CN212360973U - Self-cutting-off and manually-resetting valve body - Google Patents

Abstract

The utility model discloses a self-cutting and manually-resetting valve body, which comprises a valve shell, a cutting part, a detection module, an electric control module and a hand-driven mechanism, wherein a gas transmission channel is arranged in the valve shell; the electric control module is electrically connected with the detection module and is connected with the cutting part so as to apply force to the cutting part, so that the cutting part can block the gas transmission channel; the hand-driven mechanism is arranged on the valve shell and extends into the gas transmission channel and is connected with the cut-off part, the hand-driven mechanism can drive the cut-off part to conduct the gas transmission channel when external force is applied, the rapidity of machine judgment is utilized in the design, the valve body can be quickly cut off by the machine according to measured data when abnormal conditions occur, manual participation is combined when the abnormal conditions are recovered, the judgment is more accurate, the operation is more flexible, and the safety performance is greatly improved.

Description

Self-cutting-off and manually-resetting valve body

Technical Field

The utility model relates to a gas utensil field, in particular to valve body that self-cutting and can manual reset.

Background

With the increasing popularization of intelligent control technology, the existing gas valve body also has a plurality of functions of intelligent control, for example, the existing valve body can automatically detect the working parameters of the valve body, the measurement data of environmental change parameters caused by the failure of the valve body and the like (such as the gas flow, pressure in the valve body, the change of the environmental gas concentration caused by the gas leakage and the like), then according to the measurement data, the valve body can automatically cut off the gas supply under the abnormal condition or automatically recover the gas supply after the abnormal condition disappears, however, in the actual use process, the function of self-cutting off of the valve body can really play a better effect, compared with the method that the user cuts off the valve body after perceiving the abnormal condition, the valve body has a faster response speed based on the self-cutting off of the measurement data, but the function of self-recovery is easy to cause safety accidents, because, the valve body can only rely on the measured data for judging the abnormal conditions, and in reality, the abnormal conditions which cannot be obtained by machine judgment exist, and at the moment, the subsequent safe use can be ensured only by artificial judgment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a from the valve body that cuts off and can manually reset realizes cutting off based on measured data to can manually reset, improve the security performance of using.

According to the utility model discloses a valve body of self-imposed and can manual reset of first aspect embodiment, include: the valve shell is provided with a gas transmission channel, a gas inlet respectively communicated with the outside and the gas transmission channel and a gas outlet respectively communicated with the outside and the gas transmission channel; the cutting part is movably arranged in the gas transmission channel; the detection module is used for obtaining measurement data; the electric control module is electrically connected with the detection module and is connected with the cutting part so as to apply force to the cutting part, so that the cutting part can block the gas transmission channel; and the hand driving mechanism is arranged on the valve shell and extends into the gas transmission channel to be connected with the cut-off part, and the hand driving mechanism can drive the cut-off part to conduct the gas transmission channel when external force is applied.

According to the utility model discloses from the valve body that cuts off and can manual reset, following beneficial effect has at least:

the utility model discloses a valve body, the measuring data such as working parameter when detection module detects the valve body operation or the environmental data that causes the environment to change because of the valve body trouble, judge based on the measuring data, if for the abnormal condition, the automatically controlled module orders about the cutting off part shutoff gas transmission passageway, make the gas that gets into from the air inlet can not discharge from the gas outlet, prevent the emergence of the dangerous condition that probably appears, for the user to carry out the investigation to the abnormal condition, after the maintenance, confirm that untimely again by user action hand drive mechanism outside the valve housing, by hand drive mechanism transmission to the cutting off part that is located gas transmission passageway, drive the cutting off part to switch on the gas transmission passageway, this design utilizes the rapidity of machine judgement, can be by the machine according to measuring data quick cutting off the valve body when the abnormal condition appears, and combine artifical the participation when recovering, make the judgement more accurate, the operation is more nimble, the safety performance is greatly improved.

According to some embodiments of the utility model, the gas transmission passageway includes first passageway and second passageway, the first passageway with the air inlet intercommunication, the second passageway with the gas outlet intercommunication, the first passageway with communicate through first intercommunication mouth between the second passageway, the cutting member can cover first intercommunication mouth is with the shutoff gas transmission passageway.

According to some embodiments of the present invention, the valve further comprises a limiting mechanism, the limiting mechanism is disposed on the valve housing and can act on the cut-off member to form a limiting force to a certain extent on a position of the cut-off member when covering or opening the first communication port.

According to some embodiments of the utility model, be provided with the mount pad on the valve casing, automatically controlled module includes electromagnetic component and iron core, electromagnetic component with detection module electric connection, the iron core with the cutting member is connected, be provided with in the mount pad with the guide way of gas transmission channel intercommunication, electromagnetic component sets up on the mount pad, and the iron core slides and sets up in the guide way, electromagnetic component can exert and be used for ordering about on the iron core the cutting member is close to and covers the power of first opening.

According to some embodiments of the utility model, the hand drive mechanism includes the pull rod, be provided with on the mount pad and allow the pull rod penetrates from the external world the through-hole of guide way, the pull rod with the iron core perhaps the cutting member is connected, in order to drive the cutting member is kept away from and is opened first intercommunication mouth.

According to the utility model discloses a some embodiments still include stop gear, stop gear is including setting up magnetism on the mount pad is inhaled spare and elastic component, the elastic component with the iron core perhaps the cutting part is connected in order to order about the cutting part is close to and covers first opening, magnetism is inhaled the spare and can be in the cutting part is opened adsorb during first opening the iron core.

According to the utility model discloses a some embodiments, be provided with gas pressure regulating mechanism in the first passageway, gas pressure regulating mechanism can detect the gas pressure in the first passageway and adjust the gas air input according to gas pressure.

According to the utility model discloses a some embodiments, the gas transmission passageway still includes the third passageway, the third passageway with through second intercommunication mouth intercommunication between the first passageway, the first passageway passes through the third passageway with the air inlet intercommunication, gas pressure regulating mechanism includes diaphragm, drive assembly that can change and can shelter from the piece that blocks of second intercommunication mouth, one side of diaphragm with first passageway intercommunication, the opposite side of diaphragm is provided with sealed pressurized cavity, drive assembly respectively with the diaphragm with block the piece and connect, the deformation of diaphragm can drive block and be close to or keep away from the second intercommunication mouth is in order to adjust the gas air input.

According to some embodiments of the utility model, transmission assembly includes connecting seat, swing arm and push rod, be provided with the guide in the first passageway, the connecting seat sets up on the diaphragm, thereby the connecting seat can be ordered about by the diaphragm and drive the swing arm, the swing arm with the valve casing is articulated, the push rod with the swing arm is articulated, it sets up to block the piece on the push rod, the push rod can be followed the guide is close to or keeps away from the second intercommunication mouth.

According to some embodiments of the utility model, the detection module is gas concentration sensor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of one embodiment of the valve body of the present invention;

fig. 2 is a schematic front view of one embodiment of the valve body of the present invention;

FIG. 3 is a schematic cross-sectional view of one embodiment of the valve body of the present invention;

fig. 4 is an exploded view of one embodiment of the valve body of the present invention.

Reference numerals:

the gas valve comprises a valve housing 100, a gas transmission channel 110, a gas inlet 120, a gas outlet 130, an upper valve seat 101, a lower valve cover 102, a first channel 111, a second channel 112, a third channel 113, a first communication port 140, a second communication port 150, a cutting part 200, a detection module 300, an electronic control module 400, an electromagnetic component 410, an iron core 420, a hand-drive mechanism 500, a pull rod 510, a limiting mechanism 600, a magnetic part 610, an elastic part 620, a mounting seat 700, a guide groove 710, a sealing gasket 720, a gas pressure regulating mechanism 800, a diaphragm 810, a transmission assembly 820, a connecting seat 821, a swing arm 822, a push rod 823, a blocking part 830, a pressure receiving cavity 840 and a guide part 850.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, the valve body of the embodiment of the present invention includes a valve housing 100, a cut-off member 200, a detection module 300, an electronic control module 400 and a hand driving mechanism 500, wherein a gas transmission channel 110 is disposed in the valve housing 100, the valve housing 100 is respectively connected to an air inlet 120 of the external and gas transmission channel 110 and an air outlet 130 of the external and gas transmission channel 110, as shown in fig. 4, the valve housing 100 is formed by connecting an upper valve seat 101 and a lower valve seat 102 and forms the gas transmission channel 110 therein, and an adapter member capable of being abutted to an external gas source may be disposed at the air inlet 120, and the valve housing 100 may also adopt an integrated structure in some embodiments.

As shown in fig. 2, the detection module 300 is used to obtain measurement data; automatically controlled module 400 and detection module 300 electric connection, it should be noted that, the measured data that detection module 300 detected here can have the multiple, can include the working parameter of valve body itself, the environmental change parameter that arouses because of the valve body trouble, for example, the gas flow, pressure in the valve body, cause environmental gas concentration change etc. because of the gas leakage, do not prescribe a limit to the concrete kind of detection module 300 here, in some embodiments of the utility model, detection module 300 is gas concentration sensor for detect the external gas concentration that is located near cooking utensils or valve body, thereby learn whether the gas leaks, and is concrete, at least one integration has the treater like MCU, CPU, PLC in detection module 300 and the automatically controlled module 400, can judge the analysis to the measured data that detects, and the operation of automatically controlled module 400 is controlled again.

The cutting part 200 is movably arranged in the gas transmission channel 110, the electronic control module 400 is connected with the cutting part 200 to apply force to the cutting part 200, so that the cutting part 200 can block the gas transmission channel 110, the hand driving mechanism 500 is arranged on the valve shell 100 and extends into the gas transmission channel 110 to be connected with the cutting part 200, and the hand driving mechanism 500 can drive the cutting part 200 to conduct the gas transmission channel 110 when being applied with force from the outside.

The utility model discloses a valve body, the operating parameter when detection module 300 detects the valve body operation or because of the valve body trouble leads to the measuring data such as the environmental parameter that the environment changes, judge based on the measuring data, if for abnormal conditions, electronic control module 400 orders about cutting member 200 shutoff gas transmission channel 110, make the gas that gets into from air inlet 120 can not discharge from gas outlet 130, prevent the emergence of dangerous condition that probably appears, after the user examines abnormal conditions, maintains, confirm that untimely by the user again act on the hand drive mechanism 500 that is located the valve body 100 outside, drive cutting member 200 that is located gas transmission channel 110 by hand drive mechanism 500 transmission, drive cutting member 200 in order to switch on gas transmission channel 110, this design utilizes the rapidity that the machine judged, can be by the machine according to the measuring data quick cut off valve body when abnormal conditions appear, and combine artifical the participation when resumeing, the judgment is more accurate, the operation is more flexible, and the safety performance is greatly improved.

In some embodiments of the present invention, as shown in fig. 3, the gas transmission channel 110 includes a first channel 111 and a second channel 112, the first channel 111 is communicated with the gas inlet 120, the second channel 112 is communicated with the gas outlet 130, the first channel 111 is communicated with the second channel 112 through a first communication port 140, the cutting member 200 can cover the first communication port 140 to block the gas transmission channel 110, wherein the cutting member 200 can be a soft gasket, the first communication port 140 can protrude from an inner wall surface of the gas transmission channel 110, or a step portion is provided at an edge of the first communication port 140, so that the soft gasket covers the gas transmission channel, and the cutting effect is improved.

In some embodiments of the utility model, still include stop gear 600, stop gear 600 sets up on valve casing 100 and can act on cutting member 200 to form the restrictive force of certain degree to cutting member 200 in the position when hiding or opening first communication opening 140, stop gear 600 can further inject cutting member 200 to the off-state or the open mode of gas transmission channel 110, prevents under the effect of external force, the condition of spurious triggering appears.

Specifically, the electronic control module 400 has various embodiments, wherein, in some embodiments of the present invention, as shown in fig. 3 and 4, a mounting seat 700 is disposed on the valve housing 100, an opening is disposed on the valve housing 100, the mounting seat 700 is connected with the valve housing 100 and seals the opening, the electronic control module 400 includes an electromagnetic component 410 and an iron core 420, the electromagnetic component 410 is electrically connected with the detection module 300, the iron core 420 is connected with the cutting member 200, a guide groove 710 is disposed in the mounting seat 700 and is communicated with the gas transmission channel 110, the electromagnetic component 410 is disposed on the mounting seat 700, and the iron core 420 is slidably disposed in the guide groove 710, the electromagnetic component 410 can apply a force on the iron core 420 for driving the cutting member 200 to be close to the first communication opening 140, it should be noted that the electromagnetic component 410 can be an electromagnetic coil or a magnetic core wound by an electromagnetic winding, and the iron core 420 is not limited to be made of iron, the iron core 420 is an object which can be driven to move after the electromagnetic component 410 generates magnetic force, and the iron core 420 may also be made of silicon steel or other materials, and when the electromagnetic component 410 is powered on, the magnetic force is generated on the iron core 420 to drive the cutting member 200 to be close to the first communication port 140, so as to cover the first communication port 140.

In some embodiments of the present invention, the hand driving mechanism 500 includes the pull rod 510, and combines the structure of the above-mentioned mounting seat 700 and the electronic control module 400, so as to further optimize, a through hole allowing the pull rod 510 to penetrate into the guiding groove 710 from the outside can be provided on the mounting seat 700, the pull rod 510 is connected with the iron core 420 or the cutting member 200, so as to drive the cutting member 200 to be away from the opening of the first communicating opening 140, and the user lifts the pull rod 510, and then the cutting member 200 can be driven to be away from the first communicating opening 140, thereby conducting the gas transmission channel 110.

In some embodiments of the present invention, the mounting base 700, the electronic control module 400, the hand driving mechanism 500 and the limiting mechanism 600 in some embodiments provided above are combined, the limiting mechanism 600 may include a magnetic attraction member 610 and an elastic member 620 disposed on the mounting base 700, the elastic member 620 is connected to the iron core 420 or the cutting member 200 to drive the cutting member 200 to approach and cover the first communication opening 140, the magnetic attraction member 610 can attract the iron core 420 when the cutting member 200 opens the first communication opening 140, wherein in this embodiment, the elastic member 620 may be a spring or an elastic rubber column, the magnetic attraction member 610 may be a magnet, and the magnetic attraction member 610 may be disposed at the bottom of the guide groove 710; in some embodiments, if a simple change is performed, the elastic member 620 may be connected to the core 420 or the cutting member 200 to drive the cutting member 200 away from the first communication opening 140, and the magnetic member 610 may attract the core 420 when the cutting member 200 covers the first communication opening 140.

It should be noted that, good sealing performance is required between the mounting seat 700 and the guide groove 710 and the first channel 111, as shown in fig. 3, a sealing gasket 720 is required to be disposed at a connection position of the mounting seat 700 and the opening of the valve housing 100 and a communication position of the guide groove 710 and the first channel 111, a hole is disposed on the sealing gasket 720 to allow the iron core 420 or the cutting element 200 to pass through, and an inner side wall of the hole of the sealing gasket 720 is in sliding fit with an outer side wall of the iron core 420 or the cutting element 200, and in some embodiments, one end of the elastic element 620 is disposed on the sealing gasket 720, and the other end is in contact with the cutting element 200.

As shown in fig. 3, when in use, the air inlet 120 of the valve body is connected to an air source, the air outlet 130 is connected to an external cooker, a user lifts the pull rod 510, the cutting member 200 presses against the elastic member 620, the magnetic member 610 is attracted to the iron core 420, at this time, the attraction force of the magnetic member 610 to the iron core 420 is greater than the elastic force of the elastic member 620, the detection unit detects that the electromagnetic unit 410 is in a normal condition, the electromagnetic unit 410 does not apply force to the iron core 420, at this time, the cutting member 200 leaves the first communication port 140, the air delivery channel 110 is in a conduction state, when the detection unit detects that the parameter is abnormal, the signal trigger of the detection unit is received, the electromagnetic unit 410 applies force to the iron core 420, the elastic force applied by the elastic member 620 applied by the electromagnetic unit 410 to the iron core 420 is greater than the attraction force of the magnetic member 610, the magnetic member 610 is separated from the iron core 420, the, at this time, since the magnetic attraction element 610 is separated from the iron core 420 by a certain distance, the magnetic attraction force of the magnetic attraction element 610 to the iron core 420 is smaller than the elastic force of the elastic element 620, and the electromagnetic element 410 can no longer apply a force to the iron core 420.

In some embodiments of the present invention, as shown in fig. 3 and 4, a gas pressure regulating mechanism 800 is disposed in the first channel 111, and the gas pressure regulating mechanism 800 can detect the gas pressure in the first channel 111 and regulate the gas intake amount according to the gas pressure.

Specifically, the gas transmission channel 110 further includes a third channel 113, the third channel 113 is communicated with the first channel 111 through a second communication port 150, the first channel 111 is communicated with the gas inlet 120 through the third channel 113, the gas pressure regulating mechanism 800 includes a deformable diaphragm 810, a transmission assembly 820 and a blocking member 830 capable of blocking the second communication port 150, one side of the diaphragm 810 is communicated with the first channel 111, the other side of the diaphragm 810 is provided with a sealed pressure receiving cavity 840, the transmission assembly 820 is respectively connected with the diaphragm 810 and the blocking member 830, and deformation of the diaphragm 810 can drive the blocking member 830 to approach or be away from the second communication port 150 to regulate gas inflow.

The blocking member 830 may be a soft gasket or a stopper, and is closer to the second communicating port 150 to block the flow of the gas, so as to adjust the gas inflow, the diaphragm 810 may be an adhesive film or a metal film, and the diaphragm 810 is specifically provided with a plurality of modes, for example, as shown in fig. 3, the edge of the diaphragm 810 may be connected to the inner wall of the lower valve cover 102, the lower side of the diaphragm 810 is a sealed pressure chamber 840, and the upper side of the diaphragm 810 is the first channel 111, when the gas pressure in the first channel 111 is high, the diaphragm 810 may be recessed toward the pressure chamber 840, and the pressure chamber 840 is pressed, and the transmission assembly 820 may sense the deformation of the diaphragm 810, so as to drive the blocking member 830 to be close to the second communicating port 150, so as to reduce the gas inflow, so that the gas pressure in the first channel 111 is normal, and of course, the diaphragm 810 may also form the pressure chamber 840 by self.

Specifically, in some embodiments of the present invention, the transmission assembly 820 includes a connecting seat 821, a swing arm, and a push rod 823, a guide 850 is provided in the first channel 111, the connecting seat 821 is provided on the diaphragm 810, the connecting seat 821 can be driven by the diaphragm 810 to drive the swing arm, the swing arm is hinged to the valve housing 100, the push rod 823 is hinged to the swing arm, the blocking member 830 is provided on the push rod 823, and the push rod 823 can be close to or away from the second communicating opening 150 along the guide 850.

The connecting base 821 is inserted into the diaphragm 810, wherein a sealing structure is required to be arranged at the connecting position of the connecting base 821 and the diaphragm 810 to ensure that the pressure chamber 840 keeps sealed and is isolated from the first channel 111, a socket is arranged on the connecting base 821, one end of the swing arm is inserted into the socket, a gap capable of moving is arranged in the socket at one end of the swing arm, and the guide part 850 can be a convex rib arranged in the first channel 111 or directly the inner wall surface of the first channel 111 to guide the moving direction of the push rod 823; as shown in fig. 3, when the air pressure of the first channel 111 is too high, the diaphragm 810 is sunken towards the pressure receiving cavity 840, and the swing arm swings, the push rod 823 can be pushed forward, so that the blocking piece 830 at the front end of the push rod 823 is close to the second communicating port 150 to block the inflow of the fuel gas and reduce the fuel gas inflow.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A self-cutting and manually resettable valve body, comprising:

the valve shell is provided with a gas transmission channel, a gas inlet respectively communicated with the outside and the gas transmission channel and a gas outlet respectively communicated with the outside and the gas transmission channel;

the cutting part is movably arranged in the gas transmission channel;

the detection module is used for obtaining measurement data;

the electric control module is electrically connected with the detection module and is connected with the cutting part so as to apply force to the cutting part, so that the cutting part can block the gas transmission channel;

and the hand driving mechanism is arranged on the valve shell and extends into the gas transmission channel to be connected with the cut-off part, and the hand driving mechanism can drive the cut-off part to conduct the gas transmission channel when external force is applied.

2. A self-cutting and manually resettable valve body as claimed in claim 1, wherein: the gas transmission channel comprises a first channel and a second channel, the first channel is communicated with the gas inlet, the second channel is communicated with the gas outlet, the first channel is communicated with the second channel through a first communication port, and the cutting part can cover the first communication port to seal the gas transmission channel.

3. A self-cutting and manually resettable valve body as claimed in claim 2, wherein: the valve further comprises a limiting mechanism which is arranged on the valve shell and can act on the cutting-off part so as to form a certain limiting force on the position of the cutting-off part when the first communication port is covered or opened.

4. A self-cutting and manually resettable valve body as claimed in claim 2, wherein: the valve shell is provided with a mounting seat, the electric control module comprises an electromagnetic component and an iron core, the electromagnetic component is electrically connected with the detection module, the iron core is connected with the cutting part, a guide groove communicated with the gas transmission channel is formed in the mounting seat, the electromagnetic component is arranged on the mounting seat, the iron core slides and is arranged in the guide groove, and the electromagnetic component can be applied to the iron core and used for driving the cutting part to be close to and cover the force of the first communication port.

5. A self-cutting and manually resettable valve body as claimed in claim 4, wherein: the hand-driven mechanism comprises a pull rod, a through hole allowing the pull rod to penetrate into the guide groove from the outside is formed in the mounting seat, the pull rod is connected with the iron core or the cutting part, and the cutting part can be driven to be far away from and opened from the first communication hole.

6. A self-cutting and manually resettable valve body as claimed in claim 5, wherein: still include stop gear, stop gear is including setting up magnetism on the mount pad is inhaled piece and elastic component, the elastic component with the iron core perhaps the cutting part is connected in order to order about the cutting part is close to and covers first communication port, magnetism is inhaled the piece and can be in the cutting part is opened adsorb when first communication port the iron core.

7. A self-cutting and manually resettable valve body as claimed in claim 2, wherein: be provided with gas pressure regulating mechanism in the first passageway, gas pressure regulating mechanism can detect the gas pressure in the first passageway and adjust the gas air input according to gas pressure.

8. A self-cutting and manually resettable valve body as claimed in claim 7, wherein: the gas transmission channel further comprises a third channel, the third channel is communicated with the first channel through a second communicating port, the first channel is communicated with the gas inlet through the third channel, the gas pressure regulating mechanism comprises a deformable membrane, a transmission assembly and a blocking piece capable of blocking the second communicating port, one side of the membrane is communicated with the first channel, a sealed pressure cavity is arranged on the other side of the membrane, the transmission assembly is respectively connected with the membrane and the blocking piece, and the deformation of the membrane can drive the blocking piece to be close to or far away from the second communicating port so as to regulate the gas inflow.

9. A self-cutting and manually resettable valve body as claimed in claim 8, wherein: the transmission assembly comprises a connecting seat, a swing arm and a push rod, a guide part is arranged in the first channel, the connecting seat is arranged on the diaphragm, the connecting seat can be driven by the diaphragm to drive the swing arm, the swing arm is hinged to the valve shell, the push rod is hinged to the swing arm, the blocking part is arranged on the push rod, and the push rod can be close to or far away from the second communicating port along the guide part.

10. A self-cutting and manually resettable valve body as claimed in claim 1, wherein: the detection module is a gas concentration sensor.

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