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Triple-spring safety valve

A safety valve, spring-type technology, applied in the field of safety valves, can solve the problems of performance and quality that cannot meet contemporary needs, and achieve the effect of reliable performance

Inactive Publication Date: 2012-06-27
赵全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

China's relevant industry authorities once organized safety valve manufacturers to sort out the design drawings of safety valves used in low-pressure and medium-temperature boilers for unified use by manufacturers. So far, their performance and quality can no longer meet contemporary needs.

Method used

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and concrete example for further explanation:

[0040] The valve body 1, valve cover 2 and bonnet 3 of the Sanhua spring safety valve of the present invention are connected sequentially from bottom to top, and the valve seat 4, valve disc 5 and outer peripheral sleeve T-shaped guide plate 6 are connected sequentially from bottom to top. Recoil disc 7, valve stem 8, adjusting screw rod 9 and screw plug 10; a lock nut 11 is also set between the top of the valve cover 2 and the adjusting screw rod 9, and the valve stem 8 is also set with a spring 12 under the adjusting screw rod 9 And the spring seat 13, the outer periphery of the upper part of the valve seat 4 is equipped with an adjusting ring 14 through a screw, and the valve body 1 is equipped with a positioning screw 15 for fixing the adjusting ring 14; A corrugated pipe 18 made of one or more layers of corrosion-resistant materials is installed between the supporting sle...

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Abstract

The invention relates to a triple-spring safety valve, which solves the problem of poor reliability of an existing spring safety valve. The maximum rigidity of a spring of the triple-spring safety valve at the specified opening height is lambda=0.9 / hX(pi / 4Xd02pdr rhoh-pi / 4D2mps), wherein the h refers to the opening height mm of a valve clack, the do refers to the diameter mm of a flow channel, the Dm refers to the medium diameter mm of a sealing surface of the valve clack, the pdr refers to rated discharge pressure Mpa, the rho refers to the lift coefficient of the valve clack when the triple-spring safety valve is lifted to the h, and rho=Qs / pi / 4Xd02p. The spring parameter is lambda=Gd4 / 8D3n, wherein the G refers to shearing modulus, the d refers to the diameter of the spring, the D refers to the medium diameter of the spring, and the n refers to effective coil number. A valve body is made of WCB, CF8 and CF3M, a slope is manufactured on the inner side of a surfaced alloy ring of a valve seat, and an included angle between the slope and a center line is 30 degrees. The triple-spring safety valve has the advantages that standard internationalization, type serialization and specification universalization can be realized while opening, lifting, reseating and closing with fine sealing are completed in the same action, and the performance is extremely reliable.

Description

technical field [0001] The invention relates to a safety valve, in particular to a Sanhua spring type safety valve. Background technique [0002] Spring safety valve is a protective device for pressurized boilers, containers and pipelines. It does not rely on electrical external force, but uses spring force to balance the pressure of the inlet medium. When the equipment pressure exceeds the set value, the valve opens to discharge, and the overpressure medium drops to the specified value, and the valve closes. It is a protection device to ensure the normal operation of the pressurized system. [0003] Chinese safety valves mostly adopt the technology of the former Soviet Union in the 1950s. China's relevant industry authorities once organized safety valve manufacturers to sort out the design drawings of safety valves used in low-pressure and medium-temperature boilers for unified use by manufacturers. So far, their performance and quality can no longer meet contemporary need...

Claims

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Application Information

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IPC IPC(8): F16K17/06F16K27/02
Inventor 赵全
Owner 赵全
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