Laboratory fire alarm

Abstract

The utility model discloses a laboratory fire alarm, which comprises a shell and smoke inlets arranged on the shell and distributed circumferentially, a horizontal support rod is rotatably arranged at the center of the bottom of the shell, the other end of the support rod is fixedly provided with a brush rod through a bolt, the brush rod is fixedly connected with a brush, and the brush rod is fixedly connected with the shell. A brush is arranged in the shell, the brush does circular motion with the center of the shell as a rotating shaft to clean the smoke inlet, a motor is fixedly installed at the end of the supporting rod, the output end of the motor is fixedly connected with a gear, a gear ring is fixedly installed at the bottom of the shell, and the gear and the gear ring are in meshing transmission. According to the utility model, the motor is started to drive the gear to rotate, the gear rotates along the gear ring, and meanwhile, the brush rod does circular motion by taking the center of the shell as the rotating axis, so that the brush cleans the smoke inlet, removes dust and prevents the smoke inlet from being blocked, and smoke can smoothly enter the smoke inlet when a fire disaster occurs; therefore, fire detection and alarm can be smoothly realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fire alarms, in particular to a laboratory fire alarm. Background Art

[0002] In order to enable students to truly master and become familiar with the knowledge and techniques they have learned, students are often arranged to conduct experiments in the laboratory, which can effectively improve students' mastery of knowledge. However, some chemicals are relatively dangerous, and students are prone to cause fires during experiments. Fire alarms, as a small and efficient early warning device, are of great significance in laboratory fire safety protection requirements. When a fire occurs, the smoke rises and reaches under the ceiling. The smoke alarm detects the fire through the smoke. When the alarm is sounded, the alarm emits a sharp and piercing sound.

[0003] When the existing fire smoke alarm is stored in an environment, dust in the environment is easily accumulated at the smoke inlet, causing blockage. When a fire occurs, the detection of smoke is affected and is not sensitive enough. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a laboratory fire alarm, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical scheme: a laboratory fire alarm, including a shell, a smoke inlet distributed in a circular pattern on the shell, a horizontal support rod rotatably arranged at the center of the bottom of the shell, a brush rod is fixedly installed on the other end of the support rod by bolts, a brush is fixedly connected to the brush rod, and the brush makes a circular motion with the center of the shell as the rotating axis to clean the smoke inlet.

[0008] Preferably, a motor is fixedly mounted on the end of the support rod, a gear is fixedly connected to the output end of the motor, a gear ring is fixedly mounted on the bottom of the housing, and the gear is meshed with the gear ring for transmission.

[0009] Preferably, a through hole is formed at the end of the support rod, a screw hole is formed at the bottom of the brush rod, and the threaded end of the bolt passes through the through hole and is screwed into the screw hole.

[0010] Preferably, a positioning pin is fixedly connected to the top of the support rod, and a positioning hole is opened at the bottom of the brush rod. When the brush rod is installed, the upper end of the positioning pin is inserted into the positioning hole.

[0011] Preferably, the positioning hole is an elliptical hole, the positioning pin is an elliptical cylindrical pin, and the positioning pin matches the positioning hole.

[0012] (III) Beneficial effects

[0013] The utility model provides a laboratory fire alarm, which has the following beneficial effects:

[0014] 1. In the utility model, by starting the motor, the gear is driven to rotate, and the gear rotates along the gear ring, and at the same time, the brush rod makes a circular motion with the center of the shell as the rotation axis, so that the brush cleans the smoke inlet, removes dust, and avoids the smoke inlet from being blocked, thereby ensuring that when a fire occurs, the smoke can smoothly enter the smoke inlet, thereby smoothly realizing the detection and alarm of the fire.

[0015] 2. In the utility model, the brush rod and the support rod are detachably connected, which makes it convenient to disassemble the brush for cleaning and remove dust on the surface, thereby ensuring that the smoke inlet can be cleaned normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front perspective structural diagram of a laboratory fire alarm proposed by the utility model;

[0017] Figure 2 This is a bottom-up stereoscopic structural diagram of a laboratory fire alarm proposed by the utility model;

[0018] Figure 3 This is a disassembled structure diagram of a laboratory fire alarm proposed by the utility model;

[0019] Figure 4 The utility model discloses a brush rod and a brush connection structure diagram of a laboratory fire alarm.

[0020] In the figure: 1, shell; 101, smoke inlet; 2, gear ring; 3, support rod; 301, through hole; 4, brush rod; 401, screw hole; 402, positioning hole; 5, brush; 6, bolt; 7, motor; 8, gear; 9, positioning pin. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a laboratory fire alarm, comprising a shell 1, a smoke inlet 101 arranged on the shell 1 in a circumferential distribution, a horizontal support rod 3 is rotatably arranged at the bottom center of the shell 1, a brush rod 4 is fixedly installed at the other end of the support rod 3 by a bolt 6, a brush 5 is fixedly connected to the brush rod 4, and the brush 5 makes a circular motion with the center of the shell 1 as the rotation axis to clean the smoke inlet 101.

[0023] A motor 7 is fixedly mounted on the end of the support rod 3, a gear 8 is fixedly connected to the output end of the motor 7, a gear ring 2 is fixedly mounted on the bottom of the housing 1, and the gear 8 meshes with the gear ring 2 for transmission.

[0024] By starting the motor 7, the gear 8 is driven to rotate, and the gear 8 rotates along the ring gear 2, and at the same time, the brush rod 4 makes a circular motion with the center of the shell 1 as the rotation axis, so that the brush 5 cleans the smoke inlet 101 to remove dust and avoid blockage of the smoke inlet 101, thereby ensuring that when a fire occurs, smoke can smoothly enter the smoke inlet 101, thereby smoothly realizing the detection and alarm of the fire.

[0025] In the cooperation between the ring gear 2 and the gear 8, it is very important to apply lubricating oil, which can reduce the friction and wear between the ring gear 2 and the gear 8, reduce the noise and energy loss of the transmission system, and extend the service life of the transmission parts.

[0026] A through hole 301 is formed at the end of the support rod 3 , a screw hole 401 is formed at the bottom of the brush rod 4 , and a threaded end of the bolt 6 passes through the through hole 301 and is screwed into the screw hole 401 .

[0027] The brush rod 4 and the support rod 3 are detachably connected, which makes it easy to disassemble the brush 5 for cleaning and remove dust on the surface, ensuring that the smoke inlet 101 can be cleaned normally; when disassembling, it is only necessary to loosen the bolt 6 and move the end of the bolt 6 out of the screw hole 401; when installing again, screw the threaded end of the bolt 6 into the screw hole 401 to fix the brush rod 4.

[0028] The cleaning brush 5 is generally made of a soft, highly absorbent material to facilitate the removal of dust and fine particles. Common cleaning brush materials include the following materials: horsehair is a high-quality brush material with good softness and elasticity and strong adsorption, so it is widely used in making cleaning brushes. The advantage of horsehair brushes is that they are not easy to fall off.

[0029] In addition, a positioning pin 9 is fixedly connected to the top of the support rod 3 , and a positioning hole 402 is opened at the bottom of the brush rod 4 . When the brush rod 4 is installed, the upper end of the positioning pin 9 is inserted into the positioning hole 402 .

[0030] The positioning hole 402 is an elliptical hole, and the positioning pin 9 is an elliptical cylindrical pin. The positioning pin 9 matches the positioning hole 402. In order to guide the brush rod 4 during installation, the positioning pin 9 is inserted into the positioning hole 402 to achieve the positioning purpose. In this way, the brush rod 4 will not shake after installation.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A laboratory fire alarm, characterized in that: The invention comprises a shell (1) and smoke inlets (101) which are arranged on the shell (1) in a circumferential distribution. A horizontal support rod (3) is rotatably arranged at the center of the bottom of the shell (1). A brush rod (4) is fixedly mounted on the other end of the support rod (3) via a bolt (6). A brush (5) is fixedly connected to the brush rod (4). The brush (5) moves in a circle with the center of the shell (1) as the rotation axis to clean the smoke inlet (101).

2. A laboratory fire alarm according to claim 1, characterized in that: A motor (7) is fixedly mounted on the end of the support rod (3), a gear (8) is fixedly connected to the output end of the motor (7), a gear ring (2) is fixedly mounted on the bottom of the housing (1), and the gear (8) meshes with the gear ring (2) for transmission.

3. A laboratory fire alarm according to claim 1, characterized in that: A through hole (301) is provided at the end of the support rod (3), a screw hole (401) is provided at the bottom of the brush rod (4), and the threaded end of the bolt (6) passes through the through hole (301) and is screwed into the screw hole (401).

4. A laboratory fire alarm according to claim 3, characterized in that: A positioning pin (9) is fixedly connected to the top of the support rod (3), and a positioning hole (402) is opened at the bottom of the brush rod (4). When the brush rod (4) is installed, the upper end of the positioning pin (9) is inserted into the positioning hole (402).

5. A laboratory fire alarm according to claim 4, characterized in that: The positioning hole (402) is an elliptical hole, the positioning pin (9) is an elliptical cylindrical pin, and the positioning pin (9) matches the positioning hole (402).

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