Multi-stage pump with high sealing performance
By setting up sealed bearings, heating mechanisms and insulation shells in multi-stage pumps, the problem of insufficient sealing is solved, and a higher sealing effect and a longer service life are achieved, avoiding the risk of water entering the motor.
Patent Information
- Application Number
- CN202420726350.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-10
AI Technical Summary
The existing multi-stage pumps have poor sealing properties when connected to the water pipe, which leads to the disconnection of the pump and the water pipe, affecting the use effect. The sealing ring is prone to wear during long-term work, resulting in poor sealing properties, which may cause fluid to enter the motor and cause damage. .
A high-sealing multi-stage pump is designed, using a first sealing bearing at the connection between the pump body and the pump shaft, and enhancing the sealing effect through the sealing box and the second sealing bearing, combining the heating mechanism and the insulation shell, and using an electric heating wire The sealing chamber is heated to evaporate into the body of water, preventing it from entering the drive motor, and improving sealing through the mesh barrel and moisture absorbing filler.
It significantly improves the overall sealing of the multi-stage pump, prevents water leakage and motor damage, extends the service life of the pump, and enhances the sealing effect through heating and insulation measures.
Smart Images
Figure CN222276960U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of multi-stage pumps, and in particular relates to a multi-stage pump with high sealing performance. Background Art
[0002] In the prior art, a multistage pump is a centrifugal pump with an inlet and outlet section and a middle section connected by a tie rod. Its output water pressure can be very high, and it also relies on the rotation of the impeller to obtain centrifugal force, so that the material is drawn out when the gas density reaches the working range of the mechanical vacuum pump, thereby gradually obtaining a high vacuum. When the multistage pump in the prior art is connected to the water pipe, the sealing performance is poor, and there is a lack of an effective fixing mechanism for cooperation.
[0003] However, the above technical solution has poor sealing performance when the multi-stage pump is connected to the water pipe. Therefore, when the connection sealing performance is poor, the multi-stage pump may be disconnected from the water pipe, which seriously affects the use effect of the multi-stage pump.
[0004] The existing patent (application number: CN202223555195.5) proposes a highly sealed multi-stage pump, including a multi-stage pump and a water pipe. The rear inner wall of the multi-stage pump is slidably connected with a button, and the top of the button extends to the outside of the multi-stage pump. The multi-stage pump is fixedly connected with a partition. The beneficial effects are: the water pipe is connected to the multi-stage pump by inserting it into the multi-stage pump, and it is lowered by pressing the button. At this time, the button can assist the rack to move, and the contact plate contacts the water pipe through the elastic force of the No. 2 spring, and the positioning plate is fixed to ensure the effective fixation of the water pipe and increase the sealing of the connection.
[0005] The existing multi-stage centrifugal pump seals generally use sealing rings for sealing. The tighter the sealing ring contacts the movable gap of the pump shaft, the better the waterproof performance. However, while this method improves the waterproof performance, it also increases friction. In addition, during the long-term operation of the pump shaft, the sealing ring is prone to wear, which leads to poor sealing performance, causing the fluid to flow into the motor part, causing damage to the motor and affecting the use of the centrifugal pump.
[0006] In view of this, this application is hereby filed. Utility Model Content
[0007] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a multi-stage pump with high sealing performance to achieve the desired purpose.
[0008] To solve the above technical problems, the utility model provides a highly sealed multi-stage pump, comprising a pump body, a driving motor for driving the pump body to operate is fixedly mounted on the top of the pump body, and a junction box is arranged on the outer wall of the driving motor; a water suction port connected to the interior of the pump body is arranged on the side wall of the lower part of the pump body, and a drainage port connected to the interior of the pump body is arranged on the side wall of the upper part of the pump body, a pump shaft is rotatably mounted inside the pump body, a through hole is opened on the top wall of the pump body, the top end of the pump shaft passes through the through hole and is fixedly connected to the driving end of the driving motor, an impeller is fixedly mounted on the outer wall of the pump shaft, and a sealing assembly for preventing water inside the pump body from leaking from the through hole is arranged on the top wall of the pump body, the sealing assembly comprises a first sealing bearing rotatably mounted inside the through hole, and the pump shaft is inserted into the inner ring of the first sealing bearing.
[0009] Furthermore, the sealing assembly also includes a sealing box fixedly mounted on the outer side of the top wall of the pump body and completely covering the first sealing bearing, a sealing cavity is formed between the inner cavity of the sealing box and the outer side of the top wall of the pump body, and a second sealing bearing matching the pump shaft is provided on the top wall of the sealing box where the pump shaft penetrates.
[0010] Furthermore, it also includes a heating mechanism arranged on the sealing box, the heating mechanism includes an installation cavity opened on the side wall of the sealing box, a heating wire is fixedly installed inside the installation cavity, and the heating wire is electrically connected to the junction box.
[0011] Furthermore, an insulation shell is connected to the outer wall of the sealing box, the insulation shell is made of insulation cotton, and the insulation shell is fixed to the outer wall of the sealing box by bonding.
[0012] Furthermore, a mesh tube is fixedly installed inside the sealing box, the mesh tube is sleeved on the outside of the pump shaft, and a hygroscopic filler is filled between the outer wall of the mesh tube and the inner wall of the sealing box.
[0013] Furthermore, a mounting plate is fixedly connected to the bottom wall of the pump body, and a plurality of mounting holes are arranged on the mounting plate, and the plurality of mounting holes are distributed at the four corners of the mounting plate.
[0014] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.
[0015] 1. In the utility model, by installing the first sealing bearing arranged at the connection between the pump body and the pump shaft and the pump shaft, it can prevent the water inside the pump body from leaking from the connection between the pump body and the pump shaft, and achieve a certain sealing effect. By adding a sealing box and a second sealing bearing arranged on the outer wall of the pump body, the sealing effect of the connection between the pump body and the pump shaft can be further improved, thereby enhancing the overall sealing of the multi-stage pump.
[0016] 2. In the utility model, the electric heating wire can be energized through the drain port, and the sealing chamber can be heated after the electric heating wire is energized. When the multi-stage pump is working, the water that has penetrated the first sealing bearing can only enter the sealing chamber first, and then be evaporated by the high temperature generated by the electric heating wire heating the sealing chamber, thereby preventing the water from entering the drive motor, thereby enhancing the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:
[0018] Figure 1 This is a front view structural schematic diagram of the utility model;
[0019] Figure 2 It is a rear view structural schematic diagram of the utility model;
[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;
[0021] Figure 4 for Figure 3 A magnified view of the structure at center.
[0022] Numbers in the figure: 1. Drive motor; 2. Pump body; 3. Mounting plate; 4. Water intake port; 5. Discharge port; 6. Junction box; 7. Pump shaft; 8. Impeller; 9. First sealed bearing; 10. Sealing box; 11. Second sealed bearing; 12. Sealing chamber; 13. Mesh cylinder; 14. Hygroscopic filler; 15. Mounting chamber; 16. Heating wire; 17. Insulation shell.
[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.
[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] like Figures 1 to 4 As shown, the utility model provides a multi-stage pump with high sealing performance.
[0028] Specifically, by Figure 1-4 The invention comprises a pump body 2, a driving motor 1 for driving the pump body 2 is fixedly installed on the top of the pump body 2, a junction box 6 is arranged on the outer wall of the driving motor 1, a mounting plate 3 is fixedly connected to the bottom wall of the pump body 2, a plurality of mounting holes are arranged on the mounting plate 3, and the plurality of mounting holes are distributed at the four corners of the mounting plate 3, and the pump body 2 can be stably mounted at a designated position for use by the mounting plate 3 arranged on the bottom wall of the pump body 2, a water suction port 4 connected to the inside of the pump body 2 is arranged on the side wall of the lower part of the pump body 2, a drainage port 5 connected to the inside of the pump body 2 is arranged on the side wall of the upper part of the pump body 2, a pump shaft 7 is rotatably installed inside the pump body 2, and a through hole is opened on the top wall of the pump body 2 The top end of the pump shaft 7 passes through the through hole and is fixedly connected to the driving end of the driving motor 1. An impeller 8 is fixedly mounted on the outer wall of the pump shaft 7. A sealing assembly for preventing water inside the pump body 2 from leaking from the through hole is provided on the top wall of the pump body 2. The sealing assembly includes a first sealing bearing 9 rotatably mounted inside the through hole. The pump shaft 7 is inserted into the inner ring of the first sealing bearing 9. The sealing assembly also includes a sealing box 10 fixedly mounted on the outer side of the top wall of the pump body 2 and completely covering the first sealing bearing 9. A sealing cavity 12 is formed between the inner cavity of the sealing box 10 and the outer side of the top wall of the pump body 2. A second sealing bearing 11 matching the pump shaft 7 is provided on the top wall of the sealing box 10 where the pump shaft 7 passes through.
[0029] In the utility model, during use, the pump shaft 7 is driven to rotate by the driving motor 1, and the pump shaft 7 drives the impeller 8 to rotate. The rotation of the impeller 8 can make the water suction port 4 suck water into the pump body 2, and the water sucked into the pump body 2 can be discharged through the discharge port 5;
[0030] By installing the first sealing bearing 9 provided at the connection between the pump body 2 and the pump shaft 7 and the pump shaft 7, it is possible to prevent water inside the pump body 2 from leaking from the connection between the pump body 2 and the pump shaft 7, thereby achieving a certain sealing effect. By adding a sealing box 10 and a second sealing bearing 11 on the outer wall of the pump body 2, the sealing effect of the connection between the pump body 2 and the pump shaft 7 can be further improved, thereby enhancing the overall sealing of the multi-stage pump.
[0031] Furthermore, as a specific implementation of the present invention, the present invention provides a multi-stage pump with high sealing performance.
[0032] Specifically, Figure 4 The sealing box 10 also includes a heating mechanism, which includes a mounting cavity 15 opened on the side wall of the sealing box 10 , and a heating wire 16 is fixedly installed inside the mounting cavity 15 , and the heating wire 16 is electrically connected to the junction box 6 .
[0033] In the utility model, the electric heating wire 16 can be energized through the drain port 5, and the sealing chamber 12 can be heated after the electric heating wire 16 is energized. When the multi-stage pump is working, the water that has penetrated the first sealing bearing 9 can only enter the sealing chamber 12 first, and then evaporated by the high temperature generated by the electric heating wire 16 heating the sealing chamber 12, thereby preventing the water from entering the drive motor 1, thereby enhancing the sealing effect.
[0034] Furthermore, as another specific implementation of the present invention, the present invention provides a multi-stage pump with high sealing performance.
[0035] Specifically, Figure 4 It is shown that an insulation shell 17 is connected to the outer wall of the sealing box 10. The insulation shell 17 is made of insulation cotton. The insulation shell 17 is fixed to the outer wall of the sealing box 10 by bonding.
[0036] In the present invention, the heat-insulating shell 17 is provided to achieve a good heat-insulating effect, so that the heat generated by the electric heating wire 16 can only be transferred to the sealed cavity 12, thereby improving the heating efficiency inside the sealed cavity 12.
[0037] Furthermore, as a specific implementation of the present invention, the present invention provides a multi-stage pump with high sealing performance.
[0038] Specifically, Figure 4 It is shown that a mesh tube 13 is fixedly installed inside the sealing box 10 , the mesh tube 13 is sleeved on the outside of the pump shaft 7 , and a hygroscopic filler 14 is filled between the outer wall of the mesh tube 13 and the inner wall of the sealing box 10 .
[0039] In the utility model, the hygroscopic filler 14 filled in the sealing cavity 12 can absorb the humidity of the air in the sealing cavity 12, thereby preventing excessive moisture in the sealing cavity 12 from forming water mist on the surface of the pump shaft 7, thereby improving the overall sealing performance of the multi-stage pump, and the mesh tube 13 can shield the hygroscopic filler 14, thereby preventing the hygroscopic filler 14 from contacting the outer wall of the pump shaft 7, thereby avoiding the pump shaft 7 from being rubbed by the hygroscopic filler 14, thereby extending the service life of the pump shaft 7.
[0040] Working principle: During use, the pump shaft 7 is driven by the driving motor 1 to rotate, and the pump shaft 7 drives the impeller 8 to rotate. The rotation of the impeller 8 can make the water suction port 4 suck water into the pump body 2, and the water sucked into the pump body 2 can be discharged through the discharge port 5;
[0041] By installing the first sealing bearing 9 provided at the connection between the pump body 2 and the pump shaft 7 and the pump shaft 7, it is possible to prevent water inside the pump body 2 from leaking from the connection between the pump body 2 and the pump shaft 7, thereby achieving a certain sealing effect. By adding a sealing box 10 and a second sealing bearing 11 on the outer wall of the pump body 2, the sealing effect at the connection between the pump body 2 and the pump shaft 7 can be further improved, thereby enhancing the overall sealing of the multi-stage pump. The heating wire 16 can be energized through the drain port 5, and the sealing chamber 12 can be heated after the heating wire 16 is energized. When the multi-stage pump is working, water that has penetrated the first sealing bearing 9 can only enter the sealing chamber 12 first, and then evaporates due to the high temperature generated by the heating wire 16 heating the sealing chamber 12, thereby preventing water from entering the drive motor 1, thereby enhancing the sealing effect.
[0042] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.
Claims
1. A multi-stage pump with high sealing performance, comprising a pump body (2), a driving motor (1) for driving the pump body (2) to operate is fixedly mounted on the top of the pump body (2), and a junction box (6) is arranged on the outer wall of the driving motor (1); characterized in that: The side wall of the lower part of the pump body (2) is provided with a water suction port (4) which is communicated with the interior thereof, and the side wall of the upper part of the pump body (2) is provided with a water discharge port (5) which is communicated with the interior thereof. A pump shaft (7) is rotatably mounted inside the pump body (2). A through hole is provided on the top wall of the pump body (2). The top end of the pump shaft (7) passes through the through hole and is fixedly connected to the driving end of the driving motor (1). An impeller (8) is fixedly mounted on the outer wall of the pump shaft (7). A sealing assembly for preventing water inside the pump body (2) from leaking from the through hole is provided on the top wall of the pump body (2). The sealing assembly comprises a first sealing bearing (9) which is rotatably mounted inside the through hole, and the pump shaft (7) is plugged into the inner ring of the first sealing bearing (9).
2. A high-sealing multi-stage pump according to claim 1, characterized in that: The sealing assembly further comprises a sealing box (10) fixedly mounted on the outer side of the top wall of the pump body (2) and completely covering the first sealing bearing (9); a sealing cavity (12) is formed between the inner cavity of the sealing box (10) and the outer side of the top wall of the pump body (2); and a second sealing bearing (11) matching the pump shaft (7) is provided at a position on the top wall of the sealing box (10) where the pump shaft (7) penetrates.
3. A high-sealing multi-stage pump according to claim 1, characterized in that: It also includes a heating mechanism disposed on the sealing box (10), the heating mechanism including an installation cavity (15) opened on the side wall of the sealing box (10), an electric heating wire (16) fixedly installed inside the installation cavity (15), and the electric heating wire (16) is electrically connected to the junction box (6).
4. A high-sealing multi-stage pump according to claim 3, characterized in that: An insulation shell (17) is connected to the outer wall of the sealing box (10); the insulation shell (17) is made of insulation cotton; and the insulation shell (17) is fixed to the outer wall of the sealing box (10) by bonding.
5. A multi-stage pump with high sealing performance according to claim 2, characterized in that: A mesh cylinder (13) is fixedly installed inside the sealing box (10), the mesh cylinder (13) is sleeved on the outside of the pump shaft (7), and a hygroscopic filler (14) is filled between the outer wall of the mesh cylinder (13) and the inner wall of the sealing box (10).
6. A high-sealing multi-stage pump according to claim 1, characterized in that: A mounting plate (3) is fixedly connected to the bottom wall of the pump body (2), and a plurality of mounting holes are provided on the mounting plate (3), wherein the plurality of mounting holes are distributed at the four corners of the mounting plate (3).