CN203857924U - Electronic deformation gauge used for stress ring deformation detection and deformation detection device - Google Patents

Abstract

The utility model discloses an electronic deformation gauge for stress ring deformation detection and a stress ring deformation detection device. The electronic deformation gauge comprises: a housing; On the upper part of the fixed frame, a first slot and a guide hole are arranged on the outside of the guide fixed block; on the sliding block, a second slot is arranged on the outside of the sliding block, a guide post is provided on the top and a probe is provided on the bottom, and the guide post extends into the guide The guide hole of the fixed block can slide along the guide hole, the probe passes through the fixed frame, extends out of the shell and fixes the sliding block on the lower part of the fixed frame; the electronic extensometer, the two measuring cards of the electronic extensometer are connected with the The first slot of the block is connected to the second slot of the sliding block, and the electronic extensometer also includes a signal output assembly protruding from the shell, and the signal output assembly of the electronic extensometer is connected with the deformation measuring instrument. The stress ring deformation detection device of the present utility model utilizes the above-mentioned electronic deformation gauge.

Description

Electronic deformation gauge and deformation detection device for stress ring deformation detection

technical field

The utility model belongs to the technical field of corrosion test equipment, and more specifically relates to an electronic deformation gauge and a deformation detection device for stress ring deformation detection.

Background technique

Since stress corrosion cracking is a cracking form of metal materials subjected to a certain stress in a corrosive environment, the damage caused by it is often a brittle fracture without warning, so it is very harmful. In order to understand the stress corrosion cracking performance of metal materials, the uniaxial tensile test method is usually used for testing. This method is achieved by applying a unidirectional load to a sample mounted on a round bar and maintaining the load. The stress ring is due to its small size, Advantages such as easy operation are often used to measure loads.

When a stress ring is used to install a sample in a corrosion test, a certain load force (even if the sample is subjected to a tensile load) must be applied to the sample, and the force applied to the sample is actually through the stress ring, the sample fixture, and the stress ring. The force system composed of force nuts and force bearings exerts tension on the sample, and specifically by tightening the force bolts, the stress ring is deformed by force first. At this time, the stress ring as a whole is equivalent to an elastic body, and then the stress The restoring force after the deformation of the ring will produce a certain tensile load on the sample, and the applied tensile load can be obtained by measuring the deformation of the stress ring (that is, the deformation distance between the upper and lower measurement points). In the prior art, the instrument used to measure the deformation of the stress ring is a micrometer or a vernier caliper, and in order to ensure the accuracy of the measurement, it is necessary to ensure that the vernier caliper between the upper and lower measurement points is vertical during the measurement process; at the same time, during operation, it is necessary to Two experimenters, one is responsible for adding force, the other is responsible for measuring, and the experimenter in charge of measurement must also report the measured data to the experimenter in charge of adding force in real time, so as to control the magnitude of the added force and make the tensile strength of the sample The load meets the test requirements.

With the development of the national economy, the improvement of production levels and the improvement of product requirements, especially the development of the national nuclear power industry in recent years, there are more and more cases in which various industries need to conduct corrosion resistance tests of metal materials, and the above-mentioned use of vernier calipers or micrometers The method of manual measurement and installation of samples is not only cumbersome, but also has a large error, which makes it difficult to ensure the accuracy of measurement, and the low-efficiency detection methods are completely unable to meet the needs of high-precision production.

Utility model content

In view of the deficiencies in the prior art, the utility model aims at one or more of the above-mentioned technical problems.

The purpose of the utility model is to provide an electronic deformation gauge and deformation detection device for stress ring deformation detection with simple operation, high precision, low cost and high efficiency.

In order to achieve the above object, one aspect of the present utility model provides an electronic deformation gauge for stress ring deformation detection, the electronic deformation gauge includes: a casing; a fixing frame, the fixing frame is arranged in the casing; a guide fixed block The guide fixed block is fixed on the upper part of the fixed frame, the guide fixed block is provided with a first slot outside and a guide hole inside; the slide block is provided with a second slot outside and a guide post on the top And the bottom is provided with a probe, the guide column extends into the guide hole of the guide block and can slide along the guide hole, the probe passes through the fixing frame, extends out of the shell and fixes the slide block on the The bottom of the fixed frame; electronic extensometer, two measurement cards of the electronic extensometer are respectively connected with the first slot of the guide block and the second slot of the sliding block, and the electronic extensometer also includes an extension shell The signal output assembly of the electronic extensometer is connected with the deformation measuring instrument.

According to an embodiment of the electronic deformation gauge for stress ring deformation detection of the present invention, the two measuring cards of the electronic extensometer are respectively connected with the first slot of the guide fixed block and the second slot of the sliding block through the clip spring .

Another aspect of the utility model provides a stress ring deformation detection device, which includes a force nut, a stress ring, an upper sample holder, a lower sample holder and a base, and the stress ring is detachable fixed on the base, the upper sample holder and the lower sample holder are respectively arranged on the inner top and inner bottom of the stress ring and are used to fix the sample to be tested in the stress ring, and the booster nut is arranged on The outer top of the stress ring can be compressed and deformed or restored to its original shape by rotating the booster nut. The device also includes an upper bracket, a lower bracket and an electronic strain gauge, and the upper bracket is fixed on the top of the stress ring. On the platform surface, an electronic deformation gauge is installed on the upper bracket and the probe of the electronic deformation gauge also protrudes from one end of the upper bracket, and the lower bracket is fixed on the lower platform surface of the stress ring, and the lower bracket A measuring rod is arranged at one end of the measuring rod, and the probe is arranged opposite to the measuring rod and aligned with each other, wherein the electronic strain gauge is the above-mentioned electronic strain gauge for stress ring deformation detection.

According to an embodiment of the stress ring deformation detection device of the present invention, the upper sample fixing part and the lower sample fixing part are bolts, and the stress ring is detachably fixed on the base through the lower sample fixing part, so that The booster nut is connected to the upper end of the upper sample fixture.

According to an embodiment of the stress ring deformation detection device of the present invention, when the probe is just in contact with the measuring rod and the reading of the deformation measuring instrument is zero, the stress ring is not deformed.

According to an embodiment of the stress ring deformation detection device of the present invention, when the pressure ring is compressed and deformed, the reading of the deformation measuring instrument is the deformation amount of the stress ring.

The utility model improves the existing stress ring device, and designs an electronic deformation gauge that is easy to install and use. By adding the electronic deformation gauge and using the matching relationship between the upper and lower platforms, a more precise control is realized. Two The work of the experimenter can be completed by only one person, and the operation is simple, the precision is high, the cost is low, and the efficiency is increased several times, which has good promotion value.

Description of drawings

Fig. 1A is a schematic diagram of sample installation of the stress ring deformation detection device of the present invention.

FIG. 1B is a side view of FIG. 1A .

Fig. 2 is a schematic structural view of the electronic strain gauge for stress ring deformation detection of the present invention.

Explanation of reference signs:

1-Augmented nut, 2-Stress ring, 3-Upper sample holder, 4-Lower sample holder, 5-Base, 6-Sample to be tested, 7-Upper platform surface, 8-Lower platform surface , 9-upper bracket, 10-lower bracket, 11-electronic deformation gauge, 12-measuring rod, 13-fixing bolt,

111-Shell, 112-Fixer, 113-Guide fixed block, 1131-Guide hole, 1132-First slot, 114-Slider, 1141-Guide column, 1142-Probe, 1143-Second slot, 115- Electronic extensometer, 1151-measurement card, 1152-signal output component.

Among them, the black arrow represents the force direction of the sample, and the white arrow represents the force direction of the stress ring.

Detailed ways

Hereinafter, the electronic deformation gauge and deformation detection device for stress ring deformation detection of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a schematic structural view of the electronic strain gauge for stress ring deformation detection of the present invention. As shown in Figure 2, according to an exemplary embodiment of the present utility model, the electronic deformation gauge 11 includes a housing 111, a fixed frame 112, a guide block 113, a sliding block 114 and an electronic extensometer 115, wherein the housing 111 is used for Accommodate and support each component, the fixed frame 112 is used to support and fix the guide block 113 and the sliding block 114, the guide block 113 and the sliding block 114 cooperate with each other and transmit the deformation of the stress ring 2 synchronously through the relative displacement between the two , the electronic extensometer 115 records the relative displacement between the guide block 113 and the sliding block 114 and converts it to output the corresponding resistance value, and converts the change of the resistance value into the change of the voltage value and the amount of deformation through the deformation measuring instrument. Measure the deformation of the stress ring and finally calculate the tensile load of the sample to be tested.

Each component of the electronic deformation gauge 11 will be specifically described below.

The casing 111 is used to accommodate and support various components, as long as it has sufficient capacity and strength.

The fixing frame 112 is arranged in the housing 111 and is mainly used to support and fix the guide block 113 and the sliding block 114 , and its shape is not limited, for example, it can be half I-shaped as shown in FIG. 2 .

The guide fixed block 113 is fixed on the upper part of the fixing frame, for example, can be fixed by bolts or nuts. The guide block 113 is provided with a first card slot 1132 on the outside and a guide hole 1131 inside. The first card slot 1132 is used to fix one of the two measuring cards 1151 of the electronic extensometer 115, and the guide hole 1131 is used to guide the sliding block 114 The movement of the sliding block 114 can move along the guide hole 1131.

The outside of the sliding block 114 is provided with a second card slot 1143, the top is provided with a guide post 1141 and the bottom is provided with a probe 1142, wherein the second card slot 1143 is used to fix the other of the two measurement cards 1151 of the electronic extensometer 115, and the guide post 1141 extends into the guide hole 1131 of the guide block 113 and can slide along the guide hole 1131 , the probe 1142 passes through the fixed frame 112 , protrudes from the shell 111 and fixes the sliding block 114 on the lower part of the fixed frame 112 .

The two measuring cards 1151 of the electronic extensometer 115 are respectively connected to the first card slot 1132 of the guide block 113 and the second card slot 1143 of the sliding block 114, and the electronic extensometer 115 also includes a signal output assembly 1152 protruding from the housing 111 For example, the signal output component 1152 may include an output line and an output terminal, and the signal output component 1152 is connected to a deformation measuring instrument (not shown).

Specifically, the other ends of the two measurement cards 1151 of the electronic extensometer 115 are respectively fastened to the two horizontal branches of the C-shaped elastic element in the protective box of the electronic extensometer, and the vertical branches of the C-shaped elastic element are attached to There are four resistance strain gauges and form a full-bridge circuit. When the two measurement cards 1151 move relative to each other with the deformation of the stress ring, the vertical part of the C-shaped elastic element is bent and deformed, and the resistance value of the resistance strain gauge on it changes. , is output to the deformation measuring instrument by the signal output component 1152, and the change of the resistance value is converted into a voltage value change signal through the electronic amplification circuit in the deformation measuring instrument, and the stress ring deformation (that is, the voltage value) can be read through its digital display screen. Convert and adjust to millimeter value), and the output signal of the deformation measuring instrument can also be input to the computer through the 232 serial port, and the deformation of the stress ring can be read through the computer display screen. The above is the basic measurement principle of the electronic extensometer 115 , which will not be described in detail here.

When the probe 1142 protruding from the electronic extensometer touches a certain plane and is subjected to a downward pressure load, the guide column 1141 of the sliding block 114 will move along the guide hole 1131 of the guide fixed block 113 and generate a displacement, then the electronic extensometer 115 The two measuring cards 1151 also move accordingly and transmit the generated displacement signal to the electronic extensometer 11, and the electronic extensometer 11 transmits the signal of the resistance change to the deformation measuring instrument, and the deformation measuring instrument converts the resistance change into a voltage change and outputs The amount of deformation of the stress ring, thus the above-mentioned electronic strain gauge can be used to detect the deformation of the stress ring.

In order to ensure that the measurement accuracy is not affected when the electronic deformation gauge 11 is subjected to vibration, the two measuring cards 1142 of the electronic extensometer 11 are respectively connected to the first slot 1132 of the guide fixed block 113 and the first slot 1132 of the sliding block 114 through a spring (not shown). The two card slots 1143 are connected.

The stress ring deformation detection device of the present invention uses the above-mentioned electronic deformation gauge for stress ring deformation detection. Specifically, FIG. 1A is a schematic diagram of sample installation of the stress ring deformation detection device of the present invention, and FIG. 1B is a side view of FIG. 1A .

As shown in Figure 1A and Figure 1B, according to an exemplary embodiment of the present utility model, the stress ring deformation detection device includes a force nut 1, a stress ring 2, an upper sample holder 3, and a lower sample holder 4 and base 5.

Wherein, the stress ring 2 is detachably fixed on the base 5, and the structure and material of the stress ring 3 can be the same as those in the prior art. The upper sample holder 3 and the lower sample holder 4 are respectively arranged on the inner top and inner bottom of the stress ring 2 and are used to fix the sample 6 to be tested in the stress ring 2. According to the present invention, the upper sample holder 3 And the lower sample fixing part 4 is a bolt, and the sample 6 to be tested can be well fixed by the bolt. But the present invention is not limited thereto, for example, components such as a sample holder can also be used to fix the sample 6 to be tested. Moreover, the stress ring 2 is detachably fixed on the base 5 through the lower sample fixing part 4 , and then further fixed and adjusted through the nuts sleeved on the lower sample fixing part 4 .

The reinforcing nut 3 is arranged on the outer top of the stress ring 2 , and the stress ring 2 can be compressed and deformed or restored to its original shape by rotating the reinforcing nut 3 . According to the present invention, the booster nut 3 is connected to the upper end of the upper sample holder 3, a gasket or a nut can also be arranged between the booster nut 3 and the upper sample holder 3, and then the booster nut can be rotated to 3 Realize the application or unloading of the stress ring 2.

The above-mentioned device also includes an upper bracket 9 , a lower bracket 10 and an electronic deformation gauge 11 . The present invention utilizes the upper and lower platform surfaces of the stress ring 2 as the fixed point of the relative moving point, that is, as the upper and lower measurement points, and then fixes the upper bracket 9 and the lower bracket 10 respectively on the upper and lower platform surfaces and sets the The electronic deformation gauge 11 can measure the deformation of the stress ring 2 .

Specifically, the upper bracket 9 is fixed on the upper platform surface 7 of the stress ring 2, the electronic deformation gauge 11 is installed on the upper bracket 9 and the probe 1142 of the electronic deformation gauge extends out of one end of the upper bracket 9, and the lower bracket 10 is fixed on the stress ring 2 On the lower platform surface 8, one end of the lower support 10 is provided with a measuring rod 12, and the probe 1142 is arranged opposite to the measuring rod 12 and the two are aligned with each other. According to the present invention, the upper bracket 9 and the lower bracket 10 can be fixed by fixing bolts 13 .

When installing the sample, ensure that the probe 1142 is just in contact with the measuring rod 12 and the reading of the deformation measuring instrument is zero, the stress ring is not deformed, that is, the zero calibration is performed, and then the entire deformation detection device can work normally. Then, after a certain amount of force is applied to the stress ring 2 (along the direction of the white arrow), the electronic extensometer records the displacement and outputs a signal, and the deformation measuring instrument converts the signal and outputs the deformation detection result. The reading of the deformation measuring instrument is the stress The amount of ring deformation, and then the tensile load (along the direction of the black arrow) on the sample to be tested can be calculated according to the relevant function, and the corresponding tensile load can be adjusted in real time according to the required tensile load during the installation of the sample. The magnitude of the applied force of the force ring is convenient, fast and accurate.

To sum up, the electronic deformation gauge and stress ring deformation detection device for stress ring deformation detection of the utility model realize the rapid and accurate measurement of the deformation of the stress ring through simple structural improvements, reducing the workload of the operator. Simultaneously, the operation is simple, the precision is high, the cost is low, the efficiency is high, and the effect is good.

Although the electronic strain gauge for detecting stress ring deformation and the device for detecting stress ring deformation of the present utility model have been described above in conjunction with exemplary embodiments, it should be clear to those skilled in the art that without departing from the spirit and scope of the claims , various modifications can be made to the above-described embodiments.

Claims (6)

1. An electronic strain gauge for stress ring deformation detection, characterized in that, the electronic strain gauge comprises: shell; a fixing frame, the fixing frame is arranged in the shell; A guide fixed block, the guide fixed block is fixed on the upper part of the fixed frame, and the outside of the guide fixed block is provided with a first slot and the inside is provided with a guide hole; A sliding block, the outside of the sliding block is provided with a second slot, the top is provided with a guide post and the bottom is provided with a probe, and the guide post extends into the guide hole of the guide block and can slide along the guide hole, so The probe passes through the fixing frame and extends out of the shell and fixes the sliding block on the lower part of the fixing frame; An electronic extensometer, the two measurement cards of the electronic extensometer are respectively connected to the first slot of the guide block and the second slot of the sliding block, and the electronic extensometer also includes a signal output assembly protruding from the shell, so The signal output component of the electronic extensometer is connected with the deformation measuring instrument. 2. The electronic strain gauge for stress ring deformation detection according to claim 1, characterized in that, the two measuring cards of the electronic extensometer are respectively connected to the first slot of the guide fixed block and the first slot of the sliding block through a jumper spring. Two card slot connection. 3. A stress ring deformation detection device, said device comprising a booster nut, a stress ring, an upper sample holder, a lower sample holder and a base, said stress ring is detachably fixed on the base, said The upper sample holder and the lower sample holder are respectively arranged on the inner top and inner bottom of the stress ring and are used to fix the sample to be tested in the stress ring. Rotating the booster nut can cause the stress ring to undergo compression deformation or restore its original shape, and it is characterized in that, The device also includes an upper bracket, a lower bracket and an electronic deformation gauge, the upper bracket is fixed on the upper platform of the stress ring, the electronic deformation gauge is installed on the upper bracket and the probe of the electronic deformation gauge is also from One end of the upper bracket protrudes, the lower bracket is fixed on the lower platform surface of the stress ring, one end of the lower bracket is provided with a measuring rod, and the probe and the measuring rod are arranged opposite and aligned with each other, Wherein, the electronic strain gauge is the electronic strain gauge for stress ring deformation detection according to any one of claims 1-2. 4. The stress ring deformation detection device according to claim 3, characterized in that, the upper sample holder and the lower sample holder are bolts, and the stress ring is detachably fixed on the lower sample holder through the lower sample holder. On the base, the reinforcing nut is connected with the upper end of the upper sample fixing part. 5 . The stress ring deformation detection device according to claim 3 , wherein the stress ring is not deformed when the probe is just in contact with the measuring rod and the reading of the deformation measuring instrument is zero. 6 . 6 . The stress ring deformation detection device according to claim 3 , characterized in that, when the pressure ring is compressed and deformed, the reading of the deformation measuring instrument is the deformation amount of the stress ring. 7 .