Back vane rotary vane type impeller for self-suction centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a back vane rotary vane type impeller for a self-suction centrifugal pump, which comprises an impeller body, separation rotary vanes and a pipeline assembly, a pump body shell is arranged on the outer side of the impeller body, the pipeline assembly is arranged on the outer side of the pump body shell, and a mounting seat is arranged on the back of the impeller body. Separation rotary vanes are arranged on the inner side of the installation base, an exhaust water suction bin is arranged on the back face of the impeller body, the exhaust water suction bin and the pump body shell are eccentrically arranged, and a driving shaft is arranged on the back face of the impeller body. The mounting seat and the separation rotary vane are arranged on the back face of the impeller body, and the exhaust and water absorption bin is eccentrically arranged outside the mounting seat, so that the impeller body drives the mounting seat and the separation rotary vane to rotate when rotating, and the separation rotary vane, the exhaust and water absorption bin and the mounting seat form periodic change of space volume. And air in the pump body shell is sucked into the exhaust water suction bin and discharged, so that the pump body shell is gradually filled with water, and the condition that the impeller body can be used for centrifugal pumping is met.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and in particular to a back-blade rotary vane impeller for a self-priming centrifugal pump. Background Technology

[0002] Centrifugal pumps are devices that use centrifugal force to transport liquids. They are commonly used to transport water, oil, and slurry, and to pressurize the transport process to increase the transport distance. Some centrifugal pumps can control the pressure and flow rate of the transport.

[0003] A centrifugal pump is generally composed of an impeller, a pump casing, a shaft seal device, and bearings. When it is working, an external motor drives the impeller to rotate at high speed, and the liquid rotates with the impeller to gain huge kinetic energy. The liquid undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's pressure pipeline through the flow channel of the volute pump casing.

[0004] Most centrifugal pumps require filling the pump chamber with water before each start-up. The water is thrown outwards under centrifugal force. When there is air in the pump chamber, conventional blades cannot effectively remove the air, resulting in dry running. The usual solution is to mix the gas and liquid, such as internal or external mixing. However, this solution requires an external iron tank so that the gas and liquid can be separated by gravity, which greatly increases the cost and is extremely inefficient. Furthermore, because the water volume is limited, the amount of air pumped is also limited. Utility Model Content

[0005] To overcome the problem that most centrifugal pumps need to be filled with water before each start-up, and the water is thrown outward under the action of centrifugal force, conventional blades cannot effectively remove the air when there is air in the pump chamber, thus causing dry running.

[0006] The technical solution of this utility model is as follows: a self-priming centrifugal pump with a back-blade rotary vane impeller, comprising an impeller body, a partition vane, and a pipeline assembly. A pump housing is provided on the outer side of the impeller body, and a pipeline assembly is provided on the outer side of the pump housing. A mounting base is provided on the back of the impeller body, and the impeller body and the mounting base are integrally fixedly connected. A partition vane is provided on the inner side of the mounting base, and the partition vane is slidably connected to the mounting base. An exhaust and suction chamber is provided on the back of the impeller body, and the exhaust and suction chamber is eccentrically positioned with respect to the pump housing. The exhaust and suction chamber is fixedly connected to the pump housing. A drive shaft is provided on the back of the impeller body.

[0007] Preferably, the piping assembly includes an inlet pipe and an outlet pipe, with the inlet pipe located at the center of the front of the pump housing and the outlet pipe located at the edge of the pump housing.

[0008] Preferably, an exhaust port is provided on the back of the pump body casing, and the exhaust port is located in the space formed by the exhaust and water suction chamber and the mounting base.

[0009] Preferably, the exhaust water intake chamber has a connecting hole, which is located in the space formed by the exhaust water intake chamber and the mounting base.

[0010] Preferably, the vent and the connecting hole are located away from each other and in the space on both sides of the mounting base.

[0011] Preferably, an installation seam is provided at the connection between the mounting base and the separator plate, the depth of the installation seam is greater than the length of the separator plate, and the line connecting the two sets of installation seams passes through the diameter of the separator plate.

[0012] Preferably, a spring is provided in the installation gap, with both ends of the spring being fixedly connected to the separator plate and the mounting base, respectively.

[0013] The beneficial effects of this utility model are:

[0014] By setting a mounting base and partition vanes on the back of the impeller body, and setting an exhaust and water intake chamber eccentrically outside the mounting base, the impeller body drives the mounting base and partition vanes to rotate when it rotates. The periodic change in the spatial volume formed by the partition vanes, exhaust and water intake chamber and mounting base draws air from the pump body shell into the exhaust and water intake chamber and discharges it, so that the pump body shell gradually fills with water and reaches the condition that the impeller body can be used for centrifugal pumping. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0016] Figure 2 The diagram shown is a three-dimensional structural schematic of the pump body shell of this utility model;

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the impeller body of this utility model;

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the exhaust and water intake chamber of this utility model.

[0019] Figure 5 The diagram shown is a three-dimensional structural schematic of the separator blade of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Impeller body; 2. Pump housing; 3. Exhaust and suction chamber; 4. Drive shaft; 5. Mounting base; 6. Dividing vane; 7. Spring; 201. Inlet pipe; 202. Outlet pipe; 203. Exhaust port; 301. Connecting hole; 501. Mounting seam. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-5This utility model provides an embodiment of a self-priming centrifugal pump with a back-blade rotary vane impeller, comprising an impeller body 1, partition vanes 6, and a pipeline assembly. A pump housing 2 is disposed on the outer side of the impeller body 1, and the pipeline assembly is disposed on the outer side of the pump housing 2. A mounting base 5 is disposed on the back of the impeller body 1, and the impeller body 1 and the mounting base 5 are integrally fixedly connected. A partition vane 6 is disposed on the inner side of the mounting base 5, and the partition vane 6 is slidably connected to the mounting base 5. An exhaust and suction chamber 3 is disposed on the back of the impeller body 1, and the exhaust and suction chamber 3 is eccentrically disposed with respect to the pump housing 2. The suction chamber 3 is fixedly connected to the pump body shell 2, and the drive shaft 4 is provided on the back of the impeller body 1. By setting the mounting base 5 and the partition vane 6 on the back of the impeller body 1, and setting the exhaust suction chamber 3 eccentrically outside the mounting base 5, the impeller body 1 drives the mounting base 5 and the partition vane 6 to rotate when it rotates. By utilizing the periodic change in the spatial volume formed by the partition vane 6, the exhaust suction chamber 3 and the mounting base 5, the air in the pump body shell 2 is sucked into the exhaust suction chamber 3 and discharged, so that the pump body shell 2 is gradually filled with water to meet the conditions for centrifugal pumping using the impeller body 1.

[0023] Please see Figure 1 In this embodiment, the pipeline assembly includes an inlet pipe 201 and an outlet pipe 202. The inlet pipe 201 is provided at the center of the front of the pump body shell 2, and the outlet pipe 202 is provided at the edge of the pump body shell 2. The inlet pipe 201 serves as the water inlet channel when the device performs centrifugal pumping, and the outlet pipe 202 serves as the water outlet channel when the device performs centrifugal pumping.

[0024] Please see Figure 2 In this embodiment, an exhaust port 203 is provided on the back of the pump body shell 2. The exhaust port 203 is located in the space formed by the exhaust water suction chamber 3 and the mounting base 5. When there is enough water in the pump body shell 2 for centrifugal pumping, a pipe is connected to the exhaust port 203 and the pipe is connected to the water outlet pipe 202. Water is discharged from the exhaust port 203 into the water outlet pipe 202.

[0025] Please see Figure 4 In this embodiment, the exhaust water suction chamber 3 is provided with a connecting hole 301. The connecting hole 301 is located in the space formed by the exhaust water suction chamber 3 and the mounting base 5. The exhaust hole 203 and the connecting hole 301 are far apart and located in the space on both sides of the mounting base 5. When the space on both sides of the separator vane 6 changes, the air in the pump body shell 2 is drawn into the exhaust water suction chamber 3 through the connecting hole 301, so that the pump body shell 2 is gradually filled with water to achieve the conditions for centrifugal pumping. The connecting hole 301 and the exhaust hole 203 are set far apart to ensure that the connecting hole 301 and the exhaust hole 203 can always be in the space on both sides of the separator vane 6.

[0026] Please see Figure 5In this embodiment, an installation slot 501 is provided at the connection between the mounting base 5 and the partition plate 6. The depth of the installation slot 501 is greater than the length of the partition plate 6. The line connecting the two sets of installation slots 501 passes through the diameter of the partition plate 6. A spring 7 is provided in the installation slot 501. The two ends of the spring 7 are fixedly connected to the partition plate 6 and the mounting base 5, respectively. The installation slot 501 provides space for the partition plate 6 to extend and retract, and the spring 7 provides thrust for the partition plate 6, ensuring that the partition plate 6 and the edge of the exhaust water suction chamber 3 are always in close contact.

[0027] When the centrifugal pump is started without being filled with water, the idling impeller body 1 drives the mounting base 5 and the partition vane 6 to rotate. The spring 7 provides thrust to the partition vane 6, ensuring that the partition vane 6 is always in close contact with the inner wall of the exhaust and suction chamber 3. During the rotation of the partition vane 6, the volume of the space formed by the two sides of the partition vane 6, the exhaust and suction chamber 3, and the mounting base 5 continuously increases and decreases in cycles. When the volume of the space increases, the pressure decreases, and the air in the pump body shell 2 is drawn into the exhaust and suction chamber 3 through the connecting hole 301. When the volume decreases, the air in the exhaust and suction chamber 3 is squeezed out of the exhaust and suction chamber 3 through the exhaust hole 203, allowing water to enter the pump body shell 2 from the inlet pipe 201 to replenish the water. This gradually fills the pump body shell 2 with water, reaching the condition where the impeller body 1 can be used for centrifugal pumping. When the pump body shell 2 is sufficiently filled with water for centrifugal pumping, a pipe is connected at the exhaust hole 203 and connected to the outlet pipe 202. Water is discharged from the exhaust hole 203 into the outlet pipe 202.

[0028] Through the above steps, by setting the mounting base 5 and the partition vane 6 on the back of the impeller body 1, and setting the exhaust and water suction chamber 3 eccentrically outside the mounting base 5, the impeller body 1 drives the mounting base 5 and the partition vane 6 to rotate when it rotates. By utilizing the periodic change in the spatial volume formed by the partition vane 6, the exhaust and water suction chamber 3 and the mounting base 5, the air in the pump body shell 2 is sucked into the exhaust and water suction chamber 3 and discharged, so that the pump body shell 2 is gradually filled with water to meet the conditions for centrifugal pumping using the impeller body 1.

Claims

1. Back shrouded vane-type impeller for self-priming centrifugal pumps, comprising an impeller body (1); characterized in that: The pump also comprises a partitioning vane (6) and a pipeline assembly, the outer side of the impeller body (1) is provided with a pump body shell (2), the outer side of the pump body shell (2) is provided with the pipeline assembly, the back of the impeller body (1) is provided with a mounting base (5), the impeller body (1) and the mounting base (5) are fixedly connected in one piece, the inner side of the mounting base (5) is provided with the partitioning vane (6), the partitioning vane (6) is slidably connected with the mounting base (5), the back of the impeller body (1) is provided with an exhaust water suction chamber (3), the exhaust water suction chamber (3) is eccentrically arranged with the pump body shell (2), and the exhaust water suction chamber (3) is fixedly connected with the pump body shell (2), the back of the impeller body (1) is provided with a driving shaft (4).

2. The back shrouded vane-type impeller for a self-priming centrifugal pump according to claim 1, characterized in that: The pipeline assembly comprises a water inlet pipe (201) and a water outlet pipe (202), the front center of the pump body shell (2) is provided with the water inlet pipe (201), and the edge of the pump body shell (2) is provided with the water outlet pipe (202).

3. The back shrouded vane-type impeller for self-priming centrifugal pumps according to claim 1, characterized in that: The back of the pump body shell (2) is provided with an exhaust hole (203), and the position of the exhaust hole (203) is located in the space formed by the exhaust water suction chamber (3) and the mounting base (5).

4. The back shrouded vane-type impeller for self-priming centrifugal pumps according to claim 1, characterized in that: The exhaust water suction chamber (3) is provided with a communication hole (301), and the position of the communication hole (301) is located in the space formed by the exhaust water suction chamber (3) and the mounting base (5).

5. The back shrouded vane-type impeller for self-priming centrifugal pumps according to claim 4, characterized in that: The exhaust hole (203) and the communication hole (301) are away from each other and located in the space on the two sides of the mounting base (5) respectively.

6. The back shrouded vane-type impeller for self-priming centrifugal pumps according to claim 1, characterized in that: The mounting base (5) is provided with mounting slots (501) at the connection positions with the partitioning vane (6), the depth of the mounting slots (501) is greater than the length of the partitioning vane (6), and the connecting line of the two groups of mounting slots (501) passes through the diameter of the partitioning vane (6).

7. The back shrouded vane-type impeller for self-priming centrifugal pumps according to claim 6, characterized in that: The mounting slots (501) are provided with springs (7), and the two ends of the springs (7) are fixedly connected with the partitioning vane (6) and the mounting base (5) respectively.

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