CN210665314U

CN210665314U - Microcomputer-controlled electro-hydraulic servo universal testing machine

Info

Publication number: CN210665314U
Application number: CN201921337352.0U
Authority: CN
Inventors: 罗国琼; 程丰宇; 王志伟; 姜伟
Original assignee: Sichuan Chaoyang Highway Testing Co Ltd
Current assignee: Sichuan Chaoyang Highway Testing Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-06-02
Anticipated expiration: 2029-08-15

Abstract

The utility model relates to a servo universal tester of microcomputer control electricity liquid belongs to building material check out test set field, including the base, the fixed stand that is provided with on the base, the slip is provided with the lifter plate on the stand, and the fixed anchor clamps that are provided with down on the base are provided with displacement sensor on the anchor clamps down, and displacement sensor includes casing and measuring pole, and the fixed cover of measuring pole is equipped with the damping sleeve pipe, and the cover is equipped with the lantern ring on the damping sleeve pipe, and the fixed connecting rod that is provided with on the lantern ring, the one end that the lantern ring was kept. When the reinforcing bar takes place the brittle failure, the acceleration of upward movement this moment is great, and the static friction between lantern ring and the damping sleeve pipe this moment will be not enough to provide the pulling force that drives damping sleeve pipe and test rod upward movement for the lantern ring upward movement breaks away from the damping sleeve pipe, and damping sleeve pipe and test rod lose upward pulling force and will stop upward movement, prevents effectively that the test rod from exceeding displacement sensor's maximum stroke, prevents displacement sensor damage.

Description

Microcomputer-controlled electro-hydraulic servo universal testing machine

Technical Field

The utility model relates to a building material check out test set field, in particular to servo universal tester of microcomputer control electricity liquid.

Background

The hydraulic universal testing machine is widely applied to the departments of buildings, metallurgy, automobiles, machinery, technical monitoring, scientific research institutions and the like, is one of main devices of the scientific research departments and mechanical laboratories of higher institutions, and parameters such as mechanical properties of various materials need to be measured on the universal material testing machine.

Chinese patent with publication number CN206945430U discloses a hydraulic universal testing machine, which comprises a frame, wherein the frame is composed of a base, a support pillar, a hydraulic cylinder and a top plate, the hydraulic cylinder is respectively arranged at the left and right sides of the base, the top end of the support pillar is connected with the top plate, the top end of the hydraulic cylinder is provided with a connecting plate, an upper clamp is arranged under the connecting plate, and a lower clamp is arranged on the base. During operation, the two ends of the steel bar to be tested are clamped by the upper clamp and the lower clamp, the connecting plate is slowly pushed upwards through the hydraulic cylinder, the connecting plate drives the upper clamp to move upwards until the steel bar is broken, and the tensile test of the steel bar is completed.

Before a test, a displacement sensor needs to be clamped on a steel bar to be tested, and a detection rod of the displacement sensor extends along with the extension of the steel bar so as to detect the extension amount of the steel bar in real time; when the reinforcing bar is about to break, the displacement sensor needs to be removed. However, for unqualified steel bars, brittle fracture is easy to occur in the time period of taking down the displacement sensor; the moment of brittle failure, the hydraulic cylinder loses the reaction force of the reinforcing steel bar, the upper clamp can drive the reinforcing steel bar of the upper section to move upwards for a distance instantly, the maximum stroke of the displacement sensor is easily exceeded at the moment, and the displacement sensor is damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a servo universal tester of microcomputer control electricity liquid has the advantage that prevents displacement sensor damage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a servo universal tester of microcomputer control electricity liquid, includes the base, the fixed stand that is provided with on the base, it is provided with the lifter plate to slide on the stand, the fixed anchor clamps that are provided with on the diapire of lifter plate, the fixed anchor clamps that are provided with down on the base, be provided with the hydro-cylinder on the base, the piston rod and the lifter plate fixed connection of hydro-cylinder, vertical fixed displacement sensor that is provided with on the anchor clamps down, displacement sensor includes the casing and slides and wears to locate the measuring bar in the casing, the fixed cover of one end that the casing was kept away from to the measuring bar is equipped with the damping sleeve pipe, the cover is equipped with the lantern ring on the damping sleeve pipe, the fixed connecting rod that is provided with on the lantern.

According to the technical scheme, before the test, the steel bar to be tested is clamped tightly by the upper clamp and the lower clamp, then the steel bar is clamped tightly by the clamping assembly, and the lantern ring is sleeved on the damping sleeve; when the reinforcing steel bar is brittle-broken, the oil cylinder loses the reaction force of the reinforcing steel bar, the upper clamp can drive the reinforcing steel bar at the upper section and the lantern ring to instantly and quickly move upwards for a certain distance, the acceleration of the upward movement is large, the static friction force between the lantern ring and the damping sleeve is insufficient to provide the pulling force for driving the damping sleeve and the detection rod to move upwards, the lantern ring moves upwards and is separated from the damping sleeve, the damping sleeve and the detection rod lose the upward pulling force, the upward movement can be stopped, the detection rod is effectively prevented from exceeding the maximum stroke of the displacement sensor, and the displacement sensor is prevented from being damaged; and the displacement sensor does not need to be taken out in advance by a person before the test is finished, so that the injury to the person caused by the brittle failure of the reinforcing steel bar is prevented.

the utility model discloses further set up as the centre gripping subassembly includes fixture block and butt bolt, the draw-in groove has been seted up to the fixture block, and the fixture block is whole П shapes, the threaded hole that runs through to the draw-in groove is seted up to the lateral wall of fixture block, butt bolt thread is worn to locate in the threaded hole.

Implement above-mentioned technical scheme, with the fixture block joint on the reinforcing bar that awaits measuring, rotate the butt bolt, make butt bolt and reinforcing bar surface support tightly can, realize being connected between connecting rod and the reinforcing bar for the connecting rod removes along with the reinforcing bar.

The utility model discloses further set up to: and a handheld part is fixedly arranged at one end, far away from the clamping groove, of the butt bolt.

Implement above-mentioned technical scheme, the setting of handheld portion, the manual rotatory butt bolt of operating personnel of being convenient for, convenient to use.

The utility model discloses further set up to: the top of stand is fixed and is provided with the roof, the vertical fixed gag lever post that is used for with the top butt of test bar in order to inject the test bar position that is provided with of diapire of roof, the through-hole that supplies the gag lever post to pass is seted up to the lifter plate.

Implement above-mentioned technical scheme, when the measuring pole upwards move with the gag lever post butt, the measuring pole position is injectd, and the lantern ring can continue upwards to be removed, prevents that the measuring pole from exceeding the stroke, prevents displacement sensor from damaging.

The utility model discloses further set up to: the side wall of the lantern ring is fixedly provided with a mounting plate, a guide rod is fixedly arranged on the mounting plate along the direction parallel to the detection rod, one end of the connecting rod close to the detection rod is fixedly provided with a mounting block, and the mounting block is sleeved on the guide rod in a sliding manner; the guide rod is sleeved with a tension spring, one end of the tension spring is fixedly connected with the mounting plate, and the other end of the tension spring is fixedly connected with the mounting block.

Implement above-mentioned technical scheme, when the reinforcing bar takes place brittle failure, the connecting rod will take place the vibration on the great degree, and the setting of extension spring plays dispersion and the effect of weakening the vibrating force, reduces the vibration that the measuring stick received, prevents displacement sensor damage effectively.

The utility model discloses further set up to: the lantern ring is fixedly provided with a limiting block which is used for being abutted against the bottom wall of the mounting block to limit the position of the mounting block.

Implement above-mentioned technical scheme, installation piece and stopper butt play the purpose of injecing installation piece position for the extension spring keeps certain decurrent effort to the installation piece, so that the drive lantern ring rebound that can be stable when making the connecting rod upward movement, and the extension spring need not to extend again, improves the accuracy that displacement sensor detected.

The utility model discloses further set up to: the top of guide bar is provided with the pointed end portion.

According to the technical scheme, when the reinforcing steel bar is brittle-broken, the installation block moves upwards instantly to be easily separated from the guide rod, and due to the arrangement of the pointed end, the installation block can be conveniently inserted into the guide rod, and the operation is convenient.

The utility model discloses further set up to: a protective door is arranged on the base.

Implement above-mentioned technical scheme, the setting of guard gate when the reinforcing bar brittle failure, prevents that the reinforcing bar disintegrating slag that splashes from hindering the people, improves the security.

To sum up, the utility model discloses the beneficial effect who contrasts in prior art does:

when the steel bars are brittle-broken, the oil cylinder loses the reaction force of the steel bars, the upper clamp can drive the steel bars and the lantern rings at the upper section to instantly and quickly move upwards for a certain distance, the acceleration of the upward movement is large, the static friction force between the lantern rings and the damping sleeve is insufficient to provide the pulling force for driving the damping sleeve and the detection rod to move upwards, the lantern rings move upwards and are separated from the damping sleeve, the damping sleeve and the detection rod lose the upward pulling force, the upward movement can be stopped, the detection rod is effectively prevented from exceeding the maximum stroke of the displacement sensor, and the displacement sensor is prevented from being damaged;

when the detection rod moves upwards to be abutted against the limiting rod, the position of the detection rod is limited, and the lantern ring can continue to move upwards, so that the detection rod is prevented from exceeding the stroke, and the displacement sensor is prevented from being damaged;

when the reinforcing steel bar is brittle-broken, the connecting rod vibrates to a greater extent, and the tension spring is arranged to disperse and weaken the vibration, so that the vibration of the detection rod is reduced, and the displacement sensor is effectively prevented from being damaged.

Drawings

Fig. 1 is a schematic structural view of the whole of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is a schematic diagram of a part of the structure of the present invention.

Reference numerals: 1. a base; 11. a column; 111. a top plate; 12. a lower clamp; 13. an oil cylinder; 14. a protective door; 2. a lifting plate; 21. an upper clamp; 22. a through hole; 221. a limiting rod; 3. a displacement sensor; 31. a housing; 32. a detection lever; 321. a damping sleeve; 4. a collar; 41. a connecting rod; 411. mounting blocks; 412. a limiting block; 42. mounting a plate; 421. a guide bar; 4211. a tension spring; 4212. a tip portion; 5. a clamping assembly; 51. a clamping block; 511. a card slot; 512. a threaded hole; 52. an abutment bolt; 521. a hand-held portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, a microcomputer-controlled electro-hydraulic servo universal tester comprises a base 1, wherein four upright columns 11 are fixedly arranged on the base 1, the upright columns 11 are distributed around the base 1, and a top plate 111 is fixedly arranged at the top of each upright column 11; the upright post 11 is provided with a lifting plate 2, and the lifting plate 2 is sleeved on the upright post 11 in a sliding manner. An upper clamp 21 is fixedly arranged on the bottom wall of the lifting plate 2, a lower clamp 12 is fixedly arranged on the base 1, and the upper clamp 21 is opposite to the lower clamp 12. The base 1 is vertically and fixedly provided with two oil cylinders 13, piston rods of the oil cylinders 13 are fixedly connected with the lifting plate 2, the piston rods of the oil cylinders 13 are parallel to the upright post 11, and the two oil cylinders 13 are distributed on two sides of the lower clamp 12. In addition, a protective door 14 is arranged on the base 1; prevent the splashed broken steel bar slag from hurting people and improve the safety.

As shown in fig. 2 and 3, the lower fixture 12 is vertically and fixedly provided with a displacement sensor 3, the displacement sensor 3 includes a housing 31 and a detecting rod 32 slidably inserted into the housing 31, the detecting rod 32 is parallel to the steel bar, and the housing 31 can be adhered, welded or connected to the lower fixture 12 by bolts.

As shown in fig. 2 and 3, a damping sleeve 321 is fixedly sleeved at one end of the detection rod 32 away from the housing 31, and a collar 4 is sleeved on the damping sleeve 321; the friction force between the collar 4 and the damping sleeve 321 is slightly larger than the pulling force required for pulling the detection rod 32 to move upwards, but is smaller than the pulling force for pulling the detection rod 32 to accelerate the rising; when the steel bars are brittle and the collar 4 is accelerated to rise, the collar 4 will be separated from the damping sleeve 321.

as shown in fig. 3, a connecting rod 41 is fixedly arranged on the lantern ring 4, a clamping assembly 5 for clamping a steel bar to be tested is arranged at one end, away from the lantern ring 4, of the connecting rod 41, the clamping assembly 5 comprises a clamping block 51 and an abutting bolt 52, the clamping block 51 is provided with a clamping groove 511, the clamping block 51 is integrally П -shaped, a threaded hole 512 penetrating through the clamping groove 511 is formed in the side wall of the clamping block 51, the abutting bolt 52 is threaded in the threaded hole 512, a handheld portion 521 is fixedly arranged at one end, away from the clamping groove 511, of the abutting bolt 52, the handheld portion 521 is disc-shaped, the diameter of the handheld portion is larger than the diameter of the screw rod.

As shown in fig. 3, a limiting rod 221 for abutting against the top end of the detection rod 32 to limit the position of the detection rod 32 is vertically and fixedly arranged on the bottom wall of the top plate 111, and a through hole 22 for the limiting rod 221 to pass through is formed in the lifting plate 2; the stopper rod 221 is coaxial with the detection rod 32, and the diameter of the stopper rod 221 is not larger than the inner diameter of the collar 4, so that the collar 4 can continue to move upward along the stopper rod 221.

When the detection rod 32 moves upwards to abut against the limit rod 221, the position of the detection rod 32 is limited, and the collar 4 can continue to move upwards, so that the detection rod 32 is prevented from exceeding the stroke, and the displacement sensor 3 is effectively prevented from being damaged. In addition, when the reinforcing steel bar is brittle, even if the lantern ring 4 cannot be separated from the damping sleeve 321 in time and continues to drive the detection rod 32 to move upwards, the limiting rod 221 plays a role in protection and prevents the displacement sensor 3 from being damaged under extreme conditions.

As shown in fig. 3, a mounting plate 42 is fixedly disposed on a side wall of the collar 4, a guide bar 421 is fixedly disposed on the mounting plate 42 along a direction parallel to the detection bar 32, a tip portion 4212 is disposed on a top of the guide bar 421, and the tip portion 4212 is in a frustum shape. One end of the connecting rod 41 close to the detecting rod 32 is fixedly provided with a mounting block 411, and the mounting block 411 is slidably sleeved on the guide rod 421; a tension spring 4211 is sleeved on the guide rod 421, one end of the tension spring 4211 is fixedly connected with the mounting plate 42, and the other end is fixedly connected with the mounting block 411.

When the reinforcing steel bar is brittle, the connecting rod 41 vibrates to a greater extent, and the tension spring 4211 plays a role in dispersing and weakening the vibration, so that the vibration received by the detection rod 32 is reduced, and the displacement sensor 3 is effectively prevented from being damaged.

In addition, as shown in fig. 3, a stop block 412 for abutting against the bottom wall of the mounting block 411 to limit the position of the mounting block 411 is fixedly arranged on the collar 4. The installation piece 411 is abutted to the limiting block 412 to limit the position of the installation piece 411, so that the tension spring 4211 keeps certain downward acting force on the installation piece 411, the connecting rod 41 can stably drive the lantern ring 4 to move upwards when moving upwards, the tension spring 4211 does not need to be extended again, and the detection accuracy of the displacement sensor 3 is improved.

The specific working process is as follows: before the test, the steel bar to be tested is clamped tightly by the upper clamp 21 and the lower clamp 12, then is clamped tightly by the clamping assembly 5, the lantern ring 4 is sleeved on the damping sleeve 321, and the connecting rod 41 is kept perpendicular to the detection rod 32. During the experiment, drive lifter plate 2 upward movement through hydro-cylinder 13 to make go up anchor clamps 21 and rise and the extension of pulling reinforcing bar, drive connecting rod 41 and lantern ring 4 rebound, the static friction between lantern ring 4 and the damping sleeve pipe 321 is greater than the resistance that receives when detecting rod 32 removes, makes lantern ring 4 can drive damping sleeve pipe 321 and detecting rod 32 remove, accomplishes the tensile test of reinforcing bar.

When the reinforcing steel bar is brittle-broken, the oil cylinder 13 loses the reaction force of the reinforcing steel bar, the upper clamp 21 can drive the reinforcing steel bar at the upper section and the lantern ring 4 to instantly and quickly move upwards for a certain distance, the acceleration of the upward movement is large, the static friction force between the lantern ring 4 and the damping sleeve 321 is insufficient to provide the pulling force for driving the damping sleeve 321 and the detection rod 32 to move upwards, the lantern ring 4 moves upwards and is separated from the damping sleeve 321, the damping sleeve 321 and the detection rod 32 stop moving upwards when losing the upward pulling force, the detection rod 32 is effectively prevented from exceeding the maximum stroke of the displacement sensor 3, and the displacement sensor 3 is prevented from being damaged; and the displacement sensor 3 does not need to be taken out in advance by a person before the test is finished, so that the injury to the person caused by the brittle failure of the reinforcing steel bar is prevented.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a servo universal tester of microcomputer control electricity liquid, includes base (1), fixed stand (11) that is provided with on base (1), it is provided with lifter plate (2) to slide on stand (11), fixed anchor clamps (21) of being provided with on the diapire of lifter plate (2), fixed anchor clamps (12) down of being provided with on base (1), be provided with hydro-cylinder (13) on base (1), the piston rod and lifter plate (2) fixed connection of hydro-cylinder (13), its characterized in that: vertical fixed displacement sensor (3) that is provided with on anchor clamps (12) down, displacement sensor (3) are including casing (31) and slide and wear to locate measuring pole (32) in casing (31), the fixed cover of one end that casing (31) were kept away from in measuring pole (32) is equipped with damping sleeve pipe (321), the cover is equipped with lantern ring (4) on damping sleeve pipe (321), the fixed connecting rod (41) that is provided with on the lantern ring (4), the one end that the lantern ring (4) was kept away from in connecting rod (41) is provided with centre gripping subassembly (5) that are used for the centre gripping to await measuring the reinforcing bar.

2. the microcomputer-controlled electro-hydraulic servo universal testing machine according to claim 1, characterized in that the clamping assembly (5) comprises a clamping block (51) and an abutting bolt (52), the clamping block (51) is provided with a clamping groove (511), the clamping block (51) is overall in an n shape, the side wall of the clamping block (51) is provided with a threaded hole (512) penetrating through the clamping groove (511), and the abutting bolt (52) is threaded in the threaded hole (512).

3. The microcomputer-controlled electro-hydraulic servo universal tester as claimed in claim 2, wherein: and a handheld part (521) is fixedly arranged at one end of the abutting bolt (52) far away from the clamping groove (511).

4. The microcomputer-controlled electro-hydraulic servo universal tester as claimed in claim 1, wherein: the top of stand (11) is fixed and is provided with roof (111), the vertical fixed gag lever post (221) that is used for with the top butt of measuring stick (32) in order to injure measuring stick (32) position that is provided with of diapire of roof (111), through-hole (22) that supply gag lever post (221) to pass are seted up in lifter plate (2).

5. The microcomputer-controlled electro-hydraulic servo universal tester as claimed in claim 4, wherein: a mounting plate (42) is fixedly arranged on the side wall of the sleeve ring (4), a guide rod (421) is fixedly arranged on the mounting plate (42) along the direction parallel to the detection rod (32), a mounting block (411) is fixedly arranged at one end, close to the detection rod (32), of the connecting rod (41), and the mounting block (411) is slidably sleeved on the guide rod (421); the guide bar (421) is sleeved with a tension spring (4211), one end of the tension spring (4211) is fixedly connected with the mounting plate (42), and the other end of the tension spring is fixedly connected with the mounting block (411).

6. The microcomputer-controlled electro-hydraulic servo universal tester as claimed in claim 5, wherein: the lantern ring (4) is fixedly provided with a limiting block (412) which is used for being abutted against the bottom wall of the mounting block (411) to limit the position of the mounting block (411).

7. The microcomputer-controlled electro-hydraulic servo universal tester as claimed in claim 6, wherein: the top of the guide rod (421) is provided with a tip part (4212).

8. The microcomputer-controlled electro-hydraulic servo universal tester as claimed in claim 1, wherein: a protective door (14) is arranged on the base (1).