Valve, spraying device and unmanned equipment

Abstract

The embodiment of the utility model provides a valve, a spraying device and unmanned equipment, and relates to the technical field of valves. The valve comprises a valve body, a valve element, a first sealing piece and a reset piece, the valve body comprises a water inlet end and a water outlet end, a valve cavity is formed in the valve body, the valve element comprises a valve element head and a valve element tail, the valve element head is arranged towards the water inlet end, the valve element tail is arranged towards the water outlet end, and the first sealing piece is arranged between the valve element and the valve body and used for sealing the valve element and the valve body. The reset piece is arranged in the valve cavity and used for driving the valve element to move in the valve cavity and driving the first sealing piece to move in the valve cavity so as to conduct and seal the valve body, an impurity channel is formed in the head of the valve element, and / or an impurity channel is formed in the tail of the valve element. By means of the impurity channel, particle impurities such as silt entering the valve body can flow out of the water outlet end after smoothly passing through the impurity channel, and the situation that the valve element is clamped, the reset piece cannot reset, and sealing of the valve fails is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and in particular, to a valve, a spraying device and an unmanned device. Background Art

[0002] A valve is a component in a fluid delivery system. When common valves such as a check valve and a drip-proof valve are applied to a transmission system, when the fluid pressure acting on the valve core is large, the valve core of the valve will open so that the valve inlet is communicated with the valve outlet, and the fluid can flow from the valve inlet to the valve outlet; when the fluid pressure acting on the valve core is small, the valve core of the valve will move and close under the action of a restoring force such as an elastic force and a self-gravity force to prevent the fluid from flowing to the valve outlet.

[0003] In the prior art, since sediment is likely to remain in the valve, the valve core may be stuck, the spring cannot be reset, and the valve seal fails. Summary of the Utility Model

[0004] The utility model provides a valve, a spraying device and an unmanned device, which can avoid the valve core from being stuck and the valve seal from failing.

[0005] Embodiments of the utility model can be implemented as follows:

[0006] In a first aspect, the utility model provides a valve, comprising:

[0007] A valve body, the valve body comprising a water inlet end and a water outlet end, and a valve cavity being formed inside the valve body;

[0008] A valve core, the valve core comprising a valve core head and a valve core tail, the valve core head facing the water inlet end; the valve core tail facing the water outlet end;

[0009] A first sealing member, disposed between the valve core and the valve body, for sealing between the valve core and the valve body;

[0010] A restoring member, the restoring member being disposed in the valve cavity, one end of the restoring member being connected to the valve core and the other end being connected to the valve body; the restoring member is used for driving the valve core to move in the valve cavity and driving the first sealing member to move in the valve cavity so as to conduct and seal the valve body;

[0011] An impurity channel is formed in the valve core head; and / or, an impurity channel is formed in the valve core tail.

[0012] In an optional embodiment, the valve body has a limit guiding hole, the limit guiding hole is located in the valve cavity, and the valve core tail is movably fitted in the limit guiding hole.

[0013] In an alternative embodiment, the tail of the valve core is in clearance fit or sliding fit with the limit guiding hole.

[0014] In an alternative embodiment, the tail of the valve core includes a plurality of connected tail structural members, and the plurality of tail structural members are distributed around the axis of the tail of the valve core. An impurity channel formed by the tail of the valve core is defined between adjacent tails of the valve core; and / or,

[0015] The head of the valve core includes a plurality of connected head structural members, and the plurality of head structural members are distributed around the axis of the head of the valve core. An impurity channel formed by the head of the valve core is defined between adjacent heads of the valve core.

[0016] In an alternative embodiment, the impurity channel extends in the direction from the head of the valve core to the tail of the valve core; and / or,

[0017] The reset member is an elastic reset member.

[0018] In an alternative embodiment, the valve core is provided with a sealing ring mounting groove, and the first sealing member is arranged in the sealing ring mounting groove. The sealing ring mounting groove is located between the head and the tail of the valve core.

[0019] In an alternative embodiment, the valve has a conducting state and a sealing state. In the sealing state, the first sealing member arranged in the sealing ring mounting groove is in close contact with the inner wall of the valve body to seal the valve cavity.

[0020] In an alternative embodiment, a head guiding channel is formed at the water inlet end; in the sealing state, the sealing ring mounting groove is located at the transition position between the head guiding channel and the valve cavity, and the first sealing member is in close contact with the inner wall of the valve body to prevent liquid from entering the valve cavity from the head guiding channel.

[0021] In an alternative embodiment, a head guiding channel is formed at the water inlet end, the head guiding channel is communicated with the valve cavity, and a part of the head of the valve core is movably fitted in the head guiding channel.

[0022] In an alternative embodiment, the head of the valve core is in clearance fit or sliding fit with the head guiding channel;

[0023] and / or, the length of the head of the valve core in the axial direction of the head guiding channel is less than the length of the head guiding channel.

[0024] In an alternative embodiment, the valve body includes a first assembly and a second assembly. The first assembly includes a first connecting portion, and the second assembly includes a second connecting portion. The first assembly and the second assembly are connected through the first connecting portion and the second connecting portion, and a second sealing member is provided between the first connecting portion and the second connecting portion.

[0025] In an alternative embodiment, the valve body has a limiting hole column located in the valve cavity. The limiting hole column defines a limiting guiding hole, and the tail of the valve core is movably fitted in the limiting guiding hole;

[0026] Wherein, the reset member is sleeved on the outer periphery of the limiting hole column.

[0027] In a second aspect, the present utility model provides a spraying device, including the valve according to any one of the foregoing embodiments.

[0028] In a third aspect, the present utility model provides an unmanned device, including the spraying device according to the foregoing embodiment.

[0029] The beneficial effects of the valve, the spraying device and the unmanned device according to the embodiments of the present utility model include, for example:

[0030] The present utility model provides a valve, which includes a valve body, a valve core, a first sealing member and a reset member. The valve body includes a water inlet end and a water outlet end. A valve cavity is formed in the valve body. The valve core includes a valve core head and a valve core tail. The valve core head faces the water inlet end, and the valve core tail faces the water outlet end. The first sealing member is arranged between the valve core and the valve body for sealing between the valve core and the valve body. The reset member is arranged in the valve cavity. One end of the reset member is connected to the valve core, and the other end is connected to the valve body. The reset member is used to drive the valve core to move in the valve cavity and drive the first sealing member to move in the valve cavity to conduct and seal the valve body. The valve core head is formed with an impurity channel, and / or the valve core tail is formed with an impurity channel. This impurity channel can enable sediment and other particulate impurities entering the valve body to smoothly pass through the impurity channel and then flow out of the water outlet end, avoiding the situation that the valve core is stuck, resulting in the failure of the reset member to reset and the sealing failure of the valve.

[0031] The present utility model provides a spraying device, which includes the above-mentioned valve, and the spraying device has all the functions of the above-mentioned valve.

[0032] The present utility model provides an unmanned device, which includes the above-mentioned spraying device, and the unmanned device has all the functions of the above-mentioned spraying device. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0034] Figure 1 Schematic diagram of the first perspective of the valve provided in the embodiment of the present utility model;

[0035] Figure 2 Exploded view of the valve provided in the embodiment of the present utility model;

[0036] Figure 3 Cross-sectional view of the valve provided in the embodiment of the present utility model in the sealed state;

[0037] Figure 4 Cross-sectional view of the valve provided in the embodiment of the present utility model in the conducting state;

[0038] Figure 5 Schematic diagram of the second perspective of the valve provided in the embodiment of the present utility model;

[0039] Figure 6 Schematic diagram of the third perspective of the valve provided in the embodiment of the present utility model;

[0040] Figure 7 Partial structural schematic diagram of the valve core provided in the embodiment of the present utility model;

[0041] Figure 8 Schematic diagram of the valve core cooperating with the second assembly provided in the embodiment of the present utility model;

[0042] Figure 9 Schematic diagram of the valve core cooperating with the first assembly provided in the embodiment of the present utility model.

[0043] Icons: 100 - valve body; 110 - first assembly; 120 - second assembly; 130 - second seal; 140 - limit hole column; 101 - valve cavity; 102 - limit guiding hole; 103 - first inlet; 104 - first outlet; 105 - head guiding channel; 200 - valve core; 201 - seal ring installation groove; 210 - valve core tail; 211 - tail structural member; 2101 - first impurity channel; 220 - valve core head; 221 - head structural member; 2201 - second impurity channel; 300 - reset member; 400 - first seal. Detailed implementation manners

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model.

[0048] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0049] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0050] As mentioned in the background art, valves are components in fluid transportation systems. Common valves such as stop valves and drip-proof valves are used in transmission systems.

[0051] When the fluid pressure acting on the valve core is large, the valve core of the valve will open to connect the valve inlet and the valve outlet, and the fluid can flow from the valve inlet to the valve outlet; when the fluid pressure acting on the valve core is small, the valve core of the valve will move and close under the action of restoring forces such as elastic force and self-gravity to prevent the fluid from flowing to the valve outlet.

[0052] In the prior art, due to the easy residual sediment in the valve, the valve core is stuck, the spring cannot be reset, and the valve seal fails. For example, sediment is likely to remain between the guide post of the valve core and the inner wall of the limit hole, resulting in the valve core being stuck, the spring unable to reset, and the valve seal failing.

[0053] For example, when the valve type is a drip-proof valve, if the liquid passing through the valve contains sediment or other fine particles, sediment is likely to remain in the gap between the guide post (the guide post is a cylindrical structure) of the valve core and the inner side wall of the limit hole, resulting in the valve core being stuck, the spring unable to reset, and the valve seal failing.

[0054] In addition, the guide post of the valve core and the limit hole are in clearance fit. During the up and down movement of the valve core, the spring will be bent to a certain extent after being compressed. Due to a certain lateral force, or when the valve body 100 is in an inclined or horizontal state, or even some unbalanced factors caused by the liquid flowing through the valve core to its side, the valve core will swing left and right during the spring reset process. Since there is no guiding structure at the top of the valve core, the valve core is prone to large tilts, and it is also easy for the sealing ring of the valve core not to be correctly pressed on the sealing surface inside the valve body, that is, the valve core cannot be positively pressed on the sealing surface inside the valve body, and thus a gap is generated and the seal fails.

[0055] In view of this, please refer to Figures 1-9 , the valve, spraying device and unmanned device provided in the embodiments of the present utility model can solve this problem, and will be described in detail below.

[0056] An unmanned device is provided in the embodiments of the present utility model. The unmanned device can be, but is not limited to, an unmanned aerial vehicle or an unmanned vehicle. The unmanned device includes a spraying device that can spray liquids such as pesticides and nutrient solutions outward to replace manual spraying and improve the operation efficiency.

[0057] Specifically, the spraying device includes a valve. The spraying device includes a plurality of connecting pipes to achieve the connection between various mechanisms in the liquid transmission system. Setting the valve of the present application in any connecting pipe can improve the operation effect. The connecting pipe can be an inlet pipe, an outlet pipe, etc.

[0058] Please refer to Figure 1 and Figure 2 , the valve includes a valve body 100, a valve core 200, a first seal 400 and a reset member 300. The valve body 100 includes a water inlet end and a water outlet end. A valve cavity 101 is formed inside the valve body 100. The valve core 200 includes a valve core head 220 and a valve core tail 210. The valve core head 220 faces the water inlet end, and the valve core tail 210 faces the water outlet end. The first seal 400 is arranged between the valve core 200 and the valve body 100 to seal between the valve core 200 and the valve body 100.

[0059] The reset member 300 is disposed in the valve cavity 101. One end of the reset member 300 is connected to the valve core 200, and the other end is connected to the valve body 100. The reset member 300 is used to drive the valve core 200 to move in the valve cavity 101 and drive the first seal 400 to move in the valve cavity 101 to conduct and seal the valve body 100. An impurity channel is formed in the valve core head 220, and / or an impurity channel is formed in the valve core tail 210.

[0060] Wherein, in this embodiment, the impurity channel extends in the direction from the valve core head 220 to the valve core tail 210, so that impurities can move from the water inlet end to the water outlet end to discharge the valve body 100.

[0061] The working principle of the valve in this solution is as follows: When there is liquid flowing towards the valve and entering from the water inlet end, the impact force generated by the liquid is greater than the reset force generated by the reset member, pushing the valve core 200 to move in the valve body 100 in the direction away from the water inlet end, causing the first seal 400 to move with the valve core 200. As a result, the first seal 400 is separated from the inner wall of the valve body 100, enabling the valve body to conduct and allowing the liquid to flow into the valve cavity 101 and out from the water outlet end; When there is no impact force generated by the liquid, or the impact force is very small, the reset force generated by the reset member 300 acts on the valve core 200, causing the valve core 200 to move towards the water inlet end, and the first seal 400 moves with the valve core 200, so that the first seal 400 can seal between the valve core 200 and the valve body 100.

[0062] This impurity channel allows particulate impurities such as sediment entering the valve body 100 to smoothly pass through the impurity channel and then flow out of the water outlet end, avoiding the situation where the valve core 200 is stuck, resulting in the inability of the reset member 300 to reset and the valve seal failure.

[0063] It should be noted that, for the convenience of installing the first seal 400 (which can be understood as a sealing ring), a sealing ring groove is formed in the middle of the valve core 200. The first seal 400 is disposed in the sealing ring installation groove 201. The sealing ring installation groove 201 is located between the valve core head 220 and the valve core tail 210. During the movement of the valve core 200, the first seal 400 can be driven to move.

[0064] It should be noted that the valve has a conducting state and a sealing state. In the sealing state, the first seal 400 disposed in the sealing ring installation groove 201 is in close contact with the inner wall of the valve body 100 to seal the valve cavity 101.

[0065] When there is a water flow impacting the valve, under the water flow impact force, the reset member 300 deforms in the direction of the water outlet end, and the valve core 200 moves in the direction of the water outlet end, causing the first seal 400 to be separated from the inner wall of the valve body 100, and the valve enters the conducting state.

[0066] In this embodiment, an impurity channel is formed on the valve core head 220 , and at the same time, an impurity channel is formed on the valve core tail 210 . For the convenience of description, the impurity channel formed on the valve core head 220 is the first impurity channel 2101 , and the impurity channel formed on the valve core tail 210 is the second impurity channel 2201 .

[0067] Specifically, in order to prevent the valve core 200 from swinging and affecting the sealing contact between the first sealing member 400 and the valve body 100 as much as possible, the valve body 100 has a limiting guide hole 102, which is located in the valve cavity 101, and the valve core tail 210 can be movably matched with the limiting guide hole 102.

[0068] In this embodiment, the water inlet and the water outlet are respectively provided with a first inlet 103 and a first outlet 104. When the valve is in the on state, the first inlet 103, the valve cavity 101 and the first outlet 104 can be connected in sequence.

[0069] The valve core tail portion 210 is used to make the first sealing member 400 closely contact with the inner wall of the valve body 100 to achieve sealing when moving relative to the limiting guide hole 102, so as to block the communication state between the first inlet 103 and the first outlet 104.

[0070] Alternatively, the first sealing member 400 is separated from the valve body 100 to connect the first inlet 103 and the first outlet 104. The first impurity channel 2101 allows granular impurities such as mud and sand that enter the valve body 100 to pass smoothly through the area between the inner wall of the limiting guide hole 102 and the tail 210 of the valve core, thereby avoiding the valve core 200 from being stuck, resulting in the reset member 300 being unable to reset and causing the valve seal to fail.

[0071] That is, mud or other fine particles can easily enter from the second inlet of the first impurity channel 2101 and then flow out from the second outlet of the first impurity channel 2101 to the valve chamber 101 without causing the valve core 200 to be stuck.

[0072] In this embodiment, the valve can be understood as an anti-drip valve. When the valve is in the sealing position, the valve core 200 prevents the liquid from flowing from the first inlet 103 to the first outlet 104, so that the valve can be used as an anti-drip valve.

[0073] In other embodiments, the valve may also be understood as a leak-proof valve, a stop valve, a check valve, a one-way valve, etc.

[0074] The valve can be used in liquid transmission pipelines or gas transmission pipelines. When the valve is an anti-drip valve or an anti-leak valve, it can be used in liquid transmission pipelines to prevent residual liquid in the pipe from dripping or leaking from the outlet of the transmission pipeline when the liquid flow in the transmission pipeline is small, thereby avoiding pollution or waste.

[0075] Specifically, in this embodiment, the valve body 100 includes a first assembly 110 and a second assembly 120. The first assembly 110 includes a first connecting portion, and the second assembly 120 includes a second connecting portion. The first assembly 110 and the second assembly 120 are connected through the first connecting portion and the second connecting portion, and a second sealing member 130 (which can be understood as a sealing ring) is provided between the first connecting portion and the second connecting portion.

[0076] Specifically, the first connecting portion and the second connecting portion can be connected together by a threaded connection. The first assembly 110 has an inlet end, and the second assembly 120 has an outlet end and a limiting and guiding hole 102.

[0077] That is to say, the limiting and guiding hole 102 is located in the second assembly 120. The first assembly 110 and the second assembly 120 jointly define a valve cavity 101. The second sealing member 130 can simultaneously abut against the first connecting portion and the second connecting portion, ensuring that there are no other communication ports with the outside except the first inlet 103 and the first outlet 104 of the valve, thereby improving the sealing effect of the valve.

[0078] It should be noted that in this embodiment, an elastic member is used as the reset member 300. The elastic member is disposed between the valve core 200 and the valve body 100, and the elastic force of the elastic member is the reset force.

[0079] In other embodiments, the reset force can be provided by the self - gravity of the valve core 200. At this time, the reset member 300 is the valve core 200 itself.

[0080] It should be noted that the valve body 100 has a limiting hole column 140 located in the valve cavity 101. The limiting hole column 140 defines the limiting and guiding hole 102. Among them, the elastic member is a spring. One end of the spring is fixed or abutted against one end of the valve core 200 close to the outlet, and the other end of the spring is fixed or abutted against the valve body 100.

[0081] In this embodiment, the other end of the spring is sleeved on the outer periphery of the limiting hole column 140, and the other end of the spring is relatively fixed to the limiting column.

[0082] It should be noted that when the valve is in the sealed state, the first sealing member 400 is used for sealing and mating with the sealing surface inside the valve. When the valve is in the conducting state, a gap is generated between the first sealing member 400 and the sealing surface inside the valve, so that the first inlet 103, the valve cavity 101, and the first outlet 104 are connected in sequence.

[0083] Among them, please refer to Figures 6-8, the tail part 210 of the valve core is a columnar structure. The tail part 210 of the valve core includes a plurality of connected tail structural members 211. The plurality of tail structural members 211 are distributed around the axis of the tail part 210 of the valve core. A first impurity channel 2101 is defined between adjacent tail structural members 211. The tail structural member 211 can be, for example, a plate structure.

[0084] The plurality here can be understood as at least two. For example, the number of the tail structural members 211 can be two, three, four, five, etc.

[0085] In this embodiment, the number of the tail structural members 211 is four, and adjacent tail structural members 211 are connected at right angles. That is to say, the tail structural members 211 form a cross-shaped framework structure.

[0086] In addition, in order to minimize the attenuation of the liquid flow rate when the valve is in the conducting state as much as possible, and at the same time, minimize the moving resistance of the valve core 200 when the valve is in the conducting state as much as possible, the tail part 210 of the valve core and the limit guiding hole 102 can be in clearance fit.

[0087] That is to say, there can be a certain gap between the tail structural member 211 and the limit guiding hole 102 to facilitate the up and down movement of the tail part 210 of the valve core in the limit guiding hole 102. Of course, the tail structural member 211 can also contact the inner wall of the limit guiding hole 102, and the tail part 210 of the valve core slides relative to the limit guiding hole 102 to achieve the sliding fit between the tail part 210 of the valve core and the limit guiding hole 102. At this time, compared with the guiding column with a cylindrical structure in the prior art, the contact area between the tail part 210 of the valve core and the inner wall of the limiting member is smaller.

[0088] It should be noted that in order to facilitate the up and down movement of the valve core 200, in this embodiment, the length of the tail part 210 of the valve core in the axial direction of the tail part 210 of the valve core is greater than the length of the limit guiding hole 102. Here, the length of the limit guiding hole 102 can be understood as the length of the limit guiding hole 102 in the axial direction of the tail part 210 of the valve core.

[0089] Please refer to Figure 5 , Figure 7 and Figure 9 , in order to ensure that the valve core 200 can be correctly pressed on the sealing surface in the valve body 100 and avoid the situation of sealing failure, in this embodiment, a head guiding channel 105 is formed at the water inlet end. The head guiding channel 105 communicates with the first inlet 103 and the valve cavity 101 at the same time. A part of the head 220 of the valve core is movably fitted in the head guiding channel 105, and the head guiding channel 105 can play a guiding role for the head 220 of the valve core.

[0090] Among them, in the sealed state, the sealing ring installation groove 201 is located at the transition position between the head guiding channel 105 and the valve cavity 101. The first seal 400 is in close contact with the inner wall of the valve body 100 to prevent liquid from entering the valve cavity 101 from the head guiding channel 105.

[0091] In this embodiment, the valve core head 220 is also a columnar structure. Among them, the axis of the valve core head 220 and the axis of the valve core tail 210 are collinear.

[0092] Therefore, the valve core head 220 can be limited in the head guiding channel 105, thereby restricting the amplitude of the left - right swing of the valve core 200. No matter what degree of compression the spring is in, it can ensure that the whole valve core 200 is on the axis (which can be understood as the axis of the valve core tail 210), ensuring that after the valve core 200 is reset, it can correctly press on the sealing surface inside the valve body 100, avoiding the situation of seal failure.

[0093] It is easy to understand that the valve core head 220 in this embodiment has an impurity channel (i.e., the second impurity channel 2201), which neither affects the liquid flow rate entering the valve nor causes the valve core 200 to be stuck by impurities as much as possible.

[0094] In this embodiment, the valve core head 220 includes a plurality of connected head structural members 221. The head structural members 221 can be, for example, plate - like structures. The plurality of head structural members 221 are distributed around the axis of the valve core head 220. The second impurity channel 2201 is defined between adjacent head structural members 221. When the valve is in the conducting state, the liquid entering through the first inlet 103 can enter the valve cavity 101 through the second impurity channel 2201.

[0095] The plurality here can be understood as at least two. For example, the number of the head structural members 221 can be two, three, four, or five, etc. In this embodiment, the number of the head structural members 221 is four, and adjacent head structural members 221 are connected at right angles. That is to say, the head structural members 221 also form a cross - shaped framework structure.

[0096] In addition, it should be noted that the valve core head 220 and the head guiding channel 105 can be in clearance fit or sliding fit. In the case of clearance fit between the valve core head 220 and the head guiding channel 105, parts of the plurality of head structural members 221 of the valve core head 220 can be movably fitted in the head guiding channel 105.

[0097] There can be a certain gap between the head structural member 221 and the inner wall of the head guiding channel 105 to facilitate the up-and-down movement of the valve core head 220 in the head guiding channel 105. Of course, the head structural member 221 can also contact the inner wall of the head guiding channel 105, and the valve core head 220 slides relative to the head guiding channel 105 to achieve the sliding fit between the valve core tail 210 and the limit guiding hole 102.

[0098] In addition, in order to better limit the valve core head 220 by the head guiding channel 105 during the movement of the valve core head 220 relative to the head guiding channel 105, the length of the valve core head 220 in the axial direction of the head guiding channel 105 is less than the length of the head guiding channel 105. The length of the head guiding channel 105 can be understood as the length of the head guiding channel 105 in the axial direction of the valve core head 220.

[0099] Of course, in some embodiments, only the valve core head 220 may be formed with the second impurity channel 2201. For the structure of the valve core head 220, reference can be made to the description of the valve core head 220 above. In some embodiments, only the valve core tail 210 may be formed with the first impurity channel 2101. For the structure of the valve core tail 210, reference can be made to the description of the valve core tail 210 above, which will not be elaborated here.

[0100] According to a valve provided in this embodiment, the working principle of the valve:

[0101] Please refer to Figure 3 , when there is no water inlet at the first inlet 103 or the inlet water pressure is less than the opening pressure of the valve core 200, the first seal 400 of the valve core 200 is in close contact with the sealing surface in the valve body 100 under the elastic force of the spring, thereby preventing the liquid from passing through the first outlet 104 of the valve.

[0102] Please refer to Figure 4 , when there is liquid flowing into the first inlet 103 and the inlet water pressure is greater than the opening pressure, the spring is compressed, then the valve core 200 moves downward, and the first seal 400 is separated from the sealing surface in the valve body 100 to form a gap so that the water flow can pass through, thereby achieving the effect of connecting the pipeline.

[0103] The water flow can enter from the first inlet 103, pass through the head guiding channel 105 and the second impurity channel 2201 and the gap between the first seal 400 of the valve core 200 and the sealing surface in the valve body 100, then enter the valve cavity 101, and then flow out through the first outlet 104.

[0104] When a liquid containing sediment or other fine particles flows through the valve body 100, some particles flow through the gap between the tail 210 of the valve core and the limit guiding hole 102 (this gap can be understood as the flow channel space jointly defined by the inner walls of the first impurity channel 2101 and the limit guiding hole 102).

[0105] It should be noted that when the valve is in the sealed state, the first seal 400 is used for sealing cooperation with the sealing surface inside the valve. When the valve is in the conducting state, a gap is generated between the first seal 400 and the sealing surface inside the valve, and the first inlet 103, the valve cavity 101, and the first outlet 104 are connected in sequence.

[0106] It should be noted that during the movement of the valve core 200, the tail 210 and the head 220 of the valve core will always be limited in the limit guiding hole 102 and the head guiding channel 105 respectively, that is, both ends of the valve core 200 will always be in a limited state.

[0107] In summary, the valve includes a valve body 100, a valve core 200, a first seal 400, and a reset member 300. The valve body 100 includes a water inlet end and a water outlet end. A valve cavity 101 is formed inside the valve body 100. The valve core 200 includes a tail 210 and a head 220 of the valve core. The tail 210 of the valve core is arranged towards the water inlet end, and the head 220 of the valve core is arranged towards the water outlet end. The first seal 400 is arranged between the valve core 200 and the valve body 100 for sealing between the valve core 200 and the valve body 100. The reset member 300 is arranged in the valve cavity 101. One end of the reset member 300 is connected to the valve core 200, and the other end is connected to the valve body 100. The reset member 300 is used to drive the valve core 200 to move in the valve cavity 101 and drive the first seal 400 to move in the valve cavity 101 to conduct and seal the valve body 100. The tail 210 of the valve core forms an impurity channel, and / or the head 220 of the valve core forms an impurity channel.

[0108] This impurity channel allows sediment and other particulate impurities entering the valve body 100 to flow out of the water outlet end smoothly after passing through the impurity channel, avoiding the situation where the valve core 200 is stuck and the reset member 300 cannot be reset, resulting in valve seal failure.

[0109] In addition, the first impurity channel 2101 allows particulate impurities such as sediment entering the valve body 100 to smoothly pass through the area between the inner wall of the limit guiding hole 102 and the tail 210 of the valve core, avoiding the valve core 200 from being stuck, which may cause the resetting member 300 to fail to reset and result in valve sealing failure. At the same time, both ends of the valve core 200 (which can be understood as the tail 210 and the head 220 of the valve core) can be limited, avoiding the swaying of the valve core 200 caused by the compression and bending of the spring, the inclination or lying flat of the valve body 100, etc., ensuring that after the valve core 200 is reset, it can correctly press on the sealing surface inside the valve body 100 and avoiding the occurrence of sealing failure.

[0110] Since the tail 210 of the valve core is a cross-bone structure, compared with the guiding column with a cylindrical structure in the prior art, the contact surface with the inner wall of the limit guiding hole 102 is greatly reduced, which is equivalent to changing from surface contact to line contact. The gap between the tail 210 of the valve core and the limit guiding hole 102 also becomes larger, increasing the passing ability of fine particles and greatly reducing the situation where sediment gets stuck between the tail 210 of the valve core and the limit guiding hole 102.

[0111] A clearance fit is adopted between the tail 210 of the valve core and the limit guiding hole 102, and enough clearance must be left to enable the tail 210 of the valve core to easily move up and down axially in the limit guiding hole 102. Due to the existence of this clearance, the valve core 200 will swing left and right. The more the spring resets, the larger the possible swing angle of the valve core 200. Finally, it may cause the axis of the valve core 200 to deviate from the axis of the entire valve body 100, and the valve core 200 cannot correctly press on the sealing surface inside the valve body 100, thus generating a gap and resulting in sealing failure.

[0112] Therefore, the top of the valve core 200 in this embodiment has a valve core head 220 with a cross-bone structure, which forms a fit with the inner side wall of the head guiding channel 105, limiting its swinging amplitude within the head guiding channel 105.

[0113] Similarly, the outer diameter of the valve core head 220 is smaller than the aperture of the head guiding channel 105, ensuring that it can easily move along the axis direction of the head guiding channel 105.

[0114] The tails 210 and the heads 220 at both ends of the valve core 200 in this embodiment should be long enough to ensure that in the working state, when the valve core 200 is in the sealed state and the maximum opening state (which can be understood as the conducting state when the liquid flow rate through the valve is the largest), both ends of the valve core 200 are still in the limited state, so as to ensure that the valve core 200 always moves up and down along the axis of the valve body 100, and the sealing ring can be positively pressed on the sealing surface inside the valve body 100 every time.

[0115] The spraying device includes the above-mentioned valve, and the spraying device has all the functions of the above-mentioned valve.

[0116] The unmanned device includes the above-mentioned spraying device, and the unmanned device has all the functions of the above-mentioned spraying device.

[0117] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. A valve, characterized in that, Comprising: A valve body (100), the valve body (100) includes a water inlet end and a water outlet end, and a valve cavity (101) is formed inside the valve body (100); A valve core (200), the valve core (200) includes a valve core head (220) and a valve core tail (210), the valve core head (220) faces the water inlet end; the valve core tail (210) faces the water outlet end; A first seal (400), provided between the valve core (200) and the valve body (100) for sealing between the valve core (200) and the valve body (100); A reset member (300), the reset member (300) is disposed in the valve cavity (101), one end of the reset member (300) is connected to the valve core (200), and the other end is connected to the valve body (100); the reset member (300) is used to drive the valve core (200) to move in the valve cavity (101), and drive the first seal (400) to move in the valve cavity (101) to conduct and seal the valve body (100); The valve core head (220) is formed with an impurity channel; and / or, the valve core tail (210) is formed with an impurity channel.

2. The valve according to claim 1, wherein The valve body (100) has a limit guiding hole (102), the limit guiding hole (102) is located in the valve cavity (101), and the valve core tail (210) is movably fitted in the limit guiding hole (102).

3. The valve according to claim 2, characterized in that, The valve core tail (210) and the limit guiding hole (102) are in clearance fit or sliding fit.

4. The valve according to claim 1, characterized in that, The valve core tail (210) includes a plurality of connected tail structural members (211), and the plurality of tail structural members (211) are distributed around the axis of the valve core tail (210), and the impurity channel formed by the valve core tail (210) is defined between adjacent valve core tails (210); and / or, the valve core head (220) includes a plurality of connected head structural members (221), and the plurality of head structural members (221) are distributed around the axis of the valve core head (220), and the impurity channel formed by the valve core head (220) is defined between adjacent valve core heads (220).

5. The valve according to claim 1, characterized in that, The impurity channel extends in the direction from the valve core head (220) to the valve core tail (210); and / or, The reset member (300) is an elastic reset member.

6. The valve according to claim 1, characterized in that, The valve core (200) is provided with a seal ring installation groove (201), the first seal (400) is disposed in the seal ring installation groove (201), and the seal ring installation groove (201) is located between the valve core head (220) and the valve core tail (210).

7. The valve according to claim 6, characterized in that, The valve has a conducting state and a sealing state. In the sealing state, the first seal (400) disposed in the seal ring installation groove (201) is in close contact with the inner wall of the valve body (100) to seal the valve cavity (101).

8. The valve according to claim 7, characterized in that, Therefore, a head guiding channel (105) is formed at the water inlet end; in the sealed state, the sealing ring installation groove (201) is located at the transition position between the head guiding channel (105) and the valve cavity (101), and the first sealing member (400) is in close contact with the inner wall of the valve body (100) to prevent liquid from entering the valve cavity (101) from the head guiding channel (105).

9. The valve according to claim 1, characterized in that, Therefore, a head guiding channel (105) is formed at the water inlet end. The head guiding channel (105) communicates with the valve cavity (101), and a part of the valve core head (220) is movably fitted in the head guiding channel (105).

10. The valve according to claim 9, characterized in that, The valve core head (220) is in clearance fit or sliding fit with the head guiding channel (105); and / or, the length of the valve core head (220) in the axial direction of the head guiding channel (105) is less than the length of the head guiding channel (105).

11. The valve according to claim 1, characterized in that, The valve body (100) includes a first assembly body (110) and a second assembly body (120). The first assembly body (110) includes a first connection portion, the second assembly body (120) includes a second connection portion, the first assembly body (110) and the second assembly body (120) are connected through the first connection portion and the second connection portion, and a second sealing member (130) is provided between the first connection portion and the second connection portion.

12. The valve according to claim 1, characterized in that, The valve body (100) has a limit hole column (140) located in the valve cavity (101). The limit hole column (140) defines a limit guiding hole (102), and the valve core tail (210) is movably fitted in the limit guiding hole (102); wherein, the reset member (300) is sleeved on the outer periphery of the limit hole column (140).

13. A spraying device, characterized in that, Comprising the valve according to any one of claims 1-12.

14. An unmanned device, characterized in that, Comprising the spraying device according to claim 13.

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