Pressing device for bag-in and bag-out filter

Abstract

The invention discloses a pressing device for a bag inlet and outlet filter, which is applied to the technical field of ventilation safety protection equipment, is arranged in parallel 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 invention 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] Biosafety has been incorporated into the national security system to comprehensively enhance the country's biosafety governance capabilities. Filters can filter out pathogenic microorganisms, dust and other harmful substances. Bag-in-bag-out filters are special high-efficiency ventilation safety protection equipment for high-biological risk facilities and are an important part of biosafety facilities. They filter out highly pathogenic microorganisms transmitted by aerosols in the air, filter and intercept them in the system pipeline, prevent the spillage of pathogenic microorganisms, and protect the safety of personnel and the surrounding environment. The filter clamping device is the most important component of the bag-in-bag-out filter, and its working reliability directly affects the safe operation of the equipment.

[0003] The existing filter clamping mechanism mostly adopts a planar four-bar linkage. Although this mechanism has a simple structure, it has some significant problems. Due to the large clearance between the pins at the connection between the connecting rods, the connection may become loose after long-term use, resulting in a larger movement of the connecting rod. This will cause the strokes on both sides of the clamping surface connecting rod to be inconsistent, which will lead to uneven force on the clamping surface of the clamping mechanism. This uneven force will affect the sealing effect and easily cause polluted gas to leak outdoors, thereby threatening the safety of the surrounding environment.

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

[0005] The clamping force after the mechanical linkage mechanism is self-locked is only related to the fixed clamping stroke. The existing filter sealing surface sealing materials are mostly made of polyurethane foam materials. After long-term use, due to high temperature, fatigue and other reasons, they cannot maintain their original elasticity, resulting in compaction of the filter sealing material and thinning of the thickness. Since the clamping stroke remains unchanged after the mechanical structure is self-locked, the clamping force drops sharply, resulting in a poor sealing effect and reduced sealing safety and stability.

[0006] In summary, how to effectively solve the problems of loose sealing of the sealing surface of the existing filter pressing mechanism, causing leakage of polluted gas and threatening the safety of the surrounding environment is an issue that technical personnel in this field urgently need to solve. Summary of the invention

[0007] The object of the present invention is to provide a clamping device for a bag-in-bag-out filter, which utilizes the relationship between a cam mechanism and a clamping mechanism to achieve a stable, reliable and tight fit between the filter and a 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 is arranged in parallel opposite to the sealing surface of the filter housing, comprising a U-shaped pressing plate with a pair of long legs and a short leg, and a rotating shaft arranged between the long legs and the short legs along the length direction of the U-shaped pressing plate, wherein 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 pressing plate to move to the side away from the sealing surface, and a clamping mechanism connected to the U-shaped pressing 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 with each other to form a through hole of the U-shaped pressure plate, and the clamping mechanism includes a bolt sleeved in the through hole and a pre-stressed spring sleeved on the bolt, one end of the bolt is connected to a fixing seat of the shell, and the other end is provided with a positioning plate on the outside of the long foot plate, the diameters of the pre-stressed spring and the positioning plate are between the large through hole and the small through hole, one end of the pre-stressed spring abuts against the short foot plate, and the other end passes through the large through hole and abuts against the positioning plate.

[0011] Optionally, the short foot plate is provided with a positioning sleeve facing the long foot plate at the small through hole, and the preload spring is sleeved on the positioning sleeve.

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

[0013] Optionally, the cam mechanism is an elliptical cam mechanism, and 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 maximum 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 pressing 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 groups of the cam mechanisms and two groups of the pressing mechanisms to respectively press the front and rear of the filter;

[0015] The number of the pressing devices is two sets, 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 clamping devices rotate synchronously.

[0017] Optionally, the driving mechanism is a handle connected to the first end of the rotating shaft, and when the long side of the cam mechanism is in contact with 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 disposed at each corner of the sealing surface for detecting the distance between the sealing surface and the filter;

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

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

[0022] A pressure sensor installed 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 connected to the pressure sensor and used for controlling 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 beneficial effect of the present invention is that the U-shaped pressing plate is composed of a pair of long foot plates and short foot plates, the short foot plates are close to the sealing surface, the long foot plates are farther away from the sealing surface than the short foot plates, and the long foot plates and the filter form overlapping projections on the projection of the sealing surface, so as to achieve the pressing effect of the long foot plates pressing the filter. The rotating shaft is arranged along the length direction of the U-shaped pressing plate, the rotating shaft is located between the long foot plates and the short foot plates, and the first end of the rotating shaft extends out of the panel of the housing so as to connect the driving mechanism driving it to rotate. The cam mechanism is connected to the rotating shaft, and the rotation of the rotating shaft drives the cam mechanism to rotate. The cam mechanism has a short side and a long side, and the short side is smoothly connected to the long side, so that the rotation radius of the cam mechanism is different. The rotation radius of the short side is smaller than the distance between the rotating shaft and the long foot plates, and the rotation radius of the long side is larger than the distance between the rotating shaft and the long foot plates. When the cam rotates until the long side abuts against the long foot plates, the U-shaped pressing plate is driven to move to the side away from the sealing surface, so that the long foot plates are separated from the filter, that is, the pressing device is separated from the filter, and the filter can be freely moved out. The clamping mechanism is connected to the U-shaped clamping plate, and the clamping mechanism drives the long foot plate to press against one side of the sealing surface. When the long side is not in contact with the long foot plate, the long foot plate presses the filter under the clamping force of the clamping mechanism, thereby making the filter fit tightly against the sealing surface.

[0025] The clamping device for bag-in-bag-out filter provided by the present invention rotates the rotating shaft through the driving mechanism, thereby driving the cam mechanism to rotate. The rotation of the cam mechanism pushes the long foot plate and the short foot plate of the U-shaped pressure plate to compress or loosen the filter; the clamping force can be adjusted to achieve rapid filter replacement, while ensuring that the sealing between the filter and the sealing surface of the housing will not be affected during the filter replacement process, 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0027] FIG1 is a schematic structural diagram of a clamping device for a bag-in-bag-out filter provided in a specific embodiment of the present invention;

[0028] FIG2 is a cross-sectional view of a clamping device for a bag-in-bag-out filter;

[0029] FIG3 is a diagram showing the use of a clamping device for a bag-in-bag-out filter;

[0030] FIG4 is a diagram of the non-pressing state of the pressing device;

[0031] FIG. 5 is a diagram showing the clamping state of the clamping device.

[0032] Reference numerals:

[0033] 1-U-shaped pressure plate, 2-positioning sleeve, 3-pre-stress spring, 4-rotating shaft, 5-positioning plate, 6-tensioning 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 present invention is to provide a clamping device for a bag-in-bag-out filter. The clamping device for a bag-in-bag-out filter utilizes the relationship between a cam mechanism and a clamping mechanism to achieve a 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0036] Please refer to Figures 1 to 5, Figure 1 is a structural schematic diagram of a clamping device for a bag-in-bag-out filter provided by a specific embodiment of the present invention; Figure 2 is a cross-sectional view of the clamping device for the bag-in-bag-out filter; Figure 3 is a usage state diagram of the clamping device for the bag-in-bag-out filter; Figure 4 is a non-clamping state diagram of the clamping device; and Figure 5 is a clamping state diagram 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 in parallel opposite to the sealing surface 13 of the filter 14 shell, 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 shell 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 to the side away from the sealing surface 13, and a clamping mechanism connected to the U-shaped pressure plate 1 for the long legs to press the filter 14.

[0038] In the above structure, the pressing device of the bag-in-bag-out filter is arranged parallel to the opposite side of the housing sealing surface 13, and is used to make the filter 14 fit closely with the housing sealing surface 13, so as to ensure 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 pressing plate 1 is composed of a pair of long foot plates and short foot plates, wherein the short foot plates are close to the sealing surface 13, while the long foot plates are relatively far away from the sealing surface 13. This design makes the opening of the U-shaped pressing plate 1 face the side close to the sealing surface 13, and no matter whether the clamping device is located at the bottom or the top, the opening direction of the U-shaped pressing plate 1 is corresponding to its position, that is, the opening is upward at the bottom and downward at the top.

[0040] The projection of the long foot plate and the filter 14 on the sealing surface 13 can form a coincident projection, which means that the long foot plate can evenly press the filter 14, thereby achieving effective sealing. By ensuring good contact between the long foot plate and the sealing surface 13, gas leakage caused by uneven pressure or poor sealing can be avoided, which is crucial to maintaining environmental safety and improving filtration efficiency.

[0041] The rotating shaft 4 is arranged along the length direction of the U-shaped pressing plate 1, between the long foot plate and the short foot plate, and more preferably at the center of the two. This layout can ensure uniform distribution of force, thereby providing balanced force when pressing the filter 14. The first end of the rotating shaft 4 extends out of the panel of the housing so as to be connected to an external driving mechanism, such as a motor or a manual handle 12, to drive it to rotate.

[0042] The rotating shaft 4 rotates flexibly between the long leg plate and the short leg plate of the U-shaped pressing plate 1, which is achieved by the cooperation between the rotating shaft 4 and the connecting hole on the reinforcing partition plate 9 and the limiting hole on the panel. This design allows the rotating shaft 4 to provide necessary adjustment functions while transmitting power.

[0043] The cam mechanism is connected to the rotating shaft 4 through a square shaft. The square hole of the cam mechanism is connected to the square shaft on the rotating shaft 4, and the cam mechanism rotates with the rotating shaft 4, while preventing the cam mechanism from rotating circumferentially relative to the rotating shaft 4, thereby realizing the circumferential positioning of the cam mechanism relative to the rotating shaft 4 and ensuring that the relative positions of the two are fixed. In order to further ensure the stability of the cam mechanism, a plug hole is provided on the rotating shaft 4 and the cam mechanism, and a plug is connected to the plug hole through a pin, thereby realizing the axial positioning of the cam mechanism relative to the rotating shaft 4 and preventing the cam mechanism from moving in the axial direction. Through axial and circumferential positioning, the cam mechanism is firmly fixed on the rotating shaft 4, preventing any movement or rotation relative to the rotating shaft 4, and ensuring the stability and reliability of the mechanism.

[0044] The present application utilizes the rotation of the cam mechanism to control the opening and closing action of the U-shaped pressure plate 1, thereby achieving the compression and release of the filter 14. Specifically, the cam mechanism has a short side and a long side, and the two parts are smoothly connected, so that the radius of the cam changes during the rotation process. This design allows the cam mechanism to have different contact points with the long foot plate of the U-shaped pressure plate 1 when rotating, 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 foot plate, which means that when this part of the cam rotates, it will not contact the long foot plate. On the contrary, the rotation radius of the long side is larger than the distance between the rotating shaft 4 and the long foot plate, so that the long side can contact the long foot plate when it rotates to a specific position. When the cam rotates to the position where the long side abuts against the long foot plate, it drives the U-shaped pressure plate 1 to move to the side away from the sealing surface 13. This action causes the long foot plate to separate from the filter 14, thereby disengaging the clamping device from the filter 14 and allowing the filter 14 to move out freely.

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

[0047] The clamping device for the bag-in-bag-out filter provided by the present invention provides a reliable, accurate and easy-to-operate clamping mechanism to ensure the sealing between the filter 14 and the housing, prevent leakage, make the clamping and release of the filter 14 simple and quick, and improve 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 of the rotation radius of the cam mechanism is used to control the position of the U-shaped pressing plate 1, so as to realize the opening and closing action of the U-shaped pressing plate 1, and realize 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, and improves the efficiency and reliability of the operation. Accurate clamping force can be achieved through the clamping mechanism. This precise control helps to prevent excessive or insufficient clamping of the filter 14, and ensures 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 outer side 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 a specific embodiment, the clamping mechanism is a carefully designed mechanical structure for ensuring the tightness between the bag-in-bag-out filter and the housing. The clamping mechanism can be spring-loaded to prevent over-clamping. This design can provide 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 to further improve the safety of the filter 14. The ratchet mechanism can ensure that the clamping device will not be accidentally released during the clamping process, thereby enhancing the reliability of the entire system.

[0050] Exemplarily, the clamping mechanism includes a bolt 7 and a preload 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 fixed seat 10 of the shell, and can be specifically fastened to the fixed seat 10 by a fixing nut 11, and the fixing nut 11 is welded to the box fixed 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 preload spring 3 is sleeved on the bolt 7, and the bolt 7 is a guide rod of the preload spring 3. When the U-shaped pressure plate 1 moves freely along the bolt 7, the preload 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 plate 5. The positioning plate 5 is used to limit the movement of the preload spring 3. The large through hole can pass through the positioning plate 5. The preload spring 3 provides a preload force between the positioning plate 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 foot plate, 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, drives the cam mechanism to rotate, and pushes the U-shaped pressure plate 1 to move, so that the long foot plate 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 to prevent 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 clamping nut 6. In order to ensure the consistency of the clamping force, the stroke lengths of all spring clamping nuts 6 need to be adjusted to be consistent. By ensuring the consistency of the clamping force of all springs, the problem of 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 preload spring 3 to provide a stable preload 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 foot plate is provided with a positioning sleeve 2 facing the long foot plate at the small through hole, and the pre-stress spring 3 is sleeved on the positioning sleeve 2. The positioning sleeve 2 provides a stable installation foundation for the pre-stress spring 3 and has a guiding effect on the pre-stress spring 3, ensuring that the pre-stress spring 3 can be stably and smoothly extended and retracted.

[0055] Based on the above-mentioned specific embodiments, several groups of reinforced partitions 9 are connected between the long foot plates and the short foot plates. The reinforced partitions 9 are perpendicular to the long foot plates. Connecting holes are provided on the reinforced partitions 9. 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 foot plate and the short foot 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, and the connecting hole 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] The panel is provided with a limiting hole, which is aligned with the connecting 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, with 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 foot plate, and the horizontal position of the connecting hole and the rotating shaft 4 is adjustable to adjust the distance of the long foot plate away from the filter 14 .

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

[0061] When the filter 14 is pressed, the long foot plate is gradually brought close 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 plate can be gradually separated from the filter 14 by adjusting the position of the rotating shaft 4, so that the filter 14 can be easily removed. By accurately controlling the distance between the long foot plate and the filter 14, the optimal removal clearance of the filter 14 can be ensured to prevent the long foot plate from colliding and rubbing with the filter 14 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 plate 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 maximum 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 a specific embodiment, the outer contour of the elliptical cam mechanism 8 is composed of an elliptical line and a tangent circle. This design allows a continuous and smooth change from the minimum outer circle radius to the maximum outer circle radius within a range of 90 degrees of rotation of the rotating shaft 4. This change allows the stroke of the clamping device to be flexibly adjusted to meet different clamping requirements. The elliptical cam mechanism 8 provides a maximum to minimum stroke of the clamping device within a range of 90 degrees, so that the clamping function can be achieved by simply rotating the rotating shaft 4, ensuring that the position control of the U-shaped clamping plate 1 during the clamping and releasing process is accurate.

[0064] The rotating shaft 4 is connected to the cam mechanism. When the rotating shaft 4 rotates, the cam mechanism is driven to rotate. During the rotation of the cam mechanism, its long side gradually abuts against the long foot plate, thereby pushing the U-shaped pressure plate 1 to move. When the long side of the cam mechanism completely abuts against the long foot plate, the U-shaped pressure plate 1 will move to the side away from the sealing surface 13 to the maximum distance. 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 replacing the filter 14.

[0065] The cam mechanism is designed with a flat surface at the end of the long side, and the tip of the oval cam is ground flat to provide a stable contact point. Under the action of spring force, this design can realize a self-locking function, ensuring that when the cam mechanism is rotated into place, it can stably push the long foot plate.

[0066] Based on the above embodiment, the elliptical cam mechanism 8 achieves precise control of the U-shaped pressure plate 1 through its unique design and flexible control method, so as to efficiently press and release the filter 14. This design not only improves the efficiency of replacing the filter 14, 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 shaft 4 extend to the back plate of the shell, and the shaft 4 is provided with at least two groups of cam mechanisms and two groups of clamping mechanisms to respectively clamp the front and rear of the filter 14.

[0068] In a specific embodiment, the U-shaped pressing plate 1 and the rotating shaft 4 penetrate the front panel and the back panel of the housing, at least one set of cam mechanisms and a clamping mechanism are arranged at the front end of the U-shaped pressing plate 1 and the rotating shaft 4, and one set of cam mechanisms and a clamping mechanism are arranged at the rear end of the U-shaped pressing plate 1 and the rotating shaft 4, respectively clamping the front and rear of the filter 14. Using one set of U-shaped pressing plates 1 and the rotating shaft 4 to simultaneously control multiple sets of cam mechanisms and clamping mechanisms to achieve synchronous clamping and release of the front and rear of the filter 14 helps to maintain the sealing between the filter 14 and the housing, prevent air or liquid leakage, and thus improve the reliability of the entire filtering system.

[0069] Based on the above embodiment, linkage is achieved through the cam mechanism and the clamping mechanism on the same group 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 maintenance and operation efficiency are 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 group of U-shaped pressure plates 1 and the rotating shaft 4 to control multiple groups 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 individually 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 press the bottom and the top of the filter 14 respectively.

[0071] In a specific embodiment, there are two sets of clamping devices, each set is responsible for clamping different parts of the filter 14, for example, two sets of clamping devices are responsible for the top and bottom of the filter 14 respectively, so that the two parts can be clamped independently. By arranging 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. At the same time, it also provides the convenience of maintenance and the flexibility of operation, ensuring the stable operation of the filtration system under various working conditions. Accurate sealing pressure control is performed on each part of the filter 14 to adapt to different sealing requirements. By independently controlling the clamping force of the top and bottom, it can more accurately adapt to different sealing requirements and ensure the sealing between the entire filter 14 and the housing. Arranging clamping devices at the top and bottom of the filter 14 respectively can more evenly distribute the pressure on the filter 14. This uniform pressure distribution helps to reduce the risk of poor sealing or damage to the filter 14 caused by uneven pressure. The two sets of clamping devices provide a certain degree of redundancy, and even if one of them fails, the other can still maintain basic sealing functions. This redundant design improves the reliability of the entire filtration system. If one set of the clamping devices requires maintenance or fails, the other set can maintain the seal of the filter 14, allowing maintenance without affecting the operation of the overall 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 clamping devices rotate synchronously.

[0073] In practical applications, the two sets of clamping devices can be operated 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 at the same time, 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 and reduces errors caused by manual operation. In addition, the stability and durability of the motor ensure the long-term effective operation of the clamping device. The motor-driven clamping device can be easily integrated into the automation system to realize the automation of the filter 14 replacement and clamping process, 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 a specific embodiment, the clamping device can be manually driven to achieve the clamping and releasing of the U-shaped clamping plate 1 through a handle 12 connected to the first end of the rotating shaft 4. The handle 12 is directly connected to the first end of the rotating shaft 4, and the operator can control the rotation of the rotating shaft 4 by rotating the handle 12, thereby driving the cam mechanism and the clamping mechanism. This design allows the operator to manually adjust the clamping force as needed, and is suitable for occasions that require frequent manual operation.

[0077] The position design of the handle 12 takes into account the convenience 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 located in the non-blocking position of the shell opening, that is, the direction of the handle 12 is in a horizontal state and the handle 12 and the shell opening do not overlap, and the clamping device is in a state of loosening and replacing the filter 14, 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 located in the blocking position of the shell opening, that is, the direction of the handle 12 is in a vertical state and the handle 12 blocks the shell opening, the handle 12 can just prevent the filter 14 from being pulled out.

[0078] When the clamping device is manually driven, the device has a function of preventing misoperation. The position design of the handle 12 helps to prevent misoperation, so as to ensure that the filter 14 will not move outward due to misoperation when it is clamped, thereby ensuring the safety of operation. Manually rotating the shaft 4 has a simple structure, low cost, does not rely on external energy, and is relatively simple to maintain.

[0079] On the basis of the above-mentioned specific embodiments, a fitting judgment mechanism is further included for judging whether the filter 14 fits the sealing surface 13. The fitting judgment mechanism includes:

[0080] A plurality of distance sensors disposed 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 practical applications, the fit judgment mechanism is an automated detection system for ensuring that the filter 14 fits correctly with the sealing surface 13. This system includes a plurality of distance sensors and a first fit control unit, wherein the distance sensors are arranged at each corner of the sealing surface 13 to detect the distance between the sealing surface 13 and the filter 14. Through these sensors, the system can know whether the filter 14 has been correctly 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 completely fitted with the sealing surface 13. When all the distance sensors detect that the distance between the sealing surface 13 and the filter 14 is zero, it is determined that the filter 14 is completely fitted, and the first fitting control unit controls the driving mechanism to stop operating.

[0084] Based on the above embodiment, the fit judgment mechanism can automatically detect whether the filter 14 has been correctly installed, thereby 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 sensor 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 during the entire 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 to monitor 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 judgment mechanism can ensure the correct installation and sealing of the filter 14. By real-time monitoring of distance and pressure, the safety and reliability of the filtration system are improved, while reducing the need for manual inspection, 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 embodiment, the present invention also 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 one of the clamping devices in the above embodiment. Since the bag-in-bag-out filter adopts the clamping device in the above embodiment, please refer to the above embodiment for the beneficial effects of the bag-in-bag-out filter. Please refer to the prior art for the structures of other parts of the bag-in-bag-out filter, which will not be described in detail herein.

[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. Specific examples are used in this article 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 of the present invention and its core ideas. 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 range consistent with the principles and novel features disclosed herein.

Claims

1. A clamping device for a 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, comprising 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), wherein 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 a 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 against the filter.

2. The pressing device for bag-in-bag-out filter according to claim 1, characterized in that: The long foot plate is provided with a large through hole, and the short foot plate is provided with a small through hole. The axes of the large through hole and the small through hole coincide with each other to form a through hole of the U-shaped pressure plate (1). The clamping mechanism comprises 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 a fixing seat (10) of the shell, and the other end is provided with a positioning plate (5) on the outer side of the long foot plate. The diameters of the preload spring (3) and the positioning plate (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 plate (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 preload 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, and 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 pressing 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 groups of cam mechanisms and two groups of pressing mechanisms, which respectively press the front and rear of the filter; The number of the pressing devices is two sets, 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 clamping 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 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.

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 in fit, the fitting judgment mechanism comprising: A plurality of distance sensors provided at each corner of the sealing surface (13) and used to detect the distance between the sealing surface (13) and the filter; A first fitting control unit connected to the distance sensor and used for controlling 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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