Carbon fiber multifilament stretching protection device

Abstract

The invention relates to a carbon fiber multifilament stretching protection device which comprises a protection cover, a protection baffle and a broken filament powder collecting system, the protection cover is divided into two parts, namely a rear protection cover arranged behind a testing machine and a front protection cover arranged in front of the testing machine, and an adjustable protection baffle is arranged in the middle of the front protection cover; the protective baffle is fixed on the front protective cover through a guide rail, and the protective baffle is used for blocking splashing fiber multifilament fragments in the test process; the broken filament powder collecting system comprises a centrifugal exhaust fan and an exhaust pipe, the centrifugal exhaust fan drives an impeller to rotate through an internal motor, negative pressure is generated, gas containing fiber multifilament powder is sucked into the centrifugal exhaust fan, the centrifugal exhaust fan and the gas containing the fiber multifilament powder are connected through the exhaust pipe, and the gas containing the fiber multifilament powder is exhausted through the exhaust pipe. The exhaust pipes have enough sealing performance, and gas containing fiber multifilament powder is prevented from leaking into the environment. The device effectively isolates fiber multifilament broken fragments flying out in the stretching process, and the health of operators is protected.

Description

Technical Field

[0001] The invention relates to the field of solid rocket engines, and in particular to a carbon fiber multifilament stretching protection device. Background Art

[0002] The tensile strength of carbon fiber multifilament is measured by tensile loading the fiber after impregnation with resin and curing until it is broken. After the sample is prepared, the tensile performance test of carbon fiber multifilament is carried out on a universal material testing machine. When the ultimate strength is reached, the taut fiber will break and splash. Carbon fiber is a high-performance fiber with a carbon content of more than 95%, and has excellent properties such as high specific strength and high specific modulus. Due to the high strength of carbon fiber, its fragments have sufficient kinetic energy and fly out at high speed when broken, posing a risk of injury to operators.

[0003] In order to solve the safety hazard caused by broken fibers during the carbon fiber multifilament test, plastic sheeting was used for isolation. However, due to its poor strength and puncture resistance, it cannot effectively isolate the broken fibers of high specific strength multifilaments. In addition, the sealing of plastic sheeting is poor and cannot effectively prevent the tiny broken fibers from splashing into the air, which increases the safety hazard and affects the safety of testers, and also reduces the test efficiency.

[0004] The current carbon fiber multifilament tensile test mainly has the following safety hazards: During the tensile process, the fiber multifilament broken fragments may fly out and cause objects to hit and injure the operator. The high-strength fiber broken wires have sharp edges, which can easily cause cuts to people, and the relatively small broken wires can pierce the skin and endanger the health of the operator. The breakage will produce fine multifilament powder. Long-term inhalation of powder will cause harm to the health of the test personnel. Summary of the invention

[0005] The present invention designs a carbon fiber multifilament tensile protection device, which can better isolate and collect broken fibers after the carbon fiber multifilament is damaged, so as to solve the potential safety hazard of test personnel during the carbon fiber multifilament tensile test, thereby ensuring production efficiency and safe experimental process.

[0006] In order to solve the above technical problems, one of the purposes of the present invention is to provide a carbon fiber multifilament stretching protection device, comprising:

[0007] A protective cover 11, which is divided into two parts: a rear protective cover arranged at the rear of the test machine, which completely covers the test area; and a front protective cover arranged at the front of the test machine, wherein an adjustable protective baffle 3 is arranged in the middle of the front protective cover;

[0008] A protective baffle 3, which is fixed to the front protective cover via a guide rail 4, and the protective baffle 3 blocks fiber multifilament fragments that are splashed during the test;

[0009] A broken wire powder collection system, the broken wire powder collection system includes a centrifugal exhaust fan 10 and an exhaust pipe 6. The centrifugal exhaust fan 10 drives the impeller to rotate through an internal motor to generate negative pressure, so that the gas containing the fiber multifilament powder is sucked into the centrifugal exhaust fan 10. The centrifugal exhaust fan 10 and the gas containing the fiber multifilament powder are connected through the exhaust pipe 6. These exhaust pipes 6 should have sufficient sealing properties to prevent the gas containing the fiber multifilament powder from leaking into the environment.

[0010] Furthermore, the protective baffle 3 includes a frame 14, an upper fixed baffle 12 and a lower sliding baffle 13, the frame 14 is fixedly mounted on the guide rail 4, the upper fixed baffle 12 and the frame 14 are fixedly mounted, a sliding assembly is provided between the frame and the baffle, and the lower sliding baffle 13 can slide back and forth along the height direction of the protective baffle to cover or reveal the tensile machine fixture 1 and the sample 2.

[0011] Furthermore, the upper fixed baffle 12 is made of tempered glass and has sufficient strength and toughness.

[0012] Furthermore, the lower sliding baffle 13 is made of tempered glass or laminated glass with high light transmittance to ensure safety during the test and facilitate observation of the test process.

[0013] The above one or more technical solutions of the present invention have at least one or more of the following technical effects:

[0014] The protective cover of the present invention can effectively isolate the damaged fragments of fiber multifilaments flying out during the stretching process, prevent possible object impact and fiber breakage and cutting, and protect the health of operators.

[0015] The adjustable baffle of the present invention can adjust the position according to the working state of the stretching machine, ensure the safety during the stretching process, and can clearly observe the stretching state of the sample. The baffle is easy to adjust, ensuring the test efficiency. The board is made of high light-transmitting material so that the test personnel can clearly observe the test process.

[0016] The broken wire collection system of the present invention absorbs the multifilament powder through the exhaust pipe, thereby preventing the powder from accumulating in the working area and preventing the health of the inspectors from being harmed by the powder inhalation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : Schematic diagram of the safety protection device for the carbon fiber multifilament stretching process of the present invention;

[0018] Figure 2 : Schematic diagram of the protective baffle in working state;

[0019] Among them: 1- tensile machine fixture, 2- sample, 3- protective baffle, 4- guide rail, 5- base, 6- exhaust duct, 7- ceiling, 8- wall, 9- tripod, 10- centrifugal exhaust fan, 11- protective cover shell, 12- upper fixed baffle, 13- lower sliding baffle, 14- frame, 15- fixed connecting plate. Specific implementation plan

[0020] The present invention designs a carbon fiber multifilament stretching protection device, including a protective cover, an adjustable baffle, and a broken wire collection system. The protective cover can completely cover the test area to prevent the fiber multifilament from flying out. The protective cover is detachable, which is convenient for equipment maintenance; the adjustable baffle can adjust its position according to the working state of the stretching machine, which not only plays a protective role but also does not hinder the normal progress of the test; the broken wire collection system is provided with an exhaust duct and a fan above the protective cover to collect the fine multifilament powder generated by the test.

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the embodiments of the present invention and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the obtained embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0022] Figure 1As shown, a safety protection device for the carbon fiber multifilament stretching process of the present invention includes a protective cover, an adjustable baffle, and a broken wire powder collection system. The protective cover 11 is divided into two parts. The protective cover arranged at the rear of the testing machine completely covers the test area, and the protective cover arranged in front of the testing machine is closed on both sides, and an adjustable protective baffle 3 is provided in the middle. The adjustable protective baffle 3 is fixed to the protective cover 11 through the guide rail 4 so that the baffle position can be adjusted according to the test state. The adjustable baffle 3 can block the fiber multifilament fragments splashed during the test. The adjustable baffle includes a frame 14, an upper fixed baffle 12 and a lower sliding baffle 13. The frame 14 is fixed to the guide rail 4. The upper fixed baffle 12 is fixedly installed with the frame 14. The upper fixed baffle 12 is made of tempered glass and has sufficient strength and toughness. A sliding component is provided between the frame and the baffle. The lower sliding baffle 13 can slide back and forth along the height direction of the protective baffle to cover or reveal the tensile machine fixture 1 and the sample 2. The lower sliding baffle 13 is made of tempered glass or laminated glass with high light transmittance, which plays a safety protection role during the test and is also convenient for operators to observe the test process. The broken wire powder collection system includes a centrifugal exhaust fan 10 and an exhaust pipe 6. The centrifugal exhaust fan 10 drives the impeller to rotate through an internal motor to generate negative pressure, thereby sucking the gas containing the fiber multifilament powder into the device. The centrifugal exhaust fan 10 and the gas containing the fiber multifilament powder are connected through the exhaust pipe 6. These exhaust pipes 6 should have sufficient sealing properties to prevent the gas containing the fiber multifilament powder from leaking into the environment.

[0023] Embodiment of the present invention:

[0024] The present invention includes a protective cover arranged in the front and rear test areas of the test machine. An adjustable protective baffle is arranged in the middle of the protective cover in front of the test machine. Before the test, the lower sliding baffle is raised to the upper side along the height direction of the adjustable baffle to expose the test area of ​​the test machine, so that the operator can clamp the sample into the fixture. After the sample is placed, the lower movable baffle is lowered to the lower side along the height direction of the adjustable baffle to completely cover the test area, and the fiber multifilament fragments splashed during the test are blocked. The centrifugal exhaust fan is placed on an outdoor tripod, and the exhaust pipe connected to the input end of the centrifugal exhaust fan passes through the ceiling and is connected to the space on both sides above the test machine, so as to absorb the tiny multifilament powder in the air, avoid its accumulation in the working area, keep the environment clean, and avoid the harm of powder inhalation to the health of the test personnel. After the test, the lower sliding baffle is moved upward along the height direction of the adjustable baffle to expose the sample, and the sample after the test can be taken out.

[0025] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A carbon fiber multifilament tensile protection device, characterized in that: include: A protective cover (11), the protective cover is divided into two parts: a rear protective cover arranged at the rear of the test machine, completely covering the test area; and a front protective cover arranged at the front of the test machine, an adjustable protective baffle (3) being arranged in the middle of the front protective cover; A protective baffle (3), the protective baffle being fixed to the front protective cover via a guide rail (4), the protective baffle (3) being used to block fiber multifilament fragments that fly during the test; A broken wire powder collection system, the broken wire powder collection system comprising a centrifugal exhaust fan (10) and an exhaust pipe (6), wherein the centrifugal exhaust fan (10) drives an impeller to rotate through an internal motor to generate negative pressure, thereby sucking gas containing fiber multifilament powder into the centrifugal exhaust fan (10), and the centrifugal exhaust fan (10) and the gas containing fiber multifilament powder are connected through the exhaust pipe (6), and these exhaust pipes (6) should have sufficient sealing properties to prevent the gas containing fiber multifilament powder from leaking into the environment.

2. The carbon fiber multifilament stretching protection device according to claim 1, characterized in that: The protective baffle (3) comprises a frame (14), an upper fixed baffle (12) and a lower sliding baffle (13); the frame (14) is fixedly mounted on the guide rail (4); the upper fixed baffle (12) and the frame (14) are fixedly mounted; a sliding assembly is provided between the frame and the baffle; and the lower sliding baffle (13) can slide back and forth along the height direction of the protective baffle to cover or reveal the tensile machine fixture (1) and the sample (2).

3. The safety protection device for the carbon fiber multifilament drawing process according to claim 2 is characterized in that: The upper fixed baffle (12) is made of tempered glass and has sufficient strength and toughness.

4. The safety protection device for carbon fiber multifilament drawing process according to claim 2, characterized in that: The lower sliding baffle (13) is made of tempered glass or laminated glass with high light transmittance, which ensures safety during the test and facilitates observation of the test process.

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