PVC (polyvinyl chloride) electric power pipe convenient for threading at bending part

Abstract

The PVC electric power pipe comprises a bent electric power pipe, an inlet end supporting mechanism, an outlet end supporting mechanism, a bent part supporting mechanism and a threading mechanism, wherein the inlet end supporting mechanism and the outlet end supporting mechanism are arranged at the inlet end and the outlet end of the bent electric power pipe respectively; the bent part supporting mechanism is supported at the bent part of the bent electric power pipe; a limiting strip is arranged on the inner side wall of the bent power tube; the threading mechanism is driven by a steel wire rope to move; the inlet end supporting mechanism comprises an inlet supporting plate capable of being installed in the bent electric power pipe. The outlet end supporting mechanism comprises an outlet supporting plate capable of being installed in the bent electric power pipe. The bending position supporting mechanism comprises a first supporting frame, a second supporting frame and supporting assemblies, wherein the first supporting frame and the second supporting frame can be installed in the bending electric power pipe, and the supporting assemblies are arranged on the first supporting frame and the second supporting frame. According to the invention, threading work of a plurality of cables can be simply and efficiently completed, and the cables are supported, so that the cables are prevented from being in contact with a pipe wall and are prevented from being wound together; after threading is finished, the threading mechanism can be taken out of the bent electric power pipe and reused.

Description

Technical Field

[0001] The invention relates to the technical field of electric power pipes, and in particular to a PVC electric power pipe with a bend for convenient threading. Background Art

[0002] In today's power facility construction, PVC power pipes are widely used due to their good insulation, corrosion resistance and cost-effectiveness. However, in actual use, the threading problem of traditional PVC power pipes at the bends has gradually become prominent.

[0003] With the acceleration of urbanization and the continuous growth of electricity demand, the laying of power lines has become more and more complicated. In many cases, it is necessary to pass the cable through a PVC power pipe with a certain bending angle. However, the existing ordinary PVC power pipes usually have the following shortcomings at the bends: First, the change in the inner diameter at the bend may lead to an increase in threading resistance. When the number of cables is large, it is easy to get stuck at the bend, affecting the construction progress; secondly, when the cable passes through the bend of the power pipe, its surface may rub against the inner wall of the power pipe, causing the cable to be easily scratched, thereby reducing the service life and safety of the cable. Furthermore, when construction is carried out in some narrow spaces or complex terrains, due to the difficulty of threading at the bends, it often takes a lot of manpower and time to adjust and operate, which increases the construction cost and difficulty.

[0004] In summary, in order to meet the requirements of efficient, safe and convenient construction of modern power engineering, it is imperative to develop a PVC power pipe with easy threading at the bends. Summary of the invention

[0005] In view of the above problems, the present invention proposes a PVC power pipe with a bend that is convenient for threading, and the technical solution used is: A PVC electric power pipe with a bend for easy threading, comprising a bend electric power pipe, an inlet end support mechanism, an outlet end support mechanism, a bend support mechanism and a threading mechanism; a limit strip is provided on the inner side wall of the bend electric power pipe; The threading mechanism includes a connecting shaft, a mounting block and a driving plate 1 fixedly mounted on the connecting shaft, a mounting rod rotatably and elastically mounted on the mounting block, a mounting frame slidably and elastically mounted on the mounting rod, a supporting plate slidably mounted on the mounting frame, a clamping block fixedly mounted on the mounting frame, a driving plate 2 intermittently fixedly connected to the driving plate 1, a mounting cover, a pair of half-wire wheels 2 mounted on the mounting cover and capable of being freely combined, and a steel wire rope; the connecting shaft is fixedly mounted on the steel wire rope; a sliding ring elastically connected to the mounting block is slidably mounted on the connecting shaft; a connecting rod 3 is provided between the sliding ring and the supporting plate, one end of the connecting rod 3 is rotatably mounted on the sliding ring, and the other end is rotatably connected to the corresponding supporting plate; The inlet end support mechanism comprises an inlet support plate which can be installed in the bent power pipe and allows the cable to pass through, and a pair of half-reel one installed on the inlet support plate which can be freely combined; the steel wire rope is connected end to end, one end of which is sleeved on the reel formed by the two half-reel two, and the other end of which is sleeved on the reel formed by the two half-reel one; The outlet end support mechanism comprises an outlet support plate which can be installed in the bent power pipe and allows the cable to pass through; The support mechanism at the bending point includes a support frame 1 and a support frame 2 that can be installed in the bent power pipe, and support components provided on both the support frame 1 and the support frame 2; the support frame 1 is provided with a through hole 1, and the support frame 2 is provided with a through hole 2; a limit block is rotatably and elastically installed on the support frame 2, and the drive plate 2 can be embedded in the limit block.

[0006] Furthermore, a supporting roller is rotatably mounted on the clamping block.

[0007] Furthermore, a docking port is provided on the mounting rod, an embedding block which intermittently extends into the docking port is slidably and elastically installed on the connecting frame; a limit control rod which can push the embedding block is slidably and elastically installed on the inlet support plate.

[0008] Furthermore, the support assembly includes a linkage rod slidably installed in support frame one or support frame two, a transmission rod with one end placed on the linkage rod and the other end rotatably installed in support frame one or support frame two, a ratchet block slidably installed in support frame one or support frame two, a connecting rod one with one end rotatably installed on the transmission rod and the other end rotatably installed on the ratchet block, a ratchet bar elastically installed in support frame one or support frame two and meshing with the ratchet block, a friction support block rotatably installed on support frame one or support frame two, and a connecting rod two with one end rotatably installed on the ratchet block and the other end rotatably installed on the friction support block.

[0009] Furthermore, the outlet support mechanism also includes a wire splitter embedded in the outlet support plate, the wire splitter is provided with a wire outlet for the cable to pass through; the installation cover is provided with a card block, and the wire splitter is provided with a card slot corresponding to the card block.

[0010] Furthermore, a fixing block is slidably and elastically installed in the card slot, and an insertion slot is provided on the fixing block corresponding to the card slot; and a fixing hole is provided on the outlet support plate corresponding to the fixing block.

[0011] Furthermore, a clamping plate is elastically mounted on the mounting cover.

[0012] Furthermore, a support tube is fixedly mounted on the inlet support plate.

[0013] Furthermore, a limit support rod is fixedly installed on the support tube; and a support groove corresponding to the limit support rod is provided on the support plate.

[0014] Furthermore, a strong magnet is fixedly mounted on the driving plate 1; and the driving plate 2 is made of magnetic material.

[0015] Since the present invention adopts the above technical solution, the present invention has the following advantages: The present invention can simply and efficiently complete the threading of multiple cables through the coordinated design of the inlet end support mechanism, the outlet end support mechanism, the bending support mechanism and the threading mechanism; after the threading is completed, the threading mechanism can be taken out from the bent power pipe and reused, the inlet support plate is left at the inlet end, the support frame one and the support frame two are left at both ends of the bending, and the outlet support plate is left at the outlet end to support the cables, avoid contact between the cables and the pipe wall, and prevent the cables from being entangled. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is a schematic diagram of the structure of the present invention after the bent power tube is removed.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the AA section of the bent power tube of the present invention.

[0019] Figure 4 It is a schematic diagram of the assembly structure of the inlet end support mechanism, the bending support mechanism partial structure and the threading mechanism partial structure of the present invention.

[0020] Figure 5-Figure 6 It is a structural schematic diagram of the inlet end support mechanism of the present invention.

[0021] Figure 7-Figure 8 It is a partial structural schematic diagram of the inlet end support mechanism of the present invention.

[0022] Fig. 9 It is a schematic diagram of the assembly structure of the inlet end support mechanism part structure and the threading mechanism part structure of the present invention.

[0023] Figure 10-11 and Figure 13-14 It is a partial structural schematic diagram of the threading mechanism of the present invention.

[0024] Fig.12 It is a schematic diagram of the exploded structure of the mounting rod and the connecting frame in the threading mechanism of the present invention.

[0025] Fig.15 It is a schematic diagram of the assembly structure of the driving plate 1 and the bending support mechanism of the present invention.

[0026] Figure 16-Figure 19 It is a partial structural schematic diagram of the bending support mechanism of the present invention.

[0027] Figure 20-22 It is a schematic diagram of the assembly structure of the outlet end support mechanism, the bending support mechanism partial structure and the threading mechanism partial structure of the present invention.

[0028] Fig.23 It is a structural schematic diagram of the installation cover in the threading mechanism of the present invention.

[0029] Fig.24 For the present invention Fig.23 Schematic diagram of the local enlarged structure at point B in the middle.

[0030] Fig.25 It is a schematic structural diagram of the line splitter in the outlet end support mechanism of the present invention.

[0031] Fig.26 For the present invention Fig.25 Schematic diagram of the local enlarged structure at point C in the middle.

[0032] Fig. 27 It is a schematic diagram of the structure of the fixing block in the wire splitter of the present invention.

[0033] Fig.28 It is a schematic diagram of the assembly structure of the wiring board and the installation cover of the present invention.

[0034] Fig.29 It is a structural schematic diagram of the outlet end support mechanism of the present invention.

[0035] Fig.30 It is a schematic structural diagram of the outlet support plate in the outlet end support mechanism of the present invention.

[0036] Fig.31 It is a schematic diagram of the assembly structure of the second driving plate and the supporting mechanism part of the bending part of the present invention.

[0037] Fig.32 It is a schematic diagram of the assembly structure of the driving plate 2 and the limit block of the present invention.

[0038] Fig.33 It is a schematic diagram of the assembly structure of the second mounting plate and the second half-line wheel of the present invention.

[0039] Figure Number: 1-bend the power pipe; 101-limiting strip; 2-inlet end support mechanism; 201-inlet support plate (2011-support tube; 2012-limit support rod); 202-mounting plate 1; 203-half line wheel 1; 204-limit control rod; 3-export end support mechanism; 301-export support plate (3011-fixing hole); 302-wire splitter (3021-card slot; 3022-fixing block); 4-bending support mechanism; 401-support frame 1 (4011-through port 1); 402-support frame 2 (4021-through port 2; 4022-limiting block); 403-linking rod; 404-transmission rod; 405-connecting rod 1; 406-ratchet block; 407-ratchet bar; 408-connecting rod 2; 409-friction support block; 5-threading mechanism; 501-mounting block; 502-mounting rod (5021-docking port); 503-connecting frame (5031-sliding rod; 5032-embedded block); 504-support plate; 505-clamping block; 506-support roller; 507-connecting shaft (5071-sliding ring; 5072-connecting rod three); 508-driving plate one (5081-strong magnet); 509-driving plate two; 510-mounting cover (5101-clamping plate; 5102-block; 5103-mounting plate two); 511-semi-wire wheel two; 512-wire rope. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0041] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "in", "out", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Example

[0042] This embodiment provides a PVC power pipe with a bend for easy threading (in this embodiment, it is assumed that there are five cables to be threaded). Figure 1-Figure 2 As shown, it includes a bent power tube 1, an inlet end support mechanism 2, an outlet end support mechanism 3, a bending support mechanism 4 and a threading mechanism 5; the inlet end support mechanism 2 and the outlet end support mechanism 3 are respectively arranged at the inlet end and the outlet end of the bent power tube 1.

[0043] like Figure 3As shown, five limit strips 101 extending in the axial direction are evenly distributed along the circumference on the inner side wall of the bent power tube 1 .

[0044] like Figure 4-Figure 9 As shown, the inlet end support mechanism 2 includes an inlet support plate 201, a mounting plate 202, a half-line wheel 203 and a limit control rod 204; the inlet support plate 201 is circular, and a notch is provided on the edge corresponding to the limit strip 101, and can be slidably installed in the bent power tube 1 by correspondingly embedding on the limit strip 101; a plurality of support tubes 2011 are evenly distributed along the circumference of the inlet support plate 201, and the number of support tubes 2011 is set according to the actual number of cables; the inlet end of the support tube 2011 is fixedly installed on the inlet support plate 201 and is perpendicular to the inlet support plate 201. When the inlet support plate 201 is installed at the inlet end of the bent power tube 1, the axis of the support tube 2011 is parallel to the axis of the inlet end of the bent power tube 1; three limit support rods 2012 parallel to the axis of the support tube 2011 are fixedly installed on the outlet end of each support tube 2011; A half-line wheel support frame is fixedly provided at the center of the imported support plate 201; a pair of half-line wheels 203 are provided, each half-line wheel 203 is provided with an embedded connection block and an embedded groove, and the two half-line wheels 203 are centrally symmetrical, and each embedded connection block can be correspondingly embedded in the embedded groove on the other half-line wheel 203, so that the two half-line wheels 203 are combined into a complete line wheel; each half-line wheel 203 corresponds to a mounting plate 202, and the two mounting plates 202 slide and are elastically mounted on the half-line wheel support frame through compression springs; the sliding directions of the two mounting plates 202 are collinear and opposite; A connecting limit frame is fixedly installed on one side of each support tube 2011 close to the axis of the bent power tube 1; five limit control rods 204 are evenly distributed along the circumference of the half-line wheel support frame, and the five limit control rods 204 are respectively slidably installed on the five connecting limit frames; the limit control rods 204 are parallel to the axis of the inlet end of the bent power tube 1, and each limit control rod 204 is slidably installed on the half-line wheel support frame, and is elastically connected to the half-line wheel support frame through a compression spring.

[0045] like Figure 9-Figure 15 , Figure 20-24 and Figure 31-Figure 33 As shown, the threading mechanism 5 includes a mounting block 501, a mounting rod 502, a connecting frame 503, a supporting plate 504, a clamping block 505, a supporting roller 506, a connecting shaft 507, a driving plate 1 508, a driving plate 2 509, a mounting cover 510, a half-wire wheel 2 511 and a wire rope 512; each supporting tube 2011 corresponds to a mounting rod 502, a connecting frame 503, a supporting plate 504 and a clamping block 505; Five mounting rods 502 are evenly distributed on the mounting block 501 along the circumference, and each mounting rod 502 extends in a radial shape and is rotatably mounted on the mounting block 501, and the mounting rod 502 is elastically connected to the mounting block 501 through a coil spring; a connecting frame 503 is nested and slidably mounted inside each mounting rod 502, and the bottom end of the connecting frame 503 is elastically connected to the mounting rod 502 through a tension spring; a docking port 5021 is provided on the mounting rod 502, and an embedded block 5032 is slidably mounted at the bottom end of the connecting frame 503 and elastically mounted through a compression spring, and when the embedded block 5032 is docked with the docking port 5021, the tension spring at the bottom end of the connecting frame 503 is stretched, and after the embedded block 5032 extends into the docking port 5021, the mounting rod 502 and the connecting frame 503 can be relatively fixed; One end of the connecting shaft 507 is fixedly connected to the mounting block 501, and the other end is fixedly connected to the driving plate 1 508, and the connecting shaft 507 can coincide with the axis of the bent power tube 1; a sliding ring 5071 is coaxially slidably installed on the connecting shaft 507, and the sliding ring 5071 and the mounting block 501 are elastically connected by a tension spring; a connecting rod 3 5072 is provided between the sliding ring 5071 and each supporting plate 504; one end of the connecting rod 3 5072 is rotatably installed on the sliding ring 5071, and the other end is connected to the corresponding supporting plate 504 Rotational connection; both sides of the support plate 504 are fixed with limiting sleeves; the limiting sleeves are elastically connected to the connecting frame 503 through a compression spring (when the embedded block 5032 is docked with the docking port 5021, the compression spring is compressed); two sliding rods 5031 are fixedly provided at the top of each connecting frame 503 corresponding to the limiting sleeves, the sliding rods 5031 are slidably installed in the corresponding limiting sleeves, and the top of the sliding rods 5031 is fixedly connected to the clamping block 505; each clamping block 505 is rotatably installed with two supporting rollers 506; Each support plate 504 is provided with three support grooves corresponding to the limit support rod 2012. When the limit support rod 2012 is inserted into the corresponding support groove, the support plate 504 is supported by the limit support rod 2012, the embedding block 5032 is docked with the docking port 5021, and the limit control rod 204 is docked with the embedding block 5032; The driving plate 1 508 is circular, and five insertion rods are evenly distributed and fixedly installed along the circumference thereof, and a strong magnet 5081 is fixedly installed on each insertion rod; the driving plate 2 509 is annular, and five insertion holes corresponding to the insertion rods are evenly distributed along the circumference thereof, and the driving plate 2 509 is made of magnetic material; when the insertion rods are inserted into the corresponding insertion holes, the driving plate 2 509 is attracted by the strong magnet 5081, and the driving plate 2 509 and the driving plate 1 508 are relatively fixed; Five groups of clamping blocks 5102 are evenly distributed along the circumference on the inner side surface of the installation cover 510, and each group includes four clamping blocks 5102 distributed along a rectangle; three clamping plates 5101 are evenly distributed along the circumference on the edge of the installation cover 510, and each clamping plate 5101 is elastically connected to the installation cover 510 in the radial direction through a compression spring, so as to better clamp the outlet end of the bent power tube 1, so that the installation cover 510 covers the outlet end of the bent power tube 1; A half-line wheel 2 support frame is fixedly provided at the center of the installation cover 510, and a pair of half-line wheels 2 511 are provided. Two half-line wheels 2 511 slide on the half-line wheel 2 support frame and two mounting plates 2 5103 are elastically mounted through compression springs. The sliding directions of the two mounting plates 2 5103 are collinear and opposite; the half-line wheels 2 511 are rotatably mounted on the corresponding mounting plates 2 5103; the half-line wheels 2 511 have the same structure as the half-line wheels 1 203, and the two half-line wheels 2 511 can be assembled into a complete line wheel; The steel wire rope 512 is connected end to end, with one end sleeved on a reel formed by two half-reel twos 511, and the other end sleeved on a reel formed by two half-reel ones 203; the connecting shaft 507 is fixedly mounted on one of the steel wire ropes 512 connected end to end, and the other passes through the connecting shaft 507; when the steel wire rope 512 is sleeved on the reel formed by two half-reel twos 511 and the reel formed by two half-reel ones 203, pulling the steel wire rope 512 can drive the connecting shaft 507 to move between the reel formed by two half-reel twos 511 and the reel formed by two half-reel ones 203.

[0046] like Figure 25-Figure 30 As shown, the outlet end support mechanism 3 includes an outlet support plate 301 and a wire splitter 302; the outlet support plate 301 is circular, and a notch is provided on the edge corresponding to the limit strip 101, and can be slidably installed in the bent power tube 1 by correspondingly embedding on the limit strip 101; the wire splitter 302 is provided with five pieces corresponding to the cable, and each wire splitter 302 is provided with an outlet for the cable to pass through; the outlet support plate 301 is provided with five installation grooves corresponding to the wire splitter 302, and the wire splitter 302 is installed in the installation groove by embedding; The wire splitter 302 is provided with four card slots 3021 (corresponding to the four card blocks 5102 of the same group on the mounting cover 510), which are used to install the wire splitter 302 on the mounting cover 510; each card slot 3021 includes an entry portion and a fitting portion that are connected to each other, and the entry portion and the fitting portion are L-shaped as a whole, the entry portion is connected to the outside, and the fitting portion is located inside the wire splitter 302; a fixed block 3022 is slidably mounted on the fitting portion of each card slot 3021, and the fixed block 3022 is elastically connected to the wire splitter 302 through a compression spring (when the compression spring is relaxed, the fixed block 3022 will extend out of the wire splitter 302); an insertion slot is provided on the fixed block 3022 corresponding to the card block 5102, and a slope is provided at the bottom end of the entry side of the insertion slot; like Fig.24 As shown, the card block 5102 is T-shaped as a whole, including an insertion block and a blocking block; when the wire splitter 302 is installed on the installation cover 510, the card block 5102 of the installation cover 510 can be inserted into the card slot 3021 from the entry portion, and then the wire splitter 302 is radially slid along the installation cover 510, and the insertion block of the card block 5102 gradually enters the fitting portion, and the insertion block moves along the inclined surface on the fixed block 3022, so that the fixed block 3022 moves toward the inside of the wire splitter 302, and the compression spring on the fixed block 3022 is compressed, and finally the insertion block enters the insertion slot of the fixed block 3022, and the blocking block contacts the fixed block 3022, and the fixed block 3022 is fixed in the wire splitter 302, and the wire splitter 302 is fixed on the installation cover 510; A fixing hole 3011 is provided on the side of the installation groove of the outlet support plate 301 corresponding to the fixing block 3022; when the insertion block of the clamping block 5102 is disengaged from the insertion groove of the fixing block 3022, the restoring action of the compression spring will drive the fixing block 3022 to extend out of the wire splitting piece 302. At this time, the wire splitting piece 302 is installed into the corresponding installation groove, and the fixing block 3022 will enter the corresponding fixing hole 3011 driven by the compression spring, so that the wire splitting piece 302 is fixed on the outlet support plate 301.

[0047] like Figure 15-Figure 20 and Figure 31-Figure 32 As shown, the support mechanism 4 at the bending part includes a support frame 1 401, a support frame 2 402 and a support assembly; the support frame 1 401 and the support frame 2 402 are both circular, and a notch is provided on the edge corresponding to the limit strip 101, and can be slidably installed in the bent power tube 1 by correspondingly embedding on the limit strip 101; the support frame 1 401 is installed at the inlet end of the bent power tube 1, and the support frame 2 402 is installed at the outlet end of the bent power tube 1; five groups of support assemblies are evenly installed on the support frame 1 401 and the support frame 2 402 along the circumference; the support frame 1 401 is provided with a through port 1 4011, and the support frame 2 402 is provided with a through port 2 4021; each group of support assemblies includes a linkage rod 403, a transmission rod 404, a connecting rod 1 405, a ratchet block 406, a ratchet bar 407, a connecting rod 2 408 and a friction support block 409; The linkage rod 403 is arranged radially along the support frame 1 401 or the support frame 2 402, and a linkage block 1 is fixedly installed on the inner end thereof, and a linkage block 2 is fixedly installed on the outer end thereof. Both the linkage block 1 and the linkage block 2 are radially slidably installed on the corresponding support frame 1 401 or the support frame 2 402; the linkage block 1 is elastically connected to the corresponding support frame 1 401 or the support frame 2 402 through a compression spring; an inclined surface is provided on the linkage block 2; one end of the transmission rod 404 is rotatably installed on the corresponding support frame 1 401 or the support frame 2 402, and the other end is placed on the inclined surface of the linkage block 2; one end of the connecting rod 1 405 is rotatably installed on the transmission rod 404 and placed on the linkage On the end side of the inclined surface of the moving block 2, the other end is rotatably connected with the ratchet block 406; the ratchet block 406 is radially slidably mounted on the corresponding support frame 1 401 or the support frame 2 402; there are two ratchet bars 407, both of which are engaged with the ratchet block 406; the ratchet bar 407 is elastically connected to the corresponding support frame 1 401 or the support frame 2 402 through a compression spring to ensure that it is always engaged with the ratchet block 406; one end of the connecting rod 2 408 is rotatably mounted on the ratchet block 406, and the other end is rotatably mounted on the friction support block 409; the friction support block 409 is rotatably mounted at the edge of the corresponding support frame 1 401 or the support frame 2 402; Five limit blocks 4022 are evenly distributed along the circumference at the center of the support frame 402; the limit blocks 4022 are rotatably installed on the support frame 402 and are elastically connected to the support frame 402 through a coil spring; a snap-in groove is provided on the edge of the drive plate 509 corresponding to the limit blocks 4022, so that the drive plate 509 can be fixed on the limit blocks 4022.

[0048] The installation steps and working principle of this embodiment are as follows: 1. Install the inlet end support mechanism 2, the outlet end support mechanism 3, the bending support mechanism 4 and the threading mechanism 5 into the bent power tube 1; The first step is to install the support frame 1 401 into the inlet end of the bent power tube 1; install the drive plate 2 509 on the limit block 4022 of the support frame 2 402, and install the support frame 2 402 into the outlet end of the bent power tube 1; The second step is to move the support plate 504 so that the limit support rod 2012 is inserted into the corresponding support groove, and the embedded block 5032 is inserted into the docking port 5021 under the action of the compression spring. At this time, the inlet support plate 201 and the five support plates 504 are relatively fixed, the mounting rod 502 and the corresponding connecting frame 503 are relatively fixed, and the limit control rod 204 is aligned with the embedded block 5032; The third step is to put the steel wire rope 512 into the bent power tube 1 from the inlet end, so that one end of the steel wire rope 512 passes through the support frame 1 401 and the driving plate 2 509 in sequence and moves to the outlet end of the bent power tube 1, move the mounting plate 1 202 and set the other end of the steel wire rope 512 on the reel formed by the two half reels 1 203; then install the inlet support plate 201 into the inlet end of the bent power tube 1, and then install the mounting block 501, the mounting rod 502, the connecting frame 503, the supporting plate 504, the clamping block 505, the supporting roller 506, the connecting shaft 507 and the driving plate 1 508 into the inlet end of the bent power tube 1; In the fourth step, the five wire splitters 302 are installed one by one on the installation cover 510; the outlet support plate 301 is installed into the outlet end of the bent power tube 1, and the wire rope 512 is passed through the outlet support plate 301; the wire splitters 302 on the installation cover 510 are aligned with the installation groove on the outlet support plate 301, and the installation cover 510 is moved to install the wire splitters 302 into the installation groove, and the installation cover 510 is covered on the outlet end of the bent power tube 1; finally, the installation plate 2 5103 is moved and the wire rope 512 is sleeved on the wire wheel formed by combining two half wire wheels 2 511.

[0049] 2. Carry out cable threading; The first step is to insert the cable strips into the support tube 2011; after the cable head passes through the support plate 504, press the limit control rod 204, the limit control rod 204 pushes the embedding block 5032, the embedding block 5032 is separated from the docking port 5021 and moves into the connecting frame 503, the connecting frame 503 moves into the installation rod 502 under the action of the spring, and the clamping block 505 moves with the sliding rod 5031 and clamps the cable on the support plate 504; The second step is to pull the steel wire rope 512 to drive the connecting shaft 507 to move along the bent power tube 1; the driving plate 1 508 pushes the linkage block 1 of the linkage rod 406 in the supporting frame 1 401 to push the entire supporting frame 1 401 to move in the bent power tube 1 (in this process, the sliding ring 5071 and the connecting rod 3 5072 will support the supporting plate 504), and the cable moves accordingly, and the supporting plate 504 is separated from the limiting supporting rod 2012; after the supporting frame 1 401 moves to the bending part of the bent power tube 1, it can no longer move, and the driving plate 1 508 continues to move and passes through the linkage block 1 on the supporting frame 1 401; The movable block 1 moves radially outward, the inclined surface on the linkage block 2 drives the transmission rod 404 to rotate, the transmission rod 404 drives the connecting rod 1 405 to move, the connecting rod 1 405 makes the ratchet block 406 move outward along the ratchet bar 407, the connecting rod 2 408 moves with the ratchet block 406 and drives the friction support block 409 to rotate, the friction support block 409 contacts the inner wall of the bent power tube 1, due to the unidirectional movement of the ratchet block 406 and the ratchet bar 407, the friction support block 409 will not rotate back to the original state, so that the entire support frame 1 401 is fixed at the bending position of the bent power tube 1; When the driving plate 1 508 passes through the linkage block 1 of the support frame 1 401, the mounting block 501, the mounting rod 502, the connecting frame 503, the supporting plate 504, the clamping block 505, the supporting roller 506 and the connecting shaft 507 synchronously pass through the through-port 1 4011; when the cable is driven through the bend, due to the change in the inner diameter of the power pipe, the distance between the clamping block 505 and the pipe wall will change. If the supporting roller 506 on the clamping block 505 is pushed inward by the pipe wall, the connecting rod 3 5072 will drive the sliding ring 5071 to move on the connecting shaft 507, thereby ensuring the stability of the entire structure, and the supporting roller 506 moves along the pipe wall to reduce friction; The driving plate 1 508 continues to move to the outlet end of the bent power tube 1, and the strong magnet 5081 on the driving plate 1 508 attracts the driving plate 2 509, so that the driving plate 2 509 and the driving plate 1 508 are relatively fixed; The third step is to pull the steel wire rope 512 in the opposite direction, so that the driving plate 1 508 drives the driving plate 2 509 to move toward the inlet end (this movement requires the operator to assist in pulling the cable outward at the inlet end), and the driving plate 2 509 pushes the linkage block 1 of the linkage rod 406 in the supporting frame 2 402 to push the entire supporting frame 2 402 to move in the bent power tube 1; after the supporting frame 2 402 moves to the bending part of the bent power tube 1, it cannot move anymore, and the steel wire rope 512 is pulled again to move the driving plate 1 508 toward the outlet end, and the driving plate 508 passes through the linkage block 1 on the supporting frame 2 402, so that the entire supporting frame 2 402 is fixed at the bending part of the bent power tube 1 (the principle is the same as that of the supporting frame 1 401); When the driving plate 1 508 passes through the linkage block 1 of the supporting frame 2 402 , the mounting block 501 , the mounting rod 502 , the connecting frame 503 , the supporting plate 504 , the clamping block 505 , the supporting roller 506 and the connecting shaft 507 pass through the through opening 2 4021 synchronously; In the fourth step, continue to pull the wire rope 512, and the connecting shaft 507 moves toward the outlet end, thereby driving the mounting block 501, the mounting rod 502, the connecting frame 503, the support plate 504, the clamping block 505, the supporting roller 506, the driving plate 1 508, the driving plate 2 509 and the cable head to move to the outlet end, and the cable head enters the outlet of the distribution plate 302.

[0050] 3. Take out the threading mechanism 5; The first step is to move the mounting plate 202 and remove the wire rope 512 from the half-wire wheel 203; The second step is to remove the installation cover 510 and pull the wire rope 512 outward from the outlet end at the same time, and the installation block 501, the installation rod 502, the connecting frame 503, the support plate 504, the clamping block 505, the supporting roller 506, the driving plate 1 508, the driving plate 2 509 and the cable head are all pulled out; the cable head is taken out from between the support plate 504 and the clamping block 505; The third step is to move the wire splitter 302 radially along the installation cover 510, remove the wire splitter 302 from the installation cover 510, move the wire splitter 302 along the cable, and finally insert it into the corresponding installation groove of the outlet support plate 301, and the fixing block 3022 enters the fixing hole 3011, and the wire splitter 302 is fixed on the outlet support plate 301.

[0051] The above is to complete the threading work of the cable in the bent power pipe 1, the inlet support plate 201 remains at the inlet end, the support frame 1 401 and the support frame 2 402 remain at both ends of the bend, and the outlet support plate 301 remains at the outlet end to support the cable, avoid the cable from contacting the pipe wall, and prevent the cables from being entangled; finally, the inlet and outlet ends of the bent power pipe 1 are respectively connected to the pipes to be connected.

Claims

1. A PVC power pipe with a bend that is convenient for threading, characterized in that: It comprises a bent power tube (1), an inlet end support mechanism (2), an outlet end support mechanism (3), a bend support mechanism (4) and a threading mechanism (5); a limit strip (101) is provided on the inner side wall of the bent power tube (1); The threading mechanism (5) comprises a connecting shaft (507), a mounting block (501) and a driving plate (508) fixedly mounted on the connecting shaft (507), a mounting rod (502) rotatably and elastically mounted on the mounting block (501), a mounting frame (503) slidably and elastically mounted on the mounting rod (502), a supporting plate (504) slidably mounted on the mounting frame (503), a clamping block (505) fixedly mounted on the mounting frame (503), a driving plate (509) intermittently fixedly connected to the driving plate (508), and a mounting cover (51 0), a pair of half-wire wheels (511) and a steel wire rope (512) are mounted on the mounting cover (510) and can be freely combined; the connecting shaft (507) is fixedly mounted on the steel wire rope (512); a sliding ring (5071) elastically connected to the mounting block (501) is slidably mounted on the connecting shaft (507); a connecting rod (5072) is provided between the sliding ring (5071) and the supporting plate (504); one end of the connecting rod (5072) is rotatably mounted on the sliding ring (5071), and the other end is rotatably connected to the corresponding supporting plate (504); The inlet end support mechanism (2) comprises an inlet support plate (201) that can be installed in the bent power pipe (1) and allows the cable to pass through, and a pair of half-reel one (203) installed on the inlet support plate (201) that can be freely combined; the steel wire rope (512) is connected end to end, with one end sleeved on a reel formed by two half-reel two (511), and the other end sleeved on a reel formed by two half-reel one (203); The outlet end support mechanism (3) comprises an outlet support plate (301) which can be installed in the bent power pipe (1) and allows the cable to pass through; The bending support mechanism (4) comprises a support frame 1 (401) and a support frame 2 (402) which can be installed in the bent power pipe (1), and support components provided on both the support frame 1 (401) and the support frame 2 (402); the support frame 1 (401) is provided with a through opening 1 (4011), and the support frame 2 (402) is provided with a through opening 2 (4021); a limit block (4022) is rotatably and elastically installed on the support frame 2 (402), and the drive plate 2 (509) can be embedded in the limit block (4022).

2. A PVC power pipe with a bend for easy threading according to claim 1, characterized in that: A supporting roller (506) is rotatably mounted on the clamping block (505).

3. A PVC power pipe with a bend for easy threading according to claim 1, characterized in that: The mounting rod (502) is provided with a docking port (5021), and an embedding block (5032) is slidably and elastically mounted on the connecting frame (503) and intermittently extends into the docking port (5021); and a limit control rod (204) capable of pushing the embedding block (5032) is slidably and elastically mounted on the inlet support plate (201).

4. A PVC power pipe with a bend for easy threading according to claim 1, characterized in that: The support assembly comprises a linkage rod (403) slidably mounted in support frame one (401) or support frame two (402), a transmission rod (404) with one end placed on the linkage rod (403) and the other end rotatably mounted in support frame one (401) or support frame two (402), a ratchet block (406) slidably mounted in support frame one (401) or support frame two (402), a connecting rod one (405) with one end rotatably mounted on the transmission rod (404) and the other end rotatably mounted on the ratchet block (406), a ratchet bar (407) elastically mounted in support frame one (401) or support frame two (402) and meshing with the ratchet block (406), a friction support block (409) rotatably mounted on support frame one (401) or support frame two (402), and a connecting rod two (408) with one end rotatably mounted on the ratchet block (406) and the other end rotatably mounted on the friction support block (409).

5. The PVC power pipe with a bend for easy threading according to claim 1, characterized in that: The outlet end support mechanism (3) further comprises a line splitting piece (302) embedded and mounted on the outlet support plate (301), the line splitting piece (302) being provided with a line outlet for passing the cable through; the installation cover (510) being provided with a clamping block (5102), and the line splitting piece (302) being provided with a clamping slot (3021) corresponding to the clamping block (5102).

6. A PVC electric power pipe with a bend for easy threading according to claim 5, characterized in that: A fixing block (3022) is slidably and elastically mounted in the card slot (3021), and an insertion slot is provided on the fixing block (3022) corresponding to the card slot (5102); and a fixing hole (3011) is provided on the outlet support plate (301) corresponding to the fixing block (3022).

7. A PVC electric power pipe with a bend for easy threading according to claim 1, characterized in that: A clamping plate (5101) is elastically mounted on the mounting cover (510).

8. The PVC power pipe with a bend for easy threading according to claim 1, characterized in that: A support pipe (2011) is fixedly mounted on the inlet support plate (201).

9. A PVC electric power pipe with a bend for easy threading according to claim 8, characterized in that: A position-limiting support rod (212) is fixedly mounted on the support tube (211); and a support groove corresponding to the position-limiting support rod (2012) is provided on the support plate (504).

10. The PVC power pipe with a bend for easy threading according to claim 1, characterized in that: A strong magnet (5081) is fixedly mounted on the first driving plate (508); the second driving plate (509) is made of magnetic material.

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