Anti-explosion time-delay valve element and water outlet device

Abstract

The invention discloses an anti-explosion time-delay valve element and a water outlet device, and relates to the field of valve elements, the anti-explosion time-delay valve element comprises a main body, a valve rod, a diaphragm and a piston assembly, the diaphragm is arranged in the main body, a pressure cavity is defined by the diaphragm and the main body, a drainage port is communicated with the pressure cavity and the outside, the diaphragm comprises an elastically deformable center ring part and a mounting hole, and the piston assembly comprises an elastic supporting piece and a piston. The piston comprises a water supplementing channel communicating the pressure cavity with the water inlet and a flow guide groove communicating the pressure cavity with the water outlet, the piston is arranged in the mounting hole in a penetrating mode, and the elastic supporting piece is arranged on the side, located outside the pressure cavity, of the piston so as to provide elastic force for the center ring part, so that the end, located in the pressure cavity, of the flow guide groove is sealed by the center ring part; when the pressure at the pressure cavity or the water inlet is increased, the central ring part relieves the sealing of the diversion trench, so that no matter the valve core has abnormal high pressure in the pressure cavity or the water inlet, the diversion trench can be in a conducting state, water in the pressure cavity is automatically and timely discharged, and the valve core is prevented from bursting.

Description

Technical Field

[0001] The invention relates to the field of valve cores, and in particular to an explosion-proof time-delay valve core and a water outlet device. Background Art

[0002] The time-delay valve core is a common water outlet control module for many water outlet devices such as faucets and toilets. It can be used to control the on-off time of water flow and water outlet conditions. However, when it encounters flow blockage, cold ice or hydraulic shock (water hammer effect), the valve core is prone to bursting due to excessive hydraulic pressure, causing damage, affecting user experience and even user safety. Summary of the invention

[0003] The present invention provides an explosion-proof time-delay valve core and a water outlet device, aiming to solve the technical problem in the prior art that the time-delay valve core is prone to bursting and damage when the hydraulic pressure is too high.

[0004] To achieve the above-mentioned purpose, a first aspect of the present invention provides an explosion-proof time-delay valve core, comprising: The main body includes a water inlet, a water outlet and a spillway; A valve stem is inserted into the drain port to control the opening and closing of the drain port; A diaphragm is disposed in the main body and encloses a pressure chamber with the main body, the drain port connects the pressure chamber with the outside, and the diaphragm includes a mounting hole enclosed by an elastically deformable central ring portion; A piston assembly includes an elastic support member and a piston for controlling the on and off of the water inlet, the piston including a water replenishment channel connecting the pressure chamber and the water inlet, and a guide groove connecting the pressure chamber and the water outlet, the piston is inserted into the mounting hole, the elastic support member is arranged on a side of the piston outside the pressure chamber to provide elastic force to the central ring portion so that one end of the guide groove located in the pressure chamber is sealed by the central ring portion, and when the pressure in the pressure chamber or the water inlet increases, the central ring portion releases the seal on the guide groove.

[0005] According to the explosion-proof time-delay valve core provided by the embodiment of the first aspect of the present invention, by providing a guide groove on the outer wall of the piston, when the valve core encounters abnormally high pressure during use, part of the water flow in the pressure chamber can be discharged in time. In addition, through the cooperation between the central ring portion on the diaphragm and the elastic support member, whether the valve core has abnormally high pressure in the pressure chamber or at the water inlet, the guide groove can be in a conducting state, and the water in the pressure chamber can be automatically and timely discharged to avoid the valve core from bursting.

[0006] According to some embodiments of the present invention, the piston includes a cylinder portion, the cylinder portion is inserted into the mounting hole, and the guide groove is arranged on the outer peripheral wall of the cylinder portion.

[0007] According to some embodiments of the present invention, a limiting member is provided on one side of the cylinder portion located in the pressure chamber, the center ring portion and the guide groove are both provided on the side of the limiting member close to the diaphragm, and the elastic support member provides elastic force to the center ring portion so that the center ring portion abuts against the limiting member to seal one end of the guide groove.

[0008] According to some embodiments of the present invention, the limiting member includes a buckle ring, and a buckle ring groove for installing the buckle ring is provided on one side of the cylinder portion located at the pressure chamber.

[0009] According to some embodiments of the present invention, the piston also includes a plug, which is connected to one end of the barrel near the water inlet, and the outer diameter of the plug is larger than the outer diameter of the barrel. One end of the elastic support member abuts the center ring portion, and the other end abuts the plug.

[0010] According to some embodiments of the present invention, the elastic support member includes a first elastic member and a sliding base, wherein one end of the sliding base abuts against the center ring portion, and the other end abuts against the first elastic member, and the end of the first elastic member facing away from the sliding base abuts against the plug.

[0011] According to some embodiments of the present invention, a leakage channel is further included, wherein the leakage channel connects the pressure chamber and the outside.

[0012] According to some embodiments of the present invention, an adjusting member is further included, and the adjusting member can be movably disposed in the water replenishment channel to change the water flow cross-sectional area of ​​the water replenishment channel.

[0013] According to some embodiments of the present invention, a third elastic member is further included in the pressure chamber, one end of the third elastic member abuts against the inner wall of the pressure chamber, and the other end of the third elastic member abuts against the central ring portion.

[0014] A second aspect of the present invention provides a water outlet device, including: the above-mentioned explosion-proof delay valve core.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 The overall schematic diagram of the explosion-proof time-delay valve core provided by the embodiment of the present invention is shown; Figure 2 The exploded schematic diagram of the explosion-proof time-delay valve core provided by the embodiment of the present invention is shown; Figure 3 It shows a schematic structural diagram of the explosion-proof time-delay valve core closed state provided by an embodiment of the present invention; Figure 4 It shows a schematic structural diagram of the explosion-proof time-delay valve core opening state provided by an embodiment of the present invention; Figure 5 A partial enlarged schematic diagram of an explosion-proof time-delay valve core provided in an embodiment of the present invention is shown; Figure 6 A schematic structural diagram of a third housing provided by an embodiment of the present invention is shown; Figure 7 A schematic structural diagram of a second housing provided by an embodiment of the present invention is shown; Figure 8 A schematic diagram showing the structure of a diaphragm provided by an embodiment of the present invention is shown; Fig. 9 A schematic diagram of the structure of a piston provided by an embodiment of the present invention is shown; Fig.10 A schematic diagram of the structure of a piston provided by an embodiment of the present invention is shown; Fig.11 A schematic diagram of the structure of an adjusting member provided in an embodiment of the present invention is shown; Reference numerals: 1000, explosion-proof delay valve core; 100, main body; 110, first housing; 111, valve stem sliding chamber; 112, through hole; 113, second elastic member; 114, drain port; 120, second housing; 121, water inlet; 122, water outlet; 123, slideway; 130, third housing; 131, drain port; 132, drain channel; 140, pressure chamber; 200, diaphragm; 210, center ring; 220, mounting hole; 300, piston assembly; 310, barrel; 311, guide groove; 312, water replenishment channel; 3121, first water replenishment section; 3122, second water replenishment section; 3123, third water replenishment section; 313, stopper; 3131, buckle; 3132, buckle groove; 320, plug; 321, convex rib; 330, elastic support; 331, first elastic member; 332, sliding base; 340, adjustment member; 341, adjustment head; 342, piston rod; 350, filter; 360, third elastic member; 400, valve stem; 500. Valve stem sleeve. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] refer to Figure 1 In some specific embodiments of the present invention, an explosion-proof time-delay valve core 1000 is provided, which can be set in water outlet devices such as faucets and toilets, and can control the water outlet time and water outlet conditions to avoid the situation where the closing speed is too fast and the water volume is too small or the water flows for a long time. When the inside or outside of the valve core is frozen due to extreme low temperature, blocked or pressurized, or subjected to hydraulic shock, the internal pressure of the valve core can be released in time to avoid explosion, thereby ensuring the user experience and safety performance.

[0019] refer to Figure 1-10 The explosion-proof time-delay valve core 1000 provided in the embodiment of the present invention includes a main body 100 , a valve stem 400 , a diaphragm 200 and a piston assembly 300 .

[0020] Specifically, the main body 100 is composed of a first shell 110, a second shell 120 and a third shell 130. A slide 123 is provided on the second shell 120. The first shell 110 and the second shell 120 fix the third shell 130 therebetween. The diaphragm 200 is arranged in the main body 100, and the edge of the diaphragm 200 is clamped between the second shell 120 and the third shell 130. The pressure chamber 140 is enclosed between the diaphragm 200 and the third shell 130. Since only the edge of the diaphragm 200 is fixed, other parts of the diaphragm 200 can move in the slide 123 of the second shell 120 to change the volume of the pressure chamber 140. The water inlet 121 and the water outlet 122 are both arranged on the second shell 120 for water to flow. The third shell 130 is provided with a drain port 131 connecting the pressure chamber 140 and the outside, so that the water in the pressure chamber 140 can flow out to change the water pressure in the pressure chamber 140. The first shell 110 is provided with a through hole 112, and the valve stem 400 can be inserted through the through hole 112 and slidably set in the drain port 131 to open or close the drain port 131.

[0021] Furthermore, a valve stem sliding chamber 111 is also provided on the first housing 110, and the valve stem 400 enters the through hole 112, passes through the valve stem sliding chamber 111, and then penetrates into the drain port 131 for blocking. In addition, a second elastic member 113 is provided in the valve stem sliding chamber 111, which may be a spring, etc., and the two ends of the second elastic member 113 abut between the valve stem 400 and the second housing 120 to provide the valve stem 400 with an elastic force opposite to the pressing direction, so that the valve stem 400 can reset itself after being pressed. In addition, a valve stem sleeve 500 is also provided on the first housing 110, and the valve stem sleeve 500 passes through the through hole 112 and is then covered on the valve stem 400 for the user to press.

[0022] The middle of the diaphragm 200 is provided with a mounting hole 220 surrounded by an elastically deformable central ring portion 210 , wherein the thickness of the central ring portion 210 along the moving direction of the diaphragm 200 can be set to be greater than the thickness of other parts of the diaphragm 200 .

[0023] The piston assembly 300 includes an elastic support member 330 and a piston, and the piston is movably disposed in the second housing 120 to control the on and off of the water inlet 121. The piston is provided with a water replenishment channel 312 connecting the pressure chamber 140 and the water inlet 121, and the outer wall of the piston is provided with a guide groove 311 connecting the pressure chamber 140 and the water outlet 122. In addition, one end of the piston is inserted into the mounting hole 220 of the diaphragm 200 so that a part of the piston enters the pressure chamber 140. An elastic support member 330 is provided on the side of the piston facing away from the pressure chamber 140. Specifically, the piston penetrates into the elastic support member 330, one end of the elastic support member 330 abuts against a supportable portion on the piston or a supportable portion in the main body, and the other end pushes against the center ring portion 210 to provide an elastic force pointing to the pressure chamber 140 to the center ring portion 210. At this time, the center ring portion 210 is subjected to the elastic force and seals one end of the guide groove 311 located in the pressure chamber 140. When the pressure in the pressure chamber 140 or the water inlet 121 increases, the center ring portion 210 can release the seal on the guide groove 311, so that the guide groove 311 connects the pressure chamber 140 and the water outlet 122, so that the water flow in the pressure chamber 140 can flow out along the guide groove 311 to release the pressure.

[0024] The working principle and process of the explosion-proof time-delay valve core 1000 provided in this embodiment are further described below: When the valve stem 400 does not move (blocking the drain port 131), the water pressure in the pressure chamber 140 is the same as the water pressure at the water inlet 121. At this time, the piston blocks the water inlet 121, and no water flows out of the water outlet 122. When the valve stem 400 is pressed, the drain port 131 is opened. Since the drain port 131 connects the pressure chamber 140 with the outside (atmospheric pressure), at this time, since the water pressure in the pressure chamber 140 is greater than the atmospheric pressure, the water in the pressure chamber 140 is discharged through the drain port 131, and the pressure in the pressure chamber 140 is reduced to less than the pressure of the water inlet 121. At this time, the piston is pushed open by the pressure of the water inlet 121, and the water inlet 121 and the water outlet 122 are connected to achieve water discharge. When the pressing force on the valve stem 400 is removed, the valve stem 400 is reset by the elastic force of the second elastic member 113 and blocks the drain port 131. At this time, the water inlet 121 is still in an open state, but since the water pressure in the pressure chamber 140 is relatively low, a portion of the water flow from the water inlet 121 will enter the pressure chamber 140 through the water replenishment channel 312, causing the pressure in the pressure chamber 140 to gradually increase until it is the same as the water inlet pressure. At this time, the piston is pushed by the pressure in the pressure chamber 140 to close the water inlet 121, thereby completing the opening and closing of the delayed valve core.

[0025] When there is no abnormality in the pressure at the water inlet 121 of the valve core and the pressure chamber 140, the central ring portion 210 of the diaphragm 200 moves upward under the elastic force of the elastic support member 330 until one end of the guide groove 311 in the pressure chamber 140 is sealed, so that the water in the pressure chamber 140 cannot flow out through the guide groove 311, thereby balancing the pressure in the valve core.

[0026] When the pressure in the pressure chamber 140 increases abnormally, such as when the volume gradually increases due to low-temperature freezing, the ice-water mixture in the pressure chamber 140 with a gradually increasing volume will generate pressure on the diaphragm 200, thereby causing the central ring portion 210 to release the seal on the guide groove 311, allowing the guide groove 311 to connect the pressure chamber 140 and the water outlet 122, so that part of the water flow in the pressure chamber 140 is discharged, reducing the pressure in the pressure chamber 140 and avoiding explosion.

[0027] It should be noted that there are many situations in which the central ring portion 210 releases the seal of the guide groove 311, such as: When the force F1 required for the center ring portion 210 to be squeezed and deformed is less than the force F2 required for the elastic support member 330 to be elastically deformed, the pressure in the pressure chamber 140 will first reach F1 during the rising process. At this time, the elastic support member 330 will not be deformed, and the position of the center ring portion 210 will not change, but it will be compressed and deformed (thinned). At this time, one end of the guide groove 311 is exposed to connect with the pressure chamber 140, and the sealing state is released; When the force F1 required for the center ring portion 210 to be squeezed and deformed is greater than the force F2 required for the elastic support member 330 to be elastically deformed, the pressure in the pressure chamber 140 will first reach F2 during the rising process. At this time, the elastic support member 330 is compressed, and the center ring portion 210 will not be compressed and deformed, but will move in the compression direction with the compression of the elastic support member 330, and one end of the guide groove 311 will be exposed, thereby releasing the sealing state; It is understandable that when the force F1 required for the center ring portion 210 to be squeezed and deformed is equal to the force F2 required for the elastic support member 330 to be elastically deformed, the elastic support member 330 is compressed and the center ring portion 210 is deformed simultaneously to reveal the guide groove 311 .

[0028] When the pressure at the water inlet 121 (water source) rises abnormally, such as when ice or water hammer occurs, the elastic support member 330 is affected by the high pressure at the water inlet 121 and further applies force to the center ring portion 210. Pushed by the elastic support member 330, the center ring portion 210 also applies force to the water in the pressure chamber 140. Since the drain port 131 is blocked and the water in the pressure chamber 140 is incompressible, the center ring portion 210 is also subjected to the reaction force of the water in the pressure chamber 140. The center ring portion 210 will be compressed (thinned) in the direction away from the pressure chamber 140 under the reaction force of the water in the pressure chamber 140, thereby exposing one end of the guide groove 311 and releasing the sealing state.

[0029] According to the explosion-proof time-delay valve core 1000 provided by some specific embodiments of the present invention, by providing a guide groove 311 on the outer wall of the piston, when the valve core encounters abnormally high pressure during use, part of the water flow in the pressure chamber 140 can be promptly discharged. In addition, through the cooperation between the central ring portion 210 on the diaphragm 200 and the elastic support member 330, whether the valve core is in the pressure chamber 140 or at the water inlet 121, the guide groove 311 can be in a conducting state, and the water in the pressure chamber 140 can be automatically and promptly discharged to prevent the valve core from bursting.

[0030] refer to Figure 3 , Figure 5 , Fig. 9 and Fig.10 In some embodiments of the present invention, the piston includes a cylinder portion 310 , and a portion of the cylinder portion 310 is inserted into the mounting hole 220 , and the guide groove 311 is disposed on the outer peripheral wall of the cylinder portion 310 .

[0031] refer to Figure 3 , Figure 5 and Fig. 9In some embodiments of the present invention, a limiting member 313 is provided on one side of the cylinder 310 located in the pressure chamber 140. The central ring 210 and the guide groove 311 are both provided on the side of the limiting member 313 close to the diaphragm 200. At this time, the central ring 210 is equivalent to being clamped between the limiting member 313 and the elastic support member 330. The elastic support member 330 provides elastic force to the central ring 210. The central ring 210 abuts against the limiting member 313 under the action of the elastic force. At this time, the central ring 210 isolates the guide groove 311 from the pressure chamber 140, so that one end of the guide groove 311 is in a sealed state.

[0032] It is understandable that the limit member 313 can be in various forms. It can be achieved by fixing other components on the barrel 310, or it can be an annular rib integrally formed on the barrel 310, or it can be the shape of the barrel 310 itself to limit the center ring 210. For example, the outer peripheral wall of the barrel 310 is set to a shape similar to an inverted triangle with an outer diameter that gradually decreases in the direction away from the pressure chamber 140, and the position of the center ring 210 is limited by the upper portion with a larger outer diameter.

[0033] refer to Figure 2 , Figure 3 and Fig. 9 In some specific embodiments of the present invention, the limiting member 313 includes a retaining ring 3131, and a retaining ring groove 3132 is provided on one side of the cylinder portion 310 of the piston located at the pressure chamber 140. The retaining ring 3131 can be snapped into the retaining ring groove 3132 to achieve positioning, so as to realize the limiting function.

[0034] refer to Figure 3 and Fig. 9 In some specific embodiments of the present invention, the piston further includes a plug 320, which is connected to one end of the barrel 310 close to the water inlet 121. When the piston moves in a direction away from the pressure chamber 140, the plug 320 can block the water inlet 121 to close the water flow. The outer diameter of the plug 320 is larger than that of the barrel 310, and one end of the elastic support member 330 abuts against the central ring 210, and the other end can abut against the surface of the plug 320, thereby realizing the positioning and support of the elastic support member 330.

[0035] It is understandable that the outer diameter of the plug 320 may be equal to or smaller than the outer diameter of the barrel 310, as long as the water inlet 121 can be blocked. At this time, a protruding annular rib may be provided on the outer wall of the barrel 310 outside the pressure chamber 140 to provide abutment fulcrum for the elastic support member 330.

[0036] refer to Figure 2 , Figure 3 and Figure 5In some specific embodiments of the present invention, the elastic support member 330 includes a first elastic member 331 and a sliding base 332. The cylinder 310 is slidably disposed in the first elastic member 331 and the sliding base 332. One end of the sliding base 332 abuts against the central ring 210, and the other end abuts against the first elastic member 331. The end of the first elastic member 331 facing away from the sliding base 332 abuts against the plug 320. Thus, the first elastic member 331 provides elastic force to the sliding base 332, so that the sliding base 332 supports the central ring 210. Moreover, through the contact between the sliding base 332 and the central ring 210, the force exerted on the central ring 210 can be made more uniform, so as to avoid the movement of the diaphragm 200 being skewed due to the small contact area between the two when the first elastic member 331 directly pushes the central ring 210.

[0037] Furthermore, the sliding base 332 is slidably disposed in the slideway 123 , thereby limiting the sliding base 332 to move only along the elastic direction of the first elastic member 331 , further preventing the diaphragm 200 from moving crookedly.

[0038] It is understandable that the first elastic member 331 can be configured as a spring, a disc spring or other elastic components of various types, which is not limited here.

[0039] refer to Figure 1 , Figure 3 and Figure 6 In some specific embodiments of the present invention, a leakage channel 132 is further provided on the third housing 130, and a drain port 114 communicating with the outside is provided on the first housing 110, and the leakage channel 132 communicates the pressure chamber 140 with the outside. Specifically, the leakage channel 132 is communicated with the pressure chamber 140 through the leakage port 131, and the other end is communicated with the outside through the drain port 114. Thus, when the valve stem 400 is pressed, the leakage port 131 is opened, and the water flow of the pressure chamber 140 can enter the leakage channel 132 through the leakage port 131, and be discharged through the drain port 114, thereby reducing the water pressure in the pressure chamber 140 to open the piston.

[0040] refer to Figure 3 , Fig.10 and Fig.11 In some specific embodiments of the present invention, an adjusting member 340 is further included. The adjusting member 340 is movably disposed in the water replenishment channel 312. During the movement of the adjusting member 340, the water flow cross-sectional area of ​​the water replenishment channel 312 can be changed, thereby changing the time for the pressure in the pressure chamber 140 to recover and the time for the opened piston to re-seal the water inlet 121. The user can freely control the delay time of the delay valve through this adjusting member 340.

[0041] Specifically, the adjusting member 340 includes a piston rod 342, and the water replenishment channel 312 includes at least a first water replenishment section 3121 and a second water replenishment section 3122 arranged in sequence along the water replenishment direction, wherein the diameter of the first water replenishment section 3121 is smaller than the diameter of the second water replenishment section 3122, and the piston rod 342 is slidably arranged in the water replenishment channel 312. When the piston rod 342 slides from one of the first water replenishment section 3121 and the second water replenishment section 3122 to the other, the water flow area between the outer peripheral wall of the piston rod 342 and the inner wall of the water replenishment channel 312 changes.

[0042] It is understandable that the second water replenishment section 3122 can be set to a "bell-mouth" shape with a diameter that gradually increases along the water replenishment direction. At this time, when the piston rod 342 slides in the second water replenishment section 3122, the water flow cross-sectional area changes continuously, which can provide users with more delay time adjustment options.

[0043] In some specific embodiments of the present invention, the adjusting member 340 also includes an adjusting head 341 connected to the piston rod 342, and an external thread is arranged on the outer peripheral wall of the adjusting head 341. The water replenishment channel 312 is also provided with a third water replenishment section 3123, wherein an internal thread is arranged on the inner shaft wall of the third water replenishment section 3123, and the adjusting head 341 is screwed into the third water replenishment section 3123.

[0044] Thus, the user can rotate the adjustment head 341 to adjust the position of the piston rod 342 in the water replenishment channel 312, thereby changing the water flow cross-sectional area.

[0045] refer to Figure 2 and Figure 3 In some specific embodiments of the present invention, a filter screen 350 is further included. The filter screen 350 is arranged at the water inlet end of the water replenishment channel 312, so that impurities such as mud and sand in the water flow can be isolated from the water replenishment channel 312, preventing impurities from entering the water replenishment channel 312 and causing jamming between the piston rod 342 and the water replenishment channel 312, or even blocking the water replenishment channel 312.

[0046] refer to Fig. 9 In some specific embodiments of the present invention, a plurality of convex ribs 321 are arranged on the outer side of the water inlet end of the water replenishment channel 312. Specifically, the plurality of convex ribs 321 are located on the side of the plug 320 facing away from the barrel 310, and are arranged in a circular shape around the water replenishment channel 312, and the filter 350 is covered on the plurality of convex ribs 321. Thus, a water inlet channel is formed between every two adjacent convex ribs 321, which can ensure that the water flow to the water replenishment channel 312 is sufficient. refer to Figure 2 and Figure 3In some specific embodiments of the present invention, a third elastic member 360 is further included in the pressure chamber 140, and the third elastic member 360 may be a spring. Specifically, one end of the third elastic member 360 abuts against the inner wall of the pressure chamber 140, and the other end abuts against the central ring portion 210. Therefore, when the pressure chamber 140 completes pressure relief and the valve stem 400 blocks the drain port 131, the spring provides a restoring elastic force to the diaphragm 200, so that the volume of the pressure chamber 140 increases, thereby increasing the pressure difference between the water inside the pressure chamber 140 and the water inlet 121, so that the water flows into the water replenishment channel 312 more smoothly and quickly.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description of reference terms such as "some specific embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An explosion-proof time-delay valve core, characterized in that: include: The main body includes a water inlet, a water outlet and a spillway; A valve stem is inserted into the drain port to control the opening and closing of the drain port; A diaphragm is disposed in the main body and encloses a pressure chamber with the main body, the drain port connects the pressure chamber with the outside, and the diaphragm includes a mounting hole enclosed by an elastically deformable central ring portion; A piston assembly includes an elastic support member and a piston for controlling the on and off of the water inlet, the piston including a water replenishment channel connecting the pressure chamber and the water inlet, and a guide groove connecting the pressure chamber and the water outlet, the piston is inserted into the mounting hole, the elastic support member is arranged on a side of the piston outside the pressure chamber to provide elastic force to the central ring portion so that one end of the guide groove located in the pressure chamber is sealed by the central ring portion, and when the pressure in the pressure chamber or the water inlet increases, the central ring portion releases the seal on the guide groove.

2. The explosion-proof time-delay valve core according to claim 1, characterized in that: The piston comprises a cylinder portion, the cylinder portion is inserted into the mounting hole, and the guide groove is arranged on the outer peripheral wall of the cylinder portion.

3. The explosion-proof time-delay valve core according to claim 2, characterized in that: A limiting member is provided on one side of the cylinder portion located in the pressure chamber, the center ring portion and the guide groove are both provided on the side of the limiting member close to the diaphragm, and the elastic support member provides elastic force to the center ring portion so that the center ring portion abuts against the limiting member to seal one end of the guide groove.

4. The explosion-proof time-delay valve core according to claim 3, characterized in that: The limiting member comprises a buckle ring, and a buckle ring groove for installing the buckle ring is provided on one side of the cylinder portion located at the pressure chamber.

5. The explosion-proof time-delay valve core according to any one of claims 2 to 4, characterized in that: The piston also includes a plug connected to one end of the barrel near the water inlet, the outer diameter of the plug is larger than the outer diameter of the barrel, one end of the elastic support abuts the center ring, and the other end abuts the plug.

6. The explosion-proof time-delay valve core according to claim 5, characterized in that: The elastic support member includes a first elastic member and a sliding base, wherein one end of the sliding base abuts against the central ring portion, and the other end abuts against the first elastic member, and one end of the first elastic member facing away from the sliding base abuts against the plug.

7. The explosion-proof time-delay valve core according to claim 1, characterized in that: It also includes a leakage channel, which connects the pressure chamber with the outside.

8. The explosion-proof time-delay valve core according to claim 1, characterized in that: It also includes an adjusting member, which can be movably arranged in the water replenishment channel to change the water flow cross-sectional area of ​​the water replenishment channel.

9. The explosion-proof time-delay valve core according to claim 1, characterized in that: It also includes a third elastic member disposed in the pressure chamber, wherein one end of the third elastic member abuts against the inner wall of the pressure chamber, and the other end abuts against the central ring portion.

10. A water outlet device, characterized in that: It comprises an explosion-proof delay valve core as described in any one of claims 1 to 9.

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