A pump truck delivery pipe centering and locking connection mechanism

Abstract

This utility model belongs to the field of pump truck delivery pipes, and in particular, it is a centering and locking connection mechanism for pump truck delivery pipes. Addressing the problem that existing delivery pipes are prone to deformation under stress after long-term use, causing the pipe to deviate from the central axis of the boom's rotation, leading to structural damage and reduced service life, the following solution is proposed: A first boom, with a first connecting pipe installed on one side via a first connector, one end of which is fixedly connected to a first bend; a second boom, with a second connecting pipe installed on one side via a first connector, one end of which is fixedly connected to a second bend; a rotating sleeve is fixedly installed at one end of the second boom. This utility model ensures that the rotation axis of the second bend (and the second connecting pipe connected thereto) always coincides with the relative rotation axis between the first and second booms, effectively preventing the delivery pipe from deviating from the central axis of the boom's rotation due to deformation under stress from long-term use.

Description

Technical Field

[0001] This utility model relates to the field of pump truck delivery pipe technology, and in particular to a pump truck delivery pipe centering and locking connection mechanism. Background Technology

[0002] The concrete pump truck's delivery pipe is a core component, responsible for transporting concrete from the pump body to the work site. It is widely used in housing construction, bridge and tunnel construction, underground mining, large-scale foundation engineering, and environmental and municipal engineering projects.

[0003] In existing technology, the pump truck's delivery pipe consists of multiple connecting pipes and bends, which are deployed by the boom. The boom is driven by a hydraulic cylinder, and the bends between adjacent booms rotate relative to each other. However, after long-term use, the delivery pipe is prone to deformation under stress, causing the pipe to deviate from the central axis of the boom's rotation, which can easily lead to structural damage and reduce its service life.

[0004] Therefore, we propose a centering and locking connection mechanism for the pump truck delivery pipe. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where the conveying pipe is prone to deformation under stress after long-term use, causing the conveying pipe to deviate from the central axis of the boom rotation, which can easily lead to structural damage and reduce service life. Therefore, this invention proposes a pump truck conveying pipe centering and locking connection mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pump truck delivery pipe alignment and locking connection mechanism includes:

[0008] The first boom has a first connecting pipe installed on one side via a first connector, and one end of the first connecting pipe is fixedly connected to a first bend.

[0009] The second boom has a second connecting pipe installed on one side via a first connector, and one end of the second connecting pipe is fixedly connected to a second bend.

[0010] A rotating sleeve is fixedly installed at one end of the second boom, and the rotating sleeve can rotate relative to the first boom;

[0011] The second bend passes through the rotating sleeve and is rotatably connected to the first bend via the second connector.

[0012] The locking mechanism is located on the outer wall of the second bend and is used to constrain the axial and circumferential displacement of the second bend.

[0013] In one possible design, the locking mechanism includes:

[0014] A positioning sleeve fixed to the outer wall of the second bend;

[0015] Two first positioning grooves are formed on the inner wall of the rotating sleeve;

[0016] Two locking bolts with threads penetrating the outer wall of the second boom;

[0017] The positioning sleeve is fitted into the first positioning groove, and two connecting grooves are provided on the outer wall of the positioning sleeve.

[0018] The end of the locking bolt passes through the second boom and the rotating sleeve in sequence and extends into the connecting groove.

[0019] In one possible design, the first connector includes:

[0020] The first arm is welded to the side of the first boom;

[0021] A clamping plate fixed to the end of the first arm, the clamping plate having an arc-shaped groove adapted to the outer diameter of the first connecting pipe;

[0022] A sleeve fitted onto the outer wall of the first connecting pipe, with vertically fixed studs at both ends of the sleeve;

[0023] The stud passes through the clamping plate and is locked in place by a nut;

[0024] The jacket has clearance grooves at both ends to accommodate the clamping plates.

[0025] In one possible design, a positioning ring is fixed to the outer wall of the first connecting pipe;

[0026] The inner wall of the jacket and the bottom of the arc-shaped groove of the clamping plate are both provided with a second positioning groove;

[0027] The positioning ring is engaged in the second positioning groove.

[0028] In one possible design, the second connector includes:

[0029] The second arm is welded to the side of the first arm;

[0030] The lower pipe clamp is fixed to the end of the second arm;

[0031] The upper pipe clamp is connected to the lower pipe clamp by bolts;

[0032] The lower pipe clamp and the upper pipe clamp cover the joint between the first bend and the second bend.

[0033] In one possible design, a first sealing ring is embedded in the mating end face of the first bend and the second bend respectively;

[0034] The inner walls of both the lower and upper pipe clamps are fitted with second sealing rings.

[0035] In this application, when the hydraulic cylinder drives the second boom to rotate relative to the first boom, the second boom drives the second connecting pipe to rotate, and at the same time, the second boom drives the rotating sleeve to rotate, and the rotating sleeve drives the positioning sleeve to rotate, thereby driving the second bent pipe to rotate, so that the second connecting pipe and the second bent pipe rotate synchronously around the axis of the rotating sleeve, and the second bent pipe and the first bent pipe rotate relative to each other.

[0036] Beneficial effects: In this utility model, the pump truck delivery pipe centering and locking connection mechanism, through the setting of the first bend, the second bend and the second connecting pipe, ensures that the rotation axis of the second bend (and the second connecting pipe connected thereto) always coincides with the relative rotation axis between the first boom and the second boom, effectively preventing the delivery pipe from deviating from the boom rotation center axis due to long-term use and deformation.

[0037] In this utility model, the pump truck delivery pipe centering and locking connection mechanism, through the setting of the first positioning groove, positioning sleeve and connecting groove and other structures, can position and lock the second bend pipe, ensuring that the delivery pipe maintains a precise centering position when the boom rotates and is in operation, suppressing vibration displacement, preventing structural damage caused by misalignment, and extending service life;

[0038] In this utility model, the pump truck delivery pipe centering and locking connection mechanism, through the setting of a first positioning groove, a second positioning groove and a positioning ring, can accurately position the connection between various components, ensuring the stability of the structural connection. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a pump truck delivery pipe centering and locking connection mechanism proposed in this utility model;

[0040] Figure 2 This is a partial three-dimensional structural schematic diagram of a pump truck delivery pipe centering and locking connection mechanism proposed in this utility model;

[0041] Figure 3 This is an exploded view of the first-person perspective of the centering and locking connection mechanism for a pump truck delivery pipe proposed in this utility model.

[0042] Figure 4 This is an exploded view of the second perspective of the alignment and locking connection mechanism for a pump truck delivery pipe proposed in this utility model.

[0043] Figure 5 This is a third-view exploded structural diagram of a pump truck delivery pipe centering and locking connection mechanism proposed in this utility model.

[0044] In the diagram: 1. First boom; 2. First connecting pipe; 3. First bend; 4. Second boom; 5. Second connecting pipe; 6. Second bend; 7. Rotating sleeve; 8. First positioning groove; 9. Locking bolt; 10. Positioning sleeve; 11. Connecting groove; 12. First support arm; 13. Clamping plate; 14. Clamping sleeve; 15. Stud; 16. Second positioning groove; 17. Positioning ring; 18. Relief groove; 19. Second support arm; 20. Lower pipe clamp; 21. Upper pipe clamp; 22. First sealing ring; 23. Second sealing ring. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0046] In one embodiment: Refer to Figures 1-5 A centering and locking connection mechanism includes: a first boom 1, a second boom 4, a delivery pipeline and a locking mechanism.

[0047] A first arm 12 is welded to the side of the first boom 1, and a clamping plate 13 is fixedly installed at the end of the first arm 12. An arc-shaped groove is machined on the side of the clamping plate 13 facing the first connecting pipe 2, and the curvature of the groove matches the outer diameter of the first connecting pipe 2. A sleeve 14 is fitted onto the outer wall of the first connecting pipe 2, and studs 15 are vertically welded to both ends of the sleeve 14. The studs 15 pass through a through hole on one side of the clamping plate 13 and are locked by nuts. Relief grooves 18 are provided at both ends of the sleeve 14, and the depth of the relief grooves 18 matches the thickness of the clamping plate 13, allowing the clamping plate 13 to be embedded in the relief grooves 18 for compact assembly. A first bent pipe 3 is welded to the end of the first connecting pipe 2, and the internal channels of the two are connected.

[0048] The second boom 4 adopts the same connection structure as the first boom 1: a second connecting pipe 5 is installed on its side via the first support arm 12, clamping plate 13, and sleeve 14, and a second bent pipe 6 is welded to the end of the second connecting pipe 5. A rotating sleeve 7 is welded to the end of the second boom 4, and the rotating sleeve 7 is coaxially rotatably connected to the first boom 1 through a bearing. The second bent pipe 6 passes through the central through hole of the rotating sleeve 7, and its axis coincides with the rotation axis of the rotating sleeve 7.

[0049] A second support arm 19 is welded to the side of the first support arm 12, and a lower pipe clamp 20 is fixedly installed at the end of the second support arm 19. The top of the lower pipe clamp 20 is connected to the upper pipe clamp 21 by bolts, and the two form an annular cavity when they are joined together. The ends of the first bend 3 and the second bend 6 are placed in this cavity, and the lower pipe clamp 20 and the upper pipe clamp 21 hug and enclose the two bends.

[0050] First sealing rings 22 are respectively installed on the mating end faces of the first bend 3 and the second bend 6 to achieve pipe end sealing. Second sealing rings 23 are installed in the annular grooves on the inner walls of the lower pipe clamp 20 and the upper pipe clamp 21. When the pipe clamps are locked, the second sealing rings 23 are deformed under pressure to fill the gap between the pipe wall and the pipe clamp, forming a secondary sealing barrier.

[0051] A positioning sleeve 10 is welded to the outer wall of the second bend 6, and the outer diameter of the positioning sleeve 10 is clearance-fitted with the inner diameter of the rotating sleeve 7. Two first positioning grooves 8 are symmetrically machined on the inner wall of the rotating sleeve 7, and two connecting grooves 11 are machined at corresponding positions on the outer wall of the positioning sleeve 10. During assembly, the positioning sleeve 10 is inserted into the rotating sleeve 7, so that the outer wall of the positioning sleeve 10 is engaged with the first positioning grooves 8, thus restricting the circumferential degree of freedom of the second bend 6.

[0052] The outer wall of the second boom 4 is threaded through two locking bolts 9. When the locking bolts 9 are tightened, their ends pass through the through holes in the side wall of the second boom 4 and the side wall of the rotating sleeve 7 in sequence, and finally push into the connecting groove 11 of the positioning sleeve 10. This operation achieves triple locking:

[0053] The end of the locking bolt 9 abuts against the bottom surface of the connecting groove 11, constraining the axial displacement of the second bend 6;

[0054] The bolt head presses against the outer wall of the second boom 4, so that the rotating sleeve 7 is fixedly connected to the second boom 4;

[0055] The engagement of the positioning sleeve 10 with the first positioning groove 8 prevents radial displacement.

[0056] This application can be used in the field of pump truck delivery pipes, or in other fields applicable to this application.

[0057] In another embodiment: a pump truck delivery pipe centering and locking connection mechanism, which is applied to the field of pump truck delivery pipes;

[0058] In another aspect of this embodiment, an annular protruding positioning ring 17 is welded to the outer wall of the first connecting pipe 2. Correspondingly, a second positioning groove 16 is machined on the inner wall of the sleeve 14 and the bottom of the arc-shaped groove of the clamping plate 13. During assembly, the positioning ring 17 is engaged in the second positioning groove 16 to form a circumferential constraint, preventing the first connecting pipe 2 from rotating or moving axially in the clamped state.

[0059] When the hydraulic cylinder drives the second boom 4 to rotate relative to the first boom 1, the second boom 4 drives the rotating sleeve 7 to rotate synchronously. The rotating sleeve 7 drives the second bend 6 to rotate through the fitting structure of the first positioning groove 8 and the positioning sleeve 10. The second bend 6 drives the second connecting pipe 5 to revolve around the axis of the rotating sleeve 7. At the same time, the second bend 6 and the first bend 3 rotate relative to each other under the constraint of the pipe clamp, ensuring the continuous flow of the concrete conveying channel.

[0060] The axial pressure provided by the locking bolt 9 ensures that the positioning sleeve 10 remains tightly engaged with the first positioning groove 8, eliminating vibration gaps during rotation. The engagement between the positioning ring 17 and the second positioning groove 16 suppresses fretting wear of the first connecting pipe 2 and the second connecting pipe 5. The dual-stage sealing structure (first sealing ring 22 and second sealing ring 23) maintains sealing pressure during pipe bending and prevents concrete slurry leakage.

[0061] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0062] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pump truck delivery pipe centering and locking connection mechanism characterized by, include: The first boom (1) has a first connecting pipe (2) installed on one side via a first connector, and one end of the first connecting pipe (2) is fixedly connected to the first bend pipe (3). The second boom (4) has a second connecting pipe (5) installed on one side via a first connector, and one end of the second connecting pipe (5) is fixedly connected to the second bend pipe (6). A rotating sleeve (7) is fixedly provided at one end of the second boom (4), and the rotating sleeve (7) can rotate relative to the first boom (1); The second bend (6) passes through the rotating sleeve (7) and is rotatably connected to the first bend (3) via the second connector; The locking mechanism is located on the outer wall of the second bend (6) and is used to constrain the axial and circumferential displacement of the second bend (6).

2. A pump truck delivery pipe centering and locking connection mechanism according to claim 1, characterized in that, The locking mechanism includes: Positioning sleeve (10) fixed to the outer wall of the second bend (6); Two first positioning grooves (8) are formed on the inner wall of the rotating sleeve (7); Two locking bolts (9) with threads passing through the outer wall of the second boom (4); The positioning sleeve (10) is fitted into the first positioning groove (8), and two connecting grooves (11) are opened on the outer wall of the positioning sleeve (10); The end of the locking bolt (9) passes through the second boom (4) and the rotating sleeve (7) in sequence and extends into the connecting groove (11).

3. A pump truck delivery pipe centering and locking connection mechanism according to claim 2, characterized in that The first connector includes: The first arm (12) is welded to the side of the first boom (1); A clamping plate (13) is fixed to the end of the first arm (12), and the clamping plate (13) is provided with an arc-shaped groove that matches the outer diameter of the first connecting pipe (2); A sleeve (14) is fitted onto the outer wall of the first connecting pipe (2), and studs (15) are vertically fixed at both ends of the sleeve (14); The stud (15) passes through the clamping plate (13) and is locked by a nut; The jacket (14) has relief grooves (18) at both ends to accommodate the clamping plate (13).

4. A pump truck delivery pipe centering and locking connection mechanism according to claim 3, characterized in that, A positioning ring (17) is fixed to the outer wall of the first connecting pipe (2); The inner wall of the sleeve (14) and the bottom of the arc-shaped groove of the clamping plate (13) are both provided with a second positioning groove (16); The positioning ring (17) is engaged in the second positioning groove (16).

5. A pump truck delivery pipe centering and locking connection mechanism according to claim 4, characterized in that The second connector includes: The second arm (19) is welded to the side of the first arm (12); The lower pipe clamp (20) is fixed to the end of the second arm (19); The upper pipe clamp (21) is connected to the lower pipe clamp (20) by bolts; The lower pipe clamp (20) and the upper pipe clamp (21) cover the joint between the first bend (3) and the second bend (6).

6. A pump truck delivery pipe centering and locking connection mechanism according to claim 5, characterized in that The first bend (3) and the second bend (6) are respectively fitted with a first sealing ring (22); The inner walls of both the lower pipe clamp (20) and the upper pipe clamp (21) are fitted with a second sealing ring (23).

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