Filter double position leak detection equipment

Abstract

The present application relates to filter double position leak detection equipment, through setting two leak detection positions and automatic sequencing feeding mechanism and filter discharging mechanism cooperation to realize double position processing, avoid waiting, improve processing efficiency, through changing the original transfer clamp plate upper semicircular clamp opening to first V-shaped clamp opening, so that the first V-shaped clamp opening can clamp different specifications of filter with the same clamp plate, so that it does not need to frequently change main and auxiliary clamps, greatly improves the adaptability of the clamp plate, the turnover mechanism can fully expose the leakage point of the filter in water, turns the original leakage point below the filter to the upper side, so that the detection is more accurate, avoids misjudgment, and avoids scratching the mounting screw hole by setting the buffer space.

Description

Technical Field

[0001] This invention relates to the field of filter testing, and particularly to a dual-station leak detection device for filters. Background Technology

[0002] Air filters are a crucial component of engines, their performance determining not only engine reliability and lifespan but also significantly impacting power, fuel economy, and emissions. The airtightness of the air filter directly affects the quality of motor vehicles, making pressure regulation and leak detection of automotive filters a vital technical area.

[0003] Existing filters include a housing and a cover plate. A cavity is provided between the housing and the cover plate, and a paper core is placed inside the cavity. The cover plate has an oil inlet (outlet), and the bottom of the housing has an oil outlet (inlet). The housing and the cover plate are fixedly connected by screws or by a double-layered seam at their joint to ensure the connection strength and sealing performance between the filter cover and the housing. The filter has mounting screw holes in the center for installation on automobiles. The airtightness test of the filter is generally carried out by immersion method, that is, the product filter is first fixed, then the fixed filter is immersed in water, and then gas is injected into the product filter. The airtightness of the filter is determined by observing the bubbles on the water surface.

[0004] Chinese patent application number CN201910767651.6 discloses an automatic filter testing device, which includes a feeding mechanism at the front end of the frame, a flipping mechanism arranged parallel to the feeding mechanism, a discharging mechanism arranged between the flipping mechanism and the feeding mechanism, a water tank mechanism arranged at the lower end of the flipping mechanism and capable of being raised and lowered, and a filter clamping and feeding mechanism arranged at the upper end of the frame. The filter clamping and feeding mechanism has a clamping position for clamping the filter located on the feeding mechanism, a discharging position for placing the clamped filter on the discharging mechanism, and a loading and unloading position for installing the clamped filter on the flipping mechanism. By using the filter clamping and feeding mechanism, the filter can be installed on the flipping mechanism from the feeding mechanism. After being flipped 180 degrees by the flipping mechanism, the air tightness is tested. Moreover, the tested filter can also be moved from the flipping mechanism to the discharging mechanism, realizing fully automatic air tightness testing of the filter. At the same time, it can greatly improve the testing efficiency and significantly reduce labor costs.

[0005] However, the filter testing equipment described above still has the following drawbacks in actual use:

[0006] 1. In this technical solution, when the filter is tested for air tightness, the filter clamping and feeding mechanism installs the filter on the flipping mechanism from the feeding mechanism. After the filter is flipped 180 degrees by the flipping mechanism, the air tightness test is performed. The filter that has been tested on the flipping mechanism can also be moved to the discharge mechanism for discharge. This structure means that the testing equipment can only test the next set of filters after the previous set of filters has been tested, resulting in low efficiency.

[0007] 2. When testing filters, they are all placed in still water. If the leak point is at the bottom, it will be difficult to detect the bubbles in the water, leading to missed inspections of defective products. In addition, the filter in this technical solution uses a threaded connector to connect to the filter. However, during the connection process between the automatic feeding component and the clamping component, the clamping component will press down on the filter and cause it to abut against the connector on the automatic feeding component. Furthermore, the automatic filter testing equipment tests multiple filters simultaneously. Since the end face of the mounting screw hole of the filter must have a screw head for screwing in, if one connector does not correspond to the screw head of the mounting screw hole, the other filters will be locked and then rotated. This will cause the mismatched filter head to rotate excessively against the connector, damaging the mounting screw hole of the filter and making it difficult to install on the car later.

[0008] 3. In this technical solution, the filter clamping position is composed of two semicircles forming a circular clamping position. This circular clamping position can only clamp a filter of one specification. For example, when the clamping position is suitable for clamping a filter with a diameter of 60cm, if it is used to clamp a filter with a diameter of 70cm, the contact surface between the clamping position and the filter will change from surface contact to point contact, resulting in unstable clamping. Furthermore, the clamped filter will be transferred to the flipping clamping device, causing the filter clamped in the clamping position to be pressed down. If the clamping is unstable, the product will move upwards due to the force and detach from the clamping position. Therefore, the filter clamping mechanism needs to frequently change the clamps when clamping filters of different specifications and sizes. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a dual-station leak detection device for filters, which addresses the shortcomings of the prior art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a dual-station leak testing device for filters, comprising a frame, an automatic sorting and feeding mechanism arranged parallel to one side of the frame, and a filter unloading mechanism, characterized in that: the frame is provided with two leak testing stations for airtightness testing of the filters, each leak testing station is provided with a leak testing water tank, and a visual leak testing mechanism for detecting the water surface state in the leak testing water tank is provided above each leak testing water tank; the frame is provided with a tilting mechanism at the corresponding leak testing station to drive the filter into or out of the leak testing water tank. The system includes a transfer mechanism that drives the filters to circulate sequentially between an automatic sorting and feeding mechanism, a flipping mechanism, and a filter unloading mechanism. The automatic sorting and feeding mechanism includes a feeding conveyor belt and an automatic sorting component that automatically sorts the filters at equal intervals at the feeding conveyor belt. The filter unloading mechanism includes a unloading conveyor belt and a screening mechanism that removes unqualified filters on one side of the unloading conveyor belt. The feeding conveyor belt and the unloading conveyor belt are evenly distributed in front of two leak testing stations and work in conjunction with the transfer mechanism of the corresponding leak testing station.

[0011] By adopting the above technical solution, the original single-operation leak detection structure is transformed into a dual-station leak detection system. This avoids the inefficiency caused by the inability to detect the next set of filters until the previous set has been tested. Specifically, a feeding conveyor and a discharging conveyor are set up in front of two leak detection stations. The filters are sorted in the two leak detection stations by an automatic sorting component. The transfer mechanism in the leak detection station transfers the filters in the automatic sorting component to a turning mechanism for fixation. After the turning mechanism drives the filters to test their airtightness in the leak detection tank, the transfer mechanism sends them to the filter unloading mechanism for automatic unloading. Defective products are automatically rejected by a screening mechanism electrically connected to the visual leak detection mechanism. The automatic sorting component automatically replenishes the filters in the entire automatic sorting component. By setting up two leak detection stations in cooperation with the automatic sorting feeding mechanism and the filter unloading mechanism, dual-station processing is achieved, avoiding waiting and improving processing efficiency.

[0012] The aforementioned dual-station leak testing device for filters can be further configured as follows: the transfer mechanism includes a transfer guide rail mounted above the frame, a transfer frame that moves along the transfer guide rail, a transfer clamping plate mounted on the transfer frame, a transverse drive assembly that drives the transfer frame to move back and forth on the feeding conveyor belt, the flipping mechanism and the unloading conveyor belt, a longitudinal drive assembly that drives the transfer clamping plate to rise and fall along the axial direction of the transfer frame, and a clamping drive assembly that drives the transfer clamping plate to open and close, thereby clamping or releasing the filter.

[0013] Using the above technical solution, the transfer guide rail is fixed above the feeding conveyor belt, the overturning mechanism and the unloading conveyor belt. The transfer clamp is moved back and forth in three positions by the transverse drive component to achieve transfer. The transfer clamp can be driven to rise and fall axially by the longitudinal drive component, thereby controlling the stable transfer of the transfer clamp with the feeding conveyor belt, the overturning mechanism and the unloading conveyor belt.

[0014] The aforementioned dual-station leak detection device for filters can be further configured such that: the transfer clamp includes a main clamp and an auxiliary clamp, both the main clamp and the auxiliary clamp are provided with a plurality of corresponding first V-shaped clamping slots, the corresponding first V-shaped clamping slots between the main clamp and the auxiliary clamp form a quadrilateral clamping position for clamping the filter, and the clamping drive assembly drives the main clamp and the auxiliary clamp to move relative to each other, thereby controlling the opening and closing of the transfer clamp.

[0015] Using the above technical solution, the clamping drive assembly can drive the clamp at one end to move to the other end, or drive the main and auxiliary clamps to move towards each other to achieve clamping. At the same time, by changing the semi-circular clamping opening in the original technical solution to a first V-shaped clamping opening, when clamping a larger filter, the original circular clamping position and the filter abutting method become intersecting, changing from surface contact to point contact, which leads to clamping instability. After changing to the first V-shaped clamping opening, the abutting method with the filter becomes tangential, and its abutting surface still has a large area of ​​surface contact, avoiding the instability and easy tipping caused by the original circular clamping position changing from surface contact to point contact with the filter. In addition, the first V-shaped clamping opening can use the same clamping plate to clamp filters of different specifications, so that it does not need to frequently change the main and auxiliary clamps, greatly improving the adaptability of the clamping plate.

[0016] The aforementioned dual-station leak detection device for filters can be further configured as follows: Each of the adjacent quadrilateral clamping positions is provided with an elastic tensioning mechanism that applies a clamping force to the first V-shaped clamps on the main and auxiliary clamps. The elastic tensioning mechanism includes a tension spring body, with positioning rings at both ends. The main and auxiliary clamps have mounting holes at the corresponding positioning rings to fix the positioning rings onto the main and auxiliary clamps respectively. Both ends of the tension spring body pass through the main and auxiliary clamps respectively and are fixedly connected to them. The main and / or auxiliary clamps have tension locking holes at the corresponding mounting holes, which are perpendicular to the mounting holes. The clamping drive assembly includes open-end clamping cylinders located on both sides of the main and auxiliary clamps. The output ends of the open-end clamping cylinders are connected to the main and auxiliary clamps respectively, driving the main and auxiliary clamps to move in opposite directions.

[0017] Using the above technical solution, the two ends of the tension spring body are respectively set inside the main and auxiliary clamps, and the positioning rings at both ends of the tension spring body are fixed in the main and auxiliary clamps through the mounting holes. The tension spring body causes the main and auxiliary clamps to clamp each other due to the elastic force, which improves the clamping stability. By setting a tension locking hole, after the positioning ring at one end is fixed, the positioning ring at the other end is pulled to the mounting hole through the tension locking hole during installation. After deformation, the positioning ring at the other end causes the main and auxiliary clamps to clamp due to its elastic force. The open clamping cylinder is a cylinder with bidirectional output at both ends. After the cylinder is connected to the main clamp and the auxiliary clamp, it can drive the main clamp and the auxiliary clamp to open or close, thereby completing the clamping and releasing.

[0018] The aforementioned dual-station leak detection device for filters can be further configured as follows: the transverse drive assembly includes transverse synchronous pulleys disposed on both sides of the transfer guide rail, a transverse synchronous belt wound around the transverse synchronous pulleys on both sides, a transverse drive motor disposed on one side of the transfer guide rail to drive one of the transverse synchronous pulleys to rotate, and a transverse fixing block disposed on the transfer frame and connected to the transverse synchronous belt. The transverse drive motor drives the transverse synchronous belt to rotate, thereby driving the transfer frame to move back and forth along the transfer guide rail. The longitudinal drive assembly includes longitudinal synchronous pulleys disposed on both sides of the transfer frame, a longitudinal synchronous belt sleeved between the longitudinal synchronous pulleys, longitudinal lifting plates disposed on both sides of the transfer clamping plate, and a longitudinal drive motor disposed on the transfer frame to drive the longitudinal synchronous pulleys to rotate. A longitudinal drive screw is disposed between the longitudinal synchronous pulleys and the longitudinal lifting plate. A longitudinal threaded sleeve is disposed on the longitudinal lifting plate. One end of the longitudinal drive screw is linked to the longitudinal synchronous pulley, and the other end is threadedly connected to the longitudinal threaded sleeve. The longitudinal drive motor drives the longitudinal synchronous pulleys to rotate, causing the transfer clamping plate to move up and down axially along the longitudinal drive screw.

[0019] Using the above technical solution, the transfer clamp is used to hold the filter and drives the transfer clamp to transfer multiple filters in sequence between the feeding conveyor belt, the turning mechanism and the unloading conveyor belt through the horizontal drive motor and the vertical drive motor, so as to realize automated processing.

[0020] The aforementioned dual-station leak testing device for filters can be further configured as follows: the flipping mechanism includes a mounting frame and a flipping assembly disposed on the side of the mounting frame for driving the mounting frame to flip so that it enters or leaves the leak testing water tank. The mounting frame is provided with at least two filter clamping mechanisms. The filter clamping mechanism includes a fixing block, a mounting sleeve, and a drive rod passing through the mounting sleeve. One end of the drive rod is provided with a locking assembly that locks the filter to be tested onto the fixing block, and the other end is provided with a tensioning power source. The drive rod is provided with an air inlet, and the drive rod is provided with an air inlet channel that connects to the air inlet and supplies air to the filter to be tested that is locked by the locking assembly. The mounting frame is provided with a rotary drive motor. The rotary drive motor drives the filter to be tested on the locking assembly to rotate through the rotary drive assembly. The drive rod, through the tensioning drive source, has a first state in which the filter to be tested, fixed by the locking assembly, is pressed onto the fixing block, and a second state in which the filter to be tested is released from the pressing state between the filter to be tested and the fixing block.

[0021] Using the above technical solution, the flipping mechanism is used to drive the filter on the mounting frame to sink into the water to test its airtightness. By setting multiple filter clamping mechanisms on the mounting frame, multiple filters can be tested simultaneously. The fixing block can be equipped with a sealing ring or tightly abut against the sealing ring of the filter itself. During testing, the locking assembly can be fixed by claws or by threaded connection. After being fixed, the filter will enter the water. The air inlet on the drive rod is connected to an external air source. The air is sent to the filter connected by the threaded joint through the air inlet channel and the buffer connection cavity for airtightness testing. Due to the presence of the mounting sleeve, the buffer connection cavity will not leak in the water. At this time, the rotary drive motor drives the locking assembly to rotate 360° in the water through the rotary drive assembly, so that the filter in the water can fully expose its leakage point, and turn the leakage point from the bottom of the filter to the top, making the detection more accurate and avoiding false detection.

[0022] The aforementioned dual-station leak detection device for filters can be further configured as follows: the rotary drive assembly includes a drive gear located at the output end of a rotary drive motor and a drive gear located outside the mounting sleeve and linked to the drive gear. The drive gear drives the mounting sleeve to rotate, the mounting sleeve drives the drive rod to rotate, and the drive rod is linked to the locking assembly to rotate. The drive gear and the mounting sleeve, as well as the mounting sleeve and the drive rod, are linked by positioning protrusions and positioning slots. The tensioning drive source is a tensioning cylinder, which is fixedly located on the side of the mounting frame away from the fixed block, and its output end is connected to the drive rod, driving the locking assembly to axially extend and retract within the fixed block. The tensioning drive source and the drive rod are connected by a coupling.

[0023] Using the above technical solution, the rotary drive motor drives the drive gear to rotate via the active gear. The drive gear, in conjunction with the mounting sleeve and drive rod, rotates, which in turn causes the locking assembly connected to the drive rod to rotate. When the filter is fixed, the threaded joint rotates to secure the filter to the fixed block, facilitating the assembly and testing of multiple filters. Simultaneously, during airtightness testing, the locking assembly also drives the filter in the water to rotate, ensuring that each part of the filter faces the water surface for a period of time, thus accurately identifying any defective products and preventing missed inspections. The positioning protrusion and positioning slot enable quick engagement, facilitating assembly and disassembly. The tensioning cylinder drives the locking rod to axially extend and retract within the fixed block. When the tensioning cylinder is working, it first pushes the locking assembly upwards for filter installation. After installation, the tensioning cylinder drives the locking assembly downwards, ensuring it tightly abuts against the sealing ring on the fixed block, creating a sealed environment for subsequent airtightness testing. The coupling is used to link two misaligned tensioning drive sources with the drive rod, preventing misalignment issues caused by accumulated tolerances.

[0024] The aforementioned dual-station leak detection device for filters can be further configured as follows: the locking assembly includes a locking rod passing through a fixed block, one end of the locking rod passing through the fixed block and having a threaded joint, and the other end having a buffer connection cavity; the end of the drive rod facing the locking rod has a locking block, the locking block being confined within the buffer connection cavity and having a buffer space with the buffer connection cavity; the buffer connection cavity has a buffer elastic element, one end of the buffer elastic element abutting against the inner wall of the buffer connection cavity, and the other end abutting against the locking block; the locking rod has a screw air supply channel for supplying air to the threaded joint, and the screw air supply channel is connected to the air inlet channel.

[0025] Using the above technical solution, a locking rod and a driving rod are installed inside the fixing block. The driving rod drives the locking rod to move axially up and down while a buffer space exists between them. The filter is fixed in place by the transfer clamp and slowly pressed down towards the fixing block. Then, the threaded connector rotates to complete the connection. Since the end face of the mounting screw hole of the filter must have a screw head for screwing in, and since multiple filters are installed and tested simultaneously, some filters will inevitably be screwed in while others cannot. When the threaded connector and the screw head of the mounting screw hole do not correspond, excessive mutual rotation will prevent the connection from being made. Furthermore, it can damage the mounting screw holes, leading to subsequent installation problems. Therefore, by setting a buffer connection cavity, the threaded joint will automatically retract when it receives resistance, avoiding damage to the mounting screw holes when the screw head is not properly positioned during the screw connection process. After installation, the filter will be pulled by the power source to tightly press against the fixed seat, achieving a sealed environment, which is convenient for subsequent testing. The setting of the screw air supply channel allows the external air source to enter the screw air supply channel through the air inlet and air inlet channel to supply air to the filter installed on the fixed block, and to detect whether there is air leakage in the water.

[0026] The aforementioned dual-station leak detection device for filters can be further configured as follows: the buffer elastic element is a spring, and both the buffer connecting cavity and the locking block are provided with spring fixing grooves for accommodating the buffer elastic element. The spring fixing grooves are connected to the screw air supply channel and the air intake channel. The diameter of the buffer elastic element is larger than the aperture of the screw air supply channel and the air intake channel. The locking block is a dovetail block, and the buffer connecting cavity is provided with a dovetail groove that abuts against the locking block. This allows the locking block to both drive the locking rod to move axially up and down and to drive the locking rod to rotate circumferentially through the locking block.

[0027] With the above technical solution, the buffer elastic element is installed in the spring fixing groove at both ends. This arrangement ensures that the buffer spring always abuts against the two ends and does not shift during deformation. It also ensures air supply while preventing the buffer spring from entering the air supply channel and affecting the air supply. The dovetail structure restricts the axial downward movement and left-right freedom between the locking block and the buffer connecting cavity, while the front-back freedom is locked by the mounting sleeve. This allows the locking screw to move axially up and down and rotate circumferentially while also providing buffer space.

[0028] The aforementioned dual-station leak detection device for filters can be further configured such that: the flipping assembly includes a flipping motor and flipping shafts disposed on both sides of the mounting frame; the output end of the flipping motor is connected to one of the flipping shafts and drives the mounting frame to rotate back and forth at 90°; the mounting frame is a frame structure and an observation window is provided corresponding to the rotation drive assembly.

[0029] Using the above technical solution, the mounting frame is installed on the frame via the flip shafts on both sides. The flip motor drives the flip shafts to rotate, causing the filter on the water surface to rotate and then sink into the water for airtightness testing. The mounting frame has a frame structure, which houses the filter clamping mechanism. However, an observation window is provided to facilitate observation of the working status of the rotation drive component and timely intervention.

[0030] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0032] Figure 2 This is a top view of an embodiment of the present invention after the transfer mechanism has been removed.

[0033] Figure 3 This is a schematic diagram of the flipping mechanism according to an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the filter clamping mechanism according to an embodiment of the present invention.

[0035] Figure 5 for Figure 4 Enlarged view of point A.

[0036] Figure 6 This is a cross-sectional view of the filter clamping mechanism according to an embodiment of the present invention.

[0037] Figure 7 for Figure 6 Enlarged view of point B.

[0038] Figure 8 This is a three-dimensional schematic diagram of the transfer mechanism according to an embodiment of the present invention.

[0039] Figure 9 This is a three-dimensional schematic diagram of the transfer clamp according to an embodiment of the present invention.

[0040] Figure 10 This is a three-dimensional schematic diagram of the tension spring body according to an embodiment of the present invention.

[0041] Figure 11 This is a comparison diagram showing the clamping position when clamping a filter in an embodiment of the present invention and in the background art.

[0042] Figure 12 This is a three-dimensional schematic diagram of the automatic sorting component according to an embodiment of the present invention.

[0043] Figure 13 This is a three-dimensional schematic diagram of the filter feeding mechanism according to an embodiment of the present invention. Detailed Implementation

[0044] like Figures 1-2 , Figure 12 and Figure 13As shown, the dual-station leak testing equipment for filters includes a frame 1, an automatic sorting and feeding mechanism 2 arranged parallel to one side of the frame 1 (the operation method can be found in the applicant's previous invention patent application CN202220410518.2, which describes the operation of an automatic sorting mechanism for leak testing of filters), and a filter unloading mechanism 3. The frame 1 has two leak testing stations for testing the airtightness of filters a. Each leak testing station is equipped with a leak testing water tank 4, and each leak testing water tank 4 has a visual leak testing mechanism (not shown in the figure) above it to monitor the water surface condition within the leak testing water tank 4. The operation method can be found in the waterproof industrial camera leak detection method in the applicant's previous invention patent application (CN202022394396.6). Each leak detection station on the frame 1 is equipped with a flipping mechanism 5 that drives the filter a into or out of the leak detection tank 4, and a transfer mechanism 6 that drives the filter a to circulate sequentially between the automatic sorting feeding mechanism 2, the flipping mechanism 5, and the filter unloading mechanism 3. The automatic sorting feeding mechanism 2 includes a feeding conveyor belt 21 and an automatic sorting component 22 that automatically sorts the filters a at equal intervals on the feeding conveyor belt 21. The feeding mechanism 3 includes a feeding conveyor belt 31 and a screening mechanism 32 located on one side of the feeding conveyor belt 31 to remove unqualified filters a. The feeding conveyor belt 21 and the feeding conveyor belt 31 are evenly distributed in front of the two leak testing stations and work in conjunction with the transfer mechanism 6 of the corresponding leak testing stations. In this technical solution, the original leak testing structure that worked alone is transformed into a dual-station leak testing system, avoiding the phenomenon that the next set of filters a can only be tested after the previous set has been tested, which leads to low efficiency. Specifically, this means that the feeding conveyor belt 21 and the feeding conveyor belt 31 are arranged in front of the two leak testing stations. The filters are sorted in two leak testing stations by the automatic sorting assembly 22. The transfer mechanism 6 in the leak testing station will transfer the filter a in the automatic sorting assembly 22 to the flipping mechanism 5 for fixation. After the filter is tested for air tightness in the leak testing water tank 4 by the flipping mechanism 5, it is sent to the filter unloading mechanism 3 for automatic unloading by the transfer mechanism 5. The defective products are automatically rejected by the screening mechanism 32 which is electrically connected to the visual leak testing mechanism. The automatic sorting assembly 22 will automatically replenish the filter a in the entire automatic sorting assembly 22, realizing dual-station processing, avoiding waiting and improving processing efficiency.

[0045] like Figure 8As shown, the transfer mechanism 6 includes a transfer guide rail 61 mounted above the frame 1, a transfer frame 62 moving on the transfer guide rail 61, a transfer clamping plate 7 mounted on the transfer frame 62, a transverse drive assembly that drives the transfer frame 62 to reciprocate back and forth on the feeding conveyor belt 21, the flipping mechanism 5, and the unloading conveyor belt 31, a longitudinal drive assembly that drives the transfer clamping plate 7 to rise and fall axially along the transfer frame 62, and a clamping drive assembly that drives the transfer clamping plate 7 to open and close, thereby clamping or releasing the filter a. The transverse drive assembly includes transverse synchronous pulleys 63 mounted on both sides of the transfer guide rail 61, a transverse synchronous belt 64 wound around the transverse synchronous pulleys 63 on both sides, a transverse drive motor 65 mounted on one side of the transfer guide rail 61 that drives one of the transverse synchronous pulleys 63 to rotate, and a transverse fixing block 621 mounted on the transfer frame 62 and connected to the transverse synchronous belt. The transverse drive motor 65 drives the transverse synchronous belt 64 to rotate, thereby driving the transfer frame 62 to reciprocate back and forth along the transfer guide rail 61. The longitudinal drive assembly... The system includes longitudinal synchronous pulleys 66 on both sides of the transfer frame 62, a longitudinal synchronous belt (not assembled in the figure) sleeved between the longitudinal synchronous pulleys 66, longitudinal lifting plates 67 on both sides of the transfer clamping plate 7, and a longitudinal drive motor 68 on the transfer frame 62 that drives the longitudinal synchronous pulleys 66 to rotate. A longitudinal drive screw 69 is provided between the longitudinal synchronous pulleys 66 and the longitudinal lifting plate 67. A longitudinal threaded sleeve 671 is provided on the longitudinal lifting plate 67. One end of the longitudinal drive screw 69 is linked to the longitudinal synchronous pulley 66, and the other end is threadedly connected to the longitudinal threaded sleeve 671. The longitudinal drive motor 68 drives the longitudinal synchronous pulleys 66 to rotate, causing the transfer clamping plate 7 to rise and fall axially along the longitudinal drive screw 69. In this technical solution, the transfer clamping plate 7 is used to clamp the filter and, through the transverse drive motor 65 and the longitudinal drive motor 68, drives the transfer clamping plate 7 to sequentially circulate between the feeding conveyor belt 21, the turning mechanism 5, and the unloading conveyor belt 31 to transfer multiple filter a, thereby realizing automated processing.

[0046] like Figures 9-11As shown, the transfer clamp 7 includes a main clamp 71 and a secondary clamp 72. Both the main clamp 71 and the secondary clamp 72 are provided with several corresponding first V-shaped clamping slots 73. The corresponding first V-shaped clamping slots 73 between the main clamp 71 and the secondary clamp 72 form quadrilateral clamping positions b that can clamp the filter a. The clamping drive assembly drives the main clamp 71 and the secondary clamp 72 to move relative to each other, thereby controlling the opening and closing of the transfer clamp 7. Each adjacent quadrilateral clamping position b is provided with a clamping force that applies to the first V-shaped clamping slots 73 on the main clamp 71 and the secondary clamp 72. The elastic tensioning mechanism includes a tension spring body 74, with positioning rings 741 at both ends. The main clamp 71 and the auxiliary clamp 72 have mounting holes 75 at the corresponding positions of the positioning rings 741 to fix the positioning rings 741 onto the main clamp 71 and the auxiliary clamp 72, respectively. The two ends of the tension spring body 74 pass through the main clamp 71 and the auxiliary clamp 72, respectively, and the positioning rings 741 are fixedly connected to the main clamp 71 and the auxiliary clamp 72 by bolts passing through the mounting holes 75. The main clamp 71 and / or the auxiliary clamp 72 have mounting holes 75 at the corresponding positions. A tension locking hole 76 is provided, which is perpendicular to the mounting hole 75. The clamping drive assembly includes open clamping cylinders 77 disposed on both sides of the main clamp 71 and the auxiliary clamp 72. The output ends of the open clamping cylinders 77 are respectively connected to the main clamp 71 and the auxiliary clamp 72, and drive the main clamp 71 and the auxiliary clamp 72 to move in opposite directions. When installing the tension spring body 74, one end of the tension spring body 74 passes into the main clamp 71, so that the positioning ring 741 at that end stays in the mounting hole 75. The mounting hole 75 is preferably a threaded hole. Bolts can fix the positioning ring 741 in the mounting hole 75, so that the main clamp 71 is fixedly connected to one end of the tension spring body 74, while the other end of the tension spring body 74 will pass into the auxiliary clamp 72. By tightening the locking hole 76, the hook can pass through the tightening locking hole 76 and then keep the positioning ring 741 at this end in the mounting hole 75. Bolts can fix the positioning ring 741 at this end in the mounting hole 75, so that the auxiliary clamp 72 is fixedly connected to the tension spring body 74, thereby driving the main clamp 71 and the auxiliary clamp 72 to clamp each other, ensuring the reliability of clamping.

[0047] like Figure 11As shown, this diagram is a comparison of the clamping components in the present invention and the background art document when clamping large-diameter filters (the left side is the background art, and the right side is the present invention). By changing the original semi-circular clamping opening to a first V-shaped clamping opening 73, when clamping a larger filter a, for example, a filter a with a minimum clamping opening diameter of 60cm, if it is changed to clamp a 70cm filter a, the original circular clamping position and the filter a will intersect, changing from surface contact to point contact, resulting in unstable clamping. However, after using the first V-shaped clamping opening 73, the contact method between the clamping position and the filter a will become tangential, and the contact will be more stable. The surface will still have a large area of ​​surface contact, avoiding the instability and easy tipping caused by the change from surface contact to point contact in the original circular clamping position to the filter a. In this way, the first V-shaped clamp 73 can clamp filters a of different specifications. Taking a filter a with a diameter of 60cm as an example, the original semi-circular clamp can only stably clamp a 60cm filter. If a larger filter a needs to be stably clamped, the main clamp 71 and the auxiliary clamp 72 must be replaced. However, after changing to the V-shaped clamp 73, it can stably clamp filters a in the range of 60-100cm, which greatly improves the adaptability of the transfer clamp 7.

[0048] like Figures 3-7As shown, the flipping mechanism 5 includes a mounting frame 51 and a flipping assembly disposed on the side of the mounting frame 51 for driving the mounting frame 51 to flip so that it enters or leaves the leak test tank 4. The mounting frame 51 is provided with at least two filter clamping mechanisms. The filter clamping mechanism includes a fixing block 8, a mounting sleeve 81, and a drive rod 82 passing through the mounting sleeve 81. One end of the drive rod 82 is provided with a locking assembly that locks the filter to be tested a onto the fixing block 8, and the other end is provided with a tensioning cylinder 83. The drive rod 82 is provided with an air inlet 821. An air intake channel 822 is provided, which is connected to the air intake nozzle 821 and supplies air to the filter under test a, which is locked by the locking assembly. A rotary drive motor 52 is provided on the mounting bracket 51. The rotary drive motor 52 drives the filter under test a on the locking assembly to rotate through the rotary drive assembly. The drive rod 82, through the tension cylinder 83, has a first state in which the filter under test a, which is fixed by the locking assembly, is pressed against the fixing block 8, and a second state in which the filter under test a is released from the pressing state between the fixing block 8 and the fixing block 8. The flipping assembly includes a flipping motor 53 and a mounting bracket 51. The output end of the flipping motor 53 is connected to one of the flipping shafts 531 on both sides, driving the mounting bracket 51 to rotate back and forth by 90°. The mounting bracket 51 has a frame structure and an observation window 511 is provided for the corresponding rotary drive component. The observation window 511 allows for direct observation of the operation of the rotary drive component. During use, when the tensioning cylinder 83 is working, it will first push the drive rod 82 upward to push out the locking component for the filter a to be installed. After installation, the tensioning cylinder 83 will drive the locking component downward to make it lock with the fixed block 8. The sealing rings fit tightly together to form a sealed environment, facilitating subsequent airtightness testing. After sealing, the filter will sink into the water with the flip motor 53, while the observation window 511 will not enter the water surface. The air inlet 821 will be connected to the air source, and the air will be sent through the air inlet channel 822 to the filter a connected to the locking assembly for airtightness testing. During operation, the rotation drive motor 52 will drive the filter to rotate in the water through the rotation drive assembly, so that each part of the filter will face the water surface for a period of time, thereby accurately identifying whether there are defective products and avoiding missed detection.

[0049] like Figures 3-5As shown, the rotary drive assembly includes a drive gear 521 located at the output end of the rotary drive motor 52 and a drive gear 811 located outside the mounting sleeve 81 and linked with the drive gear 521. The drive gear 811 drives the mounting sleeve 81 to rotate, and the mounting sleeve 81 drives the drive rod 82 to rotate. The drive rod 82 is linked to the locking assembly to rotate. The drive gear 811 and the mounting sleeve 81, and the mounting sleeve 81 and the drive rod 82 are linked by positioning protrusions 812 and positioning slots 813 to achieve quick engagement and facilitate disassembly and assembly. The tensioning cylinder 83 is fixedly located on the side of the mounting bracket 51 away from the fixed block 8, and its output end is connected to the drive rod 82. It drives the locking assembly to axially extend and retract within the fixed block 8. The tensioning cylinder 83 and the drive rod 82 are connected by a coupling 84. The coupling 84 locks two misaligned shafts together, thereby avoiding concentricity problems caused by accumulated tolerances and enabling them to move quickly together.

[0050] like Figures 4-7 As shown, the locking assembly includes a locking rod 85 passing through the fixed block 8. One end of the locking rod 85 extends out of the fixed block and is provided with a threaded connector 86, while the other end is provided with a buffer connecting cavity 851. The end of the drive rod 82 facing the locking rod 85 is provided with a locking block 823. The locking block 823 is confined within the buffer connecting cavity 851 and has a buffer space c with the buffer connecting cavity 851. A buffer spring 87 is provided within the buffer connecting cavity 851. One end of the buffer spring 87 abuts against the inner wall of the buffer connecting cavity 851, and the other end abuts against the locking block 823. The locking rod 85 is provided with a thread for threading. The screw air supply channel 852 of the connector 86 is connected to the air inlet channel 822. The air inlet nozzle 821 is connected to the air source and sends the gas through the air inlet channel 822 and the buffer connection cavity 851 to the filter a connected to the threaded connector 86 for air tightness testing. Due to the presence of the mounting sleeve 81, the buffer connection cavity 851 will not leak in water. The setting of the buffer connection cavity 851 makes the threaded connector 86 automatically retract when it receives resistance, avoiding damage to the mounting screw hole when the screw head is not properly positioned and the threaded connection is forced during the screwing process.

[0051] like Figure 7 As shown, both the buffer connection cavity 851 and the locking block 823 are provided with spring fixing grooves 853 for accommodating the buffer spring 87. The spring fixing grooves 853 are connected to the screw air supply channel 852 and the air inlet channel 822. The diameter of the buffer spring 87 is larger than the aperture of the screw air supply channel 852 and the air inlet channel 822. This arrangement ensures that the buffer spring 87 always abuts against both ends and does not shift during the deformation process, and at the same time, while ensuring air supply, the buffer spring 73 will not enter the air supply channel.

[0052] like Figure 5As shown, the locking block 823 is a dovetail locking block, and the buffer connecting cavity 851 is provided with a dovetail groove 824 that abuts against the locking block 823. This allows the locking block 823 to both drive the locking rod 85 to move axially up and down, and to drive the locking rod to rotate circumferentially. This restricts the degree of freedom in the axial downward movement and left and right directions between the locking block 823 and the buffer connecting cavity 851, while the degree of freedom in the front and back directions is locked by the mounting sleeve 81. This allows for easy disassembly and assembly when the mounting sleeve 81 is removed, and provides buffer space for the threaded joint 86 when the mounting sleeve 81 is installed, preventing damage to the mounting screw hole of the filter a when the screw head is not found.

Claims

1. A dual-station leak testing device for filters, comprising a frame, an automatic sorting and feeding mechanism arranged parallel to one side of the frame, and a filter unloading mechanism, characterized in that: The frame is equipped with two leak testing stations for airtightness testing of the filters. Each leak testing station contains a leak testing water tank, and a visual leak testing mechanism is installed above each tank to monitor the water level. The frame, corresponding to each leak testing station, is equipped with a tilting mechanism to move the filters into or out of the leak testing water tank, and a transfer mechanism to circulate the filters sequentially between an automatic sorting feeding mechanism, a tilting mechanism, and a filter unloading mechanism. The automatic sorting feeding mechanism includes a feeding conveyor belt and an automatic sorting component positioned on the feeding conveyor belt to automatically and equidistantly sort the filters. The filter unloading mechanism includes a unloading conveyor belt and an automatic sorting component positioned on the feeding conveyor belt to automatically sort the filters at equal intervals. A screening mechanism on one side of the feeding conveyor belt removes defective filters. The feeding and discharging conveyors are evenly distributed in front of two leak testing stations and work in conjunction with the transfer mechanisms of the corresponding leak testing stations. The flipping mechanism includes a mounting frame and a flipping assembly located on the side of the mounting frame for driving the mounting frame to flip so that it enters or leaves the leak testing tank. The mounting frame is equipped with at least two filter clamping mechanisms. Each filter clamping mechanism includes a fixing block, a mounting sleeve, and a drive rod passing through the mounting sleeve. One end of the drive rod is equipped with a locking assembly to lock the filter to be tested onto the fixing block, and the other end is equipped with a tensioning power source. The drive rod is equipped with an inlet / outlet / outlet / removal mechanism. The air inlet is provided within the drive rod, which has an air inlet channel that connects to the air inlet and supplies air to the filter under test, which is locked by the locking assembly. A rotary drive motor is mounted on the mounting bracket. The rotary drive motor drives the filter under test on the locking assembly to rotate via the rotary drive assembly. The drive rod, through a tension drive source, has a first state where it presses the filter under test, which is fixed to the locking assembly, onto a fixed block, and a second state where it releases the pressurization of the filter under test from the fixed block. The locking assembly includes a locking rod passing through the fixed block. One end of the locking rod protrudes from the fixed block and has a threaded joint, while the other end has a buffer connection cavity. The drive rod faces the end of the locking rod. A locking block is provided, which is confined within the buffer connection cavity and has a buffer space with the buffer connection cavity. A buffer elastic element is provided inside the buffer connection cavity. One end of the buffer elastic element abuts against the inner wall of the buffer connection cavity, and the other end abuts against the locking block. The locking rod is provided with a screw air supply channel for supplying air to the threaded joint. The screw air supply channel is connected to the air inlet channel. The flipping assembly includes a flipping motor and flipping shafts arranged on both sides of the mounting frame. The output end of the flipping motor is connected to one of the flipping shafts and drives the mounting frame to rotate back and forth by 90°. The mounting frame is a frame structure, and an observation window is provided corresponding to the rotation drive assembly.

2. The dual-station leak detection device for filters according to claim 1, characterized in that: The transfer mechanism includes a transfer guide rail mounted above the frame, a transfer frame that moves along the transfer guide rail, a transfer clamping plate mounted on the transfer frame, a transverse drive assembly that drives the transfer frame to move back and forth on the feeding conveyor belt, the flipping mechanism and the unloading conveyor belt, a longitudinal drive assembly that drives the transfer clamping plate to rise and fall along the axial direction of the transfer frame, and a clamping drive assembly that drives the transfer clamping plate to open and close, thereby clamping or releasing the filter.

3. The dual-station leak detection device for filters according to claim 2, characterized in that: The transfer clamp includes a main clamp and a secondary clamp. Both the main clamp and the secondary clamp are provided with a number of corresponding first V-shaped clamping slots. The corresponding first V-shaped clamping slots between the main clamp and the secondary clamp form a quadrilateral clamping position for holding the filter. The clamping drive assembly drives the main clamp and the secondary clamp to move relative to each other, thereby controlling the opening and closing of the transfer clamp.

4. The dual-station leak detection device for filters according to claim 3, characterized in that: Each of the adjacent quadrilateral clamping positions is provided with an elastic tensioning mechanism that applies a clamping force to the first V-shaped jaws of the main and auxiliary clamps. The elastic tensioning mechanism includes a tension spring body with positioning rings at both ends. The main and auxiliary clamps have mounting holes at the corresponding positioning rings to fix the positioning rings to the main and auxiliary clamps respectively. The two ends of the tension spring body pass through the main and auxiliary clamps respectively and are fixedly connected to the main and auxiliary clamps. The main clamp and / or auxiliary clamp have tension locking holes at the corresponding mounting holes. The tension locking holes are perpendicular to the mounting holes. The clamping drive assembly includes open clamping cylinders on both sides of the main and auxiliary clamps. The output ends of the open clamping cylinders are connected to the main clamp and auxiliary clamp respectively and drive the main clamp and auxiliary clamp to move in opposite directions.

5. The dual-station leak detection device for filters according to any one of claims 2-4, characterized in that: The transverse drive assembly includes transverse synchronous pulleys disposed on both sides of the transfer guide rail, a transverse synchronous belt wound around the transverse synchronous pulleys on both sides, a transverse drive motor disposed on one side of the transfer guide rail to drive one of the transverse synchronous pulleys to rotate, and a transverse fixing block disposed on the transfer frame and connected to the transverse synchronous belt. The transverse drive motor drives the transverse synchronous belt to rotate, thereby driving the transfer frame to move back and forth along the transfer guide rail. The longitudinal drive assembly includes longitudinal synchronous pulleys disposed on both sides of the transfer frame, a longitudinal synchronous belt sleeved between the longitudinal synchronous pulleys, longitudinal lifting plates disposed on both sides of the transfer clamping plate, and a longitudinal drive motor disposed on the transfer frame to drive the longitudinal synchronous pulleys to rotate. A longitudinal drive screw is disposed between the longitudinal synchronous pulleys and the longitudinal lifting plate. A longitudinal threaded sleeve is disposed on the longitudinal lifting plate. One end of the longitudinal drive screw is linked to the longitudinal synchronous pulley, and the other end is threadedly connected to the longitudinal threaded sleeve. The longitudinal drive motor drives the longitudinal synchronous pulleys to rotate, causing the transfer clamping plate to move up and down axially along the longitudinal drive screw.

6. The dual-station leak detection device for filters according to claim 1, characterized in that: The rotary drive assembly includes a drive gear located at the output end of a rotary drive motor and a drive gear located outside the mounting sleeve and linked to the drive gear. The drive gear drives the mounting sleeve to rotate, the mounting sleeve drives the drive rod to rotate, and the drive rod is linked to the locking assembly to rotate. The drive gear and the mounting sleeve, as well as the mounting sleeve and the drive rod, are linked by positioning protrusions and positioning slots. The tension drive source is a tension cylinder, which is fixedly located on the side of the mounting bracket away from the fixed block, and its output end is connected to the drive rod. It drives the locking assembly to axially extend and retract within the fixed block. The tension drive source and the drive rod are connected by a coupling.

7. The dual-station leak detection device for filters according to claim 1, characterized in that: The buffer elastic element is a spring. Both the buffer connecting cavity and the locking block are provided with spring fixing grooves for accommodating the buffer elastic element. The spring fixing grooves are connected to the screw air supply channel and the air intake channel. The diameter of the buffer elastic element is larger than the aperture of the screw air supply channel and the air intake channel. The locking block is a dovetail block. The buffer connecting cavity is provided with a dovetail groove that abuts against the locking block, so that the locking block can both drive the locking rod to move axially up and down and drive the locking rod to rotate circumferentially through the locking block.

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