An ultra-low center high vertical pipeline pump body
By adopting a variable curvature radius and an annular suction chamber design in the vertical pipeline pump, combined with a gradually expanding flat transition and a circular vortex structure, the problem of excessive center height in the vertical pipeline pump is solved, resulting in a more compact design, more stable operation, and lower energy consumption.
Patent Information
- Application Number
- CN202521614955.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-14
- Estimated Expiration
- 2035-07-31
AI Technical Summary
Existing vertical pipeline pumps have a high center height, which cannot meet the needs of special occasions with limited space, and the traditional design leads to serious vibration and noise problems.
By adopting a variable curvature radius and annular water intake chamber design, combined with a gradually expanding flat transition, an elbow-shaped water inlet channel with an ultra-low center height is designed. Baffles and circular vortex structures are introduced into the channel to ensure uniformity and stability of flow velocity.
The overall height of the pump has been reduced, improving installation stability, reducing vibration and noise, saving installation space, reducing construction costs, and improving service life and energy efficiency.
Smart Images
Figure CN224496891U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pump body, specifically a vertical pipeline pump body with an ultra-low center height inlet flow channel. Its elbow-shaped flow channel design combines the design methods of variable curvature radius and annular suction chamber, changing the traditional arc shape to a gradually expanding flat transition, which reduces the center height of the vertical pipeline pump while ensuring the uniformity of flow velocity. Background Technology
[0002] Vertical inline pumps are widely used in building water supply, HVAC, and industrial circulation. During installation, the inlet and outlet diameters are the same and located on the same centerline. This design allows the pump to be installed in the pipeline like a valve, offering advantages such as compact structure, small footprint, and low construction investment.
[0003] The center height of a vertical inline pump, also known as the pump body center height, refers to the vertical distance from the pump body centerline to the mounting foundation plane. It is a crucial geometric parameter of the vertical inline pump, significantly impacting its installation, operation, and maintenance. Its value primarily depends on the design of the pump body's elbow-shaped inlet channel. In certain special operating conditions, such as those with limited space, it is necessary to appropriately reduce the pump body center height.
[0004] Figure 1 Existing vertical pipeline pump structural diagram, Figure 2 Existing pump body structure diagram, Figure 3-1 Schematic diagram of the existing pump body elbow-shaped flow channel water structure. Figure 3-2 for Figure 3-1 As shown in the left view above, the main components of an existing vertical inline pump include the pump body, impeller, pump cover, and motor. The medium enters through the elbow-shaped inlet channel of the pump body, is subjected to centrifugal force generated by the high-speed rotation of the impeller, and is then discharged through the outlet of the pump body. Existing pump bodies use an elbow-shaped inlet channel designed with constant or variable curvature radii, resulting in a circular cross-section from inlet to outlet. For a smooth transition, the center height is typically relatively high, which cannot meet the requirements of certain special applications, such as space-constrained basements or facilities with low ceilings. A lower pump center height is needed to better adapt to environmental requirements.
[0005] The above figure shows an existing DN150 diameter vertical pipeline pump body with an elbow-shaped inlet channel inlet radius R = 75mm, a center height L1 = 303mm, and a radial dimension H1 = 500mm from the elbow-shaped inlet channel inlet (i.e., the pump inlet) to the center of the pump body. Utility Model Content
[0006] To address the aforementioned problems, the main objective of this utility model is to provide a vertical pipeline pump body with an ultra-low center height inlet flow channel. Its elbow-shaped flow channel design combines a variable curvature radius and an annular suction chamber design method, changing the traditional arc shape to a gradually expanding flat transition, thereby reducing the center height of the vertical pipeline pump while ensuring uniform flow velocity.
[0007] This utility model solves the above-mentioned technical problems through the following technical solution: an ultra-low center height vertical pipeline pump body, wherein the water inlet channel of the ultra-low center height vertical pipeline pump body is located at the water inlet of the vertical pipeline pump body, the ultra-low center height vertical pipeline pump body includes: an elbow-shaped water inlet channel; the elbow-shaped water inlet channel includes an inlet section and an annular suction chamber, the inlet section and the annular suction chamber are integrally formed; the annular suction chamber is provided with a baffle and a circular vortex; the cross-sectional shape of the inlet section is a circular section that gradually transitions to a rectangular section; the shape and cross-sectional area of the front end and the rear end of the annular suction chamber are the same.
[0008] In a specific embodiment of this utility model, the cross-sectional area S of the circular inlet AA' of the inlet section is... A =πR 2 , where R is the radius of the circular section of AA'.
[0009] The rectangular cross-section BB' of the inlet section has a cross-sectional area S. B =ab, where a is the length of the BB' cross-sectional rectangle and b is the width of the BB' cross-sectional rectangle; a = Kb, K = 1.5~2.2; S B =δS A , δ=1.0~1.4.
[0010] In a specific embodiment of this utility model, the initial cross-section of the annular water absorption chamber is the BB' cross-section, and the fluid gradually flows to both sides starting from the BB' cross-section.
[0011] In a specific embodiment of this utility model, the thickness of the partition ranges from 5 to 15 mm.
[0012] The positive and progressive effects of this utility model are as follows: The ultra-low center height vertical pipeline pump body provided by this utility model has the following advantages: This utility model reduces the overall height of the pump, making the pump more compact and easier to integrate into existing piping systems, which is especially important for locations with limited space. This not only saves installation space and reduces the need for special foundations, but also lowers construction costs. At the same time, the reduced center height also helps improve the stability of the pump during operation, reduces vibration and noise, and extends the pump's service life. A lower center height means a shorter axial dimension, which helps balance the radial and axial loads generated during pump operation, reducing energy loss.
[0013] The circular vortex (also called "vortex" or "pre-swirl") in the annular suction chamber of this invention buffers the velocity differences of the water flow before it enters the impeller, creating a symmetrical velocity and pressure field within the annular space. This prevents uneven impeller stress (such as excessive radial force) caused by localized flow concentration, thereby reducing vibration and noise. Furthermore, the circular vortex forms a stable forced swirling flow within the suction chamber, ensuring the fluid has a circumferential velocity aligned with the impeller's rotation direction before entering the impeller, reducing impeller inlet impact losses. Attached Figure Description
[0014] Figure 1 A schematic diagram of an existing vertical pipeline pump structure.
[0015] Figure 2 A schematic diagram of the existing pump body structure.
[0016] Figure 3-1 A schematic diagram of the existing pump body elbow-shaped flow channel water structure.
[0017] Figure 3-2 for Figure 3-1 The left view.
[0018] Figure 4 This is a schematic diagram of the pump body proposed in this utility model.
[0019] Figure 5-1 This is a schematic diagram of the elbow-shaped flow channel water structure of the pump body proposed in this utility model.
[0020] Figure 5-2 This is a schematic diagram of the elbow-shaped flow channel water structure of the pump body proposed in this utility model.
[0021] Figure 6 This is a three-dimensional schematic diagram of the elbow-shaped water inlet channel proposed in this utility model.
[0022] The following are the names corresponding to the reference numerals in this utility model:
[0023] In the picture:
[0024] Elbow-shaped inlet channel 1, pump body 2, impeller 3, pump cover 4, motor 5, baffle plate 6, circular vortex 7. Detailed Implementation
[0025] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.
[0026] Figure 4 This is a schematic diagram of the pump body proposed in this utility model. Figure 5-1 This is a schematic diagram of the elbow-shaped flow channel water structure of the pump body proposed in this utility model. Figure 5-2 This is a schematic diagram of the elbow-shaped flow channel water structure of the pump body proposed in this utility model. Figure 6 This is a three-dimensional schematic diagram of the elbow-shaped water inlet channel proposed in this utility model. As shown in the figure above: This utility model proposes an ultra-low center height vertical pipeline pump body. The water inlet channel of this ultra-low center height vertical pipeline pump body is located at the water inlet of the vertical pipeline pump body. The ultra-low center height vertical pipeline pump body includes: an elbow-shaped water inlet channel 1, which includes an inlet section and an annular suction chamber. The inlet section and the annular suction chamber are integrally formed. The annular suction chamber is provided with a baffle 6 and a circular vortex 7. The cross-sectional shape of the inlet section is a circular section that gradually transitions to a rectangular section. The shape and cross-sectional area of the front end and the rear end of the annular suction chamber are the same.
[0027] The cross-sectional area S of the circular inlet AA' in the inlet section A =πR 2 Where R is the radius of the circular section AA'; and S is the cross-sectional area of the rectangular section BB' of the inlet section. B =ab, where a is the length of the BB' cross-sectional rectangle and b is the width of the BB' cross-sectional rectangle; a = Kb, K = 1.5~2.2, the larger the K value, the smaller the center height H, and the smaller the K value, the larger the center height H; during design, SB = δSA, δ = 1.0~1.4, to ensure the uniformity of flow velocity.
[0028] The initial cross-section of the annular suction chamber is the BB' section, and the fluid gradually flows to both sides from the BB' section.
[0029] The thickness of the baffle plate is 5-15mm depending on the pump size, with larger values for larger pumps and smaller values for smaller pumps. This utility model embodiment improves upon the aforementioned DN150 diameter vertical pipeline pump, now with the elbow-shaped flow channel having a water volume R = 75mm, a = 220mm, b = 105mm, i.e., a = 2.1b, S A =17671.5mm 2 S B =23100mm2, S B =1.31S A The improved radial dimension L2 was reduced from 500mm to 410mm, saving on manufacturing costs. The improved center height H2 is 183mm, a 39.6% reduction compared to the existing elbow-shaped flow channel center height H1, resulting in a significant reduction in the pump's center height. This means a smaller overall pump height, a more compact design, and easier integration into existing piping systems, which is especially important in space-constrained environments. This not only saves installation space and reduces the need for special foundations but also lowers construction costs. Simultaneously, the reduced center height helps improve pump stability during operation, reduces vibration and noise, and extends pump lifespan. A lower center height also means a shorter axial dimension, which helps balance the radial and axial loads generated during pump operation, reducing energy loss.
[0030] The baffle in this invention forces water to flow along a preset path by dividing the annular flow channel, thereby enhancing the uniformity of water distribution, shortening the residence time of water in the annular space, avoiding local stagnant water or low-speed zones, and reducing the risk of cavitation.
[0031] The circular vortex (also called "vortex" or "pre-swirl") in the annular suction chamber of this invention buffers the velocity differences of the water flow before it enters the impeller, creating a symmetrical velocity and pressure field within the annular space. This prevents uneven impeller stress (such as excessive radial force) caused by localized flow concentration, thereby reducing vibration and noise. Furthermore, the circular vortex forms a stable forced swirling flow within the suction chamber, ensuring that the fluid has a circumferential velocity aligned with the impeller's rotation direction before entering the impeller, reducing impeller inlet impact losses.
[0032] In summary, the improvements of this utility model reduce the overall height of the vertical pipeline pump, significantly affecting the pump's installation and operation characteristics, including improving its installation stability, reducing its floor space, adapting to special installation requirements, and improving maintenance convenience.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.
Claims
1. A vertical pipeline pump body with ultra-low center height, characterized in that: The water inlet channel of the ultra-low center height vertical pipeline pump body is located at the water inlet of the vertical pipeline pump body. The ultra-low center height vertical pipeline pump body includes: an elbow-shaped water inlet channel; the elbow-shaped water inlet channel includes an inlet section and an annular suction chamber, which are integrally formed; the annular suction chamber is provided with a baffle and a circular vortex; the cross-sectional shape of the inlet section is a circular section that gradually transitions to a rectangular section; the shape and cross-sectional area of the front end and the rear end of the annular suction chamber are the same.
2. The pump body of the ultra-low center height vertical pipeline pump according to claim 1, characterized in that: The cross-sectional area S of the circular inlet AA' in the inlet section A =πR 2 , where R is the radius of the circular section of AA'; The rectangular cross-section BB' of the inlet section has a cross-sectional area S. B =ab, where a is the length of the BB' cross-sectional rectangle and b is the width of the BB' cross-sectional rectangle; a = Kb, K = 1.5~2.2; S B =δS A , δ=1.0~1.
4.
3. The pump body of the ultra-low center height vertical pipeline pump according to claim 1, characterized in that: The initial cross-section of the annular suction chamber is the BB' section, and the fluid gradually flows to both sides from the BB' section.
4. The pump body of the ultra-low center height vertical pipeline pump according to claim 1, characterized in that: The thickness of the partition is 5-15mm.