CZ2000399A3 - Plastic plumbing ball valve with removable internal metallic control system - Google Patents

Abstract

The invention relates to a plastic ball valve for water supply installations with interior, removable set of controls that consists of a plastic cylinder (3) with an interior metal set of controls with a spherical obturator (1), said obturator being rotatably received on a common axis (o) and being rotatably received in opposite ball sockets (2, 2'). Said obturator is provided with a throughflow opening (19) and with a guide groove (20). The inventive valve is characterized in that a disassembly opening (5) is formed in the zone of the guide groove of the spherical obturator (1) on a common axis (o) of the interior metal set of controls, the pair of opposite ball sockets (2, 2') being replaceable by a pair of spacer ball sockets (15, 15'). The disassembly opening (5) is alternatively provided with an interior thread. The inventive plastic ball valve is used for water supply systems, gas pipes, air systems and pipe conduits for similar media. The inventive design allows for a fast and easy repair in the case of a valve malfunction or if a valve has to be replaced.

Description

Plastic plumbing ball valve with removable inner metal actuator assembly.

Technical field

The present invention relates to a plastic plumbing ball valve with a removable inner metal control assembly for water, heating, gas and air distribution systems, which can be installed in both external and masonry piping.

BACKGROUND OF THE INVENTION

In the field of plumbing, gas, air systems and other similar media, a wide range of ball valve designs are known, which are mounted in such a way that the inlet and outlet parts of the valves are screw-mounted, especially for all-metal versions. parts.

Replacement of such valve designs, which are designed to be non-detachable, is very difficult due to the laborious intervention of the piping system in case of failure or malfunction during contamination or maintenance.

In the plastic version of the piping system, combined ball valves are installed, which consist of a plastic sleeve mounted on the end part of the pipeline, most often by means of polyfusion welding technology and, in rare cases, by screwing with plastic-metal threads. The plastic valve housing usually contains metal and most often brass control non-detachable assemblies, which are also difficult to replace and repair difficult if necessary.

In the two basic valve types described above, when integrated into the masonry, replacement is even more difficult, since it is necessary to uncover the masonry and any tiles and heal them, which leads to operational downtime and requires additional crafts beyond plumbing and other repair technologies.

The purpose of the invention is to provide such a water-installation ball valve which minimizes the above-mentioned disadvantages and is easily repairable if necessary without complicated removal of the entire valve and interference with the piping system or the masonry object in which the distribution system is installed.

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SUMMARY OF THE INVENTION

The above-mentioned disadvantages are largely eliminated and the purpose of the invention is achieved by providing a plastic plumbing ball valve with a removable inner metal control assembly consisting of a plastic valve housing provided with oppositely located connection sockets between which a cavity of the inner metal control assembly is formed transversely to the flow direction on a common axis consisting of a spherical closing body provided with a through hole and rotatably mounted in a pair of opposing pans, wherein a control groove is formed in the upper part of the spherical surface of the spherical closing body into which the lower end lip of the rotatably mounted shaft is provided; a locking member and a valve cap pushed through at the opposite end, the outer end portion of the control shaft being provided with a safety groove with a fuse and a shaped end of the valve control handle and / or valve control key according to the invention, characterized in that at the location of the control groove of the spherical closure body, a disassembly opening is formed in the common axis of the inner metal control assembly; behind the pair of spacers. Alternatively, the removal hole of the spherical closure body is internally threaded. Alternatively, the actuator stem is replaceable by an axially elongated stem, and the valve closure is alternatively replaceable by an axially elongated valve closure, wherein the extended valve closure is provided with an external thread of a protective housing receiving the valve control key.

The advantage of the plastic water-installation ball valve according to the invention is that, in the event of its failure or contamination, it is easy to remove its inner metal control assembly, without the need to remove the plastic valve housing from the pipeline. Similarly, the removal of the inner metal control assembly can be performed even when the plastic valve housing, including the piping system, is integrated into the masonry object without the masonry surrounding the valve having to be disturbed. To remove the inner metal control assembly, if the removable bore of the ball closure body is internally threaded, a pull-out tool in the form of a standard tightening tool with a screw thrust rod and support can be used. If the removal hole of the ball valve body is not internally threaded, pull-out collets can be used for the same purpose. The embodiment according to the invention also has advantages when remote control actuators such as actuators, electric motors and other similar devices are connected to the valves, and easy and quick disassembly and assembly during repair work is desirable.

Summary of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the plastic plumbing ball valve in assembled state and on a common axis shown by the individual components of the inner metal control assembly; FIG. 2 is a plan view of the locking member; and FIGS. Fig. 5 is a partial cross-sectional view of an alternative embodiment of a plastic plumbing ball valve suitable for integration into masonry and provided with a protective cap; and Fig. 6 is a plan view of the valve control valve in plan view.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1, there is shown an assembled plastic plumbing ball valve comprising a plastic valve housing 3 in which oppositely disposed connection sleeves 14, 14 'are formed into which the end portions of the plastic pipe are fastened by polyfusion welding. Between the connection sleeves 14, 14 'there is formed a cavity of the inner metal control assembly, which is transverse to the flow direction t in the common axis o. The inner metal control assembly preferably made of brass consists of a spherical closure body 1 in which a flow opening 19 is formed and which is accommodated in a pair 2, 2 'of opposing pans, which are preferably made of teflon. This pair of opposing shells 2, 2 'is replaceable by a pair 15, 15' of the shells shown in Figs. 3 and 4, which differ both in their thickness and the approach angle a ', where the thicknesses b, b' of the pair 15, 15 The distance pans are smaller than the thicknesses a and ^{1 of the} pair 2, 2 'of the opposite pans as well as the lead-in angle a' for the pair of distance pans 15, 15 'less than the lead-in angle gu of the pair 2, 2' of the opposite pans. A control groove 20 is formed on the top of the spherical surface of the spherical closing body 1, in which the lower end lip 6 of the control shaft 8 is provided with sealing rings 12, 12 ', at the opposite end of which the locking groove 9 is formed. A removable bore 5 is provided in the spherical closure body 1 at the location of the control groove 20 in the common axis o, which can alternatively be provided with a female thread. Between the shoulder 21 of the actuating shaft 8 of the upper part of the spherical surface of the spherical closure body 1, a locking member 4, whose shape is shown in FIG. 2 in plan view, is inserted on a common axis. The upper part of the plastic valve housing 3 is closed by a valve closure 7, on the shaped end of which a control handle 10 is fitted, which is secured by a fuse 9 and a pressure cap 11 made of plastic and in a color finish corresponding to a standardized medium.

Fig. 5 shows an alternative embodiment of a plastic water installation ball valve according to the invention, which is intended together with a pipe system for integration into masonry. Depending on the depth of embedding in the masonry, the length of the extended actuator stem 8j and the length of the extended valve closure 7 'can be adapted to the outer thread 16 of which the outer protective cover 18 is fixed. 6 is a plan view of FIG. 6. The other parts of the plastic plumbing ball valve are identical to the embodiment of FIG. 1 including the plastic valve housing 3 and the spherical closure body and its mounting.

The removal of the inner metal control assembly from the plastic valve housing 3 of the basic embodiment according to FIG. 1 consists in that the pressure cover 11 and the control handle 10 are first removed by axial pull and the fuse 9 is removed. The valve cap 7, the actuator stem 8 and the locking member 4 are then removed. By means of a pulling device provided with a threaded pull rod with support in the case of an internally threaded dismounting hole 5 or a pull-out collet, the spherical closing body 7 can be removed from its seating between a pair 2, 2 'of opposing pans. Since the primary production of the plastic plumbing ball valve is hot, a pair 2, 2 'of opposing pans is inserted into the plastic valve housing 3 in a preselected dimension which, after cooling and shrinking the plastic valve housing 3, ensures optimum contact with the spherical surface of the spherical shutter. In the reassembly of the spherical closure body 1 for repairs, all work is carried out cold and it is therefore necessary to use a dimensionally different pair 15, 15 'of shells whose thicknesses b, b' are smaller than the thicknesses a, a * a pair of 2.2 * opposite pans originally inserted, as well as the lead-in angle and the 'pair of 15,15' spacers are smaller than the lead-in angle and the pair of 2,2 'opposing pans, since the re-installation of the original pair 2.2' ' The opposing pans would be difficult to overcome during reassembly when inserting the spherical closure body 1, and a smaller approach angle θ facilitates this reassembly. The other reassembly procedure is carried out in reverse order to disassembly.

In an alternative embodiment of the plastic plumbing ball valve of FIG. 5 integrated into the masonry and provided with an outer protective cap 18, removal of the inner metal control assembly is performed by first removing it from the extended valve closure T_ outer protective cap 18 screwed onto the outer thread 16 of the extended valve closure 7. and supported in the retracted state by its peripheral abutment edge on the masonry plane. Then the disassembly and assembly is exactly the same as in the basic design of the plastic water installation ball valve according to Fig. 1.

Claims (3)

PATENT CLAIMS A plastic plumbing ball valve with a removable inner metal control assembly comprising a plastic valve housing provided with oppositely disposed connection sockets between which a cavity of the inner metal control assembly is formed transverse to the flow direction of the medium on a common axis consisting of a spherical closing body provided a through-hole and rotatably mounted in a pair of opposing pans, wherein a control groove is formed in the upper portion of the spherical surface of the spherical closing body, into which a lower end lip of a rotatably mounted control shaft provided with sealing rings is inserted; wherein the outer end portion of the control shaft is provided with a locking groove with a fuse and a shaped end of the control handle and / or an operating key The valve is characterized in that at the location of the control groove (20) of the spherical closure body (1), a disassembly opening (5) is formed in a common axis (o) of the inner metal control assembly, the pairs (2, 2) of opposing shells being replaceable. (15, 15) spacers. Plastic water-installation ball valve according to claim 1, characterized in that the removal opening (5) of the ball closure body (1) is alternatively internally threaded. Plastic water plumbing ball valve according to claim 1 and 2, characterized in that the actuating stem (8) is alternatively replaceable by an axially extended stem (8) and the valve closure (7) is alternatively replaceable by an axially extended valve closure (7 '), the elongated valve cap (7 ') is provided with an external thread (16) of the outer protective cap (18) in which the valve control key (17) is received.