Fuel gas connecting tool with fuel gas on-off and leakage detection function

Abstract

The invention discloses a fuel gas connecting tool with fuel gas on-off and leakage detection functions. The fuel gas connecting tool comprises a main body, a fuel gas sensor, a fuel gas on-off sensor and a control assembly. The main body is provided with a fuel gas access channel and a fuel gas output channel, the fuel gas sensor is arranged on the main body and used for detecting whether fuel gas leaks or not, and the fuel gas on-off sensor is arranged on the main body and used for detecting whether fuel gas is input into the fuel gas access channel or not. The control assembly is arranged on the main body, the control assembly comprises a control circuit board and an alarm, the control circuit board is electrically connected with the gas sensor and the gas on-off sensor, the alarm is electrically connected with the control circuit board, the control circuit board is provided with a controller, and the controller is provided with a gas on working mode and a monitoring working mode. According to the gas connecting tool, the gas leakage risk can be found as early as possible.

Description

Technical Field

[0001] The present invention relates to gas appliances, and particularly to a gas connection appliance with gas on-off and leakage detection. Background Art

[0002] Some existing gas connection appliances used for transmitting or controlling gas in a gas system, such as pressure reducing valves, etc., have a risk of gas leakage if installed and maintained improperly. In the prior art, to ensure the use safety, generally a gas sensor is installed in the gas-using environment for detection. The gas sensor can detect the gas in the environment, and when gas appears in the use environment, an alarm can be given through an alarm. However, the foregoing structure is not optimized enough for the detection of gas leakage and cannot discover the risk as early as possible and as quickly as possible. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a gas connection appliance with gas on-off and leakage detection, which can discover the gas leakage risk as early as possible and as quickly as possible.

[0004] A gas connection appliance with gas on-off and leakage detection according to an embodiment of the present invention includes: a main body provided with a gas access channel and a gas output channel; a gas sensor disposed on the main body and used for detecting whether there is gas leakage; a gas on-off sensor disposed on the main body and used for detecting whether gas is input into the gas access channel; a control component disposed on the main body, the control component includes a control circuit board and an alarm, the control circuit board is electrically connected to the gas sensor and the gas on-off sensor, the alarm is electrically connected to the control circuit board, the control circuit board is provided with a controller and the controller is provided with a gas-on working mode and a monitoring working mode: after the gas on-off sensor detects that gas is input, the controller enters the gas-on working mode, the controller immediately detects whether there is gas leakage through the gas sensor, and when there is gas leakage, an alarm is given through the alarm; when no gas leakage is detected in the gas-on working mode, the controller enters the monitoring working mode, the controller detects whether there is gas leakage through the gas sensor at a predetermined frequency, and when there is gas leakage, an alarm is given through the alarm.

[0005] A gas connection appliance with gas on / off and leakage detection according to an embodiment of the present invention has at least the following beneficial effects: The above gas connection appliance is provided with a gas sensor and a gas on / off sensor. The controller of the control circuit board has two operating modes. When the gas is turned on, the detection of gas leakage is immediately carried out to ensure that the leakage risk can be found immediately at the initial stage of gas use and after the gas connection appliance is installed. In the normal state, the control circuit board monitors the gas leakage at a predetermined frequency, so as to realize the leakage risk investigation all day long. Since the gas connection appliance is equipped with a gas sensor itself, the gas leakage detection can be carried out at a position closer to the gas use. Moreover, by immediately detecting the gas leakage when the gas is turned on, the risk can be investigated as soon as possible. And by detecting at a certain frequency usually, the risk investigation all day long is realized. The combination of the above two detection modes greatly improves the safety of gas use.

[0006] According to some embodiments of the present invention, the control component further includes a battery, and the battery is arranged on the main body and used to provide electrical energy for the components that need electricity.

[0007] According to some embodiments of the present invention, the main body includes an input pipe part, the gas access channel is arranged in the input pipe part, a handwheel is rotatably arranged on the input pipe part, and the handwheel is connected with a threaded connection structure that rotates coaxially therewith; the handwheel is of a shell structure and rotatably sleeved on the input pipe part. The end of the input pipe part is provided with an air inlet communicated with the gas access channel. The handwheel is provided with a pre-gas collection cavity and a sensor installation cavity. The pre-gas collection cavity corresponds to the end of the input pipe part and is arranged around the input pipe part. The pre-gas collection cavity is provided with a collection opening, and the orientation of the collection opening is the same as that of the air inlet. The sensor installation cavity is arranged at the rear side of the pre-gas collection cavity, and the sensor installation cavity is communicated with the pre-gas collection cavity. The gas sensor is installed in the sensor installation cavity, and the handwheel is provided with a first communication hole communicating the sensor installation cavity and the outer peripheral side position of the handwheel.

[0008] According to some embodiments of the present invention, the pre-gas collection cavity and the sensor installation cavity are separated by a partition board, and the partition board is provided with a plurality of second communication holes arranged around the input pipe part. The pre-gas collection cavity is communicated with the sensor installation cavity through the second communication holes.

[0009] According to some embodiments of the present invention, a plurality of the first communication holes are arranged around the rotation axis of the handwheel.

[0010] According to some embodiments of the present invention, the input pipe portion is provided with a mounting portion, the gas sensor is connected to a mounting circuit board, the mounting portion is provided with a positioning column and a threaded hole, the mounting circuit board is provided with a positioning hole adapted to the positioning column, and a mounting hole opposite to the threaded hole, the mounting circuit board abuts against the mounting portion, the positioning column is inserted into the positioning hole, the mounting hole is penetrated by a fastening screw, the fastening screw is threadedly connected to the threaded hole and locks the mounting circuit board to the mounting portion.

[0011] According to some embodiments of the present invention, the main body includes an input pipe portion, the gas access channel is arranged in the input pipe portion, a detection hole is opened in the channel wall of the gas access channel, the input pipe portion is provided with a tympanic membrane and a fixing member, the tympanic membrane is sealed on the outer end of the detection hole, the fixing member is used to fix the tympanic membrane to the input pipe portion, the gas on-off sensor is a pressure sensor, and the detection end of the gas on-off sensor is arranged on the side of the tympanic membrane away from the detection hole.

[0012] According to some embodiments of the present invention, the main body includes a valve body and a mounting cover, the mounting cover is connected to the valve body and encloses the valve body to form a first electrical installation cavity, and the control circuit board is fixedly connected to the valve body and arranged in the first electrical installation cavity.

[0013] According to some embodiments of the present invention, the mounting cover is provided with a second electrical appliance mounting cavity, the second electrical appliance mounting cavity is provided with an loading opening, the mounting cover is detachably connected with a cover for covering the loading opening, and the control component also includes a battery for providing electrical energy to components requiring electricity, and the battery is arranged in the second electrical appliance mounting cavity.

[0014] According to some embodiments of the present invention, the mounting cover is provided with a mounting screw, which passes through the sealing cover and the mounting cover and is threadedly connected to the valve body, and is used to fasten the sealing cover and the mounting cover to the valve body.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention;

[0018] Figure 2 An exploded diagram of an embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0020] Figure 4 is Figure 3 a partially enlarged schematic view of the structure shown;

[0021] Figure 5 is Figure 4 an enlarged schematic view of portion A of

[0022] Figure 6 is a partial structural schematic view of the embodiment of the present invention with the handwheel and the threaded connection structure removed.

[0023] Reference numerals:

[0024] main body 100, gas access passage 110, gas output passage 120, input pipe portion 130, air inlet 131, installation portion 140, detection hole 150, installation groove 132, valve body 160, installation cover 170, output pipe portion 180, seal cover 190;

[0025] gas sensor 200;

[0026] gas on-off sensor 300;

[0027] control assembly 400, control circuit board 410, battery 430;

[0028] handwheel 500, front gas accumulation cavity 510, sensor installation cavity 520, first communication hole 530, second communication hole 540;

[0029] threaded connection structure 600;

[0030] installation circuit board 700;

[0031] drum membrane member 810, fixing member 820, washer 830, top pressing convex ring 821, fitting portion 811, bent portion 812, outer peripheral portion 813, socket ring 831;

[0032] connection post 910, first semi-circular plate 920, second semi-circular plate 930. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end: The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, understand "greater than", "less than", "exceeding", etc. as not including the recited number, and understand "above", "below", "within", etc. as including the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0037] Referring to Figures 1 to 6 , a gas connection appliance with gas on-off and leakage detection, which includes: a main body 100, a gas sensor 200, a gas on-off sensor 300, and a control component 400. The main body 100 is provided with a gas access channel 110 and a gas output channel 120. The gas sensor 200 is arranged on the main body 100 and is used to detect whether there is gas leakage. The gas on-off sensor 300 is arranged on the main body 100 and is used to detect whether gas is input into the gas access channel 110. The control component 400 is arranged on the main body 100. The control component 400 includes a control circuit board 410 and an alarm. The control circuit board 410 is electrically connected to the gas sensor 200 and the gas on-off sensor 300. The alarm is electrically connected to the control circuit board 410. The control circuit board 410 is provided with a controller, and the controller is provided with a gas connection working mode and a monitoring working mode: after the gas on-off sensor 300 detects that gas is input, the controller enters the gas connection working mode, and the controller immediately detects whether there is gas leakage through the gas sensor 200. When there is gas leakage, an alarm is given through the alarm; when no gas leakage is detected in the gas connection working mode, the controller enters the monitoring working mode, and the controller detects whether there is gas leakage through the gas sensor 200 at a predetermined frequency. When there is gas leakage, an alarm is given through the alarm.

[0038] The above-mentioned gas connection appliance is provided with a gas sensor 200 and a gas on-off sensor 300. The controller of the control circuit board 410 is provided with two operating modes. When the gas is turned on, the detection of gas leakage is immediately carried out to ensure that the leakage risk can be found immediately in the initial stage of gas use and after the gas connection appliance is installed. In the normal state, the control circuit board 410 monitors gas leakage at a predetermined frequency, so as to realize the inspection of leakage risk all day long. Since the gas connection appliance is equipped with a gas sensor 200 itself, the gas leakage detection can be carried out at a position closer to the gas use, and by immediately detecting gas leakage when the gas is turned on, the risk can be detected as soon as possible and as early as possible, and the inspection is carried out at a certain frequency usually, so as to realize the inspection of risk all day long. The combination of the above two detection modes greatly improves the safety of gas use.

[0039] In the embodiment, in the gas-on working mode, a predetermined detection time can be set. If no gas leakage is detected after exceeding the predetermined detection time, the controller can judge that there is no gas leakage in the gas-on working mode, and then switch to the monitoring working mode.

[0040] In the embodiment, the control component 400 further includes a battery 430. The battery 430 is arranged in the main body 100 and is used to provide electric energy for the components that need electricity. By further arranging the battery 430, the external power supply through wires is avoided, so it is convenient to use and can be installed at any position.

[0041] In the embodiment, the controller of the control circuit board 410 can be a single-chip microcomputer or a control circuit with control functions, etc., as long as the corresponding electric control functions can be realized.

[0042] In the embodiment, the main body 100 includes an input pipe part 130. The gas access channel 110 is arranged in the input pipe part 130. A hand wheel 500 is rotatably arranged on the input pipe part 130. The hand wheel 500 is connected with a threaded connection structure 600 that rotates coaxially therewith. The hand wheel 500 is of a shell structure and rotatably sleeved on the input pipe part 130. The end of the input pipe part 130 is provided with an air inlet 131 communicated with the gas access channel 110. The hand wheel 500 is provided with a front gas collecting cavity 510 and a sensor installation cavity 520. The front gas collecting cavity 510 is arranged corresponding to the end of the input pipe part 130 and surrounds the input pipe part 130. The front gas collecting cavity 510 is provided with a collecting opening. The collecting opening and the air inlet 131 face the same direction. The sensor installation cavity 520 is arranged at the rear side of the front gas collecting cavity 510. The sensor installation cavity 520 is communicated with the front gas collecting cavity 510. The gas sensor 200 is installed in the sensor installation cavity 520. The hand wheel 500 is provided with a first communication hole 530 communicating the sensor installation cavity 520 and the outer peripheral side position of the hand wheel 500.

[0043] When installing a gas connection appliance, the connection and fixation with an external structure are mainly achieved through the threaded connection structure 600 by rotating the handwheel 500. The gas sensor 200 is arranged in the sensor installation cavity 520 of the handwheel 500. On the one hand, it provides good protection for the gas sensor 200; on the other hand, the handwheel 500 is provided with a front gas-gathering cavity 510. If there is a leak during the installation of the appliance, the high-pressure gas will first be ejected and gathered in the front gas-gathering cavity 510, and then immediately leak into the sensor installation cavity 520 communicating with the front gas-gathering cavity 510. Thus, the gas sensor 200 in the sensor installation cavity 520 can come into contact with the leaked gas as soon as possible, realizing gas detection as early as possible. When the control circuit board 410 is in the monitoring working mode, since the sensor installation cavity 520 communicates with the outer periphery of the handwheel 500 through the first communication hole 530, it also effectively ensures the normal monitoring of external gas.

[0044] In the embodiment, the front gas-gathering cavity 510 and the sensor installation cavity 520 are separated by a partition board. The partition board is provided with a plurality of second communication holes 540 arranged around the input pipe portion 130. The front gas-gathering cavity 510 communicates with the sensor installation cavity 520 through the second communication holes 540. With the above structure, a plurality of second communication holes 540 are arranged around the input pipe portion 130, which can effectively ensure the connectivity between the front gas-gathering cavity 510 and the sensor installation cavity 520.

[0045] In the embodiment, a plurality of first communication holes 530 are arranged around the rotation axis of the handwheel 500, so that the connectivity between the sensor installation cavity 520 and the outside is better.

[0046] In the embodiment, the input pipe portion 130 is provided with an installation portion 140. The gas sensor 200 is connected to the installation circuit board 700. The installation portion 140 is provided with positioning posts and threaded holes. The installation circuit board 700 is provided with positioning holes adapted to the positioning posts and installation holes opposite to the threaded holes. The installation circuit board 700 abuts against the installation portion 140. The positioning posts are inserted into the positioning holes, and fastening screws are inserted through the installation holes. The fastening screws are threadedly connected to the threaded holes and lock the installation circuit board 700 to the installation portion 140. With the above structure, the installation of the gas sensor 200 is convenient and firm.

[0047] In an embodiment, a detection hole 150 is formed in the channel wall of the gas access channel 110. The input pipe portion 130 is provided with a diaphragm member 810 and a fixing member 820. The diaphragm member 810 covers the outer end of the detection hole 150, and the fixing member 820 is used to fix the diaphragm member 810 to the input pipe portion 130. The gas on-off sensor 300 is a pressure sensor, and the detection end of the gas on-off sensor 300 is arranged on the side of the diaphragm member 810 away from the detection hole 150. When gas is input into the gas access channel 110, under the pressure of the gas, the diaphragm member 810 deforms towards the detection end of the pressure sensor and presses against the detection end of the pressure sensor, so that it can be detected by the pressure sensor whether gas enters the gas access channel 110.

[0048] In an embodiment, the input pipe portion 130 is provided with an installation groove 132, the detection hole 150 is formed in the bottom of the installation groove 132, and the fixing member 820 is installed in the installation groove 132 and presses the diaphragm member 810 against the bottom of the installation groove 132. In an embodiment, one end of the fixing member 820 is provided with a pressing convex ring 821, and the fixing member 820 presses and fixes the periphery of the diaphragm member 810 against the bottom of the installation groove 132 through the pressing convex ring 821. Specifically, the pressing convex ring 821 presses and fixes the diaphragm member 810 against the bottom of the installation groove 132 through a washer 830. In an embodiment, the diaphragm member 810 includes a fitting portion 811, a folding portion 812 and an outer peripheral portion 813. The fitting portion 811 is used to block and open the detection hole 150 and cooperate with the detection end of the gas on-off sensor 300. The folding portion 812 is arranged around the fitting portion 811 and is connected to the periphery of the fitting portion 811. The outer peripheral portion 813 is connected to the periphery of the folding portion 812, and the pressing convex ring 821 of the fixing member 820 is used to press against the outer peripheral portion 813. The folding portion 812 forms a V-shaped bending structure, so that the diaphragm member 810 has a more stable deformation structure. In an embodiment, the folding portion 812 forms an outer cylindrical surface, the washer 830 is provided with a socket ring 831, the socket ring 831 sleeves the outer cylindrical surface formed by the folding portion 812, and at the same time the pressing convex ring 821 sleeves the socket ring 831, so that the diaphragm member 810 is stably installed and can deform stably. In an embodiment, a convex ring is arranged at the edge of the outer peripheral portion 813 of the diaphragm member 810, and a slot adapted to the convex ring is arranged around the bottom of the installation groove 132. The convex ring and the slot are adapted and inserted into the slot, so that the installation of the diaphragm member 810 is more stable.

[0049] In an embodiment, a threaded hole is formed in the center of the fixing member 820, and the gas on-off sensor 300 is threadedly connected to the threaded hole, and the threaded hole also faces the fitting portion 811 of the diaphragm member 810. In an embodiment, the fixing member 820 and the gas on-off sensor 300 are arranged in the sensor installation cavity 520 of the handwheel 500.

[0050] In an embodiment, the main body 100 mainly includes a valve body 160, a mounting cover 170, an input pipe portion 130, and an output pipe portion 180. One end of the input pipe portion 130 is connected to the valve body 160, and one end of the output pipe portion 180 is connected to the valve body 160. A gas access channel 110 is provided in the input pipe portion 130, and a gas output channel 120 is provided in the output pipe portion 180. The mounting cover 170 is connected to the valve body 160 and encloses with the valve body 160 to form a first electrical component installation cavity. The control circuit board 410 is fixedly connected to the valve body 160 and is arranged in the first electrical component installation cavity. With the above structure, the control circuit board 410 is installed by using the mounting cover 170 and the valve body 160 to enclose and form the first electrical component installation cavity, and the structure is simple and compact. In the embodiment, the control circuit board 410 can be fixed to the valve body 160 by screws.

[0051] In the embodiment, the gas connection appliance is specifically a pressure reducing valve, and a pressure reducing mechanism is provided in the valve body 160 to achieve the pressure reduction of the gas. It can be imagined that in some other embodiments, the gas connection appliance is not limited to the application of the pressure reducing valve, and the gas connection appliance can also be other structures, such as a gas switch valve, a flow valve, or a gas joint, etc., and can be specifically configured according to the actual situation.

[0052] In the embodiment, the mounting cover 170 is provided with a second electrical component installation cavity. The second electrical component installation cavity is provided with an insertion opening. The mounting cover 170 is detachably connected with a cover 190 for covering the insertion opening, and the battery 430 is arranged in the second electrical component installation cavity. With the above structure, the battery 430 can be replaced by removing the cover 190, which is convenient for use.

[0053] In the embodiment, the mounting cover 170 is provided with mounting screws. The mounting screws pass through the cover 190 and the mounting cover 170 and are threadedly connected to the valve body 160. The mounting screws are used to fasten the cover 190 and the mounting cover 170 to the valve body 160. With the above structure, the mounting screws can fix the mounting cover 170 and the cover 190 at the same time, and the installation structure is simple.

[0054] In an embodiment, the sensor installation cavity 520 provided in the handwheel 500 has an opening to facilitate production and manufacturing. A connecting post 910 and a first semi-circular plate 920 are integrally formed and connected to the outer periphery of the mounting cover 170. One end of the connecting post 910 is connected to the mounting cover 170. The first semi-circular plate 920 is perpendicular to the connecting post 910 and is connected to the other end of the connecting post 910. The first semi-circular plate 920 is connected to a second semi-circular plate 930. The second semi-circular plate 930 and the first semi-circular plate 920 enclose and sleeved the input pipe portion 130. The second semi-circular plate 930 and the first semi-circular plate 920 form a circular outer peripheral surface. The handwheel 500 is rotatably sleeved on this circular outer peripheral surface. The first semi-circular plate 920 and the second semi-circular plate 930 cover the opening of the sensor installation cavity 520. With the above structure, by using the connecting post 910 and the first semi-circular plate 920 integrally extended from the mounting cover 170 and cooperating with the second semi-circular plate 930, on the one hand, the opening of the sensor installation cavity 520 can be blocked to form a relatively closed chamber to ensure the protection of the internal sensor; on the other hand, the structure formed by the first semi-circular plate 920 and the second semi-circular plate 930 can also rotatably support the handwheel 500, making the rotational connection of the handwheel 500 more stable; moreover, the mounting cover 170 is also connected to the valve body 160 and the input pipe portion 130 more firmly through the above structure.

[0055] In an embodiment, the connecting post 910 is provided with a relief groove, and the relief groove allows the input pipe portion 130 to enter, so that they can be more compactly matched.

[0056] In an embodiment, the first semi-circular plate 920 and the second semi-circular plate 930 can be locked by screws, or in some embodiments, a snap structure is used for mutual fixation.

[0057] In an embodiment, the threaded connection structure 600 is a threaded sleeve. One end of the threaded sleeve is connected to the handwheel 500 and rotates synchronously with the handwheel 500. The threaded sleeve is rotatably sleeved on the input pipe portion 130. In an embodiment, one end of the threaded sleeve is inserted and matched with the handwheel 500 through a non-circular head and a matching slot provided in the handwheel 500, so that the threaded sleeve can rotate synchronously with the handwheel 500. In some other embodiments, the threaded connection structure 600 can also be a threaded structure on the handwheel 500.

[0058] In an embodiment, the partition plate separating the front gas accumulation cavity 510 and the sensor installation cavity 520 on the handwheel 500 is provided with a socket hole and is rotatably sleeved on the input pipe portion 130. With the cooperation of the handwheel 500, the first semi-circular plate 920 and the second semi-circular plate 930 mentioned above, the rotation is stable.

[0059] In an embodiment, the end of the input pipe portion 130 is provided with a connecting head. The connecting head is provided with a sealing ring, and the air inlet 131 is arranged on the connecting head.

[0060] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0061] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A gas connection appliance with gas on / off and leakage detection, characterized in that, Comprising: A main body (100) provided with a gas access channel (110) and a gas output channel (120); A gas sensor (200) disposed on the main body (100) and used for detecting whether there is gas leakage; A gas on-off sensor (300) disposed on the main body (100) and used for detecting whether gas is input into the gas access channel (110); A control component (400) disposed on the main body (100), the control component (400) includes a control circuit board (410) and an alarm. The control circuit board (410) is electrically connected to the gas sensor (200) and the gas on-off sensor (300), the alarm is electrically connected to the control circuit board (410), the control circuit board (410) is provided with a controller and the controller is provided with a gas-on working mode and a monitoring working mode: after the gas on-off sensor (300) detects that gas is input, the controller enters the gas-on working mode, the controller instantaneously detects whether there is gas leakage through the gas sensor (200), and when there is gas leakage, alarms through the alarm; when no gas leakage is detected in the gas-on working mode, the controller enters the monitoring working mode, and the controller detects whether there is gas leakage through the gas sensor (200) at a predetermined frequency, and when there is gas leakage, alarms through the alarm.

2. The gas connection appliance with gas on / off and leakage detection according to claim 1, wherein: The control component (400) further includes a battery (430), and the battery (430) is disposed on the main body (100) and used for providing electrical energy to components that require electricity.

3. The gas connection appliance with gas on / off and leakage detection according to claim 1, characterized in that: The main body (100) includes an input pipe portion (130), the gas access channel (110) is disposed in the input pipe portion (130), a handwheel (500) is rotatably disposed on the input pipe portion (130), and the handwheel (500) is connected to a threaded connection structure (600) that rotates coaxially therewith; the handwheel (500) is a housing structure and rotatably sleeved on the input pipe portion (130), the end of the input pipe portion (130) is provided with an air inlet (131) communicating with the gas access channel (110), the handwheel (500) is provided with a pre-collecting gas cavity (510) and a sensor installation cavity (520), the pre-collecting gas cavity (510) corresponds to the end of the input pipe portion (130) and is disposed around the input pipe portion (130), the pre-collecting gas cavity (510) is provided with a collecting opening, the collecting opening and the air inlet (131) face the same direction, the sensor installation cavity (520) is disposed at the rear side of the pre-collecting gas cavity (510), the sensor installation cavity (520) communicates with the pre-collecting gas cavity (510), the gas sensor (200) is installed in the sensor installation cavity (520), and the handwheel (500) is provided with a first communication hole (530) communicating the sensor installation cavity (520) and the outer peripheral side position of the handwheel (500).

4. The gas connection appliance with gas on / off and leakage detection according to claim 3, characterized in that: The front gas collection chamber (510) and the sensor installation chamber (520) are separated by a partition plate, and the partition plate is provided with a plurality of second communication holes (540) arranged around the input pipe portion (130), and the front gas collection chamber (510) is connected to the sensor installation chamber (520) through the second communication holes (540).

5. The gas connection appliance with gas on / off and leakage detection according to claim 3, characterized in that: A plurality of the first communicating holes (530) are provided and arranged around the rotation axis of the hand wheel (500).

6. The gas connection appliance with gas on / off and leakage detection according to claim 3, characterized in that: The input pipe portion (130) is provided with a mounting portion (140), the gas sensor (200) is connected to the mounting circuit board (700), the mounting portion (140) is provided with a positioning column and a threaded hole, the mounting circuit board (700) is provided with a positioning hole adapted to the positioning column, and a mounting hole opposite to the threaded hole, the mounting circuit board (700) abuts against the mounting portion (140), the positioning column is inserted into the positioning hole, a fastening screw is passed through the mounting hole, the fastening screw is threadedly connected to the threaded hole and locks the mounting circuit board (700) to the mounting portion (140).

7. The gas connection appliance with gas on / off and leakage detection according to claim 1, characterized in that: The main body (100) includes an input pipe portion (130), the gas access channel (110) is arranged on the input pipe portion (130), a detection hole (150) is opened on the channel wall of the gas access channel (110), the input pipe portion (130) is provided with a tympanic membrane (810) and a fixing member (820), the tympanic membrane (810) is sealed on the outer end of the detection hole (150), the fixing member (820) is used to fix the tympanic membrane (810) to the input pipe portion (130), the gas on-off sensor (300) is a pressure sensor, and the detection end of the gas on-off sensor (300) is arranged on the side of the tympanic membrane (810) away from the detection hole (150).

8. The gas connection appliance with gas on / off and leakage detection according to claim 1, characterized in that: The main body (100) includes a valve body (160) and a mounting cover (170), wherein the mounting cover (170) is connected to the valve body (160) and encloses the valve body (160) to form a first electrical installation cavity, and the control circuit board (410) is fixedly connected to the valve body (160) and disposed in the first electrical installation cavity.

9. The gas connection appliance with gas on / off and leakage detection according to claim 8, characterized in that: The mounting cover (170) is provided with a second electrical appliance mounting cavity, the second electrical appliance mounting cavity is provided with an insertion opening, the mounting cover (170) is detachably connected to a cover (190) for covering the insertion opening, and the control component (400) further includes a battery (430) for providing electrical energy to components requiring electricity, and the battery (430) is provided in the second electrical appliance mounting cavity.

10. The gas connection appliance with gas on / off and leakage detection according to claim 9, characterized in that: The mounting cover (170) is provided with a mounting screw, which passes through the cover (190) and the mounting cover (170) and is threadedly connected to the valve body (160). The mounting screw is used to fasten the cover (190) and the mounting cover (170) to the valve body (160).

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