CN103006184B - Nozzle with orifices switchable at two ends - Google Patents

Abstract

The invention relates to a nozzle with orifices switchable at two ends. The nozzle comprises a shell (1), and is characterized in that the shell (1) is tubular, a slide ring (2) is arranged in the shell (1), an elastic tube (3) passes through a central hole of the slide ring (2) to be tensioned, two ends of the elastic tube are fixed to the ends of the shell (1) so that an inner hole of the elastic tube (3) to be gradually stretched and expanded outwards after departing from the side face of the slide ring (2), and a closed hollow cavity (7) is formed between the outer wall of the elastic tube (3) and the inner wall of the shell (1). The external circumference surface of the slide ring (2) is in movable fit with the inner wall of the shell (1) and divides the middle closed hollow cavity (7) into two portions, and through holes (5) communicated with the closed hollow cavity (7) on two sides of the slide ring (2) are arranged at two ends of the shell (1) respectively. The nozzle is capable of achieving suction and spraying function switching according to assumed tasks, and forward and reverse moving efficiency of a spray flow driving robot is improved remarkably.

Description

A kind of spout can two the nozzle of conversion

Technical field

The present invention relates to spraying is the device that the principle of reaction reaches propelling, is specifically related to the structure of liquid jet propeller suction inlet and jet.

Background technology

The robot that jet flow drives is usually used in various detections and the prune job in tubulose flow channel for liquids, wherein modal is vascular micro-robot, if publication number is that CN101961261A disclosed " a kind of jet-driven vascular micro-robot " and publication number are CN102125453A disclosed " a kind of vascular micro-robot of clearing up thrombosis ".Above-mentioned vascular micro-robot is at long and narrow blood in-pipe, if tune is oppositely mobile, possibility hardly, therefore needs the nozzle in propulsion system both to bear the effect of inhaling stream, bears again the effect of jet flow.From hydrodynamics, inhaling stream is two kinds of different operating modes with jet flow, and it is different inhaling the interaction between liquid and solid wall surface while flowing from jet flow.While inhaling stream, wish that the port of nozzle becomes large, be convenient to the gathering of liquid and then improve suction efficiency; When jet flow, wish that the port of nozzle diminishes, liquid is sprayed after supercharging gradually in runner.But, the runner described in above-mentioned two patent applications in the nozzle at vascular micro-robot two be all a kind of diameter reduce gradually from inside to outside tubaeform.Visible, can make blood after supercharging, spray gradually in runner although bear the nozzle of the effect of jet flow, owing to bearing, the suction efficiency of the nozzle of inhaling stream effect is low, and whole propulsion system efficiency still cannot improve.In like manner, if described nozzle is installed conversely, even if the diameter ecto-entad of its runner reduces gradually, but the nozzle of bearing sedimentation exhalation will inevitably lose boosting jet effect.

In sum, a kind of can be according to born effect, spout can two the nozzle of conversion become craving for of this area.

Summary of the invention

In view of there is above-mentioned deficiency in prior art, technical problem to be solved by this invention be to provide a kind of spout can two the nozzle of conversion, this nozzle can be realized the function conversion of inhaling stream and jet flow according to born task, significantly improves the mobile efficiency of the people's direct motion of jet flow driven machine and backward.

The technical scheme that the present invention addresses the above problem is:

A kind of spout can two the nozzle of conversion, this nozzle comprises housing, it is characterized in that, described housing is tubulose, in it, be provided with slip ring, an elastic tube passes through after the centre bore tensioning of slip ring, and the head of housing is fixed at two, make the endoporus of elastic tube leaving outwards stretching expansion gradually behind the side of described slip ring, between the outer wall of elastic tube and the inwall of housing, form a closed cavity; The periphery of described slip ring coordinates with the inwall of housing is moving, and closed cavity in the middle of described is divided into two; Two of described housing is respectively equipped with the through hole being communicated with the closed cavity of described slip ring both sides.

For making described slip ring can approach as best one can the end of housing, the both ends of described housing are embedded with respectively annular end cap, the centre bore edge of this end cap is provided with cannelure, by annular small end cover, the head of described elastic tube is pressed in the set cannelure in the centre bore edge of end cap; Described through hole passes through described annular end cap and is communicated with the closed cavity of described slip ring both sides by the end of described housing.

When through the centre bore of slip ring, produce gauffer for fear of elastic tube and increase the flow resistance of liquid, the external diameter of described elastic tube preferably equates with the aperture of the centre bore of described slip ring.

From the structure of nozzle of the present invention, when injecting fluid media (medium) (liquid or gas) in the closed cavity of slip ring one side, described slip ring just moves to other end by one of nozzle, and then realize two conversion of spout, to realize and inhale stream and flow-jetting function conversion according to born task.Therefore,, while adopting propulsion system that nozzle of the present invention forms for jet flow driven machine people, the jet flow driven machine people who obtains is that direct motion or backward all have higher mobile efficiency.

Accompanying drawing explanation

Fig. 1 and Fig. 2 are the structural representation of a specific embodiment of nozzle of the present invention, and wherein, Fig. 1 is front view (the A-A rotation of Fig. 2 is cutd open), and in figure, dotted line represents thatslip ring 2 is positioned at the state of the right head ofhousing 1, and Fig. 2 is left view.

Fig. 3 is the schematic diagram that uses the jet flow driven machine people of nozzle of the present invention, and in figure, dotted line represents pipeline.

Fig. 4 is the structural representation of another specific embodiment of nozzle of the present invention.

The specific embodiment

As depicted in figs. 1 and 2, whole nozzle is made up ofhousing 1,slip ring 2,elastic tube 3 andend cap 4, and wherein,housing 1 is one section of tubular structure, and both ends of the surface are provided with the cannelure that embedsend cap 4, and the side at two is provided with throughhole 5;Slip ring 2 is annular, and it is located inhousing 1, and periphery moves and coordinates with the inwall ofhousing 1;Elastic tube 3 is greater than 50% linear low density polyethylene by elastic extension and makes, and the equal diameters of the centre bore of external diameter andslip ring 2, it passes through after the centre bore tensioning ofslip ring 2 two outwards stretch expansion flange, then described flange is compressed and is fixed in the cannelure ofhousing 1 end face byscrew 6 byend cap 4; Centered by describedend cap 4, hole equals the annular ofhousing 1 internal diameter of tubulose.

As seen from Figure 1, between the outer wall ofelastic tube 3 and the inwall ofhousing 1, form a closedcavity 7, this closedcavity 7 is divided into two byslip ring 2, and the throughhole 5 ofhousing 1 side, two is communicated with the closedcavity 7 ofslip ring 2 both sides respectively.

Referring to Fig. 3 and in conjunction with Fig. 1, in the time that jet flow drivenmachine people 8 moves right, first bypropulsion control system 9, theslip ring 2 ofnozzle 10 that is positioned at the left head of jet flow drivenmachine people 8 is pushed into the left head ofhousing 1, it is the state shown in solid line in Fig. 1, slipring 2 in thenozzle 10 of the right head of jet flow drivenmachine people 8 is pushed into the right head ofhousing 1, i.e. state shown in dotted lines in Figure 1 simultaneously.Otherwise in the time that jet flow drivenmachine people 8 is moved to the left.From description above, thenozzle 10 at jet flow drivenmachine people 8 two, left and right can carry out jet flow and the conversion of inhaling stream function according to travel direction, significantly improves jet flow drivenmachine people 8 direct motion and the mobile efficiency of backward.

Referring to Fig. 4, for making describedslip ring 2 can approach as best one can the end ofhousing 1, this example has been done following improvement on Fig. 1 and basis embodiment illustrated in fig. 2: make the diameter ofend cap 4 centre bores be less than the diameter oftubular shell 1 endoporus, increase the annulus area ofend cap 4, be communicated with the closedcavity 7 ofslip ring 2 both sides by the end ofhousing 1 so that two throughhole 5 passes throughend cap 4; Correspondingly, process a cannelure in the edge of the centre bore ofend cap 4, adopt annularsmall end cover 11 with Fig. 1 and same mode embodiment illustrated in fig. 2, two ofelastic tube 3 is pressed in cannelure set onend cap 4.

Claims (3)

1. the nozzle that a spout can two conversion, this nozzle comprises housing (1), it is characterized in that, described housing (1) is tubulose, in it, be provided with slip ring (2), an elastic tube (3) passes through after the centre bore tensioning of slip ring (2), and the head of housing (1) is fixed at two, make the endoporus of elastic tube (3) outwards stretch and expand gradually behind the side of leaving described slip ring (2), between the outer wall of elastic tube (3) and the inwall of housing (1), form a closed cavity (7); The periphery of described slip ring (2) coordinates with the inwall of housing (1) is moving, and described closed cavity (7) is divided into two; Two of described housing (1) is respectively equipped with the through hole (5) being communicated with the closed cavity (7) of described slip ring (2) both sides.

A kind of spout according to claim 1 can two the nozzle of conversion, it is characterized in that, the both ends of described housing (1) are embedded with respectively annular end cap (4), the centre bore edge of this annular end cap (4) is provided with cannelure, by annular small end cover (11), the head of described elastic tube (3) is pressed in the set cannelure in the centre bore edge of annular end cap (4); Described through hole (5) passes through described annular end cap (4) and is communicated with the closed cavity (7) of described slip ring (2) both sides by the end of described housing (1).

A kind of spout according to claim 1 and 2 can two the nozzle of conversion, it is characterized in that the equal diameters of the external diameter of described elastic tube (3) and the centre bore of described slip ring (2).

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