Top-entry floating ball valve

A floating ball valve and top loading technology, which is applied to valve devices, engine components, cocks including cutting devices, etc., can solve the problems of many sealing surfaces, difficult assembly, easy cracking, etc., and achieve less sealing positions, convenient processing, and favorable assembly Effect

Inactive Publication Date: 2012-03-07
NEWAY VALVE SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The floating ball valve has the following disadvantages: (1) The failure of any one of the above four seals will cause the sealing requirements of the floating ball valve to be unable to be guaranteed, resulting in leakage of the valve; (2) There are too many sealing surfaces that need to be ground and polished, Time-consuming and labor-intensive; (3) The sealing structure of the floating ball valve is complex, there are many parts, it is difficult to assemble, which affects production efficiency; (4) The design thickness of the soft sealing material valve seat is too thin, and it is extremely difficult to switch under pressure or when the temperature changes greatly. easy to crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one: see Figure 4 and Figure 5 As shown, a top-entry floating ball valve includes a valve body 1, a valve seat 2 at the outlet end, a ball 3, a valve cover, and a valve stem assembly. The valve stem assembly is inserted into the valve cover, and its lower end is inserted into the ball 3, the valve cover is fixedly connected to the top of the valve body 1 to form a top entry floating ball valve structure. Through the above structure, when the floating ball valve fails on the pipeline and needs to be repaired, it is not necessary to dismantle the valve from the pipeline, only the flange bolts and nuts fixedly connecting the bonnet and the valve body need to be removed, and the bonnet and stem assembly together Remove from the valve body, then remove the ball and seat, the ball and seat can be repaired online.

[0038] The outlet valve seat 2 is composed of an inner valve seat 20 and an outer valve seat 21. The inner valve seat 20 is provided with a sealing ...

Embodiment 2

[0044] Embodiment two: see Figure 7 As shown, the structure of the second embodiment is basically the same as that of the first embodiment, the difference is that the composite surface of the inner valve seat 20 and the outer valve seat 21 is a step surface, and through the above structure, the composite surface of the inner and outer valve seats is realized. sealing requirements.

[0045] No annular groove is formed on the outer side wall of the outer valve seat 21 that is in contact with the valve body 1 .

Embodiment 3

[0046] Embodiment three: see Figure 8 As mentioned above, the structure of the third embodiment is basically the same as that of the first embodiment, except that the inner diameter of the inlet end of the floating ball valve is equal to the inner diameter of the outlet end, so the inner hole of the inner valve seat 20 is a cylindrical hole.

[0047] The inner valve seat and outer valve seat of the present invention are not limited to the three structures described in the above embodiments, but any inner valve seat and outer valve seat structure that those skilled in the art can think of, and the two are combined into an outlet port The invention of the valve seat all falls within the protection scope of the present invention.

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Abstract

The invention discloses a top-entry floating ball valve, comprising a valve body, an outlet-end valve seat and a ball body, wherein the outlet-end valve seat is formed by combining an inner valve seat and an outer valve seat, a sealing face laminated with a spherical face of the ball body is arranged on the inner valve seat, one end of the outlet-end valve seat is laminated with the spherical face through the sealing face to form a contact-type dynamic sealing structure, and the end face at the other end of the outlet-end valve seat is laminated with the valve body to form a direct-contact sealing structure. According to the invention, by combining the sealing between the sealing face and the spherical face and the sealing between the end face of the outlet-end valve seat and the end face of the valve body, the integral sealing requirement of the floating ball valve is met, sealing positions are fewer, the entire valve seats made of soft sealing materials are larger, and the tope-entry floating ball valve has the characteristics of easiness for grinding and polishing, simple structure, sealing reliability and convenience for machining and is beneficial to assembly.

Description

technical field [0001] The invention relates to a floating ball valve, in particular to a top-mounted floating ball valve. Background technique [0002] The ball valve is one of the most widely used valves. Its working principle is the same as that of the plug valve. The valve is opened and closed by rotating the valve core, but the ball valve is lighter than the plug valve, relatively small in size, reliable in sealing, and simple in structure. Easy maintenance, the sealing surface and the sphere are always in a closed state, which is not easy to be eroded by the medium. At present, ball valves have been widely used in petroleum, chemical industry, metallurgy, textile, food, atomic energy, aviation and other departments. [0003] At present, top-entry ball valves are mostly used in engineering, and the top-entry ball valves are easy and quick to disassemble on the pipeline, and the maintenance is convenient and fast. When the valve fails in the pipeline and needs to be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/08F16K5/20
Inventor 朱彬
Owner NEWAY VALVE SUZHOU
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