CN101706314A

CN101706314A - Upright feeding hopper-free powder quantification scale

Info

Publication number: CN101706314A
Application number: CN200910234537A
Authority: CN
Inventors: 张晓传
Original assignee: WUXI NAITE ELECTROMECHANICAL INTEGRATING TECHNOLOGY Co Ltd
Current assignee: WUXI NAITE ELECTROMECHANICAL INTEGRATING TECHNOLOGY Co Ltd
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2010-05-12
Anticipated expiration: 2029-11-20
Also published as: CN101706314B

Abstract

The invention discloses a gravity type automatic loading weighing device which is an upright feeding hopper-free powder quantification scale which comprises a rack, a material bin, a screw feeder, a discharge pipe, a material receiving nozzle, a power shaft and a motor which is connected with the power shaft, wherein the material bin is vertically arranged on the rack, the lower end of the material bin is connected with the upper end of the discharge pipe, the screw feeder penetrates through the material bin and the discharge pipe, the upper end of the screw feeder is connected with the lower end of the power shaft, the lower end of the screw feeder is close to a discharge port of the discharge pipe, the material receiving nozzle is arranged at the periphery of the discharge port of the discharge pipe, the periphery of the lower end of the material receiving nozzle is provided with a bag clip, an air cylinder is connected on the bag clip, a first supporting component and a second supporting component are respectively arranged on the machine frame, a transmission box body is arranged at the upper part of the material bin by the first supporting component and the second supporting component, a speed reducer is arranged in the transmission box body, an installation plate is arranged on the rack, a sensor is arranged on the installation plate and is connected with a steel plate, the steel plate is connected with the material receiving nozzle, and the bag clip is hinged on the material receiving nozzle. After upright feeding is adopted, the weighing is accurate, the volume is small, the structure is compact, and the motion of the feeder is smooth.

Description

Upright feeding hopper-free powder quantification scale

Technical field

The present invention relates to a kind of gravity type automatic charge weighing apparatus.

Background technology

In the powder batch scale of the existing little range in market, mostly adopt the volumetric method weighing, just utilize step motor control screw feeder rotating cycle, the volume of calculating powder according to the number of turns that screw feeder changeed and pitch, thereby calculate its weight, such weighing technique velocity ratio is very fast, but precision is not very accurate, because in the process of whole manufacturing and installation, can produce error unavoidably, so precision is not high,, just be difficult to satisfy to the accuracy requirement high user.Also adopted horizontal feed-type, just screw feeder is placed sidewards, and it must be separate adopting the feed bin of horizontal feed-type and charging casing, just also can increase the volume of scale body; In addition, if screw feeder adopts an end to fix, be exactly cantilever beam structure, the time has been grown the screw feeder easy deformation, will collide with the inner arm of discharge nozzle or stuck phenomenon occurs; If adopt two ends to fix, then need increase the strong point at the other end, will increase parts, increased the volume of scale simultaneously; So adopt the volume of horizontal feed-type bigger, cost is higher.

Summary of the invention

Technical matters to be solved by this invention provides that a kind of weighing is accurate, volume is little, compact conformation, dispenser move upright feeding hopper-free powder quantification scale smoothly.

Technical scheme of the present invention is:

A kind of upright feeding hopper-free powder quantification scale, comprise frame, feed bin, screw feeder, discharge nozzle, mouth connects material, line shaft, the motor that is connected with line shaft, described feed bin is vertically set on the frame, the lower end of feed bin connects the upper end of discharge nozzle, described screw feeder passes feed bin and discharge nozzle, the upper end is connected with the lower end of line shaft, the lower end of screw feeder is near the discharging opening of discharge nozzle, the mouth that connects material is arranged on around the discharging opening of discharge nozzle, be provided with sackholder around the described mouth lower end that connects material, connect cylinder on the sackholder, be respectively arranged with first support member and second support member on the described frame, transmission case body is arranged on the top of feed bin by first support member and second support member, and reductor places in the transmission case body, and installing plate is set on the frame, installing plate is provided with sensor, sensor is connected with steel plate, and steel plate is connected with the mouth that connects material, and sackholder is articulated on the mouth that connects material.

The upper end of screw feeder is connected by shaft coupling with the lower end of line shaft, and the upper end of line shaft is passed transmission case body and connected motor.

The outer ring of line shaft is provided with shaft, and described shaft is connected with stirrer.

The lower end of discharge nozzle is provided with block, is provided with screen cloth between the lower end of described discharge nozzle and the block.

Described mouth and the sackholder of connecting material is all by sensor support.

Beneficial effect: adopt after the vertical feed, feed bin is direct with being threaded with discharge nozzle, has saved the charging casing; Because the mode that screw feeder adopts an end to hang, the other end need not be fixed, so can save the parts of support end again; Therefore scale is no scale bucket structure again, so save the shared space of scale bucket parts again; So volume reduces greatly. the precision of weighing has also improved, adopted volumetric method to come weighing in the past, because stepper motor, the situation in step appears losing in actual use once in a while, and in the process of manufacturing screw feeder and discharge nozzle, can produce error unavoidably, so cause the not high phenomenon of weighing precision. adopt LOAD CELLS to come weighing now, precision will improve greatly, because LOAD CELLS sensitivity, precision are all above the weighing precision requirement, precision is considerably beyond the precision of volume weighing method.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the left view of Fig. 1.

Among the above figure:

1---frame, 2---travel switch, 3---outer cover |, 4---feed bin, 5---following level detector, 6---snubber block, 7---first support member, 8---the feed bin lid, 9---transmission case body, 10---flange, 11---reductor, 12---motor, 13---the V-belt, 14---interface, 15---go up level detector, 16---switch board, 17---second support member, 18---reductor, 19---driving gear, 20---second motor, 21---shaft coupling, 22---follower gear, 23---clutch shaft bearing, 24---bearing seat, 25---second bearing, 26---locating sleeve |, 27---shaft, 29---stirrer, 30---shaft coupling, 31---first joint, 32---screw feeder, 33---second joint, 34---the 3rd joint, 35---set nut, 36---discharge nozzle, 37---block, 38---cylinder, 39---mouth connects material, 40---steel plate, 41---sackholder, 42---sensor, 43---installing plate, 44---line shaft.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

A kind of upright feeding hopper-free powder quantification scale, comprise frame 1, feed bin 4, screw feeder 32, discharge nozzle 36, mouth 39 connects material, line shaft 44, the motor 12 that is connected with line shaft 44, feed bin 4 is vertically set on the frame 1, the lower end of feed bin 4 connects the upper end of discharge nozzle 36, described screw feeder 32 passes feed bin 4 and discharge nozzle 36, the upper end is connected with the lower end of line shaft 44, the lower end of screw feeder 32 is near the discharging opening of discharge nozzle 36, the mouth 39 that connects material is arranged on around the discharging opening of discharge nozzle 36, connect material and be provided with sackholder 41 around mouth 39 lower ends, connect cylinder 38 on the sackholder 41, be respectively arranged with first support member 7 and second support member 17 on the described frame 1, transmission case body 9 is arranged on the top of feed bin 4 by first support member 7 and second support member 17, and reductor 18 places in the transmission case body 9, and frame 1 is provided with installing plate (43, installing plate 43 is provided with sensor 42, sensor 42 is connected with steel plate 40, and steel plate 40 is connected with the mouth 39 that connects material, and sackholder 41 is articulated on the mouth 39 that connects material.

The lower end of the upper end of screw feeder 32 and line shaft 44 is connected by shaft coupling 30, and the upper end of line shaft 44 is passed transmission case body 9 and connected motor 12, and motor 12 is a variable-frequency motor.

The outer ring of line shaft 44 is provided with shaft 27, and described shaft 27 is connected with stirrer 29.

The lower end of discharge nozzle 36 is provided with block 37.

The lower end of discharge nozzle 36 and block a shot and be provided with screen cloth between 37.

Described mouth 39 and the sackholder 41 of connecting material all supported by sensor 42.

Feed bin 4 is loaded on the frame by three lugs on every side, and is lined with snubber block 6 between lug and frame; Second bearing 25, locating sleeve 26 is respectively charged in the bearing seat 24, shaft 27 is packed in second bearing, 25 holes, clutch shaft bearing 23 be respectively charged in follower gear 22 holes with shaft 27 holes in, follower gear 22 is loaded on shaft 27 end faces, line shaft 44 is packed in clutch shaft bearing 23 holes, feed bin lid 8 is placed on the shaft 27, interface 14 is welded as a whole in the feed bin lid, stirrer 29 by screw retention on shaft 27, stirrer 29 is welded by round steel and circular cover, be welded with four claws above, because the claw front end is semicircle, can regulate length. shaft coupling 30 is hinged with line shaft 44, shaft coupling 30 is hinged by first joint 31 with screw feeder 32, bearing seat 24 is loaded on the transmission case body base plate, reductor 18 is loaded on the transmission case body base plate, driving gear 19 is loaded on reductor 18 output shafts, and make it to be meshed in follower gear 22, second motor 20, reductor 11, motor 12 is loaded on respectively on transmission case body 9 top boards, belt pulley is loaded on second motor 20 respectively, on 18 of reductors, again V-belt 13 is loaded on the belt wheel, with first support member 7 and second support member 17 with case supports on frame.

Second joint 33 is welded as a whole with feed bin 4, the 3rd joint 34 and second joint 33 are spirally connected, discharge nozzle 36 and the 3rd joint 34 are spirally connected, set nut 35 is used to lock discharge nozzle 36, block 37 is connected with ear on the discharge nozzle 36 by bolt, between discharge nozzle 36 and block 37, a screen cloth is arranged, to prevent that material from freely falling, cylinder 38 1 ends are hinged with the ear on the mouth 39 that connects material, one end and sackholder 41 are hinged, connecting material on the mouth 39 is welded as a whole with steel plate 40, steel plate 40 by bolt on sensor 42, sensor 42 by bolt on installing plate 43.

Screw feeder 32 is covered with outer cover 3, and outer cover 3 is connected on the feed bin 4 by second joint 33.

Earlier packaging bag is placed in mouth 39 lower ends that connect material, touch travel switch 2, cylinder 38 promotes sackholder 41 and clamps packaging bag, after cylinder 38 actions put in place, magnetic switch on the cylinder 38 just sends signal, single-chip microcomputer just sends signal after receiving signal, allows motor 12 work, and motor 12 is variable-frequency motors, two frequency of operation are arranged, begin to be high-frequency, speed is very fast, just thick feed, when the weight of packaging bag the inside reaches the weight of thick feeding point, single-chip microcomputer sends signal, makes motor 12 switch to the low frequency operation mode, and be thin feed this moment, when weight reaches the target packed weight, single-chip microcomputer sends signal, and motor 12 just quits work, slightly time-delay is arranged after, cylinder 38 withdrawals, sackholder 41 unclamps packaging bag, and packaging bag falls automatically, has promptly finished a weighing cycle.

Need to prove: second motor 20 slightly to the time work because during thick feed, screw feeder 32 pushes very fast, if untimely stirring, powder all around not necessarily automatically landing get off, might cause under feeding, cause feed inhomogeneous, influence weighing precision; When thick feed finished, second motor 20 also quit work.Level detector 15 and following level detector 5 also are housed on the feed bin 4 in addition, can provide feed and stop signal for screw feeder 32.

Claims

1. upright feeding hopper-free powder quantification scale, comprise frame (1), feed bin (4), screw feeder (32), discharge nozzle (36), mouth (39) connects material, line shaft (44), the motor (12) that is connected with line shaft (44), it is characterized in that: described feed bin (4) is vertically set on the frame (1), the lower end of feed bin (4) connects the upper end of discharge nozzle (36), described screw feeder (32) passes feed bin (4) and discharge nozzle (36), the upper end is connected with the lower end of line shaft (44), the lower end of screw feeder (32) is near the discharging opening of discharge nozzle (36), the mouth (39) that connects material is arranged on around the discharging opening of discharge nozzle (36), be provided with sackholder (41) around the described mouth that connects material (39) lower end, sackholder (41) is gone up and is connected cylinder (38), be respectively arranged with first support member (7) and second support member (17) on the described frame (1), transmission case body (9) is arranged on the top of feed bin (4) by first support member (7) and second support member (17), reductor (18) places in the transmission case body (9), installing plate (43) is set on the frame (1), installing plate (43) is provided with sensor (42), sensor (42) is connected with steel plate (40), steel plate (40) is connected with the mouth that connects material (39), and sackholder (41) is articulated on the mouth that connects material (39).

2. upright feeding hopper-free powder quantification scale according to claim 2, it is characterized in that: the lower end of the upper end of described screw feeder (32) and line shaft (44) is connected by shaft coupling (30), and the upper end of line shaft (44) is passed transmission case body (9) and connected motor (12).

3. upright feeding hopper-free powder quantification scale according to claim 1 is characterized in that: the outer ring of described line shaft (44) is provided with shaft (27), and described shaft (27) is connected with stirrer (29).

4. upright feeding hopper-free powder quantification scale according to claim 1 is characterized in that: the lower end of described discharge nozzle (36) is provided with block (37).

5. upright feeding hopper-free powder quantification scale according to claim 1 is characterized in that: be provided with screen cloth between the lower end of described discharge nozzle (36) and the block (37).

6. upright feeding hopper-free powder quantification scale according to claim 1 is characterized in that: described mouth that connects material (39) and sackholder (41) are all supported by sensor (42).