Plug structure
By designing a plug structure that includes a base plate, a balancing module, and a gas-blocking module, and utilizing the lever principle and elastic buffer block, the problem of inaccurate detection caused by tilting during gas sealing testing of liquid tanks was solved. This achieved workpiece stability and detection accuracy, and extended the service life of the equipment.
Patent Information
- Application Number
- CN202423311143.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During the gas tightness test of the liquid collection tank, the unreasonable design of the plug structure caused the liquid collection tank to tilt and rise during the test, resulting in pores and gaps between the tank and the testing equipment, which affected the accuracy of the test.
A plug structure is designed, including a base plate, a balancing module, and an air-blocking module. The lever principle is used to apply pressure to both sides of the workpiece. The workpiece is kept stable and tilted by the cooperation of the balancing module and the air-blocking module. The elastic buffer block reduces damage to the workpiece.
It effectively maintains the balance of the workpiece, avoids tilting, ensures the accuracy of pore sealing test, reduces damage to the workpiece, and extends the service life of the plug structure.
Smart Images
Figure CN223664172U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of air tightness detection, in particular to a plug structure. BACKGROUND
[0002] The liquid accumulation tank is an important component in the negative pressure wound therapy (NPWT), and the sealing performance of the liquid accumulation tank is one of the important factors affecting the normal implementation of the NPWT. When the gas sealing performance of the liquid accumulation tank is insufficient, the pressure sensor of the NPWT system cannot obtain the accurate pressure of the closed wound, so that the NPWT system cannot exert the accurate negative pressure on the closed wound, and the closed wound cannot be treated well, and in severe cases, the NPWT system cannot operate normally. Therefore, the gas sealing performance of the liquid accumulation tank needs to be strictly detected in the production process of the liquid accumulation tank.
[0003] However, since the liquid accumulation tank is provided with air holes on two sides, when the liquid accumulation tank is pressed to block one side of the air hole to detect the air tightness of the liquid accumulation tank, the liquid accumulation tank will be tilted due to the pressing problem, so that a gap will be generated between the air hole and the air tightness detection equipment, and thus the detection will be inaccurate. CONTENT OF THE UTILITY MODEL
[0004] In order to solve the above technical problems, the present application provides the following technical solutions:
[0005] The plug structure provided by the present application comprises a substrate, a balance module and a gas blocking module mounted on the same side of the substrate, and the balance module and the gas blocking module are arranged at two ends of the substrate in the maximum length direction.
[0006] In one embodiment, the balance module comprises a stand and an elastic buffer block, and the two ends of the stand are connected to the substrate and the buffer block.
[0007] In one embodiment, the buffer block is an arc surface relative to the other side of the stand.
[0008] In one embodiment, the buffer block is spherical.
[0009] In one embodiment, the gas blocking module is provided with an elastic pressure head block at one end away from the substrate.
[0010] In one embodiment, the balance module and the gas blocking module are perpendicular to the substrate.
[0011] In one embodiment, a backing plate is further arranged between the gas blocking module and the substrate.
[0012] In one embodiment, the lowest point of the gas blocking module in the vertical direction is lower than the lowest point of the balance module in the vertical direction.
[0013] In one embodiment, the height difference between the air blocking module and the balancing module is in the range of 1-5mm.
[0014] The present application has at least the following advantages:
[0015] In the present application, a force point is added by the balancing module when the air blocking mechanism is pressing the workpiece. The pressure is applied on two points on the same surface of the workpiece, and the two force points are located on both sides of the air hole on the other surface of the workpiece. The air hole on the other surface of the workpiece is used as a fulcrum to keep the position of the workpiece stable and prevent the workpiece from tilting.
[0016] In addition, the balancing module and the air blocking module are arranged on the base plate in the maximum length direction. The distance between the air blocking module and the fulcrum is fixed. The larger the distance between the balancing module and the air blocking module, the larger the force arm of the balancing module to the fulcrum. Since the air blocking module needs to press the workpiece to apply a larger pressure to ensure the closure of the air hole, under the premise that the torque of the air blocking module to the workpiece is fixed, based on the lever principle, the length of the force arm of the balancing module to the fulcrum is as long as possible in the present application. Then, the pressure applied by the balancing module to the workpiece is relatively smaller than the pressure applied by the air blocking module to the workpiece, which can ensure that the torque of the balancing module and the air blocking module to the workpiece is matched, that is, the workpiece is effectively balanced, and damage to the workpiece caused by excessive force applied by the balancing module to the workpiece can be avoided. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The structure schematic diagram of the plug structure provided by one embodiment of the present application is shown in the first perspective view.
[0018] Figure 2 The structure schematic diagram of the plug structure provided by one embodiment of the present application is shown in the second perspective view.
[0019] Figure 3 The structure schematic diagram of the plug structure provided by one embodiment of the present application is shown in the third perspective view.
[0020] Figure 4 The structure schematic diagram of the plug structure provided by the present application is shown in the third perspective view.
[0021] REFERENCE NUMERALS:
[0022] 21, base plate; 22, balancing module; 23, air blocking module; 24, backing plate;
[0023] 221, stand; 222, buffer block;
[0024] 231, pressure head block.
[0025] 3, workpiece;
[0026] 31, upper air hole; 32, lower air hole. DETAILED DESCRIPTION
[0027] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the detailed description of the specific embodiments of the present application is made below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.
[0028] In the description of the present application, it should be understood that if there are terms such as "length", "width", "thickness", "upper", "lower", "vertical", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. These terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0029] In addition, if there are terms such as "first", "second", "third", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" can be explicitly or implicitly included at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0030] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0031] In the present application, unless otherwise explicitly specified and limited, if there is a description such as "on" or "under" or similar description of the first feature to the second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0032] It should be noted that if an element is referred to as "fixed to" or "provided with" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.
[0033] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0034] Referring to Figure 4 , the workpiece 3 to be implemented in the present application is a liquid accumulation tank, and the workpiece 3 is provided with an upper air hole 31 and a lower air hole 32 on the opposite surfaces. The lower air hole 32 is relatively protruded from the lower surface of the workpiece 3 to form a boss structure. Exemplarily, the number of lower air holes 32 is two, and the upper air hole 31 and the lower air hole 32 are not in the same vertical plane.
[0035] The workpiece 3 is subjected to airtightness test, and the airtightness test is shown in Figure 1 , 2 In some embodiments of the present application, a plug structure is provided, which is pressed towards the workpiece 3 from the side of the workpiece 3 provided with the upper air hole 31, comprising: a base plate 21, and a balance module 22 and a gas plugging module 23 mounted on the same side of the base plate 21, the gas plugging module 23 is pressed on the upper air hole 31, and the balance module 22 is pressed on the surface of the workpiece 3. The balance module 22 and the gas plugging module 23 are arranged at both ends of the base plate 21 in the maximum length direction L. Compared with other layout modes of the balance module 22 and the gas plugging module 23, the spacing distance of the balance module 22 and the gas plugging module 23 is the largest in the present scheme.
[0036] The balancing module 22 and the plugging module 23 apply pressure to two points on the same surface of the workpiece 3, and the lower air hole 32 serves as a fulcrum. At this time, the workpiece 3 actually presents a lever, and the balancing module 22 and the plugging module 23 apply downward pressure on both sides of the fulcrum, which can ensure the balance of the workpiece 3, i.e., avoid the workpiece 3 from tilting.
[0037] More importantly, the balancing module 22 and the plugging module 23 are arranged on the base plate 21 in the maximum length direction L, and the positions of the upper air hole 31 and the lower air hole 32 are relatively fixed, so that the distance between the plugging module 23 and the fulcrum is fixed. When the distance between the balancing module 22 and the plugging module 23 increases, the actual force arm of the balancing module 22 to the fulcrum increases. In the plugging process, the end of the plugging module 23 in contact with the workpiece 3 is a resilient pressure head block 231. The pressure head block 231 is tightly fitted with the upper air hole 31 through elastic deformation of the pressure head block 231. In order to ensure the fitting effect, the plugging module 23 needs to apply a relatively large pressure on the upper air hole 31 to ensure that the upper air hole 31 is closed. The pressure applied by the plugging module 23 on the upper air hole 31 and the fixed distance between the plugging module 23 and the fulcrum make the torque of the plugging module 23 on the workpiece 3 fixed. Under the above premise, based on the lever principle, the length of the force arm of the balancing module 22 to the fulcrum is as long as possible in the present scheme, so that the pressure applied by the balancing module 22 on the workpiece 3 is relatively smaller than the pressure applied by the plugging module 23 on the workpiece 3, which can ensure that the torque of the balancing module 22 and the plugging module 23 on the workpiece 3 is matched, i.e., effectively keep the workpiece 3 balanced, and also avoid the workpiece 3 from being damaged by the excessive force applied by the balancing module 22.
[0038] In the present scheme, the structure strength at the air hole position of the workpiece 3 is strengthened due to the need to insert the air pipe, so that the upper air hole 31 and the lower air hole 32 can bear greater pressure. The force applied by the balancing module 22 acts on the shell of the workpiece 3, and the workpiece 3 itself is made of plastic material. If the pressure applied by the balancing module 22 on the shell is too large, it will cause the shell to stretch and deform. In order to ensure the balance of the workpiece 3 and prevent the workpiece 3 from deforming, the pressure applied by the balancing module 22 on the workpiece 3 is required to be smaller than the pressure applied by the plugging module 23 on the upper air hole 31.
[0039] Further, the balancing module 22 includes a column 221 and a resilient buffer block 222. The two ends of the column 221 are connected to the base plate 21 and the buffer block 222. The resilient buffer block 222 in contact with the workpiece can absorb part of the force through the deformation of the buffer block 222 to reduce the damage of the balancing module 22 to the workpiece 3. Specifically, the buffer block 222 is an arc surface relative to the other side of the connecting column 221, i.e., the surface of the buffer block 222 in contact with the workpiece 3 is an arc surface. By reducing the contact area of the buffer block 222 and the workpiece 3, the positional stability between the balancing module 22 and the workpiece 3 during pressing is improved. For example, the buffer block 222 is spherical.
[0040] In some embodiments of the present application, the balancing module 22 and the air blocking module 23 are both perpendicular to the base plate 21. The balancing module 22 and the air blocking module 23 are perpendicular to the base plate 21, so that the support force of the workpiece 3 on the balancing module 22 and the air blocking module 23 is consistent with the extension direction of the balancing module 22 and the air blocking module 23, reducing the shear stress on the balancing module 22 and the air blocking module 23, reducing the mechanical fatigue at the connection between the balancing module 22, the air blocking module 23 and the base plate 21, so that the balancing module 22 and the air blocking module 23 are not easily broken, thereby increasing the service life.
[0041] The plug structure also includes a backing plate 24, which is arranged between the air blocking module 23 and the base plate 21. The length of the air blocking module 23 to the base plate 21 is increased by the backing plate 24. In the present solution, as shown in Figure 3 The lowest point of the air blocking module 23 in the vertical direction is lower than the lowest point of the balancing module 22 in the vertical direction. The upper gas hole 31 in the workpiece 3 is arranged in the recess on the upper surface of the workpiece 3, so that the upper surface of the upper gas hole 31 is lower than the upper surface of the workpiece 3. In order to ensure that the air blocking module 23 can be pressed on the upper gas hole 31, and the air blocking module 23 is pressed on the upper surface of the workpiece 3, and to prevent the air blocking module 23 from having too large a stroke to damage the housing, in the present solution, the air blocking module 23 has a height difference with the balancing module 22. Under the same stroke, the air blocking module 23 contacts the workpiece 3 before the balancing module 22, or the air blocking module 23 and the balancing module 22 contact the workpiece 3 at the same time. The torque of the balancing module 22 and the air blocking module 23 on the workpiece 3 is adapted, specifically, in the case that the air blocking module 23 and the balancing module 22 contact the workpiece 3 at the same time, the torque of the balancing module 22 and the air blocking module 23 on the workpiece 3 is consistent. In the case that the air blocking module 23 contacts the workpiece 3 before the balancing module 22, the torque of the balancing module 22 on the workpiece 3 is slightly greater than the torque of the air blocking module 23 on the workpiece 3. After the air blocking module 23 presses the workpiece 3 to produce a tilt, the balancing module 22 can correct the position of the workpiece 3, so that the workpiece 3 returns to the balanced position. Exemplarily, the height difference h between the air blocking module 23 and the balancing module 22 is in the range of 1-5mm.
[0042] The above embodiments are used to further illustrate the present application, but do not limit the present application to these specific embodiments. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be understood as within the protection scope of the present application.
Claims
1. A plug structure, characterized in that, include: The substrate (21) and the balancing module (22) and the air-blocking module (23) are installed on the same side of the substrate (21), and the balancing module (22) and the air-blocking module (23) are respectively located at both ends of the substrate (21) in the maximum length direction.
2. The plug structure according to claim 1, characterized in that, The balancing module (22) includes a column (221) and an elastic buffer block (222), with the two ends of the column (221) connected to the base plate (21) and the buffer block (222).
3. The plug structure according to claim 2, characterized in that, The buffer block (222) has an arc surface on the other side relative to the side connected to the column (221).
4. The plug structure according to claim 3, characterized in that, The buffer block (222) is spherical.
5. The plug structure according to claim 2, characterized in that, The air-blocking module (23) has an elastic pressure head block (231) disposed at the end away from the base plate (21).
6. The plug structure according to any one of claims 1-5, characterized in that, Both the balancing module (22) and the air-blocking module (23) are perpendicular to the substrate (21).
7. The plug structure according to claim 6, characterized in that, It also includes a pad (24) disposed between the air-blocking module (23) and the substrate (21).
8. The plug structure according to claim 7, characterized in that, The lowest point of the air-blocking module (23) in the vertical direction is lower than the lowest point of the balancing module (22) in the vertical direction.
9. The plug structure according to claim 8, characterized in that, The height difference between the air-blocking module (23) and the balancing module (22) is in the range of 1-5mm.