Concrete delivery pipe for road construction

Abstract

The application is suitable for the technical field of building construction, and provides a concrete conveying pipeline for highway construction, which comprises a conveying pipeline body; the conveying pipeline body is uniformly provided with an ear plate on the circumferential side, and the circumferential side is rotationally provided with an inner ring plate; coaxial outer ring plates are arranged between the connecting plates; a sliding part that is in sliding cooperation with the guide rods is slidingly arranged between the two guide rods; a scraping part is slidingly arranged on the sliding part; an elastic rope is connected between the scraping part and the corresponding ear plate; a guide part that is matched with the sliding parts is rotationally arranged on the circumferential side of the outer ring plate; a gear that is in meshing cooperation with the corresponding scraping part is rotationally arranged on the side of the extension plate. Through the linkage cooperation between the components, the device realizes the scraping of the waste materials on the inner wall of the conveying pipeline body by the groups of scrapers, the end portions of the L-shaped water outlet pipes are opened, water is conveyed into the annular water storage tank through the water inlet pipe, and the inner wall of the conveying pipeline body is washed through the L-shaped water outlet pipes, so that the cleaning effect of the inner wall of the conveying pipeline body is improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a concrete conveying pipeline for highway construction. Background Technology

[0002] Concrete pump trucks, as modern transportation equipment for concrete pouring, are widely used in various construction sites. A concrete pump truck mainly consists of several parts, including a truck chassis, frame, central pumping system, and boom system. When the truck is in operation during highway construction, the concrete is transported along the delivery pipeline under the pressure of the central pumping system. The boom system, driven by hydraulic cylinders and a rotary motor, can freely extend and rotate, bringing the concrete delivery pipe to different construction positions. Then, workers hold the concrete delivery pipe at the construction position and align the end of the concrete delivery pipe with the inside of the pouring formwork to pour the concrete.

[0003] However, if concrete delivery pipelines are not cleaned in a timely manner or are not thoroughly cleaned, the concrete waste adhering to the pipeline walls will often solidify. Therefore, in order to better transport concrete, it is essential to clean and recycle the unsolidified concrete waste adhering to the pipeline walls after pouring. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a concrete conveying pipe for highway construction. This pipe is designed so that rotating the handle clockwise drives a gear to rotate, which in turn lowers the corresponding rack. A ring-shaped baffle then drives the remaining racks to descend synchronously. At this time, an elastic rope is stretched, allowing each set of scrapers to remove concrete waste adhering to the inner wall of the conveying pipe, thus improving the cleaning effect. Furthermore, the ends of each set of L-shaped water outlet pipes are opened, allowing water to be supplied to the annular water tank through the inlet pipe. This water is then used to flush the inner wall of the conveying pipe, further enhancing the cleaning effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A concrete conveying pipeline for highway construction includes a conveying pipe body; ear plates are uniformly arranged on the periphery of the conveying pipe body near its top end, and an inner ring plate is rotatably arranged on the periphery of the conveying pipe body near its bottom end; connecting plates are uniformly arranged on the periphery of the inner ring plate; an outer ring plate coaxial with the inner ring plate is arranged between each of the connecting plates; guide holes are uniformly opened on the periphery of the outer ring plate; guide rods are symmetrically arranged on both sides of the guide holes on the periphery of the outer ring plate; a sliding member that slides between the two guide rods and slides with the guide rods is slidably arranged; a scraper is slidably arranged on the sliding member; an elastic rope is connected between the scraper and the corresponding ear plate; a guide member adapted to each sliding member is rotatably arranged on the periphery of the outer ring plate; a connecting rod is fixedly connected to the surface of the connecting plate; a rotating ring coaxial with the outer ring plate is connected between the ends of each connecting rod; an extension plate is uniformly arranged on the periphery of the rotating ring; a gear that meshes with the corresponding scraper is rotatably arranged on the side of the extension plate.

[0007] The present invention is further configured such that: two sets of limiting rings are arranged sequentially from top to bottom on the peripheral side of the conveying pipe body near its bottom end; the inner ring plate is rotatably disposed between the two limiting rings; a handle is provided on the side of the gear on one of the extension plates, and a handrail is provided on its side.

[0008] The present invention is further configured such that: the sliding member includes a sliding rod slidably disposed in the guide hole; a stop block is provided at the bottom end of the guide rod; a return spring is provided between the stop block and the inner ring plate; a mounting plate is provided at the top end of the sliding rod; and sliding holes that slide and cooperate with the guide rod are symmetrically opened on the surface of the mounting plate on both sides of the guide rod.

[0009] The present invention is further configured such that: a support rod is provided on the surface of the mounting plate; a guide ball is provided at the end of the support rod; the guide member includes a drive ring coaxially disposed with the outer ring plate; and arc-shaped guide plates adapted to the guide ball are arranged in a circumferential array on the inner wall of the drive ring.

[0010] The invention is further configured such that: a fixing rod is provided on the inner wall of the drive ring between two adjacent arc-shaped guide plates; an arc-shaped slider is provided at the end of the fixing rod; an arc-shaped groove is uniformly opened on the circumferential side of the outer ring plate to slide with the corresponding arc-shaped slider; an arc-shaped spring is provided between the arc-shaped slider and the inner wall of the arc-shaped groove; and the guide ball is pressed against the arc-shaped side of the corresponding arc-shaped guide plate under the elastic force of the arc-shaped spring.

[0011] The invention is further configured such that: a guide groove is provided on the side of the mounting plate; the scraper includes a rack slidably disposed in the guide groove; each rack meshes with a corresponding gear; an L-shaped plate is provided at the end of the rack; each L-shaped plate is fixedly connected to a corresponding ear plate by an elastic rope; a lifting rod is provided on the side of the L-shaped plate; an arc-shaped plate is provided at the end of the lifting rod and coaxially disposed with the conveying pipe body; an arc-shaped scraper is provided on the side of the arc-shaped plate and adapted to the inner peripheral side of the conveying pipe body; the arc-shaped scraper and the lifting rod are located on the same side.

[0012] The present invention is further configured such that: an annular baffle is fixedly connected to the surface of one of the racks; the remaining racks are slidably positioned directly below the annular baffle; and the surface of the annular baffle is uniformly provided with avoidance holes for avoiding the elastic rope.

[0013] The present invention is further configured such that: L-shaped water outlet pipes are arranged in a circular array near the top of the inner peripheral side of the conveying pipe body; an annular water storage tank is provided on the outer peripheral side of the conveying pipe body; each of the L-shaped water outlet pipes is connected to the annular water storage tank; an inlet pipe is arranged through the peripheral side of the annular water storage tank; and the inlet pipe is connected to an external water tank through a water delivery hose.

[0014] The advantages of this invention are:

[0015] 1. This invention uses a clockwise rotating handle to drive a gear, which in turn drives the corresponding rack to descend. A ring-shaped baffle then drives the remaining racks to descend synchronously. At this time, the elastic rope is stretched, allowing each set of scrapers to remove concrete waste adhering to the inner wall of the conveying pipe, thus improving the cleaning effect. The ends of each set of L-shaped water outlet pipes are opened, allowing water to be supplied to the annular water tank through the inlet pipe. This water then rinses the inner wall of the conveying pipe through the L-shaped water outlet pipes, further improving the cleaning effect.

[0016] 2. In this invention, when the scraper descends to near the bottom of the conveying pipe body, the drive ring rotates. Under the guidance of the arc-shaped guide plate, the corresponding guide ball is squeezed, causing the sliding member to move towards the inner ring plate. At this time, the arc-shaped spring and the return spring are compressed, thereby driving each set of scraping members to move inward synchronously with the corresponding sliding member, so that the scraper disengages from the inner wall of the conveying pipe body. At the same time, the rack and gear disengage, and under the elastic return force of the elastic rope, the corresponding scraping member rises and returns to its original position. When the hand holding the drive ring is released, under the elastic return force of the arc-shaped spring and the return spring, the guide member rotates in the opposite direction and returns to its original position, so that each set of sliding members slides in the opposite direction and returns to its original position, thereby causing each set of racks to move and return to its original position and mesh with the corresponding gear, completing one cycle of cleaning action. The entire device has a simple structure, low manufacturing cost, and is easy to use. It realizes the cleaning of concrete waste adhering to the inner wall of the conveying pipe body. By setting a collection bucket at the bottom of the conveying pipe body, the concrete waste can be recycled.

[0017] 3. The present invention uses a handle to drive the rotating ring and the inner ring plate to rotate around the outer wall of the conveying pipe body, thereby driving the scrapers on each set of scraping parts to rotate on the inner wall of the conveying pipe body, increasing the scraping range and further improving the cleaning effect on the inner wall of the conveying pipe body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a concrete conveying pipeline for highway construction according to the present invention.

[0020] Figure 2 For the present invention Figure 1 Enlarged view of region A.

[0021] Figure 3 This is a structural schematic diagram of a concrete conveying pipeline for highway construction according to the present invention, viewed from the front.

[0022] Figure 4 For the present invention Figure 3 Enlarged view of region B.

[0023] Figure 5 This is a schematic diagram of the structure of the delivery pipe body of the present invention.

[0024] Figure 6 This is a schematic diagram of the sliding component of the present invention.

[0025] Figure 7 This is a schematic diagram of the scraping component of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of the annular baffle of the present invention.

[0027] Figure 9 This is a schematic diagram of the structure of the guide component of the present invention.

[0028] In the diagram: 1. Conveying pipe body; 2. Ear plate; 3. Inner ring plate; 4. Connecting plate; 5. Outer ring plate; 6. Guide hole; 7. Guide rod; 8. Sliding component; 9. Scraper; 10. Elastic rope; 11. Guide component; 12. Connecting rod; 13. Rotating ring; 14. Extension plate; 15. Gear; 16. Limiting ring; 17. Handle; 18. Handrail; 19. Stop; 20. Slide rod; 21. Return spring; 22. Mounting plate; 3. Sliding hole; 24. Support rod; 25. Guide ball; 26. Drive ring; 27. Arc-shaped guide plate; 28. Fixed rod; 29. ​​Arc-shaped slider; 30. Arc-shaped groove; 31. Arc-shaped spring; 32. Guide groove; 33. Rack; 34. L-shaped plate; 35. Lifting rod; 36. Arc-shaped plate; 37. Arc-shaped scraper; 38. Annular baffle; 39. Clearance hole; 40. L-shaped water outlet pipe; 41. Annular water storage tank; 42. Water inlet pipe. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0032] Example 1

[0033] Please see Figure 1-9 The present invention provides the following technical solutions:

[0034] A concrete conveying pipeline for highway construction, specifically comprising a conveying pipe body 1; ear plates 2 are evenly arranged on the periphery of the conveying pipe body 1 near its top end, and an inner ring plate 3 is rotatably arranged on the periphery of the conveying pipe body 1 near its bottom end; connecting plates 4 are evenly arranged on the periphery of the inner ring plate 3; an outer ring plate 5 coaxial with the inner ring plate 3 is arranged between each connecting plate 4; guide holes 6 are evenly opened on the periphery of the outer ring plate 5; guide rods 7 are symmetrically arranged on both sides of the guide holes 6 on the periphery of the outer ring plate 5; and a sliding connection is provided between the two guide rods 7. 7. A sliding component 8 with sliding fit; a scraper 9 is slidably provided on the sliding component 8; an elastic rope 10 is connected between the scraper 9 and the corresponding ear plate 2; a guide 11 adapted to each sliding component 8 is rotatably provided on the side of the outer ring plate 5; a connecting rod 12 is fixedly connected to the surface of the connecting plate 4; a rotating ring 13 coaxially provided with the outer ring plate 5 is connected between the ends of each connecting rod 12; an extension plate 14 is evenly provided on the side of the rotating ring 13; a gear 15 meshing with the corresponding scraper 9 is rotatably provided on the side of the extension plate 14.

[0035] The working principle of this embodiment is as follows: By rotating the gear 15 clockwise, the corresponding scraper 9 is driven to descend. Under the action of the annular baffle 38, the other scraper 9 are driven to descend synchronously, thus completing the scraping of concrete waste on the inner wall of the conveying pipe body 1. By rotating the guide 11, each group of sliding parts 8 is driven to slide synchronously along the corresponding guide rod 7. When each group of sliding parts 8 moves synchronously toward the inner ring plate 3, each group of scraper 9 disengages from the corresponding gear 15. Under the elastic reset force of the corresponding elastic rope 10, each group of scraper 9 is driven to rise synchronously. During this process, each group of scraper 9 is disengaged from the inner wall of the conveying pipe body 1.

[0036] Example 2

[0037] Please see Figure 1-9This second embodiment is an improvement on the first embodiment as follows: Specifically, two sets of limiting rings 16 are arranged sequentially from top to bottom on the side of the conveying pipe body 1 near its bottom end; the inner ring plate 3 is rotatably disposed between the two limiting rings 16; a handle 17 is provided on the side of the gear 15 on an extension plate 14, and a handrail 18 is provided on its side; the sliding member 8 includes a sliding rod 20 slidably disposed in the guide hole 6; a stop block 19 is provided at the bottom end of the guide rod 7; a return spring 21 is provided between the stop block 19 and the inner ring plate 3; and an installation rod is provided at the top end of the sliding rod 20. Plate 22; The surface of the mounting plate 22 is symmetrically provided with sliding holes 23 on both sides of the guide rod 7, which slide in conjunction with the guide rod 7; a support rod 24 is provided on the surface of the mounting plate 22; a guide ball 25 is provided at the end of the support rod 24; the guide component 11 includes a drive ring 26 coaxially arranged with the outer ring plate 5; the inner wall of the drive ring 26 is provided with arc-shaped guide plates 27 arranged in a circumferential array to match the guide balls 25; a fixing rod 28 is provided on the inner wall of the drive ring 26 between two adjacent arc-shaped guide plates 27; an arc-shaped slider 29 is provided at the end of the fixing rod 28; outer The annular plate 5 has evenly spaced arc-shaped grooves 30 that slide with the corresponding arc-shaped sliders 29. An arc-shaped spring 31 is installed between the arc-shaped sliders 29 and the inner wall of the arc-shaped grooves 30. Under the elastic force of the arc-shaped springs 31, the guide ball 25 is pressed against the arc-shaped side of the corresponding arc-shaped guide plate 27. The mounting plate 22 has guide grooves 32 on its side. The scraper 9 includes racks 33 slidably disposed in the guide grooves 32. Each rack 33 meshes with a corresponding gear 15. An L-shaped plate 34 is provided at the end of each rack 33. Each L-shaped plate 34 meshes with a corresponding gear 15. Ear plate 2 is fixedly connected by elastic rope 10; a lifting rod 35 is provided on the side of L-shaped plate 34; an arc plate 36 is provided at the end of the lifting rod 35 and is coaxially arranged with the conveying pipe body 1; an arc scraper 37 adapted to the inner circumferential side of the conveying pipe body 1 is provided on the side of the arc plate 36; the arc scraper 37 and the lifting rod 35 are located on the same side; an annular baffle 38 is fixedly connected to the surface of a rack 33; the remaining racks 33 are all slidably placed directly below the annular baffle 38; the surface of the annular baffle 38 is evenly provided with avoidance holes 39 for avoiding the elastic rope 10.

[0038] The working principle of this embodiment 2 is as follows: By rotating the handle 17 clockwise, the corresponding gear 15 rotates, thereby causing the corresponding rack 33 to descend. The annular baffle 38 drives the other racks 33 to descend synchronously. At this time, the elastic rope 10 is stretched, enabling each set of arc-shaped scrapers 37 to scrape off the concrete waste adhering to the inner wall of the conveying pipe body 1, improving the cleaning effect on the inner wall of the conveying pipe body 1. When the arc-shaped scraper 37 descends to near the bottom of the conveying pipe body 1, the drive ring 26 is rotated. Under the guidance of the arc-shaped guide plate 27, the corresponding guide ball 25 is squeezed, causing the sliding member 8 to move towards the inner ring plate 3. At this time, the arc spring 31 and the return spring 21 are compressed, thereby causing each set of scraping members 9 to move synchronously with the corresponding sliding member 8. Moving inward causes the arc-shaped scraper 37 to disengage from the inner wall of the conveying pipe body 1. Simultaneously, the rack 33 disengages from the gear 15 and, under the elastic restoring force of the elastic rope 10, drives the corresponding scraping component 9 to rise and reset. Releasing the hand holding the drive ring 26, under the elastic restoring force of the arc-shaped spring 31 and the reset spring 21, drives the guide component 11 to rotate in the opposite direction and reset, causing each set of sliding components 8 to slide in the opposite direction and reset. This allows each set of racks 33 to move and reset and mesh with the corresponding gear 15, completing one cycle of cleaning action. The entire device has a simple structure, low manufacturing cost, and is easy to use. It achieves the cleaning of concrete waste adhering to the inner wall of the conveying pipe body 1. By setting a collection bucket at the bottom of the conveying pipe body 1, the concrete waste can be recycled.

[0039] Example 3

[0040] Please see Figure 1-9 This embodiment three is an improvement on embodiment two. Specifically, L-shaped water outlet pipes 40 are arranged in a circular array on the inner circumferential side of the conveying pipe body 1 near its top; an annular water storage tank 41 is arranged on the outer circumferential side of the conveying pipe body 1; each L-shaped water outlet pipe 40 is connected to the annular water storage tank 41; an inlet pipe 42 is arranged through the circumferential side of the annular water storage tank 41; the inlet pipe 42 is connected to the external water tank through a water delivery hose.

[0041] The working principle of this embodiment 3 is as follows: During the process of scraping the concrete waste inside the conveying pipe body 1 by the descent of each set of scraping parts 9, the ends of each set of L-shaped water outlet pipes 40 are opened, and water is transported into the annular water storage tank 41 through the water inlet pipe 42. Water is then used to flush the inner wall of the conveying pipe body 1 through each set of L-shaped water outlet pipes 40, further improving the cleaning effect on the inner wall of the conveying pipe body 1. When each set of scraping parts 9 rises to directly below and contacts the L-shaped water outlet pipe 40, the hand holding the drive ring 26 is released. Under the elastic reset force of the arc spring 31 and the reset spring 21, the guide part 11 is driven to rotate in the opposite direction and reset, so that each set of sliding parts 8 slides in the opposite direction and resets. This causes each set of racks 33 to move and reset and mesh with the corresponding gear 15. The corresponding gear 15 is fixed on the corresponding extension plate 14 by the fastening bolts, so that each set of scraping parts 9 is stably set at the bottom of the corresponding L-shaped water outlet pipe 40, preventing concrete from entering the interior of the L-shaped water outlet pipe 40 during the concrete pouring process, and also preventing the falling concrete from causing the scraping parts 9 to descend.

[0042] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A concrete delivery pipe for highway construction, comprising a delivery pipe body (1); characterized in that: the delivery pipe body (1) is uniformly provided with an ear plate (2) near its top end on the peripheral side, and is rotationally provided with an inner ring plate (3) near its bottom end on the peripheral side; the inner ring plate (3) is uniformly provided with a connecting plate (4) on the peripheral side; the connecting plates (4) are provided with an outer ring plate (5) coaxial with the inner ring plate (3) between them; the outer ring plate (5) is uniformly provided with a guide hole (6) on the peripheral side; the outer ring plate (5) is symmetrically provided with a guide rod (7) on the peripheral side on both sides of the guide hole (6); the guide rods (7) are slidingly provided with a sliding piece (8) slidingly matched with the guide rods (7) between them; the sliding piece (8) is slidingly provided with a scraping piece (9) thereon; the scraping piece (9) is connected with an elastic rope (10) between it and the corresponding ear plate (2); the outer ring plate (5) is rotationally provided with a guide piece (11) matched with each sliding piece (8) on the peripheral side; the connecting plate (4) is fixedly connected with a connecting rod (12) on the surface; the connecting rods (12) are connected with a rotating ring (13) coaxially arranged with the outer ring plate (5) between the end portions; the rotating ring (13) is uniformly provided with an extension plate (14) on the peripheral side; the extension plate (14) is rotationally provided with a gear (15) meshingly matched with the corresponding scraping piece (9) on the side surface; the sliding piece (8) comprises a sliding rod (20) slidingly arranged in the guide hole (6); the sliding rod (20) is provided with a mounting plate (22) on the top end; the mounting plate (22) is provided with a guide groove (32) on the side surface; the scraping piece (9) comprises a rack (33) slidingly arranged in the guide groove (32); each rack (33) is meshingly matched with the corresponding gear (15); the rack (33) is provided with an L-shaped plate (34) on the end portion; each L-shaped plate (34) is fixedly connected with the corresponding ear plate (2) through the elastic rope (10); the L-shaped plate (34) is provided with a lifting rod (35) on the side surface; the lifting rod (35) is provided with an arc-shaped plate (36) coaxially arranged with the delivery pipe body (1) on the end portion; the arc-shaped plate (36) is provided with an arc-shaped scraper (37) matched with the inner peripheral side of the delivery pipe body (1) on the side surface; the arc-shaped scraper (37) and the lifting rod (35) are located on the same side; one rack (33) is fixedly connected with an annular baffle (38) on the surface; the remaining racks (33) are slidingly arranged directly below the annular baffle (38); the annular baffle (38) is uniformly provided with an avoiding hole (39) on the surface for avoiding the elastic rope (10); the inner peripheral side of the delivery pipe body (1) is provided with an L-shaped water outlet pipe (40) penetratingly arranged in a circumferential array near the top end; the outer peripheral side of the delivery pipe body (1) is provided with an annular water storage tank (41); each L-shaped water outlet pipe (40) is in communication with the annular water storage tank (41); the annular water storage tank (41) is provided with a water inlet pipe (42) penetratingly arranged on the peripheral side; the water inlet pipe (42) is connected with an external water tank through a water delivery hose. ​ ​ ​ ​ ​ ​ ​ 2. A concrete delivery pipe for road construction according to claim 1, characterized in that: The conveying pipe body (1) is provided with two groups of limiting rings (16) successively from top to bottom near the bottom end of the side surface; the inner ring plate (3) is rotationally arranged between the two limiting rings (16); the gear (15) on the extension plate (14) is provided with a handle (17) on the side surface, and a handrail (18) is arranged on the side surface.

3. A concrete delivery pipe for road construction according to claim 1, characterized in that: The bottom end of the guide rod (7) is provided with a stop block (19); the stop block (19) and the inner ring plate (3) are provided with a reset spring (21) therebetween; the surface of the mounting plate (22) is symmetrically provided with a sliding hole (23) on both sides of the guide rod (7) for sliding cooperation with the guide rod (7).

4. A concrete delivery pipe for road construction according to claim 3, characterized in that: The surface of the mounting plate (22) is provided with a support rod (24); the end of the support rod (24) is provided with a guide ball (25). The guide piece (11) comprises a driving ring (26) coaxially arranged with the outer ring plate (5); the inner wall of the driving ring (26) is circumferentially arranged with arc-shaped guide plates (27) matched with the guide ball (25).

5. A concrete delivery pipe for road construction according to claim 4, characterized in that: The inner wall of the driving ring (26) is provided with a fixed rod (28) between the adjacent two arc-shaped guide plates (27); the end of the fixed rod (28) is provided with an arc-shaped sliding block (29); the circumferential surface of the outer ring plate (5) is uniformly provided with arc-shaped grooves (30) for sliding cooperation with the corresponding arc-shaped sliding blocks (29); the arc-shaped sliding blocks (29) and the inner walls of the arc-shaped grooves (30) are provided with arc-shaped springs (31); under the elastic force of the arc-shaped springs (31), the guide ball (25) is tightly pressed against the arc-shaped side surface of the corresponding arc-shaped guide plate (27).

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