CN100486868C - Metering and separate loading machine for bulk material - Google Patents

Abstract

The bulk material metering and packing machine has high metering precision, high efficiency and low cost. The bulk material metering and packing machine of the present invention includes frame, material bin fixed onto the frame, and metering bin connected via weighing sensor to the frame; and features the initial metering bin set between the material bin and the metering bin and the vibrating material adder, which is installed on the frame and connected with the material bin to add material to the metering bin and comprises material adding bin and vibrator. The present invention fuses volumetric metering and weighing integrally, has initial metering bin for primary metering and vibrating metering weigher to obtain target weight fast, so that the present invention has high metering and packing speed, high work efficiency and high metering precision.

Description

Bulk material metering and dispensing machine

technical field

The invention belongs to a packaging machine, in particular to a bulk material metering and dispensing machine.

Background technique

Bulk material packing machines in the prior art are mainly divided into two types, one is a volumetric metering packing machine, and the other is a weighing type metering packing machine. The volumetric measuring packaging machine uses the container to measure the material, and the weighing type measuring packaging machine uses the weighing device to measure the material. According to the difference of the weighing device, it can be divided into mechanical lever type measuring packaging machine and gravity sensor type Metering packaging machine, weighing weighing packaging machine is mainly used for materials that need to be accurately measured.

Chinese patent ZL02275328.1 discloses a "vertical automatic granular material packaging machine". This machine is a volumetric metering packaging machine. It is composed of feeding sleeve and sealing mechanism. The measuring cup is cylindrical, and adopts the telescopic structure of two measuring cylinder sets. Its volume is adjustable. The main problems of this machine are: 1. Since the measuring cup is cylindrical, the pile of bulk materials formed after falling is conical. Therefore, after the material enters the cylindrical measuring cup, it is easy to form a gap at the upper edge. That is, there is a blanking dead angle at the upper edge of the measuring cup, that is to say, if there is less material in the storage hopper, the measuring cup will not be fully filled, resulting in inaccurate measurement. 2. Because it adopts a volume-adjustable measuring cup as the final measuring instrument, the measurement error is relatively large, and its error is as high as ± 1%, so it cannot meet people's increasingly higher requirements for accurate measurement.

Chinese patent ZL00231710.9 discloses an "automatic grain metering and packaging machine", which is a weighing type metering and packaging machine, which mainly consists of a frame, an elevator, a storage hopper, a metering hopper, a filling hopper, and a sack The clamping mechanism and seaming machine are formed, and the weighing sensor is installed on the weighing hopper, and the coarse and fine discharge gate valves are installed at the bottom of the storage hopper. The gate valve cylinder controls its action, and the gate valve cylinder is controlled according to the signal fed back by the detection device. Gate valve action. When packaging, the coarse and fine discharge gate valves are all opened first, and when the material in the weighing hopper reaches 85% of the set value, the coarse discharge gate valve is closed to reduce the flow rate of the material, and the material slowly flows into the weighing hopper through the fine discharge gate valve , when the set target value is reached, then close the fine discharge gate valve, so as to improve the accuracy of measurement. The main problems of this kind of metering packaging machine are: 1. The speed of packing is slow and the efficiency is low. Since the fine discharging gate valve operates according to the signal fed back by the detection device, in order to ensure the accuracy of metering, the speed at which materials flow into the metering hopper It cannot be too fast, therefore, the work efficiency is lower. 2. The measurement is inaccurate. The machine adopts the method of natural inflow of materials, and the materials often have arching phenomenon. Moreover, in many cases, the quality and distribution of materials are uneven, so it is difficult to guarantee the natural inflow. The material speed is uniform and consistent. Therefore, at the moment when the fine discharge gate valve is closed, the amount of material to be discharged cannot be accurately predicted and controlled. Therefore, it is difficult to achieve accurate measurement, and the qualified rate of bag weight is not high. 3. The gate valve opening and closing device has a complex structure and is realized by a pneumatic device, so the manufacturing cost of the complete machine is relatively high.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the problems of poor measurement accuracy, low efficiency and high manufacturing cost in the existing bulk material packaging machine, and provide a kind of first preliminary measurement, and then quickly add scales, accurate measurement, low cost, and easy to work. High-efficiency bulk material metering and dispensing machine.

The invention includes a frame, a storage hopper and a metering bin. The storage hopper is fixed on the frame, and the metering bin is connected to the frame through a load cell. warehouse, the measurement value of the initial measurement warehouse should be less than 1% to 10% of the standard value, and a vibrating scale adding device connected with the storage hopper to add scale to the measuring warehouse is installed on the frame. The scale hopper is composed of a vibrating device. The initial measuring bin is used to measure the material, and then the vibrating weighing device is used to add the scale to realize the rapid and accurate measurement of the material.

The outlets of the storage hopper, the initial measuring bin and the metering bin are equipped with inserting plates, which are connected to the reciprocating motor, and the reciprocating motor drives the inserting plate to move to open or close the outlets of the storage hopper, the initial measuring bin and the metering bin.

The initial measuring bin is a fixed initial measuring bin or a variable capacity initial measuring bin, so as to meet different demands.

The fixed initial measuring bin and the variable volume initial measuring bin are arranged obliquely to eliminate blanking dead angles and make the preliminary measurement more accurate.

The advantages of the present invention are:

1. Integrate the volumetric measurement and the weighing type measurement into one, use the initial measuring bin to measure the material initially, so that the weight of the material can quickly approach the set measurement value, and then use the vibrating scale adding device to add materials to the measuring bin, so that It quickly reaches the standard value of packaging. Therefore, the invention not only speeds up the speed of metering and packaging, improves work efficiency, but also improves the accuracy of metering and realizes accurate metering of materials.

2. The inclined setting of the initial measuring bin eliminates the dead angle of blanking and makes the preliminary measurement more accurate. At the same time, it is also convenient for the assembly of the reciprocating motor and saves space.

3. The reciprocating motor is used to control the plug-in board to open or close the storage hopper, the initial measuring bin and the metering bin. The structure is simple, the manufacturing cost is low, and the work is stable, the operation is reliable, and the service life is long. The invention has a wide application range and is suitable for particles and powders. The bulk materials can be measured and packaged.

Description of drawings

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

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

Fig. 3 is an enlarged view of part A of Fig. 1;

Fig. 4 is an enlarged view of part B of Fig. 1;

Fig. 5 is the C direction view of Fig. 4;

Fig. 6 is a schematic structural view of another embodiment of the present invention.

Detailed ways

Example 1:

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the present invention includes a frame 1, a storage hopper 8 and a metering bin 3, and the storage hopper 8 is welded with steel plates, the upper end of which is square, and the lower end is triangular , so that the material moves downward, and the storage hopper 8 is fixed on the frame 1; the metering bin 3 is welded by steel plate, and its upper end is square, and the lower end is triangular, so as to facilitate the material moving downward, and the metering bin 3 passes through the load cell 4 is connected with the frame 1, so as to accurately measure the materials in the metering bin 3; there is a hopper 2 under the metering bin 3, and the hopper 2 receives the materials falling from the metering bin 3 and introduces the materials into into the packaging bag; between the storage hopper 8 and the metering bin 3, an initial measuring bin is installed, and the initial measuring bin is used for preliminary metering of the material. The initial measuring bin is a fixed initial measuring bin 6, and the fixed initial measuring bin 6 is welded by steel plate, its shape is square, its width is the same as that of storage hopper 8, and it is installed obliquely to eliminate the dead angle of blanking and make the preliminary measurement more accurate; The vibrating scale adding device 5 for adding scales to the metering bin 3 uses the vibrating type adding scale device 5 to add scales to the metering bin 3 to achieve rapid and accurate metering of materials. The vibrating type adding device 5 consists of a weighing hopper 14 and a The device constitutes that the weighing hopper 14 is installed on the base plate 21 with an elastic support frame 18, and the base plate 21 is installed on the base 20 with a spring 19, and the base 20 is fixed on the frame 1; the vibrating device is an electromagnet vibrating device, It consists of coil base 17, coil 22, moving iron core 16 and fixed iron core 23. In 22, the end of moving iron core 16 is connected together with connecting plate 15 and adding scale hopper 14, drives adding scale hopper 14 to vibrate; Described vibrating device also can be cam type vibrating device or connecting rod type vibrating device, also It can be replaced by vibration devices of other structural forms such as electric vibrator, and its function can be realized; there is a slide 7 at the bottom of the storage hopper 8, and the lower end of the slide 7 is located on the weighing hopper 14, and the slide 7 will store the storage hopper 8 It is connected with the weighing hopper 14 on the vibrating weighing adding device 5, and the material in the storage hopper 8 is introduced into the weighing hopper 14; There is a flashboard 12, and there is a gap at the outlet of the storage hopper 8, and the flashboard 12 passes through the gap, and the gap acts as a limiter for the flashboard 12 to ensure that the flashboard 12 accurately opens or closes the storage hopper 8 The outlet of the fixed initial measuring bin 6 and the outlet of the metering bin 3 are all provided with a slideway 13, and the described slideway 13 is fixed on both sides of the fixed initial measuring bin 6 and the outlet of the metering bin 3, and the inserting plate 12 Assembled in the slideway 13, to ensure that the plugboard 12 accurately opens or closes the outlet of the fixed initial measuring bin 6 and the metering bin 3; the plugboard 12 is connected with the reciprocating motor 9, and the reciprocating motor 9 is an existing component , with a deceleration device on it, a translation rod 10 is arranged on the deceleration device, and its reciprocating motion is realized by using the translation rod 10; a fixed seat 11 is housed on the translation rod 10, and the fixed seat 11 and the flashboard 12 are fixed together, so that the flashboard 12 is connected with the reciprocating motor 9, and the reciprocating motor 9 drives the flashboard 12 to move through its translation rod 10 to open or close the storage hopper 8, the fixed initial measuring bin 6 and the The outlet of metering bin 3.

The metering value of the fixed initial measuring bin 6 of the present invention should be 1-10% less than the standard value, so that a part of material can be added with the vibrating scale adding device 5 to make it reach the standard value.

During work, first open the flashboard 12 at the outlet of the storage hopper 8, add materials to the fixed initial measuring bin 6, and initially measure the material; after the material is full, close the flashboard 12 at the outlet of the storage hopper 8, open the fixed Add the material to the metering bin 3 through the plug-in plate 12 at the outlet of the type initial measuring bin 6, and accurately measure the material; after all the materials enter the metering bin 3, close the plug-in plate 12 at the outlet of the fixed-type initial measuring bin 6 , so that the fixed initial measuring bin 6 carries out the next measurement. At the same time, the vibrating scale adding device 5 starts to work and adds materials to the metering bin 3. When the standard value is reached, the load cell 4 on the metering bin 3 outputs a signal , the vibrating scale adding device 5 stops vibrating; open the flapper valve 12 at the outlet of the metering bin 3, put all the materials into the hopper 2, and the materials enter the packaging bag through the hopper 2 to complete the packing work, and then close the metering The gate valve 12 at the outlet of the warehouse 3 is convenient for the next metering.

Example 2:

As shown in Figure 6, its structure is as embodiment 1, and the difference is that the initial volume storage is a variable volume type volume storage room, so as to change its volume and adapt to the packaging requirements of different weights; The warehouse is arranged inclined to eliminate the blanking dead angle, so that the preliminary measurement is more accurate; the variable volume initial measuring warehouse is composed of a fixed box 24 and a movable box 29, and the movable box 29 is installed in the fixed box 24. Fixed casing 24 is a square casing, and movable casing 29 is a triangular casing, and the outer wall width of movable casing 29 is identical with the inwall width of fixed casing 24, so that moves in fixed casing 24; Described movable casing The body 29 is connected with the volume adjustment device, and the movable box body 29 is driven to move in the fixed box body 24 by the volume adjustment device, so as to change the volume of the variable-capacity initial measuring chamber; the volume adjustment device is composed of a screw 27, a nut 28 and an adjustment Hand wheel 25 is formed, and adjusting hand wheel 25 is fixed on the leading screw 27, and leading screw 27 is installed on the frame 1 with bearing seat 26, and bearing seat 26 plays the effect of limiting the position of leading screw 27, and leading screw 27 can be in bearing seat 26. Rotate in the middle, but can not move along its axis direction, the nut 28 is fixed on the movable box 29, and assembled with the lead screw 27, rotate the adjustment handwheel 25, the nut 28 can move on the lead screw 27, thereby driving The movable box 29 moves in the fixed box 24 .

When the technical solution of this embodiment is in use, the measurement value of the variable capacity initial volume bin must first be determined according to the standard value of the package. Material, make it reach standard value, other working process is identical with embodiment 1.

Claims (4)

1, a kind of metering and separate loading machine for bulk material, comprise frame, storage bin hopper and measuring chute, storage bin hopper is fixed on the frame, measuring chute is connected with frame by LOAD CELLS, it is characterized in that, amount storehouse just is housed between storage bin hopper and measuring chute, just the variable in amount storehouse should be less than standard value 1～10%, on frame, be equipped with storage bin hopper and link, add the oscillatory type of scale to measuring chute and add scale device, described oscillatory type is added scale device by adding weigh hopper and oscillatory system constitutes, utilize first amount storehouse that material is tentatively measured, utilize oscillatory type to add scale device again and add scale, realize the quick accurate measurement of material.

2, metering and separate loading machine for bulk material according to claim 1, it is characterized in that at storage bin hopper, just plate is equipped with in the exit of measuring storehouse and measuring chute, plate is connected with reciprocating motor, drive the plate motion by reciprocating motor, open or close storage bin hopper, just measure the outlet of storehouse and measuring chute.

3, metering and separate loading machine for bulk material according to claim 1 is characterized in that, described amount just storehouse is that fixed type is just measured the storehouse or variable displacement type is just measured the storehouse, to adapt to different demands.

4, metering and separate loading machine for bulk material according to claim 3 is characterized in that, described fixed type is just measured storehouse and variable displacement type and just measured the storehouse and be obliquely installed, and to eliminate the blanking dead angle, makes preliminary metering more accurate.

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