Fixed gas detection device

Abstract

The utility model relates to gas detection, and particularly discloses a fixed gas detection device which comprises a shell, a through hole formed in the side wall of the shell, a detection pipe horizontally arranged in the shell, a detector arranged outside the detection pipe, sealing covers hinged to the two ends of the detector and a driving device used for driving the sealing covers to rotate. And a detection head of the detector is arranged in the detection tube. According to the fixed gas detection device, high-concentration dust can be effectively prevented from covering the detection head, so that the gas detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of gas detection, and more specifically, to a fixed gas detection device. Background Technology

[0002] Gas detection is very common in production and daily life. It mainly uses gas sensors to detect the types of gases present in the environment. Gas sensors are used to detect the composition and content of gases. Gas detection can be used not only to detect combustible gases such as methane, ethane, and carbon monoxide, but also to detect the content of specific components in the air, such as particulate pollutants.

[0003] For chemical production, setting up multi-point fixed gas detection devices can monitor the concentration of combustible gases and dust pollution index in the production environment in real time, preventing accidents such as explosions and fires and improving worker safety. However, the production process itself generates a large amount of dust, resulting in high dust concentrations. This dust can accumulate on gas detection sensors, affecting their accuracy and performance. Therefore, it is necessary to design a gas detection device that can effectively shield against dust accumulation. Utility Model Content

[0004] The purpose of this invention is to provide a fixed gas detection device that can effectively prevent high concentrations of dust from covering the detection head, thereby improving the accuracy of gas detection.

[0005] This utility model is achieved through the following technical solution: The fixed gas detection device of this utility model includes a housing, a through hole opened in the side wall of the housing, a detection tube horizontally disposed in the housing, a detector disposed outside the detection tube, a sealing cover hinged to both ends of the detector, and a driving device for driving the sealing cover to rotate; the detection head of the detector is disposed inside the detection tube.

[0006] Furthermore, the driving device includes a gas filling pipe communicating with the side wall of the detection tube, a gas storage cylinder connected to the gas filling pipe, and a valve located at the gas outlet of the gas storage cylinder.

[0007] Furthermore, the gas storage cylinder is connected to a gas supply pipe, which extends downward after passing through the bottom wall of the housing.

[0008] Furthermore, the valve is an automatic valve.

[0009] Furthermore, the sealing cap is hinged to the upper side of the detection tube; the driving device also includes a pair of branch pipes respectively disposed on opposite side walls of the gas filling pipe, a top rod slidably disposed in the branch pipe, and a first spring connected to the top rod; the branch pipe and the sealing cap are disposed on the same side of the detection tube; one branch pipe is disposed close to one sealing cap.

[0010] Furthermore, the lower end of the gas filling pipe is located inside the detection pipe, a baffle is provided directly below the gas filling pipe, and a second spring is provided inside the lower end of the gas filling pipe, with the lower end of the second spring fixedly connected to the baffle.

[0011] Furthermore, the elastic modulus of the second spring is greater than that of the first spring.

[0012] Furthermore, the sealing cap is made of a material that can be attracted by a magnet, and a magnet is provided on the side wall of the branch pipe near the sealing cap.

[0013] Furthermore, both ends of the detection tube are angled upwards.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects: The fixed gas detection device of this utility model is installed in a place where gas detection needs to be performed regularly. The device can perform gas composition detection at regular intervals or periodically. When detection is required, the driving device drives the sealing cover to rotate, so that the two ends of the detection tube are connected to the outside. The outside gas enters the detection tube, and the detector and detection head detect the gas composition in the detection tube. After the detection is completed, the driving device drives the sealing cover to rotate again to block the two ends of the detection tube, preventing outside air from entering the detection tube. In this way, for areas with high dust concentration, it can effectively prevent the detection tube and detection head from being covered with dust, thus avoiding affecting the normal detection function of the detection head. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the fixed gas detection device provided in the embodiment of this utility model;

[0016] Figure 2 A schematic diagram of the structure of a driving device in one state provided in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the two states of the driving device provided in an embodiment of the present utility model;

[0018] Figure 4 for Figure 2 A sectional view along the vertical direction.

[0019] Icons: 11-Housing, 12-Through hole, 21-Detection tube, 22-Detector, 23-Detection head, 24-Sealing cover, 30-Drive device, 31-Gas filling pipe, 32-Gas storage tank, 33-Branch pipe, 34-Top rod, 35-First spring, 36-Baffle, 37-Second spring. Detailed Implementation

[0020] Example

[0021] The following description, in conjunction with specific embodiments, further illustrates the points, as shown in the appendix. Figure 1 -Appendix Figure 4 As shown, the fixed gas detection device of this embodiment includes a housing 11, a through hole 12 formed in the side wall of the housing 11, a detection tube 21 horizontally disposed inside the housing 11, a detector 22 disposed outside the detection tube 21, a sealing cover 24 hinged to both ends of the detector 22, and a drive device 30 for driving the sealing cover 24 to rotate; the detection head 23 of the detector 22 is disposed inside the detection tube 21. Specifically, in use, it is installed in a place where gas detection needs to be performed regularly. The device can perform gas composition detection periodically or periodically. When detection is required, the drive device 30 drives the sealing cover 24 to rotate (as shown in the attached diagram). Figure 2 As shown in the attached diagram, the detection tube 21 is connected to the outside environment at both ends, allowing outside gas to enter the detection tube 21. The detector 22 and the detection head 23 detect the gas composition in the detection tube 21. After the detection is completed, the driving device 30 drives the sealing cover 24 to rotate, re-blocking both ends of the detection tube 21 (as shown in the attached diagram). Figure 3 As shown in the figure, this prevents outside air from entering the detection tube 21. In areas with high dust concentration, this can effectively prevent the detection tube 21 and the detection head 23 from being covered with dust, thus avoiding affecting the normal detection function of the detection head 23.

[0022] The driving device 30 in this embodiment includes a gas filling pipe 31 communicating with the side wall of the detection tube 21, a gas storage cylinder connected to the gas filling pipe 31, and a valve located at the gas outlet of the gas storage cylinder. The gas storage cylinder is connected to a gas replenishment pipe, which extends downward after passing through the bottom wall of the housing 11. The valve is an automatic valve. Specifically, in its natural state, the sealing cap 24 naturally covers the end of the detection tube 21 under the action of gravity. When gas needs to be detected, the valve on the gas storage cylinder opens in a short time, and the gas in the gas storage cylinder quickly rushes into the gas filling pipe 31 and into the detection tube 21, blowing the sealing caps 24 at both ends of the detection tube 21, causing the sealing caps 24 to flip over, thereby connecting the detection tube 21 with the outside air. This also allows the gas to clean the detection tube 21, removing dust from the inside of the detection tube 21 and the detection head 23, making the detection results more accurate.

[0023] In this embodiment, the sealing cap 24 is hinged to the upper side of the detection tube 21; the driving device 30 also includes a pair of branch pipes 33 respectively disposed on opposite side walls of the gas filling pipe 31, a top rod 34 slidably disposed within the branch pipe 33, and a first spring 35 connected to the top rod 34; the branch pipes 33 and the sealing cap 24 are disposed on the same side of the detection tube 21; one branch pipe 33 is disposed close to one sealing cap 24. The lower end of the gas filling pipe 31 is disposed inside the detection tube 21, a baffle 36 is disposed directly below the gas filling pipe 31, and a second spring 37 is disposed inside the lower end of the gas filling pipe 31, the lower end of the second spring 37 being fixedly connected to the baffle 36. The elastic modulus of the second spring 37 is greater than that of the first spring 35. Specifically, before gas detection, the gas storage tank 32 pumps gas into the detection tube 21, opening the sealing cover 24 so that it flips over and rests against the branch pipe 33. After the detection is completed, the gas storage tank 32 discharges a certain amount of gas (less than the amount of gas before the detection). Since the elastic modulus of the second spring 37 is greater than that of the first spring 35, the first spring 35 will be stretched first. That is, this part of the gas will push the push rod 34 to move first. The push rod 34 will then push the sealing cover 24, pushing it back from the vertical position to its original position. Then the gas pushes the baffle 36 open and enters the detection tube 21, performing a simple purging of the detection tube 21 to blow away the dust in the detection tube 21. Since the amount of gas at this time is small, it is not possible to blow the sealing cover 24 back to the vertical position.

[0024] In this embodiment, the sealing cap 24 is made of a material that can be attracted by a magnet, and a magnet is provided on the side wall of the branch tube 33 near the sealing cap 24. Specifically, when the sealing cap 24 is flipped upward, it contacts the magnet at the end of the branch tube 33 and is thus attracted by the magnet, which keeps the sealing cap 24 in a stable vertical state.

[0025] In this embodiment, both ends of the detection tube 21 are angled and facing upwards.

[0026] In summary, the fixed gas detection device of this embodiment is installed in a location where gas detection needs to be performed periodically. The device can perform gas composition detection at regular intervals or periodically. When detection is required, the drive device 30 drives the sealing cover 24 to rotate, so that both ends of the detection tube 21 are connected to the outside. Outside gas enters the detection tube 21, and the detector 22 and the detection head 23 detect the gas composition in the detection tube 21. After the detection is completed, the drive device 30 drives the sealing cover 24 to rotate, and re-blocks both ends of the detection tube 21 to prevent outside air from entering the detection tube 21. In this way, for areas with high dust concentration, it can effectively prevent the detection tube 21 and the detection head 23 from being covered with dust, thus avoiding affecting the normal detection function of the detection head 23.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stationary gas detection device, characterized in that: Includes a housing (11), a through hole (12) opened in the side wall of the housing (11), a detection tube (21) horizontally disposed in the housing (11), a detector (22) disposed outside the detection tube (21), a sealing cover (24) hinged to both ends of the detector (22), and a driving device (30) for driving the sealing cover (24) to rotate; The detection head (23) of the detector (22) is located inside the detection tube (21).

2. The stationary gas detection device according to claim 1, characterized in that: The driving device (30) includes a gas filling pipe (31) communicating with the side wall of the detection pipe (21), a gas storage cylinder connected to the gas filling pipe (31), and a valve located at the gas outlet of the gas storage cylinder.

3. The stationary gas detection device according to claim 2, characterized in that: The gas storage cylinder is connected to a gas supply pipe, which extends downward after passing through the bottom wall of the housing (11).

4. The stationary gas detection device according to claim 2, characterized in that: The valve is an automatic valve.

5. The stationary gas detection device according to claim 2, characterized in that: The sealing cap (24) is hinged to the upper side of the detection tube (21); The drive device (30) further includes a pair of branch pipes (33) respectively disposed on opposite side walls of the gas filling pipe (31), a push rod (34) slidably disposed in the branch pipe (33), and a first spring (35) connected to the push rod (34); the branch pipe (33) and the sealing cover (24) are disposed on the same side of the detection tube (21); one branch pipe (33) is disposed close to one sealing cover (24).

6. The stationary gas detection device according to claim 5, characterized in that: The lower end of the gas filling pipe (31) is located inside the detection pipe (21). A baffle (36) is located directly below the gas filling pipe (31). A second spring (37) is located inside the lower end of the gas filling pipe (31). The lower end of the second spring (37) is fixedly connected to the baffle (36).

7. The stationary gas detection device according to claim 6, characterized in that: The elastic modulus of the second spring (37) is greater than that of the first spring (35).

8. The stationary gas detection device according to claim 6, characterized in that: The sealing cap (24) is made of a material that can be attracted by a magnet, and the side wall of the branch pipe (33) near the sealing cap (24) is provided with a magnet.

9. The stationary gas detection device according to claim 6, characterized in that: The detection tube (21) has two upward-facing oblique openings at both ends.

Images