Vacuum feeding machine

Abstract

The utility model discloses a vacuum feeding machine which comprises a charging barrel, a feeding opening is formed in the side wall of the charging barrel, a discharging opening is formed in the bottom of the charging barrel, a material door capable of swinging is arranged corresponding to the discharging opening, a valve body is arranged on the charging barrel, an air storage seat is arranged corresponding to the valve body, and the air storage seat is provided with an air outlet. A first air channel, a transition air cavity and a second air channel which are sequentially communicated are arranged in the valve body, the first air channel is communicated with a positive pressure air pipe in the vacuum generator, the transition air cavity is communicated with an inner cavity of the air storage seat, the second air channel is communicated with an inner cavity of the charging barrel through a filtering assembly, and a valve block is movably arranged in the transition air cavity. The valve plate can block the first air channel or the second air channel, the valve body is further provided with a third air channel, one end of the third air channel is communicated with the vacuum generator, and the other end of the third air channel is communicated with the inner cavity of the charging barrel through the filtering assembly. According to the powder feeding device, automatic feeding of powder can be achieved, the feeding speed is effectively increased, and the high-speed production requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to material conveying equipment, concretely relates to a vacuum feeding machine. BACKGROUND

[0002] The vacuum feeding machine is a kind of equipment that utilizes the negative pressure suction force generated by vacuum to convey granular or powder materials.When the traditional vacuum feeding machine generates sufficient negative pressure suction by vacuum generator, the powder usually falls naturally in the barrel to complete feeding in the hopper, and in the actual practical process, due to the limited falling speed of powder, the powder feeding efficiency is not high, which is difficult to meet the demand of high-speed production.In addition, some feeding machines are also configured on the market, which additionally increase the back-blowing structure, and after completing the suction, the powder is blown down by controlling the back-blowing structure.This way additionally increases the back-blowing air pump, gas tank and other structures, which increases the structure and cost, and the high-pressure gas needs a certain transmission time to enter the barrel, which limits the actual increase in feeding speed. SUMMARY

[0003] In view of the deficiencies of the background art, the technical problem to be solved by the utility model is to provide a vacuum feeding machine for solving the above problems.

[0004] To this end, the utility model is realized by the following scheme:

[0005] A vacuum feeding machine, comprising a barrel, a feed inlet is formed in the side wall of the barrel, a discharge port is arranged at the bottom of the barrel, and a swingable gate is arranged corresponding to the discharge port, characterized in that: a valve body is arranged on the barrel, a gas storage seat is arranged corresponding to the valve body, a first gas channel, a transition gas cavity and a second gas channel are sequentially arranged in the valve body, the first gas channel is communicated with the positive pressure gas pipe in the vacuum generator, the transition gas cavity is communicated with the inner cavity of the gas storage seat, the second gas channel is communicated with the inner cavity of the barrel through a filter assembly, a valve plate is movably arranged in the transition gas cavity, the valve plate can block the first gas channel or the second gas channel, a third gas channel is further arranged on the valve body, one end of the third gas channel is communicated with the vacuum generator, and the other end is communicated with the inner cavity of the barrel through a filter assembly.

[0006] The gate is swingably connected to the barrel, one end of the gate is connected with a weight, and the weight can drive the gate to swing upward to block the discharge port at the bottom of the barrel.

[0007] The filter assembly comprises a filter core, and a filter screen is arranged on the filter core.

[0008] The third gas channel is surrounded by a plurality of third gas channels.

[0009] The vacuum feeding machine has simple structure and reasonable design, the valve body and the gas storage seat with specific structure are arranged, when the vacuum generator works, the negative pressure in the material cylinder can be generated to suck the powder into the material cylinder, the high-pressure gas in the gas storage seat can be stored, after the material is sucked, the high-pressure gas in the gas storage seat can be quickly introduced into the material cylinder from the second gas passage of the valve body, the air pressure at the position is reduced by using the Venturi effect, the air in the third gas passage is also flowed to the material cylinder, the powder in the material cylinder can be rapidly blown to the discharge port to realize the rapid feeding operation. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 It is the sectional view of the utility model;

[0012] Figure 2 It is Figure 1 It is the local enlarged view of the direction of A in the middle;

[0013] Figure 3 It is Figure 2 It is the view when the valve piece moves up to block the first gas passage. DETAILED DESCRIPTION

[0014] As shown in the figure, the utility model discloses a kind of vacuum feeding machine, including material cylinder 4, the side wall of material cylinder 4 is equipped with feed inlet 5, feed inlet 5 is provided with feed pipe 6, material cylinder 4 inside is provided with swingable valve plate 7, when negative pressure is generated inside material cylinder 4, valve plate 7 can be driven to swing up to make feed inlet 5 open, so that powder is inhaled into material cylinder 4, when material cylinder 4 inside has the pushing air pressure of downward, back drive valve plate 7 swing down and block feed inlet 5, avoid powder overflow from feed inlet 5, the bottom of material cylinder 4 is provided with discharge port, swingable material door 3 is provided with corresponding discharge port, valve body 14 is provided on material cylinder 4, gas storage seat 15 is provided corresponding to valve body 14, first gas passage 13, transition gas cavity 17 and second gas passage 19 are sequentially arranged in valve body 14, first gas passage 13 is communicated with positive pressure gas pipe 12 in vacuum generator 11, transition gas cavity 17 is communicated with the inner cavity of gas storage seat 15, specifically, the side wall of transition gas cavity 17 has communicating hole 18 and is communicated with the inner cavity of gas storage seat 15, air inlet 10 is provided on vacuum generator 11 for accessing compressed gas, wherein the accessed compressed air is temporarily stored in gas storage cavity 10A, then is distributed to vacuum generator 11 to generate negative pressure from gas storage cavity 10A, because the air outlet of vacuum generator is much smaller than air inlet 10, thus gas storage cavity 10A forms certain positive pressure, and part of compressed air can be passed into first gas passage 13 through positive pressure gas pipe 12, then is pressed into gas storage seat 15 through transition gas cavity 17 to realize high-pressure gas storage, second gas passage 19 is communicated with the inner cavity of material cylinder 4 through filter assembly, valve piece 20 is movably arranged in transition gas cavity 17, valve piece 20 can block first gas passage 13 or second gas passage 19, third gas passage 16 is further provided on valve body 14, one end of third gas passage 16 is communicated with vacuum generator 11, and the other end is communicated with the inner cavity of material cylinder 4 through filter assembly.

[0015] Further, material door 3 is swingably connected on material cylinder 4, one end of material door 3 is connected with weight 2, weight 2 can drive material door 3 to swing up to block the discharge port of material cylinder 4.Using the above structure, when vacuum extraction is carried out, weight 2 is lowered to drive material door 3 to swing up to block the discharge port of material cylinder 4, to ensure that powder does not overflow from the material cylinder, when powder feeding is carried out, the impact air current generated in material cylinder 4 can press material door 3 to swing down and drive weight 2 to lift, at this time, the discharge port of material cylinder 4 is opened, so that powder falls into hopper 1 to complete feeding.

[0016] Further, filter assembly includes filter element 9, filter screen 8 is arranged on filter element 9.Using this structure, it is ensured that powder does not enter valve body 14 and vacuum generator 11 when vacuum extraction is carried out, to ensure the stability of equipment use.

[0017] Further, third gas passage 16 is surrounded by multiple, which can effectively improve air flow, to ensure the efficiency of equipment extraction and discharge.

[0018] The working principle of the utility model is: first, compressed air is introduced into the vacuum generator, the vacuum generator works to make the third air duct 16 produce negative pressure to draw the air in the barrel 4 upwards, negative pressure is produced in the barrel 4 to make the powder be sucked into the barrel 4 from the feed inlet 5, and part of the compressed air enters the transition air cavity 17 through the positive pressure air pipe 12 and the first air duct 13, at this time, the valve piece 20 is extruded downward by the compressed air and blocks the second air duct 19, at this time, the compressed air enters the inner cavity of the gas storage seat 15 through the through hole 18 via the outer circle slot of the valve piece 20, and part of the compressed air enters the gas storage groove 21 in the valve body, when high pressure is introduced, the pressure in the gas storage groove 21 and the first air duct 13 keep balance, when the powder collection is completed, the compressed air in the gas storage cavity 10A is discharged through the vacuum generator, at this time, the gas in the gas storage groove 21 lifts the valve piece 20 upward, and the high pressure gas stored in the gas storage seat 15 enters the transition air cavity 17 from the communication hole 18 and extrudes and pushes the valve piece 20 upward to block the first air duct 13, at this time, the compressed air can only be discharged from the second air duct 19 and enter the barrel 4 to push the powder downward to quickly fall into the hopper 1 from the opened discharge port, and because the air flow rate at the second air duct 19 is very fast, the pressure is reduced, so that the third air duct 16 near it also produces downward airflow, thereby effectively improving the air flow rate of the powder descending, which can ensure that the powder is quickly pressed into the hopper 1 to complete the discharging operation.

[0019] The utility model discloses this structure, through setting up the valve body and the gas storage seat of specific structure, make the barrel negative pressure that vacuum generator works can produce to suck the powder to the barrel inside, can also store the high pressure gas to the gas storage seat, after completing the material suction, the high pressure gas in the gas storage seat can be extremely fast from the second air duct of valve body and introduce into the barrel, and utilize venturi effect, make the air pressure at this place be small, drive the air in the third air duct also flow to the barrel, make the barrel can produce very big blowing action force in the moment, the powder in the inside is blown to the discharge port fast and sent out, realize the quick feeding operation.

Claims

1. A vacuum feeder, comprising a feed cylinder (4), wherein a feed inlet (5) is provided on the side wall of the feed cylinder (4), and a discharge outlet is provided at the bottom of the feed cylinder (4), and a swingable feed gate (3) is provided corresponding to the discharge outlet, characterized in that: The valve body (14) is arranged on the barrel (4), and a gas storage seat (15) is arranged correspondingly. The valve body (14) is internally provided with a first gas channel (13), a transition gas cavity (17) and a second gas channel (19) which are sequentially communicated. The first gas channel (13) is communicated with a positive pressure gas pipe (12) in the vacuum generator (11). The transition gas cavity (17) is communicated with an inner cavity of the gas storage seat (15). The second gas channel (19) is communicated with an inner cavity of the barrel (4) through a filter assembly. The valve body (14) is internally movably provided with a valve plate (20). The valve plate (20) can block the first gas channel (13) or the second gas channel (19). The valve body (14) is further provided with a third gas channel (16). One end of the third gas channel (16) is communicated with the vacuum generator (11), and the other end is communicated with the inner cavity of the barrel (4) through the filter assembly.

2. A vacuum loading machine according to claim 1, characterized in that: The material door (3) is swingably connected to the barrel (4). One end of the material door (3) is connected with a weight (2). The weight (2) can drive the material door (3) to swing upward and block the discharge port at the bottom of the barrel (4).

3. The vacuum loading machine of claim 1, wherein: The filter assembly comprises a filter core (9). The filter core (9) is provided with a filter screen (8).

4. The vacuum loading machine of claim 1, wherein: The third gas channel (16) is circumferentially provided with a plurality of

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