A PVC power pipe with a bend that is convenient for threading wires

Abstract

A PVC power conduit with a bend that facilitates cable threading includes a bendable power conduit, an inlet support mechanism and an outlet support mechanism respectively disposed at the inlet and outlet ends of the bendable power conduit, a bend support mechanism supported at the bend of the bendable power conduit, and a threading mechanism; a limiting strip is provided on the inner wall of the bendable power conduit; the threading mechanism is moved by a steel wire rope; the inlet support mechanism includes an inlet support plate that can be installed inside the bendable power conduit; the outlet support mechanism includes an outlet support plate that can be installed inside the bendable power conduit; the bend support mechanism includes a first support frame and a second support frame that can be installed inside the bendable power conduit, and support components are provided on both the first support frame and the second support frame; this invention can easily and efficiently complete the threading of multiple cables, and support the cables to prevent them from contacting the conduit wall and to prevent them from getting tangled; after threading, the threading mechanism can be removed from the bendable power conduit and reused.

Description

Technical Field

[0001] This invention relates to the field of power pipe technology, and in particular to a PVC power pipe with bends that facilitate wire threading. Background Technology

[0002] In modern power infrastructure construction, PVC power pipes are widely used due to their excellent insulation, corrosion resistance, and cost-effectiveness. However, in practical use, the problem of threading wires through bends in traditional PVC power pipes has gradually become apparent.

[0003] With the acceleration of urbanization and the continuous growth of electricity demand, the laying of power lines is becoming increasingly complex. In many cases, cables need to be threaded through PVC power conduits with a certain bending angle. However, existing ordinary PVC power conduits typically have the following shortcomings at bends: First, the change in inner diameter at the bend may increase the resistance to cable pulling, and when there are many cables, jamming can easily occur at the bend, affecting the construction progress. Second, when the cable passes through the bend of the power conduit, its surface may rub against the inner wall of the conduit, making the cable easily scratched, thereby reducing the cable's service life and safety. Furthermore, when constructing in narrow spaces or complex terrain, the difficulty of threading cables at bends often requires a lot of manpower and time for adjustments and operations, increasing construction costs and difficulty.

[0004] In conclusion, in order to meet the requirements of efficient, safe and convenient construction in modern power engineering, it is urgent to develop a type of PVC power conduit that facilitates wire threading at bends. Summary of the Invention

[0005] To address the above problems, this invention proposes a PVC power conduit with easily accessible bends for wiring. The technical solution used is as follows:

[0006] A PVC power pipe with a bend that facilitates wire threading includes a bendable power pipe, an inlet end support mechanism, an outlet end support mechanism, a bend support mechanism, and a wire threading mechanism; a limiting strip is provided on the inner wall of the bendable power pipe;

[0007] The threading mechanism includes a connecting shaft, a mounting block and a drive plate one 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 support plate slidably mounted on the mounting frame, a clamping block fixedly mounted on the mounting frame, a drive plate two intermittently fixedly connected to the drive plate one, a mounting cover, a pair of half-thread pulleys two that can be freely combined and mounted on the mounting cover, 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 three is provided between the sliding ring and the support plate, one end of the connecting rod three is rotatably mounted on the sliding ring, and the other end is rotatably connected to the corresponding support plate;

[0008] The inlet end support mechanism includes an inlet support plate that can be installed inside a bent power conduit and allow the cable to pass through, and a pair of half-spools that can be freely combined and installed on the inlet support plate; the wire rope is connected end to end, with one end sleeved on a spool formed by two half-spools and the other end sleeved on a spool formed by two half-spools.

[0009] The outlet support mechanism includes an outlet support plate that can be installed inside a bent power conduit and allows the cable to pass through.

[0010] The bending support mechanism includes a support frame one and a support frame two that can be installed inside the bent power pipe, and a support component provided on both support frame one and support frame two; support frame one is provided with a through port one, and support frame two is provided with a through port two; a limit block is rotatably and elastically installed on support frame two, and drive plate two can be embedded in the limit block.

[0011] Furthermore, a support roller is rotatably mounted on the clamping block.

[0012] Furthermore, the mounting rod is provided with a mating interface, and the connecting frame is slidably and elastically mounted with an intermittently inserted embedding block; the inlet support plate is slidably and elastically mounted with a limit control rod capable of pushing the embedding block.

[0013] 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 rotatably installed on the transmission rod and the other end rotatably installed on the ratchet block, a ratchet rack 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 rotatably installed on the ratchet block and the other end rotatably installed on the friction support block.

[0014] Furthermore, the outlet support mechanism also includes a splitter plate embedded in the outlet support plate, the splitter plate having an outlet for the cable to pass through; the mounting cover has a locking block, and the splitter plate has a corresponding locking groove.

[0015] Furthermore, a fixing block is slidably and elastically installed in the card slot, and the fixing block has an insertion slot corresponding to the card block; the outlet support plate has a fixing hole corresponding to the fixing block.

[0016] Furthermore, a clamping plate is elastically mounted on the mounting cover.

[0017] Furthermore, a support tube is fixedly installed on the imported support plate.

[0018] Furthermore, a limiting support rod is fixedly installed on the support tube; the support plate is provided with a support groove corresponding to the limiting support rod.

[0019] Furthermore, a strong magnet is fixedly installed on the first drive plate; the second drive plate is made of magnetic material.

[0020] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0021] This invention, through the coordinated design of the inlet support mechanism, outlet support mechanism, bend support mechanism, and threading mechanism, can easily and efficiently complete the threading of multiple cables. After threading, the threading mechanism can be removed from the bent power pipe and reused. The inlet support plate remains at the inlet end, support frame one and support frame two remain at both ends of the bend, and the outlet support plate remains at the outlet end to support the cable, prevent the cable from contacting the pipe wall, and prevent the cable from getting tangled together. Attached Figure Description

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the present invention after the bent power pipe has been removed.

[0024] Figure 3 This is a schematic cross-sectional view of the AA section of the bent power pipe of the present invention.

[0025] Figure 4 This is a schematic diagram of the assembly structure of the inlet end support mechanism, the bending point support mechanism, and the threading mechanism of the present invention.

[0026] Figures 5-6 This is a schematic diagram of the structure of the inlet end support mechanism of the present invention.

[0027] Figure 7-Figure 8 This is a partial structural schematic diagram of the inlet end support mechanism of the present invention.

[0028] Figure 9 This is a schematic diagram of the assembly structure of the inlet end support mechanism and the threading mechanism of the present invention.

[0029] Figure 10-11 and Figures 13-14 This is a partial structural schematic diagram of the threading mechanism of the present invention.

[0030] Figure 12 This is an exploded structural diagram of the mounting rod and connecting frame in the threading mechanism of the present invention.

[0031] Figure 15This is a schematic diagram of the assembly structure of the drive plate and the support mechanism at the bend of the present invention.

[0032] Figures 16-19 This is a partial structural schematic diagram of the support mechanism at the bend of the present invention.

[0033] Figures 20-22 This is a schematic diagram of the assembly structure of the outlet end support mechanism, the bending point support mechanism, and the threading mechanism of the present invention.

[0034] Figure 23 This is a schematic diagram of the mounting cover in the threading mechanism of the present invention.

[0035] Figure 24 For the present invention Figure 23 A magnified schematic diagram of the structure at point B in the middle.

[0036] Figure 25 This is a schematic diagram of the splitter plate in the outlet end support mechanism of the present invention.

[0037] Figure 26 For the present invention Figure 25 A magnified schematic diagram of the structure at point C.

[0038] Figure 27 This is a schematic diagram of the structure of the fixing block in the dividing plate of the present invention.

[0039] Figure 28 This is a schematic diagram of the assembly structure of the dividing plate and the mounting cover of the present invention.

[0040] Figure 29 This is a schematic diagram of the structure of the outlet end support mechanism of the present invention.

[0041] Figure 30 This is a schematic diagram of the structure of the outlet support plate in the outlet end support mechanism of the present invention.

[0042] Figure 31 This is a schematic diagram of the assembly structure of the drive plate 2 and the support mechanism at the bend in this invention.

[0043] Figure 32 This is a schematic diagram of the assembly structure of the second driving plate and the limiting block of the present invention.

[0044] Figure 33 This is a schematic diagram of the assembly structure of mounting plate two and half-thread wheel two of the present invention.

[0045] Icon labels:

[0046] 1-Bending power conduit; 101-Limit strip;

[0047] 2-Import support mechanism; 201-Import support plate (2011-Support tube; 2012-Limit support rod); 202-Mounting plate one; 203-Half-line wheel one; 204-Limit control rod;

[0048] 3-Exit end support mechanism; 301-Exit support plate (3011-Fixing hole); 302-Divider plate (3021-Slot; 3022-Fixing block);

[0049] 4-Bend support mechanism; 401-Support frame one (4011-Opening one); 402-Support frame two (4021-Opening two; 4022-Limiting block); 403-Linkage rod; 404-Transmission rod; 405-Connecting rod one; 406-Ratchet block; 407-Ratchet rack; 408-Connecting rod two; 409-Friction support block;

[0050] 5-Threading mechanism; 501-Mounting block; 502-Mounting rod (5021-Matching interface); 503-Connecting frame (5031-Sliding rod; 5032-Embedding block); 504-Support plate; 505-Clamping block; 506-Supporting roller; 507-Connecting shaft (5071-Sliding ring; 5072-Connecting rod three); 508-Drive plate one (5081-Strong magnet); 509-Drive plate two; 510-Mounting cover (5101-Clamping plate; 5102-Clamping block; 5103-Mounting plate two); 511-Half-thread wheel two; 512-Wire rope. Detailed Implementation

[0051] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] In the description of this invention, it should be noted that the terms "upper", "lower", "in", "out", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example

[0053] This embodiment provides a PVC power conduit with bends that facilitate cable threading (this embodiment assumes five cables need to be threaded). Figures 1-2As shown, it includes a bent power pipe 1, an inlet support mechanism 2, an outlet support mechanism 3, a bend support mechanism 4, and a threading mechanism 5; the inlet support mechanism 2 and the outlet support mechanism 3 are respectively located at the inlet and outlet ends of the bent power pipe 1.

[0054] like Figure 3 As shown, five axially extending limiting strips 101 are evenly distributed along the circumference on the inner wall of the bent power pipe 1.

[0055] like Figures 4-9 As shown, the inlet support mechanism 2 includes an inlet support plate 201, a mounting plate 202, a half-coil wheel 203, and a limit control rod 204. The inlet support plate 201 is circular, and its edge has a notch corresponding to the limit strip 101, allowing it to be slidably installed inside the bent power pipe 1 by being embedded in the limit strip 101. Several support pipes 2011 are evenly distributed along the circumference of the inlet support plate 201, and the number of support pipes 2011 is set according to the actual number of cables. The inlet end of the support pipe 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 pipe 1, the axis of the support pipe 2011 is parallel to the axis of the inlet end of the bent power pipe 1. Three limit support rods 2012 parallel to the axis of the support pipe 2011 are fixedly installed on the outlet end of each support pipe 2011.

[0056] A half-roller support frame is fixedly installed at the center of the imported support plate 201; a pair of half-rollers 203 are provided, each half-roller 203 is provided with an embedded connecting block and an embedded groove, the two half-rollers 203 are centrally symmetrical, each embedded connecting block can be correspondingly embedded into the embedded groove on the other half-roller 203, so that the two half-rollers 203 are combined to form a complete spool; each half-roller 203 corresponds to a mounting plate 202, the two mounting plates 202 slide and are elastically mounted on the half-roller support frame by compression springs; the sliding directions of the two mounting plates 202 are collinear and opposite;

[0057] Each support tube 2011 is fixedly installed with a connecting limit frame on the side near the axis of the bent power tube 1; five limit control rods 204 are evenly distributed along the circumference of the half-roller support frame, and the five limit control rods 204 are slidably installed on the five connecting limit frames respectively; 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 through the half-roller support frame and is elastically connected to the half-roller support frame through a compression spring.

[0058] like Figures 9-15 , Figures 20-24 and Figures 31-33As shown, the threading mechanism 5 includes a mounting block 501, a mounting rod 502, a connecting frame 503, a support plate 504, a clamping block 505, a support roller 506, a connecting shaft 507, a first drive plate 508, a second drive plate 509, a mounting cover 510, a second half-thread wheel 511, and a wire rope 512; each support tube 2011 corresponds to one mounting rod 502, one connecting frame 503, one support plate 504, and one clamping block 505;

[0059] Five mounting rods 502 are evenly distributed around the circumference of the mounting block 501. Each mounting rod 502 extends radially and is rotatably mounted on the mounting block 501. The mounting rods 502 are elastically connected to the mounting block 501 via coil springs. A connecting frame 503 is nested and slidably mounted inside each mounting rod 502. The bottom end of the connecting frame 503 is elastically connected to the mounting rod 502 via a tension spring. The mounting rod 502 is provided with a mating interface 5021. An insert block 5032 is slidably mounted on the bottom end of the connecting frame 503 via a compression spring. When the insert block 5032 mates with the mating interface 5021, the tension spring at the bottom end of the connecting frame 503 is stretched. After the insert block 5032 extends into the mating interface 5021, the mounting rod 502 and the connecting frame 503 can be relatively fixed.

[0060] One end of the connecting shaft 507 is fixedly connected to the mounting block 501, and the other end is fixedly connected to the drive plate 508. The connecting shaft 507 can coincide with the axis of the bent power pipe 1. A sliding ring 5071 is coaxially slidably mounted on the connecting shaft 507, and the sliding ring 5071 is elastically connected to the mounting block 501 by a tension spring. A connecting rod 5072 is provided between the sliding ring 5071 and each support plate 504. One end of the connecting rod 5072 is rotatably mounted on the sliding ring 5071, and the other end is connected to the corresponding support plate 504. Rotary connection; limiting sleeves are fixedly provided on both sides of the support plate 504; the limiting sleeves are elastically connected to the connecting frame 503 by compression springs (when the embedded block 5032 is docked with the interface 5021, the compression spring is compressed); each connecting frame 503 has two sliding rods 5031 fixedly provided at the top of the corresponding limiting sleeve, the sliding rods 5031 are slidably installed in the corresponding limiting sleeve, 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 support rollers 506;

[0061] Each tray 504 is provided with three support grooves corresponding to the limiting support rod 2012. When the limiting support rod 2012 is inserted into the corresponding support groove, the tray 504 is supported by the limiting support rod 2012. The embedded block 5032 is connected to the interface 5021, and the limiting control rod 204 is connected to the embedded block 5032.

[0062] The first drive plate 508 is circular, with five insertion rods evenly distributed and fixedly installed along its circumference, and each insertion rod is fixedly installed with a strong magnet 5081; the second drive plate 509 is annular, with five insertion holes evenly distributed along its circumference corresponding to the insertion rods, and the second drive plate 509 is made of magnetic material; when the insertion rod is inserted into the corresponding insertion hole, the second drive plate 509 is attracted by the strong magnet 5081, and the second drive plate 509 and the first drive plate 508 are fixed relative to each other.

[0063] Five sets of locking blocks 5102 are evenly distributed along the circumference of the inner side of the mounting cover 510. Each set includes four locking blocks 5102 distributed along a rectangle. Three clamping plates 5101 are evenly distributed along the circumference of the edge of the mounting cover 510. Each clamping plate 5101 is elastically connected to the mounting cover 510 in the radial direction by a compression spring, which makes it easier to clamp the outlet end of the bent power pipe 1 and make the mounting cover 510 cover the outlet end of the bent power pipe 1.

[0064] A support frame for the second half-roller is fixed at the center of the mounting cover 510. A pair of second half-rollers 511 are provided. Two mounting plates 5103 are elastically mounted on the support frame corresponding to the two second half-rollers 511 and through compression springs. The sliding directions of the two mounting plates 5103 are collinear and opposite. The second half-roller 511 is rotatably mounted on the corresponding mounting plate 5103. The second half-roller 511 has the same structure as the first half-roller 203. The two second half-rollers 511 can be combined to form a complete spool.

[0065] The wire rope 512 is connected end to end, with one end sleeved on a reel made up of two half-reels 511 and the other end sleeved on a reel made up of two half-reels 203. The connecting shaft 507 is fixedly installed on one of the wire ropes 512 connected end to end, and the other wire rope passes through the connecting shaft 507. When the wire rope 512 is sleeved on the reel made up of two half-reels 511 and the reel made up of two half-reels 203, pulling the wire rope 512 will drive the connecting shaft 507 to move between the reel made up of two half-reels 511 and the reel made up of two half-reels 203.

[0066] like Figures 25-30 As shown, the outlet support mechanism 3 includes an outlet support plate 301 and a branch plate 302. The outlet support plate 301 is circular and has a notch on its edge corresponding to the limiting strip 101, allowing it to be slidably installed inside the bent power pipe 1 by being embedded in the limiting strip 101. The branch plate 302 has five pieces corresponding to the cable, and each branch plate 302 has an outlet for the cable to pass through. The outlet support plate 301 has five mounting slots corresponding to the branch plates 302, and the branch plates 302 are installed in the mounting slots by being embedded.

[0067] The splitter 302 has four slots 3021 (corresponding to the four locking blocks 5102 in the same group on the mounting cover 510) for mounting the splitter 302 on the mounting cover 510; each slot 3021 includes an entry part and a fitting part that are interconnected, the entry part and the fitting part are L-shaped as a whole, the entry part is connected to the outside, and the fitting part is located inside the splitter 302; a fixing block 3022 is slidably mounted on the fitting part of each slot 3021, and the fixing block 3022 is elastically connected to the splitter 302 through a compression spring (when the compression spring is released, the fixing block 3022 will extend out of the splitter 302); the fixing block 3022 has an insertion groove corresponding to the locking block 5102, and the bottom end of the entry side of the insertion groove has a bevel;

[0068] like Figure 24 As shown, the locking block 5102 is T-shaped and includes an insertion block and a blocking block. When the splitter piece 302 is installed on the mounting cover 510, the locking block 5102 of the mounting cover 510 can be inserted into the locking groove 3021 from the entry part. Then, the splitter piece 302 slides radially along the mounting cover 510, and the insertion block of the locking block 5102 gradually enters the fitting part. The insertion block moves along the inclined surface on the fixing block 3022, causing the fixing block 3022 to move into the splitter piece 302. The compression spring on the fixing block 3022 is compressed, and finally the insertion block enters the insertion groove of the fixing block 3022. The blocking block contacts the fixing block 3022, and the fixing block 3022 is fixed in the splitter piece 302. The splitter piece 302 is fixed on the mounting cover 510.

[0069] The mounting groove of the outlet support plate 301 has a fixing hole 3011 corresponding to the fixing block 3022. When the insertion block of the locking block 5102 is disengaged from the insertion groove of the fixing block 3022, the reset action of the compression spring will drive the fixing block 3022 to extend out of the wire divider 302. At this time, the wire divider 302 is inserted into the corresponding mounting groove, and the fixing block 3022 will enter the corresponding fixing hole 3011 under the action of the compression spring, so that the wire divider 302 is fixed on the outlet support plate 301.

[0070] like Figures 15-20 and Figures 31-32As shown, the bending support mechanism 4 includes a support frame 1 401, a support frame 2 402, and support components. Both support frame 1 401 and support frame 2 402 are circular, and their edges have notches corresponding to the limiting strip 101, allowing them to be slidably installed inside the bent power pipe 1 by being embedded in the limiting strip 101. Support frame 1 401 is installed at the inlet end of the bent power pipe 1, and support frame 2 402 is installed at the outlet end of the bent power pipe 1. Five sets of support components are evenly distributed around the circumference of both support frame 1 401 and support frame 2 402. Support frame 1 401 has a through-hole 4011, and support frame 2 402 has a through-hole 4021. Each set of support components includes a linkage rod 403, a transmission rod 404, a connecting rod 1 405, a ratchet block 406, a ratchet rack 407, a connecting rod 2 408, and a friction support block 409.

[0071] Linkage rod 403 is radially arranged along support frame 1 401 or support frame 2 402. Linkage block 1 is fixedly installed at its inner end, and linkage block 2 is fixedly installed at its outer end. Both linkage block 1 and linkage block 2 are radially slidably installed on their respective support frames 1 401 or 2 402. Linkage block 1 is elastically connected to its respective support frame 1 401 or 2 402 via a compression spring. Linkage block 2 has an inclined surface. One end of transmission rod 404 is rotatably installed on its respective support frame 1 401 or 2 402, and the other end rests on the inclined surface of linkage block 2. One end of connecting rod 405 is rotatably installed on the transmission rod 404 resting on the inclined surface of linkage block 2. The second movable block is on the inclined side of one end, and the other end is rotatably connected to the ratchet block 406; the ratchet block 406 is radially slidably mounted on the corresponding support frame 401 or support frame 402; there are two ratchet racks 407, both of which mesh with the ratchet block 406; the ratchet rack 407 is elastically connected to the corresponding support frame 401 or support frame 402 through a compression spring to ensure that it is always meshed with the ratchet block 406; one end of the connecting rod 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 401 or support frame 402.

[0072] Five limiting blocks 4022 are evenly distributed around the center of the support frame 2 402. The limiting blocks 4022 are rotatably mounted on the support frame 2 402 and are elastically connected to the support frame 2 402 through coil springs. The edge of the drive plate 2 509 is provided with a snap-fit ​​groove corresponding to the limiting blocks 4022, so that the drive plate 2 509 can be fixed on the limiting blocks 4022.

[0073] The installation steps and working principle of this embodiment are as follows:

[0074] 1. Install the inlet support mechanism 2, the outlet support mechanism 3, the bend support mechanism 4, and the threading mechanism 5 into the bent power pipe 1;

[0075] First, install support frame 1 401 into the inlet end of the bent power pipe 1; install drive plate 2 509 on the limiting block 4022 of support frame 2 402, and install support frame 2 402 into the outlet end of the bent power pipe 1.

[0076] The second step is to move the pallet 504 so that the limiting support rod 2012 is inserted into the corresponding support groove, and the embedded block 5032 is inserted into the interface 5021 under the action of the compression spring. At this time, the inlet support plate 201 and the five pallets 504 are relatively fixed, the mounting rod 502 and the corresponding connecting frame 503 are relatively fixed, and the limiting control rod 204 is aligned with the embedded block 5032.

[0077] The third step involves inserting the wire rope 512 into the bent power pipe 1 from the inlet end, so that one end of the wire rope 512 passes through the support frame 401 and the drive plate 509 in sequence and moves to the outlet end of the bent power pipe 1. The mounting plate 202 is then moved and the other end of the wire rope 512 is fitted onto the reel formed by the two half-reels 203. Subsequently, the inlet support plate 201 is installed into the inlet end of the bent power pipe 1, and the mounting block 501, mounting rod 502, connecting frame 503, support plate 504, clamping block 505, support roller 506, connecting shaft 507 and drive plate 508 then enter the inlet end of the bent power pipe 1.

[0078] Fourth step: Install the five branch plates 302 one by one on the mounting cover 510; insert the outlet support plate 301 into the outlet end of the bent power pipe 1, and let the wire rope 512 pass through the outlet support plate 301; then align the branch plates 302 on the mounting cover 510 with the mounting groove on the outlet support plate 301, move the mounting cover 510 so that the branch plates 302 are inserted into the mounting groove, and the mounting cover 510 covers the outlet end of the bent power pipe 1; finally, move the mounting plate 5103 and put the wire rope 512 on the reel formed by the two half reels 511.

[0079] 2. Perform cable threading;

[0080] First, insert the cable into the support tube 2011 in strips; after the cable head passes through the tray 504, press the limit control rod 204. The limit control rod 204 pushes the embedding block 5032, the embedding block 5032 disengages from the interface 5021 and moves into the connecting frame 503. The connecting frame 503 moves into the mounting rod 502 under the action of the spring. The clamping block 505 moves with the sliding rod 5031 and clamps the cable on the tray 504.

[0081] The second step involves pulling the steel wire rope 512, causing the connecting shaft 507 to move along the bent power pipe 1. The drive plate 508 pushes the linkage block 1 of the linkage rod 406 within the support frame 401, thereby moving the entire support frame 401 within the bent power pipe 1 (during this process, the sliding ring 5071 and the connecting rod 5072 will support the support plate 504). The cable moves accordingly, and the support plate 504 disengages from the limiting support rod 2012. After the support frame 401 reaches the bend of the bent power pipe 1 and can no longer move, the drive plate 508 continues to move and passes through the linkage block 1 on the support frame 401. The moving block 1 moves radially outward, and 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 causes the ratchet block 406 to move outward along the ratchet rack 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 pipe 1. Due to the unidirectional movement of the ratchet block 406 and the ratchet rack 407, the friction support block 409 will not rotate back to its original state, thereby fixing the entire support frame 1 401 at the bend of the bent power pipe 1.

[0082] When the drive plate 508 passes through the linkage block 1 of the support frame 401, the mounting block 501, mounting rod 502, connecting frame 503, support plate 504, clamping block 505, support roller 506 and connecting shaft 507 simultaneously pass through the through opening 4011; when driving the cable 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 support roller 506 on the clamping block 505 is pushed inward by the pipe wall, the connecting rod 5072 will drive the sliding ring 5071 to move on the connecting shaft 507, thereby ensuring the stability of the entire structure. The support roller 506 moves along the pipe wall to reduce friction.

[0083] As the drive plate 508 continues to move to the outlet end of the bent power tube 1, the strong magnet 5081 on the drive plate 508 attracts the drive plate 509, making the drive plate 509 and the drive plate 508 relatively fixed.

[0084] Third, pull the steel wire rope 512 in the reverse direction, causing the drive plate 1 508 to move the drive plate 2 509 towards the inlet end (this movement requires the operator to assist in pulling the cable outward at the inlet end). The drive plate 2 509 pushes the linkage block 1 of the linkage rod 406 inside the support frame 2 402, thereby moving the entire support frame 2 402 inside the bent power pipe 1. After the support frame 2 402 moves to the bend of the bent power pipe 1 and can no longer move, pull the steel wire rope 512 again, causing the drive plate 1 508 to move towards the outlet end. The drive plate 508 passes through the linkage block 1 on the support frame 2 402, so that the entire support frame 2 402 is fixed at the bend of the bent power pipe 1 (the principle is the same as that of the support frame 1 401).

[0085] When the drive plate 508 passes through the linkage block 1 of the support frame 402, the mounting block 501, mounting rod 502, connecting frame 503, support plate 504, clamping block 505, support roller 506 and connecting shaft 507 simultaneously pass through the through port 4021.

[0086] Fourth step, continue to pull the wire rope 512, and the connecting shaft 507 moves towards the outlet end, thereby driving the mounting block 501, mounting rod 502, connecting frame 503, support plate 504, clamping block 505, support roller 506, drive plate one 508, drive plate two 509 and cable head to move to the outlet end, and the cable head enters the outlet of the splitter plate 302.

[0087] III. Remove threading mechanism 5;

[0088] First, move the mounting plate 202 to remove the wire rope 512 from the half-spool 203;

[0089] The second step is to remove the mounting cover 510 and simultaneously pull the wire rope 512 outward from the outlet end. The mounting block 501, mounting rod 502, connecting frame 503, support plate 504, clamping block 505, support roller 506, drive plate one 508, drive plate two 509, and cable head are all pulled out. The cable head is then removed from between the support plate 504 and the clamping block 505.

[0090] The third step involves moving the splitter 302 radially along the mounting cover 510, removing the splitter 302 from the mounting cover 510, moving the splitter 302 along the cable, and finally inserting it into the corresponding mounting groove of the outlet support plate 301. The fixing block 3022 enters the fixing hole 3011, and the splitter 302 is fixed on the outlet support plate 301.

[0091] The above completes the cable threading process in the bent power conduit 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, prevent the cable from contacting the conduit wall, and prevent the cable from getting tangled. Finally, the inlet and outlet ends of the bent power conduit 1 are connected to the pipes that need to be connected.

Claims

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

2. The PVC power conduit with convenient wire threading at the bend as described in claim 1, characterized in that, A support roller (506) is rotatably mounted on the clamping block (505).

3. The PVC power conduit with easy wire threading at the bend as described in claim 1, characterized in that, The mounting rod (502) is provided with a mating interface (5021), and the mounting bracket (503) is slidably and elastically mounted with an intermittently inserted inserting block (5032) into the mating interface (5021); the inlet support plate (201) is slidably and elastically mounted with a limit control rod (204) capable of pushing the inserting block (5032).

4. The PVC power conduit with convenient wire threading at the bend as described in claim 1, characterized in that, The support assembly includes a linkage rod (403) slidably mounted in a support frame one (401) or a support frame two (402), a transmission rod (404) with one end placed on the linkage rod (403) and the other end rotatably mounted in the support frame one (401) or the support frame two (402), a ratchet block (406) slidably mounted in the support frame one (401) or the support frame two (402), a connecting rod one (405) rotatably mounted on the transmission rod (404) and the other end rotatably mounted on the ratchet block (406), a ratchet rack (407) elastically mounted in the support frame one (401) or the support frame two (402) and meshing with the ratchet block (406), a friction support block (409) rotatably mounted on the support frame one (401) or the support frame two (402), and a connecting rod two (408) rotatably mounted on the ratchet block (406) and the other end rotatably mounted on the friction support block (409).

5. The PVC power conduit with convenient wire threading at the bend as described in claim 1, characterized in that, The outlet support mechanism (3) further includes a splitter plate (302) embedded in the outlet support plate (301), the splitter plate (302) having an outlet for the cable to pass through; the mounting cover (510) having a locking block (5102), and the splitter plate (302) having a corresponding locking slot (3021).

6. The PVC power conduit with convenient wire threading at the bend as described in claim 5, characterized in that, A fixing block (3022) is slidably and elastically installed in the slot (3021), and an insertion slot is provided on the fixing block (3022) corresponding to the slot (5102); a fixing hole (3011) is provided on the outlet support plate (301) corresponding to the fixing block (3022).

7. The PVC power conduit with convenient wire threading at the bend as described in claim 1, characterized in that, A clamping plate (5101) is elastically mounted on the mounting cover (510).

8. The PVC power conduit with convenient wire threading at the bend as described in claim 1, characterized in that, A support pipe (2011) is fixedly installed on the imported support plate (201).

9. A PVC power conduit with a bend that facilitates wire threading, as described in claim 8, is characterized in that... A limiting support rod (2012) is fixedly installed on the support tube (2011); a support groove corresponding to the limiting support rod (2012) is provided on the tray (504).

10. A PVC power conduit with a bend that facilitates wire threading, as described in claim 1, characterized in that, A strong magnet (5081) is fixedly installed on the first drive plate (508); the second drive plate (509) is made of magnetic material.

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