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Eccentric ball valve with liner and preparation method thereof

An eccentric ball and lining technology, which is applied in valve details, valve device, valve shell structure, etc., can solve the problems that the shape is sometimes granular, sometimes liquid, the price of the valve remains high, and the temperature changes with a large range. Shorten the assembly cycle, overcome poor sealing, and simplify the production process

Active Publication Date: 2017-09-22
GUANGXI KEDE VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But through the inventor's long-term practice, such as when ball valves are used in industries such as sewage treatment, sugar refining, petrochemical, chemical industry, papermaking, food, etc. when the environment is relatively harsh, especially when sugar refining, one is because their medium composition is more complicated , the shape of the medium is sometimes particles, sometimes liquid, and is highly corrosive. Second, the temperature range is high and the range is large. These put forward very high requirements for the material of the valve body and disc, and the existing valves use The valve body is made of carbon steel, alloy, copper, pure titanium, titanium alloy, and stainless steel at one time. The material cost is very high, but in fact only the parts in contact with the medium need special materials, and the waste of materials is very serious, resulting in The price of valves remains high, how to reduce the cost of valves and make the valves suitable for medium needs has become a difficult problem

Method used

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  • Eccentric ball valve with liner and preparation method thereof

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preparation example Construction

[0057] The preparation method of described valve body 13 comprises the following steps:

[0058] In the first step, the liner 18 is precision casted using an alloy material by using an investment casting method, and the alloy material is stainless steel, titanium alloy, copper alloy, or iron-manganese alloy.

[0059] The second step is to passivate the lining layer 18 after casting the lining layer 18 .

[0060] In the third step, after passivating the lining layer 18, a layer of ceramic paint is applied on the outside thereof, and the thickness of the ceramic paint is 0.1-3 mm.

[0061] The fourth step is to heat the lining layer 18 coated with the ceramic paint to 250-350°C.

[0062] The fifth step is to put the above-mentioned treated liner 18 into a sand mold made of water glass as pre-embedding, and pour the outer layer material quickly, and the outer layer material is made of carbon steel or ductile iron.

[0063] Step 6: Cool the liner 18 quickly after pouring, and le...

Embodiment 1

[0077] First prepare high-temperature resistant ceramic coatings, synthesize aluminum hydroxide or aluminum oxide with phosphoric acid, use phosphoric acid solution with a weight concentration of 85% and aluminum hydroxide powder to react and synthesize in liquid phase, and the reaction temperature is 110-130°C to obtain phosphoric acid Aluminum dihydrogen, then according to the following proportioning by weight:

[0078] 44-48 parts of kaolin, 20-50 parts of modified epoxy resin, 10-30 parts of quartz powder, 7-8 parts of acetone, 6-7 parts of aluminum dihydrogen phosphate and 3-5 parts of polyurethane powder to prepare high-temperature resistant ceramics coating.

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Abstract

The invention discloses an eccentric ball valve with a lining and a preparation method thereof. The ball valve comprises a valve body, a valve shaft and a valve core, and is characterized in that the lining is arranged inside the valve body; a flow inlet and a flow outlet are formed in the side surface of the valve body; a mounting hole is formed in each of the top surface and the bottom surface of the valve body; a large gland is mounted inside each mounting hole; the valve core is supported and fixed inside the valve body through the large glands; the valve shaft consists of an upper valve shaft and a lower valve shaft; the upper valve shaft and the lower valve shaft respectively penetrate through the large glands mounted on the top surface and the bottom surface of the valve body to be connected with the valve core; packing seats, packing and bearing sleeves are arranged between the large glands and the valve shaft; packing glands press the packing seats, the packing and the bearing sleeves supporting the rotation of the valve shaft into the large glands. The ball valve provided by the invention has the characteristics of being ingenious in arrangement, low in production cost, convenient to mount, excellent in sealing property, capable of adapting to various media, and the like.

Description

technical field [0001] The invention relates to a valve, in particular to an eccentric ball valve with a liner used in relatively harsh environments and a preparation method thereof. technical background [0002] At present, there are many types of ball valves that cut off the medium in the pipeline, and the eccentric hemispherical valve is one of them. It is suitable for the control and transportation of media such as liquid, gas or slag removal in the pipeline. Its main function is to cut off, Distribute and change the flow speed and direction of the medium. The closing part of the eccentric hemispherical valve is a hemisphere. The sphere rotates around the center line of the valve body to achieve the purpose of opening or closing. It is widely used in steel, hydropower, sugar, paper, Municipal water supply, sewage treatment and other occasions, the effect is also very good. Therefore, some people have invented some eccentric hemispherical valves, and some have been repor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/06F16K27/06F16K41/02C04B35/66
CPCC04B35/66F16K5/0636F16K5/0694F16K27/067
Inventor 刘向阳
Owner GUANGXI KEDE VALVE CO LTD
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