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Rust-proof gate valve with high sealing performance

A technology of high sealing and gate valves, applied in shaft sealing, valve details, valve devices, etc., can solve the problems of poor sealing of gate valves, and achieve the effect of improving sealing performance, improving overall mechanical strength, and not easy to slide

Pending Publication Date: 2021-11-05
铜陵荣景科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Pass butyl rubber on an open mill, add zinc oxide, stearic acid, naphthenic oil and sulfur to obtain butyl rubber compound, pass natural rubber on an open mill, add zinc oxide, Stearic acid, anti-aging agent and sulfur are uniformly mixed, and the sheet is produced to obtain a natural rubber compound. The natural rubber compound and butyl rubber compound are mixed and vulcanized to obtain the sealing layer. By preparing the sealing layer , which solves the problem of poor sealing performance of existing gate valves;

Method used

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  • Rust-proof gate valve with high sealing performance
  • Rust-proof gate valve with high sealing performance
  • Rust-proof gate valve with high sealing performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] according to Figure 1-3 As shown, this embodiment is a high-tight anti-rust gate valve, including a handle 1, a valve stem 3 and a valve body 6, the valve stem 3 is installed in the valve body 6, and the top of the valve stem 3 runs through the valve body 6, A handle 1 is installed on the top of the valve stem 3, a ball 5 is installed on the bottom of the valve stem 3, and a protective layer 2 is arranged between the valve stem 3 and the valve body 6, and the protective layer 2 includes a sealing layer 7 and an antirust layer 4;

[0037] Wherein the preparation steps of sealing layer 7 are as follows:

[0038]S1: Thinly pass butyl rubber on the open mill for 4 times, add zinc oxide, stearic acid, naphthenic oil and sulfur, mix completely on the open mill, widen the roller distance to press out the rubber sheet, and obtain the butyl rubber mixture. rubber mixing;

[0039] S2: pass the natural rubber on the mill for 3 times, add zinc oxide, stearic acid, anti-aging age...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is:

[0047] Wherein the preparation steps of sealing layer 7 are as follows:

[0048] S1: Thinly pass butyl rubber on the open mill for 4 times, add zinc oxide, stearic acid, naphthenic oil and sulfur, mix completely on the open mill, widen the roller distance to press out the rubber sheet, and obtain the butyl rubber mixture. rubber mixing;

[0049] S2: pass the natural rubber on the mill for 4 times, add zinc oxide, stearic acid, anti-aging agent, sulfur, mix evenly, and produce a sheet to obtain a natural rubber compound;

[0050] S3: Mix natural rubber compound and butyl rubber compound, blend and knead on the open mill at room temperature for 15 minutes, park for 24 hours, and carry out crosslinking in a flat vulcanizer. The set temperature during vulcanization is 155 ° C. The pressure is 20MPa, and the time is 100 minutes to obtain the sealing layer 7;

[0051] Wherein the preparation steps of antirust la...

Embodiment 3

[0056] The difference between this embodiment and embodiment 1 is:

[0057] Wherein the preparation steps of sealing layer 7 are as follows:

[0058] S1: Thinly pass butyl rubber on the open mill for 3 times, add zinc oxide, stearic acid, naphthenic oil and sulfur, mix completely on the open mill, widen the roller distance to press out the rubber sheet, and obtain the butyl rubber compound. rubber mixing;

[0059] S2: pass the natural rubber on the mill for 3 times, add zinc oxide, stearic acid, anti-aging agent, sulfur, mix evenly, and release the flakes to obtain the natural rubber compound;

[0060] S3: Mix the natural rubber compound and butyl rubber compound, blend and knead on the open mill at room temperature for 15 minutes, park for 24 hours, and carry out crosslinking in a flat vulcanizer. The temperature set during vulcanization is 145-155°C , using a pressure of 20 MPa and a time of 100 minutes to obtain the sealing layer 7;

[0061] Wherein the preparation steps...

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Abstract

The invention discloses a rust-proof gate valve with high sealing performance, and relates to the field of gate valves. The rust-proof gate valve comprises a handle, a valve rod and a valve body, the valve rod is mounted in the valve body, the top of the valve rod penetrates through the valve body, the handle is mounted at the top of the valve rod, a ball is mounted at the bottom of the valve rod, and a protective layer is arranged between the valve rod and the valve body. The problems that an existing gate valve is poor in sealing performance and prone to rusting are solved, a rust-proof layer has the lower water absorption capacity compared with traditional resin, a polybenzoxazine and Si-O-Si double-crosslinking network exists in the rust-proof layer, the structure of the rust-proof layer can be more compact, the Si-O-Si network is also a polymer network good in hydrophobicity, the compact double-crosslinking network can inevitably and effectively inhibit water permeation, and the rust-proof layer can effectively prevent water permeation on the surface and in a main network, so that the permeation rate of water in a coating is obviously reduced, and the coating can have good corrosion resistance in a humid environment.

Description

technical field [0001] The invention relates to the field of gate valves, in particular to a high-tight antirust gate valve. Background technique [0002] The gate valve is a device that controls the flow of water through the opening and closing parts. When controlling the opening or closing of the gate valve, the staff can drive the valve stem to move by rotating the handwheel. [0003] In the actual use process, there will be water vapor between the valve stem and the matching middle hole. The accumulation of water vapor will easily lead to rusting of the valve stem and the inner wall of the middle hole, which will affect the free rotation of the valve stem. In severe cases, directly There will be rusting and jamming. At this time, if the valve stem is directly rotated by the handwheel, it may directly cause the valve stem to break. If the valve stem breaks in the middle hole, it will cause the entire valve to be scrapped. And the sealing performance of the existing gate ...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K41/04C08L7/00C08L23/22C08K13/02C08K3/22C08K5/09C08K3/06C09D161/34C09D5/08
CPCF16K5/0657F16K5/0694F16K41/046C08L7/00C09D161/34C09D5/08C08K2003/2296C08L23/22C08K13/02C08K3/22C08K5/09C08K3/06
Inventor 阮超张志林张凌兵张志成
Owner 铜陵荣景科技有限公司
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