Efficient centrifugal immersed pump

Abstract

The efficient centrifugal immersed pump comprises an immersed pump body and a pump pool body, the pump pool body comprises a shell, a liquid inlet pipe and a liquid return pipe, the liquid inlet pipe and the liquid return pipe both penetrate through the shell and are communicated with the interior of the shell, a first flange plate is installed on the immersed pump body, and a second flange plate is installed on the top of the first flange plate. The immersed pump body is installed in the shell through a second flange plate, a protection box is fixed to the bottom of the second flange plate, the immersed pump body is installed in the protection box, a through groove is further formed in the bottom of the protection box, a plurality of connecting pieces are further welded to the outer wall of the immersed pump body, and the connecting pieces are located on the side wall and the bottom of the immersed pump body correspondingly. The side wall and the bottom of the protection box are each provided with a shock absorber, one end of each shock absorber is fixed to the inner wall of the protection box, the other end of each shock absorber is fixed to the corresponding connecting piece, and the problem that the working efficiency and the service life of the immersed pump are affected due to the fact that the immersed pump is arranged in a suspended mode in the installation process, and vibration and noise are likely to happen in the operation process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible pumps, in particular to a high-efficiency centrifugal submersible pump. Background Art

[0002] LNG cryogenic submersible pump is the key equipment for realizing LNG liquefaction, transportation, reception and other links. The performance of LNG submersible pump has a great impact on the safety and economy of liquefied natural gas transportation and transfer.

[0003] Existing centrifugal submersible pumps are often installed in a submersible pump pool during the installation process. The submersible pump pool is sealed by installing a flange on the top. The submersible pump is often installed on the bottom of the flange to achieve fixed installation of the submersible pump. When the flange is installed, the submersible pump will also be installed in the submersible pump pool. This structure will cause the installed submersible pump to be suspended in the air inside the pump pool, as shown in the prior art CN214742150U. When the submersible pump is in a suspended setting, it will cause the submersible pump to vibrate and make noise during operation, and will also affect the working efficiency of the submersible pump. At the same time, long-term vibration work will greatly reduce the service life of the submersible pump. A solution is proposed below to the above problems. Utility Model Content

[0004] The utility model aims to provide a high-efficiency centrifugal submersible pump, which solves the problem that the existing submersible pump proposed in the above background technology is suspended during installation, which may cause vibration and noise during operation, affecting working efficiency and service life.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A high-efficiency centrifugal submersible pump comprises a submersible pump body and a pump pool body, the pump pool body comprises a shell, a liquid inlet pipe and a liquid return pipe, the liquid inlet pipe and the liquid return pipe both pass through the shell and communicate with the interior of the shell, a flange one is installed on the submersible pump body, a flange two is installed on the top of the flange one, the flange two and the shell are fixed by bolts, the submersible pump body is installed inside the shell through the flange two, a protection box is fixed at the bottom of the flange two, the submersible pump body is installed in the protection box, a through groove is also opened at the bottom of the protection box, a plurality of connecting parts are welded to the outer wall of the submersible pump body, the connecting parts are respectively located on the side wall and the bottom of the submersible pump body, shock absorbers are installed on the side wall and the bottom of the protection box, one end of the shock absorber is fixed to the inner wall of the protection box, the other end of the shock absorber is fixed to the connecting part, and a support assembly for supporting the protection box is also installed between the protection box and the inner bottom wall of the shell.

[0007] Preferably, the support assembly includes two support seats and two fixing rods, wide grooves are symmetrically provided on the inner bottom wall of the shell, the support seats are fixed in the wide grooves by bolts, the wide grooves and the bottom of the support seats are both square structures, the fixing rods are threadedly matched with the top threads of the support seats, the threads on the side walls of the support seats are threadedly matched with locking bolts, the locking bolts are matched with the fixing rods, and a slot matching the fixing rods is provided at the bottom of the protective box, and the fixing rods are clamped in the slots.

[0008] Preferably, a connecting hole communicating with the submersible pump body is provided on the second flange, a liquid outlet pipe is installed on the connecting hole, a third flange is installed on the liquid outlet pipe, and the first flange and the third flange are connected by bolts.

[0009] Preferably, sealing gaskets are installed on the flange one and the flange three, and the two sealing gaskets are respectively connected to the upper and lower ends of the flange two.

[0010] Preferably, the shell comprises an outer shell and an inner shell, and the submersible pump body is installed in the inner shell of the shell.

[0011] Preferably, one end of the liquid inlet pipe and the liquid return pipe respectively penetrates the outer shell and the inner shell and communicates with the interior of the inner shell.

[0012] Preferably, the shock absorber adopts a damping rod structure.

[0013] Beneficial effect: During the installation of the submersible pump body, the submersible pump body is first installed to the bottom of flange two, so that the submersible pump body and flange two are connected. By welding multiple connecting parts on the submersible pump body, the shock absorber can be installed on the connecting parts. After the connecting parts are installed, a protective box is installed on the outside of the submersible pump body. The protective box will also be fixed to the bottom of flange two. The other end of the shock absorber can be fixed through the protective box. The side wall and the bottom of the submersible pump body are supported and fixed through each shock absorber. In the process of supporting the submersible pump body, the shock absorber can also be used to dampen the vibration generated during the operation of the submersible pump, slow down the shaking of the submersible pump body, thereby reducing the noise generated during its operation, and improve the operating efficiency and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment;

[0015] Figure 2 This is a schematic diagram of the internal structure of the housing used to illustrate the embodiment;

[0016] Figure 3 This is a schematic diagram of the internal structure of the housing and the protection box used in the embodiment;

[0017] Figure 4 The embodiment is a schematic cross-sectional structure diagram for showing the housing and the protection box;

[0018] Figure 5 For example, the Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 6 The embodiment is a schematic cross-sectional structure diagram for illustrating a support base and a fixing rod.

[0020] Figure numerals: 1. Submersible pump body; 2. Pump pool body; 3. Shell; 4. Liquid inlet pipe; 5. Liquid return pipe; 6. Flange one; 7. Flange two; 8. Protection box; 9. Through groove; 10. Connecting piece; 11. Shock absorber; 12. Support assembly; 13. Support seat; 14. Fixing rod; 15. Wide groove; 16. Card slot; 17. Connecting hole; 18. Liquid outlet pipe; 19. Flange three. DETAILED DESCRIPTION

[0021] See Figures 1 to 6 As shown, a high-efficiency centrifugal submersible pump includes a submersible pump body 1 and a pump pool body 2. The pump pool body 2 includes a shell 3, a liquid inlet pipe 4 and a liquid return pipe 5. The liquid inlet pipe 4 and the liquid return pipe 5 both penetrate the shell 3 and communicate with the inside of the shell 3. The shell 3 adopts an outer shell 3 and an inner shell. The submersible pump body 1 is installed in the inner shell of the shell 3. The shell 3 is designed as an outer shell 3 and an inner shell, and a cavity is provided between the outer shell 3 and the inner shell, thereby realizing a double-wall design to prevent the external heat from being transferred to the shell 3 when the submersible pump body 1 is running, causing the LNG inside the pump pool body 2 to vaporize. The double shell 3 design can achieve a heat insulation effect.

[0022] One end of the liquid inlet pipe 4 and the liquid return pipe 5 respectively penetrates the outer shell 3 and the inner shell and communicates with the interior of the inner shell. The liquid inlet pipe 4 and the liquid return pipe 5 are fixed to the shell 3 by welding.

[0023] A flange 16 is installed on the submersible pump body 1, and a flange 27 is installed on the top of the flange 16. The flange 27 and the outer shell 3 are fixed with bolts. The submersible pump body 1 is installed inside the shell 3 through the flange 27. A connecting hole 17 communicating with the submersible body is opened on the flange 27. A liquid outlet pipe 18 is installed on the connecting hole 17. A flange 3 19 is installed on the liquid outlet pipe 18. The flange 16 and the flange 3 19 are connected with bolts. In the process of installing the submersible pump body 1, the liquid outlet pipe 18 is first inserted into the connecting hole 17. The liquid pipe 18 enters into the connecting hole 17, and the flange three 19 will be located at the top of the flange two 7 and contact with the flange two 7. At this time, the submersible pump body 1 will be installed to the bottom of the flange two 7, and the flange one 6 on the submersible pump body 1 will contact with the bottom of the flange two 7. The flange two 7 is also provided with a plurality of threaded holes that match the flange one 6 and the flange three 19. The fixing bolts are installed on the flange two 7, and the fixing bolts will pass through the flange two 7 to connect with the flange one 6. The fixing bolts are used to fix the flange one 6 and the flange three 19.

[0024] Sealing gaskets are installed in flange one 6 and flange three 19, and the two sealing gaskets are connected and contacted with the upper and lower ends of flange two 7 respectively. The upper and lower ends of flange two 7 are provided with installation grooves matching with the sealing gaskets. When flange one 6 is in contact with flange three 19 and flange two 7, the sealing gasket will enter the installation groove, and the sealing gasket will play a sealing role by installing it.

[0025] A protection box 8 is fixed to the bottom of the flange 27, and the submersible pump body 1 is installed in the protection box 8. A through groove 9 is also opened at the bottom of the protection box 8. A plurality of connectors 10 are welded to the outer wall of the submersible pump body 1. The connectors 10 are respectively located on the side wall and the bottom of the submersible pump body 1. Shock absorbers 11 are installed on the side wall and the bottom of the protection box 8. One end of the shock absorber 11 is fixed to the inner wall of the protection box 8, and the other end of the shock absorber 11 is fixed to the connector 10. When the submersible pump body 1 is installed to the bottom of the flange 27, each shock absorber 11 can be installed on the connector 10. The shock absorbers 11 are respectively located on the side wall and the bottom of the submersible pump body 1, so that the submersible pump can be The side walls and the bottom of the main body 1 play a supporting role. After the shock absorber 11 is installed, the protective box 8 can be installed on the outside of the submersible pump body 1. The protective box 8 is fixed to the bottom of the flange 7 by bolts. After the protective box 8 is installed, the shock absorber 11 can be installed on the protective box 8 by bolts, so as to fix the two ends of the shock absorber 11. The shock absorber 11 adopts a damping rod structure. In the process of supporting the submersible pump body 1, the shock absorber 11 can also perform shock absorption treatment on the vibration generated during the operation of the submersible pump, slow down the shaking of the submersible pump body 1, thereby reducing the noise generated during its operation, and improving the operating efficiency and service life of the equipment.

[0026] A support assembly 12 for supporting the protection box 8 is also installed between the protection box 8 and the inner bottom wall of the shell 3. The support assembly 12 includes two support seats 13 and two fixing rods 14. The inner bottom wall of the shell 3 is symmetrically provided with wide grooves 15. The support seat 13 is fixed in the wide grooves 15 by bolts. The fixing rod 14 is matched with the top thread of the support seat 13. The thread on the side wall of the support seat 13 is matched with the locking bolt. The locking bolt is matched with the fixing rod 14. The bottom of the protection box 8 is provided with a card slot 1 that matches the fixing rod 14. 6. The fixing rod 14 is clamped in the clamping groove 16. When the protection box 8 is installed, the extension distance of the fixing rod 14 can be adjusted by the depth of the shell 3 and the length of the protection box 8, so that the fixing rod 14 can be matched with the protection box 8. When the fixing rod 14 is adjusted, the locking bolt is seen so that the side wall of the support seat 13 is rotated into the support seat 13, and the locking bolt is used to achieve abutment with the fixing rod 14 to prevent the fixing rod 14 from moving when it is used later. The locking bolt can fix the fixing rod 14. After the fixing rod 14 is adjusted, the support seat 13 is installed in the inner shell, and the support seat 13 can be directly installed in the wide groove 15. The bottom of the wide groove 15 and the support seat 13 are both square structures. By designing the wide groove 15 and the support seat 13 as square structures, it is convenient to position the support seat 13. The threaded holes on the support seat 13 and the wide groove 15 can directly correspond to each other, which is convenient for later assembly and fixing. The support seat 13 is fixed in the wide groove 15 by turning the bolts with an extended wrench. At this time, the flange 27 is installed to the top of the shell 3, and the fixed installation between the flange 27 and the shell 3 is achieved by tightening the bolts. During the installation of the flange 27, the protection box 8 and the submersible pump body 1 will both enter the inner shell. The continuous moving installation of the protection box 8 in the inner shell will contact the fixing rod 14 at the bottom of the inner shell, and the fixing rod 14 will enter the slot 16. The fixing rod 14 can support the protection box 8, making the installation of the protection box 8 more stable.

[0027] Working principle: During the installation of the submersible pump body 1, the liquid outlet pipe 18 and the submersible pump body 1 are first installed to the upper and lower ends of the flange 27 respectively. The liquid outlet pipe 18 and the submersible pump body 1 are connected and fixed to the flange 27 through the flange 16 and the flange 3 19. By welding a plurality of connecting parts 10 on the submersible pump body 1, the shock absorber 11 can be installed on the connecting part 10. After the connecting parts 10 are installed, the protection box 8 is installed on the outside of the submersible pump body 1. The protection box 8 will also be fixed to the bottom of the flange 27. The other end of the shock absorber 11 can be fixed through the protection box 8. The side wall and the bottom of the submersible pump body 1 are supported and fixed through the shock absorbers 11. When the protection box 8 and the submersible pump body 1 enter the interior of the shell 3 through the flange 27, the bottom of the protection box 8 is supported by the support assembly 12.

Claims

1. A high-efficiency centrifugal submersible pump, comprising a submersible pump body (1) and a pump tank body (2), characterized in that: The pump pool body (2) comprises a shell (3), a liquid inlet pipe (4) and a liquid return pipe (5); the liquid inlet pipe (4) and the liquid return pipe (5) both penetrate the shell (3) and communicate with the interior of the shell (3); a flange plate 1 (6) is installed on the submersible pump body (1); a flange plate 2 (7) is installed on the top of the flange plate 1 (6); the flange plate 2 (7) and the shell (3) are fixed by bolts; the submersible pump body (1) is installed inside the shell (3) through the flange plate 2 (7); a protective box (8) is fixed to the bottom of the flange plate 2 (7); the submersible pump body (1) is installed In the protection box (8), a through groove (9) is also provided at the bottom of the protection box (8), and a plurality of connecting pieces (10) are welded to the outer wall of the submersible pump body (1), and the connecting pieces (10) are respectively located at the side wall and the bottom of the submersible pump body (1). Shock absorbers (11) are installed on the side wall and the bottom of the protection box (8), and one end of the shock absorber (11) is fixed to the inner wall of the protection box (8), and the other end of the shock absorber (11) is fixed to the connecting piece (10). A support assembly (12) for supporting the protection box (8) is also installed between the protection box (8) and the inner bottom wall of the shell (3).

2. A high-efficiency centrifugal submersible pump according to claim 1, characterized in that: The support assembly (12) comprises two support seats (13) and two fixing rods (14); a wide groove (15) is symmetrically provided on the inner bottom wall of the shell (3); the support seat (13) is fixed in the wide groove (15) by bolts; the wide groove (15) and the bottom of the support seat (13) are both square structures; the fixing rod (14) is threadedly matched with the top of the support seat (13); a locking bolt is threadedly matched on the side wall of the support seat (13); the locking bolt is matched with the fixing rod (14); a slot (16) matched with the fixing rod (14) is provided at the bottom of the protection box (8); the fixing rod (14) is snapped into the slot (16).

3. A high-efficiency centrifugal submersible pump according to claim 1, characterized in that: The second flange (7) is provided with a connection hole (17) which is in communication with the submersible pump body (1), the connection hole (17) is provided with a liquid outlet pipe (18), the liquid outlet pipe (18) is provided with a third flange (19), and the first flange (6) and the third flange (19) are connected by bolts.

4. A high-efficiency centrifugal submersible pump according to claim 3, characterized in that: Sealing gaskets are installed on both the flange plate 1 (6) and the flange plate 3 (19), and the two sealing gaskets are respectively connected to the upper and lower ends of the flange plate 2 (7).

5. A high-efficiency centrifugal submersible pump according to claim 1, characterized in that: The housing (3) comprises an outer housing and an inner housing, and the submersible pump body (1) is installed in the inner housing of the housing (3).

6. A high-efficiency centrifugal submersible pump according to claim 5, characterized in that: One end of the liquid inlet pipe (4) and the liquid return pipe (5) respectively penetrates the outer shell and the inner shell and communicates with the interior of the inner shell.

7. A high-efficiency centrifugal submersible pump according to claim 1, characterized in that: The shock absorber (11) adopts a damping rod structure.

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