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Plastic stop valve

A cut-off valve, plastic technology, applied in the direction of valve lift, valve details, valve device, etc., can solve the problems of inability to replace the valve stem, water leakage, etc., reduce the use of metal materials, ensure normal service life, and facilitate maintenance and replacement operations Effect

Inactive Publication Date: 2020-06-09
罗荣森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem is that because the valve stem is thin and sticks out of the valve body, it is occasionally damaged, but the valve stem cannot be replaced.
Now it seems that two seals have two risks of water leakage

Method used

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  • Plastic stop valve
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Such as Figure 1-23 As shown, the structure of the plastic globe valve in this example includes a bonnet connection insert cap 6, a valve disc 9, a valve stem 7 with an extended operating end, and a plastic valve body 1, and a valve seat is arranged in the plastic valve body 1. The valve seat has a valve seat opening 10, and the two ends of the plastic valve body 1 respectively have an inlet port 5 and an outlet port 8 communicating with the valve seat opening 10, and the inlet port 5 and the outlet port 8 are hot-melt Socket-type interface, the disc 9 has a disc rod 4, the disc rod 4 is located in the through hole of the valve cover connecting insert 3, the external thread of the valve rod 7 cooperates with the internal thread of the disc rod 4 and constitutes a kinematic pair The rotation of the valve rod 7 drives the valve disc rod 4, which is restricted to rotate, to lift the valve disc 9 and cooperate with the valve seat opening 10 to form a switch. The through ho...

Embodiment 2

[0074] Such as Figures 24 to 29 shown. The basic structure of the plastic globe valve in this example is similar to that of Embodiment 1, the difference is that the upper part of the valve stem 7 of the plastic globe valve in this embodiment is fixed with a hand wheel 18, and the outer wall of the valve cover connecting insert 3 is sleeved with The bonnet connecting insert sealing cover 12, the external thread of the bonnet connecting insert 3 is matched with the internal thread of the bonnet connecting insert sealing cover 12 through the outer wall, and the bonnet connecting insert sealing cover 12 is matched with the internal thread of the bonnet connecting insert sealing cover 12. A bonnet connection insert O-ring 13 is provided between the plastic connection transition piece 2 and the outer wall of the bonnet connection insert 3 .

Embodiment 3

[0076] Such as Figures 30-38 shown. The basic structure of the plastic globe valve in this example is similar to that of Embodiment 2, the difference is that there is an anti-loose gasket 15 between the bonnet connection insert cap 6 and the bonnet connection insert 3, and the anti-loose gasket 15 has two anti-rotation extensions 16 , and the valve cover connecting insert 3 has an anti-rotation groove 17 cooperating with the anti-rotation extensions 16 .

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Abstract

The invention discloses a plastic stop valve. The plastic stop valve comprises a valve deck connecting insert cap, a valve clack, a valve rod with an outwards-extending operation end and a plastic valve body, wherein a valve seat is arranged in the plastic valve body and provided with a valve seat opening, and the two ends of the plastic valve body are provided with a flow inlet and a flow outletcommunicating with the valve seat opening correspondingly; the valve clack is provided with a valve clack rod, the valve clack rod is located in a through hole of a valve deck connecting insert, and external threads of the valve rod are matched with internal threads of the valve clack rod to form a kinematic pair; the valve clack rod limited to rotate is driven by rotation of the valve rod to enable the valve clack to ascend and descend and be matched with the valve seat opening to form a switch, the through hole of the valve deck connecting insert is smaller than the valve clack, a transitionconnecting opening in the top of the plastic valve body and a plastic connecting transition piece with the valve deck connecting insert are bonded and fixed into a whole through hot melting, the valve clack is limited in the plastic valve body; and a valve rod O-shaped sealing ring is arranged between the detachable valve rod and the valve deck connecting insert, and the detachable valve rod is limited in the valve deck connecting insert by the valve deck connecting insert cap in threaded connection with the valve deck connecting insert.

Description

technical field [0001] The invention relates to a plastic shut-off valve used in conjunction with plastic water supply pipes, especially suitable for, but not limited to, polyethylene (PE, PE-RT), polypropylene (PP, PPR), polybutylene (PB) and For polyolefin plastic water supply pipes such as steel-plastic composite pipes, the plastic shut-off valves include but are not limited to plastic shut-off valves using metal discs. Background technique [0002] The globe valve is a widely used switch for fluid pipelines. Since polyolefin plastic pipes based on polypropylene (PP, PPR), polyethylene (PE, PE-RT), and polybutene (PB) can have advantages that metal pipes do not pollute water quality, At present, water supply pipes using polyolefin plastics have been widely used in many fields. The plastic globe valve with the same advantages can be directly connected to the plastic pipe with a hot-melt socket interface, avoiding the use of flanges and other similar joints during the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K27/02F16K27/12F16K1/32F16K41/04
CPCF16K1/32F16K27/02F16K27/0254F16K27/12F16K41/04
Inventor 罗荣森罗荣尧
Owner 罗荣森
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