A pump inlet reinforcement structure with a guide cone

Abstract

This utility model discloses a pump inlet reinforcement structure with a guide cone, including a pump inlet pipe, a baffle fixed inside the end of the pump inlet pipe, and the edge of the baffle vertically surrounding and fixed to the inner side wall of the pump inlet pipe; a guide cone is covered on the opening at the end of the pump inlet pipe, and the bottom edge of the guide cone is fixedly connected to the edge of the opening at the end of the pump inlet pipe; through holes parallel to the pump inlet pipe are densely and evenly opened on the baffle; several water inlets are evenly opened through the inclined surface of the guide cone, and a reinforcing column is connected between the top of the guide cone and the top of the baffle. This utility model achieves progressive acceleration and diversion of fluid through the coordinated design of the inclined surface of the guide cone and the water inlets. The stainless steel shell further reduces the surface friction resistance, so that the medium completes the flow velocity homogenization before entering the pump cavity. Compared with the traditional straight pipe structure, this design can effectively reduce the intensity of inlet turbulence and effectively eliminate the periodic impact on the impeller working surface.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pumps, specifically a pump inlet reinforcement structure with a guide cone. Background Technology

[0002] In the field of centrifugal pump fluid transport, the inlet structure design directly affects equipment efficiency and service life. Traditional centrifugal pumps generally adopt a straight pipe inlet structure. When transporting media containing solid particles or with turbulence, the lack of a flow guide structure in the inlet causes the fluid to enter the pump cavity at a non-uniform flow velocity, forming local eddies and radial impact forces. This irregular water flow generates periodic impacts on the impeller working surface. Especially when transporting high-viscosity fluids, material fatigue spalling occurs in the leading edge area of ​​the blades, significantly reducing the design life of high-speed alloy impellers. Furthermore, turbulent flow entering the pump body disrupts the laminar flow state, forcing the impeller to consume additional kinetic energy for flow reorganization. Experiments show that inlet turbulence can reduce the actual working efficiency of the impeller. More seriously, this energy loss is converted into fluid heat, accelerating the aging process of mechanical seals.

[0003] Current solutions mostly focus on remedial measures, such as thickening the impeller wall or using surface coatings. These methods increase manufacturing costs and fail to eliminate the root cause of energy loss. Therefore, developing a completely new centrifugal pump inlet structure has become a key breakthrough direction for improving the overall performance of centrifugal pumps. Utility Model Content

[0004] The purpose of this invention is to provide a pump inlet reinforcement structure with a guide cone to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A pump inlet reinforcement structure with a guide cone includes a pump inlet pipe, a baffle fixed inside the end of the pump inlet pipe, and the edge of the baffle vertically surrounding and fixed to the inner sidewall of the pump inlet pipe; a guide cone is provided over the opening at the end of the pump inlet pipe, and the bottom edge of the guide cone is fixedly connected to the edge of the opening at the end of the pump inlet pipe; through holes parallel to the pump inlet pipe are densely and evenly opened on the baffle; a plurality of water inlets are evenly opened through the inclined surface of the guide cone; and a reinforcing column is connected between the top of the guide cone and the top of the baffle.

[0007] In a further embodiment, a stainless steel shell is attached to the inclined surface of the guide cone.

[0008] Preferably, the inclination angle of the guide cone is 30-45 degrees.

[0009] Preferably, the number of water inlets is 10-14.

[0010] Preferably, the diameter of the through hole is 1-3 mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] I. This utility model achieves progressive acceleration and diversion of fluid through the coordinated design of the inclined surface of the guide cone and the inlet. The stainless steel shell further reduces surface friction resistance, so that the medium completes the flow velocity homogenization before entering the pump chamber. Compared with the traditional straight pipe structure, this design can effectively reduce the intensity of inlet turbulence and effectively eliminate the periodic impact on the impeller working surface.

[0013] Second, the Venturi effect formed by the guide cone of this utility model increases the local flow velocity, and the baffle through-hole array generates a controllable pressure drop. The two work together to reconstruct the laminar boundary layer. This structure increases the effective power of the impeller and reduces the vibration amplitude of the pump body. In addition, the corrosion resistance of the stainless steel shell expands the applicable scenarios of the equipment in chemical media.

[0014] Third, the through holes on the baffle plate of this utility model constitute a primary filtration layer. Combined with the centrifugal separation effect of the guide cone, solid particles slide and settle along the cone surface under inertia. The reinforcing column ensures structural stability, while its cylindrical surface guides particles towards the pipe wall. Actual measurements show that this structure achieves a 92% interception rate for impurities with a diameter >2mm, directly reducing impeller wear and extending the life of mechanical seals. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] In the diagram: 1. Pump inlet pipe; 2. Baffle; 3. Guide cone; 4. Through hole; 5. Water inlet; 6. Reinforcing column; 7. Stainless steel shell. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Implementation, for example Figure 1As shown, this embodiment provides a pump inlet reinforcement structure with a guide cone, including a pump inlet pipe 1, a baffle 2 fixed inside the end of the pump inlet pipe 1, and the edge of the baffle 2 vertically surrounding and fixed to the inner side wall of the pump inlet pipe 1; a guide cone 3 is provided on the opening at the end of the pump inlet pipe 1, and a stainless steel shell 7 is attached to the inclined surface of the guide cone 3, with an inclination angle of 30-45 degrees. The bottom edge of the guide cone 3 is fixedly connected to the edge of the opening at the end of the pump inlet pipe 1; the baffle 2 has densely and evenly distributed through holes 4 with a diameter of 1-3 mm parallel to the pump inlet pipe 1; 10-14 water inlets 5 are evenly distributed through the inclined surface of the guide cone 3; and a reinforcing column 6 is connected between the top of the guide cone 3 and the top of the baffle 2.

[0019] During operation, water flows into the pump inlet pipe 1 through the inlet 5. The conical slope of the guide cone 3 significantly reduces the initial impact force of the water flow. Subsequently, the water flows through the densely packed through holes 4 on the baffle 2 into the pump body. After passing through the densely packed through holes 4, the water flow velocity is uniform and the impact force is further reduced, effectively reducing the intensity of the inlet turbulence and effectively eliminating the periodic impact on the impeller working surface. The reinforcing column 6 strengthens the structural connection between the guide cone 3 and the baffle 2, while effectively improving their impact resistance.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pump inlet enhancement structure with a flow cone, characterized by: Includes a pump inlet pipe (1), with a baffle (2) fixed inside the end of the pump inlet pipe (1), the edge of the baffle (2) being vertically fixed around the inner wall of the pump inlet pipe (1); a guide cone (3) is provided on the opening at the end of the pump inlet pipe (1), the bottom edge of the guide cone (3) being fixedly connected to the edge of the opening at the end of the pump inlet pipe (1); Among them, the baffle (2) is provided with through holes (4) that are parallel to the pump inlet pipe (1) in a dense and uniform manner. Among them, a number of water inlets (5) are evenly opened through the inclined surface of the guide cone (3), and a reinforcing column (6) is connected between the top of the guide cone (3) and the top of the baffle (2).

2. A pump inlet enhancement structure with a flow cone according to claim 1, characterized in that: The guide cone (3) has a stainless steel shell (7) attached to its inclined surface.

3. A pump inlet enhancement structure with a flow cone according to claim 1, characterized in that: The angle of inclination of the inclined surface of the guide cone (3) is 30-45 degrees.

4. The pump inlet enhancement structure with a flow cone of claim 1, wherein: The number of water inlets (5) is 10-14.

5. The pump inlet enhancement structure with a flow cone of claim 1, wherein: The diameter of the through hole (4) is 1-3 mm.

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