CN211122267U - Geosynthetic material puncture test fixture - Google Patents

Abstract

The utility model discloses a geosynthetic material puncture test anchor clamps, top-down include anchor clamps, lower anchor clamps in proper order, be used for control drive arrangement and base that anchor clamps go up and down, go up anchor clamps and base and connect through a set of vertical connecting rod, and the connecting rod passes anchor clamps down and is provided with the locating part between anchor clamps and base down. The middle parts of the upper clamp and the lower clamp are respectively provided with a through hole for the puncture testing machine to carry out puncture tests. The test fixture is simple in structure, low in cost, simple in operation of the using method, free of frequent bolt screwing, greatly reduced in labor intensity and improved in working efficiency. In addition, a groove is formed between the upper clamp and the lower clamp, the sample can be effectively prevented from sliding, the driving device selects the oil jack with high force, the clamping force between the upper clamp and the lower clamp can be increased, and the problem that the sample slips in the puncturing process due to insufficient clamping force is effectively solved.

Description

Geosynthetic material puncture test fixture

Technical Field

The utility model relates to a material test technical field especially relates to a geosynthetic material puncture test anchor clamps.

Background

In recent decades, geosynthetics have become the fourth largest building material behind steels, cement and wood due to their excellent properties of seepage prevention, drainage, reverse filtration, reinforcement and the like, and the test of geosynthetics is becoming more important, and the test technology is increasing. The puncture test is an important method for measuring the puncture resistance of geotextile, geomembrane and related geotechnical products, the test principle is that a cut sample is clamped in a clamp, a testing machine drives a puncture ejector rod to vertically move downwards at a certain speed to jack the sample until the sample is punctured, and the maximum puncture strength in the test process is the puncture strength.

The traditional puncture test fixture is composed of a fixture and a fixture base, the fixture and the fixture base are fixedly connected through a bolt, the bolt must be screwed by hands or an electric drill to clamp or separate the fixture and the fixture base when the fixture is used for assembling and disassembling the specimen at each time, the operation of the method is more complicated, time and labor are wasted, the labor efficiency is low, the bolt is easy to slip, and the problem that the sample slips in the puncture process due to insufficient clamping force is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims at using bolted connection anchor clamps and anchor clamps base among the prior art, the loaded down with trivial details defect consuming time and the centre gripping dynamics is not enough of operation process, and provide a geosynthetic material puncture test anchor clamps, this test anchor clamps include base and two upper and lower anchor clamps, carry out altitude mixture control to anchor clamps down through oil pressure jack to anchor clamps step up and relieve about making. The problem of frequently twist the bolt and waste time and energy is solved, the centre gripping dynamics has been increased simultaneously. The test fixture is convenient to operate, greatly reduces labor intensity and improves working efficiency.

For realizing the utility model discloses a technical scheme that the purpose adopted is:

a geosynthetic material puncture test fixture sequentially comprises an upper fixture, a lower fixture, a driving device and a base from top to bottom, wherein the upper fixture is connected with the base through a group of at least three vertical connecting rods;

and through holes for the puncture testing machine to perform puncture tests are respectively arranged in the middle parts of the upper clamp and the lower clamp.

In the technical scheme, the driving device is an oil jack and comprises an oil tank, a piston rod, a pressure relief needle valve and a rocker, and the top end of the piston rod supports the lower clamp to control the lower clamp to lift.

In the technical scheme, a sleeve is fixedly connected below the through hole of the lower clamp, and the inner diameter of the sleeve is not smaller than the diameter of the through hole.

In the technical scheme, the side surfaces of the upper clamp and the lower clamp, which are contacted with the sample to be tested, are provided with the grooves.

In the above technical scheme, the connecting rod is a bolt, and the upper end and the lower end of the connecting rod are respectively fastened and connected with the upper clamp and the base.

In the above technical solution, the limiting member is a nut disposed on the bolt.

In the technical scheme, the bolt is 400-600mm long, the diameter is 10-15mm, and the outer diameter of the nut is 15-40 mm.

In the above technical scheme, the upper clamp and the lower clamp are discs with through holes in the middle.

In the technical scheme, the outer diameter of the disc is 80-150mm, and the diameter of the through hole is 45 +/-0.025 mm.

The use method of the puncture test fixture for geosynthetics comprises the following steps,

step 1: placing a sample to be tested between an upper clamp and a lower clamp;

step 2: placing a driving device at the bottom of the lower clamp, starting the driving device to move upwards, and jacking the lower clamp to the upper clamp and the lower clamp to clamp the sample to be tested;

and step 3: starting a puncture testing machine to carry out puncture test;

and 4, step 4: starting the driving device to move downwards, so that the lower clamp descends to the limiting part, and taking out the sample to be tested after the puncture test is completed;

and 5: and (5) repeating the steps 1-4 to carry out the puncture test of the next sample to be tested.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a geosynthetic material punctures test fixture is provided with the slot between two anchor clamps from top to bottom, can effectively avoid the sample to produce and slide, and oil jack power degree is great, and the power degree of holding that adds between two anchor clamps about the multiplicable has effectively avoided causing the problem of sample slippage at the puncture in-process because of the centre gripping dynamics is not enough.

2. The utility model provides a geosynthetic material puncture test anchor clamps simple structure, the cost is lower, and application method easy operation need not frequently to twist the bolt, greatly reduced intensity of labour, improved work efficiency.

Drawings

Fig. 1 is a schematic view showing the overall structure of the geosynthetic puncture test jig.

Figure 2 is a cross-sectional view of the geosynthetic puncture test fixture.

In the figure: 1-upper clamp, 2-lower clamp, 3-base, 4-connecting rod, 5-limiting piece, 6-through hole, 7-oil tank, 8-piston rod, 9-pressure relief needle valve, 10-rocker and 11-sleeve.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

A geosynthetic material puncture test fixture sequentially comprises an upper fixture 1, a lower fixture 2, a driving device for controlling the lower fixture 2 to lift and a base 3 from top to bottom, wherein the upper fixture 1 and the base 3 are connected through four uniformly distributed vertical connecting rods 4, the connecting rods 4 penetrate through the lower fixture 2, a limiting part 5 is arranged between the lower fixture 2 and the base 3, and the lower fixture 2 can slide up and down between the upper fixture 1 and the limiting part 5 along the connecting rods 4; and through holes 6 for the puncture testing machine to perform puncture tests are respectively arranged in the middle parts of the upper clamp 1 and the lower clamp 2.

The use method of the puncture test fixture for geosynthetics comprises the following steps,

step 1: a sample to be detected is placed between the upper clamp 1 and the lower clamp 2;

step 2: placing a driving device at the bottom of the lower clamp 2, starting the driving device to move upwards, jacking the lower clamp 2 to the upper clamp 1 and the lower clamp 2 to clamp the sample to be tested;

and step 3: starting a puncture testing machine to carry out puncture test;

and 4, step 4: starting the driving device to move downwards, so that the lower clamp 2 descends to the limiting part 5, and taking out the sample to be tested after the puncture test is finished;

and 5: and (5) repeating the steps 1-4 to carry out the puncture test of the next sample to be tested.

Example 2

This embodiment is a preferred structure of the driving device described above based on embodiment 1.

The oil jack as a driving device is widely applied by the advantages of low price, portability, practicability, high driving force and the like. This embodiment adopts oil jack as the drive arrangement of anchor clamps clamp force, has solved the difficult problem that frequently twists the bolt and waste time and energy, and this utility model low in labor strength, work efficiency are high, simple structure, convenient operation, with low costs, and the controllability is higher.

Preferably, the driving device is an oil jack and comprises an oil tank 7, a piston rod 8, a pressure relief needle valve 9 and a rocker 10, and the top end of the piston rod 8 supports the lower clamp 2 to control the lifting of the lower clamp 2.

The control method of the oil jack comprises the following steps:

upwards: closing the pressure relief needle valve 9, and utilizing the rocker 10 to lift the piston rod 8;

downwards: the pressure relief needle valve 9 is opened, and the piston rod 8 descends under the action of gravity.

Example 3

This embodiment is described based on embodiment 1, and its preferred structure is described.

Preferably, a sleeve 11 is fixedly connected below the through hole 6 of the lower clamp 2, and the inner diameter of the sleeve 11 is not smaller than the diameter of the through hole 6. The through hole 6 is designed to reserve a space for the piercing mandril in the piercing tester. Based on this design, the driving device can be located at the center of the lower clamp 2, making its driving force more uniform.

Preferably, the surface of one side of the upper clamp 1 and the lower clamp 2, which is in contact with the sample to be measured, is provided with a groove. The friction force between the sample to be measured and the upper clamp 1 and the lower clamp 2 can be increased, and the sample to be measured is prevented from sliding.

Preferably, in this embodiment, the upper clamp 1 and the base 3 are connected by three vertical connecting rods 4 uniformly distributed, the connecting rods 4 are bolts, and the upper end and the lower end of each connecting rod are respectively fastened and connected with the upper clamp 1 and the base 3.

Preferably, the stopper 5 is a nut provided on the bolt. The bolt is matched with the nut, so that the upper position and the lower position of the limiting part 5 can be conveniently adjusted.

Preferably, the bolt is 400-600mm long and 10-15mm in diameter, and the outer diameter of the nut is 15-40 mm. The external diameter of nut is greater than the diameter of the screw that lower anchor clamps 2 supplied the bolt to pass to prevent that lower anchor clamps 2 from passing the nut landing, play limiting displacement.

Preferably, the upper clamp 1 and the lower clamp 2 are circular discs with a through hole 6 in the middle. The disc can ensure that the sample to be tested is stressed uniformly in all directions.

Preferably, the outer diameter of the disc is 80-150mm, and the diameter of the through hole 6 is 45 ± 0.025 mm. The diameter of the passage 6 is suitable for the puncture mandril of most puncture testing machines, so that the smooth operation of the puncture test is ensured.

Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The geosynthetic material puncture test fixture is characterized by sequentially comprising an upper fixture (1), a lower fixture (2), a driving device for controlling the lower fixture (2) to ascend and descend and a base (3) from top to bottom, wherein the upper fixture (1) is connected with the base (3) through a group of at least three vertical connecting rods (4), the connecting rods (4) penetrate through the lower fixture (2) and a limiting piece (5) is arranged between the lower fixture (2) and the base (3), and the lower fixture (2) can slide up and down between the upper fixture (1) and the limiting piece (5) along the connecting rods (4);

and through holes (6) for the puncture testing machine to perform puncture tests are respectively arranged in the middle parts of the upper clamp (1) and the lower clamp (2).

2. The geosynthetic puncture test fixture of claim 1, wherein the driving device is an oil jack comprising an oil tank (7), a piston rod (8), a pressure relief needle valve (9), and a rocker (10), and a top end of the piston rod (8) supports the lower fixture (2) to control the elevation of the lower fixture (2).

3. The geosynthetic puncture test fixture of claim 1, wherein a sleeve (11) is fixedly connected below the through-hole (6) of the lower fixture (2), and an inner diameter of the sleeve (11) is not smaller than a diameter of the through-hole (6).

4. The geosynthetic puncture test fixture of claim 1, wherein the side surfaces of the upper fixture (1) and the lower fixture (2) that contact the sample to be tested are provided with grooves.

5. The geosynthetic puncture test fixture of claim 1, wherein the connecting rod (4) is a bolt, and the upper end and the lower end of the connecting rod are respectively and fixedly connected with the upper fixture (1) and the base (3).

6. The geosynthetic puncture test fixture of claim 5, wherein the retainer (5) is a nut disposed on the bolt.

7. The geosynthetic puncture test fixture of claim 6, wherein the bolt is 400 mm long and 10-15mm in diameter, and the nut has an outer diameter of 15-40 mm.

8. The geosynthetic puncture test fixture of claim 1, wherein the upper fixture (1) and the lower fixture (2) are disks having a through-hole (6) in the middle.

9. The geosynthetic puncture test fixture of claim 8, wherein the disc has an outer diameter of 80-150mm, and the through-hole (6) has a diameter of 45 ± 0.025 mm.

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