Spray head for low-temperature environment

Abstract

The utility model discloses a spray head for a low-temperature environment, which belongs to the technical field of fire fighting equipment and comprises a dry-type spray head body and a dry-type sealing pipe, an annular boss is integrally formed on the inner side of a top opening of the dry-type sealing pipe, and a sealing plate is adhered to the upper surface of the annular boss through sealant. A through hole is formed in the middle of the surface of the sealing plate, fusible metal is arranged on the inner side of the through hole, an internal thread provided with the inner wall of the dry type sealing pipe is arranged above the sealing plate, an external thread sleeve shell is connected to the internal thread in a threaded mode, and a connecting frame of a hollow structure is fixedly connected to the top of the external thread sleeve shell. According to the dry-type spray head, the fusible alloy can penetrate through the puncture pipe under the elastic acting force of the hard spring, so that fire fighting water in a fire fighting pipeline enters the dry-type spray head body to be sprayed within the shortest time, a fire can be extinguished in time, fire spreading is slowed down, and then loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, and more specifically to a sprinkler head for low-temperature environments. Background Art

[0002] When conventional fire sprinklers are used in a cold storage, if a fire occurs somewhere in the cold storage, the fire sprinklers near the fire source will burst. However, the threaded joints of other sprinklers that have not burst will also be filled with water during the flushing process of the pipes connecting the fire sprinklers. After the fire is extinguished, the threaded joints of the sprinklers will freeze due to the low temperature, which will affect the next fire extinguishing. Dry sprinklers are usually used in low temperature environments.

[0003] An existing patent is a dry-type fusible alloy sprinkler nozzle, and the patent authorization number CN219558576U includes a connecting pipe, one end of the connecting pipe is provided with a nozzle, the other end of the connecting pipe is provided with a tail ring, a tail needle and a top pipe are slidably installed in the connecting pipe along its axis, a tail pad is provided in the tail ring, one end of the tail needle abuts on the tail pad, and the other end of the tail needle is connected to the top pipe, and the top pipe abuts on the sprinkler head, the tail needle includes an integrally formed tube body and a support part, the tube body is connected to the top pipe, the support part abuts on the tail pad, and a notch with a triangular cross-section is provided on the support part. The notch with a triangular cross-section is provided on the tail needle, which can expand a larger flow range while ensuring strength; a streamlined contact surface is provided on the top pipe to reduce friction and make the water flow more uniform; the tail needle and the top pipe are connected by a locking tube to ensure integrated shedding, obtain a better fluid flow state, will not interfere with the flow, and obtain a more stable flow coefficient.

[0004] However, when the existing dry sprinkler is working, the fusible metal needs to be completely melted before the water in the pipe can be filled into the sprinkler to extinguish the fire, resulting in the inability to extinguish the fire in time, which not only causes the fire to spread but also increases losses. Therefore, we have proposed a sprinkler for low-temperature environments to solve the above problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In response to the problems existing in the prior art, the purpose of the present utility model is to provide a nozzle for low-temperature environments. Under the elastic force of a hard spring, the puncture tube can penetrate the fusible alloy, so that the fire water in the fire pipe can enter the dry nozzle body for spraying in the shortest time, which can extinguish the fire in time, slow down the spread of the fire, and thus reduce losses.

[0007] 2. Technical solution

[0008] In order to solve the above problems, the present invention adopts the following technical solutions.

[0009] A nozzle for low-temperature environments, comprising a dry nozzle body and a dry sealing tube, wherein an annular boss is integrally formed on the inner side of the top opening of the dry sealing tube;

[0010] A sealing plate is bonded to the upper surface of the annular boss by means of a sealant, a through hole is opened in the middle of the surface of the sealing plate, and a fusible metal is arranged inside the through hole;

[0011] An internal thread opening the inner wall of the dry sealing tube is provided above the sealing plate;

[0012] An externally threaded casing is screwed onto the internal thread, a connecting frame with a hollow structure is fixedly connected to the top of the externally threaded casing, a puncture tube with a bottom end abutting against the fusible alloy is movably connected to the bottom of the externally threaded casing, and a hard spring is installed between the top end of the puncture tube and the lower surface of the connecting frame.

[0013] Furthermore, the outer wall of the connecting frame is inlaid with a rubber ring;

[0014] The top opening of the dry sealing tube is provided with a groove in a stepped structure, and the inner side wall of the groove is tightly fitted with the rubber ring.

[0015] Furthermore, a flat groove is provided on the upper surface of the connecting frame.

[0016] Furthermore, a flange is provided at the top end of the puncture tube;

[0017] One end of the hard spring is connected to the flange, and the other end of the hard spring is connected to the lower surface of the connecting frame.

[0018] Furthermore, the bottom end of the puncture tube is configured in a conical structure.

[0019] Furthermore, a through hole is provided at the position where the bottom end of the externally threaded sleeve is combined with the puncture tube, and the inner diameter of the through hole is adapted to the outer diameter of the puncture tube.

[0020] Furthermore, the sealing plate is made of copper-aluminum alloy, and the melting point of the fusible alloy is ℃.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) In this solution, after a fire occurs, the glass tube at the bottom of the dry nozzle body bursts due to the high temperature. After the dry sealed tube is roasted by the high temperature, the heat is transferred from the sealing plate to the fusible alloy. The fusible alloy softens and gradually melts due to the heat. Under the elastic force of the hard spring, the puncture tube penetrates the fusible alloy, so that the fire water in the fire pipe enters the dry nozzle body for spraying in the shortest time, which can extinguish the fire in time, slow down the spread of the fire, and thus reduce the loss.

[0024] (2) In this solution, after the external threaded housing is screwed into place with the internal thread, the rubber ring provided on the outer wall of the connecting frame is tightly fitted with the inner wall of the groove provided on the top of the dry sealing tube, which can effectively prevent the connecting frame from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0026] Figure 2 This is a front view schematic diagram of a dry-type sealing tube of the present utility model;

[0027] Figure 3 This is a schematic cross-sectional view of the AA portion of the dry-type sealing tube of the present invention;

[0028] Figure 4 This is a schematic diagram of the sealing plate structure of the present utility model;

[0029] Figure 5 This is a schematic diagram of the connecting frame structure of the present invention.

[0030] Description of the numbers in the figure:

[0031] 1. Dry nozzle body; 2. Dry sealing tube; 3. Annular boss; 4. Sealing plate; 5. Fusible alloy; 6. Internal thread; 7. External thread casing; 8. Connecting frame; 9. Puncture tube; 10. Hard spring; 11. Flat groove; 12. Rubber ring. DETAILED DESCRIPTION

[0032] 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; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Example:

[0034] See also Figure 1-5A nozzle for low temperature environment, comprising a dry nozzle body 1 and a dry sealing tube 2, wherein an annular boss 3 is integrally formed on the inner side of the top opening of the dry sealing tube 2;

[0035] The upper surface of the annular boss 3 is bonded with a sealing plate 4 by a sealant. A through hole is opened in the middle of the surface of the sealing plate 4, and a fusible metal 5 is provided inside the through hole.

[0036] An internal thread 6 is provided above the sealing plate 4 and is provided on the inner wall of the dry sealing tube 2;

[0037] An externally threaded casing 7 is screwed onto the internal thread 6. A connecting frame 8 having a hollow structure is fixedly connected to the top of the externally threaded casing 7. A puncture tube 9 is movably connected to the bottom of the externally threaded casing 7, the bottom end of which abuts against the fusible alloy 5. A hard spring 10 is installed between the top of the puncture tube 9 and the lower surface of the connecting frame 8.

[0038] It should be noted that the dry nozzle body 1 is installed on the fire-fighting pipe in the cold storage through the dry sealing tube 2. After a fire occurs, the glass tube at the bottom of the dry nozzle body 1 bursts due to the high temperature. After the dry sealing tube 2 is roasted at high temperature, the heat is transferred to the fusible alloy 5 by the sealing plate 4. The fusible alloy softens and gradually melts due to the heat. Under the elastic force of the hard spring 10, the puncture tube 9 penetrates the fusible alloy 5, so that the fire-fighting water in the fire-fighting pipe enters the dry nozzle body 1 in the shortest time for spraying to extinguish the fire. The dry nozzle body 1 away from the fire source will not be filled with water, and will not be affected by freezing during the next fire extinguishing. The fire can be extinguished in time, slowing down the spread of the fire and thus reducing losses.

[0039] like Figure 4 、 Figure 5 As shown, the outer wall of the connecting frame 8 is inlaid with a rubber ring 12;

[0040] The top opening of the dry sealing tube 2 is provided with a stepped groove, and the inner wall of the groove is tightly fitted with the rubber ring 12;

[0041] It should be noted that after the external threaded shell 7 is screwed into place with the internal thread 6, the rubber ring 12 set on the outer wall of the connecting frame 8 is tightly fitted with the inner wall of the groove set at the top of the dry sealing tube 2, which can effectively prevent the connecting frame 8 from loosening.

[0042] like Figure 5 As shown, a flat groove 11 is provided on the upper surface of the connecting frame 8;

[0043] It should be noted that after the external threaded casing 7 is placed inside the dry sealing tube 2 , a flat-blade screwdriver is used to abut against the flat-blade groove 11 to facilitate assembly of the external threaded casing 7 .

[0044] like Figure 3As shown, the top end of the puncture tube 9 is provided with a flange;

[0045] One end of the hard spring 10 is connected to the flange, and the other end of the hard spring 10 is connected to the lower surface of the connecting frame 8. The bottom end of the puncture tube 9 is arranged in a conical structure;

[0046] It should be noted that the elastic force of the hard spring 10 is used to increase the pressure at the contact portion between the bottom end of the conical structure of the puncture tube 9 and the fusible alloy 5, so that the puncture tube 9 can penetrate the sealing plate 4 to achieve rapid water flow.

[0047] like Figure 3 As shown, a through hole is provided at the portion where the bottom end of the external threaded casing 7 is combined with the puncture tube 9, and the inner diameter of the through hole is adapted to the outer diameter of the puncture tube 9;

[0048] It should be noted that it plays a stable guiding role for the puncture tube 9.

[0049] The sealing plate 4 is made of copper-aluminum alloy, and the melting point of the fusible alloy is 80°C.

[0050] During use: the dry-type sprinkler main body 1 is installed on the fire-fighting pipe in the cold storage through the dry-type sealing tube 2. After a fire occurs, the glass tube at the bottom of the dry-type sprinkler main body 1 bursts due to the high temperature. After the dry-type sealing tube 2 is roasted at high temperature, the heat is transferred to the fusible alloy 5 by the sealing plate 4. The fusible alloy softens and gradually melts due to the heat. Under the elastic force of the hard spring 10, the puncture tube 9 penetrates the fusible alloy 5, so that the fire-fighting water in the fire-fighting pipe enters the dry-type sprinkler main body 1 in the shortest time for spraying to extinguish the fire. The dry-type sprinkler main body 1 away from the fire source will not be filled with water and will not be affected by freezing during the next fire extinguishing.

[0051] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A nozzle for low temperature environment, comprising a dry nozzle body (1) and a dry sealing tube (2), characterized in that: An annular boss (3) is integrally formed on the inner side of the top opening of the dry sealing tube (2); A sealing plate (4) is bonded to the upper surface of the annular boss (3) via a sealant, a through hole is provided in the middle of the surface of the sealing plate (4), and a fusible alloy (5) is provided inside the through hole; An internal thread (6) opening the inner wall of the dry sealing tube (2) is provided above the sealing plate (4); An external threaded casing (7) is screwed onto the internal thread (6), a connecting frame (8) having a hollow structure is fixedly connected to the top of the external threaded casing (7), a puncture tube (9) whose bottom end abuts against the fusible alloy (5) is movably connected to the bottom of the external threaded casing (7), and a hard spring (10) is installed between the top of the puncture tube (9) and the lower surface of the connecting frame (8).

2. A nozzle for low temperature environment according to claim 1, characterized in that: The outer wall of the connecting frame (8) is inlaid with a rubber ring (12); The top opening of the dry sealing tube (2) is provided with a groove in a stepped structure, and the inner side wall of the groove is tightly fitted with the rubber ring (12).

3. The nozzle for low temperature environment according to claim 1, characterized in that: A flat groove (11) is provided on the upper surface of the connecting frame (8).

4. The nozzle for low temperature environment according to claim 1, characterized in that: The top end of the puncture tube (9) is provided with a flange; One end of the hard spring (10) is connected to the flange, and the other end of the hard spring (10) is connected to the lower surface of the connecting frame (8).

5. The nozzle for low temperature environment according to claim 1, characterized in that: The bottom end of the puncture tube (9) is arranged in a conical structure.

6. The nozzle for low temperature environment according to claim 1, characterized in that: A through hole is provided at the portion where the bottom end of the externally threaded casing (7) is connected to the puncture tube (9), and the inner diameter of the through hole is adapted to the outer diameter of the puncture tube (9).

7. The nozzle for low temperature environment according to claim 1, characterized in that: The sealing plate (4) is made of copper-aluminum alloy, and the melting point of the fusible alloy is 80°C.

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