A temperature and smoke fire detector convenient to disassemble

Abstract

The utility model relates to fire detector technical field especially convenient to dismount's temperature sensing smoke type fire detector, including fire detector, inner ring shell and a plurality of fastener, the fire detector peripheral wall is fixedly connected with inner ring shell, the peripheral wall of inner ring shell is opened with annular groove, the inner wall bottom of annular groove is opened with sheltered groove, the sliding sleeve of outer ring shell is equipped with the peripheral wall of inner ring shell, the inner wall of outer ring shell is opened with connecting groove, the peripheral wall of inner ring shell is equipped with first flange. Through the setting of inner ring shell, outer ring shell, annular groove and sheltered groove, after installation, the fire detector is loosened, under the tension of spring, the inner ring shell moves upward, the hexagonal head on fastener is stored to sheltered groove, avoids fastener to expose outside, the whole detector presents simple annular appearance, and the closed space formed simultaneously isolates air, dust and corrosive gas, avoids fastener and environment direct contact, reduces the risk of rust.

Description

Technical Field

[0001] This utility model relates to the field of fire detector technology, and more specifically, to a heat and smoke-sensing fire detector that is easy to assemble and disassemble. Background Technology

[0002] Heat and smoke detectors are multi-element composite detectors composed of smoke sensors and semiconductor temperature sensors. They are key equipment for early fire monitoring in building fire protection systems. Their installation stability and durability directly affect the fire warning effect. The detectors are usually fixed with bolts.

[0003] When installing existing heat and smoke detectors, holes are usually drilled in the ceiling for a more aesthetically pleasing installation. The hexagonal heads at the bottom of some detector fasteners are often exposed. However, exposed fasteners can ruin the overall clean look of the detector. In public places where decoration style is important, they can easily clash with the surrounding environment and affect the visual effect of the space. Secondly, they have weak corrosion resistance. When fasteners are exposed to the air for a long time, they are susceptible to corrosion due to environmental factors such as humidity, dust, and corrosive gases. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a heat and smoke sensing fire detector that is easy to disassemble and assemble, solving the technical problem of exposed fasteners damaging the visual effect. At the same time, the enclosed space formed isolates air, dust and corrosive gases, avoids direct contact between fasteners and the environment, and reduces the risk of corrosion.

[0005] The technical solution of this utility model is as follows: a heat and smoke sensing fire detector that is easy to assemble and disassemble, comprising a fire detector, an inner ring shell, and multiple fasteners. The outer peripheral wall of the fire detector is fixedly connected to the inner ring shell. An annular groove is formed on the outer peripheral wall of the inner ring shell. A shielding groove is formed at the bottom of the inner wall of the annular groove. An outer ring shell is slidably fitted on the outer peripheral wall of the inner ring shell. A connecting groove is formed on the inner wall of the outer ring shell. A first flange is formed on the outer peripheral wall of the inner ring shell. A second flange is formed on the outer peripheral wall of the outer ring shell. The first flange is slidably connected to the inner wall of the connecting groove. The second flange is slidably connected to the annular groove. The fasteners pass through the second flange, the first flange, and the outer ring shell from bottom to top and extend to their outer side. The hexagonal head on the fastener is located inside the outer ring shell. A spring is fitted on the fastener. One end of the spring abuts against the inner ring shell, and the other end of the spring abuts against the outer ring shell.

[0006] Preferably, the fastener includes a screw and a hexagonal sleeve, the hexagonal sleeve is located in a shielding groove, the hexagonal sleeve is fitted onto the outer wall of the screw, the inner wall of the hexagonal sleeve has two mounting grooves, and the outer wall of the screw has a limiting hole.

[0007] Preferably, a rotating shaft is fixedly connected to the inner wall of the mounting groove, a locking block is rotatably connected to the outer circumference of the rotating shaft, a torsion spring is sleeved on the outer wall of the rotating shaft, the locking block engages with a limiting hole, one end of the torsion spring is fixedly connected to the locking block, and the other end of the torsion spring is fixedly connected to a hexagonal sleeve.

[0008] Preferably, the top of the inner ring shell is provided with a plurality of first mounting holes, and the end of the screw passes through the first mounting holes and extends to its outer side.

[0009] Preferably, the top of the outer ring shell is provided with a plurality of third mounting holes, the bottom of the outer ring shell is provided with a plurality of second mounting holes, and the end of the screw passes through the second mounting holes and the third mounting holes.

[0010] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0011] 1. In this utility model, by setting up an inner ring shell, an outer ring shell, an annular groove, and a shielding groove, after installation, when the fire detector is released, the inner ring shell moves upward under the pulling force of the spring, and the hexagonal head on the fastener is stored in the shielding groove, preventing the fastener from being exposed. The detector presents a simple annular appearance, which can be matched with various decoration styles, solving the technical problem of exposed fasteners destroying the visual effect. At the same time, the enclosed space formed isolates air, dust and corrosive gases, preventing the fastener from direct contact with the environment and reducing the risk of corrosion.

[0012] 2. In this utility model, the locking block and the limiting hole are engaged, and the torsion spring and the hexagonal sleeve are automatically locked to prevent the screw from loosening due to vibration during use, while also facilitating the assembly of the screw. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the installation structure of the fire detector of this utility model;

[0016] Figure 3 This is a schematic diagram of the installation structure of the inner ring shell of this utility model;

[0017] Figure 4 This is a schematic diagram of the inner ring shell of this utility model;

[0018] Figure 5 This is a schematic diagram of the outer ring shell of this utility model;

[0019] Figure 6 This is a schematic diagram of the installation structure of the hexagonal sleeve of this utility model.

[0020] In the diagram: 1. Fire detector; 2. Inner ring shell; 201. First flange; 3. Outer ring shell; 301. Second flange; 4. First mounting hole; 5. Annular groove; 6. Shielding groove; 7. Connecting groove; 8. Second mounting hole; 9. Third mounting hole; 10. Screw; 11. Spring; 12. Hexagonal sleeve; 13. Limiting hole; 14. Rotating shaft; 15. Locking block; 16. Torsion spring; 17. Mounting groove. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] like Figures 1-6 As shown, a heat and smoke sensing fire detector that is easy to assemble and disassemble includes a fire detector 1, an inner ring shell 2, and multiple fasteners. The outer peripheral wall of the fire detector 1 is fixedly connected to the inner ring shell 2. The outer peripheral wall of the inner ring shell 2 has an annular groove 5. The bottom of the inner wall of the annular groove 5 has a shielding groove 6. The outer peripheral wall of the inner ring shell 2 is slidably fitted with an outer ring shell 3. The inner wall of the outer ring shell 3 has a connecting groove 7. The outer peripheral wall of the inner ring shell 2 has a first flange 201. The outer peripheral wall of the outer ring shell 3 has a second flange 301. The first flange 201 is slidably connected to the inner wall of the connecting groove 7. The second flange 301 is slidably connected to the annular groove 5. The fasteners pass through the second flange 301, the first flange 201, and the outer ring shell 3 from bottom to top and extend to their outer sides. The hexagonal head on the fastener is located inside the outer ring shell 3. A spring 11 is fitted on the fastener. One end of the spring 11 abuts against the inner ring shell 2, and the other end of the spring 11 abuts against the outer ring shell 3.

[0023] By setting up an inner ring shell 2, an outer ring shell 3, an annular groove 5, and a shielding groove 6, after installation, when the fire detector 1 is loosened, the inner ring shell 2 moves upward under the pulling force of the spring 11, and the hexagonal head on the fastener is stored in the shielding groove 6.

[0024] The fastener includes a screw 10 and a hexagonal sleeve 12. The hexagonal sleeve 12 is located in the shielding groove 6 and is fitted onto the outer wall of the screw 10. The inner wall of the hexagonal sleeve 12 has two mounting grooves 17, and the outer wall of the screw 10 has a limiting hole 13.

[0025] A rotating shaft 14 is fixedly connected to the inner wall of the mounting groove 17. A locking block 15 is rotatably connected to the outer circumference of the rotating shaft 14. A torsion spring 16 is sleeved on the outer wall of the rotating shaft 14. The locking block 15 is engaged with the limiting hole 13. One end of the torsion spring 16 is fixedly connected to the locking block 15, and the other end of the torsion spring 16 is fixedly connected to the hexagonal sleeve 12.

[0026] The locking block 15 engages with the limiting hole 13, and under the action of the torsion spring 16, the screw 10 and the hexagonal sleeve 12 are automatically locked, preventing the screw 10 from loosening due to vibration during use, and facilitating the installation of the screw 10.

[0027] The inner ring shell 2 has multiple first mounting holes 4 at its top, and the end of the screw 10 passes through the first mounting holes 4 and extends to its outer side. The outer ring shell 3 has multiple third mounting holes 9 at its top and multiple second mounting holes 8 at its bottom, and the end of the screw 10 passes through the second mounting holes 8 and the third mounting holes 9.

[0028] Fire detector 1 can be a point-type composite smoke and heat fire detector, brand name Haiwan, model JTF-GOF-GST9713.

[0029] Working principle: First, the fire detector 1 is coaxially fixed inside the inner ring shell 2. The outer ring shell 3 is slidably sleeved on the outer peripheral wall of the inner ring shell 2. The screw 10 is extended from top to bottom through the third mounting hole 9, the first mounting hole 4, the spring 11 and the second mounting hole 8 into the annular groove 5.

[0030] The hexagonal sleeve 12 is placed on the lower end of the screw 10. When the hexagonal sleeve 12 is rotated, the locking block 15 rotates to the corresponding position of the limiting hole 13. Under the action of the torsion spring 16, the locking block 15 is inserted into the limiting hole 13 of the screw 10, thus fixing the screw 10 and the hexagonal sleeve 12.

[0031] During installation, pulling down the fire detector 1 moves the inner ring shell 2. The first flange 201 on the inner ring shell 2 slides down along the inner wall of the connecting groove 7. At the same time, the inner ring shell 2 compresses the spring 11 downward, exposing the hexagonal sleeve 12. Rotating the hexagonal sleeve 12 drives the screw 10 to rotate.

[0032] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat and smoke sensing fire detector that is easy to assemble and disassemble, comprising a fire detector (1), an inner ring shell (2), and a plurality of fasteners, characterized in that: The outer peripheral wall of the fire detector (1) is fixedly connected to the inner ring shell (2). The outer peripheral wall of the inner ring shell (2) is provided with an annular groove (5). The bottom of the inner wall of the annular groove (5) is provided with a shielding groove (6). The outer peripheral wall of the inner ring shell (2) is slidably fitted with an outer ring shell (3). The inner wall of the outer ring shell (3) is provided with a connecting groove (7). The outer peripheral wall of the inner ring shell (2) is provided with a first flange (201). The outer peripheral wall of the outer ring shell (3) is provided with a second flange (301). The first flange (201) is slidably connected to the inner wall of the connecting groove (7). The second flange (301) is slidably connected to the annular groove (5). The fastener passes through the second flange (301), the first flange (201) and the outer ring shell (3) from bottom to top and extends to its outer side. The hexagonal head on the fastener is located inside the outer ring shell (3). The fastener is fitted with a spring (11).

2. The easily detachable heat and smoke-sensing fire detector according to claim 1, characterized in that: One end of the spring (11) abuts against the inner ring shell (2), and the other end of the spring (11) abuts against the outer ring shell (3).

3. The easily detachable heat and smoke-sensing fire detector according to claim 2, characterized in that: The fastener includes a screw (10) and a hexagonal sleeve (12). The hexagonal sleeve (12) is located in the shielding groove (6). The hexagonal sleeve (12) is fitted on the outer wall of the screw (10). The inner wall of the hexagonal sleeve (12) has two mounting grooves (17). The outer wall of the screw (10) has a limiting hole (13).

4. The easily detachable heat and smoke-sensing fire detector according to claim 3, characterized in that: The inner wall of the mounting groove (17) is fixedly connected to a rotating shaft (14), and a locking block (15) is rotatably connected to the outer circumference of the rotating shaft (14). A torsion spring (16) is sleeved on the outer wall of the rotating shaft (14), and the locking block (15) engages with the limiting hole (13).

5. The easily detachable heat and smoke-sensing fire detector according to claim 4, characterized in that: One end of the torsion spring (16) is fixedly connected to the locking block (15), and the other end of the torsion spring (16) is fixedly connected to the hexagonal sleeve (12).

6. The easily detachable heat and smoke-sensing fire detector according to claim 5, characterized in that: The inner ring shell (2) has multiple first mounting holes (4) at its top, and the end of the screw (10) passes through the first mounting holes (4) and extends to its outer side.

7. The easily detachable heat and smoke-sensing fire detector according to claim 6, characterized in that: The outer ring shell (3) has multiple third mounting holes (9) at the top and multiple second mounting holes (8) at the bottom. The end of the screw (10) passes through the second mounting holes (8) and the third mounting holes (9).

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