Patent Application
20230375092
The present technology relates to a valve art and, more particularly, it relates to an improved thermo plastic ball valve assembly.
In today's world industrial sector becomes growing sector and existing industries become improve his technologies day to day. In the industries different types of fluid are used such as hot water. The fluids are passes through the pipes and this type of fluids needed to control as per requirement using the valves. The valve control is easy technique to control the flow of fluid.
The valve controls the flow of the fluid as per requirement of user. There are many types of fluid valves available in the market which control fluid in which the ball valve is also used in the industrial, commercial, agriculture and residential use. The ball type valve is easy to operate and almost all type of fluid and slurry can be handled. The ball valve in the pipeline is mainly used to cut off or distribute a media flow, or to change the direction of a media flow. Due to its compact structure, reliable sealing, easy operation and maintenance, the ball valve is comprehensively applied in various fields.
Thermo plastic ball valves are known shutoff armatures widely and increasingly used and applied in different applications. Thermo plastic ball valves can be operated at a comparatively lower torque of operation/actuation and at the same time, they have a maximum free cross section of flow in their open status of operation.
While valve constructions of conventional type are known in the art, the specific constructions and operational details thereof have not satisfactorily met the needs of industry. In particular, some prior designs have involved very sophisticated and/or cumbersome structures which cause production difficulties and add to the valve costs in conventional type of thermo plastic ball valve. Further, a common disadvantage of all prior art thermo plastic ball valve designs is that they have an issue of sticking of the solvent cement on ball due to less socket length in body and in end plug. Due to such design, the leakage due to PTFE seats in longer operation is observed. Further, in existing state of art, the stem O ring grooves are formed through the direct injection moulding technique which may affects the performance of the valve at long term use. Further in conventional valve, the PTFE rings are directly seated on both side of ball. In such case, there are chances of leakage through PTFE side. Further, during assembling of end-plug to body, the end-plug is cross fitted or slip out because of there is no stopper/guide on end plug.
U.S. Pat. No. 3,540,693A provide a random-entry cartridge type ball valve assembly including a pair of flanged connecting members, and a tubular valve body positioned between the flanged members and secured thereto by a plurality of nut and bolt connections. A valve bail member is rotatably mounted within the valve body and pluralities of annular sealing assemblies are provided within the valve body between the ball member and the flanged connecting members. Each of the sealing assemblies comprises an outer annular retainer and an inner annular seal in engagement with the ball member. A recess is provided between the valve body and each of the connecting members for the purpose of enabling the flanges on the connecting members to be placed under compression by the nut and bolt assemblies to thereby compress the annular seals between the ball member and the flanges to provide an adequate seal between the ball member and the connecting members.
The limitation of the prior art is it does not provide the smooth operation and there is no any PTFE rings are provided so it may be occurrence of leakage of fluid. Further it has possibility of the occurrence of the cross connection or slip-out of the valve to the pipe.
It has, therefore, been desired to develop a Thermo plastic ball valve which obviates or mitigates aforementioned disadvantages.
A main object of the present invention is to provide improved thermo plastic ball valve assembly which is deemed to meet all of the foregoing needs and others.
Another object of present invention is to provide an improved thermo plastic ball valve that gives more safety to the solvent cement joints (in case of PVC/CPVC and ABS) and solve the issue of sticking of the solvent cement on ball.
Further object of the present invention is to provide an improved thermo plastic ball valve wherein the leakage due to PTFE seats is greatly reduced with the new feature of the seating position of the PTFE gaskets.
Yet another object of the present invention is to provide an improved thermo plastic ball valve wherein the stem O ring grooves are machined rather than direct injection moulding which will give superior performance against long term use of the valve.
Another object of the present invention is to provide an improved thermo plastic ball valve which provides easy fitting of end plug of body to the pipe.
Another object of the present invention is to provide an improved thermo plastic ball valve which eliminates the problem of cross fitting or the slip-out of the valve from the pipe.
Another objective of the present invention is to provide an improved thermo plastic ball valve which is smooth to operate and cost effective.
The present invention relates to an improved thermo plastic ball valve assembly which comprises a handle or leverage, a stem, a ball, an end plug, a PTFE (Teflon) seat, a body, an O ring of end plug and an O ring of stem. The improved thermo plastic ball provided with the two O ring grooves in the stem and PTFE seat is provided on the both side of the ball on the groove of the body for eliminating the leakage and smooth operation of the valve. The socket of the body of the valve having more length so that better joining of pipe in socket can be done and eliminating sticking issues of solvent cement on ball. The present invention is easy to be installed, reliable to be sealed, and strong in practicability.
Other objects, advantages and novel features of the invention will become apparent from the following detailed description of the present embodiment when taken in conjunction with the accompanying drawings.
Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of the construction and arrangement of parts illustrated in the accompany drawings. The invention is capable of other embodiment, as depicted in different figures as described above and of being practiced or carried out in a variety of ways. It is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation.
Now, the
The ball (3) is rotatably located in the flow channel of the valve body (6) in which an open condition which permits fluid flow through the flow channel and a closed condition which prevents fluid flow through the flow channel. When the thermo plastic ball valve assembly is open, the ball (3) at the open position, the through passage of the ball (3) is coaxial with the flow channel of the valve body (6), and when the plastic ball valve assembly is closed, the ball (3) at the closed position, the through passage of the ball (3) is perpendicular to the flow channel of the valve body (6). The one end of the valve stem (2) engaged with the handle (1) of the valve, and the other end of the valve stem (2) is connected with the ball (3) for rotating the ball (3).
Referring continuous with
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On the valve body (6) outside diameter there are two flat areas on which are engraved the manufacturer trade mark, the size, the material type, the reference standard and the production calendar. The valve body (6) preferably made from thermo plastic material.
The end plug (4) having spigot or socket utilised for jointing by means of solvent cementing with pipes conform to standard ASTM D2846 SDR11 & ASTM D2467 SCH80 or any other pipe manufacturing standards while on the outside it has a male thread which allows to screw it into the body (6) and groove are provided between the end plug (4) and body (6) for inserting an O-ring of end plug (7) which ensures the tightness and leak proof operation. The end plug (4) has improved seat groove for PTFE (Teflon) seat (5), which arrest PTFE (Teflon) seat (5) from both outside and inside. The end plug also provide circular rib in case of ½″ to 1″ below PTFE (Teflon) seat (5) and provision of providing O-ring (7) below PTFE (Teflon) (5) from 1¼″ to 2″ which provide extra cushioning during open/close function. The PTFE (Teflon) seat (5) is sited on O ring (7) to avoid leakage from the PFTE (Teflon) seat (5) side. In the valve body (6) design, the length of socket or spigot in the both part is increased, as a result batter jointing of pipe and socket using solvent cement and eliminating issues regarding solvent cement sticking in between ball (3) and PTFE (Teflon) seat (5) while assembling.
The PTFE (Teflon) seat (5) is made out of PTFE (poly tetra fluoro ethylene) material which is provided to the both side of the ball (3) on the groove of the body (6) to prevent the leakage in the flow direction.
At the end plug (4) of the valve body (6), the stopper or guide is provided which prevent the valve from the cross fitting or slip out during the assembly. The improved ball Valve having cavity no. engraved on each part i.e. valve body (6), ball (3), stem (2), end plug (4) and handle (1).
The improved thermo plastic ball valve body mould size ½″ to 2″ produced ion fully automatic mode. Due to the fully automatic mode process parameters are stable/uniform from shot to shot and product quality is improved & and defects on product were minimize like burn mark, flow mark etc.
The performance of ball valve by pressure testing has been conducted in the fully automatic mode. In this the automatic pressure testing equipment from low pressure 0.5 bar to high pressure 7.0 bar for 15 minutes conducted and verified by visually for any leakages observed during prescribed duration.
The invention has been explained in relation to specific embodiment. It is inferred that the foregoing description is only illustrative of the present invention and it is not intended that the invention be limited or restrictive thereto. Many other specific embodiments of the present invention will be apparent to one skilled in the art from the foregoing disclosure. All substitution, alterations and modification of the present invention which come within the scope of the following claims are to which the present invention is readily susceptible without departing from the spirit of the invention. The scope of the invention should therefore be determined not with reference to the above description but should be determined with reference to appended claims along with full scope of equivalents to which such claims are entitled.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202021038928 | Sep 2020 | IN | national |
This application claims the benefit of International Application No. PCT/IN2021/050778, filed on Aug. 13, 2021, which claims the benefit of Indian Patent Application 20201038928, filed on Sep. 9, 2020. The entire disclosures of the above applications are incorporated herein by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IN2021/050778 | 8/13/2021 | WO |
