Submerged pump water retaining structure

Abstract

The utility model relates to a submerged pump water retaining structure, including sealing device and overflow, submerged pump includes setting motor above liquid level, centrifugal pump below liquid level and the support pipe of connecting motor and centrifugal pump, transmission shaft is connected in the support pipe and set up motor and centrifugal pump, the sealing device is set on transmission shaft, and the sealing device fills the clearance between transmission shaft and support pipe, the overflow is set up on the support pipe on the side of sealing device close to motor, and the overflow is set up above liquid level, the utility model discloses a sealing device is set up in the support pipe and is equipped with the overflow, improves the sealing performance of submerged pump, reduces medium leakage, avoids the service life of medium influence bearing device.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump technology, and in particular to a water-blocking structure for a submersible pump. Background Technology

[0002] Submersible pumps have a pump body that extends below the liquid surface to pump the medium, allowing them to be directly installed on the storage container of the material being transported, and there is no risk of leakage from the pump body itself.

[0003] However, the motor driving the hydraulic pump needs to be positioned above the liquid level, and the motor is connected to the pump body via a drive shaft. During the operation of the submersible pump, the medium can easily seep into the motor location along the drive shaft between the pump body and the motor, leading to medium leakage and even damage to the bearing assembly, thus affecting the service life of the submersible pump.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a water-blocking structure for submersible pumps to improve the sealing performance of submersible pumps.

[0006] The technical solution of this utility model is as follows: The submersible pump's water-blocking structure includes a sealing device and an overflow port. The submersible pump comprises a motor positioned above the liquid surface, a centrifugal pump positioned below the liquid surface, and a support pipe connecting the motor and the centrifugal pump. A drive shaft is housed within the support pipe, connecting the motor and the centrifugal pump. The sealing device is fitted onto the drive shaft, filling the gap between the drive shaft and the support pipe. The overflow port is located on the support pipe near the motor side of the sealing device, above the liquid surface.

[0007] A further technical solution is that the sealing device uses an elastic material.

[0008] A further technical solution is that the sealing device includes an annular sealing body and an annular sealing lip. The sealing body extends to one side that contacts the drive shaft or support tube, and the sealing lip is provided therefrom.

[0009] A further technical solution involves installing a baffle plate fitted onto the drive shaft inside the support tube. A sealing groove is formed on the side of the baffle plate facing the drive shaft. A sealing device is installed within the sealing groove.

[0010] A further technical solution involves evenly distributing at least two overflow outlets around the axis of the support pipe in a circumferential direction. All overflow outlets are on the same plane.

[0011] A further technical solution involves installing a base plate between the motor and the support tube. Around the axis of the support tube, the outer contour of the base plate is larger than the outer contours of the motor and the support tube.

[0012] A further technical solution involves connecting a water outlet pipe to the outlet of the centrifugal pump. The water outlet pipe passes through the base plate and extends beyond the liquid surface.

[0013] A further technical solution involves installing a filter screen at the inlet of the centrifugal pump. The filter screen is made of an elastic material.

[0014] A further technical solution involves installing a coupling between the motor and the support tube.

[0015] The beneficial technical effects of this utility model are as follows: (1) The submersible pump water-blocking structure of this utility model has a sealing device sleeved on the drive shaft inside the support pipe. When the centrifugal pump is working, the medium flowing along the drive shaft will be blocked by the sealing device, reducing the flow of medium along the drive shaft towards the motor. In addition, an overflow port is also provided on the support pipe near the motor side of the sealing device, and the overflow port is located above the liquid surface. Some of the medium that passes the sealing device and continues to flow towards the motor can be discharged from the support pipe through the overflow port after flowing to the overflow port, preventing the medium from immersing in the motor position. The sealing device and the overflow port work together to improve the sealing performance of the submersible pump, reduce medium leakage, and prevent the medium from affecting the service life of the bearing device.

[0016] (2) Furthermore, a sealing lip is provided on the sealing body of the elastic material. By utilizing the elasticity of the sealing lip, when the sealing body is fitted on the drive shaft, the sealing lip can swing around the sealing body to fit tightly against the drive shaft, thereby blocking the flow of the medium along the drive shaft and ensuring the sealing performance of the sealing device.

[0017] (3) Furthermore, a baffle plate is also provided inside the support tube. The baffle plate limits the sealing device through the sealing groove to fix the sealing device, so as to avoid the sealing device from shifting and affecting the fit between it and the drive shaft, and further ensure the sealing performance. Attached Figure Description

[0018] Figure 1 A schematic diagram of a submersible pump water-blocking structure according to an embodiment of the present disclosure is shown in the front view.

[0019] Figure 2 A partially enlarged view of the submersible pump baffle structure at point A, according to an embodiment of the present disclosure, is shown.

[0020] Marked in the attached diagram: 1. Motor; 11. Coupling; 2. Base plate; 3. Support pipe; 31. Overflow port; 32. Sealing device; 321. Sealing body; 322. Sealing lip; 33. Water baffle; 331. Sealing groove; 34. Drive shaft; 4. Centrifugal pump; 41. Filter screen; 5. Water outlet pipe; 6. Storage tank; 61. Opening. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0022] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Figure 1 A schematic diagram of a submersible pump water-blocking structure according to an embodiment of the present disclosure is shown in the front view. Figure 2 A partially enlarged view of the submersible pump baffle structure at point A, according to an embodiment of this disclosure, is shown. Please refer to... Figure 1 and Figure 2The submersible pump's water-blocking structure includes a sealing device 32 and an overflow port 31. The submersible pump includes a motor 1 positioned above the liquid surface, a centrifugal pump 4 positioned below the liquid surface, and a support pipe 3 connecting the motor 1 and the centrifugal pump 4. During operation, the motor 1 drives the impeller (not shown in the figure) inside the centrifugal pump 4 to rotate and pump the medium. A drive shaft 34 is installed inside the support pipe 3, connecting the motor 1 and the impeller inside the centrifugal pump 4. The sealing device 32 is fitted onto the drive shaft 34, filling the gap between the drive shaft 34 and the support pipe 3. When the centrifugal pump 4 is operating, the medium flowing along the drive shaft 34 is obstructed by the sealing device 32, reducing the flow of medium towards the motor 1 along the drive shaft 34. The overflow port 31 is located on the support pipe 3 on the side of the sealing device 32 closest to the motor 1, above the liquid surface. Medium that has passed the sealing device 32 and continues to flow towards the motor 1 can be discharged from the support pipe 3 through the overflow port 31, preventing the medium from entering the motor 1. The sealing device 32 and the overflow port 31 work together to improve the sealing performance of the submersible pump, reduce media leakage, prevent the media from affecting the bearing device (not shown in the figure) of the motor position, and extend the service life of the submersible pump.

[0024] Please refer to Figure 1 and Figure 2 The sealing device 32 can be made of elastic materials such as nitrile rubber or fluororubber. Utilizing the elasticity of the elastic material, the sealing device 32 can be fitted to the drive shaft 34 to block the flow of the medium along the drive shaft 34.

[0025] Preferably, the sealing device 32 includes an annular sealing body 321 and an annular sealing lip 322. The sealing body 321 contacts the side of the drive shaft 34 or the support tube 3, and the sealing lip 322 extends outward. Utilizing the elasticity of the sealing lip 322, when the sealing body 321 is fitted onto the drive shaft 34, the sealing lip 322 can swing around the sealing body 321 to tightly fit the drive shaft 34, thereby blocking the flow of the medium along the drive shaft 34 and ensuring the sealing performance of the sealing device 32.

[0026] Please refer to Figure 1 and Figure 2 Inside the support tube 3, a baffle plate 33 is also provided, which is sleeved on the drive shaft 34. A sealing groove 331 is formed on the side of the baffle plate 33 facing the drive shaft 34. A sealing device 32 is disposed within the sealing groove 331. The baffle plate 33 limits the sealing device 32 through the sealing groove 331, thereby fixing the sealing device 32 and preventing it from shifting and affecting the fit between the sealing device 32 and the drive shaft 34, further ensuring sealing performance. In some embodiments, the baffle plate 33 is fixedly connected to the inner wall of the support tube 3, and a gap is left between the baffle plate 33 and the drive shaft 34 to avoid interfering with the rotation of the drive shaft 34. The baffle plate 33 and the support tube 3 can be connected by welding.

[0027] Preferably, at least two overflow ports 31 are evenly distributed around the axis of the support pipe 3 in the circumferential direction. All overflow ports 31 are on the same plane to facilitate the flow of the medium inside the support pipe 3 out of the support pipe 3 along the overflow ports 31.

[0028] Please refer to Figure 1 and Figure 2 A base plate 2 is installed between the motor 1 and the support tube 3. The outer contour of the base plate 2 is larger than the outer contours of the motor 1 and the support tube 3 around the axis of the support tube 3, to facilitate support of the motor 1 and the support tube 3. Specifically, the submersible pump is mounted on the storage tank 6. An opening 61 is provided on the storage tank 6, and the support tube 3 extends into the storage tank 6 along the opening 61. The base plate 2 is positioned on the storage tank 6 at the location of the opening 61 to fix the motor 1 at the opening 61 of the storage tank 6, preventing the motor 1 from falling into the storage tank 6.

[0029] Preferably, the outlet of the centrifugal pump 4 is connected to the outlet pipe 5. The outlet pipe 5 passes through the bottom plate 2 and extends out of the liquid surface. After the motor 1 drives the centrifugal pump 4, the centrifugal pump 4 pumps the medium from the storage tank 6 along the outlet pipe 5. A filter screen 41 is installed at the water inlet (not shown in the figure) of the centrifugal pump 4. The filter screen 41 filters impurities in the medium entering the centrifugal pump 4, preventing impurities from entering the centrifugal pump 4 and causing malfunctions.

[0030] More preferably, a coupling 11 is provided between the motor 1 and the support tube 3. The coupling compensates for the installation deviation between the motor 1 and the support tube 3, and can also buffer vibration and impact, protect the motor 1 and extend its service life.

[0031] The specific working process of the water-blocking structure of this utility model is as follows: When the submersible pump is working, the motor 1 starts, driving the impeller inside the centrifugal pump 4 to rotate along the coupling 11 and the drive shaft 34. The centrifugal pump 4 pumps the medium from the storage tank 6 and discharges it along the outlet pipe 5. When the centrifugal pump 4 is working, some of the medium enters the support pipe 3 along the connection between the drive shaft 34 and the centrifugal pump 4, and continues to flow along the drive shaft 34 towards the motor 1. When the medium flowing along the drive shaft 34 reaches the sealing device 32, the sealing lip 322 adheres to the drive shaft 34, and the sealing body 321 adheres to the baffle plate 33. The baffle plate 33 seals the connection to the support pipe 3, blocking part of the medium flowing along the drive shaft 34. The medium that has passed the sealing device 32 continues to flow along the drive shaft 34 and the support pipe 3 towards the motor 1 until it reaches the overflow port 31. The medium flowing to the overflow port 31 flows out of the support pipe 3 along the overflow port 31, preventing the medium from entering and affecting the bearing device between the base plate 2 and the coupling 11.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A water-blocking structure for a submersible pump, characterized in that, The submersible pump's water-blocking structure includes a sealing device and an overflow port; the submersible pump includes a motor disposed above the liquid surface, a centrifugal pump disposed below the liquid surface, and a support pipe connecting the motor and the centrifugal pump; a drive shaft is disposed inside the support pipe to connect the motor and the centrifugal pump; the sealing device is sleeved on the drive shaft and fills the gap between the drive shaft and the support pipe; the overflow port is opened on the support pipe on the side of the sealing device near the motor, and the overflow port is opened above the liquid surface.

2. The submersible pump water-blocking structure as described in claim 1, characterized in that: The sealing device is made of an elastic material.

3. The submersible pump water-blocking structure as described in claim 2, characterized in that: The sealing device includes an annular sealing body and an annular sealing lip; the sealing lip extends from one side of the sealing body that contacts the drive shaft or the support tube.

4. The submersible pump water-blocking structure as described in claim 1, characterized in that: Inside the support tube, a baffle plate is also provided and sleeved on the drive shaft; a sealing groove is opened on the side of the baffle plate facing the drive shaft; the sealing device is provided in the sealing groove.

5. The submersible pump water-blocking structure as described in claim 1, characterized in that: Around the axis of the support pipe, at least two overflow outlets are evenly opened circumferentially on the support pipe; all the overflow outlets are on the same plane.

6. The submersible pump water-blocking structure as described in claim 1, characterized in that: A base plate is provided between the motor and the support tube; the outer contour of the base plate is larger than the outer contour of the motor and the support tube around the axis of the support tube.

7. The submersible pump water-blocking structure as described in claim 6, characterized in that: The outlet of the centrifugal pump is connected to a water outlet pipe; the water outlet pipe passes through the base plate and extends out of the liquid surface.

8. The submersible pump water-blocking structure as described in claim 1, characterized in that: A filter screen is installed at the water inlet of the centrifugal pump; the filter screen is made of elastic material.

9. The submersible pump water-blocking structure as described in claim 1, characterized in that: A coupling is provided between the motor and the support tube.

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