Impeller of double-suction centrifugal pump and double-suction centrifugal pump

Abstract

The invention discloses an impeller of a double-suction centrifugal pump and the double-suction centrifugal pump, and relates to the technical field of centrifugal pumps. The centrifugal pump comprises a centrifugal pump pipeline and an impeller shell, the impeller shell is fixedly arranged on the upper portion of the centrifugal pump pipeline, a water inlet flange is arranged at one end of the centrifugal pump pipeline, and a water outlet flange is arranged at the other end of the centrifugal pump pipeline. According to the device, through the arranged filtering mechanism, under the action of a filtering disc, a blade, a scraping plate and a rubber scraping strip in the filtering mechanism, the filtering disc filters entering water flow, impurities and impurities are prevented from entering, rotation of the blade enables the scraping plate and the rubber scraping strip to rotate synchronously, and the impurities and the attached impurities on one side of the filtering disc are cleaned; according to the double-suction centrifugal pump, the filtering holes of the filtering disc are prevented from being blocked, normal operation of water flow filtering operation is guaranteed, and therefore continuous filtering during water inflow of the double-suction centrifugal pump is conveniently achieved, parts in the double-suction centrifugal pump are prevented from being damaged, and the service life of the double-suction centrifugal pump is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal pumps, in particular to an impeller of a double-suction centrifugal pump and a double-suction centrifugal pump. Background Art

[0002] Double-suction centrifugal pump is a centrifugal pump with two suction ports and two discharge ports. Its unique design can balance radial and axial forces, improving pump stability and efficiency. However, the double-suction centrifugal pump in the prior art still has some defects: 1. When the double-suction centrifugal pump in the prior art sucks in water, the water is accompanied by certain debris and impurities. If these impurities directly enter the centrifugal pump, it is easy to damage the structural components of the centrifugal pump, thereby affecting the service life of the centrifugal pump. 2. The impeller of a double-suction centrifugal pump is usually fixed on the rotating shaft of the coupling. When performing maintenance on the centrifugal pump impeller, when removing the centrifugal pump impeller casing, it is often necessary to remove multiple bolts between the impeller and the rotating shaft, which makes the removal of the centrifugal pump impeller inconvenient and the maintenance of the centrifugal pump impeller more troublesome. In view of the above problems, the inventors propose an impeller of a double-suction centrifugal pump and a double-suction centrifugal pump for solving the above problems. Summary of the Invention

[0003] In order to solve the above problems, the object of the present invention is to provide an impeller for a double-suction centrifugal pump and a double-suction centrifugal pump.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a double-suction centrifugal pump, comprising a centrifugal pump pipeline and an impeller housing, the impeller housing is fixedly arranged on the upper part of the centrifugal pump pipeline, one end of the centrifugal pump pipeline is provided with an inlet flange, the other end of the centrifugal pump pipeline is provided with an outlet flange, a filtering mechanism is provided at a position of the centrifugal pump pipeline near the water inlet flange, and a disassembly and assembly component is provided between the filtering mechanism and the centrifugal pump pipeline.

[0005] Preferably, the filtering mechanism includes an equipment sleeve, which is detachably mounted on the inner wall of a centrifugal pump pipe. A rotating shaft is rotatably provided in the equipment sleeve, one end of the rotating shaft is fixedly provided with a plurality of blades distributed in a ring array, the other end of the rotating shaft is fixedly provided with a rotating seat, a plurality of scrapers distributed in a ring array are fixedly provided on the outer wall of the rotating seat, a rubber scraper is fixedly provided on one side of the scraper, a filter disc is detachably mounted on the inner wall of one end of the equipment sleeve, and one side of the rubber scraper is in movable contact with one side of the filter disc.

[0006] Preferably, two fixing rods are fixedly provided at one end of the equipment sleeve, a fixing seat is fixedly provided between the two fixing rods, and one end of the rotating shaft is rotatably connected to one end of the fixing seat.

[0007] Preferably, the disassembly and assembly component includes a locking screw and a limit ring, two locking screws are provided, the locking screws are threadedly installed on the centrifugal pump pipeline, two threaded holes are provided on the outer wall of one end of the equipment sleeve, one end of the locking screw is threadedly connected to the inner wall of the threaded hole, the limit ring is movably provided on the inner wall of one end of the equipment sleeve, and two limit seats are slidably provided on the inner wall of one end of the equipment sleeve, and one side of the limit seat is movably contacted with one side of the limit ring.

[0008] Preferably, a sealing ring is fixedly provided on the other side of the limit stop ring, and one side of the sealing ring is in movably contact with the other side of the filter disc.

[0009] Preferably, two movable grooves are provided on the inner wall at one end of the equipment sleeve, the limit seat is slidably provided at one end of the movable groove, a pull rod is movably inserted inside the movable groove, one end of the pull rod is fixedly connected to one end of the limit seat, and an external movable sleeve of the pull rod is provided with a spring, one end of the spring is fixedly connected to the inner wall of the movable groove, and the other end of the spring is fixedly connected to one end of the limit seat.

[0010] Preferably, a pulling handle is fixedly provided at the other end of the pull rod, two No. 2 guide grooves are provided on the side walls of the movable groove, and No. 2 guide blocks are fixedly provided on both sides of the limit seat, and the No. 2 guide blocks are slidably provided on the inner wall of the No. 2 guide groove.

[0011] An impeller of a double-suction centrifugal pump includes an impeller component, which includes an impeller body, a fixed shaft and a rotating shaft. The impeller body is fixedly arranged in the middle of the fixed shaft. Two rotating shafts are provided. The fixed shaft is detachably installed between the two rotating shafts. An assembly component is provided between the fixed shaft and the rotating shaft.

[0012] Preferably, the assembly component includes two square blocks, the two square blocks are symmetrically arranged at the ends of the fixed shaft, one end of each of the two rotating shafts is provided with a square groove, and the square blocks are in movable contact with the inner wall of the square groove; Both ends of the fixed shaft are provided with a cavity, and one end of the two cavities is slidably provided with a movable disk, one of the square blocks is fixedly provided on one side of the movable disk, and a notch is provided on the peripheral wall of the cavity, and a movable seat is slidably provided in the notch, and one side of the movable seat is fixedly connected to the outer wall of the movable disk, and a threaded rod is rotatably installed in the notch, and the threaded rod passes through the movable seat and is threadedly rotatably connected to the movable seat.

[0013] Preferably, a hexagonal seat is fixedly provided at one end of the threaded rod, two No. 1 guide grooves are provided on the side walls of the slot, and a No. 1 guide block is fixedly provided on both sides of the movable seat, and the No. 1 guide block is slidably provided on the inner wall of the No. 1 guide groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing an assembly component, the square block and the square groove in the assembly component cooperate to conveniently fix the blade body to the end of the rotating shaft. At the same time, when the square block is separated from the square groove, the blade body at the end of the rotating shaft can be disassembled, thereby conveniently realizing the disassembly of the impeller body, thereby effectively improving the convenience of the maintenance operation of the impeller body; 2. In the present invention, through the filter mechanism provided, the filter disc, blades, scrapers and rubber scrapers in the filter mechanism function to filter the incoming water flow to prevent debris and impurities from entering. The rotation of the blades can cause the scrapers and rubber scrapers to rotate synchronously to clean the debris and attached impurities on one side of the filter disc, thus preventing the filter holes of the filter disc from being blocked and ensuring the normal operation of the water flow filtration operation. This conveniently realizes continuous filtration when the double-suction centrifugal pump is inlet, avoids damage to the components in the double-suction centrifugal pump, and thus increases the service life of the double-suction centrifugal pump. 3. In the present invention, by providing a disassembly and assembly component, the equipment sleeve can be disassembled by cooperating with the locking screw and the threaded hole. At the same time, the filter disc at one end of the equipment sleeve can be disassembled by contacting the limit seat and the limit ring to limit the filter disc, thereby conveniently realizing the overall disassembly of the filter mechanism, thereby improving the convenience of maintenance or replacement of the filter mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 The figure is a schematic structural diagram of a double-suction centrifugal pump of the present invention.

[0017] Figure 2 This is a schematic diagram of the cross-section of the centrifugal pump pipeline and the separation structure of the locking screw and the equipment sleeve of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the filtering mechanism of the present invention.

[0019] Figure 4 It is a schematic diagram of the cross-section structure of the sleeve of the device of the present invention.

[0020] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of part B in FIG.

[0021] Figure 6 It is a schematic diagram of the separation structure of the filter disc, rubber scraper, sealing ring and limit ring of the present invention.

[0022] Figure 7 The figure is a schematic structural diagram of an impeller of a double-suction centrifugal pump according to the present invention.

[0023] Figure 8 It is a schematic diagram of the separation structure of the fixed shaft and the rotating shaft of the present invention.

[0024] Figure 9 It is a schematic structural diagram of the cross section and assembly components of the fixed shaft of the present invention.

[0025] Figure 10 For the present invention Figure 9 A magnified schematic diagram of part A in FIG.

[0026] Figure: 1. Impeller; 11. Impeller body; 12. Fixed shaft; 13. Rotating shaft; 2. Assembly component; 21. Square block; 22. Square groove; 23. Cavity; 24. Movable plate; 25. Notch; 26. Moving seat; 27. Threaded rod; 28. Hexagonal seat; 29. ​​No. 1 guide groove; 291. No. 1 guide block; 3. Centrifugal pump pipe; 31. Inlet flange; 32. Outlet flange; 4. Impeller housing; 5. Filter mechanism ;51. Equipment sleeve;52. Rotating shaft;53. Blade;54. Fixed rod;55. Fixed seat;56. Rotating seat;57. Scraper;58. Rubber scraper;59. Filter plate;6. Disassembly and assembly components;61. Locking screw;62. Threaded hole;63. Limiting ring;64. Sealing ring;65. Movable groove;66. Limiting seat;67. Pull rod;68. Spring;69. Pull handle;7. Guide groove No. 2;71. Guide block No. 2. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Figure 1-10As shown, the present invention provides a double-suction centrifugal pump, including a centrifugal pump pipeline 3 and an impeller casing 4, the impeller casing 4 is fixedly arranged on the upper part of the centrifugal pump pipeline 3, one end of the centrifugal pump pipeline 3 is provided with a water inlet flange 31, and the other end of the centrifugal pump pipeline 3 is provided with a water outlet flange 32, and a filtering mechanism 5 is provided at a position of the centrifugal pump pipeline 3 near the water inlet flange 31. By providing the filtering mechanism 5, the filtering mechanism 5 can filter the water entering the centrifugal pump pipeline 3, prevent debris from entering the impeller casing 4 and contacting the impeller in the impeller casing 4, reduce the maintenance frequency of the impeller, and increase the service life of the impeller, and a disassembly and assembly component 6 is provided between the filtering mechanism 5 and the centrifugal pump pipeline 3. By providing the disassembly and assembly component 6, the disassembly and assembly component 6 makes it easy for operators to disassemble the filtering mechanism 5 for maintenance or replacement.

[0029] The filtering mechanism 5 includes a device sleeve 51, which is detachably mounted on the inner wall of the centrifugal pump pipe 3. A rotating shaft 52 is provided in the device sleeve 51 for rotation. One end of the rotating shaft 52 is fixedly provided with a plurality of blades 53 distributed in an annular array. By arranging the rotating shaft 52 and the blades 53, when water enters the centrifugal pump pipe 3 through the water inlet flange 31, the water flow can cause the blades 53 to rotate, thereby causing the rotating shaft 52 to rotate. A rotating seat 56 is fixedly provided on the other end of the rotating shaft 52. A plurality of scrapers 57 distributed in an annular array are fixedly provided on the outer wall of the rotating seat 56. One side of the scraper 57 is fixedly provided with The rubber scraper 58 and the filter disc 59 are detachably mounted on the inner wall of one end of the equipment sleeve 51. One side of the rubber scraper 58 is in movable contact with one side of the filter disc 59. By setting the filter disc 59, the filter disc 59 can filter the incoming water flow. By setting the scraper 57 and the rubber scraper 58, when the rotating shaft 52 rotates, the rotating shaft 52 can make the scraper 57 and the rubber scraper 58 revolve in a circle through the rotating seat 56. The scraper 57 and the rubber scraper 58 can scrape off the debris and attached impurities on one side of the filter disc 59 to avoid the filter holes of the filter disc 59 from being blocked, thereby ensuring the normal progress of the water flow filtration operation.

[0030] Two fixing rods 54 are fixedly provided at one end of the equipment sleeve 51, and a fixing seat 55 is fixedly provided between the two fixing rods 54. One end of the rotating shaft 52 and one end of the fixing seat 55 are rotatably connected. By setting the fixing rod 54 and the fixing seat 55, the fixing rod 54 and the fixing seat 55 can support the rotating shaft 52.

[0031] The disassembly assembly 6 includes a locking screw 61 and a limit ring 63. Two locking screws 61 are provided. The locking screws 61 are threadedly installed on the centrifugal pump pipeline 3. Two threaded holes 62 are provided on the outer wall of one end of the equipment sleeve 51. One end of the locking screw 61 is threadedly connected to the inner wall of the threaded hole 62. By providing the locking screw 61 and the threaded hole 62, the threaded cooperation of the locking screw 61 and the threaded hole 62 can fix the equipment sleeve 51 on the inner wall of the centrifugal pump pipeline 3. The reverse operation can be used to disassemble the equipment sleeve 51, so that the filter mechanism 5 is separated from the centrifugal pump pipeline 3 as a whole. The limit ring 63 is movably provided on the equipment On the inner wall of one end of the sleeve 51, two limit seats 66 are slidably provided on the inner wall of one end of the equipment sleeve 51, one side of the limit seat 66 is in movable contact with one side of the limit ring 63, and the other side of the limit ring 63 is fixedly provided with a sealing ring 64, one side of the sealing ring 64 is in movably contact with the other side of the filter disc 59. By setting the limit ring 63, the sealing ring 64 and the limit seat 66, the limit ring 63 and the limit seat 66 can limit the filter disc 59 so that the filter disc 59 is fixed between the sealing ring 64 and the rubber scraper 58. The sealing ring 64 can improve the sealing between the limit ring 63 and the filter disc 59 to prevent water from overflowing.

[0032] Two movable grooves 65 are provided on the inner wall of one end of the equipment sleeve 51, and the limit seat 66 is slidably provided at one end of the movable groove 65. A pull rod 67 is movably inserted into the inside of the movable groove 65, and one end of the pull rod 67 is fixedly connected to one end of the limit seat 66. The outer movable sleeve of the pull rod 67 is provided with a spring 68, and one end of the spring 68 is fixedly connected to the inner wall of the movable groove 65, and the other end of the spring 68 is fixedly connected to one end of the limit seat 66. By setting the pull rod 67 and the spring 68, when the pull rod 67 is pulled upward, the pull rod 67 can make the limit seat 66 move vertically into the movable groove 65, and the spring 68 contracts to release the limit of the limit ring 63, so that the limit ring 63 and the sealing ring 64 can be separated from the equipment sleeve 51, and then the filter disc 59 can be disassembled.

[0033] A pulling handle 69 is fixedly provided at the other end of the pull rod 67. By setting the pulling handle 69, it is convenient for the operator to pull the pull rod 67. Two No. 2 guide grooves 7 are provided on the side walls of the movable groove 65. No. 2 guide blocks 71 are fixedly provided on both sides of the limit seat 66. The No. 2 guide block 71 is slidably provided on the inner wall of the No. 2 guide groove 7. By setting the No. 2 guide groove 7 and the No. 2 guide block 71, the No. 2 guide block 71 can slide in the vertical direction along the inner wall of the No. 2 guide groove 7, thereby ensuring that the limit seat 66 maintains the vertical lifting.

[0034] The present invention also provides an impeller of a double-suction centrifugal pump, including an impeller component 1, the impeller component 1 including an impeller body 11, a fixed shaft 12 and a rotating shaft 13, the impeller body 11 is fixedly arranged in the middle of the fixed shaft 12, two rotating shafts 13 are provided, the fixed shaft 12 is detachably installed between the two rotating shafts 13, and an assembly component 2 is provided between the fixed shaft 12 and the rotating shaft 13. By providing the assembly component 2, the impeller body 11 and the fixed shaft 12 can be conveniently fixed between the two rotating shafts 13, so that the installation and disassembly of the impeller body 11 can be conveniently realized, and the maintenance work on the impeller body 11 is facilitated.

[0035] The assembly component 2 includes two square blocks 21, which are symmetrically arranged at the ends of the fixed shaft 12. One end of each of the two rotating shafts 13 is provided with a square groove 22. The square blocks 21 and the inner walls of the square grooves 22 are in movable contact. By arranging the square blocks 21 and the square grooves 22, when the square blocks 21 are horizontally inserted into the interior of the square grooves 22, the fixed shaft 12 can be fixed to the end of the rotating shaft 13. When the rotating shaft 13 rotates, the rotating shaft 13 can rotate the impeller body 11 through the fixed shaft 12. Both ends of the fixed shaft 12 are provided with a cavity 23, and one end of the two cavities 23 is slidably provided with a movable disk 24, wherein one square block 21 is fixedly provided on one side of the movable disk 24. By setting the cavity 23 and the movable disk 24, the movable disk 24 can slide into the cavity 23, so that the square block 21 moves into the cavity 23 and disengages from the square groove 22. A notch 25 is provided on the peripheral wall of the cavity 23, and a movable seat 26 is slidably provided in the notch 25. One side of the movable seat 26 is fixedly connected to the outer wall of the movable disk 24, and a threaded rod 27 is rotatably installed in the notch 25. The threaded rod 27 passes through the movable seat 26 and is threadedly rotatably connected to the movable seat 26. By rotating the threaded rod 27, the threaded rod 27 can drive the movable seat 26 to move horizontally in the notch 25, and the movable seat 26 can make the movable disk 24 move synchronously horizontally.

[0036] A hexagonal seat 28 is fixedly provided at one end of the threaded rod 27. The hexagonal seat 28 makes it easy for the operator to rotate the threaded rod 27. Two No. 1 guide grooves 29 are provided on the side walls of the slot 25. A No. 1 guide block 291 is fixedly provided on both sides of the movable seat 26. The No. 1 guide block 291 is slidably provided on the inner wall of the No. 1 guide groove 29. By providing the No. 1 guide groove 29 and the No. 1 guide block 291, the No. 1 guide block 291 can slide horizontally along the inner wall of the No. 1 guide groove 29. The No. 1 guide block 291 can guide the movable seat 26 horizontally, so that the movable seat 26 can maintain horizontal movement in the slot 25.

[0037] Working principle: When the impeller body 11 needs to be maintained, the operator rotates the two hexagonal seats 28 respectively to rotate the two threaded rods 27. The threaded rods 27 drive the movable seat 26 to move horizontally. The movable seat 26 moves the movable disk 24 horizontally into the cavity 23. The movable disk 24 moves the square block 21 synchronously into the cavity 23. At this time, the square block 21 is disengaged from the square groove 22, and then the impeller body 11 is taken out from between the two rotating shafts 13, thereby conveniently realizing the disassembly of the impeller body 11, thereby effectively improving the convenience of the maintenance operation of the impeller body 11. During the operation of the double-suction centrifugal pump, the pumped water enters the centrifugal pump pipe 3 through one end of the water inlet flange 31. During this process, the water flow first enters the equipment sleeve 51, and the filter disc 59 filters the debris and impurities in the water flow. At the same time, the flow rate of the water flow causes the multiple blades 53 to rotate, and the multiple blades 53 cause the rotating shaft 52 to rotate. The rotating shaft 52 causes the multiple scrapers 57 and the multiple rubber scraping strips 58 to revolve in a circle through the rotating seat 56. The circumferential revolution of the scrapers 57 and the rubber scraping strips 58 scrapes off the debris and attached impurities on one side of the filter disc 59, avoiding the filter holes of the filter disc 59 from being blocked, ensuring the normal operation of the water flow filtration operation, thereby conveniently realizing continuous filtration when the double-suction centrifugal pump is inlet, avoiding damage to the components in the double-suction centrifugal pump, and thus improving the service life of the double-suction centrifugal pump. When the filter mechanism 5 needs to be maintained or replaced, the operator first rotates the two locking screws 61 counterclockwise to disengage the two locking screws 61 from the corresponding threaded holes 62, and then removes the equipment sleeve 51 from the centrifugal pump pipeline 3; Subsequently, the operator pulls the pull rod 67 by pulling the handle 69, and the pull rod 67 moves the limit seat 66 into the movable groove 65, and the spring 68 contracts. At this time, the limit ring 63 is released from the limit, and the limit ring 63 and the sealing ring 64 at one end of the equipment sleeve 51 are taken out, and then the filter disc 59 is taken out, and the filter mechanism 5 can be maintained or replaced, thereby conveniently realizing the overall disassembly of the filter mechanism 5, thereby improving the convenience of maintenance or replacement of the filter mechanism 5.

[0038] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A double-suction centrifugal pump, comprising a centrifugal pump pipeline (3) and an impeller casing (4), characterized in that: The impeller housing (4) is fixedly arranged on the upper part of the centrifugal pump pipeline (3); one end of the centrifugal pump pipeline (3) is provided with a water inlet flange (31); the other end of the centrifugal pump pipeline (3) is provided with a water outlet flange (32); a filtering mechanism (5) is provided at a position of the centrifugal pump pipeline (3) close to the water inlet flange (31); and a disassembly assembly (6) is provided between the filtering mechanism (5) and the centrifugal pump pipeline (3).

2. A double-suction centrifugal pump according to claim 1, characterized in that: The filtering mechanism (5) comprises a device sleeve (51), which is detachably mounted on the inner wall of a centrifugal pump pipe (3), a rotating shaft (52) is rotatably provided in the device sleeve (51), a plurality of blades (53) distributed in an annular array are fixedly provided at one end of the rotating shaft (52), a rotating seat (56) is fixedly provided at the other end of the rotating shaft (52), a plurality of scrapers (57) distributed in an annular array are fixedly provided on the outer wall of the rotating seat (56), a rubber scraper (58) is fixedly provided on one side of the scraper (57), a filter disc (59) is detachably mounted on the inner wall of one end of the device sleeve (51), and one side of the rubber scraper (58) is in movable contact with one side of the filter disc (59).

3. A double-suction centrifugal pump according to claim 2, characterized in that: Two fixing rods (54) are fixedly provided at one end of the equipment sleeve (51), a fixing seat (55) is fixedly provided between the two fixing rods (54), and one end of the rotating shaft (52) is rotatably connected to one end of the fixing seat (55).

4. A double-suction centrifugal pump according to claim 2, characterized in that: The disassembly assembly (6) includes a locking screw (61) and a limit ring (63), two locking screws (61) are provided, and the locking screws (61) are threadedly mounted on the centrifugal pump pipeline (3), two threaded holes (62) are provided on the outer wall of one end of the equipment sleeve (51), one end of the locking screw (61) is threadedly connected to the inner wall of the threaded hole (62), the limit ring (63) is movably provided on the inner wall of one end of the equipment sleeve (51), and two limit seats (66) are slidably provided on the inner wall of one end of the equipment sleeve (51), and one side of the limit seat (66) is in movably contact with one side of the limit ring (63).

5. A double-suction centrifugal pump according to claim 4, characterized in that: A sealing ring (64) is fixedly provided on the other side of the limit retaining ring (63), and one side of the sealing ring (64) is in movable contact with the other side of the filter disc (59).

6. A double-suction centrifugal pump according to claim 4, characterized in that: Two movable grooves (65) are provided on the inner wall of one end of the device sleeve (51), the limit seat (66) is slidably provided at one end of the movable groove (65), a pull rod (67) is movably inserted inside the movable groove (65), one end of the pull rod (67) is fixedly connected to one end of the limit seat (66), an outer movable sleeve of the pull rod (67) is provided with a spring (68), one end of the spring (68) is fixedly connected to the inner wall of the movable groove (65), and the other end of the spring (68) is fixedly connected to one end of the limit seat (66).

7. A double-suction centrifugal pump according to claim 6, characterized in that: A pulling handle (69) is fixedly provided at the other end of the pull rod (67), two No. 2 guide grooves (7) are provided on the side wall of the movable groove (65), and No. 2 guide blocks (71) are fixedly provided on both sides of the limit seat (66), and the No. 2 guide blocks (71) are slidably provided on the inner wall of the No. 2 guide groove (7).

8. An impeller for a double-suction centrifugal pump according to any one of claims 1 to 7, comprising an impeller member (1), characterized in that: The impeller member (1) comprises an impeller body (11), a fixed shaft (12) and a rotating shaft (13); the impeller body (11) is fixedly arranged in the middle of the fixed shaft (12); two rotating shafts (13) are provided; the fixed shaft (12) is detachably installed between the two rotating shafts (13); and an assembly component (2) is provided between the fixed shaft (12) and the rotating shaft (13).

9. The impeller of a double-suction centrifugal pump according to claim 8, characterized in that: The assembly component (2) includes a square block (21), two of the square blocks (21) are provided, and the two square blocks (21) are symmetrically provided at the ends of the fixed shaft (12), one end of each of the two rotating shafts (13) is provided with a square groove (22), and the inner wall of the square block (21) and the square groove (22) are in movable contact; Both ends of the fixed shaft (12) are provided with cavities (23), and one end of each of the two cavities (23) is slidably provided with a movable disk (24), wherein one of the square blocks (21) is fixedly provided on one side of the movable disk (24), and a notch (25) is provided on the peripheral wall of the cavity (23), and a movable seat (26) is slidably provided in the notch (25), and one side of the movable seat (26) is fixedly connected to the outer wall of the movable disk (24), and a threaded rod (27) is rotatably installed in the notch (25), and the threaded rod (27) passes through the movable seat (26) and is threadedly rotatably connected to the movable seat (26).

10. The impeller of a double-suction centrifugal pump according to claim 9, characterized in that: A hexagonal seat (28) is fixedly provided at one end of the threaded rod (27), two No. 1 guide grooves (29) are provided on the side walls of the notch (25), and No. 1 guide blocks (291) are fixedly provided on both sides of the movable seat (26), and the No. 1 guide blocks (291) are slidably provided on the inner walls of the No. 1 guide grooves (29).

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