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A non-return joint for chemical discharge

A chemical, non-return technology, applied in the direction of pipes/pipe joints/fittings, connections with fluid cut-off devices, parts in contact between valve elements and valve seats, etc., can solve the problem of damage to corrosion-resistant elastic materials, contamination of chemical Products, unsuitable for high-purity electronic chemicals, etc., to simplify the structure and reduce the chance of contamination

Active Publication Date: 2018-04-24
JIANGYIN JIANGHUA MICROELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after long-term use, the corrosion-resistant elastic material will inevitably be damaged, and the damage will not be easily noticed by the operator, so there is a hidden danger of polluting chemicals, and it is not suitable for the output of high-purity electronic chemicals.

Method used

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  • A non-return joint for chemical discharge
  • A non-return joint for chemical discharge
  • A non-return joint for chemical discharge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 with 2 As shown, the non-return joint for chemical discharge of embodiment 1 includes a polymer check valve core 1 and a first joint 2 and a second joint 3 with a central through hole, and the discharge end of the second joint 3 It is sleeved in the feed end of the first joint 2 and is connected in a sealed manner. The discharge port diameter of the first joint 2 is smaller than that of the feed port. The inner surface of the first joint 2 and the discharge end surface of the second joint 3 form a cavity A check valve core 1 is provided with a middle clearance fit. The check valve core 1 includes a first baffle 11, a polymer compression spring 12, and a second baffle 13, which are connected in sequence, and the first baffle 11 exits toward the first joint 2. A discharge hole 14 is provided between the material end and the inner surface of the first joint 2, the second baffle 13 faces the discharge end of the second joint 3, and the second baffle 13 is san...

Embodiment 2

[0037] Such as image 3 As shown, the difference between embodiment 2 and embodiment 1 is that the feed end of the second joint 3 is provided with a flange 5 protruding to the outer periphery, and the outer periphery of the second joint 3 is provided with a movable joint 6 in a clearance fit, and the movable joint 6 is located on the convex Between the rim 5 and the first joint 3, the movable joint 6 is used to connect with a chemical discharge pipe or a packaging barrel.

[0038] A guide block 7 is provided on the surface of the second baffle 13, the first sealing ring 4a is sleeved on the outer circumference of the guide block 7, and the protruding end of the guide block 7 is matched with the discharge port of the second joint.

[0039] The top surface or side surface of the first baffle 11 is provided with a lug 9, and the discharge hole is enclosed by the lug 9, the first baffle 11 and the inner surface of the first joint 2.

[0040] The central through hole of the first joint 2 ...

Embodiment 3

[0043] Such as Figure 4 As shown, the difference between Embodiment 3 and Embodiment 2 is that a convex ring 10 is provided on the outer surface of the second joint 3, and a second sealing ring 4b is provided on the annular surface of the convex ring 10 facing the feeding end surface of the first joint 2. The second sealing ring 4b is sandwiched between the convex ring 10 and the feeding end surface of the first joint 2.

[0044] The ratio of the wire diameter of the compression spring to the inner diameter and pitch of the compression spring is 1:7:2, and the model of the polymer material made of polyvinylidene fluoride is Kynar PVDF 100HD.

[0045] When the ratio of the wire diameter of the compression spring to the inner diameter of the compression spring is less than 1:8 and the pitch is less than 1:3, the deformation force of the compression spring is small, the spring flexibility is relatively large, and the rigidity is insufficient. When the ratio of the wire diameter of t...

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Abstract

The invention discloses a check joint for discharging chemicals. The check joint comprises a check valve core made of a high polymer material as well as a first joint and a second joint which are provided with central through holes; the discharging end of the second joint sleeves the inside of the feeding end of the first joint and is connected with the feeding end in a sealing manner; the aperture of a discharge opening of the first joint is smaller than that of a feed opening; the check valve core is arranged in a cavity defined by the inner surface of the first joint and the discharging end face of the second joint in an interference fit manner; the check valve core comprises a first baffle, a compression spring and a second baffle which are sequentially connected; the first baffle faces the discharging end of the first joint; a discharging hole is formed between the first baffle and the inner surface of the first joint; the second baffle faces the discharging end of the second joint; a first sealing ring is clamped between the second baffle and the discharging end face of the second joint. By means of the compression spring made of the high polymer material, the structure of the valve core is simplified; meanwhile, the possibility that the chemicals, in particular to high-purity electronic chemicals are polluted is reduced.

Description

Technical field [0001] The invention relates to the technical field of joints for chemicals, in particular to a non-return joint for chemical discharge. Background technique [0002] Chemical packaging barrel check joints are mainly used in chemical discharge operations. One end of the joint is directly connected to the mouth of the chemical packaging barrel or through a discharge pipe, and the other end of the joint is connected to the extraction device through a pipe. The fundamental function of the non-return joint is to prevent the residual chemicals in the pipeline from returning to the packaging barrel and avoid unnecessary chemical pollution in the packaging barrel. In the prior art, check valves with compression springs are often used, such as the check valve described in CN203477469, which includes valve body, valve cover, valve clack, compression spring, compression spring sleeve, compression spring retaining groove, sealing ring, and sealing The cover and compression ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L29/00F16K15/02F16K1/36
CPCF16K1/36F16K15/028F16K25/005F16L29/00
Inventor 朱永刚殷福华顾洪卫赵文虎
Owner JIANGYIN JIANGHUA MICROELECTRONICS MATERIAL
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