Cable prefabricated calandria and processing method thereof

Through the dot matrix core tube tooling and forming hole design and mold frame, combined with the outward expansion mechanism and rotating parts control, the problems of aperture deviation and mold removal difficulty in the processing of cable prefabricated pipes are solved, and efficient and precise pipe production is achieved.

CN120657650AActive Publication Date: 2025-09-16EAST CHINA POWER TRANSMISSION & TRANSFORMATION ENG +2
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Patent Information

Application Number
CN202511159242.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-19
Publication Date
2025-09-16
Estimated Expiration
2045-08-19

AI Technical Summary

Technical Problem

During the production and processing of existing cable prefabricated conduits, the airbag forming hole process causes the aperture to bend and offset, and the airbag plus lining forming hole process causes wrinkles, which makes it difficult to meet customer usage needs.

Method used

The core tube fixture and forming hole design with dot matrix distribution are combined with the connecting slot and mold frame. The radial expansion of the outer plate is driven by the external expansion mechanism to ensure the aperture accuracy and modular assembly. The expansion state is controlled by the rotating parts to avoid displacement and adhesion during the casting process.

Benefits of technology

It achieves high-precision aperture control, shortens the pouring period, improves production efficiency, ensures the dimensional accuracy of the pipes and the flatness of the cable channels, and reduces friction damage between the cables and the pipe walls.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a cable prefabricated calandria and a processing method thereof. The cable prefabricated calandria comprises a prefabricated calandria, a calandria mold and a core tube tool, the calandria mold is arranged on the outer side of the prefabricated calandria, the inner end of the calandria mold is connected with at least two sets of core pipe tools, pouring of the prefabricated calandria can be achieved under mutual cooperation, production management and control over the prefabricated calandria can be effectively improved, the production quality of the prefabricated calandria can be improved, and the production cost is reduced. The calandria mold comprises a bottom plate, a front mold plate, a rear mold plate, a side mold plate, a through hole, a reinforcing rib and other assemblies, the appearance of the prefabricated calandria can be limited, it is guaranteed that the produced prefabricated calandria is consistent, the core pipe tool comprises a middle shaft, an external expansion mechanism, an outer plate and other assemblies, core pulling smoothness can be guaranteed under mutual cooperation, damage to the inner side of a forming hole is avoided, and the production efficiency is improved. The design strength and the service life of the prefabricated calandria can be met, and the use requirements of people are met.
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Description

Technical Field

[0001] The present invention relates to the technical field of cable installation, in particular to a prefabricated cable conduit and a processing method thereof. Background Art

[0002] Prefabricated cable conduit is a modular cable protection piping system that is pre-fabricated in the factory. It is cast from concrete or composite materials, and is embedded with metal or plastic core tube tooling arranged according to design requirements to form a regular cable channel. Its core feature is that it is mass-produced through standardized molds and directly assembled on site, avoiding the on-site formwork and maintenance processes of traditional cast-in-place conduits. The typical structure includes a shell with reinforcing ribs, precisely positioned formed holes and quick-connect slots. It has the advantages of adjustable aperture, strong pressure resistance and fast construction. It is mainly used in urban integrated pipeline corridors, power tunnels and other infrastructure scenarios that require high-precision and high-efficiency cable laying.

[0003] During the production and processing of some existing prefabricated cable conduits, processes such as airbag forming holes and airbag plus lining forming holes are used. In the airbag forming hole process, the airbag will float up when the concrete is poured, resulting in bending and deviation of the formed aperture. The airbag plus lining forming hole process may cause wrinkles in the airbag patch area, causing marks on the pipe wall, and the bonding force with the concrete surface is large, making it difficult to remove the mold. It has the disadvantages of being difficult to observe in advance and difficult to remove the mold later, making it difficult to meet customer usage needs. Summary of the Invention

[0004] The object of the present invention is to provide a prefabricated cable conduit and a processing method thereof to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a prefabricated cable tube, comprising a prefabricated tube, a tube mold connected to the outside of the prefabricated tube, and at least two groups of core tube tooling arranged in an end array inside the tube mold; The outer side of the prefabricated row pipe is provided with at least two groups of forming holes in a lattice pattern, and both sides of the prefabricated row pipe are provided with at least two groups of connecting slots near the front end.

[0006] By adopting the above technical solution, the corresponding design of the dot-matrix distributed core tube tooling and the forming holes can achieve standardized prefabrication and shorten the casting period. Multiple sets of core tube tooling and forming holes form a modular channel, which is convenient for adding or reducing the number of cables in the later stage. The design of the connecting slot supports the rapid docking between prefabricated pipes, which is convenient for system expansion or local replacement.

[0007] Preferably, the pipe arrangement mold includes a base plate, front and rear templates, side templates, through holes and reinforcing ribs. The front and rear ends of the top of the base plate are connected to a group of front and rear templates, and the left and right ends of the top surface of the base plate are provided with a group of side templates, and the surfaces of the front and rear templates are provided with no less than two groups of through holes, and the outer sides of the front and rear templates and the side templates are provided with reinforcing ribs.

[0008] By adopting the above technical solution, the base plate, front and rear formwork and side formwork can form a standardized mold frame, which is convenient for quick assembly and disassembly, realizes modular assembly, and improves production efficiency. The reinforcement ribs are distributed on the outside of the front and rear formwork and side formwork to enhance the overall rigidity, prevent deformation during concrete pouring, and ensure the dimensional accuracy of the prefabricated pipes.

[0009] Preferably, the core tube tooling includes a central axis, an outward expansion mechanism and outer plates, and the front and rear positions outside the central axis are connected to three groups of outer plates through the outward expansion mechanism.

[0010] By adopting the above technical solution, the outward expansion mechanism can drive the radial expansion and contraction of the three sets of outer plates, flexibly adjust the forming diameter of the core tube tooling, meet the prefabrication requirements of pipes of different specifications, reduce production line adjustment time, and improve efficiency. In addition, the three sets of outer plates are symmetrically distributed, forming a stable support after expansion, avoiding uneven force during pouring and causing deformation of the holes, and ensuring the roundness and surface flatness of the inner wall of the pipe hole.

[0011] Preferably, a group of fixed blocks are provided at the front end of the central shaft, and a group of rotating parts are connected to the outer side of the central shaft near the front end.

[0012] By adopting the above technical solution, the fixed block serves as the reference structure at the front end of the central axis and can cooperate with the external fixing device to achieve rapid centering and locking of the core tube tooling to avoid displacement during the pouring process. The rotating part can rotate freely at the front end of the central axis to control the opening and closing of the external expansion mechanism. The expansion state of the outer plate can be adjusted without disassembling the mold, which is convenient for loosening the contact between the outer plate and the concrete during the demolding stage, reducing adhesion and facilitating the removal of the core tube tooling.

[0013] Preferably, the outward expansion mechanism includes a connecting inner plate, a movable groove, a movable bolt, a connecting block 1, a movable sleeve, an outward expansion arm and a connecting block 2. A group of connecting inner plates is provided at a position near the middle end of the outer side of the central axis, a group of movable grooves are provided on the surface of the connecting inner plate corresponding to the outer plate, a group of movable bolts are provided in the movable grooves, one end of the movable bolt is connected to the connecting block 1, and the end of the connecting block 1 close to the outer plate is connected to the inner side of the outer plate. A group of movable sleeves is provided at a position near the rotating part on the outer side of the central axis, three groups of outward expansion arms are connected to the outer side of the movable sleeve, and the other end of the outward expansion arm is provided with a group of connecting block 2, and the other end of the connecting block 2 is connected to the inner side of the outer plate.

[0014] By adopting the above technical solution, the movable sleeve and the external expansion arm constitute the main drive system. The rotating part drives the movable sleeve to move axially, and the outer plate is pushed synchronously by three sets of external expansion arms to achieve equidistant radial expansion, ensure the roundness of the channel, avoid the deviation of traditional manual adjustment, and achieve high-precision controllable expansion to meet complex aperture requirements.

[0015] Preferably, an external thread is provided on the outer side of the central shaft.

[0016] Preferably, the inner side of the rotating member is provided with an internal thread corresponding thereto, and a set of force arms are provided on both the left and right ends of the rotating member.

[0017] By adopting the above technical solution, the rotating part can cooperate with the external thread on the outside of the central axis to achieve precise linear drive, millimeter-level aperture control, and self-locking and anti-backoff characteristics. The thread cooperation is automatically locked in the absence of external force, avoiding accidental contraction of the external expansion mechanism during concrete vibration, thereby ensuring molding stability.

[0018] Preferably, a steel frame is provided at the inner end of the prefabricated row pipe.

[0019] By adopting the above technical solution, the overall strength of the prefabricated pipe can be improved.

[0020] Preferably, the bottom plate, front and rear templates and side templates are connected by bolts, and the contact surfaces are all provided with sealant.

[0021] By adopting the above technical solution, the sealing between the pipe arrangement molds can be improved.

[0022] A method for processing a prefabricated cable conduit comprises the following steps: S1: Install the base plate, front and rear templates, and side templates in sequence, and connect the core tube fixtures through the through holes; S2: Before use, clean the bottom plate, front and rear formwork, side formwork and the outer side of the outer plate, and apply release agent on their inner surface to ensure smooth demoulding of the components; S3: After pre-processing the steel bars through rust removal, straightening, cutting, and welding, they are assembled into a steel skeleton according to the design requirements and fixed in the pipe-laying mold. Steel plates are embedded at both ends of the prefabricated sections of the prefabricated pipes and connected with high-strength bolts; S4: Pour the concrete from the top of the pipe arrangement mold, first pouring from the four corners inside the pipe arrangement mold, and then gradually pouring inwards. During pouring, use a vibrating rod to insert and vibrate the concrete, and pour in three layers; S5: After pouring is completed, lay plastic film on the top of the pipe mold to meet the requirements of covering and curing, and wait for the concrete to solidify; S6: After the concrete solidifies, the pipe mould is removed and the core pipe tooling is separated by core extraction to complete the prefabrication of the pipe.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a pipe mold installed on the outside of the prefabricated pipes. The pipe mold includes a base plate, front and rear templates, side templates, through holes, and reinforcing ribs. The mold cooperates with each other to achieve the final casting of the prefabricated pipes. The reinforcing ribs installed on the outside of the front and rear templates and side templates can improve the strength of the front and rear templates and side templates, effectively resisting lateral pressure during the concrete pouring process, thereby ensuring the molding quality of the prefabricated pipes. 2. The present invention adopts a core tube fixture disposed in the through hole. The core tube fixture includes components such as a central axis, an external expansion mechanism, and an outer plate. Under mutual cooperation, the external expansion mechanism can push and expand the outer plate outward to meet the requirements of pipes of different sizes and diameters. After the outer plate is expanded, a stable support is formed, which can avoid the deformation of the hole caused by uneven force during pouring, ensure the roundness and surface smoothness of the inner wall of the pipe hole, effectively reduce the friction coefficient between the cable and the pipe wall, and reduce damage to the outer side of the cable; 3. The present invention is provided with a fixed block at the front end of the central axis, and a rotating part is provided at the rear end of the fixed block. The rotating part is sleeved on the outside of the central axis and is connected to the central axis through an internal thread. The rotating part can be driven to move along the central axis toward the outward expansion mechanism by rotating the rotating part, and the outward expansion mechanism is extruded and driven, which can improve the control of the expansion size of the outer plate and meet the different size requirements of the row pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic structural diagram of the pipe arrangement mold of the present invention; Figure 3 This is a schematic diagram of the core tube tooling structure of the present invention; Figure 4 It is a schematic diagram of the structure of the outward expansion mechanism of the present invention.

[0025] In the figure: prefabricated pipe arrangement-1, pipe arrangement mold-2, core pipe tooling-3, forming hole-11, connecting slot-12, bottom plate-21, front and rear templates-22, side templates-23, through hole-24, reinforcement rib-25, central axis-31, outward expansion mechanism-32, outer plate-33, fixed block-311, rotating part-312, connecting inner plate-321, movable slot-322, movable bolt-323, connecting block 1-324, movable sleeve-325, outward expansion arm-326, connecting block 2-327. DETAILED DESCRIPTION

[0026] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0027] See also Figure 1-Figure 3The present invention provides a cable prefabricated tube and a processing method thereof, a cable prefabricated tube, comprising a prefabricated tube 1, the outer side of the prefabricated tube 1 is in contact with a tube mold 2, the tube mold 2 can shape the prefabricated tube 1, and the inner end of the tube mold 2 is provided with no less than two groups of core tube tooling 3 in a dot matrix manner, and the outer side of the prefabricated tube 1 is provided with no less than two groups of forming holes 11 in a dot matrix manner, and both sides of the prefabricated tube 1 near the front end are provided with no less than two groups of connecting slots 12, which is convenient for realizing modular expansion of the prefabricated tube 1, wherein a steel skeleton is pre-buried at the inner end of the prefabricated tube 1, which can improve the overall strength of the prefabricated tube 1.

[0028] Specifically, the corresponding design of the dot-matrix distributed core tube tooling 3 and the forming holes 11 can realize standardized prefabrication and shorten the casting period. Multiple groups of core tube tooling 3 and forming holes 11 form a modular channel, which is convenient for increasing or decreasing the number of cables in the later stage; the design of the connecting slot 12 supports the rapid docking between prefabricated pipes 1, which is convenient for system expansion or local replacement.

[0029] See also Figure 2 The pipe arrangement mold 2 of the present invention includes a bottom plate 21, front and rear templates 22, side templates 23, through holes 24 and reinforcing ribs 25. The front and rear ends of the top surface of the bottom plate 21 are connected to a group of front and rear templates 22 by bolts, and the left and right ends of the top surface of the bottom plate 21 are connected to a group of side templates 23 by bolts, and the contact surfaces are coated with sealant, which can improve the sealing between the pipe arrangement molds 2 and prevent concrete leakage. There are no less than two groups of through holes 24 on the surfaces of the front and rear templates 22, and reinforcing ribs 25 are welded to the outside of the front and rear templates 22 and the side templates 23 to improve the overall strength and avoid deformation.

[0030] Specifically, the base plate 21, the front and rear formworks 22 and the side formworks 23 can form a standardized mold frame, which is convenient for quick assembly and disassembly, realizes modular assembly, and improves production efficiency. The reinforcing ribs 25 are distributed on the outside of the front and rear formworks 22 and the side formworks 23, which can enhance the overall rigidity, prevent deformation during concrete pouring, and ensure the dimensional accuracy of the prefabricated drainage pipe 1.

[0031] See also Figure 3-Figure 4 The core tube tooling 3 includes a central axis 31, an external expansion mechanism 32 and an outer plate 33. The front and rear positions of the outer side of the central axis 31 are connected to three groups of outer plates 33 through the external expansion mechanism 32. Among them, the front end of the central axis 31 is fixedly connected to a group of fixed blocks 311, and a group of rotating parts 312 are sleeved on the outer side of the central axis 31 near the front end. Furthermore, an external thread is provided on the outside of the central axis 31, and a corresponding internal thread is provided on the inside of the rotating part 312. A group of force arms are provided on the left and right ends of the rotating part 312. The rotating part 312 can cooperate with the external thread on the outside of the central axis 31 and move along the central axis 31. It has a self-locking and anti-retraction feature. The threaded fit is automatically locked when there is no external force, thereby avoiding accidental contraction of the external expansion mechanism 32 during concrete vibration and ensuring molding stability.

[0032] Specifically, the outward expansion mechanism 32 can drive the three groups of outer plates 33 to expand and contract radially, flexibly adjust the forming diameter of the core tube tooling 3, meet the prefabrication requirements of pipes of different specifications, reduce production line adjustment time, and improve efficiency. The three groups of outer plates 33 are symmetrically distributed, forming a stable support after expansion to avoid deformation of the holes caused by uneven force during pouring, and ensure the roundness and surface flatness of the inner wall of the pipe hole. The fixed block 311 serves as the reference structure at the front end of the central axis 31, and can cooperate with the external fixing device to achieve rapid centering and locking of the core tube tooling 3 to avoid displacement during pouring. The rotating part 312 can rotate freely at the front end of the central axis 31, and can control the opening and closing of the outward expansion mechanism 32. The expansion state of the outer plate 33 can be adjusted without disassembling the mold, which is convenient for loosening the contact between the outer plate 33 and the concrete during the demolding stage, reducing adhesion, and facilitating the removal of the core tube tooling.

[0033] See also Figure 3-Figure 4 The expansion mechanism 32 includes a connecting inner plate 321, a movable groove 322, a movable bolt 323, a connecting block 1 324, a movable sleeve 325, an expansion arm 326 and a connecting block 2 327. A group of connecting inner plates 321 are fixedly connected to the position near the middle end of the outer side of the central axis 31. A group of movable grooves 322 are opened on the surface of the connecting inner plate 321 at the position corresponding to the outer plate 33. A group of movable bolts 323 are slidably connected in the movable grooves 322. One end of the movable bolt 323 is fixedly connected to the connecting block 1 324. The end of the connecting block 1 324 near the outer plate 33 is fixedly connected to the inner side of the outer plate 33. When the outer plate 33 expands outward, the movable bolt 323 can be driven to move along the movable groove 322 through the connecting block 1 324. A group of movable sleeves 325 are installed on the outside of the central axis 31 near the rotating member 312. Three groups of outward expansion arms 326 are hinged on the outside of the movable sleeve 325. The other end of the outward expansion arm 326 is hinged to a group of connecting block 2 327. The other end of the connecting block 2 327 is fixedly connected to the inner side of the outer plate 33. When the movable sleeve 325 is squeezed inward by the rotating member 312, it can squeeze the rotating outward expansion arm 326 and expand the three groups of outer plates 33 outward through the connecting block 2 327.

[0034] Specifically, the movable sleeve 325 and the outward expansion arm 326 constitute the main drive system. The rotating part 312 drives the movable sleeve 325 to move axially, and the outer plate 33 is synchronously pushed by the three groups of outward expansion arms 326 to achieve equidistant radial expansion, ensure the roundness of the channel, avoid the deviation of traditional manual adjustment, achieve high-precision controllable expansion, and adapt to complex aperture requirements.

[0035] A method for processing a prefabricated cable conduit comprises the following steps: S1: Two sets of front and rear templates 22 and side templates 23 are installed in sequence on the front, rear, left and right ends of the top surface of the bottom plate 21 and fixedly connected by bolts. The contact surfaces and gaps are coated with sealant, and then the core tube tooling 3 is connected through the through hole 24. During installation, lubricant is applied to the outer side of the core tube tooling 3 where the outer plate 33 is contracted, and then a rubber sleeve is put on and placed into the through hole 24 in sequence. Both ends of each set of central axis 31 must extend to the outer ends of the front and rear templates 22 by no less than 15 cm. After all the core tube tooling 3 are installed in place, the rotating part 312 is rotated, and the rotating part 312 squeezes the movable sleeve 325 inward, driving the outer expansion arm 326 to rotate, supporting the outer plate 33 and expanding it to an outer diameter of 175 mm. S2: Before use, clean the outer sides of the bottom plate 21, the front and rear templates 22, and the side templates 23, and apply a release agent on their inner surfaces to ensure smooth demoulding of the components; S3: After pre-processing the steel bars through rust removal, straightening, cutting, and welding, they are assembled into a steel skeleton according to the design requirements and fixed in the pipe-laying mold 2. At the same time, steel plates are embedded at both ends of the prefabricated section of the prefabricated pipe 1 and connected with high-strength bolts. The main reinforcement adopts HRB400 grade, the connecting embedded steel bars adopt HRB500 grade, and the steel plates adopt Q355 grade; S4: Use a torpedo tank to transport concrete to the top of the pipe arrangement mold 2. First, pour from the four corners of the mold to help establish a stable foundation for the subsequent pouring work. Then gradually pour into the mold to ensure that the entire mold is evenly filled and the steel mesh and core tube tooling 3 laid inside are covered. It should be noted that this prefabricated pipe arrangement 1 has three rows of holes and the concrete needs to be poured in three layers. During the pouring process, select an insert-type, attached-type, or flat-plate vibrator according to the structure size and steel density to vibrate the concrete. The speed is between 12,000 rpm and 15,000 rpm. Vibrating the poured concrete can effectively remove bubbles in the concrete. Within this pouring pressure range, it is necessary to ensure that the concrete flows freely in the mold and sufficiently control the stability of the concrete under high pressure to prevent mold deformation or seal rupture due to excessive pressure. S5: After pouring is completed, a plastic film is laid on the top of the pipe mold 2 to meet the requirements of covering and curing, and wait for the concrete to solidify; S6: After the concrete solidifies and the concrete strength reaches above 2.5 MPa, the rotating part 312 is rotated and the movable sleeve 325 is pulled outward to shrink the outer plate 33 to an outer diameter of 15 cm and then withdraw it. After all the petal-shaped tooling is taken out, the rubber sleeve is pulled out to complete the prefabrication of the pipe.

[0036] The present invention provides a cable prefabricated drainage pipe and a processing method thereof, wherein a drainage pipe mold 2 is arranged on the outside of the prefabricated drainage pipe 1, and the drainage pipe mold 2 includes components such as a bottom plate 21, a front and rear template 22, a side template 23, a through hole 24 and a reinforcing rib 25, which cooperate with each other to realize the shaping and pouring of the prefabricated drainage pipe 1, and the reinforcing rib 25 arranged on the outside of the front and rear template 22 and the side template 23 can improve the strength of the front and rear template 22 and the side template 23, so that they can effectively resist lateral pressure during the concrete pouring process, thereby ensuring the molding quality of the prefabricated drainage pipe 1; a core pipe tool 3 is arranged in the through hole 24, and the core pipe tool 3 includes components such as a central axis 31, an outward expansion mechanism 32 and an outer plate 33, which cooperate with each other, The outer plate 33 is pushed outward to expand to meet the requirements of drainage pipes of different sizes, and a stable support is formed after the outer plate 33 is expanded, which can avoid the deformation of the holes due to uneven force during pouring, ensure the roundness and surface flatness of the inner wall of the drainage pipe hole, effectively reduce the friction coefficient between the cable and the pipe wall, and reduce damage to the outside of the cable; by setting a fixed block 311 at the front end of the central axis, a rotating part 312 is provided at the rear end of the fixed block 311, and the rotating part 312 is sleeved on the outside of the central axis 31 and connected to the central axis 31 through an internal thread. It can be driven by rotating the rotating part 312 to move along the central axis 31 toward the outward expansion mechanism 32, and the outward expansion mechanism 32 is extruded and driven, which can improve the control of the expansion size of the outer plate 33 and meet the different size requirements of drainage pipes.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A prefabricated cable conduit, characterized in that: It comprises a prefabricated tube arrangement (1), wherein the outer side of the prefabricated tube arrangement (1) is connected to a tube arrangement mold (2), and the inner end point of the tube arrangement mold (2) is provided with no less than two groups of core tube fixtures (3); The outer side of the prefabricated tube (1) is provided with at least two groups of forming holes (11) in a lattice pattern, and both sides of the prefabricated tube (1) are provided with at least two groups of connecting slots (12) near the front end; The core tube tooling (3) comprises a central axis (31), an outward expansion mechanism (32) and outer plates (33), wherein the front and rear positions of the outer sides of the central axis (31) are connected to three sets of outer plates (33) via the outward expansion mechanism (32).

2. The prefabricated cable conduit according to claim 1, characterized in that: The pipe arrangement mold (2) includes a bottom plate (21), front and rear templates (22), side templates (23), through holes (24) and reinforcing ribs (25). The front and rear ends of the top surface of the bottom plate (21) are connected to a group of front and rear templates (22). The left and right ends of the top surface of the bottom plate (21) are each provided with a group of side templates (23). The surfaces of the front and rear templates (22) are each provided with no less than two groups of through holes (24). The outer sides of the front and rear templates (22) and the side templates (23) are both provided with reinforcing ribs (25).

3. The prefabricated cable conduit according to claim 1, characterized in that: A group of fixed blocks (311) are provided at the front end of the central shaft (31), and a group of rotating parts (312) are connected to the outer side of the central shaft (31) near the front end.

4. The prefabricated cable conduit according to claim 1, characterized in that: The outward expansion mechanism (32) includes a connecting inner plate (321), a movable groove (322), a movable bolt (323), a connecting block (324), a movable sleeve (325), an outward expansion arm (326) and a connecting block (327). A group of connecting inner plates (321) are provided at a position near the middle end of the outer side of the central axis (31). A group of movable grooves (322) are provided at positions corresponding to the outer plates (33) on the surface of the connecting inner plates (321). A group of movable bolts (323) are provided in the movable grooves (322). One end of the moving bolt (323) is connected to a connecting block 1 (324), and one end of the connecting block 1 (324) close to the outer plate (33) is connected to the inner side of the outer plate (33). A group of movable sleeves (325) is provided on the outer side of the central axis (31) near the rotating member (312), and three groups of outward expansion arms (326) are connected to the outer side of the movable sleeves (325). The other end of each of the outward expansion arms (326) is provided with a group of connecting blocks 2 (327), and the other end of each of the connecting blocks 2 (327) is connected to the inner side of the outer plate (33).

5. The prefabricated cable conduit according to claim 4, characterized in that: The outer side of the central shaft (31) is provided with an external thread.

6. The prefabricated cable conduit according to claim 5, characterized in that: The inner side of the rotating member (312) is provided with an internal thread corresponding thereto, and the left and right ends of the rotating member (312) are both provided with a set of force arms.

7. The prefabricated cable conduit according to claim 1, characterized in that: The inner end of the prefabricated pipe (1) is provided with a steel frame.

8. The prefabricated cable conduit according to claim 2, characterized in that: The bottom plate (21), the front and rear templates (22) and the side templates (23) are connected by bolts, and the contact surfaces are all provided with sealant.

9. A method for processing a prefabricated cable conduit, according to any one of claims 1 to 8, characterized in that: The steps include: S1: Install the bottom plate (21), front and rear templates (22) and side templates (23) in sequence, and connect the core tube fixture (3) through the through hole (24); S2: Before use, clean the bottom plate (21), the front and rear templates (22), the side templates (23) and the outer side of the outer plate (33), and apply a release agent on their inner surfaces to ensure smooth demoulding of the component; S3: After pre-processing the steel bars by removing rust, straightening, cutting, and welding, they are assembled into a steel skeleton according to the design requirements and fixed in the pipe arrangement mold (2). Steel plates are embedded at both ends of the prefabricated section of the prefabricated pipe arrangement (1) and connected with high-strength bolts; S4: pouring concrete from above the pipe arrangement mold (2), first pouring from the four corners inside the pipe arrangement mold (2), and then gradually pouring it towards the inside, using a vibrating rod to insert and vibrate the concrete during pouring, and pouring in three layers; S5: After pouring is completed, a plastic film is laid on the top of the pipe arrangement mold (2) to meet the requirements of covering and curing, and wait for the concrete to solidify; S6: After the concrete solidifies, the pipe arrangement mold (2) is dismantled, and the core pipe tooling (3) is cored and separated, completing the prefabrication of the pipe arrangement.

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