CN208206256U

CN208206256U - automatic weighing device

Info

Publication number: CN208206256U
Application number: CN201820695708.7U
Authority: CN
Inventors: 陈国华
Original assignee: Ningbo Delong Weighing Apparatus Technology Co Ltd
Current assignee: Ningbo Delong Weighing Apparatus Technology Co Ltd
Priority date: 2018-05-10
Filing date: 2018-05-10
Publication date: 2018-12-07
Anticipated expiration: 2028-05-10

Abstract

The utility model discloses a kind of automatic weighing device, including conveying frame, scale frame, logical carrying rollers for being used to support belt for passing through axis and being arranged successively with several in conveying frame；Scale frame is located at below each carrying roller, scale frame right end passes through axis connection with logical, it is logical to pass through axis and conveying frame rotation connection, scale frame left end is equipped with gravity sensor, gravity sensor is contacted with the first fixed stringer upper surface being set in conveying frame, and the conveying frame of the first fixed cross beam left part is equipped with the second fixed stringer.The utility model has the characteristics that weighing accuracy is good.

Description

Automatic weighing device

Technical field

The utility model relates to weighing-appliance technical fields, fill more particularly, to a kind of automatic weighing that weighing accuracy is high It sets.

Background technique

Weighing belt basic functional principle is the quality signal of the material passed through by weighing sensor perception, is passed in conjunction with speed The belt line speed signal of sensor perception, calculates two signals by integrating instrument, finally obtains the object for flowing through weighing belt Expect quality, on this basis, carry on trade clearing, is mainly used in the fields such as harbour, power plant, mixing plant, every profession and trade ingredient, is The indispensable measuring equipment of national economy.

The weighing structure of the weighing belt of the prior art be trunnion type structure, self-aligning bearing, in material unbalance loading, entirely Scale frame has the tendency that Automatic-searching center of rotation, and scale frame is caused to tilt, inconsistent with state when initial alignment, has been equivalent to zero point Through becoming, the accuracy of weighing not can guarantee.Weighing sensor stress also has angle with vertical direction, cannot reflect reality completely Border material moment flows through quality.There are also a kind of production methods of low cost: interconnection sheet mode is used, because not can guarantee rotation When it is complete with one heart, there are serious internal force interference problems；In addition there are also a kind of " full suspension type " structure, torque and interior is solved Power interference problem, but there are scale frame " integral shift " hidden danger, will lead to weighing belt stress with frictional force and belt tension variation and Continually changing situation, accurate qualitative data cannot be obtained by also resulting in weighing sensor.

Summary of the invention

The purpose of the invention of the present invention is to overcome weighing belt in the prior art not can guarantee weighing accuracy Deficiency provides a kind of automatic weighing device that weighing accuracy is high.

To achieve the goals above, the utility model uses following technical scheme:

A kind of automatic weighing device, including conveying frame, scale frame, logical in conveying frame pass through axis and several successively The carrying roller for being used to support belt of arrangement；Scale frame is located at below each carrying roller, scale frame right end and it is logical pass through axis connection, it is logical pass through axis with it is defeated Gantry rotation is sent to connect, scale frame left end is equipped with weighing sensor, and weighing sensor and first in conveying frame are fixed vertical The contact of beam upper surface, the conveying frame of the first fixed cross beam left part are equipped with the second fixed stringer, and the second fixed stringer is equipped with For detecting the velocity pick-up mechanism of belt linear velocity, carrying roller corresponding with scale frame quantity >=4.Belt is connect with spool, volume Axis is connected to motor.

Flow of Goods and Materials ideally makes weighing sensor stress equalization, normal；Material unbalance loading will lead to weighing and sensing Device stress resultant force has angle with vertical direction, is unable to the quality that accurate response practical material moment flows through.

The utility model is set about from the angle of reasonable stress, from the mechanical structure of most original, thoroughly changes previous skin Belt scale weighing sensor force way, keeps stress more accurate, and then the accuracy class of belt elevator scale.

And change previous weighing belt and resist tension variation and the weaker situation of belt deviation ability, enable Novel waistband scale Enough in the case where operating condition is relatively more severe, high-precision weighing data is obtained.

The utility model, using monoblock type anti-bias load, high intensity, leads in >=4 carrying roller and passes through axis, without interference stress type Scale frame, that is, more carrying rollers, high-intensitive scale frame, because carrying roller spacing is small, sag of belt degree is small, so when tension variation, to skin The influence of belt scale also just small, monoblock type scale frame, solves the situation that force-transmitting ring section is more, interference is more, and make sensor perception is True quality of material changes the case where previous weighing belt can only be manufactured by idler for belt conveyer spacing.

Using single cantilever beam type sensor, single-point type force way, stress condition is reacted strictly according to the facts, is changed and is used 1 in the past Only or two S type tension load cells compensate the way that Impact direction changes, and also change (complete to suspend using 2 or more Formula scale frame) the sensor situation that needs to level each force acting on transducer, in fact, when more sensors need to level, knot The problem of fruit is error size, error always exist, and it is completely the same to be unable to reach stress.

When material section shape is uneven or belt deviation leads to force acting on transducer unevenness, the basic nothing of original leveling coefficient Method actual response material unbalance loading situation causes weighing inaccurate；

Contact using the velocity sensor of spring damping formula with belt reflects belt linear velocity, in all perception strictly according to the facts In the mode of belt speed, the physical contact of Purely mechanical is the most reliable way of contact, and contact perception generally passes speed Sensor, which is fixed on, to be rewinded, and rewinding all for belt conveyor has the case where belt bounce, it is possible to make velocity sensor The case where in the presence of throwing switch, is to be fixed on sensor to rewind on roller using Hall switch mode, occurs between roller and belt Situations such as skidding, can not reflect belt linear velocity, most effective way or mechanical contact strictly according to the facts, as long as contact is reliable, line Speed issue is just readily solved, therefore the innovation has added spring, when belt bounce drives velocity sensor bounce, because of spring damping Effect, enables the rotating wheel of velocity sensor to be close to belt always, even if belt is wet and slippery, does not also influence at all to perceive belt Linear velocity；To reach the requirement of the accurate transmission speed signal；

It is logical to pass through shaft design:

It is logical to pass through an axis i.e. bearing, previous other designs are revolutionized using modes such as semiaxis, trunnion, cross connect sheets The power interference problem of generation also changes " full suspension type " scale frame structure because scale frame global displacement leads to weighing belt Zero change Problem.This logical bearing passed through in fixed bearing block used by axis does not also use self-aligning bearing, and self-aligning bearing is able to solve axis certainly Dynamic the problem of looking for the heart, reducing interference, but during automatic aligning, rotation of the scale frame on cross section is resulted in, this The accurate transmission influence for power is great.The zero point for being equivalent to scale is varied, not can guarantee the accuracy of weighing.

Design of center line and the force acting on transducer point of rotation axis in same level:

Weighing sensor precision itself is generally C3 grades, applies and is fully able to meet the requirements on weighing belt, and cantilever beam passes Force request of sensor itself is horizontal, direction is vertical, and it is accurate to can be only achieved stress in this way；

It logical will pass through axis and be set as X-axis, scale frame rotates around X-axis, most reasonable stress point are as follows: horizontal direction passes through X-axis axis The line of the heart, on the arbitrary point vertical with this line of direction, and the stress point of the weighing sensor of the utility model and the center of X-axis exist In one horizontal plane, to guarantee that the stress of sensor is perpendicular to horizontal direction.Because belonging to high-intensitive scale frame, pass through mechanics Analysis, when maximum material passes through, the deflection deformation of scale frame is within 0.1mm, in the angular deformation of force acting on transducer point It ignores, is equal to vertical stress.

So no matter belt conveyor is flat rubber belting or gradient band, guarantee rotation axis axle center and force acting on transducer point same It is key in horizontal plane, for different conveyer angles, making various sizes of bearing block be can be solved.

Preferably, it is described it is logical to pass through axis include shaft, be respectively arranged on two bearing blocks of both ends of the shaft, and be set in shaft Two hangers components, two hangers components are respectively close to two bearing blocks；

Preferably, conveying frame includes two crossbeams extended in parallel, two bearing blocks are connect with two crossbeams respectively, Two hangers components are fixedly connected with scale frame right end.

Preferably, the hangers component includes the annulus being fixedly connected with shaft, and the draw-bar guide connecting with annulus.

Preferably, the carrying roller includes two supporting elements being separately connected with two crossbeams, it is set on two supporting elements Several successively hinged poles between end；The supporting element extends to the oblique upper on the inside of scale frame, and each pole is successively hinged Height locating for the middle part of the structure constituted afterwards is lower than height locating for the supporting element upper end.

Preferably, the scale frame includes two cross bars and several vertical poles between two cross bars, left end Vertical pole is equipped with sensor support base, the lower surface connection of weighing sensor and sensor support base.

Preferably, velocity pick-up mechanism includes bracket and the black box that connect with holder pivots；Bracket includes and The linking arm of two fixed stringer connections, the attachment base being welded to connect with linking arm rear portion, the pressing plate being welded to connect with attachment base；It is whole Body component includes the velocity sensor extension arm being connect by rotation axis with linking arm front, with velocity sensor extension arm front The spring conductor rod of vertical welding connection and the velocity sensor being connect with velocity sensor extension arm front bolt fastening；Spring Guide rod top is stretched out from the pilot hole on pressing plate, and spring conductor rod is equipped with spring, and lower spring end and velocity sensor extend The contact of arm upper surface；The bracket and pressing plate gradually oliquely downward tilt from left to right.

Therefore, the utility model has the following beneficial effects: weighing accuracy and precision are high, while stability is increased, Improve service life.

Detailed description of the invention

Fig. 1 is a kind of top view of the utility model；

Fig. 2 is a kind of main view of the utility model；

Fig. 3 is a kind of top view of the scale frame of the utility model；

Fig. 4 is a kind of main view of the scale frame of the utility model；

Fig. 5 is a kind of logical structural schematic diagram for passing through axis of the utility model；

Fig. 6 is a kind of structural schematic diagram of the velocity pick-up mechanism of the utility model；

Fig. 7 is a kind of side view of the use of the new type.

In figure: conveying frame 1, scale frame 2, the logical fixed stringer 6, second of axis 3, carrying roller 4, weighing sensor 5, first that passes through are fixed Stringer 7, velocity pick-up mechanism 8, crossbeam 11, cross bar 21, vertical pole 22, sensor support base 23, shaft 31, bearing block 32, hangers group Part 33, supporting element 41, pole 42, linking arm 81, pressing plate 82, velocity sensor 83, spring 84, attachment base 85, spring conductor rod 86, velocity sensor extension arm 87, rotation axis 88, annulus 331, draw-bar guide 332.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and detailed description.

Embodiment as shown in Figure 1 and Figure 2 is a kind of automatic weighing device, including conveying frame 1, and scale frame 2 is set to conveying The logical carrying roller 4 for being used to support belt for passing through axis 3 and 7 and being arranged successively in rack；Scale frame is located at below each carrying roller, and scale frame is right Axis connection is passed through with logical in end, logical to pass through axis and conveying frame is rotatablely connected, and scale frame left end is equipped with weighing sensor 5, weighing sensor with The first fixed 6 upper surface of stringer contact in conveying frame, the conveying frame of the first fixed stringer left part are equipped with second Fixed stringer 7, the second fixed stringer is equipped with the velocity pick-up mechanism 8 for detecting belt linear velocity, corresponding with scale frame Carrying roller quantity is 7.

As shown in Figure 5, Figure 7, lead to that pass through axis include shaft 31, be respectively arranged on two bearings 32 of both ends of the shaft, and be set to and turn Two hangers components 33 on axis, two hangers components are respectively close to two bearings；Hangers component includes being fixedly connected with shaft Annulus 331, and the draw-bar guide 332 being connect with annulus.

As shown in Figure 1, conveying frame includes two crossbeams extended in parallel 11, two bearing blocks connect with two crossbeams respectively It connects, two hangers components are welded and fixed with scale frame right end and connect.

As shown in Figure 1, Figure 2, shown in Fig. 7, carrying roller includes two supporting elements 41 being separately connected with two crossbeams, is set to two branch 3 between support member upper end successively hinged poles 42；Supporting element extends to the oblique upper on the inside of scale frame, and each pole is successively hinged Height locating for the middle part of the structure constituted afterwards is lower than height locating for the supporting element upper end.

As shown in Figure 3, Figure 4, scale frame includes two cross bars 21 and 7 vertical poles 22 between two cross bars, left end Vertical pole be equipped with sensor support base 23, the lower surface of weighing sensor and sensor support base overlaps.

As shown in fig. 6, velocity pick-up mechanism includes bracket and the black box that connect with holder pivots；Bracket includes and The linking arm 81 of two fixed stringer connections, the attachment base 85 being welded to connect with linking arm rear portion, the pressure being welded to connect with attachment base Plate 82；Black box includes the velocity sensor extension arm 87 being connect by rotation axis 88 with linking arm front, with velocity pick-up The spring conductor rod 86 and connect with velocity sensor extension arm front bolt fastening that device extension arm forward vertical is welded to connect Velocity sensor 83；Spring conductor rod top is stretched out from the pilot hole on pressing plate, and spring conductor rod is equipped with spring 84, under spring End is contacted with velocity sensor extension arm upper surface；Bracket and pressing plate gradually oliquely downward tilt from left to right.

The application method of the utility model:

As shown in Figure 1, conveying frame includes two crossbeams extended in parallel, belt is under the drive of spool and motor from the right side It is moved to the left, at the location of velocity pick-up mechanism right end place, belt is first downwards then to right-hand rotation；

When there is material on belt, the quality signal for the material that weighing sensor perception passes through, in conjunction with velocity sensor sense The belt line speed signal known calculates two signals by integrating instrument, finally obtains the quality of material for flowing through weighing belt.

The logical axis that passes through that the utility model uses revolutionizes previous other designs using semiaxis, trunnion, cross connect sheet Etc. the power interference problem that generates of modes, the logical center line for passing through axis and weighing sensor stress point are in same level；

It logical will pass through axis and be set as X-axis, scale frame rotates around X-axis, and the stress point of weighing sensor and the center of X-axis are at one In horizontal plane, to guarantee that the stress of weighing sensor is perpendicular to horizontal direction, the title of the utility model is ensured that Weight accuracy and precision, while stability is increased, improve service life.

It should be understood that the present embodiment is merely to illustrate the utility model rather than limitation the scope of the utility model.Furthermore It should be understood that after reading the content taught by the present invention, those skilled in the art can make the utility model various Change or modification, these equivalent forms also fall within the scope of the appended claims of the present application.

Claims

1. a kind of automatic weighing device, characterized in that including conveying frame (1), scale frame (2), logical in conveying frame is passed through Axis (3) and several carrying rollers (4) for being used to support belt being arranged successively；Scale frame is located at below each carrying roller, scale frame right end with Logical to pass through axis connection, logical to pass through axis and conveying frame is rotatablely connected, scale frame left end is equipped with weighing sensor (5), weighing sensor with set It is contacted in the first fixed stringer (6) upper surface in conveying frame, the conveying frame of the first fixed stringer left part is equipped with second Fixed stringer (7), the second fixed stringer is equipped with the velocity pick-up mechanism (8) for detecting belt linear velocity, opposite with scale frame Carrying roller quantity >=4 answered.

2. automatic weighing device according to claim 1, characterized in that it is described it is logical to pass through axis include shaft (31), set respectively Two hangers components (33) in two bearing blocks (32) of both ends of the shaft, and in shaft, two hangers components lean on respectively Nearly two bearing blocks；

Conveying frame includes two crossbeams extended in parallel (11), and two bearing blocks are connect with two crossbeams respectively, two hangers Component is welded and fixed with scale frame right end and connect.

3. automatic weighing device according to claim 2, characterized in that the hangers component includes being fixedly connected with shaft Annulus (331), and the draw-bar guide (332) being connect with annulus.

4. automatic weighing device according to claim 2, characterized in that the carrying roller includes being separately connected with two crossbeams Two supporting elements (41), several successively hinged poles (42) between two supporting element upper ends；The supporting element to Oblique upper on the inside of scale frame extends, and height locating for the middle part of the structure constituted after each pole is successively hinged is lower than the support Height locating for part upper end.

5. automatic weighing device according to claim 1, characterized in that the scale frame includes two cross bars (21) and is set to The vertical pole of several vertical poles (22) between two cross bars, left end is equipped with sensor support base (23), weighing sensor and biography The lower surface of sensor support overlaps.

6. automatic weighing device described according to claim 1 or 2 or 3 or 4 or 5, characterized in that velocity pick-up mechanism includes branch Frame and the black box being connect with holder pivots；Bracket includes the linking arm (81) connecting with the second fixed stringer, with linking arm The attachment base (85) that rear portion is welded to connect, the pressing plate (82) being welded to connect with attachment base；Black box includes passing through rotation axis (88) the velocity sensor extension arm (87) connecting with linking arm front is welded to connect with velocity sensor extension arm forward vertical Spring conductor rod 86 and the velocity sensor 83 that is connect with velocity sensor extension arm front bolt fastening；On spring conductor rod Portion is stretched out from the pilot hole on pressing plate, and spring conductor rod is equipped with spring (84), on lower spring end and velocity sensor extension arm Surface contact；The bracket and pressing plate gradually oliquely downward tilt from left to right.