Fire sprinkler and fire sprinkler system

Abstract

The present invention discloses a fire sprinkler and a fire sprinkler system, which belong to the field of fire prevention equipment, including a yoke arm seat, the lower end of which is connected to a yoke arm frame, a glass tube mounting seat is arranged at a position corresponding to the thermosensitive glass tube on the yoke arm frame, and an inductance circuit for heating the organic solution in the thermosensitive glass tube is arranged on the glass tube mounting seat, and the inductance coil on the inductance circuit is wound around the outer periphery of one end of the thermosensitive glass tube close to the glass tube mounting seat; and also includes a smoke sensor, and the current in the inductance coil changes according to the change of the smoke concentration detected by the smoke sensor. The beneficial effect of the present invention is: the organic solution in the thermosensitive glass tube is heated by the inductance coil, the smoke concentration detected by the smoke sensor is compensated to the temperature of the organic solution, and finally the fire condition is comprehensively reflected by the temperature of the organic solution, and the problem of high expansion temperature and narrow application range of the organic solution in the thermosensitive glass tube is solved without changing the method of breaking the thermosensitive glass tube.

Description

Technical Field

[0001] The present invention relates to the field of fire prevention equipment, and in particular to a fire prevention sprinkler and a fire sprinkler system. Background Art

[0002] Fire sprinklers are used in fire sprinkler systems. When a fire occurs, the medium in the vitreous body at the sprinkler head will reach a certain temperature, causing the vitreous body to rupture. Then, the fire-fighting water will be sprayed out through the sprinkler head splash plate to extinguish the fire. The fire sprinkler head is an indispensable part of the fire protection system. However, even though almost all office buildings, warehouses, public places and other areas are currently equipped with a complete fire sprinkler system, in order for the organic liquid in the vitreous body to expand to the point where the vitreous body ruptures, the temperature usually needs to reach above 60°C. This will lead to the fire situation being aggravated due to the failure to be promptly alleviated and extinguished, which can easily cause significant casualties and property losses.

[0003] For example, the invention patent application with the publication number CN112221054A discloses a fireproof automatic sprinkler, which is provided with an arc-shaped piece made of a memory alloy material. When heated and reaching its critical temperature, the free end of the arc-shaped piece bends toward the bottom side, and the base of the striker is no longer fixed by the plug block and pops out from the sliding cavity under the elastic force of the No. 1 spring at the bottom, so that the striker can hit the glass tube through the connecting pipe and the through hole in turn and break it, and the water flow inside the yoke arm seat flows out from the broken glass tube and accurately and efficiently extinguishes the fire at the fire scene, thereby improving the scope of use and use effect of the sprinkler. However, the way to break the glass body is to heat and bend the arc-shaped piece made of the memory alloy material, so that the striker hits the glass body, which relies on the characteristics of the arc-shaped piece itself, and the structure is relatively complex. It is easy to make identification errors by simply detecting the temperature. Summary of the invention

[0004] In view of the problem that the fire identification lag in the prior art fire sprinkler leads to the aggravation of the fire due to the failure to timely alleviate and extinguish the fire, or the frequent occurrence of fire alarms due to the wrong fire identification, the present invention provides a fire sprinkler and a fire sprinkler system, which uses a smoke sensor to detect the smoke concentration to compensate the temperature in the thermosensitive glass tube, uses the temperature and smoke concentration as two dimensions to judge the fire, and finally achieves the purpose of fire extinguishing and fire prevention by expanding the organic liquid inside the glass body to cause the glass body to rupture. The specific technical scheme is as follows: A fire-prevention sprinkler comprises a hollow yoke arm seat, wherein the upper end of the yoke arm seat is integrated with a threaded pipe, and the lower end thereof is integrated with a yoke arm frame, a plugging cover is provided at the opening of the lower end of the yoke arm seat, and a heat-sensitive glass tube is abutted between the plugging cover and the yoke arm frame; A glass tube mounting seat is arranged on the yoke arm at a position corresponding to the thermosensitive glass tube, and an inductance circuit for heating the organic solution in the thermosensitive glass tube is arranged on the glass tube mounting seat, and the inductance coil on the inductance circuit is wound around the outer periphery of one end of the thermosensitive glass tube close to the glass tube mounting seat; A smoke sensor is also included, and the current in the inductor changes according to the change of the smoke concentration detected by the smoke sensor.

[0005] The organic solution in the thermistor glass tube is heated by an inductor coil, and the smoke concentration detected by the smoke sensor is compensated into the temperature of the organic solution. Finally, the temperature of the organic solution is used to comprehensively reflect the fire situation. Without changing the rupture method of the thermistor glass tube, the problems of high expansion temperature and narrow application range of the organic solution in the thermistor glass tube are solved.

[0006] Preferably, the smoke sensor comprises a shell, a light emitting chamber and a light receiving chamber, a maze is arranged on the inner wall of the shell, the light emitting chamber and the light receiving chamber are located inside the shell, and a light blocking plate for blocking light is also arranged inside the shell.

[0007] Preferably, the smoke sensor is located on the glass tube mounting base, the inductive circuit includes an inductive coil, a power supply and an infrared photoresistor, the infrared photoresistor is located in the receiving light chamber of the smoke sensor, and the infrared photoresistor, the power supply and the inductive coil are connected in series end to end.

[0008] Preferably, the infrared photoresistor is a mixture of one or more of lead sulfide, lead telluride, lead selenide, indium antimonide, antimony cadmium mercury, tellurium tin lead, germanium doped with mercury, and germanium doped with gold.

[0009] In normal environment, the infrared photoresistor cannot receive the infrared light emitted by the emitting light chamber, so the resistance is high and the current passing through the inductor is small. At this time, the temperature of the organic solution is maintained at a low level; when there is smoke, the infrared photoresistor receives the infrared light emitted by the emitting light chamber, the resistance decreases, and the current passing through the inductor increases, causing the temperature of the organic solution to rise; when the smoke reaches the set value, the temperature of the organic solution also rises to the set temperature, realizing the compensation of smoke concentration for temperature.

[0010] Preferably, the smoke sensor is arranged at the outer edge of the lower surface of the yoke arm seat, and a spray controller is arranged on the glass tube mounting seat, the input end of the inductance circuit is connected to the spray controller, and the input end of the spray controller is connected to the output end of the smoke sensor.

[0011] Preferably, at least one temperature sensor is provided at the edge of the lower surface of the yoke arm seat, and the output end of the temperature sensor is connected to the input end of the spray controller.

[0012] Preferably, when the organic solution in the thermosensitive glass tube is heated by the inductance circuit, the relationship between the temperature increase ΔT of the organic solution and the smoke concentration M detected by the smoke sensor is as follows: ; Among them, T1 is the set temperature, T0 is the ambient temperature, M0 is the normal ambient dust concentration, and M1 is the set smoke concentration corresponding to the ambient temperature T0; when the temperature of the organic solution reaches the set temperature, it expands and bursts the thermosensitive glass tube; The ambient temperature T0 is a constant set according to the normal indoor temperature, or is detected by a temperature sensor.

[0013] A spray controller is used to set the set temperature, normal environmental dust concentration, set smoke concentration, and ambient temperature. Then, the temperature at which the organic solution needs to be heated is calculated based on the set smoke concentration detected in real time, and the inductor circuit is controlled to heat it. Among them, the ambient temperature can also be detected by the temperature sensor, so that the corresponding set smoke concentration will also change dynamically. Generally speaking, the higher the ambient temperature, the lower the set smoke concentration. That is, when the ambient temperature is closer to the set temperature, the less temperature needs to be compensated, so the smoke concentration that triggers the glass tube to break will also be lower.

[0014] Preferably, the thermosensitive glass tube is a hollow column with convex spheres at both ends, a strip guide rod is formed inside along the length direction, an external thread is formed on the outer circumference of the strip guide rod, an internal thread is formed on the inner wall of the thermosensitive glass tube, and the density of the internal thread is 2-4 times that of the external thread. Here, since the volume of the thermosensitive glass tube is small, it is necessary to determine the temperature uniformity of the organic solution inside it, so the interior of the thermosensitive glass tube is designed to make the heat exchange between the upper and lower layers of liquid more rapid.

[0015] The present invention also provides a fire sprinkler system, comprising a main controller, a water spray pipe and a plurality of the above-mentioned sprinklers arranged on the water spray pipe, wherein the input end of the main controller is connected to the output end of the smoke sensor and the output end of the temperature sensor, and the output end of the main controller is connected to the input end of the sprinkler controller.

[0016] Preferably, it also includes a heat-sensitive glass window for evacuating smoke, the heat-sensitive glass window is set in the evacuation corridor and / or the smoke-proof staircase, and the four corners of the heat-sensitive glass window are provided with a glass window inductance circuit for heating the glass, and the input end of the glass window inductance circuit is connected to the output end of the main controller. When the smoke in the corridor or staircase reaches a certain concentration, the circuit coil on the inductance circuit will be heated, and as the concentration increases, the temperature further increases, and the glass is broken due to uneven heating, which is conducive to the timely dissipation of thick smoke from the evacuation corridor and staircase.

[0017] Preferably, when the organic solution in the thermosensitive glass tube is heated by an inductive circuit, the relationship between the temperature increase ΔT of the organic solution in each sprayer and the smoke concentration M detected by the smoke sensor is as follows: ; Among them, T1 is the set temperature, T0 is the ambient temperature, M0 is the normal ambient dust concentration, and M1 is the set smoke concentration corresponding to the ambient temperature T2; when the temperature of the organic solution reaches the set temperature, it expands and bursts the thermosensitive glass tube; The ambient temperature T2 is the maximum value detected by all temperature sensors in the same area.

[0018] Here, the ambient temperature T2 takes the maximum value detected by all temperature sensors in the same area. In this way, when the ambient temperature is T2, the corresponding set smoke concentration M1 value is relatively small, that is, the smoke concentration required to trigger the rupture of the thermal glass tube is reduced. In this way, the coordinated operation of multiple sprinklers in the same area can be achieved to avoid the situation where one of the sprinklers cannot be triggered due to unmet conditions, thereby reducing the risk of fire extinguishing and fire prevention efficiency.

[0019] The beneficial effects produced by the technical solution of the present invention are as follows: (1) The organic solution in the thermistor glass tube is heated by an inductor coil, and the smoke concentration detected by the smoke sensor is compensated to the temperature of the organic solution. Finally, the temperature of the organic solution is used to comprehensively reflect the fire situation. Without changing the method of breaking the thermistor glass tube, the problem of high expansion temperature and narrow application range of the organic solution in the thermistor glass tube is solved.

[0020] (2) Under normal circumstances, the infrared photoresistor cannot receive the infrared light emitted by the emitting light chamber, so the resistance is high and the current passing through the inductor is small. At this time, the temperature of the organic solution is maintained at a low level. When there is smoke, the infrared photoresistor receives the infrared light emitted by the emitting light chamber, the resistance decreases, and the current passing through the inductor increases, causing the temperature of the organic solution to rise. When the smoke reaches the set value, the temperature of the organic solution also rises to the set temperature, realizing the compensation of smoke concentration for temperature.

[0021] (3) In the fire sprinkler system, the ambient temperature T2 takes the maximum value detected by all temperature sensors in the same area. In this way, the corresponding set smoke concentration M1 value when the ambient temperature is T2 is relatively small, that is, the smoke concentration required to trigger the rupture of the thermistor glass tube is reduced. This can achieve coordinated operation between multiple sprinklers in the same area, avoiding the risk of one sprinkler being unable to be triggered due to unmet conditions, thereby reducing the risk of fire extinguishing and fire prevention efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the fire protection sprinkler in the first embodiment; Figure 2 It is a schematic diagram of the internal structure of the fire protection sprinkler in the first embodiment; Figure 3 is a schematic diagram of the structure of the smoke sensor in the first embodiment; Figure 4 is a schematic diagram of the structure of the inductor circuit in the first embodiment; Figure 5 This is a schematic diagram of the internal structure of a preferred thermosensitive glass tube of the present invention; Figure 6 It is a schematic diagram of the structure of the fire protection sprinkler in the second embodiment; Figure 7 is a schematic diagram of the structure of the smoke sensor in the second embodiment; Figure 8 It is a control structure diagram of the fire protection sprinkler in the second embodiment; Fig. 9 It is a schematic diagram of the internal structure of a preferred water dispersion rotating member of the present invention; Fig.10 It is a schematic diagram of a top view of a preferred water dispersion rotating member of the present invention; Fig.11 It is a schematic diagram of the structure of the fire sprinkler system in Example 4. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but only represents selected embodiments of the present invention.

[0025] Embodiment 1 like Figure 1-5 As shown, the fire sprinkler 1 comprises a hollow yoke arm seat 11, the upper end of the yoke arm seat 11 is connected with a threaded pipe 12, and the lower end thereof is connected with a yoke arm frame 13, a plugging cover 14 is provided at the opening of the lower end of the yoke arm seat, and a heat-sensitive glass tube 15 is abutted between the plugging cover 14 and the yoke arm frame 13; A glass tube mounting seat 131 is provided on the yoke arm 13 at a position corresponding to the thermosensitive glass tube 15. An inductance circuit 16 for heating the organic solution in the thermosensitive glass tube 15 is provided on the glass tube mounting seat 131. An inductance coil 161 on the inductance circuit 16 is wound around the periphery of one end of the thermosensitive glass tube 15 close to the glass tube mounting seat 131. Preferably, a splash plate 20 is provided on the side of the yoke arm frame 13 away from the yoke arm seat 11 , the glass tube mounting seat 131 is mounted on the splash plate 20 , and an alarm 30 is also provided on the splash plate 20 .

[0026] Here, a smoke sensor 17 is also included, and the current in the inductor 161 changes according to the change of the smoke concentration detected by the smoke sensor 17.

[0027] like Figure 3 As shown, the smoke sensor 17 includes a shell 171, an emitting light chamber 172 and a receiving light chamber 173, a maze 175 is arranged on the inner wall of the shell, the emitting light chamber and the receiving light chamber are located inside the shell 171, and a light blocking plate 174 for blocking light is also arranged inside the shell 171.

[0028] The smoke sensor 17 is located on the glass tube mounting base 131. Figure 4 As shown, the inductance circuit 16 includes an inductance coil 161, a power supply 162 and an infrared photoresistor 163. The infrared photoresistor 163 is located in the light receiving chamber 173 of the smoke sensor 17, and the infrared photoresistor 163, the power supply and the inductance coil 161 are connected in series.

[0029] Here, the infrared photoresistor 163 is a mixture of one or more of lead sulfide, lead telluride, lead selenide, indium antimonide, antimony cadmium mercury, tellurium tin lead, germanium doped with mercury, and germanium doped with gold. At least one temperature sensor 19 is arranged at the edge of the lower surface of the yoke arm seat 11.

[0030] When the organic solution inside the thermosensitive glass tube is heated by the inductance circuit, the relationship between the temperature increase ΔT of the organic solution and the smoke concentration M detected by the smoke sensor is as follows: ; Among them, k is a constant, which can be reversed according to the temperature increase ΔT of the organic solution, and finally realized through the design of the infrared photoresistor. That is, after the infrared photoresistor is determined, k is also determined to be a fixed value.

[0031] In normal environment, the infrared photoresistor cannot receive the infrared light emitted by the emitting light chamber, so the resistance is high and the current passing through the inductor is small. At this time, the temperature of the organic solution is maintained at a low level; when there is smoke, the infrared photoresistor receives the infrared light emitted by the emitting light chamber, the resistance decreases, and the current passing through the inductor increases, causing the temperature of the organic solution to rise; when the smoke reaches the set value, the temperature of the organic solution also rises to the set temperature, realizing the compensation of smoke concentration for temperature.

[0032] like Figure 5 As shown, the thermosensitive glass tube 15 is a hollow column with convex spheres at both ends, and a strip guide rod 151 is formed inside along the length direction, and an external thread is formed on the outer circumference of the strip guide rod 151. An internal thread is formed on the inner wall of the thermosensitive glass tube 15, and the density of the internal thread is 2-4 times that of the external thread. Here, since the volume of the thermosensitive glass tube is small, it is necessary to determine the temperature uniformity of the organic solution inside it, so the interior of the thermosensitive glass tube is designed to make the heat exchange between the upper and lower layers of liquid more rapid.

[0033] Embodiment 2 like Figure 6-8 As shown, the fire sprinkler 1 comprises a hollow yoke arm seat 11, the upper end of the yoke arm seat 11 is connected with a threaded pipe 12, and the lower end thereof is connected with a yoke arm frame 13, a plugging cover 14 is provided at the opening of the lower end of the yoke arm seat, and a heat-sensitive glass tube 15 is abutted between the plugging cover 14 and the yoke arm frame 13; A glass tube mounting seat 131 is provided on the yoke arm 13 at a position corresponding to the thermosensitive glass tube 15. An inductance circuit 16 for heating the organic solution in the thermosensitive glass tube 15 is provided on the glass tube mounting seat 131. An inductance coil 161 on the inductance circuit 16 is wound around the periphery of one end of the thermosensitive glass tube 15 close to the glass tube mounting seat 131. Here, a smoke sensor 17 is also included, and the current in the inductor 161 changes according to the change of the smoke concentration detected by the smoke sensor 17. A splash plate 20 is arranged on the side of the yoke arm frame 13 away from the yoke arm seat 11, and the glass tube mounting seat 131 is mounted on the splash plate 20, and an alarm 30 is also arranged on the splash plate 20.

[0034] The smoke sensor 17 is arranged at the outer edge of the lower surface of the yoke arm seat 11, and the smoke sensor 17 can be an existing conventional smoke sensor. Figure 7As shown, the smoke sensor 17 includes a shell 171, an emitting light chamber 172 and a receiving light chamber 173, a maze 175 is arranged on the inner wall of the shell, the emitting light chamber and the receiving light chamber are located inside the shell 171, and a light blocking plate 174 for blocking light is also arranged inside the shell 171.

[0035] like Figure 8 As shown, a spray controller 18 is arranged on the glass tube mounting base 131, the input end of the inductance circuit 16 is connected to the spray controller 18, and the input end of the spray controller 18 is connected to the output end of the smoke sensor 17; an external input port can be arranged here, connected to the input end of the spray controller 18, for inputting set parameters.

[0036] One or more temperature sensors 19 are arranged at the edge of the lower surface of the yoke arm seat 11 , and the output end of the temperature sensor 19 is connected to the input end of the spray controller 18 .

[0037] When the organic solution in the thermosensitive glass tube 15 is heated by the inductance circuit, the relationship between the temperature increase ΔT of the organic solution and the smoke concentration M detected by the smoke sensor is as follows: ; Among them, T1 is the set temperature, T0 is the ambient temperature, M0 is the normal ambient dust concentration, and M1 is the set smoke concentration corresponding to the ambient temperature T0; when the temperature of the organic solution reaches the set temperature, it expands and bursts the thermosensitive glass tube; The ambient temperature T0 is a constant set according to the normal indoor temperature, or is detected by a temperature sensor.

[0038] A spray controller is used to set the set temperature, normal environmental dust concentration, set smoke concentration, and ambient temperature. Then, the temperature at which the organic solution needs to be heated is calculated based on the set smoke concentration detected in real time, and the inductor circuit is controlled to heat it. Among them, the ambient temperature can also be detected by the temperature sensor, so that the corresponding set smoke concentration will also change dynamically. Generally speaking, the higher the ambient temperature, the lower the set smoke concentration. That is, when the ambient temperature is closer to the set temperature, the less temperature needs to be compensated, so the smoke concentration that triggers the glass tube to break will also be lower.

[0039] like Figure 5As shown, the thermosensitive glass tube 15 is a hollow column with convex spheres at both ends, and a strip guide rod 151 is formed inside along the length direction, and an external thread is formed on the outer circumference of the strip guide rod 151. An internal thread is formed on the inner wall of the thermosensitive glass tube 15, and the density of the internal thread is 2-4 times that of the external thread. Here, since the volume of the thermosensitive glass tube is small, it is necessary to determine the temperature uniformity of the organic solution inside it, so the interior of the thermosensitive glass tube is designed to make the heat exchange between the upper and lower layers of liquid more rapid.

[0040] Embodiment 3 like Figure 2 , 9 As shown in Figure 10, in order to further improve the spraying effect of the fire sprinkler 1, a water dispersing rotating member 40 is arranged in the spraying port of the yoke arm seat 11. The spraying port of the yoke arm seat 11 is an inverted trapezoid, and its inner wall is provided with a plurality of annular protrusions 111 from top to bottom. An annular groove 41 matching the annular protrusions 111 is arranged on the outer wall of the water dispersing rotating member 40, and a positioning ring 112 for positioning the top of the water dispersing rotating member 40 is also arranged in the spraying port. The interior of the water dispersing rotating member is a hollow structure, and a plurality of main dispersing leaves 42 are evenly distributed on its inner wall along the circumferential direction. The main dispersing leaves 42 can be flat plates or curved plates. When a fire occurs in the sprinkler head, the thermosensitive glass tube is broken, and the water flow is directly sprayed to the splash plate and dispersed, so the water droplets are relatively large and uneven. Here, by setting a water dispersion rotating part 40 at the spray port of the yoke arm seat 11, the water flow rotates and diverges outward when falling, and diverges again after contacting the splash plate, which effectively improves the dispersion effect of the water flow and makes the dispersed water droplets smaller and more uniform.

[0041] When the main dispersion blade 42 is a flat plate, the angle between the plane where the main dispersion blade 42 is located and the inner wall section of the yoke arm seat 11 is less than 90°, preferably 60-75°; the angle between the plane where the main dispersion blade 42 is located and the longitudinal section of the yoke arm seat 11 is 5-15°. The setting of the flat plate angle not only divides the water flow into several cavities, but also enables it to drive the water dispersion rotating part 40 to rotate under the impact of the water flow, thereby ensuring the dispersion effect of the water flow spray. In order to further improve the dispersion of the water flow and the uniformity of the water droplet distribution, 1-3 branch dispersion blades are set between the two main dispersion blades 42, such as Fig.10 As shown, there are 10 main dispersion leaves and 20 branch dispersion leaves, and the width of the branch dispersion leaves is greater than that of the main dispersion leaves. It is preferred that the width of the branch dispersion leaves is 1.2-1.8 times that of the main dispersion leaves; and the branch dispersion leaves are arranged at the bottom of the spray port of the yoke arm seat 11, and their height is less than that of the main dispersion leaves, and the height is preferably 0.1-0.3 times that of the main dispersion leaves.

[0042] Embodiment 4 like Fig.11As shown, the fire sprinkler system includes a main controller 2, a water spray pipe and a plurality of the above-mentioned sprinklers 1 arranged on the water spray pipe, the input end of the main controller 2 is connected to the output end of the smoke sensor 17 and the output end of the temperature sensor 19, and the output end of the main controller 2 is connected to the input end of the sprinkler controller 18. An external input port can be provided here, connected to the input end of the main controller 2, for inputting setting parameters.

[0043] Here, it also includes a thermosensitive glass window for evacuating smoke. The thermosensitive glass window is set in the evacuation corridor and / or smoke-proof staircase. The four corners of the thermosensitive glass window are provided with a glass window inductance circuit 51 for heating the glass. The input end of the glass window inductance circuit 51 is connected to the output end of the main controller. A smoke sensor 17 is also provided near the thermosensitive glass window. The heating principle of the glass window inductance circuit 51 is the same as that of the thermosensitive glass tube 15, and its structure is not repeated. When the smoke in the corridor or staircase reaches a certain concentration, the smoke sensor 17 transmits a signal to the main controller, and the main controller controls the circuit coil on the inductance circuit to heat. As the concentration increases, the temperature further increases, and the glass is broken due to uneven heating, which is conducive to the timely dissipation of thick smoke from the evacuation corridor and staircase.

[0044] When the organic solution in the thermosensitive glass tube is heated by the inductive circuit, the relationship between the temperature increase ΔT of the organic solution in each sprayer 1 and the smoke concentration M detected by the smoke sensor 17 is as follows: ; Among them, T1 is the set temperature, T0 is the ambient temperature, M0 is the normal ambient dust concentration, and M1 is the set smoke concentration corresponding to the ambient temperature T2; when the temperature of the organic solution reaches the set temperature, it expands and bursts the thermosensitive glass tube; The ambient temperature T2 is the maximum value detected by all temperature sensors in the same area.

[0045] Here, the ambient temperature T2 takes the maximum value detected by all temperature sensors in the same area, so that when the ambient temperature is T2, the corresponding set smoke concentration M1 value is relatively small, that is, the smoke concentration required to trigger the rupture of the thermistor glass tube is reduced. This can achieve coordinated operation between multiple sprinklers in the same area and avoid the situation where one sprinkler cannot be triggered due to unmet conditions. It performs well in practice and reduces the risk of fire extinguishing and fire prevention efficiency.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fire protection sprinkler, characterized in that: It comprises a hollow yoke arm seat, the upper end of which is integrated with a threaded pipe, and the lower end of which is integrated with a yoke arm frame, a plugging cover is provided at the opening of the lower end of the yoke arm seat, and a heat-sensitive glass tube is abutted between the plugging cover and the yoke arm frame; A glass tube mounting seat is provided on the yoke arm at a position corresponding to the thermosensitive glass tube, and an inductance circuit for heating the organic solution in the thermosensitive glass tube is provided on the glass tube mounting seat, and the inductance coil on the inductance circuit is wound around the outer periphery of one end of the thermosensitive glass tube close to the glass tube mounting seat; A smoke sensor is also included, and the current in the inductor changes according to the change of the smoke concentration detected by the smoke sensor.

2. The fire protection sprinkler according to claim 1, characterized in that: The smoke sensor comprises a shell, a light emitting chamber and a light receiving chamber. A maze is arranged on the inner wall of the shell. The light emitting chamber and the light receiving chamber are located inside the shell. A light blocking plate for blocking light is also arranged inside the shell.

3. A fire protection sprinkler according to claim 2, characterized in that: The smoke sensor is located on the glass tube mounting base, the inductance circuit includes an inductance coil, a power supply and an infrared photoresistor, the infrared photoresistor is located in the light receiving chamber of the smoke sensor, and the infrared photoresistor, the power supply and the inductance coil are connected in series.

4. The fire protection sprinkler according to claim 2, characterized in that: The infrared photoresistor is a mixture of one or more of lead sulfide, lead telluride, lead selenide, indium antimonide, antimony cadmium mercury, tellurium tin lead, germanium doped with mercury, and germanium doped with gold.

5. The fire protection sprinkler according to claim 2, characterized in that: The smoke sensor is arranged at the outer edge of the lower surface of the yoke arm seat, and a spray controller is arranged on the glass tube mounting seat, the input end of the inductance circuit is connected to the spray controller, and the input end of the spray controller is connected to the output end of the smoke sensor.

6. A fire protection sprinkler according to claim 5, characterized in that: One or more temperature sensors are arranged at the edge of the lower surface of the yoke arm seat, and the output end of the temperature sensor is connected to the input end of the spray controller.

7. A fire protection sprinkler according to any one of claims 1 to 6, characterized in that: When the organic solution inside the thermosensitive glass tube is heated by the inductance circuit, the relationship between the temperature increase ΔT of the organic solution and the smoke concentration M detected by the smoke sensor is as follows: ； Among them, T1 is the set temperature, T0 is the ambient temperature, M0 is the normal ambient dust concentration, and M1 is the set smoke concentration corresponding to the ambient temperature T0; when the temperature of the organic solution reaches the set temperature, it expands and bursts the thermosensitive glass tube; The ambient temperature T0 is a constant set according to the normal indoor temperature, or is detected by a temperature sensor.

8. A fire protection sprinkler according to claim 7, characterized in that: The thermosensitive glass tube is a hollow column with convex spheres at both ends, a strip guide rod is formed inside along the length direction, an external thread is formed on the outer circumference of the strip guide rod, an internal thread is formed on the inner wall of the thermosensitive glass tube, and the density of the internal thread is 2-4 times that of the external thread.

9. A fire sprinkler system, characterized in that: It comprises a main controller, a water spray pipe and a plurality of sprinklers as claimed in claim 6 arranged on the water spray pipe, wherein the input end of the main controller is connected to the output end of the smoke sensor and the output end of the temperature sensor, and the output end of the main controller is connected to the input end of the sprinkler controller; It also includes a thermosensitive glass window for evacuating smoke, the thermosensitive glass window is arranged in an evacuation corridor and / or a smoke-proof stairwell, and a glass window inductance circuit for heating the glass is arranged on the four corners of the thermosensitive glass window, and the input end of the glass window inductance circuit is connected to the output end of the main controller.

10. A fire sprinkler system according to claim 9, characterized in that: When the organic solution inside the thermosensitive glass tube is heated by the inductance circuit, the relationship between the temperature increase ΔT of the organic solution in each sprinkler and the smoke concentration M detected by the smoke sensor is as follows: ； Among them, T1 is the set temperature, T0 is the ambient temperature, M0 is the normal ambient dust concentration, and M1 is the set smoke concentration corresponding to the ambient temperature T0; when the temperature of the organic solution reaches the set temperature, it expands and bursts the thermosensitive glass tube; The ambient temperature T0 is the minimum value detected by all temperature sensors in the same area.

Images