A new type of self-priming centrifugal pump

Abstract

The invention discloses a novel self-priming centrifugal pump, comprising a water outlet, a water injection port, a water inlet system, a circulation system, a third flow channel and a flow guide mechanism, wherein the circulation system comprises a main circulation mechanism, a second flow channel, a lower pump body and a main circulation chamber; the main circulation mechanism comprises an auxiliary flow channel, an inner upper water outlet hole, a main flow channel and an inner lower water outlet hole; the main circulation chamber comprises a water outlet chamber, a first main circulation chamber and a second main circulation chamber; the water inlet system is connected with the main flow channel, the first main circulation chamber is connected with the auxiliary flow channel through the second flow channel; the second main circulation chamber and the water outlet chamber are connected through the third flow channel, the impeller outer water outlet is arranged opposite to the main circulation chamber, the flow guide mechanism comprises a connected flow guide pipe and a nozzle, the nozzle is abutted with the inner upper water outlet hole, and the flow guide pipe is abutted with the impeller outer water inlet. The characteristics are: the flow guide mechanism accelerates the water flow speed and the water flowing through the impeller is sprayed to the main circulation chamber to increase the suction range of the water pump, and at the same time, the vortex effect is used to increase the head and improve the working efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal self-priming pumps, and in particular relates to a novel self-priming centrifugal pump. Background Art

[0002] The impeller water outlet of the existing centrifugal pump is connected to the circulating water inlet of the pump body, so the water pressure cannot be too high, which may easily cause a gap at the connection between the impeller part of the pump body and the pump body, resulting in water leakage. In this way, the water at the impeller water outlet enters the pump body in a flowing rather than jetting manner, which makes the volume of the impeller smaller. During use, the water in the pump body inevitably contains impurities, which may cause the machine to jam, causing damage to the pump body and increasing the return rate. The existing centrifugal pump has a slow water circulation speed, resulting in a short suction range. Since the water output is driven by the pressure generated by the impeller to drive the water output to rotate, this will cause its suction range to be reduced. The water output depends on the pressure in the cavity itself, and the pressure in the cavity itself is limited, resulting in a short head. Therefore, it is necessary to improve it. Summary of the invention

[0003] The purpose of the present invention is to provide a new self-priming centrifugal pump in view of the shortcomings of the above-mentioned prior art. The pump has a flow guide mechanism that can effectively separate gas and liquid and accelerate the speed of water circulation. At the same time, the impeller drives water to spray into the main circulation chamber to greatly increase the suction range of the water pump. At the same time, the vortex effect is used to increase the pressure and thus increase the head, thereby improving the working efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a novel self-priming centrifugal pump, including a water outlet, a water injection port, a water inlet system, a water flow sensing system, a circulation system, a third flow channel and a guide mechanism, wherein the circulation system includes a main circulation mechanism, a second flow channel, an impeller liquid storage chamber, an impeller outer water inlet, an impeller inner water outlet, an impeller mounting chamber, an impeller inner water inlet, an impeller outer water outlet and a main circulation chamber; the main circulation mechanism includes an auxiliary flow channel, an inner upper water outlet, a main flow channel and an inner lower water outlet which are sequentially connected from top to bottom; the main circulation chamber includes a water outlet chamber, a first main circulation chamber and a second main circulation chamber; the water inlet system is connected to the main flow channel, and the first main circulation chamber is connected to the auxiliary flow channel through the second flow channel; the second main circulation chamber and the water outlet chamber are connected through the third flow channel, and the impeller outer water outlet is arranged opposite to the main circulation chamber, and the guide mechanism includes a connected guide pipe and a nozzle, the nozzle is abutted against the inner upper water outlet, and the guide pipe is abutted against the impeller outer water inlet.

[0005] Furthermore, the guide pipe includes a water inlet and a trumpet-shaped guide part, the inner diameter of the trumpet-shaped guide part close to the water inlet is smaller than the inner diameter of the trumpet-shaped guide part away from the water inlet, the water inlet is composed of a hollow cylinder with a through hole, and the nozzle includes a columnar water inlet and a funnel water outlet, the inner diameter of the funnel water outlet away from the columnar water inlet is smaller than the inner diameter of the funnel water outlet close to the columnar water inlet, and the height of the funnel water outlet is smaller than the height of the water inlet.

[0006] Furthermore, a cavity wall of the impeller mounting cavity is provided with a groove, the impeller inner water inlet is located on the groove, and the groove depth of the groove increases in a counterclockwise direction from close to the impeller inner water inlet.

[0007] Furthermore, the water inlet system comprises a water inlet, a first accommodating chamber, a first through hole, a second accommodating chamber and a first flow channel which are connected in sequence, and the water injection port is connected to the auxiliary flow channel.

[0008] Furthermore, the water inlet is located on the side of the first accommodating cavity, the first through hole is located directly above the first accommodating cavity, the first through hole is located directly below the second accommodating cavity, and the first flow channel is located on the side of the first accommodating cavity and the first through hole and the second accommodating cavity.

[0009] Furthermore, the distance from the first through hole to the horizontal plane is not less than the distance from the inner upper water outlet hole to the horizontal plane.

[0010] Furthermore, the auxiliary flow channel and the second flow channel are annular flow channels.

[0011] Furthermore, reinforcing ribs are provided around the periphery of the water inlet.

[0012] After adopting the above structure, the advantages of the present invention compared with the prior art are: the present application is provided with a guide mechanism, wherein the guide mechanism includes a guide pipe and a nozzle abutting each other, wherein the guide pipe includes an integrally formed water inlet and a trumpet-shaped guide part, wherein the inner diameter of the trumpet-shaped guide part close to the water inlet is smaller than the inner diameter of the trumpet-shaped guide part away from the water inlet, wherein the water inlet is composed of a hollow cylinder with a through hole, wherein the nozzle includes an integrally formed columnar water inlet and a funnel water outlet, wherein the inner diameter of the funnel water outlet away from the columnar water inlet is smaller than the inner diameter of the funnel water outlet close to the columnar water inlet, which can increase the pressure, wherein the height of the funnel water outlet is smaller than the height of the water inlet, so that a connecting gap is formed between the guide pipe and the nozzle, which facilitates the water sprayed from the nozzle to merge with the water entering from the water inlet system, facilitates gas-liquid separation, and improves self-priming efficiency. The water inlet is located in the main flow channel, and the end away from the nozzle is in contact with the impeller outer water inlet. When working, water enters the main flow channel from the water inlet system and then enters the impeller installation cavity from the impeller outer water inlet through the water inlet through the guide pipe and the impeller installation cavity. The cavity wall of the impeller installation cavity is provided with a groove, and the impeller inner water inlet is located on the groove, wherein the groove depth increases in a counterclockwise direction from the impeller inner water inlet. In this way, the water entering the impeller installation cavity passes through the impeller and enters the impeller inner water inlet, and finally is sprayed from the impeller outer water outlet to the main circulation cavity, wherein the impeller outer water outlet is connected to the first main circulation cavity. The cavities are suspended and arranged opposite to each other, wherein the first main circulation cavity is connected with the auxiliary flow channel through the second flow channel, so that the water flowing through the first main circulation cavity can flow through the nozzle, and spray water to the guide pipe through the nozzle to complete a cycle. Since the impeller adopts the method of spraying water during the working process, the speed of water discharge can be greatly accelerated, thereby increasing the suction distance; wherein the second main circulation cavity and the water outlet cavity are connected through the third flow channel, so that the water flowing through the second main circulation cavity flows through the third flow channel through the water outlet cavity and merges with the water flowing into the water outlet cavity from the impeller outer water outlet to form a vortex effect, which increases the water outlet pressure and thereby increases the lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional schematic diagram of the upper pump body of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the lower pump body of the present invention.

[0015] Figure 3 It is a cross-sectional schematic diagram of the flow guiding mechanism of the present invention.

[0016] Figure 4 It is a cross-sectional schematic diagram of the flow guide tube.

[0017] Figure 5 It is a cross-sectional schematic diagram of the nozzle.

[0018] Figure 6 It is a cross-sectional schematic diagram of the upper pump body of the present invention in another direction.

[0019] Figure 7 It is a structural schematic diagram of the lower pump body of the present invention from another angle.

[0020] Figure 8 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0021] The following description is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention. The present invention is further described below in conjunction with the drawings and embodiments.

[0022] For example, see Figures 1 to 8As shown: A new self-priming centrifugal pump, characterized in that it includes a water outlet 14, a water injection port 13, a water inlet system, a water flow sensing system 12, a circulation system, a third flow channel 52 and a flow guide mechanism, wherein the circulation system includes a main circulation mechanism, a second flow channel 51, an impeller liquid storage chamber 61, an impeller outer water inlet 621, an impeller inner water outlet 622, an impeller mounting chamber 64, an impeller inner water inlet 632, an impeller outer water outlet 631 and a main circulation chamber; wherein the main circulation mechanism includes an auxiliary flow channel 31, an inner upper water outlet 32, a main flow channel 33 and an inner lower water outlet 34 which are sequentially connected from top to bottom The impeller outer water inlet 621 is connected to the impeller inner water outlet 622, wherein the impeller outer water inlet 621 is located in the impeller liquid storage chamber 61, wherein the impeller inner water outlet 622 is located in the middle of the impeller mounting chamber 64, so that the water flowing through the impeller outer water inlet 621 can flow from the impeller inner water outlet 622 to the impeller mounting chamber 64, wherein the impeller inner water inlet 632 is connected to the impeller outer water outlet 631, wherein the impeller inner water inlet 632 is located at the side of the impeller mounting chamber 64, so that the water in the impeller mounting chamber 64 can flow from the impeller inner water inlet 732 to the impeller outer water outlet 731. The impeller outer water outlet 631 is arranged opposite to the main circulation chamber, so that the water coming out of the impeller outer water outlet 631 can flow smoothly into the main circulation chamber. The main circulation chamber includes a water outlet chamber 41, a first main circulation chamber 42 and a second main circulation chamber 43; the guide mechanism includes a guide pipe 71 and a nozzle 72 connected to each other, wherein the nozzle 72 is in contact with the inner upper water outlet hole 32 so that water flowing through the auxiliary flow channel 31 can be sprayed through the nozzle to the guide pipe, and the first main circulation chamber 42 is connected with the auxiliary flow channel 31 through the second flow channel 51, and then the water in the first main circulation chamber 42 can be sprayed through the nozzle to the guide pipe, wherein the guide pipe 71 includes a water inlet portion 711 and a trumpet-shaped guide portion 712, and an annular groove is provided between the water inlet portion 711 and the trumpet-shaped guide portion 712 for placing a sealing ring 713 to better play a sealing role. The water inlet part 711 is composed of a hollow cylinder with a through hole and is located in the main channel 33. At the same time, the water inlet system is connected with the main channel 33, so that the water entering from the water inlet system can flow from the through hole of the water inlet part 711 to the trumpet-shaped guide part 712, wherein the guide pipe 71 is in contact with the outer water inlet 621 of the impeller, so that the water passing through the guide pipe 71 can be sprayed into the main circulation chamber through the impeller and enter the circulation.

[0023] like Figures 3 to 5As shown in the figure: the inner diameter D4 of the trumpet-shaped guide part 712 close to the water inlet part 711 is smaller than the inner diameter D5 of the trumpet-shaped guide part 712 away from the water inlet part 711, wherein the nozzle 72 includes a columnar water inlet part 721 and a funnel water outlet part 722, wherein the inner diameter D3 of the funnel water outlet part 722 away from the columnar water inlet part 721 is smaller than the inner diameter D2 of the funnel water outlet part 722 close to the columnar water inlet part 721, which helps to increase the pressure; wherein the outer diameter D1 of the columnar water inlet part 721 is equal to the inner diameter D4 of the water inlet part 711, and a nozzle 72 is provided outside the columnar water inlet part 721. There is a limit ring 7211 and the outer diameter D6 of the limit ring 7211 is larger than the inner diameter D4 of the water inlet 711, so that the nozzle 72 and the guide tube 71 are clamped, wherein the height L5 of the funnel water outlet 722 is smaller than the height L6 of the water inlet 711, so that a connecting gap is formed between the water inlet 711 and the funnel water outlet 722, so that the water ejected from the funnel water outlet 722 and the water entering from the water inlet system can be merged here, which is convenient for gas-liquid separation and at the same time accelerates the water flow speed and thus increases the circulation speed, thereby improving efficiency and increasing the suction range.

[0024] like Figures 1 to 2 As shown in Figures 6 to 8: the second main circulation chamber 43 and the water outlet chamber 41 are connected through the third flow channel 52, so that the water flowing through the second main circulation chamber 43 flows through the third flow channel 52 and flows through the water outlet chamber 41. At this time, it merges with the water flowing into the water outlet chamber 41 from the impeller outlet 631 to form a vortex effect to increase the outlet pressure, and then flows out from the outlet 14 connected to the water outlet chamber 41 to increase the head. The impeller outlet 631 is arranged opposite to the main circulation chamber in a suspended state, and the impeller outlet 631 is directly opposite to the first main circulation chamber 42, which can shorten the straight-line distance from the impeller outlet 631 to the wall of the first main circulation chamber 42, accelerate the circulation speed, and further improve the suction distance.

[0025] like Figure 7 As shown: a groove 65 is provided on the side of the impeller mounting cavity 64, wherein the impeller inner water inlet 632 is located on the groove 65 and the groove depth of the groove 65 increases successively from close to the impeller inner water inlet 632 in the counterclockwise direction, that is, L3>L4, so that the water entering from the impeller inner water outlet 622 can flow through the impeller to the impeller inner water inlet 632 and then flow to the impeller outer water outlet 631 for final circulation.

[0026] like Figure 1As shown: the water inlet system includes a water inlet 11, a first accommodating cavity 21, a first through hole 22, a second accommodating cavity 23 and a first flow channel 24 which are connected in sequence, wherein the water inlet 11 is located at the side of the first accommodating cavity 21, wherein the first through hole 22 is located directly above the first accommodating cavity 21, wherein the first through hole 22 is located directly below the second accommodating cavity 23, wherein the first flow channel 24 is located at the side of the first accommodating cavity 21 and the first through hole 22 and the second accommodating cavity 23, wherein the distance L1 from the first through hole 22 to the horizontal plane is not less than the inner upper water outlet 32 The distance L2 to the horizontal plane, so that when water enters the pump body from the water inlet, it first flows through the first accommodating chamber 21 until the water reaches a certain level and overflows the first accommodating chamber 21, flows through the first through hole 22, and then flows through the second accommodating chamber 23. At this time, the water flow sensing system 12 in contact with the second accommodating chamber 23 can sense the water coming and feed back to the control system connected to it, and then the water flows through the first flow channel 24. At this time, according to the water flow direction (as shown by the dotted line with an arrow in the figure), it is just in a "J" shape, which can avoid the backflow phenomenon that causes the water to flow back to the water inlet 11. The water injection port is connected to the auxiliary flow channel, which is used to fill the impeller liquid storage chamber 61 with water when it is used for the first time.

[0027] Furthermore, the auxiliary flow channel 31 and the second flow channel 51 are annular flow channels, so that the water flowing through the second flow channel 51 can better flow into the auxiliary flow channel 31 and then circulate to avoid water retention in the second flow channel 51.

[0028] like Figure 8 As shown: reinforcing ribs 111 are provided around the water inlet 11 to enhance the strength of the water inlet.

[0029] Centrifugal pumps are currently widely used, and other structures and principles are the same as those in the prior art, so they will not be described here.

Claims

1. A new type of self-priming centrifugal pump, characterized in that: It includes a water outlet, a water injection port, a water inlet system, a water flow sensing system, a circulation system, a third flow channel and a guide mechanism, wherein the circulation system includes a main circulation mechanism, a second flow channel, a lower pump body and a main circulation chamber; the lower pump body includes an impeller liquid storage chamber, an impeller outer water inlet, an impeller inner water outlet, an impeller mounting chamber, an impeller inner water inlet and an impeller outer water outlet; the main circulation mechanism includes an auxiliary flow channel, an inner upper water outlet, a main flow channel and an inner lower water outlet which are sequentially connected from top to bottom; the main circulation chamber includes a water outlet chamber, a first main circulation chamber and a second main circulation chamber; the water inlet system is connected to the main flow channel, and the first main circulation chamber is connected to the auxiliary flow channel through the second flow channel; the second main circulation chamber and the water outlet chamber are connected through the third flow channel, and the impeller outer water outlet is arranged opposite to the main circulation chamber, and the guide mechanism includes a connected guide pipe and a nozzle, the nozzle is abutted against the inner upper water outlet, and the guide pipe is abutted against the impeller outer water inlet, The guide tube comprises a water inlet and a trumpet-shaped guide part, the inner diameter of the trumpet-shaped guide part close to the water inlet is smaller than the inner diameter of the trumpet-shaped guide part away from the water inlet, the water inlet is composed of a hollow cylinder with a through hole, the nozzle comprises a columnar water inlet and a funnel water outlet, the inner diameter of the funnel water outlet away from the columnar water inlet is smaller than the inner diameter of the funnel water outlet close to the columnar water inlet, the height of the funnel water outlet is smaller than the height of the water inlet, The cavity wall of the impeller installation cavity is provided with a groove, the impeller inner water inlet is located on the groove, and the groove depth of the groove increases in a counterclockwise direction from the inner water inlet of the impeller. The water inlet system comprises a water inlet, a first accommodating chamber, a first through hole, a second accommodating chamber and a first flow channel which are connected in sequence, and the water injection port is connected with the auxiliary flow channel. The water inlet is located at the side of the first accommodating cavity, the first through hole is located directly above the first accommodating cavity, the first through hole is located directly below the second accommodating cavity, and the first flow channel is located at the side of the first accommodating cavity and the first through hole and the second accommodating cavity. The distance from the first through hole to the horizontal plane is not less than the distance from the inner upper water outlet hole to the horizontal plane. The auxiliary flow channel and the second flow channel are annular flow channels, Reinforcing ribs are arranged around the water inlet.

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