Acetylene gas sensor

Abstract

The utility model discloses an acetylene gas sensor, including shell and the signal conversion circuit board and communication circuit board of being all arranged in the shell, signal conversion circuit board and communication circuit board are connected with each other, still include detection head, be equipped with detection column on the shell, the lower extreme of detection head is equipped with the pin, and detection head is inserted in the detection column, and the pin is inserted to signal conversion circuit board, makes detection head with signal conversion circuit board connection. The utility model has the beneficial effect that: compact and reasonable structure design, detection head and circuit board connection stable and reliable, convenient installation maintenance, effectively guarantee the accuracy and stability of acetylene gas detection, improve the overall performance of sensor.

Description

Technical Field

[0001] This utility model relates to gas sensors, and more specifically to an acetylene gas sensor. Background Technology

[0002] Existing acetylene sensors consist of a housing, a detection circuit board inside the housing, and a detection chamber on the housing. The detection circuit board is composed of an acetylene gas sensor, a signal conversion circuit board, and a communication circuit board. The acetylene gas sensor is located inside the detection chamber, which is connected to the external environment to be detected. The acetylene gas sensor detects data such as the concentration of acetylene gas, and after detection, the signal conversion circuit board and the communication circuit board transmit the data to an external host computer. As shown in the utility model patent with announcement number CN222801254U, entitled "A Coal Bunker Fire Monitoring and Early Warning System," gas detection is achieved by integrating a sensor on the circuit board and placing it inside the monitoring tube. However, this structure directly sends the gas to be detected into the monitoring tube through the inlet and outlet pipes, and the entire housing is a one-piece structure. This only enables the detection of one type of gas, reducing the sensor's applicable range. Furthermore, it presents difficulties in repairing and replacing the sensor when the sensor head is damaged. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an acetylene gas sensor, which solves the problems of narrow application range and difficulty in repair and replacement after damage by setting a pluggable detection head.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an acetylene gas sensor, comprising a housing and a signal conversion circuit board and a communication circuit board both disposed within the housing, the signal conversion circuit board and the communication circuit board being interconnected, and a detection head, wherein a detection post is provided on the housing, a pin is provided at the lower end of the detection head, the detection head is inserted into the detection post, and the pin is inserted into the signal conversion circuit board, thereby connecting the detection head to the signal conversion circuit board.

[0005] As a further improvement of this utility model, the detection head includes a head shell and a detection circuit board. The detection circuit board is fixedly installed on the lower end of the head shell, and the pin is fixed on the detection circuit board. A detection cavity is formed inside the head shell. An air inlet pipe is provided on the left side of the head shell, and an air outlet pipe is provided on the right side. The gas to be detected enters the detection cavity through the air inlet pipe and is then sent out through the air outlet pipe.

[0006] As a further improvement of this utility model, U-shaped notches are provided on both the left and right sides of the upper end of the detection column. When the detection head is inserted into the detection column, the air inlet pipe and the air outlet pipe are respectively embedded in the two U-shaped notches.

[0007] As a further improvement of this utility model, several mounting posts are fixed at the bottom inside the housing, the communication circuit board is fixedly mounted on the mounting posts, the lower end of the detection post is fixedly mounted on the mounting posts and is located above the communication circuit board, and the signal conversion circuit board is fixedly mounted on the top of the mounting posts.

[0008] As a further improvement of this utility model, a downwardly extending guide block is provided on the lower side of the top of the head shell, so that a downwardly extending U-shaped airway is formed in the detection chamber, and the ends of the air inlet pipe and the air outlet pipe that communicate with the detection chamber are located near the upper end of the U-shaped airway.

[0009] As a further improvement of this utility model, the lower edge of the head shell is provided with a mounting barb, and the detection circuit board is mounted to the bottom of the head shell through the mounting barb. The upper side of the detection circuit board is provided with a detection head, and the detection circuit board is provided with a sealing ring that surrounds the detection head. A groove is opened on the lower end face of the head shell, and the sealing ring is embedded in the groove.

[0010] The beneficial effects of this invention are as follows: By adopting a pluggable detection head design, this invention completely solves the problem of existing integrated sensors being limited to detecting only one type of gas and thus having a limited range of applications. The detection head and the signal conversion circuit board are detachably connected via pins. When different gases need to be detected, only the corresponding detection head needs to be replaced, significantly expanding the sensor's applicable scenarios. Furthermore, when the detection head is damaged, there is no need to replace the entire sensor; only the detection head needs to be replaced, reducing maintenance costs and operational difficulty, demonstrating significant advancements. Subsequent structural improvements further enhance the sensor's practicality: the design of the inlet and outlet pipes ensures smooth gas flow; the U-shaped notch enables precise positioning of the detection head; the layout of the mounting posts ensures stable installation of the internal circuit board; the U-shaped gas channel extends the gas detection path, improving detection accuracy; and the mounting barbs and sealing rings ensure the detection head's secure installation and sealing. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the acetylene gas sensor of this utility model; Figure 2 This is a schematic diagram of the internal structure of the acetylene gas sensor of this utility model. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0013] Reference Figure 1 and Figure 2As shown, an acetylene gas sensor according to this embodiment includes a housing 1 and a signal conversion circuit board 3 and a communication circuit board 4, both disposed within the housing 1. The signal conversion circuit board 3 and the communication circuit board 4 are interconnected. It also includes a detection head 2. A detection post 6 is provided on the housing 1, and a pin 21 is provided at the lower end of the detection head 2. The detection head 2 is inserted into the detection post 6, and the pin 21 is inserted into the signal conversion circuit board 3, thus connecting the detection head 2 to the signal conversion circuit board 3. Existing sensors have a one-piece structure, can only detect one type of gas, and are inconvenient to maintain. In this structure, the detection head 2 is detachably connected to the signal conversion circuit board 3 via the pin 21. When different gases need to be detected, a suitable detection head 2 can be replaced. When the detection head 2 is damaged, it can be directly disassembled and replaced without replacing the entire sensor, effectively solving the shortcomings of the prior art.

[0014] Furthermore, refer to Figure 2 As shown, the detection head 2 includes a head shell 22 and a detection circuit board 27. The detection circuit board 27 is fixedly mounted on the lower end of the head shell 22, and the pin 21 is fixed on the detection circuit board 27. A detection chamber is formed inside the head shell 22. An air inlet pipe 23 is provided on the left side of the head shell 22, and an air outlet pipe 24 is provided on the right side. The gas to be detected enters the detection chamber through the air inlet pipe 23 and is then sent out through the air outlet pipe 24. The gas to be detected enters the detection chamber through the air inlet pipe 23 and contacts the detection circuit board 27 to achieve detection. After detection, it is discharged from the air outlet pipe 24. The gas flow path is clear, ensuring a stable and efficient detection process and improving the continuity and accuracy of detection. In addition, in this embodiment, the end of the air outlet pipe 24 is equipped with a 1 / 8-inch (3.17mm) ferrule interface, which can be easily connected to existing gas circuits.

[0015] Furthermore, refer to Figure 2 As shown, U-shaped notches 25 are provided on both the left and right sides of the upper end of the detection column 6. When the detection head 2 is inserted into the detection column 6, the air inlet pipe 23 and the air outlet pipe 24 are respectively embedded in the two U-shaped notches 25. During the installation of the detection head 2, the air inlet pipe 23 and the air outlet pipe 24 are embedded in the U-shaped notches 25, which realizes the quick positioning of the detection head 2, avoids the displacement during installation, ensures the unobstructed flow of the air inlet pipe 23 and the air outlet pipe 24, and enhances the stability of the detection head 2 after installation, preventing displacement during use.

[0016] Furthermore, refer to Figure 2 As shown, several mounting posts 11 are fixed to the bottom inside the outer casing 1. The communication circuit board 4 is fixedly mounted on the mounting posts 11. The lower end of the detection post 6 is fixedly mounted on the mounting posts 11 and is located above the communication circuit board 4. The signal conversion circuit board 3 is fixedly mounted on the top of the mounting posts 11. The mounting posts 11 fix the communication circuit board 4, the detection post 6, and the signal conversion circuit board 3 in layers, making the internal structure layout reasonable and preventing interference between the components. This ensures the stability of the circuit connection and facilitates internal wiring and heat dissipation.

[0017] Furthermore, refer to Figure 2 As shown, a downward-extending guide block 26 is provided on the lower side of the top of the head shell 22, forming a downward-extending U-shaped air channel inside the detection chamber. The ends of the inlet pipe 23 and the outlet pipe 24 that communicate with the detection chamber are both located near the upper end of this U-shaped air channel. The U-shaped air channel formed by the guide block 26 prolongs the residence time of the gas in the detection chamber, allowing the gas to fully contact the detection circuit board 27, improving the accuracy of the detection data, and avoiding the problem of insufficient detection due to excessive gas flow rate.

[0018] Furthermore, refer to Figure 2 As shown, the lower edge of the head shell 22 is provided with a mounting hook 221. The detection circuit board 27 is mounted to the bottom of the head shell 22 via the mounting hook 221. The upper side of the detection circuit board 27 is provided with a detection head. The detection circuit board 27 is provided with a sealing ring 231 that surrounds the detection head. A groove is opened on the lower end face of the head shell 22, and the sealing ring 231 is embedded in the groove. The mounting hook 221 enables quick installation and removal of the detection circuit board 27, while the sealing ring 231 enhances the sealing of the detection chamber, preventing gas leakage from affecting the detection results, and also preventing external impurities from entering the detection chamber and damaging the components.

[0019] In summary, this utility model, through its pluggable detection head design, successfully solves the core problems of narrow applicability and inconvenient maintenance of existing sensors. Combined with subsequent structural improvements, it further enhances detection accuracy, installation stability, and ease of use, demonstrating significant practical value.

[0020] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An acetylene gas sensor, comprising a housing (1) and a signal conversion circuit board (3) and a communication circuit board (4) both disposed within the housing (1), wherein the signal conversion circuit board (3) and the communication circuit board (4) are interconnected, characterized in that: It also includes a detection head (2), a detection post (6) is provided on the outer shell (1), and a pin (21) is provided at the lower end of the detection head (2). The detection head (2) is inserted into the detection post (6), and the pin (21) is inserted into the signal conversion circuit board (3), so that the detection head (2) is connected to the signal conversion circuit board (3).

2. The acetylene gas sensor according to claim 1, characterized in that: The detection head (2) includes a head shell (22) and a detection circuit board (27). The detection circuit board (27) is fixedly installed on the lower end of the head shell (22). The pin (21) is fixed on the detection circuit board (27). A detection cavity is formed inside the head shell (22). An air inlet pipe (23) is provided on the left side of the head shell (22), and an air outlet pipe (24) is provided on the right side. The gas to be detected enters the detection cavity from the air inlet pipe (23) and is then sent out from the air outlet pipe (24).

3. The acetylene gas sensor according to claim 2, characterized in that: The detection column (6) has U-shaped notches (25) on both the left and right sides at the upper end. When the detection head (2) is inserted into the detection column (6), the air inlet pipe (23) and the air outlet pipe (24) are respectively embedded in the two U-shaped notches (25).

4. The acetylene gas sensor according to claim 3, characterized in that: Several mounting posts (11) are fixed at the bottom inside the outer casing (1). The communication circuit board (4) is fixedly mounted on the mounting posts (11). The lower end of the detection post (6) is fixedly mounted on the mounting posts (11) and is located above the communication circuit board (4). The signal conversion circuit board (3) is fixedly mounted on the top of the mounting posts (11).

5. The acetylene gas sensor according to claim 4, characterized in that: The head shell (22) has a downward-extending guide block (26) on its lower top side, which forms a downward-extending U-shaped airway in the detection chamber. The ends of the air inlet pipe (23) and the air outlet pipe (24) that communicate with the detection chamber are located near the upper end of the U-shaped airway.

6. The acetylene gas sensor according to claim 5, characterized in that: The lower edge of the head shell (22) is provided with a mounting barb (221). The detection circuit board (27) is installed on the bottom of the head shell (22) through the mounting barb (221). The upper side of the detection circuit board (27) is provided with a detection head. The detection circuit board (27) is provided with a sealing ring (231) that surrounds the detection head. The lower end face of the head shell (22) is provided with a groove, and the sealing ring (231) is embedded in the groove.

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