Parallel shunt centrifugal pump

Abstract

The utility model provides a parallel shunt centrifugal pump, which belongs to the technical field of water heaters, and comprises a volute, a cover plate, an impeller assembly and a one-way valve, the volute comprises a first water channel and a second water channel which are connected in parallel; the cover plate is connected to the volute and provided with a water inlet hole, and the water inlet hole communicates with the water inlet ends of the first water channel and the second water channel. The impeller assembly is installed in the volute so as to accelerate and pressurize the second water channel. The one-way valve is connected to the volute, and the water inlet end of the one-way valve communicates with the water outlet end of the first water channel to control the water flow direction of the first water channel and prevent reverse backflow. The first water channel and the second water channel which are connected in parallel are integrated in the volute, the requirement for large flow can be met, pressurization can be achieved, a waterway is simplified, and installation space and product cost are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water heater technical field especially relates to a parallel shunt centrifugal pump. BACKGROUND

[0002] At present, the zero cold water water heater on the market realizes the circulation preheating or pressure boosting function through the built-in centrifugal pump. After starting the preheating function, the built-in centrifugal pump drives the water in the inner and outer pipes to circulate and flow to heat, realizing the instant heating of the water. After starting the pressure boosting function, the built-in centrifugal pump operates to increase the water flow, improving the bathing experience.

[0003] As shown in the formula, Figure 1 The conventional centrifugal pump is driven by the motor (5) to centrifugal impeller (3), and the water is thrown to the edge of the volute (1), and then flows out from the water outlet, so as to realize the circulation or pressure boosting function of the water heater. In order to meet the actual home installation pipeline circulation preheating demand, the centrifugal pump manufacturer reduces the water outlet diameter to improve the centrifugal pump lift, but it will reduce the normal water flow. If you want to meet the large lift and large diameter at the same time, you need to increase the volume and electric power of the centrifugal pump, which leads to high cost and high power consumption.

[0004] As shown in the formula, Figure 2 , 3 At present, there is a zero cold water water heater on the market, which is provided with a water channel parallel to the water pump and a one-way valve (4) in the water channel. When the pump is not started, the tap water is divided into the water pump and the parallel water channel, and is not limited by the water pump flow. When the pump is started, negative pressure is generated at the water inlet of the water pump, and high pressure is generated at the water outlet of the water pump, which improves the water flow rate. At the same time, the one-way valve (4) prevents the high pressure water at the water outlet of the water pump from flowing back to the water inlet of the water pump through the parallel water channel, realizing the circulation preheating or pressure boosting function. However, the water pump parallel water channel method needs to be additionally provided with a parallel water channel, which occupies a lot of machine space and increases the product cost.

[0005] In summary, a centrifugal pump is needed for large flow of water heater without occupying more machine space. UTILITY MODEL CONTENTS

[0006] The first technical problem to be solved by the utility model is to provide a parallel shunt centrifugal pump, which integrates the parallel first water channel and the second water channel in the volute, can meet the need of large flow, can realize pressure boosting, simplifies the water channel, saves the installation space and the product cost.

[0007] The technical scheme adopted by the utility model to solve the above first technical problem is that a parallel shunt centrifugal pump comprises:

[0008] The volute comprises a parallel first water channel and a second water channel;

[0009] A cover plate is connected to the volute, and a water inlet hole is formed in the cover plate, which is communicated with the water inlet ends of the first water channel and the second water channel.

[0010] A impeller assembly is installed in the interior of the volute to accelerate and pressurize the second water channel.

[0011] A one-way valve is connected to the volute, and the water inlet end of the one-way valve is communicated with the water outlet end of the first water channel to control the water flow direction of the first water channel and prevent reverse flow.

[0012] According to an embodiment of the present application, the volute is internally provided with a partition plate, the partition plate separates the interior of the volute into a first cavity and a second cavity, the partition plate is provided with a water passing hole, so that the liquid delivered by the water inlet hole can enter the first cavity and the second cavity respectively.

[0013] The outer periphery of the volute is respectively provided with a first water outlet corresponding to the first cavity and a second water outlet corresponding to the second cavity, the first water outlet and the second water outlet are independent of each other, and the water inlet end of the one-way valve is communicated with the first water outlet.

[0014] The first cavity and the first water outlet form the first water channel, and the second cavity and the second water outlet form the second water channel.

[0015] According to an embodiment of the present application, the volute is cylindrical, and the volute is further provided with a water outlet pipe, the water inlet end of the water outlet pipe is connected to the water outlet ends of the first water outlet and the second water outlet, and the water outlet end of the water outlet pipe extends along the tangential direction of the outer periphery of the volute.

[0016] According to an embodiment of the present application, the water inlet end of the water outlet pipe is connected with a partition block, the partition block is provided with a first water hole corresponding to the first water outlet and a second water hole corresponding to the second water outlet, the first water hole and the first water hole are independent of each other, the one-way valve is inserted into the first water hole, and the partition block is connected with a mounting plate for fixing the one-way valve.

[0017] According to an embodiment of the present application, the inner diameter of the first water hole is 10-15 mm, the inner diameter of the second water hole is 6-10 mm, and the inner diameter of the water outlet pipe is 15-25 mm.

[0018] According to an embodiment of the utility model, wherein, first cavity is equipped with first opening far from second cavity side, second cavity is equipped with second opening far from first cavity side, the cover plate sealed connection with first opening, the impeller assembly is inserted second cavity through second opening, the impeller assembly still is connected with the motor for driving its movement.

[0019] According to an embodiment of the utility model, wherein, the motor includes:

[0020] The machine base is sealed and connected to the second opening;

[0021] The inner shell is provided in the interior of the machine base;

[0022] The rotating shaft is connected to one end of the inner shell, and the other end extends to the outside of the machine base and is connected to the cover plate;

[0023] The stator is connected between the machine base and the inner shell;

[0024] The rotor is located in the interior of the inner shell, and is connected to the side of the impeller assembly close to the inner shell, and can rotate around the rotating shaft under the action of the stator.

[0025] According to an embodiment of the utility model, wherein, the cover plate includes:

[0026] The cover plate body is provided with the water inlet hole;

[0027] The connecting seat includes at least one connecting rod and a connecting block, one end of each connecting rod is connected to the side of the cover plate body close to the impeller, and the other end is connected to the connecting block, the connecting block is provided with a connecting groove with an opening facing the rotating shaft, and the other end of the rotating shaft can be inserted into the connecting groove.

[0028] According to an embodiment of the utility model, wherein, the impeller assembly includes:

[0029] The impeller is disc-shaped, and is provided with a plurality of blades arranged along the circumference

[0030] The hub is connected to the side of the impeller away from the cover plate, and the rotor is embedded in the interior of the side of the hub away from the impeller;

[0031] The shaft sleeve is sleeved between the rotating shaft and the hub, and the top of the shaft sleeve is sealed and connected to the connecting block.

[0032] According to an embodiment of the utility model, wherein, the cover plate body is provided with a reinforcing rib away from the impeller assembly.

[0033] Compared with the prior art, the utility model has the following advantages or beneficial effects:

[0034] The utility model discloses a first water channel second water channel integration in the volute can meet the need of large flow, also can realize pressure boost, simplify waterway, save installation space and product cost. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above and other features and advantages of the present utility model will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0036] Figure 1 It is the structural schematic diagram of conventional centrifugal pump.

[0037] Figure 2 It is the schematic diagram of water pump parallel water flow.

[0038] Figure 3 It is the schematic diagram of water pump open pump water flow.

[0039] Figure 4 It is the schematic diagram of parallel shunt centrifugal pump according to an example embodiment.

[0040] Figure 5 It is the explosion schematic diagram of parallel shunt centrifugal pump according to an example embodiment.

[0041] Figure 6 It is the sectional view of parallel shunt centrifugal pump according to an example embodiment.

[0042] Figure 7 It is the schematic diagram of volute according to an example embodiment.

[0043] Figure 8 It is the schematic diagram of cover plate according to an example embodiment.

[0044] Figure 9 It is the sectional view of parallel shunt centrifugal pump at first cavity according to an example embodiment.

[0045] Figure 10 It is the sectional view of parallel shunt centrifugal pump at second cavity according to an example embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0047] 1, volute;100, first cavity;101, second cavity;11, partition;12, first water outlet;13, second water outlet;14, water outlet pipe;141, separation block;1411, first water hole;1412, second water hole;142, mounting plate;15, sealing groove;16, sealing ring;17, first mounting hole;

[0048] 2, cover plate; 20, water inlet hole; 21, cover plate body; 22, connecting seat; 221, connecting rod; 222, connecting block; 2221, connecting groove; 23, reinforcing rib; 24, second mounting hole;

[0049] 3, impeller assembly; 31, impeller; 311, blade; 32, hub; 33, shaft sleeve; 34, gasket;

[0050] 4, check valve;

[0051] 5, motor; 51, base; 511, third mounting hole; 52, inner shell; 53, rotating shaft; 54, stator; 55, rotor. DETAILED DESCRIPTION

[0052] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and description of the same elements will be omitted from description of subsequent figures.

[0053] The use of the terms "one", "a", "the" and "said" are used to indicate that there is one or more of the items / elements / objects etc.; the use of the terms "include" and "have" are used to indicate an open inclusive meaning and that there can be additional items / elements / objects etc. other than those listed.

[0054] The embodiment of the utility model provides a kind of parallel shunt centrifugal pump, such as Figures 3-10As shown, the centrifugal pump comprises a volute (1), a cover plate (2), an impeller assembly (3) and a one-way valve (4), the volute (1) comprises a first water channel and a second water channel in parallel, the cover plate (2) is connected to the volute (1) and is provided with a water inlet hole (20) for communicating the water inlet ends of the first water channel and the second water channel, the impeller assembly (3) is installed in the interior of the volute (1) to accelerate and pressurize the second water channel, and the one-way valve (4) is connected to the volute (1) and has a water inlet end communicated with the water outlet end of the first water channel to control the water flow direction of the first water channel and prevent reverse flow.

[0055] In one preferred embodiment of the utility model, as shown in Figures 4-7 , 9, 10 the volute (1) is internally provided with a partition plate (11), the partition plate (11) divides the interior of the volute (1) into a first cavity (100) and a second cavity (101), the partition plate (11) is provided with a water passing hole (111) to enable the liquid delivered by the water inlet hole (20) to enter the first cavity (100) and the second cavity (101) respectively, the outer periphery of the volute (1) is provided with a first water outlet (12) corresponding to the first cavity (100) and a second water outlet (13) corresponding to the second cavity (101) respectively, the first water outlet (12) and the second water outlet (13) are independent of each other, and the water inlet end of the one-way valve (4) is communicated with the first water outlet (12); wherein the first cavity (100) and the first water outlet (12) form the first water channel, and the second cavity (101) and the second water outlet (13) form the second water channel. Figure 2 、 4, 6, 8, the baffle (11) is shown, the inner portion of the volute (1) is divided into two cavities respectively first cavity (100) and second cavity (101), wherein the first cavity (100) is communicated with the water inlet end of one-way valve (4) by first water outlet (12), so that one-way valve (4) can control the on-off of the first water channel, when large flow is needed, one-way valve (4) is opened, liquid can flow out from the first water channel and the second water channel;When the liquid is pressurized, one-way valve (4) is closed, impeller assembly (3) is started and centrifugal pressurization is carried out on the liquid in the second water channel and is delivered to the outside of volute 1 via second water outlet (13), to meet the needs of increasing flow and lift.

[0056] In a preferred embodiment of the utility model, as shown in Figures 4-7 , 9, 10, the volute (1) is cylindrical, the volute (1) is further provided with a water outlet pipe (14), the water inlet end of the water outlet pipe (14) is connected to the water outlet end of the first water outlet (12) and the second water outlet (13), and the water outlet end of the water outlet pipe (14) extends along the tangential direction of the outer periphery of the volute 1. In the application, the volute (1) and the water outlet pipe (14) are integrally formed by high-strength plastic injection molding, as shown in Figure 1 、 7 , 8, the water outlet direction of the water outlet pipe (14) is consistent with the natural extension direction of the flow passage of the volute 1, which can reduce the impact and turbulence when the fluid is diverted, improve the conversion efficiency of kinetic energy to static pressure energy, optimize the fluid dynamics performance, reduce energy loss, and improve the lift and efficiency.

[0057] In a preferred embodiment of the utility model, as shown in Figures 4-7The water outlet pipe (14) shown in 9, 10 is connected with a partition block (141), the partition block (141) is provided with a first water outlet hole (1411) corresponding to the first water outlet (12) and a second water outlet hole (1412) corresponding to the second water outlet (13), the first water outlet hole (1411) and the first water outlet hole (1411) are independent of each other, the one-way valve (4) is inserted into the first water outlet hole (1411), and the partition block (141) is connected with a mounting plate (142) for fixing the one-way valve (4). The water outlet pipe (14) and the partition block (141) are integrally formed, the first water outlet hole (1411) and the second water outlet hole (1412) independent of each other are arranged through the partition block (141), the first water passage and the second water passage can be independently drained, different working condition requirements (such as high flow / low lift, low flow / high lift) can be adapted, flow dynamic regulation is realized, system compatibility under complex working conditions is met, fluid distribution is realized, turbulence and local resistance are reduced, and energy conversion efficiency is improved. Specifically, the impeller (31) of the impeller assembly (3) is in the second cavity (101), when the impeller (31) does not rotate, liquid flows from the water inlet hole (20) into the volute (1), a part of the tap water flows to the water outlet pipe 14 through the first cavity (100), the first water outlet (12) and the one-way valve (4), and another part of the tap water flows out of the water outlet pipe 14 through the second cavity (101), the second water outlet (13) and the second water outlet hole (1412), that is, the tap water flows through the parallel first water passage and second water passage, has a large water flow, is not throttled by the pump second water outlet (13), is equivalent to Figure 2 The water pump parallel waterway shown in 9, 10. Figure 10 When the impeller (31) rotates, the second cavity (101) forms a negative pressure, water in the water inlet (21) of the front cover (2) is sucked into the second cavity (101) through the center hole (14), is pressurized by centrifugal force and flows out through the second water outlet (13) and the second water outlet hole (1412) on the volute (1); at the same time, the one-way valve (4) prevents the high-pressure water flowing out of the second water outlet hole (1412) from flowing back to the first cavity (100), realizes the circulation or pressurization function, and is equivalent to Figure 3 The water pump parallel waterway shown in 9, 10.

[0058] In one preferred embodiment of the utility model, as shown in Figures 4-7The inner diameter of the first water outlet hole (1411) shown in 9, 10 is 10-15 mm, the inner diameter of the second water outlet hole (1412) is 6-10 mm, and the inner diameter of the water outlet pipe (14) is 15-25 mm. In the present application, the outer diameter of the volute 1 is not less than 40 mm, the inner diameter of the first water outlet hole (1411) is 10-15 mm, which can ensure sufficient water output, and the inner diameter of the second water outlet hole (1412) is less than that of the first water outlet hole (1411) and is 6-10 mm. The purpose of this design is to increase the water pump head by reducing the inner diameter of the water outlet.

[0059] In a preferred embodiment of the present application, as shown in Figures 2-5 , 7, 8, the first cavity (100) is provided with a first opening away from the second cavity (101), the second cavity (101) is provided with a second opening away from the first cavity (100), the cover plate (2) is sealingly connected with the first opening, and the impeller assembly (3) is inserted into the second cavity (101) through the second opening. The impeller assembly (3) is also connected with a motor (5) for driving it to move. The motor (5) drives the impeller 31 on the impeller assembly (3) in the second cavity (101) to rotate, a negative pressure is formed in the second cavity (101), and the stored water in the second cavity (101) is sprayed outward under the action of centrifugal force. At the same time, the one-way valve (4) prevents the high-pressure water flowing out of the second water outlet hole (1412) from flowing back to the first cavity (100), thereby realizing the circulation or pressurization function.

[0060] In a preferred embodiment of the present application, as shown in Figures 4-7The motor (5) shown in the figures 9, 10 comprises a base (51), an inner shell (52), a rotating shaft (53), a stator (54) and a rotor (55), the base (51) is sealingly connected to the second opening; the inner shell (52) is arranged inside the base (51); one end of the rotating shaft (53) is connected to the inner shell (52), the other end of the rotating shaft (53) extends outside the base (51) and is connected to the cover plate (2), the stator (54) is connected between the base (51) and the inner shell (52), the rotor (55) is located inside the inner shell (52) and is connected to the impeller assembly (3) near one side of the inner shell (52) and can rotate around the rotating shaft (53) under the action of the stator (54). In the application, the base (51) and the inner shell (52) are both hollow shell structures with one end open, the base (51) and the inner shell (52) are also cylindrical, the inner diameter of the inner shell (52) is slightly larger than the outer diameter of the hub (32), the open ends of the base (51) and the inner shell (52) correspond to the second opening of the volute (1), and the open end of the inner shell (52) is provided with an outwardly bent flange, the flange cover is arranged on and connected to the open end of the base (51), and a closed annular mounting cavity is formed by the base (51), the inner shell (52) and the flange, the stator (54) is arranged inside the annular mounting cavity, one end of the rotating shaft (53) is connected to the bottom of the inner shell (52), the other end is inserted into the connecting groove (2221) on the cover plate (2) upward, the rotor (55) is connected to the impeller assembly (3), the stator (54) is used for generating an alternating magnetic field, under the action of the stator (54), the rotor (55) can drive the impeller (31) to rotate at high speed around the rotating shaft (53) to centrifugally supercharge the liquid entering the second cavity (101). In addition,

[0061] Preferably, the sealing grooves (15) are arranged at both ends of the volute (1) and the sealing rings (16) are arranged in the sealing grooves (15); when the motor (5) and the volute (1) are assembled, the sealing rings (16) are pressed against the flanges (521) of the inner shells (52) to ensure the sealing of the motor (5) and the volute (1); preferably, the sealing groove (15) corresponding to the motor (5) is a two-step groove, the sealing ring (16) is connected to the first step, the flange is provided with a limiting protrusion corresponding to the second step, the limiting protrusion abuts against the step surface of the second step to further align and limit the inner shell (52) and the volute (1). In addition, the cover plate (2) and the volute (1) are also sealingly connected through the sealing grooves (15) and the sealing rings (16).

[0062] In a preferred embodiment of the utility model, as shown in the figures 9, 10, Figures 4-8The cover plate (2) shown comprises a cover plate body (21) and a connecting base (22), the cover plate body (21) is provided with the water inlet hole (20), the connecting base (22) comprises at least one connecting rod (221) and a connecting block (222), one end of each connecting rod (221) is connected to one side of the cover plate body (21) close to the impeller (31), the other end is connected to the connecting block (222), the connecting block (222) is provided with a connecting groove (2221) with an opening facing the rotating shaft (53), and the other end of the rotating shaft (53) can be inserted into the connecting groove (2221). In the application, the cover plate body (21) is disc-shaped, the outer diameter thereof is the same as the outer diameter of the volute (1), the cover plate body (21) is connected to the first opening, the cover plate body (21) is provided with the water inlet hole (20), and the cover plate body (21) and the connecting base (22) are integrally formed by high-strength plastic injection molding. The connecting rod (221) and the connecting block (222) are inserted into the second cavity (101), and the rotating shaft (53) is inserted into the connecting groove (2221).

[0063] Preferably, the middle part of the cover plate body (21) is provided with a protrusion which can be inserted into the first opening downward, the protrusion is inserted into the first opening, the outer edge of the cover plate body (21) abuts against the sealing ring (16), and the sealing connection assembly of the cover plate (2) and the volute (1) is completed.

[0064] Preferably, a plurality of first mounting holes (17) are arranged on the outer periphery of the volute (1) and distributed along the circumference thereof, the outer periphery of the cover plate body (21) is provided with a second mounting hole (24) corresponding to each first mounting hole (17), and the outer periphery of the machine base (51) is provided with a third mounting hole (511) corresponding to each first mounting hole (17), and the first mounting hole (17), the second mounting hole (24) and the third mounting hole (511) are corresponded one by one and fixed by using screws during installation.

[0065] In one preferred embodiment of the utility model, as shown in Figures 2-5 The impeller assembly (3) shown in the drawings comprises an impeller (31), a hub (32) and a shaft sleeve (33), the impeller (31) is disc-shaped, a plurality of blades (311) are arranged on the impeller (31) and arranged along the circumference, the hub (32) is connected to one side of the impeller (31) away from the cover plate (2), and the rotor (55) is embedded in the inside of one side of the hub (32) away from the impeller (31); the shaft sleeve (33) is sleeved between the rotating shaft (53) and the hub (32), and the top of the shaft sleeve (33) is sealingly connected with the connecting block (222). In the application, the outer diameter of the impeller (31) is slightly smaller than the inner diameter of the volute (1), the arc-shaped blades (311) are arranged on the impeller (31) and arranged along the circumference, so that the vortex effect is increased. The rotor (55) is embedded in the inside of one side of the hub (32) away from the impeller (31), the rotor (55) can drive the hub (32) and the impeller (31) to rotate, centrifugal supercharging is realized, and water in the second cavity (101) is sprayed out.

[0066] In addition, the shaft sleeve (33) is arranged on the outer periphery of the rotating shaft 53 to ensure that the impeller (31) rotates along the axis of the rotating shaft 53. In addition, the shaft sleeve (33) and the connecting block 22 between the cover plate 2 are provided with a sealing gasket 34.

[0067] In a preferred embodiment of the present application, as shown in Figures 4-8 The side of the cover plate body (21) away from the impeller assembly (3) is provided with a reinforcing rib (23). The reinforcing rib (23) is divided into two categories, the first category is a ring-shaped plate arranged concentrically around the outer periphery of the air inlet hole 20, and the second category is a reinforcing plate arranged radially along the air inlet hole 20. One end of each reinforcing plate is connected to the outer wall of the air inlet hole 20, and the other end is connected to a plurality of ring-shaped plates. The reinforcing rib (23) is arranged to improve the structural strength of the cover plate 2.

[0068] Preferably, the cover plate body (21), the connecting seat (22) and the reinforcing rib (23) are injection molded by high-strength plastic, which can reduce the weight while maintaining the mechanical properties, and is conducive to efficient and large-scale production and installation, and improves the production efficiency.

[0069] The specific principle is as follows:

[0070] In this embodiment, the impeller (31) of the impeller assembly (3) is in the second cavity (101) of the volute (1). The second cavity (101) and the first cavity (100) of the volute (1) form a parallel waterway. As shown in Figure 7 When the impeller (31) does not rotate, the tap water flows into the water inlet hole (20) of the front cover (2) and is divided in the volute (1). Part of the tap water flows to the water outlet pipe 14 through the first cavity (100), the first water outlet (12) and the one-way valve (4). Another part of the tap water flows out of the water outlet pipe 14 through the second cavity (101), the second water outlet (13) and the second water outlet hole (1412). That is, the tap water flows through the parallel first water channel and second water channel, which has a large water flow and is not throttled by the second water outlet (13) of the pump. It is equivalent to Figure 2 As shown in the parallel waterway of the water pump. As shown in Figure 10 When the impeller (31) rotates, the second cavity (101) forms a negative pressure, which draws the water in the water inlet (21) of the front cover (2) into the second cavity (101) through the central hole (14) and flows out through the second water outlet (13) and the second water outlet hole (1412) on the volute (1) after centrifugal pressure. At the same time, the one-way valve (4) prevents the high-pressure water flowing out of the second water outlet hole (1412) from flowing back into the first cavity (100), realizing the functions of circulation or pressure increase. It is equivalent to Figure 3 As shown in the parallel waterway of the water pump.

[0071] In the embodiments of the present application, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0072] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0073] In the description of the present application, the terms "one embodiment", "one preferred embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] The above is only the preferred embodiment of the present application, and is not used to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A parallel shunt centrifugal pump characterized by, The utility model relates to a water turbine, comprising: A volute (1) comprising a first water channel and a second water channel in parallel; A cover plate (2) connected to the volute (1) and having a water inlet hole (20) formed thereon, the water inlet hole (20) being in communication with the water inlet ends of the first water channel and the second water channel; A impeller assembly (3) installed inside the volute (1) to accelerate and pressurize the second water channel; A one-way valve (4) connected to the volute (1) and having a water inlet end in communication with the water outlet end of the first water channel to control the water flow direction of the first water channel and prevent reverse flow.

2. The parallel split centrifugal pump of claim 1, wherein, The volute (1) is internally provided with a partition plate (11) separating the interior of the volute (1) into a first cavity (100) and a second cavity (101), the partition plate (11) being provided with a water passing hole (111) so that the liquid delivered by the water inlet hole (20) can enter the first cavity (100) and the second cavity (101) respectively; The volute (1) is externally provided with a first water outlet (12) corresponding to the first cavity (100) and a second water outlet (13) corresponding to the second cavity (101), the first water outlet (12) and the second water outlet (13) being independent of each other, and the water inlet end of the one-way valve (4) being in communication with the first water outlet (12); The first cavity (100) and the first water outlet (12) form the first water channel, and the second cavity (101) and the second water outlet (13) form the second water channel.

3. The parallel split centrifugal pump of claim 2, wherein, The volute (1) is cylindrical, and the volute (1) is further provided with a water outlet pipe (14), the water inlet end of the water outlet pipe (14) being connected to the water outlet ends of the first water outlet (12) and the second water outlet (13), and the water outlet end of the water outlet pipe (14) extending along the tangent direction of the volute (1).

4. The parallel split centrifugal pump of claim 3, wherein, The water inlet end of the water outlet pipe (14) is connected with a partition block (141), the partition block (141) being provided with a first water outlet hole (1411) corresponding to the first water outlet (12) and a second water outlet hole (1412) corresponding to the second water outlet (13), the first water outlet hole (1411) and the second water outlet hole (1412) being independent of each other, the one-way valve (4) being inserted into the first water outlet hole (1411), and the partition block (141) being connected with a mounting plate (142) for fixing the one-way valve (4).

5. The parallel split centrifugal pump of claim 4, wherein, The inner diameter of the first water outlet hole (1411) is 10-15 mm, the inner diameter of the second water outlet hole (1412) is 6-10 mm, and the inner diameter of the water outlet pipe (14) is 15-25 mm.

6. The parallel split centrifugal pump of claim 2, wherein, The first cavity (100) is provided with a first opening on the side away from the second cavity (101), the second cavity (101) is provided with a second opening on the side away from the first cavity (100), the cover plate (2) is sealingly connected with the first opening, and the impeller assembly (3) is inserted into the second cavity (101) through the second opening.

7. The parallel split centrifugal pump of claim 6, wherein, The motor (5) comprises: a base (51) sealingly connected to the second opening; an inner shell (52) arranged inside the base (51); a rotating shaft (53) connected to one end of the inner shell (52) and extending to the outside of the base (51) and connected to the cover plate (2); a stator (54) connected between the base (51) and the inner shell (52); a rotor (55) located inside the inner shell (52) and connected to one side of the impeller assembly (3) close to the inner shell (52) and rotatable around the rotating shaft (53) under the action of the stator (54).

8. The parallel split centrifugal pump of claim 7, wherein, The cover plate (2) comprises: a cover plate body (21) provided with the water inlet hole (20) thereon; a connecting seat (22) comprising at least one connecting rod (221) and a connecting block (222), one end of each connecting rod (221) is connected to one side of the cover plate body (21) close to the impeller (31), the other end is connected to the connecting block (222), the connecting block (222) is provided with a connecting groove (2221) with an opening facing the rotating shaft (53), and the other end of the rotating shaft (53) can be inserted into the connecting groove (2221).

9. The parallel split centrifugal pump of claim 8, wherein, The impeller assembly (3) comprises: an impeller (31) in the shape of a disc provided with a plurality of blades (311) arranged along the circumference thereof a hub (32) connected to one side of the impeller (31) away from the cover plate (2), the rotor (55) is embedded in the inside of the hub (32) away from the impeller (31); a shaft sleeve (33) sleeved between the rotating shaft (53) and the hub (32), and sealingly connected to the connecting block (222) at the top.

10. The parallel split centrifugal pump of claim 8, wherein, The cover plate body (21) is provided with a reinforcing rib (23) on the side away from the impeller assembly (3).

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