Powder bridge breaking and stirring device

Abstract

To provide a powder bridge breaking and agitating device.SOLUTION: A wiper holder is installed at a rotary arm 42 terminal, a wiper 41 is installed in the wiper holder, power is transmitted to a lateral direction transmission shaft and rotation is made to perform by driving the lateral direction transmission shaft, then the rotation of a vertical direction transmission shaft is interlocked through lateral direction and vertical direction bevel gears; thereby, an upper lid 4 and the wiper 41 arranged at the terminal of the rotary arm 42 are driven, advancement continues by a circular route in a hopper. Thereby, kinetic energy of the wiper 41 breaks attachment and connection force between powder granules, the powder continuously falls by the action of self weight, and smooth flow and discharge of the powder in a silo is maintained. The work environment of the device is filled with powder and powder dust, and by installing a protection mechanism of three layers, an influence on the transmission of the device due to the powder entering a power transmission section and causing abrasion of components is prevented, and stability and effectiveness of the invention is maintained during the whole operation.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a powder bridge breaking and stirring device.

Background Art

[0002] Various powders cause various difficulties in powder factories due to their specific physical properties, such as reactivity and adsorptivity. Natural phenomena such as powder adhesion, consolidation, brittleness, blockage, bridging, and segregation can all cause production stoppages in powder factories. Effectively solving these problems is a major challenge for system designers, manufacturers, and users. In modern times when production factories are moving towards larger scale, automation, and labor saving, whether powders can be smoothly transported is a more pressing issue for producers than quality problems. The powder bridge phenomenon (Powder plugging / bridging) is a phenomenon in which powders in a container form a bridge, and the adhesion and bonding force of powder particles generate a supporting force that balances the powder pressure from above at a certain layer inside the powder. In this phenomenon, static equilibrium is maintained even if there is no supporting force below that layer.

[0003] Among the various problems mentioned above, the occurrence of powder bridging in a hopper and the resulting production stoppage is one of the most common nuisances in the operation of powder factories. Effectively solving this problem is extremely important for the production efficiency of powder factories.

[0004] The present invention provides a powder bridge breaking and stirring device. In particular, the output of a gear motor is used to change the direction of power through a set of power transmission components and drive a wiper, thereby breaking the powder bridge by the wiper and promoting the smooth flow and discharge of powders in a silo. Furthermore, since the working environment of this device is filled with powders and dust, the device is equipped with first to third protection mechanisms. This reliably prevents the ingress of powder and prevents a decrease in transmission performance due to wear of power transmission components, and as a result, the present invention can maintain stability and effectiveness during operation.

[0005] Conventional measures to prevent bridging of powders and granules, and their drawbacks, are as follows:

[0006] Increasing the silo hopper angle: This method does not completely solve the powder bridging problem and has the disadvantage of reducing the silo's storage capacity.

[0007] Tapping: This method can cause significant damage to the structure of the storage tank and may also trigger a "flushing" phenomenon where the powder at the top flows out all at once. Therefore, its practical effectiveness is low.

[0008] High-pressure air injection: First, high-pressure air causes dust to scatter, raises the temperature of the work environment, and significantly increases the risk of dust explosions. Next, because compressed air is hot and humid, it can promote the solidification of powders and potentially cause changes in the quality of the powders. Furthermore, when discharging large volumes of air, the installation of a filter system becomes necessary, which increases the complexity of the work.

[0009] Vibrator: The shock and vibration caused by the operation of a vibrator can generate high temperatures and sparks, posing a risk of dust explosion. Furthermore, since a large portion of the vibrator's kinetic energy is absorbed by the storage tank, the damage to the tank structure becomes significant. Furthermore, vibration can have adverse effects on certain materials, sometimes causing them to become denser or leading to particle size separation (segregation) in powders. This could compromise the quality stability of the powder.

[0010] In the technology disclosed in Patent Document 1 (hereinafter, the reference numerals are part reference numerals in Patent Document 1), the inner ring 2 is installed between the upper body 1a and the lower body 1b. Between the upper body 1a, the lower body 1b, and the inner ring 2, steel balls 4 are placed instead of large bearings to support the inner ring. Furthermore, the reduction motor 13 drives the inner ring via the gear 10, causing it to rotate between the upper body 1a and the lower body 1b. The wiper holder 2b is fixed to the inner ring, and the wiper 3 is positioned inside the wiper holder. As the inner ring moves circumferentially within hopper B, it breaks down bridges in the powder particles inside the hopper, promoting the fall of the powder.

[0011] The application drawbacks of Patent Document 1 are as follows: To prevent powder from entering the mounting area of ​​the gear 10 inside the inner ring, a sealing ring 6 is installed between the upper body and the inner ring 2, and between the lower body and the inner ring 2, and an air blowing device is also used as an auxiliary device. However, the large gap between the inner ring 2 and the upper and lower bodies, as well as the large circumference of the inner ring, makes it difficult to equalize the pressure by air-blowing. These factors cause powder to seep into the mechanical structure of the inner ring through gaps during operation of the device, leading to wear on the inner ring 2 and gear 10, and ultimately resulting in damage to the device.

[0012] Furthermore, if powders with uneven particle sizes are introduced into a storage tank, segregation occurs. This results in an uneven particle size distribution during transportation and discharge, leading to uneven dissolution and reaction in subsequent processes. As a result, the commercial value of the final product may decrease. Furthermore, segregation becomes more pronounced when (1) the supply rate is slow, (2) the fluidity of the powder is high, and (3) the particle size distribution range is wide. Conventional countermeasures are limited, and segregation phenomena still cannot be completely prevented.

[0013] In view of the above, the inventors have conducted extensive research on further improving the bridge breaking device and effectively preventing the intrusion of powder into the internal mechanical structure. To solve these problems, we started the development and improvement process, aiming to achieve the optimal invention. After numerous tests and improvements, the present invention has been completed.

Prior Art Documents

Patent Documents

[0014]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0015] The prior art has various drawbacks.

Means for Solving the Problems

[0016] The present invention relates to a powder bridge breaking and stirring device for solving the above problems.

[0017] The powder bridge breaking and stirring device according to the present invention is a device installed at the outlet end of a silo. The powder bridge breaking and stirring device has a main body, a power transmission component, an upper cover, a lower cover, a wiper, and a gear motor. The main body is installed in an annular shape, thereby being connected and fixed under the silo. A powder passage is formed in the center, a gear box is installed at the center position of the main body, and connecting pipes are installed on both sides of the gear box and fixed to the main body. One of the interiors of the connecting pipes has a hollow tubular structure, and a power transmission component is installed inside. The interior of the other connecting pipe has a hollow tubular structure and is a high-pressure air passage. The upper cover is arranged corresponding to the top of the gear box and a wiper is installed. The gear motor is connected to the main body by a motor mount, connected to a lateral transmission shaft for transmission. When the lateral transmission shaft is driven to rotate, it interlocks the rotation of the vertical transmission shaft through lateral and vertical bevel gears, thus driving the upper cover. Moreover, the wiper placed at the end of the rotating arm advances in a circular route within the hopper. Thereby, the kinetic energy of the wiper destroys the adhesion and connection force between the powder particles, and the powder continuously falls due to its own gravity, thereby maintaining the fluidity of the powder in the silo and the smoothness during discharge.

[0018] In the present invention, through the arrangement of the vertical bevel gear and the lateral bevel gear of the power transmission components, the driving direction of the gear motor is transmitted according to the rotation direction, and the power is transmitted to the wiper to break the powder bridge. The overall installation and transmission structure of the present invention is simple, without vibration or noise during operation, not affected by the working temperature. Moreover, in addition to breaking the bridge by the slow movement of the wiper, it can prevent powder flying, ensuring the stability and safety during powder delivery.

[0019] Since the working environment of this device is full of powder and dust, it is a necessary consideration to effectively prevent the intrusion of powder so that the device is not worn or damaged. Therefore, the device is designed with the following three-layer protection mechanism to maintain safe and effective operation.

[0020] The first-layer protection mechanism is air blowing. When the transport system is operating, high-pressure air is blown into the center position of the gear box and blown out from the gap between the upper cover and the gear box, thereby forming a high-pressure area inside the gear box, preventing the intrusion of powder, improving the powder intrusion prevention ability of the present invention, maintaining the transmission state of each component of the present invention, preventing wear caused by powder intrusion, ensuring the smooth operation of the present invention, and as a result, significantly improving the service life. The second layer protection mechanism is a labyrinth seal. Even if the transport system is temporarily suspended and the device becomes surrounded by powder, or if the supply of high-pressure air is stopped, the uneven shape of the labyrinth structure prevents powder from entering the gap between the top cover and the gearbox. The labyrinth seal of this device has at least one lower labyrinth seal installed on the top ring surface of the gearbox, and a corresponding upper labyrinth seal installed on the bottom surface of the top cover. The top cover is installed to cover the top of the gearbox, and a labyrinth structure of corresponding bumps and grooves is formed between the upper and lower layers of the labyrinth seal. This prevents powder from entering the power transmission components through the gap between the upper and lower layers of the labyrinth seal, thereby improving the powder barrier effect of the present invention and further enhancing protective performance.

[0021] The third layer protection mechanism is a mechanical shaft seal, installed in front of the bearings of the lateral and longitudinal transmission shafts. This serves as the final line of defense against powder entering the gearbox, reliably and effectively blocking powder intrusion, thereby preventing it from entering the power transmission components and ensuring the effective and stable operation of the present invention. Furthermore, at least one transmission shaft bearing is installed between the longitudinal transmission shaft and the gearbox, or between the longitudinal transmission shaft and the lower cover, or at least one location on the transverse transmission shaft, with the bearings positioned at the front and rear ends of the transverse and longitudinal transmission shafts, and each transmission shaft bearing is equipped with a bearing seal.

[0022] Furthermore, the upper end of the top cover is set in a conical shape, and one side of the top cover extends to accommodate a rotating arm, with a wiper holder installed at the end of the rotating arm. The shape of the wiper holder allows the direction of the wiper to be fixed, so that the wiper does not become unbalanced or shake. Moreover, the wiper is assembled to move in accordance with the rotating arm, so that the wiper can be removed independently for cleaning or replacement.

[0023] The present invention further includes providing at least one contact on the outer surface of the main body and connecting a grounding wire to the contact, thereby enabling the discharge of static electricity generated by friction of the powder.

[0024] This device offers two mounting and fixing methods: one using a flange connection and the other using a clamp connection. This provides powder processing plants with flexible options to meet their individual operational needs. Under normal circumstances, stable installation is possible with flanges, and for special processes requiring frequent removal (such as cleaning and disinfection), a clamping method can be selected. Therefore, the structural arrangement of the present invention has high adaptability and improves convenience and efficiency during assembly and disassembly.

[0025] In one embodiment of the present invention, a stirrer for stirring powders and granules is configured, in which case a wiper is arranged as a stirring blade, and the stirring blade has a multi-layered assembly structure and has at least one assembly shaft, on which multiple blades are installed, and when multiple assembly shafts are arranged, the blade has a multi-layer structure and rotates by the drive of a gear motor. This causes the blades to generate downward thrust, agitating the powder while simultaneously assisting in its transport. Even with powders of uneven particle sizes, uniform and thorough agitation is possible, preventing segregation. Thus, the output quality of the powder is improved, and the quality and stability of the final product are enhanced. [Brief explanation of the drawing]

[0026] [Figure 1] This is a schematic three-dimensional diagram of the present invention. [Figure 2] This is a schematic diagram of the three-dimensional exploded view of the present invention. [Figure 3] This is a schematic diagram of the present invention from a different angle. [Figure 4] This is a schematic three-dimensional exploded view of the power transmission component and the top cover in the present invention. [Figure 5] This is a schematic cross-sectional view taken at position AA in Figure 1. [Figure 6] This diagram shows a cross-section and a schematic representation of the operating state of the present invention when installed in a silo. [Figure 7] This is an overhead view of the present invention. [Figure 8] This is a localized enlarged view of the present invention, and is a schematic local cross-sectional view showing the connection of the labyrinth seal, power transmission components, and top cover. [Figure 9] This is a schematic diagram showing a different embodiment of the present invention, in which a silo is connected using a quick-release structure. [Figure 10] This is a schematic diagram of a three-dimensional decomposition based on Figure 9. [Figure 11] This is a schematic diagram showing a wiper arranged as a stirring blade in another embodiment of the present invention. [Figure 12] This is a schematic diagram of a three-dimensional decomposition based on Figure 11. [Modes for carrying out the invention]

[0027] (One embodiment) To deepen your understanding and appreciation of this invention, we will describe in detail below several optimal embodiments of our inventors' technical means, along with drawings.

[0028] As shown in Figures 1 to 8, the powder bridge breaking and stirring device according to the present invention is a device installed at the outlet end 11 of the silo 1, and the powder bridge breaking and stirring device comprises a main body 2, a power transmission component 3, an upper cover, a lower cover, a wiper, and a gear motor.

[0029] The main body 2 is installed in an annular shape, and its structure has reinforcing ribs to increase structural strength while reducing weight. Its outer shape is designed to fit the outlet end 11 of the silo 1 and is connectable to it. As is well known, the silo 1 stores powder P, and after being discharged through the outlet end 11, the powder P is discharged through the main body 2. The main body 2 has a powder passage 21 in its central part, and the powder P is discharged through the powder passage 21. A first connecting tube 22 (Connecting Tube / Beam) and a second connecting tube 72 are installed on one side of the inner edge of the main body 2. The inside of the first connecting tube 22 has a hollow tubular structure and a power transmission component is installed inside, while the inside of the second connecting tube 72 has a hollow tubular structure and serves as a high-pressure air passage. The first connecting pipe 22 is installed at one end within the powder passage 21 so as to connect to a tubular gearbox 23, and the other end of the first connecting pipe 22 is connected to the outer surface of the main body 2, with a through hole 221 formed on its exterior. In a specific embodiment, the main body 2 is manufactured by precision casting of stainless steel, possessing high precision and strength, excellent corrosion resistance, and ease of manufacture and maintenance. The lower end of the main body 2 can be connected to other powder conveying equipment such as a rotary valve, which is used to supply powder P. However, this is merely an example and is not the only possible solution. As shown in Figures 1 to 8, the silo 1 is installed by attaching flanges 25 to the upper and lower side edges of the main body 2, thereby directly connecting and fixing it to the silo 1. The lower end is positioned to correspond to other powder transport devices and connected in a similar manner. In other embodiments, if frequent special treatments (such as cleaning or disinfection) are required, the pipe clamp 9 (Tri-Clamp; Pipe Clamp) can be used for quick assembly and disassembly, as shown in Figures 9 and 10, to facilitate cleaning and maintenance of the inside of the silo 1 or main body 2. This enhances the convenience and applicability of the present invention, allowing it to be adapted to various types of silo 1 and perform corresponding assembly / disassembly and cleaning / maintenance. A powder processing plant can select the connection method of the flange 25 or pipe clamp 9 of its production system according to its production characteristics. Therefore, the main body 2 is installed corresponding to the outlet end 11 of the silo 1, with a flange 25 or pipe clamp 29 selectively attached to its upper end, based on the piping connection type of the powder processing plant.

[0030] The power transmission component 3 includes a vertical transmission shaft 31, a vertical bevel gear 32, a horizontal bevel gear 33, and a horizontal transmission shaft 34. In this invention, "vertical direction" refers to the direction of the powder passage 21 of the main body 2. The vertical transmission shaft 31 is pivotally mounted through the gearbox 23, and the upper end of the vertical transmission shaft 31 is transmitted to the upper cover 4. The vertical transmission shaft 31 is dynamically connected to the vertical bevel gear 32, and the horizontal transmission shaft 34 is installed penetrating the first connecting pipe 22 and dynamically connected to the horizontal bevel gear 33, and the horizontal bevel gear 33 meshes with the vertical bevel gear 32. The gearbox 23 can accommodate the corresponding vertical bevel gear 32 and the horizontal bevel gear 33, and is arranged to have a reduction function. In one embodiment, the vertical bevel gear 32 is large and has many teeth, while the horizontal bevel gear 33 is small and has few teeth, thereby achieving the objectives of changing direction and reducing speed.

[0031] The top cover 4 is positioned to correspond to the upper end of the gearbox 23, so that the vertical transmission shaft 31 drives the top cover 4 to rotate, and a wiper 41 that extends to the upper end of the main body 2 is installed on the top cover 4. Regarding the installation of the wiper 41, a rotating arm 42 (Arm) is extended and installed on one side of the top cover 4, and a wiper holder is attached to the end of the rotating arm 42. -47 Install it. Wiper holder -47 The shape allows the direction of the wiper 41 to be fixed, so the wiper does not become uneven or shake, and the wiper 41 is also attached to the wiper holder. -47 It can be mounted directly or movably, so that the wiper 41 is attached to the wiper holder. -47 Take it out Shisei It can be cleaned or replaced. The wiper 41 is installed at an angle to conform to the contour of silo 1, and in combination with the aforementioned installation, the wiper 41 reliably conforms to the contour of silo 1 and can adapt to the various silo hopper angles of each powder processing plant. Through the mounting arrangement between the wiper 41 and the rotating arm 42, a wiper 41 of an appropriate length or incline can be selected according to the type of silo 1 or the pipe diameter, and it can be directly assembled in conjunction with the rotating arm 42 or fixed with screws.

[0032] In one embodiment, the gear motor 5 is arranged as a reduction motor and provides power. This arrangement allows the gear motor 5 to deliver power accordingly and is positioned to rotate on the lateral transmission shaft 34 within the first connecting pipe 22. As described above, the vertical bevel gear 32 is used to change direction and reduce the transmission speed, which in turn rotates the vertical transmission shaft 31 and drives the top cover 4. In this way, the top cover 4 is linked to the wiper 41 and rotates slowly in a circular path, breaking up bridging phenomena in the powder P, stirring the powder P, or assisting in its transport. Preferably, as shown in Figure 6, the wiper 41 is inserted to a certain depth in the silo 1, and when force is transmitted, it rotates along the wall surface of the silo 1, effectively breaking the bridging phenomenon of the powder P.

[0033] As a result, as shown in Figures 5 to 7, regarding the installation of the structure of the present invention, the vertical transmission shaft 31, vertical bevel gear 32, and lateral bevel gear 33 of the power transmission component 3 are mainly arranged inside the gearbox 23, and power transmission to the top cover 4 and wiper 41 is performed by a mechanical method, thus simplifying power transmission, eliminating the need for a complex transmission system, and preventing vibration and noise during operation. The aforementioned arrangement of the reduction gear allows the powder to move while rotating along a circumferential path within the silo 1, and its kinetic energy can effectively break up bridges (or static equilibrium) of powder P within the silo 1 and the powder passage 21 of the main body 2. At the same time, if the wiper 41 rotates too fast, the powder P may be blown around, potentially creating a dust explosion hazard. Therefore, the wiper 41 rotates slowly to prevent the powder P from being scattered steadily. However, since the rotational speed supplied by the gear motor 5 is not sufficient to achieve a sufficiently low speed, the vertical bevel gear 32 and the horizontal bevel gear 33 are used to further reduce the speed and achieve a smoother movement. This prevents the powder P from scattering, and the powder P passes through the main body 2 and is discharged stably.

[0034] In one embodiment of the present invention, the powder P generates static electricity due to contact friction between particles, which is an important preventative measure in the relevant work area to prevent the risk of dust explosion. Therefore, in this invention, at least one contact 24 is installed on the main body 2, and a grounding wire 241 is connected to the contact 24. Through the grounding wire 24, static electricity accumulated by the friction of the powder P is discharged, preventing static discharge sparks caused by the accumulation of static electricity, and ensuring safety during operation.

[0035] Regarding the assembly arrangement of the power transmission component 3, the top cover 4 is located at the upper end of the gearbox 23, as shown in Figures 5 and 6. To prevent the powder P from accumulating on the top lid 4, the upper end of the top lid 4 is preferably set to be conical. As a result, the powder P does not accumulate on the conical surface but remains on the flat surface, so the top lid 4 conforms to the hygiene standards of the food processing process. The conical arrangement guides the powder P and prevents convection of the powder P. Furthermore, the cross-sectional views shown in Figures 5 and 6 illustrate the transmission arrangement of the present invention, with a cross-sectional view taken at the position of the first connecting pipe 22. Therefore, although the first connecting pipe 22 appears to obstruct the cross-sectional view of the main body 2 powder passage 21, in substance, the first connecting pipe 22 and the gearbox 23 do not completely block the powder passage 21, and as shown in Figure 7, the powder P is discharged from the powder passage 21. Regarding the installation of the lateral transmission shaft 34, it is designed to be supported and positioned by the first connecting pipe 22, with one end being dynamically connected to the gear motor 5, and furthermore, by installing a gear motor holder 51, it is connected and installed correspondingly between the main body 2 and the gear motor 5. As a result, the gear motor holder 51 is positioned between the main body 2 and the gear motor 5, and the lateral transmission shaft 34 is installed in conjunction with the gear motor holder 51. It is supported and rotatably positioned through a lateral transmission shaft bearing 341. Furthermore, the lateral transmission shaft 34 is directly assembled or fixed to the lateral bevel gear 33, allowing it to synchronize and interlock with the rotation of the lateral bevel gear 33.

[0036] Regarding the transmission arrangement of the vertical transmission shaft 31, in one embodiment, an opening 231 is provided at the lower end of the gearbox 23 so that the vertical transmission shaft 31 can pass through the gearbox 23 and rotate and position smoothly. As a result, the vertical transmission shaft 31 and the vertical bevel gear 32 can be assembled from the opening 231 at the lower end, and by installing the lower cover 35, the opening 231 at the lower end of the gearbox 23 is sealed, and the lower cover 35 is installed correspondingly to the vertical transmission shaft 31. Furthermore, in one embodiment, a key groove 321 is installed in the vertical bevel gear 32, and the vertical transmission shaft 31 is dynamically connected to the key groove of the vertical bevel gear 32 by installing a key body 312 on it. Furthermore, a threaded portion 313 is installed at the upper end of the vertical transmission shaft 31 and assembled in conjunction with the upper cover 4. A transmission member 314 is installed at the upper end of the vertical transmission shaft 31, and a screw groove 43 corresponding to the screw threads of the vertical transmission shaft 31 is installed at the lower end of the top cover 4. A transmission section 431 corresponding to the transmission member 314 is installed inside the screw groove 43. As a result, the vertical transmission shaft 31 rotates synchronously with the upper cover 4, and a larger and more stable torque is transmitted through the vertical bevel gear 32, rotating the vertical transmission shaft 31 and linking it to the rotation of the upper cover 4, thereby improving the stability of power transmission. Preferably, in order to ensure that the vertical transmission shaft 31 rotates smoothly and to minimize the influence of the powder P's pressure on rotation, at least one vertical transmission shaft bearing 311 is installed between the vertical transmission shaft 31 and the gearbox 23, or between the vertical transmission shaft 31 and the lower cover 35. Preferably, by installing a pair of vertical transmission shaft bearings 311 at the upper and lower ends of the vertical transmission shaft 31, the vertical transmission shaft bearings 311 can be supported while simultaneously ensuring smoothness and effectiveness during rotation.

[0037] Furthermore, as shown in Figure 6, when the present invention is used, it is installed at the outlet end 11 of the silo 1, so the powder P flows into the powder passage 21 of the main body 2 through the outlet end 11. As described above, the present invention transmits power 4 to the top cover via the lateral transmission shaft 34, lateral bevel gear 33, vertical bevel gear 32, and vertical transmission shaft 31 in sequence by the drive of the gear motor 5, thereby coordinating the rotation of the wiper 41. During this process, the powder passage 21 of the main body 2 is filled with powder P. Depending on the type of powder P, some particles may be extremely small and could enter the mechanism, potentially causing malfunctions or wear. Therefore, the present invention incorporates appropriate protective measures to prevent the intrusion of powder P.

[0038] Since the top cover 4 is rotatable within the gearbox 23, there is no contact area between the two. With the structure of the present invention, there is only a minute gap between the upper end of the gearbox 23 and the top cover 4, and there is no concern about intrusion into other parts. To prevent powder P from entering through this gap, in one embodiment, the entire top cover 4 is placed over the upper end of the gearbox 23 to shield it, or a sealed bearing is placed between them.

[0039] This invention features a three-layer powder intrusion prevention mechanism.

[0040] The first protective mechanism is an air purging device 7, which has a high-pressure air pipe connector 71 installed on one side of the inner edge of the main body 2. In one embodiment, the high-pressure air pipe connector 71 is parallel to the first connecting pipe 22, and one end of the high-pressure air pipe connector 71 communicates with the gearbox 23, while the other end is located on the outer ring surface of the main body 2. As a result, the high-pressure air pipe connector 71 is externally attached to the overcompressed air source (not shown) as shown in Figures 5 and 6, and high-pressure gas is supplied into the gearbox 23 through the high-pressure air pipe connector 71, creating a positive pressure zone within the gearbox 23. The gap between the top cover 4 and the gearbox 23 is an opening through which powder and granular material can enter, which poses hygiene risks and bearing damage risks. The installation of the air purging device 7 prevents powder and granular material from entering the opening. A cross-shaped hole 315 is installed on the vertical transmission shaft 31 relative to the height of the air purging device 7, and another cross-shaped hole 316 is installed at the top relative to the opening position. Furthermore, there is a straight hole 317 between the cross-shaped holes 316 and 315 at both the upper and lower ends, which are interconnected. Thus, as shown in Figures 5 and 8, the high-pressure air enters the upper cross-shaped hole 316 through the lower cross-shaped hole 315 and the straight hole 317, and is ejected from the gap in the labyrinth seal 6, blocking the entry of the powder P into the gearbox 23 by high-pressure air pressure. This provides a first layer of protection, maintains the transmission state of each component of the present invention, protects against wear caused by the intrusion of powder P, ensures smooth operation of the present invention, and significantly extends its service life.

[0041] The second layer protection mechanism includes a labyrinth seal 6 and at least one labyrinth seal lower layer 61 installed at the top ring surface of the gearbox 23. At the lower end of the top cover 4, a labyrinth seal upper layer 62 corresponding to the labyrinth seal lower layer 61 is installed, and these are directly formed by the gearbox 23 or the top cover 4, respectively. Furthermore, the top cover 4 is installed to cover the upper end of the gearbox 23, thereby stopping the powder P through the upper layer 62 of the labyrinth seal and the lower layer 61 of the labyrinth seal, making it difficult for the powder P to enter or get stuck between the gearbox 23 and the top cover. Furthermore, preferably, the labyrinth seal 6 has a corresponding arrangement of interlocking labyrinth seal structures between the upper labyrinth seal layer 62 and the lower labyrinth seal layer 61. As shown in Figures 2, 6, and 8, the labyrinth seal upper layer 62 is installed in an annular manner on the top ring surface of the gearbox 23, and is installed as a sawtooth-type tooth groove with an uneven surface. The lower layer 61 of the labyrinth seal, which is installed at the lower end of the upper cover 4, corresponds to the uneven contour of the upper layer 62 of the labyrinth seal, and is extremely close to it, in accordance with the uneven tooth surface. As shown in Figure 8, this arrangement creates a labyrinthine gap between the upper layer 62 and the lower layer 61 of the labyrinth seal. Even if powder P manages to penetrate, it will be blocked or retained by the uneven surfaces of the upper layer 62 or lower layer 61 of the labyrinth seal, significantly increasing the difficulty of penetration. This interferes with the powder P, making the probability of powder P entering very low. Thus, the present invention can ensure effective power transmission and improve efficiency and stability during operation without being affected by wear or sticking due to the intrusion of powder P.

[0042] The third layer protection mechanism is a mechanical shaft seal, such as a bearing seal 8, which is installed at one end of the gearbox 23 of the longitudinal transmission shaft 31. This creates a sealed contact between the longitudinal transmission shaft 31 and the gearbox 23, forming the final protective measure, which, through a physical mechanism, can reliably and effectively block the powder P. This prevents powder P from entering the power transmission component 3, ensuring the effective and stable operation of the present invention.

[0043] In another embodiment, as shown in Figures 11 and 12, the wiper 41 can be replaced with a blender blade 41' for the convenience of assisting in the stirring and transport of the powder P. Furthermore, the stirring blade 41' has at least one assembly shaft 44 and is installed vertically upright on the upper end of the top cover 4. Each assembly shaft 44 is fitted with multiple blades 45. In one embodiment, the assembly shaft 44 can be fixed to the top cover 4 using a fixed connection method, and the top cover 4 has a fixed connection hole 46 at its upper end. As described above, power is transmitted to the top cover 4 through the drive of the gear motor 5, sequentially via the lateral transmission shaft 34, lateral bevel gear 33, vertical bevel gear 32, and vertical transmission shaft 31, thereby coordinating the rotation of the stirring blade 41' and stirring the powder P by the blade 45. Specifically, since the stirring blades 41' can be arranged in a multi-layer assembly type, in this embodiment, multiple assembly shafts 44 are arranged to form a multi-layer blade 45 arrangement. Different assembly shafts 44 are fixedly connected to each other through square screw threads, and the direction of the screw threads and the direction of rotation of the blade 45 are opposite. When the blades 45 receive power, they directly agitate the powder P inside the silo 1, and the blades 45 in different layers have the same or different lengths or sizes.

[0044] In a specific embodiment, the assembly shaft 44 is a cylindrical rod, with a screw hole 441 for fixed connection at its upper end and a screw column 442 corresponding to the screw hole 441 at its lower end. As a result, the different assembly shafts 44 are screwed into each other and fixedly connected through the screw holes 441 and screw columns 442. The uppermost assembly shaft 44 is fixed through a rounded screw 443, and preferably, a small outer diameter protrusion 444 is installed above the screw hole position on the assembly shaft 44. The outer edge of the convex fence 444 is installed in an octagonal shape. Each blade 45 is placed in a blade holder 451, and the blade holder 451 is provided with a hole 452 corresponding to the protrusion 444. The borehole 452 is also octagonal in shape and is assembled in accordance with the assembly shaft 44, and is pressed and fixed in the axial direction by the assembly between the assembly shafts 44. In one embodiment, the blades 45 are arranged in a cross shape, with two opposing blades extended laterally and the other blade 45 facing the opposite direction being raised upward in a V-shape. Each blade 45 has a cutting edge angle of 45 degrees, which generates stirring and downward thrust when rotating. However, this is merely an example and not the only configuration; the user can adjust the cutting edge angle of each blade 45 as needed. Furthermore, the arrangement of the blade holder 451 is merely an example; therefore, in this embodiment, it corresponds to the shape of the octagonal cavity 452, with each interior angle being 45 degrees, and the blade 45 is positioned according to the user's needs.

[0045] This setup allows for uniform and thorough mixing of powder P when it is a granular material with uneven particle size, preventing segregation and improving the quality of powder P delivery, thereby enhancing the quality and stability of the final product.

[0046] As is clear from the above explanation, the technical means disclosed in the present invention can effectively solve the problems of the conventional powder bridging phenomenon and achieve the expected objectives and effects. Furthermore, since this invention has not been described in any publication prior to the filing of the application, has not been publicly used, and possesses future inventiveness, it undoubtedly qualifies as an "invention" under patent law. Therefore, this application is filed in accordance with the law, and I sincerely request that your office carefully examine it and grant me permission to grant this invention patent.

[0047] The above description represents only some preferred embodiments of the present invention and does not limit the scope of the invention thereto. All equivalent changes and modifications made based on the claims and detailed description of the invention of this invention shall be included within the scope of the patent of this invention. [Explanation of Symbols]

[0048] 1 silo, 11 outlet end, 2 Main unit, 21 Powder passage, 22 First Liaison Officer, 221 through hole; 23 gearbox, 231 aperture, 24 contacts, 241 Ground wire, 25 flanges, 3 Power transmission components, 31. Longitudinal transmission shaft, 311 Longitudinal transmission shaft bearing, 312 key bodies, 313 Screw thread section, 314 Transmission members, 315, 316 cruciform hole, 317 straight hole, 32. Vertical bevel gear, 321 Key tank, 33 Lateral bevel gear, 34 Lateral transmission shaft, 341 Lateral transmission shaft bearing, 35 Lower lid; 351 Tightly fixed screw column, 4 Top lid; 41 Wiper, 41' stirring blade, 42 rotating arms, 43 Screw slots, 431 Transmission section, 44 Assembly shafts, 441 screw holes, 442 Screw-type posts, 443 yen top screw, 444 Convex fence, 45 blades, 451 Blade holder, 452 Kong-dong, 46 fixed connection holes, 47 Wiper holder 5 gear motor, 51 Gear motor holder, 6 Labyrinth Seal, 61 Labyrinth Seal Lower Level, 62 Labyrinth Seal Upper Layer, 7. Air purging device, 71 High-pressure air pipe connector, 72 Second connecting pipe, 8 bearing seals, 9 pipe clamps, P powder.

Claims

1. A powder bridge breaking and stirring device, installed at the outlet end of a silo, comprising a main body, power transmission components, an upper cover, a lower cover, a wiper, and a gear motor, The main body is installed in an annular shape, thereby forming a powder passage in the center, and a gearbox is installed at the center of the main body. Opposite first and second connecting pipes are installed on the inner edge of the main body, fixing the gearbox at the center of the main body. The first connecting pipe has a hollow tubular structure and houses the mechanical transmission structure, and the second connecting pipe also has a hollow tubular structure and serves as a passage for compressed air. The power transmission component includes a vertical transmission shaft, a vertical bevel gear, a horizontal bevel gear, and a horizontal transmission shaft. The vertical transmission shaft passes through the gearbox and is connected to the top cover for transmission. The vertical transmission shaft is dynamically connected to the vertical bevel gear. The horizontal transmission shaft is installed passing through the connecting pipe and is dynamically connected to the horizontal bevel gear, and the horizontal bevel gear meshes with the vertical bevel gear. The aforementioned top cover is installed corresponding to the upper end of the gearbox, and a rotating arm is provided on the top cover. A wiper holder is installed at the tip of the rotating arm, and the wiper is held and attached by the wiper holder, and can be removed for cleaning or replacement. The gear motor is connected to the lateral transmission shaft to transmit power, and when it transmits power to drive the rotation of the lateral transmission shaft, it also transmits power to the rotation of the vertical transmission shaft through the lateral and vertical bevel gears, thereby rotating the top cover, transmitting power to the wiper, and performing a rotary wiper motion. The gear motor holder is connected and installed between the main body and the gear motor, and the lateral transmission shaft is installed within the gear motor holder. Characterized by, Powder bridge breaking and stirring device.

2. The powder bridge breaking and stirring device further comprises a labyrinth seal, with at least one lower labyrinth seal installed at the apical ring surface of the gearbox, and an upper labyrinth seal corresponding to the lower labyrinth seal installed at the lower end of the top cover, and the top cover is installed to cover the gearbox at the upper end position. It is installed between the upper and lower layers of the labyrinth seal as a corresponding labyrinth-like uneven structure. Characterized by, The powder bridge breaking and stirring apparatus according to claim 1.

3. The aforementioned powder bridge breaking and stirring device further comprises an air purging device. The air purging device has a high-pressure air pipe connector installed on one side of the inner edge of the main body, one end of which is in communication with the gearbox, and through the high-pressure air pipe connector, it sends positive pressure into the gearbox. Characterized by, The powder bridge breaking and stirring apparatus according to claim 1.

4. The powder bridge breaking and stirring device further has a lower cover, which is installed closed and corresponding to the lower end position of the gearbox, and the lower cover is installed corresponding to the vertical transmission shaft. Characterized by, A powder bridge breaking and stirring apparatus according to any one of claims 1 to 3.

5. At least one transmission shaft bearing is installed between the vertical transmission shaft and the gearbox, or between the vertical transmission shaft and the lower cover, and at least one location on the horizontal transmission shaft. Characterized by, The powder bridge breaking and stirring apparatus according to claim 4.

6. The aforementioned powder bridge breaking and stirring device further includes bearing seals, and bearing seals are installed on all of the transmission shaft bearings. Characterized by, The powder bridge breaking and stirring apparatus according to claim 5.

7. The upper end of the aforementioned top cover is installed in a conical shape. Characterized by, A powder bridge breaking and stirring apparatus according to any one of claims 1 to 3.

8. A flange or pipe clamp can be selectively used at the upper end of the main body and attached to the outlet end of the silo. Characterized by, A powder bridge breaking and stirring apparatus according to any one of claims 1 to 3.

9. At least one contact point 24 is further installed on the outer surface of the main body, and a grounding wire is connected to the contact point to discharge static electricity accumulated by friction of the powder and prevent static discharge sparks caused by the accumulation of static electricity. Characterized by, A powder bridge breaking and stirring apparatus according to any one of claims 1 to 3.

10. The wiper is a stirring blade, and the stirring blade has at least one assembly shaft, and each assembly shaft is fitted with multiple blades. Characterized by, A powder bridge breaking and stirring apparatus according to any one of claims 1 to 3.

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