Tube plate hole centering mechanism for ash removal of SAR (Synthetic Aperture Radar) heat energy recoverer

Abstract

The utility model relates to the technical field of heat energy recoverers, in particular to a tube plate hole centering mechanism for ash removal of an SAR (synthetic aperture radar) heat energy recoverer, which comprises a machine table, a first sliding mechanism and a second sliding mechanism, wherein a guide sleeve is mounted on the first sliding mechanism, an ash removal gun is movably inserted into the inner side of the guide sleeve, the free end of the guide sleeve is inserted along a tube plate hole of a smoke box, and a far-end supporting point is formed for the rod part of the ash removal gun; the guide sleeve enters the smoke box and supports and restrains the ash removal gun to center a heat exchanger pipe hole only when the ash removal gun enters the smoke box, the guide sleeve stops outside the smoke box in other time, the problem that the ash removal gun deforms due to the influence of high temperature is greatly solved, in addition, the whole mechanism is a movable functional part, does not belong to the smoke box, and is convenient to use. Therefore, the centering function of the ash removal gun is realized under the condition that the smoke box is not subjected to any structural change.

Description

Technical Field

[0001] This utility model relates to the field of heat recovery equipment technology, and in particular to a tube sheet hole alignment mechanism for SAR heat recovery equipment dust removal. Background Technology

[0002] In a waste acid regeneration (SAR) unit, the heat recovery unit is a critical component, functioning to absorb and utilize the heat energy carried by the high-temperature flue gas inside the furnace. However, as the high-temperature flue gas passes through the heat exchanger of the heat recovery unit, scale forms inside the tubes. This scale not only affects heat exchange efficiency but may also pose a safety risk of tube rupture. Therefore, regular cleaning of the heat exchanger tubes is necessary.

[0003] Currently, the primary method for cleaning heat recovery units in waste acid regeneration plants in China is through online cleaning guns. This method involves using a cleaning gun made of stainless steel tubing, which is inserted into the heat exchanger tubes to break up and remove the ash and scale. However, this online cleaning method requires manual operation, posing safety hazards such as direct exposure to high-temperature flue gas, leading to burns or occupational health problems like pneumoconiosis. Furthermore, manual cleaning is inefficient and uneconomical.

[0004] Therefore, researching and developing an automated cleaning mode for the heat recovery unit of a waste acid regeneration device has become an ideal solution. However, during the research process of automated cleaning, a technical challenge was encountered: the cleaning gun was difficult to accurately align with the heat exchanger tube holes. The structure of the heat recovery unit necessitates that the cleaning gun first pass through the tube sheet holes in front of the smoke box, and then through the internal space of the smoke box to reach the heat exchanger tube sheet. Due to the long and unsupported internal space of the smoke box, the cleaning gun is prone to sagging and deformation under high-temperature conditions, as shown in the attached diagram of the instruction manual. Figure 1 As shown, this makes it difficult to align the nozzle with the heat exchanger tube holes. While this can be resolved manually through real-time observation and adjustment, automated equipment struggles to autonomously assess and adapt to this uncertainty, making automated alignment challenging. Utility Model Content

[0005] The purpose of this invention is to solve the shortcomings of existing technologies, such as the large sagging and deformation of the section of the slender cleaning gun entering the smoke box due to its long cantilever distance and high temperature environment. Therefore, this invention proposes a tube plate hole alignment mechanism for cleaning the SAR heat recovery unit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a tube sheet hole alignment mechanism for cleaning SAR thermal energy recovery unit, including a machine base, a first sliding mechanism and a second sliding mechanism sliding above the machine base;

[0008] The first sliding mechanism is equipped with a guide sleeve, and a cleaning gun is movably inserted into the inner side of the guide sleeve. The free end of the guide sleeve is inserted along the tube plate hole of the smoke box and forms a distal support point for the rod of the cleaning gun.

[0009] A fixing mechanism for fixing the tail end of the cleaning gun is also installed on the second sliding mechanism.

[0010] Furthermore, the first sliding mechanism includes a slide block slidably connected above the machine base, and a power assembly is provided between the slide block and the machine base;

[0011] The upper end of the slide is also fixedly mounted with a support base, and the guide sleeve is fixed to the inner side of the support base.

[0012] Furthermore, the power assembly includes a motor fixed on the slide, a gear fixed on the shaft end of the motor, and a rack that meshes with the gear and drives the transmission on the top of the machine base.

[0013] Furthermore, the second sliding mechanism has the same structure as the first sliding mechanism.

[0014] Furthermore, the fixing mechanism includes a mounting base installed on the second sliding mechanism and a fixing plate fixed to the side of the mounting base. The end face of the fixing plate is provided with a clamping structure and a plurality of support columns, and the plurality of support columns form a placement space for accommodating the dust removal gun.

[0015] Furthermore, the clamping structure includes a clamping arm hinged to the side of the fixed disk, and a drive rod is movably inserted into the middle of the fixed disk;

[0016] The outer side of the drive rod is pinned to a connecting rod, and the distal end of the connecting rod is pinned to the clamping arm.

[0017] Furthermore, an end seat is fixedly installed at the end of the drive rod, and the connecting rod is pinned to the end seat;

[0018] A spring is fixedly connected between the end seat and the fixed plate, and a drive component for driving the drive rod to move is fixed to the back end of the mounting base.

[0019] Furthermore, a groove is provided axially on the outer periphery of the drive rod, and a number of wedge-shaped teeth are distributed at intervals on the inner side of the groove;

[0020] A limiting plate is slidably connected to the end face of the mounting base via a compression spring. The end face of the limiting plate has a through hole for accommodating the drive rod, and a card is fixedly installed in the through hole, which is locked between two adjacent wedge teeth. A magnet is provided at the bottom of the limiting plate, and an electromagnet is provided on the end face of the mounting base opposite to the magnet.

[0021] Furthermore, the guide sleeve has a hollow cavity, and a connector connected to the hollow cavity is installed on the outer side of the guide sleeve.

[0022] Furthermore, this utility model also proposes a method for aligning tube sheet holes during SAR heat recovery unit cleaning, which uses the aforementioned mechanism. The method includes:

[0023] Open the tube sheet hole cover of the smoke box and move the machine so that the cleaning gun and guide sleeve are in front of the tube sheet hole.

[0024] The cleaning gun and the guide sleeve move forward synchronously, extending into the smoke box through the guide tube from the tube sheet hole;

[0025] After the guide sleeve reaches the position inside the smoke box, it stops moving forward, and the cleaning gun continues to advance until it is close to the heat exchanger tube opening;

[0026] After the cleaning gun head enters the heat exchanger tube, it temporarily stops advancing, while the guide sleeve exits the smoke box after the cleaning gun head enters the heat exchanger tube.

[0027] The cleaning gun continues to advance, passing through the heat exchanger tubes to clean the ash and scale inside the tubes;

[0028] After cleaning one heat exchanger tube with the cleaning gun, it is removed from the smoke box and then moved to the next tube sheet hole, repeating the above sequence of actions.

[0029] The tube sheet hole alignment mechanism for cleaning SAR heat recovery unit proposed in this utility model has the following advantages: The guide sleeve in this utility model only enters the smoke box together with the cleaning gun when it enters the smoke box and supports and constrains the cleaning gun to align the heat exchanger tube hole. At other times, it stays outside the smoke box, which greatly reduces the problem of deformation caused by high temperature. In addition, the whole mechanism is a movable functional component and does not belong to the smoke box. Therefore, the alignment function of the cleaning gun is realized without making any structural changes to the smoke box.

[0030] Secondly, the guide sleeve is small in size and does not occupy too much space inside the smoke box. It will not affect the flow of flue gas inside the smoke box and has virtually no impact on the heat exchange process parameters. At the same time, the guide sleeve adopts a hollow structure design, and circulating cooling medium can be introduced into its interior to cool the inside of the tube, preventing it from undergoing thermal deformation and maintaining good rigidity to support the cleaning gun. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the state of the cleaning rod during operation in the existing technology;

[0032] Figure 2 This is a schematic diagram of the structure of this utility model;

[0033] Figure 3 This is a schematic diagram showing the movement of the cleaning gun and guide sleeve of this utility model;

[0034] Figure 4 This is a schematic diagram of the state of the guide sleeve when it retracts according to this utility model;

[0035] Figure 5 This is a schematic diagram of the ash removal gun of this utility model during centering.

[0036] Figure 6 This is a schematic diagram showing the state of the cleaning rod during cleaning operations.

[0037] Figure 7 This is a schematic diagram of the fixing mechanism structure of this utility model. Figure 1 ;

[0038] Figure 8 This is a schematic diagram of the fixing mechanism structure of this utility model. Figure 2 ;

[0039] Figure 9 for Figure 8 A magnified structural diagram of area A.

[0040] In the diagram: 1. Machine base; 2. First sliding mechanism; 21. Slide seat; 22. Power assembly; 3. Second sliding mechanism; 4. Guide sleeve; 41. Support seat; 5. Ash cleaning gun; 6. Smoke box; 61. Tube plate hole; 7. Fixing mechanism; 71. Mounting seat; 72. Fixing plate; 73. Clamping structure; 731. Clamping arm; 732. Drive rod; 733. Connecting rod; 734. End seat; 735. Spring; 736. Drive component; 74. Support column; 75. Wedge tooth; 76. Compression spring; 77. Limiting plate; 78. Card; 79. Magnet; 8. Electromagnet. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0042] Reference Figure 2-9As an embodiment of this utility model, it specifically discloses a tube sheet hole alignment mechanism for cleaning SAR heat energy recovery unit. This mechanism can significantly reduce the deformation of the cleaning gun 5 in the smoke box, making it easier to align the cleaning gun 5 with the tube holes of the SAR heat energy recovery unit heat exchanger, thus meeting the needs of automated cleaning of the device. The mechanism has a simple structure, reliable operation, and good alignment effect.

[0043] Specifically, the mechanism includes a machine base 1, a first sliding mechanism 2 and a second sliding mechanism 3 that slide above the machine base 1. In this preferred embodiment, the machine base 1 can be configured as a liftable lifting platform. The lifting platform drives the first sliding mechanism 2 and the second sliding mechanism 3 to move up and down to adapt to tube plate holes 61 of different heights. The lifting platform structure is existing technology and will not be described in detail here.

[0044] The first sliding mechanism 2 is equipped with a guide sleeve 4, and a dust removal gun 5 is movably inserted into the inner side of the guide sleeve 4. The free end of the guide sleeve 4 is inserted into the tube plate hole 61 of the smoke box 6 and forms a distal support point for the rod of the dust removal gun 5.

[0045] A fixing mechanism 7 for fixing the tail end of the cleaning gun 5 is also installed on the second sliding mechanism 3.

[0046] In some embodiments, the first sliding mechanism 2 of the present invention includes a slide block 21 slidably connected above the machine base 1. In this embodiment, the slide block 21 can be slidably connected to the machine base 1 via a linear guide rail and a slider. Of course, the linear guide rail is fixed above the machine base 1, and a power component 22 is provided between the slide block 21 and the machine base 1.

[0047] The upper end of the slide 21 is also fixedly mounted with a support 41, and the guide sleeve 4 is fixed to the inner side of the support 41.

[0048] Based on the above embodiments, the power assembly 22 in this embodiment includes a motor fixed on the slide 21, a gear fixed on the shaft end of the motor, and a rack that meshes with the gear and drives the transmission on the top of the machine base 1.

[0049] During operation, the motor drives the gear to rotate. Since the gear meshes with the rack, it drives the entire slide 21 to move laterally on the machine base 1. This allows the guide sleeve 4 to move linearly and enter the interior of the smoke box 6 along the tube plate hole 61.

[0050] Furthermore, the preferred structure of the second sliding mechanism 3 and the first sliding mechanism 2, that is, the second sliding mechanism 3 also adopts a motor, gear and rack structure for driving movement. Of course, the motor mentioned in this embodiment is preferably set as a servo motor. During the initial movement, the two motors need to keep moving synchronously to ensure that the dust cleaning gun 5 can follow and move synchronously while the guide sleeve 4 is inserted into the pipe plate hole 61. Secondly, the control method of the first sliding mechanism 2 and the second sliding mechanism 3 is used to realize the independent control of the guide sleeve 4 and the dust cleaning gun 5.

[0051] Reference Figure 7 , 8 In some embodiments, the fixing mechanism 7 of this utility model includes a mounting base 71 installed on the second sliding mechanism 3 and a fixing plate 72 fixed on the side of the mounting base 71. The mounting base 71 has a U-shaped structure and is fixed on the slide block 21 of the second sliding mechanism 3 by fasteners such as bolts. The end face of the fixing plate 72 is provided with a clamping structure 73 and a plurality of support columns 74. The plurality of support columns 74 form a placement space for accommodating the dust removal gun 5.

[0052] Specifically, in this embodiment of the utility model, a design using multiple support columns 74 is adopted to support the tail end of the cleaning gun 5 during initial installation. During installation, the tail end of the cleaning gun 5 is first inserted into the placement space formed by multiple support columns 74, and supported by multiple support columns 74 to facilitate subsequent clamping actions.

[0053] Reference Figure 7 Based on the above embodiments, the clamping structure 73 in this embodiment includes a clamping arm 731 hinged to the side of the fixed disk 72, and a drive rod 732 is movably inserted into the middle of the fixed disk 72.

[0054] The outer side of the drive rod 732 is pinned to a connecting rod 733, and the distal end of the connecting rod 733 is pinned to the clamping arm 731.

[0055] Furthermore, in this embodiment, three clamping arms 731 and three supporting columns 74 are provided, and the clamping arms 731 and the supporting columns 74 are arranged alternately. The movement of the clamping arms 731 is controlled by the drive rod 732. For example, when the drive rod 732 is pulled backward, it will drive the connecting rod 733 to move. The connecting rod 733 pulls the clamping arms 731 to rotate, so as to realize the clamping action of the dust cleaning gun 5. In this way, the connection between the second sliding mechanism 3 and the dust cleaning gun 5 is realized, ensuring the stability of subsequent driving.

[0056] Reference Figure 7In a preferred embodiment, the end of the drive rod 732 is fixedly mounted with an end seat 734, and the connecting rod 733 is pinned to the end seat 734.

[0057] A spring 735 is fixedly connected between the end seat 734 and the fixed plate 72. The spring 735 is provided to enhance the reset stability of the drive rod 732. In addition, a drive member 736 for driving the drive rod 732 to move is fixed to the back end of the mounting base 71.

[0058] In this specific embodiment, the driving component 736 is configured as a cylinder. The cylinder is fixed on the inner side of the mounting base 71. A connecting plate is fixedly connected to the shaft end of the cylinder. The other end of the connecting plate is fixed to the end of the driving rod 732. During clamping, the cylinder shaft end extends to drive the driving rod 732 to move backward. When the driving rod 732 moves backward, multiple clamping arms 731 can be controlled to clamp the tail end of the dust removal gun 5. The operation is simple and convenient.

[0059] Of course, in other embodiments, the drive component 736 can also be configured as a hydraulic cylinder. Those skilled in the art can choose according to actual needs, and will not elaborate further here.

[0060] Reference Figure 8 , 9 Considering that if the drive component 736 is damaged and cannot provide thrust during operation, the spring 735 will pull the drive rod 732 forward, which will lead to clamping failure, the present invention also includes a structure for mechanically locking the drive rod 732 in a fixed position.

[0061] Specifically, in this utility model, a groove is provided along the axial direction on the outer periphery of the drive rod 732, and a plurality of wedge-shaped teeth 75 are distributed at intervals on the inner side of the groove. The inclined surface of the wedge-shaped teeth 75 faces the side of the drive rod 732 that is moved backward, which is used for the effect of subsequent one-way locking.

[0062] A limiting plate 77 is slidably connected to the end face of the mounting base 71 via a compression spring 76. In this embodiment, a slot is formed on the end face of the limiting plate 77, and a bolt located in the slot is fixedly installed on the end face of the mounting base 71, thereby guiding the sliding of the limiting plate 77. In addition, in this embodiment, the two ends of the compression spring 76 are respectively fixed to the end face of the limiting plate 77 and the mounting base 71.

[0063] Reference Figure 9The limiting plate 77 has a through hole on its end face to accommodate the drive rod 732, and a card 78 is fixedly installed in the through hole and locked between two adjacent wedge teeth 75. A magnet 79 is provided at the bottom of the limiting plate 77, and an electromagnet 8 is provided on the end face of the mounting base 71 opposite to the magnet 79. It should be noted that when the electromagnet 8 is energized, the magnetic properties of its opposite face to the magnet 79 are opposite, thus pushing the entire limiting plate 77 upward to unlock the drive rod 732.

[0064] During operation, when the cylinder shaft extends, the electromagnet 8 is not working. The compression spring 76 pushes the limiting plate 77 downward until the card 78 at the bottom of the limiting plate 77 engages between the two wedge teeth 75 in the groove. Due to the structural characteristics of the wedge teeth 75, when the drive rod 732 moves, the wedge teeth 75 will push against the card 78 upward, causing the limiting plate 77 to move upward. That is, the limiting plate 77 will not limit the drive rod 732 in the backward direction, but will limit the drive rod 732 in the forward direction to lock its position. Even if the cylinder is damaged, the limiting plate 77 will mechanically lock the drive rod 732 to ensure the clamping stability of the dust cleaning gun 5 and avoid the problem of clamping failure.

[0065] Of course, when it is necessary to unlock the cleaning gun 5 normally, the electromagnet 8 will work first. Since the magnetism of the electromagnet 8 is opposite to that of the magnet 79, it will push the entire limiting plate 77 to move upward so that the card 78 is separated from the wedge tooth 75. After that, the cylinder can retract freely, drive the drive rod 732 to move forward, and make the clamp arm 731 rotate and separate from the cleaning gun 5, thus completing the unlocking action.

[0066] In a further embodiment, the guide sleeve 4 of this utility model has a hollow cavity, and a connector connected to the hollow cavity is installed on the outer side of the guide sleeve 4. That is, the guide sleeve 4 of this utility model adopts a hollow structure design. In actual use, a cooling medium, such as circulating water or air, can be connected through the connector to prevent the guide sleeve 4 from undergoing thermal deformation and to maintain good rigidity to support the dust removal gun.

[0067] Furthermore, in this utility model, a tube sheet hole alignment method for cleaning SAR heat recovery unit utilizes the aforementioned mechanism, and the specific method includes the following steps:

[0068] Reference Figure 2 100. Open the tube cover of the tube plate hole 61 of the smoke box 6, and move the machine platform 1 so that the cleaning gun 5 and the guide sleeve 4 are facing the tube plate hole 61 in front.

[0069] Reference Figure 3 200, the dust removal gun 5 and the guide sleeve 4 move forward synchronously and extend into the smoke box 6 through the guide tube of the tube plate hole 61;

[0070] Reference Figure 4 300. After the guide sleeve 4 reaches the position inside the smoke box 6, it stops moving forward and the cleaning gun 5 continues to advance to the vicinity of the heat exchanger tube.

[0071] 400. After the head of the cleaning gun 5 enters the heat exchanger tube, it temporarily stops moving forward. The guide sleeve 4 exits the smoke box 6 after the head of the cleaning gun 5 enters the heat exchanger tube. The exit of the guide sleeve 4 and its stop outside the smoke box can avoid the influence of the high temperature flue gas inside on the guide sleeve 4 and effectively reduce the thermal deformation of the guide sleeve 4.

[0072] Reference Figure 5 , 6 500, the cleaning gun 5 continues forward, passing through the heat exchanger tubes to clean the ash and scale inside the tubes;

[0073] 600. After cleaning one heat exchanger tube with the cleaning gun 5, exit the smoke box 6 and then move to the next tube sheet hole 61 to repeat the above sequence of actions.

[0074] In summary, in this invention, the guide sleeve 4 and the cleaning gun 5 are fitted with a gap. Due to the small gap, the guide sleeve 4 can effectively constrain the cleaning gun 5. When the guide sleeve 4 extends into the smoke box 6, the cleaning gun 5 extends out of the guide sleeve 4. At this time, the front end of the guide sleeve 4 becomes the support point of the cleaning gun 5. Compared with the original support position of the guide tube on the smoke box 6, the support point has actually moved forward by a relatively long distance. Therefore, the overhang distance of the cleaning gun 5 is shortened, which greatly reduces the droop and deformation of the extended part of the cleaning gun 5. The deviation generated by the cleaning gun head is less than the inner diameter of the heat exchange tube hole. In this way, the cleaning gun head can be aligned with the tube hole entering the heat exchanger. The length of the guide sleeve 4 can be determined according to the actual needs of the cleaning gun 5 alignment, as long as it can meet the alignment requirements of the cleaning gun 5.

[0075] In this utility model, the guide sleeve 4 only enters the smoke box 6 together with the cleaning gun 5 when it enters the smoke box, and supports and constrains the cleaning gun 5 to center the heat exchanger tube hole. At other times, it stays outside the smoke box 6, which greatly reduces the problem of deformation caused by high temperature. In addition, the whole mechanism is a movable functional component and does not belong to the smoke box 6. Therefore, the centering function of the cleaning gun 5 is achieved without making any structural changes to the smoke box 6.

[0076] Secondly, the guide sleeve 4 is small in size and does not occupy too much space inside the smoke box 6. It will not affect the flow of flue gas inside the smoke box 6 and has virtually no impact on the heat exchange process parameters. At the same time, the guide sleeve 4 adopts a hollow structure design, and circulating cooling medium can be introduced into its interior to cool the inside of the tube, preventing it from undergoing thermal deformation and maintaining good rigidity to support the cleaning gun 5.

[0077] In summary, this tube sheet hole alignment mechanism achieves the alignment requirement of the tube sheet hole without any structural changes to the heat recovery unit. Its structure is simple and reliable, and it is a key functional component for realizing automated dust removal of the SAR heat recovery unit.

[0078] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tube sheet hole alignment mechanism for ash removal in a SAR heat recovery unit, characterized in that, It includes a machine base (1), a first sliding mechanism (2) and a second sliding mechanism (3) that slide above the machine base (1); The first sliding mechanism (2) is equipped with a guide sleeve (4), and a cleaning gun (5) is movably inserted into the inner side of the guide sleeve (4). The free end of the guide sleeve (4) is inserted into the tube plate hole (61) of the smoke box (6) and forms a far end support point for the rod of the cleaning gun (5). A fixing mechanism (7) for fixing the tail end of the cleaning gun (5) is also installed on the second sliding mechanism (3).

2. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 1, characterized in that: The first sliding mechanism (2) includes a slide (21) slidably connected above the machine base (1), and a power assembly (22) is provided between the slide (21) and the machine base (1); The upper end of the slide (21) is also fixedly installed with a support (41), and the guide sleeve (4) is fixed to the inner side of the support (41).

3. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 2, characterized in that: The power assembly (22) includes a motor fixed on the slide (21), a gear fixed on the shaft end of the motor, and a rack that meshes with the gear is fixedly installed on the top of the machine base (1).

4. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 1, characterized in that: The second sliding mechanism (3) has the same structure as the first sliding mechanism (2).

5. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 1, characterized in that: The fixing mechanism (7) includes a mounting base (71) installed on the second sliding mechanism (3) and a fixing plate (72) fixed on the side of the mounting base (71). The end face of the fixing plate (72) is provided with a clamping structure (73) and a plurality of support columns (74). The plurality of support columns (74) form a placement space for accommodating the dust removal gun (5).

6. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 5, characterized in that: The clamping structure (73) includes a clamping arm (731) hinged to the side of the fixed disk (72), and a drive rod (732) is movably inserted into the middle of the fixed disk (72); The outer side of the drive rod (732) is pinned to a connecting rod (733), the distal end of which is pinned to the clamping arm (731).

7. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 6, characterized in that: An end seat (734) is fixedly installed at the end of the drive rod (732), and the connecting rod (733) is pinned to the end seat (734); A spring (735) is fixedly connected between the end seat (734) and the fixed plate (72), and a drive member (736) for driving the drive rod (732) to move is fixed to the back end of the mounting base (71).

8. The tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to claim 7, characterized in that: A groove is provided along the axial direction on the outer periphery of the drive rod (732), and a number of wedge-shaped teeth (75) are distributed at intervals on the inner side of the groove; A limiting plate (77) is slidably connected to the end face of the mounting base (71) by a compression spring (76). The end face of the limiting plate (77) is provided with a through hole to accommodate the driving rod (732), and a card (78) is fixedly installed in the through hole and locked between two adjacent wedge teeth (75). A magnet (79) is provided at the bottom of the limiting plate (77), and an electromagnet (8) opposite to the magnet (79) is provided on the end face of the mounting base (71).

9. A tube sheet hole alignment mechanism for SAR heat recovery unit ash removal according to any one of claims 1-8, characterized in that: The guide sleeve (4) has a hollow cavity, and a connector connected to the hollow cavity is installed on the outer side of the guide sleeve (4).

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