Liquid supply devices, spraying systems and unmanned equipment

Abstract

The utility model relates to the technical field of unmanned equipment, and specifically, to a liquid supply device, a spraying system and unmanned equipment; the liquid supply device comprises a pump body, a pump cover and a flexible impeller, the pump body is provided with an inner cavity and a liquid outlet and a liquid inlet communicated with the inner cavity; the impeller is rotatably arranged in the inner cavity, and when the impeller rotates, the liquid can be pumped in from the liquid inlet and pumped out from the liquid outlet; the pump cover is connected to the pump body to cover the opening of the inner cavity; wherein the pump cover is provided with a first inclined surface, and the top of the cavity wall of the inner cavity is provided with a second inclined surface, and the first inclined surface abuts against the second inclined surface to seal the gap between the pump cover and the top of the cavity wall of the inner cavity. The liquid supply device can seal the gap between the pump cover and the top of the cavity wall of the inner cavity to improve the problem of liquid leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned equipment, in particular to a liquid supply device, a spraying system and unmanned equipment. Background Art

[0002] Unmanned equipment can be used in agriculture, fire fighting and other fields, and when using unmanned equipment for related operations, it is necessary to carry various operating systems on the unmanned equipment body, such as spraying systems, sowing systems, etc. Among them, the spraying system can be used to spray water, liquid pesticides, etc.

[0003] The spraying system usually includes a liquid storage tank, a nozzle and a liquid supply device. The liquid storage tank is used to store liquid. The nozzle is connected to the liquid storage tank through the liquid supply device so that the liquid stored in the liquid storage tank is pumped to the nozzle for spraying through the liquid supply device; the liquid supply device includes a pump body and an impeller. The pump body is provided with an inner cavity and a liquid inlet and a liquid outlet connected to the inner cavity. The liquid inlet is connected to the liquid storage tank, and the liquid outlet is connected to the nozzle.

[0004] However, the liquid supply device provided in the related art has a gap between the pump cover and the top of the inner cavity wall of the pump body, which is prone to leakage. Utility Model Content

[0005] The utility model aims to provide a liquid supply device, a spraying system and unmanned equipment. The liquid supply device can seal the gap between a pump cover and the top of a cavity wall of an inner cavity to improve the problem of liquid leakage.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a liquid supply device, comprising:

[0008] A pump body, wherein the pump body is provided with an inner cavity and a liquid outlet and a liquid inlet communicated with the inner cavity;

[0009] a flexible impeller, the impeller being rotatably disposed in the inner cavity, and when the impeller rotates, the liquid can be pumped into the liquid inlet and out of the liquid outlet; and,

[0010] A pump cover is connected to the pump body to cover the opening of the inner cavity; wherein,

[0011] The pump cover is provided with a first inclined surface, and the top of the cavity wall of the inner cavity is provided with a second inclined surface. The first inclined surface abuts against the second inclined surface to seal the gap between the pump cover and the top of the cavity wall of the inner cavity.

[0012] In an optional embodiment, the pump cover includes a cover body and a protrusion connected to the end surface of the cover body, the outer periphery of the protrusion is provided with a first inclined surface, and the protrusion is inserted into the opening of the inner cavity.

[0013] In an optional embodiment, the pump body is provided with a deformation groove, and the cover body is configured to push the protrusion under the action of the locking force so that the first inclined surface abuts against the second inclined surface and the deformation groove is deformed.

[0014] In an alternative embodiment, the deformation grooves are distributed around the circumference of the opening of the inner cavity.

[0015] In an optional embodiment, one side of the connection protrusion of the cover body abuts against or has a gap with the end surface of the pump body.

[0016] In an alternative embodiment, the end of the impeller abuts against the pump cover.

[0017] In an optional embodiment, the impeller includes an impeller body and a plurality of blades, wherein the plurality of blades are connected to the impeller body and are distributed at intervals around the circumference of the impeller body;

[0018] Along the extension direction of the rotation axis of the impeller, the end of each blade is connected to a first sealing rib, and the end of the impeller body is connected to a second sealing rib; the second sealing rib extends around the circumference of the impeller body, and one end of the first sealing rib is connected to the second sealing rib, and the other end of the first sealing rib extends toward the cavity wall of the inner cavity, and the first sealing rib and the second sealing rib are both against the pump cover.

[0019] In an optional embodiment, the liquid inlet is used to connect to a liquid storage tank of the unmanned equipment; and the liquid outlet is used to connect to a nozzle of the unmanned equipment.

[0020] In a second aspect, the utility model provides a spraying system, comprising:

[0021] A liquid storage tank for storing liquid;

[0022] a spray head for spraying liquid; and,

[0023] In the liquid supply device of any of the aforementioned embodiments, the liquid inlet is connected to the liquid storage tank, and the liquid outlet is connected to the nozzle.

[0024] In a third aspect, the utility model provides an unmanned equipment, comprising an unmanned equipment body and a liquid supply device as in any one of the aforementioned embodiments or a spraying system as in the aforementioned embodiments arranged on the unmanned equipment body.

[0025] The beneficial effects of the liquid supply device of the embodiment of the utility model include: the liquid supply device provided by the embodiment of the utility model includes a pump body, a pump cover and an impeller, the impeller is rotatably arranged in the inner cavity of the pump body, and the pump cover is connected to the pump body to cover the opening of the inner cavity of the pump body; wherein the pump cover is provided with a first inclined surface, and the top of the cavity wall of the inner cavity is provided with a second inclined surface, and the first inclined surface abuts against the second inclined surface to seal the gap between the pump cover and the top of the cavity wall of the inner cavity. In this way, the first inclined surface and the second inclined surface abut against each other to achieve sealing, so as to improve the problem of liquid leaking from the gap between the pump cover and the top of the cavity wall of the inner cavity.

[0026] The spraying system of the embodiment of the utility model includes all the beneficial effects of the aforementioned liquid supply device, for example, improving the problem of liquid leakage.

[0027] The unmanned equipment of the embodiment of the utility model includes all the beneficial effects of the aforementioned liquid supply device or spraying system, for example: improving the problem of liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the liquid supply device in the embodiment of the utility model;

[0030] Figure 2 It is a partial structural schematic diagram of the liquid supply device in the embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the pump cover in the embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the pump body in the embodiment of the utility model;

[0033] Figure 5 for Figure 1 Sectional view in the AA direction;

[0034] Figure 6 for Figure 5 The enlarged image of the middle VI;

[0035] Figure 7 It is a schematic diagram of the structure of the impeller in the embodiment of the utility model.

[0036] Icons: 010-liquid supply device; 100-pump body; 110-inner cavity; 111-chamber; 112-second inclined surface; 113-deformation groove; 120-liquid inlet joint; 121-liquid inlet; 130-liquid outlet joint; 131-liquid outlet; 200-pump cover; 201-gap; 210-cover body; 220-protrusion; 221-first inclined surface; 300-impeller; 310-impeller body; 320-blade; 321-connecting plate; 322-contact part; 330-first sealing rib; 331-first rib; 332-second rib; 340-second sealing rib. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "vertical", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] This embodiment provides an unmanned equipment, which includes an unmanned equipment body and a spraying system installed on the unmanned equipment body; the unmanned equipment body can carry the spraying system and move synchronously, and the spraying system can be used to spray liquid materials such as water and liquid pesticides.

[0043] The unmanned equipment body of this embodiment is a drone; of course, in other embodiments, the unmanned equipment body may also refer to an unmanned vehicle, a robot, etc., which is not specifically limited here.

[0044] It should be noted that the structure and working principle of the unmanned equipment body are similar to those of related technologies and will not be repeated here.

[0045] The spraying system includes a liquid storage tank, a spray head and a liquid supply device 010 (such as Figure 1 and Figure 2 As shown), the liquid storage tank is used to store the liquid to be sprayed, the nozzle is connected to the liquid storage tank through the liquid supply device 010, and the nozzle is used to spray the liquid; the liquid supply device 010 is used to pump the liquid in the liquid storage tank to the nozzle for spraying.

[0046] Optionally, the liquid supply device 010 can be connected to at least one of the liquid storage tank and the unmanned equipment body, and the connection methods include but are not limited to snap-on connection, connection with fasteners such as bolts, etc.

[0047] For further information, please refer to Figure 1 and Figure 2 The liquid supply device 010 includes a pump body 100 and a flexible impeller 300. The pump body 100 is provided with an inner cavity 110 and a liquid outlet 131 and a liquid inlet 121 connected to the inner cavity 110. The liquid inlet 121 is connected to the liquid storage tank, and the liquid outlet 131 is connected to the nozzle. The impeller 300 is rotatably arranged in the inner cavity 110. When the impeller 300 rotates, the liquid can be pumped into the liquid inlet 121 and pumped out from the liquid outlet 131. In this way, the impeller 300 can be rotated to pump the liquid in the liquid storage tank from the liquid inlet 121 into the inner cavity 110, and pumped from the liquid outlet 131 to the nozzle, so as to ensure the reliability of liquid supply.

[0048] Optionally, the pump body 100 is connected to a liquid outlet joint 130 and a liquid inlet joint 120, the liquid outlet joint 130 is provided with a liquid outlet 131, the liquid inlet joint 120 is provided with a liquid inlet 121, the liquid outlet joint 130 is connected to the nozzle, and the liquid inlet joint 120 is connected to the liquid storage tank.

[0049] The connection methods of the pump body 100 and the liquid outlet connector 130 and the liquid inlet connector 120 include but are not limited to integral molding and threaded connection.

[0050] Furthermore, the liquid supply device 010 also includes a pump cover 200, which is connected to the pump body 100 to cover the opening of the inner cavity 110; illustratively, the pump cover 200 is detachably connected to the pump body 100 to cover or open the opening of the inner cavity 110, wherein when the pump cover 200 is detached from the pump body 100 to open the opening of the inner cavity 110, it is convenient to disassemble and install the impeller 300 in the inner cavity 110, thereby ensuring the ease of loading and unloading and maintenance of the impeller 300.

[0051] The connection method between the pump cover 200 and the pump body 100 can be selected as needed. In this embodiment, the pump cover 200 is detachably connected to the pump body 100 by bolts. Of course, in other embodiments, the pump cover 200 can also be bonded, welded, or clamped to the pump body 100, which is not specifically limited here.

[0052] Optionally, see Figure 1 and Figure 2 The impeller 300 includes an impeller body 310 and a plurality of soft blades 320. The impeller body 310 is rotatably disposed in the inner cavity 110. The plurality of blades 320 are connected to the impeller body 310 and are disposed in the inner cavity 110 at intervals along the circumference of the impeller body 310 to divide the inner cavity 110 into a plurality of chambers 111, that is, the chambers 111 are formed together with the cavity wall of the inner cavity 110 and between two adjacent blades 320.

[0053] The blade 320 is flexible, and the end of the blade 320 away from the impeller body 310 can be squeezed by the cavity wall of the inner cavity 110, so that the blade 320 is bent into an arc, and the end of the blade 320 away from the impeller body 310 can be closely attached to the cavity wall of the inner cavity 110. When any chamber 111 is opposite to the liquid outlet 131, the liquid in the chamber 111 can be discharged from the liquid outlet 131; when any chamber 111 is opposite to the liquid inlet 121, the liquid in the liquid storage tank can be transported from the liquid inlet 121 to the chamber 111; when the impeller 300 rotates, the liquid temporarily stored in the chamber 111 can move synchronously with the chamber 111.

[0054] When the blades 320 rotate, two adjacent blades 320 and the cavity walls at different positions of the inner cavity 110 form a corresponding chamber 111. The volume change of the chamber 111 as the impeller 300 rotates can be configured by adjusting the contour of the cavity wall of the inner cavity 110 and / or the position of the rotation center of the impeller 300.

[0055] Optionally, the impeller 300 is eccentrically arranged in the inner cavity 110 of the pump body 100, so that when the impeller 300 rotates, the chamber 111 filled with liquid rotates to the position of the liquid outlet 131 and can squeeze the liquid to flow to the liquid outlet 131. When the chamber 111 rotates to the position of the liquid inlet 121, the liquid can be squeezed into the chamber 111, thereby enhancing the suction and pumping effects of the pump body 100.

[0056] When the blade 320 rotates, each chamber 111 will rotate to the position of the liquid inlet 121 in turn. At this time, the chamber 111 is connected to the liquid inlet 121. During the rotation process of the chamber 111 being connected to the liquid inlet 121, the volume of the chamber 111 increases as the rotation proceeds, and the pressure decreases, forming a negative pressure effect, thereby sucking the liquid into the chamber 111. The chamber 111 filled with liquid will continue to move with the rotation of the blade 320. When the chamber 111 filled with liquid rotates to the position of the liquid outlet 131, the chamber 111 is connected to the liquid outlet 131. During the rotation process of the chamber 111 being connected to the liquid outlet 131, the volume of the chamber 111 decreases as the rotation proceeds, and the pressure increases, so that the liquid is pumped out from the liquid outlet 131 to the nozzle. The continuous rotation of the impeller 300 enables the liquid in the liquid storage tank to be continuously supplied to the nozzle through the pump body 100, thereby performing large-area, large-flow spraying.

[0057] It should be noted that the impeller 300 can be driven to rotate by a motor, and the assembly method of the motor and the transmission connection method between the motor and the impeller 300 are similar to the related art and will not be repeated here.

[0058] It should also be noted that other structures and related technologies of the impeller 300 and the pump body 100 are similar and will not be described in detail here.

[0059] When the liquid supply device 010 stops supplying liquid, it is usually necessary to ensure that the spraying system does not leak. This requires that the chambers 111 need to maintain a relatively sealed state, that is, the chambers 111 and 111 need not be interconnected. If the chambers 111 are interconnected and not sealed, when the liquid supply device 010 stops supplying liquid, under the action of atmospheric pressure, the liquid in the pump body 100 will still flow from the liquid outlet 131 to the nozzle, causing leakage. Among them, the chamber 111 includes a top surface, a bottom surface and a side surface, the bottom surface is the bottom wall of the pump body 100, the side surface is the side walls of two adjacent blades 320 and the inner wall of the inner cavity 110, and the top surface is the pump cover 200. The top surface, the bottom surface and the side surface all need to be sealed to make the chamber 111 achieve a sealed state. The flexible blades 320 can abut against the inner wall of the inner cavity 110 to form a side seal, the blades 320 abut against the bottom wall of the pump body 100 to form a bottom seal, and the blades 320 abut against the pump cover 200 to form a certain top surface seal. However, the liquid supply device 010 provided by the related art is difficult to ensure the sealing between the pump cover 200 and the top of the inner cavity 110 of the pump body 100, that is, there is a gap 201 (such as Figure 2 As shown), the adjacent chambers 111 are connected through the gap 201, that is, the top surface of the chamber 111 is not completely sealed, making it difficult to achieve a sealed and watertight effect.

[0060] To improve the above problems, please refer to Figure 3 The pump cover 200 of this embodiment is provided with a first inclined surface 221, please refer to Figure 4 The top of the cavity wall of the inner cavity 110 of the pump body 100 is provided with a second inclined surface 112, please refer to Figure 5 and Figure 6 The first inclined surface 221 abuts against the second inclined surface 112 to seal the gap 201 between the pump cover 200 and the top of the cavity wall of the inner cavity 110. The first inclined surface 221 and the second inclined surface 112 abut against each other to achieve sealing, which can improve the problem of liquid leaking from the gap 201 between the pump cover 200 and the top of the cavity wall of the inner cavity 110.

[0061] Furthermore, the first bevel 221 and the second bevel 112 are both distributed around the rotation axis of the impeller 300, wherein the second bevel 112 is distributed around the outer circumference of the opening of the inner cavity 110; thus, a good sealing effect of the pump body 100 in the circumferential direction can be ensured.

[0062] Optionally, the pump body 100 and the pump cover 200 are both made of hard materials, such as hard plastic, and the first bevel 221 and the second bevel 112 are both hard surfaces. By abutting the first bevel 221 against the second bevel 112, a hard-to-hard sealing method can be formed to ensure a good sealing effect.

[0063] The structure of the pump cover 200 can be set as required; please refer to Figure 3 , Figure 5 and Figure 6 In this embodiment, the pump cover 200 includes a cover body 210 and a protrusion 220 connected to the end surface of the cover body 210. The cover body 210 is connected to the pump body 100. The outer periphery of the protrusion 220 is provided with a first inclined surface 221, and the protrusion 220 is inserted into the opening of the inner cavity 110. Such a configuration can ensure the stability of the pump cover 200 assembled on the pump body 100, and thus further improve the reliability of the mutual abutment between the first inclined surface 221 and the second inclined surface 112, thereby ensuring the reliability of the seal.

[0064] The connection method between the protrusion 220 and the cover body 210 can be selected as needed, for example: integral molding, threaded connection, bonding, welding, etc., which is not specifically limited here.

[0065] For further information, please refer to Figure 4 and Figure 6 The pump body 100 is provided with a deformation groove 113. Under the action of the locking force, the cover body 210 can push the protrusion 220 to make the first inclined surface 221 abut against the second inclined surface 112, and deform the deformation groove 113. By setting the deformation groove 113, when the pump cover 200 is pressed against the pump body 100, the pump body 100 can be deformed to a certain extent, so that the first inclined surface 221 abuts against the second inclined surface 112 more closely, ensuring a good sealing effect.

[0066] Furthermore, the deformation grooves 113 are distributed around the outer circumference of the opening of the inner cavity 110. With such a configuration, the pump body 100 can have a relatively large deformation amount under the extrusion of the pump cover 200, thereby ensuring that the first inclined surface 221 can be more tightly against the second inclined surface 112, and can ensure that a closed annular seal is formed at the opening of the inner cavity 110, ensuring a better sealing effect, and effectively improving the problem of liquid leakage of the liquid supply device 010.

[0067] Optionally, the first bevel 221 and the second bevel 112 are inclined at the same angle relative to the rotation axis of the impeller 300, and the specific angle can be selected as needed, for example: 30-80° (including but not limited to 30°, 45°, 50°, 60°, 80°), etc., which is not specifically limited here.

[0068] Please refer to Figure 6 In this embodiment, one side of the cover body 210 connected to the protrusion 220 can abut against the end surface of the pump body 100 ( Figure 6The cover body 210 shown in the figure has not yet been abutted against the end face of the pump body 100 under the action of the locking force); specifically, under the action of the tightening force of the bolts connecting the cover body 210 to the pump body 100, the side of the cover body 210 connected with the protrusion 220 abuts against the end face of the pump body 100 provided with the deformation groove 113. Such a configuration can further improve the sealing effect between the pump cover 200 and the pump body 100, and improve the problem of liquid leakage between the pump cover 200 and the pump body 100.

[0069] Of course, in other embodiments, the side of the cover body 210 connected to the protrusion 220 can also be distributed with a gap between the end surface of the pump body 100 .

[0070] It should be noted that the liquid supply device 010 of this embodiment achieves a sealing effect by improving the structure of the cooperation between the pump cover 200 and the pump body 100. Compared with setting an electric control valve at the liquid outlet connector 130, the electric control valve can be used to control the leakage problem when the liquid supply device 010 stops supplying liquid. This can effectively reduce costs and simplify the electric control mode of the electric control module of the unmanned equipment.

[0071] Please refer to Figure 5 In order to ensure the sealing of the chamber 111 between two adjacent blades 320 , the axial end of the impeller 300 is configured to abut against the pump cover 200 .

[0072] For further information, please refer to Figure 7 , along the extension direction of the rotation axis of the impeller 300, the end of each blade 320 is connected to a first sealing rib 330, the end of the impeller body 310 is connected to a second sealing rib 340, the second sealing rib 340 extends around the circumference of the impeller body 310, and one end of the first sealing rib 330 is connected to the second sealing rib 340, the other end of the first sealing rib 330 extends toward the cavity wall of the inner cavity 110, and the first sealing rib 330 and the second sealing rib 340 are both against the pump cover 200; specifically, the first sealing rib 330 and the second sealing rib 340 are both against the end surface of the protrusion 220, when the impeller 300 rotates around its own rotation axis, the first sealing rib 330 and the second sealing rib 340 are both slid on the surface of the protrusion 220. By setting the first sealing rib 330 and the second sealing rib 340, the sealing performance of each chamber 111 can be ensured, and the problem of liquid leakage of the liquid supply device 010 can be effectively improved.

[0073] Optionally, the orthographic projection area of ​​the first sealing rib 330 on the set plane is smaller than the orthographic projection area of ​​the blade 320 on the set plane, wherein the set plane is perpendicular to the rotation axis of the impeller 300. Such an arrangement can reduce the contact area between the impeller 300 and the pump cover 200, reduce the resistance to the rotation of the impeller 300, and ensure that the impeller 300 rotates more smoothly, thereby ensuring the reliability of the liquid supply device 010 in pumping in and out the liquid.

[0074] Optionally, the shape of the first sealing rib 330 is adapted to the shape of the blade 320. The blade 320 includes a flexible connecting plate 321 and a contact portion 322 connected to one end of the connecting plate 321. The end of the connecting plate 321 away from the contact portion 322 is connected to the impeller body 310. The contact portion 322 can slide on the cavity wall of the inner cavity 110 and can be squeezed by the cavity wall of the inner cavity 110 so that the connecting plate 321 is bent and deformed. In order to improve the smoothness of the sliding of the contact portion 322 relative to the cavity wall of the inner cavity 110, the outer wall surface of the contact portion 322 is a circular arc convex surface, that is, the surface of the contact portion 322 in contact with the cavity wall of the inner cavity 110 is a circular arc convex surface. 2 is roughly in a "D" shape; the first sealing rib 330 includes a first rib 331 and a second rib 332, one end of the first rib 331 is connected to the second sealing rib 340, and the other end of the first rib 331 is connected to the second rib 332, the first rib 331 is located at the end of the connecting plate 321, and the second rib 332 is distributed around the periphery of the contact portion 322 at the end of the contact portion 322, that is, the second rib 332 is roughly in a "D" shape, and the first rib 331 and the second rib 332 both abut against the end surface of the protrusion 220 and can slide on the end surface of the protrusion 220. Such a configuration ensures the sealing effect of the chamber 111.

[0075] Optionally, the orthographic projection area of ​​the second sealing rib 340 on the set plane is smaller than the orthographic projection area of ​​the impeller body 310 on the set plane. This arrangement can further reduce the contact area between the impeller 300 and the pump cover 200, further reduce the resistance to the rotation of the impeller 300, ensure the smooth rotation of the impeller 300, and further ensure the reliability of the liquid supply device 010 in pumping in and out the liquid.

[0076] The unmanned equipment of this embodiment can use the spraying system to spray liquid materials such as water and liquid pesticides. During the spraying process, the liquid in the liquid storage tank is pumped into the pump body 100 by the rotation of the impeller 300, and the liquid entering the pump body 100 is pumped from the liquid outlet 131 to the nozzle through the impeller 300, so that the nozzle can be used to spray the liquid.

[0077] In summary, the liquid supply device 010 of the utility model can be used in spraying systems and unmanned equipment, and the liquid supply device 010 can seal the gap 201 between the pump cover 200 and the top of the cavity wall of the inner cavity 110 to improve the problem of liquid leakage.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid supply device, characterized in that: include: A pump body (100), wherein the pump body (100) is provided with an inner cavity (110) and a liquid outlet (131) and a liquid inlet (121) communicated with the inner cavity (110); a flexible impeller (300), the impeller (300) being rotatably disposed in the inner cavity (110), and when the impeller (300) rotates, the liquid can be pumped into the liquid inlet (121) and the liquid can be pumped out from the liquid outlet (131); and, A pump cover (200), the pump cover (200) being connected to the pump body (100) so as to cover the opening of the inner cavity (110); wherein: The pump cover (200) is provided with a first inclined surface (221), and the top of the cavity wall of the inner cavity (110) is provided with a second inclined surface (112), and the first inclined surface (221) abuts against the second inclined surface (112) to seal the gap between the pump cover (200) and the top of the cavity wall of the inner cavity (110).

2. The liquid supply device according to claim 1, characterized in that: The pump cover (200) comprises a cover body (210) and a protrusion (220) connected to the end surface of the cover body (210), the outer periphery of the protrusion (220) is provided with the first inclined surface (221), and the protrusion (220) is inserted into the opening of the inner cavity (110).

3. The liquid supply device according to claim 2, characterized in that: The pump body (100) is provided with a deformation groove (113), and the cover body (210) is configured to push the protrusion (220) under the action of a locking force so that the first inclined surface (221) abuts against the second inclined surface (112) and causes the deformation groove (113) to deform.

4. The liquid supply device according to claim 3, characterized in that: The deformation grooves (113) are distributed around the periphery of the opening of the inner cavity (110).

5. The liquid supply device according to claim 2, characterized in that: One side of the cover body (210) connected to the protrusion (220) is in abutment with or spaced from the end surface of the pump body (100).

6. The liquid supply device according to claim 1, characterized in that: An end of the impeller (300) abuts against the pump cover (200).

7. The liquid supply device according to claim 6, characterized in that: The impeller (300) comprises an impeller body (310) and a plurality of blades (320), wherein the plurality of blades (320) are all connected to the impeller body (310) and are distributed at intervals in the circumferential direction of the impeller body (310); Along the extension direction of the rotation axis of the impeller (300), the end of each blade (320) is connected to a first sealing rib (330), and the end of the impeller body (310) is connected to a second sealing rib (340); the second sealing rib (340) extends around the circumference of the impeller body (310), and one end of the first sealing rib (330) is connected to the second sealing rib (340), and the other end of the first sealing rib (330) extends toward the cavity wall of the inner cavity (110), and the first sealing rib (330) and the second sealing rib (340) are both in contact with the pump cover (200).

8. The liquid supply device according to claim 1, characterized in that: The liquid inlet (121) is used to be connected to a liquid storage tank of the unmanned equipment; and the liquid outlet (131) is used to be connected to a nozzle of the unmanned equipment.

9. A spraying system, characterized in that: include: A liquid storage tank for storing liquid; A spray head for spraying liquid; as well as, In the liquid supply device according to any one of claims 1 to 8, the liquid inlet (121) is connected to the liquid storage tank, and the liquid outlet (131) is connected to the nozzle.

10. An unmanned device, characterized in that: It comprises an unmanned equipment body and a liquid supply device as described in any one of claims 1 to 8 or a spraying system as described in claim 9, which is arranged on the unmanned equipment body.

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