CN216207382U - Inner container air tightness detection device - Google Patents

Abstract

The application discloses a liner airtightness detection device which comprises a liner support, a first sealing structure, an air pressure sensor and a first valve, wherein the first sealing structure is arranged on the liner support and is used for being connected with a first inlet of a liner and sealing the first inlet of the liner; the air pressure sensor is communicated with the through hole; the output end of the first valve is communicated with the through hole. This application embodiment can detect the gas tightness of inner bag through inner bag gas tightness detection device, when the gas tightness of inner bag can't reach the requirement, can in time scrap or restore the inner bag, and can not be used for the assembly of hydrogen storage cylinder with the inner bag that the gas tightness is unsatisfactory, avoid under the condition that detects the gas tightness of hydrogen storage cylinder inefficacy, can't judge whether the gas tightness of hydrogen storage cylinder's inner bag is inefficacy, thereby lead to whole hydrogen storage cylinder gas tightness to be inefficacy, cause the problem of the extravagant a large amount of cost.

Description

Inner container air tightness detection device

Technical Field

The application relates to the technical field of hydrogen storage containers, in particular to a liner airtightness detection device.

Background

With the development of fuel cell automobile technology, hydrogen storage cylinders for storing hydrogen are also receiving more and more attention. The nonmetal liner fiber fully-wound gas cylinder has the advantages of lighter weight, lower cost and higher mass hydrogen storage density, and is more and more widely applied. In order to prevent hydrogen gas leakage from occurring in the hydrogen storage cylinder, the gas tightness of the hydrogen storage cylinder is generally measured.

However, the overall gas tightness of the hydrogen storage cylinder is generally detected at present, and if the leakage condition of the hydrogen storage cylinder is detected, whether the gas tightness of the inner container of the hydrogen storage cylinder fails or not cannot be judged, so that the gas tightness of the entire hydrogen storage cylinder fails, and a great deal of cost waste is caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a liner gas tightness detection device, aims at solving under the circumstances that detects the gas tightness of hydrogen storage cylinder and became invalid, can't judge whether to be the gas tightness of hydrogen storage cylinder's liner and become invalid to lead to whole hydrogen storage cylinder gas tightness to become invalid, cause the extravagant problem in a large number of costs.

The embodiment of the application provides an inner bag gas tightness detection device, includes:

a liner support;

the first sealing structure is arranged on the liner support and is used for being connected with the first inlet of the liner and sealing the first inlet of the liner, and a through hole used for being communicated with the first inlet of the liner is formed in the first sealing structure;

the air pressure sensor is communicated with the through hole;

the output end of the first valve is communicated with the through hole.

Optionally, the liner airtightness detection device further comprises a first air pressure regulating valve, and an output end of the first air pressure regulating valve is communicated with an input end of the first valve.

Optionally, one end of the air pressure sensor is communicated with the output end of the first valve, so that the air pressure sensor is communicated with the through hole;

the other end of the air pressure sensor is communicated with the input end of a second valve, and the output end of the second valve is communicated with the outside.

Optionally, one side of the first sealing structure is provided with a first jack, and the other side of the first sealing structure is provided with the through hole, and the through hole is communicated with the first jack;

the inner container air tightness detection device further comprises a pushing assembly, the pushing assembly is opposite to the first insertion hole and comprises a pushing piece and a driving structure, the driving structure is installed on the inner container support, and the driving structure is connected with the pushing piece to drive the pushing piece to be close to or far away from the first sealing structure.

Optionally, the driving structure includes a control valve and a cylinder installed on the inner container support, the pushing member is a piston rod installed in the cylinder in a sliding manner, and the control valve is communicated with the cylinder to control a sliding direction of the piston rod, so that the piston rod is close to or far away from the first sealing structure.

Optionally, the liner airtightness detection device further comprises a second air pressure regulating valve, and an output end of the second air pressure regulating valve is communicated with the control valve; the input end of the second air pressure regulating valve and the input end of the first air pressure regulating valve are respectively communicated with an inflation pipeline.

Optionally, a plurality of mounting positions for mounting the driving structure are arranged on the inner container support, the mounting positions are sequentially distributed along a direction away from the first sealing structure, and the driving structure is detachably mounted on one of the mounting positions.

Optionally, a liner support structure is further slidably mounted on the liner support, and the liner support structure is opposite to the first jack; the pushing piece of the pushing assembly is used for being connected with the liner supporting structure so as to push the liner supporting structure to be close to or far away from the first sealing structure.

Optionally, the liner support structure is located between the pushing assembly and the first sealing structure, and the liner support structure extends along the direction of the pushing member toward the first sealing structure relative to the sliding direction of the liner bracket.

Optionally, the first sealing structure comprises a first valve body and a first valve seat, the first valve seat is mounted on the liner support, one side of the first valve seat is provided with the first jack, and the other side of the first valve seat is provided with a first mounting hole communicated with the first jack; the through hole is formed in the first valve body, and the first valve body is inserted into the first mounting hole so that the through hole is communicated with the first jack.

The inner container air tightness detection device provided by the embodiment of the application seals the first inlet of the inner container through the first sealing structure, so that the through hole of the first sealing structure is communicated with the first inlet of the inner container, and the through hole of the first sealing structure is communicated with the output ends of the air pressure sensor and the first valve. Therefore, the input end of the first valve can be communicated with the air pump, or the input end of the first valve is communicated with an external air charging device through an air charging pipeline, then the first valve is opened to charge the inner container, the air pressure value in the inner container is detected through the air pressure sensor, and the first valve can be closed after the air pressure value in the inner container reaches the first air pressure value. And then, after the preset time, detecting a second air pressure value in the inner container through the air pressure sensor, and determining the air tightness of the inner container according to the first air pressure value and the second air pressure value, thereby quickly completing the air tightness detection of the inner container. When the gas tightness of inner bag can't reach the requirement, can in time scrap or restore the inner bag, and can not be used for the assembly of hydrogen storage cylinder with the inner bag that the gas tightness is unsatisfactory, avoid detecting under the circumstances that the gas tightness of hydrogen storage cylinder became invalid, can't judge whether the gas tightness of hydrogen storage cylinder's inner bag became invalid to lead to whole hydrogen storage cylinder gas tightness to become invalid, cause the problem of the extravagant a large amount of costs.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of an embodiment of an inner container airtightness detection apparatus provided in the embodiment of the present application;

fig. 2 is a schematic view of an installation structure of a bladder support, a sealing valve and a pushing assembly according to an embodiment of the present disclosure;

FIG. 3 is a partial cross-sectional view of a first seal structure in accordance with an embodiment of the present disclosure in conjunction with a bladder, the cross-sectional view taken along a length of the bladder;

fig. 4 is a partial cross-sectional view of a second sealing structure provided in the embodiment of the present application, which is taken along a longitudinal direction of an inner container after being engaged with the inner container.

An inner container air tightness detection device 100; a liner support 110; a first seal structure 120; a first valve body 121; a through hole 1211; a first valve seat 122; a first socket 1221; a first mounting hole 1222; a first seal assembly 123; a first retaining ring 1231; a first seal ring 1232; a second seal assembly 124; a second collar 1233; a second seal 1234; a pushing assembly 130; a pusher 131; a drive structure 132; a cylinder barrel 1321; a control valve 1322; a mounting seat 1323; a fastener 1324; an air pressure sensor 140; a bladder support structure 150; a support base 151; a second sealing structure 152; a second insertion hole 153; a second valve body 154; a second valve seat 155; the second mounting hole 156; a first valve 161; a second valve 162; a first air pressure regulating valve 170; a second air pressure regulating valve 171; an inflation line 180; an inner container 200; a first interface section 210; a first inlet 211; a first mounting groove 212; a second inlet 213; a second interface portion 214; a second mounting groove 215.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the application provides an inner bag gas tightness detection device. The following are detailed below.

As shown in fig. 2 and 3, the inner container airtightness detection apparatus 100 includes an inner container support 110, and a first sealing structure 120 disposed on the inner container support 110, wherein the first sealing structure 120 is configured to be connected to the first inlet 211 of the inner container 200 and seal the first inlet 211 of the inner container 200, and the first sealing structure 120 is provided with a through hole 1211 configured to communicate with the first inlet 211 of the inner container 200. The liner support 110 is used to support the liner 200. When the inner container 200 is supported on the inner container support 110, the first sealing structure 120 is connected to the first inlet 211 of the inner container 200 and seals the first inlet 211 of the inner container 200, and at the same time, the through hole 1211 of the first sealing structure 120 is communicated with the first inlet 211 of the inner container 200.

As shown in fig. 1, the inner container airtightness detection apparatus 100 further includes an air pressure sensor 140 and a first valve 161, and the air pressure sensor 140 is in communication with the through hole 1211 of the first sealing structure 120. The output end of the first valve 161 communicates with the through hole 1211 of the first sealing structure 120.

The liner airtightness detection apparatus 100 in the embodiment of the present application seals the first inlet 211 of the liner 200 by the first sealing structure 120, so that the through hole 1211 of the first sealing structure 120 communicates with the first inlet 211 of the liner 200, and the through hole 1211 of the first sealing structure 120 communicates with the output ends of the air pressure sensor 140 and the first valve 161. Therefore, the input end of the first valve 161 can be communicated with the air pump, or the input end of the first valve 161 is communicated with an external air charging device through the air charging pipeline 180, then the first valve 161 is opened to charge air into the liner 200, the air pressure sensor 140 detects the air pressure value in the liner 200, and when the air pressure value in the liner 200 reaches the first air pressure value, the first valve 161 can be closed. At this time, the first inlet 211 of the inner container 200 is closed by the first valve 161, and the gas in the inner container 200 cannot leak out of the first valve 161.

After the first inlet 211 of the inner container 200 is closed by the first valve 161 for a preset time, the second air pressure value in the inner container 200 can be detected by the air pressure sensor 140, and the air tightness of the inner container 200 can be determined according to the first air pressure value and the second air pressure value, so that the air tightness detection of the inner container 200 can be completed quickly. When the air tightness of the inner container 200 can not meet the requirement, the inner container 200 can be scrapped or repaired in time, the inner container 200 with the air tightness not meeting the requirement can not be used for assembling the hydrogen storage cylinder, and the problem that the air tightness of the whole hydrogen storage cylinder fails and a large amount of cost is wasted due to the fact that whether the inner container 200 of the hydrogen storage cylinder cannot be judged to fail under the condition that the air tightness of the hydrogen storage cylinder fails is avoided.

It can be understood that, if the air tightness of the inner container 200 is poor and there is an air leakage, the air pressure value of the inner container 200 will decrease after a preset time, that is, the second air pressure value will be smaller than the first air pressure value. Therefore, in the embodiment of the present application, a difference between the first air pressure value and the second air pressure value may be calculated, and then the difference between the first air pressure value and the second air pressure value is compared with a preset threshold; if the difference value between the first air pressure value and the second air pressure value is smaller than or equal to the preset threshold value, it is determined that the inner container 200 is not air-leaked, and the air tightness of the inner container 200 is good; on the contrary, if the difference between the first air pressure value and the second air pressure value is greater than the preset threshold, the inner container 200 is in a gas leakage condition, and the air tightness of the inner container 200 is poor.

Or, the ratio of the first air pressure value to the second air pressure value can be calculated, and then the ratio of the first air pressure value to the second air pressure value is compared with a preset ratio; if the ratio of the first air pressure value to the second air pressure value is smaller than or equal to the preset ratio, the air tightness of the inner container 200 without air leakage of the inner container 200 is determined to be good; on the contrary, if the ratio of the first air pressure value to the second air pressure value is greater than the preset ratio, the inner container 200 is in a gas leakage condition, and the air tightness of the inner container 200 is poor.

Of course, instead of detecting the second air pressure value of the inner container 200, the leakage detection liquid may be directly applied to the surface of the inner container 200 after the air pressure value in the inner container 200 reaches the first air pressure value, and the airtightness of the inner container 200 may be determined according to the state of the leakage detection liquid. Wherein, whether the leakage detection liquid generates bubbles within a preset time can be judged; if not, determining that the inner container 200 is not air-leaked and the air tightness of the inner container 200 is good; on the contrary, the inner container 200 may be air-leaking, and the air-tightness of the inner container 200 is poor.

Alternatively, the leakage detection liquid may be a liquid that can react with the gas filled in the inner container 200 in color. For example: the gas filled into the inner container 200 can contain ammonia gas, and the leakage detection liquid is phenolphthalein solution. When the gas in the inner container 200 leaks, the leaked ammonia gas reacts with the leakage detection liquid, so that the leakage detection liquid turns red. At this time, whether the color of the leakage detection liquid changes within a preset time can be judged; if not, determining that the inner container 200 is not air-leaked and the air tightness of the inner container 200 is good; on the contrary, the inner container 200 may be air-leaking, and the air-tightness of the inner container 200 is poor.

As shown in fig. 1, the apparatus 100 for detecting airtightness of the inner container further comprises a first air pressure regulating valve 170, and an output end of the first air pressure regulating valve 170 is communicated with an input end of the first valve 161. Therefore, the input end of the first air pressure adjusting valve 170 can be communicated with the air pump, or the input end of the first air pressure adjusting valve 170 can be communicated with an external air charging device through the air charging pipeline 180, and then the first valve 161 is opened to charge air to the liner 200. Meanwhile, the pressure of the air passing through the first valve 161 is adjusted by the first air pressure adjusting valve 170, so as to improve the safety of the process of inflating the liner 200.

As shown in fig. 1, one end of the air pressure sensor 140 is communicated with the output end of the first valve 161, so that the air pressure sensor 140 is communicated with the through hole 1211 of the first sealing structure 120, and the air pressure sensor 140 can detect the air pressure value in the inner container 200. The other end of the air pressure sensor 140 communicates with an input end of a second valve 162, and an output end of the second valve 162 communicates with the outside. When the airtightness of the inner container 200 is detected, the second valve 162 may be closed to prevent the gas in the inner container 200 from leaking out of the second valve 162. After the airtightness of the inner container 200 is detected, the second valve 162 may be opened to discharge the high-pressure gas in the inner container 200 to the outside through the second valve 162, so as to separate the inner container 200 from the first sealing structure 120.

Specifically, the through hole 1211 of the first sealing structure 120 communicates with one end of the air pressure sensor 140 and the output end of the first valve 161, respectively. The other end of the air pressure sensor 140 communicates with an input end of the second valve 162, and an output end of the second valve 162 communicates with the outside. The input end of the first valve 161 is communicated with the output end of the first air pressure regulating valve 170, and the input end of the first air pressure regulating valve 170 is communicated with the air outlet of the charging pipeline 180. The inflation inlet of the inflation pipeline 180 is used for communicating with an air pump or an external inflation device.

In the embodiment of the present application, the first valve 161 and the second valve 162 are manual valves. The opening and closing of the first and second valves 161 and 162 may be manually controlled by a test person. Of course, the first valve 161 and the second valve 162 may be electric valves, and the opening and closing of the first valve 161 and the second valve 162 may be controlled by the controller in the inner container airtightness detection apparatus 100.

As shown in fig. 3, one side of the first sealing structure 120 is provided with a first insertion hole 1221, and the other side of the first sealing structure 120 is provided with a through hole 1211, and the through hole 1211 is communicated with the first insertion hole 1221. Correspondingly, the surface of the inner container 200 is convexly provided with a first interface portion 210, and the first inlet 211 is located at a free end of the first interface portion 210. By inserting the first interface portion 210 of the inner container 200 into the first insertion hole 1221, the first sealing structure 120 is connected to the first inlet 211 of the inner container 200 to seal the first inlet 211 of the inner container 200, and the through hole 1211 of the first sealing structure 120 is communicated with the first inlet 211.

As shown in fig. 1 and 2, a liner support structure 150 is further installed on the liner support 110, and the liner support structure 150 is opposite to the first insertion hole 1221 of the first sealing structure 120. The liner support structure 150 is used to support an end of the liner 200 away from the first inlet 211.

As shown in fig. 4, a second inlet 213 is disposed at an end of the inner container 200 away from the first inlet 211. The liner support structure 150 includes a support base 151 slidably mounted on the liner support 110, and a second sealing structure 152 mounted on the support base 151, the second sealing structure 152 being adapted to be coupled to a second inlet 213 of the liner 200 at an end thereof remote from the first inlet 211 and to seal the second inlet 213.

Specifically, one side of the second sealing structure 152 is opened with a second insertion hole 153. Correspondingly, the surface of the inner container 200 is convexly provided with a second interface part 214, and the second inlet 213 is located at the free end of the second interface part 214. By inserting the second port 214 of the inner container 200 into the second insertion hole 153, the second sealing structure 152 can be connected to the second inlet 213 of the inner container 200 to seal the second inlet 213 of the inner container 200.

As shown in fig. 1 and 2, the liner airtightness detecting apparatus 100 further includes a pushing assembly 130, the pushing assembly 130 includes a pushing member 131 and a driving structure 132, the driving structure 132 is mounted on the liner support 110, and the driving structure 132 is connected to the pushing member 131 to drive the pushing member 131 to approach or move away from the first sealing structure 120.

After the first interface portion 210 on the inner container 200 is inserted into the first insertion hole 1221, the driving structure 132 may be controlled to drive the pushing member 131 to approach the first sealing structure 120, so that the pushing member 131 is directly abutted against a side of the inner container 200 away from the first sealing structure 120 and applies a pushing force to the inner container 200, and a surface of the inner container 200 near the first interface portion 210 is attached to the first sealing structure 120 more tightly, thereby improving a sealing effect of the first sealing structure 120 on the first inlet 211 of the inner container 200, and avoiding separation of the first interface portion 210 of the inner container 200 from the first sealing structure 120 due to too large air pressure in the inner container 200.

Or, the liner support structure 150 is slidably mounted on the liner support 110, and the pushing member 131 of the pushing assembly 130 is used for abutting against the liner support structure 150 and applying a pushing force to the liner 200, so as to increase the pressing force between the second sealing structure 152 of the liner support structure 150 and the liner 200 and improve the sealing effect of the second sealing structure 152 on the second inlet. Meanwhile, the extrusion force between the first sealing structure 120 and the inner container 200 can be increased, and the sealing effect of the first sealing structure 120 on the first inlet 211 is improved.

It should be noted that the pushing member 131 of the pushing assembly 130 can be always connected to the inner container supporting structure 150; alternatively, the pusher 131 of the pushing assembly 130 is separated from the inner container support structure 150 when retracted, and the pusher 131 of the pushing assembly 130 abuts against the inner container support structure 150 when extended.

Wherein, liner support structure 150 is located between pushing assembly 130 and first sealing structure 120. The sliding direction of the liner support structure 150 relative to the liner support 110 extends in the direction of the pushing member 131 toward the first sealing structure 120, so that the pushing member 131 of the pushing assembly 130 can more stably push the liner support structure 150 to slide.

Specifically, the first sealing structure 120 is located at one end of the liner support 110 in the length direction. The pushing assembly 130 is located at the other end of the liner support 110 in the length direction. Bladder support structure 150 is located between push assembly 130 and first seal structure 120. The sliding direction of the liner supporting structure 150 relative to the liner support 110 is the same as the extension direction of the pushing piece 131. The first interface portion 210 of the inner container 200 is inserted into the first insertion hole 1221 of the first sealing structure 120, the second interface portion 214 of the inner container 200 is inserted into the second insertion hole 153 of the second sealing structure 152, so that the inner container 200 is supported on the inner container support 110, and the first sealing structure 120 seals the first inlet 211 and the second sealing structure 152 seals the second inlet 213.

After the airtightness of the inner container 200 is detected, the driving structure 132 may be controlled to drive the pushing member 131 to be away from the first sealing structure 120, so that the pushing member 131 is separated from the inner container 200 or the inner container supporting structure 150, thereby facilitating the first interface portion 210 of the inner container 200 to be pulled out from the first insertion hole 1221 of the first sealing structure 120, and the second interface portion 214 of the inner container 200 to be pulled out from the second insertion hole 153.

Wherein, the driving structure 132 can be made to drive the pushing member 131 to rotate, so that the pushing member 131 approaches or moves away from the first sealing structure 120. Alternatively, the driving structure 132 may be used to drive the pushing member 131 to slide, so that the pushing member 131 approaches or moves away from the first sealing structure 120.

In some embodiments, as shown in fig. 1 and 2, the driving structure 132 includes a control valve 1322 and a cylinder 1321 installed on the inner container support 110, the pushing member 131 is a piston rod slidably installed in the cylinder 1321, and the control valve 1322 communicates with the cylinder 1321 to control the sliding direction of the piston rod so that the piston rod is close to or away from the first sealing structure 120.

Wherein the sliding direction of the piston rod relative to the cylinder 1321 extends in a direction of the cylinder 1321 towards the control valve 1322, such that the piston rod can move closer to or away from the first sealing structure 120 when sliding within the cylinder 1321. The sliding direction of the piston rod relative to the cylinder 1321 may be parallel to or at a certain angle with the direction of the cylinder 1321 toward the control valve 1322, and only the piston rod needs to be close to the first sealing structure 120 to apply a pushing force toward the first sealing structure 120 to the liner 200.

The manner in which the control valve 1322 controls the piston rod to move closer to or away from the first sealing structure 120 may depend on the type of cylinder in which the piston rod and the cylinder 1321 are combined. For example: when the cylinder composed of the piston rod and the cylinder barrel 1321 is a double-acting cylinder, the interior of the cylinder barrel 1321 is divided into a rod chamber with the piston rod and a rodless chamber without the piston rod by the piston of the piston rod, the control valve 1322 is communicated with the rod chamber and the rodless chamber, and the rodless chamber is inflated by the control valve 1322 to push the piston rod to extend (the piston rod moves towards the first sealing structure 120); the rod chamber is inflated via the control valve 1322 to urge the piston rod to retract (piston rod moves away from the first seal structure 120).

Wherein the control valve 1322 is installed on the liner support 110. The control valve 1322 may be a solenoid valve, a manual valve, a pneumatic valve, etc., and need only be capable of controlling the piston rod toward or away from the first seal structure 120.

As shown in fig. 1, the inner container airtightness detection apparatus 100 further includes a second air pressure adjustment valve 171, and an output end of the second air pressure adjustment valve 171 is communicated with the control valve 1322. Accordingly, the input end of the second air pressure adjusting valve 171 may be communicated with the air pump, or the input end of the second air pressure adjusting valve 171 may be communicated with an external air charging device through the air charging line 180 to charge the cylinder 1321 with air through the control valve 1322 to control the extension or retraction of the piston rod. Meanwhile, the pressure of the air charged into the port through the control valve 1322 is adjusted by the second air pressure adjusting valve 171 to improve safety.

Wherein, the input end of the second air pressure adjusting valve 171 and the input end of the first air pressure adjusting valve 170 are respectively communicated with the air charging pipeline 180. Therefore, the air pressure filled in the liner 200 can be adjusted by the first air pressure adjusting valve 170 by connecting the air charging pipe 180 with an air pump or an external air charging device, and the air pressure filled in the cylinder 1321 can be adjusted by the second air pressure adjusting valve 171.

In other embodiments, the pushing assembly 130 is an electric cylinder, a hydraulic cylinder, a screw rotatably connected to the liner support 110, or the like.

In the embodiment of the present application, the inner container support 110 is provided with a plurality of mounting positions (not shown in the drawings) for mounting the driving structure 132, the mounting positions are sequentially distributed along a direction away from the first sealing structure 120, and the driving structure 132 is detachably mounted on one of the mounting positions.

It can be appreciated that since the plurality of mounting locations on the liner support 110 are sequentially distributed in a direction away from the first sealing structure 120, the distance between the driving structure 132 and the first sealing structure 120 is different when the driving structure 132 is mounted at different mounting locations. Therefore, the liner airtightness detection apparatus 100 can flexibly rotate the corresponding mounting position to mount the driving structure 132 according to the length of the liner 200, so that when the driving structure 132 drives the pushing member 131 to approach the first sealing structure 120, the pushing member 131 can abut against the liner 200 and apply a pushing force to the liner 200, and when the driving structure 132 drives the pushing member 131 to be away from the first sealing structure 120, the pushing member 131 can be separated from the liner 200, so that the liner 200 can be separated from the first sealing structure 120 and the liner support 110 can be taken down, thereby improving the application range of the liner airtightness detection apparatus 100.

Specifically, the inner container support 110 is provided with a plurality of first fixing holes (not shown), which are sequentially distributed along a direction away from the first sealing structure 120, and each first fixing hole is an installation position. The cylinder 1321 is mounted on the mounting seat 1323, and a second fixing hole (not shown) is formed in the mounting seat 1323. The driver structure 132 is removably mounted at the different mounting locations by corresponding the second securing holes to the different first securing holes and inserting the fasteners 1324 into the second securing holes and the corresponding first securing holes. The fastening component 1324 is a screw, a pin, etc., and is not limited herein.

In other embodiments, the pushing assembly 130 may not be provided. For example: the inner container 200 may be provided with a fixing portion, the first sealing structure 120 may be provided with a connecting structure, and after the first interface portion 210 of the inner container 200 is inserted into the first insertion hole 1221 to communicate the first inlet 211 of the first interface portion 210 with the through hole 1211 on the bottom surface of the first insertion hole 1221, the connecting structure of the first sealing structure 120 may be connected to the fixing portion of the inner container 200 to prevent the first sealing structure 120 from being separated from the first interface portion 210 of the inner container 200.

In the embodiment of the present application, as shown in fig. 3, a first seal assembly 123 is disposed on an inner circumferential surface of the first interface portion 210, and the first seal assembly 123 extends in a circumferential direction of the first interface portion 210 to form an annular structure. Specifically, the inner peripheral surface of the first connecting portion 210 is provided with a first mounting groove 212, and the first mounting groove 212 extends along the circumferential direction of the first connecting portion 210 to form an annular structure. The first sealing assembly 123 includes a first retaining ring 1231 and a first sealing ring 1232, and the first sealing ring 1232 is disposed in the first mounting groove 212 and distributed along the circumferential direction of the first interface portion 210. The first retaining rings 1231 are disposed in the first mounting groove 212 and distributed along the circumferential direction of the first connecting port portion 210. The first retaining ring 1231 is located on one side of the first sealing ring 1232 close to the first inlet 211, so as to limit the first sealing ring 1232.

As shown in fig. 3, the first sealing structure 120 includes a first valve body 121 and a first valve seat 122, the first valve seat 122 is mounted on the liner support 110, one side of the first valve seat 122 is provided with a first insertion hole 1221, and the other side of the first valve seat 122 is provided with a first mounting hole 1222 communicated with the first insertion hole 1221. The first valve element 121 is formed with a through hole 1211, and the first valve element 121 is inserted into the first mounting hole 1222 such that the through hole 1211 communicates with the first insertion hole 1221. The first sealing structure 120 is provided with two split structures of the first valve body 121 and the first valve seat 122, so that the first sealing structure 120 can be more conveniently installed on the liner support 110. Wherein the first valve body 121 is inserted into the first inlet 211 and is in sealing engagement with the first sealing ring 1232 to seal the first inlet 211.

As shown in fig. 4, a second seal assembly 124 is disposed on an inner circumferential surface of the second interface portion 214, and the second seal assembly 124 extends along a circumferential direction of the second interface portion 214 to form an annular structure. Specifically, the inner peripheral surface of the second connecting port 214 is provided with a second mounting groove 215, and the second mounting groove 215 extends along the circumferential direction of the second connecting port 214 to form an annular structure. The second sealing assembly 124 includes a second retaining ring 1233 and a second sealing ring 1234, and the second sealing ring 1234 is disposed in the second mounting groove 215 and distributed along the circumference of the second connecting port 214. The second retainers 1233 are disposed in the second mounting groove 215 and distributed along the circumferential direction of the second connecting port portion 214. The second baffle 1233 is located at a side of the second sealing ring 1234 close to the second inlet 213, so as to limit the second sealing ring 1234.

As shown in fig. 4, the second sealing structure 152 includes a second valve body 154 and a second valve seat 155, the second valve seat 155 is mounted on the liner support 110, one side of the second valve seat 155 is opened with a second insertion hole 153, and the other side of the second valve seat 155 is opened with a second mounting hole 156 communicated with the second insertion hole 153. The second valve body 154 is inserted into the second mounting hole 156 to form the second sealing structure 152. Wherein the second valve body 154 is inserted into the second inlet 213 and sealingly engages the second sealing ring 1234 to seal the second inlet 213.

The process of detecting the airtightness of the inner container 200 by the inner container airtightness detecting apparatus 100 will be described in detail below.

First, the first interface portion 210 of the inner container 200 is inserted into the first insertion hole 1221 of the first sealing structure 120, and the first inlet 211 of the inner container 200 communicates with the through hole 1211 of the first sealing structure 120. Meanwhile, the second interface portion 214 of the inner container 200 is inserted into the second insertion hole 153 of the second sealing structure 152.

The first seal 120 and the second seal 152 are then supported on the bladder support 110.

Then, the first valve 161 is kept open, and the inflation port of the inflation line 180 is opened, and the inflation port of the inflation line 180 is inflated by the air pump or an external inflation device. Meanwhile, the second air pressure regulating valve 171 regulates the air pressure input to the control valve 1322, and the control valve 1322 controls the piston rod to extend toward the first sealing structure 120, so that the piston rod abuts against the support seat 151 of the liner support structure 150 and applies a pushing force to the liner support structure 150, and the second sealing structure 152 of the liner support structure 150 seals the second inlet 213 of the liner 200. Meanwhile, the pushing force is transmitted to the inner container 200, so that the outer surface of the inner container 200 near the first inlet 211 is closely attached to the first sealing structure 120, thereby sealing the first inlet 211 on the first interface portion 210 of the inner container 200.

Thereafter, the first valve 161 is opened, the second valve 162 is closed, and the pressure of the gas introduced into the first valve 161 is adjusted by the first gas pressure adjusting valve 170 to inflate the inner container 200. Meanwhile, the air pressure sensor 140 detects the air pressure in the inner container 200, and when the air pressure in the inner container 200 reaches a first air pressure value, the first valve 161 is closed. After the liner airtightness detection device 100 is maintained for a preset time, the air pressure value of the air pressure sensor 140 (which is the second air pressure value in the liner 200) is obtained, and the airtightness of the liner 200 is determined according to the first air pressure value and the second air pressure value.

Finally, after the airtightness of the inner container 200 is detected, the second valve 162 is opened to discharge the gas in the inner container 200 to the outside. And the control valve 1322 controls the piston rod to retract, the first sealing structure 120 and the second sealing structure 152 are removed from the liner support 110, and the first connecting port portion 210 and the second connecting port portion 214 of the liner 200 are respectively taken out of the first insertion hole 1221 and the second insertion hole 153.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The liner airtightness detection device provided by the embodiment of the present application is described in detail above, and a specific example is applied in the description to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understand the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. A liner airtightness detection device is characterized by comprising:

a liner support;

the first sealing structure is arranged on the liner support and is used for being connected with the first inlet of the liner and sealing the first inlet of the liner, and a through hole used for being communicated with the first inlet of the liner is formed in the first sealing structure;

the air pressure sensor is communicated with the through hole;

the output end of the first valve is communicated with the through hole.

2. The liner airtightness detection apparatus according to claim 1, further comprising a first air pressure regulating valve, an output end of the first air pressure regulating valve being in communication with an input end of the first valve.

3. The liner airtightness detection apparatus according to claim 2, wherein one end of the air pressure sensor is in communication with an output end of the first valve, so that the air pressure sensor is in communication with the through hole;

the other end of the air pressure sensor is communicated with the input end of a second valve, and the output end of the second valve is communicated with the outside.

4. The liner airtightness detection device according to claim 2, wherein a first insertion hole is formed in one side of the first sealing structure, and the through hole is formed in the other side of the first sealing structure, and the through hole is communicated with the first insertion hole;

the inner container air tightness detection device further comprises a pushing assembly, the pushing assembly is opposite to the first insertion hole and comprises a pushing piece and a driving structure, the driving structure is installed on the inner container support, and the driving structure is connected with the pushing piece to drive the pushing piece to be close to or far away from the first sealing structure.

5. The liner airtightness detection apparatus according to claim 4, wherein the drive structure includes a control valve and a cylinder mounted on the liner support, the push member is a piston rod slidably mounted in the cylinder, and the control valve is communicated with the cylinder to control a sliding direction of the piston rod, so that the piston rod is close to or away from the first sealing structure.

6. The liner airtightness detection apparatus according to claim 5, further comprising a second air pressure regulating valve, an output end of which is in communication with the control valve; the input end of the second air pressure regulating valve and the input end of the first air pressure regulating valve are respectively communicated with an inflation pipeline.

7. The liner airtightness detection device according to any one of claims 4 to 6, wherein the liner support is provided with a plurality of mounting positions for mounting the driving structure, the mounting positions are sequentially distributed in a direction away from the first sealing structure, and the driving structure is detachably mounted on one of the mounting positions.

8. The liner airtightness detection device according to any one of claims 4 to 6, wherein a liner support structure is further slidably mounted on the liner support, and the liner support structure is opposite to the first insertion hole; the pushing piece of the pushing assembly is used for being connected with the liner supporting structure so as to push the liner supporting structure to be close to or far away from the first sealing structure.

9. The liner airtightness detection apparatus according to claim 8, wherein the liner support structure includes a support seat slidably mounted on the liner support, and a second sealing structure mounted on the support seat, and the second sealing structure is configured to be connected to a second inlet at an end of the liner far from the first inlet and seal the second inlet.

10. The liner airtightness detection device according to any one of claims 4 to 6, wherein the first sealing structure includes a first valve body and a first valve seat, the first valve seat is mounted on the liner support, the first insertion hole is formed in one side of the first valve seat, and a first mounting hole communicated with the first insertion hole is formed in the other side of the first valve seat; the through hole is formed in the first valve body, and the first valve body is inserted into the first mounting hole so that the through hole is communicated with the first jack.

Images