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High strength and long life check valve and manufacturing method thereof

A check valve, long-life technology, applied in the direction of control valve, valve device, functional valve type, etc., can solve the problems of decreased safety, decreased sealing performance, decreased performance of check valve, etc., and achieves good machinability and good elasticity. , The effect of good corrosion resistance

Inactive Publication Date: 2017-09-05
NINGBO HUACHENG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, no matter what kind of material the check valves in the prior art use, their sealing performance will decrease as the temperature rises. When used in severe fire-fighting scenarios, the performance of most conventional check valves will decrease, and the safety will also decrease. decline

Method used

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  • High strength and long life check valve and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high-strength and long-life check valve, the check valve includes a check valve body 1, a mounting seat 5 matched with the check valve body 1, a sealing end 6 arranged at the right end of the mounting seat 5, and a sealing end 6 arranged at the check valve body The oil inlet on 1 also includes a spring 2 fixed in the main body of the check valve 1, a spring seat and a bow-shaped feeding device 3 arranged at the right end of the spring seat, which is used to fix the bow-shaped feeding device 3 and is arranged on the bow-shaped feeding The right end of the device 3 obtains the support column 4 that concentrates the inclined conical forging streamline toward the inner hole through square-turn-circle hot extrusion and swaging.

[0025] A method of manufacturing a support column 1, comprising the following steps:

[0026] 1) Pre-preparation

[0027] ① Use tin-zinc bronze QSn4-3 copper billet as raw material;

[0028] ② Select forging equipment equipped with hydraulic gen...

Embodiment 2

[0043] The whole is consistent with Example 1, the difference is:

[0044] A method of manufacturing a support column 1, comprising the following steps:

[0045] 2) forging

[0046] ①The tin-zinc bronze QSn4-3 copper billet is heated through a vacuum resistance furnace to a value higher than its theoretical AC3 At a temperature of 30°C, keep warm for (27d) min / mm according to the diameter of the copper billet, and then take it out of the furnace, and fix the bottom of the copper billet on the rotary push device;

[0047] ②The forging hammer head linked with the rotary push device is pushed by the hydraulic generating device, and the copper billet is extruded into a forging billet with a nearly square cross-section at a feed rate of about 2% for each deformation and a final deformation ratio of 16 to deform the copper billet. The length of one forging deformation is one forging cycle. After the last forging in one cycle is completed, the forging hammer head is fixed on the sur...

Embodiment 3

[0051] The whole is consistent with Example 1, the difference is:

[0052] A method of manufacturing a support column 1, comprising the following steps:

[0053] 2) forging

[0054] ①The tin-zinc bronze QSn4-3 copper billet is heated through a vacuum resistance furnace to a value higher than its theoretical AC 3 At a temperature of 50°C, keep warm for (30d) min / mm according to the diameter of the copper billet, and then take it out of the furnace, and fix the bottom of the copper billet on the rotary push device;

[0055] ②The forging hammer head linked with the rotary push device is pushed by the hydraulic generating device, and the copper billet is extruded into a forging billet with a nearly square cross-section at a feed rate of about 2% for each deformation and a final deformation ratio of 20% to deform the copper billet. The length of one forging deformation of the blank is one forging cycle. After the last forging in one cycle is completed, the forging hammer head is ...

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Abstract

The invention relates to a high strength and long life check valve and a manufacturing method thereof. The check valve comprises a check valve main body, an installation seat matched with the check valve main body, a sealing end arranged at the right end of the installation seat, and an oil inlet formed in the check valve main body; the check valve further comprises a spring fixed in the check valve main body, a spring seat, an arch feeding device arranged at the right end of the spring seat and a support column which is used for fixing the arch feeding device and arranged in the right end of the arch feeding device and can obtain a tapered forged flow line inclining to an inner hole in a centralized mode through square-to-circular hot extrusion and rotary forging ,. The check valve can achieve self-complementing of expansion under the high temperature and is high in safety.

Description

technical field [0001] The invention relates to the field of water control equipment, in particular to a high-strength and long-life check valve and a manufacturing method thereof. Background technique [0002] Check valves include butterfly valves, gate valves, check valves, pressure reducing valves, wet alarm valves, signal butterfly valves, automatic exhaust valves, explosion-proof valves, stainless copper metal hoses, safety valves, and pressure relief valves. The general check valve adopts the rising stem flange gate valve. [0003] Check valve is an important accessory for industrial and construction pipeline control. The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves are also divided into cast iron valves, cast copper valves, stainless copper valves, chromium molybdenum copper valves, chromiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/06B21K1/20
CPCF16K15/063B21K1/20
Inventor 王朝阳林方杰王晓晓金昌锡葛涛涛杨建标
Owner NINGBO HUACHENG VALVE
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