A bridge guardrail impact testing device

Abstract

The application discloses a bridge guardrail impact test device, and relates to the technical field of bridge guardrail impact test, which comprises a base, a guardrail fixing mechanism, a first angle adjusting assembly for horizontal direction adjustment, a second angle adjusting assembly for vertical direction left-right adjustment, a third angle adjusting assembly for vertical direction front-back adjustment and the guardrail fixing mechanism for quick installation and fixation. The guardrail seat is quickly installed and fixed through the fixing piece positioning section, the locking assembly is locked, the strength of the locking of the sliding section of the fixing piece is increased through the reinforcing assembly, the first, second and third angle adjusting assemblies are adjusted to simulate the situation of the vehicle colliding with the guardrail at different angles, and the horizontal angle of the guardrail installation assembly is adjusted to simulate the situation of the guardrail installed on the bridge with a slope being collided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge guardrail impact test, and particularly relates to a bridge guardrail impact test device. BACKGROUND

[0002] Bridge guardrail impact test is an important test for evaluating the safety performance of bridge guardrails, and the purpose is to verify whether the guardrail can effectively protect pedestrians and vehicles in the case of accidental vehicle impact, prevent vehicles from falling off the bridge or running out of the road. Before the test, the test angle of the guardrail is usually specified, and the position and direction of the test vehicle are accurately set to ensure the authenticity of the test results, and then whether the guardrail meets the safety standards is judged according to the test results.

[0003] At present, in the process of bridge guardrail impact test, the situation of the guardrail being impacted on the bridge with slope cannot be simulated, and the test results are not real enough. Secondly, the vehicle impact angle needs to be adjusted during the test to simulate the situation of the vehicle impacting the guardrail at different angles. Different impact angles will have different requirements for the performance of the guardrail. However, the unmanned driving technology is used in the impact test, and it is difficult to adjust the angle of the vehicle, and the size of the test site is required to be high. Furthermore, in order to ensure the stability of the test guardrail during the bridge guardrail impact test and reduce the influence of loose installation on the test results, the bolts need to be tightened one by one to fix the guardrail, which is complicated and has low disassembly and assembly efficiency.

[0004] Therefore, in order to improve the authenticity of the test results and improve the efficiency of disassembly and angle adjustment, the present application provides a bridge guardrail impact test device. SUMMARY

[0005] The present application aims at solving the problems in the prior art and provides a bridge guardrail impact test device.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A bridge guardrail impact test device, including a base and a guardrail fixing mechanism, the top wall of the base is provided with a first angle adjusting assembly for horizontal direction adjustment, the first angle adjusting assembly includes a first adjusting slot, and the middle of the top wall of the base is provided with a first adjusting slot, and the inside of the first adjusting slot is rotatably connected with a first adjusting shaft, the top wall of the first adjusting shaft is fixedly connected with a first adjusting seat, and the top wall of the first adjusting seat is provided with a second angle adjusting assembly for vertical direction left and right adjustment, the top wall of the second angle adjusting assembly is provided with a third angle adjusting assembly for vertical direction front and back adjustment, and the top wall of the third angle adjusting assembly is provided with a test guardrail, and the test guardrail includes a railing seat, the top wall of the third angle adjusting assembly is symmetrically connected with the railing seat, and the middle top wall of the third angle adjusting assembly is provided with an electric push rod; the top wall of the electric push rod is provided with a guardrail fixing mechanism for quick installation and fixation, and the guardrail fixing mechanism includes a locking assembly for locking and a reinforcing assembly for reinforcing locking, the locking assembly includes a locking piece, and the inside of the railing seat is slidably penetrated by the locking piece from front to back; the top wall of the base is provided with an angle limiting mechanism one, and the angle limiting mechanism one includes a first limiting assembly and a second limiting assembly, and the outer wall of the third angle adjusting assembly is provided with an angle limiting mechanism two for third angle limiting.

[0008] In the above-mentioned bridge guardrail impact test device, the second angle adjusting assembly includes a second adjusting slot, the middle of the top wall of the first adjusting seat is provided with a second adjusting slot, and the front and rear side walls of the first adjusting seat are rotatably connected with a second adjusting shaft, the outer wall of the second adjusting slot is rotatably connected with a second adjusting seat, and the bottom of the second adjusting seat is provided with a circular arc block with an upward axis extending forward and backward, and the second adjusting shaft is fixedly penetrated in the inside of the circular arc block of the second adjusting seat from front to back.

[0009] In the above-mentioned bridge guardrail impact test device, the third angle adjusting assembly includes a third adjusting slot, and the top wall of the second adjusting seat is provided with a third adjusting slot, the inside of the third adjusting slot is rotatably connected with a third adjusting seat, and the bottom of the third adjusting seat is provided with a circular arc block with an upward axis extending left and right, the inside of the third adjusting seat is fixedly penetrated with a third adjusting shaft left and right, and the two ends of the third adjusting shaft are rotatably connected with the left and right side walls of the third adjusting slot respectively, and the top wall of the third adjusting seat is fixedly provided with four positioning rods in a matrix shape.

[0010] In the bridge guardrail impact test device, the guardrail fixing mechanism comprises a sliding seat, and the top wall of the electric push rod is fixed with the sliding seat, the left and right side walls of the sliding seat are symmetrically and slidably connected with fixing pieces, the fixing pieces are composed of sliding sections and positioning sections, the positioning sections of the fixing pieces are provided with positioning holes, the positioning holes are matched with corresponding positioning rods, the bottom walls of the positioning sections of the fixing pieces are fixed with four positioning keys in a matrix shape, and the positioning keys are in clamping connection with corresponding guardrail seats.

[0011] In the bridge guardrail impact test device, the locking piece is composed of a horizontal plate and three round rods fixed on the rear side of the horizontal plate from left to right at equal distances, the three round rods of the locking piece are slidably penetrated through corresponding guardrail seats and corresponding positioning keys, the middle round rods of the three round rods of the locking piece are slidably penetrated through corresponding positioning rods, and the rear ends of the three round rods of the locking piece are slidably penetrated through and connected with a first bolt.

[0012] In the bridge guardrail impact test device, the reinforcing assembly comprises a sliding rail, the top wall of the third adjusting seat is symmetrically provided with a sliding rail about the electric push rod, and the outer wall of the sliding rail is symmetrically and slidably connected with a first reinforcing block and a second reinforcing block, the first reinforcing block is in clamping connection with the corresponding second reinforcing block, and the connecting position of the first reinforcing block and the corresponding second reinforcing block is slidably penetrated through a second bolt.

[0013] In the bridge guardrail impact test device, the outer wall of the first angle adjusting assembly is provided with a first limiting assembly for first angle limiting, the first limiting assembly comprises a positioning arc-shaped plate, the front of the first adjusting shaft is provided with the positioning arc-shaped plate, and the left and right ends of the positioning arc-shaped plate are fixedly connected to the outer wall of the base, the side wall of the first adjusting shaft is in clamping connection with a first positioning strip, the first positioning strip is slidably penetrated into the inside of the positioning arc-shaped plate, the inside of the base is provided with an adjusting track, and the inside of the adjusting track is slidably connected with an adjusting ring, the adjusting ring is composed of a circular ring section, a horizontal rod on the top wall of the circular ring section, and vertical rods slidably arranged in the horizontal rod, and the vertical rods of the adjusting ring are slidably penetrated into the overlapping position of the positioning arc-shaped plate and the first positioning strip.

[0014] In the bridge guardrail impact test device, the outer wall of the second angle adjusting assembly is provided with a second limiting assembly for second angle limiting, and the second limiting assembly comprises a first limiting groove, the front end of the second adjusting shaft is uniformly provided with the first limiting groove in the circumferential direction, the inside of the first limiting groove located directly above the second adjusting shaft is in clamping connection with a second positioning strip, the top wall of the second positioning strip is fixed with a first inverted U-shaped plate with an opening downward, the bottom wall of the first inverted U-shaped plate is symmetrically provided with a first mounting groove, the positioning arc-shaped plate is in clamping connection with the inside of the first mounting groove, and the horizontal rod of the adjusting ring is arranged between the left and right side walls of the first inverted U-shaped plate.

[0015] In the aforementioned bridge railing impact testing device, the angle limiting mechanism includes a second limiting groove. The left and right ends of the third adjusting shaft are both uniformly provided with second limiting grooves along the circumferential direction. A third positioning strip is engaged with the inside of the second limiting groove located directly above the third adjusting shaft. A second inverted U-shaped plate with an opening facing downward is fixed to the top wall of the third positioning strip. A second mounting groove is provided on the side wall of the second inverted U-shaped plate away from the third adjusting seat.

[0016] In the aforementioned bridge railing impact testing device, the left and right side walls of the second adjusting seat are fixed with limiting seats, and the inside of the limiting seats is rotatably connected with an operating rod. The bottom wall of the second inverted U-shaped plate is engaged with the top wall of the limiting seat. The operating rod is composed of three crossbars and two U-shaped plates connected end to end in an alternating manner, and the two U-shaped plates of the operating rod are engaged with each other in the second mounting groove.

[0017] Compared with existing technologies, the advantages of this invention are:

[0018] This invention firstly uses a fixing component to quickly install and fix the railing seat, followed by a locking component, and then reinforces the component to increase the strength of the locking of the sliding section of the fixing component. Secondly, by adjusting the horizontal angle of the test railing, it simulates the scenario of a vehicle colliding with the railing at different angles. The vertical adjustment of the test railing, both left-right and forward-backward, simulates the scenario of a railing installed on a sloping bridge being impacted, improving the diversity of test results and making the test scenario more realistic and the test structure more authentic. Furthermore, a first positioning strip locks the first adjusting shaft, a second positioning strip locks the second adjusting seat, and an adjusting ring further locks the first adjusting shaft and the second adjusting seat. A third positioning strip locks the third adjusting seat, and the two U-shaped plates of the operating rod increase the locking strength of the third adjusting seat, effectively ensuring stability during the testing process. Attached Figure Description

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of a bridge railing impact testing device proposed in this invention.

[0021] Figure 2 for Figure 1 A structural diagram from another angle.

[0022] Figure 3 This is a schematic diagram of the test railing of a bridge railing impact testing device proposed in this invention.

[0023] Figure 4A first angle adjusting assembly, a second angle adjusting assembly and a third angle adjusting assembly of a bridge guardrail impact testing device.

[0024] Figure 5 A fixing part of a bridge guardrail impact testing device.

[0025] Figure 6 A locking assembly and a reinforcing assembly of a bridge guardrail impact testing device.

[0026] Figure 7 An angle limiting mechanism one of a bridge guardrail impact testing device.

[0027] Figure 8 A structure schematic view of Figure 1 An enlarged structure schematic view of A in the figure.

[0028] Figure 9 An angle limiting mechanism two of a bridge guardrail impact testing device.

[0029] In the figure: 1, base; 2, first angle adjusting assembly; 21, first adjusting groove; 22, first adjusting shaft; 23, first adjusting seat; 3, second angle adjusting assembly; 31, second adjusting groove; 32, second adjusting seat; 33, second adjusting shaft; 4, third angle adjusting assembly; 41, third adjusting groove; 42, third adjusting seat; 43, third adjusting shaft; 44, positioning rod; 5, testing guardrail; 51, guardrail seat; 6, electric push rod; 7, guardrail fixing mechanism; 71, sliding seat; 72, fixing part; 73, positioning hole; 74, positioning key; 75, locking assembly; 751, locking part; 752, first bolt; 76, reinforcing assembly; 761, sliding rail; 762, first reinforcing block; 763, second reinforcing block; 764, second bolt; 8, angle limiting mechanism one; 81, first limiting assembly; 811, positioning arc-shaped plate; 812, first positioning strip; 813, adjusting track; 814, adjusting ring; 82, second limiting assembly; 821, first limiting groove; 822, first inverted U-shaped plate; 823, second positioning strip; 824, first mounting groove; 9, angle limiting mechanism two; 91, second limiting groove; 92, second inverted U-shaped plate; 93, third positioning strip; 94, second mounting groove; 95, limiting seat; 96, operating rod. DETAILED DESCRIPTION

[0030] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0031] With reference to Figures 1 to 3 And Figure 5 A bridge guardrail impact test device, comprising a base 1 and a guardrail fixing mechanism 7, the top wall of the base 1 is provided with a first angle adjusting assembly 2 for horizontal direction adjustment, the top wall of the first angle adjusting assembly 2 is provided with a second angle adjusting assembly 3 for vertical direction left-right adjustment, the top wall of the second angle adjusting assembly 3 is provided with a third angle adjusting assembly 4 for vertical direction front-back adjustment, the top wall of the third angle adjusting assembly 4 is provided with a test guardrail 5, the test guardrail 5 comprises a rail seat 51, the top wall of the third angle adjusting assembly 4 is symmetrically connected with the rail seat 51, and the middle top wall of the third angle adjusting assembly 4 is provided with an electric push rod 6; the top wall of the electric push rod 6 is provided with the guardrail fixing mechanism 7 for quick installation and fixation, the guardrail fixing mechanism 7 comprises a locking assembly 75 for locking and a reinforcing assembly 76 for reinforcing locking, the top wall of the base 1 is provided with an angle limiting mechanism one 8, the angle limiting mechanism one 8 comprises a first limiting assembly 81 and a second limiting assembly 82, and the outer wall of the third angle adjusting assembly 4 is provided with an angle limiting mechanism two 9 for third angle limiting.

[0032] First, the base 1 is installed at the test position, the rail seat 51 is inserted into the top wall of the third angle adjusting assembly 4, the guardrail fixing mechanism 7 is adjusted to the left and right sides, the output end of the electric push rod 6 is lowered to drive the guardrail fixing mechanism 7 to move from the initial high position to the third angle adjusting assembly 4, so that the bottom wall of the guardrail fixing mechanism 7 presses the top wall of the rail seat 51 to block the upward movement of the rail seat 51, the locking assembly 75 can simultaneously connect the test guardrail 5 and the third angle adjusting assembly 4, lock the positions of the two ends of the guardrail fixing mechanism 7, further strengthen the connection between the test guardrail 5 and the third angle adjusting assembly 4, the reinforcing assembly 76 connects the guardrail fixing mechanism 7 and the third angle adjusting assembly 4, and the middle position of the guardrail fixing mechanism 7 is reinforced and locked, thereby enhancing the stability of the test guardrail 5 installation and ensuring the accuracy of the test data.

[0033] By adjusting the rotation angle of the first angle adjusting assembly 2 in the horizontal direction, the situation when the vehicle collides with the guardrail at different angles is simulated, which overcomes the high requirement for the size of the test site; by adjusting the swing angle of the second angle adjusting assembly 3 in the vertical direction left and right, and by adjusting the swing angle of the third angle adjusting assembly 4 in the vertical direction forward and backward, the situation when the guardrail on the bridge with slope is collided is simulated, so as to increase the test authenticity and solve the problem that the bridge guardrail can only be tested under flat conditions.

[0034] By adjusting the first limiting assembly 81 to lock the adjustment angle of the first angle adjusting assembly 2, by adjusting the second limiting assembly 82 to lock the adjustment angle of the second angle adjusting assembly 3, and by adjusting the angle limiting mechanism two 9 to lock the adjustment angle of the third angle adjusting assembly 4, it is ensured that the collision test can be carried out at the set angle.

[0035] Referring to Figure 1 and Figure 4 , the first angle adjusting assembly 2 comprises a first adjusting groove 21, and the top wall of the base 1 is provided with the first adjusting groove 21 in the middle, the first adjusting groove 21 is rotatably connected with a first adjusting shaft 22 inside, and the top wall of the first adjusting shaft 22 is fixedly connected with a first adjusting seat 23.

[0036] The second angle adjusting assembly 3 comprises a second adjusting groove 31, and the top wall of the first adjusting seat 23 is provided with the second adjusting groove 31 in the middle, the front and rear side walls of the first adjusting seat 23 are rotatably connected with a second adjusting shaft 33, the outer wall of the second adjusting groove 31 is rotatably connected with a second adjusting seat 32, and the bottom of the second adjusting seat 32 is provided with a circular arc block with an upward axis extending forward and backward, and the second adjusting shaft 33 is fixedly penetrated into the circular arc block inside the second adjusting seat 32 from front to back.

[0037] The third angle adjusting assembly 4 comprises a third adjusting groove 41, and the top wall of the second adjusting seat 32 is provided with the third adjusting groove 41, the inside of the third adjusting groove 41 is rotatably connected with a third adjusting seat 42, the bottom of the third adjusting seat 42 is provided with a circular arc block with an upward axis extending left and right, the inside of the third adjusting seat 42 is fixedly penetrated with a third adjusting shaft 43 left and right, the two ends of the third adjusting shaft 43 are rotatably connected with the left and right side walls of the third adjusting groove 41 respectively, and the top wall of the third adjusting seat 42 is fixedly provided with four positioning rods 44 in a matrix shape.

[0038] Referring to Figure 1 , Figure 5 and Figure 6The guardrail fixing mechanism 7 comprises a sliding seat 71, the top wall of the electric push rod 6 is fixed with the sliding seat 71, the left and right side walls of the sliding seat 71 are symmetrically and slidably connected with fixing pieces 72, the fixing pieces 72 are composed of sliding sections and positioning sections, the positioning sections of the fixing pieces 72 are provided with positioning holes 73, the positioning holes 73 are matched with the corresponding positioning rods 44, the bottom walls of the positioning sections of the fixing pieces 72 are fixed with four positioning keys 74 in a matrix shape, and the positioning keys 74 are clampedly connected with the corresponding guardrail seats 51.

[0039] With reference to Figure 5 and Figure 6 The locking assembly 75 comprises locking pieces 751, the inside of the guardrail seat 51 is slidably penetrated by the locking pieces 751 from front to back, the locking pieces 751 are composed of a horizontal plate and three round rods fixed on the rear side of the horizontal plate from left to right at equal distances; the three round rods of the locking pieces 751 are slidably penetrated through the corresponding guardrail seats 51 and the corresponding positioning keys 74, the middle round rods of the three round rods of the locking pieces 751 are slidably penetrated through the corresponding positioning rods 44, and the rear ends of the three round rods of the locking pieces 751 are slidably penetrated through and connected with a first bolt 752.

[0040] The reinforcing assembly 76 comprises sliding rails 761, the top wall of the third adjusting seat 42 is symmetrically provided with the sliding rails 761 at the left and right sides of the electric push rod 6 as the center, the outer walls of the sliding rails 761 are symmetrically and slidably connected with first reinforcing blocks 762 and second reinforcing blocks 763, the first reinforcing blocks 762 are clampedly connected with the corresponding second reinforcing blocks 763, and the connecting positions of the first reinforcing blocks 762 and the corresponding second reinforcing blocks 763 are slidably penetrated through and connected with a second bolt 764.

[0041] The base 1 is installed at a test position, the guardrail seat 51 is inserted into the outer wall of the positioning rod 44, the positioning rod 44 positions the guardrail seat 51, then the sliding sections of the fixing pieces 72 are slid out to the left and right sides of the sliding seat 71, the output end of the electric push rod 6 is lowered to drive the sliding seat 71 to move downwards from the initial high position and close to the third adjusting seat 42, until the positioning keys 74 are clamped downwards into the inside of the guardrail seat 51, so that the position deviation of the guardrail seat 51 is prevented, the positioning sections of the fixing pieces 72 are tightly blocked against the top wall of the guardrail seat 51 to prevent the guardrail seat 51 from moving upwards, meanwhile, the positioning rods 44 are clamped into the corresponding positioning holes 73, so that the position of the positioning sections of the fixing pieces 72 is limited.

[0042] Then, the locking pieces 751 are inserted into the inside of the guardrail seat 51 from front to back, the round rods of the locking pieces 751 are slidably penetrated through the positioning rods 44, the guardrail seats 51 and the positioning keys 74, the rear ends of the round rods of the locking pieces 751 are penetrated through and locked by the first bolt 752, and nuts are threadedly installed at the end portions of the first bolt 752, so that the positioning rods 44, the guardrail seats 51 and the positioning sections of the fixing pieces 72 are quickly and tightly connected, the stability of the installation of the test guardrail 5 is enhanced, and the installation efficiency is improved.

[0043] Then, the first reinforcing block 762 and the corresponding second reinforcing block 763 are slidably installed from the front and rear side slide rails 761 of the third adjusting seat 42. The first reinforcing block 762 and the second reinforcing block 763 provide front and rear support and upper and lower limit for the sliding section of the corresponding fixing member 72. After the first reinforcing block 762 and the second reinforcing block 763 are engaged, the second pin 764 is inserted into the engagement position of the first reinforcing block 762 and the second reinforcing block 763 to lock them. Through the cooperation of the first reinforcing block 762 and the second reinforcing block 763, the locking strength of the sliding section of the fixing member 72 can be increased.

[0044] Reference Figure 1 , Figures 7 to 9 The outer wall of the first angle adjustment component 2 is provided with a first limiting component 81 for limiting the first angle. The first limiting component 81 includes a positioning arc plate 811. The positioning arc plate 811 is provided in front of the first adjustment shaft 22. The left and right ends of the positioning arc plate 811 are fixedly connected to the outer wall of the base 1. The side wall of the first adjustment shaft 22 is engaged with a first positioning strip 812. The first positioning strip 812 slides through the inside of the positioning arc plate 811. An adjustment track 813 is provided inside the base 1. An adjustment ring 814 is slidably connected inside the adjustment track 813. The adjustment ring 814 is composed of a circular segment, a horizontal bar on the top wall of the circular segment, and a vertical bar that slides up and down inside the horizontal bar. The vertical bar of the adjustment ring 814 slides through the overlapping part of the positioning arc plate 811 and the first positioning strip 812.

[0045] The outer wall of the second angle adjustment component 3 is provided with a second limiting component 82 for limiting the second angle. The second limiting component 82 includes a first limiting groove 821. The front end of the second adjustment shaft 33 is evenly provided with the first limiting groove 821 along the circumferential direction. The first limiting groove 821 located directly above the second adjustment shaft 33 is engaged with a second positioning strip 823. The top wall of the second positioning strip 823 is fixed with a first inverted U-shaped plate 822 with its opening facing downward. The bottom wall of the first inverted U-shaped plate 822 is symmetrically provided with first mounting grooves 824. The positioning arc plate 811 is engaged with the inside of the first mounting groove 824. The crossbar of the adjustment ring 814 is provided between the left and right side walls of the first inverted U-shaped plate 822.

[0046] Reference Figure 1 and Figure 9The angle limiting mechanism two 9 comprises a second limiting groove 91, the left and right ends of the third adjusting shaft 43 are uniformly provided with the second limiting groove 91 in the circumferential direction, the inside of the second limiting groove 91 located directly above the third adjusting shaft 43 is hingedly connected with a third positioning strip 93, the top wall of the third positioning strip 93 is fixed with a second inverted U-shaped plate 92 opening downward, and the side wall of the second inverted U-shaped plate 92 away from the third adjusting seat 42 is provided with a second mounting groove 94; the left and right side walls of the second adjusting seat 32 are fixed with a limiting seat 95, the inside of the limiting seat 95 is rotatably connected with an operating rod 96, the bottom wall of the second inverted U-shaped plate 92 is hingedly connected to the top wall of the limiting seat 95, and the operating rod 96 is connected in an alternating manner by three cross rods and two U-shaped plates, and the two U-shaped plates of the operating rod 96 are hingedly connected in the second mounting groove 94.

[0047] With reference to Figure 1 , Figure 4 , Figure 7 and Figure 9 , the first adjusting shaft 22 is adjusted to a suitable angle in the first adjusting groove 21, the first adjusting seat 23 drives the top-mounted test guardrail 5 to adjust the horizontal angle, the positioning arc-shaped plate 811 is fixed on the base 1, the first positioning strip 812 is inserted into the inside of the positioning arc-shaped plate 811 and the first adjusting shaft 22 from front to back, and the first positioning strip 812 plays a role in locking the angle of the first adjusting shaft 22.

[0048] The second adjusting seat 32 is adjusted to a suitable angle by the second adjusting shaft 33 on the outer wall of the second adjusting groove 31, the second adjusting seat 32 drives the top-mounted test guardrail 5 to adjust left and right in the vertical direction, simulates the state of the guardrail installed on the bridge with an arch-shaped fluctuation in the length direction, then the first inverted U-shaped plate 822 is moved downward to drive the second positioning strip 823 to be hingedly connected in the inside of the first limiting groove 821, the first mounting groove 824 is hingedly connected to the outer wall of the positioning arc-shaped plate 811, the first inverted U-shaped plate 822 is connected to the second adjusting shaft 33 and the positioning arc-shaped plate 811, and plays a role in locking the angle of the second adjusting seat 32.

[0049] It should be noted that, since the amplitude of the arch-shaped fluctuation of the bridge in the length direction in actual life is not large, the rotating amplitude of the second adjusting seat 32 in the application is also small, and after the second adjusting seat 32 is rotated to a suitable angle and locked, a pad can be inserted between the first adjusting seat 23 and the second adjusting seat 32 to further increase the stability of the second adjusting seat 32.

[0050] The outer wall of the positioning arc-shaped plate 811 is provided with a plurality of hole positions matched with the first positioning strip 812, the first positioning strip 812 locks the first adjusting shaft 22, the first positioning strip 812 and the first inverted U-shaped plate 822 are kept on the same straight line, the adjusting ring 814 circular ring segment slides inside the adjusting track 813 to adapt to the position change of the positioning arc-shaped plate 811 and the second positioning strip 823, after the first inverted U-shaped plate 822 locks the second adjusting seat 32, the horizontal rod of the adjusting ring 814 is tightly attached to the inner walls on the left and right sides of the first inverted U-shaped plate 822, which can limit the position of the second positioning strip 823, the vertical rod of the adjusting ring 814 is inserted and slides into the connection between the positioning arc-shaped plate 811 and the first positioning strip 812, which can limit the position of the first positioning strip 812, so as to further realize the locking of the first adjusting shaft 22 and the second adjusting seat 32. It should be noted that the bottom of the base 1 is a detachable assembly structure to facilitate the installation of the adjusting ring 814.

[0051] The third adjusting seat 42 is adjusted to a suitable angle by rotating in the third adjusting groove 41 through the third adjusting shaft 43, the third adjusting seat 42 drives the top-mounted test guardrail 5 to adjust vertically forward and backward, simulates the state of the guardrail installed on the bridge with arc-shaped undulation in the width direction, and drives the third positioning strip 93 to be clamped and connected inside the second limiting groove 91 by the second inverted U-shaped plate 92, the bottom of the second inverted U-shaped plate 92 is clamped into the top wall of the limiting seat 95, the third positioning strip 93 limits the position of the third adjusting seat 42, the horizontal rod of the operating rod 96 is rotated, and the two U-shaped plates of the operating rod 96 are driven from the horizontal state to the vertical state, the two U-shaped plates of the operating rod 96 are clamped into the second mounting groove 94, the second inverted U-shaped plate 92 is locked, the locking strength of the third adjusting seat 42 is increased, the third positioning strip 93 is prevented from being separated from the second limiting groove 91 due to excessive upward movement of the second inverted U-shaped plate 92, and movement of the third adjusting seat 42 during testing is prevented.

[0052] The specific operation steps of the bridge guardrail impact test device are as follows:

[0053] First, install the base 1 at the test position, insert the guardrail seat 51 into the outer wall of the positioning rod 44, drive the sliding seat 71 to move by moving downward through the output end of the electric push rod 6, and then drive the positioning rod 44 to be clamped into the corresponding positioning hole 73, limit the position of the positioning section of the fixing part 72, insert the locking part 751 into the inside of the guardrail seat 51 from front to back, increase the stability of the test guardrail 5 installation, and then slide the first reinforcing block 762 and the corresponding second reinforcing block 763 from the front and back sides of the third adjusting seat 42 to the slide rail 761, respectively supporting the sliding section of the corresponding fixing part 72 from front to back and limiting the upper and lower positions, which can increase the locking strength of the sliding section of the fixing part 72.

[0054] The first adjusting seat 23 drives the top-mounted test guardrail 5 to adjust the horizontal angle, helps to simulate the situation when the vehicle collides with the guardrail at different angles, and overcomes the high requirement for the size of the test site. The second adjusting seat 32 drives the top-mounted test guardrail 5 to adjust left and right in the vertical direction. The third adjusting seat 42 drives the top-mounted test guardrail 5 to adjust forward and backward in the vertical direction, so as to simulate the situation when the guardrail installed on the bridge with slope is collided.

[0055] The first positioning strip 812 is inserted into the inside of the positioning arc-shaped plate 811 and the first adjusting seat 23 from front to back. The first inverted U-shaped plate 822 drives the second positioning strip 823 to be clamped and mounted in the inside of the first limiting groove 821. The first mounting groove 824 is clamped on the outer wall of the positioning arc-shaped plate 811. The adjusting ring 814 transverse rod limits the position of the second positioning strip 823. The adjusting ring 814 vertical rod can limit the position of the first positioning strip 812. The third positioning strip 93 limits the position of the third adjusting seat 42. The two U-shaped plates of the operating rod 96 are clamped into the inside of the second mounting groove 94, and the second inverted U-shaped plate 92 is locked.

[0056] After the positions of the first adjusting seat 23, the second adjusting seat 32 and the third adjusting seat 42 are locked, the collision test can be started. The test vehicle collides with the guardrail at a set speed. After the collision, it is detected whether the guardrail is damaged, and then it is judged whether the anti-collision ability of the guardrail is qualified.

[0057] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A bridge guardrail impact testing apparatus comprising a base and a guardrail securing mechanism, characterised in that, The top wall of the base is provided with a first angle adjusting assembly for horizontal direction adjustment, the first angle adjusting assembly comprises a first adjusting slot, and a first adjusting slot is arranged in the middle of the top wall of the base, and a first adjusting shaft is rotationally connected in the first adjusting slot, the top wall of the first adjusting shaft is fixedly connected with a first adjusting seat, and the top wall of the first adjusting seat is provided with a second angle adjusting assembly for vertical direction left-right adjustment, the top wall of the second angle adjusting assembly is provided with a third angle adjusting assembly for vertical direction front-back adjustment, and the top wall of the third angle adjusting assembly is provided with a test guardrail, and the test guardrail comprises a rail seat, the top wall of the third angle adjusting assembly is symmetrically connected with the rail seat, and an electric push rod is installed on the middle top wall of the third angle adjusting assembly. The top wall of the electric push rod is provided with a guardrail fixing mechanism for quick installation and fixation, and the guardrail fixing mechanism comprises a locking assembly for locking and a reinforcing assembly for reinforcing locking, the locking assembly comprises a locking piece, and the locking piece is slidably penetrated into the corresponding rail seat and the corresponding positioning key from front to back. The top wall of the base is provided with an angle limiting mechanism one, and the angle limiting mechanism one comprises a first limiting assembly and a second limiting assembly, and the outer wall of the third angle adjusting assembly is provided with an angle limiting mechanism two for third angle limiting. The second angle adjusting assembly comprises a second adjusting slot, the middle top wall of the first adjusting seat is provided with a second adjusting slot, the outer wall of the second adjusting slot is rotationally connected with a second adjusting seat, the third angle adjusting assembly comprises a third adjusting slot, and the top wall of the second adjusting seat is provided with a third adjusting slot, the inside of the third adjusting slot is rotationally connected with a third adjusting seat, and the top wall of the third adjusting seat is fixed with four positioning rods in a matrix shape. The guardrail fixing mechanism comprises a sliding seat, and the top wall of the electric push rod is fixed with the sliding seat, the left and right side walls of the sliding seat are symmetrically and slidably connected with fixing pieces, and the fixing pieces are composed of sliding segments and positioning segments, the positioning segments of the fixing pieces are provided with positioning holes, and the positioning holes and the corresponding positioning rods are matched, the bottom walls of the positioning segments of the fixing pieces are fixed with four positioning keys in a matrix shape, and the positioning keys are connected with the corresponding rail seats.

2. A bridge guardrail impact testing device according to claim 1, wherein, The front and rear side walls of the first adjusting seat are rotationally connected with a second adjusting shaft, the bottom of the second adjusting seat is provided with a circular arc block with an upward axis extending forward and backward, and the second adjusting shaft is fixedly penetrated into the circular arc block inside the second adjusting seat from front to back.

3. A bridge barrier crash testing apparatus according to claim 2, wherein, The bottom of the third adjusting seat is provided with a circular arc block with an upward axis extending left and right, the third adjusting shaft is fixedly penetrated into the third adjusting seat from left to right, and the two ends of the third adjusting shaft are rotationally connected to the left and right side walls of the third adjusting slot.

4. The bridge guardrail impact testing apparatus of claim 1, wherein, The locking piece is composed of a horizontal plate and three round rods fixed at equal distances from left to right at the back of the horizontal plate, the three round rods of the locking piece are slidably penetrated into the corresponding rail seat and the corresponding positioning key, and the middle round rod of the three round rods of the locking piece is slidably penetrated into the corresponding positioning rod, and the rear ends of the three round rods of the locking piece are slidably penetrated into a first bolt.

5. A bridge guardrail impact testing device according to claim 3, wherein, The reinforcing assembly comprises slide rails, the top wall of the third adjusting seat is symmetrically provided with slide rails centered on the electric push rod, the outer wall of the slide rail is symmetrically and slidingly connected with a first reinforcing block and a second reinforcing block from front to back, the first reinforcing block and the corresponding second reinforcing block are connected in a clamping manner, and the connecting position of the first reinforcing block and the corresponding second reinforcing block is slidingly penetrated by a second bolt.

6. A bridge guardrail impact testing device according to claim 2, wherein The outer wall of the first angle adjusting assembly is provided with a first limiting assembly for first angle limiting, the first limiting assembly comprises a positioning arc-shaped plate, the front of the first adjusting shaft is provided with the positioning arc-shaped plate, and the left and right ends of the positioning arc-shaped plate are fixedly connected to the outer wall of the base, the side wall of the first adjusting shaft is clampingly connected with a first positioning strip, and the first positioning strip is slidingly penetrated into the inside of the positioning arc-shaped plate, the inside of the base is provided with an adjusting track, and the inside of the adjusting track is slidingly connected with an adjusting ring, the adjusting ring is composed of a circular ring segment, a horizontal rod on the top wall of the circular ring segment and vertical rods sliding up and down in the inside of the horizontal rod, and the vertical rods of the adjusting ring are slidingly penetrated into the overlapping position of the positioning arc-shaped plate and the first positioning strip.

7. A bridge barrier crash testing apparatus according to claim 6, wherein The outer wall of the second angle adjusting assembly is provided with a second limiting assembly for second angle limiting, the second limiting assembly comprises a first limiting groove, the front end of the second adjusting shaft is uniformly provided with the first limiting groove in the circumferential direction, and the inside of the first limiting groove located directly above the second adjusting shaft is clampingly connected with a second positioning strip, the top wall of the second positioning strip is fixedly provided with a first inverted U-shaped plate with an opening downward, and the bottom wall of the first inverted U-shaped plate is symmetrically provided with a first mounting groove, the positioning arc-shaped plate is clampingly connected into the first mounting groove, and the horizontal rod of the adjusting ring is arranged between the left and right side walls of the first inverted U-shaped plate.

8. The bridge guardrail impact testing apparatus of claim 3, wherein, The angle limiting mechanism two comprises a second limiting groove, the left and right ends of the third adjusting shaft are uniformly provided with the second limiting groove in the circumferential direction, and the inside of the second limiting groove located directly above the third adjusting shaft is clampingly connected with a third positioning strip, the top wall of the third positioning strip is fixedly provided with a second inverted U-shaped plate with an opening downward, and the side wall of the second inverted U-shaped plate away from the third adjusting seat is provided with a second mounting groove.

9. A bridge barrier crash testing apparatus according to claim 8, wherein, The left and right side walls of the second adjusting seat are fixedly provided with limiting seats, and the inside of the limiting seat is rotatably connected with an operating rod, the bottom wall of the second inverted U-shaped plate is clampingly connected to the top wall of the limiting seat, and the operating rod is composed of three horizontal rods and two U-shaped plates connected in an alternating manner, and the two U-shaped plates of the operating rod are clampingly connected into the second mounting groove.

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