A concrete delivery tube
By setting spiral triangular deceleration ribs and a rapid positioning structure on the inner wall of the concrete delivery pipe, the problems of poor deceleration effect and low pipeline alignment efficiency in large vertical drop construction are solved, and stable concrete delivery and efficient connection are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 湖北广盛混凝土有限公司
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-09
AI Technical Summary
Existing concrete delivery pipes have limited deceleration effect in large vertical drop construction, and the pipe alignment efficiency is low, which leads to high-speed concrete falling, causing aggregate separation and impact, affecting the pouring quality and safety.
Design a concrete conveying pipe with spiraling downward-extending triangular deceleration ribs on the inner wall, combined with a quick positioning structure and an upward-sloping unblocking pipe to achieve concrete swirling deceleration and rapid connection.
By using spiral deceleration bars to guide the concrete swirling and slow down, the flow velocity is reduced, aggregate segregation is decreased, conveying efficiency and connection stability are improved, pipeline connections are simplified, and the risk of blockage is reduced.
Smart Images
Figure CN224339679U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete conveying, and in particular to a concrete conveying pipe. Background Technology
[0002] In the structural pouring of vertical structures such as ventilation shafts in long tunnels, concrete must overcome a huge vertical drop to be pumped from the ground to the bottom of the shaft. Conventional concrete pumping pipes cannot effectively suppress the acceleration phenomenon caused by the increase in the drop, which leads to problems such as aggregate segregation and violent impact caused by the high-speed fall of concrete, seriously threatening the quality of concrete pouring and construction safety. Given that the construction conditions of pumping concrete with large vertical drop are relatively rare, there is currently a lack of effective measures to solve such problems. Therefore, combining the flow characteristics of pumped concrete and the key points of pumping pipe layout, the development of a new type of concrete conveying pipe with built-in deceleration ribs has significant engineering value.
[0003] Existing technology includes a concrete delivery pipe with deceleration ribs, such as Chinese Patent Application No. CN202420746327.2. This utility model discloses a novel concrete delivery pipe with deceleration ribs, comprising a concrete pump truck, which is set on the ground and connected to a vertical transport steel pipe via a pumping connection pipe. The vertical transport steel pipe is fixed to the side wall of a vertical structure by side wall fixing clips, and its lower end is connected to a concrete pouring operation pipe. The vertical transport steel pipe has a multi-segment spliced structure, and several deceleration ribs are provided on the inner wall of the vertical transport steel pipe. This utility model increases the friction between the pumped concrete fluid and the pipe by welding continuously arranged steel bars on the inner wall of the steel pipe, thereby increasing the friction between the pumped concrete fluid and the pipe through the concave and convex surfaces formed by the steel bars. Compared with conventional concrete delivery pipes, it can effectively slow down the descent speed of the pumped concrete fluid in the pipe, thereby effectively avoiding the problem of aggregate segregation under large drop height conditions and effectively eliminating the safety hazards caused by the rapid impact of the pumped concrete fluid. It is especially suitable for concrete pouring construction with large vertical drop.
[0004] However, the concrete conveying pipes similar to those in the above patents have the following problems: the deceleration ribs are axially arranged on the inner wall of the conveying pipe, which has a limited effect on slowing down the concrete flow rate, and the alignment of the pipes by using grooves is inefficient.
[0005] Therefore, it is necessary to design a concrete delivery pipe to address the construction conditions of pumping concrete with large vertical drop, as well as the technical problems existing in the installation of deceleration bars and pipelines in the current technology. Utility Model Content
[0006] To address the limited effectiveness of deceleration ribs and the inconvenience of pipe alignment in existing technologies, this utility model proposes a concrete conveying pipe, the technical solution of which is as follows:
[0007] A concrete conveying pipe includes a conveying pipe body, a first connecting flange disposed at the top end of the conveying pipe body, and a second connecting flange disposed at the bottom end of the conveying pipe body, wherein the first connecting flange and the second connecting flange cooperate to connect the two conveying pipe bodies.
[0008] The inner wall of the conveying pipe body is provided with deceleration ribs. The deceleration ribs extend spirally downward with the axis of the conveying pipe body as the axis, extending from the top end of the conveying pipe body to the bottom end of the conveying pipe body along the axis of the conveying pipe body, guiding the concrete to swirl and decelerate.
[0009] The first connecting flange and the second connecting flange are provided with a quick positioning structure. The quick positioning structure includes a protrusion on the bottom end face of the first connecting flange and several recesses on the top of the second connecting flange. Several fixing through holes are opened on the first connecting flange and the second connecting flange. When the protrusion is aligned with the recess, the fixing through holes are automatically aligned. The first connecting flange and the second connecting flange are fixed by bolts and nuts.
[0010] Furthermore, the deceleration rib is integrally formed with the conveying pipe body, and the cross-section of the deceleration rib in the vertical direction is triangular.
[0011] Furthermore, the angle formed between the upper inclined surface of the deceleration rib in the vertical direction and the pipe wall is an obtuse angle.
[0012] Furthermore, a dredging pipe is provided on the outer periphery of the conveying pipe body. The dredging pipe connects to the inside of the conveying pipe body and can be connected to a high-pressure water gun for convenient and quick dredging of the inside of the conveying pipe body. The dredging pipe is equipped with a detachable plug, which seals the interface when the high-pressure water gun is not needed.
[0013] Furthermore, the unblocking pipe is a tubular body protruding outward from the conveying pipe body, and the axis of the unblocking pipe is inclined upward relative to the axis of the conveying pipe body. The axial length of the unblocking pipe is greater than the length of the detachable plug, and the end of the detachable plug away from the conveying pipe body is provided with an external thread, while the end of the unblocking pipe away from the axis of the conveying pipe is provided with an internal thread. The external thread and the internal thread cooperate to fix the detachable plug.
[0014] Furthermore, the end of the conveying pipe body near the second connecting flange extends axially to form a connecting section, and the inner diameter of the first connecting flange is larger than the diameter of the conveying pipe body so that the connecting section can be coaxially inserted into the first connecting flange.
[0015] Furthermore, the end of the connecting section near the other conveying pipe body is provided with an inclined surface, and the inner wall of the first connecting flange is provided with a matching surface that matches the inclined surface.
[0016] Furthermore, the protrusion is a downwardly convex hemisphere, and the depression is a depression that matches the hemispherical protrusion.
[0017] The beneficial effects of this utility model are as follows: A spirally extending triangular section deceleration rib is set on the inner wall of the conveying pipe to guide the concrete swirling and decelerate it; its obtuse angled slope design reduces material accumulation. Rapid positioning is achieved through the hemispherical protrusion of the first connecting flange and the matching recess of the second connecting flange, automatically aligning the fixed through holes. The inclined surface and mating surface structure of the connecting section ensure a sealed connection. Simultaneously, an upwardly inclined unblocking pipe is provided on the outer side of the conveying pipe body, sealed by a threaded detachable bolt, facilitating connection to a high-pressure water gun for unblocking. This comprehensively improves the deceleration effect, pipe connection efficiency, and maintenance convenience. Attached Figure Description
[0018] Figure 1 This is the first axial cross-sectional view of the present invention.
[0019] Figure 2 This is the second axial cross-sectional view of the present invention.
[0020] Figure 3 This is an axial cross-sectional view of the deceleration rib of this utility model.
[0021] In the above figures: 1. Conveying pipe body; 2. First connecting flange; 3. Second connecting flange; 4. Deceleration rib; 5. Protrusion; 6. Recess; 7. Fixed through hole; 8. Unblocking pipe; 9. Removable bolt; 10. Connecting section; 11. Inclined surface; 12. Matching surface. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] like Figure 1 , Figure 2 , Figure 3 As shown, a concrete conveying pipe includes a conveying pipe body 1, a first connecting flange 2 disposed at the top end of the conveying pipe body 1, and a second connecting flange 3 disposed at the bottom end of the conveying pipe body 1. The first connecting flange 2 and the second connecting flange 3 cooperate to connect two conveying pipe bodies 1; a standardized connection interface is provided to facilitate the rapid assembly and disassembly of multiple conveying pipes. The flange design ensures a stable connection, reduces the risk of leakage during concrete conveying, and simplifies the modular expansion of the pipeline system.
[0024] like Figure 1 , Figure 2 , Figure 3As shown, the inner wall of the conveying pipe body 1 is provided with deceleration ribs 4. The deceleration ribs 4 extend spirally downward around the axis of the conveying pipe body 1, extending from the top end to the bottom end of the conveying pipe body 1 along the axial direction, guiding the concrete swirling flow and decelerating it. The spiral structure guides the concrete to form a swirling flow, reducing the flow velocity and minimizing the separation of concrete materials, such as the separation of aggregates and slurry, and reducing the risk of blockage. The swirling effect can also evenly distribute the concrete and improve conveying efficiency.
[0025] like Figure 1 , Figure 2 , Figure 3 As shown, the first connecting flange 2 and the second connecting flange 3 are provided with quick-positioning structures. These structures include a protrusion 5 on the bottom end face of the first connecting flange 2 and several recesses 6 on the top of the second connecting flange 3. Several fixing through holes 7 are also provided on the first connecting flange 2 and the second connecting flange 3. When the protrusion 5 aligns with the recesses 6, the fixing through holes 7 automatically align, and the first connecting flange 2 and the second connecting flange 3 are then fixed using bolts and nuts. The cooperation between the protrusion 5 and the recesses 6 achieves quick alignment, ensures automatic alignment of the fixing through holes 7, simplifies the bolt installation process, improves connection efficiency, and prevents leakage or loosening caused by misalignment.
[0026] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the deceleration rib 4 is integrally formed with the conveying pipe body 1, and the cross-section of the deceleration rib 4 in the vertical direction is triangular. Preferably, the angle formed between the upper inclined surface of the deceleration rib 4 in the vertical direction and the pipe wall is an obtuse angle. Integral molding enhances the overall structural strength and durability, reducing weaknesses in welding or assembly; the triangular cross-section optimizes fluid dynamics, reduces flow resistance, and prevents concrete accumulation at the ribs, thereby extending the pipe's lifespan. The obtuse angle design allows concrete to flow more smoothly over the surface of the deceleration rib 4, reducing turbulence and localized wear; simultaneously, it reduces obstruction to concrete flow, prevents blockages caused by excessive flow velocity, and improves conveying smoothness.
[0027] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, a clearing pipe 8 is provided on the outer periphery of the conveying pipe body 1. The clearing pipe 8 connects to the interior of the conveying pipe body 1 and can be connected to a high-pressure water gun for convenient and quick clearing of the interior of the conveying pipe body 1. The clearing pipe 8 is equipped with a detachable plug 9, which seals the interface when the high-pressure water gun is not needed. This provides a convenient maintenance channel, allowing for quick connection of a high-pressure water gun for clearing when blocked, reducing downtime; the detachable plug 9 design ensures daily sealing, preventing concrete leakage or foreign object entry.
[0028] like Figure 1, Figure 2 , Figure 3 As shown, preferably, the unblocking pipe 8 is a tubular body protruding outward from the conveying pipe body 1, and the axis of the unblocking pipe 8 is inclined upward relative to the axis of the conveying pipe body 1. The axial length of the unblocking pipe 8 is greater than the length of the detachable plug 9. One end of the detachable plug 9 protrudes from the outer opening of the unblocking pipe 8 and is provided with a hexagonal head for easy disassembly. The end of the detachable plug 9 away from the conveying pipe body 1 is provided with an external thread, and the end of the unblocking pipe 8 away from the axis of the conveying pipe is provided with an internal thread. The external and internal threads cooperate to fix the detachable plug 9. The outward protrusion and upward inclination facilitate the operator to connect the high-pressure water gun and use gravity to prevent water or impurities from flowing back; the length greater than the plug ensures that the plug is completely sealed, and the threaded fixation (external thread plug and internal threaded pipe) provides reliable sealing and easy disassembly, reducing maintenance difficulty.
[0029] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, a section of the conveying pipe body 1 extends axially from one end near the second connecting flange 3 to form a connecting section 10. The inner diameter of the first connecting flange 2 is larger than the diameter of the conveying pipe body 1, so that the connecting section 10 can be coaxially inserted into the first connecting flange 2. The extension section design allows the connecting section 10 of one conveying pipe to be directly inserted into the first flange of another conveying pipe, ensuring coaxial alignment and simplifying the connection process; the inner diameter of the first flange is larger than the pipe diameter, providing an insertion gap and reducing assembly resistance.
[0030] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the end of the connecting section 10 near the other conveying pipe body 1 is provided with an inclined surface 11, and the inner wall of the first connecting flange 2 is provided with a mating surface 12 that matches the inclined surface 11. The cooperation of the inclined surface 11 and the mating surface 12 forms a self-sealing structure to prevent concrete leakage at the connection; at the same time, it enhances the mechanical connection strength, resists vibration and pressure during the conveying process, and improves the overall reliability.
[0031] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the protrusion 5 is a downwardly protruding hemispherical shape, and the recess 6 is a recess 6 that matches the hemispherical protrusion 5. The hemispherical design provides a precise positioning point, ensuring a tight fit between the protrusion 5 and the recess 6, enhancing connection stability; at the same time, it reduces frictional damage during alignment and facilitates repeated use in harsh construction site environments.
[0032] The usage method and principle of this utility model are as follows: During installation, the connecting section 10 of one conveying pipe is inserted into the first connecting flange 2 of another conveying pipe. The quick positioning structure of the protrusion 5 and the recess 6 automatically aligns and fixes the through hole 7, and then it is tightened with bolts and nuts. When conveying concrete, the spiral deceleration ribs 4 on the inner wall guide the concrete to form a swirling flow, thereby slowing down the flow. If a blockage occurs, the detachable plug 9 of the unblocking pipe 8 is opened, and a high-pressure water gun is connected for quick unblocking. Its principle is based on fluid optimization and structural simplification: the deceleration ribs 4 generate a swirling effect through a spiral design, reducing the concrete flow rate and reducing material separation to prevent blockage; the quick positioning structure uses the protrusion 5, recess 6, and bolts for fixing, achieving an efficient and stable connection; the unblocking pipe 8 provides an external access point, combined with an inclined and threaded sealing design, which facilitates maintenance; the insertion and mating surface 12 of the connecting section 10 ensures sealing and durability. Overall, this design improves the efficiency, reliability, and maintainability of concrete conveying, and is suitable for high-frequency use scenarios such as construction sites.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A concrete conveying pipe, characterized in that: It includes a conveying pipe body (1), a first connecting flange (2) provided at the top of the conveying pipe body (1), and a second connecting flange (3) provided at the bottom of the conveying pipe body (1). The first connecting flange (2) and the second connecting flange (3) cooperate to connect the two conveying pipe bodies (1). The inner wall of the conveying pipe body (1) is provided with a deceleration rib (4). The deceleration rib (4) extends spirally downward with the axis of the conveying pipe body (1) as the axis, and extends from the top of the conveying pipe body (1) to the bottom of the conveying pipe body (1) along the axis of the conveying pipe body (1) to guide the concrete to swirl and decelerate. The first connecting flange (2) and the second connecting flange (3) are provided with a quick positioning structure. The quick positioning structure includes a protrusion (5) provided on the bottom end face of the first connecting flange (2) and a plurality of recesses (6) provided on the top of the second connecting flange (3). A plurality of fixing through holes (7) are provided on the first connecting flange (2) and the second connecting flange (3). When the protrusion (5) is aligned with the recess (6), the fixing through holes (7) are automatically aligned and the first connecting flange (2) and the second connecting flange (3) are fixed by bolts and nuts.
2. The concrete conveying pipe according to claim 1, characterized in that: The deceleration rib (4) is integrally formed with the conveying pipe body (1), and the cross section of the deceleration rib (4) in the vertical direction is triangular.
3. The concrete conveying pipe according to claim 2, characterized in that: The angle between the upper inclined surface of the deceleration rib (4) in the vertical direction and the pipe wall is an obtuse angle.
4. The concrete conveying pipe according to claim 1, characterized in that: The outer periphery of the conveying pipe body (1) is provided with a dredging pipe (8), which connects to the inside of the conveying pipe body (1). The dredging pipe (8) can be connected to a high-pressure water gun for convenient and quick dredging of the inside of the conveying pipe body (1). The dredging pipe (8) is equipped with a detachable plug (9), which seals the interface when the high-pressure water gun is not needed.
5. The concrete conveying pipe according to claim 4, characterized in that: The unblocking pipe (8) is a tubular body protruding outward from the conveying pipe body (1), and the axis of the unblocking pipe (8) is inclined upward relative to the axis of the conveying pipe body (1). The axial length of the unblocking pipe (8) is greater than the length of the detachable plug (9). The end of the detachable plug (9) away from the conveying pipe body (1) is provided with an external thread, and the end of the unblocking pipe (8) away from the axis of the conveying pipe is provided with an internal thread. The external thread and the internal thread cooperate to fix the detachable plug (9).
6. The concrete conveying pipe according to claim 1, characterized in that: The end of the conveying pipe body (1) near the second connecting flange (3) extends axially to form a connecting section (10). The inner diameter of the first connecting flange (2) is larger than the pipe diameter of the conveying pipe body (1) so that the connecting section (10) can be coaxially inserted into the first connecting flange (2).
7. The concrete conveying pipe according to claim 6, characterized in that: The end of the connecting section (10) near the other conveying pipe body (1) is provided with an inclined surface (11), and the inner wall of the first connecting flange (2) is provided with a matching surface (12) that matches the inclined surface (11).
8. The concrete conveying pipe according to claim 1, characterized in that: The protrusion (5) is a downward protrusion (5) hemispherical, and the depression (6) is a depression (6) matching the hemispherical protrusion (5).