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Chain applicable to low temperature environments and production method thereof

A low-temperature environment and chain technology, which is applied in the direction of metal chains, chain rings, transmission chains, etc., can solve the problems of poor reliability, short service life, and low production efficiency, so as to improve the stress situation, improve the processing technology, and prolong the service life. Effect

Active Publication Date: 2014-07-02
HANGZHOU DONGHUA CHAIN GRP
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Problems solved by technology

[0002] At present, there are two types of chains that use ordinary standard chains and stainless steel chains in low temperature environments, especially those used in drilling equipment with high strength requirements for dust and impact. The materials used in standard chains are prone to cold in low temperature environments. The stainless steel chain overcomes the low-temperature cold and brittle phenomenon, but its strength cannot meet the requirements of high-strength loads. For users, the chain often breaks and must be replaced frequently. The service life is short and the reliability is poor. High cost and low production efficiency for users

Method used

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  • Chain applicable to low temperature environments and production method thereof
  • Chain applicable to low temperature environments and production method thereof

Examples

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Embodiment 1

[0013] like figure 1 , figure 2 A chain suitable for low-temperature environments is shown, including an outer chain plate 1, a pin shaft 2, an inner chain plate 3, a sleeve 4 and a middle chain plate 5 made of low-temperature-resistant alloy high-quality steel. The interference fit of chain plate 3 and two sleeves 4 forms an inner chain link, and the interference fit of two middle chain plates 5 and pin shaft 2 forms an outer pin, and a plurality of inner chain links and a plurality of outer pins are assembled in series. The outer chain plates 1 at both ends of the cover are sequentially connected to form a chain; the sleeve 4 is filled with low-temperature grease, and the two ends of the pin shaft 2 respectively pass through the sleeve 4 and the outer chain plate 1 and are locked and fixed by square riveting heads; The outer chain plate 1, the inner chain plate 3 and the middle chain plate 5 all adopt a wide waist structure, and the surface of the pin shaft 2 has a highly ...

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Abstract

The invention discloses a chain applicable to low temperature environments and a production method thereof. The chain comprises outer link plates, pins, inner link plates, sleeves and middle ink plates, all made of alloy high-quality steel resistant to low temperature. One inner link joint is composed of two inner link plates and two sleeves by interference fitting; one outer pin plate is composed of two middle link plates and one pin by interference fitting. The chain is formed by serially linking the inner link joints and the outer pin plates and covering with end outer link plates and by sequential connecting. The inside of each sleeve is fully coated with low-temperature grease. Two ends of each pin penetrate the corresponding sleeves and the outer link plates and are fixedly locked with square rivets. The outer link plates, the inner link plates and the middle link plates are all in wide-waist structures. The surface of each pin is provided with a high-hardened layer. The chain according to the technical scheme has the advantages that strength of the chain is improved, service life of the chain is prolonged and the chain is well reliable.

Description

technical field [0001] The patent of the present invention relates to a chain for drilling equipment transmission, especially an ultra-high-strength chain suitable for harsh environments such as low temperature, dust, and impact, and a preparation method thereof. Background technique [0002] At present, there are two types of chains that use ordinary standard chains and stainless steel chains in low temperature environments, especially those used in drilling equipment with high strength requirements for dust and impact. The materials used in standard chains are prone to cold in low temperature environments. The stainless steel chain overcomes the low-temperature cold and brittle phenomenon, but its strength cannot meet the requirements of high-strength loads. For users, the chain often breaks and must be replaced frequently. The service life is short and the reliability is poor. For users, the cost is high and the production efficiency is low. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): F16G13/07F16G15/14B21L9/00
Inventor 张健聪王丽丽邵慧敏胡立成柯耀星宣碧华
Owner HANGZHOU DONGHUA CHAIN GRP
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