Large-tow carbon fiber winding tension gradient monitoring and testing device

Abstract

The utility model discloses a large tow carbon fiber winding tension gradient monitoring and testing device which comprises a first retainer and a second retainer which are oppositely arranged at an interval, one side of the first retainer far away from the second retainer is a first arc-shaped surface, and one side of the second retainer far away from the first retainer is a second arc-shaped surface. The first arc-shaped surface and the second arc-shaped surface have the same radius and the arc length is smaller than a semi-arc; the tension and pressure sensor is located between the first holder and the second holder and supports the first holder and the second holder so that the first arc-shaped face and the second arc-shaped face can be located on the same whole arc face. The large-tow carbon fibers can be wound on the first arc-shaped surface and the second arc-shaped surface to form a large-tow carbon fiber winding layer. According to the large-tow carbon fiber winding device, large-tow carbon fibers can be wound on the first arc-shaped surface and the second arc-shaped surface to form a large-tow carbon fiber winding layer, the tension gradient and the final tension value in the winding process can be measured by measuring the tension change of each layer of carbon fibers through the tension and pressure sensor, and the use amount of the carbon fibers can be optimized.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a device for monitoring and testing the tension gradient of large-tow carbon fiber winding. Background Technology

[0002] Commercial vehicle hydrogen cylinders primarily employ a structure with a large-tow carbon fiber fully wound aluminum alloy inner liner, known as Type III cylinders. These cylinders possess high explosion pressure resistance and good stability. The outer carbon fiber layer of the Type III cylinder is the main factor bearing the cylinder pressure and is crucial to the cylinder's safety and stability. The thicker and denser the carbon fiber winding, the better the cylinder's explosion resistance, but this significantly increases manufacturing costs. Manufacturers aim to minimize carbon fiber usage while meeting cylinder performance requirements to improve economic efficiency. Currently, many companies rely on experience and simulation calculations to determine the optimal carbon fiber usage, lacking a proven testing method for determining the optimal amount of carbon fiber. Utility Model Content

[0003] This invention provides a device for monitoring and testing the tension gradient of large-tow carbon fiber winding to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A device for monitoring and testing the tension gradient of large-tow carbon fiber winding includes: a first retainer, a second retainer, and a tension / compression sensor; the first and second retainers are arranged opposite to each other and spaced apart, the side of the first retainer away from the second retainer is a first arc-shaped surface, and the side of the second retainer away from the first retainer is a second arc-shaped surface, the first and second arc-shaped surfaces have the same radius and the arc length of each is less than half an arc; the tension / compression sensor is located between the first and second retainers, one end of the tension / compression sensor is connected to the first retainer and the other end is connected to the second retainer, the tension / compression sensor supports the first and second retainers so that the first and second arc-shaped surfaces are located on the same full arc surface; large-tow carbon fiber can be wound around the first and second arc-shaped surfaces to form a large-tow carbon fiber winding layer.

[0006] Preferably, the first arc-shaped surface and the second arc-shaped surface have the same arc length and are symmetrically arranged.

[0007] Preferably, the first retainer includes: a first arc-shaped plate, a first transverse support, and a first longitudinal support; both ends of the first transverse support are respectively fixed to the inner arc surface of the first arc-shaped plate facing the second retainer; the first longitudinal support is located between the first transverse support and the first arc-shaped plate, with one end of the first longitudinal support fixedly connected to the first arc-shaped plate and the other end fixedly connected to the first transverse support.

[0008] Preferably, the second retainer includes: a second arc-shaped plate, a second transverse support, and a second longitudinal support; both ends of the second transverse support are respectively fixed to the inner arc surface of the second arc-shaped plate facing the first retainer; the second longitudinal support is located between the second transverse support and the second arc-shaped plate, with one end of the second longitudinal support fixedly connected to the second arc-shaped plate and the other end fixedly connected to the second transverse support.

[0009] Preferably, a wooden pad is provided between the tension / compression sensor and the first retainer.

[0010] Preferably, a telescopic adjustable connector is provided between the first retainer and the second retainer. The telescopic adjustable connector is detachably provided and can drive the first retainer and the second retainer to move towards each other and away from each other.

[0011] Preferably, the telescopic adjustable connector includes: a first screw connecting a first retainer, a pull nut, and a second screw connecting a second retainer; the pull nut connects the first screw and the second screw.

[0012] Preferably, there are two sets of tension and compression sensors, which are arranged on both sides of the telescopic adjustable connector.

[0013] Preferably, the tension / compression sensor is an S-type tension / compression sensor.

[0014] Beneficial effects:

[0015] The large-tow carbon fiber winding tension gradient monitoring and testing device disclosed in this application sets a tension and pressure sensor between a first retainer and a second retainer, so that the large-tow carbon fiber can be wound around the first arc surface of the first retainer and the second arc surface of the second retainer to form a large-tow carbon fiber winding layer. By measuring the tension change of each layer of carbon fiber wound by the tension and pressure sensor, the tension gradient and the final tension value during the winding process can be measured, which helps to optimize the amount of carbon fiber used. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a large-tow carbon fiber winding tension gradient monitoring and testing device disclosed in this utility model;

[0018] Figure 2 This is a front view of a large-tow carbon fiber winding tension gradient monitoring and testing device disclosed in this utility model;

[0019] Figure 3 This is a schematic diagram of the first and second retainers of a large-tow carbon fiber winding tension gradient monitoring and testing device disclosed in this utility model.

[0020] 1. First retainer; 11. First arc-shaped plate; 12. First lateral support; 13. First longitudinal support; 2. Second retainer; 21. Second arc-shaped plate; 22. Second lateral support; 23. Second longitudinal support; 3. Tension / compression sensor; 4. Large tow carbon fiber winding layer; 5. Wooden pad; 6. Telescopic adjustable connector; 61. First screw; 62. Pull nut; 63. Second screw; 7. First arc-shaped surface; 8. Second arc-shaped surface. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] A device for monitoring and testing the tension gradient of large-tow carbon fiber winding, combined with Figure 1 , Figure 2 and Figure 3As shown, the device includes: a first retainer 1, a second retainer 2, and a tension / compression sensor 3. The first retainer 1 and the second retainer 2 are positioned opposite each other and spaced apart. The side of the first retainer 1 away from the second retainer 2 is a first arc-shaped surface 7, and the side of the second retainer 2 away from the first retainer 1 is a second arc-shaped surface 8. The first arc-shaped surface 7 and the second arc-shaped surface 8 have the same radius and their arc lengths are both less than half an arc. The tension / compression sensor 3 is located between the first retainer 1 and the second retainer 2. One end of the tension / compression sensor 3 is connected to the first retainer 1, and the other end is connected to the second retainer 2. The tension / compression sensor 3 supports the first retainer 1 and the second retainer 2, thereby placing the first arc-shaped surface 7 and the second arc-shaped surface 8 on the same complete arc surface. Large-tow carbon fibers can be wound around the first arc-shaped surface 7 and the second arc-shaped surface 8 to form a large-tow carbon fiber winding layer 4. By setting the tension / compression sensor 3 between the first retainer 1 and the second retainer 2, and by placing the first arc-shaped surface 7 on the outer side of the first retainer 1 and the second arc-shaped surface 8 on the outer side of the second retainer 2 on the same complete arc surface, large-tow carbon fibers can simulate the winding of an aluminum alloy inner liner to form a large-tow carbon fiber winding layer 4. During the winding process, the tension of each layer of carbon fiber exerts a force on the first retainer 1 and the second retainer 2. This force change is detected by the tension sensor 3, allowing for the measurement of the tension change with each layer of carbon fiber. This enables the measurement of the tension gradient and the final tension value during the winding process, which helps optimize the amount of carbon fiber used. This monitoring and testing device can partially replace finite element calculations and prototype testing, shortening the product development cycle and reducing the amount and cost of carbon fiber materials used. Furthermore, this monitoring and testing device has a clever structure, low cost, and small footprint, allowing for easy portability. Its overall weight is less than 10 kg, making it unrestricted by application site or environment, and facilitating market promotion.

[0023] Specifically, the first retainer 1 and the second retainer 2 are made of aluminum alloy to replicate the mechanical properties of the aluminum alloy inner liner wrapped with large-tow carbon fiber.

[0024] Preferably, the first arc-shaped surface 7 and the second arc-shaped surface 8 have the same arc length and are symmetrically arranged, and the two ends of the first retainer 1 and the two ends of the second retainer 2 form an equal distance, so that the force applied by the large tow carbon fiber is uniformly applied to the first retainer 1 and the second retainer 2.

[0025] Preferably, the tension / compression sensor 3 is an S-type tension / compression sensor, which can both detect tension / compression and provide some support.

[0026] Preferably, the first retainer 1 includes: a first arc-shaped plate 11, a first transverse support 12, and a first longitudinal support 13; both ends of the first transverse support 12 are fixed to the inner arc surface of the first arc-shaped plate 11 facing the second retainer 2; the first longitudinal support 13 is located between the first transverse support 12 and the first arc-shaped plate 11, with one end of the first longitudinal support 13 fixedly connected to the first arc-shaped plate 11 and the other end fixedly connected to the first transverse support 12. This strengthens the first retainer 1 and facilitates connection with the tension / compression sensor 3, allowing the first retainer 1 to transmit force to the tension / compression sensor 3.

[0027] Preferably, the second retainer 2 includes: a second arc-shaped plate 21, a second lateral support 22, and a second longitudinal support 23; both ends of the second lateral support 22 are respectively fixed to the inner arc surface of the second arc-shaped plate 21 facing the first retainer 1; the second longitudinal support 23 is located between the second lateral support 22 and the second arc-shaped plate 21, with one end of the second longitudinal support 23 fixedly connected to the second arc-shaped plate 21 and the other end fixedly connected to the second lateral support 22. This strengthens the second retainer 2 and facilitates connection with the tension / compression sensor 3, allowing the second retainer 2 to transmit force to the tension / compression sensor 3.

[0028] Preferably, a wooden pad 5 is provided between the tension / compression sensor 3 and the first retainer 1 to protect the tension / compression sensor 3.

[0029] Specifically, the two ends of the S-type tension / compression sensor are connected to the first retainer 1 and the second retainer 2 respectively via M10 connecting bolts. The connecting bolts pass through the first transverse support 12 and the pad 5 and are then screwed into the threaded hole at the top of the S-type tension / compression sensor. The connecting bolts pass through the second transverse support 22 and are then screwed into the threaded hole at the bottom of the S-type tension / compression sensor.

[0030] Preferably, a telescopic adjustable connector 6 is provided between the first retainer 1 and the second retainer 2. The telescopic adjustable connector 6 is detachably provided and can drive the first retainer 1 and the second retainer 2 to move towards each other and away from each other. The relative distance between the first retainer 1 and the second retainer 2 can be adjusted by the telescopic adjustable connector 6.

[0031] Preferably, the telescopic adjustable connector 6 includes: a first screw 61 connecting the first retainer 1, a pull nut 62, and a second screw 63 connecting the second retainer 2; the pull nut 62 connects the first screw 61 and the second screw 63. Rotating the pull nut 62 in the forward direction brings the first screw 61 and the second screw 63 closer together, thereby causing the first retainer 1 and the second retainer 2 to move closer together. Rotating the pull nut 62 in the reverse direction moves the first screw 61 and the second screw 63 further apart, thereby causing the first retainer 1 and the second retainer 2 to move further apart. This allows the monitoring and testing device to not only monitor the tension gradient change during carbon fiber winding but also to test the explosion-proof performance after winding, thereby verifying the influence of different winding tensions on the performance of the gas cylinder.

[0032] Specifically, the first screw 61 and the first retainer 1 can be fixedly connected by screws or by welding, and the second screw 63 and the second retainer 2 can be fixedly connected by screws or by welding. The heads of the first screw 61 and the second screw 63 are machined with external threads, and the threads are turned in opposite directions; the inner walls of the pull nut 62 are machined with reverse internal threads at both ends, thereby realizing the opposite and opposite movements of the first screw 61 and the second screw 63 through the pull nut 62.

[0033] Preferably, there are two sets of tension and compression sensors 3, which are arranged on both sides of the telescopic adjustable connector 6. Both sets of tension and compression sensors 3 can monitor the changes in winding tension.

[0034] The working principle of the device in this application is as follows:

[0035] During the large-tow carbon fiber winding process, the telescopic adjustable connector 6 needs to be removed. By rotating the pull nut 62, the pull nut 62 can be removed from the first screw 61 and the second screw 63. After each layer of carbon fiber is wound, two S-shaped tension and pressure sensors monitor the changes in winding tension in real time until the last layer of carbon fiber is wound, and detect the changes in pressure gradient throughout the entire process.

[0036] In the explosion-proof test, a telescopic adjustable connector 6 needs to be installed. By rotating the pull nut 62, the first screw 61 and the second screw 63 are moved away from each other. The first screw 61 and the second screw 63 drive the first retainer 1 and the second retainer 2 to move away from each other. As the first screw 61 and the second screw 63 move away from each other, the first retainer 1 and the second retainer 2 drive the two S-shaped tension and compression sensors to extend, thereby collecting load changes in real time. Until the large tow carbon fiber winding layer 4 breaks, the value of the S-shaped tension and compression sensor can be converted into the maximum explosion-proof pressure value allowed by the winding tension gradient.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for monitoring and testing the tension gradient of large-tow carbon fiber winding, characterized in that, include: The first retainer (1), the second retainer (2), and the tension / compression sensor (3) are arranged opposite to each other and spaced apart. The side of the first retainer (1) away from the second retainer (2) is a first arc-shaped surface (7), and the side of the second retainer (2) away from the first retainer (1) is a second arc-shaped surface (8). The first arc-shaped surface (7) and the second arc-shaped surface (8) have the same radius and the arc length is less than half an arc. The tension / compression sensor (3) is located between the first retainer (1) and the second retainer (2). One end of the tension / compression sensor (3) is connected to the first retainer (1), and the other end is connected to the second retainer (2). The tension / compression sensor (3) supports the first retainer (1) and the second retainer (2), thereby making the first arc-shaped surface (7) and the second arc-shaped surface (8) located on the same full arc surface. Large tow carbon fibers can be wound around the first arc-shaped surface (7) and the second arc-shaped surface (8) to form a large tow carbon fiber winding layer (4).

2. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 1, characterized in that, The first arc surface (7) and the second arc surface (8) have the same arc length and are symmetrically arranged.

3. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 1, characterized in that, The first retainer (1) includes: a first arc-shaped plate (11), a first transverse support (12) and a first longitudinal support (13); the two ends of the first transverse support (12) are respectively fixed on the inner arc surface of the first arc-shaped plate (11) facing the second retainer (2); the first longitudinal support (13) is located between the first transverse support (12) and the first arc-shaped plate (11), and one end of the first longitudinal support (13) is fixedly connected to the first arc-shaped plate (11) and the other end is fixedly connected to the first transverse support (12).

4. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 3, characterized in that, The second retainer (2) includes: a second arc-shaped plate (21), a second transverse support (22) and a second longitudinal support (23); the two ends of the second transverse support (22) are respectively fixed on the inner arc surface of the second arc-shaped plate (21) facing the first retainer (1); the second longitudinal support (23) is located between the second transverse support (22) and the second arc-shaped plate (21), and one end of the second longitudinal support (23) is fixedly connected to the second arc-shaped plate (21) and the other end is fixedly connected to the second transverse support (22).

5. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 1, characterized in that, A wooden pad (5) is provided between the tension / compression sensor (3) and the first retainer (1).

6. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 1, characterized in that, A telescopic adjustable connector (6) is provided between the first retainer (1) and the second retainer (2). The telescopic adjustable connector (6) is detachably provided and can drive the first retainer (1) and the second retainer (2) to move towards each other and away from each other.

7. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 6, characterized in that, The telescopic adjustable connector (6) includes: a first screw (61) connecting the first retainer (1), a pull nut (62) and a second screw (63) connecting the second retainer (2); the pull nut (62) connects the first screw (61) and the second screw (63).

8. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 7, characterized in that, The tension and compression sensors (3) are in two sets, and the two sets of tension and compression sensors (3) are arranged on both sides of the telescopic adjustable connector (6).

9. The device for monitoring and testing the tension gradient of large-tow carbon fiber winding according to claim 1, characterized in that, The tension / compression sensor (3) is an S-type tension / compression sensor.

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