Gas alarm calibration device
By designing a calibration device with conical seals and fixing mechanisms suitable for different types of gas alarms, the problem of poor adaptability of existing devices is solved, and efficient and safe gas alarm calibration is achieved.
Patent Information
- Application Number
- CN202422139335.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-02
AI Technical Summary
Existing gas alarm calibration devices can only adapt to a single fixed model and cannot adapt to different models of gas alarms, resulting in a cumbersome calibration process.
A calibration device is designed, which includes a conical seal and a fixing mechanism. The seal is made of rubber or silicone and can adapt to detection heads of different diameters. It is fixed by threaded connection and top screw to achieve the adaptation of multiple models of gas alarms.
It improves the calibration efficiency, avoids the frequent replacement of calibration devices, ensures that gas does not leak, prevents gas pollution, and improves the convenience and safety of the calibration process.
Smart Images
Figure CN223486584U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gas alarm technology, and in particular relates to a gas alarm calibration device. Background Technology
[0002] A gas alarm is a warning device that emits audible and visual alarm signals when the concentration of flammable gas reaches a preset alarm value, prompting the implementation of safety measures such as personnel evacuation, forced ventilation, and equipment shutdown. To ensure the safety of personnel and equipment, gas alarms require regular calibration and maintenance. Calibration involves connecting a calibration chamber to the gas alarm's detection head, introducing a standard gas of a certain concentration into the chamber, and then displaying the corresponding concentration in the alarm. The displayed concentration is compared to the introduced concentration to determine whether the gas alarm is up to standard.
[0003] Most existing calibration covers are specially designed for the production of gas alarms and can only be used with a fixed model of gas alarm. However, different models have different detection head diameters, so they cannot be used with other models, making the calibration of different models of gas alarms quite cumbersome. Utility Model Content
[0004] The purpose of this invention is to provide a gas alarm calibration device to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A gas alarm calibration device includes: a main body and a sealing element disposed inside the main body;
[0007] The main body includes an upper shell and a lower shell. The upper shell is tapered, wider at the top and narrower at the bottom. It has a fixing mechanism at the top and the sealing element inside. The bottom inner side has a step. The sealing element is located below the fixing mechanism, and its bottom contacts the upper surface of the step. The sealing element is tapered and adapted to the upper shell. The bottom of the lower shell is connected to an air intake pipe.
[0008] As a further improvement of this utility model, the sealing element is made of rubber or silicone.
[0009] As a further improvement of this utility model, the fixing mechanism includes at least two screw holes provided on the upper part of the upper housing, and a set screw extending through the screw holes toward the center of the upper housing.
[0010] As a further improvement of this utility model, the bottom of the lower housing is provided with an internal threaded hole communicating with its interior, and the air intake pipe is provided with an external thread that matches the internal threaded hole, and the air intake pipe is threadedly connected to the lower housing.
[0011] As a further improvement of this utility model, the upper housing is also provided with two air channels, the upper ports of which are connected to the outside, and the lower ports of which are connected to the interior of the lower housing.
[0012] As a further improvement of this utility model, a plug is detachably connected to the upper port of the air passage.
[0013] As a further improvement of this utility model, a sealing cap is provided at the bottom of the air intake pipe.
[0014] The beneficial effects of adopting the above technical solution are as follows:
[0015] This invention features a conical sealing element that can accommodate detection heads of different diameters. A fixing mechanism secures the gas alarm, making it adaptable to various gas alarm models. This eliminates the need for frequent changes to the calibration device when calibrating multiple models, thus improving calibration efficiency. The sealing element is made of rubber or silicone, providing excellent sealing performance and preventing gas from leaking out from the connection between the detection head and the sealing element, thus avoiding gas contamination. Attached Figure Description
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0017] Figure 2 This is a main sectional view of the present invention;
[0018] Figure 3 for Figure 2 Enlarged view of point A;
[0019] Figure 4 This is a schematic diagram of another structure of the present utility model;
[0020] The markings in the diagram are as follows: 1. Main body, 2. Seal, 3. Upper housing, 4. Lower housing, 5. Step, 6. Inlet pipe, 7. Screw hole, 8. Set screw, 9. Air passage, 10. Plug, 11. Sealing cap. Detailed Implementation
[0021] To better understand the purpose, structure, and function of this utility model, a clear and complete description of this utility model will be provided below in conjunction with the accompanying drawings.
[0022] like Figures 1-4 The gas alarm calibration device shown includes: a main body 1 and a sealing element 2 disposed inside the main body 1; wherein, the sealing element 2 is used to contact the detection head of the gas alarm, and the sealing element 2 is made of rubber or silicone. During calibration, it has good sealing performance and can prevent the gas introduced from overflowing from the connection between the detection head and the sealing element 2, causing gas pollution.
[0023] Reference Figure 2 The main body 1 includes an upper shell 3 and a lower shell 4. The upper shell 3 is tapered, wider at the top and narrower at the bottom, with a fixing mechanism at the top and the sealing element 2 inside. A step 5 is located on the inner side of the bottom. The sealing element 2 is located below the fixing mechanism, with its bottom contacting the upper surface of the step 5, and its tapered shape is adapted to the upper shell 3. The bottom of the lower shell 4 is connected to an air inlet pipe 6. During calibration, the detection head of the gas alarm is first inserted downwards from above the upper shell 3 until it abuts against the sealing element 2. Then, the fixing mechanism is used to fix the gas alarm body. A certain concentration of gas is then introduced through the bottom of the air inlet pipe 6. The gas rises, passing through the interior of the lower shell 4 and the sealing element 2 before reaching the detection head, where the corresponding concentration is displayed on the gas alarm. Because the sealing element 2 is tapered, detection heads of different diameters can be inserted into it, and the fixing mechanism locks the gas alarm in place, thus adapting to different models of gas alarms. This eliminates the need for frequent changes to the calibration device when calibrating multiple models of gas alarms, improving calibration efficiency.
[0024] Step 5 limits the position of seal 2, allowing seal 2 to be detached from upper housing 3 for easy replacement when damaged. In this embodiment, the bottom of lower housing 4 has an internal threaded hole communicating with its interior, and the air intake pipe 6 has an external thread that matches the internal threaded hole. The air intake pipe 6 and lower housing 4 are threadedly connected through the matching internal threaded hole and external thread; that is, the air intake pipe 6 and lower housing 4 are detachably connected, facilitating replacement and easy disassembly and transport.
[0025] In one possible implementation, the fixing mechanism includes at least two screw holes 7 located on the upper part of the upper housing 3, and a set screw 8 extending through the screw holes 7 towards the center of the upper housing 3. After the detection head abuts against the seal 2, the set screw 8 is tightened until it abuts against the gas alarm body, thus securing the gas alarm. In this embodiment, two set screws 8 are symmetrically arranged. To prevent the end of the set screw 8 from damaging the outer surface of the gas alarm, a buffer pad is also provided at the end of the set screw 8. The buffer pad is made of rubber or silicone, which is not only flexible but also provides good static friction with the gas alarm.
[0026] Considering that the density of the introduced gas may be greater than that of air, the gas will flow downwards when introduced through the air inlet pipe 6, making calibration difficult; in this embodiment, the upper housing 3 is also provided with two air channels 9, the upper ports of which are connected to the outside, and the lower ports of which are connected to the interior of the lower housing 4; furthermore, the bottom of the air inlet pipe 6 is provided with a sealing cap 11, such as Figure 4As shown. When the density of the introduced gas is greater than that of air, the sealing cap 11 is placed on the bottom of the air inlet pipe 6. The sealing cap 11 and the air inlet pipe 6 can be fastened together or threaded together. Teflon tape can be placed at the connection to prevent air leakage. Then, gas is introduced into one of the air channels 9, forcing the original air inside out of the other air channel 9. The introduced gas is detected by the detection head. When the density of the introduced gas is less than that of air, to prevent air leakage from the air channel 9, a plug 10 can be detachably connected to the upper port of the air channel 9. The number of plugs 10 used to block the air channel 9 can be selected according to the needs of use.
[0027] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.
Claims
1. A gas alarm calibration device, characterized in that: It includes: The main body (1) and the sealing element (2) disposed inside the main body (1); The main body (1) includes an upper shell (3) and a lower shell (4). The upper shell (3) is tapered, wider at the top and narrower at the bottom. It has a fixing mechanism at the top and the sealing element (2) inside. It has a step (5) on the inner side of the bottom. The sealing element (2) is located below the fixing mechanism. Its bottom is in contact with the upper surface of the step (5). The sealing element (2) is tapered and adapted to the upper shell (3). The bottom of the lower shell (4) is connected to the air intake pipe (6).
2. The gas alarm calibration device according to claim 1, characterized in that: The sealing element (2) is made of rubber or silicone.
3. The gas alarm calibration device according to claim 1, characterized in that: The fixing mechanism includes at least two screw holes (7) provided on the upper part of the upper housing (3), and a set screw (8) extending through the screw holes (7) toward the center of the upper housing (3).
4. The gas alarm calibration device according to claim 1, characterized in that: The bottom of the lower housing (4) is provided with an internal threaded hole that communicates with its interior, and the air intake pipe (6) is provided with an external thread that matches the internal threaded hole. The air intake pipe (6) is threadedly connected to the lower housing (4).
5. A gas alarm calibration device according to claim 1, characterized in that: The upper housing (3) is also provided with two air channels (9), the upper ports of the two air channels (9) are connected to the outside, and the lower ports are connected to the inside of the lower housing (4).
6. A gas alarm calibration device according to claim 5, characterized in that: A plug (10) can be detachably connected to the upper port of the air passage (9).
7. A gas alarm calibration device according to claim 5, characterized in that: The bottom of the air intake pipe (6) is provided with a sealing cap (11).