Multi-station push plate filter leak detection machine

Abstract

The present application relates to a kind of leak detection machine, in particular to a kind of multi-station push plate filter leak detection machine.It includes organism, water tank is provided on the organism, water tank bottom is provided with the water inlet assembly of water tank water inlet, at least two placement seats for placing filter cartridge are provided in water tank, adjusting assembly for adjusting the position of placement seat is provided in water tank, the inner side wall of water tank one end is provided with at least two corresponding placement seat setting resistance seal seat, the air inlet assembly for filter cartridge air inlet is provided on the resistance seal seat, the body is also provided with at least two push plate assemblies corresponding to placement seat, each push plate assembly is provided with the sealing cover for filter cartridge sealing, the adjusting mechanism for adjusting the horizontal position of push plate assembly is provided on the body, the push plate assembly is provided with the lower pressing assembly for the lower pressing of push plate assembly.The present application provides a kind of multi-station push plate filter leak detection machine with high degree of automation and high detection efficiency.

Description

Technical Field

[0001] This invention relates to a leak detection machine, and more particularly to a multi-station push plate filter leak detection machine. Background Technology

[0002] Currently, leak testing for air tightness is a crucial step in the filter manufacturing process for determining product quality. At present, factories commonly use a manual immersion leak test method. Operators manually place the sealing cap on the end of the filter cartridge, tighten the seal, and then immerse it in water to complete the leak test. This method is highly dependent on manual operation; the entire process of manually installing the cap, tightening it, and placing the workpiece is cumbersome, time-consuming, and extremely inefficient, making it completely unsuitable for the pace of large-scale, continuous industrial production of filters. Furthermore, manual tightening of the seal is highly unpredictable; uneven force or incomplete tightening can lead to a poor seal at the filter cartridge end face, easily resulting in hidden leaks during testing, causing missed or false leaks, and ultimately, inadequate product testing and poor reliability. In addition, most existing traditional leak detection equipment has a single-station structure, which can only test one piece at a time, severely limiting production capacity. Moreover, the equipment structure is highly fixed, and the station spacing and filter cartridge support position are mostly not adjustable, making it difficult to adapt to the testing of filters with different lengths and outer diameters. The equipment has poor versatility, and the traditional single-station independent adjustment method also has the problems of cumbersome debugging, poor station consistency, and insufficient adaptability.

[0003] Furthermore, existing immersion leak testing equipment is prone to floating and lateral displacement of the filter cartridge after inflation during the testing process. This can easily lead to loose seals at both ends of the filter cartridge and air leakage at the end face, resulting in misjudgments and missed detections, making it difficult to guarantee testing accuracy and stability. Traditional equipment often suffers from force interference between its horizontal adjustment mechanism and downward pressing structure. Long-term operation can cause wear and tear on precision adjustment components and transmission deviations, resulting in poor equipment stability and a short service life. Simultaneously, existing equipment has a low degree of automation, high human intervention, and significant human error. Moreover, the equipment has low structural integration, inconvenient disassembly and maintenance of vulnerable parts, high maintenance costs, poor consistency of multi-station testing parameters, and insufficient stability of batch testing data, making it difficult to meet the high-precision, high-efficiency, and standardized batch testing production requirements of modern filters. Summary of the Invention

[0004] To address the aforementioned technical deficiencies, this invention provides a multi-station push plate filter leak tester with a high degree of automation and high detection efficiency.

[0005] The technical solution provided by this invention is: a multi-station push plate filter leak tester, comprising a body, a water tank on the body, a water inlet component at the bottom of the water tank for water inlet, at least two placement seats for placing filter cartridges inside the water tank, an adjustment component for adjusting the position of the placement seats inside the water tank, at least two contact sealing seats corresponding to the placement seats on the inner side wall of one end of the water tank, an air inlet component for air inlet to the filter cartridges on the contact sealing seats, at least two push plate assemblies corresponding to the placement seats on the body, each push plate assembly having a sealing cover for sealing the filter cartridges, an adjustment mechanism for adjusting the horizontal position of the push plate assemblies on the body, and a pressing component for pressing down the push plate assemblies above the push plate assemblies.

[0006] Using the above technical solution, the water tank serves as the immersion leak testing chamber. Water is supplied to the tank through the water inlet assembly to create an immersion testing environment. The filter cartridge to be tested is placed horizontally on a placement seat inside the tank, and multiple placement seats enable simultaneous operation at multiple stations. A sealing seat at one end of the tank, in conjunction with a sealing cap at the end of the push plate assembly, axially clamps and seals both ends of the filter cartridge. The air inlet assembly introduces testing air pressure into the sealed filter cartridge, and the water inlet completely immerses the filter cartridge for leak testing. The adjustment assembly allows for fine-tuning of the placement seat's installation position to accommodate filter cartridges of different shapes and sizes. The adjustment mechanism allows for synchronous adjustment of the horizontal installation spacing of the push plate assembly to accommodate filter cartridges of different lengths, ensuring consistent spacing across multiple stations and quick changeover adjustments. During testing, the pressing assembly applies downward pressure to the push plate assembly from above. This downward pressure is transmitted through the push plate assembly to the filter cartridge it clamps, creating radial compression and limiting from above. This effectively prevents the filter cartridge from floating or shifting after inflation, ensuring a stable and reliable axial seal. This invention adopts a multi-station synchronous structure design, overcoming the shortcomings of low detection efficiency in traditional single-station testing and significantly improving the efficiency of batch leak detection for filters. By integrating position adjustment, spacing synchronous adjustment, and downward pressure limit multiple adaptation structures, it can be compatible with the testing of filters of different lengths and outer diameters, making the equipment highly versatile. Through a dual limit structure of axial sealing and radial indirect pressing, it completely solves the problems of filter cartridge inflation and floating, loose sealing, and misjudgment of leak detection, effectively improving leak detection accuracy and testing stability.

[0007] The invention is further configured such that: the adjustment assembly includes a fixed plate with a fixed placement seat, adjustment plates located on both sides below the fixed plate, and an installation plate located below the adjustment plates and parallel to the adjustment plates; the installation plate is fixed to the side wall of the water tank via side plates; guide rods are vertically arranged on both sides of the adjustment plates, and threaded adjustment sleeves are provided on the guide rods; the adjustment plates are connected to the threaded adjustment sleeves; an upper adjustment plate is provided above the adjustment plates, and a top plate is provided above the upper adjustment plate; the top plate and the upper adjustment plate are respectively fixedly connected to the upper ends of the guide rods; a screw rod is provided on the top plate, the lower end of the screw rod passes through the upper adjustment plate and can abut against the fixed plate, and a handle is provided on the upper end of the screw rod.

[0008] Using the above technical solution, the mounting plate is fixed to the side wall of the water tank via a side plate, forming an integral fixed base. By rotating the threaded adjustment sleeve, the adjustment plate can be moved up and down along the vertical guide rod, achieving fine adjustment of the vertical support height of the placement seat. Loosening the screw to disengage the lower end from the fixed plate allows the fixed plate to be manually pushed horizontally along the filter cartridge axis, adjusting the front and rear position of the placement seat to adapt to the axial positioning requirements of different filter cartridges. After adjustment, rotating the screw with the handle causes its lower end to press against the fixed plate, locking the fixed plate in place. This structure, through the combination of "threaded adjustment sleeve sliding + screw abutment locking," achieves bidirectional independent adjustment of the vertical height and axial position of the placement seat. It is simple in structure, convenient to operate, and provides stable locking, effectively adapting to the placement and support requirements of filter cartridges of different shapes and sizes. The overall adjustment accuracy is high, the locking stability is good, and it is not prone to shifting or loosening over long-term use. The overall structure is fixed to the side wall of the water tank, resulting in strong structural rigidity, small space occupation, and good consistency in multi-station synchronous fine-tuning, effectively ensuring the horizontality and alignment accuracy of the filter cartridges at each station.

[0009] The present invention is further configured such that: the placement seat is provided with a placement groove, and the placement seat is fixed to the fixing plate by screws.

[0010] Using the above technical solution, the placement seat is detachably locked to the fixing plate with screws, making disassembly and assembly convenient and easy to replace and maintain. A placement groove is opened on the top of the placement seat, which matches the outer contour of the filter cartridge. The horizontally placed filter cartridge is snapped and limited inside the placement groove. The limiting structure of the placement groove achieves front-to-back and left-to-right limiting of the filter cartridge, ensuring uniform placement posture and accurate station alignment during filter cartridge testing. The placement groove structure provides stable support and limiting for the filter cartridge, preventing rolling and displacement during testing and ensuring accurate sealing and alignment at both ends. The detachable screw structure facilitates quick replacement of placement seats with different groove types to accommodate filter cartridges of different outer diameters, broadening the equipment's compatibility. The structure is simple and reliable, with low maintenance and replacement costs, and high consistency in multi-station operations.

[0011] The present invention is further configured such that: the push plate assembly includes a push plate cylinder and a piston rod connected to the push plate cylinder; the other end of the machine body is provided with a cylinder mounting plate, the push plate cylinder is located on the cylinder mounting plate; the other end of the water tank is provided with a sealing cover side plate, the sealing cover side plate is provided with a guide seat, one end of the piston rod is connected to the push plate cylinder, and the other end passes through the guide seat and is positioned above the water tank to connect with the sealing cover.

[0012] Using the above technical solution, the pusher cylinder is fixedly installed at the end of the machine body via a cylinder mounting plate, ensuring stable installation. During the extension and retraction of the piston rod, it passes through a guide seat, which radially guides and limits the piston rod, preventing it from swaying or becoming eccentric. The pusher cylinder drives the piston rod to extend, causing the end sealing cap to move towards the inside of the water tank. This, in conjunction with the fixed sealing seat on the opposite side, clamps both ends of the filter cartridge, achieving axial sealing at both ends and providing a tight seal for subsequent air-filling leak testing. After testing, the piston rod retracts, releasing the filter cartridge and completing the reset. The automatic cylinder-driven sealing replaces manual clamping, resulting in high automation and uniform clamping force. The guide seat limiting structure effectively prevents eccentric swaying of the piston rod, ensuring the sealing cap is perpendicularly aligned with the filter cartridge end face, resulting in a good sealing fit. Multiple pusher assemblies operate independently and synchronously, significantly improving multi-station testing efficiency, providing strong clamping and sealing stability, and effectively preventing air leakage failure during testing.

[0013] The invention is further configured such that: the adjustment mechanism includes a servo motor, an adjustment gear, and an adjustment screw; a motor mounting base is provided on the cylinder mounting plate; the servo motor is fixed on the motor mounting base; the adjustment gear includes a main gear connected to the servo motor and at least two driven gears; an adjustment fixing plate parallel to the cylinder mounting plate is provided above the other end of the water tank on the machine body; the adjustment screw passes through the cylinder mounting plate and forms a threaded engagement with the cylinder mounting plate; one end of the adjustment screw is rotatably supported on the adjustment fixing plate, and the other end is rotatably supported on the side plate of the sealing cover; the driven gear is fixedly connected to the adjustment screw, and the driven gear is connected to the main gear through a chain.

[0014] Using the above technical solution, the servo motor drives the main gear to rotate, and the main gear synchronously drives all driven gears to rotate synchronously via a chain. The driven gears are fixedly linked with the adjusting screws, thereby driving multiple adjusting screws to rotate synchronously. Since the adjusting screws are threadedly engaged with the cylinder mounting plate, and both ends are rotatably supported on the two fixed plates, the rotation of the adjusting screws can be converted into linear motion, driving the cylinder mounting plate to move horizontally as a whole, synchronously adjusting the clamping distance between multiple sets of push plate assemblies and the opposite contact sealing seats, realizing synchronous and equal adjustment of the spacing at multiple workstations, adapting to the installation and clamping requirements of filter cartridges of different lengths and specifications. After adjustment, the servo motor locks the fixed spacing. The servo + chain + gear synchronous transmission structure realizes one-click synchronous adjustment of the push plate spacing at multiple workstations, completely solving the drawbacks of traditional equipment such as individual adjustment at a single workstation, inconsistent workstation spacing, and cumbersome debugging; the synchronous adjustment has high precision, good workstation consistency, and fast batch changeover debugging speed, greatly improving production adaptation efficiency; the mechanical chain and gear transmission has high load-bearing capacity and strong stability, with no deviation during long-term operation, making it suitable for batch industrial testing scenarios. The present invention is further configured such that: the pressing assembly includes at least two pressure rods, a pressure plate, a pressure plate cylinder, and a pressure plate cylinder shaft; the cylinder mounting plate has a through hole for the pressure rod to pass through; one end of the pressure rod is rigidly fixedly connected to the sealing cover side plate, and the other end passes through an adjusting and fixing plate; the sealing cover side plate has an installation step, which abuts against the machine body and the sealing cover side plate can move vertically along the machine body; the pressure plate is located above the pressure rod and is fixedly connected to the pressure rod; the machine body has a pressure plate cylinder mounting plate, the pressure plate cylinder is fixed on the pressure plate cylinder mounting plate, one end of the pressure plate cylinder shaft is connected to the pressure plate cylinder, and the other end is connected to the pressure plate; the pressure plate cylinder is also provided with a second adjusting mechanism for adjusting the position of the pressure plate cylinder.

[0015] Using the above technical solution, the pressure rod and the cylinder mounting plate are connected by a through-hole structure, and the two are not rigidly bound to each other. When the pressure plate cylinder drives the pressure rod to move downward, the cylinder mounting plate is kept at a fixed height by the horizontal locking limit of the adjusting screw, and the pressure rod can pass through the through hole of the cylinder mounting plate and move downward freely, naturally forming a vertical relative displacement with the cylinder mounting plate. This through-hole limiting structure ingeniously separates the force of the downward pressing action from the force of the horizontal adjustment action, ensuring that the downward pressure can be stably transmitted to the sealing cover side plate and the push plate assembly to achieve radial clamping, while avoiding the shearing damage force on the horizontal adjusting screw caused by vertical downward pressing. At the same time, the adjusting fixing plate and the sealing cover side plate together clamp and limit the two ends of the pressure rod, so that the cylinder mounting plate passing through the middle is still constrained by the rigid frame in the horizontal direction, the structure is stable and does not wobble, thus ensuring that the two actions of horizontal adjustment and vertical clamping do not interfere with each other.

[0016] The invention is further configured such that: the second adjustment mechanism includes a mounting plate, a threaded guide rod, a pressure plate cylinder mounting plate, a U-shaped locking block, and a limit adjustment nut; the mounting plate is fixed to the machine body, and mounting ear plates extending upward and fixed to the machine body are provided on both sides of the mounting plate; the pressure plate cylinder mounting plate is arranged parallel to the bottom of the mounting plate; the pressure plate cylinder is fixed to the lower end face of the pressure plate cylinder mounting plate; the threaded guide rod passes vertically through the mounting plate, and its lower end is fixedly connected to the pressure plate cylinder mounting plate; the U-shaped locking block is sleeved on the threaded guide rod and abuts against the upper end face of the mounting plate; the limit adjustment nut is threadedly connected to the threaded guide rod and is located above the U-shaped locking block.

[0017] Using the above technical solution, the mounting plate serves as a fixed, immovable reference. When the upper limit adjusting nut is tightened, the U-shaped locking block and the upper surface of the mounting plate create an upward obstruction. Tightening or loosening the limit adjusting nut forces the threaded guide rod to move vertically, thereby driving the pressure plate cylinder mounting plate and pressure plate cylinder connected to the lower end of the threaded guide rod to rise and fall as a whole, achieving rapid coarse adjustment of the pressure plate cylinder's downward pressure height. After the height is adjusted to the correct position, the U-shaped locking block is tightened. The clamping force generated between the U-shaped locking block and the upper surface of the mounting plate and the threaded guide rod firmly fixes the threaded guide rod at the current height, completely eliminating the potential for height misalignment under long-term high-frequency vibration of the equipment. Subsequently, the pressure plate cylinder drives the pressure plate to press vertically downward, smoothly transmitting the downward pressure to the push plate assembly through the pressure rod and the sealing cover side plate, indirectly forming a radial pressure limit on the filter cartridge. This structure uses a fixed mounting plate on the machine body as a reference, and drives the main cylinder to move up and down through a suspended screw lifting mechanism. It eliminates the need for redundant sliding pairs and horizontal adjustment components, resulting in a simplified and compact structure, intuitive height adjustment, and stable and reliable locking. This effectively improves the adaptability and detection accuracy of multi-station leak testing equipment for filter cartridges of different specifications.

[0018] The present invention is further configured such that: the air intake assembly includes an air intake connector disposed on the contact sealing seat, the contact sealing seat is provided with an air intake port, the air intake connector is connected to the air intake port, and the contact sealing seat is provided with a rubber sealing ring.

[0019] Using the above technical solution, an external detection air source is connected through an air inlet connector and guided to the sealed filter cartridge via the air inlet, thus pressurizing the filter cartridge. After the two ends of the filter cartridge are clamped, the rubber sealing ring adheres to the end face of the filter cartridge to form an annular sealing surface, sealing the end face gap and preventing air pressure leakage during inflation. This ensures stable internal pressure of the filter cartridge and meets the pressure detection conditions for immersion leak testing. The integrated air inlet structure has a compact layout, unobstructed air path, and fast inflation response. The flexible rubber sealing ring fits the end face of the filter cartridge, providing good sealing effect and durability. The simple and stable structure ensures high consistency in multi-station synchronous inflation, effectively guaranteeing the accuracy of leak detection pressure and avoiding misjudgments caused by air leakage.

[0020] The present invention is further configured such that: the water inlet assembly includes a water pump located on the top of the machine body and a water inlet hole located in the water tank, the water inlet hole being connected to the water pump via a water inlet pipe.

[0021] Using the above technical solution, a water pump serves as the power source for water supply, delivering water to the inlet hole at the bottom of the tank via an inlet pipe, thus achieving automatic water filling. After filling, the tank stores water to create an immersion testing environment, ensuring the sealed and pressurized filter cartridge is completely submerged. The presence of leaks is determined by observing the overflow of air bubbles. After testing, the water pump drains the water again to circulate or empty the tank. The automated water filling structure eliminates the need for manual water addition, making operation convenient and efficient. The bottom inlet method ensures a stable water flow, preventing disturbance to the filter cartridge's posture and guaranteeing a stable testing environment. Water recycling is energy-saving and environmentally friendly, and it is suitable for batch continuous testing operations.

[0022] The present invention is further configured such that the sealing cover includes a mounting base connected to a piston rod and a rubber cover body connected to the mounting base.

[0023] Using the above technical solution, the sealing cap is rigidly fixed to the piston rod via the mounting base, ensuring connection strength and alignment accuracy. The rubber cap, as the flexible sealing body, extends with the piston rod to fit against the filter cartridge end face. It relies on its own deformation to fill the gap at the end face, achieving a flexible seal at the filter cartridge port. This, combined with the opposing sealing seat, completes the airtight sealing of both ends of the filter cartridge. The rigid mounting base ensures alignment accuracy, while the flexible rubber cap ensures sealing performance. This combination of rigidity and flexibility ensures precise alignment without easily damaging the filter cartridge end face. The rubber cap is removable and replaceable, resulting in low maintenance costs. It provides good sealing consistency across multiple positions and strong sealing stability, offering a reliable sealing foundation for accurate leak detection.

[0024] The beneficial effects of this invention are: Compared to existing technologies, this invention features multiple synchronous testing stations, enabling simultaneous leak testing of multiple filters. This effectively solves the problem of low testing efficiency in traditional single-station equipment, significantly increasing batch testing capacity and adapting to the needs of continuous industrial production. The invention is equipped with a multi-dimensional adaptive adjustment structure, allowing for flexible fine-tuning of the filter cartridge placement and station clamping distance. This adapts to the testing of filters of different lengths and outer diameters, resulting in strong equipment versatility. Furthermore, the simultaneous and precise distance adjustment across multiple stations simplifies equipment changeover and debugging processes, significantly reducing production debugging costs and equipment investment costs.

[0025] Meanwhile, this invention employs a dual-protection structure combining axial sealing and radial downward pressure limiting, effectively preventing problems such as floating, shifting, and loosening of seals during filter cartridge inflation. This eliminates false positives and missed detections of leaks, significantly improving the equipment's leak detection accuracy and stability. The equipment innovatively adopts a structural design that separates horizontal adjustment and vertical downward pressure forces, ensuring that each action does not interfere with the others. This effectively protects precision transmission and adjustment components, reduces equipment wear, and, combined with a multi-locking structure, avoids reference offset issues caused by long-term operational vibration. The equipment operates stably, has a low failure rate, and a long service life.

[0026] Furthermore, this invention integrates automated water injection, clamping, and inflation detection structures, offering a high degree of automation, convenient operation, and reduced human error. The equipment adopts a modular, detachable assembly structure, facilitating the easy replacement of vulnerable parts and reducing maintenance costs. Unified multi-station operating parameters and precise alignment ensure good consistency in testing conditions across all stations, resulting in reliable batch testing data. This facilitates standardized quality control of filter products for enterprises, demonstrating significant practicality and promotional value.

[0027] The embodiments of the present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a structural diagram of the adjustment component in this invention.

[0029] The following are the labeling elements in the figure: 10-Body; 20-Water tank; 30-Water inlet assembly; 31-Water pump; 40-Placement seat; 41-Placement slot; 50-Adjustment assembly; 51-Fixing plate; 52-Adjustment plate; 53-Mounting plate; 54-Side plate; 55-Guide rod; 56-Threaded adjustment sleeve; 57-Upper adjustment plate; 58-Top plate; 59-Screw; 60-Handle; 70-Abutment sealing seat; 71-Rubber sealing ring; 80-Air inlet assembly; 81-Air inlet connector; 82-Air inlet; 90-Push plate assembly; 91-Push plate cylinder; 92-Piston rod; 93-Cylinder mounting plate; 94-Sealing cover side plate; 95-Guide seat; 96-Sealer 97-Mounting base; 98-Rubber cover; 200-Adjusting mechanism; 201-Servo motor; 202-Motor mounting base; 203-Main gear; 204-Driven gear; 205-Chain; 206-Adjusting screw; 207-Adjusting fixing plate; 300-Pressing assembly; 301-Pressure rod; 302-Pressure plate; 303-Pressure plate cylinder; 304-Pressure plate cylinder shaft; 305-Pressure plate cylinder mounting plate; 306-Mounting step; 400-Second adjusting mechanism; 401-Mounting plate; 402-Mounting ear plate; 403-Threaded guide rod; 404-U-shaped locking block; 405-Limit adjusting nut. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1-4 As shown, this embodiment is a multi-station push-plate filter leak tester, mainly used for immersion-type airtightness leak testing of various cartridge filters. It can realize multi-station synchronous testing and is adaptable to batch testing of filters of different lengths and outer diameters. The equipment includes a body 10, on which a water tank 20 is fixedly installed. The water tank 20 is a hollow cavity structure with an open top, serving as the core working cavity for filter immersion leak testing. A water inlet assembly 30 is installed at the bottom of the water tank 20, enabling automated water filling and replenishment. At least two placement seats 40 are evenly distributed inside the water tank 20. In this embodiment, six sets of placement seats 40 are preferably set to form a six-station synchronous testing structure. Each set of placement seats 40 independently corresponds to one filter cartridge to be tested, greatly improving the efficiency of batch testing.

[0032] The water tank 20 is equipped with an adjustment component 50 for independent fine-tuning of the vertical height and axial horizontal position of each set of placement seats 40, adapting to the placement and support requirements of filter cartridges of different shapes and sizes. A contact sealing seat 70 corresponding to each placement seat 40 is fixedly installed on the inner wall of one end of the water tank 20. Each contact sealing seat 70 integrates an air inlet component 80, which can introduce a constant detection air pressure into the sealed filter cartridge. Multiple sets of push plate assemblies 90 are correspondingly arranged on the end of the machine body 10 away from the contact sealing seats 70. Each push plate assembly 90 matches one of the placement seats 40, and each push plate assembly 90 is equipped with a sealing cap 96 for sealing the end face of the filter cartridge. The machine body 10 is equipped with an adjustment mechanism 200, which can realize the synchronous and equal adjustment of the horizontal spacing of multiple push plate assemblies 90 to adapt to the clamping requirements of filter cartridges of different lengths; at the same time, a pressing component 300 is set above the push plate assembly 90 to apply a constant downward pressure to the push plate assembly 90, so as to prevent the filter cartridge from floating or shifting after being inflated, and to ensure the stability of the test.

[0033] During overall equipment operation, water is injected into the water tank 20 through the water inlet component 30 to form an immersion testing water environment. The filter cartridge to be tested is placed horizontally on each set of placement seats 40. After the filter cartridge is accurately aligned by the adjustment component 50, the push plate component 90 is activated, causing the sealing cover 96 to engage with the opposite sealing seat 70 to achieve axial clamping and sealing at both ends of the filter cartridge. Subsequently, compressed air at a preset pressure is introduced into the filter cartridge through the air inlet component 80, and the pressure-down component 300 simultaneously presses down to limit the movement of the filter cartridge. After the filter cartridge is completely submerged in the water in the water tank 20, the presence of air leakage defects in the filter is determined by observing the overflow of air bubbles on the surface of the filter cartridge, thus completing the multi-station synchronous leak detection operation.

[0034] Specifically, the adjustment assembly 50 includes a fixed plate 51, an adjustment plate 52, a mounting plate 53, guide rods 55, threaded adjustment sleeves 56, an upper adjustment plate 57, a top plate 58, and a screw 59. The mounting plate 53 is rigidly fixed to the inner wall of the water tank 20 via vertically arranged side plates 54 on both sides, forming a fixed reference base for the entire adjustment assembly 50, ensuring strong structural rigidity and stable operation. The adjustment plate 52 is arranged parallel to the mounting plate 53. Guide rods 55 are vertically fixed on both sides of the adjustment plate 52, penetrating the adjustment plate 52 vertically. Threaded adjustment sleeves 56 are threaded onto the guide rods 55. The adjustment plate 52 is fixedly connected to the threaded adjustment sleeves 56. By rotating the threaded adjustment sleeves 56, the adjustment plate 52 can be vertically raised and lowered along the guide rods 55, precisely adjusting the vertical support height of the placement seat 40 to adapt to the support requirements of filter cartridges with different outer diameters.

[0035] An upper adjusting plate 57 is fixedly mounted above the adjusting plate 52. Both ends of the upper adjusting plate 57 are fixedly connected to the upper ends of the guide rod 55. The top ends of the guide rod 55 together fix the top plate 58, forming an integrated fixed frame with the top plate 58, the upper adjusting plate 57, and the guide rod 55, ensuring structural stability. A screw 59 is vertically inserted through the center of the top plate 58. The screw 59 can rotate up and down along the top plate 58. The lower end of the screw 59 passes through the upper adjusting plate 57 and can abut against the upper surface of the fixed plate 51. A manual handle 60 is fixedly mounted on the top end of the screw 59. During actual adjustment, loosening handle 60 causes screw 59 to move upward, disengaging the lower end of screw 59 from the locking state of fixed plate 51. This allows manual pushing and pulling of fixed plate 51 to finely adjust the front-to-back alignment of the placement seat 40 along the filter cartridge axis, adapting to the axial positioning requirements of filter cartridges of different lengths. After the position is adjusted, rotating handle 60 causes screw 59 to move downward, tightly pressing the lower end of screw 59 against fixed plate 51, achieving locking and positioning of fixed plate 51 and preventing displacement during testing. This structure allows for bidirectional independent adjustment of the vertical height and axial horizontal position of the placement seat 40, offering high adjustment accuracy, good locking stability, and excellent consistency in multi-station synchronous adjustment.

[0036] Furthermore, the top of the placement seat 40 is provided with an arc-shaped placement groove 41 that matches the outer circumference of the filter cartridge. The filter cartridge to be tested is laterally secured inside the placement groove 41. The placement groove 41 provides omnidirectional positioning of the filter cartridge, effectively preventing it from rolling or shifting during testing and ensuring uniform placement and precise alignment of the filter cartridges at each station. Simultaneously, the placement seat 40 is detachably fixed to the fixing plate 51 using fastening screws, allowing for convenient assembly and disassembly. Different groove types of placement seats 40 can be quickly replaced according to the outer diameter specifications of the filter cartridge, broadening the equipment's compatibility and reducing subsequent maintenance and replacement costs.

[0037] The pusher assembly 90 includes a pusher cylinder 91, a piston rod 92, a cylinder mounting plate 93, a guide seat 95, and a sealing cover 96. The cylinder mounting plate 93 is fixed vertically at the end of the machine body 10 away from the sealing seat 70. Multiple pusher cylinders 91 are evenly fixed on the cylinder mounting plate 93, providing stable power output for the filter cartridge clamping and sealing. The end of the water tank 20 that is fitted with the sealing seat 70 is a sealing cover side plate 94. A guide seat 95 matching the piston rod 92 is fixedly fitted inside the sealing cover side plate 94. A wear-resistant guide sleeve is provided inside the guide seat 95. One end of the piston rod 92 is fixedly connected to the telescopic end of the pusher cylinder 91, and the other end horizontally passes through the guide seat 95 and extends above the water tank 20, with its end fixedly connected to the sealing cover 96. During operation, the pusher cylinder 91 drives the piston rod 92 to extend and retract horizontally. The guide seat 95 provides radial limiting guidance for the piston rod 92, completely preventing wobbling and eccentricity during extension and retraction, and ensuring precise vertical alignment between the sealing cover 96 and the filter cartridge end face. When the piston rod 92 extends, it causes the sealing cover 96 to fit against the outer end face of the filter cartridge, cooperating with the opposing sealing seat 70 to clamp the filter cartridge, achieving axial sealing at both ends of the filter cartridge. After the inspection is completed, the piston rod 92 retracts, releasing the filter cartridge to complete the workpiece unloading and reset. The process is highly automated and provides uniform and stable clamping force.

[0038] The sealing cap 96 includes a rigid mounting base 97 and a flexible rubber cover 98. The mounting base 97 is rigidly fixed to the end of the piston rod 92 to ensure connection strength and alignment accuracy. The rubber cover 98 is fixed inside the mounting base 97 and directly contacts and fits against the end face of the filter cartridge. Through the combination of rigidity and flexibility, the sealing alignment accuracy is ensured, and the gaps in the end face of the filter cartridge can be filled by the deformation of the rubber cover 98 itself, achieving a gapless seal, while avoiding rigid compression that could damage the end face of the filter cartridge.

[0039] The adjustment mechanism 200 is used to synchronously adjust the horizontal spacing of multiple push plate assemblies 90, and specifically includes a servo motor 201, an adjustment gear, an adjustment screw 206, and a motor mounting base 202. The motor mounting base 202 is fixedly mounted on the outside of the cylinder mounting plate 93, and the servo motor 201 is vertically fixed on the motor mounting base 202; the adjustment gear consists of a main gear 203 and at least two driven gears 204, the main gear 203 is fixedly connected to the output shaft of the servo motor 201, and each driven gear 204 is rigidly fixed to the corresponding adjustment screw 206. An adjustment fixing plate 207 parallel to the cylinder mounting plate 93 is fixed at the upper end of the body 10. The adjustment screw 206 passes horizontally through the cylinder mounting plate 93 and forms a threaded engagement. The two ends of the adjustment screw 206 are respectively supported by bearings on the adjustment fixing plate 207 and the sealing cover side plate 94 to achieve stable rotational support of the adjustment screw. All driven gears 204 are connected to the main gear 203 through closed-loop chain 205 to form a synchronous transmission structure.

[0040] During actual changeover adjustments, the servo motor 201 is activated, driving the main gear 203 to rotate. This, in turn, drives all driven gears 204 and adjusting screws 206 to rotate synchronously in the same direction via the chain 205. Through the threaded transmission between the adjusting screw 206 and the cylinder mounting plate 93, the rotational motion of the adjusting screw 206 is converted into the horizontal linear motion of the cylinder mounting plate 93. This synchronously and equally adjusts the clamping distance between multiple sets of push plate assemblies 90 and the contact sealing seat 70, precisely adapting to the clamping requirements of filter cartridges of different lengths. After adjustment, the servo motor 201 locks, fixing the station spacing. This completely solves the problems of inconsistent station spacing, cumbersome debugging, and poor consistency caused by traditional single-station independent adjustment, significantly improving the efficiency of equipment changeover adjustments and the consistency of multi-station operations.

[0041] The pressing assembly 300 is configured to apply a radial pressing force to the push plate assembly 90 and the filter cartridge, so as to prevent the filter cartridge from floating and shifting when inflated. Specifically, the pressing assembly 300 comprises a pressing rod 301, a pressing plate 302, a pressing plate cylinder 303, a pressing plate cylinder shaft 304 and a second adjusting mechanism 400. A vertical through hole is opened on the cylinder mounting plate 93 at a position corresponding to the pressing rod 301. A plurality of pressing rods 301 are vertically and correspondingly arranged through the through holes. The pressing rods 301 are not rigidly connected to the cylinder mounting plate 93 and can slide freely relative to each other; the lower end of the pressing rod 301 is rigidly fixed to the sealing cover side plate 94, and the upper end thereof vertically penetrates through the adjusting fixing plate 207, so as to realize stable limiting of both ends of the pressing rod 301. The bottom of the sealing cover side plate 94 is provided with a mounting step 306. The mounting step 306 is arranged to fit the end face of the machine body 10 and can slide vertically up and down along the end face of the machine body 10, so as to provide a displacement space for the pressing action. The top ends of all the pressing rods 301 are fixedly connected to the pressing plate 302 together. A pressing plate cylinder mounting plate 305 is fixedly assembled above the machine body 10. The pressing plate cylinder 303 is vertically fixed on the pressing plate cylinder mounting plate 305. The lower end of the pressing plate cylinder shaft 304 is fixedly connected to the center of the pressing plate 302. The pressing plate cylinder 303 drives the pressing plate 302 and the pressing rods 301 to integrally ascend and descend vertically, so as to drive the sealing cover side plate 94 to press down, thereby forming radial pressing and limiting on the filter cartridge in the clamped state, effectively counteracting the floating stress generated by the inflation and expansion of the filter cartridge, and ensuring the stability of the sealing state.

[0042] The second adjusting mechanism 400 matched with the pressing assembly 300 is used for finely adjusting the pressing height of the pressing plate cylinder 303 to adapt to the pressing requirements of filter cartridges of different specifications, and specifically comprises a mounting flat plate 401, a threaded guide rod 403, a U-shaped locking clamping block 404 and a limiting adjusting nut 405. The mounting flat plate 401 is horizontally fixed at the upper end of the machine body 10. Mounting lugs 402 are arranged on both sides of the mounting flat plate 401. The mounting lugs 402 are rigidly fixed to the machine body 10 to form a fixed reference. The pressing plate cylinder mounting plate 305 is arranged in parallel below the mounting flat plate 401, and the pressing plate cylinder 303 is fixed on the lower end face of the pressing plate cylinder mounting plate 305; the threaded guide rod 403 vertically penetrates through the mounting flat plate 401, the lower end of the threaded guide rod 403 is fixedly connected with the pressing plate cylinder mounting plate 305, and the upper end thereof extends above the mounting flat plate 401. The U-shaped locking clamping block 404 is sleeved outside the threaded guide rod 403 and fits the upper end face of the mounting flat plate 401. The limiting adjusting nut 405 is threadedly assembled on the upper end of the threaded guide rod 403 and located above the U-shaped locking clamping block 404.

[0043] During height adjustment, loosening the limit adjustment nut 405 allows manual vertical movement of the threaded guide rod 403, simultaneously adjusting the overall height of the pressure plate cylinder 303 and the pressure plate 302 to achieve coarse adjustment of the downward stroke. After adjusting to the appropriate height, tighten the limit adjustment nut 405. At the same time, the U-shaped locking block 404 has a locking gap along the radial or open direction, with a clamping bolt (or set screw) inserted through this gap. By tightening this clamping bolt, the operator forces the clamping wings at both ends of the U-shaped locking block 404 to contract towards the center, generating a centripetal pre-tightening clamping force within its inner ring. This tightly locks and secures the threaded guide rod 403 inside, completely fixing the height position and eliminating the height reference deviation caused by long-term high-frequency vibration of the equipment, ensuring stable and consistent downward pressure. This structure completely separates the force of the horizontal spacing adjustment from the vertical downward pressing action, ensuring that the two actions do not interfere with each other, significantly improving the stability of equipment operation.

[0044] The air intake assembly 80 is integrated into the contact sealing seat 70, including an air intake connector 81 and a rubber sealing ring 71. An air intake port 82 is located at the center of the contact sealing seat 70. The air intake connector 81 is fixedly mounted on the outside of the air intake port 82 and communicates with it. An external detection air source is connected through the air intake connector 81, allowing for a stable supply of detection air pressure into the sealed filter cartridge. An annular rubber sealing ring 71 is embedded at the position where the contact sealing seat 70 contacts the end face of the filter cartridge. After the filter cartridge is clamped and sealed at both ends, the rubber sealing ring 71 tightly fits the end face of the filter cartridge, sealing the end face assembly gap and effectively preventing air pressure leakage during inflation. This ensures a constant detection pressure inside the filter cartridge and avoids misjudgments due to air leakage. Multi-station independent air intake and synchronous inflation result in high consistency of air pressure output and stable leak detection accuracy.

[0045] The water inlet assembly 30 includes a water pump 31 and water inlet holes. The water pump 31 is fixedly mounted on the top outer side of the machine body 10. Multiple water inlet holes are evenly distributed at the bottom of the water tank 20. The water inlet holes are connected to the outlet end of the water pump 31 through water inlet pipes. When the equipment is in operation, the water pump 31 is started, and water is automatically injected into the water tank 20 through the water inlet pipes and water inlet holes. The bottom water inlet method ensures a stable water flow and does not disturb the placement of the filter cartridges on the workstation, thus ensuring a stable testing water environment. After the water injection reaches the standard, the water pump 31 is turned off, allowing the filter cartridges to be completely submerged in the water for leak testing. After the test is completed, the water can be drained or recycled through the water pump 31 in conjunction with the drainage pipe. The system is highly automated, energy-saving and environmentally friendly, and suitable for batch continuous testing operations.

[0046] The invention also includes an electrical control system comprising a PLC (Programmable Logic Controller). The control outputs of the PLC are electrically connected to the water pump 31 of the water inlet assembly 30, the pusher cylinder 91 of the pusher assembly 90, the pressure cylinder 303 of the pressing assembly 300, the servo motor 201 of the adjusting mechanism 200, and the air circuit control solenoid valve of the air inlet assembly 80. The timing, travel distance, and pressure control of all actuators are automatically and collaboratively controlled by the PLC according to a preset filter cartridge leak detection program, thereby achieving fully automatic multi-station synchronous leak detection operation.

[0047] The workflow of this invention is as follows: First, based on the specifications and dimensions of the filter cartridge to be tested, the vertical height and axial position of each set of placement seats 40 are finely adjusted by adjusting component 50. Simultaneously, the horizontal clamping spacing of multiple sets of push plate components 90 is adjusted synchronously by adjusting mechanism 200 to complete equipment changeover debugging. Then, the filter cartridge to be tested is placed horizontally one by one into the placement slots 41 of each set of placement seats 40 to achieve precise positioning. The equipment is started, and the PLC controller controls the push plate components 90 to move according to a preset program. The sealing cover 96 and the contact sealing seat 70 cooperate to clamp both ends of the filter cartridge, completing axial sealing. After the operator (or the PLC is set according to the outer diameter) adjusts the pressing height of the pressing component 300 through the second adjusting mechanism 400, the PLC controller controls the pressing plate cylinder 303 to move to achieve radial pressing and limiting. The PLC controller starts the water pump 31 to inject water into the water tank 20. After the filter cartridge is completely submerged, the PLC controller controls the air intake component 80 to introduce a constant detection air pressure into the filter cartridge. The water tank 20 is then left to stand for observation. Check for air bubbles on the surface of the inner filter cartridge to determine if there is a leakage defect. After the test is completed, the PLC controller controls the depressurization, drainage, and reset of each component in sequence to complete a single multi-station leak test and repeat the cycle to achieve batch testing.

[0048] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A multi-station push-plate filter leak tester, characterized in that: The system includes an organism (10), a water tank (20) on the organism (10), a water inlet assembly (30) at the bottom of the water tank (20) for water to enter the water tank (20), at least two placement seats (40) for placing filter cartridges inside the water tank (20), an adjustment assembly (50) for adjusting the position of the placement seats (40) inside the water tank (20), and at least two abutment sealing seats (70) on the inner side wall of one end of the water tank (20) corresponding to the placement seats (40). The sealing seat (70) is provided with an air intake assembly (80) for the filter cartridge to enter the air. The body (10) is also provided with at least two push plate assemblies (90) corresponding to the placement seat (40). Each push plate assembly (90) is provided with a sealing cover (96) for sealing the filter cartridge. The body (10) is provided with an adjustment mechanism (200) for adjusting the horizontal position of the push plate assembly (90). A pressing assembly (300) for pressing down the push plate assembly (90) is provided above the push plate assembly (90).

2. The multi-station push-plate filter leak tester according to claim 1, characterized in that: The adjustment assembly (50) includes a fixed plate (51) with a fixed placement base (40), an adjustment plate (52) located below both sides of the fixed plate (51), and a mounting plate (53) located below the adjustment plate (52) and parallel to the adjustment plate (52). The mounting plate (53) is fixed to the side wall of the water tank (20) via a side plate (54). Guide rods (55) are vertically arranged on both sides of the adjustment plate (52), and threaded adjustment sleeves (56) are provided on the guide rods (55). The plate (52) is connected to the threaded adjusting sleeve (56); an upper adjusting plate (57) is provided above the adjusting plate (52), and a top plate (58) is provided above the upper adjusting plate (57). The top plate (58) and the upper adjusting plate (57) are respectively fixedly connected to the upper end of the guide rod (55); a screw (59) is provided on the top plate (58), and the lower end of the screw (59) passes through the upper adjusting plate (57) and can abut against the fixing plate (51). A handle (60) is provided on the upper end of the screw (59).

3. A multi-station push-plate filter leak tester according to claim 2, characterized in that: The placement seat (40) is provided with a placement groove (41), and the placement seat (40) is fixed to the fixing plate (51) by screws.

4. A multi-station pusher plate filter leak tester according to claim 1, 2, or 3, characterized in that: The push plate assembly (90) includes a push plate cylinder (91) and a piston rod (92) connected to the push plate cylinder (91). The machine body (10) has a cylinder mounting plate (93) on the other end of the water tank (20). The push plate cylinder (91) is mounted on the cylinder mounting plate (93). The water tank (20) has a sealing cover side plate (94) on the other end of the sealing cover side plate (94). The sealing cover side plate (94) has a guide seat (95). One end of the piston rod (92) is connected to the push plate cylinder (91), and the other end passes through the guide seat (95) and is placed above the water tank (20) and connected to the sealing cover (96).

5. A multi-station pusher plate filter leak tester according to claim 4, characterized in that: The adjustment mechanism (200) includes a servo motor (201), an adjustment gear, and an adjustment screw (206). A motor mounting base (202) is provided on the cylinder mounting plate (93). The servo motor (201) is fixed to the motor mounting base (202). The adjustment gear includes a main gear (203) connected to the servo motor (201) and at least two driven gears (204). The other end of the machine body (10) with a water tank (20) is equipped with a mechanism connected to the cylinder. The mounting plate (93) is parallel to the adjusting fixing plate (207); the adjusting screw (206) passes through the cylinder mounting plate (93) and forms a threaded engagement with the cylinder mounting plate (93); one end of the adjusting screw (206) is rotatably supported on the adjusting fixing plate (207), and the other end is rotatably supported on the sealing cover side plate (94); the driven gear (204) is fixedly connected to the adjusting screw (206), and the driven gear (204) is connected to the main gear (203) through the chain (205).

6. A multi-station pusher plate filter leak tester according to claim 4, characterized in that: The pressing assembly (300) includes at least two pressure rods (301), a pressure plate (302), a pressure plate cylinder (303), and a pressure plate cylinder shaft (304). The cylinder mounting plate (93) has a through hole for the pressure rods (301) to pass through. One end of the pressure rod (301) is rigidly fixed to the sealing cover side plate (94), and the other end passes through the adjusting and fixing plate (207). The sealing cover side plate (94) has an installation step (306), which abuts against the machine body (10) and seals the surface. The cover side plate (94) can move vertically along the body (10); the pressure plate (302) is located above the pressure rod (301) and is fixedly connected to the pressure rod (301); the body (10) is provided with a pressure plate cylinder mounting plate (305); the pressure plate cylinder (303) is fixed on the pressure plate cylinder mounting plate (305); one end of the pressure plate cylinder shaft (304) is connected to the pressure plate cylinder (303), and the other end is connected to the pressure plate (302); the pressure plate cylinder (303) is also provided with a second adjustment mechanism (400) for adjusting the position of the pressure plate cylinder (303).

7. A multi-station pusher plate filter leak tester according to claim 6, characterized in that: The second adjustment mechanism (400) includes a mounting plate (401), a threaded guide rod (403), a pressure plate cylinder mounting plate (305), a U-shaped locking block (404), and a limit adjustment nut (405); the mounting plate (401) is fixed on the machine body (10), and mounting ear plates (402) extending upward and fixed to the machine body (10) are provided on both sides of the mounting plate (401); the pressure plate cylinder mounting plate (305) is arranged parallel to the bottom of the mounting plate (401); The pressure plate cylinder (303) is fixed to the lower end face of the pressure plate cylinder mounting plate (305); the threaded guide rod (403) passes vertically through the mounting plate (401), and its lower end is fixedly connected to the pressure plate cylinder mounting plate (305); the U-shaped locking block (404) is sleeved on the threaded guide rod (403) and abuts against the upper end face of the mounting plate (401); the limit adjusting nut (405) is threadedly connected to the threaded guide rod (403) and is located above the U-shaped locking block (404).

8. A multi-station pusher plate filter leak tester according to claim 1, 2, or 3, characterized in that: The air intake assembly (80) includes an air intake connector (81) disposed on the contact sealing seat (70), an air inlet (82) is provided on the contact sealing seat (70), the air intake connector (81) is connected to the air inlet (82), and a rubber sealing ring (71) is provided on the contact sealing seat (70).

9. A multi-station pusher plate filter leak tester according to claim 1, 2, or 3, characterized in that: The water inlet assembly (30) includes a water pump (31) located on the top of the body (10) and a water inlet hole located in the water tank (20). The water inlet hole is connected to the water pump (31) through a water inlet pipe.

10. A multi-station pusher plate filter leak tester according to claim 1, 2, or 3, characterized in that: The sealing cap (96) includes a mounting base (97) connected to the piston rod (92) and a rubber cap (98) connected to the mounting base (97).

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