Intelligent detection and sorting device and method for air tightness of valve seat of precision one-way valve

Abstract

The application discloses a kind of precision check valve valve seat airtightness intelligent detection and sorting device and method, by airtightness detection mechanism to valve seat carries out airtightness detection, airtightness detection mechanism includes detection placement seat, pressure detection module, negative pressure generating device;Valve seat is placed in detection placement seat, and valve ball is placed on valve seat;Start negative pressure generating device, make valve seat inside produce negative pressure, valve ball suction is tight on valve seat;When the pressure detected by pressure detection module reaches set value, keep the pressure;In the process of natural pressure relief, obtain pressure change curve by pressure detection module, determine the airtightness grade of valve seat by pressure change curve, and classify valve seat.The method can directly detect the airtightness of valve seat, the detection process is simple, provides quality assurance for subsequent production check valve, reduces repair process, can well determine the airtightness grade of valve seat, classifies valve seat, improves the production quality of check valve.

Description

Technical Field

[0001] This invention relates to the field of one-way valve airtightness testing technology, specifically to an intelligent airtightness testing and sorting device and method for a precision one-way valve seat. Background Technology

[0002] A check valve, also known as a non-return valve, is used in hydraulic systems to prevent the reverse flow of oil or in pneumatic systems to prevent the reverse flow of compressed air. A check valve typically consists of a valve seat and a valve ball. During forward flow, the valve ball separates from the valve seat, allowing fluid flow. During reverse flow, the valve ball presses against the valve seat to seal it. After production, the airtightness of the valve seat needs to be tested. Current testing methods typically involve manual inspection. An air-filling device is connected to the inlet of the check valve, and air is introduced into the valve. The valve ball closes the valve seat, and the worker connects a pressure gauge to the outlet to monitor for gas flow, thus determining the check valve's airtightness. However, existing airtightness testing methods have the following shortcomings:

[0003] In existing technologies, the entire check valve is tested. If the valve seat is not airtight, the valve seat needs to be disassembled and replaced, which makes the subsequent process very complicated. In addition, each check valve needs to be connected to the inflation equipment and pressure gauge during testing, which is very troublesome. During the testing process, it is also impossible to accurately determine the airtightness level of the valve seat or classify the valve seats. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems and provide an intelligent detection and sorting method for the airtightness of a precision check valve seat. This intelligent detection and sorting method can directly detect the airtightness of the valve seat. The detection process is simple, provides quality assurance for subsequent production of check valves, reduces rework processes, can effectively determine the airtightness level of the valve seat, classify the valve seats, and improve the production quality of check valves.

[0005] Another objective of this invention is to provide an intelligent detection and sorting device for the airtightness of a precision one-way valve seat.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A method for intelligent airtightness detection and sorting of precision one-way valve seats, comprising an airtightness detection mechanism for testing the airtightness of the valve seats, the airtightness detection mechanism including a detection placement seat, a pressure detection module, and a negative pressure generating device connected sequentially via air pipes; the intelligent airtightness detection and sorting method includes:

[0008] (1) Place the valve seat of the one-way valve in the test placement seat and place the valve ball of the one-way valve on the valve seat;

[0009] (2) Start the negative pressure generating device to generate negative pressure inside the valve seat, and the valve ball is sucked tightly on the valve seat; when the pressure detected by the pressure detection module reaches the set value, maintain the pressure and release pressure naturally through the gap between the valve ball and the valve seat;

[0010] (3) During the natural pressure relief process, the pressure detection module detects the pressure change in real time and obtains the pressure change curve. The pressure change curve is used to detect and determine the airtightness level of the valve seat, and the valve seat is classified according to the airtightness level.

[0011] The working principle of the above-mentioned intelligent detection and sorting method for the airtightness of precision one-way valve seats is as follows:

[0012] The negative pressure generating device can generate negative pressure. During testing, the negative pressure generating device works, and the valve seat (the valve seat to be tested), the test placement seat, the pressure detection module, and the negative pressure generating device are interconnected. The negative pressure is used to test the airtightness of the valve seat. The valve seat generates negative pressure, and the pressure change curve during the natural pressure relief process is detected by the pressure detection module to determine the airtightness level of the valve seat, thereby classifying the valve seat.

[0013] In a preferred embodiment of the present invention, step (3) specifically includes the following steps:

[0014] (A3.1) Data Acquisition:

[0015] Record the pressure values ​​over a period of time, using a frequency of f, to obtain a set of time series pressure value data;

[0016] (A3.2) Establish a pressure change curve using a set of time series pressure data;

[0017] (A3.3) Calculate the slope of the pressure change curve;

[0018] (A3.4) Set the slope grading threshold;

[0019] (A3.5) Compare the slope with the slope classification threshold, determine the airtightness level based on the comparison result, and classify the valve seat.

[0020] Preferably, step (3) specifically includes the following steps:

[0021] (B3.1) Data Acquisition:

[0022] The pressure detection module detects pressure changes in real time and establishes a time-related pressure change curve. When the pressure rises from the set value to the reference value, the time taken for the pressure to rise from the set value to the reference value is obtained from the pressure change curve.

[0023] (B3.2) Set time-level thresholds;

[0024] (B3.3) Compare the time taken for the pressure to rise from the set value to the reference value with the time grading threshold. Based on the comparison result, determine the airtightness level and classify the valve seat.

[0025] Preferably, after step (3), step (4) is further included, wherein step (4) is:

[0026] Remove the valve seat from the test placement seat and place it in the area corresponding to the airtightness level. Repeat steps (1)-(3) for the next valve seat test. In the above steps, after removing the valve seat from the test placement seat, separate the valve seat from the valve ball and place the valve seat in the area corresponding to the airtightness level. Repeat steps (1)-(3) for the next valve seat test. The original valve ball can be used and placed on the valve seat.

[0027] Preferably, the pressure detection module includes a pressure gauge and a data processing unit, and the negative pressure generating device includes a negative pressure tank, a negative pressure switch, and a negative pressure generator. The pressure gauge is connected to the data processing unit, and the air pipe sequentially connects the detection placement seat, pressure gauge, negative pressure tank, negative pressure switch, and negative pressure generator. In the above structure, the negative pressure generator can generate negative pressure. During detection, the negative pressure generator operates, the negative pressure switch is turned on, and the valve seat (the valve seat to be tested), detection placement seat, pressure gauge, negative pressure tank, negative pressure switch, and negative pressure generator are interconnected. The valve seat generates negative pressure. When the pressure displayed by the pressure gauge reaches the set value, the pressure is maintained, and the negative pressure switch is turned off. During the natural pressure relief process, the pressure gauge records the pressure value of the valve seat in real time and sends the pressure value to the data processing unit. The data processing unit processes the pressure value, establishes a pressure change curve, and uses the pressure change curve to detect and determine the airtightness level of the valve seat, and classifies the valve seat according to the airtightness level. The negative pressure tank can stabilize the air pressure and ensure detection accuracy.

[0028] An intelligent airtightness detection and sorting device for a precision one-way valve seat includes a frame, an automatic loading and unloading sorting device mounted on the frame, and the airtightness detection mechanism; wherein...

[0029] The automatic loading and unloading sorting device includes a transfer tray, a rotary drive mechanism for driving the transfer tray to rotate, a conveying mechanism for conveying valve seats onto the transfer tray, multiple collection channels below the transfer tray for collecting valve seats after testing, and a transport mechanism. The transport mechanism is used to transport valve seats in the transfer tray to the testing placement seat of the airtightness testing mechanism and to transport valve seats in the testing placement seat to the collection channels. The transport mechanism is equipped with a valve ball adsorption assembly for adsorbing valve balls, and the valve balls move with the transport mechanism.

[0030] The working principle of the above-mentioned intelligent detection and sorting device for the airtightness of the precision one-way valve seat is as follows:

[0031] The conveying mechanism transports the produced valve seats to the transfer tray. The rotary drive mechanism drives the transfer tray to rotate, moving the valve seats to the loading station. The handling mechanism transports the valve seats to the testing placement seat. During this process, the valve ball adsorption assembly releases the adsorbed valve ball and places it on the valve seat. The airtightness testing mechanism performs an airtightness test on the valve seat of the one-way valve. After the test is completed, the handling mechanism and the valve ball adsorption assembly respectively move the valve seat and the valve ball away from the testing placement seat. According to the airtightness level of the valve seat, the handling mechanism transports the valve seat to the collection channel of the corresponding airtightness level for collection. During this process, the valve ball adsorption assembly adsorbs the valve ball. When the valve seat is moved away, the valve ball separates from the valve seat.

[0032] Preferably, the detection placement seat is located below the transfer tray. The transfer tray has multiple valve seat placement slots for placing valve seats and multiple clearance notches for avoiding the conveying mechanism. The multiple valve seat placement slots and clearance notches are alternately arranged and evenly distributed along the circumference. In the above structure, the multiple valve seat placement slots can improve the feeding efficiency. When one of the valve seat placement slots in the transfer tray moves to the position corresponding to the conveying mechanism, the clearance notch is also located above the detection placement seat. The conveying mechanism moves the valve seat on the valve seat placement slot to the detection placement seat. During this process, the valve ball adsorption component will release the adsorbed valve ball and place it on the valve seat. The clearance notch plays a good role in avoiding the conveying mechanism, making the conveying mechanism travel shorter. After the airtightness detection mechanism completes the test, the conveying mechanism and the valve ball adsorption component will move the valve seat and valve ball away together. When the valve seat is placed in the collection channel, the valve ball will separate from the valve seat.

[0033] Preferably, the conveying mechanism includes a conveying mounting plate rotatably mounted on the frame, a vertical adsorption conveying unit mounted on the conveying mounting plate, and a rotary conveying drive mechanism for driving the conveying mounting plate to rotate; the vertical adsorption conveying unit includes a valve seat suction cup and a vertical drive mechanism mounted on the conveying mounting plate for driving the valve seat suction cup to move up and down; the valve ball adsorption assembly is disposed inside the valve seat suction cup. During operation, when the valve seat in one of the valve seat placement slots on the transfer tray moves directly below the valve seat suction cup, the vertical drive mechanism drives the valve seat suction cup and the valve ball adsorption assembly to move downwards together, adsorbing the valve seat. Then, it drives the valve seat suction cup to move upwards, causing the valve seat to move upwards as well. During this process, the valve ball is adsorbed in the valve ball adsorption assembly. The rotary conveying drive mechanism drives the conveying mounting plate, the vertical adsorption conveying unit, and the valve seat to rotate together. When the valve seat suction cup moves directly above the detection placement seat, the vertical drive mechanism drives the valve seat suction cup to move downwards, placing the valve seat on the detection placement seat. At this time, the valve ball adsorption assembly releases the valve ball, and the valve ball falls onto the valve seat. The vertical drive mechanism then drives the valve seat suction cup and the valve ball adsorption assembly to move upwards together. After the inspection is completed, the vertical drive mechanism, in conjunction with the rotary conveying drive mechanism, drives the valve seat suction cup and valve ball adsorption assembly to move the valve seat and valve ball away to the upper part of the corresponding collection channel. The valve seat suction cup releases the valve seat, the valve seat and valve ball separate, and the valve seat falls into the collection channel for collection. The vertical adsorption conveying unit and valve ball adsorption assembly return to their original positions. At this time, the rotary drive mechanism drives the transfer tray to rotate until the empty valve seat placement slot moves to the position corresponding to the conveying mechanism. At this time, the next valve seat placement slot with a valve seat is also located directly below the vertical adsorption conveying unit (valve seat suction cup), preparing for the next valve seat to be loaded. The conveying mechanism transports the processed valve seat to the empty valve seat placement slot, realizing automated loading and unloading and improving inspection efficiency.

[0034] Preferably, there are two vertical adsorption and conveying units and two valve ball adsorption assemblies, with each unit corresponding to the other. The two vertical adsorption and conveying units improve the efficiency of valve seat loading and unloading. During operation, the two vertical adsorption and conveying units are in their initial positions. When the valve seat in one of the valve seat placement slots on the transfer tray moves counter-clockwise with the transfer tray to directly below the valve seat suction cup closest to the conveying mechanism (the rightmost valve seat suction cup in the front view), a valve ball is placed on that valve seat. At this time, the other valve seat suction cup is also directly above the detection placement seat, which now has a valve seat and a valve ball. After detection, the two vertical drive mechanisms drive the two valve seat suction cups and the valve ball adsorption assemblies downwards. One valve seat suction cup adsorbs the valve seat in the valve seat placement slot, and its internal valve ball adsorption assembly simultaneously adsorbs the valve ball on that valve seat; the other valve seat suction cup... The valve seat on the placement seat is adsorbed, and the valve ball adsorption assembly inside it also adsorbs the valve ball on the valve seat. Then, two vertical drive mechanisms drive two valve seat suction cups to move upward, causing the valve seat, valve ball adsorption assembly, and valve ball to move upward together. The rotary conveying drive mechanism drives the conveying mounting plate, two vertical adsorption conveying units, two valve seats, two valve ball adsorption assemblies, and two valve balls to rotate clockwise together. Until the valve seat suction cup closest to the conveying mechanism moves directly above the detection placement seat, the vertical drive mechanism drives the valve seat suction cup to move downward, and the valve seat suction cup places the valve seat on the detection placement seat. The valve ball adsorption assembly inside it also releases the valve ball, and the valve ball falls onto the valve seat. Subsequently, the vertical drive... Driven by the mechanism, the valve seat suction cup and valve ball adsorption assembly move upwards, and the airtightness testing mechanism performs an airtightness test on the valve seat. The rotational transport drive mechanism drives two vertical adsorption transport units to rotate clockwise, and the valve ball adsorption assembly also rotates accordingly, until another vertical adsorption transport unit with the tested valve seat moves directly above the corresponding level collection channel. The valve ball adsorption assembly on this vertical adsorption transport unit adsorbs the valve ball, and the tested valve seat and valve ball are together directly above the collection channel. The valve seat suction cup releases the tested valve seat, the valve seat and valve ball separate, the valve seat falls into the collection channel for collection, and the valve ball remains adsorbed on the valve ball adsorption assembly. The rotational transport drive mechanism drives two drive transport units to rotate clockwise. The mounting plate, two vertical adsorption and conveying units, two valve ball adsorption assemblies, and one valve ball rotate counterclockwise together until the vertical adsorption and conveying unit with the valve ball adsorbed inside moves to the top of the valve seat placement slot between the collection channel and the detection placement seat, which is closest to the detection placement seat. The valve seat placement slot has an undetected valve seat. The vertical adsorption and conveying unit above it drives the valve ball adsorption assembly to move downward. The valve ball adsorption assembly places the valve ball on the valve seat. The vertical adsorption and conveying unit drives the valve ball adsorption assembly to move upward. Then, the conveying drive mechanism rotates to drive the two drive conveying mounting plates, two vertical adsorption and conveying units, and two valve ball adsorption assemblies to rotate counterclockwise together, returning to their original positions (initial positions).At this point, the rotary drive mechanism drives the transfer tray to rotate counterclockwise until the empty valve seat placement slot moves to the position corresponding to the conveying mechanism. The valve seat with the valve ball just placed inside will then move with the placement slot to directly below the valve seat suction cup closest to the conveying mechanism, avoiding the gap located directly above the detection placement seat. The conveying mechanism then transports the processed valve seat to the empty valve seat placement slot. This process is repeated to achieve continuous automatic feeding and unloading.

[0035] Preferably, an adaptive elastic component is provided between the valve ball adsorption assembly and the valve seat suction cup. The valve ball adsorption assembly includes a valve ball suction cup disposed inside the valve seat suction cup and a negative pressure tube connected to the valve ball suction cup. A step is provided inside the valve seat suction cup. The adaptive elastic component includes an upper limit plate disposed at the upper end of the negative pressure tube, a lower limit plate disposed at the lower end of the negative pressure tube, and an adaptive spring sleeved on the negative pressure tube. One end of the adaptive spring acts on the lower end of the step, and the other end acts on the lower limit plate. The upper limit plate is located at the upper end of the step. In the above structure, the upper limit plate and the step can play a limiting role, preventing the valve ball adsorption assembly from falling out of the valve seat suction cup. The valve ball adsorption assembly can slide up and down along the axis of the valve seat suction cup. When the valve seat suction cup adsorbs the valve seat, the elastic force of the adaptive spring causes the valve ball suction cup to press firmly against the valve ball, allowing the valve ball suction cup to better adsorb the valve ball.

[0036] Preferably, the conveying mechanism includes a conveyor belt and a push cylinder disposed at the end of the conveyor belt and perpendicular to the conveyor belt. The produced valve seats are conveyed to their ends via the conveyor belt. The rotary drive mechanism drives the transfer tray to rotate until the empty valve seat placement slot moves to the position corresponding to the end of the conveyor belt. At this point, the movement stops, and the push cylinder pushes the valve seats on the end of the conveyor belt into the valve seat placement slot, completing the loading of the transfer tray.

[0037] Preferably, the transfer tray is provided with a positioning element for positioning the valve seat in the valve seat placement slot. The positioning element is slidably mounted on the transfer tray, and a return spring is provided between the transfer tray and the positioning element. The return spring causes the positioning element to move upward to block and limit the valve seat in the valve seat placement slot. The frame is provided with a guide block at a position corresponding to the end of the conveyor belt. The guide block is used to guide the positioning element away from the valve seat placement slot. In the above structure, when the valve seat placement slot moves to the position corresponding to the end of the conveyor belt, the guide block will overcome the elastic force of the return spring and guide the positioning element away from the valve seat placement slot. At this time, the push cylinder can smoothly push the valve seat on the end of the conveyor belt into the valve seat placement slot. When the transfer tray rotates, the valve seat placement slot moves away from the position corresponding to the end of the conveyor belt, and the guide block will separate from the positioning element. Under the elastic force of the return spring, the positioning element resets and blocks and limits the valve seat on the valve seat placement slot, preventing the valve seat from detaching from the valve seat placement slot under the action of centrifugal force.

[0038] Preferably, the positioning component includes a mounting part, two positioning pins disposed on the mounting part, a guide post, and a pushing part; the return spring is sleeved on the guide post, the guide post is slidably connected to the transfer tray, the positioning pins extend upward into the valve seat placement groove, and the pushing part is used to contact the guide block, the guide block being a conical guide block. In the above structure, the positioning pin is located at the opening edge of the valve seat placement groove, mainly to prevent the valve seat from detaching from the valve seat placement groove under the action of centrifugal force. When the positioning component rotates to the position corresponding to the end of the conveyor belt, the pushing part will contact the guide block, and the conical guide block will guide the pushing part to move downward, thereby driving the entire positioning component to move downward and guiding the positioning pin away from the valve seat placement groove.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. The airtightness intelligent detection and sorting method in this invention uses negative pressure to detect the airtightness of the valve seat. By using a pressure detection module to detect the pressure change curve during the natural pressure relief process, the airtightness level of the valve seat is determined, and the valve seat is then classified. This invention directly detects the valve seat and completes the detection before assembly, which can reduce rework processes and provide quality assurance for the subsequent production of check valves.

[0041] 2. The airtightness intelligent detection and sorting method in this invention only requires placing the valve seat on the detection placement seat and the valve ball on the valve seat. The detection can be achieved through the pressure detection module and the negative pressure generating device. There is no need to connect a one-way valve, making the detection process simpler and saving time and effort.

[0042] 3. The intelligent airtightness detection and sorting method in this invention determines the airtightness level of the valve seat through the pressure change curve, thereby classifying the valve seats and improving the production quality of one-way valves.

[0043] 4. The airtightness intelligent detection and sorting device in this invention can automatically load and unload valve seats and valve balls when performing airtightness detection on valve seats, with high detection efficiency and a high degree of automation. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the airtightness testing mechanism in this invention.

[0045] Figure 2 This is a front view of the airtightness intelligent detection and sorting device of the present invention.

[0046] Figure 3 This is a right view of the airtightness intelligent detection and sorting device of the present invention.

[0047] Figure 4 This is a top view of the airtightness intelligent detection and sorting device of the present invention.

[0048] Figure 5 This is a three-dimensional structural diagram of the airtightness intelligent detection and sorting device of the present invention.

[0049] Figure 6 This is a three-dimensional structural diagram of a portion of the airtightness testing mechanism in this invention mounted on a frame.

[0050] Figure 7 This is a cross-sectional view of the detection placement seat in this invention.

[0051] Figure 8 This is a three-dimensional structural diagram of the frame, the transfer tray with the valve seat, and the rotary drive mechanism in this invention.

[0052] Figure 9 This is a three-dimensional structural diagram of the frame, the transfer tray with the valve seat, and the rotary drive mechanism in this invention from another perspective.

[0053] Figure 10 This is a top view of the transfer tray in this invention.

[0054] Figure 11 This is a three-dimensional structural diagram of the transfer tray and rotary drive mechanism in this invention.

[0055] Figure 12 This is a three-dimensional structural diagram of the conveying mechanism in this invention.

[0056] Figure 13 This is a three-dimensional structural diagram of the vertical adsorption and transport unit in this invention.

[0057] Figure 14 This is a schematic diagram of the internal structure of the valve seat suction cup, valve ball adsorption assembly, and adaptive elastic assembly in this invention.

[0058] Figure 15 This is a three-dimensional structural diagram of the valve ball adsorption component and the adaptive elastic component in this invention.

[0059] Figure 16 This is a three-dimensional structural diagram of the conveying mechanism in this invention.

[0060] Figure 17 This is a three-dimensional structural diagram of the positioning element in this invention. Detailed Implementation

[0061] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0062] Example 1

[0063] See Figures 1-7 The main factors affecting the airtightness of the valve seat of a one-way valve are the roughness and roundness of the conical surface on the valve seat that contacts the valve ball. This embodiment discloses an intelligent detection and sorting method for the airtightness of a precision one-way valve seat. The airtightness of the valve seat 100 of the one-way valve is detected by an airtightness detection mechanism 1. The airtightness detection mechanism 1 includes a detection placement seat 1-2, a pressure detection module, and a negative pressure generating device, all connected sequentially via an air pipe 1-1. The intelligent airtightness detection and sorting method includes:

[0064] (1) Place the valve seat 100 of the check valve in the detection placement seat 1-2 and place the valve ball 200 of the check valve on the valve seat 100; in this step, the valve seat 100 of the check valve can be placed in the detection placement seat 1-2 first, and then the valve ball 200 of the check valve can be placed on the valve seat 100; or the valve seat 100 of the check valve can be placed in the detection placement seat 1-2 at the same time as the valve ball 200 of the check valve is placed on the valve seat 100.

[0065] (2) Start the negative pressure generating device to generate negative pressure inside the valve seat 100, and the valve ball 200 is sucked tightly on the valve seat 100; when the pressure detected by the pressure detection module reaches the set value, maintain the pressure and release pressure naturally through the gap between the valve ball 200 and the valve seat 100.

[0066] (3) During the natural pressure relief process, the pressure detection module detects the pressure change in real time and obtains the pressure change curve. The pressure change curve is used to detect and determine the airtightness level of the valve seat 100, and the valve seat 100 is classified according to the airtightness level.

[0067] See Figures 1-7 Step (3) specifically includes the following steps:

[0068] (A3.1) Data Acquisition:

[0069] The pressure values ​​are recorded over a period of time T0, using a frequency of f, to obtain a time series of pressure value data; specifically, f is 10Hz, and the pressure values ​​are sampled ten times per second; the period T0 is 30s.

[0070] (A3.2) Establish a pressure change curve using a set of time series pressure data;

[0071] (A3.3) Calculate the slope of the pressure change curve; the slope can be the exponential fitting slope, and the smaller the slope k, the better the airtightness of the valve seat;

[0072] (A3.4) Set slope grading thresholds; there are multiple slope grading thresholds. The air tightness level is divided into four levels: excellent (A), good (B), medium (C), and poor (D). The slope grading thresholds are Δk1, Δk2, and Δk3 in ascending order.

[0073] (A3.5) Compare the slope with the slope grading threshold, determine the airtightness level based on the comparison result, and classify the valve seat; when k≤Δk1, the airtightness level is excellent (A), and the valve seat is classified as excellent; when Δk1<k≤Δk2, the airtightness level is good (B), and the valve seat is classified as good; when Δk2<k≤Δk3, the airtightness level is medium (C), and the valve seat is classified as medium; when k>Δk3, the airtightness level is poor (D), and the valve seat is classified as poor.

[0074] See Figures 1-7 The pressure detection module includes a pressure gauge 1-3 and a data processing unit. The negative pressure generating device includes a negative pressure tank 1-4, a negative pressure switch 1-5, and a negative pressure generator 1-6. The pressure gauge 1-3 is connected to the data processing unit. The air pipe 1-1 connects the detection placement seat 1-2, the pressure gauge 1-3, the negative pressure tank 1-4, the negative pressure switch 1-5, and the negative pressure generator 1-6 in sequence. In the above structure, the negative pressure generator 1-6 can generate negative pressure. During testing, the negative pressure generator 1-6 operates, and the negative pressure switch 1-5 is turned on. The valve seat 100 (the valve seat to be tested), the test placement seat 1-2, the pressure gauge 1-3, the negative pressure tank 1-4, the negative pressure switch 1-5, and the negative pressure generator 1-6 are interconnected. The valve seat 100 generates negative pressure. When the pressure displayed by the pressure gauge 1-3 reaches the set value, the pressure is maintained, and the negative pressure switch 1-5 is turned off. During the natural pressure relief process, the pressure gauge 1-3 records the pressure value of the valve seat 100 in real time and sends the pressure value to the data processing unit. The data processing unit processes the pressure value, establishes a pressure change curve, and uses the pressure change curve to detect and determine the airtightness level of the valve seat, and classifies the valve seat according to the airtightness level. The negative pressure tank 1-4 can stabilize the air pressure to ensure the detection accuracy.

[0075] The data processing unit can be a computer, microcontroller, chip, or other data processing device.

[0076] See Figures 1-7 After step (3), there is also step (4), which is:

[0077] Remove the valve seat 100 from the test placement seat 1-2 and place the valve seat 100 in the area corresponding to the airtightness level. Repeat steps (1)-(3) when testing the next valve seat 100. In the above steps, after removing the valve seat 100 from the test placement seat 1-2, separate the valve seat 100 from the valve ball 200 and place the valve seat 100 in the area corresponding to the airtightness level. Repeat steps (1)-(3) when testing the next valve seat 100. The original valve ball 200 can be used and placed on the valve seat 100.

[0078] See Figures 1-7 The detection placement seat 1-2 is provided with a groove 1-21 for placing the valve seat 100. A sealing ring 1-7 is provided at the bottom of the groove 1-21, and the bottom of the groove 1-21 communicates with the air pipe 1-1. The sealing ring 1-7 ensures the airtightness between the valve seat 100 and the detection placement seat 1-2, thereby ensuring the accuracy of the detection results. The sealing ring 1-7 is provided with a stepped groove with an inclined side surface. Its purpose is to further improve the airtightness.

[0079] See Figures 1-7 This embodiment also discloses an intelligent airtightness detection and sorting device for a precision one-way valve seat, including a frame 2, an automatic loading and unloading sorting device mounted on the frame 2, and the airtightness detection mechanism 1.

[0080] See Figures 1-15 The automatic loading and unloading sorting device includes a transfer tray 3, a rotary drive mechanism 4 for driving the transfer tray 3 to rotate, a conveying mechanism 5 for conveying valve seats 100 to the transfer tray 3, a plurality of collection channels 6 arranged below the transfer tray 3 for collecting valve seats 100 after testing, and a conveying mechanism 7; the conveying mechanism 7 is used to convey the valve seats 100 in the transfer tray 3 to the testing placement seat 1-2 of the airtightness testing mechanism 1 and to convey the valve seats 100 in the testing placement seat 1-2 to the collection channels 6; the conveying mechanism 7 is provided with a valve ball adsorption assembly 8 for adsorbing valve balls 200, and the valve balls 200 move with the conveying mechanism 7.

[0081] See Figures 1-15 The working principle of the aforementioned intelligent detection and sorting device for the airtightness of the precision one-way valve seat is as follows:

[0082] The conveying mechanism 5 transports the produced valve seat 100 to the transfer tray 3. The rotary drive mechanism 4 drives the transfer tray 3 to rotate, moving the valve seat 100 to the loading station (i.e., the position corresponding to the handling mechanism 7). The handling mechanism 7 transports the valve seat 100 to the testing placement seat 1-2. During this process, the valve ball adsorption assembly 8 releases the adsorbed valve ball 200 and places it on the valve seat 100. The airtightness testing mechanism 1 performs an airtightness test on the valve seat 100 of the one-way valve. After the test is completed, the handling mechanism 7 and the valve ball adsorption assembly 8 respectively move the valve seat 100 and the valve ball 200 away from the testing placement seat 1-2. According to the airtightness level of the valve seat 100, the handling mechanism 7 transports the valve seat 100 to the collection channel 6 of the corresponding airtightness level for collection. During this process, the valve ball adsorption assembly 8 adsorbs the valve ball 200. When the valve seat 100 is moved away, the valve ball 200 will separate from the valve seat 100.

[0083] See Figures 1-11 The detection placement seat 1-2 is located below the transfer tray 3 and is mounted on the frame 2. The transfer tray 3 is provided with a plurality of valve seat placement slots 3-1 for placing valve seats 100 and a plurality of clearance notches 3-2 for avoiding the transport mechanism 7. The plurality of valve seat placement slots 3-1 and clearance notches 3-2 are alternately arranged and evenly distributed along the circumferential direction. In the above structure, setting multiple valve seat placement slots 3-1 can improve the feeding efficiency. When one of the valve seat placement slots 3-1 in the transfer tray 3 moves to the position corresponding to the conveying mechanism 5, the clearance notch 3-2 is also located above the detection placement seat 1-2. The conveying mechanism 7 transports the valve seat 100 on the valve seat placement slot 3-1 to the detection placement seat 1-2. During this process, the valve ball adsorption assembly 8 will release the adsorbed valve ball 200 and place it on the valve seat 100. The clearance notch 3-2 plays a good role in avoiding the conveying mechanism 7, making the conveying mechanism 7 travel shorter. After the airtightness detection mechanism 1 completes the detection, the conveying mechanism 7 and the valve ball adsorption assembly 8 will move the valve seat 100 and the valve ball 200 away together. When the valve seat 100 is placed in the collection channel 6, the valve ball 200 will separate from the valve seat 100.

[0084] See Figures 1-11 The transfer tray 3 is rotatably mounted on the frame 2. The rotary drive mechanism 4 includes a rotary drive motor, the main shaft of which is connected to the transfer tray 3. There are six valve seat placement slots 3-1 and six clearance notches 3-2. The valve seat placement slots 3-1 are horizontally arranged U-shaped slots, and the valve seat placement slots 3-1 and clearance notches 3-2 are located around the periphery of the transfer tray 3.

[0085] See Figures 1-13The conveying mechanism 7 includes a conveying mounting plate 71 rotatably mounted on the frame 2, a vertical adsorption conveying unit 72 mounted on the conveying mounting plate 71, and a rotational conveying drive mechanism 73 for driving the conveying mounting plate 71 to rotate; the vertical adsorption conveying unit 72 includes a valve seat suction cup 72-1 and a vertical drive mechanism 72-2 mounted on the conveying mounting plate 71 for driving the valve seat suction cup 72-1 to move up and down; the valve ball adsorption assembly 8 is disposed inside the valve seat suction cup 72-1. During operation, when the valve seat 100 in one of the valve seat placement slots 3-1 on the transfer tray 3 moves directly below the valve seat suction cup 72-1, the vertical drive mechanism 72-2 drives the valve seat suction cup 72-1 and the valve ball adsorption assembly 8 to move downwards together, adsorbing the valve seat 100. Then, it drives the valve seat suction cup 72-1 to move upwards, causing the valve seat 100 to move upwards as well. During this process, the valve ball 200 is adsorbed in the valve ball adsorption assembly 8. The rotational conveying drive mechanism 73 drives the conveying mounting plate 71, the vertical adsorption conveying unit 72, the valve seat 100, and the valve ball adsorption assembly 8 to rotate together. When the valve seat suction cup 72-1... When the valve seat 72-1 moves to directly above the detection placement seat 1-2, the vertical drive mechanism 72-2 drives the valve seat suction cup 72-1 to move downwards, placing the valve seat 100 on the detection placement seat 1-2. At this time, the valve ball adsorption assembly 8 releases the valve ball 200, and the valve ball 200 also falls onto the valve seat 100. (During this process, the valve seat suction cup 72-1 can release the valve seat 100 first, and then the valve ball adsorption assembly 8 can release the valve ball 200; or the valve seat suction cup 72-1 can release the valve seat 100 at the same time as the valve ball adsorption assembly 8 releases the valve ball 200; or the valve ball adsorption assembly 8 can release the valve ball 200 first, and then the valve ball 200 falls onto the valve seat 100.) The valve seat 100 falls onto the valve seat 100, and then the valve seat suction cup 72-1 releases the valve seat 100, causing the valve seat 100 and valve ball 200 to move together and be placed on the detection placement seat 1-2. The vertical drive mechanism 72-2 drives the valve seat suction cup 72-1 and the valve ball adsorption assembly 8 to move upward together. After the detection is completed, the vertical drive mechanism 72-2, in conjunction with the rotational transport drive mechanism 73, drives the valve seat suction cup 72-1 and the valve ball adsorption assembly 8 to move the valve seat 100 and valve ball 200 away to the upper part of the corresponding level collection channel 6. The valve seat suction cup 72-1 releases the valve seat 100, and the valve seat 100 and valve ball 200 move together. 0. Separation occurs, and valve seat 100 falls into collection channel 6 for collection. Vertical adsorption and conveying unit 72 and valve ball adsorption assembly 8 return to their original positions. At this time, rotary drive mechanism 4 drives transfer tray 3 to rotate until the empty valve seat placement slot 3-1 moves to the position corresponding to conveying mechanism 5. At this time, the next valve seat placement slot 3-1 containing valve seat 100 is also located directly below vertical adsorption and conveying unit 72 (valve seat suction cup 72-1), preparing for the next valve seat 100 to be loaded. Conveying mechanism 5 transports the processed valve seat 100 to the empty valve seat placement slot 3-1, realizing automated loading and unloading and improving detection efficiency.

[0086] See Figures 1-12There are two vertical adsorption and conveying units 72 and two valve ball adsorption assemblies 8, with each vertical adsorption and conveying unit 72 and valve ball adsorption assembly 8 arranged in a one-to-one correspondence. The two vertical adsorption and conveying units 72 improve the efficiency of loading and unloading the valve seat 100. During operation, the two vertical adsorption and conveying units 72 are in their initial positions. When the valve seat 100 in one of the valve seat placement slots 3-1 on the transfer tray 3 moves counterclockwise with the transfer tray 3 to the valve seat suction cup 72-1 closest to the conveying mechanism 5 (as seen in the front view, i.e.,...). Figure 2See, when the valve seat suction cup 72-1 on the right is directly below it, the valve ball 200 is already placed on the valve seat 100; at this time, the other valve seat suction cup 72-1 is also directly above the detection placement seat 1-2. At this time, the detection placement seat 1-2 already has the valve seat 100 and the valve ball 200. After the detection is completed, the two vertical drive mechanisms 72-2 drive the two valve seat suction cups 72-1 and the valve ball adsorption assembly 8 to move downward together. One valve seat suction cup 72-1 adsorbs the valve seat 100 on the valve seat placement groove 3-1, and the valve ball adsorption assembly 8 inside it also simultaneously adsorbs the valve ball 200 on the valve seat 100. Adsorption; another valve seat suction cup 72-1 adsorbs the valve seat 100 on the detection placement seat 1-2, and the valve ball adsorption assembly 8 inside it also adsorbs the valve ball 200 on the valve seat 100; then the two vertical drive mechanisms 72-2 drive the two valve seat suction cups 72-1 to move upward, causing the valve seat 100, valve ball adsorption assembly 8, and valve ball 200 to move upward together; the rotary conveying drive mechanism 73 drives the conveying mounting plate 71, the two vertical adsorption conveying units 72, the two valve seats 100, the two valve ball adsorption assemblies 8, and the two valve balls 200 to rotate clockwise together until they are closest to the conveyor. When one of the valve seat suction cups 72-1 of mechanism 5 moves to directly above the detection placement seat 1-2, the vertical drive mechanism 72-2 drives the valve seat suction cup 72-1 to move downwards. The valve seat suction cup 72-1 places the valve seat 100 on the detection placement seat 1-2, and the valve ball adsorption assembly 8 inside it also releases the valve ball 200, which falls onto the valve seat 100. Subsequently, driven by the vertical drive mechanism 72-2, the valve seat suction cup 72-1 and the valve ball adsorption assembly 8 move upwards, and the airtightness detection mechanism 1 performs an airtightness test on the valve seat 100; the rotation and conveying drive mechanism 73 drives two vertical... The adsorption and transport unit 72 rotates clockwise, and the valve ball adsorption assembly 8 also rotates accordingly until another vertical adsorption and transport unit 72 with the detected valve seat 100 moves to the collection channel 6 above the corresponding level. The valve ball adsorption assembly 8 on the vertical adsorption and transport unit 72 adsorbs the valve ball 200. The detected valve seat 100 and the valve ball 200 are located together above the collection channel 6. The valve seat suction cup 72-1 releases the detected valve seat 100, the valve seat 100 separates from the valve ball 200, the valve seat 100 falls into the collection channel 6 for collection, and the valve ball 200 is still adsorbed on the valve ball adsorption assembly 8.The rotating transport drive mechanism 73 drives two drive transport mounting plates 71, two vertical adsorption transport units 72, two valve ball adsorption assemblies 8, and one valve ball 200 to rotate counterclockwise together until the vertical adsorption transport unit 72, which has the valve ball 200 adsorbed inside, moves to the position directly above the valve seat placement groove 3-1 between the collection channel 6 and the detection placement seat 1-2. The valve seat placement groove 3-1 has an undetected valve seat 100. The vertical adsorption transport unit 72 above it drives the valve ball adsorption assembly 8 to move downwards, placing the valve ball 200 on the valve seat 100. The vertical adsorption transport unit 72 then drives the valve ball adsorption assembly 8 to move upwards, and then the transport drive mechanism 73 rotates. Mechanism 73 drives two drive transport mounting plates 71, two vertical adsorption transport units 72, and two valve ball adsorption assemblies 8 to rotate counterclockwise together, returning to their original positions (initial positions). At this time, the rotary drive mechanism 4 drives the transfer tray 3 to rotate counterclockwise until the empty valve seat placement slot 3-1 moves to the position corresponding to the conveying mechanism 5. At this time, the valve seat 100, which just had the valve ball 200 placed on it, will move with the valve seat placement slot 3-1 to the valve seat suction cup 72-1 closest to the conveying mechanism 5, directly below it, avoiding the gap 3-2 located directly above the detection placement seat 1-2. The conveying mechanism 5 then transports the processed valve seat 100 to the empty valve seat placement slot 3-1. The above steps are repeated to achieve continuous automatic feeding and unloading.

[0087] See Figure 4 In this embodiment, both counterclockwise and clockwise directions are shown in a top view, i.e. Figure 4 For reference only.

[0088] See Figures 1-13 The vertical drive mechanism 72-2 is a vertical drive cylinder or a vertical electric push rod mounted on the transport mounting plate 71. The telescopic part of the vertical drive cylinder or the vertical electric push rod is connected to the valve seat suction cup 72-1. The rotary transport drive mechanism 73 includes a rotary transport drive motor mounted on the frame 2. The rotary transport drive motor is located above the transfer tray 3.

[0089] See Figures 1-15An adaptive elastic component 9 is provided between the valve ball adsorption assembly 8 and the valve seat suction cup 72-1. The valve ball adsorption assembly 8 includes a valve ball suction cup 8-1 disposed inside the valve seat suction cup 72-1 and a negative pressure tube 8-2 connected to the valve ball suction cup 8-1. The valve seat suction cup 72-1 has a step 72-11 inside, which is an annular step. A guide hole is provided in the step 72-11 to guide the negative pressure tube 8-2 to move up and down. The adaptive elastic component 9 includes an upper limit plate 9-1 disposed at the upper end of the negative pressure tube 8-2, a lower limit plate 9-2 disposed at the lower end of the negative pressure tube 8-2, and an adaptive spring 9-3 sleeved on the negative pressure tube 8-2. One end of the adaptive spring 9-3 acts on the lower end of the step 72-11, and the other end acts on the lower limit plate 9-2. The upper limit plate 9-1 is located at the upper end of the step 72-11. In the above structure, the upper limit plate 9-1 and the step 72-11 can play a limiting role to prevent the valve ball adsorption assembly 8 from falling out of the valve seat suction cup 72-1; the valve ball adsorption assembly 8 can slide up and down along the axis of the valve seat suction cup 72-1. When the valve seat suction cup 72-1 adsorbs the valve seat 100, the elastic force of the adaptive spring 9-3 causes the valve ball suction cup 8-1 to press against the valve ball 200, so that the valve ball suction cup 8-1 can better adsorb the valve ball 200.

[0090] See Figures 13-14 The valve seat suction cup 72-1 has multiple suction holes distributed along the circumference. The upper ends of all suction holes are connected to the air chamber set in the step 72-11, and the air chamber is connected to negative pressure.

[0091] See Figures 1-7 and Figure 16 The conveying mechanism 5 includes a conveyor belt 5-1 and a push cylinder 5-2 disposed at the end of the conveyor belt 5-1 and perpendicular to the conveyor belt 5-1. The produced valve seat 100 is conveyed to its end via the conveyor belt 5-1. The rotary drive mechanism 4 drives the transfer tray 3 to rotate until the empty valve seat placement slot 3-1 moves to the position corresponding to the end of the conveyor belt 5-1. Then, the movement stops, and the push cylinder 5-2 pushes the valve seat 100 on the end of the conveyor belt 5-1 into the valve seat placement slot 3-1, completing the loading of the transfer tray 3.

[0092] See Figures 1-11 and Figure 17The transfer tray 3 is provided with positioning elements 10 for positioning the valve seat 100 in the valve seat placement slot 3-1. The number of positioning elements 10 is the same as the number of valve seat placement slots 3-1, and they are set one-to-one. The positioning elements 10 are slidably arranged on the transfer tray 3. A return spring 11 is provided between the transfer tray 3 and the positioning elements 10. The return spring 11 causes the positioning elements 10 to move upward and block and limit the valve seat 100 in the valve seat placement slot 3-1. The frame 2 is provided with a guide block 12 at a position corresponding to the end of the conveyor belt 5-1. The guide block 12 is used to guide the positioning elements 10 away from the valve seat placement slot 3-1. In the above structure, when the valve seat placement groove 3-1 moves to the position corresponding to the end of the conveyor belt 5-1, the guide block 12 will overcome the elastic force of the return spring 11 and guide the positioning member 10 away from the valve seat placement groove 3-1. At this time, the push cylinder 5-2 can smoothly push the valve seat 100 on the end of the conveyor belt 5-1 into the valve seat placement groove 3-1. When the transfer tray 3 rotates, the valve seat placement groove 3-1 leaves the position corresponding to the end of the conveyor belt 5-1, and the guide block 12 will separate from the positioning member 10. Under the elastic force of the return spring 11, the positioning member 10 resets and blocks and limits the valve seat 100 on the valve seat placement groove 3-1, preventing the valve seat 100 from leaving the valve seat placement groove 3-1 under the action of centrifugal force.

[0093] See Figures 1-11 and Figure 17 The positioning component 10 includes a mounting part 10-1, two positioning pins 10-2 disposed on the mounting part 10-1, two guide posts 10-3, and a pushing part 10-4. The two positioning pins 10-2 are disposed on the outer end of the mounting part 10-1, and the pushing part 10-4 is disposed on the inner end of the mounting part 10-1. The reset spring 11 is sleeved on the guide post 10-3. The guide post 10-3 is slidably connected to the transfer tray 3. The positioning pins 10-2 extend upward into the valve seat placement groove 3-1. The pushing part 10-4 is used to contact the guide block 12, and the guide block 12 is a conical guide block. In the above structure, the positioning pin 10-2 is located at the opening edge of the valve seat placement groove 3-1, mainly to prevent the valve seat 100 from detaching from the valve seat placement groove 3-1 under the action of centrifugal force. When the positioning member 10 rotates to the position corresponding to the end of the conveyor belt 5-1, the pushing part 10-4 will move downward with the guide block 12 and the conical guide block will guide the pushing part 10-4 to move downward, thereby driving the entire positioning member 10 to move downward and guiding the positioning pin 10-2 to leave the valve seat placement groove 3-1.

[0094] See Figures 1-11In this embodiment, there are three collection channels 6, which are installed on the frame 2. The distance between two adjacent collection channels 6 is the same as the distance between two adjacent clearance notches 3-2, and the distance between two adjacent clearance notches 3-2 is the same as the distance between two adjacent valve seat placement slots 3-1. When one of the clearance notches 3-2 is located directly above the detection placement seat 1-2, the distance between the detection placement seat 1-2 and the collection channel 6 closest to the detection placement seat 1-2 is the same as the distance between two adjacent clearance notches 3-2.

[0095] Example 2

[0096] The airtightness intelligent detection and sorting method in this embodiment differs from that in Embodiment 1, in that step (1) is:

[0097] After placing the valve ball 200 of the one-way valve on the valve seat 100, the valve seat 100 is placed together in the detection placement seat 1-2. That is, the valve ball 200 will be on the valve seat 100, and when the valve seat 100 is moved to the detection placement seat 1-2, the valve ball 200 moves together with the valve seat 100.

[0098] Example 3

[0099] The airtightness intelligent detection and sorting method in this embodiment differs from that in Embodiment 1, in that step (3) specifically includes the following steps:

[0100] (B3.1) Data Acquisition:

[0101] The pressure detection module monitors pressure changes in real time and establishes a time-dependent pressure change curve. When the pressure rises from the set value to the reference value, the time T taken for the pressure to rise from the set value to the reference value is obtained from the pressure change curve. For example, if the set value is -50 kPa and the reference value is -40 kPa, the time T is the time required for the pressure to rise from -50 kPa to -40 kPa. The longer the time T, the better the airtightness of the valve seat 100.

[0102] (B3.2) Set time grading thresholds; there are multiple time grading thresholds. The airtightness level is divided into four levels: excellent (A), good (B), medium (C), and poor (D). The time grading thresholds are divided into ΔT1, ΔT2, and ΔT3 from large to small.

[0103] (B3.3) Compare the time taken for the pressure to rise from the set value to the reference value with the time grading threshold. Based on the comparison result, determine the airtightness level and classify the valve seat. When T≥ΔT1, the airtightness level is excellent (A), and the valve seat is classified as excellent. When ΔT2≤T<ΔT1, the airtightness level is good (B), and the valve seat is classified as good. When ΔT3≤T<ΔT2, the airtightness level is medium (C), and the valve seat is classified as medium. When T<ΔT3, the airtightness level is poor (D), and the valve seat is classified as poor.

[0104] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A precision one-way valve seat airtightness intelligent detection and sorting device, characterized in that, The airtightness intelligent detection and sorting device is used to implement the airtightness intelligent detection and sorting method. The airtightness intelligent detection and sorting device includes a frame, an automatic loading and unloading sorting device mounted on the frame, and an airtightness detection mechanism; wherein... The airtightness of the valve seat of the one-way valve is tested using an airtightness testing mechanism, which includes a testing placement seat, a pressure detection module, and a negative pressure generating device connected in sequence via air pipes; the intelligent airtightness testing and sorting method includes: (1) Place the valve seat of the one-way valve in the test placement seat and place the valve ball of the one-way valve on the valve seat; (2) Start the negative pressure generating device to generate negative pressure inside the valve seat, and the valve ball is sucked tightly on the valve seat; when the pressure detected by the pressure detection module reaches the set value, maintain the pressure and release pressure naturally through the gap between the valve ball and the valve seat; (3) During the natural pressure relief process, the pressure detection module detects the pressure change in real time and obtains the pressure change curve. The pressure change curve is used to detect and determine the airtightness level of the valve seat, and the valve seat is classified according to the airtightness level. The automatic loading and unloading sorting device includes a transfer tray, a rotary drive mechanism for driving the transfer tray to rotate, a conveying mechanism for conveying valve seats onto the transfer tray, multiple collection channels below the transfer tray for collecting valve seats after testing, and a transport mechanism. The transport mechanism is used to transport valve seats from the transfer tray to the testing placement seat of the airtightness testing mechanism and to transport valve seats from the testing placement seat to the collection channels. The transport mechanism is equipped with a valve ball adsorption assembly for adsorbing valve balls, and the valve balls move with the transport mechanism. The detection placement seat is located below the transfer tray. The transfer tray has multiple valve seat placement slots for placing valve seats and multiple clearance notches for avoiding the handling mechanism. The multiple valve seat placement slots and multiple clearance notches are alternately arranged and evenly distributed along the circumference. The conveying mechanism includes a conveying mounting plate rotatably mounted on a frame, a vertical adsorption conveying unit mounted on the conveying mounting plate, and a rotary conveying drive mechanism for driving the conveying mounting plate to rotate; the vertical adsorption conveying unit includes a valve seat suction cup and a vertical drive mechanism mounted on the conveying mounting plate for driving the valve seat suction cup to move up and down; the valve ball adsorption assembly is located inside the valve seat suction cup. The number of vertical adsorption and transport units is two, and the number of valve ball adsorption assemblies is also two. The vertical adsorption and transport units and valve ball adsorption assemblies are arranged in a one-to-one correspondence. An adaptive elastic component is provided between the valve ball adsorption assembly and the valve seat suction cup. The valve ball adsorption assembly includes a valve ball suction cup disposed inside the valve seat suction cup and a negative pressure tube connected to the valve ball suction cup. A step is provided inside the valve seat suction cup. The adaptive elastic component includes an upper limit plate disposed at the upper end of the negative pressure tube, a lower limit plate disposed at the lower end of the negative pressure tube, and an adaptive spring sleeved on the negative pressure tube. One end of the adaptive spring acts on the lower end of the step, and the other end acts on the lower limit plate. The upper limit plate is located at the upper end of the step. The transfer tray is equipped with a positioning element for positioning the valve seat in the valve seat placement slot. The positioning element is slidably mounted on the transfer tray. A return spring is provided between the transfer tray and the positioning element. The return spring causes the positioning element to move upward to block and limit the valve seat in the valve seat placement slot. The frame is equipped with a guide block at a position corresponding to the end of the conveyor belt. The guide block is used to guide the positioning element away from the valve seat placement slot.

2. The airtightness intelligent detection and sorting device according to claim 1, characterized in that, Step (3) specifically includes the following steps: (A3.1) Data Acquisition: Record the pressure values ​​over a period of time, using a frequency of f, to obtain a set of time series pressure value data; (A3.2) Establish a pressure change curve using a set of time-series pressure data; (A3.3) Calculate the slope of the pressure change curve; (A3.4) Set the slope grading threshold; (A3.5) Compare the slope with the slope classification threshold, determine the airtightness level based on the comparison result, and classify the valve seat.

3. The airtightness intelligent detection and sorting device according to claim 1, characterized in that, Step (3) specifically includes the following steps: (B3.1) Data Acquisition: The pressure detection module detects pressure changes in real time and establishes a time-related pressure change curve. When the pressure rises from the set value to the reference value, the time taken for the pressure to rise from the set value to the reference value is obtained from the pressure change curve. (B3.2) Set time-level thresholds; (B3.3) Compare the time taken for the pressure to rise from the set value to the reference value with the time grading threshold. Based on the comparison result, determine the airtightness level and classify the valve seat.

4. The airtightness intelligent detection and sorting device according to claim 1, characterized in that, The pressure detection module includes a pressure gauge and a data processing unit. The negative pressure generating device includes a negative pressure tank, a negative pressure switch, and a negative pressure generator. The pressure gauge is connected to the data processing unit, and the air pipe sequentially connects the detection placement seat, the pressure gauge, the negative pressure tank, the negative pressure switch, and the negative pressure generator.

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