A device for inspecting a sewer pipe

Abstract

This invention provides a maintenance device for drainage pipes, comprising a maintenance robot and a remote control device. The maintenance robot includes a walking mechanism, a camera assembly, a first robotic arm with a grinding disc, and a second robotic arm with a glue injection head. Multiple cameras are mounted on the robot's casing to monitor the pipe's internal environment in real time. When a crack is encountered, glue from the material tank is pumped to the glue injection head, which sprays the glue onto the crack for repair. The grinding disc is used to grind the crack before spraying and to grind the solidified glue after spraying. The walking mechanism of this device is telescopic and rotatable, adapting to pipes of different diameters. It can quickly detect and locate cracks or damage on the inner wall of pipes and repair them without manual excavation, saving costs and increasing efficiency. It is also highly flexible and easy to use.

Description

Technical Field

[0001] This invention relates to the field of pipeline maintenance technology, and in particular to a device for intelligent maintenance of drainage pipelines. Background Technology

[0002] After sludge removal, many drainage pipes require inspection of their inner walls. Current inspection methods involve robots entering the pipes to photograph and capture cracks or damage, then sending the location to a remote control terminal. Once the location is confirmed, manual excavation is required for replacement or repair. This method is cumbersome, complex, and costly, and excavating important sections can cause traffic congestion and other accidents. There is currently no integrated inspection and repair device on the market that can inspect and repair the inner walls of pipes. Therefore, an automatic inspection and repair device for drainage pipes is needed. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the present invention provides a maintenance device for drainage pipes. The maintenance device includes a maintenance robot, which includes a housing composed of a battery box and a material box. A first robotic arm is fixed to the top of the battery box, and a grinding disc is installed at the end of the first robotic arm. A second robotic arm is installed at both the top and bottom of the material box, and a glue injection head is installed at the end of the second robotic arm.

[0004] The four corners of the inspection robot's shell are connected to a walking mechanism. The end of the walking mechanism away from the shell is equipped with a walking wheel, which presses against the inner wall of the drainage pipe to drive the inspection robot forward. The shell of the inspection robot is equipped with multiple cameras to observe the environment inside the pipe in real time. When a crack is encountered in the pipe, the adhesive in the raw material tank is pumped out to the adhesive injection head. The adhesive injection head is used to spray adhesive onto the crack to achieve repair. The grinding disc is used to grind the crack before spraying and to grind the solidified adhesive after spraying.

[0005] Preferably, the maintenance device further includes a remote control device, a control box fixed to the housing, and a cable connected to the control box. The remote control device consists of a display, a handle, control buttons, a signal transmitter, and a signal receiver. The remote control device is connected to the controller in the control box via wired or wireless means to control the operation of various components of the maintenance robot.

[0006] Preferably, the walking mechanism includes an arm connector, a slide groove, an electric telescopic rod, a slide bar, a wheel frame, a walking motor, a wheel hub, anti-skid tires, a connecting hole, a pin and a bearing, and an arm.

[0007] One end of the boom is welded with a boom connector, and a groove is opened inside the boom. One end of the electric telescopic rod is fixed to the end of the groove, and the other end is fixed to the end of the slide rod to drive the slide rod to slide in the groove. A wheel frame is installed at the end of the slide rod away from the boom. The wheel frame is equipped with a traveling wheel and a traveling motor. The traveling wheel includes a wheel hub and an anti-skid tire installed on its periphery.

[0008] Preferably, the four corners of the maintenance robot housing are provided with drive boxes, and a reduction gearbox is installed inside the drive box. A rotary motor is connected to one side of the reduction gearbox, and a connecting shaft is installed on the other side of the reduction gearbox. The connecting shaft is provided with a pin groove that matches the pin. The connecting shaft passes through the connecting hole in the middle of the arm connector, and the pin groove engages with the pin welded in the connecting hole. The rotation of the walking structure around the connecting shaft is achieved by the drive of the rotary motor.

[0009] Preferably, it also includes a fixing frame, which is located on two opposite end faces of the battery box and the raw material box and is positioned between the two drive boxes. The connecting shaft passes through the connecting hole and rests in the opening of the fixing frame, and is connected to the opening of the fixing frame through a bearing. The walking mechanism is mounted on the fixing frame through the connecting shaft and the bearing.

[0010] Preferably, a first camera is mounted at the center of the mounting bracket.

[0011] Preferably, a camera assembly is provided at the connection between the battery box and the raw material box. The camera assembly includes a fixing plate that is fixed to the surface of the maintenance robot housing by bolts. A fourth camera arranged along its length and lighting strips located on both sides of the fourth camera are fixed to the surface of the fixing plate.

[0012] Preferably, the first robotic arm includes a first robotic arm arm, a first robotic arm arm drive motor, a grinding motor, a grinding disc, and a second camera; a plurality of first robotic arm arms are connected to each other via the first robotic arm arm drive motor, the end of the first robotic arm arm is equipped with a grinding motor and a second camera, the grinding motor is equipped with a grinding disc, and the second camera is used for auxiliary alignment of the position to be ground.

[0013] Preferably, the second robotic arm includes a second robotic arm lever, a second robotic arm lever drive motor, a glue injection head, and a third camera; several second robotic arm levers are connected to each other via the second robotic arm lever drive motor, and the ends of the second robotic arm levers are equipped with glue injection heads and third cameras. The glue injection head is connected to a suction centrifugal pump in the raw material box via a material delivery pipe, and the third camera is used for auxiliary alignment of the position to be glued.

[0014] Preferably, the raw material box includes an outer box, an inner box, an electromagnetic coil, a pump box, a suction centrifugal pump, a gearbox, a stirring motor, a stirring rod, and a suction pipe; the inner box is fitted inside the outer box, and the pump box is located on the top of the inner box. The suction centrifugal pump is installed in the pump box to draw the adhesive material in the inner box to the dispensing head through the suction pipe; a gearbox is installed inside the pump box, on one side of the suction centrifugal pump. The stirring motor is connected to the top of the gearbox, and the stirring rod is connected to the bottom of the gearbox to stir the adhesive material in the inner box to prevent solidification; the electromagnetic coil is located in the gap between the inner box and the outer box to heat the adhesive material in the inner box.

[0015] As described above, this invention provides a maintenance device for drainage pipes. The device includes a maintenance robot and a remote control unit. The maintenance robot comprises a walking mechanism, a camera assembly, a first robotic arm with a grinding disc, and a second robotic arm with a glue injection head. Multiple cameras are mounted on the robot's casing to observe the pipe's internal environment in real time. When a crack is encountered, adhesive from the material tank is pumped to the glue injection head, which sprays adhesive onto the crack for repair. The grinding disc is used to grind the crack before spraying and to grind the solidified adhesive after spraying. The walking mechanism of this device is telescopic and rotatable, adapting to pipes of different diameters. It can quickly detect and locate cracks or damage on the pipe's inner wall and repair them without manual excavation, saving costs, increasing efficiency, and providing excellent repair results and quality. This device can perform real-time detection of any location on the pipe, avoiding missed detections, and can also repair any location on the pipe's inner wall. It is very simple to operate, highly flexible, has strong overall stability, and is easy to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the maintenance device of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the remote control device of the present invention.

[0018] Figure 3 This is a schematic diagram of the walking mechanism of the present invention.

[0019] Figure 4 This is a side view of the fourth camera and fixing plate of the present invention.

[0020] Figure 5 This is a front view of the fourth camera and fixing plate of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the first robotic arm of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the second robotic arm of the present invention.

[0023] Figure 8 This is a schematic diagram of the internal structure of the raw material box of the present invention.

[0024] Component designation explanation

[0025] Inspection Robot - 1, Battery Box - 2, Material Box - 3, First Robotic Arm - 4, Second Robotic Arm - 5, Walking Mechanism - 6, Fixing Frame - 7, Cable - 8, Drive Box - 9, Camera Components - 10, First Camera - 11, Remote Control Device - 12, Control Box - 13, Outer Box - 31, Inner Box - 32, Electromagnetic Coil - 33, Pump Box - 34, Suction Centrifugal Pump - 35, Gearbox - 36, Stirring Motor - 37, Stirring Rod - 38, Suction Pipe - 39, First Robotic Arm Stalk - 41, First Robotic Arm Stalk Drive Motor - 42, Grinding Motor - 43, Grinding Disc - 44, Second Camera - 45, Second Machine Robotic arm lever-51, second robotic arm lever drive motor-52, glue injection head-53, third camera-54, arm lever connector-61, slide groove-62, electric telescopic rod-63, slide bar-64, wheel frame-65, travel motor-66, wheel hub-67, anti-slip tire-68, connecting hole-69, pin-610, bearing-611, arm lever-612, gearbox-91, rotary motor-92, connecting shaft-93, pin groove-94, fourth camera-1001, fixing plate-1002, lighting strip-1003, display-1201, handle-1202, control button-1203. Detailed Implementation

[0026] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0027] In the detailed description of embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0028] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the drawings for the device in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The phrase “between” as used herein includes both endpoint values.

[0029] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0030] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] like Figures 1 to 8 As shown, the present invention provides a maintenance device for drainage pipes, including a maintenance robot 1;

[0032] The maintenance robot 1 includes a shell consisting of a battery box 2 and a material box 3. A first robotic arm 4 is fixed to the top of the battery box, and a grinding disc 44 is installed at the end of the first robotic arm 4. A second robotic arm 5 is installed at both the top and bottom of the material box 3, and a glue injection head 53 is installed at the end of the second robotic arm.

[0033] The four corners of the shell of the maintenance robot 1 are connected to the walking mechanism 6. The end of the walking mechanism 6 away from the shell is equipped with a walking wheel. The walking wheel is pressed against the inner wall of the drainage pipe to drive the maintenance robot 1 to move. The shell of the maintenance robot 1 is equipped with multiple cameras to observe the environment inside the pipe in real time. When a crack is encountered in the pipe, the adhesive in the raw material tank 3 is pumped out to the adhesive injection head 53. The adhesive injection head 53 is used to spray adhesive onto the crack to achieve repair. The grinding disc 44 is used to grind the crack before spraying and to grind the solidified adhesive after spraying.

[0034] The maintenance device also includes a remote control device 12, a control box 13 fixed to the housing, and a cable 8 connected to the control box 13. Figure 2As shown, the remote control device 12 consists of a display 1201, a handle 1202, a control button 1203, a signal transmitter, and a signal receiver. The remote control device 12 is connected to the controller in the control box 13 via wired or wireless means to control the operation of various components of the maintenance robot.

[0035] Furthermore, such as Figure 3 As shown, the walking mechanism 6 includes an arm connector 61, a slide groove 62, an electric telescopic rod 63, a slide rod 64, a wheel frame 65, a walking motor 66, a wheel hub 67, an anti-skid tire 68, a connecting hole 69, a pin 610, a bearing 611, and an arm 612.

[0036] One end of the boom 612 is welded with a boom connector 61, which is connected to the boom 612. A groove 62 is provided inside the boom 612. One end of the electric telescopic rod 63 is fixed to the end of the groove 62, and the other end is fixed to the end of the slide rod 64 to drive the slide rod 64 to slide in the groove 62. A wheel frame 65 is installed at the end of the slide rod 64 away from the boom 612. The wheel frame 65 is equipped with a traveling wheel and a traveling motor 66. The traveling wheel includes a wheel hub 67 and an anti-skid tire 68 installed around it.

[0037] Furthermore, drive boxes 9 are provided at the four apex corners of the shell of the maintenance robot 1. A reduction gearbox 91 is installed inside the drive box 9. A rotary motor 92 is connected to one side of the reduction gearbox 91, and a connecting shaft 93 is installed on the other side of the reduction gearbox 91. The connecting shaft 93 has a pin groove 94 that matches the pin 610. The connecting shaft 93 passes through the connecting hole 69 in the middle of the arm connector 61. The pin groove 94 engages with the pin 610 welded in the connecting hole 69. The rotation of the walking structure 6 around the connecting shaft 93 is achieved by the drive of the rotary motor 92.

[0038] Furthermore, such as Figure 1 As shown, it also includes a fixing frame 7, which is located on two opposite ends of the battery box 2 and the raw material box 3 and is positioned between the two drive boxes 9. The connecting shaft 93 passes through the connecting hole 69 and is mounted in the opening of the fixing frame 7, and is connected to the opening of the fixing frame 7 through the bearing 611. The walking mechanism 6 is mounted on the fixing frame 7 through the connecting shaft 93 and the bearing 611.

[0039] Furthermore, a first camera 11 is mounted at the center of the mounting bracket 7.

[0040] Furthermore, a camera assembly 10 is provided at the connection between the battery box 2 and the raw material box 3 (in the middle of the robot housing), such as... Figure 4 , Figure 5As shown, the shooting assembly 10 includes a fixing plate 1002 that is fixed to the surface of the maintenance robot housing by bolts. A fourth camera 1001 arranged along its length and lighting strips 1003 located on both sides of the fourth camera 1001 are fixed to the surface of the fixing plate 1002.

[0041] Furthermore, such as Figure 6 As shown, the first robotic arm 4 includes a first robotic arm lever 41, a first robotic arm lever drive motor 42, a grinding motor 43, a grinding disc 44, and a second camera 45. Several first robotic arm levers 41 are connected to each other through the first robotic arm lever drive motor 42. The grinding motor 43 and the second camera 45 are installed at the ends of the first robotic arm levers 41. The grinding disc 44 is installed on the grinding motor 43, and the second camera 45 is used for auxiliary alignment of the position to be ground.

[0042] Furthermore, such as Figure 7 As shown, the second robotic arm 5 includes a second robotic arm lever 51, a second robotic arm lever drive motor 52, a glue injection head 53, and a third camera 54; several second robotic arm levers 51 are connected to each other through the second robotic arm lever drive motor 52, and the end of the second robotic arm lever 51 is equipped with a glue injection head 53 and a third camera 54. The glue injection head 53 is connected to the suction centrifugal pump 35 in the raw material box 3 through a material delivery pipe, and the third camera 45 is used for auxiliary alignment of the position to be glued.

[0043] Furthermore, the raw material box includes an outer box 31, an inner box 32, an electromagnetic coil 33, a pump box 34, a suction centrifugal pump 35, a gearbox 36, a stirring motor 37, a stirring rod 38, and a suction pipe 39; the inner box 32 is fitted inside the outer box 31, and the pump box 34 is provided on the top of the inner box 32. The suction centrifugal pump 35 is installed in the pump box 34 to draw the adhesive material in the inner box to the dispensing head 53 through the suction pipe 39; the gearbox 36 is installed inside the pump box 34 and on one side of the suction centrifugal pump 35. The stirring motor 37 is connected to the top of the gearbox 36, and the stirring rod 38 is connected to the bottom of the gearbox 36 to stir the adhesive material in the inner box to prevent solidification; the electromagnetic coil 33 is located in the gap between the inner box 32 and the outer box 31 to heat the adhesive material in the inner box.

[0044] The working process of the above-mentioned maintenance device is as follows: After cleaning the impurities on the inner wall of the pipe, the device is used to control the rotation motors 92 in the four drive boxes 9 of the maintenance robot 1 through the control button 1203 on the remote control device 12 according to the diameter of the drainage pipe. This drives the gears in the reduction gearbox 91 to rotate, thereby driving the connecting shaft 93 to rotate, which in turn drives the arm connector 61 to rotate. By rotating the arm connector 61, the angle of the anti-slip tire 68 is adjusted. Then, the electric telescopic rod 63 is powered on to push the slide rod 64 to move. By moving the slide rod 64, the anti-slip tire 68 is brought into contact with the inner wall of the drainage pipe. The robot touches the ground, then powers on the walking motor 66, which in turn rotates the hub 67. The hub 67 then rotates the anti-slip tires 68, moving the entire inspection robot 1 forward. Simultaneously, several fourth cameras 1001 on the pipe inner wall imaging device 10 capture images of the drainage pipe's inner wall. When the cameras detect cracks in the pipe's inner wall, the video is transmitted back to the monitor 1201. Then, the operator uses the control buttons 1203 on the remote control device 12 to control the first robotic arm 4's arm drive motor 42, thus moving the first robotic arm 4 forward. The robotic arm 41 moves, using the second camera 45 to align with the crack location. Then, the grinding motor 43 at one end of the first robotic arm 41 operates, driving the grinding disc 44 to rotate and grind the crack on the inner wall of the pipe. Next, the second robotic arm 51 is driven by the second robotic arm drive motor 52, aligning the glue injection head 53 at one end of the second robotic arm 51 with the crack. With the assistance of the third camera 54, the exact location is determined. Then, the suction centrifugal pump 35 draws the adhesive from the inner tank 32 to the glue injection head 53, spraying the adhesive onto the crack. After the adhesive solidifies... The first robotic arm 4 works to grind away excess adhesive material with a grinding disc 44, thus completing the repair. The adhesive material in the inner box 32 is heated by an electromagnetic coil 33, which heats up quickly and prevents the adhesive from solidifying. At the same time, the first motor 37 drives the gears in the gearbox 36 to rotate, which in turn drives the stirring rod 38 to stir the adhesive material and prevent it from solidifying. This equipment can repair any part of the inner wall of the drainage pipe. The fourth camera 1001 and the lighting panel 1003 at the front and rear of the inspection robot 1 take pictures of the front and rear of the pipe, so that the staff can see the internal condition of the pipe clearly.

[0045] In summary, this invention provides a maintenance device for drainage pipes. The device includes a maintenance robot and a remote control unit. The maintenance robot comprises a walking mechanism, a camera assembly, a first robotic arm with a grinding disc, and a second robotic arm with a glue injection head. Multiple cameras are mounted on the robot's casing to observe the pipe's internal environment in real time. When a pipe crack is encountered, adhesive from the material tank is pumped to the glue injection head, which sprays adhesive onto the crack for repair. The grinding disc is used to grind the crack before spraying and to grind the solidified adhesive after spraying. The walking mechanism of this device is telescopic and rotatable, adapting to pipes of different diameters. It can quickly detect and locate cracks or damage on the pipe's inner wall and repair them without manual excavation, saving costs, increasing efficiency, and providing excellent repair results and quality. This device can perform real-time detection at any location on the pipe, avoiding missed detections, and can also repair any location on the pipe's inner wall. It is very simple to operate, highly flexible, has strong overall stability, and is easy to use.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A maintenance device for drainage pipes, characterized in that, The maintenance device includes a maintenance robot, which includes a housing consisting of a battery box and a material box. A first robotic arm is fixed to the top of the battery box, and a grinding disc is installed at the end of the first robotic arm. A second robotic arm is installed at both the top and bottom of the material box, and a glue injection head is installed at the end of the second robotic arm. The four corners of the inspection robot's shell are connected to a walking mechanism. The end of the walking mechanism away from the shell is equipped with a walking wheel. The walking wheel is pressed against the inner wall of the drainage pipe to drive the inspection robot to move. The shell of the inspection robot is equipped with multiple cameras to observe the environment inside the pipe in real time. When a crack is encountered in the pipe, the adhesive in the raw material tank is pumped out to the adhesive injection head. The adhesive injection head is used to spray adhesive onto the crack to achieve repair. The grinding disc is used to grind the crack before spraying and to grind the solidified adhesive after spraying. The walking mechanism includes a boom connector, a slide groove, an electric telescopic boom, a slide bar, a wheel frame, a walking motor, a wheel hub, anti-skid tires, connecting holes, pins and bearings, and a boom. One end of the arm is welded with an arm connector, and a groove is formed inside the arm. One end of the electric telescopic rod is fixed to the end of the groove, and the other end is fixed to the end of the sliding rod to drive the sliding rod to slide in the groove. A wheel frame is installed at the end of the sliding rod away from the arm. The wheel frame is equipped with a walking wheel and a walking motor. The walking wheel includes a wheel hub and an anti-slip tire installed around it. A drive box is provided at the four top corners of the shell of the maintenance robot. A reduction gearbox is installed inside the drive box. A rotary motor is connected to one side of the reduction gearbox, and a connecting shaft is installed on the other side of the reduction gearbox. The connecting shaft has a pin groove that matches the pin. The connecting shaft passes through the connecting hole in the middle of the arm connector. The pin groove and the pin welded in the connecting hole are engaged. The rotation of the walking structure around the connecting shaft is achieved by the drive of the rotary motor.

2. The maintenance device according to claim 1, characterized in that, The maintenance device also includes a remote control device, a control box fixed to the housing, and a cable connected to the control box. The remote control device consists of a display, handle, control buttons, a signal transmitter, and a signal receiver. The remote control device is connected to the controller in the control box via wired or wireless means to control the operation of each component of the maintenance robot.

3. The maintenance device according to claim 1, characterized in that, The maintenance device also includes a fixed frame, which is located on two opposite ends of the battery box and the raw material box and is positioned between the two drive boxes. The connecting shaft passes through the connecting hole and rests in the opening of the fixed frame, and is connected to the opening of the fixed frame through a bearing. The walking mechanism is mounted on the fixed frame through the connecting shaft and the bearing.

4. The maintenance device according to claim 3, characterized in that, The first camera is mounted at the center of the mounting frame.

5. The maintenance device according to claim 1, characterized in that, A camera assembly is provided at the connection between the battery box and the raw material box. The camera assembly includes a fixing plate that is fixed to the surface of the maintenance robot housing by bolts. A fourth camera arranged along its length and lighting strips located on both sides of the fourth camera are fixed to the surface of the fixing plate.

6. The maintenance device according to claim 1, characterized in that, The first robotic arm includes a first robotic arm arm, a first robotic arm arm drive motor, a grinding motor, a grinding disc, and a second camera; several first robotic arm arms are connected to each other via the first robotic arm arm drive motors, and the grinding motor and the second camera are installed at the ends of the first robotic arm arms. The grinding disc is installed on the grinding motor, and the second camera is used for auxiliary alignment of the position to be ground.

7. The maintenance device according to claim 1, characterized in that, The second robotic arm includes a second robotic arm arm, a second robotic arm arm drive motor, a glue injection head, and a third camera; several second robotic arm arms are connected to each other via the second robotic arm arm drive motor, and the ends of the second robotic arm arms are equipped with glue injection heads and third cameras. The glue injection head is connected to a suction centrifugal pump in the raw material box via a material delivery pipe, and the third camera is used for auxiliary alignment of the position to be glued.

8. The maintenance device according to claim 1, characterized in that, The raw material box includes an outer box, an inner box, an electromagnetic coil, a pump box, a suction centrifugal pump, a gearbox, a stirring motor, a stirring rod, and a suction pipe. The inner box is fitted inside the outer box, and the pump box is located on the top of the inner box. The suction centrifugal pump is installed in the pump box to draw the adhesive material in the inner box to the dispensing head through the suction pipe. The gearbox is installed inside the pump box, on one side of the suction centrifugal pump. The stirring motor is connected to the top of the gearbox, and the stirring rod is connected to the bottom of the gearbox to stir the adhesive material in the inner box to prevent solidification. The electromagnetic coil is located in the gap between the inner box and the outer box to heat the adhesive material in the inner box.

Images