Pressure relief device for submerged silt pump

Abstract

The utility model provides a pressure relief device for a submerged silt pump, which comprises a pump body, the pump body comprises a pump cover and an impeller, the impeller is covered by the pump cover, and a pump shaft of the impeller is connected with a driving motor; a through hole is formed in the pump cover and used for pressure relief. And the through hole is conical. A supporting plate is arranged in the through hole, a plurality of micro holes are formed in the supporting plate so that water can pass through the micro holes, a connecting rod is arranged on the supporting plate, and a top base is arranged on the connecting rod. A lower opening is formed in the bottom end of the top cap, the top cap surrounds the top seat, the top cap is arranged on the connecting rod in a sleeving mode, and the size of the lower opening is smaller than that of the top seat. According to the pressure relief device for the submerged silt pump, even if the oil seal of the pump cover is abraded after long-time operation, water in the pump cover can be discharged through the through hole, and local pressure cannot be generated, so that the bearing body is protected, and the service life of the silt pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a pressure relief device for a submerged sediment pump. Background Art

[0002] Submersible slurry pumps are used to extract slurry from underwater and are widely used in mining, civil engineering, environmental protection and other fields. Figure 1 The figure shows the structure of a submersible slurry pump. The pump body 2 is arranged on the base 1. The pump cover 4 covers the impeller 3. The pumped slurry is discharged from the outlet 5. When in use, the pump body 2 is located below the liquid surface, while the drive motor is located above the liquid surface. Therefore, the pump shaft connects the impeller 3 and the drive motor. In order to ensure the normal operation of the pump body 2, a series of sealing settings must be made on the pump shaft, such as Figure 1 The sealing body 6 and the bearing body 7 in it.

[0003] After the submersible sand pump has been running for a long time, the oil seal at the pump cover 4 will wear out. Due to the high pressure inside the pump cover, the water in the pump cover will go up and even enter the seal body 6 and the bearing body 7, causing bearing damage and affecting the normal operation of the pump body.

[0004] The utility model provides a pressure relief device for a submerged sediment pump, attempting to solve the problem of bearing damage caused by water surging in a pump cover. Utility Model Content

[0005] The utility model provides a pressure relief device for a submerged sediment pump, attempting to solve the problem of bearing damage caused by water surging in a pump cover.

[0006] The utility model provides a pressure relief device for a submerged sediment pump, comprising a pump body, wherein the pump body comprises a pump cover and an impeller, the pump cover covers the impeller, the pump shaft of the impeller is connected to a drive motor, the pump body runs below the liquid level, and the drive motor runs above the liquid level; wherein a through hole is opened on the pump cover for pressure relief.

[0007] Furthermore, the through hole is conical, wherein the end of the cone with a larger aperture is close to the impeller, and the end of the cone with a smaller aperture is far away from the impeller.

[0008] Furthermore, a support plate is arranged in the through hole, a plurality of micro holes are arranged on the support plate for water to pass through, a connecting rod is arranged on the support plate, and a top seat is arranged on the connecting rod.

[0009] Furthermore, the pressure relief device for the submersible sediment pump also includes a top cap, the bottom end of the top cap is provided with a lower opening, the top cap surrounds the top seat, the top cap is sleeved on the connecting rod, and the size of the lower opening is smaller than the size of the top seat.

[0010] Furthermore, the top cap and the top seat are connected to each other via a spring.

[0011] The utility model provides a pressure relief device for a submerged silt pump. Even if the pump cover oil seal is worn after long-term operation, water in the pump cover will be discharged through the through hole without generating local pressure, thereby protecting the bearing body and extending the service life of the silt pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shown is a schematic diagram of the general structure of a submersible sludge pump.

[0013] Figure 2 Shown is a schematic diagram of a through hole on a pump cover according to an embodiment of the utility model.

[0014] Reference numerals:

[0015] 1: base; 2: pump body; 3: impeller; 4: pump cover; 5: water outlet; 6: sealing body; 7: bearing body; 8: sealing assembly; 9: mechanical seal; 10: middle body; 11: motor base; 12: bearing; 13: pump coupling; 41: through hole; 42: support plate; 43: connecting rod; 44: top cap; 45: top seat; 46: lower opening. DETAILED DESCRIPTION

[0016] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0017] Figure 2 The figure shows a schematic diagram of a through hole on a pump cover of an embodiment of the utility model. In the embodiment of the utility model, a through hole 41 is provided on the pump cover 4. After a long period of operation, the oil seal of the pump cover is worn. At this time, the water in the pump cover can be discharged through the through hole 41 without generating local pressure and rushing to the bearing body, thereby protecting the bearing body and extending the service life of the silt pump.

[0018] Further, such as Figure 2 As shown, the through hole 41 can be set to a cone, such as a circular cone, wherein the end with a larger aperture of the cone is close to the impeller 3, and the end with a smaller aperture of the cone is away from the impeller 3, that is, the large hole end of the through hole 41 faces the inside of the pump cover, and the small hole end of the through hole 41 faces the outside of the pump cover. This design is to hope that when the pump cover 4 releases pressure, the tapered through hole 41 can play a certain role in regulation and blocking, so that pressure relief is only performed when the internal and external pressure difference reaches a certain level.

[0019] Further, such as Figure 2As shown, a support plate 42 is arranged in the through hole 41, and a plurality of micropores are arranged on the support plate 42 for water to pass through. A connecting rod 43 is arranged on the support plate 42, and a top seat 45 is arranged on the connecting rod 43. A lower opening 46 is arranged at the bottom end of the top cap 44, and the top cap 44 surrounds the top seat 45, and the top cap 44 is sleeved on the connecting rod 43. When the internal and external pressure difference reaches a certain level, the pressure will push the top cap 44 open, and the pressure will be released from the lower opening 46; when the pressure difference is higher, the top cap 44 will also be pushed higher, and the pressure will be released faster from the lower opening 46. The size of the lower opening 46 is smaller than that of the top seat 45, so that the top cap 44 will not be separated from the connecting rod 43.

[0020] Furthermore, the top cap 44 can be connected to the top seat 45 through a spring. In this way, due to the limitation of the spring, the pressure difference between the inside and the outside has to overcome the spring tension and the gravity of the top cap 44 to achieve pressure relief, which plays a certain regulating role in pressure relief.

[0021] The utility model provides a pressure relief device for a submerged silt pump. Even if the pump cover oil seal is worn after long-term operation, water in the pump cover will be discharged through the through hole without generating local pressure, thereby protecting the bearing body and extending the service life of the silt pump.

[0022] In the description of the present invention, it is necessary to understand that the terms “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” orientations or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A pressure relief device for a submerged sediment pump, comprising a pump body, the pump body comprising a pump cover and an impeller, the pump cover covers the impeller, the pump shaft of the impeller is connected to a drive motor, the pump body runs below the liquid level, and the drive motor runs above the liquid level; It is characterized in that A through hole is provided on the pump cover for pressure relief, the through hole is conical, wherein the end of the conical hole with a larger diameter is close to the impeller, and the end of the conical hole with a smaller diameter is far away from the impeller, a support plate is provided in the through hole, a plurality of micro-holes are provided on the support plate for water to pass through, a connecting rod is provided on the support plate, and a top seat is provided on the connecting rod; The pressure relief device for the submersible sediment pump also includes a top cap, a bottom end of which is provided with a lower opening, the top cap surrounds the top seat, the top cap is sleeved on the connecting rod, and the size of the lower opening is smaller than the size of the top seat.

2. The pressure relief device for a submersible sediment pump according to claim 1, characterized in that: The top cap and the top seat are connected to each other through a spring.

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