Anti-overheat self-cooling water pump suitable for shallow water operation

Abstract

The application belongs to the technical field of water pumps, and discloses a self-cooling water pump for preventing overheating and suitable for shallow water operation, which comprises a pump body, a driving motor arranged in the pump body, a layered water inlet and a multi-stage filtering water inlet assembly arranged at the water inlet end, and a self-cooling circulating heat dissipation assembly arranged in the pump body, wherein the layered water inlet is arranged in a multi-height gradient mode and covers a water level interval of 1 cm to 20 cm to ensure continuous water inflow at different water levels and avoid idling, the self-cooling circulating heat dissipation assembly is linked with a motor transmission shaft, and the heat dissipation medium is circulated by using the power of the water pump itself to realize active heat dissipation; the multi-stage filtering water inlet assembly adopts a three-layer nested filtering structure to intercept impurities of different particle sizes in stages, and a detachable impurity collection bin is arranged at the bottom of the multi-stage filtering water inlet assembly. The self-cooling water pump for preventing overheating and suitable for shallow water operation has three core technologies, i.e., layered water inflow, self-cooling heat dissipation and multi-stage filtering, and can comprehensively improve the operation reliability and service life of the water pump under the condition of shallow water operation, and is suitable for various shallow water operation scenes such as building construction, municipal drainage and farmland drainage.

Description

Technical Field

[0001] This invention relates to the field of technology, and more specifically, to an overheat-resistant self-cooling water pump suitable for shallow water operations. Background Technology

[0002] In fields such as building construction, municipal drainage, farmland drainage, and site waterlogging cleanup, shallow low-water level drainage is an extremely common basic construction procedure. Scenarios such as shallow water accumulation in building foundation pits, surface water accumulation in construction sites, and shallow low-lying water accumulation after rain are generally characterized by shallow water levels, high levels of impurities in the water, and large fluctuations in water levels. Submersible pumps are the core drainage equipment in such scenarios, and their operational stability directly affects the construction progress and construction safety.

[0003] Currently, most submersible pumps and drainage pumps on the market are designed for conventional deep-water operations. Their core structure is adapted to operating environments with ample water intake and full liquid cooling. The water inlet is mostly located at the bottom of the pump body, and heat dissipation relies entirely on the external water surrounding the pump and the continuous flow of water carrying away operating heat. Under normal deep-water conditions, the pump is completely submerged in water with sufficient intake flow. The pump body, motor, and casing can achieve efficient heat dissipation through continuous water flow, allowing the equipment to operate stably for extended periods.

[0004] However, in shallow water operations, the working environment changes fundamentally: First, the water level is limited, failing to completely submerge the pump body, leaving most of its heat dissipation areas exposed to the air, thus losing the core water-cooling conditions. Second, the small volume and poor flow of water in shallow areas make it easy for the pump to experience insufficient water supply or flow rate after continuous pumping, leading to rapid emptying of the pump chamber and resulting in a dry or low-water idling state. During high-speed idling, the pump motor and impeller continuously generate a large amount of heat. Air cooling efficiency is extremely low, causing heat to accumulate rapidly and fail to dissipate. This can quickly lead to high-temperature aging of the motor windings, carbonization and failure of seals, and overheating and wear of bearings, and in severe cases, directly burn out the motor, rendering the equipment unusable.

[0005] Meanwhile, shallow water at construction sites and outdoor areas contains a large amount of impurities such as mud, gravel, construction debris, and plastic flocculents. Existing water pumps are only equipped with simple screens or no filtration structure, which cannot effectively intercept these impurities. These impurities are easily sucked into the pump body with the water flow, causing impeller jamming, pump chamber blockage, and pipeline siltation. This not only further exacerbates problems such as insufficient water intake and overheating during dry running, but also causes mechanical wear, equipment failure, and downtime, significantly reducing drainage efficiency and increasing equipment maintenance and replacement costs.

[0006] To address the problem of water pump overheating, some improved solutions have emerged in existing technologies, mostly employing temperature sensor monitoring, electronic shutdown protection, and external heat sinks to achieve overheating prevention. However, these solutions all have significant limitations: electronic temperature control protection is a reactive measure, only stopping the machine after overheating to mitigate damage, and cannot prevent overheating from its root cause; furthermore, the sensors are susceptible to malfunction due to water impurities and humid environments; external heat sinks can only assist air cooling, and their cooling effect is negligible in shallow, dry water conditions, failing to meet the cooling requirements of low-water-level idling.

[0007] In summary, there is currently a lack of dedicated water pumps on the market specifically designed for shallow water conditions with low water levels and many impurities. Traditional equipment generally suffers from industry pain points such as overheating during dry running in shallow water, easy intake of impurities, poor operational stability, short service life, and low operating efficiency, which seriously restrict the efficient implementation of shallow water drainage operations. Summary of the Invention

[0008] To overcome the aforementioned deficiencies of the prior art, this invention provides an overheat-resistant self-cooling water pump suitable for shallow water operations. It ensures continuous and stable water intake at low water levels through layered inlets, preventing idling. A built-in self-cooling circulation heat dissipation component enables active heat dissipation under multiple operating conditions, including immersion, partial immersion, and idling, preventing heat buildup. A multi-stage filtration inlet component thoroughly intercepts impurities in the water, protecting the pump's internal structure, thus solving the problems mentioned in the background section.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] An overheat-resistant self-cooling water pump suitable for shallow water operations includes a pump body, a drive motor is installed inside the pump body, and the water inlet end of the pump body is provided with a layered water inlet, which includes multiple water inlets at different heights to ensure continuous water intake at different water levels.

[0011] The pump body is equipped with a self-cooling circulation heat dissipation component inside. The self-cooling circulation heat dissipation component is linked to the drive shaft of the drive motor and uses the pump's own power to drive the heat dissipation medium to circulate, thereby achieving active heat dissipation.

[0012] The pump body is equipped with a multi-stage filtration water inlet assembly at the water inlet end. The multi-stage filtration water inlet assembly includes a multi-layer filtration structure for graded interception of impurities of different particle sizes in the water.

[0013] Preferably, the layered water inlet includes a low-level main water inlet at the bottom and a high-level auxiliary water inlet on the side wall, wherein the high-level auxiliary water inlet is vertically gradient distributed along the side wall of the pump body.

[0014] Preferably, the distribution height of the stratified inlets (4) covers a water level range of 1cm to 20cm.

[0015] Preferably, the self-cooling circulating heat dissipation component includes a circulating guide impeller and a heat dissipation guide channel; the circulating guide impeller is linked to the drive shaft of the drive motor and is directly driven by the motor; the heat dissipation guide channel connects the heat-generating area with the outside of the pump body to form a heat dissipation circulation loop.

[0016] Preferably, the heat dissipation channel is a plurality of vertical channels, evenly distributed on the inner sidewall of the pump body.

[0017] Preferably, the multi-stage filtration inlet assembly includes a coarse filter layer, a fine filter layer, and a high-precision filter layer. The three-layer filtration structure is nested sequentially from the outside to the inside, and the filtration accuracy increases step by step.

[0018] Preferably, the bottom of the multi-stage filtration water inlet assembly is provided with an impurity collection chamber, which is a detachable structure.

[0019] Preferably, the pump body is provided with a sealed protective shell.

[0020] Preferably, the bottom of the pump body is provided with a fixed base, and the fixed base adopts a weighted anti-slip design.

[0021] Preferably, a pressure relief and flow guide hole is provided at the bottom of the pump body.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This invention achieves a multi-height water intake layout by setting up a layered water inlet, using a main water inlet at the bottom and auxiliary water inlets distributed in a gradient on the side wall. This layout can adapt to shallow water conditions with different water levels and can ensure continuous water intake even at extremely low water levels. It fundamentally solves the core problems of insufficient water intake, pump chamber cavitation, and dry running when traditional water pumps are operating in shallow water, and effectively avoids overheating damage caused by dry running.

[0024] 2. This invention utilizes a self-cooling circulating heat dissipation component to drive the heat dissipation medium to circulate using the power of the drive motor itself, achieving active heat dissipation and overcoming the limitations of traditional water pumps that rely on passive heat dissipation through deep water immersion. Even under conditions of partial immersion, low water flow, or even idling, the heat generated by the motor and pump chamber can still be removed through internal circulation, ensuring that the motor, seals, and bearings are always within the normal operating temperature range. This completely solves problems such as high-temperature aging, burnout, and seal failure, significantly reducing the equipment failure rate.

[0025] 3. This invention, through the setting of multi-stage filtration inlet components, adopts a three-layer nested filtration structure of coarse filtration, fine filtration and fine filtration, with filtration accuracy increasing step by step. It can comprehensively intercept all kinds of impurities in shallow water, from large debris to fine silt and flocculent impurities, and can effectively intercept them. It completely avoids problems such as impeller jamming, pump cavity blockage and structural wear caused by impurities being sucked into the pump body, reduces equipment mechanical wear, slows down the aging rate of components, and significantly extends the service life of the equipment.

[0026] 4. The present invention, through the setting of a detachable impurity collection chamber, can centrally collect the intercepted impurities. During cleaning and maintenance, only the impurity collection chamber needs to be disassembled to complete the impurity cleaning. The operation is simple and convenient, without the need for professional tools and personnel, which greatly reduces the cost of manual operation and maintenance and the cost of downtime loss.

[0027] 5. This invention adopts a mechanical linkage structure design. The self-cooling circulation heat dissipation component is directly driven by the drive motor, eliminating the need for additional sensors, electrical control modules and other precision electrical components. This avoids electrical faults in humid and impurity environments, and has strong anti-interference ability and high durability. The sealed protective shell adopts a fully sealed structure with a high protection level, is waterproof and leak-proof, and greatly improves the safety of equipment operation at the construction site.

[0028] 6. The present invention, through the weighted anti-slip design of the fixed base, can lower the center of gravity of the equipment, increase the friction with the ground, prevent the water pump from shifting or tipping over due to vibration or water flow impact during water pumping, and improve the stability of the equipment in shallow muddy areas.

[0029] 7. This invention has strong adaptability to various scenarios, including shallow water accumulation in building foundation pits, surface water accumulation in construction sites, low-lying water accumulation after rain, and shallow drainage in farmland. It makes up for the shortcomings of existing water pumps in terms of operating conditions, and has strong versatility and practicality, with broad market promotion prospects. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0032] In the diagram: 1. Pump body; 2. Drive motor; 3. Multi-stage filtration inlet assembly; 4. Layered inlet; 5. Self-cooling circulation heat dissipation assembly; 6. Heat dissipation guide channel; 7. Circulation guide impeller; 8. Outlet pipe; 9. Fixed base; 10. Sealed protective shell; 11. Impurity collection chamber; 12. Pressure relief guide hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 2 This invention provides a technical solution: a self-cooling water pump suitable for shallow water operations, comprising a pump body 1, a drive motor 2 internally mounted on the pump body 1, and a layered water inlet 4 at the water inlet end of the pump body 1, the layered water inlet 4 including multiple water inlets at different heights to ensure continuous water intake at different water levels; a self-cooling circulation heat dissipation assembly 5 internally mounted on the pump body 1, the self-cooling circulation heat dissipation assembly 5 being linked with the drive shaft of the drive motor 2, utilizing the pump's own power to drive the heat dissipation medium to circulate and achieve active heat dissipation; and a multi-stage filtration water inlet assembly 3 at the water inlet end of the pump body 1, the multi-stage filtration water inlet assembly 3 including a multi-layer filtration structure for graded interception of impurities of different particle sizes in the water.

[0035] As a preferred embodiment of the present invention, the layered water inlet 4 includes a low-level main water inlet at the bottom and a high-level auxiliary water inlet on the side wall. The high-level auxiliary water inlet is vertically gradient distributed along the side wall of the pump body 1, and the water inlets at different heights correspond to different water level conditions. The distribution height of the layered water inlet 4 covers the water level range of 1cm to 20cm, ensuring that water can continue to enter even at extremely low water levels and avoiding the pump body from running dry.

[0036] When the water level is high, the main inlet at the bottom and all the auxiliary inlets at the top simultaneously receive water to ensure a large flow rate. As the water level gradually drops, the auxiliary inlets at the higher positions gradually emerge above the water surface and stop receiving water, but the auxiliary inlets at the lower positions and the main inlet continue to receive water. Even when the water level drops to an extremely low level, the lowest inlet still receives water, thus achieving continuous water intake across the entire water level range. This completely avoids the problems of insufficient water intake and pump cavity cavitation that occur with traditional water pumps when the water level drops to a certain level.

[0037] As a preferred embodiment of the present invention, the self-cooling circulating heat dissipation component 5 includes a circulating guide impeller 7 and a heat dissipation guide channel 6; the circulating guide impeller 7 is linked to the transmission shaft of the drive motor 2 and is directly driven by the motor; the heat dissipation guide channel 6 connects the heat-generating area with the outside of the pump body to form a heat dissipation circulation loop.

[0038] The circulating guide impeller 7 and the drive shaft of the drive motor 2 are an integral structure, rotating synchronously with the motor. No additional power source is required. When the drive motor 2 is running, the drive shaft drives the main impeller to rotate to achieve the water pumping function. At the same time, it drives the circulating guide impeller 7 to rotate synchronously, driving the heat dissipation medium to circulate in the loop formed by the heat dissipation guide channel 6, continuously carrying away the heat generated by the drive motor 2 and the pump chamber, thus achieving active heat dissipation.

[0039] The heat dissipation channel 6 consists of multiple vertical channels evenly distributed on the inner sidewall of the pump body 1, which increases the heat dissipation area and improves heat dissipation efficiency. Even when most of the pump body is exposed and the external water volume is insufficient, the internally circulating heat dissipation medium can still continuously remove heat, ensuring that the equipment will not overheat and be damaged.

[0040] As a preferred embodiment of the present invention, the multi-stage filtration water inlet assembly 3 includes a coarse filter layer, a fine filter layer and a high-precision filter layer. The three-layer filtration structure is nested from the outside to the inside, and the filtration accuracy is improved step by step.

[0041] The coarse filter layer has a grid structure to intercept large impurities such as stones, construction waste, and fallen leaves; the fine filter layer has a filter screen structure to intercept fine particulate impurities such as silt and small gravel; and the ultrafine filter layer has a filter cotton structure to intercept flocculent and tiny impurities such as plastic fibers and humus. These three filter layers work together to achieve comprehensive interception of impurities of different particle sizes, effectively protecting the internal structure of the pump from wear and clogging caused by impurities.

[0042] The bottom of the multi-stage filtration inlet assembly 3 is equipped with an impurity collection chamber 11, which is used to collect the intercepted impurities. The impurity collection chamber 11 is a detachable structure, which is convenient for cleaning and maintenance. The impurities intercepted by each layer of filtration structure gradually settle into the impurity collection chamber 11 at the bottom under the action of gravity. When cleaning, you only need to remove the impurity collection chamber 11, pour out the collected impurities, and reinstall it. The operation is simple and convenient, without the need to disassemble the entire filtration system.

[0043] The pump body 1 is equipped with a sealed protective shell 10, which adopts a fully sealed waterproof structure and has a protection level of IP68 or above. It is suitable for shallow water operation environments with moisture and impurities. The drive motor 2 and electrical components are all designed with full sealing to effectively prevent water and impurities from entering and ensure long-term stable operation of the equipment in humid and dusty construction environments.

[0044] The bottom of the pump body 1 is equipped with a fixed base 9. The fixed base 9 adopts a weighted anti-slip design to improve the stability of the equipment in shallow muddy areas. The weighted design of the fixed base 9 can lower the center of gravity of the equipment and prevent the water pump from shifting or tipping over due to vibration or water flow impact during the pumping process. The bottom of the base is equipped with anti-slip texture, which can increase the friction with the ground and further improve the placement stability.

[0045] The bottom of the pump body 1 is provided with a pressure relief guide hole 12, which is used to balance the pressure inside and outside the pump body and assist in heat dissipation. The pressure relief guide hole 12 can balance the pressure when the pressure difference between the inside and outside of the pump body is too large, preventing the seals from being damaged due to excessive pressure difference. At the same time, a small amount of water can enter and exit through the pressure relief guide hole 12 to help remove the heat from the bottom and further improve the heat dissipation effect.

[0046] The pump body 1 has a water outlet pipe 8 on its side for discharging the pumped water. The water outlet pipe 8 adopts a standard interface design, which is convenient for connecting to drainage hoses or rigid pipes to adapt to different drainage scenarios.

[0047] The working process of this invention is as follows:

[0048] When in use, place the water pump in a shallow water accumulation area, turn on the power to start the drive motor 2, and the transmission shaft drives the main impeller to rotate at high speed, generating suction force. The water is filtered through the multi-stage filtration inlet assembly 3, enters the pump chamber through the layered inlet 4, and is then discharged through the outlet pipe 8.

[0049] During the water intake process, the water first passes through a multi-stage filtration system 3: a coarse filter layer intercepts large impurities, a fine filter layer intercepts smaller particles, and finally a fine filter layer removes flocculent and minute impurities, ensuring that the water entering the pump is clean and preventing impurities from causing impeller jamming and pump cavity blockage. The intercepted impurities gradually settle into the impurity collection chamber 11 at the bottom, which can be disassembled and cleaned periodically.

[0050] As pumping proceeds, the water level gradually decreases. When the water level is high, the low-level main inlet at the bottom and all the high-level auxiliary inlets on the side wall simultaneously receive water to ensure a large flow rate of drainage. When the water level drops to a certain level, the higher-level auxiliary inlets emerge above the water surface and stop receiving water, but the lower-level auxiliary inlets and the main inlet continue to receive water. Even when the water level drops to an extremely low level, the lowest inlet continues to receive water, thus achieving stable water intake across the entire water level range and preventing the pump chamber from cavitating or running dry.

[0051] During pump operation, the self-cooling circulating heat dissipation component 5 works synchronously: the drive shaft of the drive motor 2 drives the circulating guide impeller 7 to rotate synchronously, driving the heat dissipation medium to circulate in the loop formed by the heat dissipation guide channel 6, continuously absorbing the heat generated by the drive motor 2 and the pump chamber and dissipating it through the heat dissipation channel. Even when most of the pump body is exposed and the external water volume is insufficient, the internally circulating heat dissipation medium can still continuously remove heat, ensuring that the equipment temperature is always within a safe range and that overheating damage will not occur.

[0052] It should be noted that the device structure and accompanying drawings of this invention mainly describe the principle of the invention. The technical details of the device's control system, etc., are not fully described. However, those skilled in the art, understanding the principles of the invention, can clearly understand the specifics of its control system. All standard parts used can be purchased commercially, and can be customized according to the description and drawings. The specific connection methods for each part employ conventional methods such as bolts, welding, and sealing connections, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the structure and principles of components known to those skilled in the art can be obtained through technical manuals or conventional experimental methods.

[0053] Furthermore, those skilled in the art should understand that the layered water inlet of the present invention is not limited to the specific number and distribution of the water inlets mentioned above, and the number, size and distribution height of the water inlets can be adjusted according to actual needs; the self-cooling circulation heat dissipation component is not limited to the specific circulation form mentioned above, and other structural forms that can utilize the power of the water pump itself to achieve the circulation of the heat dissipation medium can also be adopted; the multi-stage filtration water inlet component is not limited to a three-layer filtration structure, and the number of filtration layers and filtration accuracy can be adjusted according to the actual water quality conditions. These equivalent substitutions should all be covered within the protection scope of the present invention.

[0054] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cooling water pump suitable for shallow water operations, characterized in that, The pump body (1) includes a drive motor (2) inside the pump body (1). The pump body (1) has a layered water inlet (4) at the water inlet end. The layered water inlet (4) includes multiple water inlets at different heights to ensure continuous water intake at different water levels. The pump body (1) is equipped with a self-cooling circulation heat dissipation component (5). The self-cooling circulation heat dissipation component (5) is linked with the drive shaft of the drive motor (2). The heat dissipation medium is driven to circulate by the pump's own power to achieve active heat dissipation. The pump body (1) is provided with a multi-stage filtration water inlet assembly (3) at the water inlet end. The multi-stage filtration water inlet assembly (3) includes a multi-layer filtration structure for graded interception of impurities of different particle sizes in the water.

2. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The layered water inlet (4) includes a bottom low-level main water inlet and a side wall high-level auxiliary water inlet, and the high-level auxiliary water inlet is vertically gradient distributed along the side wall of the pump body (1).

3. The self-cooling water pump for shallow water operations according to claim 2, characterized in that, The distribution height of the layered inlets (4) covers the water level range of 1cm to 20cm.

4. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The self-cooling circulating heat dissipation component (5) includes a circulating guide impeller (7) and a heat dissipation guide channel (6); the circulating guide impeller (7) is linked to the drive shaft of the drive motor (2) and is directly driven by the motor; the heat dissipation guide channel (6) connects the heat-generating area with the outside of the pump body (1) to form a heat dissipation circulation loop.

5. The self-cooling water pump for shallow water operations according to claim 4, characterized in that, The heat dissipation channel (6) consists of multiple vertical channels that are evenly distributed on the inner sidewall of the pump body (1).

6. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The multi-stage filtration water inlet assembly (3) includes a coarse filter layer, a fine filter layer and a high-precision filter layer. The three-layer filtration structure is nested from the outside to the inside, and the filtration accuracy is improved step by step.

7. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The bottom of the multi-stage filtration water inlet assembly (3) is provided with an impurity collection chamber (11), which is a detachable structure.

8. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The pump body (1) is provided with a sealed protective shell (10).

9. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The bottom of the pump body (1) is provided with a fixed base (9), which adopts a weighted anti-slip design.

10. The self-cooling water pump for shallow water operations according to claim 1, characterized in that, The bottom of the pump body (1) is provided with a pressure relief guide hole (12).

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