Smoke fire detection device

Abstract

The utility model provides a smoke-sensing fire detection device, belongs to the technical field of fire-fighting alarm, and aims to solve the problem that dust enters the alarm from a smoke inlet and then is attached to an inductive sensor to influence the sensitivity of the inductive sensor in the long-term use process of an existing smoke alarm. Comprising an alarm, the alarm comprises a smoke inlet located in the side wall of the alarm, and a filter screen is embedded in the smoke inlet; a transmission rod is rotationally connected to the end of the alarm, a mounting plate is hinged to the end of the transmission rod, and a dust removal brush is arranged on the side, facing the alarm, of the mounting plate; one end of the elastic piece is connected with the mounting plate, and the other end of the elastic piece is connected with the transmission rod; according to the utility model, the filter screen can prevent a large amount of external dust from entering the alarm to influence the sensitivity of the inductive sensor, and the transmission rod and the dust removal brush can clean the filter screen to prevent the dust from being attached to the filter screen.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire alarm, and in particular relates to a smoke fire detection device. Background Art

[0002] Smoke alarm is actually another name for smoke sensor. Smoke alarm prevents fire by monitoring the concentration of smoke. It is generally composed of two parts, a sensor for detecting smoke and an electronic speaker with a very loud sound. There is a smoke inlet on the side wall of the alarm, and smoke enters the alarm from the smoke inlet to trigger the sensor.

[0003] Smoke alarms are suitable for office buildings, homes, shops, warehouses, hotel rooms, leisure and entertainment venues, Internet cafes and other buildings. Once the indoor smoke concentration changes are detected, a local alarm will be issued immediately, and the crowd can be informed to open the fire water valve in time before the fire spreads, so that the fire can be controlled in time at the early stage of the fire;

[0004] At present, during the long-term use of the smoke alarm, dust will enter the alarm from the smoke inlet and then adhere to the induction sensor, affecting the sensitivity of the induction sensor. Utility Model Content

[0005] In view of this, the utility model provides a smoke fire detection device to solve the problem that during long-term use of the existing smoke alarm, dust will enter the alarm from the smoke inlet and then adhere to the induction sensor, affecting the sensitivity of the induction sensor.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A smoke fire detection device comprises an alarm, wherein the alarm comprises a smoke inlet located on its side wall, wherein a filter is embedded in the smoke inlet; the end of the alarm is rotatably connected to a transmission rod, the end of the transmission rod is hinged to a mounting plate, a dust removal brush is provided on the side of the mounting plate facing the alarm, and the dust removal brush is in contact with the filter; and an elastic member is also included, wherein one end of the elastic member is connected to the mounting plate, and the other end is connected to the transmission rod.

[0008] In this technical solution, it should be noted that by setting a filter at the smoke inlet of the alarm, dust can be blocked to prevent a large amount of dust from entering the alarm and affecting the sensitivity of the induction sensor inside the alarm; and it should be further noted that if a large amount of dust adheres to the outside of the filter, it will affect the entry of smoke into the alarm. Therefore, in this solution, a transmission rod and a dust removal brush are provided. When a large amount of dust adheres to the outside of the filter, the transmission rod is rotated, and the transmission rod drives the dust removal brush on the mounting plate to rotate, and the dust removal brush scrapes the surface of the filter to remove the dust. Furthermore, in this application, the elastic member provided can make the mounting plate always subject to the pulling force of the elastic member, so that the dust removal brush can be pressed against the outer wall of the alarm to improve the dust removal effect.

[0009] Preferably, a motor is provided in the alarm, an output shaft of the motor passes through the end of the alarm and is connected to a transmission rod, and the output shaft is rotationally connected to the alarm.

[0010] In this technical solution, it should be noted that the motor can be a battery-powered motor. This solution drives the dust removal brush to rotate by driving the transmission rod to rotate through the motor. The staff can set a button electrically connected to the motor at a suitable location in the building. That is, when the alarm needs to be dusted, the staff only needs to press the button to start the motor, which is convenient and quick.

[0011] Preferably, an annular groove is provided at the end of the alarm, and the annular groove surrounds the center of the end of the alarm. A support rod is provided at the bottom of the transmission rod, and the support rod is slidably embedded in the annular groove; a pulley is rotatably connected to the bottom of the support rod, and the pulley is slidably connected to the annular groove.

[0012] In this technical solution, it should be noted that since the transmission rod is arranged along the diameter direction of the end of the alarm, if no support rod is provided, the stability of the transmission rod will be low, and it will be easy to deform or break after long-term use. Therefore, this solution is provided with a support rod and a pulley. The transmission rod is supported by the support rod to improve the stability of the transmission rod. The pulley provided can reduce the friction between the support rod and the annular groove, reduce friction loss, and increase service life.

[0013] Preferably, the elastic member is a spring.

[0014] In this technical solution, it should be noted that in this solution, the spring is in a pulled-up state and can always give the mounting plate an inward pulling force. A spring is a mechanical part that works by using elasticity. Parts made of elastic materials deform under the action of external forces and return to their original shape after the external forces are removed. Also called "spring". Generally made of spring steel. There are many types of springs, and according to their shapes, they mainly include helical springs, scroll springs, leaf springs, special-shaped springs, etc.

[0015] Preferably, there are two transmission rods, and the two transmission rods are symmetrically arranged.

[0016] In this technical solution, it should be noted that the cleaning effect can be increased due to the provision of two transmission rods. Secondly, due to the symmetrical arrangement of the two transmission rods, both sides of the output shaft are in a balanced state, the force is stable, and the service life is extended.

[0017] Preferably, the transmission rod is detachably connected to the output shaft of the motor; an external thread is provided on the outer wall of the output shaft, two nuts are threadedly connected to the output shaft, the transmission rod is sleeved on the output shaft, and the transmission rod is located between the two nuts.

[0018] In this technical solution, it should be noted that setting the transmission rod and the output shaft as a detachable connection can facilitate the removal or replacement of the dust brush. When the dust brush needs to be installed, the transmission rod is placed between the two nuts and then the nuts are tightened. If necessary, a gasket can be added between the nut and the transmission rod.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. In the utility model, the filter screen can prevent a large amount of external dust from entering the alarm and affecting the sensitivity of the induction sensor. The transmission rod and the dust removal brush can be used to clean the filter screen to prevent dust from adhering to the filter screen, so that smoke cannot enter the alarm through the smoke inlet. At the same time, the elastic member can be used to tighten the mounting plate, so that the dust removal brush can be pressed against the outer wall of the alarm, thereby improving the cleaning effect.

[0021] 2. In the utility model, a support rod and a pulley are provided. The transmission rod is supported by the provided support rod to improve the stability of the transmission rod. The provided pulley can reduce the friction between the support rod and the annular groove, reduce friction loss, and increase service life;

[0022] 3. In the utility model, since two transmission rods are provided, the cleaning effect can be increased. Secondly, since the two transmission rods are symmetrically arranged, the two sides of the output shaft are in a balanced state, the force is stable, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0026] Figure 3It is a partial three-dimensional structural schematic diagram of the utility model.

[0027] Reference numerals

[0028] 10-alarm, 11-smoke inlet, 12-filter, 13-induction sensor, 20-motor, 21-output shaft, 22-external thread, 30-transmission rod, 31-mounting plate, 32-elastic part, 33-dust brush, 34-nut, 40-annular groove, 41-support rod, 42-pulley. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme 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. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0035] Example

[0036] like Figure 1-3 As shown, the utility model discloses a smoke fire detection device, including an alarm 10, wherein the alarm 10 includes a smoke inlet 11 located on its side wall, and a filter 12 is embedded in the smoke inlet 11; the end of the alarm 10 is rotatably connected to a transmission rod 30, and the end of the transmission rod 30 is hinged with a mounting plate 31, and a dust removal brush 33 is provided on the side of the mounting plate 31 facing the alarm 10, and the dust removal brush 33 is in contact with the filter 12; and an elastic member 32 is also included, and one end of the elastic member 32 is connected to the mounting plate 31, and the other end is connected to the transmission rod 30. It should be noted that by arranging a filter 12 at the smoke inlet 11 of the alarm 10, dust can be blocked to prevent a large amount of dust from entering the alarm 10 and affecting the sensitivity of the induction sensor 13 inside the alarm 10; and it should be further noted that if a large amount of dust adheres to the outside of the filter 12, it will affect the entry of smoke into the alarm 10. Therefore, in this solution, a transmission rod 30 and a dust removal brush 33 are provided. When a large amount of dust adheres to the outside of the filter 12, the transmission rod 30 is rotated, and the transmission rod 30 drives the dust removal brush 33 on the mounting plate 31 to rotate, and the dust removal brush 33 brushes the surface of the filter 12 to remove the dust. Furthermore, in this application, the elastic member 32 is arranged so that the mounting plate 31 can always be subjected to the pulling force of the elastic member 32, so that the dust removal brush 33 can be pressed against the outer wall of the alarm 10 to improve the dust removal effect.

[0037] like Figure 2 As shown, in this embodiment, a motor 20 is provided in the alarm 10, and an output shaft 21 of the motor 20 passes through the end of the alarm 10 and is connected to the transmission rod 30, and the output shaft 21 is rotatably connected to the alarm 10. It should be noted that the motor 20 can be a battery-powered motor 20. In this solution, the transmission rod 30 is driven to rotate by the motor 20 to drive the dust removal brush 33 to rotate. The staff can set a button electrically connected to the motor 20 at a suitable position of the building, that is, when the alarm 10 needs to be dusted, the staff only needs to press the button to start the motor 20, which is convenient and quick.

[0038] like Figure 3As shown, in this embodiment, an annular groove 40 is provided at the end of the alarm 10, and the annular groove 40 surrounds the center of the end of the alarm 10. A support rod 41 is provided at the bottom of the transmission rod 30, and the support rod 41 is slidably embedded in the annular groove 40; the bottom of the support rod 41 is rotatably connected to a pulley 42, and the pulley 42 is slidably connected to the annular groove 40. It should be noted that since the transmission rod 30 is arranged along the diameter direction of the end of the alarm 10, if the support rod 41 is not provided, the stability of the transmission rod 30 is not high, and it is easy to deform or break after long-term use. Therefore, this solution is provided with a support rod 41 and a pulley 42, and the transmission rod 30 is supported by the support rod 41 to improve the stability of the transmission rod 30. The pulley 42 can reduce the friction between the support rod 41 and the annular groove 40, reduce friction loss, and improve service life.

[0039] like Figure 1 As shown, in this embodiment, the elastic member 32 is a spring. It should be noted that in this solution, the spring is in a pulled-up state and can always give the mounting plate 31 an inward pulling force. A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials deform under the action of external forces and return to their original shape after the external force is removed. Also called "spring". Generally made of spring steel. There are many types of springs, and according to their shapes, they mainly include helical springs, scroll springs, leaf springs, special-shaped springs, etc.

[0040] like Figure 1 As shown, in this embodiment, there are two transmission rods 30, and the two transmission rods 30 are symmetrically arranged. It should be noted that since two transmission rods 30 are provided, the cleaning effect can be increased. Secondly, since the two transmission rods 30 are symmetrically arranged, the two sides of the output shaft 21 are in a balanced state, the force is stable, and the service life is extended.

[0041] like Figure 1 As shown, in this embodiment, the transmission rod 30 is detachably connected to the output shaft 21 of the motor 20; an external thread 22 is provided on the outer wall of the output shaft 21, and two nuts 34 are threadedly connected to the output shaft 21. The transmission rod 30 is sleeved on the output shaft 21, and the transmission rod 30 is located between the two nuts 34. It should be noted that the detachable connection between the transmission rod 30 and the output shaft 21 can facilitate the removal or replacement of the dust removal brush 33. When the dust removal brush 33 needs to be installed, the transmission rod 30 is placed between the two nuts 34, and then the nuts 34 are tightened. If necessary, a gasket can be added between the nuts 34 and the transmission rod 30.

[0042] The working principle of this embodiment is:

[0043] First, a nut 34 is screwed onto the output shaft 21, and then the transmission rod 30 is sleeved on the output shaft 21, and another nut 34 is screwed onto the output shaft 21, and then the two nuts 34 fix and clamp the transmission rod 30; when the filter 12 needs to be dusted, the staff can press a set external button, the motor 20 starts, and then drives the output shaft 21 to rotate. After the output shaft 21 rotates, it drives the transmission rod 30 and the dust removal brush 33 to rotate. The dust removal brush 33 cleans the filter 12 during the rotation process. At the same time, the dust removal brush 33 is always pressed against the outer wall of the alarm 10 under the action of the elastic member 32, thereby improving the cleaning effect.

[0044] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0045] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smoke fire detection device, characterized in that: The alarm device (10) comprises a smoke inlet (11) located on a side wall thereof, wherein a filter screen (12) is embedded in the smoke inlet (11); The end of the alarm (10) is rotatably connected to a transmission rod (30), the end of the transmission rod (30) is hinged to a mounting plate (31), a dust removal brush (33) is provided on the side of the mounting plate (31) facing the alarm (10), and the dust removal brush (33) is in contact with the filter screen (12); It also includes an elastic member (32), one end of the elastic member (32) is connected to the mounting plate (31), and the other end is connected to the transmission rod (30).

2. A smoke fire detection device according to claim 1, characterized in that: The alarm (10) is provided with a motor (20), an output shaft (21) of the motor (20) passes through the end of the alarm (10) and is connected to a transmission rod (30), and the output shaft (21) is rotatably connected to the alarm (10).

3. A smoke fire detection device according to claim 1, characterized in that: An annular groove (40) is provided at the end of the alarm (10), and the annular groove (40) surrounds the center of the end of the alarm (10). A support rod (41) is provided at the bottom of the transmission rod (30), and the support rod (41) is slidably embedded in the annular groove (40).

4. A smoke fire detection device according to claim 3, characterized in that: The bottom of the support rod (41) is rotatably connected to a pulley (42), and the pulley (42) is slidably connected to the annular groove (40).

5. A smoke fire detection device according to claim 1, characterized in that: The elastic member (32) is a spring.

6. A smoke fire detection device according to any one of claims 1 to 5, characterized in that: There are two transmission rods (30), and the two transmission rods (30) are symmetrically arranged.

7. A smoke fire detection device according to any one of claims 1 to 5, characterized in that: The transmission rod (30) is detachably connected to the output shaft (21) of the motor (20); An external thread (22) is provided on the outer wall of the output shaft (21), two nuts (34) are threadedly connected to the output shaft (21), the transmission rod (30) is sleeved on the output shaft (21), and the transmission rod (30) is located between the two nuts (34).

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