Anti-cavitation impeller device of fluid centrifugal pump

Abstract

The utility model relates to the field of centrifugal pumps, in particular to an anti-cavitation impeller device of a fluid centrifugal pump. The utility model provides an anti-cavitation impeller device of a fluid centrifugal pump, which can adjust the inlet pressure of a connecting frame and avoid the cavitation phenomenon. An anti-cavitation impeller device of a fluid centrifugal pump comprises a connecting frame, a liquid outlet pipe, an impeller, a connecting shaft and a prevention mechanism, the liquid outlet pipe is connected to the upper side of the connecting frame, the connecting shaft is rotatably connected to the right portion of the connecting frame, the impeller is connected to the left side of the connecting shaft and located in the connecting frame, and the prevention mechanism capable of adjusting inlet pressure is arranged on the connecting frame. When the pressure displayed on the pressure gauge is too high or too low, the air pump on the fixing frame is started, air in the connecting pipe is pumped out or pumped into the connecting pipe, the pressure in the connecting pipe is adjusted, and the effects that the inlet pressure of the connecting frame can be adjusted, and the cavitation phenomenon is avoided are achieved.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to an anti-cavitation impeller device of a fluid centrifugal pump. Background Art

[0002] The centrifugal pump works by rotating the impeller to make the water centrifugal. Before starting the water pump, the pump housing and the water suction pipe must be filled with water, and then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump housing. However, when the inlet pressure of the existing centrifugal pump is lower than the saturated vapor pressure of the liquid at the ambient temperature, cavitation is prone to occur, resulting in damage to the blades and vibration, which is inconvenient.

[0003] Therefore, a fluid centrifugal pump anti-cavitation impeller device has been developed that can adjust the inlet pressure of the connecting frame to avoid the occurrence of cavitation. Utility Model Content

[0004] In order to overcome the disadvantages of existing centrifugal pumps that cavitation is prone to occur when the inlet pressure is lower than the saturated vapor pressure of the liquid at ambient temperature, resulting in damage to the blades and vibration, which is relatively inconvenient, the utility model provides an anti-cavitation impeller device for a fluid centrifugal pump that can adjust the inlet pressure of a connecting frame to avoid the occurrence of cavitation.

[0005] The technical implementation scheme of the utility model is: an anti-cavitation impeller device for a fluid centrifugal pump, comprising a connecting frame, a liquid outlet pipe, an impeller, a connecting shaft and a prevention mechanism, wherein the upper side of the connecting frame is connected to the liquid outlet pipe, the right side of the connecting frame is rotatably connected to the connecting shaft, the left side of the connecting shaft is connected to the impeller, the impeller is located inside the connecting frame, and the connecting frame is provided with a prevention mechanism capable of adjusting the inlet pressure.

[0006] More preferably, the prevention mechanism includes a connecting pipe, a pressure gauge, a fixing bracket, an air pump and a one-way valve, the connecting pipe is located on the left side of the connecting bracket, the pressure gauge is connected to the upper rear side of the connecting pipe, the fixing bracket is connected to the upper front side of the connecting pipe, the air pump is connected to the fixing bracket, the one-way valve is connected to the front side of the connecting pipe, and the air pump air pipe is connected to the one-way valve.

[0007] More preferably, a pointer is provided on the pressure gauge.

[0008] More preferably, it also includes a disassembly and assembly mechanism, which includes a guide rod, a blocking block and a pressure spring. Multiple guide rods are connected to the outer side of the right part of the connecting tube, and a blocking block is slidably connected between two adjacent guide rods. A pressure spring is connected between the guide rods and the connected blocking blocks.

[0009] More preferably, the blocking block is a U-shaped structure.

[0010] More preferably, a rotating frame is further included, and the right part of the connecting pipe is rotatably connected to the rotating frame.

[0011] The beneficial effects of the utility model are as follows: 1. When the pressure displayed on the pressure gauge is too high or too low, the utility model starts the air pump on the fixed frame to extract the gas in the connecting pipe or pump the gas into the connecting pipe to adjust the pressure in the connecting pipe, thereby achieving the effect of being able to adjust the inlet pressure of the connecting frame and avoiding the occurrence of cavitation.

[0012] 2. The utility model connects the connecting pipe to the liquid outlet pipe through the positioning block. When the connecting pipe needs to be removed, the rotating frame is rotated and adjusted to make the rotating frame squeeze the positioning block to move outward, thereby achieving the effect of being able to quickly disassemble and assemble the connecting pipe and improving the convenience of using the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0014] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model.

[0015] Figure 3 It is a partial three-dimensional structural diagram of the prevention mechanism of the utility model.

[0016] Figure 4 It is a partial three-dimensional structural schematic diagram of the disassembly and assembly mechanism of the utility model.

[0017] The meanings of the reference numerals in the figure are: 1_connecting frame, 2_liquid outlet pipe, 3_impeller, 4_connecting shaft, 5_preventive mechanism, 51_connecting pipe, 52_pressure gauge, 53_fixed frame, 54_air pump, 55_check valve, 6_disassembly and assembly mechanism, 61_guide rod, 62_positioning block, 63_pressure spring, 64_rotating frame. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] A fluid centrifugal pump anti-cavitation impeller device, such as Figure 1 and Figure 2 As shown, it includes a connecting frame 1, a liquid outlet pipe 2, an impeller 3, a connecting shaft 4 and a preventive mechanism 5. The liquid outlet pipe 2 is connected to the upper side of the connecting frame 1, the right part of the connecting frame 1 is rotatably connected to the connecting shaft 4, the left side of the connecting shaft 4 is connected to the impeller 3, the impeller 3 is located inside the connecting frame 1, and the preventive mechanism 5 is provided on the connecting frame 1.

[0020] like Figure 1 and Figure 3As shown, the prevention mechanism 5 includes a connecting pipe 51, a pressure gauge 52, a fixing frame 53, an air pump 54 and a one-way valve 55. The connecting pipe 51 is located on the left side of the connecting frame 1. The pressure gauge 52 is connected to the upper rear side of the connecting pipe 51. The pressure gauge 52 is provided with a pointer for displaying the pressure value. The upper front side of the connecting pipe 51 is connected to the fixing frame 53. The fixing frame 53 is connected to the air pump 54. The front side of the connecting pipe 51 is connected to the one-way valve 55. The air pipe of the air pump 54 is connected to the one-way valve 55.

[0021] When using the utility model, firstly, the connecting frame 1 is installed on the pipeline, and the liquid outlet pipe 2 is connected to another section of the pipeline so that the fluid in the pipeline flows into the connecting frame 1 from the left side, and then the connecting shaft 4 is connected to the motor, and the motor is started to drive the impeller 3 to rotate, so that the fluid flows out of the liquid outlet pipe 2 to another pipeline. When the connecting frame 1 is installed on the pipeline, the connecting pipe 51 can be first connected to the left side of the liquid outlet pipe 2, and then the connecting pipe 51 is connected to the pipeline so that the fluid flows into the connecting pipe 51. The pressure gauge 52 detects the pressure in the connecting pipe 51. When the pressure displayed on the pressure gauge 52 is too high or too low, the air pump 54 on the fixing frame 53 is started to extract the gas in the connecting pipe 51 or to draw gas into the connecting pipe 51 to adjust the pressure in the connecting pipe 51. The one-way valve 55 is used to prevent the fluid from flowing out, thereby playing a role in being able to adjust the inlet pressure of the connecting frame 1 and avoiding the occurrence of cavitation.

[0022] like Figure 1 and Figure 4 As shown, it also includes a disassembly and assembly mechanism 6, which includes a guide rod 61, a blocking block 62, a pressure spring 63 and a rotating frame 64. Eight guide rods 61 are connected to the outer side of the right part of the connecting tube 51, and a blocking block 62 is slidably connected between two adjacent guide rods 61. The blocking block 62 is a U-shaped structure for easy positioning. Pressure springs 63 are connected between the guide rods 61 and the connected blocking blocks 62, and the right part of the connecting tube 51 is rotatably connected to the rotating frame 64.

[0023] By using the disassembly and assembly mechanism 6 of the present device, the connecting tube 51 can be quickly disassembled and assembled. When the connecting tube 51 is connected to the left side of the liquid outlet pipe 2, the blocking block 62 is pulled to move outward on the guide rod 61, and the pressure spring 63 is squeezed and contracted, and then the connecting tube 51 and the liquid outlet pipe 2 are docked. Thereafter, the blocking block 62 is released to allow the pressure spring 63 to rebound, driving the blocking block 62 to reset, so that the blocking block 62 connects the connecting tube 51 with the liquid outlet pipe 2. When the connecting tube 51 needs to be removed, the rotating frame 64 is rotated and adjusted to allow the rotating frame 64 to squeeze the blocking block 62 to move outward, thereby achieving the effect of being able to quickly disassemble and assemble the connecting tube 51 and improving the convenience of using the connecting tube 51.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-cavitation impeller device for a fluid centrifugal pump, characterized in that: The invention comprises a connecting frame (1), a liquid outlet pipe (2), an impeller (3), a connecting shaft (4) and a preventive mechanism (5); the upper side of the connecting frame (1) is connected to the liquid outlet pipe (2); the right side of the connecting frame (1) is rotatably connected to the connecting shaft (4); the left side of the connecting shaft (4) is connected to the impeller (3); the impeller (3) is located inside the connecting frame (1); and the connecting frame (1) is provided with a preventive mechanism (5) capable of adjusting the inlet pressure.

2. The anti-cavitation impeller device for a fluid centrifugal pump according to claim 1, characterized in that: The prevention mechanism (5) comprises a connecting pipe (51), a pressure gauge (52), a fixing frame (53), an air pump (54) and a one-way valve (55). The connecting pipe (51) is located on the left side of the connecting frame (1). The upper rear side of the connecting pipe (51) is connected to the pressure gauge (52). The upper front side of the connecting pipe (51) is connected to the fixing frame (53). The fixing frame (53) is connected to the air pump (54). The front side of the connecting pipe (51) is connected to the one-way valve (55). The air pipe of the air pump (54) is connected to the one-way valve (55).

3. The anti-cavitation impeller device for a fluid centrifugal pump according to claim 2, characterized in that: The pressure gauge (52) is provided with a pointer.

4. The anti-cavitation impeller device for a fluid centrifugal pump according to claim 2, characterized in that: The device also comprises a disassembly and assembly mechanism (6), which comprises a guide rod (61), a blocking block (62) and a pressure spring (63). A plurality of guide rods (61) are connected to the outer side of the right portion of the connecting tube (51), a blocking block (62) is slidably connected between two adjacent guide rods (61), and a pressure spring (63) is connected between each guide rod (61) and the connected blocking block (62).

5. The anti-cavitation impeller device for a fluid centrifugal pump according to claim 4, characterized in that: The positioning block (62) is a U-shaped structure.

6. The anti-cavitation impeller device for a fluid centrifugal pump according to claim 4, characterized in that: It also includes a rotating frame (64), and the right part of the connecting pipe (51) is rotatably connected to the rotating frame (64).

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