An outlet piece assembly for a horizontal plate and frame-type filter, such as a tower press

Abstract

The present disclosure relates to an outlet piece assembly (1) for a horizontal plate and frame-type filter, such as tower press. The disclosure is based on the idea of providing the outlet piece assembly (1) as having a base (3) removably attachable to a filter press (e.g., to the filter plate (8) or plate frame (9) thereof), and a lid (4) removably fixed to the 5 base (3), such that an internal conduit (2) of the outlet piece assembly running between a vat end and a discharge end is formed between the base (3) and the lid (4). This enables a part of an associated filtrate vat component, such as the vat liner (5), to be received between the base (3) and the lid (4), thereby ensuring secure sealing between these components.

Description

In addition to improving the wear-resistance characteristics of the outlet piece assembly 1, such a coating further improves sealing of base 3 against the lid 4, and the sealing of the 20      outlet piece assembly 1 against other components, e.g. the filter plate 8 and the filtrate vat component, such as vat liner 5, or a separate filtrate vat. In an embodiment according to the first aspect of the present disclosure, the base 3 comprises one or more first attachment holes 6a extending therethrough for receiving a fixing element 7a attaching the base 3 to the filter press. As discussed above, the base 3 25      may be fixed, for example, to either or both of the filter plate 8 or the plate frame 9 supporting the filter plate 8. Preferably, but not necessarily, the one or more first attachment holes 6a are situated on a portion of the base 3 not forming a part of the internal conduit 2. Such an arrangement, that the fixing elements 7a are less likely to seize due to contamination of the filtrate running in 30      the internal conduit 2. In an embodiment according to the first aspect of the present disclosure, the base 3 comprises one or more second attachment holes 6b, and the lid 4 comprises one or more third attachment holes 6c, aligned with the second attachment holes 6b. The lid 4 is then 2020451849  23 Apr 2025 fixed to the base 3 with a fixing element 7b inserted into the second attachment hole 6b through the third attachment hole 6c. Preferably, but not necessarily, the one or more second attachment holes 6b are situated on a portion of the base 3 not forming a part of the internal conduit 2, and the one or more 5     third attachment holes 6c are situated on a portion of the lid 4 not forming a part of the internal conduit 2. Such an arrangement, that the fixing elements 7b are less likely to seize due to contamination of the filtrate running in the internal conduit 2. Fig. 1 illustrates an outlet piece assembly 1 in connection with a filter plate assembly incorporating an integral filtrate vat and vat liner 5, as seen as an exploded perspective 10      view. In the arrangement of Fig. 1, a filter plate 8, supported by a plate frame 9, integrally forms a filtrate vat 8a. The integral structure of the filtrate vat 8a is provides the filter plate assembly with sufficient creeping-resistant characteristic, while the vat liner 5 protects the filtrate vat from abrasion caused by the solid particles carried by the filtrate. It should be noted that although Fig. 1 depicts only two outlet piece assemblies 1, any number of such 15     outlet piece assemblies may be provided, for example at each corner of the filtrate vat. The outlet piece assembly 1 and the portion of the filter plate assembly encircled in Fig. 1 are illustrated as a more detailed view in Fig. 2. Particularly, Fig. 2 shows the mutual assembly order of the filter plate 8, the base 3, the vat liner 5, and the lid 4. In other words, the base 3 of the outlet piece assembly 1 is attachable to the filter plate assembly with fixing 20     elements 7a insertable through first holes 6a on the base 3. The vat liner 5 is then placed on the filtrate vat 8a formed by the filter plate 8 and the base 3, and the lid 4 is then finally attached to the base 3, on top of the vat liner 5, with fixing element 7b inserted through third holes 6c into second holes 6b. Fig. 3, in turn, illustrates the detailed view of Fig. 2 in a non-exploded configuration. 25      Fig. 4 is a plan view of the arrangement shown in Fig. 1. Particularly, Fig. 1 illustrates a dot- dashed line along, which the partial cut-views of Fig. 5 and Fig. 6 are seen. Fig. 5, illustrates an exploded cut view of the outlet piece assembly 1 along the dashed lined shown in Fig.4, whereas Fig. 6 illustrates the same in a non-exploded configuration. Particularly Fig. 5 and Fig. 6 further illustrating how the base 3 and lid 4 of the outlet piece 30      assembly 1 are arranged with respect to the filter plate 8 and the vat liner 5. Particularly the recessed seat 3a of the base 3 can be seen to be flush with the filtrate vat 8a and that the vat liner 5 extends over the recessed seat 3a. Furthermore, the projections 4a provided as ribs of the lid 4 can be seen to press against the vat liner 5, thereby securely clamping it in place and sealed against the recessed seat 3a. Furthermore, the base 3 can be attached 35     to the plate frame 9 through the filter plate 2. 2020451849  23 Apr 2025 Although the present disclosure has been discussed above in connection with the appended drawings, in which the filtrate vat 8a is integrally formed on the filter plate 8, it should be noted that outlet piece assembly 1 may alternatively also be configured to be used with a conventional separate filtrate vat, in which case the filtrate vat itself extends into 5     the outlet piece assembly 1 in a similar manner as shown with the vat liner 5. Any reference to background art or other prior art in this specification is not an admission that such background art or other prior art is common general knowledge in Australia or elsewhere. In this specification, the term ‘comprising’ is intended to denote the inclusion of a stated 10      integer or integers, but not necessarily the exclusion of any other integer, depending on the context in which that term is used. This applies also to variants of that term such as ‘comprise’ or ‘comprises’. 2020451849  23 Apr 2025 LIST OF REFERENCE NUMERALS 1 outlet piece assembly 1a vat end 1b discharge end 5     2 internal conduit 3 base 3a recessed seat 3b chute 4 lid 10     4a projection 5 vat liner 6a first attachment hole 6b second attachment hole 6c third attachment hole 15     7a first fixing element 7b second fixing element 8 filter plate 8a filtrate vat 9 plate frame

Claims

1. An outlet piece assembly for conducting filtrate out from a filtrate vat of a horizontal filter press, such as a tower press, the outlet piece assembly having an internal conduit for conducting said filtrate,5          wherein the outlet piece assembly comprises:- a base removably attachable to a filter press, and- a lid removably fixed to the base,wherein the internal conduit is formed between the base and the lid, and runs between a vat end and a discharge end of the outlet piece assembly,10           wherein the outlet piece assembly comprises a recessed seat at the vat end thereof,into which a portion of a filtrate vat component, such as a vat liner, or a portion of the filtrate vat is receivable,wherein that the lid comprises one or more projections extending towards the base, and15           wherein the outlet piece assembly is configured for clamping a portion of the filtratevat component, such as the vat liner, or a part of the filtrate vat, received in the recessed seat between the projections and the recessed seat, thereby securing the outlet piece assembly with respect to the portion of the filtrate vat.

2. The outlet piece assembly according to Claim 1, wherein the projections are provided20      as one or more elongate ribs extending in the direction of the internal conduit.

3. The outlet piece assembly according to Claim 1 or Claim 2, wherein a seal arrangement is provided at the recessed seat configured for sealing against the associated part of the filtrate vat component, such as the vat liner, or the associated part of the filtrate vat received at the recessed seat.25     4. The outlet piece assembly according to any one of the preceding Claims 1-3, whereinthe base comprises a recessed chute at the discharge end as a continuation of the recessed seat for conducting filtrate out of the outlet piece assembly.

5. The outlet piece assembly according to any one of the preceding Claims 1-4, wherein at least the base and the lid are made of a creeping-resistant material, preferably chosen30      from a group comprising metals, such as steel, FRP (fibre-reinforce plastics) materials, suchas reinforced composite materials with a thermoset or thermoplastic matrix, and thermoset materials.2020451849  23 Apr 20256. The outlet piece assembly according to any one of the preceding Claims 1 -5, wherein at least the portions of the base and lid forming the internal conduit are coated with a wearresistant material, preferably chosen from a group comprising wear resistant polymers, such as thermoplastics including thermoplastic vulcanizates and thermoplastics elastomers, 5     PUR and rubber.

7. The outlet piece assembly according to any one of the preceding Claims 1 -6, wherein the base comprises one or more first attachment holes extending therethrough for receiving a fixing element attaching the base to the filter press.

8. The outlet piece assembly according to Claim 7, wherein the one or more first 10      attachment holes are situated on a portion of the base not forming a part of the internalconduit.

9. The outlet piece assembly according to any one of the preceding Claims 1 -8, wherein the base comprises one or more second attachment holes, and the lid comprises one or more third attachment holes, aligned with the second attachment holes, the lid being fixed 15     to the base with a fixing element inserted into the second attachment hole through the thirdattachment hole.

10. The outlet piece assembly according to Claim 9, wherein the one or more second attachment holes are situated on a portion of the base not forming a part of the internal conduit, and the one or more third attachment holes are situated on a portion of the lid not 20     forming a part of the internal conduit.

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