CN2811993Y - Tensile force measuring rack for high-temperature superconductive strip - Google Patents

Abstract

A high-temperature superconducting strip tensile test frame, including an upper terminal [1], a support column [2], a lower terminal [3], a welding plate [4], a strip to be tested [5], and a fastening bolt [ 6]; the upper terminal [1] and the lower terminal [3] are L-shaped red copper plates, which are respectively located at the upper end and the lower end of the test frame, and are used to connect with the current lead, the clamp of the force device and the tested belt. The material [5] is connected, and is connected with the support column [2] through the fastening bolt [6]. Welding plates [4] for welding strips are vertically welded on the opposite faces of the horizontal plates of the upper and lower terminals, and the two ends of the measured strips [5] are welded on the upper and lower welding plates [4]. The fixture of the force adding device clamps the intersection part of the horizontal plate of the upper and lower terminal terminals and the vertical line of the strip to be tested, and applies tension to the entire test frame. The support column [2] is in the shape of [, and is connected between the upper terminal [1] and the lower terminal [3] with fastening bolts [6], parallel to the measured strip [5] in the vertical direction; this practical The new type makes the strip under test easy to install and can protect the strip from being broken during installation.

Description

High temperature superconducting strip tensile test stand

technical field

The utility model patent relates to a high-temperature superconducting strip tension testing device, in particular to a superconducting strip tension testing rack for superconducting strip tension testing.

Background technique

High-temperature superconducting strips work in a liquid nitrogen environment, so testing various properties of high-temperature superconducting strips needs to be carried out in a liquid nitrogen environment. One of the tests is to study the effect of tensile strain on the properties of high-temperature superconducting strips Influence, that is, apply a tensile force to the strip to test whether the properties such as the current carrying capacity of the high-temperature superconducting strip are reduced. The tensile test device used to measure the tensile properties of high-temperature superconducting strips is mainly composed of a computer, a data acquisition card, a gradient amplifier, a magnet, a force device, various sensors and signal amplifiers, etc. The stress and strain on the sample are determined by the force sensors and displacement sensors are obtained. To use this tensioning device to test a generally strong strip, it only needs to be directly clamped to the fixture of the force device. However, since the material of the high-temperature superconducting strip is oxide ceramics, the powder sleeve method ( PIT), the grains are weakly connected, so the strength of the high-temperature superconducting strip is low, it is not easy to fix during installation, the mechanical strength is poor, and it is easy to break during the installation process, so the tensile properties of the superconducting strip should be tested. , there must be a test frame device that can protect the superconducting strip from being broken during installation, and connect the superconducting sample to the fixture of the force device through the test device. There is currently no device for attaching a superconducting sample to a force-exerting device.

Utility model content

The purpose of the test frame of the utility model is to install the strip to be tested on it, and protect the superconducting strip from being broken during the installation process, and the test frame is connected with the force device of the tensile test device.

The test frame of the utility model adopts the following technical scheme: the strip to be tested is welded on the connecting terminal of the test frame of the utility model, and there is a supporting body with sufficient strength on the test frame, so that the strip to be tested is easy to install and can protect the strip during installation. is not broken.

The test frame of the utility model comprises six parts of an upper connection terminal, a support body, a lower connection terminal, a welding plate, a strip to be tested and fastening bolts.

The upper terminal and the lower terminal are L-shaped red copper plates, which are respectively located at the upper and lower ends of the test frame, and are used to connect with the current lead, the clamp of the force device and the strip to be tested, and are connected to the support by fastening bolts. The columns are joined together. The vertical plates of the upper terminal and the lower terminal are provided with holes for connecting with the current leads, and the horizontal plates are provided with holes at the joints with the support column for passing through the fastening bolts. Welding plates for welding strips are vertically welded on the opposite surfaces of the horizontal plates of the upper and lower terminals. The welding plates are copper plates, and the two ends of the measured strips are welded on the upper and lower welding plates. The jig of the force adding device clamps the intersection of the horizontal plate of the upper and lower terminal blocks and the vertical line of the strip to be tested, and applies tension to the entire test frame.

The support body is in the shape of [, and the upper and lower horizontal support plates are provided with concave openings to insert fastening bolts to connect the support body between the upper terminal and the lower terminal. The fastening bolt connects the upper and lower terminals to the support Body compacted. The supporting body is parallel to the tested strip in the vertical direction, so that the tested strip is easy to install and can protect the strip from being broken during installation. The material of the supporting body is a metal material with appropriate strength to ensure that the upper and lower terminals There is no relative displacement when the test frame of the utility model is installed on the tensile test device. Fastening bolts are used to connect the support body and the upper and lower terminals. After the strip is welded, the test frame of the utility model is installed on the tensile test device, and the clamp of the force device is clamped to the plate in the horizontal direction of the upper and lower connecting terminals near one end of the strip. Then loosen the upper and lower fastening bolts, hold the support body with your hand so that it will not move towards the direction of the strip to avoid damaging the strip, then remove the upper and lower fastening bolts vertically, and remove the support body from the direction opposite to the strip. Tensile tests can be performed.

Description of drawings

Fig. 1a is a front view of the structure of a specific embodiment of the test stand of the present invention, and Fig. 1b is a side view of the structure of a specific embodiment of the test stand of the present invention.

In the figure, 1 is the upper connection terminal, 2 is the supporting body, 3 is the lower connection terminal, 4 is the welding plate, 5 is the strip to be tested, and 6 is the fastening bolt.

Detailed ways

The test frame of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

The test frame of the utility model comprises an upper connection terminal 1, a support body 2, a lower connection terminal 3, a welding plate 4, a measured strip 5, and six parts such as fastening bolts 6.

The mechanical strength of the superconducting strip is not large, and the maximum tensile force applied by the force applying device is 250N. Therefore, in this embodiment, the upper terminal 1 and the lower terminal 3 are made of copper plates with good electrical conductivity. The thickness of the copper is 2mm, which can meet the requirements of the tensile strength and the magnitude of the current passed. The upper connecting terminal 1 and the lower connecting terminal 3 are respectively located at the upper end and the lower end of the test frame, and the shape is L-shaped. There are holes for connecting with the current leads on the vertical plate, and the horizontal plate is connected with the support column. There are holes in the connection. The strip 5 to be tested is welded vertically between two welding plates 4, and the welding plates 4 are vertically welded on the plate in the horizontal direction opposite to the upper and lower connecting terminals. In this embodiment, the distance between the welding plates is 80 mm, and the strip to be tested should have a welding length, which is about 110 mm. The support body 2 is [-shaped. In this embodiment, the length of the vertical direction of the support body 2 is 160mm, and the upper and lower support plates in the horizontal direction have concave openings to insert the fastening bolt 6 to connect it to the upper terminal 1. Between the lower connection terminal 3 and the lower connection terminal 3, the fastening bolt 6 compresses the upper and lower connection terminals 1, 3 and the support body 2 tightly. The supporting body 2 is vertically parallel to the strip to be tested 5, so that the strip to be tested is easy to install and can protect the strip from being broken during installation. Fastening bolts 6 connect the support body 2 and the upper and lower connection terminals 1 and 3 .

The working process of the utility model test stand is as follows:

Under the environment of room temperature, the sample 5 of the high-temperature superconducting strip to be tested is vertically welded on the welding plate 4 of the test frame of the utility model.

Clamp the fixture of the force-applying device of the tensile test device to the end of the strip near the horizontal plate of the upper and lower terminals of the tested strip.

Connect the current leads to the connection holes of the upper connection terminal 1 and the lower connection terminal 3 of the test frame of the present invention respectively.

Loosen the upper and lower fastening bolts 6, hold the support body 2 with your hand so that it will not move towards the direction of the strip to avoid damaging the strip, then remove the upper and lower fastening bolts 6 vertically, and translate from the direction opposite to the measured strip 5 Remove support body 2.

Add liquid nitrogen into the measuring tank, so that all strips 5 to be tested are immersed in the liquid nitrogen environment. After the strip 5 to be tested reaches the temperature of liquid nitrogen, apply a tension to the strip to be tested with a force-applying device, measure the magnitude of the tension applied to the strip to be tested, and then measure the tension of the high-temperature superconducting strip 5 in this state Each performance parameter below. Gradually increase the tension value on the tested strip, and test the performance parameters of the tested strip under the tension state until the tested strip is broken. In this embodiment, the maximum tensile force applied to the strip can reach 250N. At least ten experiments have been done with the test stand of the utility model. The test stand has achieved the expected function of protecting the superconducting strip, and can also withstand the maximum tensile force applied on the high-temperature superconducting strip without deformation.

After the measurement, loosen the fixture on the force adding device, remove the current lead, remove the test frame, place it at room temperature and return to room temperature, remove the tested strip, and then install the support body with fastening bolts. On the test frame of the utility model, another tested sample is replaced, and the above test process is repeated.

Claims (2)

1, a kind of belt material of high temperature superconduct tensile test frame is characterized in that it comprises upper connecting terminal [1], support column [2], lower connecting terminal [3], welded plate [4], tested band [5], fastening bolt [6]; Upper connecting terminal [1] and lower connecting terminal [3] are the L-shaped copper plate of shape, lay respectively at the top and bottom of testing jig, have the hole that is connected in order to current feed on upper connecting terminal [1] and lower connecting terminal [3] vertical plate, have the hole with the support column junction on the leveling board; Vertically be welded with the welded plate [4] that welding of belt is used on the opposite face of last lower connecting terminal [1], [3] leveling board, welded plate [4] is a copper plate, and the two ends of tested band [5] are welded on up and down on the welded plate [4]; Support column [2] parallels at vertical direction with tested band [5]; Fastening bolt [6] connects support column [2] and last lower connecting terminal [1], [3], and is connected with augmentor; The jig chucking of augmentor is gone up lower connecting terminal [1], [3] and tested band vertical curve intersection.

2, according to the described belt material of high temperature superconduct tensile test of claim 1 frame, it is characterized in that described support column [2] makes with metal material, be [shape, open the spill mouth on the back up pad of two horizontal directions up and down, fastening bolt [6] snaps in the spill mouth support column [2] is connected between upper connecting terminal [1] and the lower connecting terminal [3].