Water seal hole of modularized multi-stage pump
By designing the structure of water inlet section, partition plate and filler box water sealing holes, the problem of the modular multi-stage pump water sealing pipe structure is solved, and the effect of convenient installation, reduced leakage risk and improved seal stability is achieved.
Patent Information
- Application Number
- CN202422542422.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The water sealing pipe structure of the modular multi-stage pump is not easy to install, is inconvenient to transport, and is poorly stable, and has the risk of fluid media leakage, affecting the safe operation and maintenance convenience of the equipment.
The structural design of water sealing holes in the water inlet section, partition water sealing holes and filler box water sealing holes is adopted to replace the traditional water sealing pipes. Through these water sealing holes, the fluid medium is transported to the packing seal for lubrication and cooling, simplifying the structure and improving sealing stability.
The overall structure of the modular multi-stage pump is simplified, which is easy to install and transport, reduces the risk of fluid media leakage, improves the lubrication and cooling effect of the seal of water inlet and outlet water filler, and enhances the stability and safety of the equipment.
Smart Images
Figure CN223136460U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of modular multi-stage pumps, and particularly relates to a water seal hole of a modular multi-stage pump. Background Art
[0002] The modular multi-stage pump is a newly emerging multi-stage centrifugal pump for mines. Its components such as the inlet section, outlet section, and middle section are manufactured by forging. Compared with the components such as the inlet section, outlet section, and middle section made by traditional casting, it has the characteristics of uniform metallographic structure and high compressive strength, and can be widely used in the technical field of drainage systems for ultra-deep mines.
[0003] At present, the sealing forms of the inlet section and outlet section of modular multi-stage pumps are mainly packing seals or mechanical seals. Among them, the packing seal usually uses graphite packing as the sealing material, and is lubricated and cooled with cooling water to avoid the phenomenon of rapid wear of the graphite packing due to increased friction. In order to simplify the system structure of the modular multi-stage pump, without adding additional auxiliary structures or components, the conveying medium at the outlet of the first-stage impeller is conveyed to the packing seals of the inlet section and outlet section through a water seal pipe. In order to facilitate installation and maintenance, threaded holes for the water seal pipe need to be opened on the inlet section body and the stuffing box body of the outlet section, which also increases the risk of leakage of the fluid medium in the water seal pipe. Moreover, the water seal pipe is installed outside the multi-stage pump, increasing the risks of transportation and safe operation.
[0004] In view of this, compared with traditional multi-stage centrifugal pumps for mines, the inlet section, outlet section, middle section, and stuffing box body of modular multi-stage pumps have been structurally improved accordingly, providing a new solution for the lubrication and cooling problems of the packing seals of modular multi-stage pumps, effectively solving the drawbacks and defects of the water seal pipes of traditional multi-stage centrifugal pumps for mines, and improving the stability of multi-stage pumps for mines. Summary of the Utility Model
[0005] In view of the above technical defects, the utility model designs a technical solution for the lubrication and cooling of the packing seal of a modular multi-stage pump based on a water seal hole, and proposes a water seal hole of a modular multi-stage pump.
[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0007] A water seal hole of a modular multi-stage pump includes a water seal hole in the inlet section, a water seal hole in the partition plate, a water seal hole in the first-stage middle section, and a water seal hole in the stuffing box body. One end of the water seal hole in the first-stage middle section is connected to the outlet of the first-stage impeller, and the other end of the water seal hole in the first-stage middle section is connected to the water seal hole in the inlet section through the water seal hole in the partition plate. The water seal hole in the inlet section is connected to the water seal ring of the inlet packing seal. One end of the water seal hole in the stuffing box body is connected to the cavity formed by the stuffing box body, the outlet section, and the balance disk, and the other end of the water seal hole in the stuffing box body is connected to the water seal ring of the outlet packing seal.
[0008] Furthermore, the water seal holes in the water inlet section include vertical water seal holes, horizontal water seal holes and water inlet plugging bolts. The axis of the vertical water seal hole is in the vertical direction. One end of the vertical water seal hole is connected to the water seal ring of the water inlet packing seal, and the other end of the vertical water seal hole is arranged on the outer surface of the water inlet section. And a threaded hole is provided near the outer surface of the water inlet section of the vertical water seal hole. The water inlet plugging bolt is installed at one end of the vertical water seal hole through the threaded hole for plugging the leakage of the fluid medium in the water seal hole of the water inlet section. The axis of the horizontal water seal hole is in the horizontal direction. One end of the horizontal water seal hole is communicated with the vertical water seal hole, and the other end of the horizontal water seal hole is communicated with the partition water seal hole.
[0009] Furthermore, the water seal holes in the first-stage middle section include middle-section horizontal holes, middle-section vertical holes and middle-section plugging bolts. One end of the vertical water seal hole in the middle section is communicated with the outlet of the first-stage impeller. The other end of the middle-section vertical hole is arranged on the outer surface of the first-stage middle section. And a threaded hole is provided near the outer surface of the first-stage middle section of the middle-section vertical hole. The middle-section plugging bolt is installed at one end of the middle-section vertical hole through the threaded hole for plugging the leakage of the fluid medium in the water seal hole of the first-stage middle section. One end of the middle-section horizontal hole is communicated with the middle-section vertical hole, and the other end of the middle-section horizontal hole is communicated with the partition water seal hole.
[0010] Furthermore, there are two water seal holes in the stuffing box body. The axes of the two water seal holes in the stuffing box body are in the vertical direction and are symmetrically arranged in the inner cavity of the stuffing box body.
[0011] Furthermore, the cross-sections of the water seal holes in the water inlet section, the partition water seal holes, the water seal holes in the first-stage middle section and the water seal holes in the stuffing box body are all circular. The diameters of the water seal holes in the water inlet section, the partition water seal holes and the water seal holes in the first-stage middle section depend on the head of the first-stage impeller of the modular multistage pump. The diameter of the water seal hole in the stuffing box body depends on the cavity pressure formed by the balance disk, the water outlet section and the stuffing box body of the modular multistage pump.
[0012] Compared with the prior art, for the water seal holes of the modular multistage pump described in the present invention, through the water seal holes in the water inlet section, the partition water seal holes and the water seal holes in the first-stage middle section, the fluid medium at the outlet of the first-stage impeller of the modular multistage pump can be conveyed to the water inlet packing seal. At the same time, through the water seal holes in the stuffing box body, the fluid medium in the cavity formed by the balance disk, the water outlet section and the stuffing box body can be conveyed to the water outlet packing seal, replacing the water seal pipe structure of the traditional mine multistage centrifugal pump. It not only simplifies the overall structure of the mine multistage centrifugal pump, but also solves the technical problems of difficult installation, inconvenient transportation and poor stability of the traditional water seal pipe structure. Description of the Drawings
[0013] Figure 1 is the overall structure diagram of the present invention;
[0014] Figure 2 isFigure 1 Left view;
[0015] Figure 3 is Figure 1 Partial enlarged view of A in
[0016] Figure 4 is Figure 1 Partial enlarged view of B in
[0017] Figure 5 Cross-sectional view of the water inlet section of the present utility model.
[0018] The markings in the figure are: 1: water inlet section; 11: water inlet packing seal; 12: water seal ring; 13: vertical water seal hole; 14: horizontal water seal hole; 15: water inlet plugging bolt; 2: partition plate; 21: partition plate water seal hole; 3: first-stage impeller; 4: first-stage middle section; 41: middle section horizontal hole; 42: middle section vertical hole; 43: middle section plugging bolt; 5: stuffing box body; 51: water outlet packing seal; 52: stuffing box body water seal hole; 6: water outlet section; 7: balance disk. Specific embodiments
[0019] In order to make the technical problems, technical solutions and implementation effects to be solved by the present utility model clearer, the following is a further description of an embodiment of the present utility model in conjunction with the attached Figures 1-5 :
[0020] Referring to the attached Figures 1-5 , the water seal holes of a modular multi-stage pump of the present utility model include water inlet section water seal holes, partition plate water seal holes 21, first-stage middle section water seal holes and stuffing box body water seal holes 52. One end of the first-stage middle section water seal holes is connected to the outlet of the first-stage impeller 3, and the other end of the first-stage middle section water seal holes is connected to the water inlet section water seal holes through the partition plate water seal holes 21. The water inlet section water seal holes are connected to the water seal ring 12 of the water inlet packing seal 11. One end of the stuffing box body water seal holes 52 is connected to the cavity formed by the stuffing box body 5, the water outlet section 6 and the balance disk 7, and the other end of the stuffing box body water seal holes 52 is connected to the water seal ring 12 of the water outlet packing seal 51.
[0021] As a preferred embodiment, the water inlet section water seal holes include vertical water seal holes 13, horizontal water seal holes 14 and water inlet plugging bolts 15. The axis of the vertical water seal holes 13 is in the vertical direction. One end of the vertical water seal holes 13 is connected to the water seal ring 12 of the water inlet packing seal 11, and the other end of the vertical water seal holes 13 is arranged on the outer surface of the water inlet section 1. And a threaded hole is provided near the outer surface of the water inlet section 1 of the vertical water seal holes 13. The water inlet plugging bolts 15 are installed at one end of the vertical water seal holes 13 through the threaded hole for plugging the leakage of fluid medium in the water inlet section water seal holes. The axis of the horizontal water seal holes 14 is in the horizontal direction. One end of the horizontal water seal holes 14 is connected to the vertical water seal holes 13, and the other end of the horizontal water seal holes 14 is connected to the partition plate water seal holes 21.
[0022] As a preferred embodiment, the water seal holes in the water inlet section can all be formed by a drilling machine or directly by forging. When forming the water seal holes in the water inlet section by drilling, a vertical water seal hole 13 is drilled from the bottom of the water inlet section 1 to the water seal ring 12 of the water inlet packing seal 11, and then a horizontal water seal hole 14 is drilled from the inner side surface of the water inlet section 1 to the vertical water seal hole 13, and then a threaded groove is opened at the end of the vertical water seal hole 13.
[0023] As a preferred embodiment, the water seal holes in the first-stage middle section include a middle-section horizontal hole 41, a middle-section vertical hole 42, and a middle-section plugging bolt 43. One end of the vertical water seal hole 13 in the middle section is connected to the outlet of the first-stage impeller 3, and the other end of the middle-section vertical hole 42 is arranged on the outer surface of the first-stage middle section 4. And a threaded hole is provided near the outer surface of the first-stage middle section 4 of the middle-section vertical hole 42. The middle-section plugging bolt 43 is installed at one end of the middle-section vertical hole 42 through the threaded hole for plugging the leakage of the fluid medium in the water seal holes of the first-stage middle section. One end of the middle-section horizontal hole 41 is connected to the middle-section vertical hole 42, and the other end of the middle-section horizontal hole 41 is connected to the partition water seal hole 21.
[0024] As a preferred embodiment, the forming method of the water seal holes in the first-stage middle section is the same as that of the water seal holes in the water inlet section.
[0025] As a preferred embodiment, there are two water seal holes 52 in the stuffing box body. The axes of the two water seal holes 52 are in the vertical direction and are symmetrically arranged in the inner cavity of the stuffing box body 5.
[0026] As a preferred embodiment, the cross-sections of the water seal holes in the water inlet section, the partition water seal hole 21, the water seal holes in the first-stage middle section, and the water seal holes 52 in the stuffing box body are all circular. The diameters of the water seal holes in the water inlet section, the partition water seal hole 21, and the water seal holes in the first-stage middle section depend on the head of the first-stage impeller 3 of the modular multi-stage pump. The diameter of the water seal hole 52 in the stuffing box body depends on the cavity pressure formed by the balance disk 7, the water outlet section 6, and the stuffing box body 5 of the modular multi-stage pump.
[0027] As a preferred embodiment, positioning holes are provided between the contact surfaces of the partition 2 with the water inlet section 1 and between the contact surfaces of the partition 2 with the first-stage middle section 4. The partition 2 is installed at the right end face of the water inlet section 1 through the positioning pins and the positioning holes, so as to ensure that the axes of the partition water seal hole 21 and the horizontal water seal hole 14 coincide; the first-stage middle section 4 is installed at the right end face of the partition 2 through the positioning pins and the positioning holes, so as to ensure that the axes of the middle-section horizontal hole 41 and the partition water seal hole 21 coincide.
[0028] By adopting the above technical solution, for the water seal holes of a modular multi-stage pump according to the present utility model, when the modular multi-stage pump is operating normally, the inlet plugging bolt 15 and the middle section plugging bolt 43 are respectively fixed to the threaded holes of the vertical water seal hole 13 and the middle section vertical hole 42. Since the pressure of the fluid medium at the outlet of the first-stage impeller 3 is higher than the pressure of the inlet packing seal 11, at this time, a part of the fluid medium at the outlet of the first-stage impeller 3 enters the middle section horizontal hole 41, the partition water seal hole 21, the horizontal water seal hole 14 and the vertical water seal hole 13 in sequence along the middle section vertical hole 42, and then flows into the water seal ring 12 of the inlet packing seal 11, thereby lubricating and cooling the inlet packing seal 11 of the inlet section 1. At the same time, the balance disk 7 of the modular multi-stage pump is always in a state of dynamic adjustment. Under the action of pressure, the fluid medium in the cavity formed by the balance disk 7, the outlet section 6 and the stuffing box body 5 enters the water seal ring 12 of the outlet packing seal 51 along the two stuffing box body water seal holes 52, thereby lubricating and cooling the outlet packing seal 51. If the inlet section water seal hole, the partition water seal hole 21 and the first-stage middle section water seal hole are blocked or partially blocked, they can be dredged by disassembling the inlet plugging bolt 15 and the middle section plugging bolt 43. If the stuffing box body water seal hole 52 is blocked, it can be dredged by disassembling the outlet packing seal 51 or the stuffing box body 5.
[0029] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A water seal hole of a modular multi-stage pump, characterized in that: It includes a water seal hole in the water inlet section, a partition water seal hole (21), a water seal hole in the first-stage middle section, and a stuffing box body water seal hole (52). One end of the water seal hole in the first-stage middle section is connected to the outlet of the first-stage impeller (3), and the other end of the water seal hole in the first-stage middle section is connected to the water seal hole in the water inlet section through the partition water seal hole (21). The water seal hole in the water inlet section is connected to the water seal ring (12) of the water inlet stuffing seal (11). One end of the stuffing box body water seal hole (52) is connected to the cavity formed by the stuffing box body (5), the water outlet section (6), and the balance disk (7), and the other end of the stuffing box body water seal hole (52) is connected to the water seal ring (12) of the water outlet stuffing seal (51).
2. The water seal hole of a modular multi-stage pump according to claim 1, characterized in that: The water seal hole in the water inlet section includes a vertical water seal hole (13), a horizontal water seal hole (14), and a water inlet plugging bolt (15). The axis of the vertical water seal hole (13) is in the vertical direction. One end of the vertical water seal hole (13) is connected to the water seal ring (12) of the water inlet stuffing seal (11), and the other end of the vertical water seal hole (13) is arranged on the outer surface of the water inlet section (1). And a threaded hole is provided near the outer surface of the water inlet section (1) of the vertical water seal hole (13). The water inlet plugging bolt (15) is installed at one end of the vertical water seal hole (13) through the threaded hole for plugging the leakage of the fluid medium in the water seal hole of the water inlet section. The axis of the horizontal water seal hole (14) is in the horizontal direction. One end of the horizontal water seal hole (14) is connected to the vertical water seal hole (13), and the other end of the horizontal water seal hole (14) is connected to the partition water seal hole (21).
3. The water seal hole of a modular multi-stage pump according to claim 1, characterized in that: The water seal hole in the first-stage middle section includes a middle-section horizontal hole (41), a middle-section vertical hole (42), and a middle-section plugging bolt (43). One end of the vertical water seal hole in the middle section is connected to the outlet of the first-stage impeller (3), and the other end of the middle-section vertical hole (42) is arranged on the outer surface of the first-stage middle section (4). And a threaded hole is provided near the outer surface of the first-stage middle section (4) of the middle-section vertical hole (42). The middle-section plugging bolt (43) is installed at one end of the middle-section vertical hole (42) through the threaded hole for plugging the leakage of the fluid medium in the water seal hole of the first-stage middle section. One end of the middle-section horizontal hole (41) is connected to the middle-section vertical hole (42), and the other end of the middle-section horizontal hole (41) is connected to the partition water seal hole (21).
4. The water seal hole of a modular multi-stage pump according to claim 1, characterized in that: There are two stuffing box body water seal holes (52). The axes of the two stuffing box body water seal holes (52) are in the vertical direction and are symmetrically arranged in the inner cavity of the stuffing box body (5).
5. The water seal hole of a modular multi-stage pump according to claim 1, characterized in that: The cross-sections of the water seal hole in the water inlet section, the partition water seal hole (21), the water seal hole in the first-stage middle section, and the stuffing box body water seal hole (52) are all circular. The diameters of the water seal hole in the water inlet section, the partition water seal hole (21), and the water seal hole in the first-stage middle section depend on the head of the first-stage impeller (3) of the modular multistage pump. The diameter of the stuffing box body water seal hole (52) depends on the cavity pressure formed by the balance disk (7), the water outlet section (6), and the stuffing box body (5) of the modular multistage pump.