A multi-layered steel frame and its pipeline

Abstract

This invention discloses a multi-layered steel frame and its pipe, relating to the field of steel frame pipe technology. It includes internal supporting warp threads, with external spiral weft threads welded to the outside of the internal supporting warp threads. The internal supporting warp threads consist of multiple independent warp threads arranged circumferentially, with the diameter and density of the warp threads selected and matched according to strength requirements. Several external spiral weft threads are provided. This invention utilizes the unique triangular arrangement structure of the external spiral weft threads to improve the stress condition of the steel frame composite plastic pipe during use, effectively suppressing radial deformation of the pipe wall. Simultaneously, the internal supporting warp threads provide axial rigid support. The combined effect significantly improves the overall pressure-bearing capacity and impact resistance of the pipe, effectively preventing pipe cracking during use, and thus effectively improving the overall service life of the steel frame composite plastic pipe.

Description

Technical Field

[0001] This invention relates to the field of steel frame pipe technology, specifically to a multi-layered steel frame and its pipe. Background Technology

[0002] Steel-reinforced plastic composite pipe is a new type of double-sided anti-corrosion pressure pipe made of two materials: metal and plastic. It usually uses a high-strength steel skeleton as the core reinforcement, with steel wires spirally wound to form a mesh skeleton that is three-dimensionally interwoven and formed in one piece. However, the use of steel-reinforced plastic composite pipes is currently limited by their internal skeleton structure. As the diameter increases, the traditional single-layer warp and weft threads can no longer guarantee the pipe performance. The DN600 diameter pipe shows obvious ellipticity and low ring stiffness, which can no longer meet the requirements for storage, delivery and installation, thus reducing the safety of steel-reinforced plastic composite pipes. Summary of the Invention

[0003] This invention provides a multi-layered steel frame and its conduit, which can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-layered steel frame including internal supporting warp threads, wherein an external spiral weft thread is spirally welded to the outside of the internal supporting warp threads, the internal supporting warp threads are composed of multiple independent warp threads arranged along the circumferential direction, and the diameter and arrangement density of the warp threads are selected and matched according to the strength requirements, and several external spiral weft threads are provided.

[0005] Preferably, a steel wire mesh belt is spirally welded to the outside of the internal supporting warp using a welding device, and the steel wire mesh belt is simultaneously welded to the internal supporting warp and the external spiral weft using a welding machine.

[0006] Preferably, there are no fewer than three outer spiral weft threads arranged in a double layer, wherein the inner layer has two outer spiral weft threads arranged side by side, and the outer layer has a single outer spiral weft thread. The three outer spiral weft threads are welded together by high voltage and low current, so that the three outer spiral weft threads form a three-strand triangular structure.

[0007] Preferably, there are no fewer than five outer spiral weft threads arranged in a double layer, wherein the inner layer has three outer spiral weft threads arranged in parallel, and the outer layer has two outer spiral weft threads arranged in parallel. The five outer spiral weft threads are welded together by high voltage and low current, so that the five outer spiral weft threads form a five-strand trapezoidal structure.

[0008] Preferably, there are no fewer than six external spiral weft threads arranged in three layers, with three external spiral weft threads arranged side by side in the inner layer, two external spiral weft threads arranged side by side in the middle layer, and a single external spiral weft thread arranged in the outer layer. The six external spiral weft threads are welded together by high voltage and low current to form a six-strand tower-shaped structure.

[0009] Preferably, a multi-layered steel skeleton pipe, a pipe made of a multi-layered steel skeleton, wherein the inner supporting warp and the outer spiral weft are covered with a composite plastic pipe body by an extrusion device; An external adhesive multi-angle detection and protection mechanism is provided on the outer side of the composite plastic pipe body; The external adhesive multi-angle detection and protection mechanism includes a connecting film; The outer side of the composite plastic pipe body is evenly and equidistantly bonded with connecting adhesive sheets along the circumferential direction. An installation connection box is bonded to the outer side of the connecting adhesive sheets. The installation connection box is filled with an internal connecting block. An elastic connecting piece is bonded to the bottom between two installation connection boxes. Each of the two adjacent internal connecting blocks has a connecting cylinder embedded in it with adhesive. Each of the two connecting cylinders has a locking screw fixedly connected to one end of the elastic connecting piece at two corners. Each of the other two connecting cylinders has a splicing threaded cylinder rotatably installed at the other end of the elastic connecting piece at two corners. An installation sleeve is embedded in the middle of one end of one of the internal connecting blocks, and an installation inner slide rod is embedded in the middle of one end of the other internal connecting block. A rubber rectangular mounting block is fixedly sleeved on the outside of the mounting sleeve. A pressure sensor is embedded in the center of the top of the rubber rectangular mounting block. A sealing protective film is adhered to the outside of the mounting connection box.

[0010] Preferably, the two axially adjacent mounting boxes are aligned with each other; The locking screw and the splicing threaded cylinder correspond to each other, and the locking screw and the splicing threaded cylinder are connected to each other by threads.

[0011] Preferably, the pressure sensor is connected to an external receiving device via a data cable, and a rectangular slot is provided at the center of the top surface of the sealing protective film corresponding to the outer position of the rubber rectangular mounting block.

[0012] Preferably, the composite plastic pipe body has symmetrical splicing rings snapped into the middle of its outer side. The inner side of the splicing rings has arc-shaped installation grooves evenly spaced along the circumferential direction. The arc-shaped installation grooves are glued to the inside of the arc-shaped installation grooves. A tension sensor is embedded in the middle of one end of the connecting arc-shaped adhesive block. A traction cable is fixedly connected between two adjacent tension sensors.

[0013] Preferably, the splicing ring is spliced ​​by protrusions and grooves, and the splicing ring is connected by adhesive, and the inner arc surface of the splicing ring is tightly fitted with the outer surface of the composite plastic pipe body; The outer arc surface of the connecting arc-shaped rubber block is tightly slidably fitted with the inner wall of the arc-shaped mounting groove, and the tension sensor is connected to an external receiving device via a data cable.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use. 1. The composite plastic pipe body protects the internal supporting warp lines and the outer spiral weft lines, preventing the internal steel skeleton from corroding and aging rapidly during use. Simultaneously, the unique triangular arrangement of the outer spiral weft lines improves the stress distribution during use. When pipe pressure increases, the outer spiral weft lines evenly distribute stress through the triangular structure, transferring the pressure originally released radially into axial stress, effectively suppressing radial deformation of the pipe wall. Meanwhile, the internal supporting warp lines provide axial rigid support. Together, these two elements significantly enhance the overall pressure-bearing capacity and impact resistance of the pipe, effectively preventing pipe bursting during use and thus extending the overall service life of the steel-reinforced composite plastic pipe.

[0015] 2. An external adhesive multi-angle detection and protection mechanism is installed. Through the cooperation of the various components within this mechanism, the detection process during the installation and use of steel-reinforced composite plastic pipes is optimized. Pressure and tension sensors on the outer side of the composite plastic pipe body monitor the external condition of the pipe in real time. This ensures that changes in the surrounding soil layer can be detected promptly, and that changes in the pipe's own shape can be addressed in a timely manner. This effectively expands the functionality of the steel-reinforced composite plastic pipe, enabling simultaneous detection of its internal and external conditions. When installed in areas with unstable soil, this allows for both normal operation of the steel-reinforced composite plastic pipe and monitoring of the surrounding soil environment, thus significantly improving the ease of maintenance. Meanwhile, the splicing structure design of the internal connecting blocks and splicing rings allows for the selection and installation of various external components of the steel-reinforced composite plastic pipe as needed after the main body is assembled, further improving the convenience of installation and use. Additionally, the locking screw and splicing threaded cylinder can be adjusted to correct slight bends in the pipe, and the installation sleeve and inner sliding rod reinforce the exterior of the steel-reinforced composite plastic pipe, improving its overall bending strength and structural strength.

[0016] In summary, by comprehensively optimizing the internal and external structures of the steel-reinforced composite plastic pipe, the internal structural strength of the pipe is improved. External reinforcement is achieved through the internal connecting blocks and splicing rings on the outer side of the composite plastic pipe body, further enhancing the overall bending resistance of the steel-reinforced composite plastic pipe. Furthermore, pressure and tension sensors on the outer side of the pipe are used to monitor its operational status in real time, effectively expanding the pipe's functionality and improving its level of intelligence. The flow rate of steel-reinforced polyethylene composite pipe (DN800) is comparable to that of pure PE pipe (DN1000). Although pure PE pipe provides strength solely through wall thickness, its pressure and corrosion resistance depend entirely on the plastic's resistance. In contrast, steel-reinforced pipe combines the high rigidity of steel with the excellent corrosion resistance of PE, using less plastic and exhibiting stronger overall performance. This is similar to the classic reinforced concrete structure in construction, possessing both the rigidity of steel and the corrosion resistance advantages of non-metallic materials. Furthermore, the inner wall of steel-reinforced polyethylene composite pipe is very smooth, resulting in lower hydraulic resistance. Under the same operating conditions, it can significantly reduce friction loss and contribute to energy conservation, greatly reducing resistance in fluid transport, improving energy efficiency, saving electricity costs, and achieving a more energy-efficient and environmentally friendly overall effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the three-strand triangular structure of the present invention; Figure 3 This is a cross-sectional view of the three-strand triangular structure of the present invention; Figure 4 This is a schematic diagram of the five-strand trapezoidal structure of the present invention; Figure 5 This is a schematic diagram of the end face structure of the five-strand trapezoidal structure of the present invention; Figure 6 This is a cross-sectional view of the five-strand trapezoidal structure of the present invention; Figure 7 This is a schematic diagram of the six-strand tower-shaped structure of the present invention; Figure 8 This is a schematic diagram of the end face structure of the six-strand tower-shaped structure of the present invention; Figure 9 This is a cross-sectional view of the six-strand tower structure of the present invention; Figure 10 This is a schematic diagram of the external structure of the composite plastic pipe body of the present invention; Figure 11 This is a schematic diagram of the external adhesive multi-angle detection and protection mechanism of the present invention; Figure 12 This is a schematic diagram of the internal connecting block installation structure of the present invention; Figure 13 This is a schematic diagram of the splicing retainer installation structure of the present invention; The diagram labels are: 1. Internal supporting warp; 2. External spiral weft; 3. Composite plastic pipe body. 4. External adhesive multi-angle detection and protection mechanism; 401. Connecting film; 402. Mounting connection box; 403. Internal connecting block; 404. Elastic connecting piece; 405. Connecting cylinder; 406. Locking screw; 407. Splicing threaded cylinder; 408. Mounting sleeve; 409. Mounting inner slide rod; 410. Rubber rectangular mounting block; 411. Pressure sensor; 412. Sealing protective film; 413. Splicing retaining ring; 414. Arc-shaped mounting groove; 415. Connecting arc-shaped rubber block; 416. Tension sensor; 417. Traction cable. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example 1: like Figure 1 As shown, the present invention provides a technical solution: a multi-layered steel frame with weft threads, including an internal supporting warp thread 1, an external spiral weft thread 2 welded to the outside of the internal supporting warp thread 1, the internal supporting warp thread 1 being composed of multiple independent warp threads arranged along the circumferential direction, and the diameter and arrangement density of the warp threads being selected and matched according to the strength requirements, and several external spiral weft threads 2 being provided.

[0021] Example 2: The present invention provides a technical solution in which a steel wire mesh belt is spirally welded to the outside of the internal supporting warp 1 by a welding device, and the steel wire mesh belt is simultaneously welded to the internal supporting warp 1 and the external spiral weft 2 by a welding machine.

[0022] Example 3: like Figure 2-3 As shown, the present invention provides a technical solution in which there are no fewer than three outer spiral weft threads 2 arranged in a double layer, wherein the inner layer has two outer spiral weft threads 2 arranged in parallel, and the outer layer has a single outer spiral weft thread 2. The three outer spiral weft threads 2 are welded together by high voltage and low current, so that the three outer spiral weft threads 2 form a three-strand triangular structure. It is preferable that the single outer spiral weft thread 2 of the outer layer is threaded steel, because threaded steel has a better welding effect. The two outer spiral weft threads of the inner layer are selected as threaded steel.

[0023] Example 4: like Figure 4-6 As shown, the present invention provides a technical solution in which there are no fewer than five outer spiral weft threads 2 arranged in a double layer, wherein the inner layer has three outer spiral weft threads 2 arranged in parallel, and the outer layer has two outer spiral weft threads 2 arranged in parallel. The five outer spiral weft threads 2 are welded together by high voltage and low current, so that the five outer spiral weft threads 2 form a five-strand trapezoidal structure. Among them, the two outer spiral weft threads 2 arranged in parallel on the outer layer can be preferred as threaded steel, because threaded steel has a better welding effect; The three parallel outer spiral weft threads 2 of the inner layer are selected as threaded steel.

[0024] Example 5: like Figure 7-9 As shown, the present invention provides a technical solution in which there are no fewer than six outer spiral weft threads 2 arranged in three layers, wherein the inner layer has three outer spiral weft threads 2 arranged in parallel, the middle layer has two outer spiral weft threads 2 arranged in parallel, and the outer layer has a single outer spiral weft thread 2 arranged. The six outer spiral weft threads 2 are welded together by high voltage and low current, so that the six outer spiral weft threads 2 form a six-strand tower-shaped structure.

[0025] Among them, it is preferable to have two middle-layer outer spiral weft threads arranged side by side as threaded steel, because threaded steel has a better welding effect; The outer spiral weft 2, consisting of a single outer layer and three inner layers, is selected as threaded steel.

[0026] If the internal support warp 1 is threaded steel, then two middle-layer outer spiral weft threads 2 can be arranged side by side as threaded steel, because threaded steel has a better welding effect.

[0027] Example 6: like Figure 10-13As shown, the present invention provides a technical solution: a multi-layered steel skeleton pipe, with internal support warp 1 and external spiral weft 2, and an outer composite plastic pipe body 3 covered by an extrusion device. The internal support warp 1 and the external spiral weft 2 can be made of rebar. An external adhesive multi-angle detection and protection mechanism 4 is installed on the outside of the main body 3 of the composite plastic pipe; The external adhesive multi-angle detection and protection mechanism 4 includes a connecting film 401, a mounting connecting box 402, an internal connecting block 403, an elastic connecting piece 404, a connecting cylinder 405, a locking screw 406, a splicing threaded cylinder 407, a mounting sleeve 408, a mounting inner slide rod 409, a rubber rectangular mounting block 410, a pressure sensor 411, a sealing protective film 412, a splicing retaining ring 413, an arc-shaped mounting groove 414, a connecting arc-shaped rubber block 415, a tension sensor 416, and a traction cable 417. A connecting film 401 is evenly and equidistantly bonded to the outer side of the composite plastic pipe body 3 along the circumferential direction. An installation connection box 402 is bonded to the outer side of the connecting film 401. An internal connecting block 403 is filled inside the installation connection box 402. An elastic connecting piece 404 is bonded to the bottom between the two installation connection boxes 402. Connecting cylinders 405 are embedded in the ends of two adjacent internal connecting blocks 403 by adhesive. Locking screws 406 are fixedly connected to the two corners of one end of the elastic connecting piece 404 at the ends of the two connecting cylinders 405. Splicing threaded cylinders 407 are rotatably installed at the two corners of the other end of the elastic connecting piece 404 at the ends of the other two connecting cylinders 405. The two axially adjacent mounting connecting boxes 402 are aligned with each other. The locking screw 406 and the splicing threaded cylinder 407 correspond to each other, and the locking screw 406 and the splicing threaded cylinder 407 are connected to each other by threads; An installation sleeve 408 is embedded in the middle of one end of an internal connecting block 403, and an installation inner slide rod 409 is embedded in the middle of one end of another internal connecting block 403. A rubber rectangular mounting block 410 is fixedly sleeved on the outside of the mounting sleeve 408. A pressure sensor 411 is embedded in the middle of the top of the rubber rectangular mounting block 410. A sealing protective film 412 is glued to the outside of the mounting connection box 402. The pressure sensor 411 is connected to an external receiving device through a data cable. A rectangular slot is opened in the middle of the top surface of the sealing protective film 412 at the position corresponding to the outside of the rubber rectangular mounting block 410. A splicing retainer 413 is symmetrically snapped into the middle of the outer side of the composite plastic pipe body 3. An arc-shaped installation groove 414 is evenly and equidistantly opened on the inner side of the splicing retainer 413 along the circumferential direction. A connecting arc-shaped rubber block 415 is snapped into the inside of the arc-shaped installation groove 414 by adhesive. A tension sensor 416 is embedded in the middle of one end of the connecting arc-shaped rubber block 415. A traction cable 417 is fixedly connected between two adjacent tension sensors 416. The splicing joint of the splicing retainer 413 is spliced ​​by protrusions and grooves, and the splicing joint of the splicing retainer 413 is connected by adhesive. The inner arc surface of the splicing retainer 413 is tightly fitted with the outer side of the composite plastic pipe body 3. The outer arc surface of the connecting arc-shaped rubber block 415 is tightly slidably attached to the inner wall of the arc-shaped mounting groove 414. The tension sensor 416 is connected to the external receiving device through a data cable. Through the cooperation between the internal components of the external adhesive multi-angle detection and protection mechanism 4, the detection process during the installation and use of the steel-reinforced composite plastic pipe is optimized. The pressure sensor 411 and tension sensor 416 on the outside of the composite plastic pipe body 3 monitor the external state of the pipe in real time. This ensures that changes in the surrounding soil layer can be detected in time during the use of the steel-reinforced composite plastic pipe, and that the pipe can respond in time when its own shape changes. This effectively expands the function of the steel-reinforced composite plastic pipe and realizes the synchronous detection of the internal and external state of the steel-reinforced composite plastic pipe. When the steel-reinforced composite plastic pipe is installed and used in areas with unstable soil layers, it can ensure that the steel-reinforced composite plastic pipe can be used normally while also taking into account the function of detecting the surrounding soil environment. This effectively improves the convenience of maintenance of the steel-reinforced composite plastic pipe. Meanwhile, the splicing structure design of the internal connecting block 403 and splicing retainer 413 allows for the selection and installation of various external components of the steel-reinforced composite plastic pipe as needed after the main body is assembled, further improving the convenience of installation and use of the steel-reinforced composite plastic pipe. At the same time, the adjustment of the locking screw 406 and splicing threaded cylinder 407 can be used to adjust the slightly bent pipe, and the external reinforcement of the steel-reinforced composite plastic pipe is achieved by installing the sleeve 408 and installing the inner sliding rod 409, which improves the overall bending strength of the steel-reinforced composite plastic pipe and further enhances the overall structural strength of the steel-reinforced composite plastic pipe.

[0028] The working principle and usage process of this invention: In practical applications, during the use of steel-reinforced composite plastic pipes, the main body 3 of the composite plastic pipe protects the inner supporting warp 1 and the outer spiral weft 2, preventing the internal steel skeleton from rusting and aging rapidly during use. Simultaneously, the unique triangular arrangement of the outer spiral weft 2 improves the stress distribution during use. When pipe pressure increases, the outer spiral weft 2 evenly disperses stress through the triangular structure, transferring the pressure originally released radially into axial stress, effectively suppressing radial deformation of the pipe wall. Meanwhile, the inner supporting warp 1 provides axial rigid support. Together, these two factors significantly enhance the overall pressure-bearing capacity and impact resistance of the pipe, effectively preventing pipe bursting during use and thus significantly improving the overall service life of the steel-reinforced composite plastic pipe. After the steel-framed composite plastic pipe is installed, the overall condition of the pipe needs to be inspected according to requirements. The installation connection box 402 and its components are installed on the outside of the composite plastic pipe body 3 through the connecting film 401. The side of the installation connection box 402 is protected by the elastic connecting piece 404. The connecting cylinder 405 and its connected components are installed on the side of the installation connection box 402 through the internal connecting block 403. The splicing threaded cylinder 407 is twisted so that it moves axially along the outside of the locking screw 406 under the action of the thread. As the splicing threaded cylinder 407 and the locking screw 406 approach each other, the two installation connection boxes 402 and the internal connecting block 403 are pulled to approach each other synchronously. The taut locking screw 406 and splicing threaded cylinder 407 are used to assist in the correction of the outside of the composite plastic pipe, so as to correct the pipe that is slightly bent under pressure. Then, the pressure sensor 411 is installed on the outside of the mounting sleeve 408 through the rubber rectangular mounting block 410, and the side cavity of the rubber rectangular mounting block 410 is sealed by the sealing protective film 412 to prevent external impurities from accumulating on the outside of the locking screw 406 and the mounting inner slide rod 409 and affecting the normal movement of the splicing threaded cylinder 407 and the mounting sleeve 408. Multiple sets of pressure sensors 411 arranged in the circumferential direction are used to detect the pressure on the outside of the pipeline to ensure that the pressure in each direction on the outside of the pipeline can be detected independently after the pipeline is buried in the soil. This can detect abnormal changes in the soil layer during normal use of the pipeline, and can also indirectly detect the radial deformation state of the pipeline when deformation occurs. When the steel-reinforced composite plastic pipe is subjected to external load for a long time, it will slowly bend. When it is necessary to detect the axial bending of the steel-reinforced composite plastic pipe, the components installed inside the arc-shaped mounting groove 414 are installed to the outside of the composite plastic pipe body 3 through the splicing clamp 413. The arc-shaped rubber block 415 and the tension sensor 416 are installed to the side of the composite plastic pipe body 3 through the arc-shaped mounting groove 414. When the composite plastic pipe body 3 bends, the traction cable 417 on one side of the composite plastic pipe body 3 gradually tightens, while the traction cable 417 on the other side gradually loosens. Then, the tension on the traction cable 417 is detected by the tension sensor 416, and the bending direction and degree of bending of the composite plastic pipe body 3 are indirectly detected by the circumferentially arranged tension sensors 416.

[0029] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-layered steel-framed pipe, comprising internal supporting warp threads (1), characterized in that: The internal support warp (1) is spirally welded with an external spiral weft (2). The internal support warp (1) is composed of multiple independent warp lines arranged along the circumferential direction. The diameter and arrangement density of the warp lines are selected and matched according to the strength requirements. The external spiral weft (2) is provided with several lines. The inner supporting warp (1) and the outer spiral weft (2) are covered with a composite plastic pipe body (3) by an extrusion equipment. The composite plastic pipe body (3) is provided with an external adhesive multi-angle detection and protection mechanism (4) on the outside. The external adhesive multi-angle detection and protection mechanism (4) includes a connecting film (401), a mounting connecting box (402), an internal connecting block (403), an elastic connecting piece (404), a connecting cylinder (405), a locking screw (406), a splicing threaded cylinder (407), a mounting sleeve (408), a mounting inner slide rod (409), a rubber rectangular mounting block (410), a pressure sensor (411), a sealing protective film (412), a splicing retaining ring (413), an arc-shaped mounting groove (414), a connecting arc-shaped rubber block (415), a tension sensor (416), and a traction cable (417). The composite plastic pipe body (3) has connecting films (401) evenly bonded at equal intervals along the circumferential direction on the outside. The connecting films (401) have mounting connection boxes (402) bonded to the outside. Two axially adjacent mounting connection boxes (402) are aligned with each other. The mounting connection boxes (402) are filled with internal connecting blocks (403). An elastic connecting piece (404) is bonded between the bottoms of the two mounting connection boxes (402). A connecting cylinder (405) is embedded between the ends of two axially adjacent internal connecting blocks (403) by adhesive. A locking screw (406) is fixedly connected to one end and two corners of the elastic connecting piece (404) at the ends of the two connecting cylinders (405). A splicing threaded cylinder (407) is rotatably installed at the other end and two corners of the elastic connecting piece (404) at the ends of the other two connecting cylinders (405). The locking screw (406) and the splicing threaded cylinder (407) correspond to each other and are connected to each other by threads. The locking screw (406) and the splicing threaded cylinder (407) adjust the pipeline. An installation sleeve (408) is embedded in the middle of one end of one of the internal connecting blocks (403), and an installation inner slide rod (409) is embedded in the middle of one end of the other internal connecting block (403). A rubber rectangular mounting block (410) is fixedly sleeved on the outside of the mounting sleeve (408). A pressure sensor (411) is embedded in the middle of the top of the rubber rectangular mounting block (410). A sealing protective film (412) is adhered to the outside of the mounting connection box (402).

2. The multi-layered steel skeleton pipe according to claim 1, characterized in that, The inner supporting warp (1) is spirally welded with a steel wire mesh belt by a welding equipment. The steel wire mesh belt is simultaneously welded to the inner supporting warp (1) and the outer spiral weft (2) by a welding machine.

3. A multi-layered steel-framed pipe according to any one of claims 1-2, characterized in that, The outer spiral weft (2) has no less than three strands arranged in a double layer, with two outer spiral wefts (2) arranged side by side in the inner layer and a single outer spiral weft (2) in the outer layer. The three outer spiral wefts (2) are welded together by high voltage and low current, so that the three outer spiral wefts (2) form a three-strand triangular structure.

4. A multi-layered steel-framed pipe according to any one of claims 1-2, characterized in that, The outer spiral weft (2) has no less than five strands and is arranged in two layers. The inner layer has three outer spiral wefts (2) arranged in parallel, and the outer layer has two outer spiral wefts (2) arranged in parallel. The five outer spiral wefts (2) are welded together by high voltage and low current so that the five outer spiral wefts (2) form a five-strand trapezoidal structure.

5. A multi-layered steel-framed pipe according to any one of claims 1-2, characterized in that, The outer spiral weft (2) consists of no less than six strands arranged in three layers, with three outer spiral wefts (2) arranged in parallel in the inner layer, two outer spiral wefts (2) arranged in parallel in the middle layer, and a single outer spiral weft (2) arranged in the outer layer. The six outer spiral wefts (2) are welded together by high voltage and low current to form a six-strand tower structure.

6. A multi-layered steel-framed pipe according to claim 1, characterized in that, The pressure sensor (411) is connected to an external receiving device via a data cable, and a rectangular slot is provided on the top center of the sealing protective film (412) at the position corresponding to the outer side of the rubber rectangular mounting block (410).

7. A multi-layered steel-framed pipe according to claim 1, characterized in that, The composite plastic pipe body (3) is symmetrically snapped with splicing rings (413) on the middle of the outer side. The splicing rings (413) are evenly spaced with arc-shaped installation grooves (414) along the circumferential direction on the inner side. The arc-shaped installation grooves (414) are connected with connecting arc-shaped rubber blocks (415) by adhesive. A tension sensor (416) is embedded in the middle of one end of the connecting arc-shaped rubber block (415). A traction cable (417) is fixedly connected between two adjacent tension sensors (416).

8. A multi-layered steel-framed pipe according to claim 1, characterized in that, The splicing ring (413) is spliced ​​by protrusions and grooves, and the splicing ring (413) is connected by adhesive. The inner arc surface of the splicing ring (413) is tightly fitted with the outer side of the composite plastic pipe body (3). The outer arc surface of the connecting arc-shaped rubber block (415) is tightly slidably attached to the inner wall of the arc-shaped mounting groove (414), and the tension sensor (416) is connected to an external receiving device via a data cable.

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