CN109186917B - Impact-resistant test device for safety net - Google Patents
Impact-resistant test device for safety net Download PDFInfo
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- CN109186917B CN109186917B CN201811190783.9A CN201811190783A CN109186917B CN 109186917 B CN109186917 B CN 109186917B CN 201811190783 A CN201811190783 A CN 201811190783A CN 109186917 B CN109186917 B CN 109186917B
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- safety net
- test device
- ball falling
- base
- mounting
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- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000006260 foam Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 3
- 238000009863 impact test Methods 0.000 claims 4
- 238000005452 bending Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a safety net impact resistance test device, which comprises a base in a shape like a Chinese character 'Hui', a hanging bracket arranged on the base, a ball falling mechanism arranged at the top of the hanging bracket and used for hanging and releasing test balls, two mounting beams which can be arranged below the ball falling mechanism in a front-back moving way, a driving mechanism used for driving two mounting Liang Xiangxiang or moving oppositely, and a control electric box, wherein the mounting beams are arranged on the lower part of the ball falling mechanism; the mounting beams are horizontally arranged along the left-right direction, the two mounting beams are symmetrically arranged at the front side and the rear side right below the ball falling mechanism, and the mounting beams are provided with fixing components for fixing the safety net; the ball falling mechanism and the driving mechanism are electrically connected with a control electric box, and the control electric box is used for controlling the ball falling mechanism and the driving mechanism to work. The safety net of the device is convenient to install, simple to operate and high in safety.
Description
Technical Field
The invention relates to the technical field of safety net detection, in particular to a safety net impact resistance test device.
Background
The safety net used in the building construction can be put into use only through an impact-resistant test, the safety net is required to be suspended and horizontally fixed when the impact-resistant test is carried out, then a test ball (usually a steel ball) is released from a high place, the test ball freely falls down to impact the safety net, the situation that a person falls from the high place is simulated, and whether the quality passes or not is judged according to the damage degree of the safety net. The safety net mounting position of the existing safety net impact resistance test device is fixed, the length of a detection sample is 6m, the width of the detection sample is 3m, the size is relatively large, and a tester needs to fix the safety net and then walk to the other side to fix the safety net according to the specification of the safety net impact resistance test, so that the safety net impact resistance test device is troublesome.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a safety net impact resistance test device, which is convenient to install and simple to operate.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The safety net impact resistance test device comprises a base in a shape like a Chinese character 'Hui', a hanging bracket arranged on the base, a ball falling mechanism arranged at the top of the hanging bracket and used for lifting and releasing test balls, two mounting beams which can be arranged below the ball falling mechanism in a back-and-forth moving manner, a driving mechanism used for driving two mounting Liang Xiangxiang or moving oppositely, and a control electric box; the mounting beams are horizontally arranged along the left-right direction, the two mounting beams are symmetrically arranged at the front side and the rear side right below the ball falling mechanism, and the mounting beams are provided with fixing components for fixing the safety net; the ball falling mechanism and the driving mechanism are electrically connected with a control electric box, and the control electric box is used for controlling the ball falling mechanism and the driving mechanism to work.
In the safety net impact resistance test device, the ball falling mechanism comprises an electric crane arranged at the top of the hanging frame, the lower end of a sling of the electric crane is connected with an electric gripper for gripping a test ball, and the electric crane and the electric gripper are electrically connected with a control electric box.
In the safety net impact resistance test device, the driving mechanism comprises a motor, a transmission mechanism, two bidirectional lead screws and corresponding lead screw nuts, wherein the motor is fixed on the base, the two bidirectional lead screws are symmetrically arranged on the left side and the right side of the base and extend along the front-back direction; the motor drives the two bidirectional lead screws to synchronously rotate through the transmission mechanism; the two ends of the mounting beam are fixedly connected with corresponding screw nuts; the motor is electrically connected with the control electric box.
In the safety net impact resistance test device, the fixing component comprises a plurality of spring buckles which are uniformly distributed along the axial direction of the mounting beam, and the spring buckles are connected to the top of the mounting beam.
In the safety net impact resistance test device, the mounting beam comprises three steel pipes which are parallel to each other and are distributed in a triangular mode, wherein one steel pipe is arranged on the upper side, and the other two steel pipes are symmetrically arranged below the steel pipes; a plurality of connecting cross bars and a plurality of diagonal braces are vertically connected between the adjacent steel pipes; two ends of the upper steel pipe are fixedly connected with corresponding screw nuts.
In the safety net impact resistance test device, the base is formed by connecting square steel pipes; the hanging bracket comprises two vertical frames which are symmetrically arranged on the front side and the rear side of the base and are formed by connecting square steel pipes, and a cross beam which is connected with the tops of the two vertical frames.
In the safety net impact resistance test device, the stand comprises a lower vertical part, an inclined part and an upper vertical part which are sequentially connected, and the distance between the upper vertical parts of the two stand is smaller than the distance between the lower vertical parts.
In the safety net impact resistance test device, the front side of the upper vertical part of the vertical frame at the rear side is vertically provided with a telescopic scale, and scale marks of the scale are arranged on the front side surface.
In the safety net impact resistance test device, the base is fixed on the ground, a ball falling pit is formed under the ball falling mechanism, and a buffer body is arranged in the ball falling pit.
In the safety net impact resistance test device, the buffer body is a foam plastic plate, a foam cushion and/or sand.
The beneficial effects are that:
The invention provides a safety net impact resistance test device, during test, a test ball is lifted to a certain height through a ball falling mechanism, then two mounting beams are moved to positions close to each other, a tester can fix two sides of the safety net at the same time, then two mounting Liang Fuwei prop up the safety net, the tester lifts the test ball to the test height after the tester moves back to a safety range, and finally the ball falling mechanism is controlled by a control box to release the test ball to finish the test. Therefore, the safety net of the device is convenient to install, simple to operate and high in safety.
Drawings
Fig. 1 is a perspective view of a safety net impact resistance test device provided by the invention.
Fig. 2 is a side view of the impact resistance test device for the safety net provided by the invention.
Fig. 3 is a schematic structural view of an installation beam in the impact resistance test device for the safety net.
Fig. 4 is a schematic structural view of a spring buckle in the safety net impact resistance test device provided by the invention.
Detailed Description
The invention provides a safety net impact resistance test device, which is used for making the purposes, technical schemes and effects of the invention clearer and more definite, and is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Herein, the front side refers to the side facing the operator in use, i.e., the left side in fig. 2, the rear side being opposite to the front side; the left and right directions are the same as the left and right directions of an operator in use, namely, the directions vertical to the paper surface in fig. 2.
Referring to fig. 1-4, the impact resistance test device for a safety net provided by the invention comprises a base 1 in a shape of a Chinese character 'hui', a hanging bracket 2 arranged on the base, a ball falling mechanism 3 arranged on the top of the hanging bracket and used for lifting and releasing test balls, two mounting beams 4 movably arranged below the ball falling mechanism back and forth, a driving mechanism used for driving two mounting Liang Xiangxiang or moving oppositely, and a control electric box 5; the mounting beams 4 are horizontally arranged along the left-right direction, the two mounting beams are symmetrically arranged at the front side and the rear side right below the ball falling mechanism, and the mounting beams are provided with fixing assemblies 6 for fixing the safety net; the ball falling mechanism and the driving mechanism are electrically connected with a control electric box, and the control electric box is used for controlling the ball falling mechanism and the driving mechanism to work.
During the test, the test ball can be lifted to a certain height through the ball falling mechanism (slightly higher than the mounting beams so as to ensure the safety of test personnel), then the two mounting beams are moved to the positions close to each other, the test personnel can fix the two sides of the safety net at the same time without moving back and forth to fix the two sides, then the safety net is propped up by the two mounting Liang Fuwei, the test ball is lifted to the test height after the test personnel moves back to the safety range, and finally the test ball is released by the ball falling mechanism under the control of the electric box to complete the test. Therefore, the safety net of the device is convenient to install, simple to operate and high in safety.
The control electric box mainly comprises a box body, a PLC controller and corresponding circuits, wherein the PLC controller and the corresponding circuits are arranged in the box body, and a control button is arranged on the box body; the control button, the power supply, the ball falling mechanism and the driving mechanism are all electrically connected with the PLC.
Specifically, the ball falling mechanism 3 comprises an electric crane 3.1 arranged at the top of the hanging frame 2, the lower end of a sling of the electric crane is connected with an electric gripper 3.2 for gripping a test ball, and the electric crane and the electric gripper are electrically connected with a control electric box. The electric gripper is used for grabbing and releasing the test ball, and the electric crane is used for lifting the electric gripper. The electric crane and the electric gripper are both of the prior art and are commercially available directly, and the structure thereof is not described in detail here.
Further, the driving mechanism comprises a motor 7 fixed on the base 1, a transmission mechanism 8, two bidirectional lead screws 9 symmetrically arranged on the left side and the right side of the base and extending along the front-back direction and corresponding lead screw nuts 10; the motor drives the two bidirectional lead screws to synchronously rotate through the transmission mechanism; the two ends of the mounting beam 4 are fixedly connected with corresponding screw nuts 10; the motor is electrically connected with the control electric box. When the motor rotates, the two bidirectional screw rods synchronously rotate, so that the two screw rod nuts on the same bidirectional screw rod move in opposite directions or in opposite directions, and the two installation Liang Xiangxiang are driven to move in opposite directions.
The transmission mechanism 8 can be a belt transmission mechanism, a chain transmission mechanism, a synchronous belt transmission mechanism and the like; the bidirectional screw rod 9 is mounted on the base 1 through a plurality of bearings and bearing seats.
In this embodiment, the fixing component 6 includes a plurality of snap fasteners 6.1 (see fig. 4 for a specific structure of the snap fasteners in the prior art) uniformly distributed along the axial direction of the mounting beam 4, and the snap fasteners are connected to the top of the mounting beam. The two sides of the safety net are buckled through the plurality of spring buckles, the safety net is convenient and quick to assemble and disassemble, reliable in connection and not easy to fall off, and the test efficiency can be improved.
Specifically, as shown in fig. 3, the mounting beam 4 includes three steel pipes 4.1 which are parallel to each other and are arranged in a triangle, wherein one steel pipe is arranged on the upper side, and the other two steel pipes are symmetrically arranged below the steel pipes; a plurality of connecting cross bars 4.2 and a plurality of diagonal braces 4.3 are vertically connected between the adjacent steel pipes; the two ends of the upper steel pipe are fixedly connected with the corresponding screw nuts 10. The spring buckle 6.1 is connected to the upper steel pipe 4.1, so that the safety net is convenient to install. Because the length of the mounting beam is longer, the bending strength of the mounting beam can be improved by adopting the structure, the weight is smaller, the complete deformation caused by the impact force of the test ball can be effectively prevented, and the accuracy of the test result is ensured.
Furthermore, the base 1 is formed by connecting square steel pipes; the hanging bracket 2 comprises two vertical frames 2.1 which are symmetrically arranged on the front side and the rear side of the base and are formed by connecting square steel pipes, and a cross beam 2.2 which is connected with the tops of the two vertical frames. The structure can ensure the structural strength and simultaneously reduce the total weight of the device. The electric crane 3.1 is arranged in the middle of the cross beam 2.2 to ensure that the test ball is aligned with the middle of the safety net and ensure the accuracy of test results.
Wherein, the stand 2.1 includes lower vertical portion 2.1a, slope portion 2.1b and upper vertical portion 2.1c that connect gradually, and the distance between the upper vertical portion 2.1c of two stands is less than the distance between the lower vertical portion 2.1 a. The hanger 2 is in a convex shape in side view, can bear larger vertical force, and is beneficial to shortening the length of the cross beam 2.2, thereby improving the bending strength and preventing the stress deformation.
Preferably, as seen in fig. 1, the front side of the upper upright 2.1c of the rear upright 2.1 is vertically provided with a retractable scale 11, the scale marks of which are provided on the front side. An operator can directly see the height of the test ball from the scale when standing in front of the test device, so that the lifting height of the test ball is ensured to be correct, and the accuracy of the test result is further ensured; the scale is set to be telescopic, and can be retracted when not in use, so that the scale is prevented from bending deformation due to the fact that the scale is out of the way to influence the measurement accuracy.
In addition, as shown in fig. 2, the base 1 is fixed on the ground, a ball drop pit 12 is arranged right below the ball drop mechanism 3, and a buffer body 12.1 is arranged in the ball drop pit. Due to the arrangement of the ball drop pit, the height of the base 1 can be reduced, the safety net can not touch the ground, the weight and the gravity center of the device can be reduced, and the stability is improved.
In particular, the cushioning body may be a foam board, a foam cushion and/or sand.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.
Claims (9)
1. The safety net impact resistance test device is characterized by comprising a base in a shape like a Chinese character 'Hui', a hanging bracket arranged on the base, a ball falling mechanism arranged at the top of the hanging bracket and used for hanging and releasing test balls, two mounting beams which can be arranged below the ball falling mechanism in a back-and-forth moving manner, a driving mechanism used for driving the two mounting Liang Xiangxiang or moving oppositely, and a control electric box; the mounting beams are horizontally arranged along the left-right direction, the two mounting beams are symmetrically arranged at the front side and the rear side right below the ball falling mechanism, and the mounting beams are provided with fixing components for fixing the safety net; the ball falling mechanism and the driving mechanism are electrically connected with a control electric box, and the control electric box is used for controlling the ball falling mechanism and the driving mechanism to work; the driving mechanism comprises a motor fixed on the base, a transmission mechanism, two bidirectional lead screws and corresponding lead screw nuts, wherein the bidirectional lead screws are symmetrically arranged on the left side and the right side of the base and extend along the front-back direction; the motor drives the two bidirectional lead screws to synchronously rotate through the transmission mechanism; the two ends of the mounting beam are fixedly connected with corresponding screw nuts; the motor is electrically connected with the control electric box.
2. The safety net impact-resistant test device according to claim 1, wherein the ball falling mechanism comprises an electric crane arranged at the top of the hanging frame, the lower end of a sling of the electric crane is connected with an electric gripper for gripping the test ball, and the electric crane and the electric gripper are electrically connected with the control electric box.
3. The safety net impact test device according to claim 1, wherein the fixing assembly comprises a plurality of spring buttons which are uniformly distributed along the axial direction of the mounting beam and are connected to the top of the mounting beam.
4. The safety net impact test device according to claim 1, wherein the mounting beam comprises three steel pipes which are parallel to each other and are arranged in a triangle, wherein one steel pipe is arranged on the upper side, and the other two steel pipes are symmetrically arranged below the steel pipes; a plurality of connecting cross bars and a plurality of diagonal braces are vertically connected between the adjacent steel pipes; two ends of the upper steel pipe are fixedly connected with corresponding screw nuts.
5. The safety net impact resistance test device according to claim 1, wherein the base is formed by connecting square steel pipes; the hanging bracket comprises two vertical frames which are symmetrically arranged on the front side and the rear side of the base and are formed by connecting square steel pipes, and a cross beam which is connected with the tops of the two vertical frames.
6. The safety net impact test device according to claim 5, wherein the stand comprises a lower vertical portion, an inclined portion and an upper vertical portion which are sequentially connected, and a distance between the upper vertical portions of the two stand is smaller than a distance between the lower vertical portions.
7. The impact resistance test device for safety nets according to claim 6, wherein a retractable scale is vertically provided at a front side of the upper vertical portion of the rear stand, and graduation lines of the scale are provided on the front side.
8. The impact resistance test device for the safety net according to any one of claims 1 to 7, wherein the base is fixed on the ground, a ball drop pit is formed right below the ball drop mechanism, and a buffer body is arranged in the ball drop pit.
9. The safety net impact test device according to claim 8, wherein the buffer is a foam board, a foam cushion and/or sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190783.9A CN109186917B (en) | 2018-10-12 | 2018-10-12 | Impact-resistant test device for safety net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190783.9A CN109186917B (en) | 2018-10-12 | 2018-10-12 | Impact-resistant test device for safety net |
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| Publication Number | Publication Date |
|---|---|
| CN109186917A CN109186917A (en) | 2019-01-11 |
| CN109186917B true CN109186917B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811190783.9A Active CN109186917B (en) | 2018-10-12 | 2018-10-12 | Impact-resistant test device for safety net |
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| CN (1) | CN109186917B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089805B (en) * | 2019-12-23 | 2022-08-26 | 台州市椒江建设工程质量检测中心有限公司 | Impact resistance testing machine for engineering safety net |
| CN113607577A (en) * | 2021-08-06 | 2021-11-05 | 广州增城正源建设工程检测中心有限公司 | Safety net impact resistance testing machine |
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| CN103306428A (en) * | 2013-06-26 | 2013-09-18 | 清华大学 | Built-in heavy load beam member of novel composite truss |
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| CN207248481U (en) * | 2017-09-20 | 2018-04-17 | 杨金祥 | A kind of project delivery method safety supervisor |
| CN207636419U (en) * | 2018-01-02 | 2018-07-20 | 广东泰升工程质量检测有限公司 | A kind of safety net test equipment |
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| CN208902372U (en) * | 2018-10-12 | 2019-05-24 | 广东建源检测技术有限公司 | A kind of safety net impact resistance experimental rig |
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2018
- 2018-10-12 CN CN201811190783.9A patent/CN109186917B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110118005A (en) * | 2010-04-22 | 2011-10-28 | (주)청아아이앤시 | Apparatus for testing of safety net impact |
| KR20120007475U (en) * | 2012-08-28 | 2012-10-30 | (주)청아아이앤시 | Apparatus for testing of safety net impact |
| CN103306428A (en) * | 2013-06-26 | 2013-09-18 | 清华大学 | Built-in heavy load beam member of novel composite truss |
| CN204602687U (en) * | 2015-03-15 | 2015-09-02 | 邯郸市康特轴承有限公司 | Hand-rail type bearing cleaning machine |
| CN204705459U (en) * | 2015-06-25 | 2015-10-14 | 承德市德盛检测设备有限公司 | Safety net impact testing machine |
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