A stress detection device applied to single carbon fiber

Abstract

The application belongs to the technical field of composite material performance testing, and discloses a stress detection device applied to single carbon fiber, which comprises a shell, an analysis display control screen is fixedly installed on the front face of the shell, an I-shaped seat is clamped on one side of the shell, a hydraulic cavity is formed in the lower part of the interior of the shell, and an oil return pipe is fixedly installed in the middle part of the hydraulic cavity. Through the arrangement of the pressure sensor one and the infrared distance measuring component one, the hydraulic oil is pumped by the hydraulic oil pump to make the T-shaped rod and the clamping mechanism move outward, so that the tensile force is applied to the carbon fiber, the greater the moving distance of the clamping mechanism, the greater the tensile force applied to the carbon fiber, and the air pressure in the hydraulic shell one is increased, the air pressure in the hydraulic shell one is measured by the pressure sensor one to indirectly measure the tensile force of the carbon fiber, and the elongation of the carbon fiber is measured by the two infrared distance measuring components one, so that the tensile force and the elongation of the carbon fiber are measured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of composite material performance testing, and particularly relates to a stress detection device applied to single carbon fiber. BACKGROUND

[0002] Carbon fiber is an important component of advanced composite materials, has inherent characteristics of carbon materials, has excellent mechanical properties, and has soft processability of textile fibers, and has been the focus of attention since its birth. Carbon fiber is widely used in the fields of aerospace, automobile, building, medical treatment and the like.

[0003] As a new type of composite material, the tensile property of carbon fiber is an important mechanical property index for evaluating the performance of carbon fiber, and is also the most common material performance evaluation index. When the mechanical property of carbon fiber is tested, the experimental mechanical cost of a DIC-3D strain measurement solution is high, and because the carbon fiber is thin and brittle and high-strength and low-tensile fiber, the elongation and modulus of the carbon fiber are difficult to accurately test. An ordinary tensile testing machine cannot meet the requirements of the tensile experiment of carbon fiber, and the ordinary tensile testing machine can only perform tensile experiments and cannot perform carbon fiber pressure and bending deformation experiments. SUMMARY

[0004] The purpose of the present application is to provide a stress detection device applied to single carbon fiber to solve the problems in the background.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a stress detection device applied to single carbon fiber, comprising a shell, a front surface of the shell is fixedly installed with an analysis display control screen, one side of the shell is clamped with a I-shaped seat, a hydraulic cavity is formed in the lower part of the inside of the shell, a return oil pipe is fixedly installed in the middle part of the hydraulic cavity, a return oil valve is fixedly installed in the inside of the return oil pipe, a hydraulic pump is fixedly connected to the side of the inside of the shell away from the I-shaped seat, an oil inlet pipe is fixedly connected to the lower part of the hydraulic pump, the oil inlet pipe is communicated with the hydraulic cavity, a main oil channel is formed in the side of the hydraulic pump close to the I-shaped seat, a circular oil channel communicated with the main oil channel is formed in the middle part of the I-shaped seat, two rectangular bases are fixedly connected to the side of the I-shaped seat away from the shell, a hydraulic shell one is fixedly installed on one side of each of the two rectangular bases, a pressure sensor one is fixedly installed on the outside of each of the two hydraulic shell ones, a T-shaped rod is movably sleeved in the middle part of each of the two hydraulic shell ones, a clamping mechanism is fixedly installed on the inside of each of the two T-shaped rods, an infrared distance measuring component one is fixedly connected to the side of each of the two clamping mechanisms close to the I-shaped seat, a connecting pipe is fixedly connected to the side of each of the two hydraulic shell ones close to the I-shaped seat, and an electromagnetic valve one is fixedly installed on the inside of the side of each of the two connecting pipes away from the hydraulic shell one.

[0006] Preferably, the two sides of the main oil channel are provided with C-shaped oil channels, the middle parts of the two C-shaped oil channels are fixedly installed with electromagnetic valves two, the side of the shell close to the I-shaped seat is provided with two symmetrical arc-shaped oil cavities, the I-shaped seat is fixedly connected with two symmetrical partition plates, the side of the I-shaped seat away from the shell is fixedly connected with a telescopic base, the side of the telescopic base away from the I-shaped seat is fixedly connected with a hydraulic shell two, the back of the hydraulic shell two is fixedly connected with a pressure sensor two, the middle part of the hydraulic shell two is movably sleeved with a pressure rod, the middle part of the side of the pressure rod away from the hydraulic shell two is fixedly installed with an infrared distance measuring component two, the front of the pressure rod is fixedly connected with a reflecting plate, the side of the hydraulic shell two close to the I-shaped seat is fixedly connected with a telescopic pipe one, the side of the telescopic pipe one away from the hydraulic shell two is movably sleeved with a telescopic pipe two fixedly connected with the I-shaped seat, and the middle part of the telescopic pipe two is fixedly connected with an electromagnetic valve three.

[0007] Preferably, the hydraulic cavity is filled with more than half of the hydraulic oil, and the main oil channel, the circular oil channel, the C-shaped oil channel, the telescopic pipe one, the telescopic pipe two and the connecting pipe are filled with hydraulic oil.

[0008] Preferably, the inside of the hydraulic shell one on the side of the two T-shaped rods away from the pressure sensor one is filled with hydraulic oil, the inside of the hydraulic shell one on the side of the two T-shaped rods close to the pressure sensor one is filled with air, the inside of the hydraulic shell two on the side of the pressure rod away from the pressure sensor two is filled with hydraulic oil, and the inside of the hydraulic shell two on the side of the pressure rod close to the pressure sensor two is filled with air.

[0009] Preferably, the inside of the arc-shaped oil cavity on the side of the two partition plates away from the C-shaped oil channel is filled with air.

[0010] Preferably, the contact surface of the shell and the I-shaped seat has good sealing effect, the pressure sensor one and the hydraulic shell one have good sealing property, and the pressure sensor two and the hydraulic shell two have good sealing property.

[0011] Preferably, the connecting pipe is communicated with the circular oil channel, and the telescopic pipe two is communicated with the circular oil channel.

[0012] The beneficial effects of the present application are as follows:

[0013] 1、The present application is provided with the pressure sensor one and the infrared distance measuring component one, the T-shaped rod and the clamping mechanism are moved outward by the hydraulic oil pumped by the hydraulic oil pump, so as to exert tension on the carbon fiber, the greater the moving distance of the clamping mechanism, the greater the tension exerted on the carbon fiber, and the air pressure in the hydraulic shell one is increased, the tension of the carbon fiber is indirectly measured by the pressure sensor one, and the elongation of the carbon fiber is measured by the two infrared distance measuring components one, so as to meet the measurement of the tension and the elongation of the carbon fiber.

[0014] 2, The present application is through the setting of arc oil cavity and baffle, through the hydraulic oil work piece rotates ninety degrees, that is, the carbon fiber position is horizontal, the pressure on the carbon fiber is applied through the pressure rod, so as to carry out the carbon fiber pressure test, the pressure and the bending deformation of the carbon fiber are measured and recorded by pressure sensor two and infrared distance measuring component two, so as to meet the experiment of carbon fiber pressure and bending deformation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the schematic diagram of the structure appearance of the present application;

[0016] Figure 2 It is the left view of the structure of the present application;

[0017] Figure 3 It is the main oil way sectional view of the present application;

[0018] Figure 4 It is the C-shaped oil way sectional view of the present application;

[0019] Figure 5 It is the pressure rod sectional view of the present application;

[0020] Figure 6 It is the present application Figure 5 The enlarged view at A in the present application;

[0021] Figure 7 It is the arc oil cavity sectional view of the present application.

[0022] In the figure: 1, shell; 2, analysis display control screen; 3, work seat; 4, hydraulic pump; 5, oil inlet pipe; 6, hydraulic cavity; 7, main oil way; 8, circular oil way; 9, rectangular base; 10, hydraulic shell one; 11, pressure sensor one; 12, T-shaped rod; 13, clamping mechanism; 14, infrared distance measuring component one; 15, connecting pipe; 16, electromagnetic valve one; 17, C-shaped oil way; 18, electromagnetic valve two; 19, baffle; 20, arc oil cavity; 21, telescopic base; 22, pressure sensor two; 23, hydraulic shell two; 24, pressure rod; 25, infrared distance measuring component two; 26, reflecting plate; 27, telescopic pipe one; 28, telescopic pipe two; 29, electromagnetic valve three; 30, oil return pipe; 31, oil return valve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] As Figures 1 to 7As shown, the embodiment of the present application provides a kind of force detection device applied to single carbon fiber, including shell 1, the front of shell 1 is fixedly installed with analysis display control screen 2, one side of shell 1 is clamped with I-shaped seat 3, the inside lower portion of shell 1 is equipped with hydraulic cavity 6, the middle portion of hydraulic cavity 6 is fixedly installed with return oil pipe 30, the inside of return oil pipe 30 is fixedly installed with return oil valve 31, the inside of shell 1 is fixedly connected with hydraulic pump 4 away from I-shaped seat 3, the lower portion of hydraulic pump 4 is fixedly connected with oil inlet pipe 5, oil inlet pipe 5 is communicated with hydraulic cavity 6, the side of hydraulic pump 4 close to I-shaped seat 3 is equipped with main oil way 7, the middle portion of I-shaped seat 3 is equipped with circular oil way 8 communicated with main oil way 7, the side of I-shaped seat 3 away from shell 1 is fixedly connected with two rectangular bases 9, the side of two rectangular bases 9 is fixedly installed with hydraulic shell one 10, the outside of two hydraulic shell ones 10 is fixedly installed with pressure sensor one 11, the middle portion of two hydraulic shell ones 10 is movably sleeved with T-shaped rod 12, the inside of two T-shaped rods 12 is fixedly installed with clamping mechanism 13, the side of two clamping mechanisms 13 close to I-shaped seat 3 is fixedly connected with infrared distance measuring component one 14, its function is that infrared distance measuring component one 14 sends infrared, after reflection by the reflecting sheet on another infrared distance measuring component one 14, infrared distance measuring component one 14 receives the reflected infrared, to measure the distance between two infrared distance measuring component one 14, continuously send infrared, the continuity distance change that can be measured, the side of two hydraulic shell ones 10 close to I-shaped seat 3 is fixedly connected with connecting pipe 15, the inside side of two connecting pipes 15 away from hydraulic shell one 10 is fixedly installed with electromagnetic valve one 16.

[0025] Two C-shaped oil channels 17 are arranged on both sides of the main oil channel 7, and the middle part of each C-shaped oil channel 17 is fixedly installed with an electromagnetic valve 18; the side of the shell 1 close to the I-shaped seat 3 is provided with two symmetrical arc-shaped oil chambers 20; the I-shaped seat 3 is fixedly connected with two symmetrical partition plates 19; the side of the I-shaped seat 3 away from the shell 1 is fixedly connected with an extension base 21; the side of the extension base 21 away from the I-shaped seat 3 is fixedly connected with a hydraulic shell 23; the back of the hydraulic shell 23 is fixedly connected with a pressure sensor 22; the pressure sensor 22 emits infrared rays and receives the infrared rays reflected by the reflecting plate to measure the distance; the pressure sensor 22 continuously emits infrared rays, and the measurable continuous distance changes; the middle part of the hydraulic shell 23 movably sleeved with a pressing rod 24; the middle part of the side of the pressing rod 24 away from the hydraulic shell 23 is fixedly installed with an infrared distance measuring component 25; the front of the pressing rod 24 is fixedly connected with a reflecting plate 26; the side of the hydraulic shell 23 close to the I-shaped seat 3 is fixedly connected with an extension pipe 27; the side of the extension pipe 27 away from the hydraulic shell 23 movably sleeved with an extension pipe 28 fixedly connected with the I-shaped seat 3; the middle part of the extension pipe 28 is fixedly connected with an electromagnetic valve 29; the extension base 21 can adjust the distance between the pressing rod 24 and the I-shaped seat 3, so that the carbon fiber is conveniently installed and the single carbon fiber tension test is not hindered; the pressure sensor 11 and the pressure sensor 22 can measure the change of the air pressure; the change of the air pressure has a linear relationship with the force of the carbon fiber, so that the force of the carbon fiber is indirectly measured.

[0026] The hydraulic oil is filled in more than half of the hydraulic cavity 6, and the main oil channel 7, the circular oil channel 8, the C-shaped oil channel 17, the extension pipe 27, the extension pipe 28 and the connecting pipe 15 are filled with hydraulic oil; the pump oil amount of the hydraulic pump 4 can be controlled, so that the tension between the two T-shaped rods 12 and the pressure of the pressing rod 24 are controlled.

[0027] The inside of the hydraulic shell 10 away from the pressure sensor 11 is filled with hydraulic oil, and the inside of the hydraulic shell 10 close to the pressure sensor 11 is filled with air; when the hydraulic oil in one side of the hydraulic shell 10 increases, the T-shaped rod 12 is pushed to move outward, and the air in the other side of the hydraulic shell 10 is extruded, so that the air pressure increases; when the hydraulic oil in one side of the hydraulic shell 10 decreases, the compressed air in the other side of the hydraulic shell 10 pushes the T-shaped rod 12 to reset; the inside of the hydraulic shell 23 away from the pressure sensor 22 is filled with hydraulic oil, and the inside of the hydraulic shell 23 close to the pressure sensor 22 is filled with air; when the hydraulic oil in one side of the hydraulic shell 23 increases, the pressing rod 24 is pushed to move outward, and the air in the other side of the hydraulic shell 23 is extruded, so that the air pressure increases; when the hydraulic oil in one side of the hydraulic shell 23 decreases, the compressed air in the other side of the hydraulic shell 23 pushes the pressing rod 24 to reset.

[0028] Wherein, two baffle 19 away from the side of the C-shaped oil channel 17 arc-shaped oil cavity 20 full of air inside, its role is the main oil way hydraulic oil C-shaped oil channel 17 into the arc-shaped oil cavity 20, push baffle 19 counterclockwise, extrude arc-shaped oil cavity 20; when the amount of hydraulic oil in arc-shaped oil cavity 20 decreases, compressed air will push baffle 19 clockwise to the initial position.

[0029] Wherein, the shell 1 and the contact surface of the work-shaped seat 3 good sealing effect, its role is to prevent hydraulic oil in the main oil way 7 and the circular oil channel 8 and arc-shaped oil cavity 20 place occurs leakage, the gas in the arc-shaped oil cavity 20 compression will not leak, so as to ensure that the baffle 19 close to the side of the C-shaped oil channel 17 hydraulic oil decreases, compressed air will push baffle 19 and the work-shaped seat 3 rotation back to the initial position; pressure sensor 11 and the hydraulic shell 10 between the good sealing, its role is to ensure that the air in the hydraulic shell 10 is compressed by T-shaped rod 12 will not leak, so as to ensure the accuracy of the test and the hydraulic shell 10 in the hydraulic oil quantity decreases, push T-shaped rod 12 reset; pressure sensor 22 and the hydraulic shell 23 between the good sealing, its role is to ensure that the air in the hydraulic shell 23 is compressed by pressure rod 24 will not leak, so as to ensure the accuracy of the test and the hydraulic shell 23 in the hydraulic oil quantity decreases, push pressure rod 24 reset.

[0030] Wherein, the connecting pipe 15 and the circular oil channel 8 communication, its role is the electromagnetic valve in the connecting pipe 15 open, the hydraulic oil in the circular oil channel 8 can enter the connecting pipe 15 and the hydraulic shell 10 from the power transmission; telescopic pipe 28 and the circular oil channel 8 communication, its role is the electromagnetic valve in the telescopic pipe 28 open, the hydraulic oil in the circular oil channel 8 can enter the telescopic pipe 28, telescopic pipe 27 and the hydraulic shell 23 from the power transmission.

[0031] Working principle and use process:

[0032] When the single carbon fiber tension test is performed, the two ends of the single carbon fiber are clamped in the clamping mechanism 13, the control analysis display control panel 2 is controlled, the hydraulic pump 4, the two electromagnetic valves one 16 and the two infrared distance measuring components one 14 are opened, the hydraulic oil in the hydraulic cavity 6 is pumped into the main oil way by the hydraulic pump 4 through the oil inlet pipe 5, the hydraulic oil in the main oil way 7 enters the hydraulic shell one 10 through the circular oil way 8, the electromagnetic valve one 16 and the connecting pipe 15, so that the T-shaped rod 12 and the clamping mechanism 13 move outward to stretch the carbon fiber, when the two clamping mechanisms 13 make the single carbon fiber in the vertical original length state, the pressure value of the pressure sensor one 11 and the distance of the two infrared distance measuring components one 14 are recorded as the initial value, the hydraulic pump 4 continues to supply oil, the pressure sensor one 11 and the two infrared distance measuring components one 14 continuously record the values until the carbon fiber is broken, the hydraulic pump 4 is closed, the oil return valve 31 is opened, the compressed gas in the hydraulic shell one 10 pushes the T-shaped rod 12 to reset, in the process, the hydraulic oil returns to the hydraulic cavity 6 through the oil return valve 31 and the oil return pipe 30, when the value of the pressure sensor one 11 changes to the value when it is opened, the oil return valve 31 is closed.

[0033] When the single carbon fiber tension test is performed, the two ends of the single carbon fiber are clamped in the clamping mechanism 13, the control analysis display control panel 2 is controlled, the hydraulic pump 4, the two electromagnetic valves one 16 and the two infrared distance measuring components one 14 are opened, the hydraulic oil in the hydraulic cavity 6 is pumped into the main oil way by the hydraulic pump 4 through the oil inlet pipe 5, the hydraulic oil in the main oil way 7 enters the hydraulic shell one 10 through the circular oil way 8, the electromagnetic valve one 16 and the connecting pipe 15, so that the T-shaped rod 12 and the clamping mechanism 13 move outward to stretch the carbon fiber, when the two clamping mechanisms 13 make the single carbon fiber in the vertical original length state, the pressure value of the pressure sensor one 11 and the distance of the two infrared distance measuring components one 14 are recorded as the initial value, the hydraulic pump 4 continues to supply oil, the pressure sensor one 11 and the two infrared distance measuring components one 14 continuously record the values until the carbon fiber is broken, the hydraulic pump 4 is closed, the oil return valve 31 is opened, the compressed gas in the hydraulic shell one 10 pushes the T-shaped rod 12 to reset, in the process, the hydraulic oil returns to the hydraulic cavity 6 through the oil return valve 31 and the oil return pipe 30, when the value of the pressure sensor one 11 changes to the value when it is opened, the oil return valve 31 is closed.

[0034] The analysis display control panel 2 analyzes the recorded values to draw a broken line graph about the carbon fiber test.

[0035] It has to be noted that, in the present document, the terms "first", "second", etc. merely serve to identify a subject or action, without necessarily requiring or implying any such actual relationship or order between such subjects or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] While embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations of the embodiments can be undertaken without departing from the spirit and scope of the present application, which is defined by the appended claims and their equivalents.

Claims

1. A force detection device for a single carbon fiber, comprising a housing (1), wherein an analysis display and control screen (2) is fixedly mounted on the front side of the housing (1), characterized in that: A I-shaped seat (3) is snapped onto one side of the housing (1). A hydraulic chamber (6) is opened at the lower part of the interior of the housing (1). A return oil pipe (30) is fixedly installed in the middle of the hydraulic chamber (6). A return oil valve (31) is fixedly installed inside the return oil pipe (30). A hydraulic pump (4) is fixedly connected to the side of the housing (1) away from the I-shaped seat (3). An oil inlet pipe (5) is fixedly connected below the hydraulic pump (4). The oil inlet pipe (5) communicates with the hydraulic chamber (6). A main oil passage (7) is opened on the side of the hydraulic pump (4) near the I-shaped seat (3). A circular oil passage (8) communicating with the main oil passage (7) is opened in the middle of the I-shaped seat (3). A fixed connection is made to the side of the I-shaped seat (3) away from the housing (1). There are two rectangular bases (9), and a hydraulic housing (10) is fixedly installed on one side of each of the two rectangular bases (9). A pressure sensor (11) is fixedly installed on the outer side of each of the two hydraulic housings (10). A T-shaped rod (12) is movably sleeved in the middle of each of the two hydraulic housings (10). A clamping mechanism (13) is fixedly installed on the inner side of each of the two T-shaped rods (12). An infrared ranging component (14) is fixedly connected to the side of each of the two clamping mechanisms (13) near the I-shaped base (3). A connecting pipe (15) is fixedly connected to the side of each of the two hydraulic housings (10) near the I-shaped base (3). A solenoid valve (16) is fixedly installed on the inner side of each of the two connecting pipes (15) away from the hydraulic housing (10).

2. The force detection device for a single carbon fiber according to claim 1, characterized in that: C-shaped oil passages (17) are provided on both sides of the main oil passage (7). Solenoid valves (18) are fixedly installed in the middle of the two C-shaped oil passages (17). Two symmetrical arc-shaped oil chambers (20) are provided on the side of the housing (1) near the I-shaped seat (3). Two symmetrical partitions (19) are fixedly connected to the I-shaped seat (3). A telescopic base (21) is fixedly connected to the side of the I-shaped seat (3) away from the housing (1). A hydraulic housing (23) is fixedly connected to the side of the telescopic base (21) away from the I-shaped seat (3). A pressure sensor (22) is fixedly connected to the back of the hydraulic housing (23). A pressure rod (24) is movably sleeved in the middle of the hydraulic housing 2 (23). An infrared ranging component 2 (25) is fixedly installed in the middle of the side of the pressure rod (24) away from the hydraulic housing 2 (23). A reflector plate (26) fixedly connected to the I-shaped base (3) is installed in front of the pressure rod (24). A telescopic tube 1 (27) is fixedly connected in the side of the hydraulic housing 2 (23) close to the I-shaped base (3). A telescopic tube 2 (28) fixedly connected in the side of the telescopic tube 1 (27) away from the hydraulic housing 2 (23) is movably sleeved in the middle of the telescopic tube 2 (28) and fixedly connected to the I-shaped base (3). A solenoid valve 3 (29) is fixedly connected in the middle of the telescopic tube 2 (28).

3. The force detection device for a single carbon fiber according to claim 2, characterized in that: The hydraulic chamber (6) is filled with more than half of the hydraulic oil, and the main oil passage (7), circular oil passage (8), C-shaped oil passage (17), telescopic pipe one (27), telescopic pipe two (28), and connecting pipe (15) are filled with hydraulic oil.

4. The force detection device for a single carbon fiber according to claim 2, characterized in that: The hydraulic housing 1 (10) on the side of the two T-shaped rods (12) away from the pressure sensor 1 (11) is filled with hydraulic oil, and the hydraulic housing 1 (10) on the side of the two T-shaped rods (12) close to the pressure sensor 1 (11) is filled with air. The hydraulic housing 2 (23) on the side of the pressure rod (24) away from the pressure sensor 2 (22) is filled with hydraulic oil, and the hydraulic housing 2 (23) on the side of the pressure rod (24) close to the pressure sensor 2 (22) is filled with air.

5. The force detection device for a single carbon fiber according to claim 2, characterized in that: The arc-shaped oil cavity (20) on the side of the two partitions (19) away from the C-shaped oil passage (17) is filled with air.

6. The force detection device for a single carbon fiber according to claim 2, characterized in that: The sealing effect of the contact surface between the housing (1) and the I-shaped seat (3) is good, the sealing between the pressure sensor one (11) and the hydraulic housing one (10) is good, and the sealing between the pressure sensor two (22) and the hydraulic housing two (23) is good.

7. The force detection device for a single carbon fiber according to claim 2, characterized in that: The connecting pipe (15) is connected to the circular oil passage (8), and the telescopic pipe (28) is connected to the circular oil passage (8).

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