A variable cross-section guide channel water pump casing

Abstract

This utility model discloses a variable cross-section guide channel water pump housing, relating to the technical field of water pump accessories. It includes a housing body and an inlet. The top of the housing body has an inspection port with a cover plate. The inlet is located on one side of the housing body, and an outlet is located at one end of the housing body. A sealing groove is provided on the flange face of the outlet, and a rubber sealing ring is placed inside the sealing groove. A guide channel is provided inside the housing body, and the inner wall of the guide channel is coated with a ceramic wear-resistant coating. With this variable cross-section guide channel water pump housing, water enters the impeller from the inlet, accelerates, and then flows into the spirally expanding guide channel inside the housing body. Four guide ribs with gradually varying heights guide the water flow smoothly, reducing eddy current losses and improving hydraulic efficiency. Simultaneously, reduced water flow pulsation lowers vibration amplitude, meeting the energy-saving needs of agricultural irrigation, ensuring stable industrial water delivery, and providing quiet building water supply. It is highly adaptable to various scenarios.

Description

Technical Field

[0001] This utility model relates to the field of water pump accessories technology, specifically a variable cross-section guide channel water pump housing. Background Technology

[0002] The pump casing is the core pressure-bearing and protective component of a water pump. As the mounting carrier for key internal components such as the impeller and shaft seal, it is widely used in agricultural irrigation, industrial circulation, and urban water supply. It is typically made of corrosion-resistant, high-strength materials such as cast iron, stainless steel, or engineering plastics. Internally, it features flow channels, mounting cavities, and sealing structures. It must withstand the pressure of the medium to ensure no leakage, while also guiding the fluid smoothly through the impeller to improve delivery efficiency. The structural design of the casing directly affects the pump's operational stability, impact resistance, and service life, requiring precise matching with internal components to guarantee overall water supply performance.

[0003] Most existing water pump casings adopt a constant cross-section guide channel design. When water flows out of the impeller and enters the constant cross-section guide channel, it is easy to generate eddies and impacts due to sudden changes in flow velocity, which leads to increased energy loss and affects the operational stability and service life of the water pump.

[0004] Therefore, in view of this, we studied and improved the existing structure and its shortcomings, and proposed a variable cross-section guide channel water pump housing. Utility Model Content

[0005] The purpose of this utility model is to provide a variable cross-section guide channel water pump housing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable cross-section guide channel water pump housing, comprising a housing body and an inlet, wherein an inspection port is provided on the top of the housing body and a cover plate is installed on the top of the inspection port, the inlet is located on one side of the housing body and an outlet is provided at one end of the housing body, a sealing groove is provided on the flange end face of the outlet and a rubber sealing ring is placed in the sealing groove, a guide channel is provided inside the housing body and a ceramic wear-resistant coating is provided on the inner wall of the guide channel, and guide ribs are also provided on the inner wall of the guide channel.

[0007] Furthermore, the shell body is volute-shaped and is integrally cast from cast iron.

[0008] Furthermore, positioning holes are evenly distributed around the outer perimeter of the water inlet, and the number of positioning holes is 8.

[0009] Furthermore, the guide channel is spirally expanded around the inner wall of the shell, and the cross-sectional area of ​​the guide channel gradually increases along the water flow direction.

[0010] Furthermore, the thickness of the ceramic wear-resistant coating is 0.1-0.2 mm, and the surface roughness Ra of the ceramic wear-resistant coating is ≤0.8 μm.

[0011] Furthermore, the number of guide ribs is four, and the height of the guide ribs gradually decreases from the inlet end to the outlet end of the guide channel.

[0012] This utility model provides a variable cross-section guide channel water pump housing, which has the following beneficial effects:

[0013] 1. The housing of this utility model is integrally cast from cast iron and is volute-shaped, with strong overall structural integrity, uniform wall thickness, and the ability to stably withstand high pressure from the medium, avoiding deformation or damage to the housing due to pressure fluctuations and ensuring long-term safe operation of the water pump; the eight positioning holes evenly distributed around the outer side of the inlet can achieve precise bolt connection with the inlet pipeline, with high connection firmness, reducing pipeline loosening caused by vibration during water delivery in various scenarios, and improving overall operational stability; the sealing groove of the outlet flange end face has a built-in rubber sealing ring, which has excellent sealing performance and prevents leakage of high pressure medium.

[0014] 2. In this utility model, after the water flows into the impeller through the inlet and is accelerated, it flows into the spirally expanding guide channel inside the housing. Combined with four guide ribs with gradually varying heights, the water flows smoothly, reducing eddy current losses and improving hydraulic efficiency. At the same time, the reduced water flow pulsation can reduce the vibration amplitude, which can meet the energy-saving needs of agricultural irrigation, ensure stable industrial water supply and quiet building water supply, and has strong adaptability to multiple scenarios. Attached Figure Description

[0015] Figure 1 This is a front view of the housing body of a variable cross-section guide channel water pump housing according to the present invention.

[0016] Figure 2 This is a rear cross-sectional view of the housing body of a variable cross-section guide channel water pump housing according to the present invention.

[0017] In the diagram: 1. Shell body; 2. Inspection port; 3. Cover plate; 4. Water inlet; 5. Positioning hole; 6. Water outlet; 7. Sealing groove; 8. Rubber sealing ring; 9. Flow guide groove; 10. Ceramic wear-resistant coating; 11. Guide rib. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0019] like Figure 1 and Figure 2As shown, a variable cross-section guide channel water pump housing includes a housing body 1 and an inlet 4. The top of the housing body 1 is provided with an inspection port 2, and a cover plate 3 is installed on the top of the inspection port 2. The housing body 1 is volute-shaped and is made of cast iron. The inlet 4 is located on one side of the housing body 1, and an outlet 6 is provided at one end of the housing body 1. A sealing groove 7 is provided on the flange end face of the outlet 6, and a rubber sealing ring 8 is placed in the sealing groove 7. Positioning holes 5 are evenly distributed around the outer side of the inlet 4, and the number of positioning holes 5 is 8.

[0020] The specific operation is as follows: The housing body 1 is made of cast iron in one piece and is volute-shaped, with strong overall structural integrity and uniform wall thickness. It can stably withstand the high pressure of the medium and avoid deformation or damage to the housing due to pressure fluctuations, thus ensuring the long-term safe operation of the water pump; The eight positioning holes 5 evenly distributed around the outer side of the inlet 4 can achieve precise bolt connection with the water inlet pipeline, with high connection firmness, reducing the problem of pipeline loosening caused by vibration during water delivery in various scenarios, and improving the overall operational stability; The flange end face sealing groove 7 of the outlet 6 has a built-in rubber sealing ring 8, which has excellent sealing performance and prevents leakage of high pressure medium.

[0021] like Figure 2 As shown, the interior of the shell body 1 is provided with a flow guide trough 9, and the inner wall of the flow guide trough 9 is provided with a ceramic wear-resistant coating 10. The inner wall of the flow guide trough 9 is also provided with guide ribs 11. The flow guide trough 9 spirals and expands around the inner wall of the shell. The cross-sectional area of ​​the flow guide trough 9 gradually increases along the direction of water flow. The thickness of the ceramic wear-resistant coating 10 is 0.1-0.2 mm, and the surface roughness Ra of the ceramic wear-resistant coating 10 is ≤0.8 μm. There are 4 guide ribs 11, and the height of the guide ribs 11 gradually decreases from the inlet end to the outlet end of the flow guide trough 9.

[0022] The specific operation is as follows: after the water flows into the impeller from the inlet 4 and is accelerated, it flows into the spirally expanding guide channel 9 inside the shell body 1. Combined with 4 guide ribs 11 with gradually changing height, the water flows smoothly, reducing eddy current loss and improving hydraulic efficiency. At the same time, the reduction of water flow pulsation can reduce the vibration amplitude, which can not only meet the energy-saving needs of agricultural irrigation, but also ensure the stability of industrial water supply and the quietness of building water supply. It has strong adaptability to multiple scenarios.

[0023] In summary, when using this variable cross-section guide channel water pump housing, after the water pump is started, the medium to be transported enters the housing body 1 from the inlet 4. The positioning hole 5 on the outside of the inlet 4 is precisely connected to the pipeline through bolts, ensuring that the housing body 1 and the pipeline are firmly connected during large-flow agricultural irrigation or continuous industrial water supply, and preventing the pipeline from loosening or falling off due to vibration during the medium transport process.

[0024] After the medium enters, it first flows into the internal impeller mounting cavity and contacts the impeller assembly. The impeller rotates at high speed under the drive mechanism, converting mechanical energy into the kinetic and pressure energy of the medium. Then, the high-speed medium enters the spirally expanding guide channel 9 from the impeller outlet. Because the cross-section of the guide channel 9 gradually increases along the water flow direction, the medium flow velocity decreases steadily, avoiding the eddy current loss of traditional constant cross-section channels. At the same time, the four guide ribs 11 with gradually varying heights on the inner wall of the guide channel 9 further regulate the flow field, ensuring that the medium flows smoothly along the spiral path, which is suitable for the low noise requirements of building water supply. The ceramic wear-resistant coating 10 on the inner wall of the guide channel 9 not only resists the scouring and wear of agricultural water containing mud or industrial media, extending the service life of the shell, but also reduces resistance and improves efficiency with a smooth surface.

[0025] Finally, the optimized medium is discharged through outlet 6, and the rubber sealing ring 8 in the sealing groove 7 ensures that there is no leakage during high-pressure water transmission. Throughout the process, the cast iron integrated volute bears the medium pressure, while the inspection port 2 and cover plate 3 facilitate later maintenance. All links work together to meet the requirements of efficient, stable and durable water transmission in multiple scenarios.

[0026] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A variable cross-section channel pump housing comprising a housing body (1) and a water inlet (4), characterized in that, The top of the housing body (1) is provided with an inspection port (2), and a cover plate (3) is installed on the top of the inspection port (2). The water inlet (4) is located on one side of the housing body (1), and a water outlet (6) is provided at one end of the housing body (1). A sealing groove (7) is provided on the flange end face of the water outlet (6), and a rubber sealing ring (8) is placed in the sealing groove (7). A flow guide groove (9) is provided inside the housing body (1), and a ceramic wear-resistant coating (10) is provided on the inner wall of the flow guide groove (9). A guide rib (11) is also provided on the inner wall of the flow guide groove (9).

2. The variable cross-section guide channel water pump housing according to claim 1, characterized in that, The shell body (1) is volute-shaped and is made of cast iron.

3. The variable cross-section guide channel water pump housing according to claim 1, characterized in that, The water inlet (4) has eight positioning holes (5) evenly distributed around its outer perimeter.

4. The variable cross-section guide channel water pump housing according to claim 1, characterized in that, The guide channel (9) is spirally expanded around the inner wall of the shell, and the cross-sectional area of ​​the guide channel (9) gradually increases along the direction of water flow.

5. The variable cross-section guide channel water pump housing according to claim 1, characterized in that, The thickness of the ceramic wear-resistant coating (10) is 0.1-0.2 mm, and the surface roughness Ra of the ceramic wear-resistant coating (10) is ≤0.8 μm.

6. The variable cross-section guide channel water pump housing according to claim 1, characterized in that, The number of guide ribs (11) is 4, and the height of the guide ribs (11) gradually decreases from the inlet end to the outlet end of the guide channel (9).

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