Air tightness detection device

Abstract

An air tightness detection device provided by the present application comprises a first module and a second module, the first module is provided with at least two barrier strips, the barrier strips are respectively located at two sides of the first module along the length direction of the air tightness detection device, each barrier strip comprises an abutting part, the abutting part is provided with a first locking surface, and the first locking surface is provided with a second locking surface. The first mold plate and the second mold plate can be buckled to form a sealed cavity, a locking block and a driving part are arranged on the side, away from the first mold plate, of the second mold plate, the locking block can move in the length direction of the air tightness detection device, and the side face, away from the second mold plate, of the locking block comprises a second locking face; the first locking face inclines relative to the movement direction of the locking block, the second locking face is parallel to the first locking face, the driving piece is used for driving the locking block to move so that the first locking face can abut against the second locking face, and the first locking face and the second locking face can be self-locked so that the first template and the second template can be locked and limited, the stability during buckling can be improved, and the locking efficiency can be improved. And the cost of the air tightness detection device is reduced.

Description

Technical Field

[0001] This application relates to the field of airtightness testing technology, and more specifically to an airtightness testing device. Background Technology

[0002] Air tightness testing devices typically consist of an upper mold and a lower mold. After the workpiece to be tested is placed in the lower mold, the upper mold is pressed down by a pressure cylinder until it engages with the lower mold. Continued pressure is applied to the upper mold to maintain a tight fit between the upper and lower molds, placing the workpiece within a sealed cavity. Air is then supplied to the cavity for air tightness testing. Current testing equipment suffers from the following problems: the pressure supplied to the upper mold by the pressure cylinder fluctuates, affecting the accuracy of the test structure; and the supply of air into the cavity during testing creates a significant reaction force on the upper mold, placing high demands on the strength of the air tightness testing device components and resulting in high equipment costs. Utility Model Content

[0003] In view of this, this application provides an airtightness testing device to improve the accuracy of airtightness testing.

[0004] This application provides an airtightness testing device, the airtightness testing device comprising:

[0005] The first module includes a lower mold and at least two stop bars, the stop bars being located on opposite sides of the lower mold periphery, each stop bar including an abutment portion having a first locking surface;

[0006] The second module includes an upper mold and a lower mold that can be engaged. The upper mold has at least two locking blocks and a driving member on the side away from the first module. The locking blocks and the stop bars are correspondingly arranged. The locking blocks are movable relative to the upper mold. The side of the locking block away from the second module includes a second locking surface. The first locking surface is inclined relative to the direction of movement of the locking block. The driving member is used to drive the locking block to move so that at least part of the first locking surface and the second locking surface abut.

[0007] A pressure cylinder is connected to the second module and is used to drive the second module to move toward the first module.

[0008] In this embodiment, the first and second modules achieve self-locking through a stop bar and a locking block. Specifically, when the driving cylinder moves the second module, the second module can move along the height direction of the airtightness detection device, causing the first and second modules to engage. The driving component further drives the locking block to move, causing the first and second locking surfaces to abut against each other, thereby locking the first and second modules. Then, the pressing cylinder can be released, and no more force is applied to the second module. According to the principle of friction self-locking, when the direction of the driving force line is within the friction angle of the object, no matter how large the driving force is, it cannot offset the friction force on the mechanism, and the mechanism cannot move. That is, the driving force does no work, thereby achieving the purpose of self-locking. In this embodiment, self-locking is achieved through the first and second locking surfaces. This embodiment uses inclined plane self-locking to fix the first and second modules. After locking, the pressing cylinder does not need to continuously apply force, resulting in good stability and accurate testing. Moreover, the force during locking is concentrated on the stop bar and the locking block, which reduces the strength requirements of other components of the gas detection device and reduces costs.

[0009] In one possible implementation, the stop bar includes a connecting portion that extends along the arrangement direction of the first module and the second module. One end of the connecting portion is connected to the abutment portion, and the other end is fixed to the side wall of the lower mold. The first locking surface is located on the side of the abutment portion near the second module, and the second locking surface is parallel to the first locking surface.

[0010] In one possible implementation, the second module has a mounting plate on the side away from the lower mold. A portion of the mounting plate protrudes along its length and has a clearance hole. A portion of the stop bar can pass through the clearance hole, such that the abutment and the lower mold are located on opposite sides of the mounting plate. The second module has a slide rail on the side away from the first module, and the locking block can slide along the slide rail to approach or move away from the stop bar.

[0011] In one possible implementation, the airtightness testing device includes a base plate and a guide post. The base plate is located at the bottom of the second module along the height direction. The guide post connects the base plate and the second module. The second module is slidable along the guide post. The first module is disposed on the base plate.

[0012] In one possible implementation, a portion of the mounting plate extends in the width direction and protrudes relative to the sidewall of the second module, the protruding portion being provided with a guide hole, the guide hole being sleeved with the guide post.

[0013] In one possible implementation, the base plate is provided with a groove, along which the first module can move.

[0014] In one possible implementation, the airtightness testing device includes a support plate located on the side of the second module away from the first module, the support plate being connected to the guide column, and the pressing cylinder being mounted on the support plate.

[0015] In one possible implementation, the stop bar is annular, the two ends of the abutment portion are connected to the connecting portion, and a portion of the locking block can pass through the stop bar.

[0016] In one possible implementation, the driving member and the locking block are arranged along the width direction, and the second module has a connecting plate that connects the driving member and the locking block. The driving member is capable of driving the locking block to move along the length direction.

[0017] In one possible implementation, the airtightness detection device includes a seal that is installed on the second module to improve the airtightness when the first module and the second module are engaged. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the results of an airtightness testing device provided in an embodiment of this application;

[0020] Figure 2 A cross-sectional view showing the engagement of the stop bar and the locking block in an embodiment of this application;

[0021] Figure 3 A schematic diagram of the structure of the first module and the second module in cooperation provided in the embodiments of this application;

[0022] Figure 4 for Figure 3 A partial schematic diagram of section I;

[0023] Figure 5 This is a schematic diagram of the structure of a mounting plate provided in an embodiment of this application;

[0024] Figure 6 A cross-sectional view showing the mating of the first module and the second module as provided in the embodiments of this application;

[0025] Figure 7 for Figure 6 A partial schematic diagram of section II;

[0026] Figure 8 A schematic diagram of the deformation of the seal provided in the embodiments of this application;

[0027] Figure 9 A cross-sectional view of the seal provided in the embodiments of this application;

[0028] Figure 10 This is a structural schematic diagram of a sealing element provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-First Module;

[0031] 11-Stop bar;

[0032] 111-Connecting part;

[0033] 112-butt part;

[0034] 113 - First locking surface;

[0035] 12-First mounting slot;

[0036] 13-Lower mold;

[0037] 2-Second Module;

[0038] 21-Locking block;

[0039] 211 - Second locking surface;

[0040] 22-Drive components;

[0041] 23-Slide rail;

[0042] 24-Skateboard;

[0043] 25 - Connecting plate;

[0044] 26 - Second mounting slot;

[0045] 27-upper mold;

[0046] 3-Base plate;

[0047] 31-Groove;

[0048] 4-Guide pillars;

[0049] 5-Support plate;

[0050] 6- Downward-pressing cylinder;

[0051] 7-Mounting plate;

[0052] 71 - Guide hole;

[0053] 72-Allowance hole;

[0054] 8-Seals;

[0055] 81-Support section;

[0056] 812 - Second arc surface;

[0057] 82-Protrusion;

[0058] 821 - First peak;

[0059] 822 - Second peak;

[0060] 823 - First arc surface;

[0061] 83 - First recessed part;

[0062] 84 - Second recessed portion;

[0063] X - Length direction;

[0064] Y-width direction;

[0065] Z-Height Direction. Detailed Implementation

[0066] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0067] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0068] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0069] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0070] like Figure 1As shown, this application provides an airtightness testing device, including a first module 1, a second module 2, and a pressing cylinder 6. The pressing cylinder 6 is connected to the second module 2 so that the first module 1 and the second module 2 can be interlocked to achieve airtightness testing of the dry chamber. Specifically, the workpiece to be tested can be placed between the first module 1 and the second module 2. After the first module 1 and the second module 2 are interlocked and pressed together, the device checks whether there is any gas leakage in the dry chamber. The first module 1 includes a lower mold 13, and the second module 2 includes an upper mold 27. At least one of the upper mold 27 and the lower mold 13 is provided with a mounting groove. The upper mold 27 and the lower mold 13 can be interlocked so that the workpiece to be tested can be placed in the mounting groove after the first testing module and the second testing module are interlocked.

[0071] The first module 1 is provided with at least two stop bars 11, which are located on opposite sides of the periphery of the lower mold 13. For example, the stop bars 11 are located on both sides of the first module 1 along the length X of the airtightness detection device. Each stop bar 11 includes a connecting portion 111, which has a first locking surface 113. The second module 2 is provided with at least two locking blocks 21 and a driving member 22 on the side away from the first module 1. The locking blocks 21 and the stop bars 11 are correspondingly arranged. The locking blocks 21 can cooperate with the stop bars 11 to achieve the locking of the first module 1 and the second module 2. Therefore, the number and position of the locking blocks 21 correspond to the stop bars 11. Multiple stop bars 11 can be symmetrically arranged on both sides of the first module 1, and the locking blocks 21 are correspondingly arranged on both sides of the second module 2. The locking blocks 21 and the stop bars 11 at different positions cooperate to achieve a self-locking function, improving the stability during locking.

[0072] The locking block 21 is movably mounted on the second module 2. Driven by the driving component 22, the locking block 21 can move along the length direction X of the airtightness detection device. The driving component 22 can be a cylinder or a motor, as long as it can drive the locking block 21 to cooperate with the stop bar 11. No specific restrictions are imposed here.

[0073] like Figure 2 As shown, the side of the locking block 21 facing away from the second module 2 includes a second locking surface 211. The first locking surface 113 is inclined relative to the movement direction of the locking block 21 at an acute angle. The second locking surface 211 and the first locking surface 113 are parallel. The driving member 22 is used to drive the locking block 21 to move so that the first locking surface 113 and the second locking surface 211 abut against each other. The first locking surface 113 and the second locking surface 211 can self-lock to lock and limit the first module 1 and the second module 2. The first locking surface 113 can be provided on the side of the abutment portion 112 near the locking block 21 to facilitate the abutment of the first locking surface 113 and the second locking surface 211.

[0074] like Figures 2 to 4As shown in the embodiment of this application, the first module 1 and the second module 2 achieve self-locking through the stop bar 11 and the locking block 21. Specifically, when the driving cylinder drives the second module 2 to move, the second module 2 can move along the height direction Z of the airtightness detection device, causing the first module 1 and the second module 2 to engage. The driving member 22 further drives the locking block 21 to move, causing the first locking surface 113 and the second locking surface 211 to abut against each other, thereby achieving the locking of the first module 1 and the second module 2. Then, the pressing cylinder 6 can be released, and no more force is applied to the second module 2. According to the principle of friction self-locking, when the direction of the driving force line is within the friction angle of the object, no matter how large the driving force is, it cannot offset the friction force on the mechanism, and the mechanism cannot move. That is, the driving force does no work, thereby achieving the purpose of self-locking. In this embodiment of the application, self-locking is achieved through the first locking surface 113 and the second locking surface 211. In existing technologies, airtightness testing devices employ a locking method that uses a cylinder to continuously apply downward pressure. However, due to fluctuations in cylinder pressure, a stable value cannot be maintained, affecting the accuracy of the test results. Furthermore, this method generates a significant reaction force on the upper mold 27, placing very high demands on the structural strength of the airtightness testing device and increasing costs. In contrast, this embodiment uses a self-locking mechanism with inclined planes to fix the first module 1 and the second module 2. After locking, the downward-pressing cylinder 6 does not require continuous force, resulting in good stability and accurate testing. Moreover, the locking force is concentrated on the stop bar 11 and the locking block 21, reducing the strength requirements on other components of the gas detection device and lowering costs.

[0075] like Figure 4 As shown, in one possible implementation, the baffle 11 includes a connecting portion 111, which extends along the arrangement direction of the first module 1 and the second module 2. For example, the connecting portion 111 is installed on the side wall of the first module 1 and extends in a direction close to the second module 2. One end of the connecting portion 111 is connected to the abutting portion 112, and the other end of the connecting portion 111 is fixed to the side wall of the lower mold 13. The abutting portion 112 is located at the end of the connecting portion 111 close to the second module 2, and the first locking surface 113 is located on the side of the abutting portion 112 close to the second module 2.

[0076] The connecting part 111 is used to connect and support the abutment part 112. One end of the connecting part 111 is connected to the first module 1, and the other end of the connecting part 111 is connected to the abutment part 112. By setting the connecting part 111 to an appropriate shape, the abutment part 112 can be installed in a preset position to facilitate the engagement of the abutment part 112 and the locking block 21. The connecting part 111 protrudes relative to the first module 1 along the height direction Z of the airtightness testing device. When the first module 1 and the second module 2 are fastened together, the connecting part 111 can protrude relative to the top of the second module 2 along the height direction Z of the airtightness testing device. The abutting part 112 is located at the position where the connecting part 111 protrudes relative to the second module 2. The locking block 21 can be located on the side of the second module 2 away from the first module 1, that is, the locking block 21 can be located on the top of the second module 2. Therefore, the locking block 21 and the abutting part 112 cooperate with each other to make the first locking surface 113 and the second locking surface 211 abut together, thereby realizing the fastening and locking of the first module 1 and the second module 2.

[0077] like Figure 4 As shown, in one possible implementation, the baffle 11 is annular, and the two ends of the abutment portion 112 are respectively provided with connecting portions 111, and at least a portion of the locking block 21 can pass through the baffle 11.

[0078] The stop bar 11 may include multiple connecting portions 111, which are respectively disposed at both ends of the abutment portion 112. The connecting portions 111 connected to both ends of the abutment portion 112 can be further connected to each other through the connecting portions 111, thereby forming a ring shape with the stop bar 11 and improving the mechanical strength of the stop bar 11. After the first module 1 and the second module 2 are engaged, the driving member 22 drives the locking block 21. A portion of the locking block 21 can extend into the interior of the stop bar 11, and the first locking surface 113 and the second locking surface 211 abut against each other, thereby achieving self-locking.

[0079] like Figure 4 As shown, in one possible implementation, the second module 2 has a slide rail 23 and a slide plate 24 on the side away from the first module 1. The slide rail 23 has a guide groove, the slide plate 24 is installed in the guide groove, and the locking block 21 is installed on the slide plate 24. The slide rail 23 can be respectively arranged on both sides of the slide plate 24, so that the slide rail 23 provides support from both sides of the slide plate 24, improving the stability of the slide plate 24 when sliding. The locking block 21 can be fixedly installed on the slide plate 24, or the locking block 21 can be integrally formed with the slide plate 24. The locking block 21 can slide with the slide plate 24, so that the locking block 21 approaches the stop strip 11 and cooperates with the stop strip 11, or moves away from the stop strip 11 and releases the cooperation between the locking block 21 and the stop strip 11.

[0080] like Figure 1As shown, in one possible implementation, the airtightness testing device includes a base plate 3 and a guide post 4. The base plate 3 is located at the bottom of the second module 2 along the height direction Z. The guide post 4 connects the base plate 3 and the second module 2. The second module 2 can slide along the guide post 4. The first module 1 is mounted on the base plate 3.

[0081] The base plate 3 provides support for the entire airtightness testing device. The first module 1 can be mounted on the base plate 3, and the second module 2 is slidably connected to the guide post 4. A pressing cylinder 6 can be positioned on top of the guide post 4. The pressing cylinder 6 drives the second module 2 to move along the guide post 4, and the second module 2 can move along the guide post 4 in the height direction Z of the airtightness testing device to move closer to or further away from the first module 1. In this embodiment, the first module 1 and the second module 2 are self-locking via a first inclined plane and a second inclined plane. Therefore, the strength requirement for the guide post 4 is lower, allowing for a reduction in the size of the guide post 4 and lowering the cost of the airtightness testing device.

[0082] like Figure 1 and Figure 4 As shown, in one possible implementation, a mounting plate 7 is provided on the side of the second module 2 away from the first module 1, that is, on the side of the second module 2 away from the lower mold 13. A portion of the mounting plate 7 extends along the length direction X and protrudes relative to the side wall of the second module 2. The protruding portion is provided with a clearance hole 72, and a portion of the stop bar 11 can pass through the clearance hole 72, so that the abutment portion 112 and the lower mold 13 are located on both sides of the mounting plate 7, respectively. When the first module 1 and the second module 2 are engaged, the stop bar 11 can pass through the clearance hole 72 and protrude relative to the mounting plate 7. The locking block 21 can pass through the portion of the stop bar 11 that protrudes relative to the mounting plate 7. The locking block 21 and the abutment portion 112 cooperate to make the first locking surface 113 and the second locking surface 211 abut, thereby locking the first module 1 and the second module 2. The portion of the locking block 21 that passes through the stop strip 11 can abut against the mounting plate 7 along the height direction Z of the airtightness testing device. The mounting plate 7 can support the locking block 21, thereby improving the stability during locking. In this embodiment, the first module 1 and the second module 2 are self-locking through the first and second inclined surfaces. Therefore, the strength requirement for the mounting plate 7 is relatively low, which can reduce the thickness of the mounting plate 7 and lower the cost of the airtightness testing device.

[0083] like Figure 3As shown, in one possible implementation, a portion of the mounting plate 7 extends along the width direction Y of the airtightness testing device and protrudes relative to the side wall of the second module 2. The protruding portion is provided with a guide hole 71, which is sleeved with a guide post 4. The mounting plate 7 is slidably connected to the guide post 4 through the guide hole 71, which guides the movement of the mounting plate. Multiple guide holes 71 can be provided on the same side of the mounting plate 7 along the width direction Y of the airtightness testing device, allowing the mounting plate 7 to simultaneously engage with multiple guide posts 4, thereby improving the stability of the mounting plate 7 during movement. Because the mounting plate 7 is interconnected with the second module 2, the mounting plate 7 can drive the second module 2 to move synchronously during movement.

[0084] like Figure 1 As shown, in one possible implementation, the base plate 3 is provided with a slide groove 31, along which the first module 1 can move. The slide groove 31 can extend along the length direction X or the width direction Y of the airtightness testing device, allowing the first module 1 to move along the slide groove 31 to a position where its projection in the height direction Z of the airtightness testing device does not coincide with that of the second module 2, so that the second module 2 does not obstruct the first module 1, facilitating the placement of the workpiece to be tested on the first module 1. The first module 1 can load the workpiece to be tested and move to the bottom of the second module 2. The second module 2 further moves along the height direction Z of the airtightness testing device, gradually approaching the first module 1 and engaging with it.

[0085] like Figure 1 As shown, in one possible implementation, the airtightness testing device includes a support plate 5, located on the side of the second module 2 away from the first module 1. The support plate 5 is connected to a guide post 4, with the support plate 5 at the end of the guide post 4 away from the base plate 3. One end of the guide post 4 is connected to the base plate 3, and the other end of the guide post 4 is connected to the support plate 5, which can improve the stability of the guide post 4. A pressing cylinder 6 can be located on the side of the support plate 5 away from the second module 2. An opening can be pre-set on the support plate 5 so that the push rod of the pressing cylinder 6 can pass through the opening and connect to the second module 2.

[0086] like Figure 4As shown, in one possible implementation, the driving member 22 and the locking block 21 are arranged along the width direction Y. The second module 2 has a connecting plate 25, which connects the driving member 22 and the locking block 21. The driving member 22 can drive the locking block 21 to move along the length direction X. In order to leave room for the movement of the locking block 21 at the top of the second module 2, the arrangement direction of the driving member 22 and the locking block 21 is perpendicular to the direction of movement of the locking block 21. This can reduce the space occupied by the locking block 21 and the driving member 22 in the length direction X of the airtightness testing device, and make full use of the space in the width direction Y of the airtightness testing device. Especially when locking blocks 21 are provided on both sides of the second module 2, this arrangement can make reasonable use of space, reduce the size of the airtightness testing device in the length direction X, and help to reduce the overall volume of the airtightness testing device. The locking block 21 can be positioned at the middle of the top of the second module 2 in the width direction Y of the airtightness detection device. The driving components 22 for driving the two locking blocks 21 can be spaced apart along the width direction Y of the airtightness detection device, or the two driving components 22 can be positioned on the same side of the locking block 21 along the width direction Y of the airtightness detection device.

[0087] like Figure 6 and Figure 7 As shown, in one possible embodiment, the airtightness testing device includes a first module 1, a second module 2, and a sealing element 8. The first module 1 and the second module 2 can be interlocked to form a sealed cavity. The first module 1 has a first mounting groove 12 on the side near the second module 2, and the second module 2 has a second mounting groove 26 on the side near the first module 1. The sealing element includes a support portion 81 and a protrusion 82. The support portion 81 is mounted in the second mounting groove 26. When the first module 1 and the second module 2 are interlocked, the protrusion 82 can extend into the first mounting groove 12 and abut against the top wall and side wall of the first mounting groove 12 respectively, for sealing the sealed cavity.

[0088] like Figure 8 As shown, in one possible implementation, the width of the second mounting groove 26 gradually decreases along the direction approaching the first module 1. The width of the second mounting groove 26 refers to its radial dimension in relation to the seal 8. The shape of the second mounting groove 26 is adapted to the shape of the support portion 81, which can reduce the possibility of the seal 8 disengaging from the second mounting groove 26 when the first module 1 and the second module 2 are opened and closed, thereby improving the stability of the seal 8 installation.

[0089] like Figure 9As shown, this application embodiment provides a sealing element 8, which is capable of elastic deformation. The sealing element 8 includes a support portion 81 and a protrusion 82. The support portion 81 supports the protrusion 82 and can also be used to connect with equipment to achieve overall installation and fixation of the sealing element 8. Along the thickness direction of the sealing element 8, the radial dimension of the support portion 81 gradually decreases, that is, the top width of the support portion 81 is smaller than its bottom width. The width refers to the radial dimension of the cross-section of the support portion 81 along the thickness direction of the sealing element 8. The top of the support portion 81 is the end of the support portion 81 closest to the protrusion 82, and the bottom of the support portion 81 is the end of the support portion 81 furthest from the protrusion 82. The cross-section of the support portion 81 along the thickness direction of the sealing element 8 can be trapezoidal or triangular, etc. The bottom width of the support portion 81 is greater than the top width of the support portion 81, which can improve the stability of the support portion 81 during installation.

[0090] like Figure 9 As shown, the protrusion 82 and the support 81 are connected. The protrusion 82 includes a first protrusion peak 821 and a second protrusion peak 822. The protrusion 82 is disposed on the side of the support 81 with a relatively smaller radial dimension of the seal 8. The protrusion 82 protrudes along the thickness direction of the seal 8, and the first protrusion peak 821 and the second protrusion peak 822 are arranged radially along the seal 8. The protrusion 82 is used to abut against other devices to achieve a sealing effect.

[0091] The sealing element 8 provided in this application embodiment can be used in an airtightness testing device. The airtightness testing device has a sealed cavity for accommodating the workpiece to be tested. The sealed cavity can be formed by the snap-fitting of the first module 1 and the second module 2. Due to the influence of machining accuracy, it is difficult to achieve good airtightness by directly snapping the first module 1 and the second module 2 together. Therefore, setting an elastic sealing element 8 can achieve a good sealing effect, especially when the first module 1 and the second module 2 need to be frequently opened and closed. The sealing element 8 provided in this application embodiment can achieve a good sealing effect when the first module 1 and the second module 2 are snapped together. The material of the sealing element 8 can be elastic materials such as rubber, plastic, or silicone, and no specific limitation is made here. Specifically, the support part 81 can be fixedly installed in the first mounting groove 12 of the first module 1. When the second module 2 approaches and snaps together with the first module 1, the protrusion 82 can abut against the second module 2 and undergo elastic deformation, closing the gap between the first module 1 and the second module 2, thereby achieving a sealing effect. The protrusion 82 provided in this application embodiment includes a first protrusion peak 821 and a second protrusion peak 822. The first protrusion peak 821 and the second protrusion peak 822 can respectively abut against the mating components, thereby achieving a sealing effect. The sealing function can be achieved as long as either the first protrusion peak 821 or the second protrusion peak 822 is effective. Therefore, the sealing element 8 provided in this application has good reliability. Furthermore, the bottom width of the support portion 81 is greater than the top width, which reduces the possibility of the support portion 81 disengaging from the first mounting groove 12 along the thickness direction of the sealing element 8. This reduces the risk of the sealing element 8 being lifted and detached when the first module 1 and the second module 2 are separated, improving the stability of the sealing element 8 installation.

[0092] The sealing element 8 provided in this application embodiment can be used for components or equipment that need to be sealed, and no specific limitations are made here. The above embodiment is described with the sealing element 8 installed in the airtightness detection device as an example. It has similar principles and effects when used in other devices, and will not be described in detail here.

[0093] like Figure 9 As shown, in one possible embodiment, the seal 8 has a first recess 83 located at the junction of the protrusion 82 and the support 81, and the first recess 83 is recessed radially along the seal 8.

[0094] The first recess 83 provides deformation space for the protrusion 82 when the seal 8 is compressed. The support 81, positioned in the mounting groove, is not directly compressed by the equipment; therefore, it does not deform or deforms only slightly when the seal 8 is compressed. The protrusion 82, however, abuts against the equipment component to achieve a sealing function, thus undergoing relatively large deformation. After compression, the protrusion 82 decreases in thickness direction and increases in radial direction, allowing it to expand towards the area of ​​the first recess 83, thus deforming smoothly and facilitating contact with the equipment to achieve a sealing function. When the equipment mating with the protrusion 82 has a groove, the protrusion 82 can not only abut against the top wall of the groove but also deform to abut against the side wall, increasing the contact area between the protrusion 82 and the equipment and improving sealing reliability.

[0095] like Figure 9 As shown, in one possible embodiment, the first protrusion 821 and the second protrusion 822 are connected to each other radially along the seal 8, and a second recess 84 is provided between the first protrusion 821 and the second protrusion 822, the second recess 84 being recessed along the thickness direction of the seal 8. The ends of the first protrusion 821 and the second protrusion 822 connected to the support 81 are connected to each other, and the interconnection of the first protrusion 821 and the second protrusion 822 can improve the overall structural strength and connection stability of the protrusion 82. When the first protrusion 821 and the second protrusion 822 come into contact with the equipment, the first protrusion 821 and the second protrusion 822 are compressed and deformed, and the second recess 84 can provide deformation space.

[0096] like Figure 9 As shown, in one possible implementation, the first protrusion 821 is inclined in a direction away from the second protrusion 822, and the second protrusion 822 is inclined in a direction away from the first protrusion 821. The direction of action of the component on the seal 8 is usually along the thickness direction of the workpiece. When the protrusion 82 is squeezed, the first protrusion 821 and the second protrusion 822, due to their inclination angle, will shift in a direction away from each other, thereby facilitating the contact between the first protrusion 821 and the second protrusion 822 with the mating component to form a seal. For example, after the first protrusion 821 shifts, it can simultaneously contact the top wall of the inner wall of the second mounting groove 26, forming at least two contact positions, which is equivalent to forming two seals. Similarly, the second protrusion 822 can also form at least two seals. Therefore, the seal 8 can form multiple seals, improving the stability of the seal.

[0097] like Figure 9As shown, in one possible implementation, the ends of the first protrusion 821 and the second protrusion 822 away from the support portion 81 have a first arcuate surface 823. The first arcuate surface 823 is a region or chamfered region of the arcuate surface at the end of the first protrusion 821 or the second protrusion 822. The device is usually provided with a structure that mates with the protrusion 82, for example, the device is provided with a groove that mates with the protrusion 82. The first arcuate surface 823 can contact two surfaces of the device simultaneously. For example, the groove has a top wall and side walls that are perpendicular to each other. When the first protrusion 821 is compressed, the first arcuate surface 823 can simultaneously abut against the side wall and top wall of the groove to form two seals, thereby enhancing the sealing effect of the protrusion 82. The second protrusion 822 also has a first arcuate surface 823, so it has the same effect and will not be described further here. Furthermore, if the first protrusion 821 and the second protrusion 822 are set as squares, the sharp corners of the squares are relatively weak, making them easily damaged under pressure. Therefore, the first arc surface 823 can reduce stress concentration, reduce the possibility of the first protrusion 821 and the second protrusion 822 being damaged under pressure, and improve the overall strength of the protrusion 82.

[0098] like Figure 9 As shown, in one possible implementation, the edge of the support portion 81 is provided with a second arc surface 812.

[0099] The support portion 81 can be installed in a pre-set mounting groove of the equipment, so that the seal 8 is installed and fixed as a whole. The edge of the support portion 81 has a second arc surface 812. For example, when the cross-section of the support portion 81 is trapezoidal, the four corners are provided with the second arc surface 812. The support portion 81 needs to be compressed and deformed to a certain extent during installation. The second arc surface 812 facilitates the placement of the support portion 81 in the mounting groove and reduces the risk of the support portion 81 being scratched or damaged during installation. Secondly, the second arc surface 812 can provide better pressure distribution, reduce the deformation of the high-pressure area of ​​the support portion 81 when it is under pressure, improve the stability of the support portion 81 installation, and reduce the risk of the seal 8 being squeezed out of the mounting groove during use.

[0100] like Figure 9 and Figure 10 As shown, in one possible embodiment, the seal 8 is annular, with the support portion 81 and the protrusion 82 extending circumferentially along the seal 8. The annular seal 8 can contact and engage with the equipment to form a closed sealing area, achieving a sealing effect. The protrusion 82 is stacked with the support portion 81, and the protrusion 82 and the support portion 81 can also be correspondingly annular. The first protrusion peak 821 and the second protrusion peak 822 can be parallel to each other, with the first protrusion peak 821 located outside the second protrusion peak 822. The first protrusion peak 821 and the second protrusion peak 822 are similar to two concentric circles, which can provide multiple sealing functions and improve the stability of the seal.

[0101] In one possible implementation, the density of the seal 8 can be 7 × 10⁻⁶. -7 kg / mm 3 ~8×10 -7 kg / mm 3 The Young's modulus can be 6MPa to 8MPa, and the Poisson's ratio can be 0.3 to 0.5. The specific values ​​can be achieved by selecting appropriate materials according to specific application requirements, thereby meeting the mechanical properties required by the seal and facilitating the improvement of the mechanical properties of the seal and the stability of the tooling.

[0102] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this application. The above description is only a preferred embodiment of this application, but this application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of this application, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, should be within the protection scope of this application.

Claims

1. An airtightness testing device, characterized in that, The airtightness detection device includes: The first module includes a lower mold and at least two stop bars, the stop bars being located on opposite sides of the lower mold periphery, each stop bar including an abutment portion having a first locking surface; The second module includes an upper mold and a lower mold that can be engaged. The upper mold has at least two locking blocks and a driving member on the side away from the first module. The locking blocks and the stop bars are correspondingly arranged. The locking blocks are movable relative to the upper mold. The side of the locking block away from the second module includes a second locking surface. The first locking surface is inclined relative to the direction of movement of the locking block. The driving member is used to drive the locking block to move so that at least part of the first locking surface and the second locking surface abut. A pressure cylinder is connected to the second module and is used to drive the second module to move toward the first module.

2. The airtightness testing device according to claim 1, characterized in that, The stop bar includes a connecting portion that extends along the arrangement direction of the first module and the second module. One end of the connecting portion is connected to the abutment portion, and the other end is fixed to the side wall of the lower mold. The first locking surface is located on the side of the abutment portion near the second module, and the second locking surface is parallel to the first locking surface.

3. The airtightness testing device according to claim 1, characterized in that, The second module has a mounting plate on the side away from the lower mold. A portion of the mounting plate protrudes along its length and has a clearance hole. A portion of the stop bar can pass through the clearance hole, so that the abutment and the lower mold are located on opposite sides of the mounting plate. The second module has a slide rail on the side away from the first module, and the locking block can slide along the slide rail to move closer to or away from the stop bar.

4. The airtightness testing device according to claim 3, characterized in that, The airtightness testing device includes a base plate and a guide column. The base plate is located at the bottom of the second module along the height direction. The guide column connects the base plate and the second module. The second module can slide along the guide column. The first module is disposed on the base plate.

5. The airtightness testing device according to claim 4, characterized in that, A portion of the mounting plate extends along the width direction and protrudes relative to the side wall of the second module. The protruding portion is provided with a guide hole, which is sleeved with the guide post.

6. The airtightness testing device according to claim 5, characterized in that, The base plate is provided with a sliding groove, and the first module can move along the sliding groove.

7. The airtightness testing device according to claim 5, characterized in that, The airtightness testing device includes a support plate located on the side of the second module away from the first module. The support plate is connected to the guide column, and the pressure cylinder is mounted on the support plate.

8. The airtightness testing device according to claim 2, characterized in that, The stop bar is ring-shaped, and the two ends of the abutment portion are connected to the connecting portion. The locking block portion can pass through the stop bar.

9. The airtightness testing device according to claim 1, characterized in that, The driving component and the locking block are arranged along the width direction. The second module has a connecting plate that connects the driving component and the locking block. The driving component can drive the locking block to move along the length direction.

10. The airtightness testing device according to any one of claims 1 to 9, characterized in that, The airtightness testing device includes a sealing element, which is installed on the second module to improve the airtightness when the first module and the second module are engaged.

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