Unlock instant, AI-driven research and patent intelligence for your innovation.

Pressure cooker exhaust valve and preparation method thereof

A technology of exhaust valve and pressure cooker, applied in pressure cooker and other directions, can solve the problems of inaccurate positioning, product failure, high scrap rate, etc., and achieve the effect of simple processing procedure, low scrap rate and low cost

Active Publication Date: 2016-06-15
广州市光铭金属制品有限责任公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Numerous processes can easily cause its weight to be unstable. Among them, the blanking process is the biggest factor affecting its weight. Due to the irregularity of the material and the poor precision and accuracy of the blanking, the fluctuation of its own weight is large, and it is easy to exceed the safety of its own weight. Requirements range, resulting in safety hazards or high scrap rates
According to the existing structure and processing method, the one-time pass rate is only about 70%, that is to say, the reject rate of one-time processing is as high as about 30%.
[0006] Moreover, there are lubricating oil residues in spinning or forging processing, and the lubricating oil will seep out at high temperature or high pressure, thus causing food safety hazards
[0007] At the same time, when the exhaust valve body and the exhaust valve thimble are processed as a whole through plastic, due to inaccurate positioning, the exhaust valve thimble of the finished product and the exhaust nozzle on the pressure cooker lid cannot form a good sealing effect. cause product failure
[0008] Due to its structural reasons, the existing pressure cooker exhaust valve makes it have many processing procedures, and in addition to the high rejection rate, its production cost has always been high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pressure cooker exhaust valve and preparation method thereof
  • Pressure cooker exhaust valve and preparation method thereof
  • Pressure cooker exhaust valve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 2 and image 3 As shown, this embodiment discloses a pressure cooker exhaust valve, including an exhaust valve body 1, an exhaust valve thimble 2, and other structural parts identical to the existing pressure cooker exhaust valve (due to the fact that other components are the same as the existing same, not shown in the figure), such as valve body circlips, etc. Wherein, a plurality of connecting ribs 5 are arranged between the inner peripheral wall of the exhaust valve body 1 and the outer peripheral wall of the exhaust valve thimble 2, and the gap between two adjacent connecting ribs 5 forms an exhaust hole. ; Wherein, the exhaust valve body 1, the exhaust valve thimble 2, and the connecting rib 5 are integrally formed by powder metallurgy process; wherein, the height H of the thimble front cone 21 at the front end of the exhaust valve thimble 2 is 1-3 mm ; Wherein, an anti-taper hole 22 is provided at the top of the exhaust valve thimble 2 .

[0043...

Embodiment 2

[0047] This embodiment discloses a method for preparing a pressure cooker exhaust valve, comprising the following steps:

[0048] (1) Mix and prepare the powder metallurgy raw materials according to a certain ratio, the powder metallurgy raw materials include 0.5-1.2% by weight of additives, and the balance of iron powder or stainless steel powder; wherein, the iron powder is water mist iron powder, Or reduced iron powder, the reduced iron powder has a bulk density ≥ 2.40 / g.cm -3 、Flow rate≥2.40 / s.(50) -1 、Compressibility≥2.40 / g.cm -3; Among them, preferred water mist iron powder, because of its better formability; the auxiliary agent can be selected micro-wax powder or zinc stearate; wherein, preferably micro-wax powder, because of its better formability, using micro-wax powder The scrap rate of zinc stearate is about 1%, and the scrap rate of zinc stearate is about 10%; wherein, the preferred proportion of additives in the powder metallurgy raw materials is 0.8-1%;

[004...

Embodiment 3

[0053] In order to increase the strength and wear resistance of the present invention, the difference between this embodiment and embodiment 2 lies in the composition and proportioning of powder metallurgy raw materials, which includes: 0.5-1.2% by weight of additives, 0.2-2.5% by weight of copper powder , and the rest of the iron powder.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of pressure cookers, and particularly discloses an exhaust valve of a pressure cooker and a preparation method of the exhaust valve. The exhaust valve of the pressure cooker comprises an exhaust valve body, and an exhaust valve thimble arranged in an internal chamber of the exhaust valve body, wherein a plurality of connecting ribs are arranged between the internal circumferential wall of the exhaust valve body and the external circumferential wall of the exhaust valve thimble and exhaust holes are formed at clearances between every two adjacent connecting ribs; the exhaust valve body, the exhaust valve thimble and the connecting ribs are integrally formed through a powder metallurgy technology; and the front cone of the thimble at the front end of the exhaust valve thimble is 1 to 3 millimeters high. The preparation method comprises the steps of preparing powder, forming, sintering, and rust prevention. Compared with the prior art, the exhaust valve has a lower rejection rate, and is more environment-friendly, simpler in processing process and lower in cost.

Description

technical field [0001] The invention belongs to the technical field of pressure cookers, and in particular relates to a pressure cooker exhaust valve and a preparation method thereof. Background technique [0002] The pressure cooker exhaust valve must be safe and environmentally friendly. The key factor for safety is the weight of the exhaust valve itself. Environmental protection means no harmful exudates. [0003] Such as figure 1 As shown, the current pressure cooker exhaust valve includes an exhaust valve body 1 and an exhaust valve thimble 2; wherein, the exhaust valve body 1 is formed by blanking, weighing, spinning or forging processing, and subsequent cutting; wherein , the exhaust valve thimble 2 is also formed by blanking and subsequent cutting; after the exhaust valve body 1 and the exhaust valve thimble 2 are processed separately, they are connected together through the plastic 3; in the exhaust valve body 1 An annular cavity is formed between the inner periph...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A47J27/09
Inventor 林暖辉
Owner 广州市光铭金属制品有限责任公司