A clog-proof structure and a positive pressure pneumatic conveying device

Abstract

This invention discloses an anti-clogging structure and a positive pressure pneumatic conveying device, belonging to the field of powder conveying technology. The invention includes an inner tube and a tube body sleeved outside the inner tube. The two ends of the inner tube gradually narrow towards the middle to form a throat, creating a Venturi channel inside the inner tube. The throat is connected to one end of an air inlet pipe, and the other end of the air inlet pipe is connected to a one-way valve. The one-way valve is located outside the tube body, allowing external gas to enter the interior of the inner tube through the one-way valve. By incorporating the inner tube, the powder flow velocity increases when passing through the throat, generating negative pressure. This allows external gas to enter the inner tube at high speed through the air inlet pipe. The high-speed gas exerts a strong impact on the powder, dispersing any agglomerated particles. Simultaneously, the entering high-speed gas also shears and accelerates the powder, further dispersing already agglomerated powder and preventing subsequent agglomeration.

Description

Technical Field

[0001] This invention relates to the field of powder conveying technology, specifically to an anti-clogging structure and a positive pressure pneumatic conveying device. Background Technology

[0002] Positive pressure pneumatic conveying devices are powder transfer equipment that uses high-pressure airflow to push powder along conveying pipelines. The advantages of positive pressure pneumatic conveying devices are long conveying distance and less clogging, and they are widely used in industrial production.

[0003] Positive pressure pneumatic conveying devices are commonly used to transport powdered materials such as coal powder and cement. When conveying powdered materials with a particle size of less than 10μm, the powder is prone to agglomeration due to van der Waals forces, causing blockages in the conveying pipeline. Summary of the Invention

[0004] To address the aforementioned shortcomings, the present invention provides an anti-clogging structure and a positive pressure pneumatic conveying device. The anti-clogging structure can prevent powder agglomeration and disperse agglomerated powder.

[0005] The first aspect of this invention protects an anti-clogging structure installed in a conveying pipeline. The anti-clogging structure includes an inner tube and a tube body sleeved outside the inner tube. The two ends of the inner tube gradually narrow towards the middle to form a throat, thereby forming a Venturi channel inside the inner tube.

[0006] The throat is connected to one end of the air intake pipe, and the other end of the air intake pipe is connected to a one-way valve. The one-way valve is located outside the pipe body, and the external gas can enter the interior of the inner tube through the one-way valve.

[0007] Furthermore, it also includes rotating parts and oscillating parts;

[0008] The rotating component is rotatably mounted on the air intake pipe, and the gas passing through the air intake pipe can drive the rotating component to rotate.

[0009] The oscillating component is disposed on the inner wall of the inner tube. The oscillating component is connected to the hydraulic component. When the rotating component rotates, it can intermittently drive the hydraulic component to squeeze the oscillating component, causing the oscillating component to oscillate and disperse the agglomerated powder.

[0010] Furthermore, the hydraulic component includes a first hydraulic cylinder, which is disposed between the tube body and the inner tube. The first hydraulic cylinder is connected to an annular pipe through a vertical pipe, and at least two second hydraulic cylinders are provided on the annular pipe.

[0011] The annular pipe is located near both ends of the inner tube;

[0012] The rotating component intermittently drives the first hydraulic cylinder, and the second hydraulic cylinder drives the swing component.

[0013] Furthermore, the first hydraulic cylinder includes a cylinder body, and a first permanent magnet and a spring are provided inside the cylinder body. The elastic force provided by the spring causes the first permanent magnet to approach the pipe wall of the pipe body.

[0014] Furthermore, the rotating component includes an outer sleeve, an inner blade is fixedly provided on the inner wall of the outer sleeve, and at least two second permanent magnets are uniformly fixedly provided on the outer wall of the outer sleeve;

[0015] The second permanent magnet repels the first permanent magnet.

[0016] Furthermore, the two ends of the outer sleeve are fitted onto the outer wall of the intake pipe, and a bearing is provided between the outer sleeve and the intake pipe.

[0017] Furthermore, the swinging component includes a fixing plate, which is fixed to the inner wall of the inner tube. One end of the fixing plate is hinged to one end of the frame, and the other end of the frame is hinged to the second hydraulic cylinder.

[0018] Furthermore, a drying plate is detachably provided on the air intake pipe. The drying plate can dry the gas passing through the one-way valve. The dried gas enters the interior of the inner tube, which can reduce the agglomeration of moist powder.

[0019] Furthermore, it also includes a deformable ring, which can extend and retract along the axial direction of the tube body to disperse agglomerated powder.

[0020] A second aspect of this invention protects a positive pressure pneumatic conveying device, the device comprising a Roots blower, the Roots blower being connected to a storage silo via a conveying pipeline, the conveying pipeline being provided with a feeding hopper, the feeding hopper being close to the Roots blower;

[0021] The conveying pipeline is also equipped with the aforementioned anti-clogging structure.

[0022] Beneficial effects: By incorporating an inner tube, the powder flow velocity increases as it passes through the throat, generating negative pressure. This allows external gas to enter the inner tube at high speed through the inlet pipe. The high-speed gas strongly impacts the powder, dispersing any agglomerates. Simultaneously, the incoming high-speed gas also shears and accelerates the powder, further dispersing already agglomerated powder and preventing subsequent agglomeration. The one-way valve restricts the airflow direction, ensuring it flows only from the outside in, preventing powder accumulation within the inlet pipe. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] in:

[0025] Figure 1 This is a schematic diagram of the overall structure of the positive pressure pneumatic conveying device in one embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the anti-blocking structure in one embodiment of the present invention;

[0027] Figure 3 This is a partial cross-sectional view of the anti-blocking structure in one embodiment of the present invention;

[0028] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0029] Figure 5 for Figure 3 A magnified view of part B in the middle section;

[0030] Figure 6 This is a cross-sectional view of the anti-blocking structure in the vertical direction in one embodiment of the present invention;

[0031] Figure 7 for Figure 6 A magnified view of part C in the middle;

[0032] Figure 8 This is a schematic diagram of the overall structure of the hydraulic component and the swing component after connection in one embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the overall structure of the rotating component in one embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram of the overall structure of the rotating component after removing the bearing in one embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the overall structure of the drying plate in one embodiment of the present invention;

[0036] In the diagram, 1. Anti-clogging structure; 11. Pipe body; 12. Inner tube; 121. Protrusion; 13. One-way valve; 14. Inlet pipe; 15. Deformation ring; 151. Circular ring; 152. Flexible strip; 153. Fixed spring; 16. Swinging component; 161. Fixed plate; 162. Frame; 1621. Strip hole; 163. Moving rod; 17. Hydraulic component; 171. First hydraulic cylinder; 1711. Cylinder body; 1712. First permanent magnet; 1713. Spring; 172. Vertical pipeline; 173. Second hydraulic cylinder; 174. Annular pipeline; 18. Rotating component; 181. Outer tube; 182. Bearing; 183. Second permanent magnet; 184. Inner blade; 19. Drying plate; 191. T-shaped plate; 192. Filter screen. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] refer to Figures 1-11 The first aspect of this invention protects an anti-clogging structure installed in a conveying pipeline. The anti-clogging structure 1 includes an inner tube 12 and a tube body 11 sleeved on the outside of the inner tube 12. The two ends of the inner tube 12 gradually narrow towards the middle and form a throat at the middle position, so that a Venturi channel is formed inside the inner tube 12.

[0039] The throat is connected to one end of the intake pipe 14, and the other end of the intake pipe 14 is connected to the one-way valve 13. The one-way valve 13 is located outside the pipe body 11, and external gas can enter the interior of the inner pipe 12 through the one-way valve 13.

[0040] This invention utilizes an inner tube 12. As the powder passes through the throat, the flow velocity increases, creating negative pressure. This allows external gas to enter the inner tube 12 at high speed through the inlet pipe 14. The high-speed gas strongly impacts the powder, dispersing any agglomerated particles. Simultaneously, the entering high-speed gas also shears and accelerates the powder, further dispersing already agglomerated particles and preventing subsequent agglomeration. A one-way valve 13 restricts the airflow direction, ensuring the airflow only flows from the outside in, preventing powder accumulation within the inlet pipe 14.

[0041] refer to Figures 3-5In one specific embodiment, the anti-clogging structure 1 further includes a rotating member 18 and a swinging member 16. The rotating member 18 is rotatably mounted on the air inlet pipe 14, and gas passing through the air inlet pipe 14 can drive the rotating member 18 to rotate. The swinging member 16 is mounted on the inner wall of the inner tube 12, and the swinging member 16 is connected to the hydraulic component 17. When the rotating member 18 rotates, it can intermittently drive the hydraulic component 17 to squeeze the swinging member 16, causing the swinging member 16 to swing to disperse the agglomerated powder.

[0042] In this embodiment, the airflow inside the air inlet pipe 14 drives the rotating component 18 to rotate, and the rotating component 18 further drives the hydraulic component 17, thereby causing the swing component 16 to swing. The driving process requires no additional power input, saving energy while also providing greater convenience and stability. The swing component 16 is located on the inner wall of the inner tube 12. When swinging, it can break up the already agglomerated powder, effectively dispersing it; at the same time, it can also better disperse the powder to prevent agglomeration during subsequent conveying.

[0043] refer to Figure 6 In one specific embodiment, the inner wall of the inner tube 12 is bent in the axial direction to form a protrusion 121. The protrusions 121 are distributed on the upper and lower sides of the air intake pipe 14. The number of protrusions 121 is set according to the number of air intake pipes 14, and each air intake pipe 14 is provided with two protrusions 121. In this embodiment, there are two air intake pipes 14, which are symmetrically arranged on both sides of the tube body 11.

[0044] In this embodiment, protrusions 121 are provided. The number of protrusions 121 is small, and the two protrusions 121 corresponding to the air inlet pipe 14 are arranged vertically, or along the axis of the pipe body 11. The purpose of having a small number of protrusions 121 is to prevent excessive obstruction of the powder and cause powder accumulation. The protrusions 121 themselves can break the flow state of the powder, generate turbulence, and disperse the agglomerated powder to a certain extent. Taking the powder movement in the figure as an example, when the powder below is conveyed upward, as the inner tube 12 gradually narrows, the flow velocity increases, and it will first collide with the lower protrusions 121, dispersing the agglomerated powder to a certain extent; then, the high-speed gas entering from the air inlet pipe 14 can further disperse the agglomerated powder, making the powder fully dispersed; finally, the upper protrusions 121 disturb the powder, preventing the powder from adhering to the tube wall of the inner tube 12. It should be noted that the powder flow rate decreases as it passes through the throat. Powder at the top of the inner tube 12 tends to adhere to the inner walls of the inner tube 12 and the tube body 11, making it prone to subsequent agglomeration. The protrusion 121 above effectively prevents powder from adhering to the walls at this location, reducing the possibility of subsequent powder agglomeration. In this embodiment, the protrusion 121 also forms a receiving space to accommodate the first hydraulic cylinder 171.

[0045] refer to Figure 6In one specific embodiment, the hydraulic component 17 includes a first hydraulic cylinder 171, which is disposed between the tube body 11 and the inner tube 12. The first hydraulic cylinder 171 is connected to an annular tube 174 via a vertical tube 172. At least two second hydraulic cylinders 173 are provided on the annular tube 174. There may be two, three, or four second hydraulic cylinders 173, which are evenly distributed on the annular tube 174.

[0046] The annular pipe 174 is located near both ends of the inner tube 12. Specifically, there are two annular pipes 174, one at the top end and the other at the bottom end of the inner tube 12. Each annular pipe 174 corresponds to two symmetrically arranged vertical pipes 172, and each vertical pipe 172 corresponds to one first hydraulic cylinder 171. Hydraulic oil is sealed inside the first hydraulic cylinder 171, the vertical pipes 172, and the annular pipe 174. The rotating component 18 intermittently drives the first hydraulic cylinder 171. According to Pascal's law, the first hydraulic cylinder 171 can transmit force to the second hydraulic cylinder 173 through the hydraulic oil. The second hydraulic cylinder 173 then drives the swinging component 16 to swing.

[0047] In this embodiment, a vertical pipe 172 is used to position the oscillating elements 16 at both ends of the inner pipe 12. The lower oscillating element 16 is used to pre-disperse agglomerated powder, while the upper oscillating element 16 disperses the powder due to its tendency to adhere to the wall after the flow rate decreases, preventing subsequent agglomeration. By setting up an annular pipe 174 and a vertical pipe 172, the force of the rotating element 18 is converted into the oscillating force of the circumferentially positioned oscillating elements 16. The oscillation direction of the oscillating elements 16 is along the axial direction of the pipe body 11. The circumferential force formed by multiple oscillating elements 16 acts on the powder, which can more fully and evenly disperse the agglomerated powder. During powder conveying, it can agitate the powder to a certain extent, preventing subsequent agglomeration. In addition, multiple oscillating elements 16 on the same annular pipe 174 oscillate simultaneously, and multiple oscillating elements 16 can form a peristaltic pushing force to propel the powder forward and prevent powder blockage.

[0048] refer to Figure 7 In one specific embodiment, the first hydraulic cylinder 171 includes a cylinder body 1711, within which a first permanent magnet 1712 and a spring 1713 are disposed. The elastic force provided by the spring 1713 causes the first permanent magnet 1712 to approach the wall of the tube body 11. The first permanent magnet 1712 is similar to a piston in a conventional hydraulic cylinder and can move within the cylinder body 1711. In this embodiment, both the inner tube 12 and the tube body 11 are made of fiberglass pipe, which is lightweight, high-strength, and has a smooth inner wall. The smooth inner wall effectively prevents agglomeration caused by powder adhering to the wall. In addition, fiberglass pipe itself is a non-metallic material and will not interfere with the first permanent magnet 1712 and the second permanent magnet 183.

[0049] refer to Figure 6 In one specific embodiment, the rotating component 18 includes an outer sleeve 181, with an inner blade 184 fixedly disposed on the inner wall of the outer sleeve 181, and at least two second permanent magnets 183 uniformly fixedly disposed on the outer wall of the outer sleeve 181. The second permanent magnets 183 can be two, three, or four, preferably four. The second permanent magnets 183 repel the first permanent magnet 1712. Repulsion means that the same magnetic poles of the first permanent magnet 1712 and the second permanent magnets 183 are arranged opposite each other. For example, when the N pole of the first permanent magnet 1712 is close to the tube body 11, the N pole of the second permanent magnet 183 is also close to the tube body 11, thus achieving repulsion. When gas passes through the inner blade 184, it pushes the inner blade 184 to rotate, which in turn drives the outer sleeve 181 to rotate. The second permanent magnets 183 on the outer sleeve 181 rotate, causing each second permanent magnet 183 to repel the first permanent magnet 1712.

[0050] In this embodiment, by setting a second permanent magnet 183, a repulsive force can be intermittently provided to the first permanent magnet 1712, thus achieving two functions. First, the reciprocating motion of the first permanent magnet 1712 intermittently drives the second hydraulic cylinder 173, causing the second hydraulic cylinder 173 to drive the oscillating component 16 to oscillate, directly breaking up agglomerated powder. Second, when the second permanent magnet 183 does not provide a repulsive force, the spring 1713 pushes the first permanent magnet 1712 closer to the tube body 11. At this time, the first permanent magnet 1712 will impact the tube body 11, generating vibration. Because the evenly distributed second permanent magnet 183 can periodically repel the first permanent magnet 1712, the first permanent magnet 1712 will periodically impact the tube body 11, causing the tube body 11 to vibrate in a pulsed manner. This pulsed vibration can effectively break the balance of powder bridging, preventing blockage and agglomeration. In addition, the pulsed vibration can also provide shear force, disrupting the van der Waals forces between powder particles and preventing powder agglomeration. Pulsed vibration also prevents powder from adhering to the walls of the inner tube 12 and the tube body 11, keeping the tube walls smooth and reducing resistance during gas transport. Of course, the larger accommodating space formed by the protrusion 121 allows for a larger volume of the first hydraulic cylinder 171, and correspondingly, a larger volume of the first permanent magnet 1712. This has the advantage of generating a smaller impact force, extending the service life of the tube body 11. In practical applications, considering the service life of the first permanent magnet 1712, the spring force of the spring 1713 can be adjusted to regulate the impact force of the first permanent magnet 1712, causing it to experience a slight impact; alternatively, the outer surface of the first permanent magnet 1712 can be coated with a flexible material such as silicone or rubber to provide cushioning and reduce damage to the first permanent magnet 1712.

[0051] refer to Figure 7 and Figure 9In this embodiment, the number of second permanent magnets 183 is preferably four. As shown in the figure, each of the two second permanent magnets 183 can simultaneously repel or not repel its corresponding first permanent magnet 1712. This allows multiple first permanent magnets 1712 to simultaneously impact the inner wall of the tube 11. Even if the impact force of each individual first permanent magnet 1712 is small, the combined impact force is relatively large, generating effective vibration. The advantage is that it ensures both the service life of the first permanent magnets 1712 and the intensity of the vibration. It also prevents powder from adhering to the inner wall of the tube 11.

[0052] In one specific embodiment, the volume of the second permanent magnet 183 is larger than that of the first permanent magnet 1712. In this embodiment, the first permanent magnet 1712 is chosen as an AlNiCo magnet because it is more impact-resistant than other permanent magnets. Since AlNiCo magnets have relatively weak magnetism, the second permanent magnet 183, regardless of the type of permanent magnet chosen, needs to be relatively large to ensure an effective repulsive force between the first permanent magnet 1712 and the second permanent magnet 183.

[0053] refer to Figure 3 and Figure 6 In one specific embodiment, the two ends of the outer sleeve 181 are fitted onto the outer wall of the intake pipe 14, and a bearing 182 is provided between the outer sleeve 181 and the intake pipe 14. Specifically, the outer sleeve 181 is a small-diameter straight pipe with both ends fixedly connected to a large-diameter straight pipe, forming a structure with large openings at both ends. The middle of the intake pipe 14 is completely disconnected, and the outer sleeve 181 is placed at the disconnection position. The large-diameter straight pipes at both ends of the outer sleeve 181 are directly fitted onto the outside of the disconnection point of the intake pipe 14. A bearing 182 is provided between the large-diameter straight pipe and the intake pipe 14. The bearing 182 is preferably a sealed bearing, but end caps, sealing rings, and grease can also be added to the sealed bearing to increase sealing performance. Preferably, the inner diameter of the small-diameter straight pipe is the same as the inner diameter of the intake pipe 14.

[0054] In this embodiment, the outer sleeve 181 has two functions. First, the outer sleeve 181 can be directly fitted onto the outside of the intake pipe 14, allowing the thrust of the gas passing through the inner blade 184 to directly drive the outer sleeve 181 to rotate, reducing force loss. Second, the high gas velocity within the small-diameter straight pipe drives the inner blade 184 to rotate rapidly, which in turn drives the outer sleeve 181 to rotate rapidly.

[0055] refer to Figure 6 and Figure 8In one specific embodiment, the swing member 16 includes a fixing plate 161, which is fixed to the inner wall of the inner tube 12. One end of the fixing plate 161 is hinged to one end of the frame 162, and the other end of the frame 162 is hinged to the second hydraulic cylinder 173. Specifically, the frame 162 is a U-shaped frame, and the closed end of the frame 162 is hinged to the fixing plate 161. A strip-shaped hole 1621 is provided on the side wall of the frame 162, and the strip-shaped hole 1621 is arranged along the extension direction of the side wall. The swing member 16 also includes a moving rod 163, both ends of which are inserted into the strip-shaped hole 1621, and the middle position of the moving rod 163 is fixedly connected to the telescopic end of the second hydraulic cylinder 173.

[0056] In this embodiment, the fixing piece 161 serves two purposes: first, it increases the rigidity at that location, reducing damage to the tube body 11 caused by frequent swaying of the frame 162; second, it increases the swaying stability of the frame 162, allowing it to operate stably. By providing the frame 162, which possesses a certain degree of rigidity, it effectively disperses agglomerated powder. Simultaneously, the small projected area of ​​the frame 162 within the tube body 11 means its surface effectively reduces powder accumulation. This achieves both the function of dispersing powder and preventing powder accumulation at the frame 162.

[0057] refer to Figure 4 and Figure 11 In one specific embodiment, a drying plate 19 is detachably mounted on the air intake pipe 14. The drying plate 19 dries the gas passing through the one-way valve 13, and the dried gas enters the interior of the inner pipe 12, reducing the agglomeration of moist powder. Specifically, the drying plate 19 is positioned between the rotating member 18 and the one-way valve 13. The drying plate 19 includes a T-shaped plate 191 with a through hole in the middle. Multiple layers of flexible filter screens 192 are arranged within the through hole, and desiccant is filled between adjacent filter screens 192. The desiccant can be silica gel desiccant, activated alumina desiccant, montmorillonite desiccant, etc. Such desiccants can reduce the frequency of replacement.

[0058] In this embodiment, a drying plate 19 is provided to allow the dried gas to enter the interior of the inner tube 12. The dried gas firstly mixes directly with the gas in the conveying pipe 2, reducing the gas's moisture content and preventing condensation at certain pipe locations that could affect the powder. Secondly, the dried gas helps reduce the water content in the powder, preventing agglomeration due to liquid bridging forces. By making the drying plate 19 and the air inlet pipe 14 detachably connected, the drying plate 19 can be easily replaced in a timely manner, ensuring its drying capacity.

[0059] refer to Figure 3In one specific embodiment, the anti-clogging structure 1 further includes a deformable ring 15, which can extend and retract along the axial direction of the tube body 11, thereby breaking up agglomerated powder. In this embodiment, by providing the deformable ring 15, the powder can be blocked, effectively dispersing it and preventing subsequent powder agglomeration. The extendable and retractable nature of the deformable ring 15 prevents powder from accumulating on it.

[0060] refer to Figure 5 In one specific embodiment, the deformable ring 15 includes a rigid circular ring 151, within which a flexible strip 152 is disposed. The number of flexible strips 152 can be one or two. Too many strips can easily cause powder blockage. The material of the flexible strip 152 can be selected from TPU (thermoplastic polyurethane elastomer), high-hardness silicone, and hydrogenated nitrile rubber, etc. Any flexible material with good elasticity and durability is acceptable. The length of the flexible strip 152 can be set relatively long, allowing it to extend further axially, preventing powder from agglomerating at the contact point of the flexible strip 152. A fixing spring 153 is fixedly provided at the end of the flexible strip 152, and the fixing spring 153 is engaged in a groove between the circular ring 151 and the tube body 11. Of course, the size of the circular ring 151 can be adjusted according to actual needs. Preferably, there is no gap between the circular ring 151 and the tube body 11, and the inner diameter of the circular ring 151 is close to the inner diameter of the tube body 11 to prevent powder accumulation.

[0061] In this embodiment, a flexible strip 152 is incorporated. This flexible strip 152 extends upwards and is elastic, allowing it to oscillate with the airflow and vibrate. This disperses the powder as it passes through, preventing agglomeration. The flexible strip 152 effectively extends the powder-dispersing area of ​​the anti-clogging structure 1; that is, the areas touched by the inner tube 12, the oscillating member 16, and the flexible strip 152 can all disperse or prevent powder agglomeration. A fixed spring 153 is also incorporated. When lumpy materials may be present in the powder, they adhere to the flexible strip 152, causing its elasticity to reach its maximum. This triggers the fixed spring 153, causing it to contract and vibrate, thus shaking off the lumpy materials. This prevents the lumpy materials from breaking the flexible strip 152.

[0062] refer to Figure 1 The second aspect of this invention protects a positive pressure pneumatic conveying device, which includes a Roots blower 4. The Roots blower 4 is connected to a storage silo 5 via a conveying pipe 2. A feeding hopper 3 is provided on the conveying pipe 2, and the feeding hopper 3 is close to the Roots blower 4. The conveying pipe 2 is also provided with the aforementioned anti-clogging structure 1. The number of anti-clogging structures 1 is at least two, and they can be set on the conveying pipe 2 according to actual conditions. Flanges are provided at both ends of the pipe body 11, which allows the anti-clogging structure 1 to be detachably connected to the conveying pipe 2. This facilitates the maintenance of the anti-clogging structure 1 and is not limited by the material of the conveying pipe 2, allowing the anti-clogging structure 1 to be applied to a wider range of conveying pipes 2.

[0063] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A clogging prevention structure provided in a delivery pipe, characterized by, The utility model provides a kind of powder dispersing device, including inner tube (12) and pipe body (11) being sleeved in the outer side of the inner tube (12), the both ends of the inner tube (12) are tapered to form throat in middle position, so that the inside of the inner tube (12) forms Venturi passage; The throat is communicated with one end of the gas inlet pipe (14), the other end of the gas inlet pipe (14) is connected with one-way valve (13), the one-way valve (13) is arranged on the outside of the pipe body (11), and the gas outside can enter the inside of the inner tube (12) through the one-way valve (13); Further comprising rotating member (18) and swing member (16); The rotating member (18) is rotatably arranged on the gas inlet pipe (14), and the gas passing through the gas inlet pipe (14) can drive the rotating member (18) to rotate; The swing member (16) is arranged on the inner wall of the inner tube (12), the swing member (16) is connected with hydraulic element (17), and the rotating member (18) can intermittently drive the hydraulic element (17) to extrude the swing member (16) when rotating, so that the swing member (16) swings to disperse the agglomerated powder.

2. The anti-blocking structure according to claim 1, wherein, The hydraulic element (17) includes a first hydraulic cylinder (171), the first hydraulic cylinder (171) is arranged between the pipe body (11) and the inner tube (12), the first hydraulic cylinder (171) is communicated with annular pipeline (174) through vertical pipeline (172), and at least two second hydraulic cylinders (173) are arranged on the annular pipeline (174); The annular pipeline (174) is close to the both ends of the inner tube (12); The rotating member (18) intermittently drives the first hydraulic cylinder (171), and the second hydraulic cylinder (173) drives the swing member (16).

3. The anti-blocking structure according to claim 2, wherein, The first hydraulic cylinder (171) includes a cylinder body (1711), a first permanent magnet (1712) and a spring (1713) are arranged in the cylinder body (1711), and the spring (1713) provides elastic force to make the first permanent magnet (1712) close to the pipe wall of the pipe body (11).

4. The anti-blocking structure according to claim 3, wherein The rotating member (18) includes a sleeve pipe (181), the middle part of the gas inlet pipe (14) is completely disconnected, the sleeve pipe (181) is arranged at the disconnected position, so that the both ends of the sleeve pipe (181) are sleeved on the outer wall of the gas inlet pipe (14); Inner blades (184) are fixedly arranged on the inner wall of the sleeve pipe (181), and at least two second permanent magnets (183) are uniformly fixedly arranged on the outer wall of the sleeve pipe (181); The second permanent magnet (183) repels the first permanent magnet (1712).

5. The anti-blocking structure according to claim 4, wherein, A bearing (182) is arranged between the sleeve pipe (181) and the gas inlet pipe (14).

6. The anti-blocking structure according to claim 2, wherein The swing member (16) includes a fixed sheet (161), the fixed sheet (161) is fixed on the inner wall of the inner tube (12), one end of the fixed sheet (161) is hinged with one end of a frame (162), and the other end of the frame (162) is hinged with the second hydraulic cylinder (173).

7. The anti-blocking structure according to claim 1, wherein The air inlet pipe (14) is detachably provided with a drying plate (19), the drying plate (19) can dry the gas passing through the one-way valve (13), and the dried gas enters the inside of the inner layer pipe (12), so that the agglomeration of the humid powder can be reduced.

8. The anti-blocking structure according to claim 1, wherein Further comprising a deformation ring (15), the deformation ring (15) can stretch and contract along the axial direction of the pipe body (11), and can disperse the agglomerated powder.

9. A positive pressure pneumatic conveying device characterized by, A Roots blower (4) is communicated with a storage bin (5) through a conveying pipe (2), the conveying pipe (2) is provided with a feeding hopper (3), and the feeding hopper (3) is close to the Roots blower (4); The conveying pipe (2) is further provided with the anti-blocking structure according to any one of claims 1-8.

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