Double-impeller parallel type self-priming water pump

Abstract

The invention relates to the field of non-variable-capacity pumps, in particular to a double-impeller parallel type self-priming water pump. A double-impeller parallel type self-priming water pump comprises a water pump shell, a rotating shaft in the front-back direction is rotationally connected to the water pump shell, a first impeller and a second impeller are fixed to the rotating shaft, a plurality of first blades are arranged on the first impeller, a plurality of second blades are arranged on the second impeller, and the first blades are larger than the second blades. Box boxes are arranged on the upper side and the right side of the water pump shell, each box box is provided with two connector pipes, and each connector pipe is connected with a threaded cover through threads. And a coupler is fixed at the rear end of the rotating shaft. The front side of the water pump shell is open, a cover plate is arranged on the front side of the water pump shell, a plurality of screws are annularly fixed to the rear side of the cover plate, the circular ring is located on the rear side of the water pump shell, a plurality of protruding plates are annularly fixed to the circular ring, and the screws are inserted into the protruding plates respectively. The problem that flow and lift are difficult to consider in a traditional double-impeller equal-size design is solved, and the water pump is higher in adaptability under complex working conditions.

Description

Technical Field

[0001] The present invention relates to the field of non-variable displacement pumps, and more particularly to a dual-impeller parallel self-priming water pump. Background Art

[0002] As a fluid conveying device that balances flow and head output, the dual-impeller parallel self-priming pump is widely used in agricultural irrigation, municipal drainage, industrial circulation, and other applications. Its core principle is to drive the synchronous rotation of two impellers via a common shaft, leveraging the combined effect of the two impellers to enhance overall performance. Prior art dual-impeller parallel self-priming pumps typically employ equal-sized impellers. While this design can increase flow or head through the synergistic operation of the two impellers, it suffers from significant structural limitations: the performance curves of equal-sized dual impellers are fixed and cannot dynamically adapt to changing operating conditions. For example, in an irrigation system, when distributing water from a main channel to branch pipes in the field, the main channel requires high flow and low head, while the branch pipes supplying water to high-ridge crops require low flow and high head. Conventional equal-sized dual-impeller pumps require frequent shutdowns for impeller replacement or the installation of additional speed control devices, which is not only cumbersome but also increases equipment cost and energy consumption. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a dual-impeller parallel self-priming water pump, which has the beneficial effect of solving the problem of difficulty in balancing flow and head in traditional dual-impeller and other size designs, making the water pump more adaptable under complex working conditions.

[0004] A double-impeller parallel self-priming water pump includes a water pump housing, a rotating shaft in a front-to-rear direction is rotatably connected to the water pump housing, an impeller 1 and an impeller 2 are fixed on the rotating shaft, impeller 1 is provided with a plurality of blades 1, and impeller 2 is provided with a plurality of blades 2, and blade 1 is larger than blade 2.

[0005] Boxes are provided on the upper side and the right side of the water pump housing. Two joint pipes are provided on each box. A threaded cover is connected to each joint pipe through a thread.

[0006] A coupling is fixed to the rear end of the rotating shaft.

[0007] The front side of the water pump housing is open, and a cover plate is provided on the front side of the water pump housing. A plurality of screws are fixed in a ring shape on the rear side of the cover plate. The circular ring is located on the rear side of the water pump housing, and a plurality of convex plates are fixed in a ring shape on the circular ring. The plurality of screws are respectively inserted into the plurality of convex plates, and the rear end of each screw is connected to a nut through a thread.

[0008] Two arc blocks are fixed on the rear side of the water pump housing, and the two arc blocks are fitted with the left and right sides of the inner ring.

[0009] A track rod is fixed on each box, a fixed seat is slidably connected to the track rod, two pipes are slidably connected to the fixed seat, annular grooves are provided at the ends of the pipes, and ridges are fixed on the lower sides of the two pipes, which are slidably connected to the fixed seat.

[0010] A cylinder 1 is fixed on the fixing seat, and a movable end of the cylinder 1 is fixed on the end of the track rod.

[0011] A central axis is fixed in the middle of the fixed seat, and the middle part of the lever is rotatably connected to the upper part of the central axis. Long holes are provided at both ends of the lever. A round rod is fixed on the upper side of each pipe, and the two round rods are respectively inserted into the two long holes. Cylinder 2 is fixed on the fixed seat, and the movable end of cylinder 2 is fixed on one of the pipes.

[0012] An arc ring is fixed between the two boxes, and the arc panel is attached to the right side of the arc ring. Two protrusions are provided at the upper and lower ends of the left side of the arc panel. A pin is inserted between the two protrusions at the upper end and the two protrusions at the lower end. Both pins are in contact with the left side of the arc ring. Square columns are fixed at the front and rear ends of the arc panel. A slide rail is provided on the left part of the base frame. The lower ends of the two slides are slidably connected to the slide rails. The upper ends of the two slides are respectively inserted into the two square columns. The lower part of each slide is threadedly connected to a fastening screw, and the fastening screw is pressed on the slide rail. A protrusion is fixed on one of the slides, and a hand screw is threaded on the protrusion, and the hand screw is pressed on the left side of the arc panel.

[0013] The base frame is rotatably connected with a rotating wheel, which contacts the lower side of the arc panel. Two limiting rings are fixed to the middle of the rotating wheel, and the two limiting rings are respectively located at the front and rear sides of the arc ring.

[0014] The beneficial effects of the dual-impeller parallel self-priming water pump of the present invention are:

[0015] It solves the problem of difficulty in balancing flow and head in traditional double-impeller designs, making the water pump more adaptable under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 The structure diagram of the double impeller parallel self-priming water pump Figure 1 ;

[0018] Figure 2 The structure diagram of the double impeller parallel self-priming water pump Figure 2 ;

[0019] Figure 3 The structure diagram of the double impeller parallel self-priming water pump Figure 3 ;

[0020] Figure 4 The structure diagram of the double impeller parallel self-priming water pump Figure 4 ;

[0021] Figure 5 Schematic diagram of the water pump casing Figure 1 ;

[0022] Figure 6 Schematic diagram of the water pump casing Figure 2 ;

[0023] Figure 7 Schematic diagram of the shaft structure Figure 1 ;

[0024] Figure 8 Schematic diagram of the shaft structure Figure 2 ;

[0025] Figure 9 Schematic diagram of the cover structure Figure 1 ;

[0026] Figure 10 Schematic diagram of the cover structure Figure 2 ;

[0027] Figure 11 Schematic diagram of the fixed seat structure Figure 1 ;

[0028] Figure 12 Schematic diagram of the fixed seat structure Figure 2 ;

[0029] Figure 13 Schematic diagram of the structure of the chassis;

[0030] Figure 14 Schematic diagram of the structure of the curved panel Figure 1 ;

[0031] Figure 15 Schematic diagram of the structure of the curved panel Figure 2 ;

[0032] In the figure: water pump housing 101; threaded cover 102; joint pipe 103; box 104; arc ring 105; arc block 106;

[0033] Rotating shaft 201; blade 1 202; impeller 1 203; coupling 204; impeller 2 205; blade 2 206;

[0034] Cover plate 301; screw 302; convex plate 303; ring 304;

[0035] Fixed seat 401; cylinder 1 402; pipe 403; cylinder 2 404; lever 405; round rod 406; central axis 407; annular groove 408; track rod 409; ridge 410;

[0036] Base frame 501; slide 502; slide rail 503; thumb screw 504; protruding piece 505; rotating wheel 506; limiting ring 507;

[0037] Arc panel 601; square column 602; protrusion 603; latch 604. DETAILED DESCRIPTION

[0038] like Figure 5-8 As shown;

[0039] The dual-impeller parallel self-priming water pump includes a water pump housing 101, to which a rotating shaft 201 is rotatably connected in a forward-backward direction. Impeller 1 203 and impeller 2 205 are fixed to rotating shaft 201. Impeller 1 203 is provided with a plurality of blades 1 202, and impeller 2 205 is provided with a plurality of blades 2 206. Blades 1 202 are larger than blades 206. Impeller 1 203 and impeller 2 205 are driven to rotate synchronously by rotating shaft 201. Because blades 1 202 are larger than blades 2 206, impeller 1 203 can provide a greater liquid delivery rate, while impeller 2 205 can generate a higher liquid pressure. The synergistic effect of these two impellers ensures a certain flow output when the dual impellers operate in parallel, while the pressure increase of impeller 2 205 compensates for the insufficient head of the larger blades, thereby balancing flow and head and improving the adaptability of the water pump under complex operating conditions.

[0040] like Figure 5-6 As shown;

[0041] Boxes 104 are provided on the upper and right sides of the water pump housing 101, and each box 104 is provided with two joint pipes 103, each of which is threadedly connected to a threaded cap 102. One of the two joint pipes 103 on the box 104 is aligned with the plurality of blades 1 202, and the other is aligned with the plurality of blades 2 206. The two joint pipes 103 on the box 104 correspond to blades 1 202 of impeller 1 203 and blades 2 206 of impeller 2 205, respectively, forming independent fluid passages: the joint pipe 103 aligned with blades 1 202 can be used to transport large-volume liquid generated by large-sized blades, while the joint pipe 103 aligned with blades 2 206 is used to transport high-lift liquid generated by small-sized blades. This design allows the output fluids of the two impellers to be split or merged within the housing 104. When either the high-flow or high-lift function is required, the unneeded connector tube 103 can be sealed with a threaded cap 102, allowing the fluid to be output only from the desired channel. When both functions are required, opening both connector tubes 103 allows the two fluids to merge within the housing 104, resulting in a combined output that balances both flow and lift. The threaded cap 102 seals and opens the connector tubes 103 through a threaded connection, ensuring controllable liquid delivery paths and flexibly adapting to fluid output requirements under different operating conditions.

[0042] like Figure 7-8 As shown;

[0043] A coupling 204 is fixed to the rear end of the rotating shaft 201. The coupling 204 is fixed to the rear end of the rotating shaft 201 and is used to transmit power from an external power source to the rotating shaft 201, so that the rotating shaft 201 obtains rotational power, which in turn drives the impeller 1 203 and the impeller 2 205 to rotate, realizing the pumping function of the water pump and acting as a bridge connecting the power source and the rotating shaft 201.

[0044] like Figure 5-6 and 9-10;

[0045] Since the front side of the water pump housing 101 is open, a cover plate 301 is provided on the front side of the water pump housing 101. A plurality of screws 302 are fixed in a ring shape on the rear side of the cover plate 301. The ring 304 is located on the rear side of the water pump housing 101. A plurality of convex plates 303 are fixed in a ring shape on the ring 304. The plurality of screws 302 are respectively inserted into the plurality of convex plates 303. The rear end of each screw 302 is threadedly connected to a nut. The cover plate 301 is used to close the front side of the water pump housing 101 to prevent liquid from leaking from the front side of the water pump housing 101. The multiple screws 302 on the rear side of the cover plate 301 are inserted into the convex plate 303 of the ring 304. By tightening the nuts at the rear ends of the screws 302, the cover plate 301 and the ring 304 can be fixed together, and then the cover plate 301 can be tightly installed on the front side of the water pump housing 101 to ensure the sealing inside the water pump housing 101. At the same time, it is convenient to disassemble and install the cover plate 301 so as to maintain the internal components of the water pump.

[0046] like Figure 5-6 and 9-10;

[0047] Since two arc blocks 106 are fixed to the rear side of the water pump housing 101, the two arc blocks 106 fit in with the left and right sides of the inner ring of the circular ring 304. When the circular ring 304 is installed, the arc blocks 106 can position and guide the circular ring 304, ensuring the accuracy of the installation position of the circular ring 304. At the same time, it enhances the stability of the connection between the circular ring 304 and the water pump housing 101 and prevents the circular ring 304 from shifting during the operation of the water pump.

[0048] like Figure 5-6 and 11-12;

[0049] Since each of the boxes 104 is fixed with a track rod 409, a fixed seat 401 is slidably connected to the track rod 409, and two pipes 403 are slidably connected to the fixed seat 401, the ends of the pipes 403 are provided with an annular groove 408, and the lower sides of the two pipes 403 are fixed with a ridge 410, which is slidably connected to the fixed seat 401; the track rod 409 provides a sliding track for the fixed seat 401, so that the fixed seat 401 can move along the track rod 409 and adjust its position to meet different pipeline connection requirements. The two pipes 403 on the fixed seat 401 can slide along the ridge 410, and the annular groove 408 at the end of the pipe 403 facilitates connection with the joint pipe 103 or other external pipes. The sliding of the pipe 403 can achieve the docking and separation of the pipes, thereby improving the flexibility of the pipe connection.

[0050] like Figure 11-12 As shown;

[0051] Since cylinder 1 402 is fixed on the fixed seat 401, the movable end of cylinder 1 402 is fixed to the end of the track rod 409, the fixed end of cylinder 1 402 is installed on the fixed seat 401, and the movable end is fixed to the end of the track rod 409. Through the telescopic action of cylinder 1 402, the fixed seat 401 can be driven to slide automatically along the track rod 409, thereby realizing automatic adjustment of the position of the fixed seat 401 without manual movement, thereby improving the convenience and efficiency of operation.

[0052] like Figure 11-12 As shown;

[0053] A central axis 407 is fixed to the center of the fixed base 401, and the central portion of the lever 405 is rotatably connected to the upper portion of the central axis 407. Long holes are provided at both ends of the lever 405. A round rod 406 is fixed to the upper side of each pipe 403, and the two round rods 406 are respectively inserted into the two long holes. A second cylinder 404 is fixed to the fixed base 401, and the movable end of the second cylinder 404 is fixed to one of the pipes 403. When the second cylinder 404 is extended or retracted, it causes the pipe 403 connected to it to slide along the ridge 410. The round rod 406 on the pipe 403 moves within the long hole at one end of the lever 405. Since the central portion of the lever 405 is rotatably connected to the central axis 407, it causes the round rod 406 in the long hole at the other end of the lever 405 to move, thereby causing the other pipe 403 to slide in the opposite direction along the ridge 410. This linkage allows the two pipes 403 to move in opposite directions simultaneously, facilitating simultaneous docking or disconnection with the two joint pipes 103 and improving coordination of pipeline operations. The two pipes 403 can also be moved synchronously by moving the fixing base 401, allowing the two pipes 403 to dock synchronously.

[0054] like Figure 5-6 and 13-15;

[0055] Since the arc ring 105 is fixed between the two boxes 104, the arc panel 601 is attached to the right side of the arc ring 105, and two protrusions 603 are provided at the upper and lower ends of the left side of the arc panel 601. A latch 604 is inserted between the two protrusions 603 at the upper end and between the two protrusions 603 at the lower end. Both latches 604 are in contact with the left side of the arc ring 105. Square columns 602 are fixed at the front and rear ends of the arc panel 601. The left part of the base frame 501 is fixed with a square column 602. A slide rail 503 is provided, and the lower ends of the two slides 502 are slidably connected to the slide rail 503. The upper ends of the two slides 502 are respectively inserted into two square pillars 602. The lower part of each slide 502 is threadedly connected to a fastening screw, which presses on the slide rail 503. A protrusion 505 is fixed to one of the slides 502, and a thumb screw 504 is threadedly connected to the protrusion 505. The thumb screw 504 presses on the left side of the arc panel 601.

[0056] The curved panel 601 fits against the right side of the arc ring 105, and its latch 604 contacts the left side of the arc ring 105, preliminarily securing the curved panel 601 to the arc ring 105. The slide rails 503 of the base frame 501 provide sliding support for the carriage 502. The upper end of the carriage 502 is inserted into the square column 602. Tightening the fastening screws secures the carriage 502, and thus the vertical position of the curved panel 601. Thumb screws 504 press against the left side of the curved panel 601, further tightening the curved panel 601 against the arc ring 105 and facilitating adjustment of the securing force of the curved panel 601. This structure enhances the stability of the connection between the pump and the base frame 501.

[0057] The arc ring 105 is fixed to the water pump housing 101 as a whole, and the arc panel 601 contacts the left side of the arc ring 105 through the pin 604 between the left protrusion 603, forming an arc-shaped matching structure that can rotate relatively. When the angle needs to be adjusted, loosen the fastening screws at the bottom of the slide 502 and the thumb screw 504 on the protrusion 505, and the arc ring 105 can drive the water pump housing 101 to rotate around the arc contact surface of the arc panel 601. After the angle is adjusted to the target position, turn the thumb screw 504 to press it against the left side of the arc panel 601, thereby locking the angle of the water pump housing 101 and the joint pipe 103. This design allows the water pump housing 101 to flexibly adjust its direction within the arc trajectory, so that the joint pipe 103 can adapt to the external pipeline connection requirements in different directions. Especially in scenarios with limited space or complex pipeline layouts, it can greatly improve installation flexibility and pipeline docking efficiency.

[0058] like Figure 5-6 and 13;

[0059] Because the base frame 501 is rotatably connected to a rotating wheel 506, the rotating wheel 506 contacts the lower side of the arc panel 601. Two limiting rings 507 are fixed to the middle of the rotating wheel 506. The two limiting rings 507 are respectively located on the front and rear sides of the arc ring 105. The rotating wheel 506 on the base frame 501 contacts the lower side of the arc panel 601, which can support the arc panel 601, reduce the friction between the arc panel 601 and the base frame 501, and facilitate the rotation and adjustment of the arc panel 601. The two limiting rings 507 in the middle of the rotating wheel 506 are located on the front and rear sides of the arc ring 105, which can limit the displacement of the arc ring 105 and the arc panel 601 in the front and rear directions, ensure the stability of their position, and prevent them from shaking back and forth during operation of the water pump.

Claims

1. A double-impeller parallel self-priming water pump, comprising a water pump casing (101), characterized in that: The water pump housing (101) is rotatably connected to a rotating shaft (201) in a front-to-rear direction, and an impeller 1 (203) and an impeller 2 (205) are fixed to the rotating shaft (201). The impeller 1 (203) is provided with a plurality of blades 1 (202), and the impeller 2 (205) is provided with a plurality of blades 2 (206), and the blades 1 (202) are larger than the blades 2 (206).

2. The dual-impeller parallel self-priming water pump according to claim 1, characterized in that: Boxes (104) are provided on the upper side and the right side of the water pump housing (101), and each box (104) is provided with two joint pipes (103), and each joint pipe (103) is connected to a threaded cover (102) via a thread.

3. The dual-impeller parallel self-priming water pump according to claim 2, characterized in that: A coupling (204) is fixed to the rear end of the rotating shaft (201).

4. The dual-impeller parallel self-priming water pump according to claim 3, characterized in that: The front side of the water pump housing (101) is open, and a cover plate (301) is provided on the front side of the water pump housing (101). A plurality of screw rods (302) are fixed in an annular shape on the rear side of the cover plate (301). A circular ring (304) is located on the rear side of the water pump housing (101), and a plurality of convex plates (303) are fixed in an annular shape on the circular ring (304). The plurality of screw rods (302) are respectively inserted into the plurality of convex plates (303), and a nut is connected to the rear end of each screw rod (302) via a thread.

5. The dual-impeller parallel self-priming water pump according to claim 4, characterized in that: Two arc blocks (106) are fixed to the rear side of the water pump housing (101), and the two arc blocks (106) fit in contact with the left and right sides of the inner ring of the circular ring (304).

6. The dual-impeller parallel self-priming water pump according to claim 5, characterized in that: A track rod (409) is fixed on each of the boxes (104), a fixed seat (401) is slidably connected to the track rod (409), two pipes (403) are slidably connected to the fixed seat (401), an annular groove (408) is provided at the end of the pipe (403), and a ridge (410) is fixed on the lower side of the two pipes (403), and the ridge (410) is slidably connected to the fixed seat (401).

7. The dual-impeller parallel self-priming water pump according to claim 6, characterized in that: A cylinder 1 (402) is fixed on the fixing seat (401), and a movable end of the cylinder 1 (402) is fixed to the end of the track rod (409).

8. The dual-impeller parallel self-priming water pump according to claim 7, characterized in that: A central axis (407) is fixed in the middle of the fixing seat (401), and the middle of the lever (405) is rotatably connected to the upper part of the central axis (407). Long holes are provided at both ends of the lever (405). A round rod (406) is fixed on the upper side of each pipe (403), and the two round rods (406) are respectively inserted into the two long holes. A second cylinder (404) is fixed on the fixing seat (401), and the movable end of the second cylinder (404) is fixed on one of the pipes (403).

9. The dual-impeller parallel self-priming water pump according to claim 8, characterized in that: An arc ring (105) is fixed between the two boxes (104), and the arc panel (601) is attached to the right side of the arc ring (105). Two protrusions (603) are provided at the upper and lower ends of the left side of the arc panel (601). A latch (604) is inserted between the two protrusions (603) at the upper end and between the two protrusions (603) at the lower end. Both latches (604) are in contact with the left side of the arc ring (105). Square columns (602) are fixed at the front and rear ends of the arc panel (601). The left part of the bottom frame (501) is fixed with a square column (602). A slide rail (503) is provided, the lower ends of the two slides (502) are slidably connected to the slide rail (503), the upper ends of the two slides (502) are respectively inserted into the two square columns (602), the lower part of each slide (502) is connected to a fastening screw through a thread, and the fastening screw is pressed on the slide rail (503), and a convex piece (505) is fixed on one of the slides (502), and a hand screw (504) is connected to the convex piece (505) through a thread, and the hand screw (504) is pressed on the left side of the arc panel (601).

10. The dual-impeller parallel self-priming water pump according to claim 9, characterized in that: The base frame (501) is rotatably connected to a rotating wheel (506), which contacts the lower side of the arc panel (601). Two limiting rings (507) are fixed to the middle of the rotating wheel (506), and the two limiting rings (507) are respectively located at the front and rear sides of the arc ring (105).

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