Combustible gas detector calibration device

Abstract

The utility model discloses a verification device for a combustible gas detector, which comprises a gas storage vessel, a gas transmission hose, a telescopic rod, a hose fixing device, an audible and visual alarm, a small fan, a fan fixing frame and a wind removal pipeline, the device has the function of blowing away residual gas and dust in the verified detector in time after the test is finished, and the verified detector is prevented from being damaged. According to the utility model, the verified detector is effectively protected, high-risk environments such as high installation height of the detected detector, explosive verification places, electric shock and the like are overcome, and accurate verification of the combustible gas detector can be realized.

Description

Technical Field

[0001] The utility model relates to the field of combustible gas detection, in particular to a combustible gas detector calibration device. Background Art

[0002] Combustible gas refers to substances that can be ignited and are in gaseous state at normal temperature and pressure, such as hydrogen, acetylene, etc. Combustible gas has the general characteristics of gas. Combustible gas of one component is called single gas; a mixture of two or more combustible gases is called mixed combustible gas. Combustible gases are mixed in a corresponding combustion-supporting medium in a certain proportion. Under the action of an ignition source, they can cause combustion or explosion. The main purpose of a combustible gas detector is to detect combustible gases in the air to prevent the gas from causing harm to the human body or reaching a certain concentration and causing an explosion.

[0003] At present, the detection head of the combustible gas detector under test is easily affected by the environment and dust accumulates, causing damage to the probe. If the gas concentration is high during testing and the probe is accumulated for a long time, it will also cause damage to the probe. Secondly, the on-site working conditions are complex. The factory building has high and low floors. The low floor height is about 6 meters and the high floor height is about 7.5 meters. The combustible gas detector under test is generally installed on the roof. There are charged bodies within a certain range of the production equipment, which brings difficulties and safety risks to the detector testing. Utility Model Content

[0004] The utility model aims to provide a combustible gas detector verification device to solve the problems that the detection head of the combustible gas detector being tested is prone to dust accumulation, the probe of the detector being tested is easily damaged due to being exposed to high concentration of combustible gas for a long time during verification, and the verification environment has high risks.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A combustible gas detector calibration device includes a gas storage vessel 1, a gas hose 9, a telescopic rod 18, a hose fixing device, an audible and visual alarm 12, a small fan 14, a fan fixing frame 13, and an air removal duct 15. The audible and visual alarm 12 is installed at the end of the telescopic rod 18. The gas storage vessel 1 is arranged at one end of the telescopic rod 18 away from the audible and visual alarm 12. The gas storage vessel 1 is connected to the audible and visual alarm 12 through a gas pipeline formed by the gas hose 9. The gas hose 9 is fixed to the telescopic rod 18 through a hose fixing device. The small fan 14 is fixed to one end of the telescopic rod 18 provided with the audible and visual alarm through the fan fixing frame 13. There is an air removal duct 15 between the air outlet of the small fan 14 and the audible and visual alarm for generating a gas blowing audible and visual alarm. The audible and visual alarm is a standard part of a combustible gas probe.

[0007] Furthermore, the gas delivery hose 9 is connected to the gas storage vessel 1 through a three-way joint 20, the first joint 2 of the three-way joint 20 is connected to the gas storage vessel 1, the second joint 3 of the three-way joint 20 is connected to the plug 5, and the third joint 4 of the three-way joint 20 is connected to the gas delivery hose 9.

[0008] Furthermore, a filter screen 6 is provided at the connection between the third connector 4 and the gas delivery hose 9 .

[0009] Furthermore, one or more rotary valves 7 are arranged on the three-way connector 20 .

[0010] Furthermore, a low-pressure pressure gauge 8 is provided at one end of the gas delivery hose 9 close to the gas storage vessel 1 .

[0011] Furthermore, the gas delivery hose 9 is made of rubber.

[0012] Furthermore, the hose fixing device is one or more hose rings 11 arranged on the telescopic rod 18, and the hose rings 11 are buckle structures for providing support and guidance for the hose.

[0013] Furthermore, the telescopic rod 18 includes one or more connecting rods, and every two adjacent connecting rods are connected by a wedge-shaped fastening cover, the interior of the wedge-shaped fastening cover is a front thread and a rear wedge structure, and the end of the connecting rod is a front wedge and a rear thread structure that are fastened and connected with the wedge-shaped fastening cover.

[0014] Furthermore, a fan switch 10 is provided at one end of the telescopic rod 18 away from the sound and light alarm 12 .

[0015] The advantages of the utility model are:

[0016] By setting a needle-type precision regulating valve and using a three-way structure to connect with a gas storage vessel, different standard gases can be filled for replacement, which has certain practicality.

[0017] By setting up a small fan and wind removal channel to blow away residual gas and dust from the detector under test, the detector under test is effectively protected.

[0018] The telescopic rod with wedge-shaped fastening cover ensures the stable structure of the equipment and fully adapts to complex working conditions at different heights and in narrow spaces.

[0019] By using a low-pressure pressure gauge in conjunction with a rotary valve, the gas flow rate can be effectively controlled while verifying the sealing performance of the gas storage vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the combustible gas detector calibration device of the utility model;

[0021] Figure 2 This is an enlarged view of part A of the utility model;

[0022] Among them, 1-gas storage container, 2-first joint, 3-second joint, 4-third joint, 5-plug, 6-filter, 7-rotary valve, 8-low pressure gauge, 9-gas supply hose, 10-fan switch, 11-hose lifting ring, 12-sound and light alarm, 13-fan fixing bracket, 14-small fan, 15-air removal pipeline, 16-box assembly, 17-first wedge-shaped fastening cover, 18-telescopic rod, 19-second wedge-shaped fastening cover, 20-three-way joint. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Example 1

[0025] This embodiment discloses a combustible gas detector calibration device, please refer to Figure 1 , including a gas storage vessel 1, a gas hose 9, a telescopic rod 18, a hose fixing device, an audible and visual alarm 12, a small fan 14, a fan fixing frame 13, and a wind removal pipe 15. The audible and visual alarm 12 is installed at the end of the telescopic rod 18. The audible and visual alarm is a standard part of a combustible gas probe. The gas storage vessel 1 is arranged at one end of the telescopic rod 18 away from the audible and visual alarm 12. The gas storage vessel 1 is connected to the audible and visual alarm 12 through a gas pipeline formed by the gas hose 9. The gas hose 9 is fixed on the telescopic rod 18 through a hose fixing device. The hose fixing device is one or more hose rings 11 arranged on the telescopic rod 18. The hose ring 11 is a buckle structure used to provide hose support and guidance. The gas hose 9 is made of rubber and has communication, sealing and explosion-proof functions.

[0026] The telescopic rod 18 includes three connecting rods, and each two adjacent connecting rods are connected by a first wedge-shaped fastening cover 17 and a second wedge-shaped fastening cover 19. The wedge-shaped fastening cover has a front thread and a rear wedge structure inside, and the end of the connecting rod has a front wedge and a rear thread structure that are fastened to the wedge-shaped fastening cover. The telescopic rod can adjust the distance according to different environments such as the location and height of the on-site detector, and can quickly and easily achieve accurate testing.

[0027] The small fan 14 is fixed to one end of the telescopic rod 18 with the sound and light alarm through the fan fixing frame 13. There is a wind pipe 15 between the air outlet of the small fan 14 and the sound and light alarm, which is used to generate gas to blow the sound and light alarm. The small fan is a low-voltage DC low-power fan, which has the function of blowing away the residual gas and dust in the detector to be tested in time after the test is completed to prevent damage to the detector to be tested. The telescopic rod 18 is provided with a fan switch 10 at the end away from the sound and light alarm 12, and the small fan is powered by a low-voltage dry battery.

[0028] The gas delivery hose 9 is connected to the gas storage vessel 1 through the three-way joint 20, the first joint 2 of the three-way joint 20 is connected to the gas storage vessel 1, the second joint 3 of the three-way joint 20 is connected to the plug 5, and the third joint 4 of the three-way joint 20 is connected to the gas delivery hose 9. Through the three-way joint 20, different standard gases can be replaced, and the detection of different gases can be realized.

[0029] One or more rotary valves 7 are arranged on the three-way connector 20, and a low-pressure pressure gauge 8 is also arranged at one end of the gas supply hose 9 near the gas storage vessel 1. The rotary valve is a needle-type precision gas regulating valve for controlling the gas flow rate, and cooperates with the low-pressure pressure gauge 8 to realize the operation of connecting the gas pipeline between the gas storage vessel and the test probe and has the function of controlling the gas flow rate.

[0030] Example 2

[0031] A filter screen 6 is also provided at the connection between the third joint 4 and the gas delivery hose 9 to filter dust when the gas passes through, thereby protecting the probe. The third joint 4, the plug 5, the filter screen 6, the rotary valve 7, and the low-pressure pressure gauge 8 can all be placed in the box assembly 16.

[0032] Example 3

[0033] The device based on embodiment 1 or 2 has the following working process:

[0034] First, check that the rotary valve is in the closed state, connect the gas storage vessel 1 to the root of the first joint 2 of the three-way interface 20, and plug the second joint 3 with the plug 5 to prevent external gas from entering. Install the telescopic rod 18 and the wedge-shaped fastening cover according to the environmental height, release the gas hose 9 in the hose ring 11, slowly open the rotary valve 7, check the data displayed on the low-pressure pressure gauge 8, and adjust the rotary valve 7 after the data stabilizes to check whether the self-test alarm of the top standard sound and light alarm 12 is normal. Close the rotary valve 7, place the hose outlet close to the combustible gas detector under test, slowly open the rotary valve 7, check the data displayed on the low-pressure pressure gauge 8, and adjust the rotary valve 7 to control the flow rate after the data stabilizes, and check the alarm of the tested detector and compare it with the standard sound and light alarm 12 for verification.

[0035] After the test is completed, close the rotary valve 7, use the fan switch 10 to start the small fan 14 to blow out the tested detector through the air removal channel 15, and check whether the detector alarm returns to normal.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A combustible gas detector calibration device, characterized in that: The invention comprises a gas storage vessel (1), a gas delivery hose (9), a telescopic rod (18), a hose fixing device, an audible and visual alarm (12), a small fan (14), a fan fixing frame (13), and a wind removal pipeline (15). The audible and visual alarm (12) is mounted on the end of the telescopic rod (18). The gas storage vessel (1) is arranged on one end of the telescopic rod (18) away from the audible and visual alarm (12). The gas storage vessel (1) is connected to the audible and visual alarm (12) through a gas pipeline formed by a gas delivery hose (9). The gas delivery hose (9) is fixed to the telescopic rod (18) through a hose fixing device. The small fan (14) is fixed to one end of the telescopic rod (18) provided with the audible and visual alarm through the fan fixing frame (13). A wind removal pipeline (15) is provided between the air outlet of the small fan (14) and the audible and visual alarm for generating a gas blowing audible and visual alarm. The audible and visual alarm is a standard part of a combustible gas probe.

2. The combustible gas detector calibration device according to claim 1, characterized in that: The gas delivery hose (9) is connected to the gas storage container (1) via a three-way joint (20); a first joint (2) of the three-way joint (20) is connected to the gas storage container (1); a second joint (3) of the three-way joint (20) is connected to a plug (5); and a third joint (4) of the three-way joint (20) is connected to the gas delivery hose (9).

3. The combustible gas detector calibration device according to claim 2, characterized in that: A filter screen (6) is also provided at the connection between the third joint (4) and the gas delivery hose (9).

4. The combustible gas detector calibration device according to claim 2, characterized in that: One or more rotary valves (7) are arranged on the three-way connector (20).

5. The combustible gas detector calibration device according to claim 1, characterized in that: A low-pressure gauge (8) is also provided at one end of the gas delivery hose (9) close to the gas storage container (1).

6. The combustible gas detector calibration device according to claim 1, characterized in that: The gas delivery hose (9) is made of rubber.

7. The combustible gas detector calibration device according to claim 1, characterized in that: The hose fixing device is one or more hose hanging rings (11) arranged on the telescopic rod (18); the hose hanging rings (11) are buckle structures used to provide support and guidance for the hose.

8. The combustible gas detector calibration device according to claim 1, characterized in that: The telescopic rod (18) comprises one or more connecting rods, and every two adjacent connecting rods are connected by a wedge-shaped fastening cover, the interior of the wedge-shaped fastening cover is a front thread and a rear wedge-shaped structure, and the end of the connecting rod is a front wedge and a rear thread structure that are fastened and connected with the wedge-shaped fastening cover.

9. The combustible gas detector calibration device according to claim 1, characterized in that: The telescopic rod (18) is provided with a fan switch (10) at one end away from the sound and light alarm (12).

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