A centrifugal pump ring cover structure

Abstract

The utility model discloses a centrifugal pump mouth ring cover structure relates to the field of centrifugal pump, including the body, the flange face is formed to the body's lateral wall lower extreme and extends outward along the circumferential direction, and is equipped with a plurality of openings at the junction of lateral wall and flange face, and each opening is distributed along the circumferential direction of lateral wall, and each opening keeps closed to the edge of flange face. The utility model discloses the mouth ring cover does not exist the gap on the flange face, makes the mouth ring cover relative mouth ring seat's tight degree more uniform, thereby significantly improves the stability of mouth ring cover, and the drawing force can be achieved above 600N after assembly. The design that the opening is closed at the flange face edge simplifies the assembly process, reduces the operation difficulty, reduces the quality hidden danger caused by improper assembly simultaneously, and the optimization of opening position and shape further enhances the adaptability of structure, so that the scheme can better satisfy the use demand under different working conditions, and provides strong support for the overall performance improvement of the stamping welding centrifugal pump.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pumps, and specifically to a centrifugal pump inlet ring cover structure. Background Technology

[0002] The commonly used inlet ring cover structure for stamped and welded centrifugal pumps in the industry is as follows: Figure 1 As shown, the mouth ring cap (1') has a certain negative angle (i.e., it is turned inward), which makes it easy to be locked on the mouth ring seat (3') and play the role of restricting the mouth ring (2'). Figure 2 This is an assembly diagram of the mouth ring cap. Both the mouth ring cap and the mouth ring seat have an inward-facing angle to ensure the mouth ring fits snugly against the flow guide housing (4') during assembly and prevents it from detaching. The assembly sequence is as follows: the mouth ring seat is spot-welded to the flow guide housing, then the mouth ring is placed in, and finally the mouth ring cap is press-fitted onto the mouth ring seat. However, because the existing mouth ring cap has a completely through opening, the opening after assembly is relatively large, and the pull-out force it can withstand is only about 300N, making it prone to detachment. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a centrifugal pump inlet ring cover structure that solves the problems of easy detachment and extremely unstable pull-out force of the existing inlet ring cover structure.

[0004] The purpose of this utility model is achieved through the following technical solution: a centrifugal pump port ring cover structure, including a body, wherein the lower end of the side wall of the body extends outward along the circumferential direction to form a flange surface, and a plurality of openings are provided at the connection between the side wall and the flange surface, wherein each opening is evenly distributed along the circumferential direction of the side wall, and each opening remains closed relative to the edge of the flange surface.

[0005] As a further technical solution, the opening has an extension on the flange face, and the extension is also closed relative to the edge of the flange face.

[0006] As a further technical solution, the opening can be circular or trapezoidal in shape.

[0007] As a further technical solution, the body is press-fitted onto the mouth ring seat to limit the mouth ring. The mouth ring seat is welded and fixed onto the flow guide housing, and the mouth ring is placed inside the mouth ring seat on the flow guide housing.

[0008] As a further technical solution, the pull-out force that the body can withstand after being assembled with the mouth ring seat is ≥600N.

[0009] The beneficial effects of this utility model are as follows: 1. Compared with the prior art, the mouth ring cover of this utility model has no gap on the flange surface (the original opening and closing), which makes the clamping force of the mouth ring cover relative to the mouth ring seat more uniform, thereby significantly improving the stability of the mouth ring cover. The pull-out force after assembly can reach more than 600N. 2. The design of the opening closing at the edge of the flange face simplifies the assembly process, reduces the difficulty of operation, and reduces potential quality problems caused by improper assembly. 3. The optimization of the opening position and shape further enhances the adaptability of the structure, enabling the solution to better meet the usage requirements under different working conditions and providing strong support for the overall performance improvement of the stamped and welded centrifugal pump. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the mouth ring cap in the prior art.

[0011] Figure 2 This is a schematic diagram of the assembly structure of the mouth ring cover in the prior art.

[0012] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of this utility model.

[0013] Figure 4 This is a top view of Embodiment 1 of the present invention.

[0014] Figure 5 for Figure 4 AA sectional view.

[0015] Figure 6 This is a three-dimensional structural diagram of Embodiment 2 of this utility model.

[0016] Figure 7 This is a top view of Embodiment 2 of the present invention.

[0017] Figure 8 for Figure 7 BB cross-sectional view.

[0018] Explanation of reference numerals in the attached drawings: 1' mouth ring cap, 2' mouth ring, 3' mouth ring seat, 4' flow guide shell; Body 1, side wall 2, flange face 3, edge 31, opening 4, extension 41. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings: Example 1: As shown in the attached document Figures 3-5 As shown, a centrifugal pump inlet ring cover structure includes a body 1, a side wall 2, a flange face 3, an edge 31, and an opening 4.

[0020] Reference Appendix Figure 3The ring cap has a body 1. The lower end of the side wall 2 of the body 1 extends outward along the circumferential direction to form a flange surface 3. Three openings 4 (three in this embodiment, but other numbers are also possible) are provided at the connection between the side wall 2 and the flange surface 3. Each opening 4 is evenly distributed along the circumferential direction of the side wall 2, and each opening 4 remains closed relative to the edge 31 of the flange surface 3 (e.g., Figure 4 , 5 (As shown). Compared with the prior art, the opening 4 in this embodiment adopts a non-fully through design, so that there is no gap on the flange surface 3, which can effectively suppress the opening after the mouth ring cover is assembled, and is more difficult to fall off than the previous structure.

[0021] Preferably, the pull-out force that the body 1 can withstand after being assembled with the mouth ring seat is ≥600N. After the mouth ring cover is pressed onto the mouth ring seat, the required pull-out force is even greater, and it is less likely to loosen.

[0022] Preferably, the shape of the opening 4 can be circular or trapezoidal, which can be flexibly adjusted according to the actual working conditions, making it more adaptable.

[0023] During assembly, the main body 1 is pressed onto the mouth ring seat to limit the mouth ring. At the same time, the mouth ring seat is welded and fixed to the flow guide shell, and the mouth ring is placed in the mouth ring seat on the flow guide shell.

[0024] Example 2: Figures 6-8 As shown, the difference from Embodiment 1 is that the opening 4 has an extension section 41 on the flange face 3 (thus presenting an L-shaped structure in cross section), and the extension section 41 is also closed relative to the edge 31 of the flange face 3. That is, the extension section 41 and the edge 31 still adopt a non-complete through design to ensure that the mouth ring cover and the mouth ring seat can be tightly fitted after installation.

[0025] This invention, by pressing the mouth ring cap onto the mouth ring seat, requires a greater pulling force and is less prone to loosening. Existing technologies require a pulling force of around 300N, while the new structure provided by this invention can achieve a pulling force of over 600N, doubling the original value. This effectively prevents detachment due to vibration or external forces, making it more reliable in practical applications.

[0026] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. A centrifugal pump inlet ring cover structure, characterized in that: Includes a body (1), the lower end of the side wall (2) of the body (1) extends outward along the circumferential direction to form a flange surface (3), and a number of openings (4) are provided at the connection between the side wall (2) and the flange surface (3). Each opening (4) is evenly distributed along the circumferential direction of the side wall (2), and each opening (4) remains closed relative to the edge (31) of the flange surface (3).

2. The centrifugal pump inlet ring cover structure according to claim 1, characterized in that: The opening (4) has an extension (41) on the flange face (3), and the extension (41) is also closed relative to the edge (31) of the flange face (3).

3. The centrifugal pump inlet ring cover structure according to claim 1, characterized in that: The opening (4) is circular or trapezoidal in shape.

4. The centrifugal pump inlet ring cover structure according to any one of claims 1 to 3, characterized in that: The main body (1) is press-fitted onto the mouth ring seat to limit the mouth ring. The mouth ring seat is welded and fixed onto the flow guide housing. The mouth ring is placed inside the mouth ring seat on the flow guide housing.

5. The centrifugal pump inlet ring cover structure according to claim 4, characterized in that: The pull-out force that the body (1) can withstand after being assembled with the mouth ring seat is ≥600N.

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