Welding tool for mounting centrifugal pump

Abstract

The invention discloses a centrifugal pump mounting and welding tool, and belongs to the technical field of welding equipment manufacturing, the centrifugal pump mounting and welding tool comprises a workbench, a limiting box is fixedly mounted on the top wall of the workbench, a clamping assembly used for clamping a pump shell is arranged on the limiting box, a water box is mounted on the bottom wall of the workbench, and a water adding assembly is arranged on the water box. According to the scheme, the water box is arranged, water flow located above the piston plate in the water box is squeezed in the upward moving process of the piston plate, then the water flow flows into the pump shell through the first water pipe, welding slag generated in the welding process can be rapidly cooled through clean water stored in the pump shell, the welding slag is prevented from being attached to the inner wall of the pump shell, and the product quality of the pump shell is guaranteed; and meanwhile, clear water stored in the pump shell can provide continuous cooling for the pump shell, the temperature of the edge of the pump shell is prevented from being too high, the positioning rod enters the shell from the lower portion of the workbench, therefore, the positioning rod is prevented from hindering welding, and the effect of improving the welding efficiency is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment manufacturing, and more specifically, to a centrifugal pump installation welding tool. Background Art

[0002] A centrifugal pump is a pump that relies on the centrifugal force generated when the impeller rotates to transport liquid. When the pump impeller rotates, the liquid inside the impeller is thrown towards the edge of the impeller under the action of centrifugal force, and a liquid flow with a certain pressure and speed is formed at the edge of the impeller. After these liquids enter the pump casing, due to the gradually expanding flow channel of the pump casing, the flow rate of the liquid gradually decreases, the pressure gradually increases, and finally it is discharged from the outlet of the pump.

[0003] During the welding process of the pump casing, it is often necessary to weld the opening. However, during the welding process of the opening of the pump casing, a small amount of welding slag falls into the pump casing, making it difficult to effectively clean the welding slag adhering to the inner wall of the pump casing, reducing the product quality of the pump casing; at the same time, after the welding is completed, there are impurities and dirt at the opening of the pump casing. Since the temperature at the opening of the pump casing has not dropped to the temperature at which blanking can be carried out, it is easy to cause harm to the blanking operator, inconvenient for rapid cleaning, and affecting the welding efficiency.

[0004] In response to the above problems, some solutions have also been given in the prior art. For example, the Chinese invention patent with the publication number CN119077208B discloses a welding positioning tool for processing a water pump pump casing. This device uses the clear water stored in the pump casing to quickly cool the welding slag generated during the welding process, preventing it from adhering to the inner wall of the pump casing and ensuring the product quality of the pump casing. At the same time, the clear water stored in the pump casing will also provide continuous cooling to the pump casing, avoiding the temperature at the edge of the pump casing from being too high and causing damage to the limit fence and the clamping push plate, preventing it from affecting the efficiency of fixing the subsequent pump casing; however, in the prior art, when fixing and adding water to the pump casing through the positioning rod at the opening and the water pipe, since the positioning rod passes through the opening of the pump casing, it will cause a certain obstruction to the welding during the welding operation by the welding personnel, thus bringing great inconvenience to the welding personnel and seriously affecting the welding efficiency. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a centrifugal pump installation welding tool, which can achieve the purpose of improving the welding efficiency.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A centrifugal pump installation welding tool, including a workbench, a limit box is fixedly installed on the top wall of the workbench, a clamping assembly for clamping the pump casing is provided on the limit box, a water box is installed on the bottom wall of the workbench, and a water adding assembly is provided on the water box; The water adding component includes a piston plate slidably installed in the water box. An electric push rod with an output end fixedly connected to the piston plate is fixedly installed on the water box. A positioning groove is formed on the limiting box. A positioning rod slidably engaged with the positioning groove is fixedly installed on the top wall of the piston plate. A first water pipe is inserted on the positioning rod, and a temperature reduction component is arranged on the positioning rod.

[0008] Further, the temperature reduction component includes a water cavity formed on the positioning rod. Communication grooves are uniformly formed on the water cavity, and the bottom wall of the communication groove forms a sixty-degree angle with the horizontal plane. A second water pipe communicated with the water cavity is inserted on the piston plate, and a water inlet valve with a downward output end is inserted on the piston plate.

[0009] Further, a filter screen is installed on the inner wall of the water box. An installation ring is rotatably installed on the filter screen, and a scraping plate is fixedly installed on the installation ring. A spiral groove is formed on the positioning rod, and a linkage block slidably engaged with the spiral groove is fixedly installed on the installation ring. A collection component cooperating with the scraping plate is arranged on the water box.

[0010] Further, the collection component includes a collection box detachably installed on the water box. A collection port communicated with the collection box is formed on the water box.

[0011] Further, a plugging plate for plugging the collection port is slidably installed on the workbench. A connecting rod is fixedly installed on the top wall of the plugging plate, and a first spring is jointly installed between the connecting rod and the top wall of the workbench.

[0012] Further, the clamping component includes a first clamping plate fixedly installed on the limiting box. A sliding groove is formed on the limiting box. A mounting rod is slidably installed in the sliding groove. A second spring is jointly installed between the mounting rod and the sliding groove. A second clamping plate is fixedly installed at one end of the mounting rod away from the second spring. A magnet block is embedded on the mounting rod. An electromagnet electrically connected to the electric push rod is embedded on the limiting box, and the electromagnet and the magnet block repel each other.

[0013] Further, the side walls of the first clamping plate and the second clamping plate close to each other are arc-shaped.

[0014] Further, a drain valve is fixedly installed at one end of the first water pipe away from the limiting box.

[0015] Further, an annular plate is fixedly installed on the positioning rod. A telescopic pipe is fixedly installed on the bottom wall of the annular plate, and the telescopic pipe is rotatably matched with the installation ring.

[0016] Further, the top wall of the filter screen is an inclined surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this solution, by setting up a water box, during the upward movement of the piston plate, the water flow above the piston plate in the water box is squeezed, and then the water flow flows through the first water pipe into the pump housing. The clear water stored in the pump housing will quickly cool the welding slag generated during the welding process, preventing it from adhering to the inner wall of the pump housing, ensuring the product quality of the pump housing. At the same time, the clear water stored in the pump housing will also provide continuous cooling to the pump housing, preventing the temperature at the edge of the pump housing from being too high. And by allowing the positioning rod to enter the housing from below the workbench, it avoids the positioning rod from obstructing the welding, thus playing a role in improving the welding efficiency. (2) In this solution, by opening a water cavity, during the downward movement of the piston plate, the water flow below the piston plate in the water box flows through the second water pipe into the water cavity and is sprayed towards the welding interface through the communication grooves on the water cavity, enabling the temperature at the opening of the pump housing to quickly decrease. There is no need for the user to spend a long time waiting for the pump housing to cool. At the same time, by spraying water flow on the inner wall of the pump housing for cooling, it can prevent the water flow from splashing everywhere, saving the user a long time for cleaning stains, and further improving the welding efficiency. (3) In this solution, by setting up a filter screen, when the water flow drives the welding slag into the water box, the filter screen can block the welding slag. At the same time, during the up and down movement of the positioning rod, the spiral groove, linkage block, and mounting ring drive the scraper to rotate and clean the welding slag on the filter screen. Then the welding slag will enter the collection box through the collection port, eliminating the need for the user to stop welding to clean the welding slag on the filter screen. At the same time, it is also convenient for the user to centrally process the welding slag, further improving the welding efficiency. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 is an enlarged view of part A in; Figure 4 For the present invention Figure 2 is an enlarged view of part B in; Figure 5 is a cross-sectional view of the positioning rod of the present invention; Figure 6 For the present invention Figure 5 is an enlarged view of part C in; Figure 7 is a combined view of the connecting rod and the plugging plate of the present invention; Figure 8 is a combined view of the mounting ring and the linkage block of the present invention.

[0019] Explanation of the reference numerals in the drawings: 1. Workbench; 2. Limit box; 3. Water adding component; 301. Piston plate; 302. Electric push rod; 303. Positioning groove; 304. Positioning rod; 305. First water pipe; 4. Cooling component; 401. Water cavity; 402. Connecting groove; 403. Second water pipe; 404. Water inlet valve; 501. Filter screen; 502. Installation ring; 503. Scraper; 504. Spiral groove; 505. Linking block; 6. Collection component; 601. Collection box; 602. Collection port; 603. Sealing plate; 604. Connecting rod; 605. First spring; 7. Clamping component; 701. First clamping plate; 702. Installation rod; 703. Second spring; 704. Second clamping plate; 705. Magnet block; 706. Electromagnet; 8. Drain valve; 9. Annular plate; 10. Telescopic pipe; 11. Water box. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figures 1 to 8 , a centrifugal pump installation and welding tool, including a workbench 1, a limit box 2 is fixedly installed on the top wall of the workbench 1, a clamping component 7 for clamping the pump casing is provided on the limit box 2, a water box 11 is installed on the bottom wall of the workbench 1, and a water adding component 3 is provided on the water box 11; The water adding component 3 includes a piston plate 301 slidably installed in the water box 11, an electric push rod 302 with an output end fixedly connected to the piston plate 301 is fixedly installed on the water box 11, a positioning groove 303 is opened on the limit box 2, a positioning rod 304 slidably matched with the positioning groove 303 is fixedly installed on the top wall of the piston plate 301, a first water pipe 305 is inserted on the positioning rod 304, and a cooling component 4 is provided on the positioning rod 304.

[0022] The cooling component 4 includes a water cavity 401 opened on the positioning rod 304, connecting grooves 402 are uniformly opened on the water cavity 401, and the bottom wall of the connecting groove 402 forms an angle of sixty degrees with the horizontal plane. A second water pipe 403 communicated with the water cavity 401 is inserted on the piston plate 301, and a water inlet valve 404 with an output end downward is inserted on the piston plate 301.

[0023] During use, place the pump housing in the limit box 2, then start the electric push rod 302. At the same time, the clamping assembly 7 can clamp and fix the pump housing. During the extension of the output end of the electric push rod 302, the piston plate 301 is driven to move upward. During the upward movement of the piston plate 301, the positioning rod 304 is driven to pass through the positioning groove 303 and enter the pump housing. At the same time, during the upward movement of the piston plate 301, the water flow above the piston plate 301 in the water box 11 is squeezed, and then the water flow flows into the pump housing through the first water pipe 305. The clear water stored in the pump housing can quickly cool the welding slag generated during the welding process, preventing it from adhering to the inner wall of the pump housing and ensuring the product quality of the pump housing. At the same time, the clear water stored in the pump housing can also continuously cool the pump housing, preventing the temperature at the edge of the pump housing from being too high. And by making the positioning rod 304 enter the shell from below the workbench 1, the positioning rod 304 is prevented from obstructing the welding, which improves the welding efficiency.

[0024] During the upward movement of the piston plate 301, the space below the piston plate 301 in the water box 11 sucks in water flow through the water inlet valve 404. Then, after the welding is completed, the output end of the electric push rod 302 contracts and drives the piston plate 301 to move downward. During the downward movement of the piston plate 301, the water flow below the piston plate 301 in the water box 11 flows into the water cavity 401 through the second water pipe 403 and is sprayed towards the welding interface through the communication groove 402 on the water cavity 401, enabling the temperature at the opening of the pump housing to quickly decrease. There is no need for the user to wait for a long time for the pump housing to cool. At the same time, by spraying water flow on the inner wall of the pump housing for cooling, it can be avoided that the water flow splashes everywhere, resulting in the user spending a long time cleaning the stains, further improving the welding efficiency.

[0025] During the process of the output end of the electric push rod 302 driving the piston plate 301 to move downward, the piston plate 301 drives the positioning rod 304 to move downward. Then, when the positioning rod 304 enters the water box 11, the water flow in the pump housing drives the welding slag to move into the water box 11 together, so that there is no need for the user to spend a long time cleaning the welding slag in the pump housing, further improving the welding efficiency.

[0026] As Figure 2 、 Figure 4 shown, a filter screen 501 is installed on the inner wall of the water box 11. An installation ring 502 is rotatably installed on the filter screen 501, and a scraper 503 is fixedly installed on the installation ring 502. A spiral groove 504 is formed on the positioning rod 304, and a linkage block 505 that is slidably matched with the spiral groove 504 is fixedly installed on the installation ring 502. A collection assembly 6 that cooperates with the scraper 503 is provided on the water box 11.

[0027] The collection component 6 includes a collection box 601 detachably mounted on the water box 11, and a collection port 602 communicating with the collection box 601 is formed on the water box 11.

[0028] A plugging plate 603 for plugging the collection port 602 is slidably mounted on the upper portion of the workbench 1. A connecting rod 604 is fixedly mounted on the top wall of the plugging plate 603, and a first spring 605 is commonly mounted between the connecting rod 604 and the top wall of the workbench 1.

[0029] By adopting the above technical solution, after the water flow drives the welding slag into the water box 11, the filter screen 501 can block the welding slag, thereby preventing the welding slag from flowing into the pump housing along with the water flow. Then, during the up-and-down reciprocating movement of the positioning rod 304, the spiral groove 504 is driven to move up and down. Since the linkage block 505 is in sliding fit with the spiral groove 504, the linkage block 505 is driven to rotate during the movement of the spiral groove 504. Then, during the rotation of the linkage block 505, the scraping plate 503 is driven to rotate along the top wall of the filter screen 501 through the mounting ring 502. During the rotation of the scraping plate 503, the welding slag on the top wall of the filter screen 501 can be cleaned, and the blockage of the filter screen 501 is prevented, that is, the user does not need to stop welding to clean the welding slag on the filter screen 501, further improving the welding efficiency.

[0030] During the process of the scraping plate 503 driving the welding slag on the top wall of the filter screen 501 to rotate, the welding slag moves into the collection box 601 through the collection port 602 under the action of centrifugal force, thereby preventing the welding slag from adhering to the top wall of the filter screen 501 again and causing blockage of the filter screen 501. At the same time, it is also convenient for the user to centrally process the welding slag, further improving the welding efficiency.

[0031] When it is necessary to clean the welding slag in the collection box 601, the user can first push the connecting rod 604 downward. At this time, the first spring 605 is compressed and has a tendency to recover. At the same time, the connecting rod 604 drives the plugging plate 603 to move downward to plug the collection port 602. Then, the user can replace the new collection box 601. After the replacement of the collection box 601 is completed, the user releases the connecting rod 604. At this time, the first spring 605 extends and drives the plugging plate 603 to disengage from the collection port 602 through the connecting rod 604, that is, the user can process the welding slag in the collection box 601 without stopping welding, further improving the welding efficiency.

[0032] Such as Figure 2 、 Figure 3As shown, the clamping assembly 7 includes a first clamping plate 701 fixedly mounted on the limit box 2, a slide groove is provided on the limit box 2, a mounting rod 702 is slidably mounted in the slide groove, a second spring 703 is installed between the mounting rod 702 and the slide groove, a second clamping plate 704 is fixedly mounted on one end of the mounting rod 702 away from the second spring 703, a magnet block 705 is embedded on the mounting rod 702, an electromagnet 706 electrically connected to the electric push rod 302 is embedded on the limit box 2, and the electromagnet 706 and the magnet block 705 repel each other.

[0033] The side wall of the first clamping plate 701 and the second clamping plate 704 that are close to each other is arc-shaped.

[0034] By adopting the above technical solution, when the electric push rod is started, the electromagnet 706 is energized and generates an electromagnetic field. Then, under the action of the electromagnetic field, the magnet block 705 drives the mounting rod 702 to move along the slide groove. In the process of the movement of the mounting rod 702, the second clamping plate 704 is driven to move. In the process of the movement of the second clamping plate 704, the pump casing is driven to approach the first clamping plate 701. Then, under the joint action of the first clamping plate 701 and the second clamping plate 704, the pump casing is clamped and fixed. At the same time, the pump casing can be straightened and the holes on the bottom wall of the pump casing can be aligned with the positioning groove 303. There is no need for the user to manually straighten the pump casing, and the movement of the pump casing during welding can be avoided, thereby further improving the welding efficiency.

[0035] In the process of the second clamping plate 704 and the first clamping plate 701 jointly clamping the pump casing, since the side wall of the first clamping plate 701 and the second clamping plate 704 close to each other is arc-shaped, then under the action of the arc surface of the first clamping plate 701 and the second clamping plate 704, the outer wall of the pump casing will fit with the arc surface, thereby ensuring that the hole on the pump casing is aligned with the positioning groove 303.

[0036] like Figure 5 As shown, a drain valve 8 is fixedly installed at one end of the first water pipe 305 away from the limit box 2 .

[0037] By adopting the above technical solution, during the downward movement of the piston plate 301, the pressure in the space above the piston plate 301 in the water box 11 decreases. By setting the drain valve 8, it is possible to prevent the space above the piston plate 301 in the water box 11 from sucking in water containing welding slag from the pump casing through the first water pipe 305.

[0038] like Figure 2 , Figure 4 As shown, an annular plate 9 is fixedly mounted on the positioning rod 304 , a telescopic tube 10 is fixedly mounted on the bottom wall of the annular plate 9 , and the telescopic tube 10 is rotatably matched with the mounting ring 502 .

[0039] By adopting the above technical solution, during the process of the positioning rod 304 driving the annular plate 9 to move up and down, the annular plate 9 drives the telescopic pipe 10 to expand and contract back and forth. And during the process of the telescopic pipe 10 expanding and contracting back and forth, the spiral groove 504 can be isolated from the welding slag, thereby preventing the welding slag from entering the spiral groove 504 and affecting the normal rotation of the spiral groove 504 to drive the linkage block 505.

[0040] As Figure 2 , Figure 4 shown, the top wall of the filter screen 501 is an inclined surface.

[0041] By adopting the above technical solution, by making the top wall of the filter screen 501 an inclined surface, the welding slag on the top wall of the filter screen 501 can quickly move towards the edge of the filter screen 501, so that the edge welding slag enters the collection box 601 through the collection port 602, which plays a role in improving the cleaning efficiency of the welding slag.

[0042] Usage method: When in use, place the pump housing in the limit box 2, then start the electric push rod 302. At the same time, the clamping assembly 7 can clamp and fix the pump housing. During the extension of the output end of the electric push rod 302, the piston plate 301 is driven to move upward. During the upward movement of the piston plate 301, the positioning rod 304 is driven to pass through the positioning groove 303 and enter the pump housing. At the same time, during the upward movement of the piston plate 301, the water flow above the piston plate 301 in the water box 11 is squeezed, and then the water flow flows into the pump housing through the first water pipe 305; during the upward movement of the piston plate 301, the space below the piston plate 301 in the water box 11 sucks in water flow through the water inlet valve 404. Then, after welding is completed, the output end of the electric push rod 302 contracts and drives the piston plate 301 to move downward. During the downward movement of the piston plate 301, the water flow below the piston plate 301 in the water box 11 flows into the water cavity 401 through the second water pipe 403 and is sprayed towards the welding joint through the communication groove 402 on the water cavity 401; after the water flow drives the welding slag into the water box 11, the filter screen 501 can block the welding slag, thereby preventing the welding slag from flowing into the pump housing along with the water flow. Then, during the reciprocating up and down movement of the positioning rod 304, the spiral groove 504 is driven to reciprocate up and down. Since the linkage block 505 is in sliding fit with the spiral groove 504, during the movement of the spiral groove 504, the linkage block 505 is driven to rotate. Then, during the rotation of the linkage block 505, the scraping plate 503 is driven to rotate along the top wall of the filter screen 501 through the mounting ring 502. During the rotation of the scraping plate 503, the welding slag on the top wall of the filter screen 501 can be cleaned; during the process of the scraping plate 503 driving the welding slag on the top wall of the filter screen 501 to rotate, the welding slag moves into the collection box 601 through the collection port 602 under the action of centrifugal force; when it is necessary to clean the welding slag in the collection box 601, the user can first push the connecting rod 604 downward. At this time, the first spring 605 is compressed and has a tendency to recover. At the same time, the connecting rod 604 drives the blocking plate 603 to move downward to block the collection port 602. Then, the user can replace the new collection box 601. After the replacement of the collection box 601 is completed, the user releases the connecting rod 604. At this time, the first spring 605 extends and drives the blocking plate 603 to disengage from the collection port 602 through the connecting rod 604, that is, the user can process the welding slag in the collection box 601 without stopping welding; when the electric push rod is started, the electromagnet 706 is energized to generate an electromagnetic field. Then, under the action of the electromagnetic field, the magnet block 705 drives the mounting rod 702 to move along the chute. During the movement of the mounting rod 702, the second clamping plate 704 is driven to move. During the movement of the second clamping plate 704, the pump housing is driven to approach the first clamping plate 701. Then, under the combined action of the first clamping plate 701 and the second clamping plate 704, the pump housing is clamped and fixed, and at the same time, the pump housing can be straightened, and the hole at the bottom wall of the pump housing is aligned with the positioning groove 303.

[0043] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A centrifugal pump installation welding tool, comprising a workbench (1), a limit box (2) being fixedly mounted on the top wall of the workbench (1), characterized in that: The limit box (2) is provided with a clamping assembly (7) for clamping the pump housing, a water box (11) is installed on the bottom wall of the workbench (1), and a water adding assembly (3) is provided on the water box (11); The water adding assembly (3) comprises a piston plate (301) slidably mounted in a water box (11); an electric push rod (302) whose output end is fixedly connected to the piston plate (301) is fixedly mounted on the water box (11); a positioning groove (303) is provided on the limit box (2); a positioning rod (304) slidably engaged with the positioning groove (303) is fixedly mounted on the top wall of the piston plate (301); a first water pipe (305) is inserted into the positioning rod (304); and a cooling assembly (4) is provided on the positioning rod (304).

2. A centrifugal pump installation welding tool according to claim 1, characterized in that: The cooling component (4) comprises a water cavity (401) formed on a positioning rod (304), the water cavity (401) being evenly provided with connecting grooves (402), and the bottom wall of the connecting grooves (402) being at an angle of sixty degrees to a horizontal plane, the piston plate (301) being provided with a second water pipe (403) connected to the water cavity (401), and the piston plate (301) being provided with a water inlet valve (404) with an output end facing downward.

3. A centrifugal pump installation welding tool according to claim 2, characterized in that: A filter screen (501) is mounted on the inner wall of the water box (11); a mounting ring (502) is rotatably mounted on the filter screen (501); a scraper (503) is fixedly mounted on the mounting ring (502); a spiral groove (504) is formed on the positioning rod (304); a linkage block (505) slidably engaged with the spiral groove (504) is fixedly mounted on the mounting ring (502); and a collecting assembly (6) engaged with the scraper (503) is provided on the water box (11).

4. A centrifugal pump installation welding tool according to claim 3, characterized in that: The collecting assembly (6) comprises a collecting box (601) detachably mounted on the water box (11); the water box (11) is provided with a collecting port (602) which is in communication with the collecting box (601).

5. A centrifugal pump installation welding tool according to claim 4, characterized in that: A blocking plate (603) for blocking the collecting port (602) is slidably mounted on the upper portion of the workbench (1); a connecting rod (604) is fixedly mounted on the top wall of the blocking plate (603); and a first spring (605) is mounted between the connecting rod (604) and the top wall of the workbench (1).

6. A centrifugal pump installation welding tool according to claim 1, characterized in that: The clamping assembly (7) comprises a first clamping plate (701) fixedly mounted on the limit box (2); a slide groove is provided on the limit box (2); a mounting rod (702) is slidably mounted in the slide groove; a second spring (703) is installed between the mounting rod (702) and the slide groove; a second clamping plate (704) is fixedly mounted on one end of the mounting rod (702) away from the second spring (703); a magnet block (705) is embedded on the mounting rod (702); an electromagnet (706) electrically connected to the electric push rod (302) is embedded on the limit box (2); and the electromagnet (706) and the magnet block (705) repel each other.

7. A centrifugal pump installation welding tool according to claim 6, characterized in that: The side wall of the first clamping plate (701) and the second clamping plate (704) on the side close to each other is arc-shaped.

8. A centrifugal pump installation welding tool according to claim 1, characterized in that: A drainage valve (8) is fixedly mounted on one end of the first water pipe (305) away from the limit box (2).

9. A centrifugal pump installation welding tool according to claim 1, characterized in that: An annular plate (9) is fixedly mounted on the positioning rod (304), a telescopic tube (10) is fixedly mounted on the bottom wall of the annular plate (9), and the telescopic tube (10) is rotatably matched with the mounting ring (502).

10. A centrifugal pump installation welding tool according to claim 3, characterized in that: The top wall of the filter screen (501) is an inclined surface.

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