Gas meter skin film on-line detection assembly integrated equipment and method

Abstract

The application discloses a kind of gas skin film online detection assembly integrated equipment and method.The equipment includes workbench, intermittent rotating installation turntable is equipped on workbench, installation turntable is circumferentially equipped with multiple installation seat for supporting skin film assembly, workbench is sequentially equipped with bottom plate feeding device, diaphragm detection and feeding device, cover plate feeding device and ultrasonic welding device along the direction of rotation of installation turntable;Wherein, diaphragm detection and feeding device carries out quality detection to diaphragm before diaphragm feeding to installation seat, and it includes multiple performance synchronous detection structure, multiple performance synchronous detection structure is formed detection cavity by sealing pressure seat and detection base pressure package, and blow assembly and fluff indicating component are separately arranged in cavity, colored fluff is blown up by airflow passing through diaphragm defect, and the visualization online detection of diaphragm air tightness is realized;The device can eliminate unqualified diaphragm at source, improve skin film assembly assembly consistency and production rhythm efficiency, and reduce material loss.

Description

Technical Field

[0001] This invention relates to the field of gas meter manufacturing equipment technology, and in particular to an integrated automated installation, welding, and online testing equipment for gas meter diaphragm assemblies, as well as an online testing and feeding method for gas meter diaphragms. Background Technology

[0002] Diaphragm gas meters are commonly used gas metering devices in residential and commercial settings. Their metering accuracy and safety depend on the assembly quality of the diaphragm assembly. The diaphragm assembly consists of a base plate, diaphragm, and cover plate stacked from bottom to top and ultrasonically welded together. Driven by the gas pressure difference, it generates a reciprocating thrust, which drives a linkage mechanism to achieve volumetric metering. The diaphragm is the flexible element; its airtightness and tension uniformity affect the metering linearity, zero-point drift, and long-term stability of the gas meter. If the diaphragm itself has pinhole leaks or uneven tension distribution, the diaphragm assembly is prone to metering distortion or gas leakage during long-term reciprocating operation, posing safety hazards.

[0003] Numerous reports have been published regarding the diaphragm and assembly structure of diaphragm gas meters. Chinese Utility Model Patent CN203349881U (A Diaphragm Gas Meter) discloses a structural solution that uses a mechanism and cover to hold the diaphragm, supplemented by seals on both sides to improve sealing. Chinese Utility Model Patent CN203811224U (A Diaphragm Gas Meter Housing Structure) discloses a sealing connection structure between the upper and lower housings of a diaphragm gas meter and an anti-reverse ventilation device. Chinese Invention Patent Application CN111927750A (A Diaphragm Compressor Diaphragm Non-destructive Monitoring System and Method) discloses a method for online non-destructive monitoring of the diaphragm of a diaphragm compressor in operation based on vibration and acoustic emission signals. These solutions explore the reliability of diaphragms from the perspectives of assembly sealing of the finished diaphragm and monitoring the diaphragm's condition during operation.

[0004] However, existing production lines still have the following shortcomings regarding the automated assembly of the membrane assembly itself and the quality control before the membrane is installed: Firstly, the base plate, diaphragm, and cover plate of the membrane assembly are mostly fed independently at decentralized workstations, and then assembled and welded by manual labor or multiple independent equipment. The process is loosely connected, there are many transfers, positioning accuracy is not easy to guarantee, the production line cycle time is long, and it relies on a lot of manual intervention.

[0005] Secondly, the quality inspection of diaphragms is mostly carried out by random sampling or final inspection after the diaphragm assembly is completed or even after the whole machine is assembled. It is difficult to remove defective diaphragms at the source. Once the diaphragm itself has leakage or unqualified tension, the entire diaphragm assembly or even the whole machine will be scrapped after the welding and assembly time has been consumed, resulting in material waste and cycle time loss.

[0006] Third, existing diaphragm testing methods typically only target one of the airtightness or tension performance aspects. Airtightness testing often relies on differential pressure sensors or flow meter readings, with results presented as electrical signals, making on-site interpretation difficult. Tension testing, on the other hand, often relies on independent offline tensile testing machines, whose pressure references are inconsistent, making it difficult to simultaneously reflect the diaphragm's comprehensive performance under assembly conditions. While the vibration signal-based monitoring scheme described in CN111927750A can perform non-destructive monitoring of operating diaphragms, it is designed for diaphragm compressor diaphragms already assembled and in operation, and cannot be used for batch online screening of gas meter diaphragms before installation.

[0007] Therefore, there is a need for an integrated equipment that can combine the processes of base plate loading, diaphragm online inspection, diaphragm feeding, cover plate loading, and ultrasonic welding into a single device, and can simultaneously perform airtightness and tension performance testing before the diaphragm is fed to the mounting base, with the test results readily interpretable, in order to overcome the aforementioned deficiencies. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an integrated automated installation, welding, and online testing device for gas meter diaphragm assemblies. This device integrates automated feeding, assembly, ultrasonic welding of the base plate, diaphragm, and cover plate, as well as online testing of the diaphragm's airtightness and tension, onto the same workbench, achieving continuous assembly and source quality control of the diaphragm assembly. This invention also provides a method for online testing and feeding of gas meter diaphragms based on this integrated device.

[0009] The present invention adopts the following technical solution: An integrated automated installation, welding, and online testing device for a gas meter diaphragm assembly is disclosed. The diaphragm assembly comprises a base plate, a diaphragm, and a cover plate, which are sequentially installed and then ultrasonically heat-riveted together. The integrated device includes a workbench with an installation turntable. Multiple mounting seats for supporting the diaphragm assembly are arranged circumferentially on the installation turntable. Along the rotation direction of the installation turntable, the workbench is sequentially equipped with a base plate loading device, a diaphragm inspection and loading device, a cover plate loading device, and an ultrasonic welding device. The installation turntable rotates intermittently to allow each mounting seat to stop sequentially at one of the aforementioned devices, thereby continuously completing the online testing of the diaphragm and the assembly and heat-riveting of the diaphragm assembly. The diaphragm inspection and loading device performs quality testing on the diaphragm before loading it onto the mounting seats. The diaphragm inspection and loading device includes a feeding seat, a testing base, and a pickup and transfer mechanism. The system includes components and a multi-performance synchronous detection structure. The feeding seat is used to stack diaphragms to be tested. The detection base is used to support the diaphragms during quality testing. The pick-and-transfer assembly is used to transfer and move the diaphragms between the feeding seat, the detection base, and the mounting base. The multi-performance synchronous detection structure is used to detect the airtightness of the diaphragms. The multi-performance synchronous detection structure includes a sealing pressure seat, which can be driven to press and fit with the detection base to form a detection cavity, such that the flange seal of the diaphragm is pressed between the sealing pressure seat and the detection base, and the remaining part of the diaphragm is located within the detection cavity. The detection cavity is equipped with a blowing assembly and a lint indicator assembly located on both sides of the diaphragm and cooperating with each other. The blowing assembly is used to introduce airflow to the corresponding side of the diaphragm, and the lint of the lint indicator assembly is blown up when airflow passes through the diaphragm due to leakage, visually indicating the leakage status of the diaphragm.

[0010] Furthermore, the pickup and transfer assembly includes a cross-shaped moving frame and a sliding guide rail, which work together to achieve movement in three orthogonal directions. The cross-shaped moving frame is connected to an adsorption seat for picking up the membrane. The detection base is provided with at least two bases, all of which are located on the sliding guide rail. The sliding guide rail can drive the detection base to reciprocate between the detection loading station and directly below the sealing pressure seat.

[0011] Furthermore, the fluff indicator component includes a fluff tray arranged around the inner sidewall of the sealing pressure seat. The fluff tray is annular with a hollow center. The fluff tray is evenly and interlaced with mesh and colored fluff. The colored fluff lies flat and adheres when the airflow is calm and stands upright when the airflow passes through the diaphragm.

[0012] Furthermore, the multi-performance synchronous detection structure is also used to detect the tension qualification of the diaphragm. The multi-performance synchronous detection structure also includes a pushing and pressing component disposed in the detection cavity. The pushing and pressing component is used to apply an upward force to the middle of the diaphragm, push the diaphragm a preset distance and make it in an upward tensioned state, so as to observe the deformation amplitude of the diaphragm and determine whether its tension is qualified.

[0013] Furthermore, the push-pressing assembly includes two displacement shafts that slide longitudinally through the detection base, and the two displacement shafts are connected to a push plate. The push plate matches the outline of the square base in the middle of the diaphragm. The upper ends of the two displacement shafts pass through the push plate and form protruding limiting parts. The protruding limiting parts can be inserted into two positioning holes on the diaphragm to limit the diaphragm after the push plate moves a preset distance.

[0014] Furthermore, the power driving the push plate to move upward is the same power source as the power of the blowing assembly. The pressurized airflow generated by the air supply unit that supplies air to the blowing assembly pushes the push plate to move upward, so that the tension detection of the diaphragm and the air tightness detection share the same air pressure reference. A spring is sleeved on the lower part of the displacement shaft, and the spring is used to drive the push plate to move downward and reset after the air supply stops.

[0015] This invention also provides an online inspection and feeding method for gas meter diaphragms, using the integrated equipment described above. The method involves performing quality inspection on the diaphragms before feeding them to the mounting base, and only feeding diaphragms that pass the inspection. The method includes the following steps: S1: The pick-and-transfer assembly transfers the test films stacked on the feeding seat to the detection base and drives them directly below the sealing pressure seat; S2: Press the sealing base with the detection base to form a detection cavity, and press the flange edge of the diaphragm between the sealing base and the detection base, with the rest of the diaphragm located inside the detection cavity; S3: Airflow is introduced into one side of the diaphragm through the air blowing assembly, and the air tightness of the diaphragm is determined by whether the lint of the diaphragm indicator assembly on the other side of the diaphragm is blown up by the airflow passing through the diaphragm. S4: Scrap the diaphragm that fails to meet the airtightness requirements; transfer the diaphragm that meets the airtightness requirements to the mounting base of the mounting turntable via the pick-up and transfer assembly, so that the cover plate can be installed and welded to form the diaphragm assembly in sequence.

[0016] The beneficial effects of this invention are as follows: This invention integrates processes such as base plate loading, diaphragm inspection and loading, cover plate loading, and ultrasonic welding onto a single workbench. The intermittent rotation of the mounting turntable enables automatic connection and cycle time production between these processes, improving the assembly consistency and automation of the diaphragm assembly and reducing manual intervention and transport errors. The diaphragm inspection and loading device is located before the diaphragm is loaded onto the mounting base, performing online quality inspection to remove defective diaphragms at the source. This prevents defective diaphragms from entering subsequent welding and assembly processes, thus avoiding the scrapping of the entire diaphragm assembly and even the entire instrument, reducing material loss and quality risks. The multi-performance synchronous detection structure forms a detection chamber through the press-fitting of a sealed pressure seat and a detection base. A blowing component and a lint indicator component are separately installed within the chamber. Utilizing the phenomenon of colored lint being stirred up by airflow passing through diaphragm defects, the airtightness test results are converted into directly interpretable visual signals, making operation intuitive and independent of sensor readings. Furthermore, by introducing a push-pressing component into the testing chamber, the diaphragm tension and airtightness performance can be determined simultaneously at the same station. Airtightness observation while the diaphragm is under tension also reduces interference from diaphragm relaxation and deformation on the interpretation of lint rise. In the preferred embodiment, the power driving the push plate upwards shares the same air supply unit as the power for the blowing component, ensuring that tension and airtightness testing are conducted under the same air pressure conditions. This reduces testing errors caused by pressure differences between independent air sources, while also simplifying components and reducing energy consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the disassembly and assembly structure of the membrane assembly of the present invention; Figure 2 This is a schematic diagram of the integrated device of the present invention; Figure 3 This is a top view of the integrated device of the present invention; Figure 4 This is a schematic diagram of the structure of the membrane detection and feeding device of the present invention when it is used in conjunction with the mounting turntable; Figure 5 This is a partial structural schematic diagram of the membrane detection and feeding device of the present invention; Figure 6 This is a schematic diagram of the internal structure of the material feeding base and the detection base during the pressing process of the present invention; Figure 7 This is a schematic diagram of the structure when the material feeding base and the detection base are separated; Figure 8 This is a schematic diagram of the structure of the base plate loading device of the present invention; Figure 9 This is a schematic diagram of the cover plate loading device of the present invention.

[0018] Explanation of markings in the diagram: 10. Diaphragm assembly; 11. Base plate; 12. Diaphragm sheet; 13. Cover plate; 121. Flange sealing; 122. Square base; 141. Positioning hole; 142. Positioning shaft; 20. Worktable; 30. Mounting turntable; 31. Mounting seat; 40. Base plate loading device; 41. Fixed seat; 42. Positioning assembly; 421. Base plate placement position; 422. Clamping and handling assembly; 50. Diaphragm sheet detection and loading device; 51. Unloading seat; 52. Detection base; 53. Pick-up and transfer assembly; 531. Cross-shaped moving frame; 532. Sliding guide rail; 533. Adsorption seat; 5321. Detection and loading station. 54. Multi-performance synchronous detection structure, 541. Sealing pressure seat, 542. Lifting cylinder, 543. Detection chamber, 551. Blowing assembly, 5511. Blowing through hole, 552. Fluff indicator assembly, 5521. Fluff tray, 56. Pushing and pressing assembly, 561. Displacement shaft, 561. Protruding limiting part, 562. Pushing plate, 60. Cover plate loading device, 61. Mounting base plate, 62. Cover plate placement position, 63. First adsorption assembly, 64. Pushing column, 65. Infrared sensor, 66. Positioning groove, 67. Second adsorption assembly, 70. Ultrasonic welding device, 80. Finished product stacking device. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. In the following embodiments, the gas membrane assembly is described as having a structure in which a base plate, a diaphragm, and a cover plate are stacked sequentially from top to bottom and then ultrasonically welded together as a whole. The diaphragm with rounded corners and a square base is described as an example, but the scope of protection of the present invention is not limited thereto.

[0020] Example:

[0021] This embodiment provides an integrated device for automated installation, welding, and online testing of the diaphragm assembly of a gas meter. (Reference) Figure 1 The membrane assembly 10 comprises, from bottom to top, a base plate 11, a diaphragm 12, and a cover plate 13, which are installed sequentially and then fixed into a whole by ultrasonic hot riveting. The diaphragm 12 has a rounded rectangular structure with an integrally formed flange edge 121 extending from its outer edge. A square base 122 is recessed in the center and integrated therein. The base plate 11 and cover plate 13 are respectively mounted on both sides of the square base 122. Both the cover plate 13 and the diaphragm 12 have two corresponding positioning holes 141. The base plate 11 has a positioning shaft 142 that is inserted into the two positioning holes 141. During assembly, the positioning shaft 142 passes sequentially through the corresponding positioning holes 141 of the diaphragm 12 and the cover plate 13. Then, the protruding end of the positioning shaft 142 is melted and riveted to the upper surface of the cover plate 13 by ultrasonic hot riveting to form a rivet head, reliably pressing and fixing the three components into a whole. The base plate 11 serves as a power output component, used to transmit the gas pressure difference to generate reciprocating thrust, and together with the cover plate 13 on the other side, forms a bidirectional clamping support for the diaphragm 12.

[0022] To ensure measurement accuracy and operational safety, the diaphragm 12 must meet airtightness and overall tension uniformity requirements. Therefore, a synchronous online quality inspection function is integrated before diaphragm 12 installation. The diaphragm 12 is fixed by tightening the flange seal 121, and then a force is applied to the center of the diaphragm 12 to induce tensile deformation. The overall tension is determined based on the deformation of the diaphragm 12. Simultaneously, pressurized airflow is introduced to one side of the diaphragm 12, while a visual airflow indicator structure (such as a fluffy structure) is installed on the other side to observe airflow leakage and determine if there are any leakage defects in the diaphragm 12.

[0023] refer to Figure 2 , Figure 3 The integrated equipment includes a workbench 20, on which an installation turntable 30 is provided. Mounting seats 31 are evenly spaced along the circumference of the upper end of the installation turntable 30. The mounting seats 31 serve as the carriers for the installation and hot riveting of the membrane assembly 10 and match the contour of the base plate 11. The workbench 20 is arranged in sequence along the rotation direction of the installation turntable 30, including a base plate loading device 40, a membrane detection and loading device 50, a cover plate loading device 60, an ultrasonic hot riveting device 70, and a finished product stacking device 80. The installation turntable 30 rotates intermittently, and the mounting seats 31 on it circulate and stop in sequence at each device, thus completing the entire process of online detection of the membrane 12 and assembly and hot riveting of the membrane assembly 10.

[0024] The membrane detection and feeding device 50 has completed the membrane overlap detection and membrane quality detection before the membrane 12 is fed to the mounting base 31.

[0025] Specifically, refer to Figure 4 , Figure 5 The membrane detection and feeding device 50 includes: The material feeding seat 51 is used to stack the membrane 12 to be tested; The testing base 52, serving as a support for the quality inspection of the diaphragm 12, has the same structure as the feeding base 51. Its outer contour edges are flat and fit the flange seal 121 of the diaphragm 12. The center is recessed, and its recessed contour matches the convex surface contour of the diaphragm 12 (e.g., ...). Figure 7 (as shown) The pick-up and transfer assembly 53 is used to transfer and transport the membrane 12 between the detection base 52, the feeding base 51, and the mounting base 31. It includes a cross-shaped moving frame 531 and a sliding guide rail 532. The two work together to achieve movement in three orthogonal directions. The cross-shaped moving frame 531 is connected to an adsorption seat 533 for picking up the membrane 12. The detection base 52 has at least two of them, all of which are located on the sliding guide rail 532. The multi-performance synchronous detection structure 54 is used to detect the airtightness performance of the diaphragm 12, as referenced. Figure 6It includes a sealing pressure seat 541, on which a lifting cylinder 542 (such as...) is provided. Figure 4 As shown, the sealing pressure seat 541 can be moved down and pressed into the detection base 52 to form a detection cavity 543. At this time, the flange sealing edge 121 of the diaphragm 12 is pressed between the edge contour of the sealing pressure seat 541 and the detection base 52, while the rest is placed in the detection cavity 543. The detection cavity 543 is provided with a blowing assembly 551 and a lint indicator assembly 552 for detecting air tightness. The two cooperate with each other and are respectively located on both sides of the diaphragm 12. Airflow is introduced into the corresponding side of the diaphragm 12 through the blowing assembly 551, and it is observed whether the airflow passes through the diaphragm 12 due to leakage, causing the lint on the other side to be lifted.

[0026] refer to Figure 7 The blowing assembly 551 includes a blowing through hole 5511 opened in the detection base 52 and an air supply unit (not shown in the figure) connected to the bottom of the blowing through hole 5511. The fluff indicator assembly 552 includes a fluff tray 5521, which is arranged around the inner side wall of the sealing pressure seat 541. The tray is evenly and interlaced with mesh and colored fluff (not shown in the figure). When the airflow is calm, the colored fluff naturally falls down and adheres. When there is a leak in the diaphragm 12, the pressurized airflow on the lower side blows the colored fluff upward through the leak hole, and the fluff stands up and rises, realizing the visual detection of airtightness. At the same time, a visual inspection camera (not shown in the figure) is also provided in the detection chamber 543.

[0027] refer to Figure 6 The above-described lint-indicating airtightness test of the present invention has good tolerance for the tightness of the edge sealing at the flange seal 121 between the sealing pressure seat 541 and the detection base 52. Specifically, even if the edge sealing between the sealing pressure seat 541 and the detection base 52 is not tight enough, and there is a certain edge micro-leakage between the flange seal 121 of the diaphragm 12 and the pressure seat / base, the airflow path generated by this micro-leakage will dissipate downward and outward along the outer side of the flange seal 121 of the diaphragm 12 (e.g., Figure 6(As indicated by the arrows on both outer sides of the detection base 52), the colored fluff of the fluff indicator component 552 is placed on the fluff tray 5521 located above the diaphragm 12 inside the detection cavity 543. The airflow direction required for the fluff to rise must be an airflow that penetrates the defect of the diaphragm 12 from below and pushes the fluff upward. The airflow direction generated by the edge micro-leakage is inconsistent with the airflow direction required for the fluff to rise and does not pass through the cavity area where the fluff is located. Therefore, this part of the leaked airflow will not have much impact on the fluff's rising state, thus preventing misjudgment of the airtightness test results. In other words, the visual airtightness test method of the present invention is directionally selective, responding only to the airflow "through the diaphragm upward" and is naturally insensitive to micro-leakage "along the edge outward". This reduces the dependence on the edge pressing accuracy of the sealing pressure seat 541 and the detection base 52 and the state of the seal, improving the robustness of the test process.

[0028] Further, refer to Figure 6 The multi-performance synchronous detection structure 54 is also used to detect the tension qualification of the diaphragm 12. This is achieved by setting a pushing and pressing component 56 in the detection cavity 543. The pushing and pressing component 56 applies an upward force to the diaphragm 12, pushing the diaphragm 12 upward a preset distance and making it in an upward flipped state. Then, the deformation amplitude of the diaphragm 12 is observed with the help of a visual inspection camera to determine whether its overall tension is qualified. (The visual inspection camera here can be shared with the visual inspection camera mentioned above, or multiple visual inspection cameras can be set according to actual application needs to ensure the reliability of the acquisition of colored fluff and the deformation of the diaphragm 12.)

[0029] The aforementioned state of lifting and flipping the diaphragm 12 also allows the diaphragm 12 to maintain a stable tension state. Using this tension state to observe colored fibers can eliminate the interference caused by the relaxation and deformation of the diaphragm 12 itself on the airtightness judgment.

[0030] Specifically, refer to Figure 6 , Figure 7 The push-pressing assembly 56 includes two displacement shafts 561 that slide longitudinally through the detection base 52. The two displacement shafts 561 are connected to a push plate 562, which matches the contour of the square base 122 in the center of the diaphragm 12. Correspondingly, the lint tray 5521 is annularly arranged, with a hollowed-out center corresponding to the square base 122 to reduce unnecessary observation areas of the lint. Furthermore, the upper ends of the two displacement shafts 561 pass through the push plate 562 and form protruding limiting portions 5611 that can be inserted into the two positioning holes 141 on the diaphragm 12. When the push plate 562 moves a preset distance, the protruding limiting portions 5611 pass through the positioning holes 141 to limit the diaphragm 12, preventing it from shifting under the airflow of the blowing assembly 551.

[0031] In the above design, the push plate 562 matches the contour of the square base 122, utilizing the pre-installed assembly structure of the diaphragm 12 center cover plate 13, which allows for uniform application of push force to the base. Furthermore, the square base 122 area is subsequently sealed and fixed to the base plate 11 and cover plate 13 by ultrasonic hot riveting. Similarly, the flange seal 121 of the diaphragm 12 will also be connected to the gas meter housing later, and is not the area to be tested for air tightness. Therefore, colored felt can be applied to the area between the flange seal 121 and the center base.

[0032] Furthermore, the power driving the push plate 562 upward is the same as the power driving the blowing assembly 551, which is the pressurized airflow generated by the air supply unit that pushes the push plate 562 upward. The airflow pressure and holding time meet the following requirements: when the diaphragm 12 is in good condition, the pressurized airflow can push the push plate 562 to move a preset distance, causing the diaphragm 12 to stretch and deform; if there is a leak, the airflow can pass through the leak hole of the diaphragm 12 and blow the colored fluff up. Correspondingly, a spring (not shown in the figure) is also sleeved on the lower part of the displacement shaft 561 to drive the push plate 562 downward to reset after the air supply detection stops.

[0033] The structure that shares a single power source allows two testing processes to be completed simultaneously through a single power source, unifying the airflow pressure benchmark and ensuring that the air pressure conditions for tension testing and airtightness testing are consistent, thus reducing the testing errors caused by the pressure difference between the two independent air sources; at the same time, it can also simplify the components of the whole machine and reduce energy consumption.

[0034] It should be noted that under the single gas source shared structure, leakage of diaphragm 12 will cause chamber depressurization, reduce the pushing force of push plate 562, and cause a slight deviation in tension detection value, but will not change the qualification judgment result of diaphragm 12; and diaphragm 12 is a high-precision component, and if a defect is detected, it will be scrapped directly, without needing to distinguish the defect type.

[0035] In another embodiment, a separate power mechanism is provided at the lower end of the displacement shaft 561 to drive its up and down movement, and the tension detection process precedes the airtightness detection process, so that the diaphragm 12 is already in a stable tensioned state during the airtightness detection. In this way, the pushing force and the detection air pressure can be adjusted separately, there is no pressure leakage interference, the detection values ​​are accurate, and it can distinguish between two types of defects: tension and air leakage.

[0036] Furthermore, the air supply unit adopts a bidirectional air pump, which can input positive pressure into the detection chamber 543 for detection, or input negative pressure to adsorb the membrane 12 to descend and restore the initial state of sinking.

[0037] The specific process by which the membrane detection and feeding device 50 performs its own quality detection and feeding is as follows: The test diaphragm 12 on the feeding seat 51 is transferred to the detection base 52 via the cross-shaped moving frame 531 and the adsorption seat 533. Then, the detection base 52 is moved to the underside of the sealing pressure seat 541 via the sliding guide rail 532. Then, the lifting cylinder 542 is activated to drive the sealing pressure seat 541 to move down. The sealing pressure seat 541 presses the flange seal 121 of the diaphragm 12 between itself and the detection base 52, and the middle part of the diaphragm 12 is placed in the detection cavity 543. Next, the air supply unit is activated to input positive pressure airflow, which is delivered upward through the air blowing hole 5511 of the detection base 52. The pressurized airflow pushes the push plate 562 and the displacement shaft 561 upward. Under the combined action of the airflow and the push plate 562, the diaphragm 12 flips up and deforms into an upward convex state. Then, the visual inspection camera is used to observe whether the colored fluff is raised and whether the deformation of the diaphragm 12 exceeds the allowable range. If the test results for either tension or air tightness are abnormal, the diaphragm 12 is deemed to be of abnormal quality and is scrapped. After the test is completed, the air supply unit is switched to input reverse airflow, and the push plate 562 moves down to reset under the combined action of negative pressure and spring. The diaphragm 12 then resets by descending under negative pressure.

[0038] If the test is successful, the above-mentioned reset process is performed. Then, the lifting cylinder 542 is driven to move the sealing pressure seat 541 upward, separating it from the test base 52. Next, the sliding guide rail 532 is controlled to move the test base 52 below the sealing pressure seat 541 in the opposite direction to the test loading station 5321. Using the cross moving frame 531 and its suction seat 533, the diaphragm 12 is picked up and moved to the corresponding mounting seat 31 on the mounting turntable 30. At this time, the test base 52 at the test loading station 5321 is empty, and the above operation can be repeated for testing and loading.

[0039] To facilitate the transport of the diaphragm 12 from the feeding seat 51 to directly below the sealing pressure seat 541, the sliding guide rail 532 also has a detection and loading station 5321, located directly below the end of the cross-shaped moving frame 531. The cross-shaped moving frame 531 moves longitudinally and horizontally, and in conjunction with the adsorption seat 533 on it, the diaphragm 12 can be picked up, transported, and placed between the feeding seat 51 and the loading station. The sliding guide rail 532 moves horizontally, enabling the transfer of the detection base 52 between the detection and loading station 5321 and directly below the sealing pressure seat 541.

[0040] The specific process of feeding the diaphragm 12 is as follows: First, control the sliding guide rail 532 to slide the detection base 52, which is closer to the cross moving frame 531, to the feeding station. The cross moving frame 531 and the adsorption seat 533 pick up the diaphragm 12 on the feeding seat 51 and move it to the detection base 52 at the detection feeding station 5321. Then, start the sliding guide rail 532 to move the detection base 52 at the detection feeding station 5321 to directly below the sealing pressure seat 541. Then, drive the sealing pressure seat 541 to move down and press it into place with the detection base 52 to perform quality inspection on the diaphragm 12 inside.

[0041] Preferably, the diaphragm 12 overlap detection structure is located between the detection and loading station 5321 and the sealing pressure seat 541 to complete the overlap screening of the diaphragm 12 online synchronously and to make a preliminary judgment before the performance test of the diaphragm 12 (the diaphragm overlap detection structure is an existing mature application technology and is not shown in the figure).

[0042] Furthermore, to improve the overall operating structure of this equipment, a brief description of the remaining devices will be provided.

[0043] refer to Figure 8 The base plate loading device 40 includes a fixed base 41, and a positioning component 42 is slidably connected to the fixed base 41. The positioning component 42 has a base plate placement position 421. The base plate 11 is positioned and placed by setting an infrared contact on the side wall of the base plate placement position 421, so as to facilitate the subsequent gripping, handling and placement of the base plate 11. A clamping and handling component 422 is set above the base plate placement position 421. The clamping and handling component 422 realizes spatial movement and handling through a three-way moving mechanism.

[0044] refer to Figure 9 The cover plate loading device 60 includes a slidingly connected mounting base plate 61. Multiple cover plate placement positions 62 are formed on the mounting base plate 61 by an array of multiple railings. Each cover plate placement position 62 can hold multiple cover plates 13. A first adsorption component 63 that can move in multiple directions is provided above it for adsorbing the cover plates 13.

[0045] refer to Figure 9 Each cover plate placement position 62 has a through hole at its lower end, through which a longitudinally movable push column 64 is inserted. The push column 64 moves upward as the cover plate 13 is sucked up and transported. Correspondingly, an infrared sensor 65 is configured. When the upper cover plate 13 is detected to be moving, the push column 64 moves upward a certain distance and repeats the cycle. Compared with directly using the adsorption component to suck up the material, this method can automatically lift and stack the cover plates 13, ensuring that the adsorption component picks up material at a consistent height each time, avoiding bias or missed suction; and it is also convenient for the sensor to monitor the remaining material in real time, realizing continuous feeding without the need for frequent manual replenishment.

[0046] Furthermore, the cover plate 13 and the cover plate mounting position 62 are usually reserved for assembly to facilitate the stacking and replenishment of materials and the continuous lifting and moving of the cover plate 13. However, the gap will cause the cover plate 13 to be placed in a different position, resulting in a positioning deviation when adsorbing and picking up materials, which will lead to poor alignment in subsequent assembly.

[0047] Therefore, refer to Figure 9 It also has a positioning groove 66 for secondary positioning. The positioning groove 66 has a structure that is wider at the top and narrower at the bottom, and the bottom matches the contour of the cover plate 13. After the adsorption component picks up the cover plate 13 from the cover plate placement position 62, it is first placed in the positioning groove 66. The positioning groove 66 guides the cover plate 13 to slide down to the bottom of the groove and flatten it through the inclined inner side wall, eliminating the positional deviation caused by the previous material picking step. Then, using the added second adsorption component 67, through its preset stroke action, it picks up the cover plate 13 in the positioning groove 66 and moves it to the corresponding mounting seat 31 of the mounting turntable 30 to complete the assembly.

[0048] The ultrasonic welding device 70 and the finished product stacking device 80 are existing products, and will not be described in detail here.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated automated installation, welding, and online testing device for a gas meter diaphragm assembly, wherein the diaphragm assembly (10) comprises a base plate (11), a diaphragm (12), and a cover plate (13) in sequence, and is installed and welded together; the integrated device comprises a workbench (20), wherein an installation turntable (30) is provided on the workbench (20), and the installation turntable (30) is provided with multiple mounting seats (31) for supporting the diaphragm assembly (10) along its circumference; the workbench (20) is provided with a base plate loading device (40), a diaphragm testing and loading device (50), a cover plate loading device (60), and an ultrasonic welding device (70) in sequence along the rotation direction of the installation turntable (30); the installation turntable (30) rotates intermittently so that each mounting seat (31) stops at the above-mentioned devices in sequence, thereby continuously completing the online testing of the diaphragm (12) and the assembly and ultrasonic welding and riveting of the diaphragm assembly (10); Its features are, The membrane inspection and feeding device (50) is used to perform quality inspection on the membrane (12) before feeding the membrane (12) to the mounting base (31), and the membrane inspection and feeding device (50) includes: Feeding seat (51) is used to stack the membrane (12) to be tested; The test base (52) is used to support the membrane (12) during the quality inspection of the membrane (12). Pick-up and transfer assembly (53) for transferring the diaphragm (12) between the feeding seat (51), the detection base (52), and the mounting base (31); and A multi-performance synchronous detection structure (54) is used to detect the airtightness of a diaphragm (12). The multi-performance synchronous detection structure (54) includes a sealing pressure seat (541), which can be driven to press and fit with a detection base (52) to form a detection cavity (543), and presses the flange seal (121) of the diaphragm (12) between the sealing pressure seat (541) and the detection base (52), while the rest of the diaphragm (12) is located in the detection cavity. Inside the cavity (543); the detection cavity (543) is provided with a blowing assembly (551) and a lint indicator assembly (552) respectively disposed on both sides of the diaphragm (12) and cooperating with each other. The blowing assembly (551) is used to introduce airflow to the corresponding side of the diaphragm (12). The lint of the lint indicator assembly (552) is used to be blown up when the airflow passes through the diaphragm (12) due to leakage, so as to visually indicate the leakage of the diaphragm (12).

2. The integrated device according to claim 1, characterized in that, The pickup and transfer assembly (53) includes a cross-shaped moving frame (531) and a sliding guide rail (532), which work together to achieve movement in three orthogonal directions. The cross-shaped moving frame (531) is connected to an adsorption seat (533) for picking up the membrane (12). The detection base (52) has at least two of them, all located on the sliding guide rail (532). The sliding guide rail (532) can drive the detection base (52) to reciprocate between the detection loading station (5321) and the sealing pressure seat (541).

3. The integrated device according to claim 1, characterized in that, The fluff indicator component (552) includes a fluff tray (5521) arranged around the inner wall of the sealing pressure seat (541). The fluff tray (5521) is annular and hollow in the middle. The fluff tray (5521) is evenly and interlaced with mesh and colored fluff. The colored fluff lies flat and adheres when the airflow is calm and stands upright when the airflow passes through the diaphragm (12).

4. The integrated device according to claim 1, characterized in that, The multi-performance synchronous detection structure (54) is also used to detect the tension qualification of the diaphragm (12). The multi-performance synchronous detection structure (54) also includes a push-pressing component (56) disposed in the detection cavity (543). The push-pressing component (56) is used to apply an upward force to the middle of the diaphragm (12), push the diaphragm (12) a preset distance and make it in an upward tensioned state, so as to observe the deformation amplitude of the diaphragm (12) and determine whether its tension is qualified.

5. The integrated device according to claim 4, characterized in that, The push-pressing assembly (56) includes two displacement shafts (561) that slide longitudinally through the detection base (52). The two displacement shafts (561) are connected to a push plate (562). The push plate (562) matches the outline of the square base (122) in the middle of the diaphragm (12). The upper ends of the two displacement shafts (561) pass through the push plate (562) and form a protruding limiting part (5611). The protruding limiting part (5611) can be inserted into two positioning holes (141) on the diaphragm (12) to limit the diaphragm (12) after the push plate (562) moves a preset distance.

6. The integrated device according to claim 5, characterized in that, The power that drives the push plate (562) to move upward is the same power source as the power of the blower assembly (551). The pressurized airflow generated by the air supply unit that supplies air to the blower assembly (551) pushes the push plate (562) to move upward, so that the tension detection of the diaphragm (12) and the air tightness detection share the same air pressure reference. A spring is sleeved on the lower part of the displacement shaft (561), and the spring is used to drive the push plate (562) to move downward and reset after the air supply stops.

7. An online detection and feeding method for gas meter diaphragms, employing the integrated equipment as described in claim 1, characterized in that, Before feeding the diaphragm (12) to the mounting base (31), a quality inspection of the diaphragm (12) is completed, and only diaphragms (12) that pass the inspection are fed, including the following steps: S1: The test membrane (12) stacked on the feeding seat (51) is transferred to the detection base (52) by the pick-up and transfer component (53) and driven to the direct under the sealing pressure seat (541); S2: Press the sealing base (541) and the detection base (52) together to form a detection cavity (543), and press the flange seal (121) of the diaphragm (12) between the sealing base (541) and the detection base (52), with the remaining part of the diaphragm (12) located inside the detection cavity (543); S3: Airflow is introduced into one side of the diaphragm (12) through the air blowing assembly (551), and the air tightness of the diaphragm (12) is determined to be qualified based on whether the lint of the lint indicator assembly (552) on the other side of the diaphragm (12) is blown up by the airflow passing through the diaphragm (12). S4: Discard any diaphragm (12) that does not meet the airtightness requirements; transfer any diaphragm (12) that meets the airtightness requirements to the mounting base (31) of the mounting turntable (30) via the pick-up and transfer assembly (53) for subsequent installation of cover plates (13) and welding to form a diaphragm assembly (10).

8. The online detection and feeding method for gas meter diaphragms according to claim 7, characterized in that, In step S3, while airflow is introduced into one side of the diaphragm (12), the airflow pushes the push-pressing component (56) in the detection cavity (543) to apply an upward force to the middle of the diaphragm (12), so that the diaphragm (12) is pushed a preset distance and is in an upward tensioned state; at the same time, it is determined whether the tension of the diaphragm (12) is qualified based on whether the deformation amplitude of the diaphragm (12) exceeds the allowable range; in step S4, the diaphragm (12) that fails to meet either the tension or the air tightness is scrapped, and only the diaphragm (12) that meets both the tension and the air tightness is loaded onto the mounting base (31).

9. The online detection and feeding method for gas meter diaphragms according to claim 8, characterized in that, After step S3 is completed, the airflow to the corresponding side of the diaphragm (12) is stopped, and the air supply unit is switched to input reverse airflow to the detection chamber (543). The push plate (562) of the push pressure assembly (56) moves down and resets under the dual action of the reverse airflow and the spring at the bottom of the displacement shaft (561). At the same time, the diaphragm (12) is pulled down by negative pressure and returns to its initial state. Then the sealing pressure seat (541) is driven to move up and separate from the detection base (52). The qualified diaphragm (12) is then transferred to the mounting base (31) by the pick-up and transfer assembly (53).

10. The online detection and feeding method for gas meter diaphragms according to claim 7, characterized in that, The picking and transferring component (53) is equipped with at least two detection bases (52) on the sliding guide rail (532). The method is carried out in a dual-station reciprocating flow mode: when one detection base (52) is located directly below the sealing pressure seat (541) and performs the detection in steps S2-S3, the other detection base (52) is simultaneously located at the detection loading station (5321) to receive the next piece of membrane to be tested (12) transferred from the unloading seat (51); after the membrane (12) on the previous detection base (52) is detected and processed according to step S4, the sliding guide rail (532) drives the two detection bases (52) to exchange positions, so that the next piece of membrane (12) enters the detection station and the empty detection base (52) returns to the detection loading station (5321) to receive the new piece of membrane to be tested (12), and so on.

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