CN215555830U - Pressure limiting structure of vacuum rice bucket - Google Patents
Pressure limiting structure of vacuum rice bucket Download PDFInfo
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- CN215555830U CN215555830U CN202121722003.8U CN202121722003U CN215555830U CN 215555830 U CN215555830 U CN 215555830U CN 202121722003 U CN202121722003 U CN 202121722003U CN 215555830 U CN215555830 U CN 215555830U
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- cover panel
- bucket cover
- limiting structure
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Abstract
The utility model discloses a pressure limiting structure of a vacuum rice bucket, which comprises a bucket cover main body and a vacuumizing device, wherein the bucket cover main body comprises a bucket cover panel, a through hole is formed in the bucket cover panel, an elastic rubber piece for sealing the through hole is arranged at the through hole, a normally closed switch capable of controlling the vacuumizing device to be started and stopped is arranged on the inner side of the bucket cover panel, the elastic rubber piece generates elastic deformation when the air pressure on the outer side of the bucket cover panel is greater than the air pressure on the inner side of the bucket cover panel, and the vacuumizing device is stopped when the deformation part of the elastic rubber piece triggers the normally closed switch. Compared with the scheme of realizing closed-loop control by adopting a sensor, the utility model has the advantages of lower cost, no external electromagnetic signal interference on the elastic rubber piece and low use failure rate.
Description
Technical Field
The utility model relates to the technical field of vacuum rice buckets, in particular to a pressure limiting structure of a vacuum rice bucket.
Background
The rice bucket is an appliance used by many families, especially in rural areas, and is used by almost every family. The rice bucket is mainly used for storing staple foods such as rice, flour and the like, and the southern regions generally have humid and warm weather, so that the stored rice after long-term use is easy to be affected with damp and deteriorated in summer, and the human health can be seriously harmed when the rice affected with damp and deteriorated is eaten.
In order to avoid the rice from being affected with damp and going bad, the vacuum rice barrel which can vacuumize the interior of the rice barrel can be transported to produce. The vacuum rice bucket comprises three parts, namely a bucket body, a bucket cover and a vacuumizing device, wherein a sealing ring is arranged between the bucket body and the bucket cover, after the bucket cover is tightly covered on the bucket body, sealing is formed between the bucket cover and the bucket body, the vacuumizing device is opened to vacuumize the interior of the bucket cover, the rice can be effectively prevented from being affected with damp and deteriorating, and the storage time of the rice is prolonged.
In the prior art, when the vacuumizing device vacuumizes the vacuum rice, the pressure change in the vacuum rice bucket is detected through the sensor, when the vacuum degree in the vacuum rice bucket is higher than the upper limit of a set value, the vacuumizing device can be stopped, so that the vacuum degree in the vacuum rice bucket is slowly reduced, and when the vacuum degree in the vacuum rice bucket is lower than the set value, the vacuumizing device is started again, so that the vacuum degree in the vacuum rice bucket is improved, and the closed-loop control is realized. However, the sensor is used for detecting the change of the vacuum degree in the vacuum rice bucket, the cost is high, and the sensor is easy to break down after being used for a long time.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a pressure limiting structure for a vacuum rice bucket, which has low cost and low failure rate.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
a pressure limiting structure of a vacuum rice bucket comprises a bucket cover main body and a vacuumizing device, wherein the bucket cover main body comprises a bucket cover panel, a through hole is formed in the bucket cover panel, an elastic rubber piece for sealing the through hole is arranged at the through hole, a normally closed switch capable of controlling the vacuumizing device to be started and stopped is arranged on the inner side of the bucket cover panel, the elastic rubber piece generates elastic deformation when the air pressure on the outer side of the bucket cover panel is larger than the air pressure on the inner side of the bucket cover panel, and the vacuumizing device is stopped when a deformation part of the elastic rubber piece touches the normally closed switch.
Preferably, the barrel cover main body further comprises an inner lining plate fixed on the inner side of the barrel cover panel.
Preferably, the normally closed switch is a travel switch arranged between the inner lining plate and the cover panel.
Preferably, the vacuumizing device comprises a vacuum pump arranged between the lining plate and the barrel cover panel, the air inlet end of the vacuum pump is connected with a one-way valve, the barrel cover panel is provided with an air outlet, and the air outlet end of the vacuum pump is communicated with the air outlet through an air pipe.
Preferably, a PCB is arranged between the lining plate and the panel of the barrel cover, a control unit is arranged on the PCB, and the normally closed switch and the vacuum pump are connected with the control unit.
Preferably, a cylindrical mounting seat is arranged on the barrel cover panel, and the lower end of the mounting seat is opened and forms the through hole.
Preferably, the elastic rubber part comprises an annular rubber part base body and a deformation sheet integrally formed on the inner side of the rubber part base body, a downward convex pressing part is arranged in the middle of the deformation sheet, and a bending part which is located around the pressing part and bulges upwards is further arranged on the deformation sheet.
Preferably, the upper end of the rubber part base body is provided with an upper edge which is turned outwards, the lower surface of the upper edge is provided with an annular clamping groove, and the upper end part of the mounting seat is clamped into the annular clamping groove so as to fix the rubber part base body.
Preferably, the lower end of the rubber member base body is provided with a lower edge which is turned outwards, and the lower edge is abutted against the lower end face of the mounting seat to limit the elastic rubber member from being separated from the mounting seat.
The utility model has the beneficial effects that: when the air pressure in the vacuum rice bucket is a first set value, the deformation of the elastic rubber piece is enough to touch the normally closed switch, the vacuumizing device is stopped at the moment, the vacuum degree in the vacuum rice bucket is slowly reduced, the difference value between the air pressure in the vacuum rice bucket and the atmospheric pressure is gradually reduced, the deformation of the elastic rubber piece is also gradually reduced in the process, when the deformation part of the elastic rubber piece is separated from the normally closed switch, the vacuumizing device is started again, the vacuum degree in the vacuum rice bucket is improved, closed-loop control is realized, and the vacuum degree in the vacuum rice bucket is always kept in a proper range. Compared with the scheme of realizing closed-loop control by adopting a sensor, the utility model has the advantages of lower cost, no external electromagnetic signal interference on the elastic rubber piece and low use failure rate.
Drawings
FIG. 1 is a cross-sectional view of a vacuum rice bucket;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a cross-sectional view of the elastomeric member;
fig. 4 is an exploded view of the tub cover body.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "preferred", "less preferred", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "preferred" or "less preferred" may explicitly or implicitly include at least one such feature.
Referring to fig. 1 to 4, a vacuum rice bucket comprises a bucket body 6, a bucket cover main body 1 and a vacuumizing device 2, wherein the bucket cover main body 1 and the vacuumizing device 2 form a pressure limiting structure of the vacuum rice bucket.
The barrel cover main body 1 comprises a barrel cover panel 11 for separating an external space and an internal space of the vacuum rice barrel, a through hole 101 is formed in the barrel cover panel 11, an elastic rubber part 3 for sealing the through hole 101 is arranged at the through hole 101, a normally closed switch 4 capable of controlling the vacuumizing device 2 to be started and stopped is arranged on the inner side of the barrel cover panel 11, the elastic rubber part 3 generates elastic deformation when the air pressure on the outer side of the barrel cover panel 11 is larger than the air pressure on the inner side of the barrel cover panel 11, and the vacuumizing device 2 is stopped when the deformation part of the elastic rubber part 3 touches the normally closed switch 4.
Taking an elastic rubber member 3 of one type as an example, the working principle of the pressure limiting structure is as follows: when the air pressure in the vacuum rice bucket is 30KPa lower than the atmospheric pressure, the deformation of the elastic rubber piece 3 is enough to touch the normally closed switch 4, at the moment, the vacuumizing device 2 is stopped, the vacuum degree in the vacuum rice bucket is slowly reduced, the difference value between the air pressure in the vacuum rice bucket and the atmospheric pressure is gradually reduced, the deformation of the elastic rubber piece 3 is also gradually reduced in the process, when the deformation part of the elastic rubber piece 3 is separated from the normally closed switch 4, the vacuumizing device 2 is started again, the vacuum degree in the vacuum rice bucket is improved, closed-loop control is realized, and the air pressure in the vacuum rice bucket is always kept about 30KPa lower than the atmospheric pressure. Compared with the scheme of realizing closed-loop control by adopting a sensor, the utility model has lower cost, the elastic rubber piece 3 is not interfered by external electromagnetic signals, and the use failure rate is low.
Further, the barrel cover main body 1 further comprises an inner lining plate 12 fixed on the inner side of the barrel cover panel 11, and a space between the barrel cover panel 11 and the inner lining plate 12 is communicated with a space in the barrel body.
In a preferred embodiment of the present invention, the normally closed switch 4 is a travel switch disposed between the inner liner 12 and the lid panel 11.
In some embodiments of the present invention, the normally closed switch 4 may also be a pressure relay, a photoelectric sensing switch, or the like.
Referring to fig. 1 and 4, the vacuum pumping device 2 includes a vacuum pump 21 disposed between the inner liner 12 and the lid panel 11, an air inlet end of the vacuum pump 21 is connected to a one-way valve 22, an air outlet is disposed on the lid panel 11, and an air outlet end of the vacuum pump 21 is communicated with the air outlet through an air pipe.
Generally, a PCB 5 is disposed between the inner lining 12 and the lid panel 11, a control unit is disposed on the PCB 5, and the normally closed switch 4 and the vacuum pump 21 are both connected to the control unit. The control unit controls the starting and stopping of the vacuum pump 21 according to the signal given by the normally closed switch 4.
Referring to fig. 2 and 3, a cylindrical mounting seat 102 is provided on the tub cover panel 11, and a through hole 101 is formed at a lower end of the mounting seat 102.
The elastic rubber part 3 comprises an annular rubber part base body 31 and a deformation sheet 32 integrally formed on the inner side of the rubber part base body 31, wherein the middle part of the deformation sheet 32 is provided with a pressing part 321 protruding downwards, and the deformation sheet 32 is also provided with a bending part 322 which is positioned around the pressing part 321 and bulges upwards. The upper end of the rubber part base body 31 is provided with an upper edge 311 which is turned outwards, the lower surface of the upper edge 311 is provided with an annular clamping groove 312, the upper end of the mounting seat 102 is clamped into the annular clamping groove 312 to fix the rubber part base body 31, and the outer side wall of the rubber part base body 31 is in interference fit with the inner side wall of the through hole 101. By adopting the design, the rubber part base body 31 is clamped into the through hole 101, the upper end part of the mounting seat 102 is clamped into the annular clamping groove 312, the rubber part base body 31 can be mounted and fixed conveniently and quickly, and the elastic rubber part 3 can be prevented from being separated from the mounting seat 102 downwards due to the existence of the upper edge 311.
Furthermore, the lower end of the rubber base 31 is provided with a lower edge 313 which is turned outwards, and the lower edge 313 abuts against the lower end surface of the mounting seat 102, so that the elastic rubber 3 can be prevented from being separated from the mounting seat 102 upwards.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical scope of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are intended to be included in the scope of the present invention.
Claims (9)
1. The pressure limiting structure of the vacuum rice bucket comprises a bucket cover main body (1) and a vacuumizing device (2), and is characterized in that the bucket cover main body (1) comprises a bucket cover panel (11), a through hole (101) is formed in the bucket cover panel (11), an elastic rubber piece (3) for sealing the through hole (101) is arranged at the through hole (101), a normally closed switch (4) capable of controlling the vacuumizing device (2) to be started and stopped is arranged on the inner side of the bucket cover panel (11), the elastic rubber piece (3) is elastically deformed when the air pressure on the outer side of the bucket cover panel (11) is larger than the air pressure on the inner side of the bucket cover panel (11), and the vacuumizing device (2) is stopped when a deformation part of the elastic rubber piece (3) triggers the normally closed switch (4).
2. The pressure limiting structure of the vacuum rice bucket according to claim 1, wherein the bucket lid body (1) further comprises an inner lining plate (12) fixed on the inner side of the bucket lid panel (11).
3. The pressure limiting structure of the vacuum rice bucket according to claim 2, wherein the normally closed switch (4) is a travel switch arranged between the inner lining plate (12) and the bucket cover panel (11).
4. The pressure limiting structure of the vacuum rice bucket according to claim 2, wherein the vacuumizing device (2) comprises a vacuum pump (21) arranged between the inner lining plate (12) and the bucket cover panel (11), the air inlet end of the vacuum pump (21) is connected with a one-way valve (22), the bucket cover panel (11) is provided with an air outlet, and the air outlet end of the vacuum pump (21) is communicated with the air outlet through an air pipe.
5. The pressure limiting structure of the vacuum rice bucket according to claim 4, wherein a PCB (5) is arranged between the inner lining plate (12) and the bucket cover panel (11), a control unit is arranged on the PCB (5), and the normally closed switch (4) and the vacuum pump (21) are connected with the control unit.
6. The pressure limiting structure of the vacuum rice bucket according to claim 1, wherein the bucket cover panel (11) is provided with a cylindrical mounting seat (102), and the lower end of the mounting seat (102) is opened and forms the through hole (101).
7. The pressure limiting structure of the vacuum rice bucket according to claim 6, wherein the elastic rubber (3) comprises an annular rubber base body (31) and a deformation sheet (32) integrally formed on the inner side of the rubber base body (31), the middle part of the deformation sheet (32) is provided with a pressing part (321) protruding downwards, and the deformation sheet (32) is further provided with a bending part (322) located around the pressing part (321) and bulging upwards.
8. The pressure limiting structure of the vacuum rice bucket according to claim 7, wherein an upper edge (311) which is turned outwards is arranged at the upper end of the rubber base body (31), an annular clamping groove (312) is arranged on the lower surface of the upper edge (311), and the upper end of the mounting seat (102) is clamped into the annular clamping groove (312) to fix the rubber base body (31).
9. The pressure limiting structure of the vacuum rice bucket according to claim 8, wherein a lower edge (313) which is folded outwards is arranged at the lower end of the rubber base body (31), and the lower edge (313) is abutted against the lower end surface of the mounting seat (102) to limit the elastic rubber (3) from being separated from the mounting seat (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121722003.8U CN215555830U (en) | 2021-07-27 | 2021-07-27 | Pressure limiting structure of vacuum rice bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121722003.8U CN215555830U (en) | 2021-07-27 | 2021-07-27 | Pressure limiting structure of vacuum rice bucket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215555830U true CN215555830U (en) | 2022-01-18 |
Family
ID=79828999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121722003.8U Active CN215555830U (en) | 2021-07-27 | 2021-07-27 | Pressure limiting structure of vacuum rice bucket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215555830U (en) |
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2021
- 2021-07-27 CN CN202121722003.8U patent/CN215555830U/en active Active
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