Dry-type sprinkler head

Abstract

The utility model relates to the technical field of sprinkler heads, in particular to a dry type sprinkler head which comprises a sprinkler head body composed of a frame and an external connection pipe, a sealing assembly, a glass ball, a ball seat, a splash box and a positioning screw, a channel is arranged on the inner side of the sprinkler head body, and the splash box is fixedly arranged on the frame through the positioning screw and corresponds to the head end of the channel. The sealing assembly is arranged on the external connecting pipe to seal the rear end of the channel, the spray head further comprises a supporting assembly, and the supporting assembly comprises a supporting rod and a support; the glass ball is arranged on the inner side of the yoke arm frame through a ball seat and a supporting assembly, the ball seat is arranged at the head end opening of the channel in a closed mode, and a supporting rod is erected between the ball seat and the sealing assembly through a support and abuts against the ball seat and the sealing assembly; the stability of the internal structure of the sprinkler head and the working performance of the sprinkler head can be improved, and normal operation of a fire extinguishing system is guaranteed.

Description

Technical Field

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

[0002] Dry sprinkler heads are mainly used in cold storage, electronics factories, precision instrument warehouses, underground garages in cold regions, and places that require seasonal venting. Compared with ordinary sprinkler heads, the main feature of dry sprinkler heads is that the temperature sensing component of the sprinkler head can be used in environments below 0℃, which solves the problem that ordinary sprinkler heads must be used in environments above 4℃ in wet systems.

[0003] In the prior art, for example, the dry sprinkler head with announcement number CN203829528U is assembled from parts such as a top sleeve, inner jacking pipe, outer pipe, rotating plug, cotter pin, sealing seat ring, sealing gasket, washer, ball seat sleeve, glass column, and yoke arm. This sprinkler head supports the glass column by setting an inner jacking pipe and a top sleeve inside the outer pipe. When the glass column is exposed to fire and breaks, water is sprayed from the inner jacking pipe and the top sleeve onto the splash plate. For long dry sprinkler heads, since the inner jacking pipe is supported by the top sleeve at only one end, the inner jacking pipe is prone to vibration when the water flow velocity is high, which will disturb the water flow and reduce the spraying effect of the sprinkler head. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a dry sprinkler head that improves the stability of the internal structure and the working performance of the sprinkler head, ensuring the normal operation of the fire extinguishing system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dry sprinkler head, comprising a sprinkler body consisting of a frame and an outer connecting pipe, a sealing assembly, a glass bulb, a bulb seat, a splash plate, and positioning screws. The inner side of the sprinkler body has a channel. The splash plate is fixed to the frame by positioning screws and corresponds to the first end of the channel. The sealing assembly is located on the outer connecting pipe to close the rear end of the channel. The sprinkler head also includes a support assembly, which includes a support rod and a bracket. The glass bulb is located inside the yoke arm via the bulb seat and the support assembly. The bulb seat is closed at the first end of the channel. The support rod is supported between the bulb seat and the sealing assembly via the bracket, and the support rod abuts against both the bulb seat and the sealing assembly.

[0006] Preferably, the bracket has at least two components; the bracket consists of a limiting ring and multiple support plates fixed on the outer periphery of the limiting ring, the limiting ring is disposed in the channel through the support plates, and the limiting ring is coaxial with the channel; the multiple limiting rings are all sleeved on the support rod and the support rod and the limiting ring are loosely fitted.

[0007] Preferably, a limiting plate is provided in the middle of the support rod; multiple brackets are distributed on both sides of the limiting plate; the inner diameter of the limiting ring is smaller than the outer diameter of the limiting plate.

[0008] Preferably, the support rod includes a connecting rod and a supporting rod; the tail end of the connecting rod is slidably connected to the head end of the supporting rod; the limiting plate is located in the middle of the connecting rod; the head end of the connecting rod abuts against the ball seat; and the tail end of the supporting rod abuts against the sealing assembly.

[0009] Preferably, a connecting hole is provided at the center of the first end of the support rod; the tail end of the connecting rod extends at least partially into the connecting hole.

[0010] Preferably, the support assembly further includes a spring washer and a flat washer; the spring washer is compressed between the limiting plate and the support rod by the flat washer.

[0011] Preferably, the bracket located between the limiting plate and the sealing assembly is in tight fit with the inner wall of the channel.

[0012] Preferably, the sealing assembly includes a sealing seat ring, a sealing base, and a sealing ring. The sealing seat ring is a tubular structure and is located at the tail end of the outer tube. The sealing base is held in place at the outer port of the sealing seat ring by a support rod and a sealing ring.

[0013] Preferably, the sealing ring is connected to the outer pipe via a thread.

[0014] Preferably, a decorative cover is also fixedly fitted around the outer periphery of the first end of the outer tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting connecting rods and support rods supported by the first bracket and the second bracket on the inner side of the frame and the outer pipe, the connecting rods and support rods that support the glass ball, the ball seat and the sealing assembly maintain axiality, thereby improving the stability of the internal structure of the sprinkler head and the working performance of the sprinkler head, and ensuring the normal operation of the fire extinguishing system. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of the sprinkler head of this utility model;

[0017] Figure 2 This is a schematic diagram of the connecting rod structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the first support structure of this utility model;

[0019] Figure 4 For the present utility model Figure 1 Schematic diagram of the structure at point A;

[0020] Figure 5This is a schematic diagram of the second support structure of this utility model.

[0021] In the diagram: 1. Frame, 2. Outer pipe, 3. Sealing assembly, 4. Glass ball, 5. Ball seat, 6. Connecting rod, 7. Support rod, 8. First bracket, 9. Second bracket, 10. Spring washer, 11. Flat washer, 12. Splash plate, 13. Positioning screw, 14. Decorative cover, 21. Connecting groove, 31. Sealing seat ring, 32. Sealing seat, 33. Sealing ring, 61. Limiting plate, 71. Connecting hole, 81. First limiting ring, 82. First support plate, 91. Second limiting ring, 92. Second support plate. Detailed Implementation

[0022] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.

[0023] See Figure 1-5 In one embodiment of this utility model, a dry sprinkler head includes: a sprinkler body composed of a frame 1 and an outer pipe 2, a sealing assembly 3, a glass bulb 4, a ball seat 5, a splash plate 12, a positioning screw 13, and a support assembly. The front end of the sprinkler body is a yoke arm frame composed of multiple yoke arms. The inner side of the sprinkler body is provided with a channel that communicates with the space inside the yoke arm frame. The splash plate 12 is fixed to the yoke arm frame by the positioning screw 13. The sealing assembly 3 is located at the rear end of the sprinkler body to close the rear end of the channel. The glass bulb 4 is connected to the ball seat 5. The support assembly is located inside the yoke arm. The ball seat 5 is located at the first end of the channel to close the front end of the channel. The first end of the support assembly abuts against the tail end of the ball seat 5, and the tail end of the support assembly abuts against the sealing assembly 3. With the above configuration, this sprinkler head has high reliability and wide application range. It is mainly used in dry or pre-action systems, as well as in situations where the sprinkler head or part of the sprinkler head connection needs to be exposed to a freezing environment, or in places where seasonal shutdown is required to drain and prevent freezing of the sprinkler system network. This sprinkler head can also be used in places in wet sprinkler systems that are susceptible to freezing.

[0024] In one embodiment, the frame 1 is an integral structure composed of a nozzle body and multiple yoke arms. The splash plate 12 is fixed to the yoke arm of the frame 1 by positioning screws 13. The nozzle body forms the tail end of the frame 1. The nozzle body has a water outlet hole inside. The head end of the outer pipe 2 is connected to the nozzle body by a thread and communicates with it. The ball seat 5 is located inside the water outlet hole to close the water outlet hole. In a specific implementation, a connecting groove 21 is opened on the inner side of the head end of the outer pipe 2. An internal thread is opened on the side wall of the connecting groove 21. An external thread matching the internal thread is opened on the outer side of the nozzle body.

[0025] The support assembly includes a connecting rod 6, a support rod 7, a first bracket 8, a second bracket 9, a spring washer 10, and a flat washer 11. The connecting rod 6 and the support rod 7 are connected to form a support rod as a load-bearing structure. The first end of the connecting rod 6 abuts against the tail end of the ball seat 5, while the tail end of the support rod 7 abuts against the sealing assembly 3. A limiting plate 61 is also provided in the middle of the body of the connecting rod 6. A connecting hole 71 is opened in the center of the first end of the support rod 7. At least part of the tail end of the connecting rod 6 is slidably inserted into the connecting hole 71. The spring washer 10 is pressed between the limiting plate 61 and the support rod 7 by the flat washer 11. The elastic potential energy of the spring washer 10 is accumulated. The advantage is that it can prevent the design load from being reduced or the elasticity of the sealing element from being reduced due to thermal expansion and contraction, thereby improving the reliability and creep resistance of the nozzle.

[0026] The support rod, consisting of the connecting rod 6 and the support rod 7, is erected in the channel via the first bracket 8 and the second bracket 9, achieving axial alignment between the support rod and the nozzle body. Specifically, the first bracket 8 includes a first limiting ring 81 and three first support plates 82, which are arranged around the axis of the limiting ring 81 on the outer periphery of the limiting ring 81. (See reference...) Figure 1 and Figure 4 After assembly, the first bracket 8 is pressed between the frame 1 and the outer pipe 2, and the outer diameter of the first bracket 8 is adapted to the inner diameter of the connecting groove 21; the second bracket 9 consists of a second limiting ring 91 and three second support plates 92, and the second bracket 9 is located between the connecting rod 6 and the sealing assembly 3. In implementation, the second bracket 9 and the outer pipe 2 are tightly fitted; the rod body of the connecting rod 6 passes through the first limiting ring 81 and is loosely fitted with the first limiting ring 81; the support rod 7 passes through the second limiting ring 91 and is loosely fitted with the second limiting ring 91; the inner diameter of the first limiting ring 81 is smaller than the outer diameter of the limiting plate 61. Thus, under the limiting of the first bracket 8 and the second bracket 9, the connecting rod 6 and the support rod 7 are always located at the axis when the nozzle sprays water, and the water flow is in the channel and rushes towards the splash plate through the gap between the support plates. The connecting rod 6 and the support rod 7 will not block the channel; the first limiting ring 81 and the second limiting ring 91 are coaxial with the channel.

[0027] As described above, the first bracket 8 not only serves as a support but also prevents the connecting rod 6 from being pushed out, thus avoiding blockage. The second bracket 9 also serves as a support, and its number is not limited to one mentioned above. When the length of the outer pipe 2 needs to be increased, the number of second brackets 9 can be increased as appropriate. Increasing the length of the outer pipe 2 will inevitably improve the applicability of this nozzle.

[0028] The sealing assembly 3 includes a sealing seat 31, a sealing seat 32, and a sealing ring 33. The sealing seat 31 is a tubular structure and is threaded onto the tail end of the outer pipe 2. The sealing seat 32 is pressed against the tail end of the sealing seat 31 by the support rod 7 and the sealing ring 33 to seal the sealing seat 31.

[0029] In the event of a fire, the glass ball 4 breaks, the ball seat 5 loses its support and detaches from the frame 1, the connecting rod 6 and the support rod 7 lose their support, which in turn causes the sealing seat 32 to lose its support, the sealing seat ring 31 opens, and water flows in through the external pipe 2 to spray onto the splash plate to extinguish the fire.

[0030] In one embodiment, a decorative cover 14 is also fixedly fitted around the outer periphery of the head end of the outer tube 2.

[0031] This technical solution improves the stability of the sprinkler head's internal structure and its working performance by installing connecting rods and support rods supported by the first and second brackets on the inner side of the frame and outer pipe. This is achieved by maintaining the axiality of the connecting rods and support rods that support the glass ball, ball seat, and sealing assembly.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dry sprinkler head, comprising a sprinkler body consisting of a frame (1) and an outer pipe (2), a sealing assembly (3), a glass bulb (4), a bulb seat (5), a splash plate (12), and a positioning screw (13), wherein the inner side of the sprinkler body is provided with a channel, the splash plate (12) is fixedly mounted on the frame (1) by the positioning screw (13) and corresponds to the first end of the channel, and the sealing assembly (3) is provided on the outer pipe (2) to close the rear end of the channel, characterized in that: The nozzle also includes a support assembly, which includes a support rod and a bracket; the glass ball (4) is located on the inner side of the yoke arm frame through the ball seat (5) and the support assembly, wherein the ball seat (5) is closedly located at the first port of the channel, and the support rod is mounted between the ball seat (5) and the sealing assembly (3) through the bracket and the support rod abuts against both the ball seat (5) and the sealing assembly (3).

2. A dry sprinkler head according to claim 1, characterized in that: The bracket is provided in at least two parts; the bracket is composed of a limiting ring and multiple support plates fixed on the outer periphery of the limiting ring, the limiting ring is provided in the channel through the support plates, and the limiting ring is coaxial with the channel; the multiple limiting rings are all sleeved on the support rod and the support rod and the limiting ring are loosely fitted.

3. A dry sprinkler head according to claim 2, characterized in that: The support rod is provided with a limiting plate (61) in the middle; multiple brackets are distributed on both sides of the limiting plate (61); the inner diameter of the limiting ring is smaller than the outer diameter of the limiting plate (61).

4. A dry sprinkler head according to claim 3, characterized in that: The support rod includes a connecting rod (6) and a support rod (7); the tail end of the connecting rod (6) is slidably connected to the head end of the support rod (7); the limiting plate (61) is located in the middle of the connecting rod (6); the head end of the connecting rod (6) abuts against the ball seat (5); the tail end of the support rod (7) abuts against the sealing assembly (3).

5. A dry sprinkler head according to claim 4, characterized in that: A connecting hole is provided at the center of the first end of the support rod (7); at least part of the tail end of the connecting rod (6) extends into the connecting hole.

6. A dry sprinkler head according to claim 4, characterized in that: The support assembly also includes a spring washer (10) and a flat washer (11); the spring washer (10) is compressed between the limiting plate (61) and the support rod (7) by the flat washer (11).

7. A dry sprinkler head according to claim 3, characterized in that: The bracket located between the limiting plate (61) and the sealing assembly (3) is tightly fitted to the inner wall of the channel.

8. A dry sprinkler head according to claim 4, characterized in that: The sealing assembly (3) includes a sealing seat, a sealing seat and a sealing ring. The sealing seat is a tubular structure and is located at the tail end of the outer pipe (2). The sealing seat is held in place at the outer port of the sealing seat by a support rod (7) and a sealing ring.

9. A dry sprinkler head according to claim 8, characterized in that: The sealing ring and the outer pipe (2) are connected by threads.

10. A dry sprinkler head according to claim 1, characterized in that: A decorative cover (14) is also fixedly fitted around the outer periphery of the first end of the outer pipe (2).

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