Device and method for dynamically adjusting tension of ceramic fiber heat treatment bundle wire

Abstract

The invention discloses a device and a method for dynamically adjusting the tension of a ceramic fiber heat treatment bundle filament, the device comprises a heat treatment furnace, a fixing device and a telescopic device, and further comprises a tension adjusting device, the tension adjusting device comprises a movable end cover, a fixed end cover and a tension supporting device positioned between the movable end cover and the fixed end cover; the tension supporting device is in sliding connection with the movable end cover and the fixed end cover. The fixed end cover is fixedly connected with the fixed device, the movable end cover is connected with the fixed device through the telescopic device, and the movable end cover and the fixed end cover are oppositely arranged; the telescopic device drives the movable end cover to move, then the axial distance between the movable end cover and the fixed end cover is adjusted, the tension supporting device shrinks evenly in the radial direction along with increasing of the axial distance between the movable end cover and the fixed end cover, and therefore uniform tension with the consistent orientation is provided for different shrinkage degrees of fibers.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber tension regulation, in particular to a device and method for dynamically regulating the tension of ceramic fiber bundles subjected to heat treatment. Background Art

[0002] Ceramic fiber is a new material that can be used in extreme environments such as high temperature or ultra-high temperature oxidation erosion, radiation, etc. It is of great significance to solve the material bottleneck problem currently faced by cutting-edge weapons in aerospace and national defense.

[0003] Fiber heat treatment has an important impact on product performance. In the ceramic fiber production process, heat treatment is a necessary step for the transformation of raw silk fibers into ceramic fibers. During the fiber heat treatment process, the dynamic control of the fiber tension in the furnace is an important parameter that directly affects the quality and performance of the finished continuous fiber. During the heat treatment of fiber bundles, the shrinkage amplitude of the fiber varies greatly at different temperature stages of the heat treatment furnace, depending on the degree of heat treatment such as temperature, time, and atmosphere. Existing fiber heat treatment kilns and tension shrinkage devices cannot provide uniform and consistent tension according to the different shrinkage degrees of the fibers at different stages of fiber shrinkage, resulting in intermittent changes in the performance of the continuous fiber. In severe cases, phenomena such as breakage, pulverization, and hardening may occur, which will lead to differences in the crystallinity and orientation of the continuous fiber, causing the fiber strength to show intermittent performance differences and fail to meet the subsequent fiber use requirements. Summary of the Invention

[0004] In response to the above problems, the present invention designs a dynamic adjustment device for the tension of a ceramic fiber heat-treated bundle, comprising a heat treatment furnace, a fixing device, and a telescopic device, and also comprising a tension adjustment device, the tension adjustment device comprising a movable end cover, a fixed end cover, and a tension support device located between the movable end cover and the fixed end cover, the tension support device being slidably connected to the movable end cover and the fixed end cover respectively;

[0005] The fixed end cover is fixedly connected to the fixing device, the movable end cover is connected to the fixing device via a telescopic device, and the movable end cover and the fixed end cover are arranged opposite to each other.

[0006] Compared with the prior art, the beneficial effects of the present invention are: the movable end cover is driven to move by the telescopic device, thereby adjusting the axial distance between the movable end cover and the fixed end cover, and the tension support device shrinks radially and uniformly as the axial distance between the movable end cover and the fixed end cover increases, thereby providing uniform and consistently oriented tension for different degrees of fiber shrinkage.

[0007] Furthermore, the tension support device is composed of N support plates with arcs, and the N support plates form a cylinder;

[0008] Preferably, the support plate is provided with a first sliding portion and a second sliding portion at both ends close to the movable end cover and the fixed end cover, the first sliding portion is in sliding cooperation with the movable end cover, and the second sliding portion is in sliding cooperation with the fixed end cover.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: by setting a support plate with an arc, multiple support plates are formed into a cylinder, so that the fiber to be tested can be evenly wound on the outer surface of the tension support device. When the movable end cover moves to the side away from the fixed end cover, the first sliding part on the support plate slides with the movable end cover, and the second sliding part slides with the fixed end cover, causing the support plate to shrink radially.

[0010] Furthermore, the movable end cover includes a frustum 1, and N guide grooves 1 are provided on the side surface of the frustum 1, and the guide grooves 1 are slidably matched with the first sliding part.

[0011] Preferably, a pull rod is provided along the axial direction of the truncated table, and the pull rod is fixedly connected to the telescopic device.

[0012] Furthermore, the fixed end cover is a frustum 2, and the side surface of the frustum 2 is provided with N guide grooves 2, and the guide grooves 2 are slidably matched with the second sliding part.

[0013] Preferably, the second frustum is provided with a fixing rod along the axial direction, the fixing rod is fixedly connected to the fixing device, and the fixing rod and the pull rod are located in the same axial direction;

[0014] More preferably, one end of the fixing rod is connected to the second frustum, one end of the pull rod is connected to the first frustum, and the other end of the pull rod is sleeved on the outside of the fixing rod away from the second frustum.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the movable end cover is formed into a cone one, and a guide groove one is provided on the side of the cone one, so that the first sliding part slides in the guide groove one, thereby guiding one side of the support plate; by providing a guide groove two on the side of the cone two, the second sliding part slides in the guide groove two, thereby guiding the other side of the support plate, so that multiple support plates are gathered or dispersed, thereby adjusting the diameter of the tension support device; by the other end of the pull rod being sleeved on the outside of the fixed rod away from the cone two, when the support plate contracts, the distance between the movable end cover and the fixed end cover increases, and the fixed rod moves inside the pull rod, thereby preventing the movable end cover and the fixed end cover from offsetting in the same axial direction.

[0016] Furthermore, the first sliding portion includes a first limiting member and a first supporting member, the first limiting member is slidably matched with the guide groove, and the first supporting member is fixedly connected to the supporting plate and the first limiting member respectively;

[0017] Preferably, the first limiting member is a horizontal bar, and the first supporting member is a vertical bar.

[0018] Furthermore, the second sliding portion includes a second limiting member and a second supporting member, the second limiting member is slidably engaged with the second sliding groove, and the second supporting member is fixedly connected to the support plate and the second limiting member respectively;

[0019] Preferably, the second limiting member is a horizontal bar, and the second supporting member is a vertical bar.

[0020] The beneficial effect of adopting the above-mentioned further technical solution is: the first sliding part includes a first limit member and a first support member, and the second sliding part includes a second limit member and a second support member, so that the first limit member slides in the guide groove 1, and the second limit member slides in the second sliding groove, providing guidance for the support plate, so that multiple support plates can be gathered or dispersed.

[0021] Furthermore, the telescopic device includes a transmission mechanism and a power mechanism;

[0022] The transmission mechanism is connected to the pull rod and the power mechanism respectively;

[0023] The transmission mechanism includes one of a telescopic air cylinder, a telescopic oil cylinder, and an elastic device;

[0024] or

[0025] The transmission mechanism includes a screw, a nut sleeved outside the screw and a transmission shaft; the nut is connected to the pull rod, the screw is connected to the transmission shaft, and the transmission shaft is connected to the power mechanism; the frustum is connected to a frustum bracket, the fixing device is provided with a slide groove, and the frustum bracket is slidably connected to the slide groove.

[0026] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the telescopic mechanism includes a transmission mechanism and a power mechanism, the transmission mechanism is connected to the pull rod and the power mechanism respectively, and the power mechanism drives the transmission mechanism to achieve telescoping, thereby driving the pull rod to move; when the transmission mechanism includes a screw, a nut sleeved outside the screw and a transmission shaft, the power mechanism drives the screw to rotate, so that the nut moves along the axial direction of the screw, thereby driving the table 1 to move along the axial direction of the screw, and the table 1 is connected to a table bracket, and the fixing device is provided with a slide groove, and the table bracket is slidably connected to the slide groove, and the table 1 is limited by the fixing device to prevent the table 1 from rotating during the movement, thereby ensuring the stable movement of the movable end cover.

[0027] Furthermore, the fixing device includes a limiting mechanism and a support rod, and the length of the support rod is not less than the radius of the second bottom surface of the frustum;

[0028] Preferably, the limiting mechanism includes a support platform, and the slide groove is arranged on the support platform;

[0029] More preferably, the fixing rod is fixedly connected to the supporting rod.

[0030] The beneficial effects of adopting the above-mentioned further technical solution are as follows: a support platform is provided through the fixing device, and a slide groove is provided on the support platform, so that the movable end cover slides in the slide groove, ensuring the stable movement of the movable end cover; a support rod is provided through the fixing device, and the length of the support rod is not less than the radius of the second bottom surface of the cone, which can support the fixed end cover so that the fiber covering on the tension support device will not fall to the ground.

[0031] Furthermore, it also includes an automatic control device, the automatic control device includes a pressure sensor and a PLC system, and the pressure sensor is in contact with the support plate;

[0032] The pressure sensor and the power mechanism are electrically connected to the PLC system; the pressure parameters obtained by the pressure sensor are processed and converted into processing information by the PLC system, and the speed adjustment of the power mechanism is controlled to realize the axial movement of the pull rod.

[0033] The beneficial effects of adopting the above-mentioned further technical solution are: by providing a pressure sensor, the pressure sensor is in contact with the support plate, thereby detecting the tension of the fiber when it shrinks on the support plate, and the PLC system receives the pressure parameters transmitted by the pressure sensor and the speed of the power device, and then adjusts the distance between the movable end cover and the fixed end cover, thereby reducing the diameter of the tension support device, so that each part of the fiber is under tension control that matches the shrinkage rate, thereby achieving crystallization and orientation requirements.

[0034] A method for dynamically adjusting the tension of a ceramic fiber heat treatment bundle comprises the following steps: Step 1: Winding the ceramic fiber onto a support plate, winding one end of the ceramic fiber onto the support plate, and then winding the remaining part onto the support plate, and the fixed end of the ceramic fiber will not break as the support plate shrinks; Step 2: Adjusting the temperature in the heat treatment furnace to heat the ceramic fiber, detecting the induced pressure data transmitted by the pressure sensor 6, and transmitting the pressure induced data to a PLC system; Step 3: After the PLC system receives the pressure induced data, the PLC system compares the received induced pressure data with a preset pressure parameter. When the induced pressure data is greater than the preset pressure parameter, the PL System C controls the retraction of the telescopic device; Step 4: After the telescopic device retracts and receives the retraction signal from the PLC system, the power mechanism drives the transmission mechanism to retract, and the transmission mechanism drives the pull rod to move away from the fixed end cover, thereby moving the movable end cover away from the fixed end cover, and the first limit member slides along guide groove one, and the second limit member slides along guide groove two, and the first limit member and the second limit member drive the support plate from the maximum diameter end of frustum one and frustum two to the minimum diameter end, thereby causing the support plate to retract radially; Step 5: The PLC system compares the received induced pressure data with the preset pressure parameters. When the induced pressure data is equal to the preset pressure parameters, the transmission mechanism stops retracting.

[0035] The beneficial effect of adopting the above-mentioned further technical solution is: the induced pressure data of the ceramic fiber at different temperatures is transmitted to the PLC system through the pressure sensor, and the PLC system controls the contraction of the telescopic device according to the pressure sensing data, thereby increasing the axial distance between the movable end cover and the fixed end cover, causing the support plate to shrink radially, so that the tension of various parts of the ceramic fiber at high temperature is evenly released, thereby achieving the purpose of adjusting the tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a front view of a device for dynamically adjusting the tension of a ceramic fiber heat-treated bundle;

[0037] Figure 2 It is a three-dimensional structural diagram of the tension adjustment device;

[0038] Figure 3 It is a front view of the tension adjustment device;

[0039] Figure 4 It is a three-dimensional structural diagram of the support plate and the sliding part;

[0040] Figure 5 It is a front view of a transmission mechanism;

[0041] Among them: 1. Heat treatment furnace; 2. Movable end cover; 3. Fixed end cover; 4. Support plate; 5. First sliding part; 6. Second sliding part; 7. Round table one; 8. Guide groove one; 9. Pull rod; 10. Round table two; 11. Guide groove two; 12. Fixed rod; 13. First limit member; 14. First support member; 15. Second limit member; 16. Second support member; 17. Transmission mechanism; 18. Power mechanism; 19. Screw; 20. Nut; 21. Transmission shaft; 22. Round table bracket; 23. Support rod; 24. Support table; 25. Slide; 26. Pressure sensor; 27. PLC system. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0043] Example 1:

[0044] The present embodiment provides a dynamic adjustment device for the tension of a ceramic fiber heat treatment bundle, including a heat treatment furnace 1, a fixing device and a telescopic device, and a tension adjustment device, the tension adjustment device including a movable end cover 2, a fixed end cover 3 and a tension support device located between the movable end cover 2 and the fixed end cover 3, the tension support device is slidably connected to the movable end cover 2 and the fixed end cover 3 respectively, the tension support device is composed of N support plates 4 with an arc, and the N support plates 4 are surrounded by a cylinder; preferably, the support plate 4 is close to the movable end cover 2 and the fixed end cover 3 is provided with a first sliding portion 5 and a second sliding portion 6 at both ends, the first sliding portion 5 is in sliding cooperation with the movable end cover 2, and the second sliding portion 6 is in sliding cooperation with the fixed end cover 3; by providing a support plate 4 with an arc, multiple support plates 4 are surrounded by a cylinder, so that the fiber to be tested can be evenly wound on the outer surface of the tension support device. When the movable end cover 2 moves to the side away from the fixed end cover 3, the first sliding portion 5 on the support plate 4 is in sliding cooperation with the movable end cover 2, and the second sliding portion 6 is in sliding cooperation with the fixed end cover 3, so that the support plate 4 contracts radially;

[0045] The movable end cover 2 includes a truncated cone 7, and N guide grooves 8 are provided on the side of the truncated cone 7, and the guide grooves 8 are slidably matched with the first sliding part 5. Preferably, the truncated cone 7 is axially provided with a pull rod 9, and the pull rod 9 is fixedly connected to the telescopic device. The fixed end cover 3 is a truncated cone 2 10, and N guide grooves 2 11 are provided on the side of the truncated cone 2 10, and the guide grooves 2 11 are slidably matched with the second sliding part 6. Preferably, the truncated cone 2 10 is axially provided with a fixed rod 12, and the fixed rod 12 is fixedly connected to the fixing device, and the fixed rod 12 and the pull rod 9 are located in the same axial direction; one end of the fixed rod 12 is connected to the truncated cone 2 10, and one end of the pull rod 9 is connected to the truncated cone 7, and the other end of the pull rod 9 is sleeved on the outside of the fixed rod 12 away from the truncated cone 2 10; by sleeved on the outside of the fixed rod 12 away from the truncated cone 2 10 by the other end of the pull rod 9; by the movable end cover 2 being a truncated cone 7, and the guide grooves 8 are provided on the side of the truncated cone 7, the first sliding part 5 Sliding in the guide groove 1 8, thereby guiding one side of the support plate 4; by providing a guide groove 2 11 on the side of the frustum 10, the second sliding part 6 slides in the guide groove 2 11, thereby guiding the other side of the support plate 4, so that multiple support plates 4 are gathered or dispersed, thereby adjusting the diameter of the tension support device; when the support plate 4 contracts, the distance between the movable end cover 2 and the fixed end cover 3 increases, and the fixed rod 12 moves inside the pull rod 9, thereby preventing the movable end cover 2 and the fixed end cover 3 from deviating in the same axial direction;

[0046] The first sliding portion 5 includes a first limiting member 13 and a first supporting member 14. The first limiting member 13 slidably cooperates with the guide groove 8, and the first supporting member 14 is fixedly connected to the support plate 4 and the first limiting member 13, respectively. Preferably, the first limiting member 13 is a horizontal bar, and the first supporting member 14 is a vertical bar. The second sliding portion 6 includes a second limiting member 15 and a second supporting member 16. The second limiting member 15 slidably cooperates with the second sliding groove, and the second supporting member 16 is fixedly connected to the support plate 4 and the second limiting member 15, respectively. Preferably, the second limiting member 15 is a horizontal bar, and the second supporting member 16 is a vertical bar. Since the first sliding portion 5 includes the first limiting member 13 and the first supporting member 14, and the second sliding portion 6 includes the second limiting member 15 and the second supporting member 16, the first limiting member 13 slides in the guide groove 8, and the second limiting member 15 slides in the second sliding groove, providing guidance for the support plate 4, so that multiple support plates 4 are gathered or dispersed.

[0047] The fixed end cover 3 is fixedly connected to the fixing device, and the movable end cover 2 is connected to the fixing device through a telescopic device, and the movable end cover 2 and the fixed end cover 3 are arranged opposite to each other; the telescopic device includes a transmission mechanism 17 and a power mechanism 18; the transmission mechanism 17 is respectively connected to the pull rod 9 and the power mechanism 18; the transmission mechanism 17 includes one of a telescopic cylinder, a telescopic oil cylinder, and an elastic device; or the transmission mechanism 17 includes a screw 19, a nut 20 sleeved outside the screw 19 and a transmission shaft 21; the nut 20 is connected to the pull rod 9, the screw 19 is transmission-connected to the transmission shaft 21, and the transmission shaft 21 is connected to the power mechanism 18; the frustum 7 is connected to a frustum bracket 22, and the fixing device is provided with a slide groove 25, and the frustum bracket 22 is slidably connected to the slide groove 25; through the telescopic mechanism It includes a transmission mechanism 17 and a power mechanism 18, and the power mechanism 18 can be a manual power output or an electric power output; the transmission mechanism 17 is connected to the pull rod 9 and the power mechanism 18 respectively, and the power mechanism 18 drives the transmission mechanism 17 to achieve extension and retraction, thereby driving the pull rod 9 to move; when the transmission mechanism 17 includes a screw 19, a nut 20 sleeved outside the screw 19 and a transmission shaft 21, the power mechanism 18 drives the screw 19 to rotate, so that the nut 20 moves along the axial direction of the screw 19, thereby driving the round table 7 to move along the axial direction of the screw 19, and the round table bracket 22 is connected to the round table 7 through the round table 7, and the fixing device is provided with a slide groove 25. The round table bracket 22 is slidably connected to the slide groove 25, and the round table 7 is limited by the fixing device to prevent the round table 7 from rotating during the movement, thereby ensuring the stable movement of the movable end cover 2;

[0048] The fixing device includes a limiting mechanism and a support rod 23, and the length of the support rod 23 is not less than the radius of the lower bottom surface of the frustum 10; preferably, the limiting mechanism includes a support platform 24, and the slide groove 25 is provided on the support platform 24; more preferably, the fixing rod 12 is fixedly connected to the support rod 23; a support platform 24 is provided through the fixing device, and a slide groove 25 is provided on the support platform 24, so that the movable end cover 2 slides in the slide groove 25, ensuring the stable movement of the movable end cover 2; a support rod 23 is provided through the fixing device, and the length of the support rod 23 is not less than the radius of the lower bottom surface of the frustum 10, which can support the fixed end cover 3 so that the fiber covering on the tension support device will not fall to the ground;

[0049] It also includes an automatic control device, which includes a pressure sensor 26 and a PLC system 27. The pressure sensor 26 is in contact with the support plate 4. The pressure sensor 26 and the power mechanism 18 are electrically connected to the PLC system 27. The pressure parameters obtained by the pressure sensor 26 are processed by the PLC system 27 and converted into processing information to control the speed adjustment of the power mechanism 18 to achieve axial movement of the pull rod 9. By providing a pressure sensor 26, the pressure sensor 26 is in contact with the support plate 4, thereby detecting the tension of the fiber when it shrinks on the support plate 4. The PLC system 27 receives the pressure parameters transmitted by the pressure sensor 26 and the speed of the power mechanism, and then adjusts the distance between the movable end cover 2 and the fixed end cover 3, thereby reducing the diameter of the tension support device, so that each part of the fiber is under tension control that matches the shrinkage rate, thereby achieving crystallization and orientation requirements;

[0050] The movable end cover 2 is driven to move by the telescopic device, thereby adjusting the axial distance between the movable end cover 2 and the fixed end cover 3. The tension support device shrinks radially and uniformly as the axial distance between the movable end cover 2 and the fixed end cover 3 increases, thereby providing uniform and consistent tension for different shrinkage degrees of the fiber.

[0051] A method for dynamically adjusting the tension of a ceramic fiber heat-treated bundle includes the following steps: Step 1: Winding the ceramic fiber onto a support plate 4, winding one end of the ceramic fiber onto the support plate 4, and then winding the remaining part onto the support plate 4, and the fixed end of the ceramic fiber will not break as the support plate 4 shrinks; Step 2: Adjusting the temperature in the heat treatment furnace 1 to heat the ceramic fiber, detecting the induced pressure data transmitted by the pressure sensor 26, and transmitting the pressure induced data to the PLC system 27; Step 3: After the PLC system 27 receives the pressure induced data, the PLC system 27 compares the received induced pressure data with a preset pressure parameter. When the induced pressure data is greater than the preset pressure parameter, the PLC system 27 controls the telescopic device The position is retracted; Step 4: The telescopic device retracts. After receiving the retraction signal from the PLC system 27, the power mechanism 18 drives the transmission mechanism 17 to retract, and the transmission mechanism 17 drives the pull rod 9 to move away from the fixed end cover, so that the movable end cover 2 moves away from the fixed end cover 3, and the first limit member 13 slides along the guide groove 1 8, and the second limit member 15 slides along the guide groove 2 11. The first limit member 13 and the second limit member 15 drive the support plate 4 from the maximum diameter end of the frustum 1 7 and the frustum 2 10 to the minimum diameter end, thereby causing the support plate 4 to retract radially; Step 5: The PLC system 27 compares the received induced pressure data with the preset pressure parameters. When the induced pressure data is equal to the preset pressure parameters, the transmission mechanism 17 stops retracting. The pressure sensor 26 transmits the induced pressure data of the ceramic fiber at different temperatures to the PLC system 27. The PLC system 27 controls the contraction of the telescopic device according to the pressure induced data, thereby increasing the axial distance between the movable end cover 2 and the fixed end cover 3 and causing the support plate 4 to contract radially, so that the tension of various parts of the ceramic fiber at high temperature is evenly released, thereby achieving the purpose of adjusting the tension.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment, comprising a heat treatment furnace (1), a fixing device and a telescopic device, characterized in that: The invention also includes a tension regulating device, which includes a movable end cover (2), a fixed end cover (3), and a tension supporting device located between the movable end cover (2) and the fixed end cover (3), wherein the tension supporting device is slidably connected to the movable end cover (2) and the fixed end cover (3); The fixed end cover (3) is fixedly connected to the fixing device, the movable end cover (2) is connected to the fixing device via a telescopic device, and the movable end cover (2) and the fixed end cover (3) are arranged relative to each other.

2. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 1, characterized in that: The tension support device is composed of N support plates (4) with arcs, and the N support plates (4) form a cylinder; Preferably, the support plate (4) is provided with a first sliding portion (5) and a second sliding portion (6) at both ends close to the movable end cover (2) and the fixed end cover (3); the first sliding portion (5) is in sliding engagement with the movable end cover (2), and the second sliding portion (6) is in sliding engagement with the fixed end cover (3).

3. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 2, characterized in that: The movable end cover (2) includes a truncated cone (7), and N guide grooves (8) are provided on the side surface of the truncated cone (7). The guide grooves (8) are slidably matched with the first sliding part (5). Preferably, the truncated table (7) is provided with a pull rod (9) along the axial direction, and the pull rod (9) is fixedly connected to the telescopic device.

4. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 3, characterized in that: The fixed end cover (3) is a second truncated cone (10), and the side surface of the second truncated cone (10) is provided with N second guide grooves (11), and the second guide grooves (11) are slidably matched with the second sliding part (6). Preferably, the second truncated table (10) is provided with a fixing rod (12) along the axial direction, the fixing rod (12) is fixedly connected to the fixing device, and the fixing rod (12) and the pull rod (9) are located in the same axial direction; More preferably, one end of the fixed rod (12) is connected to the second truncated cone (10), one end of the pull rod (9) is connected to the first truncated cone (7), and the other end of the pull rod (9) is sleeved on the outside of the fixed rod (12) away from the second truncated cone (10).

5. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 4, characterized in that: The first sliding portion (5) includes a first limiting member (13) and a first supporting member (14), wherein the first limiting member (13) is slidably engaged with the guide groove (8), and the first supporting member (14) is fixedly connected to the supporting plate (4) and the first limiting member (13), respectively; Preferably, the first limiting member (13) is a horizontal bar, and the first supporting member (14) is a vertical bar.

6. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 5, characterized in that: The second sliding portion (6) includes a second limiting member (15) and a second supporting member (16), wherein the second limiting member (15) is slidably engaged with the second sliding groove, and the second supporting member (16) is fixedly connected to the supporting plate (4) and the second limiting member (15), respectively; Preferably, the second limiting member (15) is a horizontal bar, and the second supporting member (16) is a vertical bar.

7. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 6, characterized in that: The telescopic device includes a transmission mechanism (17) and a power mechanism (18); The transmission mechanism (17) is connected to the pull rod (9) and the power mechanism (18) respectively; The transmission mechanism (17) comprises one of a telescopic air cylinder, a telescopic oil cylinder, and an elastic device; or The transmission mechanism (17) includes a screw (19), a nut (20) sleeved on the screw (19) and a transmission shaft (21); the nut (20) is connected to the pull rod (9), the screw (19) is transmission-connected to the transmission shaft (21), and the transmission shaft (21) is connected to the power mechanism (18); the frustum (7) is connected to a frustum bracket (22), the fixing device is provided with a slide groove (25), and the frustum bracket (22) is slidingly connected to the slide groove (25).

8. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 7, characterized in that: The fixing device includes a limiting mechanism and a support rod (23), and the length of the support rod (23) is not less than the radius of the bottom surface of the second frustum (10); Preferably, the limiting mechanism includes a support platform (24), and the slide groove (25) is arranged on the support platform (24); More preferably, the fixing rod (12) is fixedly connected to the supporting rod (23).

9. The device for dynamically adjusting the tension of a ceramic fiber bundle during heat treatment according to claim 8, characterized in that: It also includes an automatic control device, the automatic control device includes a pressure sensor (26) and a PLC system (27), the pressure sensor (26) is in contact with the support plate (4); The pressure sensor (26), the power mechanism (18) and the PLC system (27) are electrically connected; the pressure parameters obtained by the pressure sensor (26) are processed and converted into processing information by the PLC system (27), and the speed adjustment of the power mechanism (18) is controlled to realize the axial movement of the pull rod (9).

10. A method for dynamically adjusting the tension of ceramic fiber bundles during heat treatment, characterized in that: The invention comprises the following steps: step 1: winding the ceramic fiber onto the support plate (4); step 2: adjusting the temperature in the heat treatment furnace (1) to heat the ceramic fiber, detecting the induced pressure data transmitted by the pressure sensor (26), and transmitting the pressure induced data to the PLC system (27); step 3: after the PLC system (27) receives the pressure induced data, the PLC system (27) compares the received induced pressure data with the preset pressure parameter, and when the induced pressure data is greater than the preset pressure parameter, the PLC system (27) controls the telescopic device to contract; step 4: after the telescopic device contracts and receives the contraction signal from the PLC system (27), the power mechanism (18) drives the transmission mechanism (17) to contract. The transmission mechanism (17) drives the pull rod (9) to move away from the fixed end cover, thereby the movable end cover (2) moves away from the fixed end cover (3), the first limit member (13) slides along the guide groove (8), and the second limit member (15) slides along the guide groove (11). The first limit member (13) and the second limit member (15) drive the support plate (4) to move from the largest diameter end of the cone (7) and the cone (10) to the smallest diameter end, thereby causing the support plate (4) to contract radially; Step 5: The PLC system (27) compares the received induced pressure data with the preset pressure parameters. When the induced pressure data is equal to the preset pressure parameters, the transmission mechanism (17) stops contracting.

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