Natural gas leakage detection device for household gas cooker

Abstract

The utility model relates to a natural gas leakage detection device for a household gas cooker, which belongs to the technical field of natural gas leakage detection and comprises a shell, a gas sensor and a controller, the gas sensor and the controller are arranged in the shell, the controller is connected with an alarm, and a sampling pipe system is arranged on one side of the gas sensor. The sampling pipe system comprises a main pipe and a plurality of flexible branch pipes communicated with the main pipe, on-off adjusting parts are arranged on the branch pipes, and an air pump is arranged on the main pipe. The branch pipes are arranged at the sampling points of the household gas cooker, after the gas pump is started, gas samples of the sampling points enter the branch pipes, the gas samples in the branch pipes are converged in the main pipe and flow to the gas sensor, when the gas sensor does not detect natural gas leakage, it is indicated that natural gas leakage does not exist at the detection points, and the gas leakage is avoided. Multiple detection points are detected at the same time, so that the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas leakage detection, and in particular relates to a natural gas leakage detection device for a household gas cooker. Background Art

[0002] A household gas stove is a common kitchen cooking device. Most existing household gas stoves use natural gas as fuel. It usually includes one or more burner heads for generating flames. Users can control the cooking temperature by adjusting the fire power. With the improvement of relevant quality inspection standards for household gas stoves, the popularity of household gas stoves is also increasing.

[0003] The natural gas leak detection device is used to detect the gas leakage of gas stoves. The national standard for combustible gas detectors GB 15322-2019 provides indicators such as the range and alarm setting value of household natural gas leak detection devices. In the process of detecting gas leaks in the prior art, the detection end of the detection device is placed close to different positions such as the gas inlet joint, the connection between the gas inlet main pipe and the branch pipe, and the gas inlet valve of the gas stove in turn, and the natural gas concentration is detected by the gas sensor inside the device. When the detection device measures that the natural gas concentration exceeds the threshold, an alarm is issued. Although the above-mentioned detection device can realize the natural gas leak detection of household gas stoves, multiple detection points need to be tested in batches during the detection process. During the detection process, for stoves without natural gas leakage, each detection point still needs to be tested separately, and the detection efficiency needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a natural gas leakage detection device for a household gas cooker in order to solve the above-mentioned problem.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A natural gas leak detection device for a household gas cooker comprises a housing, a gas sensor and a controller arranged inside the housing, and the controller is connected to an alarm, a sampling pipe system is arranged on one side of the gas sensor, and the sampling pipe system comprises a main pipe and a plurality of flexible branch pipes connected to the main pipe, the branch pipes are used to collect gas samples at different sampling points of the household gas cooker, and an on-off adjustment member is arranged on the branch pipes, and an air pump is arranged on the main pipe, and the gas outlet of the air pump is arranged toward the detection end of the gas sensor. In the process of detecting whether there is a natural gas leak in the household gas cooker, the detection personnel first open the upper cover of the household gas cooker, set the branch pipes at each sampling point of the household gas cooker, turn on the air pump of the sampling pipe system, so that the gas samples of each sampling point enter the branch pipe, and the gas samples in each branch pipe converge inside the main pipe and flow to the gas sensor. When the gas sensor detects a natural gas leak, the controller sounds an alarm through the alarm, and then the detection personnel close part of the branch pipes, so that a single branch is turned on, and a single sampling point is detected, and the detection personnel sequentially detect each sampling point separately to determine the natural gas leak location of the household gas cooker. When the gas sensor does not detect a natural gas leak, it means that there is no natural gas leak at each detection point, which can improve the detection efficiency.

[0007] As a further optimization solution of the utility model, the on-off adjustment member is a valve arranged between the branch pipe and the main pipe.

[0008] As a further optimization solution of the utility model, the on-off adjustment member is a sealing plug arranged at the air inlet of the branch pipe.

[0009] As a further optimization solution of the present utility model, the sampling pipe system further includes a positioning member arranged on the branch pipe, and the positioning member is used to fix the air inlet of the branch pipe on the sampling point of the household gas cooker.

[0010] As a further optimization solution of the utility model, the positioning member includes a positioning hoop sleeved on the branch pipe, and a suction cup arranged on the outside of the positioning hoop.

[0011] As a further optimization solution of the utility model, the positioning member also includes a mounting pipe fixedly arranged on the outside of the branch pipe, and the positioning hoop is rotatably connected to the mounting pipe.

[0012] As a further optimization solution of the utility model, the positioning member is a tape or a magnet arranged on the branch pipe.

[0013] As a further optimization solution of the utility model, an exhaust port is provided on the side wall of the shell.

[0014] As a further optimization solution of the utility model, a display connected to the controller is provided outside the shell.

[0015] The beneficial effects of the utility model are:

[0016] 1) The utility model sets a branch pipe at each sampling point of the household gas stove, and collects the gas samples of each branch pipe into the main pipe through the air pump. The gas sample flows through the gas sensor. If the gas sensor detects a natural gas leak, a single sampling point is tested. Otherwise, it means that the natural gas test of the stove is qualified. The sampling pipe system can complete the natural gas leakage detection of each detection point at the same time, thereby improving the detection efficiency;

[0017] 2) The utility model fixes the air inlet of the branch pipe by the positioning piece, which can prevent the sampling end from deviating from the sampling point during the sampling process of the sampling pipe system, thereby ensuring smooth natural gas detection. The positioning piece fixes the branch pipe by a positioning hoop with a suction cup, and the positioning hoop can rotate around the branch pipe, which can prevent the branch pipe from being subjected to excessive torque when positioning the branch pipe, thereby avoiding damage to the sampling pipe system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the shell of the utility model;

[0020] Figure 3 It is a schematic diagram of the positioning member structure of the utility model;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0022] In the figure: 1, shell; 2, gas sensor; 3, controller; 4, alarm; 5, sampling pipe system; 6, exhaust port; 7, display; 51, main pipe; 52, branch pipe; 53, air pump; 54, valve; 55, positioning piece; 551, positioning hoop; 552, suction cup; 553, installation pipe; S, household gas stove. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] First embodiment

[0025] like Figure 1 and Figure 2As shown, a natural gas leakage detection device for a household gas stove comprises a housing 1, a gas sensor 2 and a controller 3 arranged inside the housing 1, and the controller 3 is connected to an alarm 4, which is arranged outside the housing 1. The alarm 4 can be an audible and visual alarm or a buzzer, and a sampling pipe system 5 is arranged on one side of the gas sensor 2. Specifically, the sampling pipe system 5 comprises a main pipe 51 fixed inside the housing 1, and a plurality of flexible branch pipes 52 connected to the main pipe 51, and the branch pipes 52 are located outside the housing 1. The branch pipes 52 are used to collect gas samples at different sampling points of the household gas stove S, and the sampling points can be different positions such as the air inlet joint of the stove S, the connection between the air inlet main pipe and the branch pipe, and the air inlet valve, and the branch pipes 52 are provided with an on-off adjustment member, and the main pipe 51 is provided with an air pump 53, and the air outlet of the air pump 53 is arranged toward the detection end of the gas sensor 2.

[0026] In the process of detecting whether there is a natural gas leak in a household gas stove S, the detection personnel first open the upper cover of the household gas stove S, set a branch pipe 52 at each sampling point of the household gas stove S, and turn on the air pump 53 of the sampling pipe system 5, so that the gas samples at each sampling point enter the branch pipe 52, and the gas samples in each branch pipe 52 converge inside the main pipe 51 and flow to the gas sensor 2. When the gas sensor 2 detects a natural gas leak, the controller 3 sends an alarm through the alarm 4, and then the detection personnel closes part of the branch pipe 52, so that a single branch 52 is turned on, and a single sampling point is detected. The detection personnel sequentially detect each sampling point separately to determine the natural gas leakage location of the household gas stove S. When the gas sensor 2 does not detect a natural gas leak, it means that there is no natural gas leak at each detection point, which can improve the detection efficiency. In addition, if the number of branch pipes 52 is greater than the number of all sampling points, the redundant branch pipes can be closed during the simultaneous sampling process at multiple points.

[0027] The on-off regulating member is preferably a valve 54 disposed between the branch pipe 52 and the main pipe 51, and the conduction condition of the branch pipe 52 can be controlled by the valve 54. In addition, the on-off regulating member can also be a sealing plug disposed at the air inlet of the branch pipe 52, and the branch pipe 52 can be closed by disposing a sealing plug at the air inlet of the branch pipe 52.

[0028] Furthermore, an exhaust port 6 is provided on the side wall of the housing 1 to exhaust the gas sample and avoid mutual interference between gas samples of different batches. Figure 1As shown, a display 7 connected to the controller 3 is provided outside the housing 1. The display 7 is used to display the composition and concentration of the gas sample. The model of the controller is preferably STM32F103RET6, and the model of the gas sensor 2 is preferably TGS3870. The sensor can detect the methane and carbon monoxide content in the gas sample. In addition, the gas sensor 2 can also be a gas sensor that only detects methane. Since the gas samples of each branch pipe 52 intersect with each other during the simultaneous detection of multiple points, if there is a natural gas leak, there is a condition of gas sample dilution. At this time, the alarm function of the alarm 4 may not be triggered. The detection personnel can judge the leakage of natural gas by observing the display 7. In addition, the alarm threshold of the alarm 4 can also be lowered to detect the leakage of natural gas.

[0029] Second embodiment

[0030] like Figure 3 and Figure 4 As shown, the difference between this embodiment and the previous embodiment is that the sampling pipe system 5 further includes a positioning member 55 arranged on the branch pipe 52, and the positioning member 55 is used to fix the air inlet of the branch pipe 52 on the sampling point of the household gas cooker S. The positioning member 55 includes a positioning hoop 551 sleeved on the branch pipe 52, and a suction cup 552 arranged on the outside of the positioning hoop 551. Suction cups 552 are arranged on both sides of each positioning hoop 551, and the branch pipe 52 can be quickly positioned at the sampling point by the suction cups 552. In addition, the positioning member 55 also includes a mounting pipe 553 fixedly arranged on the outside of the branch pipe 52, and an annular groove is arranged on the outer wall of the mounting pipe 553. The positioning hoop 551 is rotatably arranged on the annular groove of the mounting pipe 553. Since the positioning hoop 551 can rotate around the branch pipe 52 at this time, it can avoid that the branch pipe 52 is subjected to excessive torque when positioning the branch pipe 52, and avoid damage to the sampling pipe system 5. After positioning the branch pipe 52, it can avoid that the sampling end of the sampling pipe system 5 deviates from the sampling point during the sampling process, thereby ensuring smooth natural gas detection. In addition, the positioning member 55 may also be a tape or a magnet disposed outside the air inlet of the branch pipe 52 .

[0031] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A natural gas leak detection device for a household gas cooker, comprising a housing (1) and a gas sensor (2) and a controller (3) arranged inside the housing (1), wherein the controller (3) is connected to an alarm (4), characterized in that: A sampling pipe system (5) is provided on one side of the gas sensor (2); The sampling pipe system (5) comprises a main pipe (51) and a plurality of flexible branch pipes (52) connected to the main pipe (51); the branch pipes (52) are used to collect gas samples from different sampling points of the household gas cooker, and an on-off adjustment member is provided on the branch pipes (52); an air pump (53) is provided on the main pipe (51), and an air outlet of the air pump (53) is arranged toward a detection end of the gas sensor (2).

2. The natural gas leakage detection device for household gas cookers according to claim 1, characterized in that: The on-off adjustment member is a valve (54) arranged between the branch pipe (52) and the main pipe (51).

3. The natural gas leakage detection device for household gas cookers according to claim 2, characterized in that: The on-off adjustment member is a sealing plug arranged at the air inlet of the branch pipe (52).

4. The natural gas leakage detection device for household gas cookers according to claim 1, characterized in that: The sampling pipe system (5) further comprises a positioning member (55) arranged on the branch pipe (52), wherein the positioning member (55) is used to fix the air inlet of the branch pipe (52) on the sampling point of the domestic gas cooker.

5. The natural gas leakage detection device for household gas cookers according to claim 4, characterized in that: The positioning member (55) comprises a positioning hoop (551) sleeved on the branch pipe (52), and a suction cup (552) arranged outside the positioning hoop (551).

6. The natural gas leakage detection device for household gas cookers according to claim 5, characterized in that: The positioning member (55) further comprises a mounting tube (553) fixedly arranged on the outside of the branch tube (52), and the positioning hoop (551) is rotatably connected to the mounting tube (553).

7. The natural gas leakage detection device for household gas cookers according to claim 4, characterized in that: The positioning member (55) is a tape or a magnet arranged on the branch pipe (52).

8. The natural gas leakage detection device for household gas cookers according to claim 1, characterized in that: An exhaust port (6) is provided on the side wall of the shell (1).

9. The natural gas leakage detection device for household gas cookers according to claim 1, characterized in that: A display (7) connected to the controller (3) is provided outside the housing (1).

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