Vacuum feeding mechanism

Abstract

The utility model discloses a vacuum feeding mechanism which comprises a tank body, the bottom of the tank body is connected with a spiral discharging pipe through a pipeline, a stock bin is arranged on one side of the tank body and communicated with the tank body through a feeding pipe, a right ash removal pulse valve is arranged on the top of the tank body, and materials in the stock bin are pumped into the tank body through the feeding pipe. Flying dust generated during feeding can be filtered and intercepted by a filter bag on the surface of the tank body, a dust layer accumulated in the filter bag can be cleaned through a left dust cleaning pulse valve and a right dust cleaning pulse valve, air is compressed through the left dust cleaning pulse valve and the right dust cleaning pulse valve, the compressed air is sprayed out, the filter bag expands and shrinks instantly and shakes, and the dust layer accumulated in the filter bag is blown off. After blowing-off, blown-off dust is drawn into an external collecting shell from an air pipe through a started induced draft fan to be collected, follow-up cleaning is facilitated, dust layers accumulated in the filter bag are conveniently cleaned through air sprayed out of the left dust cleaning pulse valve and the right dust cleaning pulse valve, and the problem that normal use of equipment is affected due to untimely cleaning is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum feeding, and in particular relates to a vacuum feeding mechanism. Background Art

[0002] Vacuum feeding is to convey materials by generating high vacuum through a vacuum generator. It has the advantages of simple structure, small size, low noise, easy control, etc. Moreover, the high vacuum generated by the vacuum generator can effectively avoid the stratification of the mixture and ensure the uniformity of the material composition.

[0003] Existing, when the main material tank is fed with materials by vacuum feeding, the powder will generate dust under the action of suction, and the dust will enter the negative pressure generating device through the pipeline, which will cause the negative pressure generating device to malfunction and fail to operate. Therefore, it is necessary to filter and intercept the dust generated during feeding by filter bags. However, after the filter bags intercept the dust for a long time, the dust is easy to accumulate in the filter bags to form a dust layer. The formation of the dust layer will have a certain influence on the filtering effect and performance of the filter bags. If it is not cleaned in time, it will affect the filtering effect of the filter bags, thereby affecting the normal use of the equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum feeding mechanism to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum feeding mechanism, comprising:

[0006] A tank body, the bottom of which is connected with a spiral feeding pipe through a pipeline, a silo is provided on one side of the tank body and the silo is connected with the tank body through a feeding pipe, and left and right cleaning pulse valves are provided on the top of the tank body for compressing air and spraying it into the filter bag. Compressed air is sprayed into the filter bag through the left and right cleaning pulse valves to impact the filter bag and vibrate it, so that the dust attached to the surface of the filter bag will be shaken off and exhausted through the induced draft fan on one side of the filter bag, thereby realizing dust-free feeding.

[0007] Preferably, the surface of the induced draft fan is connected to the filter bag via an air duct and left and right cylinders are provided on the surface of the air duct.

[0008] Preferably, capacitive sensors are provided at the top and bottom of the tank body for detecting the upper material level and the lower material level in the tank body.

[0009] Preferably, a mounting plate is provided on the surface of the tank body, a weighing instrument is provided on the surface of the mounting plate, and the weighing instrument is connected to the tank body.

[0010] Preferably, a pneumatic hammer is provided on the surface of the tank body.

[0011] Preferably, a discharge pipe is provided at one end of the bottom of the spiral discharge pipe and a pneumatic discharge valve is provided on the surface of the discharge pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The tank body is evacuated by a vacuum pump, and the material in the silo is pumped into the tank body through the feeding pipe. The dust generated during feeding will be filtered and intercepted by the filter bag on the surface of the tank body, thereby avoiding dust. The material transported through the feeding pipe falls into the tank body and is weighed by the weighing instrument on the surface of the tank body. When the required weight is reached, the feeding is stopped, and the external motor is started to drive the rotating shaft of the spiral feeding pipe to rotate. The spiral blades on the surface of the rotating shaft rotate to transport the material in the tank body, and the material is discharged through the discharge pipe at one end of the bottom of the spiral feeding pipe.

[0014] (2) The dust layer accumulated in the filter bag can be cleaned by the left and right cleaning pulse valves. The compressed air is ejected through the left and right cleaning pulse valves, causing the filter bag to expand and contract instantly, resulting in vibration, and the dust layer accumulated in the filter bag is blown off. After being blown off, the started induced draft fan draws the blown dust from the air duct to the external collection shell for collection, which is convenient for subsequent cleaning. The air ejected from the left and right cleaning pulse valves is more convenient to clean the dust layer accumulated in the filter bag, avoiding the problem of untimely cleaning affecting the normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: 1. Tank body; 2. Spiral discharge pipe; 3. Silo; 4. Loading pipe; 5. Pneumatic discharge valve; 6. Left and right cleaning pulse valves; 7. induced draft fan; 8. Air duct; 9. Left and right cylinders; 10. Capacitive sensor; 11. Mounting plate; 12. Weighing instrument; 13. Air hammer; 14. Discharge pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The utility model provides Figure 1 A vacuum feeding mechanism shown includes:

[0019] A tank body 1 is provided, wherein a spiral feed pipe 2 is connected to the bottom of the tank body 1 through a pipeline, a silo 3 is provided on one side of the tank body 1 and the silo 3 is connected to the tank body 1 through a feed pipe 4, and left and right cleaning pulse valves 6 are provided on the top of the tank body 1 for compressing air and spraying it into the filter bag. Compressed air is sprayed into the filter bag through the left and right cleaning pulse valves 6 to impact the filter bag to vibrate, so that dust attached to the surface of the filter bag will be shaken off and exhausted through the induced draft fan 7 on one side of the filter bag, thereby realizing dust-free feeding.

[0020] The surface of the induced draft fan 7 is connected to the filter bag through an air duct 8, and the surface of the air duct 8 is provided with left and right cylinders 9. When the left and right cylinders 9 work, the piston rods of the cylinders will push the valve cores of the left and right cleaning pulse valves 6 to move, so that the compressed air is instantly sprayed into the filter bag to achieve the purpose of cleaning.

[0021] Capacitive sensors 10 are provided at the top and bottom of the tank body 1 for detecting the upper material level and the lower material level in the tank body 1 .

[0022] A mounting plate 11 is disposed on the surface of the tank body 1 , a weighing instrument 12 is disposed on the surface of the mounting plate 11 , and the weighing instrument 12 is connected to the tank body 1 .

[0023] The surface of the tank body 1 is provided with an air hammer 13. When the material needs to be discharged, the air hammer 13 can knock the tank body 1. The knocking of the air hammer 13 can accelerate the flow speed of the material and improve the production efficiency. For the agglomerated material, the knocking of the air hammer 13 can loosen the agglomerated material.

[0024] A discharge pipe 14 is provided at one end of the bottom of the spiral discharge pipe 2 and a pneumatic discharge valve 5 is provided on the surface of the discharge pipe 14. The pneumatic discharge valve 5 can control the opening and closing of the discharge pipe 14 to adjust the flow rate of the material through the discharge pipe 14. When the pneumatic discharge valve 5 is fully opened, the material can flow freely; when the pneumatic discharge valve 5 is closed, the material flow is cut off.

[0025] The vacuum feeding mechanism uses a vacuum pump to evacuate the tank body 1, and pumps the material in the silo 3 into the tank body 1 through the feeding pipe 4. The dust generated during feeding will be filtered and intercepted by the filter bag on the surface of the tank body 1, so as to avoid dust. The material transported through the feeding pipe 4 falls into the tank body 1 and is weighed by the weighing instrument 12 on the surface of the tank body 1. When the required weight is reached, the feeding is stopped, and the external motor is started to drive the rotating shaft of the spiral feeding pipe 2 to rotate, and the spiral blades on the surface of the rotating shaft rotate to the tank body 1. The material in the tank body 1 is transported and discharged through the discharge pipe 14 at one end of the bottom of the spiral discharge pipe 2. The material is transported and discharged through the spiral discharge pipe 2, and the material can be discharged quantitatively. When the material is discharged continuously, the capacitive sensor 10 at the bottom of the tank body 1 detects that the object is away from the sensor, and it will send a control signal to control the input pump on the surface of the feeding pipe 4 to pump the material in the silo 3 into the tank body 1 for replenishment. When the capacitive sensor 10 at the top of the tank body 1 detects the material, it sends a control signal to control the feeding pipe 4 to stop transporting the material.

[0026] The dust layer accumulated in the filter bag can be cleaned by the left and right cleaning pulse valves 6. The air compressed by the left and right cleaning pulse valves 6 is ejected, causing the filter bag to expand and contract instantly, generating vibration, and blowing off the dust layer accumulated in the filter bag. After being blown off, the started induced draft fan 7 draws the blown dust from the air duct 8 to the external collection shell for collection, which is convenient for subsequent cleaning. In addition, it is more convenient to clean the dust layer accumulated in the filter bag with the air ejected by the left and right cleaning pulse valves 6, thereby avoiding the problem of affecting the normal use of the equipment due to untimely cleaning.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum feeding mechanism, characterized in that: include: A tank body (1), the bottom of which is connected to a spiral feed pipe (2) via a pipeline, a silo (3) is provided on one side of the tank body (1) and the silo (3) is connected to the tank body (1) via a feed pipe (4), and a left and right cleaning pulse valve (6) is provided on the top of the tank body (1) for compressing air and spraying it into a filter bag, and compressed air is sprayed into the filter bag via the left and right cleaning pulse valves (6) to impact the filter bag and vibrate it, so that dust attached to the surface of the filter bag is shaken off and the dust is exhausted through an induced draft fan (7) on one side of the filter bag, thereby realizing dust-free feeding.

2. A vacuum feeding mechanism according to claim 1, characterized in that: The surface of the induced draft fan (7) is connected to the filter bag via an air duct (8), and left and right cylinders (9) are provided on the surface of the air duct (8).

3. A vacuum feeding mechanism according to claim 1, characterized in that: Capacitive sensors (10) are provided at the top and bottom of the tank body (1) for detecting the upper material level and the lower material level in the tank body (1).

4. A vacuum feeding mechanism according to claim 1, characterized in that: A mounting plate (11) is provided on the surface of the tank body (1), a weighing instrument (12) is provided on the surface of the mounting plate (11), and the weighing instrument (12) is connected to the tank body (1).

5. A vacuum feeding mechanism according to claim 1, characterized in that: A pneumatic hammer (13) is provided on the surface of the tank body (1).

6. A vacuum feeding mechanism according to claim 1, characterized in that: A discharge pipe (14) is provided at one end of the bottom of the spiral discharge pipe (2), and a pneumatic discharge valve (5) is provided on the surface of the discharge pipe (14).

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