Intelligent monitoring device for underground excavation engineering safety helmet and oxygen content monitoring method

Abstract

The invention discloses an intelligent monitoring device for an underground excavation engineering safety helmet and an oxygen content monitoring method, and relates to the technical field of building equipment. The intelligent monitoring device for the underground excavation engineering safety helmet comprises a main shell, a coating assembly and a monitoring assembly. The coating assembly comprises a plurality of coating frames; the monitoring assembly comprises an air bag, an oxygen sensor, a first one-way valve, a second one-way valve, an air inlet pipe, a storage battery, a microprocessor and an alarm. The oxygen sensor is vertically and fixedly inserted into the upper surface of the airbag and is communicated with an inner cavity of the airbag; two ends of the air bag are respectively connected and communicated with the first one-way valve and the second one-way valve which is connected and communicated with the air inlet pipe. The main shell has a structure supporting function on the coating assembly and the monitoring assembly; the monitoring assembly repeatedly extrudes the air bag by means of the action of a user, so that air in the environment is sucked in, and the oxygen content is monitored in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, and in particular to an intelligent monitoring device for safety helmets in underground excavation projects and an oxygen content monitoring method. Background Art

[0002] With the rapid development of highways, railways and municipal road projects, more and more tunnel excavation projects are involved. The progress of tunnel rotary excavation is usually slightly faster than the construction progress of the ventilation system. Therefore, the monitoring technology of oxygen content in the tunnel is crucial, which is directly related to the life safety of construction workers in the tunnel.

[0003] As an essential safety measure for workers in underground excavation operations, safety helmets provide an object for real-time monitoring of oxygen content. Summary of the invention

[0004] In order to meet the demand of the above-mentioned background technology for "real-time monitoring technology of oxygen content in tunnels", the present invention provides an intelligent monitoring device for safety helmets in dark excavation projects and a method for monitoring oxygen content.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: An intelligent monitoring device for a safety helmet in a dark excavation project comprises a main shell, a covering assembly and a monitoring assembly; the covering assembly comprises a plurality of covering frames arranged in a transverse circular array on the side wall of the inner cavity of the main shell; a accommodating space is provided above the covering frame; the monitoring assembly comprises an airbag, an oxygen sensor, a first one-way valve, a second one-way valve, an air intake pipe, a battery, a microprocessor and an alarm; the airbag is placed in the accommodating space, and the top surface of the airbag is fixedly connected to the top surface of the inner cavity of the main shell; the oxygen sensor is vertically fixedly inserted on the upper surface of the airbag and communicated with the inner cavity of the airbag; the two ends of the airbag are respectively connected and communicated with a first one-way valve and a second one-way valve, the second one-way valve is connected and communicated with the air intake pipe, and the air outlet of the first one-way valve points to the ventilation gap between the main shell and the covering frame.

[0006] As a further optimization solution of the present invention, the airbag is in an upward convex arc shape.

[0007] As a further optimization scheme of the present invention, the main shell body is provided with a protrusion, which is located above the airbag, and the bottom surface of the protrusion is provided with a first accommodating groove, in which a covering plate connected to the bottom surface of the protrusion is installed; the top surface of the covering plate is provided with a groove for accommodating and clamping the battery, the microprocessor and the alarm.

[0008] As a further optimization solution of the present invention, the side wall of the first accommodating groove is provided with an extension hole for accommodating the oxygen sensor; the extension hole is placed on the outer side of the side wall of the covering plate.

[0009] As a further optimization solution of the present invention, the depth of the extension hole is greater than the height of the oxygen sensor, and the oxygen sensor is inserted in the middle and lower part of the extension hole.

[0010] As a further optimization scheme of the present invention, a threading hole is provided at the lower end of the protrusion, and the air inlet pipe is inserted into the threading hole; the extension hole is provided on the side wall of the covering plate close to the threading hole.

[0011] As a further optimization solution of the present invention, the airbag is made of elastic rubber material.

[0012] As a further optimization solution of the present invention, the covering frame includes an arc-shaped frame body and a support rod, one end of the support rod is vertically fixedly connected to the arc-shaped frame body, and the other end is clamped to the inner wall of the main shell.

[0013] As a further optimization solution of the present invention, the protrusion is fixedly connected to the main shell.

[0014] A method for monitoring oxygen content, using an intelligent monitoring device for a safety helmet for a dark excavation project to detect oxygen content, the steps comprising: S1, wearing the intelligent monitoring device for a safety helmet for a dark excavation project on the head of a user; S2, the user's actions drive the intelligent monitoring device for a safety helmet for a dark excavation project to vibrate, so as to repeatedly squeeze the airbag to inhale external air into the airbag cavity, and the oxygen sensor monitors the oxygen content of the inhaled air.

[0015] In summary, the present invention is beneficial in that: (1) The present invention has a simple structure and reliable functions. The main shell provides structural support for the covering component and the monitoring component. The monitoring component uses the actions of the user to repeatedly squeeze the airbag, thereby inhaling the air in the environment and monitoring the oxygen content in real time to ensure the construction safety of the user. The covering component is connected to the user's head while maintaining the ventilation gap without being blocked, so as to ensure that the air intake and exhaust functions of the airbag are normal.

[0016] (2) Compared with testing in an open environment, the suction-type testing can filter out particulate impurities such as dust, avoiding the problem of blockage and failure of the second one-way valve and the oxygen sensor, thereby improving the operational reliability and service life of the present invention.

[0017] (3) When the intelligent monitoring device for underground excavation helmets is worn on the user's head, the raised part, cover plate, battery, microprocessor and alarm are all located above the head. When the user moves, the extrusion amplitude between the top of the head and the airbag will increase (due to the increase in inertia caused by the increase in local mass of the raised part), thereby increasing the intake and exhaust volumes, achieving rapid replacement of the gas in the airbag and reducing the problem of monitoring lag. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described below with reference to the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the airbag installation position; Figure 3 It is a schematic diagram of the structure of the monitoring component; Figure 4 is a schematic diagram of the position and structure of the first containing groove; Figure 5 The following is a schematic diagram of the installation position and structure of the cover board; Figure 6 It is a schematic diagram of the covering frame structure; Figure 7 Schematic diagram of the position and structure of the ventilation gap; Figure 8 is a schematic diagram of the position of the extension hole; Fig. 9 It is a schematic diagram of the location and structure of the concave cavity; Fig.10 This is a schematic diagram of the location and structure of the wiring holes; Fig.11 Schematic diagram of the support fin position and structure.

[0019] Description of reference numerals: In the figure, 1. Main housing; 11. Raised portion; 1101. First receiving groove; 11011. Groove; 1102. Extension hole; 1103. Threading hole; 12. Covering plate; 121. Wire routing hole; 2. Envelope assembly; 201. Accommodation space; 21. Envelope frame; 211. Arc-shaped frame; 212. Support rod; 2121. Ventilation gap; 213. Support fin; 3. Monitoring component; 31. Airbag; 3101. Concave cavity; 32. Oxygen sensor; 33. First one-way valve; 34. Second one-way valve; 35. Intake pipe; 351. Filter; 36. Battery; 37. Microprocessor; 38. Alarm. DETAILED DESCRIPTION

[0020] Based on the above structural features of the present application, the implementation methods of the present application are further described: Reference Figure 1-2 This embodiment provides an intelligent monitoring device for a safety helmet for a dark excavation project, comprising a main housing 1, a covering component 2 and a monitoring component 3. The main housing 1 is a plastic shell-like structure with a convex middle portion, and the main housing 1 is used to provide structural support for the covering component 2 and the monitoring component 3, while retaining a protective effect on the user's head.

[0021] Reference Figure 1-2 , Figure 6 The covering component 2 includes a plurality of covering frames 21 arranged in a transverse circular array on the side wall of the inner cavity of the main shell 1; the covering frame 21 is not arranged on the top wall of the inner cavity of the main shell 1, that is, a accommodating space 201 is provided above the covering frame 21 so that the top of the user's head can be relatively squeezed against the monitoring component 3.

[0022] Reference Figure 2 and Figure 3 The monitoring assembly 3 includes an airbag 31, an oxygen sensor 32, a first one-way valve 33, a second one-way valve 34, an air intake pipe 35, a battery 36, a microprocessor 37 and an alarm 38. The airbag 31 is placed in the accommodating space 201, and the top surface of the airbag 31 is fixedly connected to the top surface of the inner cavity of the main shell 1 (for example, by gluing, clamping, etc.). The top of the user's head relatively presses the bottom surface of the airbag 31, so that the airbag 31 can be inhaled and exhausted.

[0023] Reference Figure 3 , the oxygen sensor 32 is vertically fixed and inserted on the upper surface of the airbag 31 (for example, fixed and sealed by hot melting or hot pressing) and communicated with the inner cavity of the airbag 31; the two ends of the airbag 31 are respectively connected and communicated with the first one-way valve 33 and the second one-way valve 34. The first one-way valve 33 and the second one-way valve 34 are respectively communicated with the inner cavity of the airbag 31, and the first one-way valve 33 and the second one-way valve 34 are respectively fixed and sealed with the ends of the airbag 31 by hot melting or hot pressing. When the airbag 31 is squeezed, the gas (part of the inner cavity) can be discharged through the first one-way valve 33; when the airbag 31 rebounds, the external gas can be sucked into its inner cavity through the second one-way valve 34 and the intake pipe 35.

[0024] The second one-way valve 34 is connected to and communicates with the air inlet pipe 35 (for example, fixed and sealed by hot melting or hot pressing).

[0025] Reference Figure 7 , the air outlet of the first one-way valve 33 points to the ventilation gap 2121 between the main shell 1 and the covering frame 21. After the intelligent monitoring device for the safety helmet for underground excavation engineering is worn on the head of the user, the top of the user's head fits against the inner wall of the arc frame 211, resulting in the middle of the accommodating space 201 being blocked, so the exhaust gas is discharged from the inner cavity of the main shell 1 through the ventilation gap 2121.

[0026] Reference Figure 2 The airbag 31 is in an upward convex arc shape, so that the top surface of the airbag 31 can fit the top wall of the inner cavity of the main shell 1, and the bottom surface of the airbag 31 can fit the top of the user's head, so as to improve wearing comfort and avoid damage to the airbag 31 caused by stress concentration.

[0027] Reference Figure 3 to Figure 5 The main shell 1 is provided with a protrusion 11 extending upward, and a first accommodating groove 1101 is provided on the bottom surface of the protrusion 11. A covering plate 12 connected to the bottom surface of the protrusion 11 is installed in the first accommodating groove 1101 (for example, detachable connection by bolts, detachable connection by snaps, fixed connection by hot melt, fixed connection by hot pressing, etc.); the top surface of the covering plate 12 is provided with a groove 11011 for accommodating and clamping the battery 36, the microprocessor 37 and the alarm 38. The raised portion 11 is located above the airbag 31, and the battery 36, the microprocessor 37 and the alarm 38 are all located above the airbag 31. Therefore, the local mass of the main shell 1 at the position of the raised portion 11 increases. After the intelligent monitoring device for the underground excavation engineering safety helmet is worn on the head of the user, the raised portion 11, the cover plate 12, the battery 36, the microprocessor 37 and the alarm 38 are all located above the top of the head. When the user moves (such as walking, squatting, bending over and other actions with longitudinal acceleration), the squeezing amplitude between the top of the head and the airbag 31 will increase (due to the increase in inertia caused by the increase in the local mass of the raised portion 11), thereby increasing the intake and exhaust volumes, realizing rapid replacement of the gas in the airbag 31, and reducing the problem of monitoring lag (because the original gas in the airbag 31 and the original gas in the intake pipe 35 will dilute the newly inhaled gas, causing the monitoring speed to lag behind the actual oxygen content change rate caused by changes in the external environment; external environmental changes such as changes in the depth of the tunnel where the user is located).

[0028] Reference Figure 2 to Figure 5 The side wall of the first receiving groove 1101 is provided with an extension hole 1102 for receiving the oxygen sensor 32; the extension hole 1102 is placed on the outside of the side wall of the cover plate 12; the depth of the extension hole 1102 is greater than the height of the oxygen sensor 32, and the oxygen sensor 32 is plugged into the middle and lower part of the extension hole 1102. When a collision-type safety accident occurs, since the airbag 31 cannot instantly discharge the internal gas, the airbag 31 plays a buffering role between the user's head and the impact object, thereby reducing the user's injuries; when the impact force is so great that the airbag 31 explodes, the head and / or the airbag 31 can completely push the oxygen sensor 32 into the extension hole 1102 to prevent the oxygen sensor 32 from hurting the top of the head.

[0029] Reference Figure 3 , Figure 5 and Fig. 9Since the oxygen sensor 32 is inserted into the lower middle part of the extension hole 1102, the oxygen sensor 32 is as close to the inner cavity of the airbag 31 as possible, avoiding the appearance of a concave cavity 3101 between the inner cavity of the airbag 31 and the oxygen sensor 32, so that the newly inhaled air can flow to the oxygen sensor 32 as quickly as possible, thereby reducing the problem of monitoring lag.

[0030] Reference Figure 3 and Figure 5 , a threading hole 1103 is provided at the lower end of the raised part 11, and the air inlet pipe 35 is inserted and arranged in the threading hole 1103. The air inlet pipe 35 is a rubber hose, so that it is easy to insert into the threading hole 1103 during assembly; the outer wall of the air inlet pipe 35 and the inner wall of the threading hole 1103 are fixed by gluing. The inner end of the threading hole 1103 is penetrated and arranged with the inner wall of the raised part 11, and the outer end of the threading hole 1103 is penetrated and arranged with the bottom wall of the raised part 11; the normal line of the bottom wall of the raised part 11 points obliquely downward, so as to prevent rainwater from flowing into the threading hole 1103 and the air inlet pipe 35. A filter screen 351 is fixedly installed at the bottom wall of the raised portion 11 (for example, fixedly connected by hot melting, fixedly connected by hot pressing, fixedly connected by gluing, etc.), and the filter screen 351 covers the end surface of the threading hole 1103 and the end surface of the air intake pipe 35, thereby preventing particulate impurities such as dust from entering the second one-way valve 34 and the airbag 31, further preventing the second one-way valve 34 and the oxygen sensor 32 from being blocked, and at the same time ensuring the monitoring accuracy of the oxygen content.

[0031] Reference Figure 8 The extension hole 1102 is arranged on the side wall of the cover plate 12 close to the threading hole 1103, so that the oxygen sensor 32 and the intake pipe 35 are as close as possible, so that the newly inhaled air can flow to the position of the oxygen sensor 32 as quickly as possible, thereby reducing the problem of monitoring lag.

[0032] Reference Figure 3 and Figure 4 , the raised portion 11 is an arc plate-shaped structure.

[0033] The airbag 31 is made of elastic rubber material so as to achieve rebound.

[0034] Reference Figure 2 , Figure 6 and Figure 7The covering frame 21 includes an arc-shaped frame body 211 and a support rod 212. One end of the support rod 212 is vertically fixedly connected to the arc-shaped frame body 211 (for example, through an integrated fixed connection), and the other end is clamped to the inner wall of the main shell 1. The end of the support rod 212 away from the arc-shaped frame body 211 is fixedly connected with a clamping ball through an integrated manner. A socket is provided on the inner wall of the main shell 1, and the socket is adapted to the support rod 212; a clamping ring body is provided on the inner wall of the socket; when assembling the intelligent monitoring device for the safety helmet of the dark excavation project, one end of the support rod 212 provided with the clamping ball is inserted into the socket until the clamping ring body is adapted to clamp the clamping ball, thereby completing the installation of the covering frame 21. The main shell 1, the socket and the clamping ring body are fixedly connected in an integrated manner.

[0035] Reference Figure 7 The support rod 212 plays a supporting role between the main shell 1 and the arc frame 211, thereby avoiding the problem of the ventilation gap 2121 being blocked due to the inner wall of the main shell 1 and the outer wall of the arc frame 211 and the head being squeezed and fitted against each other, thereby ensuring the smoothness of exhaust.

[0036] Reference Figure 3 The oxygen sensor 32, the microprocessor 37 and the alarm 38 are connected to the battery 36 through wires respectively; the oxygen sensor 32 is connected to the microprocessor 37 through a signal line, and the alarm 38 is connected to the microprocessor 37 through a signal line. Fig.10 The cover plate 12 is provided with wiring holes 121 for wiring the wires and signal lines, so as to realize the layout of the wires and signal lines connected to the oxygen sensor 32.

[0037] Reference Figure 5 When the cover plate 12 is connected to the raised portion 11 by bolts, the cover plate 12 is provided with a countersunk hole, thereby avoiding the problem that the stud of the bolt squeezes and wears the airbag 31, thereby improving the service life of the airbag 31.

[0038] The protrusion 11 is fixedly connected to the main housing 1 (for example, through an integral fixed connection).

[0039] The arc-shaped frame body 211 is a frame structure with an arc-shaped bend and a trapezoidal edge, so that it has excellent air permeability when worn by a user.

[0040] The bottom edge of the arc-shaped frame 211 is connected with a strap by binding. After the user fastens the covering frame 21 on the upper part of the head, the strap is used to tighten the chin, thereby improving the wearing stability.

[0041] Reference Fig.11The covering component 2 also includes a support fin 213 that is integrally fixedly connected to the top surface of the arc-shaped frame 211. The support fin 213 is used to apply a downward support force to the top of the head, thereby avoiding the problem that the airbag 31 cannot rebound under pressure due to excessive tightening force of the laces. The covering component 2 is detachably connected to the main shell 1, and the covering component 2 is provided with a plurality of replaceable support fins 213 of different widths of different covering components 2, that is, the support fins 213 belonging to different covering components 2 extend inward laterally at different distances, thereby adapting to different head shapes of users and improving wearing comfort and firmness.

[0042] A method for monitoring oxygen content, using an intelligent monitoring device for a safety helmet in a dark excavation project to detect the oxygen content in the environment where the user is located, the steps comprising: S1. Wear the intelligent monitoring device for the safety helmet of the underground excavation project on the head of the user; S2. The actions of the user drive the intelligent monitoring device for the dark excavation engineering helmet to vibrate, so as to repeatedly squeeze the airbag 31 so as to inhale the outside air into the inner cavity of the airbag 31, and the oxygen sensor 32 monitors the oxygen content of the inhaled air.

[0043] The oxygen sensor 32 is an optical oxygen sensor, an aluminum oxide oxygen sensor, a steel film oxygen sensor or a thermal conductivity oxygen sensor.

[0044] The alarm 38 is a speaker.

[0045] The microprocessor 37 is used to compare the built-in threshold data with the data actually received from the oxygen sensor 32 in real time; when the detected data is lower than the threshold data, the microprocessor 37 controls the alarm 38 to emit a warning sound, thereby reminding the user.

[0046] When the oxygen content in the environment where the user is located is lower than M% (usually, the M value is 18), the user will suffer from hypoxia; and the oxygen content monitoring technology provided in the present invention has hysteresis, so the built-in threshold data needs to be greater than M. The threshold data is related to factors such as the intensity of the user's activities, the elasticity of the airbag 31, and the aperture of the air intake pipe 35, and can be estimated through multiple tests.

[0047] The present invention has a simple structure and reliable functions. The main shell 1 plays a structural supporting function for the covering component 2 and the monitoring component 3; the monitoring component 3 realizes repeated squeezing of the airbag 31 with the help of the user's actions, thereby sucking in the air in the environment and performing real-time monitoring of the oxygen content to ensure the construction safety of the user; the covering component 2 is connected to the user's head while maintaining the ventilation gap 2121 without being blocked to ensure the normal suction and exhaust functions of the airbag 31. The suction detection can filter out particulate impurities such as dust, avoid the problem of blockage and failure of the second one-way valve 34 and the oxygen sensor 32, and thus improve the operational reliability of the present invention.

[0048] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. An intelligent monitoring device for safety helmets in dark excavation projects, characterized in that: It comprises a main housing (1), a covering component (2) and a monitoring component (3); The covering assembly (2) comprises a plurality of covering frames (21) arranged in a transverse circular array on the inner cavity side wall of the main shell (1); a receiving space (201) is provided above the covering frames (21); The monitoring assembly (3) comprises an airbag (31), an oxygen sensor (32), a first one-way valve (33), a second one-way valve (34), an air intake pipe (35), a battery (36), a microprocessor (37) and an alarm (38); the airbag (31) is placed in the accommodating space (201), and the top surface of the airbag (31) is fixedly connected to the top surface of the inner cavity of the main shell (1); the oxygen sensor (32) is vertically fixedly plugged into the upper surface of the airbag (31) and communicated with the inner cavity of the airbag (31); the two ends of the airbag (31) are respectively connected to and communicated with the first one-way valve (33) and the second one-way valve (34), the second one-way valve (34) is connected to and communicated with the air intake pipe (35), and the air outlet of the first one-way valve (33) points to the ventilation gap (2121) between the main shell (1) and the covering frame (21).

2. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 1 is characterized in that: The airbag (31) is in an upward convex arc shape.

3. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 2 is characterized in that: The main shell (1) is provided with a protrusion (11), the protrusion (11) is located above the airbag (31), the bottom surface of the protrusion (11) is provided with a first receiving groove (1101), and a covering plate (12) connected to the bottom surface of the protrusion (11) is installed in the first receiving groove (1101); the top surface of the covering plate (12) is provided with a groove (11011) for accommodating and clamping the battery (36), the microprocessor (37) and the alarm (38).

4. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 3 is characterized in that: The side wall of the first accommodating groove (1101) is provided with an extension hole (1102) for accommodating the oxygen sensor (32); the extension hole (1102) is located on the outside of the side wall of the covering plate (12).

5. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 4 is characterized in that: The depth of the extension hole (1102) is greater than the height of the oxygen sensor (32), and the oxygen sensor (32) is plugged into the middle and lower part of the extension hole (1102).

6. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 5 is characterized in that: A threading hole (1103) is provided at the lower end of the raised portion (11), and the air inlet pipe (35) is inserted into the threading hole (1103); the extension hole (1102) is provided on the side wall of the cover plate (12) close to the threading hole (1103).

7. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 6 is characterized in that: The airbag (31) is made of elastic rubber material.

8. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 7 is characterized in that: The covering frame (21) comprises an arc-shaped frame body (211) and a support rod (212); one end of the support rod (212) is vertically fixedly connected to the arc-shaped frame body (211), and the other end is clamped to the inner wall of the main shell (1).

9. The intelligent monitoring device for safety helmets for underground excavation projects according to claim 8 is characterized in that: The protruding portion (11) is fixedly connected to the main housing (1).

10. A method for monitoring oxygen content, characterized in that: The oxygen content is monitored by using the intelligent monitoring device for safety helmets for underground excavation projects as claimed in claim 9, and the steps include: S1. Wear the intelligent monitoring device for the dark excavation engineering helmet on the user's head; S2. The actions of the user cause the intelligent monitoring device for the dark excavation engineering helmet to vibrate, thereby repeatedly squeezing the airbag (31) so as to draw outside air into the inner cavity of the airbag (31), and the oxygen sensor (32) monitors the oxygen content of the inhaled air.

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