Clamp system and filter mechanism and method

Abstract

A filter system and clamp system for a gas turbine air inlet uses a single clamp system that allows both a first element and a second element to be secured in place on a grid of a gas turbine air inlet. The clamp system can be released to allow servicing of the first filter element while the second filter element remains in sealing engagement with the grid.

Description

[0001] This application was filed on June 4, 2021 as a PCT international patent application and claims the benefit of priority to U.S. Provisional Patent Application Serial No. 63 / 035,412, filed June 5, 2020, and U.S. Non-Provisional Patent Application Serial No. 63 / 140,020, filed January 21, 2021, the entire disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] This disclosure relates to air filter systems. In some applications, this disclosure relates to air filters for the intake air of gas turbine systems, and to a clamping mechanism. A method is also provided. Background Technology

[0003] While this disclosure can be applied to a variety of applications, it was developed for use with gas turbine filter systems. Gas turbine systems are useful in power generation. These types of systems are convenient because they can be constructed quickly and they produce fewer harmful emissions than coal or oil. Gas turbines use air for combustion. Combustion air needs to be cleaned. To ensure clean air is used for combustion, air filters are used to clean the air brought into the gas turbine system.

[0004] Filters are used to purify the intake air for gas turbines. An example gas turbine intake system is disclosed in US 8,673,040, which is incorporated herein by reference.

[0005] The air filters used in these intake systems require periodic removal and replacement. A convenient system is desired that allows for quick and easy servicing of these air filters. Specifically, a system is desired in which a single clamping system can be used for both the first and second filters, allowing the second filter to remain sealed in place while the first filter is being serviced. Summary of the Invention

[0006] This disclosure provides a solution to problems in the prior art. For example, the solution provided herein allows a single clamp to seal both a first filter and a second filter to a support grille of a gas turbine's intake system, and also allows the second filter to remain in a sealed engagement with the support grille while the first filter is released for replacement. The clamp can also selectively release the second element for periodic removal and replacement.

[0007] In a first aspect, a clamping system is provided for releasably attaching a filter assembly to a support grid; the clamping system includes: (a) an elongated support member having: an open first end and an oppositely open second end; a first sliding channel adjacent to the first end; and a second sliding channel adjacent to the second end; (b) a first clamp slidably mounted in the open first end; (c) a second clamp slidably mounted in the open second end; (d) a first sliding pin mechanism slidably mounted in the first sliding channel between a locked position and a released position; (e) a second sliding pin mechanism slidably mounted in the second sliding channel between a locked position and a released position; and (f) an elongated omega-shaped clamp that can... The omega clamp is removably installed to cover the support member; the omega clamp has a spaced first through slot and a second through slot; (i) the first through slot slidably accommodates a portion of the first sliding pin mechanism; (ii) the second through slot slidably accommodates a portion of the second sliding pin mechanism; (g) a first pivot and a second pivot extending through and connecting the omega clamp and the support member; the first pivot and the second pivot each have a hinge point in the support member and a pivot axis along the length of the support member between the open first end and the open second end of the support member; wherein, when the first sliding pin mechanism and the second sliding pin mechanism slide to the release position, the omega clamp, together with the first pivot and the second pivot, pivots freely along the pivot axis away from the state of covering the support member.

[0008] The clamping system may further include a separate maintenance tool configured and arranged to engage each of the first pivot and the second pivot and apply an axial force to the omega clamp.

[0009] The maintenance tool may include: (a) a head defining a recess and a cam surface, the recess being sized to engage the first pivot and the second pivot, the cam surface being located on a portion of the head opposite to the recess; and (b) a gripping handle extending from the head.

[0010] Each of the first pivot and the second pivot includes a cylindrical nut located on the portion of these pivots opposite to the hinge point.

[0011] Each of the first clamp and the second clamp includes: (a) a sliding rod sized such that it is slidably received within one of an open first end and an open second end of the support member; (b) a post fixed to the sliding rod and perpendicular to the sliding rod; and (c) a flange fixed to a distal portion of the post and parallel to and facing the sliding rod to form a washer retaining recess between the flange and the sliding rod.

[0012] Each of the first sliding pin mechanism and the second sliding pin mechanism includes: (a) a pin slide bar sized such that it slides within one of the first sliding channel and the second sliding channel; (b) a support member fixed to and perpendicular to the pin slide bar; (c) a pin flange fixed to a distal portion of the support member and parallel to the pin slide bar, the pin flange having an inner side facing the pin slide bar and an opposite outer side; and (d) a pin projecting from the outer side, the pin being sized such that it slides within one of a first groove and a second groove in an omega-shaped clamp.

[0013] The omega-shaped clamp includes: (a) a base, wherein a pair of legs extend perpendicularly to the base; (i) the base defines the first through slot and the second through slot; (ii) the base has an outer side and an opposite inner side; (b) each of the legs bends away from the base at a non-zero angle and away from each other; the legs and the inner side of the base define an open channel; and (c) a first pin slider retainer and a second pin slider retainer, the first pin slider retainer and the second pin slider retainer being secured to the inner side of the base and overlapping a portion of the first through slot and the second through slot.

[0014] The omega-shaped clamp includes: (a) a base, wherein a pair of legs extend perpendicularly to the base; (i) the base defines a first through-slot and a second through-slot; (ii) the base has an outer side and an opposite inner side; (b) each of the legs bends away from the base at a non-zero angle and opposite to each other; the legs and the inner side of the base define an open channel; and (c) a first pin-slider retainer and a second pin-slider retainer, the first pin-slider retainer and the second pin-slider retainer being secured to the inner side of the base and overlapping a portion of the first through-slot and the second through-slot; (i) the The dimensions of the first and second pin-slider retainers are determined such that they slidably receive one of the pin flanges to place the first and second sliding pin mechanisms in these locked positions; and wherein, when the first and second sliding pin mechanisms slide to the release position, each of the pin flanges slides away from the first and second pin-slider retainers, and the omega-shaped clamp, together with the first and second pivots, pivots freely along the pivot axis away from the state covering the support member.

[0015] On the other hand, a clamping system is provided for releasably attaching a filter assembly to a support grid, the clamping system comprising: (a) a support member; (b) a first clamp and a second clamp slidably mounted at opposite ends of the support member; (c) a first sliding pin mechanism and a second sliding pin mechanism slidably mounted to a portion of the support member; and (d) an omega-shaped clamp removably mounted to cover the support member and slidably receive the first sliding pin mechanism and the second sliding pin mechanism. A portion of a sliding pin mechanism; (e) a first pivot and a second pivot extending through and connecting the omega clamp and the support member; the first pivot and the second pivot each having a hinge point in the support member and a pivot axis along the length of the support member between opposite ends of the support member; and wherein, when the first sliding pin mechanism and the second sliding pin mechanism slide to the release position, the omega clamp, together with the first pivot and the second pivot, pivots freely along the pivot axis away from the state covering the support member.

[0016] In another aspect, a filter system is provided, comprising: (a) a support grid having a frame and having opposing first and second sides; (b) a first filter element oriented along the first side of the support grid; (c) a second filter directly opposite the first filter and oriented opposite to the first filter on the support grid; and (d) a single clamping system that releasably secures both the first filter element and the second filter element to the frame.

[0017] The clamping system includes: (a) a support member; (b) a first clamp and a second clamp slidably mounted at opposite ends of the support member; (c) a first sliding pin mechanism and a second sliding pin mechanism slidably mounted on a portion of the support member; (d) an omega-shaped clamp removably mounted to cover the support member and slidably accommodate a portion of the first and second sliding pin mechanisms; and (e) a first pivot. A first pivot and a second pivot extend through and connect the omega clamp and the support member; each of the first and second pivots has a hinge point in the support member and a pivot axis along the length of the support member between opposite ends of the support member; and wherein, when the first and second sliding pin mechanisms slide to the release position, the omega clamp, together with the first and second pivots, pivots freely along the pivot axis away from the state of covering the support member.

[0018] The clamping system includes: (a) an elongated support member having: an open first end and an opposite open second end; a first sliding channel adjacent to the first end; and a second sliding channel adjacent to the second end; (b) a first clamp slidably mounted in the open first end; (c) a second clamp slidably mounted in the open second end; (d) a first sliding pin mechanism slidably mounted in the first sliding channel between a locked position and a released position; (e) a second sliding pin mechanism slidably mounted in the second sliding channel between a locked position and a released position; and (f) an elongated omega-shaped clamp removably mounted to cover the support member; the omega-shaped clamp... The omega-shaped clamp has a first through slot and a second through slot separated from each other; (i) the first through slot slidably accommodates a portion of the first sliding pin mechanism; (ii) the second through slot slidably accommodates a portion of the second sliding pin mechanism; (g) a first pivot and a second pivot extending through and connecting the omega-shaped clamp and the support member; the first pivot and the second pivot each having a hinge point in the support member and a pivot axis along the length of the support member between the open first end and the open second end of the support member; wherein, when the first sliding pin mechanism and the second sliding pin mechanism slide to the release position, the omega-shaped clamp, together with the first pivot and the second pivot, pivots freely along the pivot axis away from the state of covering the support member.

[0019] The filter system may include: (a) a first filter including a peripheral frame having a gasket on the peripheral frame; (b) a second filter including a peripheral frame having a gasket on the peripheral frame of the second filter; and (c) forming a seal, wherein the peripheral gasket of the first filter is located between the first clamp and the second clamp and the peripheral frame of the second filter and abuts against the first clamp and the second clamp and the peripheral frame of the second filter.

[0020] A seal is formed, wherein the peripheral gasket of the second filter is located between the omega-shaped clamp and the frame of the support grid and abuts against the omega-shaped clamp and the frame of the support grid.

[0021] In one example, the first filter includes a bag filter; and the second filter includes a bag filter.

[0022] In another aspect, a method is provided for servicing a filter mechanism in an air inlet system of a gas turbine; the system having a support grille having a frame and having opposing first and second sides; a first filter element releasably sealed to the first side of the support grille; and a second filter releasably sealed to the first side of the support grille, directly opposite and opposite to the first filter; the method comprising: (a) releasing a single clamp that holds both the first filter element and the second filter element in place and sealingly engages them to the support grille; (b) removing the first filter element while the second filter element remains sealed to the support grille; and (c) providing a replacement first filter element and engaging the single clamp to seal the replacement first filter element to the support grille.

[0023] The method may further include: (a) releasing another portion of the single clamp to remove the second filter element prior to the step of providing the replacement first filter element; and (b) providing the replacement second filter element and engaging the single clamp to seal the replacement second filter element to the support grid.

[0024] The method may further include using a single fixture with the different features described above.

[0025] On the other hand, a clamping system is provided for releasably attaching a filter assembly to a support grid. The clamping system includes: a plurality of clamping rods; an elongated first support member having openings, each opening sized to fit one of the clamping rods; a first sliding plate slidably mounted in the first support member; the first sliding plate having an opening capable of aligning with an opening in the first support member; the first sliding plate having an end handle; an elongated second support member having openings, each opening sized to fit one of the clamping rods; and a plurality of grips, each grip configured and arranged to engage one of the clamping rods and apply an axial force to the second support member.

[0026] The clamping system may further include a second sliding plate slidably mounted in the second support member; the second sliding plate having an opening that can be aligned with an opening in the second support member; and the second sliding plate having an end handle.

[0027] In many examples, each of these grips includes: a head defining a recess and a cam surface, the recess being sized to engage one of the clamping rods, the cam surface being located on a portion of the head opposite the recess; and a gripping handle extending from the head.

[0028] The first support member may have a rectangular cross-section wall with opposite open ends, and an opening in the first support member extends through the opposite side of the wall; and the second support member may have a rectangular cross-section wall with opposite open ends, and an opening in the second support member extends through the opposite side of the wall of the second support member.

[0029] In one or more examples, the opening of the first sliding plate has a narrowing region and a wider region.

[0030] In the example embodiment, the opening of the second sliding plate has a narrowing region and a wider region.

[0031] There can be two clamping rods and two grips.

[0032] In another aspect, a filter system is provided, comprising: a support grid having a frame and having opposite upstream and downstream sides; a first filter element oriented along the upstream side of the support grid; a second filter element directly opposite the first filter element and oriented opposite to the first filter element on the support grid and on the downstream side; and a single clamping system that releasably secures both the first filter element and the second filter element to the frame.

[0033] The second filter element may have a second element gasket pressed against the upstream side of the support grid; and the first filter element may have a first element gasket pressed against the clamping system.

[0034] In an example embodiment, the clamping system includes: one or more clamping rods extending from the support grid; an elongated first support member holding a first sliding plate and positioned on the clamping rods; the first support member being positioned against the second element washer; an elongated second support member positioned on the clamping rods and against the first element washer, such that the first element washer is positioned between and against the first and second support members; and one or more handles removably attached to the clamping rods and applying an axial force to the second support member.

[0035] Many embodiments further include a second sliding plate held by the second support member and positioned on the clamping rods.

[0036] In the example, there are multiple first filter elements on the upstream side of the support grid; and these first filter elements include bag filter elements or V-shaped elements.

[0037] In the example, there are multiple second filter elements on the downstream side of the support grid; and these second filter elements include V-shaped filter elements.

[0038] In another aspect, a method is provided for servicing a filter mechanism in an air inlet system of a gas turbine; the system having a support grille having a frame and having opposite upstream and downstream sides; a first filter element releasably sealed to the upstream side of the support grille; and a second filter element releasably sealed to the upstream side of the support grille, directly opposite and opposite to the first filter element; the method comprising: releasing a single clamping assembly that holds both the first and second filter elements in place and seals them onto the support grille; removing the first filter element while the second filter element remains sealed onto the support grille; and providing a replacement first filter element and engaging the single clamping assembly to seal the replacement first filter element onto the support grille.

[0039] The method may further include: releasing another portion of the single clamping assembly to remove the second filter element prior to the step of providing the replacement first filter element; and providing the replacement second filter element and engaging the single clamping assembly to seal the replacement second filter element to the support grid.

[0040] In one or more example methods, the step of engaging the single clamp assembly to seal the replacement first filter element to the support grid includes: gripping the handle and rotating the handle from an open position to a closed position to apply an axial force to the clamp assembly.

[0041] The step of engaging the single clamp assembly may include: after rotating the handle to apply an axial force to the clamp assembly, moving the first sliding plate to lock the second filter element against the support grid into a sealed position.

[0042] The method may further include: after moving the first sliding plate to lock the second filter element against the support grid into a sealed position, moving the second sliding plate to lock the first filter element into a sealed position; and rotating the handle back to the open position and removing the handle.

[0043] The method may include a single clamping assembly having the different features described above.

[0044] The following description illustrates several examples of the desired features or methods. Attached Figure Description

[0045] Figure 1 This is an exploded perspective view of a filter system for use with a gas turbine air system, depicting a first filter element, a second filter element, a portion of the gas turbine support grille, and a clamping system.

[0046] Figure 2 yes Figure 1 A three-dimensional view of the system, wherein the second filter element is fixed in place and the first filter element is removed from the support grid;

[0047] Figure 3 yes Figure 1 A perspective view of a part of the system, wherein a first filter element and a second element are positioned against a support grid, and a clamping system is engaged to secure both the first filter element and the second filter element.

[0048] Figure 4 yes Figures 1 to 3 Exploded perspective view of the fixture system used;

[0049] Figure 5 This is an enlarged front view of a part of the clamping system during a step of servicing the second filter element;

[0050] Figure 6 This is a perspective view showing one step in repairing the second filter element;

[0051] Figure 7 This is an enlarged view showing the cross-sections of both a first filter element and a second filter element that are sealed and joined to the support grille of the gas turbine air inlet system; and

[0052] Figure 8 This is a schematic perspective view showing the gasket of the first filter element, with the remainder of the first filter element hidden to improve clarity, and how the first filter element is held in place by the clamping system.

[0053] Figure 9 This is a perspective view of another embodiment of a gas turbine air inlet system constructed based on the principles of this disclosure;

[0054] Figure 10 yes Figure 9The system is smaller, but to show reference to the accompanying drawings;

[0055] Figure 11 yes Figure 10 An enlarged view of the portion shown at point A;

[0056] Figure 12 yes Figure 10 An enlarged view of the portion shown at point B;

[0057] Figure 13 yes Figure 9 A top-down plan view of the system;

[0058] Figure 14 yes Figure 13 A cross-sectional view of the portion shown at section CC;

[0059] Figure 15 It is shown in Figure 9 A three-dimensional view of the clamping system used in the air inlet system;

[0060] Figure 16 yes Figure 15 Another perspective view of the clamping system;

[0061] Figure 17 yes Figure 15 A top plan view of the clamping system;

[0062] Figure 18 yes Figure 15 An exploded perspective view of the fixture system;

[0063] Figure 19 yes Figure 15 Another exploded stereoscopic view of the clamping system;

[0064] Figure 20 Is Figures 24 to 39 A perspective view of the clamping rod used in another embodiment of the clamping system shown;

[0065] Figure 21 Is Figures 24 to 39 A perspective view of another clamping rod used in the clamping system;

[0066] Figure 22 Is using Figures 24 to 39 A three-dimensional view of a portion of the air inlet system of the clamping system;

[0067] Figure 23 It is similar to Figure 22 However, it was shown Figures 24 to 39 A view of another part of the clamping system;

[0068] Figure 24 It is used for Figure 22 and Figure 23 A perspective view of the clamping components of the air inlet system;

[0069] Figure 25 yes Figure 24 An enlarged view of section A;

[0070] Figure 26 yes Figure 24 Front view of the clamping system;

[0071] Figure 27 yes Figure 26 Section view of section 27-27;

[0072] Figure 28 In application Figures 24 to 27 A three-dimensional view of the air inlet system during one step of the clamping system;

[0073] Figure 29 This shows the application. Figures 24 to 27 A perspective view of another step in the clamping system;

[0074] Figure 30 yes Figure 29 A cross-sectional view of a portion of the fixture system shown;

[0075] Figure 31 This shows the application. Figures 24 to 27 A perspective view of another step in the clamping system;

[0076] Figure 32 It has Figures 24 to 27 A three-dimensional view of a portion of the air inlet system of the clamping system;

[0077] Figure 33 yes Figure 32 An enlarged stereoscopic view of the portion shown at point Y;

[0078] Figure 34 yes Figure 32 An enlarged stereoscopic view of the portion shown at point Z;

[0079] Figure 35 It is shown Figures 24 to 27 A three-dimensional view of the clamping system;

[0080] Figure 36 yes Figure 35 Another perspective view of the clamping system;

[0081] Figure 37 yes Figure 35 A top plan view of the clamping system;

[0082] Figure 38 yes Figure 35An exploded perspective view of the fixture system;

[0083] Figure 39 yes Figure 35 Another exploded stereoscopic view of the clamping system;

[0084] Figure 40 yes Figures 9 to 19 Decomposed stereoscopic view of a variant of the system;

[0085] Figure 41 yes Figure 40 A three-dimensional view of a part of the system;

[0086] Figure 42 yes Figure 41 An enlarged cross-sectional view of a portion;

[0087] Figure 43 yes Figure 40 A top-down plan view of the system;

[0088] Figure 44 yes Figure 43 A magnified view of a portion;

[0089] Figure 45 yes Figures 9 to 19 Decomposed stereoscopic view of a variant of the system;

[0090] Figure 46 yes Figure 45 A three-dimensional view of a part of the system;

[0091] Figure 47 yes Figure 46 An enlarged cross-sectional view of a portion;

[0092] Figure 48 yes Figure 45 A top-down plan view of the system;

[0093] Figure 49 yes Figure 48 A magnified view of a portion;

[0094] Figure 50 yes Figures 9 to 19 Decomposed stereoscopic view of a variant of the system;

[0095] Figure 51 yes Figure 50 A three-dimensional view of a part of the system;

[0096] Figure 52 yes Figure 51 An enlarged cross-sectional view of a portion;

[0097] Figure 53 yes Figure 51 An enlarged cross-sectional view of a portion;

[0098] Figure 54 yes Figure 51 An enlarged cross-sectional view of a portion;

[0099] Figure 55 yes Figure 51 A three-dimensional view of the system;

[0100] Figure 56 yes Figure 55 A top-down plan view of the system;

[0101] Figure 57 yes Figure 56 A magnified view of a portion; and

[0102] Figure 58 It is to utilize Figures 1 to 57 A schematic view of one or more example systems and components of a filtration system and components. Detailed Implementation

[0103] Figure 1 A portion of a gas turbine air inlet system with a first filter element 20 and a second filter element 22 is shown. Figure 1 A portion of the first filter element 20 is also shown vertically above and below the first element 20, which is shown in its entirety. Similarly, a portion of the second filter element 22 is also shown vertically above and below the other second element 22.

[0104] Many different types of filter elements can be used. In this particular example, the first filter element 20 is, for example, a bag filter element shown and described by reference to US7,931,723, which is incorporated herein by reference. The second filter element 22 can also be a bag filter, although many different variations are possible. Each of the elements 20 and 22 has filter media 21 and 23, respectively. The first filter element 20 can also be a V-bank filter.

[0105] exist Figure 1 The image shows a portion of a support grid 24 with a frame 26. The support grid 24 will comprise a matrix of several (e.g., hundreds) rectangular grids with openings 28. Each opening 28 accommodates one of the second filters 22 and one of the first filters 20. In this example, the support grid 26 has opposing first sides 29 and second sides 30. The first side 29 is typically the upstream side, while side 30 is the downstream side. During installation, the first filter element 20 and the second filter element 22 will be oriented opposite to each other on the support grid 24, such that the first filter element 20 is on the upstream side 24 and the second filter element 22 is on the downstream side 30.

[0106] Figures 1 to 8 Example embodiments of clamping systems

[0107] exist Figure 1 Also visible is the fixture system 32. The fixture system 32 is... Figure 1 The upper portion is shown as separated from the support grid 24, while the lower portion of the figure is shown as being fixed to the support grid 24. The clamping system 32 is a single clamping system that releasably fixes both the first filter element 20 and the second filter element 22 to the frame 26 of the support grid 24.

[0108] The first filter element 20 includes a peripheral frame 34 extending completely along each side of the first element 20. The peripheral frame includes a first side 34a facing away from the filter medium 21. Figure 7 The first side 34a faces the opposite second side 34b, which faces the filter media 21. A gasket 36 is fixed to the peripheral frame 34 on the first side 34a. Figure 7 and Figure 8 Gasket 36 is secured to frame 34 on the first side 34a facing away from filter medium 21 and along the entire periphery of first element 20. Gasket 36 can be made of a variety of materials, including soft foam.

[0109] The second element 22 includes a peripheral frame 38, such as... Figure 1 As seen in the image, the peripheral frame 38 extends along the entire periphery of the second element 22. The peripheral frame 38 includes a first side 38a facing away from the filter medium 23 and an opposite second side 38b facing the filter medium 23. Figure 7 The washer 40 is fixed to the peripheral frame 38 of the second component 22. Washer 40 is not present. Figure 1 On the visible side 38a, but can be seen Figure 7 The section shown is at 38b. Washer 40 is on the remaining portion of frame 38 facing the second element 22. (From a review...) Figure 1 and Figure 7 It is understood that the gasket 40 for the second filter element 22 is pressed against the first side or upstream side 29 of the frame 26 of the support grid 24. Then the gasket 36 of the first filter element 20 is pressed against the frame 38 (first side 38a of the frame 38) of the second element 22. The clamp 32 holds the first filter element 20 and the second filter element 22 in place and seals them onto the support grid 24.

[0110] Typically, in the operation of a gas turbine air inlet system, the air to be filtered enters a first filter element 20, where particles and debris are removed by passing through a filter medium 21. The filtered air then flows through a second element 22 via a flow medium 23 from its interior to its downstream exterior, and then continues to the gas turbine. In this configuration, the first filter element 20 is typically located on the upstream side of a support grille 24, while the second element 22 is primarily located on the downstream side of the support grille 24; however, the seal formed by the gasket 40 of the second element 22 is along the first or upstream side 29 of the support grille 24.

[0111] Now refer to Figure 4 The example fixture system 32 is shown in an exploded view.

[0112] A clamping system 32 is used to releasably attach a filter assembly, including a first element 20 and a second element 22, to a support grid 24. The clamping system 32 allows both the first filter element 20 and the second filter element 22 to be held in place and sealed to the support grid 24 using a single system 32. While the second filter element 22 remains sealed to the support grid 24, the clamping system 32 can be released to allow removal and replacement of the first filter element 20. The clamping system 32 also allows for periodic removal and replacement of the second element 22. Typically, the first filter element 20 requires removal and replacement at more frequent intervals than the second element 22.

[0113] The clamping system 32 includes an elongated support member or tube 45. The support tube 45 has an open first end 46 and an oppositely open second end 47. The support tube 45 also includes a first sliding channel 48 adjacent to the first end 46 and a second sliding channel 49 adjacent to the second end 47. The first sliding channel 48 and the second sliding channel 49 are formed by openings in the tube 45 spaced apart from the ends 46 and 47. As can be seen, a first housing 50 and a second housing 51 exist such that the area between the ends of the housings 50 and 51 and the open ends 46 and 47 is a closed straight-through channel.

[0114] The tube 45 further includes a through-hole 52 passing through the housing 50 and the remainder of the tube 45, and a through-hole 53 passing through the housing 51 and the remainder of the tube 45. The through-holes 52 and 53 receive protrusions or nails 55 and 56 extending from the frame 26 supporting the grille 24. Figure 1 This allows the pipe 45 to be mounted on and abut against the frame 26 of the grille 24.

[0115] The clamping system 32 further includes a first pivot 58 and a second pivot 59. Each of the first pivot 58 and the second pivot 59 has a rotatable hinge point 60, 61 held within a corresponding housing within a support tube 45 in the housings 50, 51. The first pivot 58 and the second pivot 59 pivot along a pivot axis 62, which runs along the length of the support tube 45 between the open first end 46 and the open second end 47. Arrows 63, 64 generally indicate the direction of pivoting of the rods 58, 59 about their hinge points 60, 61. The purpose of this pivoting is described further below.

[0116] In addition, Figure 4 In this configuration, each of the first pivot 58 and the second pivot 59 includes a cylindrical nut 66, 67 located on a portion of the pivot 58, 59 away from or opposite to the hinge point 60, 61. The cylindrical nuts 66, 67 allow engagement with the maintenance tool 70, which is further described below.

[0117] The clamping system 32 further includes a first clamp 74 slidably mounted in an open first end 46 and a second clamp 75 slidably mounted in an open second end 47. Each of the first clamp 74 and the second clamp 75 includes a sliding rod 76, 77, sized such that it slides within one of the open first end 46 and the open second end 47 of the support tube 45. Extensions or posts 78, 79 are fixed to and perpendicular to the respective sliding rods 76, 77. Flanges 80, 81 are fixed to the distal portions of the respective posts 78, 79 and are parallel to and face the sliding rods 76, 77 to form washer-holding recesses 82, 83 between the flanges and the sliding rods. The first clamp 74 and the second clamp 75 releasably hold the first filter element 20 in place and in a sealed engagement.

[0118] The clamping system 32 further includes a first sliding pin mechanism 86 and a second sliding pin mechanism 87. The first sliding pin mechanism 86 is slidably mounted in a first sliding channel 48 between a locked position and a released position. The second sliding pin mechanism 87 is slidably mounted in a second sliding channel 49 between a locked position and a released position. In the locked position, the second filter element 22 is secured in place against the grille 24. In the unlocked position, the second filter element 22 can be removed from the grille 24 for maintenance (replacement). This is further described below.

[0119] Each of the first sliding pin mechanism 86 and the second sliding pin mechanism 87 includes a pin sliding rod 89, 90, the pin sliding rod being sized such that it slides within a corresponding sliding channel in the first sliding channel 48 and the second sliding channel 49. The sliding channels 48, 49 are located within housings 50, 51. Each of the first sliding pin mechanism 86 and the second sliding pin mechanism 87 further includes corresponding supports 91, 92 fixed to and perpendicular to the pin sliding rod 89, 90.

[0120] Pin flanges 93 and 94 are secured to the distal portions of the respective supports 91 and 92 and parallel to the pin slide bars 89 and 90, with the inner surfaces of pin flanges 93 and 94 facing the respective pin slide bars 89 and 90. Pin flanges 93 and 94 also have opposite outer surfaces. Each of the first sliding pin mechanism 86 and the second sliding pin mechanism 87 further includes pins 95 and 96. Pins 95 and 96 protrude from the outer surfaces of pin flanges 93 and 94, and these pins are sized such that they slide within the first groove 98 and the second groove 99 of the omega clamp 100.

[0121] The clamping system 32 includes an elongated omega-shaped clamp 100. The omega-shaped clamp 100 is removably mounted to cover the support tube 45. The omega-shaped clamp 100 includes a base 102, wherein a pair of legs 103, 104 extend perpendicularly to the base 102. The base 102 defines a first through-slot 98 and a second through-slot 99 for receiving pins 95, 96. (As can be seen in...) Figure 4 As seen in the image, slots 98 and 99 are separated from the opposite ends of the omega-shaped clamp 100 and are also separated from each other.

[0122] The base 102 has an outer side 106 ( Figure 7 ) and the opposite inner 107 ( Figure 7 Each of the legs 103, 104 is bent away from the base 102 at a non-zero angle and opposite to each other to form pressing flanges 108, 109. The non-zero angle may include a range of 30-90° between the pressing flanges 108, 108 and portions of the legs 103, 104 perpendicular to the base 102, but many embodiments are possible. The inner side 107 of the legs 103, 104 and the base 102 defines an open channel 110.

[0123] The omega-shaped clamp 100 further includes a first pin-slider retainer 112 and a second pin-slider retainer 113. Figure 4 In the diagram, the pin-slider retainers 112 and 113 are shown in dashed lines because they are located on the inner side 107 of the base 102. The slider retainers 112 and 113 overlap with a portion of the first through slot 98 and the second through slot 99.

[0124] The dimensions of the first pin-slider retainer 112 and the second pin-slider retainer 113 are determined such that they slidably receive a corresponding pin flange of pin flanges 93, 94 to place the first sliding pin mechanism 86 and the second sliding pin mechanism 87 in a locked position. When the first sliding pin mechanism 86 and the second sliding pin mechanism 87 slide to the release position, the omega-shaped clamp 100, together with the first pivot 58 and the second pivot 59, pivots freely along the pivot axis 62 and away from the state of the cover support tube 45. That is, when the first pin sliding mechanism 86 and the second pin sliding mechanism 87 slide to the release position, each pin flange of pin flanges 93, 94 slides away from the first pin-slider retainer 112 and the second pin-slider retainer 113, and the omega-shaped clamp 100 pivots freely along the pivot axis 62 in the directions of arrows 63, 64.

[0125] During assembly, the first pivot 58 and the second pivot 59 extend through and connect the omega clamp 100 and the support tube 45. The base 102 of the omega clamp 100 includes through holes 114 and 115 for receiving the pivots 58 and 59.

[0126] Still refer to Figure 4 The clamping system 32 includes a separate maintenance tool 70. The maintenance tool 70 is configured and arranged to engage each of the first pivot 58 and the second pivot 59 and to apply an axial force to the omega clamp 100 during maintenance of the second filter element 22.

[0127] The maintenance tool 70 includes a head 118 defining a recess 119 sized to engage a first pivot 58 and a second pivot 59. The head 118 includes a cam surface 120 located on a portion of the head 118 opposite the recess 119. The maintenance tool 70 also includes a gripping handle 121 sized to be held by a human hand. The gripping handle 121 extends from the head 118.

[0128] If it is possible Figure 5 As seen in the diagram, maintenance tool 70 can be used to place the recess 119 onto the cylindrical nuts 66, 67 of the respective pivots 58, 59. Maintenance tool 70 is then rotated or pivoted about the cylindrical nuts 66, 67, which moves the cam surface 120 against the omega clamp 100. Specifically, the cam surface 120 can be moved to provide a force against the base 102 of the omega clamp 100. This then applies pressure to the frame 38 of the second element 22 to press against the washer 40 of the second element 22.

[0129] Figure 3This diagram shows a portion of the system when the first element 20 and the second element 22 are in place and the clamping system 32 is engaged to secure the two elements 20, 22 in place. The pin 95 of the first sliding pin mechanism 86 can be seen in the locked position, where the pin is located at the outermost portion of the first slider 98. The pin is held by the first slider retainer 112. The first pivot 58 can be seen extending through the hole 114 in the omega-shaped clamp 100. The flange 80 of the first clamp 74 can be seen pressing against the frame 34 of the first filter element 20.

[0130] Now, an example method for repairing the filter mechanism will be explained. (Refer to...) Figure 2 The first step is to slide the first clamp 74 and the second clamp 75 outward from the rest of the assembly, such that the first clamp and the second clamp slide away from each other and outward. This can be achieved by... Figure 2 As can be seen, clamps 74 and 75 have slid open, causing flanges 80 and 81 to move away from the frame 34 of the first filter element 20. This step allows the second filter element 22 to remain in a sealed engagement with the support grid 24, but releases the first element 20 so that it can be removed. A new replacement first element 20 can be provided. The new first element 20 is placed such that the peripheral frame 34 of the retaining washer 36 of the first element 20 can be positioned against the first side of the peripheral frame 38a. The replacement filter element 20 can be axially pressed against the frame 38a of the second element 22, and then the first clamp 74 and the second clamp 75 can be slid inward toward each other again, so that flanges 80 and 81 rest on the peripheral frame 34 on the second side 34b opposite to the first side 34a where the washer 36 is located. Flanges 80 and 81 help to hold the first element 20 in place, where a seal is formed against the frame 38 (second side 38b) of the second element 22. See Figure 7 .

[0131] Sometimes, it may also be necessary to repair and replace the second element 22. During this maintenance step, the gas turbine inlet system is closed. First, the first filter element 20 is removed by the steps described above. That is, the first clamp 74 and the second clamp 75 are moved outwards away from each other, which allows the first element 20 to be released and removed. Next, the maintenance tool 70 is used to press the omega clamp 100 against the peripheral frame 38 of the second element 22 and compress the washer 40 of the second element 22 to its maximum displacement. The maintenance tool 70 is used by placing the recess 119 against the cylindrical nuts 66, 67 and pivoting the maintenance tool 70 so that the cam surface 120 presses against the base 102 of the omega clamp 100.

[0132] Next, pins 95 and 96 are moved or slid inward toward each other within their respective slots 98 and 99. This releases pin flanges 93 and 94 from pin slider holders 112 and 113. This also releases omega-shaped clamps 100 from support tube 45.

[0133] Now refer to Figure 6 Then the omega-shaped clamp 100 can be pulled and lifted away from the second filter element 22. Specifically, the clamp can be positioned at arrows 63 and 64 (…). Figure 4 In the direction of and along the pivot axis 62, or as Figure 6 The pivot point is shown to pivot upwards or downwards along with pivots 58 and 59. This allows access to the second element 22, enabling its removal from the support grid 24.

[0134] A new second element 22 is provided and placed in the opening 28. A washer 40 is pressed against the first side 29 of the support grid 24. The omega clamp 100 is then pivoted on the peripheral frame 38 of the second element 22, such that the washer 40 of the second element 22 is pressed between the peripheral frame 38 (i.e., the second side 38b) of the second element 22 and against the support grid 24. The first element 20 is then placed directly opposite the second element 22, and in the opposite direction, such that the washer 36 of the first element 20 is pressed against the frame 38 (i.e., the first side 38a) of the second element 22. The first clamp 74 and the second clamp 75 are then moved inward, such that flanges 80, 81 press against the second side 34b and hold the peripheral frame 34 of the first element 20.

[0135] Figures 9 to 19 Example Implementation

[0136] exist Figure 9 In the diagram, a gas turbine air inlet system 200 is shown. The gas turbine air inlet system 200 is similar to the gas turbine air inlet system described by reference to US 8,673,040, which is incorporated herein by reference. Multiple rows and columns of filter elements are arranged on a tube sheet or support grille (as previously described with respect to support grille 24). Support grille 24 includes a frame 26 having an upstream side 29 and an opposite downstream side 30. Each opening in support grille 24 accommodates at least one first filter element 202 on the upstream side 29 and one second filter element 204 on the downstream side 30. Figure 9 As seen in the image, the support grid 24 comprises a matrix of several (e.g., hundreds) first filter elements 202 on the upstream side 29 and second filter elements 204 on the downstream side 30.

[0137] As depicted, the first filter element 202 and the second filter element 204 are typically oriented directly facing each other on the support grid 24 and cover one of the openings 28 in the support grid 24.

[0138] Many different types of filter elements can be used. In the illustrated example, the first filter element 202 includes a bag filter element 205, while the second filter element 204 includes a V-type filter element 206. Example bag filter elements are described in US 7,931,723, which is incorporated herein by reference. Example V-type filter elements are each described in US 8425644, US 10486094, US 7334490, US 9623356, and US 8951321, which are incorporated herein by reference. In other embodiments, the first filter element 202 may also be a V-type filter element.

[0139] The first filter element 202 and the second filter element 204 each have peripheral gaskets 201 and 203, which are constructed and arranged to be axially compressed to form a seal.

[0140] and Figures 1 to 8 As in the previous embodiment, a single clamping system 210 is used to releasably secure both the first filter element 202 and the second filter element 204 to the frame 26 supporting the grid 24.

[0141] Now refer to Figures 16 to 19 The image depicts a clamping system 210. The clamping system 210 releasably attaches a filter assembly, including a first filter element 202 and a second filter element 204, to a support grid 24. The clamping system 210 includes a plurality of clamping rods 212, 214.

[0142] In the illustrated example, each clamping system 210 includes two clamping rods 212, 214. The clamping rods 212, 214 are typically non-removably secured to the frame 26 to protrude therefrom. Each of the rods 212, 214 has a cylindrical base 216 extending from the grid engagement portion to approximately half the length of the rod 212, 214. The other half of the rod 212, 214 extending to its free (end) end has a narrowing section 218, which is a grip engagement section 218 configured to receive one of the grips 220, 222. The narrowing section 218 includes protrusions 219 extending from its side or lateral portion.

[0143] The clamping system 210 further includes an elongated first support member or tube 224. The first support tube 224 can be many different shapes having various cross-sections. In the particular non-limiting example shown, the first support tube 224 includes a generally rectangular cross-section wall 226 having opposite open ends 227, 228. The wall 226 is positioned on a flange plate 230 that supports it along its length.

[0144] The support tube 224 may have a single opening ( Figures 45 to 49 (or multiple openings.) Figures 9 to 19 In the non-limiting example shown, there are two openings 232, 234. In this case, openings 232, 234 mate with and are axially aligned with clamping rods 212, 214. The dimensions of each opening 232, 234 are determined such that it receives one of the clamping rods 212, 214 or adapts to one of the clamping rods. Openings 232, 234 also extend through flange plate 230.

[0145] The clamping system 210 further includes a first sliding plate 236. The first sliding plate 236 is removably and slidably mounted in the first support tube 224. In the illustrated example, the first sliding plate 236 can be inserted through the open end 228 and is within the rectangular wall 226.

[0146] The first sliding plate 236 has openings shown as 238 and 240. Openings 238 and 240 can be aligned with openings 232 and 234 of the first support tube 224. Openings 238 and 240 can be configured to help lock the second filter element 204 into a sealing engagement with the grille 24, as further described below. In the illustrated example, openings 238 and 240 have a narrowing region 242 and a wider region 244.

[0147] The first sliding plate 236 further includes an end handle 246. When the first sliding plate 236 is positioned within the first support tube 224, the end handle 246 protrudes from the first support tube 224, extending from an open end 228. The end handle 246 can be used to move the sliding plate 236 between a locked position and an unlocked position. The end handle 246 is generally perpendicular to the remainder of the first sliding plate 236.

[0148] The clamping system 210 further includes an elongated second support profile, component, or tube 250. The second support tube 250 further includes a plurality of openings shown as openings 252 and 254. Each opening 252, 254 is arranged and sized such that it is adapted to fit one of the clamping rods 212, 214.

[0149] The second support tube 250 has a rectangular cross-section wall 256. The wall 256 has opposite open ends 257 and 258. Openings 252 and 254 extend through the opposite sides of the wall 256.

[0150] exist Figure 18 The image also shows a mounting plate 260 having posts 262, 264 projecting from it. Mounting bases 266, 268 receive posts 262, 264. Mounting bases 266, 268 are secured to rods 212, 214. The assembly including the plate 260 with posts 262, 264 and mounting bases 266, 268 is secured to or may be integral with the support grid 24. Many variations are possible.

[0151] The handles 220, 222 are similar to the maintenance tool 70 previously described. The handles 220, 222 are constructed and arranged to engage one of the clamping rods 212, 214 and apply an axial force to the support tube 250.

[0152] Each of the grips 220 and 222 includes a head 270. The head 270 defines a recess 272, the dimensions of which are determined such that it engages the gripping engagement portion or narrower portion 218 of the levers 212 and 214. Each head 270 further includes a cam surface 275 in the form of a flat area, and this cam surface is located on the portion of the head 270 opposite to the recess 272. A grip handle 276 is sized for comfortable human hand gripping and extends from the head 270.

[0153] exist Figure 19 As can be seen, each grip 220, 222 divides its head 270 into head parts 277, 278. Between the head parts 277, 278 is a receiving groove 280. The receiving groove 280 is sized such that it fits around the grip engagement section 218 of the rods 212, 214. Each head part 277, 278 includes a recess 272 that hooks onto a protrusion 219 of the rods 212, 214.

[0154] In use, the handles 220 and 222 can be fitted around the rods 212 and 214, such that the recess 272 in the head 270 engages with the protrusion 219, and the handle 220 can be used from... Figure 9 and Figure 17 The unlocking position shown in 282 pivots to also Figure 9 The lock 284 is shown in the diagram. The unlocked position includes the cam surface 272 disengaging from the second support tube 250 and the handle 276 extending away from the support grille 24. The locked position 284 includes the cam surface 274 abutting against the second support tube 250 and the handle 276 generally pointing towards each other and almost generally parallel to the support grille 24.

[0155] exist Figures 9 to 19In the system, the second filter element 204 is initially placed through one of the openings in the support grid 24, such that it is on the downstream side 30, with its washer 203 on the upstream side 29 and abutting against the frame 26. The first support tube 224, together with the first sliding plate 236, is then placed on the rods 212, 214, such that the flange plate 230 of the support tube 224 abuts against the manifold frame of the second filter element 204. The sliding plate 236 can then be moved or slid by pulling the end handle 246 in a direction laterally outward from the second filter element 204. The washer 203 is not yet compressed.

[0156] Next, the second support profile or tube 250 is placed on the rods 212, 214, and the handles 220, 222 are loosely fitted onto the clamping rods 212, 214. The first filter element 202 is then installed by placing the manifold frame of the first filter element 202 below the second support tube 250. The handles 220, 222 are then rotated from a position where the handle 276 is generally perpendicular to the frame 26 to a position where the handle 276 is generally parallel to the frame 26. This compresses both the washer 201 of the first filter element 202 and the washer 203 of the second filter element 204. Next, the sliding plate 236 is moved or slid by gripping the end handle 246 and moving it toward the elements 202, 204. This keeps the second filter element 204 clamped, with the washer 203 compressed, and allows for in-line replacement of the first filter element 202.

[0157] For repair Figures 9 to 19 The filter mechanism is processed in reverse by releasing the clamping system 210 that holds both the first filter element 202 and the second filter element 204 in place and seals them to the support grid 24. While the second filter element 204 remains in a sealed engagement, the first filter element 202 is removed. A replacement first filter element 202 is provided, and the single clamping system 210 is engaged to seal the replacement first filter element 202 to the support grid 24.

[0158] Engaging the individual clamping system 210 may include gripping the handles 220, 222 and rotating the handles 220, 222 from the open position to the closed position to apply an axial force to the clamping system 210. After rotating the handles 220, 222, the first sliding plate 236 may be moved to lock the second filter element 204 against the support grid 24 into a sealed position.

[0159] The second filter element 204 can also be replaced periodically. This is done by sliding the sliding plate 236 to an unlocked or released position after the first filter element 202 has been removed, by moving the sliding plate 236 laterally (obliquely to one side) away from the elements 202, 204. This releases the seal of the gasket 203 on the second element 204. The first support tube 224 can then be removed, which allows the second filter element 204 to be removed from the frame 26. The replacement second element 204 is then provided and inserted into the opening in the frame 26, with the gasket 203 abutting against the upstream side 29 of the frame 26. The first support tube 224 is then reattached to the rods 212, 214. The second support tube 250 is then attached to the rods 212, 214, and the first filter element 202 is oriented such that the gasket 201 is positioned between the first support tube 224 and the second support tube 250. Rotating the handles 220 and 222 causes the moving cam surface 274 to abut against the second support tube 250, applying an axial force to the first support tube 224 and the second support tube 250, thereby compressing the washers 201 and 203. Then the first sliding plate 236 moves to the locked position and slides toward the elements 202 and 204.

[0160] Figures 20 to 39 Example Implementation

[0161] Now refer to Figures 20 to 39 An alternative embodiment of the clamping system 210 is provided, generally depicted as 201'. The difference between clamping system 210 and clamping system 210' is the presence of a second sliding plate 300. Figure 38The second sliding plate 300 is held by the second support tube 250 and positioned on the clamping rods 212, 214. The second sliding plate 300 includes an end handle 302 that projects generally perpendicular to its remainder. In this system, after the handles 220, 222 are rotated to the locked position, both the first sliding plate 236 and the second sliding plate 300 move or slide to the locked position, in which the first sliding plate 236 secures the washer 203 of the second filter element 204 to the sealing position, and the second sliding plate 300 secures the washer 201 of the first filter element 202 to the sealing position. Afterward, the handles 220, 222 can be removed from the system, and both the first filter element 202 and the second filter element 204 are secured in place. The movement of moving the first sliding plate 236 and the second sliding plate 300 to the locked position includes laterally outward movement of the sliding plates 236, 300 in a direction away from the filter elements 202, 204. In the illustrated example, end handles 246 and 302 are on opposite sides of elements 202 and 204 and are moved away from each other when moved to the locked position. In other embodiments, the movement can be reversed—that is, instead of moving the slides 236 and 300 laterally away from each other to the locked position, they can be designed in reverse such that moving the slides 236 and 300 laterally toward each other results in the locked position.

[0162] When repair Figures 20 to 39 When the system is in operation, the second sliding plate 300 is slid by moving the second sliding plate 300 inward toward the first filter element 202 and the second filter element 204. This allows the second support tube 250 to be lifted or pivoted and the first filter element 202 to be removed. The first filter element 202 can then be provided and oriented for replacement, with the gasket 201 between the first support tube 224 and the second support tube 250. The handles 220, 222 can then re-engage with the rods 212, 214 and be rotated to compress the second support tube 250 against the gasket 201 of the first filter element 202. The second sliding plate 300 can then be moved to lock the first filter element 202 into a sealed position.

[0163] Sometimes, the second filter element 204 will also be replaced, and the second filter element 204 can be removed and replaced after the first filter element 202 has been removed as described above, as per [reference to...]. Figures 9 to 19 The embodiments are described in detail below.

[0164] Figures 40 to 44 Example Implementation

[0165] Figures 40 to 44 It shows Figures 9 to 19Variations of the embodiments, wherein the same reference numerals are used to indicate similar parts. In this embodiment, instead of having a second support member 250, there is a second support member 250' having the same profile shape as the elongated first support member 224.

[0166] Figures 45 to 49 Example Implementation

[0167] Figures 45 to 49 It shows Figures 9 to 19 A variation of the embodiment is provided, wherein the same reference numerals are used to indicate similar parts. In this embodiment, instead of having a pair of handles 220, 222, there is a single handle 220' centered on the support members 224, 250. There is also only a single clamping rod 212', which is fixed to the grille 26 and horizontally centered for each filter 204, 205.

[0168] Figures 50 to 57 Example Implementation

[0169] Figures 50 to 57 It shows Figures 9 to 19 Variations of the embodiments, wherein the same reference numerals are used to indicate similar parts.

[0170] In this embodiment, both the first filter element 202 and the second filter element 204 are V-shaped filter elements 206. Figures 9 to 19 Compared to the previous embodiment, the horizontal and vertical spacing between each element 206 is larger, one purpose of which is to accommodate additional grips, as explained below.

[0171] System 200 includes a handle 223 along the lateral side of each element 206 to facilitate holding the element 206 in place on the frame 26. Extending from the vertical member of the frame 26 is a connector rod 213 that engages with the handle 223. Clamping members 285, 286 are also present to facilitate clamping the element 206 against the element frame manifolds 287, 288 in place.

[0172] Figure 58 Example Implementation

[0173] The air filtration system described above can be used in a variety of environments and systems. For example, the air filtration system described above can be used to filter incoming air to prevent airborne viruses. Such applications can include livestock environments, such as pig farms, poultry farms, and other livestock where airborne viruses can infect them.

[0174] A static positive pressure air filtration system using small turbine units can be used. Filter elements with filtration grades from MERV 14 to HEPA can be applied to capture relevant airborne viruses. A single unit can provide 250,000 CFM using 90 filter elements, and multiple units can be configured based on the number of livestock to be accommodated to meet overall airflow requirements.

[0175] In the prior art, negative pressure air filtration with a pressure differential of less than 0.2 inches of water is used to determine the size of the system. These prior art systems require significantly large systems to provide efficient filtration and the required flow rates. The system described in this disclosure is approximately one-third the size of prior art solutions, with significantly reduced maintenance and operating resources.

[0176] use Figures 1 to 57 The air filtration system uses a positive pressure filtration system, which results in a smaller system and offers advantages such as easier maintenance and better safety during conversion. It will have a positive pressure differential of up to 1.0 inch of water and fewer than 300 filter units.

[0177] Now refer to Figure 58 The diagram shows a system with a livestock pen 302. The pen 302 can be used for various livestock (e.g., pigs 304), or for poultry (e.g., chickens, turkeys), sheep, goats, cattle / cattle, horses, etc.

[0178] System 300 includes a filtration system 306, which may include the components described above. Figures 1 to 57 Any system described in the system. Filtration system 306 draws in air from the outside atmosphere at inlet area 308. This air is filtered to remove contaminants, including viruses, and the filtered air is discharged through outlet area 310 in the interior 312 of shed 302. As shown here, outlet area 310 is adjacent to the ceiling 314 of the livestock area in the interior 312 of shed 302. Interior air from the interior 312 of shed 302 is discharged from shed 302 to the outside atmosphere through exhaust louvers 316.

[0179] The above provides an example of the operating principle. Many implementations can be made using these principles.

Claims

1. A filter system, comprising: (a) A supporting grid having a frame and having opposite first and second sides; (b) A first filter, the first filter being oriented along a first side of the support grid; (c) A second filter, which is directly opposite the first filter and oriented opposite to the first filter onto the support grid; and (d) A single clamping system that releasably secures both the first filter and the second filter to the frame; wherein the clamping system comprises: Support tube; A first clamp and a second clamp are slidably mounted at opposite ends of the support tube; A first sliding pin mechanism and a second sliding pin mechanism are slidably mounted on a portion of the support tube; An omega-shaped clamp, which is removably mounted to cover the support tube and slidably accommodates a portion of the first sliding pin mechanism and the second sliding pin mechanism; A first pivot and a second pivot, the first pivot and the second pivot extending through and connecting the omega-shaped clamp and the support tube; each of the first pivot and the second pivot has a hinge point in the support tube and a pivot axis along the length of the support tube between opposite ends of the support tube; and When the first sliding pin mechanism and the second sliding pin mechanism slide to the release position, the omega-shaped clamp, together with the first pivot rod and the second pivot rod, pivots freely along the pivot axis away from the state covering the support tube.

2. The filter system of claim 1, wherein, (a) The first filter includes a peripheral frame having gaskets on the peripheral frame; (b) The second filter includes a peripheral frame, on which a gasket is provided; and (c) A seal is formed, wherein the peripheral gasket of the first filter is located between the first clamp and the second clamp and the peripheral frame of the second filter and abuts against the first clamp and the second clamp and the peripheral frame of the second filter.

3. The filter system of claim 1, wherein, (a) Forming a seal, wherein the peripheral gasket of the second filter is located between the omega-shaped clamp and the frame of the support grid and abuts against the omega-shaped clamp and the frame of the support grid.

4. The filter system of claim 1, wherein, (a) The first filter comprises either a bag filter or a V-type filter; and (b) The second filter includes a V-type filter.

5. A method for repairing a filter mechanism in a filter system according to any one of claims 1-4; The method includes: (a) Release a single clamp that holds both the first filter and the second filter in place and seals them onto the support grid; (b) Remove the first filter while the second filter remains in a sealed engagement with the support grid; as well as (c) Provide a replacement first filter and engage the single clamp to seal the replacement first filter to the support grid.

6. The method of claim 5, further comprising: (a) Before providing the replacement of the first filter, release another portion of the single clamp to remove the second filter; as well as (b) Provide a replacement second filter and engage the single clamp to seal the replacement second filter to the support grid.

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