Centrifugal water pump with high lift

Abstract

The utility model provides a centrifugal water pump with high lift, which belongs to the technical field of centrifugal water pumps and comprises a shell, a first water cover and a second water cover, the first water cover and the second water cover are arranged on the shell, a first pump body and a second pump body are respectively mounted in the shell, and a bottom cover is mounted at the bottom end of the shell. According to the utility model, the two pump bodies are cascaded, the water outlet pipe of one pump body is directly connected with the water inlet pipe of the other pump body, so that the pressure loss between the two-stage water pump is reduced, the overall lift of the water pump is improved, the positioning rod on the insertion frame is matched with the fixing frame to realize the connection and fixation of the joint, and the strength of the pipeline joint is ensured; the sealing effect of the connecting position is improved, leakage of fluid at the connecting position and pressure loss are avoided, the total lift of the system is not affected, meanwhile, the air bag is arranged to expand while fixing the connecting position, the side wall of the air bag tightly abuts against an inlet of the pipeline connecting position, the sealing effect is further improved, and the service life of the system is prolonged. And the high lift is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal water pump technical field, specifically, relate to a centrifugal water pump of high lift. BACKGROUND

[0002] Centrifugal pump is a kind of pump using the centrifugal force generated by impeller rotation to transport liquid, it is thrown out by high-speed rotating impeller, to form negative pressure at suction inlet, so that external liquid is sucked into the pump under the action of atmospheric pressure, to realize the continuous delivery of liquid, centrifugal water pump is composed of multiple key components, including impeller, pump shell, pump shaft, bearing, sealing ring and packing gland etc., centrifugal water pump is widely used in industry, civil field due to its long service life, low noise, simple structure.

[0003] In prior art, high-lift centrifugal water pump is needed in many occasions, commonly used are high-power water pump, inner cascade water pump or multistage impeller water pump, the former has large energy consumption and volume, and the latter has large pressure loss, how to invent a centrifugal water pump with high lift to solve these problems has become a problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a centrifugal water pump with high lift, which aims to solve the problems of large energy consumption, volume and pressure loss of high-power water pump, inner cascade water pump or multistage impeller water pump.

[0005] The utility model is realized as follows:

[0006] The utility model provides a centrifugal water pump with high lift, which comprises an outer shell, a first water cover and a second water cover arranged on the outer shell, a first pump body and a second pump body respectively arranged in the outer shell, and a bottom cover arranged at the bottom end of the outer shell.

[0007] The first water cover is arranged above the first pump body, the side wall of the first water cover is provided with a first water inlet pipe and a first water outlet pipe, the first water inlet pipe and the first water outlet pipe are communicated with the water inlet and outlet of the first pump body respectively, a fixing groove is formed in the outer side wall of the first water outlet pipe, three positioning grooves are formed in the inner wall of the fixing groove, a limiting groove is formed in the inner wall of the positioning groove, a fixing frame is arranged in the inner wall of the fixing groove, two symmetrical insertion rods are arranged on one side of the fixing frame, and a threaded stud is arranged on the inner wall of the fixing frame close to the center position.

[0008] The second water cover is installed above the shell near the second pump body, the side wall of the second water cover is respectively provided with a second water inlet pipe and a second water outlet pipe, the second water inlet pipe and the second water outlet pipe are respectively communicated with the water inlet and outlet end of the second pump body, the inner wall of the second water inlet pipe is provided with a mounting groove, the inner wall of the mounting groove is provided with a sealing ring, the side wall of the second water inlet pipe is provided with a resisting ring, one side of the resisting ring is provided with an inserting frame, one side of the inserting frame is provided with three positioning rods, and the positioning rods are provided with positioning holes.

[0009] Preferably, the first water cover and the second water cover are fixed to the shell through bolts, the outer wall of the fixed frame is inserted into the inner wall of the fixed groove, and the outer wall of the stud is threadedly connected to the inner wall of the fixed frame.

[0010] Preferably, the outer wall of the second water inlet pipe is inserted into the inner wall of the first water outlet pipe, the side wall of the mounting groove is fixedly connected to the inner wall of the sealing ring, and the outer wall of the sealing ring is sealingly connected to the inner wall of the first water outlet pipe.

[0011] Preferably, the outer wall of the positioning rod is slidingly connected to the inner wall of the resisting ring, the outer wall of the positioning rod is slidingly connected to the inner wall of the positioning groove, and the inserting rod sequentially slides through the positioning hole and the limiting groove.

[0012] Preferably, the outer wall of the stud is slidingly connected to the inner wall of the positioning hole, the outer wall of the stud is threadedly connected to the inner wall of the limiting groove, and one end of the stud is provided with a knob.

[0013] By adopting the above technical scheme, the two pump bodies are connected through the water inlet and the water outlet, the pressure loss between the pump bodies is reduced, the lift of the water pump is improved, the sealing strength is improved by the sealing ring arranged at the connection, leakage of the connection is avoided, the sealing effect of the connection is ensured, leakage of fluid at the connection and pressure loss are avoided, and the total lift of the system is not affected.

[0014] Preferably, the inner side wall of the first water outlet pipe is provided with a sealing groove, the inner wall of the sealing groove is provided with an air bag, and the air bag is arranged in an annular shape.

[0015] Preferably, a plurality of equidistant piston cavities are arranged in the resisting ring, one end of the piston cavity is communicated with the inside of the air bag, and a piston rod is sealingly and slidingly connected to the inner wall of the piston cavity.

[0016] By adopting the above technical scheme, in the process of fixing the connection, the air bag is inflated, the side wall of the inflated air bag is tightly abutted against the side wall of the sealing groove and the resisting ring, the connection between the first water outlet pipe and the second water inlet pipe is sealed, and the sealing effect is further improved.

[0017] The utility model discloses beneficial effects are:

[0018] By cascading two pump bodies, with the outlet pipe of one pump body directly connected to the inlet pipe of the other, the pressure loss between the two pumps is reduced, thereby increasing the overall head of the pumps. The positioning rod on the insert frame, together with the fixing frame, secures the connection at the joint, ensuring the strength of the pipe connection, improving the sealing effect, and preventing fluid leakage and pressure loss at the connection, thus ensuring that the total head of the system is not affected. At the same time, the air bladder expands while fixing the connection, so that its sidewall tightly presses against the inlet of the pipe connection, further improving the sealing effect and ensuring that the high head is not affected. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a high-head centrifugal water pump provided by an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of a high-head centrifugal water pump structure provided by an embodiment of this utility model;

[0022] Figure 3 This is a partial structural diagram of a high-head centrifugal water pump provided by an embodiment of the present invention;

[0023] Figure 4 This is a partial half-sectional view of a high-head centrifugal water pump provided by an embodiment of the present invention;

[0024] Figure 5 This utility model provides a high-head centrifugal water pump. Figure 4 Enlarged view of the structure of region A in the middle;

[0025] Figure 6 This is a partial structural cross-sectional view of a high-head centrifugal water pump provided by an embodiment of this utility model;

[0026] Figure 7 This utility model provides a high-head centrifugal water pump. Figure 6 Enlarged view of the structure of region B in the middle.

[0027] In the figure: 1, shell; 2, bottom cover; 3, first pump body; 4, second pump body; 5, first water cover; 51, first water inlet pipe; 52, first water outlet pipe; 53, fixed groove; 54, positioning groove; 541, limiting groove; 55, sealing groove; 6, second water cover; 61, second water inlet pipe; 611, mounting groove; 62, second water outlet pipe; 63, stop ring; 631, piston cavity; 64, piston rod; 65, sealing ring; 7, insertion frame; 71, positioning rod; 72, positioning hole; 8, fixed frame; 81, insertion rod; 9, stud; 91, knob; 10, air bag. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Embodiment, refer to Figures 1-7 A centrifugal water pump with high lift, comprising a shell 1 and a first water cover 5 and a second water cover 6 arranged on the shell 1, a first pump body 3 and a second pump body 4 are respectively arranged in the shell 1, and a bottom cover 2 is arranged at the bottom end of the shell 1.

[0030] The first water cover 5 is arranged above the first pump body 3 of the shell 1, the side wall of the first water cover 5 is respectively provided with a first water inlet pipe 51 and a first water outlet pipe 52, the first water inlet pipe 51 and the first water outlet pipe 52 are respectively communicated with the water inlet and outlet ends of the first pump body 3, the outer side wall of the first water outlet pipe 52 is provided with a fixed groove 53, the inner wall of the fixed groove 53 is provided with three positioning grooves 54, the inner wall of the positioning groove 54 is provided with a limiting groove 541, the inner wall of the fixed groove 53 is provided with a fixed frame 8, one side of the fixed frame 8 is provided with two symmetrical insertion rods 81, and the inner wall of the fixed frame 8 close to the center position is provided with a stud 9.

[0031] The second water cover 6 is arranged above the second pump body 4 of the shell 1, the side wall of the second water cover 6 is respectively provided with a second water inlet pipe 61 and a second water outlet pipe 62, the second water inlet pipe 61 and the second water outlet pipe 62 are respectively communicated with the water inlet and outlet ends of the second pump body 4, the inner wall of the second water inlet pipe 61 is provided with a mounting groove 611, the inner wall of the mounting groove 611 is provided with a sealing ring 65, the side wall of the second water inlet pipe 61 is provided with a stop ring 63, one side of the stop ring 63 is provided with an insertion frame 7, one side of the insertion frame 7 is provided with three positioning rods 71, and the positioning rods 71 are provided with positioning holes 72.

[0032] Further, the first water cover 5 and the second water cover 6 are fixed by bolts and the shell 1, the outer wall of the fixed frame 8 and the inner wall of the fixed groove 53 are inserted, the outer wall of the stud 9 and the inner wall of the fixed frame 8 are threadedly connected, the outer wall of the second water inlet pipe 61 and the inner wall of the first water outlet pipe 52 are inserted, the side wall of the mounting groove 611 and the inner wall of the sealing ring 65 are fixedly connected, the outer wall of the sealing ring 65 and the inner wall of the first water outlet pipe 52 are sealingly connected, the outer wall of the positioning rod 71 and the inner wall of the abutting ring 63 are slidingly connected, the outer wall of the positioning rod 71 and the inner wall of the positioning groove 54 are slidingly connected, the insertion rod 81 slides through the positioning hole 72 and the limiting groove 541 in sequence, the outer wall of the stud 9 and the inner wall of the positioning hole 72 are slidingly connected, the outer wall of the stud 9 and the inner wall of the limiting groove 541 are threadedly connected, and one end of the stud 9 is provided with a knob 91.

[0033] It should be noted that the two pump bodies are connected through the water inlet and the water outlet, the pressure loss between the pump bodies is reduced, thereby improving the lift of the water pump, in the process of sleeving the first water outlet pipe 52 and the second water inlet pipe 61, the sealing strength is improved by the sealing ring 65, and leakage at the connection is avoided, and after the two pipes are sleeved, the positioning rod 71 and the positioning groove 54 are aligned and inserted after the insertion frame 7 is close to the outer side of the second water inlet pipe 61, the insertion frame 7 is attached to the abutting ring 63, the positioning hole 72 on the positioning rod 71 and the limiting groove 541 are aligned, the fixed frame 8 is inserted into the fixed groove 53, the insertion rods 81 on both sides thereof sequentially pass through the positioning rod 71 and the limiting groove 541, the positioning rod 71 and the insertion frame 7 are fixed, the knob 91 is rotated to rotate the stud 9, the stud 9 passes through the positioning hole 72 and the limiting groove 541 and is threadedly fixed, the fixed frame 8 is fixed as a whole, the connection strength between the first water outlet pipe 52 and the second water inlet pipe 61 is improved, the sealing effect of the connection is ensured, fluid leakage and pressure loss at the connection are avoided, and the total lift of the system is not affected.

[0034] Further, the inner side wall of the first water outlet pipe 52 is provided with a sealing groove 55, the sealing groove 55 is provided with an air bag 10, the air bag 10 is annularly arranged, a plurality of equidistant piston cavities 631 are formed in the inner portion of the abutting ring 63, one end of the piston cavity 631 is communicated with the inner portion of the air bag 10, and the inner wall of the piston cavity 631 is slidingly connected with a piston rod 64.

[0035] It should be noted that in the process of inserting and fixing the positioning rod 71 on one side of the insertion frame 7, the side wall thereof presses the piston rod 64 to compress the air in the piston cavity 631 and move, and the gas in the piston cavity 631 is compressed into the air bag 10, so that the air bag 10 is inflated, the side wall of the inflated air bag is tightly attached to the side walls of the sealing groove 55 and the abutting ring 63, thereby sealing the connection between the first water outlet pipe 52 and the second water inlet pipe 61, and further improving the sealing effect.

[0036] The working principle of the centrifugal water pump with high lift is as follows:

[0037] The two pump bodies are connected through the water inlet and the water outlet, the pressure loss between the pump bodies is reduced, and thus the lift of the water pump is improved. During the sleeving of the first water outlet pipe 52 and the second water inlet pipe 61, after the two pipes are sleeved, the positioning rod 71 and the positioning groove 54 are aligned and inserted, the insert frame 7 is attached to the outer side of the second water inlet pipe 61, the positioning hole 72 on the positioning rod 71 and the limiting groove 541 are aligned, the fixed frame 8 is inserted into the fixed groove 53, the plug rods 81 on both sides of the fixed frame 8 are sequentially inserted through the positioning rod 71 and the limiting groove 541, the positioning rod 71 and the insert frame 7 are fixed, the knob 91 is rotated to rotate the stud 9, the stud 9 is screwed through the positioning hole 72 and the limiting groove 541, the fixed frame 8 is fixed as a whole, during the insertion and fixation of the positioning rod 71 on one side of the insert frame 7, the positioning rod 71 is pressed against the piston rod 64 to compress the air in the piston cavity 631 and move, the gas in the piston cavity 631 is compressed into the air bag 10, so that the air bag 10 is inflated, the side wall of the inflated air bag is tightly attached to the side wall of the sealing groove 55 and the resistance ring 63, so that the connection between the first water outlet pipe 52 and the second water inlet pipe 61 is sealed, the sealing effect is further improved, liquid leakage is avoided to cause pressure loss, and thus the lift of the cascaded pump body is not affected and the lift is improved.

[0038] The above only describes preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centrifugal water pump with high lift, comprising a casing (1) and a first water cover (5) and a second water cover (6) arranged on the casing (1), characterized in that, The inner part of the shell (1) is respectively provided with a first pump body (3) and a second pump body (4), and the bottom end of the shell (1) is provided with a bottom cover (2); The first water cover (5) is installed above the shell (1) near the first pump body (3), the side wall of the first water cover (5) is respectively provided with a first water inlet pipe (51) and a first water outlet pipe (52), the first water inlet pipe (51) and the first water outlet pipe (52) are respectively communicated with the water inlet and outlet ends of the first pump body (3), the outer side wall of the first water outlet pipe (52) is provided with a fixing groove (53), the inner wall of the fixing groove (53) is provided with three positioning grooves (54), the inner wall of the positioning groove (54) is provided with a limiting groove (541), the inner wall of the fixing groove (53) is provided with a fixing frame (8), one side of the fixing frame (8) is provided with two symmetrical insertion rods (81), and the inner wall of the fixing frame (8) near the center position is provided with a threaded stud (9). The second water cover (6) is installed above the shell (1) near the second pump body (4), the side wall of the second water cover (6) is respectively provided with a second water inlet pipe (61) and a second water outlet pipe (62), the second water inlet pipe (61) and the second water outlet pipe (62) are respectively communicated with the water inlet and outlet ends of the second pump body (4), the inner wall of the second water inlet pipe (61) is provided with a mounting groove (611), the inner wall of the mounting groove (611) is provided with a sealing ring (65), the side wall of the second water inlet pipe (61) is provided with a resisting ring (63), one side of the resisting ring (63) is provided with an insertion frame (7), one side of the insertion frame (7) is provided with three positioning rods (71), and the positioning rods (71) are provided with positioning holes (72).

2. A high head centrifugal water pump according to claim 1, characterized in that The first water cover (5) and the second water cover (6) are fixed with the shell (1) through bolts, the outer wall of the fixing frame (8) is inserted into the inner wall of the fixing groove (53), and the outer wall of the threaded stud (9) is threadedly connected with the inner wall of the fixing frame (8).

3. A high head centrifugal water pump according to claim 2, characterized in that The outer wall of the second water inlet pipe (61) is inserted into the inner wall of the first water outlet pipe (52), the side wall of the mounting groove (611) is fixedly connected with the inner wall of the sealing ring (65), and the outer wall of the sealing ring (65) is sealingly connected with the inner wall of the first water outlet pipe (52).

4. A high head centrifugal water pump according to claim 3, characterized in that The outer wall of the positioning rod (71) is slidingly connected with the inner wall of the resisting ring (63), the outer wall of the positioning rod (71) is slidingly connected with the inner wall of the positioning groove (54), and the insertion rod (81) sequentially slidingly passes through the positioning hole (72) and the limiting groove (541).

5. A high head centrifugal water pump according to claim 4, characterized in that The outer wall of the threaded stud (9) is slidingly connected with the inner wall of the positioning hole (72), the outer wall of the threaded stud (9) is threadedly connected with the inner wall of the limiting groove (541), and one end of the threaded stud (9) is provided with a knob (91).

6. A high head centrifugal pump according to claim 1, characterized in that The inner side wall of the first water outlet pipe (52) is provided with a sealing groove (55), the inner wall of the sealing groove (55) is provided with an air bag (10), and the air bag (10) is arranged in an annular shape.

7. A high head centrifugal pump according to claim 6, characterized in that The inside of the counter ring (63) is provided with a plurality of equidistant piston cavities (631), one end of the piston cavity (631) is communicated with the inside of the air bag (10), and the inner wall of the piston cavity (631) is sealingly and slidably connected with a piston rod (64).

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