CN2207777Y - Safety device of pressure cooker - Google Patents

Abstract

The utility model belongs to an auxiliary safety device of a pressure cooker. A self- locking mechanism is additionally arranged between an upper handle and a lower handle of an ordinary pressure cooker, and the self-locking mechanism is composed of a safety valve arranged on a cover of the pressure cooker, and a push pedal, a safety lever, a spring and a push lever which are arranged on the handles, wherein, the safety valve is composed of a rubber sealing seat and a valve lever which is arranged in the rubber sealing seat and can moved up and down. The auxiliary safety device of pressure cooker has the functions that pressure in the pressure cooker can not rise if the cover of the pressure cooker is not covered tightly, and the cover of the pressure cooker can not be opened if the pressure cooker has the pressure. The auxiliary safety device of pressure cooker has compact structure, strong safety performance, reliable safety performance and easy usage, and can be assembled to pressure cookers with various models and specifications.

Description

Safety device of pressure cooker

The utility model belongs to the pressure cooker auxiliary security and uses control device.

In order to improve the security performance that pressure cooker uses, Patent Office of the People's Republic of China announced that the patent No. is 902178776 " pressure cooker device safe in utilization " on March 20th, 1991, it is on the structure of usual pressure pot, increase a self-locking mechanism, make pressure cooker be in exhaust condition when pot cover does not close up fully, vapour pressure does not rise in the pot; Steam does not discharge and finishes in pot, and before pressure was not eliminated, pressure cooker was in self-locking state, and pot cover can not be opened, when it has avoided pressure cooker to use effectively, because of operate miss causes an explosion accident.But there are two shortcomings: at first be to manipulate inconvenience, next is that the interior fuse sheet of safety valve will " wear out " in use for some time, is difficult to melt under the temperature of stipulating, pressure, as untimely replacing, just can not guarantee the timely discharging of overvoltage steam, not have the effect of flame-arrester vent plug.

The purpose of the utility model be to provide a kind of can guarantee pressure cooker open close safety, pressure limiting is reliable, have again to use easy to operate, simple in structure pressure cooker to use safeties.

Pressure cooker uses safeties to comprise to be packed in the upper handle on the pot cover and is packed in the lower handle on pot body and is contained in self-locking mechanism between the lower handle.This self-locking mechanism is made up of the push pedal, safety pole, spring and the push rod that are contained in the safety valve on the pot cover and be contained on the upper handle.A valve rod that can move up and down is arranged on the safety valve, but the push pedal of parallel slip has the lockhole that matches with valve rod top appearance and size on handle, the safety pole upper end is connected with push pedal, the lower end places the interior and slip of the stopper slot of lower handle, the push rod right-hand member that is " T " font is with spring and stretches in the hole, garden of the safety pole corresponding with it, the push rod left end is relative with O-ring seal, the bottom embeds in the stopper slot of lower handle, in the process of pressure cooker open and close, push rod and O-ring seal from roof pressure to separating.

Easing valve is packed on the pot cover by the rubber seal seat of hollow, rubber seal seat intermediate inner wall is provided with the thin mouthful neck of sealing, the sliding valve rod that is contained in the rubber seal seat is respectively equipped with the upper, middle and lower positive stop lug boss, and middle boss external diameter is greater than thin mouthful of neck internal diameter 1-3mm of seal receptacle, bottom boss external diameter has on the stem lower portion sidewall and lets out the vapour groove greater than more than the middle boss external diameter 2mm.

When pot cover did not close up, push rod was under the effect of spring, and roof pressure makes the O-ring seal sealing not in place, and is in the steam discharge state, thereby pot inner pressure is not risen on O-ring seal.In normal operation, push rod leaves O-ring seal, and the valve rod on the easing valve is by pot inner vapor jack-up, and penetrates in the self-locking hole in the push pedal, and when steam in the pot does not discharge when finishing, valve rod does not fall, and push pedal can not drive safety pole and reset, and pot cover can't be opened.

When pressure limiting valve is malfunctioning, pot inner pressure raises, as long as reach certain limit (200 ± 40KPa) time, pressure ejects the thin mouthful neck of sealing with the positive stop lug boss in the middle of the valve rod, valve rod is risen, at this moment, steam is let out the vapour groove drainage steam that communicates with atmosphere by stem lower portion in the pot, thereby reach the effect of common flame-arrester vent plug, and easy to use, security performance is reliable.

Below in conjunction with embodiment shown in the drawings the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the A-A cutaway view of Fig. 1, and the schematic diagram when Fig. 3 is the easing valve operate as normal, Fig. 4 are the schematic diagram of easing valve when the pressure cooker overvoltage, among the figure: 1. pot cover, 2. rubber seal seat, 3. valve rod, 3b lets out the vapour groove, 4. push pedal, 5. O-ring seal, 6. chute, 7. connecting rod, 8. safety pole, 9. upper handle, 10. pot body, 11. lower handles, 12. push rod, 13. springs, 14. stopper slots.

As shown in Figure 1, the utility model is packed in the upper handle 9 on the pot cover 1 and is packed between the lower handle 11 on pot body 10 and designed a self-locking mechanism.This mechanism is made up of safety valve and push pedal 4, safety pole 8, push rod 12, spring 13.Push pedal 4 usefulness connecting rod 7 fixed thereon is through the chute 6 interior parallel slips of upper handle 9, and its end has lockhole, and the easing valve when the lockhole position closes up with pot cover 1 is corresponding, and the other end is made arc and pushed away groove; Safety pole 8 upper ends are fixed on push pedal 4 connecting rods 7, and the centre has the hole, garden of band stage, and the bottom places in the stopper slot 14 of lower handle 11, push rod 12 is made "T"-shaped, its right-hand member is with spring 13, and stretches parallel slip in hole, safety pole 8 garden, and the stage in the hole, garden is made the base of spring 13; Push rod 12 left ends are relative with O-ring seal 15, and when pot cover 1 did not close up, push rod 12 withstood on the O-ring seal 5, make its sealing not in place, and when pot cover 1 closed up fully, push rod 12 left O-ring seal 5 under the effect of stopper slot 14.The stopper slot 14 of lower handle 11 is determined the shape of groove according to the need of work of safety pole 8 in the upper handle 9 and push rod 12, as shown in Figure 2.

Safety valve is made up of the rubber seal seat 2 and the dress valve rod that can move up and down 3 within it that are packed on the pot cover 1.In the rubber seal seat 2 is hollow, the centre is provided with the thin mouthful neck of a sealing, valve rod 3 tops are garden post positive stop lug boss 3d, its outside dimension is slightly larger than thin mouthful of neck internal diameter size, is slightly less than push pedal 4 lockhole sizes, and a spacing frustum 3a is made in the bottom, frustum 3a establishes the bottom boss 3c, and its external diameter is greater than frustum 3a maximum outside diameter 2.5mm, and frustum 3a maximum outside diameter has on frustum 3a and the low boss 3c sidewall and lets out vapour groove 3b than thin mouthful of big 1.5mm of neck internal diameter of sealing.

Under the malfunctioning situation of pressure limiting valve, as long as pot inner pressure reaches 160～240KPa, pressure just ejects thin mouthful of neck with the spacing frustum 3a of valve rod 3, valve rod 3 is risen, and at this moment, the vapour groove 3b that lets out of valve rod 3 bottoms communicates with atmosphere, and drain steam in the pot, thereby reach the effect of common flame-arrester vent plug.

Obviously, it is strong, safe and reliable, easy to use to the utlity model has safety performance, and the advantages such as compact conformation can be applied on the pressure cooker of all size, model.

Claims (2)

1, a kind of pressure cooker uses safeties, comprise the upper handle (9) that is packed on the pot cover (1) and be packed in the lower handle (11) on pot body (10) and be contained in lower handle (9,11) self-locking mechanism between, this self-locking mechanism is by the safety valve and the push pedal (4) that is contained on the upper handle (9) that are contained on the pot cover (1), safety pole (8), spring (13), push rod (12) is formed, a valve rod that can move up and down (3) is arranged on the safety valve, at upper handle (9) but the push pedal (4) of going up parallel slip has the lockhole that matches with valve rod (3) top appearance and size, safety pole (8) upper end is connected with push pedal (4), the lower end places in the stopper slot (14) of lower handle (11), it is characterized in that: be "T"-shaped push rod (12) right-hand member and be with spring (13) and stretch in safety pole corresponding (8) hole, garden with it, but and parallel slip, push rod (12) left end is relative with O-ring seal (5), and the bottom places the stopper slot interior (14) of lower handle (11).

2, pressure cooker according to claim 1 uses safeties, it is characterized in that: safety valve is packed on the pot cover (1) by the rubber seal seat (2) of hollow, rubber seal seat (2) intermediate inner wall is provided with the thin mouthful neck of sealing, the sliding valve rod (3) that is contained in the rubber seal seat (2) is respectively equipped with, in, lower limit boss (3d, 3a, 3c), middle boss (3a) external diameter is greater than thin mouthful of neck internal diameter 1-3mm of seal receptacle, bottom boss (3c) external diameter has disappointing groove (3b) greater than more than middle boss (3a) the external diameter 2mm on valve rod (3) lower sides.

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