Self-adapting anti-blocking pipe reducing joint for concrete pumping pipeline

Abstract

The application relates to a self-adaptive anti-blocking pipe reducing joint of a concrete pumping pipeline, and relates to the technical field of building engineering machinery matching equipment, which comprises a shell, inlet and outlet flanges, a reducing adjusting assembly and a pressure feedback assembly arranged in the shell, the reducing adjusting assembly comprises first and second guide rib plates fixed in the shell, a conical sleeve ring spliced by multiple arc-shaped valves and a rotating plate with rotating protrusions, and the pressure feedback assembly comprises a pressure cavity, a hydraulic connecting pipe and a hydraulic piston; when the pipeline pressure rises, the pressure cavity senses the pressure and pushes the rotating plate to rotate along the guide groove through the hydraulic piston, and the arc-shaped valves are deflected outward to expand the pipe diameter. The application has the effects that the concrete fluid pressure is used as a driving source, the function of self-adaptively adjusting the pipeline cross-sectional area according to the conveying resistance is realized, the problem that the pipeline is easily blocked under high-viscosity working conditions is effectively solved, and the structure is compact, power driving is not needed, and the response speed is fast.

Description

Technical Field

[0001] This utility model relates to the field of supporting equipment for construction machinery, and in particular to adaptive anti-clogging pipe reducer joints for concrete pumping pipelines. Background Technology

[0002] Currently, in modern construction, concrete pumping equipment is widely used in concrete conveying operations for high-rise buildings, bridges, and tunnels. In order to adapt to the pipe connection requirements of different construction locations and adjust the conveying pressure, reducers (usually called tapered pipes) are often used in pumping pipelines to connect straight pipes of different diameters, so as to achieve the transition of pipe diameter and accelerate the conveying of slurry.

[0003] However, most existing concrete reducer joints adopt a rigid conical structure that is integrally cast or welded, and the diameter of its internal flow channel is fixed after manufacturing. In actual pumping operations, the fluidity of concrete is affected by various factors such as raw material ratio, aggregate particle size, and dwell time. When conveying high-viscosity concrete or when aggregates accumulate locally at the reducer, the conveying resistance in the pipeline will increase sharply.

[0004] Because the diameter of existing reducing couplings cannot be dynamically adjusted according to pressure changes, high-pressure slurry is prone to bridging due to poor drainage when passing through the contraction port, causing the aggregate to seize up instantly at the diameter change point and form a blockage. Once a blockage occurs, it can lead to pumping interruption and require manual pipe dismantling and cleaning, severely impacting construction efficiency; in severe cases, excessive pressure inside the pipe can cause a pipe burst, posing a significant threat to the safety of personnel and equipment on site. How to design a device that can automatically adjust the diameter according to the conveying pressure has become an urgent technical problem to be solved.

[0005] In response to the aforementioned related technologies, this utility model proposes an adaptive anti-clogging pipe reducer for concrete pumping pipelines to address the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this application is to provide an adaptive anti-clogging reducer for concrete pumping pipelines, which solves the problems of fixed and unadjustable pipe diameter, difficulty in sensing changes in internal conveying pressure, easy pipe blockage under high viscosity or high resistance conditions, and lack of automatic overload protection mechanism in concrete pumping pipeline reducers.

[0007] In the first aspect, the adaptive anti-clogging pipe reducer for concrete pumping pipelines provided in this application adopts the following technical solution: including: a shell, an inlet flange fixedly connected to the left end face of the shell, and an outlet flange bolted to the right end face of the shell; and a reducer adjustment component and a pressure feedback component disposed inside the shell.

[0008] The variable diameter adjustment assembly includes a tapered collar capable of changing the flow cross-sectional area, a rotating plate for transmitting driving force, and a first guide rib and a second guide rib that provide support and positioning.

[0009] Furthermore, the outer peripheries of the first guide rib and the second guide rib are both fixedly connected to the inner wall of the housing, and the two are spaced apart along the axial direction of the housing; the conical collar is formed by splicing multiple arc-shaped valves circumferentially, and one end of the arc-shaped valve is rotatably connected to the inner side of the first guide rib; the rotating plate is located inside the second guide rib, and a rotating protrusion is fixed on the outer wall of the rotating plate; an arc-shaped groove is formed on the second guide rib, and the rotating protrusion slides through the groove and extends to the outer side of the second guide rib; the inner wall of the rotating plate slides against the outer wall of the arc-shaped valve; the pressure feedback assembly includes a pressure chamber, multiple sets of hydraulic pistons, and a hydraulic connecting pipe; the pressure chamber is formed between the inner wall of the housing and the conical collar; the hydraulic piston is fixedly disposed on the outer side of the second guide rib; one end of the hydraulic connecting pipe is connected to the pressure chamber, and the other end is connected to the hydraulic piston; and the output end of the hydraulic piston is rotatably connected to the rotating protrusion of the rotating plate.

[0010] Preferably, a hinge shaft is fixedly connected to the outer side of the arc-shaped valve, and a shaft hole is provided on the inner side of the first guide rib. The arc-shaped valve is rotatably connected to the first guide rib through the hinge shaft. This connection method ensures that the arc-shaped valve can perform stable deflection movement around a fixed fulcrum.

[0011] Preferably, the inner wall of the arc-shaped valve is provided with an installation groove, and a shape memory alloy ring is embedded in the installation groove. The shape memory alloy ring has a ring structure and connects all the arc-shaped valves, using the shape memory effect of the shape memory alloy to provide a reset pull force.

[0012] Preferably, the inner side of the second guide rib is provided with a guide groove, the end of the rotating plate is slidably inserted into the guide groove, and the trajectory of the guide groove matches the rotation trajectory of the rotating plate, thereby providing precise track constraints for the rotation of the rotating plate.

[0013] Preferably, the inner wall of the conical collar is provided with an annular groove, which is formed by splicing together multiple arc-shaped grooves formed on the inner surface of the arc-shaped valve, in order to optimize the fluid contact surface structure.

[0014] Preferably, the pressure chamber is a sealed annular cavity, and the hydraulic connecting pipe passes through the second guide rib and extends to the hydraulic piston to achieve uniform pressure sensing and transmission.

[0015] Preferably, the first guide rib and the second guide rib are symmetrically distributed about the central plane of the variable diameter adjustment assembly to enhance the stress balance of the overall structure.

[0016] Preferably, the hydraulic pistons are evenly spaced along the circumference of the second guide rib, and each set of hydraulic pistons is connected to a corresponding rotating protrusion to ensure that the driving force can be evenly applied to the rotating plate.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. This utility model uses a mechanical linkage structure formed by setting a pressure feedback component and a diameter adjustment component. It utilizes the lateral pressure generated by the flow of concrete to drive a hydraulic piston, which in turn drives a rotating plate to rotate and push open the arc-shaped valve to expand the diameter of the conical collar. This solves the problem in the prior art that the diameter of the diameter adjustment joint of the concrete pumping pipeline is fixed and cannot be automatically adjusted under high viscosity or high resistance conditions, thus easily causing pipe blockage. It achieves the technical effect of adaptively adjusting the pipe cross-section according to the real-time delivery pressure without external power drive, effectively reducing flow resistance and preventing blockage.

[0019] 2. This utility model solves the problem of complex mechanical reset mechanisms being difficult to arrange in concrete conveying pipelines and prone to failure due to slurry adhesion by embedding a shape memory alloy ring on the inner side of the arc-shaped valve and utilizing the shape memory effect and elastic contraction force of the shape memory alloy. It achieves the technical effect of compact structure, rapid reset response and high reliability, and ensures that the device can automatically return to the initial standard diameter state after the pressure is removed.

[0020] 3. This utility model solves the problem of vibration, misalignment or even jamming of moving parts under high pressure pumping impact by setting a first guide rib and a second guide rib separately inside the shell, and by setting double limit and guide for the rotation of the arc-shaped valve and the sliding of the rotating plate respectively. It achieves the technical effect of improving the overall structural rigidity of the device, ensuring smooth and stable diameter change action and extending the service life of the equipment.

[0021] 4. This utility model constructs the pressure chamber as a sealed annular cavity covering the outside of the conical collar, and uses multiple sets of hydraulic pistons evenly distributed along the circumference for synchronous drive. This solves the problem of inaccurate single-point pressure sensing or uneven force on the mechanism caused by unilateral drive, and achieves the technical effect of accurately sensing pressure fluctuations inside the pipeline and realizing multi-directional synchronous and uniform diameter expansion, avoiding mechanical jamming. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the adaptive anti-clogging reducer for concrete pumping pipelines according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the shell structure of the adaptive anti-clogging pipe reducer joint for concrete pumping pipeline according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the rotating plate of the adaptive anti-clogging pipe reducer joint for concrete pumping pipelines according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the pressure chamber of the adaptive anti-clogging reducer joint for concrete pumping pipelines according to an embodiment of this application;

[0026] Explanation of reference numerals in the attached drawings: 1. Shell; 2. Inlet flange; 3. Outlet flange; 4. Variable diameter adjustment assembly; 401. Tapered collar; 402. Arc-shaped valve; 403. Shape memory alloy ring; 404. Rotating plate; 405. First guide rib; 406. Hinge shaft; 407. Ring groove; 408. Guide groove; 409. Second guide rib; 5. Pressure feedback assembly; 501. Pressure chamber; 502. Hydraulic piston; 503. Hydraulic connecting pipe. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0028] like Figure 1 and Figure 2 As shown, the adaptive anti-clogging reducer for concrete pumping pipelines includes a housing 1, an inlet flange 2 fixedly connected to the left end face of the housing 1, an outlet flange 3 bolted to the right end face of the housing 1, and a reducer adjustment assembly 4 and a pressure feedback assembly 5 disposed inside the housing 1. The housing 1 serves as the mounting base and pressure vessel for the entire device, used to contain concrete fluid and support internal components. It includes an inner wall and an outer wall to form a cylindrical structure with a certain strength. The inlet flange 2 is used to connect with the upstream pumping pipeline, and the outlet flange 3 is used to connect with the downstream pipeline. The reducer adjustment assembly 4 is used to change the internal flow cross-sectional area according to the mechanical driving force to adapt to different fluid pressures. The pressure feedback assembly 5 is used to sense the concrete fluid pressure and convert the pressure signal into mechanical energy to drive the reducer adjustment assembly 4.

[0029] The basic support structure of the variable diameter adjustment component 4 includes a first guide rib 405 and a second guide rib 409. The outer periphery of the first guide rib 405 is fixedly connected to the inner wall of the housing 1, and the outer periphery of the second guide rib 409 is also fixedly connected to the inner wall of the housing 1. The first guide rib 405 and the second guide rib 409 are distributed axially at intervals inside the housing 1. The first guide rib 405 and the second guide rib 409 are symmetrically distributed about the central plane of the variable diameter adjustment component 4. Together, they form the support skeleton of the internal moving parts, which is used to limit and guide the movement trajectory of the subsequent moving parts.

[0030] To solve the above-mentioned technical problems, the adaptive anti-clogging pipe reducer of the concrete pumping pipeline also includes a tapered collar 401 and a rotating plate 404. The tapered collar 401 and the aforementioned first guide rib 405 form a specific hinged fit relationship, and the rotating plate 404 and the second guide rib 409 form a sliding guide fit relationship.

[0031] Please refer to the following carefully. Figure 3 and Figure 4 The core structure will be described in detail below:

[0032] The conical collar 401 is not a one-piece fixed structure, but is composed of multiple arc-shaped valves 402 spliced ​​circumferentially. Each arc-shaped valve 402 has a hinge shaft 406 fixedly connected to its outer side. The inner side of the first guide rib 405 has a corresponding shaft hole for the hinge shaft 406 to mate with. The arc-shaped valves 402 are rotatably connected to the inner side of the first guide rib 405 via the hinge shaft 406. This connection method allows the arc-shaped valves 402 to deflect and open around the hinge shaft 406, thereby changing the size of the flow orifice at the center of the conical collar 401. To reduce the flow resistance when concrete passes through, the inner wall of the conical collar 401 is provided with a ring groove 407. The ring groove 407 is composed of multiple arc-shaped grooves spliced ​​on the inner surface of the arc-shaped valve 402. At the same time, in order to realize the automatic reset of the mechanism, the inner wall of the arc-shaped valve 402 is provided with an installation groove. The installation groove is inlaid with a shape memory alloy ring 403. The shape memory alloy ring 403 has a ring structure and connects all the arc-shaped valves 402. The elastic contraction force of the shape memory alloy ring 403 is used to pull the arc-shaped valve 402 to close and reset after the external driving force disappears.

[0033] Meanwhile, a rotating plate 404 is disposed on the inner side of the second guide rib 409, and a rotating protrusion is fixed on the outer side wall of the rotating plate 404. An arc-shaped groove is provided on the outer periphery of the second guide rib 409. The rotating protrusion slides through the groove and extends to the outer side of the second guide rib 409. The inner side wall of the rotating plate 404 slides against the outer wall of the arc-shaped valve 402. This contact fit allows the rotating plate 404 to directly drive the arc-shaped valve 402 to deflect outward around the hinge axis 406 by the thrust generated by the contact surface when it rotates. In addition, a guide groove 408 is provided on the inner side of the second guide rib 409. The end of the rotating plate 404 slides into the guide groove 408, and the trajectory of the guide groove 408 matches the rotation trajectory of the rotating plate 404. This double guide structure ensures that the rotating plate 404 can rotate smoothly along the preset circumferential trajectory when it is driven, preventing jamming or deviation.

[0034] Based on the above embodiments, the present invention also includes a detailed design for the internal structure and overall sealing performance of the pressure feedback component 5, so as to ensure the response accuracy and operational stability of the device under harsh working conditions.

[0035] As the core sensing unit of the pressure feedback component 5, the pressure chamber 501 is formed between the inner wall of the housing 1 and the outer wall of the conical collar 401, and is constructed as a sealed annular cavity. This annular covering structure enables the pressure chamber 501 to uniformly sense the radial expansion pressure on the conical collar 401, avoiding malfunctions caused by local pressure fluctuations. In order to achieve accurate pressure transmission, one end of the hydraulic connecting pipe 503 is directly connected to the pressure chamber 501, and the other end passes through the solid part of the second guide rib 409 and extends to the hydraulic piston 502, thereby guiding the fluid pressure in the pressure chamber 501 to the actuator without loss.

[0036] Regarding the layout of the actuator, multiple sets of hydraulic pistons 502 are evenly spaced along the circumference of the second guide rib 409. The output end of each set of hydraulic pistons 502 is independently corresponding to and connected to a rotating protrusion on the rotating plate 404. This multi-point synchronous drive method can ensure that the rotating plate 404 is subjected to force balance during rotation and prevent jamming friction between the rotating plate 404 and the guide groove 408 due to uneven load.

[0037] To further improve the sealing reliability of the device and prevent impurities from entering the moving parts, a sealing ring is provided between the sliding groove on the second guide rib 409 and the contact mating surface of the rotating plate 404. The sealing ring is tightly fitted to the surface of the rotating plate 404, which can effectively block external concrete slurry from seeping into the sliding groove and also prevent leakage of internal lubricating medium. In addition, in order to optimize the mechanical performance of the overall structure, the first guide rib 405 and the second guide rib 409 are symmetrically distributed about the center plane of the variable diameter adjustment component 4, so that the device can maintain structural stability when subjected to high-pressure pumping impact.

[0038] The implementation principle of this application embodiment is as follows:

[0039] When the concrete pumping operation starts and the slurry begins to be transported in the pipeline, the concrete fluid enters the interior of the shell 1 through the inlet flange 2 and generates lateral pressure on the inner wall. If the transport resistance increases and the internal pressure rises abnormally due to the high viscosity of the concrete or the accumulation of aggregate, the pressure chamber 501 located between the inner wall of the shell 1 and the conical collar 401 will immediately sense the pressure fluctuation and quickly transmit the high-pressure fluid medium to the cylinder of the hydraulic piston 502 through the hydraulic connection pipe 503, forcing the drive end of the hydraulic piston 502 to produce an outward linear displacement.

[0040] The thrust of the hydraulic piston 502 acts directly on the rotating protrusion on the outer side of the rotating plate 404, driving the rotating protrusion to slide along the groove on the outer periphery of the second guide rib 409, thereby causing the entire rotating plate 404 to rotate smoothly in a circular motion under the limiting guidance of the guide groove 408. Since the inner wall of the rotating plate 404 is tightly attached to the outer wall of the arc-shaped valve 402, the rotational displacement of the rotating plate 404 is converted into a mechanical thrust on the multiple arc-shaped valves 402, forcing each arc-shaped valve 402 to deflect outward synchronously around the hinge shaft 406 fixed on the first guide rib 405, so that the central diameter of the conical collar 401 spliced ​​by the arc-shaped valves 402 automatically expands, thereby significantly reducing the flow resistance of concrete when passing through this section and breaking the blockage balance by utilizing the pressure feedback of the fluid itself.

[0041] When the internal pressure of the pipeline decreases as the pipe diameter increases, or when the pumping operation stops and the pressure disappears, the driving pressure in the pressure chamber 501 and the hydraulic piston 502 is released. At this time, the shape memory alloy ring 403 embedded in the mounting groove inside the arc-shaped valve 402 uses the elastic contraction force generated by its shape memory effect to pull all the arc-shaped valves 402 to rotate in the opposite direction around the hinge axis 406 and return to the initial splicing state. The falling action of the arc-shaped valves 402 simultaneously pushes the rotating plate 404 to rotate in the opposite direction and presses back the hydraulic piston 502, so that the entire device automatically resets to the standard pipe diameter state and waits for the next pressure trigger.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. Adaptive anti-clogging reducer for concrete pumping pipelines, including: The housing (1), an inlet flange (2) fixedly connected to the left end face of the housing (1), and an outlet flange (3) bolted to the right end face of the housing (1), wherein a variable diameter adjustment assembly (4) and a pressure feedback assembly (5) are provided inside the housing (1); characterized in that the variable diameter adjustment assembly (4) includes a tapered collar (401), a rotating plate (404), a first guide rib (405) and a second guide rib (409), the outer peripheries of the first guide rib (405) and the second guide rib (409) are fixedly connected to the inner wall of the housing (1), and both are along the outer periphery of the housing (1). The conical collar (401) is formed by splicing multiple arc-shaped valves (402) circumferentially. One end of the arc-shaped valve (402) is rotatably connected to the inner side of the first guide rib (405). The rotating plate (404) is located inside the second guide rib (409). The outer side wall of the rotating plate (404) is fixed with a rotating protrusion. An arc-shaped groove is provided on the second guide rib (409). The rotating protrusion slides through the groove and extends to the outer side of the second guide rib (409). The inner side wall of the rotating plate (404) slides against the outer wall of the arc-shaped valve (402).

2. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 1, characterized in that, The pressure feedback assembly (5) includes a pressure chamber (501), multiple sets of hydraulic pistons (502), and a hydraulic connecting pipe (503). The pressure chamber (501) is formed between the inner wall of the housing (1) and the conical collar (401). The hydraulic piston (502) is fixedly disposed on the outer side of the second guide rib (409). One end of the hydraulic connecting pipe (503) is connected to the pressure chamber (501), and the other end is connected to the hydraulic piston (502). The output end of the hydraulic piston (502) is rotatably connected to the rotating protrusion of the rotating plate (404). A hinge shaft (406) is fixedly connected to the outer side of the arc-shaped valve (402). The inner side of the first guide rib (405) is provided with a shaft hole. The arc-shaped valve (402) is rotatably connected to the first guide rib (405) through the hinge shaft (406).

3. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 1, characterized in that, The inner wall of the arc-shaped valve (402) is provided with an installation groove, and a shape memory alloy ring (403) is embedded in the installation groove. The shape memory alloy ring (403) has a ring structure and connects all the arc-shaped valves (402).

4. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 1, characterized in that, The inner side of the second guide rib (409) is provided with a guide groove (408), and the end of the rotating plate (404) is slidably inserted into the guide groove (408), and the trajectory of the guide groove (408) matches the rotation trajectory of the rotating plate (404).

5. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 1, characterized in that, The inner wall of the conical collar (401) is provided with an annular groove (407), which is formed by splicing together multiple arc-shaped grooves opened on the inner surface of the arc-shaped valve (402).

6. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 2, characterized in that, The pressure chamber (501) is a sealed annular cavity, and the hydraulic connecting pipe (503) passes through the second guide rib (409) and extends to the hydraulic piston (502).

7. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 1, characterized in that, The first guide rib (405) and the second guide rib (409) are symmetrically distributed about the center plane of the variable diameter adjustment assembly (4).

8. The self-adaptive anti-clogging reducer for concrete pumping pipelines according to claim 2, characterized in that, The hydraulic pistons (502) are evenly spaced along the circumference of the second guide rib (409), and each set of hydraulic pistons (502) is connected to a rotating protrusion.

Images