A pipe cleaning device

Abstract

The utility model discloses a kind of pipe cleaning device, including 90 elbow and controller, the bottom of 90 elbow inlet front horizontal pipe is equipped with pressure sensor, rotating cutting mechanism is installed on the outer tube wall of 90 elbow, and the rotating cutting mechanism includes lower shell, upper shell, driving assembly and telescopic blade, and the lower shell is penetrated and slidingly connected on the outer tube wall of 90 elbow.The utility model sets up pressure sensor and monitors the pressure change of pipe inlet front horizontal pipe bottom in real time, when material blockage leads to pressure surge, signal transmission is to controller;After controller receives signal, instruction is sent to driving assembly, telescopic mechanism, air jet device simultaneously, telescopic mechanism pushes lower shell and upper shell to slide to pipe, so that rotating cutting mechanism reaches pipe outer side accumulation area, driving assembly drives telescopic blade to extend from opening and drives it to rotate with upper shell, cutting blockage, while air jet device auxiliary cleaning, solve the problem of pipe blockage.

Description

Technical Field

[0001] This utility model belongs to the field of pipe unblocking technology, and in particular relates to a pipe unblocking device. Background Technology

[0002] When the material is conveyed upwards from the horizontal section to the vertical section in a 90° bend, the material tends to shift outwards due to the smaller radius of curvature on the inner side and the larger radius of curvature on the outer side. This can easily create a "dead zone accumulation area" on the outer side, leading to blockage of the bend.

[0003] For example, corn threshing byproducts (such as corn cob fragments, straw fragments, husks, corn silk, and corn kernel fragments) are characterized by uneven particle size (2-50mm), easy suspension of lightweight materials (straw, husks, and corn silk), and easy settling of heavy particles (corn cob). Due to the inertial centrifugal force at the 90° bend, they are prone to accumulation (settling of heavy particles) and adhesion to the wall (linking of lightweight materials) on the outside of the bend (area with a larger radius of curvature). Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a device for clearing blockages in bend pipes.

[0005] To solve the above problems, the present invention adopts the following technical solution: A pipe unblocking device includes a 90° bend and a controller. A pressure sensor is installed at the bottom of a horizontal pipe before the inlet of the 90° bend. A rotary cutting mechanism is installed on the outer wall of the 90° bend. The rotary cutting mechanism includes a lower housing, an upper housing, a drive assembly, and a telescopic blade. The lower housing is slidably connected to the outer wall of the 90° bend. The upper housing is connected to the top of the lower housing. The telescopic blade is connected inside the upper housing. An opening for the telescopic blade to extend is provided on the side wall of the upper housing. The drive assembly is disposed inside the lower housing and connected to the telescopic blade for driving the telescopic blade to extend or enter the upper housing and for driving the telescopic blade and the upper housing to rotate. A telescopic mechanism is connected to the bottom of the lower housing for pushing the lower housing to slide in and out of the 90° bend. An air jet device is installed on the inner wall of the 90° bend. The controller is electrically connected to the pressure sensor, the drive assembly, the telescopic mechanism, and the air jet device.

[0006] Preferably, the jetting device jets air at a 45° angle toward the 90° bend in the pipe.

[0007] Preferably, the jetting device includes several air holes formed on the inner wall of the 90° bend, an air collection hood, an air pipe, an air pump, and a pulse valve. The axial direction of the air holes forms a 45° angle with the axial direction of the horizontal pipe. The air collection hood is connected to the outer surface of the 90° bend and covers all the air holes. One end of the air pipe is connected to the air pump, and the other end is connected to the air collection hood. The pulse valve is installed on the air pipe and is electrically connected to the controller.

[0008] Preferably, there are three telescopic blades, which are evenly distributed along the circumference of the upper housing.

[0009] Preferably, the drive assembly includes a motor, a gear, a rack, limit blocks, and a limit rod. The motor is housed within the lower housing. The gear is connected to the motor's output shaft. The rack is connected to the front side of the telescopic blade. Three telescopic blades are evenly distributed around the circumference of the gear. The racks of the three telescopic blades mesh with the gears respectively. When the motor drives the gear to rotate forward or backward, the rack drives the telescopic blade to extend or enter the opening of the upper housing. The limit rod is connected to the upper housing and abuts against the back of the telescopic blade. Two limit blocks are located on the back of the telescopic blade at both ends of the rack. The limit rod is located between the two limit blocks. When the gear rotates forward or backward, causing the rack to slide back and forth, the limit rod blocks the two limit blocks. The motor is electrically connected to the controller.

[0010] Preferably, a limiting wheel is fitted onto the limiting rod.

[0011] Preferably, when the telescopic mechanism retracts, the top of the upper housing blocks the opening of the outer wall of the 90° bend, and the top of the upper housing is an arc-shaped protrusion protruding from the inner surface of the outer wall of the 90° bend.

[0012] Preferably, the pressure sensor is installed 100mm before the inlet of the 90° bend.

[0013] Preferably, the jetting device is located 150 mm after the inlet of the 90° bend.

[0014] Preferably, the pressure sensor is a piezoresistive pressure sensor, the telescopic mechanism is an electric push rod, and the controller is a PLC programmable controller.

[0015] The beneficial effects of this utility model are: Compared with existing technologies, the advantages of this utility model are: This invention uses a pressure sensor to monitor pressure changes at the bottom of the horizontal pipe before the bend inlet in real time. When material blockage causes a sudden pressure increase, the signal is transmitted to the controller. After receiving the signal, the controller simultaneously sends instructions to the drive assembly, telescopic mechanism, and jet device. The telescopic mechanism pushes the lower and upper housings to slide into the 90° bend, allowing the rotary cutting mechanism to reach the accumulation area outside the 90° bend. The drive assembly drives the telescopic blade to extend from the opening and rotate it with the upper housing to cut the blockage. At the same time, the jet device assists in cleaning, thus solving the problem of blockage in the 90° bend. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the rotary cutting mechanism of this utility model during operation; Figure 4 , 5 This is an exploded view of the components of the rotary cutting mechanism of this utility model; Figure 6 for Figure 2 A magnified view of a portion of point A in the middle.

[0017] In the diagram: 1. 90° bend; 2. Pressure sensor; 3. Rotary cutting mechanism; 31. Lower housing; 32. Upper housing; 321. Opening; 33. Drive assembly; 331. Motor; 332. Gear; 333. Rack; 334. Limiting block; 335. Limiting rod; 336. Limiting wheel; 34. Telescopic blade; 4. Telescopic mechanism; 5. Jet device; 51. Air hole; 52. Air collection hood. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1-6As shown, this utility model provides a technical solution: a 90° bend pipe 1 unblocking device, including a 90° bend pipe 1 and a controller. A pressure sensor 2 is installed at the bottom of the horizontal pipe before the inlet of the 90° bend pipe 1. A rotary cutting mechanism 3 is installed on the outer wall of the 90° bend pipe 1. The rotary cutting mechanism 3 includes a lower housing 31, an upper housing 32, a drive assembly 33, and a telescopic blade 34. The lower housing 31 is slidably connected to the outer wall of the 90° bend pipe 1, the upper housing 32 is connected to the top of the lower housing 31, and the telescopic blade 34 is connected inside the upper housing 32. The upper housing 32 has an opening 321 on its side wall for the extension of the telescopic blade 34. The drive assembly 33 is located inside the lower housing 31 and connected to the telescopic blade 34 for driving the telescopic blade 34 to extend or enter the upper housing 32 and for driving the telescopic blade 34 and the upper housing 32 to rotate. The bottom of the lower housing 31 is connected to a telescopic mechanism 4 for pushing the lower housing 31 to slide in and out of the 90° bend 1. An air jet device 5 is installed on the inner wall of the 90° bend 1. The controller is electrically connected to the pressure sensor 2, the drive assembly 33, the telescopic mechanism 4, and the air jet device 5.

[0020] This invention uses a pressure sensor 2 to monitor the pressure changes at the bottom of the horizontal pipe before the inlet of the 90° bend 1 in real time. When material blockage causes a sudden pressure increase (for example, in the conveying of corn threshing materials, the normal pressure is 0.1-0.2 MPa, but when blocked, the pressure can suddenly rise to over 0.3 MPa), a signal is transmitted to the controller. After receiving the signal, the controller synchronously sends instructions to the drive assembly 33, the telescopic mechanism 4, and the jetting device 5. The telescopic mechanism 4 pushes the lower housing 31 and the upper housing 32 to slide into the 90° bend 1 (in specific implementation, the telescopic mechanism 4 needs to be fixed on the frame used to support the pipe), so that the rotary cutting mechanism 3 reaches the accumulation area outside the 90° bend 1. The drive assembly 33 drives the telescopic blade 34 to extend from the opening 321 and rotate it with the upper housing 32 to cut the blockage. At the same time, the jetting device 5 assists in cleaning, solving the problem of blockage in the 90° bend 1. After the blockage is cleared, the controller controls each component to reset.

[0021] Furthermore, the jetting device 5 jets air into the 90° bend 1 at a 45° angle. This 45° angled jetting ensures the airflow has both a normal component (perpendicular to the main material flow direction) and a tangential component (parallel to the main material flow direction). The tangential component propels the cut debris along the 90° bend 1, preventing secondary blockages caused by debris remaining within the bend. The normal component impacts lumpy or agglomerated materials, breaking up adhesion and dispersing the material evenly. Simultaneously, it washes the inner wall of the 90° bend 1, removing lightweight material adhering to the wall. Moreover, the 45° angled jetting can form an air film between the material and the pipe wall to some extent, acting as a buffer, reducing direct friction and impact on the pipe wall, thereby reducing pipe wear and maintenance costs.

[0022] Specifically, the jetting device 5 includes several air holes 51 formed on the inner wall of the 90° bend 1, a gas collecting hood 52, an air pipe, an air pump, and a pulse valve. The axial direction of the air holes 51 forms a 45° angle with the axial direction of the horizontal pipe. The gas collecting hood 52 is connected to the outer surface of the 90° bend 1 and covers all the air holes 51. One end of the air pipe is connected to the air pump, and the other end is connected to the gas collecting hood 52. The pulse valve is installed on the air pipe and is electrically connected to the controller. During operation, the controller controls the pulse valve to open and close periodically. The high-pressure airflow generated by the air pump is delivered to the gas collecting hood 52 through the air pipe and then injected into the 90° bend 1 along the 45° axial direction of the air holes 51. The periodic action of the pulse valve makes the airflow pulsed. Compared with continuous jetting, the pulsed airflow has a stronger instantaneous impact force on the blockage and can reduce unnecessary energy consumption.

[0023] Specifically, there are three telescopic blades 34, which are evenly distributed along the circumference of the upper housing 32. The drive assembly 33 includes a motor 331, a gear 332, a rack 333, a limiting block 334, and a limiting rod 335. The motor 331 is located inside the lower housing 31. The gear 332 is connected to the output shaft of the motor 331. The rack 333 is connected to the front side of the telescopic blades 34. The three telescopic blades 34 are evenly distributed along the circumference of the gear 332, and the racks 333 of the three telescopic blades 34 mesh with the gear 332 respectively. When the motor 331 drives the gear 332 to rotate forward or reverse, the rack 333 drives the telescopic blade 34 to extend or enter the opening 321 of the upper housing 32. The limiting rod 335 is connected to the upper housing 32 and abuts against the back of the telescopic blade 34. Two limiting blocks 334 are set on the back of the telescopic blade 34 and located at both ends of the rack 333. The limiting rod 335 is located between the two limiting blocks 334. When the gear 332 rotates forward or reverse and drives the rack 333 to slide back and forth, the limiting rod 335 blocks the two limiting blocks 334. The motor 331 is electrically connected to the controller. During operation, the controller controls the motor 331 to rotate forward, which drives the gear 332 to rotate. The gear 332, through meshing with three racks 333, synchronously drives the three telescopic blades 34 to extend along the opening 321. When a limiting block 334 on the back of the telescopic blade 34 abuts against the limiting rod 335, the limiting rod 335 prevents the telescopic blade 34 from extending further, preventing the telescopic blade 34 from extending too far and causing the gear 332 to disengage from the racks 333 and be damaged. At this time, the telescopic blade 34 is relatively fixed to the upper housing 32. The motor 331 continues to rotate forward, driving the telescopic blade 34 and the upper housing 32 to rotate and achieve rotary cutting. When the motor 331 rotates in reverse, the gear 332 rotates in the opposite direction, driving the telescopic blade 34 to retract through the racks 333 until another limiting block 334 abuts against the limiting rod 335, thus resetting the telescopic blade 34.

[0024] Furthermore, a limiting wheel 336 is fitted onto the limiting rod 335. When the telescopic blade 34 extends or retracts, its back contacts the limiting wheel 336, converting the original sliding friction into rolling friction, which greatly reduces the frictional resistance and wear between the telescopic blade 34 and the limiting rod 335.

[0025] Furthermore, when the telescopic mechanism 4 retracts, the top of the upper housing 32 seals the opening on the outer wall of the 90° bend 1. The top of the upper housing 32 is an arc-shaped protrusion (3-5mm high) extending from the inner surface of the outer wall of the 90° bend 1. This protrusion resists wear caused by material flow without obstructing the normal turning flow of material within the 90° bend 1. During material conveying, the material preferentially contacts and rubs against the arc-shaped protrusion, avoiding direct wear on the 90° bend 1 body.

[0026] Specifically, the pressure sensor 2 is installed 100mm before the inlet of the 90° bend 1. This installation position is at the front end of the material entering the 90° bend 1. When a blockage occurs in the 90° bend 1, the blockage will accumulate in front of the inlet of the 90° bend 1, causing the pressure in this area to rise first. The pressure sensor 2 can detect the pressure change in advance and issue a blockage warning signal earlier, giving time for clearing the blockage.

[0027] Specifically, the jetting device 5 is located 150mm after the inlet of the 90° bend 1. This position is in the area where the material has just entered the 90° bend 1 and is about to begin turning. It is the initial position where the material begins to deviate due to centrifugal force and is prone to accumulating. The jetting device 5 sprays air at this position, which can promptly impact the material that has just begun to accumulate. It is also located before the rotary cutting mechanism 3, which can blow away the material fragments cut by the rotary cutting mechanism 3.

[0028] Specifically, the pressure sensor 2 is a piezoresistive pressure sensor, the telescopic mechanism 4 is an electric push rod, and the controller is a PLC programmable controller.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe bend unblocking device, comprising a 90° bend (1) and a controller, characterized in that, A pressure sensor (2) is installed at the bottom of the horizontal pipe before the inlet of the 90° bend (1). A rotary cutting mechanism (3) is installed on the outer wall of the 90° bend (1). The rotary cutting mechanism (3) includes a lower housing (31), an upper housing (32), a drive assembly (33), and a telescopic blade (34). The lower housing (31) is slidably connected to the outer wall of the 90° bend (1). The upper housing (32) is connected to the top of the lower housing (31). The telescopic blade (34) is connected inside the upper housing (32). The side wall of the upper housing (32) is provided for the telescopic blade (34) to extend. The opening (321) is provided. The drive assembly (33) is located inside the lower housing (31) and connected to the telescopic blade (34) for driving the telescopic blade (34) to extend or enter the upper housing (32) and for driving the telescopic blade (34) and the upper housing (32) to rotate. The bottom of the lower housing (31) is connected to a telescopic mechanism (4) for pushing the lower housing (31) to slide in and out of the 90° bend (1). An air jet device (5) is installed on the inner wall of the 90° bend (1). The controller is electrically connected to the pressure sensor (2), the drive assembly (33), the telescopic mechanism (4), and the air jet device (5).

2. The pipe unblocking device according to claim 1, characterized in that, The jet device (5) jets air into the 90° bend (1) at a 45° angle.

3. The pipe unblocking device according to claim 1, characterized in that, The jet device (5) includes several air holes (51) opened on the inner wall of the 90° bend (1), an air collection hood (52), an air pipe, an air pump and a pulse valve. The axial direction of the air holes (51) forms a 45° angle with the axial direction of the horizontal pipe. The air collection hood (52) is connected to the outer surface of the 90° bend (1) and covers all the air holes (51). One end of the air pipe is connected to the air pump and the other end is connected to the air collection hood (52). The pulse valve is installed on the air pipe and is electrically connected to the controller.

4. The pipe unblocking device according to claim 1, characterized in that, There are three telescopic blades (34), which are evenly distributed along the circumference of the upper shell (32).

5. A pipe unblocking device according to claim 4, characterized in that, The drive assembly (33) includes a motor (331), a gear (332), a rack (333), a limiting block (334), and a limiting rod (335). The motor (331) is located inside the lower housing (31). The gear (332) is connected to the output shaft of the motor (331). The rack (333) is connected to the front side of the telescopic blades (34). The three telescopic blades (34) are evenly distributed around the circumference of the gear (332). The racks (333) of the three telescopic blades (34) mesh with the gears (332) respectively. When the motor (331) drives the gear (332) to rotate forward or backward... The rack (333) drives the telescopic blade (34) to extend or enter the opening (321) of the upper housing (32). The limiting rod (335) is connected to the upper housing (32) and abuts against the back of the telescopic blade (34). Two limiting blocks (334) are set on the back of the telescopic blade (34) and located at both ends of the rack (333). The limiting rod (335) is located between the two limiting blocks (334). When the gear (332) rotates forward or reverse and drives the rack (333) to slide back and forth, the limiting rod (335) blocks the two limiting blocks (334). The motor (331) is electrically connected to the controller.

6. The pipe unblocking device according to claim 5, characterized in that, A limiting wheel (336) is fitted onto the limiting rod (335).

7. The pipe unblocking device according to claim 1, characterized in that, When the telescopic mechanism (4) retracts, the top of the upper housing (32) is sealed at the opening of the outer wall of the 90° bend (1). The top of the upper housing (32) is an arc-shaped protrusion protruding from the inner surface of the outer wall of the 90° bend (1).

8. The pipe unblocking device according to claim 1, characterized in that, The pressure sensor (2) is installed 100 mm before the inlet of the 90° bend (1).

9. A pipe unblocking device according to claim 1, characterized in that, The jet device (5) is located 150 mm after the inlet of the 90° bend (1).

10. A pipe unblocking device according to claim 1, characterized in that, The pressure sensor (2) is a piezoresistive pressure sensor, the telescopic mechanism (4) is an electric push rod, and the controller is a PLC programmable controller.

Images