Device for detecting air tightness of vacuum layer of heat preservation vessel

Abstract

The utility model discloses an air tightness detection device for a vacuum layer of a heat preservation vessel, and the device comprises a sealing part which is used for plugging an opening of the heat preservation vessel, and enabling the interior of the heat preservation vessel to form a sealed cavity; the heating part covers or is close to the outer surface of the heat preservation vessel and is used for heating; and the air pressure detection element is mounted on the sealing part or at least one part of the air pressure detection element extends into the sealing cavity of the heat preservation vessel and is used for detecting and displaying the pressure change of the sealing cavity before and after the heat preservation vessel is heated. If the vacuum layer is poor in air tightness (such as breakage and air leakage), after the heat preservation vessel is heated, air in the inner sealed cavity is prone to thermal expansion, and the air pressure data variable of the air pressure detection element is large; if the air tightness of the vacuum layer is good, after the heat preservation vessel is heated, the temperature rise of the air in the internal sealed cavity is small, and the air pressure data of the air pressure detection element hardly changes or has small variable. Whether the air tightness of the vacuum layer is qualified can be judged through the change degree of the air pressure data.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal insulation vessel quality detection, in particular to a thermal insulation vessel vacuum layer air tightness detection device. BACKGROUND

[0002] Most thermal insulation vessels (such as thermal insulation cups, thermal insulation pots, etc.) are insulated from hot water and the outside world by a vacuum layer to reduce heat loss and achieve thermal insulation. Therefore, the sealing property of the vacuum layer is an important factor determining the thermal insulation effect.

[0003] Before the thermal insulation vessels are shipped, the vacuum layer air tightness is often detected. The existing detection methods are as follows: method one, heating the inside of the thermal insulation vessel, such as filling hot air, a heating rod, etc., and after a certain time interval, such as one minute, the outside surface is held with water to perceive. This method is low in efficiency, cannot be automated, has a large error (affected by manual judgment), and the detection result is not objective; method two, heating the outside of the thermal insulation vessel, and performing spectral analysis on the inside by a thermal imager. This method cannot be applied to different inner walls (such as smooth surfaces and frosted surfaces which will affect the structure), and the detection result is not intuitive, and the operator is required to have a high level of professional training. Specifically, for ordinary workers, spectral analysis and instrument operation are difficult. SUMMARY

[0004] Based on this, the present application provides a thermal insulation vessel vacuum layer air tightness detection device to solve the problems in the prior art.

[0005] The technical solution adopted by the present application to solve the technical problems is: a thermal insulation vessel vacuum layer air tightness detection device, comprising:

[0006] a sealing part for plugging the opening of the thermal insulation vessel to form a sealed cavity inside the thermal insulation vessel;

[0007] a heating part covering or close to the outer surface of the thermal insulation vessel and heating;

[0008] a gas pressure detection element installed on the sealing part or at least partially inserted into the sealed cavity of the thermal insulation vessel for detecting and displaying the pressure change of the sealed cavity before and after heating of the thermal insulation vessel.

[0009] Specifically, if the vacuum layer air tightness is poor (broken, air leakage, etc.), the air in the internal sealed cavity of the thermal insulation vessel is easy to expand after heating, and the gas pressure data of the gas pressure detection element has a large variable; if the vacuum layer air tightness is good, the air in the internal sealed cavity of the thermal insulation vessel has a small temperature rise after heating, and the gas pressure data of the gas pressure detection element has little or small change. The degree of change of the gas pressure data can be used to judge whether the vacuum layer air tightness is qualified.

[0010] In some embodiments, the sealing part comprises a metal pressing plate and a sealing gasket attached to the metal pressing plate, and the outer surface of the metal pressing plate is subjected to a pressing force to make the sealing gasket contact and seal with the opening of the heat preservation vessel.

[0011] In some embodiments, a pressing mechanism is further included for applying the pressing force to the metal pressing plate.

[0012] In some embodiments, the sealing part is a sealing cover screwed with the heat preservation vessel.

[0013] In some embodiments, the air pressure detecting element is a pressure gauge, and the joint of the pressure gauge is installed on the sealing part and used to extend into the sealed cavity of the heat preservation vessel.

[0014] In some embodiments, the air pressure detecting element is a pressure sensor, and a data receiving module is further included for connecting the pressure sensor by wire or wirelessly to provide data receiving and reading.

[0015] In some embodiments, a temperature detecting element is further included, which is a temperature sensor or a thermometer, installed on the sealing part and used to extend into the sealed cavity of the heat preservation vessel to detect the temperature.

[0016] In some embodiments, the heating part covers or approaches the outer surface of the lower half of the heat preservation vessel.

[0017] In some embodiments, the heating part is a high-temperature gas source output end approaching the outer surface of the heat preservation vessel.

[0018] In some embodiments, the heating part is a flexible heating sheet covering the outer surface of the heat preservation vessel.

[0019] The application has the advantages of sealing the heat preservation vessel and then warming it, determining the air tightness of the vacuum layer by detecting the change of the internal pressure value, being simpler in structure and easier to operate compared with the traditional way, realizing automation and batch detection in the detection process, being accurate and easy to read in the detection conclusion, and being applicable to heat preservation vessels of various shapes, materials and processes. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings and embodiments.

[0021] Figure 1 is a structure schematic diagram of one embodiment of the application.

[0022] Figure 2 is a structure schematic diagram of another embodiment of the application.

[0023] Figure 3 is a structure schematic diagram of another embodiment of the application.

[0024] Reference signs: a. heat preservation vessel, a1. vacuum layer, a2. sealed cavity, 1. sealing part, 11. metal pressing plate, 12. sealing gasket, 2. heating part, 3. air pressure detecting element, 4. temperature detecting element. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on that a person of ordinary skill in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0026] Please refer to Figures 1-3 The specific embodiment of the present application is shown in the drawings: a heat preservation vessel vacuum layer air tightness detection device, comprising: a sealing part 1, for plugging the opening of the heat preservation vessel a, so that the internal sealed cavity a2 of the heat preservation vessel a is formed; a heating part 2, covering or approaching the outer surface of the heat preservation vessel a and heating; an air pressure detecting element 3, installed on the sealing part 1 or at least part of it extends into the sealed cavity a2 of the heat preservation vessel a, for detecting and displaying the pressure change of the sealed cavity a2 of the heat preservation vessel a before and after heating.

[0027] Specifically, if the vacuum layer a1 is not air tight (broken, air leakage, etc.), after the heat preservation vessel a is heated, the air in the internal sealed cavity a2 is easy to expand by heat, and the air pressure data of the air pressure detecting element 3 has a large variable; if the vacuum layer a1 is air tight, after the heat preservation vessel a is heated, the air in the internal sealed cavity a2 has a small temperature rise, and the air pressure data of the air pressure detecting element 3 has little change or a small variable. The change degree of the air pressure data can be used to judge whether the air tightness of the vacuum layer a1 is qualified.

[0028] Some preferred / improved embodiments based on the above embodiments will be described below. The following embodiments can be selected or combined.

[0029] Regarding the sealing part, its function requires that it can seal the mouth of the heat preservation vessel a. As one of the embodiments of the sealing part, please refer to Figure 1 and 2As shown, the sealing part 1 includes a metal pressure plate 11 and a sealing gasket 12 that is attached to it. The outer surface of the metal pressure plate 11 is subjected to a pressing force so that the sealing gasket 12 contacts the opening of the heat preservation container a and keeps it sealed.

[0030] Based on the structure of the sealing part described above, a clamping mechanism is also included, which is used to apply a clamping force to the metal pressure plate 11. The clamping mechanism can be implemented in various ways. In batch automated inspection devices, linear motion pneumatic or electric clamping blocks, or rotary motion clamping claws, can be used to clamp the metal pressure plate 11.

[0031] Another embodiment of the sealing part: See reference Figure 3 As shown, the sealing part 1 is a sealing cap that is threadedly connected to the insulated container a. Ensuring a tight seal between the threads is sufficient.

[0032] Regarding the air pressure sensing element, as one embodiment: Refer to Figure 1 and 2 As shown, the pressure detection element 3 is a pressure gauge, and the connector of the pressure gauge is installed on the sealing part 1 and is used to extend into the sealed cavity a2 of the insulated container a. This pressure gauge can be mechanical or electronic and can be read visually.

[0033] Regarding the air pressure sensing element, as another embodiment: Refer to Figure 3 As shown, the air pressure detection element 3 is a pressure sensor and also includes a data receiving module, which connects to the pressure sensor via wired or wireless means to receive and read data. In some cases, a database and data analysis software can be established to match the temperature and internal pressure comparison curve of the insulated container a based on the thermal expansion coefficient of air, thereby simplifying the detection conclusion, such as directly displaying "qualified" or "unqualified". For wireless methods, the working principle of the tire pressure sensor can be referenced, converting the detected data into an electrical signal and transmitting it to the data receiving module via an RF radio frequency transmitter chip.

[0034] In some embodiments, refer to Figure 1 and 2 As shown, it also includes a temperature detection element 4, which is a temperature sensor or thermometer, installed on the sealing part 1 and used to extend into the sealed cavity of the insulated container to detect the temperature. This arrangement allows temperature changes to also be used as a reference value, further improving the accuracy of the detection results.

[0035] Meanwhile, when one part of the pressure sensing element 3 and the temperature sensing element 4 extends into the interior of the insulated container a through the sealing part 1, the sealing performance between the pressure sensing element 3 and the sealing part 1 is also crucial. In this case, it is necessary to seal the gap between the two, for example, by using a sealing ring, sealing gasket 12 or other sealing structures.

[0036] In some embodiments, the heating element 2 covers or approaches the lower half of the outer surface of the insulated container a. Here, "lower half of the insulated container a" refers to the lower half of the insulated container a itself, not a specific orientation. For example, in some cases, the insulated container a may have its opening facing upwards, its bottom facing upwards, or it may be placed horizontally. In this embodiment, placing the heating element 2 relative to the lower half of the insulated container a allows the heating element 2 to be as far away as possible from the pressure sensing element 3 and the temperature sensing element 4, avoiding inaccurate detection results due to excessive proximity.

[0037] Regarding the specific selection of the heating element, as one approach: refer to... Figure 2 As shown, the heating part 2 is a high-temperature gas source output end close to the outer surface of the heat-insulating container a. An external high-temperature gas source can be connected to heat it. Preferably, a guide cover can be fitted over the outside of the heat-insulating container a for heat collection.

[0038] As another way, refer to Figure 1 and 3 As shown, the heating element 2 is a flexible heating element covering the outer surface of the insulated container a. Examples include graphene heating elements and electric heating elements.

[0039] Both of these methods can achieve rapid heating of the outer surface of the insulated container a while minimizing damage to the outer surface and thus not affecting the product's surface quality.

[0040] In addition, the heating element 2 can also be hot water placed in a container, which can also achieve the heating effect. However, this method requires wiping or drying before packaging, which adds an extra step. Therefore, it is not the preferred solution in actual testing.

[0041] Regarding the specific working process of the technical solution of this application: Place and fix the heat preservation container a, seal its mouth through the sealing part 1, heat the lower half of its outer surface, and maintain it within a certain range, for example, the temperature is controlled at 50-150℃ and the time is controlled at 0.5-2min. During this process, observe the change of air pressure value measured by the air pressure detection element 3. If the air pressure value remains unchanged or the change is small (different variable curves are matched according to different volumes, and a control group can be preset in advance), it can be determined that the air tightness of the vacuum layer of the heat preservation container meets the standard. If the air pressure value changes significantly, it can be determined that the air tightness of the vacuum layer of the heat preservation container does not meet the standard.

[0042] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and the foregoing embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not drive the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting the airtightness of the vacuum layer of a thermal insulation container, characterized in that, include: The sealing part is used to seal the opening of the insulated container, so that a sealed cavity is formed inside the insulated container; The heating element covers or approaches the outer surface of the insulated container and heats it. A pressure sensing element is installed on the sealing part or at least partially inserted into the sealed cavity of the insulated container to detect and display the pressure change in the sealed cavity before and after heating of the insulated container.

2. The device for detecting the airtightness of the vacuum layer of a thermal insulation container according to claim 1, characterized in that, The sealing part includes a metal pressure plate and a sealing gasket that is attached to it. The outer surface of the metal pressure plate is subjected to a pressing force to make the sealing gasket contact the opening of the insulated container and keep it sealed.

3. The airtightness testing device for the vacuum layer of a thermal insulation container according to claim 2, characterized in that, It also includes a clamping mechanism for applying a clamping force to the metal pressure plate.

4. The airtightness testing device for the vacuum layer of insulated containers according to claim 1, characterized in that, The sealing part is a sealing cap that is threadedly connected to the insulated container.

5. The device for detecting the airtightness of the vacuum layer of a thermal insulation container according to claim 1, characterized in that, The pressure detection element is a pressure gauge, and the connector of the pressure gauge is installed on the sealing part and is used to extend into the sealed cavity of the insulated container.

6. The device for detecting the airtightness of the vacuum layer of a thermal insulation container according to claim 1, characterized in that, The air pressure detection element is a pressure sensor, and it also includes a data receiving module, which is connected to the pressure sensor via wired or wireless means to provide data reception and reading.

7. The airtightness testing device for the vacuum layer of a thermal insulation container according to claim 1, 5, or 6, characterized in that, It also includes a temperature detection element, which is a temperature sensor or thermometer, installed on the sealing part and used to extend into the sealed cavity of the insulated container to detect the temperature.

8. The device for detecting the airtightness of the vacuum layer of a thermal insulation container according to claim 1, characterized in that, The heating element covers or is close to the lower half of the outer surface of the insulated container.

9. The airtightness testing device for the vacuum layer of a thermal insulation container according to claim 1 or 8, characterized in that, The heating section is a high-temperature gas source output end that is close to the outer surface of the heat-insulating vessel.

10. The airtightness testing device for the vacuum layer of a thermal insulation container according to claim 1 or 8, characterized in that, The heating element is a flexible heating plate covering the outer surface of the insulated container.

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