Powder bridging destroying device

Abstract

The invention provides a powder bridging destroying device, which is used for destroying powder bridging in a silo and is also used as an auxiliary device for discharging powder for the silo, and comprises a body, a power transmission component, an upper cover, a lower cover, a shifting knife and a gear motor, the body is annularly arranged and is connected and fixedly held below a silo, a powder channel is formed in the middle of the body, a gear box is arranged in the center of the body, and two sides of the gear box are respectively provided with a communicating pipe which is connected and fixedly held with the body; the interior of the communicating pipe is of a hollow tubular structure, and a power transmission assembly is arranged in the communicating pipe; the interior of the second communicating pipe is of a hollow tubular structure and is a high-pressure air channel; the upper cover is correspondingly located at the top end of the gearbox and structurally provided with a rotating arm, a shifting knife holder is arranged at the tail end of the rotating arm, and a shifting knife is arranged in the shifting knife holder.

Description

Technical Field

[0001] Each type of powder, with its unique physical properties, such as reactivity and adsorption, presents varying degrees of difficulty for powder processing plants. Naturally occurring phenomena such as adhesion, consolidation, brittleness, occlusion, bridging, and segregation can all potentially disrupt production in a powder processing plant. Effectively addressing these issues presents significant challenges for system designers, manufacturers, and users alike. In today's world where production plants are increasingly focused on large-scale, automated, and labor-saving processes, the ability to smoothly convey powders is a more pressing concern for manufacturers than quality.

[0002] Powder bridging phenomenon: The powder bridging phenomenon in the container is caused by the adhesion and bonding force of the powder particles, which generates a supporting force in a certain layer within the powder that is balanced with the pressure of the powder above it. Even if the supporting force below this layer is zero, the static equilibrium is maintained.

[0003] Among the many aforementioned issues, powder bridging within the hopper, which causes production halts, is the most common problem encountered in powder plant operations. Effectively resolving this issue is crucial to maintaining production efficiency in powder plants.

[0004] The present invention provides a powder bridge breaking device, specifically a device that converts the power output by a gear motor through a set of power transmission components to drive a blade, thereby breaking powder bridges with the blade, thereby promoting the flow of powder in a silo and smoothing the discharge process. Moreover, the working environment of this device is filled with powder and dust. The device is provided with first to third protection mechanisms to effectively prevent powder intrusion, which may cause wear of the power transmission components and thus affect their transmission, thereby maintaining the stability and effectiveness of the present invention during operation. Background Art

[0005] Current solutions to powder-particle bridging and their shortcomings.

[0006] Increasing the silo hopper angle: This method cannot completely solve the powder bridging problem, and it reduces the storage space of the silo.

[0007] Tapping: This method is highly destructive to the tank structure and may cause the powder above to flow. The practical effect of this method is low.

[0008] High-pressure air injection: The primary concern is that high-pressure air causes dust to fly and raises the ambient temperature, dramatically increasing the risk of dust explosions. Secondly, the high temperature and moisture content of compressed air can cause powder consolidation and alter its quality. Furthermore, exhausting the large volume of incoming air requires filtration, adding to operational complexity.

[0009] Vibrators: The impact and shaking of vibrators can generate high temperatures and even sparks, posing a potential risk of dust explosions. Most of the vibrator's kinetic energy is absorbed by the storage tank, causing significant damage to the tank structure. Vibration can also have the opposite effect on some materials, causing them to become denser or causing particle size segregation, which can negatively impact powder quality stability.

[0010] For example, European patent application EP2407397A1 (hereinafter referred to as the component symbol of the patent application) employs an inner ring 2 positioned between an upper body 1a and a lower body 1b. A ring of steel balls 4 replaces a large bearing between the upper and lower bodies 1a, 1b and the inner ring 2 to support the inner ring. A reduction motor 13 drives the inner ring through a gear 10 to rotate between the upper and lower bodies 1a, 1b. A blade holder 2b is fixed to the inner ring, and a blade 3 is located within the holder. As the inner ring moves around the inner circumference of a hopper B, it breaks the bridges between the powder and granules in the hopper, causing the powder to fall.

[0011] The case has the following omissions.

[0012] Although sealing rings 6 are installed between the upper body and inner ring 2, and between the lower body and inner ring 2, and air purge is used to prevent powder from entering the inner ring where gear 10 is located, the gaps between the inner ring 2 and the upper and lower bodies are too large. Furthermore, the large circumference of the inner ring prevents the air purge from achieving uniform pressure. Consequently, during operation, powder can penetrate the inner ring's mechanical structure through these gaps, causing wear on the inner ring 2 and gear 10, leading to damage.

[0013] In view of this, the inventors further improved the bridge destruction device and the method for effectively preventing powder from invading the interior of the mechanical structure. Summary of the Invention

[0014] The purpose of the present invention is to solve the above problems. In order to achieve the above purpose, a powder bridge breaking device is provided, which is used to be set at the outlet end of a silo, and the powder bridge breaking device comprises: a body, a power transmission component, an upper cover, a lower cover, a knife and a gear motor; the body is arranged in a ring shape, so as to be connected and fixed under the silo, and a powder channel is formed in the middle thereof, a gear box is arranged at the center of the body, and connecting pipes are arranged on both sides of the gear box to connect and fix with the body; one of the connecting pipes is a hollow tubular structure inside, with a built-in power transmission component, and the second connecting pipe is a hollow tubular structure inside. The structure is a high-pressure air channel; the upper cover is located at the top of the gear box and is provided with a shifting knife; the gear motor is connected to the motor base and the body, and is correspondingly connected to the horizontal transmission shaft to drive the horizontal transmission shaft to rotate. The horizontal and longitudinal bevel gears drive the longitudinal transmission shaft to rotate, thereby driving the upper cover and the shifting knife located at the end of the rotary arm to continuously advance in a circular path in the hopper; thereby, the kinetic energy of the shifting knife destroys the adhesion and bonding force between the powder particles, and the powder continues to fall under the action of its own gravity, so as to maintain the flow of powder in the silo and the smoothness during unloading.

[0015] The present invention utilizes the configuration of the longitudinal bevel gear and the transverse bevel gear of the power transmission assembly to allow the driving direction of the gear motor to be controlled by the rotational transmission, while still providing power transmission to the paddle to break up powder bridges. The present invention has a simple overall configuration and transmission structure, does not generate vibration or noise during operation, and does not affect the operating temperature. The slow movement of the paddle not only breaks up the bridges but also prevents powder from flying, thereby ensuring stability and safety during powder output.

[0016] The working environment of this device is filled with powder and dust. It is necessary to effectively prevent the intrusion of powder to ensure that the device is not damaged by abrasion. To this end, this device is designed with the following three-layer protection mechanism to maintain safe and effective operation.

[0017] The first layer of protection is air purge. When the conveying system is in operation, high-pressure air is blown into the center of the gearbox and out through the gap between the upper cover and the gearbox, forming a high-pressure area inside the gearbox. This can block the intrusion of powder, thereby enhancing the protection of the present invention against powder intrusion, helping to maintain the transmission state of the various components of the present invention, and preventing wear caused by powder intrusion, thereby ensuring smooth operation of the present invention and significantly extending its service life.

[0018] The second layer of protection mechanism is a labyrinth seal. When the conveying system suspends operation, the device may be surrounded by powder, and the high-pressure air supply may stop at this time. The labyrinth concave-convex shape of this area can prevent the powder from penetrating into the gap between the upper cover and the gear box. The labyrinth seal of this device is at least one labyrinth seal lower layer arranged at the top ring surface of the gear box, and the bottom surface of the upper cover is provided with a labyrinth seal upper layer corresponding to the labyrinth seal lower layer, and the upper cover is correspondingly covered at the top of the gear box. The labyrinth seal is a labyrinth seal upper layer and a labyrinth seal lower layer, with concave-convex features corresponding to each other, making it difficult for powder to effectively pass through the gap between the labyrinth seal upper layer and the labyrinth seal lower layer and invade the power transmission component, thereby effectively improving the powder shielding effect of the present invention and further improving its protectiveness.

[0019] The third layer of protection is a mechanical seal, installed in front of the bearings of the transverse and longitudinal drive shafts. This is the lowest line of defense to prevent powder from invading the gearbox, effectively blocking powder from invading the power transmission components, thereby ensuring the effective and stable operation of the present invention.

[0020] In addition, at least one transmission shaft bearing is provided between the longitudinal transmission shaft and the gear box, or between the longitudinal transmission shaft and the lower cover, and at least one of the transverse transmission shafts; the bearings are located at the front and rear ends of the transverse and longitudinal transmission shafts, and each transmission shaft bearing is equipped with a bearing seal.

[0021] Furthermore, the top of the upper cover is conical, and a rotary arm is extended from one side of the upper cover, and a knife shifting seat is set at the end of the rotary arm. The shape of the knife shifting seat can fix the direction of the knife shifting so that the knife shifting does not swing, and the corresponding movable group of the knife shifting is connected to the rotary arm, so that the knife shifting can be taken out separately for cleaning or replacement.

[0022] Furthermore, the present invention further provides at least one contact on the outer surface of the main body, and the contact is connected to a ground wire to conduct static electricity generated by powder friction.

[0023] Furthermore, the device offers two mounting options: flange connection and tube bundle connection. This provides powder factories with flexible options to meet diverse operational needs. While flanges provide secure mounting in general situations, tube bundles can be used for mounting when frequent disassembly is required for specialized processes (e.g., cleaning or sterilization). This structural configuration offers high adaptability and enhances convenience and efficiency during disassembly. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a three-dimensional schematic diagram of the present invention. Figure 2 It is a three-dimensional exploded schematic diagram of the present invention. Figure 3 It is a schematic exploded perspective view of the present invention from another perspective. Figure 4 It is a three-dimensional exploded schematic diagram of the power transmission component and the upper cover of the present invention. Figure 5 It is a schematic cross-sectional view at position A-A in Figure 1. Figure 6 The figure is a cross-sectional view and a schematic diagram of the present invention when installed in a silo. Figure 7 It is a schematic top view of the present invention. Figure 8 The diagram is a partial cross-sectional view of a part of the present invention, which is partially enlarged to show the assembly of the labyrinth seal, the power transmission component and the upper cover. Figure 9 This is a perspective diagram of another embodiment of the present invention, which uses a quick-release structure to assemble with a silo. Figure 10 It is a three-dimensional decomposition diagram based on Figure 9. Explanation of symbols 1: Silo 11:Export end 2: Ontology 21: Powder channel 22: Unicom pipe 221:Through hole 23: Gearbox 231: Opening 24:Contact 241: Ground wire 25: Flange 3: Power transmission components 31: Longitudinal drive shaft 311: Longitudinal transmission shaft bearing 32: Longitudinal bevel gear 33: Transverse bevel gear 34: Transverse drive shaft 341: Transverse transmission shaft bearing 35: Lower cover 351: Locking screw 4: Upper cover 41: Draw the knife 42: spiral arm 5: Gear motor 51: Gear motor seat 6: Labyrinth seal 61: Labyrinth seal lower layer 62: Labyrinth seal upper layer 7: Air cleaning device 71: High-pressure air pipe connector 72: Second Unicom pipe 8: Bearing seal 9: Discipline P: Powder DETAILED DESCRIPTION

[0024] The inventor provides several preferred embodiments with reference to the drawings for detailed description below.

[0025] Please see first Figures 1 to 8 As shown, the present invention provides a powder bridge breaking device, which is used to be arranged at an outlet end 11 of a silo 1. The powder bridge breaking device comprises:

[0026] A body 2 is provided in an annular shape, and its structure has reinforcing ribs to improve structural strength while reducing weight. Its appearance can be configured to adapt to the outlet end 11 of the silo 1 and can be connected accordingly. It can be known that the silo 1 is used to accommodate powder P, and can be output through the outlet end 11, and the powder P can be discharged through the body 2; the body 2 forms a powder channel 21 in the middle, so that the powder P can be discharged through the powder channel 21; the body 2 is provided with a first connecting pipe 22 and a second connecting pipe 72 on one side of its inner edge. The interior of the first connecting pipe 22 is a hollow tubular structure with a built-in power transmission component, and the interior of the second connecting pipe 72 is hollow. The tubular structure is a high-pressure air channel; the first connecting pipe 22 is connected to a gear box 23 in a tubular shape at one end in the powder channel 21, and the other end of the first connecting pipe 22 is connected to the outer surface of the body 2, and a through hole 221 is formed on the outside thereof; in a specific embodiment, stainless steel precision castings are selected to have high precision and strength, corrosion resistance and easy manufacturing and maintenance; and the bottom end of the body 2 can be used to connect other powder conveying equipment, such as a rotary valve, to feed the powder P, which is only an example and is not intended to be limiting; as for the installation method of the silo 1, it can be as follows Figures 1 to 8 As shown, the body 2 may be provided with flanges 25 at its top and bottom side edges, which can be directly docked with the silo 1 and locked in place. The bottom end of the body 2 can be assembled with other powder conveying devices in the same manner. In other embodiments, when special processes (such as cleaning or disinfection) need to be frequently performed, to facilitate cleaning and maintenance of the silo 1 or the interior of the body 2, a tube bundle 9 can be used to quickly disassemble the body 2, as shown in Figures 9 and 10. This improves the convenience and applicability of the present invention, making it adaptable to various types of silos 1 and facilitating corresponding disassembly, cleaning and maintenance. The powder plant determines whether its production system uses flanges 25 or tube bundles 9 as the connection method. Therefore, the body 2 selectively adopts flanges 25 or tube bundles 29 at the top end according to the type of pipe joints in the powder plant, and is correspondingly assembled at the outlet end 11 of the silo 1.

[0027] A power transmission assembly 3 is provided with a longitudinal transmission shaft 31, a longitudinal bevel gear 32, a transverse bevel gear 33 and a transverse transmission shaft 34; wherein the longitudinal direction referred to in the present invention refers to the direction corresponding to the powder channel 21 of the main body 2; and the longitudinal transmission shaft 31 is set to pass through and be pivotally mounted on the gear box 23, and the top end of the longitudinal transmission shaft 31 is transmission-connected to an upper cover 4, the longitudinal transmission shaft 31 is transmission-connected to the longitudinal bevel gear 32, and the transverse transmission shaft 34 is passed through the first connecting tube 22 and transmission-connected to the transverse bevel gear 33, and the transverse bevel gear 33 is meshed with the longitudinal bevel gear 32; and the gear box 23 can accommodate the longitudinal bevel gear 32 and the transverse bevel gear 33, and to facilitate their reduction configuration, in one embodiment, the longitudinal bevel gear 32 is larger and has a larger number of teeth, while the transverse bevel gear 33 is smaller and has a smaller number of teeth, so as to achieve the purpose of steering transmission and reduction.

[0028] As for the configuration of the upper cover 4, it is located at the top of the gear box 23, so that the longitudinal transmission shaft 31 can be driven to the upper cover 4 for pivoting, and the upper cover 4 is provided with a knife 41 extending to the top of the body 2; and for the setting of the knife 41, a rotary arm 42 can be extended from one side of the upper cover 4, and a knife seat 43 is provided at the end of the rotary arm 42. The shape of the knife seat 43 can fix the direction of the knife 41 so that the knife does not deviate, and the knife 41 can be directly or correspondingly connected to the knife seat 43. , so that the blade 41 can be removed from the blade holder 43 for cleaning or replacement; the blade 41 can be tilted to correspond to the contour of the silo 1. Combined with the above-mentioned configuration, the blade 41 can accurately correspond to the contour of the silo 1 to accommodate the different silo hopper angles of various powder factories; through the assembly configuration between the blade 41 and the rotary arm 42, it is convenient to select a blade 41 of appropriate length or tilt according to the type or diameter of the silo 1, and directly connect it or lock it to the rotary arm 42 with screws; and

[0029] A gear motor 5, which in one embodiment can be configured as a reduction motor to provide power; with this configuration, the gear motor 5 will be able to output power to rotate the transverse transmission shaft 34 configured in the first connecting tube 22, so that as mentioned above, it is turned and reduced in speed to the longitudinal bevel gear 32, so as to drive the longitudinal transmission shaft 31 to rotate to drive the upper cover 4, and then the upper cover 4 drives the blade 41 to rotate in a slow circular path to destroy the bridging phenomenon of the powder P; and preferably, as Figure 6 As shown, the blade 41 can be inserted into the silo 1 to a certain depth, so that when the force is transmitted, it can be rotated and moved along the wall of the silo 1 to destroy the bridges of the powder P.

[0030] By this, Figures 5 to 7As shown, with respect to the structural arrangement of the present invention, the longitudinal transmission shaft 31, longitudinal bevel gear 32, and transverse bevel gear 33 of the power transmission assembly 3 are primarily disposed within the gear box 23 to mechanically transmit power to the upper cover 4 and the blade 41. This results in a relatively streamlined power transmission system without complex transmission methods, thereby preventing vibration or noise during operation. Furthermore, through the aforementioned reduction transmission configuration, the blade 41 circumferentially moves within the silo 1, allowing its kinetic energy to continuously disrupt the bridging (or static balance) of the powder P within the silo 1 or the powder passage 21 of the main body 2. Furthermore, since excessive rotation of the blade 41 may cause powder P to fly, potentially posing a dust explosion hazard, the blade 41 rotates slowly to maintain a stable and stable powder P. However, the output speed of the gear motor 5 cannot meet the low speed requirement, and therefore, the longitudinal bevel gear 32 and transverse bevel gear 33 are used to reduce the speed again, allowing the blade 41 to move at a slower speed. This prevents powder P from flying and allows the powder P to be smoothly discharged through the main body 2.

[0031] In one embodiment of the present invention, to prevent the risk of dust explosions caused by static electricity generated by contact friction between particles of the powder P, which is an important issue that must be addressed in related factories, at least one contact 24 is provided on the main body 2. The contact 24 is connected to a grounding wire 241. Static electricity accumulated due to friction between the powder P is discharged through the grounding wire 24, thereby avoiding electrostatic discharge sparks caused by static electricity accumulation, thereby achieving safety during operation.

[0032] As for the assembly configuration of the power transmission assembly 3, since the upper cover 4 is as shown in FIG. Figure 5 、 6 As shown, the upper end of the gear box 23 is located, and in order to prevent the powder P from being retained on the upper cover 4, the top of the upper cover 4 is conical, so that the upper cover 4 can meet the hygienic requirements of the food processing process. Because the powder P cannot be retained on the conical surface but will be retained on the flat surface, the conical setting can guide the powder P and prevent the powder P from being retained; and it should be noted that, and Figure 5 、 6 The cross-sectional view shown is a cross-sectional view of the first connecting pipe 22, which is used to present the transmission configuration of the present invention. Therefore, the first connecting pipe 22 is shown to block the powder channel 21 of the body 2. In fact, the first connecting pipe 22 and the gear box 23 are not completely blocked in the powder channel 21. Figure 7As shown, the powder P can be discharged from the powder channel 21. As for the arrangement of the transverse transmission shaft 34, in order to facilitate its support and positioning on the first connecting tube 22, it can be connected to the gear motor 5 at one end for transmission. A gear motor seat 51 can be provided, which is correspondingly connected and arranged between the main body 2 and the gear motor 5. The gear motor seat 51 can be used to position the main body 2 and the gear motor 5. The transverse transmission shaft 34 is correspondingly arranged on the gear motor seat 51 and can be supported and pivoted by the transverse transmission shaft bearing 341. The transverse transmission shaft 34 can be directly assembled or locked to the transverse bevel gear 33, so that it can synchronously drive the transverse bevel gear 33 to rotate.

[0033] As for the transmission configuration of the longitudinal transmission shaft 31, in one embodiment, a keyway and a key can be provided between the upper cover 4 and the longitudinal bevel gear 32 to correspondingly perform assembly and transmission, thereby improving the stability of its power transmission; and in order to facilitate the rotation and positioning configuration of the longitudinal transmission shaft 31 passing through the gear box 23, in one embodiment, the bottom end of the gear box 23 can have an opening 231, so that the longitudinal transmission shaft 31 and the longitudinal bevel gear 32 can be assembled through the opening 231 at the bottom end, and by providing a lower cover 35, it can correspond to the closed cover and be provided at the opening 231 at the bottom end of the gear box 23, and the lower cover 35 corresponds to the longitudinal transmission shaft 31, and in one embodiment, the lower cover 35 is provided with a locking screw 351 , and is correspondingly assembled on the longitudinal transmission shaft 31, and can be correspondingly assembled on the upper cover 4, and can be synchronously rotated with the longitudinal transmission shaft 31 and the upper cover 4, so as to facilitate the stable positioning of the longitudinal transmission shaft 31 in the axial direction; and preferably, in order to facilitate the smooth rotation of the longitudinal transmission shaft 31 and not be easily affected by the pressure of the powder P, at least one longitudinal transmission shaft bearing 311 can be provided between the longitudinal transmission shaft 31 and the gear box 23, or between the longitudinal transmission shaft 31 and the lower cover 35. Preferably, two pairs of longitudinal transmission shaft bearings 311 are respectively provided at the upper end and the lower end of the longitudinal transmission shaft 31, so that the longitudinal transmission shaft bearings 311 can be supported while ensuring its smoothness and effectiveness during pivoting.

[0034] And as Figure 6 As shown, since the present invention is installed at the outlet end 11 of the silo 1 during use, the powder P can enter the powder passage 21 of the main body 2 through the outlet end 11. As described above, the present invention can be driven by the gear motor 5, which sequentially transmits power through the transverse transmission shaft 34, the transverse bevel gear 33, the longitudinal bevel gear 32, and the longitudinal transmission shaft 31 to the upper cover 4, thereby driving the blade 41 to rotate. During this process, the powder passage 21 of the main body 2 will be filled with powder P. Since the powder P has a small particle size depending on its type, in order to prevent the intrusion of powder P and cause jamming or wear of the mechanism, the present invention is provided with corresponding and comprehensive measures to prevent the intrusion of powder P.

[0035] Since the upper cover 4 is pivotable relative to the gear box 23, they are not tightly fitted together. However, with the present invention, a slight gap may exist only between the upper end of the gear box 23 and the upper cover 4, leaving no other locations open to intrusion. To prevent the powder P from entering through the aforementioned gap, in one feasible embodiment, the upper cover 4 may entirely shield the upper end of the gear box 23, or a sealed bearing arrangement may be provided between the upper cover 4 and the gear box 23.

[0036] The present invention has three layers of powder intrusion protection mechanism:

[0037] The first layer of protection mechanism is an air purge device 7. The air purge device 7 includes a high-pressure air pipe connector 71 provided on one side of the inner edge of the body 2. In one embodiment, the high-pressure air pipe connector 71 can correspond to be parallel to the first connecting pipe 22, and one end of the high-pressure air pipe connector 71 is connected to the gear box 23, and the other end is located at the outer ring surface of the body 2, so that the high-pressure air pipe connector 71 can be as Figure 5 、 6 As shown, by being connected to an external compressed air source (not shown), it outputs high-pressure gas to the high-pressure air pipe connector 71 and enters the gear box 23, so that a positive pressure high-pressure area is formed in the gear box 23. By using the high-pressure air pressure method, the gear box 23 is shielded from the invasion of powder P, so as to achieve the first layer of protection, thereby maintaining the transmission state of each component of the present invention and preventing it from being worn by the invasion of powder P, thereby ensuring the smooth operation of the present invention and significantly improving its service life.

[0038] The second layer of protection mechanism is provided with a labyrinth seal 6, including at least one labyrinth seal lower layer 61 provided at the top annular surface of the gear box 23, and a labyrinth seal upper layer 62 corresponding to the labyrinth seal lower layer 61 is provided at the bottom end of the upper cover 4, which can be directly formed by the gear box 23 or the upper cover 4 respectively, and the upper cover 4 is correspondingly covered at the top of the gear box 23, so as to stop the powder P through the labyrinth seal upper layer 62 and the labyrinth seal lower layer 61, making it difficult for the powder P to invade or get stuck between the gear box 23 and the upper cover; and preferably, the labyrinth seal 6 is a labyrinth seal upper layer 62 and the labyrinth seal lower layer 61, with a concave and convex feature configuration corresponding to each other, and its configuration can be as follows Figure 2 、 Figure 6 and Figure 8 As shown, in one embodiment, the labyrinth seal upper layer 62 can be annularly arranged on the top ring surface of the gear box 23, and can be a sawtooth-like tooth groove arrangement with a concave and convex arrangement, and the labyrinth seal lower layer 61 arranged at the bottom end of the upper cover 4 can be a tooth portion corresponding to the convex and concave arrangement, so that it can correspond to and be very close to the concave and convex contour of the labyrinth seal upper layer 62, and through its configuration, it can be as follows. Figure 8As shown, a labyrinth-like gap is formed between the labyrinth-type sealing upper layer 62 and the labyrinth-type sealing lower layer 61. Even if powder P invades, it will be blocked or retained by each of the concave and convex configurations of the labyrinth-type sealing upper layer 62 or the labyrinth-type sealing lower layer 61, greatly increasing the difficulty of invasion. The powder P is thereby blocked, and the probability of powder P invading is extremely small. This ensures that the present invention can perform effective transmission without wear or jamming caused by the invasion of powder P, thereby improving the effectiveness and stability during operation.

[0039] The third layer of protection is a mechanical shaft seal, such as a bearing seal 8, which is provided at one end of the longitudinal transmission shaft 31 at the gear box 23. The corresponding seal abuts between the longitudinal transmission shaft 31 and the gear box 23, thereby forming a terminal protection means. The mechanical seal can directly penetrate the body to effectively and reliably block the powder P and prevent it from invading the power transmission component 3, thereby ensuring the effective and stable operation of the present invention.

Claims

1. A powder bridging destruction device, characterized in that: It is used to be installed at an outlet end of a silo. The powder bridging destruction device includes: A body is annularly arranged to form a powder channel in the middle thereof. A gear box is disposed at the center of the body. Two opposing first and second connecting tubes are disposed on the inner edge of the body to hold the gear box located at the center of the body. The first connecting tube is a hollow tubular structure to accommodate a mechanical transmission structure; the second connecting tube is also a hollow tubular structure to serve as a compressed air conduit. a power transmission assembly comprising a longitudinal transmission shaft, a longitudinal bevel gear, a transverse bevel gear, and a transverse transmission shaft; wherein the longitudinal transmission shaft extends through the gearbox and is correspondingly connected to an upper cover; the longitudinal transmission shaft is connected to the longitudinal bevel gear; the transverse transmission shaft extends through the connecting tube and is connected to the transverse bevel gear, and the transverse bevel gear meshes with the longitudinal bevel gear; An upper cover is located at the top of the gear box, and a rotary arm is extended from one side of the upper cover, and a knife shifting seat is provided at the end of the rotary arm; A knife shifter, whose corresponding movable group is connected to the knife shifter seat, is taken out for cleaning or replacement; a gear motor correspondingly connected to the transverse transmission shaft for outputting power to drive the transverse transmission shaft to rotate, thereby driving the longitudinal transmission shaft to rotate through the transverse and longitudinal bevel gears, thereby rotating the upper cover to transmit power to the paddle for rotation and paddle movement; A gear motor seat is correspondingly connected and arranged between the body and the gear motor, and the transverse transmission shaft is correspondingly arranged in the gear motor seat.

2. The powder bridging destruction device according to claim 1, characterized in that: It further includes a labyrinth seal, which includes at least one labyrinth seal lower layer arranged on the top ring surface of the gear box, and a labyrinth seal upper layer corresponding to the labyrinth seal lower layer is provided at the bottom end of the upper cover, and the upper cover is correspondingly covered at the top of the gear box. The labyrinth seal is a labyrinth seal upper layer and a labyrinth seal lower layer, with concave and convex features corresponding to each other.

3. The powder bridging destruction device according to claim 1, characterized in that: It further comprises an air blowing device, which includes a high-pressure air pipe joint provided on one side of the inner edge of the body, one end of which is correspondingly connected to the gear box, and a positive pressure is input into the gear box through the high-pressure air pipe joint.

4. The powder bridging destruction device according to any one of claims 1 to 3, characterized in that: The gear box further comprises a lower cover which is sealed and arranged at the bottom end of the gear box, and the lower cover is arranged correspondingly to the longitudinal transmission shaft.

5. The powder bridging destruction device according to claim 4, characterized in that: At least one transmission shaft bearing is further provided between the longitudinal transmission shaft and the gear box, or between the longitudinal transmission shaft and the lower cover, and at least one of the transverse transmission shafts.

6. The powder bridging destruction device according to claim 5, characterized in that: It further comprises a bearing seal, and each transmission shaft bearing is provided with a bearing seal.

7. The powder bridging destruction device according to any one of claims 1 to 3, characterized in that: The top end of the upper cover is arranged in a cone shape.

8. The powder bridging destruction device according to any one of claims 1 to 3, characterized in that: The top end of the body selectively adopts a flange or a pipe bundle to be correspondingly assembled at the outlet end of the silo.

9. The powder bridging destruction device according to any one of claims 1 to 3, characterized in that: The outer surface of the main body is further provided with at least one contact point, which is connected to a grounding wire to conduct away static electricity accumulated due to friction of the powder.

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