Arrangement in a perforated roll of a fiber web machine and prefabricated sensor sheet for a perforated roll of a fiber web machine
AssigneeValmet Technologies Oy
InventorsKari Röyskö, Heikki Kettunen, Tatu Pitkänen
Life of this patent
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Abstract
A perforated roll (10) of a fiber web machine includes a roll shell (19), holes (13) extending through the roll shell, and a sensing system (14) arranged in the roll shell. The sensing system (14) includes at least one pair of leads (16), to which one or more sensors (15) have been connected. At least one pair of leads is composed of flat leads (17.2, 17.2), which are arranged in the roll shell side by side. A prefabricated sensor sheet (26) may be prepared for a perforated roll of a fiber web machine, such that holes may be drilled therethrough to communicate with the roll shell holes (13).
Claims15
An arrangement in a perforated roll of a fiber web machine, the arrangement comprising:
- a roll shell;
- a plurality of first holes extending through the roll shell;
- a sensing system arranged in the roll shell, which sensing system includes at least one pair of leads, to which one or more sensors are connected, wherein the at least one pair of leads comprise a pair of elongated flat leads which have been arranged on the roll shell side by side, each flat lead has a width extending along the surface of the roll shell which is greater than its thickness extending radially outward from the roll shell;
- and
- wherein the first holes have a first diameter, and wherein the width of each of the flat leads is greater than the first diameter of the first holes.
A prefabricated sensor sheet for mounting to a perforated roll of a fiber web machine, wherein the perforated roll has a roll shell and a plurality of first holes of a first diameter extending through the roll shell, the prefabricated sensor sheet comprising:
- an elongated strip equipped with an adhesive surface on one side for engagement with the perforated roll;
- at least two parallel flat leads on a surface of the elongated strip opposite the adhesive surface, the leads having a thickness extending away from the surface and a width on the surface and forming at least one pair of leads;
- at least one sensor connected to the pair of leads and supported on the surface of the elongated strip opposite the adhesive surface;
- and
- wherein the width of each of the flat leads is greater than the first diameter of the first holes.
A perforated roll for a fiber web machine, comprising:
- a cylindrical roll shell having an outer surface, wherein portions of the roll shell define a plurality of first holes of a first diameter which extend through the outer surface and the roll shell;
- a first flat lead having a first width extending along the outer surface of the roll shell which is greater than its thickness extending radially outward from the roll shell, wherein the first width is greater than the first diameter of the first holes, the first flat lead extending over the outer surface of the roll shell such that at least one of the plurality of first holes extends through the first flat lead;
- a second flat lead having a second width extending along the outer surface of the roll shell which is greater than its thickness extending radially outward from the roll shell, wherein the second width is greater than the first diameter of the first holes, the second flat lead alongside and spaced from the first flat lead and extending over the outer surface of the roll shell such that at least one of the plurality of first holes extends through the second flat lead;
- and
- one or more sensors which are connected to the roll shell and connected between the first flat lead and the second flat lead.
Dependencies are inferred from the claim text.