Gas detection alarm device

Abstract

The utility model discloses a gas detection alarm device, which relates to the technical field of gas monitoring alarm, and comprises a shell, a sensor, an alarm and a sealing element, the shell is provided with a first wall, and the first wall is provided with a plurality of gas inlet holes; the sensor is arranged in the shell, inducts gas and generates an induction signal, and the sensor is provided with a gas inlet part corresponding to the gas inlet hole; the alarm is electrically connected with the sensor, receives the induction signal and generates an alarm signal; the sealing piece is connected between the first wall and the sensor in an abutting mode, an avoiding through hole is formed in the position, corresponding to the air inlet hole, of the sealing piece, and at least the air inlet part is arranged in the avoiding through hole in a matched mode; thus, the gas flowing range is limited through the sealing piece, most of gas enters the sensor, the gas utilization rate is increased, the gas can make direct and rapid contact with the sensor, and the response time of the gas detection alarm device is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of gas monitoring and alarming, in particular to a gas detection and alarming device. Background Art

[0002] The gas detection alarm is developed based on TDLAS (tunable semiconductor laser absorption spectroscopy) technology. Once a gas leak occurs, the gas detection alarm will capture the leakage information in time, trigger the alarm and automatically cut off the valve, and push the leakage information to the user's mobile phone in time, and transmit the data to the gas transmission company synchronously; when the gas transmission company receives abnormal information, it can immediately dispatch nearby employees through work orders to conduct on-site inspections and rectifications to ensure gas safety.

[0003] In the prior art, such as the patent CN 217880514U of Infulai (Wuxi) Intelligent Sensing Technology Co., Ltd., most gas detection alarms use openings in the shell to allow air to enter the shell. When the target gas concentration reaches the detection threshold of the sensor in the gas detection alarm, an alarm will be triggered. However, during the air intake process, part of the gas flowing into the shell does not enter the sensor for detection, resulting in a low gas utilization rate. Even if the alarm response time standard can be met, the response time is relatively long. Utility Model Content

[0004] The main purpose of the utility model is to provide a gas detection alarm device with a short alarm response time, aiming to solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a gas detection alarm device, which comprises:

[0006] The housing has a first wall, wherein the first wall is provided with a plurality of air inlet holes;

[0007] A sensor, disposed in the housing, for sensing gas and generating a sensing signal, wherein the sensor has an air inlet portion, and the air inlet portion is disposed corresponding to the air inlet hole;

[0008] an alarm, electrically connected to the sensor, for receiving the sensing signal and generating an alarm signal; and,

[0009] The sealing member is in contact between the first wall and the sensor, and is provided with an avoidance through hole corresponding to the air inlet hole, and at least the air inlet portion of the sensor is adaptively arranged in the avoidance through hole.

[0010] Optionally, a sealing rib is provided on a side of the first wall facing the sensor, the sealing rib is circumferentially extended to form a sensing groove with the first wall, and the air inlet is formed on the bottom wall of the sensing groove;

[0011] The sealing member is accommodated in the sensing groove.

[0012] Optionally, the shell has a second wall, which is located at the lower end of the shell and has a plurality of air outlet holes.

[0013] Optionally, the gas detection alarm device further includes at least one protective rib, which is disposed in the shell and corresponds to the gas outlet and is spaced apart from the second wall.

[0014] Optionally, a hole is formed in the second wall of the housing;

[0015] The gas detection alarm device also includes:

[0016] a power supply unit, comprising a PCB board and a power line, wherein the PCB board is electrically connected to the sensor and the alarm, and one end of the power line is electrically connected to the PCB board; and

[0017] The tail card is arranged at the wire hole, the power line is connected to the tail card, and the other end of the power line passes through the tail card to be electrically connected to the external power supply.

[0018] Optionally, the housing has a third wall, and the third wall is provided with a through hole;

[0019] The gas detection alarm device also includes a button, which is accommodated in the through hole and corresponds to the switch key setting on the PCB board. The button is connected to an elastic cantilever, and one end of the elastic cantilever away from the button is fixed to the inner side of the third wall by hot melt adhesive, so that the button can be moved between an initial position and a pressing position along the inward and outward directions relative to the shell under force, and can act on the switch key when it moves to the pressing position.

[0020] Optionally, the housing has a fourth wall, and the fourth wall is provided with a lamp hole;

[0021] The gas detection alarm device also includes:

[0022] an indicator light, disposed on the PCB board and corresponding to the lamp hole; and

[0023] The light guide column is arranged between the indicator light and the lamp hole, and is fixed to the fourth wall by hot melt adhesive.

[0024] Optionally, the housing comprises a front cover and a rear cover, a buckling structure is provided between the front cover and the rear cover, the buckling structure comprises a matching card slot and a card protrusion, one of the card slot and the card protrusion is provided on the inner side of the front cover, and the other is provided on the inner side of the rear cover;

[0025] The first wall is formed on the front cover, and the second wall is formed on the rear cover.

[0026] Optionally, the gas detection alarm device further comprises a mounting piece, which is detachably connected to the shell and is used for detachably connecting to an external mounting portion.

[0027] Optionally, a matching mounting groove and mounting protrusion are provided between the mounting member and the shell, and one of the mounting groove and the mounting protrusion is provided on the mounting member, and the other is provided on the shell.

[0028] In the technical solution of the utility model, during the monitoring and alarm process of the gas detection alarm device, when the gas flows into the shell through the air inlet, the flow range of the gas is limited by setting the sealing member, and at least the air inlet part of the sensor is adaptively arranged in the avoidance through hole, so that most of the gas entering the shell enters the sensor through the air inlet part, and a small part of the gas enters outside the sensor, thereby improving the utilization rate of the gas and greatly shortening the flow distance of the gas, so that the gas can directly and quickly contact the sensor after passing through the air inlet, thereby realizing the rapid detection and alarm of the gas by the gas detection alarm device and reducing the response time of the gas detection alarm device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 An exploded view of an embodiment of a gas detection alarm device provided by the utility model;

[0031] Figure 2 for Figure 1 Structural diagram of the gas detection and alarm device;

[0032] Figure 3 for Figure 1 A partial structural diagram of the gas detection and alarm device;

[0033] Figure 4 for Figure 3 Schematic diagram of some structures;

[0034] Figure 5 for Figure 1 Schematic diagram of the structure of the middle front cover;

[0035] Figure 6for Figure 1 A schematic diagram of the structure of the middle rear cover at an angle;

[0036] Figure 7 for Figure 1 Schematic diagram of the structure of the middle back cover at another angle.

[0037] Description of Figure Numbers:

[0038] Label name Label name 100 Gas detection alarm device 31 Avoid through holes 1 case 4 Sealing rib 11 Front cover 41 Induction tank 111 First Wall 5 Protective reinforcement 1111 Air Inlet 6 Power supply unit 112 The Third Wall 61 PCB board 1121 Through Hole 7 Tail Card 113 The Fourth Wall 8 button 1131 Light hole 81 Elastic cantilever 12 Back cover 9 Light guide 121 Second wall 1A Buckle structure 1211 Vent 1A1 Card slot 1212 Wire hole 1A2 Card convex 2 sensor 1B Mounting parts 21 Air intake 1C Mounting slot 3 Seals 1D Mounting boss

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0043] The gas detection alarm is developed based on TDLAS (tunable semiconductor laser absorption spectroscopy) technology. Once a gas leak occurs, the gas detection alarm will capture the leakage information in time, trigger the alarm and automatically cut off the valve, and push the leakage information to the user's mobile phone in time, and transmit the data to the gas transmission company synchronously; when the gas transmission company receives abnormal information, it can immediately dispatch nearby employees through work orders to conduct on-site inspections and rectifications to ensure gas safety.

[0044] In the prior art, such as the patent CN 217880514U of Infulai (Wuxi) Intelligent Sensing Technology Co., Ltd., most gas detection alarms use openings in the shell to allow air to enter the shell. When the target gas concentration reaches the detection threshold of the sensor in the gas detection alarm, an alarm will be triggered. However, during the air intake process, part of the gas flowing into the shell does not enter the sensor for detection, resulting in a low gas utilization rate. Even if the alarm response time standard can be met, the response time is relatively long.

[0045] In view of this, the utility model provides a gas detection alarm device 100, Figures 1 to 7 This is an embodiment of a gas detection alarm device 100 provided by the present utility model.

[0046] See also Figures 1 to 7 The gas detection alarm device 100 includes a shell 1, a sensor 2, an alarm, and a seal 3. The shell 1 has a first wall, and the first wall 111 is provided with a plurality of air inlet holes 1111; the sensor 2 is arranged in the shell 1, and is used to sense gas and generate a sensing signal. The sensor 2 has an air inlet portion 21, and the air inlet portion 21 is arranged corresponding to the air inlet holes 1111; the alarm is electrically connected to the sensor 2, and is used to receive the sensing signal and generate an alarm signal for transmission; the seal 3 is abutted between the first wall 111 and the sensor 2, and is provided with an avoidance through hole 31 corresponding to the air inlet hole 1111, and at least the air inlet portion 21 of the sensor 2 is adaptively arranged in the avoidance through hole 31.

[0047] In the technical solution of the utility model, when the gas detection alarm device 100 is performing monitoring and alarming, when the gas flows into the shell 1 through the air inlet 1111, the flow range of the gas is limited by setting the sealing member 3, and at least the air inlet portion 21 of the sensor 2 is adaptively arranged in the avoidance hole 31, so that most of the gas entering the shell 1 enters the sensor 2 through the air inlet portion 21, and a small part of the gas enters the outside of the sensor 2, thereby improving the utilization rate of the gas and greatly shortening the flow distance of the gas, so that the gas can directly and quickly contact the sensor 2 after passing through the air inlet 1111, thereby realizing the rapid detection and alarm of the gas by the gas detection alarm device 100 and reducing the response time of the gas detection alarm device 100.

[0048] It should be noted that, in the present invention, the air inlet 21 of the sensor 2 can be flush with the hole end of the avoidance through hole 31 away from the first wall 111, and of course, can also extend into the avoidance through hole 31 to reduce the distance from the first wall 111, further reducing the response time of the gas detection alarm device 100. More specifically, in an embodiment of the present invention, the air inlet 21 extends into the avoidance through hole 31, and the distance from the first wall 111 is 0.5 mm.

[0049] It should also be noted that the alarm is also electrically connected to an external control terminal to transmit the alarm signal generated by it to the external control terminal. More specifically, the external control terminal includes a user's mobile phone terminal, a control center of a gas delivery company, and the like.

[0050] For further information, see Figure 3 and Figure 4 The first wall 111 is provided with a sealing rib 4 on one side facing the sensor 2, and the sealing rib 4 is extended in the circumferential direction to form a sensing groove 41 with the first wall 111, and the air inlet 1111 is formed on the bottom wall of the sensing groove 41; the sealing member 3 is accommodated in the sensing groove 41; in this way, the sealing performance can be improved, the amount of gas entering the outside of the sensor 2 can be further reduced, and the gas utilization rate can be improved. Specifically, in an embodiment of the utility model, the response time of the gas detection alarm device 100 can be shortened by 8s, which is much less than the national standard response time of 30s.

[0051] Furthermore, the sealing rib 4 is provided with two mold holes, and the two mold holes are spaced apart along the circumference of the sealing rib 4; thus, demoulding is facilitated when the first wall is produced by integrally forming the mold.

[0052] Specifically, the sealing member 3 is foam. More specifically, the foam material includes polyester material, which has good sealing performance and a certain amount of compression.

[0053] For details, please refer to Figure 2 , Figure 6 and Figure 7 The shell 1 has a second wall 121, which is located at the lower end of the shell 1 and has a plurality of air outlets 1211. In this way, the gas outside the sensor 2 can be discharged from the shell 1 through the air outlets 1211, thereby preventing the gas from being stagnant in the shell 1 or even entering the sensor 2, causing the gas detection alarm device 100 to continuously alarm and affecting the user's experience. At the same time, since the air outlets 1211 are located at the lower end of the shell 1, when a small amount of water enters the shell 1, the water droplets can quickly flow to the air outlets 1211 under the action of gravity, and then flow out of the shell 1, thereby preventing the electronic components in the shell 1 from being damaged by contact with water or being in contact with water for too long.

[0054] For further information, see Figure 3 and Figure 4 The gas detection alarm device 100 further includes at least one protective rib 5, which is disposed in the housing 1 and corresponds to the gas outlet 1211 and is spaced apart from the second wall 121. Thus, when a sharp object is inserted into the housing 1 through the gas outlet 1211, it can be blocked by the protective rib 5 from further extending into the housing 1, thereby preventing the electronic components in the housing 1 from being damaged, protecting the structure of the electronic components, and thus ensuring that the gas detection alarm device 100 can operate normally.

[0055] For details, please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 , a wire hole 1212 is provided on the second wall 121 of the shell 1; the gas detection alarm device 100 also includes a power supply unit 6 and a tail card 7, the power supply unit 6 includes a PCB board 61 and a power line, the PCB board 61 is electrically connected to the sensor 2 and the alarm, and one end of the power line is electrically connected to the PCB board 61; the tail card 7 is arranged in the wire hole 1212, the power line is connected to the tail card 7, and the other end of the power line passes through the tail card 7 and is electrically connected to an external power source. In this way, the power line is fixed by setting the tail card 7, and the service life of the power line is extended. At the same time, the setting of the tail card 7 also has a certain sealing effect on the shell 1. More specifically, the tail card 7 is interference fit with the wire hole 1212.

[0056] For further information, see Figures 1 to 5, the shell 1 has a third wall 112, and the third wall 112 is provided with a through hole 1121; the gas detection alarm device 100 also includes a button 8, the button 8 is accommodated in the through hole 1121, and corresponds to the switch key setting on the PCB board 61, the button 8 is connected with an elastic cantilever 81, and the end of the elastic cantilever 81 away from the button 8 is fixed to the inner side of the third wall 112 by hot melt adhesive, so that the button 8 can be moved between an initial position and a pressing position in the inner and outer directions relative to the shell 1 under force, and when it moves to the pressing position, it can act on the switch key; in this way, the button 8 can be moved from the initial position to the pressing position under the action of a force to act on the switch key, and when the action force is cancelled, the button 8 can be reset from the pressing position to the initial position under the action of the elastic force of the elastic cantilever 81; thus, the user can control the gas detection alarm device 100 to be turned on or off by pressing the button 8.

[0057] Furthermore, a positioning column is protrudingly provided on the inner side of the third wall 112 , and the positioning column is inserted into one end of the elastic cantilever 81 connected to the third wall 112 to limit the elastic cantilever 81 .

[0058] For details, please refer to Figures 1 to 5 The housing 1 has a fourth wall 113, and a lamp hole 1131 is formed in the fourth wall 113; the gas detection alarm device 100 also includes an indicator light and a light guide column 9, the indicator light is arranged on the PCB board 61, and is arranged corresponding to the lamp hole 1131; the light guide column 9 is arranged between the indicator light and the lamp hole 1131, and is fixed to the fourth wall 113 by hot melt adhesive. In this way, the switch state of the gas detection alarm device 100 is displayed by the indicator light, which is convenient for users to use. In addition, by setting the light guide column 9, the scattering of the light of the indicator light before reaching the lamp hole 1131 is reduced, and the luminous intensity is enhanced.

[0059] For details, please refer to Figures 1 to 7 The shell 1 includes a front cover 11 and a rear cover 12, and a buckling structure 1A is provided between the front cover 11 and the rear cover 12, and the buckling structure 1A includes a card slot 1A1 and a card protrusion 1A2 that match each other, and one of the card slot 1A1 and the card protrusion 1A2 is provided on the inner side of the front cover 11, and the other is provided on the inner side of the rear cover 12; in this way, the buckling structure 1A is provided in the shell 1, which can improve the connection stability of the front cover 11 and the rear cover 12, and it is not easy to remove the front cover 11 and the rear cover 12 from the outside without damaging the shell 1.

[0060] It should be noted that, in the present invention, the first wall 111, the second wall 121, the third wall 112 and the fourth wall 113 mentioned above can be formed in the same part of the housing 1, or in different parts of the housing 1. Of course, some of the side walls can also be the same part. For details, please refer to Figures 1 to 7 In one embodiment of the present invention, the first wall 111 is formed on the front cover 11 , the second wall 121 is formed on the rear cover 12 , and the third wall 112 and the fourth wall 113 are also formed on the front cover 11 .

[0061] For details, please refer to Figure 1 The gas detection alarm device 100 further includes a mounting member 1B, which is detachably connected to the housing 1 and is used to be detachably connected to the external mounting portion. In this way, the gas detection alarm device 100 is mounted on the external mounting portion through the mounting member 1B, which facilitates the assembly and disassembly of the gas detection alarm device 100.

[0062] It should be noted that, in the present invention, the external installation portion is not limited and can be a wall surface, a cabinet surface, etc.

[0063] It should also be noted that, in the present invention, the mounting member 1B and the external mounting portion may be connected by threads or by bonding.

[0064] For further information, see Figure 1 and Figure 7 , a matching mounting groove 1C and a mounting protrusion 1D are provided between the mounting member 1B and the housing 1, one of the mounting groove 1C and the mounting protrusion 1D is provided on the mounting member 1B, and the other is provided on the housing 1. In this way, the gas detection alarm device 100 is engaged with the mounting member 1B, which facilitates the assembly and disassembly of the gas detection alarm device 100 and the mounting member 1B.

[0065] More specifically, the mounting member 1B is disc-shaped, and three mounting grooves 1C are provided on the outer periphery of the mounting member 1B, and the three mounting grooves 1C are distributed at intervals along the circumference of the mounting member 1B; correspondingly, a limiting groove is provided on the side of the shell 1 facing the mounting member 1B, the notch of the limiting groove is circular, and three mounting protrusions 1D are convexly provided on the inner side wall of the limiting groove, and the three mounting protrusions 1D are distributed at intervals along the circumference of the limiting groove; in this way, the user can rotate at least one of the mounting member 1B and the shell 1 so that the mounting protrusion 1D is inserted into or removed from the mounting groove 1C, thereby realizing the disassembly and assembly of the mounting member 1B and the shell 1, and the structure is simple and the operation is convenient.

[0066] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A gas detection alarm device, characterized in that: The gas detection alarm device comprises: The housing has a first wall, wherein the first wall is provided with a plurality of air inlet holes; A sensor, disposed in the housing, for sensing gas and generating a sensing signal, wherein the sensor comprises an air inlet portion, and the air inlet portion is disposed corresponding to the air inlet hole; an alarm, electrically connected to the sensor, for receiving the sensing signal and generating an alarm signal; and, The sealing member is in contact between the first wall and the sensor, and an avoidance through hole is opened corresponding to the air inlet hole, and at least the air inlet part of the sensor is adaptively arranged in the avoidance through hole.

2. The gas detection alarm device according to claim 1, characterized in that: A sealing rib is provided on a side of the first wall facing the sensor, and the sealing rib is extended in the circumferential direction to form a sensing groove with the first wall, and the air inlet is formed on the bottom wall of the sensing groove; The sealing member is accommodated in the sensing groove.

3. The gas detection alarm device according to claim 1, characterized in that: The shell has a second wall, which is located at the lower end of the shell and has a plurality of air outlets.

4. The gas detection alarm device according to claim 3, characterized in that: The gas detection alarm device further comprises at least one protective rib, which is arranged in the shell, corresponding to the gas outlet, and spaced apart from the second wall.

5. The gas detection alarm device according to claim 1, characterized in that: The second wall of the housing is provided with a line hole; The gas detection alarm device also includes: a power supply unit, comprising a PCB board and a power line, wherein the PCB board is electrically connected to the sensor and the alarm, and one end of the power line is electrically connected to the PCB board; and The tail card is arranged at the wire hole, the power line is connected to the tail card, and the other end of the power line passes through the tail card to be electrically connected to the external power supply.

6. The gas detection alarm device according to claim 5, characterized in that: The shell has a third wall, and the third wall is provided with a through hole; The gas detection alarm device also includes a button, which is accommodated in the through hole and corresponds to the switch key setting on the PCB board. The button is connected to an elastic cantilever, and one end of the elastic cantilever away from the button is fixed to the inner side of the third wall by hot melt adhesive, so that the button can be moved between an initial position and a pressing position along the inward and outward directions relative to the shell under force, and can act on the switch key when it moves to the pressing position.

7. The gas detection alarm device according to claim 5, characterized in that: The housing has a fourth wall, and the fourth wall is provided with a lamp hole; The gas detection alarm device also includes: an indicator light, disposed on the PCB board and corresponding to the lamp hole; and The light guide column is arranged between the indicator light and the lamp hole, and is fixed to the fourth wall by hot melt adhesive.

8. The gas detection alarm device according to any one of claims 3 to 7, characterized in that: The housing comprises a front cover and a rear cover, a buckle structure is provided between the front cover and the rear cover, the buckle structure comprises a matching card slot and a card protrusion, one of the card slot and the card protrusion is provided on the inner side of the front cover, and the other is provided on the inner side of the rear cover; The first wall is formed on the front cover, and the second wall is formed on the rear cover.

9. The gas detection alarm device according to claim 1, characterized in that: The gas detection alarm device also includes a mounting piece, which is detachably connected to the shell and is used for detachably connecting to an external mounting part.

10. The gas detection alarm device according to claim 9, characterized in that: An adaptable mounting groove and a mounting protrusion are arranged between the mounting member and the shell, one of the mounting groove and the mounting protrusion is arranged on the mounting member, and the other is arranged on the shell.

Images