Pressure limiting valve of pressure cooker

Abstract

A pressure limiting valve of a pressure cooker comprises an outer valve body and an inner valve body, the outer valve body comprises a first valve sleeve made of plastic and a second valve sleeve which is located in the first valve sleeve and made of metal, and the first valve sleeve and the second valve sleeve are integrated; a plurality of protruding adjusting feet are evenly distributed on the outer side face of the first valve sleeve and extend downwards to exceed the lower end face of the first valve sleeve. The inner valve body comprises a metal third valve sleeve sleeved in the second valve sleeve, the upper end of the third valve sleeve is provided with a plastic bonnet which is integrated with the third valve sleeve, the diameter of the bonnet is larger than that of the third valve sleeve, the bonnet is provided with an exhaust hole communicated with an inner cavity of the third valve sleeve, the back face of the bonnet is further provided with a sealing piece, and the sealing piece extends into the inner cavity of the third valve sleeve; the valve bonnet is located above the first valve sleeve and the second valve sleeve, an anti-disengaging clamping ring is arranged on the lower portion of the outer side face of the third valve sleeve, a step is formed by a concave portion of the lower portion of the inner side wall of the second valve sleeve, and the step of the second valve sleeve abuts against the anti-disengaging clamping ring in the free state.

Description

Technical Field

[0001] The utility model relates to a pressure limiting valve for a pressure cooker. Background Art

[0002] The pressure-limiting valve of a pressure cooker typically includes an outer valve body and an inner valve body that can move up and down within the outer valve body. The inner valve body includes a valve core and a valve cap disposed above the valve core. The valve core has a vent cavity, and the valve cap has an exhaust hole corresponding to the vent cavity. The valve core is typically made of metal, while the valve cap is typically made of plastic. In the prior art, the connection between the valve cap and the valve core is achieved by forming a barb on the valve cap and providing a hook groove on the valve core, into which the barb hooks. However, this method also has the disadvantage that the plastic barb is easily deformed or even broken when forcibly hooked into the hook groove, thus posing a significant risk to the stability of the connection. Furthermore, when the pressure-limiting valve is removed from the pressure cooker, the valve cap is easily pulled off due to insufficient connection strength. Summary of the Invention

[0003] In order to overcome the above-mentioned deficiencies of the existing pressure limiting valve for pressure cookers, the utility model provides a pressure limiting valve for pressure cookers with a more stable structure.

[0004] The utility model solves the technical problem with a technical solution: a pressure limiting valve for a pressure cooker, comprising an outer valve body and an inner valve body,

[0005] The outer valve body comprises a first valve sleeve made of plastic material and a second valve sleeve made of metal located inside the first valve sleeve, wherein the first valve sleeve and the second valve sleeve are integrated;

[0006] A plurality of raised adjustment feet are evenly distributed on the outer side surface of the first valve sleeve, and the adjustment feet extend downward to exceed the lower end surface of the first valve sleeve;

[0007] The inner valve body includes a metal third valve sleeve sleeved in the second valve sleeve, the upper end of the third valve sleeve is provided with a plastic valve cap integral therewith, the diameter of the valve cap is larger than the diameter of the third valve sleeve, the valve cap is provided with an exhaust hole communicating with the inner cavity of the third valve sleeve, and the back of the valve cap is also provided with a sealing member, which extends into the inner cavity of the third valve sleeve;

[0008] The valve cap is located above the first valve sleeve and the second valve sleeve, and an anti-dropping ring is provided at the lower part of the outer side surface of the third valve sleeve. The lower recessed part of the inner side wall of the second valve sleeve forms a step, and the step sleeve of the second valve sleeve rests on the anti-dropping ring in the free state.

[0009] Furthermore, the upper end surface of the first valve sleeve is flush with the upper end surface of the second valve sleeve.

[0010] Furthermore, a retaining ring extends upward from the upper end surface of the first valve sleeve.

[0011] Furthermore, the first valve sleeve is also provided with a handle.

[0012] Furthermore, a concave groove is provided on the lower portion of the outer side surface of the third valve sleeve, and the anti-dropping collar is clamped in the groove.

[0013] Furthermore, when the back surface of the valve cap contacts the upper end surface of the second valve sleeve, the clamping groove is exposed outside the second valve sleeve.

[0014] Furthermore, the sealing element is a metal or non-metal sealing ball.

[0015] Furthermore, a metal rivet is provided on the back of the valve cap. The rivet is integrally formed with the valve cap. The rivet has a rivet groove opening downward, and the sealing ball is embedded in the rivet groove.

[0016] Furthermore, an elastic retaining spring corresponding to the inner cavity of the third valve sleeve is provided at the bottom of the third valve sleeve.

[0017] Furthermore, the bottom of the third valve sleeve has an interlayer, and the elastic retaining spring is embedded in the interlayer.

[0018] The beneficial effects of the utility model are that the first valve sleeve and the second valve sleeve are integrated, and the valve cap and the third valve sleeve are integrated, and the structure is extremely stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the present utility model.

[0020] Figure 2 It is a schematic diagram of the cooperation between the pressure limiting valve of the utility model and the exhaust pipe of the pressure cooker.

[0021] Figure 3 It is a structural diagram of the inner valve body.

[0022] Figure 4 It is a structural diagram of the inner valve body from another perspective.

[0023] Figure 5 It is a partial exploded view of the inner valve body.

[0024] Figure 6 It is a structural diagram of the outer valve body.

[0025] Figure 7 It is a structural diagram of the outer valve body from another perspective.

[0026] Figure 8 Schematic diagram of the structure of the first valve sleeve.

[0027] Figure 9It is a structural schematic diagram of an elastic retaining spring and an exhaust pipe of a pressure cooker. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Reference Figures 1-9 A pressure limiting valve for a pressure cooker includes an outer valve body A and an inner valve body B.

[0030] The outer valve body A includes a first valve sleeve 1 made of plastic and a second valve sleeve 2 made of metal located inside the first valve sleeve 1. The first valve sleeve 1 and the second valve sleeve 2 are integrated, that is, the plastic first valve sleeve 1 is injection molded on the metal second valve sleeve 2, and the two are integrated into one, and the connection between the two is extremely stable.

[0031] A plurality of raised adjusting feet 4 are evenly distributed on the outer side surface of the first valve sleeve 1 , and the adjusting feet 4 extend downward to exceed the lower end surface of the first valve sleeve 1 .

[0032] The inner valve body B comprises a metal third valve sleeve 3 that is sheathed within the second valve sleeve 2. A plastic valve cap 5 is integrally mounted on the upper end of the third valve sleeve 3. Specifically, the plastic valve cap 5 is injection-molded onto the metal third valve sleeve 3, creating an integral, highly stable connection. The valve cap 5 has a larger diameter than the third valve sleeve 3 and is provided with a vent hole that communicates with the inner cavity of the third valve sleeve 3. A seal 6 is also provided on the back of the valve cap 5, extending into the inner cavity of the third valve sleeve 3.

[0033] The valve cap 5 is located above the first valve sleeve 1 and the second valve sleeve 2. The lower part of the outer side surface of the third valve sleeve 3 is provided with an anti-dropping ring 7. The lower recessed part of the inner wall of the second valve sleeve 2 forms a step 8. In the free state, the step 8 of the second valve sleeve rests on the anti-dropping ring 7.

[0034] The lid of the pressure cooker is provided with a valve slot, into which extends an exhaust pipe 9. During use, the pressure-limiting valve of the present invention is placed into the valve slot, and the exhaust pipe 9 of the pressure cooker is inserted into the inner cavity of the third valve sleeve 3, so that the sealing member 6 on the valve cap 5 blocks the air outlet at the upper end of the exhaust pipe 9. In order to achieve a better sealing effect, the sealing member 9 can be a metal or non-metallic sealing ball. Of course, the sealing member can also be in other shapes, such as a cone. In order to provide the sealing ball, in one embodiment, a metal rivet 10 is provided on the back of the valve cap 5. The rivet 10 is integrally formed with the valve cap 5, that is, the plastic valve cap 5 is injection-molded on the metal rivet 10, and the two are integrated and very strong. The rivet 10 has a rivet groove opening downward, and the sealing ball is embedded in the rivet groove.

[0035] The pressure limiting valve can be set to different gears, for example, 120kPa, 60kPa, and exhaust. The adjustment method for achieving different gears is as follows: an adjustment slope is provided on the bottom surface of the valve slot, and a low-position notch between the adjustment slopes. The adjustment slope has a first positioning point at a lower position and a second positioning point at a higher position. The adjustment foot 4 on the first valve sleeve 1 corresponds to the adjustment slope. When the adjustment foot 4 is in the low-position notch between the adjustment slopes, the adjustment foot 4 is in a suspended state, and the outer valve body A is in a free state, that is, the outer valve body A is in a low position under its own gravity. At this time, the step 8 of the second valve sleeve 2 presses on the anti-slip ring 7. The pressure limiting valve is pressed on the exhaust pipe 9 by the front weight of its outer valve body A and inner valve body B. Therefore, the highest air pressure gear of 120kPa is corresponding at this time. The outer valve body A is rotated to make the adjustment foot 4 on the first valve sleeve 1 rise along the adjustment slope until it reaches the first positioning point at the lower position. At this time, the outer valve body A rises, and the step 8 of the second valve sleeve 2 no longer abuts. The anti-drop ring 7, so the weight of the outer valve body A is no longer applied to the exhaust pipe 9. At this time, the pressure limiting valve is pressed on the exhaust pipe 9 with the full weight of its inner valve body B. Therefore, the corresponding position at this time is the secondary high pressure gear of 60kPa. When the outer valve body A is rotated, the adjustment foot 4 on the first valve sleeve 1 continues to rise along the adjustment slope until it reaches the first positioning point at a higher position. At this time, the outer valve body A rises further and contacts the valve cap 5 of the inner valve body B, thereby driving the valve cap 5 to rise, that is, driving the inner valve body B to rise, so that the seal 6 on the inner valve body no longer blocks the exhaust pipe 9. At this time, the corresponding position is the exhaust gear. In order to facilitate the rotation of the outer valve body, a handle 11 can be provided on the first valve sleeve 1, and the outer valve body can be rotated by turning the handle 11.

[0036] In one embodiment, the upper end surface of the first valve sleeve 1 and the upper end surface of the second valve sleeve 2 are flush, and the structure is reasonable. When the pressure limiting valve is in the exhaust position, the upper end surface of the first valve sleeve 1 and the upper end surface of the second valve sleeve 2 are in contact with the valve cap 5 of the inner valve body, thereby driving the valve cap 5 to rise.

[0037] In one embodiment, a retaining ring 12 is further extended upward from the upper end surface of the first valve sleeve 1 , and the valve cap 5 is located in the retaining ring 12 .

[0038] In one embodiment, the anti-slip collar 7 is installed as follows: a concave groove 13 is provided on the lower portion of the outer side surface of the third valve sleeve 3, and the anti-slip collar 7 is clamped in the groove 13. When the back surface of the valve cap 5 contacts the upper end surface of the second valve sleeve 2, the groove 13 is exposed outside the second valve sleeve 2. The significance of this structural setting is that since the third valve sleeve 3 and the valve cap 5 are integrated, and the diameter of the valve cap 5 is larger than the diameter of the third valve sleeve 3, when installing the inner valve body B, the third valve sleeve 3 of the inner valve body B can only be inserted from top to bottom into the inner cavity of the second valve sleeve 2, and the anti-slip collar 7 must be installed later, otherwise the third valve sleeve 3 of the inner valve body B cannot be inserted into the inner cavity of the second valve sleeve 2. When the anti-dropping clamping ring is installed later, since the back of the valve cap 5 contacts the upper end surface of the second valve sleeve 2, the clamping groove 13 is exposed outside the second valve sleeve 2, so the anti-dropping clamping ring 7 can be smoothly clamped in the exposed clamping groove 13.

[0039] In one embodiment, the bottom of the third valve housing 3 is further provided with an elastic retaining spring 14 corresponding to the inner cavity of the third valve housing 3. Specifically, a sandwich layer can be provided at the bottom of the third valve housing 3, and the elastic retaining spring 14 is embedded in the sandwich layer. The significance of the elastic retaining spring 14 is that the upper portion of the exhaust pipe 9 has a larger diameter. When the exhaust pipe 9 is inserted upward into the third valve housing 3, the larger diameter portion of the exhaust pipe 9 passes through the elastic retaining spring 14. Even if the pressure cooker lid is turned over to face down, the elastic retaining spring 14 is blocked by the larger diameter portion of the exhaust pipe 9, and the pressure limiting valve will not fall out.

[0040] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] The above describes the implementation methods of the present invention. However, the present invention is not limited to the above implementation methods. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A pressure-limiting valve for a pressure cooker, comprising an outer valve body and an inner valve body, characterized in that: The outer valve body comprises a first valve sleeve made of plastic material and a second valve sleeve made of metal located inside the first valve sleeve, wherein the first valve sleeve and the second valve sleeve are integrated; A plurality of raised adjustment feet are evenly distributed on the outer side surface of the first valve sleeve, and the adjustment feet extend downward to exceed the lower end surface of the first valve sleeve; The inner valve body includes a metal third valve sleeve sleeved in the second valve sleeve, the upper end of the third valve sleeve is provided with a plastic valve cap integral therewith, the diameter of the valve cap is larger than the diameter of the third valve sleeve, the valve cap is provided with an exhaust hole communicating with the inner cavity of the third valve sleeve, and the back of the valve cap is also provided with a sealing member, which extends into the inner cavity of the third valve sleeve; The valve cap is located above the first valve sleeve and the second valve sleeve, and an anti-dropping ring is provided at the lower part of the outer side surface of the third valve sleeve. The lower recessed part of the inner wall of the second valve sleeve forms a step, and the step of the second valve sleeve rests on the anti-dropping ring in the free state.

2. The pressure limiting valve for a pressure cooker according to claim 1, wherein: The upper end surface of the first valve sleeve is flush with the upper end surface of the second valve sleeve.

3. The pressure limiting valve for a pressure cooker according to claim 2, wherein: A retaining ring is further extended upward from the upper end surface of the first valve sleeve.

4. The pressure limiting valve for a pressure cooker according to claim 1, wherein: The first valve sleeve is also provided with a handle.

5. The pressure limiting valve for a pressure cooker according to claim 2, wherein: A concave clamping groove is provided at the lower portion of the outer side surface of the third valve sleeve, and the anti-dropping clamping ring is clamped in the clamping groove.

6. The pressure limiting valve for a pressure cooker according to claim 5, wherein: When the back surface of the valve cap contacts the upper end surface of the second valve sleeve, the clamping groove is exposed outside the second valve sleeve.

7. The pressure limiting valve for a pressure cooker according to any one of claims 1 to 6, characterized in that: The sealing element is a metal or non-metal sealing ball.

8. The pressure limiting valve for a pressure cooker according to claim 7, wherein: A metal rivet is provided on the back of the valve cap. The rivet is integrally formed with the valve cap. The rivet has a rivet groove opening downward, and the sealing ball is embedded in the rivet groove.

9. The pressure limiting valve for a pressure cooker according to any one of claims 1 to 6, characterized in that: The bottom of the third valve sleeve is further provided with an elastic retaining spring corresponding to the inner cavity of the third valve sleeve.

10. The pressure limiting valve for a pressure cooker according to claim 9, wherein: The bottom of the third valve sleeve is provided with an interlayer, and the elastic retaining spring is embedded in the interlayer.

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