Joint capable of being universally adjusted at connecting position of cross arm and stand column of monitoring rod

Abstract

The invention discloses a joint capable of being universally adjusted at the joint of a cross arm and a stand column of a monitoring rod. The joint comprises a supporting annular plate, an upper connecting annular plate, a lower connecting annular plate and a cross arm connecting plate stiffening plate. Wherein through holes are formed in the middle of the supporting annular plate, the middle of the upper connecting annular plate and the middle of the lower connecting annular plate, the stand column penetrates through the through holes, the upper connecting annular plate and the lower connecting annular plate are fixedly connected through the stiffening plates to form a sleeve shape to be arranged above the supporting annular plate, and the supporting annular plate is fixedly connected with the stand column. The same sides of the upper connecting ring plate and the lower connecting ring plate are fixedly connected with the cross arm connecting plate, and the other side of the cross arm connecting plate is fixedly connected with the cross arm; the supporting ring plate and the lower connecting ring plate are provided with an upper hole and a lower hole, and when the upper hole and the lower hole are aligned, an anti-rotation bolt is inserted to fix the supporting ring plate and the lower connecting ring plate. The horizontal cross arm of the monitoring rod can be freely adjusted and accurately limited in the 360-degree direction.

Description

Technical Field

[0001] The present invention relates to the technical field of security engineering, and is a node for universal adjustment at the connection between the cross arm and the column of a monitoring pole. Background Art

[0002] In today's society, monitoring devices in public areas have become an indispensable part of traffic management and security work. To enable the monitoring devices to obtain better vision and monitoring effects, it is necessary to adjust the monitoring angle during the installation and commissioning stage to adapt to the surrounding environment, and to adjust the angle of the cross arm of the monitoring pole during daily maintenance, repair, and cross arm maintenance.

[0003] In the prior art, the cross arm that can rotate around the column mostly adopts a connection method of steel pipes nested with each other. However, this method has many drawbacks. First, it is difficult to achieve good torsional limit, and the rod members will swing and shake during use due to loose connection, seriously affecting the effect of the monitoring device; second, the force is complex, which limits the length of the cross arm and makes it unable to bear a large force; third, the connection gap is blocked, resulting in the inability to effectively check the installation quality.

[0004] To achieve reliable fixation of the cross arm at any angle, some other methods have also been adopted in the prior art. For example, the common splint method mainly relies on friction to transmit force, but it is easy to loosen after long-term use and cannot ensure reliable fixation; ordinary bolt connection and pin connection methods allow too large an angle change and cannot meet the requirements of precise adjustment; when using methods such as tooth grooves for connection, the structure is complex, the gap is large, the connection is not tight enough, and the same swing problem will occur. In summary, the existing connection and angle adjustment technologies for the cross arm of the monitoring pole have obvious defects, and a new technical solution is urgently needed to solve these problems. Summary of the Invention

[0005] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a node for universal adjustment at the connection between the cross arm and the column of a monitoring pole.

[0006] A node for universal adjustment at the connection between the cross arm and the column of a monitoring pole according to the present invention includes: a support ring plate 3, an upper connection ring plate 5, a lower connection ring plate 4, a cross arm connection plate 6, and a stiffening plate I 7, and is characterized in that: through holes are opened in the middle of the support ring plate 3, the upper connection ring plate 5, and the lower connection ring plate 4 for the column 1 to pass through, and the upper connection ring plate 5 and the lower connection ring plate 4 are fixedly connected by the stiffening plate I 7 to form a sleeve-shaped structure placed above the support ring plate 3, and the support ring plate 3 is fixedly connected to the column 1; The same sides of the upper connection ring plate 5 and the lower connection ring plate 4 are fixedly connected to the cross arm connection plate 6, and the other side of the cross arm connection plate 6 is fixedly connected to the cross arm 2; The supporting ring plate 3 is provided with n lower holes 11, and the lower connecting ring plate 4 is provided with m upper holes 12. Both m and n are > 1, and m ≠ n; When the upper hole 12 and the lower hole 11 are aligned, the anti-rotation bolt 13 is inserted to fix the supporting ring plate 3 and the lower connecting ring plate 4.

[0007] Preferably, m = n + 1.

[0008] Preferably, the upper connecting ring plate 5 and the lower connecting ring plate 4 are in the shape of a semi-circular rectangle, and the horizontal end is fixedly connected to the cross-arm connecting plate 6.

[0009] Preferably, a stiffening plate II 8 is arranged below the supporting ring plate 3, and two adjacent right-angled sides of the stiffening plate II 8 are fixedly connected to the supporting ring plate 3 and the column 1 respectively; On one side where the cross-arm connecting plate 6 is connected to the cross-arm 2, a stiffening plate III 9 is arranged, and two adjacent right-angled sides of the stiffening plate III 9 are fixedly connected to the cross-arm connecting plate 6 and the cross-arm 2 respectively.

[0010] Preferably, the stiffening plate I 7 is in the shape of a rectangle, and the stiffening plates II 8 and III 9 are both in the shape of a wedge.

[0011] Preferably, the fixed connection method is welding.

[0012] Preferably, the inner diameter of the through holes opened in the upper connecting ring plate 5 and the lower connecting ring plate 4 is 0.5 - 3 mm larger than the outer diameter of the column 1.

[0013] Preferably, holes for the anti-loosening wedge pins 10 to pass through are also opened at positions of the upper connecting ring plate 5 and the lower connecting ring plate 4 close to the opened through holes. The holes are evenly distributed on the surfaces of the upper connecting ring plate 5 and the lower connecting ring plate 4, and the hole positions of the upper connecting ring plate 5 and the lower connecting ring plate 4 are corresponding; the anti-loosening wedge pins 10 pass through the upper connecting ring plate 5 and the lower connecting ring plate 4 at the same time, and the number of the anti-loosening wedge pins 10 ≥ 3.

[0014] Preferably, both the lower holes 11 and the upper holes 12 have internal threads, and the anti-rotation bolts 13 are high-strength bolts.

[0015] Preferably, the outer diameter of the supporting ring plate 3 is larger than the outer diameter of the lower connecting ring plate 4.

[0016] The present invention realizes that the horizontal cross-arm can be freely adjusted by 360 degrees and accurately limited in position, preventing rotation, and the adjustable corner accuracy is 360 / n - 360 / (n + 1) degrees.

[0017] The bolts are high-strength bolts. After the bolts are tightened, the upper and lower plates are pressed tightly, and a large frictional force is generated. There is no looseness during use, and there is a double safety reserve of frictional force of the screw and shear force of the screw for anti-torsion.

[0018] Anti-loosening wedge pins are added between the upper and lower connecting ring plates for fixation, and stiffening plates are added at the connecting parts of the cross arms to ensure tight connection and reliable force transmission.

[0019] By welding the supporting ring plate on the column, the cross arm is directly supported on the supporting ring plate through the upper and lower connecting ring plates, thus forming a connection that can bear the vertical bending moment and shear force of the cross arm and can rotate freely in the 360-degree direction; stiffening plates are added under the supporting ring plate to ensure the reliable connection and stiffness of the supporting ring plate. Brief Description of the Drawings

[0020] Figure 1 Cross-sectional view of the present invention; Figure 2 Schematic structural diagram of the present invention; Figure 3 Position relationship diagram of the node of the present invention with the column and the cross bar; 1-column, 2-cross arm, 3-supporting ring plate, 4-lower connecting ring plate, 5-upper connecting ring plate, Cross arm connecting plate, 7-stiffening plate I, 8-stiffening plate II, 9-stiffening plate III, 10-anti-loosening wedge pin, 11-upper hole, 12-upper hole, 13-anti-rotation bolt. Detailed Description of the Invention

[0021] The present invention will be further described in detail below in conjunction with the specific embodiments.

[0022] The implementation process of the present invention is as follows: The supporting ring plate 3 is fixed on the column 1 by welding, and a stiffening plate II 8 is arranged below the supporting ring plate 3 to ensure the connection and stiffness of the supporting ring plate and bear the vertical shear force.

[0023] The two semi-circular rectangular upper connecting ring plate 5 and the lower connecting ring plate 4 are supported and welded into a hollow sleeve shape by a rectangular stiffening plate I 7. The inner diameter of the through hole in the middle of the two upper and lower ring plates is 2 mm larger than the outer diameter of the column 1. The formed sleeve is easier to pass through the column 1 and will not shake due to excessive clearance. The number of the stiffening plates I 7 is selected as 6 pieces, which are evenly vertically distributed between the two upper and lower ring plates. To further ensure the tight connection of the node and the reliable transmission of the bending moment, 4 anti-loosening wedge pins are inserted between the upper and lower ring plates.

[0024] The rectangular sides connecting the upper connecting ring plate 5 and the lower connecting ring plate 4 are welded together with the cross-arm connecting plate 6, and the other surface of the cross-arm connecting plate 6 is welded to the cross-arm 2. To ensure the connection strength, a total of 4 symmetrically distributed stiffening plates III 9 are added at the connection between the cross-arm connecting plate 6 and the cross-arm 2. Two adjacent right-angled sides of the stiffening plate III 9 are respectively welded to the cross-arm connecting plate 6 and the cross-arm 2. At this time, the cross-arm 2 can already rotate 360° around the column 1.

[0025] To achieve reliable fixation of the cross-arm at any angle and prevent rotation is the difficulty and key of this design. The present invention proposes a misaligned screw hole limiting method. 15 screw holes with internal threads are arranged along the circumference on the support ring plate 3, and 16 screw holes are arranged along the circumference on the lower connecting ring plate 4. The misalignment angle between the upper and lower holes is nx1.5°, where n is the number of spaced holes. The principle is similar to that of a vernier caliper. As long as it rotates 1.5°, there will be a hole that can be aligned up and down. When adjusted to the required angle, the anti-rotation bolt 13 is tightened in the aligned hole, so as to achieve an angular adjustment with an accuracy of 1.5° within 360°. Among them, the anti-rotation bolt 13 uses a 10.9-grade high-strength bolt.

[0026] As described above, only some specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those familiar with the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A universally adjustable node for connecting a cross arm of a monitoring rod with a column, comprising: A supporting ring plate (3), an upper connecting ring plate (5), a lower connecting ring plate (4), a cross arm connecting plate (6) and a stiffening plate I (7), characterized in that: through holes are provided in the middle of the supporting ring plate (3), the upper connecting ring plate (5) and the lower connecting ring plate (4) to allow the column (1) to pass therethrough, and the upper connecting ring plate (5) and the lower connecting ring plate (4) are fixedly connected by the stiffening plate I (7) to form a sleeve shape and placed above the supporting ring plate (3), and the supporting ring plate (3) is fixedly connected to the column (1); The same side of the upper connecting ring plate (5) and the lower connecting ring plate (4) are both fixedly connected to the cross arm connecting plate (6), and the other side of the cross arm connecting plate (6) is fixedly connected to the cross arm (2); The supporting ring plate (3) is provided with n lower holes (11), and the lower connecting ring plate (4) is provided with m upper holes (12), where m and n are both greater than 1, and m≠n; When the upper hole (12) and the lower hole (11) are aligned, the anti-rotation bolt (13) is inserted to fix the supporting ring plate (3) and the lower connecting ring plate (4).

2. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: m=n+1.

3. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: The upper connecting ring plate (5) and the lower connecting ring plate (4) are in the shape of a semicircular rectangle, wherein a horizontal end thereof is fixedly connected to the cross arm connecting plate (6).

4. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: A stiffening plate II (8) is provided below the supporting ring plate (3), and two adjacent right-angled sides of the stiffening plate II (8) are fixedly connected to the supporting ring plate (3) and the column (1) respectively; A stiffening plate III (9) is provided on one side of the cross arm connecting plate (6) connected to the cross arm (2), and two adjacent right-angled sides of the stiffening plate III (9) are fixedly connected to the cross arm connecting plate (6) and the cross arm (2), respectively.

5. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 4, characterized in that: The stiffening plate I (7) is rectangular in shape, and the stiffening plate II (8) and the stiffening plate III (9) are both wedge-shaped in shape.

6. A universally adjustable node for connecting the cross arm of a monitoring rod and a column according to claims 1-5, characterized in that: The fixed connection method is welding.

7. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: The inner diameter of the through holes formed in the upper connecting ring plate (5) and the lower connecting ring plate (4) is 0.5-3 mm larger than the outer diameter of the column (1).

8. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: Holes for allowing the anti-loosening wedge pins (10) to pass through are also provided at positions near the through holes provided on the upper connecting ring plate (5) and the lower connecting ring plate (4), and the holes are evenly distributed on the surfaces of the upper connecting ring plate (5) and the lower connecting ring plate (4), and the positions of the holes of the upper connecting ring plate (5) and the lower connecting ring plate (4) are corresponding; the anti-loosening wedge pins (10) pass through the upper connecting ring plate (5) and the lower connecting ring plate (4) at the same time, and the number of the anti-loosening wedge pins (10) is ≥3.

9. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: The lower hole (11) and the upper hole (12) are both provided with internal threads.

10. The universally adjustable node for connecting the cross arm and the column of the monitoring rod according to claim 1, characterized in that: The outer diameter of the supporting ring plate (3) is greater than the outer diameter of the lower connecting ring plate (4).

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