Valve element assembly and pressure cooker

Abstract

The utility model discloses a valve core component, which belongs to the technical field of sealing of pressure limiting valves of pressure cookers and comprises a valve core seat and a valve core, a valve core hole is arranged on the valve core seat, the valve core is arranged in the valve core hole, and the vertical depth of the valve core hole is smaller than the vertical length of the valve core. The maximum width part of the transverse section of the valve element is located between the port face and the bottom end face of the valve element hole, and the width of the transverse section of the port face of the valve element hole is smaller than the maximum width of the transverse section of the valve element. The position relation and the connection relation between the valve element and the valve element seat are strictly controlled, so that the valve element is stable and not prone to falling off after being installed in the valve element hole, and it is guaranteed that after the valve element is installed in the valve element seat, a space for making contact with an exhaust port of an exhaust pipe can be reserved. The utility model further discloses a pressure cooker which comprises a cooker body, a cooker cover, an exhaust pipe and a pressure limiting valve, the valve element assembly is applied to the pressure cooker, and one part of the valve element is in tight contact with the exhaust port of the exhaust pipe so as to seal the exhaust port.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure cooker sealing, in particular to a valve core component of a pressure limiting valve used in a pressure cooker. Background Art

[0002] Pressure cookers can not only cook rice, but also cook hard-to-cook ingredients relatively quickly because of their high pressure function. They are very popular among consumers and have entered thousands of households. As the core component of pressure cookers to control pressure, the pressure limiting valve has also undergone many structural innovations. The sealing methods of the pressure limiting valve of pressure cookers mainly include the following two types:

[0003] One is that the valve core of the pressure limiting valve is made of metal, which is machined into a cone shape and inserted into the exhaust pipe for sealing. However, the metal valve core is machined, which may cause processing errors such as eccentricity, and the exhaust pipe will also have burrs or bruises at the mouth of the exhaust pipe after machining, which may cause long-term micro-leakage when it cooperates with the valve core for sealing.

[0004] The second is that the valve core of the pressure limiting valve is made of silicone material, which is formed by a mold and inserted into the exhaust pipe for sealing. The exhaust pipe has tiny burrs during the machining process, and when it is matched with the softer silicone valve core, there will be no leakage problem at the beginning. However, silicone will soon age under the action of high temperature, high pressure, acid, alkali and salt for a long time, and the silicone valve core will definitely leak after aging.

[0005] In order to solve the above technical problems, the applicant proposed a new spherical pressure limiting valve sealing structure in 2015: the valve core adopts industrially produced standard balls, such as steel balls, ceramic balls, etc., and the inner wall of the exhaust pipe mouth is chamfered. The spherical surface of the spherical valve core and the chamfered surface are tangent to each other to form a sealing system, thereby avoiding the defect of air leakage at the exhaust pipe mouth due to burrs generated by machining. Furthermore, the connecting piece and the spherical valve core are connected through a shrinking structure to form a spherical valve core assembly (publication number: CN205107324U).

[0006] Although the above-mentioned disclosed technical solution can well solve some of the aforementioned technical problems, it fails to further study the connection relationship between the valve core and the connecting piece, resulting in a very unstable connection between the valve core and the connecting piece. The valve core is easy to fall off from the connecting piece, and when the valve core and the exhaust pipe form a sealing system, there may be insufficient contact surface between the valve core and the exhaust port, resulting in a loose seal. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to strictly control the position relationship and connection relationship between the valve core and the valve core seat, so that the valve core is stable and not easy to fall off after being installed in the valve core seat, and to ensure that the valve core can leave space for contact with the exhaust port of the exhaust pipe after being installed in the valve core seat.

[0008] In order to achieve the above object, the utility model provides a valve core assembly, including a valve core seat and a valve core, wherein a valve core hole is arranged on the valve core seat, and the valve core is arranged in the valve core hole, and the vertical depth L of the valve core hole is 阀芯孔 Less than the vertical length L of the valve core 阀芯 The maximum width of the transverse cross-section of the valve core is located between the port surface and the bottom end surface of the valve core hole, and the transverse cross-section width W of the port surface of the valve core hole 端口面 Smaller than the maximum width W of the transverse cross section of the valve core 阀芯max .

[0009] Preferably, the valve core is a spherical valve core.

[0010] As a preferred embodiment, the diameter d of the spherical valve core is 阀芯 The vertical depth L of the valve core hole 阀芯 The hole relationship is as follows: 1 / 2d 阀芯 <L 阀芯孔 <2 / 3d 阀芯 .

[0011] Preferably, the transverse cross-sectional width of the valve core hole gradually decreases from the position corresponding to the surface where the diameter of the spherical valve core is located to the port surface, and the transverse maximum cross-sectional width of the valve core hole is greater than or equal to the diameter d of the spherical valve core. 阀芯 .

[0012] As a preference, the transverse cross-sectional width W of the bottom end face of the valve core hole is 底端面 Size: 1.05mm≤W 底端面 ≤10.05mm; the diameter d of the spherical valve core 阀芯 The size is: 1mm≤d 阀芯 ≤10mm.

[0013] As a further preferred embodiment, the diameter d of the spherical valve core is 阀芯 The size is: 2mm≤d 阀芯 ≤8mm.

[0014] In order to achieve the above-mentioned purpose, the utility model also provides a pressure cooker, comprising a pot body, a pot cover, an exhaust pipe and a pressure limiting valve, wherein the pot cover is used to open and close the pot body, and any one of the valve core components described above; the valve core seat is arranged in the internal cavity of the pressure limiting valve; the exhaust pipe passes through the pot cover and is fixed to the pot cover, and the exhaust pipe communicates with the inside and outside of the pot body; a part of the valve core is in close contact with the exhaust port of the exhaust pipe to form a seal for the exhaust port.

[0015] Preferably, a chamfer is formed at the exhaust port of the exhaust pipe, and a portion of the valve core is in close contact with the chamfer to form a seal for the exhaust port.

[0016] Preferably, a rounded corner is formed at the exhaust port of the exhaust pipe, and a portion of the valve core is in close contact with the rounded corner to form a seal for the exhaust port.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) Since the vertical depth of the valve core hole is smaller than the vertical length of the valve core, when the valve core is assembled into the valve core hole, part of the valve core is definitely exposed outside the valve core hole, and when used to seal the exhaust port of the pressure cooker, it is ensured that part of the valve core is definitely in contact with the exhaust port;

[0019] (2) Since the maximum width of the transverse cross-section of the valve core is located between the end face and the bottom end face of the valve core hole, and the transverse cross-section width of the end face of the valve core hole is smaller than the maximum width of the transverse cross-section of the valve core, when assembling the valve core to the valve core hole, ensure that the maximum width of the transverse cross-section of the valve core is encapsulated in the valve core hole by the end face of the valve core hole whose transverse cross-section width is smaller than that, so that the valve core is more stable after being assembled to the valve core hole and is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the valve core seat of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the valve core and valve core seat after being assembled in the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the valve core assembly of the utility model after being assembled with the pressure cooker;

[0023] Figure 4 This is a structural schematic diagram of an embodiment of the valve core and the exhaust port seal of the utility model;

[0024] Figure 5 The utility model is a structural schematic diagram of another embodiment of the valve core and the exhaust port seal.

[0025] The symbols in the figure are explained as follows:

[0026] Valve core seat-1; valve core hole-11; end surface of the valve core hole-111; bottom end surface of the valve core hole-112; valve core-2; pot cover-3; exhaust pipe-4; exhaust port-41; pressure limiting valve-5. DETAILED DESCRIPTION

[0027] The present invention will be described in more detail below in conjunction with the accompanying drawings. It should be noted that the following description of the present invention with reference to the accompanying drawings is only illustrative and not restrictive.

[0028] Where possible, the various different embodiments described below may be recombined with each other to form other embodiments not shown in the following description; the various different technical features described below may also be recombined with each other to form other embodiments not shown in the following description.

[0029] Embodiment 1

[0030] See also Figure 1-2 In order to ensure that the valve core is stable and not easy to fall off after being installed in the valve core seat, and to ensure that the valve core can leave space for contact with the exhaust port of the exhaust pipe after being installed in the valve core seat, this embodiment provides a valve core assembly, including:

[0031] The valve core seat 1 and the valve core 2, the valve core seat 1 is provided with a valve core hole 11, the valve core 2 is arranged in the valve core hole 11, and the vertical depth L of the valve core hole 阀芯孔 Less than the vertical length L of the valve core 阀芯 ;

[0032] The maximum width of the transverse cross section of the valve core 2 is located between the end surface 111 and the bottom end surface 112 of the valve core hole 11, and the transverse cross section width W of the end surface of the valve core hole 11 is 端口面 Smaller than the maximum width W of the transverse section of the valve core 2 阀芯max .

[0033] Since the vertical depth of the valve core hole is smaller than the vertical length of the valve core, therefore, when the valve core is assembled to the valve core hole, part of the valve core must be exposed outside the valve core hole, and when it is used to seal the exhaust port of the pressure cooker, it is ensured that part of the valve core can contact the exhaust port; since the maximum width part of the transverse cross-section of the valve core is located between the port surface and the bottom end surface of the valve core hole, and the transverse cross-section width of the port surface of the valve core hole is smaller than the maximum width of the transverse cross-section of the valve core, therefore, when the valve core is assembled to the valve core hole, it is ensured that the maximum width part of the transverse cross-section of the valve core is encapsulated in the valve core hole by the port surface of the valve core hole whose transverse cross-section width is smaller than it, so that the valve core is more stable after being assembled to the valve core hole, and is not easy to fall off.

[0034] Embodiment 2

[0035] See also Figure 1-2On the basis of the first embodiment, this embodiment provides a valve core assembly, the valve core 2 selects a spherical valve core, such as a ceramic ball, a glass ball, a plastic ball, a steel ball and other standard balls, without any limitation here, in other embodiments, the valve core can also be a quasi-spherical valve core, an elliptical valve core and other valve cores with curved surfaces. When the valve core assembly is assembled to the pressure cooker for sealing the exhaust port of the exhaust pipe, due to the compensation effect of the spherical surface of the spherical valve core, the processing requirements of the exhaust pipe and the risk of leakage of the closed structure of the pressure limiting valve caused by the unevenness of the stove are greatly reduced.

[0036] In order to further ensure that the valve core is stable and not easy to fall off after being installed in the valve core seat, and to ensure that the valve core can leave space for contact with the exhaust port of the exhaust pipe after being installed in the valve core seat, the valve core assembly provided in this embodiment has a diameter d of the spherical valve core 阀芯 The vertical depth L of the valve core hole 12 阀芯 The hole relationship is as follows: 1 / 2d 阀芯 <L 阀芯孔 <2 / 3d 阀芯 For example, if the diameter of the spherical valve core is 8mm, the depth of the valve core hole can be selected as 4.05mm, 4.5mm, 5mm, or 5.3mm. This ensures that the maximum width portion of the transverse section of the spherical valve core (the portion where the diameter is located) is encapsulated within the port surface of the valve core hole. Since the maximum width portion of the transverse section of the spherical valve core (the portion where the diameter is located) is encapsulated within the port surface of the valve core hole, the spherical valve core is more stable after being assembled with the valve core seat, the spherical valve core is not easy to fall off from the valve core hole, and 1 / 3 of the spherical valve core is exposed outside the valve core hole. After the valve core assembly is assembled with the pressure cooker, the sealed contact space between the spherical valve core and the exhaust port of the exhaust pipe is better ensured.

[0037] Embodiment 3

[0038] See also Figure 1-2 Based on the second embodiment, this embodiment provides a valve core assembly, wherein the width of the transverse section of the valve core hole gradually decreases from the position corresponding to the surface where the diameter of the spherical valve core is located to the port surface, and the maximum width of the transverse section of the valve core hole is greater than the diameter d of the spherical valve core. 阀芯For example, if the diameter of the spherical valve core is 1mm, the maximum width of the transverse section of the valve core hole is 1.05mm; if the diameter of the spherical valve core is 2mm, the maximum width of the transverse section of the valve core hole is 2.1mm; if the diameter of the spherical valve core is 5.2mm, the maximum width of the transverse section of the valve core hole is 5.5mm; if the diameter of the spherical valve core is 8mm, the maximum width of the transverse section of the valve core hole is 8.08mm; if the diameter of the spherical valve core is 10mm, the maximum width of the transverse section of the valve core hole is 10.05mm; etc. Since the valve core assembly is finally assembled into the pressure limiting valve of the pressure cooker, and the cavity space of the pressure limiting valve is limited, the diameter of the spherical valve core should not be too large. An oversized spherical valve core will inevitably lead to an oversized valve core seat, so that the oversized valve core assembly cannot be installed in the pressure limiting valve cavity of the pressure cooker.

[0039] The maximum width of the transverse section of the valve core hole is greater than the diameter d of the spherical valve core. 阀芯 In order to facilitate the assembly of the valve core and the valve core seat, the valve core hole before assembly is a cylindrical hole, that is, the transverse cross-sectional width W of the bottom end face of the valve core hole is 底端面 The width of the transverse section from the port surface to the port surface is the same. Since the width of the transverse section is greater than the diameter of the spherical valve core, the spherical valve core can be easily placed in the valve core hole. After the spherical valve core is placed in the valve core hole, it is riveted with strong force to reduce the width of the transverse section of the port surface of the valve core hole and make it smaller than the diameter of the spherical valve core, so that the spherical valve core can be firmly installed in the valve core hole and is not easy to fall off. During strong riveting, the transverse section width of the valve core hole from the position corresponding to the surface where the diameter of the spherical valve core is located to the port surface gradually decreases because the cross-sectional width of the spherical valve core from the surface where the diameter is located to the two ends also gradually decreases, which is conducive to maintaining a uniform gap between the valve core hole and the spherical valve core, so that the spherical valve core will not be damaged due to excessive riveting, nor will it be unstable due to excessive gap between the two.

[0040] In other specific embodiments, in order to facilitate the assembly of the valve core and the valve core seat, the maximum width of the transverse cross section of the valve core hole can also be equal to the diameter d of the spherical valve core. 阀芯 For example, the diameter of the spherical valve core is 1.08 mm, the maximum width of the transverse section of the valve core hole is 1.08 mm, the maximum width of the transverse section of the valve core hole is 7.08 mm, and the diameter of the spherical valve core is 7.08 mm; etc. The principle of this arrangement and the maximum width of the transverse section of the valve core hole is greater than the diameter d of the spherical valve core 阀芯 It is similar, that is: since the width of its transverse section is equal to the diameter of the spherical valve core, it is convenient for the spherical valve core to be placed in the valve core hole, which will not be described in detail here.

[0041] It is foreseeable that if the maximum width of the transverse cross section of the valve core hole is smaller than the diameter d of the spherical valve core 阀芯, it is also possible to install the valve core into the valve core hole, but strong squeezing may be required, which may cause the valve core or the valve core hole to be damaged or severely deformed, thereby affecting the function of the valve core assembly.

[0042] Embodiment 4

[0043] See also Figures 3 to 5 This embodiment provides a pressure cooker, comprising a pot body (not shown in the figure), a pot cover 3, an exhaust pipe 4 and a pressure limiting valve 5. The pot cover 3 is used to open and close the pot body. Any valve core assembly described in embodiments 1 to 3 is applied to the pressure cooker to form a seal on the exhaust pipe. Specifically:

[0044] The valve core seat 1 is arranged in the internal cavity of the pressure limiting valve 5, the exhaust pipe 4 passes through the pot cover 3 and is fixed to the pot cover, the exhaust pipe 4 connects the inside and outside of the pot body, and a part of the valve core 2 is in close contact with the exhaust port 41 of the exhaust pipe 4 to form a seal for the exhaust port.

[0045] After the valve core and the valve core seat are assembled, the valve core can not only be firmly fixed in the valve core hole, but also retains enough space for close contact with the exhaust port. The valve core can cover the entire exhaust port, thereby avoiding the problem of air leakage caused by poor sealing of the exhaust port.

[0046] In a more specific implementation, Figure 4 As shown, a chamfer is formed at the exhaust port 41 of the exhaust pipe 4, and a part of the valve core 2 is in close contact with the chamfer to form a seal for the exhaust port. The chamfer is set so that the position of the exhaust port is slightly lower than the position of the chamfer. The valve core is not only in close contact with the exhaust port, but also in close contact with the chamfer, which increases the sealing contact area and makes the sealing effect better. In addition, the chamfered exhaust pipe will be affected by the ball when the gas is discharged from the chamfer, which will lengthen the pressure range from the beginning of exhaust to the stabilization of the gas pressure. For pressure cookers without safety valves, the pressure limiting valve can be used as a safety valve.

[0047] In another more specific embodiment, Figure 5 As shown, a fillet is formed at the exhaust port of the exhaust pipe 4, and a part of the valve core 2 is in close contact with the fillet to form a seal for the exhaust port. With the setting of the fillet, although the exhaust port and the fillet are in a level position, when the valve core is a spherical valve core, the contact between the arc surface of the valve core and the arc surface of the fillet will increase the contact area, thereby making the sealing effect better. Moreover, when the gas is discharged from the fillet, it is affected by the ball, and the pressure interval from the beginning of exhaust to the stabilization of the air pressure is short. In this way, for a pressure cooker with a safety valve, the working pressure from the beginning of exhaust to the stabilization of the pressure for 30 seconds can be fully met.

[0048] If the exhaust pipe has a sharp corner at the exhaust port, there will be burrs no matter how it is processed, and the burrs will cause leakage. However, whether the exhaust pipe has a chamfer or a rounded corner, compared to a sharp corner, there will be no leakage due to the presence of burrs, and it can play a better sealing role.

[0049] Although a number of specific embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are merely exemplary and cannot be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by a person of ordinary skill in the art are within the scope of protection claimed by the present invention.

Claims

1. A valve core assembly, comprising a valve core seat and a valve core, wherein the valve core seat is provided with a valve core hole, and the valve core is arranged in the valve core hole, characterized in that: The vertical depth L of the valve core hole 阀芯孔 Less than the vertical length L of the valve core 阀芯 ; The maximum width of the transverse cross section of the valve core is located between the end surface and the bottom end surface of the valve core hole, and the width W of the transverse cross section of the end surface of the valve core hole is 端口面 Smaller than the maximum width W of the transverse cross section of the valve core 阀芯max .

2. The valve core assembly according to claim 1, characterized in that: The valve core is a spherical valve core.

3. The valve core assembly according to claim 2, characterized in that: The diameter d of the spherical valve core 阀芯 The vertical depth L of the valve core hole 阀芯孔 The relationship is as follows: 1 / 2d 阀芯 <L 阀芯孔 <2 / 3d 阀芯 .

4. The valve core assembly according to any one of claims 2 or 3, characterized in that: The transverse cross-sectional width of the valve core hole gradually decreases from the position corresponding to the surface where the diameter of the spherical valve core is located to the port surface, and the transverse maximum cross-sectional width of the valve core hole is greater than or equal to the diameter d of the spherical valve core. 阀芯 .

5. The valve core assembly according to claim 4, characterized in that: The maximum cross-sectional width of the valve core hole is: 1.05mm≤W 底端面 ≤10.05mm; the diameter d of the spherical valve core 阀芯 The size is: 1mm≤d 阀芯 ≤10mm.

6. The valve core assembly according to claim 5, characterized in that: The diameter d of the spherical valve core 阀芯 The size is: 2mm≤d 阀芯 ≤8mm.

7. A pressure cooker, comprising a cooker body, a cooker cover, an exhaust pipe and a pressure limiting valve, wherein the cooker cover is used to open and close the cooker body, characterized in that: Also includes a valve core assembly as claimed in any of the preceding claims; The valve core seat is arranged in the inner cavity of the pressure limiting valve; The exhaust pipe passes through the pot cover and is fixed to the pot cover, and the exhaust pipe is connected to the inside and outside of the pot body; A portion of the valve core is in close contact with the exhaust port of the exhaust pipe to form a seal for the exhaust port.

8. The pressure cooker according to claim 7, characterized in that A chamfer is formed at the exhaust port of the exhaust pipe, and a portion of the valve core is in close contact with the chamfer to form a seal for the exhaust port.

9. The pressure cooker according to claim 7, characterized in that A rounded corner is formed at the exhaust port of the exhaust pipe, and a portion of the valve core is in close contact with the rounded corner to form a seal for the exhaust port.

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