Impeller pump, spraying system and plant protection equipment

Abstract

The invention discloses an impeller pump, a spraying system and plant protection equipment, and the impeller pump comprises a pump shell which comprises a first shell and a second shell, and the first shell and the second shell define a pump cavity; at least one of the first shell and the second shell is provided with a water inlet joint, and at least one of the first shell and the second shell is provided with a water outlet joint; the impeller is rotatably mounted in the pump cavity; the impeller comprises an impeller core and a plurality of blades connected to the periphery of the impeller core, a plurality of separated water storage cavities are defined between the impeller and the pump shell, when the impeller rotates to any position, the water storage cavity communicated with the water inlet connector is a water inlet cavity, the water storage cavity communicated with the water outlet connector is a water outlet cavity, and the water inlet cavity and the water outlet cavity are always kept separated; and the cavity wall of at least one of the water inlet cavity and the water outlet cavity is always formed by the impeller and the wall surface of one shell. According to the scheme, the problem that liquid medicine permeates into the water outlet chamber from the water inlet chamber after the impeller is shut down can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of liquid pumps, and more particularly to an impeller pump, a spraying system, and plant protection equipment. Background Technology

[0002] With the development of agricultural technology, automated pesticide spraying equipment is playing an increasingly important role in agricultural plant protection. It can significantly improve the automation level of field activities, reducing manpower and increasing operational efficiency. Specifically, unmanned vehicles or drones are used to carry pesticide tanks, along with impeller pumps and spray discs. Driven by the impeller pump, the pesticide solution in the tank is continuously pumped to the spray discs for atomization, ensuring that the atomized droplets evenly cover the crops.

[0003] Industry standards require that no more pesticide dripping from the spray plate after the impeller pump stops. However, existing impeller pumps cannot effectively seal the inlet and outlet of the pump casing after the impeller is shut down. A small amount of pesticide can flow through gaps in the pump casing, and due to siphon action, pesticide in the tank can still slowly flow out through the impeller pump after it is shut down, leading to dripping at the spray plate. To overcome this problem, existing technologies typically require the installation of an anti-drip valve in the pipeline between the impeller pump and the spray plate. After the impeller pump stops, the anti-drip valve closes to prevent further flow of pesticide in the pipeline, thus preventing dripping.

[0004] Although adding an anti-drip valve can effectively prevent dripping, it obviously complicates the structure of the entire chemical spraying system and increases the system cost. Summary of the Invention

[0005] The purpose of this invention is to provide an impeller pump, a spraying system, and plant protection equipment that can solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] On the one hand, an impeller pump is provided, comprising:

[0008] The pump casing includes a first casing and a second casing, which together form a pump cavity; at least one of the first casing and the second casing is provided with a water inlet connector, and at least one of them is provided with a water outlet connector;

[0009] An impeller is rotatably mounted inside the pump chamber. The impeller includes a hub and multiple blades connected to the periphery of the hub. The impeller and the pump casing enclose multiple spaced water storage chambers. When the impeller is rotated to any position, the water storage chamber connected to the inlet connector is the inlet chamber, and the water storage chamber connected to the outlet connector is the outlet chamber. The inlet chamber and the outlet chamber are always separated. At least one of the inlet chamber and the outlet chamber has its wall always formed by the impeller and the wall of one of the casings.

[0010] Optionally, at least one of the first housing and the second housing is provided with a water inlet connector, and at least one of them is provided with a water outlet connector.

[0011] Optionally, the first housing is provided with the water inlet connector and / or the water outlet connector. The first housing includes a first base plate, a second base plate, and a side wall plate. The first base plate and the second base plate are arranged in parallel, and the side wall plate is connected between the first base plate and the second base plate. This allows the first housing to be individually enclosed with the impeller to form the water inlet chamber and / or the water outlet chamber.

[0012] Optionally, a first chamber is formed inside the first housing, and an installation opening is provided on one side of the first housing, which is formed by the first bottom plate, the second bottom plate and the side wall plate. The impeller can be installed into the first chamber through the installation opening. The second housing covers the side of the first housing with the installation opening, and the second housing forms a second chamber. The first chamber and the second chamber together constitute the pump chamber.

[0013] Optionally, a first chamber is formed inside the first housing, and an installation opening is provided on one side of the first housing, which is formed by the first bottom plate and the side wall plate, or by the second bottom plate and the side wall plate, through which the impeller can be installed into the first chamber; the second housing covers the side of the first housing with the installation opening, and the second housing forms a second chamber, and the first chamber and the second chamber together constitute the pump chamber.

[0014] Optionally, the first bottom plate, the second bottom plate, or the side wall of the first housing is provided with an installation opening that allows the impeller to be installed into the pump housing, and the second housing is a cover plate structure corresponding to the installation opening.

[0015] Optionally, the first housing has a connecting groove around the edge of the mounting opening, and the second housing has a connecting boss corresponding to the connecting groove, the connecting boss being embedded in the connecting groove.

[0016] Optionally, the connecting groove is a wedge-shaped groove, and the connecting boss is a corresponding wedge shape.

[0017] Optionally, the first housing and / or the second housing are provided with a waterproof groove surrounding the mounting opening, and a waterproof ring is installed in the waterproof groove. The two sides of the waterproof ring abut against the first housing and the second housing respectively to form a waterproof barrier.

[0018] Optionally, the first base plate is provided with a coupling hole, through which the drive shaft of the motor extends into the pump chamber and connects to the impeller.

[0019] Optionally, the drive shaft includes a rotating shaft, a connecting member, and a sealing ring. The sealing ring is sleeved on the rotating shaft, the connecting member is fixedly connected to the end of the rotating shaft, the connecting member extends into the pump chamber to connect to the impeller, and the sealing ring is in close contact with the wall surface of the connecting hole to form a seal.

[0020] Optionally, a threaded connection hole is provided on the side of the first housing that mates with the second housing, and a corresponding positioning hole is provided on the second housing. A connecting screw passes through the positioning hole and is screwed into the threaded connection hole, thereby fixing the second housing onto the first housing.

[0021] Optionally, the motor includes a motor housing and a connecting plate fixed to the motor housing. The connecting plate is fitted to the first base plate, and the pump housing has a first connecting hole. The connecting plate has a second connecting hole. A bolt assembly passes through the first connecting hole and the second connecting hole to lock the motor to one side of the pump housing.

[0022] On the other hand, a spraying system is provided, including a liquid tank, a spray disc, and the aforementioned impeller pump, wherein the inlet of the impeller pump is connected to the liquid tank via a first pipe, and the outlet of the impeller pump is connected to the spray disc via a second pipe.

[0023] On the other hand, a plant protection device is provided, including a vehicle and the aforementioned spraying system mounted on the vehicle.

[0024] The beneficial effects of this application are as follows: This invention provides an impeller pump that, regardless of the impeller's rotation angle, ensures that at least one of the water storage chamber and the outlet chamber has its wall composed solely of the impeller and the wall of one of the housings. For the impeller itself, the first housing itself, and the second housing itself, there are no seams in the integrated structure, thus eliminating liquid leakage. Simultaneously, because the contact between the impeller and the first / second housings is flexible, effective sealing between the impeller and the first / second housings is achieved. This ensures that at least one of the inlet and outlet chambers can be completely sealed and isolated from other chambers, preventing the liquid from seeping from the inlet chamber into the outlet chamber after the impeller is shut down. Therefore, by ensuring the internal sealing of the impeller pump after shutdown, when this impeller pump is applied to a spray system, there is no need to install an anti-drip valve at the outlet end of the impeller pump, thus solving the problem of dripping after the impeller is shut down.

[0025] In summary, compared with existing technologies, the impeller pump using this solution eliminates the need for an anti-drip valve, simplifies the structure of the spray system, reduces operating costs, and improves system reliability. Attached Figure Description

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Figure 1 A cross-sectional view of an existing impeller pump;

[0028] Figure 2 This is a schematic diagram of the impeller pump described in an embodiment of this application from one perspective;

[0029] Figure 3 This is a schematic diagram of the impeller pump described in an embodiment of this application from another perspective;

[0030] Figure 4 This is a schematic diagram of the impeller pump under an explosion state as described in the embodiments of this application, taken from one perspective.

[0031] Figure 5 This is a structural schematic diagram of the impeller pump described in the embodiment of this application under an explosion state from another perspective;

[0032] Figure 6 This is a cross-sectional view of the impeller pump described in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the structure of one embodiment of the first housing in this application.

[0034] Figure 8 for Figure 7 A schematic diagram of the first housing from another perspective;

[0035] Figure 9 This is a schematic diagram of the structure of one embodiment of the second housing in this application.

[0036] Figure 10 for Figure 9 A schematic diagram of the second housing from another perspective;

[0037] Figure 11 This is a schematic diagram of another embodiment of the pump casing described in this application.

[0038] Figure 12 This is a schematic diagram of yet another embodiment of the pump casing described in this application.

[0039] Figure 13 This is a schematic diagram of another embodiment of the pump casing described in this application.

[0040] Figure 1 middle:

[0041] 01. Shell base; 02. Shell top cover; 03. Flexible impeller.

[0042] Figure 2-13 middle:

[0043] 1. Pump casing; 11. First casing; 111. First base plate; 1111. Coupling hole; 112. Second base plate; 113. Side wall plate; 114. Connecting groove; 115. Waterproof groove; 116. Threaded connection hole; 117. Mounting opening; 12. Second casing; 121. Connecting boss; 122. Positioning hole; 13. Water inlet connector; 14. Water outlet connector; 15. Pump chamber; 151. First chamber; 152. Second chamber; 16. First connecting hole; 2. Impeller; 21. Impeller core; 22. Blade; 3. Motor; 31. Drive shaft; 311. Rotating shaft; 312. Connecting piece; 313. Sealing ring; 32. Motor housing; 33. Connecting plate; 331. Second connecting hole. Detailed Implementation

[0044] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" 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 invention based on the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] With the development of agricultural technology, automated pesticide spraying equipment is playing an increasingly important role in agricultural plant protection. It can significantly improve the automation level of field activities, reducing manpower and increasing operational efficiency. Specifically, unmanned vehicles or drones are used to carry pesticide tanks, along with impeller pumps and spray discs. Driven by the impeller pump, the pesticide solution in the tank is continuously pumped to the spray discs for atomization, ensuring that the atomized droplets evenly cover the crops.

[0048] Industry standards require that no more pesticide dripping from the spray plate after the impeller pump stops. However, existing impeller pumps cannot effectively seal the inlet and outlet of the pump casing after the impeller is shut down. A small amount of pesticide can flow through gaps in the pump casing, and due to siphon action, pesticide in the tank can still slowly flow out through the impeller pump after it is shut down, leading to dripping at the spray plate. To overcome this problem, existing technologies typically require the installation of an anti-drip valve in the pipeline between the impeller pump and the spray plate. After the impeller pump stops, the anti-drip valve closes to prevent further flow of pesticide in the pipeline, thus preventing dripping.

[0049] Although adding an anti-drip valve can effectively prevent dripping, it obviously complicates the structure of the entire chemical spraying system and increases the system cost.

[0050] Through careful research, the inventors of this application discovered that the reason existing impeller pumps cannot achieve effective sealing is mainly due to defects in the pump casing structure. (Refer to...) Figure 1 A traditional impeller pump casing includes an axially opposed base 01 and a top cover 02. A pump chamber is formed on the top side of the base 01 to accommodate a flexible impeller 03. The top cover 02 covers the top side of the base 01. The flexible impeller 03 is installed in the pump chamber, dividing the pump chamber into multiple independent water storage chambers. When the flexible impeller 03 rotates, the water in each water storage chamber is propelled, drawing water from the water storage chamber connected to the inlet connector and draining water from the water outlet connector. The flexible impeller 03 has its lower bottom surface and outer circular surface in contact with the housing base 01, while its upper bottom surface is in contact with the housing cover 02. Therefore, each water storage chamber is enclosed by the flexible impeller 03, the housing base 01, and the housing cover 02. The flexible impeller 03 is a flexible structure, and its contact with the pump casing is flexible. Thus, a complete seal can be achieved at the contact position between the flexible impeller 03 and the pump casing. However, the housing base 01 and the housing cover 02 are both rigid structures. Due to limitations in processing precision, there will inevitably be a certain gap between the rigid housing base 01 and the housing cover 02. Therefore, liquid can flow between the water storage chambers through the gap between the housing base 01 and the housing cover 02, which leads to insufficient sealing performance of the impeller pump itself. Even after the flexible impeller is shut down, liquid can still seep from the inlet chamber to the outlet chamber.

[0051] To overcome the above technical problems, refer to Figure 2-13 This embodiment provides an impeller pump, including a pump casing 1 and an impeller 2 installed inside the pump casing 1. This embodiment effectively improves the sealing performance between the inlet chamber and the outlet chamber by solving the problem of mutual flow between them through the gap at the joint of the pump casing 1, thereby effectively improving the sealing performance inside the impeller pump.

[0052] In its specific structure, the pump casing 1 includes a first casing 11 and a second casing 12, which together form a pump cavity 15. At least one of the first casing 11 and the second casing 12 is provided with a water inlet connector 13, and at least one of them is provided with a water outlet connector 14. The pump casing 1 is formed by combining the first casing 11 and the second casing 12 to facilitate the installation of the impeller 2 into the pump cavity 15. That is, during assembly, the impeller 2 is first installed into either the first casing 11 or the second casing 12, and then the first casing 11 and the second casing 12 are assembled and fixed. The fact that at least one of the first casing 11 and the second casing 12 is provided with a water inlet connector 13 and at least one of them is provided with a water outlet connector 14 indicates that at least one water inlet connector 13 can be provided, and multiple water outlet connectors can be provided as needed. Similarly, at least one water outlet connector 14 can be provided, and multiple water outlet connectors can be provided as needed. The first shell 11 and the second shell 12 are integrally formed structures, that is, there are no gaps at the joints of the wall panels in the first shell 11 and there are no gaps at the joints of the wall panels in the second shell 12.

[0053] The impeller 2 is rotatably mounted inside the pump chamber 15. The impeller 2 includes a hub 21 and multiple blades 22 connected to the periphery of the hub 21. The impeller 2 and the pump casing 1 enclose multiple spaced water storage chambers. When the impeller 2 is rotated to any position, the water storage chamber connected by the inlet connector 13 is the inlet chamber, and the water storage chamber connected by the outlet connector 14 is the outlet chamber. The inlet chamber and the outlet chamber are always separated. At least one of the inlet chamber and the outlet chamber has its wall always formed by the impeller 2 and the wall of one of the casings.

[0054] The pump chamber 15, located within the pump casing 1, comprises an upper bottom wall, a lower bottom wall, and side walls. The upper and lower bottom walls are parallel to each other, and the side walls connect between them. The impeller 2 includes a hub 21 and multiple blades 22 connected to the periphery of the hub 21. The entire impeller 2 has a star-shaped structure. The roots of the blades 22 are connected to the hub 21, their outer edges contact the side walls of the pump chamber 15, and their two sides contact the upper and lower bottom walls of the pump chamber 15, respectively. This forms a water storage chamber between any two adjacent blades 22. Since the impeller 2 rotates during operation, the water storage chambers also circulate. For ease of explanation, in this design, the water storage chamber connected to the inlet connector 13 under any circumstances is defined as the inlet chamber, and the water storage chamber connected to the outlet connector 14 is defined as the outlet chamber. When the thickness of the blade 22 is less than the inner diameter of the water inlet connector 13, there may be two water storage chambers connected to the water inlet connector 13 at the same time. Therefore, there may be one or two water inlet chambers; similarly, there may also be one or two water outlet chambers.

[0055] To achieve a sealed interior for the impeller 22 pump, this design ensures that the inlet chamber and outlet chamber are always separated under any circumstances. The wall of at least one of them is always formed by the impeller 2 and the wall of one of the housings. This design allows for a complete seal between the inlet and outlet chambers under any circumstances, thus solving the problem of liquid in the inlet chamber seeping into the outlet chamber through gaps.

[0056] The specific sealing principle of this scheme is as follows: Assuming the inlet connector 13 is located in the first housing 11, the wall of the inlet chamber is always formed by the impeller 2 and the wall of the first housing 11. Since the first housing 11 is a single-piece structure, there are no gaps at the joints of the wall panels. Similarly, there are no gaps in the structure of the impeller 2 itself. Moreover, since the impeller 2 is a flexible structure, it makes flexible contact with the first housing 11, thus achieving a complete seal at the contact point between the impeller 2 and the first housing 11. Therefore, there is no problem of mutual permeation between the walls of the inlet chamber and other water storage chambers. That is, when the impeller 2 is turned off, water in the inlet chamber cannot permeate into the outlet chamber, thereby achieving the purpose of sealing the inside of the impeller pump. Similarly, when the outlet chamber is set as a separately sealed chamber, when the impeller 2 is turned off, water in other water storage chambers cannot enter the outlet chamber, also achieving the purpose of sealing the inside of the impeller pump.

[0057] In summary, based on this embodiment, the impeller pump ensures that at least one of the water storage chamber and the water outlet chamber has its wall composed solely of the impeller 2 and the wall of one of the housings, regardless of the impeller 2's rotation angle. There are no seams in the integrated structure for the impeller 2, the first housing 11, and the second housing 12, thus eliminating liquid leakage. Furthermore, since the contact between the impeller 2 and the first / second housings 11 and 12 is flexible, effective sealing between the impeller 2 and these housings is achieved. This ensures that at least one of the inlet and outlet chambers is completely sealed and isolated from other chambers, preventing the liquid from seeping from the inlet chamber into the outlet chamber after the impeller 2 is shut down. Therefore, by ensuring the impeller pump's internal sealing after shutdown, when this impeller pump is applied to a spray system, there is no need to install an anti-drip valve at the pump's outlet, thus resolving the leakage problem after the impeller 2 is shut down.

[0058] In summary, compared with existing technologies, the impeller pump using this solution eliminates the need for an anti-drip valve, simplifies the structure of the spray system, reduces operating costs, and improves system reliability.

[0059] In one embodiment, only one of the first housing 11 and the second housing 12 is provided with a water inlet connector 13, and only one of them is provided with a water outlet connector 14.

[0060] Using a single inlet connector 13 and a single outlet connector 14 is more suitable for plant protection spraying. The fact that only one of them has an inlet connector 13 and only one of them has an outlet connector 14 indicates that: the inlet connector 13 and the outlet connector 14 are both located in the first housing 11; or, the inlet connector 13 and the outlet connector 14 are both located in the second housing 12; or, the inlet connector 13 is located in the first housing 11 and the outlet connector 14 is located in the second housing 12; or, the outlet connector 14 is located in the first housing 11 and the inlet connector 13 is located in the second housing 12.

[0061] In one embodiment, reference is made to Figure 7 and Figure 8 The first housing 11 is provided with the water inlet connector 13 and / or the water outlet connector 14. The first housing 11 includes a first base plate 111, a second base plate 112 and a side wall plate 113. The first base plate 111 and the second base plate 112 are arranged in parallel, and the side wall plate 113 is connected between the first base plate 111 and the second base plate 112. This allows the first housing 11 to be enclosed by the impeller 2 to form the water inlet chamber and / or the water outlet chamber.

[0062] Specifically, the first housing 11 includes a first base plate 111 and a second base plate 112, which are arranged in parallel. A side wall plate 113 is connected between the first base plate 111 and the second base plate 112, thus forming a semi-enclosed space within the first housing 11. There are no gaps between the first base plate 111 and the side wall plate 113, or between the second base plate 112 and the side wall plate 113, within the first housing 11, thus eliminating leakage problems caused by the structure of the first housing 11 itself.

[0063] When the inlet connector 13 is located in the first housing 11, the impeller 2, the first base plate 111, the second base plate 112, and the side wall plate 113 of the first housing 11 can be individually enclosed to form an inlet chamber communicating with the inlet connector 13. This inlet chamber is completely isolated from other water storage chambers. Similarly, when the outlet connector 14 is located in the first housing 11, the outlet chamber can also be completely isolated from other water storage chambers. Therefore, based on the above structure of the first housing 11, a stable enclosure with the impeller 2 can be achieved to form a sealed inlet chamber and / or outlet chamber, effectively ensuring the reliability of the seal inside the impeller pump.

[0064] In one embodiment, reference is made to Figures 2-10The first housing 11 has a first chamber 151. One side of the first housing 11 has an installation opening 117 formed by the first bottom plate 111, the second bottom plate 112, and the side wall plate 113. The impeller 2 can be installed into the first chamber 151 through the installation opening 117. The second housing 12 covers the side of the first housing 11 with the installation opening 117, and the second housing 12 has a second chamber 152. The first chamber 151 and the second chamber 152 together constitute the pump chamber 15.

[0065] In this embodiment, the pump chamber 15 is divided into a first chamber 151 and a second chamber 152 in the first housing 11 and the second housing 12. The mounting opening 117 for mounting the impeller 2 is formed by the first base plate 111, the second base plate 112 and the side wall plate 113. Thus, during assembly, the impeller 2 can be easily inserted into the first chamber 151 in the radial direction, and then the second housing 12 can be closed and fixed. Therefore, this structure has the advantage of facilitating the assembly of the impeller 2.

[0066] In practice, the first chamber 151 and the second chamber 152 can be allocated according to requirements, thereby determining the shape of the first shell 11 and the second shell 12. Preferably, the splicing surface of the first shell 11 and the second shell 12 is a plane parallel to the axial direction.

[0067] In another embodiment, refer to Figure 11 The first housing 11 has a first chamber 151. One side of the first housing 11 is provided with an installation opening 117 formed by the first bottom plate 111 and the side wall plate 113, or by the second bottom plate 112 and the side wall plate 113. The impeller 2 can be installed into the first chamber 151 through the installation opening 117. The second housing 12 covers the side of the first housing 11 with the installation opening 117, and the second housing 12 has a second chamber 152. The first chamber 151 and the second chamber 152 together constitute the pump chamber 15.

[0068] The difference between this embodiment and the previous embodiment is that the mounting opening 117 is formed between the first base plate 111 and the side wall plate 113, or between the second base plate 112 and the side wall plate 113. Similarly, this type of mounting opening 117 can also allow the impeller 2 to be installed.

[0069] In another embodiment, reference is made to Figures 12-13 The first base plate 111, the second base plate 112, or the side wall plate 113 of the first housing 11 are provided with an installation opening 117 that allows the impeller 2 to be installed into the pump housing 1, and the second housing 12 is a cover plate structure corresponding to the installation opening 117.

[0070] In this embodiment, the mounting opening 117 is formed only on the first base plate 111, the second base plate 112, or the side wall plate 113, which also allows the impeller 2 to be installed.

[0071] In one embodiment, combined with Figure 4 , Figure 7 and Figure 9 The first housing 11 has a connecting groove 114 around the edge of the mounting opening 117, and the second housing 12 has a connecting boss 121 corresponding to the connecting groove 114, the connecting boss 121 being embedded in the connecting groove 114.

[0072] The second housing 12 is provided with a connecting boss 121 corresponding to the connecting groove 114 on the first housing 11. The connecting boss 121 is designed to be precisely embedded in the connecting groove 114 of the first housing 11. The fit between the boss and the groove not only ensures that the second housing 12 can be accurately installed on the first housing 11, but also increases the connection strength between the two through physical contact. Importantly, the fit between the connecting boss 121 and the connecting groove 114 can effectively ensure the assembly accuracy of the first housing 11 and the second housing 12, so that the cavity wall of the pump chamber 15 can have a higher flatness at the junction of the first housing 11 and the second housing 12, reducing the problem of impeller 2 wear caused by undulations at the junction.

[0073] In one embodiment, the connecting groove 114 is a wedge-shaped groove, and the connecting boss 121 is a corresponding wedge shape.

[0074] Specifically, the width of the groove opening of the connecting groove 114 is greater than the width of the groove bottom. The wedge-shaped groove is characterized by its width gradually changing along the depth direction, forming one or more inclined surfaces. This design allows the connecting groove 114 to provide a certain guiding and self-locking effect when receiving the connecting boss 121, making it easier for the boss to slide into the inclined surface of the connecting groove 114 during installation until it reaches the predetermined installation position. This helps to reduce the difficulty and error of alignment during installation.

[0075] In one embodiment, reference is made to Figure 7 The first housing 11 and / or the second housing 12 are provided with a waterproof groove 115 surrounding the mounting opening 117. A waterproof ring is installed in the waterproof groove 115, and the two sides of the waterproof ring abut against the first housing 11 and the second housing 12 respectively to form a waterproof barrier.

[0076] A waterproof ring is installed in the waterproof groove 115, and its shape and size match the groove. The waterproof ring is typically made of an elastic material, such as rubber or silicone, to ensure that it can be tightly compressed and adhered to the two contact surfaces of the first housing 11 and the second housing 12 after installation. When the first housing 11 and the second housing 12 are tightly connected together by structures such as the connecting groove 114 and the connecting boss 121, the waterproof ring is clamped between them and subjected to compressive force. This compressive force causes the material of the waterproof ring to deform, thereby filling the tiny gaps between the housings and forming a tight waterproof barrier. Based on the waterproof ring, even when the pump is in operation and subjected to vibration or pressure changes, the waterproof ring can maintain its sealing performance, preventing the leakage of liquid from the pump chamber 15 and ensuring the long-term stable operation of the pump.

[0077] In one embodiment, reference is made to Figure 8 The first base plate 111 is provided with a coupling hole 1111, and the drive shaft 31 of the motor 3 extends through the coupling hole 1111 to the pump chamber 15 to connect the impeller 2.

[0078] A coupling hole 1111 is provided on the first base plate 111, allowing the drive shaft 31 of the motor 3 to pass smoothly through the first housing 11 and extend into the pump chamber 15, thereby achieving direct connection with the impeller 2. The connection between the drive shaft 31 and the impeller 2 includes, but is not limited to, keyed connection, splined connection, pin connection, or threaded connection, depending on the type of motor 3, the structure of the impeller 2, and design requirements. Regardless of the connection method used, it is necessary to ensure the robustness and reliability of the connection to transmit sufficient power and withstand the load during operation.

[0079] During assembly, first install the impeller 2 into the first housing 11, adjust the position of the impeller 2 so that the connecting hole at its center is aligned with the shaft connecting hole 1111, then extend the drive shaft 31 of the motor 3 into the pump chamber 15 through the shaft connecting hole 1111 and connect and fix it to the impeller 2, then install the second housing 12, and finally lock all the components with parts such as bolts and screws.

[0080] In one embodiment, reference is made to Figure 6 The drive shaft 31 includes a rotating shaft 311, a connecting member 312, and a sealing ring 313. The sealing ring 313 is sleeved on the rotating shaft 311. The connecting member 312 is fixedly connected to the end of the rotating shaft 311. The connecting member 312 extends into the pump chamber 15 to connect the impeller 2. The sealing ring 313 is in close contact with the wall surface of the connecting hole 1111 to form a seal.

[0081] The connecting piece 312 is fixedly connected to the end of the rotating shaft 311 and extends into the pump chamber 15 to connect to the impeller 2. It plays a key role in transmitting the power of the rotating shaft 311 to the impeller 2. It can be a spline, threaded column, or other structure. In order for the connecting piece 312 to pass smoothly through the connecting hole 1111, its outer diameter should be smaller than the diameter of the connecting hole 1111.

[0082] A sealing ring 313 is fitted onto the rotating shaft 311 and forms a seal by tightly contacting the wall of the coupling hole 1111. Its main function is to prevent fluid from leaking to the outside of the pump chamber 15 through the gap between the rotating shaft 311 and the coupling hole 1111. The sealing ring 313 is usually made of an elastic material, such as rubber or silicone, to ensure that it can fit tightly against the walls of the rotating shaft 311 and the coupling hole 1111 after installation. After installation, the sealing ring 313 is compressed between the walls of the rotating shaft 311 and the coupling hole 1111, thereby strengthening the tightness of the fit. This tight fit can effectively prevent fluid from leaking through the gap and maintain the sealing of the pump chamber 15.

[0083] In one embodiment, a threaded connection hole 116 is provided on the side of the first housing 11 that is connected to the second housing 12, and a positioning hole 122 is provided on the second housing 12. A connecting screw passes through the positioning hole 122 and is screwed to the threaded connection hole 116, thereby fixing the second housing 12 to the first housing 11.

[0084] Using connecting screws to fasten the first housing 11 and the second housing 12 after docking provides a reliable fastening effect, capable of withstanding various forces and vibrations during operation, and ensuring the stability of the entire impeller pump. When it is necessary to disassemble or replace parts, the first housing 11 and the second housing 12 can be easily separated simply by loosening the connecting screws, reducing maintenance difficulty and time costs.

[0085] In one embodiment, the motor 3 includes a motor housing 31 and a connecting plate 33 fixed to the motor housing 31. The connecting plate 33 is disposed in close contact with the first base plate 111. The pump housing 1 is provided with a first connecting hole 16, and the connecting plate 33 is provided with a second connecting hole 331. A bolt assembly passes through the first connecting hole 16 and the second connecting hole 331 to lock the motor 3 to one side of the pump housing 1.

[0086] The bolt assembly includes a bolt and a nut. During installation, the bolt passes through the first connecting hole 16 and the second connecting hole 331 and is then threaded and tightened with the nut, thus reliably connecting the connecting plate 33 to the pump housing 1. By tightly connecting the connecting plate 33 on the motor housing 31 to the pump housing 1 using the bolt assembly, a stable installation of the motor 3 is achieved. This connection method can resist external vibration and impact, ensuring the stability of the motor 3 during operation, while also ensuring the stable rotation of the impeller 2.

[0087] On the other hand, a spraying system is provided, including a liquid tank, a spray disc, and the aforementioned impeller pump. The inlet connector 13 of the impeller pump is connected to the liquid tank via a first pipe, and the outlet connector 14 of the impeller pump is connected to the spray disc via a second pipe.

[0088] In the spraying system of this embodiment, during operation, the pesticide solution is stored in the pesticide solution tank. When the impeller pump is started, the impeller pump continuously pumps the pesticide solution to the spray disc, where it is atomized and sprayed onto the crops.

[0089] Based on the excellent internal sealing performance of the impeller pump in this embodiment, there is no need to install an anti-drip valve between the impeller pump and the spray disc to avoid the dripping problem after the impeller pump is shut down. Therefore, the spraying system of this solution has the advantages of simple structure and low cost.

[0090] On the other hand, a plant protection device is provided, including a vehicle and the aforementioned spraying system mounted on the vehicle.

[0091] The vehicle can be, but is not limited to, unmanned vehicles, drones, etc., and can carry the spraying system for mobile spraying operations.

[0092] Based on the spraying system of this embodiment, the plant protection equipment of this embodiment also has the advantages of simple structure and low cost.

[0093] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0094] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0095] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0096] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An impeller pump, characterized in that, include: The pump casing (1) includes a first casing (11) and a second casing (12), the first casing (11) and the second casing (12) enclosing a pump cavity (15); at least one of the first casing (11) and the second casing (12) is provided with a water inlet connector (13) and at least one of them is provided with a water outlet connector (14); An impeller (2) is rotatably mounted inside the pump chamber (15). The impeller (2) includes a hub (21) and multiple blades (22) connected to the periphery of the hub (21). The impeller (2) and the pump casing (1) enclose multiple spaced water storage chambers. When the impeller (2) is rotated to any position, the water storage chamber connected by the inlet connector (13) is the inlet chamber, and the water storage chamber connected by the outlet connector (14) is the outlet chamber. The inlet chamber and the outlet chamber are always separated. At least one of the inlet chamber and the outlet chamber has its wall always formed by the impeller (2) and the wall of one of the casings.

2. The impeller pump according to claim 1, characterized in that, Of the first housing (11) and the second housing (12), at least one is provided with a water inlet connector (13), and at least one is provided with a water outlet connector (14).

3. The impeller pump according to claim 1, characterized in that, The first housing (11) is provided with the water inlet connector (13) and / or the water outlet connector (14). The first housing (11) includes a first base plate (111), a second base plate (112), and a side wall plate (113). The first base plate (111) and the second base plate (112) are arranged in parallel, and the side wall plate (113) is connected between the first base plate (111) and the second base plate (112). This allows the first housing (11) to be able to form the water inlet chamber and / or the water outlet chamber by enclosing the impeller (2) alone.

4. The impeller pump according to claim 3, characterized in that, The first housing (11) has a first chamber (151) formed inside it. The first housing (11) has an installation opening (117) on one side, which is formed by the first bottom plate (111), the second bottom plate (112) and the side wall plate (113). The impeller (2) can be installed into the first chamber (151) through the installation opening (117). The second housing (12) covers the side of the first housing (11) with the installation opening (117) and the second housing (12) has a second chamber (152). The first chamber (151) and the second chamber (152) together constitute the pump chamber (15).

5. The impeller pump according to claim 3, characterized in that, The first housing (11) has a first chamber (151) formed inside it. The first housing (11) has an installation opening (117) formed by the first bottom plate (111) and the side wall plate (113), or by the second bottom plate (112) and the side wall plate (113). The impeller (2) can be installed into the first chamber (151) through the installation opening (117). The second housing (12) covers the side of the first housing (11) with the installation opening (117) and the second housing (12) has a second chamber (152). The first chamber (151) and the second chamber (152) together constitute the pump chamber (15).

6. The impeller pump according to claim 3, characterized in that, The first base plate (111), the second base plate (112), or the side wall plate (113) of the first housing (11) is provided with an installation opening (117) that allows the impeller (2) to be installed into the pump housing (1), and the second housing (12) is a cover plate structure corresponding to the installation opening (117).

7. The impeller pump according to any one of claims 4-6, characterized in that, The first housing (11) has a connecting groove (114) around the edge of the mounting opening (117), and the second housing (12) has a connecting boss (121) corresponding to the connecting groove (114), the connecting boss (121) being embedded in the connecting groove (114).

8. The impeller pump according to claim 7, characterized in that, The connecting groove (114) is wedge-shaped, and the connecting boss (121) is a corresponding wedge shape.

9. The impeller pump according to any one of claims 4-6, characterized in that, The first housing (11) and / or the second housing (12) are provided with a waterproof groove (115) surrounding the mounting opening (117). A waterproof ring is installed in the waterproof groove (115), and the two sides of the waterproof ring abut against the first housing (11) and the second housing (12) respectively to form a waterproof barrier.

10. The impeller pump according to claim 3, characterized in that, The first base plate (111) is provided with a coupling hole (1111), and the drive shaft (31) of the motor (3) extends through the coupling hole (1111) to the pump chamber (15) to connect the impeller (2).

11. The impeller pump according to claim 10, characterized in that, The drive shaft (31) includes a rotating shaft (311), a connecting member (312), and a sealing ring (313). The sealing ring (313) is sleeved on the rotating shaft (311). The connecting member (312) is fixedly connected to the end of the rotating shaft (311). The connecting member (312) extends into the pump chamber (15) to connect to the impeller (2). The sealing ring (313) is in close contact with the wall of the connecting hole (1111) to form a seal.

12. The impeller pump according to claim 10, characterized in that, A threaded connection hole (116) is provided on one side of the first housing (11) that is connected to the second housing (12). A positioning hole (122) is provided on the second housing (12). A connecting screw passes through the positioning hole (122) and is screwed to the threaded connection hole (116) to fix the second housing (12) to the first housing (11).

13. The impeller pump according to claim 10, characterized in that, The motor (3) includes a motor housing (31) and a connecting plate (33) fixed on the motor housing (31). The connecting plate (33) is fitted to the first base plate (111). The pump housing (1) is provided with a first connecting hole (16), and the connecting plate (33) is provided with a second connecting hole (331). The bolt assembly passes through the first connecting hole (16) and the second connecting hole (331) to lock the motor (3) to one side of the pump housing (1).

14. A spraying system, characterized in that, It includes a medicine tank, a spray plate, and an impeller pump as described in any one of claims 1-13, wherein the inlet connector (13) of the impeller pump is connected to the medicine tank via a first pipe, and the outlet connector (14) of the impeller pump is connected to the spray plate via a second pipe.

15. A plant protection device, characterized in that, Includes a vehicle and a spraying system as described in claim 14 mounted on the vehicle.

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