A stepless adjustment lever loading device

Abstract

The application discloses a kind of stepless regulation lever loading device, including loading lever and model box, loading lever is included in the "Z" type structure and is loaded device, loaded device is transversely arranged, and adjusting device is installed at both ends thereof;Adjusting device includes slide rail, and slide rail is fixedly installed on counterforce wall and the side wall of vertically arranged loading beam respectively;The other end of force transmission beam is fixedly connected to the other side of loading beam, and the bottom of loading beam is fixed on foundation;The other end of force transmission beam is fixedly connected to multi-pile foundation, and multi-pile foundation is arranged in model box;The application utilizes loading beam, loaded device and force transmission beam to form loading lever, and the size of force applied to force transmission beam is controlled by adjusting device, and the adjusting device is used to realize stepless regulation, so that loading beam can be stopped at any desired position within the range of slide rail, thereby improving the accuracy of test and the accuracy of conclusion.

Description

Technical Field

[0001] This invention relates to a stepless adjustable lever loading device, belonging to the technical field of adjustable loading in model testing. Background Technology

[0002] Transmission towers, as tall structures, are characterized by their height, light weight, low stiffness, and slender shape. Due to the inherent mass and stiffness distribution characteristics of the towers, lateral loads are, in most cases, the design control load. With increasing distances from shore and water depths at offshore transmission tower sites, multi-pile foundations are becoming the preferred choice for more and more offshore transmission towers. Multi-pile foundations offer high overall structural stiffness and are less susceptible to environmental loads such as waves and currents, making them suitable for deep water areas. Offshore transmission tower structures are subjected to the interaction of environmental loads such as wind, waves, and currents, all of which are significant factors leading to their failure. Therefore, studying the horizontal load characteristics of multi-pile foundations and establishing reasonable and practical analysis methods for them is of great theoretical and practical significance for improving the design level of offshore transmission tower foundations and extending their service life. To compensate for the limitations of theoretical analysis, for important projects, it is necessary to combine indoor model tests to simulate the long-term horizontal cyclic loads on multi-pile foundations for analysis.

[0003] However, current model research still has the problem of excessive loading tonnage of the loading device during model tests. The traditional adjustment method still uses different adjustment holes to fix the lever loading device for adjustment, which has problems such as insufficient accuracy. Therefore, it is urgent to improve the accuracy of the test and the accuracy of the conclusions. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, the present invention provides a continuously adjustable lever loading device.

[0005] The technical solution of the present invention is as follows:

[0006] A stepless adjustable lever loading device includes a loading lever and a model box. The loading lever has a "Z" shaped structure and includes a loading device, a loading beam, and a force transmission beam. The loading device is arranged horizontally, with both ends fixed to a base plate. The base plate is fixedly connected to a slider in the adjusting device. The adjusting device includes a slide rail, which is fixedly installed on a reaction wall and the side wall of the vertically arranged loading beam. One end of the horizontally arranged force transmission beam is fixedly connected to the other side of the loading beam, and the bottom of the loading beam is fixed to the foundation by a fixing seat. The other end of the force transmission beam is fixedly connected to a multi-pile foundation, which is set in the model box. The model box is fixed to the foundation by high-strength bolts.

[0007] Preferably, the adjusting device further includes brackets which are provided with two and symmetrically installed at both ends of the slide rail respectively. A driving device and a driving wheel are provided on the top bracket, and a driven wheel is provided on the bottom bracket; a transmission chain is arranged between the driving wheel and the driven wheel, and a bottom plate is fixedly connected to the transmission chain. The bottom plate is fixed on the slider, and the slider is slidably installed on the slide rail.

[0008] Preferably, the driving device includes a speed regulator, and the bracket arranged at the top of the slide rail is in a "C" shape. The driving wheel is installed in the concave part of the "C" shape, and the speed regulator is installed in the convex part of the "C" shape. The driving wheel and the speed regulator are connected through a wheel shaft passing through the bracket.

[0009] Preferably, one end of the force transmission beam connecting the loading beam is fixedly connected by bolts passing through the connecting plate.

[0010] Preferably, the fixed seat is fixedly installed on the foundation through high-strength bolts.

[0011] Preferably, a force transmission beam spacer is provided at the end of the force transmission beam connecting the multi-pile foundation end. Bolt holes are provided on the spacer. The force transmission beam and the connecting beam of the multi-pile foundation are fixed by bolts, and the bolts pass through the force transmission beam spacer at the end of the force transmission beam and the spacer provided at the multi-pile foundation end.

[0012] Preferably, the multi-pile foundation is fixed in the model box by filling test soil.

[0013] The present invention has the following beneficial effects: The loading lever formed by the loading beam, the loading device and the force transmission beam in the present invention controls and adjusts the magnitude of the force applied to the force transmission beam by setting the adjusting device. Moreover, the adopted adjusting device realizes stepless adjustment, and the loading beam can be stopped at any position within the range of the slide rail where loading is desired, solving the problem that the loading force required in the model test is less than the loading tonnage of common loading equipment, and improving the test accuracy and the accuracy of the conclusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural principle diagram of a stepless adjustment lever loading device of the present invention;

[0015] Figure 2 is a schematic structural diagram of the adjusting device of a stepless adjustment lever loading device of the present invention;

[0016] Figure 3 is a partial structural schematic diagram at position A of a stepless adjustment lever loading device of the present invention.

[0017] The reference signs in the drawings are shown as:

[0018] 1. Fixed seat; 2. Loading beam; 3. Fixed hinge device; 4. Loading device; 5. Force transfer beam; 6. Loading cushion plate; 7. Adjusting device; 71. Slide block; 72. Slide rail; 73. Transmission chain; 74. Axle; 75. Variable speed regulator; 76. Support; 77. Driving wheel; 78. Driven wheel; 8. Bottom plate; 9. Connecting plate; 10. Reaction wall; 11. Model box; 12. Multi-pile foundation; 13. High-strength bolt; 14. Force transfer beam cushion plate; 15. Cushion plate. Specific implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] See Figures 1 to 3 , a stepless adjustment lever loading device, including a loading lever and a model box 11. The loading lever has a "Z" - shaped structure and includes a loading device 4, a loading beam 2 and a force transfer beam 5. The loading device 4 is horizontally arranged, and both ends thereof are fixed on the bottom plate 8. The bottom plate 8 is fixedly connected to the slide block 71 in the adjusting device 7. The adjusting device 7 includes a slide rail 72, and the slide rail 72 is respectively fixedly installed on the reaction wall 10 and the side wall of the vertically arranged loading beam 2. The adjusting device 7 further includes a support 76. There are two supports 76 symmetrically installed at both ends of the slide rail 72. A driving device and a driving wheel 77 are provided on the top support 76, and a driven wheel 78 is provided on the bottom support 76. A transmission chain 73 is provided between the driving wheel 77 and the driven wheel 78. The transmission chain 73 is fixedly connected to the bottom plate 8, and the bottom plate 8 is fixed on the slide block 71. The slide block 71 is slidably installed on the slide rail 72. The driving device includes a variable speed regulator 75, and the support 76 at the top of the slide rail 72 is in a "ji" shape. The driving wheel 77 is installed in the concave part of the "ji" shape, and the variable speed regulator 75 is installed in the convex part of the "ji" shape. The driving wheel 77 and the variable speed regulator 75 are connected through an axle 74 passing through the support 76. The other side of the loading beam 2 is fixedly connected to one end of the horizontally arranged force transfer beam 5. The bottom of the loading beam 2 is fixed on the foundation through a fixed seat 1. The other end of the force transfer beam 5 is fixedly connected to a multi - pile foundation 12. The multi - pile foundation 12 is arranged in the model box 11, and the model box 11 is fixed on the foundation through high - strength bolts 13.

[0021] Furthermore, one end of the force transfer beam 5 connected to the loading beam 2 is fixedly connected through a bolt passing through the connecting plate 9.

[0022] Furthermore, the fixed seat 1 is fixedly installed on the foundation through high - strength bolts 13.

[0023] Furthermore, a load transfer beam backing plate 14 is provided at the end of the load transfer beam 5 connected to the multi-pile foundation 12. Bolt holes are provided on the backing plate 15. The connecting beam between the load transfer beam 5 and the multi-pile foundation 12 is fixed by bolts. The bolts pass through the load transfer beam backing plate 14 at the end of the load transfer beam 5 and the backing plate 15 provided at the end of the multi-pile foundation 12.

[0024] Furthermore, the multi-pile foundation 12 is fixed in the model box 11 by filling the test soil body.

[0025] The working principle of the present invention:

[0026] In the present invention, first, a lifting machine such as a crane is used to hoist the model box 11 in place, and then the model box 11 is fixed to the foundation by high-strength bolts 13. After that, the multi-pile foundation 12 is hoisted into the model box 11 for positioning, and the test soil body is filled and fixed; then the loading beam 2 is installed. The fixed seat 1 is fixed on the foundation by high-strength bolts 13, and then the loading beam 2 is fixed to the fixed hinge support 3 by bolts. The fixed hinge support 3 is fixedly connected to the fixed seat 1 to form a fixed end; next, the slide rails 72 of the adjusting device 7 are installed on the side wall of the vertical loading beam 2 and the reaction wall 10. Brackets 76 are installed at the upper and lower ends of the slide rails 72. A driving device and a driving wheel 77 are provided on the top bracket 76, and a driven wheel 78 is provided on the bottom bracket 76; a transmission chain 73 is provided between the driving wheel 77 and the driven wheel 78. A bottom plate 8 is fixedly connected to the transmission chain 73. The bottom plate 8 is fixed to the slider 71. The slider 71 is slidably installed on the slide rail 72. The driving device includes a speed regulator 75. The bracket 76 at the top of the slide rail 72 is in a "J" shape. The driving wheel 77 is installed in the concave part of the "J" shape, and the speed regulator 75 is installed in the convex part of the "J" shape. The driving wheel 77 and the speed regulator 75 are connected by a wheel shaft 74 passing through the bracket 76; when the speed regulating device 75 is driven, the driving wheel 77 is rotated, and then the driven wheel 78 is driven to move together through the transmission chain 73, so as to control the movement of the slider 71 on the slide rail 72; next, the loading device 4 is installed. The loading device 4 is horizontally arranged, and both ends thereof are fixed to the bottom plate 8. The bottom plate 8 is fixedly connected to the slider 71 in the adjusting device 7; then the load transfer beam 5 is installed. The connecting plate 9 is connected to the bolt hole on the loading beam 2 by bolts, so that the load transfer beam 5 can be fixed to the loading beam 2, and then the load transfer beam 5 is fixed to the connecting beam of the multi-pile foundation 12 by bolts passing through the connecting beam backing plate 14 and the backing plate 15.

[0027] After the entire device is installed, the loading process can begin. The force applied to the loading beam 2 by the loading device 4 is F1, and the force applied to the force transmission beam 5 by the loading beam 2 is F2. The distance between the loading device 4 and the fixed end is X1, and the distance between the force transmission beam 5 and the fixed end is X2. According to the formula: F1*X1=F2*X2, the force F2 applied to the force transmission beam 5 can be calculated. By fixing the loading device 4 at different heights on the loading beam 2 and adjusting the lever arm, different magnitudes of force F2 can be applied to the force transmission beam 5.

[0028] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A continuously adjustable lever loading device, characterized in that: It includes a loading lever and a model box (11), and is characterized in that: the loading lever has a "Z" - shaped structure, including a loading device (4), a loading beam (2) and a force - transmitting beam (5). The loading device (4) is arranged horizontally, and both of its ends are fixed on the bottom plate (8). The bottom plate (8) is fixedly connected to the slider (71) in the adjusting device (7). The adjusting device (7) includes a slide rail (72), and the slide rails (72) are respectively fixedly installed on the reaction wall (10) and the side wall of the vertically - arranged loading beam (2). The other side of the loading beam (2) is fixedly connected to one end of the horizontally - arranged force - transmitting beam (5). The bottom of the loading beam (2) is fixed on the foundation through a fixing base (1). The other end of the force - transmitting beam (5) is fixedly connected to a multi - pile foundation (12). The multi - pile foundation (12) is arranged in the model box (11), and the model box (11) is fixed on the foundation through high - strength bolts (13). The adjusting device (7) further includes a bracket (76). There are two brackets (76) symmetrically installed at both ends of the slide rail (72). A driving device and a driving wheel (77) are provided on the top bracket (76), and a driven wheel (78) is provided on the bottom bracket (76). A transmission chain (73) is arranged between the driving wheel (77) and the driven wheel (78). The bottom plate (8) is fixedly connected to the transmission chain (73). The bottom plate (8) is fixed on the slider (71), and the slider (71) is slidably installed on the slide rail (72).

2. The stepless adjustable lever loading device according to claim 1, characterized in that: The driving device includes a speed - change regulator (75). The bracket (76) at the top of the slide rail (72) is of a "Ji" - shaped structure. The driving wheel (77) is installed in the concave part of the "Ji" - shaped structure, and the speed - change regulator (75) is installed on the convex part of the "Ji" - shaped structure. The driving wheel (77) and the speed - change regulator (75) are connected through a wheel shaft (74) passing through the bracket (76).

3. The continuously adjustable lever loading device according to claim 1, characterized in that: One end of the force - transmitting beam (5) connected to the loading beam (2) is fixedly connected through a bolt passing through a connecting plate (9).

4. The stepless adjustable lever loading device according to claim 1, characterized in that: The fixing base (1) is fixedly installed on the foundation through high - strength bolts (13).

5. The stepless adjustable lever loading device according to claim 1, characterized in that: The end of the force - transmitting beam (5) connected to the multi - pile foundation (12) is provided with a force - transmitting beam cushion plate (14). The cushion plate (15) has bolt holes. The connecting beam between the force - transmitting beam (5) and the multi - pile foundation (12) is fixed by bolts. The bolts pass through the force - transmitting beam cushion plate (14) at the end of the force - transmitting beam (5) and the cushion plate (15) arranged at the end of the multi - pile foundation (12).

6. The continuously adjustable lever loading device according to claim 1, characterized in that: The multi - pile foundation (12) is fixed in the model box (11) by filling the test soil body.

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