A ceramic fiber tube differential pressure testing mechanism

Abstract

This invention discloses a differential pressure testing mechanism for ceramic fiber tubes, belonging to the technical field of testing mechanisms. It includes a main body with an operating plate at its top and a lifting mechanism at its bottom. The lifting mechanism includes a connecting rod, a rotating shaft, a fixed base, a lifting plate, and a moving column. The connecting rod is located at the top of the fixed base, the rotating shaft is located inside the connecting rod, the fixed base is located at the top of the operating plate, and the lifting plate is located at the top of the connecting rod. This invention connects the main body to an external power supply. The ceramic fiber tube is manually inserted through the conical guide rail inlet. The silicone roller inside the housing achieves automatic centering and positioning. After the ceramic fiber tube touches the top plate, it drives the rotating ring to rotate. The locking block drives the sealing block to seal the gap between the ceramic fiber tube and the duct, ensuring that the air pressure reaches the inside of the tube directly. The double-threaded design of the rotating rod enables the time-sharing movement of the moving column and the telescopic sleeve. The overall structure is simple to operate and provides reliable sealing.

Description

Technical Field

[0001] This invention relates to the field of testing mechanism technology, specifically to a ceramic fiber tube differential pressure testing mechanism. Background Technology

[0002] The background technology of differential pressure testing mechanisms for ceramic fiber tubes stems from the need for performance testing of heat-resistant pipelines in high-temperature industrial equipment. Ceramic fiber tubes, due to their excellent high-temperature resistance and low thermal conductivity, are widely used in flue gas treatment systems in metallurgy, chemical industry, and other fields. Their structural integrity directly affects the operational safety of the equipment. Early differential pressure testing mainly relied on mechanical pressure gauges connected to temporary pipelines, which suffered from low measurement accuracy and poor high-temperature adaptability. With the development of sensor technology, the application of differential pressure transmitters has significantly improved testing accuracy. However, the porous nature of the ceramic fiber tube surface makes traditional sealing methods prone to leakage. Modern testing mechanisms utilize high-temperature silicone sealing rings. Combined with adaptive fixtures, the system ensures airtightness while avoiding mechanical damage to the brittle tube. The testing system integrates a temperature compensation module to eliminate interference from environmental heat radiation on the pressure signal. Some advanced systems also introduce micro-flow control technology to achieve dynamic detection under different working conditions by adjusting the test gas flow rate. In terms of data acquisition, the system has evolved from early analog signal recorders to digital processing systems, which can analyze pressure decay curves in real time and automatically determine the tube permeability. The evolution of this technology has always revolved around the three core requirements of accurate measurement, non-destructive testing, and automated evaluation under high-temperature environments, providing a reliable means for the quality control of ceramic fiber tubes.

[0003] Existing ceramic fiber tube differential pressure testing mechanisms often have the following drawbacks: The positioning methods of existing ceramic fiber tube differential pressure testing mechanisms are inefficient and highly dependent on manual operation experience. Traditional solutions require manual adjustment of the alignment position of the positioning shaft and the roller platform, a cumbersome and time-consuming process. Improper operation can easily lead to deviation of the central axis, resulting in poor sealing or tube collisions. Regarding the sealing structure, the flange connection method using bolts and rubber gaskets is prone to leakage after long-term use due to gasket aging, affecting testing accuracy. Furthermore, the rigid positioning shaft directly contacts the surface of the ceramic tube; due to insufficient material compatibility, the tube surface is easily scratched or even broken during assembly and testing, increasing the risk of loss during testing. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a differential pressure testing mechanism for ceramic fiber tubes, to solve the problems of low positioning efficiency, reliance on manual alignment, and easy occurrence of poor sealing or tube damage in existing differential pressure testing mechanisms. Furthermore, aging flange gaskets are prone to leakage, and direct contact with the rigid positioning shaft can easily scratch the brittle ceramic tube, affecting the technical problems of testing accuracy and reliability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ceramic fiber tube differential pressure testing mechanism, comprising a main body, an operating plate at the top of the main body, and a lifting mechanism at the bottom of the operating plate. The lifting mechanism includes a connecting rod, a rotating shaft, a fixed base, a lifting plate, and a moving column. The connecting rod is located at the top of the fixed base, the rotating shaft is located inside the connecting rod, the fixed base is located at the top of the operating plate, the lifting plate is located at the top of the connecting rod, the moving column is located at the top of the fixed base, a linear guide rail is located at the top of the lifting plate, and a mounting bracket is located at the top of the linear guide rail. The enclosure includes a motor mounted on the top of the control panel, with a rotating rod connected to the motor's output. One end of the rotating rod has a telescopic sleeve, and the other end of the telescopic sleeve has a clamping mechanism. The clamping mechanism includes a first gear, a second gear, and a clamping block. The first gear and the second gear are both located at one end of a mounting plate, and the clamping block is positioned on the top of the second gear. The mounting plate is located inside the control panel, and one end of the mounting plate is movably connected to an arc-shaped plate. The top of the control panel has a mounting plate that mates with the motor. A control panel is located on the outer side of the main body.

[0006] By adopting the above technical solution, the operator connects the main body to the external power supply equipment to ensure the internal power supply of the main body. Then, the operator manually inserts the ceramic fiber tube that needs to be connected for differential pressure testing into the tapered guide rail inlet at the top of the main body. When one end of the ceramic fiber tube touches the placement shell, the multiple sets of silicone rollers inside the placement shell help to automatically center and position the ceramic fiber tube. After the operator inserts the tube, one end of the ceramic fiber tube touches the top plate at one end of the placement shell. At this time, the linear guide rail controls the placement shell to move backward, thereby exposing the operating space of the sealing mechanism and the clamping mechanism. At this time, the motor inside the main body starts to operate, and the rotating rod at its output end rotates forward. The forward rotation of the rotating rod causes the moving column on its outer side to move. The internal thread of the moving column and the external thread of the rotating rod cooperate to control the movement of the moving column.

[0007] Furthermore, a top rod is provided at the bottom end of the lifting plate, the clamping block is connected to the second gear through a connecting rod, a roller is provided between the setting plate and the arc plate, a rubber layer is provided on one side of the clamping block, the sealing block is fixed to one end of the locking block by screws, and the rotating ring is connected to the sealing block through a connecting rod.

[0008] By adopting the above technical solution, the two sets of connecting rods can slowly lower the lifting plate and the ceramic fiber tube above it, which is connected to the outside world, around the pivot. When the lifting plate lowers, it will drive the push rod at its bottom to lower synchronously. The movement of the push rod will squeeze the corresponding toothed plate, causing the toothed plate to move downward. As the toothed plate moves downward, the spring at one end can maintain elastic potential energy while it is falling, which facilitates the reset when the lifting plate is raised later.

[0009] Furthermore, a sensor assembly plate is provided at the top of the operation panel, multiple sets of silicone rollers are provided inside the placement shell, an air duct is provided on one side of the main body, a threaded hole that mates with the rotating rod is provided inside the moving column, and a limiting frame that mates with the connecting rod is provided at the bottom of the lifting plate.

[0010] By adopting the above technical solution, when the toothed plate moves downward, it will drive the first gear that meshes with its teeth to rotate. When the first gear rotates, it will drive the second gear, and through the connecting rod, the two sets of clamping blocks will move closer to each other, thus clamping the ceramic fiber tube that is being slowly moved downward by the lifting mechanism. When the ceramic fiber tube is clamped, the motor is still rotating in the forward direction, so the rotating rod is still rotating. Through the rotation of the rotating rod, the telescopic sleeve set at one end of the rotating rod can move forward synchronously under the transmission of the rotating rod. This allows the clamping mechanism to move the ceramic fiber tube forward, which plays a role in dispersing contact stress and avoiding rigid clamping from scratching the ceramic surface.

[0011] Furthermore, the operating plate is provided with a toothed plate inside, and the toothed plate corresponds to the top rod. A spring is provided at one end of the toothed plate, and a tapered guide rail that cooperates with the sealing mechanism is provided at the top of the operating plate. A cavity that cooperates with the toothed plate is opened inside the operating plate, and a fixing rod that cooperates with the spring is provided inside the operating plate.

[0012] By adopting the above technical solution, when the clamping mechanism moves, the plate at one end will be pressed against the arc-shaped plate by the rollers on its outer side, and move along the spiral groove of the arc-shaped plate. This causes the arc-shaped plate to drive the rotating ring to rotate. When the rotating ring rotates, it will cause multiple sets of locking blocks to rotate around the connection point of the fixed plate as the axis through the connecting rod. This causes the multiple sets of locking blocks to drive the sealing block at one end to seal the gap between the forward-moving ceramic fiber tube and the air duct. This allows the air pressure of the high-speed fan inside the main body to directly reach the inside of the ceramic fiber tube through the air duct without being affected by the outside. This achieves the effect of applying uniform radial pressure through mechanical linkage and the sealing pressure adapting to the pipe diameter.

[0013] In summary, the present invention has the following advantages: By connecting the main body to an external power supply, the ceramic fiber tube is manually inserted into the tapered guide rail inlet. The silicone roller inside the housing achieves automatic centering and positioning. After the ceramic fiber tube touches the top plate, the linear guide rail drives the housing to move backward, exposing the sealing mechanism and clamping mechanism. The motor drives the rotating rod to rotate, which in turn moves the moving column, causing the connecting rod to slowly descend around the rotating shaft to lift the lifting plate and the housing. The pressure plate of the top rod drives the first gear to rotate, and the second gear drives the clamping block to clamp the ceramic fiber tube. The telescopic sleeve pushes the clamping mechanism forward to disperse the contact stress. The setting plate roller moves along the arc plate groove, driving the rotating ring to rotate. The locking block drives the sealing block to seal the gap between the ceramic fiber tube and the air duct, ensuring that the air pressure reaches the inside of the pipe directly. The double-thread design of the rotating rod enables the moving column and the telescopic sleeve to move in a time-sharing manner. The overall structure is easy to operate and has reliable sealing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first perspective;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0016] Figure 3 For the present invention Figure 2 Enlarged view of point A;

[0017] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 5 For the present invention Figure 4 Enlarged view of point B;

[0019] Figure 6 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 7 For the present invention Figure 6 Enlarged view of point C;

[0021] Figure 8 This is a partial structural diagram of the present invention;

[0022] Figure 9 For the present invention Figure 8 Enlarged view of point D;

[0023] Figure 10 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 11 This is a schematic diagram of the sealing mechanism of the present invention.

[0025] In the diagram: 1. Main body; 2. Control panel; 3. Dustproof shell; 4. Air duct; 5. Sensor assembly plate; 6. Conical guide rail; 7. Lifting mechanism; 701. Connecting rod; 702. Rotating shaft; 703. Fixed base; 704. Lifting plate; 705. Moving column; 8. Clamping mechanism; 801. First gear; 802. Second gear; 803. Clamping block; 804. Setting plate; 9. Sealing mechanism; 901. Sealing block; 902. Fixed ring; 903. Rotating ring; 904. Fixed plate; 905. Engaging block; 10. Motor; 11. Rotating rod; 12. Linear guide rail; 13. Operation panel; 14. Placement shell; 15. Telescopic sleeve; 16. Top rod; 17. Toothed plate; 18. Fixed rod; 19. Spring; 20. Arc plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of the present invention will now be described.

[0028] A ceramic fiber tube differential pressure testing mechanism, such as Figures 1-11As shown, the device includes a main body 1, with an operation plate 13 at its top. A dustproof shell 3 is mounted on the top of the operation plate 13. A lifting mechanism 7 is located at the bottom of the operation plate 13. The lifting mechanism 7 includes a connecting rod 701, a rotating shaft 702, a fixed base 703, a lifting plate 704, and a moving column 705. The connecting rod 701 is located at the top of the fixed base 703, the rotating shaft 702 is located inside the connecting rod 701, the fixed base 703 is located at the top of the operation plate 13, the lifting plate 704 is located at the top of the connecting rod 701, and the moving column 705 is located at the top of the fixed base 703. A dustproof shell 3 is mounted on the top of the lifting plate 704. Linear guide rail 12, with a housing 14 at its top; operation plate 13 with a motor 10 at its top; motor 10 outputting a rotating rod 11; a telescopic sleeve 15 at one end of the rotating rod 11; and a clamping mechanism 8 at one end of the telescopic sleeve 15. The clamping mechanism 8 includes a first gear 801, a second gear 802, and a clamping block 803. The first gear 801 is located at one end of a setting plate 804, the second gear 802 is located at one end of the setting plate 804, and the clamping block 803 is located at the top of the second gear 802. The setting plate 804 is located inside the operation plate 13. 4. An arc-shaped plate 20 is movably connected to one end of the main body 1. The top of the operating panel 13 is equipped with a mounting plate that cooperates with the motor 10. A control panel 2 is set on the outside of the main body 1. The operator connects the main body 1 to an external power supply to ensure the internal power supply of the main body 1. Then, the operator manually inserts the ceramic fiber tube that needs to be connected for differential pressure testing into the inlet of the tapered guide rail 6 at the top of the main body 1. When one end of the ceramic fiber tube touches the placement shell 14, the multiple sets of silicone rollers set inside the placement shell 14 cooperate with the placement of the ceramic fiber tube, which plays a role in automatic centering and positioning. After the staff inserts the ceramic fiber tube, one end touches the top plate set at one end of the placement shell 14. At this time, the linear guide rail 12 controls the placement shell 14 to move backward, thereby exposing the operating space of the sealing mechanism 9 and the clamping mechanism 8. At this time, the motor 10 inside the main body 1 starts to operate, and the rotating rod 11 set at its output end rotates in the forward direction. The forward rotation of the rotating rod 11 causes the moving column 705 set on its outer side to move. The internal thread set inside the moving column 705 cooperates with the external thread of the rotating rod 11 to control the movement of the moving column 705.

[0029] For example, a sealing mechanism 9 is provided at one end of the arc-shaped plate 20. The sealing mechanism 9 includes a sealing block 901, a fixing ring 902, a rotating ring 903, and a fixing plate 904. The sealing block 901 is located at one end of the fixing ring 902, the fixing ring 902 is located at the top of the fixing plate 904, the rotating ring 903 is located at one end of the arc-shaped plate 20, and the fixing plate 904 is located at the top of the operating plate 13. A top rod 16 is provided at the bottom end of the lifting plate 704. The clamping block 803 is connected to the second gear 802 by a connecting rod, wherein the two sets of connecting rods are connected. 701 can slowly lower the lifting plate 704 and the placement shell 14 above it, along with the external ceramic fiber tube, around the pivot 702. When the lifting plate 704 lowers, it will drive the top rod 16 at its bottom to lower synchronously. The movement of the top rod 16 will squeeze the corresponding toothed plate 17, causing the toothed plate 17 to move downward. As the toothed plate 17 moves downward, the spring 19 at one end can maintain elastic potential energy while it is falling, which will facilitate the subsequent resetting of the lifting plate 704 when it is raised.

[0030] For example, rollers are provided between the setting plate 804 and the arc plate 20, a rubber layer is provided on one side of the clamping block 803, the sealing block 901 is fixed to one end of the locking block 905 by screws, the rotating ring 903 and the sealing block 901 are connected by a connecting rod, a sensor collection plate 5 is provided at the top of the operating plate 13, multiple sets of silicone rollers are provided inside the placement shell 14, and an air duct 4 is provided on one side of the main body 1. When the toothed plate 17 moves down, it will drive the first gear 801, which meshes with its teeth, to rotate. When the first gear 801 rotates, it will drive the second gear 802. The connecting rod will bring the two sets of clamping blocks 803 closer together, so as to clamp the top. The lifting mechanism 7 carries the slowly descending ceramic fiber tube. When the ceramic fiber tube is clamped, the motor 10 continues to rotate in the forward direction, so the rotating rod 11 continues to rotate. Through the rotation of the rotating rod 11, the telescopic sleeve 15 set at one end of the rotating rod 11 can move forward synchronously under the transmission of the rotating rod 11. Thus, the clamping mechanism 8 carries the ceramic fiber tube forward, which plays a role in dispersing contact stress and avoiding rigid clamping from scratching the ceramic surface. The dustproof shell 3 plays a role in protecting the sealing structure 9 and the clamping structure 8, preventing external dust from entering. Secondly, the fixed rod 18 plays a role in limiting the position of the spring 19 and preventing displacement during movement.

[0031] For example, the movable column 705 has a threaded hole that mates with the rotating rod 11, the bottom end of the lifting plate 704 has a limiting frame that mates with the connecting rod 701, the bottom end of the telescopic sleeve 15 has a sliding limiting plate, the arc plate 20 has a groove that mates with the setting plate 804, the operating plate 13 has a toothed plate 17 that corresponds to the top rod 16, one end of the toothed plate 17 has a spring 19, and the top end of the operating plate 13 has a tapered guide rail 6 that mates with the sealing mechanism 9. When the clamping mechanism 8 moves, the setting plate 804 at one end will press the arc plate 20 due to the rollers on its outer side, and move along the arc. The spiral groove of plate 20 moves, causing the arc plate 20 to drive the rotating ring 903 to rotate. When the rotating ring 903 rotates, it will cause multiple sets of locking blocks 905 to rotate around the connection point of the fixed plate 904 via a connecting rod. This causes the multiple sets of locking blocks 905 to drive the sealing block 901 set at one end to seal the gap between the forward-moving ceramic fiber tube and the air duct 4. This allows the high-speed fan inside the main body 1 to deliver air pressure directly to the inside of the ceramic fiber tube through the air duct 4 without being affected by the outside environment. This achieves the effect of applying uniform radial pressure through mechanical linkage and adaptive sealing pressure with pipe diameter.

[0032] The working principle of this invention is as follows: When in use, the operator connects the main body 1 to the external power supply equipment to ensure the internal power supply of the main body 1. Then, the operator manually inserts the external ceramic fiber tube that needs to be tested for differential pressure into the tapered guide rail 6 at the top of the main body 1. When one end of the ceramic fiber tube touches the placement shell 14, the multiple sets of silicone rollers set inside the placement shell 14 will cooperate with the placement of the ceramic fiber tube to achieve automatic centering and positioning.

[0033] After the staff inserts the ceramic fiber tube, one end touches the top plate set at one end of the placement shell 14. At this time, the linear guide rail 12 controls the placement shell 14 to move backward, thereby exposing the operating space of the sealing mechanism 9 and the clamping mechanism 8. At this time, the motor 10 inside the main body 1 starts to operate, and the rotating rod 11 set at its output end rotates in the forward direction. The forward rotation of the rotating rod 11 causes the moving column 705 set on its outer side to move. The internal thread set inside the moving column 705 cooperates with the external thread of the rotating rod 11 to control the movement of the moving column 705.

[0034] This allows the two sets of connecting rods 701 to slowly lower the lifting plate 704 and the placement shell 14 above it, along with the external ceramic fiber tube, around the pivot 702. When the lifting plate 704 lowers, it will drive the top rod 16 at its bottom to lower synchronously. The movement of the top rod 16 will press the corresponding toothed plate 17, causing the toothed plate 17 to move downward. As the toothed plate 17 moves downward, the spring 19 at one end can maintain its elastic potential energy while it is falling, which will facilitate the subsequent resetting of the lifting plate 704 when it is raised.

[0035] When the toothed plate 17 moves downward, it drives the first gear 801, which meshes with its teeth, to rotate. When the first gear 801 rotates, it drives the second gear 802. Through the connecting rod, the two sets of clamping blocks 803 are brought closer to each other, thus clamping the ceramic fiber tube that is slowly moving downward with the lifting mechanism 7. When the ceramic fiber tube is clamped, the motor 10 is still rotating in the forward direction, so the rotating rod 11 is still rotating. Through the rotation of the rotating rod 11, the telescopic sleeve 15 set at one end of the rotating rod 11 can move forward synchronously under the transmission of the rotating rod 11. Thus, the clamping mechanism 8 moves the ceramic fiber tube forward, which plays a role in dispersing contact stress and avoiding rigid clamping from scratching the ceramic surface.

[0036] While the clamping mechanism 8 is moving, the setting plate 804 at one end will press the arc plate 20 due to the rollers set on its outer side, and move along the spiral groove of the arc plate 20. This causes the arc plate 20 to drive the rotating ring 903 to rotate. When the rotating ring 903 rotates, it will cause multiple sets of locking blocks 905 to rotate around the connection point of the fixed plate 904 through the connecting rod. This will cause multiple sets of locking blocks 905 to drive the sealing block 901 set at one end to seal the gap between the forward-moving ceramic fiber tube and the air duct 4. This will allow the high-speed fan set inside the main body 1 to deliver air pressure directly to the inside of the ceramic fiber tube through the air duct 4 without being affected by the outside. This will achieve the effect of applying uniform radial pressure through mechanical linkage and adaptive sealing pressure with pipe diameter.

[0037] Specifically, the outer side of the rotating rod 11 is provided with two sets of threads, one set of which is engaged with the moving column 705 and the other set of which is engaged with the telescopic sleeve 15. The transmission ratios of the two sets of threads are not equal. The thread engaged with the moving column 705 is also provided with a bearing at one end. When the moving column 705 moves to a certain position, it will not move forward. The thread engaged with the telescopic sleeve 15 is also provided with a certain buffer zone between the front end of the thread and the rotating rod 11, so as to ensure that the telescopic sleeve 15 will not move forward when the moving column 705 moves at the beginning. The dust cover 3 serves as a protective sealing structure 9 and a clamping structure 8 to prevent external dust from entering. Secondly, the fixed rod 18 restricts the position of the spring 19 to prevent displacement during the movement.

[0038] The above structure achieves a high positioning efficiency, does not require extensive reliance on manual operation experience, and is simple to operate. In terms of sealing structure, rubber sealing blocks 901 are used for combined sealing to ensure test accuracy.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A ceramic fiber tube differential pressure testing mechanism, characterized in that: The system includes a main body (1), an operating plate (13) at the top of the main body (1), a dustproof shell (3) at the top of the operating plate (13), and a lifting mechanism (7) at the bottom of the operating plate (13). The lifting mechanism (7) includes a connecting rod (701), a rotating shaft (702), a fixed seat (703), a lifting plate (704), and a moving column (705). The connecting rod (701) is located at the top of the fixed seat (703), and the rotating shaft (702) is located at the bottom of the fixed seat (703). Inside the connecting rod (701), the fixed seat (703) is located at the top of the operating plate (13), the lifting plate (704) is located at the top of the connecting rod (701), the moving column (705) is located at the top of the fixed seat (703), the top of the lifting plate (704) is provided with a linear guide rail (12), the top of the linear guide rail (12) is provided with a housing (14), the top of the operating plate (13) is provided with a motor (10), and the output of the motor (10) is sleeved with... A rotating rod (11) is provided with a telescopic sleeve (15) at one end, and a clamping mechanism (8) is provided at one end of the telescopic sleeve (15). The clamping mechanism (8) includes a first gear (801), a second gear (802), and a clamping block (803). The first gear (801) is provided at one end of the setting plate (804), the second gear (802) is provided at one end of the setting plate (804), and the clamping block (803) is provided at the top of the second gear (802). The setting plate (804) is provided inside the operating plate (13). An arc plate (20) is movably connected to one end of the setting plate (804). An installation plate that cooperates with the motor (10) is provided at the top of the operating plate (13). A control panel (2) is provided on the outside of the main body (1). A sensor collection plate (5) is provided at the top of the operating plate (13). Multiple sets of silicone rollers are provided inside the placement shell (14). An air duct (4) is provided on one side of the main body (1).

2. A ceramic fiber tube differential pressure testing mechanism according to claim 1, characterized in that: A sealing mechanism (9) is provided at one end of the arc plate (20). The sealing mechanism (9) includes a sealing block (901), a fixing ring (902), a rotating ring (903), and a fixing plate (904). The sealing block (901) is located at one end of the fixing ring (902), the fixing ring (902) is located at the top of the fixing plate (904), the rotating ring (903) is located at one end of the arc plate (20), and the fixing plate (904) is located at the top of the operating plate (13).

3. A ceramic fiber tube differential pressure testing mechanism according to claim 1, characterized in that: The bottom end of the lifting plate (704) is provided with a top rod (16), and the clamping block (803) is connected to the second gear (802) by a connecting rod.

4. A ceramic fiber tube differential pressure testing mechanism according to claim 1, characterized in that: A roller is provided between the setting plate (804) and the arc plate (20), and a rubber layer is provided on one side of the clamping block (803).

5. A ceramic fiber tube differential pressure testing mechanism according to claim 2, characterized in that: The sealing block (901) is fixed to one end of the locking block (905) by screws, and the rotating ring (903) is connected to the sealing block (901) by a connecting rod.

6. A ceramic fiber tube differential pressure testing mechanism according to claim 1, characterized in that: The movable column (705) has a threaded hole that mates with the rotating rod (11) inside, and the bottom end of the lifting plate (704) is provided with a limiting frame that mates with the connecting rod (701).

7. A ceramic fiber tube differential pressure testing mechanism according to claim 1, characterized in that: The telescopic sleeve (15) is provided with a sliding limit plate at its bottom end, and the arc plate (20) has a groove inside that cooperates with the setting plate (804).

8. A ceramic fiber tube differential pressure testing mechanism according to claim 3, characterized in that: The operating plate (13) is provided with a toothed plate (17) inside, and the toothed plate (17) corresponds to the top rod (16). A spring (19) is provided at one end of the toothed plate (17), and a tapered guide rail (6) that cooperates with the sealing mechanism (9) is provided at the top of the operating plate (13).

9. A ceramic fiber tube differential pressure testing mechanism according to claim 8, characterized in that: The operating plate (13) has a cavity inside that cooperates with the toothed plate (17), and the operating plate (13) has a fixing rod (18) inside that cooperates with the spring (19).

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