CN204373754U - The checking weight weigh that slideway is weighed - Google Patents

Abstract

The checking weight weigh that slideway is weighed, it comprises the 3rd bracing frame and the 4th bracing frame, and the 3rd bracing frame is provided with LOAD CELLS, and LOAD CELLS is provided with tilted-putted slideway of weighing; 4th bracing frame is provided with and rejects platform and reject classification mechanism; Rejecting platform is placed in below the discharging opening of slideway of weighing; Slideway of weighing is rigidly connected by force-guided stem and LOAD CELLS force side, and the design Impact direction of LOAD CELLS is B with the angle of slideway material line of travel of weighing, 0 ° of < B <, 90 ° or 90 ° < B < 180 °.Weigh slideway rear end with rejecting platform front end have spacing relatively, not to contact, its height solves rotating moving part in current go-on-go scale Weighing unit higher than rejecting platform front end and has a strong impact on the problem of weighing precision, economy, practicality and efficiency, and rejecting grading plant affects weighing precision and manufactures the problem of debugging with maintenance cost.

Description

The checking weight weigh that slideway is weighed

Technical field

This programme relates to the checking weight weigh that a kind of slideway is weighed, and is mainly used in the automatic dynamic weight detecting of interrupted lump material, rejecting or classification.

Background technology

Checking weight weigh is also called go-on-go scale, sorting scale, screening scale, sorts scale, heavily examines scale, classification scale, multipass sort scale, weight label scale etc., (also can use by unit mainly for the production of line or packaging line, also can Manual feeding to material loading feeder), dynamically online Dynamic Weighting, monitoring, record, FEEDBACK CONTROL, subsides weight or price tag are carried out to product weight, also can by preset weight range product is sorted, classification, rejecting.Interrupted lump material includes but not limited to hard ware material, softer, elastic material, bagged material, case dress material, bottled material, box-packed material, lashing materials, serial connection material, binding material.

Existing checking weight weigh is primarily of following four parts compositions: electrical control gear, claimed the material loading feeder of article, Weighing unit, reject grading plant.Material loading feeder, Weighing unit, reject grading plant material transmit plane all successively, be arranged in parallel on same level straight line, be all transmit material by respective power belt; Electric control system controls three power belt uniform rotation, physical construction restriction belt upper surface rectilinear motion, not sideslip.The mechanism driving the belt on bracket to transmit material again by the cylinder on drive motor, Timing Belt drive bracket, cylinder is called for short power belt.

The Weighing unit of checking weight weigh is primarily of Weighing control instrument, LOAD CELLS, weighing platform composition, and weighing platform is rigidly connected LOAD CELLS, LOAD CELLS electrical connection Weighing control instrument.Weighing platform is horizontally disposed, and the design Impact direction of LOAD CELLS is vertical with weighing platform.

The weighing platform of existing checking weight weigh adopts power belt, is arranged horizontally, power belt of weighing.The power belt upper surface palpus uniform rectilinear that weighs runs between guarantee belt and material does not have friction force, can not have interference to LOAD CELLS.If travel at the uniform speed non-, by causing, output torque that is suddenly big or suddenly small with the friction force of material, drive motor is also suddenly big or suddenly small, and this all affects the output of LOAD CELLS.

The rejecting grading plant of existing checking weight weigh is made up of (being used as to transmit material and rejecting operating table surface) rejecting platform, (perform reject operation) rejecting classification mechanism and bracing frame thereof.The rejecting platform of existing checking weight weigh also adopts power belt, is called for short and rejects power synchronous belt.It need with power belt keeping parallelism of weighing, closely, level be relative, and must remain the Complete Synchronization of the linear velocity of its power belt and power belt of weighing in operation, upper surface also does linear uniform motion.

In fact, material is the same high with the requirement of rejecting power belt for the requirement of material loading feeder power belt at the linear uniform motion on power belt of weighing.The material loading feeder of the go-on-go scale of prior art is indispensable.

There is the following problem caused by rotary part in the power belt of weighing of existing checking weight weigh: 1, the vibrations that cause of the rotatable parts unbalance mass, such as drive motor, Timing Belt, feed belt, cylinder or beat and have a strong impact on weighing precision always; 2, drive motor cable affects the free of Weighing unit with extraneous connection and then affects weighing precision; 3, the inert weight of physical construction own also affects weighing precision; The high-accuracy mechanical processing of running gear (as cylinder for ensure belt not sideslip need be processed into curved surface, need dynamic balance treatment and high linearity, surface to need hard, wear-resistant, belt needs softness, balance, wear-resisting) cost impact economy, the maintenance cost of checking weight weigh weighing unit; 4, the speed limit decision go-on-go efficiency of each rotary part cannot significantly improve; 5, rotary part is difficult to realize the usable range that high-grade water, dirt, corrosion protection and food medical and health require seriously to constrain go-on-go scale weighing unit; 6, the non-linear uniform motion of belt, also to be weighed output by the torque influence of the friction force of material and drive motor.That is, belt travel at the uniform speed very high to the technical requirement of drive motor and electric control system.

There is following problems when material moves into from power belt of weighing in the rejecting power synchronous belt of existing checking weight weigh: rejecting that power belt is high or low than power belt of weighing all can by the material web transmission to weigh power belt and LOAD CELLS external force, especially at the component of the vertical direction of material traffic direction; If rejected, power belt is low can not touch power belt of weighing with when rejecting power belt to material simultaneously, when material moves on to the discharge end of power belt of weighing, because material can overturn lower end forward, the reacting force of a roll circumference part direction change of power belt can be given in its rear end.Do not have external force, material will make linear uniform motion; Otherwise the rectilinear motion as long as material can not remain a constant speed, will produce various reacting force by symmetrical ponderomotive force belt; These are by impact and the weighing data of interfere with subsequent material and weighing precision.So no matter be theoretical or prior art, symmetrical pipe band is parallel, horizontally disposed, uniform rotation all to require rejecting belt to keep, and synchronous with belt speed of weighing.1, based on above-mentioned impact, prior art requires to weigh belt and reject power belt all to keep horizontally disposed, and requiring to reject support height below power belt can accurate adjustment, and on-the-spot adjustment also need by surveyor's staff, and site installation test is pretty troublesome.2, after maintenance level, for guaranteeing that material is when leap two belts, do not affect, disturb weighing precision, also require that rejecting grading plant remains the linear velocity of its power belt and the Complete Synchronization of power belt of weighing aborning, so, prior art is all adopt the accurate power belt that the drive motor, Timing Belt, belt, cylinder etc. of costliness be made up of the same with power belt of weighing, and also has comparatively hi-tech requirement to field adjustable and electric control system; Manufacturing cost is high.3, during powerful material separating, the weighing data of the material can crossing over seam by the next one to next material again produces interference.4, powerful rejecting is worn and torn very greatly to belt frequently, and expensive belt brings again very high maintenance cost.So existing checking weight weigh rejects grading plant not only affects weighing precision, manufacture, debugging and maintenance cost are also higher.Visible, in prior art, the weigh rotating moving part of power belt and expensive rejecting power synchronous belt of level has all had a strong impact on (comprising the power belt of material loading feeder) weighing precision of checking weight weigh, economy, practicality and efficiency.

Summary of the invention

For the problem of the rotating moving part of the power belt of weighing of existing checking weight weigh, this programme adopts the slideway of weighing tilted to replace power belt of weighing, utilize and transmit material from the initial velocity of production line or material loading feeder or artificial material and gravitional force, it is used as weighing platform simultaneously, completely eliminates and rotate caused problem.

For the problem of the rejecting power synchronous belt of checking weight weigh costliness, this programme propose two schemes: scheme 1, the below of slideway discharge end of weighing adopt reject slideway, allow material lean on it to leave initial velocity when weighing slideway and gravitional force slides teaching display stand transmission on slideway, reject classification and also carry out on slideway; Reject grading plant no longer because affecting the weighing precision of weighing unit when material cross-over connection is stitched.Scheme 2, the common motive power belt adopting common drive motor, common belt, common cylinder in the below of slideway discharge end of weighing, do not need the common electric control project composition of synchro control.This two schemes rejecting power belt team be eliminated when seam crossed over by material in existing checking weight weigh weighs the interference of power belt.

The technical measures that this programme is taked are: the checking weight weigh that a kind of slideway is weighed, and it comprises the 3rd bracing frame and the 4th bracing frame, and the 3rd bracing frame is provided with LOAD CELLS, and LOAD CELLS is provided with tilted-putted slideway of weighing; 4th bracing frame is provided with and rejects platform and reject classification mechanism; Rejecting platform is placed in below the discharging opening of slideway of weighing; Slideway of weighing is rigidly connected by force-guided stem and LOAD CELLS force side, and the design Impact direction of LOAD CELLS is B with the angle of slideway material line of travel of weighing, 0 ° of < B <, 90 ° or 90 ° < B < 180 °; Weigh slideway rear end with rejecting platform front end dock and leave gap.

The concrete feature of this programme also has, slideway of weighing be one with material surface of contact be smooth groove, groove surface axis and horizontal plane angle are A(0 ° of < A < 90 °) the rigid slideway of inclination, or be smooth flat, smooth flat and horizontal plane angle are A(0 ° of < A < 90 °) the rigid slideway of inclination, or be smooth socket, smooth tube axis and horizontal plane angle are A(0 ° of < A < 90 °) the rigid slideway of inclination.

Rejecting platform is reject slideway or common motive power belt.

Rejecting slideway is the smooth rigid plane made with hard wear-resistant material, and material inlet end both sides are provided with striker plate.Object prevents material side to skidding off, especially for rejecting sliding material direction, the material road layout inconsistent on downward projection face with slideway material direction of weighing.Generally, the material movement direction length of tilted-putted rejecting slideway be weigh slideway 1-6 doubly.

Also be provided with the first bracing frame; First bracing frame is provided with material loading feeder and is electrically connected electrical control gear; At material loading feeder and weigh between slideway and be provided with feeding slideway.

Also be provided with the second bracing frame; Second bracing frame is provided with tilted-putted feeding slideway; The feeding end of feeding slideway docks with material loading feeder discharge end and leaves gap, and the feeding end of feeding slideway is lower than material loading feeder; The discharge end of feeding slideway is higher than slideway feeding end of weighing, and feeding slideway is parallel with slideway of weighing, and feeding slideway discharge end docks with the feeding end of slideway of weighing and leaves gap.

Axis, feeding slideway bottom surface is same straight line with axis, slideway bottom surface of weighing; Its projection on material planing bottom can have different cross section profile, and as funnel-form, horn-like, the cross section profile of feeding slideway is consistent with the cross section profile of slideway of weighing at discharging opening.

Feeding slideway is that make with hard wear-resistant material with rigid body that is material surface in contact unusual light, and slideway of weighing adopts same material, same lubricant method.

First bracing frame, the second bracing frame, the 3rd bracing frame, the 4th bracing frame are independently; Or first bracing frame and the second bracing frame be integrated, the 3rd bracing frame is independent, and the 4th bracing frame is independent; Or first bracing frame and the second bracing frame, the 3rd bracing frame be integrated, the 4th bracing frame is independent; Or first bracing frame and the second bracing frame, the 3rd bracing frame, the 4th bracing frame be integrated; Or first bracing frame independent, the second bracing frame and the 3rd bracing frame in one, the 4th bracing frame independence; Or first bracing frame and the second bracing frame, the 4th bracing frame be integrated, the 3rd bracing frame is independent; Or first bracing frame and the second bracing frame, the 4th bracing frame be integrated, the 3rd bracing frame is independent; Or first bracing frame and the 4th bracing frame one, the second bracing frame is independent, the 3rd bracing frame is independent; Or first bracing frame independent, the second bracing frame and the 4th bracing frame are integrated, the 3rd bracing frame independence.All bracing frames are all rigidity, and its absolute position and relative position do not move because material movement passes through.

The plane vertical with the design Impact direction of LOAD CELLS and horizontal plane angle are D, 0 °≤D≤≤ 90 °.The scheme of weighing precision the best is: A+B=D+90 °.

Reject the material line of travel of platform, can be parallel with the material line of travel of slideway of weighing; Can with plane-parallel; Also angle C can be had with level; Can also be inconsistent with the material direction of weighing on slideway on downward projection face.

Also comprise the Weighing control instrument be electrically connected with LOAD CELLS; Respectively with the electrical control gear of rejecting classification mechanism, Weighing control instrument is electrically connected.

Feeding slideway can with slideway different length of weighing.For hard ware material, the distance sum that when its length is greater than length and the material loading of the most length direction of material and slideway contacting surface, material aloft flies over; For soft material, its length is greater than 0.6 times of distance sum of flying over material during material loading of the length of the most length direction of material and slideway contacting surface aloft.

Slideway and the material contact portion of weighing can cover the lubricant such as grease, hairbrush.

Slideway of weighing should be greater than 1.3 times of material longest dimension along material line of travel length.

Common motive power belt is the power belt of electric control project adopting the drive motor of ordinary skill requirement on market, belt, cylinder, do not have linear velocity synchro control to require.

The beneficial effect of this programme is: 1, this programme (is A with horizontal plane angle with a slant setting, 0 ° of < A < 90 °) rigid slideway (being called slideway of weighing), be used as the platform transmitting material and weigh simultaneously.This slideway is enough little to the friction energy-dissipating of material, and material does not rely on exterior power and drives, only relies on initial inertia and gravitional force just to can slide past this slideway, and Weighing control instrument can complete dynamic weighing in this process; This tilted-putted slideway of weighing instead of level and to weigh power belt, eliminates head roll, follower rollers, belt, bearing, motor, Timing Belt, and level power belt of weighing is reduced to a smooth inclination weighing platform.Utilize initial velocity and the potential energy of material, slip over less energy loss slideway of weighing, and in this process dynamic weighing; This largely solves the dynamic weighing precision problem of checking weight weigh.Concrete effect is as follows: (1) scale body does not have level to weigh the intrinsic rotary part of power belt, scale running body amount of unbalance and vibrations interference thereof would not be produced, also eliminate drive motor cable and contact interference with extraneous, weighing precision can improve greatly.(2) there is no running gear, significantly reduce manufacturing cost.(3) impost of this body structure alleviates greatly, can greatly be improved by the ratio claiming the weight of material to account for transducer range.(4) do not have moving component to be easy to realize the high-grade water of metering units, wet, dirt, corrosion protection and the requirement of food medical and health, meet the dynamic weighing requirement of more occasions, the market of dynamic weigher will be larger.(5) have a strong impact on the efficiency of existing go-on-go scale because belt speed is limited, and this programme just need only can realize quick check weighing by adjustment material loading speed.(6) not to the requirement that travels at the uniform speed of belt, extremely low to the technical requirement of electric control system.

2, slideway (by force-guided stem) of weighing is rigidly connected with LOAD CELLS, and the design Impact direction of LOAD CELLS is B(0 ° of < B < 90 ° or 90 ° < B < 180 ° with the angle of slideway material line of travel of weighing).After according to field condition and material, the friction factor to slideway of weighing determines the horizontal sextant angle A of slideway of weighing,, its bearing end design Impact direction limited to LOAD CELLS setting angle is B(0 ° of < B < 90 ° or 90 ° < B < 180 ° with slideway material line of travel angle of weighing) time, effective sensor signal can be realized and export.B is more close to 90 °, and the output of LOAD CELLS is larger.B more departs from 90 °, the LOAD CELLS just needing sensitivity higher and Weighing control instrument and suitable weighing data process software.

3, adopt rejecting grading plant, improve weighing precision (comprising degree of protection), reduce manufacturing cost and use cost and degree of protection.

(1) the rejecting platform of rejecting grading plant adopts rejects slideway, below the discharging opening being placed in aforementioned slideway of weighing, is used as the platform transmitting material and reject classification simultaneously; This rejecting slideway must not affect material to the friction energy loss of material and rely on the speed left when weighing slideway and remaining potential energy to continue to slide over rejecting slideway.The program saves manufacturing cost greatly than adopting the rejecting grading plant of power belt; Also because do not have rotatable parts and belt can greatly improve water proof and dust proof and sanitary grade.

Reject slideway below the discharging opening of slideway of weighing, if relative with slideway small drop of weighing, parallel small distance, the output of seam on LOAD CELLS crossed over by material does not almost affect that (small drop LH can be, 0.1mm < LH < 10.0mm, and small distance LP can be, 0.1mm < LP < 10.0mm).

Reject slideway below the discharging opening of slideway of weighing, if rejecting slideway and horizontal sextant angle C are greater than weigh slideway and horizontal sextant angle A, when material self-weighing slideway slides and dishes out, also very little on the output impact of LOAD CELLS.

Reject slideway below the discharging opening of slideway of weighing, if C is less than A, as long as their phase mutual edge distance meets material leave slideway of weighing when falling and rejecting on slideway, then LOAD CELLS is also affected very little.

(2) the rejecting platform of rejecting grading plant adopts common motive power belt, below the discharging opening being placed in aforementioned slideway of weighing, is used as the platform transmitting material and reject classification simultaneously.No longer need have strict position and the matching relationship of speed with power belt of weighing; No longer need the synchronous requirement of belt.So, no longer affect the weighing precision of power belt of weighing; Eliminate the on-the-spot horizontal adjustment to weighing platform, expensive belt maintenance cost.In a word, the program also improves weighing precision, reduces manufacturing cost and use cost.The various positions of common motive power belt below slideway discharging opening of weighing can refer to the layout rejecting slideway.

4, between material loading feeder and the inclination weighing platform (i.e. tilted-putted slideway of weighing) of Weighing unit, tilted-putted feeding slideway is provided with, eliminate material between two transition time impulsive disturbance that LOAD CELLS is caused, substantially increase weighing precision.

Because, article two, the zone of transition between feed belt is exactly the zone of transition between two circular arcs, the seam that one is greater than diameter length is had between circular arc and the upper summit of circular arc, namely material will produce overshoot response when crossing over the seam between material loading feeder and the power belt of Weighing, has a strong impact on the output of LOAD CELLS.One of affected factor of former checking weight weigh scheme precision that Here it is.

And if this programme removes feeding slideway, allow material directly directly rush to slideway of weighing from material loading feeder, then can export LOAD CELLS and bring very large interference.Between the belt roller of material loading feeder and the flat board of slideway of weighing, be in fact exactly that a circular arc is to a straight line.At their seam crossing, cylinder will walk downward with belt, and the flat board of slideway of weighing is motionless, so material will be made not to be stuck just needs flatbed horizontal position as far as possible toward moving down, even lower than cylinder axis level; But as the flat board of slideway of weighing, so high drop will bring great impact to LOAD CELLS; This is conflict.So, increase with weigh a slideway parallel relative feeding slideway between slideway at material loading feeder and can effectively address this problem with weighing.That is, first cushioned the impact of that drop by feeding slideway, more reposefully material is served slideway of weighing.

5, this programme only has rate request to material loading feeder after arranging feeding slideway, there is no accuracy requirement synchronously or at the uniform velocity, namely, the initial velocity of material and potential energy need only be made to meet and to slip over feeding slideway, weigh slideway and reject slideway, cost is extremely low, optional, available production line or manually replace.

Accompanying drawing explanation

Fig. 1 is the structure composition schematic perspective view of this programme; In figure: material loading feeder is horizontally disposed, feeding slideway 3, weigh slideway 5 and reject slideway 8 with level be all same angle, parallel closely relative, reduce highly successively.Fig. 2 is the structural front view of this programme; Fig. 3 is the structure vertical view of this programme.

Fig. 4 is this programme LOAD CELLS scheme of installation.In figure, weigh slideway and horizontal sextant angle is A, the design Impact direction (in figure large arrow S direction) of LOAD CELLS force side is B(0 ° of < B < 90 ° or 90 ° < B < 180 ° with the angle of slideway material line of travel of weighing), the plane vertical with the design Impact direction of LOAD CELLS and horizontal plane angle are D, 0 °≤D≤90 °.

Fig. 5 is that a kind of slideway of rejecting is not parallel and have the enforcement illustration of larger drop with slideway of weighing: material loading feeder is horizontally disposed, feeding slideway is parallel closely relative with slideway of weighing, the slideway of weighing tilted, the rejecting slideway of inclination is not parallel with slideway of weighing, reject slideway distance slideway of weighing exceedes material length, in the below of weighing slideway discharging opening.

The composition schematic perspective view that Fig. 6 is employing horizontal material loading feeder, grading plant rejected by the feeding slideway of inclination and parallel relative slideway of weighing, horizontal power belt.

The composition front view that Fig. 7 is employing horizontal material loading feeder, grading plant rejected by the feeding slideway of inclination and parallel relative slideway of weighing, horizontal power belt.

Fig. 8 is prior art checking weight weigh structural front view.

In figure: 1-material loading feeder; 2-feeding baffle plate; 3--feeding slideway; 4-photoelectric detection system; 5-weighs slideway; 6-LOAD CELLS; 7-(power belt) reject grading plant; 8-rejects slideway; 9-rejects classification mechanism; 10-material; 11-first bracing frame; 12-second bracing frame; 13-the 3rd bracing frame; 14-the 4th bracing frame; 15-Weighing control instrument; 16-electrical control gear; 17-material-receiving device; 18-level is weighed power belt (that is: horizontal weighing platform); The feed belt of 21-material loading feeder; 23-head roll and Timing Belt; 24-bracket; The feed belt of 25-metering units; 26-follower rollers; 30-drive motor; 31-brace table; 34-force-guided stem.

Embodiment

embodiment 1:

As shown in Figure 1-2, the checking weight weigh that a kind of slideway is weighed, it comprises 3rdbracing frame 13 and the 4th bracing frame 14, the 3rd bracing frame 13 is provided with LOAD CELLS 6, and LOAD CELLS 6 is provided with tilted-putted slideway 5 of weighing; 4th bracing frame 14 is provided with and rejects platform and reject classification mechanism 9; Rejecting platform is placed in below the discharging opening of slideway 5 of weighing; Slideway 5 of weighing is rigidly connected by force-guided stem 34 and LOAD CELLS 6 force side, and the design Impact direction of LOAD CELLS 6 is B with the angle of slideway 5 material line of travel of weighing, 0 ° of < B <, 90 ° or 90 ° < B < 180 °.Weigh slideway 5 rear end with rejecting platform front end dock and leave gap.

Slideway 5 of weighing be one with material surface of contact be smooth groove, groove surface axis and horizontal plane angle be A(0 ° of < A < 90 °) the rigid slideway of inclination, or for smooth flat, smooth flat and horizontal plane angle are A(0 ° of < A < 90 °) the rigid slideway of inclination, or be smooth socket, smooth tube axis and horizontal plane angle be A(0 ° of < A < 90 °) the rigid slideway of inclination.

Rejecting platform is reject slideway 8.Rejecting slideway 8 is the smooth rigid planes made with hard wear-resistant material, and material inlet end both sides are provided with striker plate.Object prevents material side to skidding off, especially for rejecting sliding material direction, the material road layout inconsistent on downward projection face with slideway material direction of weighing.Generally, the material movement direction length of tilted-putted rejecting slideway 8 be weigh slideway 5 1-6 doubly.

Also be provided with the first bracing frame 11; First bracing frame 11 is provided with material loading feeder 1 and is electrically connected electrical control gear 16; At material loading feeder 1 and weigh between slideway 5 and be provided with feeding slideway 3.

Also be provided with the second bracing frame 12; Second bracing frame 12 is provided with tilted-putted feeding slideway 3; The feeding end of feeding slideway 3 docks with material loading feeder 1 discharge end and leaves gap, and the feeding end of feeding slideway 3 is lower than material loading feeder 1; The discharge end of feeding slideway 3 is higher than slideway 5 feeding end of weighing, and feeding slideway 3 is parallel with slideway 5 of weighing, and feeding slideway 3 discharge end docks with the feeding end of slideway 5 of weighing and leaves gap.

Axis, feeding slideway 3 bottom surface is same straight line with axis, slideway 5 bottom surface of weighing; Its projection on material planing bottom can have different cross section profile, and as funnel-form, horn-like, the cross section profile of feeding slideway 3 is consistent with the cross section profile of slideway 5 of weighing at discharging opening.

Feeding slideway 3 is that make with hard wear-resistant material with rigid body that is material surface in contact unusual light, and slideway 5 of weighing adopts same material, same lubricant method.

First bracing frame 11, second bracing frame 12, the 3rd bracing frame 13, the 4th bracing frame 14 are independently; Or first bracing frame 11 and the second bracing frame 12 be integrated, the 3rd bracing frame 13 is independent, and the 4th bracing frame 14 is independent; Or first bracing frame 11 and the second bracing frame 12, the 3rd bracing frame 13 be integrated, the 4th bracing frame 14 is independent; Or first bracing frame 11 and second support 12 framves, the 3rd bracing frame 13, the 4th bracing frame 14 be integrated; Or first bracing frame 11 independent, the second bracing frame 12 and the 3rd bracing frame 13 in one, the 4th bracing frame 14 independence; Or first bracing frame 11 and the second bracing frame 12, the 4th bracing frame 14 be integrated, the 3rd bracing frame 13 is independent; Or first bracing frame 11 and the second bracing frame 12, the 4th bracing frame 14 be integrated, the 3rd bracing frame 13 is independent; Or first bracing frame 11 and the 4th bracing frame 14 one, the second bracing frame 12 is independent, the 3rd bracing frame 13 is independent; Or first bracing frame 11 independent, the second bracing frame 12 and the 4th bracing frame 14 are integrated, the 3rd bracing frame 13 independence.All bracing frames are all rigidity, and its absolute position and relative position do not move because material movement passes through.

The plane vertical with the design Impact direction of LOAD CELLS 6 and horizontal plane angle are D, 0 °≤D≤≤ 90 °.The scheme of weighing precision the best is: A+B=D+90 °.

Reject the material line of travel of platform, can be parallel with the material line of travel of slideway 5 of weighing; Can with plane-parallel; Also angle C can be had with level; Can also be inconsistent with the material direction of weighing on slideway 5 on downward projection face.

Also comprise the Weighing control instrument 15 be electrically connected with LOAD CELLS 6; Respectively with the electrical control gear 16 of rejecting classification mechanism 9, Weighing control instrument 15 is electrically connected.

Feeding slideway 3 can with slideway 5 different length of weighing.For hard ware material, the distance sum that when its length is greater than length and the material loading of the most length direction of material and slideway contacting surface, material aloft flies over; For soft material, its length is greater than 0.6 times of distance sum of flying over material during material loading of the length of the most length direction of material and slideway contacting surface aloft.

Slideway 5 of weighing can cover the lubricant such as grease, hairbrush with material contact portion.

Slideway 5 of weighing should be greater than 1.3 times of material longest dimension along material line of travel length.

Material loading feeder 1 horizontal positioned, its diameter of cylinder is 30mm, and its belt plane is than feeding slideway 3 material loading end height 10mm, and cylinder distance feeding slideway 3 is 2mm.Feeding slideway 3, weigh slideway 5 and reject slideway 8 all tilt successively parallel relatively, all horizontal by 30 ° of angles, be same material, discharging opening each other exceeds 1mm than charging aperture in the vertical direction with material line of travel, and parallel direction is 1mm apart.

The present embodiment test material 10 for actual weight be the in-built bulk cargo of 100 ± 0.01g soft packaging bag, be of a size of 130mm × 60mm, catercorner length is 143mm, and material 10 is 0.3 to the coefficientoffrictionμ of 304 mirror face stainless steels.Due to μ=0.3, tg30 °=0.58, μ < tg30 °, from physics general knowledge, straight feeding speed υ > 0 can ensure that material 10 slips over feeding slideway 3 by self speed and potential energy, weigh slideway 5 and rejecting slideway 8.

Feeding slideway 3 is made with the thick 304 mirror face stainless steel bendings of 2mm, bottom surface is wide 190mm, along the long 400mm(of material line of travel containing the para-curve projected length on feeding slideway 3 of material 10 when horizontal material loading feeder 1 is dished out) rectangle, the shelves limit height trough body structure that is 20mm, heavily about 1.6kg, current manufacturing cost is about 80 yuans, is arranged on the second bracing frame 12.

1.3 times of principles of the most length direction of material 10 are greater than by metering table top material 10 direction of motion length, slideway 5 of weighing is made with the thick 304 mirror face stainless steel bendings of 2mm, shape is the wide 200mm in bottom surface long 250mm(material line of travel) rectangle, rib height be the trough body structure of 20mm, heavily about 1kg, manufacturing cost is about 50 yuans.

Make with thick 304 mirror face stainless steels of 2mm again and reject slideway 8, its upper table surface is wide 220mm long 1500mm(material line of travel) rectangular planes, heavily about 6kg, manufacturing cost is about 300 yuans, 2 pneumatic rejecting classification mechanisms 9 and 2 photoelectric detection systems 4 are installed in its side, opposite side installs 2 material-receiving devices 17, and a material-receiving device 17 is installed in rear end, is all arranged on the 4th bracing frame 14.

Feeding slideway 3, weigh slideway 5 and rejecting slideway 8, manufacturing cost is about 430 yuans altogether.

Material loading feeder 1 is arranged on the first bracing frame 11,60 materials 10 per minute, and belt speed is 30 ms/min, and its discharge hole for discharge direction keeps level, closely arranges feeding slideway 3 below it.

Weigh slideway 5 cell body under Middle face be rigidly connected by the upper surface of bolt and force-guided stem 34, force-guided stem 34 upper surface and its bottom surface angle 10 °, force-guided stem 34 is made up of 304 stainless steels, the long 130mm of aluminum PW2D(, wide 25mm, the high 15mm of the 7.2kg range that force-guided stem 34 produces below by bolt and German HBM company, deadweight 250g) bearing end of single point weighing cell 6 is rigidly connected; LOAD CELLS 6(or force snesor) stiff end is rigidly connected by the mounting plane of bolt and the 3rd bracing frame 13, this installed surface and horizontal sextant angle 20 °, and material line of travel and the level of the slideway 5 that ensures during installation to weigh are 30 ° of angles.3rd bracing frame 13 keeps static at weighing process; Photoelectric detection system 4 is arranged on the 3rd bracing frame 13.

Feeding slideway 3 is rigidly connected to the second bracing frame 12, slideway 5 is parallel with weighing for length direction (i.e. 400mm edge direction), also be 30 ° of angles with level, its discharging opening is parallel relative with the charging aperture of slideway 5 of weighing, discharging opening should exceed 1mm than the charging aperture upper end of slideway 5 of weighing in the vertical direction with material line of travel, and parallel direction is at a distance of 1mm.

LOAD CELLS 6 is electrically connected Weighing control instrument 15 with photoelectric detection system 4, and the weight electric signal of the material 10 that LOAD CELLS 6 is experienced processes through Weighing control instrument 15 and shows numerical value, and Weighing control instrument 15 gives electrical control gear 16 gravimetric value; Electrical control gear 16 controls rejecting classification mechanism 9 at different levels through time delay and is let pass to this material 10 or reject classification.Electrical control gear 16 respectively with material loading feeder 1, reject classification mechanism 9, Weighing control instrument 15 is connected, its controls the belt speed of material loading feeder 1.

Weighing control instrument 15 selects the PLAC-5000 instrument of Shandong Cytyc Corp., and all bracing frames are weldment, and there is foot bolt at counterpoise 40kg(such as scene, and bracing frame can significantly loss of weight; Also the first bracing frame 11, second bracing frame 12, the 4th bracing frame 14 can be linked to be an entirety, also the first bracing frame 11, second bracing frame 12, the 3rd bracing frame 13 can be linked to be an entirety).During test, first carry out static demarcating with the symmetrical heavy slideway 5 of standard weight, then carry out dynamic corrections with actual the sliding of material 10.Just can be used for the weight grading of material 10 afterwards.

Result is as follows: be the soft packaging bag of the in-built bulk cargo of 100 ± 0.01g by actual weight, as material 10, the standard deviation of the 20 bag continuous weightings of this programme is 0.16g, peak-to-peak value error is 0.50g.

The go-on-go scale of contrast prior art, its primary structure is: material loading feeder 1, power belt 18 and power belt device for eliminating 7, all horizontally disposed.Same check weighing test is done: adopt the material loading feeder 1 same with inclined ramp checking weight weigh, and grading plant 7 rejected by the belt of routine with it.Metering units adopts same PLAC-5000 Weighing control instrument and digital filter program, same HBM LOAD CELLS, Haber Si company of Switzerland belt, Japan Oriental company brshless DC motor, and the U.S. produces Timing Belt, 2 cylinders crossed through dynamic balance treatment, general-purpose balance body structures; Same static demarcating and dynamic test correction.The manufacturing cost such as motor, belt, cylinder, scale body of metering units is about 4800 yuans.The manufacturing cost such as motor, belt, cylinder, table top that level rejects belt is about 3800 yuans.During test, by actual weight be the soft packaging bag of the in-built bulk cargo of 100 ± 0.01g as material 10, its best result is standard deviation is that 0.25g, peak-to-peak value error are at 0.79g.The actual precision rejecting classification depends on dynamic weighing precision completely, and the control of rejecting classification mechanism 9 is known technologies.

Visible, adopt this programme of rejecting slideway 8, its dynamic weighing ratio of precision prior art significantly improves: standard deviation reduction by 36%, peak-to-peak value error-reduction 37%; Weighing platform and the manufacturing cost rejecting platform are only original 5%; Use cost also will significantly reduce; Significantly can also improve that it is dust-proof, waterproof, the healthy prevention grade.

embodiment 2:

The present embodiment and embodiment 1 are that something in common repeats no more, and difference is that rejecting platform is common motive power belt.Common motive power belt is adopted to replace the power belt needing synchro control to reject grading plant.

As shown in fig. 6-7, reject grading plant 7 and change level rejecting power belt into, the power belt (band conveyor as Shanghai Ying Sheng Machinery Co., Ltd. product) of electric control project adopt ordinary skill requires on market drive motor, belt, cylinder, not having linear velocity synchro control to require, total price is 2200 yuans, and on its belt, plane is placed in the 20mm place, below of slideway 5 of weighing.All machinery, installation and electrical connection are also substantially the same, and too, just electrical control gear 16 also will control the rotating speed that power belt rejects grading plant 7 for weighing instrument 15 and electrical control gear 16.Horizontal material loading feeder 1 is also 60 materials 10 per minute, and belt speed is 30 ms/min.

With with the duplicate actual weight of embodiment 1 be the in-built bulk cargo of 100 ± 0.01g soft packaging bag, as material 10, the standard deviation of the 20 bag continuous weightings of the present embodiment is 0.18g, peak-to-peak value error is 0.54g.Visible, adopt this programme of common motive power belt, its dynamic weighing ratio of precision prior art significantly improves: standard deviation reduction by 28%, peak-to-peak value error-reduction 32%; Total manufacturing cost of weighing platform and common rejecting power belt is only original 58%, and use cost also will significantly reduce.

Claims (8)

1. a slideway checking weight weigh of weighing, it comprises the 3rd bracing frame and the 4th bracing frame, and the 3rd bracing frame is provided with LOAD CELLS, and LOAD CELLS is provided with tilted-putted slideway of weighing; 4th bracing frame is provided with and rejects platform and reject classification mechanism; Rejecting platform is placed in below the discharging opening of slideway of weighing; Slideway of weighing is rigidly connected by force-guided stem and LOAD CELLS force side, and the design Impact direction of LOAD CELLS is B with the angle of slideway material line of travel of weighing, 0 ° of < B <, 90 ° or 90 ° < B < 180 °; Weigh slideway rear end with rejecting platform front end dock and leave gap; Rejecting platform is reject slideway.

2. the slideway according to claim 1 checking weight weigh of weighing, the slideway that it is characterized in that weighing is smooth groove with material surface of contact, groove surface axis and horizontal plane angle are A, the rigid slideway of the inclination of 0 ° of < A < 90 °; Or slideway of weighing is smooth flat with material surface of contact, and smooth flat and horizontal plane angle are A, the rigid slideway of the inclination of 0 ° of < A < 90 °; Or slideway of weighing is is smooth socket with material surface of contact, smooth tube axis and horizontal plane angle are A, the rigid slideway of the inclination of 0 ° of < A < 90 °.

3. the slideway according to claim 1 checking weight weigh of weighing, is characterized in that rejecting slideway is the smooth rigid plane made with hard wear-resistant material, is provided with striker plate in material inlet end both sides.

4. the slideway according to claim 1 checking weight weigh of weighing, is characterized in that also being provided with the first bracing frame; First bracing frame is provided with material loading feeder and is electrically connected electrical control gear; At material loading feeder and weigh between slideway and be provided with feeding slideway.

5. the checking weight weigh that the slideway according to claim 1 or 4 is weighed, is characterized in that also being provided with the second bracing frame; Second bracing frame is provided with tilted-putted feeding slideway; The feeding end of feeding slideway docks with material loading feeder discharge end and leaves gap, and the feeding end of feeding slideway is lower than material loading feeder; The discharge end of feeding slideway is higher than slideway feeding end of weighing, and feeding slideway is parallel with slideway of weighing, and feeding slideway discharge end docks with the feeding end of slideway of weighing and leaves gap.

6. the slideway according to claim 4 checking weight weigh of weighing, is characterized in that axis, feeding slideway bottom surface is same straight line with axis, slideway bottom surface of weighing; The cross section profile of feeding slideway is consistent with the cross section profile of slideway of weighing at discharging opening.

7. the slideway according to claim 4 checking weight weigh of weighing, it is characterized in that feeding slideway is that make with hard wear-resistant material with rigid body that is material surface in contact unusual light, and slideway of weighing adopts same material, same lubricant method.

8. the slideway according to claim 1 checking weight weigh of weighing, is characterized in that the plane vertical with the design Impact direction of LOAD CELLS and horizontal plane angle are D, 0 °≤D≤90 °.