Pressing device for bag-in and bag-out filter

Abstract

The utility model discloses a pressing device for a bag inlet and outlet filter, which is applied to the technical field of ventilation safety protection equipment, is parallelly arranged opposite to a sealing surface of a filter shell, and comprises a U-shaped pressing plate with a pair of long foot plate and short foot plate, and a rotating shaft arranged between the long foot plate and the short foot plate along the length direction of the U-shaped pressing plate, the first end of the rotating shaft extends out of the panel of the shell to be connected with a driving mechanism for driving the panel to rotate, the long foot plate is farther from the sealing surface than the short foot plate, and the projection of the long foot plate and the projection of the filter on the sealing surface have coincident projection; the cam mechanism is connected to the rotating shaft and used for driving the U-shaped pressing plate to move towards one side far away from the sealing surface, and the pressing mechanism is connected to the U-shaped pressing plate and used for enabling the long foot plate to press the filter. According to the hold-down device for the bag-in and bag-out filter, stable, reliable and tight fit between the filter and a sealing surface is realized by using the relationship between the cam mechanism and the hold-down mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation safety protection equipment, in particular to a pressing device for a bag-in-bag-out filter. Background Art

[0002] Filters can remove pathogens, dust, and other harmful substances. Bag-in-bag-out filters, as specialized, efficient ventilation and safety equipment for high-biorisk facilities, are a crucial component of biosafety facilities. They remove highly pathogenic microorganisms transmitted through aerosols from the air, filtering and trapping them within system piping to prevent their escape and protect personnel and the surrounding environment. The filter clamping device is the most critical component of bag-in-bag-out filters, and its reliability directly impacts the safe operation of the equipment.

[0003] Existing filter clamping mechanisms often utilize a planar four-bar linkage. While this mechanism is simple in structure, it presents several significant issues. Due to the large clearance between the pins at the connecting rods, the connections can become loose after prolonged use, leading to increased movement of the connecting rods. This results in inconsistent travel on both sides of the clamping surface, leading to uneven force on the clamping surface of the clamping mechanism. This uneven force can compromise the seal and easily cause polluted gases to leak outdoors, threatening the safety of the surrounding environment.

[0004] The clamping force of the connecting rod mechanism is closely related to the change in the connecting rod stroke, especially when it is in a self-locking state; when it is self-locking, it is either in a clamping state or a loose state. Therefore, the connecting rod mechanism has high requirements for early installation and debugging, and is not easy to operate.

[0005] The clamping force of a mechanical linkage after self-locking is only related to the fixed clamping stroke. Existing filter sealing surfaces are often made of polyurethane foam. Over time, due to heat and fatigue, this material loses its elasticity, causing the filter seal to compact and become thinner. Since the clamping stroke remains unchanged after the mechanical structure self-locks, this results in a sharp drop in clamping force, resulting in a poorer sealing effect and reduced sealing safety and stability.

[0006] In summary, how to effectively solve the problems of loose sealing surface in existing filter pressing mechanisms, which may cause leakage of polluted gas and threaten the safety of the surrounding environment, is an urgent problem that technicians in this field need to solve. Utility Model Content

[0007] The purpose of the utility model is to provide a pressing device for a bag-in-bag-out filter, which uses the relationship between a cam mechanism and a pressing mechanism to achieve stable, reliable and tight fit between the filter and the sealing surface.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A clamping device for a bag-in-bag-out filter, which is arranged parallel to the opposite side of the sealing surface of the filter housing, includes a U-shaped pressure plate with a pair of long legs and a short leg, and a rotating shaft arranged between the long legs and the short leg along the length direction of the U-shaped pressure plate, the first end of the rotating shaft extends out of the panel of the housing to connect to a driving mechanism for driving it to rotate, the long leg is farther away from the sealing surface than the short leg, and the long leg and the filter have overlapping projections on the projection of the sealing surface; it also includes a cam mechanism connected to the rotating shaft for driving the U-shaped pressure plate to move toward the side away from the sealing surface, and a clamping mechanism connected to the U-shaped pressure plate for causing the long leg to press the filter.

[0010] Optionally, a large through hole is provided on the long foot plate, and a small through hole is provided on the short foot plate. The axes of the large through hole and the small through hole coincide to form a through hole of the U-shaped pressure plate. The clamping mechanism includes a bolt mounted in the through hole and a preload spring mounted on the bolt. One end of the bolt is connected to the fixing seat of the shell, and the other end is provided with a positioning piece on the outside of the long foot plate. The diameters of the preload spring and the positioning piece are between the large through hole and the small through hole. One end of the preload spring abuts against the short foot plate, and the other end passes through the large through hole and abuts against the positioning piece.

[0011] Optionally, the short leg is provided with a positioning sleeve facing the long leg at the small through hole, and the pre-compression spring is sleeved on the positioning sleeve.

[0012] Optionally, several groups of reinforcing partitions are connected between the long leg plates and the short leg plates, the reinforcing partitions are perpendicular to the long leg plates, the reinforcing partitions are provided with connecting holes, the panel is provided with limiting holes, and the rotating shaft is connected to the connecting holes and the limiting holes.

[0013] Optionally, the cam mechanism is an elliptical cam mechanism. When the rotating shaft drives the elliptical cam mechanism to rotate until the long side of the cam mechanism abuts against the long foot plate, the U-shaped pressure plate moves the largest distance to the side away from the sealing surface, and the long side end of the elliptical cam mechanism has a plane in contact with the long foot plate.

[0014] Optionally, the U-shaped pressure plate and the second end of the rotating shaft extend to the back plate of the housing, and the rotating shaft is provided with at least two sets of the cam mechanisms and two sets of the pressing mechanisms, respectively pressing the front and rear of the filter;

[0015] There are two sets of pressing devices, which respectively press the bottom and the top of the filter.

[0016] Optionally, the driving mechanism is a motor connected to the first end of the rotating shaft, and the motors of the two sets of the pressing devices rotate synchronously.

[0017] Optionally, the driving mechanism is a handle connected to the first end of the rotating shaft. When the long side of the cam mechanism contacts the long foot plate, the handle is in a non-blocking position of the shell opening; when the long side of the cam mechanism is not in contact with the long foot plate, the handle is in a blocking position of the shell opening.

[0018] Optionally, a fitting judgment mechanism for judging whether the filter fits the sealing surface is further included, and the fitting judgment mechanism includes:

[0019] a plurality of distance sensors provided at each corner of the sealing surface for detecting the distance between the sealing surface and the filter;

[0020] A first fitting control unit is connected to the distance sensors and is used to control the driving mechanism to stop running when all the distance sensors detect that the distances between the sealing surface and the filter are zero.

[0021] Optionally, the fitting judgment mechanism further includes:

[0022] a pressure sensor mounted on the contact surface between the sealing surface and each corner of the filter for detecting the pressure between the sealing surface and the filter;

[0023] A second fitting control unit is connected to the pressure sensors and is used to control the driving mechanism to stop operating when all the pressure sensors detect that the pressures between the sealing surface and the filter are equal.

[0024] The present invention provides the following advantageous effects: a U-shaped pressure plate comprises a pair of long and short legs, with the short leg proximal to the sealing surface and the long leg further from the sealing surface than the short leg. The long leg and the filter form an overlapping projection on the sealing surface, achieving a compression effect where the long leg presses against the filter. A rotating shaft is disposed along the length of the U-shaped pressure plate, located between the long and short legs. A first end of the rotating shaft extends beyond the panel of the housing to facilitate connection to a drive mechanism for rotating the long leg. A cam mechanism is connected to the rotating shaft, and rotation of the rotating shaft drives the cam mechanism. The cam mechanism has a short side and a long side, which are smoothly connected to the long side, resulting in different rotational radii for the cam mechanism. The rotational radius of the short side is smaller than the distance between the rotating shaft and the long leg, while the rotational radius of the long side is larger than the distance between the rotating shaft and the long leg. When the cam rotates until the long side abuts the long leg, it drives the U-shaped pressure plate to move away from the sealing surface, thereby separating the long leg from the filter. This disengages the compression mechanism from the filter, allowing the filter to be freely removed. The clamping mechanism is connected to the U-shaped pressure plate, which drives the long leg to press against the sealing surface. When the long side is not in contact with the long leg, the clamping force of the clamping mechanism causes the long leg to press against the filter, thereby tightly fitting the filter to the sealing surface.

[0025] The utility model provides a clamping device for bag-in-bag-out filters. A driving mechanism rotates a rotating shaft, which in turn drives a cam mechanism. The rotation of the cam mechanism pushes the long and short legs of a U-shaped clamping plate, causing them to tighten or loosen the filter. The clamping force can be adjusted, enabling quick filter replacement while ensuring that the seal between the filter and the housing sealing surface is not affected during filter replacement, thereby ensuring the continuity and safety of the filtration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of a pressing device for a bag-in-bag-out filter provided in a specific embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a clamping device for a bag-in-bag-out filter;

[0029] Figure 3 A diagram showing the use of a clamping device for bag-in-bag-out filter;

[0030] Figure 4 This is a diagram of the non-compression state of the compression device;

[0031] Figure 5 This is a diagram of the clamping state of the clamping device.

[0032] Reference numerals:

[0033] 1-U-shaped pressure plate, 2-positioning sleeve, 3-preload spring, 4-rotating shaft, 5-positioning plate, 6-tightening nut, 7-bolt, 8-elliptical cam mechanism, 9-reinforced partition, 10-fixing seat, 11-fixing nut, 12-handle, 13-sealing surface, 14-filter. DETAILED DESCRIPTION

[0034] The core of the utility model is to provide a pressing device for a bag-in-bag-out filter. The pressing device for a bag-in-bag-out filter uses the relationship between a cam mechanism and a pressing mechanism to achieve stable, reliable and tight fit between the filter and the sealing surface.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Please refer to Figures 1 to 5 , Figure 1 This is a schematic structural diagram of a pressing device for a bag-in-bag-out filter provided in a specific embodiment of the present invention; Figure 2 is a cross-sectional view of a clamping device for a bag-in-bag-out filter; Figure 3 A diagram showing the use of a clamping device for bag-in-bag-out filter; Figure 4 This is a diagram of the non-compression state of the compression device; Figure 5 This is a diagram of the clamping state of the clamping device.

[0037] In a specific embodiment, the clamping device for bag-in-bag-out filter provided by the present invention is arranged parallel to the opposite side of the sealing surface 13 of the filter housing 14, and includes a U-shaped pressure plate 1 with a pair of long legs and short legs, and a rotating shaft 4 arranged between the long legs and the short legs along the length direction of the U-shaped pressure plate 1. The first end of the rotating shaft 4 extends out of the panel of the housing to connect to a driving mechanism that drives it to rotate. The long legs are farther away from the sealing surface 13 than the short legs, and the long legs and the filter 14 have overlapping projections on the projection of the sealing surface 13; it also includes a cam mechanism connected to the rotating shaft 4 for driving the U-shaped pressure plate 1 to move toward the side away from the sealing surface 13, and a clamping mechanism connected to the U-shaped pressure plate 1 for causing the long legs to press the filter 14.

[0038] In the above structure, the bag-in-bag-out filter pressing device is arranged parallel to the opposite side of the housing sealing surface 13, and is used to make the filter 14 fit tightly against the housing sealing surface 13, ensuring the sealing between the filter 14 and the housing sealing surface 13. The pressing device includes a U-shaped pressing plate 1, a rotating shaft 4, a driving mechanism, a cam mechanism, and a pressing mechanism.

[0039] The U-shaped pressure plate 1 is composed of a pair of long and short legs, wherein the short legs are close to the sealing surface 13, while the long legs are relatively far away from the sealing surface 13. This design ensures that the opening of the U-shaped pressure plate 1 faces the side close to the sealing surface 13. Whether the pressing device is located at the bottom or the top, the opening direction of the U-shaped pressure plate 1 is consistent with its position, that is, the opening is upward at the bottom and downward at the top.

[0040] The projections of the long leg and filter 14 on sealing surface 13 overlap, meaning the long leg evenly compresses filter 14, achieving an effective seal. By ensuring good contact between the long leg and sealing surface 13, gas leaks caused by uneven pressure or poor sealing can be avoided, which is crucial for maintaining environmental safety and improving filtration efficiency.

[0041] The shaft 4 is disposed along the length of the U-shaped pressure plate 1, between the long and short legs, and more preferably at the center thereof. This arrangement ensures uniform force distribution, thereby providing a balanced force when compressing the filter 14. The first end of the shaft 4 extends beyond the housing panel to facilitate connection to an external drive mechanism, such as a motor or manual handle 12, for rotational operation.

[0042] The shaft 4 rotates flexibly between the long and short legs of the U-shaped pressure plate 1, which is achieved by the cooperation of the shaft 4 with the connection holes on the reinforcing partition 9 and the limit holes on the panel. This design allows the shaft 4 to transmit power while also providing the necessary adjustment function.

[0043] The cam mechanism is connected to the rotating shaft 4 via a square shaft. The square hole of the cam mechanism is connected to the square shaft on the rotating shaft 4. The cam mechanism rotates with the rotating shaft 4, while preventing the cam mechanism from rotating circumferentially relative to the rotating shaft 4. This achieves circumferential positioning of the cam mechanism relative to the rotating shaft 4, ensuring that the relative positions of the two are fixed. To further ensure the stability of the cam mechanism, the rotating shaft 4 and the cam mechanism are provided with sockets. A pin is connected to the socket to achieve axial positioning of the cam mechanism relative to the rotating shaft 4, preventing the cam mechanism from moving axially. Through axial and circumferential positioning, the cam mechanism is firmly fixed to the rotating shaft 4, preventing any movement or rotation relative to the rotating shaft 4, ensuring the stability and reliability of the mechanism.

[0044] This application utilizes the rotation of a cam mechanism to control the opening and closing of the U-shaped pressure plate 1, thereby achieving compression and release of the filter 14. Specifically, the cam mechanism has a short side and a long side, which are smoothly connected, allowing the cam's radius to change during rotation. This design allows the cam mechanism to have different contact points with the long leg of the U-shaped pressure plate 1 during rotation, thereby achieving different motion trajectories.

[0045] The rotation radius of the short side is smaller than the distance between the rotating shaft 4 and the long leg, meaning that when this portion of the cam rotates, it does not contact the long leg. Conversely, the rotation radius of the long side is larger than the distance between the rotating shaft 4 and the long leg, allowing the long side to contact the long leg when rotated to a specific position. When the cam rotates to the point where the long side abuts the long leg, it drives the U-shaped pressure plate 1 away from the sealing surface 13. This action causes the long leg to separate from the filter 14, thereby disengaging the clamping device from the filter 14 and allowing the filter 14 to be removed freely.

[0046] The present application utilizes a clamping mechanism to ensure that the long leg of the U-shaped pressure plate 1 can accurately and reliably press the filter 14 toward the sealing surface 13, thereby achieving a tight seal between the filter 14 and the housing. Specifically, the clamping mechanism is connected to the U-shaped pressure plate 1. When the long side of the cam mechanism is not in contact with the long leg, for example, when the long side is parallel to the long leg, the clamping mechanism drives the long leg to press toward the sealing surface 13 until the long leg presses the filter 14, ensuring that the filter 14 is tightly fitted to the sealing surface 13.

[0047] The clamping device for the bag-in-bag-out filter provided by the present invention provides a reliable, precise and easy-to-operate clamping mechanism to ensure the sealing between the filter 14 and the housing, prevent leakage, and make the clamping and releasing of the filter 14 simple and quick, thereby improving the efficiency of maintaining and replacing the filter 14. The rotation of the rotating shaft 4 drives the rotation of the cam mechanism, and the change in the rotation radius of the cam mechanism is used to control the position of the U-shaped pressure plate 1, thereby realizing the opening and closing action of the U-shaped pressure plate 1, and realizing the clamping and release of the filter 14. This mechanism ensures that the clamping device can accurately control the clamping and release of the filter 14, thereby improving the efficiency and reliability of the operation. Precise clamping force can be achieved through the clamping mechanism. This precise control helps to prevent over-compression or under-compression of the filter 14, thereby ensuring the sealing and safety of the filter 14.

[0048] On the basis of the above-mentioned specific embodiments, a large through hole is provided on the long foot plate, and a small through hole is provided on the short foot plate. The axes of the large through hole and the small through hole coincide to form a through hole of the U-shaped pressure plate 1. The clamping mechanism includes a bolt 7 mounted in the through hole and a preload spring 3 mounted on the bolt 7. One end of the bolt 7 is connected to the fixing seat 10 of the shell, and the other end is provided with a positioning piece 5 on the outside of the long foot plate. The diameters of the preload spring 3 and the positioning piece 5 are between the large through hole and the small through hole. One end of the preload spring 3 abuts on the short foot plate, and the other end passes through the large through hole and abuts on the positioning piece 5.

[0049] In one specific embodiment, the clamping mechanism is a carefully designed mechanical structure that ensures a tight seal between the bag-in / bag-out filter and the housing. The clamping mechanism can be spring-loaded to prevent over-clamping. This design provides an appropriate preload while avoiding excessive pressure on the filter 14, thereby protecting the filter 14 from damage. The clamping mechanism can also be limited by a ratchet mechanism, further enhancing the safety of the filter 14. The ratchet mechanism ensures that the clamping device does not accidentally release during the clamping process, enhancing the reliability of the entire system.

[0050] Exemplarily, the clamping mechanism includes a bolt 7 and a pre-stressing spring 3. A large through hole is provided on the long leg of the U-shaped pressure plate 1, and a small through hole is provided on the short leg, and the diameter of the large through hole is larger than the diameter of the small through hole. The axes of the two through holes coincide, forming a through hole of the U-shaped pressure plate 1, that is, forming a continuous channel for passing the bolt 7 of the clamping mechanism. The bolt 7 is sleeved on the through hole, and one end is connected to the fixing seat 10 of the shell. Specifically, it can be fastened to the fixing seat 10 by a fixing nut 11, and the fixing nut 11 is welded to the box fixing seat 10. The other end of the bolt 7 is provided with a positioning piece 5 on the outside of the long leg, and the positioning piece 5 can be positioned by a clamping nut 6. The pre-stressing spring 3 is sleeved on the bolt 7, and the bolt 7 is the guide rod of the pre-stressing spring 3. When the U-shaped pressure plate 1 moves freely along the bolt 7, the pre-stressing spring 3 moves along the bolt 7. The diameter of the preload spring 3 is between the large through hole and the small through hole. One end abuts against the short foot plate, and the other end passes through the large through hole and abuts against the positioning piece 5. The positioning piece 5 is used to limit the movement of the preload spring 3. The large through hole can pass through the positioning piece 5. The preload spring 3 provides a preload force between the positioning piece 5 and the short foot plate.

[0051] The preload spring 3 is in a compressed state in the initial state, providing the required preload force for the U-shaped pressure plate 1. This preload force ensures that the U-shaped pressure plate 1 maintains pressure on the filter 14. When the long side of the cam contacts the long leg, it drives the U-shaped pressure plate 1 to move along the bolt 7 to the side away from the sealing surface 13. At this time, the compression of the preload spring 3 intensifies. Conversely, when the U-shaped pressure plate 1 moves to the side close to the sealing surface 13, the preload spring 3 helps to smoothly compress the filter 14. When it is necessary to compress the filter 14, the drive mechanism rotates the shaft 4, driving the cam mechanism to rotate, pushing the U-shaped pressure plate 1 to move, so that the long leg applies pressure to the filter 14. The action of the preload spring 3 ensures that while the filter 14 is quickly replaced, the sealing between the filter 14 and the housing is maintained, preventing the risk of leakage due to insufficient pressure.

[0052] The clamping force of the clamping mechanism is provided by the elastic force of the compression spring and can be adjusted by adjusting the stroke length of the spring compression nut 6. To ensure consistent clamping force, the stroke lengths of all spring compression nuts 6 must be adjusted to be consistent. By ensuring consistent clamping force across all springs, inconsistent clamping force on both sides is avoided, thereby achieving uniform compression of the filter 14.

[0053] Based on the above embodiment, the clamping device uses the pre-load spring 3 to provide a stable pre-load force, and accurately controls the movement of the U-shaped pressure plate 1 through the rotation of the cam mechanism to achieve reliable clamping and rapid replacement of the filter 14, while maintaining the sealing and system reliability.

[0054] On the basis of the above-mentioned specific embodiments, the short leg is provided with a positioning sleeve 2 facing the long leg at the small through hole, and the pre-stressed spring 3 is sleeved on the positioning sleeve 2. The positioning sleeve 2 provides a stable installation base for the pre-stressed spring 3 and has a guiding effect on the pre-stressed spring 3, ensuring that the pre-stressed spring 3 can expand and contract stably and smoothly.

[0055] Based on the above-mentioned specific embodiments, several groups of reinforcing partitions 9 are connected between the long leg plates and the short leg plates. The reinforcing partitions 9 are perpendicular to the long leg plates. Connecting holes are provided on the reinforcing partitions 9, and limiting holes are provided on the panel. The rotating shaft 4 is connected to the connecting holes and the limiting holes.

[0056] In a specific embodiment, the reinforcing partition 9 is sandwiched between the long leg plate and the short leg plate to provide a solid support for the U-shaped pressure plate 1, increase the rigidity and strength of the U-shaped pressure plate 1, and prevent deformation and crushing under high pressure or high load.

[0057] A connecting hole is provided on the reinforcing partition 9, which is used to receive the rotating shaft 4 so that the rotating shaft 4 can pass through the reinforcing partition 9. Preferably, the rotating shaft 4 is normally connected to the connecting hole, and the reinforcing partition 9 provides support for the rotating shaft 4 to ensure the stability of the rotation of the rotating shaft 4.

[0058] A limiting hole is provided on the panel, which is aligned with the connection hole on the reinforcing partition 9 and is used to fix the position of the rotating shaft 4 and limit the movement of the rotating shaft 4, which has only one degree of freedom of rotation, to ensure the precise positioning of the rotating shaft 4, thereby ensuring the reliability and durability of the clamping mechanism.

[0059] In a preferred embodiment, the connecting hole is an elongated hole whose long axis is perpendicular to the long leg plate, and the horizontal position of the connecting hole and the rotating shaft 4 is adjustable to adjust the distance that the long leg plate is separated from the filter 14 .

[0060] In a specific embodiment, the reinforcing partition 9 is perpendicular to the long leg plate, the connecting hole is a long strip hole, the long axis of the long strip hole is perpendicular to the long leg plate, and the rotating shaft 4 can move along the length direction in the long strip hole, so that the horizontal position of the rotating shaft 4 relative to the long leg plate can be adjusted, thereby changing the pressure point where the long side of the cam mechanism contacts the long leg plate, thereby adjusting the distance that the long leg plate is separated from the filter 14, ensuring that the rotating shaft 4 can provide the necessary adjustment function while transmitting power.

[0061] When the filter 14 is pressed, the long foot is gradually brought closer to the filter 14 by the ability of the pressing mechanism until the required sealing pressure is reached. When the filter 14 needs to be released or replaced, the long foot can be gradually separated from the filter 14 by adjusting the position of the rotating shaft 4, thereby easily removing the filter 14. By precisely controlling the distance between the long foot and the filter 14, the optimal removal clearance of the filter 14 can be ensured, preventing the long foot and the filter 14 from colliding or rubbing during the removal process; at the same time, after the cam end is rubbed, fine-tuning can be performed without disassembling the entire pressing device to compensate for the difference in the position change of the cam end due to wear, thereby ensuring the accurate removal distance between the long foot and the filter 14; the U-shaped pressing plate 1 can adapt to filters 14 of different sizes, and is flexible and reliable to use.

[0062] Based on the above-mentioned specific embodiments, the cam mechanism is an elliptical cam mechanism 8. When the rotating shaft 4 drives the elliptical cam mechanism 8 to rotate until the long side of the cam mechanism abuts against the long foot plate, the U-shaped pressure plate 1 moves the largest distance to the side away from the sealing surface 13, and the long side end of the elliptical cam mechanism 8 has a plane in contact with the long foot plate.

[0063] In one specific embodiment, the outer contour of the elliptical cam mechanism 8 is composed of an elliptical line and a tangent circle. This design allows for a continuous and smooth change from the minimum outer radius to the maximum outer radius within a 90-degree rotation of the rotating shaft 4. This change allows the stroke of the clamping device to be flexibly adjusted to accommodate different clamping requirements. The elliptical cam mechanism 8 provides a maximum to minimum stroke of the clamping device within a 90-degree range, allowing the clamping function to be achieved with a simple rotation of the rotating shaft 4, ensuring precise position control of the U-shaped pressure plate 1 during the clamping and release processes.

[0064] Rotating shaft 4 is connected to the cam mechanism. When rotating shaft 4 rotates, it drives the cam mechanism to rotate. As the cam mechanism rotates, its long side gradually abuts the long leg, thereby pushing the U-shaped pressure plate 1 to move. When the long side of the cam mechanism fully abuts the long leg, the U-shaped pressure plate 1 moves to its maximum distance away from the sealing surface 13. This position is the release position, allowing the filter 14 to be easily inserted or removed. The large distance between the U-shaped pressure plate 1 and the filter 14 improves the convenience of filter 14 replacement.

[0065] The cam mechanism's long end features a flat surface, while the oval cam's tip is ground flat, providing a stable contact point. This design, coupled with spring force, creates a self-locking mechanism, ensuring the cam mechanism maintains its position and pushes the long leg firmly.

[0066] Based on the above embodiment, the elliptical cam mechanism 8, through its unique design and flexible control method, achieves precise control of the U-shaped pressure plate 1, thereby efficiently pressing and releasing the filter 14. This design not only improves the efficiency of filter 14 replacement, but also ensures the sealing and reliability between the filter 14 and the housing.

[0067] Based on the above-mentioned specific embodiments, the U-shaped pressure plate 1 and the second end of the rotating shaft 4 extend to the back plate of the shell, and the rotating shaft 4 is provided with at least two sets of cam mechanisms and two sets of clamping mechanisms to respectively clamp the front and rear of the filter 14.

[0068] In one specific embodiment, the U-shaped pressure plate 1 and the rotating shaft 4 extend through the front and back panels of the housing. At least one set of cam mechanisms and a clamping mechanism are disposed at the front end of the U-shaped pressure plate 1 and the rotating shaft 4, and one set of cam mechanisms and a clamping mechanism are disposed at the rear end of the U-shaped pressure plate 1 and the rotating shaft 4, respectively clamping the front and rear portions of the filter 14. Using one set of U-shaped pressure plate 1 and the rotating shaft 4 to simultaneously control multiple sets of cam mechanisms and clamping mechanisms achieves synchronized compression and release of the front and rear portions of the filter 14, helping to maintain a tight seal between the filter 14 and the housing, preventing air or liquid leakage, and thereby improving the reliability of the entire filtration system.

[0069] Based on the above embodiment, linkage is achieved through the cam mechanism and the clamping mechanism on the same set of U-shaped pressure plates 1 and the rotating shaft 4, ensuring that the filter 14 is clamped or released at the same time on the same horizontal plane, which helps to maintain the stability and synchronization of the movement of the filter 14; since multiple clamping points can be controlled at the same time, the time and labor intensity required for replacing the filter 14 are reduced, the filter 14 can be quickly replaced, and the efficiency of maintenance and operation is improved; since the front and rear clamping mechanisms work at the same time, the pressure on the filter 14 can be more evenly distributed, reducing the risk of poor sealing or damage to the filter 14 due to uneven pressure; using a set of U-shaped pressure plates 1 and the rotating shaft 4 to control multiple sets of cam mechanisms and clamping mechanisms can simplify the structural design, reduce the number of components required, and thus reduce manufacturing costs and maintenance complexity; since the front and rear clamping mechanisms work synchronously, the risk of filter 14 displacement or damage caused by operating each part separately can be reduced, thereby improving the stability of the entire system.

[0070] Based on the above specific embodiments, there are two sets of pressing devices, which respectively press the bottom and the top of the filter 14 .

[0071] In one specific embodiment, two sets of clamping devices are provided, each responsible for compressing a different portion of the filter 14. For example, two sets of clamping devices are provided for the top and bottom of the filter 14, respectively, allowing these two portions to be clamped independently. By providing independent clamping devices at the top and bottom of the filter 14, the sealing performance of the filter 14 and the reliability of the system are improved. This also provides convenient maintenance and operational flexibility, ensuring stable operation of the filtration system under various operating conditions. Precise sealing pressure control is performed on each portion of the filter 14 to accommodate different sealing requirements. By independently controlling the clamping force at the top and bottom, different sealing requirements can be more accurately met, ensuring the seal between the entire filter 14 and the housing. Providing separate clamping devices at the top and bottom of the filter 14 allows for more evenly distributed pressure on the filter 14. This uniform pressure distribution helps reduce the risk of poor sealing or damage to the filter 14 due to uneven pressure. The two sets of clamping devices provide a degree of redundancy; even if one fails, the other can still maintain basic sealing functionality. This redundant design improves the reliability of the entire filtration system. If one of the compression devices requires maintenance or fails, the other can maintain the seal of the filter 14, allowing maintenance to be performed without affecting the operation of the entire system.

[0072] On the basis of the above-mentioned specific embodiments, the driving mechanism is a motor connected to the first end of the rotating shaft 4, and the motors of the two sets of pressing devices rotate synchronously.

[0073] In practical applications, the two sets of clamping devices can operate synchronously or independently to meet different working conditions and requirements. For example, the synchronous movement of the two sets of clamping devices can be achieved by a motor connected to the first end of the rotating shaft 4, so that the bottom and top of the filter 14 are compressed or released simultaneously, ensuring the sealing between the entire filter 14 and the housing.

[0074] It should be noted that the motor, as a driving source, provides reliable power transmission, reducing errors caused by manual operation. Furthermore, the motor's stability and durability ensure the long-term and effective operation of the clamping device. The motor-driven clamping device can be easily integrated into automated systems, automating the filter 14 replacement and clamping processes, improving efficiency and safety.

[0075] Based on the above-mentioned specific embodiments, the driving mechanism is a handle 12 connected to the first end of the rotating shaft 4. When the long side of the cam mechanism is in contact with the long foot plate, the handle 12 is in a non-blocking position of the shell opening; when the long side of the cam mechanism is not in contact with the long foot plate, the handle 12 is in a blocking position of the shell opening.

[0076] In one embodiment, the clamping mechanism can be manually driven, using a handle 12 connected to the first end of the rotating shaft 4 to achieve compression and release of the U-shaped clamping plate 1. Handle 12 is directly connected to the first end of the rotating shaft 4. The operator can control the rotation of the rotating shaft 4 by rotating handle 12, thereby actuating the cam mechanism and the clamping mechanism. This design allows the operator to manually adjust the clamping force as needed and is suitable for applications requiring frequent manual operation.

[0077] The position of the handle 12 is designed for ease of operation. When the long side of the cam mechanism contacts the long foot plate, the long foot plate is separated from the filter 14, and the handle 12 is in a non-blocking position relative to the housing opening, that is, the handle 12 is horizontal and the handle 12 and the housing opening do not overlap, and the clamping device is in a loosened, filter 14-replacement state, the filter 14 can be pulled out. When the long side of the cam mechanism is not in contact with the long foot plate, the long foot plate presses the filter 14, and the handle 12 is in a blocking position relative to the housing opening, that is, the handle 12 is vertical and blocks the housing opening, the handle 12 can just prevent the filter 14 from being pulled out.

[0078] This manually actuated clamping device has a built-in protection against misoperation. The position of handle 12 helps prevent misoperation, ensuring that filter 14 does not move outward due to misoperation while in the clamped state, thus ensuring operational safety. Manual rotation of shaft 4 is simple in structure, low in cost, and independent of external power, making maintenance relatively simple.

[0079] Based on the above embodiments, a fitting judgment mechanism is further included to judge whether the filter 14 fits the sealing surface 13. The fitting judgment mechanism includes:

[0080] Multiple distance sensors provided at each corner of the sealing surface 13 for detecting the distance between the sealing surface 13 and the filter 14;

[0081] A first fitting control unit connected to the distance sensors is used to control the driving mechanism to stop running when all the distance sensors detect that the distance between the sealing surface 13 and the filter 14 is zero.

[0082] In practice, the fit determination mechanism is an automated detection system used to ensure proper fit between the filter 14 and the sealing surface 13. This system includes multiple distance sensors and a first fit control unit. The distance sensors are located at each corner of the sealing surface 13 to detect the distance between the sealing surface 13 and the filter 14. These sensors enable the system to determine whether the filter 14 is properly placed on the sealing surface 13.

[0083] The first fitting control unit is connected to all the distance sensors, receives signals from the sensors, and determines whether the filter 14 is fully fitted to the sealing surface 13. When all the distance sensors detect that the distance between the sealing surface 13 and the filter 14 is zero, the filter 14 is determined to be fully fitted, and the first fitting control unit controls the drive mechanism to stop operation.

[0084] Based on the above embodiment, the fit judgment mechanism can automatically detect whether the filter 14 has been correctly installed, reducing the need for manual inspection and improving the safety and reliability of the system.

[0085] Based on the above specific embodiments, the fitting judgment mechanism further includes:

[0086] A pressure sensor installed on each corner contact surface of the sealing surface 13 and the filter 14 to detect the pressure between the sealing surface 13 and the filter 14;

[0087] A second fitting control unit connected to the pressure sensors is used to control the driving mechanism to stop running when all the pressure sensors detect that the pressures between the sealing surface 13 and the filter 14 are equal.

[0088] In actual application, the fit judgment mechanism is to ensure that the filter 14 and the sealing surface 13 fit correctly and maintain the required pressure throughout the operation. The fit judgment mechanism includes a pressure sensor and a second fit control unit. The pressure sensor is also installed on each corner contact surface of the sealing surface 13 and the filter 14 to detect the pressure between the sealing surface 13 and the filter 14. These sensors ensure that the pressure on the entire sealing surface 13 is evenly distributed after the filter 14 is fitted. The second fit control unit is connected to the pressure sensor and monitors the data of all pressure sensors. When all pressure sensors detect that the pressure between the sealing surface 13 and the filter 14 is equal, it means that the pressure has been evenly distributed, and the control unit will control the drive mechanism to stop running to ensure that it is not over-pressurized, thereby avoiding possible damage or leakage.

[0089] Based on the above embodiment, the fit determination mechanism can ensure the correct installation and sealing of the filter 14. By monitoring the distance and pressure in real time, the safety and reliability of the filtration system are improved, while the need for manual inspection is reduced, ensuring the sealing of the filter 14 during the compression process, and preventing leakage or other problems caused by improper installation.

[0090] Based on the clamping device for the bag-in-bag-out filter provided in the above-mentioned embodiments, the present invention further provides a bag-in-bag-out filter, which includes a clamping device for the bag-in-bag-out filter, wherein the clamping device for the bag-in-bag-out filter is any of the clamping devices in the above-mentioned embodiments. Because the bag-in-bag-out filter utilizes the clamping device in the above-mentioned embodiments, the beneficial effects of the bag-in-bag-out filter can be described in detail in the above-mentioned embodiments. The structures of the other components of the bag-in-bag-out filter can be described in detail in this document.

[0091] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0092] The above is a detailed introduction to the clamping device for the bag-in-bag-out filter provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A compacting device for bag-in-bag-out filter, characterized in that: A U-shaped pressure plate (1) is arranged parallel to the opposite side of the sealing surface (13) of the shell, including a pair of long legs and short legs, and a rotating shaft (4) arranged between the long legs and the short legs along the length direction of the U-shaped pressure plate (1), the first end of the rotating shaft (4) extends out of the panel of the shell to connect to a driving mechanism for driving it to rotate, the long legs are farther away from the sealing surface (13) than the short legs, and the long legs and the filter have overlapping projections on the projection of the sealing surface (13); and also includes a cam mechanism connected to the rotating shaft (4) for driving the U-shaped pressure plate (1) to move to the side away from the sealing surface (13), and a pressing mechanism connected to the U-shaped pressure plate (1) for causing the long legs to press the filter.

2. The pressing device for bag-in-bag-out filter according to claim 1, characterized in that: A large through hole is provided on the long foot plate, and a small through hole is provided on the short foot plate. The axes of the large through hole and the small through hole coincide to form a through hole of the U-shaped pressure plate (1). The clamping mechanism includes a bolt (7) sleeved in the through hole and a preload spring (3) sleeved on the bolt (7). One end of the bolt (7) is connected to the fixing seat (10) of the shell, and the other end is provided with a positioning piece (5) on the outside of the long foot plate. The diameters of the preload spring (3) and the positioning piece (5) are between the large through hole and the small through hole. One end of the preload spring (3) abuts against the short foot plate, and the other end passes through the large through hole and abuts against the positioning piece (5).

3. The pressing device for bag-in-bag-out filter according to claim 2, characterized in that: The short foot plate is provided with a positioning sleeve (2) facing the long foot plate at the small through hole, and the pre-compression spring (3) is sleeved on the positioning sleeve (2).

4. The pressing device for bag-in-bag-out filter according to claim 1, characterized in that: A plurality of groups of reinforcing partitions (9) are connected between the long foot plate and the short foot plate. The reinforcing partitions (9) are perpendicular to the long foot plate. The reinforcing partitions (9) are provided with connecting holes. The panel is provided with limiting holes. The rotating shaft (4) is connected to the connecting holes and the limiting holes.

5. The pressing device for bag-in-bag-out filter according to claim 1, characterized in that: The cam mechanism is an elliptical cam mechanism (8), and when the rotating shaft (4) drives the elliptical cam mechanism (8) to rotate until the long side of the cam mechanism abuts against the long foot plate, the U-shaped pressure plate (1) moves the longest distance to the side away from the sealing surface (13), and the long side end of the elliptical cam mechanism (8) has a plane in contact with the long foot plate.

6. The pressing device for bag-in-bag-out filter according to claim 1, characterized in that: The U-shaped pressure plate (1) and the second end of the rotating shaft (4) extend to the back plate of the housing, and the rotating shaft (4) is provided with at least two groups of cam mechanisms and two groups of pressing mechanisms, which respectively press the front and rear of the filter; There are two sets of pressing devices, which respectively press the bottom and the top of the filter.

7. The pressing device for bag-in-bag-out filter according to claim 6, characterized in that: The driving mechanism is a motor connected to the first end of the rotating shaft (4), and the motors of the two sets of the pressing devices rotate synchronously.

8. The pressing device for bag-in-bag-out filter according to claim 6, characterized in that: The driving mechanism is a handle (12) connected to the first end of the rotating shaft (4); when the long side of the cam mechanism contacts the long foot plate, the handle (12) is in a non-blocking position of the shell opening; when the long side of the cam mechanism is not in contact with the long foot plate, the handle (12) is in a blocking position of the shell opening.

9. The pressing device for bag-in-bag-out filter according to any one of claims 1 to 8, characterized in that: It also includes a fitting judgment mechanism for judging whether the filter and the sealing surface (13) are fitted together, and the fitting judgment mechanism includes: a plurality of distance sensors provided at each corner of the sealing surface (13) for detecting the distance between the sealing surface (13) and the filter; A first fitting control unit connected to the distance sensor and used to control the driving mechanism to stop operating when all the distance sensors detect that the distance between the sealing surface (13) and the filter is zero.

10. The pressing device for bag-in-bag-out filter according to claim 9, characterized in that: The fitting judgment mechanism further includes: a pressure sensor mounted on the contact surface between the sealing surface (13) and each corner of the filter and used to detect the pressure between the sealing surface (13) and the filter; A second fitting control unit connected to the pressure sensor and used to control the driving mechanism to stop operating when all the pressure sensors detect that the pressures between the sealing surface (13) and the filter are equal.

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