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Heat-resisting and anti-ageing rubber sealing gasket for plate-type heat exchanger

A plate heat exchanger and rubber sealing technology, which is applied to heat exchanger sealing devices, indirect heat exchangers, heat exchanger types, etc. The sealing function of the gasket is reduced, and the effect of excellent heat resistance, good sealing performance and good sealing performance is achieved.

Inactive Publication Date: 2017-07-25
ANHUI PROPELLENT HEAT TRANSFER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat resistance and aging resistance of existing heat exchanger sealing gaskets are not enough, so that when it is connected with the metal plate, the gasket is easy to move and deviate from the sealing groove, so that the sealing function of the gasket is reduced, or even completely fails to cause leakage. Seriously affect the performance of the plate heat exchanger

Method used

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  • Heat-resisting and anti-ageing rubber sealing gasket for plate-type heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A heat-resistant and aging-resistant rubber sealing gasket for a plate heat exchanger, made of the following raw materials in parts by weight: 52 parts of EPDM rubber, 15 parts of methyl vinyl silicone rubber, 4 parts of ACR resin, and gas phase white carbon black 2 parts, 1 part of tetraacicular zinc oxide whisker, 1.2 parts of γ-aminopropyltriethoxysilane, 1.5-2 parts of magnesium hydroxide, 1.2 parts of magnesium stearate, rare earth oxide Ce 2 o 3 0.07 parts, 2 parts of dicumyl peroxide, 1.2 parts of accelerator, 0.6 parts of pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate.

[0020] The above-mentioned methyl vinyl silicone rubber has an average molecular weight of 500,000-700,000 and a vinyl content of 0.07-0.12 mol%.

[0021] The particle size of the above-mentioned fumed white carbon black is 40-60nm.

[0022] The above-mentioned accelerator is formed by mixing 2-mercaptobenzothiazole and thiuram at a mass ratio of 2:1.

Embodiment 2

[0024] A heat-resistant and aging-resistant rubber sealing gasket for a plate heat exchanger, which is made of the following raw materials in parts by weight: 45 parts of EPDM rubber, 10 parts of methyl vinyl silicone rubber, 5 parts of ACR resin, and gas phase white carbon black 3 parts, 0.5 parts of tetraacicular zinc oxide whiskers, 1.5 parts of γ-aminopropyltriethoxysilane, 1 part of magnesium hydroxide, 1 part of magnesium stearate, rare earth oxide La 2 o 3 0.08 parts, 1.5 parts of dicumyl peroxide, 1.2 parts of accelerator, 0.8 parts of 2,2'-methylenebis-(4-methyl-6-tert-butylphenol).

[0025] The above-mentioned methyl vinyl silicone rubber has an average molecular weight of 500,000-700,000, and a vinyl content of 0.07-0.12mol%;

[0026] The particle diameter of the above-mentioned fumed white carbon black is 50-70nm.

[0027] The above-mentioned accelerator is formed by mixing 2-mercaptobenzothiazole and thiuram at a mass ratio of 2:1.

Embodiment 3

[0029] A heat-resistant and aging-resistant rubber sealing gasket for a plate heat exchanger, made of the following raw materials in parts by weight: 65 parts of EPDM rubber, 15 parts of methyl vinyl silicone rubber, 7 parts of ACR resin, and gas phase white carbon black 2.5 parts, 1.5 parts of tetrapod zinc oxide whiskers, 0.8 parts of γ-aminopropyltriethoxysilane, 1.8 parts of magnesium hydroxide, 0.8 parts of magnesium stearate, rare earth oxide Y 2 o 3 0.05 parts, 2 parts of dicumyl peroxide, 1.5 parts of accelerator, 0.7 parts of pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate.

[0030] The above-mentioned methyl vinyl silicone rubber has an average molecular weight of 500,000-700,000, and a vinyl content of 0.07-0.12mol%;

[0031] The particle size of the above-mentioned fumed white carbon black is 40-60nm.

[0032] The above-mentioned accelerator is formed by mixing 2-mercaptobenzothiazole and thiuram at a mass ratio of 2:1.

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Abstract

The invention provides a heat-resisting and anti-ageing rubber sealing gasket for a plate-type heat exchanger. The rubber sealing gasket is prepared from the following raw materials in parts by weight: 45 to 65 parts of ethylene propylene diene monomer, 10 to 18 parts of methylvinyl silicone rubber, 3 to 7 parts of ACR resin, 1 to 3 parts of gas-phase white carbon black, 0.5 to 1.5 parts of tetrapod-like zinc oxide whiskers, 0.8 to 1.5 parts of gamma-aminopropyltriethoxysilane, 1 to 2 parts of magnesium hydroxide, 0.8 to 1.5 parts of magnesium stearate, 0.05 to 0.1 part of rare-earth oxide, 1.5 to 2.5 parts of dicumyl peroxide, 1 to 1.5 parts of an accelerant and 0.5 to 0.8 part of an antioxidant. The rubber sealing gasket provided by the invention has excellent comprehensive properties, has excellent heat resistance and anti-ageing property and also has good mechanical strength; the rubber sealing gasket can still keep a good sealing property when being used at high temperature for a long period; meanwhile, when the rubber sealing gasket is connected with a metal plate sheet of the plate-type heat exchanger, the gasket does not easily move or leave away from a sealing groove and the sealing property is good.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a heat-resistant and aging-resistant rubber sealing gasket for a plate heat exchanger. Background technique [0002] The plate heat exchanger is a new type of high-efficiency heat exchanger composed of a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat exchange is performed through the plates. Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-vapor heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, convenient installation and cleaning, wide application and long service life. [0003] At present, the sealing gasket between the heat exchange plates can make the inspection and maintenance of the plate heat exchanger more rapid, and the gasket can be replaced conveniently and quickly on the spot. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L83/07C08L33/04C08K13/04C08K3/36C08K7/08C08K5/544C08K3/22C08K5/098F28D9/00F28F11/00
CPCC08L23/16C08K2003/221C08K2003/2213C08K2201/003C08K2201/011C08L2201/08C08L2205/03F28D9/00F28F11/00C08L83/04C08L33/04C08K13/04C08K3/36C08K7/08C08K5/544C08K2003/2224C08K5/098C08K3/22
Inventor 张凌霞
Owner ANHUI PROPELLENT HEAT TRANSFER TECH CO LTD
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