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Pinch valve tube, method for manufacturing the same, and pinch valve

A technology of pinch valves and rubber tubes, which is applied in the direction of pipes/pipe joints/fittings, parts in contact between valve elements and valve seats, pipes, etc. Long-term problems, to achieve high productivity, excellent response speed, low cost effect

Inactive Publication Date: 2016-03-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, fluorine rubber generally has high adhesiveness, so when it is used as a pinch valve for repeated opening and closing, the slow response speed from closing to opening is particularly problematic.
That is, ordinary fluororubber tubes have the problem of long response time and low response speed due to the adhesiveness of fluororubber. , Utilizing its own elasticity to restore the tube to actually open the flow path to a specific state
[0007] However, in applications using pinch valves, it is often required to quickly send a small amount of fluid or stop it, so the low response speed is a problem.

Method used

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  • Pinch valve tube, method for manufacturing the same, and pinch valve
  • Pinch valve tube, method for manufacturing the same, and pinch valve

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Embodiment

[0072]

[0073] 30 parts by mass of carbon black, calcium hydroxide 6 parts by mass and 3 parts by mass of magnesium salt were kneaded, molded into a tube at 182°C after kneading, and at the same time made a primary crosslinking to make a fluororubber tube.

[0074]

[0075] As the polyol-based crosslinking agent, two substances, bisphenol AF and a salt having a mass ratio of benzyltriphenylphosphonium and bisphenol AF of 1:1, were used in combination at a mass ratio of 1.52 / 0.48.

[0076] Furthermore, the two polyol-based crosslinking agents were dissolved in a mixed solvent with a mass ratio of acetone and methanol of 1 / 1 at the concentrations shown in Table 1 below to prepare a crosslinking agent solution.

[0077]

[0078] According to the way that the cross-linking agent solution enters the flow path, immerse the previously prepared fluororubber tube as a whole into the cross-linking agent solution prepared above, and lift it up after standing at room temperature fo...

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Abstract

A pinch valve tube according to the present invention includes a fluororubber tube, the entirety of which is formed integrally of fluororubber and having an internal cavity arranged as a flow passage for a fluid, and a crosslink density of the fluororubber forming an inner surface of the flow passage is made higher than an average crosslink density of the entirety.

Description

technical field [0001] The present invention relates to a pinch valve tube assembled in a pinch valve to constitute a fluid flow path, a method of manufacturing the same, and a pinch valve incorporating the pinch valve tube. Background technique [0002] A pinch valve is known as a valve (valve) for controlling the flow of fluid. The pinch valve is provided with a soft tube (tube for pinch valve) with an internal cavity as a fluid flow path and a manual or electric opening and closing valve. The opening and closing mechanism is used to switch between the state of closing the flow path by pressing the tube in the radial direction and the state of opening the flow path by releasing the pressure [0003] The pinch valve does not come into contact with the fluid except for the inner surface of the tube constituting the flow path. Therefore, for example, by replacing the tube after use, the flow path can always be kept clean and cross-contamination of the fluid can be prevented. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K7/02F16L9/12
CPCF16K7/02F16L9/12B29C71/0009B29C35/0266C08J7/12F16K25/005B29C2071/0018C08J2327/16F16K7/04F16L11/04C08F114/22
Inventor 藤本健太郎
Owner SUMITOMO RUBBER IND LTD
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