CN202512026U - Clamp for testing longitudinal tension of flexible pipe - Google Patents

Abstract

The utility model relates to a clamp for testing the longitudinal tension of a flexible pipe. The clamp comprises a roll shaft, a cross beam, side plates and a rigid bar, wherein two ends of the cross beam are connected with the side plates, and the cross beam is connected with the roll shaft through the side plates; a slotted hole is formed in the roll shaft; and one end of a flexible pipe to be tested is connected into the slotted hole in a clamping mode through the rigid bar, and the rigid bar is used for fixing the flexible pipe to be tested onto the roll shaft. The flexible pipe sample to be tested is put in the slotted hole in the roll shaft, the flexible pipe is fixed on the roll shaft through the rigid bar, and therefore enough large clamping force is provided. The other end of the flexible pipe is clamped by a same clamp, so that the test for the longitudinal tension of the flexible pipe is realized. Meanwhile, as the contact area of the sample and the clamp is greatly increased, the pressure is reduced, and therefore the damaged chance of the sample is effectively reduced.

Description

A fixture for testing the longitudinal tension of flexible pipes

technical field

The utility model belongs to a tension testing device for a flexible pipe, in particular to a fixture for testing the longitudinal tension of a flexible pipe.

Background technique

Flexible pipes are used as protective sleeves for communication optical cables and cables, and tensile tests are required to achieve firm use, and the longitudinal tensile test of flexible pipes is an important test goal. The existing tension clamps rely on spring force or bolt fastening force to provide initial clamping force, and provide continuous clamping force through self-locking mechanism.

Due to the smooth surface of the flexible tube sample, the existing tensile fixtures cannot provide sufficient clamping force, and the sample is easy to slip off from the fixture. Moreover, the clamping part of the fixture is generally sharp, which is easy to damage the sample to be tested, resulting in the fracture of the sample at the clamping position, which seriously affects the test result.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the utility model is: the existing tensile fixture cannot provide enough clamping force, the sample is easy to slip off from the fixture, and the tested sample is easily damaged, which seriously affects the test result.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a fixture for testing the longitudinal tension of a flexible pipe. Wherein, the clamp includes a roller shaft, a beam, a side plate and a rigid rod, the two ends of the beam are connected with side plates, the beam is connected to the roller shaft through the side plate, and a slot is provided on the roller shaft, The rigid rod clamps one end of the flexible pipe to be tested in the slot, and is used to fix the flexible pipe to be tested on the roller shaft.

Preferably, a slider is connected to the beam, and the slider is connected to the tension member for providing tension to the beam.

Preferably, the rigid rod is a knurled rod, the roller shaft is a knurled roller, and the slot hole is a wedge-shaped slot.

Preferably, limiting holes are respectively provided on the side of the roller shaft and the side plate, and a connecting rod is inserted between the two limiting holes.

Preferably, the connecting rod is a pin.

Preferably, patterns are provided on the surface of the roller shaft.

Preferably, a handle is provided on the roller shaft for turning the roller shaft.

Preferably, the jig further includes a cowhide strap, which is used to be superimposed on the flexible pipe to be tested.

(3) Beneficial effects

The above technical solution has the following advantages: the utility model puts one end of the tested flexible pipe sample into the slot hole inside the roller shaft, and fixes the flexible pipe on the roller shaft through a rigid rod, thereby providing a sufficient clamping force , in order to realize the test of the longitudinal tension of the flexible pipe. At the same time, since the contact area between the sample and the fixture is greatly increased, the probability of damage to the sample is reduced.

Description of drawings

Fig. 1 is a schematic diagram of the use state of the clamp of the present utility model;

Fig. 2 is a partially enlarged schematic view of the utility model.

Among them, 1: roller shaft; 2: handle; 3: flexible tube to be tested; 4: side plate; 5: connecting rod; 6: rigid rod; 7: leather belt; 8: beam; 9: slider.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail.

The fixture of the present utility model includes a roller shaft, a beam, a side plate and a rigid rod. The two ends of the beam are connected with side plates. The rigid rod clamps one end of the flexible pipe to be tested in the slot, and is used to fix the flexible pipe to be tested on the roller shaft. The utility model puts the sample of the flexible pipe to be tested into the slot hole inside the roller shaft, and fixes the flexible pipe on the roller shaft through a rigid rod, thereby providing a sufficient clamping force, and the other end is also clamped with the same clamp Hold to realize the test of the longitudinal tension of the flexible pipe. At the same time, since the contact area between the sample and the fixture is greatly increased, the pressure is reduced, thereby effectively reducing the probability of damage to the sample.

As shown in Figures 1 and 2, it is an embodiment of the present utility model, each of the two ends of the flexible pipe to be tested is fixedly connected with a clamp, and the longitudinal tension test is performed by fixing the two ends of the flexible pipe through the clamp. The fixture of this embodiment includes a roller shaft 1, a beam 8, a side plate 4 and a rigid rod 6, the two ends of the beam 8 are connected with side plates 4, and the beam 8 is protruded from the side plate 4 with the side of the roller shaft 1. The shafts are connected to realize the connection between the roller shaft and the beam. The roller shaft 1 is provided with a slot hole, and the rigid rod 6 clamps one end of the flexible pipe 3 to be tested in the slot hole for fixing the flexible pipe 3 to be tested on the roller shaft 1 . A slider 9 is connected to the beam 8 in this example, and the slider 9 is connected to a tension member for providing tension to the beam 8 so as to provide an external force for the tension test of the flexible pipe. The maximum tensile force provided by the tensile component is 50kN, and the tensile component can be a variety of suitable components that provide external force, such as a tensile machine. In order to test some thinner and more fragile flexible pipes, preferably, the flexible pipe to be tested is superimposed with a cowhide strap 7 . In this embodiment, a cowhide belt with the same width as the sample of the flexible tube is superimposed on the sample, the cowhide belt is close to the surface of the roller shaft, and the flexible tube and the cowhide belt are superimposed to test the tensile force.

The roller shaft 1 of the present utility model can be various suitable rotating shafts, and is used for winding the flexible pipe to be tested on the roller shaft, preferably a knurled roller. The material of the knurling roller can be 45# quenched and tempered steel, and the outer diameter can be 5-30mm. In order to improve the friction force of the roller shaft, patterns are provided on the roller shaft, and the flexible pipe to be tested is wound on the roller shaft for several turns. The slot holes on the roller shaft 1 can also be of various suitable shapes, which are used to clamp the flexible tubes to be tested, preferably wedge-shaped slots, because the wedge-shaped holes are large and small at the bottom, which is more conducive to the rigid rods to catch the tubes to be tested. flexible tube3. The rigid rod 6 can also be a variety of metal or non-metallic rods, preferably a knurled rod. By reversely tensioning the sample, the knurled rod will press the sample against the wedge-shaped groove wall, which can effectively prevent the test The sample slips off to ensure the smooth progress of the tensile sample. The utility model puts the tested flexible pipe sample into the wedge-shaped groove inside the knurling roller, then reversely tightens the sample, and then wraps the sample around the knurling roller several times to form self-locking, so as to provide a large enough clamping force.

As shown in Figure 2, it is a partial enlarged schematic view of the clamp of the present invention. In order to realize the rotation of the roller shaft 1, a handle 2 is provided on the roller shaft 1 for rotating the roller shaft, saving the turning force. Limiting holes are provided on the side of the roller shaft 1 and the side plate 4 for passing through the connecting rod to fix the roller shaft. Since the roller shaft needs to be fixed when winding the flexible pipe to realize the tensile test, there are limit holes on the roller shaft 1 and the side plate 4, and the roller shaft 1 is fixed by inserting the connecting rod 5, one end of the connecting rod Inserted in the limiting hole on the side of the roller shaft, and the other end is inserted in the limiting hole on the side plate, preventing the rotation of the roller shaft 1 . The connecting rod 5 can be of various suitable shapes and materials, preferably a pin. The utility model can carry out the longitudinal tension test on the flexible pipe of any size, and the width of the flexible pipe needs to be matched with the roller shaft, preferably 10-100mm.

The process of carrying out the flexible pipe longitudinal tension test of the utility model is described below:

1) Put the sample of the flexible pipe to be tested into the wedge-shaped groove inside the knurling roller, and then tighten the sample in reverse, so that the knurled rod presses the sample to form the first buckle, and after pressing, ensure that the end of the sample is The part exposed outside the notch is 30-100mm long.

2) Tighten the sample, turn the handles of the upper and lower clamps respectively, wind the sample on the knurled roller and press the exposed part of the end of the sample to form a second buckle, and then wind several times. Insert the pin from the limit hole on the side plate into the limit hole of the knurled roller.

3) Move the upper and lower chucks to tighten the sample and prepare for the test.

It can be seen from the above examples that in the embodiment of the utility model, the flexible pipe sample to be tested is placed in the slot inside the roller shaft, and fixed by a rigid rod to provide a sufficient clamping force to realize the longitudinal deformation of the flexible pipe. Pull test. At the same time, since the contact area between the sample and the fixture is greatly increased, the pressure is reduced, thereby effectively reducing the probability of damage to the sample.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (8)

1. anchor clamps that are used to test the flexible pipe longitudinal pulling force; It is characterized in that comprise roll shaft, crossbeam, side plate and rigid rod, the two ends of said crossbeam are connected with side plate; Said crossbeam is connected with roll shaft through side plate; Said roll shaft is provided with slotted eye, and said rigid rod is connected to an end of flexible pipe to be tested in the slotted eye, is used for flexible pipe to be tested is fixed on roll shaft.

2. anchor clamps as claimed in claim 1 is characterized in that, are connected with pull head on the said crossbeam, and said pull head is connected with stress part, are used for to crossbeam pulling force being provided.

3. anchor clamps as claimed in claim 2 is characterized in that, said rigid rod is the annular knurl rod, and said roll shaft is a knurling roller, and said slotted eye is a wedge-shaped slot.

4. anchor clamps as claimed in claim 1 is characterized in that, are respectively equipped with spacing hole on the side of said roll shaft and the said side plate, are interspersed with connecting link between two spacing holes.

5. anchor clamps as claimed in claim 4 is characterized in that, said connecting link is a latch.

6. like any one described anchor clamps among the claim 1-5, it is characterized in that the surface of said roll shaft is provided with decorative pattern.

7. like any one described anchor clamps among the claim 1-5, it is characterized in that said roll shaft is provided with handle, be used to rotate roll shaft.

8. like any one described anchor clamps among the claim 1-5, it is characterized in that said anchor clamps also comprise the ox-hide band, said ox-hide band is used for being superimposed with flexible pipe to be tested.

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