Accelerated fatigue test device for acute-angle notch of hot-rolled U-shaped steel sheet pile

Abstract

The utility model discloses a hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device, which belongs to the technical field of test devices, and comprises a base, a hot-rolled U-shaped steel sheet pile, a clamping structure and an experimental power structure, and two bearing brackets are arranged on the left and right of the top of the base; the test power structure comprises a test hydraulic cylinder, a test push block, a spring seat and a reset spring, the test hydraulic cylinder and the spring seat are arranged on the opposite sides of the two bearing supports respectively, the test push block is arranged on an output shaft of the test hydraulic cylinder, and the reset spring is arranged on the side, close to the hot-rolled U-shaped steel sheet pile, of the spring seat. According to the accelerated fatigue test device for the acute-angle notch of the hot-rolled U-shaped steel sheet pile, the test power structure is arranged, the test hydraulic cylinder is started to push the hot-rolled U-shaped steel sheet pile through the test push block, the test push block is reset after the hot-rolled U-shaped steel sheet pile is deformed to a certain extent, and the process is repeated after the hot-rolled U-shaped steel sheet pile is reset through the reset spring. And the fatigue test of the hot-rolled U-shaped steel sheet pile can be realized by repeating the steps.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot rolled U type steel sheet pile acute angle notch acceleration fatigue test device field especially relates to hot rolled U type steel sheet pile acute angle notch acceleration fatigue test device. BACKGROUND

[0002] Hot rolled U type steel sheet pile is also called Larsen steel sheet pile, it is used as a new building material, when building bridge cofferdam, large pipeline laying, temporary ditch excavation, it is used as retaining wall, water retaining wall, sand retaining wall, in the wharf, unloading yard, it is used as retaining wall, retaining wall, dike protection bank etc., plays an important role in engineering, Larsen steel sheet pile does cofferdam not only green, environmental protection and construction speed is fast, construction cost is low, has good waterproof function.

[0003] In order to guarantee the performance of hot rolled U type steel sheet pile, it needs to carry out fatigue test, but the prior art does not have the equipment specially used for the fatigue performance test of hot rolled U type steel sheet pile, so that the fatigue test of hot rolled U type steel cannot be completed, and the test result is prone to deviation error, and the overall experimental period is long. UTILITY MODEL CONTENTS

[0004] In order to solve the problem that the fatigue test of hot rolled U type steel cannot be completed and the test result is prone to deviation error, the utility model provides hot rolled U type steel sheet pile acute angle notch acceleration fatigue test device, and the technical scheme is as follows:

[0005] The hot rolled U type steel sheet pile acute angle notch acceleration fatigue test device includes a base, a hot rolled U type steel sheet pile, a clamping structure and an experimental power structure, the left and right sides of the top of the base are provided with two bearing supports, the clamping structure and the experimental power structure are arranged on the opposite side of the two bearing supports, and the experimental power structure is located at the top of the clamping structure.

[0006] The experimental power structure includes a test hydraulic cylinder, a test push block, a spring seat and a return spring, the test hydraulic cylinder and the spring seat are arranged on the opposite side of the two bearing supports, the test push block is arranged on the output shaft of the test hydraulic cylinder, and the return spring is arranged on the side of the spring seat close to the hot rolled U type steel sheet pile.

[0007] Preferably, the clamping structure includes a clamping hydraulic cylinder, a first clamping block and a second clamping block, the clamping hydraulic cylinder is arranged on the opposite side of the two bearing supports, the first clamping block is arranged on the output shaft of the left clamping hydraulic cylinder, and the second clamping block is arranged on the output shaft of the right clamping hydraulic cylinder.

[0008] The starting test hydraulic cylinder pushes the hot-rolled U-shaped steel sheet pile through the test push block, resets the test push block after the hot-rolled U-shaped steel sheet pile deforms, and repeats the above process after the hot-rolled U-shaped steel sheet pile is reset through the reset spring, so that the fatigue test of the hot-rolled U-shaped steel sheet pile can be realized, the low-temperature fatigue strength test of the hot-rolled U-shaped steel sheet pile can be realized by applying cold air, and the sharp corner notch of the sample can be accelerated by seawater corrosion.

[0009] Preferably, the number of clamping hydraulic cylinders is two groups distributed in left-right symmetry, and the number of clamping hydraulic cylinders in each group is two and distributed in up-down symmetry.

[0010] Preferably, the shapes of the opposite sides of the first clamping block and the second clamping block are respectively matched with the outer side wall and the inner side wall of the hot-rolled U-shaped steel sheet pile, and the first clamping block and the second clamping block are respectively matched with the outer side wall and the inner side wall of the hot-rolled U-shaped steel sheet pile.

[0011] Preferably, the hot-rolled U-shaped steel sheet pile is arranged between the first clamping block and the second clamping block, the left side of the outer surface of the hot-rolled U-shaped steel sheet pile is provided with a sharp corner notch, and the size and shape of the test push block are the same as those of the first clamping block.

[0012] Preferably, the test push block is matched with the outer side wall of the hot-rolled U-shaped steel sheet pile, and the end of the reset spring away from the spring seat is matched with the inner side wall of the hot-rolled U-shaped steel sheet pile.

[0013] Preferably, the outer surface of the bearing support is provided with a reinforcing surrounding beam on the upper side and the lower side.

[0014] Preferably, the top of the base is provided with a fixing nut around.

[0015] The clamping hydraulic cylinder, the first clamping block and the second clamping block can firmly fix the hot-rolled U-shaped steel sheet pile, effectively prevent the hot-rolled U-shaped steel sheet pile from accidentally falling off or sliding, and strengthen the stability of the overall structure.

[0016] Beneficial effects:

[0017] The beneficial effects of the technical scheme of the utility model are as follows:

[0018] 1. The sharp corner notch accelerated fatigue test device for hot-rolled U-shaped steel sheet pile, through the experimental power structure, the starting test hydraulic cylinder pushes the hot-rolled U-shaped steel sheet pile through the test push block, resets the test push block after the hot-rolled U-shaped steel sheet pile deforms, and repeats the above process after the hot-rolled U-shaped steel sheet pile is reset through the reset spring, so that the fatigue test of the hot-rolled U-shaped steel sheet pile can be realized, the low-temperature fatigue strength test of the hot-rolled U-shaped steel sheet pile can be realized by applying cold air, and the sharp corner notch of the sample can be accelerated by seawater corrosion.

[0019] 2、The acute angle notch accelerated fatigue test device of the hot-rolled U-shaped steel sheet pile is firmly fixed through the clamping structure, the clamping hydraulic cylinder, the first clamping block and the second clamping block, can effectively prevent the hot-rolled U-shaped steel sheet pile from falling off or sliding, and strengthens the stability of the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is the overall three-dimensional structure schematic diagram of the hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device of the present application;

[0022] Figure 2 is the front view structure schematic diagram of the hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device of the present application;

[0023] Figure 3 is the top view structure schematic diagram of the hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device of the present application.

[0024] In the figure, 1, base; 2, hot-rolled U-shaped steel sheet pile; 3, bearing support; 4, clamping hydraulic cylinder; 5, first clamping block; 6, second clamping block; 7, test hydraulic cylinder; 8, test push block; 9, spring seat; 10, return spring; 11, reinforcing beam; 12, fixing nut. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0026] As Figures 1-2As shown, the hot-rolled U-shaped steel sheet pile acute angle notch fatigue test device comprises a base 1, a hot-rolled U-shaped steel sheet pile 2, a clamping structure and an experimental power structure, the top of the base 1 is provided with two bearing supports 3 on the left and right, the left side of the outer surface of the hot-rolled U-shaped steel sheet pile 2 is provided with an acute angle notch, the clamping structure and the experimental power structure are arranged on the opposite side of the two bearing supports 3, and the experimental power structure is located on the top of the clamping structure.

[0027] The experimental power structure comprises a test hydraulic cylinder 7, a test push block 8, a spring seat 9 and a return spring 10, the test hydraulic cylinder 7 and the spring seat 9 are arranged on the opposite side of the two bearing supports 3, the test push block 8 is arranged on the output shaft of the test hydraulic cylinder 7, the test push block 8 is attached to the outer side wall of the hot-rolled U-shaped steel sheet pile 2, and the return spring 10 is arranged on the side of the spring seat 9 close to the hot-rolled U-shaped steel sheet pile 2, and the end of the return spring 10 away from the spring seat 9 is attached to the inner side wall of the hot-rolled U-shaped steel sheet pile 2.

[0028] In this embodiment, the experimental power structure can cyclically reciprocate to perform fatigue test on the hot-rolled U-shaped steel sheet pile 2.

[0029] As shown in the figure, Figures 1-2 The clamping structure comprises a clamping hydraulic cylinder 4, a first clamping block 5 and a second clamping block 6, the clamping hydraulic cylinder 4 is arranged on the opposite side of the two bearing supports 3, the first clamping block 5 is arranged on the output shaft of the left clamping hydraulic cylinder 4, the size and shape of the test push block 8 are the same as those of the first clamping block 5, the second clamping block 6 is arranged on the output shaft of the right clamping hydraulic cylinder 4, the hot-rolled U-shaped steel sheet pile 2 is arranged between the first clamping block 5 and the second clamping block 6, the shapes of the opposite sides of the first clamping block 5 and the second clamping block 6 are respectively matched with the outer side wall and the inner side wall of the hot-rolled U-shaped steel sheet pile 2, and the first clamping block 5 and the second clamping block 6 are respectively attached to the outer side wall and the inner side wall of the hot-rolled U-shaped steel sheet pile 2.

[0030] Specifically, the number of clamping hydraulic cylinders 4 is two groups distributed symmetrically left and right, and the number of clamping hydraulic cylinders 4 in each group is two and is distributed up and down, and the two groups of clamping hydraulic cylinders 4 can make the clamping effect more firm and stable.

[0031] In this embodiment, the clamping structure can firmly fix the hot-rolled U-shaped steel sheet pile 2, and can effectively prevent the hot-rolled U-shaped steel sheet pile 2 from accidentally falling off or sliding.

[0032] As shown in the figure, Figures 1-3 The outer surface of the bearing support 3 is provided with a reinforcing surrounding beam 11 on the upper and lower sides, the reinforcing surrounding beam 11 surrounds the outer surface of the bearing support 3 for one turn, and the top of the base 1 is provided with a fixed nut 12 around.

[0033] In the embodiment, the reinforcing surrounding beam 11 strengthens the stability of the bearing support 3 structure, and the fixing nut 12 facilitates the mounting and fixing of the base 1.

[0034] The use method of the utility model is as follows:

[0035] The hot-rolled U-shaped steel sheet pile 2 is moved to between the first clamping block 5 and the second clamping block 6, and the first clamping block 5 and the test push block 8 are on the same horizontal line with the hot-rolled U-shaped steel sheet pile 2, four clamping hydraulic cylinders 4 are started to drive the first clamping block 5 and the second clamping block 6 to move to the opposite side, until the fixing of the hot-rolled U-shaped steel sheet pile 2 is completed, the test hydraulic cylinder 7 is started to push the hot-rolled U-shaped steel sheet pile 2 through the test push block 8 after the hot-rolled U-shaped steel sheet pile 2 is fixed, the test push block 8 is reset after the hot-rolled U-shaped steel sheet pile 2 deforms, the above process is repeated after the hot-rolled U-shaped steel sheet pile 2 is reset through the reset spring 10, and the fatigue test of the hot-rolled U-shaped steel sheet pile 2 can be realized through the reciprocating movement, cold wind can be applied in the above process according to the need to realize the low-temperature fatigue strength test of the hot-rolled U-shaped steel sheet pile 2, and the sample acute angle notch accelerated corrosion is realized through seawater corrosion.

[0036] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, and the utility model can be changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A hot-rolled U-shaped steel sheet pile sharp corner notch accelerated fatigue test device, characterized by, The utility model relates to a hot-rolled U-shaped steel sheet pile test device, including: a base (1), hot-rolled U-shaped steel sheet piles (2), clamping structures and experimental power structures, two bearing supports (3) are arranged on the top of the base (1) left and right, the clamping structure and experimental power structure are all arranged on the opposite side of two bearing supports (3), and the experimental power structure is located on the top of the clamping structure; the experimental power structure includes test hydraulic cylinders (7), test push blocks (8), spring seats (9) and return springs (10), the test hydraulic cylinders (7) and spring seats (9) are arranged on the opposite side of two bearing supports (3) respectively, the test push block (8) is arranged on the output shaft of the test hydraulic cylinder (7), and the return spring (10) is arranged on the side of the spring seat (9) close to the hot-rolled U-shaped steel sheet pile (2).

2. The hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device according to claim 1, characterized by the clamping structure includes clamping hydraulic cylinders (4), first clamping blocks (5) and second clamping blocks (6), the clamping hydraulic cylinders (4) are arranged on the opposite side of two bearing supports (3), the first clamping block (5) is arranged on the output shaft of the left clamping hydraulic cylinder (4), and the second clamping block (6) is arranged on the output shaft of the right clamping hydraulic cylinder (4).

3. The hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device according to claim 2, characterized by the number of clamping hydraulic cylinders (4) is two groups of left-right symmetrical distribution, and the number of clamping hydraulic cylinders (4) in each group is two and is arranged in an upper and lower distribution.

4. The hot-rolled U-shaped sheet pile acute notch accelerated fatigue test device according to claim 2, characterized by the shape of the opposite side of the first clamping block (5) and the second clamping block (6) is adapted to the outer side wall and the inner side wall of the hot-rolled U-shaped steel sheet pile (2) respectively, and the first clamping block (5) and the second clamping block (6) are attached to the outer side wall and the inner side wall of the hot-rolled U-shaped steel sheet pile (2) respectively.

5. The hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device according to claim 4, characterized by the hot-rolled U-shaped steel sheet pile (2) is arranged between the first clamping block (5) and the second clamping block (6), a sharp corner notch is arranged on the left side of the outer surface of the hot-rolled U-shaped steel sheet pile (2), and the size and shape of the test push block (8) are same as those of the first clamping block (5).

6. The hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device according to claim 1, characterized by the test push block (8) is attached to the outer side wall of the hot-rolled U-shaped steel sheet pile (2), and one end of the return spring (10) away from the spring seat (9) is attached to the inner side wall of the hot-rolled U-shaped steel sheet pile (2).

7. The hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device according to claim 1, characterized by reinforcing beams (11) are arranged on the upper and lower sides of the outer surface of the bearing support (3), and the reinforcing beams (11) surround the outer surface of the bearing support (3) once.

8. The hot-rolled U-shaped steel sheet pile acute angle notch accelerated fatigue test device according to claim 1, characterized by fixed nuts (12) are arranged on the top of the base (1) around.

Images