CN2118468U

CN2118468U - Pressure cooker lid safety explosion proof device

Info

Publication number: CN2118468U
Application number: CN 91221119
Authority: CN
Inventors: 周友华
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-11-09
Filing date: 1991-11-09
Publication date: 1992-10-14

Abstract

A pressure cooker lid safety explosion proof device conforms to the requirements of national standards. The utility model is characterized in that an upper handle is respectively provided with a set of communicating pipes (1), a spring sealing plug, the other set of communicating pipes (5), sealing membranes, a sealing cavity, a piston latch, a relief spring (10), etc.; the set of communicating pipes (1), the spring sealing plug, the other set of communicating pipes (5), the sealing membranes, the sealing cavity, the piston latch, the relief spring (10), etc., are mechanically connected into a hermetic movable structure orderly; a lower handle is provided with a set of plug push rods, a relief spring (5), the other set of latch holes, a latch push rod, a relief spring (13), etc. Corresponding to the upper handle, the communicating pipes (1), (6) are all communicated with a cooker lid; the two sets of members corresponds to orderly mechanical connection combinations respectively in the upper and the lower handles to realize that the lid is closed and opened securely. As a result, the utility model can deflate securely and automatically to reduce the pressure and can play an explosion proof role.

Description

Pressure cooker lid safety explosion proof device

The utility model relates to safety and the explosion-protection equipment that a kind of pressure cooker meets the cover closing/opening of national standard.

The present pressure cooker that uses does not all have the safety device of cover closing/opening: close when cover, need only at will to screw and press pressure limiting valve, just can boost to normal pressure work, often because of screwing the position very little, compressive resistance is too low for the result, and stretching tight to open sets off an explosion; When uncapping, no matter pot inner pressure height, as long as pot cover just can be opened can turn, and the result is often too high because of pot inner pressure, is eager to outward winding to setting off an explosion or excessively spatter high temperature food and hurt sb.'s feelings.Therefore the cover closing/opening of pressure cooker is not fool proof.The pressure cooker that uses does not at present have many cover safety anti-explosive devices simultaneously, so that the use of pressure cooker can not definitely guarantee safety.

The purpose of this utility model is the safety device that a kind of pressure cooker cover closing/opening that complies with the national standard requirements will be provided, and two cover safety anti-explosive devices.Close when covering, when pot cover must screw the home of design compressive resistance with the pot body, the air pressure in the pressure cooker just can be elevated to service pressure, otherwise pot inner pressure can not surpass 5kpa.When uncapping, pot inner pressure must drop to 5kpa when following, and pot cover just can be opened, otherwise two handles up and down of pot cover and pot body are fastened, and pot cover can not be opened.When in the pot during superpressure, but two all automatic deflation decompressions of cover anti-explosion safety devices.

The utility model is achieved like this, in the upper handle of pot cover, communicating pipe (1) one end with the pot in be connected, other end exhaust outlet is with spring sealed relative down beyond the Great Wall, close when covering, after two handles of pot cover and pot body must screw put in place (two handle consistencies from top to bottom), plug push rod in the lower handle on the correspondence position has just withstood spring sealed plug, the exhaust outlet of (1) is sealed with communicating pipe, makes pressure cooker change operate as normal over to, otherwise, spring sealed plug can be moved certainly from exhaust outlet, make its outside exhaust, and pot inner pressure is remained on below the 5kpa, cover purpose of safety and reach to close.When in the pot during superpressure, under the effect of over pressure, plunger push rod under the spring sealed plug leaves the exhaust outlet of communicating pipe (1), makes its outside exhaust decompression explosion-proof.

In the upper handle of pot cover, also be equipped with simultaneously another communicating pipe (6), one end with the pot in be connected, the other end is connected with annular seal space, and and annular seal space, diaphragm seal, piston door bolt, relief spring (10), the closed structure of mechanical connection and the activity of pressure cooker formation in turn, when pot inner pressure during greater than 5kpa, gas transfer pressure in communicating pipe (6) is pushed the motion of diaphragm seal and piston door bolt, and door bolt is gone into the door bolt hole of lower handle, two handles about the pressure cooker are fastened, and pot cover can not be opened.When pot inner pressure drops to 5kpa when following, piston is latched under the promotion of elastic force of relief spring (10), withdraws from the door bolt hole fully, and this moment, pot cover just can be opened, and reached the purpose of safety of uncapping.When in the pot during superpressure, over pressure is promoted diaphragm seal, piston door bolt and door bolt push rod and is moved downward by the gas transfer of communicating pipe (6), makes the outside exhaust decompression of annular seal space steam vent explosion-proof.The elastic force size of three springs of control plug push rod, piston door bolt and door bolt push rod is regulated by three bolts, nut structure respectively according to security needs.

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1, be that pressure cooker closes lid back and goes up lower handle and cover closing/opening safety anti-explosive device front view.

Fig. 2, be upper handle and cover closing/opening safety anti-explosive device upward view.

Fig. 3, be lower handle and cover closing/opening safety anti-explosive device vertical view.

Fig. 4, be that pressure cooker safety is closed lid back handle crosscut cutaway view up and down.

Fig. 5, be pressure cooker safety close lid back and uncap before pot inner pressure less than 5kpa, the rip cutting position assumption diagram when last lower handle is not fastened.

Fig. 6,8, pressure cooker safety are closed lid back pot inner pressure greater than 5kpa, normal pressure position assumption diagram when last lower handle is fastened.

Fig. 7, the 9th, two cover safety anti-explosive setting position structure charts (exhaust outlet (2) automatic deflation of communicating pipe this moment (1), three steam vents of annular seal space are automatic deflation also) when superpressure is explosion-proof

Among the figure, 1-communicating pipe, 2-communicating pipe exhaust outlet, the spring sealed plug of 3-, 4-fills in push rod, the 5-relief spring, 6-communicating pipe, 7-annular seal space, 8-diaphragm seal, 9-piston door bolt, the 10-relief spring, 11-fastens the hole with a bolt or latch, 12-fastens push rod with a bolt or latch, 13-relief spring, 14-annular seal space steam vent, the 15-upper handle, 16-lower handle, 17-brute spring, 18-annular seal space steam vent, 19-annular seal space steam vent, 20-pressure cooker.

With reference to accompanying drawing, close when covering, if pot cover is only at will screwed, when two handles do not have consistency from top to bottom, use though add pressure limiting valve, but because plug push rod (4) off normal, thereby can not withstand spring sealed plug (3), and the exhaust outlet (2) of communicating pipe (1) is outwards exhaust just, and the pot internal gas pressure just can't be elevated to operating pressure, and can remain on below the 5kpa, so pressure cooker can not stretched tight and holds and explode.Thereby prevented that pot cover does not screw and puts in place and recurrent dangerous accident when the working pressure pot.

When pot cover screws put in place (when two handles have alignd up and down) clockwise with upper handle (15), plug push rod (4) has just withstood spring sealed plug (3), the exhaust outlet (2) of communicating pipe (1) is sealed up, make pressure cooker change normal operating conditions over to, pot inner pressure just constantly raises, greater than 5kpa the time, pressure arrives annular seal space (7) by the gas transfer of communicating pipe (6), compressing diaphragm seal (8), promote piston door bolt (9) and move downward ［ having compressed relief spring (10) simultaneously ］, door bolt is gone in the door bolt hole (11) of lower handle (16), and two handles about the pressure cooker are fastened, and pressure cooker can not be opened.

When uncapping, must first breakdown pressure limiting valve venting reduce pressure, along with constantly reducing of pot inner pressure, piston door bolt (9) is subjected to the promotion of relief spring (10) elongation elastic force, constantly withdraws from door bolt hole (11), when pot inner pressure is reduced to 5kpa when following, piston door bolt (9) has all withdrawed from the door bolt hole (11) of lower handle (16), pressure cooker just can be opened safely, thereby has prevented because of pot inner pressure when too big, is eager to uncap and the dangerous accident that causes.

When pot inner pressure surpassed operating pressure, spring sealed plug (3) forced plug push rod (4) to move downward under the promotion of super operating pressure, thereby the just outwards exhaust of exhaust outlet (2) of communicating pipe (1), makes the very fast decline of pot inner pressure; At the same time, diaphragm seal (8) and piston door bolt (9) are same under the promotion of super operating pressure, force door bolt push rod (12) to move downward, thereby make annular seal space steam vent (14), (18), (19) outwards exhaust, can make the very fast decline of pot inner pressure equally.Like this, when the normal exhaust passage of pressure cooker gets clogged and safety lock valve when malfunctioning, increased by two cover automatic safe safeties again.

Safety device breaks down piston door bolt (9) can not withdraw from door bolt hole (11) time if pressure cooker is uncapped, on push bolt push rod (12) just pot cover can be opened.

Claims

1, a kind of pressure cooker cover closing/opening safety anti-explosive device, it is characterized in that being provided with one group of logical repeatedly (1), spring sealed plug, plug push rod, relief spring (5) in two handles up and down, reaching another group communicating pipe (6), annular seal space, diaphragm seal, piston door bolt, relief spring (10), brute spring, door bolt hole, door bolt push rod, relief spring (13), two groups of members are corresponding respectively up and down in handle, in turn the mechanical connection correlation combiner become with pot in be connected can airtight activity structure.

2, cover closing/opening safety anti-explosive device according to claim 1, be connected in an end that it is characterized in that communicating pipe (1) in the handle and the pressure cooker, other end exhaust outlet is with spring sealed relative down beyond the Great Wall, corresponding plug push rod and the relief spring (5) of being equipped with spring sealed plug in another handle, relief spring (5) lower end has one to regulate bolt.

3, cover closing/opening safety anti-explosive device according to claim 1, it is characterized in that in the handle communicating pipes (6) one end with pot in be connected, the other end is connected with annular seal space, there are steam vent and exterior in the capsule walls middle part, brute spring is housed in it, the piston door bolt, piston latches end and connects diaphragm seal, relief spring (10) is equipped with at the middle part, the lower end is relative up and down with the door bolt hole, communicating pipe (6), annular seal space, the normal position of diaphragm seal and piston door bolt constitutes the airtight bascule that is connected with pressure cooker, the door bolt hole is located on another handle, the door bolt push rod is equipped with in bottom, door bolt hole, its upper end is with pad, relief spring (13), the middle part is with secured adjusted bolt, lower end band nut.