A device for reducing the water flow resistance of steel pipe piles in water of steel trestle

Abstract

The present invention discloses a device for reducing the water flow resistance of steel pipe piles in water on a steel trestle, belonging to the field of steel pipe pile protection devices. The device comprises: a fixing ring, a guide plate, and a connecting column; the steel pipe piles are symmetrically fixed with two fixing rings; the piles are connected via two connecting columns; the connecting columns are provided with a slot; the slots are detachably fixed with a connecting plate; the connecting plates are all connected to the guide plates; compared with the prior art, the device for reducing the water flow resistance of steel pipe piles in water on a steel trestle in the present application adopts a streamlined tip to reduce the water resistance shape coefficient of the steel pipe piles, thereby achieving the purpose of reducing the dynamic water load acting on the steel pipe piles of the trestle; in addition, the position of the tip can be adjusted by a sliding component.

Description

Technical Field

[0001] The invention relates to the field of steel pipe pile protection devices, in particular to a device for reducing the water flow resistance of steel pipe piles in water of a steel trestle. Background Art

[0002] Currently, steel trestles are commonly used to assist in the construction of bridges spanning rivers or as access roads. Steel trestles typically utilize steel pipe piles as their foundation. In areas with high water velocities, the foundation design of steel trestles is subject to significant dynamic water loads, necessitating the use of steel pipe bracing or downstream legs to enhance the lateral stability of the trestles. Counteracting these dynamic water loads often incurs significant cost. Therefore, a device was proposed to reduce the water flow resistance of steel pipe piles in water on steel trestles. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention proposes a device for reducing the water flow resistance of steel pipe piles in water of a steel trestle.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A device for reducing the water flow resistance of steel pipe piles in water on a steel trestle comprises: a fixing ring, a guide plate, and a connecting column; the steel pipe piles are symmetrically fixedly mounted with two fixing rings; the piles are connected via two connecting columns; the connecting columns are provided with slots; the slots are detachably fixedly mounted with connecting plates; the connecting plates are each connected to the guide plates; the other ends of the two guide plates are fixedly connected; and the angle between the two guide plates is less than 180 degrees.

[0006] Furthermore, the fixing ring is provided with an annular groove; the connecting column is provided with a sliding assembly in the groove; the sliding assembly includes a slider, a roller and a movable plate; the slider is slidably connected to the fixing ring; the side of the slider close to the steel pipe pile is slidably connected to two movable rods 1; the side of the slider away from the steel pipe pile is slidably connected to two movable rods 2; the movable rods 1 and 2 are symmetrically arranged on the slider; the slider is fixedly installed with a pillar between the movable rods 1 and 2;

[0007] The pillar is fixedly installed with two sliding rails; the sliding rails are symmetrically slidably connected to movable blocks; the movable blocks are fixedly installed with movable seats; the movable seats are rotatably connected to connecting rods; the two connecting rods are respectively rotatably connected to one movable rod one, and the other two connecting rods are respectively rotatably connected to one movable rod two; the movable blocks are rotatably connected to the rollers; the inner and outer walls of the grooves are circumferentially arranged with cylindrical grooves; the cylindrical grooves are adapted to the rollers; the movable rod one and the movable rod two are fixedly installed to the movable plate; the slider is rotatably connected to a screw; the screw is threadedly connected to the movable plate.

[0008] Furthermore, the slider is rotatably connected to a drive shaft; a disc is fixedly mounted on the drive shaft; the disc is provided with a hexagonal groove; a bevel gear 1 is fixedly mounted on the screw, and a bevel gear 2 is fixedly mounted on the drive shaft; the bevel gear 1 is meshed with the bevel gear 2.

[0009] Furthermore, the fixing columns are fixedly mounted with sealing covers between the sliding blocks.

[0010] Furthermore, the fixing ring is composed of two semicircular rings; a fixing plate is fixedly installed on the semicircular ring; and the fixing plate is provided with a through hole.

[0011] Furthermore, the included angle of the guide plate is an obtuse angle.

[0012] Beneficial effects of the present invention:

[0013] The device of the present invention for reducing the water flow resistance of steel pipe piles in water of a steel trestle adopts a streamlined tip to reduce the water resistance shape coefficient of the steel pipe piles, thereby achieving the purpose of reducing the dynamic water load acting on the steel pipe piles of the trestle; in addition, the position of the tip can be adjusted by a sliding component. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0016] Figure 2 A schematic diagram of a tipless plate for this application;

[0017] Figure 3 This is a schematic diagram of the application without a cover;

[0018] Figure 4 A partially enlarged schematic diagram of this application;

[0019] Figure 5 This is a partial cutaway diagram of the present application. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0023] A device for reducing the flow resistance of steel pipe piles in water on a steel trestle comprises: a fixing ring 1, a guide plate 5, and a connecting column 2; a steel pipe pile 25 is symmetrically fixed with two fixing rings 1; the fixing rings 1 are connected by two connecting columns 2; the connecting column 2 is provided with a slot 3; the slot 3 is detachably fixed with a connecting plate 4; the connecting plates 4 are each connected to a guide plate 5; the other ends of the two guide plates 5 are fixedly connected; the angle between the two guide plates 5 is less than 180 degrees. When in use, the steel pipe pile 25 is first fixed to the ground, and then the fixing ring 1 is installed. In some embodiments, the fixing ring 1 can also be mounted on a sleeve, and then the sleeve is fixed to the steel pipe pile 25. The above fixing and installation methods can be welding, screw and nut connection, snap connection, etc. After the fixing ring 1 is installed and the direction is adjusted, the connecting plate 4 is inserted into the slot 3 of the connecting column 2 and connected to the connecting column 2 as a whole by screwing and nut, snap connection, locking, pressing, etc., and the triangular ends of the two fixed guide plates 5, that is, the angle between them, are aligned with the direction of water flow. After the steel pipe pile 25 is driven into the riverbed, the above mechanism is installed. Under the action of the guide plate 5, the water blocking surface of the steel pipe pile 25 changes from a circular shape to a streamlined tip. The calculation formula of the dynamic water load acting on the trestle steel pipe pile 25 is: P = K × A (γ × v 2 / 2g);

[0024] Where: P is the dynamic water load force KN;

[0025] A is the water-blocking area of the component. In the trestle, the bearing part is mainly the steel pipe pile 25, A = LD, where L is the depth of immersion in water and D is the outer diameter of the steel pipe. The specific gravity of water is generally 10KN / m3.

[0026] g is the standard free fall acceleration of 10m / s2

[0027] V is the flow velocity m / s used in the calculation

[0028] K is the water-blocking shape factor, and its values are as follows: 1.5 for square, 1.3 for rectangle with long side parallel to water flow, 0.8 for circle, 0.7 for pointed end, and 0.6 for round end;

[0029] As can be seen from the above formula, in the trestle, the part that bears the dynamic water load is mainly the steel pipe pile 25. Generally, the K of the round steel pipe pile 25 is 0.8, and the K of the pointed steel pipe pile 25 is 0.7. The use of the streamlined pointed steel pipe pile 25 can reduce the water-resistance shape coefficient of the component, thereby achieving the purpose of reducing the dynamic water load acting on the trestle steel pipe pile 25.

[0030] Furthermore, the fixing ring 1 is provided with an annular groove 6; the connecting column 2 is provided with a sliding assembly in the groove 6; the sliding assembly includes a slider 7, a roller 14 and a movable plate 16; the slider 7 is slidably connected to the fixing ring 1; the side of the slider 7 close to the steel pipe pile 25 is slidably connected to two movable rods 1 8; the side of the slider 7 away from the steel pipe pile 25 is slidably connected to two movable rods 2 9; the movable rod 1 8 and the movable rod 2 9 are symmetrically arranged on the slider 7; the slider 7 is fixedly installed with a pillar between the movable rod 1 8 and the movable rod 2 9; under the action of the slider 7, the connecting column 2 can move in the groove 6, and the two connecting columns 2 can drive the guide plate 5 to rotate, so that the guide plate 5 is aligned with the direction of water flow. Therefore, before installing the fixing ring 1, there is no need to pay attention to whether the angle of the guide plate 5 is consistent with the direction of water flow. The angle of the guide plate 5 can be adjusted after the fixing ring 1 is installed.

[0031] The pillars are fixedly installed with two sliding rails 10; the sliding rails 10 are symmetrically slidably connected to movable blocks 11; the movable blocks 11 are fixedly installed with movable seats 12; the movable seats 12 are rotatably connected to connecting rods 13; the two connecting rods 13 are respectively rotatably connected to a movable rod 18, and the other two connecting rods 13 are respectively rotatably connected to a movable rod 2 9; the movable blocks 11 are rotatably connected to rollers 14; the rollers 14 can improve the rolling smoothness of the sliding assembly; the inner and outer walls of the groove 6 are circumferentially arranged with cylindrical grooves 15; the cylindrical grooves 15 are adapted to the rollers 14; the movable rod 1 8 and the movable rod 2 9 are both fixedly installed with the movable plate 16; the slider 7 is rotatably connected to the screw 17; the screw 17 is threadedly connected to the movable plate 16. After adjusting the direction of the guide plate 5, rotate the screw 17, the screw 17 drives the movable plate 16 and the movable rod 1 8 and the movable rod 2 9 to move downward, and then the movable rod 1 8 and the movable rod 2 9 drive the connecting rod 13 to rotate, and the connecting rod 13 drives the movable seat 12, the movable block 11 and the roller 14 to move toward the cylindrical groove 15, the two rollers 14 enter the cylindrical groove 15 on the outer wall of the groove 6, and the two rollers 14 enter the cylindrical groove 15 inside the groove 6, thereby fixing the slider 7, thereby completely fixing the guide plate 5.

[0032] Furthermore, the slider 7 is rotatably connected to a drive shaft 18; a disc 19 is fixedly mounted on the drive shaft 18; the disc 19 is provided with a hexagonal slot; a bevel gear 1 21 is fixedly mounted on the screw 17, and a bevel gear 2 20 is fixedly mounted on the drive shaft 18; bevel gear 1 21 meshes with bevel gear 2 20. Using a hexagonal wrench, the drive shaft 18 rotates, which in turn drives the screw 17 via the bevel gear, thereby changing the fixed state of the slider 7 and facilitating operation.

[0033] Furthermore, sealing covers 22 are fixedly mounted between the fixing columns and the sliders 7 to enhance the internal waterproofness of the device and prevent the sliding components from being immersed in water.

[0034] Furthermore, the fixing ring 1 is composed of two semicircular rings; the semicircular rings are fixedly installed with a fixing plate 23; the fixing plate 23 is provided with a through hole; when installing, the semicircular rings are first put on the steel pipe pile 25, and then the fixing ring 1 can be assembled by screwing the nuts through the through holes.

[0035] Furthermore, the included angle of the guide plate 5 is an obtuse angle, which can increase the diversion surface of the water flow and improve the guidance of the water flow.

[0036] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A device for reducing the water flow resistance of steel pipe piles in water of a steel trestle, characterized in that: include: A fixing ring (1), a guide plate (5), and a connecting column (2); the steel pipe pile (25) is symmetrically fixedly mounted with two fixing rings (1); the fixing rings (1) are connected via two connecting columns (2); the connecting column (2) is provided with a clamping groove (3); the clamping groove (3) is detachably fixedly mounted with a connecting plate (4); the connecting plates (4) are each connected to the guide plate (5); the other ends of the two guide plates (5) are fixedly connected; the angle between the two guide plates (5) is less than 180 degrees; The fixing ring (1) is provided with an annular groove (6); the connecting column (2) is provided with a sliding assembly in the groove (6); the sliding assembly includes a slider (7), a roller (14) and a movable plate (16); the slider (7) is slidably connected to the fixing ring (1); the side of the slider (7) close to the steel pipe pile (25) is slidably connected to two movable rods (1) (8); the side of the slider (7) away from the steel pipe pile (25) is slidably connected to two movable rods (2) (9); the movable rod (1) (8) and the movable rod (2) (9) are symmetrically arranged on the slider (7); the slider (7) is fixedly installed with a pillar between the movable rod (1) (8) and the movable rod (2) (9); The pillar is fixedly mounted with two slide rails (10); the slide rails (10) are symmetrically slidably connected to movable blocks (11); the movable blocks (11) are fixedly mounted with movable seats (12); the movable seats (12) are rotatably connected to connecting rods (13); the two connecting rods (13) are rotatably connected to one movable rod 1 (8), and the other two connecting rods (13) are rotatably connected to one movable rod 2 (9); the movable blocks (11) are rotatably connected to the rollers (14); the inner and outer walls of the groove (6) are circumferentially arranged with cylindrical grooves (15); the cylindrical grooves (15) are adapted to the rollers (14); the movable rod 1 (8) and the movable rod 2 (9) are fixedly mounted to the movable plate (16); the slider (7) is rotatably connected to a screw (17); the screw (17) is threadedly connected to the movable plate (16); The fixing ring (1) is composed of two semicircular rings; a fixing plate (23) is fixedly mounted on the semicircular rings; and the fixing plate (23) is provided with a through hole.

2. The device for reducing the water flow resistance of steel pipe piles in water of a steel trestle according to claim 1 is characterized in that: The slider (7) is rotatably connected to a drive shaft (18); a disk (19) is fixedly mounted on the drive shaft (18); the disk (19) is provided with a hexagonal groove; a bevel gear 1 (21) is fixedly mounted on the screw (17), and a bevel gear 2 (20) is fixedly mounted on the drive shaft (18); the bevel gear 1 (21) is meshed with the bevel gear 2 (20).

3. The device for reducing the water flow resistance of steel pipe piles in water of a steel trestle according to claim 1, characterized in that: The fixing ring (1) is fixedly provided with a sealing cover (22) above the sliding block (7).

4. The device for reducing the water flow resistance of steel pipe piles in water of a steel trestle according to claim 1, characterized in that: The included angle of the guide plate (5) is an obtuse angle.

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