Pipe with filtering function

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) pipes, in particular to a pipe with a filtering function, which comprises a pipe body, an inner cavity and a filtering device, the inner cavity is enclosed by the pipe body, the pipe further comprises a mounting part, the filtering device is provided with a filtering piece, the mounting part is fixedly connected with the outer wall of the pipe body, and the filtering device is inserted into the mounting part and fixedly connected with the mounting part. The filtering part penetrates through the inner cavity and divides the inner cavity into a water inlet cavity and a water outlet cavity, the water inlet cavity is communicated with the interior of the filtering device, and water in the water inlet cavity flows into the water outlet cavity through the filtering part after passing through the interior of the filtering device. Water in the water inlet cavity passes through the interior of the filtering device and then flows into the water outlet cavity through the filtering piece, impurities with large granularity in water can be filtered and cleaned for water equipment in the water supply process, other coarse filtering equipment does not need to be arranged, and use convenience is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC pipes, and more particularly to a pipe with a filtering function. Background Art

[0002] PVC pipe, also known as rigid polyvinyl chloride pipe, is formed by hot-pressing polyvinyl chloride resin with stabilizers and lubricants. It was the first plastic pipe to be developed and applied. PVC-U pipe offers strong corrosion resistance, easy bonding, low price, and a strong texture. However, due to the leakage of PVC-U monomer and additives, it is only suitable for water supply systems with a delivery temperature not exceeding 45°C. Plastic pipes are used for drainage, wastewater, chemicals, heating and cooling liquids, food, ultrapure liquids, slurries, gases, compressed air, and vacuum systems. For example, a high-strength, crack-resistant pipe structure disclosed in the prior art includes a pipe body comprising a first polyvinyl chloride layer, a first adhesive layer, a reinforcement layer, a second adhesive layer, a second polyvinyl chloride layer, and an anti-corrosion layer, arranged in sequence. The first polyvinyl chloride layer is disposed innermost, and the anti-corrosion layer is disposed outermost. The first polyvinyl chloride layer is connected to the reinforcement layer via the first adhesive layer, the reinforcement layer is connected to the second polyvinyl chloride layer via the second adhesive layer, and the second polyvinyl chloride layer is connected to the anti-corrosion layer. The utility model provides a high-strength, crack-resistant pipe structure with reasonable structural design. It has high anti-aging ability, low-temperature crack resistance and lubrication performance. It also has strong impact strength, elasticity and corrosion resistance, and is widely used in various water supply systems.

[0003] However, when the above-mentioned crack-resistant pipes of the prior art are used in water supply systems with poor water quality and a lot of impurities, especially when the water source carries sand and gravel, the impurities in the water output from the pipeline will clog the water supply equipment at the next level, and subsequent use requires self-filtration and cleaning, which is relatively inconvenient. Utility Model Content

[0004] The purpose of the utility model is to overcome the inconvenience of the prior art's crack-resistant pipes being required to filter and clean impurities by themselves in the later use when used in a water supply system with poor water quality and a large amount of impurities. A multi-layer pipe with a filtering function is provided, which not only has an anti-cracking function but can also filter and clean impurities in the fluid, thereby improving the convenience of use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A pipe with a filtering function is provided, comprising a pipe body, an inner cavity and a filtering device, wherein the pipe body surrounds the inner cavity and also comprises a mounting portion, the filtering device is provided with a filter element, the mounting portion is fixedly connected to the outer wall of the pipe body, after the filtering device is inserted into the mounting portion and fixedly connected, the filter element passes through the inner cavity and divides the inner cavity into a water inlet cavity and a water outlet cavity, the water inlet cavity is connected to the interior of the filtering device, and the water in the water inlet cavity passes through the interior of the filtering device and then flows into the water outlet cavity through the filter element.

[0007] During the working process of the above scheme, first, the two ends of the pipe body are installed between the water source and the water-using equipment, and then the filter device is inserted into the installation part and fixed, so that the filter element passes through the inner cavity and cuts off the inner cavity into the water inlet cavity and the water outlet cavity, and then the water source is turned on. When water flows from the water inlet cavity to the filter device, the impurities in the water remain in the filter device under the filtering action of the filter element, and the filtered water flows from the filter element to the water outlet cavity, completing the pre-filtration of the water body. After a period of use, when the filter device needs to be cleaned, the filter device is removed from the installation part to clean the accumulated impurities. During the water supply process, it can filter and clean impurities with larger particle size in the water for the water-using equipment, without the need to set up other coarse filtering equipment, effectively improving the convenience of use.

[0008] Furthermore, a fixing portion is provided on the wall surface of the inner cavity away from the mounting portion, and the fixing portion is used to fix and install the filter element; after the filter device is inserted into the mounting portion, the filter element needs to completely divide the inner cavity into an inlet chamber and an outlet chamber, and the filter element cannot become loose during the filtration process, resulting in filtration failure. Therefore, a fixing portion is provided to stably fix the filter element.

[0009] 14. The filter element as claimed in claim 13, wherein the filter element has a top portion and a bottom portion, and the top portion of the filter element is fixedly connected to the filter element, wherein the filter element has a cylindrical shape and a narrow band. The filter element has a cylindrical shape and a bottom portion, and a cylindrical filter element is connected to the filter element by the spring. The cylindrical filter element is connected to the filter element by the spring. The cylindrical filter element is connected to the filter element by the spring.

[0010] Furthermore, the end face of one end of the filter element that is clamped with the fixed part is elliptical, and the end face of the filter element is in contact with the end face of the water inlet chamber; the filter element is a cylindrical filter mesh, and the specific form of the end face is a cross-section formed by obliquely cutting the filter element in a direction that forms an angle with the axial direction of the cylinder, and the end face must be in contact with the end face of the water inlet chamber to have better filtering performance.

[0011] Furthermore, the filtering device also includes a collecting pipe and a collecting box, one end of the collecting pipe is fixedly connected to the filter element, and the other end is fixedly connected to the collecting box; water in the water inlet chamber carries impurities into the filtering device, and the collecting box is used to store the filtered impurities, and the collecting box should be appropriately large to improve the impurity collection effect, but not too large, because water will first enter the collecting box due to gravity and will not enter the water outlet chamber until it overflows out of the mounting part. If the volume of the collecting box is too large, more water will accumulate in the collecting box, causing the water delivery to slow down.

[0012] Furthermore, the collection box is provided with an observation port, which is used to observe the amount of impurities accumulated in the collection box; the setting of the observation port is conducive to judging the amount of impurities accumulated in the collection box so as to facilitate timely cleaning to avoid clogging of the filter element.

[0013] Furthermore, a threaded portion is provided at one end of the collecting pipe away from the collecting box, and the threaded portion is threadedly connected to the mounting portion; the collecting pipe is provided with a threaded portion, and the entire filtering device is threadedly connected to the mounting portion, which is convenient for disassembly and installation.

[0014] Furthermore, it also includes a first sealing ring and a second sealing ring, which are respectively installed at the two ends of the threaded part; the first sealing ring and the second sealing ring are made of rubber material, and the first sealing ring and the second sealing ring are provided to prevent water leakage at the connection between the installation part and the filtering device.

[0015] Furthermore, the pipe body also includes a reinforcing layer, a shock-absorbing layer and a flame-retardant layer. The reinforcing layer surrounds the inner cavity, the inner side of the shock-absorbing layer is fixedly connected to the reinforcing layer, and the outer side of the shock-absorbing layer is fixedly connected to the flame-retardant layer. The reinforcing layer is compounded with a PVC matrix by a winding process of glass fiber, which can significantly improve the compressive and tensile strength of the PVC pipe, so that it can withstand higher pressure and is not easy to break when impacted by external forces, thereby improving the safety of the pipeline. The shock-absorbing layer is made of foam material, which can effectively absorb and disperse impact energy and reduce deformation and damage of the pipeline. The foam shock-absorbing pad is made of materials such as polyurethane or polyethylene, and has the characteristics of light weight, heat insulation and shock absorption.

[0016] Furthermore, it also includes a wear-resistant layer and an anti-corrosion layer, the inner side of the wear-resistant layer is fixedly connected to the flame-retardant layer, and the outer side of the wear-resistant layer is fixedly connected to the anti-corrosion layer; the wear-resistant layer is made of pure PVC material, and is treated with special anti-aging and fastening technology, and has extremely high wear resistance and pressure resistance. It can not only effectively prevent the pipeline from being damaged by friction during use, but also extend the service life of the pipeline. The anti-corrosion layer is composed of a multi-layer structure, the outermost layer is paint, the middle layer is polyvinyl chloride, and the bottom layer is adhesive. This structure ensures that the layers are tightly bonded to form a composite structure, which improves the overall anti-corrosion performance, and reduces the occurrence of corrosion by preventing corrosive substances from directly contacting the pipeline, thereby protecting the integrity and safety of the pipeline.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. A filter element is provided in the filter device, and the mounting portion is fixedly connected to the outer wall of the tube body. After the filter device is inserted into the mounting portion and fixedly connected, the filter element passes through the inner cavity and divides the inner cavity into a water inlet cavity and a water outlet cavity. The water inlet cavity is communicated with the interior of the filter device. The water in the water inlet cavity passes through the interior of the filter device and then flows into the water outlet cavity through the filter element. During the water supply process, it can filter and clean impurities with larger particles in the water for the water-using equipment, without the need to set up other coarse filtering equipment, thereby effectively improving the convenience of use.

[0019] 2. The pipe body adopts a multi-layer setting, including a reinforcement layer, a shock-absorbing layer, a flame retardant layer, a wear-resistant layer and an anti-corrosion layer, which can effectively improve the integrity and safety of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a pipe with a filtering function;

[0021] Figure 2 This is a schematic diagram of the internal structure of a pipe with filtering function;

[0022] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0023] Figure 4 A schematic structural diagram of a filtering device for a pipe having a filtering function;

[0024] Figure 5 The figure is a schematic diagram of the cross-sectional structure of a pipe body with filtering function.

[0025] In the accompanying drawings: 1. Tube body; 110. Reinforcement layer; 120. Shock-absorbing layer; 130. Flame-retardant layer; 140. Wear-resistant layer; 150. Anti-corrosion layer; 2. Inner cavity; 210. Water inlet cavity; 220. Water outlet cavity; 3. Mounting portion; 4. Filter device; 410. Filter element; 420. Collecting pipe; 421. Threaded portion; 430. Collecting box; 431. Observation port; 440. Fixing portion; 441. Guide slope; 442. Fixing slope; 443. Card slot; 5. First sealing ring; 6. Second sealing ring. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Example 1

[0029] This embodiment is the first embodiment of a pipe with filtering function. Figures 1 to 3 As shown, it includes a tube body 1, an inner cavity 2 and a filter device 4. The tube body 1 surrounds the inner cavity 2 and also includes a mounting portion 3. The filter device 4 is provided with a filter element 410. The mounting portion 3 is fixedly connected to the outer wall of the tube body 1. After the filter device 4 is inserted into the mounting portion 3 and fixedly connected, the filter element 410 passes through the inner cavity 2 and divides the inner cavity 2 into a water inlet cavity 210 and a water outlet cavity 220. The water inlet cavity 210 is connected to the inside of the filter device 4. The water in the water inlet cavity 210 passes through the inside of the filter device 4 and flows into the water outlet cavity 220 through the filter element 410.

[0030] Specifically, a fixing portion 440 is provided on the wall surface of the inner cavity 2 away from the mounting portion 3, and the fixing portion 440 is used to fix the filter element 410; after the filter device 4 is inserted into the mounting portion 3, the filter element 410 needs to completely divide the inner cavity 2 into the water inlet chamber 210 and the water outlet chamber 220. The filter element 410 cannot become loose during the filtration process, resulting in filtration failure. Therefore, the fixing portion 440 is provided to stably fix the filter element 410.

[0031] Specifically, one side of the fixing portion 440 is a guide slope 441, and the other side is a fixed slope 442 fixedly connected to the guide slope 441. The guide slope 441 is located on the side of the water inlet chamber 210, and the fixed slope 442 is located on the side of the water outlet chamber 220. A card slot 443 is provided on the top of the fixed slope 442. The filter element 410 is a cylindrical filter screen. A portion of the top of the filter element 410 extends out of the mounting portion 3 and is engaged with the card slot 443, and the other portion is located in the mounting portion 3. The shape of the guide slope 441 can be an arc slope or a straight wall slope. The diversion slope 441 is set to facilitate the diversion of water from the water inlet chamber 210 to the interior of the filter device 4. It is fixedly connected by a snap-fit ​​method, which facilitates removal while ensuring stability. The filter element 410 is cylindrical, but since the water inlet chamber 210 needs to be connected to the interior of the filter device 4 to allow impurities to enter the filter device 4, only one side of the filter element 410 can extend out of the mounting portion 3 and be fixedly connected to the wall of the water inlet chamber 210, and the other end needs to be retained in the mounting portion 3, otherwise impurities will be blocked on the side of the filter element 410 close to the water inlet chamber 210.

[0032] Specifically, the end face of one end of the filter element 410 that is clamped with the fixing portion 440 is elliptical, and the end face of the filter element 410 is in contact with the end face of the water inlet chamber 210; the filter element 410 is a cylindrical filter mesh, and the specific form of the end face is a cylinder with an elliptical cross-section formed by obliquely cutting relative to the axial direction of the cylinder, and this end face must be in contact with the end face of the water inlet chamber 210 to have better filtering performance.

[0033] The working principle of the pipe with filtering function in this embodiment is as follows:

[0034] After installing both ends of the pipe body 1 between the water source and the water-using equipment, the filter device 4 is inserted into the mounting portion 3 and tightened, so that the filter element 410 passes through the inner cavity 2 and cuts off the inner cavity 2 into the water inlet cavity 210 and the water outlet cavity 220, and the end face of the filter element 410 is in contact with the end face of the water inlet cavity 210. Then, turn on the water source. When water flows from the water inlet cavity 210 to the filter device 4, a part of the water directly passes through the filter element 410 and enters the water outlet cavity 220 due to the action of water pressure, while impurities will be blocked by the filter element 410 on the side of the filter element 410 close to the water inlet cavity 210 and sink into the filter device 4 under the action of gravity. The other part of the water will pour into the filter device 4 and the impurities will also flow into the filter device 4 with the water flow. After the water surface overflows the mounting portion 3, the subsequent water will directly pass through the filter element 410 and enter the water outlet cavity 220, and continuously filter out impurities. The impurities are finally deposited in the filter device 4 under the action of gravity.

[0035] The beneficial effects of this embodiment are as follows: the water in the water inlet chamber 210 passes through the interior of the filter device 4 and then flows into the water outlet chamber 220 through the filter element 410. During the water supply process, it can filter and clean impurities with larger particle sizes in the water for the water-using equipment, without the need to set up other coarse filtering equipment, thereby effectively improving the convenience of use.

[0036] Example 2

[0037] This embodiment is a second embodiment of a pipe with filtering function, such as Figures 1 to 4 As shown, the difference from Example 1 is that:

[0038] Specifically, the filter device 4 also includes a collecting pipe 420 and a collecting box 430. One end of the collecting pipe 420 is fixedly connected to the filter element 410, and the other end is fixedly connected to the collecting box 430. The water in the water inlet chamber 210 carries impurities into the filter device 4, and the collecting box 430 is used to store the filtered impurities. The collecting box 430 should be appropriately large to improve the collection effect of impurities, but not too large, because water will first enter the collecting box 430 due to gravity and will not enter the water outlet chamber 220 until it overflows the mounting part 3. If the volume of the collecting box 430 is too large, more water will accumulate in the collecting box 430, causing the water transportation to slow down.

[0039] Specifically, the collection box 430 is provided with an observation port 431 for observing the amount of impurities accumulated in the collection box 430 ; the setting of the observation port 431 is conducive to judging the amount of impurities accumulated in the collection box 430 so as to facilitate timely cleaning to avoid clogging the filter element 410 .

[0040] Specifically, a threaded portion 421 is provided at one end of the collecting tube 420 away from the collecting box 430, and the threaded portion 421 is threadedly connected to the mounting portion 3; the collecting tube 420 is provided with a threaded portion 421, and the entire filtering device 4 is threadedly connected to the mounting portion 3, which is convenient for disassembly and installation.

[0041] Specifically, it also includes a first sealing ring 5 and a second sealing ring 6, which are respectively installed at the two ends of the threaded portion 421; the first sealing ring 5 and the second sealing ring 6 are made of rubber, and the first sealing ring 5 and the second sealing ring 6 are provided to prevent water leakage at the connection between the mounting portion 3 and the filtering device 4.

[0042] The working principle of the pipe with filtering function in this embodiment is as follows:

[0043] During the filtration process, impurities in the filter element 410 are deposited into the collection box 430 under the action of gravity. After the filter device 4 has been used for a period of time, observe the observation port 431 on the collection box 430. If too much impurities are found to have accumulated, turn off the water source, remove the entire filter device 4 by loosening the threads, and clean the impurities in the collection box 430.

[0044] Beneficial effects of this embodiment: a collection pipe 420 and a collection box 430 are provided in the filter device 4, and an observation port 431 is provided on the collection box 430, which is convenient for the user to judge whether there are too many impurities and to disassemble and clean the impurities.

[0045] Example 3

[0046] This embodiment is a third embodiment of a pipe with filtering function, such as Figure 2 and 5 As shown, the difference from Example 1 is that:

[0047] Specifically, the pipe body 1 also includes a reinforcing layer 110, a shock-absorbing layer 120 and a flame-retardant layer 130. The reinforcing layer 110 forms an inner cavity 2. The inner side of the shock-absorbing layer 120 is fixedly connected to the reinforcing layer 110, and the outer side of the shock-absorbing layer 120 is fixedly connected to the flame-retardant layer 130. The reinforcing layer 110 is compounded with a PVC matrix by a winding process of glass fiber, which can significantly improve the compressive and tensile strength of the PVC pipe, so that it can withstand higher pressure and is not easy to break when subjected to external force impact, thereby improving the safety of the pipeline. The shock-absorbing layer 120 is made of foam material, which can effectively absorb and disperse impact energy and reduce deformation and damage of the pipeline. The foam shock-absorbing pad is made of materials such as polyurethane or polyethylene, and has the characteristics of light weight, heat insulation and shock absorption. The flame-retardant layer 130 is achieved by adding flame retardant to the PVC material. The flame retardant is an additive that can reduce the flammability of the material, slow down the combustion rate and promote self-extinguishing.

[0048] Specifically, it also includes a wear-resistant layer 140 and an anti-corrosion layer 150. The inner side of the wear-resistant layer 140 is fixedly connected to the flame-retardant layer 130, and the outer side of the wear-resistant layer 140 is fixedly connected to the anti-corrosion layer 150. The wear-resistant layer 140 is made of pure PVC material and has been treated with special aging resistance and fastening technology. It has extremely high wear resistance and pressure resistance. It can not only effectively prevent the pipeline from being damaged by friction during use, but also extend the service life of the pipeline. The anti-corrosion layer is composed of a multi-layer structure. The outermost layer is paint, the middle layer is polyvinyl chloride, and the bottom layer is adhesive. This structure ensures that the layers are tightly bonded to form a composite structure, which improves the overall anti-corrosion performance, and reduces the occurrence of corrosion by preventing corrosive substances from directly contacting the pipeline, thereby protecting the integrity and safety of the pipeline.

[0049] The working principle of the pipe with filtering function in this embodiment is as follows: when the pipe is subjected to external destructive factors, the reinforcement layer 110 can effectively resist deformation, the shock-absorbing layer 120 can effectively absorb and disperse impact energy, the flame-retardant layer 130 can slow down the combustion rate, the wear-resistant layer 140 can effectively prevent the pipeline from being damaged by friction during use, and the anti-corrosion layer 150 can prevent corrosive substances from directly contacting the pipeline, thereby reducing the occurrence of corrosion.

[0050] The beneficial effects of this embodiment are as follows: the pipe body 1 adopts a multi-layer configuration, including a reinforcement layer 110, a shock-absorbing layer 120, a flame-retardant layer 130, a wear-resistant layer 140, and an anti-corrosion layer 150, which can effectively improve the integrity and safety of the pipeline. In the specific content of the above specific embodiment, the various technical features can be combined in any non-contradictory manner. For the sake of simplicity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features does not conflict, it should be considered as within the scope of this specification.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pipe with a filtering function, comprising a pipe body (1) and an inner cavity (2), wherein the pipe body (1) encloses the inner cavity (2), and is characterized in that: The invention also includes a mounting portion (3) and a filter device (4), wherein the filter device (4) is provided with a filter element (410), and the mounting portion (3) is fixedly connected to the outer wall of the tube body (1). After the filter device (4) is inserted into the mounting portion (3) and fixedly connected, the filter element (410) passes through the inner cavity (2) and divides the inner cavity (2) into a water inlet cavity (210) and a water outlet cavity (220). The water in the water inlet cavity (210) is communicated with the interior of the filter device (4), and water in the water inlet cavity (210) passes through the interior of the filter device (4) and then flows into the water outlet cavity (220) through the filter element (410).

2. The pipe with filtering function according to claim 1, characterized in that: A fixing portion (440) is provided on a wall surface of the inner cavity (2) away from the mounting portion (3), and the fixing portion (440) is used for fixing and mounting the filter element (410).

3. The pipe with filtering function according to claim 2, characterized in that: One side of the fixing portion (440) is a flow guiding slope (441), and the other side is a fixed slope (442) fixedly connected to the flow guiding slope (441). The flow guiding slope (441) is located on one side of the water inlet chamber (210), and the fixed slope (442) is located on one side of the water outlet chamber (220). A clamping groove (443) is provided on the top of the fixed slope (442). The filter element (410) is a cylindrical filter screen. A portion of the top of the filter element (410) extends out of the mounting portion (3) and is engaged with the clamping groove (443), and the other portion is located inside the mounting portion (3).

4. The pipe with filtering function according to claim 3, characterized in that: The end surface of one end of the filter element (410) that is engaged with the fixing portion (440) is elliptical, and the end surface of the filter element (410) is in contact with the end surface of the water inlet cavity (210).

5. The pipe with filtering function according to claim 1, characterized in that: The filtering device (4) further comprises a collecting pipe (420) and a collecting box (430); one end of the collecting pipe (420) is fixedly connected to the filtering element (410), and the other end is fixedly connected to the collecting box (430).

6. The pipe with filtering function according to claim 5, characterized in that: The collection box (430) is provided with an observation port (431), and the observation port (431) is used to observe the amount of impurities accumulated in the collection box (430).

7. The pipe with filtering function according to claim 5, characterized in that: A threaded portion (421) is provided at one end of the collecting pipe (420) away from the collecting box (430), and the threaded portion (421) is threadedly connected to the mounting portion (3).

8. The pipe with filtering function according to claim 7, characterized in that: It also includes a first sealing ring (5) and a second sealing ring (6), wherein the first sealing ring (5) and the second sealing ring (6) are respectively installed at two ends of the threaded portion (421).

9. A pipe with filtering function according to any one of claims 1 to 8, characterized in that: The tube body (1) further comprises a reinforcing layer (110), a shock-absorbing layer (120) and a flame-retardant layer (130); the reinforcing layer (110) encloses the inner cavity (2); the inner side of the shock-absorbing layer (120) is fixedly connected to the reinforcing layer (110); and the outer side of the shock-absorbing layer (120) is fixedly connected to the flame-retardant layer (130).

10. The pipe with filtering function according to claim 9, characterized in that: It also includes a wear-resistant layer (140) and an anti-corrosion layer (150), wherein the inner side of the wear-resistant layer (140) is fixedly connected to the flame-retardant layer (130), and the outer side of the wear-resistant layer (140) is fixedly connected to the anti-corrosion layer (150).

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