Scraper blade attachment apparatus and method with split pin
An attachment apparatus and method for interlocking attachment of a scraper blade with a drive shaft of a scraped surface heat exchanger includes a blade having dual attachment beams and a central locking member, and at least one pin having dual fingers each for interlocking with a respective attachment beam.
1. A pin for attaching a blade to a drive shaft of a scraped surface heat exchanger, the pin comprising:
a base portion; and
two generally hook-shaped arm portions extending from the base portion and separated by a gap therebetween,
wherein the pin attaches the blade to the drive shaft of the scraped surface heat exchanger.
2. A pin according to claim 1 , wherein each arm portion has a first flat surface, a second flat surface generally perpendicular to the first flat surface, and a generally semi-circular concave surface extending from the second flat surface in opposed facing relationship to the first flat portion.
3. A pin according to claim 2 , further comprising a saddle indentation disposed on the first flat portion between the two arms.
4. A pin according to claim 1 , wherein the two arms and the gap together form a width greater than a width of the base.
5. A blade for use with a scraped surface heat exchanger having a drive shaft, the scraped surface heat exchanger blade comprising:
at least one attachment region including a pair of cutouts each having a respective attachment beam extending across the respective cutout portion.
6. A blade according to claim 5 , wherein the attachment beams are adopted to be received by respective arms of an attachment pin mounted to the drive shaft.
7. A blade attaching system for use with a scraped surface heat exchanger having a drive shaft, comprising:
a scraped surface heat exchanger blade having at least one attachment region including a pair of cutouts each having a respective attachment beam extending across the respective cutout portion; and
a pin having a base and two generally hook shaped arms extending from the base and generated by a gap there between, wherein each hooked shape arm is adapted to receive and hold a respective attachment beam of the scraped surface heat exchanger blade.
8. A system according to claim 7 , wherein the scraped surface heat exchanger blade comprises two attachment regions each having two cutouts, and wherein the system comprises two pins mounted to the drive shaft.
9. A pin for attaching a blade to a drive shaft of a scraped surface heat exchanger, the pin comprising:
means for mounting the pin to the drive shaft of the scraped surface heat exchanger; and
means for retaining the scraped surface heat exchanger blade, comprising two generally hook-shaped arm portions extending from the mounting means and separated by a gap therebetween.
10. A pin according to claim 9 , wherein each arm portion has a first flat surface, a second flat surface generally perpendicular to the first flat surface, and a generally semi-circular concave surface extending from the second flat surface in opposed facing relationship to the first flat surface.
11. A pin according to claim 10 , wherein each concave surface is adapted to receive an attachment beam of the scraped surface heat exchanger blade.
12. A pin according to claim 10 , further comprising a saddle indentation disposed on the first flat portion between the two arms.
13. A pin according to claim 10 , wherein the two arms and the gap together form a width greater than a width of the base.
14. A blade for use with a scraped surface heat exchanger having a drive shaft with at least one pin, the scraped surface heat exchanger blade comprising:
a body portion; and
at least one means for attaching the scraped surface heat exchanger blade to the pin, including a pair of cutouts each having a respective attachment beam extending across the respective cutout portion.
15. A blade according to claim 14 , wherein the scraped surface heat exchanger blade comprises two attaching means each having the pair of cutouts.
16. A blade attaching system for use with a scraped surface heat exchanger having a drive shaft, comprising:
blade retaining means mounted to the drive shaft having a base and two generally hook shaped arms extending from the base and generated by a gap there between, wherein each hooked shape arm is adapted to receive and hold a respective attachment beam of a scraped surface heat exchanger blade; and
means for attaching the scraped surface heat exchanger blade to the blade retaining means including a pair of cutouts each having a respective attachment beam extending across the respective cutout portion.
17. A blade attaching method for use with a scraped surface heat exchanger having a drive shaft, comprising:
providing a scraped surface heat exchanger blade having at least one attachment region including a pair of cutouts each having a respective attachment beam extending across the respective cutout portion; and
inserting the scraped surface heat exchanger blade into a pin having a base and two generally hook shaped arms extending from the base and generated by a gap there between, wherein each hooked shaped arm is adapted to receive and hold the respective attachment beam of the scraped surface heat exchanger blade.
18. A method according to claim 17 , wherein the scraped surface heat exchanger blade has two attachment regions and two corresponding pins are provided on the drive shaft.