Combustible gas alarm calibration device

Abstract

The utility model discloses a combustible gas alarm calibration device, relates to the fire safety equipment technology field, and comprises a photometer and a photosensor, the top end of the photometer is fixedly connected with a mounting plate, the bottom surface of the mounting plate is provided with an outer cover, the photosensor is installed on the inner wall surface of the outer cover, the two sides of the outer cover are provided with openings, and the openings are communicated with the mounting plate. The handle is held by a hand to drive the rotating disc to rotate, the rotating disc drives the clamping strip to move through the straight groove, the clamping strip drives the sealing plate to move, meanwhile, the sealing plate is limited by the fixing sleeve through the positioning column, and therefore the sealing plate can be fixed to the fixing sleeve through the positioning column. The positions of the sealing plates are adjusted through the double limiting effects of the rotating disc and the fixing sleeve, the size of a through hole formed by the multiple sealing plates is changed, the size of a through opening for smoke entering is adjusted through error feedback of an original alarm device, and the effect of calibrating the alarm is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire safety equipment, in particular to a calibrating device for a combustible gas alarm. Background Art

[0002] Flue gas analyzer is a tool used to measure and analyze the components of flue gas. It includes the method of using light illumination to detect gas concentration. The specific principle is that the infrared light emitted by the infrared light source enters the measuring gas chamber after being modulated by the light cutter. When the infrared light passes through the measured gas, these gases absorb infrared light of a specific wavelength, and the gas concentration can be measured by the attenuation of the infrared light.

[0003] For example, the "A Combustible Gas Alarm Calibration Device" with patent publication number CN219842735U includes a calibration tank, the upper surface of the calibration tank is detachably connected to the lower surface of the sealed tank cover, the inner wall of the calibration tank is respectively fixed to the outer surfaces of the placement plate and the partition, the upper surface of the placement plate is provided with a fixing component, the lower surface of the partition is fitted with the upper surface of the gas storage tank, and the gas storage tank is installed on the lower surface of the inner wall of the calibration tank.

[0004] However, in the prior art, when light is used to measure smoke concentration and sound an alarm, many factors will affect the detection accuracy of the alarm. For example, the smoke content entering the alarm will be different depending on the location of the alarm. Setting the alarm at different locations may also cause warning deviations, causing the alarm to be easily affected by changes in the actual use environment. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that the threshold value of the alarm concentration is easily affected by changes in the actual use environment, and proposes a calibrating device for a combustible gas alarm.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a combustible gas alarm calibration device, including a photoradiometer and a photosensor, the top of the photoradiometer is fixedly connected to a mounting plate, the bottom surface of the mounting plate is installed with an outer cover, the photosensor is installed on the inner wall surface of the outer cover, openings are provided on both sides of the outer cover, and fixed sleeves are installed at the opening positions, the surface of the fixed sleeve is provided with arc grooves at equal intervals, the inner side wall of the arc groove is slidably connected with a positioning column, one end of the positioning column is fixedly connected to a sealing plate, the other side of the sealing plate is fixedly connected with a clamping strip, the outer side wall of the fixed sleeve is rotatably connected with a rotating disk, the inner side wall of the rotating disk is provided with straight grooves at equal intervals, and the straight grooves are slidably connected to the clamping strip.

[0007] Preferably, threaded holes are provided at four corners of the surface of the mounting plate.

[0008] Preferably, a positioning ring is fixedly connected to the bottom surface of the mounting plate, and the inner ring of the positioning ring is provided with avoidance openings at equal intervals.

[0009] Preferably, the outer side wall of the outer cover is fixedly connected with a clamping block, and the inner side wall of the clamping block is rotatably connected with a retaining ring.

[0010] Preferably, a handle is fixedly connected to the outer side wall of the rotating disk.

[0011] Preferably, the outer surface of the outer cover is coated with a light-shielding coating.

[0012] Preferably, the inner wall of the positioning ring is coated with lubricant.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, the rotating disk is driven to rotate by holding the handle, and the rotating disk drives the clamping strip to move through the straight groove, and the clamping strip drives the sealing plate to move. At the same time, the sealing plate is also limited by the fixing sleeve through the positioning column. The dual limiting effect of the rotating disk and the fixing sleeve is utilized to adjust the position of the sealing plate, so that the size of the through hole composed of multiple sealing plates is changed. The error feedback of the original alarm device is utilized to adjust the size of the opening for smoke to enter, thereby achieving the effect of calibrating the alarm.

[0015] 2. In the utility model, by setting a positioning ring on the outer side of the mounting plate, the outer cover can be inserted between the positioning rings, and after the outer cover is rotated at a certain angle, the clamping block and the avoidance opening are offset from each other, so that the outer cover is fixed under the mounting plate. When disassembling the internal components, the outer cover is rotated in the opposite direction so that the clamping block and the avoidance opening are aligned again, and the outer cover can be removed from the mounting plate, thereby achieving the effect of portable disassembly of the outer cover and facilitating the replacement of internal parts of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of a combustible gas alarm calibration device is proposed for the utility model;

[0017] Figure 2 A schematic diagram of the structural disassembly of a combustible gas alarm calibration device is proposed for the utility model;

[0018] Figure 3 A side structural cross-sectional view of a combustible gas alarm calibration device is proposed for the utility model;

[0019] Figure 4 The utility model proposes a structural splitting method of a rotating disk and a fixed sleeve in a combustible gas alarm calibration device. Figure 1 ;

[0020] Figure 5The utility model proposes a structural splitting method of a rotating disk and a fixed sleeve in a combustible gas alarm calibration device. Figure 2 .

[0021] Legend: 1. Mounting plate; 2. Positioning ring; 3. Outer cover; 4. Rotating disk; 5. Fixing sleeve; 6. Avoidance; 7. Photometer; 8. Block; 9. Closing plate; 10. Photosensor; 11. Handle; 12. Positioning column; 13. Arc groove; 14. Straight groove; 15. Cardan. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure. Example

[0024] like Figure 1-5 As shown, the utility model provides a calibration device for a combustible gas alarm, including a radiometer 7 and a photosensor 10, the top of the radiometer 7 is fixedly connected to a mounting plate 1, the bottom surface of the mounting plate 1 is installed with an outer cover 3, the photosensor 10 is installed on the inner wall surface of the outer cover 3, openings are provided on both sides of the outer cover 3, and fixed sleeves 5 are installed at the opening positions, the surface of the fixed sleeve 5 is provided with arc grooves 13 at equal intervals, the inner side wall of the arc groove 13 is slidably connected with a positioning column 12, one end of the positioning column 12 is fixedly connected to a sealing plate 9, the other side of the sealing plate 9 is fixedly connected with a clamping strip 15, the outer side wall of the fixed sleeve 5 is rotatably connected to a rotating disk 4, the inner side wall of the rotating disk 4 is provided with straight grooves 14 at equal intervals, and the straight grooves 14 are slidably connected to the clamping strip 15.

[0025] The following is a detailed description of the specific configuration and function of this embodiment. First, the working principle of the alarm is introduced. The concentration of smoke as a medium has a certain influence on the projection of light. When the concentration of smoke exceeds the standard, the searchlight emitted by the light transmitter 7 is damaged in the process of smoke transmission, which causes the concentration of the searchlight received by the photosensitive instrument 10 to fail to meet the standard, and finally the device alarm of the alarm is set off.

[0026] When the alarm triggering condition deviates, the smoke content entering the outer cover 3 can be adjusted according to the original alarm deviation result feedback. When the smoke concentration of the alarm triggering condition is too high, the channel size of the fixed sleeve 5 can be reduced, so that the air entering the outer cover 3 from the outside air is reduced, making it more difficult for the alarm to trigger the alarm. Conversely, when the smoke concentration of the alarm triggering condition is too low, the channel size of the fixed sleeve 5 can be increased, so that more air enters the outer cover 3 from the outside air, making it easier for the alarm to trigger the alarm.

[0027] The fixed sleeve 5 is composed of a plurality of sealing plates 9, forming a structure with an adjustable middle through hole, so as to adjust the concentration of smoke entering the outer cover 3 from the outside. The rotating disk 4 is rotated by holding the handle 11, thereby changing the docking angle between the rotating disk 4 and the fixed sleeve 5. The sealing plate 9 is limited by the fixed sleeve 5 through the positioning column 12. At the same time, the sealing plate 9 is also limited by the rotating disk 4 through the clamping strip 15. Adjusting the docking angle between the rotating disk 4 and the fixed sleeve 5 will change the retracted position of the sealing plate 9, thereby adjusting the size of the through hole. Example

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, threaded holes are provided at the four corners of the surface of the mounting plate 1. A positioning ring 2 is fixedly connected to the bottom surface of the mounting plate 1, and the inner ring of the positioning ring 2 is provided with avoidance openings 6 at equal intervals. A clamping block 8 is fixedly connected to the outer wall of the outer cover 3, and a retaining ring is rotatably connected to the inner wall of the clamping block 8. A handle 11 is fixedly connected to the outer wall of the rotating disk 4. The outer surface of the outer cover 3 is coated with a light-shielding coating. The inner wall of the positioning ring 2 is coated with a lubricant.

[0029] The effect achieved by the entire embodiment is that in order to avoid the influence of external environmental light on the alarm of the photosensor 10, black glue or other light-isolating materials are applied to the outer wall of the outer cover 3, so that the photosensor 10 is minimally disturbed by the outside world. In order to facilitate the rapid replacement of internal parts, a positioning ring 2 is set on the outer side of the mounting plate 1, and the outer cover 3 can be inserted between the positioning rings 2, and after the outer cover 3 is rotated a certain angle, the block 8 and the avoidance opening 6 are offset from each other, so that the outer cover 3 is fixed under the mounting plate 1. When disassembling the internal components, the outer cover 3 is rotated in the opposite direction to align the block 8 with the avoidance opening 6 again, and the outer cover 3 can be removed from the mounting plate 1.

[0030] The use method and working principle of the device: the searchlight emitted by the radiometer 7 is received by the photosensitive instrument 10, and the concentration of the combustible gas in the air is judged according to the radiation intensity of the light received by the photosensitive instrument 10, and an alarm is triggered when the threshold is reached;

[0031] When calibrating the alarm, if the smoke concentration that triggers the alarm is too high, hold the handle 11 to rotate the rotating disk 4, change the docking angle between the rotating disk 4 and the fixed sleeve 5, and adjust the opening to become smaller, so that the air entering the outer cover 3 from the outside air is reduced, making it more difficult for the alarm to trigger the alarm;

[0032] On the contrary, if the smoke concentration that triggers the alarm is too low, the handle 11 is held to rotate the rotating disk 4 in the opposite direction, changing the docking angle between the rotating disk 4 and the fixed sleeve 5, thereby adjusting the opening to become larger, so that more air enters the outer cover 3 from the outside air, making it easier for the alarm to be triggered.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A combustible gas alarm calibration device, comprising a radiometer (7) and a photosensor (10), characterized in that: The top of the radiometer (7) is fixedly connected to a mounting plate (1), the bottom surface of the mounting plate (1) is installed with an outer cover (3), the photosensor (10) is installed on the inner wall surface of the outer cover (3), both sides of the outer cover (3) are provided with openings, and fixed sleeves (5) are installed at the opening positions, the surface of the fixed sleeve (5) is provided with arc grooves (13) at equal intervals, the inner side wall of the arc groove (13) is slidably connected with a positioning column (12), one end of the positioning column (12) is fixedly connected to a sealing plate (9), and the other side of the sealing plate (9) is fixedly connected with a clamping strip (15), the outer side wall of the fixed sleeve (5) is rotatably connected with a rotating disk (4), the inner side wall of the rotating disk (4) is provided with straight grooves (14) at equal intervals, and the straight grooves (14) are slidably connected to the clamping strip (15).

2. A combustible gas alarm calibration device according to claim 1, characterized in that: Threaded holes are provided at four corners of the surface of the mounting plate (1).

3. A combustible gas alarm calibration device according to claim 1, characterized in that: A positioning ring (2) is fixedly connected to the bottom surface of the mounting plate (1), and the inner ring of the positioning ring (2) is provided with avoidance openings (6) at equal intervals.

4. A combustible gas alarm calibration device according to claim 1, characterized in that: The outer side wall of the outer cover (3) is fixedly connected to a clamping block (8), and the inner side wall of the clamping block (8) is rotatably connected to a retaining ring.

5. The combustible gas alarm calibration device according to claim 1, characterized in that: A handle (11) is fixedly connected to the outer side wall of the rotating disk (4).

6. A combustible gas alarm calibration device according to claim 1, characterized in that: The outer surface of the outer cover (3) is coated with a light-shielding coating.

7. A combustible gas alarm calibration device according to claim 3, characterized in that: The inner wall of the positioning ring (2) is coated with lubricant.

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