Fixed gas detector

Abstract

The utility model discloses a fixed gas detector which comprises a shell upper cover, a shell lower cover, a cavity formed between the shell upper cover and the shell lower cover after the shell upper cover and the shell lower cover are connected, a PCB (Printed Circuit Board), a display screen connected with the PCB, a sensor PCB and a first sensor PCB connected with the sensor PCB, the first sensor PCB is connected with the PCB, and a sensor connected with the PCB. And the sensor is connected with the sensor PCB. According to the utility model, the upper cover and the lower cover are arranged, the PCB is protected inside, the PCB is firmer when being used through the limiting structures of the PCB and the lower cover, the upper cover, the lower cover and the sensor shell are also provided with the limiting structures, the whole is firm, the sensor PCB and the first sensor PCB are installed in the sensor shell and integrated on the lower cover of the shell, the PCBs are protected, and the reliability of the sensor is improved. The probability that internal components are damaged by the external environment is avoided, and rapid installation and maintenance are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas detectors, and in particular relates to a fixed gas detector. Background Art

[0002] A fixed gas detector is a device installed in a specific place for continuous monitoring and detection of the concentration of one or more gases in the environment. This type of equipment is used in situations where it is necessary to monitor the leakage of flammable, explosive or toxic and harmful gases. It provides a strong guarantee for the safety of people’s lives and property and is the current mainstream trend in the market.

[0003] A fixed gas detector includes a flameproof housing, a protective device for special environments, an explosion-proof tube, and a sensor assembly. A plastic housing is provided inside the flameproof housing to fix a main control PCBA. The main control can be adjusted in a remote control mode. A sensor housing is also provided to fix a gas sensor. The technical solution of the utility model improves the composition of the existing fixed gas detector, making its detection function more comprehensive, improving the reliability of the fixed gas detector, shortening the response time, extending the service life, and making maintenance more convenient.

[0004] There are the following problems:

[0005] Since most of the existing fixed gas detectors adopt the public mold method and only use the metal shell structure, this brings great inconvenience to production, installation and maintenance, and the lack of protection for PCBA greatly increases the damage caused by misoperation, thereby increasing manpower, capital and time costs. Utility Model Content

[0006] The purpose of the utility model is to provide a fixed gas detector to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, the utility model provides the following technical solutions: a fixed gas detector, comprising

[0008] The upper cover of the housing is provided with an opening, and the edge thereof extends outward to form an extension portion, and the inner wall of the extension portion is provided with an internal thread;

[0009] The lower cover of the outer shell has an edge extending outward to form an extension part 1, and the outer surface of the extension part 1 is provided with an external thread, the extension part 1 is threadedly connected with the extension part, and a cavity is formed between the upper cover of the outer shell and the lower cover of the outer shell after the connection;

[0010] A PCB board is arranged in the cavity;

[0011] A display screen is arranged in the cavity and located at the opening of the upper cover of the housing, and the display screen is connected to the PCB board;

[0012] A sensor PCB board and a sensor PCB board 1 connected thereto, wherein the sensor PCB board 1 is connected to the PCB board;

[0013] The sensor is connected to the sensor PCB board.

[0014] Preferably, a plurality of sensor installation openings are provided on the lower cover of the housing.

[0015] Preferably, any of the above schemes further comprises

[0016] The lower cover has a plurality of limiting posts disposed therein, and the PCB is limited in position in the lower cover through limiting holes and the limiting posts;

[0017] The upper cover is connected to the lower cover, the outer surfaces of the lower cover and the upper cover are both provided with limiting grooves, the inner wall of the lower cover of the shell is provided with limiting strips, so that the connected lower cover and the upper cover are limited in the cavity, and the outer surface of the upper cover is provided with a handle;

[0018] The display screen is installed in the upper cover through a screen bracket.

[0019] Preferably, in any of the above solutions, the display screen is limited on the screen bracket by a limiting groove, and the screen bracket abuts against the inner wall of the upper cover.

[0020] Preferably, any of the above solutions further comprises a glass fixing ring, which is located close to the upper cover, and the outer surface of the glass fixing ring is provided with threads matching the internal threads of the upper cover of the housing;

[0021] Explosion-proof glass and a glass sealing ring, wherein the explosion-proof glass is arranged between the glass sealing ring and the glass fixing ring, one side of the glass sealing ring is provided with an annular groove with a diameter gradually increasing from the center to the outside, and the upper cover of the outer shell is provided with a corresponding limiting ring facing the groove of the glass sealing ring.

[0022] Preferably, any of the above schemes further includes a sensor housing, which is threadedly connected to the sensor mounting port, the sensor PCB board and sensor PCB board 1 are both limited in the sensor housing, the internal thread of the sensor housing is installed with the sensor housing 1, and the sensor is limited in the sensor housing 1.

[0023] Preferably, in any of the above solutions, a dustproof net fixing piece is provided at the bottom end of the sensor, and the dustproof net fixing piece is embedded in the sensor housing 1 by means of threads.

[0024] Preferably in any of the above solutions, a gas collecting hood is installed at one end of the sensor housing.

[0025] Preferably, in any of the above solutions, sensor sealing rings are provided at both ends of the sensor housing.

[0026] Preferably in any of the above solutions, an upper sealing ring is provided in the lower cover of the housing.

[0027] The technical effects and advantages of the utility model are as follows: the fixed gas detector is provided with an upper cover and a lower cover to protect the PCB board inside, and the limiting structure of the PCB board and the lower cover makes the PCB board more firm when in use, and the upper cover, the lower cover and the sensor housing also have a limiting structure, so that the whole is firm, and the sensor PCB board and the sensor PCB board are installed in the sensor housing and then integrated into the lower cover of the housing, which greatly protects the PCB board, greatly avoids the possibility of internal components being damaged by the external environment, and can achieve rapid installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0030] Figure 3 It is an exploded view of the utility model;

[0031] Figure 4 This is an exploded view of the utility model from another perspective;

[0032] Figure 5 It is an exploded view of the bottom perspective of the present invention;

[0033] Figure 6 It is a structural schematic diagram of part of the structure of the utility model;

[0034] Figure 7 This is a schematic diagram of the structure of the upper cover and the lower cover connected to each other in the utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the sensor housing and the gas collecting cover connected to the utility model;

[0036] Fig. 9 This is a schematic diagram of the internal structure of the sensor housing of the utility model;

[0037] Fig.10 It is a structural schematic diagram of the connection between the screen bracket and the display screen of the utility model.

[0038] In the figure: 1. Upper cover of the outer shell; 2. Glass sealing ring; 3. Explosion-proof glass; 4. Glass fixing ring; 5. Handle; 6. Upper cover; 7. PCB board; 8. Lower cover; 9. Upper sealing ring; 10. Lower cover of the outer shell; 11. Screen bracket; 12. Display screen; 13. Sensor outer shell; 14. Sensor outer shell 1; 15. Air collecting cover; 16. Dust net fixing part; 17. Sensor; 18. Sensor PCB board; 19. Sensor PCB board 1; 20. Sensor sealing ring. DETAILED DESCRIPTION

[0039] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0042] The utility model provides Figure 1-5 A gas detector is shown, comprising

[0043] The upper cover 1 of the housing is provided with an opening, and the edge thereof extends outward to form an extension portion, and the inner wall of the extension portion is provided with an internal thread;

[0044] The outer shell lower cover 10 has an edge extending outward to form an extension part 1, and the outer surface of the extension part 1 is provided with an external thread, the extension part 1 is threadedly connected with the extension part, and a cavity is formed between the outer shell upper cover 1 and the outer shell lower cover 10 after the connection, and a plurality of mounting holes are opened at the edge of the outer shell lower cover 10, which can be fixed by bolts or clamps, and an upper sealing ring 9 is installed in the outer shell lower cover 10;

[0045] Reference Figure 6 and Figure 7 As shown, the lower cover 8 has a plurality of limiting columns integrally formed inside thereof;

[0046] The upper cover 6 is connected to the lower cover 8. The outer surfaces of the lower cover 8 and the upper cover 6 are provided with a limiting groove near the top. The inner wall of the lower cover 10 of the outer shell is provided with a limiting strip. The limiting strip and the limiting groove are limited so that the connected lower cover 8 and the upper cover 6 are limited in the cavity. The outer surface of the upper cover 6 is provided with a handle 5.

[0047] The display screen 12 is installed in the upper cover 6 through the screen bracket 11. Specifically, the display screen 12 is limited on the screen bracket 11 through a limiting groove, and the screen bracket 11 abuts against the inner wall of the upper cover 6, so that the display screen 12 is fixed. Moreover, the installed display screen 12 is directly opposite to the opening of the upper cover 1 of the outer shell, and the display screen 12 is connected to the PCB board 7.

[0048] The PCB board 7 has a limiting hole on its edge, and the PCB board 7 is limited in the lower cover 8 by cooperating with the limiting hole and the limiting column in the lower cover 8. There are multiple connectors on the PCB board 7, such as a sensor connector, an expansion port connector, and an alarm connector, and the display screen 12 is also connected to a connector dedicated to the display screen.

[0049] Next, in order to protect the display screen 12, an explosion-proof glass 3 is placed in front of the display screen 12, and an annular glass fixing ring 4 and a glass sealing ring 2 are placed on both sides of the explosion-proof glass 3. The glass fixing ring 4 is close to the display screen 12, and the glass sealing ring 2 is close to the outer shell cover 1. The outer surface of the glass fixing ring 4 has a thread matching the internal thread of the outer shell cover 1, so that during installation, the glass fixing ring 4 is also threadedly fixed to the outer shell cover 1, rather than just by clamping, which is more secure. One side of the glass sealing ring 2 is provided with an annular groove with a gradually increasing diameter from the center to the outside, and the outer shell cover 1 is provided with a corresponding limit ring facing the groove of the glass sealing ring 2, which is more fitted during installation to prevent movement.

[0050] The lower cover 10 of the housing is provided with three sensor installation ports, and the sensor housing 13 is threadedly installed on one of the sensor installation ports. The sensor PCB board 18 and the sensor PCB board 18 and the sensor PCB board 19 are limited in the sensor housing 13. The sensor PCB board 18 and the sensor PCB board 19 are also connected through a plug-in connector to achieve communication. These are conventional means. The sensor PCB board 19 is connected to the sensor connector of the PCB board 7;

[0051] The sensor 17 is connected to the sensor PCB board 18. The sensor housing 13 is internally threaded with a sensor housing 14. The sensor 17 is limited in the sensor housing 14, and a dust screen fixing 16 is installed at the bottom of the sensor 17. The dust screen fixing 16 is embedded in the sensor housing 14 by means of threads. The sensor housing 13 is located at one end of the sensor 17 and an air collecting hood 15 is installed. The air collecting hood 15 is in the shape of a trumpet with an opening downward and has holes evenly opened on the surface. Sensor sealing rings 20 are provided at both ends of the sensor housing 13.

[0052] During the use of the fixed gas detector, the gas enters the sensor housing 13 from the gas collecting hood 15, and then is detected by the sensor 17. After detection, the gas passes through the sensor PCB board 18, the sensor PCB board 19 and the PCB board 7, and is finally displayed on the display screen 12. These processes are conventional means and are not described here one by one. The technical point of this application lies in its structure.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fixed gas detector, characterized in that: include An upper cover of the housing (1) is provided with an opening, and the edge of the upper cover extends outward to form an extension portion, wherein the inner wall of the extension portion is provided with an internal thread; The outer shell lower cover (10) has an edge extending outward to form an extension part 1, and the outer surface of the extension part 1 is provided with an external thread, the extension part 1 is threadedly connected to the extension part, and after the connection, a cavity is formed between the outer shell upper cover (1) and the outer shell lower cover (10); A PCB board (7) is arranged in the cavity; A display screen (12) is arranged in the cavity and located at the opening of the upper cover (1) of the housing, and the display screen (12) is connected to the PCB board (7); A sensor PCB board (18) and a sensor PCB board one (19) connected thereto, wherein the sensor PCB board one (19) is connected to the PCB board (7); The sensor (17) is connected to the sensor PCB board (18).

2. A fixed gas detector according to claim 1, characterized in that: The housing lower cover (10) is provided with a plurality of sensor installation openings.

3. A fixed gas detector according to claim 1, characterized in that: Also includes A lower cover (8) is provided with a plurality of limiting columns inside, and the PCB board (7) is limited in position in the lower cover (8) through the limiting holes and the limiting columns; The upper cover (6) is connected to the lower cover (8), and the outer surfaces of the lower cover (8) and the upper cover (6) are both provided with limiting grooves, and the inner wall of the lower cover (10) of the outer shell is provided with limiting strips, so that the lower cover (8) and the upper cover (6) are limited in position within the cavity after being connected, and the outer surface of the upper cover (6) is provided with a handle (5); The display screen (12) is installed in the upper cover (6) via a screen bracket (11).

4. A fixed gas detector according to claim 3, characterized in that: The display screen (12) is limited on the screen bracket (11) by means of a limiting groove, and the screen bracket (11) abuts against the inner wall of the upper cover (6).

5. A fixed gas detector according to claim 3, characterized in that: It also includes a glass fixing ring (4) located close to the upper cover (6), and the outer surface of the glass fixing ring (4) is provided with threads matching the internal threads of the upper cover (1) of the housing; An explosion-proof glass (3) and a glass sealing ring (2), wherein the explosion-proof glass (3) is arranged between the glass sealing ring (2) and a glass fixing ring (4), one side of the glass sealing ring (2) is provided with an annular groove with a diameter gradually increasing from the center to the outside, and the outer shell upper cover (1) is provided with a corresponding limiting ring facing the groove of the glass sealing ring (2).

6. A fixed gas detector according to claim 2, characterized in that: The invention also comprises a sensor housing (13), wherein the sensor housing (13) is threadedly connected to the sensor mounting port, the sensor PCB board (18) and the sensor PCB board one (19) are both limited in the sensor housing (13), the sensor housing one (14) is threadedly mounted on the interior of the sensor housing (13), and the sensor (17) is limited in the sensor housing one (14).

7. A fixed gas detector according to claim 6, characterized in that: A dustproof net fixing part (16) is provided at the bottom end of the sensor (17), and the dustproof net fixing part (16) is embedded in the sensor housing (14) by means of threads.

8. A fixed gas detector according to claim 6, characterized in that: The sensor housing (13) is provided with a gas collecting cover (15) at one end of the sensor (17).

9. A fixed gas detector according to claim 6, characterized in that: Sensor sealing rings (20) are arranged at both ends of the sensor housing (13).

10. A fixed gas detector according to claim 1, characterized in that: An upper sealing ring (9) is arranged in the lower cover (10) of the housing.

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