Powder bridge-empty-preventing spiral conveying stock bin device for road building

Abstract

The invention discloses a bridge-empty-preventing powder spiral conveying bin device for road building. The bridge-empty-preventing powder spiral conveying bin device is used for solving the problems of arching and bridging in the falling process of materials in a large bin. The stock bin device comprises a material storage part, a funnel part, a spiral conveying part and an arch breaking assembly, when materials are in bridge vacancy in a stock bin, under the action of centrifugal force, a metal chain is unfolded, the tail end of the metal chain collides with the bin wall of the funnel part, and arch breaking is conducted on the bridge vacancy materials in the bin; when the stock bin is full of materials and no bridge space exists, the metal chain is in a bending and winding state under the resistance effect of the materials in the inner cavity of the funnel part, the tail end of the metal chain cannot impact the bin wall of the funnel part, and switching of the two working states is automatically carried out without human intervention.

Description

Technical Field

[0001] This invention relates to the field of screw conveyor silos for road construction powder. Background Technology

[0002] In highway engineering, common road-building powder materials include cement, quicklime, hydrated lime, fly ash, and blast furnace slag powder. These are used in large quantities and require different proportions depending on the project. Screw conveyor silos are frequently used for the storage and proportioning of these powder materials. In screw conveyor silos for powders and granules, physical phenomena such as "bridging" and "idling" often occur at the cone section of the silo. This is because, due to the uneven flow of materials, the central part of the silo becomes empty first, while the material flow rate around the perimeter is slower. Combined with factors such as moisture, caking, static electricity, or irregular shape, these factors create stable "arches" or "bridges" that prevent the material from falling naturally under gravity, causing an interruption in material flow and resulting in an "empty bridge" phenomenon. At this time, the screw conveyor silo will idle, failing to effectively transport materials and affecting production continuity and the accuracy of the proportions of different components.

[0003] To solve the above problems, the current equipment involves installing an eccentric vibrating motor on the outside of the hopper wall. The vibrating motor applies vibration to the hopper to break up the bridge void.

[0004] For example, CN202520273486.X discloses a high-viscosity fly ash buffer feed silo with anti-clogging performance. A spiral agitator is connected to the lower interior of the buffer feed silo body, located at the top of the discharge port. This effectively breaks up any agglomerates or arches formed at the discharge port, ensuring that the fly ash flows smoothly out of the discharge port, thus avoiding problems such as uneven discharge or blockage caused by agglomerates or arches. However, this spiral agitator requires an additional drive motor, has a complex structure, and is prone to jamming.

[0005] Based on the above-mentioned problems, the present invention provides a screw conveyor silo device with an arch-breaking effect. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a road construction powder anti-bridging spiral conveyor silo device, which solves the problems of arching and bridging that occur when materials fall from large silos during construction processes such as road mixing plants.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A road construction powder anti-bridging screw conveyor silo device includes a storage section, a funnel section, a screw conveyor section, and an anti-bridging component. The funnel section is located below the storage section, and the inner cavities of the two sections are interconnected. The inner cavity of the funnel section has a funnel structure that gradually narrows from top to bottom. The screw conveyor section is located at the lowest point of the funnel section and quantitatively conveys the material from the funnel section. The anti-bridging component includes a main shaft, mounting supports, and a metal chain. The main shaft body is located in the inner cavity of the funnel section and its two ends are rotatably mounted on the silo wall of the funnel section. The shaft ends of the main shaft extend to the outside of the silo wall and are driven by the screw conveyor section through a transmission component. At least one set of mounting supports is provided on the main shaft located in the inner cavity of the funnel section, and a metal chain is fixedly installed at the end of each mounting support. When bridging occurs in the material in the silo, the metal chain unfolds under the action of centrifugal force and strikes the silo wall of the funnel at the end of the metal chain to break the bridging of the material in the silo. When the material is full in the hopper and there is no gap, the metal chain is in a bent and wrapped state under the resistance of the material in the inner cavity of the funnel, and the end of the metal chain cannot hit the wall of the funnel.

[0008] Furthermore, a ball is provided at the end of the metal chain. This ball impacts the inner wall of the hopper instead of the end of the metal chain. The ball can be an alloy ball or a rubber ball. The impact of the ball is, for example, greater than the impact force of the metal chain, thus improving the arch-breaking effect.

[0009] Furthermore, it also includes a first airbag, a second airbag, and a movable plate. The first airbag is installed at the position where the sphere impacts the chamber wall, and the movable plate is movably installed on the chamber wall of the funnel section in a top-down suspended state. The movable plate overlaps and presses on the first airbag to provide the impact point for the sphere. The second airbag is installed on the chamber wall at the bridge position, and the two airbags are connected by a steel pipe. The first airbag is in an inflated state, and in this state, there is an angled space between the movable plate and the chamber wall. When a bridging occurs in the material silo, the angular space is subjected to the action of the ball hitting the movable plate. The movable plate squeezes the first airbag and transmits the air pressure along the stainless steel pipe to the second airbag. The second airbag expands in volume, thus breaking the bridging phenomenon of the material. When the material is full in the hopper and there is no gap in the bridge, the sphere cannot impact the movable plate.

[0010] Furthermore, it also includes a movable plate, which is movably mounted on the wall of the funnel in a top-down suspended state, and an elastic element is provided between the movable plate and the inner wall of the funnel. The movable plate provides an impact point for the ball, and at least one set of long rods extending from the movable plate are provided, with the top of the long rods located in a position prone to arching.

[0011] Furthermore, the elastic element is a metal spring or an air spring, and under the action of the elastic element, there is a wedge-shaped space between the movable plate and the bin wall.

[0012] Furthermore, it also includes a metal crossbar and a flexible rod, wherein the two ends of the metal crossbar are fixedly connected to the bin wall, the metal crossbar has an upward arch, and the metal crossbar is located at the arched position where a bridging void occurs; the flexible rod is a rod extending downward from the middle section of the metal crossbar, and the lowest end of the flexible rod is a plate-like portion with a larger area, and: When bridging occurs in the material silo, the plate-shaped part is impacted by the ball. The impact causes the plate-shaped part to vibrate and transmits the vibration to the metal crossbar. The metal crossbar and the elastic bar together disturb the bridging of the material, thus breaking the bridging phenomenon. When the material is full in the hopper and there is no gap, the sphere will not collide with the plate-shaped part.

[0013] Furthermore, a safety grille is provided at the top of the internal space of the storage section to support personnel and prevent injury from the spiral mechanism.

[0014] Furthermore, the safety grille is made of steel strips that penetrate from the silo wall of the storage section and is secured on the outside using clamping strips.

[0015] Furthermore, the spiral conveying unit includes a geared motor, a spiral conveying auger, an auger cylinder, and a mounting base. The spiral conveying auger is installed in the spiral conveying unit and is horizontally arranged. One mounting base is installed on each side of the equipment frame platform and the auger cylinder is installed thereon. One end of the spiral conveying auger extends outward and establishes a drive connection with the geared motor.

[0016] Furthermore, the silo body is either a square silo or a round silo.

[0017] The beneficial effects of this invention are: This invention utilizes an arch-breaking component designed within a storage chamber. The core of this component is the use of the weight of a metal chain and the centrifugal force generated by its rotation. During idle operation, the metal chain is straightened and impacts the inner wall of the chamber, thus breaking up the arches within. After arch breaking, the material submerges the metal chain, which then bends, agitating the material and aiding in powder fluidization, thereby preventing arching. Simultaneously, the bent end of the metal chain does not impact the inner wall of the chamber, achieving a dual-mode operation: idle impact and no impact during operation. The switching between these two modes occurs autonomously without human intervention, and maintenance is unnecessary even during long-term operation. This will be explained in more detail in specific embodiments. Attached Figure Description

[0018] Figure 1This is a three-dimensional view of the material silo.

[0019] Figure 2 This is the main view of the silo.

[0020] Figure 3 This is a side view of the silo.

[0021] Figure 4 for Figure 3 Sectional view A-A.

[0022] Figure 5 This is a partial schematic diagram of the top of the silo.

[0023] Figure 6 This is a schematic diagram of the arch-breaking component in this silo.

[0024] Figure 7 The arch-breaking component is in an idle state, simulating arching inside the chamber.

[0025] Figure 8 The mixing state of the arch-breaking component is simulated to ensure the chamber is full and without arches.

[0026] Figure 9 This is a three-dimensional structural representation of Example 2.

[0027] Figure 10 for Figure 9 Full sectional view.

[0028] Figure 11 for Figure 10 The corresponding arch-breaking component is in an idle state, simulating arching inside the warehouse.

[0029] Figure 12 This is a full sectional view of Example 3.

[0030] Figure 13 This is a structural demonstration of the movable panel and long pole.

[0031] Figure 14 This is a full sectional view of Example 4.

[0032] In the picture: 100. Equipment rack; 110. Access ladder. 200. Storage compartment; 210. Safety grille; 211. Card slot; 220. Card strip; 221. Screw. 300. Funnel section, 400. Screw conveyor section; 410. Gear motor; 420. Reducer; 430. Belt drive assembly; 430'. Belt drive assembly; 440. Screw conveyor auger; 450. Auger cylinder; 451. Discharge port. 500. Arch-breaking component; 510. Main shaft; 520. Mounting support; 530. Metal chain; 531. Sphere; 540. No. 1 airbag; 541. Movable plate; 542. Long rod; 543. Elastic element; 550. No. 2 airbag; 560. Stainless steel pipe; 570. Metal crossbar; 571. Elastic rod; 572. Plate-shaped part. Detailed Implementation

[0033] Example 1, this example will be described in conjunction with the appendix to the specification. Figure 1 To be continued Figure 8 A detailed description is given of an anti-bridge, hollow screw conveyor hopper.

[0034] The silo includes an equipment frame 100, a storage section 200, a funnel section 300, and a screw conveyor section 400. The equipment frame 100 has a ladder 110 for inspection and maintenance. The storage section 200 is the main storage area for powdery, granular, or small lump materials, such as various types of cement, quicklime, hydrated lime, fly ash, blast furnace slag powder, or various additives. In this embodiment, it has been optimized and improved. Specifically, a safety grille 210 is installed at the top of the internal space of the storage section 200. The safety grilles 210 are densely arranged, with a spacing of 10-20 cm between adjacent grilles, forming a safety barrier. That is, if a person falls in due to work error, the safety grille 210 can support the person and prevent injury from the screw conveyor.

[0035] Furthermore, the safety grille 210 is made of steel strips, which penetrate the silo wall of the storage section 200, forming multiple spaced steel grilles. Slots 211 are provided at both ends of the steel strips for fixing. A retaining plate 220 is inserted into the slots 211 of the steel strips from the outside of the silo wall, limiting and fixing the safety grille 210. This structure achieves end-fixation of the safety grille 210. Furthermore, after the retaining plate 220 is in place, screws 221 are used to tighten it between the retaining plate 220 and the silo wall, thereby effectively fixing the safety grille 210.

[0036] Below the storage section 200 is the funnel section 300, and below the funnel section 300 is the screw conveyor section 400. The inner cavities of the three sections are interconnected, forming a channel for material storage and descent.

[0037] The screw conveyor unit 400 includes a geared motor 410, a reducer 420, a belt drive assembly 430, a screw conveyor 440, an auger drum 450, and a mounting base 460. The screw conveyor 440 is installed in the screw conveyor unit 400 and is horizontally arranged. Two mounting bases 460 are installed on the platform of the equipment frame 100 on the left and right sides to fix the auger drum 450. Both ends of the auger drum 450 are fastened to the mounting bases 460 with bolts, fixing the auger drum 450 to the lower end of the funnel unit 300 and creating a connection between them. This allows material from the funnel unit 300 to enter the auger drum 450 and be quantitatively and directionally output under the conveying action of the screw conveyor 440. A discharge port 451 is provided below the auger drum 450 at the output end of the screw conveyor 440 to achieve quantitative discharge. Specifically, the two ends of the screw conveyor 440 are installed in the auger cylinder 450 via bearings, sealing rings, and bearing caps. One end of the screw conveyor 440 extends outward and is fitted with a pulley. A drive connection is established with the lower geared motor 410 via a belt drive assembly 430 and a reducer 420, thereby driving the screw conveyor 440. An improvement of the present invention is that an arch-breaking assembly 500 is provided in the inner cavity of the funnel portion 300 directly above the screw conveyor 440. The arch-breaking assembly 500 includes a main shaft 510, a mounting support 520, and a metal chain 530. The two ends of the main shaft 510 are installed on the bin wall via bearings, sealing rings, and bearing caps. One end of the main shaft 510 extends outward and is fitted with a pulley, establishing a drive connection with the lower screw conveyor 440 via a belt drive assembly 430'. Several mounting supports 520 are welded onto the main shaft 510, and one end of the metal chain 530 is fixedly mounted on the end of the mounting support 520. The metal chain 530 has a long length; specifically, when extended, the distal end of the metal chain 530 can touch the hopper wall and collide with it, producing an impact action. This metal chain 530 has two working states: State 1, when the funnel section 300 is full, the metal chain 530 is in a bent and wound state due to the resistance of the internal material, that is, the metal chain 530 cannot be fully extended and will not cause impact to the inside of the hopper. (Refer to...) Figure 8 In state two, when an arch bridge appears inside the silo, it typically occurs at the junction of the storage section 200 and the funnel section 300. In this state, there is no material around the metal chain 530, and the metal chain 530 is in an extended state. That is, the metal chain 530 is extended under the action of centrifugal force. In this extended state, the end of the metal chain 530 impacts the inner wall of the funnel section 300, causing vibration on the inner wall. This vibration causes the material inside the silo to collapse rapidly and fall, thus breaking the arch bridge inside the silo. (Refer to...) Figure 7 .

[0038] Optimally, in this embodiment, the main shaft 510 is eccentric in the inner cavity of the funnel, which ensures that the metal chain 530 only experiences one impact during one rotation.

[0039] Furthermore, in Figure 10 As shown, the metal chain 530 impacts the bin wall from an upward to a downward angle, making full use of the metal chain 530's own weight and centrifugal force to generate a greater impact force.

[0040] In this embodiment, the silo body is square, but it can also be cylindrical.

[0041] Furthermore, the top of the silo can be equipped with a silo roof or not, depending on the material. For example, when the material is sand and gravel, a silo roof is not required, while when the material is cement powder, a silo roof is required.

[0042] The function of the screw conveyor 440 is to propel the material forward when it rotates and discharge it through the discharge port 451 located on the side below. The material is discharged in a quantitative manner by controlling the rotation speed of the screw conveyor.

[0043] Furthermore, a ball 531 is hinged to the far end of the aforementioned metal chain 530. The ball 531 can be an alloy ball or a rubber ball. Depending on the actual needs, the ball can be a hollow ball or a solid ball. It is installed at the end of the metal chain 530 and has greater impact kinetic energy. When the metal chain 530 is extended, the ball 531 will impact the inner wall of the hopper. The impact of the ball 531 is greater than the impact force of the metal chain 530, which improves the arch breaking effect. This design can also improve maintainability, that is, the ball can be easily and quickly replaced.

[0044] Example 2 refer to Figures 9 to 11A ball 531 is installed at the end of the metal chain 530. This ball impacts the first airbag 540 on the inner wall of the bin. After the impact, the first airbag 540 is connected to the second airbag 550, and the high pressure generated in the first airbag 540 is transmitted to the second airbag 550. The second airbag 550 is positioned at a location prone to arching and is fixedly installed on the bin wall to achieve expansion and break the arch. Specifically, holes are made in the bin for installing the first airbag 540 and the second airbag 550. Preferably, the airbag includes a steel shell and an airbag plate, wherein the airbag plate seals the steel shell to form an airbag, and the steel shell is provided with a connecting pipe port. The steel shell is fastened to the inner wall of the bin with screws, and the two airbags are connected through a stainless steel pipe 560. The stainless steel pipe 560 is located on the outside of the bin and does not affect the material feeding process.

[0045] Furthermore, to enhance the compression effect on the first airbag 540, a movable plate 541 is installed on the wall of the first airbag 540. The movable plate 541 is movably installed on the wall via a hinge. After installation, the movable plate 541 hangs from top to bottom, overlapping and pressing on the first airbag 540. Initially, the first airbag 540 is inflated, and in this state, the first airbag 540 slightly lifts the movable plate 541. That is, in the initial state, there is an angle space between the movable plate 541 and the wall. When the movable plate 541 is impacted by the ball 531, this angle space compresses the first airbag 540 and generates high-pressure gas. This high-pressure gas is conducted along the stainless steel pipe 560 to the second airbag 550, causing the second airbag 550 to expand rapidly. The expanded second airbag 550 impacts and compresses the material inside the chamber, thereby disrupting the material bridging. After the material falls smoothly, it accumulates again in the conical hopper, increasing the damping of the metal chain 530 and the ball 531 (material encapsulation), preventing the ball 531 from colliding with the movable plate 541. When bridging occurs again, the screw conveyor empties the material, leaving the conical hopper empty. In this state, the metal chain 530 in the anti-bridging component 500 is taut under centrifugal force and impacts the movable plate 541. The movable plate 541 compresses the first airbag 540, generating high-pressure gas. This high-pressure gas is conducted along the stainless steel pipe 560 to the second airbag 550, causing it to expand rapidly. The expanded second airbag 550 impacts and compresses the material in the hopper, thus breaking the material bridging. This embodiment, through the combination of the expansion impact of the second airbag and the vibration impact of the ball hitting the movable plate, achieves a better anti-bridging effect than Embodiment 1.

[0046] Example 3 refer to Figures 12 to 13A ball 531 is installed at the end of the metal chain 530. The ball impacts the movable plate 541 on the inner wall of the bin. The upper edge of the movable plate 541 is hinged by a steel pin. After installation, the movable plate 541 is in a suspended state. Multiple long rods 542 are welded to the top of the movable plate 541. The top of the long rods 542 is located in a position prone to arching. At the same time, an elastic element 543 is set between the movable plate 541 and the inner wall of the bin. The elastic element 543 can be a metal spring or an air spring. Under the action of the elastic element, there is a wedge-shaped space between the movable plate 541 and the inner wall of the bin.

[0047] The arch-breaking process in this embodiment is as follows: When a bridging occurs in the powder material in the hopper, the screw conveyor empties the material, leaving the conical hopper empty. In this state, the metal chain 530 in the arch-breaking component 500 is taut under centrifugal force and impacts the movable plate 541. The movable plate 541 compresses the elastic element 543, causing the long rod 542 at the top of the movable plate 541 to swing periodically. During the swing of the long rod 542, the top of the rod pushes against the material bridging, thereby breaking the bridging state of the material and allowing it to fall smoothly. After the material falls smoothly, it accumulates again in the conical hopper, increasing the damping of the metal chain 530 and the ball 531 (material encapsulation), preventing the ball 531 from colliding with the movable plate 541. This time, the movable plate 541 is in a relatively stationary state. This embodiment, through the combination of disturbance at the end of the long rod 542 and the vibration impact of the ball hitting the movable plate, achieves a better bridging effect than Embodiment 1.

[0048] Example 4 refer to Figure 14 In this embodiment, a cross-shaped metal crossbar 570 is welded inside the hopper 200. The metal crossbar 570 has an arc-shaped structure, and both ends of the metal crossbar 570 are welded to the hopper wall. The welded metal crossbar 570 has an upward arch. A vertically downward extending elastic rod 571 is welded on the metal crossbar 570. The lower end of the elastic rod 571 has an enlarged plate-like part 572. The plate-like part 572 is located at the end of the metal chain 530 in the unfolded state, and the metal chain 530 can completely impact the plate-like part 572 in the unfolded state.

[0049] The arch-breaking process in this embodiment is as follows: When a bridging occurs in the powder within the silo, the screw conveyor empties the material, leaving the conical silo empty. In this state, the metal chain 530 in the arch-breaking component 500 is taut under centrifugal force and impacts the plate-shaped part 572. The plate-shaped part 572 vibrates and transmits the vibration to the metal crossbar 570. The metal crossbar 570 and the elastic rod 571 together disturb the material bridging, thereby breaking the bridging state of the material and allowing it to fall smoothly. After the material falls smoothly, it accumulates again in the conical silo, increasing the damping of the metal chain 530 and the ball 531 (material encapsulation). The metal chain 530 is in a fully engaged state, preventing the ball 531 from colliding with the movable plate 541. At this point, the metal crossbar 570 and the elastic rod 571 are in a non-working state.

[0050] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention.

Claims

1. A road construction powder anti-bridging screw conveyor silo device, comprising a storage section (200), a funnel section (300), a screw conveyor section (400), and an arch-breaking component (500), wherein the funnel section (300) is located below the storage section (200) and the inner cavities of the two are interconnected, and the inner cavity of the funnel section (300) has a funnel structure that gradually narrows from top to bottom; the screw conveyor section (400) is located at the lowest point of the funnel section (300) and quantitatively conveys the material from the funnel section (300), characterized in that: The arch-breaking assembly (500) includes a main shaft (510), mounting supports (520), and a metal chain (530). The main shaft (510) is located in the inner cavity of the funnel section (300) and is rotatably mounted on the wall of the funnel section (300) at both ends. The shaft end of the main shaft (510) extends to the outside of the wall and is driven by the screw conveyor (400) through a transmission assembly. At least one set of mounting supports (520) is provided on the shaft section of the main shaft (510) located in the inner cavity of the funnel section (300). A metal chain (530) is provided at the end of each mounting support (520), and: When a bridging occurs in the material in the silo, under the action of centrifugal force, the metal chain (530) unfolds and the end of the metal chain (530) hits the silo wall of the funnel (300), breaking the bridging of the material in the silo. When the material is full in the hopper and there is no gap, the metal chain (530) is in a bent state under the resistance of the material in the inner cavity of the funnel (300), and the end of the metal chain (530) cannot hit the hopper wall (300).

2. The anti-bridging screw conveyor silo device for road construction powder as described in claim 1, characterized in that, The end of the metal chain (530) is provided with a ball (531), which replaces the end of the metal chain (530) to impact the inner wall of the hopper.

3. The anti-bridging screw conveyor silo device for road construction powder as described in claim 2, characterized in that, It also includes a first airbag (540), a second airbag (550), and a movable plate (541). The first airbag (540) is installed at the position where the sphere (531) impacts the chamber wall, and the movable plate (541) is movably installed on the chamber wall of the funnel section (300) in a top-down suspended state. The movable plate (541) overlaps and presses on the first airbag (540) to provide an impact point for the sphere (531). The second airbag (550) is installed on the chamber wall at the bridge position, and the two airbags are connected by a steel pipe. The first airbag (540) is in an inflated state. In this state, there is an angled space between the movable plate (541) and the chamber wall, and: When a bridging occurs in the material silo, the angular space is subjected to the action of the ball (531) hitting the movable plate (541). The movable plate (541) squeezes the first airbag (540) and transmits the air pressure along the stainless steel pipe (560) to the second airbag (550). The second airbag (550) expands in volume, destroying the bridging phenomenon of the material. When the material is full in the hopper and there is no gap, the ball (531) cannot impact the movable plate (541).

4. The anti-bridging screw conveyor silo device for road construction powder as described in claim 2, characterized in that, It also includes a movable plate (541), which is movably mounted on the wall of the funnel section (300) in a top-down suspended state and an elastic element (543) is provided between the movable plate (541) and the inner wall of the funnel. The movable plate (541) provides an impact point for the ball (531). At least one set of long rods (542) extending from the movable plate (541) are provided, and the top of the long rods (542) is located in a position prone to arching.

5. A road construction powder anti-bridging screw conveyor silo device according to claim 4, characterized in that, The elastic element (543) is a metal spring or an air spring. Under the action of the elastic element, there is a wedge-shaped space between the movable plate (541) and the bin wall.

6. A road construction powder anti-bridging screw conveyor silo device according to claim 2, characterized in that, It also includes a metal crossbar (570) and an elastic rod (571), wherein the two ends of the metal crossbar (570) are fixedly connected to the bin wall, the metal crossbar (570) has an upward arch, and the metal crossbar (570) is located at the arched position where a bridge appears, the elastic rod (571) is a rod extending downward from the middle section of the metal crossbar (570), and the lowest end of the elastic rod (571) is a plate-like part (572) with a larger area, and: When a bridging occurs in the material silo, the plate-shaped part (572) is struck by the ball (531). The impact causes the plate-shaped part (572) to vibrate and transmits the vibration to the metal crossbar (570). The metal crossbar (570) and the elastic rod (571) together disturb the bridging of the material, thus breaking the bridging phenomenon. When the material is full in the hopper and there is no gap, the sphere (531) will not collide with the plate (572).

7. A road construction powder anti-bridging screw conveyor silo device according to claim 1, characterized in that, A safety grille (210) is provided on the top of the internal space of the storage section (200).

8. The anti-bridging screw conveyor silo device for road construction powder according to claim 1, characterized in that, The safety grille (210) is a steel strip that passes through the wall of the storage section (200) and is fixed on the outside by a clamping plate.

9. A road construction powder anti-bridging screw conveyor silo device according to claim 1, characterized in that, The spiral conveying unit (400) includes a geared motor (410), a spiral conveying auger (440), an auger cylinder (450), and a mounting base (460). The spiral conveying auger (440) is installed on the spiral conveying unit (400) and is horizontally arranged. One mounting base (460) is installed on each side of the equipment frame (100) and the auger cylinder (450) is installed thereon. One end of the spiral conveying auger (440) extends outward and establishes a drive connection with the geared motor (410).

10. A road construction powder anti-bridging screw conveyor silo device according to claim 1, characterized in that, The silo can be either square or round.

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