CN2296681Y

CN2296681Y - Multiple explosion-proof pressure cooker

Info

Publication number: CN2296681Y
Application number: CN 97215900
Authority: CN
Inventors: 顾***
Original assignee: QIDONG CITY COOKER FACTORY
Current assignee: QIDONG CITY COOKER FACTORY
Priority date: 1997-06-06
Filing date: 1997-06-06
Publication date: 1998-11-11
Anticipated expiration: 2007-06-06

Abstract

The utility model relates to a multiple explosion-proof pressure cooker. The utility model is characterized in that a cooker cover is provided with an oblong positioning hole which is used for inserting a sealing ring with a positioning clamp; when the pressure cooker is in the state of overpressure, the sealing ring at the positioning hole can discharge gas and release pressure; simultaneously, a vaulted gap with an inward arc is arranged on the outer circumference of a sealing ring which is positioned at the inner side of the other part without curving teeth beyond the positioning hole of the cooker cover; a vaulted lug boss with an inward arc is arranged at the bottom of a groove of the sealing ring, and the sealing ring and the vaulted gap have an identical symmetrical shaft; when the pressure cooker is in the state of overpressure, if the sealing ring at the point of the positioning hole can not release pressure, the sealing rings at the point of the vaulted gap can consecutively release pressure to prevent against explosion; both planes of the sealing ring are provided with uniform slide-aid convex points which are favorable for the normal exertion of the explosion-proof function.

Description

Multiple explosion-proof pressure pot

The utility model belongs to the improvement to the pressure cooker explosion prevention function.

The blast resistance construction of existing pressure cooker, all relevant with sealing ring.For example: have on the facade at the non-curved tooth of the pot cover outer rim position of pressure cooker, offer the sealing ring overvoltage and eject the hole; What have outwards protrudes one section to the facade at the non-curved tooth of pot cover outer rim position part, forms the sealing ring overvoltage and ejects the chamber.In order to make the sealing ring step-down of successfully losing heart when the overvoltage, what have has set up pressure relief opening on the pot mouth, and what have has set up relief hole on pot cover.Again for example: a kind of pressure cooker, only on seal ring with outer, offer breach, breach distortion during overvoltage causes that the lip limit deviates from a pot mouthful disappointing step-down; Another kind of pressure cooker, except that on seal ring with outer, offering the breach, also offer boss at the channel bottom of sealing ring, or on sealing ring lip limit, offer small gap, it is with being intended to not shorten pot seal section length of mouth, to remedy the shallow deficiency of notch depth on the seal ring with outer, it is general on pressure cooker to be convenient to sealing ring.Aforesaid pressure cooker blast resistance construction, common shortcoming be exactly explosion-proof point very little.Because the shape and size precision and the material hardness of sealing ring manufacturing exist changing factor, cause sealing ring pressure release force value in actual use instability.For example, produced sealing ring in same mould, material difference, its shrinkage factor are also different, have caused the inconsistent of geomery; Feeding how much, caused the inconsistent of lip limit gauge.Again for example, the hardness number of sealing ring increases along with material aging, and in use because the embedding of foreign matter is stifled, causes the situation of explosion-proof point failure also can take place.Therefore, these blast resistance constructions are difficult to guarantee that pressure cooker does not go out contingency in long-term use.

The purpose of this utility model is to provide a kind of novel pressure cooker with multiple explosion prevention construction.

The utility model is intended to further increase the explosion-proof point of pressure cooker, reduces the probability of pressure cooker blast.

The purpose of this utility model is achieved in that on the cylindrical of usual pressure pot sealing ring, outwards makes a plug-in type positioning checkpoint, offers a concave indentation in the central authorities of positioning checkpoint, and the both sides of positioning checkpoint is the dop of barb.On the facade at the non-curved tooth of the pot cover outer rim position of usual pressure pot, rectangle of punching out or Long Circle locating hole, the positioning checkpoint of sealing ring is inserted in the pot cover locating hole, and the dop of positioning checkpoint both sides ejects after seeing through locating hole, and barb is on the pot cover outer edge surface.With the pot cover step surface of rectangle or the same symmetry axis of Long Circle locating hole on, circular relief hole of punching out.Behind the sealing ring location, on the seal ring with outer of the facade inboard at other non-curved tooth position of pot cover outer rim, offer the inside arch breach of arc, offer the inside arch boss of arc in o-ring groove bottom with the same symmetry axis of arch breach.On sealing ring two planes, be provided with and help sliding salient point uniformly.Sealing ring locating hole on the pot cover can be arranged on the installation position of upper handle, also can be arranged on other non-curved tooth position.

Pressure cooker with this structure, each non-curved tooth position of pot cover all is provided with explosion-proof point.When the pressure cooker superpressure, the sealing ring at positioning checkpoint place outwards is out of shape, outstanding rectangle or Long Circle locating hole.When the lip limit of sealing ring herein outwards was extruded into relief hole on the pot cover step surface by pressure, overvoltage steam is just discharged step-down from relief hole explosion-proof; If the pressure release value of positioning checkpoint place sealing ring is high slightly, the arch breach that then is located on the seal ring with outer continues outwards distortion, wherein has a lip limit of tearing herein at first to break away from pot mouth, pressure-relief explosion-proof; If some explosion-proof point failure, other explosion-proof point can also continue to bring into play explosion prevention function, and safety coefficient improves greatly.Owing to set up on two planes of sealing ring and helped sliding salient point uniformly, the frictional force in the time of reducing the sealing ring distortion helps the normal performance of explosion prevention function.In order not influence the outward appearance of pressure cooker, the locating hole of sealing ring can be arranged on the pot cover cylindrical of upper handle installation position.

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

Fig. 1 is the structural representation of the utility model pot cover when opening.

Fig. 2 is the amplification view of A-A among the utility model Fig. 1.

Fig. 3 is the structural representation of the utility model sealing ring.

Fig. 4 is the utility model schematic diagram during exhaust in the pot cover relief hole.

Fig. 5 is the schematic diagram of the utility model when the final vacuum of the lip limit of sealing ring arch indentation, there disengaging pot mouth.

Fig. 6 is the amplification view of B-B among the utility model Fig. 3.

Fig. 7 is the amplification view of C-C among the utility model Fig. 3.

Fig. 8 be among the utility model Fig. 3 B to zoomed-in view.

On the cylindrical of usual pressure pot sealing ring (1), outwards make a plug-in type positioning checkpoint (6), offer a concave indentation (4) in the central authorities of positioning checkpoint (6), the both sides of positioning checkpoint (6) is the dop of shape such as barb.On the facade (8) at the non-curved tooth of pot cover (7) the outer rim position of upper handle (5) installation position, a rectangle locating hole of punching out (12), in the locating hole (12) on positioning checkpoint (6) the insertion pot cover (7) of sealing ring (1), the dop of positioning checkpoint (6) both sides sees through locating hole (12) back and ejects, and barb is on the outer rim facade (8) of pot cover (7).With the step surface of the pot cover (7) of the same symmetry axis of locating hole (12) on, a circular relief hole of punching out (11).Behind sealing ring (1) location, on sealing ring (1) cylindrical of other outer rim facade (8) inboard in addition, the curved tooth position (3) of pot cover, offer the inside arch breach (2) of arc, with the o-ring groove (14) of the same symmetry axis of arch breach (2) bottom, offer the inside arch boss (10) of arc.On two planes of O-ring (1), be provided with and help sliding salient point (9) uniformly.When the pressure cooker superpressure, the sealing ring (1) that positioning checkpoint (6) is located is distortion outwards, outstanding locating hole (12), when outer lip limit (13) and epipharynx limit (15) herein by pot inner pressure during the corresponding relief hole (11) that outwards is extruded on the pot cover (7), overvoltage steam is just discharged from relief hole (11), and step-down is explosion-proof.Arch breach (2) on sealing ring (1) cylindrical also can outwards be out of shape during overvoltage, and when positioning checkpoint (6) when locating not pressure release, the outer lip limit (13) that arch breach (2) is located and epipharynx limit (15) are just deviate from the pot mouthful (17) on pot body (16), pressure-relief explosion-proof in succession.When sealing ring (1) pressurized outwards was out of shape, the sliding salient point (9) that helps on its two plane was contacted with respectively between pot cover (1) step surface and the last plane of pot mouthful (17), can reduce the frictional force of sealing ring.

Claims

1. multiple explosion-proof pressure pot, it is characterized in that: on the cylindrical of sealing ring (1), be provided with a positioning checkpoint (6) of outwards pegging graft, central authorities at positioning checkpoint (6) are provided with a concave indentation (4), are provided with the dop of shape such as barb in the both sides of positioning checkpoint (6).On the pot cover outer rim facade (8) of upper handle (5) inboard, be provided with a rectangle locating hole (12).Positioning checkpoint (6) inserts locating hole (12), and the dop barb is on pot cover outer rim facade (8).With the step surface of the pot cover (7) of the same symmetry axis of locating hole (12) on, be provided with a circular relief hole (11).

2. multiple explosion-proof pressure pot according to claim 1, it is characterized in that: on the cylindrical of the sealing ring (1) that other pot cover outer rim facade (8) beyond upper handle (5) installation position is inboard, be provided with the inside arch breach (2) of arc, with the o-ring groove (14) of the same symmetry axis of arch breach (2) bottom, be provided with the inside arch boss (10) of arc.

3. according to claim 1 and 2 described multiple explosion-proof pressure pots, it is characterized in that: sealing ring (1) two plane is provided with and helps sliding salient point (9) uniformly.