Adjustable fire sprinkler

Abstract

The utility model relates to the technical field of fire-fighting sprayers, in particular to an adjustable fire-fighting sprayer, which comprises a frame, and a sealing element, an actuating mechanism, a splash box and a thermosensitive element which are arranged on the frame, and further comprises an adjusting mechanism consisting of a supporting part and an adjusting part, the adjusting mechanism is arranged between the sealing element and the action mechanism, the supporting part is connected with the sealing element, and the adjusting part is connected with the action mechanism; the supporting part is movably connected with the adjusting part so as to enlarge or reduce the distance between the sealing element and the action mechanism, the sealing requirement of the spray head can be met, and the manufacturing cost of the spray head can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fire sprinklers, and specifically to an adjustable fire sprinkler. Background Art

[0002] The fusible alloy sprinkler is a kind of sprinkler with a fusible alloy as the heat-sensitive element, which is widely used in light and medium hazard levels such as hotels, commercial buildings, restaurants, storage warehouses, underground garages, and garment factories, and can also be used to protect places with a severe hazard level. It is especially suitable for low-temperature environments and places where the sprinkler is not allowed to explode.

[0003] Existing fusible alloy sprinklers, such as an early suppression fast response sprinkler in a Chinese patent with the publication number CN104096333B, mainly consist of parts such as a mounting seat, a deflector, a sprinkler head, a sealing ring, a ball seat, a fusible link, a support rod, and a lever. Among them, the ball seat and the sealing ring are arranged inside the sprinkler head through a triangular support structure composed of a fusible link, a support rod, and a lever to meet the sealing of the sprinkler head under a set static water pressure (generally 3.4 MPa). In order to achieve stable cooperation among the fusible link, the support rod, and the lever, the precision of each part of the sprinkler head needs to reach a predetermined requirement during production and processing. However, the high precision requirement will not only increase the production difficulty but also increase the production and manufacturing cost. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an adjustable fire sprinkler, which can not only meet the sealing requirements of the sprinkler but also reduce the manufacturing cost of the sprinkler.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an adjustable fire sprinkler, including a frame and a sealing element, an actuating mechanism, a deflector, and a heat-sensitive element installed on the frame. The sprinkler head further includes an adjusting mechanism composed of a supporting part and an adjusting part; the adjusting mechanism is arranged between the sealing element and the actuating mechanism. Among them, the supporting part is connected to the sealing element, and the adjusting part is connected to the actuating mechanism; the supporting part and the adjusting part are movably connected to increase or decrease the distance between the sealing element and the actuating mechanism.

[0006] Preferably, the supporting part includes a screw rod; the adjusting part includes an adjusting seat; the adjusting seat is sleeved on the screw rod and is threadedly connected to the screw rod; the upper part of the screw rod is connected to the sealing element; the lower end of the adjusting seat is press-connected to the actuating mechanism.

[0007] Preferably, the supporting part further includes a ball; a positioning hole is opened at the lower part of the sealing element; the ball is arranged in the positioning hole through the screw rod.

[0008] Preferably, the actuating mechanism includes a left support rod and a right support rod; the lower ends of the left support rod and the right support rod are connected by a thermal element, the upper ends of the left support rod and the right support rod are both crimped to the adjusting seat, and the rod bodies of the left support rod and the right support rod are both in contact with the frame.

[0009] Preferably, a groove adapted to the left support rod and the right support rod is formed at the lower end of the adjusting seat.

[0010] Preferably, it further includes a spring; the spring is arranged on the frame; the adjusting mechanism further includes a nut; the nut is arranged on the screw rod and on the lower side of the adjusting seat; the screw rod is crimped to the spring through the nut.

[0011] Preferably, the sealing element includes a ball seat and a seal; the seal is crimped to the frame through the ball seat; the ball seat is movably connected to the screw rod.

[0012] Preferably, the seal includes an O-ring structure.

[0013] Preferably, the seal includes an elastic sealing gasket; the elastic sealing gasket is in an annular conical structure.

[0014] Preferably, the O-ring is made of polytetrafluoroethylene.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging an adjusting mechanism between the sealing element and the left support rod and the right support rod, the adjusting mechanism includes an adjusting seat and a screw rod, the screw rod is rotatably connected to the sealing element, the adjusting seat is threadedly connected to the screw rod, and the adjusting seat is crimped to the left support rod and the right support rod. By adjusting the distance between the adjusting seat and the sealing element, the lengths of the left support rod and the right support rod can be compensated, which can not only make up for the deficiency in the precision of the left support rod and the right support rod, but also meet the sealing requirements of the nozzle. Description of the Drawings

[0016] Figure 1 is a schematic longitudinal sectional view of the nozzle of the present utility model;

[0017] Figure 2 is a schematic overall structure view of the nozzle of the present utility model;

[0018] Figure 3 is of the present utility model Figure 1 schematic view at A in;

[0019] Figure 4 is a schematic structure view of the frame of the present utility model;

[0020] Figure 5 is a schematic view of the cooperation between the sealing element and the adjusting mechanism in the second embodiment of the present utility model.

[0021] In the figure: 1 frame, 2 sealing element, 3 adjusting mechanism, 4 left support rod, 5 right support rod, 6 splash plate, 7 thermal element, 8 spring, 11 pipe joint, 12 bracket, 13 fixing seat, 14 through hole, 21 ball seat, 22 sealing ring, 23 elastic sealing gasket, 211 positioning hole, 31 adjusting seat, 32 screw rod, 33 ball, 34 nut. Specific embodiments

[0022] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and do not limit the scope of the present invention.

[0023] Specific embodiment 1: Please refer to Figures 1-4 An adjustable fire sprinkler head, comprising: a frame 1, a sealing element 2, an adjusting mechanism 3, a left support rod 4, a right support rod 5, a splash plate 6, a thermal element 7 and a spring 8. The frame 1 includes a pipe joint 11, a bracket 12 and a fixing seat 13 arranged in sequence from top to bottom. A positioning boss is provided at the joint of the pipe joint 11 and the bracket 12. The sealing element 2 is installed on the positioning boss with the cooperation of the adjusting mechanism 3, the left support rod 4, the right support rod 5 and the thermal element 7 to block the pipe joint 11. Among them, the adjusting mechanism 3 is located between the sealing element 2 and the left support rod 4 and the right support rod 5. The spring 8 is installed on the bracket 12 and is pressed against the adjusting mechanism 3. The splash plate 6 is arranged at the lower end of the fixing seat 13, and the thermal element 7 is located below the splash plate 6. During use, this sprinkler head is installed in a pendant manner on the municipal pipeline, and the thermal element 7 is located at the lowest end. After a fire occurs, the thermal element 7 can receive the hot air flow in the first time to achieve the effect of ultra-early suppression and rapid response.

[0024] Specifically, the sealing element 2 is composed of a ball seat 21 made of rigid material and an O-shaped sealing ring 22 made of polytetrafluoroethylene. The ball seat 21 is installed on the positioning boss, and the sealing ring 22 is arranged between the ball seat 21 and the positioning boss. After assembly, the rigid ball seat 21 transmits the pre-tightening force to the sealing ring 22. At this time, the sealing ring 22 is squeezed and deformed under the action of the supporting reaction force of the upper positioning boss and the pre-tightening force transmitted from the lower side, and the sealing ring 22 forms a surface contact with the positioning boss to achieve the purpose of sealing. A positioning hole 211 is also opened at the lower part of the center of the ball seat 21.

[0025] The adjusting mechanism 3 includes an adjusting seat 31, a screw 32, a ball 33 and a nut 34. The ball 33 is arranged in the positioning hole 211 through the screw 32. At least a part of the upper part of the screw 32 is arranged in the positioning hole 211 and the screw 32 is loosely fitted with the ball seat 21. Both the adjusting seat 31 and the nut 34 are sleeved on the screw 32 and are threadedly connected to the screw 32. The nut 34 is located below the adjusting seat 31. After assembly, the spring 8 can be compressed by rotating the nut 34. Further, an internal hexagonal hole is provided at the lower part of the screw 32 to facilitate the rotation of the screw 32.

[0026] Both the left support rod 4 and the right support rod 5 are arc-shaped structures bent outward. Their structures are the same, and the left support rod 4 and the right support rod 5 are symmetrically installed on the frame 1. A through hole 14 is provided on the bracket 12. The left support rod 4 and the right support rod 5 are arranged on the frame 1 by passing through the through holes 14 at corresponding positions. The lower end of the left support rod 4 and the lower end of the right support rod 5 are connected by a thermal element 7 to form a tension. At the same time, the upper ends of the left support rod 4 and the right support rod 5 are both pressed against the lower end of the adjusting seat 31 under the action of a lever. That is to say, the left support rod 4 and the right support rod 5 can transfer the designed load to the adjusting seat 31 through the lever action of the left support rod 4 and the right support rod 5 and the thermal element 7 that meets the specific action temperature. Further, the adjusting seat 31 transfers the load to the ball seat 21 through the screw 32 and the ball 33 and compresses the sealing ring 22 so that the sealing ring 22 is in surface contact with the frame 1. Through such a setting, the sealing of the nozzle under a static water pressure of 3.4 MPa can be realized.

[0027] During assembly, by rotating the screw 32, the adjusting seat 31 can be displaced up and down relative to the ball seat 21. By adjusting the distance between the adjusting seat 31 and the ball seat 21, not only can the deficiency in the accuracy of the left support rod 4 and the right support rod 5 be solved, but also the sealing requirements of the nozzle can be met.

[0028] In one embodiment, in order to increase the contact area between the adjusting seat 31 and the left support rod 4 and the right support rod 5 and improve the stability of the nozzle structure, grooves adapted to the left support rod 4 and the right support rod 5 are provided on the adjusting seat 31, and the side walls of the grooves are in surface contact with the left support rod 4 and the right support rod 5.

[0029] In one embodiment, as an implementation part of the lever action, the structure of the left support rod 4 is not limited to an arc-shaped structure bent outward, and can also be an arc-shaped structure bent inward to the frame 1 or a straight rod structure.

[0030] Through this technical solution, an adjustment mechanism is provided between the sealing element and the left support rod and the right support rod. The adjustment mechanism includes an adjustment seat and a screw rod. The screw rod is rotatably connected to the sealing element, the adjustment seat is threadedly connected to the screw rod, and the adjustment seat is press-fitted with the left support rod and the right support rod. By adjusting the distance between the adjustment seat and the sealing element, the lengths of the left support rod and the right support rod can be compensated. This can not only make up for the lack of accuracy of the left support rod and the right support rod, but also meet the sealing requirements of the sprinkler head.

[0031] Specific Embodiment 2: In order to further improve the sensitivity of this sprinkler head, different from Embodiment 1, the sealing element 2 is composed of a ball seat 21 made of a rigid material and an elastic sealing gasket 23. The ball seat 21 is installed on the positioning boss, and the elastic sealing gasket 23 is arranged between the ball seat 21 and the positioning boss; in this embodiment, the elastic sealing gasket 23 is in an annular conical structure, and its longitudinal section is similar to a trapezoid; during implementation, the main body of the elastic sealing gasket 23 is formed by spring steel and is plated with a soft film on the outside. The elastic sealing gasket 23 is rigid on the inside and flexible on the outside, which can not only play a supporting role but also deform to a certain extent to play a sealing role; after assembly, the elastic sealing gasket 23 is pressed by the ball seat 21 on the positioning boss. When a fire occurs, the thermal element 7 acts first, and the lever action of the left support rod 4 and the right support rod 5 disappears. The adjustment mechanism 3 and the ball seat 21 lose support, and the elastic potential energy of the spring 8 and the elastic sealing gasket 23 is released, causing the adjustment mechanism 3 and the sealing element 2 to quickly disengage from the positioning boss. The water in the municipal pipeline is sprayed through the pipe joint 11 onto the splash plate 6 to form an atomization area. In this way, the response time of the sprinkler head can be further reduced to improve its sensitivity. Using this sprinkler head can effectively control the fire, reduce the temperature, and block the diffusion of smoke and harmful gases.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable fire sprinkler, comprising a frame (1) and a sealing element (2), an actuating mechanism, a splash plate (6) and a thermal element (7) mounted on the frame (1), characterized in that: The nozzle further comprises an adjusting mechanism (3) composed of a supporting portion and an adjusting portion; the adjusting mechanism (3) is arranged between the sealing element (2) and the actuating mechanism, wherein the supporting portion is connected to the sealing element (2) and the adjusting portion is connected to the actuating mechanism; the supporting portion and the adjusting portion are movably connected to expand or reduce the distance between the sealing element (2) and the actuating mechanism.

2. The adjustable fire sprinkler according to claim 1, characterized in that: The support portion comprises a screw rod (32); the adjustment portion comprises an adjustment seat (31); the adjustment seat (31) is sleeved on the screw rod (32) and threadedly connected to the screw rod (32); the upper portion of the screw rod (32) is connected to the sealing element (2); and the lower end of the adjustment seat (31) is crimped to the action mechanism.

3. The adjustable fire sprinkler according to claim 2, characterized in that: The support portion further comprises a ball (33); a positioning hole is provided at the lower portion of the sealing element (2); and the ball (33) is arranged in the positioning hole via a screw rod (32).

4. The adjustable fire sprinkler according to claim 2, characterized in that: The action mechanism comprises a left support rod (4) and a right support rod (5); the lower end of the left support rod (4) and the lower end of the right support rod (5) are connected via a thermal element (7); the upper ends of the left support rod (4) and the right support rod (5) are both press-fitted to the adjustment seat (31); and the rod bodies of the left support rod (4) and the right support rod (5) are both in contact with the frame (1).

5. The adjustable fire sprinkler according to claim 4, characterized in that: The lower end of the adjustment seat (31) is provided with a groove adapted to fit the left support rod (4) and the right support rod (5).

6. The adjustable fire sprinkler according to claim 2, characterized in that: It also includes a spring (8); the spring (8) is arranged on the frame (1); the adjustment mechanism (3) also includes a nut; the nut is arranged on the screw rod (32) and on the lower side of the adjustment seat (31); the screw rod (32) is crimped with the spring (8) via the nut.

7. The adjustable fire sprinkler according to claim 2, characterized in that: The sealing element (2) comprises a ball seat (21) and a sealing member; the sealing member is crimped to the frame (1) via the ball seat (21); and the ball seat (21) is movably connected to the screw rod (32).

8. The adjustable fire sprinkler according to claim 7, characterized in that: The sealing component comprises a sealing ring (22) of an O-shaped structure.

9. The adjustable fire sprinkler according to claim 7, characterized in that: The sealing element comprises an elastic sealing gasket (23); the elastic sealing gasket (23) is an annular conical structure.

10. The adjustable fire sprinkler according to claim 8, characterized in that: The sealing ring (22) is made of polytetrafluoroethylene.

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