CN1132062A - Over-pressure self-discharging pressure cooker - Google Patents

Abstract

A pressure cooker designed based on thin-wall self decompression features that an elastic combination between its thin cover with curled edge and thin-wall cooker body with toothed top edge and navel-type convex-down bottom is used and a pressure releasing slots are made on top edge of sealing ring and cover for self decompression. Its advantage include high safety and less consumption of raw material.

Description

Over-pressure self-discharging pressure cooker

The invention belongs to household pressure cooking utensil.

In the national standard of relevant daily pressure cooker, clearly the safety standard of Zhi Dinging is with the intensity of guaranteeing pressure cooker and takes necessary safety measure to solve problem safe in utilization.Because the qualified daily pressure cooker product of under national standard, being produced, the obstruction probability of its anti-clogging safety measure is not equal to zero, therefore, the daily pressure cooker blast happens occasionally, and in May, 1993, relevant department was 4/10000ths. two by the quick-fried pot of the pressure cooker rate that news media announces.As seen the safety problem of pressure cooker does not thoroughly solve.Is a kind of challenge to traditional secured fashion by the thin-walled elasticity that proposes for Chinese patent ZL91111160 number from the pressure release secured fashion, it is a kind of mode of very promising thorough solution pressure cooker safety, just especially in the design of pot body, pot tooth and lid tooth, also being short of on the concrete structure, so leeway is still arranged on the product material-saving.Thin-wall pressure pot cover by the roll coil of strip limit that proposes for Chinese patent ZL92236616 number only is the material-saving problem that has successfully solved pressure cooker cover.

Except that above, the safety problem of not seeing as yet daily pressure cooker surmounts existing gaining in strength, and increases the standard practice of safety device, and adopts patent and the application report of elasticity from the new method of pressure release.

The objective of the invention is further to improve the mode of the thin-walled elasticity of Chinese patent ZL9111160 institute proposition pressure cooker, in conjunction with the thin-walled elastic pressure pot cover that forms roll coil of strip limit after the ZL92236616 patent from pressure release; Proposition is set up pot tooth coil and the bottom of a pan is had under the navel formula at the bottom of the convex, solves the material-saving of pot body and the contradiction between the intensity, realizes a pot body thin-walled property; Make relief hole into the pressure release groove to improve machinability and from the uniformity of pressure release value; Set up and close cap sealing and guarantee when pressure cooker closes lid not to specified angle, to can not form sealing in the pot; Form that pot cover and pot body be that having of thin-walled can not block up accurately from the new ideas daily pressure cooker patented technology of pressure release value, making this daily pressure cooker product that can thoroughly eliminate the unsafe factor in the use maturation that more becomes is purpose of the present invention.

Principle and method that the present invention uses are: adopt the thin-walled elastic cover of being with the crimped lid tooth and establishing the pressure release groove at the sealing ring suitable position, and band places the pot edge of sealing ring and has the compound pot body that the thin-walled pot body at the bottom of the convex under the navel formula and ad hoc rigidity pot tooth coil constitute, and elastic cover and compound pot body seal through the elasticity interconnection system of sealing ring realization pressure cooker.When pressure cooker under the present invention is worked, in pot, initially boost to the overall process of rated operating pressure, the displacement that the effective working diameter of pot cover makes progress with interior part is stable functional relation with pot inner pressure.Obviously, the design of sealing ring should be satisfied the requirement of this axial movable sealing.The pressure limiting of pot inner pressure in the present invention still can be taked Weight type exhaust pressure limiting, or takes the Pressure Regulation Exhaust pressure limiting of adjustable spring formula.When stopping up owing to the exhaust pressure limiting, pot inner pressure rises to when the value of letting out, and the pressure release groove on the pot cover is with the displacement of pot cover and sealing ring, and the sealing ring line of going beyond sealing ring forms pressure release.At pot cover upper sealing ring line suitable position, by from uniform several pressure release grooves of pressure release requirement, just formed this from pressure release can not blocking up property, thereby thoroughly solved the pressure security problem.In the present invention,, establish and close put in place the cap seal of running jointly of sealing, the preceding pressure release of uncapping of lid and let out device, guarantee safe in utilization for consistent with existing daily pressure cooker production standard.Operation principle of the present invention and architectural feature illustrate in conjunction with Fig. 1,2,3.

The drawing explanation: Fig. 1,2,3 is a structural representation, and 1 is pot cover, the 2nd in Fig. 1, pot body, the 3rd, and pot tooth coil, the 4th, sealing ring, the 5th, pressure limiting valve, the 6th is run envelope jointly and is let out valve, the 7th, upper handle, the 8th, lower handle.Fig. 2 is near the part section enlarged diagram the pot tooth coil 3 among Fig. 1, and Fig. 2 has provided the functional part naming number of pot cover 1, pot body 2 and pot tooth coil 3.9 is pot cover outer shrouds, the 10th in Fig. 2, crimped lid tooth, the 11st, pressure release groove, the 12nd, pot tooth, the 13rd, pot tooth locating ring, the 14th, pot edge.Fig. 3 has provided and has run the structure principle chart that envelope is let out valve 6 among Fig. 1 jointly, and 15 is valve ports, the 16th in Fig. 3, valve head, the 17th, connecting rod, the 18th, spring, the 19th, clack valve.

Over-pressure self-discharging pressure cooker is when normal operation, and its operation principle is similar to daily pressure cooker with process, Realize from pressure release for making pot cover and sealing ring produce relative displacement by pot inner pressure when the non-normal working, Thoroughly solve safety problem, pot cover is designed to make with Thin Stainless Steel sheet material, make pot cover 1 have pot Lid outer shroud 9 and crimped lid tooth 10, wherein pot cover outer shroud 9 refers to that effective working diameter of pot cover 1 (namely works The pressure diameter) comprises the elastic construction that crimped lid tooth 10 forms to maximum gauge. Obviously, illustrate from Fig. 2 Pot cover outer shroud 9 its section shape similar C-shapeds, be comparatively desirable resilient shapes, can be described as C type pot cover. And pot cover 1 is that the rigidity of routing up the crimped lid tooth 10 that comes with crimping is elastic displacement and the rigid connecting of pot cover 1 The ingenious combination that connects, can guarantee in effective working diameter of pot cover 1 with pot inner pressure produce to upper Move, be stable functional relation. The present invention such as Fig. 1 are shown in Figure 2, the sealing of pot cover 1 and pot body 2 be by The sealing ring 4 that place pot edge 14 on the pot body 2 is realized. Be fastened on pot tooth coil 3 outers of pot body 2 upper ends Six crimped lid teeth 10 on uniform six pot teeth 12 and 1 time edge of pot cover form mechanics and connect and bear in the pot Pressure, visible over-pressure self-discharging pressure cooker is continued to use closing of daily pressure cooker fully in the design of closing and opening cover during booting The custom of uncapping. Fig. 2 illustrates on the working diameter sealing ring of pot cover 1, uniform some pressure release grooves 11, Under the normal pressure, the sealing that pressure release groove 11 does not affect pressure cooker can be blocked in the upper edge of sealing ring 4. When non-Normal operation is during superpressure, in the pot unnecessary pressure cause pot cover 1 excessive to top offset, make the pressure release groove The upper along destroying sealing of sealing ring 4 gone beyond on 11 upper edge, makes this unnecessary pressure from letting out doctor's groove 11 and sealing On Fig. 4 along between the slit release. Be not difficult to find out when unnecessary pressure releasing during near operating pressure from Fig. 2, The return of pot cover 1 can make sealing ring 4 again block pressure release groove 11 to recover sealing and make and still remain on work in the pot Pressure. The pot body 2 the pot edge 14 that is provided with suitable for reading be to place specially sealing ring 4, when in the pot pressure being arranged from figure 2 can find out that two faces are subjected to pot inner pressure to be crushed on 14 places, pot edge under the side of sealing ring 4 outsides, guarantee to work as pot cover On 1 sealing ring 4 during to top offset along and pot cover 1 produce normal displacement. Obviously, this from pressure release mode tool Having can not blocking up property and comparatively accurately from the pressure release value. Pot body 2 is except pot edge of establishing special placement sealing ring 4 suitable for reading Outside 14, it is mechanics shape preferably that convex is adopted under the navel formula in the bottom of a pan, can effectively reduce material thickness. This Invention is for saving the material consumption of pot body 2, with the pot tooth of stressed maximum in the pot body of existing daily pressure cooker The spy tells a part, the pot tooth coil 3 that adopts among the present invention that Here it is. Pot tooth coil 3 is suitable for reading with pot body 2 Bound fraction has consistent fitted position and is set with fastening. Obviously, the present invention is with pressure of the prior art Power pot body is divided into pot tooth coil 3 and 2 two parts of pot body form the compound pot body, at selection material, saving material Upper more rational. Put in place and could seal for satisfying closing lid among the present invention, run the operation principle that envelope is let out valve 6 jointly Be: valve port 15 be pot cover 1 with pressure release groove 11 same level faces on and the center line of upper handle 7 corresponding The position aim at the aperture that valve head 16 turnover are offered, and valve head 16 is connecting clack valve 19 by connecting rod 17. From figure 3 diagrams can find out, clack valve 19 can drive valve heads 16 through connecting rod 17 to top offset, make it enter valve port The sealing of sealing ring 4 and pot cover 1 is destroyed on the upper edge of 15 compressing sealing rings 4. Obviously, when clack valve 19 recoveries After the displacement (downward among Fig. 3), the elastic force of spring 18 can make clack valve 19, and connecting rod 17 and valve head 16 are in again Initial position, thereby the sealing that recovers sealing ring 4 and pot cover 1. As seen, with clack valve 19, spring 18, company Bar 17 and valve head 16 reasonably are arranged on the inside of upper handle 7, by the limit to clack valve 19 displaced positions Fixed, can realize the safety requirements that only has the pressure cooker cover closing lid to put in place and could seal in the related standards.

The present invention has following main points (is example with 20cm bore) in force: the pressure relief device of forming with sealing ring 4 and pressure release groove 11, and its pressure release sensitivity roughly can be controlled in ± magnitude of 15KPa in force, and its pressure release displacement is equivalent to about 0.25mm.Therefore, when the elastic displacement of pot cover 1 is 100KPa at pot inner pressure, can be selected in about 1.5～2.0mm, when pot cover 1 was selected the high-quality stainless steel for use, its thickness should be selected in about δ 0.6～0.7mm, and the volume loop diameter of crimped lid tooth 10 should be about 3.5mm.Pot cover outer shroud 9 formed C shape sizes, its height should be about 15mm, and the maximum gauge of the suitable pot cover 1 of width and the effective pairing radius of working diameter poor.Should be about 25mm.Such pot cover and pressure cooker cover of the prior art be from appearance, should be considered to wide along pot cover.Utilize the elasticity on this wide edge (being pot cover outer shroud 9) to realize from pressure release in the present invention just.Also to determine from the accurate of pressure release value in force by the upper edge of sealing ring 4 and the mutual size of the pressure release groove 11 on the pot cover 1, some more being advisable of quantity of common pressure release groove, as be selected in 6～12, its width and the degree of depth should be chosen in the millimeter magnitude.Guarantee from the relative dimensions of pressure release value except that the mfg. moulding die that relies on pot cover 1 and sealing ring 4 in the present invention, also pass through the mfg. moulding die of the pot edge 14 on the pot body 2, guarantee in pot that sealing ring 4 when pressure is arranged is pressed on by pot inner pressure on the pot edge 14 and not with the elasticity of pot cover 1 to top offset, guarantee the accurate reliability of pressure release value with this.Obviously, as long as make pot edge 14 that enough vertical heights are arranged in design, the effective depth of pot edge 14 is selected in about 5mm and just can meets the demands usually.Pot body 2 is chosen the thick aluminium sheet stretching in the δ 2mm left and right sides usually and is made, for the garden tube part of saving material pot body still adopts ironing, it is stressed that the bottom of pot body 2 adopts spirogyrate to be beneficial to the bottom of a pan, establish a convex-shaped navel for ease of the bottom centre that keeps flat pot body 2, as its diameter is selected in about 100mm, both can satisfy keeping flat requirement, and can satisfy force request again.Should be noted that the aluminum pressure cooker body with manufacturing of the present invention rather improves owing to its force-bearing situation,, product is improved the grade, increase kind so might increase the non-sticking lining product.Pot tooth coil 3 can adopt the manufacturing of high-quality stainless steel material, and its bound fraction with pot body 2 should be joined work and fastening, also should join work with the mating part of crimped lid tooth 10.Should be noted that ad hoc pot tooth locating ring 13 on the pot tooth coil 3,, except that it being processed into the annular projection, also can do outside the slabbing projection in force, as long as can realize centralized positioning to utilize the centralized positioning of pot cover 1 and pot body 2.The material thickness of pot tooth coil 3 is selected in about δ 1mm, and intensity can meet the demands, and its vertical height should be about 20mm.Run envelope jointly and let out valve 6, by valve head 16 shown in Figure 3, connecting rod 17, clack valve 19 can be designed to a plastic part, are installed in the upper handle 7 with spring 18.Obviously, upper handle 7 use heatproof plastics or bakelite make internal structure can mounting spring 18, clack valve 19, connecting rod 17, valve head 16 and be beneficial to slip, reach and run cap seal jointly and let out requirement.

The present invention adopts elasticity, thin-walled, from new departure of pressure release, solve present pressure cooker safety problem. It can not blocking up property be thoroughly to solve the good method that pressure cooker uses safety from pressure release, has the over-pressure self-discharging spirit The sensitivity height, after pressure release, recover the important feature such as good airproof performance. Particularly control product from the pressure release parameter Process means and quality assurance means all depend on the die quality of pot cover, pot body and sealing ring. Therefore, The product of over-pressure self-discharging pressure cooker has good quality assurance means. The present invention is with ZL91111160 With the ingenious combination of ZL9223661.6 patent, make the safety problem of pressure cooker, not only have technically Break through, and more perfect on product processes and quality assurance means. The present invention propose by The compound pot body that the pot tooth coil of pot body forms is saved lot of materials than prior art, makes new departure pressure cooker Product more rational. The present invention thoroughly solves from elasticity, thin-walled, from the technical thought of pressure release The safety problem of pressure cooker, and the acquisition of technology progress is very can on product design and quality assurance means Expensive. Product is than in the prior art, by improving intensity, increasing safe handling device solution under the present invention The scheme of determining and using safely has the characteristics such as safety is thorough, saving material, and this is technical great prominent Breaking makes product that good market prospects be arranged.

Claims (4)

1. elastic thin-wall over-pressure self-discharging pressure cooker, it is characterized in that: by the C type structural formula pot cover [1] of being with crimped lid tooth [10] and pressure release groove [11] to form, with the compound pot body of forming by pot body [2] and the pot tooth coil [3] with spirogyrate navel formula the bottom of a pan of band pot edge [14], be the over-pressure self-discharging pressure cooker that seals and form by pressure limiting valve [5] pressure limiting by sealing ring [4] formation.

2. over-pressure self-discharging pressure cooker according to claim 1 is characterized in that: C type structural formula pot cover [1] is to be made by Thin Stainless Steel sheet material to have crimped lid tooth [10], the thin-walled pot cover of pot cover outer shroud [9], pressure release groove [11].

3. over-pressure self-discharging pressure cooker according to claim 1 is characterized in that: the compound pot body be by on pot edge [14] is arranged, pot body [2] and fastening the forming of being made up of pot tooth [12], pot tooth locating ring [13] of pot tooth coil [3] at the bottom of the navel formula spirogyrate are arranged down.

4. over-pressure self-discharging pressure cooker according to claim 1, it is characterized in that: run envelope jointly and let out valve [6] by valve head [16]. connecting rod [17]. spring [18]. clack valve [19] is formed, and clack valve [19] displacement drives the upper edge that valve head [16] enters valve port [15] compressing sealing ring [4] during by closing and opening cover during booting, destroys the sealing of sealing ring [4] and pot cover [1].