Desorption valve assembly process and detection system

Abstract

The invention relates to the technical field of desorption valve detection, in particular to a desorption valve assembly process and a detection system. Comprising the processing steps of bracket final assembly, coil detection, base part assembly, cover body press fitting, assembly part inner leakage detection, assembly part overall airtightness detection, assembly part comprehensive performance detection and assembly part turn-to-turn detection. On the second aspect, the desorption valve detection system is applied to the assembly process and comprises a cover body press-fitting machine, the cover body press-fitting machine comprises a stamping mechanism, a base and clamps, an assembly part is assembled in the middle of a support, a plurality of foot positions of the support penetrate through installation insertion holes close to the foot positions respectively, the two clamps abut against the top faces of the two sides of a support respectively, and the two clamps abut against the top faces of the two sides of the support respectively. The stamping mechanism stamps the foot position to form a V-shaped structure with an included angle of 50-80 degrees. The invention provides a desorption valve assembly process and a detection system. The overall comprehensive performance of a desorption valve can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of desorption valve detection, and in particular to a desorption valve assembly process and detection system. Background Art

[0002] The desorption valve of a motorcycle is an important component for controlling the desorption process of the carbon canister in the fuel evaporation control system. Specifically, as the temperature rises, the gasoline in the fuel tank is easy to volatilize, and the evaporated gasoline needs to be adsorbed and stored by the carbon canister to prevent the gasoline vapor from being emitted into the air and reduce environmental pollution. When the engine is working, that is, during the oil and gas desorption process, the desorption valve releases the adsorbed oil and gas to the engine intake system at a specific time to participate in combustion, thereby reducing air pollution caused by fuel evaporation emissions and increasing fuel efficiency at the same time.

[0003] During the assembly process of the existing degassing valve, the bracket, shaft, wire package, joint, spring, valve body, cover body, sealing ring and other parts are taken, and the component frames are pressed together by a frame pressing machine to obtain the degassing valve. After the assembly of the entire workpiece is completed, the air tightness of the workpiece is tested by negative pressure vacuum detection method or gas leak detection method.

[0004] However, when using the above-mentioned assembly process, the inventors found that there are the following technical defects: since the wire package needs to be connected to electricity while the workpiece is undergoing flow detection, the valve body will continue to jump. During the process of airtightness detection of the workpiece by negative pressure vacuum detection method or gas leak detection method, the first gas storage tank is required to be in a normally open state. As the valve body continues to jump, the entire detection airflow is in a fluctuating state, so that the air pressure cannot be kept stable during the detection process, so there will be errors in the detected data, resulting in a decrease in the overall performance of the product finally assembled. Summary of the invention

[0005] In order to overcome the technical problems existing in the above-mentioned background technology, the present application provides a desorption valve assembly process and a detection system, which can improve the assembly accuracy of the desorption valve and improve the overall comprehensive performance of the desorption valve.

[0006] In the first aspect, the present application provides a desorption valve assembly process, which adopts the following technical solution: A desorption valve assembly process includes the following processing steps: S1: Bracket assembly: inspect the appearance of the shaft and bracket, and remove defective products. The shaft is first assembled on the fixture of the bracket assembly machine. The shaft cavity of the bracket is directly opposite to the shaft, and they are assembled on the fixture at the same time. Pressure is applied to the bracket to trigger the ejector sensor. The shaft is fixed in the shaft cavity of the bracket by interference fit through the bracket assembly machine, and the height of the shaft protruding from the bracket shaft cavity is inspected; S2: Wire package inspection: inspect the appearance of the wire package and the joint, remove defective products, and inspect the performance of the wire package by connecting the electrical energy tester to the joint; S3: Assembly of base parts: The base parts include a first sealing ring, a second sealing ring, a spring, a valve body and a cover body. The second sealing ring is installed on the bottom sealing groove of the wire package, and the wire package and the second sealing ring are buckled in the frame. Then the spring and the valve body are installed in the installation cavity of the wire package in turn, and the first sealing ring is installed on the top sealing groove of the wire package. Finally, the cover body is installed on the top of the wire package. S4: Cover body press-fitting: The cover body is fixed to the outside of the bracket by a cover body press-fitting machine to obtain an assembly; S5: Internal leakage detection of assembly parts: Use airtightness detector and internal leakage tooling to detect internal leakage of assembly parts; S6: Overall air tightness test of the assembly: Use an air tightness tester in conjunction with air tightness tooling to conduct an overall air tightness test on the assembly; S7: Comprehensive performance test of assembly parts: Comprehensive performance test of assembly parts is carried out through the carbon canister desorption valve test system; S8: Turn-to-turn detection of assembly parts: Perform turn-to-turn detection on the assembly parts using a turn-to-turn tester.

[0007] By adopting the above technical scheme, the bracket assembly machine is used to realize the precise alignment and fixation of the shaft body and the bracket shaft cavity, and the interference fit between the shaft and the bracket shaft cavity ensures the accuracy and stability of the assembly, and by detecting the height of the shaft body protruding from the bracket shaft cavity, it is ensured that the dimensional accuracy meets the design requirements, providing guarantee for the subsequent sealing and functionality; by detecting the appearance of the wire package and the joint part, the existing defective products are further eliminated, and the electric energy tester is used to detect to ensure that the assembly meets the predetermined working requirements. Compared with the prior art, the present application improves the matching accuracy of the shaft body and the bracket during assembly by detecting the height of the shaft body protruding from the bracket shaft cavity, ensures that it can be installed in place, and reduces the shaking caused by external force factors. In addition to observing the wire package at the appearance level, the present application also uses an electric energy tester to test the electrical performance of the wire package before assembling the wire package on the bracket, so that it can more intuitively judge whether the wire package has defects in the electrical energy dimension, and ensure that the wire packages connected to the bracket are all good, so as to avoid damage to the entire desorption valve.

[0008] With the help of a cover pressing machine, the wire package is firmly fixed to the outside of the bracket, which enhances the stability of the overall structure. In the present application, the installation of the first sealing ring and the second sealing ring effectively improves the sealing performance of the outer edges of the top and bottom ends of the wire package to prevent gas or liquid leakage. The spring, valve body and cover are installed in sequence to ensure that the basic functions of the desorption valve are realized and form a compact and integrated assembly. Through specific performance tests, it is possible to perform air tightness tests on the desorption valve under dynamic conditions, determine the power-on voltage of the wire package, and test whether the internal flow through the desorption valve meets the standards, and comprehensively evaluate the performance of the assembly, thereby achieving the purpose of improving the overall comprehensive performance of the desorption valve and ensuring the performance of the desorption valve.

[0009] Preferably, the cover body includes a support, a plurality of pins are arranged at the top of the support, and installation holes are respectively opened at the corners of the support. In the S4 step, the plurality of pins are correspondingly installed in the installation holes, and the pins are punched into a V-shaped structure by a cover body pressing machine.

[0010] By adopting the above technical solution, the multiple pins on the top of the bracket are installed correspondingly in the mounting sockets at the corners of the support, and a V-shaped structure is formed by punching through a cover press, thereby increasing the strength of the connection point and enhancing the connection stability between the cover and the bracket, making the positioning more accurate during assembly and reducing the possibility of the support detaching from the bracket, which helps to improve the tightness of the connection between the bracket and the wire package, thereby improving the air tightness of the desorption valve.

[0011] Preferably, the cover body includes an air inlet pipe and an air outlet pipe arranged transversely, and the step S5 includes the following processing steps: S5.1: The negative pressure source is connected to the airtight detector, and is connected to the air outlet pipe of the cover body through the airtight detector for air suction. The air inlet pipe of the cover body is connected to atmospheric pressure. The assembly is tested for internal leakage through the airtight detector in conjunction with the internal leakage tooling.

[0012] Preferably, the step S7 includes the following processing steps: S7.1: The negative pressure source is connected to the first gas tank, which is connected to the second gas tank. The second gas tank is used to stabilize the duty cycle flow fluctuation during the assembly inspection process. The first gas tank is used to stabilize the pressure, and the first gas tank is connected to the negative pressure source to generate negative pressure. A precision flow meter is connected between the first gas tank and the second gas tank. The negative pressure end of the second gas tank is connected to the comprehensive performance tester, and the comprehensive performance tester is connected to the air outlet pipe of the cover body. The air inlet pipe of the cover body is connected to the atmospheric pressure. At the same time, the docking head is connected to a power supply, and the comprehensive performance of the assembly is tested through the carbon canister desorption valve test system.

[0013] By adopting the above technical scheme, during the operation of the negative pressure source, the extracted airflow fluctuates due to load changes. The present application absorbs the fluctuations through the first air tank, stabilizes the pressure, and reduces the instantaneous changes in air pressure, thereby providing a more stable air pressure; and the second air tank can reduce frequent starts and stops, thereby extending the service life of the first air tank; and the second air tank can protect the desorption valve and reduce damage caused by excessive air pressure fluctuations. The stable air pressure can reduce the wear on the first air tank and the desorption valve, thereby extending the maintenance cycle and service life of the equipment; and the second air tank can reduce the noise caused by air pressure fluctuations during the operation of the first air tank; and by reducing the frequent starts and stops of the first air tank, the energy efficiency of the entire system is improved and energy consumption is reduced.

[0014] The cooperation between the first gas tank and the second gas tank provides a stable and adjustable negative pressure source for the comprehensive performance test, ensuring the accuracy and reliability of the test, so that the comprehensive performance test process can effectively screen out products with leaks, thereby improving the quality level of products leaving the factory.

[0015] The carbon canister desorption valve test system is realized by synchronously collecting the flow simulation signal of the carbon canister shut-off valve through the intake pipe, and then calculating the carbon canister desorption flow rate to achieve comprehensive performance testing of the assembly. It can comprehensively evaluate the comprehensive performance of the product to ensure that it meets the design requirements.

[0016] Preferably, the step S8 includes the following processing steps: S8.1: Connect the plug of the turn-to-turn tester to the connector, without ventilation of the assembly, and perform turn-to-turn testing on the assembly using the turn-to-turn tester.

[0017] By adopting the above technical solution, the turn-to-turn tester performs turn-to-turn detection on the assembly, which can ensure that the product has a good working voltage during use and improve the stability of use.

[0018] Preferably, the step S3 includes the following processing steps: S3.1: Clamp the first sealing ring into the sealing groove at the top of the line package, and install the second sealing ring into the sealing groove at the bottom of the line package. Install the spring and the valve body from top to bottom in the installation cavity of the line package. At the same time, insert the shaft body into the installation cavity from bottom to top, so that the spring is arranged between the outer wall of the shaft body and the inner wall of the valve body. S3.2: Take the sealing pressure head, and clamp the sealing pressure head with the valve body. The bottom end of the spring abuts against the top surface of the fixed iron core in the installation cavity, and the top end abuts against the top wall of the valve body; S3.3: The cover body includes an extension tube and a connecting tube arranged vertically, wherein the connecting tube is fixed at the middle part of the extension tube, a gap is left between the tube walls of the two, and the side wall of the connecting tube is connected with the air inlet pipe, and the bottom end of the connecting tube is connected with the air outlet pipe. The connecting tube is inserted into the installation cavity from top to bottom, and a sealing groove is provided on the top surface of the sealing pressure head until the bottom end tube wall of the connecting tube is adapted to be plugged into the sealing groove.

[0019] By adopting the above technical scheme, a stable system is formed under the cooperation of the spring, valve body, shaft body, sealing pressure head and cover body. The first sealing ring is clamped in the sealing groove at the top of the line package, and the connecting tube is adapted to the sealing groove on the top surface of the sealing pressure head. This specific assembly method ensures the sealing performance between the connecting tube and the installation cavity. The sealing ring and the sealing pressure head can provide good sealing. When in the closed state, the flow input from the air inlet pipe of the cover body cannot be transmitted to the air outlet pipe, effectively preventing gas leakage. In the present application, the spring and the valve body can move flexibly in the installation cavity of the line package, ensuring that the desorption valve can be opened and closed smoothly during operation, and the flow input from the air inlet pipe of the cover body can be transmitted to the air outlet pipe to achieve a passage state.

[0020] In the second aspect, the present application provides a desorption valve detection system, which is applied in the assembly process and adopts the following technical solution: A desorption valve detection system, a cover body press machine includes a stamping mechanism, a base, and a clamp, two of the clamps are arranged on both sides of the base, a bracket is installed on the base, a wire package is assembled in the middle of the bracket, a plurality of the feet of the bracket respectively pass through the mounting sockets close to it, the two clamps are respectively pressed against the top surfaces on both sides of the support, and the stamping mechanism stamps the feet into a V-shaped structure with an angle of 50°-80°.

[0021] By adopting the above technical scheme, the synergistic effect of the stamping mechanism, the base and the clamp can achieve rapid and accurate assembly of the wire package and the bracket. The clamp can stably clamp the workpiece, thereby improving the stability of the foot when being stamped, so that the foot forms a V-shaped structure with an angle of 50°-80°, thereby achieving the purpose of enhancing the connection strength and stability between the bracket and the wire package, so that the assembled desorption valve can withstand a larger workload, extend its service life, and at the same time improve the sealing performance of the desorption valve.

[0022] Preferably, the clamp includes a driving member, a first connecting rod, a second connecting rod, a first rocker arm and a second rocker arm, wherein the first connecting rod and the second connecting rod are fixed in parallel on the top surface of the base, the first connecting rod and the first rocker arm are assembled via an axial connection, the second connecting rod and the second rocker arm are assembled via an axial connection, the first rocker arm and the second rocker arm are assembled via an axial connection, an end of the first rocker arm away from the first connecting rod points to the bracket, and the output end of the driving member is assembled with the bottom end of the first connecting rod.

[0023] By adopting the above technical solution, under the cooperation of the driving member, the first connecting rod, the second connecting rod, the first rocker arm and the second rocker arm, the clamp can realize the function of stably clamping the workpiece, ensuring the precise clamping and positioning of the bracket and the wire package, thereby improving the stability of the foot when being stamped. At the same time, the clamp can also adapt to workpieces of different sizes and shapes, improving the applicable range of the angle.

[0024] Preferably, the stamping mechanism includes a stamping head, a power assembly and a forming piece, the output end of the power assembly is assembled with the top end of the stamping head, the stamping head is used to stamp multiple pins at the same time, the forming piece is movably installed in the stamping head, and the forming piece is used to shape the V-shaped angle of the pins.

[0025] By adopting the above technical solution, under the coordinated action of the punch head and the power assembly, multiple pins can be punched simultaneously, which significantly improves the punching efficiency. The forming part is movably installed in the punch head, which can further accurately shape the V-shaped angle of the pin, ensuring the consistency and quality of the product.

[0026] Preferably, the carbon canister desorption valve testing system includes a clamping member, a first vent joint part, and a second vent joint part, wherein the clamping member is used to fix the bracket, the first vent joint part is assembled with the air outlet pipe of the cover body, the second vent joint part is assembled with the air inlet pipe of the cover body, and the negative pressure end of the negative pressure source is assembled with the first vent joint part.

[0027] By adopting the above technical solution, the design of the clamp makes the fixation of the bracket simple and quick, ensuring the stability of the bracket during the detection process and improving the accuracy of the detection; the precise assembly of the first ventilation joint part and the air outlet pipe of the cover body, and the second ventilation joint part and the air inlet pipe of the cover body realizes efficient ventilation connection, providing reliable support for comprehensive performance testing.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. Compared with the prior art, the present application improves the matching accuracy of the shaft body and the bracket during assembly by detecting the height of the shaft body protruding from the bracket shaft cavity, ensuring that it can be installed in place and reducing the shaking caused by external force factors. In addition to observing the condition of the wire package at the appearance level, the present application also uses an electric energy tester to test the electric energy of the wire package before assembling the wire package on the bracket, which can more intuitively determine whether the wire package has defects in the electric energy dimension, ensuring that the wire packages connected to the bracket are all good, avoiding damage to the entire desorption valve; 2. Through specific desorption valve detection, it is possible to detect the air tightness of the desorption valve in dynamic conditions, determine the power-on voltage of the wire package, and test whether the internal flow through the desorption valve meets the standard, and comprehensively evaluate the performance of the assembly, thereby achieving the purpose of improving the comprehensive performance detection accuracy of the desorption valve and ensuring the performance of the desorption valve; 3. During the operation of the first gas tank, the output air pressure fluctuates due to load changes. The present application absorbs the fluctuations through the second gas tank, reduces the instantaneous changes in air pressure, thereby providing a more stable air pressure and ensuring the accuracy and reliability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the assembly parts in the embodiment of the present application.

[0030] Figure 2 yes Figure 1 sectional view of .

[0031] Figure 3 It is a schematic diagram of the structure of the bracket assembly in the embodiment of the present application.

[0032] Figure 4 It is a structural schematic diagram of the cover body press assembly machine in the embodiment of the present application.

[0033] Figure 5 It is a structural schematic diagram of the first stamping mechanism in the embodiment of the present application.

[0034] Figure 6 It is a structural schematic diagram of the second stamping mechanism in the embodiment of the present application.

[0035] Figure 7 It is a schematic diagram of internal leakage detection in an embodiment of the present application.

[0036] Figure 8 It is a schematic diagram of the overall airtightness detection in the embodiment of the present application.

[0037] Fig. 9 It is a structural schematic diagram of the comprehensive performance tester in the embodiment of the present application.

[0038] Description of reference numerals: 1, assembly; 10, bracket; 101, foot position; 11, shaft body; 12, wire package; 13, joint part; 141, first sealing ring; 142, sealing pressure head; 1421, sealing groove; 143, second sealing ring; 15, spring; 16, valve body; 17, cover body; 171, air inlet pipe; 172, air outlet pipe; 173, extension pipe; 174, connecting pipe; 175, support; 18, fixed iron core; 19, electromagnetic coil; 2. Bracket assembly machine; 21. First frame press-fit bracket; 211. First positioning column; 212. First buffer spring; 22. First tooling position; 23. First upper die punch; 24. Fixture; 241. Left clamp; 242. Right clamp; 3. Cover body press-fitting machine; 311. Punch head; 3111. Punch head; 3112. Fixing seat; 312. Power assembly; 313. Forming member; 3131. Slider; 3132. Soft airbag; 3133. Inflatable member; 32. Base; 33. Clamp; 331. Driving member; 332. First connecting rod; 333. Second connecting rod; 334. First swing rod; 3341. Pressing part; 335. Second swing rod; 4. Air tightness detector; 5. Carbon canister desorption valve test system; 51. Clamping piece; 52. First ventilation joint; 53. Second ventilation joint; 551. First gas storage tank; 552. Second gas storage tank. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-9 This application is described in further detail.

[0040] In a first aspect, an embodiment of the present application discloses a desorption valve detection system.

[0041] Reference Figure 1-9 A desorption valve detection system includes a bracket assembly machine 2, a cover body press machine 3, an electric energy tester, an airtightness tester 4, a carbon canister desorption valve test system 5 and an inter-turn tester, wherein the bracket assembly machine 2 is used to assemble the shaft body 11 on the bracket 10; the cover body press machine 3 is used to fix the wire package 12 on the outside of the bracket 10 to obtain an assembly 1; the electric energy tester is used to detect the electrical properties of the wire package 12; the airtightness tester 4 is used to detect the airtightness of the assembly 1; the carbon canister desorption valve test system 5 is used to perform comprehensive performance testing on the assembly 1; the inter-turn tester is used to perform inter-turn testing on the assembly 1.

[0042] In the prior art, relying solely on manual inspection or equipment visual recognition cannot ensure that each wire package 12 is intact before assembly. If the outer wall of the wire package 12 is lacking glue and the copper wire is exposed, during the comprehensive performance test, the product will short-circuit during the power-on process, thereby causing damage to the entire workpiece.

[0043] The present application achieves precise installation of the desorption valve through the cooperation between different frame presses, detects the appearance of the wire package 12 and the joint part 13, eliminates defective products, and detects its performance with an electric energy tester to further ensure that the assembly 1 meets the predetermined working requirements. It can more intuitively determine whether the wire package 12 has defects in the electrical performance dimension, and ensure that the wire package 12 connected to the bracket 10 is in good condition to avoid damage to the entire desorption valve.

[0044] Through specific desorption valve detection, it is possible to perform air tightness detection on the desorption valve in dynamic conditions, determine the power-on voltage of the wire package 12, and test whether the internal flow through the desorption valve meets the standard, so as to comprehensively evaluate the comprehensive performance of the assembly 1, thereby achieving the purpose of improving the comprehensive performance detection accuracy of the desorption valve and ensuring the performance of the desorption valve.

[0045] Specifically, refer to Figure 2 and Figure 3 The bracket assembly machine 2 includes a first frame press-fitting bracket 21, a first workpiece position 22, a first upper die punch 23 and a fixture 24, wherein the first workpiece position 22 is fixed in the middle of the first frame press-fitting bracket 21, and the first upper die punch 23 is movably assembled on the top of the first frame press-fitting bracket 21, so that the first upper die punch 23 is vertically opposite to the first workpiece position 22. In the present application, a hydraulic cylinder or a pneumatic cylinder is used as a power source to drive the first upper die punch 23 to move in the vertical direction. The first frame press-fitting bracket 21 includes a first positioning column 211 and a first buffer spring 212. The first buffer spring 212 is sleeved on the outside of the first positioning column 211. When the power source drives the first upper die punch 23 to move in the vertical direction, the first positioning column 211 provides guidance and the first buffer spring 212 provides buffering and shock absorption.

[0046] The fixture 24 includes a left gripper 241 and a right gripper 242, which are arranged opposite to each other on both sides of the outside of the first workstation 22, and are driven by a hydraulic cylinder or an air cylinder as a power source to move horizontally. The first workstation 22 includes a fixing hole adapted to the small end of the shaft body 11 and a clamping seat adapted to the top of the bracket 10. When used, first check whether the appearance of the shaft body 11 and the bracket 10 is defective, take a shaft body 11 with good appearance, insert its small end into the fixing hole, and then take a bracket 10 with good appearance, assemble its top on the clamping seat, and trigger the ejector pin induction to drive the first upper die punch 23 to move downward, so that the shaft body 11 can be fixed in the axial cavity of the bracket 10, thereby realizing the assembly of the two.

[0047] In the present application, the bracket assembly machine 2 also includes an infrared sensor and a data system (not shown in the figure). The infrared sensor is electrically connected to the data system. The infrared sensor is fixed on the first frame press-fit bracket 21. The infrared sensor is used to detect the state of the shaft body 11 installed on the bracket 10 and the height of the shaft protruding out of the axial cavity of the bracket 10, and feed back the signal to the data system for display on the data system.

[0048] Reference Figure 4 and Figure 5The cover body press assembling machine 3 includes a stamping mechanism, a base 32, and a clamp 33. The base 32 includes two limit seats that are distributed opposite to each other. A space for installing the bracket 10 is reserved between the two limit seats. The wire package 12 and the bracket 10 that are movably assembled together are placed in the space, that is, the bracket 10 is installed on the base 32, the wire package 12 is assembled in the middle of the bracket 10, and the multiple pins 101 of the bracket 10 respectively pass through the installation sockets close to it.

[0049] Two clamps 33 are arranged on both sides of the base 32 , and the two clamps 33 are pressed against the top surfaces of both sides of the support 175 respectively. The stamping mechanism stamps the foot position 101 into a V-shaped structure with an angle of 50°-80°.

[0050] Specifically, the clamp 33 includes a driving member 331, a first connecting rod 332, a second connecting rod 333, a first rocker arm 334 and a second rocker arm 335, wherein the driving member 331 is a driving cylinder, the first connecting rod 332 and the second connecting rod 333 are fixed in parallel on the top surface of the base 32, the first connecting rod 332 and the first rocker arm 334 are assembled via an axial connection, the second connecting rod 333 and the second rocker arm 335 are assembled via an axial connection, the first rocker arm 334 and the second rocker arm 335 are assembled via an axial connection, one end of the first rocker arm 334 away from the first connecting rod 332 points to the bracket 10, and a clamping portion 3341 is provided at one end of the first rocker arm 334 away from the first connecting rod 332, the bottom surface of the clamping portion 3341 is flattened, and the output end of the driving member 331 is assembled with the bottom end of the first connecting rod 332.

[0051] When in use, the wire package 12 is installed on the base 32, and the driving member 331 is started. The first connecting rod 332 can move vertically downward, and then drive the first swing rod 334 and the second swing rod 335 to swing until the pressing portion 3341 of the first swing rod 334 presses against the support 175 of the cover body 17. Under the cooperation of the two sets of clamps 33, the cover body 17 is ensured to be tightly pressed on the top surface of the bracket 10, and the cover body 17 shall not be pressed out of marks or damaged, thereby improving the installation stability of the entire workpiece and the base 32, and ensuring the accurate clamping and positioning of the workpiece. In this application, the clamp 33 is a highly flexible connecting rod structure that can adapt to workpieces of different sizes and shapes, improves the applicable range of the angle, and ensures the stability of subsequent processing of the workpiece.

[0052] In order to achieve the effect of punching the foot 101 to have a V-shaped angle, the present application provides two preferred punching mechanisms. The first one is to refer to Figure 4 and Figure 5The punching mechanism includes a punching head 311 and a power assembly 312, wherein the specific structure of the power assembly 312 is not specifically limited. The power assembly 312 can also use a hydraulic cylinder or a cylinder as a power source, as long as it can drive the punching head 311 to move in the vertical direction. The punching head 311 includes punches 3111 that are consistent with the number of pins 101 and a fixed seat 3112. The multiple punches 3111 are evenly distributed at the bottom of the fixed seat 3112. The punches 3111 are V-shaped, and the contact surface between the punches 3111 and the pins 101 is smooth to avoid scratching the electroplating layer of the pins 101.

[0053] The second one, refer to Figure 4 and Figure 6 On the basis of the first structure, the stamping mechanism also includes a forming part 313, and each punch 3111 is provided with a forming part 313, specifically, the forming part 313 includes a through hole vertically opened at the bottom of the punch 3111, a slider 3131 slidably connected inside the through hole, a soft air bag 3132 fixed at the bottom of the slider 3131, a lifting cylinder fixed at the fixed seat 3112, and an inflatable part 3133 fixed at the fixed seat 3112, wherein the output end of the lifting cylinder is assembled with the top surface of the slider 3131, and the inflatable part 3133 has an inflatable tube that can be freely retracted and retracted, and the inflatable tube is connected with the inflatable port of the soft air bag 3132.

[0054] Under the action of the power component 312, the punch head 311 moves downward, that is, it drives the multiple punches 3111 distributed at the bottom of the fixed seat 3112 to punch the foot positions 101 opposite to it respectively. After completing the punching action, the lifting cylinder is started to drive the slider 3131 to slide downward, and the inflatable part 3133 inflates the soft air bag 3132 synchronously. The soft air bag 3132 can slide freely along the through hole. After the soft air bag 3132 is inflated, part of the soft air bag 3132 extends out of the through hole until the soft air bag 3132 can be pressed against the inner wall of the foot position 101.

[0055] Since the pin 101 in the present application is made of metal material, after being stamped by the stamping mechanism, the pin 101 is constrained by its own material and has a certain resilience, which leads to a certain error in the angle formed at the pin 101 and low precision. The present application uses the shaping piece 313 in the second stamping mechanism to pressurize and shape the V-shaped angle, which can overcome the resilience of the metal, so that the angle can be stamped into place and ensure accuracy.

[0056] With the synergistic effect of the stamping mechanism, the base 32 and the clamp 33, the wire package 12 and the bracket 10 are assembled quickly and accurately. The clamp 33 can stably clamp the workpiece, thereby improving the stability of the foot 101 when being stamped, so that the foot 101 forms a V-shaped structure with an angle of 50°-80°, and the preferred range value is 60°-75°, so as to achieve the purpose of enhancing the connection strength and stability between the bracket 10 and the wire package 12, so that the assembled desorption valve can withstand a larger workload, extend the service life, and at the same time improve the sealing performance of the desorption valve.

[0057] Reference Figure 7 The carbon canister desorption valve testing system 5 includes a clamping member 51, a first ventilation joint portion 52, a second ventilation joint portion 53 and a negative pressure source (not shown in the figure), wherein the clamping member 51 is used to fix the bracket 10, the first ventilation joint portion 52 is assembled with the outlet pipe 172 of the cover body 17, the second ventilation joint portion 53 is assembled with the inlet pipe 171 of the cover body 17, and the negative pressure end of the negative pressure source is assembled with the first ventilation joint portion 52.

[0058] Specifically, the structure of the clamp 51 is consistent with that of the fixture 24, and no repetitive description is given here. Both are driven by a hydraulic cylinder or a gas cylinder as a power source to move in the horizontal direction, and are used to reinforce the position of the bracket 10. The carbon canister desorption valve test system 5 also includes a first gas tank 441, a second gas tank 442, and a comprehensive performance tester, wherein the second gas tank 442 can be replaced by a pressure regulating valve, a gas regulator, and a safety valve. The first gas tank 441 and the second gas tank 442 are connected by a pipeline, and the second gas tank 442 and the first ventilation joint part 42 are also connected by a pipeline. The comprehensive performance tester is connected between the air inlet pipe 171 of the cover body 17 and the second ventilation joint part 53, and is used to check and read the comprehensive performance data.

[0059] In the present application, the carbon canister purge valve test system 5 is used in conjunction with a comprehensive performance tester. The carbon canister purge valve test system 5 includes a power supply for providing electrical energy to the joint part 13 and a flow test system for displaying flow data of the flow inside the assembly 1 .

[0060] During the flow detection process, power is supplied between the power supply and the joint part 13, and the assembly 1 is in an open state. The gas can enter the extension tube 173 along the inlet pipe 171, and then flow out to the outlet pipe 172 from the gap between the connecting pipe 174 and the sealing groove 1421. The data on the flow test system is observed to determine the flow condition of the desorption valve under a dynamic environment.

[0061] In the present application, the electric energy tester and the turn-to-turn tester may be any instrument in the prior art as long as they can achieve the corresponding effect.

[0062] Reference Figure 8During the internal leakage detection process, the assembly 1 is in a closed state, the assembly 1 is fixed by an internal leakage tool (not shown in the figure), and the negative pressure source is connected to the air outlet pipe 172 of the cover body 17, and the airtightness detector 4 is connected between the negative pressure source and the air outlet pipe 172 of the cover body 17.

[0063] Start the negative pressure source, connect it with the air outlet pipe 172 of the cover body 17 through the airtightness detector 4, observe the data on the airtightness detector 4, and judge whether the assembly 1 has leakage in a static environment.

[0064] Reference Fig. 9 During the overall airtightness test, the assembly 1 is in a closed state, the assembly 1 is fixed by an airtight tooling, and the negative pressure source is connected to the air inlet pipe 171 and the air outlet pipe 172 of the cover body 17 at the same time, the airtightness detector 4 is connected between the negative pressure source and the air outlet pipe 172 of the cover body 17 and between the negative pressure source and the air outlet pipe 172 of the cover body 17, the negative pressure source is started, and the airtightness detector 4 is connected to the air inlet pipe 171 and the air outlet pipe 172 of the cover body 17 respectively, and air is inhaled respectively, and the data on the airtightness detector 4 is observed to determine whether the assembly has leakage in a static environment.

[0065] In a second aspect, the present application provides a desorption valve assembly process, which uses a desorption valve detection system to assemble the desorption valve.

[0066] A desorption valve assembly process includes the following processing steps: Reference Figure 3 S1: Assembly of bracket 10: Check the appearance of shaft 11 and bracket 10, and remove defective products. Shaft 11 is first assembled on the tooling of bracket assembly machine 2. The shaft cavity of bracket 10 is directly opposite to shaft 11, and they are assembled on the tooling at the same time. Pressurize bracket 10 to trigger ejector induction. Shaft 11 is fixed in the shaft cavity of bracket 10 by interference fit through bracket assembly machine 2. The height of shaft 11 protruding from the shaft cavity of bracket 10 is detected. The interference fit between shaft 11 and the shaft cavity of bracket shaft 10 can reflect whether the interference fit of the product can meet the use in the press-fitting process, and remove the products with loose fit to prevent shaft 11 from falling off from bracket 10 during use.

[0067] In the prior art, when the shaft 11 and the bracket 10 are assembled together, it is impossible to determine whether the shaft 11 is installed in place, which causes the product to shake during the airtightness test, thereby resulting in low airtightness accuracy of the workpiece.

[0068] Therefore, in this application, the appearance of the shaft body 11 and the bracket 10 is first inspected for any defects, including: the shaft is bent, cracked, deformed, and other abnormalities; the bracket 10 is deformed, the shaft cavity is too large, and other abnormalities. Take a shaft body 11 with good appearance, insert its small end into the fixing hole, then take a bracket 10 with good appearance, assemble its top on the card seat, and trigger the ejector sensor to drive the first upper die punch 23 to move downward, so that the shaft body 11 can be fixed in the shaft cavity of the bracket 10 by interference fit, thereby achieving the assembly of the two.

[0069] In the present application, the infrared sensor of the bracket assembly machine 2 is started to electrically connect the infrared sensor to the data system. The infrared sensor detects the state of the shaft 11 installed on the bracket 10 and the height of the shaft protruding out of the axial cavity of the bracket 10, and feeds back the signal to the data system for display on the data system.

[0070] More specifically, at least three test points are set, and the three test points are connected into a line segment, which is compared with the standard set by the data system to determine whether the shaft body 11 after stamping is deformed and bent, and at the same time, the height of the shaft protruding outside the shaft cavity of the bracket 10 is calculated to determine whether the height meets the standard. The operator checks and gently shakes the bracket 10 to see if the shaft body 11 is installed upside down, loose, or cracked. Unqualified products after stamping cannot be repaired and are directly treated as scrap.

[0071] Reference Figure 1 and Figure 2 , S2: Wire package 12 inspection: inspect the appearance of the wire package 12 and the joint part 13, remove defective products, assemble the two together, and inspect the electrical performance of the wire package 12 through an electric energy tester.

[0072] S3: Assembly of base parts: The base parts include a first sealing ring 141, a second sealing ring 143, a spring 15, a valve body 16 and a cover body 17. The second sealing ring 143 is installed on the bottom sealing groove of the wire package 12, and the wire package 12 and the second sealing ring 143 are buckled in the frame. The spring 15 and the valve body 16 are installed in the installation cavity of the wire package 12 in turn, and the first sealing ring 141 is installed on the top sealing groove of the wire package 12. Finally, the cover body 17 is installed on the top of the wire package 12.

[0073] Specifically, first, the second sealing ring 143 is clamped in the sealing groove groove at the bottom end of the wire package 12, and the wire package 12 and the second sealing ring 143 are buckled in the frame, and the spring 15 and the valve body 16 are movably installed from top to bottom in the top installation cavity of the wire package 12, and the valve body 16 is the moving iron core. At the same time, the shaft body 11 is inserted into the installation cavity from bottom to top, so that the spring 15 is arranged between the outer wall of the shaft body 11 and the inner wall of the valve body 16, and the side of the wire package 12 close to the installation cavity is the electromagnetic coil 19.

[0074] Then take the sealing pressure head 142, which is clamped with the valve body 16, the bottom end of the spring 15 abuts against the top surface of the fixed iron core 18 in the installation cavity, and the top end abuts against the top wall of the valve body 16, and finally install the first sealing ring 141.

[0075] The cover body 17 includes a vertically arranged extension tube 173 and a connecting tube 174, wherein the connecting tube 174 is fixed at the middle part of the extension tube 173, a gap is left between the tube walls of the two, and the side wall of the connecting tube 174 is connected with the air inlet pipe 171, and the bottom end of the connecting tube 174 is connected with the air outlet pipe 172, the connecting tube 174 is inserted into the installation cavity from top to bottom, and a sealing groove 1421 is provided on the top surface of the sealing pressure head 142 until the bottom end tube wall of the connecting tube 174 is adapted to be plugged into the sealing groove 1421.

[0076] With the cooperation of the spring 15, valve body 16, shaft body 11, sealing pressure head 142 and cover body 17, a stable system is formed. The first sealing ring 141 is snapped into the sealing groove groove at the top of the line package 12, and the connecting tube 174 is adapted to be plugged into the sealing groove 1421 on the top surface of the sealing pressure head 142. This specific assembly method ensures the sealing performance between the connecting tube 174 and the installation cavity. The first sealing ring 141, the second sealing ring 143 and the sealing pressure head 142 can provide good sealing. When in the closed state, the flow input from the air inlet pipe 171 of the cover body 17 cannot be transmitted to the air outlet pipe 172, effectively preventing gas leakage; in the present application, the spring 15 and the valve body 16 can move flexibly in the installation cavity of the line package 12, ensuring that the desorption valve can be opened and closed smoothly during operation, and the flow input from the air inlet pipe 171 of the cover body 17 can be transmitted to the air outlet pipe 172, realizing the passage state.

[0077] Reference Figure 4-6 S4: Pressing the cover 17: The cover 17 is fixed to the outside of the bracket 10 by the cover pressing machine 3 to obtain the assembly 1.

[0078] The cover body 17 includes a support 175, and a plurality of pins 101 are arranged at the top of the bracket 10. The corners of the support 175 are respectively provided with mounting holes. In step S4, the plurality of pins 101 are correspondingly installed in the mounting holes, and the pins 101 are punched into a V-shaped structure by the cover body pressing machine 3.

[0079] The multiple pins 101 at the top of the bracket 10 are correspondingly installed in the mounting sockets at the corners of the support 175, and a V-shaped structure is formed by punching through the cover body press machine 3, which increases the strength of the connection point and enhances the connection stability between the cover body 17 and the bracket 10, making the positioning more accurate during the assembly process and reducing the possibility of the support 175 detaching from the bracket 10, which helps to improve the connection tightness between the bracket 10 and the wire package 12, thereby improving the air tightness of the desorption valve.

[0080] Reference Figure 7 , S5: Internal leakage detection of assembly 1: internal leakage detection of assembly 1 is performed by using airtight detector 4 in conjunction with internal leakage tooling.

[0081] Specifically, during the detection process, the air outlet pipe 172 and the air inlet pipe 171 of the cover body 17 are connected to the airtightness detector 4. Under the action of the negative pressure source, the airtightness detector 4 inhales the air outlet pipe 172 of the cover body 17, and the air inlet pipe 171 of the cover body 17 is connected to the atmospheric pressure, and detects whether there is internal leakage in the assembly 1.

[0082] Reference Figure 8 S6: Overall air tightness test of the assembly 1: Perform an overall air tightness test on the assembly 1 using an air tightness tester 4 in conjunction with an air tightness tool.

[0083] Specifically, during the detection process, the air outlet pipe 172 and the air inlet pipe 171 of the cover body 17 are connected to the airtightness detector 4. Under the action of the negative pressure source, the airtightness detector 4 inhales the air inlet pipe 171 and the air outlet pipe 172 of the cover body 17 and detects the overall airtightness of the assembly 1.

[0084] Reference Figure 1 , 2 , 9, S7: Comprehensive performance test of assembly 1: Perform comprehensive performance test on assembly 1 through carbon canister desorption valve test system 5.

[0085] The negative pressure source is connected to the first gas tank 551, and the first gas tank 551 is connected to the second gas tank 552. The second gas tank 442 is used to stabilize the duty cycle flow fluctuation during the detection process of the assembly 1. The first gas tank 551 is used to stabilize the pressure. A precision flow meter is connected between the first gas tank 551 and the second gas tank 552. The negative pressure end of the second gas tank 552 is connected to the comprehensive performance tester, and the comprehensive performance tester is connected to the air outlet pipe 172 of the cover body 17. The air inlet pipe 171 of the cover body 17 is connected to the atmospheric pressure. At the same time, the docking head 13 is connected to a power source. In this embodiment, the power source connected to the joint part 13 is a programmable power supply. The power supply of the programmable power supply docking head 13 is used to power the valve body 16 (i.e., the solenoid valve) of the assembly 1, thereby realizing the detection of the starting voltage, reset voltage and duty cycle flow of the assembly 1 by the carbon canister desorption valve test system.

[0086] S8: Turn-to-turn detection of assembly 1: Perform impulse voltage detection on assembly 1 using a turn-to-turn tester.

[0087] The plug of the turn-to-turn tester is connected to the joint portion 13, and the assembly 1 is not ventilated. The assembly 1 is subjected to impulse voltage detection by the turn-to-turn tester.

[0088] Since the coil 12 needs to be connected to electricity while the workpiece is undergoing comprehensive performance testing, the valve body 16 will continue to jump. During the comprehensive performance testing of the workpiece by using the negative pressure vacuum detection method or the gas leak detection method, the first gas storage tank 551 is required to be in a normally open state. As the valve body 16 continues to jump, the entire test airflow is in a fluctuating state, so that the air pressure cannot be kept stable during the test, so there will be errors in the detected data.

[0089] Therefore, in the present application, when conducting a comprehensive performance test, power is supplied between the power supply and the connector 13, and the assembly 1 is in an open state, that is, the electromagnetic coil 19 on the side of the winding 12 close to the mounting cavity generates a magnetic field, and the valve body 16 is attracted to the fixed iron core 18 in the mounting cavity, so that the spring 15 is compressed, and the bottom end of the connecting tube 174 is separated from the sealing groove 1421 of the sealing pressure head 142, and the gas can enter the extension tube 173 along the inlet pipe 171, and then flow out from the gap between the connecting tube 174 and the sealing groove 1421 to the outlet pipe 172, and observe the data on the flow test system to judge the flow condition of the desorption valve under a dynamic environment.

[0090] The starting voltage, reset voltage, and flow rate of the valve body at the empty ratio of 20%, the empty ratio of 50%, and the empty ratio of 100% of the assembly 1 are tested by a comprehensive performance tester to see whether they meet the preset requirements.

[0091] Specifically, the starting voltage of the assembly 1 cannot be greater than the set value 1, which can be 8.0V in this embodiment, and the reset voltage of the assembly 1 cannot be lower than the set value 2, which can be 0.7V in this embodiment. The empty ratio of the valve body is the ratio of the time when the valve body is open within a specified time to the total time when the power is turned on. In this embodiment, the assembly 1 needs to be tested under the conditions of 20%, 50%, and 100% of the empty ratio respectively. Since the valve body 16 is in a beating state during the detection process, in order to obtain stable and accurate data for the detection, a stable and continuous negative pressure needs to be provided inside the assembly 1 to keep the air flow rate from entering the assembly 1 in a quantitative manner, thereby obtaining the detection data.

[0092] That is, in order to ensure the accuracy of the tested flow data, the first gas tank 551 and the second gas tank 552 are always kept in an open state, and the power supply parts are alternately opened and closed. That is, after each airtightness test is completed, the test record is carried out through the comprehensive performance tester. During the process, with the alternation of power off and power on, the valve body 16 in the desorption valve can perform continuous jumping action. After repeated operation for no less than three times, the empty ratio, starting voltage, and reset voltage data are observed to determine whether the assembly effect inside the desorption valve meets the standards. At this time, the second air tank 552 can temporarily store compressed air. When the negative pressure inside the first air tank 551 is too high, it can be balanced and stabilized in the second air tank 552; when the air pressure decreases, the gas in the second air tank 552 can be released to replenish the air pressure, thereby maintaining a relatively stable output air pressure; especially when the first air tank 551 is just started, the second air tank 552 can provide a transitional effect, which can provide a more stable air pressure for the assembly 1, and help reduce the accuracy of the test data caused by excessive air pressure fluctuations. On the contrary, if the output of the first air tank 551 is directly connected to the desorption valve, the first air tank 551 may start and stop frequently due to fluctuations in air pressure, which will reduce the service life of the first air tank 551 and increase energy consumption.

[0093] In the present application, the carbon canister desorption valve test system 5 is realized by synchronously collecting the flow simulation signal, starting voltage, and reset voltage of the carbon canister shut-off valve assembly 1, and then calculating the carbon canister desorption flow rate, thereby realizing comprehensive performance testing of the assembly 1, and comprehensively evaluating the comprehensive performance of the product to ensure that it meets the design requirements.

[0094] The turn-to-turn tester performs turn-to-turn detection on the assembly 1, which can ensure that the product has a good working voltage during use and improve the stability of use.

[0095] Through specific testing of the desorption valve, it is possible to carry out comprehensive performance testing of the desorption valve under dynamic conditions, determine the power-on voltage of the wire package 12, and test whether the internal flow through the desorption valve meets the standards, so as to comprehensively evaluate the comprehensive performance of the assembly 1, thereby achieving the purpose of improving the detection accuracy of the empty ratio data, flow data, starting voltage, reset voltage, etc. of the desorption valve and ensuring the performance of the desorption valve.

[0096] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A desorption valve assembly process, characterized in that: The processing steps include: S1: Assembly of the bracket (10): inspect the appearance of the shaft body (11) and the bracket (10) and remove defective products. The shaft body (11) is first assembled on the tooling of the bracket assembly machine (2). Then, the bracket (10) is mounted on the tooling with the bottom facing upward so that the shaft cavity of the bracket (10) is directly opposite to the shaft body (11). Pressure is applied to the bracket (10) to trigger the ejector sensor. The shaft body (11) is fixed in the shaft cavity of the bracket (10) by interference fit through the bracket assembly machine (2). The height of the shaft body (11) protruding from the shaft cavity of the bracket (10) is inspected. S2: Wire package (12) inspection: inspect the appearance of the wire package (12) and the joint part (13), remove defective products, and inspect the performance of the wire package (12) by electrically connecting the joint part (13) with an electric energy tester; S3: Assembling the base components: The base components include a first sealing ring (141), a second sealing ring (143), a spring (15), a valve body (16) and a cover body (17). The second sealing ring (143) is installed on the bottom sealing groove of the wire package (12), and the wire package (12) and the second sealing ring (143) are buckled into the frame. The spring (15) and the valve body (16) are then installed in the installation cavity of the wire package (12) in turn, and the first sealing ring (141) is installed on the top sealing groove of the wire package (12). Finally, the cover body (17) is installed on the top of the wire package (12); S4: Pressing the cover (17): fixing the cover (17) to the outside of the bracket (10) by a cover pressing machine (3) to obtain an assembly (1); S5: Internal leakage detection of the assembly (1): the assembly (1) is subjected to internal leakage detection by using an airtightness detector (4) in conjunction with an internal leakage tool; S6: Overall air tightness test of the assembly (1): Perform an overall air tightness test on the assembly (1) using an air tightness tester (4) in conjunction with an air tightness tool; S7: Comprehensive performance test of the assembly (1): Perform a comprehensive performance test on the assembly (1) through the carbon canister desorption valve test system (5); S8: Turn-to-turn detection of the assembly (1): Perform turn-to-turn detection on the assembly (1) using a turn-to-turn tester.

2. A desorption valve assembly process according to claim 1, characterized in that: The cover body (17) includes a support (175), a plurality of pins (101) are arranged at the top of the bracket (10), and installation holes are respectively provided at the corners of the support (175). In the step S4, the plurality of pins (101) are correspondingly installed in the installation holes, and the pins (101) are punched into a V-shaped structure by the cover body pressing machine (3).

3. A desorption valve assembly process according to claim 2, characterized in that: The cover body (17) includes an air inlet pipe (171) and an air outlet pipe (172) arranged transversely, and the step S5 includes the following processing steps: S5.1: The negative pressure source is connected to the airtightness detector (4), and is connected to the air outlet pipe (172) of the cover body (17) through the airtightness detector (4) to inhale air. The air inlet pipe (171) of the cover body (17) is connected to atmospheric pressure. The assembly (1) is tested for internal leakage through the airtightness detector (4) in conjunction with the internal leakage tool.

4. A desorption valve assembly process according to claim 1, characterized in that: The S7 step includes the following processing steps: S7.1: The negative pressure source is connected to the first gas tank (551), the first gas tank (551) is connected to the second gas tank (552), the second gas tank (552) is used to stabilize the duty cycle flow fluctuation during the detection process of the assembly (1), the first gas tank (551) is used to stabilize the pressure, and the first gas tank (551) is connected to the negative pressure source to generate negative pressure, a precision flow meter is connected between the first gas tank (551) and the second gas tank (552), the negative pressure end of the second gas tank (552) is connected to the comprehensive performance tester, and the comprehensive performance tester is connected to the outlet pipe (172) of the cover body (17), the inlet pipe (171) of the cover body (17) is connected to the atmospheric pressure, and the docking head (13) is connected to the power supply, and the comprehensive performance test of the assembly (1) is performed through the carbon canister desorption valve test system (5).

5. A desorption valve assembly process according to claim 1, characterized in that: The step S8 includes the following processing steps: S8.1: Connect the plug of the turn-to-turn tester to the connector (13), without ventilation of the assembly (1), and perform impulse voltage detection on the assembly (1) using the turn-to-turn tester.

6. A desorption valve assembly process according to claim 3, characterized in that: The S3 step includes the following processing steps: S3.1: snap the first sealing ring (141) into the sealing groove at the top of the line package (12), and install the second sealing ring (143) into the sealing groove at the bottom of the line package (12), movably install the spring (15) and the valve body (16) in the installation cavity of the line package (12) from top to bottom, and insert the shaft body (11) into the installation cavity from bottom to top, so that the spring (15) is arranged between the outer wall of the shaft body (11) and the inner wall of the valve body (16); S3.2: Take the sealing pressure head (142), the sealing pressure head (142) is clamped with the valve body (16), the bottom end of the spring (15) is in contact with the top surface of the fixed iron core (18) in the installation cavity, and the top end is in contact with the top wall of the valve body (16); S3.3: The cover body (17) includes a vertically arranged extension tube (173) and a connecting tube (174), wherein the connecting tube (174) is fixed at the middle part of the extension tube (173), a gap is left between the tube walls of the two, and the side wall of the connecting tube (174) is connected to the air inlet pipe (171), and the bottom end of the connecting tube (174) is connected to the air outlet pipe (172), and the connecting tube (174) is inserted into the installation cavity from top to bottom, and a sealing groove (1421) is provided on the top surface of the sealing pressure head (142) until the bottom end tube wall of the connecting tube (174) is adapted to be plugged into the sealing groove (1421).

7. A desorption valve detection system, characterized in that: Applied to the assembly process described in claim 2, the cover body press machine (3) includes a stamping mechanism, a base (32), and a clamp (33), two of the clamps (33) are arranged on both sides of the base (32), the bracket (10) is installed on the base (32), the wire package (12) assembly is assembled in the middle of the bracket (10), and the multiple pins (101) of the bracket (10) respectively pass through the mounting holes adjacent thereto, the two clamps (33) are respectively pressed against the top surfaces on both sides of the support (175), and the stamping mechanism stamps the pins (101) into a V-shaped structure with an angle of 50°-80°.

8. A desorption valve detection system according to claim 7, characterized in that: The clamp (33) comprises a driving member (331), a first connecting rod (332), a second connecting rod (333), a first swing rod (334) and a second swing rod (335), wherein the first connecting rod (332) and the second connecting rod (333) are fixed in parallel on the top surface of the base (32), the first connecting rod (332) and the first swing rod (334) are assembled via an axis connection, the second connecting rod (333) and the second swing rod (335) are assembled via an axis connection, the first swing rod (334) and the second swing rod (335) are assembled via an axis connection, one end of the first swing rod (334) away from the first connecting rod (332) points to the bracket (10), and the output end of the driving member (331) is assembled with the bottom end of the first connecting rod (332).

9. A desorption valve detection system according to claim 7, characterized in that: The punching mechanism comprises a punching head (311), a power assembly (312) and a shaping piece (313); the output end of the power assembly (312) is assembled with the top end of the punching head (311); the punching head (311) is used to punch a plurality of pins (101) at the same time; the shaping piece (313) is movably installed in the punching head (311); and the shaping piece (313) is used to shape the V-shaped angle of the pins (101).

10. A desorption valve detection system according to claim 8, characterized in that: The carbon canister desorption valve test system (5) comprises a clamping member (51), a first ventilation joint portion (52), and a second ventilation joint portion (53), wherein the clamping member (51) is used to fix the bracket (10), the first ventilation joint portion (52) is assembled with the outlet pipe (172) of the cover body (17), the second ventilation joint portion (53) is assembled with the inlet pipe (171) of the cover body (17), and the negative pressure end of the negative pressure source is assembled with the first ventilation joint portion (52).

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