An automatic cleaning device and cleaning method for PVC material conveying pipes

Abstract

This invention relates to an automatic cleaning device for PVC material conveying pipes, comprising a device head, a mounting base, and a brush tube. The device head includes a connecting rod, and bristles are fixed to the surface of the brush tube. A thermoelectric semiconductor is fixed between the first and second ends of the connecting rod, and a heat insulation layer is sandwiched between the first and second temperature ends of the thermoelectric semiconductor. A caster wheel is mounted on the first temperature end. A temperature sensor is mounted on one side of the thermoelectric semiconductor, and an auxiliary material removal device is mounted on the other side. The automatic cleaning device and method for PVC material conveying pipes provided by this invention can solve the technical problem that, because the materials conveyed by PVC material conveying pipes are high-temperature materials, the material remaining inside the pipes is mostly viscous. If a cutting block is used for direct removal, the cutting block easily adheres to the material, making it difficult to remove and causing material stagnation and blockage, potentially leading to safety accidents.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning technology, specifically to an automatic cleaning device and method for PVC material conveying pipes. Background Technology

[0002] Using PVC material conveying pipes to transport materials can improve the efficiency of material transportation, reduce labor costs, and simplify the conveying process. However, after the materials are transported, there will be material residue inside the PVC material conveying pipes. This residue can cause pipe blockage, thereby increasing the system failure rate and even leading to safety accidents.

[0003] Chinese patent application No. 202111564424.7 discloses a pipe cleaning structure and device. This device uses a flexible cable with a cutting block connected to its outer circumference. A motor rotates the flexible cable around the motor's drive rod axis, forming a spindle-shaped working area. The cutting block then cuts the material, removing any residue. However, while this application can remove material using the cutting block, the materials transported in PVC material conveying pipes are often at high temperatures, resulting in viscous residue inside the pipes. Using the device described in this application can cause the cutting block to adhere to the material, making removal difficult and leading to blockages and potential safety hazards. Furthermore, this cutting structure can easily leave irreparable scratches on the inner surface of the pipe, making it rougher over time and more prone to material blockages.

[0004] Therefore, existing technologies have shortcomings and need to be improved and developed. Summary of the Invention

[0005] This invention provides an automatic cleaning device and method for PVC material conveying pipes, which solves the technical problem in the prior art where the materials conveyed by PVC material conveying pipes are high-temperature materials, and the materials remaining inside the pipes are mostly viscous. If a cutting block is used to remove them directly, the cutting block is easy to stick to the material, making it difficult to remove the material, which in turn causes material retention and blockage, and also makes the inside of the pipe rougher, leading to safety accidents.

[0006] To achieve the above objectives, in a first aspect, this invention provides an automatic cleaning device for PVC material conveying pipes, comprising a device head, a mounting base, and a brush tube. The device head is threaded to one end of the mounting base, and the brush tube is connected to the other end of the mounting base. The device head includes a connecting rod, and bristles are fixed on the surface of the brush tube. The two ends of the connecting rod are defined as a first end and a second end, respectively. Threads are provided on the first end and the second end. A thermoelectric semiconductor is fixed between the first end and the second end. A first temperature end and a second temperature end of the thermoelectric semiconductor are sleeved on the connecting rod. The first temperature end is sleeved on the second temperature end 106, and the first temperature end and the second temperature end 106 are connected in series to achieve heat transfer. By controlling the direction of current flow, cooling or heating is achieved at the first temperature end. A heat insulation layer is sandwiched between the first temperature end and the second temperature end, and a caster wheel is installed on the circumferential surface of the first temperature end. A temperature sensor is mounted on the side of the thermoelectric semiconductor facing the first end. An auxiliary material removal device is mounted on the connecting rod on the side of the thermoelectric semiconductor facing the second end. There is at least one auxiliary material removal device on the device head. Each auxiliary material removal device includes one material removal component, two support rods, and at least two limiting blocks. The limiting blocks are fixed on the connecting rod and located between the threads of the thermoelectric semiconductor and the second end. One support rod is fixed to each end of the material removal component. The end of the support rod near the thermoelectric semiconductor that is not connected to the material removal component is fixed to the connecting rod. The end of the support rod near the second end that is not connected to the material removal component is detachably connected to the limiting block. When the end of the support rod near the second end that is not connected to the material removal component is connected to the limiting block closest to the second end, the distance between the material removal component and the connecting rod is less than the distance between the first temperature end and the connecting rod.

[0007] Furthermore, the material removal component is at least one of a cutting block and a vibrator. When the material removal component is a cutting block, the cutting direction of the cutting block is the same as the traveling direction of the equipment head. When the material removal component is a vibrator, the vibrator is a storage-type vibrator.

[0008] Furthermore, metal bristles are fixed on the brush tube, and the length of the metal bristles is shorter than the length of the brush bristles.

[0009] Furthermore, an electrical conduit is installed inside the brush tube, and the end of the brush tube away from the mounting base is connected to the drive rod of the motor. When the motor is working, the drive rod is used to drive the brush tube to rotate.

[0010] Furthermore, one end of the electrical conduit is fixed to the mounting base and airtightly connected to the connecting rod, the other end of the electrical conduit extends out of the brush tube, a liquid storage cavity is formed between the brush tube and the electrical conduit, an inlet pipe is installed at the end of the brush tube away from the mounting base, an outlet is opened on the surface of the brush tube, and a gravity valve is installed on the outlet.

[0011] Furthermore, the brush tube is an integral brush tube, the bristles and the metal filaments have the same distribution density, and the distribution positions of the bristles and the metal filaments are staggered at the opening position of the liquid outlet.

[0012] Furthermore, the bristles and metal filaments are distributed on the integrated brush tube in one of the following ways: full-surface distribution, segmented distribution, or spiral distribution on the surface of the integrated brush tube.

[0013] Furthermore, the brush tube is a segmented brush tube, and adjacent segmented brush tubes are airtightly connected by a first flexible tube. The electrical conduit is a segmented electrical conduit, and the segmented electrical conduits are connected by a second flexible tube corresponding to the first flexible tube. The segmented electrical conduits and the segmented brush tubes are at the same segment position and the segment distance is equal.

[0014] A second aspect of this application provides a cleaning method including the aforementioned automatic cleaning device for PVC material conveying pipes, comprising:

[0015] S102: Connect the device head to the power supply. Starting from the first end, the first end of the device head enters the pipe first. The temperature sensor on the device head detects the temperature inside the pipe in real time.

[0016] S104: When the power is turned on, the direction of current flow causes the first temperature end to absorb heat and cool down, while the second temperature end releases heat and heats up. The equipment head slides inside the pipe to cool down.

[0017] S106: Compare the solidification temperature of the material with the temperature transmitted by the temperature sensor. When the temperature transmitted by the temperature sensor is the same as the solidification temperature of the material, continue to supply power to allow the material in the pipeline to solidify. After the material solidifies, remove the equipment head from the inside of the pipeline.

[0018] S108: Connect the first end of the equipment head to the mounting base, adjust the support rod to the position of the limit block so that the material removal component can contact the inner wall of the pipe, the equipment head and brush tube enter the pipe to remove materials, the brush bristles brush off the materials, the auxiliary material removal device assists in removing larger materials, and after the materials are removed, the equipment head and brush tube are withdrawn from the inside of the pipe.

[0019] Beneficial effects:

[0020] As can be seen from the above technical solutions, this invention provides an automatic cleaning device and method for PVC material conveying pipes. By using a thermoelectric semiconductor, when energized, the first temperature end of the thermoelectric semiconductor absorbs heat and cools down, rapidly reducing the temperature inside the pipe and causing residual material to solidify quickly. The solidified material is then directly removed using brushes. Furthermore, a temperature sensor transmits the temperature inside the pipe, and the solidification status of the material is determined based on its physical properties, making material removal cleaner, faster, and more scientific. Additionally, because a thermoelectric semiconductor is used, changing the direction of current flow causes the first temperature end of the thermoelectric semiconductor to release heat and rise in temperature. This preheats the pipe in a low-temperature environment, preventing waste caused by solidification of low-temperature material upon entering the pipe during actual material transport, thus reducing material transport costs and improving transport efficiency.

[0021] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered part of the inventive subject matter of this disclosure, provided that such concepts do not contradict each other.

[0022] The foregoing and other aspects, embodiments, and features of the teachings of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0023] The accompanying drawings are not drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the device head structure in an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the automatic cleaning device for PVC material conveying pipes without electrical conduits, as described in this application embodiment.

[0026] Figure 3 This is a schematic diagram of the automatic cleaning device for a PVC material conveying pipe with an electrical conduit, as described in the embodiments of this application.

[0027] Figure 4 This is a schematic diagram of the integrated brush tube in an embodiment of this application.

[0028] Figure 5 for Figure 4Enlarged view of point A in the middle.

[0029] Figure 6 This is a schematic diagram of the first structure of the segmented brush tube in the embodiments of this application.

[0030] Figure 7 This is a schematic diagram of the second structure of the segmented brush tube in the embodiments of this application.

[0031] Figure 8 This is a flowchart illustrating the cleaning method of the automatic cleaning device for PVC material conveying pipes in the embodiments of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] Equipment head 1; First end 101; Temperature sensor 102; Universal wheel 103; First temperature end 104; Insulation layer 105; Second temperature end 106; Second end 107; Material removal component 1071; Support rod 1072; Limiting block 1073; Mounting base 2; Brush tube 3; Liquid inlet pipe 301; Liquid outlet 302; Gravity valve 303; Electrical conduit 4; Brush bristles 5; Metal brush filaments 6; First flexible tube 7; Second flexible tube 8. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this invention pertains.

[0035] The terms "first," "second," and similar words used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] This invention provides an automatic cleaning device and method for PVC material conveying pipes, which solves the technical problem in the prior art where the materials conveyed by PVC material conveying pipes are high-temperature materials, and the materials remaining inside the pipes are mostly viscous. If a cutting block is used to remove them directly, the cutting block is easy to stick to the material, making it difficult to remove the material, which in turn causes material retention and blockage, leading to safety accidents.

[0037] In view of this, the present invention conceives of an automatic cleaning device for PVC material conveying pipes, including a device head 1, a mounting base 2, and a brush tube 3. The device head 1 is threaded to one end of the mounting base 2, and the brush tube 3 is connected to the other end of the mounting base 2. The device head 1 includes a connecting rod, and brush bristles 5 are fixed on the surface of the brush tube 3. The two ends of the connecting rod are defined as a first end 101 and a second end 107, respectively. Threads are provided on the first end 101 and the second end 107. A thermoelectric semiconductor is fixed between the first end 101 and the second end 107. The first temperature end 104 and the second temperature end 106 of the thermoelectric semiconductor are sleeved on the connecting rod. A heat insulation layer 105 is sandwiched between the first temperature end 104 and the second temperature end 106. A caster wheel 103 is installed on the circumferential surface of the first temperature end 104. A temperature sensor 102 is installed on the side of the thermoelectric semiconductor facing the first end 101, and an auxiliary material removal device is installed on the connecting rod on the side of the thermoelectric semiconductor facing the second end 107.

[0038] Reference Figures 1-2 A thermoelectric semiconductor is used on device head 1. The thermoelectric semiconductor utilizes the Peltier effect in thermoelectric theory, with the first temperature terminal 104 acting as a P-type semiconductor and the second temperature terminal 106 as an N-type semiconductor. Connecting the first temperature terminal 104 and the second temperature terminal 106 in series enables heat transfer. By controlling the direction of current flow, cooling or heating is achieved at the first temperature terminal 104. This is used for noiseless cooling in applications such as precision electronic instruments, satellite remote sensing, and deep-sea submarines. The main advantages of using thermoelectric semiconductors are that they have no moving parts or circulating liquid, long lifespan, small size, flexible shape, high safety, and are noiseless and vibration-free.

[0039] The thermoelectric semiconductor and temperature sensor 102 are electrically connected to the power supply, respectively. Figure 2 In this process, the wires are directly installed inside the brush tube 3, and after passing through the brush tube 3, they are connected to the external power supply to achieve their respective functions.

[0040] Reference Figure 1There is at least one auxiliary material removal device on the equipment head 1. Each auxiliary material removal device includes one material removal component 1071, two support rods 1072, and at least two limiting blocks 1073. The limiting blocks 1073 are fixed on the connecting rod and located between the thermoelectric semiconductor and the second end 107. One support rod 1072 is fixed at both ends of the material removal component 1071. The end of the support rod 1072 near the thermoelectric semiconductor that is not connected to the material removal component 1071 is fixed on the connecting rod. The end of the support rod 1072 near the second end 107 that is not connected to the material removal component 1071 is detachably connected to the limiting block 1073. When the end of the support rod 1072 near the second end 107 that is not connected to the material removal component 1071 is connected to the limiting block 1073 closest to the second end 107, the distance between the material removal component 1071 and the connecting rod is less than the distance between the first temperature end 104 and the connecting rod. When there is more than one auxiliary material removal device on the equipment head 1, each auxiliary material removal device is arranged in parallel on the connecting rod.

[0041] The device head 1 can be used independently. When the device head 1 is removed from the mounting base 2, it can be moved within the pipe by adjusting the pipe angle or by using an external power drive via a motor, allowing it to absorb heat for cooling or heating. The connection position of the support rod 1072 is restricted by the limiting block 1073. When the support rod 1072 is connected to the limiting block 1073 closest to the second end 107, the distance between the material removal component 1071 and the connecting rod is less than the distance between the first temperature end 104 and the connecting rod. In this case, the device head 1 can enter the pipe without being obstructed.

[0042] In the first scenario, since the high-temperature material being transported via the pipeline is liquid or viscous, the device head 1 is connected to a power source. Starting from the first end 101, the first end 101 enters the pipeline. The temperature sensor 102 on the device head 1 detects the initial temperature inside the pipeline. The power is then turned on, and the direction of current flow causes the first temperature end 104 to absorb heat and cool down, while the second temperature end 106 releases heat and heats up. Because a heat insulation layer is sandwiched between the first temperature end 104 and the second temperature end 106, their temperatures are not affected, and the device head 1 cools the material inside the pipeline. The solidification temperature is obtained based on the material's physical properties. The temperature transmitted by the temperature sensor 102 is compared with the material's solidification temperature. When the temperature transmitted by the temperature sensor 102 matches the material's solidification temperature, the power supply continues for a period of time, based on the pipeline length, to allow the material inside the pipeline to solidify. After the device head 1 is withdrawn from the inside of the pipe, the first end 101 of the device head 1 is connected to the mounting base 2. The support rod 1072 is adjusted to be placed in the position of the limit block 1073 so that the material removal component 1071 can contact the inner wall of the pipe. The device head 1 and the brush tube 3 enter the pipe to remove materials. The brush bristles 5 brush off the materials, and the auxiliary material removal device assists in removing larger materials.

[0043] In the second scenario, the pipe temperature is lower than the material temperature. The material will solidify upon entering the pipe, causing it to accumulate on the inner wall and reducing the pipe's output. Therefore, the device head 1 can be inserted into the pipe first, the power turned on, and the current flow causing the first temperature end 104 to dissipate heat and raise the temperature, preheating the pipe. The melting temperature of the material is determined based on its physical properties. The temperature transmitted by temperature sensor 102 is compared with the melting temperature of the material. When the temperature transmitted by temperature sensor 102 matches the solidification temperature of the material, the device head 1 is removed, and material transport resumes. This improves material transport efficiency and prevents waste. Furthermore, during the preheating process, the device head 1 can be connected to a brush tube 3, cleaning the pipe while preheating it, thus improving the purity of the transported material.

[0044] The material removal component 1071 is at least one of a cutting block or a vibrator. When the material removal component 1071 is a cutting block, the cutting direction of the cutting block is the same as the traveling direction of the equipment head 1. When the material removal component 1071 is a vibrator, the vibrator is an energy storage type vibrator.

[0045] Using cutting blocks can quickly remove large pieces of material, facilitating the entry and exit of the equipment head 1. When using a vibrator, compared to cutting blocks, it can better protect the pipeline, prevent pipeline scratches, increase pipeline life, and reduce material conveying costs.

[0046] Reference Figures 3-7Metal bristles 6 are also fixed on the brush tube 3. The length of the metal bristles 6 is less than the length of the bristles 5.

[0047] Reference Figure 3 Metal bristles 6 are arranged on the brush tube 3. The metal bristles 6 can be iron wire. Since the metal bristles 6 are shorter than the bristles 5, the metal bristles 6 can remove harder materials that agglomerate quickly. Combined with the softer bristles 5, through density design, the bristles 5 can smoothly remove material clumps of different sizes under different density arrangements.

[0048] Reference Figure 3 A wire conduit 4 is installed inside the brush tube 3. The end of the brush tube 3 away from the mounting base 2 is connected to the drive rod of the motor. When the motor is working, the drive rod is used to drive the brush tube 3 to rotate.

[0049] The brush tube 3 is designed to be rotatable. The bristles 5 and metal filaments 6 on the brush tube 3 can better and more thoroughly remove material clumps or material particles, thus improving the cleanliness of the pipeline cleaning.

[0050] One end of the electrical conduit 4 is fixed to the mounting base 2 and airtightly connected to the connecting rod. The other end of the electrical conduit 4 extends out of the brush tube 3. A liquid storage chamber is formed between the brush tube 3 and the electrical conduit 4. An inlet pipe 301 is installed at the end of the brush tube 3 away from the mounting base 2. An outlet 302 is opened on the surface of the brush tube 3. A gravity valve 303 is installed on the outlet 302.

[0051] Reference Figure 5 A liquid storage chamber is formed between the brush tube 3 and the electrical conduit 4. Pure water or cleaning solution can be poured into the liquid storage chamber through the inlet pipe 301 to further clean the pipe. A gravity valve 303 is installed on the outlet 302. Under the action of centripetal force and gravity, the pure water or cleaning solution in the liquid storage chamber can enter the pipe in one direction to flush the pipe.

[0052] Reference Figures 3-4 The brush tube 3 is an integral brush tube, with the bristles 5 and metal filaments 6 having the same distribution density and their distribution positions being staggered at the opening position of the liquid outlet 302.

[0053] The bristles 5 and metal bristles 6 are distributed on the integrated brush tube in one of the following ways: full surface distribution, segmented distribution, or spiral distribution.

[0054] When the bristles 5 and metal bristles 6 are distributed across the entire surface of the integrated brush tube, they can remove materials from all directions. When the bristles 5 and metal bristles 6 are distributed in segments on the surface of the integrated brush tube, the manufacturing cost of the brush tube 3 is reduced compared to the full surface distribution. When the bristles 5 and metal bristles 6 are distributed in a spiral pattern on the surface of the integrated brush tube, the manufacturing cost of the brush tube 3 is controlled while ensuring the cleaning effect of the brush tube 3.

[0055] Reference Figures 6-7 The brush tube 3 is a segmented brush tube, and the adjacent segmented brush tubes are connected by a first flexible tube 7 in an airtight manner. The electrical conduit 4 is a segmented electrical conduit 4, and the segmented electrical conduits 4 are connected by a second flexible tube 8 corresponding to the first flexible tube 7. The segmented electrical conduits 4 and the segmented brush tubes are at the same segment position and the same distance from each other.

[0056] The first flexible tube 7 and the second flexible tube 8 can be rubber tubes, used to adapt to pipes with bends. When the first flexible tube 7 and the second flexible tube 8 encounter a bend, they bend and pass smoothly through the bend, thus improving the applicability of an automatic cleaning device for PVC material conveying pipes.

[0057] The bristles 5 and metal filaments 6 are distributed on the segmented brush tube in one of two ways: either they are distributed across the entire surface of each segment of the segmented brush tube, or they are distributed in a spiral pattern.

[0058] Reference Figures 6-7 When the bristles 5 and metal bristles 6 are distributed on the full surface of each segment of the segmented brush tube, materials can be removed from all directions. When the bristles 5 and metal bristles 6 are distributed in a spiral pattern on the surface of each segment of the segmented brush tube, the manufacturing cost of the brush tube 3 is controlled while ensuring the cleaning effect of the brush tube 3.

[0059] Reference Figure 8 This application also provides a cleaning method including an automatic cleaning device for PVC material conveying pipes, the method comprising at least the following steps:

[0060] S102: Connect the device head 1 to the power supply. Starting from the first end 101, the first end 101 of the device head 1 enters the pipe first. The temperature sensor 102 on the device head 1 detects the temperature inside the pipe in real time.

[0061] S104: When the power is turned on, the direction of current flow causes the first temperature end 104 to absorb heat and cool down, while the second temperature end 106 releases heat and heats up. The device head 1 slides inside the pipe to cool down.

[0062] S106: Compare the solidification temperature of the material with the temperature transmitted by the temperature sensor 102. When the temperature transmitted by the temperature sensor 102 is the same as the solidification temperature of the material, continue to supply power to allow the material in the pipeline to solidify. After the material solidifies, remove the equipment head 1 from the inside of the pipeline.

[0063] S108: Connect the first end 101 of the device head 1 to the mounting base 2, adjust the support rod 1072 to the position of the limit block 1073 so that the material removal component 1071 can contact the inner wall of the pipe, the device head 1 and the brush tube 3 enter the pipe to remove materials, the brush bristles 5 brush off the materials, the auxiliary material removal device assists in removing larger materials, and after removing the materials, the device head 1 and the brush tube 3 exit from the inside of the pipe.

[0064] When the liquid storage chamber is set up using the conduit 4, between steps S106 and S108, pure water or cleaning solution is injected into the liquid storage chamber through the inlet pipe 301. In step S108, when the equipment head 1 and the brush tube 3 enter the pipeline for material removal, the brush tube 3 rotates, and the liquid in the liquid storage chamber passes through the outlet 302 under the action of centripetal force and gravity. The gravity valve 303 allows one-way passage, and the liquid enters the pipeline to flush the pipeline and is brushed out by the bristles 5.

[0065] In summary, the automatic cleaning device and method for PVC material conveying pipes provided by this invention achieve the goal of solidifying and removing viscous materials inside the pipes after material transportation. This invention also allows for pipe cooling for descaling when cooling is needed, and heating of the pipes to prevent waste during material transport when preheating is required. The automatic cleaning device and method for PVC material conveying pipes provided by this invention improves pipe cleaning efficiency, safety, and convenience.

[0066] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. An automatic cleaning device for PVC material conveying pipes, comprising a device head, a mounting base, and a brush tube, wherein the device head is threadedly connected to one end of the mounting base, the brush tube is connected to the other end of the mounting base, the device head includes a connecting rod, bristles are fixed on the surface of the brush tube, the two ends of the connecting rod are defined as a first end and a second end, and threads are provided on the first end and the second end, characterized in that... A thermoelectric semiconductor is fixed between the first end and the second end. The first temperature end and the second temperature end of the thermoelectric semiconductor are sleeved on the connecting rod. The first temperature end is sleeved on the second temperature end, and the first temperature end and the second temperature end are connected in series to realize heat transfer. By controlling the direction of current flow, cooling or heating is realized at the first temperature end. A heat insulation layer is sandwiched between the first temperature end and the second temperature end. A caster wheel is installed on the circumferential surface of the first temperature end. A temperature sensor is installed on the side of the thermoelectric semiconductor facing the first end, and an auxiliary material removal device is installed on the connecting rod on the side of the thermoelectric semiconductor facing the second end. The device head has at least one auxiliary material removal device. Each auxiliary material removal device includes one material removal component, two support rods, and at least two limiting blocks. The limiting blocks are fixed to the connecting rod and located between the thermoelectric semiconductor and the second end thread. Each end of the material removal component is fixed with one support rod. The end of the support rod near the thermoelectric semiconductor that is not connected to the material removal component is fixed to the connecting rod. The end of the support rod near the second end that is not connected to the material removal component is detachably connected to the limiting block. When the end of the support rod near the second end that is not connected to the material removal component is connected to the limiting block closest to the second end, the distance between the material removal component and the connecting rod is less than the distance between the first temperature end and the connecting rod.

2. The automatic cleaning device for PVC material conveying pipes according to claim 1, characterized in that, The material removal component is at least one of a cutting block and a vibrator. When the material removal component is a cutting block, the cutting direction of the cutting block is the same as the traveling direction of the equipment head. When the material removal component is a vibrator, the vibrator is a storage vibrator.

3. The automatic cleaning device for PVC material conveying pipes according to claim 1, characterized in that, The brush tube is also fixed with metal brush filaments, the length of which is less than the length of the brush bristles.

4. An automatic cleaning device for PVC material conveying pipes according to claim 3, characterized in that, An electrical conduit is installed inside the brush tube. The end of the brush tube away from the mounting base is connected to the drive rod of the motor. When the motor is working, the drive rod is used to drive the brush tube to rotate.

5. An automatic cleaning device for PVC material conveying pipes according to claim 4, characterized in that, One end of the conduit is fixed to the mounting base and airtightly connected to the connecting rod. The other end of the conduit extends out of the brush tube. A liquid storage chamber is formed between the brush tube and the conduit. An inlet pipe is installed at the end of the brush tube away from the mounting base. An outlet is opened on the surface of the brush tube, and a gravity valve is installed on the outlet.

6. An automatic cleaning device for PVC material conveying pipes according to claim 5, characterized in that, The brush tube is an integral brush tube, and the bristles and the metal filaments have the same distribution density and are staggered in position at the outlet.

7. An automatic cleaning device for PVC material conveying pipes according to claim 6, characterized in that, The bristles and metal filaments are distributed on the integrated brush tube in one of the following ways: full surface distribution, segmented distribution, or spiral distribution.

8. An automatic cleaning device for PVC material conveying pipes according to claim 5, characterized in that, The brush tube is a segmented brush tube, and adjacent segmented brush tubes are airtightly connected by a first flexible tube. The electrical conduit is a segmented electrical conduit, and the segmented electrical conduits are connected by a second flexible tube corresponding to the first flexible tube. The segmented electrical conduits and the segmented brush tubes are at the same segment position and the segment distance is equal.

9. A cleaning method comprising the automatic cleaning device for PVC material conveying pipes as described in claim 1, characterized in that, include: S102: Connect the device head to the power supply. Starting from the first end, the first end of the device head enters the pipe first. The temperature sensor on the device head detects the temperature inside the pipe in real time. S104: When the power is turned on, the direction of current flow causes the first temperature end to absorb heat and cool down, while the second temperature end releases heat and heats up. The equipment head slides inside the pipe to cool down. S106: Compare the solidification temperature of the material with the temperature transmitted by the temperature sensor. When the temperature transmitted by the temperature sensor is the same as the solidification temperature of the material, continue to supply power to allow the material in the pipeline to solidify. After the material solidifies, remove the equipment head from the inside of the pipeline. S108: Connect the first end of the equipment head to the mounting base, adjust the support rod to the position of the limit block so that the material removal component can contact the inner wall of the pipe, the equipment head and brush tube enter the pipe to remove materials, the brush bristles brush off the materials, the auxiliary material removal device assists in removing larger materials, and after the materials are removed, the equipment head and brush tube are withdrawn from the inside of the pipe.

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