CN221097505U - Valve, sprinkler and plant protection equipment - Google Patents

Abstract

The utility model discloses a valve, a spraying device and plant protection equipment, and belongs to the technical field of valves. The valve comprises a valve body, a valve core and a reset piece, wherein a valve cavity is formed in the valve body, the valve body is provided with an inlet and an outlet which are communicated with the valve cavity, and the valve core is arranged in the valve cavity; the valve core is externally provided with a main sealing ring, the main sealing ring comprises a cantilever ring part, and the cantilever ring part is inclined from inside to outside in the direction approaching to the inlet; the valve core can move to a sealing position along the axis of the valve core to enable the cantilever ring part to be in sealing fit with the valve body, or move to an opening position to enable the cantilever ring part to be in clearance fit with the valve body; the reset member is used to cause the valve spool to have a tendency to move toward the sealing position. According to the valve, the spraying device and the plant protection equipment, the special-shaped sealing ring is arranged at the valve core, so that the smallest resetting force can be selected to meet the smallest opening pressure as possible, and meanwhile, good sealing performance is maintained; the valve can also be applied to the scene of small fluid pressure in the pipe; the valve is beneficial to improving the problem of flow attenuation at the outlet end.

Description

Valve, sprinkler and plant protection equipment

Technical Field

The utility model relates to the technical field of valves, in particular to a valve, a spraying device and plant protection equipment.

Background

The valve is a component in the fluid delivery system. When the valves such as the common stop valve and the anti-drip valve are applied to a transmission system, when the fluid pressure applied to the valve core is high, the valve core of the valve can be opened, 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 can be moved to be closed under the action of elastic force, self-gravity and other reset forces, so that the fluid is prevented from flowing to the valve outlet.

However, the inventors have found that when a higher required sealing pressure is required to be provided with a higher return force, a higher fluid pressure is required to open the valve element, and when a lower fluid pressure is required to open the valve element, the return force is only reduced, which cannot satisfy various requirements.

Disclosure of utility model

One of the purposes of the embodiments of the present utility model is: a valve is provided which allows for selection of a smaller reset force to meet a smaller opening pressure, while maintaining a better seal.

The second object of the embodiment of the utility model is that: the utility model provides a sprinkler and plant protection unmanned aerial vehicle can satisfy more user demands.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a valve, comprising:

a valve body, in which a valve cavity is formed; the valve body is provided with an inlet and an outlet which are communicated with the valve cavity;

The valve core is arranged in the valve cavity; a main sealing ring is arranged outside the valve core, and comprises a cantilever ring part, wherein the cantilever ring part is inclined from inside to outside in the direction approaching the inlet; the valve core can move to a sealing position along the axis of the valve core to enable the cantilever ring part to be in sealing fit with the valve body, or move to an opening position to enable the cantilever ring part to be in clearance fit with the valve body;

The resetting piece is arranged in the valve cavity; the return member is configured to provide a return force to the valve spool such that the valve spool has a tendency to move toward the sealing position.

Optionally, the outside of case sets up a plurality of cantilever circle portion, a plurality of cantilever circle portion along the axis direction interval setting of case.

Optionally, the main sealing ring comprises a plurality of cantilever ring parts and an inner ring part; the inner end of each cantilever ring part is connected with the inner ring part, and the inner ring part is sleeved outside the valve core.

Optionally, the valve cavity comprises a flow passage between the inlet and the outlet, the inner wall of the flow passage is a sealing matching surface, and the sealing matching surface is an inclined surface, so that the size of the flow passage increases in the direction from the inlet to the outlet;

when the valve core is positioned at the sealing position, the cantilever ring part is propped against the wall surface of the flow passage; when the valve core is positioned at the opening position, a passing gap is formed between the cantilever ring part and the wall surface of the flow passage.

Optionally, the outside of case sets up a plurality of cantilever circle portion, a plurality of cantilever circle portion's outer end all tangent with first inclined plane, sealed mating surface with first inclined plane is parallel.

Optionally, the axis of the main sealing ring is a first axis; the inner side surface of the inner ring part is a first surface, and the first surface is an arc surface protruding towards the direction approaching to the first axis.

Optionally, the valve core comprises a core body, a whole circle of assembly groove is formed in the outer side of the core body, and the main sealing ring is embedded into the assembly groove.

Optionally, the main seal ring comprises an inner ring part and a limit ring part; the inner end of the cantilever ring part is connected with the inner ring part, and the inner ring part is sleeved outside the valve core; the limit ring part is connected to one side of the inner ring part, which is close to the inlet;

The outside of case sets up first spacing convex part, first spacing convex part deviates from the one side of import forms first spacing face, spacing collar portion is close one side of import forms the second spacing face, the second spacing face with the spacing cooperation of first spacing face.

Optionally, a third limiting surface is formed on the outer side of the valve core, a fourth limiting surface is formed on the inner side surface of the limiting ring part, and the third limiting surface is abutted with the fourth limiting surface.

Optionally, the valve core comprises a core body, and the main sealing ring is sleeved on the core body;

The outside of core sets up first spacing convex part and second spacing convex part, first spacing convex part with the spacing distribution of axis interval of core is followed to the second spacing convex part, the main sealing washer is located between first spacing convex part and the second spacing convex part.

Optionally, the first limit protrusion is proximate to the inlet relative to the second limit protrusion; the size of the first limit protruding part along the radial direction of the core body is smaller than that of the second limit protruding part along the radial direction of the core body.

Optionally, the valve is an anti-drip valve or a check valve.

Optionally, the valve cavity comprises an inlet end hole section, a middle cavity part and an outlet end hole section which are sequentially communicated, the inlet is formed at one end of the inlet end hole section, and the outlet is formed at one end of the outlet end hole section;

The wall surface of the middle cavity part comprises a connecting wall surface, and the connecting wall surface is connected with the wall surface of the outlet end hole section; the connecting wall surface is gradually inclined inwards from the inlet to the outlet.

Optionally, the valve core comprises a core body and a core column which are connected, wherein the core column is positioned at one side of the core body close to the outlet;

The valve body comprises a valve casing and a limiting column which are connected, the valve cavity is formed in the valve casing, the limiting column is arranged in the valve cavity, and the core column is slidably mounted in the limiting column.

A spraying device comprising a valve according to the above-mentioned solution.

Optionally, the spraying device comprises a liquid storage tank, a liquid outlet pipe, a spraying head and a liquid pump, wherein the liquid storage tank is communicated with the spraying head through the liquid outlet pipe, the liquid pump is used for pumping liquid in the liquid storage tank to the spraying head, and the valve is arranged at one end, close to the spraying head, of the liquid outlet pipe;

and/or, sprinkler includes liquid reserve tank, feed liquor pipe and liquid pump, the one end of feed liquor pipe with the liquid reserve tank is connected, the other end of feed liquor pipe is used for being connected with outside feed liquor device, the liquid pump is used for with outside feed liquor device's liquid through the feed liquor pipe is sent to in the liquid reserve tank the feed liquor pipe is kept away from the one end of liquid reserve tank sets up the valve.

A plant protection device comprising the spraying device and the loading device according to the technical scheme; the spraying device is connected with the load device and is used for spraying liquid outwards.

The beneficial effects of the utility model are as follows: according to the valve body, the sealing effect between the valve core and the valve body can be improved through the arrangement of the special-shaped main sealing ring, so that the reset force is effectively reduced; when the valve is closed, good sealing performance can be provided to prevent liquid from flowing through; when the valve is opened, the holding force for holding the valve core to be opened is small, and enough passing clearance can be opened and maintained, so that the flow property is ensured.

The spraying device and the plant protection equipment can meet more use requirements by adopting the valve.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

FIG. 1 is a schematic view of an exploded structure of a valve according to an embodiment of the present utility model (a reset member is not shown);

FIG. 2 is a schematic view of a main seal of a valve according to an embodiment of the present utility model;

FIG. 3 is a second schematic view of a main seal ring of the valve according to the embodiment of the present utility model;

FIG. 4 is a section A-A of FIG. 3;

FIG. 5 is a cross-sectional view of a valve element of a valve according to an embodiment of the present utility model;

FIG. 6 is one of the cross-sectional views of the valve body of the valve according to the embodiment of the present utility model;

Fig. 7 is a schematic view of a second housing of a valve according to an embodiment of the present utility model;

FIG. 8 is one of the cross-sectional views of a valve according to an embodiment of the present utility model (the valve element is shown in the sealing position);

Fig. 9 is an enlarged view of a portion a in fig. 8;

FIG. 10 is a schematic diagram illustrating the cooperation of the main seal ring and the valve body according to an embodiment of the present utility model;

FIG. 11 is a second cross-sectional view of a valve according to an embodiment of the present utility model (the valve element is shown in an open position);

FIG. 12 is a third cross-sectional view of a valve according to an embodiment of the present utility model (the valve element is shown in the sealing position).

In the figure: 10. a valve body; 101. an inlet; 102. an outlet; 103. an inlet end hole section; 104. a flow-through channel; 105. an intermediate chamber portion; 106. an outlet end hole section; 1041. sealing the mating surface; 1051. connecting the wall surfaces; 11. a valve housing; 111. a first housing; 112. a second housing; 12. a limit column; 121. a limiting hole; 20. a valve core; 201. a first limiting surface; 202. a third limiting surface; 21. a core; 211. an assembly groove; 22. a stem; 23. a first limit protrusion; 24. a second limit protrusion; 30. a main seal ring; 301. a clearance gap; 31. a cantilever collar portion; 311. a first cantilever collar; 312. a second cantilever collar; 32. an inner ring portion; 321. a first face; 33. a limit ring part; 331. the second limiting surface; 332. a fourth limiting surface; 40. a reset member; 50. a shell seal ring; 80. a first inclined surface; 91. a first axis.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "affixed" and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the fluid transmission pipeline, through setting up valves such as antidrip valve, one-way check valve, realize that pipeline valve opens pipeline intercommunication when fluid pressure is great, the sealed effect of valve closure pipeline when fluid pressure is less. Valves such as an anti-drip valve and a one-way stop valve in the related art drive the valve core to stretch in the valve body by taking the elastic force of a spring or the self gravity of the valve core as a restoring force, so that the functions of opening, closing, sealing, non-return and the like of the valve are realized.

However, in practice it has been found that the need for a greater restoring force to provide better sealing performance and the need for a lower restoring force to reduce the opening pressure, which is the fluid pressure acting on the valve element and which causes the valve element to open against the restoring force, are two conflicting requirements. Illustratively: in a valve adopting a spring as a resetting piece, the larger the stiffness coefficient of the spring is, the larger the elastic force acting on the valve core is, the better the sealing performance of the valve core is, and the larger the corresponding opening pressure is; the smaller the stiffness coefficient of the spring, the smaller the elastic force acting on the valve element, the lower the sealing performance of the valve element, and the smaller the corresponding opening pressure. The related art can only make such a selection of the opening pressure and the sealing performance, but cannot meet the use requirements.

In general, in the related art, if a valve having an effect of opening a pipeline to communicate when a fluid pressure is high and closing the pipeline to seal when the fluid pressure is low is required to improve the sealing performance, a reset force needs to be improved, and if the reset force is improved, the valve core is difficult to open and difficult to hold after opening, and there is a conflict between the sealing performance and the easy-to-open performance. In addition, the valve has the problem that the valve core is opened, but the passing clearance between the valve core and the valve cavity wall is small, so that the flow of the outlet end is attenuated.

Based on this, the present application provides a valve that can be applied as an anti-drip valve, an anti-leakage valve, a check valve, a one-way valve.

The valve is provided with the special-shaped sealing ring at the valve core 20, so that the smallest possible resetting force can be selected to meet the smallest possible opening pressure, and meanwhile, the good sealing performance is maintained; in other words, the valve can enhance the sealing without increasing the restoring force. The valve is applicable to a scene where the pressure of fluid in a pipe is small, and the valve is also applicable to a scene where the pressure of fluid in a pipe is small. The valve also helps to improve the flow decay problem at the outlet 102 after the valve is opened.

It will be appreciated that the valve may be applied to liquid transfer lines as well as to gas transfer lines. When the valve is an anti-drop valve or a leakage-proof valve, the valve can be used for a liquid transmission pipeline, so that residual liquid in the pipeline is prevented from dropping out and leaking out from the outlet 102 of the transmission pipeline when the liquid flow in the transmission pipeline is smaller, and pollution or waste is avoided. The valve is applied to a liquid transfer line as an example.

Referring to fig. 1 to 12, the valve includes: valve body 10, valve element 20, main seal 30, and reset element 40.

The valve body 10 is provided with a valve cavity inside, and the valve body 10 is further provided with an inlet 101 and an outlet 102 communicating with the internal valve cavity. For ease of understanding, in some of the figures, the direction toward the opening is indicated by the direction F1, and the direction toward the outlet 102 is indicated by the direction F2.

The valve core 20 is arranged in the valve cavity, the valve core 20 is movably connected with the valve body 10, and the valve core 20 can move between a sealing position and an opening position. As shown in fig. 8 to 10 and 12, when the valve body 20 is in the sealing position, the passage between the inlet 101 and the outlet 102 is sealed, and the liquid flowing in from the inlet 101 is blocked by the valve body 20 from flowing to the outlet 102. As shown in fig. 11, when the valve cartridge 20 is in the open position, the passage between the inlet 101 and the outlet 102 is open and liquid can flow from the inlet 101 to the outlet 102.

In order to enhance the sealing performance, the main seal ring 30 is sleeved outside the valve core 20. When the valve core 20 is positioned at the sealing position, the main sealing ring 30 is tightly sealed and matched with the cavity wall of the valve cavity so as to realize the stop of fluid from the inlet 101 to the outlet 102. When the primary seal ring 30 is in the open position, there is a gap, i.e., a clearance fit, between the primary seal ring 30 and the wall of the valve chamber to allow communication between the inlet 101 and the outlet 102, allowing fluid to flow from the outlet 102.

The return member 40 is provided in the valve chamber, and the return member 40 is configured to provide a return force to the valve element 20 so that the valve element 20 has a tendency to move toward the sealing position. In this embodiment, an elastic member is used as the restoring member 40, the elastic member is disposed between the valve core 20 and the valve body 10, and the elastic force of the elastic member is a restoring force. In other embodiments, the return force may be provided by the weight of the spool 20 itself, at which point the return member 40, the spool 20 itself. The following embodiment will be described with reference to the elastic member as the return member 40.

The main sealing ring 30 matched with the valve core 20 is a special sealing ring. Referring to fig. 1 to 4 and 8 to 11, the main seal ring 30 includes a cantilever ring portion 31. The first axis 91 illustrated in fig. 4 is the central axis of the primary seal ring 30. Referring to fig. 8 to 10, the cantilever collar 31 is inclined with respect to the first axis 91, the cantilever collar 31 is inclined from inside to outside in a direction approaching the inlet 101, and the cross section of the cantilever collar 31 is inverted-splayed. The end of the cantilevered annular portion 31 facing away from the first axis 91 is a free end, and the end of the cantilevered annular portion 31 is adapted to abut the wall of the valve cavity to sealingly engage the primary seal ring 30 with the valve body 10. The wall of the valve chamber includes a sealing mating surface 1041.

The working principle of the valve is as follows:

Referring to fig. 8 to 10 and 12, when the inlet 101 has no water inlet or the water inlet pressure is less than the opening pressure, the valve core 20 moves to the sealing position under the elastic force of the elastic member, the cantilever ring portion 31 of the main sealing ring 30 is inclined, approximately in the shape of an inverted-eight, and the end of the cantilever ring portion 31 is in close contact with the sealing mating surface 1041 of the valve cavity, thereby preventing the passage of liquid. Meanwhile, since the cantilever collar 31 is inclined toward the inlet 101 from the root portion thereof to the tip end thereof, the inner side surface of the cantilever collar 31 is inclined toward the inlet 101. When the water inlet pressure is small, the liquid will act on the inner side surface of the cantilever ring 31, referring to fig. 10, in the water sealed state in the pipe, the liquid pressure acts on the inner side surface of the cantilever ring 31, and the inner-to-outer side pressure (denoted as F liquid in the drawing) acts on the cantilever ring 31, so that the bonding tightness between the end of the cantilever ring 31 and the sealing mating surface 1041 of the valve body 10 is increased, and the sealing performance can be enhanced without additionally increasing the stiffness coefficient of the elastic member, i.e. without additionally increasing the restoring force. The elastic member with smaller elastic force can be selected without additionally increasing the stiffness coefficient of the elastic member, so that the valve body 10 has smaller opening pressure, and is suitable for more application scenes.

The inventor considered that an O-ring is used as the main seal ring 30 to be sleeved outside the valve core 20, but the inventor found that the O-ring provides limited sealing performance, and the restoring force needs to be increased to enhance the sealing performance. The special-shaped sealing ring is adopted as the main sealing ring 30, and the main sealing ring 30 is provided with the cantilever ring part 31 which extends obliquely relative to the first axis 91, so that on one hand, when the water inlet pressure is smaller than the opening pressure, the cantilever ring part 31 is tightly attached to the sealing matching surface 1041 of the cavity wall when a certain outward lateral pressure is acted on the cantilever ring part 31 by utilizing the small water pressure, and the better sealing performance can be obtained without increasing the restoring force; in the second aspect, even when water is not fed, since the cantilever ring 31 is in the cantilever form, when the tip of the cantilever ring 31 is pressed inward by the cavity wall, the cantilever ring 31 has a tendency to be fitted outward, and the main seal ring 30 of the present utility model can improve sealing performance with respect to the O-ring.

Referring to fig. 11, when the inlet 101 is filled with liquid and the inlet pressure is greater than the opening pressure, the elastic member is compressed, the valve body 20 moves in the valve axis direction by the liquid pressure, the main seal ring 30 is separated from the seal mating surface 1041 of the valve body 10, and the liquid passes through the gap between the main seal ring 30 and the valve body 10, which is the passing gap. The size of the passing gap affects the liquid passing performance, and the larger the passing gap is, the better the liquid passing performance is, and the smaller the passing gap is, the worse the liquid passing performance is, so that the liquid flow rate is attenuated after passing through the valve element 20. In order to ensure that a sufficient passage gap is opened, the smaller the stiffness coefficient of the resilient member, the better the primary seal ring 30 is ensured to meet the sealing performance requirements. Due to the overall design of the inclined cantilever of the main seal ring 30, the sealing performance is improved to a certain extent, so that the stiffness coefficient of the elastic member with a certain space is provided, and the water pressure for opening the valve core 20 and compressing the elastic member can be kept low.

According to the valve body 10, the sealing effect between the valve core 20 and the valve body 10 can be improved by arranging the special-shaped main sealing ring 30, so that a space is provided for reducing the restoring force. Thus, on the one hand, when the valve is closed, good sealing performance can be provided, liquid is prevented from flowing through, and leakage of the tail end outlet 102 is avoided; in the second aspect, when the valve is opened, since the restoring force is low, the holding force for holding the valve element 20 open is small, and a sufficient passage gap can be opened and maintained, so that the flow-through property is ensured, and the degree of flow attenuation of the outlet 102 is reduced.

With continued reference to fig. 2 to 4 and 9, in order to improve the sealing performance, a plurality of cantilever ring portions 31 are provided outside the valve body 20, and the plurality of cantilever ring portions 31 are provided at intervals along the axial direction of the valve body 20. The term "plurality of" as used herein means two or more. When the valve core 20 is located at the sealing position, the plurality of cantilever ring parts 31 are in interference fit with the sealing matching surface 1041 in the valve cavity, so that multi-layer sealing is provided, the sealing reliability is ensured, the sealing performance is improved, and a space with reduced resetting force is provided. The cantilever ring portions 31 need to be arranged at intervals, and a clearance gap 301 is formed between adjacent cantilever ring portions 31, so that the thickness of each cantilever ring portion 31 is not too thick, the tail end of each cantilever ring portion 31 has good elasticity, and when tiny liquid pressure acts on the inner side surface of each cantilever ring portion 31, the clearance gap 301 provides a certain deformation space for the cantilever ring portions 31, so that the tail end of each cantilever ring portion 31 is more closely attached to the inner wall of the valve body 10.

In this embodiment, a plurality of cantilever ring portions 31 are disposed in one main seal ring 30, the main seal ring 30 further includes an inner ring portion 32, and root portions on inner sides of the two cantilever ring portions 31 are connected to the inner ring portion 32. The main sealing ring 30 is sleeved outside the valve core 20 through the inner ring part 32. A plurality of cantilever ring parts 31 are arranged on one main sealing ring 30, so that the number of parts is small, and the assembly is convenient. In other embodiments, each primary seal ring 30 may include only one cantilever ring 31, and a plurality of cantilever rings 31 may be directly sleeved on the valve core 20.

Referring to fig. 3 and 4, the main seal ring 30 includes two cantilever ring portions 31, wherein the cantilever ring portion 31 near the inlet 101 is a first cantilever ring portion 311, and the cantilever ring portion 31 near the outlet 102 is a second cantilever ring portion 312. The end of the second cantilever collar 312 is outwardly opposite the end of the first cantilever collar 311.

With continued reference to fig. 6 and 9 to 11, the valve element 20 and the engagement between the main seal 30 and the valve body 10 will be described. The valve chamber includes a flow passage 104 between the inlet 101 and the outlet 102, and the inner wall of the flow passage 104 is a sealing mating surface 1041, and the sealing mating surface 1041 is an inclined surface, so that the direction of the flow passage 104 from the inlet 101 to the outlet 102 is gradually increased.

Referring to fig. 8 to 10, when the valve core 20 is in the sealing position, the cantilever ring 31 abuts against the wall surface of the through-flow channel 104, so that the main seal ring 30 is in sealing fit with the valve body 10, and at this time, the liquid cannot flow to the outlet 102, so as to realize drip prevention at the end of the outlet 102. Referring to fig. 11, when the valve body 20 is in the open position, a passage gap is formed between the cantilever ring 31 and the wall surface of the through-flow passage 104 so that the cantilever ring 31 is in clearance fit with the valve body 10, and liquid can flow from the inlet 101 to the outlet 102. When the pressure of the liquid entering is high, the liquid pressure overcomes the restoring force, the liquid pressure pushes the valve core 20 to approach the outlet 102, and when the valve core 20 moves to approach the outlet 102 due to the gradual increase of the sealing matching surface 1041, the cantilever ring 31 gradually separates from the sealing matching surface 1041, and the passing gap is opened.

With continued reference to fig. 4, 9 and 10, when a plurality of axially spaced cantilever ring portions 31 are provided on the outside of the valve body 20, the plurality of cantilever ring portions 31 are configured to: the outer ends (i.e., distal ends) of the plurality of cantilevered annular portions 31 are each tangential to the first angled surface 80, and the sealing engagement surface 1041 is parallel to the first angled surface 80. Thus, when the valve element 20 is in the sealing position, the interference degree of the plurality of cantilever ring portions 31 and the sealing engagement surface 1041 is substantially consistent, so as to ensure that the plurality of cantilever ring portions 31 are in sealing engagement with the valve body 10 at the same time or are separated from the valve body 10 at the same time, and provide a good multi-layer sealing effect. The present embodiment can avoid that one cantilever ring 31 is sealed or separated from the inner wall of the valve body 10 when the other cantilever ring 31 is sealed or separated from the inner wall of the valve body 10. Wherein, the separation opening of one of the plurality of cantilever ring parts 31 and the non-separation opening of the other are avoided, the sudden change of the flow velocity can be avoided, and the passing flow rate and the passing speed are prevented from being influenced.

With continued reference to fig. 4 and 5, the inner side surface of the inner ring portion 32 is a first surface 321, the first surface 321 is an arc surface protruding outwards, and the inner side shape of the inner ring portion 32 approximates to the inner side shape of the O-ring. Therefore, when the inner ring part 32 is sleeved on the valve core 20, the inner ring part 32 and the valve core 20 can be tightly attached, on one hand, the effect of sealing a channel between the inlet 101 and the outlet 102 is enhanced, and leakage prevention is realized. On the other hand, the main sealing ring 30 is not easy to move along the axial direction of the valve core 20, and the sealing effect of the main sealing ring 30 and the valve body 10 is ensured.

In order to improve the assembly stability of the main seal ring 30 and improve the tightness between the main seal ring 30 and the valve core 20, referring to fig. 5, 9 and 10, the valve core 20 includes a core body 21, a whole circle of assembly grooves 211 are formed on the outer side of the core body 21, and the inner part of the main seal ring 30 is embedded into the assembly grooves 211, so that the main seal ring 30 has a certain axial limiting function, and thus, under the condition that the hydraulic pressure does not reach the opening pressure, that is, under the condition that the main seal ring 30 is not moved by the valve core 20, the main seal ring 30 is prevented from moving along the axial direction on the valve core 20, and further, the unexpected separation of the cantilever ring 31 and the sealing matching surface 1041 of the valve body 10 is prevented, so that the leakage of the outlet 102 is caused. In this embodiment, the inner ring portion 32 on the inner side of the main seal ring 30 is fitted into the fitting groove 211, the inner side of the inner ring portion 32 is an arcuate surface protruding outward, and the fitting groove 211 is an arcuate groove.

In other embodiments, the first surface 321 of the inner ring portion 32 may also be configured as an inward concave arc surface, and correspondingly, cooperate with an outward convex arc surface of the valve core 20, so as to enhance the reliability of assembling between the inner ring portion 32 and the valve core 20, and enhance the stability of the position of the main seal ring 30.

In other embodiments, the first face 321 may also be a beveled or vertical plane.

With continued reference to fig. 2, 4, 5, 9 and 10, the main seal ring 30 includes an inner ring portion 32 and a stop ring portion 33; the inner end of the cantilever ring part 31 is connected with the inner ring part 32, and the inner ring part 32 is sleeved outside the valve core 20; the retainer segment 33 is connected to a side of the inner segment 32 proximate the inlet 101. The outside of the core 21 is provided with a first limit convex part 23, one side of the first limit convex part 23, which is away from the inlet 101, forms a first limit surface 201, one side of the limit ring part 33, which is close to the inlet 101, forms a second limit surface 331, and the second limit surface 331 is in limit fit with the first limit surface 201. Referring to fig. 10, when water enters the inlet 101 and the water inlet pressure is smaller than the opening pressure, the liquid enters the inner side of the cantilever ring portion 31 close to the inlet 101, a certain outward lateral pressure is applied to the tail end of the cantilever ring portion 31 by the liquid, the tail end of the cantilever ring portion 31 has a certain outward turning trend, and the inner side of the main sealing ring 30 can be prevented from being separated from the outer wall of the valve core 20 under the turning trend by the first limiting protrusion 23 and the limiting ring portion 33, so that the main sealing ring 30 is tightly matched with the valve core 20, and the position of the main sealing ring 30 is prevented from moving. The cantilever ring portion 31 of the main sealing ring 30 near the inlet 101 is slightly higher than the inner limit ring portion 33, so that the limit effect is good, and the main sealing ring 30 can be assembled to the valve core 20 more easily.

In this embodiment, the first limiting surface 201 and the second limiting surface 331 are both planes, and the two limiting surfaces can be flatly attached to realize limiting, and when the main sealing ring 30 is assembled to the core 21, the two limiting surfaces are not easy to block each other. In other embodiments, the first limiting surface 201 and the second limiting surface 331 may be curved surfaces or arc surfaces.

With continued reference to fig. 2, 4, 5, 9 and 10, a third limit plane is formed on the outer side of the core 21 of the valve core 20, a fourth limit surface 332 is formed on the inner side surface of the limit ring 33, and the third limit surface 202 abuts against the fourth limit surface 332. The third limiting surface 202 and the fourth limiting surface 332 may be planar. In this way, by setting the first limiting surface 201 and the third limiting surface of the valve core 20, a step is formed on one side of the arc-shaped assembling groove 211, which is close to the inlet 101 of the valve body 10, for accommodating the limiting ring part 33 of the main sealing ring 30, so that the installation and positioning of the limiting ring part 33 are convenient to realize. The third limiting surface 202 and the fourth limiting surface 332 also play a role in limiting the inward overturning of the main sealing ring 30, and maintain the stability of the position state of the main sealing ring 30.

In other embodiments, the third stop surface 202 and the fourth stop surface 332 may not be provided. In other embodiments, the third limiting surface 202 and the fourth limiting surface 332 may be curved surfaces.

Referring to fig. 5, 9 and 10, the valve core 20 includes a core 21, and a main sealing ring 30 is sleeved on the core 21; the outside of the core 21 is provided with a first limit convex part 23 and a second limit convex part 24, the first limit convex part 23 and the second limit convex part 24 are distributed at intervals along the axis of the core 21, and the main sealing ring 30 is positioned between the first limit convex part 23 and the second limit convex part 24. The end of the main sealing ring 30 close to the inlet 101 and the end close to the outlet 102 are limited and supported by the first limiting convex part 23 and the second limiting convex part 24 respectively. The main seal ring 30 is prevented from axial displacement relative to the valve core 20, and the main seal ring 30 is kept stably in close sealing fit with the sealing fit surface 1041 of the valve body 10. And the main sealing ring 30 is conveniently sleeved on the core 21 by adopting the mode, so that the main sealing ring 30 is provided for installation and positioning, and the assembly efficiency is improved.

In one embodiment, the first limit protrusion 23 is proximate to the inlet 101 relative to the second limit protrusion 24; the first limit protrusion 23 has a dimension d1 along the radial direction of the core 21, and the second limit protrusion 24 has a dimension d2 along the radial direction of the core 21, wherein d1 is smaller than d2. In other words, the second stopper protrusion 24, which is farther from the inlet 101, is wider, so that the second stopper protrusion 24 can stably support the main seal ring 30 from the lower end of the main seal ring 30 when the liquid pressure acts on the main seal ring 30 from the upper end of the main seal ring 30. While the first limit projection 23 is configured to be narrow so that the main seal ring 30 can be conveniently fitted over the core 21 from the upper end. In other embodiments, the first limit protrusion 23 and the second limit protrusion 24 may also be identical in size.

Referring to fig. 6, 7, 8, 11 and 12, the valve chamber includes an inlet hole section 103, a middle chamber 105 and an outlet hole section 106, which are sequentially communicated, an inlet 101 is formed at one end of the inlet hole section 103, and an outlet 102 is formed at one end of the outlet hole section 106. The wall surface of the intermediate chamber 105 includes a connecting wall surface 1051, and the connecting wall surface 1051 is connected to the wall surface of the outlet hole section 106. The inventors found that in the related art, the valves such as the drip-proof valve, the leak-proof valve, and the flow stop valve generally have the connecting wall 1051 as a flat surface perpendicular to the central axis of the valve body 10, which brings about abrupt displacement, so that when the valve is opened to open the liquid, the liquid in the pipeline is abruptly changed in direction when the liquid flows to the connection between the intermediate chamber 105 and the outlet end hole 106, resulting in a decrease in flow velocity, a decrease in flow rate, and an influence on the accuracy of the liquid. Based on this, the inventors configure the connection wall 1051 in a direction from the inlet 101 to the outlet 102, and the connection wall 1051 gradually inclines inward, so that the pipe diameter at the end of the intermediate chamber 105 gradually deteriorates, reducing the attenuation of the flow in the pipe. Wherein the connecting wall 1051 may be tapered.

In one embodiment, the valve body 10 includes a first housing 111, a second housing 112, and a housing seal ring 50, the inlet 101, the inlet port section 103, and the flow passage 104 are located in the first housing 111, at least a portion of the intermediate chamber 105, the outlet port section 106, and the outlet 102 are located in the second housing 112, and the stopper post 12 is disposed in the second housing 112. The first housing 111 is screwed with the second housing 112, and a housing seal ring 50 is disposed between the first housing 111 and the second housing 112, and the housing seal ring 50 may be an O-ring.

In one embodiment, the valve core 20 includes a core 21 and a stem 22 connected, the stem 22 being located on a side of the core 21 proximate to the outlet 102; the valve body 10 comprises a valve housing 11 and a limiting column 12 which are connected, a valve cavity is formed in the valve housing 11, the limiting column 12 is arranged in the valve cavity, and a core column 22 is slidably arranged in the limiting column 12. In this embodiment, the limiting post 12 is provided with a limiting hole 121, and the stem 22 is slidably inserted into the limiting hole 121. The limiting hole 121 serves as a sliding mount and guide.

In one embodiment, the elastic member is a spring, one end of the spring is fixed or abutted against one end of the core 21 near the outlet 102, the other end of the spring is sleeved on the limiting post 12, and the other end of the spring is relatively fixed with the limiting post 12.

The application also provides a spraying device and plant protection equipment, wherein the plant protection equipment can be, but is not limited to, a plant protection unmanned aerial vehicle and a plant protection unmanned aerial vehicle. In agricultural plant protection field, use sprinkler to outwards spray liquid such as pesticide, nutrient solution to replace artifical spraying, improve the operating efficiency.

The spraying device adopts the valve in any embodiment, and the spraying device comprises a plurality of connecting pipes for realizing the communication among all mechanisms in the liquid transmission system, and the valve is arranged in any connecting pipe, so that the operation effect can be improved. The connecting pipe can be a liquid inlet pipe, a liquid outlet pipe or the like.

In one embodiment, the spraying device comprises a liquid storage tank, a liquid outlet pipe, a spraying head and a liquid pump, wherein the liquid storage tank is communicated with the spraying head through the liquid outlet pipe, the liquid pump is used for pumping liquid in the liquid storage tank to the spraying head, and the valve is arranged at one end of the liquid outlet pipe, close to the spraying head, and is used as an anti-drip valve. Wherein the inlet 101 of the valve body 10 of the valve is located on the side close to the tank and the outlet 102 is located on the side close to the sprinkler head. Like this, when spraying the operation, the liquid measure is big in the drain pipe, and drip proof valve is automatic to be opened, and at this moment, liquid in the liquid reserve tank can pump to the sprinkler head in order to outwards spray, and after the spraying operation of accomplishing the liquid measure of prediction, the liquid measure is little in the drain pipe, and drip proof valve is automatic to be closed, and at this moment, remaining liquid in the drain pipe can not flow to the sprinkler head, avoids sprinkler head department to drip unnecessary liquid, causes extravagant and pollution. Of course, the valve may be employed in any piping in the sprinkler. In addition, the valve can reduce the opening pressure, so that the valve can be sprayed outwards when the flow in the liquid outlet pipe is smaller, and more application scenes are met.

In an embodiment, the spraying device comprises a liquid storage tank, a liquid inlet pipe and a liquid pump, wherein the first end of the liquid inlet pipe is connected with the liquid storage tank, the second end of the liquid inlet pipe is used for being connected with an external liquid supply device, the external liquid supply device can be a liquid supply tank and the like, the liquid pump is used for supplying liquid of the external liquid supply device into the liquid storage tank through the liquid inlet pipe so as to supplement liquid medicine in the liquid storage tank, a valve is arranged at the first end of the liquid inlet pipe, and the valve is used as a check valve. Wherein the inlet 101 of the valve body 10 of the valve is located on the side close to the reservoir and the outlet 102 is located on the side facing away from the reservoir. Thus, when fluid is required to be replenished, the first end of the fluid inlet pipe is connected with an external fluid supply device, fluid from the external fluid supply device is sent to the valve under pumping of the fluid pump, fluid enters the valve body 20 from the inlet 101, the valve core 20 can move to an open position under hydraulic action, the valve is punched, and the fluid from the fluid supply device is pumped to the fluid storage tank. After the liquid supplementing is completed, the first end of the liquid inlet pipe is disconnected with an external liquid supply device, the liquid pump stops working, the liquid enters the valve body 20 from the inlet 101, the hydraulic pressure acting on the valve core 20 is reduced, the valve core 20 automatically resets to a sealing position under the action of a resetting force, at the moment, liquid remained in the liquid inlet pipe can be prevented from flowing back to the first end of the liquid inlet pipe, and after the liquid supplementing is stopped, a small amount of residual liquid in the liquid inlet pipe is prevented from flowing back from the first end to drip, so that external environment pollution is avoided. In addition, the valve can reduce the opening pressure, so that liquid can be supplemented to the liquid storage tank when the flow rate of the liquid inlet pipe is smaller, and more application scenes are met.

When the valve element 20 is in the closed position, the valve element 20 prevents fluid from flowing from the inlet 101 to the outlet 102 so that the valve can be used as an anti-drip valve. When the valve element 20 is in the closed position, the valve element 20 also has a certain function of preventing the flow of liquid from the outlet 102 to the inlet 101, so that the valve can be applied as a check valve.

The plant protection equipment comprises the valve. In an embodiment, the plant protection device comprises the spraying device further comprises a load device, the spraying device is connected with the load device, and the spraying device is used for spraying liquid outwards. The load device may be an unmanned aerial vehicle or an unmanned vehicle.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Based on the teachings herein, one of ordinary skill in the art will recognize additional embodiments of the utility model without undue burden _.

Claims (17)

1. A valve, comprising:

A valve body (10) having a valve cavity formed therein; the valve body (10) is provided with an inlet (101) and an outlet (102) which are communicated with the valve cavity;

A valve core (20) arranged in the valve cavity; a main sealing ring (30) is arranged outside the valve core (20), the main sealing ring (30) comprises a cantilever ring part (31), and the cantilever ring part (31) is inclined from inside to outside in a direction approaching the inlet (101); the valve core (20) can move to a sealing position along the axis of the valve core to enable the cantilever ring part (31) to be in sealing fit with the valve body (10), or move to an opening position to enable the cantilever ring part (31) to be in clearance fit with the valve body (10);

A reset piece (40) arranged in the valve cavity; the return member (40) is configured to provide a return force to the valve spool (20) such that the valve spool (20) has a tendency to move toward the sealing position.

2. The valve according to claim 1, wherein a plurality of the cantilever ring portions (31) are provided outside the valve body (20), and the plurality of cantilever ring portions (31) are provided at intervals in the axial direction of the valve body (20).

3. The valve according to claim 2, wherein the main seal ring (30) comprises a plurality of the cantilever ring portions (31), further comprising an inner ring portion (32); the inner end of each cantilever ring part (31) is connected with the inner ring part (32), and the inner ring part (32) is sleeved outside the valve core (20).

4. The valve according to claim 1, characterized in that the valve chamber comprises a flow passage (104) between the inlet (101) and the outlet (102), an inner wall of the flow passage (104) being a sealing mating surface (1041), the sealing mating surface (1041) being a slope such that the flow passage (104) increases in size in a direction from the inlet (101) to the outlet (102);

When the valve core (20) is positioned at the sealing position, the cantilever ring part (31) is propped against the wall surface of the flow passage (104); when the valve core (20) is positioned at the opening position, a passing clearance is formed between the cantilever ring part (31) and the wall surface of the through-flow channel (104).

5. The valve according to claim 4, wherein a plurality of cantilever ring parts (31) are arranged outside the valve core (20), outer ends of the cantilever ring parts (31) are tangential to a first inclined surface (80), and the sealing matching surface (1041) is parallel to the first inclined surface (80).

6. A valve according to claim 3, wherein the axis of the main seal (30) is a first axis (91); the inner side surface of the inner ring part (32) is a first surface (321), and the first surface (321) is an arc surface protruding in a direction approaching the first axis (91).

7. Valve according to any of claims 1-6, characterized in that the valve cartridge (20) comprises a cartridge body (21), that the outer side of the cartridge body (21) is provided with a complete turn of fitting groove (211), that the inner side of the main sealing ring (30) is embedded in the fitting groove (211).

8. Valve according to any one of claims 1-6, wherein the main seal ring (30) comprises an inner ring portion (32) and a stop ring portion (33); the inner end of the cantilever ring part (31) is connected with the inner ring part (32), and the inner ring part (32) is sleeved outside the valve core (20); the limit ring part (33) is connected to one side of the inner ring part (32) close to the inlet (101);

the outside of case (20) sets up first spacing convex part (23), first spacing convex part (23) deviate from one side of import (101) forms first spacing face (201), spacing circle portion (33) are close one side of import (101) forms second spacing face (331), second spacing face (331) with spacing cooperation of first spacing face (201).

9. The valve according to claim 8, wherein a third stop surface (202) is formed on the outer side of the valve element (20), a fourth stop surface (332) is formed on the inner side surface of the stop collar portion (33), and the third stop surface (202) abuts against the fourth stop surface (332).

10. The valve according to any one of claims 1-6, wherein the valve cartridge (20) comprises a cartridge body (21), the main seal ring (30) being fitted over the cartridge body (21);

The outside of core (21) sets up first spacing convex part (23) and second spacing convex part (24), first spacing convex part (23) with second spacing convex part (24) are followed the axis interval distribution of core (21), main sealing washer (30) are located between first spacing convex part (23) and second spacing convex part (24).

11. The valve according to claim 10, wherein the first limit projection (23) is proximate to the inlet (101) relative to the second limit projection (24); the size of the first limit protrusion (23) along the radial direction of the core body (21) is smaller than the size of the second limit protrusion (24) along the radial direction of the core body (21).

12. The valve according to any one of claims 1-6, wherein the valve is an anti-drip valve or a check valve.

13. The valve according to any one of claims 1-6, wherein the valve chamber comprises an inlet port section (103), an intermediate chamber portion (105) and an outlet port section (106) which are communicated in sequence, the inlet port (101) being formed at one end of the inlet port section (103), the outlet port (102) being formed at one end of the outlet port section (106);

The wall surface of the middle cavity part (105) comprises a connecting wall surface (1051), and the connecting wall surface (1051) is connected with the wall surface of the outlet end hole section (106); the connecting wall (1051) is gradually inclined inwards from the inlet (101) to the outlet (102).

14. The valve according to any one of claims 1-6, wherein the valve cartridge (20) comprises a coupled cartridge body (21) and a stem (22), the stem (22) being located on a side of the cartridge body (21) proximate to the outlet (102);

The valve body (10) comprises a valve shell (11) and a limiting column (12) which are connected, the valve cavity is formed in the valve shell (11), the limiting column (12) is arranged in the valve cavity, and the core column (22) is slidably mounted in the limiting column (12).

15. A spraying device comprising a valve according to any one of claims 1 to 14.

16. The spraying device of claim 15, comprising a liquid reservoir, a liquid outlet pipe, a spraying head, and a liquid pump, wherein the liquid reservoir is communicated with the spraying head through the liquid outlet pipe, the liquid pump is used for pumping liquid in the liquid reservoir to the spraying head, and the valve is arranged at one end of the liquid outlet pipe close to the spraying head;

and/or, sprinkler includes liquid reserve tank, feed liquor pipe and liquid pump, the one end of feed liquor pipe with the liquid reserve tank is connected, the other end of feed liquor pipe is used for being connected with outside feed liquor device, the liquid pump is used for with outside feed liquor device's liquid through the feed liquor pipe is sent to in the liquid reserve tank the feed liquor pipe is kept away from the one end of liquid reserve tank sets up the valve.

17. Plant protection equipment, characterized by comprising a spraying device according to claim 15 or 16 and a loading device; the spraying device is connected with the load device and is used for spraying liquid outwards.