Measuring needle with non return valve function
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01D-011/00
G01L-019/00
G01K-001/14
F16L-029/02
F16L-037/42
출원번호
US-0519354
(2011-01-25)
등록번호
US-8528430
(2013-09-10)
우선권정보
SE-1000215 (2010-03-08)
국제출원번호
PCT/SE2011/000011
(2011-01-25)
§371/§102 date
20120627
(20120627)
국제공개번호
WO2011/112133
(2011-09-15)
발명자
/ 주소
Jilderos, Daniel
출원인 / 주소
TA Hydronics AB
대리인 / 주소
Davis & Bujold, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
1
초록▼
A device for measuring pressure or temperature in a heating or a cooling system and where the device is a measuring needle complete (1) comprising a measuring needle housing (6) with one cavity (20) and a spring-loaded non return valve (8), where the non return valve, in a measuring position, has an
A device for measuring pressure or temperature in a heating or a cooling system and where the device is a measuring needle complete (1) comprising a measuring needle housing (6) with one cavity (20) and a spring-loaded non return valve (8), where the non return valve, in a measuring position, has an open communication with the probe (10) via the measuring needle housing and a hose nipple, via a hose, to a measuring instrument. This open communication is closed immediately as soon as the measuring is completed and the measuring needle (1) is removed from the measuring nipple. After measuring, due to this immediate closing, leakage of the enclosed fluid that exists in the complete measuring needle (1) and the measuring hose (5) is prevented.
대표청구항▼
1. A device included in a system for measuring of pressure and/or temperature of a fluid and where the device is a measuring needle complete (1), where measuring needle complete comprises a measuring needle housing (6) with a hose nipple (7) for connecting a measuring hose (5), and where, in the mea
1. A device included in a system for measuring of pressure and/or temperature of a fluid and where the device is a measuring needle complete (1), where measuring needle complete comprises a measuring needle housing (6) with a hose nipple (7) for connecting a measuring hose (5), and where, in the measuring needle housing (6), a non return valve (8), a reset spring (13), a probe (10) and a lock washer (15) is provided, wherein the non return valve (8) is displaced into a cavity (20) of the measuring needle housing (6) in connection with that the measuring needle complete is mounted on a measuring nipple (3), whereby a communication is opened from the fluid via a first opening (11) in the probe (10), through the probe and further via a second opening (12) in the probe to the non return valve (8) and its center part (21) where the center part is provided with a hole (26) outwards to the cavity (20) and further via a cavity (25) to the hose nipple (7) and finally further via the measuring hose (5) up to a measuring instrument (4), and the communication is opened by that the non return valve (8) and its upper part (18) is moved as far backwards in the cavity (20) until the center part (21) in the non return valve has reached a position where an open communication with the cavity (25) is provided. 2. The device according to claim 1, wherein when the measuring needle complete (1) is removed from the measuring nipple (3), the reset spring (13) will press the non return valve (8) back to the initial position of the non return valve, whereby the communication from the measuring hose (5) and the cavity (25) is closed since gasket's (9) mounted on the upper part (18) of the non return valve (8) will be positioned on each side of the cavity (25) and its outlet in the cavity (20), and accordingly there is provided a tightness from the cavity (25) upwards to the reset spring (13) as well as downwards to the center part (21) of the non return valve (8) and accordingly it is also tight outwards to the opening (11) of the probe (10). 3. The device according to claim 1, wherein when the measuring needle complete (1) is mounted on the measuring nipple (3), a flush through of fluid is allowed through the complete measuring needle (1) in a direction away from the hose nipple (7) to the opening (11) by the non return valve (8) in that moment is positioned in its rear position in the cavity (20) and by a communication between the fluid and the measuring instrument (4) is open, and this occurs in one of the, by normally measuring procedure to the measuring nipples (3) in pairs connected, complete measuring needles (1) at the same time as the fluid in the other measuring needle flows in the opposite direction. 4. The device according to claim 1, wherein measuring needle housing (6) is provided with the cavity (20) which by dimensions is coordinated with the non return valve (8) and its outer gaskets (9), furthermore the cavity is provided with a recess (14) in its upper part to the surrounding, and a stop lug (32) in the upper part of the cavity where the stop lug provides for the upper limit position/working position of the non return valve (8). 5. The device according to claim 1, wherein the cavity (20) in the measuring needle housing (6) is provided with the recess (14) and the recess (14) eliminates the risk for compressed air in the space above the non return valve (8) when the non return valve is moved upwards to its upper position, against the stop lug (32). 6. The device according to claim 1, wherein the upper part (18) of the non return valve (8) and a lower part (17) are connected with the center part (21) with particularly a smaller dimension compared with the both parts (17) and (18) respective, where the center part (21) is provided with a number of holes (26) perpendicular to the longitudinal axis of the non return valve (8), where the parts (17) and (18) respective are provided with the gaskets (9) on the respective peripheral surface and an interior gasket element, a gasket (22), where the outer gaskets (9) seals against the cavity (20) and the interior gaskets (22) seals against the probe (10). 7. The device according to claim 1, wherein the lock washer (15) is mounted on a lower part (31) of the measuring needle housing (6) in a groove (28) and where the lock washer is provided with an opening (30) with varying cross section, and the lock washer cooperates with a reset spring (16) where the reset spring is constricted between the lock washer (15) and a recess (29) in the lower part (31) of the measuring needle housing (6) and where the opening (30) is selected in a way that the lock washer (15) engage the lower part (27) of the non return valve (8) and as a result the non return valve (8) is fixed in its position for the coming measuring. 8. The device according to claim 1, wherein the lock wash (15) also fixes the complete measuring needle (1) on the measuring nipple (3) by that, at the connection procedure, the complete measuring needle (1) is pressed against the measuring nipple (3), whereby the measuring nipple influences the non return valve (8) which leaves its working position and moves in direction against the reset spring (13), when the measuring nipple is pressed into the lower part (31) of the measuring needle housing, and then the measuring nipple, which normally has a smaller diameter than the lower cylindrical part (27) of the non return valve, ends up against the opening (30) of the lock washer, whereby the reset spring (16) presses the lock washer (15), which consequently locks the complete measuring needle (1) on the measuring nipple (3). 9. The device according to claim 1, wherein the upper end position of the non return valve (8) in the upper part of the cavity (20) is so adapted that the communication from the fluid to the measuring instrument (4) is open at that moment, but the lower end position of the non return valve (8) is the same as the initial position, before mounting on the measuring nipple (3) in which the non return valve then seals against the probe (10), and accordingly also against the first opening (11). 10. The device according to claim 1, wherein the upper end position of the non return valve (8) is determined of an, relative the upper end cover of the cavity (20), interior stop lug (32) and the lower end position of the non return valve is determined of the lock washer (15). 11. The device according to claim 1, wherein the non return valve (13) never is influenced by the fluid and this by that the exterior gasket (9) on the upper part (18) of the non return valve (8) always seals against the cavity (20).
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