Fire-fighting spraying trigger device

Abstract

A fire-fighting spraying triggering device comprises a threaded connector and a supporting table, the threaded connector is fixedly connected with the supporting table, a spraying head is arranged at the bottom of the threaded connector, a blocking mechanism used for blocking the spraying head is arranged at the bottom of the supporting table, and a temperature sensing mechanism is detachably connected to the side face of the supporting table and comprises a cylinder with the upper portion sealed. A spring is arranged in the cylinder, the upper end of the spring abuts against the top of the cylinder, the lower end of the spring is fixedly connected with a movable column, the cylinder is slidably connected with the movable column, the side wall of the cylinder is fixedly connected with a bimetallic strip, the upper portion of the cylinder is fixedly connected with the upper portion of the bimetallic strip, and the lower portion of the bimetallic strip is fixedly connected with an ejector pin which penetrates through the cylinder and abuts against the movable column. The bottom of the cylinder faces the plugging mechanism. The temperature of the bimetallic strip rises, the bimetallic strip is bent towards one side away from the cylinder, the ejector pin is drawn out, the spring presses the movable column downwards, the movable column opens the plugging mechanism, the fire-fighting spray head starts to spray and extinguish fire, and the structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, and in particular to a fire sprinkler triggering device. Background Technology

[0002] Fire sprinkler triggering devices are an important component of fire protection systems. Currently, the main fire sprinkler triggering devices are glass bulb fire sprinkler heads and fusible alloy fire sprinkler heads. Glass bulb fire sprinkler heads use a glass bulb filled with organic solution to block the sprinkler head, while fusible alloy fire sprinkler heads use a fusible alloy to block the sprinkler head. Both types of fire sprinkler heads are disposable triggering devices, and the entire fire sprinkler head needs to be replaced after triggering. However, using a bimetallic strip as a temperature sensing element allows for reuse.

[0003] Utility model patent with publication number CN209092583U discloses a concealed fire sprinkler head, including a sprinkler head with a nozzle, a splash plate, a support base, and a slide rod. The splash plate has a water-blocking head that cooperates with the nozzle. The support base is fixedly installed on the sprinkler head and has a through hole for the slide rod to pass through. One end of the slide rod is connected to the splash plate, and the other end has a hot bimetallic strip. A support spring is sleeved on the slide rod. The two ends of the support spring are respectively pressed against the hot bimetallic strip and the support base. After the hot bimetallic strip is deformed by heat, the support spring will lose the support of the hot bimetallic strip end and spring open.

[0004] In this design, both bimetallic strips on the left and right sides need to deform simultaneously, and the springs will spring open simultaneously due to the loss of bimetallic strip support. This increases the safety risk of the spray head. If the two bimetallic strips deform at different times due to heat, the entire elastic component is prone to left-right imbalance, causing the spray head to fail to open properly. After triggering, the bimetallic strips are trapped inside the springs, making them inconvenient to remove and unsuitable for reuse. In addition, in order to deform in response to temperature, the bimetallic strips are not very hard and cannot withstand high pressure. They can only support limited elastic potential energy, and the springs with low elastic potential energy are also difficult to open the spray head. Utility Model Content

[0005] In view of the above-mentioned prior art, the present invention provides a fire sprinkler triggering device that is reusable and highly safe.

[0006] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0007] A fire sprinkler triggering device includes a threaded connector and a support platform. The threaded connector is fixedly connected to the support platform. A sprinkler head is provided at the bottom of the threaded connector. A sealing mechanism for sealing the sprinkler head is provided at the bottom of the support platform. A temperature sensing mechanism is detachably connected to the side of the support platform. The temperature sensing mechanism includes a cylinder with a sealed upper part. A spring is provided inside the cylinder, with the upper end of the spring abutting against the top of the cylinder. A movable column is fixedly connected to the lower end of the spring. The cylinder and the movable column are slidably connected. A bimetallic strip is fixedly connected to the side wall of the cylinder. The upper part of the cylinder is fixedly connected to the upper part of the bimetallic strip. A pin is fixedly connected to the lower part of the bimetallic strip. The pin penetrates the cylinder and abuts against the movable column. The bottom of the cylinder faces the sealing mechanism.

[0008] Furthermore, the sealing mechanism includes a support base, a connecting rod, and a rubber block. The support base is fixedly connected to the bottom of the support platform, one end of the connecting rod is hinged to the support base, and the other end of the connecting rod is below the movable column. The rubber block is fixedly connected to the middle of the connecting rod and seals the spray head.

[0009] Furthermore, the bimetallic strip is made of brass and Invar alloy, with the brass strip in close contact with the cylinder and the Invar alloy strip on the side away from the cylinder.

[0010] Furthermore, the cylinder is provided with a pin hole, and the size and position of the pin are matched with those of the pin hole.

[0011] Furthermore, the cylinder is equipped with a rod, and the side of the support platform is equipped with a slot, the size and position of which are adapted to the rod and the slot.

[0012] Furthermore, the cylinder is bolted to the support platform for fixation.

[0013] Furthermore, a heat-conducting plate is fixedly connected to the top of the cylinder, and the heat-conducting plate is fixedly connected to the bimetallic strip, with the heat-conducting plate being horizontally positioned.

[0014] Furthermore, a yoke arm is fixedly connected to the bottom of the support platform, and a splash plate is fixedly connected to the yoke arm. The splash plate is horizontally positioned.

[0015] The beneficial effects of this invention are as follows: In the event of a fire, the bimetallic strip heats up and bends away from the cylinder. The ejector pin, fixedly connected to the bimetallic strip, is pulled out of the cylinder. The spring inside the cylinder pushes the movable column downwards, which in turn pushes the right end of the connecting rod downwards. The left end of the connecting rod acts as a support point, causing displacement in the middle of the connecting rod. The rubber block moves downwards, the sprinkler head is unobstructed, and water sprays downwards to extinguish the fire. With this design, the opening of the sprinkler head can be controlled using only one bimetallic strip, resulting in higher safety. Furthermore, after the bimetallic strip cools down, it returns to its original shape. Simply insert the ejector pin into the ejector pin hole to block the movable column, return the connecting rod to its original position, and allow the rubber block to block the sprinkler head, enabling repeated use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a fire sprinkler triggering device according to the present invention;

[0017] Figure 2 This is an enlarged schematic diagram of part A of a fire sprinkler triggering device according to this utility model;

[0018] Figure 3 This is a schematic diagram showing the connection between the temperature sensing mechanism and the support platform of a fire sprinkler triggering device according to this utility model.

[0019] The following are the reference numerals: 1. Threaded connector; 2. Support platform; 3. Spray head; 4. Rubber block; 5. Support base; 6. Connecting rod; 7. Cylinder; 8. Spring; 9. Movable column; 10. Ejector pin; 11. Bimetallic strip; 12. Ejector pin hole; 13. Insert rod; 14. Slot; 15. Yoke arm; 16. Splash plate; 17. Heat-conducting plate. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the utility model.

[0021] See attached document Figures 1 to 3 This utility model provides a fire sprinkler triggering device, including a threaded connector 1 and a support platform 2. The threaded connector 1 is fixedly connected to the support platform 2. A sprinkler head 3 is provided at the bottom of the threaded connector 1. A sealing mechanism for sealing the sprinkler head 3 is provided at the bottom of the support platform 2. A temperature sensing mechanism is detachably connected to the side of the support platform 2. The temperature sensing mechanism includes a cylinder 7. The upper part of the cylinder 7 is sealed. A spring 8 is provided inside the cylinder 7. The upper end of the spring 8 abuts against the top of the cylinder 7. A movable column 9 is fixedly connected to the lower end of the spring 8. The cylinder 7 is slidably connected to the movable column 9. A bimetallic strip 11 is fixedly connected to the side wall of the cylinder 7. The upper part of the cylinder 7 is fixedly connected to the upper part of the bimetallic strip 11. A pin 10 is fixedly connected to the lower part of the bimetallic strip 11. The pin 10 penetrates the cylinder 7 and abuts against the movable column 9. The bottom of the cylinder 7 faces the sealing mechanism. When a fire occurs, the bimetallic strip 11 is heated and its upper end is fixedly connected to the cylinder. The lower end of the bimetallic strip 11 bends away from the cylinder 7. The pin 10 fixed at the lower end of the bimetallic strip 11 is pulled away from the cylinder 7. The spring 8 inside the cylinder 7 squeezes the movable column 9 to move downward, opening the sealing mechanism. The sprinkler head 3 loses its seal, and water flows downward to extinguish the fire.

[0022] Preferably, the sealing mechanism includes a support base 5, a connecting rod 6, and a rubber block 4. The support base 5 is fixedly connected to the bottom of the support platform 2. One end of the connecting rod 6 is hinged to the support base 5, and the other end of the connecting rod 6 is below the movable column 9. The rubber block 4 is fixedly connected to the middle of the connecting rod 6, and the rubber block 4 seals the sprinkler head 3. The left end of the connecting rod 6 is hinged to the support base 5. In the event of a fire, the movable column 9 presses down on the right end of the connecting rod 6, causing the connecting rod 6 to rotate downwards. The rubber block 4 fixed in the middle of the connecting rod 6 is then pulled out of the sprinkler head 3, and the water flow continues normally.

[0023] Preferably, the bimetallic strip 11 is a combination of brass and Invar alloy. The brass strip is in close contact with the cylinder 7, while the Invar alloy strip is on the side away from the cylinder 7. Brass has a larger coefficient of thermal expansion, while Invar alloy has a very small coefficient of thermal expansion. In the event of a fire, the brass expands due to heat, increasing its length, while the Invar alloy changes its length very little. This controls the brass to bend towards the side away from the cylinder 7, causing the ejector pin 10, which is fixedly connected to the bimetallic strip 11, to move to the right and thus be pulled away from the cylinder 7. The ejector pin 10 is welded to the bimetallic strip 11 to prevent it from falling off.

[0024] Preferably, the cylinder 7 is provided with a pin hole 12, and the size and position of the pin 10 and the pin hole 12 are adapted to each other. This ensures that the pin 10 can be smoothly inserted into the cylinder 7 to block the movable column 9, and can also be smoothly pulled out. The pin 10 is made of high-strength alloy to ensure the hardness and toughness of the pin 10. The bottom of the movable column 9 is smooth to reduce the friction force when the pin 10 is pulled out.

[0025] Preferably, the cylinder 7 is provided with a rod 13, and the side of the support platform 2 is provided with a slot 14, the size and position of the rod 13 and the slot 14 being compatible. The temperature sensing mechanism is inserted into the support platform 2, which allows for easy disassembly and installation, and facilitates the replacement of the temperature sensing mechanism.

[0026] Preferably, the cylinder 7 is bolted to the support platform 2. The bolted connection between the temperature sensing mechanism and the support platform 2 facilitates disassembly and installation, and also enhances sturdiness and safety.

[0027] Preferably, a heat-conducting plate 17 is fixedly connected to the top of the cylinder 7, and the heat-conducting plate 17 is fixedly connected to the bimetallic strip 11. The heat-conducting plate 17 is horizontally arranged. A vertically arranged bimetallic strip 11 is not conducive to the deformation of the bimetallic strip when heated. The horizontal heat-conducting plate 17 at the top of the cylinder 7 increases the heating area, thereby accelerating the heating rate of the bimetallic strip 11 and improving the response speed of the temperature sensing mechanism.

[0028] Preferably, a yoke arm 15 is fixedly connected to the bottom of the support platform 2, and a splash plate 16 is fixedly connected to the yoke arm 15. The splash plate 16 is horizontally positioned. The water sprayed from the sprinkler head 3 is splashed by the splash plate 16, enabling fire extinguishing at a relatively distant location.

[0029] Working principle: When a fire occurs on site, the heat-conducting plate 17 accelerates the absorption of heat and transfers it to the bimetallic strip 11. Since the length of the brass alloy changes very little, while the length of the copper changes more, the lower part of the bimetallic strip 11 bends away from the cylinder 7. The ejector pin 10 connected to the lower part of the bimetallic strip 11 is pulled out of the ejector pin hole 12. The spring 8 pushes the movable column 9 to move downward. The movable column 9 pushes the right end of the connecting rod 6 to move downward. The left end of the connecting rod 6 is hinged to the support seat 5. The connecting rod 6 rotates downward. The rubber block 4 fixedly connected to the middle of the connecting rod 6 moves downward and away from the sprinkler head 3, so that the water in the threaded joint 1 is sprayed out from the sprinkler head 3. After passing through the splash plate 16 below, it sprays water around to extinguish the fire.

[0030] The above are merely specific embodiments 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. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A fire sprinkler triggering device, comprising a threaded connector (1) and a support platform (2), wherein the threaded connector (1) is fixedly connected to the support platform (2), characterized in that: The bottom of the threaded connector (1) is provided with a spray head (3), and the bottom of the support platform (2) is provided with a sealing mechanism for sealing the spray head (3). The side of the support platform (2) is detachably connected with a temperature sensing mechanism. The temperature sensing mechanism includes a cylinder (7). The upper part of the cylinder (7) is sealed. A spring (8) is provided inside the cylinder (7). The upper end of the spring (8) abuts against the top of the cylinder (7). The lower end of the spring (8) is fixedly connected to a movable column (9). The cylinder (7) and the movable column (9) are slidably connected. A bimetallic strip (11) is fixedly connected to the side wall of the cylinder (7). The upper part of the cylinder (7) is fixedly connected to the upper part of the bimetallic strip (11). The lower part of the bimetallic strip (11) is fixedly connected to a pin (10). The pin (10) penetrates the cylinder (7) and abuts against the movable column (9). The bottom of the cylinder (7) is directly opposite the sealing mechanism.

2. The fire sprinkler triggering device according to claim 1, characterized in that: The sealing mechanism includes a support base (5), a connecting rod (6), and a rubber block (4). The support base (5) is fixedly connected to the bottom of the support platform (2). One end of the connecting rod (6) is hinged to the support base (5), and the other end of the connecting rod (6) is below the movable column (9). The rubber block (4) is fixedly connected to the middle of the connecting rod (6), and the rubber block (4) seals the spray head (3).

3. A fire sprinkler triggering device according to claim 2, characterized in that: The bimetallic strip (11) is a combination of brass and Invar alloy, with the brass strip in close contact with the cylinder (7) and the Invar alloy strip on the side away from the cylinder (7).

4. A fire sprinkler triggering device according to claim 3, characterized in that: The cylinder (7) is provided with a pin hole (12), the pin (10) is adapted to the size of the pin hole (12), and the position of the pin (10) is adapted to the pin hole (12).

5. A fire sprinkler triggering device according to claim 4, characterized in that: The cylinder (7) is provided with a rod (13), and the side of the support platform (2) is provided with a slot (14). The size and position of the rod (13) and the slot (14) are adapted to each other.

6. A fire sprinkler triggering device according to claim 4, characterized in that: The cylinder (7) is bolted to the support platform (2).

7. A fire sprinkler triggering device according to claim 1, characterized in that: A heat-conducting plate (17) is fixedly connected to the top of the cylinder (7), and the heat-conducting plate (17) is fixedly connected to the bimetallic strip (11). The heat-conducting plate (17) is arranged horizontally.

8. A fire sprinkler triggering device according to claim 1, characterized in that: The bottom of the support platform (2) is fixedly connected to a yoke arm (15), and the yoke arm (15) is fixedly connected to a splash plate (16), which is horizontally arranged.

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