HRP20170771T1 - Improved vacuum drier for industrial hides - Google Patents

Claims (12)

1. Vacuum dryer (1) for drying industrial leather (P), includes; - a body containing a supporting structure (2) with at least one pair of end supports (4,5) which have means for vertical guidance (11), a lower base (6) and an upper cover (7); - a plurality of reciprocally placed and extremely horizontal plates (12) with the purpose of supporting the skin (P) during its drying, which are peripherally sealed and connected to each other and to the mentioned cover (7) in order to determine the corresponding vacuum chambers (15) for sucking the vapors coming out of the skin (P); - a means for vertically moving said plates (12) along said guide means (11) driven by a power supply unit (16); - heating means connected to said plates (12) for heating the skin (P), connected to the heating unit (17); - a vacuum means (26) designed to be partially connected to said plates (12) for sucking the steam coming out of the skin (P) from said chambers (15); - monitoring means (29) for monitoring said moving means, said heating means and said vacuum means (26) - a suction line for connecting said vacuum chambers (15) with said vacuum means (26), this line has at least one pipeline (30) connected to said vacuum chambers (15) of said plates (12) by connecting pipes (31); characterized in that said vacuum means (26), said power supply unit (16), said heating unit (17) and said monitoring means (29) are placed on said supporting structure (2) within the ground plan of the machine body and are not in in a separate assembly, said at least one steam pipeline (30) is directly connected to at least one support (4) near said plates (12) therefore minimizing the length of said connecting pipes (31), the length of said circuit, the volume of suction steam and the evacuation time of said vacuum chambers (15). 2. A dryer according to claim 1, wherein said vacuum means (26) is connected to at least one steam pipe (30) via at least one connecting channel (35) united with said at least one support (4). 3. Dryer according to claim 1, wherein said suction line comprises, for each plate (12) near its longitudinal ends, a pair of seats (32) having a plurality of openings (33) for suction of steam from vacuum chambers (15) ) and have at one longitudinal end a connector (34) for connecting the pipe (31). 4. A dryer according to claim 1, wherein said at least one steam pipe (30) is substantially vertical and has a plurality of connections (41) for said connecting pipes (31), uniformly distributed along its vertical extension. 5. A dryer according to claim 2, wherein said at least one suction channel (35) has a distinctly vertical connecting part to said at least one steam pipeline (30) and condensate separator (42). 6. A dryer according to claim 1, wherein a pair of steam pipes (30) is placed in highly symmetrical positions with respect to a central vertical plane (V) passing through said longitudinal axis (L) for conducting steam collected in said longitudinal lateral seats (32) of said plates (12), said pair of steam pipes (30) is in pivoted connection with a pair of feed channels (35) similarly placed on the same support (4) in an expressively symmetrical relationship to said vertical center plane (V). 7. Dryer according to patent claim 3, wherein each of the said side seats (32) has at one longitudinal end an outlet hose (38) for evacuating the condensate formed in the corresponding condenser (36), said outlet hose (38) has an end with with an automatic valve (39) for drying the condensate collected in the mentioned seats (32) and conducted into a very vertical collecting gutter (40). 8. Dryer according to patent claim 1, wherein said connecting pipes (31) are flexible and made of a wear-resistant material suitable for enabling strong multidirectional bending of the pipes due to the reduction of their connecting length when connecting each seat (32) to the corresponding steam pipeline (30). 9. A dryer according to claim 1, wherein said heating means comprises a coil placed within each plate (12), wherein the heating fluid flows through flexible pipes connected to a corresponding heat exchanger (17'). 10. Dryer according to claim 1, wherein said means for moving said plates (12) comprises at least one plurality of hydraulic cylinders powered by said power supply unit (16). 11. A dryer according to claim 1, wherein said power supply unit (16) and said monitoring means (29) are placed on the upper surface (7') of said cover (7) which defines the movement surface for maintenance and supervisory personnel , said heating unit (17) is placed on said at least one support (4). 12. Dryer in accordance with patent claim 1, wherein each of the mentioned supports (4, 5) is formed by at least one pair of columns (8, 9), each of which is made of two parts (8', 8", 9', 9"), respectively the upper part (8', 9') can be separated from the lower part (8", 9") and from the said cover (7), the said lower part (8", 9") is unique with the said base (6), said upper parts (8', 9') are designed to be removable while said panels (12) and said cover (7) are designed to be compact to allow a single unit for transport, leaving all others unchanged links to minimize setup time.