A closed-type automatic sprinkler head with a rotating track tilting mechanism

Abstract

The application discloses a closed automatic sprinkler with cycloid rail overturning mechanism, which comprises a closed sprinkler, a trigger lever mechanism, an overturning mechanism and a cycloid rail, wherein the closed sprinkler is arranged on the overturning mechanism, the overturning mechanism is arranged on the cycloid rail, the trigger lever mechanism is movably arranged on the top of the cycloid rail and forms a lever structure, one end of the trigger lever mechanism is connected with the overturning mechanism, and the other end is located directly above the closed sprinkler. The novel installation structure type can realize temperature sensing starting of the closed sprinkler and position transformation and overturning of the water spraying fire extinguishing sprinkler, greatly reduces the arrangement difficulty of the sprinkler, reduces the number of sprinklers arranged in a specified action area, reasonably reduces the self-spraying design flow under the premise of meeting the specification requirements, and saves the investment cost of fire-fighting water supply facilities.

Description

Technical Field

[0001] This invention relates to the field of fire sprinkler technology, specifically to a closed automatic sprinkler head with a rotating wheel track flipping mechanism. Background Technology

[0002] Automatic sprinkler systems (hereinafter referred to as sprinkler systems) are recognized worldwide as one of the most effective automatic fire extinguishing facilities, and are the most widely used and deployed automatic fire extinguishing systems. Sprinkler systems have been used abroad for over 200 years. In my country, the Shanghai Wool Textile Factory began installing sprinkler systems as early as 1926. Domestic and international application practices have proven that this system has advantages such as safety, reliability, cost-effectiveness, and a high success rate in extinguishing fires, playing a crucial role in preventing the spread of fires and suppressing initial fires in buildings.

[0003] Sprinkler systems are further divided into closed systems and open systems based on the type of sprinkler heads used. According to statistics from actual engineering applications, closed sprinkler systems account for over 90% of applications, making them the most commonly used type of fixed fire suppression system. The most important characteristic of a closed sprinkler system is the use of closed sprinkler heads. A closed sprinkler head is a component that can autonomously sense temperature and directly spray water for fire suppression. It is a sprinkler head equipped with a temperature-sensitive element and its sealing components. This temperature-sensitive element can activate within a predetermined temperature range, causing the element and its sealing components to detach from the sprinkler head body. The nozzle then sprays water at a predetermined volume, and the water flow is reflected and dispersed by the deflector plate into a predetermined spray pattern, extinguishing the fire within a designated protected area.

[0004] Closed-type sprinkler heads are a key component of automatic sprinkler systems. They open after being heated by the hot air currents from a fire, spraying water and activating the system. The proper placement of these sprinkler heads determines their timely activation and the prescribed spray intensity. Therefore, on the one hand, sprinkler heads need to be placed in locations easily accessible to the hot air currents from the ceiling or below the suspended ceiling. Standards require that the distance between the sprinkler head's deflector and the ceiling be no more than 150mm, which facilitates the timely activation of the sprinkler head's heat-sensitive element. On the other hand, it is also necessary to ensure even water distribution, minimizing obstruction of the water flow before it reaches the fire area on the ground. In practical engineering, except for buildings with suspended ceilings where sprinkler heads can be arranged according to the maximum spacing allowed by the specifications, the arrangement of sprinkler heads is inevitably affected by obstacles (such as beams, ducts, cable trays, etc.) in most other cases. The "Code for Design of Automatic Sprinkler Systems" GB50084-2017 specifies the permissible relative positional relationship between sprinkler heads and nearby obstacles. To meet the requirements of the code as much as possible, sprinkler heads often need to be arranged with shorter spacing and denser density. Even when this is still not possible, it is necessary to consider adding sprinkler heads under the surface of obstacles near the sprinkler heads to compensate for the water volume that cannot reach the fire due to the obstruction of the sprinkler head's spray. The ultimate result of all these situations is an increase in the number of sprinkler heads, the corresponding increase in the materials of the pipes and control valve assemblies, and the increase in the design water volume of the automatic sprinkler system due to the increased number of sprinkler heads within the required effective area of ​​the code. Consequently, the capacity of the fire water tank and the specifications of the fire pump need to be increased, ultimately resulting in an increase in the overall investment in fire protection facilities. Furthermore, due to the presence of obstacles and the varying positions of the sprinklers relative to their surroundings, the overall installation height and spacing of the sprinklers cannot be kept consistent. This results in a cluttered and unsightly appearance on the building's ceiling, negatively impacting the visual effect of the interior space. In many cases, additional sprinklers are needed at the bottom of beams and ducts, making these additional sprinklers appear obtrusive within the interior clearance and significantly affecting the visual appeal of the space.

[0005] The above problems mainly arise because the two functional requirements of closed sprinkler heads—timely fire detection and uniform water spraying for fire extinguishing—have conflicting requirements regarding the sprinkler head's installation height. Currently, in practical engineering applications, the heat-sensitive element and its sealing components of closed sprinkler heads are all integrated within the sprinkler head base frame. This type of sprinkler head cannot effectively resolve the contradiction between the two functional requirements of closed sprinkler heads. Therefore, how to reconcile this contradiction, and how to further improve the fire detection sensitivity and water spray uniformity of sprinkler heads by improving the installation method, has become a crucial issue that must be considered when inventing a closed sprinkler head installation method. Summary of the Invention

[0006] To address the above-mentioned problems, this invention provides a closed-type automatic sprinkler head with a rotating wheel track flipping mechanism that is quick to install, highly responsive, and avoids obstruction.

[0007] The technical solution of the present invention is as follows:

[0008] A closed-type automatic sprinkler head with a rotating wheel track flipping mechanism includes a closed sprinkler head, a trigger lever mechanism, a flipping mechanism, and a rotating wheel track. The closed sprinkler head is mounted on the flipping mechanism, which is mounted on the rotating wheel track. The trigger lever mechanism is movably mounted on the top of the rotating wheel track and forms a lever structure. One end of the trigger lever mechanism is limited by the flipping mechanism, and the other end is located directly above the closed sprinkler head.

[0009] A closed-type automatic sprinkler head with a rotating track flipping mechanism also includes a stainless steel metal hose, one end of which is connected to the closed-type sprinkler head and fixed on the flipping mechanism, and the other end is connected to the water distribution pipe of the sprinkler system.

[0010] Furthermore, a tension spring is provided on the rotating wheel track, with one end of the tension spring fixed on the rotating wheel track and the other end connected to the flipping mechanism.

[0011] Furthermore, the flipping mechanism includes a stator and a mover, the stator and the mover being connected concentrically. The stator consists of a circular steel plate with a central hole and a track plate A at one end; the mover consists of two circular steel plates, which are fixed by a concentric metal shaft, and the metal shaft passes through the central hole of the stator. The assembled stator and mover can rotate around the metal shaft; the outer sides of the two circular steel plates of the mover are respectively connected to the track plate B and the nozzle slot.

[0012] Furthermore, the rotating track consists of two tracks on the same plane. One track is a straight track, and the other track is a rotating track. The two ends of the rotating track are straight pipe sections, and the middle section is a 180° rotating track.

[0013] Furthermore, the track perforated plate A and track perforated plate B of the flipping mechanism are respectively connected to the two tracks of the rotating track, wherein the straight track is connected to the round hole on the track perforated plate A, and the flipping track is connected to the round hole on the track perforated plate B.

[0014] Furthermore, the fulcrum of the trigger lever mechanism is fixed to the top of the rotary track, and one end of the long lever arm of the trigger lever mechanism is connected to a hat-shaped rigid thin plate and is located directly above the nozzle; one end of the short lever arm of the trigger lever mechanism is set as a metal buckle, which can fix the stator of the stretched flipping mechanism to the top of the rotary track.

[0015] Furthermore, the force exerted on the top of the trigger lever mechanism at the moment the closed sprinkler head starts spraying water causes the trigger lever mechanism to rotate, causing the flipping mechanism to disengage from the limit state and move downward along the wheel track. During the downward movement, the flipping mechanism drives the closed sprinkler head to rotate 180°, changing the spraying position and direction of the closed sprinkler head from upward spraying to downward spraying.

[0016] The beneficial effects of this invention are as follows:

[0017] 1) The new installation structure can realize the temperature-sensing start of closed sprinkler heads and the change and flipping of the position of water extinguishing sprinkler heads, which greatly reduces the difficulty of sprinkler head layout, reduces the number of sprinkler heads within the specified effective area, and reasonably reduces the design flow rate of automatic sprinkler while meeting the requirements of the specifications, thus saving the investment cost of fire water supply facilities.

[0018] 2) When the sprinkler system is installed in a space with obstacles such as beams, the novel structural design of the present invention, in the pre-operation state, has the closed sprinkler head installed vertically upwards, and the temperature sensing element at the top of the sprinkler head is set close to the top surface, which is conducive to contact with the hot airflow of the fire, thereby improving the sensitivity of the sprinkler system to start and making it easier to extinguish and control the fire at an early stage.

[0019] 3) When self-sprinklers are installed in spaces with obstacles such as beams, the novel structural design of this invention, when the hot airflow of the initial fire triggers the temperature-sensing element nozzle to spray water, the nozzle position will move down along the track. At the same time, the nozzle direction will be rotated 180°, and the water outlet direction will change to downward spray. The nozzle position will move down to the bottom of the spatial obstacle, so that the water spray path is not blocked by the spatial obstacle and reaches the fire source below, which fully ensures the uniformity of fire extinguishing and improves the effectiveness of fire extinguishing.

[0020] 4) The novel structural design described in this invention does not require structural adjustments to the closed sprinkler head itself. It eliminates the need for professional fire safety testing and certification of the sprinkler head's performance; the above functions can be achieved using a standard closed sprinkler head, which is inexpensive and readily available. This novel structural design allows for repeated use and facilitates routine maintenance and management.

[0021] 5) The rotary track tilting mechanism of the present invention, which is linked with the closed automatic sprinkler head, has a simple structure, is safe and reliable, and is easy to disassemble and assemble. It is also equipped with a stainless steel metal hose connection, which has a large adjustment range and can be flexibly adjusted according to changes in spatial obstacles. It is very suitable for use in later interior decoration and renovation projects. Attached Figure Description

[0022] Figure 1 To invent the overall installation structure diagram;

[0023] Figure 2Front view of the invention's flipping mechanism;

[0024] Figure 3 Rear view of the invention's flipping mechanism;

[0025] Figure 4 Top view of the invention's flipping mechanism;

[0026] Figure 5 Left view of the invention's flipping mechanism;

[0027] Figure 6 Assembly diagram of the partial flipping mechanism, the rotating wheel track, and the trigger lever mechanism for the invention;

[0028] Figure 7 This is a schematic diagram of the invention's operation;

[0029] Figure 8 A schematic diagram of the normal installation state of the invention;

[0030] Figure 9 This is a schematic diagram showing the installation process after the invention is completed;

[0031] In the diagram: 1. Stainless steel metal hose; 2. Closed sprinkler head; 3. Trigger lever mechanism; 4. Tilting mechanism; 4.1. Stator; 4.1.1. Track orifice plate A; 4.2. Mover; 4.2.1. Track orifice plate B; 4.2.2. Sprinkler slot; 5. Rotary wheel track; 6. Tension spring. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 As shown, a closed automatic sprinkler head with a rotating wheel track flipping mechanism mainly includes a stainless steel metal hose 1, a closed sprinkler head 2, a trigger lever mechanism 3, a flipping mechanism 4, a rotating wheel track 5, and a tension spring 6.

[0034] The closed sprinkler head 2 is a qualified product that meets fire protection certification. One end of the stainless steel metal hose 1 is connected to the sprinkler head and fixed in the sprinkler head slot on the flipping mechanism 4, and the other end is firmly connected to the water distribution pipe of the sprinkler system. The length of the stainless steel metal hose 1 should be sufficient to ensure that the closed sprinkler head 2 can move flexibly within a certain range.

[0035] like Figure 3 , 4 As shown in Figure 5, the flipping mechanism 4 is installed... Figure 2The assembly mainly consists of two parts: a stator 4.1 and a mover 4.2. The stator 4.1 is shaped like a ping-pong paddle and is composed of a circular steel plate with a hole in the center and a track hole 4.1.1 at one end. The mover 4.2 is composed of two circular steel plates, which are fixed by a concentric metal shaft. The metal shaft passes through the central hole of the stator 4.1, allowing the assembled stator 4.1 and mover 4.2 to rotate flexibly around the metal shaft. The outer sides of the two circular steel plates of the mover 4.2 are connected to the track hole 4.2.1 and the nozzle slot 4.2.2, respectively. The centers of the two circular holes 4.1.1 (connected to the stator 4.1) and 4.2.1 (connected to the mover 4.2) are on the same plane, allowing them to move synchronously along the rotating track 5 after assembly. The track hole 4.2.1 can rotate freely on the mover 4.2, ensuring that the track hole 4.2.1 causes the disc of the mover 4.2 to rotate 180° when passing through the rotary track. The nozzle slot 4.2.2 connected to the disc on the other side of the mover 4.2 is used to reliably fix the closed sprinkler head 2.

[0036] like Figure 6 As shown, the cycloidal track 5 is made of steel with a smooth surface. It consists of two tracks connected and fixed at both ends. One track is a straight line, and the other track has straight pipe sections at both ends and a 180° cycloidal track in the middle (Note: a cycloidal track is also called a circular rolling line or a cycloid; it is the trajectory of a fixed point on the circumference of a circle rolling on a fixed straight line). The straight track is fitted with the track hole 4.1.1 on the stator 4.1 of the flipping mechanism 4, and the cycloidal track is fitted with the track hole 4.2.1 on the mover 4.2 of the flipping mechanism 4.

[0037] A tension spring 6 is installed on the straight track of the rotary track 5. One end of the tension spring 6 is fixed to the bottom of the straight track, and the other end is fixed to the stator 4.1 of the flipping mechanism 4.

[0038] The trigger lever mechanism 3, made of hard metal, is firmly fixed to the top of the rotary track 5 with bolts at its fulcrum. Two lever arms, one long and one short, are located at both ends of the lever, allowing free rotation around the fulcrum. One end of the short lever arm of the trigger lever mechanism 3 is fitted with a metal clip, on which a tension spring 6 and the flipping mechanism 4 of the closed sprinkler head 2 are installed. As the mechanism moves upwards along the rotary track 5 to the top, the metal clip of the short lever arm of the trigger lever mechanism 3 fixes the position of the flipping mechanism 4, and the tension spring 6 is at its maximum tension. At this point, the combined structure establishes a stable equilibrium. The closed sprinkler head 2 is connected to the automatic spray pipe via a metal hose 1, and the automatic spray system is in a ready-to-operate state.

[0039] One end of the long lever arm of the trigger lever mechanism 3 is connected to a hat-shaped rigid metal cover. When the closed sprinkler head 2 is in the working state, the metal cover is located directly above the sprinkler head, and ensures that the metal cover can bear enough water spray from the sprinkler head at the moment of start-up. The power of the water spray on the metal cover is sufficient to overcome the resistance borne by the short lever arm of the trigger lever mechanism 3, causing the trigger lever mechanism 3 to rotate, thereby breaking the mechanical balance state constructed by the trigger lever mechanism 3, the flipping mechanism 4, the rotary wheel track 5 and the tension spring 6.

[0040] The mechanical structure, consisting of trigger lever mechanism 3, flipping mechanism 4, rotating wheel track 5, and tension spring 6, will re-establish a new equilibrium state in a very short time. See details... Figure 7 Before the nozzle is triggered, it is fixed vertically upward on the mover 4.2 of the flipping mechanism 4. When the hot airflow on the top surface accumulates and heats up, causing the nozzle to start spraying water, the trigger lever mechanism 3 directly above the nozzle is rotated by the impact of the water flow. The metal buckle of the short lever arm used to fix the flipping mechanism 4 is disengaged. The flipping mechanism 4 will move downward along the rotary track 5 under the action of the tension spring 6. When it moves past the rotary track, the mover 4.2 of the flipping mechanism 4, together with the closed sprinkler head 6 fixed on it, rotates 180° and continues to move downward along the track to the bottom of the rotary track 5, and returns to a balanced state.

[0041] like Figure 8 , Figure 9 As shown, a preferred application example of the rotary track flipping mechanism for the linkage installation of the closed automatic sprinkler head of the present invention is illustrated.

[0042] Example 1:

[0043] In building locations where a closed-loop automatic sprinkler system is required, and where the building roof is irregular and there are large spatial obstacles such as tall roof structural beams, trusses, and large air ducts, the closed-loop automatic sprinkler head installed using this invention can still ensure that the initial installation position of the sprinkler head is as close to the roof surface as possible, guaranteeing the sprinkler head's temperature sensing performance. Furthermore, by selecting an appropriate length of track and metal hose based on the vertical distance the sprinkler head needs to avoid surrounding obstacles, and adhering to the principle that the sprinkler head's spray curve is not affected by nearby obstacles, the installation height can be appropriately raised to achieve a concealed and aesthetically pleasing installation.

[0044] Example 2:

[0045] In building sites where a closed-loop sprinkler system is required, if the building roof is irregular and there are tall, wide, and large obstacles such as structural beams, air ducts, and cable trays, but the number of such obstacles is small, conventional closed-loop sprinkler heads can be used. For sprinkler heads near local tall, wide, and large obstacles where the water spray is obstructed, the rotary track tilting mechanism described in this invention is used to install the closed-loop automatic sprinkler heads. This avoids the requirement to add sprinkler heads under tall obstacles, reduces costs, and also ensures that the sprinkler heads are concealed and aesthetically pleasing.

[0046] Example 3:

[0047] In buildings requiring closed-loop sprinkler systems, irregular roof surfaces and complex spatial obstacles are common, and the project may require future adjustments and modifications, such as altering the ceiling, adding or adjusting ceiling ducts, or installing cable trays. Conventional modifications typically involve rearranging the existing sprinkler lines, resulting in significant workload and costs. However, the rotating track tilting mechanism described in this invention simplifies the installation of closed-loop automatic sprinkler heads. Its reusable and easily disassembled features, along with the adjustable metal hoses, greatly simplify the sprinkler system modification process. Furthermore, the sprinkler system can be operated online throughout the modification process, eliminating the need to drain the water from the sprinkler network. This ensures the system continues to function normally during construction, guaranteeing the building's fire safety.

[0048] In the three embodiments described above, by determining the top mounting position of the sprinkler head and the distance between the splash plate and the bottom of the obstacle, the length of the rotary track can be determined, and the track can be fixed to the structural beams of the building. The schematic diagram of the rotary track flipping mechanism of the closed-type automatic sprinkler head linkage installation of the present invention is shown in detail during normal installation. Figure 5 .

[0049] When a fire occurs, hot air rises from the burning area. When the ambient temperature at the top exceeds the operating temperature of the temperature sensing element, such as 68℃ / 79℃ (i.e., the temperature at which the temperature sensing glass bulb breaks), the closed sprinkler head 2 sprays water. The water impact triggers the metal cover on top of the lever mechanism 3. The lever rotates, causing the flipping mechanism 4 to disengage from its limit position. Under the action of the tension spring 6, it moves downward along the rotating wheel track 5. During the downward movement, the flipping mechanism 4 drives the closed sprinkler head 2 to rotate 180°, changing the spraying direction from upward to downward. At this time, the nozzle has avoided the influence of surrounding spatial obstacles and sprays evenly onto the fire area below to extinguish the fire.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions and not to limit them; although the preferred embodiments are described in detail, those skilled in the art should understand that modifications can still be made to the specific implementation of this case or equivalent substitutions can be made to some technical features without departing from the spirit of this technical solution, and all such modifications and substitutions should be covered within the scope of the technical solution claimed in this case.

Claims

1. A closed automatic sprinkler with a cycloid track flip mechanism, characterized in that, The utility model provides a kind of closed sprinkler, including closed sprinkler (2), trigger lever mechanism (3), turnover mechanism (4) and gyro wheel line track (5), the closed sprinkler (2) is set on turnover mechanism (4), the turnover mechanism (4) is set on gyro wheel line track (5), trigger lever mechanism (3) is movably set on gyro wheel line track (5) top, and forms lever structure, one end of trigger lever mechanism (3) is connected with the limit position of turnover mechanism (4), and the other end is located in the upper of closed sprinkler (2). The gyro wheel line track (5) is provided with a tension spring (6), one end of the tension spring (6) is fixed on the gyro wheel line track (5), and the other end is connected with the turnover mechanism (4). The turnover mechanism (4) includes a stator (4.1) and a rotor (4.2), the stator (4.1) and the rotor (4.2) are coaxially connected, the stator (4.1) is composed of a center hole circular steel plate and a track hole plate A (4.1.1); the rotor (4.2) is composed of two circular steel plates, the two steel plates are fixed by a coaxial metal shaft, and the metal shaft passes through the center hole of the stator (4.1); the assembled stator (4.1) and rotor (4.2) can rotate around the metal shaft; the outer sides of the two circular steel plates of the rotor (4.2) are respectively connected with a track hole plate B (4.2.1) and a sprinkler clamping groove (4.2.2). The gyro wheel line track (5) is composed of two tracks, the two tracks are in the same plane, one of the two tracks is a straight track, and the other track is a turnover track, and the two ends of the turnover track are straight pipe sections, and the middle is a 180° gyro wheel line section. The track hole plate A (4.1.1) and the track hole plate B (4.2.1) of the turnover mechanism (4) are respectively sleeved with the two tracks of the gyro wheel line track (5), wherein the straight track is sleeved with the circular hole on the track hole plate A (4.1.1), and the turnover track is sleeved with the circular hole on the track hole plate B (4.2.1). The fulcrum part of the trigger lever mechanism (3) is fixed on the top of the gyro wheel line track (5), and one end of the long force arm of the trigger lever mechanism (3) is connected with a hard thin plate in the shape of a conical hat, and located above the sprinkler. One end of the short force arm of the trigger lever mechanism (3) is provided with a metal buckle, which can fix the stator (4.1) of the stretched turnover mechanism (4) on the top of the gyro wheel line track (5).

2. A closed automatic sprinkler head with a clothoid orbit flip mechanism according to claim 1, characterized in that, The utility model also includes a stainless steel flexible pipe (1), one end of the stainless steel flexible pipe (1) is connected with the closed sprinkler (2) and fixed on the turnover mechanism (4), and the other end is connected with a water supply pipeline of a sprinkler system.

3. A closed automatic sprinkler head with a clothoid orbit flip mechanism according to claim 1, wherein, The closed sprinkler (2) acts on the force on the top of the trigger lever mechanism (3) at the moment of starting to spray water, promotes the rotation of the trigger lever mechanism (3), makes the turnover mechanism (4) out of the limit state, moves downward along the gyro wheel line track (5), and the turnover mechanism (4) drives the closed sprinkler (2) to rotate 180° in the process of moving downward, the closed sprinkler (2) changes from upper spraying to lower spraying, and realizes the change of the position and direction of the closed sprinkler.

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