Device and method for eliminating powder blanking dust

Abstract

The invention relates to the technical field of powder discharging equipment, in particular to a device and method for eliminating powder discharging dust, the device comprises a negative pressure dust removal mechanism, a discharging mechanism, a powder collecting mechanism and a pressure adjusting mechanism, the top end of the discharging mechanism is communicated with the negative pressure dust removal mechanism, one side of the powder collecting mechanism is communicated with the discharging end of the discharging mechanism, and the other side of the powder collecting mechanism is communicated with the pressure adjusting mechanism. One side of the pressure adjusting mechanism is communicated with the negative pressure dust removal mechanism, the pressure adjusting mechanism is installed on the powder collecting mechanism and used for monitoring and adjusting the pressure intensity in the powder collecting mechanism, the two-way spiral blade discharger is used, the situation that a rotating shaft of the two-way spiral blade discharger is subjected to large torque load and fractures is avoided, dust is collected and filtered by arranging the negative pressure dust removal mechanism, and the dust removal efficiency is improved. And by arranging the pressure adjusting mechanism, the pressure in the powder collecting mechanism is monitored in real time and actively adjusted, so that the powder collecting mechanism is always kept in a micro-negative pressure state, and the powder discharging efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of powder feeding equipment, and in particular to a device and method for eliminating powder feeding dust. Background Art

[0002] At present, due to the characteristics of powder itself: it is easy to get wet and clump and stick in a humid environment, and it is easy to generate static electricity and stick to the silo in a dry environment, and it is easy to form arches or bridges when unloading, which makes it difficult to unload powder from the conical silo. In the existing technology, the problem of difficult powder unloading is often solved by adding a stirrer, but the existing stirrer often has the following problems: 1. Existing agitators mainly include paddle type, turbine type, frame type and anchor type. These agitator structures are mainly designed for material mixing, not for powder feeding, especially at the feeding port of the silo, the powder does not flow, making it difficult to feed the powder.

[0003] 2. The existing agitator motor is installed on the top of the silo. Since the materials are concentrated at the bottom of the silo, the middle agitator shaft is subjected to a large torque load and is prone to breakage.

[0004] 3. The existing agitator cannot solve the problem of material accumulation at the bottom of the silo and squeezing at the discharge port.

[0005] In addition, during the material discharge process, dust easily overflows from the equipment, causing environmental pollution. The current solution is to install a breathing valve on the receiving tank to passively adjust the air pressure inside the receiving tank to maintain balance with the external environment and reduce dust. However, this method has many disadvantages: 1. After a period of use, the powder will clog the breathing valve filter, causing the breathing valve to fail.

[0006] 2. When the temperature difference between the inside and outside of the receiving tank is large in winter, the breathing valve is at the junction of hot and cold, which can easily cause the breathing valve to be blocked, stuck, frozen, leaked, stuck, and other faults.

[0007] 3. When the breathing valve is placed externally, it may rust and corrode, and various impurities may mix in and cause blockage; 4. Currently, the breathing valves in the prior art basically do not have the function of real-time status monitoring, so once a problem occurs, it cannot be discovered and solved in the first time.

[0008] Therefore, how to avoid the difficulty of powder feeding and implement active pressure monitoring and active adjustment of the receiving device has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0009] The present invention provides a device and method for eliminating powder feeding dust, which are used to solve the problem of how to avoid the difficulty of powder feeding and implement active pressure monitoring and active regulation of a receiving device.

[0010] The present invention provides a device and method for eliminating dust during powder feeding, comprising: Negative pressure dust removal mechanism; Feeding mechanism; the top end is connected with the negative pressure dust removal mechanism; Powder collecting mechanism; one side is connected with the discharge end of the feeding mechanism, and the other side is connected with the negative pressure dust removal mechanism; Pressure adjustment mechanism; installed on the powder collecting mechanism, used to monitor and adjust the pressure inside the powder collecting mechanism.

[0011] In some embodiments, the negative pressure dust removal mechanism includes: Negative pressure fan; Bag-type dust collector; one end of the bag-type dust collector is connected to the air inlet of the output end of the negative pressure fan, and the adsorption end of the bag-type dust collector is connected to the inside of the powder collection mechanism through a pipeline.

[0012] In some embodiments, it also includes: Airtight valve; one end is connected to one side of the bag-type dust collector; Hose A; one end is connected to the other end of the airtight valve, and the other end is communicated with the inside of the feeding mechanism.

[0013] In some of the embodiments, a regulating valve is installed on the pipeline connecting the bag-type dust collector and the powder collecting mechanism.

[0014] In some embodiments, the unloading mechanism includes: Silo; Bidirectional spiral blade feeder; rotatably connected to the inside of the silo; The motor; the output end is connected with the bidirectional spiral blade feeder; Hose B; one end of which is detachably connected to the discharge end of the silo, and the other end of which is detachably connected to the powder collecting mechanism.

[0015] In some of the embodiments, the bidirectional spiral blade feeder is vertically arranged, and the radial dimension of the blade increases gradually from bottom to top.

[0016] In some embodiments, the pressure adjustment mechanism includes: Controller; A pressure sensor; the detection end is located inside the powder collecting mechanism, and the pressure sensor is electrically connected to the controller; Sound and light alarm; electrically connected to the controller.

[0017] In some embodiments, the controller is electrically connected to the motor and the regulating valve, respectively.

[0018] A method for eliminating dust during powder feeding, wherein raw material powder is placed inside a silo, a motor is started, and a bidirectional spiral blade feeder is driven to rotate, so that the raw material powder is transported to a powder collecting mechanism; The inside of the powder collecting mechanism is kept at a slight negative pressure, and the pressure inside the powder collecting mechanism is monitored in real time through a pressure sensor; If the internal pressure of the powder collecting mechanism is positive, the pressure sensor transmits the information to the controller, and the controller controls the motor to reduce the speed and increase the opening of the regulating valve; If the internal pressure of the powder collecting mechanism is a relatively large negative pressure, the pressure sensor transmits the information to the controller, and the controller controls the motor to increase the speed and reduce the opening of the regulating valve.

[0019] In some embodiments, if the pressure sensor detects that the pressure in the powder collecting mechanism exceeds the set maximum and minimum values, the controller controls the motor to stop and sounds an alarm.

[0020] The beneficial effects of the present invention are as follows: raw material powder is added to the silo, and the starting motor drives the bidirectional spiral blade feeder to rotate, and the bidirectional spiral blade feeder drives the powder in the middle of the silo to lift upward, and the powder on the side of the bidirectional spiral blade feeder continuously "flows" downward and is finally input into the powder collecting mechanism, and the powder on the bidirectional spiral blade feeder will continuously move to the side of the bidirectional spiral blade feeder during the lifting process, and "flows" downward and is finally input into the powder collecting mechanism, thereby avoiding the formation of arches or bridges of powder in the silo, and at the same time, the radial size of the blades of the bidirectional spiral blade feeder in the present invention gradually increases from bottom to top. Gradually increase, so that the distance between its blades and the inner wall of the silo can be maintained at an appropriate distance, and the powder lumps on the inner wall of the silo can be broken. At the same time, during the unloading process, if the internal pressure of the powder collection mechanism is positive pressure, the pressure sensor transmits information to the controller, and the controller controls the motor to reduce the speed, and at the same time increases the opening of the regulating valve to quickly exhaust. If the internal pressure of the powder collection mechanism is a large negative pressure, the pressure sensor transmits information to the controller, and the controller controls the motor to increase the speed, and at the same time reduces the opening of the regulating valve to slow down the exhaust and restore it to a state of slight negative pressure. The state of slight negative pressure is helpful for powder unloading. If the pressure sensor detects that the pressure inside the powder collection mechanism exceeds the set maximum and minimum values, the controller controls the motor to stop and alarm. In the technical solution of the present invention, not only can the powder be unloaded quickly, but also the dust generated by the powder unloading can be recovered to prevent the powder lumps from being adsorbed on the inner wall of the silo. At the same time, the pressure adjustment mechanism can be monitored in real time and active pressure adjustment can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a structural schematic diagram of a device and method for eliminating dust from powder feeding according to the present invention from one perspective; Figure 2 yes Figure 1 A schematic diagram of the structure of the inner wall of a silo in a device and method for eliminating dust during powder feeding is shown; In the attached drawings, 1. negative pressure dust removal mechanism; 11. negative pressure fan; 12. bag-type dust collector; 13. airtight valve; 14. hose A; 15. regulating valve; 2. feeding mechanism; 21. silo; 22. bidirectional spiral blade feeding device; 23. motor; 24. hose B; 25. agglomeration crushing knife; 26. electric vibrator; 3. powder collecting mechanism; 4. pressure adjusting mechanism. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] As mentioned in the background technology, the existing agitators mainly include paddle type, turbine type, frame type and anchor type. These agitator structures are mainly designed for material mixing, not for powder feeding, especially at the feeding port of the silo, the powder does not flow, resulting in difficulty in powder feeding. The existing agitator motor is installed on the top of the silo. Since the materials are concentrated at the bottom of the silo, the middle agitator shaft is subjected to a large torque load and is prone to breakage. The existing agitator cannot solve the problem of material accumulation and squeezing at the feeding port at the bottom of the silo. In addition, during the feeding process of the silo, dust easily overflows from the equipment, causing environmental pollution. The current solution is to install a breathing valve on the receiving tank, passively adjust the air pressure inside the receiving tank, maintain balance with the external environment, and reduce dust. However, this method has many disadvantages: after a period of use, the powder will block the breathing valve filter, making the breathing valve ineffective. When the temperature difference between the inside and outside of the receiving tank is large in winter, the breathing valve is at the junction of hot and cold, which is prone to cause breathing valve blockage, adhesion, freezing, leakage, stuck and other faults. When the breathing valve is placed externally, it may rust and corrode, and various impurities may mix in and cause blockage. Currently, the breathing valves in the existing technology basically do not have the function of real-time status monitoring, so once a problem occurs, it cannot be discovered and solved in the first time. Therefore, how to avoid the difficulty of powder feeding and implement active pressure monitoring and active adjustment of the receiving device has become a technical problem that technicians in this field need to solve urgently.

[0024] To solve the above problems, refer to Figure 1 and Figure 2The present invention provides a device for eliminating dust during powder feeding, comprising: a negative pressure dust removal mechanism 1, a feeding mechanism 2, a powder collecting mechanism 3 and a pressure adjustment mechanism 4. The top of the feeding mechanism 2 is connected to the negative pressure dust removal mechanism 1, one side of the powder collecting mechanism 3 is connected to the discharge end of the feeding mechanism 2, and the other side is connected to the negative pressure dust removal mechanism 1. The pressure adjustment mechanism 4 is installed on the powder collecting mechanism 3 and is used to monitor and adjust the pressure inside the powder collecting mechanism 3.

[0025] Preferably, the negative pressure dust removal mechanism 1 includes: a negative pressure fan 11 and a bag-type dust collector 12, one end of the bag-type dust collector 12 is connected to the air inlet at the output end of the negative pressure fan 11, and the adsorption end of the bag-type dust collector 12 is connected to the interior of the powder collection mechanism 3 through a pipeline.

[0026] Specifically, the powder collecting mechanism 3 can be a receiving tank or a reactor, and the specific selection can be made according to actual production conditions. The dust generated by the powder collecting mechanism 3 when collecting powder is transported to the bag-type dust collector 12 through a pipeline. The bag-type dust collector 12 filters the dust, intercepts the powder, and discharges the air, thereby avoiding the traditional process of using a breathing valve to dissipate dust to the outside world and pollute the environment.

[0027] Preferably, it also includes: an airtight valve 13 and a hose A14, one end of the airtight valve 13 is connected to one side of the bag-type dust collector 12, one end of the hose A14 is connected to the other end of the airtight valve 13, and the other end is connected to the interior of the unloading mechanism 2.

[0028] Specifically, dust is also generated in the unloading mechanism 2 during the unloading process, and the dust in the unloading mechanism 2 is transported to the bag-type dust collector 12 through the hose A14 for treatment.

[0029] Preferably, a regulating valve 15 is installed on the pipeline connecting the bag-type dust collector 12 and the powder collecting mechanism 3 .

[0030] Preferably, the feeding mechanism 2 includes: a silo 21, a bidirectional spiral blade feeder 22, a motor 23 and a hose B24. The bidirectional spiral blade feeder 22 is rotatably connected to the interior of the silo 21. The output end of the motor 23 is transmission-connected to the bidirectional spiral blade feeder 22. One end of the hose B24 is detachably connected to the discharge end of the silo 21, and the other end is detachably connected to the powder collecting mechanism 3.

[0031] Specifically, a top cover can be installed on the top of the silo 21 to prevent the dust in the silo 21 from escaping to the outside. In order to avoid negative pressure in the silo, a breathing hole can be opened on the top cover to maintain the pressure inside the silo 21 stable. At the same time, the position of the transmission connection between the motor 23 and the bidirectional spiral blade feeder 22 in the present invention is at the lower part of the silo 21, and the transmission connection form can be chain drive or belt drive, which avoids the problem that the shaft of the bidirectional spiral blade feeder 22 is subjected to a large torque load and is prone to breakage due to the powder being concentrated at the bottom of the silo 21.

[0032] Preferably, the bidirectional spiral blade feeder 22 is vertically arranged, and the radial dimension of the blades gradually increases from bottom to top.

[0033] Specifically, since the silo is in an inverted cone shape, narrow at the bottom and wide at the top, the present invention is correspondingly provided with a bidirectional spiral blade feeder 22 which is narrow at the bottom and wide at the top, so that the blades of the bidirectional spiral blade feeder 22 are always kept at a suitable position away from the silo 21, thereby playing a certain role in breaking up powder agglomerates.

[0034] Furthermore, in the technical solution of the present invention, a wavy agglomerate crushing knife 25 is installed on the inner wall of the silo. When the powder is conveyed, the agglomerates move up and down with the powder and continuously contact the agglomerate crushing knife 25, so that the agglomerate crushing knife 25 has the effect of crushing the powder agglomerates. As for the agglomerates attached to the inner wall of the silo 21, the present invention installs an electric vibrator 26 on the outer wall of the silo 21. The agglomerates attached to the inner wall of the silo 21 can be cleaned by simply starting the electric vibrator 26.

[0035] Furthermore, since the bidirectional spiral blade feeder 22 uses two blades with different rotation directions, when the bidirectional spiral blade feeder 22 rotates "outward", the powder at the feed port of the silo 21 is pushed by the blades and moves downward, realizing continuous feeding; the material in the middle of the silo 21 is pushed upward by the blades of the bidirectional spiral blade feeder 22, thereby reducing the backlog of powder at the bottom of the silo 21, improving the fluidity of the material, thereby reducing the phenomenon of material adhesion and arching, and making the feeding smooth. At the same time, the motor 23 is installed on the side close to the powder feed port, so that the force of the bidirectional spiral blade feeder 22 is more reasonable, and the service life of the equipment is improved.

[0036] Preferably, the pressure adjustment mechanism 4 includes: a controller, a pressure sensor and an audible and visual alarm, the detection end of the pressure sensor is located inside the powder collecting mechanism 3, and the pressure sensor is electrically connected to the controller, and the audible and visual alarm is electrically connected to the controller.

[0037] Preferably, the controller is electrically connected to the motor 23 and the regulating valve 15 respectively.

[0038] Specifically, the controller of the present invention adopts a DCS control system, and receives a transmission signal through the DCS control system to realize active control.

[0039] A method for eliminating dust during powder feeding, wherein raw material powder is placed inside a silo 21, a motor 23 is started, and a bidirectional spiral blade feeder 22 is driven to rotate, so that the raw material powder is transported to a powder collecting mechanism 3; The inside of the powder collecting mechanism 3 is kept at a slight negative pressure, and the pressure inside the powder collecting mechanism 3 is monitored in real time by a pressure sensor; If the internal pressure of the powder collecting mechanism 3 is positive, the pressure sensor transmits the information to the controller, and the controller controls the motor 23 to reduce the rotation speed and increase the opening of the regulating valve 15 to reduce the feeding amount and increase the exhaust volume; If the internal pressure of the powder collecting mechanism 3 is a relatively large negative pressure, the pressure sensor transmits information to the controller, and the controller controls the motor 23 to increase the speed and reduce the opening of the regulating valve 15, thereby increasing the discharge amount and reducing the exhaust amount; After the powder collecting mechanism 3 is restored to a slight negative pressure, the regulating valve 15 and the motor 23 resume normal working state.

[0040] Preferably, if the pressure sensor detects that the pressure in the powder collecting mechanism 3 exceeds the set maximum and minimum values, the controller controls the motor 23 to stop and sounds an alarm.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for eliminating dust from powder feeding, characterized in that: include: Negative pressure dust removal mechanism (1); A feeding mechanism (2); the top end of which is connected to the negative pressure dust removal mechanism (1); A powder collecting mechanism (3); one side of which is connected to the discharge end of the feeding mechanism (2), and the other side of which is connected to the negative pressure dust removal mechanism (1); A pressure adjustment mechanism (4) is installed on the powder collecting mechanism (3) and is used to monitor and adjust the pressure inside the powder collecting mechanism (3).

2. The device for eliminating powder material dust according to claim 1, characterized in that: The negative pressure dust removal mechanism (1) comprises: Negative pressure fan (11); A bag-type dust collector (12); one end of the bag-type dust collector (12) is connected to the air inlet of the output end of the negative pressure fan (11), and the adsorption end of the bag-type dust collector (12) is connected to the inside of the powder collection mechanism (3) through a pipeline.

3. The device for eliminating powder material dust according to claim 2, characterized in that: Also includes: An airtight valve (13); one end of which is connected to one side of the bag-type dust collector (12); A hose A (14) has one end connected to the other end of the airtight valve (13), and the other end communicates with the interior of the unloading mechanism (2).

4. The device for eliminating powder material dust according to claim 2, characterized in that: A regulating valve (15) is installed on the pipeline connecting the bag-type dust collector (12) and the powder collecting mechanism (3).

5. The device for eliminating dust from powder feeding according to claim 4, characterized in that: The unloading mechanism (2) comprises: Silo (21); A bidirectional spiral blade feeder (22) is rotatably connected to the interior of the silo (21); The motor (23) has an output end which is transmission-connected to the bidirectional spiral blade feeder (22); A hose B (24) having one end detachably connected to the discharge end of the silo (21) and the other end detachably connected to the powder collecting mechanism (3).

6. The device for eliminating dust from powder feeding according to claim 5, characterized in that: The bidirectional spiral blade feeder (22) is arranged vertically, and the radial dimension of the blades gradually increases from bottom to top.

7. The device for eliminating dust from powder feeding according to claim 5, characterized in that: The pressure adjustment mechanism (4) comprises: Controller; A pressure sensor; the detection end is located inside the powder collecting mechanism (3), and the pressure sensor is electrically connected to the controller; An audible and visual alarm is electrically connected to the controller.

8. The device for eliminating dust from powder feeding according to claim 7, characterized in that: The controller is electrically connected to the motor (23) and the regulating valve (15) respectively.

9. A method for eliminating dust from powder feeding, implemented by using the device for eliminating dust from powder feeding according to any one of claims 1 to 8, characterized in that: The raw material powder is placed inside the silo (21), and the motor (23) is started to drive the bidirectional spiral blade feeder (22) to rotate, so that the raw material powder is transported to the powder collection mechanism (3); The interior of the powder collecting mechanism (3) is maintained at a slight negative pressure, and the pressure inside the powder collecting mechanism (3) is monitored in real time by a pressure sensor; If the internal pressure of the powder collecting mechanism (3) is positive pressure, the pressure sensor transmits information to the controller, and the controller controls the motor (23) to reduce the rotation speed and increase the opening of the regulating valve (15); If the internal pressure of the powder collecting mechanism (3) is negative pressure, the pressure sensor transmits information to the controller, and the controller controls the motor (23) to increase the rotation speed and reduce the opening of the regulating valve (15).

10. The method for eliminating powder material dust according to claim 9, characterized in that: If the pressure sensor detects that the pressure in the powder collecting mechanism (3) exceeds the set maximum and minimum values, the controller controls the motor (23) to stop and sound an alarm.

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