NZ746674B2 - Metering mechanism for a pump, methods for locking and unlocking such a mechanism - Google Patents
Metering mechanism for a pump, methods for locking and unlocking such a mechanism Download PDFInfo
- Publication number
- NZ746674B2 NZ746674B2 NZ746674A NZ74667417A NZ746674B2 NZ 746674 B2 NZ746674 B2 NZ 746674B2 NZ 746674 A NZ746674 A NZ 746674A NZ 74667417 A NZ74667417 A NZ 74667417A NZ 746674 B2 NZ746674 B2 NZ 746674B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- metering mechanism
- ring
- adjustment nut
- nut
- metering
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 title claims abstract 33
- 238000000034 method Methods 0.000 title claims abstract 4
- 230000033001 locomotion Effects 0.000 claims abstract 4
- 230000000903 blocking effect Effects 0.000 claims 5
- 230000003213 activating effect Effects 0.000 claims 2
- 238000013459 approach Methods 0.000 claims 1
- 210000000078 claw Anatomy 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
- F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
- F04B9/107—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2003—Screw mechanisms with arrangements for taking up backlash
- F16H25/2006—Screw mechanisms with arrangements for taking up backlash with more than one nut or with nuts consisting of more than one bearing part
Abstract
The invention relates to a metering mechanism (7) comprising a body (70) mounted in a sleeve (77) covering it by the top and in an adjustment nut (71) covering it by the bottom. The adjustment nut engages by screw connection with the sleeve, causing rotation of the adjustment nut with respect to the body of the metering mechanism. The body is extended by a valve seat that can be closed by a valve (not shown) and that is able to receive a plunger (not shown) of which the reciprocating motion permits intake at the valve. The travel of the plunger depends on the screw position between the adjustment nut and the sleeve. The metering mechanism further comprises a means (M) of a ring (1) housed in a locking nut (2) mounted to rotate around the body (70). The ring is mounted to translate only around and along the body (70) between a first position of abutment at the bottom of the locking nut and a second position of abutment against the adjustment nut to lock the rotation between the adjustment nut (71) and the body of the metering mechanism (70), preventing the adjustment nut being screwed or unscrewed on the sleeve. The proposed invention provides a device and method that prevents the accidental separation between the adjustment of the metering mechanisms during mounting and dismantling of hydraulic machinery.
Claims (13)
1. A metering mechanism (7) comprising a body (70) mounted to translate in a sleeve (77) which is itself mounted in an adjustment nut (71), said adjustment nut being capable 5 of cooperating by screwing with said sleeve, said screwing then causing a rotation of the adjustment nut relative to the body of the metering mechanism, said body being extended by a valve seat (75) that can be closed by a valve (76) and that is capable of accommo- dating a plunger (8), the reciprocating movement of which allows at least a suction at the valve (76), the travel of the plunger being a function of the position of screwing between 10 the adjustment nut and the sleeve, characterized in that the metering mechanism also comprises means (M) for activating the blocking of the rotation between the adjustment nut (71) and the body of the metering mechanism (70) so as to prohibit the screwing and the unscrewing between the adjustment nut and the sleeve, said means comprising a ring (1) housed in a locking nut (2) mounted to rotate around the body (70), said ring cooper- 15 ating by screwing with said locking nut, said ring being mounted to translate only around and along the body of the metering mechanism between a first position of abutment at the bottom of the locking nut and a second position of abutment against the adjustment nut involving the rotational blocking of the adjustment nut rendered secured by complemen- tarity of form with the ring.
2. The metering mechanism as claimed in claim 1, characterized in that the ring is mounted to translate along the body of the metering mechanism by means of a slide link produced by means of at least one snug (10) formed on an inner circumferential surface of the ring, said snug being capable of sliding in a groove (79) formed on an outer cir- 25 cumferential surface of the body.
3. The metering mechanism as claimed in claim 1, characterized in that the ring is mounted to translate along the body of the metering mechanism by means of a slide link produced by means of at least one rib formed on an outer circumferential surface of the 30 body, said rib being capable of sliding in a groove formed in an inner circumferential surface of the ring.
4. The metering mechanism as claimed in any one of the preceding claims, charac- terized in that the ring cooperates by screwing with the locking nut by means of a block formed on an outer circumferential surface of the ring, said block being capable of sliding along a helix formed on an inner circumferential surface of the locking nut.
5. The metering mechanism as claimed in any one of claims 1 to 3, characterized in 5 that the ring cooperates by screwing with the locking nut by means of a block (21) formed on an inner circumferential surface of the locking nut, said block being capable of sliding along a helix (11) formed on an outer circumferential surface of the ring.
6. The metering mechanism as claimed in any one of the preceding claims, charac- 10 terized in that the rotational blocking by complementarity of form of the ring against the adjustment nut is performed by means of a claw coupling formed between a face (12) of the ring and a shoulder (78) of the adjustment nut, facing one another.
7. The metering mechanism as claimed in any one of the preceding claims, charac- 15 terized in that the means (M) for activating the blocking of the rotation between the ad- justment nut and the body of the metering mechanism further comprise a circlip (3) ca- pable of translationally blocking the locking nut relative to the body of the metering mechanism. 20
8. The metering mechanism as claimed in any one of the preceding claims, charac- terized in that the mechanism comprises metering display means formed on an outer cir- cumferential surface of the sleeve, these means implementing a graduated indicator (74) printed or etched on the outer circumferential surface of the sleeve and a viewing ring (72) making it possible to aim the graduation of the indicator.
9. The metering mechanism as claimed in any one of the preceding claims, charac- terized in that the mechanism comprises sealing means (6) interposed between the body and the sleeve. 30
10. The metering mechanism as claimed in any one of the preceding claims, charac- terized in that the sleeve comprises a shoulder (770) capable of retaining a fixing nut (5) on a hydraulic machine.
11. A proportional metering pump comprising a hydraulic machine (4) provided with an inlet (40) and an outlet (41), a metering mechanism (7) communicating at one of its ends with an access nozzle to a mixing chamber internal to the pump and, at the other of its ends, with a tank of product to be metered, the hydraulic machine extending along a longitudinal axis (9) and enclosing a member designed to perform a reciprocating move- 5 ment, the supplying of the pump with liquid at the inlet triggering the reciprocating move- ment of the member, said movement alternately provoking a suction through the metering mechanism into the mixing chamber with opening of a suction valve (76) when the mem- ber moves away from the metering mechanism then an expulsion at the outlet (41) of the pump with closure of the suction valve when the member approaches the metering mech- 10 anism, characterized in that the metering mechanism (7) conforms to any one of claims 1 to 10.
12. A method for locking a metering mechanism as claimed in any one of claims 1 to 10, characterized in that: 15 - the adjustment nut (71) is turned to select the desired metered quantity, - the means (M) are activated by turning the locking nut (2) in order to bring the ring (1) into its second position of abutment against the adjustment nut in order to rotationally block the adjustment nut (71) by complementarity of form. 20
13. A method for unlocking a metering mechanism as claimed in any one of claims 1 to 10, characterized in that the means (M) are deactivated by turning the locking nut (2) in order to bring the ring (1) into its first position of abutment disengaged from the ad- justment nut, in order to render the adjustment nut (71) free to rotate with respect to the ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1653061A FR3049993B1 (en) | 2016-04-07 | 2016-04-07 | MECHANISM FOR DOSING A PUMP, METHODS OF LOCKING AND UNLOCKING SUCH A MECHANISM |
| PCT/EP2017/058254 WO2017174722A1 (en) | 2016-04-07 | 2017-04-06 | Metering mechanism for a pump, methods for locking and unlocking such a mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ746674A NZ746674A (en) | 2024-02-23 |
| NZ746674B2 true NZ746674B2 (en) | 2024-05-24 |
Family
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