of the polypropylene rotary axial coupling.

The essence of the invention lies in the fact that the polypropylene rotary-axial coupling consists of the first and second elbows with the possibility of turning one end of the coupling relative to the other and an external thread, which is connected to the pipeline pipe. On the first knee, in the form of a straight polypropylene pipe at one end, connected by soldering to a polypropylene fitting, a stainless steel spring is put on, with a diameter equal to the outer diameter of the polypropylene pipe. The spring is necessary to create an elastic pressure on the second elbow in the form of a fitting with an external thread, the thread diameter of which is greater than the diameter of the polypropylene pipe, so that the first elbow in the form of a straight polypropylene pipe with a fitting passes into the upper fitting with an external thread, on one side of which there is a close there is a lower cavity to the spring, in which several sealing rings are placed, the inner diameter of which is equal to the outer diameter of the polypropylene pipe. A washer made of low pressure polypropylene is installed in the lower cavity, the height of which occupies the remaining depth of the lower cavity, but the width of one turn of the spring is less, the inner diameter of the washer made of low pressure polypropylene is equal to the diameter of the polypropylene pipe used to press the sealing rings and the washer made of low pressure polypropylene, and a washer made of low-pressure polypropylene is also installed in the upper cavity, the height of which is equal to the height of the thread on the upper sleeve. A fixing element is installed on the upper end of the polypropylene pipe, applied over the entire circumference by soldering, which prevents the spring from expanding and is equal to the outer diameter of the thread of the upper coupling, a rubber sealing ring is installed between the upper coupling and the fixing element.

The drawing shows a polypropylene rotary axial coupling.

The polypropylene rotary-axial coupling consists of the first elbow in the form of a straight polypropylene pipe 1, at one end connected by soldering 2 with a polypropylene fitting 3, suitable for the diameter of the polypropylene pipe and having a transition to an external thread, which is connected to one of the pipes of the pipeline, on polypropylene pipe 1 connected by soldering 2 to a polypropylene fitting 3, a stainless steel spring 4 is put on, with a diameter equal to the outer diameter of the polypropylene pipe 1, which is necessary to create an elastic pressure on the second elbow in the form of a fitting with an external thread 3, the thread diameter of which is larger than the diameter polypropylene pipe 1, so that 1 elbow in the form of a straight polypropylene pipe 1 with a fitting 3 passes into the upper fitting with an external thread 5, on one side of which (close to the spring) it has a lower cavity into which several sealing rings 6 are placed, the inner diameter which is equal to the diameter of the polypropylene pipe 1, and in the rest In the lower cavity, a washer made of low-pressure polypropylene 7 is installed, the height of which occupies the remaining depth of the lower cavity, but the width of one coil of the spring is less. The inner diameter of the washer made of low pressure polypropylene 7 is equal to the diameter of the polypropylene pipe 1, which is used to press the sealing rings 6, after installing the fitting 5 with an external thread, a washer made of polypropylene 7 is installed in the cavity between the polypropylene pipe 1, the inner diameter of which is equal to the outer diameter of the polypropylene pipe 1, and the height of the washer is equal to the height of the thread on the coupling 5. After all the necessary components are installed, the coupling 5 is pressed to give elasticity to the spring and create a pressing force in the connection to fix the elements 6 and 7 in a constant position, then the fixing element 10 is soldered 9 along the entire circumference, which prevents the spring from expanding and is equal to the outer diameter of the thread of the coupling 5, a rubber sealing ring 11 is installed between the coupling 5 and the fixing element 9.

The assembly of a polypropylene rotary axial coupling is carried out as follows. A polypropylene fitting 3 is soldered to a straight section of a polypropylene pipe 1 by soldering 2 (using a pipe soldering machine), suitable for the diameter of the polypropylene pipe and having a transition to an external thread, which is connected to one of the water pipes, to a polypropylene pipe 1 connected by soldering 2 with a polypropylene fitting 3, a stainless steel spring 4 is put on, with a diameter equal to the outer diameter of the polypropylene pipe 1, which is necessary to create an elastic pressure on the second elbow in the form of a fitting with an external thread 3, the thread diameter of which is larger than the diameter of the polypropylene pipe 1, in order to so that 1 elbow in the form of a straight polypropylene pipe 1 with a fitting 3 passes into the upper fitting with an external thread 5, on one side of which (close to the spring) it has a lower cavity, into which several sealing rings 6 are placed, the inner diameter of which is equal to the diameter of the polypropylene pipe 1 , and washers are installed in the remaining lower cavity and from low-pressure polypropylene 7, the height of which occupies the remaining depth of the lower cavity, but the width of one turn of the spring is less, the inner diameter of which is equal to the diameter of the polypropylene pipe 1, which serves to press the sealing rings 6. After installing the fitting 5 with an external thread into the cavity between the polypropylene pipe 1 installs a washer made of polypropylene 7, the inner diameter of which is equal to the outer diameter of polypropylene pipe 1, and the height of the washer is equal to the height of the thread on the coupling 5, after all the necessary components are installed, the coupling 5 is pressed to give the spring elasticity and create a pressing force in the connection to fix elements 6 and 7 in a constant position, then soldering 10 of the fixing element 9 around the entire circumference, which prevents the spring from expanding and is equal to the outer diameter of the thread of the coupling 5, a rubber sealing ring 11 is installed between the coupling 5 and the fixing element 9.

The present invention allows the use of a polypropylene rotary-axial coupling for vertical or horizontal connection of pipes used in manual hydraulic drilling of a well (vertical connection), as well as for supplying water under pressure with further irrigation by a drum-type sprinkling machine (horizontal connection).

Compared with the known solution, the proposed solution allows you to create a strong and tight connection between pipe joints using a polypropylene rotary-axial coupling without using an internal threaded connection, which helps to simplify the design due to a simpler mechanism for creating tightness.

Claims (1)

Polypropylene rotary-axial coupling, consisting of the first and second elbows with the possibility of turning one end of the coupling relative to the other, and an external thread, which is connected to the pipeline pipe, characterized in that it is on the first elbow, in the form of a straight polypropylene pipe at one end, connected to using soldering with a polypropylene fitting, a stainless steel spring with a diameter equal to the outer diameter of the polypropylene pipe is put on, which is necessary to create an elastic pressure on the second elbow in the form of a fitting with an external thread, the thread diameter of which is greater than the diameter of the polypropylene pipe, so that the first elbow in in the form of a straight polypropylene pipe with a fitting passed into the upper fitting with an external thread, on one side of which, close to the spring, it has a lower cavity into which several sealing rings are placed, the inner diameter of which is equal to the outer diameter of the polypropylene pipe, a polypropylene washer is installed in the lower cavity low pressure, the height of which occupies the remaining depth of the lower cavity, but the width of one turn of the spring is less, the inner diameter of the low-pressure polypropylene washer is equal to the diameter of the polypropylene pipe used to press the sealing rings and the low-pressure polypropylene washer, and a washer made of low pressure polypropylene is also installed in the upper cavity. low-pressure polypropylene, the height of which is equal to the height of the thread on the upper sleeve, a fixing element is installed on the upper end of the polypropylene pipe, applied around the entire circumference by soldering, which prevents the spring from expanding and is equal to the outer diameter of the thread of the upper sleeve, a rubber seal is installed between the upper sleeve and the fixing element ring.

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