A kind of Hall-type flowmeter
Technical field
The utility model belongs to hall sensor technical field, specifically discloses a kind of Hall-type flowmeter.
Background technology
Hall flow meter is a kind of flowmeter based on being positioned at sensing, and principle of work is that impeller rotates under fluid forces, drives screw rod to rotate, and magnetic system is produced and moves up and down, detect displacement and obtain flow velocity and flow with hall device.Also more about the technical literature of Hall flow meter in prior art, such as application number be 200620135941.7 utility model patent disclose a kind of Hall flow sensor, connect the wheel hub be connected with impeller with shaft coupling in housing, between coupling spindle and wheel hub, bearing is set, wheel hub is provided with one block of permanent magnet, on housing, the same side of permanent magnet, same radical length position arrange Hall switch.
Application number is that the utility model patent of 200820120097.X discloses a kind of turbo flow meter with Hall effect, comprise flowmeter shell, magnet, magnet stator, turbine rotor, divider, filter disc net, flow joint, restrictor ring, screen pack, Hall chip and Hall chip shell, turbine rotor is located in flowmeter shell, magnet is enclosed within turbine rotor top, fixed by the magnet stator above magnet, divider is connected with in turn below turbine rotor, filter disc net, flow joint, a restrictor ring is provided with in flow joint, flow joint overcoat has screen pack, the outer side, upper end of flowmeter shell is provided with Hall chip shell, Hall chip shell is built with Hall chip, Hall chip and magnet are on same level position, on divider, planar central is provided with a thimble, turbine rotor lower plane center is provided with the shrinkage pool matched with thimble, magnetic blow out centre is provided with spacing hole, and spacing hole is circumferentially with the circular hole of projection, and turbine rotor upper end is provided with the limit buckle matched with projection.
Application number be 200920135673.2 utility model patent disclose a kind of hall rotameter, comprise the outer cover body being provided with inlet and liquid outlet, restriction is provided with between inlet and liquid outlet, be located at going out in sap cavity between restriction and liquid outlet and be provided with float, float comprises the head towards inlet and the afterbody towards liquid outlet, spring is provided with in float afterbody in outer cover body, the other end of spring is provided with spring stop piece, magnet is provided with in float, radial outside in restriction in housing main body is provided with the circuit board be connected with Hall parts, Hall parts are embedded in the outer cover body of the magnet in contiguous float, liquid stream promotes float when restriction, and the displacement signal of Hall parts induction float internal magnet, displacement signal exports outside to after the data processing unit process being located at circuit board.
Application number be 200920296963.5 utility model patent disclose a kind of helical-line Hall flow meter with suspended rotor, form primarily of rotor, stator, permanent magnet, Hall element, signal transacting and display device, rotor is a tubular body inner cylinder face being shaped with helix, and permanent magnet is arranged on the wall of rotor; Stator is provided with Hall element; Can using one section of original pipe body as stator.
Application number be 20142043372.1 utility model patent disclose a kind of Hall effect large diameter pipeline flowmeter, comprise large-diameter pipe and small-bore arm; The two ends of described small-bore arm are arranged in large-diameter pipe; Hall flow sensor is provided with in described small-bore arm; Described small-bore arm comprises horizontal inlet end, ascent stage, horizontal segment, descending branch and Horizontal Exit end; Described horizontal inlet end and Horizontal Exit end are arranged in described large-diameter pipe, and the described ascent stage is vertical with large-diameter pipe with descending branch and part passes large-diameter pipe, and described horizontal segment connection described ascent stage and descending branch pass the port of large-diameter pipe part; Described Hall flow sensor is arranged in horizontal segment.
As the Hall flow meter of the prior art told about above, inlet and the liquid outlet of fluid are all for parallel state, due to fluid to the impulsive force of runner all in the side of runner, the resistance that runner produces is larger, and runner tooth surface abrasion is comparatively large and the factor such as bridle joint malocclusion causes error in dipping large, metering sensitivity and precision low.
Utility model content
The utility model is in order to the metering sensitivity that solves existing hall sensor and exist and the low problem of precision, and a kind of Hall-type flowmeter is provided, can alter resistance that wheel rotation is produced, thus reduce impeller tooth surface abrasion, improve the stability of bridle joint occlusion, thus improve metering sensitivity and precision.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of Hall-type flowmeter, comprise the outer cover body being provided with inlet and liquid outlet, impeller is provided with in described outer cover body, it is characterized in that, described outer cover body is equipped with Hall element, described inlet is communicated with feed pathway, described liquid outlet is communicated with liquid outlet channel, the center line of described feed pathway is mutually vertical with the center line of liquid outlet channel, and the center line of the center line of feed pathway and liquid outlet channel is not in same level.
The center line of described feed pathway is mutually vertical with the center line of the rotating shaft of impeller; The center line of the center line of described liquid outlet channel and the rotating shaft of impeller is parallel to each other.
The cylindrical that the outer wall of described feed pathway and impeller are formed is tangent; Distance between the inwall of described feed pathway and outer wall is less than the radius of impeller.
Described feed pathway is communicated with input duct, and described liquid outlet channel is communicated with fluid pipeline.
Described Hall element comprises the Hall element of permanent magnet and energy induced field, and described Hall element is fixed on the outside surface of outer cover body, and described permanent magnet is fixed on impeller.
Described impeller is equipped with the locating piece for limiting impeller play in the axial direction.
Compared with prior art, the utility model has following beneficial effect: Hall-type flowmeter of the present utility model, comprise the outer cover body being provided with inlet and liquid outlet, impeller is provided with in described outer cover body, described outer cover body is equipped with Hall element, described inlet is communicated with feed pathway, described liquid outlet is communicated with liquid outlet channel, the center line of described feed pathway is mutually vertical with the center line of liquid outlet channel, and the center line of the center line of feed pathway and liquid outlet channel is not in same level.The utility model changes the existing feed pathway of Hall-type flowmeter and the arrangement of liquid outlet channel, and fluid enters impeller from feed pathway and rotates, and then gets rid of from liquid outlet channel; Compared to existing Hall-type flowmeter, the utility model reduces the resistance that fluid produces wheel rotation, thus reduces impeller tooth surface abrasion, improves the stability of bridle joint occlusion, thus improves metering sensitivity and precision.
Accompanying drawing explanation
Fig. 1 is front view structural representation of the present utility model;
Fig. 2 is upward view structural representation of the present utility model, does not now connect input duct;
Mark in figure: 1, outer cover body, 2, impeller, 3, feed pathway, 4, input duct, 5, fluid pipeline, 6, liquid outlet, 7, liquid outlet channel, 8, Hall element.
Embodiment
Below in conjunction with embodiment, the utility model will be further described, and described embodiment is only the utility model part embodiment, is not whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art, not making other embodiments used obtained under creative work prerequisite, belongs to protection domain of the present utility model.
By reference to the accompanying drawings, Hall-type flowmeter of the present utility model, comprise the outer cover body 1 being provided with inlet and liquid outlet 6, impeller 2 is provided with in described outer cover body 1, described outer cover body 1 is equipped with Hall element 8, and described inlet is communicated with feed pathway 3, and described liquid outlet 6 is communicated with liquid outlet channel 7, the center line of described feed pathway 3 is mutually vertical with the center line of liquid outlet channel 7, and the center line of the center line of feed pathway 3 and liquid outlet channel 7 is not in same level.The utility model changes the existing feed pathway of Hall-type flowmeter and the arrangement of liquid outlet channel, and fluid enters impeller from feed pathway and rotates, and then gets rid of from liquid outlet channel; Compared to existing Hall-type flowmeter, the utility model reduces the resistance that fluid produces wheel rotation, thus reduces impeller tooth surface abrasion, improves the stability of bridle joint occlusion, thus improves metering sensitivity and precision.
Mostly on the same line, thus fluid is in the process of flowing for existing hall sensor feed pathway and liquid outlet channel, and the time continued the impulsive force of impeller is long, and impulsive force is only for a certain region of impeller.And the utility model fluid impeller 2 after feed pathway 3 enters is rotated, impeller 2 is got rid of from liquid outlet 6 through liquid outlet channel 7 after rotating immediately, and fluid is in the process of discharging, discharge between adjacent blade, namely the rotating shaft of the discharge direction of fluid and impeller in the same direction, makes to produce impulsive force to impeller in the process of discharging.Therefore, the utility model can the resistance that produces wheel rotation of alter.
The center line of feed pathway 3 of the present utility model is mutually vertical with the center line of the rotating shaft of impeller 2; The center line of the center line of described liquid outlet channel 7 and the rotating shaft of impeller 2 is parallel to each other.
As a kind of preferred mode of the utility model, the cylindrical that the outer wall of feed pathway 3 and impeller 2 are formed is tangent; Distance between the inwall of described feed pathway 3 and outer wall is less than the radius of impeller 2.
For the ease of connecting, feed pathway 3 of the present utility model is communicated with input duct 4, and described liquid outlet channel 7 is communicated with fluid pipeline 5.
Hall element of the present utility model comprises the Hall element of permanent magnet and energy induced field, described Hall element is fixed on the outside surface of outer cover body, described permanent magnet is fixed on impeller, in the process used, fluid driven wheel rotation, thus drive permanent magnet rotating, permanent magnet often rotates a circle, then Hall element induction once produces pulsatile once signal, thus realizes metering.
As a kind of preferred mode of the utility model, described impeller 2 is equipped with the locating piece for limiting impeller 2 play in the axial direction.
Embodiment one: the Hall-type flowmeter of the present embodiment, comprise the outer cover body being provided with inlet and liquid outlet, impeller is provided with in described outer cover body, described outer cover body is equipped with Hall element, described inlet is communicated with feed pathway, described liquid outlet is communicated with liquid outlet channel, and the center line of described feed pathway is mutually vertical with the center line of liquid outlet channel, and the center line of the center line of feed pathway and liquid outlet channel is not in same level.
Embodiment two: the Hall-type flowmeter of the present embodiment, comprise the outer cover body being provided with inlet and liquid outlet, impeller is provided with in described outer cover body, described outer cover body is equipped with Hall element, described inlet is communicated with feed pathway, described liquid outlet is communicated with liquid outlet channel, and the center line of described feed pathway is mutually vertical with the center line of liquid outlet channel, and the center line of the center line of feed pathway and liquid outlet channel is not in same level; The center line of described feed pathway is mutually vertical with the center line of the rotating shaft of impeller; The center line of the center line of described liquid outlet channel and the rotating shaft of impeller is parallel to each other.
Embodiment three: the Hall-type flowmeter of the present embodiment, comprise the outer cover body being provided with inlet and liquid outlet, impeller is provided with in described outer cover body, described outer cover body is equipped with Hall element, described inlet is communicated with feed pathway, described liquid outlet is communicated with liquid outlet channel, and the center line of described feed pathway is mutually vertical with the center line of liquid outlet channel, and the center line of the center line of feed pathway and liquid outlet channel is not in same level; The center line of described feed pathway is mutually vertical with the center line of the rotating shaft of impeller; The center line of the center line of described liquid outlet channel and the rotating shaft of impeller is parallel to each other; The cylindrical that the outer wall of described feed pathway and impeller are formed is tangent; Distance between the inwall of described feed pathway and outer wall is less than the radius of impeller.
Embodiment four: on the basis of above-mentioned any embodiment, described feed pathway is communicated with input duct, and described liquid outlet channel is communicated with fluid pipeline.
Embodiment five: on the basis of above-mentioned any embodiment, described Hall element comprises the Hall element of permanent magnet and energy induced field, and described Hall element is fixed on the outside surface of outer cover body, and described permanent magnet is fixed on impeller.
Embodiment six: on the basis of above-mentioned any embodiment, described impeller is equipped with the locating piece for limiting impeller play in the axial direction.