A device for recording the working characteristics of an air preheater bimetallic driven self-compensating seal

Abstract

The present invention discloses a device for recording the working characteristics of a bimetallic driven self-compensating seal for an air preheater, which relates to the technical field of air preheaters and includes an air preheater partition plate, one side of which is bolted with a high-temperature resistant support plate and a bimetallic driven self-compensating seal mechanism, an installation mechanism provided on the inner side of the bimetallic driven self-compensating seal mechanism, a installation plate provided on the bottom of the installation mechanism, a compensation recording plate fixedly connected to the bottom of the installation plate, an insert block fixedly connected to the top of the installation plate, and a limiting hole provided on one side of the insert block. This device for recording the working characteristics of a bimetallic driven self-compensating seal for an air preheater solves the problem in existing technology that the drive compensation trajectory of the bimetallic driven self-compensating seal cannot be effectively recorded by providing a drive mechanism and a compensation recording plate, thereby improving the working reliability and gap compensation accuracy of the bimetallic driven self-compensating seal and providing a basis for later inspection and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of air preheaters, in particular to a device for recording working characteristics of an air preheater bimetallic driven self-compensating seal. Background Art

[0002] The rotary air preheater is a heat exchange device used in large coal-fired power plant boilers. It uses the heat of the boiler flue gas to heat the air required for combustion, thereby improving the efficiency of the boiler.

[0003] When the air preheater rotor goes from cold to hot, it deforms in a "mushroom-like" pattern due to the temperature differences between the upper and lower surfaces and the weakening of the steel's rigidity after heating. Traditional rigid sealing plates are bolted to the rotor diaphragm in sections. As the rotor diaphragm deforms, they sink and deform, and the gap changes accordingly, leading to increased air leakage. Due to the mechanism of the rotor's "mushroom-like" deformation, although the radial clearance at the hot end is very small in the cold state, a large triangular air leakage area forms when the rotor is hot. According to statistics and calculations, air leakage here generally accounts for more than 50% of direct air leakage, which can seriously affect boiler efficiency and increase fan operating power consumption.

[0004] In the prior art, for example, China Publication No. CN115789258A discloses an elastic thermally driven compensating sealing device and its mounting structure for use at the hot end of an air preheater. The specification states that the present invention discloses an elastic thermally driven compensating sealing device and its mounting structure for use at the hot end of an air preheater. The sealing device comprises a thermal expansion driving plate, a cantilever thermal bending plate, a shrinkage reinforcement rib, a gap compensation device and a fixed-distance locking sleeve, and is cantilevered and mounted on the hot end rotor partition of the air preheater.

[0005] However, the existing device has the following shortcomings during use:

[0006] In the existing technology, compared with other sealing technologies, it has the advantages of low cost, easy installation, and can significantly reduce the air leakage rate of the air preheater. Once it collides with the fan plate at the hot end of the air preheater, it can elastically retreat. It has the comprehensive advantages of strong adaptability, high reliability, and long service life. However, when the air preheater is running, it is difficult to monitor the movement trajectory of the sealing plate relative to the drive plate or the radial partition due to the closed structure. When the air preheater is shut down, the sealing plate will cool and reset, and the drive compensation trajectory of the bimetallic driven self-compensating seal cannot be effectively recorded, which reduces the working reliability and gap compensation accuracy of the bimetallic driven self-compensating seal, and is not convenient for providing a basis for subsequent inspection and maintenance.

[0007] Therefore, we propose an air preheater bimetallic driven self-compensating seal working characteristic recording device to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a bimetallic driven self-compensating seal working characteristic recording device for an air preheater. By setting a driving mechanism and rotating the first rotating cap, the worm, worm wheel, rotating rod, gear, rack and fixed plate cooperate to drive the marking needle to move to the surface of the compensation recording plate. When the air preheater is running, in the hot stage, the bimetallic driven self-compensating seal mechanism is deformed to cause relative displacement with the marking needle, and the displacement trajectory can be recorded by the marking needle on the surface of the compensation recording plate to solve the problems raised by the above-mentioned background technology.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater, comprising an air preheater partition plate, a high-temperature resistant support plate and a bimetallic driven self-compensating sealing mechanism being bolted to one side of the air preheater partition plate, a mounting mechanism being provided on the inner side of the bimetallic driven self-compensating sealing mechanism, a mounting plate being provided at the bottom of the mounting mechanism, a compensation amount recording plate being fixedly connected to the bottom of the mounting plate, an inserting block being fixedly connected to the top of the mounting plate, a limiting hole being provided on one side of the inserting block, an adjustment mechanism being provided on one side of the high-temperature resistant support plate, a driving mechanism being provided on the adjustment mechanism, a scratching needle being provided at one end of the driving mechanism, the driving mechanism comprising a fixed shell, a worm being rotatably connected to the fixed shell, a rotating rod being rotatably connected to the fixed shell, a worm wheel and a gear being fixedly sleeved on the outer surface of the rotating rod, the worm being meshed with the worm wheel, a rack being provided in the fixed shell, one side of the rack movably passing through the fixed shell and fixedly connected to the fixed plate, the rack being meshed with the gear.

[0010] Preferably, a fixing cylinder is fixedly connected to one side of the fixing plate, a return spring is fixedly connected in the fixing cylinder, a sliding plate is slidably connected in the fixing cylinder, and one end of the sliding plate is fixedly connected to a movable rod.

[0011] Preferably, one end of the movable rod movably passes through the fixed tube, and the marking needle is installed on one end of the movable rod.

[0012] Preferably, a limiting groove is provided on the inner side of the fixed shell, and a limiting block is slidably connected in the limiting groove.

[0013] Preferably, the bottom of the limit block is fixedly connected to the rack, and the smooth end of the worm movably passes through the fixed shell and is fixedly mounted with a first rotating cap.

[0014] Preferably, the adjustment mechanism includes a groove, which is opened on one side of the high-temperature resistant support plate. A one-way threaded rod is threadedly connected to the top of the inner side of the groove. A second rotating cap is fixedly installed on the top of the one-way threaded rod, and the bottom end of the one-way threaded rod is rotatably connected to the fixed shell.

[0015] Preferably, a linear guide rail is fixedly installed on the inner side of the groove, a guide rail slider is slidably connected to the linear guide rail, and the fixed shell is fixedly connected to one side of the guide rail slider.

[0016] Preferably, the mounting mechanism includes a mounting block with an empty slot provided inside the mounting block, a bidirectional threaded rod rotatably connected in the empty slot, a smooth end of the bidirectional threaded rod movably passing through the empty slot and the mounting block and fixedly mounted with a third rotating cap.

[0017] Preferably, a slot is provided at the bottom of the mounting block, a fixing rod is fixedly connected in the slot, and a movable plate is sleeved on the outer surface of the fixing rod and the bidirectional threaded rod.

[0018] Preferably, one side of the movable plate is fixedly connected to a limiting rod, and one end of the limiting rod movably passes through the empty slot and the slot and extends into the limiting hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention sets a driving mechanism to rotate the first rotating cap, and with the joint cooperation of the worm, worm wheel, rotating rod, gear, rack and fixed plate, drives the marking needle to move to the surface of the compensation recording plate. When the air preheater is running, in the hot stage, the deformation of the bimetallic driven self-compensating seal mechanism causes relative displacement with the marking needle, and the displacement trajectory can be engraved by the marking needle on the surface of the compensation recording plate, which solves the problem in the existing technology that the driving compensation trajectory of the bimetallic driven self-compensating seal cannot be effectively recorded, improves the working reliability and gap compensation accuracy of the bimetallic driven self-compensating seal, and provides a basis for later inspection and maintenance.

[0021] 2. The present invention provides an installation mechanism, inserts the insert block on the compensation recording plate into the slot, and rotates the third rotating cap so that the two movable plates drive the two limit rods to move relative to each other and squeeze into the two limit holes, thereby limiting and fixing the compensation recording plate, thereby facilitating the installation of the compensation recording plate. When disassembling, the third rotating cap is reversed to release the restriction on the compensation recording plate, and the plate can be removed, which is convenient to operate.

[0022] 3. The present invention sets an adjustment mechanism and rotates the second rotating cap. With the cooperation of the one-way threaded rod, the fixed shell, the linear guide rail and the guide rail slider, the marking needle can be driven to move upward, so as to facilitate moving the marking needle to a position above the center of the compensation recording plate, thereby facilitating the recording of the driving compensation trajectory of the bimetallic driven self-compensating seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of the main structure of an air preheater bimetallic driven self-compensating seal working characteristic recording device of the present invention;

[0024] Figure 2 This is a rear structural perspective view of a device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to the present invention;

[0025] Figure 3 This is a cross-sectional structural perspective view of a driving mechanism in a device for recording working characteristics of a bimetallic driven self-compensating seal of an air preheater according to the present invention;

[0026] Figure 4 This is a structural stereogram of a compensation amount recording plate in a device for recording working characteristics of a bimetallic driven self-compensating seal of an air preheater according to the present invention;

[0027] Figure 5 This is a cross-sectional structural perspective view of the mounting mechanism in a device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to the present invention;

[0028] Figure 6 This is a structural stereogram of a high-temperature resistant support plate in a device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to the present invention;

[0029] Figure 7 This is a structural stereogram of an air preheater partition plate in an air preheater bimetallic driven self-compensating seal working characteristic recording device of the present invention;

[0030] Figure 8 This invention is a device for recording the working characteristics of an air preheater bimetallic driven self-compensating seal. Figure 7 Enlarged three-dimensional diagram of the structure at point A in the middle.

[0031] Figure: 1. Air preheater partition plate; 2. High-temperature resistant support plate; 3. Bimetallic driven self-compensating sealing mechanism; 4. Mounting mechanism; 401. Mounting block; 402. Empty slot; 403. Bidirectional threaded rod; 404. Third rotating cap; 405. Slot; 406. Fixed rod; 407. Moving plate; 408. Limit rod; 5. Mounting plate; 6. Compensation recording plate; 7. Insert block; 8. Limit hole; 9. Adjustment mechanism; 901. Groove; 902. One-way threaded rod; 903 , second rotating cap; 904, linear guide; 905, guide rail slider; 10, driving mechanism; 1001, fixed shell; 1002, worm; 1003, rotating rod; 1004, worm wheel; 1005, gear; 1006, rack; 1007, fixed plate; 1008, fixed cylinder; 1009, return spring; 1010, slide; 1011, movable rod; 1012, limiting groove; 1013, limiting block; 1014, first rotating cap; 11, marking needle. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] like Figures 1-8 As shown, the present invention provides a technical solution: an air preheater bimetallic driven self-compensating seal working characteristic recording device, comprising an air preheater partition plate 1, a high-temperature resistant support plate 2 and a bimetallic driven self-compensating sealing mechanism 3 are bolted to one side of the air preheater partition plate 1, a mounting mechanism 4 is provided on the inner side of the bimetallic driven self-compensating sealing mechanism 3, a mounting plate 5 is provided at the bottom of the mounting mechanism 4, a compensation amount recording plate 6 is fixedly connected to the bottom of the mounting plate 5, an insert block 7 is fixedly connected to the top of the mounting plate 5, a limiting hole 8 is provided on one side of the insert block 7, an adjustment mechanism 9 is provided on one side of the high-temperature resistant support plate 2, and the adjustment mechanism 9 is fixed on the bottom of the mounting plate 5. A driving mechanism 10 is provided, and a marking needle 11 is provided at one end of the driving mechanism 10. The driving mechanism 10 includes a fixed shell 1001, a worm 1002 is rotatably connected inside the fixed shell 1001, a rotating rod 1003 is rotatably connected inside the fixed shell 1001, a worm wheel 1004 and a gear 1005 are fixedly sleeved on the outer surface of the rotating rod 1003, the worm 1002 is meshingly connected with the worm wheel 1004, a rack 1006 is provided in the fixed shell 1001, one side of the rack 1006 is movable through the fixed shell 1001 and is fixedly connected with a fixed plate 1007, and the rack 1006 is meshingly connected with the gear 1005.

[0034] like Figure 3 As shown, one side of the fixed plate 1007 is fixedly connected to a fixed cylinder 1008, a return spring 1009 is fixedly connected inside the fixed cylinder 1008, a slide 1010 is slidably connected inside the fixed cylinder 1008, and one end of the slide 1010 is fixedly connected to a movable rod 1011. When the movable rod 1011 is subjected to pressure, the movable rod 1011 can drive the slide 1010 to slide in the fixed cylinder 1008. The provision of the slide 1010 improves the stability of the movable rod 1011 during the movement process. At the same time, when the movable rod 1011 slides and squeezes the return spring 1009, the return spring 1009 will undergo corresponding elastic deformation according to the pressure.

[0035] like Figure 3As shown, one end of the movable rod 1011 is movable and passes through the fixed cylinder 1008, and the marking needle 11 is installed at one end of the movable rod 1011. Through the joint cooperation of the fixed cylinder 1008, the return spring 1009, the slide 1010, and the movable rod 1011, the marking needle 11 can always maintain a close fit with the compensation amount recording plate 6, which is conducive to the displacement trajectory being engraved by the marking needle 11 on the surface of the compensation amount recording plate 6, thereby improving practicality.

[0036] like Figure 3 As shown, a limiting groove 1012 is provided on the inner side of the fixed shell 1001, and a limiting block 1013 is slidably connected in the limiting groove 1012. When the rack 1006 moves, the rack 1006 can drive the limiting block 1013 to slide synchronously in the limiting groove 1012. The limiting block 1013 has a limiting effect on the rack 1006. On the one hand, it limits the moving position of the rack 1006, and on the other hand, it improves the stability of the rack 1006 during the movement.

[0037] like Figure 3 As shown, the bottom of the limit block 1013 is fixedly connected to the rack 1006, and the smooth end of the worm 1002 is movable through the fixed shell 1001 and is fixedly installed with a first rotating cap 1014. By setting the first rotating cap 1014, it is convenient for the operator to drive the worm 1002 to rotate through the first rotating cap 1014, thereby improving convenience.

[0038] like Figure 8 As shown, the adjustment mechanism 9 includes a groove 901, which is opened on one side of the high-temperature resistant support plate 2. The top of the inner side of the groove 901 is threadedly connected to a one-way threaded rod 902, and the top of the one-way threaded rod 902 is fixedly installed with a second rotating cap 903. The bottom end of the one-way threaded rod 902 is rotatably connected to the fixed shell 1001. By providing the second rotating cap 903, it is convenient for the operator to drive the one-way threaded rod 902 to rotate through the second rotating cap 903, thereby improving convenience. Since the bottom end of the one-way threaded rod 902 is rotatably connected to the fixed shell 1001, the one-way threaded rod 902 will not restrict the fixed shell 1001 when rotating.

[0039] like Figure 8As shown, a linear guide rail 904 is fixedly installed on the inner side of the groove 901, and a guide rail slider 905 is slidably connected to the linear guide rail 904. The fixed shell 1001 is fixedly connected to one side of the guide rail slider 905. When the one-way threaded rod 902 rotates, the guide rail slider 905 limits the fixed shell 1001. When the one-way threaded rod 902 rotates, the fixed shell 1001 can be driven to move upward under the action of the thread, thereby driving the stylus 11 to move upward, which makes it easy to adjust the height of the stylus 11, and facilitates adjusting the stylus 11 to a position slightly above the center of the compensation recording plate 6, so that the stylus 11 can conveniently record on the surface of the compensation recording plate 6.

[0040] like Figure 5 As shown, the mounting mechanism 4 includes a mounting block 401, an empty slot 402 is opened inside the mounting block 401, a bidirectional threaded rod 403 is rotatably connected in the empty slot 402, the smooth end of the bidirectional threaded rod 403 is movable through the empty slot 402 and the mounting block 401 and is fixedly installed with a third rotating cap 404. By setting the third rotating cap 404, when the operator rotates the third rotating cap 404, the third rotating cap 404 can drive the bidirectional threaded rod 403 to rotate, thereby improving convenience.

[0041] like Figure 5 As shown, a slot 405 is provided at the bottom of the mounting block 401, and a fixing rod 406 is fixedly connected to the empty slot 402. A movable plate 407 is sleeved on the outer surface of the fixing rod 406 and the bidirectional threaded rod 403. By setting the slot 405, the slot 405 and the plug-in block 7 are matched, which facilitates the insertion of the plug-in block 7 into the slot 405. The fixing rod 406 limits the movable plate 407. When the bidirectional threaded rod 403 rotates, the fixing rod 406 limits the movable plate 407, so that the bidirectional threaded rod 403 can drive the two movable plates 407 to move relative to each other.

[0042] like Figure 4 and Figure 5 As shown, one side of the movable plate 407 is fixedly connected to a limiting rod 408, and one end of the limiting rod 408 is movable through the empty slot 402 and the slot 405 and extends into the limiting hole 8. By inserting the plug 7 on the compensation recording plate 6 into the slot 405, and rotating the third rotating cap 404 forward and reversely, the two movable plates 407 can drive the two limiting rods 408 to move relative to each other and away from each other, and the compensation recording plate 6 can be limited and fixed and the restriction can be released, thereby facilitating the installation and disassembly of the compensation recording plate 6 and being convenient to use.

[0043] The usage and working principle of this device: In the preparation stage, insert the plug 7 on the compensation recording plate 6 into the slot 405, and then rotate the third rotating cap 404, so that the third rotating cap 404 drives the bidirectional threaded rod 403 to rotate, and the fixed rod 406 limits the movable plate 407, so that the bidirectional threaded rod 403 drives the two movable plates 407 to move relative to each other, and the two movable plates 407 drive the two limiting rods 408 to move relative to each other and squeeze into the two limiting holes 8, thereby limiting and fixing the compensation recording plate 6, completing the installation of the compensation recording plate 6, and then using bolts, nuts and gaskets to install the high-temperature resistant support plate 2 and the bimetallic driven self-compensating sealing mechanism 3 on the air preheater partition plate 1.

[0044] During the adjustment stage, by rotating the second rotating cap 903, the second rotating cap 903 drives the one-way threaded rod 902 to rotate. Under the action of the thread, the one-way threaded rod 902 drives the fixed shell 1001 to move upward, and the fixed shell 1001 drives the guide rail slider 905 to slide upward on the linear guide rail 904 synchronously, thereby driving the marking needle 11 to move upward, so that the starting position of the marking needle 11 is at a position slightly above the center of the compensation amount recording plate 6.

[0045] During the pressing stage, after the position adjustment of the stylus 11 is completed, the first rotating cap 1014 is rotated, so that the first rotating cap 1014 drives the worm 1002 to rotate. Since the worm 1002 and the worm wheel 1004 are meshed and connected, the worm wheel 1004 drives the rotating rod 1003 to rotate, and the rotating rod 1003 drives the gear 1005 to rotate. Since the gear 1005 and the rack 1006 are meshed and connected, when the gear 1005 rotates, it drives the rack 1006 to move, and the rack 1006 drives the limit block 1013 to move in the limit groove 1012. Synchronous sliding allows the fixed plate 1007 to drive the stylus 11 to move to the surface of the compensation recording plate 6. At the same time, when the stylus 11 contacts the surface of the compensation recording plate 6 and applies a certain pressure, the movable rod 1011 drives the slide 1010 to slide in the fixed cylinder 1008. When the slide 1010 slides, it squeezes the reset spring 1009, and the reset spring 1009 begins to shrink under the squeezing. Under the elastic potential energy of the reset spring 1009, the stylus 11 always maintains close contact with the surface of the compensation recording plate 6.

[0046] In the hot stage, when the air preheater is running, the temperature will rise, and the compensation recording plate 6 will be displaced relative to the stylus 11 as the bimetal-driven self-compensating sealing mechanism 3 deforms, and the displacement trajectory is recorded on the surface of the compensation recording plate 6 by the stylus 11.

[0047] During the shutdown inspection stage, by rotating the first rotating cap 1014, the fixed plate 1007 drives the scratching needle 11 to move and separate from the compensation recording plate 6, and then the high-temperature resistant support plate 2 and the bimetallic driven self-compensating sealing mechanism 3 are removed from the air preheater partition plate 1 in turn, and then the third rotating cap 404 is rotated to make the bidirectional threaded rod 403 drive the two movable plates 407 to move relatively away and separate from the two limiting holes 8, thereby releasing the restriction on the compensation recording plate 6, and then the compensation recording plate 6 is removed, and the scratches left on the compensation recording plate 6 after the thermal deformation of the sealing plate are measured to obtain the compensation data of the bimetallic driven self-compensating seal.

[0048] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater, characterized by: The invention comprises an air preheater partition plate (1), a high temperature resistant support plate (2) and a bimetallic driven self-compensating sealing mechanism (3) are bolted to one side of the air preheater partition plate (1), a mounting mechanism (4) is provided on the inner side of the bimetallic driven self-compensating sealing mechanism (3), a mounting plate (5) is provided at the bottom of the mounting mechanism (4), a compensation amount recording plate (6) is fixedly connected to the bottom of the mounting plate (5), an insert block (7) is fixedly connected to the top of the mounting plate (5), a limiting hole (8) is provided on one side of the insert block (7), an adjustment mechanism (9) is provided on one side of the high temperature resistant support plate (2), a driving mechanism (10) is provided on the adjusting mechanism (9), and one side of the driving mechanism (10) is fixedly connected to the bottom of the mounting plate (5). A stylus (11) is provided at the end, and the driving mechanism (10) includes a fixed shell (1001), a worm (1002) is rotatably connected in the fixed shell (1001), a rotating rod (1003) is rotatably connected in the fixed shell (1001), a worm wheel (1004) and a gear (1005) are fixedly sleeved on the outer surface of the rotating rod (1003), the worm (1002) and the worm wheel (1004) are meshingly connected, a rack (1006) is provided in the fixed shell (1001), one side of the rack (1006) is movably passed through the fixed shell (1001) and is fixedly connected to a fixed plate (1007), and the rack (1006) is meshingly connected to the gear (1005).

2. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 1, characterized in that: A fixed cylinder (1008) is fixedly connected to one side of the fixed plate (1007), a return spring (1009) is fixedly connected inside the fixed cylinder (1008), a sliding plate (1010) is slidably connected inside the fixed cylinder (1008), and one end of the sliding plate (1010) is fixedly connected to a movable rod (1011).

3. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 2, characterized in that: One end of the movable rod (1011) is movably inserted into the fixed cylinder (1008), and the marking needle (11) is mounted on one end of the movable rod (1011).

4. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 2, characterized in that: A limiting groove (1012) is provided on the inner side of the fixed shell (1001), and a limiting block (1013) is slidably connected in the limiting groove (1012).

5. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 4, characterized in that: The bottom of the limit block (1013) is fixedly connected to the rack (1006), and the smooth end of the worm (1002) movably passes through the fixed housing (1001) and is fixedly mounted with a first rotating cap (1014).

6. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 1, characterized in that: The adjusting mechanism (9) comprises a groove (901), wherein the groove (901) is provided on one side of the high temperature resistant support plate (2), a one-way threaded rod (902) is threadedly connected to the top of the inner side of the groove (901), a second rotating cap (903) is fixedly mounted on the top end of the one-way threaded rod (902), and the bottom end of the one-way threaded rod (902) is rotatably connected to the fixed shell (1001).

7. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 6, characterized in that: A linear guide rail (904) is fixedly installed on the inner side of the groove (901), a guide rail slider (905) is slidably connected to the linear guide rail (904), and the fixed shell (1001) is fixedly connected to one side of the guide rail slider (905).

8. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 7, characterized in that: The mounting mechanism (4) comprises a mounting block (401), an empty slot (402) is provided inside the mounting block (401), a bidirectional threaded rod (403) is rotatably connected in the empty slot (402), and a smooth end of the bidirectional threaded rod (403) movably passes through the empty slot (402) and the mounting block (401) and is fixedly mounted with a third rotating cap (404).

9. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 8, characterized in that: A slot (405) is provided at the bottom of the mounting block (401), a fixing rod (406) is fixedly connected in the empty slot (402), and a movable plate (407) is sleeved on the outer surface of the fixing rod (406) and the bidirectional threaded rod (403).

10. The device for recording the working characteristics of a bimetallic driven self-compensating seal of an air preheater according to claim 9, characterized in that: One side of the movable plate (407) is fixedly connected to a limiting rod (408), and one end of the limiting rod (408) movably passes through the empty slot (402) and the slot (405) and extends into the limiting hole (8).

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