CN219532737U - Anti-dazzle board wind load anchor clamps and testing arrangement - Google Patents

Abstract

The utility model relates to the field of clamps, in particular to an anti-dazzle plate wind load-resistant clamp and a testing device, which comprise a first clamp, a second clamp and a clamp fixing piece, wherein the first clamp and the second clamp are fixedly installed through the clamp fixing piece, and the first clamp comprises a first base, a plurality of first pneumatic rods distributed on one side of the first base and a first pneumatic device arranged on the first base for pushing the first pneumatic rods; the second clamp comprises a second base, a plurality of second pneumatic rods distributed on one side of the second base and a second pneumatic device arranged on the second base for pushing the second pneumatic rods; the fixture fixing piece is connected with the first base and the second base, a clamping space of the anti-dazzle board is formed between the first base and the second base, and the plurality of first pneumatic rods and the second pneumatic rods are distributed in the clamping space relatively. The clamp is used for solving the problems that the stress of the clamp is uniform and the detection data is unreliable, expanding the application range of the clamp and improving the reliability of the detection data.

Description

Anti-dazzle board wind load anchor clamps and testing arrangement

Technical Field

The utility model relates to the field of clamps, in particular to an anti-dazzle plate wind load resistant clamp and a testing device.

Background

The anti-dazzle board is mainly used for blocking glare of opposite lanes by the central dividing strip of the expressway, the wind speed and the wind power on the expressway are strong, and the daily maintenance cost of the expressway is high, so that the service life of the anti-dazzle board installed in the expressway needs to be as long as possible to be beneficial to reducing the maintenance cost of the expressway. How to estimate the service life of the anti-dazzle board in advance through laboratory detection becomes the problem that the manufacturers and users of the anti-dazzle board need to solve at present.

The wind resistance test provides reliable test data and reference standard for predicting the service life of the anti-dazzle board, and the wind resistance test is to apply uniform wind load to a test piece under the simulated wind load condition in a laboratory and evaluate the deformation condition, connection fixation and other overall conditions of the test piece in the test. The early wind resistance performance detection adopts a sand bag or a water bag to detect the compression time and the deformation degree of a test piece through unidirectional pressurization, but the detection method has poor uniformity of wind direction loading and can only provide unidirectional pressure, has no sign with the actual wind direction, has limited detection range, and cannot accurately evaluate the wind resistance performance of the test piece. With the development of laboratory detection modes, wind resistance detection is generally divided into two modes, namely static wind load detection and dynamic wind load detection. The test equipment in the wind resistance performance detection can simulate real wind load, the simulated wind load uniformly acts on the anti-dazzle board, when the dynamic wind load detection and the static wind load detection are combined, the wind resistance performance of the anti-dazzle board can be better verified, the reliability of test simulated wind resistance load data is improved, and the accuracy of the evaluation of the wind resistance performance of the anti-dazzle board is improved.

In the detection of the wind resistance of the existing anti-dazzle board, because manufacturers and specifications of the anti-dazzle board are different, the waveform structure of the anti-dazzle board is quite different, so that the clamping device for clamping the anti-dazzle board in the detection of the existing wind resistance is used for clamping the anti-dazzle board through the front clamping plate and the rear clamping plate with screw holes and then locking the two clamping plates by using screws, but because the screws are misplaced, when the anti-dazzle board is subjected to simulated wind force loading after being locked, the stress points of the clamping plates are only two screws at the back, the contact area between the clamping plates and the screws is small, and the stress area of the clamping plates is too small, so that the reliability of the detection data of the anti-dazzle board is affected.

How to improve the existing clamp for clamping the anti-dazzle board in the test process, so that the front and rear clamps for clamping the anti-dazzle boards with different specifications and different sizes are stressed uniformly, and the reliability of the anti-dazzle board detection data is improved, which is a problem to be solved.

Disclosure of Invention

The utility model aims to overcome at least one defect (deficiency) of the prior art, and provides an anti-dazzle plate wind load-resistant clamp which is used for solving the problem that front and back clamps for clamping anti-dazzle plates with different specifications and different sizes are uniformly stressed, so that the reliability of anti-dazzle plate detection data is improved.

The technical scheme adopted by the utility model is that the anti-dazzle plate wind load-resistant clamp comprises a first clamp, a second clamp and a clamp fixing piece, wherein the first clamp and the second clamp are fixedly installed through the clamp fixing piece, the first clamp comprises a first base, a plurality of first pneumatic rods distributed on one side of the first base and first pneumatic devices arranged on the first base for pushing the first pneumatic rods, and each first pneumatic rod independently stretches and contracts relative to the first base under the control of the first pneumatic devices; the second clamp comprises a second base, a plurality of second pneumatic rods and second pneumatic devices, the second pneumatic rods are distributed on one side of the second base, the second pneumatic devices are arranged on the second base and used for pushing the second pneumatic rods, and each second pneumatic rod independently stretches and contracts relative to the second base under the control of the second pneumatic devices; the fixture fixing piece is connected with the first base and the second base, a clamping space of the anti-dazzle board is formed between the first base and the second base, and the plurality of first pneumatic rods and the second pneumatic rods are distributed in the clamping space relatively.

Further, the first pneumatic device comprises a first cylinder body extending to the inside of the first base, and a first air inlet hole and a first air outlet hole are formed in the first cylinder body; the second pneumatic device comprises a second cylinder body extending to the inside of the second base, and a second air inlet hole and a second air outlet hole are formed in the second cylinder body. The pneumatic device is favorable for the two clamps to be more uniform in stress through the pneumatic device extending to the base, and the cylinder is favorable for controlling the load and reducing the test detection cost.

Further, the first cylinder body extends into the first base to form a cavity distributed along the first base, a plurality of first cylinder cavities provided with first pneumatic rods are arranged on one side of the first base and communicated with the cavity, and a first piston is arranged at the rear end of each first pneumatic rod and slides in each first cylinder cavity; the second cylinder body extends into the second base to form a cavity distributed along the second base, a plurality of second cylinder cavities for installing second pneumatic rods are formed in one side of the second base and are communicated with the cavity, and a second piston is arranged at the rear end of each second pneumatic rod and slides in each second cylinder cavity. The anti-dazzle board is favorable for keeping stable stress under the clamping of a plurality of pneumatic rods, and keeping independent stress among the pneumatic rods, thereby being suitable for the clamping of the anti-dazzle boards with different wave structures.

Further, the clamp fixing piece is an adjusting mechanism capable of adjusting the size of the clamping space. The anti-dazzle board clamping device is beneficial to expanding the detection range of the clamp in the wind resistance detection and is suitable for clamping anti-dazzle boards with different specifications and different sizes.

Further, the fixture fixing piece comprises connecting rods which are distributed on two sides of the clamping space and are used for connecting the first base and the second base, and the relative positions of the first base and the second base on the connecting rods are adjustable. The anti-dazzle plate wind-resistant load test fixture is beneficial to increasing the effective wind-bearing area of the anti-dazzle plate wind-resistant load in the anti-wind performance test, is suitable for testing different wind-resistant loads, and expands the application range of the fixture.

Further, the clamp fixing piece comprises adjusting brackets which are distributed on two sides of the clamping space and are connected with the first base and the second base. The anti-dazzle plate wind-resistant load test fixture is beneficial to increasing the effective wind-bearing area of the anti-dazzle plate wind-resistant load in the anti-wind performance test, is suitable for testing different wind-resistant loads, and expands the application range of the fixture.

Further, the fixture fixing piece comprises screws which are distributed on two sides of the clamping space and are connected with the first base and the second base. The width and height of the two bases can be conveniently adjusted, and flexible operation of test personnel is facilitated.

Preferably, the anti-dazzle board wind load testing device is used for loading and testing the anti-dazzle board and comprises a test bed, a tension machine, a traction device and an air pump, wherein the test bed is used for fixing the anti-dazzle board, one end of the traction device is connected with an anti-dazzle board wind load clamp, the other end of the traction device is connected with the tension machine, the air pump provides positive and negative pump pressures for the first pneumatic device and the second pneumatic device, and the anti-dazzle board wind load clamp is controlled to clamp the anti-dazzle board.

Further, the test stand comprises a suspension device for controlling the height of the anti-dazzle plate wind load resistant clamp. The anti-dazzle board is beneficial to being placed in the center of the test bed and is beneficial to observing the deformation resistance and the impact resistance of the anti-dazzle board.

Further, the traction device comprises a traction rope and a pulley, one end of the traction rope is connected with the anti-dazzle plate wind load clamp, the other end of the traction rope bypasses the pulley to be connected with the tension machine, the height of the pulley is adjustable, and the traction rope is kept in a horizontal traction anti-dazzle plate state. The mechanical combination of the pulley is favorable for realizing the change of the stress direction of the clamp through the adjustment of the height of the pulley, and is also favorable for saving the force of the tension machine through the adjustment of the pulley and the traction rope.

Compared with the prior art, the utility model has the beneficial effects that: the application range of the clamp in the anti-dazzle board wind resistance detection is enlarged, the stress of the clamp in the simulated wind load is enhanced to be uniform, and the accuracy and reliability of wind resistance detection data are improved.

Drawings

FIG. 1 is a top cross-sectional view of the wind load resistant clamp of the present utility model.

Fig. 2 is a side view of the wind load testing apparatus of the present utility model.

The attached drawings are used for identifying and describing: 110 first base, 111 first cylinder chamber, 120 first air bar, 121 first piston, 141 first air inlet, 142 first air outlet, 210 second base, 211 second cylinder chamber, 220 second air bar, 221 second piston, 241 second air inlet, 242 second air outlet, 500 antiglare shield, 600 test bench, 700 pulling machine, 810 pulling rope, 820 pulley.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the utility model. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, in this embodiment, before the wind resistance of the antiglare shield starts to be detected, the bottom of the antiglare shield 500 needs to be vertical to the ground, and the position to be clamped is marked; then the first clamp and the second clamp are slowly moved downwards from the end part of the antiglare shield 500 to the clamping position marked in the previous step; then, the first pneumatic device and the second pneumatic device are started, the pressure change in the first pneumatic device is controlled through the first air inlet hole 141 and the first air outlet hole 142, the pressure change in the second pneumatic device is controlled through the second air inlet hole 241 and the second air outlet hole 242, at this time, the first piston 121 and the second piston 221 move in the first cylinder cavity 111 and the second cylinder cavity 211 respectively towards the direction approaching the antiglare shield 500, so that the first pneumatic rod 120 and the second pneumatic rod 220 are driven to approach the antiglare shield 500. And the traction rope 810 is installed through a traction ring, the traction ring is arranged in the middle of the first base 110, one end of the traction rope 810 is connected with the traction ring, and the other end of the traction rope bypasses the pulley 820 to be connected with the tension machine 700. After being ready, the wind resistance test of the dazzle prevention plate 500 is started.

In this embodiment, the start and stop of the first pneumatic device and the second pneumatic device are synchronous, that is, the displacements of the first piston 121 and the second piston 221 in the first cylinder chamber 111 and the second cylinder chamber 211, respectively, are equal, so as to ensure that the stress of the antiglare shield 500 is uniform.

In this embodiment, the clamp fixing member may adjust the size of the clamping space, and the clamp fixing member includes a connecting rod, an adjusting bracket and a screw rod, which are distributed on two sides of the clamping space and connect the first base 110 and the second base 210, and when a tester wants to adjust the size of the clamping space to test wind load data of the antiglare shield 500 under different effective wind-bearing areas, the position of the connecting rod, the adjusting bracket or the screw rod may be adjusted.

In this embodiment, reference is made to national standard GB/T24718-2009, wherein both the index requirements and the test methods for the general physicochemical properties of the antiglare shield are specified. The antiglare shield in the embodiment is suitable for wind resistance detection, and the required test items are wind load F, deformation resistance R and shock resistance. The technical requirement of the standard on the wind load F is that F should not be less than the product of C and S, wherein C is the wind load constant, the value is 1647.5N/square meter, and S is the effective wind bearing area of the anti-dazzle board of the standard; the technical requirement for the deformation resistance R is that R is less than or equal to 10mm/m, and the technical requirement for the impact resistance is that after the impact resistance test, the surface of the sample or the plate body is free from cracking, stripping or other damage phenomena outside the area with the radius of 6mm by taking the impact point as the center of a circle.

Example 2

In this embodiment, as shown in fig. 2, the bottom of the antiglare shield 500 is fixed on the test stand 600, the middle of the antiglare shield 500 is clamped by the first clamp and the second clamp, the midpoint of the first clamp and the midpoint of the second clamp are used as mechanical traction points, the traction rope 810 made of rigid materials is used to bypass the pulley 820 and is firmly connected with the tensile machine 700, the mechanical traction points and the lower edge of the pulley 820 are on the same straight line, the traction direction of the traction rope is perpendicular to the surface of the antiglare shield 500, and under the condition that the traction rope 810 is completely loosened, the traction is performed at a speed of 100mm/min until the surface of the antiglare shield 500 is broken or the maximum load is reached, and the test is stopped, at this time, the maximum traction load is the antiglare load of the antiglare shield. Thus, 3 groups of tests were performed in total, and the arithmetic average of the test results of 3 times was taken as the test result.

In this embodiment, the antiglare shield 500 is fixed to the test stand 600 and is connected well to the tension machine 700. Marking a projection S0 from the upper end of the anti-dazzle board 500 to the plane of the operation desk; the pulling machine 700 is started to pull at a speed of 15mm/min, and when the traction load reaches the wind-resistant load specified in national standard GB/T24718-2009, the traction is stopped. Unloading the applied load to enable the anti-dazzle board 500 to recover freely and elastically, and performing projection from the upper end of the anti-dazzle board 500 to the plane of the operation platform after 5min, wherein the deformation resistance R of the anti-dazzle board 500 can be expressed as R= (S1-S0)/H by a formula, and the R is the deformation resistance and the unit is mm/m; s1, final projection displacement, wherein the unit is mm; s0 is initial projection displacement, and the unit is mm; h is the plate height in m. Thus, 3 groups of tests were performed in total, and the arithmetic average of the test results of 3 times was taken as the test result.

In this example, the antiglare shield 500 was subjected to a test after being adjusted for 24 hours under standard environmental conditions (test environmental temperature 23.+ -. 2 ℃ C.; test environmental relative humidity 50%.+ -. 5%). The anti-dazzle board 500 should be placed on the hard ground or the test bench 600 smoothly, and a steel ball with the weight of 1kg freely falls from the position 1m from the height of the surface of the anti-dazzle board 500 to impact the anti-dazzle board 500, so that the steel ball is ensured to only contact with the anti-dazzle board once in the impact process, the impact point of each anti-dazzle board should be selected from the upper, middle and lower 3 parts to perform impact tests, and the observation test result should meet the relevant regulations in national standard GB/T24718-2009.

In this embodiment, the tensile machine in the testing device should conform to the specifications in the national standard GB/T1446-2005. The relative load error of the tensile machine 700 is required to be not more than +/-1% in the stipulation; the tensile machine 700 can obtain constant test speed, and when the test speed is greater than 10mm/min, the error is not more than 10%; the relative error of the instrument for measuring deformation in the tension machine 700 should not exceed +/-1%; the physical properties of the tensile machine 700 should meet the specifications of the corresponding standard; the tensile machine 700 is calibrated periodically through a metering department with corresponding qualification; the tonnage of the mechanical tension machine and the tonnage of the oil pressure tension machine are selected so that the applied load of the antiglare shield is within the range of 10% -90% of full load (as far as possible at one side of full load), and the applied load is not less than 4% of the maximum tonnage of the tension machine; the choice of tonnage for use of the electronic tension machine and the servo hydraulic tension machine should be referred to the specification of the machine.

It should be understood that the foregoing examples of the present utility model are merely illustrative of the present utility model and are not intended to limit the present utility model to the specific embodiments thereof. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present utility model should be included in the protection scope of the claims of the present utility model.

Claims (10)

1. The anti-dazzle board wind load-resistant clamp comprises a first clamp (100), a second clamp (200) and a clamp fixing piece (300), wherein the first clamp (100) and the second clamp (200) are fixedly installed through the clamp fixing piece (300),

the first clamp (100) comprises a first base (110), a plurality of first pneumatic rods (120) distributed on one side of the first base (110) and first pneumatic devices (130) arranged on the first base (110) for pushing the first pneumatic rods (120), wherein each first pneumatic rod (120) independently stretches and contracts relative to the first base (110) under the control of the first pneumatic devices (130);

the second clamp (200) comprises a second base (210), a plurality of second pneumatic rods (220) distributed on one side of the second base (210) and second pneumatic devices (230) arranged on the second base (210) for pushing the second pneumatic rods (220), and each second pneumatic rod (220) independently stretches and contracts relative to the second base (210) under the control of the second pneumatic devices (230);

the fixture fixing piece (300) is connected with the first base (110) and the second base (210) and forms a clamping space (400) of the anti-dazzle board (500) between the first base and the second base, and the plurality of first pneumatic rods (120) and the plurality of second pneumatic rods (220) are distributed in the clamping space (400) relatively.

2. The antiglare shield wind load clamp according to claim 1, wherein the first pneumatic means (130) comprises a first cylinder block (140) extending into the first base (110), the first cylinder block (140) having a first inlet port (141) and a first outlet port (142) disposed thereon; the second pneumatic device (230) comprises a second cylinder body (240) extending to the inside of the second base (210), and a second air inlet hole (241) and a second air outlet hole (242) are arranged on the second cylinder body (240).

3. The anti-dazzle board wind load resistant fixture according to claim 2, wherein the first cylinder body (140) extends into the first base (110) to form a cavity distributed along the first base (110), a plurality of first cylinder cavities (111) for installing the first pneumatic rods (120) are formed on one side of the first base (110) and are communicated with the cavity, and a first piston (121) is arranged at the rear end of the first pneumatic rods (120) and slides in the first cylinder cavities (111); the second cylinder body (240) extends into the second base (210) to form a cavity distributed along the second base (210), a plurality of second cylinder cavities (211) for installing second pneumatic rods (220) are formed in one side of the second base (210) and are communicated with the cavity, and second pistons (221) are arranged at the rear ends of the second pneumatic rods (220) and slide in the second cylinder cavities (211).

4. A wind load resistant antiglare shield clip according to any one of claims 1 to 3 wherein the clip securing member (300) is an adjustment mechanism capable of adjusting the size of the clip space (400).

5. The antiglare shield wind load clamp according to claim 4, wherein the clamp fixture (300) comprises connecting rods distributed on both sides of the clamping space (400) and connecting the first base (110) and the second base (210), and the relative positions of the first base (110) and the second base (210) on the connecting rods are adjustable.

6. The antiglare shield wind load clamp according to claim 4, wherein the clamp fixture (300) comprises an adjustment bracket disposed on both sides of the clamping space (400) connecting the first base (110) and the second base (210).

7. A wind load resistant fixture for anti-glare plates according to any one of claims 1 to 3, wherein the fixture fixing member (300) comprises screws distributed at both sides of the clamping space (400) to connect the first base (110) and the second base (210).

8. An anti-dazzle board wind load testing arrangement for carry out loading test to anti-dazzle board (500), characterized by, including test bench (600), pulling force machine (700), draw gear (800) and air pump (900), test bench (600) are used for fixed anti-dazzle board (500), draw gear (800) one end is connected anti-dazzle board wind load anchor clamps of any one of claims 1-7, and pulling force machine (700) are connected to the other end, air pump (900) provide positive negative pump pressure to first pneumatic means (130) and second pneumatic means (230), control anti-dazzle board wind load anchor clamps centre gripping anti-dazzle board (500).

9. The antiglare loading test apparatus of claim 8, wherein the test stand (600) comprises a suspension device that controls the antiglare loading clamp height.

10. The antiglare shield wind load test equipment of claim 8, wherein the traction means (800) comprises a traction rope (810) and a pulley (820), one end of the traction rope (810) is connected with the antiglare shield wind load clamp, the other end is connected with the tension machine (700) by bypassing the pulley (820), and the pulley (820) is adjustable in height, so that the traction rope (810) is kept in a horizontal traction antiglare shield state.