CN215338771U

CN215338771U - Tightness detection device

Info

Publication number: CN215338771U
Application number: CN202121851661.7U
Authority: CN
Inventors: 刘利频; 曾旭勇
Original assignee: Guangzhou Labstone Instruments Technology Co ltd
Current assignee: Guangzhou Labstone Instruments Technology Co ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2021-12-28
Anticipated expiration: 2031-08-09

Abstract

The utility model relates to a sealing performance detection device, which is characterized in that a first air pressure detection element can detect the leakage amount of a leak hole with a first diameter range value and also can detect the permeation amount of the first diameter range value; the second air pressure detection element can be used for detecting the leakage amount of the leakage hole with the second diameter range value and the permeation amount of the leakage hole with the second diameter range value. Moreover, the first diameter range value is at least partially staggered with the second diameter range value, and the first range value is also at least partially staggered with the second range value, so that the tightness detection device of the embodiment can meet the detection requirements of leakage amount of leakage holes with different diameters and the detection requirements of different permeation amounts, and can detect samples with leakage holes with large diameter ranges and samples with different permeation amounts by using one set of tightness detection device, thereby reducing the detection cost.

Description

Tightness detection device

Technical Field

The utility model relates to the technical field of detection devices, in particular to a tightness detection device.

Background

The tightness of the package or container is a reference standard for determining whether the sample is corroded by foreign matters such as outside air, bacteria or viruses. In particular, for pharmaceutical products, the sealing performance of the package or container is required to ensure that the product is not corroded by foreign matters such as outside air, bacteria or viruses. Therefore, a need exists for leak testing of packages or containers. In general, when the sealability of a package or container is to be tested, the leakage amount or permeation amount is to be tested. The traditional detection device cannot simultaneously adapt to the detection requirements of leak holes with different diameter ranges and different permeation quantities, and a plurality of sets of detection devices need to be equipped, so that the detection cost is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a sealing performance detection device in order to solve the problem of high detection cost.

The technical scheme is as follows:

on the one hand, the device for detecting the sealing performance comprises a detection box, a first air pressure detection element and a second air pressure detection element, wherein the detection box is provided with a detection cavity for accommodating a sample and a vacuumizing channel communicated with the detection cavity, the first air pressure detection element and the second air pressure detection element are communicated with the vacuumizing channel, the first air pressure detection element is used for detecting the leakage hole of a first diameter range value and the permeation quantity of the first range value, the second air pressure detection element is used for detecting the leakage hole of a second diameter range value and the permeation quantity of the second range value, the first diameter range value and the second diameter range value are at least partially staggered, and the first range value and the second range value are at least partially staggered.

The leakproofness testing device of the embodiment is used for placing a sample into a testing cavity of a testing box when leakproofness testing is carried out. And vacuumizing the detection cavity through the vacuumizing channel, so that the vacuum degree in the detection cavity meets the corresponding detection requirement. After the vacuum degree in the detection cavity meets the detection requirement, the air pressure change in the detection cavity is detected by utilizing the first air pressure detection element or the second air pressure detection element, so that the leakage amount or the permeation amount of the sample can be detected, and the tightness of the sample can be further detected. In addition, the first air pressure detection element can detect the leakage amount of the leakage hole with the first diameter range value and can also detect the permeation amount with the first diameter range value; the second air pressure detection element can be used for detecting the leakage amount of the leakage hole with the second diameter range value and the permeation amount of the leakage hole with the second diameter range value. Moreover, the first diameter range value is at least partially staggered with the second diameter range value, and the first range value is also at least partially staggered with the second range value, so that the tightness detection device of the embodiment can meet the detection requirements of leakage amount of leakage holes with different diameters and the detection requirements of different permeation amounts, and can detect samples with leakage holes with large diameter ranges and samples with different permeation amounts by using one set of tightness detection device, thereby reducing the detection cost.

The technical solution is further explained below:

in one embodiment, the detection box comprises a first box body and a second box body, the first box body and the second box body are connected in a sealing mode and enclose the detection cavity, and the first box body or the second box body is provided with the vacuumizing channel.

In one embodiment, the first box or the second box is provided with a gas supply channel communicated with the detection cavity, and the tightness detection device further comprises a switch valve for controlling the on-off of the gas supply channel.

In one embodiment, the tightness detecting device comprises a first sealing member, the first sealing member is disposed between the first box and the second box, and the first sealing member is in sealing fit with both the first box and the second box.

In one embodiment, the tightness detection device further includes a temperature detection element and a temperature adjustment element, the temperature detection element is used for detecting the temperature in the detection cavity, the temperature adjustment element is used for adjusting the temperature in the detection cavity, and the temperature detection element is electrically connected with the temperature adjustment element.

In one embodiment, the tightness detection device further comprises a first accommodating part, the first accommodating part can be connected with the inner wall of the detection cavity in a sealing mode and encloses a containing cavity for containing a sample, and the containing cavity is communicated with the vacuum-pumping channel.

In one embodiment, the tightness detection device further comprises an auxiliary gas permeable structure disposed between the evacuation channel and the sample.

In one embodiment, the tightness detecting device further comprises a second accommodating part, the second accommodating part is connected with the first accommodating part in a sealing mode and is enclosed into the accommodating cavity, and the second accommodating part is provided with a communication through hole used for being communicated with the vacuumizing channel.

In one embodiment, the second containing part is connected with the inner wall of the detection cavity in a sealing mode; or the tightness detection device further comprises a communication joint, and the communication joint is used for communicating the communication through hole and the vacuumizing channel.

In one embodiment, the tightness detection device further comprises a vacuum-pumping element, and the vacuum-pumping element is communicated with the vacuum-pumping channel.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a seal detection apparatus for detecting a rigid package according to an embodiment;

fig. 2 is a schematic structural view of the sealability detection apparatus of fig. 1 for detecting a film or sheet;

FIG. 3 is a schematic view of the leak detection apparatus of FIG. 1 detecting the configuration of a flexible or partially rigid package;

FIG. 4 is a schematic structural view of a first receiving member of the tightness detection device of FIG. 3;

fig. 5 is a schematic structural view of a sealing performance testing apparatus according to another embodiment;

FIG. 6 is a schematic structural view of a first receiving member and a second receiving member of the tightness testing device of FIG. 5;

fig. 7 is a schematic structural view of a sealing performance detecting apparatus according to still another embodiment.

Description of reference numerals:

100. the detection box, 110, detect the cavity, 120, evacuation passageway, 130, first box, 140, the second box, 150, air feed passageway, 200, first atmospheric pressure detecting element, 300, the second atmospheric pressure detecting element, 400, ooff valve, 500, first sealing member, 600, temperature-detecting element, 700, temperature regulation element, 800, first holding member, 810, hold the chamber, 820, supplementary ventilative structure, 900, the second holding member, 910, intercommunication through-hole, 920, intercommunication connect, 1000, the sample.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 to 3, in one embodiment, a tightness detection device is provided, which includes a detection box 100, a first air pressure detection element 200 and a second air pressure detection element 300, wherein the detection box 100 is provided with a detection cavity 110 for accommodating a sample and an evacuation channel 120 communicating with the detection cavity 110, the first air pressure detection element 200 and the second air pressure detection element 300 are both communicated with the evacuation channel 120, the first air pressure detection element 200 is used for detecting a leak with a first diameter range value and a permeation amount with a first range value, the second air pressure detection element 300 is used for detecting a leak with a second diameter range value and a permeation amount with a second range value, and the first diameter range value is at least partially staggered with the second diameter range value, and the first range value is at least partially staggered with the second range value.

In the tightness detection device of the above embodiment, when the tightness is detected, a sample is placed in the detection cavity 110 of the detection box 100. The vacuum pumping channel 120 is used for performing vacuum pumping treatment on the detection cavity 110, so that the vacuum degree in the detection cavity 110 meets corresponding detection requirements. After the vacuum degree in the detection cavity 110 meets the detection requirement, the first air pressure detection element 200 or the second air pressure detection element 300 is used for detecting the air pressure change in the detection cavity 110, so that the leakage amount or the permeation amount of the sample can be detected, and the tightness of the sample can be further detected. In addition, the first air pressure detection element 200 can detect the leakage amount of the leakage hole with the first diameter range value and can also detect the permeation amount with the first diameter range value; the second air pressure detecting element 300 can detect the leakage amount of the leak hole with the second diameter range value and also can detect the penetration amount with the second diameter range value. Moreover, the first diameter range value is at least partially staggered with the second diameter range value, and the first range value is also at least partially staggered with the second range value, so that the tightness detection device of the embodiment can meet the detection requirements of leakage amount of leakage holes with different diameters and the detection requirements of different permeation amounts, and can detect samples with leakage holes with large diameter ranges and samples with different permeation amounts by using one set of tightness detection device, thereby reducing the detection cost.

The first air pressure detecting element 200 and the second air pressure detecting element 300 may be vacuum sensors or other existing elements capable of detecting air pressure.

The first diameter range value of the leak can be flexibly adjusted or designed according to actual detection requirements, for example, the first diameter range value can refer to a leak with a diameter smaller than 5um, and also can refer to a leak with a diameter smaller than 1 um; the first diameter range value may be a specific numerical value or a numerical range. Similarly, the second diameter range value of the leak can be flexibly adjusted or designed according to actual detection requirements, for example, the second diameter range value can refer to a leak with a diameter larger than 50um, or a leak with a diameter larger than 60 um; the second diameter range value may be a specific value or a numerical range.

The first diameter range value and the second diameter range value are at least partially staggered, which means that the first diameter range value and the second diameter range value may or may not have an overlapping portion.

Wherein the permeation rate having the first range value may mean that the permeation rate is 5000ml/m²The amount of permeation having the second range value of the sample per day or less may mean that the amount of permeation is 1000ml/m²Samples over a day. The first range of values and the second range of values may be specific values or ranges of values.

The first range value and the second range value are at least partially staggered, which means that the first range value and the second range value may or may not have an overlapping portion.

It should be noted that the first air pressure detecting element 200 and the second air pressure detecting element 300 may be fixed on the inner wall of the detection cavity 110 or the inner wall of the vacuum channel 120 by means of inserting or clamping, and only the change of the air pressure in the detection cavity 110 needs to be detected. The vacuum degree in the detection cavity 110 meets the corresponding detection requirement, and the specific vacuum degree can be flexibly adjusted or designed according to the actual detection requirement.

In order to facilitate the evacuation process of the detection cavity 110, the tightness detection device further includes an evacuation element (not shown) in communication with the evacuation channel 120. In this way, the vacuum pumping element can be used to evacuate the detection cavity 110 according to the detection requirement. Wherein, the vacuum-pumping element can be a vacuum pump or other existing elements capable of vacuum-pumping treatment. The evacuation channels 120 and the evacuation elements may communicate with each other via corresponding tubing or the like.

As shown in fig. 1 to 3, the detection box 100 optionally includes a first box 130 and a second box 140. The first casing 130 is hermetically connected to the second casing 140 and encloses the detection cavity 110. So, with first box 130 and the separation of second box 140, be convenient for place the sample, take spiro union, crimping etc. mode to carry out sealing connection with first box 130 and second box 140 to enclose and establish into detection cavity 110 and hold the sample, be convenient for detect the infiltration volume or the leakage volume of sample. Also, the first case 130 or the second case 140 is provided with the vacuum pumping passage 120. Thus, the opening position of the vacuuming channel 120 can be flexibly selected, and only the vacuuming treatment of the detection cavity 110 needs to be satisfied.

In addition, the test chamber 100 is divided into a first chamber 130 and a second chamber 140. As shown in fig. 1, when the sample is a rigid package such as a glass bottle, the rigid package such as a glass bottle can be placed in the detection cavity 110 for detection by using the separation or sealing connection between the first box 130 and the second box 140; as shown in fig. 2, when the sample is in a state of a film or a sheet, the film or the sheet may be fixed in the detection cavity 110 by the sealing connection between the first case 130 and the second case 140, the detection cavity 110 may be partitioned into a chamber communicating with the evacuation channel 120 and a chamber isolated from the evacuation channel 120 by the film or the sheet, the communicated chamber may be evacuated by the evacuation channel 120, and then the change in the air pressure of the chamber communicating with the evacuation channel 120 may be detected by the first air pressure detecting element 200 or the second air pressure detecting element 300, so that the leakage amount or the permeation amount of the film or the sheet may be detected.

As shown in fig. 1 to 3, 5 and 7, the first case 130 or the second case 140 is further provided with an air supply passage 150 communicating with the detection cavity 110. The sealing performance detecting apparatus further includes a switching valve 400, and the switching valve 400 is used to control the on/off of the gas supply passage 150. In this way, by controlling the conduction of the gas supply passage 150 by the switching valve 400, a carrier gas such as nitrogen or carbon dioxide can be introduced into the detection cavity 110, and the detection of the leakage amount or the permeation amount of the sample can be assisted. Particularly, when the sample is a film or a sheet, the chamber isolated from the evacuation channel 120 is communicated with the gas supply channel 150, after the communicated chamber is evacuated through the evacuation channel 120, the gas supply channel 150 is used to introduce carrier gas such as nitrogen, oxygen, carbon dioxide and the like with a certain concentration into the corresponding chamber, and then the first gas pressure detecting element 200 or the second gas pressure detecting element 300 is used to detect the change of the gas pressure of the chamber communicated with the evacuation channel 120, so that the leakage amount or the permeation amount of the film or the sheet can be detected.

Of course, before the detection starts, the gas supply channel 150 may be used to introduce the carrier gas such as nitrogen, carbon dioxide, etc. into the detection cavity 110, so as to detect the sealing performance of the whole sealing performance detection device, i.e. detect the sealing performance between the first box 130 and the second box 140, thereby obtaining the detection error, and subsequently, after the sample detection is completed, the influence of the detection error can be eliminated, so that the detection result is more accurate.

The switch valve 400 may be a solenoid valve or other conventional elements capable of controlling the on/off of the air supply passage 150. There may also be a connection pipe between the switching valve 400 and the gas supply passage 150.

As shown in fig. 1 to 3, 5 and 7, optionally, the tightness detection device comprises a first sealing member 500. The first sealing member 500 is disposed between the first casing 130 and the second casing 140, and the first sealing member 500 is in sealing engagement with both the first casing 130 and the second casing 140. Thus, the first sealing member 500 is used to make the sealing connection between the first box 130 and the second box 140 more tight and reliable, thereby preventing the detection cavity 110 from leaking air and ensuring the accuracy of the detection result. The first sealing member 500 may be a sealing ring, a gasket, or the like. A corresponding mounting groove may be formed at a contact portion of the first case 130 and/or the second case 140, and the first sealing member 500 may be placed in the mounting groove, thereby ensuring reliability and stability of sealing.

In addition, in order to ensure the detection accuracy or obtain the sealing conditions under different scenes, the detection environment can be adjusted or changed. As shown in fig. 1 to 3, 5 and 7, the tightness detection device may further include a temperature detection element 600 and a temperature adjustment element 700. The temperature sensing element 600 is used to sense the temperature inside the sensing cavity 110, and the temperature adjusting element 700 is used to adjust the temperature inside the sensing cavity 110. The temperature detecting element 600 is electrically connected to the temperature adjusting element 700. Thus, the temperature detection element 600 is used for detecting the temperature in the detection cavity 110 and transmitting the detection result to the temperature adjustment element 700, so that the temperature in the detection cavity 110 is adjusted by the temperature adjustment element 700, the temperature in the detection cavity 110 is at a set temperature value or at a required temperature value, the detection accuracy is ensured, and the sealing performance of the sample under different temperature conditions can be obtained. The temperature detecting element 600 may be a temperature sensor or other existing elements capable of detecting temperature, and may be fixed on the inner wall of the detecting cavity 110 by means of plugging, clamping, and the like. The temperature adjusting element 700 may be a heating wire or other existing element capable of changing temperature, and may be fixed on the inner wall or the outer wall of the detection box 100 in a pre-embedded manner, an insertion manner, or the like. The electric connection mode can adopt a wire connection mode, and can also adopt a wireless transmission mode such as Bluetooth and the like to realize.

In order to enable the tightness detection device to be suitable for detection requirements of samples in different states. As shown in fig. 3 and 4, in one embodiment, the tightness detection device further includes a first receiving member 800. The first receiving member 800 can be connected with the inner wall of the detection cavity 110 in a sealing manner and encloses a receiving cavity 810 for receiving a sample. And, the receiving chamber 810 communicates with the vacuum drawing passage 120. In this way, when the sample is a flexible or partially rigid package, the flexible or partially rigid package can be placed in the accommodating chamber 810, and then the inside of the accommodating chamber 810 is vacuumized through the vacuuming channel 120, so that the vacuum degree in the accommodating chamber 810 meets the corresponding detection requirement. After the vacuum degree in the accommodating cavity 810 meets the detection requirement, the first air pressure detection element 200 or the second air pressure detection element 300 is used for detecting the air pressure change in the accommodating cavity 810, so that the leakage amount or the permeation amount of the flexible or partially rigid packaging piece can be detected, and the tightness of the flexible or partially rigid packaging piece can be detected. Wherein, first container 800 can adopt modes such as spiro union, joint to be connected with first box 130 or second box 140, only need satisfy and to enclose and establish into and hold chamber 810, and hold chamber 810 and evacuation passageway 120 intercommunication can. For example, a threaded hole may be formed in the first receiving member 800, a corresponding threaded hole may be formed in the second case 140, and the first receiving member 800 may be hermetically connected to the second case 140 by using a screw and the threaded hole, such that the first receiving member 800 and the second case 140 enclose the receiving cavity 810.

Of course, a sealing element such as a sealing ring or a gasket may be disposed between the first receiving member 800 and the inner wall of the detection cavity 110 to ensure the sealing performance of the receiving cavity 810.

Meanwhile, the first accommodating part 800 is arranged in the detection cavity 110 and forms an accommodating cavity 810 with the inner side wall of the detection cavity 110, and carrier gas such as nitrogen and carbon dioxide with certain concentration can be introduced into the detection cavity 110 by using the gas supply channel 150 during or before detection, so that the air tightness of the tightness detection device can be detected, the influence of errors is obtained, and the influence of the errors can be conveniently eliminated during the detection of the sample.

As shown in fig. 4, further, the tightness detecting device further includes an auxiliary gas-permeable structure 820, and the auxiliary gas-permeable structure 820 is disposed between the vacuum-pumping channel 120 and the sample. Therefore, the auxiliary ventilation structure 820 can prevent the flexible or partially rigid packaging member from being attached to the inner wall of the accommodating cavity 810, so that the vacuum-pumping treatment cannot be performed or the air pressure change in the accommodating cavity 810 cannot be detected, and the normal operation of the detection can be ensured. The auxiliary ventilation structure 820 may be a porous sheet or may be formed by performing roughness treatment on a corresponding portion of the inner wall of the accommodating chamber 810, and only the vacuum-pumping treatment and the change detection of the air pressure of the accommodating chamber 810 are required.

As shown in fig. 5 to 7, the tightness detection device may further include a second receiving member 900. The second receiving member 900 is hermetically connected to the first receiving member 800 and encloses a receiving chamber 810. Therefore, the second accommodating part 900 is connected with the first accommodating part 800 in a screw joint, clamping connection and other modes to form the accommodating cavity 810, so that the accommodating cavity 810 is more diversified in form and can adapt to the accommodating requirements of samples in different states. Also, the second receiving member 900 is provided with a communication through hole 910 for communicating with the vacuum pumping passage 120. In this way, the storage chamber 810 can be vacuumized, and the change in the air pressure in the storage chamber 810 can also be detected.

Optionally, a sealing element such as a sealing ring or a gasket may be disposed between the first receiving member 800 and the second receiving member 900, so as to ensure the sealing performance of the receiving cavity 810.

The second receiving member 900 may be directly connected to the inner wall of the detection cavity 110, or a gap may exist.

As shown in fig. 5, the second receiving member 900 may be optionally in sealing connection with the inner wall of the detection cavity 110. Thus, the second accommodating part 900 can be connected with the first box 130 or the second box 140 by means of screw connection, clamping connection and the like, and only the requirement that the connecting through holes are communicated with the vacuumizing channel 120 is met. For example, a threaded hole may be formed in the second receiving member 900, a corresponding threaded hole may be formed in the second casing 140, and the second receiving member 900 may be hermetically connected to the second casing 140 by using a screw and the threaded hole to connect the connecting through hole to the vacuum pumping passage 120.

Further, sealing elements such as corresponding sealing rings can be arranged between the connecting through hole and the vacuum pumping channel 120, and only the sealing performance is required.

As shown in fig. 7, the tightness detecting device may further include a communication joint 920 for communicating the communication through hole 910 and the vacuum pumping channel 120. In this way, after the first accommodating part 800 and the second accommodating part 900 are connected to enclose the accommodating cavity 810, the communication joint 920 is used to connect the communication through hole 910 with the vacuum channel 120, so that the vacuum pumping element can perform vacuum pumping treatment on the accommodating cavity 810.

The measurement and calculation of the leakage amount and the permeation amount in the sealing performance detection apparatus of the above embodiment may be performed according to any conventional method, and may be performed by a method such as a vacuum attenuation method, for example, as long as the sealing performance of the sample can be detected.

The "certain body" and the "certain portion" may be a part corresponding to the "member", that is, the "certain body" and the "certain portion" may be integrally formed with the other part of the "member"; the "part" can be made separately from the "other part" and then combined with the "other part" into a whole. The expressions "a certain body" and "a certain part" in the present application are only one example, and are not intended to limit the scope of the present application for reading convenience, and the technical solutions equivalent to the present application should be understood as being included in the above features and having the same functions.

It should be noted that, the components included in the "unit", "assembly", "mechanism" and "device" of the present application can also be flexibly combined, i.e., can be produced in a modularized manner according to actual needs, so as to facilitate the modularized assembly. The division of the above-mentioned components in the present application is only one example, which is convenient for reading and is not a limitation to the protection scope of the present application, and the same functions as the above-mentioned components should be understood as equivalent technical solutions in the present application.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" and "first" are used 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 "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered as "fixed transmission connection" with another element, the two elements may be fixed in a detachable connection manner or in an undetachable connection manner, and power transmission can be achieved, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be achieved in the prior art, and is not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The sealing performance detection device is characterized by comprising a detection box, a first air pressure detection element and a second air pressure detection element, wherein the detection box is provided with a detection cavity for accommodating a sample and a vacuumizing channel communicated with the detection cavity, the first air pressure detection element and the second air pressure detection element are communicated with the vacuumizing channel, the first air pressure detection element is used for detecting a leak hole with a first diameter range value and the permeation quantity of the first range value, the second air pressure detection element is used for detecting the leak hole with a second diameter range value and the permeation quantity of the second range value, the first diameter range value and the second diameter range value are at least partially staggered, and the first range value and the second range value are at least partially staggered.

2. The tightness testing device according to claim 1, wherein said testing box comprises a first box and a second box, said first box and said second box are hermetically connected and enclose said testing cavity, and said first box or said second box is provided with said vacuum channel.

3. The tightness detection device according to claim 2, wherein the first case or the second case is provided with a gas supply passage communicating with the detection cavity, and the tightness detection device further comprises a switching valve for controlling on/off of the gas supply passage.

4. The tightness detection device according to claim 2, wherein the tightness detection device comprises a first sealing member disposed between the first case and the second case, and the first sealing member is in sealing engagement with both the first case and the second case.

5. The leak detection apparatus according to claim 1, further comprising a temperature detection element for detecting a temperature in the detection cavity, and a temperature adjustment element for adjusting the temperature in the detection cavity, the temperature detection element being electrically connected to the temperature adjustment element.

6. The tightness detection device according to any one of claims 1 to 5, further comprising a first receiving member capable of being sealingly connected to an inner wall of the detection cavity and enclosing a receiving cavity for receiving a sample, wherein the receiving cavity is communicated with the vacuum-pumping channel.

7. The leak detection apparatus according to claim 6, further comprising an auxiliary gas permeable structure disposed between the evacuation channel and the sample.

8. The leak detection apparatus according to claim 6, further comprising a second receiving member that is sealingly connected to the first receiving member and encloses the receiving chamber, and the second receiving member is provided with a communication through-hole for communicating with the evacuation passage.

9. The leak detection device of claim 8, wherein the second receiving member is sealingly connected to an inner wall of the detection cavity; or the tightness detection device further comprises a communication joint, and the communication joint is used for communicating the communication through hole and the vacuumizing channel.

10. The leak detection device according to any one of claims 1 to 5, further comprising an evacuation element that communicates with the evacuation channel.