Explosion-proof device and water outlet device using the same

Abstract

The utility model discloses a kind of explosion-proof device, and water outlet device applying the explosion-proof device, wherein, explosion-proof device includes: the inside of shell is equipped with cavity, cavity has water inlet end and water outlet end;Water-passing piece is installed in cavity, water-passing piece is used to connect water inlet end and water outlet end;Elastic assembly is elastically movably installed on water-passing piece, elastic assembly is configured to be relatively water-passing piece and move between the first position of closing water-passing piece and the second position of opening water-passing piece by the water pressure variation of water inlet end;Overall simple structure, automatic start protection, water pressure reduces and is automatically reset, the protection of water outlet device is efficient and remarkable, high compatibility, do not cause influence to surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of water-using equipment technology, and in particular to an explosion-proof device and a water outlet device using the same. Background Technology

[0002] Most existing shower heads are made of plastic and have a certain pressure limit. During use, impurities in the water can accumulate, causing some of the water outlets to become clogged, or scale can form on the nozzles after prolonged use. This is especially true for large shower heads; clogged outlets reduce drainage, leading to excessive internal pressure in the shower head, which can cause it to break and fall, potentially injuring the user. Alternatively, large fluctuations in water pressure without proper pressure relief valves can cause sudden high pressure damage to the water-using equipment. Some shower heads have pressure relief devices to release pressure when clogged, but these are limited to specific models and have poor versatility. When releasing pressure, water is discharged from the side; however, because overhead shower heads are installed high, the released water may spray beyond the shower area and onto electrical appliances such as bathroom outlets, posing a safety hazard. Utility Model Content

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. Therefore, the present invention proposes an explosion-proof device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model also proposes a water outlet device with the above-mentioned explosion-proof device.

[0006] The explosion-proof device according to a first aspect of the present invention includes:

[0007] The outer casing has an internal cavity with a water inlet and a water outlet.

[0008] A water-passing component is installed in the cavity and is used to connect the water inlet and the water outlet.

[0009] An elastic component, elastically movably mounted on the water-passing member, is configured to move relative to the water-passing member between a first position and a second position in response to changes in water pressure at the inlet end; wherein...

[0010] When the water pressure at the inlet increases relatively, the elastic component moves to the first position under the action of water pressure, and reduces the water flow of the water-passing component.

[0011] When the water pressure at the inlet decreases, the elastic component elastically resets and moves to the second position, increasing the water flow rate of the water-passing component.

[0012] The explosion-proof device according to the embodiments of this utility model has at least the following beneficial effects: simple structure, automatic start-up protection, automatic reset after water pressure reduction, highly efficient and significant protection for the water outlet device, high compatibility, and no impact on the surrounding environment.

[0013] According to some embodiments of the present invention, the water-passing component includes an outer cylinder and an inner cylinder. The outer cylinder is disposed around the outside of the inner cylinder. A water-passing channel is formed between the outer cylinder and the inner cylinder. The outer cylinder is fixed in the cavity. The water-passing channel is used to connect the water inlet and the water outlet. The elastic component is elastically movable and mounted on the inner cylinder. When the elastic component moves to the first position, the water-passing cross-sectional area of ​​the water-passing channel is minimized. When the elastic component moves to the second position, the water-passing cross-sectional area of ​​the water-passing channel increases.

[0014] According to some embodiments of the present invention, the elastic component includes a plug and an elastic element. The plug includes a plug head and a plug rod. The plug rod passes through the inner cylinder. The elastic element is installed in the inner cylinder. The elastic element applies an elastic force to the plug rod, causing it to move towards the water inlet. The plug head is located between the water inlet and the water passage. When the elastic component moves to the first position, the plug head abuts against the end of the inner cylinder and blocks the end portion of the water passage.

[0015] According to some embodiments of the present invention, the inner cylinder is hollow inside and open at one end facing the water inlet. A first air chamber is defined between the stopper rod and the inner wall of the inner cylinder. A second air chamber is defined between a portion of the outer wall of the outer cylinder and the inner wall of the outer shell. A first air hole is provided on the inner cylinder, which connects the first air chamber and the second air chamber. A second air hole is provided on the outer shell, which connects the second air chamber to the outside of the outer shell.

[0016] According to some embodiments of the present invention, a first sealing ring is sleeved on the plug rod portion, and the first sealing ring abuts against the inner wall of the inner cylinder portion.

[0017] According to some embodiments of the present invention, the interior of the outer cylinder includes a first inner cavity, a second inner cavity, and a third inner cavity distributed sequentially from the water inlet end to the water outlet end. The inner diameter of the first inner cavity is larger than the inner diameter of the third inner cavity. The inner diameter of the second inner cavity gradually decreases from the first inner cavity to the third inner cavity. The inner cylinder is disposed in the third inner cavity. The water passage is defined between the outer wall of the inner cylinder and the cavity wall of the third inner cavity. The outer diameter of the plug head is smaller than the inner diameter of the third inner cavity.

[0018] According to some embodiments of this utility model, the inner wall of the water inlet is provided with an internal thread, and the outer wall of the water outlet is provided with an external thread.

[0019] According to some embodiments of the present invention, the inner wall of the outer shell is provided with a step, the end of the water-passing component near the water outlet end overlaps the step, and a hollow locking component is also installed in the outer shell. The locking component is threadedly connected to the internal thread, and the locking component abuts against the water-passing component and presses the water-passing component down toward the step.

[0020] According to some embodiments of the present invention, the locking member includes a first plug and a second plug. The first plug is threadedly connected to the internal thread. The second plug is inserted into the water-passing member. A second sealing ring is sleeved on the second plug and abuts against the inner wall of the water-passing member.

[0021] The water outlet device according to a second aspect of the present invention includes an explosion-proof device.

[0022] The water outlet device according to the embodiments of this utility model has at least the following beneficial effects: high versatility, simple and convenient to use, and high safety.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is an exploded view of the explosion-proof device.

[0026] Figure 2 It is a cross-sectional view of the outer casing;

[0027] Figure 3 This is a structural schematic diagram of the water passage component;

[0028] Figure 4This is a sectional view of the water passage component;

[0029] Figure 5 This is a schematic diagram showing the internal working state of the explosion-proof device in its first position.

[0030] Figure 6 This is a schematic diagram showing the explosion-proof device in its second position during use.

[0031] Figure 7 This is a schematic diagram of the water outlet device.

[0032] Reference numerals: Outer shell 100; Cavity 110; Inlet 120; Internal thread 121; Outlet 130; External thread 131; Second vent 140; Step 150; Water passage component 200; Outer cylinder 210; First inner cavity 211; Second inner cavity 212; Third inner cavity 213; Inner cylinder 220; First vent 221; Water passage 230; Elastic component 300; Plug 310; Plug head 311; Plug rod 312; Elastic component 320; First air chamber 401; Second air chamber 402; First sealing ring 501; Second sealing ring 502; Third sealing ring 503; Locking component 600; First plug head 610; Second plug head 620; Shower head 710; Water supply pipe 720. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] This utility model relates to an explosion-proof device, including a housing 100, a water-passing component 200, and an elastic component 300.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the outer casing 100 can be configured, but is not limited to, a cylindrical shape. The interior of the outer casing 100 is hollow, forming a cavity 110. The two ends of the cavity 110 form an inlet end 120 and an outlet end 130, respectively. A water-passing component 200 is installed in the cavity 110, intercepting the cavity 110 and connecting the inlet end 120 and the outlet end 130. An elastic component 300 is installed on the water-passing component 200 and can move elastically relative to the water-passing component 200. The elastic component 300 mainly moves elastically according to changes in water pressure at the inlet end 120. The first position is defined as the position where the elastic component 300 closes the water-passing component 200. At the first position, the water flow through the water-passing component 200 between the inlet end 120 and the outlet end 130 is minimized, but the connection between the inlet end 120 and the outlet end 130 is maintained. The positions of the elastic component 300 after leaving the first position are defined as the second position. In the second position, the water flow rate of the water-passing component 200 increases, and normal water flow occurs between the inlet end 120 and the outlet end 130 through the water-passing component 200. In actual use, the explosion-proof device is applied to the water outlet device. The water outlet device can be a shower head, spray nozzle, etc. Figure 7 As shown, the water outlet device is illustrated using a shower head as an example. The water outlet device includes a shower head 710 and a water supply pipe 720, which can be connected to a water heater or a tap water pipe, etc. The inlet end 120 of the explosion-proof device is connected to the water supply pipe 720, and the outlet end 130 is connected to the shower head 710. The water supply pipe 720 and the shower head 710 are connected and connected by the explosion-proof device. Figure 6 As shown, when the elastic component 300 is not subjected to water pressure or the water pressure at the inlet 120 is relatively low, the elastic component 300 remains in the second position. When the water supply pipe 720 is turned on, water is sequentially delivered from the water supply pipe 720 through the inlet 120, the water-passing component 200, and the outlet 130 to the shower head 710. When the shower head 710 is discharging water normally, the water from the water supply pipe 720 is supplied to the shower head 710 through the explosion-proof device. The water pressure acting on the elastic component 300 through the inlet 120 is insufficient to push the elastic component 300 to the first position; at this time, the water pressure is relatively low, meaning the elastic component 300 remains in the second position. For example, if the safety pressure resistance of the shower head 710 is set to 0.5 MPa, then the elastic force of the elastic component 300 is set to elastically move when subjected to a water pressure slightly less than 0.5 MPa at the inlet end 120. Therefore, water pressure less than the safety pressure resistance of the shower head 710 is considered relatively low, and water pressure greater than the safety pressure resistance of the shower head 710 is considered relatively high. When some water outlets of the shower head 710 become blocked and cannot discharge water normally, or when the water pressure at the water supply pipe 720 becomes abnormally high, the water pressure acting on the elastic component 300 at the inlet end 120 increases. This water pressure exceeds the elastic force of the elastic component 300. Figure 5 As shown, the elastic component 300 moves from the second position to the first position, rapidly reducing the water flow through the water-passing component 200. When the elastic component 300 moves to the first position, the water flow through the water-passing component 200 reaches its minimum. For example, after the elastic component 300 moves from the second position to the first position, the water flow from the inlet end 120 to the outlet end 130 through the water-passing component 200 is reduced by 96% to 99%. The water supply pipe 720 can continue to supply water to the shower head 710 through the explosion-proof device, but the water supply volume is extremely low, thereby achieving the effect of reducing the water pressure on the shower head 710. Water in the shower head 710 will slowly drain out through unblocked or partially blocked outlets. The water inlet to the shower head 710 via the water inlet 200 is less than the water outlet, allowing the shower head 710 to gradually release pressure and prevent damage from excessive water pressure. This also avoids the risk of the shower head 710 bursting due to high pressure. When the water supply pipe 720 is turned off, as the shower head 710 gradually releases pressure, the water pressure on the elastic component 300 at the inlet 120 gradually decreases, and the elastic component 300 elastically resets from the first position to the second position. Users can then perform a safety check or replace the shower head 710. Water will not be sprayed directly to the outside through the explosion-proof device, thus eliminating the risk of accidental spraying onto surrounding electrical circuits and causing a short circuit. The explosion-proof device has a simple structure, automatically starts protection, and automatically resets after the water pressure drops. It provides highly efficient and significant protection for the water outlet device, has high compatibility, and does not affect the surrounding environment.

[0036] In one embodiment, such as Figure 3 , Figure 4 and Figure 5As shown, the water-passing component 200 includes an outer cylinder portion 210 and an inner cylinder portion 220. The outer cylinder portion 210 can be cylindrical, and the inner cylinder portion 220 is located within the outer cylinder portion 210, with the outer cylinder portion 210 surrounding the inner cylinder portion 220. A water-passing channel 230 is formed between the inner wall of the outer cylinder portion 210 and the outer wall of the inner cylinder portion. The outer cylinder portion 210 and the inner cylinder portion 220 can be connected by connecting ribs and integrally formed. The outer cylinder portion 210 is fixed in the cavity 110, and a third sealing ring 503 can be fitted onto the outer wall of the outer cylinder portion 210. The third sealing ring 503 abuts against the inner wall of the outer casing 100, thereby preventing water leakage between the outer casing 100 and the outer cylinder portion 210. Alternatively, it can be sealed by other means such as applying sealant. A water passage 230 connects the inlet end 120 and the outlet end 130, allowing water to flow between them. One end of the water passage 230 faces the inlet end 120, and the other end faces the outlet end 130. An elastic component 300 is elastically movably mounted on the inner cylinder 220. The elastic component 300 can be configured to elastically move towards the inlet end 120. When the water pressure at the inlet end 120 is relatively low, as the elastic component 300 moves to a second position, it moves away from the water passage 230. At this time, the water passage 230 remains open, maximizing its cross-sectional area, allowing water to flow normally along the inlet end 120, the water passage 230, and the outlet end 130. When the water pressure at the inlet 120 increases to a level greater than the elastic force required for the elastic component 300 to move elastically, the elastic component 300 moves from the second position to the first position. The elastic component 300 then moves to one end of the water passage 230 and partially seals it. At this point, the cross-sectional area of ​​the water passage at the end of the water passage 230 is minimized, allowing water from the inlet 120 to flow through the water passage 230 to the outlet 130 with minimal flow rate. For example, when the elastic component 300 is in the second position, the maximum cross-sectional area of ​​the water passage at the end of the water passage 230 is 62 mm². When the elastic component 300 moves to the first position and seals the end of the water passage 230, the cross-sectional area of ​​the water passage at the end of the water passage 230 decreases to 1.8 mm².

[0037] Based on the above embodiments, such as Figure 1 , Figure 5 and Figure 6As shown, the elastic component 300 includes a plug 310 and an elastic element 320. The plug 310 includes a plug head 311 and a plug rod 312. The plug rod 312 passes through the inner cylinder 220 and is slidable along the inner cylinder 220. The elastic element 320 is installed in the inner cylinder 220. The elastic element 320 can be a spring or the like. One end of the elastic element 320 abuts against the inner wall of the inner cylinder 220, and the other end abuts against the plug rod 312. The elastic element 320 applies an elastic force to the plug rod 312, causing the plug rod 312 to move towards the water inlet 120. The plug head 311 is located outside the inner cylinder 220 and is located between the water inlet 120 and the water passage 230. The water pressure at the water inlet 120 acts on the plug head 311. When the water pressure applied to the plug head 311 by the inlet 120 is less than the elastic force of the elastic member 320, the elastic member 320 pushes the plug 310 to move to and maintain it in the second position. When the water pressure at the inlet 120 gradually increases and exceeds the elastic force of the elastic member 320, the water pressure pushes the plug 310 to move to the first position, the plug rod 312 retracts into the inner cylinder 220, and the plug head 311 moves towards the end of the water passage 230 toward the inlet 120. When the plug 310 moves to the first position, the plug head 311 partially blocks the end of the water passage 230, thereby minimizing the cross-sectional area of ​​the water passage at the end of the water passage 230.

[0038] The inner cylinder 220 is hollow, with one end open towards the water inlet 120 and the other end closed towards the water outlet 130. A stopper rod 312 is inserted into the inner cylinder 220 from its open end, defining a first air chamber 401 between the stopper rod 312 and the inner wall of the inner cylinder 220. A second air chamber 402 is formed between a portion of the outer wall of the outer cylinder 210 and the interior of the outer shell 100. Alternatively, a portion of the outer wall of the outer cylinder 210 may be recessed inward, forming the second air chamber 402 between the recessed portion and the inner wall of the outer shell 100. A first air hole 221 is provided on the inner cylinder 220, connecting the first air chamber 401 and the second air chamber 402. A second air hole 140 is provided on the outer shell 100, connecting the second air chamber 402 to the outside of the outer shell 100. The first air chamber 401 expands and contracts as the stopper rod 312 extends and contracts relative to the inner cylinder 220. The first air chamber 401 communicates with the outside atmosphere through the first air hole 221, the second air chamber 402, and the second air hole 140, preventing the stopper rod 312 from sliding smoothly relative to the inner cylinder 220 due to pressure buildup in the first air chamber 401. A first sealing ring 501 is fitted onto the stopper rod 312, abutting against the inner wall of the inner cylinder 220 to prevent water from flowing into the first air chamber 401 and causing leakage.

[0039] Furthermore, such as Figure 3 , Figure 4 and Figure 5 As shown, the outer cylinder 210 includes a first inner cavity 211, a second inner cavity 212, and a third inner cavity 213, which are sequentially distributed from the water inlet end 120 to the water outlet end 130. The first inner cavity 211, the second inner cavity 212, and the third inner cavity 213 are connected sequentially. The first inner cavity 211 and the third inner cavity 213 can be configured as cavities with equal diameters at all points. The inner diameter of the first inner cavity 211 is larger than the inner diameter of the third inner cavity 213. The second inner cavity 212 is configured as a conical cavity, and the inner diameter of the second inner cavity 212 gradually decreases from the first inner cavity 211 to the third inner cavity 213. The maximum inner diameter of the second inner cavity 212 is the same as the inner diameter of the first inner cavity 211, and the minimum inner diameter of the second inner cavity 212 is the same as the inner diameter of the third inner cavity 213. The inner cylinder portion 220 is disposed within the third inner cavity 213, and the water passage 230 is defined between the outer wall of the inner cylinder portion 220 and the cavity wall of the third inner cavity 213. The outer diameter of the plug head 311 is smaller than the inner diameter of the third inner cavity 213, and a gap exists between the sidewall of the plug head 311 and the cavity wall of the third cavity 213. Figure 6 As shown, when the plug head 311 is in the second position, it is located in the first inner cavity 211. Water from the inlet 120 flows into the water passage 230 along the first inner cavity 211 and the second inner cavity 212. As the plug head 311 gradually moves from the second position to the first position, it passes through the second inner cavity 212. The gap between the cavity wall of the second inner cavity 212 and the circumferential side wall of the plug head 311 gradually decreases, and the amount of water transported from the inlet 120 to the water passage gradually decreases until the plug head 311 moves into the third inner cavity 213. At this point, the water flows through the gap between the plug head 311 and the third inner cavity 213, which is when the cross-sectional area of ​​the water passage 230 is minimized.

[0040] In one embodiment, such as Figure 2 and Figure 5 As shown, the inner wall of the water inlet 120 is provided with an internal thread 121, and the outer wall of the water outlet 130 is provided with an external thread 131. The water inlet 120 is threaded to the water supply pipe 720 through the internal thread 121, and the water outlet 130 is threaded to the shower head 710 through the external thread 131, thereby quickly connecting the explosion-proof device between the water supply pipe 720 and the shower head 710.

[0041] Based on the above embodiment, a step 150 is provided on the inner wall of the outer casing 100. The end of the water-passing component 200 near the water outlet 130 overlaps the step 150. A locking component 600 is also installed in the outer casing 100. The locking component 600 is hollow in the middle and is annular. The locking component 600 is screwed into the outer casing 100 from the water inlet, and the locking component 600 is threadedly connected to the internal thread 121. The locking component 600 abuts against the water-passing component 200 and presses the water-passing component 200 downward toward the step 150, thereby clamping and fixing the water-passing component 200 between the locking component 600 and the step 150, thus completing the installation of the water-passing component 200. At the same time, by setting the inner diameter of the locking component 600 to be smaller than the outer diameter of the plug, the movement of the plug head 311 toward the water inlet 120 can be limited by the locking component 600, that is, limiting the extreme position of the second position.

[0042] Based on the above embodiments, such as Figure 1 and Figure 5 As shown, the locking member 600 includes a first plug head 610 and a second plug head 620. The first plug head 610 and the second plug head 620 can be arranged in a stepped manner. The outer diameter of the first plug head 610 is larger than the outer diameter of the second plug head 620. The first plug head 610 is threadedly connected to the internal thread 121, and the second plug head 620 is inserted into the water-passing member 200. A second sealing ring 502 is fitted on the second plug head 620, and the second sealing ring 502 abuts against the inner wall of the water-passing member 200. Through the sealing effect of the second sealing ring 502, water at the water inlet 120 is prevented from flowing into the gap between the water-passing member 200 and the outer casing 100.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An explosion-proof device, characterized in that, include: The outer casing (100) has a cavity (110) inside, and the cavity (110) has a water inlet (120) and a water outlet (130). A water-passing component (200) is installed in the cavity (110) and is used to connect the water inlet (120) and the water outlet (130). An elastic component (300) is elastically movably mounted on the water-passing component (200), the elastic component (300) being configured to move relative to the water-passing component (200) between a first position and a second position in response to water pressure changes at the water inlet (120); wherein, When the water pressure at the inlet (120) increases relatively, the elastic component (300) moves to the first position under the action of water pressure, and reduces the water flow of the water-passing component (200); When the water pressure at the inlet (120) decreases, the elastic component (300) elastically resets and moves to the second position, increasing the water flow of the water-passing component (200).

2. The explosion-proof device according to claim 1, characterized in that: The water-passing component (200) includes an outer cylinder (210) and an inner cylinder (220). The outer cylinder (210) is disposed around the outside of the inner cylinder (220). A water-passing channel (230) is formed between the outer cylinder (210) and the inner cylinder (220). The outer cylinder (210) is fixed in the cavity (110). The water-passing channel (230) is used to connect the water inlet (120) and the water outlet (130). The elastic component (300) is elastically and movably installed on the inner cylinder (220). When the elastic component (300) moves to the first position, the water-passing cross-sectional area of ​​the water-passing channel (230) is at its minimum. When the elastic component (300) moves to the second position, the water-passing cross-sectional area of ​​the water-passing channel (230) increases.

3. The explosion-proof device according to claim 2, characterized in that: The elastic component (300) includes a plug (310) and an elastic component (320). The plug (310) includes a plug head (311) and a plug rod (312). The plug rod (312) is inserted into the inner cylinder (220). The elastic component (320) is installed in the inner cylinder (220). The elastic component (320) applies an elastic force to the plug rod (312) to move it toward the water inlet end (120). The plug head (311) is located between the water inlet end (120) and the water passage (230). When the elastic component (300) moves to the first position, the plug head (311) abuts against the end of the inner cylinder (220) and blocks the end portion of the water passage (230).

4. The explosion-proof device according to claim 3, characterized in that: The inner cylinder (220) is hollow inside and opens towards the water inlet (120). A first air chamber (401) is defined between the stopper rod (312) and the inner wall of the inner cylinder (220). A second air chamber (402) is defined between a portion of the outer wall of the outer cylinder (210) and the inner wall of the outer shell (100). A first air hole (221) is provided on the inner cylinder (220), which connects the first air chamber (401) and the second air chamber (402). A second air hole (140) is provided on the outer shell (100), which connects the second air chamber (402) to the outside of the outer shell (100).

5. The explosion-proof device according to claim 4, characterized in that: A first sealing ring (501) is fitted on the stopper rod portion (312), and the first sealing ring (501) abuts against the inner wall of the inner cylinder portion (220).

6. The explosion-proof device according to claim 3 or 4, characterized in that: The outer cylinder (210) includes a first inner cavity (211), a second inner cavity (212), and a third inner cavity (213) distributed sequentially from the water inlet (120) to the water outlet (130). The inner diameter of the first inner cavity (211) is larger than the inner diameter of the third inner cavity (213). The inner diameter of the second inner cavity (212) gradually decreases from the first inner cavity (211) to the third inner cavity (213). The inner cylinder (220) is disposed in the third inner cavity (213). The water passage (230) is defined between the outer wall of the inner cylinder (220) and the cavity wall of the third inner cavity (213). The outer diameter of the plug head (311) is smaller than the inner diameter of the third inner cavity (213).

7. The explosion-proof device according to any one of claims 1 to 4, characterized in that: The inner wall of the water inlet (120) is provided with an internal thread (121), and the outer wall of the water outlet (130) is provided with an external thread (131).

8. The explosion-proof device according to claim 7, characterized in that: The inner wall of the outer casing (100) is provided with a step (150). The end of the water-passing component (200) near the water outlet (130) overlaps the step (150). A hollow locking component (600) is also installed in the outer casing (100). The locking component (600) is threadedly connected to the internal thread (121). The locking component (600) abuts against the water-passing component (200) and presses the water-passing component (200) down toward the step (150).

9. The explosion-proof device according to claim 8, characterized in that: The locking member (600) includes a first plug (610) and a second plug (620). The first plug (610) is threadedly connected to the internal thread (121). The second plug (620) is inserted into the water-passing member (200). A second sealing ring (502) is sleeved on the second plug (620). The second sealing ring (502) abuts against the inner wall of the water-passing member (200).

10. A water outlet device, characterized in that: Includes the explosion-proof device as described in any one of claims 1 to 9.

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