A seal assembly and dry showerhead

Abstract

The application relates to the technical field of spray heads, in particular to a sealing assembly, which comprises a sealing main body, the sealing main body comprising: a sealing head, the outer periphery of the sealing head being provided with an inner concave sealing groove; and a sealing ring, the sealing ring being arranged in the sealing groove, and the outer side of the sealing ring protruding from the outer periphery of the sealing head; wherein the sealing groove further has a surplus area relative to the sealing ring arranged in the sealing groove, the surplus area being located on the side of the sealing ring close to the top of the sealing head, and the outer contour of the sealing ring has a reduced space through the surplus area; the technical problem of how to simplify the sealing structure is solved, and the technical effect of simplifying the sealing structure is achieved.

Description

Technical Field

[0001] This application relates to the field of nozzle technology, and in particular to a sealing assembly and a dry nozzle. Background Technology

[0002] Dry sprinklers are generally used in cold environments (such as freezers) where water will not enter the sprinkler head beforehand, thus avoiding the risk of freezing. Specifically, to prevent water from the fire protection pipe network from entering, dry sprinklers are designed with a cavity and a sealing structure located within the cavity. The sealing structure seals the end of the cavity that connects to the fire protection pipe network (i.e., the sealing structure seals the upper end of the cavity) to ensure that water from the fire protection pipe network does not enter the sprinkler head.

[0003] The sealing structure in current dry nozzles is complex and consists of many components. Therefore, the technical problem with existing technology is how to simplify the sealing structure. Summary of the Invention

[0004] This application provides a sealing component and a dry nozzle, which solves the technical problem of how to simplify the sealing structure and achieves the technical effect of simplifying the sealing structure.

[0005] This application provides a sealing assembly, which adopts the following technical solution: The sealing assembly includes: a sealing body, the sealing body including: a sealing head, the outer periphery of the sealing head being provided with a concave sealing groove; a sealing ring, the sealing ring being disposed in the sealing groove, and the outer side of the sealing ring protruding from the outer periphery of the sealing head; wherein, the sealing groove has a spare area relative to the sealing ring disposed therein, the spare area being located on the side of the sealing ring near the top of the sealing head, and the spare area allows for a reduction in the outer contour of the sealing ring.

[0006] Preferably, the empty area is formed by the bottom surface and / or top surface of the sealing groove being bent inward and / or inclined.

[0007] A dry nozzle includes: a frame, the frame including: a cavity having a first end and a second end; a sealing assembly located in the cavity, which seals the cavity by the engagement of a sealing head and a sealing ring; and a triggering assembly located outside the cavity and close to the second end of the cavity, the triggering assembly being connected to the frame and directly / indirectly abutting against the sealing assembly to define the position of the sealing head in the cavity.

[0008] Preferably, the inner diameter of the cavity gradually decreases from the first end to the second end of the cavity; the sealing head is close to the first end of the cavity, and the top of the sealing head is close to the first end of the cavity.

[0009] Preferably, the triggering component is located below the cavity, and the inner diameter of the cavity gradually decreases from top to bottom; the top of the sealing head is located upward in the upper space of the cavity to seal the first end of the cavity.

[0010] Preferably, the cavity wall has an inclination angle α relative to the central axis of the cavity, and α ≤ 8°.

[0011] Preferably, the vertical cross-sectional area of ​​the empty area is greater than or equal to the vertical cross-sectional area of ​​the protruding part of the sealing ring / 6, and the difference in inner diameter between the first end and the second end of the cavity / 2 is less than or equal to the thickness d of the protruding part * 70%.

[0012] Preferably, a sealing rod is further provided between the sealing head and the triggering assembly, the sealing rod being located in the cavity, and a first end of the sealing rod being connected to or abutting the sealing head; a blocking plate being located outside the second end of the cavity, the blocking plate being fitted to the second end of the cavity; wherein, the sealing rod passes through the blocking plate, and a sealing tail is provided after the sealing rod passes through the blocking plate; the triggering assembly abuts against the sealing tail, so that the sealing head seals the first end of the cavity; the sealing tail abuts against the blocking plate, so that the blocking plate seals the second end of the cavity;

[0013] Alternatively, the triggering component abuts against the blocking plate to seal the second end of the cavity; the blocking plate abuts against the sealing rod to seal the first end of the cavity.

[0014] Alternatively, the blocking plate and the sealing rod are a single unit, with the triggering component abutting against the blocking plate so that the blocking plate seals the second end of the cavity while the sealing head seals the first end of the cavity.

[0015] Preferably, when the triggering component abuts the blocking plate and the blocking plate abuts the sealing rod, the blocking plate is in an elastically deformed state, and the direction of the elastic deformation is towards the sealing rod; or, at least one of the sealing rod and the sealing head, or between the sealing rod and the blocking plate, is provided with an elastic compensation element.

[0016] Preferably, the blocking plate is a splash plate, and the splash plate is also connected to a connecting rod, which passes through the frame and can slide up and down relative to the frame, so that the splash plate has two position states: one that is close to the second end of the cavity and the other that is far away from the second end of the cavity.

[0017] Preferably, if the triggering component and the sealing tail abut, a balancing component is provided between the triggering component and the sealing tail; if the triggering component and the blocking plate abut, a balancing component is provided between the triggering component and the blocking plate; wherein, the balancing component includes: a balancing plate, which contacts the triggering component; and a rolling element, one end of which abuts the balancing plate, and the other end of which abuts the sealing tail / the blocking plate.

[0018] Unlike existing technologies, the advantages of this application are: by constructing a sealing head with a free area at the first end of the sealing groove, the sealing ring on it can stably seal the first end of the cavity, preventing the sealing ring from failing due to displacement caused by external forces; and when the nozzle is triggered by temperature sensing, the sealing head can push the sealing ring to deform towards the free area based on the pressure of the fire pipe network. The deformation of the sealing ring reduces its outer contour, allowing the sealing component to smoothly detach from the first end of the cavity downwards; thus solving the technical problem of how to simplify the sealing structure and achieving the technical effect of simplifying the sealing structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main view cross-sectional structure of the dry nozzle in this application;

[0020] Figure 2 This is a schematic diagram of the main view cross-sectional structure of the sealing assembly in this application;

[0021] Figure 3 yes Figure 1 Enlarged view of the schematic structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the main view section structure of the sealing head in this application;

[0023] Figure 5 This is a schematic diagram of the main view cross-sectional structure of another sealing head in this application;

[0024] Figure 6 This is a schematic diagram of the main view cross-sectional structure of the dry nozzle in this application after it is triggered;

[0025] Figure 7 yes Figure 1 Enlarged view of the schematic structure at point B;

[0026] Figure 8 yes Figure 1 Enlarged schematic diagram of another embodiment at point B;

[0027] Figure 9 This is a schematic diagram of the main view cross-sectional structure of another type of dry nozzle in this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Frame; 11. Cavity; 11a. First end of cavity; 11b. Second end of cavity; 111. Cavity wall; 12. Receiving cavity; 13. Contact part; 200. Sealing assembly; 21. Sealing body; 211. Sealing head; 2111. Sealing groove; 2111a. First end of sealing groove; 2111b. Second end of sealing groove; 21111. Bottom surface of groove; 21112. Top surface of groove; 21113. Empty area; 2112. Top of sealing head; 212. Sealing rod; 213. Sealing tail; 22. Sealing ring; 221. Protruding part; 300. Water splashing assembly; 31. Water splashing plate; 311. Through hole; 32. Connecting rod; 400. Balancing assembly; 41. Balancing plate; 42. Rolling element; 500. Triggering assembly; 600. Elastic compensation element. Detailed Implementation

[0030] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely for the convenience of describing this application and simplifying the description. They do not 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 application.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] To better understand the above technical solutions, a detailed description of the technical solutions will be provided below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0033] This application provides a dry sprinkler head with a cavity 11, in which no water flows, so that the dry sprinkler head can be used in low-temperature environments. The dry sprinkler head includes a frame 100, a sealing assembly 200, a plug plate, and a triggering assembly 500; the frame 100 includes a cavity 11, which has a first cavity end 11a and a second cavity end 11b. The first cavity end 11a is sealed by the sealing assembly 200, and the second cavity end 11b is sealed by the plug plate; wherein, the sealing assembly 200 and the plug plate have two structural relationships, as described in the reference... Figure 1 The first structural relationship is that the sealing component 200 passes through the blocking plate and acts on the blocking plate. When the trigger component 500 abuts against the sealing component 200, the sealing component 200 abuts against the blocking plate in the same direction, so as to achieve the effect of sealing the first end 11a of the cavity while simultaneously driving the blocking plate to seal the second end 11b of the cavity; Reference Figure 9 The second structural relationship is that the sealing component 200, the plug plate, and the trigger component 500 are arranged sequentially along the axial direction of the cavity 11. The trigger component 500 abuts against the plug plate, and the plug plate abuts against the sealing component 200, so as to achieve the effect of the plug plate sealing the second end 11b of the cavity while driving the sealing component 200 to seal the first end 11a of the cavity.

[0034] Frame 100, Reference Figure 1 The frame 100 serves as the basic skeleton of the sprinkler head, upon which various components can be assembled to achieve the functions of sealing the piping network and temperature-triggered activation. The frame 100 contains a cavity 11 and a receiving cavity 12 connected to the cavity 11. The first end of the cavity 11 connects the dry sprinkler head to the fire-fighting piping network, and the second end of the cavity 11 connects to the receiving cavity 12. Specifically, sealing components work together to seal both ends of the cavity 11 to ensure that no water flows through the dry sprinkler head. The receiving cavity 12 houses a plug and a temperature-triggered activation assembly 500. Because the receiving cavity 12 is connected to the second end 11b of the cavity, the activation assembly 500 can transmit a supporting force to the sealing components used to seal both ends of the cavity 11. When the activation assembly 500 disintegrates due to temperature triggering, the sealing components used to seal the cavity 11 lose the aforementioned supporting force, causing the seal to fail, thereby triggering the dry sprinkler head.

[0035] Sealing assembly 200, reference Figure 1 and Figure 2The sealing assembly 200 is at least partially located in the cavity 11 and is used to seal the first end 11a of the cavity. The sealing assembly 200 includes a sealing body 21 and a sealing ring 22. The sealing body 21 includes a sealing head 211 for engaging with the sealing ring 22 and a sealing rod 212 that abuts against / connects to the sealing head 211. It is understood that the sealing head 211 engages with the sealing ring 22 to seal the first end 11a of the cavity, while the sealing rod 212 is used to transmit the supporting force directly / indirectly transmitted from the triggering assembly 500 to the sealing head 211. In one embodiment, the sealing rod 212 can be a single unit fixedly connected to the sealing head 211. By controlling the sealing rod 212, the sealing head 211 can be flexibly controlled to reduce the number of parts and simplify assembly. In another embodiment, the sealing rod 212 and the sealing head 211 are detachably connected / aggregate so that the sealing assembly 200 can be disassembled and detached when the dry nozzle is triggered, ensuring triggering stability. For example, the sealing rod 212 and the sealing head 211 can be snapped or threaded together so that when the nozzle is assembled with the plug plate, the sealing rod 212 can pass through the plug plate and connect with the sealing head 211.

[0036] refer to Figure 3 The sealing head 211 has a recessed sealing groove 2111 on its outer periphery; a sealing ring 22 is disposed in the sealing groove 2111, and the outer side of the sealing ring 22 protrudes from the outer periphery of the sealing head 211. The protruding portion 221 of the sealing ring 22 fills the gap between the sealing head 211 and the cavity wall 111, thereby achieving a seal at the first end 11a of the cavity. (Reference) Figure 4 The sealing groove 2111 has a spare area 21113 relative to the sealing ring 22. This spare area 21113 is located on the side of the sealing ring 22 near the top 2112 of the sealing head (the top 2112 is the part of the sealing head 211 near the first end 11a of the cavity, i.e., the first end 2111a of the sealing groove). This spare area 21113 allows for a smaller outer contour of the sealing ring 22. It should be noted that the placement of the spare area 21113 within the sealing groove 2111 is crucial; improper placement will result in an incomplete seal when the sealing ring 22 seals the first end 11a of the cavity. (Reference) Figure 4 and Figure 5Preferably, the spare area 21113 is formed by bending and / or tilting the bottom surface 21111 and / or the top surface 21112 of the sealing groove 2111 inward. The advantage of placing the spare area 21113 on the upper inner side, upper middle inner side, or middle inner side of the sealing groove 2111 is that, during the uninstalled stage after nozzle assembly or when the nozzle is in standby mode, without external force pushing the sealing head 211, the sealing ring 22 will not detach from the lower end of the cavity 11 after shrinking its volume through the aforementioned spare area 21113. That is, the seal of the sealing assembly 200 on the first end 11a of the cavity will not be accidentally released, and the sealing assembly 200 can stably seal the first end 11a of the cavity. However, when pressure pushes the sealing head 211, the sealing ring 22 can detach from the lower end of the cavity 11 after shrinking its volume through the aforementioned spare area 21113. That is, the seal of the sealing assembly 200 on the first end 11a of the cavity can be released under the pressure of the normal fire protection network. Among them, the preferred groove bottom surface 21111 is an inclined surface. This design is beneficial to guide the sealing ring 22 to deform towards the empty area 21113 when it is squeezed.

[0037] Regarding the relationship between cavity 11 and sealing assembly 200, in one embodiment, refer to... Figure 1 The inner diameter of cavity 11 gradually decreases from the first end 11a to the second end 11b. Sealing head 211 is located near the first end 11a, and its top 2112 is also near the first end 11a. In other words, the inner diameter of cavity 11 gradually decreases from top to bottom, sealing head 211 is located in the upper space of cavity 11, and its top 2112 is the upper part of sealing head 211. It should be noted that the structure of cavity 11 with a gradually decreasing inner diameter from top to bottom is beneficial for ensuring the water flow rate of the dry nozzle and also for improving the sealing effect of sealing assembly 200 (i.e., when there is a gap in any contact surface of trigger assembly 500, plug plate, or sealing assembly 200, sealing head 211 will move downwards under downward pressure to eliminate the aforementioned gap; and since the inner diameter of cavity 11 gradually decreases from top to bottom, the downward movement of sealing head 211 ensures that sealing head 211 can still seal the first end 11a of cavity). For details, please refer to Figure 3When the sealing head 211 is supported by the trigger component 500 and its position is stable, the sealing ring 22 tends to move downward along the cavity 11 under the pressure of the fire pipeline. However, since the inner diameter of the cavity 11 is smaller than the outer diameter and the empty area 21113 is not set in the lower part of the sealing groove 2111, the sealing ring 22 tends to be close to the lower end of the cavity 11, which will make the sealing ring 22 and the cavity wall 111 fit tightly, thus achieving the effect of stabilizing the sealing of the first end 11a of the cavity. When the dry sprinkler head is triggered, the sealing head 211 loses the support force from the triggering component 500, and the pressure in the fire protection network also pushes the sealing head 211 downward along the cavity 11. At this time, the sealing ring 22 can transfer its volume to the empty area 21113 in the sealing groove 2111 through deformation, so as to reduce the protrusion 221 of the sealing ring 22 relative to the sealing head 211. The pressure of the fire protection network reduces the protrusion 221 of the sealing ring 22, so that the sealing component 200 can be removed from the cavity 11 with the gradually decreasing inner diameter.

[0038] Regarding the inner diameter setting of cavity 11, in one embodiment, refer to... Figure 3 The cavity wall 111 of cavity 11 has an inclination angle α relative to the central axis of cavity 11, and α ≤ 8°. It can be understood that, based on the aforementioned gradual reduction in the inner diameter of cavity 11 from top to bottom, the inclination direction of the aforementioned inclination angle α is a direction that moves from top to bottom towards the central axis of cavity 11. When the inclination angle α is between 0° and 15°, a larger inclination angle α is beneficial for increasing the water spray flow rate, but it also increases the requirement for the elastic deformation amplitude of the sealing ring 22, affecting the sealing effect of the sealing ring 22 on the first end 11a of the cavity. Therefore, an inclination angle α between 0° and 10° is more suitable, and the specific value of the inclination angle α can be 1°, 2°, 4°, or 6°.

[0039] It should be noted that, in one embodiment, reference is made to... Figure 5The vertical cross-sectional area of ​​the empty region 21113 is greater than or equal to the vertical cross-sectional area of ​​the protruding portion 221 of the sealing ring 22 / 6, and the difference in inner diameter between the first end 11a and the second end 11b of the cavity / 2 is less than or equal to the thickness d of the protruding portion 221 * 70%. The aforementioned protruding portion 221 describes the unilateral protruding portion 221 of the sealing assembly 200 when it is not subjected to external force, i.e., the protruding portion 221 of the sealing ring 22 when the sealing assembly 200 is not inserted into the cavity 11 (the sealing ring 22 is not compressed). The vertical direction in the vertical cross-sectional area refers to the up-down direction of the cavity 11, i.e., the direction of the central axis between the first end 11a and the second end 11b of the cavity. The requirement that the vertical cross-sectional area of ​​the empty region 21113 be greater than or equal to the vertical cross-sectional area of ​​the protruding portion 221 of the sealing ring 22 / 6 is to ensure that when the sealing ring 22 is deformed and squeezed into the empty region 21113 by external force, the empty region 21113 has sufficient space to accommodate the deformed portion of the sealing ring 22. This ensures that after the sealing ring 22 deforms into the empty region 21113, it no longer protrudes outward relative to the sealing head 211 or the protruding portion 221 of the sealing ring 22 shrinks, so that the sealing assembly 200 can smoothly disengage from the second end 11b of the cavity, ensuring that the nozzle can be smoothly triggered. In addition, the requirement that the difference in inner diameter between the first end 11a and the second end 11b of the cavity / 2 be less than or equal to the thickness d * 70% of the protruding portion 221 is to ensure that the sealing ring 22 can be used to seal the first end 11a of the cavity and can also be compressed to pass through the second end 11b of the cavity. In one embodiment, the inner diameter of the first end 11a of the cavity is 1.8 cm, the inner diameter of the second end 11b of the cavity is 1.6 cm, the diameter of the sealing head 211 is 1.5 cm, and the thickness d of the protruding portion 221 of the sealing ring 22 is 0.2 cm. It is calculated that the difference in inner diameter between the first end 11a and the second end 11b of the cavity / 2 = (1.8 - 1.6) / 2 = 0.1 cm ≤ the thickness d of the protruding portion 221 * 70% (normal non-compression state) = 0.2 * 70% = 0.14 cm, which is as expected. It should be noted that the aforementioned 0.1 cm represents the outer contour of the sealing ring 22 located on the sealing head 211 needing to shrink by 0.1 cm on one side as it falls from the first end 11a to the second end 11b of the cavity; that is, the sealing ring 22 needs to be deformed inward by 0.1 cm on one side. On the other hand, under normal non-compression conditions, the outer contour dimension of the combined sealing head 211 and sealing ring 22 is 1.5 + 0.2 * 2 = 1.9 cm. When the combined assembly passes through the first end 11a of the sealing cavity, the outer contour dimension is compressed from 1.9 cm to 1.8 cm. When the combined assembly passes through the second end 11b of the cavity, the outer contour dimension is compressed from 1.8 cm to 1.6 cm (at this time, the thickness d of the protruding part 221 is compressed to 0.05 cm). In this way, the combined assembly can stably seal the first end 11a of the cavity and can also compress its volume to dislodge from the second end 11b of the cavity.

[0040] Trigger component 500, see reference. Figure 1 The trigger assembly 500 is a combination of multiple blocks and a temperature sensing element, used to trigger disassembly / removal upon sensing high temperature to revoke support for the sealing assembly 200. The trigger assembly 500 is located outside the cavity 11 and close to the second end 11b of the cavity. The trigger assembly 500 is connected to the frame 100 and directly / indirectly abuts against the sealing assembly 200 to define the position of the sealing head 211 within the cavity 11.

[0041] It is understood that the sealing assembly 200 is at least partially located in the cavity 11 of the frame 100, and the blocking plate and trigger assembly 500 are located in the receiving cavity 12 of the frame 100. The sealing assembly 200, the blocking plate, and the trigger assembly 500 form a support relationship. When the trigger assembly 500 is triggered, the sealing assembly 200 and the blocking plate lose their support and de-seal the partial seal on the frame 100. Regarding the sealing relationship between the blocking plate and the second end 11b of the cavity, the blocking plate can be positioned within the channel of the second end 11b of the cavity, as shown in the reference. Figure 7 The blocking plate can also be attached to the end face of the second end 11b of the cavity. The contact between the blocking plate and the end face of the second end 11b of the cavity can be surface-to-surface, or optimized to a line-to-surface contact, or an approximate line-to-surface contact. See [reference needed] for details. Figure 8 A protruding abutment 13 is provided on the end face of the second end 11b of the cavity. The end of the abutment 13 that contacts the plug plate is sharp or nearly sharp, so as to achieve a small contact area between the two. By reducing the contact area, the pressure of the contact area is indirectly increased to ensure sealing.

[0042] Specifically, there are three relationships between the sealing component 200, the blocking plate, and the triggering component 500 in this application.

[0043] refer to Figure 1The first structural configuration is as follows: the sealing rod 212 is located in the cavity 11. The first end of the sealing rod 212 is connected to or abuts against the sealing head 211. The second end of the sealing rod 212 passes through the plug plate, and the sealing rod 212 extends to form a sealing tail 213 after passing through the plug plate (the sealing tail 213 and the sealing rod 212 can be a single unit or separate components). The trigger assembly 500 abuts against the sealing tail 213, so that the sealing head 211 seals the first end 11a of the cavity. The sealing tail 213 abuts against the plug plate, so that the plug plate seals the second end 11b of the cavity. With the above structural configuration, the trigger assembly 500 acts on the sealing tail 213 extending from the sealing rod 212. Since the sealing rod 212 provides support for both the sealing head 211 and the plug plate, and thus the support force from the trigger assembly 500 is divided into two, the support force is more direct, and the support force is stably transmitted, ensuring that the sealing assembly 200 stably seals the first end 11a of the cavity. Furthermore, this design, where the plug and sealing assembly 200 are combined into one unit, reduces the number of parts and facilitates convenient assembly of the nozzle.

[0044] refer to Figure 9 The second structural form is as follows: the trigger component 500 abuts against the blocking plate, so that the blocking plate seals the second end 11b of the cavity; the blocking plate abuts against the sealing rod 212, so that the sealing head 211 seals the first end 11a of the cavity. This graded abutment structure does not require the combination of the blocking plate and the sealing rod 212, reducing the processing requirements of the parts. It is understandable that in order to ensure the long-term effective support of the blocking plate for the sealing head 211 and to avoid the weakening of the support effect due to the loosening between the blocking plate and the sealing head 211 over a long period of time, an elastic compensation force is provided for the entire support system. Specifically, the blocking plate is in a state of elastic deformation, and the direction of elastic deformation is towards the sealing rod 212; or at least one elastic compensation element is provided between the sealing rod 212 and the sealing head 211, or between the sealing rod 212 and the blocking plate. In one embodiment, the elastic compensating member is positioned on the side of the blocking plate facing the sealing rod 212 to prevent it from sliding relative to the blocking plate; the elastic compensating member and the sealing rod 212 are also designed to be interlocked / sleeved to prevent the elastic compensating member from sliding relative to the sealing rod 212. In another embodiment, both ends of the elastic compensating member can be directly fixedly connected to the sealing rod 212 and the blocking plate.

[0045] The third structural form is a variation of the second structural form. Specifically, the plug plate and sealing rod 212 are changed from two independent parts that are in contact to a design that is integrated. The trigger assembly 500 abuts against the plug plate so that while the plug plate seals the second end 11b of the cavity, the sealing head 211 seals the first end 11a of the cavity.

[0046] Regarding the blocking plate, it should be noted that in addition to sealing the second end 11b of the cavity, the blocking plate can also be combined with the function of the splash plate 31 to create a built-in splash plate 31. (Reference) Figure 1 The blocking plate is specifically shaped like a splash plate 31. The splash plate 31 is also connected to a connecting rod 32, which passes through the frame 100. The connecting rod 32 can slide up and down relative to the frame 100, allowing the splash plate 31 to have two positional states: one where it is in contact with the second end 11b of the cavity, and the other where it is away from the second end 11b of the cavity. (Reference) Figure 6 When the blocking plate and the sealing rod 212 are in the first structural form, a through hole 311 is provided in the center of the splash plate 31. The sealing rod 212 passes through the through hole 311 and extends to the lower end of the splash plate 31 to form a sealing tail 213. The sealing tail 213 covers the area outside the through hole 311 of the splash plate 31, so that the upper end face of the sealing tail 213 contacts the lower end face of the splash plate 31, so as to realize the transmission of the supporting force.

[0047] To improve the direct or indirect contact effect between the trigger assembly 500 and the sealing assembly 200 during assembly, the trigger assembly 500 is also equipped with a balancing assembly 400. The lower periphery of the balancing assembly 400 bears the supporting force of the trigger assembly 500, and the upper center of the balancing assembly 400 abuts against the sealing tail 213 / blocking plate, so as to concentrate the originally basically ring-shaped and dispersed supporting force of the trigger assembly 500 into a single point. In one embodiment, refer to Figure 1 If the trigger component 500 and the sealing tail 213 come into contact, a balancing component 400 is provided between the trigger component 500 and the sealing tail 213; Reference Figure 9 If the trigger component 500 and the blocking plate abut, a balancing component 400 is provided between the trigger component 500 and the blocking plate. The balancing component 400 includes a balancing plate 41 and a rolling element 42. The balancing plate 41 contacts the trigger component 500; one end of the rolling element 42 abuts against the balancing plate 41, and the other end of the rolling element 42 abuts against the sealing tail 213 / blocking plate. The balancing component 400 allows the force of the trigger component 500 to be concentrated on the sealing tail 213 / blocking plate, ensuring a sealing effect on the second end 11b of the cavity and the first end of the cavity 11. Specifically, the balancing plate 41 can be a plate, and the rolling element 42 can be a roller or a ball. To prevent the rolling element 42 from slipping, limiting grooves (not shown in the figure) can be provided on the balancing plate 41 and the sealing tail 213 / blocking plate corresponding to the rolling element 42.

[0048] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0049] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A sealing assembly (200), characterized in that, The sealing assembly (200) includes: A sealing body (21), the sealing body (21) comprising: A sealing head (211) is provided with a concave sealing groove (2111) on its outer periphery; A sealing ring (22) is disposed in the sealing groove (2111), and the outer side of the sealing ring (22) protrudes from the outer periphery of the sealing head (211). The sealing groove (2111) has a spare area (21113) relative to the sealing ring (22) therein. The spare area (21113) is located on the side of the sealing ring (22) near the top (2112) of the sealing head. The spare area (21113) allows the outer contour of the sealing ring (22) to have a reduced space.

2. The sealing assembly (200) according to claim 1, characterized in that, The empty area (21113) is formed by the inward bending and / or tilting of the bottom surface (21111) and / or the top surface (21112) of the sealing groove (2111).

3. A dry spray nozzle, characterized in that, The dry nozzle includes: Frame (100), the frame (100) comprising: A cavity (11) having a first cavity end (11a) and a second cavity end (11b); A sealing assembly (200), as described in any one of claims 1-2, wherein the sealing assembly (200) is located in the cavity (11) and seals the cavity (11) by means of the combination of the sealing head (211) and the sealing ring (22); A trigger assembly (500) is located outside the cavity (11) and close to the second end (11b) of the cavity. The trigger assembly (500) is connected to the frame (100) and directly abuts / indirectly abuts the sealing assembly (200) to define the position of the sealing head (211) in the cavity (11).

4. The dry spray head according to claim 3, characterized in that, The inner diameter of the cavity (11) gradually decreases from the first end (11a) to the second end (11b) of the cavity; the sealing head (211) is close to the first end (11a) of the cavity, and the top of the sealing head (2112) is close to the first end (11a) of the cavity.

5. The dry spray head according to claim 3, characterized in that, The cavity wall (111) of the cavity (11) has an inclination angle α relative to the central axis of the cavity (11), and α≤8°.

6. The dry spray head according to claim 3, characterized in that, The vertical cross-sectional area of ​​the empty area (21113) is greater than or equal to the vertical cross-sectional area of ​​the protruding part (221) of the sealing ring (22) / 6, and the difference in inner diameter between the first end (11a) and the second end (11b) of the cavity / 2 is less than or equal to the thickness d*70% of the protruding part (221).

7. The dry spray head according to claim 3, characterized in that, A further portion is provided between the sealing head (211) and the trigger assembly (500): A sealing rod (212) is located in the cavity (11), and the first end of the sealing rod (212) is connected to or abuts the sealing head (211); A blocking plate, the blocking plate being located outside the second end (11b) of the cavity, the blocking plate being attached to the second end (11b) of the cavity; The sealing rod (212) passes through the blocking plate, and after passing through the blocking plate, the sealing rod (212) extends to provide a sealing tail (213); the trigger assembly (500) abuts against the sealing tail (213) so that the sealing head (211) seals the first end (11a) of the cavity; the sealing tail (213) abuts against the blocking plate so that the blocking plate seals the second end (11b) of the cavity. Alternatively, the triggering component (500) abuts against the blocking plate so that the blocking plate seals the second end (11b) of the cavity; the blocking plate abuts against the sealing rod (212) so that the sealing head (211) seals the first end (11a) of the cavity; Alternatively, the blocking plate and the sealing rod (212) are a single unit, and the triggering component (500) abuts against the blocking plate so that the blocking plate seals the second end (11b) of the cavity while the sealing head (211) seals the first end (11a) of the cavity.

8. The dry spray head according to claim 7, characterized in that, If the trigger component (500) abuts against the blocking plate and the blocking plate abuts against the sealing rod (212); the blocking plate is in an elastically deformed state, and the direction of the elastic deformation is toward the sealing rod (212); or, at least one of the sealing rod (212) and the sealing head (211), and at least one of the sealing rod (212) and the blocking plate, is provided with an elastic compensation member (600).

9. The dry spray head according to claim 7, characterized in that, The blocking plate is a splash plate (31), and the splash plate (31) is also connected to a connecting rod (32). The connecting rod (32) passes through the frame (100). The connecting rod (32) can slide up and down relative to the frame (100) so that the splash plate (31) has two position states: one that is close to the second end (11b) of the cavity and the other that is far away from the second end (11b) of the cavity.

10. The dry spray head according to claim 7, characterized in that, If the triggering component (500) and the sealing tail (213) abut, a balancing component (400) is provided between the triggering component (500) and the sealing tail (213); if the triggering component (500) and the blocking plate abut, a balancing component (400) is provided between the triggering component (500) and the blocking plate; wherein, the balancing component (400) includes: The balance plate (41) is in contact with the trigger assembly (500); The rolling element (42) has one end in contact with the balance plate (41) and the other end of the rolling element (42) in contact with the sealing tail (213) / the blocking plate.

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