Large-flow well head centrifugal pump

Abstract

The utility model discloses a large-flow well head centrifugal pump which comprises a volute, a water inlet is integrally formed in the front side of the volute, an impeller is arranged in an inner cavity of the volute, the outer wall of the impeller is attached to the inner wall of the volute, a motor is arranged on the side, away from the water inlet, of the volute, a connecting frame is installed between the motor and the volute, and the rotating end of the motor is connected with the impeller. The utility model relates to the technical field of fluid machinery and agricultural machinery, in particular to a high-flow well head centrifugal pump, which is characterized in that: 1) the pump structure adopts the combined design of a centrifugal pump and a well pumping component, and adopts a novel water conservancy model design, and the water conservancy model can solve the problems of low efficiency and small flow; the motor is a single-phase two-stage asynchronous motor, the performance is reliable and stable, the efficiency is high, and the core competitiveness of the agricultural pump market is greatly improved based on the two points.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid machinery and agricultural machinery, in particular to a large-flow wellhead centrifugal pump. Background Art

[0002] As an important equipment in modern agricultural production, agricultural water pumps play a vital role in ensuring crop irrigation, flood control and drainage, aquaculture and other fields. However, with the acceleration of agricultural modernization, agricultural water pumps have also exposed some problems and deficiencies in practical applications, which urgently need to be solved through technological innovation and improvement. The application of agricultural water pumps in agricultural production is becoming more and more extensive, which not only improves the efficiency of agricultural production, but also improves the living standards of farmers.

[0003] However, there are also some problems and shortcomings in the practical application of agricultural water pumps. First, the energy consumption of agricultural water pumps is relatively high. During the operation of agricultural water pumps, a large amount of electrical energy is required, which not only increases the economic cost of agricultural production, but also puts great pressure on the environment. Therefore, improving the energy efficiency of agricultural water pumps and reducing energy consumption are important directions for the development of agricultural water pump technology. Second, the adaptability of agricultural water pumps is poor. In practical applications, agricultural water pumps need to deal with different terrains, water sources and crop types, etc., and users sometimes have difficulty in diverting water when using them. Existing agricultural water pump products often cannot adapt well to these complex environments. Third, the maintenance and maintenance of agricultural water pumps is difficult. After a long period of operation, agricultural water pumps are prone to failure and wear, but existing agricultural water pump products often lack effective maintenance and maintenance measures. Therefore, improving the reliability and durability of agricultural water pumps and reducing the difficulty of maintenance and maintenance are another important direction for the development of agricultural water pump technology.

[0004] In view of the above problems, the improvement and development of agricultural water pump technology should focus on the following aspects: First, improve the energy efficiency of agricultural water pumps. By adopting high-efficiency motors and optimizing pump body design, the energy consumption of agricultural water pumps can be reduced and energy efficiency can be improved. Secondly, improve the adaptability of agricultural water pumps so that agricultural water pumps can better adapt to different terrains, water sources and crop types. Add water diversion devices to the water pump structure to provide users with convenient water diversion. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a large-flow wellhead centrifugal pump, which adopts a new hydraulic model design and can solve the problems of low efficiency and small flow. At the same time, it is equipped with a well pumping combination to facilitate users to draw water.

[0006] To achieve the above objectives, the present utility model is realized through the following technical solutions: A large-flow wellhead centrifugal pump includes a volute. An inlet is integrally formed on the front side of the volute. An impeller is disposed in the inner cavity of the volute, and the outer wall of the impeller fits with the inner wall of the volute. A motor is provided on one side of the volute away from the inlet. A coupling frame is installed between the motor and the volute, and the rotating end of the motor is connected to the impeller. A well pumping combination is installed on the top water outlet end of the volute.

[0007] Preferably, the volute includes an impeller cavity disposed at the center. The impeller cavity is circular and is in communication with the inlet. The impeller is placed in the impeller cavity. A flowing water cavity is integrally formed on the outer ring surface of the impeller cavity. The flowing water cavity is arranged in a spiral shape on the outer circumference of the impeller cavity. The flowing water cavity is in communication with the impeller cavity through a through groove. The through groove is a circular arc with a central angle greater than 270 degrees. The top end of the flowing water cavity is the water outlet end of the volute and is in communication with the well pumping combination.

[0008] Preferably, the impeller includes a wheel body placed in the volute. A cavity is formed in the wheel body. A water inlet pipe is integrally formed on one side of the wheel body close to the inlet. The water inlet pipe is in communication with the cavity and fits with the inner wall of the inlet. A number of grooves are evenly formed on the outer ring surface of the wheel body. The grooves are in communication with the cavity. A number of blades are evenly installed in the cavity. The blades are distributed in a spiral shape in the cavity.

[0009] Preferably, a pump shaft is inserted on one side of the wheel body close to the motor and is connected to the rotating end of the motor below. A mechanical seal is provided between the pump shaft and the wheel body.

[0010] Preferably, the well pumping combination includes a cylinder body arranged at the top water outlet end of the volute. An outlet is integrally formed on the front side of the top of the cylinder body. A connecting shaft is provided on the rear side of the top of the cylinder body. A pressing handle is movably installed on the connecting shaft. A cylinder head is installed on the top of the cylinder body. A pressing rod is movably installed at the front end of the pressing handle. The pressing rod passes through the cylinder head and is inserted into the cylinder body. A well pumping valve plate is installed at the lower end of the pressing rod. The well pumping valve plate is in contact with the inner wall of the cylinder body.

[0011] Preferably, a check valve is installed on the lower inner side of the cylinder body and is placed at the water outlet end of the volute. Beneficial effects

[0012] The utility model provides a large-flow wellhead centrifugal pump, which has the following beneficial effects: for the large-flow wellhead centrifugal pump, 1) the pump structure of the present invention adopts a combined design of a centrifugal pump and a well pumping component, and a new hydraulic model is adopted. This hydraulic model can solve the problems of low efficiency and small flow rate;

[0013] 2) The motor of the present invention selects a single-phase two-pole asynchronous motor, which has reliable performance, stability and high efficiency;

[0014] 3) Based on the above two points, the core competitiveness of the agricultural pump market is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a left-view structural schematic diagram of the present utility model.

[0017] Figure 3 It is a schematic structural diagram of the impeller of the present utility model.

[0018] Figure 4 It is a left-view structural schematic diagram of the impeller of the present utility model.

[0019] In the figure: 1, water inlet; 2, mechanical seal; 3, impeller; 301, wheel body; 302, inlet pipe; 303, blade; 4, pump shaft; 5, coupling; 6, motor; 7, check valve; 8, well pumping valve piece; 9, water outlet; 10, cylinder head; 11, volute; 111, impeller cavity; 112, water flow cavity; 113, through groove; 12, cylinder block; 13, pressing handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] Those skilled in the art connect all the electrical components in this case to their adapted power supplies through wires and should select a suitable controller according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be made.

[0022] Please refer to Figures 1-4, the present utility model provides a technical solution: a large-flow wellhead centrifugal pump, including a volute 11, an inlet 1 is integrally formed on the front side of the volute 11, an impeller 3 is arranged in the inner cavity of the volute 11, the outer wall of the impeller 3 fits with the inner wall of the volute 11, a motor 6 is arranged on one side of the volute 11 away from the inlet 1, a coupling frame 5 is installed between the motor 6 and the volute 11, the rotating end of the motor 6 is connected to the impeller 3, and a well pumping combination is installed on the top water outlet end of the volute 11;

[0023] Specifically, it is assembled into an electric pump structure by main components such as an impeller 3, a pump shaft 4, a volute 11, a coupling frame 5, a motor 6, and a well pumping combination; the combined design principle of the centrifugal pump and the well pumping component can solve the problems of low efficiency, small flow rate, and user water diversion.

[0024] Embodiment 1: The volute 11 includes an impeller 3 cavity arranged at the center, the impeller 3 cavity is circular, the impeller 3 cavity is communicated with the inlet 1, the impeller 3 is arranged in the impeller 3 cavity, a flowing water cavity 112 is integrally formed on the outer ring surface of the impeller 3 cavity, the flowing water cavity 112 is arranged in a spiral shape on the outer circumference of the impeller 3 cavity, the flowing water cavity 112 is communicated with the impeller 3 cavity through a through groove 113, the through groove 113 is a circular arc with a central angle greater than 270 degrees, and the top end of the flowing water cavity 112 is the water outlet end of the volute 11 and is communicated with the well pumping combination.

[0025] Embodiment 2: The impeller 3 includes a wheel body 301, the wheel body 301 is arranged in the volute 11, a cavity is opened in the wheel body 301, a water inlet pipe 302 is integrally formed on one side of the wheel body 301 close to the inlet 1, the water inlet pipe 302 is communicated with the cavity, the water inlet pipe 302 fits with the inner wall of the inlet 1, a plurality of grooves are evenly opened on the outer ring surface of the wheel body 301, the grooves are communicated with the cavity, and a plurality of vanes 303 are evenly installed in the cavity, and the vanes 303 are distributed in a spiral shape in the cavity.

[0026] A pump shaft 4 is inserted on one side of the wheel body 301 close to the motor 6, the pump shaft 4 is connected to the rotating end of the motor 6, and a mechanical seal 2 is arranged between the pump shaft 4 and the wheel body 301;

[0027] Specifically, after the inlet 1 is connected to the water source, the water at the inlet 1 is pumped out through the well pumping combination and enters the volute 11. As the impeller 3 rotates, the liquid is thrown out of the water outlet end under the action of centrifugal force and flows out from the water outlet 9 of the well pumping combination.

[0028] Embodiment 3: The well pumping combination includes a cylinder block 12 provided at the water outlet end at the top of the volute 11. An outlet 9 is integrally formed at the front side of the top of the cylinder block 12. A connecting shaft is provided at the rear side of the top of the cylinder block 12. A pressing handle 13 is movably installed on the connecting shaft. A cylinder head 10 is installed at the top of the cylinder block 12. A pressing rod is movably installed at the front end of the pressing handle 13. The pressing rod passes through the cylinder head 10 and inserts into the cylinder block 12. A well pumping valve plate 8 is installed at the lower end of the pressing rod. The well pumping valve plate 8 is in contact with the inner wall of the cylinder block 12.

[0029] A check valve 7 is installed at the lower inner side of the cylinder block 12. The check valve 7 is arranged at the water outlet end of the volute 11.

[0030] Specifically, this structure is similar to the structure of a rural well. By continuously pulling the pressing handle 13 to move the well pumping valve plate 8 up and down, negative pressure is generated in the cylinder block 12, and the water is pumped out in cooperation with the motor 6 and the impeller 3.

[0031] Specifically, water enters the wheel body 301 from the water inlet 1. Then the wheel body 301 is driven to rotate by the motor 6. The water is pushed from the impeller 3 cavity along the through groove 113 through the blades 303 into the flowing water cavity 112, and enters the cylinder block 12 from the top of the flowing water cavity 112 and is pumped out.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-flow wellhead centrifugal pump, characterized in that, It includes a volute (11), an inlet (1) is integrally formed on the front side of the volute (11), an impeller (3) is arranged in the inner cavity of the volute (11), the outer wall of the impeller (3) is in contact with the inner wall of the volute (11), a motor (6) is arranged on one side of the volute (11) away from the inlet (1), a coupling frame (5) is installed between the motor (6) and the volute (11), the rotating end of the motor (6) is connected to the impeller (3), and a well pumping combination is installed on the top water outlet end of the volute (11).

2. The large-flow wellhead centrifugal pump according to claim 1, wherein , the volute (11) includes an impeller (3) cavity arranged at the center, the impeller (3) cavity is circular, the impeller (3) cavity is communicated with the inlet (1), the impeller (3) is placed in the impeller (3) cavity, a flowing water cavity (112) is integrally formed on the outer ring surface of the impeller (3) cavity, the flowing water cavity (112) is arranged in a spiral shape on the outer circumference of the impeller (3) cavity, the flowing water cavity (112) is communicated with the impeller (3) cavity through a through groove (113), the through groove (113) is an arc with a central angle greater than 270 degrees, and the top end of the flowing water cavity (112) is the water outlet end of the volute (11) and is communicated with the well pumping combination.

3. The large-flow wellhead centrifugal pump according to claim 1, characterized in that , the impeller (3) includes a wheel body (301), the wheel body (301) is placed in the volute (11), a cavity is opened in the wheel body (301), a water inlet pipe (302) is integrally formed on one side of the wheel body (301) close to the inlet (1), the water inlet pipe (302) is communicated with the cavity, the water inlet pipe (302) is in contact with the inner wall of the inlet (1), a plurality of grooves are evenly opened on the outer ring surface of the wheel body (301), the grooves are communicated with the cavity, and a plurality of blades (303) are evenly installed in the cavity, and the blades (303) are distributed in a spiral shape in the cavity.

4. The large-flow wellhead centrifugal pump according to claim 3, wherein , a pump shaft (4) is inserted on one side of the wheel body (301) close to the motor (6), the pump shaft (4) is connected to the lower part of the rotating end of the motor (6), and a mechanical seal (2) is arranged between the pump shaft (4) and the wheel body (301).

5. The large-flow wellhead centrifugal pump according to claim 1, characterized in that , the well pumping combination includes a cylinder body (12) arranged at the top water outlet end of the volute (11), a water outlet (9) is integrally formed on the front side of the top of the cylinder body (12), a connecting shaft is arranged on the rear side of the top of the cylinder body (12), a pressing handle (13) is movably installed on the connecting shaft, a cylinder cover (10) is installed on the top of the cylinder body (12), a pressing rod is movably installed at the front end of the pressing handle (13), the pressing rod penetrates through the cylinder cover (10) and is inserted into the cylinder body (12), and a well pumping valve plate (8) is installed at the lower end of the pressing rod, and the well pumping valve plate (8) is in contact with the inner wall of the cylinder body (12).

6. The large-flow wellhead centrifugal pump according to claim 5, characterized in that , a check valve (7) is installed on the lower inner side of the cylinder body (12), and the check valve (7) is placed at the water outlet end of the volute (11).

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