Patent SG-11201805227S-A (SG)
Title: Self-regulating open circuit pump unit
Inventor: THOMSEN PETER
IPC: G05D13/62
Filed: 2016-11-25
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property C.--.` 1 MI 11111 0 11101 HOE 010 1111 1 0 013 0101110111011111011 11110 MAMIE Organization International Bureau (10) International Publication Number (43) International Publication Date .../- WO 2017/214701 Al 21 December 2017 (21.12.2017) WIP0 I PCT (51) International Patent Classification: KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, G05D 13/62 (2006.01) F04D 15/00 (2006.01) MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, A62C 37/00 (2006.01) PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, (21) International Application Number: SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, PCT/CA2016/051392 TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (22) International Filing Date: (84) Designated States (unless otherwise indicated, for every 25 November 2016 (25.11.2016) kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, (25) Filing Language: English UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, (26) Publication Language: English TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, (30) Priority Data: MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 62/350,038 14 June 2016 (14.06.2016) US TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). (71) Applicant: S. A. ARMSTRONG LIMITED [CA/CA]; 23 Bertrand Avenue, Scarborough, Ontario M1L 2P3 (CA). Published: (72) Inventor: THOMSEN, Peter; 23 Bertrand Avenue, Scar- — with international search report (Art. 21(3)) borough, Ontario M1L 2P3 (CA). — with amended claims (Art. 19(1)) (74) Agent: RIDOUT & MAYBEE LLP; 250 University Av- enue, 5th Floor, Toronto, Ontario M5H 3E5 (CA). = (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, = _ AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, _ CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, — HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KW, (54) Title: SELF-REGULATING OPEN CIRCUIT PUMP UNIT = = 400 (57) : A self-regulating fire pump unit which can be con- = \ 426 trolled to operate under required conditions for sourcing a fire pro- 410 tection system such as sprinklers. The fire pump unit can be oper- 1111 11111111 II 111111 11111 I 1111 11111 II II I I T. g i 2; _ ,-,J6 Shutoff 1 Hith ated in accordance with a control curve based on detected pressure and flow. The control curve can include: a) a first setpoint of rated I total value of the system load for the and the flow, b) a pressure 1 420 L — second setpoint of a minimum partial percentage of the rated total ..— 7 — — k — `Rat e __.,422 value of the pressure at an over-percentage of the rated total value — 402 — — — Rated flow, of the c) a path which maintains the rated total value of the 412 pressure for all values of the flow up to the first setpoint, d) a path between the first setpoint and the second setpoint, e) a path from i 1 i ____..--424 the second setpoint which limits values of the pressure for values of the flow greater than the second setpoint. t_ r ____--414 50 100 150 200 PERCENT OF RATED CAPACITY-------,___ 404 P S I 408 \ 2 1 00 5 i 11 0 © ; no IN 50 --- a 7r 0 0 50 100 150 200 Il N 416 PERCENT OF RATED CAPACITY,....._ 404 ---.... IN Il 0 FIGURE 4 ei 0