Instant-closing and instant-stopping water outlet structure

Abstract

The utility model provides an instant-closing and instant-stopping water outlet structure. The instant-closing and instant-stopping water outlet structure comprises a water outlet channel, a sealing piece, a water passing cavity, a negative pressure generating cavity, a piston rod and an elastic piece. And the water outlet channel is provided with a water outlet. And the sealing piece is arranged at the water inlet of the water outlet channel and is provided with an elastic trumpet-shaped sealing end. The water passing cavity is provided with a water inlet channel and a water passing channel communicated with the water outlet channel. And the negative pressure generating cavity is communicated with the water inlet channel and the water passing channel. The piston rod is telescopically arranged in the negative pressure generating cavity, and the elastic piece pushes the piston rod to extend out of the front end of the negative pressure generating cavity so as to block the water inlet channel and the water passing channel. According to the instant-closing and instant-stopping water outlet structure, the elastic performance is arranged on the independent sealing pieces, the strength of the water outlet channel can be improved, the service life of the water outlet channel can be prolonged, meanwhile, the sealing pieces can be independently arranged, when individual sealing pieces are damaged, the sealing pieces can be independently replaced, and the production cost and the maintenance cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water outlet structures, in particular to a water outlet structure that stops water immediately when closed. Background Art

[0002] The water outlet structure that stops water immediately when closed is mostly applied to shower products. It is required that when the user turns off the water, the shower can stop water immediately and no longer leak or drip. At present, most of the water outlet structures that stop water immediately on the market adopt the structure of a movable plate with a plugging convex column. In the water passing state, the movable plate is pushed by water pressure to be separated from the water outlet panel, and the plugging convex column is withdrawn from the water outlet nozzle, so that the water outlet nozzle can discharge water. When the water supply is stopped, the movable plate is reset under the action of a spring and plugs the water outlet nozzle again to achieve the effect of stopping water immediately. However, this type of water outlet structure that stops water immediately is not applicable to the case of low water pressure, which will cause poor water outlet effect. For this reason, some improvement schemes have been proposed on the market. For example, the plugging convex column is fixedly installed, and the water outlet nozzle is formed of an elastic material, and the water outlet nozzle is sleeved on the outer peripheral part of the plugging convex column. In the water passing state, the inner wall of the water outlet nozzle and the outer wall of the plugging convex column are pushed open by water pressure to form a water outlet gap. When the water supply is cut off, the inner wall of the water outlet nozzle and the outer wall of the plugging convex column are restored and fit together again to form the effect of stopping water immediately. Compared with the previous structure, this structure requires less water pressure, but there are still the following problems: 1. The forming difficulty of the water outlet panel is greatly improved; 2. The water outlet nozzle needs to adopt a thin structure, which not only has a high forming difficulty, but also is easy to be damaged or broken by water pressure; 3. The damage of individual water outlet nozzles will cause the replacement of the entire water outlet panel, resulting in high production costs and maintenance costs. For this reason, the utility model provides a new water outlet structure that stops water immediately, which can solve the above technical problems. Content of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a water outlet structure with good water stopping effect immediately when closed and more durable.

[0004] A water outlet structure that stops water immediately when closed includes a water outlet channel, a seal, a water passing cavity, a negative pressure generating cavity, a piston rod and an elastic member. Among them,

[0005] One end of the water outlet channel is provided with a water inlet, and the other end is provided with a water outlet, through which water can flow.

[0006] The seal is installed at the water inlet of the water outlet channel and is provided with a horn-shaped sealing end extending into the water outlet channel. The horn-shaped sealing end has elasticity and can open or block the water outlet channel, so as to realize water passing and water cut-off.

[0007] The water passing cavity is provided with a water inlet channel and a water passing channel, and the water passing channel communicates with the water inlet of the water outlet channel.

[0008] One end of the negative pressure generating chamber is the front end, which is connected to the water inlet channel, and the other end is the rear end, which is connected to the water passing channel.

[0009] The piston rod telescopically fits into the negative pressure generating chamber. The elastic member is arranged between the negative pressure generating chamber and the piston rod, and pushes the piston rod to extend out from the front end of the pressure generating chamber to block the water inlet channel and the water passing channel.

[0010] In the water inlet state of the instant-on-and-off structure provided by the present utility model, the piston rod is pushed to contract by the water inlet hydraulic force of the water inlet channel. At this time, the water inlet channel and the water passing channel are connected, water flows in, the horn-shaped sealing end is bent under the action of the water flow, the edge of the horn-shaped sealing end is separated from the inner wall of the water outlet channel, and a water passing gap is formed. The water outlet channel is in a connected state and water flows out.

[0011] In the water stop state, the piston rod resets and blocks the water inlet channel and the water passing channel. During the reset process of the piston rod, the end gradually moves away from the rear end of the negative pressure generating chamber, forming a negative pressure acting on the rear end of the negative pressure generating chamber and the water passing channel. At this time, the edge of the horn-shaped sealing end returns and fits the inner wall of the water outlet channel, and the water outlet channel is in a blocked state, achieving the instant-stop effect.

[0012] The instant-on-and-off water outlet structure provided by the present utility model adopts a sealing member independent of the water outlet channel, and the sealing member is provided with an elastic horn-shaped sealing end, which can block the water outlet channel in the water stop state, and utilize the hydraulic force to bend the horn-shaped sealing end in the water passing state to realize the connection of the water outlet channel, that is, it can achieve the effect of turning off the water immediately. At the same time, setting the elastic performance on the independent sealing member can avoid increasing the structural complexity and molding difficulty of the water outlet channel and its main body (water outlet panel), and can also improve the strength and service life of the water outlet channel. At the same time, each sealing member can be independently set, so that when an individual sealing member is damaged, it can be independently replaced, reducing the production cost and maintenance cost.

[0013] [[ID=X15]]Preferably, the sealing member is installed at the water inlet of the water outlet channel through a mounting seat, reducing the installation difficulty of the sealing member.

[0014] Preferably, the mounting seat is in the shape of a bracket, erected at the water inlet of the water outlet channel, and is provided with a communication hole for the water inlet of the water outlet channel.

[0015] Preferably, to improve the uniformity of the hydraulic pressure on the sealing member, there are a plurality of communication holes, which are evenly distributed around the axis of the water outlet channel and all face the horn-shaped sealing end, allowing the water flow to impact the horn-shaped sealing end directly, so that even in the case of a small water flow, the water passing gap can still be opened.

[0016] Preferably, the mounting seat is columnar and is installed spaced apart from and opposite to the water inlet of the water outlet channel.

[0017] Preferably, the mounting seat is coaxial with the water outlet channel and extends into the water outlet channel. An annular connecting hole is formed between the periphery of the mounting seat and the inner wall of the water outlet channel. The connecting hole faces the trumpet-shaped sealing end, allowing the water flow to positively impact the trumpet-shaped sealing end. Even when the water flow is small, the water flow gap can still be opened.

[0018] Preferably, the mounting seat is provided with a mounting hole, the middle of the sealing member is provided with a mounting head, the mounting head is inserted into the mounting hole, and the end of the mounting head is provided with an undercut, which has a simple structure and is easy to assemble.

[0019] Preferably, the mounting seat is provided with an annular groove, the middle portion of the sealing member is provided with a limiting hole, and the sealing member is sleeved on the annular groove of the mounting seat through the limiting hole, which has a simple structure and is easy to assemble.

[0020] Preferably, the water inlet edge of the water outlet channel is chamfered to form a cone pointing to the trumpet-shaped sealing end, allowing the water flow to impact the trumpet-shaped sealing end as positively as possible, and even when the water flow is small, the water flow gap can still be opened.

[0021] Preferably, the water outlet end of the water outlet channel forms a water outlet nozzle, and the water outlet is arranged at the end of the water outlet nozzle.

[0022] Preferably, the water outlet nozzle is provided with a plurality of water outlets, thereby reducing the number of the on-off water outlet structures in the water outlet.

[0023] Preferably, the section of the piston rod toward the rear end of the negative pressure generating chamber is the tail, and the section toward the front end of the negative pressure generating chamber is the head. In order to achieve a greater negative pressure effect, the diameter of the tail is larger than the diameter of the head. Correspondingly, the diameter of the negative pressure generating chamber connected to the water flow channel is larger than the diameter of the end connected to the water inlet channel. During the resetting and movement of the piston rod, the volume of the cavity formed by the movement of the tail of the piston rod is larger than the volume of water pushed into the water flow channel by the movement of the head. At this time, the difference between the two volumes forms a negative pressure, and the larger the difference, the greater the negative pressure.

[0024] Preferably, in order to avoid the problem that negative pressure is formed in the middle part of the piston rod when it contracts, which makes the piston rod difficult to be pushed and contracted, the negative pressure generating chamber is provided with a pressure relief hole connected to the outside world near the middle position, and the head root of the piston rod is located at the inner wall of the negative pressure generating chamber with a gap, and the gap covers the pressure relief hole. At this time, no matter whether the piston rod is extended or contracted, no negative pressure or an air cavity that is difficult to compress will be generated in the middle part, thereby reducing the force required for the piston rod to extend and retract.

[0025] Preferably, to improve the sealing effect, sealing rings are sleeved on the circumferences of the head and tail of the piston rod, and the pressure relief hole is located between the sealing rings at the head and tail.

[0026] Preferably, the elastic member is a spring, which is compressively arranged at the rear end of the negative pressure generating cavity.

[0027] Preferably, to reduce the forming difficulty of components, the negative pressure generating cavity is arranged closely around the outer circumference of the water passing cavity, or, to reduce the size, the negative pressure generating cavity is arranged inside the water passing cavity, and the front end of the negative pressure generating cavity faces the water inlet channel.

[0028] As can be seen from the above description of the present invention, the present invention has the following beneficial effects:

[0029] The instant - off water outlet structure provided by the present invention adopts a sealing member independent of the water outlet channel, and the sealing member is provided with an elastic trumpet - shaped sealing end, which can block the water outlet channel in the water - stopped state, and utilize the water pressure to bend the trumpet - shaped sealing end in the water - passing state to realize the connection of the water outlet channel, that is, it can achieve the effect of instant water shut - off.

[0030] The present invention sets the elastic performance on an independent sealing member, which can avoid increasing the structural complexity and forming difficulty of the water outlet channel and its main body (water outlet panel), can also improve the strength and service life of the water outlet channel. At the same time, each sealing member can be independently set, so that when an individual sealing member is damaged, it can be independently replaced, reducing the production cost and maintenance cost.

[0031] By setting the mounting seat, the installation of the sealing member is realized outside the water outlet channel, reducing the installation difficulty of the sealing member.

[0032] A water flow structure is set to make the water flow direction as much as possible towards the trumpet - shaped sealing end, so that even in the case of small water flow, the water passing gap can still be opened.

[0033] One water outlet channel is equipped with multiple water outlets, which can reduce the number of instant - off water outlet structures arranged in the water outlet device, thereby streamlining the water outlet structure of the water outlet device and reducing its production cost and assembly complexity.

[0034] The present invention also sets an elastic piston rod, which can be pushed under the action of water pressure to absorb the water pressure, and when the water is stopped, a negative pressure is formed by resetting, which can form a certain adsorption force on the water in the water passing channel.

[0035] Combining the structure that forms negative pressure on the piston rod with the seal, for the seal, it can reduce the pressing force of the residual water on the trumpet-shaped sealing end, shorten the time for the trumpet-shaped sealing end to restore its sealing performance, and accelerate the response speed of the water outlet device not to drip water after the water supply stops. Additionally, for the residual water, through the formed negative pressure space, on the one hand, it can absorb the water that enters the water passage instantaneously when the water supply stops, reducing the amount of water flowing out from the water outlet nozzle. On the other hand, it can also absorb the potential energy of the water that surges into the water passage instantaneously when the water supply stops, further reducing the acting force of the water on the trumpet-shaped sealing end, thereby further strengthening the sealing performance of the trumpet-shaped sealing end. Thus, the following technical effects can be achieved: a. Achieve the technical effect of immediate shut-off and stop, with a fast response speed and a good user experience; b. Have a good sealing effect. Even if the water outlet device is touched or due to the vibration of the pipeline, it is not easy to damage its internal sealing state and is not likely to drip water due to shaking; c. Have a good sealing effect. It will not, over time, be damaged by the influx of some small bubbles and cause its balance state to be disrupted, resulting in a situation where the residual water suddenly appears and all drips down suddenly;

[0036] The two ends of the piston rod have different sizes. During the reset and movement of the piston rod, the volume of the cavity formed by the movement of the tail of the piston rod is larger than the volume of the water pushed into the water passage by the movement of the head. At this time, the volume difference forms negative pressure, and the larger the difference, the greater the negative pressure;

[0037] The negative pressure generating cavity is provided with a pressure relief hole communicating with the outside near the middle position to prevent the formation of negative pressure in the middle when the piston rod contracts, which may cause the problem that the piston rod is difficult to be pushed and contracted; Description of the Drawings

[0038] The drawings described herein are used to provide a further understanding of the present invention, form a part of the present invention, and the schematic embodiments and descriptions thereof are used to explain the present invention without unduly limiting the present invention.

[0039] Among them:

[0040] Figure 1 is a water flow schematic diagram of an immediate shut-off and stop water outlet structure Figure 1 ;

[0041] Figure 2 is a water supply stop schematic diagram of an immediate shut-off and stop water outlet structure Figure 1 ;

[0042] Figure 3 is an explosion diagram of an immediate shut-off and stop water outlet structure Figure 1 ;

[0043] Figure 4 is an explosion diagram of an immediate shut-off and stop water outlet structure Figure 2 ;

[0044] Figure 5 Partial schematic of an on - off - instant - stop water outlet structure Figure 1 ; (at point A of Figure 4 )

[0045] Figure 6 Schematic of the sealing part in the water - passing state Figure 1 ;

[0046] Figure 7 Schematic of the sealing part in the water - stopped state Figure 1 ;

[0047] Figure 8 Schematic of water passing through an on - off - instant - stop water outlet structure Figure 2 ;

[0048] Figure 9 Schematic of water stopping in an on - off - instant - stop water outlet structure Figure 2 ;

[0049] Figure 10 Explosion diagram of an on - off - instant - stop water outlet structure Figure 3 ;

[0050] Figure 11 Explosion diagram of an on - off - instant - stop water outlet structure Figure 4 ;

[0051] Figure 12 Partial schematic of an on - off - instant - stop water outlet structure Figure 2 ; (at point B of Figure 11 )

[0052] Figure 13 Schematic of the sealing part in the water - passing state Figure 2 ;

[0053] Figure 14 Schematic of the sealing part in the water - stopped state Figure 2 ;

[0054] Figures 1 to 14 The markings in it are respectively: water outlet channel 1, water inlet 11, conical surface 111, water outlet nozzle 12, water outlet 121, sealing part 2, trumpet - shaped sealing end 21, mounting head 22, limiting hole 23, mounting seat 3, communication hole 31, mounting hole 32, annular groove 33, water - passing cavity 4, water inlet channel 41, water - passing channel 42, negative - pressure generating cavity 5, front end 51, pressure - relief hole 53, rear end 52, piston rod 6, head 61, elastic part 7. Detailed implementation method

[0055] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0056] Please refer to Figures 1 to 14 , a water outlet structure that shuts off and stops immediately, including a water outlet channel 1, a seal 2, a water passing cavity 4, a negative pressure generating cavity 5, a piston rod 6 and an elastic member 7. Among them,

[0057] One end of the water outlet channel 1 is provided with a water inlet 11, and the other end is provided with a water outlet 121, through which water can flow.

[0058] In one embodiment, the water outlet end of the water outlet channel 1 forms a water outlet nozzle 12, and the water outlet 121 is arranged at the end of the water outlet nozzle 12. Preferably, the water outlet nozzle 12 is provided with a plurality of water outlets 121, so as to reduce the number of water outlet structures that shut off and stop immediately in the water outlet device.

[0059] The seal 2 is installed at the water inlet 11 of the water outlet channel 1 and is provided with a trumpet-shaped sealing end 21 extending into the water outlet channel 1. The trumpet-shaped sealing end 21 has elasticity and can open or block the water outlet channel 1, so as to realize water passing and water cut-off.

[0060] The water passing cavity 4 is provided with a water inlet channel 41 and a water passing channel 42, and the water passing channel 42 communicates with the water inlet 11 of the water outlet channel 1.

[0061] One end of the negative pressure generating cavity 5 is the front end 51, which communicates with the water inlet channel 41, and the other end is the rear end 52, which communicates with the water passing channel 42. In this embodiment, in order to reduce the forming difficulty of the components, the negative pressure generating cavity 5 is arranged closely around the outer periphery of the water passing cavity 4.

[0062] The piston rod 6 is telescopically inserted into the negative pressure generating cavity 5. The elastic member 7 is arranged between the negative pressure generating cavity 5 and the piston rod 6 and pushes the piston rod 6 to extend out from the front end 51 of the pressure generating cavity to block the water inlet channel 41 and the water passing channel 42. Preferably, the elastic member 7 is a spring, which is compressively arranged at the rear end 52 of the negative pressure generating cavity 5.

[0063] In the water inlet state of the water shut-off and stop structure provided by the present utility model, the piston rod 6 is pushed and contracted by the water inlet hydraulic pressure of the water inlet channel 41. At this time, the water inlet channel 41 and the water passing channel 42 are communicated, water flows in, the trumpet-shaped sealing end 21 is bent under the action of the water flow, the edge of the trumpet-shaped sealing end 21 is separated from the inner wall of the water outlet channel 1, and a water passing gap is formed. The water outlet channel 1 is in a communicating state and water flows out.

[0064] In the water-stop state, the piston rod 6 resets and blocks the water inlet channel 41 and the water flow channel 42. During the resetting process, the end of the piston rod 6 gradually moves away from the rear end 52 of the negative pressure generating chamber 5, forming a negative pressure acting on the rear end 52 of the negative pressure generating chamber 5 and the water flow channel 42. At this time, the edge of the trumpet-shaped sealing end 21 returns to and fits the inner wall of the water outlet channel 1, and the water outlet channel 1 is in a blocked state, which can achieve an instant stop effect.

[0065] In one embodiment, the sealing member 2 is installed at the water inlet 11 of the water outlet channel 1 via a mounting seat 3 , thereby reducing the difficulty of installing the sealing member 2 .

[0066] On the basis of the above embodiment, regarding the mounting base 3, in one embodiment, please refer to Figures 1 to 7 The mounting base 3 is in the shape of a bracket, mounted at the water inlet 11 of the water outlet channel 1, and is provided with a communication hole 31 that allows access to the water inlet 11 of the water outlet channel 1. Preferably, to improve the uniformity of hydraulic pressure on the sealing member 2, the communication holes 31 are multiple and evenly distributed around the axis of the water outlet channel 1. The communication holes 31 are all directed toward the trumpet-shaped sealing end 21, allowing the water flow to positively impact the trumpet-shaped sealing end 21. Even when the water flow is low, the water flow gap can still be opened.

[0067] In another embodiment, see Figures 8 to 14 The mounting seat 3 is cylindrical and is spaced from and mounted opposite to the water inlet 11 of the water outlet channel 1. Preferably, the mounting seat 3 is coaxial with the water outlet channel 1 and extends into the water outlet channel 1. An annular communication hole 31 is formed between the periphery of the mounting seat 3 and the inner wall of the water outlet channel 1. The communication hole 31 faces the trumpet-shaped sealing end 21, allowing water flow to positively impact the trumpet-shaped sealing end 21. Even when the water flow is low, the water flow gap can still be opened.

[0068] Regarding the mounting method between the mounting base 3 and the seal 2, in one embodiment, the mounting base 3 is provided with a mounting hole 32, and the seal 2 is provided with a mounting head 22 in the middle. The mounting head 22 is inserted into the mounting hole 32, and the end of the mounting head 22 is provided with an undercut, resulting in a simple structure and easy assembly. Alternatively, in another embodiment, the mounting base 3 is provided with an annular groove 33, and the seal 2 is provided with a limiting hole 23 in the middle. The sealing member 2 is fitted over the annular groove 33 of the mounting base 3 through the limiting hole 23, resulting in a simple structure and easy assembly.

[0069] In addition, in order to improve the utilization rate of water power, in one embodiment, the edge of the water inlet 11 of the water outlet channel 1 is chamfered to form a conical surface 111 pointing to the trumpet-shaped sealing end 21, so that the water flow can impact the trumpet-shaped sealing end 21 as positively as possible, and even when the water flow is small, the water flow gap can still be opened.

[0070] Based on the above embodiments, regarding the structure of the piston rod 6, in one embodiment, a section of the piston rod 6 facing the rear end 52 of the negative pressure generating chamber 5 is the tail, and a section facing the front end 51 of the negative pressure generating chamber 5 is the head 61. To achieve a greater negative pressure effect, the diameter of the tail is greater than that of the head 61. Correspondingly, the diameter of the end of the negative pressure generating chamber 5 connected to the water passing channel 42 is greater than the diameter of the end connected to the water inlet channel 41. During the reset and movement of the piston rod 6, the volume of the cavity formed by the movement of the tail of the piston rod 6 is greater than the volume of the water pushed into the water passing channel 42 by the movement of the head 61. At this time, the difference between the two volumes forms a negative pressure, and the greater the difference, the greater the negative pressure.

[0071] In addition, to prevent the formation of negative pressure in the middle of the piston rod 6 during contraction, causing the problem that the piston rod 6 is difficult to be pushed and contracted, a pressure relief hole 53 communicating with the outside is provided at a position near the middle of the negative pressure generating chamber 5. There is a gap between the head 61 of the piston rod 6 and the inner wall of the negative pressure generating chamber 5, and the gap covers the pressure relief hole 53. At this time, whether the piston rod 6 extends or contracts, no negative pressure or a gas chamber that is difficult to be compressed will be generated in the middle, reducing the force required for the piston rod 6 to expand and contract. Preferably, to improve the sealing effect, sealing rings are sleeved on the circumferences of the head 61 and the tail of the piston rod 6, and the pressure relief hole 53 is located between the sealing rings of the head 61 and the tail.

[0072] The instant-on-and-off water outlet structure provided by the present utility model adopts a sealing member 2 independent of the water outlet channel 1, and the sealing member 2 is provided with an elastic trumpet-shaped sealing end 21, which can block the water outlet channel 1 in the water shut-off state, and utilize the water pressure to bend the trumpet-shaped sealing end 21 in the water passing state to realize the connection of the water outlet channel 1, that is, the effect of instant water shut-off can be achieved. At the same time, setting the elastic performance on the independent sealing member 2 can avoid increasing the structural complexity and molding difficulty of the water outlet channel 1 and its main body (water outlet panel), and can also improve the strength and service life of the water outlet channel 1. At the same time, the sealing members 2 can be independently arranged, so that when an individual sealing member 2 is damaged, it can be independently replaced, reducing the production cost and maintenance cost.

[0073] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. 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 therefore should not be construed as a limitation to the present utility model.

[0074] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0075] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0076] In the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0077] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0078] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present utility model. Any changes, modifications, substitutions and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present utility model.

Claims

1. An instant-off and instant-stop water outlet structure, characterized in that It includes a water outlet channel, a seal, a water passing cavity, a negative pressure generating cavity, a piston rod and an elastic member; One end of the water outlet channel is provided with a water inlet, and the other end is provided with a water outlet; The seal is installed at the water inlet of the water outlet channel and is provided with a flared sealing end extending into the water outlet channel; the flared sealing end has elasticity: The water passing cavity is provided with a water inlet channel and a water passing channel, and the water passing channel communicates with the water inlet of the water outlet channel; One end of the negative pressure generating cavity is the front end, which communicates with the water inlet channel, and the other end is the rear end, which communicates with the water passing channel; The piston rod is telescopically inserted into the negative pressure generating cavity; The elastic member is arranged between the negative pressure generating cavity and the piston rod and pushes the piston rod to extend out from the front end of the pressure generating cavity to block the water inlet channel and the water passing channel; In the water inlet state, the piston rod is pushed to contract by the water inlet hydraulic pressure of the water inlet channel, the water inlet channel and the water passing channel are communicated, the flared sealing end is bent under the action of water flow, the edge of the flared sealing end is separated from the inner wall of the water outlet channel, and a water passing gap is formed, and the water outlet channel is in a communicated state; In the water cut-off state, the piston rod resets and blocks the water inlet channel and the water passing channel. During the reset process of the piston rod, the end gradually moves away from the rear end of the negative pressure generating cavity, forming a negative pressure acting on the rear end of the negative pressure generating cavity and the water passing channel. The edge of the flared sealing end returns and fits the inner wall of the water outlet channel, and the water outlet channel is in a blocked state.

2. The instant-off and instant-stop water outlet structure according to claim 1, wherein, The seal is installed at the water inlet of the water outlet channel through a mounting seat.

3. The instant-off and instant-stop water outlet structure according to claim 2, characterized in that, The mounting seat is in a bracket shape, is erected at the water inlet of the water outlet channel, and is provided with a communication hole for the water inlet of the water outlet channel; there are multiple communication holes, which are evenly distributed around the axis of the water outlet channel and all face the flared sealing end.

4. The instant-off and instant-stop water outlet structure according to claim 2, wherein, The mounting seat is columnar and is installed at an interval and opposite to the water inlet of the water outlet channel.

5. The instant-off and instant-stop water outlet structure according to claim 4, wherein The mounting seat is coaxial with the water outlet channel and extends into the water outlet channel. An annular communication hole is formed between the circumference of the mounting seat and the inner wall of the water outlet channel, and the communication hole faces the flared sealing end.

6. The instant-off water outlet structure according to claim 2, characterized in that, The mounting seat is provided with a mounting hole, the middle of the seal is provided with a mounting head, the mounting head is inserted into the mounting hole, and an anti-dumping is provided at the end of the mounting head; or, the mounting seat is provided with an annular groove, the middle of the seal is provided with a limiting hole, and is sleeved on the annular groove of the mounting seat through the limiting hole.

7. The instant-off and instant-stop water outlet structure according to claim 1, wherein, The edge of the water inlet of the water outlet channel is chamfered to form a conical surface pointing to the flared sealing end.

8. The instant-off and instant-stop water outlet structure according to claim 1, wherein The water outlet end of the water outlet channel forms a water outlet nozzle, the water outlet is arranged at the end of the water outlet nozzle, and the water outlet nozzle is provided with multiple water outlets.

9. The on-off and immediate-stop water outlet structure according to claim 1, wherein A section of the piston rod facing the rear end of the negative pressure generating chamber is the tail, and a section facing the front end of the negative pressure generating chamber is the head. The diameter of the tail is larger than that of the head. Correspondingly, the diameter of the end of the negative pressure generating chamber connected to the water passing channel is larger than the diameter of the end connected to the water inlet channel. A pressure relief hole communicating with the outside is provided at a position near the middle of the negative pressure generating chamber. There is a gap between the root of the head of the piston rod and the inner wall of the negative pressure generating chamber, and the gap covers the pressure relief hole. Sealing rings are sleeved on the circumferences of the head and the tail of the piston rod, and the pressure relief hole is located between the sealing rings of the head and the tail.

10. The instant-off and instant-stop water outlet structure according to claim 1, wherein The elastic member is a spring, which is compressively arranged at the rear end of the negative pressure generating chamber. The negative pressure generating chamber is arranged closely around the outer circumference of the water passing chamber, or the negative pressure generating chamber is arranged inside the water passing chamber, and the front end of the negative pressure generating chamber faces the water inlet channel.

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