CN114951907B

CN114951907B - Protective welding monitoring alarm device and use method

Info

Publication number: CN114951907B
Application number: CN202210423033.1A
Authority: CN
Inventors: 李永磊; 陈志农; 吴胜雨; 施洪亮; 徐鹏飞; 肖亮; 洪亮; 毛伟
Original assignee: Jiangnan Shipyard Group Co Ltd
Current assignee: Jiangnan Shipyard Group Co Ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2023-10-17
Anticipated expiration: 2042-04-21
Also published as: CN114951907A

Abstract

The application provides a protective welding monitoring alarm device and a use method thereof, wherein an air inlet assembly of the alarm device comprises an air inlet pipe, a monitoring cabin and an exhaust base which are connected with each other, a magnet is arranged in the monitoring cabin, the magnet is connected with a spring to provide the spring force for the magnet to face the air inlet pipe, a reed pipe is accommodated in the side wall of the monitoring cabin, and a first exhaust hole is formed in the side wall of the monitoring cabin; the exhaust base is provided with a second exhaust hole communicated with the first exhaust hole. The protective gas enters the pipeline through the air inlet pipe, the air chamber and the first exhaust hole and finally reaches the welding position at the other end of the pipeline. When the nitrogen gas passes through the gas inlet pipe, the magnet is pushed to move rightwards, the spring is compressed at the moment, the magnet is far away from the reed pipe, the reed pipe is disconnected, and the circuit is in a disconnected state at the moment; when the nitrogen pressure through the air inlet pipe is lower, the thrust of the gas pushing magnet is smaller than the elastic force of the spring, the magnet moves leftwards to be close to the reed pipe, the reed pipe is connected, the circuit is in a connection state, and the alarm unit works to prompt a constructor.

Description

Protective welding monitoring alarm device and use method

Technical Field

The application relates to the technical field of welding, in particular to a protective welding monitoring alarm device and a use method thereof.

Background

In operation, electric welding belongs to a special work class, and the welding requirements of some working posts are higher, even some working posts can be checked by shooting, bubbles and oxidization cannot occur, argon is required to be filled in during welding in argon arc welding, so that the welding machine has a protective effect and can be prevented from being oxidized. The argon arc welding is a welding technology which is based on the principle of common electric welding, utilizes the inertia of argon to protect a metal welding material, melts the welding material into a liquid state on a welded base material through high current to form a molten pool, and enables the welded metal and the welding material to achieve metallurgical bonding. Making the welded pipe appear smoother and more attractive.

The content of argon can not accomplish real-time supervision argon gas in ordinary argon arc welding, when argon gas bottle argon gas pressure is lower, can cause the shielding gas argon gas to weld the content greatly reduced when, can cause when argon gas bottle pressure is low enough to weld the argon gas protection. Greatly reduces the protection and is easy to cause oxidation.

Therefore, an alarm device is required to be provided for monitoring the content and the pressure of argon gas in real time during welding, and can timely and effectively remind constructors of the content of the argon gas in the welding process, so that the oxidation caused by the lower content of the argon gas in the welding process is prevented.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present application provides a protection welding monitoring alarm device, comprising:

the air inlet assembly comprises an air inlet pipe and a monitoring cabin which are connected with each other, wherein a magnet capable of moving along the length direction is arranged in the monitoring cabin, an elastic part is connected with the magnet to provide the magnet with elastic force towards the air inlet pipe, the magnet and the end face of the monitoring cabin jointly enclose an air chamber communicated with the air inlet pipe, a reed pipe is accommodated in the side wall of the monitoring cabin, and a plurality of first exhaust holes which are arranged along the length direction and communicated with the air chamber are formed in the monitoring cabin;

the choke plug, the lateral wall of choke plug and the inner wall of pipeline form sealing contact, the intake pipe of air inlet subassembly runs through the choke plug and towards the outside of pipeline, install on the choke plug the alarm unit that tongue tube electricity is connected, protection gas is through intake pipe, air chamber and first exhaust hole entering in the pipeline.

Preferably, the monitoring cabin is further connected with an exhaust base, and the exhaust base is provided with a plurality of second exhaust holes which are arranged along the length direction and are communicated with the first exhaust holes; the magnet is installed in the magnet base, one end of the spring is connected to the magnet base, and the other end of the spring is placed in the spring fixing hole of the exhaust base.

Preferably, the side wall of the monitoring cabin is provided with a reed pipe fixing hole for accommodating the reed pipe, and the exhaust base is provided with a through bolt hole communicated with the reed pipe fixing hole for installing an adjusting bolt, so that the depth position of the reed pipe in the reed pipe fixing hole is adjusted through the adjusting bolt.

Preferably, the plug base comprises a top wall, an inner ring side wall and an outer ring side wall, and the end part of the pipeline is inserted into a ring groove formed by the inner ring side wall and the outer ring side wall.

Preferably, the choke plug is in a truncated cone shape and is arranged in the inner ring side wall, one end of the choke plug with smaller diameter faces the outside of the pipeline, the air inlet pipe also penetrates through the choke plug base, a butterfly nut is sleeved on the part of the air inlet pipe, which is positioned outside the choke plug base, and the choke plug is moved by screwing the butterfly nut so as to force the inner ring side wall to be abutted against the inner wall of the pipeline to form sealing contact.

Preferably, the choke plug base is provided with a charging interface, a power switch and the alarm unit; the alarm unit comprises a buzzer and an indicator lamp, and a dry battery is arranged in the choke plug; the buzzer and the indicator lamp in the choke plug base face to the outside of the pipeline, and the buzzer and the indicator lamp in the choke plug face to the inside of the pipeline.

Preferably, a buzzer and an indicator light in the choke plug base are connected in parallel with the buzzer and the indicator light in the choke plug, and then connected in series with the power switch and the reed switch.

Preferably, the bulkhead is further provided with a reed pipe winding displacement hole and a fixing hole for accommodating the monitoring cabin.

The application also provides a use method of the alarm device, which comprises the following steps:

after the alarm device is reliably connected with the pipeline, the air inlet pipe is connected with the nitrogen cylinder, and nitrogen flows through the air inlet pipe, the air chamber, the first exhaust hole and the second exhaust hole to enter the pipeline, and finally reaches the welding position at the other end of the pipeline;

when the required nitrogen pressure is high, the depth of the reed pipe inserted into the reed pipe fixing hole is high, so that the reed pipe is close to the magnet as much as possible; when the required nitrogen pressure is smaller, the depth of the reed pipe inserted into the reed pipe fixing hole is shallower, so that the reed pipe is far away from the magnet as far as possible.

Preferably, the spring force of the spring is adjusted to adjust the required nitrogen pressure, and the method specifically comprises the following steps:

when the required nitrogen pressure is high, the elasticity of the spring is increased; when the required nitrogen pressure is small, the elastic force of the spring is reduced.

As described above, the application provides a protective welding monitoring alarm device and a use method thereof, wherein an air inlet component of the alarm device comprises an air inlet pipe and a monitoring cabin which are connected with each other, a magnet is arranged in the monitoring cabin, the magnet is connected with a spring to provide the spring force for the magnet to face the air inlet pipe, a reed pipe is accommodated in the side wall of the monitoring cabin, and a first air outlet hole is formed at the same time; the monitoring cabin is connected with the exhaust base, and the exhaust base is opened there is the second exhaust hole with first exhaust hole intercommunication. The protective gas enters the pipeline through the air inlet pipe, the air chamber and the first exhaust hole and finally reaches the welding position at the other end of the pipeline. When the nitrogen gas feeding device is used, the air inlet pipe is connected with the nitrogen gas bottle, when nitrogen gas passes through the air inlet pipe, the magnet is pushed to move rightwards, the spring is compressed at the moment, the magnet is far away from the reed switch, the reed switch is disconnected, the circuit is in a disconnected state, and the alarm unit does not work; when the nitrogen pressure in the bottle is too low, the nitrogen pressure through the air inlet pipe is low, the thrust of the gas pushing magnet is smaller than the elastic force of the spring, the magnet moves leftwards to be close to the reed switch, the reed switch is connected, the circuit is in a connected state, and the alarm unit works to prompt a constructor.

Drawings

Fig. 1 shows a schematic structure of an alarm device in the present application.

Fig. 2 is a schematic structural view of a bulkhead base according to the present application.

Fig. 3 shows a schematic structure of a bulkhead according to the present application.

Fig. 4 is a schematic view of the structure of the air intake assembly according to the present application.

Fig. 5 is a schematic diagram showing a cross-sectional structure along AA and BB in fig. 4.

Fig. 6 is a schematic diagram showing the circuit connection of the alarm device in the present application.

Description of element reference numerals

1. Plug base 34 locking bolt hole

2. Choke plug 35 magnet base

3. Air intake assembly 36 magnet

4. Exhaust base 37 spring

5. Butterfly nut for pipeline 38

11. Reed switch of charging interface 39

12. Second exhaust hole of power switch 41

13. The indicator lamp 42 penetrates through the bolt hole

14. Buzzer 43 spring fixing hole

21. Indicating lamp 44 locking bolt hole

22. Buzzer 301 air inlet pipe

23. Dry battery 302 monitoring cabin

24. Top wall of fixing hole 101

25. Inner ring side wall of reed pipe row line hole 102

32. Outer ring side wall of reed pipe fixing hole 103

33. First exhaust hole

Detailed Description

Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application.

As described in detail in the embodiments of the present application, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of explanation, and the schematic drawings are only examples, which should not limit the scope of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For ease of description, spatially relative terms such as "under", "below", "beneath", "above", "upper" and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Furthermore, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more intervening layers may also be present. As used herein, "between … …" is meant to include both endpoints.

In the context of the present application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, as well as embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complex.

As shown in fig. 1, this embodiment provides a protection welding monitoring alarm device, including:

the air inlet assembly 3, as shown in fig. 4, comprises an air inlet pipe 301 and a monitoring cabin 302 which are connected with each other, wherein a magnet 36 capable of moving along the length direction is arranged in the monitoring cabin 302, an elastic component is connected with the magnet 36 to provide elastic force for the magnet 36 towards the air inlet pipe 301, the magnet 36 and the end surface of the monitoring cabin 302 jointly enclose an air chamber communicated with the air inlet pipe 301, the side wall of the monitoring cabin 302 is provided with a reed switch 39, and a plurality of first air exhaust holes 33 which are arranged along the length direction and communicated with the air chamber are formed in the side wall of the monitoring cabin 302;

the choke plug 2, the sidewall of the choke plug 2 forms the sealed contact with inner wall of the pipeline 5, the air inlet 301 of the air inlet assembly 3 runs through the choke plug 2 and faces the outside of the pipeline 5, install the alarm unit that the said reed switch 39 connects electrically on the choke plug 2, the protective gas enters the said pipeline 5 through the air inlet 301, air chamber and the first exhaust hole 33.

As shown in fig. 2, the bulkhead base 1 includes a top wall 101, an inner ring side wall 102, and an outer ring side wall 103, and the end of the pipe 5 is inserted into a ring groove formed by the inner ring side wall 102 and the outer ring side wall 103.

Further, the choke plug 2 is in a truncated cone shape and is mounted in the inner ring side wall 102, one end of the choke plug 2 with a smaller diameter faces the outside of the pipeline 5, the air inlet pipe 301 also penetrates through the choke plug base 1, a butterfly nut 38 is sleeved on the part of the air inlet pipe 301 located outside the choke plug base 1, and the choke plug 2 is moved by tightening the butterfly nut 38 so as to force the inner ring side wall 102 to abut against the inner wall of the pipeline 5 to form sealing contact.

Further, as shown in fig. 3, the bulkhead 2 is further provided with a reed wire hole 25 and a fixing hole 24 for accommodating the monitoring cabin 302.

Further, the monitoring cabin 302 is further connected with an exhaust base 4, and the exhaust base 4 is provided with a plurality of second exhaust holes 41 which are arranged along the length direction and are communicated with the first exhaust holes 33. Specifically, as shown in fig. 5, the monitoring compartment 302 is provided with a locking bolt hole 34, and the exhaust base 4 is provided with a locking bolt hole 44, so that the monitoring compartment 302 and the exhaust base 4 are connected by a screw. Preferably, the number of the first air vents 33 and the second air vents 41 is 4, and the first air vents and the second air vents 41 are symmetrically distributed.

Further, the magnet 36 is mounted in the magnet base 35, the magnet base 35 is connected to one end of the spring 37, and the other end of the spring 37 is placed in the spring fixing hole 43 of the exhaust base 4.

Further, a reed pipe fixing hole 32 is formed in the side wall of the monitoring cabin 302 to accommodate the reed pipe 39, and a through bolt hole 42 communicating with the reed pipe fixing hole 32 is formed in the exhaust base 4 to install an adjusting bolt, so that the depth position of the reed pipe 39 in the reed pipe fixing hole 32 is adjusted.

Further, a charging interface 11, a power switch 12 and the alarm unit are arranged on the choke plug base 1, and the alarm unit comprises a buzzer 14 and an indicator lamp 13. The choke plug 2 is provided with a dry battery 23, and the alarm unit in the choke plug 2 comprises a buzzer 22 and an indicator lamp 21. The buzzer 14 and the indicator lamp 13 in the choke plug base 1 face the outside of the pipeline 5, and the buzzer 22 and the indicator lamp 21 in the choke plug 2 face the inside of the pipeline 5. As shown in fig. 6, the power switch 12, the reed switch 39, and the alarm unit are connected in series, and the buzzer 14 and the indicator lamp 13 in the bulkhead base 1 are connected in parallel with the buzzer 22 and the indicator lamp 21 in the bulkhead 2.

The working process of the alarm device is as follows: after the installation of each component is completed, the air inlet pipe 301 is connected with the nitrogen cylinder, the power switch 12 on the gas cylinder valve and the choke plug base 1 is opened, when protective gas (such as nitrogen) passes through the air inlet pipe 301, the magnet 36 and the magnet base 35 are pushed to move rightwards, the spring 37 is compressed at the moment, the magnet 36 is far away from the reed switch 39, the reed switch 39 is disconnected, the circuit is in a disconnected state, and the indicator lamp and the buzzer do not work. When the nitrogen pressure in the bottle is too low, the nitrogen pressure through the air inlet pipe 301 is low, at the moment, the thrust of the air pushing magnet 36 and the magnet base 35 is smaller than the elastic force of the spring 37, the magnet base 35 moves leftwards under the elastic force of the spring 37, when the magnet 36 is close to the reed switch 39, the reed switch 39 is switched on, the circuit is in the on state, the indicator lamp and the buzzer are in the working state, and the indicator lamp flashes to sound. The constructor is prompted that the nitrogen pressure in the pipeline is lower, and the nitrogen pressure is increased by the ventilation bottle.

The alarm device uses two groups of indicator lamps and a buzzer, the outside of the pipeline is convenient for a guardian beside the prompting device, and the inside of the pipeline can utilize the pipeline to transmit sound and light to prompt a constructor at the far position or at the other end of the pipeline. The design can enable a constructor to find an alarm in time, and can be independently operated by one person under the condition of insufficient personnel, so that the personnel are saved, and the labor efficiency is improved. The elastic member is not limited to the spring in the above embodiment, and may be, for example, a rubber band or the like, as long as the elastic force of the magnet 36 toward the intake pipe 301 can be provided. The pipe 5 is a pipe to be welded, one end of the pipe is provided with an alarm device, the other end is a welding position, and the protective gas enters the pipe 5 through the gas inlet pipe 301, the gas chamber, the first gas outlet hole 33 and the second gas outlet hole 41 and finally reaches the welding position of the other end.

The specific required working nitrogen pressure and flow rate of the alarm device can be adjusted by adjusting the depth of the reed pipe 39 inserted into the reed pipe fixing hole 32 through the adjusting bolt in the bolt hole 42. The specific adjusting method comprises the following steps: when the required nitrogen pressure is high, the depth of the reed switch 39 inserted into the reed switch fixing hole 32 is high, namely the reed switch is as close to the magnet 36 as possible, when the nitrogen pressure is slightly reduced in use, the operation requirement is considered to be met, and at the moment, the magnet slightly moves leftwards to be close to the reed switch 39 so as to lead the reed switch 39 to be conducted, and an alarm is generated immediately; similarly, when the required nitrogen pressure is small, reed switch 39 is inserted into reed switch fixing hole 32 to a shallower depth, i.e., as far away from magnet 36 as possible; the specific insertion depth is required to be adjusted according to the nitrogen pressure value required by the present place. The depth of the reed pipe 39 inserted into the reed pipe fixing hole 32 is adjusted by the screwing depth of the adjusting bolt penetrating through the bolt hole 42, so that the alarm pressure and the flow are adjusted, the alarm value required by the user is achieved, the nitrogen pressure can be accurately monitored in real time, and the resource waste caused by overlarge nitrogen pressure is avoided; and meanwhile, the condition that the alarm pressure value is unstable and inaccurate due to the fact that the reed switch 39 moves back and forth in the reed switch fixing hole 32 is also prevented.

In addition, the adjustment can also be performed by adjusting the elastic force of the spring 37, specifically: when the required nitrogen pressure is high, the elasticity of the spring 37 is increased, so that the magnet 36 can be kept away from the reed pipe 39 only under high pressure, and the off state is maintained; similarly, when the required nitrogen pressure is small, the elastic force of the spring 37 can be reduced.

The embodiment also provides a use method of the alarm device, which specifically comprises the following steps:

after the alarm device is reliably connected with the pipeline 5, the air inlet pipe 301 is connected with a nitrogen cylinder, and nitrogen flows through the air inlet pipe 301, the air chamber, the first air outlet hole 33 and the second air outlet hole 41 to enter the pipeline 5, and finally reaches the welding position at the other end of the pipeline 5.

When nitrogen passes through the air inlet pipe 301, the magnet 36 and the magnet base 35 are pushed to move rightwards, the spring 37 is compressed at the moment, the magnet 36 is far away from the reed pipe 39, the reed pipe 39 is disconnected, the circuit is in a disconnected state, and the indicator lamp and the buzzer do not work. When the nitrogen pressure in the bottle is too low, the nitrogen pressure through the air inlet pipe 301 is low, at the moment, the thrust of the air pushing magnet 36 and the magnet base 35 is smaller than the elastic force of the spring 37, the magnet base 35 moves leftwards under the elastic force of the spring 37, when the magnet 36 is close to the reed switch 39, the reed switch 39 is switched on, the circuit is in the on state, the indicator lamp and the buzzer are in the working state, and the indicator lamp flashes to sound.

The required working nitrogen pressure and flow rate are adjusted by adjusting the depth of insertion of the reed pipe 39 into the reed pipe fixing hole 32 through an adjusting bolt in the bolt hole 42, or by adjusting the elastic force of the adjusting spring 37. The specific adjusting method comprises the following steps:

when the required nitrogen pressure is high, the depth of the reed switch 39 inserted into the reed switch fixing hole 32 is high, namely the reed switch is as close to the magnet 36 as possible, when the nitrogen pressure is slightly reduced in use, the operation requirement is considered to be met, and at the moment, the magnet slightly moves leftwards to be close to the reed switch 39 so as to lead the reed switch 39 to be conducted, and an alarm is generated immediately; similarly, when the required nitrogen pressure is small, reed switch 39 is inserted into reed switch fixing hole 32 to a shallower depth, i.e., as far away from magnet 36 as possible; the specific insertion depth is required to be adjusted according to the nitrogen pressure value required by the present place. The depth of the reed pipe 39 inserted into the reed pipe fixing hole 32 is adjusted by the screwing depth of the adjusting bolt penetrating through the bolt hole 42, so that the alarm pressure and the flow are adjusted, the alarm value required by the user is achieved, the nitrogen pressure can be accurately monitored in real time, and the resource waste caused by overlarge nitrogen pressure is avoided; and meanwhile, the condition that the alarm pressure value is unstable and inaccurate due to the fact that the reed switch 39 moves back and forth in the reed switch fixing hole 32 is also prevented.

In summary, the application provides a protective welding monitoring alarm device and a use method thereof, wherein an air inlet assembly of the alarm device comprises an air inlet pipe and a monitoring cabin which are connected with each other, a magnet is arranged in the monitoring cabin, the magnet is connected with a spring to provide elasticity for the magnet towards the air inlet pipe, a reed pipe is accommodated in the side wall of the monitoring cabin, and a first exhaust hole is formed at the same time; the monitoring cabin is connected with the exhaust base, and the exhaust base is opened there is the second exhaust hole with first exhaust hole intercommunication. The protective gas enters the pipeline through the air inlet pipe, the air chamber and the first exhaust hole and finally reaches the welding position at the other end of the pipeline. When the nitrogen gas feeding device is used, the air inlet pipe is connected with the nitrogen gas bottle, when nitrogen gas passes through the air inlet pipe, the magnet is pushed to move rightwards, the spring is compressed at the moment, the magnet is far away from the reed switch, the reed switch is disconnected, the circuit is in a disconnected state, and the alarm unit does not work; when the nitrogen pressure in the bottle is too low, the nitrogen pressure through the air inlet pipe is low, the thrust of the gas pushing magnet is smaller than the elastic force of the spring, the magnet moves leftwards to be close to the reed switch, the reed switch is connected, the circuit is in a connected state, and the alarm unit works to prompt a constructor.

The warning device is simple in structure, low in manufacturing cost and easy to popularize, can monitor the pressure and flow of nitrogen in the welding pipe in real time, can timely and accurately remind a constructor of the content of the nitrogen in the pipe, ensures that the pipe is internally provided with enough nitrogen, and prevents welding oxidation caused by less nitrogen. The qualification rate of the welding workpieces of constructors is improved, the production efficiency is improved, the waste return rate is reduced, the qualification rate is ensured, and the production cost is saved.

The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A shielded welding monitoring alarm device, comprising:

the choke plug, the sidewall of the choke plug forms the sealed contact with inner wall of the pipeline, the air inlet pipe of the said air inlet assembly runs through the said choke plug and faces the outside of the said pipeline, mount the alarm unit that the said reed switch connects electrically on the said choke plug, the protective gas enters the said pipeline through air inlet pipe, air chamber and the first exhaust hole;

the choke plug base comprises a top wall, an inner ring side wall and an outer ring side wall, and the end part of the pipeline is inserted into a ring groove formed by the inner ring side wall and the outer ring side wall; the choke plug is in a truncated cone shape and is arranged in the inner ring side wall, one end of the choke plug with smaller diameter faces the outside of the pipeline, the air inlet pipe also penetrates through the choke plug base, a butterfly nut is sleeved on the part of the air inlet pipe, which is positioned outside the choke plug base, and the choke plug is moved by tightening the butterfly nut so as to force the inner ring side wall to abut against the inner wall of the pipeline to form sealing contact.

2. The alarm device of claim 1, wherein:

the monitoring cabin is also connected with an exhaust base, and the exhaust base is provided with a plurality of second exhaust holes which are arranged along the length direction and are communicated with the first exhaust holes; the magnet is installed in the magnet base, one end of the spring is connected to the magnet base, and the other end of the spring is placed in the spring fixing hole of the exhaust base.

3. An alarm device according to claim 2, wherein:

the side wall of the monitoring cabin is provided with a reed pipe fixing hole for accommodating the reed pipe, and the exhaust base is provided with a penetrating bolt hole communicated with the reed pipe fixing hole for installing an adjusting bolt, so that the depth position of the reed pipe in the reed pipe fixing hole is adjusted through the adjusting bolt.

4. The alarm device according to claim 1, wherein a charging interface, a power switch and the alarm unit are provided on the bulkhead base; the alarm unit comprises a buzzer and an indicator lamp, and a dry battery is arranged in the choke plug; the buzzer and the indicator lamp in the choke plug base face to the outside of the pipeline, and the buzzer and the indicator lamp in the choke plug face to the inside of the pipeline.

5. The alarm device of claim 4, wherein a buzzer and an indicator light in the bulkhead base are connected in parallel with the buzzer and the indicator light in the bulkhead and then connected in series with the power switch and the reed switch.

6. The alarm device of claim 1, wherein the bulkhead is further provided with a reed pipe winding displacement hole and a fixing hole for accommodating the monitoring cabin.

7. A method of using an alarm device according to any one of claims 3 to 6, comprising the steps of:

8. The method of use according to claim 7, wherein the adjustment of the desired nitrogen pressure by adjusting the spring force of the spring comprises: