Fire sprinkler head

Abstract

This utility model relates to the field of fire sprinklers, specifically a fire sprinkler head, including a receiving cavity and a closed cavity. The receiving cavity is vertically connected, and the closed cavity is fixedly disposed at the bottom opening of the receiving cavity to close the bottom of the receiving cavity. A movable frame is slidably disposed in the middle of the closed cavity, and a sealing plate with the same shape as the opening of the closed cavity is fixed at the bottom of the movable frame. The sealing plate can move with the movable frame to close the bottom of the closed cavity. The bottom of the closed cavity has multiple arc-shaped grooves with openings facing the center of the closed cavity and spiraling upward. Multiple adjusting blocks adapted to the shape of the bottom opening of the arc-shaped groove are fixed on the outside of the sealing plate. The beneficial effect is that by pushing the bottom sealing plate into the closed cavity, the adjusting blocks simultaneously enter the arc-shaped groove and slide along a spiral upward trajectory guided by the groove wall. After the pushing force disappears, the adjusting blocks slide in the opposite direction along the arc-shaped groove and lock into the locking groove. The sealing plate then descends to a preset position to close the bottom of the receiving cavity, realizing convenient shutdown of the fire sprinkler head after accidental triggering.

Description

Technical Field

[0001] This utility model relates to the field of fire sprinkler heads, specifically to a fire sprinkler head. Background Technology

[0002] Fire sprinklers are the core component of fire sprinkler systems, and their reliability directly affects fire extinguishing efficiency.

[0003] In the prior art, for example, Chinese utility model patent CN223311571U discloses a fire sprinkler head for fire fighting, which effectively solves the problem of thermistor elements being easily damaged by external collisions by setting a retractable protective tube on the outside of the thermistor glass ball, and improves the ability to prevent false triggering.

[0004] However, when the sprinkler head is triggered by non-fire factors, such as collisions or misoperation, it cannot be easily reset and shut off. Specifically, once the thermal elements such as the thermal glass bulb break or the sealing plug falls off, the sprinkler head will continue to spray water until it is manually repaired and replaced. This not only wastes water resources and causes water damage, but may also lead to serious consequences such as damage to important indoor equipment. Especially in areas with high-value equipment or precision production sites, the continuous spraying after accidental triggering will cause the risk of secondary disasters.

[0005] While some existing technologies focus on the physical protection of thermal elements, they neglect the emergency handling needs after false triggering. Traditional nozzles rely on a single thermal triggering mechanism and lack a reversible mechanical reset structure, which means that the entire nozzle must be disassembled and replaced after false triggering, making the operation complex and time-consuming.

[0006] Therefore, there is an urgent need for a fire sprinkler head that can both ensure normal fire triggering function and achieve rapid and reliable reset after false triggering, in order to solve the technical problems of irreversible false triggering and difficult reset in the existing technology. Utility Model Content

[0007] The purpose of this utility model is to provide a fire sprinkler head to solve the above problems. By pushing the bottom sealing plate into the closed cavity, the adjusting block simultaneously enters the arc groove and slides along the spiral upward trajectory guided by the groove wall. After the pushing force disappears, the adjusting block slides in the opposite direction along the arc groove and gets stuck in the locking groove. The sealing plate then descends to the preset position to close the bottom of the receiving cavity, realizing convenient shutdown of the fire sprinkler head after accidental triggering. See the following description for details.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a fire sprinkler head, comprising a receiving cavity and a closed cavity, wherein the receiving cavity is vertically connected, and the closed cavity is fixedly disposed at the bottom opening of the receiving cavity to close the bottom of the receiving cavity; A movable frame is slidably arranged in the middle of the enclosed cavity. A sealing plate with the same shape as the opening of the enclosed cavity is fixed at the bottom of the movable frame. The sealing plate can move with the movable frame to close the bottom of the enclosed cavity. The bottom of the enclosed cavity has multiple arc-shaped grooves with openings facing the center of the enclosed cavity and spiraling upward. Multiple adjusting blocks adapted to the shape of the bottom opening of the arc-shaped groove are fixed on the outside of the sealing plate. The adjusting blocks can drive the movable frame and the clamping plate to rotate and rise in the arc-shaped groove. A locking groove is provided on one inner wall of the arc-shaped groove to lock the adjusting block that descends after losing thrust.

[0009] When a fire sprinkler head is accidentally triggered, pushing the bottom sealing plate allows it to enter the enclosed cavity. Simultaneously, the adjusting block enters the arc-shaped groove. Guided by the groove wall, the adjusting block slides upward along a spiral trajectory, causing the movable frame and sealing plate to rotate and rise synchronously. As the sealing plate rises, it gradually disengages from the bottom opening of the enclosed cavity. When the pushing force disappears, the movable frame and sealing plate descend under gravity, and the adjusting block slides in the opposite direction along the arc-shaped groove. When the adjusting block slides to the locking groove position, it engages and prevents the adjusting block from descending further, thus locking the movable frame and sealing plate at the current height. At this point, the sealing plate descends to the preset position to seal the bottom of the receiving cavity, thereby shutting off the fire sprinkler head.

[0010] Preferably, the movable frame is fixedly provided with a card plate on both sides, and the top of the closed cavity is provided with vertical guide grooves that are adapted to the card plate on both sides. The length of the guide groove is equal to the vertical distance between the adjusting block and the card plate so that the adjusting block enters the arc groove after the card plate leaves the guide groove.

[0011] Preferably, the side of the locking groove near the higher side of the arc-shaped groove is a guide slope, which guides the adjusting block to enter the locking groove when it descends.

[0012] Preferably, a locking plate is provided in the middle of the inner wall of the sealed cavity, and a sliding column is slidably provided in the middle of the locking plate. The bottom of the sliding column is fixed to the top of the sealing plate to guide the movement of the sealing plate. The middle of the locking plate is also provided with slots distributed around the array of sliding columns to allow water to flow through.

[0013] Preferably, the sliding column located between the sealing plate and the locking plate is fitted with a spring that tightly fits the adjusting block with the bottom of the locking groove.

[0014] Preferably, the top of the enclosed cavity has two slots that are staggered with the guide groove.

[0015] Preferably, the bottom of the sealing plate is rotatably provided with a rotating column, and the bottom of the rotating column is fixed with a plurality of blades arranged in a ring array around the axis of the rotating column to enhance the spray diffusion effect.

[0016] Preferably, a water inlet pipe is fixed in the middle of the top opening of the receiving cavity, a sealing block is interference-connected to the bottom of the water inlet pipe, an installation groove is provided in the top of the closed cavity, and a thermal glass rod with its two ends respectively abutting against the sealing block and the installation groove is placed in the middle of the receiving cavity.

[0017] The beneficial effects are: 1. This utility model pushes the bottom sealing plate into the closed cavity, and the adjusting block simultaneously enters the arc groove and slides along the spiral upward trajectory guided by the groove wall, driving the sealing plate to rise. After the pushing force disappears, the sealing plate descends, and the adjusting block slides in the opposite direction along the arc groove and gets stuck in the locking groove. The sealing plate descends to the preset position to close the bottom of the receiving cavity, realizing convenient shutdown of the fire sprinkler head after accidental triggering. 2. Through the mechanical interlocking of the spiral arc groove and the locking groove, the position of the sealing plate after being accidentally triggered and rising is locked. The locked state can resist water pressure impact. After the adjusting block rises spirally along the arc groove, it falls in the opposite direction under the action of gravity and spring thrust. It is guided by the guide slope to lock into the locking groove to form a lock. At the same time, the arc structure of the locking plate is embedded in the locking groove, and the spring continuously presses the sliding column. The three work together to form a purely mechanical multi-position locking of the sealing plate. After locking, no additional power is needed to resist the fire water pressure and ensure the reliable sealing of the sprinkler head after being accidentally triggered. 3. The ring array blades at the bottom of the sealing plate rotate under the impact of water flow. Through centrifugal force, the water flow is evenly thrown to the surroundings to form a large-scale diffusion spray, avoiding local spray blind spots. At the same time, the rotation disturbs and refines the water mist particles, improving the uniformity of fire extinguishing coverage and cooling efficiency. 4. The clamping plates on both sides of the movable frame cooperate with the vertical guide groove at the top of the enclosed cavity to provide stable guidance for the sealing plate and the adjusting block, ensuring accurate movement trajectory during the upward closing or downward opening of the sealing plate, and avoiding jamming or deviation. 5. The guide slope design of the locking groove guides the adjusting block to slide naturally into the locking groove when it descends, avoiding jamming due to motion inertia or positional deviation, and ensuring the reliability of the locking action. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the cavity of this utility model; Figure 3This is a partial three-dimensional structural schematic diagram of the present invention; Figure 4 This is a cross-sectional view of the closed cavity of this utility model; Figure 5 This is a schematic diagram showing the internal structure of this utility model. Figure 6 This is a utility model Figure 5 A magnified structural diagram at point A; Figure 7 This is a schematic diagram of the internal structure of the enclosed cavity of this utility model; Figure 8 This is a schematic diagram of the structural fit between the rotating column and the blade of this utility model.

[0020] The annotations in the attached figures are explained as follows: 1. Receiving cavity; 2. Enclosed cavity; 201. Movable frame; 202. Clamping plate; 203. Guide groove; 204. Sealing plate; 205. Adjusting block; 206. Arc groove; 207. Locking groove; 207a. Guide slope; 208. Clamping groove; 209. Mounting groove; 3. Locking plate; 301. Sliding column; 302. Spring; 4. Rotating column; 401. Blade; 5. Water inlet pipe; 6. Thermosensitive glass rod; 7. Sealing block. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] See Figures 1-8 As shown, this utility model provides a fire sprinkler head, including a receiving cavity 1 and a closed cavity 2. The receiving cavity 1 is vertically connected, and the closed cavity 2 is fixedly disposed at the bottom opening of the receiving cavity 1 to close the bottom of the receiving cavity 1. A movable frame 201 is slidably arranged in the middle of the closed cavity 2. A sealing plate 204 with the same shape as the opening of the closed cavity 2 is fixed at the bottom of the movable frame 201. The sealing plate 204 can move with the movable frame 201 to close the bottom of the closed cavity 2. Multiple arc-shaped grooves 206 with openings facing the center of the closed cavity 2 and spiraling upward are opened at the bottom of the closed cavity 2. Multiple adjusting blocks 205 with the shape of the bottom opening of the arc-shaped groove 206 are fixed on the outside of the sealing plate 204. The adjusting blocks 205 can drive the movable frame 201 and the clamping plate 202 to rotate and rise in the arc-shaped groove 206. A locking groove 207 is opened on one side of the inner wall of the arc-shaped groove 206 to lock the adjusting block 205 that descends after losing thrust. When a fire sprinkler head is accidentally triggered, pushing the bottom sealing plate 204 allows it to enter the enclosed cavity 2. Simultaneously, the adjusting block 205 enters the arc-shaped groove 206. Guided by the groove wall, the adjusting block 205 slides upward along a spiral trajectory, causing the movable frame 201 and the sealing plate 204 to rotate and rise synchronously. During the ascent, the sealing plate 204 gradually disengages from the bottom opening of the enclosed cavity 2. When the pushing force disappears, the movable frame 201 and the sealing plate 204 descend under gravity. The adjusting block 205 then slides in the opposite direction along the arc-shaped groove 206. When the adjusting block 205 slides to the locking groove 207, it engages in the locking groove 207, preventing the adjusting block 205 from descending further. This locks the movable frame 201 and the sealing plate 204 at the current height. At this point, the sealing plate 204 descends to the preset closed position to seal the bottom of the receiving cavity 1, thereby shutting off the fire sprinkler head.

[0023] See Figures 4-7 As shown, as an optional implementation, the movable frame 201 is fixedly provided with a card plate 202 on both sides, and the top of the closed cavity 2 is provided with vertical guide grooves 203 adapted to the card plate 202 on both sides. The length of the guide groove 203 is equal to the vertical distance between the adjusting block 205 and the card plate 202 so that the adjusting block 205 enters the arc groove 206 after the card plate 202 leaves the guide groove 203. The top of the closed cavity 2 is provided with two card slots 208 that are staggered with the guide grooves 203. With this configuration, when the fire sprinkler head is turned on, the clamping plate 202 is located in the guide groove 203, providing stable guidance for the movable frame 201, the sealing plate 204 and the adjusting block 205, so that the sealing plate 204 maintains a smooth and accurate movement trajectory during the process of moving upward to close the closed cavity 2. Thus, when the clamping plate 202 rises with the sealing plate 204 and leaves the guide groove 203, the adjusting block 205 can accurately enter the arc groove 206. When the adjusting block 205 loses its thrust and descends into the locking groove 207, the locking plate 202 descends synchronously and rotates with the adjusting block 205. Finally, when the adjusting block 205 is locked in the locking groove 207, the locking plate 202 is located at the top of the slot 208. The bottom of the locking plate 202 and the inner wall of the slot 208 are both arc-shaped structures that fit together, which facilitates the docking of the two and allows the locking plate 202 and the adjusting block 205 to jointly bear the water pressure of the fire sprinkler head.

[0024] See Figure 6 As shown, the side of the locking groove 207 near the higher side of the arc groove 206 is a guide slope 207a. The guide slope 207a guides the adjusting block 205 to enter the locking groove 207 when it descends. With this configuration, when the adjusting block 205 slides in the opposite direction along the arc groove 206 to the locking groove 207 area, its sidewall first contacts the guide slope 207a, and under the guidance of the slope, it naturally slides into the locking groove 207, avoiding the inability to enter the locking groove 207 due to motion inertia or positional deviation.

[0025] See Figures 4-6 As shown, a locking plate 3 is provided in the middle of the inner wall of the closed cavity 2. A sliding column 301 is slidably provided in the middle of the locking plate 3. The bottom of the sliding column 301 is fixed to the top of the sealing plate 204 to guide the movement of the sealing plate 204. The middle of the locking plate 3 is also provided with slots distributed in an array around the sliding column 301 to allow water to flow through. The column of the sliding column 301 located between the sealing plate 204 and the locking plate 3 is fitted with a spring 302 to make the adjusting block 205 fit tightly with the bottom of the locking groove 207. With this configuration, when the sealing plate 204 is pushed upward, the sliding column 301 slides upward along the center hole of the locking plate 3. At the same time, the spring 302 is compressed and stores energy. When the thrust disappears, the spring 302 releases its elastic force and acts on the sealing plate 204, pushing the sealing plate 204 and the movable frame 201 to descend rapidly. This causes the adjusting block 205 to slide quickly in the opposite direction along the arc groove 206. When the adjusting block 205 slides to the locking groove 207 area, the elastic force of the spring 302 continues to push the side wall of the adjusting block 205 to press tightly against the bottom of the locking groove 207, ensuring that it is completely locked into the locking groove 207. At this time, the sliding column 301 maintains a vertical guide to the sealing plate 204 under the action of the spring 302, and together with the locking plate 202 and the adjusting block 205, positions the sealing plate 204, effectively preventing the sealing plate 204 from shifting or shaking due to water pressure impact, thereby ensuring a stable and reliable locking state.

[0026] See Figures 1-8 As shown, a rotating column 4 is rotatably mounted on the bottom of the sealing plate 204. Multiple blades 401 arranged in a circular array around the axis of the rotating column 4 are fixed to the bottom of the rotating column 4 to enhance the spray diffusion effect. With this configuration, when the water flows through the receiving cavity 1 and impacts the blades 401, the water flow will drive the blades 401 to rotate. The blades 401 then use centrifugal force to evenly throw the water flow to all sides, forming a large-scale diffusion spray. The circular array distribution of the blades 401 ensures that the water flow is evenly diffused and avoids spray blind spots.

[0027] See Figures 1-2 As shown, a water inlet pipe 5 is fixed in the middle of the top opening of the receiving cavity 1, and a sealing block 7 is interference-connected to the bottom of the water inlet pipe 5. An installation groove 209 is provided on the top of the closed cavity 2, and a thermal glass rod 6 with both ends abutting against the sealing block 7 and the installation groove 209 is placed in the middle of the receiving cavity 1. With this setup, when the ambient temperature reaches the set threshold, the heat-sensitive glass rod 6 breaks due to heat, releasing the support for the sealing block 7. The sealing block 7 falls off under the water pressure in the water inlet pipe 5, and the water flows into the receiving cavity 1 and directly into the receiving cavity 1 in its initial state. The sealing plate 204 is in its initial state at this time and is not closed with the receiving cavity 1. The water flows through the receiving cavity 1 and out through the movable frame 201. The receiving cavity 1 is connected to the closed cavity 2, and the water sprays out to extinguish the fire.

[0028] Using the above structure, when the ambient temperature reaches the set threshold, the heat-sensitive glass rod 6 is heated and breaks, releasing the support for the sealing block 7. The sealing block 7 falls off under the action of water pressure in the water inlet pipe 5, and the water flows directly into the receiving cavity 1 and flows out through the movable frame 201. The receiving cavity 1 is connected to the closed cavity 2. The water flow impacts the blades 401 at the bottom of the sealing plate 204 and drives them to rotate. The blades 401 distributed in a ring array use centrifugal force to evenly throw the water flow to the surroundings to form a large-scale diffusion spray. When a fire sprinkler head is accidentally triggered, the bottom sealing plate 204 is pushed into the enclosed cavity 2, and the adjusting block 205 simultaneously enters the arc-shaped groove 206. Guided by the groove wall, the adjusting block 205 slides along a spiral upward trajectory, causing the movable frame 201 and the sealing plate 204 to rotate and rise. The clamping plate 202 moves upward along the guide groove 203. When the clamping plate 202 disengages from the guide groove 203, the adjusting block 205 precisely enters the arc-shaped groove 206. After the pushing force disappears, the spring 302 releases its elasticity to push the sealing plate 204. As the movable frame 201 accelerates downward, the adjusting block 205 slides in the opposite direction along the arc-shaped groove 206. After the adjusting block 205 contacts the guide slope 207a of the locking groove 207, it naturally slides into the interior of the locking groove 207, and its side wall engages with the groove wall of the locking groove 207. At the same time, the arc-shaped structure at the bottom of the clamping plate 202 is embedded in the top of the clamping groove 208, and the spring 302 continuously pushes the adjusting block 205 to press against the bottom of the locking groove 207. The sealing plate 204 descends to the preset position to close the bottom of the receiving cavity 1, thereby shutting off the fire sprinkler. When a fire sprinkler is accidentally triggered, the bottom sealing plate 204 is pushed into the closed cavity 2. The adjusting block 205 simultaneously enters the arc groove 206 and slides along the spiral upward trajectory guided by the groove wall. After the pushing force disappears, the spring 302 releases its elastic force to push the sealing plate 204 to descend rapidly. The adjusting block 205 slides in the opposite direction along the arc groove 206 and gets stuck in the locking groove 207. The sealing plate 204 descends to the preset position to close the bottom of the receiving cavity 1, thus realizing convenient shutdown of the fire sprinkler after accidental triggering. The mechanical interlock between the spiral arc groove 206 and the locking groove 207 achieves the locking of the rising position of the sealing plate 204 after accidental triggering. The locked state can resist water pressure impact. After the adjusting block 205 spirals up along the arc groove 206, it descends in the opposite direction under the action of gravity and the thrust of the spring 302. It is guided by the guide slope 207a to lock into the locking groove 207 to form a lock. At the same time, the arc structure of the locking plate 202 is embedded in the locking groove 208, and the spring 302 continuously presses against the sliding column 301. The three work together to form a purely mechanical multi-position locking of the sealing plate 204. After locking, it can resist fire water pressure without additional power, ensuring reliable sealing of the sprinkler head after accidental triggering. The ring array blades 401 at the bottom of the sealing plate 204 rotate under the impact of water flow, and the centrifugal force evenly throws the water flow to the surrounding area to form a large-scale diffusion spray, avoiding local spray blind spots. At the same time, the rotation disturbs and refines the water mist particles, improving the uniformity of fire extinguishing coverage and cooling efficiency. The clamping plates 202 on both sides of the movable frame 201 cooperate with the vertical guide groove 203 at the top of the closed cavity 2 to provide stable guidance for the sealing plate 204 and the adjusting block 205, ensuring that the movement trajectory of the sealing plate 204 is accurate during the upward closing or downward opening process, and avoiding jamming or deviation. The guide slope 207a of the locking groove 207 is designed to guide the adjusting block 205 to slide naturally into the locking groove 207 when it descends, so as to avoid jamming due to motion inertia or positional deviation and ensure the reliability of the locking action.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fire sprinkler head, characterized in that: It includes a receiving cavity (1) and a closed cavity (2). The receiving cavity (1) is open from top to bottom, and the closed cavity (2) is fixedly disposed at the bottom opening of the receiving cavity (1) to close the bottom of the receiving cavity (1). A movable frame (201) is slidably provided in the middle of the closed cavity (2). A sealing plate (204) with the same shape as the opening of the closed cavity (2) is fixed at the bottom of the movable frame (201). The sealing plate (204) can move with the movable frame (201) to close the bottom of the closed cavity (2). A plurality of arc-shaped grooves (206) with openings facing the center of the closed cavity (2) and spiraling upward are provided at the bottom of the closed cavity (2). A plurality of adjusting blocks (205) adapted to the shape of the bottom opening of the arc-shaped groove (206) are fixed on the outside of the sealing plate (204). The adjusting blocks (205) can drive the movable frame (201) and the clamping plate (202) to rotate and rise in the arc-shaped groove (206). A locking groove (207) is provided on one side of the inner wall of the arc-shaped groove (206) to lock the adjusting block (205) that descends after losing thrust.

2. The fire sprinkler head according to claim 1, characterized in that: Both sides of the movable frame (201) are fixedly provided with a card plate (202), and both sides of the top of the closed cavity (2) are provided with vertical guide grooves (203) adapted to the card plate (202). The length of the guide groove (203) is equal to the vertical distance between the adjusting block (205) and the card plate (202) so that the adjusting block (205) enters the arc groove (206) after the card plate (202) leaves the guide groove (203).

3. A fire sprinkler head according to claim 2, characterized in that: The side of the locking groove (207) near the higher side of the arc groove (206) is a guide slope (207a), which guides the adjusting block (205) to enter the locking groove (207) when it descends.

4. A fire sprinkler head according to claim 1, characterized in that: A locking plate (3) is provided in the middle of the inner wall of the closed cavity (2). A sliding column (301) is slidably provided in the middle of the locking plate (3). The bottom of the sliding column (301) is fixed to the top of the sealing plate (204) to guide the movement of the sealing plate (204). The locking plate (3) also has slots arranged in an array around the sliding column (301) in the middle to allow water to flow through.

5. A fire sprinkler head according to claim 4, characterized in that: The sliding column (301) located between the sealing plate (204) and the locking plate (3) is fitted with a spring (302) that makes the adjusting block (205) fit tightly against the bottom of the locking groove (207).

6. A fire sprinkler head according to claim 1, characterized in that: The top of the enclosed cavity (2) has two slots (208) that are staggered with the guide groove (203).

7. A fire sprinkler head according to claim 1, characterized in that: The bottom of the sealing plate (204) is rotatably provided with a rotating column (4), and the bottom of the rotating column (4) is fixed with a plurality of blades (401) arranged in a ring array around the axis of the rotating column (4).

8. A fire sprinkler head according to claim 1, characterized in that: A water inlet pipe (5) is fixed in the middle of the top opening of the receiving cavity (1), and a sealing block (7) is interference-connected to the bottom of the water inlet pipe (5). An installation groove (209) is provided on the top of the closed cavity (2). A thermosensitive glass rod (6) with its two ends abutting against the sealing block (7) and the installation groove (209) is placed in the middle of the receiving cavity (1).

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