Detection device

Abstract

The utility model discloses a detection device, and relates to the technical field of product detection.The detection device comprises a pin structure, a valve, a fluid input mechanism, a pressure difference detection device and a prompt device.The first end of the pin structure is used for being connected with a to-be-detected piece, and one end of the valve communicates with the second end of the pin structure; the fluid input mechanism is communicated with the other end of the valve; the fluid input mechanism is used for filling a to-be-detected piece with a fluid medium, and the pressure difference detection device is used for detecting a fluid pressure change value in the to-be-detected piece; the prompting device is electrically connected with the differential pressure detection device; the prompt device is used for outputting qualified prompt information or warning prompt information according to whether the fluid pressure change value exceeds the fluid pressure change threshold value or not. According to the technical scheme provided by the invention, the detection device directly measures the fluid pressure change value after the to-be-detected piece is filled with the fluid medium by using the pressure difference detection device, can more accurately capture the sealing problem, and improves the detection accuracy and efficiency.

Description

Technical Field

[0001] This application relates to the field of product testing technology, and in particular to a testing device. Background Technology

[0002] Water purifier filter manufacturers need to conduct rigorous airtightness testing on their filters during production to ensure product quality and performance, and to avoid water waste and equipment damage caused by poor airtightness. Existing testing devices generally use aeration and water immersion to test the sealing performance of welded parts and seals. Specifically, the product needs to be assembled on the testing device, and the filter element is subjected to aeration and water immersion using testing fixtures to test its sealing performance. The presence of leaks or seepage is observed to determine if the filter element's airtightness is up to standard. However, this method relies on visual inspection, which can easily lead to missed detections and misjudgments, resulting in defective products being released. Therefore, existing testing devices suffer from low accuracy. Utility Model Content

[0003] The main purpose of this application is to propose a detection device that aims to solve the problem of low detection accuracy in existing detection devices.

[0004] To achieve the above objectives, the detection device proposed in this application includes:

[0005] A pin structure, wherein the first end of the pin structure is used to connect to the component to be tested;

[0006] A valve, one end of which is connected to the second end of the pin structure;

[0007] A fluid input mechanism is connected to the other end of the valve; the fluid input mechanism is used to fill the test piece with a fluid medium.

[0008] A differential pressure detection device, wherein the differential pressure detection device is used to detect the change value of fluid pressure in the test piece;

[0009] A prompting device is electrically connected to the differential pressure detection device; the prompting device is used to output a qualified prompting message or a warning prompting message based on whether the fluid pressure change value exceeds the fluid pressure change threshold.

[0010] In one embodiment, the prompting device includes a storage module, a comparison module, and an information sending module. The storage module is electrically connected to the comparison module, and the comparison module is electrically connected to the information sending module. The storage module stores a preset fluid pressure change threshold, and the comparison module determines whether the fluid pressure change value is greater than the fluid pressure change threshold. If the fluid pressure change value is less than the fluid pressure change threshold, the comparison module causes the information sending module to issue a qualified prompt message. If the fluid pressure change value is greater than the fluid pressure change threshold, the comparison module causes the information sending module to issue a warning prompt message.

[0011] In one embodiment, the differential pressure sensing device is disposed at the first end of the pin structure.

[0012] In one embodiment, the detection device further includes a housing, with the fluid input mechanism and the valve disposed inside the housing; the outer surface of the housing is provided with a detection plane, and the first end of the pin structure extends through the detection plane to the outside of the housing.

[0013] In one embodiment, the detection device further includes a material ejection structure, which includes an ejection plate and a driving assembly. The ejection plate is disposed on the detection plane, and the first end of the pin structure passes through the ejection plate. The driving assembly is used to drive the ejection plate to move along the length direction of the pin structure, and the ejection plate abuts against the workpiece to be detected.

[0014] In one embodiment, the drive assembly further includes a cylinder and a transmission component. The cylinder is disposed within the housing, and the transmission component is throttle-connected to the telescopic rod of the cylinder. The two ends of the transmission component are respectively provided with a first extension shaft and a second extension shaft. The end of the first extension shaft is connected to one end of the ejector plate, and the end of the second extension shaft is connected to the end of the ejector plate away from the first extension shaft.

[0015] In one embodiment, the drive assembly further includes a cylinder mounting plate located below the detection plane, and the cylinder is connected to the cylinder mounting plate.

[0016] In one embodiment, the detection device further includes a start button located on the outer surface of the housing, and the start button is electrically connected to the valve, the fluid input mechanism, the differential pressure detection device, and the indication device, respectively; and / or,

[0017] The detection device also includes an emergency stop button, which is located on the outer surface of the housing and is electrically connected to the valve, the fluid input mechanism, the differential pressure detection device, and the prompting device.

[0018] In one embodiment, the detection device includes a plurality of pin structures, a plurality of valves, a plurality of differential pressure detection devices, and a plurality of prompting devices. Each pin structure and each valve are connected in a one-to-one correspondence. The end of each valve away from the pin structure is connected to the fluid input mechanism. Each differential pressure detection device is used to acquire the fluid pressure change value of the test piece on the corresponding pin structure. Each prompting device is used to output a corresponding qualified prompt message or a warning prompt message based on whether the corresponding fluid pressure change value exceeds the fluid pressure change threshold.

[0019] In one embodiment, the information transmitting module includes a speaker and / or indicator lights and / or a display screen; and / or,

[0020] The differential pressure detection device includes a differential pressure sensor.

[0021] The technical solution of this application uses a differential pressure detection device to detect the change in fluid pressure inside the component under test after it is filled with fluid medium, and realizes the sealing performance detection of the component side by determining whether the change in fluid pressure exceeds the fluid pressure change threshold, thereby improving the accuracy of the detection. Specifically, the pin structure connects the component under test to the fluid input mechanism, which is responsible for filling the component with fluid medium. A valve connects the second end of the pin structure to the fluid input mechanism to control the flow of fluid. A differential pressure detection device detects the change in fluid pressure within the component under test; that is, it measures the change in fluid pressure over a certain period after the component is filled with fluid medium and compares it with a preset fluid pressure change threshold to determine if the component's sealing performance is acceptable. An indicator device is electrically connected to the differential pressure detection device. If the fluid pressure change exceeds the set threshold, the indicator device outputs a warning message; if the fluid pressure change does not exceed the set threshold, the indicator device outputs a pass / fail message. This detection device directly measures the fluid pressure change after the component is filled with fluid medium using a differential pressure detection device, enabling more accurate detection of sealing problems. Compared to traditional visual inspection methods, this improves the accuracy and efficiency of detection, thus preventing substandard products from entering the market. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the connection structure of an embodiment of the detection device provided in this application;

[0024] Figure 2 A schematic diagram of the structure of an embodiment of the detection device provided in this application;

[0025] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the detection device provided in this application.

[0026] Explanation of icon numbers:

[0027] 1. Pin structure; 2. Valve; 3. Fluid input mechanism; 4. Differential pressure detection device; 5. Indicator device; 51. Indicator light; 6. Unloading structure; 61. Unloading plate; 62. Drive assembly; 621. Cylinder; 622. Transmission component; 623. Including cylinder mounting plate; 7. Start button; 8. Emergency stop button; 9. Item to be tested; 10. Touch screen; 101. Housing; 1011. Detection plane.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] Water purifier filter manufacturers need to conduct rigorous airtightness testing on their filters during production to ensure product quality and performance, and to avoid water waste and equipment damage caused by poor airtightness. Existing testing devices generally use air permeation to test the sealing performance of welded parts and seals. Specifically, the product needs to be assembled onto the testing device, and the filter element is subjected to air permeation and water immersion using testing fixtures to test its airtightness. The presence of leaks or seepage is observed to determine if the filter element's airtightness is up to standard. However, this method relies on visual inspection, which can easily lead to missed detections and misjudgments, resulting in defective products being released. Therefore, existing testing devices suffer from low accuracy.

[0033] To address the aforementioned problems, this application proposes a detection device.

[0034] Please see Figures 1 to 3 In one embodiment of this application, the detection device includes a pin structure 1, a valve 2, a fluid input mechanism 3, a differential pressure detection device 4, and an indication device 5. The first end of the pin structure 1 is used to connect to the component 9 to be tested, one end of the valve 2 is connected to the second end of the pin structure 1, and the fluid input mechanism 3 is connected to the other end of the valve 2. The fluid input mechanism 3 is used to fill the component 9 with a fluid medium, and the differential pressure detection device 4 is used to detect the change in fluid pressure within the component 9. The indication device 5 is electrically connected to the differential pressure detection device 4. The indication device 5 is used to output a qualified indication message or a warning indication message based on whether the change in fluid pressure exceeds a fluid pressure change threshold.

[0035] By using differential pressure detection device 4 to detect the change in fluid pressure inside the component 9 after it is filled with fluid medium, and by determining whether the change in fluid pressure exceeds the fluid pressure change threshold, the sealing performance of the belt side component is tested, thus improving the accuracy of the test. Specifically, the pin structure 1 connects the component to be tested 9 to the fluid input mechanism 3, which is responsible for filling the component to be tested 9 with fluid medium. The valve 2 connects the second end of the pin structure 1 to the fluid input mechanism 3 to control the flow of fluid. The differential pressure detection device 4 detects the change in fluid pressure within the component to be tested 9, that is, it can measure the change in fluid pressure within a certain period of time after the component to be tested 9 is filled with fluid medium, and compare it with a preset fluid pressure change threshold to determine whether the sealing performance of the component to be tested 9 is qualified. The prompting device 5 is electrically connected to the differential pressure detection device 4. If the change in fluid pressure exceeds the set threshold, the prompting device 5 will output a warning message; if the change in fluid pressure does not exceed the set threshold, the prompting device 5 will output a qualified message. This detection device directly measures the change in fluid pressure after the component to be tested 9 is filled with fluid medium by using the differential pressure detection device 4, which can more accurately capture sealing problems. Compared with traditional detection methods that rely on visual inspection, it improves the accuracy and efficiency of detection, thereby preventing unqualified products from entering the market.

[0036] Furthermore, traditional testing methods require ventilating and immersing the test piece 9 in water using testing fixtures. After testing, the test piece needs to be dried, typically using an air gun to blow away residual moisture. However, air guns generate significant noise, potentially affecting employee health. The testing device in this application reduces post-testing processing, improving work efficiency and reducing noise in the production environment, thus contributing to a better working environment.

[0037] It should be noted that the fluid mentioned above can be a gas, a liquid, or other detection fluid medium.

[0038] In one embodiment, the prompting device 5 includes a storage module, a comparison module, and an information transmission module. The storage module is electrically connected to the comparison module, and the comparison module is electrically connected to the information transmission module. The storage module is used to store a preset fluid pressure change threshold, and the comparison module is used to determine whether the fluid pressure change value is greater than the fluid pressure change threshold. If the fluid pressure change value is less than the fluid pressure change threshold, the comparison module causes the information transmission module to issue a qualified prompt message. If the fluid pressure change value is greater than the fluid pressure change threshold, the comparison module causes the information transmission module to issue a warning prompt message.

[0039] The storage module stores preset fluid pressure change thresholds, which can be pre-set based on historical data, experimental results, and quality control standards. The comparison module compares the actual measured fluid pressure change value with the preset threshold in the storage module. By determining whether the fluid pressure change value exceeds the threshold, it determines whether the product is qualified. The information issuance module issues corresponding prompts based on the comparison module's results. If the fluid pressure change value is less than the threshold, a qualified prompt is issued; if the fluid pressure change value is greater than the threshold, a warning prompt is issued. This instant feedback mechanism ensures that operators can take swift action to handle non-conforming products. The automated comparison and information issuance mechanism can quickly complete the detection process, improving production efficiency and reducing the possibility of human error in reading and judging. Using the same threshold and judgment logic for each test ensures consistency of test results. The fluid pressure change thresholds and test results in the storage module can be used for quality control and subsequent analysis, helping to improve the production process and product quality. It should be noted that the preset fluid pressure change thresholds can be adjusted according to new data and standards.

[0040] In one embodiment, the differential pressure detection device 4 includes a differential pressure sensor.

[0041] The differential pressure sensor can accurately measure the pressure difference inside the tested component 9 at different times. By comparing pressure readings at different time points, it can provide precise pressure measurements, enabling the detection device to detect even minute fluid leaks and improving detection accuracy. The time difference between different time points is called the holding time, which can be preset and stored in a storage module. The storage module is electrically connected to the differential pressure sensor, allowing the sensor to obtain the pressure difference of the tested component 9 at the initial time and after the holding time.

[0042] In one embodiment, the detection device further includes a first pressure sensor. The differential pressure sensor is used to acquire the actual pressure value within the test piece 9. The differential pressure sensor is electrically connected to the valve 2. For example, when the detection fluid is gas, the fluid input mechanism 3 uses an inflation mechanism. After the detection device is started, the valve 2 opens, and the inflation mechanism opens. After the pressure sensor detects that the test piece 9 has reached the set detection pressure requirement, which is the initial detection time, the pressure sensor causes the valve 2 to close, and the test piece 9 begins to hold pressure. After the holding time, the differential pressure sensor obtains the pressure difference between the test piece 9 at the initial time and after the holding time, i.e., the pressure change value. It should be noted that the differential pressure sensor generally includes two second pressure sensors for detecting the pressure values ​​at two different time points. The first pressure sensor can be replaced by one of the second pressure sensors of the differential pressure sensor. Therefore, after the detection device is activated, valve 2 opens, and the inflation mechanism begins to inflate the component 9 under test. The first pressure sensor (or one of the second pressure sensors) detects the pressure inside the component 9 until the set detection pressure requirement is reached. Once the component 9 reaches the set detection pressure, this time is defined as the initial detection time. The first pressure sensor sends a signal to close valve 2, stopping inflation, and the component 9 begins to hold pressure. The component 9 is held at the set pressure for a certain period of time, which is called the holding time. After the holding time, the differential pressure sensor (including two second pressure sensors) measures the pressure difference between the component 9 at the initial time and after the holding time, i.e., the pressure change value. By comparing the pressure values ​​at two different time points, the differential pressure sensor can calculate the pressure change value, thereby determining whether the component 9 under test has leakage or other sealing problems.

[0043] In one embodiment, the detection device further includes an input display device electrically connected to the storage module. The input display device is used to set the pressure change value, the holding time, and the pressure change threshold; specifically, the input display device is a touch screen 10.

[0044] In one embodiment, the differential pressure detection device 4 is disposed at the first end of the pin structure 1.

[0045] The differential pressure detection device 4 is located at the first end of the pin structure 1, so that the differential pressure detection device 4 is inserted into the inside of the detection component to ensure that the measured fluid pressure change value is obtained directly from the inside of the component to be tested 9, thereby reducing the influence of the external environment on the measurement results and reducing detection errors.

[0046] In one embodiment, the detection device further includes a housing 101, a fluid input mechanism 3 and a valve 2 disposed inside the housing 101; the outer surface of the housing 101 is provided with a detection plane 1011, and the first end of the pin structure 1 extends through the detection plane 1011 to the outside of the housing 101.

[0047] Integrating the fluid input mechanism 3 and valve 2 inside the housing 101 protects them from external environmental influences such as dust and moisture, thereby improving the durability and reliability of the device. Furthermore, the first end of the pin structure 1 extends outward through the detection plane 1011 of the housing 101, allowing operators to directly connect the pin structure 1 to the workpiece 9 under test on the detection plane 1011 without opening the housing 101 or accessing internal components, thus improving testing efficiency.

[0048] In one embodiment, the detection device further includes a material ejection structure 6, which includes a material ejection plate 61 and a drive assembly 62. The material ejection plate 61 is disposed on the detection plane 1011, and the first end of the pin structure 1 passes through the material ejection plate 61. The drive assembly 62 is used to drive the material ejection plate 61 to move along the length direction of the pin structure 1, and the material ejection plate 61 abuts against the workpiece 9 to be detected.

[0049] The ejector structure 6 drives the ejector plate 61 to move along the length of the pin structure 1 via the drive component 62, so that the ejector plate 61 abuts against the workpiece 9 to be tested until the workpiece 9 is pushed out of the pin structure 1. The addition of the ejector structure 6 improves the automation of the testing process, reduces the testing cycle time, and improves the overall production efficiency. Operators do not need to manually remove the workpiece 9 to be tested, which reduces the complexity and labor intensity of the operation, and at the same time reduces the possibility of human error, avoiding accidental damage to the pin structure 1 or the workpiece 9 to be tested when removing it.

[0050] In one embodiment, the drive assembly 62 further includes a cylinder 621 and a transmission member 622. The cylinder 621 is disposed inside the housing 101. The transmission member 622 is connected to the telescopic rod of the cylinder 621. The two ends of the transmission member 622 are respectively provided with a first extension shaft and a second extension shaft. The end of the first extension shaft is connected to one end of the ejector plate 61, and the end of the second extension shaft is connected to the end of the ejector plate 61 away from the first extension shaft.

[0051] Using a cylinder 621 as a power source provides a stable and controllable force to push the ejector plate 61. The cylinder 621 drive is more reliable and durable than electric or manual drives. The extension and retraction of the cylinder 621 can be precisely adjusted via fluid pressure control, allowing for precise control of the ejector plate 61's movement speed and force to adapt to different workpieces 9. Furthermore, the transmission component 622 is connected to both ends of the ejector plate 61 to ensure greater stability when pushing the workpiece 9, reducing deviation or tilting. By housing the cylinder 621 and transmission component 622 within the housing 101, the entire drive assembly 62 is compact, reducing space requirements and protecting internal components from external environmental influences.

[0052] In one embodiment, the drive assembly 62 further includes a cylinder 621 mounting plate located below the detection plane 1011, and the cylinder 621 is connected to the cylinder 621 mounting plate.

[0053] The cylinder 621 mounting plate provides a stable platform for fixing the cylinder 621, which helps to reduce the vibration and movement of the cylinder 621 during operation, thereby improving the stability of the entire drive assembly 62; the cylinder 621 mounting plate is located below the detection plane 1011, which helps to maintain the compactness and neatness of the detection device.

[0054] In one embodiment, the detection device further includes a start button 7, which is located on the outer surface of the housing 101. The start button 7 is electrically connected to the valve 2, the fluid input mechanism 3, the differential pressure detection device 4, and the prompting device 5.

[0055] A start button 7 electrically connects valve 2, fluid input mechanism 3, differential pressure detection device 4, and indicator device 5, enabling centralized control of the detection device and improving operational convenience. Specifically, pressing the start button 7 energizes valve 2, fluid input mechanism 3, differential pressure detection device 4, and indicator device 5; the start button 7 can be equipped with an LED indicator 51 to indicate the working status of the detection device, such as standby, working, or fault.

[0056] In one embodiment, the detection device further includes an emergency stop button 8, which is located on the outer surface of the housing 101 and is electrically connected to the valve 2, the fluid input mechanism 3, the differential pressure detection device 4, and the prompting device 5.

[0057] The emergency stop button 8 provides a physical means to immediately cut off the power and air supply to the detection device, thereby stopping the operation of the fluid input mechanism 3 and the valve 2 and ensuring the safety of the operator and the equipment. Specifically, the emergency stop button 8 is electrically connected to the valve 2, the fluid input mechanism 3, the differential pressure detection device 4, and the indicator device 5, ensuring that all relevant components respond immediately when the emergency stop button 8 is pressed. In addition, the emergency stop button 8 is located on the outer surface of the housing 101, making it easy for the operator to see and touch, ensuring that it can be operated quickly in an emergency and reducing potential risks.

[0058] In one embodiment, the information transmitting module includes a speaker and / or indicator light 51 and / or a display screen.

[0059] The speaker can emit audible prompts, such as beeps or voice alerts, to inform the operator of the completion of the test, warnings, or error messages. Indicator light 51 uses different colors (such as red, green, and yellow) to indicate different states; for example, green indicates a pass / fail message, and red indicates a warning message. The display screen can show text, numbers, or graphical information, providing more detailed test results and status.

[0060] In one embodiment, the detection device includes a plurality of pin structures 1, a plurality of valves 2, a plurality of differential pressure detection devices 4, and a plurality of prompting devices 5. Each pin structure 1 and each valve 2 are connected in a one-to-one correspondence. The end of each valve 2 away from the pin structure 1 is connected to the fluid input mechanism 3. Each differential pressure detection device 4 is used to acquire the fluid pressure change value of the test piece 9 on the corresponding pin structure 1. Each prompting device 5 is used to output the corresponding qualified prompt information or warning prompt information according to whether the corresponding fluid pressure change value exceeds the fluid pressure change threshold.

[0061] The detection device can simultaneously detect multiple test pieces 9. Each test piece 9 has a corresponding pin structure 1, a corresponding valve 2, and a differential pressure detection device 4. The pressure detection and control of each test piece 9 are independent and do not interfere with each other. The number of test pieces 9 can be increased or decreased as needed by correspondingly increasing or decreasing the number of pin structures 1, valves 2, differential pressure detection devices 4, and indicator devices 5.

[0062] The technical solution of this application uses a differential pressure detection device 4 to detect the change in fluid pressure inside the component 9 after it is filled with fluid medium, and realizes the sealing performance detection of the belt side component based on whether the change in fluid pressure exceeds the fluid pressure change threshold, thereby improving the accuracy of the detection. Specifically, the pin structure 1 connects the component to be tested 9 to the fluid input mechanism 3, which is responsible for filling the component to be tested 9 with fluid medium. The valve 2 connects the second end of the pin structure 1 to the fluid input mechanism 3 to control the flow of fluid. The differential pressure detection device 4 detects the change in fluid pressure within the component to be tested 9, that is, it can measure the change in fluid pressure within a certain period of time after the component to be tested 9 is filled with fluid medium, and compare it with a preset fluid pressure change threshold to determine whether the sealing performance of the component to be tested 9 is qualified. The prompting device 5 is electrically connected to the differential pressure detection device 4. If the change in fluid pressure exceeds the set threshold, the prompting device 5 will output a warning message; if the change in fluid pressure does not exceed the set threshold, the prompting device 5 will output a qualified message. This detection device directly measures the change in fluid pressure after the component to be tested 9 is filled with fluid medium by using the differential pressure detection device 4, which can more accurately capture sealing problems. Compared with traditional detection methods that rely on visual inspection, it improves the accuracy and efficiency of detection, thereby preventing unqualified products from entering the market.

[0063] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A detection device, characterized in that, include: A pin structure, wherein the first end of the pin structure is used to connect to the component to be tested; A valve, one end of which is connected to the second end of the pin structure; A fluid input mechanism is connected to the other end of the valve; the fluid input mechanism is used to fill the test piece with a fluid medium. A differential pressure detection device, wherein the differential pressure detection device is used to detect the change value of fluid pressure in the test piece; A prompting device is electrically connected to the differential pressure detection device; the prompting device is used to output a qualified prompting message or a warning prompting message based on whether the fluid pressure change value exceeds the fluid pressure change threshold.

2. The detection device as described in claim 1, characterized in that, The prompting device includes a storage module, a comparison module, and an information transmission module. The storage module is electrically connected to the comparison module, and the comparison module is electrically connected to the information transmission module. The storage module stores a preset fluid pressure change threshold. The comparison module determines whether the fluid pressure change value is greater than the fluid pressure change threshold. If the fluid pressure change value is less than the fluid pressure change threshold, the comparison module causes the information transmission module to issue a qualified prompt message. If the fluid pressure change value is greater than the fluid pressure change threshold, the comparison module causes the information transmission module to issue a warning prompt message.

3. The detection device as described in claim 1, characterized in that, The differential pressure detection device is located at the first end of the pin structure.

4. The detection device according to any one of claims 1 to 3, characterized in that, The detection device also includes a housing, and the fluid input mechanism and the valve are located inside the housing; the outer surface of the housing is provided with a detection plane, and the first end of the pin structure extends through the detection plane to the outside of the housing.

5. The detection device as described in claim 4, characterized in that, It also includes a material ejection structure, which includes an ejection plate and a driving assembly. The ejection plate is disposed on the detection plane, and the first end of the pin structure passes through the ejection plate. The driving assembly is used to drive the ejection plate to move along the length direction of the pin structure, and the ejection plate abuts against the workpiece to be tested.

6. The detection device as described in claim 5, characterized in that, The drive assembly further includes a cylinder and a transmission component. The cylinder is disposed inside the housing. The transmission component is connected to the telescopic rod of the cylinder. The two ends of the transmission component are respectively provided with a first extension shaft and a second extension shaft. The end of the first extension shaft is connected to one end of the ejector plate, and the end of the second extension shaft is connected to the end of the ejector plate away from the first extension shaft.

7. The detection device as described in claim 6, characterized in that, The drive assembly also includes a cylinder mounting plate located below the detection plane, and the cylinder is connected to the cylinder mounting plate.

8. The detection device as described in claim 4, characterized in that, The detection device further includes a start button, which is located on the outer surface of the housing. The start button is electrically connected to the valve, the fluid input mechanism, the differential pressure detection device, and the indication device, respectively; and / or, The detection device also includes an emergency stop button, which is located on the outer surface of the housing and is electrically connected to the valve, the fluid input mechanism, the differential pressure detection device, and the prompting device.

9. The detection device as described in claim 4, characterized in that, The detection device includes several pin structures, several valves, several differential pressure detection devices, and several prompting devices. Each pin structure and each valve are connected in a one-to-one correspondence. The end of each valve away from the pin structure is connected to the fluid input mechanism. Each differential pressure detection device is used to acquire the fluid pressure change value of the test piece on the corresponding pin structure. Each prompting device is used to output corresponding qualified prompt information or warning prompt information based on whether the corresponding fluid pressure change value exceeds the fluid pressure change threshold.

10. The detection device as described in claim 2, characterized in that, The information transmitting module includes a speaker and / or indicator lights and / or a display screen; and / or, The differential pressure detection device includes a differential pressure sensor.

Images