Harmful gas alarm fixing structure

Abstract

The utility model relates to the technical field of gas alarms, and particularly discloses a harmful gas alarm fixing structure which comprises a fixing seat and a gas suction assembly arranged in the fixing seat, a communication cavity used for containing the gas suction assembly is formed in the fixing seat, and a containing cavity used for containing a harmful gas alarm is inwards formed in the bottom of the fixing seat. A positioning plate used for fixing the harmful gas alarm is arranged in the containing cavity, a gas inlet cavity and a gas outlet cavity which are communicated with the two ends of the communication cavity respectively are formed in the fixing base, a plurality of gas inlets and gas outlets which are communicated with the gas inlet cavity and the gas outlet cavity respectively are further formed in the fixing base, and the gas outlets face a filter screen of the harmful gas alarm. The problems that in the long-term use process of a traditional gas alarm, dust is prone to being accumulated on a filter screen on a gas inlet, but the gas alarm is inconvenient to clean due to the fact that the fixing position of the gas alarm is too high are solved.

Description

Technical Field

[0001] The present application relates to the technical field of gas alarms, and specifically discloses a fixing structure for a harmful gas alarm. Background Art

[0002] Gas alarms are mainly used for detecting and alarming combustible gases, toxic gases and other harmful gases indoors. They are installed indoors through a fixing structure and used to detect the gases in the indoor air where they are located.

[0003] In the existing gas alarm, an air inlet is provided at the bottom, and indoor gas enters the gas alarm through the air inlet for detection. However, during long-term use, for a gas alarm with a filter screen covering the air inlet to prevent dust from entering, during its long-term use, a lot of filtered dust will adhere to the outside of the filter screen, thereby causing blockage of the filter screen and the air inlet, affecting the normal use of the gas alarm.

[0004] At the same time, gas alarms are usually installed at a high position on the wall or on the ceiling of the room, making it difficult to clean the air inlet of the gas alarm.

[0005] Therefore, in view of this, the inventor provides a fixing structure for a harmful gas alarm to solve the above problems. Content of the Utility Model

[0006] The purpose of the present utility model is to solve the problem that the filter screen on the air inlet of the traditional gas alarm is prone to dust accumulation during long-term use, but it is not easy to clean due to the too high fixing position of the gas alarm.

[0007] To achieve the above purpose, the basic scheme of the present utility model provides a fixing structure for a harmful gas alarm, including: a fixing base and a suction assembly arranged in the fixing base. A communication chamber for accommodating the suction assembly is opened in the fixing base. An accommodation chamber for accommodating the harmful gas alarm is inwardly opened at the bottom of the fixing base. A positioning plate for fixing the harmful gas alarm is arranged in the accommodation chamber. An air inlet chamber and an air outlet chamber respectively communicated with both ends of the communication chamber are opened on the fixing base. A plurality of air inlets and air outlets respectively communicated with the air inlet chamber and the air outlet chamber are also opened on the fixing base, and the air outlet is arranged facing the filter screen of the harmful gas alarm.

[0008] Further, the suction assembly includes a rotating shaft rotatably connected in the communication chamber, fan blades circumferentially fixed on the rotating shaft, and a driving structure arranged in the accommodation chamber for driving the rotating shaft to rotate.

[0009] Further, the positioning plate is slidably connected in the accommodation chamber, and a spring pressing structure for pressing the positioning plate outward is arranged in the accommodation chamber.

[0010] Further, a through hole for communicating the accommodation chamber and the communication chamber is formed in the fixed seat. The driving structure includes a transmission shaft rotatably connected in the through hole and perpendicular to the rotating shaft, a driven gear coaxially fixed on the transmission shaft, and a bevel gear transmission mechanism respectively arranged between the ends of the transmission shaft and the rotating shaft. A rack meshing with the driven gear is fixedly connected to the positioning plate.

[0011] Further, a plurality of air inlets and air outlets respectively communicating with the air inlet chamber and the air outlet chamber are circumferentially formed on the fixed seat.

[0012] Further, a screen is detachably connected to the air inlet.

[0013] The principle and effect of this solution are as follows:

[0014] 1. Compared with the prior art, the harmful gas alarm is installed by the positioning plate in the present utility model, and the accommodation chamber is used to protect the harmful gas alarm. During the use of the harmful gas alarm, the air suction assembly installed in the fixed seat sucks the external air into the communication chamber through the air inlet and the air inlet chamber and discharges it through the air outlet chamber and the air outlet, and blows the dust attached to the filter screen of the harmful gas alarm through the air outlet, solving the problem that the filter screen on the air inlet of the traditional gas alarm is prone to dust accumulation during long-term use, but it is not easy to clean due to the too high fixed position of the gas alarm.

[0015] 2. Compared with the prior art, the air suction assembly of the present utility model completes air suction by directly driving the rotating shaft to rotate by the driving structure to drive the fan blades to rotate synchronously. At the same time, the driving structure is composed of a transmission shaft, a driven gear and a bevel gear transmission mechanism, and the power source is the rack installed on the positioning plate. When it is necessary to clean the filter screen of the harmful gas alarm, the harmful gas alarm is lifted upward by an external rod, driving the positioning plate and the rack to rise synchronously. The transmission shaft is driven to rotate by the meshing of the rack and the driven gear, and the rotating shaft is driven to rotate by the bevel gear transmission rod mechanism to suck in the external air and blow it to the filter screen of the harmful gas alarm, and then the positioning plate falls and resets by the spring pressing structure and the self-weight of the harmful gas alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Fig. shows a schematic diagram of a fixing structure for a harmful gas alarm proposed in an embodiment of the present application;

[0018] Figure 2 The cross-sectional view of a fixing structure of a harmful gas alarm proposed by an embodiment of the present application is shown;

[0019] Figure 3 The partial schematic diagram of a fixing structure of a harmful gas alarm proposed by an embodiment of the present application is shown. Specific embodiments

[0020] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and their effects according to the present utility model.

[0021] The reference numerals in the drawings of the specification include: fixing base 1, air inlet 2, air inlet chamber 3, air outlet chamber 4, positioning plate 5, harmful gas alarm 6, rotating shaft 7, fan blade 8, driven bevel gear 9, driving bevel gear 10, rack 11, through hole 12, spring 13, driven gear 14.

[0022] A fixing structure of a harmful gas alarm, as shown in embodiments such as Figure 1 and Figure 2 shown:

[0023] It includes a fixing base 1 and an air suction assembly installed in the fixing base 1. A communicating chamber for accommodating the air suction assembly is opened in the fixing base 1. In this embodiment, the fixing base 1 is connected to the wall surface by bolts.

[0024] An accommodation chamber for accommodating the harmful gas alarm 6 is inwardly opened at the bottom of the fixing base 1. At the same time, a slidable positioning plate 5 is installed in the accommodation chamber. The harmful gas alarm 6 is fixedly installed on the positioning plate 5 by bolts. An air inlet chamber 3 and an air outlet chamber 4 respectively communicating with the top end and the bottom end of the communicating chamber are also opened in the fixing base 1. At the same time, a plurality of air inlets 2 respectively communicating with the air inlet chamber 3 are opened around the top of the fixing base 1, and a plurality of air outlets respectively communicating with the air outlet chamber 4 are opened around the bottom end of the fixing base 1. And the air outlets are all opened in the accommodation chamber and face the filter direction of the harmful gas alarm 6. And screens are respectively installed in the air inlets 2 by screws.

[0025] Through holes are respectively opened on both sides of the positioning plate 5. Two sets of spring 13 pressing structures for pressing the positioning plate 5 outward are installed at the top of the accommodation chamber. The spring 13 pressing structure includes a sleeve fixedly installed at the top of the accommodation chamber, a sliding rod with the top end installed in the sleeve and the top end only being able to slide in the sleeve, and a spring 13 sleeved outside the sleeve. The bottom ends of the sliding rods respectively pass through the through holes on the same side and a ring plate is fixedly installed at the end of the sliding rod extending out of the through hole. The ring plate abuts against the bottom surface of the positioning plate 5. The spring 13 is located between the top surface of the accommodation chamber and the top surface of the positioning plate 5 and is used for pressing the positioning plate 5 outward.

[0026] As Figure 3 shown, in this embodiment, a rotating hole is opened at the top of the communication chamber. The air suction assembly includes a rotating shaft 7 whose top end is installed in the rotating hole and can rotate, two fan blades 8 circumferentially and fixedly installed on the rotating shaft 7, and a driving structure installed at the bottom of the rotating shaft 7.

[0027] A through hole for communicating the accommodation chamber and the communication chamber is also opened in the fixed seat 1. The driving structure includes a transmission shaft installed in the through hole and capable of rotating, and the axis direction of the transmission shaft is perpendicular to the axis direction of the rotating shaft 7. A driven gear 14 is coaxially and fixedly installed on the transmission shaft, and a bevel gear transmission mechanism is installed between the end parts of the transmission shaft and the rotating shaft 7. The bevel gear transmission mechanism includes a driving bevel gear 10 coaxially and fixedly installed on the transmission shaft and a driven bevel gear 9 coaxially and fixedly installed on the rotating shaft 7. A rack 11 is fixedly installed on the positioning plate 5, and the rack 11 meshes with the driven gear 14.

[0028] When the utility model is in use, a harmful gas alarm 6 is installed through the positioning plate 5. During the use of the harmful gas alarm 6, the accommodation chamber protects the harmful gas alarm 6.

[0029] After long-term use, the harmful gas alarm 6 is jacked up by an external rod, driving the positioning plate 5 and the rack 11 to rise synchronously. The rotation of the transmission shaft is driven by the meshing of the rack 11 and the driven gear 14, and the rotation of the rotating shaft 7 is driven by the bevel gear transmission rod mechanism to suck in external air and blow it onto the filter screen of the harmful gas alarm 6 to blow off the dust attached to the filter screen. Then, the positioning plate 5 falls and resets under the action of the spring 13 pressing structure and the self-weight of the harmful gas alarm 6.

[0030] During the reset process, the rack 11 drives the driven gear 14 to reverse, and the fan blade 8 reverses and blows air from the air outlet to the air inlet 2 to blow off the dust attached to the sieve mesh.

[0031] The above is only a preferred embodiment of the utility model, and it does not impose any form of limitation on the utility model. Although the utility model has been disclosed above with a preferred embodiment, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to make equivalent embodiments with equivalent changes, but as long as it does not depart from the technical content of the utility model, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the utility model still fall within the scope of the technical solution of the utility model.

Claims

1. A fixing structure for a harmful gas alarm, characterized in that, Comprising: A fixed seat and an air suction assembly disposed within the fixed seat. A communicating chamber for accommodating the air suction assembly is formed within the fixed seat. An accommodating chamber for accommodating a harmful gas alarm is recessed inwardly at the bottom of the fixed seat. A positioning plate for fixing the harmful gas alarm is provided within the accommodating chamber. An air inlet chamber and an air outlet chamber that are respectively communicated with both ends of the communicating chamber are formed on the fixed seat. A plurality of air inlets and air outlets that are respectively communicated with the air inlet chamber and the air outlet chamber are further formed on the fixed seat. The air outlet is arranged facing the filter screen of the harmful gas alarm.

2. The fixed structure of a harmful gas alarm according to claim 1, characterized in that The air suction assembly includes a rotating shaft rotatably connected within the communicating chamber, fan blades circumferentially fixed to the rotating shaft, and a driving structure disposed within the accommodating chamber for driving the rotating shaft to rotate.

3. The fixed structure of a harmful gas alarm according to claim 2, characterized in that, The positioning plate is slidably connected within the accommodating chamber, and a spring pressing structure for pressing the positioning plate outward is provided within the accommodating chamber.

4. A fixing structure for a harmful gas alarm according to claim 3, characterized in that, A through hole for communicating the accommodating chamber with the communicating chamber is formed within the fixed seat. The driving structure includes a transmission shaft rotatably connected within the through hole and perpendicular to the rotating shaft, a driven gear coaxially fixed to the transmission shaft, and a bevel gear transmission mechanism respectively disposed between the ends of the transmission shaft and the rotating shaft. A rack meshing with the driven gear is fixed to the positioning plate.

5. The fixed structure of a harmful gas alarm according to claim 1, characterized in that A plurality of air inlets and air outlets that are respectively communicated with the air inlet chamber and the air outlet chamber are circumferentially formed on the fixed seat.

6. The fixed structure of a harmful gas alarm according to claim 1, characterized in that, The air inlet is detachably connected with a screen.

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