CN112254917A

CN112254917A - Rotary arm type horizontal impact test device

Info

Publication number: CN112254917A
Application number: CN202011120253.4A
Authority: CN
Inventors: 张景峰; 鲁涛; 邹育麟; 孔令云; 王睿; 司志增; 张宇; 刘静; 陈玉峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-01-22

Abstract

The invention discloses a rotary arm type horizontal impact test device which comprises a bottom plate, an impact part, a rotary base, a torsion spring, a rotary arm, a velocimeter, a reverse traction rope, a winch, a reaction wall and a test component, wherein the rotary base is vertically fixed on the upper end surface of the bottom plate, the torsion spring is sleeved outside the rotary base, the rotary arm is rotatably connected to the top end of the rotary base, a bearing is embedded in the lower end surface of the rotary arm, a unidirectional rotation damper is embedded in the upper end surface of the rotary arm, and the top end of the rotary base is provided with hole teeth meshed with a key tooth shaft of the unidirectional rotation damper; the impact part is vertically arranged on the side wall at one end of the rotary arm, and the counter-force wall is fixed on the bottom plate at one side of the impact part; the other side wall at one end of the revolving arm is detachably connected with a traction rope of a winch, and the winch is fixed on the bottom plate. The invention is not limited by the clearance of a laboratory, does not need a special reaction frame, has easily adjusted impact parameters and large variation range of impact energy, and can conveniently and repeatedly carry out impact tests.

Description

Rotary arm type horizontal impact test device

Technical Field

The invention relates to the field of impact protection test devices for civil engineering components, in particular to a rotary arm type horizontal impact test device.

Background

Civil engineering components (beams, columns and the like) can be subjected to impact load, such as vehicle/ship impact, rockfall impact and the like, and the impact test is an important means for acquiring the impact resistance of the engineering components and protecting the impact resistance. The current structural (member) impact test device is mainly divided into three types, one is a drop hammer with vertical and vertical impact, the second is a pendulum hammer similar to horizontal and lateral impact, and the third is a horizontal impact device with linear acceleration. The drop hammer and the pendulum bob both need a reaction frame arranged in a laboratory so as to facilitate the installation of the impact part, and the impact energy is limited by the clearance of a test space; because the impact energy of the hammer head and the impact energy of the hammer head are converted from gravitational potential energy, after the primary impact hammer head jumps, the hammer head falls down again under the action of gravity to easily cause secondary impact. The impact energy of the linear acceleration horizontal impact device is limited by the linear acceleration length of a laboratory, and the application is not wide.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a rotary arm type horizontal impact test device.

In order to achieve the purpose, the invention is implemented according to the following technical scheme:

a rotary arm type horizontal impact test device comprises a bottom plate, and further comprises an impact part, a rotary base, a torsion spring, a rotary arm, a velocimeter, a reverse traction rope, a winch, a counter-force wall and a test component, wherein the rotary base is vertically fixed on the upper end surface of the bottom plate, the torsion spring is sleeved outside the rotary base, the rotary arm is rotatably connected to the top end of the rotary base, a bearing is embedded in the lower end surface of the rotary arm at the joint of the rotary base, the top end of the rotary base is axially fixed in an inner ring of the bearing, a unidirectional rotation damper is embedded in the upper end surface of the rotary arm, and the top end of the rotary base is provided with hole teeth meshed with a key tooth shaft of the unidirectional rotation; the rotary arm and the bottom plate are parallel to each other, the lower end of the torsion spring is fixed on the bottom plate, the top end of the torsion spring is fixed on the lower end face of the rotary arm, the impact part is vertically arranged on the side wall of one end of the rotary arm, the velocimeter is fixed on the upper end face of one end of the rotary arm, the counterforce wall is fixed on the bottom plate on one side of the impact part, the test component is horizontally fixed on the counterforce wall, and the front end of the impact part in an initial state is vertically contacted with the outer end; the other side wall at one end of the revolving arm is detachably connected with a traction rope of a winch, and the winch is fixed on the bottom plate.

According to the technical scheme, the rotary arm can rotate around the rotary base, the winch is started and gradually recovers a traction rope connected to the back side of the impact part of the rotary arm, the rotary arm rotates towards the direction away from the impact part, the torsion spring arranged on the outer side of the rotary base gradually accumulates strain energy, after the traction rope on the outer side of the rotary arm is loosened, the torsion spring restores to deform and simultaneously drives the rotary arm to rotate towards the direction of a test component until the impact part collides with the test component, and the rotary arm moves in the reverse direction after colliding.

Furthermore, the distance between one end of the rotary arm provided with the impact part and the rotary base is larger than the distance between the other end of the rotary arm and the rotary base, and a balancing weight for keeping the rotary arm balanced is fixed on the lower end face of the other end of the rotary arm.

Furthermore, in order to measure and obtain the rotation speed and the final impact speed of the rotary arm, a velocimeter is fixed on the upper end face of one end of the rotary arm.

Preferably, in order to facilitate the connection or the disconnection of the traction rope of the winch to or from the slewing arm, the other side wall at one end of the slewing arm is provided with a shackle, and the end part of the traction rope of the winch is provided with a hook which is hooked in the shackle.

Preferably, in order to facilitate the installation and replacement of the impact part, the rear end of the impact part is detachably connected to the side wall at one end of the rotary arm, and the position of the impact part can be adjusted along the longitudinal direction of the rotary arm, so that the impact speed, the impact quality and the impact position can be quickly adjusted.

Compared with the prior art, the unidirectional rotation damper can drive the rotary arm to rotate towards the direction of the test component while the torsion spring recovers and deforms until the impact part and the test component are impacted and collided, and can prevent the rotary arm from colliding the test component secondarily or damaging a test device; the installation of the test device is not limited by the clearance of a laboratory, a special reaction frame is not needed, the impact parameters are easy to adjust, the variation range of the impact energy is large, and the impact test can be conveniently and repeatedly carried out.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

As shown in fig. 1, the present embodiment provides a swing arm type horizontal impact testing apparatus, which includes a bottom plate 11, and further includes an impact portion 1, a swing base 2, a torsion spring 3, a swing arm 5, a winch 8, a reaction wall 9, and a testing member 10, wherein the swing base 2 is vertically fixed on an upper end surface of the bottom plate 11, the torsion spring 3 is sleeved outside the swing base 2, the swing arm 5 is rotatably connected to a top end of the swing base 2, a bearing (not shown in the drawings) is embedded in a lower end surface of the swing arm 5 at a connection with the swing base 2, a top end of the swing base 2 is axially fixed in an inner ring of the bearing (it is required to explain that a connection relationship of the remaining bearings of the swing base 2 is common knowledge in the art, and therefore the present embodiment is not described again), a unidirectional rotation damper 4 is embedded in an upper end surface of the swing arm 5 (the unidirectional rotation damper, therefore, the detailed structure of the embodiment is not described again), the top end of the rotary base 2 is provided with hole teeth engaged with the key tooth shaft of the unidirectional rotation damper 4; the rotary arm 5 and the bottom plate 11 are parallel to each other, the lower end of the torsion spring 3 is fixed on the bottom plate 11, the top end of the torsion spring is fixed on the lower end face of the rotary arm 5, the impact part 1 is vertically arranged on the side wall of one end of the rotary arm 5, the reaction wall 9 is fixed on the bottom plate 11 on one side of the impact part 1, the test component 10 is horizontally fixed on the reaction wall 9, and the front end of the impact part 1 in an initial state is vertically contacted with the outer end face of the test component 10; the other side wall at one end of the revolving arm 5 is detachably connected with a traction rope 7 of a winch 8, and the winch 8 is fixed on a bottom plate 11.

In some embodiments, the distance between the end of the swivel arm 5 where the impact portion 1 is located and the swivel base 2 is greater than the distance between the other end of the swivel arm 5 and the swivel base 2, and a counterweight (not shown) for keeping the swivel arm 5 balanced is fixed to a lower end surface of the other end of the swivel arm 5, and the counterweight is generally a metal block, but may be made of other materials.

In some embodiments, a tachometer 6 is fixed to the upper end surface of one end of the swing arm 5 in order to measure the rotational speed of the swing arm 5 and the final impact speed.

In some embodiments, in order to facilitate the connection or disconnection of the traction rope 7 of the hoisting machine 8 to or from the slewing arm 5, the other side wall of one end of the slewing arm 5 is provided with a shackle (not shown), and the end of the traction rope 7 of the hoisting machine 8 is provided with a hook (not shown) which is hooked in the shackle.

In some embodiments, in order to facilitate the installation and replacement of the impact part, the rear end of the impact part 1 is detachably connected to the side wall of one end of the swivel arm 5, and the position of the impact part 1 can be adjusted along the longitudinal direction of the swivel arm 5, so as to realize the quick adjustment of the impact speed, the impact quality and the impact position.

The working process and principle of the invention are as follows:

after the impacted member 10 is mounted before the test is started, the test system needs to be debugged and ready, and the dotted line position of the revolving arm 5 in fig. 1 is an initial state;

then the windlass 8 is started and gradually recovers the traction rope 7 connected to the back side of the impact part 1 of the revolving arm 5, and simultaneously the revolving arm 5 rotates in the direction departing from the impact part to reach the solid line position of the revolving arm 5 as shown in fig. 1, and at this time, the torsion spring 3 arranged on the outer side of the revolving base 2 gradually accumulates strain energy;

further, the hook at the end of the traction rope 7 of the winch 8 is disengaged from the hook ring on the revolving arm 5, and the torsion spring 3 returns to deform and simultaneously drives the revolving arm 5 to rotate towards the test component 10 until the impact part 1 and the test component 10 collide with each other (as shown in the dotted line position in fig. 1, namely the impact part 5 and the test component collide with each other); the tachometer 6 arranged on the rotary arm 5 can measure the rotation speed and the final impact speed of the rotary arm 5; further, the rotary arm 5 moves reversely after collision, and in order to avoid secondary collision of the rotary arm on a test component or damage to a test device, the unidirectional rotation damper 4 plays a role in consuming kinetic energy after collision; thereby completing the whole experimental process.

The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A rotary arm type horizontal impact test device comprises a bottom plate (11) and is characterized by further comprising an impact part (1), a rotary base (2), a torsion spring (3), a rotary arm (5), a winch (8), a counterforce wall (9) and a test component (10), the rotary base (2) is vertically fixed on the upper end surface of the bottom plate (11), the torsion spring (3) is sleeved outside the rotary base (2), the rotary arm (5) is rotatably connected to the top end of the rotary base (2), a bearing is embedded in the lower end surface of the rotary arm (5) at the joint of the rotary base (2), the top end of the rotary base (2) is axially fixed in an inner ring of the bearing, a unidirectional rotary damper (4) is embedded in the upper end surface of the rotary arm (5), the top end of the rotary base (2) is provided with hole teeth meshed with a key tooth shaft of the unidirectional rotary damper (4); the rotary arm (5) and the bottom plate (11) are parallel to each other, the lower end of the torsion spring (3) is fixed on the bottom plate (11), the top end of the torsion spring is fixed on the lower end face of the rotary arm (5), the impact part (1) is vertically arranged on the side wall of one end of the rotary arm (5), the reaction wall (9) is fixed on the bottom plate (11) on one side of the impact part (1), the test component (10) is horizontally fixed on the reaction wall (9), and the front end of the impact part (1) in an initial state is vertically contacted with the outer end face of the test component (10); the other side wall of one end of the revolving arm (5) is detachably connected with a traction rope of a winch (8), and the winch (8) is fixed on the bottom plate (11).

2. The articulated arm horizontal impact test apparatus of claim 1, wherein: the distance between one end of the rotary arm (5) provided with the impact part (1) and the rotary base (2) is larger than the distance between the other end of the rotary arm (5) and the rotary base (2), and a balancing weight for keeping the rotary arm (5) balanced is fixed on the lower end face of the other end of the rotary arm (5).

3. The articulated arm horizontal impact test apparatus of claim 1, wherein: a velocimeter (6) is fixed on the upper end face of one end of the rotary arm (5).

4. The articulated arm horizontal impact test apparatus of claim 1 or 2, wherein: the other side wall of one end of the rotary arm (5) is provided with a hook ring, and the end part of a traction rope of the winch (8) is provided with a hook which is hooked in the hook ring.

5. The articulated arm horizontal impact test apparatus of claim 1, wherein: the rear end of the impact part (1) is detachably connected to the side wall of one end of the rotary arm (5).