CN201589745U - Proportion weighing device - Google Patents
Proportion weighing device Download PDFInfo
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- CN201589745U CN201589745U CN2009202553808U CN200920255380U CN201589745U CN 201589745 U CN201589745 U CN 201589745U CN 2009202553808 U CN2009202553808 U CN 2009202553808U CN 200920255380 U CN200920255380 U CN 200920255380U CN 201589745 U CN201589745 U CN 201589745U
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- gear
- steelyard
- proportion
- arm beam
- annular rack
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Abstract
The utility model relates to a proportion weighing device, which comprises a weighing lever. The proportion weighing device is characterized in that a small water cup for weighing solid proportion is suspended to a suspension groove on the right side of a fulcrum of the weighing lever, an article suspension net bag is suspended on the weighing lever and between the fulcrum and a balance weight, and the small water cup for weighing solid proportion sides side to side on the right side of the weighing lever by turning an adjusting knob. Pluralities of circles of potentiometers are fixed at the center of a vertical bisection plane of the fulcrum and on the weighing lever, and a numeric direct current meter is fixed on a support seat. A central tap and a fixing terminal lead of the plurality of circles of potentiometers, a battery group and the numeric direct current meter form a circuit loop. The proportion weighing device can precisely weigh proportion of water-insoluble solid with a proportion larger than 1g/cm3 and not too small volume.
Description
Technical field
The utility model relates to a kind ofly can weigh proportion greater than 1g/cm more accurately
3Reach the proportion meausring apparatus of the not too little water-insoluble solid of volume.
Background technology
At present, from the known patent No. be the application specification of linear scale hydrostatic balance of ZL 200820160859.9 the principle narration as can be known, there is the not high enough shortcoming of weighing precision in the device of the proportion of this weighing solid, needs its structure is further improved for this reason.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of and can weigh proportion more accurately greater than 1g/cm
3Reach the proportion meausring apparatus of the proportion of the not too little water-insoluble solid of volume.
The technical scheme that provides according to the utility model, a kind of proportion meausring apparatus comprises the arm beam of steelyard, supporting seat, two spacing rings that raise up about the top of described supporting seat is provided with, the arm beam of steelyard passes the endoporus of two spacing rings, and fulcrum is fixed on the arm beam of steelyard between two spacing rings; Supporting seat top between two spacing rings is provided with the V-knife mouth, and the arm beam of steelyard is supported on the V-knife mouth by fulcrum; The center pit of adjusting knob and the center pit of transition gear together are fixed on the central shaft on the vertical bisector plane of the fulcrum that passes on the arm beam of steelyard; Balanced weight is installed on the adjusting screw(rod) in the left side of fulcrum on the arm beam of steelyard, between balanced weight and the adjusting screw(rod) by being threaded; The levelness direction board is fixed on the front of supporting seat; Be carved with the number of degrees on the described levelness direction board; Arm beam of steelyard levelness pointer is fixed on the arm beam of steelyard; The front on fulcrum right side on the arm beam of steelyard is carved or be fixed on to the proportion rule; The central shaft two ends of transition gear are fixed on former and later two faces of the arm beam of steelyard; The central shaft two ends of driving gear are fixed on former and later two faces of the arm beam of steelyard; The central shaft two ends of follower gear are fixed on former and later two faces of the arm beam of steelyard; Initiatively annular rack is enclosed within on the gear wheel of driving gear and transition gear; Be fixed with a suspension groove on the no flank of tooth of the upper gear rack of described active annular rack; Driven annular rack tube is on the pinion wheel of follower gear and transition gear; Feature is: the little water tumbler that hangs weighing solid proportion on the described arm beam of steelyard on the suspension groove on fulcrum right side, object hangs mesh bag and is suspended on the arm beam of steelyard between fulcrum and the balanced weight, makes the little water tumbler of weighing solid proportion can be in the right side of arm beam of steelyard move left and right by the turn adjusting knob.
Be positioned on the described arm beam of steelyard by multiturn potentiometer of center fixed on the vertical bisector plane of fulcrum, the spigot shaft coaxle of the turning axle of multiturn potentiometer and adjusting knob or transition gear; Described digital DC table is fixed on the supporting seat; The center tap of described multiturn potentiometer and stiff end lead-in wire and electric battery and digital DC table built-up circuit loop.
Described suspension groove is made of plastics or stainless steel; Described suspension groove is made of the opposite draw-in groove of both direction up and down, small adjustment can be done (in case adjust in its position on the active annular rack, it is motionless that its position should keep), be with primary screw on the draw-in groove of bottom, what make that suspension groove can be firm is fixed on initiatively on the annular rack, and the draw-in groove on top promptly is used to hang little water tumbler or places sliding weight; Described suspension groove is done moving to the left or to the right at the mobile lower edge of active annular rack chute, does moving to the left or to the right thereby drive the sliding weight that hangs the little water tumbler on it or be placed on it.
Described digital DC table is the digital DC ammeter that range ability can be provided with; Described digital DC table is used to show by the rate of specific gravity of weighing solid and shows by the gravimetric value of weighing object; Described digital DC table is fixed on the supporting seat.
The turning axle of described multiturn potentiometer is fixed on the arm beam of steelyard fulcrum over against the centre of position; The turning axle of described multiturn potentiometer is as the central shaft of transition gear, and the rotation of transition gear drives the rotation of the turning axle of multiturn potentiometer; The center tap of described multiturn potentiometer and stiff end lead-in wire and direct supply and digital DC table built-up circuit loop.The zero point of described multiturn potentiometer is corresponding with suspension groove fulcrum 3 positions on the arm beam of steelyard.Described multiturn potentiometer adopts the copper-manganese potentiometer of better heat stability;
Described transition gear adopts plastics or stainless steel material to make; Density on the described transition gear evenly distributes; Described transition gear constitutes an integral body by one little one coaxial big two gears; The ratio of the number of teeth of two gears of size of described transition gear equals their diameter ratio, and its ratio is generally more than or equal to 4; Tooth on the described transition gear evenly distributes on its circumference; The tooth pitch of described transition gear is less than 1mm; On two end faces of described transition gear rib is arranged all.
Described driving gear adopts plastics or stainless steel material to make; Density on the described driving gear evenly distributes; The diameter of described driving gear and the number of teeth equate fully with the gear wheel of transition gear; Tooth on the described driving gear evenly distributes on its circumference; The thickness of described driving gear equates with the thickness of the gear wheel of transition gear; On two end faces of described driving gear rib is arranged.
Described follower gear adopts plastics or stainless steel material to make; Density on the described follower gear evenly distributes; The diameter of described follower gear and the number of teeth equate with the pinion wheel of transition gear; Tooth on the described follower gear evenly distributes on its circumference; The thickness of described follower gear equates with the thickness of the pinion wheel of transition gear; On two end faces of institute's follower gear rib is arranged.
Described active annular rack is made of plastics or stainless sheet steel; Density on the described active annular rack evenly distributes; Tooth on the described active annular rack evenly distributes; The tooth pitch of described active annular rack equates with the tooth pitch of the gear wheel of driving gear or transition gear; The width of described active annular rack equates with the width of the flank of tooth of the gear wheel of driving gear or transition gear.
Described driven annular rack is made of plastics or stainless sheet steel; Density on the described driven annular rack evenly distributes; Tooth on the described driven annular rack evenly distributes; The tooth pitch of described driven annular rack equates with the tooth pitch of the pinion wheel of follower gear or transition gear; The width of described driven annular rack equates with the width of the flank of tooth of follower gear or transition gear pinion wheel.
The diameter of the gear wheel of described transition gear is R
1, the number of teeth is N
1, the diameter of its pinion wheel is R
2, the number of teeth is N
2, then be fixed on the weight G of the servo-actuated counterweight on the driven annular rack
2Be fixed on the suspension groove on the annular rack initiatively and the weight sum G of little water tumbler
1Between have relation: R
1: R
2=N
1: N
2=G
2: G
1
The utlity model has following advantage:
The utility model can weigh proportion more accurately greater than 1g/cm
3Reach the proportion of the not too little water-insoluble solid of volume.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the arm beam of steelyard of the utility model embodiment 1 and the vertical view of part correlation annex thereof.
Fig. 3 is the arm beam of steelyard of the utility model embodiment 1 and the front view of part correlation annex thereof.
Fig. 4 is the structure principle chart that the utility model embodiment 1 is used for the proportion of weighing solid.
Fig. 5 is the structural representation of the utility model embodiment 2.
Fig. 6 is the arm beam of steelyard of the utility model embodiment 2 and the vertical view of part correlation annex thereof.
Fig. 7 is the arm beam of steelyard of the utility model embodiment 2 and the front view of part correlation annex thereof.
Fig. 8 is the structure principle chart that the utility model embodiment 2 is used for the proportion of weighing solid.
Fig. 9 be digital DC table among the utility model embodiment 2, multiturn potentiometer, and electric battery between the electrical schematic diagram that connects.
Embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
Embodiment 1:
As Fig. 1～shown in Figure 4, comprise the arm beam of steelyard 1, adjusting knob 2, fulcrum 3, " V " type edge of a knife 4, supporting seat 5, spacing ring 6, balanced weight 7, adjusting screw(rod) 8, levelness direction board 9, arm beam of steelyard levelness pointer 10, proportion rule 11, suspension groove 13, chute 17, transition gear 18, driving gear 19, follower gear 20, initiatively annular rack 21, driven annular rack 22, servo-actuated counterweight 23, object hang mesh bag 24, little water tumbler 25, big water tumbler 27 etc.
The utility model arm beam of steelyard 1 passes the endoporus of two spacing rings 6; The cross section of the described arm beam of steelyard 1 is a rectangle; The arm beam of steelyard 1 adopts stainless steel or high-quality timber to make; The described arm beam of steelyard 1 is supported on " V " type edge of a knife 4 on supporting seat 5 tops by fulcrum 3.
The center pit of described adjusting knob 2 is fixed on the central shaft of transition gear 18, thereby the central shaft that can drive transition gear 18 when turning knob rotates 18 rotations of drive transition gear.
Described fulcrum 3 is fixed on the arm beam of steelyard 1 between two spacing rings 6; Described fulcrum 3 is the triangular column type, and section is an isosceles triangle; Described fulcrum 3 adopts wimet to make.
The shape of described " V " type edge of a knife 4 is to be provided with one to be used to support fulcrum 3 and the restriction fulcrum 3 random grooves that slide at the top of the derby of a rectangular parallelepiped; Supporting seat 5 tops that described " V " type edge of a knife 4 is fixed between two spacing rings 6; Described " V " type edge of a knife 4 adopts wimet to make.
Described supporting seat 5 is following big top little structure, and described supporting seat 5 adopts metal materials to make; Be fixed with lead on the base of described supporting seat 5, to guarantee the stability of whole device in the weighing process;
Described two spacing rings 6 symmetrical tops that are fixed on supporting seat 5; Described spacing ring 6 is an annular; Described spacing ring 6 usefulness metal materials are made; The effect of spacing ring 6 is that the restriction arm beam of steelyard 1 produces bigger swing and displacement in the weighing process, stablizes the weighing operation.
Described balanced weight 7 is installed on the adjusting screw(rod) 8 in fulcrum 3 left sides on the arm beam of steelyard 1; Between balanced weight 7 and the adjusting screw(rod) 8 by being threaded; Described balanced weight 7 can make its position generation small adjustment to the left or to the right by the rotation of adjusting screw(rod) 8 is regulated; Described balanced weight 7 usefulness stainless steel materials are made; Described balanced weight 7 is used for the preceding balance of regulating the arm beam of steelyard 1 of weighing.
Described adjusting screw(rod) 8 does not have thread, the threaded structure of center section for two ends; Described adjusting screw(rod) 8 partly is installed on two hanging pieces that are fixed in the arm beam of steelyard 1 fulcrum 3 left ends belows by no thread; Described adjusting screw(rod) 8 can be on its position rotates and can't move left and right around the axis hole of fixing the hanging piece on it.
Described levelness direction board 9 is used to indicate arm beam of steelyard levelness; Described levelness direction board 9 is fixed on the front of supporting seat 5; Be carved with the number of degrees on the described levelness direction board 9; Described levelness direction board 9 usefulness aluminium alloys or plastic plate are made.
Described arm beam of steelyard levelness pointer 10 is fixed on the center between two spacing rings 6 on the arm beam of steelyard 1; Described arm beam of steelyard levelness pointer 10 is positioned on the vertical bisector plane by fulcrum 3.
Described proportion rule 11 is engraved in the front on fulcrum 3 right sides on (or being fixed on) arm beam of steelyard 1.
Described suspension groove 13 usefulness plastics or stainless steel are made; Described suspension groove is made of the opposite draw-in groove of both direction up and down, small adjustment can be done (in case adjust in its position on active annular rack 21, it is motionless that its position should keep), be with primary screw on the draw-in groove of bottom, what make that suspension groove 13 can be firm is fixed on initiatively on the annular rack 21, and the draw-in groove on top promptly is used to hang little water tumbler 25; Described suspension groove 13 is done moving to the left or to the right at the mobile lower edge of active annular rack 21 chute 17, does moving to the left or to the right thereby drive the little water tumbler 25 that hangs on it.
Described chute 17 is positioned at the top on fulcrum 3 right sides of the arm beam of steelyard 1, is shaped as a groove; The starting point of described chute 17 is positioned at the fulcrum place, terminal point is positioned near near the triangular column type support cutter 12; Described chute 17 is used to provide the space of suspension groove 13 move left and right on the arm beam of steelyard 1.
Described transition gear 18 is in inside fulcrum 3 positions of the arm beam of steelyard 1; The central shaft of described transition gear 18 passes the center pit of transition gear 18; The vertical assembling of former and later two faces of the central shaft of described transition gear 18 and the arm beam of steelyard 1, the two ends of central shaft are fixed on former and later two faces of the arm beam of steelyard 1; Described transition gear 18 adopts plastics or stainless steel material to make; Described transition gear 18 density everywhere evenly distributes; Described transition gear 18 constitutes an integral body by one little one coaxial big two gears; The ratio of the number of teeth of two gears of size of described transition gear 18 equals their diameter ratio, be the diameter of diameter, pinion wheel of the number of teeth, the gear wheel of the number of teeth, the pinion wheel of the gear wheel of transition gear 18 this is proportional, its ratio is generally more than or equal to 4; Tooth on the described transition gear 18 evenly distributes on its circumference; The tooth pitch of described transition gear 18 should be little tooth pitch, and tooth pitch is less than 1mm.Described transition gear 18 gear wheels equate fully with the thickness of pinion wheel, get at this thickness to be less than or equal to 2mm.On two end faces of described transition gear 18 rib is arranged all, be used to limit the axial dipole field of active annular rack 21 or driven annular rack 22.
Described driving gear 19 is in the position of inside fulcrum 3 right sides of the arm beam of steelyard 1 near the arm beam of steelyard 1 top; The central shaft of described driving gear 19 passes the center pit of driving gear 19; The vertical assembling of former and later two faces of the central shaft of described driving gear 19 and the arm beam of steelyard 1, the two ends of central shaft are fixed on former and later two faces of the arm beam of steelyard 1; Described driving gear 19 adopts plastics or stainless steel material to make; Described driving gear 19 density everywhere evenly distributes; The gear wheel of the diameter of described driving gear 19 and the number of teeth and transition gear 18 is identical; Tooth on the described driving gear 19 evenly distributes on its circumference; The thickness of described driving gear 19 equates fully with the thickness of the gear wheel of transition gear 18; On two end faces of described driving gear 19 rib is arranged, be used to limit the initiatively axial dipole field of annular rack 21.
Described follower gear 20 is in the position of inside fulcrum 3 left sides of the arm beam of steelyard 1 near the arm beam of steelyard 1 top; The central shaft of described follower gear 20 passes the center pit of follower gear 20; The vertical assembling of former and later two faces of the central shaft of described follower gear 20 and the arm beam of steelyard 1, the two ends of central shaft are fixed on former and later two faces of the arm beam of steelyard 1; Described follower gear 20 adopts plastics or stainless steel material to make; Described follower gear 20 density everywhere evenly distributes; The pinion wheel of the diameter of described follower gear 20 and the number of teeth and transition gear 18 is identical; Tooth on the described follower gear 20 evenly distributes on its circumference; The thickness of described follower gear 20 equates fully with the thickness of the pinion wheel of transition gear 18; On two end faces of institute's follower gear 20 rib is arranged, be used to limit the axial dipole field of driven annular rack 22.
Described active annular rack 21 all is in the arm beam of steelyard 1 inside; The tooth of the tooth of described active annular rack 21 and driving gear 19 meshes fully; Described active annular rack 21 is enclosed within on the gear wheel of driving gear 19 and transition gear 18 and is in tensioning state; Be fixed with a suspension groove 13 on the described active annular rack 21, be used to hang little water tumbler 25; The position synchronous of the little water tumbler 25 of its location following when the proportion of weighing solid of the suspension groove 13 on the described active annular rack 21 changes.
Described active annular rack 21 usefulness plastics or stainless sheet steel are made; Described active annular rack 21 density everywhere evenly distributes; Tooth on the described active annular rack 21 evenly distributes; The tooth pitch of described active annular rack 21 equates with the tooth pitch of the gear wheel of driving gear 19 or transition gear 18, thereby the tooth of active annular rack 21 and the tooth of gear wheel driving gear 19 or transition gear 18 is meshed fully; The width of described active annular rack 21 equates with the width of the flank of tooth of the gear wheel of driving gear 19 or transition gear 18.
Described driven annular rack 22 all is in the arm beam of steelyard 1 inside; The tooth of the tooth of described driven annular rack 22 and follower gear 20 meshes fully; Described driven annular rack 22 is enclosed within on the pinion wheel of follower gear 20 and transition gear 18 and is in tensioning state; Be fixed with a servo-actuated counterweight 23 on the described driven annular rack 21, the moment that its weight produces fulcrum 3 is used to offset the moment of the deadweight of little water tumbler 25 in fulcrum 3 right sides and suspension groove 13 to fulcrum 3 generations; Described driven annular rack 22 usefulness plastics or stainless sheet steel are made; Described driven annular rack 22 density everywhere evenly distributes; Tooth on the described driven annular rack 22 evenly distributes; The tooth pitch of described driven annular rack 22 equates with the tooth pitch of the pinion wheel of follower gear 20 or transition gear 18, thereby the tooth of driven annular rack 22 and the tooth of pinion wheel follower gear 20 or transition gear 18 is meshed fully; The width of described driven annular rack 22 equates with the width of the flank of tooth of follower gear 20 or transition gear 18 pinion wheels.
The variation of the suspension groove 13 on the described active annular rack 21 promotes initiatively, and annular rack 21 produces displacement, initiatively the displacement promotion driving gear 19 and the transition gear 18 of annular rack 21 generations rotate, the rotation of driving gear 19 and transition gear 18 promotes driven annular rack 22 and produces displacements, and the displacement of driven annular rack 22 drives servo-actuated counterweight 23 and moves the proportional distance of distance that moves with little water tumbler 25 to the direction opposite with little water tumbler 25.
Described servo-actuated counterweight 23 usefulness stainless steels are made, one end of servo-actuated counterweight 23 is small cylinders, the other end of servo-actuated counterweight 23 has been done a draw-in groove, is furnished with primary screw on the draw-in groove, make servo-actuated counterweight 23 can be fixed on the driven annular rack 22, small adjustment (in case adjust, it is motionless that its position should keep) can be done in the position of servo-actuated counterweight 23 on driven annular rack 22
Described object hangs mesh bag 24 and is made up of two parts: a part is for hanging the plastics cords, and another part is the little mesh bag that plastic filament is worked out; Described object hangs mesh bag 24 and is suspended on when the proportion of the utility model weighing solid on the fulcrum 3 left side fulcrums 3 and the fixed position between the balanced weight 7 of the arm beam of steelyard 1;
Described little water tumbler 25 is cylindrical or multi-edge column-shaped; The suspension cord of described little water tumbler 25 with certain intensity, do not have absorptive plastics cord to make, in order to avoid the water that overflows is adsorbed on the suspension cord, thereby guarantee the weighing precision of specific gravity balance from cup; Described little water tumbler 25 is suspended on when the proportion of the utility model weighing solid on the suspension groove 13 on fulcrum 3 right sides of the arm beam of steelyard 1; Described little water tumbler 25 before the proportion of weighing solid, be placed on big water tumbler notch under make and after tested solid is put into big water tumbler, to cause water after its notch overflows, can all flow into little water tumbler 25.
Described big water tumbler adopts the transparent material engineering plastics to make; Described big water tumbler is cylindrical or multi-edge column-shaped, and the rim of a cup top has a notch that is lower than glass edge; Carve a circle horizontal line around described big water tumbler notch peak and the rim of a cup.
Embodiment 2:
As Fig. 5～shown in Figure 9, comprise the arm beam of steelyard 1, adjusting knob 2, fulcrum 3, " V " type edge of a knife 4, supporting seat 5, spacing ring 6, balanced weight 7, adjusting screw(rod) 8, levelness direction board 9, arm beam of steelyard levelness pointer 10, proportion rule 11, suspension groove 13, digital DC table 15, multiturn potentiometer 16, chute 17, transition gear 18, driving gear 19, follower gear 20, initiatively annular rack 21, driven annular rack 22, servo-actuated counterweight 23, object hang mesh bag 24, little water tumbler 25, electric battery 26 etc.
The circuit that the utility model adopts digital DC table 15, multiturn potentiometer 16 and electric battery 26 to form shows by the proportion of weighing solid.
The digital DC ammeter that described digital DC table 15 can be provided with for range ability; Described digital DC table 15 is used to show the rate of specific gravity by the weighing solid; Described digital DC table 15 is fixed on the supporting seat 5.
The turning axle of described multiturn potentiometer 16 is fixed on the arm beam of steelyard 1 fulcrum 3 over against the centre of position; The turning axle of described multiturn potentiometer 16 is as the central shaft of transition gear 18, and the rotation of transition gear 18 drives the rotation of the turning axle of multiturn potentiometer 16; The center tap of described multiturn potentiometer 16 and stiff end lead-in wire and direct supply and digital DC table 15 built-up circuit loop.The zero point of described multiturn potentiometer 16 is corresponding with suspension groove 13 fulcrum 3 positions on the arm beam of steelyard 1; Described multiturn potentiometer 16 adopts the copper-manganese potentiometer of better heat stability;
The principle of the proportion of the utility model weighing solid is:
Earlier object is hung the fixed position that mesh bag 24 is suspended on fulcrum 3 left sides on the arm beam of steelyard 1 before the proportion of a certain solid of weighing, fulcrum 3 right sides do not hang any article, then adjust the balanced weight 7 in fulcrum 3 left sides, make fulcrum 3 both sides of the arm beam of steelyard 1 reach balance; Again big water tumbler is just filled water and do not overflow and the maintenance level and simultaneously little water tumbler 25 be placed on big water tumbler notch under, (proportion of supposing tested solid is that γ, volume are V then tested solid to be put into object suspension mesh bag 24, then the weight of tested solid is that V * γ) also slowly putting into big water tumbler all is immersed in water until tested solid, at this moment the water in the big water tumbler will flow in the little water tumbler 25 that is placed under it from its notch, no longer includes water and flow in the little water tumbler 25 in big water tumbler; Then the interior object that tested solid arranged is hung mesh bag 24 and from big water tumbler, slowly propose to the cup (water not being taken out of when object is mentioned in attention) from cup; Because all immersing in the big water tumbler of filled with water, tested solid cause the volume that from big water tumbler, flow into the water in the little water tumbler 25 to equate fully like this with the volume of tested solid, the volume that promptly flow into the water in the little water tumbler 25 is that (because object hangs mesh bag 24 is to make of superfine material to V, volume after it immerses in the water can be ignored), the proportion of supposing water is 1g/cm
3, then above-mentioned steps carries out that the weight of water is 1 * V in the little water tumbler 25 in back.Then have the object suspension mesh bag 24 of tested solid to be suspended on the fixed position in fulcrum 3 left sides on the specific gravity balance arm beam of steelyard 1 interior, the distance of supposing 3 at this position and fulcrum is L; In addition the interior little water tumbler 25 that fills water is suspended on the suspension groove 13 on right side of the arm beam of steelyard 1 fulcrum 3 and causes its position on the arm beam of steelyard 1 to change (to the situation of the proportion of digital display meausring apparatus weighing solid by adjusting to adjusting knob 2, then the position of the slider of multiturn potentiometer 16 also changes causing the position of little water tumbler 25 on the arm beam of steelyard 1 to change by the adjusting to adjusting knob 2 when, thereby corresponding variation also takes place in its resistance) until fulcrum 3 left sides by the suspension groove 13 on the moment of weighing solid and 23 pairs of fulcrums 3 of servo-actuated counterweight and fulcrum 4 right sides, the moment of fulcrum 3 is reached balance (to the situation of the proportion of digital display meausring apparatus weighing solid, the position of the slider of multiturn potentiometer 16 no longer changes when fulcrum 3 left and right sides reach balance to the moment of fulcrum 3) to water in little water tumbler 25 and the cup thereby the arm beam of steelyard 1 is up to the standard; Suppose by the weight of weighing solid be G, the weight that is fixed on the servo-actuated counterweight 23 on the driven annular rack 22 is G
2, the weight of supposing water in the little water tumbler 25 again is G
3, the weight sum that is fixed on suspension groove 13 and little water tumbler 25 (comprising its suspension cord) on the annular rack 21 initiatively is G
1, the distance of 3 at its position and fulcrum was L when little water tumbler 25 was suspended on the suspension groove 13 of the arm beam of steelyard 1
1, the distance that servo-actuated counterweight 23 and fulcrum are 3 is L
2, (to the situation of the proportion of digital display meausring apparatus weighing solid, the resistance of multiturn potentiometer 16 is R, and the displayed value of corresponding digital direct current table 15 is I=U ÷ R) then has according to lever balance theory:
G×L+G
2×L
2＝(G
1+G
3)×L
1
Then be fixed on the weight G of the servo-actuated counterweight 23 on the driven annular rack 22
2With the weight sum G that is fixed on suspension groove 13 and little water tumbler 25 on the annular rack 21 initiatively
1Between have following relation: the diameter of the gear wheel of supposition transition gear 18 is R
1, the diameter of its pinion wheel is R
2, the number of teeth of the gear wheel of transition gear 18 is N
1, the number of teeth of pinion wheel is N
2, then have
R
1∶R
2＝N
1∶N
2＝G
2∶G
1
Be π R
1: π R
2=G
2: G
1
G
2×πR
2＝G
1×πR
1
If servo-actuated counterweight 23 and the starting point of suspension groove 13 all are adjusted at the position (being that starting point overlaps) at fulcrum 3 places on the arm beam of steelyard 1, L is arranged then
2=π R
2, L
1=π R
1
G is promptly arranged
2* L
2=G
1* L
1
Thereby G * L=G
3* L
1
V×γ×L＝V×1×L
1
Be γ=L
1÷ L
Situation to the proportion of digital display meausring apparatus weighing solid then has
γ＝k×(U÷R)
＝k×I
Wherein I is the electric current that digital direct current table 15 shows when the proportion of the tested solid of weighing.
L is a fixed value in the following formula, then the proportion γ=L of solid
1÷ L=k * I.Like this, as long as L
1From the L of length to 20L value substitution γ=L
1It is 1g/cm that ÷ L just can obtain corresponding numerical value
3To 20g/cm
3Rate of specific gravity, promptly if between the right side of fulcrum 3 on the arm beam of steelyard 1 and the fulcrum 3 apart L, 2L, 3L ... 20L equal length value replaces and can directly carve rate of specific gravity on the proportion rule 11 on the arm beam of steelyard 1 with corresponding rate of specific gravity, again 0～L, L～2L, 2L～3L ... these line segments such as 19L～20L are divided into ten five equilibriums, can obtain more high-precision scale value; During proportion at the weighing solid after carrying out scale as stated above on the proportion rule 11 on the arm beam of steelyard 1 when the arm beam of steelyard 1 fulcrum 3 both sides reach balance the suspension cord of the little water tumbler 25 of plastics where be adjusted in, corresponding locational proportion scale value is the proportion of this tested solid (to the situation of the proportion of digital display meausring apparatus weighing solid, then can be by the displayed value on the digital DC table 15 being adjusted into the method for corresponding rate of specific gravity, make on the digital DC table 15 displayed value just with the arm beam of steelyard 1 on scale value in full accord), at this, γ and L
1Between relation be linear relationship, the scale of γ is uniform on the arm beam of steelyard 1.As seen utilize this weight and proportion meausring apparatus can directly weigh up the proportion of (rather than calculating) solid, and do not need to know the weight of this solid and the concrete numerical value of volume.
Claims (8)
1. proportion meausring apparatus, comprise the arm beam of steelyard (1), supporting seat (5), two spacing rings that raise up (6) about the top of described supporting seat (5) is provided with, the arm beam of steelyard (1) passes the endoporus of two spacing rings (6), and fulcrum (3) is fixed between last two spacing rings of the arm beam of steelyard (1) (6); Supporting seat (5) top between two spacing rings (6) is provided with V-knife mouth (4), and the arm beam of steelyard (1) is supported on the V-knife mouth (4) by fulcrum (3); The center pit of adjusting knob (2) and the center pit of transition gear (18) together are fixed on the central shaft on the vertical bisector plane of the fulcrum (3) that passes on the arm beam of steelyard (1); Balanced weight (7) is installed in the arm beam of steelyard (1) and goes up on the adjusting screw(rod) (8) in fulcrum (3) left side, between balanced weight (7) and the adjusting screw(rod) (8) by being threaded; Levelness direction board (9) is fixed on the front of supporting seat (5); Be carved with the number of degrees on the described levelness direction board (9); Arm beam of steelyard levelness pointer (10) is fixed on the arm beam of steelyard (1); The front that the arm beam of steelyard (1) is gone up fulcrum (3) right side is carved or be fixed on to proportion rule (11); The central shaft two ends of transition gear (18) are fixed on former and later two faces of the arm beam of steelyard (1); The central shaft two ends of driving gear (19) are fixed on former and later two faces of the arm beam of steelyard (1); The central shaft two ends of follower gear (20) are fixed on former and later two faces of the arm beam of steelyard (1); Initiatively annular rack (21) is enclosed within on the gear wheel of driving gear (19) and transition gear (18); Be fixed with a suspension groove (13) on the no flank of tooth of the upper gear rack of described active annular rack (21); Driven annular rack (22) is enclosed within on the pinion wheel of follower gear (20) and transition gear (18); Be fixed with a cylinder or prismatic servo-actuated counterweight (23) on the no flank of tooth of the lower gear rack of described driven annular rack (21); It is characterized in that: the described arm beam of steelyard (1) is gone up the suspension groove (13) on fulcrum (3) right side and is gone up the little water tumbler (25) that hangs weighing solid proportion, object hangs mesh bag (24) and is suspended on the arm beam of steelyard (1) between fulcrum (3) and the balanced weight (7), makes the right side move left and right of the little water tumbler (25) of weighing solid proportion at the arm beam of steelyard (1) by turn adjusting knob (2).
2. a kind of proportion meausring apparatus as claimed in claim 1, it is characterized in that: be positioned at by a multiturn potentiometer of center fixed (16) on the vertical bisector plane of fulcrum (3) spigot shaft coaxle of the turning axle of multiturn potentiometer (16) and adjusting knob (2) or transition gear (18) on the described arm beam of steelyard (1); Described digital DC table (15) is fixed on the supporting seat (5); The center tap of described multiturn potentiometer (16) and a stiff end go between and electric battery (26) and digital DC table (15) built-up circuit loop.
3. a kind of proportion meausring apparatus as claimed in claim 1 or 2 is characterized in that: described transition gear (18) adopts plastics or stainless steel material to make; Density on the described transition gear (18) evenly distributes; Described transition gear (18) constitutes an integral body by one little one coaxial big two gears; The ratio of the number of teeth of two gears of size of described transition gear (18) equals their diameter ratio, and its ratio is generally more than or equal to 4; Tooth on the described transition gear (18) evenly distributes on its circumference; The tooth pitch of described transition gear (18) is less than 1mm; On two end faces of described transition gear (18) rib is arranged all.
4. a kind of proportion meausring apparatus as claimed in claim 1 is characterized in that: described driving gear (19) adopts plastics or stainless steel material to make; Density on the described driving gear (19) evenly distributes; The diameter of described driving gear (19) and the number of teeth equate fully with the gear wheel of transition gear (18); Tooth on the described driving gear (19) evenly distributes on its circumference; The thickness of described driving gear (19) equates with the thickness of the gear wheel of transition gear (18); On two end faces of described driving gear (19) rib is arranged.
5. a kind of proportion meausring apparatus as claimed in claim 1 is characterized in that: described follower gear (20) adopts plastics or stainless steel material to make; Density on the described follower gear (20) evenly distributes; The diameter of described follower gear (20) and the number of teeth equate with the pinion wheel of transition gear (18); Tooth on the described follower gear (20) evenly distributes on its circumference; The thickness of described follower gear (20) equates with the thickness of the pinion wheel of transition gear (18); On two end faces of institute's follower gear (20) rib is arranged.
6. a kind of proportion meausring apparatus as claimed in claim 1 is characterized in that: described active annular rack (21) is made of plastics or stainless sheet steel; Density on the described active annular rack (21) evenly distributes; Tooth on the described active annular rack (21) evenly distributes; The tooth pitch of described active annular rack (21) equates with the tooth pitch of the gear wheel of driving gear (19) or transition gear (18); The width of described active annular rack (21) equates with the width of the flank of tooth of the gear wheel of driving gear (19) or transition gear (18).
7. a kind of proportion meausring apparatus as claimed in claim 1 is characterized in that: described driven annular rack (22) is made of plastics or stainless sheet steel; Density on the described driven annular rack (22) evenly distributes; Tooth on the described driven annular rack (22) evenly distributes; The tooth pitch of described driven annular rack (22) equates with the tooth pitch of the pinion wheel of follower gear (20) or transition gear (18); The width of described driven annular rack (22) equates with the width of the flank of tooth of follower gear (20) or transition gear (18) pinion wheel.
8. a kind of proportion meausring apparatus as claimed in claim 1 is characterized in that: the gear wheel diameter of described transition gear (18) is R
1, the number of teeth is N
1, the diameter of its pinion wheel is R
2, the number of teeth is N
2, then be fixed on the weight G of the servo-actuated counterweight (23) on the driven annular rack (22)
2Be fixed on the suspension groove (13) on the annular rack (21) initiatively and the weight sum G of little water tumbler (25)
1Between have a relation:
R
1∶R
2＝N
1∶N
2＝G
2∶G
1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202553808U CN201589745U (en) | 2009-11-09 | 2009-11-09 | Proportion weighing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202553808U CN201589745U (en) | 2009-11-09 | 2009-11-09 | Proportion weighing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201589745U true CN201589745U (en) | 2010-09-22 |
Family
ID=42749532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202553808U Expired - Fee Related CN201589745U (en) | 2009-11-09 | 2009-11-09 | Proportion weighing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201589745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255140A (en) * | 2020-10-10 | 2021-01-22 | 柳州工学院 | Intelligent liquid density detector |
-
2009
- 2009-11-09 CN CN2009202553808U patent/CN201589745U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255140A (en) * | 2020-10-10 | 2021-01-22 | 柳州工学院 | Intelligent liquid density detector |
| CN112255140B (en) * | 2020-10-10 | 2023-07-25 | 柳州工学院 | Intelligent detector for liquid density |
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Granted publication date: 20100922 Termination date: 20151109 |