Gas leakage alarm device

Abstract

The utility model relates to the technical field of leakage alarm devices, and discloses a leakage alarm device for fuel gas, which is characterized in that a motor is mounted at the top of a shell, an output shaft of the motor penetrates through and extends into a channel, and fan blades are mounted on the outer wall of the output shaft of the motor. When gas leaks, gas enters from the conical gas inlet in the bottom of the shell, and the gas inlet is conical, so that the gas can be guided to enter the channel smoothly, a certain gas flow gathering effect is achieved, the leaked gas can be guided to the alarm assembly quickly, the detection reaction rate is increased, gas leakage can be found in time, and the detection efficiency is improved. The gas flow speed of 0.1 m / s to 1m / s is generally suitable for most environments, and the speed is enough to enable gas to be diffused to detection equipment, but the situation that the response time of the detection equipment is affected due to sudden change of the gas concentration caused by too strong gas flow is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a leakage alarm device technical field, concretely is a kind of for gas leakage alarm device. BACKGROUND

[0002] Gas is cheap, convenient to use, and gas pipelines are basically configured in urban communities. However, once the gas in the gas pipeline leaks, it will cause great safety hazards. The alarm device for gas pipeline leakage detection is a device for detecting indoor gas content to determine whether the gas leaks.

[0003] Application No. CN201921810320.8 discloses an alarm device for gas pipeline leakage detection, comprising a housing, an indicator light, a power switch, a detector and a buzzer. A ventilation hole is provided on the front surface of the housing. The indicator light and the power switch are provided below the ventilation hole, and the power switch is provided on the right side of the indicator light. A protective cover is provided on the front surface of the housing. A protective net is bonded to the front surface of the protective cover. A through hole is provided below the protective net. A sliding block is integrally connected to the inner surface of the protective cover. Sliding grooves are provided on the outer surfaces of both sides of the housing. A connecting shaft is integrally connected to the inner wall of the sliding groove. A torsional spring is provided on the outer surface of the connecting shaft. A limiting block is provided on the outer surface of the torsional spring. The detector is fixed to the inner side of the housing by screws. Although the utility model has an oil fume prevention structure, it is convenient to clean the ventilation hole, and it has a punch-free installation structure, which facilitates quick installation.

[0004] However, when the alarm device is used for a long time, the gas diffusion is not uniform, and if the gas diffusion position is far from the detector, it will cause the gas flow rate to the detector to be slow, affecting the response speed of the gas leakage detection. Utility model content

[0005] The utility model aims to provide a leakage alarm device for gas to solve the problems raised in the above background.

[0006] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a leakage alarm device for gas, comprising a housing, an installation ring fixedly connected to the outer wall of the housing, an installation plate inserted into one end of the installation ring, a plurality of installation holes provided on the outer wall of the installation plate, an air inlet provided at the bottom of the housing, a channel provided at the top of the air inlet, and an air outlet provided at the bottom of the channel and extending to the outside of the housing.

[0008] An alarm assembly is installed on the air outlet channel, and the alarm assembly extends to the outside of the housing.

[0009] The top of the shell is provided with a motor, the output shaft of the motor penetrates and extends to the inside of the channel, and a fan blade is arranged on the outer wall of the output shaft of the motor.

[0010] A conical filter screen for filtering gas is arranged on the inner wall of the bottom of the channel, and the gas inlet is conical.

[0011] The output shaft of the motor penetrates the conical filter screen, a limiting mounting assembly is arranged at the bottom end of the output shaft of the motor, and a roller brush for cleaning the conical filter screen is arranged on the outer wall of the limiting mounting assembly.

[0012] Further, the alarm assembly comprises a buzzer, the buzzer is arranged on the inner wall of the gas outlet channel, a detector is arranged at one end of the buzzer close to the inside of the channel, and an indicator lamp is arranged at the other end of the buzzer.

[0013] Further, a plurality of scrapers are arranged on the top of the conical filter screen and close to the inner wall of the channel.

[0014] Further, a scraper groove is arranged on the outer wall of the scraper for storing impurities.

[0015] Further, a slot is formed in the bottom of the shell, plate springs are fixedly connected to the two ends of the conical filter screen respectively, and the conical filter screen is arranged on the inner wall of the slot through the plate springs.

[0016] Further, the limiting mounting assembly comprises a connecting block arranged below the output shaft of the motor, two movable rods are slidably connected to the inside of the connecting block, a plurality of springs are connected between the two movable rods, a limiting block is fixedly connected to the top of the two movable rods, the limiting block is located on the outer side of the top of the connecting block, the movable rods extend to the inside of the output shaft of the motor, a limiting hole is formed in the bottom of the output shaft of the motor, and the limiting block is limitedly matched with the limiting hole.

[0017] The utility model has the following beneficial effects:

[0018] (1) the utility model discloses the setting of motor and fan blade, when the gas leakage exists, the gas enters from the conical gas inlet of the bottom of the shell, because the gas inlet is conical, this shape helps to guide the gas to enter the channel smoothly, plays a certain role of converging airflow, thereby the leaked gas is guided to the alarm assembly quickly, improves the reaction rate of detection, discovers the gas leakage in time, and 0.1m / s to 1m / s airflow speed is usually applicable to most environments, and this speed is enough to make the gas diffuse to the detection equipment, but the airflow is not too strong, so as to cause the sudden change of gas concentration, thereby affecting the response time of the detection equipment.

[0019] (2)The utility model discloses a roll brush is arranged, when motor rotates, roll brush can rotate together with motor output shaft, because roll brush is located near conical filter screen, its rotation can clean conical filter screen, prevent impurity from piling up too much on filter screen and influence filtering effect.

[0020] Of course, it is not necessary for implementing any product of the utility model to achieve all the advantages mentioned above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be to the embodiment description needed to use the drawing makes a simple introduction, obviously, the following description in the drawing only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0022] Figure 1 It is the whole structure schematic diagram of the utility model;

[0023] Figure 2 It is the internal structure section schematic diagram of the utility model;

[0024] Figure 3 It is the internal structure schematic diagram of the utility model;

[0025] Figure 4 It is the conical filter screen structure schematic diagram of the utility model;

[0026] Figure 5 It is the limiting installation assembly schematic diagram of the utility model;

[0027] Figure 6 It is the roll brush structure schematic diagram of the utility model;

[0028] Figure 7 It is the connecting block structure schematic diagram of the utility model;

[0029] In the drawing, the component list represented by each sign is as follows:

[0030] In the drawing: 1, shell;2, mounting ring;3, mounting plate;4, motor;401, limiting hole;5, buzzer;6, indicator lamp;7, limiting installation assembly;701, movable rod;702, spring;703, limiting block;704, connecting block;8, conical filter screen;801, leaf spring;9, roll brush;10, fan blade;11, scraper. DETAILED DESCRIPTION

[0031] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Please refer to Figure 1 - Figure 7 The utility model discloses a kind of leakage alarm devices for gas, including shell 1, the outer wall of shell 1 is fixedly connected with mounting ring 2, one end of mounting ring 2 is inserted with mounting plate 3, a plurality of mounting holes are set on the outer wall of mounting plate 3, the bottom of shell 1 is provided with air inlet, the top of air inlet is provided with passageway, the bottom of passageway is provided with gas outlet and extends to the outside of shell 1;

[0033] Alarm assembly is installed on gas outlet passageway, alarm assembly extends to the outside of shell 1;

[0034] The top of shell 1 is installed with motor 4, the output shaft of motor 4 penetrates and extends to the inside of passageway, the output shaft outer wall of motor 4 is installed with fan blade 10;

[0035] Conical filter screen 8 for filtering gas is installed on the bottom inner wall of passageway, air inlet is provided with cone;

[0036] The output shaft of motor 4 penetrates conical filter screen 8, the bottom end of output shaft of motor 4 is installed with limit installation component 7, the outer wall of limit installation component 7 is installed with cylinder brush 9 for cleaning conical filter screen 8;

[0037] The purpose of the above setting is that when gas leakage exists, gas enters from the conical air inlet at the bottom of shell 1, since air inlet is conical, this shape helps to guide gas to enter passageway smoothly, plays the role of gathering airflow to some extent, thereby guiding leaked gas to alarm assembly quickly, improves the reaction rate of detection, and discovers gas leakage in time;

[0038] After entering passageway, gas will be filtered first by conical filter screen 8, conical filter screen 8 can increase filtering area, improve filtering efficiency, it can block impurities in gas, so that pure gas continues to flow in passageway, thereby improving the accuracy of gas detection;

[0039] The rotation of the fan blade 10 will cause the gas in the channel to flow, pushing the filtered gas towards the air outlet, and finally the gas is discharged from the air outlet to the outside of the shell 1. When the motor 4 rotates, the roller brush 9 will rotate with the output shaft of the motor 4. Since the roller brush 9 is located near the conical filter screen 8, its rotation can clean the conical filter screen 8 and prevent impurities from accumulating on the filter screen to affect the filtering effect;

[0040] When there is a gas leak, the alarm component can detect this abnormal situation and issue an alarm signal so that the operator can discover and handle the problem in time. Through the mounting holes on the mounting ring 2 and the mounting plate 3, the entire device can be firmly installed in the designated position.

[0041] The alarm component includes a buzzer 5 installed on the inner wall of the air outlet channel. The buzzer 5 is installed with a detector near one end of the channel interior, and the other end of the buzzer 5 is installed with an indicator light 6.

[0042] The purpose of the above arrangement is that when there is a gas leak, the detector will trigger the buzzer 5 to emit an alarm sound when it detects that the parameters exceed the normal range. The indicator light 6 at the other end of the buzzer 5 will also light up at the same time, reminding the operator through a visual signal. This sound and light combined alarm method can more effectively attract the attention of the operator, so that he can know the abnormal state of the gas in the air outlet channel in time.

[0043] The top of the conical filter screen 8 is installed with a plurality of scrapers 11, which are close to the inner wall of the channel.

[0044] The purpose of the above arrangement is that when the gas passes through the channel, the impurities in the gas adhere to the inner wall of the channel, and the scraper 11 is used to clean the inner wall of the channel.

[0045] The outer wall of the scraper 11 is provided with a scraping groove for storing impurities.

[0046] The bottom port of the shell 1 is provided with a slot, and the conical filter screen 8 is fixedly connected with a leaf spring 801 at both ends. The conical filter screen 8 is installed on the inner wall of the slot through the leaf spring 801.

[0047] The purpose of the above arrangement is that the elasticity of the leaf spring 801 can keep the conical filter screen 8 in a stable installation state in the slot. At the same time, when subjected to a certain external force, the leaf spring 801 can play a buffering and resetting role to ensure the normal work of the conical filter screen 8.

[0048] The limiting installation assembly 7 comprises a connecting block 704 arranged below the output shaft of the motor 4, the inside of the connecting block 704 is slidably connected with two movable rods 701, a plurality of springs 702 are connected between the two movable rods 701, the top of the two movable rods 701 is fixedly connected with a limiting block 703 which is located outside the top of the connecting block 704, the movable rods 701 extend into the inside of the output shaft of the motor 4, the bottom of the output shaft of the motor 4 is provided with a limiting hole 401, and the limiting block 703 is limitedly matched with the limiting hole 401;

[0049] The purpose of the above arrangement is that when the limiting installation assembly 7 needs to be installed, the movable rods 701 are butt-jointed with the inside of the output shaft of the motor 4, the limiting block 703 is limitedly matched with the limiting hole 401, so that the connecting block 704 and the output shaft of the motor 4 are firmly connected together, and the plurality of springs 702 play a resetting role, so that the roller brush 9 can stably rotate with the output shaft of the motor 4 and effectively clean the conical filter screen 8.

[0050] Working principle: when there is gas leakage, the gas enters from the conical gas inlet at the bottom of the shell 1, and due to the conical shape of the gas inlet, this shape helps to guide the gas to smoothly enter the channel and plays a role of converging the gas flow, so as to quickly guide the leaked gas to the detector, when there is gas leakage, when the detector detects that these parameters are out of the normal range, the buzzer 5 will trigger an alarm sound, and the indicator light 6 at the other end of the buzzer 5 will also light up at the same time, and the visual signal can remind the operator, and the sound and light combined alarm mode can more effectively attract the attention of the operator, so that he can know the abnormal state of the gas in the gas outlet channel in time, improve the reaction rate of detection, and discover gas leakage in time;

[0051] The gas entering the channel will first pass through the conical filter screen 8 for filtering, the conical filter screen 8 can increase the filtering area and improve the filtering efficiency, it can block impurities in the gas, so that the pure gas continues to flow in the channel, thereby improving the accuracy of gas detection;

[0052] The rotation of the fan blade 10 will promote the flow of the gas in the channel, push the filtered gas to the direction of the gas outlet hole, and finally the gas is discharged to the outside of the shell 1 from the gas outlet hole, when the motor 4 rotates, the roller brush 9 will rotate with the output shaft of the motor 4, and since the roller brush 9 is located near the conical filter screen 8, its rotation can clean the conical filter screen 8, preventing too much impurities from accumulating on the filter screen and affecting the filtering effect;

[0053] When the limiting installation assembly 7 needs to be installed, the movable rod 701 is butted inside the motor 4 output shaft, the limiting block 703 is limitedly matched with the limiting hole 401, the connecting block 704 is firmly connected with the motor 4 output shaft, the spring 702 plays a reset role, the roller brush 9 can stably rotate with the motor 4 output shaft, the conical filter screen 8 is effectively cleaned, the two movable rods 701 are pressed, the limiting block 703 is released from the limiting cooperation with the limiting hole 401, the roller brush 9 can be quickly disassembled for maintenance, the conical filter screen 8 is taken out from the slot, then the conical filter screen 8 is rotated, the scraper 11 is driven to rotate, the scraper 11 is used for cleaning the inner wall of the channel, the outer wall of the scraper 11 is provided with a scraping groove, impurities are stored in the scraping groove, so that the channel is maintained conveniently.

[0054] The preferred embodiments disclosed above are only used for helping to describe the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific implementation modes. Apparently, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalent thereof.

Claims

1. A leakage alarm device for gas, comprising a shell (1), a mounting ring (2) is fixedly connected to the outer wall of the shell (1), one end of the mounting ring (2) is inserted with a mounting plate (3), a plurality of mounting holes are formed in the outer wall of the mounting plate (3), characterized in that: The bottom of the shell (1) is provided with an air inlet, and the top of the air inlet is provided with a channel, and the bottom of the channel is provided with an air outlet and extends to the outside of the shell (1); An alarm assembly is installed on the air outlet channel, and the alarm assembly extends to the outside of the shell (1); A motor (4) is installed on the top of the shell (1), the output shaft of the motor (4) penetrates and extends to the inside of the channel, and a fan blade (10) is installed on the outer wall of the output shaft of the motor (4); A conical filter screen (8) for filtering gas is installed on the inner wall of the bottom of the channel, and the air inlet is provided with a cone; The output shaft of the motor (4) penetrates the conical filter screen (8), and a limiting mounting assembly (7) is installed at the bottom end of the output shaft of the motor (4), and a roller brush (9) for cleaning the conical filter screen (8) is installed on the outer wall of the limiting mounting assembly (7).

2. A gas leak alarm device as claimed in claim 1, wherein: The alarm assembly includes a buzzer (5) installed on the inner wall of the air outlet channel, a detector is installed near one end of the buzzer (5) inside the channel, and an indicator light (6) is installed at the other end of the buzzer (5).

3. A gas leakage alarm device as claimed in claim 1, wherein: A plurality of scrapers (11) are installed on the top of the conical filter screen (8), and the scrapers (11) are close to the inner wall of the channel.

4. A gas leak alarm device as claimed in claim 3, wherein: A scraping groove is arranged on the outer wall of the scraper (11).

5. A gas leakage alarm device as claimed in claim 1, wherein: A slot is arranged on the bottom port of the shell (1), and the conical filter screen (8) is fixedly connected with a leaf spring (801) at both ends, and the conical filter screen (8) is installed on the inner wall of the slot through the leaf spring (801).

6. A gas leakage alarm device as claimed in claim 1, wherein: The limiting mounting assembly (7) includes a connecting block (704) arranged below the output shaft of the motor (4), two movable rods (701) slidably connected in the connecting block (704), a plurality of springs (702) connected between the two movable rods (701), a limiting block (703) fixedly connected at the top of the two movable rods (701), the limiting block (703) being located on the top outside of the connecting block (704), the movable rods (701) extending to the inside of the output shaft of the motor (4), a limiting hole (401) being arranged at the bottom of the output shaft of the motor (4), and the limiting block (703) and the limiting hole (401) are in limiting cooperation.

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