Gas pressure detection mechanism

Abstract

The utility model provides a coal gas pressure detection mechanism, which comprises a pipe body, a gas nozzle and a pressure detector, a flow channel is arranged in the pipe body, the gas nozzle is connected to one end of the pipe body and is communicated with the flow channel, and the pressure detector is connected to the pipe body and is used for detecting air pressure in the flow channel; one end, far away from the air tap, of the pipe body is connected with an exhaust pipe; the exhaust pipe is communicated with the flow channel; an electric control switch is connected to the exhaust pipe and used for opening or closing the exhaust pipe. When the first leakage detection of the gas pipeline is finished, the gas pipeline can be decompressed only by opening the exhaust pipe through the electric control switch, after the pressure in the gas pipeline is reduced to normal pressure, the exhaust pipe is closed through the electric control switch, secondary detection is carried out, a user does not need to frequently plug and unplug the gas nozzle, the operation is simple and convenient, and the risk of gas leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure detection devices, and specifically relates to a gas pressure detection mechanism. Background Art

[0002] A gas pressure detector is a device used to measure the gas pressure on a gas pipeline to determine whether the gas pipeline leaks. Common gas pressure detectors generally include a housing, a detection tube, a pressure sensor, and a nozzle. One end of the detection tube is connected to the pressure sensor, and the other end is connected to the nozzle. When detecting the leakage of a gas pipeline, the nozzle needs to be connected to the gas pipeline, then the gas valve is opened for a period of time. After the pressure in the gas pipeline is stable, the gas valve is closed, and then the gas pressure is detected by the pressure sensor. During the detection period, if the gas pressure remains basically unchanged, it indicates that the gas pipeline is sealed normally. If the gas pressure drops by more than a preset limit, it indicates that the gas pipeline leaks. In this way, the staff can eliminate potential safety hazards in time and avoid explosions.

[0003] However, when detecting the leakage of a gas pipeline, if the gas valve leaks, it will continuously supply pressure to the gas pipeline during the detection period. Even if there is a leakage problem in the gas pipeline, it may not be detected. Therefore, after the above detection is completed, the nozzle needs to be removed from the gas pipeline. When the air pressure in the gas pipeline drops to atmospheric pressure, the nozzle is then connected to the gas pipeline for a second detection. If the air pressure in the gas pipeline remains unchanged, it indicates that the gas valve is normal. If the air pressure increases, it indicates that the gas valve leaks. Since the second detection requires removing and reconnecting the nozzle to the gas pipeline, the detection process is very troublesome, and multiple pluggings and unpluggings of the gas pipeline are likely to cause loose connections, affecting the detection results. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide a gas pressure detection mechanism with simple operation and accurate detection.

[0005] The technical solution of the utility model is to provide a gas pressure detection mechanism with the following structure:

[0006] It includes a pipe body, a nozzle, and a pressure detector. There is a flow channel inside the pipe body. The nozzle is connected to one end of the pipe body and is in communication with the flow channel. The pressure detector is connected to the pipe body and is used to detect the air pressure in the flow channel. The end of the pipe body away from the nozzle is connected with an exhaust pipe, and the exhaust pipe is in communication with the flow channel. An electric control switch is connected to the exhaust pipe, and the electric control switch is used to open or close the exhaust pipe.

[0007] After adopting the above structure, the gas pressure detection mechanism in the utility model has the following advantages compared with the prior art:

[0008] When the first gas pipeline leakage detection is completed, simply open the exhaust pipe through the electric control switch to relieve the pressure of the gas pipe. After the pressure in the gas pipe drops to normal pressure, close the exhaust pipe through the electric control switch for secondary detection. There is no need for the user to frequently plug and unplug the nozzle, the operation is simple and convenient, and the risk of air leakage is reduced.

[0009] Preferably, a detection pipe is connected to the outer peripheral wall of the pipe body. The detection pipe is communicated with the flow channel, and the pressure detector is detachably connected to the free end of the detection pipe. After such a setting, it is convenient to disassemble and replace when the pressure detector is damaged, and there is no need to replace the entire gas pressure detection mechanism, saving costs.

[0010] Preferably, it further includes a fixed base. There is an accommodation cavity in the fixed base. The pipe body, the exhaust pipe, the detection pipe, the pressure detector and the electric control switch are all arranged in the accommodation cavity, and the nozzle and the exhaust end of the exhaust pipe are both arranged outside the fixed base.

[0011] Preferably, the accommodation cavity is filled with sealant, and the sealant is used to seal the pressure detector and the electric control switch in the accommodation cavity. This can isolate the electrical components from the gas, avoid the circuit generating sparks to ignite the gas, and reduce the risk of gas explosion.

[0012] Preferably, a support frame with an arc-shaped groove at the top is arranged in the accommodation cavity of the fixed base for supporting the pipe body.

[0013] Preferably, the electric control switch is a solenoid valve. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the present invention.

[0015] Figure 2 It is a schematic partial structural diagram of the present invention.

[0016] Figure 3 It is a partial cross-sectional view of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the fixed base in the present invention.

[0018] Description of the Reference Numerals:

[0019] 1. Pipe body, 11. Flow channel, 2. Nozzle, 3. Pressure detector, 4. Exhaust pipe, 5. Electric control switch, 6. Detection pipe, 7. Fixed base, 71. Accommodation cavity, 72. Support frame. Detailed Embodiment

[0020] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present utility model. At the same time, the terms "first", "second", etc. are only used to distinguish the names of each component and do not have a primary or secondary relationship, so it should not be construed as a limitation to the present utility model.

[0022] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, the present utility model discloses a gas pressure detection mechanism, which includes a pipe body 1, a nozzle 2 and a pressure detector 3. There is a flow channel 11 inside the pipe body 1. The nozzle 2 is connected to one end of the pipe body 1 and is in communication with the flow channel 11. The pressure detector 3 is connected to the pipe body 1 and is used to detect the air pressure in the flow channel 11.

[0023] One end of the pipe body 1 away from the nozzle 2 is connected with an exhaust pipe 4, and the exhaust pipe 4 is in communication with the flow channel 11; an electric control switch 5 is connected to the exhaust pipe 4, and the electric control switch 5 is used to open or close the exhaust pipe 4.

[0024] The electric control switch 5 can be a solenoid valve. The pressure detector 3 and the solenoid valve are both electrically connected to the controller of the gas pressure detector, and the controller is electrically connected to the touch display screen of the gas pressure detector. The opening and closing of the solenoid valve and the display of the pressure detection result can be controlled through the touch display screen.

[0025] A detection pipe 6 is connected to the outer peripheral wall of the pipe body 1, and the detection pipe 6 is in communication with the flow channel 11. The pressure detector 3 is detachably connected to the free end of the detection pipe 6. After such a setting, it is convenient to disassemble and replace when the pressure detector 3 is damaged, and there is no need to replace the entire gas pressure detection mechanism, which saves costs.

[0026] The gas pressure detection mechanism further includes a fixed base 7. There is an accommodation cavity 71 inside the fixed base 7. The pipe body 1, the exhaust pipe 4, the detection pipe 6, the pressure detector 3 and the electric control switch 5 are all arranged in the accommodation cavity 71, and the nozzle 2 and the exhaust end of the exhaust pipe 4 are both arranged outside the fixed base 7.

[0027] The accommodation cavity 71 is filled with sealant, which is used to seal the pressure detector 3 and the electric control switch 5 (i.e., the electrical component) in the accommodation cavity 71. In this way, the electrical component can be isolated from the gas, avoiding the ignition of the gas by the spark generated in the circuit and reducing the risk of gas explosion.

[0028] In the accommodation cavity 71 of the fixed base 7, there is a support frame 72 with an arc-shaped groove at the top, which is used to conveniently support the pipe body 1.

[0029] When the gas pressure detection mechanism of the present utility model is in use, first connect the gas pipe to the nozzle 2, then open the gas valve for a period of time. After the pressure is stable, close the gas valve and conduct the first pressure detection. If the pressure decreases, it indicates that the gas pipe leaks. If the pressure remains unchanged, conduct the second detection; before the second detection, just open the exhaust pipe 4 through the electric control switch 5 to relieve the pressure of the gas pipe. After the pressure in the gas pipe drops to normal pressure, then close the exhaust pipe 4 through the electric control switch 5 and conduct the second detection. If the pressure remains unchanged, it indicates that the gas pipe is normal. If the pressure increases, it indicates that the gas valve leaks; during the whole second detection process, there is no need for the user to frequently plug and unplug the nozzle 2, which is not only simple and convenient to operate, but also can reduce the risk of air leakage.

[0030] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A gas pressure detection mechanism, comprising a pipe body (1), a gas nozzle (2) and a pressure detector (3), wherein the pipe body (1) has a flow channel (11), the gas nozzle (2) is connected to one end of the pipe body (1) and communicates with the flow channel (11), and the pressure detector (3) is connected to the pipe body (1) and is used to detect the gas pressure in the flow channel (11); characterized in that: An exhaust pipe (4) is connected to one end of the tube body (1) away from the air nozzle (2), and the exhaust pipe (4) is in communication with the flow channel (11); an electric control switch (5) is connected to the exhaust pipe (4), and the electric control switch (5) is used to open or close the exhaust pipe (4).

2. The gas pressure detection mechanism according to claim 1, characterized in that: A detection tube (6) is connected to the outer peripheral wall of the tube body (1), the detection tube (6) is connected to the flow channel (11), and the pressure detector (3) is detachably connected to the free end of the detection tube (6).

3. The gas pressure detection mechanism according to claim 2, characterized in that: The invention also comprises a fixed base (7), wherein the fixed base (7) has a containing cavity (71), the tube body (1), the exhaust pipe (4), the detection tube (6), the pressure detector (3) and the electric control switch (5) are all arranged in the containing cavity (71), and the air nozzle (2) and the exhaust end of the exhaust pipe (4) are both arranged outside the fixed base (7).

4. The gas pressure detection mechanism according to claim 3, characterized in that: The accommodating cavity (71) is filled with sealant, and the sealant is used to seal the pressure detector (3) and the electric control switch (5) in the accommodating cavity (71).

5. The gas pressure detection mechanism according to claim 4, characterized in that: A support frame (72) having an arc-shaped groove on the top is provided in the accommodating cavity (71) of the fixed base (7) and is used to support the tube body (1).

6. The gas pressure detection mechanism according to claim 1, characterized in that: The electric control switch (5) is a solenoid valve.

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