A self-priming pump with large flow and high specific speed

Abstract

A self-priming pump with large flow and high specific speed, the booster plate structure is located in the water pressure chamber, the booster plate structure divides the water pressure chamber into a reflux buffer chamber and a reflux injection chamber to enhance the self-priming performance; the injection structure includes an injection main pipe, an upper injection branch pipe, a middle injection branch pipe, and a lower injection branch pipe, and the upper injection branch pipe, the middle injection branch pipe, and the lower injection branch pipe are connected to the outlet end of the injection main pipe to form a three-way injection structure; the booster plate structure includes an upper booster groove and a lower booster groove, and the longitudinal cross-sectional structure of the upper booster groove and the lower booster groove is a trapezoidal structure. Due to the improvement of the structure of the self-priming pump, the injection structure and the booster plate structure are set, the flow characteristics are improved, the impact loss of the pump is reduced, and the efficiency of the pump is improved; the speed circulation of the pump is reduced, the speed of the gas-liquid mixing of the pump is accelerated, the self-priming time of the pump is reduced, and the service life of the pump is extended.

Description

Technical Field

[0001] The invention relates to a self-priming pump with large flow rate and high specific speed, in particular to a self-priming pump with improved flow characteristics, large flow rate and high specific speed. Background Art

[0002] Self-priming pumps are mainly used in industrial water supply, sewage treatment, agriculture, nurseries, tea garden irrigation, forests, urban buildings, commercial network fire fighting and other places. It uses the gas-liquid mixing principle and the special structure of the pump to achieve gas suction and form a certain degree of vacuum in the pump suction pipeline. No other special air extraction device is required. Except for the first use, water does not need to be drawn. Each subsequent use does not require water.

[0003] Prior art CN113007100A discloses an adjustable jet self-priming centrifugal pump, comprising a pump housing with a pump cavity disposed therein, a jet tube and a pressure water chamber located in the pump cavity, the jet tube is provided with a reflux hole, the reflux hole connects the jet tube and the pump cavity, the pressure water chamber drives the fluid in the pump cavity to be introduced into the jet tube from the reflux hole, the pump housing is provided with a valve, and the valve can close or open the reflux hole. The valve can be provided to block the reflux hole at a large flow rate to improve cavitation.

[0004] However, the above self-priming pumps all have design limitations, such as poor adaptability, complex structure, large size, high cost, slow self-priming and low efficiency. Therefore, in response to these problems, the applicant proposes a large flow rate and high specific speed self-priming pump. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a large flow rate and high specific speed self-priming pump.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A self-priming pump with large flow and high specific speed comprises a motor 1, a pump shaft 2, an impeller 3, a pressure chamber 4, an elastic valve 5, a return pipe 6, an injection structure 13, an inlet pipe 8, a gravity valve 9, an outlet pipe 10, a boost plate structure 11 and a water inlet pipe 12; the motor 1 drives the impeller 3 to rotate through the pump shaft 2, the pressure chamber 4 is located at the lower part of the self-priming pump, an elastic valve 5 is arranged on one side of the pressure chamber 4, a gravity valve 9 is connected to one side of the inlet pipe 8, the elastic valve 5 is arranged at the inlet of the return pipe 6, the return pipe 6 is connected to one end of the injection structure 13, the other end of the injection structure 13 is located in the water inlet pipe 12 and directly faces the inlet of the impeller 3, the boost plate structure 11 is located in the pressure chamber 4, and the boost plate structure 11 divides the pressure chamber 4 into a return buffer chamber 41 and a return injection chamber 42 to enhance the self-priming performance; it is characterized in that: the injection structure 13 comprises an injection main pipe 7, an upper injection branch pipe 7 1. The middle injection branch pipe 72 and the lower injection branch pipe 73, the upper injection branch pipe 71, the middle injection branch pipe 72 and the lower injection branch pipe 73 are connected to the outlet end of the injection main pipe 7 to form a three-way injection structure, wherein the angle between the upper injection branch pipe 71 and the middle injection branch pipe 72 is A, the angle between the middle injection branch pipe 72 and the lower injection branch pipe 73 is B, and the angle between A and B is A=1.2B+6.8°. The lower surface of the upper injection branch pipe 71 is provided with an upper injection branch hole 711, and the upper surface of the lower injection branch pipe 73 is provided with a lower injection branch hole 733. The upper injection branch hole 711 is arranged opposite to the lower injection branch hole 733, and the outlet end of the middle injection branch pipe 72 is provided with a middle injection branch hole 722; the supercharging plate structure 11 includes an upper supercharging groove 111 and a lower supercharging groove 112, and the longitudinal cross-sectional structure of the upper supercharging groove 111 and the lower supercharging groove 112 is a trapezoidal structure.

[0008] Furthermore, the inlet radius of the impeller 3 is R, and the radius of the upper injection branch hole 711 is R1, R1: R=0.01-0.08.

[0009] Furthermore, the radius of the lower injection branch hole 733 is R3, R3: R=0.05-0.09.

[0010] Furthermore, the radius of the middle injection branch hole 722 is R2, R2: R=0.02-0.06.

[0011] Further, the diameter of the injection main pipe 7 is D, the diameter of the upper injection branch pipe 71 is D1, the diameter of the middle injection branch pipe 72 is D2, and the diameter of the lower injection branch pipe 73 is D3, wherein D>D1, D>D2, and D>D3.

[0012] Further, D2=D1+D3.

[0013] Further, D=D1+D2+D3.

[0014] Furthermore, the upper boost groove 111 includes an upper boost groove inlet 1111 and an upper boost groove outlet 1112, wherein the longitudinal width of the upper boost groove inlet 1111 is H11, and the longitudinal width of the upper boost groove outlet 1112 is H12, wherein H11:H12=3.6-6.6.

[0015] Furthermore, the lower boost groove 112 includes a lower boost groove inlet 1121 and a lower boost groove outlet 1122, wherein the longitudinal width of the lower boost groove inlet 1121 is H21, and the longitudinal width of the lower boost groove outlet 1122 is H22, wherein H21:H22=2.5-8.6.

[0016] Furthermore, H12:H22=1.2-3.3; H11:H21=1.6-2.5.

[0017] The present invention relates to a large flow rate and high specific speed self-priming pump, wherein a spring valve 5 is arranged on one side of a water pressure chamber 4, a gravity valve 9 is connected to one side of an inlet pipe 8, the spring valve 5 is arranged at the inlet of a return pipe 6, the return pipe 6 is connected to one end of a spray structure 13, the other end of the spray structure 13 is located in a water inlet pipe 12 and directly faces the inlet of an impeller 3, a booster plate structure 11 is located in the water pressure chamber 4, and the booster plate structure 11 divides the water pressure chamber 4 into a reflux buffer chamber 41 and a reflux spray chamber 42 to enhance the self-priming performance; the spray structure 13 comprises a spray main pipe 7, an upper spray branch pipe 71, a middle spray branch pipe 72, a lower spray branch pipe 73, and a lower spray branch pipe 74. The pipe 73, the upper injection branch pipe 71, the middle injection branch pipe 72, and the lower injection branch pipe 73 are connected to the outlet end of the injection main pipe 7 to form a three-way injection structure. The lower surface of the upper injection branch pipe 71 is provided with an upper injection branch hole 711, and the upper surface of the lower injection branch pipe 73 is provided with a lower injection branch hole 733. The upper injection branch hole 711 and the lower injection branch hole 733 are arranged opposite to each other, and the outlet end of the middle injection branch pipe 72 is provided with a middle injection branch hole 722; the booster plate structure 11 includes an upper booster groove 111 and a lower booster groove 112, and the longitudinal cross-sectional structure of the upper booster groove 111 and the lower booster groove 112 is a trapezoidal structure. Due to the improvement of the structure of the self-priming pump, the injection structure and the booster plate structure are set, the flow characteristics are improved, the impact loss of the pump is reduced, and the efficiency of the pump is improved; the speed circulation of the pump is reduced, the speed of the gas-liquid mixing of the pump is accelerated, the self-priming time of the pump is reduced, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side view of a large flow and high specific speed self-priming pump;

[0019] Figure 2 It is a longitudinal cross-sectional view of a large flow rate and high specific speed self-priming pump;

[0020] Figure 3 is a schematic diagram of the injection structure;

[0021] Figure 4 Schematic diagram of the booster plate structure.

[0022] In the figure: motor 1; pump shaft 2; impeller 3; water pressure chamber 4; reflux buffer chamber 41; reflux injection chamber 42; elastic valve 5; reflux pipe 6; injection main pipe 7; upper injection branch pipe 71; upper injection branch hole 711; middle injection branch pipe 72; middle injection branch hole 722; lower injection branch pipe 73; lower injection branch hole 733; inlet pipe 8; gravity valve 9; outlet pipe 10; boost plate structure 11; upper boost groove 111; upper boost groove inlet 1111; upper boost groove outlet 1112; lower boost groove 112; lower boost groove inlet 1121; lower boost groove outlet 1122; water inlet pipe 12; injection structure 13; impeller 3 inlet The radius R of the mouth; the radius R1 of the upper injection branch hole 711; the radius R2 of the middle injection branch hole 722; the radius R3 of the lower injection branch hole 733; the angle A between the upper injection branch pipe 71 and the middle injection branch pipe 72; the angle B between the middle injection branch pipe 72 and the lower injection branch pipe 73; the diameter D of the injection main pipe 7; the diameter D1 of the upper injection branch pipe 71; the diameter D2 of the middle injection branch pipe 72; the diameter D3 of the lower injection branch pipe 73; the longitudinal width H11 of the upper boost groove inlet 1111; the longitudinal width H12 of the upper boost groove outlet 1112; the longitudinal width H21 of the lower boost groove inlet 1121; the longitudinal width H22 of the lower boost groove outlet 1122. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1-4As shown, a large flow rate and high specific speed self-priming pump comprises a motor 1, a pump shaft 2, an impeller 3, a pressure chamber 4, an elastic valve 5, a return pipe 6, an injection structure 13, an inlet pipe 8, a gravity valve 9, an outlet pipe 10, a boost plate structure 11, and a water inlet pipe 12; the motor 1 drives the impeller 3 to rotate through the pump shaft 2, the pressure chamber 4 is located at the lower part of the self-priming pump, an elastic valve 5 is arranged on one side of the pressure chamber 4, a gravity valve 9 is connected to one side of the inlet pipe 8, the elastic valve 5 is arranged at the inlet of the return pipe 6, the return pipe 6 is connected to one end of the injection structure 13, the other end of the injection structure 13 is located in the water inlet pipe 12 and directly facing the inlet of the impeller 3, the boost plate structure 11 is located in the pressure chamber 4, and the pressure plate structure 11 divides the pressure chamber 4 into a return buffer chamber 41 and a return injection chamber 42 to enhance the self-priming performance; it is characterized in that: the injection structure 13 comprises an injection main pipe 7, an upper injection branch pipe 71, a middle injection branch pipe 72, and a lower injection branch pipe 73. The upper injection branch pipe 71, the middle injection branch pipe 72, and the lower injection branch pipe 73 are connected to the outlet end of the injection main pipe 7 to form a three-way injection structure, wherein the angle between the upper injection branch pipe 71 and the middle injection branch pipe 72 is A, the angle between the middle injection branch pipe 72 and the lower injection branch pipe 73 is B, and the angle between A and B is A=1.2B+6.8°. An upper injection branch hole 711 is provided on the lower surface of the upper injection branch pipe 71, and a lower injection branch hole 733 is provided on the upper surface of the lower injection branch pipe 73. The upper injection branch hole 711 and the lower injection branch hole 733 are arranged opposite to each other, and a middle injection branch hole 722 is provided at the outlet end of the middle injection branch pipe 72; the supercharging plate structure 11 includes an upper supercharging groove 111 and a lower supercharging groove 112, and the longitudinal cross-sectional structure of the upper supercharging groove 111 and the lower supercharging groove 112 is a trapezoidal structure.

[0026] Furthermore, the inlet radius of the impeller 3 is R, and the radius of the upper injection branch hole 711 is R1, R1: R=0.01-0.08.

[0027] Furthermore, the radius of the lower injection branch hole 733 is R3, R3: R=0.05-0.09.

[0028] Furthermore, the radius of the middle injection branch hole 722 is R2, R2: R=0.02-0.06.

[0029] Further, the diameter of the injection main pipe 7 is D, the diameter of the upper injection branch pipe 71 is D1, the diameter of the middle injection branch pipe 72 is D2, and the diameter of the lower injection branch pipe 73 is D3, wherein D>D1, D>D2, and D>D3.

[0030] Further, D2=D1+D3.

[0031] Further, D=D1+D2+D3.

[0032] Furthermore, the upper boost groove 111 includes an upper boost groove inlet 1111 and an upper boost groove outlet 1112, wherein the longitudinal width of the upper boost groove inlet 1111 is H11, and the longitudinal width of the upper boost groove outlet 1112 is H12, wherein H11:H12=3.6-6.6.

[0033] Furthermore, the lower boost groove 112 includes a lower boost groove inlet 1121 and a lower boost groove outlet 1122, wherein the longitudinal width of the lower boost groove inlet 1121 is H21, and the longitudinal width of the lower boost groove outlet 1122 is H22, wherein H21:H22=2.5-8.6.

[0034] Furthermore, H12:H22=1.2-3.3; H11:H21=1.6-2.5.

[0035] The present invention relates to a large flow rate and high specific speed self-priming pump, wherein a spring valve 5 is arranged on one side of a water pressure chamber 4, a gravity valve 9 is connected to one side of an inlet pipe 8, the spring valve 5 is arranged at the inlet of a return pipe 6, the return pipe 6 is connected to one end of a spray structure 13, the other end of the spray structure 13 is located in a water inlet pipe 12 and directly faces the inlet of an impeller 3, a booster plate structure 11 is located in the water pressure chamber 4, and the booster plate structure 11 divides the water pressure chamber 4 into a reflux buffer chamber 41 and a reflux spray chamber 42 to enhance the self-priming performance; the spray structure 13 comprises a spray main pipe 7, an upper spray branch pipe 71, a middle spray branch pipe 72, a lower spray branch pipe 73, and a lower spray branch pipe 74. The pipe 73, the upper injection branch pipe 71, the middle injection branch pipe 72, and the lower injection branch pipe 73 are connected to the outlet end of the injection main pipe 7 to form a three-way injection structure. The lower surface of the upper injection branch pipe 71 is provided with an upper injection branch hole 711, and the upper surface of the lower injection branch pipe 73 is provided with a lower injection branch hole 733. The upper injection branch hole 711 and the lower injection branch hole 733 are arranged opposite to each other, and the outlet end of the middle injection branch pipe 72 is provided with a middle injection branch hole 722; the booster plate structure 11 includes an upper booster groove 111 and a lower booster groove 112, and the longitudinal cross-sectional structure of the upper booster groove 111 and the lower booster groove 112 is a trapezoidal structure. Due to the improvement of the structure of the self-priming pump, the injection structure and the booster plate structure are set, the flow characteristics are improved, the impact loss of the pump is reduced, and the efficiency of the pump is improved; the speed circulation of the pump is reduced, the speed of the gas-liquid mixing of the pump is accelerated, the self-priming time of the pump is reduced, and the service life is extended.

Claims

1. A self-priming pump with a large flow rate and a high specific speed, comprising a motor (1), a pump shaft (2), an impeller (3), a water pressure chamber (4), a spring valve (5), a return pipe (6), an injection structure (13), an inlet pipe (8), a gravity valve (9), an outlet pipe (10), a pressurizing plate structure (11), and a water inlet pipe (12); the motor (1) drives the impeller (3) to rotate through the pump shaft (2); the water pressure chamber (4) is located at the lower part of the self-priming pump; a spring valve (5) is arranged on one side of the water pressure chamber (4); A gravity valve (9) is connected to one side of the inlet pipe (8), the elastic valve (5) is arranged at the inlet of the return pipe (6), the return pipe (6) is connected to one end of the injection structure (13), the other end of the injection structure (13) is located in the water inlet pipe (12) and directly faces the inlet of the impeller (3), the booster plate structure (11) is located in the water pressure chamber (4), and the booster plate structure (11) divides the water pressure chamber (4) into a return buffer chamber (41) and a return injection chamber (42) to enhance the self-priming performance; the characteristics are: The injection structure (13) comprises an injection main pipe (7), an upper injection branch pipe (71), a middle injection branch pipe (72), and a lower injection branch pipe (73). The upper injection branch pipe (71), the middle injection branch pipe (72), and the lower injection branch pipe (73) are connected to the outlet end of the injection main pipe (7) to form a three-way injection structure, wherein the angle between the upper injection branch pipe (71) and the middle injection branch pipe (72) is A, and the angle between the middle injection branch pipe (72) and the lower injection branch pipe (73) is B. The angle between A and B is A=1.2B+ 6.8°, an upper injection branch hole (711) is arranged on the lower surface of the upper injection branch pipe (71), a lower injection branch hole (733) is arranged on the upper surface of the lower injection branch pipe (73), the upper injection branch hole (711) and the lower injection branch hole (733) are arranged opposite to each other, and a middle injection branch hole (722) is arranged at the outlet end of the middle injection branch pipe (72); the boost plate structure (11) comprises an upper boost groove (111) and a lower boost groove (112), and the longitudinal cross-sectional structures of the upper boost groove (111) and the lower boost groove (112) are trapezoidal structures.

2. A large flow rate and high specific speed self-priming pump as claimed in claim 1, characterized in that: The inlet radius of the impeller (3) is R, and the radius of the upper injection branch hole (711) is R1, where R1: R=0.01-0.

08.

3. A large flow rate and high specific speed self-priming pump as claimed in claim 2, characterized in that: The radius of the lower injection branch hole (733) is R3, R3: R = 0.05-0.

09.

4. A large flow rate and high specific speed self-priming pump as claimed in claim 3, characterized in that: The radius of the middle injection branch hole (722) is R2, R2: R = 0.02-0.

06.

5. A large flow rate and high specific speed self-priming pump as claimed in claim 1, characterized in that: The diameter of the injection main pipe (7) is D, the diameter of the upper injection branch pipe (71) is D1, the diameter of the middle injection branch pipe (72) is D2, and the diameter of the lower injection branch pipe (73) is D3, wherein D>D1, D>D2, and D>D3.

6. A large flow rate and high specific speed self-priming pump as claimed in claim 5, characterized in that: D2=D1+D3.

7. A large flow rate and high specific speed self-priming pump as claimed in claim 5, characterized in that: D=D1+D2+D3.

8. A large flow rate and high specific speed self-priming pump as claimed in claim 1, characterized in that: The upper boost groove (111) comprises an upper boost groove inlet (1111) and an upper boost groove outlet (1112), wherein the longitudinal width of the upper boost groove inlet (1111) is H11, and the longitudinal width of the upper boost groove outlet (1112) is H12, wherein H11:H12=3.6-6.

6.

9. A large flow rate and high specific speed self-priming pump as claimed in claim 8, characterized in that: The lower boost groove (112) comprises a lower boost groove inlet (1121) and a lower boost groove outlet (1122), wherein the longitudinal width of the lower boost groove inlet (1121) is H21, and the longitudinal width of the lower boost groove outlet (1122) is H22, wherein H21:H22=2.5-8.

6.

10. A large flow rate and high specific speed self-priming pump as claimed in claim 9, characterized in that: H12: H22=1.2-3.3; H11: H21=1.6-2.5.

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