Apparatus, method and system for vibratory screening

Abstract

Disclosed embodiments include a screen plate assembly that can be mounted on a vibratory screening machine. The screen plate assembly includes a plurality of elongate support members extending in a first direction. A plurality of support bars are mounted on the elongate support member. The support members and the support bars form a screen support surface. The support bar extends in a direction transverse to the support member.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 438,899, filed January 13, 2023, the disclosure of which is incorporated herein by reference in its entirety. BRIEF DESCRIPTION OF THE DRAWINGS

[0002] Figure 1 is an isometric view of a screen panel with a screen assembly mounted thereon, according to an embodiment of the present disclosure.

[0003] Figure 2 According to an embodiment of the present disclosure, Figure 1 An enlarged isometric view of a portion of a screen deck shown without the screen assembly installed and incorporated into a vibrating screening machine.

[0004] Figure 3 is an isometric view of a screen panel with a screen assembly mounted thereon, according to an embodiment of the present disclosure.

[0005] Figure 4A is a partial cross-sectional view of a portion of a screen element according to an embodiment of the present disclosure.

[0006] Figure 4B According to an embodiment of the present disclosure, Figure 4A An enlarged view of a portion of the screen element is shown.

[0007] Figure 5 is a perspective view of a screen element incorporating a reinforcement member according to an embodiment of the present disclosure.

[0008] Figure 6 is a perspective view of a screen panel including support rods mounted on longitudinal beams according to an embodiment of the present disclosure.

[0009] Figure 7 According to an embodiment of the present disclosure, similar to Figure 6 A perspective view of a screen panel is shown with the screen mounted on stringers and support rods.

[0010] Figure 8 is a cross-sectional view showing how the support bars of the screen panel of the first embodiment are installed on top of the longitudinal beam according to an embodiment of the present disclosure.

[0011] Figure 9 is a perspective view of a support rod that may be integrated into a screen deck assembly according to an embodiment of the present disclosure.

[0012] Figure 10 is a cross-sectional view showing how support bars of a screen panel of a second embodiment are installed on top of a longitudinal beam according to an embodiment of the present disclosure.

[0013] Figure 11is a cross-sectional view showing how the support bars of the screen panel of the third embodiment are installed on top of the longitudinal beam according to an embodiment of the present disclosure.

[0014] Figure 12 is a cross-sectional view showing how support bars of a screen panel of a fourth embodiment are installed on top of a longitudinal beam according to an embodiment of the present disclosure.

[0015] Figure 13 is a perspective view of a screen panel having stringers forming part of the screen panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0016] The disclosed embodiments generally relate to screen deck assemblies for screening materials and separating materials of different sizes.The disclosed embodiments include one or more screen decks and a supported screen assembly for use with a vibrating screening machine.

[0017] Exemplary vibratory screening systems are disclosed, for example, in US Pat. Nos. 6,431,366 B2 and 6,820,748 B2, which are incorporated herein by reference.

[0018] In one embodiment, a screen deck assembly is provided that is mountable on a vibrating screening machine. The screen deck assembly includes a plurality of elongated support members extending in a first direction. A plurality of support rods are mounted on the elongated support members. The support members and the support rods form a screen support surface. The support rods extend in a direction transverse to the support members.

[0019] In an embodiment, the vibrating screening machine includes a vibrating motor assembly that is fixed to the inner frame of the vibrating screening machine and is configured to vibrate. At least one screen plate assembly is configured to receive one or more replaceable screen assemblies. The screen plate includes a plurality of longitudinal beams arranged substantially parallel to each other. A plurality of support rods are mounted on the longitudinal beams. Each support rod extends between at least two of the longitudinal beams and is coupled to the at least two of the longitudinal beams. The longitudinal beams and the support rods are configured to support one or more stacked screen assemblies. The screen assembly can be secured to the screen plate assembly by tensioning the screen assembly, for example, in the direction in which the material to be screened flows through the screen assembly, or in a direction transverse to the direction in which the material to be screened flows through the screen assembly. The small-size material discharge assembly can be configured to receive material that passes through the screen assembly, and the large-size material discharge assembly can be configured to receive material that passes through the top surface of the screen assembly.

[0020] Figure 1 and Figure 2 Various views of an exemplary screen panel or screen panel assembly 100 are shown. More specifically, Figure 1 An isometric perspective view of the screen panel assembly 100 is shown, and Figure 21 shows a screen panel assembly attached to a screening machine. The screen panel assembly 100 includes a first screen panel 110, a second screen panel 120, side channels 130 and 130', a flush tray 140, and a tensioning device 150. Figure 1 As shown, the first screen deck 110 and the second screen deck 120 are covered by the first screen assembly 109 and the second screen assembly 119, respectively. Portions of the screens 109 and 119 are cut away to reveal various aspects of the screen decks 110 and 120 beneath the screens. The first screen assembly 109 and the second screen assembly 119 are replaceable screen assemblies that are attached to the first screen deck 110 and the second screen deck 120. During operation, the material 50 to be screened by the vibrating screening machine is discharged from the feed outlet pipe of the feed assembly (not shown) along the feed end 109A of the first screen assembly 109 to the raised side of the first screen assembly 109. Under the action of the vibration, the material 50 passes through the first screen assembly 109 of the first screen deck 110, passes over the discharge end 109B of the first screen assembly 109, and enters the flushing tray 140.

[0021] In this exemplary embodiment, vibrations propel material 50 across flush tray 140, where it passes through feed end 119A of second screen assembly 119. Material 50 strikes second screen assembly 119 in screen impact area 148 and, under the action of vibrations, passes through second screen assembly 119 on second screen deck 120 and over discharge end 119B of second screen assembly 419. First and second screen assemblies 109, 119 are configured to allow small-sized material to pass through first and second screen assemblies 109, 119 and fall into a small-sized material collection tray (not shown) and be directed to a small-sized collection assembly (not shown). Large-sized material is unable to pass through screens 109 and 119 and, under the action of vibrations, is discharged from discharge end 119B and directed to a large-sized collection assembly. The direction of flow of material 50 is indicated by arrows.

[0022] Figure 2 A partial side perspective view of the screen panels 110 and 120, the rinse tray 140, the side channel 130, and a portion of the tensioning device 150 is shown. Figure 2 As shown, the first and second sieve plates 110 and 120 do not include screens 109 and 119, but it will be appreciated that when used to separate materials of different sizes, the first and second sieve plates 110 and 120 are covered by screens 109 and 119, and that these screens can be replaced when worn or damaged.

[0023] Reference Figure 2, the first screen panel 110 includes a lower rib 112, a longitudinal beam 114 (e.g., a support structure), an upper end plate 116, and a lower end plate 118. The second screen panel 120 includes a lower rib 122, a longitudinal beam 124, an upper end plate 126, and a lower end plate 128. The opposite ends of the ribs 112 and 122 extend from side channels 130 and 130' at each of the midpoints between the upper end plate 116 and the lower end plate 118 of the first screen panel 110 and the midpoint between the upper end plate 126 and the lower end plate 128 of the second screen panel 120, respectively. A plurality of longitudinal beams 114 and 124 extend from the upper end plates 116 and 126 to the lower end plates 118 and 128, respectively. The midpoint 115 of each longitudinal beam 114 and the midpoint 125 of each longitudinal beam 124 span the top surfaces of the ribs 112 and 122, respectively. Midpoints 115 and 125 can be raised relative to the opposite ends of longitudinal beams 114 and 124 so that longitudinal beams 114 and 124 can (but not necessarily) form an "arch" or convex bend on the first screen panel 110 and the second screen panel 120. Alternatively, longitudinal beams 114 and 124 can form a concave profile or a flat profile on the first and second screen panels. Although the first screen panel 110 and the second screen panel 120 are shown with single ribs 112 and 122, respectively, it should be understood that the first screen panel 110 and the second screen panel 120 can include other configurations. The first screen panel 110 and the second screen panel 120 can include a first plurality of ribs and a second plurality of ribs, respectively, as long as the extra ribs provide the functions described herein. In some embodiments, at least one of the first plurality of ribs and the second plurality of ribs (or in some embodiments, each) can be assembled similarly to ribs 112 or ribs 122. Longitudinal beams 114 and 124 can be fixed (e.g., welded) to the ribs 112, 122 below. Alternatively, the stringers 114 and 116 may be replaceable units and may be secured to the ribs using various fasteners, such as bolts.

[0024] Figure 3 is an isometric view of a screen panel 200 with a screen assembly 202 mounted thereon, according to one or more embodiments of the present disclosure. In this embodiment, the screen panel 200 may employ a tensioning mechanism that holds the screen assembly 202 by providing side-to-side tension, similar to, for example, Figure 1 and Figure 2 The embodiment shown provides fore-aft tensioning in an end-to-end manner. In this example, the tensioning mechanism provides tension to the screen assembly 202 from above, as described in more detail in U.S. Patent No. 9,010,539, which is incorporated herein by reference in its entirety. The tensioning mechanism in the screen panel 200 that applies tension from above is also similar to the embodiment shown in FIG. Figure 1 and Figure 2 The latter is in stark contrast to the embodiment of the invention, which applies tension from below via a ratchet mechanism.

[0025] The screen panel 200 includes a screen assembly 202 in a first screening portion of the screen panel 200. The screen assembly is not shown in the second screening portion of the screen panel 200 to expose a plurality of ribs 204 that provide structural support for a plurality of longitudinal beams 206. Figure 2 As described above, stringers 206 provide structural support to screen assemblies such as screen assembly 202. In this example, ribs 204 extend between side channels 208a and 208b. Stringers 206 extend from end plates 210a to 210b. The midpoint 212 of each stringer 206 spans the top surface of the central rib of ribs 204. In this example, midpoint 212 is elevated relative to the opposite end of stringers 206 so that stringers 206 form an "arch" or convex bend on the screening portion of screen deck 200.

[0026] The longitudinal beam 206 can be a replaceable unit and can be fastened to the rib 204 instead of being welded to the rib 204. Various fasteners (such as bolts) can be used to fasten the longitudinal beam 206 to the rib 204. This configuration eliminates the dense weld joints between the rib 204 and the longitudinal beam 206 that are common in welded screen panels. This arrangement eliminates the shrinkage, thermal deformation and sagging associated with dense weld joints and makes it possible to quickly replace worn or damaged longitudinal beams 206 on site. The replaceable longitudinal beam 206 can include plastic, metal and / or composite materials and can be manufactured by casting and / or injection molding. The screening system of other embodiments may include removable and replaceable longitudinal beams.

[0027] Figure 4A A partial cross-sectional view of a portion of a screen 400 that can be used in a screen panel assembly as described above is shown. The screen 400 includes first members 402 extending parallel to each other across the screen. Second members extending in a direction perpendicular to the first members 402 form a grid structure with the first members 402. The screen 400 also includes third members 404 extending in a direction parallel to the first members 402 and periodically formed along the screen 400. The third members 404 are thicker than the first members 402 in both width and height. Figure 4B As shown in the enlarged view of FIG, reinforcing rods 406 are enclosed in the material of each third member 404. Reinforcing rods 406 are provided to help screen cloth 400 maintain a uniform, substantially flat shape when screen cloth 400 is placed on the ribs and / or stringers of the screen panel. In other words, reinforcing rods 406 help prevent the screen cloth from sagging between adjacent stringers or ribs of the screen panel. Reinforcing rods 406 can also provide additional strength to screen cloth 400.

[0028] Figure 5An alternative embodiment of a screen 410 that can be used in a screen panel assembly as described above is shown. In this embodiment, the screen 410 includes a first member 412 extending parallel to each other along a first direction. A second member 414 extends parallel to each other along a second direction perpendicular to the first direction, thereby forming a grid array with the first member 412. A reinforcing element 416 is molded into the material of the first member 412, and a similar reinforcing element 418 is molded into the material of the second member 414. Here again, the reinforcing elements 416 and 418 are provided to help the screen 410 maintain a uniform, substantially flat shape when the screen 410 is placed on the ribs and / or longitudinal beams of the screen panel. Typically, at least a portion of such reinforcing elements 416 and / or 418 is oriented horizontally or perpendicular to the longitudinal beams. Therefore, the reinforcing elements help prevent the screen 410 from sagging between adjacent longitudinal beams or ribs of the screen panel. The reinforcing elements 416 and 418 can also provide additional strength to the screen 410 to help resist stretching or elongation of the screen 410. In other embodiments, a set of reinforcing elements 416 or 418 may be omitted. Furthermore, such reinforcing elements 416 or 418 may not be included in every first member 412 or second member 414. For example, reinforcing elements 416 or 418 may be included in every other or every third first member 412 or second member 414, respectively.

[0029] like Figure 4A 、 Figure 4B and Figure 5 Details of the screen shown may be found in US Patent No. 9,908,150, which is incorporated herein by reference in its entirety.

[0030] In the above-mentioned example, reinforcing bar or reinforcing element can be molded in the material of screen cloth itself.This can be carried out together in conjunction with the molding of the screen cloth formed by thermosetting material (such as polyurethane).Yet other types of screen cloth, as the screen cloth by thermoplastic material injection molding also can be integrated reinforcing bar or reinforcing element.In addition, independent reinforcing bar or reinforcing element can be attached to the screen cloth by adhesive, welding, fusion and other attachment techniques.Therefore, the screen cloth that is used for vibratory screening machine can comprise various types of reinforcing bar or reinforcing element, and reinforcing bar or reinforcing element can be integrated in the screen cloth or be attached to the screen cloth by a variety of different ways.

[0031] No matter how the screen cloth that comprises reinforcing bar or reinforcing element is formed, the comprising of reinforcing bar or reinforcing element all can increase the cost and complexity of screen cloth.The manufacturing process that produces the required for this type of screen cloth is necessarily more complicated and expensive than the screen cloth that does not comprise reinforcing bar or reinforcing element.Also, in case reinforcing bar or reinforcing element become the part of screen cloth, their existence in screen cloth will limit the packing and the mode of transportation of screen cloth.In most of the cases, wish that reinforcing bar or reinforcing element keep its general shape, and this may make and cannot be wound up or folded screen cloth to reduce its packing and transportation size in some way.In addition, comprising this type of reinforcing bar or element can cause screen cloth to be discarded when producing extra waste.

[0032] Figure 6 The screen deck 420 of a vibrating screening machine is shown, which includes support rods 424 mounted on the top edge of the longitudinal beams 422 of the screen deck. The support rods 424 are provided to support the screen mounted on the top of the screen deck 420 so that the screen does not sag between adjacent longitudinal beams 422. Therefore, the support rods 424 perform some of the same functions as the reinforcing rods or reinforcing elements provided in the screen deck described above. When the support rods 424 are as Figure 6 When shown mounted on the stringers 422 of the screen panel 420, screen panels that do not include reinforcing rods or reinforcing elements can be mounted on the screen panel 420 without worrying about the screen panels sagging between adjacent stringers 422. The screen panel 420 can additionally include one or more optional ribs 440 that extend across the lower portions of the stringers 422. These ribs 440 can provide support. These rods 420 are integrated into the screen panel 420 to allow for reuse of the rods 420 when replacing stacked screen panels.

[0033] Figure 7 A screen panel 420 is shown including support rods 424 mounted on top of longitudinal beams 422 of the screen panel 420 with a screen 430 mounted above the screen panel 420 .

[0034] Figure 8 FIG. 4 is an enlarged cross-sectional view showing how the support rod 424 is mounted in the mounting hole 426 located on the top edge of the longitudinal beam 422. The screen 430 is superimposed on the longitudinal beam 422 and the support rod 424. Figure 8 As shown, the depth of the mounting holes 426 is such that the top surface of the support rod 424 is substantially flush with the top edge of the longitudinal beam 422 . Figure 8 It is also shown that the profile of the mounting hole 426 can match the outer profile of the support rod 424.

[0035] The support rod 424 can be formed from a variety of different materials. The support rod 424 can be formed from metal, composite materials, fiberglass, carbon fiber, resin, and various other similar materials.

[0036] Each support rod 424 can be a single unitary structure, or each support rod can have a composite structure. For example, Figure 9 An embodiment of a support rod 434 is shown, comprising a core 435 surrounded by a sheath 437. The core 435 can be made of a relatively rigid material, such as metal, fiberglass, carbon fiber, or a hard plastic or composite material. The sheath 437 can be made of a softer material, such as a plastic or composite material.

[0037] The sheath 437 can have a degree of deformability to facilitate insertion of the support rod 434 into the mounting hole 426 of the longitudinal rail 422. The sheath 437 can also be sized to substantially or completely fill the mounting hole 426 in which the support rod 434 is mounted. This can help prevent the support rod 434 from moving relative to the longitudinal rail 422 in which it is mounted, which in turn can help prevent vibration and wear of the support rod 434 and the longitudinal rail 422.

[0038] The support rods 424 can have a variety of cross-sectional shapes or profiles. Figures 6 to 12 In the illustrated embodiment, support bar 424 / 434 has a circular cross-sectional shape. In an alternative embodiment, support bar 424 / 434 can have square, triangle, ellipse, polyhedron or some other cross-sectional shapes. In addition, support bar 424 / 434 can be flat or straight, or has arc, arch or curved shape, and this depends on the shape of the sieve plate to which it is attached. In other words, the shape of support bar 424 / 434 can change to adapt to the shape or the profile of the sieve plate to which it is attached.

[0039] Similarly, the mounting holes 426 in the stringer 422 can have different shapes. In some embodiments, the profile of the mounting holes 426 can match the outer profile of the support rod 424 mounted in the mounting holes 426. In other cases, the profile of the mounting holes 426 can be different from the outer profile of the support rod 424.

[0040] Figure 8 An embodiment is shown in which the depth of the mounting holes 426 and the diameter of the support rods 424 are selected so that the top surface of the support rods 424 is substantially flush with the top surface of the longitudinal beams 422. This allows the screen 430, having a substantially flat lower surface, to lie flat on the support surface formed by the longitudinal beams 422 and support rods 424.

[0041] In an alternative embodiment, if Figure 10As shown, the screen 430 can be formed such that the bottom surface of the screen 430 includes a positioning slot 428. The positioning slot 428 is designed to cover and mate with the corresponding support rod 424. Therefore, in this embodiment, the depth of the mounting hole 426 is such that the top surface of the support rod 424 protrudes above the top edge of the longitudinal beam 422. This allows the top surface of the support rod 424 to be received in the slot 428 on the bottom surface of the screen 430.

[0042] exist Figure 10 In the illustrated embodiment, the support rods 424 have a circular cross-sectional shape, and the grooves 428 on the bottom surface of the screen 430 have a corresponding circular profile. In alternative embodiments, the support rods 424 can have a different cross-sectional shape, and the profile of the grooves 428 on the bottom surface of the screen 430 can have a correspondingly different shape.

[0043] Figure 11 An embodiment is shown in which the shape of the mounting holes 426 on the top edge of the longitudinal beam 422 helps to retain the support rod 424 in the mounting holes 426. Figure 11 In the illustrated embodiment, mounting hole 426 has a generally circular cross-sectional shape to match the cross-sectional shape of support rod 424. However, the size of the opening of mounting hole 426 along the top edge of longitudinal beam 422 is smaller than the diameter of support rod 424. Therefore, inserting support rod 424 into mounting hole 426 requires temporary elastic deformation of the material of longitudinal beam 422 and / or support rod 424. Once support rod 424 is positioned in mounting hole 426, the material of longitudinal beam 422 and / or support rod 424 substantially returns to its original shape, which results in support rod 424 being retained in mounting slot 426.

[0044] Figure 12 Another embodiment is shown in which the size of the top opening of the mounting hole 426 is also smaller than the diameter of the support rod 424. Here again, inserting the support rod 424 into the mounting hole 426 requires temporary elastic deformation of the material of the longitudinal beam 422 and / or the support rod 424. Once the support rod 424 is positioned in the mounting hole 426, the material of the longitudinal beam 422 and / or the support rod 424 substantially returns to its original shape, which results in the support rod 424 being captured in the mounting slot 426.

[0045] Figure 12 An example is also provided to illustrate that the profile of the mounting hole 426 need not match the outer cross-sectional shape of the support rod 424. In fact, the profile of the mounting slot 426 and the cross-sectional shape of the support rod 424 can be intentionally selected to be different for various reasons (e.g., to help secure the support rod 424 within the mounting hole 426).

[0046] In the above embodiment, the stringer 422 can be formed from a variety of materials. In some cases, a wear-resistant protective sheath can be installed on the top of the stringer. When a wear-resistant protective sheath is provided, mounting grooves 426 can be formed in both the top edge of the stringer and the protective sheath. Alternatively, the top edge of the stringer can be free of support rod mounting grooves, and support rod mounting grooves can be provided only in the protective sheath installed on the top of the stringer.

[0047] Figure 13 An alternative embodiment is shown in which a metal stringer 432 forms part of the screen panel 420. Here again, mounting holes are formed in the top edge of the stringer 432, and support rods 434 are mounted in the mounting holes. Thus, in some embodiments, the stringer 432 can be formed of a metal material and not have any type of wear-resistant protective sheathing.

[0048] In the aforementioned embodiment, the support rods are mounted in mounting holes on the top edge of the stringers. In alternative embodiments, the support rods 424 can be attached to the stringers 422 using fasteners, adhesives, welding, fusion, and various other methods. In some embodiments, the support rods 424 are removably attached to the stringers 422 so that individual support rods can be replaced, and thus individual stringers can be replaced. In alternative embodiments, the support rods 424 can be secured to the stringers in a more stable manner, such as by fusion, adhesives, and / or welding.

[0049] In the above embodiment, the support rods extend in a direction substantially perpendicular to the direction in which the longitudinal beams extend. In alternative embodiments, the support rods may extend in a direction not perpendicular to the direction in which the longitudinal beams extend. For example, the support rods may form an angle of 30° or 45° relative to the longitudinal beams, or some other angle other than 90°.

[0050] In the above embodiment, a plurality of stringers can have a midpoint that is elevated relative to the first and second ends between the first end and the second end. In such an embodiment, the stringers can form an "arch" or convex bend on the screen deck. In an alternative embodiment, a plurality of stringers can have a midpoint that is recessed relative to the first and second ends between the first end and the second end. In such an embodiment, the stringers can form a concave bend on the screen deck. In a further alternative embodiment, a plurality of stringers can have a linear profile between the first and second ends, forming a substantially flat surface on the screen deck.

[0051] Unless explicitly stated otherwise, or understood otherwise from the context, conditional language such as "can / could," "might / may," and the like is generally intended to convey that certain embodiments may include, while other embodiments do not include, certain features, elements, and / or operations. Thus, such conditional language is generally not intended to imply that features, elements, and / or operations are in any way required by one or more embodiments, or that one or more embodiments necessarily include logic for determining whether such features, elements, and / or operations are included in any particular embodiment or are to be performed in any particular embodiment, regardless of user input or prompting.

[0052] Although the embodiments of the present disclosure are described with reference to various embodiments, it should be noted that these embodiments are illustrative and the scope of the present disclosure is not limited to them. Those skilled in the art will recognize that many further combinations and arrangements of the disclosed features are possible. Therefore, various modifications may be made to the present disclosure without departing from its scope or spirit. Additionally or alternatively, other embodiments of the present disclosure may be apparent from consideration of the specification and drawings, as well as the practice of the present disclosure presented herein. The examples set forth in the specification and drawings are illustrative and not restrictive. Although specific terms are used herein, they are used in a general and descriptive sense only and not for limiting purposes.

Claims

1. A screen plate for use in a vibrating screening machine, comprising: configured to be mounted to a frame of a vibrating screening machine; a plurality of longitudinal beams mounted on the frame and arranged substantially parallel to one another; as well as A plurality of support bars are mounted on the longitudinal beams, wherein each support bar extends between and is coupled to at least two of the longitudinal beams, and wherein the longitudinal beams and support bars are configured to support a screen assembly.

2. The screen deck of claim 1, wherein the plurality of longitudinal beams extend in a first direction, and wherein at least some of the plurality of support rods extend in a second direction transverse to the first direction.

3. The screen panel of claim 1, wherein the second direction is substantially perpendicular to the first direction.

4. The screen panel according to claim 1, wherein mounting holes are provided in upper portions of the longitudinal beams, and wherein each support rod is at least partially located in the mounting holes of two or more longitudinal beams.

5. The screen panel of claim 4, wherein the depth of the mounting holes and the cross-sectional dimensions of the support rods are such that when the support rods are located within the corresponding mounting holes, the top edges of the support rods are at substantially the same height as the top edges of the longitudinal beams in which the support rods are mounted.

6. The screen panel of claim 4, wherein the depth of the mounting holes and the cross-sectional dimensions of the support bars are such that when the support bars are positioned within the corresponding mounting holes, the top edges of the support bars are higher than the top edges of the longitudinal beams in which the support bars are mounted.

7. The screen plate according to claim 4, wherein an opening is formed at a top of each mounting hole, and wherein a width of the opening of each mounting hole is smaller than a diameter of a support rod located in the mounting hole.

8. The screen panel of claim 4, wherein an inner profile of the mounting hole substantially matches a cross-sectional shape of the support rod.

9. The screen panel of claim 4, wherein an inner profile of the mounting hole is different from a cross-sectional shape of the support rod.

10. The screen panel of claim 4, wherein each of the plurality of support rods comprises a core and a sheath surrounding the core, and wherein the sheath of each support rod is formed of a deformable material such that the sheath is capable of at least partially deforming when the support rod is inserted into a corresponding mounting hole of a longitudinal beam.

11. The screen panel of claim 1 , wherein each of the plurality of support rods comprises a core and a sheath surrounding the core.

12. The screen deck of claim 1, wherein each of the plurality of stringers has an upper surface defining a convex profile.

13. The screen deck of claim 1, wherein each of the plurality of stringers has an upper surface defining a linear profile.

14. The screen plate of claim 1 , further comprising: At least one rib extends between and is coupled to at least two of the stringers, wherein the rib is located below a top edge of the stringer to which it is coupled.

15. A vibrating screening machine incorporating the screen plate of claim 1.

16. A longitudinal beam for a screen deck of a vibrating screening machine, comprising: an elongated body configured to be attached to a screen deck assembly for a vibratory screening machine; as well as A plurality of mounting holes are formed along a top edge of the elongated body, wherein each mounting hole is configured to receive a support rod, the support rod being used together with the elongated body to support the screen assembly.

17. The stringer of claim 16, wherein each mounting hole includes an opening located on a top edge of the elongated body and an inner surface forming a recess extending inwardly from the top edge of the elongated body.

18. The longitudinal beam of claim 17, wherein an inner surface of each mounting hole has a profile that matches a cross-sectional shape of a support rod to be mounted in the mounting hole.

19. The longitudinal beam of claim 17, wherein an inner surface of each mounting hole has a profile that is different from a cross-sectional shape of a support rod to be mounted in the mounting hole.

20. The longitudinal beam of claim 7, wherein a width of an opening of each mounting hole is smaller than a width of a support rod to be mounted in the mounting hole.

21. A longitudinal beam assembly for a screen deck of a vibrating screening machine, comprising: The longitudinal beam as claimed in claim 16; as well as A stringer cover is configured to be mounted on top of the elongated body, wherein the stringer cover includes a plurality of mounting holes corresponding to the mounting holes of the elongated body.

22. A longitudinal beam assembly for a screen deck of a vibrating screening machine, comprising: an elongated body configured to be attached to a screen deck assembly for a vibratory screening machine; as well as A stringer cover is configured to be mounted on the top of the elongated body, wherein a plurality of mounting holes are formed along a top edge of the stringer cover, wherein each mounting hole is configured to receive a support rod, wherein the support rod will support the screen assembly together with the elongated body and the stringer cover.

23. The longitudinal beam assembly of claim 22, wherein an opening is formed at a top of each mounting hole, and wherein a width of the opening of each mounting hole is smaller than a diameter of a support rod to be positioned within the mounting hole.

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