Gas pipeline with automatic closing function

Abstract

The invention relates to a gas pipeline with an automatic closing function. The gas pipeline comprises an input pipeline, an output pipeline, a pressure detection device, a switch valve and a controller. The number of the output pipelines is multiple, and the multiple output pipelines communicate with the input pipeline. The switch valve is arranged in the input pipeline; the pressure detection device is arranged on the input pipeline and arranged at the rear end of the switch valve in the air inlet direction. The pressure detection devices are further arranged on the output pipelines, and the pressure detection devices are used for detecting the gas pressure value in each pipeline; the controller receives the pressure value detected by the pressure detection device on each pipeline, and when it is detected that the gas input pressure and the gas output pressure are different, the controller judges that the gas leakage condition exists in the current pipeline. At the moment, the controller controls the switch valve to be switched off, gas input is cut off, meanwhile, warning information is sent out through the warning indicator electrically connected with the controller, and people in a family are reminded in time.

Description

Technical Field

[0001] This application relates to the technical field of gas safety protection, and in particular to a gas pipeline with an automatic shut-off function. Background Technology

[0002] With the development of daily life and the improvement of people's safety awareness, people are paying more and more attention to the use of gas. Gas companies provide in-home gas supply pipelines to reduce the safety hazards associated with traditional bottled gas. The correct use of gas is related to the safety and health of every family member; to reduce gas explosion accidents, preventing gas leaks is of paramount importance.

[0003] Currently, to address gas leaks in homes, gas detectors are typically installed in areas where leaks might occur, commonly at various points along the gas hose. These detectors detect leaks and issue alarms, allowing residents to address them promptly.

[0004] Regarding the aforementioned technologies, since gas pipelines are usually installed in well-ventilated locations, the concentration of leaked gas will be diluted. Gas detectors cannot output alarm information based on the diluted gas in the first instance, resulting in significant safety hazards during gas use. Summary of the Invention

[0005] In order to reduce safety hazards during gas use, this application provides a gas pipeline with an automatic shut-off function.

[0006] This application provides a gas pipeline with an automatic shut-off function, which adopts the following technical solution.

[0007] A gas pipeline with an automatic shut-off function includes: An input pipe is provided for connecting to the gas pipeline into the house, and a switch valve is installed on the input pipe. The system includes multiple output pipes, each of which is connected to the input pipe. A pressure detection device is provided, which is installed in the input pipe and the output pipe. The pressure detection device includes a valve body, a blocking body, a slide rod, a support rod, a spring, and a pressure sensor. A gas pipeline is installed in the valve body. A blocking wall with an opening area that gradually increases along the gas inlet direction is installed in the gas pipeline. The support rod is installed in the gas pipeline. The slide rod slides through the support rod. The pressure sensor is installed on the side of the support rod near the gas inlet. The blocking body is installed between the blocking wall and the support rod. The spring abuts against the blocking body and the pressure sensor. The controller is electrically connected to the switching valve and the pressure sensor respectively. The controller receives the change in a first gas pressure value in the input pipeline and the change in a second gas pressure value in the output pipeline. The controller is configured to control the switching valve to close when it detects that the change in the first gas pressure value and the change in the second gas pressure value are different and the difference in value is maintained for a preset value.

[0008] By employing the above technical solution, a pressure detection device is used to detect the total gas pressure in both the input and output pipelines. When both the input and output pipelines are functioning normally, the changes in the first and second gas pressure values ​​will be the same. However, if a leak exists in either the input or output pipeline, the gas will continuously leak. If the changes in the first and second gas pressure values ​​are detected to be different, and this difference persists for a period exceeding a preset value, it can be determined that a gas leak exists between the input and output pipelines. The gas pipeline can then be automatically shut off by controlling the switching valve via a controller, ensuring safe gas usage.

[0009] Furthermore, the movement of the blockage body within the valve body converts the gas pressure value into the pressure value output by the sensor. The contact between the blockage body and the blockage wall ensures that the pipeline is in a cut-off state. In the event of a leak or gas usage, the gas flow will cause the blockage body to move, converting it into a corresponding pressure value, thus making the gas pressure detection more accurate.

[0010] Optionally, the controller is provided with a manual button, which is used to activate the switching valve.

[0011] By adopting the above technical solution, the controller can be operated manually using a button. After troubleshooting, the switch valve can be manually restarted to ensure the normal use of gas.

[0012] Optionally, the controller includes a control host and multiple control slaves. The control host is connected to the pressure sensor in the input pipe, and the control slaves are connected to the pressure sensor in the output pipe. All of the multiple control slaves are communicatively connected to the control host.

[0013] By adopting the above technical solution, each pressure detection device installed in the pipeline is controlled by a controller to collect the values ​​of the pressure sensor. The controller in the input pipeline is used as the master controller, and the controller in the output pipeline is used as the slave controller. Data transmission is achieved by using the communication connection between the slave controller and the master controller.

[0014] Optionally, a first metal plate is provided on the blocking wall, and a second metal plate is provided on the side of the blocking body; two wires are passed through the valve body, one of which connects the first metal plate and the ground wire, and the other of which connects the second metal plate and the controller.

[0015] By employing the above technical solution, the first and second metal plates are used as trigger switches. When the blocking body and the blocking wall are in contact, the first and second metal plates are in contact, enabling the controller to detect the ground signal. When the blocking body and the blocking wall separate, the first and second metal plates separate, and the controller cannot detect the ground signal. At this time, the undetected ground signal can be used as the value of the pressure sensor internally acquired by the controller, reducing the power consumption of the controller.

[0016] Optionally, the length of the second metal sheet is greater than the length of the first metal sheet.

[0017] By adopting the above technical solution, the length of the second metal sheet is set to be longer than that of the first metal sheet. During the contact process between the blocking body and the blocking wall, the contact effect between the first and second metal sheets can be increased, thereby increasing the accuracy of triggering.

[0018] Optionally, an alarm device is also included, which is connected to the controller and installed on the input pipeline. The alarm device outputs an alarm message when the controller detects that the change in the first gas pressure value and the change in the second gas pressure value are different.

[0019] By adopting the above technical solution, when the controller detects a gas leak, it controls the alarm to issue a warning message, so as to promptly inform the people in the household to pay attention to the gas leak and take appropriate measures in time.

[0020] Optionally, two support rods are provided, and a slider is fixedly provided on the support rod, with the slider and the support rod slidingly engaged.

[0021] By adopting the above technical solution, the sliding effect of the slide rod is improved by utilizing the cooperation of the slider on the slide rod and the support rod, thereby increasing the stability of the repetitive movement and repetitive contact between the blocking body and the valve body.

[0022] Optionally, the blocker is made of rubber.

[0023] By adopting the above technical solution, the blocking body is made of rubber material, which increases the tightness of the contact between the blocking body and the valve body.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a pressure detection device to detect the total gas pressure in the input pipeline and the total gas pressure in the output pipeline, if the change in the first gas pressure value and the change in the second gas pressure value are different and the duration of the difference exceeds a preset value, it can be determined that there is a gas leak in the input pipeline and the output pipeline. The gas pipeline can be automatically shut off to ensure the safety of gas use.

[0025] 2. By utilizing the contact action between the blockage body and the blockage wall, the pressure sensor reading can be altered by the movement of the blockage body when a gas leak occurs, thereby improving detection sensitivity.

[0026] 3. It can perform trigger detection when the blocking body and blocking wall separate, effectively reducing the power loss of the controller. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the connection of a gas pipeline with an automatic shut-off function according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of a pressure detection device in a gas pipeline with an automatic shut-off function, according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Input pipe; 2. Output pipe; 3. Pressure detection device; 31. Valve body; 311. Blocking wall; 312. First metal plate; 313. Wire; 32. Gas pipeline; 33. Blocking body; 331. Second metal plate; 34. Sliding rod; 35. Support rod; 351. Sliding block; 36. Spring; 37. Pressure sensor; 4. Controller; 41. Control host; 42. Control slave; 5. Switch valve. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -and appendix Figure 2 This application will be described in further detail.

[0031] In the description of this embodiment, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0032] This application discloses a gas pipeline with an automatic shut-off function. (Refer to...) Figure 1 and Figure 2A gas pipeline with an automatic shut-off function includes an input pipeline 1, an output pipeline 2, a pressure detection device 3, a switching valve 5, a controller 4, and an alarm. Multiple output pipelines 2 are provided, and all output pipelines 2 are connected to the input pipeline 1. The switching valve 5 is located in the input pipeline 1, and the alarm is installed on the input pipeline 1. The input pipeline 1 is connected to the output port of the gas meter installed by the gas company in each household. Gas flows in from the inlet pipeline, passes through the gas meter, and enters the input pipeline 1. The pressure detection device 3 is located on the input pipeline 1 and is positioned downstream of the switching valve 5 along the gas inlet direction. The pressure detection device 3 is also located on each output pipeline 2 to detect the gas pressure value in each pipeline.

[0033] The controller 4 receives the pressure values ​​detected by the pressure detection devices 3 on each pipeline. When a difference is detected between the gas input pressure and the gas output pressure, the controller 4 determines that there is a gas leak in the pipeline. At this time, the controller 4 controls the switch valve 5 to close, cutting off the gas input. At the same time, it also issues a warning message through an alarm device electrically connected to the controller 4 to promptly remind the people in the house.

[0034] Reference Figure 2 The pressure detection device 3 includes a valve body 31, a blocking body 33, a sliding rod 34, a support rod 35, a spring 36, a pressure sensor 37, a first metal plate 312, a second metal plate 331, and a wire 313. The valve body 31 is provided with an inlet and an outlet, through which it connects to the input pipe 1 or the output pipe 2. A gas pipeline 32 is provided within the valve body 31. The blocking body 33, sliding rod 34, support rod 35, spring 36, pressure sensor 37, first metal plate 312, and second metal plate 331 are all disposed within the gas pipeline 32, while the wire 313 passes through the valve body 31. In this embodiment, the input pipe 1 is a metal pipe, the output pipe 2 is a rubber hose, and the valve body 31 is made of a metal alloy.

[0035] Two support rods 35 are provided, spaced apart, and each support rod 35 is fixedly equipped with a slider 351. The slider 34 slides within the gas pipeline 32 through a sliding engagement between the slider 351 and the sliding rod 34. In this embodiment, the gas pipeline 32 has a circular cross-section, and the sliding rod 34 slides along the central axis of the gas pipeline 32.

[0036] The blocker 33 is fixedly mounted on the end of the slide rod 34 near the air intake port; the pressure sensor 37 is mounted on the support rod 35 near the air intake port, and the pressure sensor 37 is located on the side of the support rod 35 near the air intake port. The spring 36 is sleeved on the slide rod 34, and the two ends of the spring 36 abut against the blocker 33 and the pressure sensor 37 respectively.

[0037] A blocking wall 311 with a gradually increasing opening area is provided in the gas pipeline 32 along the gas intake direction. Under the elastic force of the spring 36, the blocking wall 311 and the blocking body 33 abut and seal. Specifically, the blocking body 33 is conical in shape and is made of rubber. Under the force of the spring 36, the conical side of the blocking body 33 abuts against the blocking wall 311, thereby sealing the gas pipeline 32 between the gas intake and exhaust ports of the pressure detection device 3.

[0038] After some gas-using devices connected to the output pipe 2 are turned on, the pressure value at the outlet port of the pressure detection device 3 on the output pipe 2 decreases. At this time, the pressure value at the inlet port of the pressure detection device 3 is greater than the pressure value at the outlet port. The gas will push the block 33 to move, causing the spring 36 to be further compressed, and the pressure value detected by the pressure sensor 37 will increase.

[0039] As for the pressure detection device 3 on the input pipe 1, the pressure value at the air inlet is also greater than the pressure value at the air outlet. However, the blockage 33 inside the pressure detection device 3 on the input pipe 1 moves, causing the spring 36 to be further compressed, and the pressure value detected by the pressure sensor 37 in the input pipe 1 will also increase.

[0040] The controller 4 is electrically connected to the pressure sensor 37. The controller 4 receives pressure changes on each pipeline and calculates whether the pressure changes on input pipeline 1 and output pipeline 2 are the same to determine if a gas leak has occurred. Then, based on the calculation and analysis, the controller 4 controls the opening or closing of the switching valve 5 to achieve the automatic shut-off function of the gas pipeline.

[0041] Specifically, controller 4 includes a control host 41 and control slaves 42. The control host 41 is electrically connected to the pressure sensor 37 in input pipe 1, and the control slaves 42 are electrically connected to the pressure sensor 37 in output pipe 2. Each control slave 42 is communicatively connected to the control host 41 to facilitate the transmission of pressure change values ​​detected in each output pipe 2 to the control host 41. The control host 41 analyzes and determines whether a gas leak has occurred, and controls the opening or closing of input pipe 1 via the switch valve 5 electrically connected to the control host 41. Furthermore, after the control host 41 controls the switch valve 5 to close, the control host 41 controls an alarm to issue a warning message, promptly alerting personnel to the situation.

[0042] In addition, a manual button is provided on the control host 41. The manual button provides a manual trigger signal to the control host 41, causing the control host 41 to re-open the closed switch valve 5.

[0043] The specific implementation process is as follows. If there is no leak in the gas pipeline between the pressure detection device 3 on the input pipeline 1 and the pressure detection device 3 on the output pipeline 2, then the change in the first gas pressure value detected by the pressure detection device 3 on the input pipeline 1 and the change in the second gas pressure value detected by the pressure detection device 3 on the output pipeline 2 are the same.

[0044] That is, if one output pipe 2 is activated, the change in the first gas pressure value detected by the pressure detection device 3 on the input pipe 1 is the same as the change in the second gas pressure value detected by the pressure detection device 3 on the current output pipe 2; if two or more output pipes 2 are activated, the change in the first gas pressure value detected by the pressure detection device 3 on the input pipe 1 is the same as the sum of the changes in the second gas pressure value detected by the pressure detection devices 3 on all output pipes 2.

[0045] If a gas pipeline leaks between the pressure detection device 3 on the input pipeline 1 and the pressure detection device 3 on the output pipeline 2, there will be a difference between the first gas pressure change detected by the pressure detection device 3 on the input pipeline 1 and the second gas pressure change detected by the pressure detection device 3 on the output pipeline 2.

[0046] Specifically, if the gas-using equipment connected to the output pipe 2 is not in use, the gas pressure at the inlet of the pressure detection device 3 on the output pipe 2 will be lower than the gas pressure at the outlet of the pressure detection device 3. However, at this time, the blockage body 33 and the blockage wall 311 are still in contact, and the pressure value detected by the pressure sensor 37 on the support rod 35 does not change.

[0047] Regarding the pressure detection device 3 on the input pipe 1, the gas pressure at the inlet of the pressure detection device 3 is greater than the gas pressure at the outlet of the pressure detection device 3. However, at this time, the blocker 33 is pushed to move under the action of the input gas pressure. For the pressure sensor 37 on the support rod 35, the detected pressure value increases.

[0048] The controller 4 detects that the change in the second gas pressure on the output pipe 2 is zero, while the change in the first gas pressure on the input pipe 1 is greater than zero. Since the change in the first gas pressure is greater than the change in the second gas pressure, a gas leak can be identified.

[0049] If the gas-using equipment connected to the output pipe 2 is activated, the gas pressure at the inlet of the pressure detection device 3 on the output pipe 2 will be greater than the gas pressure at the outlet of the pressure detection device 3. At this time, the blocker 33 will be pushed to move under the action of the input gas pressure, and the pressure sensor 37 on the support rod 35 will detect an increase in pressure.

[0050] For the pressure detection device 3 on the input pipe 1, the gas pressure at the inlet of the pressure detection device 3 is also greater than the gas pressure at the outlet of the pressure detection device 3. At this time, the blocker 33 is pushed to move under the action of the input gas pressure. For the pressure sensor 37 on the support rod 35, the detected pressure value increases.

[0051] However, due to gas leakage, the gas pressure entering output pipe 2 is lower than the gas pressure exiting input pipe 1. Therefore, the second gas pressure change detected in output pipe 2 is less than the first gas pressure change detected in input pipe 1.

[0052] Therefore, regardless of whether output pipe 2 is in use, as long as the change in the first gas pressure is greater than the change in the second gas pressure, it can be determined that a gas leak has occurred.

[0053] In addition, to further reduce the power consumption of the control host 41 and the control slave 42, a trigger switch can be installed inside the valve body 31. After the trigger switch is triggered, it provides a signal to the controller 4, enabling the controller 4 to automatically start data acquisition.

[0054] Specifically, the trigger switch consists of a first metal plate 312, a second metal plate 331, and two wires 313. The first metal plate 312 is disposed on the blocking wall 311, the second metal plate 331 is disposed on the side of the blocking body 33, and the two wires 313 pass through the valve body 31. One wire 313 connects the first metal plate 312 to the ground wire, and the other wire 313 connects the second metal plate 331 to the control host 41. When the blocking body 33 and the blocking wall are in contact, the first metal plate 312 and the second metal plate 331 make contact and conduct, the control host 41 detects the ground signal, and thus causes the control host 41 to sample the pressure change. When the control host 41 does not sample, the default pressure change is zero.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas pipeline with an automatic shut-off function, characterized in that, include: An input pipe (1) is used to connect to the gas pipeline entering the house, and a switch valve (5) is provided on the input pipe (1); Output pipe (2), multiple output pipes (2) are provided, and multiple output pipes (2) are connected to the input pipe (1); A pressure detection device (3) is installed in the input pipe (1) and the output pipe (2). The pressure detection device (3) includes a valve body (31), a blocking body (33), a slide rod (34), a support rod (35), a spring (36), and a pressure sensor (37). A gas pipeline (32) is installed inside the valve body (31). A blocking wall (311) with an opening area gradually increasing along the gas inlet direction is installed in the gas pipeline (32). The support rod (35) is installed inside the gas pipeline (32). The slide rod (34) slides through the support rod (35). The pressure sensor (37) is installed on the side of the support rod (35) near the gas inlet. The blocking body (33) is installed between the blocking wall (311) and the support rod (35). The spring (36) abuts against the blocking body (33) and the pressure sensor (37). The controller (4) is electrically connected to the switching valve (5) and the pressure sensor (37) respectively. The controller (4) receives the change in the first gas pressure value in the input pipe (1) and the change in the second gas pressure value in the output pipe (2). The controller (4) is configured to control the switching valve (5) to close when it detects that the change in the first gas pressure value and the change in the second gas pressure value are different and the different values ​​are maintained for a longer than a preset value.

2. The gas pipeline with automatic shut-off function according to claim 1, characterized in that: The controller (4) is equipped with a manual button, which is used to turn on the switching valve (5).

3. The gas pipeline with automatic shut-off function according to claim 1, characterized in that: The controller (4) includes a control host (41) and multiple control slaves (42). The control host (41) is connected to the pressure sensor (37) in the input pipe (1), and the control slaves (42) are connected to the pressure sensor (37) in the output pipe (2). All of the multiple control slaves (42) are communicatively connected to the control host (41).

4. The gas pipeline with automatic shut-off function according to claim 1, characterized in that: A first metal plate (312) is provided on the blocking wall (311), and a second metal plate (331) is provided on the side of the blocking body (33); two wires (313) are passed through the valve body (31), one of the wires (313) is connected to the first metal plate (312) and the ground wire, and the other wire (313) is connected to the second metal plate (331) and the controller (4).

5. The gas pipeline with automatic shut-off function according to claim 4, characterized in that: The length of the second metal sheet (331) is greater than the length of the first metal sheet (312).

6. The gas pipeline with automatic shut-off function according to claim 1, characterized in that: It also includes an alarm device, which is installed on the input pipe (1) and connected to the controller (4). The alarm device outputs an alarm message when the controller (4) detects that the change in the first gas pressure value and the change in the second gas pressure value are different.

7. The gas pipeline with automatic shut-off function according to claim 1, characterized in that: Two support rods (35) are provided, and a slider (351) is fixedly provided on the support rod (35). The slider (34) and the slider (351) are in sliding cooperation.

8. The gas pipeline with automatic shut-off function according to claim 1, characterized in that: The blocking body (33) is made of rubber.

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