Small-sized sealing performance testing device

Abstract

The utility model relates to the field of negative pressure vacuum sealing test application, and discloses a small-sized sealing performance testing device which comprises a device base and a touch screen used for controlling the whole testing process and displaying an operation interface. The right end of the piston base limiting part is connected with a first clamp through a first air exhaust assembly, the right end of the piston base limiting part is connected with a second clamp through a second air exhaust assembly, the first clamp and the second clamp are both fixedly connected to the top end of the workbench, a first jig quick clamp is arranged at the top end of the first clamp, and a first product is arranged on the inner wall of the first clamp. A second jig quick clamp is arranged at the top end of the second clamp. According to the utility model, piston type mechanical vacuumizing negative pressure is adopted, the cylinder diameter is 40mm, the cavity is 400ml, the piston barrel and the air cylinder push-pull vacuumizing negative pressure can reach-90kpa, the vacuum negative pressure sensor monitors the negative pressure value in real time, and the Pansong DP101 vacuum negative pressure sensor is adopted, the negative pressure value is-100kpa to 100kpa, and the detection precision is + / 5pa.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure vacuum sealing test applications, and in particular to a small sealing performance test device. Background Technology

[0002] With the rapid development of global manufacturing, especially in the fields of automobiles, medical devices, and electronics, products are becoming increasingly precise, smaller, and lighter, and the operating conditions are extremely demanding. This places extremely high demands on the processing of such small, lightweight, and high-precision products, making performance testing of these products extremely important.

[0003] The currently manufactured metal cylinder assembly is assembled using precision fittings, springs, and sealing rings. The outer diameter of the springs and sealing rings is only 5-7mm. The fittings use an interference fit to compress the springs and tighten the sealing rings. To ensure that the sealing performance of the shipped products fully meets sealing standards, each product needs to undergo sealing performance testing. Common sealing performance testing methods include the bubble method, pressure test, vacuum test, helium leak test, ultrasonic leak test, infrared thermography, water immersion method, dry air method, tracer liquid method, and negative pressure method. The selection of these methods should be based on a comprehensive consideration of the product characteristics, testing conditions, and testing requirements. For example, the bubble method and pressure test are suitable for most common containers and pipes; the vacuum test and helium leak test are suitable for high-precision applications; and the ultrasonic leak test and infrared thermography are suitable for complex environments and large-area testing. Each method has its advantages and disadvantages; choosing the appropriate method can ensure the accuracy and efficiency of the test.

[0004] Given the current product types, there is an urgent need to develop and select suitable sealing test methods, and then design and develop professional testing equipment based on the requirements of the test methods to solve the product sealing test needs, replace the currently available general-purpose but expensive testing equipment, reduce product testing costs, and improve the market competitiveness of manufacturing. In response to this technical problem, this application proposes a small sealing test device. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a small-scale sealing test device. It employs a piston-type mechanical vacuum negative pressure system with a cylinder diameter of 40mm, a chamber size of 400ml, and a piston cylinder. The cylinder push-pull mechanism can achieve a vacuum negative pressure of -90kPa. A vacuum negative pressure sensor monitors the negative pressure value in real time. The device uses a Panasonic DP101 vacuum negative pressure sensor with a range of -100kPa to 100kPa and a detection accuracy of + / 5Pa.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A small-scale sealing test device includes a base and a touch screen for controlling the entire test process and displaying the operation interface. A piston base limiter is located at the top of the base. The right end of the piston base limiter is connected to a clamp via a first suction assembly. The right end of the piston base limiter is also connected to a clamp via a second suction assembly. Both clamps are fixedly connected to the top of a workbench. A quick-clamp fixture is located at the top of clamp one, and a product is placed on its inner wall. A quick-clamp fixture is located at the top of clamp two, and a product is placed on its inner wall. A start / stop assembly for initiating and stopping the test is located at the top of the workbench. A display assembly and a detection assembly are also located at the top of the workbench.

[0008] Furthermore, the first suction assembly includes a piston connecting plate located at the right end of the piston base limiting position. A piston rod is provided at the right end of the piston connecting plate. A piston cylinder is slidably connected to the outer wall of the piston rod. A piston negative pressure port is fixedly connected to the right end of the piston cylinder. A cylinder is provided at the right end of the piston connecting plate. The cylinder is fixedly connected to the rear end of the piston cylinder. A negative pressure pipe is fixedly connected to the right end of the piston negative pressure port. The negative pressure pipe is connected to the clamp through the clamp negative pressure port.

[0009] Furthermore, the second air extraction assembly includes a second piston connecting plate located at the right end of the piston base limiting position. A second piston rod is provided at the right end of the second piston connecting plate. A second piston cylinder is slidably connected to the outer wall of the second piston rod. A second piston negative pressure air port is fixedly connected to the right end of the second piston cylinder. A second negative pressure air pipe is fixedly connected to the right end of the second piston negative pressure air port. The second negative pressure air pipe is connected to the second clamp through the second clamp negative pressure air port. A second cylinder is provided at the right end of the second piston connecting plate. The second cylinder is fixedly connected to the front end of the second piston cylinder.

[0010] Furthermore, the start / stop component includes a start button 1 located at the top of the workbench, an emergency stop button 1 located at the top of the workbench, a start button 2 located at the top of the workbench, and an emergency stop button 2 located at the top of the workbench.

[0011] Furthermore, the display component includes a red light buzzer located at the top of the workbench, a green light fixedly connected to the top of the workbench, a red light buzzer fixedly connected to the top of the workbench, and a green light fixedly connected to the top of the workbench.

[0012] Furthermore, the detection component includes a negative pressure sensor one located at the top of the workbench, and a negative pressure sensor two fixedly connected to the top of the workbench.

[0013] Furthermore, the touchscreen integrates functions such as test parameter setting, test status display, and test data recording and querying.

[0014] Furthermore, the device base serves to support and fix all components of the entire testing device, ensuring the stability of the device.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, a piston-type mechanical vacuum negative pressure is used, with a cylinder diameter of 40mm, a cavity of 400ml, a piston cylinder, and a cylinder push-pull vacuum negative pressure that can reach -90kpa. A vacuum negative pressure sensor monitors the negative pressure value in real time, and a Panasonic DP101 vacuum negative pressure sensor is used, with a detection accuracy of -100kpa~100kpa and a detection accuracy of + / 5pa. It can also be positioned and clamped according to the product shape, and can be manually and quickly clamped to ensure that the product test clamping is sealed and leak-free.

[0017] 2. In this utility model, the negative pressure detection is started with one button, -85kPa, negative pressure, pressure holding time is 10s, allowable leakage is + / -5kPa, automatic calculation and judgment of OK / NG, and audible and visual alarm prompts. It is simple to operate, with a single detection time of 20s. The system automatically calculates the production capacity and yield. Moreover, the piston mechanical vacuuming has a noise of 30dB, which is far lower than the working noise of vacuum generators and vacuum compressors. Attached Figure Description

[0018] Figure 1 This is a perspective view of a small sealing performance testing device proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the cylinder structure of a small sealing performance testing device proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the negative pressure air pipe structure of a small sealing test device proposed in this utility model.

[0021] Legend:

[0022] 10. Start button 1; 20. Emergency stop button 1; 30. Workbench; 40. Red light buzzer 1; 50. Negative pressure sensor 1; 60. Green light 1; 70. Touch screen; 80. Red light buzzer 2; 90. Negative pressure sensor 2; 100. Green light 2; 110. Fixture quick clamp 1; 120. Fixture quick clamp 2; 130. Emergency stop button 2; 140. Start button 2; 150. Fixture 2; 160. Product 2; 170. Fixture 1; 180. Product 1; 190. Device base; 200. Piston negative pressure port one; 210. Cylinder one; 220. Cylinder two; 230. Piston negative pressure port two; 240. Piston cylinder two; 250. Piston rod two; 260. Piston two connecting plate; 270. Piston base limit; 280. Piston one connecting plate; 290. Piston rod one; 300. Piston cylinder one; 310. Negative pressure air pipe one; 320. Clamp negative pressure air port one; 330. Clamp negative pressure air port two; 340. Negative pressure air pipe two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-3 This utility model provides an embodiment of a small-scale sealing test device, including a device base 190 and a touch screen 70 for controlling the entire test process and displaying the operation interface. A piston base limiter 270 is provided at the top of the device base 190. The right end of the piston base limiter 270 is connected to a clamp 170 via a piston connecting plate 280, a piston rod 290, a piston cylinder 300, a piston negative pressure port 200, a negative pressure air pipe 310, and a clamp negative pressure port 320. The right end of the piston base limiter 270 is connected to a piston connecting plate 260, a piston rod 250, a piston cylinder 240, and a piston negative pressure port. The second 230, the second negative pressure air pipe 2340 and the second negative pressure air port 2330 of the fixture are connected to the second 150. The first 170 and the second 150 are both fixedly connected to the top of the workbench 30. The top of the first 170 is equipped with the first quick clamp 110, and the inner wall of the first 170 is equipped with the first product 180. The top of the second 150 is equipped with the second quick clamp 120, and the inner wall of the second 150 is equipped with the second product 160. The top of the workbench 30 is equipped with the first start button 10 for starting and stopping the test. The top of the workbench 30 is equipped with the first red light buzzer 40. The top of the workbench 30 is equipped with the first negative pressure sensor 50.

[0025] Specifically, the workbench 30 serves as the working surface of the device, used to fix and install fixture 170 and fixture 2150, as well as related components such as start / stop components, display components, and detection components, providing a stable operating platform for product testing. The device base 190 supports and fixes all components of the entire testing device, including the workbench 30 and the piston-type mechanical vacuum module, ensuring the overall stability of the device, reducing vibration and displacement during testing, and ensuring the accuracy of test results. Fixture 170 and fixture 2150 can be designed with a concave contour structure according to the product sealing test requirements, adapting to the shape of product 180 and product 2160. Sealing rings are pre-embedded at the bottom of the fixtures. After the product is placed in the fixture, it is quickly clamped by the fixture, causing the sealing ring to be sealed under pressure, providing a stable clamping environment for the product and ensuring that the product's sealing cavity is isolated from the outside during testing, meeting the sealing test conditions. The quick clamp 110 or quick clamp 2 120 of the operating fixture can quickly press product 180 onto clamp 170 and product 260 onto clamp 250, ensuring that the product is fixed in position during the test and that the bottom of the product is in tight contact with the sealing ring at the bottom of the clamp to prevent leakage during the test and ensure accurate test results. The touch screen 70 integrates test parameter setting functions, such as setting negative pressure threshold and holding time; it displays the test status in real time, including the current negative pressure value and whether the test is in progress; it can also record and query test data, such as the number of measurements, the number of OK / NG judgments, and the yield, making it convenient for operators to monitor the test process and analyze test data. The piston base limit 270 limits the piston's movement stroke to ensure that the piston's stroke is consistent each time, ensuring that the same negative pressure vacuum degree is achieved each time vacuuming is performed, improving the repeatability and accuracy of test results.

[0026] Reference Figures 1-3A piston connecting plate 280 is located at the right end of the piston base limit 270. A piston rod 290 is provided at the right end of the piston connecting plate 280. A piston cylinder 300 is slidably connected to the outer wall of the piston rod 290. A piston negative pressure port 200 is fixedly connected to the right end of the piston cylinder 300. A cylinder 210 is provided at the right end of the piston connecting plate 280. The cylinder 210 is fixedly connected to the rear end of the piston cylinder 300. A negative pressure air pipe 310 is fixedly connected to the right end of the piston negative pressure port 200. Negative pressure air pipe 310 is connected to clamp 170 via clamp negative pressure air port 320. A piston connecting plate 260 is located at the right end of the piston base limiting plate 270. A piston rod 250 is provided at the right end of the piston connecting plate 260. A piston cylinder 240 is slidably connected to the outer wall of the piston rod 250. A piston negative pressure air port 230 is fixedly connected to the right end of the piston cylinder 240. A negative pressure air pipe 340 is fixedly connected to the right end of the piston negative pressure air port 230. The negative pressure air pipe 340 is connected to the clamp via a negative pressure air port 320. The second air port 330 is connected to the second clamp 150. The second piston connecting plate 260 is equipped with a second cylinder 220 on the right end. The second cylinder 220 is fixedly connected to the front end of the second piston cylinder 240. The first start button 10 is located at the top of the workbench 30. The first emergency stop button 20 is located at the top of the workbench 30. The second start button 140 is located at the top of the workbench 30. The second emergency stop button 130 is located at the top of the workbench 30. The first red light buzzer 40 is located at the top of the workbench 30. The first green light 60 and the second red light buzzer 80 are fixedly connected to the top of the workbench 30. The second green light 100 is fixedly connected to the top of the workbench 30. The first negative pressure sensor 50 and the second negative pressure sensor 90 are fixedly connected to the top of the workbench 30. The touch screen 70 integrates the functions of setting test parameters, displaying test status, and recording and querying test data. The device base 190 supports and fixes all the components of the entire test device to ensure the stability of the device.

[0027] Specifically, pressing start button 10 or start button 2 140 triggers the electrical control system to open the solenoid valve, causing cylinder 1 210 or cylinder 2 220 to move, which in turn moves piston rod 1 290 or piston rod 250. This activates the piston-type mechanical vacuum module, initiating the negative pressure testing process for product 1 180 or product 2 160. During the test, if any abnormality occurs, pressing emergency stop button 1 20 or emergency stop button 2 130 will immediately stop the cylinder movement, terminating the negative pressure test to ensure equipment and product safety and prevent accidents. Negative pressure sensors 1 50 and 2 90 can monitor fixtures 1 170 and 2 90 in real time. The system measures the negative pressure value of the sealed cavity within 150 kPa and transmits the data to the control system. Taking the Panasonic DP101 vacuum negative pressure sensor as an example, its measurement range is -100 kPa to 100 kPa, and its detection accuracy is ±5 Pa. This provides accurate data for the system to determine whether the product's sealing performance is up to standard. When the control system determines that the product's sealing performance is up to standard based on the data monitored by the negative pressure sensor, either green light 60 or green light 100 will illuminate. If the test fails, either red light buzzer 40 or red light buzzer 80 will illuminate and emit a buzzing sound, visually displaying the product's test results to the operator. Cylinders 210 and 220 serve as power sources. Under the control of the control system, cylinder 210... The piston rod of cylinder 10 or cylinder 220 extends or retracts, driving piston rod 1 (290) or piston rod 2 (250) to move, realizing the reciprocating motion of the piston within piston cylinder 1 (300) or piston cylinder 2 (240), thereby drawing air from the product's sealed cavity and creating a negative pressure environment. Piston 1 connecting plate 280 connects piston rod 1 (290) to the piston, and piston 2 connecting plate 260 connects piston rod 2 (250) to the piston, ensuring that the piston rod's movement is stably transmitted to the piston, allowing the piston to work normally within the piston cylinder and maintaining the stable operation of the vacuum module. Piston negative pressure port 1 (200) and piston negative pressure port 2 (230) are located at the right end of piston cylinder 1 (300) and piston cylinder 2 (240), respectively, to discharge the drawn air. The passage connects the piston cylinder and the negative pressure air pipe, transmitting the air extracted from the piston cylinder to the negative pressure air pipe for final discharge or subsequent processing. Negative pressure air pipe 1 310 and negative pressure air pipe 2 340 connect the piston negative pressure air port and the clamp negative pressure air port, delivering the air extracted from the piston cylinder to clamp 1 170 and clamp 2 150, creating a negative pressure environment in the product sealing cavity. This is an important connecting component for realizing the vacuuming function. Clamp negative pressure air port 1 320 and clamp negative pressure air port 2 330 are located on clamp 1 170 and clamp 2 150 respectively, connected to the negative pressure air pipe. This is the interface for introducing negative pressure into the product sealing cavity, ensuring communication between the vacuuming device and the product sealing cavity, and enabling the detection of product sealing performance.

[0028] Working principle: Product 180 is placed into the positioning groove of fixture 170, and the product is pressed by quick clamp 110, so that the bottom contact surface of the product presses against the sealing ring at the bottom of fixture 170, ensuring a leak-free clamping seal; similarly, product 2160 is placed into fixture 2150 and pressed by quick clamp 220. Pressing start button 10 or start button 2140, the electrical control system issues a command to open the solenoid valve, and the piston rod of cylinder 1210 or cylinder 220... Under air pressure, the piston extends, driving piston rod 290 or piston rod 250 to move. The piston rod pushes the piston to slide within piston cylinder 300 or piston cylinder 240, drawing out air from the piston cylinder. This air is then pumped out through piston negative pressure port 200 and negative pressure pipe 310 or piston negative pressure port 230 and negative pressure pipe 340, creating a negative pressure environment in the sealed cavity of the product within clamp 170 or clamp 2150. Piston base limit 270 ensures consistent piston stroke with each movement, guaranteeing the same result each time. During the vacuuming process, negative pressure sensor 50 or negative pressure sensor 90 monitors the negative pressure value in real time and transmits the data to the control system. When the negative pressure value reaches the set -85 kPa, the system starts timing and holds the pressure for 10 seconds. If the negative pressure value does not change within the set allowable leakage range of ±5 kPa during the holding time, the system determines that the test is OK and outputs a signal to illuminate green light 60 or green light 100. If the allowable leakage range is exceeded, the test is determined to be NG and outputs a signal to activate red light buzzer 40 or red light buzzer 80 to issue an audible and visual alarm. The control system records the number of measurements in real time, counts the number of OK / NG determinations, and automatically calculates the yield. This data is displayed on the touch screen 70, allowing operators to view the test status and historical data. Test parameters, such as negative pressure threshold and holding time, can also be set through the touch screen 70. If it is necessary to stop the test, the emergency stop button 20 or emergency stop button 130 can be pressed to stop the cylinder action and terminate the test.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A small-scale sealing performance testing device, characterized in that: The device includes a base (190) and a touch screen (70) for controlling the entire testing process and displaying the operation interface. A piston base limiter (270) is provided at the top of the base (190). A clamp (170) is connected to the right end of the piston base limiter (270) through a vacuum assembly. A clamp (150) is connected to the right end of the piston base limiter (270) through a vacuum assembly. Both clamps (170) and clamp (150) are fixedly connected to the top of the workbench (30). At the end, the top of the first fixture (170) is provided with a quick clamp first (110), and the inner wall of the first fixture (170) is provided with a product first (180). The top of the second fixture (150) is provided with a quick clamp second (120), and the inner wall of the second fixture (150) is provided with a product second (160). The top of the workbench (30) is provided with a start-stop component for starting and stopping the test. The top of the workbench (30) is provided with a display component. The top of the workbench (30) is provided with a detection component.

2. The small-scale sealing performance testing device according to claim 1, characterized in that: The first air extraction assembly includes a piston connecting plate (280) located at the right end of the piston base limit (270). A piston rod (290) is provided at the right end of the piston connecting plate (280). A piston cylinder (300) is slidably connected to the outer wall of the piston rod (290). A piston negative pressure port (200) is fixedly connected to the right end of the piston cylinder (300). A cylinder (210) is provided at the right end of the piston connecting plate (280). The cylinder (210) is fixedly connected to the rear end of the piston cylinder (300). A negative pressure air pipe (310) is fixedly connected to the right end of the piston negative pressure air port (200). The negative pressure air pipe (310) is connected to the clamp (170) through the clamp negative pressure air port (320).

3. The small-scale sealing performance testing device according to claim 1, characterized in that: The second air extraction assembly includes a piston second connecting plate (260) located at the right end of the piston base limit (270). A piston rod second (250) is provided at the right end of the piston second connecting plate (260). A piston cylinder second (240) is slidably connected to the outer wall of the piston rod second (250). A piston negative pressure air port second (230) is fixedly connected to the right end of the piston cylinder second (240). A negative pressure air pipe second (340) is fixedly connected to the right end of the piston negative pressure air port second (230). The negative pressure air pipe second (340) is connected to the clamp second (150) through the clamp negative pressure air port second (330). A cylinder second (220) is provided at the right end of the piston second connecting plate (260). The cylinder second (220) is fixedly connected to the front end of the piston cylinder second (240).

4. The small-scale sealing performance testing device according to claim 1, characterized in that: The start / stop component includes a start button 1 (10) located at the top of the workbench (30), an emergency stop button 1 (20) located at the top of the workbench (30), a start button 2 (140) located at the top of the workbench (30), and an emergency stop button 2 (130) located at the top of the workbench (30).

5. A small-scale sealing performance testing device according to claim 1, characterized in that: The display component includes a red light buzzer 1 (40) located at the top of the workbench (30), a green light 1 (60) fixedly connected to the top of the workbench (30), a red light buzzer 2 (80) fixedly connected to the top of the workbench (30), and a green light 2 (100) fixedly connected to the top of the workbench (30).

6. A small-scale sealing performance testing device according to claim 1, characterized in that: The detection component includes a negative pressure sensor 1 (50) located at the top of the workbench (30), and a negative pressure sensor 2 (90) fixedly connected to the top of the workbench (30).

7. A small-scale sealing performance testing device according to claim 1, characterized in that: The touch screen (70) integrates functions such as test parameter setting, test status display, and test data recording and query.

8. A small-scale sealing performance testing device according to claim 1, characterized in that: The device base (190) serves to support and fix all components of the entire testing device, ensuring the stability of the device.

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