CN218470373U

CN218470373U - Pipe drawing force test fixture

Info

Publication number: CN218470373U
Application number: CN202222658641.9U
Authority: CN
Inventors: 王武; 杨明辉; 何勃; 张鑫
Original assignee: Gansu Road Engineering Quality Test Detection Center Co ltd; Gansu Academy Of Transportation Sciences Group Co ltd
Current assignee: Gansu Road Engineering Quality Test Detection Center Co ltd; Gansu Academy Of Transportation Sciences Group Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-02-10
Anticipated expiration: 2032-10-10

Abstract

The utility model discloses a tubular product drawing force test anchor clamps belongs to tubular product inspection technical field to the problem of centre gripping is stabilized to the unable multiple model of adaptation, the specification tubular product of the supporting anchor clamps of solution tubular product drawing force test machine. The fixture comprises a testing machine connector, a limiting plate and a positioning ring which are sequentially arranged from top to bottom. The testing machine connector is arranged at the top of the limiting plate, and at least three vertical rods are arranged between the limiting plate and the positioning ring; the holding ring radially sets up at least set setting element, and the setting element includes radially passes the screw rod that the holding ring can be twisted, and the end of screw rod one side is equipped with the arc, and the arc is located the circle of holding ring. The utility model discloses simple structure, raw and other materials are easy, processing is convenient, and one set of anchor clamps can adapt multiple type and the different tubular product of pipe diameter especially in the use, promotes the degree of accuracy of experimental data result on the basis of guaranteeing the centre gripping effect. Has high popularization value.

Description

Pipe drawing force test fixture

Technical Field

The utility model belongs to the technical field of the tubular product inspection, concretely relates to tubular product drawing force test fixture.

Background

The pipe drawing force is a test method for testing the longitudinal tension borne by the connected pipe and pipe fitting. The test sample is assembled by a pipe fitting and a section of pipe or two sections of pipe, the size of the pipe is matched with that of the pipe fitting, and the pipe is assembled according to the requirements of product specifications. And (3) fixing the assembled sample on a testing machine, gradually loading the force value of the sample which is calculated in advance within 30s, keeping the sample under constant longitudinal tension for 1h, and checking whether the joint of the sample is loosened.

In the prior art, various products needing to be subjected to a pipe drawing force test are various, such as polyethylene pressure pipes, heat-resistant polyethylene (polypropylene) pipeline systems for cold and hot water, drainage pipeline systems, plastic corrugated pipes for prestressed concrete bridges and the like. The drawing force tests of different pipes are completed on a testing machine, the pipes are fixed by a clamp and then are subjected to the drawing force tests, and the clamps of the samples have no unified standard and style due to the diversity of pipe products.

The existing clamps provided by various testing machine manufacturers on the market are different and have different emphasis. Some are adaptable to various sizes of the same tubing product, but are not universal for gripping in different types of products. Some of them can be suitable for different pipes with same size of samples, but can not be used universally in different sizes of products. Still some not only can not be suitable for various tubular products, still in order to fasten tubular product when the sample is installed, easily cause anchor clamps to the destruction of sample, the practicality is extremely poor.

In summary, the prior art clamps all have the same problem: that is, a product type or a specification size is provided with a set of clamp, so that the clamp matched with the material drawing force test is very numerous and complicated, and the test needs to be searched and selected in a test room, thereby wasting time and labor. In addition, most of the clamps cannot be adjusted in the clamping of the sample to clamp the sample, and the damage or the damage of the sample caused by over-tight clamping cannot be caused, which is an important reason that the sample is wasted due to the damage of the sample caused by the clamp, and is also an important reason of the deviation of the test data result, and the improvement is urgently needed. Moreover, the clamps of various tester manufacturers cannot be used universally.

In order to solve the above problems, a pipe drawing force test fixture has been developed by testing personnel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tubular product drawing force test anchor clamps to solve the problem that the centre gripping was stabilized to the unable multiple model of adaptation, the specification tubular product of the supporting anchor clamps of tubular product drawing force test machine.

In order to solve the above problems, the utility model discloses technical scheme does:

the utility model provides a tubular product pulling force test fixture, includes testing machine connector, limiting plate, the holding ring that top-down set gradually. The testing machine connector is arranged at the top of the limiting plate, and at least three vertical rods are arranged between the limiting plate and the positioning ring; the positioning ring is radially provided with at least one set of positioning part, the positioning part comprises a screw rod which radially penetrates through the positioning ring and can be screwed, the tail end of one side of the screw rod is provided with an arc-shaped plate, and the arc-shaped plate is positioned in a circle of the positioning ring;

furthermore, the holding ring is along the downward a plurality of settings of limiting plate axial, and montant one end is fixed in the limiting plate bottom, and the montant other end passes a plurality of holding rings in proper order. The pressure to tubular product when the dispersion centre gripping is guaranteed to the setting of a plurality of holding rings, the centre gripping effect.

Furthermore, the positioning ring can freely move up and down along the vertical rod, and a group of positioning nuts are arranged on the vertical rod and positioned at the top and the bottom of the positioning ring. The distance between each locating ring is adjusted through the position of the locating nut on the vertical rod, so that the corrugated distance of the corrugated pipe sample is convenient to adjust the clamping position of the arc-shaped plate in the locating ring.

Furthermore, the tail end of the other side of the screw rod is provided with a fastening cap, and the fastening cap is positioned on the periphery of the circle of the positioning ring. The screw rod is convenient to screw or loosen.

Furthermore, the arc-shaped plate is made of elastic materials.

Furthermore, the number of the vertical rods is 4, the number of the positioning rings is 3, and 6 positioning pieces are arranged on each positioning ring. Or 4 vertical rods and 1 positioning ring, and 6 positioning pieces are arranged on the positioning ring.

Furthermore, a clamp inserted bar hole is formed in the connector of the testing machine and connected with the testing machine sensor.

The utility model has the advantages as follows:

(1) The utility model discloses a limiting plate realizes spacing to the end position of different tubular product samples. The locating ring is axially matched with the limiting plate for limiting, and radially carries out locating and clamping on pipes with different diameters and shapes. The specific positioning and clamping process is realized by adjusting a plurality of groups of screw rods, and the arc-shaped plate is clamped by the arc-shaped plate in the process of pushing the arc-shaped plate before screwing down and unscrewing the retreating arc-shaped plate. On the basis that conventional pipe adaptation degree is high, can also adjust the angle of arc through twisting moving the screw rod, have inclination's bellows to the part and also realize the adaptation centre gripping well, this centre gripping of the tubular product sample that has not only solved the pipe diameter difference, can also the centre gripping except the multiple tubular product of ordinary pipe outside, if: the application range of the clamp is greatly expanded by using various common pipe samples such as the spiral corrugated pipe, the U-shaped corrugated pipe, the C-shaped corrugated pipe, the S-shaped corrugated pipe, the V-shaped corrugated pipe and the omega-shaped corrugated pipe, the full-coverage clamping can be realized by using three sets of clamps for samples with large, medium and small pipe diameters and different pipes basically, the manufacturing or purchasing cost is greatly reduced compared with the past sets of clamps, the period for finding a suitable clamp before a test is also greatly reduced, and the test efficiency can be greatly improved.

(2) The utility model discloses in realize stabilizing the centre gripping to the multi-angle of different tubular products with the set nut cooperation of its adaptation on a plurality of holding rings and the montant. The overall use effect of the clamp is improved.

(3) The utility model discloses simple structure, raw and other materials are easy, processing is convenient, and one set of anchor clamps especially can adapt to the different tubular product of polytype and pipe diameter in the use, promote the degree of accuracy of experimental data result on the basis of guaranteeing the centre gripping effect. Has high popularization value.

Drawings

FIG. 1 is a schematic structural view of a pipe drawing force test fixture;

FIG. 2 is a schematic structural diagram of a positioning member in a pipe drawing force test fixture;

fig. 3 is another schematic structural diagram of a pipe drawing force test fixture.

The reference numbers are as follows: 1-a tester connector; 11-a clamp insert rod hole; 2-a limiting plate; 3-a positioning ring; 4-a positioning element; 41-arc-shaped plates; 42-a fastening cap; 43-screw rod; 5-vertical rod; 51-a retaining nut.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Example 1

As shown in fig. 1-2, a pipe drawing force test fixture comprises a tester connector 1, a

limiting plate

2 and 3 positioning rings 3, which are sequentially arranged from top to bottom.

The tester connector 1 is arranged at the top of the limiting plate 2.

4 vertical rods 5 are arranged between the limiting plate 2 and the positioning rings 3. The specific setting mode of the positioning ring 3 is as follows: the holding ring 3 sets up along 2 axial downward intervals of limiting plate, and 5 one ends of montant are fixed in 2 bottoms of limiting plate, and a plurality of holding rings 3 are passed in proper order to the 5 other end of montant, and the montant 5 can be followed to holding ring 3 and freely moved from top to bottom, and the position department that lies in 3 tops of holding ring and bottom on the montant 5 all is equipped with a set of set nut 51, and this set nut 51 can be twisted at will on montant 5 and move. The distance between the positioning rings 3 is adjusted through the positions of the positioning nuts 51 on the vertical rods 5, so that the corrugated distance of the corrugated pipe sample is convenient to adjust the clamping position of the arc-shaped plates 41 in the positioning rings 3.

Each positioning ring 3 is radially provided with 6 sets of positioning parts 4, each positioning part 4 comprises a screw 43 which radially penetrates through the positioning ring 3 and can be screwed, the tail end of one side of the screw 43 is provided with an arc-shaped plate 41, and the arc-shaped plates 41 are positioned in the circle of the positioning ring 3; the other end of the screw 43 is provided with a fastening cap 42, and the fastening cap 42 is positioned on the periphery of the circle of the positioning ring 3. The screw 43 can be screwed or loosened by the fastening cap 42, so as to drive the arc plate 4 to rotate to a proper angle and position.

And a clamp inserting rod hole 11 is formed in the tester connector 1, and the clamp inserting rod hole 11 is connected with a tester sensor.

The structure is more suitable for pipe samples with medium and large pipe diameters, and the types of the pipes are not limited.

Example 2

As shown in fig. 2 to 3, the difference from embodiment 1 is that only one positioning ring 3 is provided.

The structure is more suitable for pipe samples with small pipe diameters, and the types of the pipes are not limited. The small-caliber pipe is relatively simple to fix, and the fundamental 1 positioning ring 3 can meet the requirement of stable clamping of the clamp on the sample.

The working states of the clamps with different structures of the 2 embodiments are described as follows:

at first, it is fixed to utilize this anchor clamps to carry out the centre gripping to the tubular product sample, it needs to be noted that the utility model discloses anchor clamps need become two sets of complete sets of at the during operation, and the centre gripping is illustrated at the both ends of a tubular product sample respectively, now using the sample upper end as an example, and the fixed process of lower extreme is similar, so do not describe repeatedly.

Pass 6 arc 4 middle areas with the sample earlier, support in limiting plate 2 bottoms, later twist screw rod 43, make the arc be close to the sample outer wall, can tentatively realize the centre gripping to the sample with the help of the elasticity of arc 4.

If a threaded pipe is encountered, the fixing operation is carried out in one more step: at this time, the position of the positioning ring 3 on the vertical rod 5 can be further adjusted by adjusting the positioning nut 51, so that part of the positioning ring 3 can be adjusted to be clamped in the groove of the corrugated pipe, and the clamp can clamp the sample more stably.

After the arc-shaped plates 4 in each positioning ring 3 are fastened in turn, the sample is stably clamped therein.

When the test is carried out after the installation, the two tester connectors 1 at the two ends of the sample are installed on the tester, and the clamp insertion rod hole 11 is connected with the tester sensor and used for collecting a drawing force signal. And starting a testing machine to perform the test according to the rule.

After the experiment is finished, the testing machine sensor is pulled out of the clamp inserting rod hole 11, the testing machine connector 1 is detached, and the positioning piece 4 is unscrewed, so that the sample can be taken down.

And cleaning the testing machine and the clamp and then entering the test of the next sample.

The testing machine is a commercial product of any manufacturer in the prior art, and the structure, principle and use process thereof are common knowledge of those skilled in the art, and will not be described in detail herein.

Claims

1. The utility model provides a tubular product drawing force test fixture, includes testing machine connector (1), its characterized in that still includes: the positioning device comprises a limiting plate (2) and a positioning ring (3), wherein at least three vertical rods (5) are arranged between the limiting plate (2) and the positioning ring (3); the positioning ring (3) is radially provided with at least 3 sets of positioning parts (4), each positioning part (4) comprises a screw rod (43) which radially penetrates through the positioning ring (3) and can be screwed, the tail end of one side of each screw rod (43) is provided with an arc-shaped plate (41), and each arc-shaped plate (41) is positioned in a circle of the positioning ring (3); the testing machine connector (1) is arranged at the top of the limiting plate (2).

2. The pipe drawing force test fixture of claim 1, wherein: the positioning rings (3) are arranged along the limiting plate (2) in an axial downward mode, one end of the vertical rod (5) is fixed to the bottom of the limiting plate (2), and the other end of the vertical rod (5) penetrates through the positioning rings (3) in sequence.

3. A pipe drawing force test fixture as claimed in claim 1 or 2, wherein: the positioning ring (3) can freely move up and down along the vertical rod (5), and a group of positioning nuts (51) are arranged on the vertical rod (5) and positioned at the top and bottom parts of the positioning ring (3).

4. The pipe drawing force test fixture of claim 3, wherein: the tail end of the other side of the screw rod (43) is provided with a fastening cap (42), and the fastening cap (42) is positioned on the periphery of the circle of the positioning ring (3).

5. The pipe drawing force test fixture of claim 4, wherein: the arc-shaped plate (41) is made of elastic materials.

6. The pipe drawing force test fixture of claim 5, wherein: the number of the vertical rods (5) is 4, the number of the positioning rings (3) is 3, and 6 positioning pieces (4) are arranged on each positioning ring (3).

7. The pipe drawing force test fixture of claim 5, wherein: the number of the vertical rods (5) is 4, the number of the positioning rings (3) is 1, and 6 sets of positioning pieces (4) are arranged on the positioning rings (3).

8. The pipe drawing force test fixture of claim 1, wherein: be equipped with anchor clamps inserted bar hole (11) on testing machine connector (1), test machine sensor is connected in anchor clamps inserted bar hole (11).