Fire-fighting spraying structure

Abstract

The utility model discloses a fire-fighting spraying structure, which relates to the technical field of spraying structures and comprises a spraying head and a metal hose connected to a water supply pipeline, one end of the metal hose far away from the water supply pipeline is connected with a hollow fixed pipe, and the spraying head is in threaded connection with one end of the fixed pipe. A reducing channel is arranged at the top in the fixing pipe, an air inlet ring groove located on the same horizontal plane with the reducing channel is formed in the outer wall of the fixing pipe, and a circular groove is formed in the inner ring face of the narrow position of the reducing channel. According to the fire-fighting spraying structure, the effect of freezing in advance can be achieved when the external temperature is too low, water flow at the upper end and the lower end is blocked, the pressure generated when water on the top expands is prevented from being transmitted downwards, the pressure borne by the bottom is reduced, meanwhile, the supporting frame at the bottom can act the pressure generated when the water is frozen on the blocking frame, and the water is prevented from being frozen. And therefore, the protection effect on the thermosensitive element is achieved.

Description

Technical Field

[0001] This utility model relates to the field of sprinkler structure technology, and more specifically to a fire sprinkler structure. Background Technology

[0002] A fire sprinkler system is a fixed, automatic fire suppression system primarily used for fire protection inside buildings. It achieves automatic fire detection and suppression by installing a series of sprinklers with heat-sensitive elements (such as glass bulbs or fusible alloys) in potentially fire-risk areas. Once a fire occurs and the ambient temperature rises to a set activation temperature, these heat-sensitive elements rupture or melt, thereby activating the sprinklers to release water or other extinguishing agents to extinguish the fire.

[0003] Chinese patent application number 202322397662.4 discloses a fire sprinkler head, the structure of which includes a convenient installation mechanism, and an auxiliary mechanism is fixedly installed on the top of the convenient installation mechanism. This fire sprinkler head has the function of improving fire extinguishing efficiency, but it still has the following problems in use:

[0004] Sprinkler heads placed outdoors or in basements are susceptible to the effects of low ambient temperatures, which can cause the fire-fighting water in the pipes to freeze. Once frozen, the water expands in volume, which can damage the temperature-sensing element on the sprinkler head. This can also easily cause damage to the sprinkler head as a whole, thus affecting its overall usability.

[0005] Therefore, it is necessary to propose a fire sprinkler structure to solve the above problems. Utility Model Content

[0006] To address the above problems, this utility model provides a fire sprinkler structure that can prevent the sprinkler head from being damaged due to low temperatures during winter use, and provides protection for the heat-sensitive elements inside the sprinkler head.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A fire sprinkler structure includes a sprinkler head and a metal hose connected to a water supply pipe. The end of the metal hose away from the water supply pipe is connected to a hollow fixed pipe. The sprinkler head is threaded to one end of the fixed pipe. A narrowing channel is provided at the top of the fixed pipe. An air inlet annular groove is provided on the outer wall of the fixed pipe at the same level as the narrowing channel. A circular groove is provided on the inner annular surface of the narrowing channel.

[0009] An annular airbag is connected to one end of the fixed tube away from the narrowing channel. An annular cavity is provided between the outer annular surface of the annular airbag and the fixed tube. A reinforcing rib is fitted on the outer annular surface of the annular airbag. The two ends of the reinforcing rib are connected to the fixed tube.

[0010] The spray head comprises a spray frame, a thermal element located in the spray frame, a blocking frame located on the top of the thermal element, a supporting frame connected to the inside of the spray frame, the blocking frame is sleeved in the supporting frame, and a through hole for water flow is formed in the supporting frame.

[0011] Preferably, an annular frame is arranged in the circular groove, and two ends of the annular frame are connected to the fixed pipe.

[0012] Preferably, an installation clamping groove is arranged on the outer ring surface of the fixed pipe, and the installation clamping grooves are arranged at equal intervals.

[0013] Preferably, a conical surface is arranged on the top of the blocking frame.

[0014] Preferably, a through hole extending into the annular cavity is formed in the outer wall of the fixed pipe.

[0015] Preferably, the top of the fixed pipe is threadedly connected with the metal hose, and the top of the spray frame is threadedly connected with the fixed pipe.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. The air inlet annular groove and the circular groove are arranged in the fixed pipe, the water flow in the circular groove can be frozen first when the external temperature is too low, the water flow at the upper end and the lower end is blocked, the pressure of the water body at the top when expanding is prevented from being transmitted downward, and the pressure borne by the bottom is reduced.

[0018] 2. The annular air bag and the supporting frame are arranged in the fixed pipe, the annular air bag can be deformed to adapt to the expansion pressure of the water body when frozen, meanwhile, the supporting frame at the bottom can bear the pressure of the water body when frozen on the blocking frame, and the thermal element is not affected, so that the thermal element is protected. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the utility model installed on a fire-fighting pipeline;

[0020] Figure 2 It is a schematic view of the water body flowing in the utility model;

[0021] Figure 3 It is a schematic view of the structure of the spray head and the fixed pipe in the utility model.

[0022] REFERENCE SIGNS:

[0023] 100. Spray head; 101. Metal flexible hose; 102. Fixed pipe; 103. Reduction channel; 104. Air inlet ring groove; 105. Circular groove; 106. Annular airbag; 107. Annular cavity; 108. Reinforcing rib; 109. Spray frame; 110. Thermosensitive element; 111. Blocking frame; 112. Support frame; 113. Through hole; 114. Annular frame; 115. Mounting slot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-3 A fire sprinkler structure includes a sprinkler head 100 and a metal flexible hose 101 connected to a water supply pipe. One end of the metal flexible hose 101 is connected to a fire water pipe. A fixed pipe 102 is installed on the ceiling or near the roof via a mounting bracket. The end of the metal flexible hose 101 away from the water supply pipe is connected to a hollow fixed pipe 102. The fixed pipe 102 connects the sprinkler head 100 and the metal flexible hose 101. The sprinkler head 100 is threaded to one end of the fixed pipe 102. A narrowing channel 103 is provided at the top of the fixed pipe 102, through which water flows. Due to the narrowing diameter of the narrowing channel 103, water can pass through. According to the Venturi effect, the flow rate of the water increases at this time. The outer wall of the fixed pipe 102 is provided with an air inlet ring groove 104 at the same level as the narrowing channel 103. The inner ring surface of the narrowing channel 103 is provided with a circular groove 105. The wall thickness of the circular groove 105 located between the air inlet ring grooves 104 becomes narrower. When the outside temperature drops, the water in the circular groove 105 will freeze first. At this time, the frozen part will separate the upper and lower ends. When the water in the metal hose 101 freezes, the expansion pressure will be blocked by the ice in the circular groove 105, and will not continue to be transmitted downward, thus reducing the pressure on the thermal element 110 when the water freezes.

[0026] Even though the ice in the circular groove 105 obstructs the water flow in the metal hose 101, the water in the fixed pipe 102 will still freeze, and the pressure during freezing will still be transmitted to the thermal element 110. The following provides a structure that can accommodate the expansion volume of the water when it freezes in the fixed pipe 102: An annular air bladder 106 is connected to one end of the fixed pipe 102 away from the narrowing channel 103. The annular air bladder 106 is filled with gas. When the water in the fixed pipe 102 freezes, the pressure during expansion will be transmitted to the annular air bladder 106. The annular airbag 106 compresses the gas inside. An annular cavity 107 is provided between the outer ring surface of the annular airbag 106 and the fixing tube 102. When the temperature is too low, the annular airbag 106 will expand towards the annular cavity 107 to increase its capacity during expansion and reduce the pressure transmitted to the thermal element 110. The outer ring surface of the annular airbag 106 is fitted with a reinforcing rib plate 108. The two ends of the reinforcing rib plate 108 are connected to the fixing tube 102. The reinforcing rib plate 108 plays a protective role to prevent excessive deformation.

[0027] Even though the fixed tube 102 has a space to accommodate expansion, some pressure is still transmitted to the thermistor 110. The following is a structure to prevent pressure transmission to the thermistor 110: (See reference) Figure 2 and Figure 3 The spray head 100 includes a spray frame 109, a thermal element 110 located inside the spray frame 109, a blocking frame 111 located on top of the thermal element 110, and a support frame 112 connected inside the spray frame 109. When the thermal element 110 breaks due to high temperature, the blocking frame 111 on top will fall down, thereby connecting the water path. The blocking frame 111 is sleeved inside the support frame 112. The support frame 112 has a through hole 113 for water flow. The through hole 113 is set towards the blocking frame 111, so that the expansion pressure is transmitted to the blocking frame 111 instead of the thermal element 110. This also reduces the pressure on the spray head 100 and avoids damage.

[0028] Specifically, refer to Figure 3 An annular frame 114 is provided inside the circular groove 105. The annular frame 114 serves to protect the air inlet annular groove 104. Both ends of the annular frame 114 are connected to the fixed pipe 102, which allows airflow to enter from one end and exit from the other end.

[0029] Specifically, refer to Figure 1 The outer ring surface of the fixed tube 102 is provided with a mounting slot 115, which facilitates installation on the ceiling by means of a fixing bracket. The mounting slots 115 are evenly spaced.

[0030] Specifically, refer toFigure 3 The top of the blocking frame 111 is provided with a conical surface, which serves to divert water and reduce the impact force on the support frame 112 when the water flows.

[0031] Specifically, the outer wall of the fixed tube 102 is provided with a through hole 113 extending into the annular cavity 107, which is used to connect the annular cavity 107 with the outside world, and can discharge the gas in the annular cavity 107 when the annular airbag 106 deforms.

[0032] Specifically, the top of the fixed pipe 102 is threadedly connected to the metal hose 101, and the top of the spray frame 109 is threadedly connected to the fixed pipe 102. The threaded connection facilitates the disassembly and assembly of the pipes and speeds up the replacement of the spray head 100.

[0033] In this embodiment, the sprinkler head 100 is installed on the fixed pipe 102, and the fixed pipe 102 is installed on the fire pipe through the metal flexible hose 101. It is also installed on the ceiling or roof through the fixing bracket to play a fire protection role. When the outside temperature is too low, the water in the circular groove 105 will freeze first, thereby blocking the water flow at both ends. The annular airbag 106 in the fixed pipe 102 adapts to the expansion when the internal water freezes. At the same time, the water outlet in the sprinkler frame 109 is in a horizontal state and will not act on the heat-sensitive element 110, thus playing a protective role for the heat-sensitive element 110.

[0034] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A fire sprinkler structure, comprising a sprinkler head (100) and a metal flexible hose (101) connected to a water supply pipe, characterized in that: The metal hose (101) is connected to a hollow fixed pipe (102) at the end away from the water supply pipe. The spray head (100) is threaded to one end of the fixed pipe (102). A narrowing channel (103) is provided at the top of the fixed pipe (102). An air inlet annular groove (104) located at the same level as the narrowing channel (103) is provided on the outer wall of the fixed pipe (102). A circular groove (105) is provided on the inner annular surface of the narrow part of the narrowing channel (103). An annular airbag (106) is connected to one end of the fixed tube (102) away from the narrowing channel (103). An annular cavity (107) is provided between the outer annular surface of the annular airbag (106) and the fixed tube (102). A reinforcing rib plate (108) is sleeved on the outer annular surface of the annular airbag (106). Both ends of the reinforcing rib plate (108) are connected to the fixed tube (102). The spray head (100) includes a spray frame (109), a thermal element (110) located inside the spray frame (109), a blocking frame (111) located on top of the thermal element (110), and a support frame (112) connected inside the spray frame (109). The blocking frame (111) is sleeved inside the support frame (112), and the support frame (112) has a through hole (113) for water flow.

2. The fire sprinkler structure according to claim 1, characterized in that: An annular frame (114) is provided inside the circular groove (105), and the two ends of the annular frame (114) are connected to the fixed tube (102).

3. The fire sprinkler structure according to claim 1, characterized in that: The outer ring surface of the fixed tube (102) is provided with mounting slots (115), and the mounting slots (115) are evenly spaced.

4. A fire sprinkler structure according to claim 1, characterized in that: The top of the blocking frame (111) is provided with a conical surface.

5. A fire sprinkler structure according to claim 1, characterized in that: The outer wall of the fixed tube (102) is provided with a through hole (113) extending into the annular cavity (107).

6. A fire sprinkler structure according to claim 1, characterized in that: The top of the fixed tube (102) is threaded to the metal hose (101), and the top of the spray frame (109) is threaded to the fixed tube (102).

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