Device for cleaning strip-shaped foreign matters between pipes of steam generator

Abstract

The utility model discloses a cleaning device for strip-shaped foreign matters among steam generator pipes, which relates to the technical field of steam generator maintenance and comprises a mounting shell, a driving component is arranged in the mounting shell and is of an L-shaped structure, and a first fixing disc is arranged at the top of the driving component; one end of the driving assembly penetrates through the first fixing disc to be connected with a clamping assembly, a second fixing disc is arranged at the top of the clamping assembly, a clamping assembly is arranged at the top of the second fixing disc, and an air bag is arranged at the top of the clamping assembly; and a protection assembly is arranged between the mounting shell and the clamping assembly. According to the steam generator, the driving assembly and the clamping assembly are arranged, when fixed strip-shaped foreign matter and liquid foreign matter or small particles are contained in the pipe space, the driving assembly is used for driving the clamping assembly to preliminarily take out the solid strip-shaped foreign matter, the steam generator is prevented from being blocked during operation, and the preliminary cleaning efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steam generator maintenance technology, specifically to a device for cleaning strip-shaped foreign objects between pipes of a steam generator. Background Technology

[0002] A steam generator is a device that uses the thermal energy of fuel or other energy sources to heat water and convert it into steam. Strip-shaped foreign objects located between the tubes of a steam generator refer to elongated foreign objects or liquid residue deposits (e.g., scale, metal oxides, mechanical debris) that appear within the secondary side tube bundle of the steam generator. These need to be removed using a strip-shaped foreign object cleaning device to extend the lifespan of the tube bundle.

[0003] For example, patent application CN209672936U discloses a device for collecting blocky foreign objects between tubes in a steam generator. This device is guided into the narrow tube bundle by a push-pull guide device, and uses an elastic wire cage to grab strip-shaped foreign objects at specific points, ensuring the effectiveness of foreign object removal.

[0004] Existing strip-shaped foreign object removal devices, while capable of collecting and removing foreign objects between pipes, suffer from several drawbacks. Since foreign objects in pipes are not limited to strip-shaped items, these devices sometimes fail to completely remove them. This results in only strip-shaped foreign objects being collected, while other types remain unremoved, impacting cleaning efficiency and pipeline lifespan.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in related technologies, this utility model proposes a strip-shaped foreign object cleaning device between steam generator tubes to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A device for cleaning strip-shaped foreign objects between pipes of a steam generator includes a mounting shell. Inside the mounting shell is a drive assembly with an L-shaped structure. A first fixing plate is located on the top of the drive assembly. One end of the drive assembly passes through the first fixing plate and is connected to a clamping assembly. A second fixing plate is located on the top of the clamping assembly, and a locking assembly is located on the top of the second fixing plate. An air bladder is located on the top of the locking assembly. A protective assembly is located between the mounting shell and the clamping assembly. The first and second fixing plates are connected by support columns. A material collection hole is located at one end of the air bladder. An air inlet block is located on the outer circumference of the air bladder, and several air inlet holes are opened on the top of the air inlet block. Fixing columns are symmetrically arranged on both sides of the bottom of the air bladder, and a disc is located at the bottom of each fixing column.

[0009] Furthermore, to prevent blockage during continued cleaning and improve initial cleaning efficiency, the drive assembly includes a pull column disposed inside the mounting housing. A first end block is symmetrically disposed at one end of the pull column, and the pull column and the first end block are connected by a pin. A handle is disposed at the bottom of the first end block, and one end of the handle is connected to the mounting housing by a pin. A first compression spring is sleeved on the outer sidewall of the other end of the pull column, and a connecting column is connected to the top of the pull column. Annular limit blocks are disposed at both ends of the first compression spring on the inner side of the mounting housing.

[0010] Furthermore, to initially clamp the strip-shaped foreign object and drive the airbag to adsorb liquid foreign objects or small particles, the clamping assembly includes a drive column that penetrates the first fixed plate at the top of the connecting column. A drive plate is mounted on the top of the drive column, and several driven plates with a triangular structure are arranged on the outer side of the drive plate. One end of each driven plate is connected to a clamping claw. A second end block is mounted on the top of the first fixed plate to mate with the bottom of the clamping claw. Both the second end block and the driven plates are bolted to the clamping claw. The second fixed plate has a movable groove that mates with the clamping claw.

[0011] Furthermore, in order to improve cleaning efficiency, reduce the skill requirements of operators, and improve the convenience of cleaning work, the locking assembly includes a locking plate set on the top of the second fixed plate. The top of the locking plate has three sets of locking grooves. The locking grooves are respectively equipped with locking blocks and second compression springs on both sides. The top of the second compression spring is equipped with a stop block. The bottom of the disc is equipped with a fixing block that cooperates with the locking groove. The fixing block is equipped with locking holes that cooperate with the locking block.

[0012] Furthermore, in order to prevent foreign objects from falling into the foreign object cleaning device, improve the service life of the device, and reduce the maintenance cost of the device, the protective component includes a first protective shell disposed on the outer side wall of the mounting shell and close to the clamping component, and the inner wall of the first protective shell is provided with several limiting grooves; a second protective shell is disposed inside the first protective shell, and several sliders that cooperate with the limiting grooves are disposed on the outer side of the second protective shell.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By setting up a drive component and a clamping component, when there are fixed strip-shaped foreign objects, liquid foreign objects or small particles inside the pipe, the drive component drives the clamping component to initially remove the solid strip-shaped foreign objects, preventing the steam generator from being blocked during operation and improving the initial cleaning efficiency.

[0015] 2. By incorporating a locking assembly and an airbag, when there are still liquid foreign objects or small particles inside the tube, the locking assembly secures the airbag. In conjunction with the drive assembly and clamping assembly, the clamping assembly creates negative pressure on the airbag, forcing the liquid foreign objects or small particles into its interior. The air intake block and air intake hole on the airbag allow air to enter, causing the airbag to inflate automatically, reducing manual intervention and lowering labor costs. After the airbag is cleaned or filled with liquid foreign objects or small particles, the locking assembly can be removed to clean the remaining liquid foreign objects or small particles from the airbag, improving cleaning efficiency, reducing the skill requirements for operators, and increasing the convenience of the cleaning work.

[0016] 3. By incorporating protective components, the device extends backward to prevent foreign objects from falling into its interior when cleaning foreign objects, thus extending the device's lifespan and reducing maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a strip-shaped foreign object cleaning device between tubes of a steam generator according to an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of a strip-shaped foreign object cleaning device between tubes of a steam generator according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the drive assembly in a steam generator tube strip foreign object cleaning device according to an embodiment of the present invention;

[0021] Figure 4 This is a partial structural schematic diagram of a strip-shaped foreign object cleaning device between tubes of a steam generator according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the clamping component in a steam generator tube strip foreign object cleaning device according to an embodiment of the present utility model;

[0023] Figure 6 This is a second partial structural schematic diagram of a strip-shaped foreign object cleaning device between pipes of a steam generator according to an embodiment of the present utility model;

[0024] Figure 7This is a schematic diagram of the airbag structure of a strip-shaped foreign object cleaning device between pipes of a steam generator according to an embodiment of the present utility model.

[0025] In the picture:

[0026] 1. Mounting housing; 2. Drive assembly; 201. Pull post; 202. First end block; 203. Handle; 204. First compression spring; 205. Connecting post; 206. Annular limiting block; 3. First fixing plate; 4. Clamping assembly; 401. Drive post; 402. Drive plate; 403. Driven plate; 404. Clamping claw; 405. Second end block; 406. Movable groove; 5. Second fixing plate; 6. Engaging assembly; 601. Snap-fit ​​tray; 602. Snap-fit ​​groove; 603. Snap-fit ​​block; 604. Second compression spring; 605. Stop block; 606. Fixing block; 607. Snap-fit ​​hole; 7. Airbag; 8. Protective assembly; 801. First protective shell; 802. Limiting groove; 803. Second protective shell; 804. Sliding block; 9. Support column; 10. Material receiving hole; 11. Air inlet block; 12. Air inlet; 13. Fixing column; 14. Disc. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] According to an embodiment of the present invention, a device for cleaning strip-shaped foreign objects between tubes of a steam generator is provided.

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-7 As shown, a strip-shaped foreign object cleaning device for the inter-tube structure of a steam generator according to an embodiment of the present invention includes a mounting shell 1. A drive assembly 2 is disposed inside the mounting shell 1. The drive assembly 2 has an L-shaped structure, and a first fixing plate 3 is disposed on the top of the drive assembly 2. One end of the drive assembly 2 passes through the first fixing plate 3 and is connected to a clamping assembly 4. A second fixing plate 5 is disposed on the top of the clamping assembly 4, and a locking assembly 6 is disposed on the top of the second fixing plate 5. An airbag 7 is disposed on the top of the locking assembly 6. A protective assembly 8 is disposed between the mounting shell 1 and the clamping assembly 4. The first fixing plate 3 and the second fixing plate 5 are connected by a support column 9. A material collection hole 10 is disposed at one end of the airbag 7. An air inlet block 11 is disposed on the outer circumference of the airbag 7, and a plurality of air inlet holes 12 are opened on the top of the air inlet block 11. Fixing columns 13 are symmetrically disposed on both sides of the bottom of the airbag 7, and a disc 14 is disposed at the bottom of the fixing column 13.

[0030] Furthermore, when the clamping assembly 4 squeezes the airbag 7, the gas inside the airbag 7 flows out through the receiving hole 10; when released, when the airbag 7 generates internal negative pressure due to initial elastic deformation (such as after being compressed by external force), the ambient air flows into the airbag 7 autonomously through the air inlet block 11 and air inlet hole 12 under the action of pressure difference, until the pressure inside and outside the airbag is balanced, achieving passive self-inflation, so that the airbag 7 returns to its original shape. The airbag 7 is existing technology and will not be described in detail here.

[0031] By employing the above-mentioned technical solution of this utility model, which includes a locking component 6 and an airbag 7, when there are still liquid foreign objects or small particles inside the tube, the locking component 6 is used to lock and fix the airbag 7. In cooperation with the driving component 2 and the clamping component 4, the clamping component 4 generates negative pressure on the airbag 7, allowing the liquid foreign objects or small particles to enter the airbag 7. Furthermore, the air inlet block and air inlet hole on the airbag 7 allow air to enter, resulting in automatic inflation of the airbag 7, reducing manual intervention and lowering labor costs. After the airbag 7 is cleaned or filled with liquid foreign objects or small particles, the locking component 6 is removed to clean the liquid foreign objects or small particles inside the airbag 7, improving cleaning efficiency, reducing the skill requirements of operators, and increasing the convenience of cleaning work.

[0032] In one embodiment, the drive assembly 2 includes a pull column 201 disposed inside the mounting housing 1. A first end block 202 is symmetrically disposed at one end of the pull column 201. The pull column 201 and the first end block 202 are connected by a pin. A handle 203 is disposed at the bottom of the first end block 202. One end of the handle 203 is connected to the mounting housing 1 by a pin. A first compression spring 204 is sleeved on the outer sidewall of the other end of the pull column 201. A connecting column 205 is connected to the top of the pull column 201. Annular limiting blocks 206 are disposed at both ends of the first compression spring 204 on the inner side of the mounting housing 1 to prevent blockage during continued cleaning and improve the initial cleaning efficiency.

[0033] In one embodiment, the clamping assembly 4 includes a drive column 401 that passes through the first fixed disk 3 and is disposed at the top of the connecting column 205. A drive plate 402 is disposed at the top of the drive column 401. Several driven plates 403 are disposed in a triangular structure on the outer side of the drive plate 402. One end of each driven plate 403 is connected to a clamping claw 404. A second end block 405 is disposed at the top of the first fixed disk 3 to cooperate with the bottom of the clamping claw 404. The second end block 405 and the driven plates 403 are bolted to the clamping claw 404. The second fixed disk 5 has a movable groove 406 that cooperates with the clamping claw 404, thereby initially clamping the strip-shaped foreign object and driving the airbag 7 to adsorb liquid foreign objects or small particles.

[0034] Working principle of drive assembly 2 and clamping assembly 4: When a solid foreign object is seen between the tubes, the first compression spring 204 is in its natural state. At this time, the driven plate 403 and the clamping claw 404 are in a relaxed state. The operator presses down the handle 203, which drives the first end block 202 at the top to move backward. When the first compression spring 204 is compressed backward, the annular limiting block 206 prevents the first compression spring 204 and the pull column 201 from disengaging from the mounting shell 1 and limits the first compression spring 204. Then, the pull column 201 drives the connecting column 205 and the drive column 401 to move backward, and the drive plate 402 moves backward synchronously. The drive plate 402 moves the driven plate 403 towards the center under the triangular structure. With the cooperation of the second end block 405 and the driven plate 403, the clamping claw 404 clamps the strip-shaped foreign object. Conversely, when the grip 203 is released, the first compression spring 204 releases its elastic potential energy, pushing the connecting post 205 and the drive post 401 forward to reset. The drive plate 402 resets, causing the driven plate 403 to open forward, and the clamping claw 404 to release. The negative pressure generation mechanism compresses the air bladder when the clamping claw 404 closes, drawing in liquid foreign objects or small particles from between the pipes. The movable groove 406 ensures structural stability during clamping.

[0035] In one embodiment, the locking assembly 6 includes a locking plate 601 disposed on the top of the second fixed plate 5. The top of the locking plate 601 has three sets of locking grooves 602. The locking grooves 602 are respectively provided with locking blocks 603 and second compression springs 604 on both sides inside. The top of the second compression springs 604 is provided with a stop block 605. The bottom of the disc 14 is provided with a fixing block 606 that cooperates with the locking grooves 602. The fixing block 606 is provided with locking holes 607 that cooperate with the locking blocks 603, thereby improving the cleaning efficiency, reducing the skill requirements of the operator, and improving the convenience of the cleaning work.

[0036] The working principle of the locking assembly 6: After the solid foreign object is removed, the fixing block 606 protrudes partially from the inner wall of the locking groove 602 under the action of the second compression spring 604 moving backward, and the stop block 605 restricts the displacement of the fixing block 606. The locking hole 607 on the fixing block 606 of the disc 14 is aligned with the locking block 603 inside the locking groove 602 and inserted. The outer wall of the fixing block 606 presses against the second compression spring 604, causing it to retract. After the locking hole 607 on the fixing block 606 is aligned with the locking block 603 inside the locking groove 602 and engaged, the stop block 605 restricts the movement of the fixing block 606, thus securing it in place. At this time, the stop block 605 contacts the fixing block 606, preventing the second compression spring 604 from resetting. The clamping assembly 4 presses and adsorbs the airbag 7. Conversely, the fixing block 606 moves backward according to the trajectory of the snap-fit ​​groove 602, so that the snap-fit ​​hole 607 on the fixing block 606 disengages from the snap-fit ​​block 603 inside the snap-fit ​​groove 602. Then the second compression spring 604 moves backward, and the fixing block 606 exits the snap-fit ​​groove 602, completing the disassembly.

[0037] In one embodiment, the protective component 8 includes a first protective shell 801 disposed on the outer sidewall of the mounting shell 1 near the clamping component 4. The inner wall of the first protective shell 801 is provided with a plurality of limiting grooves 802. A second protective shell 803 is disposed inside the first protective shell 801. A plurality of sliders 804 that cooperate with the limiting grooves 802 are disposed on the outer side of the second protective shell 803, thereby preventing foreign objects from falling into the foreign object cleaning device, improving the service life of the device, and reducing the maintenance cost of the device.

[0038] Working principle of protective component 8: When the driving component 2 drives the clamping component 4 to move forward or backward, the second protective shell 803 will move forward or backward with the clamping component 4, and the limiting groove 802 inside the first protective shell 801 restricts the movement of the slider 804 of the second protective shell 803 to prevent the second protective shell 803 from falling off.

[0039] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0040] In practical applications, when a strip-shaped solid or liquid foreign object or small particle is found during the operation of the steam generator, the handle 203 of the drive assembly initially drives the first end block 202 at the top to move backward. Then, the pull column 201 drives the connecting column 205 and the drive column 401 to move backward and drives the drive plate 402 to move. Under the triangular structure, the driven plate 403 is driven to retract towards the center. With the cooperation of the drive plate 402, the second end block 405, and the driven plate 403, the clamping claw 404 clamps the strip-shaped foreign object. Conversely, when the handle 203 is released, the first compression spring 204 releases its elastic potential energy, pushing the connecting column 205 and the drive column 401 to return to their original position (the working principle of the drive assembly 2 and the clamping assembly 4 is as described above).

[0041] Then, when liquid foreign objects or small particles are generated inside the steam generator, the snap-fit ​​hole 607 on the fixing block 606 of the snap-fit ​​assembly 6 is aligned with the snap-fit ​​block 603 inside the snap-fit ​​groove 602 and snap-fit ​​is completed. The airbag 7 on the disc 14 is fixed on the second fixing disc 5. The receiving hole 10 of the airbag 7 is aligned with the liquid foreign objects or small particles. The clamping claw 404 of the clamping assembly 4 is used to press the airbag 7, so that the outside of the airbag 7 is flattened and the air inside is squeezed out. Then, when the clamping claw 404 of the clamping assembly 4 is released, the negative pressure generated inside the airbag 7 is released, and an adsorption effect is generated, so that the liquid foreign objects or small particles are sucked into the airbag for collection and cleaning. The liquid foreign objects or small particles enter the airbag 7 and the air flows in the pipe. When the air pressure in the pipe is higher than the air pressure inside the airbag 7, the airbag 7 forms a negative pressure due to elastic contraction. The air is forced into the airbag through the air inlet block 11 and the air inlet hole 12, realizing passive self-inflation. After the airbag 7 is cleaned or filled with liquid foreign objects or small particles, the fixing block 606 moves backward according to the trajectory of the snap-fit ​​groove 602, so that the snap-fit ​​hole 607 on the fixing block 606 disengages from the snap-fit ​​block 603 inside the snap-fit ​​groove 602. Then the second compression spring 604 moves backward, and the fixing block 606 exits the snap-fit ​​groove 602 for disassembly and cleaning (the working principle of the snap-fit ​​assembly 6 is as described above).

[0042] Furthermore, when the driving component 2 drives the clamping component 4 to move, the space formed between the driving component 2 and the clamping component 4 is protected by the second protective shell 803 of the protective component, which moves forward or backward with the clamping component 4 to prevent solid foreign objects, liquid foreign objects, or small particles inside the tube from entering the device (the working principle of the protective component 8 is as described above), thereby improving the lifespan of the device and reducing the maintenance of the device.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for cleaning strip-shaped foreign matter between pipes of a steam generator, comprising a mounting shell (1), characterized in that, The mounting housing (1) is provided with a drive assembly (2), which has an L-shaped structure and a first fixing plate (3) is provided on the top of the drive assembly (2); One end of the drive component (2) passes through the first fixed plate (3) and is connected to the clamping component (4). The clamping component (4) is provided with a second fixed plate (5) at the top. The second fixed plate (5) is provided with a locking component (6) at the top. The locking component (6) is provided with an airbag (7) at the top. A protective component (8) is provided between the mounting shell (1) and the clamping assembly (4).

2. The device for cleaning strip-shaped foreign objects between pipes of a steam generator according to claim 1, characterized in that, The first fixed plate (3) and the second fixed plate (5) are connected by a support column (9).

3. The device for cleaning strip-shaped foreign objects between pipes of a steam generator according to claim 1, characterized in that, One end of the airbag (7) is provided with a receiving hole (10); The airbag (7) has an air inlet block (11) on its outer circumference, and the top of the air inlet block (11) has several air inlets (12). The airbag (7) has symmetrically arranged fixing posts (13) on both sides of its bottom, and a disc (14) is arranged at the bottom of the fixing posts (13).

4. A device for cleaning strip-shaped foreign objects between tubes of a steam generator according to claim 1, characterized in that, The drive assembly (2) includes a pull column (201) disposed inside the mounting housing (1). A first end block (202) is symmetrically disposed at one end of the pull column (201). The pull column (201) and the first end block (202) are connected by a pin. A handle (203) is disposed at the bottom of the first end block (202). One end of the bottom of the handle (203) is connected to the mounting housing (1) by a pin. A first compression spring (204) is sleeved on the outer side wall of the other end of the pull column (201), and a connecting column (205) is connected to the top of the pull column (201); The inner side of the mounting housing (1) is provided with annular limiting blocks (206) at both ends of the first compression spring (204).

5. A device for cleaning strip-shaped foreign objects between tubes of a steam generator according to claim 4, characterized in that, The clamping assembly (4) includes a drive column (401) that passes through the first fixed plate (3) at the top of the connecting column (205). A drive plate (402) is provided at the top of the drive column (401). A plurality of driven plates (403) are provided on the outer side of the drive plate (402) in a triangular structure. One end of the driven plate (403) is connected to a clamping claw (404). The top of the first fixing plate (3) is provided with a second end block (405) that cooperates with the bottom of the clamping claw (404).

6. A device for cleaning strip-shaped foreign matter between tubes of a steam generator according to claim 5, characterized in that, The second end block (405) and the driven plate (403) are both bolted to the clamping claw (404).

7. A device for cleaning strip-shaped foreign objects between pipes in a steam generator according to claim 5, characterized in that, The second fixed plate (5) has a movable groove (406) that cooperates with the clamping claw (404).

8. A device for cleaning strip-shaped foreign objects between tubes of a steam generator according to claim 1, characterized in that, The locking assembly (6) includes a locking plate (601) disposed on the top of the second fixing plate (5). The top of the locking plate (601) is provided with three sets of locking slots (602). The locking slots (602) are respectively provided with locking blocks (603) and second compression springs (604) on both sides inside. The top of the second compression springs (604) is provided with a stop block (605). The bottom of the disc (14) is provided with a fixing block (606) that cooperates with the snap-fit ​​groove (602), and the fixing block (606) is provided with a snap-fit ​​hole (607) that cooperates with the snap-fit ​​block (603).

9. A device for cleaning strip-shaped foreign objects between tubes of a steam generator according to claim 1, characterized in that, The protective assembly (8) includes a first protective shell (801) disposed on the outer sidewall of one end of the mounting shell (1) and close to the clamping assembly (4), and the inner wall of the first protective shell (801) is provided with a plurality of limiting grooves (802). The first protective shell (801) is provided with a second protective shell (803) inside, and the second protective shell (803) is provided with a plurality of sliders (804) that cooperate with the limiting groove (802) on the outside.

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