CN114870715A

CN114870715A - Positive pressure air-jet mixer for dry powder production

Info

Publication number: CN114870715A
Application number: CN202210507047.1A
Authority: CN
Inventors: 王继辉
Original assignee: Anhui Shengcheng New Material Co ltd
Current assignee: Anhui Shengcheng New Material Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-09
Anticipated expiration: 2042-05-10
Also published as: CN114870715B

Abstract

The invention discloses a positive-pressure air-jet mixing machine for dry powder production, which comprises a tank body with an air interface, wherein a material distribution mechanism and a feeding mechanism are arranged in the tank body, the material distribution mechanism is upwards communicated with the interface to enable the interior to form a positive pressure state, and an air outlet capable of changing the positive pressure state through opening and closing is formed in the bottom of the material distribution mechanism; the feeding mechanism is lower than the lowest end of the air outlet hole, powder is loaded in the feeding mechanism, the feeding mechanism is provided with a fixed reciprocating motion path, and when the feeding mechanism moves to a terminal point of the path, the air outlet hole is triggered to be opened so as to transmit the positive pressure state into the feeding mechanism and form airflow for blowing and scattering the powder. According to the invention, the feeding mechanism for storing different powders intermittently moves towards the material distribution mechanism, and the movement of the feeding mechanism intermittently triggers the positive pressure state in the material distribution mechanism to be transmitted to the feeding mechanism, so that different powders in different feeding mechanisms are blown off and thinly spread at the bottom of the tank body by the positive pressure gas intermittently, and the effective mixing of various dry powders can be realized.

Description

Positive pressure air-jet mixer for dry powder production

Technical Field

The invention belongs to the technical field of coating production equipment, and particularly relates to a positive-pressure air-jet mixer for dry powder production.

Background

Various powders such as titanium dioxide, activated carbon, talcum powder, light calcium carbonate or bentonite are frequently used in the production of the coating, and the mixing of various powders is also involved in the production process. The traditional mixing method is that the materials are weighed and poured into a certain container together, and then mechanical stirring is carried out by adopting a stirring paddle, the problem that the materials cannot be fully mixed due to the difference of density, fluidity and the like of the stirred media can exist in the mechanical stirring, and meanwhile, the product quality is influenced and the power loss is increased due to the fact that the products are broken due to frictional heat generated by the mechanical stirring.

Disclosure of Invention

The invention provides a positive pressure air-blast mixer for dry powder production aiming at the problems in the prior art, and the specific technical scheme is as follows:

the dry powder production is with malleation towards air current mixer includes:

the tank body is provided with an interface for introducing gas from the top;

the distribution mechanism is arranged in the tank body, is upwards communicated with the interface to enable the interior to form a positive pressure state, and is provided with an air outlet hole capable of changing the positive pressure state through opening and closing at the bottom; and

the feeding mechanism is lower than the lowest end of the air outlet hole, powder is loaded in the feeding mechanism, the feeding mechanism is provided with a fixed reciprocating motion path, and when the feeding mechanism moves to a terminal point of the path, the air outlet hole is triggered to be opened so as to transmit the positive pressure state into the feeding mechanism and form airflow for blowing the powder away and scattering.

Preferably, the feeding mechanisms are at least provided in two groups, and different feeding mechanisms perform intermittent reciprocating motion.

Preferably, the distributing mechanism is provided with a disc body arranged in the tank body, the air outlet is arranged at the bottom of the disc body, a plug body for blocking the air outlet and three connecting rods for triggering the plug body to open and close are arranged in the disc body, the three connecting rods comprise a third connecting rod horizontally extending to the outside of the disc body, a first connecting rod capable of vertically sliding to extend out of the inner bottom surface of the disc body and jacking the plug body, and a second connecting rod with two ends respectively hinged with the first connecting rod and the third connecting rod, and the three connecting rods can convert vertical axial movement of the first connecting rod and horizontal axial movement of the third connecting rod.

Preferably, the top of the plug body is provided with a compression spring for resetting the plug body, and the connecting rod III is sleeved with a first spring for resetting the connecting rod III.

Preferably, a stepped hole for limiting the plug body is formed in the contact surface of the disc body and the plug body.

Preferably, the feeding mechanism comprises a feeding tray and a push rod, powder is stored in the feeding tray, the push rod is connected with the feeding tray, and a plug pin capable of contacting the third connecting rod and pushing the third connecting rod to move axially is arranged on the push rod.

Preferably, the push rod comprises a first rod and a second rod which are matched with each other in a telescopic mode, an elastic piece in a reset extension state is arranged between the first rod and the second rod, the first rod is connected with the feeding disc, the bolt is arranged on the second rod, a groove matched with the first rod is formed in the bottom surface of the disc body, and a step limiting surface is formed at the tail end of the groove.

Preferably, when the first rod contacts the step limiting surface, the plug pin does not or just contact the third connecting rod.

Preferably, the feeding tray is a hollow shell, an annular feeding hole is formed in the top of the feeding tray, and a blanking channel is formed by extending below the feeding hole; the feeding plate is characterized in that an air tap is arranged in the center of the top of the feeding plate, the air tap protrudes out of the top surface of the feeding plate under the action of a second spring in a normal state, the air tap extends downwards into an air cavity, the air cavity and a blanking channel are formed in a separated mode through an elastic sealing surface, an air outlet is formed in the elastic sealing surface, and when the air outlet is opened, a sealed air flow channel is formed through an air outlet hole, the air tap, the air cavity, the air outlet and the lower section of the blanking channel.

Preferably, the lower end of the blanking channel is provided with a U-shaped material storage section and an inverted U-shaped material spraying section, the U-shaped material storage section and the inverted U-shaped material spraying section are horizontally arranged and connected, and the U-shaped material spraying section is specifically provided with a downward inclined discharge port.

The invention has the beneficial effects that: according to the invention, the feeding mechanism for storing different powders intermittently moves towards the material distribution mechanism, and the movement of the feeding mechanism intermittently triggers the positive pressure state in the material distribution mechanism to be transmitted to the feeding mechanism, so that different powders in different feeding mechanisms are blown off and thinly spread at the bottom of the tank body by the positive pressure gas intermittently, and the effective mixing of various dry powders can be realized.

Drawings

FIG. 1 is a schematic view of the overall structure of a mixer;

FIG. 2 is a schematic view of the matching relationship between the material distributing mechanism and the material feeding mechanism;

FIG. 3 is a schematic view of a tray bottom structure of the material distribution mechanism;

FIG. 4 is a schematic structural view of the push rod;

FIG. 5 is a schematic structural view of the feed tray in an inoperative state;

FIG. 6 is a schematic view of the feed tray in an operating state;

FIG. 7 is a schematic view of the fit relationship between the push rod and the groove;

FIG. 8 is a schematic structural diagram of feeding and receiving materials in the tank body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments.

Examples

As shown in fig. 1 and 2, a schematic structural diagram of a positive pressure air-jet mixer for dry powder production is shown, the mixer main body is a tank-shaped structure, and includes a tank body 100, a port 101 for introducing air is provided at the top of the tank body 100, a material distribution mechanism 200 and a material distribution mechanism 300 are fixedly installed inside the tank body 100, the material distribution mechanism 200 is communicated with the port 101, the material distribution mechanism 200 is supplied with air through the port 101 to generate positive pressure, the position between the material distribution mechanism 200 and the material distribution mechanism 300 can be changed, when the material distribution mechanism 300 moves to a position below the material distribution mechanism 200 and is in butt joint with the material distribution mechanism, the air inside the material distribution mechanism 200 can enter the material distribution mechanism 300, and simultaneously, a certain amount of dry powder stored in the material distribution mechanism 300 is blown away and scattered to the bottom of the tank body 100 through the positive pressure air. Wherein the feeding mechanisms 300 are arranged one by one, but a plurality of feeding mechanisms 300 are arranged, different types of dry powder are stored in different feeding mechanisms 300, and different types of dry powder can be thinly paved on the bottom of the tank body 100 through the alternate intermittent matching of different feeding mechanisms 300 and the distributing mechanism 200, so that the uniform mixing of different dry powders can be realized while the different dry powders are collected.

In different embodiments of the present invention, the feeding mechanisms 300 are all disposed below the material distributing mechanism 200, but the position relationship between the feeding mechanisms 300 and the material distributing mechanism 200 may be uncertain, for example, in an embodiment of the present invention, the feeding mechanisms 300 are annularly distributed around the material distributing mechanism 200, as shown in fig. 2. In other embodiments, the feeding mechanisms 300 may be equally angularly spaced within an angular sector.

As shown in fig. 2, the material distribution mechanism 200 has a tube 201 and a tray 202, the tube 201 is disposed on the top of the tray 202, and the tray 202 has a cavity therein, the tube 201 is communicated with the cavity of the tray 202, and the tube 201 is also communicated with the port 101, so that the gas passes through the port 101 and the tube 201 to enter the cavity of the tray 202. The position of the tray 202 in the can 100 is fixed, and the fixing manner is not fixed, for example, the tray 202 can be suspended in the can 100 by welding a metal rod, or the tray 202 can be fixed directly by the connection of the tube 201.

As shown in fig. 3, a structural diagram of the tray bottom of the tray body 202 is shown, and the tray body 202 is partially shown by a cut line to collectively represent the structure of the tray bottom of the tray body 202. The bottom of the tray body 202 has air outlet holes 203, and air in the tray body 202 can be discharged through the air outlet holes 203. Meanwhile, a plug body 204 used for plugging the air outlet 203 is further arranged inside the disc body 202, the plug body 204 can move, when the plug body 204 is jacked up, the plug body 204 is separated from the air outlet 203, the gas in the disc body 202 can be discharged, and when the plug body 204 is reset, the plug body 204 can plug the air outlet 203 again.

As shown in fig. 3, a multi-link structure is disposed in a tray bottom of the tray body 202 for jacking up the plug body 204, the multi-link structure is a three-link structure, and includes a first link 205, a second link 206, and a third link 207, which are connected in sequence, wherein the first link 205 is vertically disposed, the third link 207 is horizontally disposed, the first link 205 is sealingly and slidably disposed in a through hole (not labeled in the figure), the third link 207 is slidably disposed in a sliding sleeve 208, the sliding sleeve 208 is fixed relative to the tray body 202, and when the third link 207 moves axially, the third link 207 drives the first link 205 to move vertically through the second link 206. For example, when link three 207 slides inward in the tray 202, link one 205 moves upward to jack the plug body 204, whereas link one 205 retracts.

As shown in fig. 3, in order to facilitate the retraction and return of the first link 205, a first spring 209 is sleeved outside the third link 207, the third link 207 has a flange, the first spring 209 is disposed between the flange and the sliding sleeve 208, and when the third link 207 slides towards the inside of the tray 202, the flange presses the first spring 209 to store elastic potential energy, which is converted into kinetic energy for returning the first link 205.

As shown in fig. 3, a pressure spring 210 is further disposed above the plug body 204, the pressure spring 210 is used for pressing the plug body 204 above the air outlet 203, meanwhile, the pressure spring 210 is further limited above the plug body 204 by a limiting frame 211, the limiting frame 211 is a cover body with a hollow periphery, the limiting frame 211 covers the plug body 204 and the pressure spring 210, and meanwhile, the limiting frame 211 is connected with the disc body 202.

As shown in fig. 3, a stepped hole is further provided on a surface of the disc 202 contacting the plug 204 for placing and limiting the plug 204, so as to prevent the plug 204 from sliding off the air outlet 203 when being jacked up.

As shown in fig. 2 and 3, the tray 202 is shown with a hole for receiving the link three 207, the hole is derived from a side wall of the tray 202 to form a receptacle 212, and a latch 321 may be provided to engage the receptacle 212 to push the link three 207 into the tray 202.

As shown in fig. 2, the feeding mechanism 300 includes a feeding tray 310 and a push rod 320, wherein the feeding tray 310 is used for containing powder, and the push rod 320 is connected to the feeding tray 310 to provide a driving force for the feeding tray 310 to move along the radial direction of the tray body 202, so as to push or pull the feeding tray 310 to or from the air outlet 203 of the tray body 202.

As shown in fig. 4, the push rod 320 has a protruding pin 321, and the pin 321 is matched with the socket 212, when the push rod 320 pushes the feeding tray 310 to the air outlet 203 of the tray body 202, the pin 321 will be matched and inserted into the socket 212 to push the connecting rod three 207 into the tray body 202, so that when the feeding tray 310 is butted with the tray body 202, the air outlet 203 is opened, and the air in the tray body 202 can enter the feeding tray 310.

More specifically, as shown in fig. 4, the push rod 320 is a telescopic structure, and includes a first rod 322 and a second rod 323, and the first rod 322 and the second rod 323 are nested and slide, for example, the first rod 322 is tubular, the second rod 323 is slidably embedded in the first rod 322, and an elastic member (not shown in the figure) is disposed inside the first rod 322 to maintain the relative return tendency of the first rod 322 and the second rod 323, and the elastic member may be a spring, which is used more commonly. The first rod 322 is directly connected with the feeding tray 310, the bolt 321 is arranged on the second rod 323, the bottom of the tray body 202 is correspondingly provided with a limiting structure, the limiting structure is used for interacting with the first rod 322 to limit the extreme position of the first rod 322 moving towards the center of the disc body 202, under the limiting condition, the position of the feeding tray 310 is also limited, namely when the first rod 322 stops moving after moving to the limiting structure, the feeding tray 310 is just positioned at the air outlet hole 203 of the tray body 202 and is butted, based on the situation, the movement of the first rod 322 and the second rod 323 is not completely finished, the second rod 323 can be continuously pressed into the first rod 322, during the process that the second rod 323 starts to press in relative to the first rod 322, the pin 321 enters the socket 212 and contacts the third connecting rod 207, the air outlet 203 is opened, thereby ensuring that the gas is discharged after being aligned, and improving the uniformity of the gas supplied from the gas outlet holes 203 to the feeding tray 310.

As shown in fig. 5 and 6, the structure of the feeding tray 310 is schematically illustrated. The feeding tray 310 is of a hollow shell structure, the top of the feeding tray 310 is provided with a feeding hole 311, the feeding hole 311 is annular and is distributed on the circumference of the top surface of the feeding tray 310, and the feeding hole 311 extends downwards to form a blanking channel. The center of the top of the feeding tray 310 is provided with an air tap 312, the air tap 312 is used for matching and butting with the air outlet hole 203, the air tap 312 is provided with an air passage which is axially communicated, the air tap 312 protrudes out of the top surface of the feeding tray 310 under the action of a second spring 313 in a normal state, the air tap 312 can be completely submerged below the top surface of the feeding tray 310 under the action of external force, the air tap 312 extends downwards into the air cavity 314, the air tap 312 is in sliding contact with a wall body forming the air cavity 314, a sealing ring is arranged on a sliding contact surface of the air cavity 314 to ensure air tightness, the air cavity 314 and an annular blanking channel are formed by being separated through an elastic sealing surface 315, namely, the air cavity 314 and the blanking channel are coaxially arranged, the blanking channel is located outside the air cavity 314, and the elastic sealing surface 315 is provided with an air outlet (not shown in the figure).

Fig. 5 is a schematic view of a state where the feeding tray 310 is not butted against the tray body 202, in which the elastic sealing surface 315 is in a contracted state and the air nozzles 312 are normally protruded; when the feeding tray 310 is pushed into the tray body 202, the top surface of the feeding tray 310 is tightly attached to the bottom surface of the tray body 202, the air nozzles 312 are pressed into the top surface of the feeding tray 310 when contacting the tray body 202, when the feeding tray 310 moves to the limit position, the air nozzles 312 are just coaxially matched with the air outlet holes 203, the air outlet holes 203 give way for the air nozzles 312, the air nozzles 312 are ejected again under the action of the second springs 313 and abut against the lower ends of the air outlet holes 203, and therefore air flow channels from the air outlet holes 203, the air nozzles 312 to the air cavity 314 are formed; with the opening of the air outlet 203, the air cavity 314 is inflated, and the elastic sealing surface 315 begins to expand and cling to the outer side wall of the blanking channel, so as to block the upper portion of the blanking channel, as shown in fig. 6, in this state, the air outlet on the elastic sealing surface 315 is exposed and faces the lower section of the blanking channel, and the air in the air cavity 314 is sprayed to the lower section of the blanking channel, when the lower section of the blanking channel stores powder, the air blows out the powder and scatters on the bottom of the tank body 100, and because the blanking channel is annular, the corresponding powder can be scattered to the bottom of the tank body 100 in a planar manner by the annular shape when being blown out.

As shown in fig. 5 and 6, the lower end of the blanking channel is provided with a U-shaped material storage section 316 and an inverted U-shaped material spraying section 317, the U-shaped material storage section 316 and the inverted U-shaped material spraying section 317 are horizontally arranged and connected, so that powder can be stored in the U-shaped material storage section 316, and after air pressure enters the U-shaped material storage section 316, the powder can be pressed into the inverted U-shaped material spraying section 317 and sprayed out through the inclined discharge port of the inverted U-shaped material spraying section 317.

The elastic sealing surface 315 is made of a material having elastic and sealing properties, such as HDPE film, latex, or the like.

As shown in fig. 2 and 7, the first rod 322 has a circular cross section, and the bottom surface of the corresponding disc 202 has a groove 213 engaged with the first rod 322, and the end of the groove 213 forms a stepped limiting surface 214. The groove 213 with the step limiting surface 214 is matched with the first rod 322 with the circular cross section, so that on one hand, the movement of the feeding plate 310 can be guided, the accurate movement track of the feeding plate 310 is ensured, on the other hand, the positioning effect is realized, and the feeding plate 310 is ensured to be accurately and accurately stopped at the air outlet hole 203. The cross-section of first rod 322 may also be other shapes, such as hexagonal, square, etc.

As shown in fig. 1, a telescopic driving machine, such as an air cylinder or an oil cylinder, is mounted on the outer circumferential surface of the tank 100, and the output end of the telescopic driving machine is fixedly connected with the second rod 323, so as to provide power for the whole feeding mechanism 300.

As shown in fig. 8, the tank 100 further has a distribution pipe 130 extending to the inside, the distribution pipe 130 extends to the moving path of the feeding tray 310 to quantitatively feed the powder to the feeding port 311, the discharge port of the distribution pipe 130 is also annular corresponding to the annular structure of the feeding port 311, and conventionally, the position of the distribution pipe 130 is set at the position where the feeding tray 310 retracts to the limit position.

As shown in fig. 8, in order to ensure that the powder is stacked after being sprinkled, a receiving plate 120 is disposed below the inside of the tank 100, the cross section of the receiving plate 120 is consistent with the inside of the tank 100, the receiving plate 120 has a fixed rotation axis, and the rotation axis is randomly and radially consistent with the inside of the tank 100, so that when a certain amount of powder is present on the receiving plate 120, the powder falls to the bottom of the tank 100 and is collected by rotating the receiving plate 120, and the mixing uniformity of the powder can be further improved during the falling process of the receiving plate 120. Usually, a motor 140 is installed outside the can body 100, an output shaft of the motor 140 is connected to the receiving plate 120, the receiving plate 120 is driven to turn over by the motor 140, and the motor 140 is preferably a servo motor.

The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto.

Claims

1. Dry powder production is with malleation air current that dashes mixes machine which characterized in that includes:

a tank (100), wherein the tank (100) is provided with a port (101) for introducing gas from the top;

the material distribution mechanism (200), the material distribution mechanism (200) is arranged in the tank body (100), the material distribution mechanism (200) is upwards communicated with the connector (101) to enable the interior to form a positive pressure state, and the bottom of the material distribution mechanism (200) is provided with an air outlet (203) capable of changing the positive pressure state through opening and closing; and

the powder feeding mechanism comprises a feeding mechanism (300), wherein the feeding mechanism (300) is lower than the lowest end of an air outlet (203), powder is loaded in the feeding mechanism (300), the feeding mechanism (300) is provided with a path with fixed reciprocating motion, and the feeding mechanism (300) moves to a terminal point of the path to trigger the air outlet (203) to be opened so as to transmit the positive pressure state into the feeding mechanism (300) and form airflow for blowing and scattering the powder.

2. The positive pressure air-blast mixer for dry powder production according to claim 1, wherein said feeding mechanisms (300) are provided in at least two sets, and different feeding mechanisms (300) reciprocate intermittently.

3. The positive-pressure air-blast mixer for dry powder production according to claim 1, wherein the distributing mechanism (200) has a disc body (202) disposed in the tank body (100), the air outlet (203) is disposed at the bottom of the disc body (202), a plug body (204) blocking the air outlet (203) and three connecting rods triggering the opening and closing of the plug body (204) are disposed in the disc body (202), the three connecting rods include a third connecting rod (207) horizontally extending to the outside of the disc body (202), a first connecting rod (205) vertically sliding to extend out of the inner bottom surface of the disc body (202) and jack up the plug body (204), and a second connecting rod (206) with two ends respectively hinged to the first connecting rod (205) and the third connecting rod (207), and the three connecting rods can convert the vertical axial movement of the first connecting rod (205) and the horizontal axial movement of the third connecting rod (207).

4. The positive pressure air blast mixer for dry powder production according to claim 3, wherein the top of the cock body (204) is provided with a compression spring (210) for restoring the cock body (204), and the connecting rod III (207) is sleeved with a spring I (209) for restoring the connecting rod III (207).

5. The positive pressure air-blast mixer for dry powder production according to claim 3, wherein the contact surface of the disc body (202) and the plug body (204) is provided with a stepped hole for limiting the plug body (204).

6. The positive pressure air-blast mixer for dry powder production according to claim 3, wherein said feeding mechanism (300) comprises a feeding tray (310) and a push rod (320), powder is stored in said feeding tray (310), said push rod (320) is connected to said feeding tray (310), and said push rod (320) has a pin (321) capable of contacting and pushing the connecting rod III (207) to move axially.

7. The positive-pressure air-blast mixer for dry powder production according to claim 6, wherein the push rod (320) comprises a first rod (322) and a second rod (323) which are telescopically engaged, an elastic member for restoring the elongation state is arranged between the first rod (322) and the second rod (323), the first rod (322) is connected with the feeding tray (310), the bolt (321) is arranged on the second rod (323), the bottom surface of the tray body (202) is provided with a groove (213) engaged with the first rod (322), and the tail end of the groove (213) forms a step limiting surface (214).

8. The positive pressure air-blast mixer for dry powder production according to claim 7, wherein when said first rod (322) contacts the step limiting surface (214), the pin (321) is not yet or just contacting the third connecting rod (207).

9. The positive-pressure air-blast mixer for dry powder production according to any one of claims 6 to 8, wherein the feeding tray (310) is a hollow shell, the top of the feeding tray (310) is provided with an annular feeding port (311), and the feeding port (311) extends downwards to form a blanking channel; the feeding plate is characterized in that an air nozzle (312) is arranged in the center of the top of the feeding plate (310), the air nozzle (312) protrudes out of the top surface of the feeding plate (310) under the action of a second spring (313) in a normal state, the air nozzle (312) extends downwards into an air cavity (314), the air cavity (314) and a blanking channel are formed in a separated mode through an elastic sealing surface (315), an air outlet is formed in the elastic sealing surface (315), and a sealed air flow channel is formed through an air outlet hole (203), the air nozzle (312), the air cavity (314), the air outlet and the lower section of the blanking channel when the air outlet hole (203) is opened.

10. The positive-pressure air-blast mixer for dry powder production according to claim 9, wherein the lower end of the blanking channel is provided with a U-shaped storage section (316) and an inverted U-shaped spraying section (317), the U-shaped storage section (316) and the inverted U-shaped spraying section (317) are horizontally arranged and connected, and the U-shaped spraying section (317) is provided with a downward inclined discharge port.