Fire-fighting water pump device

Abstract

This utility model belongs to the field of fire-fighting equipment technology, and particularly relates to a fire-fighting water pump device, including a rotating base and a blade. The rotating base is rotatably connected to the center of the water pump. The blade includes a reinforcing part and a body. One end of the body is fixedly connected to the rotating base. The reinforcing part is disposed on the edge of the body near the water inlet of the water pump. The reinforcing part is laid along the length of the blade edge, and its thickness is greater than that of the body. Multiple sets of spaced-apart first guide grooves are distributed on the reinforcing part. This provides directional reinforcement of the blade's leading edge impact area. The reinforcing part directly resists the water flow impact load, significantly suppressing local deformation and crack initiation. Simultaneously, the guide grooves guide the water flow to form stable micro-vortices, effectively reducing flow field separation and turbulence losses caused by traditional integral reinforcement structures. Thus, while improving the structural durability of the blade's inlet side, hydraulic efficiency is simultaneously optimized.

Description

Technical Field

[0001] This utility model belongs to the field of fire protection equipment technology, and in particular relates to a water pump device for fire protection. Background Technology

[0002] As the core power equipment of fire protection systems, fire pumps typically employ a centrifugal impeller design, consisting of a disc, blades, and hub forming an integral cast or welded assembly. In existing technologies, blade geometry primarily focuses on improving hydraulic efficiency and cavitation resistance, such as by optimizing blade profiles, adjusting inlet angles, or adding surface coatings to enhance hydrodynamic performance. To strengthen the overall impeller rigidity, some designs utilize a split structure (such as detachable blades joined to the disc) or external reinforcing rings (such as metal reinforcing rings connecting the blade outer edges) to cope with centrifugal stress and vibration loads under high-speed rotation. Furthermore, bronze or stainless steel is frequently chosen as materials to improve corrosion resistance and foundation strength.

[0003] While existing designs have made progress in overall structural reinforcement and efficiency optimization, significant shortcomings remain: the blade inlet end, directly bearing the impact load of water flow, becomes a high-risk area for stress concentration and fatigue damage. Traditional impellers generally lack unilateral directional reinforcement designs for the inlet side, relying solely on uniform thickening or integral reinforcing rings, resulting in insufficient local impact resistance at the blade leading edge. During long-term operation, water flow impact and solid particle erosion can easily cause plastic deformation, microcrack propagation, and even fracture at the blade inlet edge, thereby reducing head stability and system reliability. Furthermore, while integral reinforcement schemes (such as outer edge connecting rings) improve overall stiffness, they exacerbate hydraulic losses and efficiency degradation by increasing flow channel resistance and disrupting the water boundary layer. This deficiency is particularly prominent under the harsh operating conditions of high head and rapid start-stop of fire pumps, urgently requiring solutions through innovative structural design. Utility Model Content

[0004] The purpose of this utility model is to provide a fire pump device, which aims to solve the technical problem that the conventional design of the blades in existing fire pumps can easily cause plastic deformation, micro-crack propagation, or even breakage of the blade inlet edge due to water flow impact and solid particle scouring, resulting in reduced head stability and system reliability.

[0005] To achieve the above objectives, this utility model provides a fire-fighting water pump device, including a rotating base and a blade. The rotating base is rotatably connected to the center of the water pump. The blade includes a reinforcing part and a body. One end of the body is fixedly connected to the rotating base. The reinforcing part is disposed on the edge of the body near the water flow input position of the water pump. The reinforcing part is laid along the length of the edge of the blade, and the thickness of the reinforcing part is greater than that of the body. Multiple sets of spaced first guide grooves are distributed on the reinforcing part.

[0006] Optionally, the reinforcing part includes a covering layer and an inner layer. The covering layer is integrally formed with the edge of the body. An installation cavity is provided in the covering layer. The inner layer is disposed in the installation cavity. The first flow channel is formed on the side wall of the covering layer. The bottom wall of the first flow channel is flush with the end face of the body.

[0007] Optionally, the inner layer is arranged in a strip-shaped structure and is cast from hard metal steel.

[0008] Optionally, the main body is provided with multiple sets of second guide channels, and all the second guide channels are respectively aligned with the corresponding first guide channels, so that the water flow output from the first guide channel can smoothly enter the second guide channel.

[0009] Optionally, the output end of the second guide channel is bent and extends to the side wall of the body, and the output end of the second guide channel passes through the side wall edge of the body to the outside of the body.

[0010] Optionally, the input end of the first guide channel extends from the top of the covering layer to the outside of the covering layer, so that the water flow entering from the water pump input end can smoothly enter the first guide channel from the input end of the first guide channel.

[0011] Optionally, a confluence groove is provided near the output end of the second guide groove on the main body. The confluence groove is arranged along the length direction of the main body, and the output end of the confluence groove passes through the side wall edge of the main body away from the rotating seat. The confluence groove is connected to the output ends of all the second guide grooves, and all the second guide grooves are evenly spaced along the length direction of the confluence groove.

[0012] Optionally, the fire pump further includes a fixing ring, wherein there are two sets of fixing rings, the two sets of fixing rings are concentrically arranged with the rotating seat, the inner ring of the fixing ring is fixedly connected to the side wall of the body away from the rotating seat, the reinforcing part is fixedly connected to the end face of the fixing ring, and the two sets of fixing rings are respectively connected to the upper end and the lower end of the body.

[0013] Optionally, the fire pump also includes a mounting base, the shape of which is adapted to the fixed ring, the mounting base having a mounting cavity, the rotating seat being rotatably connected to the center of the mounting cavity, and the mounting base being rotatably connected to the inner wall of the mounting cavity.

[0014] Optionally, an output port is provided on the side wall of the mounting cavity, and the width of the output port is greater than the distance between the two sets of fixing rings.

[0015] The above-mentioned technical solutions of one or more of the fire pump devices provided in this utility model embodiment have at least one of the following technical effects: by setting a reinforcing part with a thickness greater than the body at the water inlet end edge of the blade fan, and opening multiple sets of guide grooves at intervals along the length direction, the impact area of ​​the blade leading edge is directionally strengthened. The reinforcing part directly resists the water flow impact load, significantly suppressing local deformation and crack initiation. At the same time, the guide grooves guide the water flow to form a stable micro vortex, effectively weakening the flow field separation and turbulence loss caused by the traditional overall reinforcement structure, thereby simultaneously optimizing hydraulic efficiency while improving the durability of the blade water inlet side structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a fire-fighting water pump device provided in an embodiment of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the impeller and retaining ring of a fire-fighting water pump device.

[0019] Figure 3 for Figure 2 An enlarged view of A in the image.

[0020] Figure 4 A side view of the blade and fixing ring provided in an embodiment of this utility model.

[0021] Figure 5 A schematic diagram of the blade fan provided in an embodiment of this utility model.

[0022] The following are the labeling elements in the figure:

[0023] 100—Rotating seat; 200—Blade; 210—Reinforcing section

[0024] 220—Main Body 211—Covering Layer 212—Inner Layer

[0025] 300—First guide channel; 400—Second guide channel; 500—Confluence channel

[0026] 600—Fixing ring; 700—Mounting base; 710—Mounting cavity

[0027] 720—Output port. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-5 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0032] In one embodiment of this utility model, such as Figures 1-5 As shown, a fire-fighting water pump device is provided, including a rotating base 100 and a blade 200. The rotating base 100 is rotatably connected to the center position of the water pump. The blade 200 includes a reinforcing part 210 and a body 220. One end of the body 220 is fixedly connected to the rotating base 100. The reinforcing part 210 is disposed on the edge of the body 220 near the water flow input position of the water pump. The reinforcing part 210 is laid along the length direction of the edge of the blade 200. The thickness of the reinforcing part 210 is greater than that of the body 220. Multiple sets of spaced first guide grooves 300 are distributed on the reinforcing part 210.

[0033] By setting a reinforcing part 210 with a thickness greater than the body 220 at the water inlet edge of the blade fan 200 and opening multiple sets of guide grooves at intervals along the length direction, this scheme achieves directional reinforcement of the blade leading edge impact area: the reinforcing part 210 directly resists the water flow impact load, significantly suppressing local deformation and crack initiation, while the guide grooves guide the water flow to form a stable micro vortex, effectively weakening the flow field separation and turbulence loss caused by the traditional integral reinforcement structure, thereby simultaneously optimizing hydraulic efficiency while improving the durability of the blade water inlet side structure.

[0034] like Figures 1-5 As shown, in another embodiment of this utility model, the reinforcing part 210 includes a covering layer 211 and an embedded layer 212. The covering layer 211 is integrally formed with the edge of the body 220. The covering layer 211 has an installation cavity, and the embedded layer 212 is disposed in the installation cavity. The first flow guide groove 300 is formed on the side wall of the covering layer 211, and the bottom wall of the first flow guide groove 300 is flush with the end face of the body 220. The covering layer 211 and the blade body 220 are integrally formed to form a protective shell. The embedded layer 212 is embedded in the cavity of the covering layer 211 to reinforce the core area. The flow guide groove is etched on the surface of the covering layer 211 and smoothly connected to the blade body 220. The composite layer structure achieves layered dissipation of impact force. The embedded layer 212 resists high-intensity impact loads, and the covering layer 211 maintains the streamlined shape and carries the flow guide function. This solves the flow channel blockage problem caused by traditional integral thickening and avoids the defect of insufficient impact resistance of a single material.

[0035] In another embodiment of this invention, the inner layer 212 is arranged in a strip-like structure and is cast from hard metal steel. The hard metal inner layer 212 is precisely embedded in the leading edge region of the blade in a long strip shape. The high-hardness metal strip specifically reinforces the weakest area at the water inlet, significantly suppressing plastic deformation caused by water flow impact, while avoiding the inertial load problem caused by the excessive mass of traditional integral metal impellers.

[0036] like Figures 1-5 As shown, in another embodiment of this utility model, the main body 220 is provided with multiple sets of second guide channels 400. All the second guide channels 400 are aligned one-to-one with the corresponding first guide channels 300, so that the water flow output from the first guide channels 300 can smoothly enter the second guide channels 400. The outlet of the first guide channel 300 is precisely connected to the second guide channel 400 on the surface of the blade body 220, forming a continuous guide path. The dual-stage guide channels work together to guide the water flow along the blade surface in an orderly manner, eliminating the disordered turbulence generated after the water flow impacts the leading edge of the traditional impeller, and significantly reducing hydraulic loss and vibration noise.

[0037] like Figures 1-5As shown, in another embodiment of this utility model, the output end of the second guide channel 400 is bent and extends to the side wall of the body 220, and the output end of the second guide channel 400 passes through the side wall edge of the body 220 to the outside of the body 220. The end of the second guide channel 400 bends towards the side of the blade and extends to the outer edge of the blade. The bent outlet guides the water flow to the tangential direction of the impeller rotation, reducing the loss of radial velocity components and overcoming the problem of reduced energy conversion efficiency caused by the turbulence of the streamline at the outlet of traditional blades.

[0038] like Figures 1-5 As shown, in another embodiment of this utility model, the input end of the first guide channel 300 extends from the top of the coating layer 211 to the outside of the coating layer 211, allowing water flowing from the pump input end to smoothly enter the first guide channel 300 from its input end. The inlet of the first guide channel 300 penetrates the top of the coating layer 211 and directly faces the water inlet direction. This ensures that high-speed water flow preferentially enters the guide channel rather than directly impacting the blade body, dispersing the impact pressure from the source and solving the problem of localized erosion failure at the leading edge of traditional blades.

[0039] like Figures 1-5 As shown, in another embodiment of this utility model, a converging groove 500 is provided on the body 220 near the output end of the second guide groove 400. The converging groove 500 is arranged along the length direction of the body 220, and the output end of the converging groove 500 penetrates the side wall edge of the body 220 away from the rotating seat 100. The converging groove 500 is connected to the output ends of all the second guide grooves 400, and all the second guide grooves 400 are evenly spaced along the length direction of the converging groove 500. The converging groove 500 integrates the outflows of each second guide groove 400, and after converging along the blade length direction, it is uniformly discharged from the outer edge of the blade. The converging design eliminates the eddies caused by the mutual interference of multiple streams, improves the orderliness and kinetic energy consistency of the water flow when leaving the impeller, and breaks through the head fluctuation bottleneck caused by traditional decentralized outflow.

[0040] like Figures 1-5 As shown, in another embodiment of this utility model, the fire pump further includes two sets of fixing rings 600. The two sets of fixing rings 600 are concentrically arranged with the rotating seat 100. The inner ring of each fixing ring 600 is fixedly connected to the side wall of the body 220 away from the rotating seat 100. The reinforcing part 210 is fixedly connected to the end face of the fixing ring 600. The two sets of fixing rings 600 are respectively connected to the upper and lower ends of the body 220. The double fixing rings 600 clamp the outer edge of the blade and are rigidly connected to the reinforcing part 210. The annular frame structure improves the overall bending stiffness of the impeller, suppresses blade flutter deformation under high-speed rotation, and avoids the problem of traditional external connecting rings blocking the axial flow channel.

[0041] like Figures 1-5 As shown, in another embodiment of this utility model, the fire pump further includes a mounting base 700, the mounting base 700 being adapted to the shape of the fixing ring 600. The mounting base 700 has a mounting cavity 710, and the rotating seat 100 is rotatably connected to the center of the mounting cavity 710. The mounting base 700 is rotatably connected to the inner wall of the mounting cavity 710. The mounting base 700 encloses the fixing ring 600 and the rotating seat 100 through a cavity, forming a double rotational support. The distributed support structure reduces the concentrated load on the bearings and solves the problem of uneven wear failure that easily occurs in traditional single-point supports under rapid start-stop conditions.

[0042] like Figures 1-5 As shown, in another embodiment of this utility model, an output port 720 is provided on the side wall of the mounting cavity 710. The width of the output port 720 is greater than the distance between the two sets of fixing rings 600. The width of the output port 720 covers the spacing range of the two fixing rings 600. The wide flow channel design ensures that the water flow after confluence is discharged without obstruction, eliminating the throttling loss and cavitation risk caused by traditional narrow outlets.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water pump device for fire fighting, characterized by comprising: include: A rotating base, which is rotatably connected to the center position of the water pump; The blade fan includes a reinforcing part and a body. One end of the body is fixedly connected to the rotating seat. The reinforcing part is disposed on the edge of the body near the water pump water inlet position. The reinforcing part is laid along the length of the edge of the blade, the thickness of the reinforcing part is greater than that of the body, and multiple sets of spaced first guide grooves are distributed on the reinforcing part.

2. The fire-fighting water pump apparatus according to claim 1, characterized by: The reinforcing part includes a covering layer and an inner layer. The covering layer is integrally formed with the edge of the body. An installation cavity is provided in the covering layer. The inner layer is disposed in the installation cavity. The first flow channel is formed on the side wall of the covering layer. The bottom wall of the first flow channel is flush with the end face of the body.

3. The water pump apparatus for fire fighting according to claim 2, characterized by: The inner layer is arranged in a strip-shaped structure and is cast from hard metal steel.

4. The water pump apparatus for fire fighting according to claim 2, characterized by: The main body is provided with multiple sets of second guide channels, and all the second guide channels are aligned with the corresponding first guide channels, so that the water flow output from the first guide channel can smoothly enter the second guide channel.

5. The fire-fighting water pump device according to claim 4, characterized in that: The output end of the second guide channel is bent and extends to the side wall of the body, and the output end of the second guide channel passes through the side wall edge of the body to the outside of the body.

6. The fire-fighting water pump apparatus according to claim 1, characterized by: The input end of the first guide channel extends from the top of the covering layer to the outside of the covering layer, allowing water flowing in from the water pump input end to smoothly enter the first guide channel from the input end of the first guide channel.

7. The fire-fighting water pump apparatus according to claim 4 or 5, characterized by: A confluence groove is provided on the main body near the output end of the second guide groove. The confluence groove is arranged along the length direction of the main body, and the output end of the confluence groove passes through the side wall edge of the main body away from the rotating seat. The confluence groove is connected to the output ends of all the second guide grooves, and all the second guide grooves are evenly spaced along the length direction of the confluence groove.

8. The fire-fighting water pump apparatus according to claim 1, characterized by: The fire pump also includes a fixing ring, and there are two sets of fixing rings. The two sets of fixing rings are concentrically arranged with the rotating seat. The inner ring of the fixing ring is fixedly connected to the side wall of the body away from the rotating seat. The reinforcing part is fixedly connected to the end face of the fixing ring. The two sets of fixing rings are respectively connected to the upper end and the lower end of the body.

9. The water pump apparatus for fire fighting according to claim 8, characterized by: The fire pump also includes a mounting base, which is adapted to the shape of the fixing ring. The mounting base is provided with a mounting cavity. The rotating seat is rotatably connected to the center position of the mounting cavity, and the mounting base is rotatably connected to the inner wall of the mounting cavity.

10. The fire-fighting water pump apparatus according to claim 9, characterized by: An output port is provided on the side wall of the mounting cavity, and the width of the output port is greater than the distance between the two sets of fixing rings.

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