CN115993215A - Air filling device, air tightness testing device, air filling method and air tightness testing method - Google Patents
Air filling device, air tightness testing device, air filling method and air tightness testing method Download PDFInfo
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Abstract
The application discloses an inflation device, an airtight testing device, an inflation method and an airtight testing method. The inflation device comprises a pressure container, a primary pre-inflation assembly and a secondary inflation assembly. The primary pre-charge assembly is configured to charge a first preset pressure of gas to the pressure vessel; the secondary inflation assembly is configured to inflate a first preset pressure of gas within the pressure vessel into a target workpiece to balance pressure between the pressure vessel and the target workpiece. According to the scheme, the gas pressure of the first preset pressure filled into the pressure container is controllable, so that the risk of overcharging can be fundamentally avoided, the gas of the first preset pressure filled into the pressure container is still high-pressure gas, and compared with normal-pressure gas filling, the high-pressure gas is filled into a target workpiece, and the target workpiece can be rapidly filled. Therefore, the inflation of the target workpiece can be realized rapidly and safely through the scheme.
Description
Technical Field
The application relates to the field of air tightness detection, in particular to an air charging device, an air tightness testing device, an air charging method and an air tightness testing method.
Background
The method for rapidly inflating the target workpiece by using the constant high pressure adopted by the related technology has the risk of over-inflation, and the target workpiece is easy to damage.
Disclosure of Invention
In view of the above, the present application provides an inflator, an airtight testing apparatus, an inflation method, and an airtight testing method, capable of rapidly and safely achieving inflation of a target workpiece.
In a first aspect, the present application provides an inflator device comprising:
a pressure vessel;
a primary pre-charge assembly configured to charge a first preset pressure of gas to the pressure vessel; the method comprises the steps of,
a secondary inflation assembly configured to inflate a first preset pressure of gas within the pressure vessel into a target workpiece to balance pressure between the pressure vessel and the target workpiece.
The embodiment of the application provides an inflation device, adopts pressure vessel as the intermediate medium, and pressure vessel links to each other with primary pre-inflation subassembly and secondary inflation subassembly respectively. The method comprises the steps of filling gas with a first preset pressure into a pressure container through a primary pre-filling assembly, rotating the pressure container, and filling the gas with the first preset pressure into a target workpiece through a secondary filling assembly. Thus, the pressure of the pressure container and the pressure of the target workpiece are balanced, so that the target workpiece can be rapidly and safely filled with the gas with the target pressure. According to the scheme, the gas pressure of the first preset pressure filled into the pressure container is controllable, so that the risk of overcharging can be fundamentally avoided, the gas of the first preset pressure filled into the pressure container is still high-pressure gas, and compared with normal-pressure gas filling, the high-pressure gas is filled into a target workpiece, and the target workpiece can be rapidly filled. Therefore, the inflation of the target workpiece can be realized rapidly and safely through the scheme.
In some embodiments of the present application, the primary pre-charge assembly comprises:
an air source assembly;
the pressure container is connected with the air source assembly through the first pipeline; and, a step of, in the first embodiment,
and the first valve is arranged on the first pipeline to connect or disconnect the pressure container and the air source assembly.
In this embodiment, the air supply assembly is connected to the pressure vessel through a first line of the primary pre-charge assembly, and a first valve is provided on the first line. When the first valve is opened, the gas source assembly charges the pressure vessel 1 with a gas of a preset pressure in the direction of arrow L.
In some embodiments of the present application, the secondary air inflation assembly comprises:
the pressure vessel is connected with the target workpiece through the second pipeline; and, a step of, in the first embodiment,
a second valve provided to the second pipe to connect or disconnect the pressure vessel to the target workpiece;
when the second valve is turned on, a gas of a first preset pressure in the pressure vessel is filled into the target workpiece through the second valve to balance the pressure between the pressure vessel and the target workpiece.
In this embodiment, the target workpiece is connected to the pressure vessel via a second line of the secondary air charging assembly, and a second valve is disposed on the second line. When the second valve is opened, the gas with the first preset pressure in the pressure container can be filled into the target workpiece.
In some embodiments of the present application, the inflator device further comprises:
and the normal pressure inflation assembly is connected with the air source assembly so as to inflate the target workpiece with air with a first preset pressure.
The application also adds an atmospheric pressure inflation assembly on the basis of the embodiment. The normal pressure inflation assembly is independently used when the primary pre-inflation assembly and the secondary inflation assembly stop working, so that the pressure of gas inflated into a target workpiece can reach a more accurate pressure range.
In some embodiments of the present application, the atmospheric inflation assembly comprises:
the air source assembly is connected with the target workpiece through the third pipeline; and, a step of, in the first embodiment,
and the third valve is arranged on the third pipeline so as to adjust the pressure of the gas filled by the gas source assembly to the target workpiece to a first preset pressure.
In this embodiment of the application, after closing the first valve of the primary pre-charging assembly and the second valve of the secondary charging assembly, the third valve of the normal pressure charging assembly is opened again, so that the gas pressure charged into the target workpiece can reach a more accurate pressure range.
In a second aspect, the present application provides an air tightness testing apparatus comprising:
the inflator according to the first aspect described above, and,
the leak detection assembly is connected with the pressure container and the target workpiece; the leak detection assembly is configured to detect the gas tightness of a target workpiece by measuring a pressure differential and/or a flow between a pressure vessel and the target workpiece after pressure equalization between the pressure vessel and the target workpiece.
In the airtight test equipment provided by the embodiment of the application, the leak detection assembly is connected with the pressure container and the target workpiece, and after the pressure container and the target workpiece are inflated to be balanced, the pressure difference and/or the flow between the pressure container and the target workpiece are measured through the leak detection assembly, so that the airtight performance of the target workpiece can be detected.
In some embodiments of the present application, the leak detection assembly includes:
one end of the fourth pipeline is connected with the pressure container through the primary pre-inflation assembly, and the other end of the fourth pipeline is connected with the target workpiece through the secondary inflation assembly; and, a step of, in the first embodiment,
and the first sensor is arranged on the fourth pipeline so as to measure the pressure difference and/or the flow between the pressure container and the target workpiece.
The embodiment of the application adopts an indirect connection mode, and the first pipeline and the second pipeline can be multiplexed, so that the inflation of a target workpiece with only one interface can be realized.
In some embodiments of the present application, the leak detection assembly comprises a leak detector comprising the first sensor.
In embodiments of the present application, a leak detection assembly may detect the gas tightness of a target workpiece using a leak detector having a first sensor. The leak detector is also called as a gas tightness detector, and has the advantages of accurate detection result and durable instrument.
In some embodiments of the present application, the leak detector further comprises a vent valve for venting gas from the pressure vessel and/or the target workpiece.
In the embodiment of the application, the leak detector with the exhaust valve can conveniently realize the discharge of the gas in the pressure container and/or the target workpiece.
In a third aspect, the present application provides an inflation method, which is applied to the inflation device described in the first aspect, the method including:
acquiring the free volume of a target workpiece, the free volume of a pressure container and the target pressure of gas to be filled into the target workpiece;
determining a first pressure of gas charged into the pressure vessel based on the free volume of the target workpiece, the free volume of the pressure vessel, and the target pressure;
charging the pressure vessel with a gas at a first pressure;
and filling the gas with the first pressure in the pressure container into the target workpiece, so that the target workpiece obtains the gas with the target pressure.
According to the method, the gas with the first preset pressure is filled into the pressure container, and then the gas is transferred through the pressure container, so that the gas with the first preset pressure filled into the pressure container is filled into the target workpiece. Thus, the pressure of the pressure container and the pressure of the target workpiece are balanced, so that the target workpiece can be rapidly and safely filled with the gas with the target pressure. According to the scheme, the gas pressure of the first preset pressure filled into the pressure container is controllable, so that the risk of overcharging can be fundamentally avoided, the gas of the first preset pressure filled into the pressure container is still high-pressure gas, and compared with normal-pressure gas filling, the high-pressure gas is filled into a target workpiece, and the target workpiece can be rapidly filled. Therefore, the inflation of the target workpiece can be realized rapidly and safely through the scheme.
In some embodiments of the present application, the acquiring the free volume of the target workpiece includes:
filling gas with a second preset pressure into the pressure container;
the pressure vessel is communicated with the target workpiece, so that the gas with the second preset pressure is filled into the target workpiece and balanced;
detecting balance pressure after the pressure between the pressure container and the target workpiece is balanced;
and determining the free volume of the target workpiece according to the second preset pressure, the balance pressure and the free volume of the pressure container.
According to the method and the device for automatically inflating the target workpiece, before the target workpiece is formally inflated, the high-pressure gas is inflated into the pressure container in advance, namely, the second preset pressure gas is inflated into the pressure container, and the free volume of the target workpiece can be rapidly and accurately determined by utilizing the pressure balance and the pressure balance formula achieved by the pressure container and the target workpiece.
In a fourth aspect, the present application provides a method for testing air tightness, which is applied to the air tightness testing device in the second aspect, and the method includes:
the inflation method according to the third aspect described above;
after the step of charging the target workpiece with the gas having the first pressure within the pressure vessel, the method further comprises:
and after the pressure between the pressure container and the target workpiece is balanced, measuring the pressure difference and/or the flow between the pressure container and the target workpiece through a leakage detection assembly so as to detect the air tightness of the target workpiece.
According to the embodiment of the application, the pressure difference and/or the flow between the pressure container and the target workpiece are detected through the leak detection assembly, so that the detection of the air tightness of the target workpiece can be conveniently realized.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
FIG. 1 is a schematic view of an inflator according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of another inflator according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of another inflator according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of an airtight testing apparatus according to an embodiment of the present application;
FIG. 5 is a schematic flow chart of an inflation method according to an embodiment of the present disclosure;
fig. 6 is a flow chart of an airtight testing method according to an embodiment of the present application.
Reference numerals in the specific embodiments are as follows:
1-a pressure vessel;
21-a primary pre-inflation assembly; 211-an air source assembly; 2111-gas source; 2112—a pressure regulating valve; 212-a first line; 213-a first valve;
22-a secondary inflation assembly; 221-a second line; 222-a second valve;
23-an atmospheric inflation assembly; 231-a third line; 232-a third valve;
24-leak detection assembly; 241-fourth line; 242-leak detector;
3-target workpiece.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: there are three cases, a, B, a and B simultaneously. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Currently, the battery is mounted to the electrical device as an integral packaging structure, requiring a sealing packaging process for the battery to protect the chemical system and electrical system of the battery. Therefore, in the production process of the battery, it is necessary to perform air tightness detection on the packaging structure of the battery to detect the overall sealing performance of the battery packaging structure.
At present, in the process of detecting the tightness by using an inflation means, in order to improve the inflation efficiency, when the target workpiece is inflated by the related technology, the target workpiece is directly and rapidly inflated by adopting constant high pressure, but the target workpiece is easily damaged due to the risk of over-inflation caused by adopting constant high pressure inflation; moreover, the inflation system requires a sufficient interface for the gas flux other than the inflation port to perform inflation pressure monitoring, which complicates the inflation system structure; when the volume of the target workpiece is large, the inflation efficiency is too low, and the mass production efficiency of the product is limited. In order to solve the above problems, the inventors have studied and proposed an inflator, an airtight testing apparatus, an inflation method, and an airtight testing method in the present application, in which a pressure vessel is used as an intermediate medium, a gas of a first preset pressure is filled into the pressure vessel, and then the gas of the first preset pressure filled into the pressure vessel is transferred through the pressure vessel, and is filled into a target workpiece. Thus, the pressure of the pressure container and the pressure of the target workpiece are balanced, so that the target workpiece can be rapidly and safely filled with the gas with the target pressure. According to the scheme, the gas pressure of the first preset pressure filled into the pressure container is controllable, so that the risk of overcharging can be fundamentally avoided, the gas of the first preset pressure filled into the pressure container is still high-pressure gas, and compared with normal-pressure gas filling, the high-pressure gas is filled into a target workpiece, and the target workpiece can be rapidly filled.
The inflation device can be suitable for the airtight detection step of the closed shell in the battery manufacturing process, and can also be applied to the detection of the shell airtightness of other related products.
An inflator according to an embodiment of the present application will be described with reference to the drawings.
As shown in fig. 1, an embodiment of the present application provides an inflator. The inflator includes a pressure vessel 1, a primary pre-inflation assembly 21, and a secondary inflation assembly 22. The primary pre-charge assembly 21 is configured to charge the pressure vessel 1 with a gas at a first preset pressure. The secondary charging assembly 22 is configured to charge a gas of a first preset pressure within the pressure vessel 1 into the target workpiece 3 to balance the pressure between the pressure vessel 1 and the target workpiece 3.
It should be noted that, in the drawings of the present application, the structure in the dashed boxes of fig. 1 to 4 is the inflator provided in the present application, and the target workpiece 3 with a shadow in the drawings is the workpiece to be inflated. In the drawing, the direction indicated by the arrow L is the direction in which the primary pre-charging unit 21 charges the pressure vessel 1 with the gas at the first preset pressure, and the direction indicated by the arrow M is the direction in which the pressure vessel 1 charges the target workpiece 3 with the gas at the first preset pressure therein by the secondary charging unit 22.
The inflation device provided in the embodiment of the application adopts the pressure container 1 as an intermediate medium, and the pressure container 1 is respectively connected with the primary pre-inflation assembly 21 and the secondary inflation assembly 22. The pressure vessel 1 may be a sealed vessel having a volume that can contain a predetermined constant high pressure gas. The primary pre-inflation assembly 21 is the air supply assembly portion, and the secondary inflation assembly 22 is the secondary operation portion that is performed after the primary pre-inflation. The assembly means that the structure of the part module may comprise a single structural member or may comprise a combination of several structural members.
The method comprises the steps of filling gas with a first preset pressure into a pressure container 1 through a primary pre-charging assembly 21, rotating the pressure container 1, and filling the gas with the first preset pressure into a target workpiece 3 through a secondary charging assembly 22. In this way, the target workpiece 3 can be rapidly and safely filled with the gas of the target pressure by using the pressure balance between the pressure vessel 1 and the target workpiece 3. According to the scheme, the gas pressure of the first preset pressure filled into the pressure container 1 is controllable, so that the risk of overcharging can be fundamentally avoided, the gas of the first preset pressure filled into the pressure container 1 is still high-pressure gas, and compared with normal-pressure gas filling, the high-pressure gas is filled into the target workpiece 3, and the rapid gas filling of the target workpiece 3 can be realized. Therefore, the inflation of the target workpiece 3 can be achieved quickly and safely by the present solution.
In some embodiments of the present application, as shown in fig. 1 and 2, the primary pre-charge assembly 21 includes an air source assembly 211, a first conduit 212, and a first valve 213. The pressure vessel 1 is connected to a gas source assembly 211 via a first line 212. A first valve 213 is provided in the first line 212 to switch on or off the connection of the pressure vessel 1 to the gas source assembly 211.
The gas source assembly 211 includes a gas source 2111, the gas provided by the gas source 2111 may be compressed gas, and the compressed gas may be air, nitrogen, argon or the like, and the specific type of the gas is determined according to the actual material and the actual requirement of the target workpiece 3.
The gas source assembly 211 may further include a pressure regulating valve 2112 that regulates the output gas pressure of the gas source 2111. The pressure regulating valve 2112 may be a shut-off valve, or the like, and various control methods of the pressure regulating valve 2112 may be employed, for example, pneumatic control, electric control, hydraulic control, or the like. When the gas source assembly 211 does not include a pressure regulating valve 2112, the gas source 2111 is a gas source that outputs a preset pressure of gas. In addition, the air source assembly 211 may include other fittings such as pneumatic triplexes.
The first pipeline 212 may be a pipeline with a certain cross-sectional area for gas circulation, and may be a metal pipeline or a plastic pipeline, as long as the material is heat-resistant and corrosion-resistant in the actual use environment, and has a stable structural performance for maintaining gas circulation.
The first valve 213 may be a shut-off valve, or the like. The structure of the stop valve is various, for example, the stop valve can be a straight-through stop valve, a plunger type stop valve and the like, and the stop valve can be selected according to actual needs in application.
In the embodiment of the present application, the air source assembly 211 is connected to the pressure vessel 1 through a first pipe 212 of the primary pre-charging assembly 21, and a first valve 213 is provided on the first pipe 212. Referring to fig. 2, when the first valve 213 is opened, the gas source assembly 211 charges the pressure vessel 1 with a gas of a preset pressure in the direction of arrow L.
In some embodiments of the present application, as shown in fig. 1 and 2, the secondary air inflation assembly 22 includes a second conduit 221 and a second valve 222. The pressure vessel 1 is connected to the target workpiece 3 via a second line 221. A second valve 222 is provided to the second pipe 221 to switch on or off the connection of the pressure vessel 1 to the target workpiece 3. When the second valve 222 is turned on, the gas of the first preset pressure inside the pressure vessel 1 is filled into the target workpiece 3 through the second valve 222 to balance the pressure between the pressure vessel 1 and the target workpiece 3.
In the embodiment of the present application, the target workpiece 3 is connected to the pressure vessel 1 through the second pipe 221 of the secondary air charging assembly 22, and the second valve 222 is provided on the second pipe 221. The type and control of the second valve 222 are similar to those of the first valve 213, and will not be described here. When the second valve 222 is opened, the gas of the first preset pressure in the pressure vessel 1 is filled into the target workpiece 3.
When connected to the pressure vessel 1, the secondary air charging unit 22 may share a line with the primary pre-air charging unit 21 (see fig. 2 and 3), or may be connected to the pressure vessel 1 alone. It will be appreciated that when the secondary air charging assembly 22 and the primary air pre-charging assembly 21 share a pipeline connected to the pressure vessel 1, the first valve 213 of the primary air pre-charging assembly 21 is closed before the gas of the first preset pressure in the pressure vessel 1 is charged into the target workpiece 3 to prevent the gas from leaking.
In some embodiments of the present application, the inflator device further includes an atmospheric inflator assembly 23. The atmospheric pressure gas charging assembly 23 is connected to the gas source assembly 211 to charge the target workpiece 3 with a gas of a first preset pressure.
The inflation device provided by the embodiment of the application can realize rapid and safe inflation of target workpieces 3 with various different specifications and models. The pressure range of inflation can meet the requirements of most target workpieces 3, and the pressure of the gas inflated into the target workpieces 3 can reach a pressure range of 3.0+/-0.5 Kpa.
Considering the structural differences of target workpieces 3 with different specifications and models, when the pressure vessel 1 is adopted to charge the target workpieces 3 and the pressure balance is achieved, the balance pressure consistency between the pressure vessel 1 and the target workpieces 3 is poor. To meet the need for a more accurate inflation gas pressure for a portion of the target workpiece 3, the present application also adds an atmospheric inflation assembly 23 to the above-described embodiments. The normal pressure inflating assembly 23 is used alone when the primary pre-inflating assembly 21 and the secondary inflating assembly 22 stop working, so that the pressure of the gas inflated into the target workpiece 3 can reach a more accurate pressure range, for example, a pressure range of 3.0+/-0.1 Kpa.
In some embodiments of the present application, as shown in fig. 3, the atmospheric inflation assembly 23 includes a third conduit 231 and a third valve 232. The gas source assembly 211 is connected to the target workpiece 3 via a third line 231. A third valve 232 is disposed in the third pipeline 231 to regulate the pressure of the gas filled into the target workpiece 3 by the gas source assembly 211 to a first preset pressure.
In this embodiment, the air source assembly 211 is connected to the target workpiece 3 through a third pipeline 231 of the normal pressure inflating assembly 23, and a third valve 232 is disposed on the third pipeline 231. The third valve 232 is similar to the first valve 213 in kind and control manner, and will not be described here. When the first valve 213 of the primary pre-charging assembly 21 and the second valve 222 of the secondary charging assembly 22 are closed, the third valve 232 of the normal pressure charging assembly 23 is opened again, so that the gas pressure charged into the target workpiece 3 can reach a more accurate pressure range.
Embodiments of the present application also provide an air tightness testing apparatus that may include an inflator device as in the embodiments described above, as well as leak detection assembly 24. The leak detection assembly 24 is connected with the pressure vessel 1 and the target workpiece 3; the leak detection assembly 24 is configured to detect the gas tightness of the target workpiece 3 by measuring the pressure differential and/or flow between the pressure vessel 1 and the target workpiece 3 after the pressure balance between the pressure vessel 1 and the target workpiece 3.
The leak detection assembly 24 may directly connect the pressure vessel 1 and the target workpiece 3, or may indirectly connect the pressure vessel 1 and the target workpiece 3. In order to make the layout of the description clear and concise, the manner of indirect connection is described in detail below.
In the airtight test apparatus provided in the embodiment of the present application, the leak detection assembly 24 is connected to the pressure vessel 1 and the target workpiece 3, and after the pressure vessel 1 and the target workpiece 3 are inflated and reach pressure equilibrium, the pressure difference and/or the flow between the pressure vessel 1 and the target workpiece 3 are measured by the leak detection assembly 24, so that the airtight of the target workpiece 3 can be detected.
In some embodiments of the present application, as shown in FIG. 4, leak detection assembly 24 includes a fourth conduit 241 and a first sensor. One end of the fourth pipeline 241 is connected with the pressure vessel 1 through the primary pre-inflating assembly 21, and the other end is connected with the target workpiece 3 through the secondary inflating assembly 22;
the first sensor is provided in the fourth pipe 241 to measure the pressure difference and/or the flow rate between the pressure vessel 1 and the target workpiece 3.
The direction indicated by the arrow N in fig. 4 is a direction in which the gas of the pressure vessel 1 flows toward the target workpiece 3 when there is a leak in the target workpiece 3 during the pressure equalization of the pressure vessel 1 and the target workpiece 3.
The first sensor may be a flow sensor or a flow sensor, or may be a multifunctional sensor integrating flow detection and differential pressure detection. The first sensor is disposed on the fourth pipe 241.
In this embodiment, referring to fig. 4, leak detection assembly 24 may be connected to pressure vessel 1 and target workpiece 3 by an indirect connection, i.e., leak detection assembly 24 may be connected to pressure vessel 1 and target workpiece 3 by primary pre-charge assembly 21 and secondary charge assembly 22, respectively. Specifically, as shown in FIG. 4, one end of the fourth conduit 241 of the leak detection assembly 24 is connected to the first conduit 212 of the primary pre-charge assembly 21 such that the fourth conduit 241 may communicate with the pressure vessel 1 via the first conduit 212. And, the other end of the fourth pipe 241 of the leak detection assembly 24 is connected to the second pipe 221 of the secondary air charging assembly 22, so that the fourth pipe 241 can communicate with the target workpiece 3 via the second pipe 221. It will be appreciated that after pressure equalization between the pressure vessel 1 and the target workpiece 3, the leak detection assembly 24 may be configured to effect a leak tightness test of the pressure vessel 1 and the target workpiece 3 by closing the second valve 222 and then opening the first valve 213.
In this manner of indirect connection, the first line 212 and the second line 221 may be multiplexed. Since the fourth pipe 241 can be connected to the pressure vessel 1 and the target workpiece 3 without providing a separate pipe, the number of pipe connections to the pressure vessel 1 and the target workpiece 3 can be reduced, and the present invention is particularly suitable for the target workpiece 3 having only one connection.
In some embodiments of the present application, as shown in FIG. 4, leak detection assembly 24 includes a leak detector 242, leak detector 242 including a first sensor.
In embodiments of the present application, leak detection assembly 24 may employ leak detector 242 having a first sensor to detect the gas tightness of target workpiece 3. Leak detector 242, also known as a gas tightness detector, has the advantages of accurate detection results and durable instrumentation.
In some embodiments of the present application, leak detector 242 also includes a vent valve for venting gas from pressure vessel 1 and/or target workpiece 3.
In the present embodiment, the leak detector 242 with the vent valve may be used to facilitate venting of gas from the pressure vessel 1 and/or the target workpiece 3.
Corresponding to the inflator in the above embodiment, the embodiment of the present application also provides an inflation method. As shown in fig. 5, the method may include the steps of:
s101, the free volume of the target workpiece 3, the free volume of the pressure vessel 1, and the target pressure of the gas to be filled into the target workpiece 3 are acquired.
Wherein, the free volume refers to the volume of the space inside the object, but not the volume of the space outside the object. Taking the target workpiece as an example, the free volume of the target workpiece is the volume of the interior space except for that which has been filled with interior parts, rather than the volume of the target workpiece itself. The free volume of the target workpiece 3 is generally known, and when its free volume is unknown, a free volume measurement may be performed in advance. The pressure vessel 1 is of a pre-designed construction, the specification parameters of which are known. The target pressure at which the target workpiece 3 is to be inflated is typically the actual required pressure and is therefore determined prior to inflation. 5
S102, determining the first pressure of the gas filled into the pressure container 1 according to the free volume of the target workpiece 3, the free volume of the pressure container 1 and the target pressure.
The embodiment of the application realizes the rapid inflation of the target workpiece 3 by utilizing the pressure balance of the pressure container 1 and the target workpiece 3. Therefore, a first pressure of the gas to be charged into the pressure vessel 1 is determined before the pressure vessel 1 is inflated.
When the free volume of the target workpiece 3, the free volume of the pressure vessel 1, and the target pressure of the gas to be charged into the target workpiece 3 are known, they can be determined by calculation of the pressure balance formula p1=p2 (v1+v2)/V1. Wherein P1 is the first pressure of the gas charged into the pressure vessel 1; p2 is the target pressure at which the target workpiece 3 is to be inflated with gas; v1 is the free volume of the pressure vessel 1; v2 is the free volume of the target workpiece 3.
S103, filling the pressure vessel 1 with a gas having a first pressure.
When a first pressure of the gas charged into the pressure vessel 1 is determined, the pressure vessel 1 may be charged with the gas at the first pressure. For example, the pressure vessel 1 may be charged with a gas at a first pressure by the primary pre-charge assembly 21 in the above-described embodiments.
S104, the gas having the first pressure in the pressure vessel 1 is filled into the target workpiece 3, so that the target workpiece 3 obtains the gas having the target pressure.
Subsequently, the gas having the first pressure in the pressure vessel 1 is again filled into the target workpiece 3, and for example, the target workpiece 3 may be filled with the gas having the first preset pressure in the pressure vessel 1 by the secondary charging assembly 22 in the above-described embodiment. After the pressure vessel 1 and the target workpiece 3 are pressure-balanced, the target workpiece 3 can be brought to a gas having a target pressure.
According to the embodiment of the application, the gas with the first preset pressure filled into the pressure container 1 is filled into the target workpiece 3 through the gas with the first preset pressure filled into the pressure container 1 and then transferred through the pressure container 1. In this way, the target workpiece 3 can be rapidly and safely filled with the gas of the target pressure by using the pressure balance between the pressure vessel 1 and the target workpiece 3. According to the scheme, the gas pressure of the first preset pressure filled into the pressure container 1 is controllable, so that the risk of overcharging can be fundamentally avoided, the gas of the first preset pressure filled into the pressure container 1 is still high-pressure gas, and compared with normal-pressure gas filling, the high-pressure gas is filled into the target workpiece 3, and the rapid gas filling of the target workpiece 3 can be realized. Therefore, the inflation of the target workpiece 3 can be achieved quickly and safely by the present solution.
In some embodiments of the present application, in order to avoid that the measurement of the free volume of the target workpiece 3 consumes a lot of manpower and resources when the free volume of the target workpiece 3 is unknown, a step of rapidly and accurately acquiring the free volume of the target workpiece 3 is proposed. The step of acquiring the free volume of the target workpiece 3 specifically includes:
step one, filling gas with a second preset pressure into the pressure container 1.
Step two, conducting the pressure vessel 1 and the target workpiece 3, so that gas with a second preset pressure is filled into the target workpiece 3 and balanced;
and step three, after the pressure between the pressure vessel 1 and the target workpiece 3 is balanced, detecting the balanced pressure.
And step four, determining the free volume of the target workpiece 3 according to the second preset pressure, the balance pressure and the free volume of the pressure container 1.
According to the embodiment of the application, before the target workpiece 3 is formally inflated, the pressure vessel 1 is inflated with high-pressure gas in advance, namely, the pressure vessel 1 is inflated with gas with the second preset pressure, and the free volume of the target workpiece 3 can be rapidly and accurately determined by utilizing the pressure balance and the pressure balance formula achieved by the pressure vessel 1 and the target workpiece 3.
Corresponding to the air tightness test device in the embodiment, the application also provides an air tightness test method. As shown in fig. 6, the test method may include the steps of:
s201, the free volume of the target workpiece 3, the free volume of the pressure vessel 1, and the target pressure of the gas to be filled into the target workpiece 3 are acquired.
S202, determining a first pressure of the gas filled into the pressure vessel 1 according to the free volume of the target workpiece 3, the free volume of the pressure vessel 1 and the target pressure.
S203, filling the pressure vessel 1 with a gas having a first pressure.
S204, the gas having the first pressure in the pressure vessel 1 is filled into the target workpiece 3, so that the target workpiece 3 obtains the gas having the target pressure.
In this embodiment, steps S201 to S204 may be the same as steps S101 to S104 in the above embodiment, and are not described herein.
S205, after the pressure between the pressure vessel 1 and the target workpiece 3 is balanced, the pressure difference and/or the flow rate between the pressure vessel 1 and the target workpiece 3 is measured by the leak detection assembly 24 to detect the air tightness of the target workpiece 3.
The embodiment of the application detects the pressure difference and/or the flow between the pressure container 1 and the target workpiece 3 through the leak detection assembly 24, so that the detection of the air tightness of the target workpiece 3 can be conveniently realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (12)
1. An inflator device, comprising:
a pressure vessel (1);
a primary pre-charge assembly (21), the primary pre-charge assembly (21) being configured to charge the pressure vessel (1) with a gas at a first preset pressure; the method comprises the steps of,
-a secondary inflation assembly (22), the secondary inflation assembly (22) being configured to inflate a first preset pressure of gas within the pressure vessel (1) into a target workpiece (3) to balance the pressure between the pressure vessel (1) and the target workpiece (3).
2. The inflator device according to claim 1, wherein the primary pre-inflation assembly (21) includes:
a gas source assembly (211);
a first pipeline (212), wherein the pressure vessel (1) is connected with the air source assembly (211) through the first pipeline (212); and, a step of, in the first embodiment,
-a first valve (213), said first valve (213) being arranged in said first conduit (212) to switch on or off the connection of said pressure vessel (1) to said gas source assembly (211).
3. The inflator device of claim 1 or 2, wherein the secondary inflation assembly (22) comprises:
a second line (221), through which second line (221) the pressure vessel (1) is connected to the target workpiece (3); and, a step of, in the first embodiment,
a second valve (222), the second valve (222) being provided to the second pipe (221) to switch on or off the connection of the pressure vessel (1) and the target workpiece (3);
when the second valve (222) is turned on, a gas of a first preset pressure in the pressure vessel (1) is filled into the target workpiece (3) through the second valve (222) to balance the pressure between the pressure vessel (1) and the target workpiece (3).
4. The inflator device of claim 2, wherein the inflator device further comprises:
and the normal pressure inflating assembly (23) is connected with the air source assembly (211) so as to inflate the target workpiece (3) with air with a first preset pressure.
5. The inflator device of claim 4, wherein the atmospheric inflator assembly (23) comprises:
a third pipeline (231), wherein the air source assembly (211) is connected with the target workpiece (3) through the third pipeline (231); and, a step of, in the first embodiment,
and a third valve (232), wherein the third valve (232) is arranged on the third pipeline (231) so as to adjust the gas pressure of the gas source assembly (211) filled into the target workpiece (3) to a first preset pressure.
6. An air tightness testing apparatus, comprising:
the inflator according to any one of claim 1 to 5, and,
a leak detection assembly (24), wherein the leak detection assembly (24) is connected with the pressure container (1) and the target workpiece (3); the leak detection assembly (24) is configured to detect the gas tightness of a target workpiece (3) by measuring a pressure difference and/or a flow between the pressure vessel (1) and the target workpiece (3) after a pressure balance between the pressure vessel (1) and the target workpiece (3).
7. The air tightness testing apparatus of claim 6 wherein the leak detection assembly (24) comprises:
a fourth pipeline (241), wherein one end of the fourth pipeline (241) is connected with the pressure container (1) through the primary pre-inflating assembly (21), and the other end of the fourth pipeline is connected with the target workpiece (3) through the secondary inflating assembly (22); and, a step of, in the first embodiment,
a first sensor arranged in the fourth pipeline (241) for measuring the pressure difference and/or the flow between the pressure vessel (1) and the target workpiece (3).
8. The air tightness test apparatus of claim 7 wherein said leak detection assembly (24) comprises a leak detector (242), said leak detector (242) comprising said first sensor.
9. The tightness test apparatus according to claim 8, wherein the leak detector (242) further comprises a vent valve for venting gas in the pressure vessel (1) and/or the target workpiece (3).
10. A method of inflating, as applied to the inflation device of any one of claims 1 to 5, the method comprising:
acquiring the free volume of the target workpiece (3), the free volume of the pressure vessel (1) and the target pressure of the gas to be filled into the target workpiece (3);
determining a first pressure of the gas filling the pressure vessel (1) as a function of the free volume of the target workpiece (3), the free volume of the pressure vessel (1) and the target pressure;
charging the pressure vessel (1) with a gas at a first pressure;
and filling the gas with the first pressure in the pressure container (1) into the target workpiece (3) to enable the target workpiece (3) to obtain the gas with the target pressure.
11. The inflation method according to claim 10, wherein the acquiring of the free volume of the target workpiece (3) comprises:
filling the pressure vessel (1) with a gas of a second preset pressure;
the pressure vessel (1) is communicated with the target workpiece (3), so that the gas with the second preset pressure is filled into the target workpiece (3) and balanced;
after the pressure between the pressure container (1) and the target workpiece (3) is balanced, detecting the balanced pressure;
-determining the free volume of the target workpiece (3) from the second preset pressure, the equilibrium pressure and the free volume of the pressure vessel (1).
12. A method of testing the air tightness, applied to the air tightness testing apparatus of any of claims 6 to 9, comprising:
the inflation method of claim 10 or 11;
after the step of filling the target workpiece (3) with the gas having the first pressure inside the pressure vessel (1), the method further comprises:
after the pressure between the pressure container (1) and the target workpiece (3) is balanced, the pressure difference and/or flow between the pressure container (1) and the target workpiece (3) is measured through a leakage detection assembly (24) so as to detect the air tightness of the target workpiece (3).
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|---|---|---|---|---|
| CN116465572A (en) * | 2023-06-20 | 2023-07-21 | 宁德时代新能源科技股份有限公司 | Battery detection equipment and method and device for detecting battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201532292U (en) * | 2009-09-11 | 2010-07-21 | 彭光正 | Pneumatic circuit of multifunctional gas-tightness detector |
| CN108627308A (en) * | 2018-06-29 | 2018-10-09 | 杭州固恒能源科技有限公司 | From high-pressure air source to the inflation method of workpiece, air charging system and differential pressure air-leakage detector |
| US20190033161A1 (en) * | 2017-07-31 | 2019-01-31 | Citic Dicastal Co., Ltd | Leak hole leak rate detection device and method |
| CN112985711A (en) * | 2021-05-08 | 2021-06-18 | 江苏时代新能源科技有限公司 | Air tightness detection device and method thereof |
-
2021
- 2021-10-20 CN CN202111223022.0A patent/CN115993215B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201532292U (en) * | 2009-09-11 | 2010-07-21 | 彭光正 | Pneumatic circuit of multifunctional gas-tightness detector |
| US20190033161A1 (en) * | 2017-07-31 | 2019-01-31 | Citic Dicastal Co., Ltd | Leak hole leak rate detection device and method |
| CN108627308A (en) * | 2018-06-29 | 2018-10-09 | 杭州固恒能源科技有限公司 | From high-pressure air source to the inflation method of workpiece, air charging system and differential pressure air-leakage detector |
| CN112985711A (en) * | 2021-05-08 | 2021-06-18 | 江苏时代新能源科技有限公司 | Air tightness detection device and method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116465572A (en) * | 2023-06-20 | 2023-07-21 | 宁德时代新能源科技股份有限公司 | Battery detection equipment and method and device for detecting battery |
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