High-temperature abrasive resistant ball valve with fixed ball and floating valve seat

A floating valve seat, high-temperature wear-resistant technology, applied in the parts, valve details, valve devices, etc. in contact between the valve element and the valve seat. It can achieve the effect of good sealing, improved concentricity and easy assembly due to problems such as poor degree of freedom of the valve seat and limited operating temperature.

Active Publication Date: 2009-10-21
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the left and right valve bodies (1, 5) are in direct contact with the valve seat (2), the movement depends on the gap tolerance and the degree of freedom of the valve seat
[0006] 2. Due to structural limitations, the seat of ordinary fixed ball v...

Method used

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  • High-temperature abrasive resistant ball valve with fixed ball and floating valve seat
  • High-temperature abrasive resistant ball valve with fixed ball and floating valve seat
  • High-temperature abrasive resistant ball valve with fixed ball and floating valve seat

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Embodiment Construction

[0037] As shown in Figure 3 and Figure 4: the valve includes a left valve body (1), a right valve body (7), two floating valve seats (2), an auxiliary sealing spring (13), a ball (5), a shaft (9), shaft two (6), cooling body (8) and packing gland (11); the valve body adopts a two-body structure in which the left valve body (1) and the right valve body (7) are combined into one; and the upper shaft (6) and the lower shaft (9) are welded with the sphere (5) to form an integral structure; it is characterized in that a stuffing box is formed between the left valve body (1), the right valve body (7) and the floating valve seat (2) , and a built-in packing (4), and a high-temperature-resistant spring (3) is arranged between the packing (4), which constitutes a packing seal (12). Using the built-in high-temperature-resistant packing (4) and high-temperature-resistant spring (3) and the above-mentioned auxiliary The resilience of the sealing spring (13) makes the two floating valve se...

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Abstract

The invention discloses a high-temperature abrasive resistant ball valve with a fixed ball and a floating valve seat. The ball valve has a left valve body (1) and a right valve body (7) which form a stuffing box with the floating valve seat (2) respectively. The stuffing box is filled with stuffing (4) and a high-temperature resistant spring (3) is arranged between stuffing (4) so as to form stuffing seal (12). The two floating valve seat (2) is caused to reach floating and sealing requirements in the left valve body (1) or the right valve body (7) in virtue of recurrent force of the embedded high-temperature resistant stuffing (4), the high-temperature resistant spring (3) and the auxiliary seal spring (13). In respect of material selection, the ball valve is made of a high-temperature material. The ball valve is made from a new material and by a new process and has a spray welding sealing surface made of a nickel-based alloy and a chrome-based alloy, thus improving hardness of the sealing surface (up to HRC68-72) and reaching remarkable effect of abrasive resistance, corrosion resistance and erosion resistance.

Description

technical field [0001] The invention relates to a valve device, in particular to a high-temperature, high-pressure wear-resistant ball valve used for gas-solid two-phase or gas-solid-liquid three-phase media. Background technique [0002] High temperature wear-resistant fixed ball floating seat ball valve is a kind of ball valve widely used in the prior art. Chinese patents CN2867000Y, CN1225432A, Japanese patent JP2002-257246A and U.S. patent US4911408A etc. all disclose some structures of this ball valve. At the same time, some domestic units have developed some high-temperature resistant fixed ball valve products, but most of their products use three-body combination valve bodies, as shown in Figure 1 and Figure 2: [0003] This three-body combined valve body is that the sphere (3) is fixed on the middle valve body (6) with the upper and lower shafts (4, 7), and the valve seat (2) is contained in the left and right valve bodies (1, 5). The three-body combination is conn...

Claims

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Application Information

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IPC IPC(8): F16K5/20F16K27/06F16K25/00
Inventor 张德贤冀江
Owner SINOPEC ENG
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